Performance test system for valve seat sealing element of water inlet ball valve of water turbine

Abstract

The invention relates to the technical field of sealing element testing, and discloses a water turbine water inlet ball valve seat sealing element performance testing system which comprises a testing device body, a sealing pressure maintaining testing system and a starting pressure testing and reciprocating action testing system. The system can comprehensively and accurately test the sealing performance of the water turbine water inlet ball valve seat sealing element by simulating the actual motion trail of the water turbine water inlet ball valve seat sealing element, and provides a reliable basis for model selection and use of the water turbine water inlet ball valve seat sealing element. Through cooperative work of all the subsystems, the system has the advantages of being easy and convenient to operate and maintain, high in testing efficiency, accurate and reliable in testing result and high in system stability, and the performance testing requirement of the water turbine water inlet ball valve seat sealing element is met.

Description

Technical Field

[0001] The invention relates to the technical field of sealing component testing, and in particular to a performance testing system for a valve seat sealing component of a water turbine water inlet ball valve. Background Art

[0002] The turbine is one of the important electromechanical equipment in a hydropower station. In order to ensure the safe and reliable operation of the turbine, an inlet ball valve is installed at the water inlet of the turbine. The valve seat seal is a key part of the inlet ball valve, and its performance directly affects the sealing effect and service life of the ball valve, thereby affecting the safety and efficiency of the entire turbine. Therefore, it is necessary to perform a performance test on the valve seat seal of the turbine inlet ball valve. At present, there is a lack of a test system on the market that can accurately and reliably test the performance of the valve seat seal of the turbine inlet ball valve. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a turbine water inlet ball valve seat seal performance testing system, which can simulate the movement of the turbine water inlet ball valve seat seal in actual operation, meet the needs of turbine water inlet ball valve seat seal performance testing, and achieve the advantages of simple operation and maintenance, high testing efficiency, accurate and reliable test results, and high system stability.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A performance test system for a valve seat seal of a water turbine water inlet ball valve comprises a test device body, a starting pressure test and a reciprocating action test system, and a sealing pressure maintenance test system.

[0006] Furthermore, the test device body includes a movable ring support plate, a movable sealing ring, and a movable ring pressure plate.

[0007] Furthermore, the movable sealing ring is provided with three sealing grooves, and the movable sealing ring is installed above the groove of the movable ring support plate.

[0008] The movable ring pressure plate is installed above the movable ring support plate and the movable sealing ring, and the movable ring support plate and the movable ring pressure plate are assembled through stud nuts.

[0009] Pressure inlet and outlet 1, pressure inlet and outlet 2, pressure inlet and outlet 3, and pressure inlet and outlet 4 are arranged above the movable ring support plate.

[0010] A plug is respectively provided below the left end surface of the moving ring support plate and below the right end surface of the moving ring pressure plate. The plug can be used for leak detection after being replaced with a leak detection device.

[0011] Furthermore, three seals can be installed in the three sealing grooves on the movable sealing ring, and the three seals cooperate with the movable ring support plate and the movable ring pressure plate to form two sealed cavities in the cavity of the main body of the test device.

[0012] Furthermore, the starting pressure test and reciprocating motion test system includes a water source, a water pump and a shut-off valve external to the water source, the water pump outlet is connected to a return valve, the return valve is connected to the pipeline between the shut-off valve and the water source, the shut-off valve is connected to a branch pipe male threaded ferrule three-way joint, the ferrule three-way joint is connected to a pressure gauge valve 1 and a pressure gauge 1, and is connected to one end of a control solenoid valve through an external stainless steel pipe, the other end of the control solenoid valve is connected to a return water tank through an external stainless steel pipe, the lower end of the control solenoid valve is connected to two high-pressure hoses with conversion joints, the other ends of the two high-pressure hoses with conversion joints are respectively connected to high-pressure shut-off valve 1 and high-pressure shut-off valve 2, the solenoid valve control line of the control solenoid valve is connected to a test control cabinet, the test control cabinet has two mobile signal detection lines, and each mobile signal detection line is connected to a signal switching sensor block.

[0013] Furthermore, the high-pressure cut-off valve 1 and the high-pressure cut-off valve 2 are respectively connected to the pressure inlet and outlet 1 and the pressure inlet and outlet 2 above the movable ring support plate, so as to pressurize and reduce the pressure of the sealing chamber through the starting pressure test and the reciprocating motion test system.

[0014] The two signal switching sensing blocks are respectively fixedly connected to the upper left end surface of the moving ring support plate and the upper right end surface of the moving ring pressure plate, and are used to detect the axial movement of the moving sealing ring. The control solenoid valve reverses the inlet and outlet direction of the pressure according to the signal to realize the reciprocating movement of the moving sealing ring.

[0015] Furthermore, the sealing pressure maintaining test system includes a booster pump, which is connected to a ferrule male thread conversion joint through a hose, the ferrule male thread conversion joint is connected to a double ferrule one-way valve, the double ferrule one-way valve is connected to a main pipe male thread ferrule three-way joint, the ferrule three-way joint is connected to a pressure gauge valve 2 and a pressure gauge 2, and is externally connected to a high-pressure shut-off valve 5, the other end of the high-pressure shut-off valve 5 is connected to a double ferrule three-way joint, and the other two ends of the double ferrule three-way joint are respectively connected to a high-pressure shut-off valve 3 and a high-pressure shut-off valve 4.

[0016] Furthermore, the high-pressure cut-off valve 3 and the high-pressure cut-off valve 4 are respectively connected to the pressure inlet and outlet 3 and the pressure inlet and outlet 4 above the movable ring support plate, so as to pressurize the sealing cavity through the sealing pressure maintaining test system to realize the pressure maintaining sealing test.

[0017] The effects of the present invention are:

[0018] The present invention provides a test system for the performance of the valve seat seal of the water turbine inlet ball valve, which pressurizes or reduces the pressure of two sealing chambers through a pressure test and a reciprocating motion test system, and simultaneously sets two signal switching induction blocks axially for detecting the axial movement of the mobile sealing ring. After the control solenoid valve receives the position signal of the mobile sealing ring, the inlet and outlet directions of the pressure can be reversed according to the signal to realize the reciprocating motion of the mobile sealing ring. At the same time, a pressure gauge is set in the pressure test and reciprocating motion test system, which can detect the pressure value when the mobile sealing ring starts to move, and realize the start-up pressure test.

[0019] At the same time, the present invention provides a test system for the performance of a turbine water inlet ball valve seat seal. The sealing cavity is pressurized by the sealing pressure test system, and a pressure-maintaining sealing test can be achieved after the plug is replaced with a leak detection device.

[0020] The present invention provides a testing system specifically for the performance of a valve seat seal of a water turbine inlet ball valve, which can simulate the movement trajectory of the seal in actual work, accurately and reliably test the sealing performance of the seal, and can test multiple test items after one assembly, thereby improving the testing efficiency and simplifying the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Explanation of the reference numerals: 1—movable ring support plate, 2—movable sealing ring, 3—plug 1, 4—plug 2, 5—movable ring pressure plate, 6—stud nut, 7—sealed chamber 1, 8—sealed chamber 2, 9—water source, 10—water pump, 11—return valve, 12—shut-off valve, 13—pressure gauge 1, 14—pressure gauge valve 1, 15—branch pipe male threaded sleeve three-way connector, 16—stainless steel pipe, 17—control solenoid valve, 18—conversion connector, 19—high-pressure hose, 20—high-pressure shut-off valve 1, 21—high High-pressure shut-off valve 2, 22—signal switching sensor block 1, 23—moving signal detection line, 24—signal switching sensor block 2, 25—return pool, 26—test control cabinet, 27—solenoid valve control line, 28—high-pressure shut-off valve 3, 29—high-pressure shut-off valve 4, 30—double ferrule three-way joint, 31—high-pressure shut-off valve 5, 32—main pipe male thread ferrule three-way joint, 33—pressure gauge 2, 34—pressure gauge valve 2, 35—double ferrule one-way valve, 36—ferrule male thread conversion joint, 37—boosting pump.

[0023] Figure 2 It is a partial enlarged structural schematic diagram of the main body of the test device of the present invention;

[0024] Description of reference numerals: 1-1—pressure inlet and outlet 1, 1-2—pressure inlet and outlet 2, 1-3—pressure inlet and outlet 3, 1-4—pressure inlet and outlet 4, 2-1—sealing groove 1, 2-2—sealing groove 2, 2-3—sealing groove 3 DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, working mechanism, purpose and effect achieved by the present invention easy to understand, the technical scheme and working mechanism in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0026] like Figure 1 , Figure 2 As shown, a turbine water inlet ball valve seat seal performance test system includes a test device body, a start-up pressure test and reciprocating action test system, and a seal pressure maintenance test system.

[0027] Furthermore, the main body of the test device includes a movable ring support plate 1 , a movable sealing ring 2 , and a movable ring pressure plate 5 .

[0028] Furthermore, the movable sealing ring 2 is provided with a sealing groove 12 - 1 , a sealing groove 22 - 2 , and a sealing groove 32 - 3 , and the movable sealing ring 2 is installed above the groove of the movable ring support plate 1 .

[0029] The movable ring pressure plate 5 is installed above the movable ring support plate 1 and the movable sealing ring 2 , and the movable ring support plate 1 and the movable ring pressure plate 5 are assembled by means of stud nuts 6 .

[0030] The movable ring support plate 1 is provided with a pressure inlet and outlet 11 - 1 , a pressure inlet and outlet 21 - 2 , a pressure inlet and outlet 31 - 3 , and a pressure inlet and outlet 41 - 4 above the movable ring support plate 1 .

[0031] A plug 13 and a plug 24 are respectively provided below the left end surface of the movable ring support plate 1 and below the right end surface of the movable ring pressure plate 5. The plugs can be used for leak detection after being replaced with leak detection devices.

[0032] Furthermore, three seals can be installed in the sealing groove 12-1, the sealing groove 22-2 and the sealing groove 32-3 on the movable sealing ring 2, and the three seals cooperate with the movable ring support plate 1 and the movable ring pressure plate 5 to form a sealing cavity 17 and a sealing cavity 28 in the cavity of the main body of the test device.

[0033] Furthermore, the start-up pressure test and reciprocating action test system includes a water source 9, the water source 9 is externally provided with a water pump 10 and a shut-off valve 12, the outlet of the water pump 10 is connected to a return valve 11, the return valve 11 is connected to the pipeline between the shut-off valve 12 and the water source 9, the shut-off valve 12 is connected to a branch pipe male threaded ferrule tee joint 15, the ferrule tee joint is connected to a pressure gauge valve 114 and a pressure gauge 113, and is connected to one end of a control solenoid valve 17 through an external stainless steel pipe 16, and the other end of the control solenoid valve 17 is connected to an external stainless steel pipe 16. The steel pipe 16 is connected to the return water tank 25, and the lower end of the control solenoid valve 17 is connected to two high-pressure hoses 19 with conversion joints 18, and the other ends of the two high-pressure hoses 19 with conversion joints 18 are respectively connected to the high-pressure shut-off valve 120 and the high-pressure shut-off valve 221, and the solenoid valve control line 27 of the control solenoid valve 17 is connected to the test control cabinet 26, and the test control cabinet 26 has two mobile signal detection lines 23, and each mobile signal detection line 23 is respectively connected to the signal switching sensor block 122 and the signal switching sensor block 224.

[0034] Furthermore, the high-pressure cut-off valve 120 and the high-pressure cut-off valve 221 are respectively connected to the pressure inlet and outlet 11-1 and the pressure inlet and outlet 21-2 above the movable ring support plate 1, so as to pressurize and reduce the pressure of the sealing chamber through the starting pressure test and reciprocating motion test system.

[0035] The signal switching sensing block 122 and the signal switching sensing block 224 are respectively fixedly connected to the upper left end surface of the moving ring support plate 1 and the upper right end surface of the moving ring pressure plate 5, and are used to detect the axial movement of the moving sealing ring 2. The control solenoid valve 17 reverses the inlet and outlet direction of the pressure according to the signal to realize the reciprocating movement of the moving sealing ring.

[0036] Furthermore, the sealing pressure test system includes a booster pump 37, and the booster pump 37 is connected to a ferrule male thread conversion joint 36 through a hose. The ferrule male thread conversion joint 36 is connected to a double ferrule one-way valve 30, and the double ferrule one-way valve 30 is connected to a main pipe male thread ferrule three-way joint 32. The main pipe male thread ferrule three-way joint 32 is connected to a pressure gauge valve 234 and a pressure gauge 233, and is externally connected to a high-pressure shut-off valve 531. The other end of the high-pressure shut-off valve 531 is connected to the double ferrule three-way joint 30, and the other two ends of the double ferrule three-way joint 30 are respectively connected to a high-pressure shut-off valve 328 and a high-pressure shut-off valve 429.

[0037] Furthermore, the high-pressure cut-off valve 328 and the high-pressure cut-off valve 429 are respectively connected to the pressure inlet and outlet 31-3 and the pressure inlet and outlet 41-4 above the movable ring support plate 1, so as to pressurize the sealing chamber 17 or the sealing chamber 28 through the sealing pressure maintaining test system to realize the pressure maintaining sealing test.

[0038] The following article focuses on the working mechanism of the turbine inlet ball valve seat seal performance test system.

[0039] When the seal needs to be tested for starting pressure and reciprocating motion, it is necessary to close the high-pressure shut-off valve 328 and the high-pressure shut-off valve 429 or close the high-pressure shut-off valve 531, power on the test control cabinet 26, open the high-pressure shut-off valve 1, the high-pressure shut-off valve 2, the pressure gauge valve 114, the shut-off valve 12, and the return valve 11 to be in the fully open state, power on the water pump 10, and start the starting pressure and reciprocating motion test.

[0040] The starting pressure can be read by the pressure curve on the system or by observing the pressure value displayed on the control system when the mobile sealing ring 2 moves, and the value is recorded.

[0041] When water enters from the high-pressure shut-off valve 120 and flows out from the high-pressure shut-off valve 221 to the return water tank 25, the pressure in the sealing chamber 17 is increased, and the mobile sealing ring 2 moves to the left. When the mobile sealing ring 2 touches the signal switching sensing block 122, the signal is transmitted to the control solenoid valve 17, and the control solenoid valve 17 controls the water flow to reverse in and out, so that water enters from the high-pressure shut-off valve 221 and flows out from the high-pressure shut-off valve 120 to the return water tank 2. At this time, the pressure in the sealing chamber 28 is increased, and the mobile sealing ring 2 moves to the right. When the mobile sealing ring 2 touches the signal switching sensing block 224, the signal is transmitted to the control solenoid valve 17 again, and the control solenoid valve 17 controls the water flow to reverse in and out, thereby realizing the test of reciprocating action.

[0042] When the seal needs to be tested for pressure-sealing, the high-pressure cut-off valve 120 and the high-pressure cut-off valve 221 need to be closed, and the high-pressure cut-off valve 532 needs to be opened. When the sealing chamber 17 is tested for pressure-sealing, the high-pressure cut-off valve 429 needs to be closed, and the plug 13 needs to be replaced with a leak detection device. After the above preparations are completed, the booster pump 37 is started, and the pressure is increased step by step and the sealing leakage is observed until the specified pressure-sealing pressure is reached. When the sealing chamber 28 is tested for pressure-sealing, the high-pressure cut-off valve 328 needs to be closed, and the plug 24 needs to be replaced with a leak detection device.

[0043] According to the above basic working principle, various modifications and improvements can be made on the basis of this structure. These innovative transformation structures based on this structure also fall within the protection scope of the present invention.

[0044] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A turbine inlet ball valve seat seal performance test system, characterized in that: The sealing performance testing system comprises a testing device body, a starting pressure test and reciprocating motion test system, and a sealing pressure maintaining test system.

2. A turbine inlet ball valve seat seal performance test system according to claim 1, characterized in that: The test device body comprises a moving ring supporting plate, a moving sealing ring and a moving ring pressing plate.

3. A turbine inlet ball valve seat seal performance test system according to claim 2, characterized in that: The movable sealing ring is provided with three sealing grooves, and the movable sealing ring is installed above the groove of the movable ring support plate; The movable ring pressure plate is installed above the movable ring support plate and the movable sealing ring, and the movable ring support plate and the movable ring pressure plate are assembled by stud nuts; The movable ring support plate is provided with pressure inlet and outlet 1, pressure inlet and outlet 2, pressure inlet and outlet 3, and pressure inlet and outlet 4; A plug is respectively provided below the left end surface of the moving ring support plate and below the right end surface of the moving ring pressure plate. The plug can be used for leak detection after being replaced with a leak detection device.

4. A turbine inlet ball valve seat seal performance test system according to claim 3, characterized in that: The three sealing grooves on the movable sealing ring can be equipped with three sealing members, and the three sealing members cooperate with the movable ring support plate and the movable ring pressure plate to form two sealing cavities in the cavity of the main body of the test device.

5. A turbine inlet ball valve seat seal performance test system according to claim 1, characterized in that: The starting pressure test and reciprocating action test system includes a water source, a water pump and a shut-off valve external to the water source, the water pump outlet is connected to a return valve, the return valve is connected to the pipeline between the shut-off valve and the water source, the shut-off valve is connected to a branch pipe male threaded ferrule three-way joint, the ferrule three-way joint is connected to a pressure gauge valve 1 and a pressure gauge 1, and is connected to one end of a control solenoid valve through an external stainless steel pipe, the other end of the control solenoid valve is connected to a return water tank through an external stainless steel pipe, the lower end of the control solenoid valve is connected to two high-pressure hoses with conversion joints, the other ends of the two high-pressure hoses with conversion joints are respectively connected to high-pressure shut-off valve 1 and high-pressure shut-off valve 2, the solenoid valve control line of the control solenoid valve is connected to a test control cabinet, the test control cabinet has two mobile signal detection lines, and each mobile signal detection line is connected to a signal switching sensor block.

6. A turbine inlet ball valve seat seal performance testing system according to any one of claims 1 to 5, characterized in that: The high-pressure shut-off valve 1 and the high-pressure shut-off valve 2 are respectively connected to the pressure inlet and outlet 1 and the pressure inlet and outlet 2 above the movable ring support plate, so as to pressurize and reduce the pressure of the sealing chamber through the start-up pressure test and reciprocating motion test system; The two signal switching sensing blocks are respectively fixedly connected to the upper left end surface of the moving ring support plate and the upper right end surface of the moving ring pressure plate, and are used to detect the axial movement of the moving sealing ring. The control solenoid valve reverses the inlet and outlet direction of the pressure according to the signal to realize the reciprocating movement of the moving sealing ring.

7. A turbine inlet ball valve seat seal performance test system according to claim 1, characterized in that: The sealing pressure-maintaining test system includes a booster pump, which is connected to a ferrule male thread conversion joint through a hose, the ferrule male thread conversion joint is connected to a double ferrule one-way valve, the double ferrule one-way valve is connected to a main pipe male thread ferrule three-way joint, the ferrule three-way joint is connected to a pressure gauge valve 2 and a pressure gauge 2, and is externally connected to a high-pressure shut-off valve 5, the other end of the high-pressure shut-off valve 5 is connected to a double ferrule three-way joint, and the other two ends of the double ferrule three-way joint are respectively connected to a high-pressure shut-off valve 3 and a high-pressure shut-off valve 4.

8. A turbine inlet ball valve seat seal performance testing system according to any one of claims 1 to 5, characterized in that: The high-pressure shut-off valve 3 and the high-pressure shut-off valve 4 are respectively connected to the pressure inlet and outlet 3 and the pressure inlet and outlet 4 above the movable ring support plate, so as to pressurize the sealing cavity through the sealing pressure maintaining test system to realize the pressure maintaining sealing test.

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