CN211875155U

CN211875155U - High leakproofness ball valve

Info

Publication number: CN211875155U
Application number: CN201922190594.8U
Authority: CN
Inventors: 时永宾
Original assignee: Henan Taoen Machinery Co ltd
Current assignee: Henan Fujia fluid control technology Co., Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-11-06
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses a high leakproofness ball valve relates to valve technical field, including valve body, valve gap, case ball and valve rod, the valve body with valve gap fixed connection constitutes and is used for placing the valve body chamber of case ball, the valve rod with case ball fixed connection, the upper end of valve rod is connected with the handle bar, the valve body with constitute the ascending sealed chamber of opening between the valve rod, upward filler, well filler and last filler are equipped with down from up in proper order down in the sealed chamber, down filler with the upper surface of well filler is equipped with the convex surface respectively, go up filler with the lower surface branch of well filler be equipped with convex surface matched with concave surface, the angle of convex surface is greater than the angle of concave surface. The utility model discloses set up the convex surface angle of packing into the angle that is greater than the filler concave surface, during the pushing down, arouse more easily and compress tightly the deformation, compensated the decay of axial packing force, realized that the continuation of packing is sealed.

Description

High leakproofness ball valve

Technical Field

The utility model relates to the technical field of valves, in particular to high leakproofness ball valve.

Background

Ball valve, the open-close piece (ball) is driven by the valve rod and rotates around the axis of the ball valve. The ball valve can also be used for regulating and controlling fluid, and is widely applied to the fields of petroleum, chemical engineering, metallurgy, light spinning, food, atomic energy, aviation and the like because the ball valve has a simple structure, reliable sealing and convenient maintenance, and a sealing surface and a ball body are always in a closed state and are not easily eroded by a medium.

The packing is widely used for sealing between the valve rod and the valve body of the ball valve, and the soft packing can deform under the action of pressure due to plasticity of the soft packing along with opening and closing of the valve, so that radial pressing force is generated between the valve rod and the packing, the packing is tightly compressed on the valve rod and the inner wall of a packing cavity, and the purpose of sealing is achieved. However, the soft filler has the characteristic that the distribution of pressure along the axial direction of the filler is in gradient change, and when the compression force is attenuated due to the fact that the borne pressure is reduced, the filler cannot play a sealing role, and leakage is caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a high leakproofness ball valve solves current ball valve and leads to packing to play sealed problem because the packing force decay.

(II) technical scheme

In order to solve the technical problem, the utility model provides a technical scheme does:

the utility model provides a high leakproofness ball valve, includes valve body, valve gap, case ball and valve rod, the valve body with valve gap fixed connection constitutes and is used for placing the valve body chamber of case ball, the valve rod with case ball fixed connection, the upper end of valve rod is connected with the handle pole, the valve body with constitute the ascending sealed chamber of opening between the valve rod, from up being equipped with down filler, well filler and last filler down in proper order down in the sealed chamber, down the filler with the upper surface of well filler is equipped with the convex surface respectively, go up the filler with the lower surface branch of well filler be equipped with convex surface matched with concave surface, the angle of convex surface is greater than the angle of concave surface.

Wherein, preferably, the angle of the convex surface is 100 ° and the angle of the concave surface is 90 °. The angle of the convex surface is an included angle formed by extension lines of two side surfaces in the cross section, and the angle of the concave surface is an included angle formed by extension lines of two side surfaces in the cross section.

Wherein, preferably, the quantity of the medium filler is 4.

Among them, preferably, the lower filler, the middle filler and the upper filler are PTFE fillers, respectively.

Preferably, a lower pressing ring, graphite filler, an upper pressing ring, a disc spring and a pressing plate are sequentially arranged above the upper filler, and the pressing plate is fixedly connected with the valve body through a bolt.

Preferably, the inner side surface of the pressure plate is embedded with a bushing.

Wherein, preferably, be equipped with thrust pad between the bottom of valve rod and the valve body.

Preferably, the joint of the valve body and the valve cover is provided with a first sealing gasket and a second sealing gasket which are respectively arranged at one end close to the valve body cavity, and the first sealing gasket and the second sealing gasket are distributed in a Z shape.

(III) advantageous effects

The technical scheme provided by the utility model, compared with prior art, following beneficial effect has:

1. the utility model provides a pack for the multilayer filler, pack the thickness attenuate, quantity increases, and sealed point increases, does benefit to sealedly.

2. The utility model discloses set up the convex surface angle of packing into the angle that is greater than the filler concave surface, during the pushing down, arouse more easily and compress tightly the deformation, compensated the decay of axial packing force, realized that the continuation of packing is sealed.

3. The utility model discloses compare with current packing, the emergence of the valve leakage phenomenon that has significantly reduced improves the sealing performance of valve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other embodiments can be obtained according to the drawings without creative efforts;

FIG. 1 is a schematic structural view of a middle nut type ball valve without a disc spring packing system of the present invention;

fig. 2 is the structure schematic diagram of the middle and lower fillers, the middle fillers and the upper fillers of the present invention.

In the figure: 1. the valve comprises a valve body, 2 parts of a valve cover, 3 parts of a valve core ball, 4 parts of a valve rod, 5 parts of a valve body cavity, 6 parts of a handle rod, 7 parts of a sealing cavity, 8 parts of lower packing, 9 parts of filler, 10 parts of upper packing, 11 parts of a thrust gasket, 12 parts of a lower pressing ring, 13 parts of graphite packing, 14 parts of an upper pressing ring, 15 parts of a

disc spring

15, 16 parts of a pressing plate, 17 parts of a lining, 18 parts of a first sealing gasket, 19 parts of a second sealing gasket

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to specific embodiments of the present invention, and it should be understood 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, fig. 2, this embodiment provides a high leakproofness ball valve, including valve body 1, valve gap 2, valve core ball 3 and valve rod 4, valve body 1 and valve gap 2 fixed connection constitute the valve body chamber 5 that is used for placing valve core ball 3, valve rod 4 and 3 fixed connection of valve core ball, the upper end of valve rod 4 is connected with handle bar 6, constitute ascending seal chamber 7 of opening between valve body 1 and the valve rod 4, from up being equipped with down packing 8 down in proper order down in the seal chamber 7, packing 9 and last packing 10 in, the upper surface of packing 8 and middle packing 9 is equipped with the convex surface respectively down, the lower surface of going up packing 10 and middle packing 9 is equipped with the concave surface with convex surface matched with, the angle of convex surface is greater than the angle of concave surface.

Specifically, the angle of the convex surface is 100 ° and the angle of the concave surface is 90 °. The convex angle is set to be larger than the angle of the concave surface of the filler, when the filler is pressed downwards, the filler is easy to cause compression deformation, the attenuation of axial pressing force is compensated, and the continuous sealing of the filler is realized. The number of the fillers 9 is 4.

Wherein, the lower filler 8, the middle filler 9 and the upper filler 10 are respectively PTFE fillers. The multilayer filler is changed into four layers of fillers from the existing common three layers of fillers, the thickness of the fillers is reduced, the number of the fillers is increased, the number of sealing points is increased, and the sealing is facilitated. In addition, the PTFE filler is soft filler, which is beneficial to the filler to form compression deformation.

Wherein, go up filler 10 top and be equipped with lower clamping ring 12, graphite packing 13, go up clamping ring 14, dish spring 15 and clamp plate 16 in proper order, clamp plate 16 passes through bolt and valve body 1 fixed connection. PTFE and graphite double packing and other sealing designs of the valve body 1 have the fireproof function. The outer high temperature resistant graphite filler 13 may still function as a seal when the inner PTFE filler is burned off as a result of a media fire.

Wherein, the medial surface of clamp plate is inlayed and is equipped with bush 17, sets up bush 17, can prevent the wearing and tearing or the card of clamp plate and die, guarantees that the clamp plate can normally work.

Wherein, be equipped with thrust pad 11 between the bottom of valve rod 4 and valve body 1, thrust pad 11 plays thrust bearing's effect.

The joint of the valve body 1 and the valve cover 2 is provided with a first sealing gasket 18 and a second sealing gasket 19 which are respectively arranged at one end close to the cavity of the valve body 1, the first sealing gasket 18 and the second sealing gasket 19 are distributed in a Z shape and matched with the filler, and the first sealing gasket and the second sealing gasket play a good sealing role in the cavity of the valve body 1.

It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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 ball valve, includes valve body, valve gap, case ball and valve rod, the valve body with valve gap fixed connection constitutes and is used for placing the valve body chamber of case ball, the valve rod with case ball fixed connection, the upper end of valve rod is connected with the handlebar, its characterized in that: the valve body with constitute the ascending sealed chamber of opening between the valve rod, from up being equipped with down packing, well filler and last filler in proper order down in the sealed chamber, down pack with the upper surface of well filler is equipped with the convex surface respectively, go up the filler with the lower surface branch of well filler be equipped with convex surface matched with concave surface, the angle of convex surface is greater than the angle of concave surface.

2. A high-sealing ball valve according to claim 1, wherein: the angle of the convex surface is 100 degrees, and the angle of the concave surface is 90 degrees.

3. A high-sealing ball valve according to claim 1, wherein: the number of the medium fillers is 4.

4. A high-sealing ball valve according to claim 1, wherein: the lower filler, the middle filler and the upper filler are PTFE fillers respectively.

5. A high-sealing ball valve according to claim 1, wherein: and a lower compression ring, graphite filler, an upper compression ring, a disc spring and a pressing plate are sequentially arranged above the upper filler, and the pressing plate is fixedly connected with the valve body through a bolt.

6. The high-sealability ball valve of claim 5, wherein: and a lining is embedded on the inner side surface of the pressure plate.

7. A high-sealing ball valve according to claim 1, wherein: and a thrust pad is arranged between the bottom end of the valve rod and the valve body.