CN111059318A

CN111059318A - Flexible cut-off equipment with seal structure

Info

Publication number: CN111059318A
Application number: CN201910950812.5A
Authority: CN
Inventors: 周超; 蔡可宁
Original assignee: Wuhan Shengyu Drainage Systems Co Ltd
Current assignee: Wuhan Shengyu Drainage Systems Co Ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-04-24

Abstract

The invention discloses a flexible cut-off device with a sealing structure, which comprises a rubber sleeve, a plurality of sealing bulges and a plurality of sealing grooves, wherein the rubber sleeve is provided with a through flow channel, the sealing bulges are respectively arranged on the inner wall of the deformation side of the rubber sleeve, and the sealing bulges are at least respectively positioned at the maximum deformation position of the side of the sealing bulges when the rubber sleeve is closed. The flexible cut-off device with the sealing structure is filled in the gap at the closed position of the rubber sleeve through the flexible deformable sealing element, the air pressure used for closing the rubber sleeve is small, zero leakage can be realized under low pressure (lower than 2bar), the sealing effect is good, the air pressure is low, the sealing structure is simple, and the traffic capacity of a flow passage is not influenced.

Description

Flexible cut-off equipment with seal structure

Technical Field

The invention relates to the technical field of drainage equipment, in particular to a flexible cut-off device with a sealing structure.

Background

Pneumatic cut-off equipment on market includes dustcoat and rubber sleeve, and the dustcoat forms the air cavity with rubber sleeve sealing connection, is equipped with the air inlet on the dustcoat, and rubber sleeve has certain elasticity, when filling into compressed gas in the air cavity, and gas pressure effect makes rubber sleeve inwards shrink tightly, realizes closing the action of damming channel, and when the air cavity released compressed gas, rubber sleeve recovered deformation, realized opening the action of damming channel. Referring to fig. 1 and 2, when the rubber sleeve is closed by three-way deformation or four-way deformation, the deformation of the rubber sleeve is more difficult as the rubber sleeve approaches to complete closing, the required air pressure is higher, and a gap exists in the inner wall of the rubber sleeve at the closed position.

Disclosure of Invention

The invention aims to overcome the defects of the background technology, and provides a flexible cut-off device with a sealing structure, which can realize zero-leakage sealing in a closed state under the action of low air pressure and has a good sealing effect.

The invention provides a flexible cut-off device with a sealing structure, which comprises a rubber sleeve, a plurality of sealing bulges and a plurality of sealing grooves, wherein the rubber sleeve is provided with a through flow channel, the sealing bulges are arranged on the inner wall of the deformation side of the rubber sleeve at intervals, and the sealing bulges are at least respectively positioned at the maximum deformation position of the rubber sleeve on the side of the sealing bulges when the rubber sleeve is closed.

On the basis of the technical scheme, the sealing bulge is made of rubber materials.

On the basis of the technical scheme, the hardness of the rubber material of the sealing bulge is lower than that of the rubber material of the rubber sleeve.

On the basis of the technical scheme, when the rubber sleeve is deformed and closed in three directions, the rubber sleeve is equally divided into three equal parts in the circumferential direction, and a sealing bulge is arranged at the closing position of each part of the rubber sleeve;

or when the rubber sleeve is deformed in four directions and closed, the rubber sleeve is equally divided into four equal parts in the circumferential direction, and a sealing bulge is arranged at the closed position of each part of the rubber sleeve.

On the basis of the technical scheme, the sealing bulge is adhered to the inner wall of the rubber sleeve;

or, the sealing bulge and the rubber sleeve are vulcanized into a whole.

On the basis of the technical scheme, the sealing bulges are arranged at equal intervals along the inner surface of the rubber sleeve.

On the basis of the technical scheme, the device further comprises a shell, the rubber sleeve is mounted in the shell, a cavity is formed between the shell and the rubber sleeve, and an inlet and outlet hole communicated with the cavity is formed in the shell.

On the basis of the technical scheme, the rubber sleeve is of a bag body structure with a cavity inside, and the bag body structure is provided with an inlet and outlet hole.

On the basis of the technical scheme, the sealing bulge is in a long strip shape, extends along the axial direction of the rubber sleeve and penetrates through the closing position of the rubber sleeve.

On the basis of the technical scheme, the cross section of the sealing bulge is semicircular.

Compared with the prior art, the invention has the following advantages:

(1) the flexible cut-off device with the sealing structure is provided with the sealing bulges, is filled in the gap at the closing position of the rubber sleeve, and the air pressure used for closing the rubber sleeve is small, so that zero leakage can be realized under low pressure (lower than 2bar), the sealing effect is good, the air pressure is low, the sealing structure is simple, and the traffic capacity of a flow channel is not influenced.

(2) The sealing bulge of the flexible cut-off device with the sealing structure is made of the rubber material with the hardness lower than that of the rubber sleeve, is easy to deform, can be better adapted to the shape of the gap at the closed position of the rubber sleeve, and has better sealing effect.

Drawings

Fig. 1 is a schematic view of a closing manner of a rubber sleeve in the prior art.

Fig. 2 is a schematic view of a closing manner of a rubber sleeve in the prior art.

Fig. 3 is a structural schematic diagram of the rubber sleeve deforming in four equal parts in the embodiment.

FIG. 4 is a schematic side view showing a quartered deformation of the rubber sleeve in the embodiment.

Fig. 5 is a schematic structural view of trisection deformation of the rubber sleeve in this embodiment.

Fig. 6 is a schematic side view of a trisection deformation of the rubber sleeve in this embodiment.

Fig. 7 is a schematic structural view of the tooling in the embodiment.

Fig. 8 is a schematic structural view of the tooling in the embodiment.

Reference numerals: 1-shell, 2-rubber sleeve, 3-flow channel, 4-sealing bulge and 5-tooling.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

Referring to fig. 3, 4, 5, and 6, the present embodiment 1 provides a flexible cut-off device with a sealing structure, which includes a rubber sleeve 2, the rubber sleeve 2 has a through flow channel 3, and further includes a plurality of sealing protrusions 4, the sealing protrusions 4 are disposed on an inner wall of a deformation side of the rubber sleeve 2 at intervals, and at least a portion of the sealing protrusions 4 is located at a maximum deformation position when the rubber sleeve 2 is closed. If the rubber sleeve 2 in this embodiment is divided into three deformation regions, when the rubber sleeve is deformed by pressurization and the rubber sleeve 2 in the three regions is deformed toward the central portion of the flow passage in a concentrated manner, the three deformation regions are respectively provided with a sealing protrusion 4, and the sealing protrusion 4 is at least partially disposed at the maximum deformation position where the rubber sleeve 2 is deformed inward. If the rubber sleeve 2 in this embodiment is divided into four deformation regions, when the rubber sleeve 2 deforms under pressure and the rubber sleeve 2 in the four regions deforms intensively towards the middle position of the flow channel 3, the four deformation regions are respectively provided with a sealing protrusion 4, and the sealing protrusion is specifically arranged at the maximum deformation position where the rubber sleeve 2 deforms inwards. Each area is provided with a sealing bulge 4, the deformation of the rubber sleeve 2 in other areas is not influenced, and in the closed position, all the sealing bulges 4 are tightly attached to fill gaps between the inner walls of the rubber sleeve 2.

Further, referring to fig. 3 and 4, when the rubber sleeve 2 adopts a four-way closing seal, the rubber sleeve 2 is divided into four zones equally, and when the closing position of the rubber sleeve 2 of each zone is located at a quadrant point position of the same circle, a sealing protrusion 4 is arranged at the closing position of each rubber sleeve 2, and at least partially covers the quadrant point position of the rubber sleeve. Or, referring to fig. 5 and 6, when the rubber sleeve 2 is deformed in three directions and closed, the rubber sleeve 2 is circumferentially divided into three equal parts, a sealing protrusion 4 is arranged at the closed position of each rubber sleeve 2, the closed positions of the rubber sleeves 2 are respectively located at the three equal parts of the same circle, three sealing protrusions 4 are arranged, and each sealing protrusion 4 at least partially covers the equal parts of the rubber sleeve. The closing positions are arranged at equal intervals, and the sealing bulges are arranged at intervals, so that the operation is convenient, and the deformation of the rubber sleeve 2 in each area is consistent.

The position and number of the sealing projections 4 in this embodiment are determined according to the position in the closed state of the rubber sleeve 2. Wherein the closed position of the rubber sleeve 2 is: the rubber sleeve 2 is deformed inward to the maximum deformation position, i.e., the highest convex deformation region of the rubber sleeve 2, after being subjected to the air pressure, the oil pressure or the water pressure, and the closed position of the rubber sleeve 2 can be determined by the following manner before the sealing protrusion is installed: before the rubber sleeve is pressurized, a tool 5 for controlling three-way or four-way deformation is placed in the rubber sleeve 2, the tool 5 is a support with a cross-shaped or Y-shaped section, the center point of the support is overlapped with the center point of the rubber sleeve 2, the support extends to the inner wall of the rubber sleeve 2 to be contacted with the inner wall of the rubber sleeve 2, the support extends along the length direction of the rubber sleeve 2, the rubber sleeve 2 is pressurized and deformed for multiple times under the action of the tool 5, the rubber is used as a shape memory material, after the tool is removed, equidistant directional deformation closing can be realized, the closing position of the rubber sleeve 2 is determined and marked, and the rubber sleeve 2 is vulcanized; in a second mode, the rubber sleeve can be pressurized for a plurality of times, and the closed position of the rubber sleeve 2 at the mark can be tested.

Preferably, the material of the sealing protrusion 4 in this embodiment is a rubber material, and the material of the sealing protrusion 4 may be the same as the hardness of the material of the rubber sleeve 2, or lower than the hardness of the material of the rubber sleeve 2, so that the sealing protrusion 4 is easy to deform, and does not affect the deformation of the rubber sleeve 2 at the position thereof, and the rubber sleeve 2 can realize zero-leakage sealing under a small inflation pressure.

Preferably, the sealing protrusion 4 in the embodiment can be integrally vulcanized with the rubber sleeve 2, and the closed position of the rubber sleeve is determined by the above manner, so that the sealing protrusion is integrally formed, the structural stability is good, and the operation is convenient; the sealing protrusion 4 may also be adhered to the fixed position of the rubber sleeve 2, and the closed position of the rubber sleeve 2 may be determined in the above manner, and the sealing protrusion 4 may extend out of the closed position of the rubber sleeve 2 when installed, or may completely coincide with the closed position of the rubber sleeve 2.

Preferably, the sealing protrusion 4 in this embodiment is in an elongated shape, extends along the axial direction of the rubber sleeve 2, and penetrates through the closed position of the rubber sleeve 2, and the cross-sectional shape of the sealing protrusion 4 is semicircular, the flat side of the sealing protrusion 4 is connected with the inner surface of the rubber sleeve 2, the sealing protrusion 4 spans the sealing position of the rubber sleeve 2 along the axial direction, the curved side of the sealing protrusion 4 is outward, and when the rubber sleeve 2 is closed, the curved sides of the sealing protrusions 4 are attached to each other to fill the gap generated when the rubber sleeve 2 is closed.

Preferably, the device also comprises a shell 1, the rubber sleeve 2 is arranged in the shell 1, a cavity is formed between the shell 1 and the rubber sleeve 2, and the shell 1 is provided with an inlet and outlet hole communicated with the cavity. It will be understood by those skilled in the art that the connection between the housing 1 and the rubber sleeve 2 may be sealed by a flange, but the connection is not the only connection as long as the housing 1 and the rubber sleeve 2 form the cavity 10.

Preferably, rubber sleeve 2 in this embodiment adopts the utricule structure, and under the user state, utricule structure direct mount is formed with the cavity in the pipeline in the utricule structure, is equipped with the business turn over hole in the utricule structure, and the utricule structure is pressurized through the business turn over hole and is closed or the pressure is released and open, and the outer wall of utricule structure closely laminates with the inner wall of pipeline, and sealed protruding 4 setting is inboard at the utricule structure. Adopt utricule structure easy to assemble and dismantle.

Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and they are also within the scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims

1. The utility model provides a flexible cut-off equipment with seal structure, includes rubber sleeve (2), rubber sleeve (2) have circulation passageway (3) that run through, its characterized in that still includes a plurality of sealed archs (4), sealed protruding (4) interval set up in on the inner wall of rubber sleeve (2) deformation side, sealed protruding (4) are located its place side respectively at least the biggest deformation position when rubber sleeve (2) are closed.

2. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: the sealing bulge (4) is made of rubber materials.

3. A flexible flow stop device with sealing structure as claimed in claim 2, wherein: the hardness of the rubber material of the sealing bulge (4) is lower than that of the rubber material of the rubber sleeve (2).

4. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: when the rubber sleeve (2) is deformed and closed in three directions, the rubber sleeve (2) is equally divided into three equal parts in the circumferential direction, and a sealing bulge (4) is arranged at the closing position of each part of the rubber sleeve (2);

or when the rubber sleeve (2) is deformed in four directions and closed, the rubber sleeve (2) is equally divided into four equal parts in the circumferential direction, and a sealing bulge (4) is arranged at the closed position of each part of the rubber sleeve (2).

5. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: the sealing bulge (4) is adhered to the inner wall of the rubber sleeve (2); or the sealing bulge (4) and the rubber sleeve (2) are vulcanized into a whole.

6. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: the sealing bulges (4) are arranged at equal intervals along the inner surface of the rubber sleeve.

7. A flexible cut-off device with a sealing structure (4) according to claim 1, characterized in that: the device also comprises a shell (1), the rubber sleeve (2) is arranged in the shell (1), a cavity is formed between the shell (1) and the rubber sleeve (2), and an inlet and outlet hole communicated with the cavity is formed in the shell (1).

8. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: the rubber sleeve (2) is of a bag body structure with a cavity inside, and the bag body structure is provided with an inlet and outlet hole.

9. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: the sealing bulge (4) is long and extends along the axis direction of the rubber sleeve and penetrates through the closing position of the rubber sleeve (2).

10. A flexible flow stop device with sealing structure as claimed in claim 1, wherein: the cross section of the sealing bulge (4) is semicircular.