CN219221310U

CN219221310U - Fluorine lining gate valve

Info

Publication number: CN219221310U
Application number: CN202223147156.1U
Authority: CN
Inventors: 夏小华; 赵建挺; 朱凯伦; 吴通达
Original assignee: Zhejiang Defu Valve Co ltd
Current assignee: Zhejiang Defu Valve Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-06-20
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a fluorine lining gate valve, relates to a fluorine lining valve, and solves the problem that a fluorine lining layer is easy to fall off. The inner wall of the valve body is provided with an inclined boss, the inclined boss protrudes towards the valve rod direction, the inclined boss is arranged between the flow passage and the valve cavity, the inclined boss is provided with an inclined working surface, and the inclined working surface is positioned in the valve cavity and is inclined relative to the axial direction of the valve rod; the flashboard is provided with an upper ring lug which is arranged along the upper semicircular arc of the flashboard, which is close to the valve rod, and the upper ring lug is tightly attached to the inclined working surface along the inclined direction of the inclined working surface to form sealing connection. The inclined working surface is inclined relative to the movement direction of the valve rod, when the annular lugs on the flashboard are clung to the inclined working surface, the annular lugs form a static friction contact mode, the friction mode of the sealing surface is improved, the phenomenon that the fluorine lining layer falls off is effectively reduced, the damage of the sealing surface is reduced, particularly, the position between the flow channel and the valve cavity is avoided, the leakage contact of corrosive media is avoided, and the service life of the valve is prolonged.

Description

Fluorine lining gate valve

Technical Field

The utility model relates to a fluorine lining valve, in particular to a fluorine lining gate valve.

Background

The gate valve is a shutter, the moving direction of the shutter is vertical to the fluid direction, the gate valve can only be fully opened and fully closed, the gate valve can not be regulated and throttled, and the gate valve is sealed by contacting the valve seat and the shutter. In the case of transporting corrosive fluid media, metal gate valves are obviously unusable due to corrosion, and fluorine lined gate valves are often used in such applications where interception is required. The prior Chinese patent publication number: in CN206647551U, a fluorine-lined gate valve is formed by wrapping a fluorine-lined layer made of fluoroplastic, such as an inner wall of a valve body and an outer wall of a gate plate, at a position which may be in contact with a corrosive medium, and in a sealing structure, an original valve seat is replaced by the fluorine-lined layer of the inner wall of the valve body due to the special structure. However, in the frequent opening and closing process of the gate valve, the gate plate rises or falls, and certain sliding friction force is generated by the relative sliding of the fluorine lining layer on the gate plate and the fluorine lining layer on the inner wall of the valve body, so that the fluorine lining layers of the gate plate and the valve body possibly fall off due to friction, particularly, the position between the flow passage and the valve cavity is damaged, the sealing surface is damaged, the sealing performance is reduced, and even the fluorine lining layer is damaged to cause corrosive medium to permeate and corrode the valve body or the gate plate, so that the service life of the valve is shortened.

Disclosure of Invention

The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides a fluorine lining gate valve, which solves the problem that a fluorine lining layer is easy to fall off.

The technical scheme of the utility model is as follows: the valve comprises a flashboard, a valve body and a valve rod, wherein a first fluorine lining layer and a second fluorine lining layer are respectively lined on the outer wall of the flashboard and the inner wall of the valve body, a flow passage and a valve cavity are arranged in the valve body, an inclined boss is arranged on the inner wall of the valve body, protrudes towards the direction of the valve rod and is arranged between the flow passage and the valve cavity, an inclined working surface is arranged on the inclined boss, and is positioned in the valve cavity and is inclined relative to the axial direction of the valve rod; the flashboard is provided with an upper ring lug which is arranged along the upper semicircular arc of the flashboard, which is close to the valve rod, and the upper ring lug is tightly attached to the inclined working surface along the inclined direction of the inclined working surface to form sealing connection.

By adopting the technical scheme, the inclined working surface is inclined relative to the movement direction of the valve rod, when the annular lugs on the flashboard are clung to the inclined working surface, the annular lugs form a static friction contact mode, the friction mode of the sealing surface is improved, the phenomenon that the fluorine lining layer falls off is effectively reduced, the damage of the sealing surface is reduced, particularly, the position between the flow passage and the valve cavity is avoided, the leakage contact of corrosive media is avoided, and the service life of the valve is prolonged.

The utility model is further provided with: the first fluorine lining layer covers the outer surface of the upper ring lug, a through hole penetrating through the upper ring lug is formed in the upper ring lug, a fluorine lining column is arranged in the through hole, and two ends of the fluorine lining column and the first fluorine lining layer are integrally formed.

By adopting the further arrangement, the fluorine lining column is adhered to the two side surfaces of the upper ring lug, the adhesive force of the first fluorine lining layer at the upper ring lug is enhanced, and the first fluorine lining layer at the upper ring lug is further prevented from falling off.

Still further, the present utility model provides: the two outer side surfaces of the flashboard form a concave cavity facing the center direction, the bottom of the concave cavity is provided with a jacking plane, and an included angle of 91-95 degrees is formed between the jacking plane and the central axis of the runner.

By adopting the further arrangement, the impact force of the medium impact jacking plane can be decomposed to form the acting force for the falling of the flashboard, the sealing performance of the flashboard is compensated by utilizing the medium pressure, the tightness of the annular lug and the inclined working surface is improved, and the sealing performance of the flashboard is improved.

Still further, the present utility model is provided with: the inclined working surface forms an included angle of 30-60 degrees with the axial direction of the valve rod.

By adopting the further arrangement, the contact mode of the sealing surface is changed, and the included angle is reasonable in design.

Still further, the present utility model is provided with: the flashboard is also provided with a lower ring sealing surface which is arranged along the lower semicircular arc of the flashboard.

With the above still further arrangement, the lower ring seal surface is adapted to contact the valve body seal surface in contact with other than the upper ring ledge to form a seal.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of the utility model at A in FIG. 1;

FIG. 3 is a schematic view of the structure of the shutter plate of the present utility model;

wherein, 1, flashboard; 2. a valve body; 3. a valve stem; 4. a first fluorine-lined layer; 5. a second fluorine-lined layer; 21. a flow passage; 22. a valve cavity; 23. an inclined boss; 231. tilting the working surface; 11. an upper ring lug; 41. lining fluorine column; 12. a cavity; 121. pressing a plane; 13. and a lower ring sealing surface.

Detailed Description

The fluorine lining gate valve as shown in fig. 1-3 comprises a gate plate 1, a valve body 2 and a valve rod 3, wherein a first fluorine lining layer 4 and a second fluorine lining layer 5 are respectively lined on the outer wall of the gate plate 1 and the inner wall of the valve body 2, a flow passage 21 and a valve cavity 22 are arranged in the valve body 2, the valve cavity 22 is positioned above the flow passage 21, and the valve rod 3 drives the gate plate 1 to move between the flow passage 21 and the valve cavity 22. The inner wall of the valve body 2 is provided with an inclined boss 23, the inclined boss 23 protrudes towards the valve rod 3, the inclined boss 23 is arranged between the flow passage 21 and the valve cavity 22, the inclined boss 23 is provided with an inclined working surface 231 facing the valve cavity 22, and the inclined working surface 231 is positioned in the valve cavity 22 and is inclined relative to the axial direction of the valve rod 3; the flashboard 1 is provided with an upper ring lug 11, the upper ring lug 11 is arranged along the upper semicircular arc of the flashboard 1, which is close to the valve rod 3, the upper ring lug 11 is in a circular arc ring shape of half of the flashboard 1, the upper ring lug 11 and the inclined working surface 231 are clung to form sealing connection along the inclined direction of the inclined working surface 231, and the sealing surface formed by the upper ring lug 11 and the inclined working surface 231 is also in an inclined shape. When the shutter 1 descends to close the valve, the upper ring lugs 11 descend close to and contact the inclined working faces 231, and the upper ring lugs 11 correspond to cladding on the outer sides of the inclined working faces 231, thereby closing the shutter 1 and forming a seal. During the movement of the shutter plate 1, friction of relative sliding is not generated between the annular lugs and the inclined working surface 231, and the phenomenon that the fluorine lining layer falls off is remarkably reduced.

The first fluorine lining layer 4 covers the outer surface of the upper ring lug 11, the second fluorine lining layer 5 covers the surface of the inclined boss 23, and when the sealing is carried out, the first fluorine lining layer 4 and the second fluorine lining layer 5 at opposite positions are contacted and clung. The upper ring lug 11 is provided with a through hole penetrating the upper ring lug 11, a fluorine lining column 41 is arranged in the through hole, and two ends of the fluorine lining column 41 are integrally connected with the first fluorine lining layer 4, so that in the processing process of the first fluorine lining layer 4, fluoroplastic can be welded in the through hole to form the fluorine lining column 41, and the first fluorine lining layer 4 on the upper ring lug 11 is adhered.

The two outer side surfaces of the flashboard 1 form a concave cavity 12 facing the center direction, the bottom of the concave cavity 12 is provided with a top flattening surface 121, the top flattening surface 121 and the central axis of the runner 21 form an included angle alpha of 91-95 degrees, then the medium impact force in the runner 21 also forms an included angle alpha with the top flattening surface 121, the top flattening surface 121 is stressed and decomposed to form the descending acting force of the flashboard 1, so that when the medium pressure is increased, the flashboard 1 is more closely attached to a sealing surface, and the sealing degree is higher.

The inclined working surface 231 forms an included angle beta of 30-60 degrees with the axial direction of the valve rod 3, so that the contact mode of the sealing surface can be basically changed, and relative sliding friction is not generated when the inclined working surface 231 contacts with the upper ring lug 11.

The flashboard 1 is also provided with a lower ring sealing surface 13, the lower ring sealing surface 13 is arranged along the lower semicircular arc of the flashboard 1, the lower ring sealing surface 13 and the upper ring lug 11 can form an entire outer circle of the flashboard 1, and the tightness of valve closing is ensured.

Claims

1. The utility model provides a lining fluorine gate valve, is including flashboard, valve body and valve rod, lining has first lining fluorine layer, second lining fluorine layer on the outer wall of flashboard, the inner wall of valve body respectively, have runner and valve pocket in the valve body, its characterized in that: an inclined boss is arranged on the inner wall of the valve body, protrudes towards the valve rod direction, is arranged between the flow passage and the valve cavity, and is provided with an inclined working surface which is positioned in the valve cavity and is inclined relative to the axial direction of the valve rod; the flashboard is provided with an upper ring lug, the upper ring lug is arranged along an upper semicircular arc of the flashboard, which is close to the valve rod, and the upper ring lug is tightly attached to the inclined working surface along the inclined direction of the inclined working surface to form sealing connection.

2. The fluorine lined gate valve of claim 1, wherein: the first fluorine lining layer covers the outer surface of the upper ring lug, a through hole penetrating through the upper ring lug is formed in the upper ring lug, a fluorine lining column is arranged in the through hole, and two ends of the fluorine lining column and the first fluorine lining layer are integrally formed.

3. The fluorine lined gate valve of claim 1 or 2, wherein: the two outer side surfaces of the flashboard form a concave cavity facing the center direction, the bottom of the concave cavity is provided with a jacking plane, and the jacking plane and the central axis of the runner form an included angle of 91-95 degrees.

4. The fluorine lined gate valve of claim 1 or 2, wherein: the inclined working surface forms an included angle of 30-60 degrees with the axis direction of the valve rod.

5. The fluorine lined gate valve of claim 1 or 2, wherein: the flashboard is also provided with a lower ring sealing surface, and the lower ring sealing surface is arranged along the lower semicircular arc of the flashboard.