CN221857565U - A double eccentric sealing butterfly valve - Google Patents

Abstract

The utility model relates to the technical field of butterfly valves, and specifically discloses a double eccentric sealing butterfly valve, including a valve body and a valve stem, a valve seat is installed on one side of the valve body, and a valve plate assembly is arranged at the valve seat; the valve plate assembly includes a plugging plate and an annular plate, a sealing groove is formed between the plugging plate and the annular plate, and a sealing ring for sealing the connection between the valve plate assembly and the valve seat is installed in the sealing groove; the two end faces of the sealing ring are respectively provided with a right protrusion and a left protrusion. In the utility model, the sealing ring is installed between the plugging plate and the annular plate, and the area clamped and fixed between the two and the sealing ring is a whole annular area, and the inner ring of the sealing ring is provided with a right protrusion and a left protrusion, and the sealing ring and the plugging plate and the annular plate are arranged in a clamping manner on the basis of transverse clamping, so as to deepen the stability of the connection between the sealing ring and the plugging plate and the annular plate, and can greatly reduce the torsion amplitude of the sealing ring when subjected to friction, and achieve a better sealing effect.

Description

A double eccentric sealing butterfly valve

Technical Field

The utility model belongs to the technical field of butterfly valves, and in particular relates to a double eccentric sealing butterfly valve.

Background Art

Double eccentric butterfly valve is also called high-performance butterfly valve. It is mainly used for drainage in water plants, power plants, steel mills, chemical industry, water source projects, environmental facilities construction and other systems. It is especially suitable for use as a regulating and intercepting device on waterway pipelines. Compared with the centerline butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, has a longer life and good stability.

In the Chinese patent with publication number CN 219045578 U, a sealing gasket is arranged on the outer ring surface of the butterfly plate, so that when the butterfly plate is closed, it can be pressed against the inner ring of the valve body, thereby improving the overall sealing performance. In addition, rounded corners are arranged on the edges of the left and right surfaces of the butterfly plate. When the butterfly plate rotates, its left and right sides will not contact the inner ring of the valve body, thus avoiding scratches, thereby further improving the sealing performance of the sealing gasket and the inner ring of the valve body.

However, the above device has the following problems during use: the sealing ring is connected to the valve body through a connecting hole, and the sealing ring is fixed at multiple points. The fixing effect provided by the above method is limited, and the sealing ring will be subjected to a twisting force due to friction during the rotation of the valve plate. The sealing ring fixed by the above method is prone to large-scale twisting, and the twisted sealing ring is prone to leakage.

Utility Model Content

The purpose of the utility model is to provide a double eccentric sealing butterfly valve to solve the problems raised by the above background technology.

To achieve the above purpose, the utility model provides the following technical solution, including a valve body and a valve stem, a valve seat is installed on one side of the valve body, a valve plate assembly is arranged at the valve seat, and the valve plate assembly is installed on the side of the valve stem close to the valve seat;

The valve plate assembly comprises a sealing plate and an annular plate, a sealing groove is formed between the sealing plate and the annular plate, and a sealing ring is installed in the sealing groove for sealing the connection between the valve plate assembly and the valve seat;

A right convex portion and a left convex portion are respectively arranged at two end surfaces of the sealing ring.

Preferably, the valve stem is installed at a middle position of the valve body, and the valve seat is detachably fixedly connected to the valve body via a first bolt.

Preferably, the blocking plate and the annular plate are detachably fixedly connected by a second bolt, a circular groove is provided in the blocking plate, and the annular plate is clamped in the circular groove.

Preferably, the right protrusion is plugged into the first slot in the sealing plate, the left protrusion is plugged into the second slot in the annular plate, and the right protrusion and the left protrusion are installed on the side of the sealing ring away from the inner wall of the valve seat.

Preferably, of the two corners on one side of the inner wall of the valve seat where the sealing ring is attached, an arc-shaped portion is provided at a corner away from the valve stem, and the arc-shaped portion protrudes toward the side away from the valve stem.

Preferably, a mounting seat is detachably fixedly mounted on the valve stem, and the valve plate assembly is fixedly mounted on the mounting seat.

Preferably, the bottom of the valve stem is inserted into the lower center seat in the valve body, the top of the valve stem is rotatably connected to the upper center seat, the upper center seat is fixedly installed on the top of the valve body, and sealing gaskets are installed at the positions where the lower center seat, the upper center seat and the valve stem are connected. The top of the valve stem is inserted into the middle position of the ear plate, and the ear plate is fixedly installed on the top of the valve body by a third bolt. The top of the valve stem is set to a rectangular shape.

Compared with the prior art, the beneficial effects of the utility model are:

In the utility model, the sealing ring is installed between the sealing plate and the annular plate, the area where the two are clamped and fixed with the sealing ring is a whole annular area, and a right protrusion and a left protrusion are arranged at the inner circle of the sealing ring. The sealing ring and the sealing plate and the annular plate are arranged in a card connection mode on the basis of transverse clamping, thereby deepening the stability of the connection between the sealing ring and the sealing plate and the annular plate, and can greatly reduce the torsion amplitude of the sealing ring when subjected to friction, thereby achieving a better sealing effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of the utility model.

FIG. 2 is a side view of the utility model.

FIG3 is a schematic diagram of the internal structure of the utility model.

FIG. 4 is a schematic diagram of the structure of point A in FIG. 3 of the present invention.

In the figure: 1. valve body; 2. valve stem; 3. valve seat; 4. valve plate assembly; 401. sealing plate; 402. annular plate; 403. sealing ring; 4031. right raised portion; 4032. left raised portion; 4033. arc-shaped portion; 5. mounting seat; 6. lower center seat; 7. upper center seat; 8. ear plate.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Referring to Figures 1 to 4, a double eccentric sealing butterfly valve includes a valve body 1 and a valve stem 2. The valve stem 2 is installed at the middle position of the valve body 1. A valve seat 3 is installed on one side of the valve body 1. As shown in Figure 1, the valve seat 3 is detachably fixedly connected to the valve body 1 by a first bolt. A valve plate assembly 4 is provided at the valve seat 3. The valve plate assembly 4 is installed on the side of the valve stem 2 close to the valve seat 3. The valve plate assembly 4 is installed on one side of the valve stem 2 and does not coincide with the center of the valve stem 2. The valve plate assembly 4 rotates under the drive of the valve stem 2. The valve plate assembly 4 cooperates with the valve seat 3. During the rotation process, the hole in the middle of the valve seat 3 is opened and closed, thereby achieving the effect of controlling the flow of the fluid and stopping the flow.

As shown in FIGS. 3 and 4 , the valve plate assembly 4 includes a blocking plate 401 and an annular plate 402. The blocking plate 401 and the annular plate 402 are detachably fixedly connected by a second bolt. Specifically, a circular groove is provided in the blocking plate 401, and the annular plate 402 is clamped with the circular groove. A sealing groove is formed between the blocking plate 401 and the annular plate 402, and a sealing ring 403 for sealing the connection between the valve plate assembly 4 and the valve seat 3 is installed in the sealing groove;

The outer surface of the conventional sealing ring is smooth. When rubbing against the inner wall of the valve seat 3, the forces received at different places are different, and twisting is easy to occur. In order to prevent the sealing ring 403 from twisting, a right protrusion 4031 and a left protrusion 4032 are respectively provided at the two end faces of the sealing ring 403. The right protrusion 4031 is plugged into the first slot in the blocking plate 401, and the left protrusion 4032 is plugged into the second slot in the annular plate 402. The right protrusion 4031 and the left protrusion 4032 are installed in the sealing ring 403 away from the valve seat 3. On one side of the wall, two protrusions are installed on the side away from the valve seat 3. The sealing ring 403 close to the inner wall of the valve seat 3 has good ductility and can fit the inner wall of the valve seat 3 well. Among the two corners on the side where the sealing ring 403 fits the inner wall of the valve seat 3, an arc portion 4033 is provided at a corner away from the valve stem 2. The arc portion 4033 protrudes toward the side away from the valve stem 2. The setting of the arc portion 4033 can make the sealing ring 403 fit the inner wall of the valve seat 3 more smoothly during the rotation of the valve plate sealing plate 401;

Specifically, the sealing ring 403 seals the connection between the valve plate assembly 4 and the valve seat 3 to prevent fluid leakage. At the same time, a right protrusion 4031 and a left protrusion 4032 are provided on the sealing ring 403 to clamp and locate the position of the sealing ring 403, so as to prevent the sealing ring 403 from twisting significantly and quickly recover after twisting. At the same time, the setting of the arc portion 4033 makes the valve seat 3 and the valve plate assembly 4 smoother during rotation.

As shown in FIG. 2 , a mounting seat 5 is detachably fixedly mounted on the valve stem 2 , and the valve plate assembly 4 is fixedly mounted on the mounting seat 5 ;

In a further embodiment, the bottom of the valve stem 2 is inserted into the lower center seat 6 in the valve body 1, the top of the valve stem 2 is rotatably connected to the upper center seat 7, and the upper center seat 7 is fixedly installed on the top of the valve body 1. Sealing gaskets are installed at the positions where the lower center seat 6, the upper center seat 7 and the valve stem 2 are connected. The sealing gaskets have a sealing effect to avoid leakage. The top of the valve stem 2 is inserted into the middle position of the ear plate 8, and the ear plate 8 is fixedly installed on the top of the valve body 1 by a third bolt. The top of the valve stem 2 is set to a rectangular shape, and the rectangular shape is more convenient for leveraging when twisting.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A double eccentric sealing butterfly valve, comprising a valve body (1) and a valve stem (2), characterized in that a valve seat (3) is installed on one side of the valve body (1), a valve plate assembly (4) is arranged at the valve seat (3), and the valve plate assembly (4) is installed on a side of the valve stem (2) close to the valve seat (3); The valve plate assembly (4) comprises a sealing plate (401) and an annular plate (402); a sealing groove is formed between the sealing plate (401) and the annular plate (402); a sealing ring (403) is installed in the sealing groove for sealing the connection between the valve plate assembly (4) and the valve seat (3); The two end surfaces of the sealing ring (403) are respectively provided with a right convex portion (4031) and a left convex portion (4032). 2. A double eccentric sealing butterfly valve according to claim 1, characterized in that the valve stem (2) is installed at the middle position of the valve body (1), and the valve seat (3) is detachably fixedly connected to the valve body (1) by a first bolt. 3. A double eccentric sealing butterfly valve according to claim 1, characterized in that the sealing plate (401) and the annular plate (402) are detachably fixedly connected by a second bolt, and a circular groove is provided in the sealing plate (401), and the annular plate (402) is clamped in the circular groove. 4. A double eccentric sealing butterfly valve according to claim 1, characterized in that the right protrusion (4031) is plugged into the first groove in the sealing plate (401), and the left protrusion (4032) is plugged into the second groove in the annular plate (402), and the right protrusion (4031) and the left protrusion (4032) are installed on the side of the sealing ring (403) away from the inner wall of the valve seat (3). 5. A double eccentric sealing butterfly valve according to claim 1, characterized in that, of the two corners on one side of the inner wall of the valve seat (3) where the sealing ring (403) fits, an arc-shaped portion (4033) is provided at a corner away from the valve stem (2), and the arc-shaped portion (4033) protrudes toward the side away from the valve stem (2). 6. A double eccentric sealing butterfly valve according to claim 1, characterized in that a mounting seat (5) is detachably fixedly mounted on the valve stem (2), and the valve plate assembly (4) is fixedly mounted on the mounting seat (5). 7. A double eccentric sealing butterfly valve according to claim 1, characterized in that the bottom of the valve stem (2) is inserted into the lower center seat (6) in the valve body (1), the top of the valve stem (2) is rotatably connected to the upper center seat (7), the upper center seat (7) is fixedly installed on the top of the valve body (1), and sealing gaskets are installed at the positions where the lower center seat (6), the upper center seat (7) and the valve stem (2) are connected, the top of the valve stem (2) is inserted into the middle position of the ear plate (8), the ear plate (8) is fixedly installed on the top of the valve body (1) by a third bolt, and the top of the valve stem (2) is set to a rectangular shape.