CN211901634U

CN211901634U - Double-sealing gate valve with high sealing performance

Info

Publication number: CN211901634U
Application number: CN202020528094.0U
Authority: CN
Inventors: 潘春芳; 胡小群; 翁献豪; 林帆
Original assignee: Yongkang Lianggong Valve Co ltd
Current assignee: Yongkang Lianggong Valve Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-11-10
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a double sealing's high leakproofness gate valve, the bottom of valve body is fixed with the cylinder, is equipped with the piston in the cylinder, and the top of piston is fixed with the ejector pin that inserts in the gate slot, and the bottom of cylinder communicates in one side of annular rubber air bag through the pipe, and the top of valve body is passed through the screw fixation and is had the valve gap, is equipped with the gate in the valve gap and accomodates the groove, and the valve gap top is connected with the bull stick that inserts the threaded hole through the bearing rotation, and the both sides wall of gate slot all is equipped with seal ring. When this gate contradicts the ejector pin through the gate and promotes the piston and move down, the piston passes through the pipe with the gas in the cylinder and discharges to annular rubber gasbag in for annular rubber gasbag inflation, annular rubber gasbag inflation then with gate surface in close contact with, thereby make the gate seal by annular rubber gasbag again after seal ring's first seal, realize double seal, improve and prevent leaking the effect.

Description

Double-sealing gate valve with high sealing performance

Technical Field

The utility model relates to a gate valve technical field specifically is a double seal's high leakproofness gate valve.

Background

The gate valve is a shutter, the movement direction of the shutter is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. Gate valves are sealed by the contact of the valve seat and gate plate, and the sealing surface is usually welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate is divided into a rigid gate plate and an elastic gate plate according to the difference of the gate plate. When the gate valve is closed, the sealing surface can be sealed only by medium pressure, namely, the sealing surface of the gate plate is pressed to the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface, namely, the gate valve is self-sealed. Most gate valves are forcedly sealed, namely, when the valves are closed, the gate plates are forced to press the valve seats by external force so as to ensure the sealing performance of the sealing surfaces.

The existing gate valve is mostly sealed by adopting a sealing gasket, the sealing capability of the gate valve is easily reduced after the sealing gasket is worn and damaged, and the leakage accident is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double seal's high leakproofness gate valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a double-sealing gate valve with high sealing performance comprises a valve body, a valve cavity is arranged in the valve body, water gaps communicated with the valve cavity are formed in the two sides of the valve body, a protruding nozzle is arranged on one side of the water gap, which is positioned in the valve cavity, an annular rubber air bag is fixed on the outer side of the protruding nozzle, the inner wall of the valve cavity is provided with a gate slot, a gate inserted in the gate slot is arranged in the valve cavity, the top of the gate is provided with a threaded hole, the bottom of the valve body is fixed with a cylinder barrel, a piston is arranged in the cylinder barrel, the top of the piston is fixed with a mandril inserted into the gate slot, the bottom of the cylinder barrel is communicated with one side of the annular rubber air bag through a conduit, the top of the valve body is fixed with a valve cover through screws, a gate accommodating groove is formed in the valve cover, the top of the valve cover is rotatably connected with a rotating rod inserted into the threaded hole through a bearing, and sealing gaskets are arranged on two side walls of the gate inserting groove.

Preferably, a pressing cap is fixed to the top of the valve cover through screws, and the pressing cap is sleeved on the outer side of the rotating rod.

Preferably, the outer ring of the bearing is fixed to the inside of the valve cover, and the inner ring of the bearing is fixed to the outside of the rotating rod.

Preferably, a second sealing ring sleeved outside the rotating rod is arranged in the valve cover, and a first sealing ring is arranged at the bottom of the valve cover.

Preferably, a threaded rod in threaded connection with the threaded hole is arranged at the bottom of the rotating rod.

Preferably, the bottom of the cylinder is connected to the bottom of the piston through a spring, and a handle is fixed to the top of the rotating rod.

Compared with the prior art, the beneficial effects of the utility model are that: when this gate contradicts the ejector pin through the gate and promotes the piston and move down, the piston passes through the pipe with the gas in the cylinder and discharges to annular rubber gasbag in for annular rubber gasbag inflation, annular rubber gasbag inflation then with gate surface in close contact with, thereby make the gate seal by annular rubber gasbag again after seal ring's first seal, realize double seal, improve and prevent leaking the effect.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the cylinder barrel structure of the present invention;

fig. 3 is a schematic view of the structure of the rotating rod of the present invention.

In the figure: 1-a valve body; 2-valve cavity; 3-water gap; 4-a protruding nozzle; 5-annular rubber air bag; 6-gate slot; 7-a cylinder barrel; 8-a catheter; 9-a spring; 10-a piston; 11-a top rod; 12-a sealing gasket; 13-a gate; 14-a threaded hole; 15-valve cover; 16-a first sealing ring; 17-a rotating rod; 18-pressing the cap; 19-a threaded rod; 20-a handle; 21-a gate receiving groove; 22-a bearing; 23-second sealing 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.

Examples

Referring to fig. 1-3, the present invention provides a technical solution: a gate valve with double sealing and high sealing performance comprises a valve body 1, wherein a valve cavity 2 is arranged in the valve body 1, water gaps 3 communicated with the valve cavity 2 are formed in two sides of the valve body 1, a protruding nozzle 4 is arranged on one side, located on the valve cavity 2, of each water gap 3, an annular rubber air bag 5 is fixed on the outer side of each protruding nozzle 4, a gate slot 6 is formed in the inner wall of the valve cavity 2, a gate 13 inserted into the gate slot 6 is arranged in the valve cavity 2, a threaded hole 14 is formed in the top of the gate 13, a cylinder 7 is fixed at the bottom of the valve body 1, a piston 10 is arranged in the cylinder 7, a mandril 11 inserted into the gate slot 6 is fixed at the top of the piston 10, the bottom of the cylinder 7 is communicated with one side of the annular rubber air bag 5 through a guide pipe 8, a valve cover 15 is fixed at the top of the valve, the top of the valve cover 15 is rotatably connected with a rotating rod 17 inserted into the threaded hole 14 through a bearing 22, and sealing gaskets 12 are arranged on two side walls of the gate slot 6. When this gate contradicts ejector pin 11 through gate 13 and promotes piston 10 and move down, piston 10 discharges the gas in the cylinder 7 to annular rubber gasbag 5 in through pipe 8 for annular rubber gasbag 5 inflation, annular rubber gasbag 5 inflation then with gate 13 surface in close contact with, thereby make gate 13 seal by annular rubber gasbag 5 again after seal ring 12's first seal, realize double seal, improve and prevent leaking the effect.

A pressing cap 18 is fixed on the top of the valve cover 15 through screws, and the pressing cap 18 is sleeved on the outer side of the rotating rod 17; the gland 18 is used to confine, seal and dust shield the bearing 22.

The outer ring of the bearing 22 is fixed on the inner side of the valve cover 15, and the inner ring of the bearing 22 is fixed on the outer side of the rotating rod 17; so that the rotating rod 17 can be rotated in situ.

A second sealing ring 23 sleeved outside the rotating rod 17 is arranged in the valve cover 15, and a first sealing ring 16 is arranged at the bottom of the valve cover 15; both the second seal ring 23 and the first seal ring 16 improve the sealing property.

The bottom of the rotating rod 17 is provided with a threaded rod 19 in threaded connection with the threaded hole 14; so that the threaded rod 19 can move the shutter 13.

The bottom of the cylinder barrel 7 is connected to the bottom of the piston 10 through a spring 9, and a handle 20 is fixed to the top of the rotating rod 17; the spring 9 is used for pushing the piston 10 to move upwards, and a handle 20 is arranged for conveniently rotating the rotating rod 17.

Working principle or structure principle, when opening the gate valve, drive bull stick 17 rotatory through rotatory handle 20, bull stick 17 is spacing by bearing 22 for bull stick 17 original place rotation drives threaded rod 19 at screw hole 14 internal rotation, makes gate 13 shift up under the screw drive, makes gate 13 remove to the gate and accomodate in the groove 21, thereby makes the gate valve open. The spring 9 pushes the piston 10 to move upwards in the process of moving the gate 13 upwards, and water pressure is matched to enable gas which is not in the annular rubber air bag 5 to enter a space which is positioned at the lower part of the piston 10 in the cylinder barrel 7 through the guide pipe 8, so that the annular rubber air bag 5 contracts, the annular rubber air bag 5 is not in surface contact with the gate 13, and the gate 13 can move upwards smoothly. When closing the valve, rotatory bull stick 17 promotes gate 13 and inserts gate slot 6, conflict ejector pin 11 at gate 13 and promote piston 10 when shifting down, piston 10 discharges the gas in the cylinder 7 to annular rubber gasbag 5 in through pipe 8, make annular rubber gasbag 5 inflation, annular rubber gasbag 5 inflation then with gate 13 surface in close contact with, thereby make gate 13 sealed by annular rubber gasbag 5 again after seal ring 12's first seal, realize double seal, improve and prevent leaking the effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high leakproofness gate valve of double seal, includes the valve body, its characterized in that: the improved water-saving valve is characterized in that a valve cavity is arranged in the valve body, water gaps communicated with the valve cavity are formed in the two sides of the valve body, a protruding nozzle is arranged on one side, located in the valve cavity, of each water gap, an annular rubber air bag is fixed to the outer side of the protruding nozzle, a gate inserting groove is formed in the inner wall of the valve cavity, a gate inserted into the gate inserting groove is arranged in the valve cavity, a threaded hole is formed in the top of the gate, a cylinder barrel is fixed to the bottom of the valve body, a piston is arranged in the cylinder barrel, an ejector rod inserted into the gate inserting groove is fixed to the top of the piston, the bottom of the cylinder barrel is communicated with one side of the annular rubber air bag through a guide pipe, a valve cover is fixed to the top of the valve body through screws, a gate.

2. The double-sealed high-sealability gate valve according to claim 1, wherein: the top of the valve cover is fixed with a pressing cap through screws, and the pressing cap is sleeved on the outer side of the rotating rod.

3. The double-sealed high-sealability gate valve according to claim 1, wherein: the outer ring of the bearing is fixed on the inner side of the valve cover, and the inner ring of the bearing is fixed on the outer side of the rotating rod.

4. The double-sealed high-sealability gate valve according to claim 1, wherein: a second sealing ring sleeved outside the rotating rod is arranged in the valve cover, and a first sealing ring is arranged at the bottom of the valve cover.

5. The double-sealed high-sealability gate valve according to claim 1, wherein: and a threaded rod in threaded connection with the threaded hole is arranged at the bottom of the rotating rod.

6. The double-sealed high-sealability gate valve according to claim 1, wherein: the bottom of the cylinder barrel is connected to the bottom of the piston through a spring, and a handle is fixed to the top of the rotating rod.