CN217951252U

CN217951252U - Powder butterfly valve

Info

Publication number: CN217951252U
Application number: CN202222257508.2U
Authority: CN
Inventors: 孙志国; 徐艳军; 付海洋
Original assignee: Tianjin Outshine Valve Co ltd
Current assignee: Tianjin Outshine Valve Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-12-02
Anticipated expiration: 2032-08-26

Abstract

The invention provides a powder butterfly valve, which comprises a valve body and a valve seat embedded in the valve body, wherein a rubber layer is coated outside the valve seat; a valve plate is arranged on the inner side of the valve seat, and the upper end of the valve plate is arranged on the valve body through an upper valve shaft and the lower end of the valve plate through a lower valve shaft; the inner wall of the valve body is provided with a convex ring structure, the valve seat is provided with a mounting groove matched with the convex ring structure, a buffer space is reserved between the bottom of the mounting groove of the sealing part of the valve seat and the convex ring structure, and the inner wall of the sealing part of the valve seat is provided with a convex structure protruding towards the center of the valve seat. The rubber layer is coated on the outer side of the valve seat, so that the valve seat and the valve body are prevented from contacting with a medium, the valve body and the valve seat are protected, and the service life is long. The valve plate adopts the eccentric structure design, avoids the stress of the upper valve shaft sealing part and the lower valve shaft sealing part in the closing state of the valve plate, effectively protects the sealing performance between the valve seat and the upper valve shaft and the lower valve shaft, and has more reliable use and longer service life.

Description

Powder butterfly valve

Technical Field

The invention belongs to the technical field of valve design and manufacture, and particularly relates to a powder butterfly valve.

Background

Butterfly valves are mainly used for blocking or regulating flow, and are also widely used in the powder production industry. Generally, the butterfly valve is sealed through valve plate extrusion rubber, and the rubber of traditional butterfly valve all is integrative with valve body or disk seat shell, when the medium is powder or granular material, can be because be mingled with powder or granule medium between valve plate and the rubber, and lead to when the same angle of valve plate closure, extrusion force to the rubber increase, under such a condition, the moment of torsion can increase when the valve plate is opened and close, and rubber wearing and tearing also can accelerate, valve life is shorter, and if reveal in the system operation in-process, then can only stop production and change, cause very big influence to production operation, work efficiency reduces, manufacturing cost increases. Therefore, the conventional butterfly valve needs to be improved to adapt to the working condition environment that the medium is powder or granular substances.

Disclosure of Invention

In view of the above, the present invention provides a powder butterfly valve, which is designed to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a powder butterfly valve comprises a valve body and a valve seat embedded in the valve body, wherein a rubber layer is coated outside the valve seat; a valve plate is arranged on the inner side of the valve seat, and the upper end of the valve plate is arranged on the valve body through an upper valve shaft and the lower end of the valve plate through a lower valve shaft;

the inner wall of the sealing part of the valve seat is provided with a convex structure protruding towards the center of the valve seat;

the lower part of the valve body is provided with a rear plug corresponding to the tail end of the mounting hole of the lower valve shaft; the upper portion of the valve body is provided with a sealing groove corresponding to the upper valve shaft, V-shaped packing is installed in the sealing groove and is compressed by a gland, and meanwhile, an auxiliary sealing assembly is further arranged between the valve seat and the upper valve shaft.

Further, the valve plate includes the valve plate body, has arranged last axle bed portion and lower axle bed portion with one side at the valve plate body.

Furthermore, the upper shaft seat part, the lower shaft seat part and the valve plate body are of an integrally formed structure.

Further, the thickness of the upper shaft seat part and the thickness of the lower shaft seat part are gradually reduced from the outer edge of the valve plate to one side of the center of the valve plate, and the width of the upper shaft seat part and the width of the lower shaft seat part are gradually reduced from the outer edge of the valve plate to one side of the center of the valve plate.

Furthermore, the inner wall of the shaft hole of the valve seat is provided with an auxiliary sealing groove, and the auxiliary sealing assembly comprises an auxiliary sealing piece arranged in the auxiliary sealing groove.

Further, the secondary seal assembly includes a valve shaft seal ring on which the upper valve shaft is mounted in correspondence to the secondary seal.

Further, the secondary seal includes a seal ring.

Furthermore, the outer edge of the convex ring structure is provided with a supporting part which forms a support with the bottom of the mounting groove.

Furthermore, a rear plug sealing ring is arranged between the rear plug and the inner wall of the mounting hole of the lower valve shaft.

Compared with the prior art, the invention has the following advantages:

the butterfly valve provided by the invention is mainly suitable for powder environments such as powder pipelines and storage bins, the rubber layer is coated on the outer side of the valve seat, the contact between the valve seat and a medium is avoided, the valve body and the valve seat are protected, and the service life is long. The valve plate adopts the eccentric structure design, has avoided the valve plate closed state upper and lower valve shaft sealing part atress, and the effectual sealing performance who has protected between disk seat and upper and lower valve shaft uses more reliably, and the life-span is longer.

In the valve plate closing process, the bulge structure is pressed to deform, the buffer space provides a space for the deformation of the valve seat sealing part, a good buffer effect can be achieved, the operation torque is reduced, and the valve opening and closing stability is better. Meanwhile, the inner wall of the sealing part of the valve seat is provided with a convex structure protruding towards the center of the valve seat, so that powder or granular materials can be effectively prevented from being accumulated at a sealing position.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

FIG. 1 is a schematic structural diagram of the front of the present invention;

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of a valve plate in the invention;

FIG. 4 is a schematic structural diagram of the matching part of the valve seat and the upper valve shaft in the invention;

fig. 5 is a schematic diagram of the matching part of the valve body and the valve seat in the invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail below with reference to the drawings and embodiments.

A powder butterfly valve, as shown in fig. 1 to 5, comprises a valve body 1 and a valve seat 2 embedded in the valve body, wherein the inner wall of the valve body is provided with a rubber layer, and the outer surface of the valve seat is integrally coated with the rubber layer; a valve plate 3 is arranged on the inner side of the valve seat, the upper end of the valve plate is arranged on the valve body through an upper valve shaft 4, and the lower end of the valve plate is arranged on the valve body through a lower valve shaft 5; the inner wall of the valve body is provided with a convex ring structure 6, the valve seat is provided with a mounting groove matched with the convex ring structure, a buffer space 8 is reserved between the bottom of the mounting groove of the sealing part of the valve seat and the convex ring structure, the inner wall of the sealing part of the valve seat is provided with a convex structure 9 protruding towards the center of the valve seat, and after the valve is closed, the outer edge of the valve plate is compressed with the convex structure to form sealing. In the valve plate closing process, the bulge structure is pressed to deform, the buffer space provides a space for the deformation of the valve seat sealing part, a good buffer effect can be achieved, the operation torque is reduced, and the valve opening and closing stability is better.

The lower part of the valve body is provided with a rear plug 10 corresponding to the tail end of the mounting hole of the lower valve shaft, a rear plug sealing ring 18 is usually arranged between the rear plug and the inner wall of the mounting hole of the lower valve shaft, so that the sealing performance of the lower valve shaft is ensured, and the sealing performance is easily ensured because the lower valve shaft is positioned in the mounting hole. The upper valve shaft extends out of the valve body, so that a more reliable sealing structure is needed to ensure the sealing performance, specifically, a sealing groove is arranged on the upper portion of the valve body corresponding to the upper valve shaft, a V-shaped packing 11 is installed in the sealing groove and is compressed by a gland 12, and the gland is generally fixed on the valve body by screws. Meanwhile, an auxiliary sealing assembly 7 is arranged between the valve seat and the upper valve shaft. The inner wall of the shaft hole of the valve seat is provided with an auxiliary sealing groove, and the auxiliary sealing assembly comprises an auxiliary sealing piece arranged in the auxiliary sealing groove.

In an alternative embodiment, the secondary seal comprises a seal ring 14, and the secondary seal assembly further comprises a valve shaft seal ring 15 on which the upper valve shaft is mounted in correspondence with the secondary seal. The sealing performance of the valve shaft can be recovered by replacing the sealing ring and/or the sealing ring corresponding to the auxiliary sealing element according to the abrasion condition during maintenance, so that the use cost is low, and the working reliability is high.

The valve plate comprises a valve plate body 18, and an upper shaft seat part 16 and a lower shaft seat part 17 are arranged on the same side of the valve plate body. Generally, the upper shaft seat, the lower shaft seat and the valve plate body are integrally formed. Preferably, the thickness of the upper shaft seat part and the thickness of the lower shaft seat part are gradually reduced from the outer edge of the valve plate to one side of the center of the valve plate, and the width of the upper shaft seat part and the width of the lower shaft seat part are gradually reduced from the outer edge of the valve plate to one side of the center of the valve plate.

In an alternative embodiment, the outer edge of the convex ring structure is provided with a supporting part 13 which forms a support with the bottom of the mounting groove, and the structural design can not only take the buffering characteristic of the buffering space into consideration, but also ensure the stability of the mounting of the valve seat.

The butterfly valve provided by the invention is mainly suitable for powder environments such as powder pipelines and storage bins, the rubber layer is coated on the outer side of the valve seat, the contact between the valve seat and a medium is avoided, the valve body and the valve seat are protected, and the service life is long. The valve plate adopts the eccentric structure design, has avoided the valve plate closed state upper and lower valve shaft sealing part atress, and the effectual sealing performance who has protected between disk seat and upper and lower valve shaft uses more reliably, and the life-span is longer. In the valve plate closing process, the valve plate extrudes the valve seat, and a buffer space is reserved between the bottom of the mounting groove of the valve seat sealing part and the convex ring structure, so that an effective buffer effect can be achieved. Meanwhile, the inner wall of the sealing part of the valve seat is provided with a convex structure protruding towards the center of the valve seat, so that powder or granular materials can be effectively prevented from being accumulated at a sealing position.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A powder butterfly valve which is characterized in that: the valve comprises a valve body and a valve seat embedded in the valve body, wherein a rubber layer is coated outside the valve seat; a valve plate is arranged on the inner side of the valve seat, and the upper end of the valve plate is arranged on the valve body through an upper valve shaft and the lower end of the valve plate through a lower valve shaft;

the inner wall of the valve body is provided with a convex ring structure, the valve seat is provided with a mounting groove matched with the convex ring structure, a buffer space is reserved between the bottom of the mounting groove of the sealing part of the valve seat and the convex ring structure, and the inner wall of the sealing part of the valve seat is provided with a convex structure protruding towards the center of the valve seat;

2. A powder butterfly valve in accordance with claim 1, wherein: the valve plate comprises a valve plate body, and an upper shaft seat part and a lower shaft seat part are arranged on the same side of the valve plate body.

3. A powder butterfly valve in accordance with claim 2, wherein: the upper shaft seat part, the lower shaft seat part and the valve plate body are of an integrally formed structure.

4. A powder butterfly valve in accordance with claim 2, wherein: the thickness of the upper shaft seat part and the thickness of the lower shaft seat part are gradually reduced from the outer edge of the valve plate to one side of the center of the valve plate, and the width of the upper shaft seat part and the width of the lower shaft seat part are gradually reduced from the outer edge of the valve plate to one side of the center of the valve plate.

5. A powder butterfly valve in accordance with claim 1, wherein: the inner wall of the shaft hole of the valve seat is provided with an auxiliary sealing groove, and the auxiliary sealing assembly comprises an auxiliary sealing piece arranged in the auxiliary sealing groove.

6. A powder butterfly valve in accordance with claim 5, wherein: the secondary sealing assembly further comprises a sealing ring, wherein the upper valve shaft is mounted corresponding to the secondary sealing element.

7. A powder butterfly valve according to claim 5 or 6, characterised in that: the secondary seal comprises a seal ring.

8. A powder butterfly valve in accordance with claim 7, wherein: and the outer edge of the convex ring structure is provided with a supporting part which forms a support with the bottom of the mounting groove.

9. A powder butterfly valve in accordance with claim 1, wherein: and a rear plug sealing ring is arranged between the rear plug and the inner wall of the mounting hole of the lower valve shaft.