CN219013384U

CN219013384U - Leak-proof pneumatic butterfly valve

Info

Publication number: CN219013384U
Application number: CN202223505341.3U
Authority: CN
Inventors: 贺建平; 田景行
Original assignee: Zhongshan Kelio Mechanical Equipment Co ltd
Current assignee: Zhongshan Kelio Mechanical Equipment Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-12
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a leakage-proof pneumatic butterfly valve, which comprises a butterfly valve seat with a valve body channel, and a circular butterfly plate movably arranged in the valve body channel; the pneumatic assembly is arranged on the butterfly valve seat, the circular butterfly plate is driven by the valve rod to open and close the valve body channel, the butterfly valve seat is provided with an annular sealing groove, the annular sealing groove is embedded with an elastic sealing ring, and the annular sealing groove is communicated with the connecting air channel; the pneumatic assembly is provided with a bypass air passage, the bypass air passage is connected with the connecting air passage, and air pressure can be formed towards the annular sealing groove so as to drive the sealing ring to deform towards the valve body passage and locally bulge and prop against the outer edge of the circular butterfly plate. According to the utility model, the bypass air passage of the pneumatic assembly can provide driving air pressure for the connecting air passage, so that the sealing ring in the annular sealing groove deforms towards the valve body passage in the butterfly valve seat and partially protrudes, and the effect of secondarily sealing and compacting the circular butterfly plate is achieved by propping against the outer edge of the circular butterfly plate.

Description

Leak-proof pneumatic butterfly valve

Technical Field

The utility model relates to the technical field of butterfly valves, in particular to a leakage-proof pneumatic butterfly valve.

Background

The pneumatic butterfly valve consists of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is a pneumatic valve which uses a circular butterfly plate rotating along with a valve rod to perform opening and closing, so as to realize starting action, is mainly used as a cut-off valve, and can also be designed to have the function of adjusting or adjusting a section valve.

The existing pneumatic butterfly valve is simple in general structure, in the long-term use process, the outer edge of the butterfly plate of the butterfly valve is frequently rubbed with the valve body channel, abrasion phenomenon which is difficult to avoid is caused, the blocking performance of the butterfly plate on the valve body channel is reduced, and fluid in the valve body channel overflows.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a leakage-proof pneumatic butterfly valve.

The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows: a leak-proof pneumatic butterfly valve comprises a butterfly valve seat with a valve body channel, and a circular butterfly plate movably arranged in the valve body channel; the pneumatic assembly is arranged on the butterfly valve seat, the circular butterfly plate is driven by the valve rod to open and close the valve body channel, the butterfly valve seat is provided with an annular sealing groove, an elastic sealing ring is embedded in the annular sealing groove, and the annular sealing groove is communicated with a connecting air passage; the pneumatic assembly is provided with a bypass air passage, the bypass air passage is connected with the connecting air passage, and air pressure can be formed towards the annular sealing groove, so that the sealing ring is driven to deform towards the valve body passage and partially protrude, and is propped against the outer edge of the circular butterfly plate.

Optionally, one side that annular seal groove is close to circular butterfly plate is provided with the receipts narrow mouth, the sealing ring can locally bulge the narrow mouth, and can't break away from completely annular seal groove.

Optionally, the valve rod is arranged in the center of the butterfly valve seat and is positioned at one side of the valve body channel; the annular seal groove and the seal ring are provided with two groups, and are oppositely arranged on two sides of the valve rod.

Optionally, a sliding plug is arranged in the connecting air passage.

Optionally, the air inlet end of the connecting air flue is provided with a plugging terminal.

Optionally, the pneumatic assembly is further provided with a rotating handle, and the rotating handle can drive the valve rod to rotate.

The utility model has the beneficial effects that: the bypass air passage of the pneumatic assembly can provide driving air pressure for the connecting air passage, so that the sealing ring in the annular sealing groove deforms towards the valve body channel in the butterfly valve seat and partially protrudes, and the effect of secondarily sealing and compacting the circular butterfly plate is achieved by propping against the outer edge of the circular butterfly plate. Even if the outer edge of the circular butterfly plate is worn locally, the elastic sealing ring can deform and be attached to the compressed worn part, so that the effective sealing and leakage preventing effects are achieved, the blocking capacity of the butterfly plate to the valve body channel is ensured, and the overflow leakage phenomenon of the valve body channel at the circular butterfly plate is effectively reduced.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of the leak-proof pneumatic butterfly valve of the present utility model;

fig. 2 is an enlarged schematic view at a in fig. 1.

Description of main reference numerals:

10. a butterfly valve seat; 11. a valve body passage; 12. an annular seal groove; 13. connecting an air passage; 14. narrowing the mouth; 20. a circular butterfly plate; 30. a pneumatic assembly; 31. a bypass airway; 40. a valve stem; 50. a seal ring; 60. a sliding plug; 70. plugging the terminal; 80. the handle is turned.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Examples

Referring to fig. 1 and 2, the utility model provides a leak-proof pneumatic butterfly valve, which comprises a butterfly valve seat 10 with a valve body channel 11, and a circular butterfly plate 20 movably arranged in the valve body channel 11; the pneumatic assembly 30 is arranged on the butterfly valve seat 10, the circular butterfly plate 20 is driven by the valve rod 40 to open and close the valve body channel 11, the butterfly valve seat 10 is provided with an annular sealing groove 12, the annular sealing groove 12 is embedded with an elastic sealing ring 50, and the annular sealing groove 12 is communicated with the connecting air channel 13; the pneumatic assembly 30 is provided with a bypass air passage 31, the bypass air passage 31 is connected with the connecting air passage 13, and air pressure can be formed towards the annular sealing groove 12 to drive the sealing ring 50 to deform towards the valve body channel 11 and partially bulge, and the sealing ring is pressed against the outer edge of the circular butterfly plate 20.

In the utility model, the bypass air passage 31 of the pneumatic assembly 30 can provide driving air pressure for the connecting air passage 13, so that the sealing ring 50 in the annular sealing groove 12 deforms and partially protrudes towards the valve body channel 11 in the butterfly valve seat 10, and the effect of secondarily sealing and compacting the circular butterfly plate 20 is achieved by pressing the outer edge of the circular butterfly plate 20. Even if the outer edge of the circular butterfly plate 20 is worn locally, the elastic sealing ring 50 can deform and be attached to and pressed against the worn part, so that an effective sealing and leakage-proof effect is achieved, the blocking capability of the butterfly plate to the valve body channel 11 is ensured, and the overflow leakage phenomenon of the valve body channel 11 at the circular butterfly plate 20 is effectively reduced.

Specifically, the annular seal groove 12 is provided with a narrowing opening 14 on a side close to the circular butterfly plate 20, and the seal ring 50 may partially protrude out of the narrowing opening 14 and cannot be completely separated from the annular seal groove 12. By narrowing the mouth 14, the seal ring 50 is prevented from disengaging the annular seal groove 12. During specific assembly, the connecting air passage 13 is connected with a vacuum negative pressure machine, vacuum negative pressure is formed in the annular sealing groove 12, and the sealing ring 50 is pressed into the annular sealing groove 12 from the position of the narrow-down opening 14 through an assembly tool, so that assembly is completed.

In this embodiment, the valve stem 40 is disposed in the center of the butterfly valve seat 10 on one side of the valve body passage 11; the annular seal groove 12 and the seal ring 50 are provided in two groups, and are disposed on opposite sides of the valve stem 40. When the butterfly plate rotates to a sealing state, the two groups of annular sealing grooves 12 and the sealing rings 50 are correspondingly arranged on two sides of the butterfly plate, and the outer edges of the circular butterfly plate 20 can be pressed from the two sides, so that an effective sealing and leakage-preventing effect is achieved.

In the present embodiment, a slide plug 60 is provided in the connection air passage 13. The bypass air passage 31 of the pneumatic assembly 30 forms air pressure to push the sliding plug 60 in the connecting air passage 13 to move towards the annular sealing groove 12, so that air or fluid in the annular sealing groove 12 is compressed, and the sealing ring 50 is deformed towards the valve body channel 11 of the butterfly valve seat 10 and partially protrudes to press against the outer edge of the butterfly plate.

Specifically, a blocking terminal 70 is provided at the air inlet end of the connection air duct 13. The blocking terminal 70 may block the air inlet end of the connecting air passage 13 and provide a connection mechanism to the bypass air passage 31 of the pneumatic assembly 30. In the assembly, the sliding plug 60 is slidably mounted in the connection air passage 13, and the sliding plug 60 is mounted in the connection air passage 13 by locking the stopper terminal 70.

In this embodiment, the pneumatic assembly 30 is further provided with a rotary handle 80, and the rotary handle 80 can drive the valve rod 40 to rotate. When the pneumatic assembly 30 is damaged or fails, the user can manually rotate the valve stem 40 by rotating the handle 80, thereby rotating the circular butterfly plate 20 to open or close the valve body passage 11.

When the valve body channel 11 is required to be opened in specific use, a user can drive the valve rod 40 to rotate by the channel pneumatic assembly 30, and can turn the valve rod 40 by rotating the handle 80 to turn the round butterfly plate 20 open so as to conduct the valve body channel 11; after the valve body is closed, the bypass air passage 31 of the pneumatic assembly 30 is opened, air pressure is formed towards the connecting air passage 13, the sliding plug 60 in the connecting air passage 13 is pushed to move towards the annular sealing groove 12, so that gas or fluid in the annular sealing groove 12 is compressed, the sealing ring 50 is deformed and partially protrudes towards the valve body channel 11 of the butterfly valve seat 10, the outer edge of the circular butterfly plate 20 is pressed, an effective sealing and leakage preventing effect is achieved, and the overflow leakage phenomenon of the valve body channel 11 at the circular butterfly plate 20 is effectively reduced.

Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. A leak-proof pneumatic butterfly valve comprises a butterfly valve seat (10) with a valve body channel (11), and a circular butterfly plate (20) movably arranged in the valve body channel (11); the pneumatic assembly (30) is arranged on the butterfly valve seat (10), drives the circular butterfly plate (20) through the valve rod (40) and can open and close the valve body channel (11), and is characterized in that: an annular sealing groove (12) is formed in the butterfly valve seat (10), an elastic sealing ring (50) is embedded in the annular sealing groove (12), and the annular sealing groove (12) is communicated with a connecting air passage (13); the pneumatic assembly (30) is provided with a bypass air passage (31), the bypass air passage (31) is connected with the connecting air passage (13) and can form air pressure towards the annular sealing groove (12), so that the sealing ring (50) is driven to deform and locally bulge towards the valve body channel (11) and is pressed against the outer edge of the circular butterfly plate (20).

2. The leak resistant pneumatic butterfly valve of claim 1, wherein: one side of the annular sealing groove (12) close to the circular butterfly plate (20) is provided with a narrowing opening (14), and the sealing ring (50) can partially protrude out of the narrowing opening (14) and cannot be completely separated from the annular sealing groove (12).

3. The leak resistant pneumatic butterfly valve of claim 1, wherein: the valve rod (40) is arranged in the center of the butterfly valve seat (10) and is positioned at one side of the valve body channel (11); the annular sealing groove (12) and the sealing ring (50) are provided with two groups, and are oppositely arranged on two sides of the valve rod (40).

4. The leak resistant pneumatic butterfly valve of claim 1, wherein: a sliding plug (60) is arranged in the connecting air passage (13).

5. The leak resistant pneumatic butterfly valve of claim 4, wherein: the air inlet end of the connecting air passage (13) is provided with a plugging terminal (70).

6. The leak resistant pneumatic butterfly valve of claim 1, wherein: the pneumatic assembly (30) is further provided with a rotating handle (80), and the rotating handle (80) can drive the valve rod (40) to rotate.