A sealing detection device and detection method for marine valves

Abstract

The invention discloses a sealing detection device and a detection method for marine valves, and relates to the technical field of marine valve detection. The invention comprises a detection groove arranged on a sealing detection frame, wherein the valve to be detected is placed in the detection groove. The invention raises a slide plate, so that the slide plate can be conveniently dropped to hit the valve to be detected, and then a first motor is turned on and one of the electromagnets is energized to rotate a plurality of rotating shafts. Since only one of the electromagnets is energized, one of the nuts can drive a connecting piece and a striking plate to move downward, and then the slide plate drives the striking plate to fall freely and hit the valve to be detected, so that sealing detection can be performed after simulating a reef impact, thereby improving the detection effect. According to the above principle, more and more electromagnets are turned on in sequence, so that a plurality of striking pieces and striking plates can be simultaneously dropped, thereby increasing the impact area, thereby simulating reefs of different sizes to impact the valve to be detected, thereby further improving the detection effect.

Description

Technical Field

[0001] The present invention relates to the technical field of marine valve detection, in particular to a marine valve sealing detection device and a marine valve sealing detection method. Background Art

[0002] Marine valves are specially designed to control the pressure, flow and flow direction of fluids in ship pipelines to meet the ship's environmental conditions. These valves are important control devices for ship fluid pipelines. Their basic functions include connecting or disconnecting the flow of pipeline media, changing the flow direction of the media, adjusting the pressure and flow of the media, and protecting the normal operation of pipeline equipment, such as stop valves, regulating valves, check valves, safety valves, etc. These valves are basic valves for various systems on ships and can meet general fluid control needs.

[0003] In order to ensure the quality of the existing marine valves after production, they are usually tested for sealing, so a valve sealing test device is needed. When in use, water is injected into the closed valve, and then the valve drain or other areas are observed to see if there is leakage. However, it is far from enough to just test the sealing of the finished valve. Since the driving environment of some ships is relatively complex and there are many reefs in the water or on the shore, it is inevitable that the ship will collide with the reefs when driving in such an environment. The valve is generally partially exposed outside the hull, which makes the reef directly collide with the valve body. If the valve leaks after the collision, it will accelerate the sinking speed of the hull. Therefore, if the existing marine valve sealing test device cannot simulate the sealing test after the valve is hit, the sealing test effect will be reduced.

[0004] Therefore, we have designed a sealing detection device and a detection method for marine valves to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a sealing detection device and a detection method for marine valves to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides a sealing detection device for marine valves, comprising a detection groove arranged on a sealing detection frame, the detection groove is used to place the valve to be detected, a hidden groove is opened on the sealing detection frame, a slide plate is slidably connected in the hidden groove, two rotating shafts are symmetrically arranged on both sides of the bottom of the slide plate, two L-shaped frames are fixedly installed at the bottom of the slide plate, two threaded screw rods are symmetrically arranged on the L-shaped frame, an iron sheet and an electromagnet are fixedly installed at one end of the threaded screw rod opposite to the rotating shaft, the iron sheet and the electromagnet are abutted against each other and are magnetically connected, and the threaded screw rod is fixedly installed at one end of the threaded screw rod opposite to the rotating shaft, and the iron sheet and the electromagnet are respectively abutted against each other and are magnetically connected. A nut is threadedly mounted on the rod, a connecting piece is fixedly installed on one side of the nut, an impact piece is provided at the other end of the connecting piece, a plurality of the impact pieces are abutted against each other, two impact plates are provided at the bottom of the impact piece, a first gear is fixedly mounted on the rotating shaft, a transmission shaft is rotatably connected to the bottom of the slide plate, a second gear is fixedly mounted on the other end of the transmission shaft, the second gear is meshingly connected to the first gear, a first motor is fixedly mounted on the top of the slide plate, a driving shaft of the first motor is transmission-connected to one end of the transmission shaft, and a driving component for driving the impact plate to impact the valve to be detected is provided in the hidden groove.

[0007] Furthermore, the driving assembly includes a limiting roller, which is rotatably connected in a hidden groove, and two ropes are symmetrically wrapped around the limiting roller, and the two ends of the ropes are respectively fixedly connected to the limiting roller and the top of the slide plate, and a second motor is fixedly installed on one side of the sealing detection frame, and the driving shaft of the second motor is transmission-connected to one end of the limiting roller.

[0008] Furthermore, a stopper is fixedly installed in the hidden groove, and the stopper abuts against the top of the slide plate.

[0009] Furthermore, a bidirectional screw is rotatably provided at the bottom of the impact member, and two sliders are symmetrically threaded on the bidirectional screw, and a guide rod is inserted in the slider, and both ends of the guide rod are arranged in the impact member, and a motor is provided on one side of the sealing detection frame, and the driving shaft of the motor is transmission-connected to one end of the bidirectional screw, the slider is spaced apart and connected to the impact plate, and the two impact plates are rotatably connected.

[0010] Furthermore, a mounting seat is provided at the top of the sliding block, a rotating member is rotatably provided in the mounting seat, a fixed seat is provided at the bottom of the impact plate, and the other end of the rotating member is rotatably provided in the fixed seat.

[0011] Furthermore, a first pin is fixedly disposed in the mounting seat, a second pin is fixedly disposed in the fixing seat, and two ends of the rotating member are rotatably sleeved on the first pin and the second pin respectively.

[0012] Furthermore, a fixing groove is provided at the bottom of the impact member, the bidirectional screw is rotatably connected in the fixing groove, the slider is slidably connected in the fixing groove, both ends of the guide rod are fixedly installed in the fixing groove, a mounting groove is provided on one side of the impact member, the motor is embedded in the mounting groove, and a first pin shaft is inserted at the intersection of the two impact plates.

[0013] Furthermore, two electric push rods are symmetrically installed at the bottom of the sealing detection frame, and the driving end of the electric push rod is provided with a hemispherical seat. The top of the hemispherical seat is provided with an adjustment groove, and an adjustment ball is rotatably clamped in the adjustment groove. The top of the adjustment ball is fixedly connected to the bottom of the detection groove.

[0014] Furthermore, it also includes a positioning monitoring component for positioning and sealing monitoring of the valve to be inspected, the positioning monitoring component includes two electric telescopic rods, the electric telescopic rods are arranged on one side of the inspection slot and an L-shaped plate is provided at the driving end, a CCD camera is arranged in the inspection slot, the CCD camera is located below the rear side of the L-shaped plate, and a display screen is arranged on the front side of the sealing inspection frame, and the CCD camera is electrically connected to the display screen.

[0015] The present invention also discloses a method for detecting the sealing performance of a marine valve, which adopts the above-mentioned device for detecting the sealing performance of a marine valve, and comprises the following steps:

[0016] S1: First, place the valve to be inspected between two L-shaped plates, then open two electric telescopic rods respectively, so that the driving end of the electric telescopic rods is extended to drive the L-shaped plates to clamp the valve to be inspected, then turn on the second motor to rotate the limit roller and wind the rope around the limit roller, so that the slide plate is against the stopper, then turn on the first motor and energize one of the electromagnets, so that the transmission shaft drives the second gear to rotate, so that the transmission shaft drives multiple first gears and the rotating shaft to rotate. Since only one of the electromagnets is energized, one of the electromagnets will absorb the corresponding iron sheet, so that one of the nuts drives the connecting piece, the impact piece and the impact plate to move downward a certain distance, while the other electromagnets rub against the corresponding iron sheets in situ, and then turn off the second motor. At this time, the driving shaft of the second motor loses its positioning force, so that the slide plate drives the impact plate to fall freely and hit the valve to be inspected. Then, the personnel inject clean water into the valve to be inspected, and cooperate with the CCD camera to detect the sealing condition. According to the above principle, multiple electromagnets are opened in sequence, so that multiple impact plates can also be lowered at the same time, which can increase the impact area, and simulate reefs of different sizes to impact the valve to be inspected, which can further improve the detection effect;

[0017] S2: In S1, after simulating the impact of reefs of different sizes on the valve to be tested, the motor can be turned on to rotate the bidirectional screw rod so that the two sliders are close to each other. During this process, the two rotating parts will drive the impact plate to bend with the first pin as the axis, so that the two impact plates can be combined to form a "triangle" shape. Then, the valve to be tested is continuously impacted according to the above principle, so as to simulate the sealing test of the valve to be tested after the impact of reefs of different sharpness, and further improve the effect of sealing test;

[0018] S3: In addition, in S2, after simulating the sealing test of the valve to be tested after the impact of reefs of different sharpness, the two electric push rods can be turned on to shorten and lengthen the driving ends of the two electric push rods respectively and drive the detection slot to tilt. Since the adjusting ball is set to rotate, the problem of motion interference can be avoided when the detection slot is tilted. Then the impact plate can be used to impact the valve to be tested, which can simulate the effect of the valve hitting the reef obliquely, thereby further improving the effect of sealing detection.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By raising the slide plate, the slide plate can be conveniently dropped to hit the valve to be detected, and then the first motor is turned on and one of the electromagnets is energized to rotate the multiple rotating shafts. Since only one of the electromagnets is energized, one of the nuts can drive the connecting piece and the impact plate to move downward, and then the slide plate drives the impact plate to fall freely and hit the valve to be detected, which can simulate the reef impact to perform sealing detection, thereby improving the detection effect. According to the above principle, the electromagnets are turned on in sequence, so that the multiple impact pieces and the impact plates can be simultaneously dropped, and the impact area can be increased, and the impact of reefs of different sizes on the valve to be detected can be simulated, which can further improve the detection effect.

[0020] 2. By turning on the motor, the bidirectional screw rod can be rotated, so that the two sliders are close to each other. In this process, the two rotating parts will drive the impact plate to bend with the first pin as the axis, so that the two impact plates can be combined to form a "triangle" shape. Then, according to the above principle, the valve to be tested can be continuously impacted, which can simulate the sealing test of the valve to be tested after the impact of reefs of different sharpness, and can further improve the effect of sealing test;

[0021] 3. By turning on the two electric push rods, the driving ends of the two electric push rods can be shortened and extended respectively, driving the detection slot to tilt. Since the adjusting ball is set to rotate, the problem of motion interference can be avoided when the detection slot is tilted. Then the impact plate can impact the valve to be inspected, which can simulate the effect of the valve obliquely hitting the reef, thereby further improving the effect of sealing detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the front exterior of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the interior of the hidden groove of the present invention in a half-section view;

[0024] Figure 3 is a schematic diagram of the three-dimensional structure of the exterior of the second gear of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the outer side of the present invention;

[0026] Figure 5 is a schematic diagram of the three-dimensional structure of the exterior of the second gear of the present invention;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the exterior of the hemispherical seat of the present invention;

[0028] Figure 7 For the present invention Figure 5 Enlarged view of point A in the middle.

[0029] In the figure: 1. sealing detection frame; 2. detection slot; 3. hidden slot; 4. slide plate; 5. rotating shaft; 6. L-shaped frame; 7. threaded screw; 8. iron sheet; 9. electromagnet; 10. nut; 11. connecting piece; 12. impact piece; 13. impact plate; 14. first gear; 15. transmission shaft; 16. second gear; 17. first motor; 18. limit roller; 19. rope; 20. second motor; 21. stopper; 22. two-way screw; 23. slider; 24. motor; 25. mounting seat; 26. rotating piece; 27. fixed seat; 28. first pin shaft; 29. ​​electric push rod; 30. hemispherical seat; 31. adjusting ball; 32. electric telescopic rod; 33. L-shaped plate; 34. CCD camera; 35. display screen. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0031] See also Figure 1-7The present invention provides a technical solution: a sealing detection device for marine valves, comprising a sealing detection frame 1 provided with a detection groove 2, the detection groove 2 is used to place the valve to be detected, a hidden groove 3 is opened on the sealing detection frame 1, a slide plate 4 is slidably connected in the hidden groove 3, two rotating shafts 5 are symmetrically rotated on both sides of the bottom of the slide plate 4, two L-shaped frames 6 are fixedly installed at the bottom of the slide plate 4, two threaded screws 7 are symmetrically rotated on the L-shaped frame 6, an iron sheet 8 and an electromagnet 9 are fixedly installed on the opposite ends of the threaded screw 7 to the rotating shaft 5, the iron sheet 8 and the electromagnet 9 are respectively abutted and magnetically connected, and a nut is threadedly sleeved on the threaded screw 7 10, a connecting piece 11 is fixedly installed on one side of the nut 10, and a striking piece 12 is arranged on the other end of the connecting piece 11, and a plurality of striking pieces 12 are abutted against each other, and two striking plates 13 are arranged at the bottom of the striking piece 12, a first gear 14 is fixedly sleeved on the rotating shaft 5, a transmission shaft 15 is rotatably connected to the bottom of the slide plate 4, a second gear 16 is fixedly installed on the other end of the transmission shaft 15, and the second gear 16 is meshedly connected with the first gear 14, a first motor 17 is fixedly installed on the top of the slide plate 4, and a driving shaft of the first motor 17 is transmission-connected with one end of the transmission shaft 15, and a driving component for driving the striking plate 13 to strike the valve to be detected is arranged in the hidden groove 3;

[0032] The driving assembly includes a limiting roller 18, which is rotatably connected in the hidden groove 3. Two ropes 19 are symmetrically wrapped around the limiting roller 18. The two ends of the ropes 19 are respectively fixedly connected to the limiting roller 18 and the top of the slide plate 4. A second motor 20 is fixedly installed on one side of the sealing detection frame 1, and the driving shaft of the second motor 20 is transmission-connected to one end of the limiting roller 18.

[0033] In the specific implementation, the second motor 20 is turned on to rotate the limit roller 18 and to wind the rope 19 around the limit roller 18, so that the slide plate 4 is against the stopper 21, and then the first motor 17 is turned on and one of the electromagnets 9 is energized, so that the transmission shaft 15 drives the second gear 16 to rotate, so that the transmission shaft 15 drives the multiple first gears 14 and the rotating shaft 5 to rotate. Since only one of the electromagnets 9 is energized, one of the electromagnets 9 will absorb the corresponding iron sheet 8, so that one of the nuts 10 drives the connecting member 11, the impact member 12 and the impact plate 13 to move downward a certain distance. The second motor 20 is then turned off, and the driving shaft of the second motor 20 loses its positioning force, so that the slide plate 4 drives the impact plate 13 to fall freely and hit the valve to be detected. Then, clean water is injected into the valve to be detected, and the sealing condition can be detected by cooperating with the CCD camera 34. According to the above principle, multiple electromagnets 9 are opened in sequence and incrementally, and multiple impact members 12 and impact plates 13 can also be lowered, which can increase the impact area and simulate reefs of different sizes to hit the valve to be detected, so as to further improve the detection effect.

[0034] See also Figure 1-7 A stopper 21 is fixedly installed in the hidden groove 3, and the stopper 21 abuts against the top of the slide plate 4. The sliding distance of the slide plate 4 can be limited to avoid the first motor 17 from colliding with the limiting roller 18, thereby helping to extend the service life of the first motor 17.

[0035] See also Figure 1-7 A bidirectional screw rod 22 is rotatably provided at the bottom of the impact member 12, and two sliders 23 are symmetrically threadedly sleeved on the bidirectional screw rod 22. A guide rod is inserted in the slider 23, and both ends of the guide rod are arranged in the impact member 12. A motor 24 is provided on one side of the sealing detection frame 1, and the driving shaft of the motor 24 is transmission-connected with one end of the bidirectional screw rod 22. The slider 23 is connected to the impact plate 13 with a spacing, and the two impact plates 13 are rotatably connected. A mounting seat 25 is provided on the top of the slider 23, and a rotating member 26 is rotatably provided in the mounting seat 25. A fixed seat 27 is provided at the bottom of the impact plate 13, and the other end of the rotating member 26 is rotatably arranged in the fixed seat 27;

[0036] A first pin is fixedly arranged in the mounting seat 25, a second pin is fixedly arranged in the fixing seat 27, two ends of the rotating member 26 are rotatably sleeved on the first pin and the second pin respectively, a fixing groove is provided at the bottom of the impact member 12, the bidirectional screw rod 22 is rotatably connected in the fixing groove, the slider 23 is slidably connected in the fixing groove, both ends of the guide rod are fixedly installed in the fixing groove, a mounting groove is provided on one side of the impact member 12, the motor 24 is embedded in the mounting groove, and a first pin shaft 28 is inserted at the intersection of the two impact plates 13.

[0037] In the specific implementation, on the basis of the above implementation, after simulating the impact of reefs of different sizes on the valve to be tested, the motor 24 can also be turned on to rotate the bidirectional screw rod 22 so that the two sliders 23 are close to each other. In this process, the two rotating parts 26 will drive the impact plate 13 to bend with the first pin shaft 28 as the axis, so that the two impact plates 13 can be combined to form a "triangle" shape, and then continue to impact the valve to be tested according to the above principle, so as to simulate the sealing detection of the valve to be tested after the impact of reefs of different sharpness, and further improve the effect of sealing detection.

[0038] See also Figure 1-7 Two electric push rods 29 are symmetrically installed at the bottom of the sealing detection frame 1. A hemispherical seat 30 is set at the driving end of the electric push rod 29. An adjustment groove is opened on the top of the hemispherical seat 30. An adjustment ball 31 is rotatably connected in the adjustment groove. The top of the adjustment ball 31 is fixedly connected to the bottom of the detection groove 2.

[0039] In the specific implementation, on the basis of the above implementation, after simulating the sealing test after the valve to be tested is hit by reefs of different sharpness, the two electric push rods 29 can be opened to shorten and lengthen the driving ends of the two electric push rods 29 respectively and drive the detection slot 2 to tilt. Since the adjusting ball 31 is rotatably arranged, the problem of motion interference can be avoided when the detection slot 2 is tilted. Then the impact plate 13 is made to impact the valve to be tested, which can simulate the effect of the valve hitting the reef obliquely, thereby further improving the effect of the sealing test.

[0040] See also Figure 1-7 , and also includes a positioning monitoring component for positioning and sealing monitoring of the valve to be inspected. The positioning monitoring component includes two electric telescopic rods 32, which are arranged on one side of the inspection slot 2 and have an L-shaped plate 33 at the driving end. A CCD camera 34 is arranged in the inspection slot 2, and the CCD camera 34 is located below the rear side of the L-shaped plate 33. A display screen 35 is arranged on the front side of the sealing inspection frame 1, and the CCD camera 34 is electrically connected to the display screen 35.

[0041] In specific implementation, on the basis of the above implementation, before impacting the valve to be inspected, first place the valve to be inspected between the two L-shaped plates 33, and then open the two electric telescopic rods 32 respectively, so that the driving end of the electric telescopic rod 32 is extended to drive the L-shaped plates 33 to clamp the valve to be inspected, which can improve the stability of the valve to be inspected and avoid the problem of the valve to be inspected flying out during impact. After simulating the reef impact on the valve to be inspected, the personnel will inject clean water into the valve to be inspected, and cooperate with the CCD camera 34 to detect its sealing condition.

[0042] In combination with the above-mentioned sealing detection device for marine valves, a sealing detection method for marine valves is provided, which specifically includes the following steps:

[0043] S1: First, place the valve to be tested between the two L-shaped plates 33, then open the two electric telescopic rods 32 respectively, so that the driving end of the electric telescopic rod 32 is extended to drive the L-shaped plate 33 to clamp the valve to be tested, then turn on the second motor 20, so that the limit roller 18 rotates and the rope 19 is wound around the limit roller 18, so that the slide plate 4 is against the stopper 21, then turn on the first motor 17 and energize one of the electromagnets 9, so that the transmission shaft 15 drives the second gear 16 to rotate, so that the transmission shaft 15 drives multiple first gears 14 and the rotating shaft 5 to rotate, because only one of the electromagnets 9 is energized, so that one of the electromagnets 9 will absorb the corresponding iron sheet 8, so that A nut 10 drives the connecting piece 11, the impact piece 12 and the impact plate 13 to move downward a certain distance, while the other electromagnets 9 rub against the corresponding iron sheets 8 in situ, and then the second motor 20 is turned off. At this time, the driving shaft of the second motor 20 loses its positioning force, so that the slide plate 4 drives the impact plate 13 to fall freely and hit the valve to be detected. Then, the personnel inject clean water into the valve to be detected, and cooperate with the CCD camera 34 to detect the sealing condition. According to the above principle, multiple electromagnets 9 are opened in sequence and incrementally, so that multiple impact pieces 12 and impact plates 13 can also fall, which can increase the impact area, and simulate reefs of different sizes to hit the valve to be detected, which can further improve the detection effect;

[0044] S2: In S1, after simulating the impact of different sizes of reefs on the valve to be tested, the motor 24 can be turned on to rotate the bidirectional screw rod 22 so that the two sliders 23 are close to each other. In this process, the two rotating parts 26 drive the impact plate 13 to bend with the first pin shaft 28 as the axis, so that the two impact plates 13 can be combined to form a "triangle" shape. Then, the valve to be tested is continuously impacted according to the above principle, so as to simulate the sealing test of the valve to be tested after the impact of reefs of different sharpness, and further improve the effect of sealing test;

[0045] S3: In addition, in S2, after simulating the sealing test after the valve to be tested is hit by reefs of different sharpness, the two electric push rods 29 can be turned on to shorten and lengthen the driving ends of the two electric push rods 29 respectively and drive the testing slot 2 to tilt. Since the adjusting ball 31 is rotatably arranged, the problem of motion interference can be avoided when the testing slot 2 is tilted. Then the impact plate 13 is made to impact the valve to be tested, which can simulate the effect of the valve hitting the reef obliquely, thereby further improving the effect of the sealing test.

Claims

1. A sealing detection device for marine valves, comprising a sealing detection frame (1) provided with a detection slot (2), wherein the detection slot (2) is used to place a valve to be detected, characterized in that: The sealing detection frame (1) is provided with a hidden groove (3), a slide plate (4) is slidably connected in the hidden groove (3), two rotating shafts (5) are symmetrically arranged on both sides of the bottom of the slide plate (4), two L-shaped frames (6) are fixedly installed at the bottom of the slide plate (4), two threaded screw rods (7) are symmetrically arranged on the L-shaped frames (6), an iron sheet (8) and an electromagnet (9) are respectively fixedly installed on the ends of the threaded screw rods (7) opposite to the rotating shaft (5), the iron sheet (8) and the electromagnet (9) are abutted against and matched with each other in magnetic connection, and a nut (10) is threadedly sleeved on the threaded screw rod (7); A connecting piece (11) is fixedly mounted on one side of the nut (10), and an impact piece (12) is arranged at the other end of the connecting piece (11), and a plurality of the impact pieces (12) are abutted against each other. Two impact plates (13) are arranged at the bottom of the impact piece (12), and a first gear (14) is fixedly sleeved on the rotating shaft (5). A transmission shaft (15) is rotatably connected to the bottom of the slide plate (4), and a second gear (16) is fixedly mounted on the other end of the transmission shaft (15), and the second gear (16) is meshingly connected to the first gear (14). A first motor (17) is fixedly mounted on the top of the slide plate (4), and a driving shaft of the first motor (17) is transmission-connected to one end of the transmission shaft (15). A driving component for driving the impact plate (13) to impact the valve to be detected is arranged in the hidden groove (3).

2. A sealing detection device for marine valves according to claim 1, characterized in that: The driving assembly comprises a limiting roller (18), the limiting roller (18) is rotatably connected in the hidden groove (3), two ropes (19) are symmetrically wound around the limiting roller (18), the two ends of the ropes (19) are respectively fixedly connected to the limiting roller (18) and the top of the slide plate (4), and a second motor (20) is fixedly installed on one side of the sealing detection frame (1), and the driving shaft of the second motor (20) is drivingly connected to one end of the limiting roller (18).

3. A sealing detection device for marine valves according to claim 2, characterized in that: A stopper (21) is fixedly installed in the hidden groove (3), and the stopper (21) abuts against the top of the slide plate (4).

4. A sealing detection device for marine valves as claimed in claim 3, characterized in that: A bidirectional screw rod (22) is rotatably arranged at the bottom of the impact member (12), two sliders (23) are symmetrically threadedly sleeved on the bidirectional screw rod (22), a guide rod is inserted into the slider (23), both ends of the guide rod are arranged in the impact member (12), a motor (24) is arranged on one side of the sealing detection frame (1), a driving shaft of the motor (24) is transmission-connected to one end of the bidirectional screw rod (22), the slider (23) is spaced apart from and connected to the impact plate (13), and the two impact plates (13) are rotatably connected.

5. A sealing detection device for marine valves as claimed in claim 4, characterized in that: A mounting seat (25) is arranged at the top of the slider (23), a rotating member (26) is rotatably arranged in the mounting seat (25), a fixed seat (27) is arranged at the bottom of the impact plate (13), and the other end of the rotating member (26) is rotatably arranged in the fixed seat (27).

6. A sealing detection device for marine valves according to claim 5, characterized in that: A first pin is fixedly disposed in the mounting seat (25), a second pin is fixedly disposed in the fixing seat (27), and two ends of the rotating member (26) are rotatably sleeved on the first pin and the second pin, respectively.

7. A sealing detection device for marine valves according to claim 6, characterized in that: A fixing groove is provided at the bottom of the impact member (12), the bidirectional screw rod (22) is rotatably connected in the fixing groove, the slider (23) is slidably connected in the fixing groove, both ends of the guide rod are fixedly installed in the fixing groove, a mounting groove is provided on one side of the impact member (12), the motor (24) is embedded in the mounting groove, and a first pin shaft (28) is inserted at the intersection of the two impact plates (13).

8. A sealing detection device for marine valves according to claim 7, characterized in that: Two electric push rods (29) are symmetrically mounted at the bottom of the sealing detection frame (1), a hemispherical seat (30) is arranged at the driving end of the electric push rod (29), an adjustment groove is arranged at the top of the hemispherical seat (30), an adjustment ball (31) is rotatably engaged in the adjustment groove, and the top of the adjustment ball (31) is fixedly connected to the bottom of the detection groove (2).

9. A sealing detection device for marine valves according to claim 8, characterized in that: It also includes a positioning monitoring component for positioning and sealing monitoring of the valve to be inspected, the positioning monitoring component including two electric telescopic rods (32), the electric telescopic rods (32) being arranged on one side of the inspection slot (2) and having an L-shaped plate (33) at the driving end, a CCD camera (34) being arranged in the inspection slot (2), the CCD camera (34) being located below the rear side of the L-shaped plate (33), a display screen (35) being arranged on the front side of the sealing inspection frame (1), and the CCD camera (34) being electrically connected to the display screen (35).

10. A method for detecting the sealing performance of a marine valve, characterized in that: The sealing detection device for marine valves according to claim 9 comprises the following steps: S1: First, place the valve to be inspected between two L-shaped plates (33), then open the two electric telescopic rods (32) respectively, so that the driving end of the electric telescopic rod (32) is extended to drive the L-shaped plate (33) to clamp the valve to be inspected, then turn on the second motor (20), so that the limit roller (18) rotates and the rope (19) is wound around the limit roller (18), so that the slide plate (4) and the stopper (21) are against each other, then turn on the first motor (17) and energize one of the electromagnets (9), so that the transmission shaft (15) drives the second gear (16) to rotate, so that the transmission shaft (15) drives the multiple first gears (14) and the rotating shaft (5) to rotate, and since only one of the electromagnets (9) is energized, one of the electromagnets (9) will absorb the corresponding iron sheet (8 ), so that one of the nuts (10) drives the connecting piece (11), the impact piece (12) and the impact plate (13) to move downward a certain distance, while the other electromagnets (9) rub against the corresponding iron sheet (8) in situ, and then the second motor (20) is turned off. At this time, the driving shaft of the second motor (20) loses its positioning force, so that the slide plate (4) drives the impact plate (13) to fall freely and hit the valve to be tested. Then, personnel inject clean water into the valve to be tested, and cooperate with the CCD camera (34) to detect the sealing condition. According to the above principle, multiple electromagnets (9) are opened in sequence and incremented, so that multiple impact pieces (12) and impact plates (13) can also fall, which can increase the impact area, simulate reefs of different sizes to hit the valve to be tested, and further improve the detection effect; S2: In S1, after the valve to be tested is tested by simulating the impact of rocks of different sizes on it, the motor (24) can be turned on to rotate the bidirectional screw rod (22) so that the two sliders (23) are close to each other. During this process, the two rotating parts (26) drive the impact plate (13) to bend with the first pin shaft (28) as the axis, so that the two impact plates (13) are combined to form a "triangle" shape. Then, the valve to be tested is continuously impacted according to the above principle, so that the sealing test of the valve to be tested after the impact of rocks of different sharpness can be simulated, and the effect of the sealing test can be further improved; S3: In addition, in S2, after simulating the sealing test after the valve to be tested is hit by rocks of different sharpness, the two electric push rods (29) can be turned on to shorten and lengthen the driving ends of the two electric push rods (29) respectively and drive the testing slot (2) to tilt. Since the adjusting ball (31) is arranged to rotate, the problem of motion interference can be avoided when the testing slot (2) is tilted. Then, the impact plate (13) is made to impact the valve to be tested, so as to simulate the effect of the valve hitting the rock obliquely, thereby further improving the sealing test effect.

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