High-pressure sealing gate valve for deep sea environment
Through automatic pressure compensation and rotational position adjustment device, the problem of degradation of sealing performance of traditional high-pressure gate valves in deep-sea environments is solved, automatic adjustment and uniform friction of the side valve plate are achieved, and sealing and wear resistance are improved.
Patent Information
- Application Number
- CN202510993954.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-18
- Publication Date
- 2025-09-02
AI Technical Summary
In deep-sea environment, the sealing performance of traditional high-pressure gate valves is degraded due to wear of valve plates and valve seats. In the dual-valve plate structure, the spring affects elastic force and local wear are severe, making it difficult to maintain an effective seal.
The automatic pressure compensation device and a rotation position adjustment device are adopted to adjust the distance between the compensation base and the pressure valve by controlling the motor drive internal tooth drive sleeve, and combined with the rotation and telescopic movement of the side valve plate, the automatic adjustment of the spring force and uniform friction of the pressure spring are achieved to avoid local wear.
It improves the service life and sealing of the side valve plate, avoids the impact of wear and affects the internal sealing effect of the valve seat, and meets the working needs in deep-sea high-pressure environments.
Smart Images
Figure CN120576249A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of valves, and in particular to a high-pressure sealing gate valve for use in deep-sea environments. Background Art
[0002] A valve is a device used to control the direction, pressure, and flow of fluids in a fluid system. It enables or stops the flow of fluids within piping and equipment, and can control their flow. Valves can be categorized into many types based on their structure and function. These include gate valves, ball valves, butterfly valves, plunger valves, diaphragm valves, and plug valves. Based on their function, they can be divided into check valves, safety valves, pressure reducing valves, and steam traps. A gate valve is an open-and-close disc with a movement perpendicular to the flow direction. It can only be fully opened or closed. It offers low flow resistance, is less susceptible to water hammer, and features a simple, bilaterally symmetrical structure, making it suitable for a wide range of applications.
[0003] During the use of traditional high-pressure gate valves, the valve seat or valve plate is easily worn due to the reciprocating up and down movement of the valve plate, which reduces the sealing performance of the gate valve and eventually makes the gate valve unusable. For high-pressure sealing valves in deep-sea environments, it is not convenient to replace the valve plate or valve seat due to environmental limitations. Therefore, in order to reduce the wear of the valve plate and valve seat, most of them adopt a double-valve disc retractable sealing method. The power of the retraction is generally derived from the control of the spring and the valve shaft height, which leads to the following problems: 1. The spring will affect the elastic force during the reciprocating motion of the valve plate, thereby affecting the elastic pressure of the valve plate, resulting in reduced sealing of the gate valve; 2. The traditional double valve plate adopts a cylindrical body. During the up and down movement of its surface, the area in contact with the inner wall of the valve seat is a designated area. This will cause this area to rub against the inner wall of the valve seat for a long time, resulting in excessive wear in this area. In view of this, we propose a high-pressure sealing gate valve for deep-sea environment. Summary of the Invention
[0004] In response to the shortcomings of the prior art, the present invention provides a high-pressure sealing gate valve for deep-sea environments, which solves the problems raised in the above-mentioned background technology. To achieve the above purpose, the present invention is implemented through the following technical solutions: A high-pressure sealing gate valve for deep-sea environments, comprising a valve seat, a valve shaft is provided inside the valve seat, an automatic pressure compensation device is provided on the valve shaft, a pressure block and a pressure valve are provided on the automatic pressure compensation device, a rotation adjustment device is provided inside the pressure valve, side valve plates are connected to both sides of the rotation adjustment device, and passive pressure blocks are slidably connected to both sides of the pressure valve; the automatic pressure compensation device comprises a coupling rod, one end of the coupling rod is fixedly mounted on the end of the valve shaft, a control motor is installed inside the coupling rod, the output shaft of the control motor is clamped with an internal gear drive sleeve, the internal part of the internal gear drive sleeve is meshed with a gear screw seat, the internal part of the gear screw seat is threadedly connected to an adjusting screw, the end of the adjusting screw is rotatably connected to a compensation base, and a pressure spring is fixedly connected between the surface of the compensation base and the surface of the pressure valve.
[0005] Preferably, the surface of the passive pressure block abuts against the surface of the pressure block and the side valve plate respectively, and the side valve plate is composed of an inner circular valve and an outer circular valve. The diameter of the inner circular valve is larger than the diameter of the outer circular valve, and a circular groove is provided on the side of the inner circular valve close to the pressure valve.
[0006] Preferably, both sides of the pressure valve are fixedly connected with a telescopic ring plate, and the telescopic ring plate is composed of a fixed plate and a movable plate, and one side of the movable plate slides in the fixed plate, and the other side of the movable plate slides in the circular groove.
[0007] Preferably, the end of the tooth screw seat is rotatably connected to the inside of the coupling rod, both sides of the compensation base are slidably connected to the inner wall of the valve seat, and the bottom of the compensation base is fixedly connected to the top of the pressure block.
[0008] Preferably, a circulation cavity is provided inside the compensation base, a pressure sensor is installed inside the circulation cavity, a sealing sleeve rod is fixedly connected to the compensation base, and the internal piston of the sealing sleeve rod is connected to a plug rod.
[0009] Preferably, the interior of the sealing sleeve rod is in communication with the interior of the circulation cavity, and one end of the plug rod away from the sealing sleeve rod is fixedly connected to the pressure valve.
[0010] Preferably, the rotation adjustment device includes a central shaft, the surface of the central shaft is rotatably connected to the inside of the pressure valve, a worm gear is fixedly connected to the central shaft, a linkage device is provided on the worm gear, the inside of the central shaft is slidably connected to a key shaft through a key groove, the end of the key shaft away from the pressure valve is fixed on the side valve plate, and the central shaft is elastically connected to the inner circular valve through a spring.
[0011] Preferably, the linkage device includes a worm and a one-way drive seat fixedly connected to the pressure block, one end of the worm is rotatably connected to the pressure valve, and the other end of the worm passes through the pressure valve and is fixedly connected to a gear.
[0012] Preferably, the one-way drive seat includes a connecting seat, the top of the connecting seat is fixedly connected to the pressure block, and a limiting groove is opened at the bottom of the connecting seat. The inside of the limiting groove is elastically connected to the driving teeth through a torsion spring, and the driving teeth are fixedly connected to the limiting protrusion.
[0013] Preferably, the surface of the worm is meshed with the surface of the worm wheel, and the surface of the driving teeth is in contact with the surface of the gear.
[0014] As can be seen from the above technical solutions, the high-pressure sealing gate valve for deep-sea environments provided in the embodiments of this specification has at least the following beneficial effects: (1) The present invention controls the motor to drive the inner gear drive sleeve to engage the gear screw seat, thereby achieving the effect of adjusting the distance between the compensation base and the pressure valve, thereby utilizing the adjustment of the distance to compensate for the change in the elastic force of the pressure spring, thereby achieving the effect of automatic adjustment, thereby avoiding the influence of the pressure spring elastic force change caused by long-term use on the sealing effect of the pressure valve on the valve seat. In combination with the rotation adjustment device, the power of the downward movement of the pressure block is utilized to drive the side valve plate to rotate in one direction, and the effect of the side valve plate rotating and changing the point is achieved by each lifting and lowering of the valve shaft, thereby promoting the comprehensive and uniform friction between the surface of the side valve plate and the inner wall of the valve seat, thereby improving the service life of the entire side valve plate.
[0015] (2) The present invention drives the compensating base on the adjusting screw connected to the inner tooth screw seat of the coupling rod downward through the valve shaft, and the compensating base drives the pressure valve to move downward as a whole through the pressure spring. The pressure valve drives the two sets of side valve plates to align with the valve port through the rotating adjustment device, and uses the force of the coupling rod to continue to press down to drive the compensating base to compress the pressure spring. The compensating base gradually abuts against the passive pressure block through the pressure block, thereby driving the two sets of passive pressure blocks to squeeze the two sets of side valve plates to the valve port in the valve seat to achieve a double-layer sealing effect. The two sets of side valve plates that can be extended and retracted not only achieve the purpose of good sealing effect, but also avoid wear between their outer side surfaces and the inner wall of the valve seat after contraction, thereby improving the overall wear resistance of the side valve plates, thereby avoiding the influence of wear on the sealing effect inside the valve seat.
[0016] (3) The present invention monitors the elastic state of the pressure spring through the pressure sensor at all times. When the elastic force of the pressure spring weakens, the distance between the pressure valve and the compensation base increases. During the period when the valve shaft moves down a specified distance, the sliding state of the plug rod in the sealing sleeve rod changes. When the plug rod moves as a piston, it acts on the flow chamber. The hydraulic oil in the flow chamber is compressed according to the squeezing of the plug rod piston. The force during the compression acts on the pressure sensor, which converts it into an electrical signal, and then determines the elastic force of the pressure spring, thereby achieving the effect of automatically monitoring the elastic force of the pressure spring.
[0017] (4) The present invention drives the worm gear to rotate the central shaft through the pressure block through the linkage device, and the central shaft drives the side valve plate to rotate in a small range through the keyway and the key shaft. After the side valve plate rotates, the tangent point between its surface and the inner wall of the valve seat can be replaced, thereby avoiding the problem of long-term friction and wear between the fixed point area on the side valve plate and the inner wall of the valve seat. The effect of the side valve plate rotating and changing the point is achieved by each lifting and lowering of the valve shaft, thereby promoting the side valve plate surface to rub against the inner wall of the valve seat comprehensively and evenly, thereby improving the service life of the entire side valve plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the valve seat in the present invention; Figure 3 Schematic diagram of the internal structure of the coupling rod in the present invention; Figure 4 This is a schematic diagram of the side valve plate structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the compensation base in the present invention; Figure 6 This is a structural diagram of the pressure block in the present invention; Figure 7 This is a schematic diagram of the internal structure of the medium-pressure valve of the present invention; Figure 8 Schematic diagram of the structure of the worm in the present invention; Figure 9 Schematic diagram of the one-way drive seat structure in the present invention; Figure 10 It is a schematic diagram of the structure of the driving teeth in the present invention.
[0019] In the figure: 1. valve seat; 2. valve shaft; 3. automatic pressure compensation device; 31. coupling rod; 32. control motor; 33. internal gear drive sleeve; 34. gear screw seat; 35. adjusting screw; 36. compensation base; 361. flow chamber; 362. pressure sensor; 363. sealing sleeve rod; 364. plug rod; 37. pressure spring; 4. pressure block; 5. pressure valve; 6. rotation adjustment device; 61. center shaft; 62. worm gear; 63. linkage device; 64. key shaft; 631. worm; 632. gear; 633. one-way drive seat; 6331. connecting seat; 6332. limiting groove; 6333. driving teeth; 6334. limiting protrusion; 7. side valve plate; 71. inner circular valve; 72. outer circular valve; 73. circular groove; 8. passive pressure block; 9. telescopic ring plate. DETAILED DESCRIPTION
[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.
[0021] Example See also Figure 1 - Figure 10As shown, a high-pressure sealing gate valve for deep-sea environment includes a valve seat 1, a valve shaft 2 is provided inside the valve seat 1, an automatic pressure compensation device 3 is provided on the valve shaft 2, a pressure block 4 and a pressure valve 5 are provided on the automatic pressure compensation device 3, a rotation adjustment device 6 is provided inside the pressure valve 5, side valve plates 7 are connected to both sides of the rotation adjustment device 6, and passive pressure blocks 8 are slidably connected to both sides of the pressure valve 5; the automatic pressure compensation device 3 includes a coupling rod 31, one end of the coupling rod 31 is fixedly mounted on the end of the valve shaft 2, a control motor 32 is installed inside the coupling rod 31, the output shaft of the control motor 32 is clamped with an internal gear drive sleeve 33, and the internal gear drive sleeve 33 is meshed with a tooth screw seat 3 4, the internal thread of the tooth screw seat 34 is connected with an adjusting screw 35, the end of the tooth screw seat 34 is rotatably connected to the inside of the coupling rod 31, and the end of the adjusting screw 35 is rotatably connected to the compensation base 36. A pressure spring 37 is fixedly connected between the surface of the compensation base 36 and the surface of the pressure valve 5. Both sides of the compensation base 36 are slidably connected to the inner wall of the valve seat 1, and the bottom of the compensation base 36 is fixedly connected to the top of the pressure block 4. When the valve port in the valve seat 1 is in the open state, the valve shaft 2 controls the coupling rod 31 to be located in the top area of the valve seat 1 as a whole. When the valve needs to be closed, the valve shaft 2 is driven by the power structure to drive the coupling rod 31 to move downward as a whole, and the coupling rod 31 is driven by the internally positioned tooth screw seat 34. The compensation base 36 connected to the dynamic adjusting screw 35 moves downward as a whole, and the compensation base 36 drives the pressure valve 5 to move downward as a whole through the pressure spring 37. When the bottom of the pressure valve 5 contacts the inner wall of the valve seat 1, the pressure valve 5 drives the two sets of side valve plates 7 to align with the valve port by rotating the adjustment device 6. When the coupling rod 31 continues to be pressed downward, the downward force acts on the pressure spring 37 through the compensation base 36. The pressure spring 37 is compressed, and the distance between the compensation base 36 and the pressure valve 5 gradually decreases. During the downward movement, the compensation base 36 gradually abuts against the passive pressure block 8 through the pressure block 4. The passive pressure block 8 can only move linearly inside the pressure valve 5. When the pressure block 4 squeezes the two sets of symmetrical passive pressure blocks 8, the two sets of passive pressure blocks 8 works relatively far away, and during the period of moving away, squeezes the two groups of side valve plates 7 to plug into the valve port in the valve seat 1 to achieve a double-layer sealing effect. The two groups of side valve plates 7 that can be retracted not only achieve the purpose of good sealing effect, but also avoid wear between their outer side surfaces and the inner wall of the valve seat 1 after contraction, thereby improving the overall wear resistance of the side valve plates 7, thereby avoiding the impact of wear on the internal sealing effect of the valve seat 1. At the same time, the rotation adjustment device 6 uses the power of the downward movement of the pressure block 4 to drive the side valve plate 7 to rotate in one direction, and realizes the effect of changing the rotation point of the side valve plate 7 by each lifting and lowering of the valve shaft 2, thereby promoting the comprehensive and uniform friction between the surface of the side valve plate 7 and the inner wall of the valve seat 1, thereby improving the service life of the overall side valve plate 7.By controlling the motor 32 to drive the internal gear drive sleeve 33 to engage the gear screw seat 34, the effect of adjusting the distance between the compensation base 36 and the pressure valve 5 is achieved, thereby utilizing the adjustment of the distance to compensate for the change in the elastic force of the pressure spring 37 to achieve an automatic adjustment effect, thereby avoiding the change in the elastic force of the pressure spring 37 due to long-term use affecting the sealing effect of the pressure valve 5 on the valve seat 1.
[0022] In this embodiment, the surfaces of the passive pressure block 8 are respectively in contact with the surfaces of the pressure block 4 and the side valve plate 7. Inclined surfaces are provided on both sides of the passive pressure block 8. The top of the pressure block 4 is provided with an inclined surface corresponding to the passive pressure block 8 for achieving abutment. During the abutment, the height of the pressure block 4 can be used to drive the passive pressure block 8 to move horizontally. The two groups of side valve plates 7 are in a contracted state under normal conditions. After the pressure block 4 squeezes the two groups of symmetrical passive pressure blocks 8, the two groups of passive pressure blocks 8 work relatively away from each other, and during the period of moving away, they squeeze the two groups of side valve plates 7 to be plugged into the valve port in the valve seat 1 to achieve a double-layer sealing effect. In the contracted state, the side of the side valve plate 7 close to the inner wall of the valve seat 1 can not contact the valve seat 1. The frictional contact with the inner wall improves the wear resistance of the side valve plate 7 as a whole, thereby preventing the wear from affecting the internal sealing effect of the valve seat 1. The side valve plate 7 is composed of an inner valve 71 and an outer valve 72. The diameter of the inner valve 71 is larger than that of the outer valve 72. By arranging the inner valve 71 and the outer valve 72, the side valve plate 7 is in a protruding state and plugs into the valve port of the valve seat 1 to seal, thereby achieving a double-layer sealing effect, improving the sealing effect when plugging into the valve seat 1. At the same time, the design of the double-sided valve plate 7 can improve the high pressure resistance and sealing performance of the entire valve plate, meeting the working strength of the valve seat 1 in the deep sea high pressure environment. The inner valve 71 is provided with a circular groove 73 on the side close to the pressure valve 5. Both sides of the pressure valve 5 are fixedly connected to a telescopic ring plate 9. The telescopic ring plate 9 is composed of a fixed plate and a movable plate. One side of the movable plate slides in the fixed plate, and the other side of the movable plate slides in the circular groove 73. The telescopic ring plate 9 is used to seal and protect the structure on the pressure valve 5.
[0023] Furthermore, a flow cavity 361 is provided inside the compensation base 36 (eg Figure 6As shown), a pressure sensor 362 is installed inside the circulation chamber 361, a sealing sleeve rod 363 is fixedly connected to the compensation base 36, and the internal piston of the sealing sleeve rod 363 is connected to the plug rod 364. The interior of the sealing sleeve rod 363 is in communication with the interior of the circulation chamber 361, and the end of the plug rod 364 away from the sealing sleeve rod 363 is fixedly connected to the pressure valve 5. The pressure sensor 362 always monitors the elastic state of the pressure spring 37. When the elastic force of the pressure spring 37 weakens, the distance between the pressure valve 5 and the compensation base 36 will increase. During the period when the valve shaft 2 moves down a specified distance, the sliding state of the plug rod 364 in the sealing sleeve rod 363 changes. When the plug rod 364 produces piston movement, it will act on the circulation chamber 361. The interior of the circulation chamber 361 is filled with hydraulic oil. The hydraulic oil in the circulation chamber 361 is compressed according to the squeezing of the piston of the plug rod 364. The force during compression acts on the pressure sensor 362, and the pressure sensor 362 converts it into an electrical signal, which then determines the elastic force of the pressure spring 37, drives the control motor 32 to work, and controls the output shaft of the motor 32 to rotate by engaging the tooth screw seat 34 through the internal gear drive sleeve 33. The tooth screw seat 34 drives the adjusting screw 35 to move in the tooth screw seat 34 through the thread principle. The adjusting screw 35 adjusts the distance between the compensation base 36 and the pressure valve 5, thereby using the adjustment of the distance to compensate for the change in the elastic force of the pressure spring 37, thereby achieving an automatic adjustment effect, thereby avoiding the change in the elastic force of the pressure spring 37 due to long-term use that affects the sealing effect of the pressure valve 5 on the valve seat 1.
[0024] Furthermore, the rotation adjustment device 6 includes a central shaft 61, the surface of the central shaft 61 is rotatably connected to the inside of the pressure valve 5, a worm gear 62 is fixedly connected to the central shaft 61, and a linkage device 63 is provided on the worm gear 62. The interiors of both ends of the central shaft 61 are slidably connected to key shafts 64 through key grooves. The ends of the two sets of key shafts 64 away from the pressure valve 5 are fixed on the side valve plate 7. The central shaft 61 is elastically connected to the two sets of inner valves 71 respectively through two sets of springs. During the downward movement, the pressure block 4 drives the worm gear through the linkage device 63. 62 drives the central shaft 61 to rotate, and the central shaft 61 drives the side valve plate 7 to rotate in a small range through the keyway and the key shaft 64. After the rotation, the side valve plate 7 can achieve the effect of replacing the tangent point between its surface and the inner wall of the valve seat 1, thereby avoiding the problem of long-term friction and wear between the fixed point area on the side valve plate 7 and the inner wall of the valve seat 1. The effect of rotating and changing the point of the side valve plate 7 is achieved by each lifting and lowering of the valve shaft 2, thereby promoting the comprehensive and uniform friction between the surface of the side valve plate 7 and the inner wall of the valve seat 1, thereby improving the service life of the overall side valve plate 7.
[0025] In addition, the linkage device 63 includes a worm 631 and a one-way drive seat 633 fixedly connected to the pressure block 4. One end of the worm 631 is rotatably connected to the pressure valve 5, and the other end of the worm 631 passes through the pressure valve 5 and is fixedly connected to a gear 632. By setting the one-way drive seat 633, the side valve plate 7 can achieve a one-way rotation point change effect according to each rise and fall of the valve shaft 2, thereby promoting the surface of the side valve plate 7 to fully and evenly rub against the inner wall of the valve seat 1, thereby improving the service life of the overall side valve plate 7.
[0026] In addition, the one-way drive seat 633 includes a connecting seat 6331, the top of the connecting seat 6331 is fixedly connected to the pressure block 4, and the bottom of the connecting seat 6331 is provided with a limiting groove 6332. The interior of the limiting groove 6332 is elastically connected to the driving tooth 6333 through a torsion spring, and the driving tooth 6333 is fixedly connected to the limiting protrusion 6334. The surface of the worm 631 meshes with the surface of the worm wheel 62, and the surface of the driving tooth 6333 contacts the surface of the gear 632. The elastic force of the torsion spring on the driving tooth 6333 is less than the power for the driving gear 632 to rotate. The driving tooth 6333 is restricted by the limiting protrusion 6334 in the limiting groove 6332 and can only rotate in one direction and reset after the one-way rotation. That is, the driving tooth 6333 can only engage the gear 632 for rotation when it moves downward with the connecting seat 6331. When the driving tooth 6333 moves upward with the connecting seat 6331, it cannot drive the meshing gear 632 to rotate. At this time, the driving tooth 6333 automatically gives way and rotates in the limiting groove 6332, and is reset by the elastic force of the torsion spring after giving way, so as to facilitate the reuse of the driving tooth 6333.
[0027] When a high-pressure sealing gate valve for deep-sea environment of the present invention is in use, when the valve port in the valve seat 1 is in an open state, the valve shaft 2 controls the coupling rod 31 to be located in the top area of the valve seat 1 as a whole. When the valve needs to be closed, the valve shaft 2 is driven by the power structure to drive the coupling rod 31 to move downward as a whole. The coupling rod 31 drives the compensation base 36 connected to the adjusting screw 35 to move downward as a whole through the internally positioned tooth screw seat 34. The compensation base 36 drives the pressure valve 5 to move downward as a whole through the pressure spring 37. When the bottom of the pressure valve 5 contacts the inner wall of the valve seat 1, the central shaft 61 on the pressure valve 5 drives the side valve plate 7 on the key shaft 64 through the key groove to align with the valve port in the valve seat 1, and aligns with the first two groups of side valves. The plate 7 is in a contracted state. When the coupling rod 31 continues to be pressed downward, the pressure valve 5 always abuts against the bottom wall of the valve seat 1. At this time, the downward pressure acts on the pressure spring 37 through the compensation base 36. The pressure spring 37 is compressed, and the plug rod 364 slides in the sealing sleeve rod 363. The distance between the compensation base 36 and the pressure valve 5 gradually decreases. During the downward movement, the compensation base 36 gradually abuts against the passive pressure block 8 through the pressure block 4. The passive pressure block 8 can only move linearly inside the pressure valve 5. After the pressure block 4 squeezes the two groups of symmetrical passive pressure blocks 8, the two groups of passive pressure blocks 8 work relatively away from each other, and during the period of moving away, squeeze the two groups of side valve plates 7 to insert into the valve port in the valve seat 1. The double-layer sealing effect is achieved. At the same time, the pressure block 4 during the downward movement drives the driving teeth 6333 in the limit groove 6332 to mesh with the gear 632 to rotate through the connecting seat 6331. The gear 632 meshes with the worm wheel 62 through the worm 631 to drive the central shaft 61 to rotate. The central shaft 61 drives the side valve plate 7 to rotate in a small range through the keyway and the key shaft 64. After the rotation, the side valve plate 7 can achieve the effect of replacing the tangent point between its surface and the inner wall of the valve seat 1, thereby avoiding the problem of long-term friction and wear between the fixed point area on the side valve plate 7 and the inner wall of the valve seat 1. The effect of rotating and changing the point of the side valve plate 7 is achieved by each lifting and lowering of the valve shaft 2, thereby promoting the comprehensive sealing of the surface of the side valve plate 7 And it rubs evenly with the inner wall of the valve seat 1, thereby improving the service life of the overall side valve plate 7. The driving tooth 6333 is restricted by the limiting protrusion 6334 in the limiting groove 6332 and can only perform one-way rotation and reset rotation after one-way rotation. That is, the driving tooth 6333 can only engage the gear 632 to rotate when it moves downward with the connecting seat 6331. When the driving tooth 6333 moves upward with the connecting seat 6331, it cannot drive the meshing gear 632 to rotate. At this time, the driving tooth 6333 automatically gives way and rotates in the limiting groove 6332, and is reset by the elastic force of the torsion spring after giving way, so as to facilitate the reuse of the driving tooth 6333.At the same time, when the valve shaft 2 moves upward, the pressure valve 5 is restricted by the pressure spring 37 and first always abuts against the bottom wall of the valve seat 1. At this time, the upward compensation base 36 drives the pressure block 4 to move upward, and the tops of the two groups of passive pressure blocks 8 gradually lose the abutment effect of the pressure block 4. At the same time, the two groups of side valve plates 7 are restricted by the elastic force of the springs thereon and always elastically approach the pressure valve 5. The squeezing force of the spring acts on the pressure block 4, and the pressure block 4 gradually shrinks and moves inward. The two groups of side valve plates 7 also gradually approach and shrink. After shrinkage, the valve shaft 2 that continues to move upward drives the pressure valve 5 as a whole to move upward through the linkage effect. During the upward movement, the wear of the outer surface of the outer circular valve 72 and the inner wall of the valve seat 1 can be avoided, thereby improving the overall wear resistance of the side valve plate 7, thereby avoiding affecting the internal sealing effect of the valve seat 1 due to wear.
[0028] The pressure sensor 362 always monitors the elastic state of the pressure spring 37. When the elastic force of the pressure spring 37 weakens, the distance between the pressure valve 5 and the compensation base 36 increases. During the period when the valve shaft 2 moves down by a specified distance, the sliding state of the plug rod 364 in the sealing sleeve rod 363 changes. When the plug rod 364 moves as a piston, it acts on the circulation chamber 361. The hydraulic oil in the circulation chamber 361 is compressed according to the piston squeezing of the plug rod 364. The force during the compression acts on the pressure sensor 362, and the pressure sensor 362 converts it into The electric signal is then used to judge the elastic force of the pressure spring 37, and the control motor 32 is driven to work. The output shaft of the control motor 32 engages the tooth screw seat 34 through the internal gear drive sleeve 33 to rotate. The tooth screw seat 34 drives the adjusting screw 35 to move in the tooth screw seat 34 through the thread principle. The adjusting screw 35 adjusts the distance between the compensation base 36 and the pressure valve 5, thereby using the adjustment of the distance to compensate for the change in the elastic force of the pressure spring 37, and realizes the effect of automatic adjustment, thereby avoiding the change in the elastic force of the pressure spring 37 due to long-term use. The impact of the sealing effect of the pressure valve 5 on the valve seat 1.
[0029] The above implementation methods are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the scope of patent protection of the embodiments of the present invention should be defined by the claims.
Claims
1. A high-pressure sealing gate valve for deep-sea environments, comprising a valve seat (1), wherein a valve shaft (2) is provided inside the valve seat (1), and characterized in that: The valve shaft (2) is provided with an automatic pressure compensation device (3), and the automatic pressure compensation device (3) is provided with a pressure block (4) and a pressure valve (5), respectively. A rotation adjustment device (6) is provided inside the pressure valve (5), and both sides of the rotation adjustment device (6) are connected to side valve plates (7), and both sides of the pressure valve (5) are slidably connected to passive pressure blocks (8); The automatic pressure compensation device (3) includes a coupling rod (31), one end of the coupling rod (31) is fixedly mounted on the end of the valve shaft (2), a control motor (32) is mounted inside the coupling rod (31), an output shaft of the control motor (32) is clamped with an internal gear drive sleeve (33), the internal of the internal gear drive sleeve (33) is meshed with a tooth screw seat (34), the internal thread of the tooth screw seat (34) is connected to an adjusting screw (35), the end of the adjusting screw (35) is rotatably connected to a compensation base (36), and a pressure spring (37) is fixedly connected between the surface of the compensation base (36) and the surface of the pressure valve (5).
2. A high-pressure sealing gate valve for deep-sea environment according to claim 1, characterized in that: The surfaces of the passive pressure block (8) are in contact with the surfaces of the pressure block (4) and the side valve plate (7), respectively. The side valve plate (7) is composed of an inner circular valve (71) and an outer circular valve (72). The diameter of the inner circular valve (71) is larger than that of the outer circular valve (72), and a circular groove (73) is provided on the side of the inner circular valve (71) close to the pressure valve (5).
3. A high-pressure sealing gate valve for deep-sea environment according to claim 2, characterized in that: Both sides of the pressure valve (5) are fixedly connected with a telescopic ring plate (9), and the telescopic ring plate (9) is composed of a fixed plate and a movable plate, and one side of the movable plate slides in the fixed plate, and the other side of the movable plate slides in the circular groove (73).
4. A high-pressure sealing gate valve for deep-sea environment according to claim 1, characterized in that: The end of the tooth screw seat (34) is rotatably connected to the inside of the coupling rod (31), both sides of the compensation base (36) are slidably connected to the inner wall of the valve seat (1), and the bottom of the compensation base (36) is fixedly connected to the top of the pressure block (4).
5. The high-pressure sealing gate valve for deep-sea environment according to claim 1, characterized in that: A circulation cavity (361) is provided inside the compensation base (36), a pressure sensor (362) is installed inside the circulation cavity (361), a sealing sleeve rod (363) is fixedly connected to the compensation base (36), and a plug rod (364) is connected to the internal piston of the sealing sleeve rod (363).
6. A high-pressure sealing gate valve for deep-sea environment according to claim 5, characterized in that: The interior of the sealing sleeve rod (363) is in communication with the interior of the circulation cavity (361), and one end of the plug rod (364) away from the sealing sleeve rod (363) is fixedly connected to the pressure valve (5).
7. The high-pressure sealing gate valve for deep-sea environment according to claim 2, characterized in that: The rotation adjustment device (6) includes a central shaft (61), the surface of the central shaft (61) is rotatably connected to the inside of the pressure valve (5), a worm gear (62) is fixedly connected to the central shaft (61), and a linkage device (63) is provided on the worm gear (62). The inside of the central shaft (61) is slidably connected to a key shaft (64) through a key groove, and the end of the key shaft (64) away from the pressure valve (5) is fixed to the side valve plate (7), and the central shaft (61) is elastically connected to the inner valve (71) through a spring.
8. A high-pressure sealing gate valve for deep-sea environment according to claim 7, characterized in that: The linkage device (63) includes a worm (631) and a one-way drive seat (633) fixedly connected to the pressure block (4); one end of the worm (631) is rotatably connected to the pressure valve (5); the other end of the worm (631) passes through the pressure valve (5) and is fixedly connected to a gear (632).
9. A high-pressure sealing gate valve for deep-sea environment according to claim 8, characterized in that: The one-way drive seat (633) includes a connecting seat (6331), the top of the connecting seat (6331) is fixedly connected to the pressure block (4), and the bottom of the connecting seat (6331) is provided with a limiting groove (6332). The interior of the limiting groove (6332) is elastically connected to a driving tooth (6333) via a torsion spring, and the driving tooth (6333) is fixedly connected to a limiting protrusion (6334).
10. A high-pressure sealing gate valve for deep-sea environment according to claim 9, characterized in that: The surface of the worm (631) meshes with the surface of the worm wheel (62), and the surface of the driving teeth (6333) contacts the surface of the gear (632).