CN210118476U - A kind of rubber sleeve for pneumatic shut-off device and pneumatic shut-off device - Google Patents

Abstract

This utility model discloses a rubber sleeve for a pneumatic shut-off device. The rubber sleeve has a flow channel extending through both ends, and a groove is provided circumferentially along its surface. The wall thickness of the rubber sleeve at the groove location is less than the wall thickness at other locations. This utility model has the advantages of good sealing effect, low required gas pressure, and fast closing speed.

Description

A kind of rubber sleeve for pneumatic shut-off device and pneumatic shut-off device

technical field

The utility model relates to the technical field of drainage, in particular to a rubber sleeve for a pneumatic interception device and a pneumatic interception device.

Background technique

The pneumatic shut-off device on the market includes an outer cover and a rubber sleeve. The outer cover and the rubber sleeve are sealed and connected to form an air cavity. The outer cover is provided with an air inlet. The rubber sleeve has a certain elasticity. When the air cavity is filled with compressed gas, The action of gas pressure makes the rubber sleeve compress inward to realize the action of closing the interception channel. When the air cavity releases the pressurized gas, the rubber sleeve recovers its deformation and realizes the action of opening the interception channel. However, the structure of the rubber sleeve in the prior art is relatively simple, and in order to realize that the sleeve is closed and sealed without water leakage, the air pressure used is relatively high. Taking a pneumatic shut-off device with a pipe diameter of 600mm as an example, it needs to be filled with a gas pressure of more than 4 bar, and it may not be able to achieve zero leakage sealing. The gas pressure is too high, there is a danger of explosion during installation and use, the use environment is limited, and If the inflation time is too long, the input cost is high.

Utility model content

The purpose of this utility model is to overcome the above-mentioned deficiencies of the background technology, and provide a rubber sleeve for a pneumatic shut-off device and a pneumatic shut-off device, which can realize zero leakage under the action of lower gas pressure and have a good sealing effect.

The utility model provides a rubber sleeve for a pneumatic shut-off device. The inside of the rubber sleeve is provided with a circulation channel running through both ends of the rubber sleeve, and a groove is provided along the surface of the rubber sleeve in the circumferential direction. The wall thickness of the rubber sleeve is smaller than the wall thickness of the rubber sleeve at other locations.

On the basis of the above technical solution, the groove is arranged on the inner surface of the rubber sleeve;

Or, the groove is arranged on the outer surface of the rubber sleeve.

On the basis of the above technical solution, the other surface of the rubber sleeve at the corresponding position of the groove is flush.

On the basis of the above technical solution, the wall thickness of the rubber sleeve at the position corresponding to the groove is 1/2 to 3/4 of the wall thickness of the rubber sleeve at other positions.

On the basis of the above technical solution, the length of the groove is in the range of 20 to -200 mm.

On the basis of the above technical solution, the length of the groove is proportional to the diameter of the rubber sleeve.

On the basis of the above technical solution, along the axial direction of the rubber sleeve, the groove is arranged in the middle of the rubber sleeve.

On the basis of the above technical solutions, flange connection parts protruding outward are provided at both ends of the rubber sleeve.

On the basis of the above technical solution, a pneumatic shut-off device includes:

The rubber sleeve as claimed in claim 8;

an outer cover, the outer cover is provided with an air inlet hole and an air outlet hole, and the flange connection part of the outer cover and the rubber sleeve is sealedly connected by a flange plate;

An air cavity is formed between the inner wall of the outer cover and the outer wall of the rubber sleeve, and the air inlet hole and the air outlet hole communicate with the air cavity.

Compared with the prior art, the advantages of the present utility model are as follows:

(1) The surface of the rubber sleeve for the pneumatic shut-off device of the present invention is provided with a groove, which weakens the wall thickness of the rubber sleeve at the groove position, so that the wall thickness of the rubber sleeve at the corresponding position of the groove is smaller than other positions When the pneumatic shut-off device is filled with pressurized gas, the rubber sleeve at the corresponding position of the groove is preferentially deformed inward and the deformation is the largest. The groove walls on both sides of the groove are the first to contact and cut off the circulation passage. When the groove is set on the outer wall of the sleeve, the position of the groove is deformed so that the inner side of the groove wall sleeve at the bottom of the groove is the first to contact and cut off the circulation passage. The wall thickness at the sealing position is weakened, and the pipeline sealing in the closed state is realized, the sealing effect is good, the required gas pressure is small, and the closing speed is fast.

(2) The groove of the rubber sleeve for the pneumatic shut-off device of the present invention is arranged at the middle position of the rubber sleeve along the axis direction to ensure that the rubber sleeves on both sides of the groove are uniformly stressed, deformed uniformly, and have a sealing effect. better.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a partial enlarged view of A in FIG. 1 .

FIG. 3 is a schematic structural diagram of Embodiment 2 of the present utility model

FIG. 4 is a partial enlarged view of B in FIG. 1 .

Reference numerals: 1-rubber sleeve 1, 2-flow channel 2, 3-groove, 4-cover, 5-air inlet hole, 6-air outlet hole.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

Referring to FIG. 1 and FIG. 2 , the present invention provides a rubber sleeve 1 for a pneumatic shut-off device. The rubber sleeve 1 is internally provided with a circulation channel 2 penetrating both ends of the rubber sleeve 1 , along the surface of the rubber sleeve 1 . A groove 3 is provided in the circumferential direction, and the wall thickness of the rubber sleeve 1 at the position of the groove 3 is smaller than the wall thickness of the rubber sleeve 1 at other positions. In this embodiment, the groove 3 is arranged on the inner surface of the rubber sleeve 1, and the outer surface of the rubber sleeve 1 is flush. Ensure that the rubber sleeves 1 on both sides of the groove 3 are uniformly deformed by force. The thickness of the rubber sleeve 1 at the corresponding position of the groove 3 is 1/2 to 3/4 of the thickness of the rubber sleeve 1 at other positions. According to the pneumatic interception device of different specifications, the length range of the groove 3 is 20mm -200mm, correspondingly, the length of the groove 3 is proportional to the pipe diameter of the rubber sleeve 1, the larger the pipe diameter of the rubber sleeve 1, the greater the length of the groove 3.

Example 2

Referring to FIG. 3 and FIG. 4 , the present invention provides a rubber sleeve 1 for a pneumatic shut-off device. The rubber sleeve 1 is internally provided with a circulation channel 2 penetrating both ends of the rubber sleeve 1 , along the surface of the rubber sleeve 1 . A groove 3 is provided in the circumferential direction, and the wall thickness of the rubber sleeve 1 at the position of the groove 3 is smaller than the wall thickness of the rubber sleeve 1 at other positions. In this embodiment, the groove 3 is arranged on the outer surface of the rubber sleeve 1, and the inner surface of the rubber sleeve 1 is flush. Ensure that the rubber sleeves 1 on both sides of the groove 3 are uniformly deformed by force. The thickness of the rubber sleeve 1 at the corresponding position of the groove 3 is 1/2 to 3/4 of the thickness of the rubber sleeve 1 at other positions. According to the pneumatic interception device of different specifications, the length range of the groove 3 is 20mm -200mm, correspondingly, the length of the groove 3 is proportional to the pipe diameter of the rubber sleeve 1, the larger the pipe diameter of the rubber sleeve 1, the greater the length of the groove 3. In this embodiment, the wall thickness at the sealing position is weakened from the outside, the inner surface of the rubber sleeve 1 is smooth and level, the required pressure is small, and the sealing effect is good.

Example 3

Referring to FIGS. 1 to 4 , the present invention provides a pneumatic shut-off device, which includes any one of the rubber sleeves 1 and the outer cover 44 in the above-mentioned Embodiments 1 to 3. Both ends of the rubber sleeve 1 are provided with There are those that protrude outward, and the outer cover 4 is provided with an air inlet 5 and an air outlet 6, and the flange connection part of the outer cover 4 and the rubber sleeve 1 is connected by a flange seal; the inner wall of the outer cover 4 and the rubber sleeve 1 An air cavity is formed between the outer walls, and the air inlet hole 55 and the air outlet hole 66 communicate with the air cavity. In this embodiment, the pneumatic cut-off device is connected to the air source. When the pneumatic cut-off device is inflated, the groove 3 of the rubber sleeve 1 is deformed first, and the circulation channel 2 is closed. When the pneumatic cut-off device is deflated, the rubber sleeve 1 The groove 3 quickly recovers and deforms, and the flow channel 2 is turned on. In the cut-off state, only a small pressure is needed to achieve zero leakage sealing, the sealing effect is good, and the closing and opening are faster.

Compare the pneumatic interception device of the present embodiment with the pneumatic interception device in the prior art, wherein, the pneumatic interception device is suitable for a pipe diameter of 600 mm, and the use environment is 1 m head, and the comparison is as follows:

Pressure value sealing effect current technology Above 4bar drip leak Example 3 Below 2.5bra Zero leakage

It can be seen that the required pressure value of the pneumatic shut-off device in the present embodiment is smaller, and the sealing effect is better, and the use of pressure vessels is subject to the constraints of "National Standard of the People's Republic of China: Pressure Vessels (GB 150.1-150.4-2011)", The air pressure value required in this embodiment is small, which can meet the requirements of the standard, has a wide application range, high safety, and a good market prospect. Using the rubber sleeve in this embodiment, the smaller the compressed air pressure in the air cavity, the lower the material cost of the equipment cover; the lower the pressure on the rubber sleeve when it is closed, the longer its service life will be. Longer; it will be safer when the equipment is installed, debugged and used.

Those skilled in the art can make various modifications and variations to the embodiments of the present invention. If these modifications and variations are within the scope of the claims of the present invention and its equivalent technology, these modifications and variations are also protected by the present invention. within the range.

The content not described in detail in the specification is the prior art known to those skilled in the art.

Claims (9)

1. The utility model provides a pneumatic rubber sleeve for cut-off equipment which characterized in that: the rubber sleeve is internally provided with a circulation channel penetrating through two ends of the rubber sleeve, a groove is circumferentially arranged on the surface of the rubber sleeve, and the wall thickness of the rubber sleeve at the groove position is smaller than that of the rubber sleeves at other positions.

2. A rubber sleeve for a pneumatic stopping device according to claim 1, wherein: the groove is arranged on the inner surface of the rubber sleeve;

or, the groove is arranged on the outer surface of the rubber sleeve.

3. A rubber sleeve for a pneumatic stopping device according to claim 1, wherein: the other surface of the rubber sleeve at the position corresponding to the groove is flush.

4. A rubber sleeve for a pneumatic stopping device according to claim 1, wherein: the wall thickness of the rubber sleeve at the position corresponding to the groove is 1/2-3/4 of the wall thickness of the rubber sleeve at other positions.

5. A rubber sleeve for a pneumatic stopping device according to claim 1, wherein: the length range value of the groove is 20 to-200 mm.

6. A rubber sleeve for a pneumatic stopping device according to claim 1, wherein: the length of the groove is in direct proportion to the pipe diameter of the rubber sleeve.

7. A rubber sleeve for a pneumatic stopping device according to claim 1, wherein: along the axis direction of the rubber sleeve, the groove is formed in the middle of the rubber sleeve.

8. A rubber sleeve for a pneumatic stopping device according to any one of claims 1 to 7, wherein: and the two end parts of the rubber sleeve are provided with flange connecting parts protruding outwards.

9. A pneumatic shut-off device, comprising:

the rubber sleeve of claim 8;

the outer cover is provided with an air inlet hole and an air outlet hole, and the outer cover is hermetically connected with the flange connecting part of the rubber sleeve through a flange plate;

an air cavity is formed between the inner wall of the outer cover and the outer wall of the rubber sleeve, and the air inlet and the air outlet are communicated with the air cavity.

Images