CN221683633U - A highly sealed butterfly valve - Google Patents

Abstract

The utility model discloses a highly sealed butterfly valve, comprising a valve body, a valve plate and a valve seat. The valve seat is vertically welded at the middle position of the top of the valve body. The valve plate is embedded in the middle position of the interior of the valve body. A vertically arranged valve stem is penetrated through the middle position of the valve plate. An interference fit is achieved between the valve stem and the valve plate. The valve plate and the valve body are rotatably connected through the valve stem. A sealing liner A and a sealing liner B are embedded in the interior of the valve body. The valve body and the valve plate of this highly sealed butterfly valve are locked by a locking member and a locking groove that cooperate with each other, which can avoid the displacement of the valve plate due to the high pressure in the pipeline, fully guarantee the stability and sealing of the valve plate after closing, and also can avoid the valve plate from not closing in place and affecting the sealing effect. Two sets of sealing liners installed on the inner wall of the valve body are respectively located on both sides of the valve plate, and cooperate with the sealing strips on the inner side thereof to further improve the sealing performance of the edge position of the valve plate.

Description

A highly sealed butterfly valve

Technical Field

The utility model relates to the field of butterfly valves, in particular to a highly sealed butterfly valve.

Background Art

A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc, which rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a cutting and throttling role in the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation.

Butterfly valves are widely used, but they still have some problems: 1) Butterfly valves rely on locking the valve stem to lock the valve plate. When the pressure in the pipeline is high, the valve plate is prone to slight deviation, and the closed position gap between the valve plate and the valve body is prone to expand, resulting in leakage. It is not suitable for use scenarios with high sealing requirements; 2) Butterfly valves rely on the rubber ring on the edge for edge sealing. When high-temperature or low-temperature fluids are transported in the pipeline, it is easy to affect the sealing rubber ring, thereby affecting its sealing effect; Therefore, in view of the above situation, there is an urgent need to develop a highly sealed butterfly valve to overcome the shortcomings in current practical applications and meet current needs.

Utility Model Content

The purpose of the utility model is to provide a highly sealed butterfly valve to solve the problems raised in the above background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A highly sealed butterfly valve comprises a valve body, a valve plate and a valve seat, wherein the valve seat is vertically welded to the middle position of the top of the valve body, the valve plate is embedded in the middle position of the inner part of the valve body, a vertically arranged valve stem is penetrated through the middle position of the valve plate, an interference fit is achieved between the valve stem and the valve plate, and the valve plate and the valve body are rotatably connected through the valve stem;

The valve body is embedded with a sealing liner A and a sealing liner B, which are vertically embedded in the inner wall of the valve body. The inner wall of the valve body is provided with a circular inner groove, and the inner wall of the valve body is provided with a horizontally arranged installation groove.

The valve plate also includes a sealing rubber ring, a locking groove and a locking piece. An annular groove is opened on the edge of the valve plate, and the sealing rubber ring is nested in the annular groove. The locking groove is horizontally welded at the edge of the side wall of the valve plate, and the locking piece is embedded in the inside of the installation groove.

As a further solution of the utility model: a valve stem operator is installed on the top of the valve seat, and a hand wheel is installed on one side of the valve stem operator. The hand wheel cooperates with the valve stem operator to drive the valve stem to rotate, thereby controlling the opening and closing of the valve plate.

As a further solution of the utility model: a sealing strip A is embedded and installed on the inner side of the sealing liner A, and a sealing strip B is embedded and installed on the inner side of the sealing liner B. The sealing liner A is located on one side of the valve plate, and the sealing liner B is located on the other side of the valve plate. The sealing liner A and the sealing liner B are relatively distributed on both sides of the valve plate, and the sealing effect of the edge position is enhanced by the sealing strips A and the sealing strips B on the inner walls of the two respectively, so as to achieve a high degree of sealing.

As a further solution of the utility model: the locking piece includes a locking block, a screw and a hexagonal nut. One end of the screw passes through the valve body and extends to the interior of the mounting groove. The locking block is embedded in the interior of the mounting groove and is slidably connected to the mounting groove. One end of the screw located in the mounting groove is rotatably connected to the locking block. The hexagonal nut is vertically welded to the other end of the screw. The locking piece is horizontally aligned with the locking groove. By controlling the end of the locking piece to be inserted into the locking groove, the valve plate and the valve body are locked to prevent the valve plate from being subjected to fluid pressure and causing the sealing of the joint to be reduced.

As a further solution of the utility model: the sealing rubber ring of the valve plate matches the inner groove of the valve body, and the sealing of the edge gap can be achieved by the provided sealing rubber ring.

Beneficial effect: The valve body and valve plate of this highly sealed butterfly valve are locked by the cooperation of locking parts and locking grooves, which can avoid the displacement of the valve plate due to the high pressure in the pipeline, fully guarantee the stability and sealing of the valve plate after closing, and also avoid the valve plate not closing in place and affecting the sealing effect. The two sets of sealing liners installed on the inner wall of the valve body are respectively located on both sides of the valve plate, and cooperate with the sealing strips on the inside to further improve the sealing performance of the edge of the valve plate. Compared with the traditional butterfly valve which only relies on the edge sealing rubber ring to achieve sealing, its sealing performance is stronger.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a front structural schematic diagram of the present utility model.

FIG. 2 is a schematic diagram of the back structure of the utility model.

FIG. 3 is a schematic structural diagram of a sealing liner A of the present invention.

FIG. 4 is a schematic structural diagram of a sealing liner B of the present invention.

FIG5 is a schematic diagram of the valve plate structure of the present invention.

FIG. 6 is a schematic diagram of the locking structure of the utility model.

In the figure: 1. valve body; 11. sealing liner A; 111. sealing strip A; 12. inner groove; 13. sealing liner B; 131. sealing strip B; 14. mounting groove; 2. valve plate; 21. valve stem; 22. sealing rubber ring; 23. locking groove; 24. locking piece; 241. locking block; 242. screw; 243. hexagonal nut; 3. valve seat; 4. valve stem operator; 5. handwheel.

DETAILED DESCRIPTION

Example

Please refer to Figures 1 to 6. In the embodiment of the utility model, a highly sealed butterfly valve includes a valve body 1, a valve plate 2 and a valve seat 3. The valve seat 3 is vertically welded to the middle position of the top of the valve body 1. The valve plate 2 is embedded in the middle position of the valve body 1. A vertically arranged valve stem 21 is penetrated through the middle position of the valve plate 2. An interference fit is achieved between the valve stem 21 and the valve plate 2. The valve plate 2 is rotatably connected to the valve body 1 through the valve stem 21.

The valve body 1 is embedded with a sealing liner A11 and a sealing liner B13, which are vertically embedded in the inner wall of the valve body 1. The inner wall of the valve body 1 is provided with a circular inner groove 12, and the inner wall of the valve body 1 is provided with a horizontally arranged installation groove 14.

The valve plate 2 also includes a sealing rubber ring 22, a locking groove 23 and a locking piece 24. An annular groove is opened on the edge of the valve plate 2, and the sealing rubber ring 22 is nested and installed in the annular groove. The locking groove 23 is horizontally welded at the edge of the side wall of the valve plate 2, and the locking piece 24 is embedded and installed inside the installation groove 14.

As a further solution of the utility model: a valve stem operator 4 is installed on the top of the valve seat 3, and a hand wheel 5 is installed on one side of the valve stem operator 4. The hand wheel 5 cooperates with the valve stem operator 4 to drive the valve stem 21 to rotate, thereby controlling the opening and closing of the valve plate 2.

As a further solution of the utility model: a sealing strip A111 is embedded and installed on the inner side of the sealing liner A11, and a sealing strip B131 is embedded and installed on the inner side of the sealing liner B13. The sealing liner A11 is located on one side of the valve plate 2, and the sealing liner B13 is located on the other side of the valve plate 2. The sealing liner A11 and the sealing liner B13 are relatively distributed on both sides of the valve plate 2, and the sealing effect of the edge position is enhanced by the sealing strips A111 and B131 on the inner walls of the two respectively, so as to achieve high sealing.

As a further solution of the utility model: the locking piece 24 includes a locking block 241, a screw 242 and a hexagonal nut 243. One end of the screw 242 passes through the valve body 1 and extends to the inside of the mounting groove 14. The locking block 241 is embedded in the mounting groove 14 and is slidably connected to the mounting groove 14. One end of the screw 242 located in the mounting groove 14 is rotatably connected to the locking block 241. The hexagonal nut 243 is vertically welded to the other end of the screw 242. The locking piece 24 is horizontally aligned with the locking groove 23. By controlling the end of the locking piece 24 to be inserted into the locking groove 23, the valve plate 2 and the valve body 1 are locked to prevent the valve plate 2 from being subjected to fluid pressure and causing the sealing of the joint to be reduced.

As a further solution of the utility model: the sealing rubber ring 22 of the valve plate 2 matches the inner groove 12 of the valve body 1, and the sealing of the edge gap can be achieved by the provided sealing rubber ring 22.

The working principle of the utility model is: when the highly sealed butterfly valve is in use, the valve body 1 is connected to the pipeline, and the hand wheel 5 is turned when opening and closing, and the valve stem operator 4 is cooperated to drive the valve stem 21 to rotate, thereby driving the valve plate 2 to rotate, and realizing the opening and closing of the butterfly valve. When the valve plate 2 is closed, the screw rod 242 is driven to rotate through the hexagonal nut 243, and the locking block 241 is driven to enter the locking groove 23 to lock the valve plate 2. At this time, the outer side of the sealing rubber ring 22 on the edge of the valve plate 2 is located in the inner groove 12 of the valve body 1, so as to achieve sealing between the valve plate 2 and the edge of the valve body 1, and at the same time, the sealing strips A111 and B131 on the inner side of the sealing liner A11 and the sealing liner B13 are close to the outer wall of the valve plate 2, and the sealing performance of the edge position is further enhanced.

Although the 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 (5)

1. A highly sealed butterfly valve, characterized by: the valve comprises a valve body (1), a valve plate (2) and a valve seat (3), wherein the valve seat (3) is vertically welded at the middle position of the top of the valve body (1), the valve plate (2) is embedded in the middle position of the inside of the valve body (1), a valve rod (21) which is vertically arranged is arranged in the middle position of the valve plate (2) in a penetrating manner, interference fit is realized between the valve rod (21) and the valve plate (2), and the valve plate (2) is rotationally connected with the valve body (1) through the valve rod (21);

The inner part of the valve body (1) is embedded with a sealing liner A (11) and a sealing liner B (13), the sealing liner A (11) and the sealing liner B (13) are vertically embedded and installed on the inner wall of the valve body (1), a circular inner groove (12) is formed in the inner wall of the valve body (1), and a horizontally arranged mounting groove (14) is formed in the inner wall of the valve body (1);

The valve plate (2) further comprises a sealing rubber ring (22), a locking groove (23) and a locking piece (24), wherein an annular groove is formed in the edge of the valve plate (2), the sealing rubber ring (22) is installed in the annular groove in a nested mode, the locking groove (23) is welded at the edge position of the side wall of the valve plate (2) in a horizontal mode, and the locking piece (24) is installed in the installation groove (14) in an embedded mode.

2. The highly sealed butterfly valve of claim 1, wherein: the top of the valve seat (3) is provided with a valve rod operator (4), and one side of the valve rod operator (4) is provided with a hand wheel (5).

3. The highly sealed butterfly valve of claim 1, wherein: the inner side embedding of seal inside lining A (11) is installed joint strip A (111), joint strip B (131) are installed to the inboard embedding of seal inside lining B (13), seal inside lining A (11) are located one side of valve plate (2), seal inside lining B (13) are located the opposite side of valve plate (2).

4. The highly sealed butterfly valve of claim 1, wherein: the locking piece (24) comprises a locking block (241), a screw rod (242) and a hexagonal nut (243), one end of the screw rod (242) penetrates through the valve body (1) and extends to the inside of the mounting groove (14), the locking block (241) is embedded in the mounting groove (14) and is slidably connected with the mounting groove (14), one end of the screw rod (242) located in the mounting groove (14) is rotatably connected with the locking block (241), the hexagonal nut (243) is vertically welded to the other end of the screw rod (242), and the locking piece (24) is horizontally aligned with the locking groove (23).

5. The highly sealed butterfly valve of claim 1, wherein: the sealing rubber ring (22) of the valve plate (2) is matched with the inner groove (12) of the valve body (1).