A gate valve online sealing test device

Abstract

The present invention relates to the field of nuclear power equipment, and in particular to an online sealing test device for gate valves. It includes an electrical control module, a boosting module, and a measuring module. Its water tank is connected to a gas-liquid boosting pump and a primary boosting pump through a pipeline and finally outputs to a test piece. The pipeline is provided with components such as a low-pressure pump, a ball valve, a Y-type filter, a one-way valve, a gas cylinder, a flow meter, and a pressure transmitter. The electrical control module controls each solenoid valve and a gas-controlled needle valve to realize various functions required for the test, thereby realizing an automated test process. Various test data can be displayed on the computer side, and test parameters such as pressure drop values, leakage values, etc. can be recorded and stored. The modular structural design and lightweight design enable the equipment to have high passability in a small space and be portable and movable. This embodiment can test a variety of gate valves and other valves, with a wide test pressure range and strong versatility, meeting the requirements of convenience and efficiency.

Description

Technical Field

[0001] The invention belongs to the field of nuclear power equipment, and in particular relates to an online sealing test device for a gate valve. Background Art

[0002] With the increasing shortage of energy and the rapid deterioration of the environment, nuclear power has gradually been valued by various countries around the world as a safe, clean, economical and large-scale energy form. Nuclear power valves, as one of the key equipment to ensure the safety of nuclear power plant systems, are not only system control and regulation devices, but also pressure-bearing equipment, playing an important role in the operation of the entire nuclear power plant. In the normal operation of nuclear power plants, valves are the main equipment that needs to be repaired, so valve sealing detection is an indispensable part. It is necessary to determine whether the sealing performance of each valve meets the standard and detect the leakage of the valve to identify the valves that need to be replaced or repaired to ensure the safety and reliability of the system.

[0003] After searching, in the prior art, Chinese patent announcement number: CN219161543U, authorization date: 2023-06-09, discloses a valve sealing test device, which includes: an operating frame, a slide rail arranged in the operating frame, a valve disc support assembly arranged on the slide rail for supporting and positioning the valve disc, a valve stem support assembly arranged on the slide rail for supporting and positioning the valve stem, and a driving device arranged at one end of the operating frame, wherein the valve disc support assembly and the driving device are arranged on both sides of the valve stem support assembly relative to each other, and the driving device is used to connect with one end of the valve stem to push the valve stem and the valve disc to move along the slide rail. The driving device can provide a calculated closing torque to the valve disc and the valve stem, so that the applied closing force can be quantified, which greatly improves the accuracy of the blue oil test of the horizontally arranged large-diameter wedge gate valve and ensures the functional availability of the equipment.

[0004] However, the device still has the following defects: Although the above embodiments reduce the workload of the staff and improve the maintenance efficiency. However, the valve sealing test system used in nuclear power plants is large in size and heavy in weight, and is often fixed to a specific workstation, and cannot be portable and movable. Therefore, it is necessary to manually disassemble the valve and transfer it to a fixed place for testing. When the number of gate valves to be tested is huge, the testing process is very cumbersome, and the process consumes a lot of manpower, time and effort. Summary of the invention

[0005] In view of the above problems, the present invention provides an online sealing test device for a gate valve, comprising an electrical control module, a booster module, and a measuring module, wherein the booster module comprises an air source inlet, a water source inlet, an air source pressure regulating valve, a pressure gauge A, an electrical proportional valve, an electromagnetic water valve A, a water tank, a liquid level gauge, a ball valve A, an electromagnetic water valve B, a water pump, a filter, a ball valve B, an electromagnetic valve A, and a primary booster pump;

[0006] The measuring module includes a solenoid valve B, a high-pressure booster pump, a gas cylinder, a pressure gauge B, a high-pressure needle valve, a solenoid valve C, a solenoid valve D, a solenoid valve E, a pneumatically controlled needle valve A, a flow meter, a pressure transmitter, a pressure gauge C, a pneumatically controlled needle valve B, a pneumatically controlled needle valve C, and a test outlet.

[0007] Furthermore, the inlet end of the air source pressure regulating valve is connected to the air source inlet; the pressure gauge A is connected to the outlet end of the air source pressure regulating valve; the inlet end of the electric proportional valve is connected to the outlet end of the air source pressure regulating valve, and the outlet end of the electric proportional valve is respectively connected to the air source inlet ends of the solenoid valve A and the solenoid valve B.

[0008] Furthermore, a liquid level gauge is provided inside the water tank, the electromagnetic water valve A is connected to the water source inlet and the ball valve A; the electromagnetic water valve B is connected to the ball valve A and the water pump inlet, and the air source inlet of the first-stage booster pump is connected to the air source outlet of the electromagnetic valve A.

[0009] Furthermore, the water outlet of the high-pressure booster pump is connected to the gas cylinder, and the gas source inlet of the high-pressure booster pump is connected to the gas source outlet of the solenoid valve B to provide and compensate pressure for the system; the pressure gauge B is installed between the gas cylinder and the high-pressure needle valve; the high-pressure needle valve is connected to the gas cylinder and the air-controlled needle valve A; the water inlet of the flow meter is connected to the air-controlled needle valve A, and the water outlet of the flow meter is connected to the test outlet.

[0010] Furthermore, the air source inlet of the air-controlled needle valve A is connected to the air source outlet of the solenoid valve D; one end of the air-controlled needle valve B is located between the gas cylinder and the high-pressure needle valve and between the flow meter and the pressure transmitter; the air source inlet of the air-controlled needle valve B is connected to the air source outlet of the solenoid valve C; one end of the air-controlled needle valve C is connected to the test outlet, and the other end is connected to the ball valve B through the return pipe.

[0011] Furthermore, the solenoid water valve A, liquid level meter, solenoid water valve B, and solenoid valve A are connected to the electrical module through cable A, and quick-plug connectors are used at the joints; the water pump is connected to the electrical module through a water pump power cord, and a quick-plug connector is used at one end connected to the electrical module.

[0012] Furthermore, the solenoid valve B, the solenoid valve C, the solenoid valve D, and the solenoid valve E are connected to the electrical module via a cable B, and quick-connect connectors are used at the joints.

[0013] Furthermore, the electrical control module, boost module and measurement module are all designed as box structures, and each box module is designed with handrails for pushing and carrying. The electrical control module, boost module and measurement module are all designed with casters at the bottom.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention adopts a modular design, and each module is connected by a quick-plug wiring method. The volume of each module meets the passability of the narrowest passage at the nuclear power site, and the lightweight design allows the staircase passage to be lifted up and down with the cooperation of one or two people. When in use, the equipment can be directly pushed to the site, connected through a quick pipeline, and the online detection test of the gate valve can be directly carried out. The present invention is matched with some valve fixtures, and the valve can also be tested offline.

[0016] 2. The present invention is controlled by a computer, the electrical automation level is high, and the entire test process is carried out automatically.

[0017] 3. The present invention can meet the requirements of online sealing test of gate valves within the pressure range of 0.2-20Mpa, and the water filling and exhaust time and pressure holding time can be freely set. During the test, single-stage or multi-stage pressure holding test can be arbitrarily set, which is convenient and quick.

[0018] 4. The present invention uses a primary booster pump in combination with a high-pressure booster pump, so that the pressure value within the test pressure range can be better controlled and more accurate.

[0019] 5. The present invention controls the boosting size of the boosting pump through an electrical proportional valve, and can adjust the system pressure value in real time. When the system pressure decreases, the electrical proportional valve increases the intake pressure of the boosting pump to replenish the system pressure, and can adjust the boosting rate according to the degree of pressure reduction, thereby achieving the function of always maintaining the test pressure during the leakage measurement process. Combined with the use of a flow meter, the leakage value of the valve can be directly measured, and the result is accurate and intuitive.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A system flow chart according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of the structure of an embodiment of the present invention is shown;

[0024] Figure 3A schematic structural diagram of a boost module according to an embodiment of the present invention is shown;

[0025] Figure 4 A schematic diagram of the structure at location A according to an embodiment of the present invention is shown.

[0026] In the figure: 1. Computer; 2. Electrical module; 3. Printer; 4. Air source inlet; 5. Water source inlet; 6. Air source pressure regulating valve; 7. Pressure gauge A; 8. Electrical proportional valve; 9. Solenoid water valve A; 10. Water tank; 11. Liquid level gauge; 12. Ball valve A; 13. Solenoid water valve B; 14. Water pump; 15. Filter; 16. Ball valve B; 17. Solenoid valve A; 18. Primary booster pump; 19. Cable A; 20. Cable B; 21. Air pipe; 22. High pressure hose; 23. Water pump electric Source line; 24, return pipe; 25, solenoid valve B; 26, high-pressure booster pump; 27, gas cylinder; 28, pressure gauge B; 29, high-pressure needle valve; 30, solenoid valve C; 31, solenoid valve D; 32, solenoid valve E; 33, air-controlled needle valve A; 34, flow meter; 35, pressure transmitter; 36, pressure gauge C; 37, air-controlled needle valve B; 38, air-controlled needle valve C; 39, test outlet; 40, casters; 100, electrical control module; 200, booster module; 300, measurement module. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] A gate valve online sealing test device is further described in detail below in conjunction with the accompanying drawings.

[0029] Combined with Figure 1 and Figure 2 , Figure 3 , Figure 4 A gate valve online sealing test device includes an electrical control module 100, a boost module 200, and a measuring module 300.

[0030] Furthermore, the electrical control module includes a computer 1, an electrical module 2, and a printer 3; the computer 1 is configured with professional measurement and control software, which can set test parameters and display test data. After the test is completed, the test information can be automatically stored and a test report can be generated; the electrical module 2 mainly provides power for each system and is responsible for collecting information from each sensor, and controlling the operation of each valve and booster pump; the printer 3 is connected to the computer 1 and can print the test report directly on site.

[0031] Furthermore, the boost module 200 includes an air source inlet 4, a water source inlet 5, an air source pressure regulating valve 6, a pressure gauge A7, an electrical proportional valve 8, an electromagnetic water valve A9, a water tank 10, a liquid level gauge 11, a ball valve A12, an electromagnetic water valve B13, a water pump 14, a filter 15, a ball valve B16, an electromagnetic valve A17, and a first-stage boost pump 18; the inlet end of the air source pressure regulating valve 6 is connected to the air source inlet 4 for adjusting the air intake pressure of the equipment; the pressure gauge A7 is connected to the outlet end of the air source pressure regulating valve 6 for displaying the air intake pressure; the inlet end of the electrical proportional valve 8 is connected to the outlet end of the air source pressure regulating valve 6, and the outlet end of the electrical proportional valve 8 is respectively connected to the air source inlet end of the electromagnetic valve A17 and the electromagnetic valve B25, which is mainly used to adjust the air intake pressure of the pump, thereby forming a stepless adjustment system. Pressure value; a liquid level gauge 11 is arranged inside the water tank 10, and the liquid level gauge 11 can feedback the liquid level information. The water outlet and the water return port of the water tank 10 are connected to the ball valve A12 and the ball valve B16 respectively; the electromagnetic water valve A9 is connected to the water source inlet 5 and the ball valve A12; the electromagnetic water valve B13 is connected to the ball valve A12 and the water inlet of the water pump 14; the water outlet of the water pump 14 is connected to the filter 15; the water inlet of the first-stage booster pump 18 is connected to the filter 15, and the water outlet of the first-stage booster pump 18 is connected to the water inlet of the high-pressure booster pump 26 through a high-pressure hose 22; the air source inlet of the first-stage booster pump 18 is connected to the air source outlet of the electromagnetic valve A17, and the first-stage booster pump 18 is mainly used to provide and compensate pressure for the system when the test pressure is in the range of 0.2-10Mpa.

[0032] Further, the measuring module 300 includes a solenoid valve B25, a high-pressure boosting pump 26, a gas cylinder 27, a pressure gauge B28, a high-pressure needle valve 29, a solenoid valve C30, a solenoid valve D31, a solenoid valve E32, an air-controlled needle valve A33, a flow meter 34, a pressure transmitter 35, a pressure gauge C36, an air-controlled needle valve B37, an air-controlled needle valve C38, and a test outlet 39; the solenoid valve B25 and the boosting module 200 are connected through an air pipe 21, the water outlet of the high-pressure boosting pump 26 is connected to the gas cylinder 27, the air source inlet of the high-pressure boosting pump 26 is connected to the air source outlet of the solenoid valve B25, and the high-pressure boosting pump 26 is mainly used to provide and compensate pressure for the system when the test pressure is in the range of 10-20Mpa; the pressure gauge B28 is installed between the gas cylinder 27 and the high-pressure needle valve 29; The pressure needle valve 29 is connected to the gas cylinder and the air-controlled needle valve A33; the water inlet of the flow meter 34 is connected to the air-controlled needle valve A33, and the water outlet of the flow meter 34 is connected to the test outlet 39; the air source inlet of the air-controlled needle valve A33 is connected to the air source outlet of the solenoid valve D31; the air-controlled needle valve B37 is installed in a bypass, and the two ends of the bypass are respectively located between the gas cylinder 27 and the high-pressure needle valve 29 and between the flow meter 34 and the test outlet 39; the air source inlet of the air-controlled needle valve B37 is connected to the air source outlet of the solenoid valve C30; one end of the air-controlled needle valve C38 is connected to the test outlet 39, and the other end is connected to the ball valve B16 through the return pipe 24, and the air source inlet of the air-controlled needle valve C38 is connected to the air source outlet of the solenoid valve E32; the pressure transmitter 35 is installed between the flow meter 34 and the test outlet 39.

[0033] Furthermore, the solenoid water valve A9, liquid level meter 11, solenoid water valve B13, and solenoid valve A17 are connected to the electrical module 2 through cable A19, and quick-plug connectors are used at the joints; the water pump 14 is connected to the electrical module 2 through the water pump power cord 23, and a quick-plug connector is used at one end connected to the electrical module; the solenoid valve B25, solenoid valve C30, solenoid valve D31, and solenoid valve E32 are connected to the electrical module 2 through cable B20, and quick-plug connectors are used at the joints.

[0034] Furthermore, the electrical control module 100, the boost module 200, and the measuring module 300 are all designed as a box structure, and each box module is designed with a handrail, which can be used for pushing and carrying to ensure that it can be passed through narrow passages; the bottom of the box of each module is designed with casters 40, which can be easily carried and transferred.

[0035] The working principle of the gate valve online sealing test device proposed by the embodiment of the present invention is as follows:

[0036] 1. The liquid level gauge in the water tank feeds back the liquid level information in real time. When the liquid level is at the lower limit, the system opens the electromagnetic water valve A and closes the electromagnetic water valve B to replenish the water tank. When the liquid level reaches the upper limit, the system closes the electromagnetic water valve A and opens the electromagnetic water valve B to stop replenishing the water tank.

[0037] 2. Before the test, the test piece needs to be connected, and then all the air-controlled needle valves are opened and the water pump is started to start the water injection and exhaust work, which can ensure the safety and accuracy of the later test process. After the exhaust work is completed, the booster pump is turned on to start pressurization. The system automatically selects the first-level booster pump or the high-pressure booster pump to start working according to the test pressure. Specifically, the first-level booster pump is started when the test pressure is 0.2-10Mpa, and the high-pressure booster pump is started when the test pressure is 10-20Mpa. During the boosting process, the system realizes the stage boosting function by controlling the start and stop action of the booster pump. The pressure transmitter in the system will feedback the outlet pressure of the equipment, that is, the test pressure in real time, and the electrical proportional valve will adjust the intake pressure of the booster pump in real time according to the feedback test pressure, so as to realize the function of maintaining the test pressure and measuring the leakage. The booster pump is a reciprocating gas-liquid booster pump, which will produce certain pressure fluctuations when working. Under the action of the gas cylinder, it can play a certain role in stabilizing pressure and absorbing pressure fluctuations.

[0038] 3. When leakage measurement is required, the system keeps the air-controlled needle valve A open, closes the air-controlled needle valve B and the air-controlled needle valve C, and allows the medium to pass through the flow meter. At this time, the flow meter will feed back the instantaneous flow and cumulative flow information to the electrical module and display it on the computer for recording and storage, and finally obtain the test leakage result. When the pressure drop needs to be measured, the system opens the air-controlled needle valve B, closes the air-controlled needle valve A and the air-controlled needle valve C, and when the test pressure is reached, close the air-controlled needle valve B. The pressure transmitter feeds back the pressure parameters to the electrical module and displays it on the computer for recording. After the test is completed, the pressure drop value can be automatically calculated.

[0039] After the test, the system can realize the staged pressure relief function by controlling the action of the air-controlled needle valve C, and the medium re-enters the water tank through the return pipe. The computer automatically generates a test report at the end of the test, and the test report can be printed out immediately on site through the printer.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gate valve online sealing test device, comprising an electrical control module (100), a booster module (200), and a measurement module (300), characterized in that: The boosting module (200) comprises an air source inlet (4), a water source inlet (5), an air source pressure regulating valve (6), a pressure gauge A (7), an electric proportional valve (8), an electromagnetic water valve A (9), a water tank (10), a liquid level gauge (11), a ball valve A (12), an electromagnetic water valve B (13), a water pump (14), a filter (15), a ball valve B (16), an electromagnetic valve A (17), and a first-stage boosting pump (18); The measuring module (300) comprises a solenoid valve B (25), a high-pressure booster pump (26), a gas cylinder (27), a pressure gauge B (28), a high-pressure needle valve (29), a solenoid valve C (30), a solenoid valve D (31), a solenoid valve E (32), an air-controlled needle valve A (33), a flow meter (34), a pressure transmitter (35), a pressure gauge C (36), an air-controlled needle valve B (37), an air-controlled needle valve C (38), and a test outlet (39); The inlet end of the gas source pressure regulating valve (6) is connected to the gas source inlet (4); the pressure gauge A (7) is connected to the outlet end of the gas source pressure regulating valve (6); the inlet end of the electric proportional valve (8) is connected to the outlet end of the gas source pressure regulating valve (6), and the outlet end of the electric proportional valve (8) is respectively connected to the gas source inlet ends of the solenoid valve A (17) and the solenoid valve B (25); A liquid level gauge (11) is provided inside the water tank (10); the electromagnetic water valve A (9) is connected to the water source inlet (5) and the ball valve A (12); the electromagnetic water valve B (13) is connected to the ball valve A (12) and the water inlet of the water pump (14); the air source inlet of the primary booster pump (18) is connected to the air source outlet of the electromagnetic valve A (17); The water outlet of the high-pressure booster pump (26) is connected to the gas cylinder (27), and the gas source inlet of the high-pressure booster pump (26) is connected to the gas source outlet of the solenoid valve B (25) to provide and compensate pressure for the system; the pressure gauge B (28) is installed between the gas cylinder (27) and the high-pressure needle valve (29); the high-pressure needle valve (29) is connected to the gas cylinder and the air-controlled needle valve A (33); the water inlet of the flow meter (34) is connected to the air-controlled needle valve A (33), and the water outlet of the flow meter (34) is connected to the test outlet (39); The air source inlet of the air-controlled needle valve A (33) is connected to the air source outlet of the solenoid valve D (31); one end of the air-controlled needle valve B (37) is located between the gas cylinder (27) and the high-pressure needle valve (29), and the other end is located between the flow meter (34) and the pressure transmitter (35); the air source inlet of the air-controlled needle valve B (37) is connected to the air source outlet of the solenoid valve C (30); one end of the air-controlled needle valve C (38) is connected to the test outlet (39), and the other end is connected to the ball valve B (16) through the return pipe (24); When measuring the leakage, the system keeps the air-controlled needle valve A (33) open, closes the air-controlled needle valve B (37) and the air-controlled needle valve C (38), and allows the medium to pass through the flow meter (34). At this time, the flow meter (34) will feed back the instantaneous flow rate and the accumulated flow rate information to the electrical control module (100) for display, recording and storage, and finally obtain the test leakage result; When it is necessary to measure the pressure drop, the system opens the air-controlled needle valve B (37) and closes the air-controlled needle valve A (33) and the air-controlled needle valve C (38). When the test pressure is reached, the air-controlled needle valve B (37) is closed again. The pressure transmitter (35) feeds back the pressure parameters to the electrical control module (100) for display and recording. After the test is completed, the pressure drop value can be automatically calculated.

2. The gate valve online sealing test device according to claim 1 is characterized in that: The electromagnetic water valve A (9), the liquid level meter (11), the electromagnetic water valve B (13), and the electromagnetic valve A (17) are connected to the electrical module (2) via a cable A (19), and quick-connect connectors are used at the joints; the water pump (14) is connected to the electrical module (2) via a water pump power cable (23), and a quick-connect connector is used at one end connected to the electrical module.

3. The gate valve online sealing test device according to claim 2 is characterized in that: The solenoid valve B (25), the solenoid valve C (30), the solenoid valve D (31), and the solenoid valve E (32) are connected to the electrical module (2) via the cable B (20), and quick-connect connectors are used at the joints.

4. The gate valve online sealing test device according to claim 3 is characterized in that: The electrical control module (100), the boost module (200), and the measuring module (300) are all designed as box structures, and each box module is provided with a handrail for pushing and carrying, and the electrical control module (100), the boost module (200), and the measuring module (300) are all provided with casters (40) at the bottom.

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