Building construction material sorting device

By strengthening the construction material sorting device with components such as straightening rings and electric push rods, the problem of sorting bent steel bars and sand has been solved, and the effective separation and stable recycling of steel bars and sand have been achieved.

CN223789447UActive Publication Date: 2026-01-13ZHEJIANG YIJIAN CONSTR GROUP
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Patent Information

Application Number
CN202423083246.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2026-01-13
Estimated Expiration
2034-12-13

AI Technical Summary

Technical Problem

Existing construction material sorting equipment is unable to effectively sort bent steel bars and sand, resulting in low sorting strength and affecting recycling convenience.

Method used

The system employs components such as a reinforced straightening ring, a vibration module, and an electric push rod. The straightening and sorting device straightens the bent steel bars and separates them from the sand. The vibration module shakes off the sand, and the electric push rod fixes the ends of the steel bars, ensuring effective separation of the steel bars from the sand.

Benefits of technology

It improves the sorting efficiency of bent steel bars and sand, ensures that the ends of the steel bars are fixed, avoids confusion, and improves the convenience of recycling and the stability of sorting.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a building construction material sorting device which structurally comprises a base, an integrated control box, a small article storage box, a power supply end, a driver and a straightening sorter, the side edge of the upper end of the base is fixedly connected with the integrated control box, and the small article storage box is further carried at the upper end of the integrated control box; plastic parts, bolts and other articles are stored through the small article storage box on the base, and then one end of a bent steel bar can be fixed by combining the vibration module of the straightening sorter on the side edge, the end fixator in the strengthening straightening ring and the threaded rod. And then the threaded rod rotates and displaces in the transverse sleeve to forcibly straighten the steel bars, in the process, a vibration module vibrates off sand on the steel bars, the sand enters a collection box through a through groove and a vertical pipe, so that sorting of the bent steel bars, the sand and plastic parts can be effectively improved, and then the bent steel bars are straightened to improve later recovery convenience.
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Description

Technical Field

[0001] This utility model relates to the field of building material sorting technology, specifically a building construction material sorting device. Background Technology

[0002] Construction materials refer to various raw materials, semi-finished products, finished products, and auxiliary materials used in the construction process. Therefore, the materials generated after construction need to be classified using specialized sorting devices to effectively separate various materials for later classification and recycling, thus avoiding the situation where a large amount of materials are mixed together and cannot be recycled.

[0003] However, the existing sorting equipment still has the following defects: Since construction materials can be divided into types such as steel bars and sand, after the construction project is completed, the remaining steel bars and sand will be mixed together. At the same time, the remaining steel bars will be bent due to the construction process. Therefore, when the bent steel bars enter the sorting equipment for sorting, they are very easy to get stuck and the sand in the corner is difficult to separate, thus reducing the sorting strength of steel bars and sand.

[0004] Therefore, current sorting devices struggle to sort bent construction steel bars. Due to the various bending angles of the bent steel bars, the device shape cannot match the shape of the steel bars, thus reducing the sorting strength of the sorting device for construction steel bars and reducing its effectiveness. Furthermore, the bent steel bars themselves also reduce the convenience of subsequent recycling due to their shape. Utility Model Content

[0005] To address the above problems, this utility model provides a construction material sorting device.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a construction material sorting device, the structure of which includes: a base, an integrated control box, a small item storage box, a power supply terminal, a drive motor, and a straightening sorter. The upper side of the base is fixedly connected to the integrated control box, and the integrated control box also carries the small item storage box on its upper end. The power supply terminal is located on the upper layer of the base and is electrically connected to the integrated control box through a line. The drive motor is located on the upper layer of the power supply terminal. The straightening sorter is installed in the internal area of ​​the base and is movably connected to the drive motor.

[0007] Furthermore, the straightening sorter is equipped with a reinforced straightening ring. The upper and lower ends of the reinforced straightening ring are connected to vibration modules and are both installed in the center area of ​​the surface of the parallel plate. The lower end of the parallel plate is provided with a through groove and a vertical tube. The lower end of the vertical tube passes through a separator and fits together with the upper end of the collection box. The collection box is embedded parallel to the lower middle area of ​​the positioning frame. The positioning frame positions the collection box, vibration module, and reinforced straightening ring in the side area of ​​the base.

[0008] Furthermore, small plastic parts and bolts are classified by the small item storage box on the base. Then, the straightening and sorting device is controlled by the integrated control box, power supply and drive motor. The straightening and sorting device straightens steel bars of different diameters through three sets of different diameter sizes. During the process, the reinforced straightening ring, combined with the vibration module, through groove and vertical pipe, shakes the sand into the collection box.

[0009] Furthermore, the base integrates the control box and the bottom layer of the straightening sorter, which are completely covered. The small item storage box has multiple sets of partition walls, and the straightening sorter is arranged in a parallel orientation.

[0010] Furthermore, the positioning frame is rectangular in shape and uses a separator to separate the collection box and the reinforcing straightening ring vertically. The center of the separator is hollow and the edge of the reinforcing straightening ring is also mesh-like. There are three sets of reinforcing straightening rings, and the three sets are arranged in descending order of size in the horizontal direction. Each set of reinforcing straightening rings has a vibration module on its edge. The vibration module carries a power spindle to complete the electrical connection with the integrated control box.

[0011] Furthermore, the reinforced straightening ring is also equipped with a coupling. One end of the coupling is movably connected to the drive motor, and the other end is embedded in the center of the transverse sleeve and fixedly connected to one end of the threaded rod. The other end of the threaded rod is embedded in the inner area of ​​the connecting sleeve and rotates inside the connecting sleeve. The connecting sleeve is welded to the side center of the end fixer.

[0012] Furthermore, the coupling is embedded in the center of the transverse sleeve in a straight line, and the inner wall of the transverse sleeve is provided with an internal thread to adapt to the threaded rod. The connecting sleeve has a rotating cavity inside to allow the threaded rod to rotate, and the end retainer is perpendicular to the connecting sleeve.

[0013] Furthermore, the end retainer is provided with a solid block, the center of which has a slot forming a "U" shape, and a magnetic suction plate is connected to the bottom layer inside through the slot. A flattening block is provided above the magnetic suction plate, and an electric push rod is connected to the center of the upper end of the flattening block. The upper end of the electric push rod passes through the upper central area of ​​the solid block and is connected to the internal area of ​​the controller for movable connection.

[0014] Furthermore, the inner walls of the slots of the solid blocks are all polished so that the magnetic plates are set in a parallel position. The flattened blocks are solid and parallel and perpendicular to the electric push rod. The controller at the upper end of the electric push rod is electrically connected to the integrated control box and is composed of a small motor, reduction gear, screw, and guide sleeve. The electric push rod is vertically controlled through the electrical control state.

[0015] Furthermore, the connecting sleeve is provided with a welding layer, which is integral with the bottom layer of the sleeve body. A threaded assembly cover is provided at the upper end of the sleeve body. A threaded through groove is opened in the center of the threaded assembly cover to allow the threaded rod to pass through. A large-diameter turntable is also provided inside the sleeve body, and the center areas of the turntables coincide with each other. The large-diameter turntable is fixedly connected to the threaded rod through the threaded through groove.

[0016] Furthermore, the sleeve is welded to the center of the side of the end fixer through a welding layer, and one end of the threaded rod is connected to the center of the large-diameter turntable inside through a threaded groove. The diameter of the large-diameter turntable is larger than the diameter of the threaded groove. Beneficial effects

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model uses a small storage box on the base to store plastic parts and bolts, etc. Then, combined with the vibration module of the straightening sorter on the side, the end fixer inside the reinforced straightening ring, and the threaded rod, one end of the bent steel bar can be fixed. Then, the threaded rod is used to rotate and displace inside the horizontal sleeve to force the steel bar to straighten. During the process, the vibration module shakes the sand off the steel bar, allowing it to enter the collection box through the through groove and vertical pipe. This effectively improves the sorting of bent steel bars, sand, and plastic parts, and straightens the bent steel bars to improve the convenience of subsequent recycling.

[0019] 2. This utility model, through the improvement of the end fixing device, utilizes the internal components of the controller to drive the electric push rod downwards, so that the electric push rod, together with the flattening block, squeezes the end of the rebar. After the end of the rebar is flattened, it can be attracted by the magnetic plate, and at the same time, the downward pressure of the flattening block completes the fixation. Therefore, it can achieve a stable fixing effect on the end of the rebar. After the end of the rebar is flattened, it can achieve the effect of easy differentiation, avoiding the confusion caused by straightening and mixing with unused rebar, thus improving the identification.

[0020] 3. With further improvements through the connecting sleeve, this utility model utilizes the rotating cavity inside the sleeve to allow the large-diameter turntable to rotate internally. This ensures that the diameter of the large-diameter turntable is greater than that of the threaded through groove, preventing the threaded rod from being pulled out of the sleeve when it rotates. Therefore, it can be combined with the sleeve to stably drive the end fixing device to move laterally, ensuring the stability of the straightening operation. Then, the threaded assembly cover can be threadedly separated from the sleeve, so that the large-diameter turntable can be removed from the sleeve for maintenance later. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a construction material sorting device according to the present invention.

[0022] Figure 2This is a cross-sectional structural diagram of an improved straightening sorter according to the present invention.

[0023] Figure 3 This is a side view of the internal component of the reinforcing straightening ring according to the present invention.

[0024] Figure 4 This is a cross-sectional structural diagram of an improved end-fixer according to the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of an improved connecting sleeve according to the present invention.

[0026] In the diagram: Base-1, Integrated control box-2, Small item storage box-3, Power supply terminal-4, Drive motor-5, Straightening and sorting device-6;

[0027] Positioning frame-61, separator-62, collection box-63, vertical tube-64, through groove-65, parallel plate-66, vibration module-67, reinforced straightening ring-68;

[0028] Coupling-681, Transverse sleeve-682, Threaded rod-683, Connecting sleeve-684, End retainer-685;

[0029] Solid block-6851, slot-6852, magnetic plate-6853, flattening block-6854, electric push rod-6855, controller-6856;

[0030] Welding layer - 6841, sleeve - 6842, threaded assembly cover - 6843, threaded through groove - 6844, large diameter turntable - 6845. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example

[0033] like Figures 1-5 As shown, this utility model provides a construction material sorting device.

[0034] This utility model provides a construction material sorting device, including: a base 1, an integrated control box 2, a small item storage box 3, a power supply terminal 4, a drive motor 5, and a straightening sorter 6. The upper side of the base 1 is fixedly connected to the integrated control box 2, and the integrated control box 2 also carries the small item storage box 3 on its upper end. The power supply terminal 4 is located on the upper layer of the base 1 and is electrically connected to the integrated control box 2 through a line. The drive motor 5 is located on the upper layer of the power supply terminal 4. The straightening sorter 6 is installed in the internal area of ​​the base 1 and is movably connected to the drive motor 5.

[0035] The straightening sorter 6 is equipped with a reinforced straightening ring 68. The upper and lower ends of the reinforced straightening ring 68 are connected to vibration modules 67 and are both installed in the center area of ​​the surface of the parallel plate 66. The lower end of the parallel plate 66 is provided with a through groove 65 and a vertical tube 64. The lower end of the vertical tube 64 passes through a separator 62 and is in close contact with the upper end of the collection box 63. The collection box 63 is embedded in the lower middle part of the positioning frame 61. The positioning frame 61 positions the collection box 63, vibration modules 67 and reinforced straightening ring 68 in the side area of ​​the base 1.

[0036] Small plastic parts and bolts are sorted by the small item storage box 3 on the base 1. Then, the straightening sorter 6 is controlled by the integrated control box 2, power supply terminal 4 and drive motor 5. The straightening sorter 6 straightens steel bars of different diameters through three sets of different diameter sizes. During the process, the reinforcing straightening ring 68, together with the vibration module 67, through groove 65 and vertical pipe 64, shakes the sand into the collection box 63.

[0037] The base 1 completely covers the bottom layer of the integrated control box 2 and the straightening sorter 6. The small item storage box 3 has multiple sets of partition walls inside, and the straightening sorter 6 is arranged in a parallel orientation.

[0038] The positioning frame 61 is rectangular in shape and separates the collection box 63 and the reinforcing straightening ring 68 vertically through the separator 62. The center of the separator 62 is hollow and the edge of the reinforcing straightening ring 68 is also in a mesh shape. There are three sets of reinforcing straightening rings 68, and the three sets are arranged in a horizontal manner from large to small. Each set of reinforcing straightening rings 68 carries a vibration module 67 on its edge. The vibration module 67 carries a power cord to complete the electrical connection with the integrated control box 2.

[0039] The reinforced straightening ring 68 is further provided with a coupling 681. One end of the coupling 681 is movably connected to the drive motor 5, and the other end is embedded in the center of the transverse sleeve 682 and fixedly connected to one end of the threaded rod 683. The other end of the threaded rod 683 is embedded in the internal area of ​​the connecting sleeve 684 and rotates inside the connecting sleeve 684. The connecting sleeve 684 is welded to the side center of the end retainer 685.

[0040] The coupling 681 is embedded in the center of the transverse sleeve 682 in a straight line, and the inner wall of the transverse sleeve 682 is provided with an internal thread to be adapted to the threaded rod 683. The connecting sleeve 684 has a rotating cavity inside to allow the threaded rod 683 to rotate. The end retainer 685 is perpendicular to the connecting sleeve 684.

[0041] The end retainer 685 is provided with a solid block 6851. The solid block 6851 has a slot 6852 in the center to form a "U" shape. A magnetic suction plate 6853 is connected to the bottom layer inside through the slot 6852. A flattening block 6854 is provided above the magnetic suction plate 6853. An electric push rod 6855 is also connected to the center of the upper end of the flattening block 6854. The upper end of the electric push rod 6855 passes through the upper central area of ​​the solid block 6851 and is connected to the internal area of ​​the controller 6856 for movable connection.

[0042] In this design, the inner walls of the slots 6852 of the solid block 6851 are all flattened so that the magnetic suction plate 6853 is set in a parallel position. The flattening block 6854 is solid and parallel and perpendicular to the electric push rod 6855. The controller 6856 at the upper end of the electric push rod 6855 is electrically connected to the integrated control box 2 and is composed of a small motor, reduction gear, screw, and guide sleeve. The controller controls the electric push rod 6855 vertically through the electrical control state.

[0043] The connecting sleeve 684 is provided with a welding layer 6841, which is integral with the bottom layer of the sleeve body 6842. The upper end of the sleeve body 6842 is provided with a threaded assembly cover 6843. The threaded assembly cover 6843 has a threaded through groove 6844 in the center to allow the threaded rod 683 to pass through. The sleeve body 6842 is also provided with a large-diameter turntable 6845 with the center areas of the turntables overlapping each other. The large-diameter turntable 6845 is fixedly connected to the threaded rod 683 through the threaded through groove 6844.

[0044] The sleeve 6842 is welded to the side center of the end fixer 685 through the welding layer 6841, and the threaded rod 683 is connected to the center of the large-diameter turntable 6845 through the threaded groove 6844. The diameter of the large-diameter turntable 6845 is larger than the diameter of the threaded groove 6844.

[0045] The working principle of this utility model is explained below: The construction material sorting device can position the integrated control box 2, drive motor 5, and straightening sorter 6 in the sorting area via the base 1. Then, the integrated control box 2 provides power to the drive motor 5 through the power supply terminal 4, enabling the drive motor 5 to drive the straightening sorter 6 to operate. During the process, the small item storage box 3 can store small items such as plastic parts and bolts. Subsequently, the straightening sorter 6 will separate and position the collection box 63 and the reinforced straightening ring 68 in the side area of ​​the base 1 via the positioning frame 61 and the separator 62. Then, the three sets of reinforced straightening rings 68 with different diameters can simultaneously straighten and sort three types of steel bars with different diameters. During the straightening process, the vibration module 67, through the collection... The electrical control of the control box 2 is triggered, which shakes off the sand carried during the straightening process of the steel bar. The sand then passes through the through groove 65 and the vertical pipe 64, straight through the center of the separator 62, and enters the collection box 63. This enables rapid sorting of steel bars and sand. Finally, if there is too much sand in the collection box 63, it can be manually pulled out of the base 1 area to clean the sand inside. This strengthens the straightening ring 68, which can fix one end of the steel bar through the built-in end retainer 685. The end retainer 685 can be driven laterally by the threaded rod 683 through the connecting sleeve 684. The threaded rod 683 is driven by the coupling 681 through the transverse sleeve 682, so that one end of the coupling 681 is connected to one end of the threaded rod 683, and the other end... Connected to the working area of ​​the drive unit 5, the drive unit 5 drives the threaded rod 683 to rotate forward or backward inside the transverse sleeve 682 via the coupling 681. This, combined with the end retainer 685, allows the rebar to be straightened. During straightening, the edge of the reinforced straightening ring 68 is continuously stressed. The high hardness of the carbon steel material prevents deformation caused by continuous pressure, improving the stability of the straightening process. Furthermore, the side of the solid block 6851 of the end retainer 685 can fuse with the welded layer 6841 of the sleeve body 6842 of the connecting sleeve 684, achieving a strong combination. For this purpose, the threaded assembly cover 6843 of the sleeve body 6842 can be disassembled via a threaded connection, allowing the large-diameter turntable 6845 to be installed within the sleeve body 6842. The threaded rod 683 passes through the slot 6844 area of ​​the threaded assembly cover 6843, achieving the effect that the diameter of the large-diameter turntable 6845 is larger than that of the slot 6844. This stabilizes the solid block 6851 of the end holder 685, allowing it to move laterally, thus preventing the threaded rod 683 from directly rotating the solid block 6851. The slot 6852 of the solid block 6851 allows one end of the rebar to be inserted. After the rebar contacts the magnetic plate 6853, the flattening block 6854 in the upper area, in conjunction with the electric push rod 6855, descends vertically. The forced pressing effect of the electric push rod 6855 driving the flattening block 6854 flattens the rebar end, increasing the contact area with the magnetic plate 6853.The combination of adsorption and pressing effects improves stability during straightening. During the process, the electric push rod 6855 operates via the controller 6856 located on the upper end of the solid block 6851. The controller 6856, with its built-in small motor, reduction gear, screw, guide sleeve, and other components, is controlled by the integrated control box 2. The small motor drives the reduction gear and screw to lower the electric push rod 6855 at a stable and uniform speed. The built-in screw, in conjunction with the guide sleeve, lowers vertically, ensuring that the electric push rod 6855 stably lowers the flattening block 6854 to flatten the ends of the rebar.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A construction material sorting apparatus, comprising: The utility model relates to a kind of straightening sorting device, including base (1), integrated control box (2), small object storage box (3), power supply end (4), drive machine (5), straightening sorting device (6), the upper end side of the base (1) is fixedly connected with integrated control box (2) and integrated control box (2) upper end also carries small object storage box (3), power supply end (4) is set to the upper layer of base (1) and is electrically connected with integrated control box (2) by circuit, drive machine (5) is set to the upper layer of power supply end (4), straightening sorting device (6) is installed in the internal area of base (1) and is movably connected with drive machine (5), it is characterized by: The straightening sorting device (6) is provided with a reinforced straightening ring (68), the upper and lower ends of the reinforced straightening ring (68) are connected with a vibration module (67), and the vibration module (67) is installed on the surface center of a parallel plate (66). The lower end of the parallel plate (66) is provided with a through slot (65) and a vertical pipe (64). The vertical pipe (64) penetrates the partition (62) and is attached to the upper end of the collection box (63). The collection box (63) is parallelly embedded in the middle and lower part of the positioning frame (61). The positioning frame (61) positions the collection box (63), the vibration module (67), and the reinforced straightening ring (68) on the side edge of the base (1).

2. A construction material sorting device according to claim 1, wherein: Small plastic parts and bolts are classified through the small object storage box (3) on the base (1), and then the integrated control box (2), the power supply end (4), and the drive machine (5) are used to control the straightening sorting device (6). The straightening sorting device (6) is processed by three groups of different diameter sizes to straighten different diameter steel bars. In the process, the reinforced straightening ring (68) combines the vibration module (67), the through slot (65), and the vertical pipe (64) to shake the sand into the collection box (63).

3. A construction material sorting device according to claim 1, wherein: The base (1) completely covers the integrated control box (2) and the bottom layer of the straightening sorting device (6). The small object storage box (3) is provided with a plurality of partition walls. The straightening sorting device (6) is arranged in a parallel orientation.

4. A construction material sorting device according to claim 1, wherein: The positioning frame (61) is a rectangular shape. The collection box (63) and the reinforced straightening ring (68) are separated by the partition (62). The center of the partition (62) is hollow, and the edges of the reinforced straightening ring (68) are also in a mesh shape. The reinforced straightening ring (68) is provided with three groups, and the three groups are arranged from large to small in the horizontal direction. Each group of reinforced straightening rings (68) carries a vibration module (67). The vibration module (67) carries a power wire shaft to complete electrical connection with the integrated control box (2).

5. A construction material sorting device according to claim 1, wherein: The reinforced straightening ring (68) is further provided with a coupling (681). One end of the coupling (681) is movably connected with the drive machine (5), and the other end is embedded in the inner center of the horizontal sleeve (682) and fixedly connected with one end of the threaded rod (683). The other end of the threaded rod (683) is embedded in the inner area of the adapter sleeve (684) and rotates in the adapter sleeve (684). The adapter sleeve (684) is welded to the side center of the end fixed device (685). The connecting shaft (681) is embedded in the inner center of the transverse sleeve (682) in straight orientation, and the inner wall of the transverse sleeve (682) is provided with internal threads matched with the threaded rod (683), the inner part of the adapter sleeve (684) is provided with a rotating cavity for the rotation of the threaded rod (683), and the end fixing device (685) is perpendicular to the adapter sleeve (684).

6. A construction material sorting device according to claim 5, wherein: The end fixing device (685) is provided with a solid block (6851), the center of the solid block (6851) is provided with a slot (6852) to form a "concave" shape, and a magnetic plate (6853) is connected to the inner bottom layer through the slot (6852), a flattening block (6854) is arranged above the magnetic plate (6853), and an electric push rod (6855) is further connected to the center of the upper end of the flattening block (6854), the upper end of the electric push rod (6855) penetrates the upper central area of the solid block (6851) and is connected to the inner area of the controller (6856) and is movably connected; The inner wall of the slot (6852) of the solid block (6851) is in a flat shape, so that the magnetic plate (6853) is arranged in parallel, the flattening block (6854) is in a solid parallel state and perpendicular to the electric push rod (6855), the controller (6856) at the upper end of the electric push rod (6855) is electrically connected to the integrated control box (2) and is internally composed of a small motor, a reduction gear, a screw rod and a guide sleeve, and the electric push rod (6855) is vertically controlled through electric control.

7. A construction material sorting device according to claim 5, wherein: The adapter sleeve (684) is provided with a welding layer (6841), the welding layer (6841) is integrated with the bottom layer of the sleeve body (6842), and the upper end of the sleeve body (6842) is provided with a threaded assembly cover (6843), the center of the threaded assembly cover (6843) is provided with a threaded through slot (6844) for the threaded rod (683) to penetrate, and the sleeve body (6842) is further provided with a large-diameter turntable (6845) and the center areas are coincided with each other, and the large-diameter turntable (6845) is fixedly connected with the threaded rod (683) through the threaded through slot (6844). The sleeve body (6842) is welded to the side center of the end fixing device (685) through the welding layer (6841), and one end of the threaded rod (683) penetrates and is connected with the center of the large-diameter turntable (6845) in the sleeve body (6842) through the threaded through slot (6844), and the diameter of the large-diameter turntable (6845) is larger than that of the threaded through slot (6844).