CN113482141A - Automatic flushing system of drainage box culvert - Google Patents
Automatic flushing system of drainage box culvert Download PDFInfo
- Publication number
- CN113482141A CN113482141A CN202110724263.7A CN202110724263A CN113482141A CN 113482141 A CN113482141 A CN 113482141A CN 202110724263 A CN202110724263 A CN 202110724263A CN 113482141 A CN113482141 A CN 113482141A
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- Prior art keywords
- box culvert
- drainage box
- drainage
- water
- area
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000007921 spray Substances 0.000 claims abstract description 27
- 238000005406 washing Methods 0.000 claims abstract description 27
- 238000005192 partition Methods 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000012212 insulator Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
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- 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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses an automatic flushing system for a drainage box culvert, which comprises the drainage box culvert, a flushing trolley and a power supply rail, wherein the flushing trolley is arranged on the drainage box culvert; the upper part in the drainage box culvert is a travelling crane area and is provided with a horizontal plate, the lower part is divided into a drainage area and a water storage area through a longitudinal wall, and the water storage area is divided into sections through transverse partition walls; the washing trolley comprises an electric trolley which is used for walking along a horizontal plate in a driving area, a pressure pump and a camera are arranged on the electric trolley, a water inlet pipe of the pressure pump is connected to a water suction hose, a water outlet pipe of the pressure pump is connected to a spray head, the water suction hose naturally falls into a water storage area, the spray head points to the bottom surface of a water drainage area, and the camera is matched with a spotlight and is used for respectively observing the bottom surface condition of the water drainage area and the lower form of the water suction hose; the power supply rail is arranged in the traveling area and is used for supplying power to the traveling motor, the pressure pump, the camera and the spotlight of the electric trolley. The system can be used for carrying out full-line washing on the drainage box culvert, the drainage box culvert does not need to be manually entered, the operation is safe, the strength is low, the water supply and the power supply are guaranteed during washing, and the cleaning effect is good.
Description
Technical Field
The invention belongs to the field of municipal drainage, and particularly relates to an automatic flushing system for a drainage box culvert.
Background
Drainage box culvert wide application in municipal drainage field, through the use of year after year, most drainage box culvert bottoms all can the siltation have the unequal silt of thickness, especially in some areas that do not realize rain sewage reposition of redundant personnel drainage system completely, have sewage discharge year after year in the drainage box culvert, and often have a large amount of solid deposit sediment inside the box culvert in the sewage.
For the sludge in the drainage box culvert, as a regular cleaning mechanism is not formed, the sludge can be gradually hardened and hardened, and the washing difficulty is increased. In addition, due to the lack of mature and effective washing equipment, the conventional washing mode still mainly adopts manual washing and is assisted by simple equipment, a large amount of manual work is needed, the environmental conditions in the structure are very severe, and the personal safety of operators is greatly threatened.
Disclosure of Invention
The invention aims to provide an automatic flushing system for a drainage box culvert, which can perform full-line flushing on the drainage box culvert, does not need manual work to enter the drainage box culvert, is safe to operate, low in strength, guaranteed in water and power supply during flushing and good in cleaning effect.
The technical scheme adopted by the invention is as follows:
an automatic flushing system for a drainage box culvert comprises the drainage box culvert, a flushing trolley and a power supply rail; the upper part in the drainage box culvert is a travelling crane area and is provided with a horizontal plate, the lower part is divided into a drainage area and a water storage area through a longitudinal wall, and the water storage area is divided into sections through transverse partition walls; the washing trolley comprises an electric trolley which is used for walking along a horizontal plate in a driving area, a pressure pump and a camera are arranged on the electric trolley, a water inlet pipe of the pressure pump is connected to a water suction hose, a water outlet pipe of the pressure pump is connected to a spray head, the water suction hose naturally falls into a water storage area, the spray head points to the bottom surface of a water drainage area, and the camera is matched with a spotlight and is used for respectively observing the bottom surface condition of the water drainage area and the lower form of the water suction hose; the power supply rail is arranged in the traveling area and is used for supplying power to the traveling motor, the pressure pump, the camera and the spotlight of the electric trolley.
Preferably, the outlet pipe is connected with a plurality of nozzles, each nozzle can spray fan-shaped jet flow and forms 45 degrees with the bottom surface of the drainage area in the vertical direction.
Furthermore, the water outlet pipe is connected with three spray heads, the three spray heads are arranged in equal height along the trend of the drainage box culvert and are close to the longitudinal wall, the spray head at the most upstream is 45 degrees away from the longitudinal wall along the trend of the drainage box culvert, the spray head at the middle is 22.5 degrees away from the longitudinal wall along the trend of the drainage box culvert, and the spray head at the most downstream is parallel to the trend of the drainage box culvert.
Preferably, the electric trolley is provided with limiting pulleys, and the limiting pulleys are distributed on two sides of the drainage box culvert and are in rolling contact with the side walls of the two sides respectively.
Preferably, the vehicle body of the electric trolley is fixedly connected with an auxiliary frame, the vehicle body runs on the horizontal plate, the auxiliary frame stretches across the upper part of the drainage area and is supported on the top surface of the longitudinal wall in a rolling manner through a supporting pulley, the pressure pump and the running motor are installed on the vehicle body, and the water inlet pipe, the water outlet pipe, the camera and the spotlight are installed on the auxiliary frame.
Furthermore, the water inlet pipe and the water outlet pipe are stably installed on the auxiliary frame through the support along the line.
Preferably, the power supply rail comprises a protective cover arranged on the inner wall of the drainage box culvert, a contact rail arranged in the protective cover through an insulator and a current collection mechanism arranged on the electric trolley, and the current collection mechanism extends into the protective cover to be in contact with the contact rail.
Preferably, the longitudinal slope of the drainage box culvert is 0.005, the clear width of the drainage area is 3.0m, the clear width of the water storage area is 0.4m, the distance between the bottom of the horizontal plate and the inner bottom wall of the drainage box culvert is 3.0m, the distance between the top of the horizontal plate and the inner top wall of the drainage box culvert is 1.5m, the width of the horizontal plate is 1.5m, the length of each section of the water storage area is 200m, the height of the cross partition wall is 1.4m, and the distance between the opening of the water suction hose and the inner bottom wall of the drainage box culvert is 0.2m in a natural state.
Preferably, during work, the walking trolley walks at a constant speedThe speed is 0-10 km/h, and the flow rate of the pressurizing pump is 240m3H and a lift of 0.50 MPa.
Preferably, the camera is capable of remote angle adjustment.
The invention has the beneficial effects that:
the system can be used for carrying out full-line washing on the drainage box culvert, the drainage box culvert does not need to be manually entered, the operation is safe, the strength is low, the water supply and the power supply are guaranteed during washing, and the cleaning effect is good.
Drawings
Fig. 1 is a schematic structural diagram of an automatic flushing system of a drainage box culvert in the embodiment of the invention.
FIG. 2 is a schematic structural diagram of a drainage box culvert in an embodiment of the invention.
FIG. 3 is a first schematic structural view of a washing cart according to an embodiment of the present invention.
FIG. 4 is a second schematic structural view of a washing cart in an embodiment of the present invention.
FIG. 5 is a third schematic structural view of a flushing trolley in an embodiment of the invention.
Fig. 6 is a schematic diagram of the operation of the power supply rail in the embodiment of the present invention.
In the figure:
1. draining box culverts; 1-1. a drainage area; 1-2, a driving area; 1-3. a water storage area; 1-4. horizontal plate; 1-5, longitudinal walls; 1-6. transverse partition wall.
2. Washing the trolley; 2-1, an electric trolley; 2-2, a booster pump; 2-3, a walking motor; 2-4, water inlet pipe; 2-5. a water absorbing hose; 2-6, discharging the water pipe; 2-7, a spray head; 2-8, auxiliary frame; 2-9. a support; 2-10, a limiting pulley; 2-11. a camera; and 2-12, supporting the pulley.
3. A power supply rail; 3-1. protective cover; 3-2. an insulator; 3-3. contact rail; and 3-4, a current collecting mechanism.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 to 6, an automatic flushing system for a drainage box culvert comprises a drainage box culvert 1, a flushing trolley 2 and a power supply rail 3; the upper part in the drainage box culvert 1 is a travelling area 1-2 and is provided with horizontal plates 1-4, the lower part is divided into a drainage area 1-1 and a water storage area 1-3 through longitudinal walls 1-5, and the water storage area 1-3 is divided into sections through transverse partition walls 1-6; the washing trolley 2 comprises an electric trolley 2-1 which is used for walking along a horizontal plate 1-4 in a driving area 1-2, a pressure pump 2-2 and a camera 2-11 are arranged on the electric trolley 2-1, a water inlet pipe 2-4 of the pressure pump 2-2 is connected to a water suction hose 2-5, a water outlet pipe 2-6 is connected to a spray head 2-7, the water suction hose 2-5 naturally falls into a water storage area 1-3, the spray head 2-7 points to the bottom surface of a water drainage area 1-1, and the camera 2-11 is matched with a spot light and is used for respectively observing the bottom surface condition of the water drainage area 1-1 and the lower form of the water suction hose 2-5; the power supply rail 3 is arranged in the traveling area 1-2 and is used for supplying power to the traveling motor 2-3, the pressure pump 2-2, the camera 2-11 and the spotlight of the electric trolley 2-1.
As shown in fig. 3 and 5, in the present embodiment, the water outlet pipe 2-6 is connected with a plurality of nozzles 2-7, each nozzle 2-7 can spray fan-shaped jet flow and is vertically 45 ° to the bottom surface of the drainage area 1-1, and the arrangement ensures the flushing effect. In the embodiment, the water outlet pipe 2-6 is connected with three spray heads 2-7, the three spray heads 2-7 are arranged at the same height along the direction of the drainage box culvert 1 and are close to the longitudinal walls 1-5, the spray head 2-7 at the most upstream is 45 degrees away from the direction of the drainage box culvert 1 and is deviated from the longitudinal walls 1-5, the spray head 2-7 at the middle is 22.5 degrees away from the direction of the drainage box culvert 1 and is deviated from the longitudinal walls 1-5, and the spray head 2-7 at the most downstream is parallel to the direction of the drainage box culvert 1.
As shown in fig. 3 to 5, in this embodiment, the electric trolley 2-1 is provided with limiting pulleys 2-10, the limiting pulleys 2-10 are distributed on two sides of the drainage box culvert 1 and are in rolling contact with the side walls of the two sides respectively, and the limiting pulleys 2-10 can ensure that the electric trolley 2-1 does not laterally shift.
As shown in fig. 3 to 5, in the embodiment, an auxiliary frame 2-8 is fixedly connected to a body of an electric trolley 2-1, the body runs on a horizontal plate 1-4, the auxiliary frame 2-8 spans over a drainage area 1-1 and is supported on the top surface of a longitudinal wall 1-5 in a rolling manner through a support pulley 2-12, a pressure pump 2-2 and a running motor 2-3 are installed on the body, and a water inlet pipe 2-4, a water outlet pipe 2-6, a camera 2-11 and a spotlight are installed on the auxiliary frame 2-8. The auxiliary frame 2-8 can improve the overall stability of the electric trolley 2-1 during walking, and avoids the suspended installation of the water inlet pipe 2-4, the water outlet pipe 2-6, the camera 2-11 and the spotlight.
As shown in fig. 3 to 5, in the present embodiment, the inlet pipe 2-4 and the outlet pipe 2-6 are stably mounted on the auxiliary frames 2-8 by means of the supports 2-9 along the line. The water inlet pipe 2-4 and the water outlet pipe 2-6 are greatly impacted by fluid, and the support 2-9 is arranged along the line, so that the stability is improved.
As shown in FIG. 6, in the present embodiment, the power supply rail 3 comprises a protective cover 3-1 installed on the inner wall of the drainage box culvert 1, a contact rail 3-3 installed in the protective cover 3-1 through an insulator 3-2, and a current collecting mechanism 3-4 installed on the electric trolley 2-1, wherein the current collecting mechanism 3-4 extends into the protective cover 3-1 to be in contact with the contact rail 3-3. The power supply rail 3 is a mature mechanism and is installed conventionally.
The two cameras 2-11 are used for effectively observing respective target conditions at a good angle, but the angle can be preferably adjusted remotely, so that other target conditions can be checked in a sequential manner.
With respect to specific dimensions and operating parameters, the following are examples:
the longitudinal slope of the drainage box culvert 1 is 0.005, the clear width of the drainage area 1-1 is 3.0m, the clear width of the water storage area 1-3 is 0.4m, the distance between the bottom of the horizontal plate 1-4 and the inner bottom wall of the drainage box culvert 1 is 3.0m, the distance between the top of the horizontal plate 1-4 and the inner top wall of the drainage box culvert 1 is 1.5m, the width of the horizontal plate 1-4 is 1.5m, the length of each section of the water storage area 1-3 is 200m, the height of the transverse partition wall 1-6 is 1.4m, and the distance between the pipe orifice of the water suction hose 2-5 and the inner bottom wall of the drainage box culvert 1 is 0.2m in a natural state;
when the pressure booster pump works, the walking trolley 2-1 walks at a constant speed, the walking speed is 0-10 km/h, and the flow rate of the pressure booster pump 2-2 is 240m3H, the lift is 0.50 MPa;
the water inlet pipe 2-4 and the water outlet pipe 2-6 are both made of stainless steel pipes, the water absorbing hose 2-5 is made of rubber pipes, the pipe diameters of the water inlet pipe 2-4, the water outlet pipe 2-6 and the water absorbing hose 2-5 are DN200, the tail section of the water outlet pipe 2-6 is horizontal and is plugged by a flange plate, the distance from the tail section of the water outlet pipe 2-6 to the longitudinal wall 1-5 is 0.3m and is higher than the top of the horizontal plate 1-4 by 0.6m, the length of the tail section of the water outlet pipe 2-6 is 2.0m, the spray head 2-7 is arranged on the lower side of the tail section of the water outlet pipe 2-7 along the line through an interface with the pipe diameter of DN80, and the spray nozzle 2-7 is higher than the top of the horizontal plate 1-4 by 0.2 m.
When in work, the washing steps are as follows:
s1, before flushing, injecting clear water into the uppermost stream of the water storage area 1-3, and after filling the water storage area 1-3, the clear water overflows the transverse partition wall 1-6 to the next water storage area 1-3 until the water storage area 1-3 is fully filled;
s2, the power supply rail 3 starts to be electrified, the washing trolley 2 is controlled to move to the most upstream of the drainage box culvert 1, outdoor personnel monitor the lower form of the water suction hose 2-5 in real time through the camera 2-11, and the water suction hose 2-5 is ensured to naturally fall below the liquid level of the water storage area 1-3;
s3, the pressure pump 2-2 and the walking motor 2-3 are started simultaneously, the walking motor 2-3 drives the washing trolley 2 to advance, the pressure pump 2-2 pumps in clean water in the water storage area 1-3 through the water suction hose 2-5 and the water inlet pipe 2-4, the clean water is pressurized and then is conveyed to the spray head 2-7 through the water outlet pipe 2-6 to be sprayed out, the washing trolley 2 washes the sludge on the bottom surface of the water drainage area 1-1 while advancing, outdoor personnel monitor the washing effect of the bottom surface of the water drainage area 1-1 in real time through the camera 2-11, and the moving speed of the washing trolley 2 is adjusted remotely according to the washing condition;
s4, moving the washing trolley 2 downstream, monitoring the lower form of the water suction hose 2-5 in real time by outdoor personnel through a camera 2-11, closing the pressure pump 2-2 when the water suction hose 2-5 passes through the diaphragm wall 1-6, and continuously controlling the washing trolley 2 to move downstream;
s5, outdoor personnel monitor the lower form of the water suction hose 2-5 in real time through the camera 2-11, when the water suction hose 2-5 crosses the diaphragm wall 1-6 and enters the next section of water storage area 1-3 and the water suction hose 2-5 naturally falls below the liquid level of the water storage area 1-3, the flushing trolley 2 is controlled to move reversely until the water suction hose 2-5 returns to the position of the diaphragm wall 1-6, the flushing trolley 2 is controlled to stop moving, and then the step S3 is repeated;
s6, according to the steps S3 to S5, the whole line flushing of the drainage area 1-1 is completed.
The system can be used for carrying out full-line washing on the drainage box culvert 1, the manual operation is not needed to enter the drainage box culvert 1, the operation is safe, the strength is low, the water supply and the power supply are guaranteed during washing, and the cleaning effect is good.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an automatic rinse-system of drainage box culvert which characterized in that: comprises a drainage box culvert, a washing trolley and a power supply rail; the upper part in the drainage box culvert is a travelling crane area and is provided with a horizontal plate, the lower part is divided into a drainage area and a water storage area through a longitudinal wall, and the water storage area is divided into sections through transverse partition walls; the washing trolley comprises an electric trolley which is used for walking along a horizontal plate in a driving area, a pressure pump and a camera are arranged on the electric trolley, a water inlet pipe of the pressure pump is connected to a water suction hose, a water outlet pipe of the pressure pump is connected to a spray head, the water suction hose naturally falls into a water storage area, the spray head points to the bottom surface of a water drainage area, and the camera is matched with a spotlight and is used for respectively observing the bottom surface condition of the water drainage area and the lower form of the water suction hose; the power supply rail is arranged in the traveling area and is used for supplying power to the traveling motor, the pressure pump, the camera and the spotlight of the electric trolley.
2. The drainage box culvert automatic flushing system of claim 1, characterized in that: the outlet pipe is connected with a plurality of spray heads, and each spray head can spray fan-shaped jet flow and forms 45 degrees with the bottom surface of the drainage area in the vertical direction.
3. The drainage box culvert automatic flushing system of claim 2, characterized in that: the water outlet pipe is connected with three nozzles, the three nozzles are arranged at the same height along the trend of the drainage box culvert and are close to the longitudinal wall, the nozzle at the most upstream is 45 degrees away from the longitudinal wall with the trend of the drainage box culvert, the nozzle at the middle is 22.5 degrees away from the longitudinal wall with the trend of the drainage box culvert, and the nozzle at the most downstream is parallel to the trend of the drainage box culvert.
4. The drainage box culvert automatic flushing system of claim 1, characterized in that: the electric trolley is provided with limiting pulleys, and the limiting pulleys are distributed on two sides of the drainage box culvert and are in rolling contact with the side walls of the two sides respectively.
5. The drainage box culvert automatic flushing system of claim 1, characterized in that: the automobile body of electronic dolly links firmly the auxiliary frame, and the automobile body walking is on the horizontal plate, and the auxiliary frame spanes in the drainage area top and rolls through supporting pulley and support at vertical wall top surface, and force (forcing) pump and walking motor are installed on the automobile body, and inlet tube, outlet pipe, camera and shot-light are installed on the auxiliary frame.
6. The drainage box culvert automatic flushing system of claim 1, characterized in that: the water inlet pipe and the water outlet pipe are stably arranged on the auxiliary frame through the support along the line.
7. The drainage box culvert automatic flushing system of claim 1, characterized in that: the power supply rail comprises a protective cover arranged on the inner wall of the drainage box culvert, a contact rail arranged in the protective cover through an insulator and a current collection mechanism arranged on the electric trolley, wherein the current collection mechanism stretches into the protective cover to be contacted with the contact rail.
8. The drainage box culvert automatic flushing system of claim 1, characterized in that: the drainage box culvert longitudinal slope is 0.005, the clear width of drainage district 3.0m, the clear width of water storage area 0.4m, the diapire 3.0m in the horizontal plate bottom apart from the drainage box culvert, the roof 1.5m in the horizontal plate top apart from the drainage box culvert, horizontal plate width 1.5m, every section length of water storage area 200m, the diaphragm wall height 1.4m, the hose mouth of pipe that absorbs water under the natural state is apart from the diapire 0.2m in the drainage box culvert.
9. The drainage box culvert automatic flushing system of claim 1, characterized in that: when the pressure booster pump works, the walking trolley walks at a constant speed, the walking speed is 0-10 km/h, and the flow rate of the pressure booster pump is 240m3H and a lift of 0.50 MPa.
10. The drainage box culvert automatic flushing system of claim 1, characterized in that: the camera can long-range angle regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110724263.7A CN113482141A (en) | 2021-06-29 | 2021-06-29 | Automatic flushing system of drainage box culvert |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110724263.7A CN113482141A (en) | 2021-06-29 | 2021-06-29 | Automatic flushing system of drainage box culvert |
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| CN113482141A true CN113482141A (en) | 2021-10-08 |
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| CN202110724263.7A Pending CN113482141A (en) | 2021-06-29 | 2021-06-29 | Automatic flushing system of drainage box culvert |
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| CN210023142U (en) * | 2019-01-22 | 2020-02-07 | 南京联众工程技术有限公司 | Structure for preventing water accumulation in drainage box culvert or pool |
| CN210086461U (en) * | 2019-04-11 | 2020-02-18 | 武汉市市政建设集团有限公司 | A automatic water conservancy washing unit for rainwater regulation pond |
| CN210562577U (en) * | 2019-09-06 | 2020-05-19 | 中铁二院工程集团有限责任公司 | Deep tunnel drainage system flushing device |
| CN212176031U (en) * | 2020-01-07 | 2020-12-18 | 泉州市信长机械科技有限公司 | Municipal administration pipeline desilting equipment |
| CN111119327A (en) * | 2020-03-17 | 2020-05-08 | 中冶建工集团有限公司 | Pipe culvert dredging and pollution discharge method |
| CN112482551A (en) * | 2020-11-23 | 2021-03-12 | 长安大学 | Movable culvert cleaning device and cleaning method |
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