An automatic standard pressure generator calibrating device

Abstract

This application relates to an automatic standard pressure generator calibration device, belonging to the technical field of pressure generator calibration. It includes a device housing, with one end face of the housing serving as a front panel and a rear panel opposite it. A pressure control module is installed inside the housing, comprising: a gas path valve block fixedly installed within the housing; an inlet main pipe located within the gas path valve block, one end of which is located on the rear panel, and the other end connected to the outside; at least two branch pipes connected to the inlet main pipe; branch sensors fixedly installed on the gas path valve block, connected to the end of the branch pipe furthest from the inlet main pipe, and used to detect the gas pressure within the branch pipe; and branch valves connected to the branch pipes, used to control the opening and closing of the branch pipes. This application improves the efficiency of pressure generator calibration operations and avoids the need for frequent replacement of multiple calibration devices of different specifications.

Description

Technical Field

[0001] This application relates to the technical field of pressure generator calibration, and in particular to an automatic standard pressure generator calibration device. Background Technology

[0002] In the field of pressure measurement, pressure generators are core equipment used to calibrate and verify pressure instruments, sensors and transmitters. The accuracy of the reference pressure value generated by the pressure generator is directly related to the reliability and consistency of pressure value transmission.

[0003] Traditional pressure generator calibration devices typically employ a fixed-range design, meaning a single calibration system is used only for a specific pressure range. When dealing with pressure generators of different ranges, these devices require multiple calibration sets of different specifications, or rely on manual switching of standards and associated piping. This calibration method results in a cumbersome process, low operational efficiency, and difficulty in meeting the demands of high-efficiency, fast-paced industrial environments. Utility Model Content

[0004] In order to improve the efficiency of pressure generator calibration operations and avoid frequent replacement of multiple calibration devices of different specifications, this application provides an automatic standard pressure generator calibration device.

[0005] This application provides an automatic standard pressure generator calibration device, which adopts the following technical solution: An automatic standard pressure generator calibration device includes: The device housing has a front panel on one end and a rear panel opposite to the front panel. A pressure control module, installed within the device housing, comprises: A pneumatic valve block, which is fixedly installed inside the device housing; The intake manifold is located inside the air passage valve block. One end of the intake manifold is located on the rear panel, and the other end of the intake manifold is connected to the outside. Branch pipes, wherein at least two branch pipes are provided, and all of the branch pipes are connected to the main intake pipe; A branch sensor is fixedly installed on the gas valve block. The branch sensor is connected to the end of the branch pipe away from the main intake pipe. The branch sensor is used to detect the gas pressure in the branch pipe. A branch valve, which is connected to the branch pipe, is used to control the opening and closing of the branch pipe.

[0006] Optionally, the pressure control module further includes: A protection sensor is connected to one end of the intake manifold near the rear panel, and the protection sensor is used to detect the air pressure inside the intake manifold; a main switch valve is connected to the air outlet of the intake manifold, and the main switch valve is used to control the opening and closing of the air outlet of the intake manifold; A safety valve is connected to the air inlet of the main air intake pipe, and the safety valve is used to control the opening and closing of the air inlet of the main air intake pipe.

[0007] Optionally, the pressure control module further includes an atmospheric pressure sensor, which is fixedly mounted on the gas valve block and is used to detect atmospheric pressure.

[0008] Optionally, a controller is fixedly installed on the gas valve block, and the branch sensor, the branch valve, the protection sensor, the main switch valve, the safety valve, and the atmospheric pressure sensor are all electrically connected to the controller; The controller is used to control the branch sensor, the branch valve, the protection sensor, the main switch valve, the safety valve, and the atmospheric pressure sensor.

[0009] Optionally, a control panel is fixedly installed on the front panel, and the control panel is electrically connected to the controller.

[0010] Optionally, the rear panel is provided with heat dissipation holes; A cooling fan is fixedly installed inside the housing of the device. The cooling fan is located on the heat dissipation hole and is electrically connected to the control panel.

[0011] Optionally, a bracket is fixedly installed inside the device housing, and a power supply is fixedly installed on the bracket. Both the control panel and the controller are electrically connected to the power supply.

[0012] Optionally, an interface board is fixedly installed on the rear panel, and multiple circuit interfaces are fixedly installed on the interface board. The circuit interfaces are used to connect the pressure generator and the pressure control module.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. When calibrating the pressure generator, connect the pressure generator to the pressure control module via the circuit interface. Select branch sensors with different ranges for the pressure generators to be calibrated, thereby improving the accuracy of the calibration of the pressure generators to be calibrated, improving the efficiency of the calibration operation, and avoiding frequent replacement of multiple calibration devices of different specifications. 2. By controlling the opening of the branch valve on the branch pipe, the pressure generator to be tested is tested through the corresponding branch sensor. Different branch sensors with different ranges are selected for the pressure generator to be tested to improve the accuracy of the test. 3. When the protection sensor detects that the actual pressure value is greater than the maximum range of the branch sensor in use, the main switch valve opens and releases the gas in the main intake pipe, reducing the gas pressure in the corresponding branch pipe, which protects the branch sensor and extends the service life of the automatic standard pressure generator calibration device. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a structural diagram used to show the rear panel; Figure 3 This is a structural diagram used to show the internal structure of the device casing; Figure 4 This is a structural diagram used to illustrate the pressure control module; Figure 5 It is a structural diagram used to show the connection status of the intake manifold and branch pipes.

[0015] Explanation of reference numerals in the attached figures: 1. Device housing; 11. Front panel; 111. Control panel; 12. Rear panel; 121. Interface board; 13. Cooling fan; 2. Pressure control module; 21. Gas circuit valve block; 22. Main intake pipe; 23. Branch pipe; 24. Branch valve; 25. Branch sensor; 26. Atmospheric pressure sensor; 27. Protection sensor; 28. Main switch valve; 3. Power supply; 31. Bracket. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0017] This application discloses an automatic standard pressure generator calibration device.

[0018] Reference Figure 1 , Figure 2 and Figure 3 An automatic standard pressure generator calibration device includes a device housing 1 and a pressure control module 2 installed inside the device housing 1.

[0019] One end face of the device housing 1 is a front panel 11. The front panel 11 can be connected to the device housing 1 by bolts to achieve disassembly and installation. A control panel 111 is fixedly installed on the front panel 11. Opposite to the front panel 11 is a rear panel 12. The rear panel 12 has heat dissipation holes. A cooling fan 13 is fixedly installed inside the device housing 1. The cooling fan 13 is set on the heat dissipation holes. The fan is electrically connected to the control panel 111. The control panel 111 can control the fan to turn on and off.

[0020] An interface board 121 is fixedly mounted on the rear panel 12. Multiple circuit interfaces are fixedly mounted on the interface board 121, used to connect the pressure generator and the pressure control module 2. A bracket 31 is fixedly mounted inside the device housing 1. A power supply 3 is fixedly mounted on the bracket 31. The bracket 31 lifts the power supply 3, preventing large-area contact between the power supply 3 and the device housing 1, thus improving the heat dissipation capacity of the power supply 3. The control panel 111 is electrically connected to the power supply 3.

[0021] During the calibration of the pressure generator, it is electrically connected to the pressure control module 2 via the circuit interface. Then, the power supply 3 is turned on, providing power to the cooling fan 13 and the pressure control module 2 to ensure their normal operation. The pressure generator is calibrated using the pressure control module 2.

[0022] Reference Figure 3 , Figure 4 and Figure 5 The pressure control module 2 includes an air circuit valve block 21, an air intake main pipe 22, a branch pipe 23, a branch sensor 25, and a branch valve 24.

[0023] The air circuit valve block 21 is fixedly installed inside the device housing 1. The main air intake pipe 22 is opened inside the air circuit valve block 21. One end of the main air intake pipe 22 is opened on the rear panel 12, and the other end of the main air intake pipe 22 is connected to the outside. There are six branch pipes 23, which are connected to the main air intake pipe 22 in parallel.

[0024] Branch sensor 25 is fixedly installed on gas valve block 21. Branch sensor 25 is connected to the end of branch pipe 23 away from the main intake pipe 22. Branch sensor 25 is used to detect the gas pressure in branch pipe 23. Each branch sensor 25 has a different rated range. One branch sensor 25 has a range not less than the maximum range of the pressure generator to be tested. The ranges of the other branch sensors 25 are all less than the maximum range of the pressure generator to be tested. Branch valve 24 is connected to branch pipe 23. Branch valve 24 is used to control the opening and closing of branch pipe 23.

[0025] When calibrating a pressure generator, first connect the outlet of the pressure generator to be calibrated to the main inlet pipe 22 and determine the rated range of the pressure generator to be calibrated. Then, select a suitable branch sensor 25 according to the rated range of the pressure generator to be calibrated, ensuring that the maximum range of the selected branch sensor 25 is closest to the rated maximum range of the pressure generator to be calibrated than the maximum range of the other branch sensors 25, and that the maximum range of the selected branch sensor 25 is greater than the rated maximum range of the pressure generator to be calibrated.

[0026] Then, by opening the branch valve 24 on the control branch pipe 23, the pressure generator to be tested is tested through the corresponding branch sensor 25. Different branch sensors 25 with different ranges are selected for the pressure generators to be tested to improve the accuracy of the test.

[0027] The pressure control module 2 also includes a protection sensor 27, a main switch valve 28, and a safety valve 29. The protection sensor 27 is connected to the end of the intake manifold 22 near the rear panel 12. The maximum range of each branch sensor 25 is smaller than the maximum range of the protection sensor 27. The protection sensor 27 is used to detect the air pressure inside the intake manifold 22. The main switch valve 28 is connected to the outlet of the intake manifold 22 and is used to control the opening and closing of the outlet of the intake manifold 22. The safety valve 29 is connected to the inlet of the intake manifold 22 and is used to control the opening and closing of the inlet of the intake manifold 22.

[0028] When the automatic standard pressure generator calibration device is working, the main switch valve 28 is opened, and gas enters the gas circuit valve block 21 through the main inlet pipe 22.

[0029] Under normal operating conditions, the main switch valve of safety valve 29 is normally closed. When the protection sensor 27 detects that the actual pressure value is greater than the maximum range of the branch sensor 25 in use, the main switch valve of safety valve 29 opens and releases the gas in the main intake pipe 22, reducing the gas pressure in the corresponding branch pipe 23, thus protecting the branch sensor 25 and extending the service life of the automatic standard pressure generator calibration device.

[0030] Pressure control module 2 also includes atmospheric pressure sensor 26, which is fixedly installed on gas valve block 21 and is used to detect atmospheric pressure.

[0031] A controller is fixedly installed on the gas valve block 21. The control panel 111, power supply 3, branch sensor 25, branch valve 24, protection sensor 27, main switch valve 28, safety valve 29 and atmospheric pressure sensor 26 are all electrically connected to the controller. The controller is used to control the branch sensor 25, branch valve 24, protection sensor 27, main switch valve 28, safety valve 29 and atmospheric pressure sensor 26.

[0032] The implementation principle of the automatic standard pressure generator calibration device in this application embodiment is as follows: When calibrating the pressure generator, the pressure generator is electrically connected to the pressure control module 2 through the circuit interface. For pressure generators under test with different ranges, branch sensors 25 with different ranges are selected to improve the accuracy of the calibration of the pressure generator under test, improve the efficiency of the pressure generator calibration operation, and avoid frequently changing multiple calibration devices of different specifications.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic standard pressure generator calibration device, characterized in that, include: Device housing (1), one end face of the device housing (1) is a front panel (11), and the rear panel (12) is disposed opposite to the front panel (11). A pressure control module (2) is installed inside the device housing (1), and the pressure control module (2) includes: Gas valve block (21), the gas valve block (21) is fixedly installed inside the device housing (1); The intake manifold (22) is located inside the air passage valve block (21). One end of the intake manifold (22) is located on the rear panel (12), and the other end of the intake manifold (22) is connected to the outside. Branch pipe (23), at least two of the branch pipes (23) are provided, and several of the branch pipes (23) are connected to the main intake pipe (22); Branch sensor (25), the branch sensor (25) is fixedly installed on the gas valve block (21), the branch sensor (25) is connected to the end of the branch pipe (23) away from the main air intake pipe (22), and the branch sensor (25) is used to detect the air pressure in the branch pipe (23); Branch valve (24) is connected to the branch pipe (23) and is used to control the opening and closing of the branch pipe (23).

2. The automatic standard pressure generator calibration device according to claim 1, characterized in that, The pressure control module (2) also includes: A protection sensor (27) is connected to one end of the intake manifold (22) near the rear panel (12), and the protection sensor (27) is used to detect the air pressure inside the intake manifold (22); a main switch valve (28) is connected to the air outlet of the intake manifold (22), and the main switch valve (28) is used to control the opening and closing of the air outlet of the intake manifold (22); Safety valve (29) is connected to the air inlet of the main air intake pipe (22) and is used to control the opening and closing of the air inlet of the main air intake pipe (22).

3. The automatic standard pressure generator calibration device according to claim 2, characterized in that, The pressure control module (2) also includes an atmospheric pressure sensor (26), which is fixedly installed on the gas valve block (21) and is used to detect atmospheric pressure.

4. The automatic standard pressure generator calibration device according to claim 3, characterized in that, A controller is fixedly installed on the gas valve block (21). The branch sensor (25), the branch valve (24), the protection sensor (27), the main switch valve (28), the safety valve (29), and the atmospheric pressure sensor (26) are all electrically connected to the controller. The controller is used to control the branch sensor (25), the branch valve (24), the protection sensor (27), the main switch valve (28), the safety valve (29), and the atmospheric pressure sensor (26).

5. The automatic standard pressure generator calibration device according to claim 4, characterized in that, A control panel (111) is fixedly installed on the front panel (11), and the control panel (111) is electrically connected to the controller.

6. The automatic standard pressure generator calibration device according to claim 5, characterized in that, The rear panel (12) has heat dissipation holes; A cooling fan (13) is fixedly installed inside the housing (1) of the device. The cooling fan (13) is disposed on the heat dissipation hole and is electrically connected to the control panel (111).

7. The automatic standard pressure generator calibration device according to claim 5, characterized in that, A bracket (31) is fixedly installed inside the housing (1) of the device, and a power supply (3) is fixedly installed on the bracket (31). The control panel (111) and the controller are both electrically connected to the power supply (3).

8. The automatic standard pressure generator calibration device according to claim 1, characterized in that, An interface board (121) is fixedly installed on the rear panel (12), and multiple circuit interfaces are fixedly installed on the interface board (121). The circuit interfaces are used to connect the pressure generator and the pressure control module (2).

Images