Gas valve testing device

Abstract

The invention relates to the technical field of valve test devices, in particular to a gas valve test device, and aims to solve the problem that a test device for adjusting test medium parameters (temperature, pressure and flow) according to specific requirements of different test valves is lacked. According to the scheme, a high-pressure gas storage tank, a flowmeter, a pressure reducing valve, a gas pressure gauge behind the pressure reducing valve, a test station and a test valve are sequentially arranged on a gas supply main pipeline; the electric heating device is installed on the test station and used for heating the test station, the electric heater is in signal connection with the PLC control box, the electric heater is controlled by the PLC control box, the requirements of the tested valve for various gas test media such as compressed air, nitrogen and carbon dioxide can be met, and meanwhile the test valves can be tested according to the specific requirements of different test valves. And test medium parameters (temperature, pressure and flow) are adjusted, and finally the gas valve test meeting the requirements is completed.

Description

Technical Field

[0001] The invention relates to the technical field of valve testing devices, and in particular to a gas valve testing device. Background Art

[0002] Valves are piping devices used in fluid systems to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. They play an important role in various industries and applications.

[0003] In industrial production, valves are key components for controlling fluid flow, and their performance and reliability are crucial to the safe operation of the entire system. Therefore, valve testing is particularly important, as it not only affects product quality, but also directly affects production efficiency and safety. In order to ensure that valves can meet various harsh working conditions, they must be rigorously tested. These tests usually include pressure testing, leakage testing, and performance testing.

[0004] At present, there is a lack of testing equipment that can adjust the test medium parameters (temperature, pressure, flow) according to the specific requirements of different test valves. Summary of the invention

[0005] The purpose of the patent of this invention: The invention is to solve the problem of lack of a test device for adjusting the test medium parameters (temperature, pressure, flow) according to the specific requirements of different test valves. The invention provides a gas valve test device.

[0006] The object of the present invention is achieved as follows: A gas valve test device, which includes a high-pressure gas storage tank, a flow meter, a pressure reducing valve, a gas pressure gauge after the pressure reducing valve, a test station, an electric heating device, a test valve, a PLC control cabinet and a gas supply main line;

[0007] High-pressure gas storage tanks, flow meters, pressure reducing valves, gas pressure gauges after pressure reducing valves, test stations and test valves are arranged in sequence on the gas supply main line;

[0008] The electric heating device is installed on the test station to heat the test station. The electric heater is connected to the PLC control box signal and the electric heater is controlled by the PLC control box.

[0009] Furthermore, the test station is a steam collecting box.

[0010] Further, it also includes an air supply shut-off valve, an air intake shut-off valve and a test valve air intake shut-off valve;

[0011] The air supply shut-off valve, air intake shut-off valve and test valve air intake shut-off valve are all arranged on the air supply main line. The air supply shut-off valve is located between the high-pressure gas storage tank and the flow meter, the air intake shut-off valve is located between the gas pressure gauge after the pressure reducing valve and the test station, and the test valve air intake shut-off valve is located between the test station and the test valve.

[0012] Furthermore, a filter arranged on the main air supply line is provided between the air supply cut-off valve and the flow meter.

[0013] Furthermore, the test station is connected to a first bypass and a second bypass, the first bypass is provided with a test station safety valve, and the third bypass is provided with a test station exhaust bypass electric valve.

[0014] Furthermore, a first interface and a second interface are provided on the test station, the first interface is provided with a test station safety valve, and the second interface is provided with a test station exhaust bypass electric valve.

[0015] Furthermore, a test gas pressure transmitter and a test gas temperature transmitter arranged on the gas supply main line are provided between the test station and the test valve.

[0016] Furthermore, a vent bypass is connected to the main air supply line between the test valve air inlet shut-off valve and the test valve, and a test gas release valve is provided on the vent bypass.

[0017] Furthermore, the test station is connected to a test station thermometer; or the test station is connected to a test station temperature transmitter, and the test station temperature transmitter is connected to the electric heater signal.

[0018] Furthermore, the pressure reducing valve is connected to the test station pressure transmitter signal.

[0019] Beneficial effects:

[0020] This solution can meet the test valve's needs for compressed air, nitrogen, carbon dioxide and other gas test media. At the same time, the test medium parameters (temperature, pressure, flow) can be adjusted according to the specific requirements of different test valves, and finally the gas valve test that meets the requirements can be completed. The device can realize a variety of gas valve tests and adopts PLC control cabinet for automatic control, which is convenient and fast to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a circuit connection schematic diagram of a gas valve test device of the present invention;

[0022] Figure 2 It is a control schematic diagram of a gas valve testing device of the present invention. DETAILED DESCRIPTION

[0023] Specific implementation method 1: A gas valve test device, which includes a high-pressure gas storage tank 1, a flow meter 4, a pressure reducing valve 5, a gas pressure gauge 6 after the pressure reducing valve, a test station 8, an electric heating device 9, a test valve 17, a PLC control cabinet 19 and a gas supply main line 20;

[0024] The high-pressure gas storage tank 1, the flow meter 4, the pressure reducing valve 5, the gas pressure gauge 6 after the pressure reducing valve, the test station 8 and the test valve 17 are arranged in sequence on the gas supply main line 20;

[0025] The electric heating device 9 is installed on the test station 8 for heating the test station 8 . The electric heater 9 is signal-connected to the PLC control box 9 and the electric heater 9 is controlled by the PLC control box 9 .

[0026] In this embodiment: the high-pressure gas storage tank 1 is used to store the test gas, and different test gas media such as compressed air, nitrogen, carbon dioxide, etc. can be selected according to the test requirements of different valves;

[0027] The heating wire is evenly wound on the test station and heated by an electric heater. The electric heater is controlled by a PLC control box to ensure that the gas inside is heated to the temperature required by the test;

[0028] The gas pressure gauge after the pressure reducing valve is used to display the gas temperature before heating.

[0029] The valve to be tested is installed on the test station, the test gas is adjusted to the predetermined pressure through the pressure reducing valve, the test gas is heated to the predetermined temperature through electric heating, the flow rate of the test medium is accurately measured by the flow meter, the pressure and temperature of the test medium and the opening of the automatic valve are accurately controlled by the PLC to ensure that the test gas with predetermined parameters enters the test valve, thereby completing the gas valve test.

[0030] Specific implementation method 2: A gas valve testing device, wherein the testing station 8 is a steam collecting box.

[0031] In this embodiment: the test station is a steam collecting box, on which a heating wire is evenly wound and heated by an electric heater.

[0032] Other implementations are the same as the first specific implementation.

[0033] Specific embodiment 3: A gas valve test device, which also includes a gas supply cut-off valve 2, an intake cut-off valve 7 and a test valve intake cut-off valve 14;

[0034] The air supply shut-off valve 2, the air intake shut-off valve 7 and the test valve air intake shut-off valve 14 are all arranged on the air supply main line 20. The air supply shut-off valve 2 is located between the high-pressure gas storage tank 1 and the flow meter 4. The air intake shut-off valve 7 is located between the gas pressure gauge 6 after the pressure reducing valve and the test station 8. The test valve air intake shut-off valve 14 is located between the test station 8 and the test valve 17.

[0035] In this embodiment: the test valve air inlet cut-off valve is used to cut off the test medium to ensure that the test medium does not enter the pipeline behind the cut-off valve when the test valve is replaced.

[0036] Other implementations are the same as the first specific implementation.

[0037] Specific implementation method 4: A gas valve test device, a filter 3 arranged on the gas supply main line 20 is provided between the gas supply cut-off valve 2 and the flow meter 4.

[0038] In this embodiment: the filter is used to filter the gas to prevent particulate matter from entering the subsequent gas supply main line, and the filtered gas is reduced in pressure by the pressure reducing valve and then enters the test station.

[0039] Other implementations are the same as the third specific implementation.

[0040] Specific implementation method five: A gas valve testing device, a first interface and a second interface are provided on the test station 8, a test station safety valve 10 is provided on the first interface, and a test station exhaust bypass electric valve 12 is provided on the second interface.

[0041] In this embodiment: the test station safety valve 6 is used to prevent overpressure at the test station and ensure the safety of the test station;

[0042] The test station exhaust bypass electric valve has two functions: one is to exhaust the air in the test station, so as to replace the test medium in the test station; the other is to automatically open before the test station safety valve takes off to prevent overpressure in the test station;

[0043] The test station emptying bypass electric valve is controlled by the PLC control cabinet to open and close, which can complete functions such as gas replacement and emptying and releasing.

[0044] Other implementations are the same as the first specific implementation.

[0045] Specific implementation method six: A gas valve testing device, a test station pressure transmitter 11 is provided on the test station 8.

[0046] In this embodiment: the pressure transmitter at the inspection station is used to measure the pressure of the test gas after heating and convert the pressure signal into a current signal and send it to the PLC control cabinet. The pressure reducing valve is controlled by the PLC to achieve precise control of the pressure of the test gas after heating.

[0047] Other implementations are the same as the first specific implementation.

[0048] Specific embodiment 7: A gas valve testing device, wherein a test gas pressure transmitter 15 and a test gas temperature transmitter 16 arranged on a gas supply main line 20 are provided between the test station 8 and the test valve 17 .

[0049] In this embodiment: the test gas pressure transmitter is used to measure the pressure of the test medium passing through the test valve and convert the pressure signal into a current signal and send it to the PLC control cabinet; the test gas temperature transmitter is used to measure the temperature of the test medium passing through the test valve and convert the temperature signal into a current signal and send it to the PLC control cabinet.

[0050] Other implementations are the same as the first specific implementation.

[0051] Specific embodiment 8: A gas valve test device, wherein a gas supply main line 20 between the test valve air intake cut-off valve 14 and the test valve 17 is connected to a gas release bypass, and a test gas release valve 18 is provided on the gas release bypass.

[0052] In this embodiment: the test gas release valve is used to release the gas in front of the test valve, which is convenient for replacing the valve and conducting the test again;

[0053] The test gas release valve is opened and closed by the PLC control cabinet, which can complete the gas release in front of the tested valve;

[0054] The air inlet shut-off valve of the test valve is opened and closed by the PLC control cabinet, and the test gas can be ensured to enter or not enter the test valve according to the PLC prefabricated program.

[0055] Other implementations are the same as the third specific implementation.

[0056] Specific implementation method 9: A gas valve testing device, the test station 8 is connected to a test station thermometer 13; or the test station 8 is connected to a test station temperature transmitter 21, and the test station temperature transmitter 21 is connected to the electric heater 9 by signal.

[0057] In this embodiment: the test station temperature transmitter measures the temperature of the heated test gas and converts the temperature signal into a current signal and sends it to the PLC control cabinet, and the PLC controls the electric heater to achieve precise control of the temperature of the heated test gas.

[0058] Other implementations are the same as the first specific implementation.

[0059] Specific implementation method ten: A gas valve testing device, the pressure reducing valve 5 and the test station pressure transmitter 11 are signal-connected.

[0060] Other implementations are the same as the sixth specific implementation.

[0061] The specific test process is as follows:

[0062] 1) Install the test valve on the test station and check whether all equipment in the test system is intact.

[0063] 2) Set the gas pressure in the pipeline after the pressure reducing valve according to the ambient temperature and the pressure in the high-pressure gas storage tank to ensure the gas temperature and gas pressure after heating.

[0064] 3) Open all valves in the pipeline to make the pipeline open to the air; open the manual valve at the outlet of the high-pressure gas storage tank, and adjust the high-pressure gas from the high-pressure gas storage tank to the set pressure by adjusting the opening of the pressure reducing valve to purge the system with gas and verify whether all valves in the system are normal.

[0065] 4) Adjust the pressure reducing valve to the minimum opening, turn on the electric heater, and preheat the system pipeline.

[0066] 5) Close the electric valve in front of the test valve, and adjust the opening of the pressure reducing valve to ensure that the gas pressure in the pipeline is maintained at the set pressure. Close the manual ball valve after the pressure reducing valve to seal the gas in the pipeline.

[0067] 6) Vent the branch valve before closing the test valve.

[0068] 7) The gas sealed in the pipeline is slowly heated to a predetermined temperature by an electric heater, and the pressure changes in the pipeline must be closely monitored during the heating process.

[0069] 8) Open the ball valve behind the pressure reducing valve, introduce the normal temperature high pressure gas after pressure reduction into the system, ensure the gas pressure, open the electric ball valve in front of the test valve to conduct the valve test. Record the gas pressure and temperature passing through the tested valve.

[0070] 9) After the valve test is completed, close the ball valve in front of the test valve and conduct a valve sealing test or the next valve test.

Claims

1. A gas valve testing device, characterized in that: It comprises a high-pressure gas storage tank (1), a flow meter (4), a pressure reducing valve (5), a gas pressure gauge after the pressure reducing valve (6), a test station (8), an electric heating device (9), a test valve (17), a PLC control cabinet (19) and a gas supply main line (20); A high-pressure gas storage tank (1), a flow meter (4), a pressure reducing valve (5), a gas pressure gauge (6) after the pressure reducing valve, a test station (8) and a test valve (17) are sequentially arranged on a gas supply main line (20); The electric heating device (9) is installed on the test station (8) for heating the test station (8). The electric heater (9) is signal-connected to a PLC control box (9) and the electric heater (9) is controlled by the PLC control box (9).

2. A gas valve testing device according to claim 1, characterized in that: The test station (8) is a steam collecting box.

3. A gas valve testing device according to claim 1, characterized in that: It also includes an air supply cut-off valve (2), an air intake cut-off valve (7) and a test valve air intake cut-off valve (14); The gas supply cut-off valve (2), the gas intake cut-off valve (7) and the test valve gas intake cut-off valve (14) are all arranged on the gas supply main line (20), the gas supply cut-off valve (2) is located between the high-pressure gas storage tank (1) and the flow meter (4), the gas intake cut-off valve (7) is located between the gas pressure gauge (6) after the pressure reducing valve and the test station (8), and the test valve gas intake cut-off valve (14) is located between the test station (8) and the test valve (17).

4. A gas valve testing device according to claim 3, characterized in that: A filter (3) arranged on the main air supply line (20) is provided between the air supply cut-off valve (2) and the flow meter (4).

5. A gas valve testing device according to claim 1, characterized in that: The test station (8) is provided with a first interface and a second interface, the first interface is provided with a test station safety valve (10), and the second interface is provided with a test station exhaust bypass electric valve (12).

6. A gas valve testing device according to claim 1, characterized in that: A test station pressure transmitter (11) is provided on the test station (8).

7. A gas valve testing device according to claim 1, characterized in that: A test gas pressure transmitter (15) and a test gas temperature transmitter (16) arranged on a gas supply main line (20) are provided between the test station (8) and the test valve (17).

8. A gas valve testing device according to claim 3, characterized in that: A gas supply main line (20) is connected to a gas discharge bypass between the test valve air inlet cut-off valve (14) and the test valve (17), and a test gas release valve (18) is arranged on the gas discharge bypass.

9. A gas valve testing device according to claim 1, characterized in that: The test station (8) is connected to a test station thermometer (13); or the test station (8) is connected to a test station temperature transmitter (21), and the test station temperature transmitter (21) is signal-connected to the electric heater (9).

10. A gas valve testing device according to claim 6, characterized in that: The pressure reducing valve (5) is signal-connected to the test station pressure transmitter (11).

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