Pressure reducing valve test system

Abstract

A pressure reducing valve test system belongs to the technical field of valve test. A water return pressure stabilizing system is connected with a water source through a water return pump and a water return pipeline, a water outlet pipeline of the water source is connected with the input end of a first pressure stabilizing tank, the water outlet pipeline is sequentially provided with a first stop valve, a first ball valve, a first main pump and a second stop valve from the water source end, and the output end of the first pressure stabilizing tank is connected with a plurality of test pipelines in parallel. Each test pipeline is used for arranging a tested valve, each test pipeline is provided with a third stop valve and a front pressure sensor at the front end of the position where the tested valve is arranged, and each test pipeline is provided with a rear pressure sensor, a pressure relief branch pipeline, a flowmeter, a fourth stop valve and a normally closed solenoid valve at the rear end of the position where the tested valve is arranged. A pressure relief electromagnetic valve is arranged on the pressure relief branch pipeline, and the tail ends of all the test pipelines are jointly connected with the input end of a second surge tank. According to the invention, automatic control of the pressure reducing valve test can be realized, multiple loops are provided, and an overpressure protection function is provided.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve testing, and particularly relates to a pressure reducing valve testing system. Background Art

[0002] In the testing system of a pressure reducing valve, it is essential to ensure the stability of the overall system pressure and flow rate, as well as automatic control, and to automatically collect data such as the pressure before the valve, the pressure after the valve, the flow rate, the number and frequency of continuous action operations, the test medium temperature, and the real-time pressure of the pressure reducing valve to be tested. In the development of the entire pressure reducing valve testing system, traditional single-loop and manual control are no longer sufficient to meet the requirements, and there is an urgent need to develop an automatic control, multi-loop, and safe pressure reducing valve testing system. Summary of the Invention

[0003] Aiming at the above problems and making up for the deficiencies of the prior art, the present invention provides a pressure reducing valve testing system; the present invention can achieve automatic control of the pressure reducing valve test, multi-loop, and has an overpressure protection function.

[0004] To achieve the above object, the present invention adopts the following technical solutions.

[0005] The present invention provides a pressure reducing valve testing system, including a water source and a return water pressure stabilizing system. It is characterized in that the return water pressure stabilizing system is connected to the water source through a return water pump and a return water pipeline. The water outlet pipeline of the water source is connected to the input end of the first pressure stabilizing tank. On the water outlet pipeline, a first stop valve, a first ball valve, a first main pump, and a second stop valve are sequentially arranged from the water source end. A pressure regulating pipeline with an electric control valve is also branched on the water outlet pipeline, and the pressure regulating pipeline is connected back to the water source. The output end of the first pressure stabilizing tank is connected in parallel with multiple test pipelines, and each test pipeline is used to set the valve to be tested. A third stop valve and a pre-pressure sensor are arranged at the front end of each test pipeline where the valve to be tested is set. A post-pressure sensor, a pressure relief branch pipeline, a flow meter, a fourth stop valve, and a normally closed solenoid valve are arranged at the rear end of each test pipeline where the valve to be tested is set. A pressure relief solenoid valve is arranged on the pressure relief branch pipeline. The signals of the pre-pressure sensor, the post-pressure sensor, and the flow meter are all transmitted to the acquisition system. The ends of all the test pipelines are jointly connected to the input end of the second pressure stabilizing tank, and the output end of the second pressure stabilizing tank is connected to the return water pressure stabilizing system through a pressure stabilizing water pipeline.

[0006] Furthermore, a safety overpressure protection pipeline with a safety valve is also branched on the water outlet pipeline.

[0007] Furthermore, a standby pipeline with a second ball valve and a second main pump is arranged in parallel with the first ball valve and the first main pump on the water outlet pipeline.

[0008] Further, a first pressure sensor and a first temperature sensor are provided on the first pressure stabilizing tank, and a second pressure sensor and a second temperature sensor are provided on the second pressure stabilizing tank. Signals from the first pressure sensor, the first temperature sensor, the second pressure sensor, and the second temperature sensor are all transmitted to the acquisition system.

[0009] Further, the pipe diameters of the respective test pipelines are set to be different according to the diameters of different valves to be tested corresponding to the tests.

[0010] Further, the pipe diameters of the respective test pipelines are set to be the same according to the diameter of the same valve to be identified.

[0011] Further, a first check valve and a third ball valve are further provided on the water outlet pipeline in front of the first stop valve.

[0012] Further, a first liquid level gauge is provided at the water source, and a second liquid level gauge is provided in the return water pressure stabilizing system.

[0013] Further, a second check valve is provided on the return water pipeline.

[0014] Advantages of the present invention.

[0015] The present invention provides a test system with stable pressure and flow and automatic control. Data such as the pressure before the valve, the pressure after the valve, the flow rate, the number and frequency of continuous action operations, the test medium temperature, and the real-time pressure of the pressure reducing valve to be tested can be automatically collected. The pipe diameters of each test circuit are set according to the test requirements, and different pressure reducing valves with different diameters and models can be tested separately, or the same type of pressure reducing valve can be identified simultaneously, avoiding contingency, and protecting the valve to be tested and other components from being damaged when the system is overpressured, making it safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the technical problems, technical solutions, and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] Figure 1 It is a schematic structural principle diagram of the present invention.

[0018] Markings in the figure: 1 is the water source, 2 is the return water pressure stabilizing system, 3 is the return water pump, 4 is the return water pipeline, 5 is the water outlet pipeline, 6 is the first pressure stabilizing tank, 7 is the first stop valve, 8 is the first ball valve, 9 is the first main pump, 10 is the second stop valve, 11 is the electric control valve, 12 is the pressure regulating pipeline, 13 is the test pipeline, 14 is the valve under test, 15 is the third stop valve, 16 is the front pressure sensor, 17 is the rear pressure sensor, 18 is the pressure relief branch pipeline, 19 is the flow meter, 20 is the fourth stop valve, 21 is the normally closed solenoid valve, 22 is the pressure relief solenoid valve, 23 is the second pressure stabilizing tank, 24 is the pressure stabilizing water pipeline, 25 is the safety valve, 26 is the safety overpressure protection pipeline, 27 is the second ball valve, 28 is the second main pump, 29 is the standby pipeline, 30 is the first pressure sensor, 31 is the first temperature sensor, 32 is the second pressure sensor, 33 is the second temperature sensor, 34 is the first check valve, 35 is the third ball valve, 36 is the first liquid level gauge, 37 is the second liquid level gauge, 38 is the second check valve. Specific implementation mode

[0019] As shown in the accompanying drawings, this implementation mode provides a pressure reducing valve test system, including a water source 1 and a return water pressure stabilizing system 2. The return water pressure stabilizing system 2 is connected to the water source 1 through a return water pump 3 and a return water pipeline 4. A first liquid level gauge 36 for monitoring the test water level is arranged at the water source 1, and a second liquid level gauge 37 for monitoring the water level of the return water pressure stabilizing system 2 is arranged in the return water pressure stabilizing system 2. Whether the water volume of the water source 1 can be used for the test is judged by observing the first liquid level gauge 36, and whether the return water pump 3 can be started to transport the test water back to the water source 1 is judged by observing the second liquid level gauge 37.

[0020] The water outlet pipeline 5 of the water source 1 is connected to the input end of the first pressure stabilizing tank 6. A first stop valve 7, a first ball valve 8, a first main pump 9 and a second stop valve 10 are arranged on the water outlet pipeline 5 in sequence from the water source 1 end. The test water in the water source 1 enters the water outlet pipeline 5 through the first stop valve 7. When the first ball valve 8 is opened, the test water enters the main pump to boost the pressure, and then the second stop valve 10 is opened, and the test water enters the first pressure stabilizing tank 6. A first pressure sensor 30 and a first temperature sensor 31 are arranged on the first pressure stabilizing tank 6. The signals of the first pressure sensor 30 and the first temperature sensor 31 are both transmitted to the acquisition system. The temperature and pressure of the test water in the first pressure stabilizing tank 6 are transmitted to the acquisition system through the first temperature sensor 31 and the first pressure sensor 30.

[0021] A pressure regulating pipeline 12 with an electric control valve 11 is also branched on the water outlet pipeline 5. The pressure regulating pipeline 12 is connected back to the water source 1, and the required pressure is achieved by adjusting the electric control valve 11.

[0022] A safety overpressure protection pipeline 26 with a safety valve 25 is also branched on the water outlet pipeline 5. The safety valve 25 automatically opens for overpressure safety protection after the system pressure exceeds the safety value.

[0023] A standby pipeline 29 with a second ball valve 27 and a second main pump 28 is arranged in parallel with the first ball valve 8 and the first main pump 9 on the water outlet pipeline 5. During normal tests, only the first ball valve 8 and the first main pump 9 are opened. When the first ball valve 8 or the second main pump 28 is damaged or needs maintenance, the standby second ball valve 27 and the second main pump 28 are then opened to ensure that the test can proceed normally.

[0024] A first check valve 34 and a third ball valve 35 are also arranged at the front end of the first stop valve 7 on the water outlet pipeline 5. The third ball valve 35 can be used to control the switch of the overall water outlet pipeline 5, and the first check valve 34 can prevent the test water from flowing back reversely after each main pump starts.

[0025] The output end of the first pressure stabilizing tank 6 is connected in parallel with a plurality of test pipelines 13. Each test pipeline 13 is used to set the valve under test 14, and the pipe diameters of the test pipelines 13 can be set according to different test requirements.

[0026] When a general test for verifying the factory performance is required, since there are many specifications of the valves under test 14, in order to avoid the time for replacement and improve efficiency, the pipe diameters of the test pipelines 13 can be set to different pipe diameters according to the diameters of the different valves under test 14 corresponding to the test to be performed, and the different valves under test 14 are installed on the corresponding test pipelines 13 according to the corresponding diameter sizes to conduct the general test simultaneously.

[0027] When the performance of multiple valves under test 14 of the same specification needs to be identified, in order to avoid the contingency of the test, the pipe diameters of the test pipelines 13 are set to the same pipe diameters corresponding to the valve under test 14 to be identified according to the diameter of the same valve under test 14 to be identified, and multiple valves under test 14 of the same specification are respectively installed on the test pipelines 13 to conduct the identification test.

[0028] A third stop valve 15 and a front pressure sensor 16 are arranged at the front end of each test pipeline 13 at the position where the valve under test 14 is set. When the third stop valve 15 is opened, the front pressure sensor 16 is used to collect the inlet pressure of the valve under test 14 on the corresponding test pipeline 13.

[0029] At the rear end of each test pipeline 13 where the valve under test 14 is installed, a post-pressure sensor 17, a pressure relief branch pipeline 18, a flowmeter 19, a fourth stop valve 20, and a normally closed solenoid valve 21 are provided. A pressure relief solenoid valve 22 is provided on the pressure relief branch pipeline 18. Signals from the pre-pressure sensor 16, the post-pressure sensor 17, and the flowmeter 19 are all transmitted to the acquisition system. The post-valve pressure is set. The post-pressure sensor 17 collects the pressure after the valve under test 14 and transmits it to the acquisition system. When the safety value is exceeded, the control system controls the pressure relief solenoid valve 22 to automatically open for pressure relief to protect the valve under test 14 from being damaged. The required test flow rate or post-valve pressure is achieved by adjusting the fourth stop valve 20. The flow rate is monitored by the flowmeter 19 and transmitted to the acquisition system. The normally closed solenoid valve 21 opens after being powered on. The switch interval time and the total number of times of the normally closed solenoid valve 21 are set, and the continuous operation test of the valve under test 14 is started.

[0030] The ends of all the test pipelines 13 are jointly connected to the input end of the second pressure stabilizing tank 23. A second pressure sensor 32 and a second temperature sensor 33 are provided on the second pressure stabilizing tank 23. Signals from the second pressure sensor 32 and the second temperature sensor 33 are both transmitted to the acquisition system. The test water enters the second pressure stabilizing tank 23 through each test pipeline 13. The temperature and pressure of the test water in the second pressure stabilizing tank 23 are respectively transmitted to the acquisition system through the second temperature sensor 33 and the second pressure sensor 32. The output end of the second pressure stabilizing tank 23 is connected to the return water pressure stabilizing system 2 through a pressure stabilizing water pipeline 24. When the second liquid level gauge 37 monitors and reaches the preset value, the return water pump 3 is started to transmit the test water back to the water source 1. A second check valve 38 is provided on the return water pipeline 4 to prevent the reverse flow of the test water.

[0031] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effect; as long as the use requirements are met, they are all within the protection scope of the present invention.

Claims

1. A pressure reducing valve test system, comprising a water source (1) and a return water pressure stabilizing system (2), characterized in that: The return water pressure stabilizing system (2) is connected to the water source (1) via a return water pump (3) and a return water pipeline (4); the water outlet pipeline (5) of the water source (1) is connected to the input end of the first pressure stabilizing tank (6); the water outlet pipeline (5) is provided with a first stop valve (7), a first ball valve (8), a first main pump (9) and a second stop valve (10) in sequence from the water source (1) end; the water outlet pipeline (5) is also branched with a pressure regulating pipeline (12) with an electric regulating valve (11); the pressure regulating pipeline (12) is connected back to the water source (1); the output end of the first pressure stabilizing tank (6) is connected in parallel with a plurality of test pipelines (13); each of the test pipelines (13) is used to set a tested valve (14); each of the test pipelines (13) is connected to a tested valve (14) when the tested valve (14) is in the test pipeline (13); A third stop valve (15) and a front pressure sensor (16) are arranged at the front end of the test valve (14); a rear pressure sensor (17), a pressure relief branch pipeline (18), a flow meter (19), a fourth stop valve (20) and a normally closed electromagnetic valve (21) are arranged at the rear end of each test pipeline (13) at the test valve (14); a pressure relief electromagnetic valve (22) is arranged on the pressure relief branch pipeline (18); signals of the front pressure sensor (16), the rear pressure sensor (17) and the flow meter (19) are transmitted to a collection system; the ends of all the test pipelines (13) are connected to the input end of the second pressure stabilizing tank (23); and the output end of the second pressure stabilizing tank (23) is connected to the return water pressure stabilizing system (2) through a pressure stabilizing water pipeline (24).

2. A pressure reducing valve test system according to claim 1, characterized in that: The water outlet pipeline (5) is also branched and provided with a safety overpressure protection pipeline (26) having a safety valve (25).

3. A pressure reducing valve testing system according to claim 1, characterized in that: The water outlet pipeline (5) is provided with a spare pipeline (29) having a second ball valve (27) and a second main pump (28) in parallel with the first ball valve (8) and the first main pump (9).

4. A pressure reducing valve testing system according to claim 1, characterized in that: The first pressure stabilizing tank (6) is provided with a first pressure sensor (30) and a first temperature sensor (31), and the second pressure stabilizing tank (23) is provided with a second pressure sensor (32) and a second temperature sensor (33), and signals of the first pressure sensor (30), the first temperature sensor (31), the second pressure sensor (32), and the second temperature sensor (33) are all transmitted to a collection system.

5. A pressure reducing valve testing system according to claim 1, characterized in that: The pipe diameters of the test pipelines (13) are set to be different according to the diameters of the corresponding different test valves (14) to be tested.

6. A pressure reducing valve testing system according to claim 1, characterized in that: The pipe diameters of the test pipelines (13) are set to be the same according to the diameter of the same test valve (14) to be identified.

7. A pressure reducing valve testing system according to claim 1, characterized in that: A first check valve (34) and a third ball valve (35) are also provided on the water outlet pipeline (5) at the front end of the first stop valve (7).

8. A pressure reducing valve testing system according to claim 1, characterized in that: The water source (1) is provided with a first liquid level meter (36), and the return water pressure stabilization system (2) is provided with a second liquid level meter (37).

9. A pressure reducing valve testing system according to claim 1, characterized in that: The water return pipeline (4) is provided with a second check valve (38).

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