CN211855831U - Air supply and calibration device for pneumatic valve calibration - Google Patents

Abstract

The utility model discloses an air feeder for pneumatic valve check-up relates to valve debugging and overhauls the field, air feeder includes pressure input pipeline subassembly, relief pressure valve, pointer type manometer, electronic pressure meter and change over switch, and pressure input pipeline subassembly connects relief pressure valve one end, the other end connection pressure output pipeline of relief pressure valve connects gradually pointer type manometer and electronic pressure meter on the pressure output pipeline, and change over switch sets up on the gas outlet channel of electronic pressure meter, be used for when the atmospheric pressure in pressure input pipeline subassembly air feed route is insufficient, close the relief pressure valve, communicate electronic pressure meter to pressure output pipeline's air feed route, through electronic pressure meter supplies air to pneumatic valve check-up. The device is simple to operate, small in size and light in weight, and an internal element provides an air source under the condition that no air source exists on site so that the pneumatic valve can still be verified. Furthermore, the utility model also provides a calibration equipment including this air feeder.

Description

Air supply and calibration device for pneumatic valve calibration

technical field

The utility model relates to the field of valve debugging and maintenance, in particular to an air supply device and a calibration device for pneumatic valve calibration.

Background technique

Pneumatic valves are widely used in important systems such as RCP/RCV/RIS/ASG in nuclear power plants. They are important equipment for automatic control and automatic adjustment, and are also an important guarantee for the safe, stable and economical operation of units. In the pneumatic valve, the standard air pressure signal is passed into the membrane air chamber, and a downward thrust is generated on the membrane, which drives the valve stem member to move downward, the valve is closed, the spring is compressed, and an upward reaction force is generated on the membrane. eventually reach the equilibrium position. In the process of debugging and maintenance of pneumatic valves, the measurement of stroke adjustment, BS value (BENCH SET: the valve stem starts to move to the valve fully closed, the air pressure range required to overcome the spring reaction force) and the measurement of the operating range are the most common tasks. Traditional debugging and maintenance The plan needs to find the available gas source for SAT/SAR on site, configure suitable joints and measuring instruments, which is time-consuming and labor-intensive, and the tools are complicated, which cannot be implemented when the on-site gas source is unavailable.

In the process of pneumatic valve calibration, stroke adjustment, measurement of BS value and operating range are the most common tasks. The pressure of the current pneumatic valve calibration process is provided by the air pressure of the available SAT/SAR air source on site, and the appropriate joints and Measuring instruments to realize the inspection of pneumatic valves, which are time-consuming and labor-intensive, and the tools are complex, and cannot be implemented when the on-site air source is unavailable; or, purchase imported complete sets of calibration tools FLOWSCANNER, with mature technology, valve stroke adjustment, BS value and operating range. The measurement can be easily measured, but the purchase cost is high, the maintenance cost is high and inconvenient, and because it is imported equipment, it is controlled by others.

Utility model content

In order to solve the problem that the gas supply device cannot supply the gas with the required air pressure for the pneumatic valve verification when there is no gas source supply on site, the utility model provides a multi-channel gas supply and can improve the verification accuracy and efficiency of the pneumatic valve. Air supply device and calibration device for pneumatic valve calibration.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is as follows:

An air supply device for pneumatic valve calibration, comprising a pressure input pipeline assembly, a pressure reducing valve, a pointer pressure gauge, an electronic pressure gauge, a pressure output pipeline and a switch, wherein the pressure input pipeline assembly is connected to the The input end of the pressure reducing valve, and the output end of the pressure reducing valve is connected to the pressure output pipeline; the pressure output pipeline is sequentially connected with a pointer pressure gauge and an electronic pressure gauge for jointly monitoring the test air pressure from different gas supply paths; switching The switch is arranged on the air outlet channel of the electronic pressure gauge, and is used to close the pressure reducing valve when the air pressure connected to the air supply path of the pressure input pipeline assembly is insufficient, and connect the electronic pressure gauge to the pressure output pipeline. Air supply path, through the electronic pressure gauge for air supply to pneumatic valve verification.

The utility model provides an air supply device for pneumatic valve verification. The electronic pressure gauge comprises: a casing with an accommodating space inside, a suction pump fixedly connected in the accommodating space of the casing, and a suction pump arranged in The regulating valve on the air inlet pipeline; the switch is connected to the exhaust port of the air suction pump, and is used for connecting the air suction pump and the pressure output pipeline when the air pressure of the air supply path of the pressure input pipeline assembly is insufficient. The air path is checked by the air pump to the pneumatic valve.

The utility model provides an air supply device for pneumatic valve calibration, wherein the electronic pressure gauge further comprises a fine-tuning knob rotatably connected to the casing, and the fine-tuning knob is used to adjust the opening of the regulating valve.

The utility model provides an air supply device for pneumatic valve verification, wherein a display is further arranged on the casing to display the air supply pressure value.

The utility model provides an air supply device for pneumatic valve verification. One end of the switch handle of the switch switch is movably connected to the casing, and the other end of the switch handle is a free end, which is used to realize the switch switch. control.

The utility model provides an air supply device for pneumatic valve calibration. The electronic pressure gauge further includes a pressure detection part and a controller connected with the pressure detection part, and the controller is also electrically connected to the air pump, A regulating valve, a pressure reducing valve, a switch and a display screen; the switch is also used to close the exhaust port, stop the air pump when the air pressure of the air supply path of the pressure input pipeline assembly is normal, and use The control of the air pump, the regulating valve, the pressure reducing valve and the switch is displayed on the display.

The utility model provides an air supply device for pneumatic valve calibration, wherein a PCB circuit board is also fixedly connected in the casing, and the controller is arranged on the PCB circuit board to reduce the volume of the internal control circuit and realize integrated control .

The utility model provides an air supply device for pneumatic valve verification, further comprising an exhaust valve arranged on the pressure output pipeline and used for pressure relief, which is used to discharge the air from the air supply device after the verification is completed. gas.

The utility model provides an air supply device for pneumatic valve verification, wherein the exhaust valve is connected to a branch pipeline of the pressure output pipeline, and the end of the branch pipeline away from the connection of the exhaust valve is connected to atmosphere.

On the other hand, the present invention also provides a pneumatic valve calibration device, which includes one of the above air supply devices, the air supply device is connected with the pneumatic valve, and is used to realize the calibration of the pneumatic valve.

The beneficial effects brought by the technical solutions provided by the embodiments of the present utility model:

Accurate measurement and quick adjustment of the BENCH SET value and operating range of the pneumatic valve are realized, which avoids the potential risk of the unit control caused by the valve internal leakage or the switch not being in place due to the inappropriate spring force of the valve.

Through the use of the device, manual pressing from the pneumatic actuator joint can be realized, and the maintenance personnel can be assisted in the disassembly and assembly of the pneumatic actuator and the adjustment of the valve stroke.

It is light in weight, small in size, easy to carry, easy to use, and does not require a compressed air source. It can realize the calibration of pneumatic valves without a compressed air source on site, and create favorable conditions for the advancement of the project progress.

For the first time, the pointer pressure gauge and the electronic digital display pressure gauge are used to check each other, and the measured data is more reliable, which ensures the quality reliability of the pneumatic valve calibration.

The development cost of this device is less than 20,000 yuan, which greatly reduces the cost of purchasing special tools for pneumatic control valve calibration (currently, the purchase price of a set of FLOWSCANNER is nearly 1 million yuan).

Description of drawings

FIG. 1 is a schematic structural diagram of a pneumatic valve of the pneumatic valve verification device provided in the first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of the pneumatic valve air supply device according to the first embodiment of the present invention.

3 is a schematic structural diagram of the pressure input pipeline assembly and the pressure output pipeline of the pneumatic valve air supply device according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram of the pipeline structure inside the electronic pressure gauge of the pneumatic valve air supply device according to the first embodiment of the present invention.

5 is a schematic diagram of the connection of the electronic pressure gauge of the pneumatic valve air supply device according to the first embodiment of the present invention.

6 is a schematic diagram of the external structure of the electronic pressure gauge of the pneumatic valve air supply device according to the first embodiment of the present invention.

Reference numerals: 1-pressure input line assembly; 2-pressure reducing valve; 3-pointer pressure gauge; 4-electronic pressure gauge; 5-exhaust valve; 6-pressure output line; 100-first hose; 101 -1st gas pipe; 400-shell; 401-air pump; 402-regulating valve; 403-switch; 404-fine adjustment knob; 405-switch handle; 406-pressure detection part; 407-display; 601-second gas pipe ;602-second hose;701-stroke pointer;702-stroke scale;703-valve seat;704-spool;705-seal packing;706-stem;707-push rod;708-spring;709-diaphragm Lower chamber; 710 - diaphragm; 711 - upper chamber of membrane chamber.

Detailed ways

In order to solve the problem that the pressure of the pneumatic valve calibration process in the prior art is provided by the air pressure of the available air source of the SAT/SAR on site, appropriate joints and measuring instruments are configured to realize the inspection of the pneumatic valve, which is time-consuming and laborious, and the tools are complicated. In the case where it cannot be implemented when it is unavailable, the utility model aims to provide an air supply device and a calibration device for pneumatic valve calibration. The core idea is to provide a portable air supply device that uses air as an air source, and The multi-path gas supply method, when the on-site gas source is available, is connected to the on-site SAR/SAT gas source connector through the pressure input pipeline assembly, and the pressure is reduced through the pressure reducing valve, and the pointer pressure gauge and the electronic pressure gauge are read together. After decompression, the pressure is compared, and finally the pressure signal inlet of the pneumatic head of the pneumatic valve is supplied through the pressure output pipeline. Figure 1 is an application scenario of the present invention. The portable air supply device is connected to the pneumatic head pressure signal inlet of the pneumatic valve. Two air supply channels, that is, whether there is an air source on site or not, can provide air source for the pneumatic valve, and the pointer pressure gauge and the electronic digital display pressure gauge set on the pressure output pipeline are checked with each other to make the measured data. It is more reliable and ensures the quality reliability of pneumatic valve calibration. And a structure for extracting air to pressurize the air supply device is arranged in the electronic pressure gauge. The technical scheme of the utility model simplifies the structure of the gas supply device, improves the efficiency and reduces the cost; provides a portable gas source, solves the typical problem that the lack of gas source cannot be verified on site, and avoids the problem of equipment space. difficult to operate on site.

The present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model, and are not intended to limit the present utility model.

Example 1:

The utility model provides an air supply device for pneumatic valve calibration, which is used for multi-channel air supply for pneumatic valve calibration. See Figure 2 and Figure 4 for the air supply device. The air supply device for pneumatic valve verification includes pressure input pipeline assembly 1 , pressure reducing valve 2 , pointer pressure gauge 3 , electronic pressure gauge 4 , pressure output pipeline 6 and switch 403 . The pressure input pipeline assembly 1 is sealed and connected to the input end of the pressure reducing valve 2 , and the output end of the pressure reducing valve 2 is sealed and connected to the pressure output pipeline 6 . The pressure output pipeline 6 is sequentially connected with a pointer pressure gauge 3 and an electronic pressure gauge 4 for jointly monitoring the test air pressure from different gas supply paths, and the order in which the pressure output pipeline is connected can be changed. The pressure reducing valve 2 can adjust the opening of the valve according to the displayed readings of the pointer pressure gauge 3 and the electronic pressure gauge 4. The switch 403 is arranged on the air outlet channel of the electronic pressure gauge 4 (see FIG. 4 ), and is used to close the pressure reducing valve 2 when the air pressure connected to the air supply path of the pressure input pipeline assembly 1 is insufficient, and connect the electronic pressure gauge 4 to The air supply path of the pressure output pipeline 6 is calibrated from the air supply to the pneumatic valve through the electronic pressure gauge 4, which effectively solves the problem that the calibration cannot be performed without an available air source on site. The pressure input pipeline assembly 1 can also be connected to a universal joint. When the on-site gas source exists, it can be connected to on-site gas sources of different joints to expand the scope of application. For the stability of the airflow, the pressure input pipeline assembly 1 and the pressure output pipeline 6 are provided with flexible fixing devices, such as plastic buckles, to fix the pipelines in a certain position and stabilize the working device and the device in the device. Gas, improve the accuracy of pneumatic valve calibration.

As shown in FIG. 3 , the pressure input line assembly 1 includes a first hose 100 connected to an external air source, a first air pipe 101 connected to the first hose 100 , a pressure reducing valve 2 connected to the first air pipe 101 , and a first air pipe 101 . The air pipe 101 can be a hard pipe; the pressure output line 6 includes a second air pipe 601 connected to the pressure reducing valve 2, and a second hose 602 connected to the second air pipe 601, the second hose 602 is connected to one end of the pneumatic valve, and Pneumatic valve calibration for air supply. The two-stage hose structure is adopted at the air inlet and air outlet, which can be applied to different tortuous application scenarios, and is easy to fold and carry.

As shown in FIG. 4 , the electronic pressure gauge 4 specifically includes: a casing 400 with an accommodating space inside, an air pump 401 fixedly connected in the accommodating space of the casing, and a regulating valve 402 disposed on the air intake pipe of the air suction pump; The switch 403 is connected to the exhaust port of the air pump 401, and is used to close the pressure reducing valve 2 when the air pressure of the air supply path of the pressure input pipeline assembly 1 is insufficient, open the switch 403, and connect the air pump 401 with the pressure output pipeline 6. The air supply path is pumped to the connected pressure output line 6 through the air pump 401, and the pressure output line 6 outputs the pressure gas to the pneumatic valve for verification. The gas supply function of the electronic pressure gauge 4 is realized, and the applicable scope of the gas supply device is improved.

Further referring to FIG. 4 , the electronic pressure gauge 4 further includes a fine-tuning knob 404 rotatably connected to the housing 400 . The air supply device provides the air source. The conventional improvement is to integrate the fine adjustment knob 404 into the outer dial of the electronic pressure gauge 4, so that the operator can control the air supply flow rate of the air supply device. The specific rotatable connection method can be any of the prior art. An implementation manner, which is not particularly limited here.

Further referring to FIG. 6 , a display 407 is also provided on the housing 400 of the electronic pressure gauge 4 for displaying the air supply pressure value. The display form is not limited to numbers, but can also be graphs. The display provides the operator with a more intuitive display of the pressure value, and further, can display the readings of other instruments in the device and the state of the valve, which is convenient for the operator to receive the real-time information of the device.

As shown in FIG. 6 , one end of the switch handle 405 of the switch 403 is movably connected to the housing 400, and the other end of the switch handle 405 is a free end. When the air pressure of the air supply path of the pressure input line assembly 1 is normal, the air outlet can be conveniently closed by switching the handle 405 and the air pump 401 can be stopped from working.

As shown in FIG. 5 , the electronic pressure gauge 4 may further include a pressure detection part 406 and a controller connected to the pressure detection part 406, and the controller is also electrically connected to the air pump 401, the regulating valve 402, the pressure reducing valve 2, The switch 403 and the display 407; the switch 403 is also used to close the exhaust port when the air pressure of the air supply path of the pressure input pipeline assembly 1 is normal, and control the air pump 402 to stop working through the controller, which is convenient for the operator to Each valve switch is controlled centrally.

Further, a PCB circuit board is also fixedly connected in the casing 400, and the controller is arranged on the PCB circuit board. The pressure valve 2 and other instruments and circuits of the valve signal processing and display through the display 407 reduce the volume of the controller and improve the portability of the gas supply device.

As shown in Figure 6, the electronic pressure gauge also includes: an exhaust line for discharging gas to the pressure output line 6; according to the above-mentioned controller, a corresponding number of control knobs can also be provided, and the components controlled by the controller can be controlled by The knob is adjusted and controlled on the panel of the electronic pressure gauge 4, and the control knob can be replaced with other control devices known to those skilled in the art, and the display 407 of the electronic pressure gauge 4 realizes real-time control and display, so that the operator can simultaneously Reception of information in the device and control of the corresponding valve regulator.

Further, in another embodiment of the present invention, an exhaust valve 5 may also be provided on the pressure output line 6. As shown in FIG. 2 and FIG. 3, a second gas pipe 601 of the pressure output line 6 is connected to After the air supply device is used for calibration work, the residual gas in the device is discharged, the device components are protected, and the service life of the device is improved.

2 and 5, the exhaust valve 5 is connected to the branch pipeline of the pressure output pipeline 6, and the end of the branch pipeline far from the pressure output pipeline 6 is connected to the atmosphere, and the residual gas protection device is discharged more quickly. .

Embodiment 2

The second embodiment of the present utility model provides a pneumatic valve calibration device, which is suitable for the air supply device shown in the first embodiment, see FIG. 1 and FIG. 2 .

As shown in Figure 1, the pneumatic valve includes a stroke pointer 701, a stroke scale 702, a valve seat 703, a valve core 704, a sealing packing 705, a valve stem 706, a push rod 707, a spring 708, a lower mode cavity 709, a diaphragm 710 and a diaphragm The upper chamber 711, the working principle of the pneumatic valve: the gas with a certain pressure output from the air supply device enters the upper chamber 711 of the membrane chamber through the pressure signal inlet, and the diaphragm 710 bears the pressure of the gas in the upper chamber 711 of the mode and transmits it to the pusher connected to the diaphragm 710. The rod 707, the push rod 707 receives the pressure and sinks, wherein the spring 708 is used to relieve the pressure on the push rod 707, the push rod 707 sinks to drive the stroke pointer 701 connected to it to sink, and the stroke pointer 701 is formed on the stroke scale 702. The reading is the stroke of the pneumatic valve. The valve stem 706 connected to the push rod 707 sinks as the push rod 707 sinks. The lower end of the valve stem 706 is the valve core 704. After the valve core 704 sinks with the valve stem 706, it is connected to the valve seat. 703 forms a sealing fit to close the pipeline controlled by the pneumatic valve, wherein the sealing packing 705 isolates the interior of the pneumatic valve from the internal space of the pipeline controlled by the pneumatic valve, preventing the pipeline gas from being polluted, and the entire pneumatic valve device realizes the pipeline valve control about air pressure.

The working principle of a pneumatic valve calibration device provided in this embodiment:

1. When the on-site air source is available: close the exhaust valve 5, connect the pressure input line assembly 1 to the on-site SAR/SAT air source connector, reduce the pressure through the pressure reducing valve 2, the pointer pressure gauge 3 and the electronic pressure Gauge 4 jointly reads the pressure after decompression and compares it, and finally supplies the pressure signal inlet of the pneumatic head through the pressure output line 6 (see Figure 1). Mainly complete the following functions:

1) Supply air to keep the pneumatic valve in a half-open state, loosen the coupling, release the air source, and remove the pneumatic actuator;

2) Accurately read the air pressure value of the air supply device at this time, calculate the BS value through the air pressure value, and accordingly, make the pneumatic valve in different opening and closing states, and measure the operating range;

3) Supply air to keep the valve in a half-open state, the pneumatic actuator is controlled by the air pressure signal, loosen the coupling to adjust the stroke: up (the stroke is too large) or down (the stroke is too small).

2. When the on-site air source is unavailable: close the pressure reducing valve 2, press the electronic pressure gauge 4, repeat the above operation, and the pneumatic valve can also be calibrated;

3. After the work is completed, release the pressure through the exhaust valve 5, remove the tool, and complete the calibration of the pneumatic valve.

To sum up, the air supply device and the calibration device for the calibration of the pneumatic valve disclosed in the embodiment of the present invention are simple in structure, have low production cost of the device, and reduce the cost of purchasing special tools for calibration of the pneumatic control valve; There are universal joints, which are suitable for various gas source joints on site; the pointer pressure gauge and the electronic pressure gauge are used to check each other, the measured data is more reliable, and the quality reliability of the pneumatic valve calibration is ensured; the electronic pressure gauge is equipped with a fine-tuning knob, It can reach any pressure value with high accuracy; the electronic pressure gauge integrates the status display and control of each component, which requires easy operation, reduces the number of man-hours required during the calibration of the pneumatic valve, reduces labor costs, and improves efficiency; The electronic pressure gauge provides a portable gas source, which solves the typical problem of lack of gas source and cannot be calibrated on site, and avoids the difficulty of on-site operation due to equipment space problems.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall include within the scope of protection of the present invention.

Claims (10)

1. an air supply device for pneumatic valve calibration, characterized in that, comprising: a pressure input pipeline assembly (1), the pressure input pipeline assembly (1) is connected to the input end of the pressure reducing valve (2), and the output end of the pressure reducing valve (2) is connected to the pressure output pipeline (6); The pressure output pipeline (6) is sequentially connected with a pointer pressure gauge (3) and an electronic pressure gauge (4) for jointly monitoring the test air pressure from different gas supply paths; A switch (403), arranged on the air outlet channel of the electronic pressure gauge (4), is used to close the pressure reducing valve ( 2), connect the air supply path from the electronic pressure gauge (4) to the pressure output pipeline (6), and perform air supply to the pneumatic valve calibration through the electronic pressure gauge (4). 2 . The air supply device according to claim 1 , wherein the electronic pressure gauge ( 4 ) comprises: a housing ( 400 ) having an accommodating space inside, and is fixedly connected to the accommodating space of the housing ( 400 ). 3 . an air suction pump (401) in the space and a regulating valve (402) arranged on the air inlet pipe of the air suction pump (401); The switch (403) is connected to the exhaust port of the air pump (401), and is used to connect the air pump (401) with the air supply path of the pressure input pipeline assembly (1) when the air pressure is insufficient. The air supply path of the pressure output line (6) is checked by the air suction pump (401) to be pressed to the pneumatic valve. 3. The air supply device according to claim 2, wherein the electronic pressure gauge (4) further comprises a fine adjustment knob (404) rotatably connected to the housing (400). 4. The air supply device according to claim 3, characterized in that, a display (407) is further provided on the casing (400). 5. The air supply device according to claim 3, characterized in that, one end of the switching handle (405) of the switching switch (403) is movably connected to the housing (400), and the switching handle (405) ) is the free end. 6. The air supply device according to claim 4, wherein the electronic pressure gauge (4) further comprises a pressure detection part (406) and a controller connected to the pressure detection part (406), the controller It is also electrically connected to the air pump (401), the regulating valve (402), the pressure reducing valve (2), the switch (403) and the display (407), respectively; The switch (403) is also used to close the exhaust port and control the air suction pump (402) to stop working through the controller when the air pressure of the air supply path of the pressure input pipeline assembly (1) is normal . 7. The air supply device according to claim 6, characterized in that, a PCB circuit board is also fixedly connected in the casing (400), and the controller is arranged on the PCB circuit board. 8. The air supply device according to any one of claims 1-6, characterized in that, further comprising an exhaust valve (5) arranged on the pressure output line (6). 9 . The air supply device according to claim 8 , wherein the exhaust valve ( 5 ) is connected to a branch line of the pressure output line ( 6 ), and the branch line is far away from the pressure. 10 . One end of the output line (6) is connected to the atmosphere. 10. A pneumatic valve calibration device, characterized in that it comprises the air supply device according to any one of claims 1-9, the air supply device is connected with a pneumatic valve, and is used to realize the calibration of the pneumatic valve .

Images