CN112361005A

CN112361005A - Wear-resisting shear valve with washing function

Info

Publication number: CN112361005A
Application number: CN202011466347.7A
Authority: CN
Inventors: 马祥明; 鲍官祥; 苏杨; 苏正楚; 苏钲超; 苏林波; 孙孝标; 周永清
Original assignee: Shanghai Feiqiu Technology Group Co ltd
Current assignee: Shanghai Feiqiu Technology Group Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-02-12
Anticipated expiration: 2040-12-14
Also published as: CN112361005B

Abstract

The invention relates to a wear-resistant shear valve with flushing function, comprising a valve body, a gate plate, a movable valve seat and a protective plate are arranged in the valve body, the gate plate has an open position and a closed position, and the gate plate is displaced from the open position to the closed position During the process, the gate flow channel hole and the protective plates on both sides form the gate flow channel cavity. The wear-resistant shear valve further includes a flushing device for flushing the coking of the medium in the flow channel cavity of the shutter when the shutter is displaced from the open position to the closed position. The flushing device includes a flushing channel arranged on at least one protective plate, and an oil outlet of the flushing channel forms a flushing port on the inner side of the protective plate. When the gate moves from the open position to the closed position, the flow channel cavity of the gate will be communicated with the flushing port, and the flushing medium in the flushing pipe will flush the coking of the media in the flow channel hole of the gate, and wash away most of the media coking. . It solves the problems in the prior art that the media coking leads to blocking the flow passage hole of the gate and the wear between the protection plate and the gate.

Description

Wear-resisting shear valve with washing function

Technical Field

The invention relates to the field of shear valves, in particular to a wear-resistant shear valve with a flushing function.

Background

At present, a shear valve belongs to a gate valve, and is generally used in a pipeline system under severe working conditions, such as viscous slurry, solid-liquid two-phase suspension and other environments in the use, chemical industry, electric power and environmental protection industries. The structure of shear valve is CN 206496015U's chinese utility model patent as the grant publication number, discloses a governing valve and flashboard thereof, including valve body, flashboard and movable valve seat, the valve body has the valve body runner, and the flashboard has the flashboard runner hole that corresponds with the valve body runner, and the both sides of flashboard all have the sealed face of flashboard, and the valve body is inside to be provided with the guard plate in the flashboard both sides, and the guard plate is sealed the cooperation all the time with flashboard both sides face, and the medium is downthehole at the flashboard runner by the guard plate shutoff of both sides, and. The following disadvantages still exist: can produce the medium coking on the pore wall in flashboard runner hole to and when the flashboard upwards moved to the closed position from the open position, the downthehole medium of flashboard runner can be carried the flashboard runner intracavity of the sealing of constituteing by guard plate and flashboard, and the flashboard runner hole is plugged up to the easy coking of medium in this flashboard runner intracavity, also easily causes guard plate and the sealed face wearing and tearing of flashboard in addition, and the hourglass aggravates in making the valve, thereby influences the life of valve.

Disclosure of Invention

The invention aims to provide a wear-resistant shear valve with a flushing function, and aims to solve the problems that media in a gate plate flow passage hole are easy to coke to block a gate plate and a protection plate and a gate plate sealing surface are abraded in the prior art.

In order to achieve the purpose, the wear-resistant shear valve with the flushing function adopts the following technical scheme: a wear-resistant shear valve with a flushing function comprises a valve body, wherein a flashboard and a movable valve seat are arranged in the valve body, protective plates are arranged on two sides of the flashboard in the valve body, the valve body is provided with a valve body flow passage, a flashboard flow passage hole and a flashboard plugging section are sequentially arranged on the flashboard along the vertical direction, the flashboard is provided with an opening position at which the flashboard flow passage hole is communicated with the valve body flow passage, the flashboard is also provided with a closing position at which the flashboard plugging section plugs the valve body flow passage, the flashboard moves from the opening position to the closing position, the flashboard flow passage hole and the protective plates on two sides form a flashboard flow passage cavity, the wear-resistant shear valve further comprises a flushing device used for flushing medium coking in the flashboard flow passage cavity when the flashboard moves from the opening position to the closing position, the flushing device comprises a flushing passage arranged on at least one protective plate, an, and in the process that the flashboard moves to the closed position from the opening position, the flushing port is communicated with the flashboard flow passage cavity to realize flushing.

The valve body is characterized in that a spring seat is arranged between the axial end part of the movable valve seat and the inner wall of the valve body, a spring seat mounting groove for mounting the spring seat is formed in the inner wall of the valve body, a first sealing structure is arranged between the spring seat and the groove wall of the mounting groove, and an elastic second sealing structure with a compensation function is arranged between the axial end part of the movable valve seat and the corresponding spring seat.

The second sealing structure comprises an annular groove formed in the end face of a spring seat, the spring seat is provided with a central channel communicated with a valve body flow passage, an annular guide wall which is matched with the annular groove in a guide and moving mode is arranged on the axial end face of the movable valve seat, a first spring, a sealing ring which is in top press fit with the annular guide wall and a base plate which is arranged between the first spring and the sealing ring are arranged in the annular groove.

More than two spring mounting holes are formed in the axial end face of the movable valve seat at intervals along the circumferential direction, a second spring is arranged in each spring mounting hole, and the end portion of each second spring is used for being axially pressed against the corresponding spring seat.

The invention has the beneficial effects that: in the process that the flashboard moves to the closed position by opening, the flashboard runner cavity can be communicated with the flushing port, and a flushing medium in the flushing pipe can flush media in the flashboard runner hole to flush most of the media. Meanwhile, when the flashboard is located at the closed position, the flushing port is communicated with the flashboard runner hole, flushing media can enter the flashboard runner cavity to soak media cokes which are not flushed away, and the media cokes on the hole wall are softened and dropped. When the gate is opened next time, the material in the gate runner cavity can flow away along with the flowing medium. The problem of the downthehole medium coking of flashboard runner easily block up flashboard runner hole among the prior art is solved, the problem of the sealed face wearing and tearing of guard plate and flashboard because of medium coking has also been solved simultaneously.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a wear-resistant shear valve with flush functionality according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partially enlarged view at B in fig. 2.

Detailed Description

An embodiment of the wear-resistant shear valve with a flushing function, as shown in fig. 1-3, comprises a valve body 1, wherein a gate plate and a movable valve seat 2 are arranged in the valve body 1, and a protection plate 3 and a protection cover 14 are arranged on two sides of the gate plate in the valve body. The valve body is provided with a valve body flow passage 4, and a flashboard flow passage hole 5 and a flashboard plugging section 6 are sequentially arranged on the flashboard along the up-down direction. The protection plate and the movable valve seat are arranged in a split mode and are in sealing fit connection. The flashboard is provided with an opening position for communicating a flashboard flow passage hole with a valve body flow passage, and the flashboard is also provided with a closing position for plugging the valve body flow passage by a flashboard plugging section. In the process that the flashboard moves from the opening position to the closing position, the flashboard runner hole and the protection plates on the two sides form a flashboard runner cavity.

The wear-resistant shear valve further comprises a flushing device for flushing media coking in the gate flow passage cavity when the gate is displaced from the open position to the closed position. The flushing device comprises a flushing channel 7 arranged on a protection plate, an oil inlet of the flushing channel is connected with a flushing pipe 9 extending out of the valve body, and the flushing pipe is provided with a check valve 10 and a stop valve 11. The oil outlet of the flushing channel forms a flushing opening 8 on the inner side of the shield plate. And in the process that the flashboard moves to the closed position from the opening position, the flushing port is communicated with the flashboard flow passage cavity to realize flushing. In this embodiment, the flushing medium is heat transfer oil.

A spring seat 12 is arranged between the axial end part of the movable valve seat and the inner wall of the valve body in the valve body, and a spring seat mounting groove for mounting the spring seat is formed in the inner wall of the valve body. A first sealing structure 15 is arranged between the spring seat and the groove wall of the mounting groove, the first sealing structure is end face sealed, and the first sealing structure comprises a sealing ring arranged on the circumferential end face of the spring seat. An elastic second sealing structure with a compensation function is arranged between the axial end part of the movable valve seat and the corresponding spring seat. The second seal structure includes a ring groove 16 provided on an end surface of a spring seat having a central passage 13 communicating with the valve body flow passage. The axial end face of the movable valve seat is provided with an annular guide wall 20 which is in guide movable fit with the annular groove. The annular groove is provided with a first spring 17, a sealing ring 18 which is in top press fit with the annular guide wall, and a backing plate 19 which is arranged between the first spring and the sealing ring. The first spring provides pretightening force, and the sealing performance is guaranteed by automatic compensation under the action of the first spring after the sealing ring is abraded. Meanwhile, the sealing ring and the backing plate can prevent the medium from contacting with the first spring, so that the elasticity of the first spring is ensured, and the service life of the valve is prolonged. Four spring mounting holes 21 are formed in the axial end face of the movable valve seat at intervals along the circumferential direction, a second spring 22 is arranged in each spring mounting hole, and the end portion of each second spring is used for being axially pressed against the corresponding spring seat.

When the flushing device is used, the flashboard moves upwards from the opening position to the closing position, the flashboard flow passage cavity is communicated with the flushing port, a flushing medium in the flushing pipe can flush media in the flashboard flow passage hole, and most of the media are flushed. Meanwhile, when the flashboard is located at the closed position, the flushing port is communicated with the flashboard runner hole, the flushing medium can soak media cokes which are not flushed in the flashboard runner cavity, and the media cokes on the hole wall are softened and dropped. When the gate is opened next time, the material in the gate runner cavity can flow away along with the flowing medium.

In other embodiments of the present invention, the number of the spring mounting holes on the movable valve seat can be adjusted according to actual needs, for example, 2 or 3 spring mounting holes are uniformly distributed along the circumferential direction; the guard plate may also be integrally formed with the movable valve seat.

Claims

1. A wear-resistant shear valve with flushing function, comprising a valve body, a gate plate and a movable valve seat are arranged in the valve body, protective plates are arranged on both sides of the gate plate in the valve body, and the valve body has a valve body flow channel, The gate is provided with a gate flow channel hole and a gate blocking section in sequence along the upper and lower directions. The gate has an open position where the gate flow channel hole communicates with the valve body flow channel. In the closed position of the flow channel of the valve body, in the process of the gate plate is displaced from the open position to the closed position, the gate flow channel hole and the protective plates on both sides form the gate flow channel cavity. It is characterized in that: the wear-resistant shear valve also includes a The flushing device is used for flushing the medium coking in the flow channel cavity of the shutter in the process of moving the gate from the open position to the closed position. The flushing pipe extends out of the valve body, the oil outlet of the flushing channel forms a flushing port on the inner side of the protective plate, and the flushing port communicates with the gate flow channel cavity to realize flushing when the gate is displaced from the open position to the closed position.

2. The wear-resistant shear valve with flushing function according to claim 1, wherein a spring seat is arranged inside the valve body between the axial end of the movable valve seat and the inner wall of the valve body, and the valve body is provided with a spring seat. The wall is provided with a spring seat installation groove for the spring seat to be installed, a first sealing structure is provided between the spring seat and the groove wall of the installation groove, and an elastic sealing structure is provided between the axial end of the movable valve seat and the corresponding spring seat. Compensation function of the second sealing structure.

3 . The wear-resistant shear valve with flushing function according to claim 2 , wherein the second sealing structure comprises a ring groove arranged on the end surface of the spring seat, and the spring seat has a flow passage communicating with the valve body. 4 . The central channel, the axial end surface of the movable valve seat is provided with an annular guide wall which is guided and moved with the ring groove, and the ring groove is provided with a first spring, a sealing ring press-fitted with the annular guide wall, and a seal ring arranged on the first spring and the ring groove. Backing plate between sealing rings.

4. The wear-resistant shear valve with flushing function according to claim 3, characterized in that: the axial end face of the movable valve seat is provided with two or more spring mounting holes at intervals along the circumferential direction, and the spring mounting holes are A second spring is arranged in the hole, and the end of the second spring is used for axially pressing against the spring seat.