CN218598853U

CN218598853U - Plug valve

Info

Publication number: CN218598853U
Application number: CN202222339074.0U
Authority: CN
Inventors: 邵建腾; 林忠孩; 杨洪沣
Original assignee: Zhejiang Doxi Valve Co ltd
Current assignee: Zhejiang Doxi Valve Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-03-10
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a plug valve relates to the valve field, including valve body, valve gap and cock, the cock rotates to be installed in the valve body, be equipped with the gasket between valve gap and cock and the valve body, be equipped with the pressure assembly who pushes down the gasket between valve gap circumference inner wall and the cock outer wall and with the global sealed complex seal assembly of cock, pressure assembly and the coaxial setting of seal assembly. The utility model has the advantages of simple structure and good working stability.

Description

Plug valve

Technical Field

The utility model relates to a valve field, concretely relates to plug valve.

Background

The existing plug valve is generally characterized in that a sealing mechanism is arranged between a valve cover and a plug, acting force is applied through a screw, the sealing mechanism can apply downward pressure to the plug after being stressed, if the pressure is too large, the situation that the plug rotates due to too large resistance and clamping stagnation occurs can be caused, and if the pressure is too small, the situation that sealing action fails and leakage occurs can be caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the background art, the utility model provides a plug valve with simple structure and good working stability.

The utility model discloses the technical scheme who adopts: the plug valve comprises a valve body, a valve cover and a plug, wherein the plug is rotatably installed in the valve body, a gasket is arranged between the valve cover and the plug and between the valve body and the plug, a pressure assembly for pressing the gasket and a sealing assembly in sealing fit with the peripheral surface of the plug are arranged between the circumferential inner wall of the valve cover and the outer wall of the plug, and the pressure assembly and the sealing assembly are coaxially arranged.

The pressure assembly comprises a screw arranged on the valve cover, a base plate positioned below the screw and a pressing plate positioned below the base plate, wherein a first disc spring abutting against the pressing plate and the base plate is arranged between the pressing plate and the base plate.

The sealing assembly comprises a first gasket, a second disc spring, a conical seat and a conical ring which are sequentially arranged from top to bottom, a first inclined plane facing the conical ring is arranged at the lower end of the conical seat, a second inclined plane in contact fit with the first inclined plane is arranged at the upper end of the conical ring, and a sealing ring is arranged between the inner wall of the conical ring and the cock.

And a locking nut in threaded fit is arranged on the cock, is positioned above the first washer, and is provided with a plane bearing and a second washer between the first washer and the second washer.

The inner wall of the valve body and the outer surface of the cock are respectively coated with a lining.

The utility model has the advantages that: this technical scheme sets up pressure components and seal assembly between valve gap and cock and valve body, and the coaxial setting of the two plays the effect of adjusting the cock elasticity and guaranteeing sealing performance respectively, has simple structure, advantage that job stabilization nature is good.

Drawings

Fig. 1 is a schematic structural view of a plug valve according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of a point a in fig. 1.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in the figures, the plug valve comprises a valve body 1, a valve cover 2 and a plug 3, wherein the plug 3 is rotatably installed in the valve body 1, a gasket 4 is arranged between the valve cover 2 and the plug 3 and between the valve body 1 and the plug 3, a pressure assembly for pressing the gasket 4 and a sealing assembly in sealing fit with the peripheral surface of the plug 3 are arranged between the circumferential inner wall of the valve cover 2 and the outer wall of the plug 3, and the pressure assembly and the sealing assembly are coaxially arranged; this technical scheme sets up pressure components and seal assembly between valve gap and cock and valve body, and the coaxial setting of the two plays the effect of adjusting the cock elasticity and guaranteeing sealing performance respectively, has simple structure, advantage that job stabilization nature is good.

Pressure assembly is including installing screw 5 on the valve gap 2, the backing plate 6 that is located screw 5 below and the clamp plate 7 that is located backing plate 6 below, be equipped with the first dish spring 8 of contradicting the two between clamp plate 7 and the backing plate 6, through adjusting screw's installation depth to adjusting plate is to the pressure size of gasket, provide the elasticity pretightning force after the first dish spring pressurized, prevent that pressure from leading to the cock to rotate the circumstances that the card hinders too greatly.

The seal assembly comprises a first gasket 9, a second disc spring 10, a conical seat 11 and a conical ring 12 which are sequentially arranged from top to bottom, wherein the lower end of the conical seat 11 is provided with a first inclined surface 13 facing the conical ring 12, the upper end of the conical ring 12 is provided with a second inclined surface 14 in contact fit with the first inclined surface 13, a seal ring 15 is arranged between the inner wall of the conical ring 12 and the cock 3, the first gasket can receive pressure applied from the top and is changed into elastic pretightening force to be transmitted to the conical seat below through the acting force of the second disc spring piece, and the vertical acting force of an inclined surface fitting piece between the conical seat and the conical ring is changed into transverse acting force, so that the seal ring compresses the outer circumferential surface of the cock, and the sealing performance is ensured.

The cock 3 is provided with a locking nut 16 in threaded fit, the locking nut 16 is positioned above the first washer 9, a plane bearing 17 and a second washer 18 are arranged between the locking nut 16 and the first washer 9, the locking nut can adjust the height position on the cock, so that the vertical acting force on the sealing assembly is adjusted, and the plane bearing can ensure the relative rotation of the locking nut and the sealing mechanism.

The inner wall of the valve body 1 and the outer surface of the cock 3 are respectively coated with a bushing 19 to provide sealing performance.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described with reference to the above embodiments, the inventive concept is not limited to the above embodiments, and any modifications using the inventive concept are intended to be included within the scope of the present patent claims.

Claims

1. The utility model provides a plug valve, includes valve body (1), valve gap (2) and cock (3), install in the valve body (1) is rotated in cock (3), its characterized in that: be equipped with gasket (4) between valve gap (2) and cock (3) and valve body (1), be equipped with the pressure assembly who pushes down gasket (4) and seal assembly with the global sealed complex of cock (3) between valve gap (2) circumference inner wall and cock (3) outer wall, pressure assembly and the coaxial setting of seal assembly.

2. The plug valve of claim 1, wherein: the pressure assembly comprises a screw (5) arranged on the valve cover (2), a base plate (6) located below the screw (5) and a pressing plate (7) located below the base plate (6), and a first disc spring (8) abutting against the base plate (6) is arranged between the pressing plate (7) and the base plate (6).

3. The stopcock of claim 1, wherein: the sealing assembly comprises a first gasket (9), a second disc spring (10), a conical seat (11) and a conical ring (12) which are sequentially arranged from top to bottom, wherein a first inclined plane (13) facing the conical ring (12) is arranged at the lower end of the conical seat (11), a second inclined plane (14) in contact fit with the first inclined plane (13) is arranged at the upper end of the conical ring (12), and a sealing ring (15) is arranged between the inner wall of the conical ring (12) and the cock (3).

4. A plug valve according to claim 3, wherein: and a locking nut (16) in threaded fit is arranged on the cock (3), the locking nut (16) is positioned above the first gasket (9), and a plane bearing (17) and a second gasket (18) are arranged between the locking nut and the first gasket.

5. The plug valve of claim 1, wherein: the inner wall of the valve body (1) and the outer surface of the cock (3) are respectively coated with a lining (19).