Shovel and brush separation type I-shaped steel joint cleaning device driven by rotary drilling rig

Abstract

The utility model discloses a shovel brush separation type I-shaped steel joint cleaning device driven by a rotary digging drill, which comprises a wall brushing device main body, a wall brushing structure and a wall shoveling structure, the wall brushing structure and the wall shoveling structure are respectively and correspondingly welded on two sides of the wall brushing device main body, and the wall brushing device main body is made of a drill bit of the rotary digging drill or a hole drill. The wall shoveling structure comprises a wall shoveling connecting base, a lower wall shoveling plate and an upper wall shoveling plate, the lower wall shoveling plate and the upper wall shoveling plate are fixedly connected with the wall brushing device body through the wall shoveling connecting base, and the lower wall shoveling plate and the upper wall shoveling plate are arranged in parallel in an up-down structure. According to the shovel-brush separation type I-shaped steel joint cleaning device driven by the rotary drilling rig, the design that a shovel wall structure and a brush wall structure are separated is adopted, hard objects can be effectively shoveled firstly, then fine-grain impurities are brushed away, cleaning of an I-shaped steel joint is more thorough, the cleanliness of the joint part in underground diaphragm wall construction is guaranteed, and the construction quality is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm wall construction, specifically a rotary drilling-driven, shovel-brush separation type I-beam joint cleaning device. Background Technology

[0002] Most subway station retaining structures utilize diaphragm walls. Diaphragm wall construction employs hydraulic grab excavation equipment, excavating narrow trenches according to pre-defined sections, then pouring concrete. Finally, multiple sections of diaphragm wall are connected to form a single concrete diaphragm wall. The connection point between any two adjacent diaphragm walls is called a diaphragm wall joint, typically an I-beam joint. Its main function is to fill the outside of the I-beam with sandbags after the reinforcing cage is lowered into the trench, preventing concrete from flowing around the joint during diaphragm wall pouring. The quality and efficiency of the plastering at the I-beam joints directly affect the overall effect and construction progress of the diaphragm wall.

[0003] Domestic researchers have proposed several solutions, but most involve using cranes and impact drills to suspend the wall-cleaning device, keeping the brush head close to the web of the I-beam being cleaned, and repeatedly lifting and lowering it to remove the sludge from the joints of the diaphragm wall. The steel wire rope, being a flexible component, easily causes the wall-cleaning device to tilt, affecting the cleaning effect; furthermore, most wall-cleaning devices are flexible steel wire brushes, which are difficult to effectively remove hard objects and fine impurities at the joints. Therefore, people have developed wall-cleaning devices that combine rigidity and flexibility, for example:

[0004] 1. Chinese Patent: A wall brush and rotary drilling machine for diaphragm walls, Application No.: 201922312239.3, Application Date: 2019.12.20, Abstract: This utility model provides a wall brush and rotary drilling machine for diaphragm walls, including: a wall brush body (1); a brush assembly connected to one side of the wall brush body (1); multiple steel shovel teeth (5) connected to the other side of the wall brush body (1); and a device connector (7) for use with a power equipment installed on the top of the wall brush body (1). This utility model proposes a new wall brush for diaphragm walls. Since the wall brush can use the steel shovel teeth to clean hard soil clods, mud, and other hard materials on the diaphragm wall, and can also use the steel brush strips to clean the residual flexible filler and flexible filler woven bags on the diaphragm wall, it can avoid the need for too many types of wall brushes. The rotary drilling machine of this invention ensures the brushing force of the wall brusher, and the wall brusher of this invention has strong functionality, thereby improving the brushing efficiency and ensuring the construction quality of the diaphragm wall.

[0005] 2. Chinese Patent: Multifunctional Scraper Wall Brush for I-beam Joint of Diaphragm Wall, Application No.: 202420262419.3, Application Date: 2024.02.02, Abstract: This utility model relates to the field of diaphragm wall construction technology and discloses a multifunctional scraper wall brush for I-beam joint of diaphragm wall, including a joint square tube, the top of which is provided with a connection interface. This invention utilizes a universal rotary drilling rig connector square tube, enabling quick and convenient installation and disassembly. The rotary drilling rig can be raised and lowered rapidly, with a high wall-brushing frequency. The drill rod of the rotary drilling rig itself has high rigidity, and the wall-brushing device, aided by the rotary drilling rig, has strong scouring force, effectively removing concrete blocks. Simultaneously, the wire brush is welded and fixed to the wall-brushing tube, providing good stability and high rigidity. Furthermore, the alternating scraping of the bucket teeth and the wire brush ensures thorough wall-brushing, resulting in excellent cleaning effects. By using a rotary drilling rig connector square tube connected and fixed to the rotary drilling rig drill rod, the wall-brushing device can be reused, eliminating the need for other equipment and saving on mechanical investment costs for the project.

[0006] 3. Chinese Patent: Wall Brusher, Application No.: 201820727042.9, Application Date: 2018.05.16, Abstract: This utility model discloses a wall brusher, comprising a wall brusher body; a flexible joint brush part connected to one side of the wall brusher body, used for brushing the flexible joints of diaphragm walls; and a rigid joint brush part connected to the other side of the wall brusher body and arranged opposite to the flexible joint brush part, used for brushing the rigid joints of diaphragm walls. This wall brusher can improve brushing efficiency to ensure the construction quality of diaphragm walls.

[0007] Application research revealed that the rigid brush section of the aforementioned wall scrubber, with its spade-like structure, is prone to missing areas during scrubbing, resulting in poor cleaning performance. Therefore, it is necessary to redesign and improve the cleaning device using an I-beam joint. Summary of the Invention

[0008] The purpose of this invention is to address the problems existing in the prior art by providing a rotary drilling rig-driven, shovel-brush separated cleaning device for I-beam joints. This rotary drilling rig-driven, shovel-brush separated cleaning device for I-beam joints adopts a separate design of shovel wall structure and brush wall structure, which can effectively remove hard objects first and then brush away fine impurities, making the cleaning of I-beam joints more thorough, ensuring the cleanliness of the joint area during diaphragm wall construction, and helping to improve construction quality.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A rotary drilling rig-driven, shovel-and-brush detachable I-beam joint cleaning device includes a brush body, a brush structure, and a shovel structure. The brush structure and shovel structure are welded to opposite sides of the brush body. The brush body is made from a rotary drilling rig bit or a hole drill, which are commercially available finished products that can be connected to the lower pin of the rotary drilling rig's drill rod and are detachable. The shovel structure includes a shovel connecting base, a lower shovel plate, and an upper shovel plate. The lower and upper shovel plates are fixedly connected to the brush body via the shovel connecting base and are arranged in parallel, vertically. The cleaning device is connected to the lower pin of the rotary drilling rig's drill rod via the brush body. The rotary drilling rig moves up and down repeatedly, using the shovel structure to remove hard concrete from the I-beam. Then, a winch lifts the drill rod and rotates it 180°, using the steel brush of the brush structure to remove fine impurities.

[0011] A further preferred embodiment: the scraping ends of the lower and upper shovel plates are machined with cutting edges to remove hard concrete debris.

[0012] A further preferred embodiment: the shovel wall connecting base includes a shovel wall intermediate connecting plate and two shovel wall connecting base plates. The two shovel wall connecting base plates are respectively welded to both ends of one side of the shovel wall intermediate connecting plate to form a groove structure. The lower shovel wall plate and the upper shovel wall plate are connected to the other side of the shovel wall intermediate connecting plate.

[0013] A further preferred embodiment: the shovel wall connecting base plate is provided with a bevel for welding to the brush body. The connection position between the shovel wall connecting base plate and the intermediate connecting plate of the shovel wall, as well as the bevel, are determined according to the curvature of the brush body.

[0014] A further preferred embodiment: The lower shovel wall panel and the upper shovel wall panel are connected to the intermediate shovel wall connecting plate via a shovel wall connecting plate. The lower and upper shovel wall panels are welded and fixed to one side of the shovel wall connecting plate in a parallel, vertical structure. The shovel wall connecting plate and the intermediate shovel wall connecting plate are respectively provided with mounting holes, and are fixedly connected by shovel wall connecting plate fixing bolts. The connection between the lower and upper shovel wall panels via the shovel wall connecting plate and the intermediate shovel wall connecting plate facilitates partial replacement. When a shovel wall panel needs to be replaced, the shovel wall connecting plate can be disassembled and replaced with a new shovel wall connecting plate and the shovel wall panel; there is no need to cut and replace the shovel wall connecting base.

[0015] A further preferred embodiment: the brush wall structure includes steel brushes and a brush wall connecting base, wherein multiple bundles of steel brushes are fixedly connected to the brush wall device body through the brush wall connecting base.

[0016] A further preferred embodiment: the brush wall connecting base includes a brush wall intermediate connecting plate and two brush wall connecting base plates. The two brush wall connecting base plates are respectively welded to both ends of one side of the brush wall intermediate connecting plate to form a groove structure, and the steel brush is connected to the other side of the brush wall intermediate connecting plate.

[0017] A further preferred embodiment: the brush wall connecting base plate is provided with a bevel for welding to the brush wall body. The connection position between the brush wall connecting base plate and the intermediate connecting plate of the brush wall, as well as the bevel, are determined according to the curvature of the brush wall body.

[0018] A further preferred embodiment: the intermediate connecting plate of the brush wall has multiple steel brush connection holes larger than the steel brush, the steel brush is composed of one or more of steel bristles, waste steel wire rope, and steel strand, one end of the steel brush passes through the steel brush connection hole, and the connection part between the steel brush and the steel brush connection hole is reinforced by welding.

[0019] A further preferred embodiment: The steel brush is connected to the intermediate connecting plate of the brush wall via a brush wall connecting plate. The brush wall connecting plate has multiple connecting holes larger than the steel brush itself. The steel brush is composed of one or more of the following: steel bristles, scrap steel wire rope, and steel strand. One end of the steel brush is welded and fixed to the connecting hole. The brush wall connecting plate and the intermediate connecting plate have corresponding mounting holes and are fixedly connected by brush wall connecting plate fixing bolts. The connection between the steel brush and the intermediate connecting plate facilitates partial replacement. When the steel brush needs to be replaced, the brush wall connecting plate can be disassembled and replaced with a new one and a new steel brush; there is no need to cut or replace the brush wall connecting base.

[0020] This rotary drilling rig-driven, brush-separable I-beam joint cleaning device has the following advantages:

[0021] 1. The rotary drilling rig-driven shovel-brush separated I-beam joint cleaning device can improve cleaning efficiency: Through the separate design of the shovel wall structure and the brush wall structure, different types of impurities can be cleaned sequentially, avoiding the inefficiency that may occur when cleaning different impurities at the same time, and improving the overall cleaning efficiency.

[0022] 2. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device enhances the cleaning effect: the combination of the shovel wall structure and the brush wall structure can first remove hard objects and then treat fine impurities, making the cleaning of the I-beam joint more thorough, ensuring the cleanliness of the joint area during diaphragm wall construction, and helping to improve the construction quality.

[0023] 3. The rotary drilling rig-driven, detachable brush head cleaning device for I-beam joints facilitates brush head replacement: The detachable brush head design allows the rotary drilling rig to quickly replace the brush head according to different cleaning needs, extending the service life of the device and reducing operating costs. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the structure of a rotary drilling rig driven, shovel-brush separated I-beam joint cleaning device;

[0025] Figure 2 is a schematic diagram of the shovel wall structure;

[0026] Figure 3 is a schematic diagram of the second shovel wall structure;

[0027] Figure 4 This is a schematic diagram of a brush wall structure;

[0028] Figure 5 This is a schematic diagram of the second brush wall structure;

[0029] Figure 6 is a schematic diagram of the connection between the wall brushing device body and the rotary drilling rig;

[0030] The names corresponding to the serial numbers in the figure are:

[0031] 1. Wall brush body; 2. Wall brush structure; 3. Wall scraping structure; 4. Lower scraper wall plate; 5. Upper scraper wall plate; 6. Scraper wall connecting plate fixing bolts; 7. Scraper wall connecting plate; 8. Scraper wall intermediate connecting plate; 9. Scraper wall connecting base plate; 10. Bevel; 11. Wall brush connecting base plate; 12. Wall brush connecting plate fixing bolts; 13. Wall brush intermediate connecting plate; 14. Wall brush connecting plate; 15. Steel brush; 16. Steel brush connecting orifice; 17. Rotary drilling rig; 18. I-beam. Detailed Implementation

[0032] To provide a more detailed description of this utility model, the following description, in conjunction with the embodiments and accompanying drawings, will further illustrate this utility model.

[0033] Example 1

[0034] A rotary drilling rig-driven, shovel-and-brush separated I-beam joint cleaning device includes a brush body 1, a brush structure 2, and a shovel structure 3. The brush structure 2 and the shovel structure 3 are respectively welded to both sides of the brush body 1. The brush body 1 is made of a rotary drilling rig bit or a hole drill, which are commercially available finished products that can be connected to the lower pin of the drill rod of the rotary drilling rig 17 and have a detachable feature. The shovel structure 3 includes a shovel connecting base, a lower shovel plate 4, and an upper shovel plate 5. The lower shovel plate 4 and the upper shovel plate 5 are fixedly connected to the brush body 1 through the shovel connecting base, and the lower shovel plate 4 and the upper shovel plate 5 are arranged in parallel with each other in an upper and lower structure. The cleaning device is connected to the lower part of the drill rod of the rotary drilling rig 17 via the wall brush body 1; the hard concrete on the I-beam 18 is removed by repeatedly moving the rotary drilling rig 17 up and down and using the wall scraper structure 3; then the winch lifts the drill rod and rotates it 180°, and the steel brush 15 of the wall brush structure 2 is used to brush away fine impurities.

[0035] The scraping ends of the lower shovel wall plate 4 and the upper shovel wall plate 5 are machined with cutting edges to remove hard concrete debris.

[0036] The shovel wall connecting base includes a shovel wall intermediate connecting plate 8 and two shovel wall connecting base plates 9. The two shovel wall connecting base plates 9 are respectively welded to one side of the shovel wall intermediate connecting plate 8 at both ends to form a groove structure. The lower shovel wall plate 4 and the upper shovel wall plate 5 are connected to the other side of the shovel wall intermediate connecting plate 8.

[0037] The shovel wall connecting base plate 9 is provided with a bevel 10 for welding to the brush body 1. The connection position between the shovel wall connecting base plate 9 and the intermediate connecting plate 8 of the shovel wall, as well as the bevel 10, are determined according to the curvature of the brush body 1.

[0038] The brush structure 2 includes steel brushes 15 and a brush connection base. Multiple bundles of steel brushes 15 are fixedly connected to the brush body 1 through the brush connection base.

[0039] The brush wall connecting base includes a brush wall intermediate connecting plate 13 and two brush wall connecting base plates 11. The two brush wall connecting base plates 11 are respectively welded to one side of the brush wall intermediate connecting plate 13 at both ends to form a groove structure. The steel brush 15 is connected to the other side of the brush wall intermediate connecting plate 13.

[0040] The brush wall connecting base plate 11 is provided with a bevel 10 for welding to the brush wall body 1. The connection position between the brush wall connecting base plate 11 and the brush wall intermediate connecting plate 13, as well as the bevel 10, are determined according to the curvature of the brush wall body 1.

[0041] The brush wall intermediate connecting plate 13 has multiple steel brush connection holes 16 larger than the steel brush 15. The steel brush 15 is composed of one or more of steel brushes, waste steel wire ropes, and steel strands. One end of the steel brush 15 passes through the steel brush connection hole 16, and the connection part between the steel brush 15 and the steel brush connection hole 16 is reinforced by welding.

[0042] Example 2

[0043] A rotary drilling rig-driven, shovel-and-brush separated I-beam joint cleaning device includes a brush body 1, a brush structure 2, and a shovel structure 3. The brush structure 2 and the shovel structure 3 are respectively welded to both sides of the brush body 1. The brush body 1 is made of a rotary drilling rig bit or a hole drill, which are commercially available finished products that can be connected to the lower pin of the drill rod of the rotary drilling rig 17 and have a detachable feature. The shovel structure 3 includes a shovel connecting base, a lower shovel plate 4, and an upper shovel plate 5. The lower shovel plate 4 and the upper shovel plate 5 are fixedly connected to the brush body 1 through the shovel connecting base, and the lower shovel plate 4 and the upper shovel plate 5 are arranged in parallel with each other in an upper and lower structure. The cleaning device is connected to the lower part of the drill rod of the rotary drilling rig 17 via the wall brush body 1; the hard concrete on the I-beam 18 is removed by repeatedly moving the rotary drilling rig 17 up and down and using the wall scraper structure 3; then the winch lifts the drill rod and rotates it 180°, and the steel brush 15 of the wall brush structure 2 is used to brush away fine impurities.

[0044] The scraping ends of the lower shovel wall plate 4 and the upper shovel wall plate 5 are machined with cutting edges to remove hard concrete debris.

[0045] The shovel wall connecting base includes a shovel wall intermediate connecting plate 8 and two shovel wall connecting base plates 9. The two shovel wall connecting base plates 9 are respectively welded to one side of the shovel wall intermediate connecting plate 8 at both ends to form a groove structure. The lower shovel wall plate 4 and the upper shovel wall plate 5 are connected to the other side of the shovel wall intermediate connecting plate 8.

[0046] The shovel wall connecting base plate 9 is provided with a bevel 10 for welding to the brush body 1. The connection position between the shovel wall connecting base plate 9 and the intermediate connecting plate 8 of the shovel wall, as well as the bevel 10, are determined according to the curvature of the brush body 1.

[0047] The lower shovel wall plate 4 and the upper shovel wall plate 5 are connected to the middle shovel wall connecting plate 8 via the shovel wall connecting plate 7. The lower shovel wall plate 4 and the upper shovel wall plate 5 are welded and fixed to one side of the shovel wall connecting plate 7 in a parallel upper and lower structure. The shovel wall connecting plate 7 and the middle shovel wall connecting plate 8 are respectively provided with mounting holes. The shovel wall connecting plate 7 and the middle shovel wall connecting plate 8 are fixedly connected by the shovel wall connecting plate fixing bolts 6.

[0048] The brush structure 2 includes steel brushes 15 and a brush connection base. Multiple bundles of steel brushes 15 are fixedly connected to the brush body 1 through the brush connection base.

[0049] The brush wall connecting base includes a brush wall intermediate connecting plate 13 and two brush wall connecting base plates 11. The two brush wall connecting base plates 11 are respectively welded to one side of the brush wall intermediate connecting plate 13 at both ends to form a groove structure. The steel brush 15 is connected to the other side of the brush wall intermediate connecting plate 13.

[0050] The brush wall connecting base plate 11 is provided with a bevel 10 for welding to the brush wall body 1. The connection position between the brush wall connecting base plate 11 and the brush wall intermediate connecting plate 13, as well as the bevel 10, are determined according to the curvature of the brush wall body 1.

[0051] The steel brush 15 is connected to the intermediate connecting plate 13 of the brush wall via a brush wall connecting plate 14. The brush wall connecting plate 14 has multiple steel brush connection holes 16 larger than the steel brush 15. The steel brush 15 is composed of one or more of steel brushes, waste steel wire ropes, and steel strands. One end of the steel brush 15 is welded and fixed to the steel brush connection hole 16. The brush wall connecting plate 14 and the intermediate connecting plate 13 are provided with corresponding mounting holes. The brush wall connecting plate 14 and the intermediate connecting plate 13 are fixedly connected by brush wall connecting plate fixing bolts 12.

[0052] This rotary drilling rig-driven, detachable scraper-brush type I-beam joint cleaning device connects to the lower end of the rotary drilling rig's drill rod. Utilizing the repetitive up-and-down movement of the drill rod, it drives a scraping mechanism to remove hard concrete. First, the scraper structure removes the hard concrete. Then, the drill rod is lifted and rotated 180° to switch to the brush structure for subsequent fine soil brushing. The brush unit is rigidly connected to the drill rod, increasing friction between the brush structure and the contact surface. Simultaneous scraping with both the lower and upper scraper plates ensures effective cleaning. Furthermore, the brush unit is detachable, allowing the rotary drilling rig to be replaced according to specific construction procedures, improving the device's applicability and flexibility.

[0053] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A rotary drilling rig-driven, shovel-and-brush separated H-beam joint cleaning device, comprising a brush body (1), a brush structure (2), and a shovel structure (3), wherein the brush structure (2) and the shovel structure (3) are respectively welded to both sides of the brush body (1), characterized in that: The main body (1) of the wall brusher is made by rotary drilling bit or hole drilling. The wall shovel structure (3) includes a wall shovel connecting base, a lower wall shovel plate (4) and an upper wall shovel plate (5). The lower wall shovel plate (4) and the upper wall shovel plate (5) are fixedly connected to the main body (1) of the wall brusher through the wall shovel connecting base. The lower wall shovel plate (4) and the upper wall shovel plate (5) are arranged in parallel with each other in an upper and lower structure.

2. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 1, characterized in that: The scraping ends of the lower scraper plate (4) and the upper scraper plate (5) are machined with cutting edges to remove hard concrete debris.

3. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 1, characterized in that: The shovel wall connecting base includes a shovel wall intermediate connecting plate (8) and two shovel wall connecting base plates (9). The two shovel wall connecting base plates (9) are respectively welded to one side of the shovel wall intermediate connecting plate (8) and combined to form a groove structure. The lower shovel wall plate (4) and the upper shovel wall plate (5) are connected to the other side of the shovel wall intermediate connecting plate (8).

4. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 3, characterized in that: The shovel wall connecting base plate (9) is provided with a bevel (10) for welding to the wall brush body (1).

5. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 3, characterized in that: The lower shovel wall plate (4) and the upper shovel wall plate (5) are connected to the middle shovel wall connecting plate (8) through the shovel wall connecting plate (7). The lower shovel wall plate (4) and the upper shovel wall plate (5) are welded and fixed to one side of the shovel wall connecting plate (7) in a parallel structure. The shovel wall connecting plate (7) and the middle shovel wall connecting plate (8) are respectively provided with mounting holes. The shovel wall connecting plate (7) and the middle shovel wall connecting plate (8) are fixedly connected by the shovel wall connecting plate fixing bolts (6).

6. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 1, characterized in that: The brush wall structure (2) includes a steel brush (15) and a brush wall connecting base. Multiple bundles of steel brushes (15) are fixedly connected to the brush wall body (1) through the brush wall connecting base.

7. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 6, characterized in that: The brush wall connection base includes a brush wall intermediate connection plate (13) and two brush wall connection base plates (11). The two brush wall connection base plates (11) are respectively welded to one side of the brush wall intermediate connection plate (13) and combined to form a groove structure. The steel brush (15) is connected to the other side of the brush wall intermediate connection plate (13).

8. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 7, characterized in that: The brush wall connecting base plate (11) is provided with a bevel (10) for welding to the brush wall body (1).

9. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 7, characterized in that: The brush wall intermediate connecting plate (13) has multiple steel brush connection holes (16) larger than the steel brush (15). The steel brush (15) is composed of one or more of steel brush, waste steel wire rope, and steel strand. One end of the steel brush (15) passes through the steel brush connection hole (16). The connection between the steel brush (15) and the steel brush connection hole (16) is reinforced by welding.

10. The rotary drilling rig-driven, shovel-brush separated I-beam joint cleaning device according to claim 7, characterized in that: The steel brush (15) is connected to the brush wall intermediate connecting plate (13) through the brush wall connecting plate (14). The brush wall connecting plate (14) has multiple steel brush connection holes (16) larger than the steel brush (15). The steel brush (15) is composed of one or more of steel brush, waste steel wire rope, and steel strand. One end of the steel brush (15) is welded and fixed to the steel brush connection hole (16). The brush wall connecting plate (14) and the brush wall intermediate connecting plate (13) are respectively provided with mounting holes. The brush wall connecting plate (14) and the brush wall intermediate connecting plate (13) are fixedly connected by brush wall connecting plate fixing bolts (12).

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