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, a first stop valve, a first ball valve, a first main pump and a second stop valve are sequentially arranged on the water outlet pipeline 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 utility model, 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 utility model belongs to valve test technical field, concretely relates to a pressure reducing valve test system. BACKGROUND

[0002] In the test system of pressure reducing valve, the stability and automatic control of overall system pressure and flow, the automatic acquisition of data such as the pressure before valve, the pressure after valve, flow, the number and frequency of continuous action of the tested pressure reducing valve, and the temperature and real-time pressure of test medium are indispensable.In the development of the whole pressure reducing valve test system, the traditional single loop and manual control cannot meet the demand, and an automatic control, multi-loop and safe pressure reducing valve test system is urgently needed to be developed. CONTENT OF UTILITY MODEL

[0003] The utility model is just for the above problem, make up the deficiency of prior art, provide a pressure reducing valve test system;The utility model can realize the automatic control of pressure reducing valve test, multi-loop and have overpressure protection function.

[0004] To achieve the above object, the utility model adopts the following technical scheme.

[0005] The utility model provides a pressure reducing valve test system, including water source and backwater pressure stabilizing system, its characterized in that, backwater pressure stabilizing system is connected with water source through backwater pump and backwater pipeline, the water outlet pipeline of water source is connected with the input end of first pressure tank, first stop valve, first ball valve, first main pump and second stop valve are sequentially arranged on the water outlet pipeline from water source end, still branch setting has the pressure regulating pipeline with electric regulating valve on the water outlet pipeline, the pressure regulating pipeline is connected back water source, the output end of first pressure tank is connected with multiple test pipelines in parallel, every test pipeline is used to set the valve to be tested, every test pipeline is provided with third stop valve and front pressure sensor before the valve to be tested, every test pipeline is provided with rear pressure sensor, pressure relief branch pipeline, flowmeter, fourth stop valve and normally closed electromagnetic valve after the valve to be tested, is provided with pressure relief electromagnetic valve on pressure relief branch pipeline, front pressure sensor, rear pressure sensor and flowmeter signal are all transmitted to acquisition system, the input end of second pressure tank is connected with the end of all test pipelines in common, the output end of second pressure tank is connected to backwater pressure stabilizing system through pressure stabilizing water pipeline.

[0006] Further, the water outlet pipeline is also provided with a safety overpressure protection pipeline with a safety valve.

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

[0008] Further, the first pressure stabilizing tank is provided with a first pressure sensor and a first temperature sensor, the second pressure stabilizing tank is provided with a second pressure sensor and a second temperature sensor, and signals of the first pressure sensor, the first temperature sensor, the second pressure sensor and the second temperature sensor are transmitted to a collection system.

[0009] Further, the pipe diameters of the test pipes are different according to diameters of corresponding different test valves to be tested.

[0010] Further, the pipe diameters of the test pipes are the same according to a diameter of a same test valve to be tested.

[0011] Further, the water outlet pipe is further provided with a first check valve and a third ball valve in front of the first stop valve.

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

[0013] Further, the water return pipe is provided with a second check valve.

[0014] The utility model discloses beneficial effects.

[0015] The utility model provides pressure and flow stability, automatic control's test system, the valve front pressure of test pressure reducing valve, the valve rear pressure, flow, the number of times of continuous action operation and frequency and test medium temperature, real -time pressure etc. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical problem, technical scheme and beneficial effect solved by the utility model more clearly, the utility model is further detailed below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0017] Figure 1 It is the structural principle schematic diagram of the utility model.

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

[0019] The embodiment provides a pressure reducing valve test system, which comprises a water source 1 and a backwater pressure stabilizing system 2, the backwater pressure stabilizing system 2 is connected with the water source 1 through a backwater pump 3 and a backwater pipeline 4, the water source 1 is provided with a first liquid level meter 36 for monitoring the test water level, the backwater pressure stabilizing system 2 is provided with a second liquid level meter 37 for monitoring the water level of the backwater pressure stabilizing system 2, whether the water source 1 can carry out the test is judged by observing the first liquid level meter 36, and whether the backwater pump 3 can be started to carry out the test water back to the water source 1 is judged by observing the second liquid level meter 37.

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

[0021] The outlet pipeline 5 is also branch provided with a pressure regulating pipeline 12 with an electric regulating valve 11, the pressure regulating pipeline 12 is connected with the backwater source 1, and the required pressure is achieved by adjusting the electric regulating valve 11.

[0022] The water outlet pipeline 5 is further provided with a safety overpressure protection pipeline 26 with a safety valve 25, which is automatically opened to provide overpressure safety protection when the system pressure exceeds a safety value.

[0023] The water outlet pipeline 5 is provided with a standby pipeline 29 with 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, and only the first ball valve 8 and the first main pump 9 are opened during normal testing, and when the first ball valve 8 or the second main pump 28 is damaged or needs to be repaired, the standby second ball valve 27 and the second main pump 28 are opened to ensure that the test can be carried out normally.

[0024] The water outlet pipeline 5 is further provided with a first check valve 34 and a third ball valve 35 at the front end of the first stop valve 7, and the third ball valve 35 can be used to control the opening and closing of the overall water outlet pipeline 5, and the first check valve 34 can prevent the test water from flowing back in the opposite direction after the main pump is started.

[0025] The output end of the first pressure stabilizing tank 6 is connected in parallel with a plurality of test pipelines 13, and each test pipeline 13 is provided with a tested valve 14, and the pipe diameter of each test pipeline 13 can be set according to different test needs.

[0026] When a general test for verifying the performance of the factory is needed, because the specifications of the tested valves 14 are relatively many, in order to improve efficiency and avoid replacement time, the pipe diameters of the test pipelines 13 can be set to be different according to the diameters of the corresponding tested valves 14 to be tested, and the different tested valves 14 are installed on the corresponding test pipelines 13 according to the corresponding diameters to perform the general test at the same time.

[0027] When a performance test for identifying a plurality of tested valves 14 of the same specification is needed, in order to avoid the contingency of the test, the pipe diameters of the test pipelines 13 are set to be the same as the pipe diameters corresponding to the tested valves to be identified according to the diameters of the same tested valve 14 to be identified, and a plurality of tested valves 14 of the same specification are installed on the test pipelines 13 respectively to perform the identification test.

[0028] Each test pipeline 13 is provided with a third stop valve 15 and a front pressure sensor 16 at the front end of the tested valve 14, and the third stop valve 15 is opened, and the front pressure sensor 16 is used to collect the inlet pressure of the tested valve 14 on the corresponding test pipeline 13.

[0029] Each test pipeline 13 is provided with 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 at the rear end of the test valve 14, the pressure relief branch pipeline 18 is provided with a pressure relief electromagnetic valve 22, the signals of the front pressure sensor 16, the rear pressure sensor 17 and the flow meter 19 are transmitted to the acquisition system, the rear pressure of the valve is set, the rear pressure sensor 17 collects the pressure after the test valve 14 and transmits it to the acquisition system, when the safety value is exceeded, the control system controls the pressure relief electromagnetic valve 22 to automatically open for pressure relief, protecting the test valve 14 from being damaged, the fourth stop valve 20 is adjusted to meet the test flow or the valve rear pressure requirement, the flow is monitored by the flow meter 19 and transmitted to the acquisition system, the normally closed electromagnetic valve 21 is opened after being powered on, the opening interval time and the total number of the normally closed electromagnetic valve 21 are set, and the continuous operation test of the test valve 14 is started.

[0030] The ends of all test pipelines 13 are connected to the input end of the second pressure stabilizing tank 23, the second pressure stabilizing tank 23 is provided with a second pressure sensor 32 and a second temperature sensor 33, the signals of the second pressure sensor 32 and the second temperature sensor 33 are 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 transmitted to the acquisition system through the second temperature sensor 33 and the second pressure sensor 32 respectively

[0031] The output end of the second pressure stabilizing tank 23 is connected to the backwater pressure stabilizing system 2 through a pressure stabilizing water pipeline 24, when the second liquid level meter 37 monitors the preset value, the backwater pump 3 is opened to transmit the test water back to the water source 1. The backwater pipeline 4 is provided with a second check valve 38 for preventing the test water from flowing back.

[0032] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical solutions described in the utility model embodiments, and those skilled in the art should understand that the utility model can still be modified or replaced equivalently to achieve the same technical effect, as long as the use needs are met, it is within the protection scope of the utility model.

Claims

1. A pressure reducing valve testing system comprising a water source (1) and a backwater pressure stabilizing system (2), characterized in that, The backwater pressure stabilizing system (2) is connected with the water source (1) through a backwater pump (3) and a backwater pipeline (4), an outlet pipeline (5) of the water source (1) is connected with an input end of a 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 sequentially arranged on the outlet pipeline (5) from the water source (1) end, a pressure regulating pipeline (12) with an electric regulating valve (11) is further branch arranged on the outlet pipeline (5), the pressure regulating pipeline (12) is connected back to the water source (1), a plurality of test pipelines (13) are connected in parallel to an output end of the first pressure stabilizing tank (6), a valve under test (14) is arranged on each test pipeline (13), a third stop valve (15) and a front pressure sensor (16) are arranged at the front end of each test pipeline (13) at the valve under test (14) arrangement position, 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 valve under test (14) arrangement position, 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, and the ends of all the test pipelines (13) are connected in common with an input end of a second pressure stabilizing tank (23), an output end of the second pressure stabilizing tank (23) is connected to the backwater pressure stabilizing system (2) through a pressure stabilizing water pipeline (24).

2. A pressure reducing valve testing system according to claim 1, wherein A safety overpressure protection pipeline (26) with a safety valve (25) is further branch arranged on the outlet pipeline (5).

3. The pressure reducing valve testing system of claim 1, wherein A standby pipeline (29) with a second ball valve (27) and a second main pump (28) is arranged on the outlet pipeline (5) in parallel with the first ball valve (8) and the first main pump (9).

4. The pressure reducing valve testing system of claim 1, wherein A first pressure sensor (30) and a first temperature sensor (31) are arranged on the first pressure stabilizing tank (6), a second pressure sensor (32) and a second temperature sensor (33) are arranged on the second pressure stabilizing tank (23), 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 transmitted to the collection system.

5. The pressure reducing valve testing system of claim 1, wherein The pipe diameters of the test pipelines (13) are all different according to the diameters of the corresponding valves under test (14) to be tested.

6. The pressure reducing valve testing system of claim 1, wherein The pipe diameters of the test pipelines (13) are all the same according to the diameter of the same valve under test (14) to be identified.

7. The pressure reducing valve testing system of claim 1, wherein A first check valve (34) and a third ball valve (35) are further arranged on the outlet pipeline (5) at the front end of the first stop valve (7).

8. The pressure reducing valve testing system of claim 1, wherein, A first liquid level meter (36) is arranged at the water source (1), and a second liquid level meter (37) is arranged at the backwater pressure stabilizing system (2).

9. The pressure reducing valve testing system of claim 1, wherein, A second check valve (38) is arranged on the backwater pipeline (4).

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