CN217874263U - Two-way sealed gate valve - Google Patents

Abstract

The utility model discloses a two way seal's gate valve, its technical scheme main points are including the valve body, alternate the valve rod in the valve body, be located the valve body and the supporter that links to each other with the valve rod, be located the spring in the supporter, install respectively in the left plate body and the right plate body at supporter both ends, all be provided with the ceramic crown plate on left side plate body and the right plate body, be provided with two disk seats that push up with two ceramic crown plates respectively in the valve body, set up on the inner wall of valve body and left plate body laminating with coaxial and the internal diameter of ceramic crown plate and be greater than the annular that slides of ceramic crown plate external diameter, be provided with the sealing ring in the annular that slides and push the thrust spring of left plate body with the sealing ring to, outside the annular that slides is stretched out to the sealing ring part, the terminal surface outward flange of left plate body and valve body laminating is provided with the inclined plane that can slide with the sealing ring, the problem that prior art can not two way seal and leak has been solved.

Description

Two-way sealed gate valve

Technical Field

The utility model relates to a gate valve field, more specifically the utility model relates to a two way seal's gate valve that says so.

Background

The opening and closing part of the gate valve is a 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. In order to adapt to severe working conditions, in recent years, the gate plate and the valve seat are both made of ceramic materials, so that the gate plate and the valve seat have better performances of chemical corrosion resistance, wear resistance, high temperature resistance, scouring resistance and the like, and the gate valve is called as a ceramic gate valve. The existing pneumatic ceramic double-gate valve mainly comprises a cylinder, a valve body, a valve rod, a double-sided ceramic gate plate assembly, a left ceramic valve seat and a right ceramic valve seat, wherein the double-sided ceramic gate plate assembly comprises a left plate body, a right plate body and a ceramic ring plate, the ceramic ring plates are embedded on the outer end faces of the left plate body and the right plate body, the ceramic ring plates on two sides of the double-sided ceramic gate plate assembly respectively correspond to the left ceramic valve seat and the right ceramic valve seat, the left plate body and the right plate body are installed on a support body, the support body is provided with a center hole, a spring is arranged in the center hole, when the pneumatic ceramic double-gate valve is used, the spring respectively pushes the left plate body and the right plate body to the valve body, the two ceramic ring plates respectively push against the left ceramic valve seat and the right ceramic valve seat to realize bidirectional sealing, and the defects still exist, one of the pneumatic ceramic double-gate valve is characterized in that when the valve is in a closed state, the left plate body is connected with a pipeline into which a medium flows, the blocked medium fills the pipeline and can apply thrust to the left plate body, if the thrust force is greater than the elastic force of the spring, the thrust, the left plate body can be pushed to separate the ceramic ring plate body on the left plate body, and the same position between the valve body, so that a gap can not be leaked from the left ceramic ring plate seat, and the left ceramic valve seat, and the gap can be separated from the same position between the valve seat, and the valve seat can not be sealed in the valve body, and the gap can be realized; it is two, the thrust size changes because of the pressure in the medium, and the spring performance that leads to chooseing for use requires differently, if adopt the big spring of elastic coefficient to make the medium can't promote the left plate body, then drive the supporter at the valve rod and reciprocate the in-process, the left plate body and right plate body all the time with valve body inner wall laminating friction, the required power grow of actuating mechanism causes unnecessary energy loss, the left plate body, right plate body and valve body all can wear and tear seriously and lead to life to shorten simultaneously.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a possess good two-way leakproofness and be convenient for driven gate valve.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a two way seal's gate valve, includes the valve body, alternates in the valve body the valve rod, be located the valve body and the supporter that links to each other with the valve rod, be located the spring in the supporter, install respectively in the left plate body and the right plate body at supporter both ends, all be provided with the ceramic ring board on left side plate body and the right plate body, be provided with two disk seats that push up respectively with two ceramic ring boards in the valve body, set up on the inner wall of valve body and left plate body laminating with the coaxial and the internal diameter of ceramic ring board and be greater than the annular that slides of ceramic ring board external diameter, it is provided with the sealing ring in the annular that slides and pushes the thrust spring of sealing ring to left plate body, outside the annular that slides is stretched out to the sealing ring part, the terminal surface outward flange of left side plate body and valve body laminating is provided with the inclined plane that can slide with the sealing ring.

As a further improvement, the outer edge of the sealing ring facing the left plate end face forms a slip surface capable of moving relative to the inclined plane through a chamfer.

As a further improvement, the sealing ring is provided with the sealed face that can laminate with the inclined plane towards the inward flange of left plate body terminal surface.

As a further improvement, the sealing ring is provided with an arc surface connecting the sliding surface and the sealing surface together on the end surface of the left plate body.

As a further improvement, the sliding ring groove is internally provided with a sealing ring which can be laminated with the inner wall of the sealing ring.

The utility model has the advantages that: offer the annular that slides on the inner wall of valve body, set gradually thrust spring and sealing ring in the annular that slides, the outward flange of left plate body forms annular inclined plane through the scarf, push the sealing ring to the inclined plane that left plate body is through thrust spring and sealing ring and remain the laminating throughout, so the design is compared prior art and has been compensatied left plate body and has been promoted and lead to the defect that the valve body only can one-way seal, utilizes thrust spring to push the sealing ring to left plate body and makes and remain sealed all the time between sealing ring and the left plate body, has realized the utility model discloses a two-way seal has avoided the phenomenon that the medium leaked from other positions of valve body, has improved the leakproofness of valve body.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is an enlarged view of a point a in fig. 1.

Reference numerals: 1. a valve body; 2. a valve stem; 3. a support body; 4. a spring; 5. a left plate body; 6. a right plate body; 7. a ceramic ring plate; 8. a valve seat; 9. sliding the ring groove; 10. a seal ring; 11. a reasoning spring; 12. a bevel; 13. a slip surface; 14. a sealing surface; 15. a circular arc surface; 16. and (5) sealing rings.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 2, the gate valve with two-way sealing of this embodiment includes a valve body 1, a valve rod 2 inserted into the valve body 1, a support body 3 located in the valve body 1 and connected to the valve rod 2, a spring 4 located in the support body 3, and a left plate body 5 and a right plate body 6 respectively installed at two ends of the support body 3, wherein ceramic ring plates 7 are respectively disposed on the left plate body 5 and the right plate body 6, and two valve seats 8 respectively contacting with the two ceramic ring plates 7 are disposed in the valve body 1;

based on the prior art, a sliding ring groove 9 which is coaxial with the ceramic ring plate 7 and has an inner diameter larger than the outer diameter of the ceramic ring plate 7 is formed in the inner wall of the valve body 1, the reasoning spring 11 and the sealing ring 10 are sequentially placed in the sliding ring groove 9, a limiting ring with a thickness smaller than that of the sealing ring 10 is arranged on the outer ring wall of the sealing ring 10, an end cover which can allow the sealing ring 10 to locally penetrate out is positioned on the inner wall of the valve body 1 in a bolt fastening mode, the limiting ring is limited in the sliding ring groove 9 by the end cover, the outer edge of the end face of the left plate body 5, which is attached to the valve body 1, is obliquely cut to form an inclined plane 12 capable of sliding with the sealing ring 10, and the maximum distance from the inclined plane 12 to the inner wall of the valve body 1 is greater than the length of the sealing ring 10 extending out of the sliding ring groove 9;

in an initial state, the valve body 1 is in a circulation state, the support body 3 is positioned above the flow channel, the thrust spring 11 pushes the sealing ring 10 to the outside of the sliding ring groove 9, a limit ring on the sealing ring 10 is in top contact with an end cover, part of the sealing ring 10 is positioned in the valve body 1, the valve rod 2 pushes the support body 3 to move downwards in the closing process of the valve body 1, the left plate body 5 and the right plate body 6 both move downwards, the inclined surface 12 below the left plate body 5 and the end part of the sealing ring 10 positioned outside the sliding ring groove 9 slide relatively, the sealing ring 10 gradually retreats into the sliding ring groove 9, the thrust spring 11 is compressed, then the end surface of the sealing ring 10 and the end surface of the left plate body 5 move relatively until the sealing ring 10 and the inclined surface 12 above the left plate body 5 are in top contact, the left plate body 5 continues to move downwards, the sealing ring 10 is gradually pushed outwards by the thrust spring 11, the sealing ring 10 and the inclined surface 12 above the left plate body 5 always keep in a top contact state, after the left plate body 5 moves in place, the end surface of the sealing ring 10 and the left plate body 5 are fully attached to the left plate body 5, the left plate body 5 under the action of a medium, the deformation of the sealing ring 4, and the thrust spring push the sealing ring 10 to continue to be attached to the left inclined surface 12 all the left plate body 5;

so the design is compared prior art and has been compensatied left plate body 5 and promoted and lead to valve body 1 only can one-way sealed defect, utilizes thrust spring 11 to push sealing ring 10 to left plate body 5 and makes and remain throughout sealed between sealing ring 10 and the left plate body 5, has realized the utility model discloses a two-way seal has avoided the phenomenon that the medium leaked from other positions of valve body 1, has improved valve body 1's leakproofness.

As a specific embodiment of the improvement, referring to fig. 2, an outer edge of the sealing ring 10 facing the end surface of the left plate 5 is chamfered to form a sliding surface 13 capable of moving relative to the inclined surface 12, the sliding surface 13 is an arc surface or a chamfered surface with the same slope as the inclined surface 12, and compared with the design in which the sliding surface is slid relative to the inclined surface 12, the design in which the edge of the sealing ring 10 slides relative to the inclined surface 12 replaces the linear-surface contact with the surface-surface contact, so that the degree of abrasion of the inclined surface 12 is reduced, and the stability of the left plate 5 and the sealing ring 10 during the sliding process is improved.

As an improved specific embodiment, referring to fig. 2, the inner edge of the sealing ring 10 facing the end surface of the left plate 5 is chamfered along the radial direction thereof with a sealing surface 14 capable of being attached to the inclined surface 12, after the left plate 5 is moved to a certain position, the sealing ring 10 is contacted against the left plate 5 under the action of the thrust spring 11, and the sealing surface 14 is attached to the inclined surface 12 to form a hard seal.

As a specific embodiment of the improvement, referring to fig. 2, an end surface of the sealing ring 10 facing the left plate 5 is provided with an arc surface 15 for joining the sliding surface 13 and the sealing surface 14 together, and the design of the arc surface 15 makes the joint of the sliding surface 13 and the sealing surface 14 round and smooth, reduces the friction force when the end surface of the left plate 5 and the sealing ring 10 slide relatively, and facilitates the up-and-down movement of the left plate 5.

As a modified specific embodiment, referring to fig. 2, a sealing ring 16 capable of adhering to the inner wall of the sealing ring 10 is disposed in the sliding ring groove 9, so that the medium is prevented from flowing into the chamber where the support body 3 is located from the gap between the sealing ring 10 and the sliding ring groove 8, and the sealing performance between the sealing ring 10 and the valve body 1 is improved.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. The utility model provides a two way seal's gate valve, includes valve body (1), alternates valve rod (2) in valve body (1), be located valve body (1) and supporter (3) continuous with valve rod (2), be located spring (4) of supporter (3), install respectively in left plate body (5) and right plate body (6) at supporter (3) both ends, all be provided with ceramic crown plate (7) on left side plate body (5) and right plate body (6), be provided with two disk seats (8) that touch with two ceramic crown plate (7) tops respectively in valve body (1), its characterized in that: offer on the inner wall of valve body (1) and left plate body (5) laminating with ceramic ring board (7) coaxial and the internal diameter be greater than the annular (9) that slides of ceramic ring board (7) external diameter, be provided with sealing ring (10) in annular (9) that slides and push thrust spring (11) to left plate body (5) with sealing ring (10), outside sealing ring (10) local stretching out annular (9) that slides, the terminal surface outward flange of left side plate body (5) and valve body (1) laminating is provided with inclined plane (12) that can slide with sealing ring (10).

2. The gate valve of claim 1, wherein: the outer edge of the sealing ring (10) facing the end face of the left plate body (5) is chamfered to form a sliding surface (13) capable of moving relative to the inclined surface (12).

3. A gate valve for a bi-directional seal as claimed in claim 2, wherein: the inner edge of the sealing ring (10) facing the end face of the left plate body (5) is provided with a sealing surface (14) which can be attached to the inclined surface (12).

4. A gate valve for a bi-directional seal as claimed in claim 3, wherein: and an arc surface (15) for connecting the sliding surface (13) and the sealing surface (14) together is arranged on the end surface of the sealing ring (10) facing the left plate body (5).

5. A gate valve with bidirectional sealing according to claim 1, 2, 3 or 4, characterized in that: and a sealing ring (16) which can be attached to the inner wall of the sealing ring (10) is arranged in the sliding annular groove (9).

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