CN210440604U

CN210440604U - Soft and hard dual seal seat plate valve

Info

Publication number: CN210440604U
Application number: CN201921350860.2U
Authority: CN
Inventors: 王成华; 王承荣; 邵迎春
Original assignee: Anhui Tianma Pump Valve Group Co ltd
Current assignee: Anhui Tianma Pump Valve Group Co ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-01
Anticipated expiration: 2029-08-20

Abstract

The utility model belongs to the technical field of flat gate valves, in particular to a soft and hard double seal seat flat gate valve, which comprises a valve body, a valve cover, a valve rod and a gate plate, wherein the bottom end of the valve rod is rotatably connected with the top end of the gate plate, and valve seat components are arranged on both sides of the gate plate; the valve seat assembly mainly comprises a rear valve seat and a front valve seat, the rear valve seat is arranged on the inner side wall of the valve body and is annular, the front valve seat is arranged on one side, close to the flashboard, of the rear valve seat, and the front valve seat is installed in the rear valve seat; preceding disk seat is close to one side of back disk seat and has set firmly horizontal connecting rod, the spread groove that corresponds with the connecting rod is seted up on back disk seat surface, the connecting rod is located the spread groove, be provided with coupling spring in the spread groove, overcome prior art's not enough, adopt soft or hard dual seal, overcome the shortcoming of sealing material separately, reduced soft sealing material's loss, improved the leakproofness of valve body, reduced use cost.

Description

Soft and hard dual seal seat plate valve

Technical Field

The utility model belongs to the technical field of the plate valve, concretely relates to soft or hard dual seal seat plate valve.

Background

A flat gate valve is a sliding valve whose closing member is a parallel gate plate. The closing member can be a single gate or a double gate with a spreader mechanism in between. The pressing force of the shutter against the valve seat is controlled by the pressure of the medium acting on the floating shutter or the floating valve seat. The flat gate valve can be divided into a manual flat gate valve, a pneumatic flat gate valve and an electric flat gate valve according to a driving mode, and can be divided into a flat gate valve with a diversion hole, a flat gate valve without a diversion hole, an oil field flat gate valve, a pipeline flat gate valve, a gas flat gate valve and the like according to purposes and use occasions.

The existing flat gate valve is divided into soft sealing and hard sealing, soft sealing materials generally adopt flexible elastic materials such as plastics, rubber and the like, the sealing performance is good, and zero leakage can be achieved. But is easy to wear and has large consumption. The hard sealing material is generally steel, stainless steel, cast iron and the like, has relatively poor sealing performance, but can be suitable for severe working conditions. How to overcome the defects of the soft and hard sealing materials and improve the utilization rate of the materials to the maximum degree becomes a problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a soft or hard dual seal seat plate valve has overcome the not enough of prior art, adopts soft or hard dual seal, has overcome the shortcoming of sealing material separately, has reduced soft sealing material's loss, has improved the leakproofness of valve body, has reduceed use cost.

In order to solve the above problems, the utility model adopts the following technical proposal:

a soft and hard double-seal seat flat gate valve comprises a valve body, a valve cover, a valve rod and a gate plate, wherein the bottom end of the valve rod is rotatably connected with the top end of the gate plate, and valve seat assemblies are arranged on two sides of the gate plate; the valve seat assembly mainly comprises a rear valve seat and a front valve seat, the rear valve seat is arranged on the inner side wall of the valve body and is annular, the front valve seat is arranged on one side, close to the flashboard, of the rear valve seat, and the front valve seat is installed in the rear valve seat; a transverse connecting rod is fixedly arranged on one side, close to the rear valve seat, of the front valve seat, a connecting groove corresponding to the connecting rod is formed in the surface of the rear valve seat, the connecting rod is located in the connecting groove, a connecting spring is arranged in the connecting groove, and two ends of the connecting spring are fixedly connected with the inner side wall of the connecting groove and the connecting rod respectively; preceding disk seat is close to the one end of flashboard and installs and have elastic soft sealing member, the both sides of soft sealing member are provided with hard sealing member, soft sealing member and hard sealing member all laminate closely with the flashboard surface.

Further, the soft seal includes, but is not limited to, an EPDM seal ring and the hard seal includes, but is not limited to, a weld overlay stainless steel, a steel alloy, a copper alloy, or a cobalt chromium tungsten hard alloy layer.

Furthermore, be provided with between back disk seat and the preceding disk seat and have elastic connecting piece, the connecting piece is the rubber material.

Further, the connecting rod is provided with two sets of, two sets of the connecting rod is located the both sides of connecting piece respectively.

Furthermore, a wavy positioning ring is arranged at the joint of the top end of the front valve seat and the rear valve seat, and the positioning ring is embedded on the surface of the front valve seat.

Further, two sets of annular seal grooves are seted up to the one end that back disk seat is close to the valve body, be provided with the resilience formula PEEK sealing washer in the seal groove.

Compared with the prior art, the utility model, following beneficial effect has:

the soft and hard double seal seat flat gate valve of the utility model reduces the loss of sealing materials, prolongs the service cycle of the gate valve and reduces the maintenance cost by arranging the soft sealing element and the hard sealing element; through setting up back disk seat, preceding disk seat, seal groove, connecting piece, coupling spring, connecting rod, spread groove and solid fixed ring, improve the leakproofness of preceding disk seat and back disk seat.

The utility model discloses simple structure, design science is rigorous, adopts soft or hard dual seal, has overcome the shortcoming of sealing material separately, has reduced soft sealing material's loss, has improved the leakproofness of valve body, has reduceed use cost.

Drawings

Fig. 1 is a schematic structural view of a soft and hard double seal seat flat gate valve.

Fig. 2 is a schematic structural diagram of a valve seat assembly in a soft and hard double seal seat flat gate valve.

In the figure: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. a shutter plate; 5. a rear valve seat; 6. a front valve seat; 7. a sealing groove; 8. a connecting member; 9. a connecting spring; 10. a connecting rod; 11. connecting grooves; 12. a soft seal; 13. a hard seal; 14. and (4) fixing the ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in the figures, the soft and hard double seal seat flat gate valve of the utility model comprises a valve body 1, a valve cover 2, a valve rod 3 and a gate plate 4, wherein the bottom end of the valve rod 3 is rotatably connected with the top end of the gate plate 4, and valve seat assemblies are arranged on both sides of the gate plate 4; the valve seat assembly mainly comprises a rear valve seat 5 and a front valve seat 6, the rear valve seat 5 is arranged on the inner side wall of the valve body 1, the rear valve seat 5 is annular, the front valve seat 6 is arranged on one side, close to the flashboard 4, of the rear valve seat 5, and the front valve seat 6 is installed in the rear valve seat 5; a transverse connecting rod 10 is fixedly arranged on one side, close to the rear valve seat 5, of the front valve seat 6, a connecting groove 11 corresponding to the connecting rod 10 is formed in the surface of the rear valve seat 5, the connecting rod 10 is located in the connecting groove 11, a connecting spring 9 is arranged in the connecting groove 11, and two ends of the connecting spring 9 are fixedly connected with the inner side wall of the connecting groove 11 and the connecting rod 10 respectively; the front valve seat 6 is provided with a soft sealing element 12 with elasticity at one end close to the flashboard 4, hard sealing elements 13 are arranged at two sides of the soft sealing element 12, and the soft sealing element 12 and the hard sealing element 13 are both tightly attached to the surface of the flashboard 4.

The soft sealing part 12 includes but is not limited to an EPDM sealing ring, and the hard sealing part 13 includes but is not limited to a stainless steel, alloy steel, copper alloy or cobalt chromium tungsten hard alloy layer which are welded together, and the soft and hard combination improves the sealing performance of the gate valve.

Be provided with between back disk seat 5 and the preceding disk seat 6 and have elastic connecting piece 8, connecting piece 8 is the rubber material, improves the leakproofness between back disk seat 5 and the preceding disk seat 6.

The connecting rods 10 are provided with two groups, and the two groups of connecting rods 10 are respectively positioned at two sides of the connecting piece 8, so that the rear valve seat 5 and the front valve seat 6 are connected more tightly.

The top of preceding disk seat 6 is provided with wavy holding ring with the 5 junctions of back disk seat, and the holding ring is inlayed on preceding disk seat 6's surface, and is easy to assemble the location.

Two sets of annular seal grooves 7 have been seted up to the one end that back disk seat 5 is close to valve body 1, are provided with the resilience formula PEEK sealing washer in the seal groove 7, improve the leakproofness between the inside wall of back disk seat 5 and valve body 1.

To sum up, in the soft and hard dual seal seat flat gate valve of the present invention, when in use, the gate plate 4 is in surface contact with the soft sealing element 12, under the pressure of the fluid medium, the front valve seat 6 moves towards the direction of the gate plate 4, the soft sealing element 12 with elasticity is extruded, the soft sealing element 12 is in close contact with the gate plate 4, the soft sealing element 12 is slightly deformed, and at this time, the surface of the gate plate 4 is in surface contact with the surface of the hard sealing element 13, so as to form soft and hard dual seal; when the front valve seat 6 moves towards the flashboard 4, the connecting rod 10 stretches the connecting spring 9, after the flashboard 4 moves, the pressure of fluid disappears, and under the action of the pulling force of the connecting spring 9, the front valve seat 6 moves towards the direction far away from the flashboard 4, so that the movement of the flashboard 4 is facilitated; when the front valve seat 6 needs to be overhauled and replaced, the service cost is reduced.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a soft or hard dual seal seat plate valve, includes valve body (1), valve gap (2), valve rod (3) and flashboard (4), the bottom of valve rod (3) is rotated with the top of flashboard (4) and is connected its characterized in that: valve seat assemblies are arranged on two sides of the flashboard (4); the valve seat assembly mainly comprises a rear valve seat (5) and a front valve seat (6), the rear valve seat (5) is arranged on the inner side wall of the valve body (1), the rear valve seat (5) is annular, the front valve seat (6) is arranged on one side, close to the flashboard (4), of the rear valve seat (5), and the front valve seat (6) is installed in the rear valve seat (5); a transverse connecting rod (10) is fixedly arranged on one side, close to the rear valve seat (5), of the front valve seat (6), a connecting groove (11) corresponding to the connecting rod (10) is formed in the surface of the rear valve seat (5), the connecting rod (10) is located in the connecting groove (11), a connecting spring (9) is arranged in the connecting groove (11), and two ends of the connecting spring (9) are fixedly connected with the inner side wall of the connecting groove (11) and the connecting rod (10) respectively; preceding disk seat (6) are close to the one end of flashboard (4) and install and have elastic soft sealing member (12), the both sides of soft sealing member (12) are provided with hard sealing member (13), soft sealing member (12) and hard sealing member (13) all laminate closely with flashboard (4) surface.

2. The soft and hard double seal seat flat gate valve according to claim 1, characterized in that: the soft seal (12) includes but is not limited to an EPDM sealing ring and the hard seal (13) includes but is not limited to a weld overlay stainless steel, alloy steel, copper alloy or cobalt chromium tungsten hard alloy layer.

3. The soft and hard double seal seat flat gate valve according to claim 1, characterized in that: be provided with between back disk seat (5) and preceding disk seat (6) and have elastic connecting piece (8), connecting piece (8) are the rubber material.

4. The soft and hard double seal seat plate gate valve according to claim 3, wherein: the connecting rods (10) are provided with two groups, and the two groups of connecting rods (10) are respectively positioned on two sides of the connecting piece (8).

5. The soft and hard double seal seat flat gate valve according to claim 1, characterized in that: the joint of the top end of the front valve seat (6) and the rear valve seat (5) is provided with a wavy positioning ring, and the positioning ring is embedded on the surface of the front valve seat (6).

6. The soft and hard double seal seat flat gate valve according to claim 1, characterized in that: two sets of annular seal grooves (7) are seted up to the one end that back disk seat (5) are close to valve body (1), be provided with the resilience formula PEEK sealing washer in seal groove (7).