CN220646799U

CN220646799U - High stability butterfly valve

Info

Publication number: CN220646799U
Application number: CN202322409336.0U
Authority: CN
Inventors: 陈孙强; 王军雄
Original assignee: Yichuang Valve Technology Co ltd
Current assignee: Yichuang Valve Technology Co ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-03-22
Anticipated expiration: 2033-09-05

Abstract

The utility model belongs to the technical field of butterfly valves, and particularly relates to a high-stability butterfly valve; comprising the following steps: the valve body assembly is provided with a valve rod assembly; the elastic valve seat is axially sleeved in the valve body assembly, the outer peripheral wall of the elastic valve seat is abutted against the inner peripheral wall of the valve body assembly, and the inner peripheral wall of the elastic valve seat is provided with an arc concave surface; the valve rod assembly penetrates through the elastic valve seat and is connected with the valve disc, two arc-shaped convex rings are arranged on the peripheral wall of the valve disc, and the arc-shaped convex rings are used for abutting against the arc-shaped concave surfaces to seal; the two arc convex rings are abutted against the arc concave surfaces through the rotation of the valve disc in the elastic valve seat, so that the pressure of the circumferential surface of the valve disc on the arc concave surfaces is more uniform when the valve disc rotates, the tightness between the valve disc and the valve rod assembly is improved, and the torque when the valve disc is opened or closed is reduced.

Description

High stability butterfly valve

Technical Field

The utility model belongs to the technical field of butterfly valves, and particularly relates to a high-stability butterfly valve.

Background

The butterfly valve is characterized in that a valve rod is utilized to enable a valve disc to rotate in a valve seat, so that the circumferential surface of the valve disc is abutted against or separated from the inner circumferential wall of the valve seat, thereby achieving the function of intercepting or flowing a medium.

In the prior art, when the valve disc rotates, the circumferential surface of the valve disc is abutted against the inner circumferential wall of the valve seat to generate frictional resistance, and when the valve disc rotates, the inner circumferential wall of the valve seat is extruded by the circumferential surface of the valve disc, so that uneven pressure causes overlarge friction between the valve seat and the valve disc, and meanwhile, the valve seat is easy to wear, thereby affecting the tightness of the butterfly valve and increasing the rotation torque of the valve rod.

Disclosure of Invention

The utility model aims at solving the technical problems, and provides a high-stability butterfly valve, which enables two arc-shaped convex rings to be abutted against an arc-shaped concave surface through the rotation of a valve disc in an elastic valve seat, so that the pressure of the circumferential surface of the valve disc on the arc-shaped concave surface is more uniform when the valve disc rotates, the tightness between the valve disc and a valve rod assembly is improved, and the torque when the valve disc is opened or closed is reduced.

In view of this, the present utility model provides a high stability butterfly valve, comprising:

the valve body assembly is provided with a valve rod assembly;

the elastic valve seat is axially sleeved in the valve body assembly, the outer peripheral wall of the elastic valve seat is abutted against the inner peripheral wall of the valve body assembly, and the inner peripheral wall of the elastic valve seat is provided with an arc concave surface;

the valve disc is arranged in the elastic valve seat, the valve rod assembly penetrates through the elastic valve seat and is connected with the valve disc, two arc-shaped convex rings are arranged on the peripheral wall of the valve disc, and the arc-shaped convex rings are used for abutting against the arc-shaped concave surfaces to seal.

In the above-described scheme, further,

in the above aspect, further, the valve body assembly includes:

the upper valve body is symmetrically provided with two first connecting lugs on the peripheral wall;

the lower valve body is symmetrically provided with two second connecting lugs on the peripheral wall, and the first connecting lugs are connected to the second connecting lugs.

In the above aspect, further, the valve stem assembly includes:

the upper valve rod is rotationally connected to the upper valve body;

the lower valve rod is coaxial with the upper valve rod and is rotationally connected to the lower valve body;

wherein, the valve disc is last to be symmetrically to be provided with two valve rod mount pad, and upper valve rod and lower valve rod are inserted respectively and are located in the valve rod mount pad.

In the above-mentioned scheme, further, be equipped with the first shaft hole that is used for installing valve rod assembly on the valve body subassembly, be equipped with the second shaft hole that supplies valve rod assembly to pass on the elastic valve seat, all overlap on upper valve rod and the lower valve rod and be equipped with disk seat wear-resisting cover, disk seat wear-resisting cover includes:

the outer peripheral wall of the annular part is abutted against the inner peripheral wall of the second shaft hole, and annular gaps are formed between the inner peripheral wall of the annular part and the upper valve rod and between the inner peripheral wall of the annular part and the lower valve rod;

the flange part is connected to one end of the annular part, a limiting ring groove is arranged in the first shaft hole, and the flange part is arranged in the limiting ring groove.

In the above scheme, further, be provided with in the first shaft hole and contradict respectively in flange portion terminal surface and valve rod assembly peripheral wall's sealing washer.

In the above scheme, further, be formed with annular cavity between first shaft hole and the upper valve rod, annular cavity is interior from last sealing sleeve, packing, first spring, sealing bearing and the second spring of having set gradually down.

In the above scheme, further, the first spring both ends and the second spring both ends are provided with annular gasket.

In the above scheme, further, valve body subassembly both ends face is provided with the joint groove, and elasticity disk seat both ends symmetry is provided with the spacing portion of joint in the joint groove.

In the above scheme, further, the valve body assembly is provided with a positioning part.

The beneficial effects of the utility model are as follows:

1. when the valve disc is closed, the arc concave surface is extruded by the arc convex ring, so that the pressure of the valve disc when the valve disc is abutted against the elastic valve seat is uniform, meanwhile, the friction force between the elastic valve seat and the valve disc is reduced, the abrasion of the elastic valve seat is reduced, the tightness of the butterfly valve is improved, the stability of the butterfly valve is enhanced, and the torque of the valve rod when the valve rod rotates is reduced.

2. The valve body assembly is detachable and is formed by splicing an upper valve body and a lower valve body, the first connecting lug is connected to the second connecting lug through a screw, and the valve rod assembly, the elastic valve seat and the valve disc are convenient to install or detach due to the detachable structure;

3. the first spring is compressed and arranged in the annular cavity, when the packing is worn, the packing is extruded through elastic deformation by the first spring, the packing is kept to be abutted against the upper valve rod, and the sealing effect of the packing is guaranteed.

Drawings

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

FIG. 2 is a schematic diagram of an exploded construction of the present utility model;

FIG. 3 is a schematic top sectional view of the present utility model;

FIG. 4 is a schematic elevational cross-sectional view of the present utility model;

FIG. 5 is a schematic side sectional view of the present utility model;

FIG. 6 is a schematic view of the partial structure of FIG. 3 at A in accordance with the present utility model;

fig. 7 is a schematic view of the partial structure of fig. 3 at B of the present utility model.

The label in the figure is:

1. a valve body assembly; 11. an upper valve body; 12. a lower valve body; 2. a valve stem assembly; 21. an upper valve rod; 22. a lower valve rod; 3. an elastic valve seat; 31. an arc-shaped concave surface; 4. a valve disc; 41. an arc-shaped convex ring; 42. a valve rod mounting seat; 5. a first connection lug; 6. a second connecting ear; 7. a first shaft hole; 8. a second shaft hole; 9. wear-resistant sleeve of valve seat; 91. an annular portion; 92. a flange portion; 10. an annular gap; 13. a limit ring groove; 14. a seal ring; 15. an annular cavity; 16. sealing the shaft sleeve; 17. a filler; 18. a first spring; 19. sealing the bearing; 20. a second spring; 23. an annular gasket; 24. a clamping groove; 25. a limit part; 26. and a positioning part.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Example 1:

the embodiment provides a high stability butterfly valve, including:

the valve body assembly 1, the valve body assembly 1 is provided with a valve rod assembly 2;

the elastic valve seat 3 is axially sleeved in the valve body assembly 1, the outer peripheral wall of the elastic valve seat 3 is abutted against the inner peripheral wall of the valve body assembly 1, and the inner peripheral wall of the elastic valve seat 3 is provided with an arc concave surface 31;

the valve disc 4 is arranged in the elastic valve seat 3, the valve rod assembly 2 penetrates through the elastic valve seat 3 and is connected with the valve disc 4, two arc-shaped convex rings 41 are arranged on the peripheral wall of the valve disc 4, and the arc-shaped convex rings 41 are used for abutting against the arc-shaped concave surfaces 31 to seal.

In this technical solution, the valve body component 1 may be made of metal, such as stainless steel or cast steel, the elastic valve seat 3 may be made of material with elastic effect, such as silicone rubber or nitrile rubber, and the valve disc 4 may be made of stainless steel according to the type of medium.

When the valve rod assembly 2 is rotated, the driving piece is arranged at the top end of the valve rod assembly 2 to drive the valve rod assembly 2 to rotate, such as a handle, a motor and a pneumatic actuator, and the driving piece is started to drive the valve disc 4 to reciprocate in the elastic valve seat 3 by 90 degrees, so that the function of controlling the butterfly valve to be opened and closed is achieved.

When the butterfly valve is in an open state, a circulation gap is reserved between the valve disc 4 and the elastic valve seat 3, a medium passes through the elastic valve seat 3 of the butterfly valve from an external pipeline, when the butterfly valve needs to be closed, the circulation gap between the valve disc 4 and the elastic valve seat 3 is smaller and smaller in the rotation process of the valve rod assembly 2, when two arc convex rings 41 are close to the inner peripheral wall of the elastic valve seat 3, the arc convex rings 41 close to the arc concave surfaces 31 are firstly abutted against the arc concave surfaces 31, the arc concave surfaces 31 are extruded by the arc convex rings 41, wherein the section shape of the arc concave surfaces 31 is a circular arc line taking the valve rod assembly 2 as an axis, so that the pressure when the valve disc 4 is abutted against the elastic valve seat 3 is uniform, the problem that the partial excessive extrusion and stress concentration of the inner peripheral wall of the valve disc 4 and the inner peripheral wall of the elastic valve seat 3 of the traditional butterfly valve are caused, and the friction force between the elastic valve seat 3 is reduced, the abrasion of the elastic valve seat 3 is reduced, the sealing performance is improved, the stability of the butterfly valve is enhanced, and torque when the butterfly valve is rotated is reduced, and more labor is saved when the butterfly valve is used.

Example 2:

the present embodiment provides a high-stability butterfly valve having the following technical features in addition to the technical scheme including the above embodiment.

The valve body assembly 1 includes:

the upper valve body 11 is symmetrically provided with two first connecting lugs 5 on the peripheral wall;

the lower valve body 12 is symmetrically provided with two second connecting lugs 6 on the outer peripheral wall, and the first connecting lugs 5 are connected to the second connecting lugs 6.

In this technical scheme, valve body subassembly 1 is detachable, by last valve body 11 and lower valve body 12 concatenation form, connect first engaging lug 5 on second engaging lug 6 through the screw between the two, detachable structure easy to assemble or dismantle valve rod subassembly 2, elasticity disk seat 3 and valve disc 4, when valve body subassembly 1 damages moreover, only need with the last valve body 11 of damage or lower valve body 12 change down can, resources are saved and cost.

Example 3:

The valve stem assembly 2 includes:

an upper valve stem 21 rotatably connected to the upper valve body 11;

a lower valve rod 22 coaxially connected to the upper valve rod 21 and rotatably connected to the lower valve body 12;

wherein, two valve rod mounting seats 42 are symmetrically arranged on the valve disc 4, and the upper valve rod 21 and the lower valve rod 22 are respectively inserted into the valve rod mounting seats 42.

In this technical scheme, upper valve rod 21 and lower valve rod 22 are coaxial, thereby upper valve rod 21 rotates and makes lower valve rod 22 rotate, all is provided with the spacing groove in the one end of upper valve rod 21 and lower valve rod 22, is provided with the spacing hole in the valve rod mount pad 42, and the one end that has the spacing groove is inserted and is established in valve rod mount pad 42, makes upper valve rod 21 drive valve disc 4 and rotates, and wherein the spacing hole of valve rod mount pad 42 is coaxial with upper valve rod 21 and lower valve rod 22.

Example 4:

Be equipped with the first shaft hole 7 that is used for installing valve rod assembly 2 on the valve body assembly 1, be equipped with the second shaft hole 8 that supplies valve rod assembly 2 to pass on the elastic valve seat 3, all overlap on upper valve rod 21 and the lower valve rod 22 and be equipped with disk seat wear-resisting cover 9, disk seat wear-resisting cover 9 includes:

an annular portion 91, an outer peripheral wall of the annular portion 91 abutting against an inner peripheral wall of the second shaft hole 8, an annular gap 10 being formed between the inner peripheral wall of the annular portion 91 and both the upper stem 21 and the lower stem 22;

the flange 92 is connected to one end of the annular portion 91, the first shaft hole 7 is provided with a limiting ring groove 13, and the flange 92 is disposed in the limiting ring groove 13.

In this technical scheme, disk seat wear-resistant sleeve 9 is used for preventing the second shaft hole 8 of valve rod subassembly 2 wearing and tearing elasticity disk seat 3, simultaneously can also avoid water pressure or lead to elastic disk seat 3 deformation or shift to lead to the rotation frictional force between upper valve rod 21 or lower valve rod 22 and the second shaft hole 8 for a long time, the outer perisporium of annular portion 91 is contradicted with the inner perisporium of second shaft hole 8, all be formed with annular gap 10 between the inner perisporium of annular portion 91 and upper valve rod 21 and lower valve rod 22, avoid the friction between upper valve rod 21 or lower valve rod 22 and annular portion 91, prevent wearing and tearing upper valve rod 21 or lower valve rod 22, flange portion 92 is used for fixing a position disk seat wear-resistant sleeve 9, prevent it from droing.

Example 5:

The first shaft hole 7 is internally provided with a sealing ring 14 respectively abutting against the end face of the flange 92 and the outer peripheral wall of the valve rod assembly 2.

In the present embodiment, the seal ring 14 is used for sealing the gaps between the annular portion 91 and the upper valve stem 21 and between the annular portion 91 and the lower valve stem 22, so as to prevent the medium from flowing into the first shaft hole 7, and damage the upper valve stem 21 or the lower valve stem 22.

Example 6:

An annular cavity 15 is formed between the first shaft hole 7 and the upper valve rod 21, and a sealing shaft sleeve 16, a filler 17, a first spring 18, a sealing bearing 19 and a second spring 20 are sequentially arranged in the annular cavity 15 from top to bottom.

In the technical proposal, a sealing shaft sleeve 16 is rotationally connected with an upper valve rod 21 and is used for preventing external sundries from entering an annular cavity 15; the packing 17 may be polytetrafluoroethylene, and is used for sealing the annular cavity 15 to prevent leakage of the medium; the first spring 18 is arranged in the annular cavity 15 in a compressed mode, when the packing 17 is worn, the packing 17 is extruded through elastic deformation by the first spring 18, the packing 17 is kept against the upper valve rod 21, and the sealing effect of the packing 17 is guaranteed; the sealing bearing 19 is sleeved and rotationally connected on the upper valve rod 21 and is used for positioning the upper valve rod 21 to ensure the coaxiality of the upper valve rod 21 and the first shaft hole 7; the second spring 20 is used for limiting the sealing ring 14 and the valve seat anti-abrasion sleeve 9, and preventing the sealing ring 14 and the valve seat anti-abrasion sleeve 9 from axially shifting along the upper valve rod 21.

Example 7:

Annular gaskets 23 are provided at both ends of the first spring 18 and at both ends of the second spring 20.

In this solution, annular gaskets 23 are used to provide bearing surfaces for the ends of the first spring 18 and the ends of the second spring 20, while preventing the filler 17 from leaking into the annular cavity 15 in which the first spring 18 is located.

Example 8:

The two end faces of the valve body assembly 1 are provided with clamping grooves 24, and two ends of the elastic valve seat 3 are symmetrically provided with limiting parts 25 which are clamped in the clamping grooves 24.

In this technical scheme, the spacing portion 25 of joint in joint groove 24 can prevent that elasticity disk seat 3 from receiving external force to influence and causing the aversion, improves the stability of disk seat, and spacing portion 25 still is used for the sealing between external pipeline and the butterfly valve, prevents that the medium from revealing.

Example 9:

The valve body assembly 1 is provided with a positioning part 26.

In the technical scheme, the positioning part 26 is used for fixing and positioning when the butterfly valve is connected with an external pipeline, and the positioning part 26 is fixedly connected with the external pipeline through a screw, wherein the positioning part 26 can be in the form of a butt clamp type, a supporting lug type or a flange type.

The embodiments of the present application and the features of the embodiments may be combined without conflict, and the present application is not limited to the specific embodiments described above, which are merely illustrative, not restrictive, and many forms may be made by those of ordinary skill in the art, without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A high stability butterfly valve, comprising:

the valve comprises a valve body assembly (1), wherein a valve rod assembly (2) is arranged on the valve body assembly (1);

the elastic valve seat (3) is axially sleeved in the valve body assembly (1), the outer peripheral wall of the elastic valve seat (3) is abutted against the inner peripheral wall of the valve body assembly (1), and the inner peripheral wall of the elastic valve seat (3) is provided with an arc-shaped concave surface (31);

valve disc (4) set up in elasticity disk seat (3), valve rod assembly (2) run through elasticity disk seat (3) and are connected with valve disc (4), be provided with two arc bulge loop (41) on the periphery wall of valve disc (4), arc bulge loop (41) are used for contradicting with arc concave surface (31) and seal.

2. A high stability butterfly valve according to claim 1, wherein the valve body assembly (1) comprises:

the upper valve body (11) is symmetrically provided with two first connecting lugs (5) on the peripheral wall;

and the lower valve body (12) is symmetrically provided with two second connecting lugs (6) on the peripheral wall, and the first connecting lugs (5) are connected to the second connecting lugs (6).

3. A high stability butterfly valve according to claim 2, wherein the valve stem assembly (2) comprises:

an upper valve rod (21) rotatably connected to the upper valve body (11);

a lower valve rod (22) which is coaxial with the upper valve rod (21) and is rotatably connected to the lower valve body (12);

wherein, two valve rod mount pads (42) are symmetrically arranged on the valve disc (4), and an upper valve rod (21) and a lower valve rod (22) are respectively inserted in the valve rod mount pads (42).

4. A high stability butterfly valve according to claim 3, wherein the valve body assembly (1) is provided with a first shaft hole (7) for mounting the valve rod assembly (2), the elastic valve seat (3) is provided with a second shaft hole (8) for the valve rod assembly (2) to pass through, the upper valve rod (21) and the lower valve rod (22) are respectively sleeved with a valve seat wear-proof sleeve (9), and the valve seat wear-proof sleeve (9) comprises:

an annular part (91), wherein the outer peripheral wall of the annular part (91) is abutted against the inner peripheral wall of the second shaft hole (8), and an annular gap (10) is formed between the inner peripheral wall of the annular part (91) and the upper valve rod (21) and the lower valve rod (22);

and the flange part (92) is connected to one end of the annular part (91), a limiting ring groove (13) is arranged in the first shaft hole (7), and the flange part (92) is arranged in the limiting ring groove (13).

5. The high-stability butterfly valve according to claim 4, wherein a seal ring (14) is provided in the first shaft hole (7) to abut against the end surface of the flange portion (92) and the outer peripheral wall of the valve stem assembly (2), respectively.

6. The high-stability butterfly valve according to claim 5, wherein an annular cavity (15) is formed between the first shaft hole (7) and the upper valve rod (21), and a sealing shaft sleeve (16), a filler (17), a first spring (18), a sealing bearing (19) and a second spring (20) are sequentially arranged in the annular cavity (15) from top to bottom.

7. A high stability butterfly valve according to claim 6, characterized in that the first spring (18) and the second spring (20) are provided with annular gaskets (23) at both ends.

8. The high-stability butterfly valve according to claim 1, wherein two end surfaces of the valve body assembly (1) are provided with clamping grooves (24), and two ends of the elastic valve seat (3) are symmetrically provided with limiting parts (25) clamped in the clamping grooves (24).

9. A high stability butterfly valve according to claim 1, wherein the valve body assembly (1) is provided with a positioning portion (26).