Gas pressure reducer verification equipment

Abstract

The utility model discloses gas pressure reducer calibration equipment, which relates to the field of pressure reducer calibration and comprises a calibration table, a high-pressure standard meter, a low-pressure standard meter and a detected gas pressure reducer, and a high-pressure standard meter interface, a low-pressure standard meter interface, a detected pressure reducer high-pressure end interface, a detected pressure reducer low-pressure end interface and a gas inlet interface are arranged at the top of the calibration table; the high-pressure standard meter is installed on the high-pressure standard meter interface, the low-pressure standard meter is installed on the low-pressure standard meter interface, one end of the detected gas pressure reducer is fixedly connected with the detected pressure reducer high-pressure end interface, the other end of the detected gas pressure reducer is fixedly provided with a gas guide pipe, and the tail end of the gas guide pipe is fixedly connected with the detected pressure reducer low-pressure end interface. And an air inlet pipe is fixedly arranged on the air inlet interface. The device is convenient to operate, is high in installation stability, and improves the verification efficiency of the gas pressure reducer.

Description

Technical Field

[0001] The utility model relates to the field of pressure reducer calibration, in particular to a gas pressure reducer calibration device. Background Art

[0002] The gas pressure reducer uses the opening of the opening and closing parts in the control valve body to adjust the flow of the medium and reduce the pressure of the medium. The characteristic of this equipment is that it can keep the outlet pressure within a certain range when the inlet pressure is constantly changing. It is an essential accessory for the pneumatic control valve so that the control valve can obtain a stable gas source power for adjustment and control.

[0003] When the existing gas pressure reducer is used, the calibration equipment used needs to quickly switch between high-pressure gas and low-pressure gas for calibration, so the operability of the calibration equipment is required to be high. In addition, the calibration is completed under different pressure environments, and the reliability of the calibrated pressure gauge after installation cannot be guaranteed. Therefore, a gas pressure reducer calibration equipment is proposed. Utility Model Content

[0004] In view of the above problems existing in the existing gas pressure reducer calibration equipment, the present utility model is proposed.

[0005] Therefore, the utility model aims to provide a gas pressure reducer calibration device to solve the problems raised by the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A gas pressure reducer calibration device comprises a calibration table, a high-pressure standard table, a low-pressure standard table and a gas pressure reducer to be tested, wherein the top of the calibration table is provided with a high-pressure standard table interface, a low-pressure standard table interface, a high-pressure end interface of the pressure reducer to be tested, a low-pressure end interface of the pressure reducer to be tested and an air inlet interface; the high-pressure standard table is installed on the high-pressure standard table interface, and the low-pressure standard table is installed on the low-pressure standard table interface; one end of the gas pressure reducer to be tested is fixedly connected to the high-pressure end interface of the pressure reducer to be tested, and the other end of the gas pressure reducer to be tested is fixedly provided with an air guide pipe, and the end of the air guide pipe is fixedly connected to the low-pressure end interface of the pressure reducer to be tested, and the air inlet interface is fixedly provided with an air inlet pipe; the interior of the calibration table is provided with a connecting pipe which connects the high-pressure standard table interface, the low-pressure standard table interface, the high-pressure end interface of the pressure reducer to be tested and the low-pressure end interface of the pressure reducer to be tested in series, and a high-pressure stainless steel precision pressure reducing valve and a first low-pressure stainless steel precision pressure reducing valve are respectively provided on the pipe wall of the connecting pipe and at positions close to the high-pressure standard table and the low-pressure standard table.

[0008] Preferably, a high-pressure pressure reducing valve filter and a low-pressure pressure reducing valve filter are respectively provided on the pipe wall of the connecting pipe and close to the high-pressure stainless steel precision pressure reducing valve and the first low-pressure stainless steel precision pressure reducing valve.

[0009] Preferably, a stop valve and a high-pressure air pump are connected to the end of the air inlet pipe.

[0010] Furthermore, the gas pressure reducer under inspection includes a pressure regulating handle, a high pressure gauge and a low pressure gauge.

[0011] Preferably, the high-pressure stainless steel precision pressure reducing valve, the first low-pressure stainless steel precision pressure reducing valve, the second low-pressure stainless steel precision pressure reducing valve and the low-pressure pressure switching valve are all arranged outside the calibration bench.

[0012] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0013] 1. The utility model can quickly install and connect the high-pressure standard meter, the low-pressure standard meter, the gas pressure reducer to be tested and the air inlet pipe through the high-pressure standard meter interface, the low-pressure standard meter interface, the high-pressure end interface of the pressure reducer to be tested, the low-pressure end interface of the pressure reducer to be tested and the air inlet interface arranged on the top of the calibration table, and the installation stability is high.

[0014] 2. The utility model is provided with a high-pressure stainless steel precision pressure reducing valve and a first low-pressure stainless steel precision pressure reducing valve, and the high-pressure stainless steel precision pressure reducing valve and the first low-pressure stainless steel precision pressure reducing valve are arranged outside the calibration table, so that the detection personnel can quickly adjust the pressure of the high-pressure gas and the pressure of the low-pressure gas.

[0015] 3. The utility model can filter high-pressure gas and low-pressure gas by means of the high-pressure pressure reducing valve filter and the low-pressure pressure reducing valve filter, thereby preventing impurities from entering the interior of the high-pressure standard meter, the low-pressure standard meter and the gas pressure reducer under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is the principle diagram of the utility model.

[0019] Description of reference numerals:

[0020] 1. Verification table; 2. High-pressure standard gauge; 3. Low-pressure standard gauge; 4. Tested gas pressure reducer; 5. High-pressure standard gauge interface; 6. Low-pressure standard gauge interface; 7. Tested pressure reducer high-pressure end interface; 8. Tested pressure reducer low-pressure end interface; 9. Air inlet interface; 10. Air guide tube; 11. Air inlet pipe; 12. High-pressure stainless steel precision pressure reducing valve; 13. First low-pressure stainless steel precision pressure reducing valve; 14. High-pressure pressure reducing valve filter; 15. Low-pressure pressure reducing valve filter; 16. Pressure regulating handle; 17. High-pressure gauge; 18. Low-pressure gauge; 19. Stop valve; 20. High-pressure air pump; 21. Connecting pipe; 22. Second low-pressure stainless steel precision pressure reducing valve; 23. Low-pressure pressure switching valve. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] The utility model embodiment discloses a gas pressure reducer calibration device.

[0023] The utility model provides Figure 1-2 The gas pressure reducer calibration device shown in the figure comprises a calibration table 1, a high-pressure standard table 2, a low-pressure standard table 3 and a gas pressure reducer 4 to be tested. The top of the calibration table 1 is provided with a high-pressure standard table interface 5, a low-pressure standard table interface 6, a high-pressure end interface 7 of the pressure reducer to be tested, a low-pressure end interface 8 of the pressure reducer to be tested and an air inlet interface 9; the high-pressure standard table 2 is installed on the high-pressure standard table interface 5, the low-pressure standard table 3 is installed on the low-pressure standard table interface 6, one end of the gas pressure reducer 4 to be tested is fixedly connected to the high-pressure end interface 7 of the pressure reducer to be tested, and the other .... An air guide pipe 10 is fixedly provided at the end, and the end of the air guide pipe 10 is fixedly connected to the low-pressure end interface 8 of the inspected gas pressure reducer, an air intake pipe 11 is fixedly provided on the air intake interface 9, the end of the air intake pipe 11 is connected to a stop valve 19 and a high-pressure air pump 20, the interior of the high-pressure air pump 20 is connected to a high-pressure gas source, and the high-pressure gas source is discharged into the interior of the high-pressure standard meter 2, the low-pressure standard meter 3 and the inspected gas pressure reducer 4 through the air intake pipe 11, the high-pressure standard meter 2, the low-pressure standard meter 3, the inspected gas pressure reducer 4 and the air intake pipe 11 can be quickly installed and connected, and the installation stability is high.

[0024] In order to facilitate the inspection personnel to operate, Figure 1-2As shown, the interior of the calibration bench 1 is provided with a connecting pipe 21 which connects in series the high-pressure standard gauge interface 5, the low-pressure standard gauge interface 6, the high-pressure end interface 7 of the inspected pressure reducer and the low-pressure end interface 8 of the inspected pressure reducer, and the wall of the connecting pipe 21 and the positions close to the high-pressure standard gauge 2 and the low-pressure standard gauge 3 are respectively provided with a high-pressure stainless steel precision pressure reducing valve 12 and a first low-pressure stainless steel precision pressure reducing valve 13, the high-pressure stainless steel precision pressure reducing valve 12, the first low-pressure stainless steel precision pressure reducing valve 13, the second low-pressure stainless steel precision pressure reducing valve 22 and the low-pressure pressure switching valve 23, so that the inspectors can quickly adjust the pressure of the high-pressure gas and the pressure of the low-pressure gas.

[0025] Finally, in order to be able to filter the gas, such as Figure 2 As shown, a high-pressure reducing valve filter 14 and a low-pressure reducing valve filter 15 are respectively provided on the wall of the connecting pipe 21 and near the high-pressure stainless steel precision reducing valve 12 and the first low-pressure stainless steel precision reducing valve 13, which can filter the high-pressure gas and the low-pressure gas to prevent impurities from entering the interior of the high-pressure standard meter 2, the low-pressure standard meter 3 and the tested gas reducer 4.

[0026] Directions:

[0027] 1. Instrument operation before instrument calibration;

[0028] 1.1. First, connect the external gas source to the power supply and start it. Make the internal pressure of the gas source greater than 15MPa.

[0029] 1.2. Connect the high-pressure hose to the air inlet of the equipment and tighten it to ensure there is no leakage;

[0030] 1.3. Open the stop valve on the high pressure gas source.

[0031] 1.4. Turn the pressure regulating handles of the high-pressure stainless steel precision pressure reducing valve 12, the first low-pressure stainless steel precision pressure reducing valve 13 and the second low-pressure stainless steel precision pressure reducing valve 22 counterclockwise to zero position (until they cannot be moved back any further), and connect the output interface to the gas pressure reducer 4 to be tested, the high-pressure standard meter 2 and the low-pressure standard meter 3;

[0032] 1.5. Loosen or unscrew the pressure regulating handle 16 of the gas pressure reducer 4 to be tested:

[0033] 1.6. Check the low-pressure gauge of the pressure reducer under test. If the pressure range of the low-pressure gauge is less than 0.6MPa, switch the arrow of the low-pressure switching valve handle to the left and select the second low-pressure stainless steel precision pressure reducing valve 22;

[0034] 1.7. If the pressure range of the low-pressure gauge is greater than 0.6MPa, please switch the arrow of the low-pressure switching valve handle to the right to select the first low-pressure stainless steel precision pressure reducing valve 13;

[0035] 2. High-pressure meter calibration:

[0036] 2.1. Slowly rotate the handle 12 of the high-pressure stainless steel precision pressure regulating valve clockwise and observe the rise of the high-pressure gauge pointer of the gas pressure reducer under test.

[0037] 2.2. When the pointer reaches the required pressure point, fine-tune the pressure regulating valve handle in the reverse direction; the pressure stabilizes at the current pressure point; read and record the data.

[0038] 2.3. Repeat steps 2.1-2.2 until the maximum inlet pressure of the gas pressure reducer 4 under test is reached (see the manual, generally 15MPa)

[0039] 2.4. During the return test, slowly rotate the handle of the high-pressure stainless steel precision pressure regulating valve 12 counterclockwise and observe the decrease of the pressure gauge pointer.

[0040] 2.5. When the pointer reaches the required pressure point, fine-tune the pressure regulating valve knob in the reverse direction; the pressure stabilizes at the current pressure point; read and record the data.

[0041] 2.6. Repeat steps 2.4-2.5 until 0 o'clock;

[0042] 2.7. Continue to slowly rotate the handle of the high-pressure stainless steel precision pressure regulating valve counterclockwise to return it to the zero position (until it stops moving);

[0043] 3. Low pressure meter calibration:

[0044] 3.1. Refer to steps 1.6-1.7 to select the switching direction of the low-pressure switching valve;

[0045] 3.2. Connect the low-pressure section interface 8 of the pressure reducer to be tested to the outlet of the low-pressure section of the pressure reducer to be tested through the matching connecting hose, and tighten it with a wrench;

[0046] 3.3. Slowly rotate the handle of the high-pressure stainless steel precision pressure regulating valve 12 clockwise and observe the rise of the high-pressure gauge pointer of the gas pressure reducer 4 under test

[0047] 3.4. When the pointer reaches the required pressure point, fine-tune the pressure regulating valve handle in the reverse direction; the pressure stabilizes at the current pressure point; read and record the data.

[0048] 3.5. Repeat steps 3.3-3.4 until the maximum outlet pressure allowed by the inspected pressure reducer is reached (see the manual, generally about 1 / 2-2 / 3 of the pressure gauge range); (Note that during the pressure increase process, the safety valve of the inspected oxygen pressure reducer may trip and activate the protection function, making it impossible to reach the calibration point)

[0049] 3.6. During the return test, slowly rotate the handle of the high-pressure stainless steel precision pressure regulating valve 12 counterclockwise and observe the decrease of the pressure gauge pointer.

[0050] 3.7. When the pointer reaches the required pressure point, fine-tune the pressure regulating valve knob in the reverse direction; the pressure stabilizes at the current pressure point; read and record the data.

[0051] 3.8. Repeat steps 3.7-3.8 until 0 o'clock;

[0052] 3.9. Continue to slowly rotate the handle of the high-pressure stainless steel precision pressure regulating valve 12 counterclockwise to return it to the zero position (until it stops moving);

[0053] At this time, the pressure reducer is calibrated, the pressure reducer under test is removed, and a new pressure reducer 4 for the gas under test is installed.

[0054] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gas pressure reducer calibration device, comprising a calibration table (1), a high-pressure standard meter (2), a low-pressure standard meter (3) and a gas pressure reducer to be tested (4), characterized in that: The top of the test bench (1) is provided with a high-pressure standard meter interface (5), a low-pressure standard meter interface (6), a high-pressure end interface (7) of the pressure reducer to be tested, a low-pressure end interface (8) of the pressure reducer to be tested, and an air inlet interface (9); The high-pressure standard meter (2) is installed on the high-pressure standard meter interface (5), the low-pressure standard meter (3) is installed on the low-pressure standard meter interface (6), one end of the gas pressure reducer (4) to be tested is fixedly connected to the high-pressure end interface (7) of the pressure reducer to be tested, the other end of the gas pressure reducer (4) to be tested is fixedly provided with an air guide tube (10), and the end of the air guide tube (10) is fixedly connected to the low-pressure end interface (8) of the pressure reducer to be tested, and the air inlet interface (9) is fixedly provided with an air inlet tube (11); The interior of the calibration bench (1) is provided with a connecting pipe (21) which connects in series a high-pressure standard gauge interface (5), a low-pressure standard gauge interface (6), a high-pressure end interface (7) of the pressure reducer to be tested, and a low-pressure end interface (8) of the pressure reducer to be tested; a high-pressure stainless steel precision pressure reducing valve (12), a first low-pressure stainless steel precision pressure reducing valve (13), a second low-pressure stainless steel precision pressure reducing valve (22), and a low-pressure pressure switching valve (23) are respectively provided on the wall of the connecting pipe (21) and at positions close to the high-pressure standard gauge (2) and the low-pressure standard gauge (3).

2. The gas pressure reducer calibration device according to claim 1, characterized in that: A high-pressure pressure reducing valve filter (14) and a low-pressure pressure reducing valve filter (15) are respectively arranged on the wall of the connecting pipe (21) and close to the high-pressure stainless steel precision pressure reducing valve (12) and the first low-pressure stainless steel precision pressure reducing valve (13).

3. The gas pressure reducer calibration equipment according to claim 1, characterized in that: The end of the air inlet pipe (11) is connected to a stop valve (19) and a high-pressure air pump (20).

4. The gas pressure reducer calibration device according to claim 1, characterized in that: The inspected gas pressure reducer (4) comprises a pressure regulating handle (16), a high pressure gauge (17) and a low pressure gauge (18).

5. The gas pressure reducer calibration equipment according to claim 1, characterized in that: The high-pressure stainless steel precision pressure reducing valve (12), the first low-pressure stainless steel precision pressure reducing valve (13), the second low-pressure stainless steel precision pressure reducing valve (22) and the low-pressure pressure switching valve (23) are all arranged outside the calibration table (1).

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