CN211231610U

CN211231610U - Novel pneumatic expansion butterfly valve

Info

Publication number: CN211231610U
Application number: CN201922136941.9U
Authority: CN
Inventors: 陈天顺
Original assignee: Shanghai Kerui Valve Co ltd
Current assignee: Shanghai Kerui Valve Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-08-11
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a novel pneumatic expansion butterfly valve, which belongs to the field of valves and comprises a valve body, a valve rod, a butterfly plate and an actuating mechanism, and further comprises an elastic expansion valve seat, wherein the elastic expansion valve seat is in a cylindrical tube shape, two ends of the circumferential outer wall of the elastic expansion valve seat are respectively provided with an annular flange, two ends of the valve body are respectively provided with an annular step groove matched with the annular flange, and the annular flange is fixed on the annular step groove through screws; an annular limiting convex ring is arranged on the circumferential outer wall of the elastic expansion valve seat, and a limiting groove matched with the annular limiting convex ring is arranged on the inner wall of the valve body; the circumference lateral wall of elasticity inflation disk seat is provided with the through-hole with valve rod looks adaptation, is provided with annular ventilation groove on the inner wall of valve body, is provided with on the valve body outer wall and aerifys the interface and bleed the interface, aerifys the interface and all communicates with annular ventilation groove with the interface of bleeding. The utility model discloses not only prevent that the elasticity inflation disk seat from droing and shifting, still have faster response speed.

Description

Novel pneumatic expansion butterfly valve

Technical Field

The utility model relates to a valve field, in particular to novel pneumatic inflation formula butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. 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, and mainly plays a role in cutting off and throttling on a pipeline. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.

As the valve capable of cutting off the medium, the butterfly plate is generally in close contact with the sealing seat to realize sealing, but when the butterfly plate of the existing butterfly valve is opened and closed, the butterfly plate can generate friction action with the sealing seat, and as a result of the friction action, the butterfly plate or the sealing seat is easily abraded after the butterfly valve is opened and closed for many times, so that the contact sealing effect of the butterfly plate and the sealing seat is insufficient, and the problem of medium leakage exists.

Among the prior art, there is an inflation formula butterfly valve, for example the chinese utility model patent of publication No. CN104806771A, it discloses a pneumatic inflation formula butterfly valve, including the valve body, the valve plate, valve rod and the executor of setting in butterfly body top are provided with the valve plate of separation fluid channel in the fluid channel of valve body, and the valve plate passes through the valve rod to be connected with the executor transmission, still is provided with the resilient valve seat that closely contacts with the valve plate or separate when the fluid channel is disconnected in the valve plate separation in the fluid channel, be equipped with the cavity between resilient valve seat and the valve body, the cavity passes through the pipe connection in the connect output of the modular process control valve that the valve body set up outward, and the incoming end rethread pipeline of modular process control valve links to each other with the control valve, the executor also links to each other with the control valve through pipeline, and the.

In this patent, it is an elastic valve seat which is in close contact with a valve plate (butterfly plate) and performs a sealing function, but the elastic valve seat is easily detached from or displaced from the valve body after being deformed and impacted, so that it cannot be well used in cooperation with the valve plate, resulting in improper use of the butterfly valve.

SUMMERY OF THE UTILITY MODEL

To the problem that the easy relative valve body of elasticity disk seat shifted and drops in the inflation formula butterfly valve that prior art exists, the utility model aims to provide a novel pneumatic inflation butterfly valve.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a novel pneumatic expansion butterfly valve comprises a valve body, a valve rod, a butterfly plate, an actuating mechanism and an elastic expansion valve seat, wherein the elastic expansion valve seat is cylindrical, the circumferential outer wall of the elastic expansion valve seat is matched with the inner wall of the valve body, and the circumferential inner wall of the elastic expansion valve seat is matched with the butterfly plate; annular flanges are arranged at two ends of the circumferential outer wall of the elastic expansion valve seat, annular step grooves matched with the annular flanges are arranged at two ends of the valve body, and the annular flanges are fixed on the annular step grooves through screws; an annular limiting convex ring is arranged on the circumferential outer wall of the elastic expansion valve seat, and a limiting groove matched with the annular limiting convex ring is arranged on the inner wall of the valve body; the elastic expansion valve comprises a valve body and is characterized in that a through hole matched with the valve rod is formed in the circumferential side wall of the elastic expansion valve seat, an annular ventilation groove is formed in the inner wall of the valve body, the annular ventilation groove and the axis of the valve rod are in the same plane, an inflation connector and an air exhaust connector are arranged on the outer wall of the valve body, and the inflation connector and the air exhaust connector are communicated with the annular ventilation groove.

Preferably, the number of the limiting convex rings is a plurality, and the limiting convex rings are symmetrically arranged on two sides of the annular ventilation groove.

Further, a sealing sleeve is fixedly installed in the through hole, and a sealing ring is arranged between the sealing sleeve and the valve rod.

Preferably, the screw connected between the annular flange and the annular step groove is a countersunk head screw or an inner hexagonal screw.

Preferably, the cross section of the annular vent groove is arc-shaped or semicircular.

By adopting the technical scheme, the annular flange on the elastic expansion valve seat, the annular step groove on the valve body and the screw for connecting the annular flange and the annular step groove are arranged, so that the elastic expansion valve seat can be stably connected to the valve body, the situation that the elastic expansion valve seat falls off is ensured no matter how the butterfly plate and a fluid medium are disturbed, and the outstanding annular flange does not influence the connection and installation of the valve body; due to the arrangement of the limiting convex ring on the circumferential outer wall of the elastic expansion valve seat and the corresponding limiting groove on the valve body, the elastic expansion valve seat can be stably limited at a specified position, and the situation of the deviation of the elastic expansion valve seat caused by the disturbance of the butterfly plate and the fluid medium can be effectively prevented; the annular ventilation groove and the axis of the valve rod are arranged in the same plane, so that the deformation part of the elastic expansion valve seat can be opposite to the butterfly plate, and the elastic expansion valve seat is ensured to be in sealing contact and separated from the contact butterfly plate with minimum and most effective deformation; the setting of the air inflation interface and the air exhaust interface on the outer wall of the valve body enables the elastic expansion valve seat to make quick and effective response during sealing and through-flow.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the elastically expandable valve seat of the present invention taken along line A-A of FIG. 1;

fig. 3 is a cross-sectional view of the valve body of the present invention along the line B-B in fig. 1.

In the figure, 1-valve body, 11-supporting part, 12-annular ventilation groove, 13-inflation interface, 14-air extraction interface, 15-flange hole, 2-valve rod, 3-butterfly plate, 4-actuating mechanism, 5-elastic expansion valve seat, 6-annular flange, 7-annular step groove, 8-annular limiting convex ring, 9-limiting groove and 10-through hole.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a designated orientation, be constructed and operated in the designated orientation, and thus, should not be construed as limiting the present invention.

In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.

As shown in fig. 1-3, a novel pneumatic expansion butterfly valve comprises a valve body 1, a valve rod 2, a butterfly plate 3 and an actuating mechanism 4, wherein the valve body 1 is integrally cylindrical, and two end faces in the axial direction of the valve body are provided with flange holes 15 for connection; a supporting part 11 is fixed on the circumferential side wall of the valve body 1, the actuating mechanism 4 is fixedly arranged on the supporting part 11, and the valve rod 2 penetrates through the supporting part 11, one end of the valve rod is fixedly connected with the butterfly plate 3 in the valve body 1, and the other end of the valve rod is mechanically connected with the actuating mechanism 4. The support member 11 is preferably a generally hollow sleeve within which the valve stem 2 is rotatably (bearing or clearance fit) attached with a sealing ring seal disposed therebetween. The actuator 4 is typically a pneumatic actuator, which rotates the valve rod 2 through a rack and pinion mechanism to rotate the butterfly plate 3, so as to open and close the valve body 1.

In this embodiment, still include elastic expansion disk seat 5, elastic expansion disk seat 5 is whole to be cylinder tube-shape and cover and establish in valve body 1, and elastic expansion disk seat 5's circumference outer wall and valve body 1's inner wall looks adaptation (laminating mutually), elastic expansion disk seat 5's circumference inner wall and the circumference outer fringe looks adaptation of butterfly plate 3 (the inner wall diameter of the preferred elastic expansion disk seat 5 of this embodiment slightly is greater than the diameter of butterfly plate 3).

The both ends of 5 circumference outer walls of elasticity inflation disk seat all are provided with outside (the direction that deviates from 5 axes of elasticity inflation disk seat) convex annular flange 6, and correspondingly, the both ends of the inner wall of valve body 1 all are provided with the annular step recess 7 with annular flange 6 looks adaptation, and annular flange 6 passes through the fix with screw on annular step recess 7, and this screw is preferred is countersunk screw or interior hex head screw. So set up, on the one hand make the connection that elasticity inflation valve seat 5 can be stable on valve body 1, guarantee no matter how disturbance of butterfly plate 3 and fluid medium can not take place the condition that elasticity inflation valve seat 5 drops, on the other hand also makes outstanding annular flange 6 not cause the influence to the connection installation of valve body 1 (do not influence the connection of flange on the valve body 1 both ends promptly).

An annular limiting convex ring 8 is further arranged on the circumferential outer wall of the elastic expansion valve seat 5, and a limiting groove 9 matched with the annular limiting convex ring 8 is formed in the inner wall of the valve body 1. By the arrangement, the elastic expansion valve seat 5 can be stably limited at a specified position, and the situation that the elastic expansion valve seat 5 deviates due to disturbance of the butterfly plate 3 and fluid media can be effectively prevented.

In this embodiment, a through hole 10 adapted to the valve rod 2 is provided on a circumferential side wall of the elastic expansion valve seat 5, and the through hole 10 is used for the valve rod 2 to pass through. Meanwhile, an annular ventilation groove 12 is formed in the inner wall of the valve body 1, and the annular ventilation groove 12 and the axis of the valve rod 2 are in the same plane. And, the outer wall of the valve body 1 is provided with an inflation interface 13 and an air exhaust interface 14, and the inflation interface 13 and the air exhaust interface 14 are both communicated with the annular ventilation groove 12.

When the butterfly valve is used and needs to seal and cut off fluid media, the butterfly plate 3 is firstly rotated to the position where the axis of the butterfly plate is parallel to the axial direction of the valve body 1 through the actuating mechanism 4, and in the process, as the size of the butterfly plate 3 is slightly smaller than the inner diameter of the elastic expansion valve seat 5, the butterfly plate and the elastic expansion valve seat do not generate friction; when the annular ventilation groove 12 is inflated through the inflation port 13, the elastic expansion valve seat 5 is forced to expand, so that the inner wall of the elastic expansion valve seat abuts against the circumferential outer edge of the butterfly plate 3 to form a seal; when sealing is not needed, the inflation operation is stopped, the annular ventilation groove 12 is evacuated through the evacuation port 14, so that under the action of negative pressure, the elastic expansion valve seat 5 deforms and contracts into the annular ventilation groove 12 (because the elastic expansion valve seat 5 contracts into the annular ventilation groove 12 during evacuation, in another embodiment, the diameter of the butterfly plate 3 is slightly larger than the inner diameter of the elastic expansion valve seat 5), the inner wall of the butterfly plate 3 is separated from contact with the outer edge of the circumference of the butterfly plate 3, and the butterfly plate 3 is driven to rotate through the actuating mechanism 4.

In order to ensure that the elastically expandable valve seat 5 can be retracted better into the annular vent groove 12, the annular vent groove 12 is provided in this embodiment with an arc-shaped or semicircular cross section.

In order to maintain the elastic expansion valve seat 5 with better position stability, in another embodiment, a plurality of limiting convex rings 8, for example two limiting convex rings 8, can be arranged, and the two limiting convex rings 8 are symmetrically arranged at two sides of the annular vent groove 10.

Meanwhile, in order to ensure the sealing effect at the valve rod 2, in another embodiment, a sealing sleeve is fixedly installed in the through hole 10, and a sealing ring is arranged between the sealing sleeve and the valve rod.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a novel pneumatic inflation formula butterfly valve, includes valve body, valve rod, butterfly plate and actuating mechanism, its characterized in that: the butterfly valve further comprises an elastic expansion valve seat, the elastic expansion valve seat is cylindrical, the circumferential outer wall of the elastic expansion valve seat is matched with the inner wall of the valve body, and the circumferential inner wall of the elastic expansion valve seat is matched with the butterfly plate; annular flanges are arranged at two ends of the circumferential outer wall of the elastic expansion valve seat, annular step grooves matched with the annular flanges are arranged at two ends of the valve body, and the annular flanges are fixed on the annular step grooves through screws; an annular limiting convex ring is arranged on the circumferential outer wall of the elastic expansion valve seat, and a limiting groove matched with the annular limiting convex ring is arranged on the inner wall of the valve body; the elastic expansion valve comprises a valve body and is characterized in that a through hole matched with the valve rod is formed in the circumferential side wall of the elastic expansion valve seat, an annular ventilation groove is formed in the inner wall of the valve body, the annular ventilation groove and the axis of the valve rod are in the same plane, an inflation connector and an air exhaust connector are arranged on the outer wall of the valve body, and the inflation connector and the air exhaust connector are communicated with the annular ventilation groove.

2. The new pneumatic expansion butterfly valve according to claim 1, characterized in that: the limiting convex rings are arranged on two sides of the annular ventilation groove symmetrically.

3. The new pneumatic expansion butterfly valve according to claim 1, characterized in that: and a sealing sleeve is fixedly arranged in the through hole, and a sealing ring is arranged between the sealing sleeve and the valve rod.

4. The new pneumatic expansion butterfly valve according to claim 1, characterized in that: the screw connected between the annular flange and the annular step groove is a countersunk head screw or an inner hexagon screw.

5. The new pneumatic expansion butterfly valve according to claim 1, characterized in that: the cross section of the annular ventilation groove is arc-shaped or semicircular.