CN105806670B - A kind of AUTOMATIC STATIC case jacking system for automatic gas sample collection station - Google Patents

Abstract

The invention relates to an automatic static box lifting system for an automatic gas sample collection station. The automatic gas sample collection station includes an automatic static box for collecting gas and an automatic static box lifting system. The automatic static box includes a fixed The base and the main frame that can be lifted relative to the base; the automatic static box lifting system includes a guide support tube, a DC gear motor, a lifting arm, a screw, a slider, a base, a magnet, a magnetic induction probe and a guide groove, and a slider set On the screw rod, the slider is connected to one end of the lifting arm passing through the guide groove, and the other end of the lifting arm is connected to the main frame of the automatic static box, and the upper part of the guide groove is provided with an oblique upward deflection groove. The invention adopts the screw rod to lift the automatic static box, which saves power and ensures high reliability, and deflects when the automatic static box is lifted to the top, which greatly reduces the influence of the automatic static box on the measured plot.

Description

An Automatic Static Box Lifting System for an Automatic Gas Sample Collection Station

This case is a divisional application of a patent application with an application date of April 10, 2014, an application number of 2014101414555, and an invention title of "An Automatic Gas Sample Collection Station for Monitoring Greenhouse Gas Emission Flux".

Technical field:

The present invention relates to automatic gas sample collection, particularly an automatic static box lifting system in an automatic sample collection device for monitoring gas emission flux in atmospheric environment conditions, mainly used for researching farmland, grassland and woodland (low forest trees) ) The gas sample automatic collection device when monitoring the rate of emission of greenhouse gases into the atmosphere by soil and correspondingly grown plants can also be used for automatic collection of gas samples in other gas environments.

Background technique:

Climate change is one of the most important issues that all human beings must face at present. It is mainly due to the overall trend of climate warming, which has an important impact on the entire earth's environment and all aspects of human life. Current scientific research shows that climate warming is mainly caused by the large amount of greenhouse gases emitted by human activities, which leads to the overall warming of the atmospheric environment. According to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), the most authoritative organization in international climate change research, it is pointed out that 95% of climate warming may be due to greenhouse gases (mainly including carbon dioxide) emitted by human activities such as fossil fuel combustion and land use change. , methane and nitrous oxide, etc.) lead to an increase in the concentration of greenhouse gases in the atmosphere. Since the industrialization of civilization in 1750, human activities have greatly accelerated the emission of greenhouse gases into the atmosphere, causing a sharp increase in its concentration. The three most important greenhouse gases are carbon dioxide (CO ₂ ), methane (CH ₄ ) and nitrous oxide (N ₂ O) concentrations increased from 280, 0.72, and 0.27ppm before industrialization to 393, 1.819, and 0.325ppm in 2012, and the current growth rate is still accelerating. In the past 130 years (1880-2012), the global The average surface air temperature increased by 0.85°C. The climate will further warm in the future, and it is expected that the temperature will rise by at least 1.5°C by the end of the 21st century.

At the 13th Conference of the Parties on Global Climate Change held in Bali in 2007, developed countries put forward specific requirements for developing countries to measure, report and verify greenhouse gases, which requires a large number of sample collection and analysis to achieve. China's current total greenhouse gas emissions have leapt to the top of the world, and China is facing increasing pressure in addressing climate change and reducing greenhouse gas emissions during the conference negotiations. The monitoring of greenhouse gas emissions is the basis of climate change research. The method of measurement is mainly to take a gas sample at regular intervals through a closed static box on the surface of the plot to be measured, and use gas chromatography to measure each gas sample. Greenhouse gas concentration, the greenhouse gas emission flux, that is, the greenhouse gas emission rate is calculated by the changes in the greenhouse gas concentration in multiple samples taken. At present, the vast majority of gas sample collection is still carried out manually.

There are several major disadvantages in artificial gas sample collection: 1) The workload of sample collection is very huge. Sometimes the collection of samples at a single point requires at least 2 people to cooperate with repetitive tasks such as removing the cover, collecting, and timing. People need more people to sample different points at the same time, and the demand for manpower is greater; 2) Artificial interference to sampling is large. When collecting samples manually, the CO ₂ breathed by the sampler and the disturbance of the soil due to footsteps, cover boxes, etc. will cause greater interference to sample collection; 3) It is not convenient for all-weather sampling. When the weather conditions are bad, the time point is inappropriate, or when sampling is required at night, manual sampling is greatly restricted; 4) Manual sampling has large individual errors and is prone to errors. Sampling will be different due to different people's operation methods, and manual sampling timing cannot be very accurate, and the calculation of gas flux is strictly calculated according to unit time. The speed of operation will make the calculation error larger, and human errors may occur It will also have a certain impact on gas collection.

In order to overcome the unfavorable factors in artificial gas sample collection, the present invention intends to develop a fully automatic greenhouse gas collection station, which can realize automatic opening and closing of airtight boxes and automatic collection of gas under unattended conditions according to the set sampling time and requirements. The samples are stored in airtight vacuum bottles, and the gas sample bottles are regularly replaced manually to realize automatic collection of greenhouse gas samples.

At present, there are also some automatic gas sampling devices at home and abroad. The typical ones are the automatic collection of samples using bladders and negative pressure. It is suitable for the collection of samples of the average air quality of the atmospheric environment for a long time, and the collection is an average value of the air quality for a long time , is not suitable for the observation of greenhouse gas flux, and the degree of automation is not high; there is also a typical type of portable gas sampler, which is mainly used for on-site air quality sampling and testing, and it is only suitable for a single sample Acquisition must also be realized with the on-site participation of people. At present, there is no fully automatic collection device for studying greenhouse gas fluxes.

The invention will use batteries and solar panels for power supply, can work around the clock, and can also be remotely controlled. It is mainly used in scientific research that requires a large number of greenhouse gas sample collection, and will greatly improve the efficiency of gas sample collection in greenhouse gas monitoring. Change service.

Invention content:

Aiming at the disadvantageous conditions of manual sampling mentioned above, the main purpose of the present invention is to provide an automatic static box lifting system for automatic gas sample collection station.

Above-mentioned purpose of the present invention is achieved through the following technical solutions:

An automatic static box lifting system for an automatic gas sample collection station, the automatic gas sample collection station includes an automatic static box for collecting gas and an automatic static box lifting system, the automatic static box includes a fixed base and The main frame that can be lifted relative to the base; the automatic static box lifting system includes a guide support tube, a DC gear motor, a lift arm, a screw, a slider, a base and a guide groove, and the guide support tube is a tubular structure fixed on the base A guide groove is provided on the side facing the automatic static box, a screw rod with external threads is provided at the inner axis, the upper end of the screw rod is connected with the output shaft of the DC geared motor, and a slider set with internal threads is provided On the screw rod, the slider is connected to one end of the lifting arm passing through the guide groove, and the other end of the lifting arm is connected to the main frame of the automatic static box.

In the above-mentioned automatic static box lifting system, the upper part of the guide groove is provided with an oblique upward deflection groove, and when the slider sliding in the guide groove is lifted to the position of the deflection groove, the slider deflects toward the direction of the deflection groove.

In the above-mentioned automatic static box lifting system, magnets are fixed on the slider, and magnetic induction probes are provided on the outside of the guide support tube below the deflection groove and below the guide groove.

In the above-mentioned automatic static box lifting system, the lifting arm includes two parallel horizontal solid rods and a vertical solid rod connected between the two horizontal solid rods.

In the above-mentioned automatic static box lifting system, two sliders are set on the outside of the screw rod, and there are two deflection grooves on the upper part of the guide groove, and the distance between the two deflection grooves is equal to the distance between the two sliders.

In the above-mentioned automatic static box lifting system, the lifting arm includes two parallel horizontal solid rods and a vertical solid rod connected between the two horizontal solid rods, and the two horizontal solid rods connect the two horizontal solid rods respectively. slider.

In the above-mentioned automatic static box lifting system, a magnet is fixed on the slide block below, and a magnetic induction probe is arranged outside the guide support tube below the deflection slot corresponding to the slide block, and the guide support tube below the guide slot There is a magnetic induction probe on the outside. The present invention adopting above-mentioned technical scheme has the following advantages:

The invention adopts the screw rod to lift the static box, which saves power and ensures high reliability, and when the automatic static box is lifted to the top, it will deflect, which greatly reduces the influence of the automatic static box on the measured plot; in addition, the static The tank adopts a water sealing system with automatic water replenishment to ensure the airtightness of the automatic static tank;

The lifting and positioning of the screw rod of the present invention adopts the positioning mode of magnets and magnetic induction probes. This non-contact positioning not only ensures smooth movement, but also ensures the accuracy of positioning.

Description of drawings:

Fig. 1 is the overall structure schematic diagram of the present invention

Fig. 2 is a schematic diagram of the structure of the automatic static tank bottom and water sealing system of the present invention

Fig. 3 is a partially enlarged view of the top of the guide groove of the present invention

Figure 4 is a sectional view of the needle hub of the present invention

Fig. 5 is a top view of the needle insertion slider of the present invention

Fig. 6 is the front view of the top end face of the central axis of the present invention

Fig. 7 is the front view of the bottom end face of the central axis of the present invention

Figure 8 is a front view of the upper plate of the sample plate of the present invention

Fig. 9 is the front view of the disc in the sample disc of the present invention

Fig. 10 is a front view of the lower plate of the sample plate of the present invention

Fig. 11 is a cross-sectional view of the sealed bottle cap of the invention

Fig. 12 is a flow chart of invention control work

Detailed ways:

As shown in Figure 1, the present invention "an automatic sample collection station for greenhouse gas emission flux monitoring" includes a power supply system 10, a main control system 20, an automatic static box 30, a water sealing system 40, a The automatic static box lifting system 50, the first gas extraction system 60, the second gas injection system 70, the first positioning system 80 and the first sample collection system 90 are 9 parts. The composition, assembly and function realization of these 9 parts will be carried out separately below. introduce.

The power supply system 10 shown in FIG. 1 includes a battery 11 , a charging control module 12 , a solar panel 13 , a power supply voltage stabilization module 14 , wires 15 , a fixed pole 16 and a control box 18 . The storage battery 11 is used as the power source of the whole device. On the one hand, it is connected to the charging control module 12 and the solar panel 13 through wires, so that the system absorbs the energy of the sun through the solar panel 13, and the solar energy is stored in the storage battery 13 after being converted by the charging control module 12. ; On the other hand, the electric power in the storage battery 13 is output through the electric wire 15, and after being stabilized by the power supply voltage stabilizing module 14, it supplies power to the main control board 21 to ensure the power supply of the whole device. The back of the solar panel 13 is connected to the solar panel 13 by screws (not shown in FIG. 1 ) with the upper end of the fixing rod 16 , and the lower end of the fixing rod 16 is directly inserted into the earth 17 for fixing the solar panel 13 . The storage battery 11, the charging control module 12 and the power supply voltage stabilization module 14 are all packed into the control box 18 to prevent external wind, rain and radiation from affecting its performance.

The main control system 20 shown in Figure 1 includes a main control board 21, a signal input module group 22, a main control chip 23, a display chip 24, a wireless communication module 25, a liquid crystal display screen 26, buttons 27, a signal output module group 28, Antenna 29 and fixed pole 16. The main control board 21 is the control center of the present invention, and is integrated with a power supply voltage stabilizing module 14, a signal input module group 22, a main control chip 23, a display chip 24, a wireless communication module 25 and a signal output module group 28, and each module is responsible for corresponding Functional actions, wherein the main control chip is responsible for controlling the work of all other components on the main control board 21 . The power supply voltage stabilization module 14 is used to maintain the stability of the entire system voltage supplied by the storage battery 13 . The signal input module group 22 is used to receive the signals of all external probes. The signal output module group 28 is that the main control board sends execution commands to external action parts through this module. The display chip 24 is connected with the liquid crystal display 26 through the electric wire 15, and is used for displaying the state of the system, and the operation of the main control system can be controlled through the operation of the key 27. The wireless communication module 25 and the antenna 29 constitute a remote transmitting and receiving communication system, which can not only wirelessly transmit the status and data of the system, but also receive signals sent by a remote host to realize remote parameter setting, status query and control operation. The signal output module group 28 is connected to each function executing component by using the wire 15, and outputs control commands to make each functional component work together to realize automatic gas collection. In the main control system 20, except that the antenna 29 is outside the control box 18, all the other components are installed in the waterproof control box 18. The control box 18 is connected with the fixed rod 16 by screws, and is inserted into the ground 17 by the fixed rod 16 to fix.

The automatic static box 30 shown in Figure 1 comprises a main frame 31, a polycarbonate plate 32, a base 33, an air temperature probe 34, a radiation shield 35, an air humidity probe 36, a soil temperature probe 37, a soil moisture probe 38 and a fan 39. The main frame 31 is seamlessly welded by stainless steel rods to form a cylindrical frame, and the sides and top of the cylindrical main frame 31 are respectively covered with polycarbonate plates 32, and the polycarbonate plates 32 are fixed with screws (not shown in Fig. 1 ). on the main frame and seal with transparent sealant. An air temperature probe 34 and an air humidity probe 36 are suspended inside the main frame 31, wherein a radiation shield 35 is installed on the top of the air temperature probe to prevent solar radiation from affecting temperature measurement. The structural diagram of the base 33 of the static box is shown in Figure 2. The inside of the base 33 is a cylindrical stainless steel tube, the lower end of which is inserted into the earth 17, and a ring-shaped stainless steel plate is welded vertically and seamlessly in the middle of the inner cylindrical tube of the base 33. , and then vertically seamlessly weld a cylindrical stainless steel tube on the outer edge of the welded cylindrical plate, and the height of this cylindrical tube will be lower than the height of the inner cylindrical tube of the base 33, so that the outer cylindrical tube of the base 33, The circular stainless steel plate inner cylindrical tube is seamlessly welded to form a water tank 47 with a low outside and a high inside, and the outer diameter of the main frame 31 after covering the polycarbonate plate 32 is larger than the inner diameter of the water tank 47 and smaller than the outer diameter of the water tank 47. The bottom of the main frame 31 of the automatic static case 30 vertically drops in the water tank 47, and when the water tank 47 is full of water, the automatic static case internal air can be sealed and isolated from the external air. Plants 331 are planted on the upper part of the base 33 , and a soil temperature probe 37 and a soil moisture probe 38 are embedded in the lower part of the base 33 . A fan 39 is also housed at the top inside the automatic static box, which is used to mix the gas in the box when measuring.

The water sealing system 40 shown in FIG. 1 includes a shelf 41 , a water tank 42 , a solenoid valve 43 , a water pipe 44 , a fixing screw 45 , a water level switch 46 and a water tank 47 . The shelf 41 is a stainless steel plate that is bent at a right angle of 90 degrees, and is fixed on the base 33 with screws (not shown in Fig. 1 ). 42 is connected with the electromagnetic valve 43 and the electromagnetic valve 43 and the water tank 47, and a water level switch 46 is also installed in the water tank 47. When water injection is required, the electromagnetic valve 43 is opened, and the water in the water tank 42 passes through the water pipe 44 and the electromagnetic valve 43 Inject in the water tank 47, after the water injection reaches the setting value of the water level switch 46, the main control board 21 will send an instruction to close the electromagnetic valve 43 and stop the water injection.

The automatic static box lifting system 50 as shown in Figure 1 comprises guiding support pipe 51, direct current reduction motor 52, lifting arm 53, screw mandrel 54, slide block 55, base 56, guide groove 57, magnetic induction probe 58, magnet 59 and Fixed rod 16. The guide support pipe 51 is a section of thick-walled stainless steel pipe, and a fixed plate is welded on the top of the pipe, which is used to fix the DC gear motor 52 with the fixing screw 45. There is a guide groove on the side of the guide support pipe 51 facing the automatic static box 30 57, FIG. 3 is a partial enlarged view of the guide groove 57, as shown in FIG. Also fixed with a magnetic induction switch 58, there is a section of screw mandrel 54 at the inner shaft center of the guide support tube 51, and there is a circular hole in the center of the upper part of the screw mandrel 54. The shaft of the DC geared motor 52 can extend into the inside of the screw mandrel 54, and both use fixing screws 45 is connected, on the screw mandrel 54 is worn with two supporting cylindrical slide blocks 55, and the thread at the center of the slide block 55 is matched with the screw thread on the screw mandrel 54. Lifting arm 53 is to be welded into the shape shown in Fig. 1 by two parallel stainless steel solid bars and a vertical stainless steel solid bar, and one end of lifting arm is fixed on the main frame 31 of automatic static box 30 with screw, and the other One end passes through the guide groove 57 and uses a screw (not shown in Fig. 1 ) to be connected with the upper and lower sliders 55 . A cylindrical magnet 59 is also perforated and buried on the lower slider. The guide support pipe 51 is welded on a stainless steel base 56. There are two fixing holes on the base 56. The fixing column 16 is used to nail into the ground 17 to fix the automatic static box lifting system 50 on the ground. The lifting of the automatic static box 30 drives the slider 55 to move through the rotation of the DC gear motor 52. Since the lifting arm 53 can only move in the guide groove 57, the slider 55 drives the lifting arm 53 and the connected automatic static box main frame 31 to move together. , when the slide block 55 rose to the top of the guide groove, due to the simultaneous deflection of the guide groove 571 and the guide groove 572, the automatic static box 30 was driven to deflect in the same direction, which can reduce the influence of the shading of the automatic static box on the growth of the measured plants. The magnet fixed on the slide block 55 and the magnetic induction probe fixed on the outside of the guide support tube 51 can make the system detect the degree in place of the automatic static box lifting.

The gas collection system 60 shown in Figure 1 includes a base plate 61, a gas pipe 62, a gas collection pump 63, a gas return solenoid valve 64, a channel selection solenoid valve 65, a needle seat 66, a sealing ring 67, an inner gas collection needle 68, and an outer gas collection needle. Needle 69 and side hole 681. The gas extraction pump 63, the gas return electromagnetic valve 64 and the passage selection electromagnetic valve 65 all use fixing screws 45 to be fixed on the base plate 61, and there are holes on the base plate 61 for two air pipes 62 to pass through and pass into the center of the needle seat 66. The gas in the automatic static box 30 enters from the trachea 62 that extends into it, is pumped by the gas extraction pump 63 and delivered to the return air solenoid valve 64 through the outlet air pipe 62, and the return air solenoid valve 64 is a two-position three-way solenoid valve. When it was not energized and was in the closed state, the air inlet on the left side communicated with the top air outlet, and the gas could be returned to the airtight automatic static box 30 by connecting the air pipe at the top outlet, so that it could be used in the automatic static box 30 to be collected. The function of the used air pipe 62 for flushing the gas collection with the gas is to ensure that the extracted gas is close to the gas in the automatic static box 30 to the greatest extent. When the gas return solenoid valve 64 is opened, the outlet on the top is closed, and the gas outlet on the right side is opened simultaneously, and the gas in the air pipe 62 is extracted by the gas extraction pump 63 and delivered to the channel selection solenoid valve 65. The structure of the channel selection solenoid valve 65 is similar to that of the return gas. Solenoid valve 64 is similar, when it is not energized and closed, the left air inlet communicates with the top air outlet, when it is energized and opened, the left air inlet only communicates with the right air outlet, and the main control board 21 can open or close this valve. Select different gas passages to deliver the gas to the hollow inner gas sampling needle 68 or outer gas sampling needle 69. There is a circular side hole 681 on the side of the inner gas sampling needle 68 or the outer gas sampling needle 69 near the needle tip, which can prevent the gas from entering. When the needle is needled, debris from the seal seal clogs the needle. The needle base 66 can be fixed on the needle insertion slider 73 with the fixing screw 45. Fig. 4 shows its cross-sectional view. There is a screw hole 661 through which the fixing screw 45 can pass on the left and right sides, and there is a screw hole 661 in the center of the needle base. The air inlet pipe hole 662 for the air pipe 62 to pass through, the lower part of the needle seat 66 has threads for connecting needles, as shown in Figure 1, both the inner gas collection needle 68 and the outer gas collection needle 69 have threads inside and can be screwed on the needle seat 66, after the trachea 62 passes through the needle seat 66, an "O"-shaped sealing ring 67 is sleeved, and when the inner gas collection needle 68 or the outer gas collection needle 69 is tightened with the needle seat 66, the "O"-shaped sealing ring 67 is pressed , Ensure that there is no air leakage between the needle seat 66, the trachea 62 and the outer gas sampling needle 68 or the inner gas sampling needle 69.

The gas injection system 70 shown in Figure 1 comprises a needle motor 71, a fixing screw 45, a needle screw 72, a needle slider 73, a guide rod 74, a probe fixing plate 75, a locking screw 76, a magnetic induction probe 58 and magnet59. Fig. 1 has shown two sets of gas injection systems 70, and the structure of the gas injection system 70 near the center will be introduced now. The needle insertion motor 71 is fixed on the base plate 61 with fixing screws 45, and the shaft of the needle insertion motor 71 passes through the base plate 61. There is a needle feed screw 72 below the needle feed motor 71, and there is a circular hole radially at the top center of the needle feed screw 72. The shaft of the needle feed motor 71 extends into the central circular hole of the needle feed screw 72. And fix it with set screw 45. A cylindrical needle-introducing slider 73 is pierced on the needle-introducing screw rod 72. FIG. 5 shows a top view of the needle-introducing slider. On the left side of the block, there is a needle seat groove 732 for fixing the needle seat 66. In the needle seat groove 732, there is a needle seat hole 733 and two needle seat fixing threaded holes 734. The needle seat 66 can be installed on the needle insertion slider 73. And fix it with set screw 45. There is a guide hole 735 on the right side of the needle insertion slider 73, through which the guide rod 74 can be passed for guidance, and a magnet 59 is buried on the far right side of the needle insertion slider 73 for sensing the position of the needle. The installation of the guide rod is shown in FIG. 1 , the end of which is inserted into the base plate 61 in an interference fit manner, perpendicular to the base plate 61 and passing through the guide hole 735 of the needle insertion slider 73 . There is a probe fixing plate 75 on the side of the guide rod 74. The probe fixing plate is bent and placed vertically at a right angle of 90 degrees. The side parallel to the base plate 61 is fixed on the base plate 61 by fixing screws 45, so that the vertically placed side is in line with the base plate 61. The guide rods 74 are parallel. When the needle motor 71 rotates to drive the needle feed screw 72 to rotate, due to the guiding effect of the guide rod 73, the needle feed slider 73 moves linearly on the needle feed screw 72. When the needle feed slider 73 is transported to the uppermost or lower end of the needle screw rod 72, and at the place facing the magnet 59 above it, use strong glue to bond a magnetic induction probe on the probe fixing plate 74 to sense the slippage of the needle. Whether block moves in place, thereby can indicate whether the needle head on the needle seat 66 that is fixed on the needle advancing slide block 73 moves in place. A locking screw 76 is also threadedly fixed at the end of the needle feeding screw 72 to prevent the needle feeding slider 73 from rotating and slipping out of the needle feeding screw 72 .

The positioning system 80 shown in Figure 1 includes a positioning motor 81, a central shaft 82, a slot 83, a bayonet pin 84, a bearing 85, a nut 86, a positioning screw 87, a bottom cover 88, a magnetic induction probe 58, a magnet 59, and a foot pad 89 And fixing screw 45. The positioning motor 81 is fixed on the outer cover 98 with the fixing screw 45 to provide power for the rotation and positioning. The shaft of positioning motor 81 extends into the inside of central shaft 82, and there is a small hole in the motor shaft radial direction of positioning motor 81, and a cylindrical bayonet pin 84 can be interference-fitted through the motor shaft, so that bayonet pin 84 is perpendicular to the motor shaft. axis. Figure 6 shows the top view of the central shaft 82. There is a round hole 821 in the center of the top of the central shaft 82, and the motor shaft of the positioning motor 81 can extend into it. There is also a long slot 83 connected to the central round hole 821. Align the motor shaft with the round hole 821, align the bayonet pin 84 with the secondary bay 83, and then the positioning motor 81 and the central shaft 82 can be snapped together. 7 shows a top view of the bottom end of the central shaft 82. There is a bearing 85 at the center of the bottom end of the central shaft 82, and a screw hole 822 for fixing is respectively arranged on both sides of the bearing 85. The central shaft 82 passes through the lower plate 93 and is fixed on the lower plate 93 by two fixing screws 45 . There is a bottom cover 88 at the maximum end of the central axis 82. The bottom cover 88 is a circular threaded cover with a threaded hole in the center. On the bottom cover 88, a foot pad 89 is fixed by bonding, so that the bottom cover 88 can stand on the ground. After a set screw 87 passes through the threaded hole in the center of the bottom cover 88, it is locked with a nut 86, and then passes through the lower plate 93 and stretches into the center hole of the bearing 85.

The sample collecting system 90 as shown in FIG. The top view of the upper plate 91 of the sample plate is shown in Figure 8. There are two circles of gas cylinder holes 911 evenly distributed in a circumferential manner on the plate. The inner circle of the upper plate 91 of the present invention has 6 gas cylinder holes 911, and the outer circle has 12 gas cylinder holes. 911, a cylindrical magnet 59 is buried at the intersection of the extension line connected to the center of each gas cylinder hole 911 at the center of the upper plate 91 and the center of each gas cylinder hole 911 and the outer edge of the plate. The connection lines of the bottle holes 911 overlap. In this embodiment, there are 12 outer ring magnets. In addition, there is also a reversely installed magnet 591 on the outer edge of the upper plate, which is used to locate the initial position of the upper plate. On the upper plate 92, there are also Four screw fixing holes 912 have an axis hole 913 for the central axis to pass through in the center. The top view of the middle plate 92 is shown in Figure 9, and its main difference from the upper plate 91 is that there are no embedded magnets 59 and reverse magnets 591, and the plate is also divided into inner and outer circles and evenly distributed with gas cylinder holes 921, screw fixing holes 922 and Axle hole 913. The top view of the lower plate 93 is shown in Figure 10. The difference from the middle plate 92 is that there is no cylinder hole, two screw fixing holes 931 are added, the axis hole 933 becomes smaller, and the relative position of the screw fixing hole 932 is the same as that of the middle plate 92. Consistent with above. As shown in Figure 1, the connection of the upper plate 91, the middle plate 92 and the lower plate 93 adopts studs 96 and hollow pipes 97, and the fixing screws 45 pass under the fixing screw holes 932 of the lower plate 93, and then pass through The hollow tube 97 and the fixing screw hole 922 of the middle plate 92 are screwed into the stud 96, and the other fixing screw 45 is screwed into the stud 96 after passing through the fixing screw hole 912 on the upper plate 91. , the corresponding four screw holes of the upper plate 91, the middle plate 92 and the lower plate 93 are connected in this way to form a complete sample plate 99, and then the central axis 82 is penetrated from the axis hole 913 of the upper plate 91, and then After passing through the axis hole 922 of the middle plate 92, it is in close contact with the lower plate 93, and then the fixing screw 45 is passed through the lower screw fixing hole 931 of the lower plate 93 and then screwed into the screw fixing hole 822 of the central axis 82, and the sample Disc 99 is connected to central shaft 82 . A screw-top gas cylinder 94 is placed in the gas cylinder hole 911 of the sample tray 99, and a sealing cover 95 is screwed on the screw-top gas cylinder 94. Fig. 11 is a cross-sectional view of the sealing cover 95, and there is a disc-shaped rubber gasket for sealing in the sealing cover 951, the center of the bottle cap has a round hole 952 for the needle 68 to pass through, the sealing cap 95 adopts thread 951 to link to each other with the screw gas cylinder 94, after the sealing cap 95 is tightened, the rubber pad 951 can guarantee the sealing of the gas cylinder 94. As shown in Figure 1, there is an outer cover 98 on the top of the chassis 88, the outer cover 98 is made of transparent plastic, and is in the shape of a large screw bottle with an inverted cylindrical shape. The head studs 66 and the fixing screws 45 are connected to the base plate 61, and the outer cover 98 and the base plate 61 are connected and fixed by at least three studs 66 to ensure a firm connection. At the position where the inner wall of the outer cover 98 faces one of the magnets 59 and the counter magnet 591 of the upper disk 91 , a magnetic induction probe 58 is respectively bonded to sense the rotational position of the sample disk 99 . The positioning mode of the sample bottle 94 is: use the positioning motor 81 to provide power to rotate the central axis 82 clockwise, the central axis 82 drives the sample plate 99 fixed on its bottom to rotate clockwise together, when the reverse magnet 591 on the upper plate 91 rotates to When the corresponding position of the magnetic induction probe 58 fixed on the outer cover is set, the main control system 20 sets it as the initial position, the number of the gas cylinder is set to 0, and then the sample plate continues to rotate clockwise. When a magnet 59 corresponds to the magnetic induction probe, the gas cylinder 94 on the inner or outer ring of the corresponding sample tray 99 is just turned to the top of the injection needle 68 for positioning to prepare for gas collection. Every time the sample tray rotates a magnet 58 position, the counting of the gas cylinders 94 on the inner or outer ring of the sample tray 99 will increase by one bottle position. Start repositioning count.

The assembly and functional implementation of the various functional parts of the present invention have been described above, and the overall cooperative implementation of the present invention will now be described in conjunction with FIG. 1 and FIG. 12 . After the above-mentioned parts are installed according to the mode of FIG. The signal input module group 22 is connected to the main control board 21, and the fan 39, solenoid valve 43, DC gear motor 52, air return solenoid valve 64, channel selection solenoid valve 65, needle-feeding motor 71 and positioning motor 81 are connected to the signal output module group 28 is connected to the main control board 21, so that the main control system can control all electric components of the device of the present invention.

As shown in the work flow chart in Figure 12, when the power supply system 10 supplies power to the main control system 20, the main control system 20 performs a power-on self-test to detect whether each component of the system is normal, and resets each component of the system. If the test fails, an error message will be displayed on the LCD screen and the error message will be sent through the wireless module; if the power-on self-test passes, the sampler needs to set the sampling parameters, which can be set through the wireless transmission of the remote terminal , can also be set through the onboard button 27; when the sampling parameters are set, you can issue a running command through the remote terminal or the button to start the automatic sampling process. At this time, the sampler is in a ready state waiting for the sampling time to arrive In this process, setting or action instructions can be received; when the time reaches the set sampling time, the sampler enters the sampling process, as shown in Figure 1, the main control system 20 of the sampler sends a cover box command to the static box 30, Power the DC geared motor 52 so that the motor shaft drives the screw rod 54 to rotate, and the screw rod 54 drives the slide block 55 to make a linear downward motion under the action of the guide groove 57, and the lifting arm 53 connected with the slide block 55 carries the static box main frame 31 Make a linear downward movement together until the magnet 59 on the slider is sensed by the magnetic induction probe 58 fixed on the bottom of the support tube 51 and then stops. Action; open solenoid valve 43 now, the water in the water tank 42 flows in the water tank 47 through water pipe 44, when the water level in the water tank 47 indicated by the water level switch 46 has reached the preset height, the water in the water tank 47 will be static tank main The frame 31 is sealed with the base 33, and at this moment, the electromagnetic valve 43 is closed to cut off the injection of water, and the sealing action of adding water is completed; then the main control system turns on the fan 39, mixes the gas in the automatic static box 30, and then turns on the gas extraction pump 63, The gas in the static box 30 is extracted by the gas extraction pump 63 through the air pipe 62, and then returned to the automatic static box 30 by the air pipe 62 through the top outlet of the air return solenoid valve 64. The main purpose of this process is to use the gas in the automatic static box to flush the gas collection process. pipeline to reduce the impact of residual gas in the pipeline on gas production; after cleaning the pipeline, the system opens the gas return solenoid valve 64, so that the gas flows out from the right side of the gas return solenoid valve 64 and enters the channel selection solenoid valve 65. It is necessary to open or close the channel selection valve for gas, so that the air flow reaches the inner gas sampling needle 68 or the outer gas sampling needle 69. The effect of this process is to flush the gas sampling needle and its connecting pipes with the airflow from the automatic static box 30 to ensure The purity of gas extraction; then the main control system 20 controls the positioning of the sample bottle, and the process is that the positioning motor 81 rotates and drives the connected central axis 82 and the upper plate 91, the middle plate 92, and the lower plate 93 of the sample plate to rotate together, and the gas cylinder 94 is placed on the sample plate and rotates together. There are magnets 59 and reverse installation magnets 591 distributed on the outer edge of the upper plate. The reverse installation magnets are used to indicate the initial position of the sample plate, and the magnet 59 is used to indicate that the sample plate is corresponding to The position of the bottle position, when the sample plate rotates to the corresponding bottle position, the corresponding magnet When 59 is sensed by the magnetic induction probe, it stops rotating, and the inner gas sampling needle 68 or the outer gas sampling needle 69 also stops above the gas cylinder 94 to be collected to complete the bottle positioning action; The process is that after the flushing of the needle and the corresponding pipeline is completed, the needle-introduction motor 71 rotates to drive the needle-introduction screw 72, the needle-introduction screw 72 drives the needle-introduction slider 73, and the needle-introduction slider 73 slides on the guide rod 74, driving the connected The inner gas sampling needle 68 or the outer gas sampling needle 69 moves downward, and the needle pierces the rubber pad 951 of the sealing cap 95 of the gas cylinder 94 that has been evacuated below, and inserts it into the vacuum gas cylinder 94. The rubber pad 951 acts on the elasticity Hold the needle tightly to seal the needle with the rubber pad 951. When the magnet 59 of the needle insertion slider 73 is detected by the magnetic induction probe 58 at the bottom of the probe fixing plate 75, stop the needle insertion. The gas in 30 is pressed into the gas cylinder 94 to collect gas through the gas pipe 62, the gas return solenoid valve 64, the channel selection solenoid valve 65 and the needle side hole 681; then the gas collection action at the current sampling point is completed. There are four actions of the needle, closing the gas extraction pump 63, closing the electromagnetic valve 64, and closing the fan 39. The action of withdrawing the needle is opposite to that of inserting the needle. The inner gas sampling needle 68 or the outer gas sampling needle 69 connected to it moves upwards, the needle is pulled out from the gas cylinder 94, and stops when the magnet 59 of the needle insertion slider 73 is detected by the magnetic induction probe 58 on the upper part of the probe fixing plate 75 movement to complete the needle withdrawal action; immediately after the needle withdrawal action is completed, the main control system 20 controls to close the gas extraction pump 63, the air return solenoid valve 64 and the fan 39, and then records the system status data during gas extraction to complete the first step. In order to determine the accuracy of the gas flux in the gas collection process of each sampling point, generally 4 to 5 points are collected when the box is closed; then the main control system 20 judges whether the sampling point is over, if not, the system enters Waiting for the state of the next sampling point time, when the time of the next sampling point is reached, the system will perform gas sampling from the process of turning on the fan 39 to closing the fan 39 as shown in Figure 1; when the last sampling point is over, the main The control system opens the automatic static box 30, and its action flow is opposite to that of the cover box. The main control system 20 of the sampler energizes the DC gear motor 52 in reverse, so that the motor shaft drives the screw rod 54 to rotate counterclockwise, and the screw rod 54 drives the slider. 55. The lifting arm 53 and the main frame 31 of the static box make a straight-line upward movement under the guidance of the guide groove 57. When the magnet 59 on the slider 55 is sensed by the magnetic induction probe 58 fixed on the top of the support tube 51, it stops, and the automatic static Box 30 is fully opened; after static box main frame 31 is opened, master control system checks whether all sampling tasks of setting are finished, if not finished, then system enters the state of waiting for next sampling time, if all sampling tasks have finished, system just Complete the entire sampling process, enter the standby state, and prepare to receive new sampling commands; in the virtual frame part of the flow chart shown in Figure 12, if an error occurs during the sampling process , the main control system will stop sampling, return to the initial state of sampling, report error information on the screen, and send an error information report through wireless remote.

The present invention is designed for the automatic monitoring of the flux of greenhouse gases, and the automatic static box may not be connected, and the actions related to the automatic static box 30 are not executed in the program, and the gas in the atmospheric environment is directly collected, which can be used in any atmosphere Automatic collection of gas samples in environmental monitoring.

Claims (3)

1. an automatic static box lifting system for an automatic gas sample collection station, the automatic gas sample collection station includes an automatic static box and an automatic static box lifting system for collecting gas, characterized in that: The automatic static box includes a fixed base and a liftable main frame relative to the base; The automatic static box lifting system includes a guide support tube, a DC geared motor, a lifting arm, a lead screw, a slider, a base and a guide groove. The guide support tube is a tubular member fixed on the base, and it faces the automatic static box. The side of the box is provided with guide grooves, and the upper part of the guide grooves is provided with two obliquely upward deflection grooves. The inner axis of the guide support tube is provided with a screw rod with external threads, and the upper end of the screw rod is connected with the output shaft of the DC gear motor. , two sliders with internal threads are set on the screw rod, the slider is connected to one end of the lifting arm passing through the guide groove, and the other end of the lifting arm is connected to the main frame of the automatic static box; the sliding in the guide groove When the slider is lifted to the position where the deflection groove is located, the slider deflects toward the direction of the deflection groove, and a magnet is fixed on the slider, and the lower starting end of the guide groove and the outside of the guide support tube below the deflection groove are provided with The magnetic induction probe can detect the movement and deflection position of the slider. 2. The automatic static box lifting system according to claim 1, wherein the lifting arm comprises two parallel horizontal solid rods and a vertical solid rod connected in the middle of the two horizontal solid rods, the two horizontal solid rods A transverse solid rod connects the two sliders respectively. 3. The automatic static box lifting system according to claim 1, characterized in that the distance between the two sliding blocks on the outside of the screw rod and the two deflection grooves is equal.