A slurry shield mud screening device

Abstract

This utility model belongs to the field of slurry shield tunneling excavation treatment technology, specifically relating to a slurry screening device for slurry shield tunneling. It includes a base frame, a conveyor belt mounted on the base frame, and conveying components for driving the conveyor belt. The conveyor belt is formed by hinged chain plates, with drainage holes on the chain plates. The base frame is inclined, and a mud inlet hopper is mounted on it. A slurry guide cylinder is mounted on the base frame, with a guide pipe connected to the rear of the slurry guide cylinder. An arc-shaped scraper and a rotating shaft are mounted on the base frame. The arc-shaped scraper is located in the area between the upper and lower chain plates, with the rotating shaft as its axis. An auger is fixedly mounted on the rotating shaft, with one end of the auger located inside the slurry guide cylinder. Rotation of the auger can transport the sludge accumulated in the arc-shaped scraper from the slurry guide cylinder. An installation groove is provided on the auger, and a cleaning brush is installed in the installation groove. The distance between the circumference of the auger and the lower chain plate is less than the depth of the cleaning brush. This device addresses the problems of low efficiency in excavation separation and easy clogging of screen plates in current slurry shield tunneling slurry screening equipment.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling slag treatment technology, specifically relating to a slurry screening device for slurry shield tunneling. Background Technology

[0002] During the tunneling process, the cutterhead of the tunnel boring machine (TBM) rotates to cut the soil. The cut soil and slurry in the slurry chamber are mixed and then transported to the slurry separation station on the ground by a slurry pump through pipeline. The soil and slurry are separated from the slurry and then recycled.

[0003] Because the slag in the mud has high viscosity, the current mud-water separation equipment is very prone to the screen plate being clogged with slag during the vibrating screening process. The mud cannot flow into the slurry storage tank, and a large amount of mud will flow into the slag yard through the clogged screen plate. In severe cases, it will flow outside the construction site, pollute the environment, affect traffic, and may even cause the tunnel boring machine to stop. Utility Model Content

[0004] Based on the problems mentioned in the background technology above, this utility model provides a slurry screening device for slurry shield tunneling machines, which solves the problems of low efficiency in separating slag and soil and easy clogging of screen plates when processing shield tunneling slurry in current slurry screening equipment.

[0005] The technical solution adopted in this utility model is as follows: A mud screening device for slurry shield tunneling includes a base frame, on which a conveyor belt and a conveying component for driving the conveyor belt are installed. The conveyor belt is formed by hinged chain plates, and drainage holes are provided on the chain plates. The base frame is inclined and has a mud inlet hopper. After the mud enters the mud inlet hopper, it is conveyed upward by the conveyor belt formed by the chain plates. During this process, the mud is discharged from the drainage holes. A slag guide cylinder is provided on the base frame, and a guide pipe is connected to the slag guide cylinder. An arc-shaped scraper and a rotating shaft are installed on the base frame. The rotating shaft is connected to the conveying component. The arc-shaped scraper is located in the area between the upper and lower chain plates with the rotating shaft as its axis. The bottom end of the arc-shaped scraper is close to the lower chain plate and is used to scrape the sludge that falls onto the lower chain plate from the drainage holes of the upper chain plate. An auger is fixedly installed on the rotating shaft, with one end of the auger located inside the sludge guide cylinder. As the arc-shaped scraper continuously scrapes, the sludge accumulates inside the arc-shaped scraper. The rotation of the auger transports the accumulated sludge inside the arc-shaped scraper to the sludge guide cylinder and then discharges it through the sludge discharge channel. The auger has an installation groove, in which a cleaning brush is installed. The distance between the circumference of the auger and the chain plate located below is less than the depth of the cleaning brush. When the cleaning brush contacts the chain plate, the bristles on the cleaning brush can penetrate deep into the drain hole for cleaning, preventing the drain hole from becoming clogged and affecting the filtration effect.

[0006] Based on the above technical solution, the present invention has made the following improvements: Furthermore, a slag guide cylinder is installed at one end of the base frame, and the conveyor belt is located inside the slag guide cylinder. A scraper is provided at the top of the slag guide cylinder near the lower chain plate. A guide pipe is located at the rear of the slag guide cylinder and connected to the sludge discharge channel. The scraper is located above the auger. Slag and mud lumps on the conveyor belt fall into the slag guide cylinder for discharge, and the scraper can also scrape off mud lumps adhering to the surface of the chain plate.

[0007] Furthermore, the base frame is provided with multiple rinsing grooves, which are located in the area between the upper and lower chain plates. During rinsing, water pipes can be inserted into the rinsing grooves to rinse the inner surface of the conveyor belt, which helps to improve the rinsing effect.

[0008] Furthermore, the outside of the slurry inlet hopper is covered with a rubber curtain to prevent slurry from overflowing when it is introduced into the hopper.

[0009] Furthermore, a baffle is installed at the top of the base frame, and a water-blocking plate is provided at the top of the baffle near the mud inlet hopper to prevent mud and water from overflowing from above the base frame.

[0010] Furthermore, adjacent chain plates are hinged together by hinge posts, and chain links are provided between adjacent hinge posts to form a chain. Rollers are installed at both ends of the chain plates on the hinge posts, and a slide rail is provided on the base frame. The rollers on the upper chain plates are located on the slide rail. The chain plates move on the slide rail via the rollers, which helps to improve the load-bearing capacity of the chain plates.

[0011] Furthermore, the base frame is equipped with a horizontal plate, on which a load-bearing plate is installed. The upper chain plate slides on the load-bearing plate. The load-bearing plate supports the chain plate, preventing it from bending or deforming under the pressure of large amounts of excavated soil.

[0012] Furthermore, a mud-receiving plate is installed below the base frame. This plate can collect the silt that falls from the lower chain plate, preventing the silt from scattering randomly and making it difficult to clean.

[0013] Furthermore, the base frame is equipped with a mounting frame, on which an axial flow fan is mounted. The axial flow fan is used to air-dry the separated slag, reducing its moisture content.

[0014] The beneficial effects of this utility model are: 1. After the slurry from the tunnel boring machine is introduced into the slurry bucket, the excavated soil falls onto the conveyor belt made of chain plates. As the conveyor belt moves, the excavated soil can be transported from low to high. During the transportation process, the slurry can flow out from the drainage hole while the excavated soil lumps remain on the surface of the chain plates, thereby achieving slurry-water separation. The slurry-water separation is rapid.

[0015] The arc-shaped scraper can scrape off the sludge that falls into the inner layer of the conveyor belt. The rotating auger can transport the sludge accumulated in the arc-shaped scraper to the sludge guide tube for discharge. At the same time, the cleaning brush can clean the chain plate, and the bristles on the cleaning brush can be inserted into the drain hole for cleaning, which can prevent the drain hole from being blocked by sludge and affecting the efficiency of mud-water separation. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of the structure of a slurry screening device for a slurry shield tunneling machine according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a slurry screening device for a slurry shield tunneling machine according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the base frame structure in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the conveyor belt structure in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the longitudinal section of a mud screening device for a slurry shield tunneling machine according to an embodiment of the present invention. Figure 7 for Figure 6 Enlarged structural diagram at point B; Figure 8 for Figure 7 Enlarged structural diagram at point C; The symbols for the main components are explained below: Base frame 1, baffle 10, drive shaft 11, first driven wheel 111, sprocket 12, chain 13, chain plate 14, drain hole 141, roller 142, chain link 143, cross plate 15, load-bearing plate 16, slide rail 161, flushing tank 17, slag guide cylinder 18, guide pipe 19, mud inlet hopper 2, water baffle 21, mounting frame 31, axial flow fan 32, motor mounting frame 33, drive motor 34, mud receiving plate 4, mud outlet channel 5, scraper 51, arc scraper 61, rotating shaft 62, auger 63, mounting groove 631, cleaning brush 64, second driven wheel 65, first transmission belt 71, second transmission belt 72. Detailed Implementation

[0017] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figures 1-2As shown, a mud screening device for a slurry shield tunnel includes a base frame 1, on which a conveyor belt and a conveying component for driving the conveyor belt are installed. The conveying component includes a drive motor 34. A motor mounting frame 33 is provided on the base frame 1, and the drive motor 34 is fixed on the motor mounting frame 33. The drive motor 34 drives the conveyor belt to move. The base frame 1 is inclined and a mud inlet hopper 2 is installed on the base frame 1. After the mud enters the mud inlet hopper 2, it can be conveyed upward by the conveyor belt formed by the chain plate 14. During this process, sewage is discharged from the drain hole 141 to separate mud and water.

[0019] like Figure 4 , Figure 5 As shown, the conveyor belt is formed by hinged chain plates 14, and drainage holes 141 are provided on the chain plates 14. Adjacent chain plates 14 are hinged together by hinge posts, and chain links 143 are provided between adjacent hinge posts to form a chain 13. Rollers 142 are installed at both ends of the chain plates 14 on the hinge posts. A slide rail 161 is provided on the base frame 1. The rollers 142 on the upper chain plates 14 are located on the slide rail 161. A drive shaft 11 and a driven shaft are installed on the base frame 1. Both the drive shaft 11 and the driven shaft are equipped with sprockets 12 that match the chain 13. The sprockets 12 are connected to the chain 13 for transmission. A first driven wheel 111 is installed on the drive shaft 11.

[0020] like Figure 2 , Figure 5 As shown, a slag guide cylinder 18 is provided on the base frame 1, and a guide pipe 19 is connected to the slag guide cylinder 18. An arc-shaped scraper 61 and a rotating shaft 62 are installed on the base frame 1. The rotating shaft 62 is connected to the conveying component for transmission. A first driving wheel and a second driven wheel 65 are installed on the rotating shaft 62. A first transmission belt 71 (e.g., ...) connects the driving wheel and the first driven wheel 65. Figure 5 As shown), a second drive wheel is mounted on the output shaft of the drive motor 34, and a second transmission belt 72 (as shown) connects the second drive wheel and the second driven wheel 65. Figure 1 (As shown).

[0021] like Figures 6-8 As shown, the arc-shaped scraper 61 is located in the area between the upper and lower chain plates 14 with the rotating shaft 62 as its axis. The bottom end of the arc-shaped scraper 61 is close to the lower chain plate 14 and is used to scrape out the silt (such as mud) that has fallen onto the lower chain plate 14 from the drainage hole 141 of the upper chain plate 14. Figure 7(As shown). An auger 63 is fixedly installed on the rotating shaft 62. One end of the auger 63 is located inside the sludge guide cylinder 18. As the arc-shaped scraper 61 continuously scrapes, the sludge will accumulate inside the arc-shaped scraper 61. The rotation of the auger 63 can transport the sludge accumulated inside the arc-shaped scraper 61 to the sludge guide cylinder 18 and then discharge it through the guide pipe 19. An installation groove 631 is provided on the auger 63, and a cleaning brush 64 is installed in the installation groove 631. The cleaning brush 64 is replaceable. The distance between the circumference of the auger 63 and the chain plate 14 located below is less than the depth of the cleaning brush 64. When the cleaning brush 64 contacts the chain plate 14, the bristles on the cleaning brush can penetrate into the drain hole 141 for cleaning, avoiding the drain hole 141 from being clogged and affecting the filtration effect.

[0022] Specifically, a mud discharge channel 5 is installed at one end of the base frame 1, and the other end of the conveyor belt is located inside the mud discharge channel 5. A scraper 51 is provided at the top of the mud discharge channel 5 near the lower chain plate 14. The scraper 51 is covered with a rubber layer, which contacts the chain plate 14 to reduce wear on the chain plate 14. The guide pipe 19 is connected to the mud discharge channel 5, and the slag and mud on the conveyor belt fall into the mud discharge channel 5 for discharge. The scraper 51 can also scrape the mud adhering to the surface of the chain plate 14 into the mud discharge channel 5. The scraper 51 is located in the auger 63. When the scraper 51 removes the mud adhering to the chain plate 14, the mud that enters the drainage hole 141 due to compression can be cleaned by the cleaning brush 64 on the auger 63 later.

[0023] Specifically, the base frame 1 is provided with multiple rinsing troughs 17. The rinsing troughs 17 are located in the area between the upper chain plate and the lower chain plate. During rinsing, water pipes can be inserted into the rinsing troughs 17 to rinse the inner surface of the conveyor belt, which helps to improve the rinsing effect. The rinsing water pipes can also be inserted into the rinsing troughs 17 above the arc-shaped scraper 61 to rinse the auger 63 and the cleaning brush 64.

[0024] Specifically, the outside of the mud hopper 2 is covered with a rubber curtain to prevent mud from overflowing when the slag and mud are introduced into the mud hopper 2.

[0025] Specifically, a baffle 10 is installed at the top of the base frame 1, and a water-blocking plate 21 is provided at the top of the baffle 10 near the mud inlet hopper 2 to prevent mud and water from overflowing from above the base frame 1.

[0026] Specifically, such as Figure 3 As shown, a horizontal plate 15 is provided on the base frame 1, and a load-bearing plate 16 is installed on the horizontal plate 15. The chain plate 14 located on the upper layer is slidably placed on the load-bearing plate 16. The load-bearing plate 16 can support the chain plate 14 and prevent the load-bearing plate 16 from bending and deforming when the amount of slag is large.

[0027] Specifically, a mud-receiving plate 4 is installed below the base frame 1 to collect silt falling from the lower chain plate 14, preventing the silt from scattering randomly and making it difficult to clean. When it is necessary to clean the mud-receiving plate 4, simply rinse it directly with a water pipe. like Figure 1 , Figure 2 As shown, the base frame 1 is equipped with an installation frame 31, and an axial flow fan 32 is installed on the installation frame 31. The axial flow fan 32 is used to air dry the separated slag and reduce the moisture content of the slag.

[0028] During operation, the slurry produced by the tunnel boring machine is fed into the slurry hopper 2. The excavated soil in the slurry falls onto the conveyor belt formed by the chain plate 14. The drive motor 34 drives the rotating shaft 62 and the auger 63 to rotate. The rotating shaft 62 drives the drive shaft 11 to rotate, which in turn drives the conveyor belt to move through the sprocket 12. The movement of the conveyor belt moves the excavated soil in the slurry hopper 2 upwards, and the slurry is discharged from the drainage hole 141. At the same time, the axial flow fan 32 can accelerate the slurry-water separation efficiency. The excavated soil moves with the chain plate 14 until it falls into the slurry discharge channel 5. At the same time, the scraper 51 on the slurry discharge channel 5 scrapes off the excavated soil adhering to the chain plate 14 for cleaning. The sludge that falls into the inner layer of the conveyor belt (i.e., the upper surface of the lower chain plate 14) from the drainage holes 141 is scraped off by the arc-shaped scraper 61. The rotating auger 63 can transport the sludge accumulated in the arc-shaped scraper 61 to the slag guide cylinder 18 and then fall into the sludge discharge channel 5 through the guide pipe 19. When the auger 63 rotates, the cleaning brush 64 cleans the chain plate 14. Since the distance between the circumference of the auger 63 and the lower chain plate 14 is less than the depth of the cleaning brush 64, the bristles of the cleaning brush 64 will extend into the drainage holes 141 to clean when in contact with the chain plate 14, thus preventing the sludge from clogging the drainage holes and affecting the drainage efficiency. When cleaning is required, the conveyor belt can be rinsed while it is in motion. The inner layer of the conveyor belt can also be rinsed by extending the rinsing water pipe into the rinsing tank 17.

[0029] The above provides a detailed description of the slurry screening device for slurry shield tunneling provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mud screening device for slurry shield tunneling, comprising a base frame (1), on which a conveyor belt and a conveying component for driving the conveyor belt are mounted, the conveyor belt being formed by hinged connection of several chain plates (14), and the chain plates (14) having drainage holes (141), characterized in that: The base frame (1) is inclined, and a mud inlet hopper (2) is installed on the base frame (1). A slag guide cylinder (18) is provided on the base frame (1), and a guide pipe (19) is connected to the slag guide cylinder (18). An arc-shaped scraper (61) and a rotating shaft (62) are installed on the base frame (1). The rotating shaft (62) is connected to the conveying component for transmission. The arc-shaped scraper (61) is located in the area between the upper and lower chain plates (14) with the rotating shaft (62) as its axis. 62) An auger (63) is fixedly installed on the auger (63). One end of the auger (63) is located inside the slag guide cylinder (18). The rotation of the auger (63) can transport the sludge accumulated in the arc scraper (61) to the slag guide cylinder (18). An installation groove (631) is provided on the auger (63). A cleaning brush (64) is installed in the installation groove (631). The distance between the circumference of the auger (63) and the chain plate (14) located on the lower layer is less than the depth of the cleaning brush (64).

2. A slurry shield mud screening device according to claim 1, wherein: The base frame (1) is equipped with a mud outlet channel (5) at one end, and the conveyor belt is located inside the mud outlet channel (5). The top of the mud outlet channel (5) is equipped with a scraper (51) near the lower chain plate (14). The scraper (51) is located above the auger (63). The guide pipe (19) is connected to the mud outlet channel (5).

3. A slurry shield mud screening device according to claim 2, wherein: The base frame (1) is provided with multiple rinsing grooves (17), which are located in the area between the upper chain plate and the lower chain plate.

4. A slurry shield mud screening device according to claim 3, wherein: The mud feed hopper (2) is covered with a rubber curtain.

5. A slurry shield mud screening device according to claim 4, wherein: A baffle (10) is installed at the top of the base frame (1), and a water-blocking plate (21) is provided at the top of the baffle (10) near the mud inlet hopper (2).

6. The slurry shield mud screening device according to claim 1, wherein: The adjacent chain plates (14) are hinged together by hinge posts, and chain links (143) are provided between the adjacent hinge posts to form a chain (13). Rollers (142) are installed at both ends of the chain plates (14) on the hinge posts. A slide rail (161) is provided on the base frame (1). The rollers (142) on the upper chain plates (14) are located on the slide rail (161).

7. A slurry shield mud screening device according to claim 6, wherein: The base frame (1) is provided with a horizontal plate (15), and a load-bearing plate (16) is installed on the horizontal plate (15). The chain plate (14) located on the upper layer is slidably placed on the load-bearing plate (16).

8. The slurry shield mud screening device according to claim 1, wherein: A mud-receiving plate (4) is installed below the base frame (1).

9. The slurry shield mud screening device of claim 1, wherein: The base frame (1) is provided with a mounting frame (31), and an axial flow fan (32) is mounted on the mounting frame (31).

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