CN213808952U - Wear-resistant shear valve with flushing function - Google Patents

Abstract

The utility model relates to a wear-resisting shear valve with washing function, including the valve body, be equipped with flashboard, activity disk seat and guard plate in the valve body, the flashboard has open position and closed position, and the flashboard is by opening displacement to closed position in-process, and flashboard runner hole forms flashboard runner chamber with the guard plate of both sides. 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 arranged on at least one protection plate, and an oil outlet of the flushing channel forms a flushing port on the inner side surface of the protection plate. 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. The problem of medium coking that exists among the prior art leads to blockking up flashboard flow passage hole and wearing and tearing between guard plate and the flashboard is solved.

Description

Wear-resistant shear valve with flushing function

Technical Field

The utility model relates to a shear valve field, concretely relates to wear-resisting shear valve with washing 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 medium can not enter into sealed cavity. 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wear-resisting shear valve with washing function to the easy coking of the downthehole medium of flashboard runner that exists among the solution prior art leads to blockking up the problem of flashboard and guard plate and the sealed face wearing and tearing of flashboard.

In order to achieve the above object, the utility model discloses a wear-resisting shear valve with washing function adopts following technical scheme: the wear-resistant shear valve with the 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 for communicating the flashboard flow passage hole with the valve body flow passage, the flashboard is also provided with a closing position for plugging the valve body flow passage by the flashboard plugging section, in the process that 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 for flushing medium coking in the flashboard flow passage cavity in the process that 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 oil inlet of the flushing passage is connected with a flushing pipe extending out of the valve body, and an oil outlet of the flushing passage forms a flushing port on the inner side surface of the protective 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.

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 utility model has the advantages 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 flushing feature of 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

The utility model discloses an embodiment of wear-resisting shear valve with washing function, as shown in fig. 1-3, including valve body 1, be provided with flashboard and movable valve seat 2 in the valve body 1, all be provided with guard plate 3 and protection casing 14 in the valve body in the flashboard both sides. 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 (4)

1. Wear-resisting shear valve with washing function, comprising a valve body, be provided with flashboard and activity disk seat in the valve body, all be provided with the guard plate in the flashboard both sides in the valve body, the valve body has the valve body runner, flashboard flow path hole and flashboard shutoff section have set gradually along upper and lower direction on the flashboard, the flashboard has the position of opening of flashboard flow path hole and valve body runner intercommunication, the flashboard still has the closed position of flashboard shutoff section shutoff valve body runner, the flashboard is by opening displacement to closed position in-process, flashboard flow path hole forms flashboard runner chamber with the guard plate of both sides, its characterized in that: the wear-resistant shear valve further comprises a flushing device which is used for flushing medium coking in the flow passage cavity of the flashboard by opening the displacement to the closed position in-process, the flushing device comprises a flushing channel arranged on at least one protection plate, an oil inlet of the flushing channel is connected with a flushing pipe extending out of the valve body, an oil outlet of the flushing channel forms a flushing port on the inner side surface of the protection plate, and the flashboard is communicated with the flow passage cavity of the flashboard to realize flushing by opening the displacement to the closed position in-process.

2. A wear-resistant shear valve with flushing function as claimed in claim 1, wherein: 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.

3. A wear-resistant shear valve with flushing function as claimed in claim 2, characterized in that: 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.

4. A wear-resistant shear valve with flushing function as claimed in claim 3, characterized in that: 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.

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