A safety valve individual test device

Abstract

The utility model discloses a kind of safety valve individual test equipment, belong to safety valve detection technical field, including setting oil tank, test pump and safety valve to be measured, the oil outlet of oil tank is connected by first pipeline with the import of test pump intercommunication, the outlet of test pump is connected by second pipeline with the import of three-way pipe fitting;The first outlet of three-way pipe fitting is connected by third pipeline with the import of safety valve to be measured intercommunication, the outlet of safety valve to be measured is connected by fourth pipeline with the oil return flange of oil tank intercommunication, forms test loop;The second outlet of three-way pipe fitting is connected by fifth pipeline with the oil return port of oil tank intercommunication, forms oil return empty path;Switching valve assembly for oil return empty path and test loop switching is provided on three-way pipe fitting.The utility model has realized the operability of safety valve individual test, with the advantage that flexibility is high, meet the test demand of DV and DS series structure safety valve.

Description

Technical Field

[0001] This utility model belongs to the field of safety valve testing technology, and in particular relates to a safety valve stand-alone testing device. Background Technology

[0002] Safety valves, as core components of pressure equipment safety protection systems, play an irreplaceable role in industries such as petrochemicals, power energy, and heat supply. Their performance directly affects the inherent safety of pressure vessels, piping systems, and related process units. To ensure that safety valves can accurately and reliably fulfill their core safety responsibilities in practical applications, comprehensive and rigorous performance testing of safety valves is extremely crucial.

[0003] Currently, the industry commonly uses integrated pump unit testing methods to perform performance testing on safety valves used in pumps, where the safety valve and its matching pump unit are tested as a whole while connected. However, this combined testing system has significant technical limitations: First, dynamic interference factors such as fluid pulsation and mechanical vibration generated during pump unit operation can significantly affect the measurement accuracy of the safety valve's opening and closing characteristic parameters; second, connected testing requires the construction of a complex hydraulic testing system, leading to a prolonged testing cycle; third, when performance deviations occur during testing, the system coupling effect makes it difficult to accurately pinpoint the fault source, usually requiring simultaneous investigation of the compatibility between the pump unit and the safety valve. These technical deficiencies not only affect the independence of safety valve performance evaluation but also fail to accurately reflect its dynamic response characteristics under complex operating conditions. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a separate testing device for safety valves, which enables the operation of separate testing of safety valves, has the advantage of high flexibility, and meets the testing requirements of DV and DS series safety valves.

[0005] This utility model is implemented as follows: a safety valve stand-alone testing device includes an oil tank, a test pump, and a safety valve to be tested. The oil outlet of the oil tank is connected to the inlet of the test pump through a first pipeline, and the outlet of the test pump is connected to the inlet of a tee fitting through a second pipeline.

[0006] The first outlet of the three-way fitting is connected to the inlet of the safety valve under test through a third pipeline, and the outlet of the safety valve under test is connected to the return flange of the oil tank through a fourth pipeline, forming a test circuit.

[0007] The second outlet of the tee fitting is connected to the oil return port of the oil tank through the fifth pipeline to form an oil return vent.

[0008] The tee fitting is equipped with a switching valve assembly for switching between the return oil circuit and the test circuit.

[0009] Furthermore, the switching valve assembly includes a first ball valve and a second ball valve, the first ball valve being disposed on the first outlet side of the tee fitting, and the second ball valve being disposed on the second outlet side of the tee fitting.

[0010] Furthermore, both the first and second ball valves are one-piece ball valves. One-piece ball valves are small in size, lightweight, and space-saving. They can be compactly arranged within the limited space of a three-way fitting, making the entire hydraulic system layout more rational and compact, facilitating system integration and installation. When switching between the test circuit and the return oil circuit, operators can complete the operation quickly and accurately, without requiring complex operating procedures or specialized skills, thus improving work efficiency.

[0011] Furthermore, a workbench is provided on the upper surface of the oil tank, and the safety valve to be tested is placed on the workbench. Placing the safety valve to be tested on the workbench on the upper surface of the oil tank allows operators to easily install, disassemble, and debug the safety valve. During safety valve performance testing, operators can operate directly on the workbench, reducing unnecessary bending and squatting movements and improving work efficiency. Utilizing the space on the upper surface of the oil tank to place the workbench and the safety valve to be tested makes reasonable use of the vertical space of the oil tank, avoiding the need to build an additional work platform outside the oil tank, making the overall equipment layout more compact and saving space in the testing area. Operators can more directly observe the working status of the safety valve during the test near the workbench, such as observing the safety valve's leakage, whether the opening and closing actions are normal, etc. The performance of the safety valve can be monitored in real time, and potential problems can be detected in a timely manner.

[0012] Furthermore, a pressure gauge is installed at the inlet end of the tee fitting. The pressure gauge can display the pressure in the system in real time, allowing operators to monitor the current system pressure at any time and ensure that the pressure remains within the expected range during the test. By monitoring the pressure gauge reading, the output pressure of the test pump can be adjusted in a timely manner to ensure that the system pressure is stable at the required level, avoiding equipment damage or test failure caused by excessively high or low pressure.

[0013] The advantages and technical effects of this utility model are as follows: By adopting the above technical solution, the operability of individual safety valve testing is realized, which has the advantage of high flexibility and meets the testing requirements of DV and DS series safety valves.

[0014] By constructing a closed-loop test circuit independent of the pump unit, the mechanical vibration and fluid pulsation interference generated by the pump unit operation are isolated; the dual-channel design of the three-way fitting and the switching valve assembly allows the test medium to be precisely switched between the test circuit and the return oil circuit, ensuring the detection of key parameters such as the opening and closing pressure and sealing performance of the safety valve.

[0015] When performing pre-test checks on a safety valve, it may be necessary to allow the oil to return directly to the circuit to quickly establish and stabilize the oil circuit. Once the valve's parameters for formal testing, such as sealing and opening pressure, are ready, the circuit can be switched to the test loop. This flexible switching method reduces the time and steps required to transition between different testing phases, improving overall testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;

[0017] Figure 2 This is a top view of the overall structure provided in an embodiment of this utility model.

[0018] In the diagram: 1. Oil tank; 2. Test pump; 3. Safety valve to be tested; 4. First pipeline; 5. Second pipeline; 6. T-fitting; 7. Third pipeline; 8. Fourth pipeline; 9. Fifth pipeline; 10. Diverter valve assembly; 11. Workbench; 12. Pressure gauge. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0020] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1 and Figure 2 As shown, this application provides a safety valve stand-alone testing device, including an oil tank 1, a test pump 2 and a safety valve 3 to be tested. The oil outlet of the oil tank 1 is connected to the inlet of the test pump 2 through a first pipeline 4, and the outlet of the test pump 2 is connected to the inlet of a tee fitting 6 through a second pipeline 5.

[0022] The first outlet of the three-way fitting 6 is connected to the inlet of the safety valve 3 under test through the third pipe 7, and the outlet of the safety valve 3 under test is connected to the return flange of the oil tank 1 through the fourth pipe 8, forming a test circuit.

[0023] The second outlet of the three-way fitting 6 is connected to the return port of the oil tank 1 through the fifth pipeline 9, forming a return oil vent.

[0024] The tee fitting 6 is equipped with a switching valve assembly 10 for switching between the return oil circuit and the test circuit. Specifically, the switching valve assembly 10 includes a first ball valve and a second ball valve. The first ball valve is located at the first outlet side of the tee fitting 6, and the second ball valve is located at the second outlet side of the tee fitting 6. Both the first and second ball valves are one-piece ball valves. One-piece ball valves are small in size, lightweight, and space-saving. They can be compactly arranged within the limited space of the tee fitting 6, making the overall hydraulic system layout more reasonable and compact, facilitating system integration and installation. When switching between the test circuit and the return oil circuit, operators can complete the operation quickly and accurately without complicated operating procedures or professional operating skills, thus improving work efficiency.

[0025] Preferably, a workbench 11 is provided on the upper surface of the oil tank 1, and the safety valve 3 to be tested is placed on the workbench 11. Placing the safety valve 3 to be tested on the workbench 11 on the upper surface of the oil tank 1 allows operators to easily install, disassemble, and debug the safety valve 3. During the safety valve performance test, the operator can operate directly on the workbench 11, reducing unnecessary bending and squatting movements and improving work efficiency. Utilizing the space on the upper surface of the oil tank 1 to place the workbench 11 and the safety valve 3 to be tested makes reasonable use of the vertical space of the oil tank 1, avoiding the need to build an additional work platform outside the oil tank 1, making the overall equipment layout more compact and saving space in the test area. The operator can more directly observe the working status of the safety valve 3 during the test process near the workbench 11, such as observing the safety valve's leakage, whether the opening and closing actions are normal, etc. The performance of the safety valve can be monitored in real time, and potential problems can be detected in a timely manner.

[0026] Preferably, a pressure gauge 12 is provided at the inlet end of the tee fitting 6. The pressure gauge 12 can display the pressure in the system in real time, allowing operators to know the current system pressure at any time and ensure that the pressure is within the expected range during the test. By monitoring the reading of the pressure gauge 12, the output pressure of the test pump 2 can be adjusted in a timely manner to ensure that the system pressure is stable at the required level and to avoid equipment damage or test failure caused by excessively high or low pressure.

[0027] By adopting the above technical solution, the operability of individual safety valve testing is realized, which has the advantage of high flexibility and meets the testing requirements of DV and DS series safety valves.

[0028] By constructing a closed-loop test circuit independent of the pump unit, the mechanical vibration and fluid pulsation interference generated by the operation of the pump unit are isolated; the dual-channel design of the three-way fitting 6 and the switching valve assembly 10 allows the test medium to be precisely switched between the test circuit and the return oil circuit, ensuring the detection of key parameters such as the opening and closing pressure and sealing performance of the safety valve.

[0029] When performing pre-test checks on a safety valve, it may be necessary to allow the oil to return directly to the circuit to quickly establish and stabilize the oil circuit. Once the valve's parameters for formal testing, such as sealing and opening pressure, are ready, the circuit can be switched to the test loop. This flexible switching method reduces the time and steps required to transition between different testing phases, improving overall testing efficiency.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety valve stand-alone testing device, characterized in that, The system includes an oil tank, a test pump, and a safety valve to be tested. The oil outlet of the oil tank is connected to the inlet of the test pump through a first pipeline, and the outlet of the test pump is connected to the inlet of a tee fitting through a second pipeline. The first outlet of the three-way fitting is connected to the inlet of the safety valve under test through a third pipeline, and the outlet of the safety valve under test is connected to the return flange of the oil tank through a fourth pipeline, forming a test circuit. The second outlet of the tee fitting is connected to the oil return port of the oil tank through the fifth pipeline to form an oil return vent. The tee fitting is equipped with a switching valve assembly for switching between the return oil circuit and the test circuit.

2. The safety valve stand-alone testing equipment according to claim 1, characterized in that, The switching valve assembly includes a first ball valve and a second ball valve. The first ball valve is located on the first outlet side of the tee fitting, and the second ball valve is located on the second outlet side of the tee fitting.

3. The safety valve stand-alone testing equipment according to claim 2, characterized in that, The first ball valve and the second ball valve are one-piece ball valves.

4. The safety valve stand-alone testing equipment according to claim 1, characterized in that, A workbench is provided on the upper surface of the oil tank, and the safety valve to be tested is placed on the workbench.

5. The safety valve stand-alone testing equipment according to claim 1, characterized in that, A pressure gauge is installed at the inlet end of the tee fitting.

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