CN206563094U - A kind of high sealing fire resisting plug valve - Google Patents

Abstract

The utility model is related to a kind of high sealing fire resisting plug valve, and it includes valve body, bonnet, the cock being arranged in valve body, the valve rod being fixedly connected with the cock, the tap handle being fixedly connected with the valve rod and sealing device.Wherein, the sealing device being arranged between the cock and the valve body is bushing, the sealing device being arranged between the valve body and the bonnet is plain washer, three square rings, V pads, VA pads, the sealing device for being arranged on intracavitary in the bonnet is pressure rings and pressure disc, pressure suffered by it passes through adjusting screw control, filler is further filled with cavity between pressure rings and pressure disc, valve bonnet seal circle is provided with below bonnet.Plug valve good seal performance of the present utility model, is applicable to poisonous high volatile medium, excellent fire retarding performance.

Description

A high-tight refractory plug valve

technical field

The utility model relates to a plug valve, in particular to a high-sealing fire-resistant plug valve.

Background technique

The plug valve is a valve that communicates or separates the fluid passage port on the plug and the fluid passage port on the valve body by rotating the plug, so as to realize opening or closing to control the circulation and closure of the fluid. The shape of the plug can be cylindrical or conical shape. The fluid channel of a cylindrical cock is generally rectangular, and the fluid channel of a conical cock is generally trapezoidal. The special structure of the plug valve makes it have the characteristics of simple structure, rapid opening and closing, and small fluid resistance. It is suitable for cutting off, connecting and shunting the medium, and sometimes it can also be used for throttling.

The plug valves of the prior art generally only have a bushing between the valve body and the plug, and there is no or only a small amount of seals between the valve body and the valve cover. Such a sealing device is difficult to meet the requirements of toxic and highly volatile media. Occasions with high sealing performance requirements; and some working conditions have fire resistance requirements for the sealing device, but the bushing material of the existing sealing device is polytetrafluoroethylene, which cannot meet the fire resistance requirements.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a high-tight fire-resistant plug valve, which can meet the occasions of transporting fluids with high sealing requirements, such as toxic and highly volatile substances, and has excellent fire resistance.

In order to achieve the above object, the utility model adopts the following technical solutions:

According to a specific embodiment of the present invention, a high-seal fire-resistant plug valve is provided, which includes a valve body, a valve cover, a cock arranged in the valve body, a valve stem fixedly connected to the cock, and the The valve stem is fixedly connected to the cock handle and the sealing device. Wherein, the sealing device includes a bushing arranged between the cock and the valve body, a flat gasket, a triangular ring, a V gasket, and a VA gasket arranged between the valve body and the valve cover. , a pressure ring and a pressure plate arranged in the inner cavity of the valve cover, and the cavity between the pressure ring and the pressure plate is further filled with filler.

According to an embodiment of the utility model, the high-seal fire-resistant plug valve, wherein, the valve body is composed of a hollow central cylinder and flanges arranged at both ends of the central cylinder.

According to an embodiment of the utility model, the high-seal fire-resistant plug valve, wherein, the central cylinder and the flange are integrally formed.

According to an embodiment of the utility model, the high-seal fire-resistant cock valve, wherein the cock is cylindrical, and the cross-section of the fluid passage provided in the cock is rectangular.

According to an embodiment of the utility model, the high-seal fire-resistant plug valve, wherein the filler is graphite.

According to an embodiment of the utility model, the high-seal fire-resistant plug valve, wherein, when the long axis direction of the cock handle is parallel to the long axis direction of the middle cylinder, the fluid passage and the middle cylinder The lumen is open to allow passage of fluid.

According to an embodiment of the utility model, the high-seal fire-resistant cock valve, wherein, the cock handle can be rotated 90° from a direction parallel to the long axis of the middle cylinder to either the left or the right, so as to close the the fluid pathway.

According to an embodiment of the utility model, the high-seal fire-resistant cock valve, wherein the cock handle is set to only rotate 90° from a direction parallel to the long axis of the middle cylinder to either the left or the right , to close the fluid pathway.

According to an embodiment of the utility model, the high-seal fire-resistant plug valve, wherein the pressure on the pressure ring and the pressure plate is controlled by adjusting screws.

According to an embodiment of the utility model, a high-seal fire-resistant plug valve, wherein a valve cover sealing ring is further provided under the valve cover.

The high-sealing fire-resistant plug valve provided by the utility model can be applied to the occasion of transporting fluids with high sealing requirements, such as toxic and highly volatile substances, and has excellent fire-resistant performance, effectively ensuring safety.

Description of drawings

Fig. 1 is the three-dimensional view (partial cut-away view) of high sealing refractory cock valve of the present utility model;

Fig. 2 is a partially enlarged view of the peripheral area of the pressure plate of the high-seal refractory plug valve of the present invention.

Explanation of reference signs:

1. Valve body;

2. Bushing;

3. Cock;

4. Bonnet;

5. Flat washer;

6. V gasket;

7. VA gasket;

8. Triangular ring;

9. Pressure ring;

10. Filler;

11. Pressure plate;

12. Valve stem;

13. Cock handle;

14. Central column;

15. Flange;

16. Adjusting screw;

17. Bonnet seal.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1 and 2, the high-seal fire-resistant plug valve of the present invention includes a valve body 1, a valve cover 4, a cock 3 arranged in the valve body 1, a valve stem 12 fixedly connected to the cock 3, and a valve stem 12 Fixedly connected cock handle 13, sealing device.

Among them, the sealing device includes a bushing 2 arranged between the cock 3 and the valve body 1, a flat gasket 5, a triangular ring 8, a V gasket 6, and a VA gasket 7 arranged between the valve body 1 and the valve cover 4, The pressure ring 9 and the pressure plate 11 are arranged in the inner cavity of the valve cover 4 , and the cavity between the pressure ring 9 and the pressure plate 11 is further filled with packing 10 . The sealing device reliably improves the sealing performance of the plug valve and is applicable to toxic and highly volatile media. The valve body 1 is composed of a hollow cylinder 14 and flanges 15 arranged on both ends of the cylinder 14 . The cock 3 is cylindrical, and the cross section of the fluid channel arranged in the cock 3 is rectangular.

In a further preferred embodiment, the central cylinder 14 and the flange 15 are integrally formed.

In a further preferred embodiment, the pressure on the pressure plate 11 and the pressure ring 9 is adjusted by adjusting the screw 17, thereby adjusting the pressure on the V gasket 6, the VA gasket 7, the packing 10 and the triangular ring 8, Keep a moderate seal.

In a further preferred embodiment, a valve cover sealing ring 17 is further provided on the valve cover to further ensure the sealing of the valve cover 4 .

In a further preferred embodiment, the filler 10 is graphite, and the bushing 2, flat washer 5, triangular ring 8 and graphite filler in the sealing device can effectively improve the fire resistance of the plug valve. In addition, the filler 10 can not only prevent the medium from leaking from the valve cover 4 and the valve stem 12 and play a good sealing role, but also effectively improve the fire resistance of the plug valve.

Continuing to refer to FIG. 1 , at this time, the long axis direction of the cock handle 13 is parallel to the long axis direction of the middle cylinder, and the fluid passage provided in the cock 3 communicates with the inner cavity of the middle cylinder 14 to allow fluid to pass through.

When it is necessary to reduce the fluid flow, the cock handle 13 is rotated from the direction parallel to the long axis of the middle cylinder 14 shown in FIG. Go to the inner cavity of the middle cylinder 14 gradually, and block the fluid. When it is necessary to completely shut off the fluid, it can be rotated 90°.

According to an embodiment of the present invention, the cock handle 13 is configured to only rotate 90° to the left or right from a direction parallel to the long axis of the central cylinder 14, so as to close the fluid passage.

The above descriptions are only preferred embodiments of the present utility model, and are not used to limit the implementation scope of the present utility model; if the utility model is modified or equivalently replaced without departing from the spirit and scope of the present utility model, all should be covered by this utility model. within the protection scope of utility model claims.

Claims (10)

1. A high sealing refractory plug valve, characterized in that it comprises a valve body, a valve cover, a cock arranged in the valve body, a valve stem fixedly connected with the cock, and a cock handle fixedly connected with the valve stem and sealing devices, Wherein, the sealing device includes a bushing arranged between the cock and the valve body, a flat gasket, a triangular ring, a V gasket, and a VA gasket arranged between the valve body and the valve cover. , a pressure ring and a pressure plate arranged in the inner cavity of the valve cover, and the cavity between the pressure ring and the pressure plate is further filled with filler. 2. The high-seal fire-resistant plug valve according to claim 1, wherein the valve body is composed of a hollow central cylinder and flanges arranged on both ends of the central cylinder. 3. The high-seal fire-resistant plug valve according to claim 2, wherein the central cylinder and the flange are integrally formed. 4. The high-seal fire-resistant plug valve according to claim 2, characterized in that, the plug is cylindrical, and the cross-section of the fluid passage arranged in the plug is rectangular. 5. The high-seal fire-resistant plug valve according to claim 1 or 2, characterized in that the filler is graphite. 6. The high-seal refractory plug valve according to claim 4, characterized in that, when the direction of the long axis of the cock handle is parallel to the direction of the long axis of the middle cylinder, the fluid path and the middle cylinder The lumen of the body is connected to allow the passage of fluid. 7. The high-seal fire-resistant plug valve according to claim 4, wherein the plug handle can be rotated 90° from a direction parallel to the long axis of the middle cylinder to either the left or the right, so as to Close the fluid pathway. 8. The high-seal refractory plug valve according to claim 4, characterized in that, the plug handle is set to only rotate from a direction parallel to the long axis of the middle cylinder to either the left or the right direction 90° to close the fluid pathway. 9. The high-seal fire-resistant plug valve according to claim 1 or 2, characterized in that the pressure on the pressure ring and the pressure plate is controlled by adjusting screws. 10. The high-seal fire-resistant plug valve according to claim 1 or 2, characterized in that a valve cover sealing ring is further provided under the valve cover.