CN219221330U

CN219221330U - Plastic ball valve sealing structure

Info

Publication number: CN219221330U
Application number: CN202320183575.6U
Authority: CN
Inventors: 肖海斌; 余树桥; 彭新松; 周文愚
Original assignee: Aifei Automotive Parts Wuhan Co ltd
Current assignee: Aifei Automotive Parts Wuhan Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-20
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a plastic ball valve sealing structure, which comprises a valve body shell, wherein a gland is arranged at the upper end of the valve body shell, a spherical valve body is arranged in an inner cavity of the valve body shell, the opening end of the valve body shell is connected with a pipeline, the outer wall of the pipeline is abutted with a main sealing element, the left end of the main sealing element is provided with a spherical-like structure, the inner wall of the spherical-like structure is abutted with the outer wall of the spherical valve body, and the outer wall of the right part of the main sealing element is provided with a sealing rib; the utility model has reasonable structural design, greatly simplifies the structure and reduces the occupied space.

Description

Plastic ball valve sealing structure

Technical Field

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

Background

The plastic ball valve is used as a reversing valve and mainly comprises a valve body, medium input or output pipelines (the medium input or output pipelines are connected with the valve body through a flange plate), a connecting cavity is arranged between the medium input or output pipelines on the valve body, a ball body is arranged in the connecting cavity, and a flow passage for promoting the medium input or output pipelines to be conducted is arranged on the ball body; the valve body is provided with a valve rod which extends into the connecting cavity and is linked with the ball body, and a driving source for driving the valve rod. A sealing valve seat is arranged between the medium inlet pipeline and the medium outlet pipeline and the ball body.

One end of the sealing valve seat is sealed with the outer peripheral surface of the sphere in a fitting way, and the other end of the sealing valve seat is sealed with the medium input or output pipeline in a fitting way. If leakage occurs at the sealing valve seat, the ball valve cannot be used normally. The majority of the current seals are made with PTFE blocks plus springs. The structure is complex, the weight is large, the occupied space is large, and the cost is high. In order to solve the defects of complex structure, high cost, high requirement on the surface precision of the ball valve and poor reliability of the existing mechanism with similar functions. Therefore, we propose a plastic ball valve sealing structure.

Disclosure of Invention

The utility model aims to provide a plastic ball valve sealing structure to overcome the technical problems in the prior art.

In order to achieve the technical purpose and achieve the technical effect, the utility model provides the following technical scheme:

the utility model provides a plastic ball valve seal structure, includes the valve body shell, the gland is installed to the upper end of valve body shell, the inner chamber of valve body shell is equipped with spherical valve body, the open end of valve body shell is connected with the pipeline, the outer wall butt of pipeline has main sealing member, the left end of main sealing member is equipped with imitative spherical structure, imitative spherical structure's inner wall butt spherical valve body outer wall, the outer wall of main sealing member right part is equipped with sealing rib.

Preferably, in a plastic ball valve sealing structure, the sealing rib is composed of five low-level spherical ribs and one high-level spherical rib, the inner wall of the gland and the inner wall of the valve body shell are both provided with pressure relief sealing grooves matched with the high-level spherical ribs, and the inner wall of the valve body shell is provided with secondary sealing grooves matched with the low-level spherical ribs.

Preferably, in the plastic ball valve sealing structure, the lip of the spherical-like structure is provided with a V-shaped groove, and the inner wall of the gland and the inner wall of the valve body shell are both provided with anti-rolling structures matched with the V-shaped groove.

Preferably, in a plastic ball valve seal structure, the surface of the main seal is coated with a PTFE coating.

Preferably, in the plastic ball valve sealing structure, the main sealing piece is made of rubber sealing materials.

The beneficial effects of the utility model are as follows:

1. the utility model has reasonable structural design, and the spring and the supporting structure thereof are omitted, so that only one rubber sealing piece is needed, the structure is greatly simplified, and the occupied space is reduced;

2. in the utility model, the rubber sealing element can be processed through the die, so that the PTFE sealing structure does not need to be machined and molded, the degree of freedom of shape design is large, the sealing element can adapt to different applications, and the cost is reduced;

3. the utility model has the advantages that the elasticity of the rubber is much stronger than that of PTFE, and the rubber can be compatible with tiny convex-concave unevenness on the surface of the ball valve, thereby reducing the processing precision requirement of the spherical surface of the ball valve, further reducing the cost and enabling the selection of the processing mode of the ball valve to be more flexible.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the specific embodiments will be briefly described below, it being obvious that the drawings in the following description are only some examples of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the main seal of the present utility model;

FIG. 3 is a cross-sectional block diagram of a primary seal of the present utility model;

fig. 4 is a schematic view of an assembled structure of the main seal in the present utility model.

In the figure: 1. a valve body housing; 2. a gland; 3. a spherical valve body; 4. a pipe; 5. a main seal; 51. a spherical-like structure; 52. sealing ribs; 53. a V-shaped groove; 521. low-level spherical convex ribs; 522. high-order spherical convex ribs; 6. pressure relief seal groove; 7. a secondary seal groove; 8. and (5) a rolling prevention structure.

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.

Referring to fig. 1-4, the present embodiment is a ball valve sealing structure, including a valve body housing 1, a gland 2 is installed at the upper end of the valve body housing 1, a spherical valve body 3 is disposed in an inner cavity of the valve body housing 1, a pipe 4 is connected to an open end of the valve body housing 1, a main sealing member 5 is abutted to an outer wall of the pipe 4, a ball-like structure 51 is disposed at a left end of the main sealing member 5, an inner wall of the ball-like structure 51 abuts against an outer wall of the spherical valve body 3, and a sealing rib 52 is disposed on an outer wall of a right portion of the main sealing member 5, so that friction is reduced while sealing is ensured.

The sealing rib 52 is composed of five low-level spherical ribs 521 and one high-level spherical rib 522, the pressure relief sealing grooves 6 matched with the high-level spherical ribs 522 are formed in the inner wall of the pressing cover 2 and the inner wall of the valve body shell 1, the secondary sealing grooves 7 matched with the low-level spherical ribs 521 are formed in the inner wall of the valve body shell 1, multiple sealing layers are arranged on the same sealing surface, a pressure relief sealing structure is arranged, sealing performance is enhanced, and sealing is more reliable.

The V-shaped groove 53 is formed in the lip of the spherical-like structure 51, so that the lip is prevented from rolling due to friction, sealing failure and ball valve clamping stagnation are prevented, and the rolling prevention structures 8 matched with the V-shaped groove 53 are arranged on the inner wall of the gland 2 and the inner wall of the valve body shell 1.

The surface of the main sealing element 5 is coated with a PTFE coating, so that the lubrication and durability are ensured, the friction is further reduced, the occurrence of rolling is prevented, and the service life is prolonged.

The main sealing piece 5 is made of rubber sealing materials, and is convenient to seal through special structural design by utilizing the traditional rubber sealing materials, and the structure is simplified by utilizing the elastic compressible characteristic of rubber, so that the spring and the supporting structure thereof are avoided.

The specific implementation mode of the utility model is as follows:

when the device is used, the spherical imitation structure 51 and the sealing ribs 52 are arranged on the main sealing piece 5, and the first dynamic sealing can be realized by matching the spherical imitation structure 51 and the sealing ribs 52 with the spherical valve body 3;

then, by arranging static sealing ribs 52 on the cylindrical surface at the outlet as a second seal, reliable seal is realized, multiple seals are arranged on the same sealing surface, and a pressure relief sealing structure is arranged, so that the sealing performance is enhanced, and the seal is more reliable; meanwhile, a V-shaped groove 53 is designed on the lip of the spherical-like structure 51, so that the lip is prevented from being curled due to friction, and sealing failure and ball valve clamping stagnation are prevented.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The utility model provides a plastic ball valve seal structure, includes valve body shell (1), its characterized in that: gland (2) are installed to the upper end of valve body shell (1), the inner chamber of valve body shell (1) is equipped with spherical valve body (3), the open end of valve body shell (1) is connected with pipeline (4), the outer wall butt of pipeline (4) has main sealing member (5), the left end of main sealing member (5) is equipped with imitative spherical structure (51), the inner wall butt spherical valve body (3) outer wall of imitative spherical structure (51), the outer wall at main sealing member (5) right part is equipped with sealing rib (52).

2. The plastic ball valve sealing structure according to claim 1, wherein: the sealing rib (52) is composed of five low-level spherical ribs (521) and one high-level spherical rib (522), pressure relief sealing grooves (6) matched with the high-level spherical ribs (522) are formed in the inner wall of the gland (2) and the inner wall of the valve body shell (1), and secondary sealing grooves (7) matched with the low-level spherical ribs (521) are formed in the inner wall of the valve body shell (1).

3. The plastic ball valve sealing structure according to claim 1, wherein: the lip of imitative spherical structure (51) has seted up V-arrangement groove (53), gland (2) inner wall and valve body shell (1) inner wall all are equipped with and prevent rolling up structure (8) with V-arrangement groove matched with.

4. The plastic ball valve sealing structure according to claim 1, wherein: the surface of the main seal (5) is coated with a PTFE coating.

5. The plastic ball valve sealing structure according to claim 1, wherein: the main sealing piece (5) is made of rubber sealing materials.