CN109163844B - A digital pressure calibration box - Google Patents

Abstract

A digital pressure calibration box, including a box body and a box cover. A connecting piece is provided at the connection between the box body and the box cover. A pressure chamber is provided in the box body, and a pressure accumulator and a pressure stabilizing chamber are provided in the pressure chamber. chamber, battery and control processor. The pressure storage chamber and the voltage stabilizing chamber are connected through a voltage stabilizing regulating valve. The battery is electrically connected to the pressure storage chamber and the voltage stabilizing chamber respectively. The control processor is connected to the pressure storage chamber and the voltage stabilizing chamber respectively. Communication connection; the inside of the box cover is provided with a display screen, and the control processor is connected to the display screen; the box is also provided with a control button board, a data interface, a calibration port and a measurement port, a control button board, a data interface and The measurement ports are all connected to the control processor, and the calibration port is connected to the pressure accumulator pipeline; the two pressure chambers of the invention, the pressure accumulator and the pressure stabilizing chamber, undergo two pressure stabilizing processes, the pressure regulating valve and the voltage stabilizing output valve, so that The output pressure is more stable, which improves the stability and accuracy of the calibration box's own pressure.

Description

A digital pressure calibration box

Technical field

The invention relates to the field of pressure calibration devices, and in particular to a digital pressure calibration box.

Background technique

The main structure of the existing pressure calibrator consists of a pressure pump, a pressure output end and a dial-type detection instrument. There are many problems when using the pressure calibrator with this structure, such as: it has a single function and can only calibrate. When used under pressure, other contents cannot be detected; the structure is complex, the volume is large, and it is inconvenient to carry. It is very troublesome to use during on-site verification; the verification data requires the user to manually read the records, and the results cannot be automatically recorded, which can easily cause detection results Subject to human influence; the provided pressure is difficult to control, the pressure output fluctuates greatly, the pressure is unstable, and the calibration accuracy is low; the present invention makes improvements based on the existing technology and proposes a digital pressure calibration box that can Overcome the above-mentioned existing problems well.

Contents of the invention

The main purpose of the present invention is to make the output pressure more stable and provide a digital pressure calibration box.

In order to achieve the above technical objectives, the technical solution adopted by the present invention is: a digital pressure calibration box, including a box body and a box cover, a connecting piece is provided at the connection between the box body and the box cover, and a connecting piece is provided in the box body. The pressure chamber is equipped with a pressure accumulator, a voltage stabilizing chamber, a battery and a control processor. The pressure accumulator and the voltage stabilizing chamber are connected through a voltage stabilizing regulating valve. The battery is electrically connected to the pressure accumulator and the voltage stabilizing chamber respectively. connection, the control processor is communicated with the pressure accumulator and the pressure stabilizing chamber respectively; the pressure stabilizing chamber is provided with a voltage stabilizing output valve and a first pressure relief valve, and the voltage stabilizing output valve is located on one side of the pressure stabilizing chamber and leads to Outside the box, there is an electric air pump and a second pressure relief valve in the pressure accumulator chamber. The pressure regulating valve, voltage stabilizing output valve and electric air pump are all connected to the control processor. There are pressure sensors in both the pressure accumulator chamber and the pressure stabilizing chamber. , the pressure sensor in the pressure storage chamber and the pressure sensor in the pressure stabilizing chamber are both communicatively connected to the control processor; a display screen is provided on the inside of the lid, the control processor and the display screen are communicatively connected to each other, and the display screen is electrically connected to the battery; The box is also equipped with a control button board, a data interface, a calibration port and a measurement port. The control button board is connected to the control processor, the data interface and the measurement port are both connected to the control processor, and the calibration port is connected to the pressure storage chamber. Pipe connections.

Preferably, the model of the control processor is AT89C2051.

Preferably, the box is provided with a temperature and air pressure sensor, and the temperature and air pressure sensor is communicatively connected to the control processor.

Preferably, the temperature sensor model is WRM-101.

Preferably, the box is also provided with a storage cavity, the storage cavity and the pressure cavity are arranged side by side, and the storage cavity is provided with a cavity cover.

Preferably, the measurement port includes a voltage and current measurement terminal and a voltage output terminal, and both the voltage and current measurement terminal and the voltage output terminal are electrically connected to the control processor.

Preferably, the outer surface of the box cover is hinged with a bracket. The bracket includes an upper bracket and a lower bracket. The upper bracket and the lower bracket are connected in a matching manner. The lower bracket can be telescopic to the inside of the upper bracket. There is a groove on the lid, and the bracket can be stored in the upper bracket. inside the groove.

Preferably, the stent is hollow cylindrical.

Preferably, the electric air pump is provided with an air inlet, and a filter is provided in the air inlet. The pressure stabilizing output valve, the first pressure relief valve and the second pressure relief valve are all provided with external air ports, and the external air ports and the inlet are provided with external air ports. The air ports are equipped with protective covers.

Preferably, the connecting member is a lock.

Preferably, the model of the pressure sensor is PT503Z-25MP.

Preferably, the model of the pressure regulating valve is a ZZY self-operated pressure regulating valve; the pressure regulating output valve is a 200P pressure reducing valve with a filter.

Preferably, a handle is fixed next to the connecting piece.

Technical effects and advantages of the present invention: The two pressure chambers of the invention, the pressure accumulator and the pressure stabilizing chamber, undergo two pressure stabilizing processes, the pressure stabilizing regulating valve and the voltage stabilizing output valve, so that the output pressure is more stable and the calibration box is improved. The stability and accuracy of its own pressure; the display screen is more intuitive and accurate compared to traditional dial-type instruments; the lock and handle settings make the box easy to move and carry, and the bracket can flexibly adjust the opening angle of the box lid according to actual use. As a result, the display screen is in a convenient viewing position for the staff who use it; the storage cavity can be used to place some spare tools, such as current and voltage clamps, standardized instruments, etc., for easy use, making the function of the calibration box more complete; The air inlet is equipped with a filter that can block dust and water vapor, so that the air entering the pressure accumulator is dry and free of impurities, which improves the accuracy of calibration and prevents corrosion and oxidation of water vapor inside the pressure accumulator and pressure stabilizing chamber; the calibration box does not When in use, the protective cover can prevent external water vapor and air from slowly oxidizing and corroding the air inlet and the external air port; calibration tools such as standard calibration tables can be inserted into the calibration port to facilitate real-time self-checking and adjustment of the calibration box, improving The calibration box verifies the accuracy; when calibrating the pressure device to be measured, the voltage and current measurement terminal can additionally measure the current and voltage values to improve the calibration accuracy; the voltage output terminal can provide voltage output to the outside to facilitate the calibration work; The temperature and air pressure sensor can sense the current temperature and pressure of the external space, and the control processor performs temperature feedback processing according to the current temperature during control to improve accuracy; the invention has a simple structure, easy-to-understand principles, strong practicability, and has good application prospect.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a schematic diagram of the interior of the pressure chamber of the present invention;

Figure 3 is a schematic diagram of the present invention when used with a bracket.

1. Box body; 2. Box lid; 21. Groove; 3. Handle; 4. Connector; 5. Display screen; 6. Control button board; 7. Storage cavity; 8. Calibration port; 9. Pressure chamber; 10. Pressure accumulator; 11. Pressure stabilizing chamber; 12. Electric air pump; 13. Pressure stabilizing regulating valve; 14. Pressure stabilizing output valve; 15. First pressure relief valve; 16. Data interface; 17. Chapter Two pressure relief valves.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

The present invention provides a preferred embodiment as shown in Figures 1 to 3, a digital pressure calibration box, which includes a box body 1 and a box cover 2. The connection between the box body 1 and the box cover 2 is provided with a connector. 4. The connecting piece 4 is a lock, and a handle 3 is fixed next to the connecting piece 4. A bracket is hinged on the outer surface of the box lid 2. The bracket includes an upper bracket and a lower bracket. The upper bracket and the lower bracket are connected together. The bracket is telescopic. The lower bracket can be telescopic to the inside of the upper bracket. The box cover 2 is provided with a groove 21, and the bracket can be stored in the groove 21. The bracket is a hollow cylindrical shape; the box 1 is provided with a pressure chamber 9, and the pressure chamber 9 is It is provided with a pressure accumulator 10, a voltage stabilizing chamber 11, a battery and a control processor. The control processor model is AT89C2051. The pressure accumulator 10 and the voltage stabilizing chamber 11 are connected through a voltage stabilizing regulating valve 13. The batteries are connected to the pressure accumulator respectively. The chamber 10 and the pressure stabilizing chamber 11 are electrically connected, and the control processor is communicated with the pressure accumulator chamber 10 and the pressure stabilizing chamber 11 respectively; the pressure stabilizing chamber 11 is provided with a pressure stabilizing output valve 14 and a first pressure relief valve 15. The pressure-stabilizing output valve 14 is located on one side of the pressure-stabilizing chamber 11 and leads to the outside of the box 1. The pressure-accumulating chamber 10 is provided with an electric air pump 12 and a second pressure relief valve 17, a pressure-stabilizing regulating valve 13, and a pressure-stabilizing output valve. 14 and the electric air pump 12 are equipped with signal receiving modules. The pressure regulating valve 13, the pressure regulating output valve 14 and the electric air pump 12 are all connected to the control processor. The model of the pressure regulating valve is ZZY self-operated pressure regulation. valve; the pressure-stabilizing output valve is a 200P pressure reducing valve with a filter; the electric air pump 12 is provided with an air inlet, and a filter is provided in the air inlet. The pressure-stabilizing output valve, the first pressure relief valve and the second The pressure relief valves are all equipped with external air ports, and the external air ports and air inlets are equipped with protective covers. The two pressure chambers of the pressure accumulator and the pressure stabilizing chamber are stabilized by the pressure regulating valve and the pressure stabilizing output valve, so that the output The pressure is more stable; the pressure storage chamber 10 and the pressure stabilizing chamber 11 are both equipped with pressure sensors. The pressure sensors in the pressure storage chamber 10 and the pressure sensors in the pressure stabilizing chamber 11 are both connected to the control processor through communication. The pressure sensors The model is PT503Z-25MP; there is a display screen 5 on the inside of the box cover 2, the control processor and the display screen 5 are connected to each other, and the display screen 5 is electrically connected to the battery; there is also a control button inside the box 1 Board 6, data interface 16, calibration port 8 and measurement port, control button board 6, data interface 16 and measurement port are all connected to the control processor. Specifically, control button board 6, data interface 16 and measurement port are all connected to the control processor. The processor is connected for communication, the calibration port 8 is connected to the pressure accumulator 10 through a pipeline, the measurement port includes a voltage and current measurement end and a voltage output end, both the voltage and current measurement end and the voltage output end are electrically connected to the control processor; the box 1 There is also a storage chamber 7 inside. The storage chamber 7 and the pressure chamber 9 are arranged side by side. The storage chamber 7 is provided with a chamber cover. The box 1 is provided with a temperature sensor. The temperature sensor is communicated with the control processor. The temperature sensor The model number is WRM-101.

Principle and method of use: Unlock the connector 4, open the box lid 2, adjust the bracket to rotate out of the groove on the outside of the box lid 2, and adjust the bracket so that the box lid 2 is at a suitable angle for use, and open the external air port and air inlet. Protective cover, control the control button board 6, turn on the power and control processor, at this time the display screen 5 displays the data measured by the pressure sensor and the temperature and pressure sensor. At this time, the data on the display screen 5 includes the pressure of the pressure accumulator 10, the stable pressure The air pressure in the pressure chamber 11 and the current temperature and pressure of the external environment are initialized and adjusted and self-checked based on the obtained data. After the inspection and adjustment are completed, tighten the first pressure relief valve 15 and the second pressure relief valve 17, and tighten the pressure stabilizing output valve 14 and The voltage and current measuring end is externally connected to the pressure device to be measured. After the connection is completed, the control processor is given a corresponding signal through the control button board 6. The control processor sends the signal, and the electric air pump 12, the voltage stabilizing regulating valve 13 and the voltage stabilizing output valve 14 receive the corresponding signal. signal and perform work. At this time, the display screen 5 will display the pressure value in the corresponding pressure accumulator 10, the pressure stabilizing chamber 11 and the voltage and current value of the pressure device to be measured. Record and compare the data obtained from the pressure device to be measured, and obtain the data to be measured. Whether there is any error in the pressure device, complete the calibration, control the control button board 6, the electric air pump 12, the pressure regulating valve 13 and the pressure regulating output valve 14 to stop working, open the pressure relief valve 15, release the high-pressure gas, the pressure accumulator 10 and the stabilizer When the pressure in the pressure chamber 11 is consistent with the outside world, close the protective cover.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or equivalent substitutions may be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in within the protection scope of the present invention.

Claims (12)

1. The utility model provides a digital pressure check-up case, includes box (1) and case lid (2), box (1) are equipped with connecting piece (4) with case lid (2) junction, its characterized in that:

the pressure-stabilizing device is characterized in that a pressure cavity (9) is arranged in the box body (1), a pressure accumulating chamber (10), a pressure stabilizing chamber (11), a storage battery and a control processor are arranged in the pressure cavity (9), the pressure accumulating chamber (10) and the pressure stabilizing chamber (11) are connected through a pressure stabilizing adjusting valve (13), the storage battery is respectively and electrically connected with the pressure accumulating chamber (10) and the pressure stabilizing chamber (11), and the control processor is respectively and communicatively connected with the pressure accumulating chamber (10) and the pressure stabilizing chamber (11); a pressure stabilizing output valve (14) and a first pressure relief valve (15) are arranged in the pressure stabilizing chamber (11), the pressure stabilizing output valve (14) is positioned at one side of the pressure stabilizing chamber (11) and led to the outer side of the box body (1), an electric air pump (12) and a second pressure relief valve (17) are arranged in the pressure accumulating chamber (10), the pressure stabilizing regulating valve (13), the pressure stabilizing output valve (14) and the electric air pump (12) are all in communication connection with a control processor, pressure sensors are arranged in the pressure accumulating chamber (10) and the pressure stabilizing chamber (11), and the pressure sensors in the pressure accumulating chamber (10) and the pressure stabilizing chamber (11) are all in communication connection with the control processor; a display screen (5) is arranged on the inner side of the box cover (2), the control processor is in communication connection with the display screen (5), and the display screen (5) is electrically connected with the storage battery; a control button plate (6), a data interface (16), a check port (8) and a measurement port are also arranged in the box body (1), the control button plate (6) is in communication connection with the control processor, the data interface (16) and the measurement port are both connected with the control processor, and the check port (8) is in pipeline connection with the pressure accumulation chamber (10);

the electric air pump (12) is provided with an air inlet, and the pressure stabilizing output valve, the first pressure relief valve and the second pressure relief valve are all provided with an external air port;

the measuring port comprises a voltage and current measuring end and a voltage output end, and the voltage and current measuring end and the voltage output end are electrically connected with the control processor;

during verification, the connecting piece (4) is loosened, the box cover (2) is opened, the first pressure relief valve (15) and the second pressure relief valve (17) are screwed, the voltage-stabilizing output valve (14) and the voltage and current measuring end are externally connected with a pressure device to be tested, the processor is controlled to send out signals through the control button plate (6), the electric air pump (12), the voltage-stabilizing regulating valve (13) and the voltage-stabilizing output valve (14) are controlled to work, the pressure value of the pressure accumulation chamber (10), the pressure value of the pressure stabilization chamber (11) and the voltage and current value of the pressure device to be tested displayed on the display screen (5) are recorded, and data obtained by comparing the pressure device to be tested are recorded and compared to obtain whether the pressure device to be tested has errors;

after the verification is finished, the control button plate (6) is controlled, the electric air pump (12), the pressure stabilizing regulating valve (13) and the pressure stabilizing output valve (14) are controlled to stop working, and the pressure release valve is opened to release high-pressure gas, so that the pressure in the pressure accumulating chamber (10) and the pressure stabilizing chamber (11) is consistent with the outside.

2. The digital pressure check box of claim 1, wherein: the model of the control processor is AT89C2051.

3. The digital pressure check box of claim 2, wherein: the box body (1) is provided with a temperature sensor which is in communication connection with the control processor.

4. A digital pressure check box according to claim 3, wherein: the model of the temperature sensor is WRM-101.

5. The digital pressure check box of claim 4, wherein: the box body (1) is also internally provided with a storage cavity (7), the storage cavity (7) and the pressure cavity (9) are arranged in parallel, and the storage cavity (7) is provided with a cavity cover.

6. The digital pressure check box of claim 1, wherein: the outer surface of the box cover (2) is hinged with a support, the support comprises an upper support and a lower support, the upper support is connected with the lower support in a matched mode, the lower support can stretch into the upper support, a groove (21) is formed in the box cover (2), and the support can be stored in the groove (21).

7. The digital pressure check box of claim 6, wherein: the support is hollow cylindrical.

8. The digital pressure check box of claim 7, wherein: a filter screen is arranged in the air inlet, and protective covers are arranged on the external air inlet and the air inlet.

9. The digital pressure check box of claim 8, wherein: the connecting piece (4) is a lock catch.

10. The digital pressure check box of claim 9, wherein: the pressure sensor is of the model PT503Z-25MP.

11. The digital pressure check box of claim 10, wherein: the pressure stabilizing regulating valve is a ZZY type self-operated pressure regulating valve; the pressure stabilizing output valve is a 200P pressure reducing valve with a filter screen.

12. A digital pressure check box according to any of claims 1-11, wherein: a handle (3) is fixedly arranged beside the connecting piece (4).