CN114352838A - Flexible cut-off equipment and drainage equipment - Google Patents

Flexible cut-off equipment and drainage equipment Download PDF

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Publication number
CN114352838A
CN114352838A CN202010873880.9A CN202010873880A CN114352838A CN 114352838 A CN114352838 A CN 114352838A CN 202010873880 A CN202010873880 A CN 202010873880A CN 114352838 A CN114352838 A CN 114352838A
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CN
China
Prior art keywords
flexible
valve
flexible sleeve
pipeline
cover body
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Pending
Application number
CN202010873880.9A
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Chinese (zh)
Inventor
周超
李习洪
王晓梁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Shengyu Drainage Systems Co Ltd
Original Assignee
Wuhan Shengyu Drainage Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Shengyu Drainage Systems Co Ltd filed Critical Wuhan Shengyu Drainage Systems Co Ltd
Priority to CN202010873880.9A priority Critical patent/CN114352838A/en
Publication of CN114352838A publication Critical patent/CN114352838A/en
Pending legal-status Critical Current

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Abstract

The application provides a flexible cut-off device which comprises a cover body, wherein a hollow structure is arranged in the cover body; the flexible sleeve is provided with a cavity, is arranged in the hollow structure and can expand or contract in the hollow structure; wherein, it crosses the water hole to have seted up a plurality of on one side of the cover body, be provided with a connector on another side relative with the side, and through the external outlet conduit of connector, when the flexible cover inflation, the connector is closed, when the flexible cover shrink, the connector switches on, such structural design just makes it need not establish the outside at the steel dustcoat with flexible cover, also need not the whole steel dustcoat of flexible cover envelope, and only need flexible cover set up in the hollow structure of the cover body through the inflation or shrink realize crossing the water hole switch on or close can, also need not install its whole transversely in the well when being applied to drainage system (like reposition of redundant personnel well, erection well etc.), it is minimum to occupy the space.

Description

Flexible cut-off equipment and drainage equipment
Technical Field
The application relates to the technical field of drainage, especially, relate to a flexible cut-off equipment and drainage equipment.
Background
The current cut-off device applied to the drainage system adopts a pipeline-shaped rubber sleeve, a sealing chamber is formed between the rubber sleeve and a steel outer cover, when the chamber is inflated, the rubber sleeve is deformed to form 3 points or 4 points to be closed, and when the chamber is deflated, the rubber sleeve restores to the shape of the pipeline under the elasticity of the rubber sleeve.
However, since the pipe-shaped rubber sleeve is sleeved outside the steel housing, it must be installed transversely in a drainage system (such as a diversion well, an installation well, etc.), which occupies a large space, and especially in many wells with tight space, it cannot be installed and maintained normally.
Disclosure of Invention
The application provides a novel flexible cut-off equipment for solve among the prior art the rubber sleeve of pipeline form because the cover is established in the outside of steel dustcoat, make it must transversely install when the installation in drainage system (like reposition of redundant personnel well, erection well etc.), it is very big to occupy the space, especially in the nervous well in a lot of spaces, all can't normally install and the technical problem of maintaining.
In order to solve the above technical problem, in a first aspect, the present application provides a flexible cut-off device, including:
the mask body is internally provided with a hollow structure;
the flexible sleeve is provided with a cavity and is arranged in the hollow structure and can expand or contract in the hollow structure;
the water outlet cover comprises a cover body and is characterized in that a plurality of water through holes are formed in one side face of the cover body, a connector is arranged on the other side face opposite to the side face, a water outlet pipeline is externally connected through the connector, the connector is closed when the flexible sleeve expands, and the connector is conducted when the flexible sleeve contracts.
Optionally, a through hole is formed at the top of the flexible sleeve and is communicated with the chamber.
Optionally, the connection port extends outward in the flow direction of the cover body and is inserted into the nozzle of the water outlet pipe correspondingly.
Optionally, the flexible cut-off device further comprises:
the cover body is cylindrical;
the first support frame is fixed at the top of the cover body;
and one end of the first hanging chain is fixed on the first support frame, and the other end of the first hanging chain is connected with the top of the flexible sleeve.
Optionally, the flexible cut-off device further comprises:
the second support frame is fixed at the bottom of the cover body;
and one end of the second sling chain is fixed on the second support frame, and the other end of the second sling chain is connected with the bottom of the flexible sleeve.
Optionally, the method further includes:
the pipeline group is communicated with the flexible sleeve;
the valve group box is connected with the pipeline group;
and the control box is connected with the valve group box and is used for controlling the on-off of the pipelines in the pipeline group through the valve group box.
Optionally, the method further includes:
the supporting rod is fixed on the ground, the valve group box is fixed on the lower part of the supporting rod, and the control box is fixed on the upper part of the supporting rod.
Optionally, the method further includes:
and the solar panel is fixed on the upper part of the supporting rod and is connected with the control box.
Optionally, the valve train housing comprises:
the valve A is connected with the control box;
and the valve B is connected with the control box and is connected with the valve A through an intermediate pipe.
Optionally, the pipeline set includes:
a pipe A, a pipe orifice of the pipe A is connected with the flexible sleeve,
the other pipe orifice of the pipeline A is communicated with the middle pipe;
and one pipe orifice of the pipeline B is connected with the valve B, and the other pipe orifice of the pipeline B is externally connected with a water supply pipeline.
Optionally, the method further includes:
the pipeline C is communicated with the flexible sleeve;
the valve C is connected with the pipeline C;
and the air compressor is connected with the valve C and used for controlling the flexible sleeve to inflate or deflate through the valve C.
In a second aspect, the present application also provides a drainage apparatus comprising a flexible cut-off device as described in any one of the above
According to the technical scheme, the method has the following advantages:
the application arranges the hollow structure in the cover body, and arranges the flexible sleeve with the cavity in the hollow structure, and the cover body is provided with a water through hole, when the flexible sleeve expands, the water through hole is closed by the flexible sleeve filling the whole hollow structure in the expansion process, when the flexible sleeve shrinks, the water through hole is communicated by the fact that the flexible sleeve does not fill the whole hollow structure in the shrinking process, the structural design ensures that the flexible sleeve does not need to be sleeved outside the steel outer cover as the prior art and does not need to envelop the whole steel outer cover, the flexible sleeve is arranged in the hollow structure of the cover body to realize the conduction or the closing of the water passing hole through expansion or contraction, and when the flexible sleeve is applied to a drainage system (such as a diversion well, an installation well and the like), the whole flexible sleeve does not need to be transversely installed in the well, so that the occupied space is extremely small.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic structural diagram of a flexible cut-off device provided in an embodiment of the present application;
fig. 2 is a first structural view of a flexible cut-off device applied to a diversion well according to an embodiment of the present disclosure;
FIG. 3 is a top view of FIG. 2;
fig. 4 is a structural diagram illustrating a state of the flexible cut-off device applied to a diversion well according to an embodiment of the present application;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic diagram illustrating the connection relationship between a control box, a valve group box and a pipeline group in one embodiment of the flexible cut-off device provided by the embodiment of the present application;
FIG. 7 is a top view of the portion of the structure of FIG. 6;
fig. 8 is a schematic view illustrating a connection relationship between a control box, a valve group box and a pipeline group in another embodiment of the flexible cut-off device provided by the embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present specification are within the protection scope of the present invention; the "and/or" keyword referred to in this embodiment means sum or two cases, in other words, a and/or B mentioned in the embodiments of this specification means two cases of a and B, A or B, and describes three states where a and B exist, such as a and/or B, and means: only A does not include B; only B does not include A; including A and B.
Meanwhile, in the embodiments of the present description, when an element is referred to as being "fixed to" another element, it may be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical", "horizontal", "left", "right" and the like used in the embodiments of the present specification are for illustrative purposes only and are not intended to limit the present invention.
First, before the present application is introduced, the relevant contents of the present application with respect to the application background will be described.
The flexible cut-off device provided by the application can be applied to drainage systems, such as a diversion well, a cut-off well, a regulation pool and the like, taking the diversion well as an example, when the flexible cut-off device is applied to the diversion well, because the application arranges the hollow structure in the cover body, arranges the flexible sleeve with the cavity in the hollow structure, and arranges the water through hole on the cover body, when the flexible sleeve expands, the water through hole fills the whole hollow structure through the flexible sleeve in the expansion process to realize the closing, when the flexible sleeve contracts, the water through hole does not fill the whole hollow structure through the flexible sleeve in the contraction process to realize the conduction, the structural design ensures that the flexible sleeve does not need to be sleeved outside the steel outer cover like the prior art, and does not need to envelop the whole steel outer cover through the flexible sleeve, but only needs to realize the conduction or the closing of the water through the expansion or contraction of the flexible sleeve in the hollow structure of the cover body, when the device is applied to a drainage system (such as a diversion well, an installation well and the like), the device does not need to be installed in the well transversely, and the device has the characteristic of small occupied space.
In the following, the flexible cut-off device provided by the present application will be described in detail.
Example one
Referring to fig. 1 to 8, a flexible cut-off device 1 according to an embodiment of the present application includes: a flexible sleeve 12 and a cover 11. Wherein the flexible sleeve 12 has a chamber 121 for filling with a filler; the cover body 11 is provided with a connecting port 112 for externally connecting a pipeline (such as a pipeline water inlet or a pipeline water outlet of a flow splitting well), a hollow structure 113 for expanding or contracting the flexible sleeve 12 in the cover body 11, and a plurality of water through holes 111 for water circulation are arranged at the opposite side part of the connecting port 112; the flexible sleeve 12 is disposed within the hollow structure 113 and is expandable and contractible within the hollow structure 113.
In the embodiment of the present application, the water through hole 111 may be understood as a hole for water or other fluid to flow through when the flexible cut-off device 1 is communicated with the water outlet pipe 41 of the diversion well, and the flexible sleeve 12 may be a flexible air bag having a contraction and expansion function, and the expansion of the air bag is realized by filling the chamber 121 inside the flexible sleeve 12 with filler, or the contraction of the air bag is realized by discharging the filler through the chamber 121 inside the flexible sleeve 12. When the flexible sleeve 12 expands in the hollow structure 113, the expanded flexible sleeve 12 can fill the whole hollow structure 113 and block the water through hole 111 to close the hollow structure, so that the closure is realized; when the flexible sleeve 12 contracts in the hollow structure 113, the contracted flexible sleeve 12 cannot fill the whole hollow structure 113, and then cannot block the water through hole 111, and finally the water through hole 111 is communicated. As can be understood by those skilled in the art, the structural design is such that the flexible sleeve 12 does not need to be sleeved outside the steel housing as in the prior art, the flexible sleeve 12 does not need to envelop the whole steel housing, the flexible sleeve only needs to be arranged in the hollow structure of the housing body to realize the conduction or the closing of the water through holes through expansion or contraction, and the flexible sleeve does not need to be arranged in the well transversely when being applied to a drainage system (such as a diversion well, an installation well and the like), so that the occupied space is extremely small.
It should be noted that, in the embodiment of the present application, the cover 11 may be cylindrical, the shape of the flexible sleeve 12 is matched with the shape of the cover 11, and a through hole 122 is formed at the top of the flexible sleeve 12 and is communicated with the cavity 121; wherein, a plurality of water holes 111 are opened on one side surface of the cover body 11, a connection port 112 is provided on the other side surface opposite to the side surface, and a pipeline is externally connected through the connection port 112.
Of course, those skilled in the art can understand that the cylindrical shape of the cover 11 is only one structural form of the cover 11 in the embodiment of the present application, besides the cylindrical shape, the cover 11 may also be other structural forms such as a square shape, a trapezoid shape, and the like, and when the structural form of the cover 11 is changed correspondingly, the shape of the flexible sleeve 12 may also be adjusted and changed correspondingly, and the present application is not limited thereto. In other words, the cover 11 structure which can only realize the expansion and deformation of the flexible sleeve 12 to block the water through hole 111 and further realize the shutoff state, and the corresponding flexible sleeve 12 structure can be applied to the present invention.
Further, in order to stabilize the installation of the flexible sleeve 12 in the hollow structure 113 of the cover 11, the embodiment of the present application further includes a first support frame 13 and a first suspension chain 14. Wherein, the first supporting frame 13 is fixed on the top of the cover body 11; the first suspension chain 14 has one end (upper end shown in the figure) fixed to the first support frame 13 and the other end (lower end shown in the figure) connected to the top of the flexible sheath 12.
Furthermore, in order to avoid the influence of the buoyancy of water on the flexible sleeve 12 in the hollow structure 113 of the cover 11, the second support frame 15 and the second sling chain 16 may be further included in the embodiment of the present application. Wherein, the second supporting frame 15 is fixed at the bottom of the cover body 11; the second sling chain 16 has one end (the lower end shown in the figure) fixed on the second support frame 15 and the other end (the upper end shown in the figure) connected with the bottom of the flexible sleeve 12; so that when the flexible jacket 12 is influenced by the buoyancy of water, a pulling force can be generated on the flexible jacket 12 by the second support frame 15 and the second suspension chain 16, and the temperature of the flexible jacket within the hollow structure 113 is further enhanced. Wherein the flexible sleeve 12 is located between the first support frame 13 and the second support frame 15.
Of course, in order to facilitate the quick installation between the cover 11 and the water outlet pipe 41, in the embodiment of the present application, the cover 11 may be a three-way structure, and the connection port 112 extends outward in the flow direction of the cover 11, so as to be bolted to the water inlet pipe 41 through the connection port 112, or directly inserted into the water inlet pipe 41 correspondingly, and clamped therewith.
It should be noted that in the embodiment of the present application, the filling material may be a gas (such as air, nitrogen, inert gas, etc.) or a liquid (such as hydraulic oil, water), etc. As an implementation manner, when the filler is water, please continue to refer to fig. 6, the embodiment of the present application may further include: a line set, a valve set box 18 and a control box 19.
Wherein, the pipeline group is communicated with the chamber 121; the valve group box 18 is connected with the pipeline group; and the control box 19 is connected with the valve group box 18 and is used for controlling the on-off of the pipelines in the pipeline group through the valve group box 18.
As an embodiment of the valve stack 18, it may include: valve a181 and valve B182. Wherein, the valve A181 is connected with the control box 19, and the connecting valve B182 is connected with the control box 19 and is connected with the valve A181 through an intermediate pipe 173.
As an embodiment of the pipe group, it may include: line a171 and line B172. Wherein, one nozzle of the pipeline A171 is connected with the chamber 121, and the other nozzle of the pipeline A171 is communicated with the middle pipe 173; one pipe orifice of the pipe B172 is connected with the valve B182, and the other pipe orifice of the pipe B172 is externally connected with the water supply pipeline 3.
Specifically, when the flexible cut-off device 1 is required to cut off, the control box 19 can control the valve a to be closed and the valve B to be opened, at this time, the water in the water supply pipeline 3 is filled into the cavity in the flexible sleeve 12 through the pipeline B, the middle pipe 173 and the pipeline a in sequence, and then the flexible sleeve 12 begins to expand until the whole hollow structure 113 is filled and the water passing hole is blocked, so that cut-off is formed in sequence. The control principle of the control box 19 for controlling the valve a and the valve B is not limited in the embodiment of the application, and the control principle in the prior art is adopted.
As another embodiment, when the filling material is air, please continue to refer to fig. 8, the embodiment of the present application further includes: a pipeline C173, a valve C183 and an air compressor 194. Wherein, the pipeline C173 is communicated with the flexible sleeve 12; the valve C is connected with the pipeline C; an air compressor 194 is connected to valve C for controlling the inflation or deflation of the flexible sleeve 12 via valve C183. Similarly, the control principle of the control valve C of the air compressor 194 is not limited in the embodiment of the present application, and the control principle in the prior art is adopted.
Further, the embodiment of the present application further includes: support rods 191 and a solar panel 192. The support rod 191 is fixed on the ground, the valve group box 18 is fixed at the lower position of the support rod 191, the air compressor 194 or the control box 19 is fixed at the upper position of the support rod 191, and the solar panel 192 is fixed at the upper position of the support rod 191 and connected with the control box 19 or the air compressor 194. This allows support for the mounting of the valve train housing 18, the control housing 19 or air compressor 194, and the solar panel 192 by the support rod 191.
Of course, it can be understood by those skilled in the art that, in the embodiment of the present invention, in addition to the solar panel 192 converting the solar energy to supply the air compressor 194, the control box 19 and the valve group box 18, the external power source of the control box 19 and/or the valve group box 18 may be directly used to supply power, which is also not limited to the embodiment of the present invention, that is, the external power source of the control box 19 and/or the valve group box 18 may be directly used to supply power.
In the embodiment of the present application, the cover 11 may be fixed on the wall of the well 4 by means of an anchor connection, for example, a plurality of beads 193 may be used to fix the cover 11 on the wall of the well by means of anchors. Of course, the connection mode between the cover body 11 and the well wall may be other modes such as flange connection and bolt connection, and the invention is not limited thereto. The present invention is applicable to any connection method that can fix the cover body 11 to the wall of the well 4.
In summary, the flexible cut-off device provided in the embodiment of the present application can be applied to drainage systems, such as a diversion well, a cut-off well, a regulation pool, etc., taking the diversion well as an example, when the flexible cut-off device is applied to the diversion well, because the application arranges the hollow structure inside the cover body, arranges the flexible sleeve with the cavity inside the hollow structure, and arranges the water through hole on the cover body, when the flexible sleeve expands, the water through hole fills the whole hollow structure through the flexible sleeve in the expansion process to realize the closing, when the flexible sleeve contracts, the water through hole realizes the conduction through the flexible sleeve not filling the whole hollow structure in the contraction process, the structural design makes it not need to arrange the flexible sleeve outside the steel cover as in the prior art, and does not need the flexible sleeve to envelop the whole steel cover, but only needs the flexible sleeve to be arranged in the hollow structure of the cover body to realize the conduction or the closing of the water through the expansion or contraction, when the device is applied to a drainage system (such as a diversion well, an installation well and the like), the device does not need to be installed in the well transversely, and the device has the characteristic of small occupied space.
Example two
Corresponding to the first embodiment of the present application, the second embodiment of the present application provides a drainage apparatus, which includes the flexible cut-off device provided in the first embodiment, and it is understood that the drainage apparatus may be any drainage apparatus in a pipe network system, such as a diversion well, an intercepting well, an installation well, a storage tank, or a drainage system including a diversion well, an intercepting well, an installation well, a storage tank, or other tank bodies, and when the drainage apparatus includes the flexible cut-off device provided in the first embodiment, the flexible cut-off device can be applied to shut off the structures of the diversion well, the intercepting well, the installation well, the storage tank, or other tank bodies, for example, when the diversion well, the intercepting well, the installation well, the storage tank, or other tank bodies need to be shut off, so as to replace the pipe-shaped rubber sleeve adopted in the prior art, a sealed chamber is formed between the rubber sleeve and the steel housing, and when the chamber is inflated, the rubber sleeve deforms to form 3 o 'clock or 4 o' clock closure, when the cavity is deflated, the rubber sleeve is restored to the intercepting device in the shape of the pipeline under the elasticity of the rubber sleeve, the technical problems that the pipeline-shaped rubber sleeve is sleeved outside the steel outer cover, the rubber sleeve needs to be transversely installed in a drainage system (such as a diversion well, an installation well and the like) when being installed, the occupied space is extremely large, and the rubber sleeve cannot be normally installed and maintained in a plurality of wells with nervous space are solved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (12)

1. A flexible flow stop device, comprising:
the mask comprises a mask body (11), wherein a hollow structure (113) is arranged inside the mask body (11);
a flexible sleeve (12), wherein the flexible sleeve (12) is provided with a cavity (121), and the flexible sleeve (12) is arranged in the hollow structure (113) and can expand or contract in the hollow structure (113);
the water outlet cover comprises a cover body (11), wherein a plurality of water passing holes (111) are formed in one side face of the cover body (11), a connecting port (112) is formed in the other side face opposite to the side face, the connecting port (112) is externally connected with a water outlet pipeline (41), when the flexible sleeve (12) expands, the connecting port (112) is closed, and when the flexible sleeve (12) contracts, the connecting port (112) is communicated.
2. The flexible cut-off device of claim 1, wherein:
the top of the flexible sleeve (12) is provided with a through hole (122) and communicated with the chamber (121).
3. The flexible cut-off device of claim 2, wherein:
the connecting port (112) extends outwards in the flow direction of the cover body (11) and is correspondingly inserted into the position of the nozzle of the water outlet pipeline (41).
4. The flexible stop of claim 3, further comprising:
the cover body (11) is cylindrical;
the first support frame (13) is fixed at the top of the cover body (11);
and one end of the first hanging chain (14) is fixed on the first support frame (13), and the other end of the first hanging chain is connected with the top of the flexible sleeve (12).
5. The flexible stop device according to claim 3 or 4, further comprising:
the second supporting frame (15) is fixed at the bottom of the cover body (11);
and one end of the second sling chain (16) is fixed on the second support frame (15), and the other end of the second sling chain is connected with the bottom of the flexible sleeve (12).
6. The flexible stop device according to any one of claims 1 to 4, further comprising:
the pipeline group is communicated with the flexible sleeve (12);
a valve block tank (18) connected to the line block;
and the control box (19) is connected with the valve group box (18) and is used for controlling the on-off of the pipelines in the pipeline group through the valve group box (18).
7. The flexible stop device according to claim 6, further comprising:
the support rod (191) is fixed on the ground, the valve group box (18) is fixed at the lower position of the support rod (191), and the control box (19) is fixed at the upper position of the support rod (191).
8. The flexible stop means according to claim 7, further comprising:
and the solar panel (192) is fixed on the upper part of the support rod (191) and is connected with the control box (19).
9. The flexible cut-off device of claim 6, wherein: the valve block box includes:
a valve A (181) connected to the control box (19);
a valve B (182) connected to the control box (19) and connected to the valve A (181) via an intermediate pipe (173).
10. The flexible flow stop apparatus of claim 9, wherein the piping assembly comprises:
a pipeline A (171), one pipe orifice of the pipeline A (171) is connected with the flexible sleeve (12), and the other pipe orifice of the pipeline A (171) is communicated with the middle pipe (173);
a pipe B (172), one pipe orifice of the pipe B (172) is connected with the valve B (182), and the other pipe orifice of the pipe B (172) is externally connected with a water supply pipeline (3).
11. The flexible stop device according to any one of claims 1 to 4, further comprising:
a conduit C (173) in communication with the flexible sleeve (12);
a valve C (183) connected to the conduit C (173);
and the air compressor (194) is connected with the valve C (183) and is used for controlling the inflation or deflation of the flexible sleeve (12) through the valve C (183).
12. A drain, characterized in that it comprises a flexible cut-off device according to any one of claims 1-11.
CN202010873880.9A 2020-08-26 2020-08-26 Flexible cut-off equipment and drainage equipment Pending CN114352838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010873880.9A CN114352838A (en) 2020-08-26 2020-08-26 Flexible cut-off equipment and drainage equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010873880.9A CN114352838A (en) 2020-08-26 2020-08-26 Flexible cut-off equipment and drainage equipment

Publications (1)

Publication Number Publication Date
CN114352838A true CN114352838A (en) 2022-04-15

Family

ID=81089669

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010873880.9A Pending CN114352838A (en) 2020-08-26 2020-08-26 Flexible cut-off equipment and drainage equipment

Country Status (1)

Country Link
CN (1) CN114352838A (en)

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