Drainage pipeline internal hard stone deposition crushing device

By designing a hard rock deposition and crushing device for internal drainage pipes including rolling components, crushing components and stabilizing components, the problem of difficulty in cleaning hard rock deposited at the lower end of the inner wall of the pipe in the prior art is solved, and efficient hard rock crushing and cleaning is achieved, ensuring the stability of the device.

CN222931490UActive Publication Date: 2025-06-03HENAN ZHONGPAI PIPELINE TECH ENG CO LTD

Patent Information

Application Number
CN202421867402.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-05
Publication Date
2025-06-03
Estimated Expiration
2034-08-05

AI Technical Summary

Technical Problem

The prior art is difficult to effectively clean the deposited hard rocks at the lower end of the inner wall of the drainage pipe, especially when the pipe diameter is small and the length is large, it is difficult to penetrate deep into the pipe for crushing.

Method used

A hard rock deposition crushing device inside a drainage pipe is designed, including a base, a rolling assembly, a crushing assembly and a stabilizing assembly. The height of the slide plate and the arc-shaped shovel is adjusted by driving the arc-shaped shovel, and the deposited hard rock is impacted and broken through the telescopic end of the upper cylinder, and contacts the inner wall of the pipe through the telescopic end of the upper cylinder to ensure the stability of the device.

Benefits of technology

Effective crushing and cleaning of the deposited hard rocks at the lower end of the inner wall of the pipeline is achieved, the crushing efficiency of deposited hard rocks in the deep pipeline is improved, and the stability of the device traveling in the pipeline is enhanced.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222931490U_ABST
    Figure CN222931490U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of pipeline repair, in particular to a crushing device for hard stone deposition in a drainage pipeline. Comprising a base, a rolling assembly is arranged on the base, a crushing assembly is arranged at the front end of the base, and a stabilizing assembly is fixed to the upper end of the base; the crushing assembly comprises a reciprocating air cylinder fixed to the base, the axial direction of the reciprocating air cylinder is parallel to the advancing direction of the base, a fixed plate is fixed to the telescopic end of the reciprocating air cylinder, a movable rod is fixed to the fixed plate, the axis of the movable rod is parallel to the axis of the reciprocating air cylinder, the movable rod is slidably connected with the base, and a sliding plate is slidably arranged on the fixed plate. The sliding plate is connected with the fixing plate through a driving assembly, the driving assembly can adjust the height of the sliding plate, and an arc-shaped shovel is fixed to the front end of the sliding plate. The height of the sliding plate and the arc-shaped shovel can be adjusted through the driving assembly, and then deposited hard stones at the lower end of the inner wall of the pipeline can be crushed through the arc-shaped shovel.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline repair, and particularly relates to a device for breaking and removing hard stones deposited inside a drainage pipeline. Background Art

[0002] The ultraviolet light curing method is a trenchless repair method that uses ultraviolet light to irradiate an impregnated resin hose pulled into the original pipeline to cure and form a pipeline lining tube, which is one of the in-situ curing method for pipeline repair. Before repairing the original pipeline, it is necessary to dredge the original pipeline. However, a large amount of hard stones are likely to be deposited at the lower end of the original pipeline. Due to the aging of the original pipeline, the deposited hard stones will adhere to the inner wall of the lower end of the pipeline, and only high-pressure water cannot effectively clean the deposited hard stones adhering to the inner wall of the lower end of the pipeline.

[0003] The patent document with the application number 202410015063.8 discloses a rain and sewage pipeline dredging device. When the device is used, first, the mechanism can be placed into the pipeline, the first scraping ring and the second scraping ring are mutually attached to the inner wall of the pipeline, and then the threaded rod can be rotated, thereby driving the long plate and the column body to move out of the outer column, and further driving the blade and the second cone to move out of the outer column. Then, hold the C-shaped handrail and push the mechanism forward, or rotate the mechanism, thereby driving the first scraping ring and the second scraping ring to rotate, and then the accumulated sludge on the inner wall of the pipeline can be cleaned by using the first scraping ring and the second scraping ring. The inner wall of the pipeline can be flushed by spraying clean water through the first connecting hose and the second connecting hose to assist in cleaning the sludge on the inner wall of the pipeline, which is convenient for quickly cleaning the inner wall of the pipeline. The second cone and the first cone can disperse the blocked foreign objects, and the second cone and the first cone can also wind the filamentous foreign objects when rotating and take the filamentous foreign objects out of the pipeline. At the same time, the blade can cut the blocked foreign objects in the pipeline during rotation, which is convenient for quickly crushing the blocked foreign objects; then rotate the threaded rod in the reverse direction, thereby retracting the blade and the second cone back into the outer column, and then pull the outer column upward, thereby driving the connecting block to move towards the direction close to the disc, thereby compressing the spring, and then pulling the tops of the first L-shaped rod and the second L-shaped rod to rotate through the first rotating rod and the second rotating rod, and then driving the clamping plates on the bottoms of the first rotating rod and the second rotating rod to move towards each other, thereby clamping and taking out the blocked foreign objects, so as to dredge the pipeline. This device relies on manual drive to dredge the pipeline. However, when the pipeline diameter is small and the length is large, this device cannot clean the deposited hard stones deep in the pipeline.

[0004] The patent document with the application number 202410003274.X discloses a pipeline dredging machine for municipal use. When the pipeline dredging machine is working, the staff place the device in the municipal pipeline to be dredged. Then, the output shaft of the first cylinder expands and contracts to drive the moving wheels to move and contact the pipe wall. And the output shaft of the second cylinder expands and contracts to drive the top frame to move, so that the scraper contacts the pipe wall. Then, the water delivery pipe is installed on the external water supply pipeline. When the device is officially started, the clear water is conveyed through the water delivery pipe to the water collecting tray by the external water supply pipeline and discharged through the high-pressure nozzle, so that the device has a reaction force and moves in the pipeline. The output shaft of the driving motor drives the dredging turntable to rotate, and drives the cover plate and the fixed plate to rotate, so that the drilling head rotates to break the blockage in front. At the same time, when the fixed plate and the fixing plate rotate, due to the repulsion between the same poles of the second magnetic plate and the first magnetic plate, the sliding plate and the impact head slide on the fixing plate and impact the impact seat, transmitting the impact force to the fixed plate and the drilling head to perform vibratory crushing on the blockage. Then, the sliding plate is pushed back by the elasticity of the compression spring, so that the first magnetic plate and the impact head return to their original states and positions. In addition, the friction force between the scraper and the inclined scraper in contact with the pipe wall is used to clean the residue on the pipe wall. When encountering a hard object blockage, since the scraper and the connecting plate are hinged, the elastic bending plate is squeezed to avoid the hard convex object, and the water flow sprayed by the high-pressure nozzle is used to additionally clean the pipe wall. However, most of the deposited hard stones in the pipeline are concentrated at the lower end of the pipeline. The device is arranged in the middle of the pipeline, and it is not convenient to break the deposited hard stones near the lower end of the inner wall of the pipeline only by the rotation of the drilling head.

[0005] The patent document with application number 202022267539.7 discloses a device for crushing hard stone deposits inside a drainage pipe. When the device is working, the cylinder is connected to the air source through the air pipe, and the rotary joint is connected to the water source through the water pipe. The cylinder is started to extend the telescopic rod of the cylinder, and the crushing device is moved to move in the pipe. When the main body moves above the cement solids in the pipe, the water source is turned on, and water enters the center hole in the main shaft through the water pipe and the rotary joint. The water entering the center hole is sprayed toward the cement solids through the outlet hole, connecting hole, arc groove, drainage hole and nozzle. The air source is controlled to make the telescopic rod of the cylinder extend and contract rapidly, so that the main body, under the action of its gravity, impacts and crushes the cement solids below the main body through the drill rod. After the water is sprayed out from the nozzle, it acts on the cement solids. Under the action of the recoil force, the main body will swing, so that the drill rod can knock the cement solids below it at multiple positions, which can improve the crushing efficiency of the cement solids. At the same time, the small pieces of cement solids knocked down by the drill rod can be washed away by the water sprayed from the nozzle. When crushing the deposited hard stones, only relying on the up and down movement of the device and knocking the deposited hard stones through the drill rod, the device cannot be effectively stabilized after the drill rod contacts the deposited hard stones. The reaction force of the deposited hard stones on the drill rod can easily cause the device to topple in the pipeline, and the working stability performance needs to be improved. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a device for crushing hard rocks deposited in drainage pipes, which has good stability when crushing the deposited hard rocks and can effectively crush the deposited hard rocks near the lower end of the inner wall of the pipe. The device can penetrate into a small-diameter pipe to crush the hard rocks deposited in the groove deep in the pipe.

[0007] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0008] A device for crushing hard stone deposits inside a drainage pipe comprises a base, a rolling assembly is arranged on the base, a crushing assembly is arranged at the front end of the base, and a stabilizing assembly is fixed to the upper end of the base; the crushing assembly comprises a reciprocating cylinder fixed to the base, the axial direction of the reciprocating cylinder is parallel to the moving direction of the base, a fixed plate is fixed to the telescopic end of the reciprocating cylinder, a movable rod is fixed to the fixed plate, the axis of the movable rod is parallel to the axis of the reciprocating cylinder, the movable rod is slidably connected to the base, a slide plate is slidably arranged on the fixed plate, the slide plate is connected to the fixed plate through a driving assembly, the driving assembly can adjust the height of the slide plate, and an arc shovel is fixed to the front end of the slide plate.

[0009] Specifically, the stabilizing assembly includes an upper cylinder fixed to the upper end of the base, the upper cylinder is vertically arranged, a lifting plate is fixed on the telescopic rod of the upper cylinder, the telescopic rod of the upper cylinder penetrates the lifting plate, two sliding rods are elastically slidably connected to the lifting plate, the two sliding rods are symmetrically arranged on the left and right according to the axis of the upper cylinder, and the upper end of the sliding rod is rotatably connected to a top wheel.

[0010] Specifically, the slide bar passes through the lifting plate, a retaining ring is fixed on the slide bar above the lifting plate, a spring is sleeved on the slide bar between the retaining ring and the lifting plate, the upper end of the spring is fixedly connected to the retaining ring, and the lower end of the spring is fixedly connected to the lifting plate.

[0011] Specifically, a lower cylinder is fixed at the lower end of the base, the axial direction of the lower cylinder is parallel to the moving direction of the base, and an arc plate is detachably and fixedly connected to the telescopic end of the lower cylinder.

[0012] Specifically, a connecting column is fixed on the telescopic end of the lower cylinder, and the connecting bolt passes through the arc plate and is threadedly connected to the connecting column.

[0013] Specifically, the rolling assembly includes two supporting units, one of which is fixed at the front side of the base, and the other is fixed at the rear end of the base. The supporting unit includes two support plates that are symmetrically arranged on the left and right. The support plates are fixedly connected to the base, a motor is fixed on the support plates, and a roller is fixed on the output shaft of the motor. The stabilizing assembly is located between the two supporting units, and a light rod corresponding to the support plate is fixed on the arc plate. The light rod passes through the support plate on one side, and the light rod is slidably connected to the support plate on one side.

[0014] Specifically, a clearance hole corresponding to the telescopic rod of the lower cylinder is opened at the lower end of the fixing plate.

[0015] Specifically, a plurality of vertical sliding grooves are provided at the front end of the fixed plate, and sliding blocks are slidably engaged in the sliding grooves, and the sliding blocks are fixedly connected to the sliding plate.

[0016] Specifically, the driving assembly includes an adjusting cylinder fixed on a fixed plate, the adjusting cylinder is vertically arranged, and a telescopic end of the adjusting cylinder is fixedly connected to the slide plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model can adjust the height of the slide plate and the arc shovel through the driving assembly, and then can use the arc shovel to crush the deposited hard stones at the lower end of the inner wall of the pipeline.

[0019] 2. When crushing the hard rocks deposited on the lower end of the inner wall of the pipe, start the upper cylinder so that the telescopic end of the upper cylinder contacts the upper end of the inner wall of the pipe. During the crushing process, the stability of the device can be ensured, thereby improving the efficiency of crushing the hard rocks deposited on the lower end of the inner wall of the pipe.

[0020] 3. The arc-shaped plate can be pushed forward to scrape the residual deposited hard stones at the lower end of the inner wall of the pipeline, improving the cleaning effect of the deposited hard stones at the lower end of the pipeline.

[0021] 4. During the process of the device moving forward in the pipeline, the two top wheels can contact the upper end of the inner wall of the pipeline, improving the stability of the device moving forward in the pipeline. Description of the Drawings

[0022] Figure 1 It is the front view of the device.

[0023] Figure 2 It is the left view of the device.

[0024] Figure 3 It is the right view of the device.

[0025] Figure 4 It is the three-dimensional view of the device.

[0026] The names of the components in the drawings are:

[0027] 1 Base

[0028] 2 Support plate

[0029] 3 Roller

[0030] 4 Motor

[0031] 5 Lifting plate

[0032] 6 Slide bar

[0033] 7 Top wheel

[0034] 8 Retaining ring

[0035] 9 Spring

[0036] 10 Upper cylinder

[0037] 11 Lower cylinder

[0038] 12 Arc-shaped plate

[0039] 13 Connecting column

[0040] 14 Smooth rod

[0041] 15 Connecting bolt

[0042] 16 Movable rod

[0043] 17 Reciprocating cylinder

[0044] 18 Fixed plate

[0045] 19 Slide plate

[0046] 20 Adjusting cylinder

[0047] 21 Arc-shaped shovel

[0048] 22 Chute

[0049] 23 Relief hole. Detailed implementation mode

[0050] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0051] Embodiment 1: Refer to Figures 1 - 4 As shown, a device for crushing hard stone deposits inside a drainage pipe includes a base 1, and a rolling component is arranged on the base 1.

[0052] The rolling component includes two support units, one of the support units is fixed on the front side of the base 1, and the other support unit is fixed on the rear end of the base 1.

[0053] The support unit includes two support plates 2 arranged symmetrically left and right. The support plates 2 are fixedly connected to the base 1, and a motor 4 is fixed on the support plates 2. A roller 3 is fixed on the output shaft of the motor 4.

[0054] After starting the motor 4, the motor 4 can drive the roller 3 to rotate, and the device can travel in the pipeline during the rotation of the roller 3.

[0055] A stabilizing component is fixed on the upper end of the base 1, and the stabilizing component is located between the two support units.

[0056] The stabilizing component includes an upper cylinder 10 fixed on the upper end of the base 1. The upper cylinder 10 is arranged vertically. A lifting plate 5 is fixed on the telescopic rod of the upper cylinder 10. The telescopic rod of the upper cylinder 10 penetrates through the lifting plate 5. Two sliding rods 6 are elastically slidably connected to the lifting plate 5. Specifically, the sliding rods 6 penetrate through the lifting plate 5. A retaining ring 8 is fixed on the sliding rod 6 above the lifting plate 5. A spring 9 is sleeved on the sliding rod 6 between the retaining ring 8 and the lifting plate 5. The upper end of the spring 9 is fixedly connected to the retaining ring 8, and the lower end of the spring 9 is fixedly connected to the lifting plate 5. The two sliding rods 6 are arranged symmetrically left and right with respect to the axis of the upper cylinder 10, and the upper ends of the sliding rods 6 are rotatably connected to a top wheel 7.

[0057] During the process of the device traveling in the pipeline, start the upper cylinder 10 so that the two top wheels 7 are in rolling contact with the upper end of the inner wall of the pipeline. The stability of the device can be improved during the process of traveling in the pipeline.

[0058] A crushing assembly is provided at the front end of the base 1. The crushing assembly includes a reciprocating cylinder 17 fixed on the base 1, the axial direction of the reciprocating cylinder 17 is parallel to the travel direction of the base 1, a fixed plate 18 is fixed to the telescopic end of the reciprocating cylinder 17, a movable rod 16 is fixed on the fixed plate 18, the axis of the movable rod 16 is parallel to the axis of the reciprocating cylinder 17, the movable rod 16 is slidably connected to the base 1, a slide plate 19 is slidably provided on the fixed plate 18, the slide plate 19 is connected to the fixed plate 18 through a driving assembly, the driving assembly can adjust the height of the slide plate 19, and an arc shovel 21 is fixed to the front end of the slide plate 19.

[0059] Specifically, the driving assembly includes an adjusting cylinder 20 fixed on the fixed plate 18, the adjusting cylinder 20 is vertically arranged, and the telescopic end of the adjusting cylinder 20 is fixedly connected to the slide plate 19. The front end of the fixed plate 18 is provided with a plurality of vertical slide grooves 22, and the slide grooves 22 are all slidably engaged with sliders, and the sliders are fixedly connected to the slide plate 19.

[0060] When it is necessary to crush the hard rocks deposited at the lower end of the pipeline, the telescopic end of the upper cylinder 10 continues to move upward. When the telescopic end of the upper cylinder 10 contacts the upper end of the inner wall of the pipeline, the device is fixed in the pipeline. After the device is fixed in the pipeline, the reciprocating cylinder 17 is started. The reciprocating cylinder 17 can drive the fixed plate 18, the slide plate 19, the arc shovel 21 and the movable rod 16 to reciprocate, and then the reciprocating arc shovel 21 is used to impact and crush the hard rocks deposited in the lower end of the pipeline. By adjusting the cylinder 20, the height of the slide plate 19 and the arc shovel 21 can also be adjusted, thereby improving the cleaning effect of the hard rocks deposited in the lower end of the pipeline, and effectively impacting and crushing the hard rocks deposited close to the lower end of the inner wall of the pipeline.

[0061] Embodiment 2: Based on Embodiment 1, refer to Figures 1 - 4 As shown, a lower cylinder 11 is fixed at the lower end of the base 1, and the axial direction of the lower cylinder 11 is parallel to the travel direction of the base 1. An arc plate 12 is detachably fixedly connected to the telescopic end of the lower cylinder 11. A polished rod 14 corresponding to the support plate 2 is fixed on the arc plate 12, and the polished rod 14 passes through the support plate 2 on one side thereof, and the polished rod 14 is slidably connected to the support plate 2 on one side thereof.

[0062] Specifically, a connecting column 13 is fixed to the telescopic end of the lower cylinder 11, and a connecting bolt 15 passes through the arc plate 12 and is threadedly connected to the connecting column 13. A clearance hole 23 corresponding to the telescopic rod of the lower cylinder 11 is opened at the lower end of the fixing plate 18. The telescopic rod of the lower cylinder 11 can pass through the clearance hole 23 during the extension process.

[0063] Since the arc shovel 21 cannot move in the circumferential direction of the pipeline, in this embodiment, an arc plate 12 that can move in the axial direction of the pipeline is provided to further clean the deposited hard rocks remaining at the lower end of the inner wall of the pipeline.

[0064] After the arc-shaped shovel 21 impacts and breaks the deposited hard stones, the slide plate 19 and the arc-shaped shovel 21 move upward. Then, the lower cylinder 11 is activated, and the lower cylinder 11 drives the arc-shaped plate 12 to move towards the front side of the base 1 through the connecting column 13. During the process of the arc-shaped plate 12 moving towards the front side of the base 1, the arc-shaped plate 12 can scrape the residual deposited hard stones at the lower end of the inner wall of the pipeline. During the subsequent movement of the device in the pipeline, the arc-shaped plate 12 can also push the broken deposited hard stones to move until the broken deposited hard stones are pushed out of the pipeline.

[0065] Since the arc-shaped plate 12 and the connecting column 13 are connected by connecting bolts 15, arc-shaped plates 12 with different curvatures can be replaced according to the size of the pipeline to ensure that the outer edge of the arc-shaped plate 12 can be in sliding contact with the lower end of the inner wall of the pipeline during the movement of the device in the pipeline.

[0066] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for crushing hard stone deposits inside a drainage pipe, comprising a base (1), on which a rolling assembly is arranged, characterized in that: A crushing assembly is arranged at the front end of the base (1), and a stabilizing assembly is fixed at the upper end of the base (1); the crushing assembly comprises a reciprocating cylinder (17) fixed on the base (1), the axial direction of the reciprocating cylinder (17) is parallel to the moving direction of the base (1), a fixed plate (18) is fixed to the telescopic end of the reciprocating cylinder (17), a movable rod (16) is fixed on the fixed plate (18), the axis of the movable rod (16) is parallel to the axis of the reciprocating cylinder (17), the movable rod (16) is slidably connected to the base (1), a slide plate (19) is slidably arranged on the fixed plate (18), the slide plate (19) is connected to the fixed plate (18) through a driving assembly, the driving assembly can adjust the height of the slide plate (19), and an arc-shaped shovel (21) is fixed to the front end of the slide plate (19).

2. The device for crushing hard stone deposits in drainage pipes according to claim 1, characterized in that: The stabilizing assembly comprises an upper cylinder (10) fixed to the upper end of the base (1), the upper cylinder (10) being arranged vertically, a lifting plate (5) being fixed on the telescopic rod of the upper cylinder (10), the telescopic rod of the upper cylinder (10) penetrating the lifting plate (5), two sliding rods (6) being elastically slidably connected to the lifting plate (5), the two sliding rods (6) being arranged symmetrically about the axis of the upper cylinder (10), and a top wheel (7) being rotatably connected to the upper end of the sliding rod (6).

3. The device for crushing hard stone deposits in drainage pipes according to claim 2, characterized in that: The slide bar (6) passes through the lifting plate (5); a retaining ring (8) is fixed on the slide bar (6) above the lifting plate (5); a spring (9) is sleeved on the slide bar (6) between the retaining ring (8) and the lifting plate (5); the upper end of the spring (9) is fixedly connected to the retaining ring (8); and the lower end of the spring (9) is fixedly connected to the lifting plate (5).

4. The device for crushing hard stone deposits in drainage pipes according to claim 1, characterized in that: A lower cylinder (11) is fixed at the lower end of the base (1), the axial direction of the lower cylinder (11) is parallel to the moving direction of the base (1), and an arc plate (12) is detachably fixedly connected to the telescopic end of the lower cylinder (11).

5. The device for crushing hard stone deposits in drainage pipes according to claim 4, characterized in that: A connecting column (13) is fixed on the telescopic end of the lower cylinder (11), and a connecting bolt (15) penetrates the arc plate (12) and is threadedly connected to the connecting column (13).

6. A device for crushing hard stone deposits inside a drainage pipe according to claim 5, characterized in that: The rolling assembly comprises two support units, one of which is fixed at the front side of the base (1), and the other is fixed at the rear end of the base (1). The support unit comprises two support plates (2) which are symmetrically arranged on the left and right. The support plates (2) are fixedly connected to the base (1). A motor (4) is fixed on the support plate (2). A roller (3) is fixed on the output shaft of the motor (4). The stabilizing assembly is located between the two support units. A light rod (14) corresponding to the support plate (2) is fixed on the arc plate (12). The light rod (14) passes through the support plate (2) on one side thereof, and the light rod (14) is slidably connected to the support plate (2) on one side thereof.

7. The device for crushing hard stone deposits in drainage pipes according to claim 4, characterized in that: The lower end of the fixing plate (18) is provided with a clearance hole (23) corresponding to the telescopic rod of the lower cylinder (11).

8. The device for crushing hard stone deposits in drainage pipes according to claim 1, characterized in that: The front end of the fixed plate (18) is provided with a plurality of vertical sliding grooves (22), and sliding blocks are slidably engaged in the sliding grooves (22), and the sliding blocks are fixedly connected to the sliding plate (19).

9. The device for crushing hard stone deposits in drainage pipes according to claim 1, characterized in that: The driving assembly comprises an adjusting cylinder (20) fixed on a fixing plate (18), the adjusting cylinder (20) is arranged vertically, and the telescopic end of the adjusting cylinder (20) is fixedly connected to a sliding plate (19).

Citation Information

Patent Citations

  • Municipal pipeline dredging machine

    CN117569441A

  • Rain sewage pipeline dredging equipment

    CN117587916A

  • Drainage pipeline internal hard stone deposition crushing device

    CN213508866U

Cited By

  • Cleaning robot for gasification furnace and cleaning method

    CN120920451A