Air bag type fluid block valve

Abstract

The utility model relates to an air bag type fluid block valve. The device is suitable for the technical field of pipeline supply cut-off equipment. According to the technical scheme, the air bag type fluid block valve is characterized in that the air bag type fluid block valve is provided with a valve seat, an air bag is installed on the inner wall of the valve seat, an air pipe is connected to the air bag, and the air pipe extends out of the valve seat and is communicated with an air source. Thus, when the pipeline needs to be cut off, air is supplied to the air bag in the cut-off valve installed on the pipeline, the air bag can be rapidly inflated and cut off, and due to the fact that the air bag has high elasticity in the inflation process, the good buffering effect on fluid in the pipeline is achieved, and the water hammer phenomenon can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to an airbag type fluid cut-off valve, which is applicable to the technical field of pipeline supply cut-off equipment. Background Art

[0002] In urban water supply, industrial water, chemical fuel supply and other applications, when a leak or disaster occurs in the system, it is necessary to quickly cut off the fluid in the pipeline. Currently, the commonly used emergency shut-off devices include electric valves, pneumatic valves and other types. According to relevant specifications, the time for the emergency shut-off valve to be fully opened or fully closed by a pneumatic or electric actuator should not exceed 3 minutes. If a minor leak occurs in the system, cutting off the fluid within 3 minutes can effectively prevent waste of resources and expansion of disasters; if a more harmful leak or disaster occurs in the system, means and methods of cutting off the fluid more quickly should be considered. However, when the liquid supply pipeline is quickly cut off, water hammer is likely to occur in the pipeline, which will cause greater damage to the pipeline. Utility Model Content

[0003] The technical problem to be solved by the utility model is: In order to solve the above technical problem, the utility model provides a

[0004] The technical solution adopted by the utility model is: an airbag type fluid shut-off valve, characterized in that: it has a valve seat, an airbag is installed on the inner wall of the valve seat, an air pipe is connected to the airbag, the air pipe extends out of the valve seat and is connected to the air source. In this way, when it is necessary to cut off the pipeline, the airbag can be quickly inflated and cut off by supplying air to the airbag in the shut-off valve installed on the pipeline, and because the airbag has strong elasticity during the inflation process, it plays a good buffering role on the fluid in the pipeline, and can effectively avoid the occurrence of water hammer phenomenon.

[0005] A mounting hole is formed on the valve seat, a valve cover is mounted at a position corresponding to the mounting hole on the valve seat, the air bag is mounted on the valve cover, the air pipe passes through the valve cover, and the valve cover and the valve seat are connected by bolts. In this way, when the cut-off valve is damaged, the valve cover can be removed from the valve seat by loosening the bolts between the valve cover and the valve seat, and the inside of the valve seat can be inspected.

[0006] A sealing ring is provided at the connection between the valve cover and the valve seat, and a sealing ring is provided at the connection between the air pipe and the valve cover. In this way, the sealing performance of the cut-off valve is improved, and the fluid is prevented from being discharged from the gap between the valve cover and the valve seat and between the valve cover and the air pipe.

[0007] The valve cover is provided with a groove on the end surface facing the valve seat, and the contracted airbag is arranged in the groove of the valve cover. In this way, when the airbag is retracted, the airbag is arranged in the groove of the valve seat, which can effectively alleviate the impact of the contracted airbag on the fluid in the pipeline.

[0008] Both ends of the valve seat are provided with flanges, so that the valve seat can be conveniently connected to a pipeline through the flanges.

[0009] The beneficial effects of the utility model are as follows: the utility model arranges an airbag in the shut-off valve, so that air is supplied to the airbag through an air source when the pipeline needs to be shut off, so that the airbag expands quickly and shuts off the valve seat; the airbag has strong elasticity during the expansion process, plays a good buffering role for the flow in the pipeline, and can effectively avoid the occurrence of water hammer; the utility model arranges a valve cover on the valve seat, so that the shut-off valve can be inspected and repaired by opening the valve cover; the utility model installs the airbag in a groove on the valve cover, so that the airbag that is contracted when the pipeline is in normal use is arranged in the groove, avoiding the airbag from affecting the fluid in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 : A schematic diagram of the structure of the airbag when it is not inflated in the utility model.

[0011] Figure 2 : A schematic diagram of the structure of the airbag when it is inflated in the utility model.

[0012] In the figure: 1. valve seat; 2. valve cover; 3. air bag; 4. bolt; 5. air pipe. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0014] This embodiment is an airbag 3-type fluid shut-off valve, which has a valve seat 1. Both ends of the valve seat 1 are provided with flanges, and the valve seat 1 can be connected to a pipeline through the flanges.

[0015] In this embodiment, a mounting hole is formed on the valve seat 1, a valve cover 2 is mounted on the valve seat 1, the valve cover 2 is arranged at the mounting hole position on the valve seat 1, the valve seat 1 and the valve cover 2 are connected by bolts 4, and a sealing ring is arranged at the connection between the valve seat 1 and the valve cover 2. In this way, by loosening the bolts 4 between the valve seat 1 and the valve cover 2, it is convenient to remove the valve cover 2 from the valve seat 1, so as to facilitate the maintenance of the valve seat 1, and the sealing ring between the valve cover 2 and the valve seat 1 can effectively prevent the fluid in the pipeline from flowing out through the gap between the valve cover 2 and the valve seat 1.

[0016] In this embodiment, a groove is formed on the end surface of the valve cover 2 facing the valve seat 1, and the contracted airbag 3 is arranged in the groove of the valve cover 2. The airbag 3 is connected to the air pipe 5, which passes through the valve cover 2 and is connected to the air source, and a sealing ring is arranged between the valve cover 2 and the air pipe 5. In this way, when the pipeline with the cut-off valve installed is operating normally, the airbag 3 contracted in the groove of the valve cover 2 can effectively avoid the influence on the fluid flowing through the cut-off valve, and when the valve cover 2 is removed from the valve seat 1, the airbag 3 is taken out from the valve seat 1 along with the valve cover 2, so as to facilitate the maintenance of the airbag 3. The sealing ring between the valve cover 2 and the air pipe 5 can effectively prevent the fluid in the pipeline from flowing out through the gap between the valve cover 2 and the air pipe 5.

[0017] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An airbag type fluid shut-off valve, characterized in that: A valve seat (1) is provided, an air bag (3) is installed on the inner wall of the valve seat (1), an air pipe (5) is connected to the air bag (3), and the air pipe (5) extends out of the valve seat (1) and is connected to an air source; A mounting hole is formed on the valve seat (1), a valve cover (2) is mounted at a position corresponding to the mounting hole on the valve seat (1), the air bag (3) is mounted on the valve cover (2), the air pipe (5) passes through the valve cover (2), and the valve cover (2) and the valve seat (1) are connected via bolts (4).

2. The airbag type fluid shut-off valve according to claim 1, characterized in that: A sealing ring is provided at the connection between the valve cover (2) and the valve seat (1), and a sealing ring is provided at the connection between the air pipe (5) and the valve cover (2).

3. The airbag type fluid shut-off valve according to claim 1, characterized in that: The valve cover (2) is provided with a groove on the end surface facing the valve seat (1), and the contracted air bag (3) is arranged in the groove of the valve cover (2).

4. The airbag type fluid shut-off valve according to claim 1, characterized in that: Both ends of the valve seat (1) are provided with flanges.

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