CN218494230U

CN218494230U - Pneumatic high-pressure flat gate valve

Info

Publication number: CN218494230U
Application number: CN202222854556.XU
Authority: CN
Inventors: 杨刚; 李家慧; 周渝钦
Original assignee: Zhejiang Pariworld Automation Meter Co ltd
Current assignee: Zhejiang Pariworld Automation Meter Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-02-17
Anticipated expiration: 2032-10-26

Abstract

The utility model discloses a pneumatic high-pressure plate gate valve, which comprises a valve body, the valve gap, be provided with combined sealing member between valve body and the valve gap, combined sealing member includes the sealing cover, sealing ring and clamping ring, valve gap and valve body are close to one side inner wall each other and have seted up first spacing step and second spacing step respectively, clamping ring and sealing cover keep away from a side each other respectively with first spacing step and the cooperation of second spacing step, the sealing ring presss from both sides and locates between sealing cover and clamping ring and the sealing ring outer wall radially outwards extend and the extension part exceeds sealing cover and clamping ring, the valve body inner wall corresponds the sealing ring position and is provided with third spacing step, after valve body and valve gap closure and through the bolt tightening, gland, sealing cover, sealing ring respectively with first spacing step, second spacing step, third spacing step looks butt; the utility model discloses it is sealed reliable and stable, more the modularization.

Description

Pneumatic high-pressure flat gate valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a pneumatic high-pressure plate valve.

Background

The gate valve is an opening and closing member gate plate, the moving direction of the gate plate is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed.

Through the retrieval, patent CNCN209925655U discloses a pneumatic shutoff gate valve, including valve body, valve gap, valve rod and valve plate, be located the valve gap top is equipped with the cylinder, is equipped with the mount between valve gap and the cylinder, rotates on the mount and is provided with the conversion piece, is equipped with the driving piece on the mount, is equipped with the linkage subassembly that makes its both linkages between driving piece and the conversion piece, rotates on the valve rod to be equipped with can with valve rod threaded connection's screw, be equipped with the drive assembly that drive screw meshing valve rod or break away from the valve rod between screw and the conversion piece, when drive assembly drive screw meshing valve rod, be equipped with the locking piece that makes its both linkages between conversion piece and the screw.

In the above patent: the valve cover and the valve body are screwed up through the double-end stud and the nut, the screwing degree of the nut ensures the sealing effect, only one sealing surface is formed between the valve cover and the valve body, the fitting degree between the valve cover and the valve body and the screwing degree of the nut determine the sealing effect, the sealing performance is still required to be improved, and the flat gate valve with multiple sealing surfaces to improve the sealing performance is designed based on the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a pneumatic high pressure plate valve.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a pneumatic high-pressure plate gate valve, includes the valve body, set up valve gap on the valve body, set up pneumatic actuator on the valve gap, set up in the valve body and with the valve rod that pneumatic actuator is connected, set up in the valve plate of valve rod tip, thereby the valve plate goes up and down to open and close the valve body runner under pneumatic actuator's drive, be provided with combined type sealing member between valve body and the valve gap, combined type sealing member is including sealed lid, sealing ring and clamping ring, the sealing ring adopts graphite material to make, first spacing step and the spacing step of second have been seted up respectively to valve gap and valve body inner wall near one side each other, clamping ring and sealed lid keep away from a side each other respectively with the spacing step cooperation of first spacing step and second, the sealing ring presss from both sides and locates between sealed lid and clamping ring and the radial outside extension of sealing ring outer wall and extension and surpasss sealed lid and clamping ring, the valve body inner wall corresponds the sealing ring position and is provided with the spacing step of third, after valve body and valve gap are closed and tighten through the bolt, gland, sealing ring respectively with first spacing step, the spacing step of second, the third.

As a preferred technical scheme of the utility model, terminal surface is provided with the ring channel under the clamping ring, sealed upper end face and ring channel inner wall butt of covering, sealed lid outer wall is provided with the conical surface, sealed lid lower extreme is offered and is used for with conical surface complex taper hole.

As a preferred technical scheme of the utility model, clamping ring, sealing ring and the sealed three assembly back of lid form the installation cavity in the sealing ring inner circle, sealed lid top is provided with the screw rod and the screw rod tip that run through the clamping ring top and is provided with lock nut.

As an optimal technical scheme of the utility model, the partial cover that the screw rod is located the installation intracavity is equipped with the bellows, the bellows pressurized is between clamping ring and sealed lid.

As a preferred technical scheme of the utility model, the valve rod runs through sealed lid and is connected with pneumatic actuator, the sealed upper end face that covers is provided with the stuffing box, be provided with the packing in the stuffing box and be used for the gland that compresses tightly the packing.

To sum up, the beneficial effects of the utility model are that: when carrying out valve gap and valve body assembly work, pack into the valve body with sealed lid top-down, the periphery and the spacing step butt of second of sealed lid, locate sealed lid with the sealing ring cover of graphite material afterwards, until the periphery and the spacing step butt of third of sealing ring, pack into sealed lid with clamping ring top-down at last until terminal surface and sealing ring butt under the clamping ring, locking valve gap makes the clamping ring at last, the sealing ring, sealed three of lid is sealed to be cooperated, and form between valve body and the valve gap and form a plurality of sealed fitting surfaces (first spacing step, the spacing step of second and the spacing step position department of third), fluid can not leak from valve body and valve gap seal easily like this, sealing performance is good.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

fig. 2 is an enlarged view of a portion a of fig. 1.

Reference numerals: 1. a valve body; 2. a valve cover; 3. a pneumatic actuator; 4. a valve stem; 5. a valve plate; 6. a combination seal; 7. a sealing cover; 8. a seal ring; 9. pressing a ring; 10. a first limit step; 11. a second limit step; 12. a third limiting step; 13. an annular groove; 14. a conical surface; 15. a conical bore; 16. a mounting cavity; 17. a screw; 18. locking the nut; 19. a bellows; 20. a stuffing box; 21. a filler; 22. and (4) a packing gland.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the embodiment, those skilled in the art can obtain other embodiments without making creative efforts, and all of them belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the pneumatic high-pressure flat gate valve includes a valve body 1, a valve bonnet 2 disposed on the valve body 1, a pneumatic actuator 3 disposed on the valve bonnet 2, a valve rod 4 disposed in the valve body 1 and connected to the pneumatic actuator 3, and a valve plate 5 disposed at an end of the valve rod 4, the valve plate 5 is driven by the pneumatic actuator 3 to lift to open and close a flow channel of the valve body 1, a combined sealing element 6 is disposed between the valve body 1 and the valve bonnet 2, the combined sealing element 6 includes a sealing cover 7, a sealing ring 8 and a pressing ring 9, the sealing ring 8 is made of graphite material, a first limiting step 10 and a second limiting step 11 are disposed on inner walls of one side of the valve bonnet 2 and the valve body 1, the pressing ring 9 and the sealing cover 7 are away from each other, a side of the pressing ring 7 is engaged with the first limiting step 10 and the second limiting step 11, the pressing ring 8 is disposed between the sealing cover 7 and the sealing ring 9, an outer wall of the sealing ring 8 extends radially outward and the extending portion of the pressing ring exceeds the first limiting step 7 and the second limiting step 9, a position of the inner wall of the sealing ring 8 is disposed on a position corresponding to the sealing ring 8, when the valve body 1 and the valve bonnet 2 are closed and screwed by bolts, the valve body 1 and the sealing cover are pressed, the sealing cover, the sealing ring 8 are abutted against the single cylinder 3, and the single cylinder is disposed on the single cylinder, and the single cylinder.

When the valve cover 2 and the valve body 1 are assembled, the sealing cover 7 is installed in the valve body 1 from top to bottom, the bottom outer ring part of the sealing cover 7 is abutted to the second limiting step 11, then the sealing cover 7 is sleeved with the sealing ring 8 made of graphite until the periphery of the sealing ring 8 is abutted to the third limiting step 12, finally the pressing ring 9 is installed in the sealing cover 7 from top to bottom until the lower end face of the pressing ring 9 is abutted to the sealing ring 8, finally the valve cover 2 is locked to enable the pressing ring 9, the sealing ring 8 and the sealing cover 7 to be in sealing fit, a plurality of sealing matching surfaces (the first limiting step 10, the second limiting step 11 and the third limiting step 12) are formed between the valve body 1 and the valve cover 2, and therefore fluid cannot easily leak from the sealing position of the valve body 1 and the valve cover 2, and the sealing performance is good.

The lower end face of the pressing ring 9 is provided with an annular groove 13, the upper end face of the sealing cover 7 is abutted against the inner wall of the annular groove 13, the outer wall of the sealing cover 7 is provided with a conical surface 14, the lower end of the sealing cover 7 is provided with a conical hole 15 matched with the conical surface 14, and by adopting the structure, the sealing ring 8 is firmly installed between the sealing cover 7 and the pressing ring 9.

The assembly of clamping ring 9, sealing ring 8 and sealed 7 three back in 8 inner circles of sealing ring formation installation cavity 16, sealed 7 tops of covering are provided with the screw rod 17 and the screw rod 17 tip that run through the clamping ring 9 top and are provided with lock nut 18, fix clamping ring 9, sealing ring 8 and sealed 7 three of covering through screw rod 17 and nut, the follow-up installation of being convenient for, modularization more.

The part of the screw 17, which is positioned in the mounting cavity 16, is sleeved with a corrugated pipe 19, and the corrugated pipe 19 is pressed between the pressing ring 9 and the sealing cover 7, so that the pressing ring 9 and the sealing cover 7 are guaranteed to tightly push the valve body 1 and the valve cover 2 under the action of the corrugated pipe 19 after assembly.

The valve rod 4 penetrates through the sealing cover 7 and is connected with the pneumatic actuator 3, the upper end face of the sealing cover 7 is provided with a stuffing box 20, and a stuffing 21 and a stuffing cover 22 for compressing the stuffing 21 are arranged in the stuffing box 20.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and not intended to limit the present invention, and that there may be various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a pneumatic high-pressure plate gate valve, includes the valve body, set up valve gap on the valve body, set up pneumatic actuator on the valve gap, set up in the valve body and with the valve rod that pneumatic actuator is connected, set up in the valve plate of valve rod tip, thereby the valve plate goes up and down to open and close valve body runner, its characterized in that under pneumatic actuator's drive: be provided with combined type sealing member between valve body and the valve gap, combined type sealing member is including sealed lid, sealing ring and clamping ring, the sealing ring adopts graphite material to make, first spacing step and the spacing step of second have been seted up respectively to valve gap and valve body near one side inner wall each other, clamping ring and sealed lid keep away from a side each other respectively with the cooperation of first spacing step and the spacing step of second, the sealing ring clamp is located between sealed lid and the clamping ring and the radial outside extension of sealing ring outer wall just extend the sealed lid and clamping ring, the valve body inner wall corresponds the sealing ring position and is provided with the spacing step of third, after valve body and valve gap are closed and tighten through the bolt, clamping ring, sealed lid, sealing ring respectively with first spacing step, the spacing step of second, the spacing step looks butt of third.

2. The pneumatic high-pressure plate gate valve of claim 1, wherein: the lower end face of the compression ring is provided with an annular groove, the upper end face of the sealing cover is abutted to the inner wall of the annular groove, the outer wall of the sealing cover is provided with a conical surface, and the lower end of the sealing cover is provided with a conical hole matched with the conical surface.

3. The pneumatic high-pressure plate gate valve of claim 2, wherein: the clamping ring, the sealing ring and the sealing cover are assembled to form an installation cavity in an inner ring of the sealing ring, the top of the sealing cover is provided with a screw penetrating through the top of the clamping ring, and the end of the screw is provided with a locking nut.

4. The pneumatic high-pressure plate gate valve of claim 3, wherein: the part cover that the screw rod is located the installation intracavity is equipped with the bellows, the bellows pressurized is between clamping ring and sealed lid.

5. The pneumatic high-pressure plate gate valve of claim 1, wherein: the valve rod penetrates through the sealing cover and is connected with the pneumatic actuating mechanism, a stuffing box is arranged on the upper end face of the sealing cover, and stuffing and a stuffing cover for compressing the stuffing are arranged in the stuffing box.