CN219975393U - Sealing structure of butterfly valve - Google Patents

Abstract

The utility model discloses a sealing structure of a butterfly valve, which is also called a flap valve, and is a regulating valve with a simple structure, wherein the butterfly valve capable of being used for controlling the opening and closing of low-pressure pipeline media is a valve in which a closing member is a disc and rotates around a valve shaft to achieve opening and closing. When the butterfly valve needs to be opened, the butterfly plate is rotated clockwise, and the second inclined surface moves into the annular groove along with the sealing ring by the extrusion of the sealing piece until the sealing piece is completely separated from the sealing groove on the sealing ring. At this point the butterfly valve has opened. When the butterfly valve needs to be closed, the butterfly plate rotates anticlockwise, the sealing ring is driven to move into the annular groove by the first inclined surface through the extrusion of the sealing sheet until the sealing sheet is clamped in the sealing groove, the butterfly valve is closed, and the sealing ring does not completely penetrate into the annular groove all the time in the whole process. Therefore, the buffer effect can be achieved on the sealing ring, the sealing effect of the sealing ring is better, and the service life of the butterfly valve mentioned by the sealing ring is prolonged.

Description

Sealing structure of butterfly valve

Technical Field

The utility model relates to the technical field of butterfly valves, in particular to a sealing structure of a butterfly valve.

Background

The butterfly valve is also called as a flap valve, and is a simple-structure regulating valve, and can be used for the on-off control of low-pressure pipeline media. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe is mainly used for cutting and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly valve opening and closing piece in the valve body, so that the purpose of opening and closing or adjusting is achieved.

Generally, the currently used butterfly valve emphasizes the sealing effect of the sealing element between the disc and the valve casing, and a sealing ring is usually selected, but in the use process, due to the large pressure inside, the damage of the sealing ring is aggravated, the time is prolonged, a gap can be generated between the sealing ring and the disc plate, the sealing effect is affected, and the leakage condition can occur during the closing, so that the normal use is affected.

Disclosure of Invention

In order to make up for the defects, the utility model provides a sealing structure of a butterfly valve, which aims to solve the problems that the damage of a sealing ring is aggravated due to larger pressure in the butterfly valve, and a gap is possibly generated between the sealing ring and a disc plate for a long time, so that the sealing effect is affected.

The utility model is realized in the following way:

the utility model provides a sealing structure of a butterfly valve, which comprises a sealing assembly.

The sealing assembly is characterized by comprising annular grooves, valve bodies, sealing rings and spring grooves, wherein the annular grooves are formed in the inner walls of the valve bodies, the annular grooves are symmetrically formed in the valve bodies, one side of each sealing ring is arranged in each annular groove, the other side of each sealing ring extends out of each annular groove, the sealing rings are arc-shaped, the number of the sealing rings is two, the sealing rings are symmetrically arranged, the spring grooves are formed in the bottoms of the annular grooves, the spring grooves are formed between the bottoms of the spring grooves and the sealing rings, and the spring grooves are uniformly distributed at the bottoms of the annular grooves.

In a preferred technical scheme of the utility model, the sealing ring is provided with the hole grooves, the bottoms of the spring grooves are provided with the threaded holes, the positions of the threaded holes correspond to the positions of the hole grooves, and the plurality of hole grooves are uniformly distributed on the sealing ring.

In a preferred technical scheme of the utility model, screws are arranged in the hole grooves and the spring grooves, and the hole grooves are in clearance fit with the screw bodies.

In a preferred technical scheme of the utility model, a spring is arranged between the bottom of the spring groove and the sealing ring, and the spring is sleeved on the screw.

In a preferred technical scheme of the utility model, a sealing groove is formed in the sealing ring, a first inclined surface is arranged on the outer portion, far away from the sealing groove, of the sealing ring, and a second inclined surface is arranged on the inner portion, close to the sealing groove, of the sealing ring.

In a preferred technical scheme of the utility model, a butterfly plate is arranged in the valve body, a sealing piece is arranged on the outer ring of the butterfly plate, the sealing piece is fixed on the outer ring of the butterfly plate, the thickness of the sealing piece is smaller than that of the butterfly plate, and the thickness of the sealing piece corresponds to the width of the sealing groove.

In a preferred technical scheme of the utility model, the outer side of the sealing ring is attached to the outer side of the butterfly plate.

In a preferred technical scheme of the utility model, a transmission structure is arranged at the upper end of the sealing assembly, and a hand wheel is connected to the transmission structure.

In a preferred technical scheme of the utility model, a valve seat is arranged at the lower end of the sealing assembly, a valve rod is arranged in the middle of the butterfly plate, and the valve rod is connected with the valve seat and the transmission structure.

In a preferred technical scheme of the utility model, the valve body is provided with a sealing sleeve, and the sealing sleeve is sleeved on the valve rod.

The beneficial effects are that: when the butterfly valve needs to be opened, the butterfly plate is rotated clockwise, and the second inclined surface moves into the annular groove along with the sealing ring by the extrusion of the sealing piece until the sealing piece is completely separated from the sealing groove on the sealing ring. At this point the butterfly valve has opened. When the butterfly valve needs to be closed, the butterfly plate rotates anticlockwise, the sealing ring is driven to move into the annular groove by the first inclined surface through the extrusion of the sealing sheet until the sealing sheet is clamped in the sealing groove, the butterfly valve is closed, and the sealing ring does not completely penetrate into the annular groove all the time in the whole process. Therefore, the buffer effect can be achieved on the sealing ring, the sealing effect of the sealing ring is better, and the service life of the butterfly valve mentioned by the sealing ring is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an overall perspective structure provided by an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of a seal assembly according to an embodiment of the present utility model;

FIG. 3 is a plan view of a seal assembly provided in an embodiment of the present utility model;

fig. 4 is an enlarged view at a provided in an embodiment of the present utility model.

In the figure: 100-a seal assembly; 110-an annular groove; 120-valve body; 121-butterfly plate; 122-sealing sheets; 123-valve stem; 124-sealing sleeve; 130-a sealing ring; 131-hole slots; 132-screws; 133-sealing the groove; 134-a first ramp; 135-a second ramp; 140-spring slots; 141-a threaded hole; 142-springs; 200-a transmission structure; 210-a hand wheel; 300-valve seat.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: a seal structure of a butterfly valve includes a seal assembly 100.

Referring to fig. 1-4, the currently used butterfly valve focuses on enhancing the sealing effect of the sealing member between the disc and the valve housing, and usually adopts the sealing ring 130, but in the use process, due to the larger pressure inside, the damage of the sealing ring 130 is aggravated, and a gap may be generated between the sealing ring 130 and the disc for a long time.

Specifically, the seal assembly 100 includes an annular groove 110, a valve body 120, a seal ring 130, and a spring groove 140, the annular groove 110 is formed in the inner wall of the valve body 120, the annular groove 110 is symmetrically formed in the valve body 120, a butterfly plate 121 is arranged in the valve body 120, a seal plate 122 is arranged on the outer ring of the butterfly plate 121, the seal plate 122 is fixed on the outer ring of the butterfly plate 121, the thickness of the seal plate 122 is smaller than that of the butterfly plate 121, and the thickness of the seal plate 122 corresponds to the width of the seal groove 133. One side of the sealing ring 130 is arranged in the annular groove 110, the other side of the sealing ring 130 extends out of the annular groove 110, the sealing ring 130 is arc-shaped, the number of the sealing rings 130 is two, the sealing rings 130 are symmetrically arranged, and when the valve body 120 is closed, the outer side of the sealing ring 130 is attached to the outer side of the butterfly plate 121.

The sealing ring 130 is provided with a plurality of holes 131, the bottom of the spring groove 140 is provided with a plurality of threaded holes 141, the positions of the threaded holes 141 correspond to the positions of the holes 131, and the plurality of holes 131 are uniformly distributed on the sealing ring 130. The screw 132 is arranged in the hole groove 131 and the spring groove 140, and the hole groove 131 is in clearance fit with the screw 132. The sealing ring 130 is provided with a sealing groove 133, a first inclined surface 134 is arranged outside the sealing ring 130 far away from the sealing groove 133, a second inclined surface 135 is arranged inside the sealing ring 130 close to the sealing groove 133, and inclined surfaces on the two symmetrical sealing rings 130 are arranged in a mirror image mode. A spring 142 is arranged between the bottom of the spring groove 140 and the sealing ring 130, and the spring 142 is sleeved on the screw 132. The spring groove 140 is formed at the bottom of the annular groove 110, the spring groove 140 is arranged between the bottom of the spring groove 140 and the sealing ring 130, and a plurality of spring grooves 140 are uniformly distributed at the bottom of the annular groove 110.

The upper end of the sealing assembly 100 is provided with a transmission structure 200, the transmission structure 200 is connected with a hand wheel 210, the lower end of the sealing assembly 100 is provided with a valve seat 300, a valve rod 123 is arranged in the middle of the butterfly plate 121, and the valve rod 123 is connected with the valve seat 300 and the transmission structure 200.

Working principle: when the butterfly valve needs to be opened, the butterfly plate 121 is rotated clockwise, and the second inclined surface 135 moves into the annular groove 110 with the seal ring 130 by pressing the seal piece 122 until the seal piece 122 is completely separated from the seal groove 133 on the seal ring 130. At this point the butterfly valve has opened. When the butterfly valve needs to be closed, the butterfly plate 121 is rotated anticlockwise, the first inclined surface 134 moves into the annular groove 110 with the sealing ring 130 by the extrusion of the sealing piece 122 until the sealing piece 122 is clamped in the sealing groove 133, the butterfly valve is closed, and the sealing ring 130 does not completely penetrate into the annular groove 110 all the time in the whole process. Therefore, the buffer effect on the sealing ring 130 can be achieved, the sealing effect of the sealing ring 130 is better, and the service life of the butterfly valve, which is referred to by the sealing ring 130, is prolonged.

It should be noted that, the specific model specification of the seal ring 130 needs to be determined by selecting a model according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.

The principle of the transmission structure 200 will be clear to a person skilled in the art and will not be described in detail here.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A butterfly valve sealing structure is characterized by comprising

The sealing assembly comprises an annular groove, a valve body, sealing rings and spring grooves, wherein the annular groove is formed in the inner wall of the valve body, the annular groove is symmetrically formed in the valve body, one side of each sealing ring is arranged in the annular groove, the other side of each sealing ring extends out of the annular groove, the sealing rings are arc-shaped, the number of the sealing rings is two, the sealing rings are symmetrically arranged, the spring grooves are formed in the bottom of the annular groove, the spring grooves are formed between the bottom of the spring grooves and the sealing rings, and the spring grooves are uniformly distributed at the bottom of the annular groove.

2. The sealing structure of a butterfly valve according to claim 1, wherein: the sealing ring is provided with a plurality of holes, and the holes are uniformly distributed on the sealing ring.

3. The sealing structure of a butterfly valve according to claim 2, wherein: the screw is arranged in the hole groove and the spring groove, and the hole groove is in clearance fit with the screw body.

4. A butterfly valve seal according to claim 3, wherein: a spring is arranged between the bottom of the spring groove and the sealing ring, and the spring is sleeved on the screw.

5. The sealing structure of a butterfly valve according to claim 1, wherein: the sealing groove is formed in the sealing ring, the sealing ring is far away from the first inclined surface arranged outside the sealing groove, and the sealing ring is close to the second inclined surface arranged inside the sealing groove.

6. The butterfly valve seal of claim 5, wherein: the butterfly plate is arranged inside the valve body, the outer ring of the butterfly plate is provided with a sealing sheet, the sealing sheet is fixed on the outer ring of the butterfly plate, the thickness of the sealing sheet is smaller than that of the butterfly plate, and the thickness of the sealing sheet corresponds to the width of the sealing groove.

7. The butterfly valve seal of claim 6, wherein: the outer side of the sealing ring is attached to the outer side of the butterfly plate.

8. The sealing structure of a butterfly valve according to claim 1, wherein: the upper end of the sealing component is provided with a transmission structure, and the transmission structure is connected with a hand wheel.

9. The butterfly valve seal of claim 6, wherein: the lower end of the sealing component is provided with a valve seat, a valve rod is arranged in the middle of the butterfly plate, and the valve rod is connected with the valve seat and the transmission structure.

10. The butterfly valve seal of claim 9, wherein: the valve body is provided with a sealing sleeve, and the sealing sleeve is sleeved on the valve rod.