[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN219757107U - Impurity removing device for water distributor of cooling tower - Google Patents

Impurity removing device for water distributor of cooling tower Download PDF

Info

Publication number
CN219757107U
CN219757107U CN202320439857.8U CN202320439857U CN219757107U CN 219757107 U CN219757107 U CN 219757107U CN 202320439857 U CN202320439857 U CN 202320439857U CN 219757107 U CN219757107 U CN 219757107U
Authority
CN
China
Prior art keywords
water distributor
water
cooling tower
impurity
filter plate
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN202320439857.8U
Other languages
Chinese (zh)
Inventor
刘金英
周俊
戴姝姝
陈志元
成怡霖
谭晨
马翊尧
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.)
Wuxi University
Original Assignee
Wuxi University
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 Wuxi University filed Critical Wuxi University
Priority to CN202320439857.8U priority Critical patent/CN219757107U/en
Application granted granted Critical
Publication of CN219757107U publication Critical patent/CN219757107U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The utility model provides a cooling tower water distributor impurity removing device, and belongs to the technical field of cooling tower water distributor impurity removing equipment; the impurity removing device comprises a filter plate and a partition plate, wherein the filter plate is arranged in the water distributor and is positioned above a water leakage hole area of the water distributor, the partition plate is arranged in the water distributor and is positioned in an unapertured area of the water distributor, the partition plate and the side wall of the unapertured area form an impurity collecting box, the partition plate is positioned at the end part of the filter plate, an opening at the upper part of the impurity collecting box is communicated with the end part of the filter plate, and the filter plate is obliquely downwards arranged along the direction from one end far away from the impurity collecting box to one end close to the impurity collecting box; the filter plate arranged obliquely is used for filtering cooling water, impurities can slide to one end of the inclined downward direction and fall into the impurity collecting box to be concentrated and stored, maintenance personnel can clean the impurities conveniently, and the cooling tower is prevented from being poor in operation effect due to the fact that the water leakage holes of the water distributor are blocked by the impurities.

Description

Impurity removing device for water distributor of cooling tower
Technical Field
The utility model relates to the technical field of impurity removing equipment of a water distributor of a cooling tower, in particular to an impurity removing device of the water distributor of the cooling tower.
Background
The cooling tower device has close association and application in the fields of air conditioning cooling systems, injection molding, tanning, power generation, steam turbines, air compressors, industrial water cooling and the like. When the cooling tower is installed at the initial stage of the foundation construction and the pipeline connected with the cooling tower is connected with the cooling tower, the inner wall is subjected to the treatment of cleaning, deslagging and rust removal, but along with the long-term intermittent operation of the pipeline, corrosion inhibitors, scale inhibitors and other medicaments are added to improve the water quality, other impurities such as rust blocks and scale blocks are unavoidable, and when the impurities flow back to the water distributor at the top of the cooling tower, the water distributor holes are blocked, so that uneven water distribution, flow reduction and insufficient heat dissipation of the cooling tower are caused, and the normal operation of the whole cooling tower is affected.
The cooling tower comprises a fan, a water delivery pipe, a water distributor and a filler, wherein the water delivery pipe is arranged above the water distributor, the water distributor is generally a container with an opening at the bottom and an opening at the top, the water delivery pipe delivers water into the water distributor, and the water is scattered onto the filler through uniform through holes formed in the bottom; due to the fact that the impurities in the water quality are caused, maintenance personnel need to clean the water distributor of the cooling tower at regular intervals and climb to the top of the tower, and because the water distributor is provided with the cover plates for protection, the maintenance personnel need to open each thick and large-size cover plate, pick up the impurities such as rust by hands, and the like, and a single person is required to take a whole day on a 100-plane top of the tower, so that the efficiency is low and the operation is unsafe, and a device for improving the impurity removal is required to facilitate maintenance of the water distributor by the maintenance personnel.
Disclosure of Invention
The utility model aims to solve the technical problems, and provides a water distributor impurity removing device for a cooling tower, which solves the problems that a water distributor of the existing device is easy to block a water leakage hole by impurities and cooling water cannot be sprayed on a filler.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a cooling tower water distributor edulcoration device, includes filter and division board, the filter is installed in the water distributor and is located the water leakage hole district top of water distributor, the division board is installed in the water distributor and is located the un-perforated district of water distributor, the division board forms impurity collection box with the lateral wall in un-perforated district, the division board is located the filter tip, impurity collection box upper portion opening and filter tip intercommunication, the filter is along keeping away from impurity collection box one end to being close to the direction slope downward arrangement of impurity collection box one end.
The device is characterized in that a filter plate and a partition plate are arranged in an existing water distributor, wherein the filter plate is arranged above a water leakage hole area and is used for flowing in the water leakage hole area after cooling water flows into the water distributor, impurities in the water are blocked in the process of flowing out of the water distributor downwards from the water leakage hole, the partition plate is positioned between an unapertured area and the water leakage hole area, the partition plate, the side wall of the water distributor and the unapertured area at the bottom form a box body with only a top opening, an impurity storage box is positioned at one end of the filter plate, the top opening is communicated with the lowest end of the filter plate, so that the impurities slide in conveniently, namely, the impurity collection box is used for storing the filtered impurities; when the filter plate prevents impurities, the filter plate is integrally inclined, namely, the filter plate is inclined downwards towards the impurity collecting box, and the impurities can slide along the filter plate towards the impurity collecting box, so that the impurities can be collected after the impurities slide into the impurity collecting box from the filter plate; of course, when cooling water flows into the water distributor, impurities can be impacted, the impurities can fall into the impurity collection box along the downward inclined direction after being impacted, maintenance personnel can conveniently clean the impurities in the impurity collection box at regular intervals.
Preferably, a first baffle is arranged at the top end of the impurity collecting box, and the first baffle is movably connected with the water distributor through a first connecting rod;
preferably, the separation plate is in sliding connection with the side wall of the water distributor, and the side wall of the water distributor is provided with a sliding groove for placing the separation plate.
Preferably, the partition plate is provided with a through hole.
Preferably, a supporting piece is arranged at the bottom of the filter plate, and the bottom of the supporting piece is connected with the water distributor. The supporting piece is sleeved with a spring, and the top end of the supporting piece is movably connected with the filter plate.
Preferably, the four corners of the filter plate are provided with circular rings, the circular rings are in sliding connection with the top ends of the supporting pieces, and the top of the supporting pieces can be additionally provided with a blocking piece for preventing the filter plate from sliding out of the top ends of the supporting pieces.
Preferably, the filter plate is provided with a vibrating device, and the vibrating device is used for vibrating the filter plate to convey impurities into the impurity collecting box.
Preferably, the vibration device includes a battery and a vibration motor, and the battery is electrically connected to the vibration motor.
Preferably, the vibration motor is of the type RK370.
Preferably, the vibration motor is arranged at the middle position of the filter plate, and a whole plate without holes can be arranged at the filter plate so as to be convenient for the installation of the vibration motor.
Preferably, the filter plate is provided with a water drop sensor and a controller, and the controller is respectively electrically connected with the water drop sensor and the vibration device.
Preferably, the water drop sensor can be provided with a plurality of, evenly distributed is in the water leakage hole district of water-locator, and convenient more accurate response cooling water flows, and the water drop sensor adopts can the replacement of other sensors that can the response rivers.
Preferably, a second baffle is arranged above the filter plate, the second baffle is connected with the water distributor through a second connecting rod, a solar photovoltaic panel and an MPPT solar controller are arranged at the top of the second baffle, and the MPPT solar controller is electrically connected with the storage battery and the solar photovoltaic panel respectively.
Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:
the utility model provides a cooling tower water distributor impurity removing device, which is characterized in that cooling water is filtered through a filter plate which is obliquely arranged, impurities can slide to one end which is obliquely downward and fall into an impurity collecting box for concentrated storage of the impurities, so that maintenance personnel can conveniently clean the impurities, and poor operation effect of a cooling tower caused by blocking water leakage holes of the water distributor by the impurities is prevented; can be higher the efficient collect impurity fast into impurity collection box in through setting up vibrating device, set up solar photovoltaic board and cool off the absorption of top of the tower solar energy, turn into electric energy power supply energy saving.
Drawings
FIG. 1 is a schematic diagram of a water distributor in the prior art;
FIG. 2 is a schematic view of the apparatus according to embodiment 1 of the present utility model;
FIG. 3 is a schematic top view of the device of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the device of FIG. 2;
FIG. 5 is a schematic view of a filter plate structure;
FIG. 6 is a schematic structural diagram of embodiment 2 of the present utility model;
FIG. 7 is a schematic cross-sectional view of FIG. 6;
FIG. 8 is another schematic view of FIG. 7;
FIG. 9 is a schematic diagram of the structure of embodiment 3 of the present utility model;
FIG. 10 is a schematic cross-sectional view of FIG. 9;
wherein: 100. a water distributor; 200. a water leakage hole area; 300. a non-perforated region; 1. a filter plate; 2. a partition plate; 3. an impurity collection box; 4. a vibration device; 5. a water drop sensor; 6. a controller; 7. a first baffle; 8. a first connecting rod; 9. a second baffle; 10. a second connecting rod; 11. a solar photovoltaic panel; 12. MPPT solar energy controller; 13. a main water pipe; 14. a branch water pipe; 15. coaming plate; 101. a support; 102. a spring; 103. a circular ring; 201. a sliding groove; 202. a through hole; 401. a storage battery; 402. a vibration motor.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and that "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features being referred to; nor does it represent the importance of the components and therefore should not be construed as limiting the utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present utility model.
The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.
Example 1:
referring to fig. 1-5, fig. 1 is a schematic structural diagram of a conventional water distributor 100, wherein a portion of the water distributor 100 with openings therein is a water leakage hole area 200, and a closed bottom without openings is an unapertured area 300.
Referring to fig. 2-5, a cooling tower water distributor impurity removing device comprises a filter plate 1 and a partition plate 2, wherein the filter plate 1 is installed in the water distributor and is positioned above a water leakage hole area of the water distributor, the partition plate 2 is installed in the water distributor and is positioned in an unapertured area of the water distributor, an impurity collecting box 3 is formed by the partition plate 2 and the side wall of the unapertured area, the partition plate 2 is positioned at the end part of the filter plate 1, an opening at the upper part of the impurity collecting box 3 is communicated with the end part of the filter plate 1, and the filter plate 1 is obliquely downwards arranged along the direction from one end far away from the impurity collecting box 3 to the end close to the impurity collecting box 3.
The device is characterized in that the filter plate 1 and the partition plate 2 are arranged in the existing water distributor 100, wherein the filter plate 1 is arranged above a water leakage hole area 200 and is used for flowing into the water leakage hole area 200 after cooling water flows into the water distributor 100, impurities in water are blocked in the process of flowing out of the water distributor 100 downwards from the water leakage holes, the filter plate 1 is a common grid plate, the mesh opening size of the filter plate 1 is set according to the size of scale, for example, the impurities in water of equipment with long running time are more, and the mesh opening diameter can be properly increased so as to meet the condition of large impurity volume; the separation plate 2 is positioned between the non-perforated area 300 and the water leakage hole area 200, the separation plate 2, the side wall of the water distributor 100 and the non-perforated area at the bottom form a box body with only a top opening, the impurity storage box 3 is positioned at one end of the filter plate 1, and the top opening is communicated with the lowest end of the filter plate 1, so that impurities can slide in conveniently, namely the impurity collection box 3 is used for storing filtered impurities; the size of the impurity collecting box 3 is generally set according to the size of the water distributor 100, and the impurity collecting box 3 can be expanded, namely, the side wall of the water distributor 100 is provided with holes to be connected with other collecting containers;
when the filter plate 1 prevents impurities, the filter plate 1 is integrally inclined, namely, is inclined downwards towards the impurity collecting box 3, so that the impurities can slide along the direction from the filter plate 1 to the impurity collecting box 3, and thus, the impurities can be collected after sliding into the impurity collecting box 3 from the filter plate 1; of course, when cooling water flows into the water distributor 100, impurities can be impacted, the impurities can fall into the impurity collection box 3 along the downward inclined direction after being impacted, maintenance personnel can conveniently clean the impurities in the impurity collection box 3 at regular intervals.
In a further embodiment, referring to fig. 6, a first baffle 7 is disposed at the top end of the impurity collecting box 3, the first baffle 7 is movably connected with the water distributor through a first connecting rod 8, and by disposing the first baffle 7 movably connected, a heavy cover plate with the same area as the water distributor 100 is moved relative to the original requirement, and the size of the first baffle 7 is consistent with the size of the opening at the top end of the impurity collecting box 3, so that the water distributor 100 can be protected, and the workload of maintenance personnel is saved.
In a further embodiment, referring to fig. 2, the partition plate 2 is slidably connected to a side wall of the water distributor, and the side wall of the water distributor is provided with a sliding groove 201 for placing the partition plate 2, so that the partition plate 2 is convenient to replace, and the side wall of the water distributor 100 is provided with the sliding groove 201 more conveniently than the fixed connection.
In a further embodiment, the partition plate 2 is provided with a through hole 202, and the through hole is provided to facilitate water flowing into the impurity collecting box 3 to flow back to the water leakage hole of the water distributor, so that the water falls into the filling area.
In a further embodiment, the bottom of the filter plate 1 is provided with a supporting piece 101, and the bottom of the supporting piece 101 is connected with a water distributor. The supporting piece 101 is sleeved with the spring 102, the top end of the supporting piece 101 is movably connected with the filter plate 1, the filter plate 1 is movably connected with the water distributor 100, the spring 102 is arranged to facilitate the up-down vibration, and particularly when the supporting piece is impacted by cooling water, the up-down vibration facilitates the impurity to slide into the impurity collecting box 3 more quickly under the action of the spring 102.
In a further embodiment, referring to fig. 5, four corners of the filter plate 1 are provided with circular rings 103, the circular rings 103 are slidably connected with the top ends of the supporting members 101, so that the direction is fixed when the filter plate is vibrated up and down, and the circular rings 103 are sleeved on the supporting members 101, so that the filter plate 1 is also convenient to replace.
Example 2:
in another embodiment, referring to fig. 1-8, the filter plate 1 is provided with a vibration device 4, the vibration device 4 is used for vibrating the filter plate 1 to convey impurities into the impurity collecting box 3, and the vibration device 4 is arranged to vibrate the filter plate 1 in a small amplitude manner, so that impurities can be effectively and rapidly dropped into the impurity collecting box 3.
In a further embodiment, the vibration device 4 includes a storage battery 401 and a vibration motor 402, the storage battery 401 is electrically connected with the vibration motor 402, and the vibration motor 402 is used to vibrate the filter board 1 up and down, as those skilled in the art should know that the vibration motor 402 should be waterproof, the storage battery 401 is used to supply power to the vibration motor 402, and may be disposed on the water distributor 100 or the filter board 1, so long as power is supplied to the vibration motor 402 to make it work under the condition of water drainage.
In a further embodiment, referring to fig. 7-8, a water drop sensor 5 and a controller 6 are installed at the bottom of the water distributor, the controller 6 is respectively electrically connected with the water drop sensor 5 and the vibration device 4, when the cooling tower works by the induction of the water drop sensor 5, the cooling water flows into the water distributor and is sensed by the water drop sensor 5, a signal is sent to the controller 6, and the controller 6 receives the signal to control the vibration device 4 to start working; by adopting the water drop sensor 5 to sense whether cooling water exists, the working time of the vibration device 4 can be reduced and the electric quantity can be saved in the non-working state such as the shutdown of the cooling tower.
In a further embodiment, a second baffle plate 9 is arranged above the filter plate 1, the second baffle plate 9 is connected with the water distributor through a second connecting rod 10, a solar photovoltaic panel 11 and an MPPT solar controller 12 are arranged at the top of the second baffle plate 9, and the MPPT solar controller 12 is electrically connected with the storage battery 401 and the solar photovoltaic panel 11 respectively; by providing the second baffle 9 for protecting the filter plate 1, a solar photovoltaic panel 11 and an MPPT solar controller 12 are arranged on the second baffle, and the second baffle is used for absorbing solar energy, converting the solar energy into electric energy and transmitting the electric energy to the storage battery 401 to provide additional power supply, so that energy is saved.
Example 3:
in one embodiment, referring to fig. 9-10, the water distributors 100 are generally combined together by a plurality of water distributors 100 on a cooling tower, fig. 9 shows that the impurity removing device of the utility model is respectively arranged in each water distributor 100, the side edges of the water distributors are surrounded by the surrounding plates 15 to prevent cooling water from flowing out, as can be seen from fig. 10, the main water pipe 14 conveys cooling water into the branch water pipe 14 so as to uniformly flow into each water distributor 100, then the impurity filtering is performed by the filter plate 1, the impurity storage is performed by the impurity collecting box 3, and the first baffle 7 is detached by a maintenance person to remove the impurities in the impurity collecting box 3.
It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A cooling tower water distributor edulcoration device, its characterized in that: including filter (1) and division board (2), filter (1) are installed in the water-locator and are located the water leakage hole district top of water-locator, division board (2) are installed in the water-locator and are located the un-perforated district of water-locator, division board (2) and the lateral wall in un-perforated district form impurity collection box (3), division board (2) are located filter (1) tip, impurity collection box (3) upper portion opening and filter (1) tip intercommunication, filter (1) are arranged downwards along being away from impurity collection box (3) one end to being close to the direction slope of impurity collection box (3) one end.
2. The cooling tower water distributor impurity removal device according to claim 1, wherein: the top end of the impurity collecting box (3) is provided with a first baffle (7), and the first baffle (7) is movably connected with the water distributor through a first connecting rod (8).
3. The cooling tower water distributor impurity removal device according to claim 1, wherein: the separation plate (2) is in sliding connection with the side wall of the water distributor, and a sliding groove (201) is formed in the side wall of the water distributor and used for placing the separation plate (2).
4. A cooling tower water distributor edulcoration device according to claim 3, wherein: the partition plate (2) is provided with a through hole (202).
5. The cooling tower water distributor impurity removal device according to claim 1, wherein: a supporting piece (101) is arranged at the bottom of the filter plate (1), and the bottom of the supporting piece (101) is connected with a water distributor; the support piece (101) is sleeved with a spring (102), and the top end of the support piece (101) is movably connected with the filter plate (1).
6. The cooling tower water distributor impurity removal device according to claim 5, wherein: the four corners of the filter plate (1) are respectively provided with a circular ring (103), and the circular rings (103) are in sliding connection with the top ends of the supporting pieces (101).
7. The cooling tower water distributor impurity removal device according to any one of claims 1-6, wherein: install vibrating device (4) on filter (1), vibrating device (4) are used for vibrating filter (1) and carry impurity to impurity collection box (3) in.
8. The cooling tower water distributor impurity removal device according to claim 7, wherein: the vibration device (4) comprises a storage battery (401) and a vibration motor (402), and the storage battery (401) is electrically connected with the vibration motor (402).
9. The cooling tower water distributor impurity removal device according to claim 8, wherein: the bottom of the water distributor is provided with a water drop sensor (5) and a controller (6), and the controller (6) is respectively electrically connected with the water drop sensor (5) and the vibration device (4).
10. The cooling tower water distributor impurity removal device according to claim 9, wherein: the solar energy photovoltaic device is characterized in that a second baffle (9) is arranged above the filter plate (1), the second baffle (9) is connected with the water distributor through a second connecting rod (10), a solar energy photovoltaic panel (11) and an MPPT solar energy controller (12) are arranged at the top of the second baffle (9), and the MPPT solar energy controller (12) is respectively electrically connected with a storage battery (401) and the solar energy photovoltaic panel (11).
CN202320439857.8U 2023-03-09 2023-03-09 Impurity removing device for water distributor of cooling tower Active CN219757107U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320439857.8U CN219757107U (en) 2023-03-09 2023-03-09 Impurity removing device for water distributor of cooling tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320439857.8U CN219757107U (en) 2023-03-09 2023-03-09 Impurity removing device for water distributor of cooling tower

Publications (1)

Publication Number Publication Date
CN219757107U true CN219757107U (en) 2023-09-26

Family

ID=88072982

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320439857.8U Active CN219757107U (en) 2023-03-09 2023-03-09 Impurity removing device for water distributor of cooling tower

Country Status (1)

Country Link
CN (1) CN219757107U (en)

Similar Documents

Publication Publication Date Title
CN114583335B (en) Full-functional lithium ion battery energy storage system
CN111403150A (en) Transformer heat abstractor
CN219757107U (en) Impurity removing device for water distributor of cooling tower
CN220513630U (en) Intelligent filtering device of heat exchange station
CN210342203U (en) Spiral impurity removal type integrated pump station
CN209341781U (en) Drying unit is used in a kind of granulation of fulvic acid
CN221263271U (en) Self-cleaning cable bridge
CN211328570U (en) Mixed feed is with being convenient for collect and efficient pulse dust collector
CN220453810U (en) High-efficient dust removal formula air conditioner inner unit
CN218388494U (en) Automatic control equipment for electric appliance
CN214809198U (en) Cabinet type filtering oil tank
CN209835675U (en) Circulating environmental protection mechanical grating de-dirt machine
CN211753178U (en) Air purification device for factory building
CN210969136U (en) Quick-disassembly and assembly type waste collecting hopper and waste collector for automatic die cutting
CN218833988U (en) A dust device for hydraulic and hydroelectric engineering construction
CN218776230U (en) Device convenient to processing coolant liquid backward flow
CN211743344U (en) Intelligent energy-saving system of communication base station
CN221526272U (en) Drainage structure suitable for low-concentration gas heat accumulation oxidation device
CN215068596U (en) High-temperature early warning device of power equipment
CN215026362U (en) Stone material production is with waste water filter equipment of process of polishing
CN216205443U (en) Cooling tower capable of avoiding water pump idling
CN218188716U (en) Dust removal device of crusher
CN219539632U (en) Vibration filtering equipment
CN211585422U (en) Silicon zirconium alloy production is with energy-saving cooling device that has waste water to collect
CN211143853U (en) Protection canopy for building safety

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant