CN111101591A - Spiral flow cleaning device and method for dirt resistance - Google Patents
Spiral flow cleaning device and method for dirt resistance Download PDFInfo
- Publication number
- CN111101591A CN111101591A CN202010054006.2A CN202010054006A CN111101591A CN 111101591 A CN111101591 A CN 111101591A CN 202010054006 A CN202010054006 A CN 202010054006A CN 111101591 A CN111101591 A CN 111101591A
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- water
- pipeline
- water inlet
- water outlet
- hard pipe
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- 238000004140 cleaning Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 157
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 239000010865 sewage Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 6
- 238000005202 decontamination Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 235000011121 sodium hydroxide Nutrition 0.000 abstract description 2
- 239000010813 municipal solid waste Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
- E03F9/007—Devices providing a flushing surge
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Cleaning In General (AREA)
- Sewage (AREA)
Abstract
The dirt resistance spiral flow cleaning device comprises a water collecting tank, a high-pressure injection pump, a water inlet hose, a water inlet hard pipe, a positioning block and a spiral flow water outlet nozzle, wherein a water inlet of the high-pressure injection pump is connected into the water collecting tank; two ends of the water inlet hose are respectively connected with a water outlet of the high-pressure injection pump and one end of the water inlet hard pipe; the water inlet hard pipe extends into the pipeline to be cleaned, and the end part of the water inlet hard pipe is connected with the spiral flow water outlet nozzle through a positioning block; the pipeline port department of should treating clearance is equipped with rubber locking mouth, the hard pipe that intakes passes this rubber locking mouth and stretches into in the pipeline of treating clearance. The invention has the advantages of energy saving, environmental protection, convenient control and simple operation, gets rid of the limitation of the traditional decontamination method (such as caustic soda dredging, dismounting and cleaning), and utilizes the novel flow making device to form high-speed and high-pressure spiral flow in the blocked sewer pipeline, thereby solving the blocking condition of the sewer pipeline.
Description
Technical Field
The invention discloses a device and a method for cleaning a sewage blockage spiral flow, relates to a cleaning method, in particular to cleaning and clearing when a sewer pipe is blocked, facilitates life and production of people, and belongs to the technical field of cleaning.
Background
With the continuous development of modern economy, sewer pipes are widely used in daily production and life of people for removing sundries, sewage and the like. The self-building house in the rural area is more attractive on the basis of wind and rain shielding, and a plurality of families can selectively bury hidden pipes. But when in use, the sewer pipeline is easy to be blocked, and the pipeline needs to be cleaned and dredged regularly. Cleaning becomes very difficult for sewer pipes that are difficult to remove, plus the replacement costs increase significantly if the sewer pipes are damaged. Currently, there are three main ways for such cleaning: one is to use mechanical vibration; one is a pipeline dredging agent, the pipeline dredging agent commonly used in the market is mainly corrosive chemical agents, and the main components of the pipeline dredging agent are strong corrosive chemical agents such as hydroxide, carbonate, sodium hypochlorite and the like; still another is a pipe fluffer that uses instantaneous high pressure to push the plug. These methods all suffer from problems of varying degrees: in the cleaning process, irreversible damage is caused to the pipeline; the pollution is generated to the whole pipeline and the ecological environment, and the difficulty of the subsequent sewage treatment is also increased; causing sloshing of sewage, etc. Therefore, the invention discloses a method for cleaning the spiral flow of the sewage blockage, which is an optimal scheme for collecting the blockage, dredging the pipeline and reducing the damage to the pipeline to the minimum.
Disclosure of Invention
The invention aims to provide a device and a method for cleaning a spiral flow of a dirt resistance, which are suitable for a novel efficient and environment-friendly method for cleaning and cleaning sewer pipes with different pipe diameters, and are simple to operate and convenient to use.
The technical scheme of the invention is as follows:
the invention provides a spiral flow cleaning device for a dirt resistance, which is characterized by comprising a water collecting tank, a high-pressure injection pump, a water inlet hose, a water inlet hard pipe, a positioning block and a spiral flow water outlet nozzle, wherein a water inlet of the high-pressure injection pump is connected into the water collecting tank; two ends of the water inlet hose are respectively connected with a water outlet of the high-pressure injection pump and one end of the water inlet hard pipe; the water inlet hard pipe extends into the pipeline to be cleaned, and the end part of the water inlet hard pipe is connected with the spiral flow water outlet nozzle through a flow guide block; the pipeline port department of should treating clearance is equipped with rubber locking mouth, the hard pipe that intakes passes this rubber locking mouth and stretches into in the pipeline of treating clearance.
Preferably, the device is further provided with a spiral conduit, a water injection pipeline is arranged in the positioning block, the end part of the water inlet hard pipe and the end part of the spiral conduit are respectively connected to two ends of the water injection pipeline in a sealing mode, and the spiral flow water injection nozzle is installed at the end part of the spiral conduit.
Preferably, the cross section of the positioning block is in a quarter-circle shape, the arc surface of the positioning block is in contact with the inner wall of the pipeline to be cleaned, and positioning springs are respectively arranged between the other two side surfaces and the inner wall of the pipeline to be cleaned.
Preferably, a positioning guide rail is arranged in the positioning spring, one end of the positioning guide rail is provided with a limiting table, the other end of the positioning guide rail is arranged in the positioning adjusting groove on the flow guide block in a sliding manner, and two ends of the positioning spring are respectively positioned between the limiting table corresponding to the positioning guide rail and the notch of the positioning adjusting groove.
Preferably, a heater is arranged in the water collecting tank.
Preferably, the device is further provided with a blocking object collecting mechanism, the blocking object collecting mechanism comprises a water outlet hard pipe and a water outlet hose, one end of the water outlet hard pipe is a bell mouth and is arranged in the pipeline to be cleaned, the other end of the water outlet hard pipe penetrates through the rubber locking port and then is connected with one end of the water outlet hose, and the other end of the water outlet hose is fixedly buckled in the water collecting tank by a round pipe.
Preferably, the rubber locking port is provided with anti-skidding fixing buckles at the joints of the water inlet hard pipe and the water outlet hard pipe respectively.
Preferably, a trash rack is arranged in the water collecting tank to divide the interior of the water collecting tank into a water inlet area and a water outlet area.
Preferably, the spiral conduit is formed by bending an aluminum pipe into a spiral shape or a hose wound with a steel wire into a spiral shape, so that the spiral conduit is convenient to shape.
The second purpose of the invention is to provide a method for cleaning the spiral flow of the sewage, which is characterized by comprising the following steps:
1) when the pipeline is blocked, the spiral flow water outlet nozzle is arranged at the end part of the spiral conduit, the other end of the spiral conduit is arranged at the bottom of the water injection pipeline of the positioning block, and the top of the water injection pipeline is provided with a water inlet hard pipe;
2) placing the water inlet hard pipe and the water outlet hard pipe in the pipeline to be cleaned, and enabling the spiral guide pipe to be tightly attached to the inner wall of the pipeline to be cleaned; the two positioning springs of the positioning block enable the arc-shaped surface of the positioning block to be tightly attached to the inner wall of the pipeline to be cleaned; rubber locking ports are buckled on the water inlet hard pipe and the water outlet hard pipe, and the water inlet hard pipe and the water outlet hard pipe are respectively fixed after the depth of the pipeline is controlled by an anti-skidding fixing buckle;
3) injecting water into the water collecting tank, and turning on a heater for heating; by using a high-pressure injection pump, water flows flow out through a spiral flow water outlet nozzle after flowing through a water inlet hose, a water inlet hard pipe, a water injection pipeline and a spiral conduit, spiral flow can be formed in a pipeline to be cleaned, and obstructions are stirred to dredge and clean the pipeline;
4) when some blockage is cleaned, the anti-skid fixing buckle can be opened, and the positioning block, the spiral conduit and the spiral flow water outlet nozzle move downwards by matching with the water inlet hard pipe, so that the gap in the blocked pipeline is reduced, and the strength of spiral flow is ensured;
5) the flushed blockage floats due to the blockage of the pipeline, and is collected by the water outlet hard pipe and collected into the water collecting tank through the water outlet hose.
The invention has four parts:
1. the first part is water injection equipment, a high-pressure injection pump is adopted, and water can be continuously injected into the pipeline, so that continuous water pressure can continuously impact the blockage in the pipeline wall;
2. the second part is an injection tube, a spiral conduit which is tightly attached to the wall of the tube, can be bent in different radians and can keep certain strength is adopted, and the spiral conduit can be adjusted to adapt to pipelines with different pipe diameters, and in the same pipe diameter pipeline, the water outlet nozzle can form different inclination angles by adjusting the spiral conduit;
different oil stains and particles can reach different cleaning effects at different inclination angles, and the inclination angles are generally between 45 and 75 degrees; when the cleaning effect is not obvious, the inclination angle is adjusted to achieve a better cleaning effect, and continuous high-speed high-pressure spiral flow can be efficiently generated;
3. the third part is a pipeline inner wall positioning block, small holes are reserved between the pipeline inner wall positioning block and the pipeline inner wall positioning block, so that an injection pipe penetrates through a pipeline to be cleaned to be injected with water, and the positioning block can move up and down in the pipeline to ensure the strength of spiral flow;
4. the fourth part is a water collecting tank which stores water and collects, filters and recycles the sewage which is cleaned out of the pipeline.
The invention has the advantages of energy saving, environmental protection, convenient control and simple operation, and particularly has the following advantages:
(1) the restriction of the traditional decontamination method (such as caustic soda dredging, dismounting and cleaning) is eliminated, and a novel flow making device is utilized to form high-speed and high-pressure spiral flow in the blocked sewer pipeline, so that the blocking condition of the sewer pipeline is solved;
(2) the pipeline can be dredged, and the blocking objects can be collected, so that the blocking objects can be cleaned, collected and recycled integrally, the secondary pollution of the cleaning work to the environment is reduced to the maximum extent, and the possibility of secondary blocking of the pipeline is reduced;
(3) the original pipeline cannot be physically damaged, chemical pollution cannot be generated, and the device can be flexibly used for multiple times;
(4) the pipe fitting is suitable for pipes with different diameters, and has strong adaptability and convenient disassembly and assembly.
Drawings
FIG. 1 is a cross-sectional view of a fouling spiral flow cleaning device;
FIG. 2 is a structural diagram of a positioning block in the fouling spiral flow cleaning device;
FIG. 3 is a schematic view of a spiral conduit in different forms in a pipe;
in the figure: 1-water inlet hose; 2-a heater; 3-high pressure syringe pump; 4-trash rack; 5, a water collecting tank; 6-fixing the round pipe; 7-antiskid fixing buckles; 8-water inlet hard pipe; 9-a water injection pipeline penetrating through the positioning block; 10-spiral flow water outlet nozzle; 11-a water outlet hose; 12-rubber locking port; 13-water outlet hard pipe; 14-a helical conduit; 15-positioning the guide rail; 16-positioning an adjusting groove; 17-water injection pipeline through hole; 18-a positioning block; 19-positioning spring.
Detailed Description
The fouling spiral flow cleaning device is respectively shown in figures 1 and 2.
FIG. 1 is a cross-sectional view of a fouling spiral flow cleaning device, when a pipeline is blocked, a spiral conduit 14, a positioning block 18, a water inlet hard pipe 8, a water outlet hard pipe 13 and the like which are tightly attached to the wall of the pipeline, can be bent in different radians and can keep certain strength are inserted into the pipeline to be cleaned; the rubber locking port 12 is buckled, and the pipeline is fixed after the depth is controlled by the antiskid fixing buckle 7.
Water is injected into the water collecting tank 5, the continuous heater 2 and the high-pressure injection pump 3 are started, water flows through the water inlet hose 1 between the high-pressure injection pump and the water inlet hard pipe, the water inlet hard pipe 8 and the water injection pipeline 9 are tightly attached to the spiral guide pipe 14 which is tightly attached to the pipe wall, can be bent in different radians and can keep certain strength, and then flows out through the spiral flow water outlet nozzle 10.
When the blockage is cleared away, the positioning block 18, the spiral conduit 14 and the spiral flow water outlet nozzle 10 can move downwards by matching with the water inlet hard pipe 8, so that the gap in the blocked pipeline is reduced, and the strength of the spiral flow is ensured.
Because the sewer pipe is blocked, the flushed blockage floats, and is collected in the water collecting tank 5 through the water outlet hose 11 connecting the water outlet hard pipe and the water collecting tank after being collected by the water outlet hard pipe 13 (after water is continuously injected into the sewer pipe, if the pipe is not communicated, the blockage can be discharged from the water outlet hard pipe, and if the pipe is communicated, the blockage is discharged into the sewer pipe) so as to prevent secondary blockage, wherein the water outlet hose 11 connecting the water outlet hard pipe and the water collecting tank is fixed in the water collecting tank 5 through the round pipe fixing buckle 6, and the sewage is prevented from splashing. The sewage entering the water collecting tank passes through the trash screen 4, solid garbage is filtered, and the sewage enters the left side of the water collecting tank 5 and is secondarily utilized.
In fig. 2, the positioning spring 19 adds rigidity and stability to the positioning rail 15 (the positioning rail may be a metal rod with certain hardness), so that it can support the positioning block 18 to be arranged in the pipeline. The positioning adjusting groove 16 is reserved to adapt to pipelines with different pipe diameters.
Figure 3 shows a schematic representation of a different form of spiral conduit in a pipe. The spiral pipe 14 which is attached to the pipe wall, can be bent in different radians and can maintain certain strength can be adjusted to adapt to different pipe diameters, and the spiral water outlet nozzle 10 can form different inclination angles.
Claims (10)
1. The spiral flow cleaning device for the sewage resistance is characterized by comprising a water collecting tank, a high-pressure injection pump, a water inlet hose, a water inlet hard pipe, a positioning block and a spiral flow water outlet nozzle, wherein a water inlet of the high-pressure injection pump is connected into the water collecting tank; two ends of the water inlet hose are respectively connected with a water outlet of the high-pressure injection pump and one end of the water inlet hard pipe; the water inlet hard pipe extends into the pipeline to be cleaned, and the end part of the water inlet hard pipe is connected with the spiral flow water outlet nozzle through a positioning block; the pipeline port department of should treating clearance is equipped with rubber locking mouth, the hard pipe that intakes passes this rubber locking mouth and stretches into in the pipeline of treating clearance.
2. The spiral sewage flow cleaning device according to claim 1, further comprising a spiral conduit, wherein a water injection pipeline is arranged in the positioning block, the end of the water inlet hard pipe and the end of the spiral conduit are respectively connected to two ends of the water injection pipeline in a sealing manner, and the spiral flow water outlet nozzle is mounted at the end of the spiral conduit.
3. The spiral flow cleaning device for sewage blockage according to claim 2, wherein the cross section of the positioning block is in a quarter-circle shape, the arc-shaped surface of the positioning block is contacted with the inner wall of the pipeline to be cleaned, and positioning springs are respectively arranged between the other two side surfaces and the inner wall of the pipeline to be cleaned.
4. A spiral flow cleaning device for sewage resistance according to claim 3, wherein a positioning guide rail is arranged in the positioning spring, one end of the positioning guide rail is provided with a limit table, the other end of the positioning guide rail is slidably arranged in the positioning adjusting groove on the positioning block, and two ends of the positioning spring are respectively positioned between the limit table of the corresponding positioning guide rail and the notch of the positioning adjusting groove.
5. A spiral flow cleaning apparatus according to claim 1, wherein a heater is provided in the water collection tank.
6. The spiral flow dirt-blocking cleaner as recited in claim 1, further comprising a blocking material collecting mechanism, said blocking material collecting mechanism comprises a water outlet pipe and a water outlet hose, one end of said water outlet pipe is a bell mouth, said pipe is placed in the pipe to be cleaned, the other end of said water outlet pipe passes through the rubber locking port and is connected with one end of said water outlet hose, and the other end of said water outlet hose is fixed in the water collecting tank by means of a circular tube fixing fastener.
7. The spiral flow cleaning device for the sewage resistance, as claimed in claim 6, wherein the rubber locking port is provided with an anti-slip fastener at the connection with the water inlet hard pipe and the water outlet hard pipe.
8. The spiral flow dirt-blocking cleaning device as claimed in claim 6, wherein a dirt blocking net is arranged in the water collecting tank to separate the water collecting tank into a water inlet area and a water outlet area.
9. A spiral sewage disposal apparatus as claimed in claim 2, wherein said spiral duct is formed by spirally bending an aluminum pipe or a flexible pipe wound with a steel wire.
10. The method for cleaning the spiral flow of the dirt resistance is characterized by comprising the following steps of:
1) when the pipeline is blocked, the spiral flow water outlet nozzle is arranged at the end part of the spiral conduit, the other end of the spiral conduit is arranged at the bottom of the water injection pipeline of the positioning block, and the top of the water injection pipeline is provided with a water inlet hard pipe;
2) placing the water inlet hard pipe and the water outlet hard pipe in the pipeline to be cleaned, and enabling the spiral guide pipe to be tightly attached to the inner wall of the pipeline to be cleaned; the two positioning springs of the positioning block enable the arc-shaped surface of the positioning block to be tightly attached to the inner wall of the pipeline to be cleaned; rubber locking ports are buckled on the water inlet hard pipe and the water outlet hard pipe, and the water inlet hard pipe and the water outlet hard pipe are respectively fixed after the depth of the pipeline is controlled by an anti-skidding fixing buckle;
3) injecting water into the water collecting tank, and turning on a heater for heating; by using a high-pressure injection pump, water flows flow out through a spiral flow water outlet nozzle after flowing through a water inlet hose, a water inlet hard pipe, a water injection pipeline and a spiral conduit, spiral flow can be formed in a pipeline to be cleaned, and obstructions are stirred to dredge and clean the pipeline;
4) when some blockage is cleaned, the anti-skid fixing buckle can be opened, and the flow guide block, the spiral conduit and the spiral flow water outlet nozzle move downwards by matching with the water inlet hard pipe, so that the gap in the blocked pipeline is reduced, and the strength of spiral flow is ensured;
5) the flushed blockage floats due to the blockage of the pipeline, and is collected by the water outlet hard pipe and collected into the water collecting tank through the water outlet hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054006.2A CN111101591A (en) | 2020-01-17 | 2020-01-17 | Spiral flow cleaning device and method for dirt resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054006.2A CN111101591A (en) | 2020-01-17 | 2020-01-17 | Spiral flow cleaning device and method for dirt resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111101591A true CN111101591A (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010054006.2A Pending CN111101591A (en) | 2020-01-17 | 2020-01-17 | Spiral flow cleaning device and method for dirt resistance |
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| Country | Link |
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| CN (1) | CN111101591A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761242A (en) * | 2020-12-25 | 2021-05-07 | 安徽合宇天成建设工程有限公司 | Engineering environmental protection desilting equipment of municipal administration pipeline |
| CN112982589A (en) * | 2021-02-03 | 2021-06-18 | 南京安居防护科技有限公司 | Wireless intelligent monitoring equipment management system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687011A (en) * | 1984-09-28 | 1987-08-18 | Uraki Masaru | Rotary cleaning device for drain pipe and the like |
| KR20160048404A (en) * | 2014-10-24 | 2016-05-04 | 이상구 | Pipe Cleaning Equipment Using Injection Nozzle |
| CN107489195A (en) * | 2017-09-01 | 2017-12-19 | 上海市水利工程设计研究院有限公司 | A kind of drainage pipeline desilting integrated apparatus based on high-pressure rotary jet |
| CN211922949U (en) * | 2020-01-17 | 2020-11-13 | 扬州大学 | Dirt hinders spiral flow cleaning device |
-
2020
- 2020-01-17 CN CN202010054006.2A patent/CN111101591A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687011A (en) * | 1984-09-28 | 1987-08-18 | Uraki Masaru | Rotary cleaning device for drain pipe and the like |
| KR20160048404A (en) * | 2014-10-24 | 2016-05-04 | 이상구 | Pipe Cleaning Equipment Using Injection Nozzle |
| CN107489195A (en) * | 2017-09-01 | 2017-12-19 | 上海市水利工程设计研究院有限公司 | A kind of drainage pipeline desilting integrated apparatus based on high-pressure rotary jet |
| CN211922949U (en) * | 2020-01-17 | 2020-11-13 | 扬州大学 | Dirt hinders spiral flow cleaning device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761242A (en) * | 2020-12-25 | 2021-05-07 | 安徽合宇天成建设工程有限公司 | Engineering environmental protection desilting equipment of municipal administration pipeline |
| CN112982589A (en) * | 2021-02-03 | 2021-06-18 | 南京安居防护科技有限公司 | Wireless intelligent monitoring equipment management system |
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