CN212718040U

CN212718040U - Sand-proof seal shaft metal butterfly valve

Info

Publication number: CN212718040U
Application number: CN202021351073.2U
Authority: CN
Inventors: 张宇卫; 温超; 陈帅洲
Original assignee: Henan Daxin Valve Co ltd
Current assignee: Zhengzhou Zhengvalve Machinery Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-16
Anticipated expiration: 2030-07-10

Abstract

The utility model provides a prevent sealed axle metal butterfly valve of silt, including valve body, valve shaft and the dish board of setting in the valve body inside, have on the valve body and supply the perforation that the valve shaft passed along upper and lower direction, have on the dish board with the blind hole that the valve shaft lower extreme that the valve body was passed in the confession of perforation coaxial arrangement stretched into, the up end of blind hole with fenestrate lower terminal surface interval, the valve shaft has the interval section that is located between the up end of blind hole and the fenestrate lower terminal surface, interval section outside cover is equipped with and is used for sealing the spaced axle sleeve, the axial dimension more than or equal to interval section's of axle sleeve size through the cooperation installation of axle sleeve and valve body and dish board, has solved the problem that medium in the butterfly valve pipeline and particulate matter such as silt that carry easily enter the valve shaft shafting.

Description

Sand-proof seal shaft metal butterfly valve

Technical Field

The utility model relates to a metal butterfly valve technical field, concretely relates to prevent sealed axle metal butterfly valve of silt.

Background

The butterfly valve is a regulating valve with simple structure, can be used for on-off control of pipeline media, is a valve with a closing member being a disc plate, and is positioned in a valve body and rotated around a valve shaft to open and close, and is in a completely closed state when the edge of the disc plate is completely contacted with the inner side of the valve body. The valve can be used for controlling the flow of various fluids such as air, water, steam and the like, and mainly plays the roles of cutting off and throttling on a pipeline.

In the prior art, a shaft sleeve is usually sleeved on a valve shaft to ensure that a butterfly valve has enough sealing performance, but along with the increase of the service life of the butterfly valve, media in a pipeline and granular impurities such as silt carried by the media can enter a valve shaft system along with the rotation motion of the valve shaft, and after long-term use, the granular substances such as silt in the pipeline media can not only increase the friction force when the valve shaft rotates, but also cause the phenomenon of torque increase or clamping stagnation in the opening and closing processes of the butterfly valve, thereby affecting the normal use of the butterfly valve and greatly shortening the service life of the butterfly valve; when the transmission medium in the pipeline is strong acid or strong alkali, the valve shaft is not only irreversibly damaged, but also the medium and chemical reactants thereof remained at the valve shaft in the transmission process of the medium pollute the medium in the pipeline.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent sealed axle metal butterfly valve of silt aims at solving among the prior art medium in the butterfly valve pipeline and the technical problem that granular material such as silt that carries easily enters into valve shaft system.

For realizing above-mentioned purpose, a prevent silt seal shaft metal butterfly valve, including valve body, valve shaft and setting at the inside dish board of valve body, have on the valve body and supply the valve shaft to follow the perforation that upper and lower direction passed, have on the dish board with the blind hole that the valve shaft lower extreme that the valve body was passed in the confession of perforation coaxial arrangement stretched into, the up end of blind hole with fenestrate lower terminal surface interval, the valve shaft has the interval section between the up end that is located the blind hole and the fenestrate lower terminal surface, interval section outside cover is equipped with and is used for sealing the spaced axle sleeve, the axial dimension more than or equal to interval section's of axle sleeve size.

Preferably, the upper end of the shaft sleeve is fixed on the inner side of the through hole, and the lower end of the shaft sleeve is in contact with the inner side of the upper end of the blind hole.

Preferably, a first clamping step is arranged on the inner side of the through hole, and a second clamping step matched with the first clamping step is arranged on the side wall of the upper portion of the shaft sleeve.

Preferably, the number of the first clamping steps is two, and the two first clamping steps are uniformly distributed along the axial direction of the through hole.

Preferably, the inner side of the blind hole is provided with a third clamping step, and the side wall of the lower part of the shaft sleeve is provided with a fourth clamping step matched with the third clamping step.

Preferably, the number of the third clamping steps is two, and the two third clamping steps are uniformly distributed along the axial direction of the through hole.

Preferably, the third engagement step is disposed at an orifice of the blind hole.

The utility model has the advantages that: the utility model discloses a valve body, valve shaft and setting have the perforation that supplies the valve shaft to pass along upper and lower direction on the valve body at the inside dish board of valve body, have on the dish board with the blind hole that the confession of perforation coaxial arrangement passed the valve shaft lower extreme of valve body stretched into, the up end of blind hole with fenestrate lower terminal surface interval, the valve shaft has the interval section that is located between the up end of blind hole and the fenestrate lower terminal surface, interval section outside cover is equipped with and is used for sealing the spaced axle sleeve, the axial dimension more than or equal to of axle sleeve separates the size of section, and it is enough to have guaranteed the leakproofness of axle sleeve.

Furthermore, the perforated inboard is provided with first block step, the upper portion lateral wall of axle sleeve be provided with the second block step of first block step adaptation, the card platform step not only has the advantage that the manufacturing process degree of difficulty is little, simple structure, has increased the area of contact of sealing member with the valve body moreover, has prolonged the path length that impurity in the pipeline got into the valve shaft shafting, and the medium in the pipeline and granular silt such as silt carried by it produce throttling effect through layer upon layer ladder face clearance thereby reach the purpose of stopping leakage.

Furthermore, the third clamping step is arranged at the hole of the blind hole, so that the manufacturing difficulty is reduced.

Furthermore, the upper portion of the shaft sleeve is provided with a sealing ring in sealing fit with the through hole, the lower portion of the shaft sleeve is provided with a sealing ring in sealing fit with the blind hole, and through the double sealing mode of the shaft sleeve and the sealing ring, not only is the medium in the pipeline and particulate impurities such as silt carried by the medium effectively prevented from entering the valve shaft system, but also the medium in the pipeline is prevented from being polluted by reactants generated by the contact of the medium in the valve shaft and the pipeline.

Drawings

Fig. 1 is a schematic structural diagram of a specific embodiment of the metal butterfly valve of the silt-proof sealing shaft of the present invention.

Fig. 2 is a schematic structural diagram of a sealing member of a specific embodiment of the metal butterfly valve for a silt-proof sealing shaft of the present invention.

In the figure: 1. a valve body; 2. a shaft sleeve; 4. A valve shaft; 5. a dish plate.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The utility model discloses prevent sealed axle metal butterfly valve of silt's concrete embodiment, as shown in fig. 1 and fig. 2, a prevent sealed axle metal butterfly valve of silt, including valve body 1, valve shaft 4 and set up at the inside dish board 5 of valve body, have on the valve body 1 and supply the perforation that valve shaft 4 passed along upper and lower direction, have on the dish board 5 with the blind hole that the confession of perforation coaxial arrangement passed the valve shaft 4 lower extreme of valve body stretched into, the up end of blind hole with fenestrate lower terminal surface interval, valve shaft 4 has the interval section that is located between the up end of blind hole and the fenestrate lower terminal surface, interval section outside cover is equipped with and is used for sealing spaced axle sleeve 2, the axial dimension more than or equal to interval section's of axle sleeve size has guaranteed that the leakproofness of axle sleeve is enough.

In this embodiment, the upper end of the shaft sleeve 2 is fixed on the inner side of the through hole, and the lower end of the shaft sleeve 2 is in contact with the inner side of the upper end of the blind hole.

In this embodiment, fenestrate inboard is provided with first block step, the upper portion lateral wall of axle sleeve 2 be provided with the second block step of first block step adaptation, the block platform step not only has the advantage that the manufacturing process degree of difficulty is little, simple structure, has increased the area of contact of sealing member with the valve body moreover, has prolonged the path length that impurity in the pipeline got into the valve shaft shafting, thereby medium in the pipeline and granular silt such as silt carried by it produce throttling effect through layer upon layer ladder face clearance and reach the purpose of stopping leakage.

In this embodiment, the number of the first engaging steps is two, and the two first engaging steps are distributed along the axial direction of the through hole.

In this embodiment, in order to guarantee axle sleeve and dish board complex stability, specially the inboard of blind hole has set up the third block step, and the lateral wall of the lower part of axle sleeve 2 is provided with the fourth block step with the adaptation of third block step, and wherein fenestrate axial equipartition is all followed to third block step and fourth block step.

In this embodiment, the third joint step sets up in the orifice department of blind hole, has reduced the manufacturing degree of difficulty.

In this embodiment, the upper portion of axle sleeve 2 is provided with the sealed complex sealing washer with the perforation, and 2 lower parts of axle sleeve are provided with the sealed complex sealing washer with the blind hole, and through the double seal form of axle sleeve 2 and sealing washer, not only effectively avoided the medium in the pipeline and particulate impurity such as silt that carries to get into the valve shaft system, avoided the medium contact in valve shaft and the pipeline to generate the reactant to produce the pollution to the medium in the pipeline moreover.

In other embodiments, the first and second snap steps may be replaced by one snap step provided on the valve body 1 around the valve shaft 4.

In other embodiments, the third and fourth snap steps may be replaced by one snap step provided on the disc 5 around the valve shaft 4.

In other embodiments, the stepped groove for embedding the sealing component, which is arranged on the inner sides of the valve body 1 and the disc plate 5, can also be replaced by other groove structures.

Claims

1. The utility model provides a prevent silt seal shaft metal butterfly valve, includes valve body, valve shaft and sets up the dish board in the valve body inside, has on the valve body and supplies the valve shaft to pass along the perforation that upper and lower direction passed, have on the dish board with the blind hole that the confession of perforation coaxial arrangement passed the valve shaft lower extreme of valve body stretched into, the up end of blind hole with fenestrate lower terminal surface interval, its characterized in that: the valve shaft is provided with a spacing section between the upper end face of the blind hole and the lower end face of the through hole, a shaft sleeve used for sealing the spacing section is sleeved on the outer side of the spacing section, and the axial size of the shaft sleeve is larger than or equal to that of the spacing section.

2. The silt-proof seal shaft metal butterfly valve of claim 1, wherein: the upper end of the shaft sleeve is fixed on the inner side of the through hole, and the lower end of the shaft sleeve is in contact with the inner side of the upper end of the blind hole.

3. The silt-proof seal shaft metal butterfly valve of claim 2, wherein: the inner side of the through hole is provided with a first clamping step, and the side wall of the upper part of the shaft sleeve is provided with a second clamping step matched with the first clamping step.

4. The silt-proof seal shaft metal butterfly valve of claim 3, wherein: the number of the first clamping steps is two, and the two first clamping steps are uniformly distributed along the axial direction of the through hole.

5. The silt-proof seal shaft metal butterfly valve according to any one of claims 2 to 4, wherein: the inner side of the blind hole is provided with a third clamping step, and the side wall of the lower part of the shaft sleeve is provided with a fourth clamping step matched with the third clamping step.

6. The silt-proof seal shaft metal butterfly valve of claim 5, wherein: the number of the third clamping steps is two, and the two third clamping steps are uniformly distributed along the axial direction of the through hole.

7. The silt-proof seal shaft metal butterfly valve of claim 6, wherein: the third clamping step is arranged at the hole of the blind hole.

8. The silt-proof seal shaft metal butterfly valve according to any one of claims 1 to 4, wherein: and the upper part of the shaft sleeve is provided with a sealing ring in sealing fit with the through hole, and the lower part of the shaft sleeve is provided with a sealing ring in sealing fit with the blind hole.