CN112012321A - Three-dimensional intelligent rotary ejector for sludge in pump station or storage tank - Google Patents
Three-dimensional intelligent rotary ejector for sludge in pump station or storage tank Download PDFInfo
- Publication number
- CN112012321A CN112012321A CN201910451431.2A CN201910451431A CN112012321A CN 112012321 A CN112012321 A CN 112012321A CN 201910451431 A CN201910451431 A CN 201910451431A CN 112012321 A CN112012321 A CN 112012321A
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- Prior art keywords
- movable arm
- injector
- head
- pump station
- storage tank
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
- E03F5/108—Cleaning devices providing a flushing surge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a three-dimensional intelligent rotary injector for sludge in a pump station or a storage tank, which comprises a submersible pump, a water supply pipe, an injector support, an injector stand pipe 4, an injection controller, a rotary turntable, a turntable hinged seat, a front-end water supply pipe, a movable arm lifting mechanism, an injection head, a connecting hose and an injection head swinging mechanism, wherein the rotary turntable is connected with the front-end water supply pipe through a rotary turntable hinge seat; by adopting the technical scheme, the washing direction and distance of the sprayed water body can be reasonably controlled, and the washing efficiency is high; the equipment can rotate at 260 degrees, and the washing range is large and the effect is good; the equipment can carry out 260 degrees no dead angles to pump station, regulation pond wall deposit and wash, and equipment cooperation immersible pump operation, and the user can freely set up the operation and wash the procedure, washes the water source and utilizes pump station or regulation pond own water source, can be point-to-point washed, also can the wide-angle rotation wash, reciprocates and washes, simple structure is clear, reaches the best washing effect.
Description
Technical Field
The invention relates to flushing equipment, in particular to a three-dimensional intelligent rotary ejector for sludge in a pump station or a storage tank.
Background
The pump station is the most common engineering measure in municipal facility construction; the pumping stations are distributed in urban drainage or water supply systems and the like, and mainly have the functions of supplying or discharging water bodies in the water supply or drainage systems according to the design direction through water pumps, for example, in the drainage systems, the pumping stations can be divided into rainwater pumping stations, sewage pumping stations, rainwater-sewage combined pumping stations and the like;
the investigation storage pool is an engineering measure for preventing urban waterlogging; when the urban rainfall exceeds the water delivery capacity of urban drainage pipelines, in order to prevent the waterlogging phenomenon, the rain sewage exceeding the delivery capacity of the drainage pipelines is stored in the regulation and storage tank by adopting the regulation and storage tank, and after the rainfall is finished, the rain sewage is discharged through the submersible sewage pump, so that the urban waterlogging is prevented.
The pump stations are distributed in municipal facilities in a large number, the pump station sedimentation and cleaning are important work for maintaining the pump stations, one of the main reasons of sedimentation is that part of water body generates backflow to form sediment sedimentation caused by the deviation of a designed water inlet mode of the pump stations, and the sedimentation further increases the generation of poor flow state; on the other hand, the reason is caused by the quality of inlet water or sand content, so that sediment is deposited, some pollutants are attached to the wall of the pump station, the function of the pump station is reduced, and even the pollution phenomenon of the pump station is caused.
And the initial stage rainwater or confluence system rain dirt that regulation pond received when heavy rain play the regulation effect, and this regulation process leads to some suspended substance to deposit on regulation pond bottom or wall, needs in time clear up after the rain.
The common storage tank flushing equipment comprises a flushing door and a flushing hydraulic tipping bucket, the flushing door needs to divide the storage tank into a plurality of units for flushing respectively, accumulated water can only be flushed once each time, and if sludge is too much and too thick, the storage tank is difficult to flush cleanly and becomes long, so that the function of the storage tank is lost, and the storage tank is finally discarded; the scouring hydraulic tipping bucket and the scouring door are uniform in a one-time scouring process, the scouring hydraulic tipping bucket needs to have a certain height when being installed, enough scouring force can be generated, the height space of urban drainage pipelines is often insufficient, the use range and the effect of the hydraulic tipping bucket are greatly limited, the flushing water flow only moves on the horizontal plane, and 360-degree all-dimensional dead-angle-free flushing is difficult to realize.
In washing, the pump station is washed and often need to shut down the maintenance, and by artifical clearance, regulation pond also needs artifical desilting, and pump station and the artifical desilting difficulty in regulation pond are great, and working strength is high, and work is dangerous big.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a three-dimensional intelligent rotary injector for sludge in a pump station or a storage tank, through the technical scheme, a water source of the pump station or the storage tank is utilized to effectively flush the bottom or the side wall surface of the pump station or the storage tank, even the top of the pump station or the storage tank, the three-dimensional all-dimensional flushing has no dead angle, the equipment swings at 260 degrees in the horizontal direction and at 180 degrees in the vertical direction, and the whole equipment is matched with a drainage pump of the pump station or the storage tank to operate, so that the sludge in the pump station or the storage tank can be flushed more thoroughly, the work efficiency is improved, the labor intensity of the working personnel is reduced, the work safety is improved, and the three.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a three-dimensional intelligent rotary ejector for sludge in a pump station or a storage tank comprises a submersible pump, a water supply pipe, an ejector support, an ejector stand pipe 4 and an ejection controller, wherein the ejector support is fixed on the ground at the bottom of the pump station or the storage tank, the lower end of the ejector stand pipe is fixed on the ejector support, one end of the water supply pipe is communicated with the ejector support, the other end of the water supply pipe is communicated with a water outlet of the submersible pump, an ejection controller is arranged at the top of the ejector stand pipe, and the three-dimensional intelligent rotary ejector also comprises a rotary turntable, a turntable hinged seat, a front-end water supply pipe, a movable arm lifting mechanism, an ejection; the rotary turntable is arranged on the upper portion of the ejector stand column pipe, the rotary table hinge base is fixed on the side wall of the rotary turntable, one end of the movable arm is hinged to the rotary table hinge base, the ejector head is hinged to the other end of the movable arm, the front-end water supply pipe is fixed on the side face of the movable arm, the ejector stand column pipe is communicated with one end of the front-end water supply pipe located at the rear portion of the movable arm through the connecting hose, the other end of the front-end water supply pipe located at the front portion of the movable arm is communicated with the ejector head through the connecting hose, the movable arm lifting mechanism is arranged on the rotary table hinge base, the movable end of the movable arm lifting mechanism is connected with the movable arm, the ejector.
As a further technical scheme, the movable arm lifting mechanism is composed of a movable arm fixing seat, a movable arm connecting seat and a movable arm moving hydraulic shaft, wherein the movable arm fixing seat is fixed on a turntable hinging seat, the movable arm connecting seat is fixed on the movable arm, the fixed end of the movable arm moving hydraulic shaft is hinged on the movable arm fixing seat, and the movable end of the movable arm moving hydraulic shaft is hinged on the movable arm connecting seat.
As further technical scheme, injector head swing mechanism connects the back seat by injector head fixing base, injector head and connects the front stall, the injector head is connected preceding pole, injector head and is connected back pole and injector head swing hydraulic shaft and constitute, the injector head fixing base is fixed in digging arm rear portion top, and the injector head is connected the back stall and is fixed in the anterior top of digging arm, and the injector head is connected the front stall and is fixed in injector head middle part top, and the injector head is connected back pole one end and is connected the back stall and articulate mutually with the injector head, and the injector head is connected preceding pole one end and is connected the front stall and articulate mutually, and the stiff end of injector head swing hydraulic shaft articulates on the injector head fixing base, and the other end that the pole was connected the back pole.
As a further technical scheme, the injection controller consists of a circuit controller and a hydraulic controller, the circuit controller is connected with the submersible pump, the rotary turntable and the hydraulic controller through leads, and the hydraulic controller is respectively connected with the movable arm moving hydraulic shaft and the injection head swinging hydraulic shaft through connecting oil pipes.
As a further technical scheme, the spraying controller also comprises a waterproof cap which is buckled and fixed on the spraying controller.
The beneficial effect after adopting above-mentioned technical scheme is: a pump station or storage tank sludge three-dimensional intelligent rotary injector can form flushing water flow through the technical scheme, and the pump station or the storage tank can be efficiently flushed; the movable arm swings by 260 degrees in the horizontal direction by taking the ejector upright post pipe as a center, and the ejector head can move up and down by nearly 180 degrees in the vertical direction, so that the bottom of a pump station or a regulation pool can be flushed, and the wall around the pump station or the regulation pool can be flushed without dead angles; the circuit controller of the injection controller is controlled by control software, so that a plurality of energy-saving operation modes of stirring and flushing can be realized; the technical scheme is particularly suitable for washing the bottom and the wall of an irregular rainfall flood pump station or a regulation and storage pool; the pump station or the regulating and storing tank can be used for washing by using the water source.
Drawings
Fig. 1 is a schematic structural view of the horizontal working state of the present invention.
Fig. 2 is a structural diagram illustrating the downward operation state of the present invention.
Fig. 3 is a schematic view of the upward working structure of the present invention.
In the figure, 1 immersible pump, 2 delivery pipes, 3 injector supports, 4 injector stand pipes, 5 injection controllers, 6 rotating turntables, 7 turntable hinged seats, 8 front end delivery pipes, 9 movable arms, 10 injection heads, 11 movable arm fixed seats, 12 movable arm connecting seats, 13 movable arm moving hydraulic shafts, 14 injection head fixed seats, 15 injection head connecting rear seats, 16 injection head connecting front seats, 17 injection head connecting front rods, 18 injection head connecting rear rods, 19 injection head swinging hydraulic shafts and 20 waterproof caps.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, the three-dimensional intelligent rotary injector for sludge in a pump station or a storage tank according to the present invention comprises a submersible pump 1, a water supply pipe 2, an injector support 3, an injector stand pipe 4 and an injection controller 5, wherein the injector support 3 is fixed on the ground at the bottom of the pump station or the storage tank, the lower end of the injector stand pipe 4 is fixed on the injector support 3, one end of the water supply pipe 2 is communicated with the injector support 3, the other end of the water supply pipe 2 is communicated with a water outlet of the submersible pump 1, the injection controller 5 is arranged at the top of the injector stand pipe 4, and the three-dimensional intelligent rotary injector further comprises a rotary turntable 6, a turntable hinged seat 7, a front end water supply pipe 8, a movable arm 9, a movable arm lifting mechanism; the rotary turntable 6 is arranged on the upper portion of the ejector stand column tube 4, the turntable hinge seat 7 is fixed on the side wall of the rotary turntable 6, one end of the movable arm 9 is hinged on the turntable hinge seat 7, the ejector head 10 is hinged on the other end of the movable arm 9, the front-end water supply tube 8 is fixed on the side face of the movable arm 9, the ejector stand column tube 4 is communicated with one end of the front-end water supply tube 8 positioned at the rear portion of the movable arm 9 through a connecting hose, the other end of the front-end water supply tube 8 positioned at the front portion of the movable arm 9 is communicated with the ejector head 10 through a connecting hose, the movable arm lifting mechanism is arranged on the turntable hinge seat 7, the movable end of the movable arm lifting mechanism is connected with the movable arm 9, the ejector head swinging mechanism is arranged.
As a further embodiment, the movable arm lifting mechanism is composed of a movable arm fixing seat 11, a movable arm connecting seat 12 and a movable arm moving hydraulic shaft 13, the movable arm fixing seat 11 is fixed on the turntable hinge seat 7, the movable arm connecting seat 12 is fixed on the movable arm 9, a fixed end of the movable arm moving hydraulic shaft 13 is hinged on the movable arm fixing seat 11, and a movable end of the movable arm moving hydraulic shaft 13 is hinged on the movable arm connecting seat 12.
As a further embodiment, the injector head swing mechanism is composed of an injector head fixing seat 14, an injector head connection rear seat 15, an injector head connection front seat 16, an injector head connection front rod 17, an injector head connection rear rod 18 and an injector head swing hydraulic shaft 19, the injector head fixing seat 14 is fixed above the rear portion of the movable arm 9, the injector head connection rear seat 15 is fixed above the front portion of the movable arm 9, the injector head connection front seat 16 is fixed above the middle portion of the injector head 10, one end of the injector head connection rear rod 18 is hinged to the injector head connection rear seat 15, one end of the injector head connection front rod 17 is hinged to the injector head connection front seat 16, the fixed end of the injector head swing hydraulic shaft 19 is hinged to the injector head fixing seat 14, and the movable end of the injector head swing hydraulic shaft 19 is hinged to one position together with the other end of.
As a further embodiment, the injection controller 5 is composed of a circuit controller and a hydraulic controller, the circuit controller is connected with the submersible pump 1, the rotary turntable 6 and the hydraulic controller through wires, and the hydraulic controller is respectively connected with the movable arm moving hydraulic shaft 13 and the injector head swinging hydraulic shaft 19 through connecting oil pipes.
As a further embodiment, a waterproof cap 20 is further included, and the waterproof cap 20 is fastened and fixed on the spray controller 5.
In the present invention, the connection hose is used to connect the front water supply pipe 8 and the spray head 10, so that the movable arm 9 and the spray head 10 can respectively swing up and down, and the details are not repeated herein for the prior art.
When the invention works, the submersible pump 1 provides strong high-speed water flow through the water supply pipe 2, the high-speed water flow passes through the water supply pipe 2, the ejector support 3, the ejector upright post pipe 4 and the front end water supply pipe 8 to be ejected out of the ejection head 10, and the rotary turntable 6 in work can provide a reciprocating swing angle and a swing speed according to the requirements of control software in the ejection controller 5.
In the invention, the movable arm 9 and the spray head 10 realize the non-missing flushing through the control software in the spray controller 5 under the composite action of the movable arm moving hydraulic shaft 13 and the spray head swinging hydraulic shaft 19, and can also realize the intelligent operation by matching with the video monitoring and image recognition technology.
The technical scheme of the invention is that the injection control device 5 can adopt a bidirectional hydraulic transmission technology, hydraulic power of smaller equipment can be arranged in the injection control device 5, and larger equipment is supplied by an external control room hydraulic station.
When the movable arm moving hydraulic shaft 13 extends outwards in the working process, the front end of the movable arm 9 swings downwards under the action of the pushing force, the spraying head 10 can flush the bottom of a pump station or a storage tank, and when the movable arm moving hydraulic shaft 13 contracts inwards, the front end of the movable arm 9 rises upwards under the action of the pulling force, so that the wall surface or the top cover of the pump station or the storage tank can be flushed.
Similarly, when the injector head swinging hydraulic shaft 19 extends outwards, the injector head connecting front rod 17 and the injector head connecting rear rod 18 are pushed to integrally rotate forwards, so that the direction of the injector head 10 is downward, and the injector head 10 can flush the bottom of a pump station or a storage tank or flush the bottom from top to bottom; when the spray head swinging hydraulic shaft 19 is retracted inwards, the spray head connecting front rod 17 and the spray head connecting rear rod 18 are pulled to rotate backwards integrally, so that the spray head 10 is upward, and at the moment, the spray head 10 can flush the wall surface or the top of a pump station or a storage tank.
In the working process of the invention, the movable arm 9 and the spray head 10 respectively act or jointly act in a combined way, so that the bottom, the wall surface and the top of a pump station or a storage tank can be flushed in all directions.
According to the technical scheme, a double-rod connecting structure of the spray head connecting front rod 17 and the spray head connecting rear rod 18 is adopted, the spray head connecting front rod 17 and the spray head connecting rear rod 18 form a stable triangular structure with the spray head 10, so that the spray head 10 moves more safely and stably, and the counterforce of high-speed water flow is resisted effectively.
The arrangement of the waterproof cap 20 in the invention can not only effectively ensure that the injection controller 5 is not wetted by rainwater and not exposed to the sun, but also ensure that a certain air isolation space is formed in the waterproof cap 20 without influencing water inflow in the injection controller 5 because a certain amount of air is in the waterproof cap 20 when the water level of a pump station or a storage tank is over the waterproof cap 20.
In practical application, the invention can divide a pump station or a storage tank into a plurality of working areas according to actual conditions, respectively arrange the rotary injector of the technical scheme in each corresponding working area, uniformly supply water by one or a plurality of submersible pumps 1, utilize control software and a camera monitoring system, after each flushing is finished, the camera monitoring system memorizes the flushing conditions of each grid area into a software correction program according to the flushing conditions of each grid area, and in the next flushing process, the added memory conditions are used for adjusting the operation parameters in the grid areas, so that silting can be thoroughly removed, dead corners are not left, and continuous correction can be realized, the best working efficiency and the most economic operation mode can be realized, and the optimal energy-saving operation effect can be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention.
Claims (5)
1. A three-dimensional intelligent rotary injector for sludge in a pump station or a storage tank comprises a submersible pump, a water supply pipe, an injector support, an injector stand pipe and an injection controller, wherein the injector support is fixed on the ground or the wall at the bottom of the pump station or the storage tank; the rotary turntable is arranged on the upper portion of the ejector stand column pipe, the rotary table hinge base is fixed on the side wall of the rotary turntable, one end of the movable arm is hinged to the rotary table hinge base, the ejector head is hinged to the other end of the movable arm, the front-end water supply pipe is fixed on the side face of the movable arm, the ejector stand column pipe is communicated with one end of the front-end water supply pipe located at the rear portion of the movable arm through the connecting hose, the other end of the front-end water supply pipe located at the front portion of the movable arm is communicated with the ejector head through the connecting hose, the movable arm lifting mechanism is arranged on the rotary table hinge base, the movable end of the movable arm lifting mechanism is connected with the movable arm, the ejector.
2. The three-dimensional intelligent rotary sprayer for the sludge in the pump station or the storage tank according to claim 1, wherein the movable arm lifting mechanism is composed of a movable arm fixing seat, a movable arm connecting seat and a movable arm moving hydraulic shaft, the movable arm fixing seat is fixed on a turntable hinge seat, the movable arm connecting seat is fixed on the movable arm, the fixed end of the movable arm moving hydraulic shaft is hinged on the movable arm fixing seat, and the movable end of the movable arm moving hydraulic shaft is hinged on the movable arm connecting seat.
3. The pump station or storage tank sludge stereoscopic intelligent rotary sprayer according to claim 1, it is characterized in that the injector head swinging mechanism consists of an injector head fixing seat, an injector head connecting rear seat, an injector head connecting front rod, an injector head connecting rear rod and an injector head swinging hydraulic shaft, the utility model discloses a portable jet head, including injection head swing hydraulic shaft, injection head fixing base, injector head, back seat, injector head, ejector head, back rod, injector head.
4. The stereoscopic intelligent rotary sprayer for sludge in a pump station or a storage tank according to any one of claims 1 to 3, wherein the spray controller is composed of a circuit controller and a hydraulic controller, the circuit controller is connected with the submersible pump, the rotary turntable and the hydraulic controller through wires, and the hydraulic controller is respectively connected with the movable arm moving hydraulic shaft and the spray head swinging hydraulic shaft through connecting oil pipes.
5. The stereoscopic intelligent rotary sprayer for sludge in a pump station or a storage tank according to claim 1, further comprising a waterproof cap, wherein the waterproof cap is buckled and fixed on the spray controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451431.2A CN112012321A (en) | 2019-05-28 | 2019-05-28 | Three-dimensional intelligent rotary ejector for sludge in pump station or storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451431.2A CN112012321A (en) | 2019-05-28 | 2019-05-28 | Three-dimensional intelligent rotary ejector for sludge in pump station or storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112012321A true CN112012321A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910451431.2A Pending CN112012321A (en) | 2019-05-28 | 2019-05-28 | Three-dimensional intelligent rotary ejector for sludge in pump station or storage tank |
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| CN (1) | CN112012321A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492069A (en) * | 2021-07-22 | 2021-10-12 | 德诺尔流体设备（武汉）有限公司 | Automatic coupling intelligent ejector |
| CN113560295A (en) * | 2021-08-11 | 2021-10-29 | 厦门威迪思汽车设计服务有限公司 | Container cleaning device and cleaning method thereof |
| CN113898060A (en) * | 2021-12-09 | 2022-01-07 | 北京清源华建环境科技有限公司 | Regulation pond of function sprayer is washed to rain sewage deposit thing is equipped with |
| CN113914446A (en) * | 2021-10-27 | 2022-01-11 | 中建环能科技股份有限公司 | Hydraulic swing type jet flushing device |
| CN114029297A (en) * | 2021-10-28 | 2022-02-11 | 中建环能科技股份有限公司 | Movable multi-angle ejector |
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| CN102287206A (en) * | 2011-07-21 | 2011-12-21 | 湖南五新重型装备有限公司 | Wet spraying machine for concrete |
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| CN204170997U (en) * | 2014-09-10 | 2015-02-25 | 山东鲁能智能技术有限公司 | Transformer station's living water washing robot system |
| CN205710118U (en) * | 2016-04-15 | 2016-11-23 | 德国Hst智能排水技术有限公司 | Adjust poultry pond drift intelligent rotating aeration ejector |
| CN107574920A (en) * | 2017-09-30 | 2018-01-12 | 武汉圣禹排水系统有限公司 | Storm detention tank injecting type flusher, control method and storm detention tank |
| CN210529903U (en) * | 2019-05-28 | 2020-05-15 | 汉世德水务科技(上海)有限公司 | Three-dimensional intelligent rotary ejector for sludge in pump station or storage tank |
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| EP1661633A1 (en) * | 2004-11-26 | 2006-05-31 | Innovative Umwelttechnik GmbH | Jet cleaning device |
| CN102287206A (en) * | 2011-07-21 | 2011-12-21 | 湖南五新重型装备有限公司 | Wet spraying machine for concrete |
| CN103742169A (en) * | 2014-01-26 | 2014-04-23 | 中铁工程装备集团有限公司 | Tracked wet spraying machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492069A (en) * | 2021-07-22 | 2021-10-12 | 德诺尔流体设备（武汉）有限公司 | Automatic coupling intelligent ejector |
| CN113560295A (en) * | 2021-08-11 | 2021-10-29 | 厦门威迪思汽车设计服务有限公司 | Container cleaning device and cleaning method thereof |
| CN113914446A (en) * | 2021-10-27 | 2022-01-11 | 中建环能科技股份有限公司 | Hydraulic swing type jet flushing device |
| CN114029297A (en) * | 2021-10-28 | 2022-02-11 | 中建环能科技股份有限公司 | Movable multi-angle ejector |
| CN113898060A (en) * | 2021-12-09 | 2022-01-07 | 北京清源华建环境科技有限公司 | Regulation pond of function sprayer is washed to rain sewage deposit thing is equipped with |
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Application publication date: 20201201 |
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