CN113718848B - Hydraulic engineering retaining wall drainage structures - Google Patents
Hydraulic engineering retaining wall drainage structures Download PDFInfo
- Publication number
- CN113718848B CN113718848B CN202111176704.0A CN202111176704A CN113718848B CN 113718848 B CN113718848 B CN 113718848B CN 202111176704 A CN202111176704 A CN 202111176704A CN 113718848 B CN113718848 B CN 113718848B
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- shell
- wall
- spray head
- retaining wall
- drainage
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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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
Abstract
The invention provides a drainage structure of a retaining wall of a hydraulic engineering, belonging to the technical field of drainage of the retaining wall, and comprising a shell, a spray head, a first pipeline and a rotating mechanism; the shell is suitable for being arranged on the top wall of the drainage channel, and the lower surface of the shell is provided with air holes; one end of the spray head is communicated with the air hole, and the other end of the spray head is a bent end; the spray head has the freedom degree of rotating around the axis of the air hole, and the bent end faces the bottom wall of the drainage channel; the first conduit has a first end adapted to extend out of the top wall of the retaining wall and a second end in communication with the side wall of the housing; the first end is suitable for being communicated with a gas source; the rotating mechanism is arranged on the lower surface of the shell and is provided with a rotating driving end connected with the outer wall surface of the spray head, and the rotating driving end is suitable for driving the spray head to rotate around the axial direction of the air holes; compared with the prior art, through the cooperation of casing, shower nozzle, first pipeline and rotary mechanism, can clear up the silt in the drainage channel, be convenient for improve the drainage effect of retaining wall.
Description
Technical Field
The invention belongs to the technical field of retaining wall drainage, and particularly relates to a retaining wall drainage structure for hydraulic engineering.
Background
The retaining wall is a structure for supporting roadbed filling soil or hillside soil and preventing the filling soil or the soil from deforming and destabilizing; when hydraulic engineering retaining wall construction, the retaining wall is prefabricated concrete structure, in order to improve drainage effect, can be equipped with a plurality of wash ports on the wall of the slope of retaining wall, and the inside of retaining wall sets up drainage channel, drainage channel and wash port intercommunication, drainage channel's bottom and the wall of retaining wall are close to the position intercommunication of bottom, consequently, the water that falls into on the retaining wall can be followed wash port and drainage channel and is passed through, be convenient for improve the drainage performance of retaining wall.
However, in the water conservancy construction process, there is long-pending soil on the wall of retaining wall, and when water on the retaining wall entered into the drainage hole, the long-pending soil on the wall can be carried, consequently, can make drainage channel block up, influences drainage effect.
Disclosure of Invention
The embodiment of the invention provides a drainage structure of a retaining wall in a hydraulic engineering, and aims to solve the technical problem of poor drainage effect after a drainage pipeline in the retaining wall is blocked.
In order to realize the purpose, the invention adopts the technical scheme that:
there is provided a hydraulic engineering retaining wall drainage structure, comprising:
the shell is suitable for being arranged on the top wall of the drainage channel, and the lower surface of the shell is provided with air holes;
one end of the spray head is communicated with the air vent, and the other end of the spray head is a bent end; the spray head has the freedom degree of rotating around the axis of the air hole, and the bent end faces the bottom wall of the drainage channel;
a first conduit having a first end adapted to extend out of the top wall of the retaining wall and a second end in communication with the side wall of the housing; the first end is adapted to communicate with a gas source; and
the rotating mechanism is arranged on the lower surface of the shell and is provided with a rotating driving end connected with the outer wall surface of the spray head, and the rotating driving end is suitable for driving the spray head to rotate around the axis direction of the air holes.
In a possible implementation manner, the rotating mechanism includes a second pipeline and a plurality of fan blades, and the fan blades are distributed along the circumferential direction of the nozzle and are all fixed on the outer wall surface of the nozzle;
the second pipeline is provided with an output end and an input end communicated with the first pipeline or the shell; the output end of the second pipeline faces the fan blades, so that the fan blades rotate under the action of air flow.
In one possible implementation, the rotating mechanism further includes a housing box fixed to a lower surface of the housing; the fan blades are positioned in the inner cavity of the accommodating box, and the output end of the second pipeline is communicated with the side wall of the accommodating box;
the accommodating box is provided with a through hole suitable for the spray head to penetrate out, and the lower surface of the accommodating box is provided with an air outlet facing the bottom wall of the drainage channel.
In one possible implementation, the upper surface and the lower surface of the fan blade are respectively in contact with the upper surface and the lower surface of the inner cavity of the containing box;
the upper surface and the lower surface of flabellum all are equipped with a plurality of recesses, be equipped with the ball in the recess, the flabellum passes through the ball with hold box normal running fit.
In a possible implementation, the housing has an opening adapted to face the drain hole, the opening and the second end of the first duct being located on opposite sides of the housing, respectively;
the drainage structure also comprises a sealing plate and a sliding part, and the sliding part is suitable for being arranged in the opening of the shell in a sliding mode; the sealing plate is connected with the outer side end of the sliding part and closes or opens the drain hole under the sliding action of the sliding part; the sliding piece is suitable for closing or opening the air holes;
after the sliding piece slides outwards under the action of pressure gas, the sealing plate seals the drain hole, and the air hole is opened by the sliding piece.
In a possible implementation manner, the sliding part comprises a telescopic rod and a piston, the outer peripheral wall of the piston is in sealing connection with the inner cavity peripheral wall of the shell, and one end of the telescopic rod penetrates through the opening of the shell and is connected with the piston.
In a possible implementation manner, an elastic member is arranged in the shell, one end of the elastic member is connected with the piston, and the other end of the elastic member is connected with the inner wall of the shell; the elastic piece is used for providing elastic force for the piston so as to enable the telescopic rod to retract into the shell.
In one possible implementation manner, the rotating mechanism comprises a frame body, a first gear, a second gear and a driving motor, wherein the frame body is fixed on the lower surface of the shell;
the first gear is fixed on the peripheral wall of the spray head, and the second gear is meshed with the first gear; the driving motor is fixed on the frame body, and the output end of the driving motor is connected with the second gear;
the frame body is provided with a limiting part which is suitable for axially limiting the spray head.
In a possible implementation manner, a through hole suitable for the nozzle to pass through is formed in the frame body, the limiting member is a limiting ring, and the limiting ring is fixed on the outer peripheral wall of the nozzle; the limiting ring and the first gear are respectively positioned on two sides of the through hole.
In a possible implementation manner, the drainage structure further comprises a collection box, a third pipeline is arranged on the collection box, the third pipeline has a high end and a low end, the high end of the third pipeline is communicated with the outlet of the drainage channel, and the low end of the third pipeline is communicated with one side of the collection box;
the collecting box is internally provided with liquid, and the lower end of the third pipeline is positioned in the liquid.
In the embodiment of the application, when the jam appears in drainage channel, the first end and the air supply intercommunication of first pipeline provide pressure gas in to the casing, can make pressure gas spout to drainage channel's diapire along the end of buckling of shower nozzle, pressure gas strikes the silt on the drainage channel diapire, make silt on the drainage channel diapire move along drainage channel's diapire, and finally discharge from drainage channel's export, be convenient for clear up the silt on the drainage channel diapire, can improve drainage effect. The rotating mechanism drives the spray head to rotate, so that the cleaning area of the spray head can be increased, and the sediment at a certain position on the bottom wall of the drainage channel is subjected to intermittent airflow impact, so that the sediment can be separated from the bottom wall of the drainage channel more easily, and the cleaning effect is improved.
Compared with the prior art, the drainage structure of the retaining wall of the hydraulic engineering, provided by the invention, has the advantages that the sand in the drainage channel can be cleaned through the matching of the shell, the spray head, the first pipeline and the rotating mechanism, so that the drainage effect of the retaining wall is improved conveniently.
Drawings
Fig. 1 is a schematic view of a drainage structure of a retaining wall in a hydraulic engineering according to an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic view of a sealing plate portion of a drainage structure of a retaining wall in a hydraulic engineering according to an embodiment of the present invention;
FIG. 4 is an enlarged view of portion B of FIG. 3;
fig. 5 is a schematic cross-sectional view illustrating an internal structure of a housing of a drainage structure of a retaining wall in a hydraulic engineering according to an embodiment of the present invention;
FIG. 6 is an enlarged view of portion C of FIG. 5;
fig. 7 is a schematic view of a first gear and a second gear of a drainage structure of a retaining wall in a hydraulic engineering according to an embodiment of the present invention.
Description of the reference numerals: 1. a housing; 11. an opening; 12. an elastic member; 2. a spray head; 21. bending the end; 3. a rotation mechanism; 31. a fan blade; 32. accommodating the box; 321. an air outlet; 33. a ball bearing; 34. a frame body; 35. a first gear; 36. a second gear; 37. a drive motor; 38. a limiting ring; 4. a drainage channel; 41. an outlet; 5. closing plates; 6. a drain hole; 7. a telescopic rod; 8. a piston.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 7, a water drainage structure of a retaining wall in a hydraulic engineering according to the present invention will now be described. The water conservancy project retaining wall drainage structure comprises a shell 1, a spray head 2, a first pipeline (not shown in the figure) and a rotating mechanism 3; the shell 1 is suitable for being arranged on the top wall of the drainage channel 4, and the lower surface of the shell 1 is provided with air holes; one end of the nozzle 2 is communicated with the air hole, and the other end is a bent end 21; the nozzle 2 has the freedom of rotation around the axis of the air hole, and the bent end 21 faces the bottom wall of the drainage channel 4; the first conduit has a first end adapted to extend out of the top wall of the retaining wall, and a second end communicating with the side wall of the casing 1; the first end is suitable for being communicated with a gas source; the rotating mechanism 3 is arranged on the lower surface of the shell 1, the rotating mechanism 3 is provided with a rotating driving end connected with the outer wall surface of the spray head 2, and the rotating driving end is suitable for driving the spray head 2 to rotate around the axial direction of the air holes.
In the embodiment of the application, when jam appears in drainage channel 4, the first end and the air supply intercommunication of first pipeline, to providing pressure gas in the casing 1, can make pressure gas spout to drainage channel 4's diapire along the end 21 of buckling of shower nozzle 2, pressure gas strikes the silt on drainage channel 4 diapire, make the silt on drainage channel 4 diapire move along drainage channel 4's diapire, and finally discharge from drainage channel 4's export, be convenient for clear up the silt on drainage channel 4 diapire, can improve drainage effect. Drive shower nozzle 2 through rotary mechanism 3 and rotate, can improve the clearance area of shower nozzle 2, and carry out intermittent type nature air current impact to the silt of a certain position on the 4 diapalls of drainage channel, can make silt and 4 diapalls of drainage channel's separation more easily, improve the clearance effect.
Compared with the prior art, the drainage structure of the retaining wall of the hydraulic engineering, provided by the invention, has the advantages that the sand in the drainage channel 4 can be cleaned through the matching of the shell 1, the spray head 2, the first pipeline and the rotating mechanism 3, so that the drainage effect of the retaining wall is improved conveniently.
In some embodiments, as shown in fig. 1 to 7, the rotating mechanism 3 includes a second pipe (not shown) and a plurality of blades 31, the plurality of blades 31 are distributed along the circumferential direction of the nozzle 2 and are all fixed on the outer wall surface of the nozzle 2; the second pipeline is provided with an output end and an input end communicated with the first pipeline or the shell 1; the output end of the second pipeline faces the fan blades 31, so that the fan blades 31 rotate under the action of air flow; in the rotating process of the spray head 2, the axial position between the spray head 2 and the shell 1 is kept unchanged, and the connection part of the spray head 2 and the shell 1 is in sealing connection, so that pressure gas leaked from the connection part of the spray head 2 and the shell 1 can be reduced.
Provide the pressure air current through second pipeline output to flabellum 31, consequently can make shower nozzle 2 rotate around the axis of bleeder vent, be convenient for improve shower nozzle 2's clearance area, can reduce the silt on the 4 diapalls of drainage channel, improve drainage channel 4's drainage effect.
In some embodiments, as shown in fig. 1 to 7, the rotation mechanism 3 further includes an accommodation box 32, the accommodation box 32 being fixed to the lower surface of the housing 1; the fan blade 31 is positioned in the inner cavity of the accommodating box 32, and the output end of the second pipeline is communicated with the side wall of the accommodating box 32; the housing case 32 has a through hole adapted for the ejection head 2 to come out, and the lower surface of the housing case 32 has an air outlet 321 toward the bottom wall of the drainage passage 4; a closed space can be formed in the accommodating box 32, the fan blade 31 can be driven to rotate by the pressure gas exhausted from the output end of the second pipeline, and the pressure gas entering the accommodating box 32 can be exhausted from the air outlet 321 of the accommodating box 32; since the air outlet 321 of the housing box 32 faces the bottom wall of the drain passage 4, the pressure gas discharged from the air outlet 321 of the housing box 32 can also clean the bottom wall of the drain passage 4 of silt.
In some embodiments, as shown in fig. 1 to 7, the upper and lower surfaces of fan blade 31 are in contact with the upper and lower surfaces of the inner cavity of containing box 32, respectively; the upper surface and the lower surface of the fan blade 31 are both provided with a plurality of grooves, the grooves are internally provided with rolling balls 33, and the fan blade 31 is in running fit with the accommodating box 32 through the rolling balls 33; the bent end 21 of the ejection head 2 is located outside the containing box 32; through the arrangement, the fan blades 31 can limit the axial position of the spray head 2, the spray head 2 can be prevented from sliding along the axis direction of the spray head 2 in the rotating process of the spray head 2, pressure gas in the shell 1 can be ensured to pass through the spray head 2, and the spray head 2 can conveniently clean silt on the bottom wall of the drainage channel 4; because the upper surface and the lower surface of the fan blade 31 are in running fit with the accommodating box 32 through the rolling balls 33, the friction between the fan blade 31 and the accommodating box 32 can be reduced, and the fan blade 31 can be driven to rotate by the pressure gas conveniently.
In some embodiments, as shown in fig. 1 to 7, the housing 1 has an opening 11 adapted to face the drainage hole, the opening 11 and the second end of the first duct being located at opposite sides of the housing 1, respectively; the drainage structure also comprises a sealing plate 5 and a sliding part, wherein the sliding part is suitable for being arranged in the opening 11 of the shell 1 in a sliding mode; the closing plate 5 is connected with the outer side end of the sliding part, and the closing plate 5 closes or opens the drain hole 6 under the sliding action of the sliding part; the sliding part is suitable for closing or opening the air holes; after the sliding piece slides outwards under the action of pressure gas, the sealing plate 5 seals the water discharging hole 6, and the sliding piece opens the air hole; the area of the sealing plate 5 is larger than that of the drain hole 6; when the sediment on the bottom wall of the drainage channel 4 needs to be cleaned, pressure gas is introduced into the shell 1; after the casing 1 is filled with the pressure gas, the pressure gas drives the sliding piece to slide outwards, so that the sealing plate 5 can close the drainage hole 6; after the slider outwards moved, the bleeder vent on casing 1 was opened to the slider for pressure gas can pass through in the shower nozzle 2, and the pressure gas of being convenient for strikes the silt on the drain passage 4 diapire.
After the drainage hole 6 is sealed, the pressure gas discharged from the drainage hole 6 can be reduced, and more pressure gas can flow out from the outlet 41 of the drainage channel 4, so that the sediment on the bottom wall of the drainage channel 4 can be driven to move towards the outlet 41 of the drainage channel 4, the cleaning effect can be improved, the sediment on the bottom wall of the drainage channel 4 can be reduced, and the drainage effect can be improved.
In addition, after the drain hole 6 is closed, the flying dust flying out from the drain hole 6 can be reduced, and the pollution of the flying dust to the environment can be reduced.
In some embodiments, as shown in fig. 1 to 7, the sliding member includes a telescopic rod 7 and a piston 8, an outer peripheral wall of the piston 8 is connected with an inner cavity peripheral wall of the housing 1 in a sealing manner, one end of the telescopic rod 7 is arranged through an opening 11 of the housing 1 and is fixedly connected with the piston 8; after the pressurized gas is introduced into the housing 1, the pressurized gas pushes the piston 8 to move outwards, so that the telescopic rod 7 can slide outwards, and the sealing plate 5 can close the drainage hole 6 conveniently.
In some embodiments, as shown in fig. 1 to 7, an elastic member 12 is disposed in the housing 1, one end of the elastic member 12 is connected to the piston 8, and the other end of the elastic member 12 is connected to the inner wall of the housing 1; the elastic member 12 is used for providing elastic force to the piston 8 so as to retract the telescopic rod 7 into the housing 1; the elastic part 12 comprises a spring, and after cleaning is finished, the piston 8 is reset under the action of the spring, so that the sealing plate 5 can open the drain hole 6, and normal use of the drain hole 6 is facilitated.
In some embodiments, as shown in fig. 1 to 7, the rotating mechanism 3 includes a frame 34, a first gear 35, a second gear 36, and a driving motor 37, wherein the frame 34 is fixed on the lower surface of the housing 1; the first gear 35 is fixed on the peripheral wall of the nozzle 2, and the second gear 36 is meshed with the first gear 35; the driving motor 37 is fixed on the frame body 34, and the output end of the driving motor 37 is connected with the second gear 36; the frame body 34 is provided with a limiting piece suitable for axially limiting the spray head 2; the driving motor 37 can drive the second gear 36 to rotate, and the second gear 36 is meshed with the first gear 35, so that the spray head 2 can rotate around the axis of the air hole after the second gear 36 rotates, and the cleaning range of the spray head 2 is convenient to improve.
In some embodiments, as shown in fig. 1 to 7, a through hole suitable for the nozzle 2 to pass through is formed on the frame body 34, the limiting member is a limiting ring 38, and the limiting ring 38 is fixed on the outer circumferential wall of the nozzle 2; the limiting ring 38 and the first gear 35 are respectively positioned at two sides of the through hole; spacing ring 38 and first gear 35 contact with the both sides of support body 34 respectively, and the axial position of shower nozzle 2 can be injectd through spacing ring 38 and first gear 35's cooperation to shower nozzle 2 for axial skew can not take place at the rotation in-process, consequently the pressure gas in the casing 1 of being convenient for flows through shower nozzle 2 always, thereby the pressure gas of being convenient for strikes the silt on the 4 diapalls of drainage channel.
In some embodiments, as shown in fig. 1 to 7, the drainage structure further comprises a collection tank (not shown), on which a third pipe (not shown) is provided, the third pipe having a high end and a low end, the high end of the third pipe being communicated with the outlet 41 of the drainage channel 4, the low end of the third pipe being communicated with one side of the collection tank; the collecting box is internally provided with liquid, and the lower end of the third pipeline is positioned in the liquid; the liquid in the collection tank comprises water; silt and pressure gas flowing out of the outlet 41 of the drainage channel 4 enter a collecting box through a third pipeline, and because water is arranged in the collecting box and the lower end of the third pipeline is positioned in the water, dust and silt can be positioned in the water, and the gas can enter the atmosphere from the water surface; through the arrangement, the dust in a construction site can be reduced, and the pollution to the environment is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a hydraulic engineering retaining wall drainage structures which characterized in that includes:
the shell is suitable for being arranged on the top wall of the drainage channel, and the lower surface of the shell is provided with air holes;
one end of the spray head is communicated with the air vent, and the other end of the spray head is a bent end; the spray head has the freedom degree of rotating around the axis of the air vent, and the bent end faces the bottom wall of the drainage channel;
a first conduit having a first end adapted to extend out of a top wall of a retaining wall and a second end in communication with a side wall of the housing; the first end is adapted to communicate with a gas source; and
the rotating mechanism is arranged on the lower surface of the shell and is provided with a rotating driving end connected with the outer wall surface of the spray head, and the rotating driving end is suitable for driving the spray head to rotate around the axial direction of the air holes;
the shell is provided with an opening suitable for facing the drain hole, and the opening and the second end of the first pipeline are respectively positioned at two opposite sides of the shell;
the drainage structure also comprises a sealing plate and a sliding part, and the sliding part is suitable for being arranged in the opening of the shell in a sliding mode; the sealing plate is connected with the outer side end of the sliding part and closes or opens the drain hole under the sliding action of the sliding part; the sliding piece is suitable for closing or opening the air holes;
after the sliding part slides outwards under the action of pressure gas, the sealing plate seals the drain hole, and the sliding part opens the vent hole;
the sliding part comprises a telescopic rod and a piston, the peripheral wall of the piston is hermetically connected with the peripheral wall of the inner cavity of the shell, and one end of the telescopic rod penetrates through the opening of the shell and is connected with the piston;
an elastic piece is arranged in the shell, one end of the elastic piece is connected with the piston, and the other end of the elastic piece is connected with the inner wall of the shell; the elastic piece is used for providing elastic force for the piston so as to enable the telescopic rod to retract into the shell.
2. The hydraulic retaining wall drainage structure of claim 1, wherein the rotation mechanism includes a second pipe and a plurality of fan blades, the fan blades are distributed along the circumferential direction of the nozzle and are all fixed on the outer wall surface of the nozzle;
the second pipeline is provided with an output end and an input end communicated with the first pipeline or the shell; the output end of the second pipeline faces the fan blades, so that the fan blades rotate under the action of air flow.
3. A hydraulic engineering retaining wall drainage structure according to claim 2, wherein the rotation mechanism further comprises an accommodation box fixed to a lower surface of the housing; the fan blades are positioned in the inner cavity of the accommodating box, and the output end of the second pipeline is communicated with the side wall of the accommodating box;
the accommodating box is provided with a through hole suitable for the spray head to penetrate out, and the lower surface of the accommodating box is provided with an air outlet facing the bottom wall of the drainage channel.
4. A hydraulic retaining wall drainage structure according to claim 3, wherein the upper and lower surfaces of the fan blade are in contact with the upper and lower surfaces of the inner cavity of the housing box, respectively;
the upper surface and the lower surface of flabellum all are equipped with a plurality of recesses, be equipped with the ball in the recess, the flabellum passes through the ball with hold box normal running fit.
5. The hydraulic retaining wall drainage structure of claim 1, wherein the rotation mechanism includes a frame body, a first gear, a second gear and a driving motor, the frame body is fixed on the lower surface of the housing;
the first gear is fixed on the peripheral wall of the spray head, and the second gear is meshed with the first gear; the driving motor is fixed on the frame body, and the output end of the driving motor is connected with the second gear;
the frame body is provided with a limiting part which is suitable for axially limiting the spray head.
6. The hydraulic engineering retaining wall drainage structure of claim 5, wherein the frame body is provided with a through hole suitable for the nozzle to pass through, the limiting member is a limiting ring, and the limiting ring is fixed on the outer peripheral wall of the nozzle; the limiting ring and the first gear are respectively positioned on two sides of the through hole.
7. A hydraulic retaining wall drainage structure according to claim 1, wherein the drainage structure further comprises a collection tank, the collection tank having a third conduit with a high end and a low end, the high end of the third conduit communicating with the outlet of the drainage channel and the low end of the third conduit communicating with one side of the collection tank;
the collecting box is internally provided with liquid, and the lower end of the third pipeline is positioned in the liquid.
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| CN202111176704.0A CN113718848B (en) | 2021-10-09 | 2021-10-09 | Hydraulic engineering retaining wall drainage structures |
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| CN202111176704.0A CN113718848B (en) | 2021-10-09 | 2021-10-09 | Hydraulic engineering retaining wall drainage structures |
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| JP3208341U (en) * | 2016-10-25 | 2017-01-05 | ▲蔦▼井株式会社 | Drain pipe cleaning device |
| CN107489195B (en) * | 2017-09-01 | 2023-08-15 | 上海市水利工程设计研究院有限公司 | Drainage pipeline dredging integrated device based on high-pressure rotary jet flow |
| CN112282037B (en) * | 2020-09-16 | 2021-11-30 | 南京驭逡通信科技有限公司 | Municipal pipeline silt cleaning machines people |
| CN213836730U (en) * | 2020-11-20 | 2021-07-30 | 鞠晓楠 | Hydraulic engineering retaining wall drainage structures |
| CN214005573U (en) * | 2020-12-02 | 2021-08-20 | 欣驰建设工程有限公司 | Hydraulic engineering retaining wall |
| CN113266070B (en) * | 2021-04-28 | 2022-08-12 | 浙江易承环境科研有限公司 | Municipal drainage pipeline pull throughs |
| CN113235728A (en) * | 2021-06-04 | 2021-08-10 | 江苏全心建设有限公司 | Municipal works sewer desilting device |
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