Deep sea ball valve for realizing soft dismounting valve seat sealing pair

Abstract

The application provides a deep-sea ball valve for gently assembling and disassembling a valve seat sealing pair, and belongs to the technical field of ball valves.The deep-sea ball valve for gently assembling and disassembling a valve seat sealing pair comprises a valve body, a valve cover and a valve core, the inside of the valve body is provided with a clamping mechanism, the clamping mechanism comprises two valve seats which are symmetrically arranged and are slidably connected to the inner wall of the valve body, before the valve core is installed, hydraulic oil is injected into a hydraulic chamber, the hydraulic oil gradually fills the hydraulic chamber and enters a hydraulic cylinder through a flow guide pipe, a piston plate is driven to move away from a cylinder cover, liquid pressure is increased, the two valve seats are driven to move towards corresponding spring seats, when reaching a limit position, the valve core is put in, then an adjusting rod is rotated again, a piston rod in the hydraulic cylinder is slowly moved towards the cylinder cover, the liquid pressure is reduced, first and second elastic members are elastically reset, the valve seats are driven to contact the valve core, low-pressure sealing is realized, and gentle assembly of a sealing system is realized.

Description

Technical Field

[0001] This invention belongs to the field of ball valve technology, specifically relating to a deep-sea ball valve that enables smooth disassembly and assembly of the valve seat sealing pair. Background Technology

[0002] A ball valve is a fluid control valve whose core feature is the use of a spherical valve core with a central hole to control the flow or regulation of fluid. Deep-sea ball valves are special ball valves designed for the extreme high pressure, strong corrosion, low temperature and highly reliable sealing environments of the deep sea. Their core purpose is to control and isolate the fluid medium in deep-sea equipment or pipelines. Deep-sea ball valves are divided into two types in terms of valve body structure: side-mounted and top-mounted. Among them, the middle flange of the top-mounted type does not bear the tensile and compressive stress of the pipeline, and the sealing effect is more stable. Therefore, the top-mounted type is more commonly used in deep-sea ball valves.

[0003] Chinese patent application CN202510295698.2 discloses a deep-sea ball valve that solves the problem of not being able to control the pipeline in a timely manner after the operator reaches the preset position. The valve includes a valve body with a control box fixedly connected to its top. A valve stem is rotatably connected inside the valve body, and a valve ball adapted to the valve body is fixedly connected to the bottom end of the valve stem. A worm gear located inside the control box is fixedly connected to the top end of the valve stem. A worm gear meshing with the worm gear is rotatably connected inside the control box. A fixed plate is fixedly mounted on the worm gear, and a first gear groove is formed on the fixed plate. A first gear is located in the first gear groove. A first rotating shaft is rotatably connected to the control box, and a reset unit adapted to the first gear is installed on the first rotating shaft. This invention controls the rotation of the worm gear through a manual switching structure. The worm gear drives the valve stem and valve ball to rotate to the preset position via the worm gear. Then, the operator can replace or repair the drive mechanism, thus enabling timely control of the pipeline.

[0004] However, existing top-entry ball valves mostly use mechanical transmission and have a small operating space inside the valve. In order to achieve low-pressure pre-tightening of the sealing pair, it is necessary to strike the round nut that fits the external thread of the valve seat. During the striking process, the debris of the round nut will fall into the valve cavity. The debris may scratch the sealing surface and cause leakage. During the striking process, the round nut will undergo irreversible deformation, making the valve stuck. There is a very obvious jerking sensation when striking the valve seat and the ball, which can easily cause mutual abrasion between the sealing surfaces. Moreover, in deep-sea applications, the ball valve may need to be opened or closed under huge pressure. The extremely high pressure will significantly increase the friction between the ball and the valve seat, making it difficult for the valve core to open and close, affecting its use.

[0005] Therefore, in order to solve the above problems, there is a need to provide a deep-sea ball valve that allows for smooth disassembly and assembly of the valve seat sealing pair. Summary of the Invention

[0006] The purpose of this invention is to provide a deep-sea ball valve that allows for smooth assembly and disassembly of the valve seat sealing pair. This addresses the problems of existing top-entry ball valves, which often employ mechanical transmission and have limited internal operating space. To achieve low-pressure pre-tightening of the sealing pair, the valve seat's externally threaded round nut needs to be struck. During this striking process, debris from the round nut falls into the valve cavity, potentially scratching the sealing surface and causing leakage. The round nut also undergoes irreversible deformation during striking, causing the valve to become stuck. The striking process produces a very noticeable abrupt change in feel between the valve seat and the ball, easily leading to mutual abrasion between the sealing surfaces. Furthermore, in deep-sea applications, the ball valve may need to be opened or closed under immense pressure. This extremely high pressure significantly increases the friction between the ball and the valve seat, making it difficult for the valve core to open and close, thus affecting its usability.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A deep-sea ball valve that enables smooth assembly and disassembly of the valve seat sealing pair includes a valve body, a valve cover, and a valve core:

[0009] The valve body is equipped with a snap-fit ​​mechanism, which includes two symmetrically arranged valve seats that are slidably connected to the inner wall of the valve body. The valve core seal can be adjusted by moving the two valve seats.

[0010] Preferably, each of the two valve seats has a sliding groove on one side corresponding to each other. Each sliding groove has a cover that is slidably and sealed to the inner wall of the valve body. The outer wall of each cover can form a hydraulic chamber with the inner wall of the corresponding sliding groove. By injecting hydraulic oil into the hydraulic chamber, the position of the valve seat can be adjusted.

[0011] Preferably, each of the two valve seats has a limiting seat that is slidably connected to the inner wall of the valve body on its opposite side, and each limiting seat has a spring seat that is fixedly connected to the inner wall of the valve body on its side away from the valve seat.

[0012] Preferably, each valve seat has a first mounting groove on the side near the limiting seat, and a first elastic element is connected between the inner wall of each first mounting groove and the corresponding limiting seat, and there are at least two first elastic elements. Each spring seat has a second mounting groove on the side near the limiting seat, and a second elastic element is connected between each second mounting groove and the corresponding limiting seat, and there are at least two second elastic elements.

[0013] Preferably, a hydraulic cylinder is fixedly connected to the outer wall of the valve body, a piston plate is movably connected inside the hydraulic cylinder, a cylinder cover is fixedly connected to the side of the hydraulic cylinder away from the valve body, an adjusting rod is rotatably sealed inside the cylinder cover, one end of the adjusting rod is fixedly connected to a connecting rod fixedly connected to the piston plate, and a drive wheel is fixedly connected to the end of the adjusting rod away from the connecting rod. Rotating the drive wheel can drive the connecting rod and the adjusting rod to rotate synchronously. When the adjusting rod rotates, it can adjust the movement of the piston plate inside the hydraulic cylinder.

[0014] Preferably, the outer wall of the connecting rod is slidably connected to a movable plate that is slidably and sealingly connected to the inner wall of the hydraulic cylinder. The piston plate has a receiving cavity inside, and the receiving cavity has a flow channel that communicates with the guide pipe. The receiving cavity is slidably and sealingly connected to an air extraction plate. A connecting ring is fixedly connected between the air extraction plate and the movable plate. The outer wall of the connecting ring is slidably and sealingly connected to the piston plate, and the inner wall of the connecting ring is slidably connected to the connecting rod.

[0015] Preferably, the movable plate has an adjustment groove on the side near the piston plate, the adjustment groove can form a water storage cavity with the inner wall of the hydraulic cylinder, and a third elastic element is provided between the movable plate away from the piston plate and the cylinder head, the third elastic element being sleeved on the outer wall of the connecting rod and the adjusting rod.

[0016] Preferably, the outer wall of the hydraulic cylinder is provided with two one-way solenoid valves, and external liquid can enter the water storage chamber through one of the one-way solenoid valves, while the liquid inside the water storage chamber can be discharged to the outside through the other one-way solenoid valve. A limiting ring is provided inside the side of the hydraulic cylinder away from the cylinder head.

[0017] Preferably, the outer wall of the hydraulic cylinder is fixedly connected to two guide pipes, and the other end of the two guide pipes is connected to the two hydraulic chambers in a one-to-one correspondence. Each hydraulic chamber is provided with an inlet groove that is connected to the outside. The hydraulic cylinder is provided with a drain groove. Each inlet groove and the drain groove are provided with a screw plug.

[0018] Preferably, a sealing ring is provided inside each of the two valve seats on the corresponding side.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention, through the setting of valve seats, allows the hydraulic system to inject hydraulic oil into the hydraulic chamber before installing the valve core. The hydraulic oil gradually fills the hydraulic chamber and enters the hydraulic cylinder through the guide pipe, subsequently driving the piston plate to move away from the cylinder head. The liquid pressure increases, pushing the two valve seats towards their corresponding spring seats. When the valve core reaches its limit position, it is inserted. Then, the adjusting rod is rotated again, causing the piston rod in the hydraulic cylinder to slowly move towards the cylinder head, reducing the liquid pressure. The first and second elastic elements elastically reset, pushing the valve seat to contact the valve core, achieving low-pressure sealing and smooth assembly of the sealing system. By changing mechanical transmission to hydraulic transmission, it avoids the problem of debris scratching the sealing surface and causing leakage during the hammering process, prevents irreversible deformation of the round nut during the hammering process, avoids axial movement jamming of the valve seat, and avoids mutual abrasion between the sealing surfaces caused by the impact.

[0021] This invention, through the setting of a movable plate, controls the switching of two one-way solenoid valves before the valve core opens or closes, allowing seawater to enter the water storage chamber through the corresponding one-way solenoid valves. This pushes the movable plate away from the piston plate, causing the suction plate to compress the gas inside the receiving chamber, increasing the pressure in the two hydraulic chambers, and to a certain extent pushing the two valve seats towards the corresponding spring seats. The first elastic element can compress, reducing the degree of compression between the valve seat and the valve core, and reducing friction. On the one hand, this facilitates the opening and closing of the valve core, and on the other hand, it reduces the wear of the valve seat and the valve core, thus improving service life. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a front view of the overall structure of the present invention;

[0024] Figure 2 This is a side view of the overall structure of the present invention;

[0025] Figure 3 This is a top view of the overall structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the snap-fit ​​mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of the valve body of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the hydraulic cylinder of the present invention;

[0029] Figure 7 For the present invention Figure 4Enlarged view of the structure of section A in the middle;

[0030] Figure 8 This is a schematic diagram of the internal structure of the hydraulic cylinder of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged view of the structure of section B in the middle;

[0032] Figure 10 For the present invention Figure 5 Enlarged view of the structure of section C.

[0033] In the diagram: 1. Valve body; 2. Valve cover; 3. Valve core; 4. Snap-fit ​​mechanism; 41. Valve seat; 42. Slide groove; 43. Cover; 44. Hydraulic chamber; 45. Limiting seat; 46. Spring seat; 47. First mounting groove; 48. First elastic element; 49. Second mounting groove; 410. Second elastic element; 411. Liquid inlet groove; 412. Screw plug; 413. Sealing ring; 5. Hydraulic cylinder; 51. Piston plate; 52. Cylinder cover; 53. Adjusting rod; 54. Connecting rod; 55. Drive wheel; 56. Moving plate; 57. Receiving cavity; 58. Drainage groove; 59. Air extraction plate; 510. Connecting ring; 511. Adjusting groove; 512. Water storage cavity; 513. Third elastic element; 514. One-way solenoid valve; 515. Guide pipe; 516. Drainage groove; 517. Limiting ring. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Existing top-entry ball valves mostly use mechanical transmission and have a small operating space inside the valve. In order to achieve low-pressure pre-tightening of the sealing pair, it is necessary to strike the round nut that fits the external thread of the valve seat. During the striking process, the debris of the round nut will fall into the valve cavity. The debris may scratch the sealing surface and cause leakage. During the striking process, the round nut will undergo irreversible deformation, causing the valve to become stuck. When striking, there is a very obvious jerking sensation between the valve seat and the ball, which can easily cause mutual scratching between the sealing surfaces.

[0037] Please see Figures 1 to 3 The present invention provides the following technical solution: a deep-sea ball valve that enables smooth disassembly and assembly of the valve seat sealing pair, comprising a valve body 1, a valve cover 2, and a valve core 3:

[0038] The valve body 1 is provided with a snap-fit ​​mechanism 4 inside. The snap-fit ​​mechanism 4 includes two valve seats 41 that are symmetrically arranged and slidably connected to the inner wall of the valve body 1. The sealing of the valve core 3 can be adjusted by moving the two valve seats 41.

[0039] like Figure 4 and Figure 7 As shown, each of the two valve seats 41 has a sliding groove 42 on one side corresponding to each other. Each sliding groove 42 is sealed and slidably connected to a cover 43 that is fixedly connected to the inner wall of the valve body 1. The outer wall of each cover 43 can form a hydraulic chamber 44 between itself and the inner wall of the corresponding sliding groove 42. By injecting hydraulic oil into the hydraulic chamber 44, the position of the valve seat 41 can be adjusted.

[0040] Each of the two valve seats 41 has a limiting seat 45 that is slidably connected to the inner wall of the valve body 1 on the opposite side. Each limiting seat 45 has a spring seat 46 that is fixedly connected to the inner wall of the valve body 1 on the side away from the valve seat 41.

[0041] like Figure 4 As shown, each valve seat 41 has a first mounting groove 47 on the side near the limiting seat 45. The inner wall of each first mounting groove 47 is connected to the corresponding limiting seat 45 with a first elastic element 48, and there are at least two first elastic elements 48. Each spring seat 46 has a second mounting groove 49 on the side near the limiting seat 45. Each second mounting groove 49 is connected to the corresponding limiting seat 45 with a second elastic element 410, and there are at least two second elastic elements 410.

[0042] In the initial state, that is, when the valve core 3 is not installed, the first elastic element 48 and the second elastic element 410 are both in a free state, without tension or compression, and there is a space for movement between the spring seat 46, the limit seat 45 and the valve seat 41.

[0043] Each of the two valve seats 41 has a sealing ring 413 inside its corresponding side.

[0044] When the valve seat 41 contacts the valve core 3, the sealing ring 413 can fit with the valve core 3 to seal.

[0045] A hydraulic cylinder 5 is fixedly connected to the outer wall of the valve body 1. A piston plate 51 is movably connected inside the hydraulic cylinder 5. A cylinder cover 52 is fixedly connected to the side of the hydraulic cylinder 5 away from the valve body 1. An adjusting rod 53 is rotatably connected to the inside of the cylinder cover 52. A connecting rod 54, which is fixedly connected to the piston plate 51, is fixedly connected to one end of the adjusting rod 53. A drive wheel 55 is fixedly connected to the end of the adjusting rod 53 away from the connecting rod 54. Rotating the drive wheel 55 can drive the connecting rod 54 and the adjusting rod 53 to rotate synchronously. When the adjusting rod 53 rotates, it can adjust the movement of the piston plate 51 inside the hydraulic cylinder 5.

[0046] The cylinder head 52 has an internal sealing rotatable connection with an adjusting rod 53, wherein the rotatable connection can be a threaded connection.

[0047] When the adjusting rod 53 rotates, it can adjust the movement of the piston plate 51 inside the hydraulic cylinder 5. If the adjusting rod 53 rotates clockwise, the piston plate 51 can move towards the cylinder head 52 inside the hydraulic cylinder 5. If the adjusting rod 53 rotates counterclockwise, the piston plate 51 can move away from the cylinder head 52 inside the hydraulic cylinder 5. Conversely, if the adjusting rod 53 rotates clockwise, the piston plate 51 can move away from the cylinder head 52 inside the hydraulic cylinder 5. If the adjusting rod 53 rotates counterclockwise, the piston plate 51 can move towards the cylinder head 52 inside the hydraulic cylinder 5.

[0048] like Figure 7 and Figure 10 As shown, the outer wall of the hydraulic cylinder 5 is fixedly connected to two guide pipes 515. The other end of the two guide pipes 515 is connected to two hydraulic chambers 44 in a one-to-one correspondence. Each hydraulic chamber 44 is provided with an inlet groove 411 that is connected to the outside. The hydraulic cylinder 5 is provided with a drain groove 516. Each inlet groove 411 and drain groove 516 is provided with a screw plug 412.

[0049] It should be noted that before installing the valve core 3, first open the screw plug 412 inside the inlet groove 411 and connect the external hydraulic system to the inlet groove 411 to connect the hydraulic chamber 44. Then, open the screw plug 412 inside the drain groove 516 and rotate the adjusting rod 53 to move the piston plate 51 inside the hydraulic cylinder 5 to its limit position towards the cylinder head 52. Then, the hydraulic system injects hydraulic oil into the hydraulic chamber 44. The hydraulic oil gradually fills the hydraulic chamber 44 and enters the hydraulic cylinder 5 through the guide pipe 515. When the hydraulic cylinder 5 is full of hydraulic oil, the hydraulic oil can flow out from inside the drain groove 516. When overflow occurs, insert the screw plug 412 into the drain groove 516 to close the drain groove 516. Then, manually or through other driving devices, rotate the adjusting rod 53 to drive the piston plate 51 to move away from the cylinder head 52, causing the liquid pressure in the hydraulic cylinder 5 and hydraulic chamber 44 to increase. The liquid pressure is greater than the preload of the first elastic element 48, which can push the two valve seats 41 to move towards the corresponding spring seats 46. The first elastic element 48 can squeeze, which can push the limit seat 45 to move towards the spring seat 46. The second elastic element 410 compresses, thereby realizing the retraction of the valve seat 41. When the limit is reached... When seat 45 contacts spring seat 46 and valve seat 41 contacts limit seat 45 at its limit position, valve core 3 is inserted. Then, the adjusting rod 53 is rotated again, causing the piston rod in hydraulic cylinder 5 to slowly move towards cylinder head 52, gradually reducing the pressure in hydraulic cylinder 5 and hydraulic chamber 44. The first elastic element 48 and the second elastic element 410 elastically reset, pushing valve seat 41 to contact valve core 3, achieving low-pressure sealing. Finally, the screw plug 412 inside drain groove 516 is opened again, and the connection between hydraulic system and hydraulic chamber 44 is disconnected. The adjusting rod 53 is rotated again, causing the piston rod in hydraulic cylinder 5 to... Slowly moving away from the cylinder head 52 allows the hydraulic oil in the hydraulic cylinder 5 and hydraulic chamber 44 to be discharged from the drain groove 516 and the inlet groove 411. After the hydraulic oil is discharged, the plug 412 needs to be reinserted into the drain groove 516 and the inlet groove 411 for convenient subsequent use. This achieves a smooth assembly of the sealing system. By changing the mechanical transmission to hydraulic transmission, the problem of leakage caused by debris scratching the sealing surface during the knocking process can be avoided. Irreversible deformation of the round nut during the knocking process can be avoided. The axial movement of the valve seat 41 can be prevented from getting stuck. The mutual scratching between the sealing surfaces caused by the rubbing sensation can be avoided.

[0050] In summary, this invention, through the setting of valve seat 41, allows the hydraulic system to inject hydraulic oil into the hydraulic chamber 44 before installing valve core 3. The hydraulic oil gradually fills the hydraulic chamber 44 and enters the hydraulic cylinder 5 through the guide pipe 515. Subsequently, it drives the piston plate 51 to move away from the cylinder head 52, increasing the liquid pressure. This pushes the two valve seats 41 towards the corresponding spring seats 46. When the limit position is reached, the valve core 3 is inserted. Then, the adjusting rod 53 is rotated again, causing the piston rod in the hydraulic cylinder 5 to slowly move towards the cylinder head 52, reducing the liquid pressure. The first elastic element 48 and the second elastic element 410 elastically reset, pushing the valve seat 41 to contact the valve core 3, achieving low-pressure sealing and smooth assembly of the sealing system. By changing mechanical transmission to hydraulic transmission, it avoids the problem of debris scratching the sealing surface and causing leakage during the hammering process, avoids irreversible deformation of the round nut during the hammering process, avoids axial movement jamming of valve seat 41, and avoids mutual abrasion between sealing surfaces caused by the impact.

[0051] Example 2

[0052] Based on the above embodiments, in deep-sea applications, ball valves may need to be opened or closed under enormous pressure. Extremely high pressure will significantly increase the friction between the ball and the valve seat, making it difficult for the valve core to open and close, thus affecting its use.

[0053] Please see Figure 5 , Figure 6 , Figure 8 and Figure 9 The outer wall of the connecting rod 54 is slidably connected to a movable plate 56 that is slidably and sealingly connected to the inner wall of the hydraulic cylinder 5. The piston plate 51 has a receiving cavity 57 inside. The receiving cavity 57 has a flow channel 58 that communicates with the guide pipe 515. The receiving cavity 57 is slidably and sealingly connected to an air extraction plate 59. A connecting ring 510 is fixedly connected between the air extraction plate 59 and the movable plate 56. The outer wall of the connecting ring 510 is slidably and sealingly connected to the piston plate 51, and the inner wall of the connecting ring 510 is slidably connected to the connecting rod 54.

[0054] The movable plate 56 is provided with an adjustment groove 511 on the side near the piston plate 51. The adjustment groove 511 can form a water storage cavity 512 with the inner wall of the hydraulic cylinder 5. A third elastic element 513 is provided between the movable plate 56 away from the piston plate 51 and the cylinder head 52. The third elastic element 513 is sleeved on the outer wall of the connecting rod 54 and the adjusting rod 53.

[0055] In the initial state, when there is no seawater inside the water storage chamber 512, the moving plate 56 and the piston plate 51 are in contact with each other, and the suction plate 59 is located inside the receiving chamber 57 on the side away from the moving plate 56. When the adjusting rod 53 is rotated, causing the piston plate 51 inside the hydraulic cylinder 5 to move towards the cylinder head 52, the piston plate 51 can drive the moving plate 56 to move synchronously, and the third elastic element 513 can be compressed. When the adjusting rod 53 is rotated, causing the piston plate 51 inside the hydraulic cylinder 5 to move away from the cylinder head 52, the third elastic element 513 can elastically reset, ensuring that the moving plate 56 is always in contact with the piston plate 51 and moves synchronously.

[0056] The outer wall of the hydraulic cylinder 5 is provided with two one-way solenoid valves 514, and external liquid can enter the water storage chamber 512 through one of the one-way solenoid valves 514, and the liquid inside the water storage chamber 512 can be discharged to the outside through the other one-way solenoid valve 514. A limit ring 517 is provided inside the side of the hydraulic cylinder 5 away from the cylinder head 52.

[0057] It should be noted that when the ball valve is used in deep sea, under the action of the third elastic element 513, the piston plate 51 can contact the limiting ring 517 and be in the extreme position. Both the drain groove 516 and the inlet groove 411 are filled with screw plugs 412, which are in a sealed state. Before the valve core 3 opens or closes, the one-way solenoid valve 514 that controls the external liquid to enter the water storage chamber 512 opens, and another one-way solenoid valve 514 closes. Affected by the seabed pressure, seawater can enter the water storage chamber 512 through the corresponding one-way solenoid valve 514, causing the moving plate 56 and the piston plate 51 to move away from each other. Because the piston plate 51 is in contact with the limiting ring 517, entering the water storage chamber 512 can push... The movable plate 56 moves away from the piston plate 51, which can drive the suction plate 59 to move synchronously through the connecting ring 510. This can compress the gas inside the receiving cavity 57, allowing the gas to enter the hydraulic cylinder 5 through the guide groove 58, and then enter the two guide pipes 515 respectively. This can increase the pressure inside the two hydraulic chambers 44, which can push the two valve seats 41 to move towards the corresponding spring seats 46 to a certain extent. The first elastic element 48 can compress, which can reduce the degree of compression between the valve seat 41 and the valve core 3, and reduce friction. On the one hand, this facilitates the opening and closing of the valve core 3, and on the other hand, it can reduce the wear of the valve seat 41 and the valve core 3, and improve the service life.

[0058] After the valve core 3 is opened or closed, the one-way solenoid valve 514 that controls the entry of external liquid into the water storage chamber 512 closes, and controls another one-way solenoid valve 514 to open. At this time, seawater cannot enter the water storage chamber 512. The first elastic element 48 elastically resets, and the moving plate 56 moves towards the piston plate 51. The moving plate 56 can squeeze the seawater in the water storage chamber 512 out of the corresponding one-way solenoid valve 514. It can drive the suction plate 59 to move synchronously through the connecting ring 510, and can extract the gas inside the hydraulic cylinder 5 and the hydraulic chamber 44, so that the pressure in the two hydraulic chambers 44 decreases. The first elastic element 48 elastically resets, and can push the valve seat 41 and the sealing ring 413 to contact the valve core 3 again for sealing, so as to facilitate subsequent use.

[0059] In summary, the present invention, through the setting of the movable plate 56, controls the opening and closing of two one-way solenoid valves 514 before the valve core 3 opens or closes, allowing seawater to enter the water storage chamber 512 through the corresponding one-way solenoid valves 514. This pushes the movable plate 56 to move away from the piston plate 51, drives the suction plate 59 to compress the gas inside the receiving chamber 57, increases the pressure of the two hydraulic chambers 44, and pushes the two valve seats 41 to move towards the corresponding spring seats 46 to a certain extent. The first elastic element 48 can compress, reducing the degree of compression between the valve seat 41 and the valve core 3, reducing friction. On the one hand, this facilitates the opening and closing of the valve core 3, and on the other hand, it reduces the wear of the valve seat 41 and the valve core 3, thus improving service life.

[0060] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A deep-sea ball valve for achieving smooth disassembly and assembly of the valve seat sealing pair, comprising a valve body (1), a valve cover (2), and a valve core (3), characterized in that: The valve body (1) is provided with a snap-fit ​​mechanism (4) inside. The snap-fit ​​mechanism (4) includes two valve seats (41) symmetrically arranged and slidably connected to the inner wall of the valve body (1). The valve core (3) can be adjusted for sealing by moving the two valve seats (41). Each of the two valve seats (41) has a sliding groove (42) on one side corresponding to each other. Each sliding groove (42) is sealed and slidably connected to a cover (43) that is fixedly connected to the inner wall of the valve body (1). The outer wall of each cover (43) can form a hydraulic chamber (44) with the inner wall of the corresponding sliding groove (42). By injecting hydraulic oil into the hydraulic chamber (44), the position of the valve seat (41) can be adjusted. A hydraulic cylinder (5) is fixedly connected to the outer wall of the valve body (1). A piston plate (51) is movably connected inside the hydraulic cylinder (5). A cylinder cover (52) is fixedly connected to the side of the hydraulic cylinder (5) away from the valve body (1). An adjusting rod (53) is rotatably connected to the inside of the cylinder cover (52). A connecting rod (54) is fixedly connected to one end of the adjusting rod (53) and fixedly connected to the piston plate (51). A drive wheel (55) is fixedly connected to the end of the adjusting rod (53) away from the connecting rod (54). Rotating the drive wheel (55) can drive the connecting rod (54) and the adjusting rod (53) to rotate synchronously. When the adjusting rod (53) rotates, it can adjust the piston plate (51) to move inside the hydraulic cylinder (5). The outer wall of the connecting rod (54) is slidably connected to a movable plate (56) which is sealed and slidably connected to the inner wall of the hydraulic cylinder (5). The piston plate (51) has a receiving cavity (57) inside. The receiving cavity (57) has a flow channel (58) connected to the flow guide pipe (515) inside. The receiving cavity (57) is sealed and slidably connected to an air extraction plate (59). A connecting ring (510) is fixedly connected between the air extraction plate (59) and the movable plate (56). The outer wall of the connecting ring (510) is sealed and slidably connected to the piston plate (51), and the inner wall of the connecting ring (510) is slidably connected to the connecting rod (54). The movable plate (56) is provided with an adjustment groove (511) on the side near the piston plate (51). The adjustment groove (511) can form a water storage cavity (512) with the inner wall of the hydraulic cylinder (5). A third elastic element (513) is provided between the movable plate (56) away from the piston plate (51) and the cylinder head (52). The third elastic element (513) is sleeved on the outer wall of the connecting rod (54) and the adjustment rod (53). The outer wall of the hydraulic cylinder (5) is fixedly connected to two guide pipes (515), and the other end of the two guide pipes (515) is connected to the two hydraulic chambers (44) in a one-to-one correspondence.

2. The deep-sea ball valve for achieving smooth disassembly and assembly of the valve seat sealing pair according to claim 1, characterized in that: Each of the two valve seats (41) is provided with a limiting seat (45) that is slidably connected to the inner wall of the valve body (1) on the opposite side. Each limiting seat (45) is provided with a spring seat (46) that is fixedly connected to the inner wall of the valve body (1) on the side away from the valve seat (41).

3. The deep-sea ball valve for achieving smooth disassembly and assembly of the valve seat sealing pair according to claim 2, characterized in that: Each valve seat (41) has a first mounting groove (47) on the side near the limiting seat (45). The inner wall of each first mounting groove (47) is connected to the corresponding limiting seat (45) with a first elastic element (48). There are at least two first elastic elements (48). Each spring seat (46) has a second mounting groove (49) on the side near the limiting seat (45). Each second mounting groove (49) is connected to the corresponding limiting seat (45) with a second elastic element (410). There are at least two second elastic elements (410).

4. The deep-sea ball valve for achieving smooth disassembly and assembly of the valve seat sealing pair according to claim 3, characterized in that: The outer wall of the hydraulic cylinder (5) is provided with two one-way solenoid valves (514), and external liquid can enter the water storage chamber (512) through one of the one-way solenoid valves (514), and the liquid inside the water storage chamber (512) can be discharged to the outside through the other one-way solenoid valve (514). A limiting ring (517) is provided inside the side of the hydraulic cylinder (5) away from the cylinder head (52).

5. The deep-sea ball valve for achieving smooth disassembly and assembly of the valve seat sealing pair according to claim 4, characterized in that: Each of the hydraulic chambers (44) is provided with an inlet groove (411) that is connected to the outside. The hydraulic cylinder (5) is provided with a drain groove (516). Each inlet groove (411) and drain groove (516) is provided with a screw plug (412).

6. The deep-sea ball valve for achieving smooth disassembly and assembly of the valve seat sealing pair according to claim 5, characterized in that: Each of the two valve seats (41) has a sealing ring (413) inside its corresponding side.

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