CN221990960U - A dynamic sealing structure of butterfly valve - Google Patents

Abstract

The utility model relates to a butterfly valve dynamic sealing structure, which comprises a butterfly valve main body, wherein the butterfly valve main body comprises a valve seat, a top support and a bottom support, the valve seat is in a circular ring shape, the top of the valve seat is provided with the top support, the bottom of the valve seat is provided with the bottom support, the top support, the valve seat and the bottom support are provided with a valve shaft, the surface of the valve shaft is provided with a butterfly plate, the butterfly plate is positioned at the inner diameter of the valve seat, the inner diameter surfaces of the butterfly plate and the valve seat are fixedly provided with dynamic sealing rings, the inner diameter surfaces of the dynamic sealing rings are provided with a plurality of gaps, the surface of the butterfly plate is provided with a plurality of sealing plates, the gaps are all provided with a sealing plate, and the top of the valve shaft is rotationally connected with a rotary handle; after the dynamic sealing ring provided by the utility model is worn to a certain extent, the elastic structure attached to the sealing plate is pushed by the pressure in the pipeline, so that the sealing plate is displaced by a certain angle, thereby realizing complete sealing and further realizing dynamic sealing of the butterfly plate.

Description

Butterfly valve dynamic seal structure

Technical Field

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

Background

The butterfly valve is also called as a flap valve, and is a regulating valve with simple structure, and the butterfly valve capable of being used for the on-off control of low-pressure pipeline medium is a valve in which a closing member (a valve clack or a butterfly plate) is a disc and rotates around a valve shaft to achieve opening and closing, and 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.

However, the butterfly valve in the prior art seals through the sealing ring on the outer surface of the butterfly plate, and then the butterfly plate needs to be opened and closed frequently, so that certain abrasion can be generated on the surface of the sealing ring after long-time use, further the sealing effect is not ideal enough, the condition of liquid leakage is easy to generate, and certain limitation exists.

Disclosure of utility model

The utility model aims to provide a dynamic sealing structure of a butterfly valve, which solves the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a butterfly valve dynamic seal structure, includes the butterfly valve main part, the butterfly valve main part includes disk seat, top support, bottom support, the disk seat be the ring form, the top of disk seat is provided with the top support, the bottom of disk seat is provided with the bottom support, top support, disk seat, the inside valve shaft that is provided with of bottom support, the surface of valve shaft is provided with the butterfly plate, the butterfly plate is located the internal diameter department of disk seat, the butterfly plate is provided with dynamic seal ring with the internal diameter fixed surface of disk seat, a plurality of breach has been seted up on dynamic seal ring's internal diameter surface, the surface of butterfly plate is provided with a plurality of closing plate, a plurality of breach department all is provided with a closing plate, the top rotation of valve shaft is connected with twist grip.

Preferably, the inner diameter of the dynamic seal ring is recessed inwardly on the front and back sides.

Preferably, the cross section of the sealing plate is trapezoid.

Preferably, the sealing plate is an elastic rubber plate.

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

According to the dynamic sealing structure of the butterfly valve, the sealing ring is replaced by the dynamic sealing ring on the basis of the butterfly valve in the prior art, then the gap is formed on the basis of the dynamic sealing ring, the sealing plate is arranged at the gap and connected with the butterfly plate, and after the dynamic sealing ring is worn to a certain extent, the elastic structure attached to the sealing plate is pushed by the pressure in the pipeline, so that the sealing plate is displaced by a certain angle, and the complete sealing is realized, and further the dynamic sealing of the butterfly plate is realized.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: 1. a butterfly valve body; 2. a dynamic seal ring; 3. a butterfly plate; 4. rotating the handle; 5. a notch; 6. and (5) sealing the plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, the present utility model provides a technical solution: the utility model provides a butterfly valve dynamic seal structure, including butterfly valve main part 1, butterfly valve main part 1 includes disk seat 7, top support 8, bottom support 9, disk seat 7 is annular, disk seat 7's top is provided with top support 8, disk seat 7's bottom is provided with bottom support 9, top support, the disk seat, the inside valve shaft that is provided with of bottom support, the surface of valve shaft is provided with butterfly plate 3, butterfly plate 3 is located the internal diameter department of disk seat, butterfly plate 3 and disk seat's internal diameter fixed surface are provided with dynamic seal ring 2, a plurality of breach 5 has been seted up on dynamic seal ring 2's internal diameter surface, butterfly plate 3's surface is provided with a plurality of closing plate 6, a plurality of breach 5 department all is provided with a closing plate 6, the top rotation of valve shaft is connected with twist grip 4, the staff only need rotate twist grip 4 just can open butterfly plate 3 or close, what needs to be explained is that the butterfly plate 3 opens or closes to use through twist grip 4 prior art, principle part is the same as prior art, the here will not be repeated.

Specifically, the dynamic sealing ring 2 is an annular sealing member with an opening, and is mainly applied to the parts such as an overspeed shaft of an automatic gearbox, a planetary gear train, a clutch shaft, a belt pulley and the like or an air compressor piston and the like, and the sealing ring is sleeved on a shaft groove of the shaft to reciprocate and rotate along with the ring, so that a dynamic sealing effect is achieved, the oil pressure of each cavity is assisted in establishing, the oil pressure generated by the inner circumference and the side surface can be tightly attached to the side surface and the concave surface of the shaft groove, the traditional sealing ring has the characteristic of wear resistance, the sealing ring is replaced by the dynamic sealing ring 2, and the wear of the sealing ring in the use process is relieved.

Further, the front and back surfaces of the inner diameter of the dynamic sealing ring 2 are recessed inwards, specifically, because the front and back surfaces of the inner diameter of the dynamic sealing ring 2 are recessed inwards, liquid in the pipe can flow into the gap 5, so that a great amount of liquid can be contacted with the sealing plate 6 at the gap 5, and further, the liquid can be allowed to act on the sealing plate 6, so that pressure generated by the liquid acts on the sealing plate 6 to realize dynamic sealing.

Further, the cross section of the sealing plate 6 is trapezoidal.

Further, the sealing plate 6 is an elastic rubber plate, so that the sealing plate 6 can be displaced in a moving manner, and further dynamic sealing is realized.

Working principle: according to the butterfly valve, the dynamic sealing ring 2 is replaced by the sealing ring on the basis of the butterfly valve in the prior art, then the gap 5 is formed on the basis of the dynamic sealing ring, the sealing plate 6 is arranged at the gap 5 and is connected with the butterfly plate 3, and after the dynamic sealing ring 2 is worn to a certain extent, the sealing plate 6 with an elastic structure is pushed by the pressure in the pipeline, so that the sealing plate 6 is displaced by a certain angle, and the complete sealing is realized, and further the dynamic sealing of the butterfly plate 3 is realized.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (4)

1. The utility model provides a butterfly valve dynamic seal structure, includes butterfly valve main part (1), its characterized in that: butterfly valve main part (1) is including disk seat (7), top support (8), bottom support (9), be annular for disk seat (7), the top of disk seat (7) is provided with top support (8), the bottom of disk seat (7) is provided with bottom support (9), top support, disk seat, the inside valve shaft that is provided with of bottom support, the surface of valve shaft is provided with butterfly plate (3), butterfly plate (3) are located the internal diameter department of disk seat, butterfly plate (3) are provided with dynamic seal ring (2) with the internal diameter fixed surface of disk seat, a plurality of breach (5) have been seted up on the internal diameter surface of dynamic seal ring (2), the surface of butterfly plate (3) is provided with a plurality of closing plate (6), and a plurality of breach (5) department all is provided with a closing plate (6), the top rotation of valve shaft is connected with twist grip (4).

2. The butterfly valve dynamic seal structure of claim 1, wherein: the inner diameter front and back of the dynamic sealing ring (2) are recessed inwards.

3. The butterfly valve dynamic seal structure of claim 1, wherein: the cross section of the sealing plate (6) is trapezoid.

4. The butterfly valve dynamic seal structure of claim 1, wherein: the sealing plate (6) is an elastic rubber plate.