CN215293642U

CN215293642U - Adjustable specific pressure piston type two-way sealing three-eccentric butterfly valve

Info

Publication number: CN215293642U
Application number: CN202121851067.8U
Authority: CN
Inventors: 王雪珂
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-12-24
Anticipated expiration: 2031-08-06

Abstract

The utility model belongs to the technical field of valve equipment, specifically discloses an adjustable specific pressure piston type two-way sealing three-eccentric butterfly valve, which comprises a sealing ring, wherein the sealing ring is arranged between a butterfly plate and a pressing ring and a snap ring, the snap ring is arranged in a first groove in a valve body, the snap ring is connected with an annular valve seat through a connecting screw and a set screw, the valve seat and the snap ring are coaxial, the inner wall of the valve seat is arranged as a sealing surface matched with the sealing ring, and a reciprocating type dynamic sealing structure is arranged between the valve seat and the inner wall of the valve body; this device is through dismantling the change disk seat promptly removable sealed vice that warp, and through twisting the screw with the clearance between adjustment snap ring and the disk seat, change sealed specific pressure between the sealed face on sealing washer and the disk seat, and then the sealed precision between adjustable disk seat and the sealing washer, adjust sealed vice sealed precision promptly to need not the subassembly of high accuracy production processing sealed vice, reduction in production cost, and change the maintenance efficiency height.

Description

Adjustable specific pressure piston type two-way sealing three-eccentric butterfly valve

Technical Field

The utility model belongs to the technical field of valve equipment's technique and specifically relates to an adjustable specific pressure piston two way seal three eccentric butterfly valves.

Background

The existing triple eccentric butterfly valve containing a bidirectional sealing structure has the defect that the specific pressure of a butterfly valve sealing pair is not adjustable, and a gap is generated after the sealing pair deforms, so that the sealing pair leaks. The sealing between the sealing parts is difficult to ensure by replacing the sealing pair, the sealing can be ensured only by high processing precision, the processing period is long, the economic cost is high, and the large-scale production is not suitable.

With the continuous improvement of the technology and the continuous improvement of the requirement of customers on the product quality, the requirements of users of the butterfly valve on the bidirectional sealing and the replacement of a sealing pair are increased, and the butterfly valve is necessary to improve the design and manufacturing technology of the triple eccentric butterfly plate in order to reduce the manufacturing cost and adapt to the market competition.

SUMMERY OF THE UTILITY MODEL

Problem to among the prior art, the utility model aims at providing an adjustable ratio pressure piston two way seal three eccentric butterfly valve solves the problem of changing sealed pair with high costs, need not high accuracy processing, reduction in production cycle.

In order to achieve the above purpose, the utility model discloses a technical scheme is:

the design is an adjustable pressure-ratio piston type two-way sealing three-eccentric butterfly valve, which comprises a sealing ring, wherein the sealing ring is arranged between a butterfly plate and a pressing ring and is clamped by a clamping ring, a first groove in a valve body is arranged on the clamping ring, the clamping ring is connected with an annular valve seat through a connecting screw, the head end of a set screw on the clamping ring is abutted against the end face of the valve seat, the valve seat is coaxial with the clamping ring, the inner wall of the valve seat is arranged to be a sealing surface matched with the sealing ring, and a reciprocating type dynamic sealing structure is arranged between the inner wall of the valve seat and the inner wall of the valve body.

Further, the reciprocating type movable sealing structure comprises a second groove arranged on the outer wall of the valve seat, and an O-shaped ring is filled in the second groove.

Further, the number of the second grooves is at least 1.

Further, the inner wall of the valve body is provided with a check ring formed by an annular bulge, and the check ring is used for limiting the valve seat.

Further, the width of the first groove is larger than that of the part, inserted into the first groove, of the clamping ring.

Further, the seal surface is formed as an inclined surface.

The utility model has the beneficial technical effects that:

compared with the prior art, the utility model provides a pair of adjustable pressure ratio piston type two-way seal three eccentric butterfly valve structure is distinctive, high durability and convenient operation, change the disk seat through dismantling and be removable the sealed vice that warp promptly, and through twisting the clearance of moving the screw between with adjustment snap ring and disk seat, change sealed pressure ratio between the sealed face on sealing washer and the disk seat, and then the sealed precision between adjustable disk seat and the sealing washer, adjust sealed vice sealed precision promptly, thereby need not the sealed vice subassembly of high accuracy production and processing, the production cost is reduced, and it is high to change the maintenance efficiency.

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 diagram of a piston-type bidirectional sealing triple-eccentric butterfly valve with adjustable specific pressure.

In the figure: 1. a valve body, 2 a valve seat, 3 an O-shaped ring, 4 a first groove, 5 a snap ring,

6. the connecting bolt, 7, the butterfly plate, 8, the sealing ring, 9, the pressing ring and 10, the set bolt.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and 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.

Examples

As shown in fig. 1, the adjustable specific pressure piston type bidirectional sealing triple offset butterfly valve according to a preferred embodiment of the present invention comprises a sealing ring 8, wherein the sealing ring 8 is installed between a butterfly plate 7 and a pressing ring 9 and a snap ring 5, the snap ring 5 is installed in a first groove 4 in a valve body 1, the snap ring 5 is connected to an annular valve seat 2 through a connecting screw 6 and a tightening screw 10, specifically, the connecting screw 6 is connected to a threaded hole on the valve seat 2, a head end of the tightening screw 10 abuts against an end surface of the valve seat 2, so as to adjust and lock a gap between the snap ring 5 and the valve seat 2, the valve seat 2 and the snap ring 5 are coaxial, wherein an inner wall of the valve seat 2 is provided with a sealing surface matched with the sealing ring 8, specifically, the sealing surface is provided with an inclined surface, a reciprocating type dynamic sealing structure is provided between the valve seat 2 and an inner wall of the valve body 1, and after the position of the valve seat 2 is adjusted through reciprocating type dynamic sealing, the seal between the valve seat 2 and the valve body 1 corresponds to a piston seal.

Use the utility model provides an during adjustable specific pressure piston two way seal three eccentric butterfly valves, change disk seat 2 through dismantling and to change the sealed pair of deformation, and through twisting the clearance of screw 6 between with adjustment snap ring 5 and disk seat 2, change sealed specific pressure between the sealed face on sealing washer 8 and the disk seat 2, and then the sealed precision between adjustable disk seat 2 and the sealing washer 8, adjust sealed vice sealed precision promptly, thereby need not the sealed vice subassembly of high accuracy production and processing, the production cost is reduced, and it is high to change the maintenance efficiency.

It should be noted that the above-mentioned sealing pair includes the sealing ring 8 and the valve seat 2, and is common knowledge in the art.

On the basis of the above embodiment, the reciprocating type dynamic sealing structure comprises a second groove arranged on the outer wall of the valve seat 2, the second groove is filled with the O-ring 3, and the gap between the outer wall of the valve seat 2 and the inner wall of the valve body 1 is sealed through the O-ring 3.

More specifically, in this embodiment, the number of the second grooves is set to 2, so that the sealing performance is improved, and the sealing failure caused by the damage of one of the O-rings 3 is effectively prevented.

On the basis of the above embodiment, the inner wall of the valve body 1 is provided with the retaining ring formed by the annular protrusion, the retaining ring is used for limiting the valve seat 2, limiting the axial movement range of the valve seat 2, avoiding the separation of the valve seat 2 and the snap ring 5 when the screw 6 fails, and separating the valve seat 2 from the valve body 1 on the side away from the snap ring 5.

On the basis of the above embodiment, the width of the first groove 4 is greater than the width of the part of the snap ring 5 inserted into the first groove 4, so that when reverse sealing is performed, the medium pushes the valve seat 2 to move in a piston manner and the sealing ring 8 is pressed to perform sealing, so as to ensure that the higher the medium pressure is, the higher the sealing specific pressure is, the better the reverse sealing performance is, and it should be noted that the difference h between the width of the first groove 4 and the width of the part of the snap ring 5 inserted into the first groove 4 needs to be set according to actual conditions.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "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.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides an adjustable ratio pressure piston type two way seal three eccentric butterfly valve, includes the sealing washer, the sealing washer is installed between butterfly plate and clamping ring, and its characterized in that still includes the snap ring, the first slot in the valve body is installed to the snap ring, the snap ring has annular disk seat through connecting screw connection, just the head end of holding screw on the snap ring is contradicted with the terminal surface of disk seat, disk seat and snap ring are coaxial, wherein the inner wall of disk seat establish into with sealing washer complex sealed face, just be equipped with reciprocating type between the inner wall of disk seat and valve body and move seal structure.

2. The adjustable specific pressure piston type bidirectional sealing triple offset butterfly valve according to claim 1, wherein the reciprocating dynamic sealing structure comprises a second groove provided on the outer wall of the valve seat, and the second groove is filled with an O-ring.

3. The variable specific pressure piston-type bidirectional sealing triple offset butterfly valve according to claim 2, wherein the number of the second grooves is at least 1.

4. The adjustable specific pressure piston type bidirectional sealing triple eccentric butterfly valve according to claim 1, wherein the inner wall of the valve body is provided with a retainer ring formed by an annular protrusion, and the retainer ring is used for limiting the valve seat.

5. The adjustable specific pressure piston type bidirectional sealing triple offset butterfly valve according to claim 4, wherein the width of the first groove is larger than the width of the portion of the snap ring inserted into the first groove.

6. The variable specific pressure piston type bidirectional sealing triple offset butterfly valve according to claim 1, wherein the sealing surface is provided as a slope.