Tower crane with steel tube bundle shear wall structure

Through the fixing method of steel pipe bundle shear wall structure and telescopic arm, combined with the design of steel wire, filter mesh, electric push rod, support pad and scraper, the problems of shaking and insufficient load bearing of tower cranes under the influence of wind are solved, and the tower cranes are improved The stability and construction efficiency of the tower reduce the risk of accidents.

CN222249822UActive Publication Date: 2024-12-27CHINA FIRST HIGHWAY ENGINEERING CO LTD +1
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Patent Information

Application Number
CN202421173853.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2024-12-27
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

Tower cranes are easily affected by wind during construction, causing shaking or tilting, which increases the risk of construction accidents and insufficient load-bearing capacity, affecting construction efficiency.

Method used

Adopt steel pipe bundle shear wall structure to improve tower stability through the fixing method of the first and second telescopic arms, increase fixing points and fixing area, use steel wire for buffering and cleaning, filter screen blocks concrete impurities, and electric push rod provides additional Support, support pads adapt to uneven ground, and scrapers clean surface impurities.

Benefits of technology

Effectively reduce the shaking or inclination of the tower under wind, improve stability and load-bearing capacity, reduce accident risks, improve construction efficiency and safety, and adapt to buildings of different heights and structures.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a tower crane with a steel tube bundle shear wall structure, which comprises a tower. A fixing frame is mounted in the middle of the tower; a plurality of groups of first bolts are fixedly connected to the side wall of the fixing frame; the middle of the first bolt is in threaded connection with the tower, and two first fixing plates are fixedly connected to the side wall of the fixing frame. The two first fixing plates form a group; the two groups of first fixing plates are oppositely arranged; a first telescopic arm is hinged to the middle of the first fixing plate. A connecting plate is hinged to the end parts of the two first telescopic arms; the middle part of the connecting plate is in threaded connection with multiple groups of second bolts; the connecting plate is mounted on one side of the shear wall body; two second telescopic arms are hinged to the side wall of the connecting plate; by means of the mode that the first telescopic arm and the second telescopic arm are fixed, the tower can be effectively made to have higher stability during operation, and shaking or inclining generated when the tower works under large wind force can be effectively reduced.
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Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, in particular to a tower crane with a steel tube bundle shear wall structure. Background Art

[0002] A tower crane is a rotating crane with a boom mounted on the top of a tall tower. Tower cranes are mainly used for horizontal and vertical transportation of materials and installation of building components in house construction.

[0003] Tower cranes are mainly composed of three parts: metal structure, working mechanism and electrical system. Tower cranes are lifting machinery that lifts heavy objects or lifts and moves them through a lifting hook or other picking devices. Lifting machinery includes the steps of lifting, running, lowering and returning to the original position. The lifting mechanism lifts the heavy object from the picking point through the picking device, moves the heavy object through running, rotating or luffing mechanism, and returns to the original position after dropping the heavy object to the designated position.

[0004] During the construction process of tower cranes, high-altitude operations are prone to encounter strong winds. Under the influence of strong winds, the tower crane's tower body may shake or tilt while working, which may easily lead to the risk of construction accidents.

[0005] To this end, the utility model provides a tower crane with a steel tube bundle shear wall structure. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a steel tube bundle shear wall structure tower crane described in the utility model comprises a tower; a fixing frame is installed in the middle of the tower; a plurality of first bolts are fixedly connected to the side wall of the fixing frame; the middle of the first bolt is threadedly connected to the tower, and two groups of first fixing plates are fixedly connected to the side wall of the fixing frame; two first fixing plates form a group; the two groups of first fixing plates are arranged oppositely; a first telescopic arm is hinged in the middle of the first fixing plate; a connecting plate is hinged at the ends of the two first telescopic arms; a plurality of second bolts are threadedly connected in the middle of the connecting plate; the connecting plate is installed on one side of the shear wall body; two second telescopic arms are hinged on the side wall of the connecting plate; the two second telescopic arms are arranged oppositely ; A second fixing plate is hingedly connected to the end of the second telescopic arm; a third bolt is threadedly connected to the middle of the second fixing plate; the way of fixing the first telescopic arm and the second telescopic arm can effectively make the tower have higher stability during operation, and can adapt to buildings of different heights and structures, and the installation and disassembly process is also relatively convenient, which can effectively reduce the shaking or tilting of the tower when working under strong wind force, effectively reduce the problem of reduced safety due to shaking or tilting, effectively reduce construction accidents of the tower during construction, and can disperse the fixing points and increase the fixing area by the first telescopic arm and the second telescopic arm, which can effectively improve the load-bearing capacity of the tower, enable the tower to handle heavier loads, and effectively improve construction efficiency.

[0008] Preferably, a plurality of groups of connecting frames are installed in the middle part of the first telescopic arm; every two of the connecting frames form a group, and two first screws are threadedly connected to the ends of the two opposite connecting frames; the two first screws are arranged oppositely; a nut is threadedly connected to the middle part of the first screw; two steel rods are fixedly connected to the middle part of the connecting frame; the steel rods are arranged obliquely; steel wires are fixedly connected to the ends of the two steel rods; the steel wires can effectively reduce the accidental contact of objects with the first telescopic arm or the second telescopic arm, and effectively reduce the accidental collision of mechanical equipment or building materials with the first telescopic arm or the second telescopic arm during the construction process; the steel wires can buffer the collision of objects with the first telescopic arm or the second telescopic arm, and effectively reduce the damage to the first telescopic arm or the second telescopic arm; the steel wires are not easily damaged during use and can be easily cleaned and replaced, thereby effectively improving the safety of the construction process.

[0009] Preferably, a fixed rod is slidably connected to the middle part of the steel wire; a filter is fixedly connected to the side walls of the fixed rod close to each other; the filter can effectively block concrete impurities in the construction process, effectively reduce the accumulation of concrete impurities on the first telescopic arm or the second telescopic arm, effectively reduce the problem of concrete impurities scattered on the first telescopic arm or the second telescopic arm being difficult to remove, and effectively reduce the corrosion and damage of the first telescopic arm or the second telescopic arm caused by long-term accumulation, effectively increasing the reliability and cleanliness of the construction.

[0010] Preferably, two electric push rods are fixedly connected to the bottom of the second telescopic arm; the two electric push rods are fixedly connected near the end of the second telescopic arm; the two electric push rods are arranged opposite to each other; the output ends of the electric push rods are fixedly connected to a support plate; the electric push rods can provide additional support for the second telescopic arm, effectively increasing the stability of the second telescopic arm during the fixing process, and the electric push rods and the support plate can make the connection between the second telescopic arm and the shear wall body tighter and more firmly, thereby effectively improving the construction quality of the entire structure, and being able to effectively adapt to different environments, thereby effectively improving the construction quality and construction safety.

[0011] Preferably, a groove is provided at the bottom of the support plate; a second screw is threadedly connected to the middle of the support plate; a support pad is rotatably connected to the end of the second screw; the support pad is arranged at the corresponding groove position; when the second screw is used to support an uneven ground, the support plate can be better fitted to the ground by adjusting the length of the second screw, thereby effectively reducing the problem of shaking or tilting caused by the uneven ground when the support plate supports the second telescopic arm, and can effectively make the support plate fit closely to the ground, reducing additional stress and wear during operation.

[0012] Preferably, a plurality of groups of support rods are fixedly connected to the middle part of the first telescopic arm; a plurality of groups of support rods are fixedly connected to one end of the connection of the first telescopic arm; a plurality of groups of support rods are fixedly connected to the middle part of the second telescopic arm; a plurality of groups of support rods are fixedly connected to one end of the connection of the second telescopic arm; a scraper is fixedly connected to the middle part of the support rod; the scraper can effectively clean the surfaces of the first telescopic arm and the second telescopic arm, effectively reduce the problem of impurities and residues on the surfaces of the first telescopic arm and the second telescopic arm causing the reduction of telescopic performance, effectively reduce the blockage or damage at the connection in the middle part of the first telescopic arm and the second telescopic arm, effectively reduce the dust and impurities entering the first telescopic arm and the second telescopic arm to cause wear or resistance, and make the telescopic operation smoother.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The steel tube bundle shear wall structure tower crane described in the utility model can effectively make the tower have higher stability during operation by fixing the first telescopic arm and the second telescopic arm, and can adapt to buildings of different heights and structures, and the installation and disassembly process is also relatively convenient, which can effectively reduce the shaking or tilting of the tower when working under strong wind force, effectively reduce the problem of reduced safety due to shaking or tilting, and effectively reduce construction accidents caused by the tower during construction.

[0015] 2. The steel tube bundle shear wall structure tower crane described in the utility model can effectively reduce the accidental contact of objects with the first telescopic arm or the second telescopic arm through the steel wire, effectively reduce the accidental collision of mechanical equipment or building materials with the first telescopic arm or the second telescopic arm during the construction process, and can cushion the collision of objects with the first telescopic arm or the second telescopic arm through the steel wire, effectively reducing the damage to the first telescopic arm or the second telescopic arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a three-dimensional diagram of a tower crane with a steel tube bundle shear wall structure in the utility model;

[0018] Figure 2 It is a structural schematic diagram of the fixing frame in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the connecting plate in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the second screw in the utility model;

[0021] Figure 5 It is a structural schematic diagram of the connecting frame in the utility model;

[0022] Figure 6 It is a structural schematic diagram of the scraper in the utility model;

[0023] Figure 7 It is a structural schematic diagram of the filter screen in the utility model;

[0024] In the figure: 1. fixing frame; 11. first bolt; 12. first fixing plate; 13. first telescopic arm; 14. connecting plate; 15. second bolt; 16. second telescopic arm; 17. second fixing plate; 18. third bolt; 2. connecting frame; 21. first screw rod; 22. nut; 23. steel rod; 24. steel wire; 3. fixing rod; 31. filter screen; 4. electric push rod; 41. support plate; 5. groove; 51. second screw rod; 52. support pad; 6. support rod; 61. scraper; 8. tower frame; 81. shear wall body. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figures 1 to 4As shown, a steel tube bundle shear wall structure tower crane according to an embodiment of the utility model comprises a tower 8; a fixing frame 1 is installed in the middle of the tower 8; a plurality of groups of first bolts 11 are fixedly connected to the side wall of the fixing frame 1; the middle of the first bolts 11 are threadedly connected to the tower 8, and two groups of first fixing plates 12 are fixedly connected to the side wall of the fixing frame 1; two first fixing plates 12 form a group; the two groups of first fixing plates 12 are arranged opposite to each other; a first telescopic arm 13 is hingedly connected to the middle of the first fixing plate 12; the ends of the two first telescopic arms 13 are hingedly connected to a connecting plate 14; the connecting plate 14 The middle part is threadedly connected with multiple groups of second bolts 15; the connecting plate 14 is installed on one side of the shear wall body 81; the side wall of the connecting plate 14 is hinged with two second telescopic arms 16; the two second telescopic arms 16 are arranged opposite to each other; the end of the second telescopic arm 16 is hinged with a second fixing plate 17; the middle part of the second fixing plate 17 is threadedly connected with a third bolt 18; when working, the fixing frame 1 is placed at a designated position in the middle of the tower 8, the fixing frame 1 is fixed to the tower 8 by multiple groups of first bolts 11, and the first telescopic arm 13 is stretched so that the connecting plate 14 is close to the side wall of the shear wall body 81 The connecting plate 14 is fixed to the shear wall body 81 by multiple sets of second bolts 15. The end of the first telescopic arm 13 can be rotated in the middle of the connecting plate 14 according to the angle between the tower 8 and the shear wall body 81. The multiple sets of second telescopic arms 16 are stretched to make the second fixing plate 17 at the end fit with the side wall of other shear wall bodies 81. The second fixing plate 17 is then fixed by multiple sets of third bolts 18. The tower 8 is fixed during operation by multiple sets of second telescopic arms 16 and the first telescopic arms 13. The first telescopic arms 13 and the second telescopic arms 16 are fixed in a manner that can effectively The tower 8 has higher stability during operation and can adapt to buildings of different heights and structures. The installation and disassembly process is also relatively convenient, which can effectively reduce the shaking or tilting of the tower 8 when working under strong wind force, effectively reduce the problem of reduced safety due to shaking or tilting, and effectively reduce construction accidents caused by the tower 8 during construction. The first telescopic arm 13 and the second telescopic arm 16 can disperse the fixing points and increase the fixing area, which can effectively improve the load-bearing capacity of the tower 8, so that the tower 8 can handle heavier loads and effectively improve construction efficiency.

[0027] like Figure 2 , Figure 5 , Figure 6As shown, a plurality of connecting frames 2 are installed in the middle of the first telescopic arm 13; each two connecting frames 2 form a group, and two first screw rods 21 are threadedly connected to the ends of the two opposing connecting frames 2; the two first screw rods 21 are arranged oppositely; a nut 22 is threadedly connected to the middle of the first screw rod 21; two steel rods 23 are fixedly connected to the middle of the connecting frame 2; the steel rods 23 are arranged obliquely; steel wires 24 are fixedly connected to the ends of the two steel rods 23; when working, the two connecting frames 2 are placed in the middle of the first telescopic arm 13, the first screw rods 21 are inserted into the corresponding ends of the two connecting frames 2, and the nut 22 is screwed from the end of the first screw rod 21, so that the first screw rod 21 fixes the two connecting frames 2 in the middle of the first telescopic arm 13, and supports and fixes the first telescopic arm 13. During the process, the steel wire 24 protects the first telescopic arm 13 through the steel rod 23, and a plurality of connecting frames 2 are installed on the first telescopic arm 13. The middle part of the second telescopic arm 16 is also equipped with a plurality of connecting frames 2 for protection like the first telescopic arm 13. The steel wire 24 can effectively reduce the accidental contact of objects with the first telescopic arm 13 or the second telescopic arm 16, and effectively reduce the accidental collision of mechanical equipment or building materials with the first telescopic arm 13 or the second telescopic arm 16 during the construction process. The steel wire 24 can buffer the collision of objects with the first telescopic arm 13 or the second telescopic arm 16, and effectively reduce the damage to the first telescopic arm 13 or the second telescopic arm 16. The steel wire 24 is not easily damaged during use and can be easily cleaned and replaced, thereby effectively improving the safety of the construction process.

[0028] like Figure 2 , Figure 6 , Figure 7 As shown, a fixing rod 3 is slidably connected to the middle of the steel wire 24; a filter screen 31 is fixedly connected to the side walls of the fixing rod 3 that are close to each other; when working, by placing one end of multiple fixing rods 3 connected to the filter screen 31 on the corresponding end of the steel wire 24, the fixing rod 3 is moved to make the fixing rod 3 slide in the middle of the steel wire 24, and the concrete during construction is blocked by multiple filter screens 31. The filter screen 31 can effectively block concrete impurities during the construction process, effectively reduce the accumulation of concrete impurities on the first telescopic arm 13 or the second telescopic arm 16, effectively reduce the problem of concrete impurities being scattered on the first telescopic arm 13 or the second telescopic arm 16 and being difficult to remove, and effectively reduce the corrosion and damage of the first telescopic arm 13 or the second telescopic arm 16 caused by long-term accumulation, effectively increasing the reliability and cleanliness of the construction.

[0029] like Figure 2 , Figure 3 , Figure 4As shown, two electric push rods 4 are fixedly connected to the bottom of the second telescopic arm 16; the two electric push rods 4 are fixedly connected near the end position of the second telescopic arm 16; the two electric push rods 4 are arranged oppositely; the output end of the electric push rod 4 is fixedly connected to a support plate 41; during operation, when the second telescopic arm 16 is fixed on the shear wall body 81, the electric push rod 4 is controlled to stretch so that the support plate 41 contacts the ground, and the two ends of the second telescopic arm 16 are supported by the electric push rod 4. The electric push rod 4 can provide additional support for the second telescopic arm 16, effectively increasing the stability of the second telescopic arm 16 during the fixing process, and the electric push rod 4 and the support plate 41 can make the connection between the second telescopic arm 16 and the shear wall body 81 tighter and firmer, thereby effectively improving the construction quality of the entire structure, and can effectively adapt to different environments, thereby effectively improving the construction quality and construction safety.

[0030] like Figure 2 , Figure 3 , Figure 4 When the support plate 41 is uneven, the second screw 51 is screwed to make the support pad 52 move downward, and the support pad 52 contacts the depressed position of the ground, and the second screw 51 is screwed again to make the support pad 52 move upward, and the support pad 52 moves into the groove 5 and retracts, so that the bottom of the support pad 52 is flush with the bottom of the support plate 41. When the second screw 51 is used to support the uneven ground, the length of the second screw 51 is adjusted to make the support plate 41 fit the ground better, effectively reducing the problem of shaking or tilting caused by the uneven ground when the support plate 41 supports the second telescopic arm 16, and can effectively make the support plate 41 fit closely with the ground, reducing additional stress and wear during operation.

[0031] like Figure 6As shown, multiple groups of support rods 6 are fixedly connected to the middle part of the first telescopic arm 13; multiple groups of support rods 6 are fixedly connected to one end of the connection of the first telescopic arm 13; multiple groups of support rods 6 are fixedly connected to the middle part of the second telescopic arm 16; multiple groups of support rods 6 are fixedly connected to one end of the connection of the second telescopic arm 16; a scraper 61 is fixedly connected to the middle part of the support rod 6; during operation, when the middle connection of the first telescopic arm 13 or the second telescopic arm 16 contracts, the surface of the first telescopic arm 13 or the second telescopic arm 16 is cleaned by the scraper 61, and the scraper 61 can effectively clean the surface of the first telescopic arm 13 and the second telescopic arm 16, which can effectively reduce the problem of impurities and residues on the surface of the first telescopic arm 13 and the second telescopic arm 16 causing a decrease in telescopic performance, effectively reduce the blockage or damage of the connection at the middle part of the first telescopic arm 13 and the second telescopic arm 16, and effectively reduce the dust and impurities entering the first telescopic arm 13 and the second telescopic arm 16 to cause wear or resistance, so that the telescopic operation is smoother.

[0032] During operation, the fixing frame 1 is placed at a designated position in the middle of the tower 8, the fixing frame 1 is fixed to the tower 8 by multiple sets of first bolts 11, the first telescopic arm 13 is stretched so that the connecting plate 14 fits with the side wall of the shear wall body 81, and the connecting plate 14 is fixed to the shear wall body 81 by multiple sets of second bolts 15. The end of the first telescopic arm 13 can be rotated in the middle of the connecting plate 14 according to the angle between the tower 8 and the shear wall body 81, and the multiple sets of second telescopic arms 16 are stretched so that the second fixing plate 17 at the end fits with the side wall of the other shear wall body 81. The second fixing plate 17 is then fixed by multiple sets of third bolts 18, and the tower 8 is fixed during operation by multiple sets of second telescopic arms 16 and the first telescopic arms 13. The two sets of connecting frames 2 are placed in the middle of the first telescopic arms 13, and the first screw rod 21 is inserted into the ends of the two corresponding connecting frames 2. The nut 22 is screwed from the end of the first screw rod 21 so that the first screw rod 21 fixes the two connecting frames 2 in the middle of the first telescopic arm 13. During the process of supporting and fixing the first telescopic arm 13, the steel wire 24 is fixed to the first telescopic arm 13 through the steel rod 23. For protection, a plurality of connecting frames 2 are installed on the first telescopic arm 13, and a plurality of connecting frames 2 are installed in the middle of the second telescopic arm 16 and the first telescopic arm 13 for protection. By placing one end of a plurality of fixing rods 3 connected to the filter screen 31 on one end of the corresponding steel wire 24, the fixing rod 3 is moved to slide in the middle of the steel wire 24, and the concrete during construction is blocked by the plurality of filter screens 31. When the second telescopic arm 16 is fixed on the shear wall body 81, the electric push rod 4 is controlled to stretch so that the support plate 41 contacts the ground, and the electric push rod 4 is connected to the second telescopic arm 16. The push rod 4 supports the two ends of the second telescopic arm 16. When the support plate 41 is on an uneven ground, the second screw 51 is turned to move the support pad 52 downward, and the support pad 52 contacts the concave position of the ground, and the second screw 51 is turned again to move the support pad 52 upward. After moving, the support pad 52 enters the groove 5 and is retracted, so that the bottom of the support pad 52 is flush with the bottom of the support plate 41. When the middle connection of the first telescopic arm 13 or the second telescopic arm 16 shrinks, the surface of the first telescopic arm 13 or the second telescopic arm 16 is cleaned by the scraper 61.

[0033] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A steel tube bundle shear wall structure tower crane, comprising a tower (8); characterized in that: A fixing frame (1) is installed in the middle of the tower (8); a plurality of groups of first bolts (11) are fixedly connected to the side wall of the fixing frame (1); the middle of the first bolts (11) are threadedly connected to the tower (8), and two groups of first fixing plates (12) are fixedly connected to the side wall of the fixing frame (1); two first fixing plates (12) form one group; the two groups of first fixing plates (12) are arranged opposite to each other; a first telescopic arm (13) is hingedly connected to the middle of the first fixing plate (12); the ends of the two first telescopic arms (13) are hingedly connected to a connecting plate (14); a plurality of groups of second bolts (15) are threadedly connected to the middle of the connecting plate (14); the connecting plate (14) is installed on one side of the shear wall body (81); two second telescopic arms (16) are hingedly connected to the side wall of the connecting plate (14); the two second telescopic arms (16) are arranged opposite to each other; a second fixing plate (17) is hingedly connected to the end of the second telescopic arm (16); a third bolt (18) is threadedly connected to the middle of the second fixing plate (17).

2. A steel tube bundle shear wall structure tower crane according to claim 1, characterized in that: A plurality of groups of connecting frames (2) are installed in the middle of the first telescopic arm (13); every two of the connecting frames (2) form a group, and two first screw rods (21) are threadedly connected to the ends of two opposite groups of connecting frames (2); the two first screw rods (21) are arranged opposite to each other; a nut (22) is threadedly connected to the middle of the first screw rod (21); two steel rods (23) are fixedly connected to the middle of the connecting frame (2); the steel rods (23) are arranged obliquely; and steel wires (24) are fixedly connected to the ends of the two steel rods (23).

3. A steel tube bundle shear wall structure tower crane according to claim 2, characterized in that: The middle part of the steel wire (24) is slidably connected to a fixing rod (3); and the side walls of the fixing rod (3) close to each other are fixedly connected to a filter screen (31).

4. A steel tube bundle shear wall structure tower crane according to claim 3, characterized in that: Two electric push rods (4) are fixedly connected to the bottom of the second telescopic arm (16); the two electric push rods (4) are fixedly connected at positions close to the end of the second telescopic arm (16); the two electric push rods (4) are arranged opposite to each other; and a support plate (41) is fixedly connected to the output end of the electric push rod (4).

5. The steel tube bundle shear wall structure tower crane according to claim 4, characterized in that: The bottom of the support plate (41) is provided with a groove (5); the middle of the support plate (41) is threadedly connected to a second screw rod (51); the end of the second screw rod (51) is rotatably connected to a support pad (52); the support pad (52) is arranged at a position corresponding to the groove (5).

6. A steel tube bundle shear wall structure tower crane according to claim 5, characterized in that: A plurality of groups of support rods (6) are fixedly connected to the middle of the first telescopic arm (13); the plurality of groups of support rods (6) are fixedly connected to one end of the connection of the first telescopic arm (13); a plurality of groups of support rods (6) are fixedly connected to the middle of the second telescopic arm (16); the plurality of groups of support rods (6) are fixedly connected to one end of the connection of the second telescopic arm (16); a scraper (61) is fixedly connected to the middle of the support rod (6).