Valve element assembly and gate valve

Abstract

The invention relates to the technical field of gate valves and provides a valve element assembly and a gate valve, the valve element assembly comprises a valve seat, a valve plate and a pressurizing device, and the valve seat is arranged in an inner cavity of a valve body; the valve plate is movably arranged in the inner cavity of the valve body in the height direction of the valve plate; at least one side face of the valve plate is attached to the valve seat. The pressurizing device is arranged on the valve seat; the pressurizing device can move in the direction perpendicular to the height direction of the valve plate. The pressurizing device is used for gradually increasing the pressure acting on the valve plate in the process of closing the gate valve, and then the contact pressure between the valve plate and the valve seat is increased. According to the valve element assembly, the pressurizing device is arranged on the valve seat, so that when the valve plate moves in the height direction of the valve plate so as to close the gate valve, the contact pressure between the sealing face of the valve plate and the sealing face of the valve seat is gradually increased through the pressurizing device, self-tightening sealing is achieved, and the sealing effect is effectively enhanced when the gate valve is closed.

Description

Technical Field

[0001] The present application relates to the technical field of gate valves, and in particular, to a spool assembly and a gate valve. Background Art

[0002] A gate valve is a valve that makes a reciprocating motion perpendicular to the channel direction in the channel through a gate plate to cut off or allow the passage of the channel.

[0003] In the spool assembly in the related art, in order to keep the sealing surfaces of the valve plate and the valve seat in contact, enhance the sealing performance, it is necessary to increase the pressure between the valve plate and the valve seat. However, increasing the pressure between the valve plate and the valve seat will result in a large opening and closing resistance, serious wear of the sealing surface, and shortening the service life of the gate valve. Summary of the Invention

[0004] The embodiments of the present application provide a spool assembly and a gate valve, which can improve the technical problem that it is difficult for the spool assembly in the related art to balance the sealing performance, operability and service life.

[0005] In a first aspect, the embodiments of the present application provide a spool assembly, and the spool assembly is applied to a gate valve; the gate valve includes a valve body, and the valve body has a valve body cavity; the spool assembly includes: A valve seat, which is arranged in the valve body cavity; A valve plate, which is movably arranged in the valve body cavity along its own height direction; at least one side surface of the valve plate is attached to the valve seat; A pressurizing device, which is arranged on the valve seat; the pressurizing device can move in a direction perpendicular to the height direction of the valve plate; Wherein, the pressurizing device is used for moving towards the valve plate in a direction perpendicular to the height direction of the valve plate during the process that the valve plate moves along its own height direction to close the gate valve, gradually moving to abut against one side of the valve plate, and gradually increasing the pressure acting on the valve plate, thereby increasing the contact pressure between the other side of the valve plate and the valve seat.

[0006] The above technical solutions in the embodiments of the present application have at least the following technical effects: The spool assembly provided by the embodiments of the present application can set a pressurizing device on the valve seat, so that when the valve plate moves along its own height direction to close the gate valve, the pressurizing device gradually moves towards the valve plate, so as to gradually increase the contact pressure between the sealing surface of the valve plate and the sealing surface of the valve seat, realize self-tightening sealing, effectively enhance the sealing effect when the gate valve is closed, and can dynamically adjust the contact pressure between the valve plate and the valve seat according to the use requirements, avoid the valve plate and the valve seat from always rubbing tightly, improve the operation convenience of the gate valve, enable the gate valve to adapt to different working conditions, extend the service life of the spool assembly, reduce the maintenance and replacement frequency of the gate valve, save the maintenance cost and downtime.

[0007] In some embodiments, the pressurizing device includes: A wedge-shaped assembly movably disposed on the valve seat in a direction perpendicular to the side surface of the valve plate; A pressing member movably disposed on the valve seat in a direction perpendicular to the side surface of the valve plate; the pressing member is spaced apart from the wedge-shaped assembly; the moving direction of the pressing member is opposite to that of the wedge-shaped assembly; A communication pipe passing through the valve body; one end of the communication pipe is connected to the end of the wedge-shaped assembly away from the valve plate; the other end of the communication pipe is connected to the end of the pressing member away from the valve plate.

[0008] In some embodiments, a first groove is formed in the valve seat in a direction perpendicular to the side surface of the valve plate; the wedge-shaped assembly includes: A wedge block movably disposed in the first groove in a direction perpendicular to the side surface of the valve plate; A closed cylinder movably disposed in the first groove; the outer wall of the closed cylinder is in sliding friction with the inner wall of the first groove; the closed cylinder has a through-hole space; A pushing member, one end of the pushing member is connected to the end of the wedge block away from the valve plate; the other end of the pushing member is movably connected to the closed cylinder; the pushing member can move in the through-hole space along the axial direction of the closed cylinder; the outer wall of the pushing member is in sliding friction with the inner wall of the closed cylinder; at least a part of the pushing member is located in the through-hole space.

[0009] In some embodiments, the gate valve further includes a flow channel; the flow channel is formed in the valve body in a direction perpendicular to the side surface of the valve plate; the number of the pressing members is multiple, and the multiple pressing members are uniformly and spaced apart along the circumferential direction of the flow channel and disposed on the valve seat; the number of the communication pipes is multiple, one ends of the multiple communication pipes are connected to the end of the wedge-shaped assembly away from the valve plate; the other ends of the multiple communication pipes are respectively connected to the ends of the multiple pressing members away from the valve plate.

[0010] In some embodiments, the communication pipe includes: A pipe body, one end of the pipe body is connected to the end of the wedge-shaped assembly away from the valve plate; the other end of the pipe body is connected to the end of the pressing member away from the valve plate; A piston movably disposed at one end of the pipe body along the axial direction of the pipe body; the outer side surface of the piston is in sliding friction with the inner side surface of the pipe body; a first space is formed jointly by the other side of the piston, the inner wall of the pipe body and the side of the pressing member away from the valve plate. A limiting part is provided at one end of the pipe body; the limiting part protrudes from the inner side surface of the pipe body; the limiting part is located on the side of the piston facing the valve plate; the limiting part is used to limit the piston from moving out of the pipe body along the axial direction of the pipe body. A pressure medium is filled in the first space.

[0011] In some embodiments, the closing cylinder includes: A cylinder body movably arranged in the first groove; the outer wall of the cylinder body has a sliding friction with the inner wall of the first groove. A moving groove is formed in the inner wall of the cylinder body along the axial direction of the cylinder body. A first elastic member is arranged in the moving groove along the axial direction of the cylinder body; one end of the first elastic member is arranged at the end of the moving groove far from the valve plate; the other end of the first elastic member is connected to the other end of the pushing member. An output hole is formed in the cylinder body along the height direction of the valve plate; the opening of the output hole faces the side away from the inner side surface of the valve body; the output hole can move to communicate with one end of the communication pipeline.

[0012] In some embodiments, a second space is formed jointly by the end of the pushing member far from the valve plate, the inner wall of the cylinder body, the inner wall of the first groove and the inner wall of the communication pipeline. The valve core assembly further includes a pressure relief valve arranged on the outer wall of the valve body; the input end of the pressure relief valve is communicated with the second space; the pressure relief valve is used to discharge the fluid in the second space.

[0013] In some embodiments, a first through hole is formed in the valve seat along the height direction of the valve plate; the first through hole is communicated with the first groove; the closing cylinder can move to disconnect the communication between the first through hole and the first groove.

[0014] In some embodiments, one end of the valve plate has an inclined surface; the inclined surface is matched with the inclined surface of the wedge block.

[0015] In a second aspect, an embodiment of the present application provides a gate valve, including a valve body and the valve core assembly as described in any one of the above embodiments, the valve body has a valve body cavity, and the valve core assembly is arranged in the valve body cavity. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the gate valve provided by the embodiment of the present application; Figure 2 Cross-sectional structural schematic diagram of the valve core assembly provided by the embodiment of the present application; Figure 3 Cross-sectional structural schematic diagram of another state of the valve core assembly provided by the embodiment of the present application; Figure 4 Partial structural schematic diagram of the valve core assembly provided by the embodiment of the present application.

[0018] Among them, the reference numerals in the drawings: 100, gate valve; 110, valve body; 120, flow channel; 200, valve core assembly; 210, valve seat; 211, first groove; 212, first through hole; 220, valve plate; 221, inclined surface; 230, pressurizing device; 231, wedge-shaped assembly; 2311, wedge block; 2312, closed cylinder; 23121, through hole space; 23122, cylinder body; 23123, moving groove; 23124, first elastic member; 23125, output hole; 2313, pushing member; 232, pressing member; 233, connecting pipe; 2331, pipe body; 2332, piston; 2333, limiting portion; 2334, first space; 234, second space; 235, pressure relief valve. Detailed implementation manners

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the following further details the present application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and do not limit the present application. The terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0024] In the present application, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0025] It should be noted that in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "in some embodiments", "exemplarily", "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Precisely, the use of words such as "in some embodiments", "exemplarily", "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in combination with the embodiments can be included in at least one embodiment of the present application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] A gate valve is a valve that makes a reciprocating motion perpendicular to the channel direction in the channel by a gate plate to cut off or allow the passage of the channel.

[0027] In the spool assembly in the related art, in order to keep the sealing surfaces of the valve plate and the valve seat in contact with each other and enhance the sealing performance, it is necessary to increase the pressure between the valve plate and the valve seat. However, increasing the pressure between the valve plate and the valve seat will result in a large resistance to opening and closing, serious wear of the sealing surface, and shortening of the service life of the gate valve.

[0028] Based on this, in order to improve the technical problem that it is difficult for the spool assembly in the related art to balance the sealing performance, operability and service life, the embodiments of the present application provide the following solutions.

[0029] Please refer to Figures 1 to 3 , the embodiments of the present application provide a spool assembly 200, and the spool assembly 200 is applied to a gate valve 100; the gate valve 100 further includes a valve body 110; the spool assembly 200 is disposed in the valve body 110; the valve body 110 has a valve body cavity; the spool assembly 200 includes a valve seat 210, a valve plate 220 and a pressurizing device 230, the valve seat 210 is disposed in the valve body cavity; the valve plate 220 is movably disposed in the valve body cavity along its own height direction; at least one side surface of the valve plate 220 is in contact with the valve seat 210; the pressurizing device 230 is disposed on the valve seat 210; the pressurizing device 230 can move along a direction perpendicular to the height direction of the valve plate 220; wherein, the pressurizing device 230 is used for moving towards the valve plate 220 along a direction perpendicular to the height direction of the valve plate 220 during the process that the valve plate 220 moves along its own height direction to close the gate valve 100, gradually moving to abut against one side of the valve plate 220, and gradually increasing the pressure acting on the valve plate 220, thereby increasing the contact pressure between the other side of the valve plate 220 and the valve seat 210.

[0030] It can be understood that the valve body 110 is the main structure for bearing the pressure of the medium in the pipeline and connecting the pipeline system. The valve body 110 can be made of cast iron or alloy steel, but is not limited thereto. The inner cavity of the valve body is the internal accommodation space of the valve body 110, which is used to accommodate the valve core assembly 200, enable the fluid to pass through, and enable the valve plate 220 to move within the valve body 110. The valve seat 210 is a component for providing a sealing surface to ensure the sealing performance of the gate valve 100. The valve seat 210 can be integral or split, but is not limited thereto. The split valve seat 210 is disposed in the valve body 110 relatively and spaced apart. The valve seat 210 can be disposed on the valve body 110 by welding or connected to the valve body 110 by bolts, but is not limited thereto. The valve plate 220 is a component for cooperating with the valve seat 210 and moving to control the opening and closing of the pipeline. The valve plate 220 has at least one sealing surface to frictionally cooperate with the sealing surface of the valve seat 210. The pressurizing device 230 is a component for increasing the contact pressure between the sealing surface of the valve plate 220 and the sealing surface of the valve seat 210. The pressurizing device 230 can include a sensor, a driving member, and an abutting member. The sensor is disposed at one end of the valve plate 220. The sensor is used to detect the position of the valve plate 220. The abutting member is movably disposed on the valve seat 210 along a direction perpendicular to the height direction of the valve seat 210. The driving member is disposed on the valve seat 210. The driving member is communicatively connected to the sensor. The power output end of the driving member is connected to the abutting member. The driving member is used to drive the abutting member to gradually move along a direction perpendicular to the height direction of the valve seat 210 according to the position of the valve plate 220 detected by the sensor, so as to gradually increase the contact pressure between the valve plate 220 and the valve seat 210; alternatively, the pressurizing device 230 can include a wedge block, a pipeline, and an abutting member. The wedge block is movably disposed on the valve seat 210 along a direction perpendicular to the height direction of the valve seat 210. The abutting member is movably disposed on the valve seat 210 along a direction perpendicular to the height direction of the valve seat 210. One end of the pipeline is connected to the plane side of the wedge block away from the valve plate 220. The other end of the pipeline is connected to the side of the abutting member away from the valve plate 220. A part of the wedge block is located inside the pipeline. A part of the wedge block can move along the axial direction of the pipeline inside the pipeline. A part of the abutting member is located inside the pipeline. A part of the abutting member can move along the axial direction of the pipeline inside the pipeline. During the process of the valve plate 220 moving to close the gate valve 100, the valve plate 220 pushes the wedge block to move towards the inside of the pipeline, and then pushes the abutting member to move towards the outside of the pipeline to abut against the valve plate 220, increasing the contact pressure between the valve plate 220 and the valve seat 210.

[0031] As can be seen from the above, for the spool assembly 200 provided in the embodiments of the present application, by providing a pressurizing device 230 on the valve seat 210, when the valve plate 220 moves along its own height direction to close the gate valve 100, the pressurizing device 230 gradually moves towards the valve plate 220, so as to gradually increase the contact pressure between the sealing surface of the valve plate 220 and the sealing surface of the valve seat 210, realizing self-tightening sealing, effectively enhancing the sealing effect when the gate valve 100 is closed, and being able to dynamically adjust the contact pressure between the valve plate 220 and the valve seat 210 according to the usage requirements, avoiding the continuous tight friction between the valve plate 220 and the valve seat 210, improving the operation convenience of the gate valve 100, enabling the gate valve 100 to adapt to different working conditions, extending the service life of the spool assembly 200, reducing the maintenance and replacement frequency of the gate valve 100, and saving the maintenance cost and downtime.

[0032] In some embodiments, please also refer to Figures 1 to 4 , the pressurizing device 230 includes a wedge-shaped assembly 231, a pressing member 232 and a connecting pipe 233. The wedge-shaped assembly 231 is movably arranged on the valve seat 210 along a direction perpendicular to the side surface of the valve plate 220; the pressing member 232 is movably arranged on the valve seat 210 along a direction perpendicular to the side surface of the valve plate 220; the pressing member 232 is spaced apart from the wedge-shaped assembly 231; the moving direction of the pressing member 232 is opposite to that of the wedge-shaped assembly 231; the connecting pipe 233 penetrates through the valve body 110; one end of the connecting pipe 233 is connected to one end of the wedge-shaped assembly 231 away from the valve plate 220; the other end of the connecting pipe 233 is connected to one end of the pressing member 232 away from the valve plate 220.

[0033] It can be understood that the wedge-shaped component 231 is a component that can move with the movement of the valve plate 220 after contacting the valve plate 220. The wedge-shaped component 231 is arranged on one side of the valve seat 210 in a direction perpendicular to the side surface of the valve plate 220. The wedge-shaped component 231 has an inclined surface 221 end and a flat end. The inclined surface 221 end faces the other side of the valve seat 210. The inclined surface 221 end is used to abut against one end of the valve plate 220 and enable the wedge-shaped component 231 to be pushed by the valve plate 220 to move in a direction away from the other side of the valve seat 210. The pressing member 232 is a component that is pushed by the wedge-shaped component 231 to move towards the valve plate 220 and increase the contact pressure between the valve plate 220 and the valve seat 210. The pressing member 232 has a contact plane. For example, the pressing member 232 can be a cube or a cylinder, but is not limited thereto. The connecting pipe 233 is a component that transmits the movement of the wedge-shaped component 231 to the pressing member 232 through hydraulic pressure. The connecting pipe 233 can be a rigid pipe, such as an iron pipe or a stainless steel pipe, or a flexible pipe, such as a rubber hose, but is not limited thereto. The connecting pipe 233 can be buried in the valve body 110 or penetrate through the valve body 110 so that part of the connecting pipe 233 is arranged outside the valve body 110, but is not limited thereto. Both ports of the connecting pipe 233 face the valve plate 220, and the axes of both ports of the connecting pipe 233 are perpendicular to the side surface of the valve plate 220. Part of the wedge-shaped component 231 is arranged in the connecting pipe 233, and the wedge-shaped component 231 can move along the axial direction of the connecting pipe 233. Part of the pressing member 232 is arranged in the connecting pipe 233, and the pressing member 232 can move along the axial direction of the connecting pipe 233.

[0034] With such a setting, by movably arranging the wedge-shaped component 231 on the valve seat 210 in a direction perpendicular to the side surface of the valve plate 220, arranging the pressing member 232 on the valve seat 210 in a direction perpendicular to the side surface of the valve plate 220, connecting the wedge-shaped component 231 and the pressing member 232 through the connecting pipe 233, and the wedge-shaped component 231 and the pressing member 232 can move along the axial direction of the connecting pipe 233. When the valve plate 220 moves to close the gate valve 100, the valve plate 220 moves towards the wedge-shaped component 231 until it abuts against the inclined surface 221 end of the wedge-shaped component 231, and continues to move to make the wedge-shaped component 231 move in a direction perpendicular to the side surface of the valve plate 220, that is, a part of the wedge-shaped component 231 moves into the connecting pipe 233 along the axial direction of the connecting pipe 233, thereby pushing the pressing member 232 to move towards the valve plate 220. As the valve plate 220 moves, the pressure generated by the pressing member 232 on the valve plate 220 gradually increases, and the contact pressure between the valve plate 220 and the valve seat 210 gradually increases. In this way, the movement of the valve plate 220 can be converted into an additional pressure on the valve plate 220, effectively improving the sealing performance of the gate valve 100. And when the valve plate 220 does not move to abut against the wedge-shaped component 231, no additional pressure is applied to the valve plate 220, which is beneficial to improving the operability of the gate valve 100, reducing the wear between the valve plate 220 and the valve seat 210, extending the service life of the gate valve 100, and reducing the frequency and cost of maintenance.

[0035] In some embodiments, please refer to Figure 2 and Figure 3 , a first groove 211 is formed on the valve seat 210 in a direction perpendicular to the side surface of the valve plate 220.

[0036] The wedge-shaped component 231 includes a wedge block 2311, a closed cylinder 2312 and a pushing member 2313. The wedge block 2311 is movably arranged in the first groove 211 in a direction perpendicular to the side surface of the valve plate 220; the closed cylinder 2312 is movably arranged in the first groove 211; the outer wall of the closed cylinder 2312 slides frictionally with the inner wall of the first groove 211; the closed cylinder 2312 has a through-hole space 23121; one end of the pushing member 2313 is connected to the end of the wedge block 2311 away from the valve plate 220; the other end of the pushing member 2313 is movably connected to the closed cylinder 2312; the pushing member 2313 can move in the through-hole space 23121 along the axial direction of the closed cylinder 2312; the outer wall of the pushing member 2313 slides frictionally with the inner wall of the closed cylinder 2312; at least a part of the pushing member 2313 is located in the through-hole space 23121.

[0037] It can be understood that the first groove 211 is used to limit the moving direction of the wedge block 2311 and accommodate the wedge block 2311. The inner side surface of the first groove 211 has a sliding friction with the outer side surface of the wedge block 2311. The depth of the first groove 211 is greater than or equal to the sum of the lengths of the wedge block 2311 and the closing cylinder 2312, and the wedge block 2311 can move to be completely located within the first groove 211. The first groove 211 is lower than the flow channel 120 in the height direction of the gate valve 100, so that after the valve plate 220 completely cuts off the flow channel 120, one end of the valve plate 220 abuts against the wedge block 2311. The wedge block 2311 is a component that decomposes the pressure received from the valve plate 220 into a force perpendicular to the side direction of the valve plate 220 through the inclined surface 221. The wedge block 2311 has an inclined surface 221 end and a flat end. The closing cylinder 2312 is a component used to accommodate the conductive medium and enable at least part of the pushing member 2313 to move inside the closing cylinder 2312 to push the conductive medium, thereby transmitting force. The conductive medium can be a gas, such as air, carbon dioxide; it can also be a liquid, such as water, oil; or a solid, such as a push rod, solid particles, etc., but is not limited thereto. The inner side wall of the closing cylinder 2312 has a sliding friction with at least part of the outer side surface of the pushing member 2313, forming a closed space inside the closing cylinder 2312 and being able to generate an increased pressure in the closed space. The through-hole space 23121 is connected to the communicating pipe 233. The closed space communicates with the communicating pipe 233. The pushing member 2313 is a component used to move along the axis direction of the closing cylinder 2312 under the push of the wedge block 2311. The outer wall of the pushing member 2313 has a sliding friction with the inner wall of the closing cylinder 2312. The inner side surface of the end of the pushing member 2313 far from the wedge block 2311, the inner side surface of the end of the closing cylinder 2312 far from the wedge block 2311, and the inner wall of the closing cylinder 2312 together form a closed space. The pushing member 2313 can be a cylinder or a cube, but is not limited thereto.

[0038] With such a setting, a first groove 211 is formed in the valve seat 210 along a direction perpendicular to the side surface of the valve plate 220. The wedge block 2311 is arranged in the first groove 211, and a part of the wedge block 2311 protrudes from the first groove 211. One end of the wedge block 2311 away from the valve plate 220 is connected to one end of the pushing member 2313, and the other end of the pushing member 2313 is movably connected to the inner side wall of the closing cylinder 2312. The closing cylinder 2312 is arranged in the first groove 211. During the closing process of the gate valve 100, after the valve plate 220 cuts off the flow passage 120, the valve plate 220 continues to move until it abuts against the wedge block 2311, and gradually pushes the wedge block 2311 into the first groove 211, causing the pushing member 2313 to gradually move into the closing cylinder 2312, gradually compressing the closed space, increasing the pressure in the closed space gradually, and further increasing the pressure in the communicating pipe 233, pushing the pressing member 232 at the other end of the communicating pipe 233 towards the valve plate 220, gradually increasing the contact pressure between the valve plate 220 and the valve seat 210. In this way, when the gate valve 100 is in the closing process and has not yet abutted against the wedge block 2311, no extra pressure is applied between the valve plate 220 and the valve seat 210, which is beneficial to improving the operation convenience of the gate valve 100, reducing the friction between the valve plate 220 and the valve seat 210, effectively extending the service life of the gate valve 100, and reducing the frequency and cost of maintenance.

[0039] In some embodiments, referring to Figures 1 to 3 , the gate valve 100 further includes a flow passage 120; the flow passage 120 is formed in the valve body 110 along a direction perpendicular to the side surface of the valve plate 220; the number of the pressing members 232 is multiple, and the multiple pressing members 232 are evenly and spaced along the circumferential direction of the flow passage 120 and arranged on the valve seat 210.

[0040] It can be understood that the flow passage 120 is a passage in the valve body 110 for allowing fluid to pass through.

[0041] With such a setting, by evenly and spacedly arranging multiple pressing members 232 along the circumferential direction of the flow passage 120, the pressure transmitted by the wedge-shaped assembly 231 can be evenly distributed on the valve plate 220, so that the contact pressure between the valve plate 220 and the valve seat 210 is evenly distributed, effectively improving the sealing performance of the gate valve 100, reducing the leakage risk, and avoiding deformation of the valve plate 220 and the valve seat 210 caused by uneven friction between the valve plate 220 and the valve seat 210, extending the service life of the gate valve 100, and reducing the maintenance requirements.

[0042] In some embodiments, referring to Figures 1 to 3, the connecting pipe 233 includes a pipe body 2331, a piston 2332, a limiting portion 2333 and a pressure medium. One end of the pipe body 2331 is connected to one end of the wedge-shaped assembly 231 away from the valve plate 220; the other end of the pipe body 2331 is connected to one end of the pressing member 232 away from the valve plate 220; the piston 2332 is movably arranged in the pipe body 2331 along the axial direction of the pipe body 2331; the outer side surface of the piston 2332 slides frictionally with the inner side surface of the pipe body 2331; on the other side of the piston 2332, the inner wall of the pipe body 2331 and the side of the pressing member 232 away from the valve plate 220 together form a first space 2334; the limiting portion 2333 is arranged at one end of the pipe body 2331; the limiting portion 2333 protrudes from the inner side surface of the pipe body 2331; the limiting portion 2333 is located on the side of the piston 2332 facing the valve plate 220; the limiting portion 2333 is used to limit the piston 2332 from moving out of the pipe body 2331 along the axial direction of the pipe body 2331; the pressure medium is filled in the first space 2334.

[0043] It can be understood that the pipe body 2331 is a component for connecting the wedge-shaped assembly 231 and the pressing member 232 and transmitting the force of the wedge-shaped assembly 231 to the pressing member 232. The pipe body 2331 can be a square pipe or a circular pipe, but is not limited thereto. The pipe body 2331 can be entirely buried in the valve seat 210 and the valve body 110, or can partially penetrate outside the valve body 110, but is not limited thereto. The piston 2332 is a component arranged in the pipe body 2331 and movable along the axis of the pipe body 2331. An elastic seal, such as a rubber sealing ring, can be arranged on the outer side surface of the piston 2332; a hard seal, such as a metal sealing ring, can also be arranged, but is not limited thereto. The limiting portion 2333 is a component for limiting the piston 2332 from moving out of the pipe body 2331 along the axis of the pipe body 2331. The limiting portion 2333 can be a raised block arranged on the inner wall of one end of the pipe body 2331, or can be an annular body arranged at one end of the pipe body 2331. The inner diameter of the annular body is smaller than the outer diameter of the piston 2332, so that the piston 2332 cannot move out of the pipe body 2331, but is not limited thereto. The pressure medium is an object filled in the pipe body 2331 and located between the piston 2332 and the pressing member 232. The pressure medium can be a gas, or an incompressible or slightly compressible liquid or solid to accurately transmit pressure. For example, the pressure medium can be air, water, hydraulic oil or sand grains, but is not limited thereto.

[0044] Set as such, insert the pipe body 2331 through the valve seat 210, connect one end of the pipe body 2331 to the end of the wedge-shaped component 231 away from the valve plate 220, and connect the other end of the pipe body 2331 to the end of the pressure-applying component 232 away from the valve plate 220. A piston 2332 capable of moving along the axial direction of the pipe body 2331 is arranged inside the pipe body 2331. A pressure medium is filled in the first space 2334 jointly formed by the inner wall of the pipe body 2331 on the side of the piston 2332 away from the wedge-shaped component 231 and the side of the pressure-applying component 232 away from the valve plate 220. When the wedge-shaped component 231 moves with the push of the valve plate 220, the wedge-shaped component 231 can push the piston 2332 to move, and the movement of the piston 2332 is transmitted to the pressure-applying component 232 through the pressure medium, so that the pressure-applying component 232 moves towards the valve plate 220 along the axial direction of the pipe body 2331. By converting the pressure generated by the movement of the valve plate 220 on the wedge-shaped component 231 into the pressure exerted by the pressure-applying component 232 on the valve plate 220, the gate valve 100 realizes self-tightening sealing, and the pressure can be stably and accurately transmitted through the connecting pipe 233, improving the stability and reliability of the control of the gate valve 100, improving the controllability of the contact pressure between the valve plate 220 and the valve seat 210. The split structure is conducive to reducing the difficulty of maintenance work and improving the maintenance efficiency.

[0045] In some embodiments, refer to Figures 2 to 4 , the closed cylinder 2312 includes a cylinder body 23122, a moving groove 23123, a first elastic member 23124, and an output hole 23125. The cylinder body 23122 is movably arranged in the first groove 211; the outer wall of the cylinder body 23122 has a sliding friction with the inner wall of the first groove 211; the moving groove 23123 is opened on the inner wall of the cylinder body 23122 along the axial direction of the cylinder body 23122; the first elastic member 23124 is arranged in the moving groove 23123 along the axial direction of the cylinder body 23122; one end of the first elastic member 23124 is arranged at the end of the moving groove 23123 away from the valve plate 220; the other end of the first elastic member 23124 is connected to the other end of the pushing member 2313; the output hole 23125 is opened on the cylinder body 23122 along the height direction of the valve plate 220; the opening of the output hole 23125 faces the side away from the inner side of the valve body 110; the output hole 23125 can move to communicate with one end of the connecting pipe 233.

[0046] It can be understood that the cylinder body 23122 is a support structure. The cylinder body 23122 can be a cylindrical tube or a square tube, but is not limited thereto. The cylinder body 23122 is provided with a moving groove 23123 along its own axis. The number of the moving grooves 23123 can be one or two. The two moving grooves 23123 are opposite and spaced apart, or there can be multiple moving grooves 23123. The multiple moving grooves 23123 are evenly and spacedly arranged on the cylinder body 23122 along the axial direction of its own axis. The moving groove 23123 is used to limit the moving direction of the pushing member 2313, so that the pushing member 2313 moves along the axis direction of the cylinder body 23122. The first elastic member 23124 is arranged in the moving groove 23123 along the axis direction of the cylinder body 23122. The first elastic member 23124 is used to push the pushing member 2313 towards the valve plate 220. When the first elastic member 23124 is not subjected to an external force, it is in an extended state. At this time, the pressure of the first elastic member 23124 acting on the pushing member 2313 is greater than the frictional force between the outer wall of the cylinder body 23122 and the inner wall of the first groove 211. When the valve plate 220 abuts against the wedge block 2311, the pushing member 2313 is pushed in a direction away from the valve plate 220, so that the first elastic member 23124 is compressed. The first elastic member 23124 can be a copper spring or an airbag, but is not limited thereto. The output hole 23125 is a component used to communicate with one end of the communication pipe 233 when the cylinder body 23122 moves to abut against the bottom surface of the first groove 211.

[0047] With such a setting, the moving range and direction of the pushing member 2313 are limited by the cylinder body 23122. The moving groove 23123 is opened in the cylinder body 23122, and the elastic member is arranged in the moving groove 23123. After the pushing member 2313 moves along the axis direction of the cylinder body 23122, it can return to the initial position near the valve plate 220 end of the cylinder body 23122. By moving the cylinder body 23122, the output hole 23125 can be connected to the connection channel, reducing the space between the pushing member 2313 and the piston 2332 in the connection channel, so that the movement of the pushing member 2313 can be accurately transmitted to the pressing member 232, improving the sensitivity of controlling the contact pressure between the valve plate 220 and the valve seat 210, and enabling the transmitted pressure to be more stable, effectively making the gate valve 100 easier to operate.

[0048] Optionally, the closing cylinder 2312 further includes a second elastic member. One end of the second elastic member is arranged at the end of the closing cylinder 2312 away from the valve plate 220, and the other end of the second elastic member is arranged at the bottom surface of the first groove 211.

[0049] It can be understood that the second elastic member can adopt the same structure as the first elastic member 23124.

[0050] With such a setting, by setting the second elastic member and the first elastic member 23124, when the valve plate 220 is not in contact with the wedge 2311, the closing cylinder 2312 can move under the push of the second elastic member until one end of the closing cylinder 2312 away from the valve plate 220 is spaced from the bottom surface of the first groove 211, the output hole 23125 is not communicated with the communication pipe 233, and one end of the pusher 2313 away from the valve plate 220 is located at one end of the closing cylinder 2312 close to the valve plate 220. In this way, there is no need for manual operation to reset the wedge 2311 and the closing cylinder 2312, which can improve the fluency and stability during the operation of the gate valve 100.

[0051] In some embodiments, please refer to Figure 2 and Figure 3 , a first through hole 212 is formed in the valve seat 210 along the height direction of the valve plate 220; the first through hole 212 communicates with the first groove 211; the closing cylinder 2312 can move to disconnect the communication between the first through hole 212 and the first groove 211.

[0052] It can be understood that one end of the first through hole 212 communicates with the first groove 211, and the other end communicates with the flow channel 120.

[0053] With such a setting, by forming the first through hole 212 in the valve seat 210, so that one end of the first through hole communicates with the first groove 211 and the other end communicates with the flow channel 120. In this way, when the gate valve 100 is opened, the fluid in the flow channel can enter the first groove 211. During the closing process of the gate valve 100, the valve plate 220 abuts against the wedge 2311 and pushes the wedge 2311 into the first groove 211. The closing cylinder 2312 moves in a direction away from the valve plate 220, disconnecting the communication between the first through hole 212 and the first groove 211, isolating the flow channel 120 and the first space 2334, and making the output hole 23125 communicate with the communication pipe 233. The valve plate 220 pushes the wedge 2311 to move so that the pusher 2313 moves in a direction away from the valve plate 220, pushing the fluid in the closing cylinder 2312 into the communication pipe 233, thereby pushing the piston 2332 to move and pushing the pressure-applying member 232 towards the valve plate 220, increasing the contact pressure between the valve plate 220 and the valve seat 210. Using the fluid passing through the gate valve 100 as the medium for transmitting pressure, without external supplementation, effectively simplifies the operation process of the gate valve 100, improves the independence and operation convenience of the gate valve 100, and at the same time can prevent the fluid in the closing cylinder 2312 from flowing back into the flow channel 120, which is beneficial to maintaining the stability of the sealing pressure and ensuring the reliability of the seal of the gate valve 100.

[0054] In some embodiments, please refer to Figures 1 to 3, the spool assembly 200 further includes a pressure relief valve 235, which is disposed on the outer wall of the valve body 110; the input end of the pressure relief valve 235 communicates with the second space 234; the pressure relief valve 235 is used to discharge the fluid in the second space 234.

[0055] It can be understood that the pressure relief valve 235 is a component for discharging the objects in the second space 234. The output end of the pressure relief valve 235 can face outside the valve body 110 or communicate with the output end of the flow channel 120, but is not limited thereto. The pressure relief valve 235 can adopt valve bodies 110 such as butterfly valves and ball valves, but is not limited thereto.

[0056] With such a setting, by arranging the pressure relief valve 235 outside the valve body 110, the pressure relief valve 235 can discharge the fluid in the second space 234 to the outside of the valve body 110 or to the output end of the flow channel 120. When it is necessary to open the gate valve 100, the fluid in the second space 234 is discharged through the pressure relief valve 235, so that the piston 2332 in the connecting pipe 233 moves towards the valve plate 220, and the pressing member 232 moves in a direction away from the valve plate 220, reducing the contact pressure between the valve plate 220 and the valve seat 210. Furthermore, it makes it easier and faster to open the gate valve 100, reduces the friction between the valve plate 220 and the valve seat 210, effectively extends the working life of the gate valve 100, improves the convenience of the opening and closing operation of the gate valve 100, and ensures that the gate valve 100 has a stable sealing performance.

[0057] In some embodiments, please refer to Figure 2 and Figure 3 , one end of the valve plate 220 has an inclined surface 221; the inclined surface 221 matches the inclined surface 221 of the wedge block 2311.

[0058] Optionally, one end of the valve plate 220 is an arc surface.

[0059] With such a setting, by arranging an inclined surface 221 or an arc surface at one end of the valve plate 220, the contact pressure between the valve plate 220 and the wedge block 2311 is reduced, avoiding jamming during the opening and closing process of the gate valve 100, reducing the force required for the opening and closing operation of the gate valve 100, and extending the service life of the wedge block 2311 and the valve plate 220.

[0060] Please refer to Figures 1 to 4 , the embodiment of the present application further provides a gate valve 100, which includes a valve body 110 and a spool assembly 200 as described in any one of the above embodiments. The valve body 110 has a valve body cavity; the spool assembly 200 is disposed in the valve body cavity.

[0061] As can be seen from the above, the gate valve 100 provided by the embodiment of the present application is provided with a pressurizing device 230 on the valve seat 210. When the valve plate 220 moves along its own height direction to close the gate valve 100, the pressurizing device 230 gradually moves towards the valve plate 220 to gradually increase the contact pressure between the sealing surface of the valve plate 220 and the sealing surface of the valve seat 210, realizing self-tightening sealing, effectively enhancing the sealing effect when the gate valve 100 is closed, and being able to dynamically adjust the contact pressure between the valve plate 220 and the valve seat 210 according to the usage requirements, avoiding the valve plate 220 and the valve seat 210 from always rubbing tightly, improving the operation convenience of the gate valve 100, enabling the gate valve 100 to adapt to different working conditions, prolonging the service life of the valve core assembly 200, reducing the maintenance and replacement frequency of the gate valve 100, and saving the maintenance cost and downtime.

[0062] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A spool assembly, characterized in that, The spool assembly is applied to a gate valve; the gate valve includes a valve body having a valve inner cavity; the spool assembly includes: a valve seat disposed in the valve inner cavity; a valve plate movably disposed in the valve inner cavity along its own height direction; at least one side surface of the valve plate abuts against the valve seat; a pressurizing device disposed on the valve seat; the pressurizing device is capable of moving in a direction perpendicular to the height direction of the valve plate; wherein, the pressurizing device is configured to move towards the valve plate in a direction perpendicular to the height direction of the valve plate during the process of the valve plate moving along its own height direction to close the gate valve, gradually move to abut against one side of the valve plate, and gradually increase the pressure acting on the valve plate, thereby increasing the contact pressure between the other side of the valve plate and the valve seat.

2. The spool assembly according to claim 1, wherein, The pressurizing device includes: a wedge-shaped assembly movably disposed on the valve seat in a direction perpendicular to the side surface of the valve plate; a pressing member movably disposed on the valve seat in a direction perpendicular to the side surface of the valve plate; the pressing member is spaced from the wedge-shaped assembly; the moving direction of the pressing member is opposite to that of the wedge-shaped assembly; a connecting pipe passing through the valve body; one end of the connecting pipe is connected to the end of the wedge-shaped assembly away from the valve plate; the other end of the connecting pipe is connected to the end of the pressing member away from the valve plate.

3. The spool assembly according to claim 2, wherein, A first groove is formed in the valve seat in a direction perpendicular to the side surface of the valve plate; the wedge-shaped assembly includes: a wedge block movably disposed in the first groove in a direction perpendicular to the side surface of the valve plate; a closed cylinder movably disposed in the first groove; the outer wall of the closed cylinder has a sliding friction with the inner wall of the first groove; the closed cylinder has a through-hole space; a pushing member, one end of the pushing member is connected to the end of the wedge block away from the valve plate; the other end of the pushing member is movably connected to the closed cylinder; the pushing member is capable of moving in the axial direction of the closed cylinder within the through-hole space; the outer wall of the pushing member has a sliding friction with the inner wall of the closed cylinder; at least a part of the pushing member is located within the through-hole space.

4. The spool assembly according to claim 2, wherein, The gate valve further includes a flow channel; the flow channel is formed in the valve body in a direction perpendicular to the side surface of the valve plate; the number of the pressing members is multiple, and the multiple pressing members are uniformly and spaced apart along the circumference of the flow channel and disposed on the valve seat; the number of the connecting pipes is multiple, one ends of the multiple connecting pipes are connected to the end of the wedge-shaped assembly away from the valve plate; the other ends of the multiple connecting pipes are respectively connected to the ends of the multiple pressing members away from the valve plate.

5. The spool assembly according to claim 2, wherein The connecting pipe includes: a pipe body, one end of the pipe body is connected to the end of the wedge-shaped assembly away from the valve plate; the other end of the pipe body is connected to the end of the pressing member away from the valve plate; A piston, which is movably arranged at one end of the pipe body along the axial direction of the pipe body; the outer side surface of the piston has a sliding friction with the inner side surface of the pipe body; on the other side of the piston, the inner wall of the pipe body and the side of the pressure-applying member away from the valve plate jointly form a first space; A limiting part, which is arranged at one end of the pipe body; the limiting part protrudes from the inner side surface of the pipe body; the limiting part is located on the side of the piston facing the valve plate; the limiting part is used to limit the piston from moving along the axial direction of the pipe body to the outside of the pipe body; A pressure medium, which is filled in the first space.

6. The spool assembly according to claim 3, wherein, The closed cylinder includes: A cylinder body, which is movably arranged in the first groove; the outer wall of the cylinder body has a sliding friction with the inner wall of the first groove; A moving groove, which is opened on the inner wall of the cylinder body along the axial direction of the cylinder body; A first elastic member, which is arranged in the moving groove along the axial direction of the cylinder body; one end of the first elastic member is arranged at the end of the moving groove away from the valve plate; the other end of the first elastic member is connected to the other end of the pushing member; An output hole, which is opened on the cylinder body along the height direction of the valve plate; the opening of the output hole faces the side away from the inner side surface of the valve body; the output hole can move to communicate with one end of the communication pipeline.

7. The spool assembly according to claim 6, wherein, A second space is jointly formed by the end of the pushing member away from the valve plate, the inner wall of the cylinder body, the inner wall of the first groove and the inner wall of the communication pipeline; The valve core assembly further includes a pressure relief valve, which is arranged on the outer wall of the valve body; the input end of the pressure relief valve is communicated with the second space; the pressure relief valve is used to discharge the fluid in the second space.

8. The spool assembly according to claim 3, characterized in that, A first through hole is opened on the valve seat along the height direction of the valve plate; the first through hole is communicated with the first groove; the closed cylinder can move to disconnect the communication between the first through hole and the first groove.

9. The spool assembly according to claim 3, characterized in that, One end of the valve plate has an inclined surface; the inclined surface is matched with the inclined surface of the wedge block.

10. A gate valve, characterized in that, Comprising: A valve body, having a valve body cavity; and The valve core assembly according to any one of claims 1 to 9, which is arranged in the valve body cavity.

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