CN111075948B - A flexible intercepting device and a pipeline for installing the device - Google Patents
A flexible intercepting device and a pipeline for installing the device Download PDFInfo
- Publication number
- CN111075948B CN111075948B CN201911311344.3A CN201911311344A CN111075948B CN 111075948 B CN111075948 B CN 111075948B CN 201911311344 A CN201911311344 A CN 201911311344A CN 111075948 B CN111075948 B CN 111075948B
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- Prior art keywords
- rubber sleeve
- sleeve
- limiting portion
- rubber
- chamber
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
- F16K7/04—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force
- F16K7/07—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force by means of fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0236—Diaphragm cut-off apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a flexible cut-off device and a pipeline for installing the same, the flexible cut-off device comprises a rubber sleeve, an outer sleeve and a third limit part, wherein the rubber sleeve is provided with a through circulation channel, the rubber sleeve is of an integrated structure, at least one independent pressurizing cavity is arranged in the rubber sleeve, the rubber sleeve is of an integrated structure, an inlet and outlet hole is arranged on an outer rubber layer of each pressurizing cavity, the inlet and outlet hole is communicated with the pressurizing cavity, the outer sleeve is sleeved outside the rubber sleeve, two ends of the outer sleeve are respectively provided with a limit part, namely a first limit part and a second limit part, the first limit part is arranged at the port of the outer sleeve to extend outwards, the second limit part is arranged at the port of the other end of the outer sleeve to extend inwards, the third limit part is arranged at the inner side of the end of the outer sleeve close to the side of the first limit part, and the rubber sleeve is clamped between the second limit part and the third limit part. The limiting part is removed at one end of the invention, so that the invention is convenient to install and maintain.
Description
Technical Field
The invention relates to the technical field of drainage equipment, in particular to a flexible cut-off device and a pipeline for installing the device.
Background
The flexible cut-off device is a cut-off facility applied to a water outlet or a discharge port of a diversion well, and the structure of the flexible cut-off device generally comprises an outer shell and a rubber sleeve, a pressurizing cavity is formed between the outer shell and the rubber sleeve, the end part of the rubber sleeve is in sealing connection with the end part of the outer shell through a flange, when pressurized gas is filled into the pressurizing cavity, the rubber sleeve deforms inwards relatively, the inner wall of the rubber sleeve is attached, and a circulation channel is cut off. However, when the pipe diameter of the drainage pipe or the drainage port butted by the diversion well is large (if the pipe diameter is more than DN 400), the pipe diameter of the rubber sleeve cannot be large in deformation, and at the moment, the end part of the rubber sleeve and the end part of the outer shell deform greatly, the end part of the rubber sleeve slides out between the flange plate and the end part of the outer shell, and the pressurizing cavity is not sealed well. And among the prior art flexible cut-off device shell body and the matching nature of pipeline are not good, often be the end connection with the tip of shell body and pipeline, need occupy the pipeline tip and set up the mounting well, and the required mounting well is also bigger when flexible cut-off device specification is great, and the foundation construction engineering volume is big, and the efficiency of construction is low with high costs, and later maintenance is inconvenient, consequently, need to wait one kind to solve the flexible cut-off device of sealed problem easy to assemble.
Disclosure of Invention
The invention aims to overcome the defects of the background technology, and provides the flexible cut-off device and the pipeline for installing the device, which have the advantages of good sealing effect, simple structure and convenient installation and maintenance.
The invention discloses a flexible cut-off device, comprising:
the rubber sleeve is provided with a through circulation channel, the rubber sleeve is of an integrated structure, at least one independent pressurizing cavity is arranged in the rubber sleeve, the rubber sleeve is of an integrated structure, and the rubber sleeve at the position of each pressurizing cavity is provided with an outer rubber layer and an inner rubber layer;
The outer sleeve is sleeved outside the rubber sleeve, two ends of the outer sleeve are respectively provided with a limiting part, namely a first limiting part and a second limiting part, the first limiting part is arranged at the port of the outer sleeve and extends outwards, and the second limiting part is arranged at the port at the other end of the outer sleeve and extends inwards;
And the third limiting part is arranged on the inner side of the end part of the outer sleeve close to the side where the first limiting part is positioned, and the rubber sleeve is clamped between the second limiting part and the third limiting part.
Optionally, the pressurizing cavity is a lower pressurizing cavity, the lower pressurizing cavity is arranged at the lower half part of the rubber sleeve, and the outer rubber layer at the side where the lower pressurizing cavity is arranged is provided with a lower inlet and outlet hole.
Optionally, two independent pressurizing cavities are arranged, namely an upper pressurizing cavity and a lower pressurizing cavity, the upper pressurizing cavity and the lower pressurizing cavity are respectively arranged on the upper side and the lower side of the rubber sleeve, an outer rubber layer on the side where the upper pressurizing cavity is arranged and an upper inlet and outlet hole communicated with the upper pressurizing cavity, and an outer rubber layer on the side where the lower pressurizing cavity is arranged and a lower inlet and outlet hole communicated with the lower pressurizing cavity.
Optionally, three independent pressurizing cavities are arranged, the pressurizing cavities are divided into three parts along the circumferential direction of the rubber sleeve, and each part of the rubber sleeve is provided with one pressurizing cavity;
or, four independent pressurizing cavities are arranged, the pressurizing cavities are divided into four parts along the circumferential direction of the rubber sleeve, and each part of the rubber sleeve is provided with one pressurizing cavity.
Optionally, the outer tube has the pipe shaft that the level set up, and the both ends of pipe shaft are provided with the boss that the protrusion direction is opposite, and wherein, outside convex boss is first spacing portion, and inside convex boss is second spacing portion, first spacing portion is equipped with the mounting hole.
Optionally, the third spacing portion includes the piece of bending, the piece of bending has horizontal portion and vertical portion, horizontal portion is equipped with the mounting hole, horizontal portion with the outer tube links to each other, vertical portion with the rubber sleeve is held in the support of second spacing portion.
Optionally, the third limiting part comprises a plurality of bending pieces, and the bending pieces are arranged at intervals along the end part of the rubber sleeve;
Or, the bending piece of the third limiting part is of an integrated structure, and the shape of the vertical part of the bending piece is matched with the end part of the rubber sleeve.
In yet another aspect, the present invention further provides a pipe having a flexible stop as described above mounted within a port thereof;
The outer wall of the outer sleeve is attached to the inner wall of the port close to the pipeline, the first limiting part of the outer sleeve is fixed around the port of the pipeline, the second limiting part extends into the pipeline, and the second limiting part and the third limiting part are used for jointly fixing the rubber sleeve.
Compared with the prior art, the invention has the following advantages:
(1) The flexible cut-off device can only adopt a rubber sleeve structure, the pressurizing cavity is arranged in the rubber sleeve, the whole rubber sleeve is of an integrated structure, compared with the prior art, the flexible cut-off device has the advantages that the sealing problem of the pressurizing cavity is avoided, the structure is simpler, the installation and the use are convenient, the rubber sleeve is clamped and fixed through the limiting parts arranged at the two ends of the rubber sleeve, and the rubber sleeve can be integrally pulled out only by detaching the third limiting part from one end when the rubber sleeve is installed and maintained at a later stage, so that the installation and the maintenance are convenient.
(2) The rubber sleeve of the flexible shutoff device is internally provided with the independent pressurizing cavity or the two independent pressurizing cavities, the rubber sleeve has the shutoff function besides the traditional function of closing the circulation channel, only the lower pressurizing cavity can be pressurized, the inner layer rubber layer of the lower pressurizing cavity is raised upwards, the lower half part of the rubber sleeve after being inflated and deformed is equivalent to an adjusting weir capable of adjusting the height, and when the water level rises above the shutoff height, water can overflow from the upper surface. Thus, the accumulated mud at the bottom of the pipeline or the accumulated mud in the diversion well can be intercepted, and the accumulated mud at the bottom is prevented from entering the natural water body along with rainwater, so that the natural water body is prevented from being polluted. In addition, the water outlet is used at the water outlet, the intercepting height of the lower half part of the rubber sleeve can be adjusted according to the natural water level, the backflow of natural water is prevented, and the overflow from the top of the lower half part of the rubber sleeve does not influence flood discharge while the backflow is prevented.
(3) According to the flexible shutoff device, the rubber sleeve is designed to be deformed in three directions or four directions to close the shutoff channel, the sealing element is filled in the gap at the closing position of the rubber sleeve, the air pressure used for closing the rubber sleeve is small, zero leakage can be realized under low pressure (lower than 2 bar), the sealing effect is good, the air pressure is low, the sealing structure is simple, and the traffic capacity of the circulation channel is not influenced.
(4) According to the pipeline for installing the flexible cut-off device, the first limiting part is installed and fixed at the end part of the pipeline during installation, and the installation and the disassembly of the whole device can be completed only by detaching the first limiting part from the end part of the pipeline during installation or disassembly, and when the rubber sleeve is required to be maintained, the whole rubber sleeve can be pulled out for maintenance or replacement by detaching the third limiting part, so that the pipeline is simple and easy to operate.
Drawings
Fig. 1 is a schematic view of the embodiment 1 in an installed state.
Fig. 2 is a cross-sectional view A-A of fig. 1.
Fig. 3 is a partial enlarged view at a in fig. 1.
Fig. 4 is a schematic view showing the state of opening of the flow passage in the form of a rubber sleeve.
Fig. 5 is a schematic view of a rubber sleeve type flow passage in a shut-off state.
Fig. 6 is a schematic view showing the state of the three-flow passage in the form of a rubber sleeve being opened.
Fig. 7 is a schematic view of a state in which a flow passage in the form of a rubber sleeve is shut off.
Fig. 8 is a schematic view of a rubber sleeve with three independent plenum chambers disposed therein.
Fig. 9 is a schematic view of a rubber sleeve form three provided with four independent pressurizing chambers.
The device comprises a 1-rubber sleeve, a 10-flow channel, a 11-pressurizing cavity, a 110-upper pressurizing cavity, a 111-lower pressurizing cavity, a 12-outer rubber layer, a 13-inner rubber layer, a 2-outer sleeve, a 20-first limiting part, a 21-second limiting part, a 22-third limiting part, a 220-horizontal part, a 221-vertical part and a 3-port.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and specific examples.
Example 1
Referring to fig. 1 to 8, the invention provides a flexible stop device, which comprises a rubber sleeve 1, an outer sleeve 2 and a third limiting part 22, wherein the rubber sleeve 1 is provided with a through circulation channel 10, the rubber sleeve 1 is of an integrated structure, at least one independent pressurizing cavity 11 is arranged in the rubber sleeve 1, the rubber sleeve 1 is of an integrated structure, the rubber sleeve 1 provided with at least one independent pressurizing cavity 11 at the position of each pressurizing cavity 11 is provided with an outer layer rubber layer 12 and an inner layer rubber layer 13, the outer layer rubber layer 12 of each pressurizing cavity 11 is provided with an inlet and outlet hole, the inlet and outlet hole is communicated with the pressurizing cavity 11, the outer sleeve 2 is sleeved outside the rubber sleeve 1, two ends of the outer sleeve 2 are respectively provided with a limiting part, namely a first limiting part 20 and a second limiting part 21, the first limiting part 20 is arranged at the port of the outer sleeve 2, the second limiting part 21 is arranged at the port of the other end of the outer sleeve 2 and extends inwards, and the third limiting part 23 is arranged at the inner side of the end of the outer sleeve 2 near the side of the first limiting part 20, and the rubber sleeve 1 is clamped between the second limiting part 21 and the third limiting part 22. The rubber structure forming the pressurizing cavity 11 in this embodiment is an integral structure with the rubber structure at other positions, because the rubber sleeve 1 does not form the pressurizing cavity 11 together with other components, a sealing structure is not required to be arranged for sealing the pressurizing cavity 11 so as to prevent the pressurizing cavity 11 from leaking, and the pressurizing structure is simple in structure, convenient to install and wide in application range. The rubber sleeve 1 is fixed at two ends only, and the mounting structure is not arranged on the pipe body of the rubber sleeve 1, so that the rubber sleeve is convenient to detach and easy to operate in mounting and maintenance.
Preferably, as a specific embodiment, the structure of the rubber sleeve 1 has the following forms:
Referring to fig. 2, in the first structural form of the rubber sleeve 1, in this embodiment, the rubber sleeve 1 is cylindrical, the pressurizing cavity 11 in the rubber sleeve 1 is also cylindrical, the rubber sleeve 1 is provided with an access hole, the pressurizing cavity 11 is pressurized through the access hole, the rubber sleeve 1 is deformed, the circulation channel 10 is blocked, the pressurizing cavity 11 is pressurized through the access hole, the rubber sleeve 1 is deformed in a recovery manner, and the circulation channel 10 is conducted;
Referring to fig. 4 and 5, the second structural form of the rubber sleeve 1 is shown, wherein the cross-section of the rubber sleeve 1 is circular, when a pressurizing cavity 11 is provided, the pressurizing cavity 11 is a lower pressurizing cavity 111, the cross-section of the lower pressurizing cavity 111 is arc-shaped, the arc length of the cross-section of the lower pressurizing cavity 111 is smaller than the perimeter of the rubber sleeve 1 with the cross-section, the rubber sleeve 1 at the position of the lower pressurizing cavity 111 is provided with an outer layer rubber layer 12 and an inner layer rubber layer 13, the outer layer rubber layer 12, the inner layer rubber layer 13 and the rubber sleeve 1 except the pressurizing cavity 11 are in an integral structure, wherein the arc length of the lower pressurizing cavity 111 can occupy one half of the perimeter of the whole rubber sleeve 1 or two thirds, different specifications can be designed according to different intercepting heights, and the higher intercepting height is the arc length of the lower pressurizing cavity 11 is more similar to the perimeter of the rubber sleeve. The outer rubber layer 12 of the lower pressurizing cavity 111 is provided with an inlet and outlet hole, the inlet and outlet hole is communicated with the pressurizing cavity 11, the inner rubber layer 13 at the side of the lower pressurizing cavity 111 is pressurized through the inlet and outlet hole, the height of the inner rubber layer 13 is raised upwards to be equal to a weir capable of adjusting the height, when the inner rubber layer 13 is attached to the inner wall of the rubber sleeve 1 at the upper half part, the circulation channel 10 is blocked, when the inner rubber layer 13 of the lower half part of the lower pressurizing cavity 111 in the structure is raised to be a certain height, the top space of the inner rubber layer 13 can overflow, a part of silt garbage can be prevented from entering the downstream, and the overflow of the water level at the downstream can be prevented;
As shown in fig. 6 and 7, two independent pressurizing chambers 11 are provided, namely an upper pressurizing chamber 110 and a lower pressurizing chamber 111, the upper pressurizing chamber 110 and the lower pressurizing chamber 111 are respectively arranged on the upper side and the lower side of the rubber sleeve 1, an outer rubber layer 12 on the side where the upper pressurizing chamber 110 is arranged is provided with an upper inlet and outlet hole communicated with the upper pressurizing chamber 110, and an outer rubber layer 12 on the side where the lower pressurizing chamber 111 is arranged is provided with a lower inlet and outlet hole communicated with the lower pressurizing chamber 111.
The rubber sleeve 1 is provided with three independent pressurizing cavities 11, three parts are divided along the circumferential direction of the rubber sleeve 1, and each part of the rubber sleeve 1 is provided with one pressurizing cavity 11, or four independent pressurizing cavities 11 are provided, four parts are divided along the circumferential direction of the rubber sleeve 1, each part of the rubber sleeve 1 is provided with one pressurizing cavity 11, and each pressurizing cavity 11 is provided with an inlet and outlet hole, as shown in fig. 9. Preferably, the rubber sleeve 1 should be divided into three or four parts in equal parts, so that the deformation of the inner rubber layer of each part of the rubber sleeve 1 is the same, the pressurizing is the same, and the control is convenient. The rubber sleeve 1 with larger relative size is relatively deformed to enable the circulation channel 10 to be cut off if the upper half body structure or the two half body structures are adopted, if the pipe diameter of the circulation channel 10 is larger, the deformation of the rubber sleeve 1 at the upper side and the lower side is larger, the required pressure is larger, the sealing effect is not good, zero leakage cannot be realized by the circulation channel 10, and potential safety hazards of explosion exist.
Further preferably, the inlet and outlet holes in this embodiment may be two holes of inlet and outlet holes provided in the outer rubber layer 12, or may be a hole provided in the outer rubber layer 12, and inlet and outlet pipes may be provided on a conveying pipe connected to the hole.
Further preferably, in this embodiment, the outer sleeve 2 has a pipe body that is horizontally disposed, two ends of the pipe body are provided with bosses with opposite protruding directions, wherein the boss that protrudes outwards is a first limiting portion 20, the boss that protrudes inwards is a second limiting portion 21, the first limiting portion 20 is provided with a mounting hole, the first limiting portion 20 is fixed on a concrete structure around a pipe port by using an expansion bolt, and the pipe body is directly inserted into the pipe and passes through a third limiting portion 22.
Further preferably, referring to fig. 3, the third limiting portion 22 in this embodiment includes a bending member, where the bending member has a horizontal portion 220 and a vertical portion 221, the horizontal portion 220 is provided with a mounting hole, the horizontal portion 220 is connected to the outer sleeve 2 by an expansion bolt, and the vertical portion 221 abuts against the second limiting portion 21. Preferably, the third limiting part comprises a plurality of bending pieces which are arranged at intervals along the end part of the rubber sleeve 1, or the bending pieces of the third limiting part 22 are of an integrated structure, and the vertical parts 221 of the bending pieces are matched with the end part of the rubber sleeve 1 in shape. In the embodiment, the rubber sleeve 1 does not damage the whole result of the rubber sleeve 1, the rubber sleeve 1 is fixed at two ends, and the fixing structure is simple and convenient to install and detach.
Example 2
On the basis of the embodiment 1, referring to fig. 1, a pipeline is provided, and the flexible shutoff device of the embodiment 1 is arranged in a port 3 of the pipeline;
The outer wall of the outer sleeve 2 is attached to the inner wall of the port 3 of the pipeline, the outer wall of the outer sleeve 2 is attached to the inner wall of the port 3 close to the pipeline, the first limiting part 20 of the outer sleeve 2 is fixed around the port 3 of the pipeline, the second limiting part 21 extends into the pipeline, and the second limiting part 21 and the third limiting part 22 are used for jointly fixing the rubber sleeve 1. The third limit part 22 and the end part of the outer sleeve 2 are arranged at the position of the pipeline 3 close to the end part. When the installation, install and fix the tip at the pipeline with first spacing portion, when installing or dismantling, only need demolish first spacing portion from the tip of pipeline, can accomplish the installation and the dismantlement of whole device, when need maintain the rubber sleeve, demolish third spacing portion 22, can be with whole the taking out maintenance or the change of rubber sleeve 1, simple easy operation. The flexible cut-off device of the embodiment does not occupy the space in front of or behind the pipeline, saves space when installed in the pipeline, and is convenient to install and maintain in the later period.
Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and are within the scope of the appended claims and their equivalents.
What is not described in detail in the specification is prior art known to those skilled in the art.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311344.3A CN111075948B (en) | 2019-12-18 | 2019-12-18 | A flexible intercepting device and a pipeline for installing the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311344.3A CN111075948B (en) | 2019-12-18 | 2019-12-18 | A flexible intercepting device and a pipeline for installing the device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111075948A CN111075948A (en) | 2020-04-28 |
| CN111075948B true CN111075948B (en) | 2025-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911311344.3A Active CN111075948B (en) | 2019-12-18 | 2019-12-18 | A flexible intercepting device and a pipeline for installing the device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111075948B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043348A (en) * | 2019-12-18 | 2020-04-21 | 武汉圣禹排水系统有限公司 | Rubber sleeve with mounting structure and pipe for installing the sleeve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3103300A (en) * | 1960-12-30 | 1963-09-10 | Black Products Co | Sleeve valve |
| CN107191619A (en) * | 2017-06-15 | 2017-09-22 | 丁庆鹏 | A kind of end hose on-off control system |
| CN109339194A (en) * | 2018-10-30 | 2019-02-15 | 武汉圣禹排水系统有限公司 | Shut-off device with bladder, diverter well and control system thereof |
| CN212455595U (en) * | 2019-12-18 | 2021-02-02 | 武汉圣禹排水系统有限公司 | Flexible cut-off device and pipeline provided with same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1564457A1 (en) * | 2004-02-12 | 2005-08-17 | Red Valve Company, Inc. | Flexible half sleeve style pinch valve |
| CN110397152A (en) * | 2019-06-19 | 2019-11-01 | 武汉圣禹排水系统有限公司 | A kind of adjustable flexible cut-off equipment |
-
2019
- 2019-12-18 CN CN201911311344.3A patent/CN111075948B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3103300A (en) * | 1960-12-30 | 1963-09-10 | Black Products Co | Sleeve valve |
| CN107191619A (en) * | 2017-06-15 | 2017-09-22 | 丁庆鹏 | A kind of end hose on-off control system |
| CN109339194A (en) * | 2018-10-30 | 2019-02-15 | 武汉圣禹排水系统有限公司 | Shut-off device with bladder, diverter well and control system thereof |
| CN212455595U (en) * | 2019-12-18 | 2021-02-02 | 武汉圣禹排水系统有限公司 | Flexible cut-off device and pipeline provided with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111075948A (en) | 2020-04-28 |
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