CN120332499A

CN120332499A - Valve core assembly and gate valve

Info

Publication number: CN120332499A
Application number: CN202510722735.3A
Authority: CN
Inventors: 项志豪; 项晓峰; 陈丰; 张洪伟; 朱国强; 方乐义; 项旖旎
Original assignee: Zhejiang Futai Valve Technology Co ltd; Zhejiang College of Security Technology
Current assignee: Zhejiang Futai Valve Technology Co ltd; Zhejiang College of Security Technology
Priority date: 2025-05-30
Filing date: 2025-05-30
Publication date: 2025-07-18

Abstract

The present application relates to the field of gate valve technology, and provides a valve core assembly and a gate valve, wherein the valve core assembly includes a valve seat, a valve plate and a pressure device, wherein the valve seat is arranged in the inner cavity of the valve body; the valve plate can be arranged in the inner cavity of the valve body movably along its own height direction; at least one side of the valve plate is attached to the valve seat; the pressure device is arranged on the valve seat; the pressure device can move in a direction perpendicular to the height direction of the valve plate; wherein the pressure device is used to gradually increase the pressure acting on the valve plate during the process of closing the gate valve, thereby increasing the contact pressure between the valve plate and the valve seat. The valve core assembly provided in the present application realizes a self-tightening seal by arranging a pressure device on the valve seat, so that when the valve plate moves along its own height direction to close the gate valve, the contact pressure between the sealing surface of the valve plate and the sealing surface of the valve seat is gradually increased by the pressure device, thereby effectively enhancing the sealing effect when the gate valve is closed.

Description

Valve core assembly and gate valve

Technical Field

The application relates to the technical field of gate valves, in particular to a valve core assembly and a gate valve.

Background

The gate valve is a valve which makes a reciprocating motion perpendicular to the direction of the channel in the channel through a gate plate so as to stop or circulate the channel.

In order to keep the sealing surfaces of the valve plate and the valve seat attached, the valve core assembly in the related art needs to increase the pressure between the valve plate and the valve seat, but the pressure between the valve plate and the valve seat is increased to cause larger opening and closing resistance, the sealing surfaces are seriously worn, and the service life of the gate valve is shortened.

Disclosure of Invention

The embodiment of the application provides a valve core assembly and a gate valve, which can solve the technical problems that the valve core assembly in the related art is difficult to consider sealing performance, operability and service life.

In a first aspect, an embodiment of the present application provides a valve core assembly, where the valve core assembly is applied to a gate valve, the gate valve includes a valve body, the valve body has a valve body cavity, and the valve core assembly includes:

the valve seat is arranged in the inner cavity of the valve body;

the valve plate is movably arranged in the inner cavity of the valve body along the height direction of the valve plate, and at least one side surface of the valve plate is attached to the valve seat;

The pressurizing device is arranged on the valve seat and can move along the direction perpendicular to the height direction of the valve plate;

The pressurizing device is used for moving towards the valve plate along the direction perpendicular to the height direction of the valve plate in the process that the valve plate moves along the height direction of the valve plate to close the gate valve, gradually moving to be abutted to one side of the valve plate, gradually increasing the pressure acting on the valve plate, and further increasing the contact pressure between the other side of the valve plate and the valve seat.

The technical scheme provided by the embodiment of the application at least has the following technical effects:

According to the valve core assembly provided by the embodiment of the application, the pressurizing device is arranged on the valve seat, so that when the valve plate moves along the height direction of the valve plate to close the valve, the pressurizing device gradually moves towards the valve plate to gradually increase the contact pressure between the sealing surface of the valve plate and the sealing surface of the valve seat, so that self-tightening sealing is realized, the sealing effect is effectively enhanced when the valve plate is closed, the contact pressure between the valve plate and the valve seat can be dynamically regulated according to the use requirement, the valve plate and the valve seat are prevented from being tightly rubbed all the time, the convenience of the operation of the valve is improved, the valve can adapt to different working conditions, the service life of the valve core assembly is prolonged, the maintenance and replacement frequency of the valve plate is reduced, and the maintenance cost and the downtime are saved.

In some embodiments, the pressurizing device comprises:

a wedge assembly movably disposed on the valve seat in a direction perpendicular to a side surface of the valve plate;

The pressing piece is movably arranged on the valve seat along the direction perpendicular to the side surface of the valve plate, and is spaced from the wedge-shaped component;

The communication pipeline is arranged on the valve body in a penetrating way; one end of the communicating pipeline is connected with one end of the wedge-shaped component, which is far away from the valve plate, and the other end of the communicating pipeline is connected with one end of the pressure applying piece, which is far away from the valve plate.

In some embodiments, the valve seat is provided with a first groove along a direction perpendicular to the side surface of the valve plate, and the wedge assembly comprises:

the wedge block is movably arranged in the first groove along the direction perpendicular to the side surface of the valve plate;

The sealing cylinder is movably arranged in the first groove, and the outer wall of the sealing cylinder is in sliding friction with the inner wall of the first groove;

The device comprises a wedge block, a pushing piece, a sealing cylinder, a through hole space, a sliding friction piece and a sealing cylinder, wherein one end of the pushing piece is connected with one end of the wedge block, which is far away from the valve plate, the other end of the pushing piece is movably connected with the sealing cylinder, the pushing piece can move in the through hole space along the axial direction of the sealing cylinder, the outer wall of the pushing piece is in sliding friction with the inner wall of the sealing cylinder, and at least part of the pushing piece is positioned in the through hole space.

In some embodiments, the gate valve further comprises a flow passage, the flow passage is arranged on the valve body in a direction perpendicular to the side face of the valve plate, the number of the pressing pieces is multiple, the pressing pieces are uniformly and alternately arranged on the valve seat along the circumferential direction of the flow passage, the number of the communicating pipes is multiple, one ends of the communicating pipes are connected to one end of the wedge-shaped assembly, which is far away from the valve plate, and the other ends of the communicating pipes are connected to one end of the pressing pieces, which is far away from the valve plate, in a one-to-one correspondence.

In some embodiments, the communication conduit comprises:

The pipe body, one end of the said pipe body connects to one end of the said wedge assembly far away from the said valve plate;

The piston 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 and the inner side surface of the pipe body are in sliding friction, and a first space is formed by the other side of the piston, the inner wall of the pipe body and one side of the pressing piece away from the valve plate;

The limiting part is arranged at one end of the pipe body; the limiting part is positioned at one side of the piston facing the valve plate and used for limiting the piston to move outside the pipe body along the axial direction of the pipe body;

and a pressure medium filled in the first space.

In some embodiments, the closure cartridge comprises:

the cylinder body is movably arranged in the first groove, and the outer wall of the cylinder body and the inner wall of the first groove slide and rub;

The moving groove is formed in the inner wall of the cylinder body along the axial direction of the cylinder body;

the device comprises a cylinder body, a valve plate, a first elastic piece, a second elastic piece, a first elastic piece and a second elastic piece, wherein the first elastic piece is arranged in the moving groove along the axial direction of the cylinder body;

The output hole is formed in the cylinder body along the height direction of the valve plate; the opening of the output hole faces to one side far away from the inner side surface of the valve body, and the output hole can move to be communicated with one end of the communication pipeline.

In some embodiments, a second space is formed by one end of the pushing piece 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 comprises a pressure relief valve, the pressure relief valve is arranged on the outer wall of the valve body, the input end of the pressure relief valve is communicated with the second space, and the pressure relief valve is used for discharging fluid in the second space.

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, and the sealing cylinder can move to disconnect the communication between the first through hole and the first groove.

In some embodiments, one end of the valve plate has a chamfer that mates with the chamfer of the wedge.

In a second aspect, an embodiment of the present application provides a gate valve, including a valve body and a valve core assembly according to any one of the above embodiments, the valve body having a valve body cavity, the valve core assembly being disposed in the valve body cavity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a gate valve according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a valve core assembly according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view illustrating another state of a valve core assembly according to an embodiment of the present application;

Fig. 4 is a schematic view of a part of a structure of a valve core assembly according to an embodiment of the present application.

Wherein, each reference sign in the figure:

100. Gate valve, 110, valve body, 120, runner, 200, valve core assembly, 210, valve seat, 211, first groove, 212, first through hole, 220, valve plate, 221, inclined plane, 230, pressurizing device, 231, wedge assembly, 2311, wedge, 2312, closed cylinder, 23121, through hole space, 23122, cylinder, 23123, moving groove, 23124, first elastic piece, 23125, output hole, 2313, pushing piece, 232, pressurizing piece, 233, communicating pipe, 2331, pipe body, 2332, piston, 2333, limiting part, 2334, first space, 234, second space, 235, pressure release valve.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the application. The terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be 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 be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, "and/or" is merely an association relationship describing the association object, and means that three relationships may exist, for example, a and/or B may mean that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, in the present application, words such as "in some embodiments," "illustratively," "for example," and the like are used to indicate examples, illustrations, or descriptions. Any embodiment or design described herein as "in some embodiments," "illustratively," "for example," should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in some embodiments," "illustratively," "for example," and the like is intended to present related concepts in a concrete fashion, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Based on the above, in order to solve the technical problem that the valve core assembly in the related art is difficult to consider sealing performance, operability and service life, the following scheme is provided in the embodiment of the application.

Referring to fig. 1 to 3 together, the embodiment of the application provides a valve core assembly 200, the valve core assembly 200 is applied to a gate valve 100, the gate valve 100 further comprises a valve body 110, the valve core assembly 200 is arranged in the valve body 110, the valve body 110 is provided with a valve body cavity, the valve core assembly 200 comprises a valve seat 210, a valve plate 220 and a pressurizing device 230, the valve seat 210 is arranged in the valve body cavity, the valve plate 220 is movably arranged in the valve body cavity along the height direction, at least one side surface of the valve plate 220 is attached to the valve seat 210, the pressurizing device 230 is arranged on the valve seat 210, the pressurizing device 230 can move along the 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 the direction perpendicular to the height direction of the valve plate 220 in the process of closing the gate valve 100, gradually moves to be abutted against one side of the valve plate 220, and gradually increases the pressure acted on the valve plate 220, and further increases the contact pressure between the other side of the valve plate 220 and the valve seat 210.

It will be appreciated that the valve body 110 is a main structure for bearing the pressure of the medium in the pipeline and connecting the pipeline system, and the valve body 110 may be made of cast iron or alloy steel, but is not limited thereto. The valve body cavity is an internal receiving space of the valve body 110 for receiving the valve cartridge assembly 200, allowing fluid to pass therethrough, and allowing the valve plate 220 to move within the valve body 110. The valve seat 210 is a member for providing a sealing surface to secure the sealing performance of the gate valve 100, and the valve seat 210 may be a single piece or two pieces, but is not limited thereto. The two-piece valve seat 210 is disposed opposite and spaced apart within the valve body 110. The valve seat 210 may be provided to the valve body 110 by welding or may be coupled to the valve body 110 by a bolt, but is not limited thereto. Valve plate 220 is an opening and closing member for engaging valve seat 210 for movement to control a conduit, and valve plate 220 has at least one sealing surface for friction engagement with the sealing surface of 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, and the pressurizing device 230 may include a sensor disposed at one end of the valve plate 220, the sensor being configured to detect the position of the valve plate 220, an abutting member movably disposed on the valve seat 210 in a direction perpendicular to the height direction of the valve seat 210, a driving member disposed on the valve seat 210, the driving member being communicatively connected to the sensor, a power output end of the driving member being connected to the abutting member, the driving member being configured to drive the abutting member to gradually move in 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; or the pressurizing device 230 may include a wedge block movably disposed on the valve seat 210 in a direction perpendicular to the height direction of the valve seat 210, a pipe having one end connected to a plane side of the wedge block away from the valve plate 220 and the other end connected to a side of the pipe away from the valve plate 220, and an abutment member having a portion located in the pipe, a portion of the wedge block being movable in the pipe in an axial direction of the pipe, a portion of the abutment member being movable in the pipe in an axial direction of the pipe, and during the movement of the valve plate 220 to close the valve 100, the valve plate 220 pushes the wedge block to move toward the pipe and the abutment member to move toward the outside of the pipe to abut the valve plate 220, increasing a contact pressure between the valve plate 220 and the valve seat 210.

As can be seen from the above, in the valve core assembly 200 provided in the embodiment of the present application, by arranging the pressurizing device 230 on the valve seat 210, when the valve plate 220 moves along the height direction thereof 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, thereby realizing self-tightening sealing, effectively enhancing the sealing effect when the gate valve 100 is closed, dynamically adjusting the contact pressure between the valve plate 220 and the valve seat 210 according to the use requirement, avoiding the constant tight friction between the valve plate 220 and the valve seat 210, improving the convenience of operation 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 the downtime.

In some embodiments, referring to fig. 1 to 4 together, the pressurizing device 230 includes a wedge assembly 231, a pressurizing member 232 and a communicating pipe 233, wherein the wedge assembly 231 is movably disposed on the valve seat 210 along a direction perpendicular to a side surface of the valve plate 220, the pressurizing member 232 is spaced apart from the wedge assembly 231, a moving direction of the pressurizing member 232 is opposite to the wedge assembly 231, the communicating pipe 233 is disposed through the valve body 110, one end of the communicating pipe 233 is connected to an end of the wedge assembly 231 remote from the valve plate 220, and the other end of the communicating pipe 233 is connected to an end of the pressurizing member 232 remote from the valve plate 220.

It will be appreciated that the wedge assembly 231 is a member capable of moving with the movement of the valve plate 220 after contacting the valve plate 220, the wedge assembly 231 being disposed on one side of the valve seat 210 in a direction perpendicular to the side of the valve plate 220, the wedge assembly 231 having a beveled surface 221 end and a flat surface end, the beveled surface 221 end being directed toward the other side of the valve seat 210, the beveled surface 221 end being adapted to abut against one end of the valve plate 220 and enable the wedge assembly 231 to be urged 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 member urged by the wedge assembly 231 to move toward the valve plate 220 to increase the contact pressure of the valve plate 220 with the valve seat 210, and the pressing member 232 has a contact plane, for example, the pressing member 232 may be a square body or a cylinder body, but is not limited thereto. The communication pipe 233 is a member for transmitting the movement of the wedge assembly 231 to the pressing member 232 by hydraulic pressure, and the communication pipe 233 may be a hard pipe such as an iron pipe, a stainless pipe, or a soft pipe such as a hose of a rubber pipe, but is not limited thereto. The communication pipe 233 may be buried in the valve body 110 or may be inserted through the valve body 110 so that a part of the communication pipe 233 is disposed outside the valve body 110, but is not limited thereto. Both ports of the communication pipe 233 face the valve plate 220, and axes of both ports of the communication pipe 233 are perpendicular to the side face of the valve plate 220. A portion of the wedge assembly 231 is disposed within the communication pipe 233, and the wedge assembly 231 is movable in an axial direction of the communication pipe 233. A portion of the pressurizing member 232 is provided in the communication pipe 233, and the pressurizing member 232 is movable in an axial direction of the communication pipe 233.

So set up, through setting up wedge subassembly 231 movably on disk seat 210 along the direction of perpendicular to the side of valve plate 220, pressing member 232 is movably set up on disk seat 210 along the direction of perpendicular to the side of valve plate 220, with communicating pipe 233 links together wedge subassembly 231 and pressing member 232, and wedge subassembly 231 and pressing member 232 can be along the axis direction of communicating pipe 233, when valve plate 220 moves with gate valve 100 closed, valve plate 220 moves towards wedge subassembly 231 and is in abutment with wedge subassembly 231's inclined plane 221 end, and continue to move so that wedge subassembly 231 moves along the direction of perpendicular to valve plate 220 side, that is, the part of wedge subassembly 231 moves in communicating pipe 233 along the axis direction of communicating pipe 233, and then promote pressing member 232 to move towards valve plate 220, and along with the movement of valve plate 220, the pressure that pressing member 232 produced to valve plate 220 increases gradually, so can change the motion of valve plate 220 into the extra pressure to valve plate 220, effectively improve 100's sealing performance, and when valve plate 220 does not move to be in abutment with wedge subassembly 231, the frequency of extra pressure to valve plate 220 is unfavorable for increasing the valve plate 220, and the service life of gate valve plate 100 is prolonged, and service life is reduced, and service costs are reduced.

In some embodiments, referring to fig. 2 and 3, a first groove 211 is formed on the valve seat 210 along a direction perpendicular to a side surface of the valve plate 220.

The wedge assembly 231 includes a wedge 2311, a closing cylinder 2312 and a pushing member 2313, the wedge 2311 is movably disposed in the first groove 211 in a direction perpendicular to a side surface of the valve plate 220, the closing cylinder 2312 is movably disposed in the first groove 211, an outer wall of the closing cylinder 2312 is in sliding friction with an inner wall of the first groove 211, the closing cylinder 2312 has a through hole space 23121, one end of the pushing member 2313 is connected to one end of the wedge 2311 away from the valve plate 220, the other end of the pushing member 2313 is movably connected to the closing cylinder 2312, the pushing member 2313 is capable of moving in the through hole space 23121 in an axial direction of the closing cylinder 2312, the outer wall of the pushing member 2313 is in sliding friction with the inner wall of the closing cylinder 2312, and at least a part of the pushing member 2313 is located in the through hole space 23121.

It will be appreciated that the first groove 211 is configured to limit the movement direction of the wedge 2311 and accommodate the wedge 2311, the inner side of the first groove 211 is in sliding friction with the outer side of the wedge 2311, and the depth of the first groove 211 is greater than or equal to the sum of the lengths of the wedge 2311 and the closure cylinder 2312, and the wedge 2311 can move to be completely located in the first groove 211. The first groove 211 is lower than the flow path 120 in the height direction of the gate valve 100 so that one end of the valve plate 220 abuts against the wedge 2311 after the valve plate 220 completely intercepts the flow path 120. Wedge 2311 is a component that breaks down pressure received from valve plate 220 into forces in a direction perpendicular to the sides of valve plate 220 by way of inclined surface 221, and wedge 2311 has an end of inclined surface 221 and a planar end. The sealing cylinder 2312 is a member for accommodating a conductive medium and allowing at least a portion of the pushing member 2313 to move inside the sealing cylinder 2312 to push the conductive medium, which may be gas such as air, carbon dioxide, liquid such as water, oil, or solid such as a push rod, solid particles, etc., to transmit force, but is not limited thereto. The inner side wall of the closure tube 2312 is in sliding friction with at least a portion of the outer side surface of the pusher 2313, such that a closed space is formed within the closure tube 2312 and an increased pressure can be generated within the closed space. The through-hole space 23121 is connected to the communication pipe 233. The closed space communicates with the communication pipe 233. The pushing member 2313 is a member for being pushed by the wedge 2311 to move along the axial direction of the closing cylinder 2312, and the outer wall of the pushing member 2313 is in sliding friction with the inner wall of the closing cylinder 2312, so that a closed space is formed by the end of the pushing member 2313 away from the wedge 2311, the inner side surface of the end of the closing cylinder 2312 away from the wedge 2311 and the inner wall of the closing cylinder 2312. The pushing member 2313 may be a cylinder or a square body, but is not limited thereto.

So set up, set up first recess 211 along the direction perpendicular to the side of valve plate 220 on valve holder 210, set up wedge 2311 in first recess 211, the part of wedge 2311 is outstanding in first recess 211, the one end that the wedge 2311 kept away from valve plate 220 is connected in the one end of impeller 2313, the other end of impeller 2313 movably connects in the inside wall of seal tube 2312, seal tube 2312 sets up in first recess 211, in the in-process of gate valve 100 closing, after valve plate 220 is cut off runner 120, valve plate 220 continues to move to the butt and is in contact with wedge 2311, and push wedge 2311 gradually in first recess 211, make impeller 2313 gradually move towards seal tube 2312, gradually compress the enclosure, make the pressure in the enclosure gradually increase, and then make the pressure in the messenger's pressure in the communication pipe 233 gradually increase, the pressure piece 232 that promotes the other end of communication pipe 233 moves towards valve plate 220, gradually increase the contact pressure of valve plate 220 and valve holder 210, in the course of closing gate valve 100 and for being in contact with 2311, do not receive extra pressure between valve plate 220 and the valve holder 210, be favorable to improving the gate valve plate 100 and the frequency of operation, the valve plate 100 has been accepted in the cost is prolonged, the service life of the valve holder is convenient and easy to be used.

In some embodiments, referring to fig. 1 to 3, the gate valve 100 further includes a flow channel 120, the flow channel 120 is opened to the valve body 110 along a direction perpendicular to a side surface of the valve plate 220, and the number of the pressing members 232 is plural, and the plurality of pressing members 232 are uniformly and alternately disposed on the valve seat 210 along a circumferential direction of the flow channel 120.

It is understood that the flow passage 120 is a passage in the valve body 110 for allowing fluid to pass therethrough.

So set up, through evenly and the interval sets up a plurality of pressure applying pieces 232 along the circumference of runner 120, can evenly distribute the pressure of wedge subassembly 231 transmission on valve plate 220, make the contact pressure evenly distributed between valve plate 220 and the disk seat 210, the effectual sealing performance who promotes gate valve 100 reduces the leakage risk to can avoid the uneven friction that receives of valve plate 220 and disk seat 210 to lead to valve plate 220, disk seat 210 to warp, prolong the life-span of gate valve 100, reduce the demand of maintaining.

In some embodiments, referring to fig. 1 to 3, the communication 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 assembly 231 far away from the valve plate 220, the other end of the pipe body 2331 is connected to one end of the pressing member 232 far away from the valve plate 220, the piston 2332 is movably arranged at one end of the pipe body 2331 along the axial direction of the pipe body 2331, the outer side surface of the piston 2332 and the inner side surface of the pipe body 2331 are in sliding friction, a first space 2334 is formed by the other side of the piston 2332, the inner wall of the pipe body 2331 and one side of the pressing member 232 far away from the valve plate 220 together, the limiting portion 2333 is arranged at one end of the pipe body 2331, the limiting portion 2333 protrudes out of the inner side of the pipe body 2331, the limiting portion 2333 is positioned at one side of the piston 2332 far away from the valve plate 220, the limiting portion 2332 is used for limiting the movement of the piston 2332 to the outside the pipe body 2331 along the axial direction of the pipe body 2331, and the pressure medium is filled in the first space 2334.

It will be appreciated that the pipe body 2331 is a member for connecting the wedge assembly 231 and the pressing member 232 and transmitting the force of the wedge assembly 231 to the pressing member 232, and the pipe body 2331 may be a square pipe or a circular pipe, but is not limited thereto. The pipe body 2331 may be entirely buried in the valve seat 210 and the valve body 110, or may be partially inserted outside the valve body 110, but is not limited thereto. The piston 2332 is a member disposed in the pipe body 2331 and capable of moving along the axis of the pipe body 2331, and the outer side surface of the piston 2332 may be provided with an elastic sealing member, such as a rubber sealing ring, or may be provided with a hard sealing member, such as a metal sealing ring, but is not limited thereto. The limiting portion 2333 is a member for limiting the movement of the piston 2332 to the outside of the pipe 2331 along the axis of the pipe 2331, and the limiting portion 2333 may be a block protruding from the inner wall provided at one end of the pipe 2331, or may be a torus provided at one end of the pipe 2331, and the torus has an inner diameter smaller than the outer diameter of the piston 2332, so that the piston 2332 cannot move to the outside of the pipe 2331, but is not limited thereto. The pressure medium is filled in the pipe body 2331, and is an object between the piston 2332 and the pressing member 232, and the pressure medium may be a gas, or may be a liquid or solid which is not compressible or has small compressibility, so as to accurately transmit pressure, for example, the pressure control may be air, water, hydraulic oil or sand, but is not limited thereto.

So set up, wear the valve seat 210 with body 2331, make the one end of body 2331 connect in wedge subassembly 231 keep away from the one end of valve plate 220, the other end of body 2331 connects in the one end that the pressure piece 232 kept away from valve plate 220, set up the piston 2332 that can follow the axis direction of body 2331 in body 2331, in the one side that piston 2332 kept away from wedge subassembly 231, the inner wall of body 2331 and the first space 2334 that one side that pressure piece 232 kept away from valve plate 220 formed jointly, make wedge subassembly 231 move along with the promotion of valve plate 220, wedge subassembly 231 can promote piston 2332 and remove, the removal of piston 2332 is conducted to pressure piece 232 through pressure medium, make pressure piece 232 remove towards valve plate 220 along the axis direction of body 2331, through the pressure that removes wedge subassembly 231 produced into pressure piece 232 and act on valve plate 220, make gate valve 100 realize self-tightening seal, and can be stable, accurately transmit the pressure, the stability and the reliability of gate valve 100 control have been improved, the improvement is with the reliability of valve plate 220, the improvement is with the controllable, the maintenance difficulty of the split type structure of valve plate 220 is easy to maintain.

In some embodiments, referring to fig. 2 to 4, the closed cylinder 2312 includes a cylinder 23122, a moving groove 23123, a first elastic member 23124 and an output hole 23125, wherein the cylinder 23122 is movably disposed in the first groove 211, an outer wall of the cylinder 23122 is in sliding friction with an inner wall of the first groove 211, the moving groove 23123 is disposed in the inner wall of the cylinder 23122 along an axial direction of the cylinder 23122, the first elastic member 23124 is disposed in the moving groove 23123 along the axial direction of the cylinder 23122, one end of the first elastic member 23124 is disposed in the moving groove 23123 at an end far 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 disposed in the cylinder 23122 along a height direction of the valve plate 220, an opening of the output hole 23125 faces to a side far from an inner side of the valve body 110, and the output hole 23125 is capable of moving to be communicated with one end of the communicating pipe 233.

It will be appreciated that the cylinder 23122 is a support structure, and the cylinder 23122 may be a cylinder or a square cylinder, but is not limited thereto. The cylinder 23122 is provided with a plurality of moving grooves 23123 along its own axis, the number of the moving grooves 23123 may be one or two, the two moving grooves 23123 are opposite to each other and spaced apart, or may be a plurality of moving grooves 23123, the plurality of moving grooves 23123 are uniformly and intermittently provided on the cylinder 23122 along the axial direction of its own axis, and the moving grooves 23123 are used for limiting the moving direction of the pushing member 2313 so as to move the pushing member 2313 along the axial direction of the cylinder 23122. The first elastic member 23124 is disposed in the moving groove 23123 along the axial direction of the cylinder 23122, the first elastic member 23124 is configured to push the pushing member 2313 toward the valve plate 220, and when the first elastic member 23124 is not subjected to an external force, the first elastic member 23124 is in an extended state, and at this time, the pressure of the first elastic member 23124 acting on the pushing member 2313 is greater than the friction force between the outer wall of the cylinder 23122 and the inner wall of the first groove 211, and when the valve plate 220 abuts against the wedge 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 may be a copper spring or an air bag, but is not limited thereto. The output hole 23125 is a member for communicating with one end of the communication pipe 233 when the cylinder 23122 moves to abut against the bottom surface of the first recess 211.

The arrangement defines the movement range and the movement direction of the pushing member 2313 through the cylinder 23122, the moving groove 23123 is formed in the cylinder 23122, the elastic member is arranged in the moving groove 23123, so that the pushing member 2313 can return to the position, which is initially positioned at one end of the cylinder 23122 and is close to the valve plate 220, after moving along the axial direction of the cylinder 23122, the output hole 23125 can be connected to the connecting channel through the movement of the cylinder 23122, the space between the pushing member 2313 and the piston 2332 in the connecting channel is reduced, the movement of the pushing member 2313 can be accurately transmitted to the pressing member 232, the sensitivity of controlling the contact pressure between the valve plate 220 and the valve seat 210 is improved, the transmitted pressure is more stable, and the gate valve 100 is effectively easier to operate.

Optionally, the sealing cylinder 2312 further includes a second elastic member, one end of the second elastic member is disposed at one end of the sealing cylinder 2312 far from the valve plate 220, and the other end of the second elastic member is disposed at the bottom surface of the first groove 211.

It is understood that the second elastic member may have the same structure as the first elastic member 23124.

So set up, through setting up second elastic component and first elastic component 23124, when valve plate 220 does not butt with voussoir 2311, seal a section of thick bamboo 2312 can remove under the promotion of second elastic component and keep away from the one end of valve plate 220 and the bottom surface looks interval of first recess 211 to seal a section of thick bamboo 2312, output port 23125 is not linked together with communicating pipe 233, the one end that valve plate 220 was kept away from to the promotion piece 2313 is located the one end that is close to valve plate 220 in a section of thick bamboo 2312, so need not manual operation to voussoir 2311 and seal a section of thick bamboo 2312 reset, can promote the smoothness and the stability of gate valve 100 operation in-process.

In some embodiments, referring to fig. 2 and 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 is communicated with the first groove 211, and the sealing cylinder 2312 is capable of moving to disconnect the communication between the first through hole 212 and the first groove 211.

It is understood that one end of the first through hole 212 is connected to the first groove 211, and the other end is connected to the flow channel 120.

By arranging the first through hole 212 on the valve seat 210, one end of the first hollow is communicated with the first groove 211, the other end of the first hollow is communicated with the flow channel 120, so when the gate valve 100 is opened, fluid in the flow can enter the first groove 211, in the closing process of the gate valve 100, the valve plate 220 is abutted against the wedge 2311 and pushes the wedge 2311 into the first groove 211, the closed cylinder 2312 moves towards the direction far away from the valve plate 220, the communication between the first through hole 212 and the first groove 211 is disconnected, the flow channel 120 and the first space 2334 are isolated, the output hole 23125 is communicated with the communicating pipe 233, the valve plate 220 pushes the wedge 2311 to move so that the pushing piece 2313 moves towards the direction far away from the valve plate 220, the fluid in the closed cylinder 2312 is pushed into the communicating pipe 233, the piston 2332 is pushed to move, the contact pressure between the valve plate 220 and the valve seat 210 is increased, the fluid passing through the gate valve 100 is used as a medium for transmitting pressure, external supplement is not needed, the operation of the gate valve 100 is effectively simplified, the independence of the gate valve 100 is improved, the operation flow of the gate valve is guaranteed, the backflow of the gate valve is avoided, the pressure in the gate valve 100 can be conveniently sealed, and the sealing stability of the flow channel 120 is guaranteed, and the sealing stability of the fluid can be guaranteed.

In some embodiments, referring to fig. 1 to 3, the valve core assembly 200 further includes a pressure relief valve 235, the pressure relief valve 235 is disposed on an outer wall of the valve body 110, an input end of the pressure relief valve 235 is connected to the second space 234, and the pressure relief valve 235 is used for discharging the fluid in the second space 234.

It is understood that the pressure release valve 235 is a component for discharging the object in the second space 234, and the output end of the pressure release valve 235 may face the outside of the valve body 110 or may be connected to the output end of the flow channel 120, but is not limited thereto. The relief valve 235 may be a butterfly valve, a ball valve, or the like 110, but is not limited thereto.

By arranging the relief valve 235 outside the valve body 110, the 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 the gate valve 100 needs to be opened, the fluid in the second space 234 is discharged through the relief valve 235, the piston 2332 in the communicating pipe 233 moves towards the valve plate 220, the pressing piece 232 moves towards the direction away from the valve plate 220, the contact pressure between the valve plate 220 and the valve seat 210 is reduced, the gate valve 100 is opened more easily and quickly, friction between the valve plate 220 and the valve seat 210 is reduced, the service life of the gate valve 100 is effectively prolonged, the convenience of opening and closing the gate valve 100 is improved, and the gate valve 100 is ensured to have stable sealing performance.

In some embodiments, referring to fig. 2 and 3, one end of the valve plate 220 has a bevel 221, and the bevel 221 matches the bevel 221 of the wedge 2311.

Alternatively, one end of valve plate 220 is a cambered surface.

So set up, set up inclined plane 221 or cambered surface at the one end of valve plate 220, reduce the contact pressure between valve plate 220 and the voussoir 2311, avoid gate valve 100 to open and close the in-process jamming, reduce the required dynamics of gate valve 100 operation of opening and close to lengthen the life of voussoir 2311 and valve plate 220.

Referring to fig. 1 to 4, the embodiment of the present application further provides a gate valve 100, where the gate valve 100 includes a valve body 110 and the valve core assembly 200 according to any one of the above embodiments, the valve body 110 has a valve body cavity, and the valve core assembly 200 is disposed in the valve body cavity.

As can be seen from the above, the gate valve 100 provided in the embodiment of the present application, by arranging the pressurizing device 230 on the valve seat 210, when the valve plate 220 moves along the height direction thereof 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, thereby realizing self-tightening sealing, effectively enhancing the sealing effect when the gate valve 100 is closed, dynamically adjusting the contact pressure between the valve plate 220 and the valve seat 210 according to the use requirement, avoiding the constant tight friction between the valve plate 220 and the valve seat 210, improving the convenience of the operation 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 the downtime.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. The valve core assembly is characterized by being applied to a gate valve, wherein the gate valve comprises a valve body, the valve body is provided with a valve body inner cavity, and the valve core assembly comprises:

the valve seat is arranged in the inner cavity of the valve body;

2. The valve cartridge assembly of claim 1, wherein the pressurizing means comprises:

3. The valve cartridge assembly of claim 2, wherein the valve seat is provided with a first groove in a direction perpendicular to a side of the valve plate, and wherein the wedge assembly comprises:

4. The valve core assembly according to claim 2, wherein the valve core assembly further comprises a flow passage, the flow passage is formed in the valve body in a direction perpendicular to the side face of the valve plate, the number of the pressing pieces is multiple, the pressing pieces are uniformly and alternately arranged on the valve seat along the circumferential direction of the flow passage, the number of the communicating pipes is multiple, one ends of the communicating pipes are connected to one end of the wedge-shaped assembly, which is far away from the valve plate, and the other ends of the communicating pipes are connected to one end of the pressing pieces, which is far away from the valve plate, in a one-to-one correspondence manner.

5. The valve cartridge assembly of claim 2, wherein the communication conduit comprises:

and a pressure medium filled in the first space.

6. The valve cartridge assembly of claim 3, wherein the closure cartridge comprises:

7. The valve cartridge assembly of claim 6, wherein an end of the pusher remote from the valve plate, an inner wall of the cylinder, an inner wall of the first groove, and an inner wall of the communication pipe together form a second space;

8. The valve cartridge assembly of claim 3, wherein a first through hole is formed in the valve seat in a height direction of the valve plate, the first through hole is communicated with the first groove, and the closing cylinder is movable to disconnect the communication between the first through hole and the first groove.

9. The valve cartridge assembly of claim 3 wherein said valve plate has a chamfer at one end, said chamfer matching a chamfer of said wedge.

10.A gate valve, comprising:

a valve body having a valve body cavity, and

The valve cartridge assembly of any one of claims 1 to 9 disposed within the valve body interior cavity.