Water supply and drainage pipeline cleaning equipment

By designing cleaning equipment for water supply and drainage pipes with different inner diameters, and combining revolution and rotation components, the problems of adaptability and incomplete cleaning of existing equipment have been solved, achieving a more efficient inner wall cleaning effect.

CN223571555UActive Publication Date: 2025-11-21ZIBO HENGLIN CONSTR ENG CO LTD
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Patent Information

Application Number
CN202423047440.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-11-21
Estimated Expiration
2034-12-11

AI Technical Summary

Technical Problem

Existing water supply and drainage pipe cleaning equipment is difficult to adapt to pipes with different inner diameters, and the unidirectional rotation function of the brush roller may lead to incomplete cleaning of the inner wall.

Method used

A cleaning device comprising a turntable, a fixed component, a brush roller, a revolution component, and a rotation component is designed. By combining the revolution component and the rotation component, multiple rotation modes of the brush roller are achieved, adapting to pipes with different inner diameters and improving the cleaning effect.

Benefits of technology

It enables automatic adaptive cleaning of pipes with different inner diameters, ensuring that the brush roller can rotate in multiple ways during the cleaning process, thereby improving the cleaning effect of the inner wall and the rational utilization of the rotational force.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of pipeline cleaning, and discloses a water supply and drainage pipeline cleaning device which comprises a base and further comprises a rotary disc, a water supply and drainage pipeline cleaning device and a water supply and drainage pipeline cleaning device. The number of the fixing assemblies is four, the four fixing assemblies are evenly arranged on the top of the base, and the fixing assemblies are used for fixing the water supply pipeline; the number of the brush rollers is two, and the two brush rollers are both arranged on the side face of the rotary disc and used for cleaning the water supply pipeline; the connecting assembly is arranged on the rotating disc, and the connecting assembly is used for connecting the brush roller and the rotating disc; and the revolution assembly is arranged on the side face of the rotating disc and the bottom of the base, and the revolution assembly is used for enabling the two brush rollers to revolve. The pipeline cleaning device can be automatically suitable for cleaning pipelines with different inner diameters, and can also provide various rotating modes for the brush roller when the water supply pipeline is cleaned, so that the brushing effect of the brush roller on the inner wall of the water supply pipeline is ensured, and the using effect of the device is further improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline cleaning technical field especially relates to a water supply and drainage pipeline cleaning equipment. BACKGROUND

[0002] Drainage pipeline refers to the pipeline system for discharging sewage, rainwater or other liquids. In building, road, bridge and other engineering, drainage pipeline plays a very important role, which can effectively discharge waste water and rainwater from the building or site, maintain environmental sanitation and stability of engineering structure, and the inner wall of water supply and drainage pipeline will deposit many foreign matters after long-term use, which needs to be taken down for cleaning the inner wall.

[0003] The utility model discloses a kind of inner wall cleaning equipment of municipal water supply and drainage pipeline, current water supply and drainage pipeline cleaning equipment, usually all through single brush roll and water spray are cleaned to the inner wall of water supply and drainage pipeline, so as to cause not convenient to clean the water supply and drainage pipeline of different inner diameter, and when cleaning water supply and drainage pipeline, brush roll only has the function of unidirectional rotation, it can occur that the inner wall of water supply and drainage pipeline is not cleaned enough, so, urgently needs to design a kind of water supply and drainage pipeline cleaning equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems in prior art, and provides a kind of water supply and drainage pipeline cleaning equipment.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of water supply and drainage pipeline cleaning equipment, including base, still include:

[0007] Rotating disc, rotating disc is set in the upper of base, rotating disc is located at the side of base;

[0008] Fixed component, fixed component has four, four fixed components are evenly set in the top of base, and fixed component is used to fix water supply pipeline;

[0009] Brush roll, brush roll has two, two brush rolls are all set in the side of rotating disc, and brush roll is used to clean water supply pipeline;

[0010] Connecting component, connecting component is set in rotating disc, and connecting component is used to connect brush roll and rotating disc;

[0011] Revolution component, revolution component is set in the side of rotating disc and the bottom of base, and revolution component is used to make two brush rolls revolve;

[0012] Rotation component, rotation component is set in the side of rotating disc, and rotation component is also connected with revolution component, and rotation component is used to make two brush rolls rotate.

[0013] As a further technical scheme of the utility model, the fixed assembly includes: a hydraulic telescopic rod, the hydraulic telescopic rod is horizontally fixedly installed on the side of the base, the output end of the hydraulic telescopic rod is fixedly installed with a clamping block, and the clamping block is used for clamping the water supply pipeline to ensure the stability during cleaning.

[0014] As a further technical scheme of the utility model, the connecting assembly includes: a horizontal groove, the horizontal groove is provided on and penetrates through the side of the rotating disc, two symmetrically arranged first sliding blocks are slidably arranged in the horizontal groove, connecting columns are rotatably arranged on the sides of the two first sliding blocks, the two connecting columns are fixedly installed at the top ends of the two brush rollers respectively, first spring rods are installed at the two ends of the horizontal groove, and the two first spring rods are installed on the sides of the corresponding first sliding blocks respectively.

[0015] As a further technical scheme of the utility model, the revolving assembly includes: a mounting frame, the mounting frame is fixedly installed on the side of the rotating disc, a side plate is rotatably installed at the center of the side of the mounting frame, first pulleys are rotatably installed at the two ends of the side of the side plate away from the mounting frame, and first belts are sleeved on the surfaces of the two first pulleys.

[0016] As a further technical scheme of the utility model, a groove penetrating through the side of the base is formed in the base, an electric telescopic rod is installed in the groove, the output end of the electric telescopic rod is fixedly installed on the side of the side plate, a sleeve is horizontally fixedly installed at the bottom of the base, a sleeve rod is slidably arranged in the sleeve, the top end of the sleeve rod penetrates through the sleeve and is fixedly installed on the side of the side plate, and the sides of the two first pulleys are fixedly installed on the end faces of the sleeve rod and the end face of the mounting frame through connecting shafts respectively.

[0017] As a further technical scheme of the utility model, a spiral groove is formed in the sleeve, a convex column is slidably arranged in the spiral groove, and the convex column is fixedly installed on the surface of the sleeve rod.

[0018] As a further technical scheme of the utility model, the revolving assembly includes: a second belt, the second belt is arranged on the side of the rotating disc, second pulleys are rotatably installed on the end faces of the two first sliding blocks, a vertical groove is vertically formed on the side of the rotating disc, a second sliding block is slidably installed in the vertical groove, a third pulley is rotatably installed on the end face of the second sliding block, the second belt is sleeved on the surfaces of the third pulley and the two second pulleys, a second spring rod is installed at the inner end of the vertical groove, and the telescopic end of the second spring rod is installed on the side of the second sliding block.

[0019] As a further technical scheme of the utility model, a first bevel gear is fixedly arranged on the end face of the third pulley, a second bevel gear is engaged with the side of the first bevel gear, a sliding column is fixedly arranged at the center of the side of the second bevel gear, a sleeve column is sleeved on the end portion of the sliding column through a spline, the sliding column is installed on the surface of the second sliding block through a first connecting plate, and the sliding column and the first connecting plate are rotatably arranged.

[0020] As a further technical scheme of the utility model, the third bevel gear is fixed on the end surface of the sleeve column, the fourth bevel gear is engaged on the side surface of the third bevel gear, the rotating rod is fixed at the center of the side surface of the fourth bevel gear, the engaging gear is fixed on the end surface of the rotating rod, the rotating rod is installed on the surface of the rotating disc through the third connecting plate, and the rotating rod and the third connecting plate are rotatably arranged, the gear ring is sleeved outside the rotating disc, the engaging gear and the gear ring are engaged with each other, and the gear ring is fixedly installed on the side surface of the side plate through the fourth connecting plate.

[0021] The utility model discloses the beneficial effects are:

[0022] The utility model discloses the setting of revolution subassembly and rotation subassembly not only can be suitable for the pipe cleaning of different inner diameter automatically, can also provide multiple rotating modes for brush roller when cleaning the water supply pipe, guarantee the effect that brush roller brushes and washes the inner wall of water supply pipe, in addition, when the brush roller rotates, only rely on the action force produced when the rotating disc rotates to rotate the brush roller, further improve the reasonable utilization of rotation force, and further improve the use effect of the equipment. ACCURACY OF DRAWINGS

[0023] Figure 1 The utility model proposes a kind of water supply and drainage pipeline cleaning equipment structure schematic view;

[0024] Figure 2 For Figure 1 The enlarged schematic view of part A in it;

[0025] Figure 3 The sleeve sectional structure schematic view of the utility model proposes a kind of water supply and drainage pipeline cleaning equipment;

[0026] Figure 4 For Figure 3 The enlarged schematic view of part B in it;

[0027] Figure 5 The structure schematic view of the utility model proposes a kind of water supply and drainage pipeline cleaning equipment after mounting frame and rotating disc are separated;

[0028] Figure 6 For Figure 5 The enlarged schematic view of part C in it;

[0029] Figure 7 The rotating disc structure schematic view of the utility model proposes a kind of water supply and drainage pipeline cleaning equipment.

[0030] In the figure: 1, base; 2, clamp block; 3, hydraulic telescopic rod; 4, brush roller; 5, connecting column; 6, electric telescopic rod; 7, sleeve rod; 8, sleeve; 9, convex column; 10, spiral groove; 11, rotating disc; 12, mounting frame; 13, side plate; 14, first belt; 15, first pulley; 16, tooth ring; 17, second belt; 18, second pulley; 19, third pulley; 20, first bevel gear; 21, second bevel gear; 22, sliding column; 23, sleeve column; 24, third bevel gear; 25, fourth bevel gear; 26, rotating rod; 27, meshing gear; 28, horizontal groove; 29, first sliding block; 30, first spring rod; 31, vertical groove; 32, second sliding block; 33, second spring rod. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the following further describes the utility model embodiments in combination with specific embodiments.

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 7 A water supply and drainage pipeline cleaning device, comprising a base 1, further comprising: a rotating disc 11, a fixing assembly, a brush roller 4, a connecting assembly, a revolution assembly and a rotation assembly, the rotating disc 11 is arranged above the base 1, the rotating disc 11 is located on the side of the base 1, the fixing assembly has four, the four fixing assemblies are evenly arranged on the top of the base 1, the fixing assembly is used for fixing the water supply pipeline, the brush roller 4 has two, the two brush rollers 4 are arranged on the side of the rotating disc 11, the brush roller 4 is used for cleaning the water supply pipeline, the connecting assembly is arranged on the rotating disc 11, the connecting assembly is used for connecting the brush roller 4 and the rotating disc 11, the revolution assembly is arranged on the side of the rotating disc 11 and the bottom of the base 1, the revolution assembly is used for making the two brush rollers 4 revolve, the rotation assembly is arranged on the side of the rotating disc 11, the rotation assembly is further connected with the revolution assembly, the rotation assembly is used for making the two brush rollers 4 rotate, the above-mentioned brush roller 4 can move, rotate and revolve, and the cleaning effect of the water supply pipeline is improved.

[0034] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 2In a preferred implementation, the fixing assembly comprises a hydraulic telescopic rod 3 fixedly installed horizontally on the side of the base 1, and a clamping block 2 fixedly installed at the output end of the hydraulic telescopic rod 3, which is used to clamp the water supply pipeline to ensure the stability during cleaning.

[0035] Specifically, the water supply pipeline can be fixed to ensure the stability during subsequent cleaning of the water-accumulating pipeline.

[0036] Please refer to the accompanying drawings Figure 6 - the accompanying drawings Figure 7 In a preferred implementation, the connecting assembly comprises a horizontal groove 28 formed through the side of the rotating disc 11, two symmetrically arranged first sliding blocks 29 slidingly arranged inside the horizontal groove 28, two connecting columns 5 rotatably arranged on the sides of the first sliding blocks 29, two brush rollers 4 fixedly installed at the top ends of the two connecting columns 5, and two first spring rods 30 installed at the two ends of the horizontal groove 28 and respectively arranged on the sides of the corresponding first sliding blocks 29.

[0037] Preferably, the horizontal groove 28 and the first sliding blocks 29 are used to connect the brush rollers 4 and the rotating disc 11, so that the brush rollers 4 can rotate with the rotating disc 11 and can also move relative to the rotating disc 11.

[0038] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 7 In a preferred implementation, the revolving assembly comprises a mounting frame 12 fixedly installed on the side of the rotating disc 11, a side plate 13 rotatably installed at the center of the side of the mounting frame 12, two first pulleys 15 rotatably installed at the two ends of the side of the side plate 13 away from the mounting frame 12, a first belt 14 sleeved on the surfaces of the two first pulleys 15, a recess formed through the side of the base 1 and installed with an electric telescopic rod 6 inside, an output end of the electric telescopic rod 6 fixedly installed on the side of the side plate 13, a sleeve 8 fixedly installed horizontally on the bottom of the base 1, a sleeve rod 7 slidingly arranged inside the sleeve 8, a top end of the sleeve rod 7 penetrating through the sleeve 8 and fixedly installed on the side of the side plate 13, two connecting shafts respectively fixedly installed on the end face of the sleeve rod 7 and the end face of the mounting frame 12 through the sides of the two first pulleys 15, a helical groove 10 formed inside the sleeve 8 and installed with a convex column 9 slidingly arranged inside, and the convex column 9 fixedly installed on the surface of the sleeve rod 7.

[0039] Further, the mounting frame 12 drives the rotating disc 11 to rotate, and the rotating disc 11 drives the first sliding blocks 29, the connecting columns 5 and the brush rollers 4 to rotate, so that the brush rollers 4 can revolve and move at the same time.

[0040] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 7In a preferred implementation, the rotation assembly comprises: a second belt 17 arranged on the side of the rotating disc 11, two second pulleys 18 rotatably arranged on the end face of the two first sliding blocks 29, a vertical slot 31 vertically arranged on the side of the rotating disc 11, a second sliding block 32 slidably arranged in the vertical slot 31, a third pulley 19 rotatably arranged on the end face of the second sliding block 32, the second belt 17 sleeved on the surface of the third pulley 19 and the two second pulleys 18, a second spring rod 33 arranged in the vertical slot 31, the second spring rod 33 arranged on the side of the second sliding block 32, a first bevel gear 20 fixed on the end face of the third pulley 19, a second bevel gear 21 engaged with the side of the first bevel gear 20, a slide column 22 fixed on the side center of the second bevel gear 21, a sleeve column 23 sleeved on the end of the slide column 22, the slide column 22 arranged on the surface of the second sliding block 32 through a first connecting plate, the slide column 22 rotatably arranged with the first connecting plate, the sleeve column 23 arranged on the side of the rotating disc 11 through a second connecting plate, the sleeve column 23 rotatably arranged with the second connecting plate, a third bevel gear 24 fixed on the end face of the sleeve column 23, a fourth bevel gear 25 engaged with the side of the third bevel gear 24, a rotating rod 26 fixed on the side center of the fourth bevel gear 25, an engagement gear 27 fixed on the end face of the rotating rod 26, the rotating rod 26 arranged on the surface of the rotating disc 11 through a third connecting plate, the rotating rod 26 rotatably arranged with the third connecting plate, a tooth ring 16 sleeved on the outside of the rotating disc 11, the engagement gear 27 and the tooth ring 16 engaged with each other, and the tooth ring 16 fixedly arranged on the side of the side plate 13 through a fourth connecting plate.

[0041] Preferably, the second belt 17 drives the two second pulleys 18 to rotate, the two second pulleys 18 drive the two connecting columns 5 to rotate, and the two connecting columns 5 drive the two brush rollers 4 to rotate, so that the brush roller 4 can rotate while revolving.

[0042] The working principle of the utility model is as follows:

[0043] First, the water supply pipeline is placed on the base 1 and clamped by the clamp block 2 and the hydraulic telescopic rod 3, and the water spray pipe is aimed at the inner cavity of the water supply pipeline for water spraying (the base 1 is provided with a water spray pipe connected with a water source);

[0044] Then, the side plate 13 is moved by the electric telescopic rod 6, the sleeve rod 7 and the brush roller 4 and the connecting components thereon are moved by the movement of the side plate 13, the convex column 9 is moved by the movement of the sleeve rod 7, the convex column 9 moves along the spiral groove 10 as the path, the convex column 9 rotates while moving, the sleeve rod 7 further rotates, the first belt 14 and the first pulley 15 are driven to rotate by the rotation of the sleeve rod 7, the mounting frame 12 is driven to rotate by the rotation of the first pulley 15, the rotating disc 11 is driven to rotate by the rotation of the mounting frame 12, and the first sliding block 29, the connecting column 5 and the brush roller 4 are driven to rotate by the rotation of the rotating disc 11, so that the brush roller 4 can revolve while moving, and the water supply pipeline is completely cleaned.

[0045] Finally, the first slider 29, the connecting column 5 and the brush roller 4 are away from each other due to centrifugal force when the rotating disc 11 rotates, so that different inner diameter pipes can be adapted, the movement of the first slider 29 drives the movement of the second pulley 18, the movement of the second pulley 18 causes the deformation of the second belt 17, the deformation of the second belt 17 causes the movement of the third pulley 19, so that the second belt 17 is always in a state of tension, in addition, the rotation of the rotating disc 11 drives the revolution of the meshing gear 27, due to the setting of the tooth ring 16, the revolution of the meshing gear 27 also drives the rotation of the meshing gear 27, the rotation of the meshing gear 27 drives the rotation of the rotating rod 26, the rotation of the rotating rod 26 drives the rotation of the fourth bevel gear 25, the rotation of the fourth bevel gear 25 drives the rotation of the third bevel gear 24, the rotation of the third bevel gear 24 drives the rotation of the sleeve column 23, the rotation of the sleeve column 23 drives the rotation of the sliding column 22, the rotation of the sliding column 22 drives the rotation of the second bevel gear 21, the rotation of the second bevel gear 21 drives the rotation of the first bevel gear 20, the rotation of the first bevel gear 20 drives the rotation of the third pulley 19, the rotation of the third pulley 19 drives the rotation of the second belt 17, the rotation of the second belt 17 drives the rotation of the two second pulleys 18, the rotation of the two second pulleys 18 drives the rotation of the two connecting columns 5, the rotation of the two connecting columns 5 drives the rotation of the two brush rollers 4, so that the brush roller 4 can also rotate while revolving, thereby improving the cleaning effect of the water supply pipe.

[0046] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A water supply and drainage pipe cleaning device, comprising a base (1), characterized in that, Also includes: Turntable (11), the turntable (11) is disposed above the base (1), the turntable (11) is located on the side of the base (1); The fixing components are four in number and are evenly arranged on the top of the base (1). The fixing components are used to fix the water supply pipes. There are two brush rollers (4), both of which are located on the side of the turntable (11). The brush rollers (4) are used to clean the water supply pipes. A connecting component is disposed on a turntable (11) for connecting the brush roller (4) and the turntable (11); A revolution assembly is provided on the side of the turntable (11) and the bottom of the base (1), and the revolution assembly is used to make the two brush rollers (4) revolve. The self-rotating component is disposed on the side of the turntable (11) and is also connected to the revolution component. The self-rotating component is used to make the two brush rollers (4) rotate.

2. The water supply and drainage pipeline cleaning equipment according to claim 1, characterized in that, The fixing component includes a hydraulic telescopic rod (3), which is horizontally fixedly installed on the side of the base (1). A clamp (2) is fixedly installed at the output end of the hydraulic telescopic rod (3). The clamp (2) is used to clamp the water supply pipe to ensure stability during cleaning.

3. The water supply and drainage pipeline cleaning equipment according to claim 2, characterized in that, The connecting assembly includes: a transverse groove (28), which is opened and extends through the side of the turntable (11). Two symmetrically arranged first sliders (29) slide inside the transverse groove (28). Connecting posts (5) are rotatably arranged on the sides of the two first sliders (29). The two connecting posts (5) are respectively fixedly installed on the top of the two brush rollers (4). A first spring rod (30) is installed at both ends of the transverse groove (28). The two first spring rods (30) are respectively installed on the sides of the corresponding first sliders (29).

4. The water supply and drainage pipeline cleaning equipment according to claim 3, characterized in that, The revolution assembly includes: a mounting frame (12), which is fixedly mounted on the side of the turntable (11). A side plate (13) is rotatably mounted at the center of the side of the mounting frame (12). First pulleys (15) are rotatably mounted on both ends of the side of the side plate (13) away from the mounting frame (12). A first belt (14) is sleeved on the surface of the two first pulleys (15).

5. The water supply and drainage pipeline cleaning equipment according to claim 4, characterized in that, The base (1) has a groove that runs through the side of the base (1). An electric telescopic rod (6) is installed inside the groove. The output end of the electric telescopic rod (6) is fixedly installed on the side of the side plate (13). A sleeve (8) is fixedly installed horizontally at the bottom of the base (1). A sleeve rod (7) is slidably arranged inside the sleeve (8). The top end of the sleeve rod (7) passes through the sleeve (8) and is fixedly installed on the side of the side plate (13). The sides of the two first pulleys (15) are fixedly installed on the end face of the sleeve rod (7) and the end face of the mounting bracket (12) respectively through a connecting shaft.

6. The water supply and drainage pipeline cleaning equipment according to claim 5, characterized in that, The sleeve (8) has a spiral groove (10) inside, and a protrusion (9) is slidably arranged inside the spiral groove (10). The protrusion (9) is fixedly installed on the surface of the sleeve rod (7).

7. The water supply and drainage pipeline cleaning equipment according to claim 6, characterized in that, The self-rotating component includes: a second belt (17), which is disposed on the side of the turntable (11), and a second pulley (18) is rotatably mounted on the end face of each of the two first sliders (29). A vertical groove (31) is also vertically opened on the side of the turntable (11). A second slider (32) is slidably mounted inside the vertical groove (31). A third pulley (19) is rotatably mounted on the end face of the second slider (32). The second belt (17) is sleeved on the surface of the third pulley (19) and the two second pulleys (18). A second spring rod (33) is installed at the inner end of the vertical groove (31). The telescopic end of the second spring rod (33) is installed on the side of the second slider (32).

8. The water supply and drainage pipeline cleaning equipment according to claim 7, characterized in that, The end face of the third pulley (19) is fixed with a first bevel gear (20), and the side of the first bevel gear (20) is meshed with a second bevel gear (21). A sliding column (22) is fixed at the center of the side of the second bevel gear (21). The end of the sliding column (22) is sleeved with a sleeve column (23) through a spline. The sliding column (22) is mounted on the surface of the second slider (32) through a first connecting plate. The sliding column (22) and the first connecting plate are rotatably arranged. The sleeve column (23) is mounted on the side of the turntable (11) through a second connecting plate. The sleeve column (23) and the second connecting plate are rotatably arranged.

9. A water supply and drainage pipeline cleaning device according to claim 8, characterized in that, The end face of the sleeve (23) is fixed with a third bevel gear (24), the side of the third bevel gear (24) is meshed with a fourth bevel gear (25), the center of the side of the fourth bevel gear (25) is fixed with a rotating rod (26), the end face of the rotating rod (26) is fixed with a meshing gear (27), the rotating rod (26) is mounted on the surface of the turntable (11) through a third connecting plate, the rotating rod (26) and the third connecting plate are rotatably arranged, the turntable (11) is fitted with a toothed ring (16), the meshing gear (27) and the toothed ring (16) mesh with each other, and the toothed ring (16) is fixedly installed on the side of the side plate (13) through the fourth connecting plate.

Citation Information

Patent Citations

  • A cleaning device for the inner wall of municipal water supply and drainage pipes

    CN112792066B