CN218267565U

CN218267565U - Packing leakage-proof sealing device

Info

Publication number: CN218267565U
Application number: CN202222499325.1U
Authority: CN
Inventors: 徐宗策; 王志勇; 赵亮; 柳作
Original assignee: Zhejiang Chaozhong Valves Made Co ltd
Current assignee: Zhejiang Chaozhong Valves Made Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-10
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses a packing prevents leaking sealing device, including valve body and valve rod, the runner that supplies the fluid to pass through has on the valve body, be provided with the axle sleeve in the valve body, the valve rod is connected with the axle sleeve rotation, the outside of valve rod is provided with two movable sleeves, the movable sleeve is ladder sleeve structure, and its internal and external diameter respectively with valve body and valve rod cooperation, the one end that two movable sleeves diameters are little sets up relatively, and be formed with the gas storage chamber, and the movable sleeve can slide along the valve rod, the position that the valve body corresponds the gas storage chamber can be dismantled and be connected with the piece of inflating, one side that two movable sleeves kept away from each other all fills there is the packing, the top of valve body is provided with the valve gap that is used for sealing packing, the valve gap passes through bolt and valve body fixed connection, the utility model discloses an increase the piece of inflating on the valve body, can let in gas storage intracavity, utilize the pressure that gaseous produced to promote movable sleeve to compress tightly the packing, thereby reach double-sealed effect, so can overcome the problem that conventional packing device exists and reveal.

Description

Packing leakage-proof sealing device

Technical Field

The utility model discloses a packing prevents leaking sealing device belongs to valve body technical field.

Background

A valve is defined as a device used to control the direction, pressure, and flow of a fluid in a fluid system. The valve is a device that can control the flow rate of a medium (liquid, gas, powder) in a pipe or equipment while allowing or stopping the flow of the medium. Usually have the valve rod of control fluid flow break-make in the valve, general manual operation controls, the valve rod rotates with the valve to be connected, and among the traditional valve structure, certain clearance has between the two, in order to guarantee its leakproofness, mostly adopt to establish the sealing washer at the outside cover of valve rod, nevertheless because the sealing washer produces the friction with the inner wall of valve when the installation, thereby it takes place deformation to seal to need to rely on pressure to make it simultaneously, so can appear easily that the sealing washer life is short, the valve needs frequent maintenance, and the cost is higher and not too practical.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a packing leakage-proof sealing device in order to solve the problem in the prior art.

The utility model discloses a following technical scheme realizes above-mentioned purpose, a packing is prevented leaking sealing device, including valve body and valve rod, the runner that supplies the fluid to pass through has on the valve body, be provided with the axle sleeve in the valve body, the valve rod rotates with the axle sleeve to be connected, the outside of valve rod is provided with two movable sleeves, the movable sleeve is ladder sleeve structure, and its internal and external diameter respectively with valve body and valve rod cooperation, two the little one end of movable sleeve diameter sets up relatively to be formed with the gas storage chamber, and the movable sleeve can slide along the valve rod, the position that the valve body corresponds the gas storage chamber can be dismantled and be connected with the piece of aerifing, two one side that the movable sleeve kept away from each other all is filled with the packing, the top of valve body is provided with the valve gap that is used for sealing packing, the valve gap passes through bolt and valve body fixed connection.

Preferably, the inflation piece comprises a fixing piece, a piston and a spring, one end of the fixing piece is in threaded connection with the valve body, an air inlet hole is formed in the fixing piece, the piston is of a stepped shaft structure and is slidably mounted on the inner side of the fixing piece, an air guide channel is arranged in the piston, an air guide hole is formed in one end close to the air inlet hole, an air outlet hole is formed in the other end of the piston, a groove for communicating the air inlet hole with the air guide hole is formed in the piston, and the spring is sleeved on the outer side of the piston.

Preferably, one end of the air guide channel, which is close to the air storage cavity, is provided with a sealing plug.

Preferably, the end of the fixing part is provided with a hexagonal knob protrusion.

Preferably, the valve body and the valve rod are provided with annular grooves corresponding to the filling positions of the packing.

Preferably, a spacer ring is arranged above the valve body corresponding to the shaft sleeve.

Compared with the prior art, the beneficial effects of the utility model are that:

through setting up the piece of aerifing, can fill gas to the gas storage chamber that two movable sleeves formed, when atmospheric pressure increase, can promote the movable sleeve compression packing to make it inseparabler, in order to reach double seal's effect, and prevent the outward possibility of revealing of fluid in the valve body, it is sealed effectual.

Drawings

FIG. 1 is a half sectional view of a packing leakage preventing sealing device of the present invention;

FIG. 2 is a schematic structural view of the inflatable member of the present invention;

FIG. 3 is a schematic view of the internal structure of the inflatable member of the present invention;

fig. 4 is a schematic structural view of a piston according to the present invention;

reference numerals are as follows: 1. a valve stem; 2. a bolt; 3. an annular groove; 4. an inflatable member; 5. a spacer ring; 6. a flow channel; 7. a shaft sleeve; 8. a movable sleeve; 9. a gas storage cavity; 10. a valve cover; 11. the hexagonal knob is raised; 12. an air inlet; 13. a fixing member; 14. a piston; 15. an air vent; 16. a spring; 17. blocking; 18. an air outlet; 19. a groove; 20. a valve body; 21. an air guide channel.

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 fig. 1-4, a packing leakage-proof sealing device comprises a valve body 20 and a valve rod 1, wherein a flow passage 6 for fluid to pass through is arranged on the valve body 20, a shaft sleeve 7 is arranged in the valve body 20, the valve rod 1 is rotatably connected with the shaft sleeve 7, two movable sleeves 8 are arranged on the outer side of the valve rod 1, the movable sleeves 8 are in a stepped sleeve structure, the inner diameter and the outer diameter of each movable sleeve are respectively matched with the valve body 20 and the valve rod 1, one ends of the two movable sleeves 8 with small diameters are oppositely arranged and form an air storage cavity 9, the movable sleeves 8 can slide along the valve rod 1, an air filling member 4 is detachably connected at the position of the valve body 20 corresponding to the air storage cavity 9, packing is filled at one side of the two movable sleeves 8 far away from each other, a valve cover 10 for sealing the packing is arranged at the top of the valve body 20, the valve cover 10 is fixedly connected with the valve body 20 through a bolt 2, the air filling member 4 comprises a fixing member 13, a piston 14 and a spring 16, one end of the fixed part 13 is connected with the valve body 20 by screw thread, and the fixed part 13 is provided with an air inlet 12, the piston 14 is in a stepped shaft structure and is slidably mounted at the inner side of the fixed part 13, the piston 14 is provided with an air guide channel 21, one end close to the air inlet 12 is provided with an air guide hole 15, the other end is provided with an air outlet 18, the piston 14 is provided with a groove 19 for conducting the air inlet 12 and the air guide hole 15, the spring 16 is sleeved at the outer side of the piston 14, when the inflation tube is inserted into the air inlet 12, the piston 14 compresses the spring 16 under the action of air pressure, so that the air enters the air guide channel 21 through the groove 19 and the air guide hole 15, the air outlet 18 is positioned in the air storage cavity 9 after the piston 14 moves, so that the air pressure in the air storage cavity 9 is continuously increased, and the two movable sleeves 8 can be pushed to slide in opposite directions, so as to compact the filler, and make it inseparabler to prevent the outside leakage of fluid in the valve body 20, reached double seal's effect, overall structure design benefit, the principle is simple and practical.

One end of the air guide channel 21 close to the air storage cavity 9 is provided with a sealing plug 17, so that the air guide channel 21, the air guide hole 15 and the air outlet hole 18 can be conveniently processed, the end part of the fixing part 13 is provided with a hexagonal knob protrusion 11, the hexagonal knob protrusion 11 can be used for facilitating the disassembly and assembly of the fixing part 13 and the valve body 20, the filling positions of the valve body 20 and the valve rod 1 corresponding to the filler are provided with the annular groove 3, when the filler is compacted and filled, the filler can be filled into the annular groove 3, the formed sectional area is larger, the sealing effect of the valve body 20 is better, the valve body 20 is provided with a spacer ring 5 corresponding to the upper part of the shaft sleeve 7, the filler can be prevented from falling into the shaft sleeve 7 and the flow channel 6 to influence the work of the valve rod 1, and the secondary pollution to the fluid in the valve body 20 is also avoided.

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.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a sealing device is prevented leaking by packing, includes valve body (20) and valve rod (1), runner (6) that supply the fluid to pass through have on valve body (20), its characterized in that, be provided with axle sleeve (7) in valve body (20), valve rod (1) is rotated with axle sleeve (7) and is connected, the outside of valve rod (1) is provided with two movable sleeves (8), movable sleeve (8) are ladder sleeve structure, and its internal and external diameter respectively with valve body (20) and valve rod (1) cooperation, two the one end that movable sleeve (8) diameter is little is relative to be set up to be formed with gas storage chamber (9), and movable sleeve (8) can slide along valve rod (1), the position that valve body (20) correspond gas storage chamber (9) can be dismantled and be connected with gas filling piece (4), two one side that movable sleeve (8) kept away from each other all is filled with the packing, the top of valve body (20) is provided with valve gap (10) that are used for sealing packing, valve gap (10) pass through bolt (2) and valve body (20) fixed connection.

2. A packing leakage-proof sealing device according to claim 1, wherein the inflating member (4) comprises a fixing member (13), a piston (14) and a spring (16), one end of the fixing member (13) is in threaded connection with the valve body (20), the fixing member (13) is provided with an air inlet hole (12), the piston (14) is in a stepped shaft structure and is slidably mounted inside the fixing member (13), an air guide channel (21) is provided in the piston (14), one end close to the air inlet hole (12) is provided with an air guide hole (15), the other end is provided with an air outlet hole (18), the piston (14) is provided with a groove (19) for communicating the air inlet hole (12) and the air guide hole (15), and the spring (16) is sleeved outside the piston (14).

3. A filler leakage preventing and sealing device according to claim 2, c h a r a c t e r i z e d in that the end of the air conducting channel (21) near the air reservoir (9) is provided with a plug (17).

4. A stuffing leakage prevention seal according to claim 2, wherein said fixing member (13) is provided at its end with a hexagonal knob projection (11).

5. A packing leakage prevention sealing device according to claim 1, wherein said valve body (20) and said valve stem (1) each have an annular groove (3) corresponding to a packing filling position.

6. A packing leakage prevention sealing arrangement, according to claim 1, characterized in that the valve body (20) is provided with a spacer ring (5) above the corresponding bushing (7).