A seal test tool for the contact surface between a marine valve and a valve disc

Abstract

The present invention relates to the technical field of sealing detection, and in particular to a sealing test tool for the contact surface of a marine valve and a valve disc, which can detect the sealing performance of the valve when vibrating, simulates the working environment of the valve when used on a ship, and has high detection accuracy and reliability; the tool comprises a base plate, an air pump, an air pipe, a sealing valve and a pressure gauge, wherein the air pump is fixedly mounted on the upper end of the base plate, the input end of the air pipe is connected to the output end of the air pump, the output end of the air pipe is provided with a joint, the air pipe is provided with a pressure gauge, and the sealing valve is mounted on the air pipe; the tool also comprises a vibrating device, a rotating device and a clamping device, wherein the vibrating device is mounted on the base plate, the rotating device is mounted on the vibrating device, the clamping device is mounted on the rotating device, the vibrating device is used to vibrate the rotating device, and the rotating device is used to rotate the clamping device.

Description

Technical Field

[0001] The invention relates to the technical field of sealing detection, in particular to a sealing test tool for the contact surface of a marine valve and a valve disc. Background Art

[0002] A valve is a piping accessory used to open and close pipelines, control flow direction, and regulate and control the flow of fluids. It is widely used in various fields, including chemical engineering, machinery, and transportation. In particular, valves installed on the sides or bottom of a ship below the light waterline, also known as "submarine valves," are operated and closed by a handwheel or a transmission mechanism on the deck. This valve controls the flow of water from outside to the vessel, depending on navigational needs, for purposes such as cleaning and cooling equipment. When the valve is closed, the valve disc seals against the contact surface. When the valve is open, the disc separates from the valve. In other words, the valve relies on the opening and closing of the disc to control fluid flow. Therefore, the sealing performance of the disc-to-valve contact surface is crucial to valve quality. Therefore, testing the sealing performance of the disc-to-valve contact surface is essentially testing the valve's sealing performance.

[0003] After searching, it was found that in the prior art, there are many devices for detecting the sealing of valves, such as patent application numbers "CN202022173787.5", "CN201821760122.0" and "CN201620172523.9". Although these devices can detect the sealing of valves, the valves are in a stationary state when performing the sealing test. In actual use, valves used on ships are sometimes shaken and bumped by waves during navigation at sea. The valves on the ship will also shake and bump with the ship. Under the action of shaking and bumping, the valve disc inside the valve may loosen due to the loose connection with the valve, which will cause the contact surface sealing between the valve disc and the valve to decrease, and then cause water to enter the valve. Therefore, in order to ensure the safety of the ship during navigation, it is required that the contact surface between the valve disc and the valve used on the ship can still maintain good sealing when the valve is vibrating. Therefore, a detection tool is needed to detect the sealing of the contact surface between the valve disc and the valve when the valve is vibrating. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a sealing test tool for the contact surface of marine valves and valve discs that can detect the sealing of valves when they vibrate, simulating the working environment of the valves when they are used on ships, and has high detection accuracy and reliability.

[0005] The sealing test tool for the contact surface of a marine valve and a valve disc of the present invention comprises a base plate, an air pump, an air pipe, a sealing valve and a pressure gauge, wherein the air pump is fixedly mounted on the upper end of the base plate, the input end of the air pipe is connected to the output end of the air pump, the output end of the air pipe is provided with a joint, the air pipe is provided with a pressure gauge, and the sealing valve is mounted on the air pipe; the tool also comprises a vibrating device, a rotating device and a clamping device, wherein the vibrating device is mounted on the base plate, the rotating device is mounted on the vibrating device, the clamping device is mounted on the rotating device, the vibrating device is used to vibrate the rotating device, and the rotating device is used to rotate the clamping device; first, the marine valve to be tested is clamped and fixed by the clamping device, then the valve disc on the valve is closed, and then the joint on the air pipe is connected to the The input end of the valve is connected to the seal, and then the air pump is turned on. The air pump inflates the valve through the air pipe, and then the reading on the pressure gauge is observed and recorded. After the reading on the pressure gauge reaches the specified pressure, the sealing valve is closed, and then the air pump is turned off. Then the vibration device is turned on. The vibration device vibrates the valve up and down through the rotating device, and then waits for a period of time. If the gas pressure value displayed on the pressure gauge does not change, it means that the valve is well sealed, which means that the sealing of the contact surface between the valve and the valve disc is good, otherwise the sealing is poor. When the valve is tested for sealing, the valve can be tested for sealing under vibration, which simulates the working environment of the valve when it is used on a ship, and the detection accuracy and reliability are high.

[0006] Preferably, the vibration device includes multiple groups of elastic telescopic rods, multiple groups of springs, support plates, dual-axis motors, two groups of drive shafts, two groups of fixed plates, two groups of eccentric disks, two groups of rollers and two groups of connecting blocks, the lower ends of the multiple groups of elastic telescopic rods are fixedly mounted on the base plate, the lower ends of the multiple groups of springs are fixedly mounted on the base plate, the multiple groups of springs are sleeved on the multiple groups of elastic telescopic rods, the support plates are fixedly mounted on the upper ends of the multiple groups of springs and the multiple groups of elastic telescopic rods, the dual-axis motor is fixedly mounted on the upper end of the base plate, the input ends of the two drive shafts are respectively connected to the two output ends of the dual-axis motor, the two drive shafts are respectively rotatably mounted on the two fixed plates, the two fixed plates are fixedly mounted on the upper end of the base plate, the two groups of eccentric disks are respectively fixedly mounted on the two drive shafts, the two groups of eccentric disks are respectively eccentrically connected to the two drive shafts, and the upper ends of the two groups of eccentric disks are respectively connected to the two The lower ends of the two groups of rollers are tightly contacted, and the two groups of rollers are rotatably installed on the two groups of connecting blocks. The two groups of connecting blocks are fixedly installed on the left and right parts of the lower end of the support plate. Multiple groups of springs are in a stretched state, and the rotating device is installed on the upper end of the support plate. When the valve is tested for sealing, the dual-axis motor is turned on, and the dual-axis motor drives the two groups of drive shafts to rotate, and the two groups of drive shafts drive the two groups of eccentric disks to rotate. Since the two groups of eccentric disks are eccentrically connected to the two groups of drive shafts, the two groups of eccentric disks will cause the two groups of rollers to vibrate up and down periodically during the process of rotating around the two groups of drive shafts. The two groups of rollers make the support plate vibrate up and down through the two groups of connecting blocks, and the support plate makes the clamping device drive the valve to vibrate up and down through the rotating device. It simulates the real working environment of the valve when it is used on a ship, so that the valve can be tested for sealing in a vibrating state, with high reliability.

[0007] Preferably, the rotating device includes two groups of support plates, two groups of rotating shafts, a support platform and a motor A. The two groups of support plates are respectively fixedly mounted on the left and right parts of the upper end of the support plates, and the two groups of rotating shafts are respectively rotatably mounted on the two groups of support plates. The two groups of rotating shafts are coaxial, and the support platform is fixedly mounted on the two groups of rotating shafts. The left end of the left rotating shaft is connected to the output end of the motor A, and the motor A is fixedly mounted on the left support plate, and the clamping device is mounted on the support platform; when the valve is vibrated, the motor A is turned on, and the motor A rotates the support platform through the rotating shaft, and the support platform rotates the valve through the clamping device, so that the valve rotates to different angles for vibration; during the driving process of the ship, it will not only bump up and down, but also shake left and right or back and forth, so the valve used on the ship will also vibrate in various directions. In this detection device, by rotating the valve, it can simulate the situation where the valve maintains sealing when vibrating in different directions, which is closer to the driving environment of the ship and has high practicality and reliability.

[0008] Preferably, the clamping device includes two groups of plywood A, two groups of plywood B and four groups of bolts A, the two groups of plywood A are respectively fixedly mounted on the left and right parts of the upper end of the support platform, the upper parts of the two groups of plywood A are each provided with two groups of threaded holes, the two groups of plywood B are respectively located at the upper ends of the two groups of plywood A, the two groups of plywood B are respectively provided with two groups of through holes, the four groups of bolts A respectively penetrate the through holes on the two groups of plywood B and are screwed together with the four groups of threaded holes on the two groups of plywood A; the left and right parts of the valve are placed on the two groups of plywood A, and then the two groups of plywood B are respectively placed on the upper sides of the left and right parts of the valve, and then the four groups of bolts A respectively penetrate the through holes on the two groups of plywood B, and the four groups of bolts A are respectively screwed together with the four groups of threaded holes on the two groups of plywood A, so that the two groups of plywood B press the valve to the two groups of plywood A, which is convenient for clamping and fixing the valve and is easy to use.

[0009] Preferably, it also includes two groups of positioning shafts and multiple groups of bolts B. The left and right parts of the two groups of driving shafts are provided with positioning shafts, and the two groups of positioning shafts are fixedly installed on the two groups of driving shafts respectively. Multiple groups of threaded holes are provided on the two groups of driving shafts, and two groups of eccentric disks are provided with two groups of eccentric positioning holes, and multiple groups of through holes are provided around the two groups of eccentric positioning holes. The two groups of positioning shafts are respectively inserted into one group of positioning holes of the two groups of eccentric disks, and the multiple groups of bolts B pass through the multiple groups of through holes of the two groups of eccentric disks and are screwed onto the multiple groups of threaded holes of the driving shafts. The multiple groups of bolts B press the two groups of eccentric disks tightly and fix them on the two groups of driving shafts respectively; because the eccentric disk is provided with two groups of positioning holes, and the distances between the two groups of positioning holes and the center of the eccentric disk are not the same The same, the degree of eccentricity is different, so the eccentricity of the connection between the drive shaft and the eccentric disk can be selected according to the actual situation. When testing the valve used on the ocean-going ship, the vibration amplitude of the valve is large when it is working, so the positioning shaft is inserted into the positioning hole with large eccentricity on the eccentric disk, and then the drive shaft is fixedly connected to the eccentric disk, thereby making the vibration amplitude of the valve large. When testing the valve used on the ship in the inland lake, the vibration amplitude of the valve is small when it is working, so the positioning shaft is inserted into the positioning hole with small eccentricity on the eccentric disk, and then the drive shaft is fixedly connected to the eccentric disk, thereby making the vibration amplitude of the valve smaller. The vibration state of the valve can be rotated according to the application situation. It is easy to use and has few limitations.

[0010] Preferably, the lower ends of the two groups of clamping plates B are provided with rubber pads; through the above arrangement, the two groups of clamping plates B are prevented from crushing the valve, thereby improving the reliability of the valve during use.

[0011] Preferably, the motor A is a servo motor with angular self-locking capability; through the above arrangement, the motor A can keep the support platform in a certain posture through the rotating shaft, thereby improving the reliability during the detection process.

[0012] Preferably, the surface of the eccentric disk is provided with a wear-resistant coating; through the above arrangement, the service life of the eccentric disk is increased.

[0013] Compared with the prior art, the present invention has the following advantages: it can detect the sealing performance of the valve when it vibrates, simulates the working environment of the valve when it is used on a ship, and has high detection accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the base plate, spring and elastic telescopic rod;

[0015] Figure 2 It is a structural diagram of the dual-axis motor, motor A and support platform;

[0016] Figure 3 It is an axonometric structural diagram of the present invention;

[0017] Figure 4 It is an axonometric structural diagram of the present invention;

[0018] Figure 5 It is a schematic diagram of the structure of the splint A, splint B and bolt A;

[0019] Figure 6 yes Figure 2 A schematic diagram of the partially enlarged structure at point A in the middle;

[0020] Figure 7 It is a schematic diagram of the main structure of the present invention;

[0021] Markings in the accompanying drawings: 1. Base plate; 2. Air pump; 3. Air pipe; 4. Sealing valve; 5. Pressure gauge; 6. Valve; 7. Elastic telescopic rod; 8. Spring; 9. Support plate; 10. Dual-axis motor; 11. Drive shaft; 12. Fixed plate; 13. Eccentric disk; 14. Roller; 15. Connecting block; 16. Support plate; 17. Rotating shaft; 18. Support platform; 19. Motor A; 20. Clamp A; 21. Clamp B; 22. Bolt A; 23. Positioning shaft; 24. Bolt B. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] like Figures 1 to 7As shown, the air pump 2 is fixedly mounted on the upper end of the base plate 1, the input end of the air pipe 3 is connected to the output end of the air pump 2, the output end of the air pipe 3 is provided with a joint, the air pipe 3 is provided with a pressure gauge 5, the sealing valve 4 is installed on the air pipe 3, the lower ends of the multiple groups of elastic telescopic rods 7 are fixedly mounted on the base plate 1, the lower ends of the multiple groups of springs 8 are fixedly mounted on the base plate 1, the multiple groups of springs 8 are sleeved on the multiple groups of elastic telescopic rods 7, the support plate 9 is fixedly mounted on the upper ends of the multiple groups of springs 8 and the multiple groups of elastic telescopic rods 7, the dual-axis motor 10 is fixedly mounted on the upper end of the base plate 1, the input ends of the two groups of drive shafts 11 are respectively connected to the two groups of output ends of the dual-axis motor 10, the two groups of drive shafts 11 are respectively rotatably mounted on the two groups of fixed plates 12, the two groups of fixed plates 12 are fixedly mounted on the upper end of the base plate 1, the two groups of eccentric disks 13 are respectively fixedly mounted on the two groups of drive shafts 11, the two groups of eccentric disks 13 are respectively eccentrically connected to the two groups of drive shafts 11, and the upper ends of the two groups of eccentric disks 13 are respectively connected to the two groups of rollers The lower end of 14 is in tight contact, the two sets of rollers 14 are rotatably mounted on the two sets of connecting blocks 15, the two sets of connecting blocks 15 are fixedly mounted on the left and right parts of the lower end of the support plate 9, the multiple sets of springs 8 are in a stretched state, the two sets of support plates 16 are fixedly mounted on the left and right parts of the upper end of the support plate 9, the two sets of rotating shafts 17 are rotatably mounted on the two sets of support plates 16, the two sets of rotating shafts 17 are coaxial, the support platform 18 is fixedly mounted on the two sets of rotating shafts 17, and the left end of the left rotating shaft 17 is connected to the motor The output end of A19 is connected, the motor A19 is fixedly mounted on the left support plate 16, and the two groups of plywood A20 are respectively fixedly mounted on the left and right parts of the upper end of the support platform 18. The upper parts of the two groups of plywood A20 are each provided with two groups of threaded holes, and the two groups of plywood B21 are respectively located at the upper ends of the two groups of plywood A20. Two groups of through holes are each provided on the two groups of plywood B21, and four groups of bolts A22 respectively penetrate the through holes on the two groups of plywood B21 and are screwed into the four groups of threaded holes on the two groups of plywood A20.

[0024] The left and right parts of the two groups of drive shafts 11 are both provided with positioning shafts 23, and the two groups of positioning shafts 23 are respectively fixedly installed on the left and right ends of the two groups of drive shafts 11. The left and right parts of the two groups of drive shafts 11 are both provided with multiple groups of threaded holes. The two groups of eccentric disks 13 are both provided with two groups of eccentric positioning holes, and multiple groups of through holes are provided around the two groups of eccentric positioning holes. The two groups of positioning shafts 23 are respectively inserted into a group of positioning holes of the two groups of eccentric disks 13, and multiple groups of bolts B24 penetrate through the multiple groups of through holes of the two groups of eccentric disks 13 and are screwed with the multiple groups of threaded holes of the drive shaft 11. The multiple groups of bolts B24 press the two groups of eccentric disks 13 tightly and fix them on the two groups of drive shafts 11.

[0025] The sealing test tool for the contact surface between a marine valve and a valve disc of the present invention is as follows: when working, first, the left and right parts of the marine valve 6 to be tested are placed on two sets of clamping plates A20, and then two sets of clamping plates B21 are respectively placed on the upper sides of the left and right parts of the valve 6, and then four sets of bolts A22 are respectively passed through the through holes on the two sets of clamping plates B21, and the four sets of bolts A22 are respectively screwed into the four sets of threaded holes on the two sets of clamping plates A20, so that the two sets of clamping plates B21 press the valve 6 to the two sets of clamping plates A20, and then the valve 6 is closed. Then, turn on the valve disc on the air pipe 3, and then connect the joint on the air pipe 3 to the input end of the valve 6 for sealing. Then, turn on the air pump 2, and the air pump 2 will inflate the valve 6 through the air pipe 3. Then, observe and record the reading on the pressure gauge 5. When the reading on the pressure gauge 5 reaches the specified pressure, close the sealing valve 4, and then turn off the air pump 2. Then, turn on the dual-axis motor 10. The dual-axis motor 10 drives the two sets of drive shafts 11 to rotate. The two sets of drive shafts 11 drive the two sets of eccentric disks 13 to rotate. Since the two sets of eccentric disks 13 and the two sets of drive shafts 11 are eccentric, the two sets of eccentric disks 13 and the two sets of drive shafts 11 are eccentric. The two sets of eccentric disks 13 are connected, so the two sets of rollers 14 will vibrate up and down periodically during the process of rotating around the two sets of drive shafts 11. The two sets of rollers 14 make the support plate 9 vibrate up and down through the two sets of connecting blocks 15. The support plate 9 makes the two sets of rotating shafts 17 drive the support platform 18 to vibrate up and down through the two sets of supporting plates 16. The support platform 18 makes the valve 6 vibrate up and down through the two sets of clamping plates A20. After waiting for a while, the motor A19 is turned on. The motor A19 rotates the support platform 18 through the rotating shaft 17. The support platform 18 rotates through the two sets of clamping plates A20. Plate A20 rotates the valve 6 and makes the valve 6 vibrate at different angles. Then, it waits for a while and observes the value on the pressure gauge 5. If the gas pressure value displayed on the pressure gauge 5 remains unchanged, it means that the sealing of the valve 6 is good, which means that the sealing of the contact surface between the valve 6 and the valve disc is good. Otherwise, the sealing is poor. When testing the sealing performance of the valve 6, the valve 6 can be tested for sealing performance under vibration, simulating the working environment of the valve 6 when it is used on a ship. The detection accuracy and reliability are high.

[0026] Since two groups of positioning holes are provided on the eccentric disk 13, and the two groups of positioning holes are at different distances from the center of the eccentric disk 13, and the degree of eccentricity is different, the degree of eccentricity of the connection between the drive shaft 11 and the eccentric disk 13 can be selected according to actual conditions. When the valve 6 used on the ocean-going ship is tested, the vibration amplitude of the valve 6 is large during operation, so the positioning shaft 23 is inserted into the positioning hole with a large degree of eccentricity on the eccentric disk 13, and then the drive shaft 11 is fixedly connected to the eccentric disk 13, thereby increasing the vibration amplitude of the valve 6. When the valve 6 used on the ship in the inland lake is tested, the vibration amplitude of the valve 6 is small during operation, so the positioning shaft 23 is inserted into the positioning hole with a small degree of eccentricity on the eccentric disk 13, and then the drive shaft 11 is fixedly connected to the eccentric disk 13, thereby decreasing the vibration amplitude of the valve 6. The vibration state of the valve 6 can be rotated according to the application situation of the valve 6. It is easy to use and has low limitations.

[0027] The main functions achieved by the present invention are:

[0028] 1. It can detect the sealing performance of the contact surface between the valve 6 and the valve disc under different vibration directions, and truly simulate the working environment of the marine valve 6. It has high reliability and practicality, and the test results are reliable.

[0029] 2. The vibration amplitude of the valve 6 during detection can be adjusted according to the valve 6 used on different ships, which is convenient to use.

[0030] 3. Since it can detect the sealing of valves under vibration conditions, it is also suitable for detecting valves on aircraft and has low limitations.

[0031] The sealing test tool for the contact surface of a marine valve and a valve disc of the present invention has common mechanical installation, connection or setting methods, and can be implemented as long as it can achieve its beneficial effects; the air pump 2, sealing valve 4, pressure gauge 5, elastic telescopic rod 7, dual-axis motor 10, positioning shaft 23 and bolt B24 of the sealing test tool for the contact surface of a marine valve and a valve disc of the present invention are all purchased on the market, and technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to pay creative labor.

[0032] All technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention pertains. In the description of the present invention, unless otherwise expressly specified or limited, the terms "set," "install," "connect," "connect," and "fix" should be understood in a broad sense, for example, they may refer to fixed connections, detachable connections, or integrated connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal connections between two elements or interactions between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention will be understood according to the specific circumstances.

[0033] The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A seal test fixture for the contact surface between a marine valve and a valve disc, comprising a base plate (1), an air pump (2), an air pipe (3), a sealing valve (4) and a pressure gauge (5), wherein the air pump (2) is fixedly mounted on the upper end of the base plate (1), the input end of the air pipe (3) is connected to the output end of the air pump (2), the output end of the air pipe (3) is provided with a joint, the air pipe (3) is provided with a pressure gauge (5), and the sealing valve (4) is mounted on the air pipe (3); characterized in that: It also includes a vibration device, a rotating device and a clamping device, the vibration device is installed on the base plate (1), the rotating device is installed on the vibration device, and the clamping device is installed on the rotating device. The vibration device is used to vibrate the rotating device, and the rotating device is used to rotate the clamping device. The vibration device comprises a plurality of sets of elastic telescopic rods (7), a plurality of sets of springs (8), a support plate (9), a dual-axis motor (10), two sets of drive shafts (11), two sets of fixed plates (12), two sets of eccentric disks (13), two sets of rollers (14) and two sets of connecting blocks (15). The lower ends of the plurality of sets of elastic telescopic rods (7) are fixedly mounted on the bottom plate (1), the lower ends of the plurality of sets of springs (8) are fixedly mounted on the bottom plate (1), the plurality of sets of springs (8) are sleeved on the plurality of sets of elastic telescopic rods (7), the support plate (9) is fixedly mounted on the upper ends of the plurality of sets of springs (8) and the plurality of sets of elastic telescopic rods (7), the dual-axis motor (10) is fixedly mounted on the upper end of the bottom plate (1), the input ends of the two sets of drive shafts (11) are connected to the dual-axis motor (10) and ... The two output ends of the motor (10) are connected, the two drive shafts (11) are rotatably mounted on the two fixed plates (12), the two fixed plates (12) are fixedly mounted on the upper end of the bottom plate (1), the two eccentric discs (13) are fixedly mounted on the two drive shafts (11), the two eccentric discs (13) are eccentrically connected to the two drive shafts (11), the upper ends of the two eccentric discs (13) are in tight contact with the lower ends of the two rollers (14), the two rollers (14) are rotatably mounted on the two connecting blocks (15), the two connecting blocks (15) are fixedly mounted on the left and right parts of the lower end of the support plate (9), the multiple springs (8) are in a stretched state, and the rotating device is mounted on the upper end of the support plate (9); The rotating device comprises two groups of support plates (16), two groups of rotating shafts (17), a support platform (18) and a motor A (19). The two groups of support plates (16) are fixedly mounted on the left and right parts of the upper end of the support plate (9), respectively. The two groups of rotating shafts (17) are rotatably mounted on the two groups of support plates (16), respectively. The two groups of rotating shafts (17) are coaxial. The support platform (18) is fixedly mounted on the two groups of rotating shafts (17). The left end of the left rotating shaft (17) is connected to the output end of the motor A (19). The motor A (19) is fixedly mounted on the left support plate (16). The clamping device is mounted on the support platform (18).

2. A seal test fixture for the contact surface between a marine valve and a valve disc as claimed in claim 1, characterized in that: The clamping device includes two groups of clamps A (20), two groups of clamps B (21) and four groups of bolts A (22). The two groups of clamps A (20) are fixedly mounted on the left and right parts of the upper end of the support platform (18), and the upper parts of the two groups of clamps A (20) are provided with two groups of threaded holes. The two groups of clamps B (21) are respectively located at the upper ends of the two groups of clamps A (20). The two groups of clamps B (21) are respectively provided with two groups of through holes. The four groups of bolts A (22) respectively penetrate the through holes on the two groups of clamps B (21) and the four groups of threaded holes on the two groups of clamps A (20) and are screwed.

3. A seal test tool for the contact surface between a marine valve and a valve disc as claimed in claim 1, characterized in that: The invention also includes two groups of positioning shafts (23) and multiple groups of bolts B (24). The left and right parts of the two groups of drive shafts (11) are both provided with positioning shafts (23). The two groups of positioning shafts (23) are respectively fixedly mounted on the two groups of drive shafts (11). The two groups of drive shafts (11) are both provided with multiple groups of threaded holes. The two groups of eccentric disks (13) are both provided with two groups of eccentric positioning holes, and multiple groups of through holes are provided around the two groups of eccentric positioning holes. The two groups of positioning shafts (23) are respectively inserted into one group of positioning holes of the two groups of eccentric disks (13). The multiple groups of bolts B (24) penetrate the multiple groups of through holes of the two groups of eccentric disks (13) and are screwed with the multiple groups of threaded holes of the drive shafts (11). The multiple groups of bolts B (24) respectively press and fix the two groups of eccentric disks (13) on the two groups of drive shafts (11).

4. A seal test tool for the contact surface between a marine valve and a valve disc as claimed in claim 2, characterized in that: The lower ends of the two groups of splints B (21) are both provided with rubber pads.

5. The seal test fixture for the contact surface between a marine valve and a valve disc according to claim 1, characterized in that: The motor A (19) is a servo motor with angular self-locking capability.

6. A seal test tool for the contact surface between a marine valve and a valve disc as claimed in claim 1, characterized in that: The surface of the eccentric disc (13) is provided with a wear-resistant coating.

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