Forming device for positioning and binding of frame column reinforcement

Abstract

The application discloses a forming device for positioning and binding of frame column steel bars, which comprises four right-angle round steels connected at the head and tail to form a closed control hoop; and a plurality of positioning members fixed at intervals on the right-angle round steels and located on the inner side of the closed control hoop, which are used for positioning and fixing the column steel bars after the closed control hoop is sleeved on the frame column steel bars. The forming device can not only play a role of shaping the steel framework during the installation of the steel bars of the present layer, but also solve the problem of positioning the steel bars at the root of the lower layer after the main body of the present layer is poured, thereby effectively improving the installation quality of the steel bars and having the advantages of simple structure, reasonable design, convenient use, high utilization rate, low cost, wide application range and the like.

Description

Technical Field

[0001] This invention relates to the field of construction equipment. More specifically, this invention relates to a forming device for positioning and binding steel reinforcement in frame columns. Background Technology

[0002] Reinforcing steel work is a crucial component of reinforced concrete construction, serving as the framework for support in reinforced concrete beams, slabs, columns, and foundations. There are specific methods for the binding, welding, and material calculation of reinforcing cages and skeletons. Because reinforcing steel work directly affects the load-bearing capacity of a building, impacting its collapse, very strict technical standards govern its quality.

[0003] Currently, during the concrete pouring process of frame structure systems, the self-weight of the concrete, the vibration loads from the concrete placing machine and vibrators, etc., can easily lead to severe misalignment of the reinforcing bars at the base of the frame columns after pouring, preventing the stirrups from being properly inserted into the column reinforcement. Adjusting the column reinforcement affects the stress on the column reinforcement, significantly increasing the workload and reducing work efficiency. During subsequent reinforcement installation, due to the positional deviation of individual reinforcing bars and improper installation, the overall reinforcement cage after binding is prone to uneven stress and shift in one direction. Formwork construction becomes difficult, and after the main structure is poured, appearance quality problems such as lack of protective layer, exposed reinforcement, honeycombing, and voids are likely to occur. Summary of the Invention

[0004] One object of the present invention is to provide a forming device for positioning and binding steel bars in frame columns, so as to at least solve the above-mentioned problems.

[0005] To achieve the objectives and other advantages of this invention, a forming device for positioning and binding the reinforcing bars of a frame column is provided, comprising: four right-angled round steel bars connected end to end to form a closed control hoop; and a plurality of positioning members fixed at intervals on the right-angled round steel bars and located inside the closed control hoop. The positioning members are used to position and fix the reinforcing bars of the frame column after the closed control hoop is fitted into the reinforcing bars of the frame column.

[0006] Preferably, in the forming device for positioning and binding the reinforcing bars of the frame column, the four right-angled round steel bars are connected end to end by a fixing member. The fixing member includes a fixing block, which is provided with a first fixing hole and a second fixing hole at intervals from top to bottom. The diameter of the first fixing hole and the second fixing hole is slightly larger than the diameter of the right-angled round steel bar. The top of the first fixing hole is provided with a first threaded hole communicating with the top surface of the fixing block, and a first bolt that mates with it is provided in the first threaded hole. The bottom of the second fixing hole is provided with a second threaded hole communicating with the bottom surface of the fixing block, and a second bolt that mates with it is provided in the second threaded hole.

[0007] Preferably, in the forming device for positioning and binding the reinforcing bars of the frame column, the right-angled round steel includes a short side and a long side that are perpendicular to each other. The positioning member includes a first positioning member and a plurality of second positioning members. The first positioning member is located on the short side and close to the long side. The first positioning member is used to position and fix the column reinforcement located at one corner of the frame column reinforcement. The plurality of second positioning members are spaced apart on the long side. The second positioning members are used to position and fix the column reinforcement located in the middle of the frame column reinforcement.

[0008] Preferably, in the forming device for positioning and binding the reinforcing bars of the frame column, the long side is composed of multiple expansion joints, each expansion joint including a first steel cylinder and a first steel column connected end to end, and adjacent expansion joints are connected to each other through the first steel column and the first steel cylinder, and the short side is a second steel cylinder, which can be connected to the first steel column.

[0009] Preferably, in the forming device for positioning and binding the reinforcing bars of the frame column, a telescopic plate is provided on the outer side of the long side along its length direction. One side of the telescopic plate is fixedly connected to the first steel cylinder connected to the short side through a connecting plate. Both ends of the telescopic plate protrude from the long side, and adjacent telescopic plates are detachably connected end to end to form a closed limiting hoop.

[0010] Preferably, in the forming device for positioning and binding the reinforcing bars of the frame column, one end of the telescopic plate is fixedly provided with a connecting plate, the connecting plate is provided with a first through hole, the other end of the telescopic plate is provided with a U-shaped sleeve plate that cooperates with the connecting plate, the U-shaped sleeve plate is provided with a pair of second through holes communicating with the first through hole, and the connecting plate and the U-shaped sleeve plate are fixedly connected by bolt and nut assemblies inserted into the first through hole and the second through hole.

[0011] Preferably, in the forming device for positioning and binding the reinforcing bars of the frame column, the telescopic plate is provided with a driving component, and the multiple telescopic sections are driven to move synchronously by the driving component.

[0012] Preferably, the forming device for positioning and binding the reinforcing bars of the frame column includes a driving component comprising: a plurality of linear actuators, each corresponding to one of the plurality of expansion joints and arranged along their length; the fixed end of each linear actuator is fixedly connected to an adjacent first steel cylinder via a first connecting block, and the output end is fixedly connected to an adjacent first connecting block or a second connecting block, the second connecting block being fixedly disposed on the outer side of the short side away from the long side; and a plurality of pairs of sliders, each corresponding to one of the plurality of linear actuators; each pair of sliders being fixedly disposed on the side of the linear actuator near the expansion plate and slidably connected to a groove provided on the expansion plate, the groove being arranged along the length of the expansion plate.

[0013] Preferably, the forming device for positioning and binding the reinforcing bars of the frame column includes two second positioning plates, which are arranged opposite each other and vertically fixed on the first steel cylinder. Each second positioning plate has a second positioning screw hole extending through it along the length of the first steel cylinder. Two second arc-shaped plates are arranged opposite each other and located between the two second positioning plates. The upper and lower sides of each second arc-shaped plate are fixedly connected to the adjacent second positioning plate by at least one second telescopic rod. Two second positioning screws correspond one-to-one with the two second positioning plates. Each second positioning screw is inserted into the second positioning screw hole and rotatably connected to the adjacent second arc-shaped plate.

[0014] Preferably, the forming device for positioning and binding the reinforcing bars of the frame column includes a first positioning plate, which is vertically fixed on the second steel cylinder, and a first positioning screw hole is provided through the first positioning plate along the length direction of the second steel cylinder; a first arc-shaped plate, which is disposed between the first positioning plate and the first steel cylinder, and the inner arc surface faces the first steel cylinder, and the upper and lower sides of the first arc-shaped plate are respectively fixedly connected to the first positioning plate through at least one first telescopic rod; and a first positioning screw, which is inserted into the first positioning screw hole and rotatably connected to the first arc-shaped plate.

[0015] The present invention has at least the following beneficial effects:

[0016] The forming device for positioning and binding the reinforcing bars of the frame column of the present invention can not only play the role of shaping the reinforcing bar skeleton during the installation of the reinforcing bars of this layer, but also solve the problem of positioning the root reinforcing bars of the lower layer after the main structure of this layer is poured, effectively improving the quality of reinforcing bar installation. It has the advantages of simple structure, reasonable design, convenient use, high utilization rate, low cost and wide applicability.

[0017] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of a forming device for positioning and binding steel bars in a frame column according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the connection state of the fastener according to another embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Schematic diagram of the middle fixing component;

[0021] Figure 4 This is an overall schematic diagram of a forming device for positioning and binding steel bars in a frame column, according to another embodiment of the present invention.

[0022] Figure 5 yes Figure 4 Schematic diagram of the structure of a right-angled round steel bar;

[0023] Figure 6 yes Figure 4 A schematic diagram of the unfolded state of the forming device used for positioning and binding the reinforcing bars of the frame columns;

[0024] Figure 7 This is a schematic diagram of the structure of the second positioning member according to another embodiment of the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings, so that those skilled in the art can implement it based on the description.

[0026] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0027] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0028] like Figure 1 As shown, a forming device for positioning and binding the reinforcing bars of a frame column includes: four right-angled round steel bars 1 connected end to end to form a closed control hoop; and multiple positioning elements 2, which are fixed at intervals on the right-angled round steel bars 1 and located inside the closed control hoop. The positioning elements 2 are used to position and fix the column reinforcing bars after the closed control hoop is fitted into the reinforcing bars of the frame column.

[0029] In the above embodiments, the forming device for positioning and binding the reinforcing bars of the frame column includes four right-angled round steel bars 1 and multiple positioning components 2. The four right-angled round steel bars 1 are connected end to end to form a closed control hoop, which is used to fit around the outside of the reinforcing bars of the frame column to limit their movement. The multiple positioning components 2 are located inside the closed control hoop and are spaced apart along the circumference of the closed control hoop. Each positioning component 2 is welded and fixed to the right-angled round steel bar 1. The multiple positioning components are used to position and fix the reinforcing bars of the frame column, and the fixing method includes, but is not limited to, binding.

[0030] When in use, this device can be fitted onto the outside of the frame column reinforcement, with the fitting position controlled above the elevation of the top slab of this floor and below the connection node of the upper layer reinforcement. Then, it can be positioned and fixed by the positioning piece. After the floor is poured, the fixing between the positioning piece and the column reinforcement can be released, and the device can be moved upward, or the device can be taken out from the top of the frame column reinforcement for reuse.

[0031] The forming device for positioning and binding the reinforcing bars of the frame column of the present invention can not only play the role of shaping the reinforcing bar skeleton during the installation of the reinforcing bars of this layer, but also solve the problem of positioning the root reinforcing bars of the lower layer after the main structure of this layer is poured, effectively improving the quality of reinforcing bar installation. It has the advantages of simple structure, reasonable design, convenient use, high utilization rate, low cost and wide applicability.

[0032] In another embodiment, such as Figures 1-3 As shown, the four right-angled round steel bars 1 are connected end to end by a fastener 3. The fastener includes a fastener block 4, which has a first fastener hole 5 and a second fastener hole 6 spaced apart from top to bottom. The diameter of the first fastener hole 5 and the second fastener hole 6 is 5-20mm larger than the diameter of the right-angled round steel bar 1. The top of the first fastener hole 5 has a first threaded hole that communicates with the top surface of the fastener block 4, and a first bolt 7 that mates with it is provided in the first threaded hole. The bottom of the second fastener hole 6 has a second threaded hole that communicates with the bottom surface of the fastener block 4, and a second bolt 8 that mates with it is provided in the second threaded hole.

[0033] In this embodiment, by inserting the first and second ends of two adjacent right-angled round steel bars into the first and second fixing holes provided on the fixing block, respectively, and then locking the first and second bolts to the first and second ends, the two adjacent right-angled round steel bars can be connected end to end. The structure is simple and easy to assemble and disassemble. In addition, before the first and second bolts are locked, the size of the closed control hoop can be adjusted by adjusting the distance between the first and second ends extending into the first and / or second fixing holes to meet the requirements of various types of frame column reinforcement.

[0034] In another embodiment, such as Figure 1 , Figure 4 , Figure 6 As shown, the right-angled round steel 1 includes a short side and a long side that are perpendicular to each other. The positioning member 2 includes a first positioning member 9 and a plurality of second positioning members 10. The first positioning member 9 is located on the short side and close to the long side. The first positioning member 9 is used to position and fix the column reinforcement located at one corner of the frame column reinforcement. The plurality of second positioning members 10 are spaced apart on the long side. The second positioning members 10 are used to position and fix the column reinforcement located in the middle of the frame column reinforcement.

[0035] In this embodiment, the right-angled round steel is configured to include a short side and a long side that are perpendicular to each other. A first positioning element is set on the short side, and multiple second positioning elements are set at intervals on the long side. This allows the column reinforcement located at one corner and the middle of the frame column reinforcement to be positioned and fixed after the right-angled round steel is assembled, through the first and second positioning elements. This better shapes the reinforcement skeleton and prevents the root reinforcement from shifting.

[0036] In another embodiment, such as Figures 4-6 As shown, the long side is composed of multiple expansion joints. Each expansion joint includes a first steel cylinder 11 and a first steel column 12 connected end to end. Adjacent expansion joints are connected to each other through the first steel column 12 and the first steel cylinder 11. The short side is a second steel cylinder 13, which can be connected to the first steel column 12. A first limiting ring is fixed at the end of the first steel column 12 away from the first steel cylinder 11. A second limiting ring is detachably connected at the end of the first steel cylinder 11 connected to the adjacent first steel column 12. A third limiting ring is detachably connected at the end of the second steel cylinder 13 connected to the adjacent first steel column 12. The inner diameter of the second limiting ring and the third limiting ring is larger than the outer diameter of the first steel column 12 and smaller than the outer diameter of the first limiting ring. The detachable connection methods include, but are not limited to, screwing and riveting, to prevent the first steel column 12 from coming out of the corresponding first steel cylinder 11 or second steel cylinder 13.

[0037] In this embodiment, the long side is set to be composed of multiple expansion joints, each expansion joint including a first steel cylinder and a first steel column connected end to end, and the short side is set to be a second steel cylinder that can be inserted into the first steel column, so that the ends of adjacent right-angled round steel can be connected by insertion, which is convenient. In addition, the long side of the right-angled round steel can also be extended and retracted to adjust the size of the closed control hoop and meet the steel reinforcement requirements of various types of frame columns.

[0038] In another embodiment, such as Figures 4-6 As shown, a telescopic plate 14 is provided on the outer side of the long side along its length direction. One side of the telescopic plate 14 is fixedly connected to the first steel cylinder 11 connected to the short side through a connecting plate. A gap is left between one side of the telescopic plate 14 and the remaining first steel cylinder 11. Both ends of the telescopic plate 14 protrude from the long side, and adjacent telescopic plates 14 are detachably connected end to end to form a closed limiting hoop.

[0039] In this embodiment, a telescopic plate is fixed to the outside of the long side, and the telescopic plate is fixedly connected to the first steel cylinder connected to the short side by a connecting plate, but not connected to the remaining first steel cylinder and leaving a gap, so that the telescopic plate does not restrict the extension and retraction of the long side; by detachably connecting the ends of adjacent telescopic plates to form a closed limiting hoop, the size of the long side can be adjusted by adjusting the length of the telescopic plate, making the size adjustment of the closed control hoop more convenient.

[0040] In another embodiment, such as Figures 4-6 As shown, a connecting plate 15 is fixedly provided at one end of the telescopic plate 14. The connecting plate 15 has a first through hole. The other end of the telescopic plate 14 has a U-shaped sleeve 16 that cooperates with the connecting plate 15. The connecting plate 15 is inserted into the U-shaped sleeve 16. The U-shaped sleeve 16 has a pair of second through holes that communicate with the first through hole. The connecting plate 15 and the U-shaped sleeve 16 are fixedly connected by bolt and nut assemblies 17 inserted into the first through hole and the second through hole.

[0041] In this embodiment, the ends of adjacent telescopic plates are detachably connected by a connecting plate, a U-shaped sleeve plate, and a nut assembly, which is simple in structure and easy to assemble and disassemble.

[0042] In another embodiment, such as Figures 4-6 As shown, the telescopic plate 14 is equipped with a driving assembly, and the multiple telescopic sections are driven by the driving assembly to move synchronously, so that multiple second positioning parts are equally spaced on the long side of the right-angled round steel, so as to better shape the steel bars of the frame column.

[0043] In another embodiment, such as Figures 4-6 As shown, the drive assembly includes a plurality of linear actuators 18, each corresponding to one of the plurality of telescopic joints and arranged along their length. The fixed end of each linear actuator 18 is fixedly connected to an adjacent first steel cylinder 11 via a first connecting block 19, and the output end is fixedly connected to an adjacent first connecting block 19 or a second connecting block 20. The second connecting block 20 is fixedly disposed on the outer side of the short side away from the long side. The linear actuators 18 include, but are not limited to, electric push rods and cylinders, preferably electric push rods, for ease of wiring and operation. A plurality of pairs of sliders are also included, each corresponding to one of the plurality of linear actuators 18. Each pair of sliders is fixedly disposed on the side of the linear actuator 18 near the telescopic plate 14 and slidably connected to a slide groove 21 provided on the telescopic plate 14. The slide groove 21 is arranged along the length of the telescopic plate 14.

[0044] In this embodiment, multiple linear actuators are arranged at intervals along the length of the telescopic plate. Each linear actuator corresponds to a telescopic section. The fixed end of the linear actuator is fixedly connected to the corresponding first steel cylinder through a first connecting block, and the output end is fixedly connected to the adjacent first connecting block or the second connecting block located on the outside of the short side. The linear actuators are slidably connected to the length of the flue gas of the telescopic plate. By synchronously controlling the opening and closing of multiple linear actuators, the synchronous extension and retraction of multiple telescopic sections can be achieved, which is convenient for adjustment and control.

[0045] In another embodiment, such as Figure 1 , Figure 7As shown, the second positioning component 10 includes two second positioning plates 22, which are arranged opposite to each other and vertically fixed on the first steel cylinder 11. A second positioning screw hole is provided through the middle of each second positioning plate 22 along the length direction of the first steel cylinder 11. Two second arc-shaped plates 23 are arranged opposite to each other and located between the two second positioning plates 22. The upper and lower sides of each second arc-shaped plate 23 are respectively fixedly connected to the adjacent second positioning plate 22 by at least one second telescopic rod 24. Preferably, two second telescopic rods are provided on the upper and lower sides of each second arc-shaped plate 23. Two second positioning screws 25 correspond one-to-one with the two second positioning plates 22. Each second positioning screw 25 is inserted into the second positioning screw hole and rotatably connected to the adjacent second arc-shaped plate 23.

[0046] In this embodiment, the second positioning component is configured to include two second positioning plates, two second arc-shaped plates, and two second positioning screws. The two second arc-shaped plates are positioned between the two second positioning plates and fixedly connected to the adjacent second positioning plates via a second telescopic rod. One end of each of the two second positioning screws is threaded to the adjacent second positioning plate and then rotatably connected to the adjacent second arc-shaped plate. By rotating the second positioning screws, the distance between the two second arc-shaped plates can be adjusted, thereby clamping and fixing the column reinforcement. The operation is simple, and the position of the column reinforcement between the two positioning plates can be finely adjusted.

[0047] In another embodiment, such as Figure 1 As shown, the first positioning member 9 includes a first positioning plate, which is vertically fixed on the second steel cylinder 13, and a first positioning screw hole is provided through the first positioning plate along the length direction of the second steel cylinder 13; a first arc-shaped plate, which is disposed between the first positioning plate and the first steel cylinder 11, and the inner arc surface faces the first steel cylinder 11, and the upper and lower sides of the first arc-shaped plate are respectively fixedly connected to the first positioning plate by at least one first telescopic rod. Preferably, two first telescopic rods are provided on the upper and lower sides of each first arc-shaped plate; and a first positioning screw, which is inserted into the first positioning screw hole and rotatably connected to the first arc-shaped plate.

[0048] In this embodiment, the first positioning component is configured to include a first positioning plate, a first arc-shaped plate, and a first positioning screw. The first arc-shaped plate is positioned on the side of the first positioning plate closest to the first steel cylinder, with its inner arc surface facing the first steel cylinder. The first arc-shaped plate is fixedly connected to the first positioning plate via a first telescopic rod. One end of the first positioning screw is threaded to the first positioning plate and then rotatably connected to the first arc-shaped plate. By rotating the first positioning screw, the distance between the first arc-shaped plate and the first steel cylinder can be adjusted, thereby fine-tuning and positioning the relative position of the column reinforcement located at one corner of the frame column reinforcement.

[0049] The number of devices and processing capacity described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the forming device for positioning and binding reinforcing bars in frame columns according to the present invention will be readily apparent to those skilled in the art.

[0050] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A forming device for positioning and binding reinforcing bars in frame columns, characterized in that, include: Four right-angled round steel bars are connected end to end to form a closed control hoop; Multiple positioning elements are fixed at intervals on right-angled round steel and located inside the closed control hoop. The positioning elements are used to position and fix the column reinforcement after the closed control hoop is fitted into the column reinforcement. The right-angled round steel includes a short side and a long side that are perpendicular to each other. The positioning component includes a first positioning component and a plurality of second positioning components. The first positioning component is located on the short side and close to the long side. The first positioning component is used to position and fix the column reinforcement located at one corner of the frame column reinforcement. The plurality of second positioning components are spaced apart on the long side. The second positioning components are used to position and fix the column reinforcement located in the middle of the frame column reinforcement. The long side is composed of multiple expansion joints. Each expansion joint includes a first steel cylinder and a first steel column connected end to end. Adjacent expansion joints are connected to each other through the first steel column and the first steel cylinder. The short side is a second steel cylinder, which can be connected to the first steel column. A telescopic plate is provided on the outer side of the long side along its length direction. One side of the telescopic plate is fixedly connected to the first steel cylinder connected to the short side through a connecting plate. Both ends of the telescopic plate protrude from the long side, and adjacent telescopic plates are detachably connected end to end to form a closed limiting hoop. The telescopic plate is equipped with a drive assembly, and the multiple telescopic sections are driven by the drive assembly to move synchronously.

2. The forming device for positioning and binding reinforcing bars of frame columns as described in claim 1, characterized in that, One end of the telescopic plate is fixedly provided with a connecting plate, the connecting plate is provided with a first through hole, the other end of the telescopic plate is provided with a U-shaped sleeve plate that cooperates with the connecting plate, the U-shaped sleeve plate is provided with a pair of second through holes communicating with the first through hole, and the connecting plate and the U-shaped sleeve plate are fixedly connected by bolt and nut assemblies inserted into the first through hole and the second through hole.

3. The forming device for positioning and binding reinforcing bars of frame columns as described in claim 1, characterized in that, The drive assembly includes: a plurality of linear actuators, each corresponding to one of the plurality of telescopic joints and arranged along their length direction; the fixed end of each linear actuator is fixedly connected to an adjacent first steel cylinder via a first connecting block, and the output end is fixedly connected to an adjacent first connecting block or a second connecting block, the second connecting block being fixedly disposed on the outer side of the short side away from the long side; and a plurality of pairs of sliders, each corresponding to one of the plurality of linear actuators; each pair of sliders being fixedly disposed on the side of the linear actuator near the telescopic plate and slidably connected to a groove provided on the telescopic plate, the groove being arranged along the length direction of the telescopic plate.

4. The forming device for positioning and binding reinforcing bars of frame columns as described in claim 1, characterized in that, The second positioning component includes two second positioning plates, which are arranged opposite each other and vertically fixed on the first steel cylinder. Each second positioning plate has a second positioning screw hole extending through the length of the first steel cylinder. Two second arc-shaped plates are arranged opposite each other and located between the two second positioning plates. The upper and lower sides of each second arc-shaped plate are respectively fixedly connected to the adjacent second positioning plate by at least one second telescopic rod. Two second positioning screws correspond one-to-one with the two second positioning plates. Each second positioning screw is inserted into the second positioning screw hole and rotatably connected to the adjacent second arc-shaped plate.

5. The forming device for positioning and binding reinforcing bars of frame columns as described in claim 4, characterized in that, The first positioning component includes a first positioning plate, which is vertically fixed on the second steel cylinder, and a first positioning screw hole is provided through the first positioning plate along the length direction of the second steel cylinder; a first arc-shaped plate, which is disposed between the first positioning plate and the first steel cylinder, and the inner arc surface faces the first steel cylinder, and the upper and lower sides of the first arc-shaped plate are respectively fixedly connected to the first positioning plate through at least one first telescopic rod; and a first positioning screw, which is inserted into the first positioning screw hole and rotatably connected to the first arc-shaped plate.

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