CN112796275A - Automatic emergent waterwall of come-up - Google Patents

Automatic emergent waterwall of come-up Download PDF

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Publication number
CN112796275A
CN112796275A CN202110126896.8A CN202110126896A CN112796275A CN 112796275 A CN112796275 A CN 112796275A CN 202110126896 A CN202110126896 A CN 202110126896A CN 112796275 A CN112796275 A CN 112796275A
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CN
China
Prior art keywords
air pipe
pipe wall
water
water storage
pipeline
Prior art date
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Pending
Application number
CN202110126896.8A
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Chinese (zh)
Inventor
王子健
胡婧
郭成
魏旭海
郑兴
李芳依
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China Northeast Municipal Engineering Design & Research Institute Co ltd
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China Northeast Municipal Engineering Design & Research Institute 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.)
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Publication date
Application filed by China Northeast Municipal Engineering Design & Research Institute Co ltd filed Critical China Northeast Municipal Engineering Design & Research Institute Co ltd
Priority to CN202110126896.8A priority Critical patent/CN112796275A/en
Publication of CN112796275A publication Critical patent/CN112796275A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B3/00Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/10Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Barrages (AREA)

Abstract

The invention discloses an automatic floating emergency water retaining wall which comprises a water storage tank, wherein a drainage pipeline is arranged below the water storage tank, a floating pipeline and a water inlet pipeline communicated with the ground of a sinking space are arranged above the water storage tank, a folding water storage bag and an inflatable air pipe wall group are arranged in the floating pipeline from bottom to top, and the upper end surface of the inflatable air pipe wall group is flush with the ground of the sinking space when no external water is fed; the ground of the sinking space is provided with a slideway corresponding to the floating pipeline, and the top end of the slideway is provided with a self-locking component for locking the inflatable air pipe wall group. The automatic floating emergency water retaining wall provided by the invention is automatically opened at the position where the water level rises to the height of the folding water storage bag, manual starting is not needed, and the response speed is high; meanwhile, the self-locking assembly ensures that the inflatable air pipe wall group does not lose efficacy after reaching the maximum height, and the waterlogging prevention reliability is high.

Description

Automatic emergent waterwall of come-up
Technical Field
The invention relates to the technical field of municipal engineering, in particular to an automatic floating emergency water retaining wall.
Background
In recent years, extreme weather frequently occurs due to global warming, resulting in an increase in the intensity of local rainstorm. The large and medium-sized cities have the defects that the urban waterlogging situation is more serious due to the fact that the urbanization process is accelerated, the ground impervious area is increased, the runoff coefficient is increased, and the drainage capacity of an urban rainwater pipe network is insufficient, so that the structures of buildings in the cities, the internal power grid and the like are greatly damaged, and various underground spaces such as subways, underground garages and underground passages face severe rainstorm waterlogging risks.
The existing waterlogging prevention measures mainly comprise two measures, namely sand bag arrangement and flood prevention device installation. The sand bag can play a certain water retaining role, but the sealing performance is poor, a large amount of time and labor are consumed for arrangement, and the sand bag is inconvenient to store.
The flood-proof device comprises a flood-proof baffle plate and an emergency inflatable rubber dam, wherein the installation of the flood-proof baffle plate requires that upright posts are arranged on two sides of an entrance and an exit of a building and an underground space, and the flood-proof baffle plate is inserted into flood-proof grooves of the upright posts when the water level of the local area exceeds the height of platforms at the entrance and the exit. Due to the fact that the size of the entrance and the exit is large, the flood-proof baffle plates need to be spliced for use, integrity is poor, installation is complex, multiple persons need to be installed in a matched mode, and timeliness and reliability of water proofing are affected.
The emergency inflation rubber dam needs to embed a U-shaped groove and a rubber bag body in front of a building and be provided with a cover plate, and the rubber bag body is inflated when water is accumulated. The main components such as the U-shaped groove and the rubber bag body need manual inflation and start, and the maintenance workload is large. In addition, the rubber bag body is arranged underground for a long time, so that the service life of rubber is shortened.
In summary, how to provide an anti-waterlogging device with fast response speed and strong reliability is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides an automatic floating emergency water retaining wall, in which an air inflation pipe wall set automatically floats when the water level of a water storage tank reaches a preset height, and the emergency water retaining wall has a fast response speed and high reliability.
In order to achieve the above purpose, the invention provides the following technical scheme:
an automatic floating emergency water retaining wall comprises a water storage tank, wherein a drainage pipeline is arranged below the water storage tank, a floating pipeline and a water inlet pipeline communicated with the ground of a sinking space are arranged above the water storage tank, a foldable water storage bag and an inflatable air pipe wall group are arranged in the floating pipeline from bottom to top, and the upper end surface of the inflatable air pipe wall group is flush with the ground of the sinking space when no external water is fed;
the sinking space is provided with a slide way corresponding to the floating pipeline on the ground, and the top end of the slide way is provided with a self-locking assembly for locking the inflatable air pipe wall group.
Preferably, the inflation air pipe wall group comprises an air pipe wall and a nitrogen air pipe wall, and the nitrogen air pipe wall is arranged below the air pipe wall.
Preferably, the upper end face of the floating pipeline is provided with a cover plate, and the side edge of the cover plate is hinged to the floating pipeline.
Preferably, the folding water storage bag comprises a folding part and an arc part used for being connected with the lower end face of the inflatable air pipe wall group, and the folding part is connected with the lower end face of the arc part.
Preferably, the folding part is formed by folding the waterproof cloth.
Preferably, a support strip is arranged in the circular arc part, and two ends of the support strip are connected with the inner surface of the circular arc part.
Preferably, the self-locking assembly is an arc-shaped contact plate arranged at the top end of the slide way, and the radian of the arc-shaped contact plate is the same as that of the inflatable air pipe wall group;
after the arc contact plate is connected with the inflatable air pipe wall group, the arc contact plate is closed under the pushing of the inflatable air pipe wall group to form self-locking.
Preferably, the upper end of the water inlet pipeline is provided with a water inlet, and a water permeable cover plate is arranged at the water inlet.
When the automatic floating emergency water retaining wall provided by the invention enters water with small water volume or in a short time, accumulated water in a sinking space flows out through the water inlet pipeline, the water storage tank and the water drainage pipeline in sequence.
When large water volume is intake for a long time, accumulated water in the sinking space enters the water storage pool through the water inlet pipeline, so that the water level in the water storage pool rises, when the water level of the water storage pool rises to the folded water storage bag, the folded water storage bag pushes the inflatable air pipe wall group to push the cover plate open and float along the slide way under the action of buoyancy, and the accumulated water is prevented from flowing inwards due to the fact that the upper end face of the inflatable air pipe wall group is higher than the ground of the sinking space.
When the inflation air pipe wall group rises to the top end of the slide way, the self-locking assembly locks the inflation air pipe wall group, the inflation air pipe wall group is prevented from falling due to water loss of the inflation air pipe wall group or water level in the water storage pool caused by the fact that accumulated water passes through the inflation air pipe wall group after the height of the accumulated water exceeds the maximum height of the inflation air pipe wall group, and the inflation air pipe wall group is prevented from losing efficacy after the inflation air pipe wall group reaches the maximum height, and accumulated water inflow is avoided.
Therefore, the automatic floating emergency water retaining wall provided by the invention is automatically opened at the position where the water level rises to the height of the folded water storage bag, manual starting is not needed, and the response speed is high; meanwhile, the self-locking assembly ensures that the inflatable air pipe wall group does not lose efficacy after reaching the maximum height, and the waterlogging prevention reliability is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of an automatic floating emergency water retaining wall provided by the invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic front view of FIG. 1;
FIG. 4 is a schematic view of the inflatable air duct wall assembly of FIG. 1 in a raised position;
FIG. 5 is a schematic structural view of the inflatable air tube wall assembly and the self-locking assembly of FIG. 1 in an unlocked state;
fig. 6 is a schematic structural view of the inflatable air tube wall assembly and the self-locking assembly in fig. 5 in a locking state.
In fig. 1-6:
01 is a sinking space ground, 02 is ponding, 1 is a water storage tank, 2 is a water inlet pipeline, 21 is a permeable cover plate, 3 is a floating pipeline, 31 is a cover plate, 4 is a slide way, 41 is an arc contact plate, 5 is a folding water storage bag, 51 is an arc part, 52 is a folding part, 53 is a support bar, 6 is an inflation air pipe wall group, 61 is an air pipe wall, 62 is a nitrogen air pipe wall, and 7 is a drainage pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide an automatic floating emergency water retaining wall, an inflation air pipe wall group automatically floats when the water level of a water storage tank reaches a preset height, the response speed is high, and the reliability is strong.
Referring to fig. 1 to 6, fig. 1 is a schematic structural view of an embodiment of an automatic floating emergency water retaining wall according to the present invention; FIG. 2 is a schematic top view of FIG. 1; FIG. 3 is a schematic front view of FIG. 1; FIG. 4 is a schematic view of the inflatable air duct wall assembly of FIG. 1 in a raised position; FIG. 5 is a schematic structural view of the inflatable air tube wall assembly and the self-locking assembly in FIG. 1 in an unlocked state; fig. 5 is a schematic structural view of the inflatable air tube wall assembly and the self-locking assembly in fig. 5 in a locking state.
It should be noted that the subsidence space mentioned in this document refers to underground building spaces such as subways, underground garages, underground passages and the like which are prone to waterlogging.
The invention provides an automatic floating emergency water retaining wall, which comprises a water storage tank 1, wherein a drainage pipeline 7 is arranged below the water storage tank 1, a floating pipeline 3 and a water inlet pipeline 2 communicated with the ground 01 of a sinking space are arranged above the water storage tank 1, a folding water storage bag 5 and an inflatable air pipe wall group 6 are arranged in the floating pipeline 3 from bottom to top, and the upper end surface of the inflatable air pipe wall group 6 is flush with the ground 01 of the sinking space when no external water is fed; the sinking space ground 01 is provided with a slideway 4 corresponding to the floating pipeline 3, and the top end of the slideway 4 is provided with a self-locking component for locking the inflatable air pipe wall group 6.
Referring to fig. 1, a water inlet pipe 2 is disposed at one end of the water storage tank 1 near an inlet and an outlet of the sinking space, and the water inlet pipe 2 is provided with a water inlet on a ground 01 of the sinking space, that is, a water outlet of the sinking space. The size of the water inlet and the distance between the water inlet and the outlet of the sinking space are determined in building construction, and therefore, the detailed description is omitted.
Preferably, the upper end of the water inlet pipe 2 is provided with a water inlet, the water inlet is provided with a water permeable cover plate 21, and the type of the water permeable cover plate 21 refers to the prior art and is not described herein again.
The water storage tank 1 is used for containing accumulated water 02 flowing in from the water inlet pipeline 2, and the volume of the water storage tank 1 is designed and calculated according to the water inflow of a sinking space to be protected; the reservoir 1 may be provided as a rectangular reservoir, a cylindrical reservoir or any other geometrical shape.
A drainage pipeline 7 is arranged below the water storage tank 1, the sectional area of the drainage pipeline 7 limits the unit drainage capacity of the water storage tank 1, and the size of the drainage pipeline 7 needs to be determined by integrating factors such as the water inflow of a sinking space to be protected and the common water inflow of the sinking space.
The floating pipeline 3 and the corresponding slide way 4 jointly provide a lifting channel of the inflatable air pipe wall group 6 and the folding water storage bag 5, and the upper end surface of the inflatable air pipe wall group 6 is flush with the ground 01 of the sinking space when no external water enters or the water level in the water storage tank 1 is lower than the lower end surface of the folding water storage bag 5; when the water level in the water storage tank 1 is higher than the lower end surface of the folding water storage bag 5, the accumulated water 02 is injected into the folding water storage bag 5, and the inflatable air pipe wall group 6 floats upwards under the action of buoyancy.
Therefore, the starting time of the inflation air pipe wall group 6 is related to the volume of the water storage tank 1, and the volume of the water storage tank 1 can be changed according to the added or reduced volume blocks, so that the purpose of adjusting the starting time of the inflation air pipe wall group 6 is achieved.
In order to avoid that the inflation air pipe wall group 6 directly floats to the top end of the slide way 4 during floating, the inflation air pipe wall group 6 can comprise a first inflation air pipe wall and a second inflation air pipe wall, the molecular mass of the gas in the first inflation air pipe wall is larger than that of the second inflation air pipe wall, namely the gas in the first inflation air pipe wall is heavier than the gas in the second inflation air pipe wall, so that the floating speed of the inflation air pipe wall group 6 is limited.
Preferably, the inflation air pipe wall group 6 includes an air pipe wall 61 and a nitrogen air pipe wall 62, and the nitrogen air pipe wall 62 is disposed under the air pipe wall 61 in consideration of inflation cost, required buoyancy value, and safety.
The specific combination form of the air tube wall 61 and the nitrogen tube wall 62 in the inflation tube wall group 6 is matched according to the actual use condition, and is not limited to the arrangement of the nitrogen tube wall 62 below the air tube wall 61, nor the combination form of the nitrogen tube wall and the air tube wall.
Because the average molecular mass of the air is 29 and the molecular mass of the nitrogen is 28, the inflatable air pipe wall group 6 is effectively prevented from directly floating to the top end of the slide 4; because the folding water storage bag 5 and the water inlet pipeline 2 form a communicating vessel, when the water level above the ground 01 of the sinking space increases, the inflatable air pipe wall group 6 floats upwards to drive the folding water storage bag 5 to ascend so as to keep the water level in the folding water storage bag 5 the same as the water level in the sinking space.
The folding water storage bag 5 and the water inlet pipeline 2 form a communicating vessel, when the folding water storage bag 5 enters water, the folding water storage bag 5 extends and is driven by buoyancy to float the inflatable air pipe wall group 6. Preferably, referring to fig. 1 or 4, the foldable water storage bag 5 includes a folding portion 52 and a circular arc portion 51 for connecting with the lower end surface of the inflatable air tube wall group 6, and the folding portion 52 is connected to the lower end surface of the circular arc portion 51.
Preferably, the folding portion 52 is formed by folding the tarpaulin, and the type and folding manner of the tarpaulin refer to the prior art and are not described herein again.
In order to maintain the shape of the folded water storage bag 5, referring to fig. 3, it is preferable that a support strip 53 is provided in the circular arc portion 51, and both ends of the support strip 53 are connected to the inner surface of the circular arc portion 51. After the supporting strip 53 is unfolded, two ends of the supporting strip 53 are clamped between two opposite side surfaces of the slideway 4, and a transverse supporting force is provided for the folding water storage bag 5. In order to reduce mass and cost, the support bars 53 may be made of plastic material.
When water enters in a small amount or in a short time, accumulated water 02 in the sinking space sequentially flows out through the water inlet pipeline 2, the water storage tank 1 and the water drainage pipeline 7.
When water enters the water storage tank 1 for a long time with a large water amount, accumulated water 02 in the sinking space enters the water storage tank 1 through the water inlet pipeline 2, so that the water level in the water storage tank 1 rises, when the water level of the water storage tank 1 rises to the extent that the folding water storage bag 5 enters the water and the length of the water storage bag increases, the folding water storage bag 5 pushes the inflatable air pipe wall group 6 to float upwards along the slide way 4, the upper end face of the inflatable air pipe wall group 6 is higher than the ground 01 of the sinking space, and the inflow of the accumulated water 02; when the inflatable air pipe wall group 6 rises to the top end of the slide way 4, the self-locking assembly locks the inflatable air pipe wall group 6, the phenomenon that the inflatable air pipe wall group 6 descends due to the fact that accumulated water flows over the inflatable air pipe wall group 6 or the water level in the water storage pool 1 descends after the accumulated water 02 is higher than the maximum height of the inflatable air pipe wall group 6 is avoided, the inflatable air pipe wall group 6 is guaranteed not to lose efficacy after the maximum height is reached, and the phenomenon that the accumulated water flows in 02 is avoided.
In the embodiment, the inflatable air pipe wall group 6 is automatically opened at the position where the water level of the water storage tank 1 rises to the height of the folding water storage bag 5, manual starting is not needed, and the response speed is high; meanwhile, the self-locking assembly ensures that the inflatable air pipe wall group 6 does not lose efficacy after reaching the maximum height, and the waterlogging prevention reliability is high.
In order to avoid that the upper end surface of the inflation air pipe wall group 6 is higher than the ground 01 of the sinking space when no external water enters, preferably, the upper end surface of the floating pipeline 3 is provided with a cover plate 31, and the side edge of the cover plate 31 is hinged with the floating pipeline 3. When the inflation air pipe wall group 6 floats upwards, the inflation air pipe wall group 6 pushes the cover plate 31 away by buoyancy to enter the slide way 4, as shown in fig. 4.
The cover plate 31 is hinged with the floating pipeline 3 through a hinge or a pin shaft and the like.
On the basis of the above embodiment, the self-locking assembly is defined as an arc contact plate 41 arranged at the top end of the slide way 4, and the radian of the arc contact plate 41 is the same as that of the inflatable air pipe wall group 6; after the arc contact plate 41 is contacted with the inflation air pipe wall group 6, the arc contact plate 41 is closed under the pushing of the inflation air pipe wall group 6 to form self-locking.
Referring to fig. 5 and 6, the arc contact plates 41 are respectively disposed at the corners between the top surface and the two side surfaces of the slideway 4. When the inflation air pipe wall group 6 rises to the top end of the slide way 4, the inflation air pipe wall group 6 generates thrust to the arc contact plates 41 on the two sides, and the arc contact plates 41 on the two sides are extruded, so that the lower end surfaces of the arc contact plates 41 are attached to the lower end surface of the air pipe wall 61, as shown in fig. 6, and the fixation of the position of the inflation air pipe wall group 6 is realized.
In addition, other common self-locking modes can be used for realizing self-locking of the inflatable air pipe wall group 6, for example, a crotch-shaped or arrow-shaped clamping protrusion is arranged on one of the inner wall surface of the top surface of the slideway 4 and the inflatable air pipe wall group 6, a clamping groove is arranged on the other one, and a limiting clamping groove is arranged on the side wall surface of the clamping groove. When the inflatable air pipe wall group 6 floats upwards, the clamping protrusions are clamped with the clamping grooves, and the branches of the clamping protrusion side faces enter the limiting clamping grooves, so that the axial displacement of the clamping protrusions is limited.
It should be noted that the references to the first and second of the first and second inflation tube walls herein are merely used to distinguish between different locations and do not imply a limitation on the order or combination of inflation.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The automatic floating emergency water retaining wall provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (8)

1. An automatic floating emergency water retaining wall is characterized by comprising a water storage tank (1), wherein a drainage pipeline (7) is arranged below the water storage tank (1), a floating pipeline (3) and a water inlet pipeline (2) communicated with a sinking space ground (01) are arranged above the water storage tank (1), a folding water storage bag (5) and an inflatable air pipe wall group (6) are arranged in the floating pipeline (3) from bottom to top, and the upper end surface of the inflatable air pipe wall group (6) is flush with the sinking space ground (01) when no external water is fed;
be equipped with on sunken space ground (01) with slide (4) that come up pipeline (3) correspond, the top of slide (4) is equipped with the locking aerify trachea wall group's (6) auto-lock subassembly.
2. The automatically floating emergency retaining wall according to claim 1, wherein the inflation air pipe wall set (6) comprises an air pipe wall (61) and a nitrogen air pipe wall (62), and the nitrogen air pipe wall (62) is arranged below the air pipe wall (61).
3. The automatic floating emergency water retaining wall according to claim 1, wherein a cover plate (31) is arranged on the upper end surface of the floating pipeline (3), and the side edge of the cover plate (31) is hinged with the floating pipeline (3).
4. The automatic floating emergency water retaining wall according to claim 1, wherein the folding water storage bag (5) comprises a folding portion (52) and a circular arc portion (51) for connecting with the lower end surface of the inflatable air pipe wall group (6), and the folding portion (52) is connected with the lower end surface of the circular arc portion (51).
5. The automatic floating emergency water retaining wall according to claim 4, wherein the folding portion (52) is formed by folding waterproof cloth.
6. The automatic floating emergency water retaining wall according to claim 4, wherein a support strip (53) is arranged in the circular arc portion (51), and both ends of the support strip (53) are connected with the inner surface of the circular arc portion (51).
7. The automatic floating emergency water retaining wall according to any one of claims 1 to 6, wherein the self-locking assembly is an arc-shaped contact plate (41) arranged at the top end of the slide way (4), and the radian of the arc-shaped contact plate (41) is the same as that of the inflatable air pipe wall group (6);
after the arc contact plate (41) is contacted with the inflatable air pipe wall group (6), the arc contact plate (41) is closed under the pushing of the inflatable air pipe wall group (6) to form self-locking.
8. The automatic floating emergency water retaining wall according to claim 7, wherein the upper end of the water inlet pipeline (2) is provided with a water inlet, and the water inlet is provided with a water permeable cover plate (21).
CN202110126896.8A 2021-01-29 2021-01-29 Automatic emergent waterwall of come-up Pending CN112796275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110126896.8A CN112796275A (en) 2021-01-29 2021-01-29 Automatic emergent waterwall of come-up

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110126896.8A CN112796275A (en) 2021-01-29 2021-01-29 Automatic emergent waterwall of come-up

Publications (1)

Publication Number Publication Date
CN112796275A true CN112796275A (en) 2021-05-14

Family

ID=75812900

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110126896.8A Pending CN112796275A (en) 2021-01-29 2021-01-29 Automatic emergent waterwall of come-up

Country Status (1)

Country Link
CN (1) CN112796275A (en)

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