CN222479473U - A high-sealing butterfly valve suitable for multiple working conditions - Google Patents

Abstract

The utility model provides a multi-working condition applicable high-tightness butterfly valve which comprises a valve body, wherein a butterfly plate is rotatably arranged on the valve body, a valve rod is rotatably arranged on a valve rod seat of the valve body, the valve rod and the butterfly plate are fixedly connected, the integral arrangement of the butterfly valve can have multiple sealing effects, when the lower packing is not tightly sealed, leaked medium can press the middle packing to force the conical packing to enter a conical cavity, the higher the pressure of the medium is, the more tightly between the conical packing and the valve rod, so that the medium leakage is prevented, when the conical packing is not tightly sealed, the leaked medium can enter an annular cavity, the upper packing is forced to expand, the higher the pressure of the medium is, the more tightly between the upper packing and the valve rod cavity and the valve rod is caused, and the medium leakage is prevented.

Description

Multi-station applicable high-tightness butterfly valve

Technical Field

The utility model belongs to the field of butterfly valves, and particularly relates to a multi-working-condition applicable high-tightness butterfly valve.

Background

Butterfly valves are a commonly used type of valve in which a closure member (flap or butterfly plate) is disc-shaped and rotates about a valve axis to effect opening and closing. Butterfly valves mainly play a role in cutting and throttling on pipes, and are fully opened to fully closed, usually less than 90 °. Because the butterfly valve has simple structure, small volume, light weight and convenient operation, the butterfly valve is widely applied to control systems in industries such as petroleum, chemical industry, metallurgy, water treatment, electric power, heating power and the like.

However, in the conventional butterfly valve, the packing is easily sealed in a poor condition during long-time use, so that the leakage problem is caused.

Therefore, it is necessary to provide a multi-station adaptive high-tightness butterfly valve.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a multi-station applicable high-tightness butterfly valve which adopts the technical scheme that the multi-station applicable high-tightness butterfly valve comprises a valve body, wherein a butterfly plate is rotatably arranged in the valve body, a valve rod is rotatably arranged in a valve rod seat of the valve body, and the valve rod is fixedly connected with the butterfly plate;

Preferably, an upper filler, a middle filler and a lower filler are sequentially arranged between the valve rod and the valve rod seat from top to bottom, and a filler gland is arranged between the valve rod and the valve rod seat;

Preferably, a valve rod cavity is arranged in the valve rod seat in a penetrating way, a conical cavity and a limiting cavity are arranged in the valve rod seat, and the conical cavity is arranged above the limiting cavity;

Preferably, the valve rod, the upper packing and the lower packing are rotatably arranged in a valve rod cavity, the middle packing is rotatably and elastically slidably arranged in a conical cavity and a limit cavity, and the packing gland is fixedly arranged in the valve rod cavity;

Preferably, the middle packing comprises a conical packing, and the bottom of the conical packing is provided with an integrated round packing;

Preferably, the conical packing and the circular packing are sleeved on the valve rod, and the conical packing and the circular packing are connected with the valve rod in a sliding way;

Preferably, the conical packing and the circular packing are slidably mounted in the conical cavity and the limiting cavity, and the conical head of the conical packing is positioned in the conical cavity.

Preferably, the bottom of the round packing is provided with an integrated corrugated sleeve, the corrugated sleeve is elastically sleeved on the valve rod in a sliding manner, the bottom of the corrugated sleeve is provided with an integrated nut, and the nut is fixedly connected with the valve rod through threads.

Preferably, the outer surface of the valve rod is uniformly provided with an upper thread, a middle thread and a lower thread in sequence from top to bottom, the upper filler is fixedly connected with the upper thread, the nut is fixedly connected with the middle thread, and the lower filler is fixedly connected with the lower thread.

Preferably, the bottom of the upper filler is provided with an annular cavity.

Compared with the prior art, the utility model has the advantages that:

the utility model has multiple sealing effects through the integral arrangement, when the lower packing is not tightly sealed, the leaked medium can press the middle packing, the conical packing is forced to enter the conical cavity, the medium pressure is higher, the conical packing, the conical cavity and the valve rod are more tightly arranged, so that the medium leakage is prevented, when the conical packing is not tightly sealed, the leaked medium enters the annular cavity, the upper packing is forced to expand, the medium pressure is higher, and the upper packing is more tightly arranged between the upper packing and the valve rod cavity and between the upper packing and the valve rod, so that the medium leakage is prevented.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic view of a partially cut-away structure of the present utility model.

FIG. 3 is a schematic diagram of the explosive structures of the valve stem, upper packing, conical packing, round packing and lower packing of the present utility model.

Fig. 4 is a schematic view of the internal structure of the valve stem block of the present utility model.

Fig. 5 is a schematic view of the partial enlarged structure at a of the present utility model.

In the figure:

Valve body 1, valve rod seat 2, valve rod chamber 21, conical chamber 22, spacing chamber 23, butterfly plate 3, valve rod 4, upper screw 41, intermediate screw 42, lower screw 43, upper packing 5, ring chamber 6, conical packing 7, circular packing 8, bellows 9, nut 10, lower packing 11, gland 12.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution of the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the description of the embodiments, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "configured to," "connected," and the like are to be construed broadly, as for example, "connected" may be a fixed connection, may be a removable connection, or may be an integral connection, may be a mechanical connection or may be an electrical connection, may be a direct connection, may be an indirect connection via an intermediary, or may be a communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is further described below with reference to the accompanying drawings:

Example 1

1-5, A multi-working condition applicable high-tightness butterfly valve comprises a valve body 1, wherein a butterfly plate 3 is rotatably arranged on the valve body 1, a valve rod 4 is rotatably arranged on a valve rod seat 2 of the valve body 1, and the valve rod 4 is fixedly connected with the butterfly plate 3;

the valve rod 4 and the valve rod seat 2 are sequentially provided with a packing gland 12, an upper packing 5, a middle packing and a lower packing 11 from top to bottom, the sealing performance between the valve rod 4 and the valve rod seat 2 is improved through the arrangement of the upper packing 5, the middle packing and the lower packing 11, and the stability of the upper packing 5, the middle packing and the lower packing 11 is ensured through the arrangement of the packing gland 12, the packing gland 12 is fixedly connected with the valve rod seat 2, and the packing gland 12 is rotationally connected with the valve rod 4;

The valve rod seat 2 is internally provided with a valve rod cavity 21 in a penetrating way, the valve rod seat 2 is internally provided with a conical cavity 22 and a limiting cavity 23, through the arrangement of the conical cavity 22 and the limiting cavity 23, not only can a displacement space be provided for the middle packing, but also friction between the conical packing 7 and the conical cavity 22 can be prevented in the process that the middle packing rotates along with the valve rod 4, so that abrasion of the conical packing 7 is avoided, the conical cavity 22 is arranged above the limiting cavity 23, the valve rod cavity 21, the conical cavity 22 and the limiting cavity 23 are communicated, and the valve rod cavity 21, the conical cavity 22 and the limiting cavity 23 are coaxial;

The middle packing comprises a conical packing 7, when the lower packing 11 is not tightly sealed and medium leakage occurs, the leaked medium can push the conical packing 7 to be in close contact with the conical cavity 22, so that better sealing performance is achieved between the conical packing 7 and the conical cavity 22, the bottom of the conical packing 7 is provided with an integrated round packing 8, the sealing performance between the conical packing and the limiting cavity 23 can be ensured, and meanwhile, when the medium leakage occurs, the conical packing 7 can be in large-area contact with the leaked medium so as to be jacked by the medium, and the top end of the round packing 8 can plug the bottom of the conical cavity 22 by means of the pressure of the medium;

The conical packing 7 and the circular packing 8 are slidably arranged in the conical cavity 22 and the limit cavity 23, and the conical head of the conical packing 7 is positioned in the conical cavity 22, and the fact that the outer surface of the conical packing 7 is not contacted with the inner surface of the conical cavity 22 under normal conditions is needed to be noted, and the top end of the circular packing 8 is not contacted with the upper part of the limit cavity 23, so that the conical packing 7 and the top end of the circular packing 8 can be prevented from being worn in the normal rotation process of the valve rod 4, and the overall service life is prolonged.

The bottom of the round packing 8 is provided with an integrated corrugated sleeve 9, when the round packing 8 is subjected to pressure of leaked media through the arrangement of the corrugated sleeve 9, the round packing 8 and the conical packing 7 can have up-and-down movement capability, the corrugated sleeve 9 is elastically and slidably sleeved on the valve rod 4, the bottom of the corrugated sleeve 9 is provided with an integrated nut 10, stability and tightness between the middle packing and the valve rod 4 can be ensured through the arrangement of the nut 10, leakage of the leaked media from the middle packing and the valve rod 4 is avoided, and the nut 10 is fixedly connected with the valve rod 4 through threads.

The outer surface of the valve rod 4 is provided with an upper thread 41, a middle thread 42 and a lower thread 43 which are uniformly distributed in sequence from top to bottom, the upper packing 5 is fixedly connected with the upper thread 41, the nut 10 is fixedly connected with the middle thread 42, the lower packing 11 is fixedly connected with the lower thread 43, and the upper packing 5, the middle packing and the lower packing 11 are conveniently assembled and disassembled through the arrangement of the upper thread 41, the middle thread 42 and the lower thread 43.

The bottom of the upper packing 5 is provided with the annular cavity 6, so that when the middle packing leaks, a leaked medium can enter the annular cavity 6 to force the expansion of the upper packing 5, and the upper packing 5 is more tightly connected with the valve rod 4 and the valve rod cavity 21, so that the medium leakage is prevented.

In this embodiment, when the seal of the lower packing 11 is not tight, the leaked medium will enter the limiting cavity 23 and exert pressure on the round packing 8, so that the round packing 8 drives the conical packing 7 to move upwards, the conical packing 7 enters the conical cavity 22, the top end of the round packing 8 seals the bottom of the conical cavity 22, the pressure of the leaked medium is higher, the conical packing 7 is tighter between the conical cavity 22 and the valve rod 4, so as to prevent the medium leakage, when the seal of the round packing 8 and the conical packing 7 is not tight, the leaked medium will enter the annular cavity 6, the upper packing 5 is forced to expand, the pressure of the medium is higher, the upper packing 5 is expanded more tightly between the upper packing 5 and the valve rod cavity 22 and the valve rod 4, so that the medium leakage is prevented.

By utilizing the technical scheme of the utility model or under the inspired by the technical scheme of the utility model, a similar technical scheme is designed by a person skilled in the art, so that the technical effects are achieved, and the technical scheme falls into the protection scope of the utility model.

Claims (4)

1. The multi-working-condition applicable high-tightness butterfly valve is characterized by comprising a valve body (1), wherein a butterfly plate (3) is rotatably arranged in the valve body (1), a valve rod (4) is rotatably arranged in a valve rod seat (2) of the valve body (1), and the valve rod (4) is fixedly connected with the butterfly plate (3);

A packing gland (12), an upper packing (5), a middle packing and a lower packing (11) are sequentially arranged between the valve rod (4) and the valve rod seat (2) from top to bottom, the packing gland (12) is fixedly connected with the valve rod seat (2), and the packing gland (12) is rotationally connected with the valve rod (4);

The valve rod seat (2) is internally provided with a valve rod cavity (21) in a penetrating way, and the valve rod seat (2) is internally provided with a conical cavity (22) and a limiting cavity (23), wherein the conical cavity (22) is arranged above the limiting cavity (23);

The valve rod (4), the upper packing (5) and the lower packing (11) are rotatably arranged in a valve rod cavity (21), and the middle packing is rotatably and elastically slidably arranged in a conical cavity (22) and a limit cavity (23), and the packing gland (12) is fixedly arranged in the valve rod cavity (21);

The middle packing comprises a conical packing (7), and an integrated round packing (8) is arranged at the bottom of the conical packing (7);

The conical filler (7) and the round filler (8) are sleeved on the valve rod (4), and the conical filler (7) and the round filler (8) are connected with the valve rod (4) in a sliding manner;

The conical packing (7) and the round packing (8) are slidably arranged in the conical cavity (22) and the limiting cavity (23), and the conical head of the conical packing (7) is positioned in the conical cavity (22).

2. The multi-working-condition applicable high-tightness butterfly valve of claim 1 is characterized in that an integrated corrugated sleeve (9) is arranged at the bottom of the circular packing (8), the corrugated sleeve (9) is elastically and slidingly sleeved on the valve rod (4), an integrated nut (10) is arranged at the bottom of the corrugated sleeve (9), and the nut (10) is fixedly connected with the valve rod (4) through threads.

3. The multi-working-condition applicable high-tightness butterfly valve is characterized in that an upper thread (41), a middle thread (42) and a lower thread (43) are sequentially and uniformly distributed on the outer surface of the valve rod (4) from top to bottom, the upper filler (5) is fixedly connected with the upper thread (41), the nut (10) is fixedly connected with the middle thread (42), and the lower filler (11) is fixedly connected with the lower thread (43).

4. A multi-working condition applicable high-tightness butterfly valve as in claim 3 wherein the bottom of the upper packing (5) is provided with an annular cavity (6).