Precise section steel column welding butt joint device and construction method

Abstract

The invention discloses a precise section steel column welding butt joint device which comprises a left U-shaped frame positioning mechanism, a right U-shaped frame positioning mechanism and a conical plate adjusting mechanism. The conical plate adjusting mechanism is inserted between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, and the conical plate adjusting mechanism is adjusted in the vertical direction to drive the horizontal distance between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism to be adjusted and is used for locking and installing a section steel column. According to the precise welding butt joint device for the section steel column, the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are matched with the conical plate adjusting mechanism for use, the distance of the device is conveniently adjusted, the section steel column is matched for positioning and installation, the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are matched with the upper column and the lower column of the section steel column for positioning and adjusting, and the horizontal position adjusting precision and the perpendicularity can be precisely adjusted and controlled; compared with a traditional mode that cutting is conducted after lug plate welding positioning is completed and installation is completed, the device is stable in structure and accurate in installation, the device can be repeatedly used, and production materials are saved.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and particularly to a precise welding and butt-joint device for steel columns and a construction method therefor. Background Art

[0002] With the rapid development of the economy, in order to ensure the structural stability and construction speed, steel columns are widely used in the concrete structures of building construction. The steel columns work together with the concrete, having the characteristics of high stiffness and good ductility, and are particularly suitable for large-span and high-seismic requirements scenarios.

[0003] The welding of steel columns is a key link in steel structure projects, and its quality directly affects the performance and safety of the entire structure. In traditional steel-concrete construction, the welding between steel columns is fixed by using ear plates. The upper and lower steel columns are respectively welded with ear plates, and the verticality is adjusted through the bolt connection of the ear plates, and then the welding construction is carried out. After the installation construction is completed, the ear plates are cut. The whole construction process is complex, the material waste is large, and at the same time, cutting the ear plates is likely to cause damage to the base material.

[0004] Therefore, in order to solve the above problems, a precise welding and butt-joint device for steel columns is needed to solve the above production problems. Summary of the Invention

[0005] In view of this, the precise welding and butt-joint device for steel columns of the present technical solution, through the use of the left and right U-shaped frame positioning mechanisms in cooperation with the conical plate adjusting mechanism, facilitates the adjustment of the distance between the devices and the positioning and installation of the steel columns. The left and right U-shaped frames cooperate with the upper and lower columns of the steel columns for positioning adjustment, and its horizontal position adjustment accuracy and verticality can be accurately controlled. Compared with the traditional method of using ear plate welding for positioning and then cutting after installation, the structure of this solution is stable, the installation is precise, the device can be reused, and the production materials are saved.

[0006] A precise welding and butt-joint device for steel columns includes a left U-shaped frame positioning mechanism, a right U-shaped frame positioning mechanism, and a conical plate adjusting mechanism; the conical plate adjusting mechanism is inserted between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, and the conical plate adjusting mechanism drives the horizontal distance between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism to be adjusted along the vertical direction and is used for locking and installing the steel column.

[0007] Further, the conical plate adjusting mechanism includes a conical plate body with a large upper part and a small lower part, a locking rod perpendicular to the surface of the conical plate body, and a locking member for locking and installing in cooperation with the locking rod. There are two locking rods, and the two locking rods are arranged in parallel.

[0008] Further, U-shaped plate adjustment grooves for cooperating with the adjustment and installation of the two locking rods are respectively provided on the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, and the two U-shaped plate adjustment grooves are respectively arranged in parallel corresponding to the two hypotenuses of the conical plate body.

[0009] Further, inclined steps for cooperating with the installation of the conical plate adjustment mechanism are provided on both the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism. The right U-shaped frame positioning mechanism includes a right horizontal plate assembly and a right L-shaped plate assembly. The right horizontal plate assembly and the right L-shaped plate assembly are inserted and installed and the whole presents a U-shaped structure; the overall structures of the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are the same.

[0010] Further, the right L-shaped plate assembly includes an L-shaped plate body, a horizontal wedge-shaped positioning plate, a vertical wedge-shaped positioning plate, a rear cone positioning table formed on the rear end face of the L-shaped plate body, and an L-shaped plate installation table protruding from the front end of the L-shaped plate body; a horizontal opening for installing the horizontal wedge-shaped positioning plate is formed on the rear end face of the L-shaped plate body.

[0011] Further, the horizontal opening is arranged above the rear cone positioning table. The rear cone positioning table is provided with a vertical opening in the vertical direction. The horizontal wedge-shaped positioning plate is provided with a vertical strip-shaped opening for cooperating with the vertical opening. The horizontal wedge-shaped positioning plate is inserted into the horizontal opening and used for supporting the steel column. The vertical wedge-shaped positioning plate is inserted into the vertical strip-shaped opening and cooperates with the horizontal wedge-shaped positioning plate to form a "cross" support structure. A reinforcing rib plate is arranged between the rear cone positioning table and the L-shaped plate body.

[0012] Further, the L-shaped plate installation table includes an upper installation table and a lower installation table which have the same structure and are arranged in parallel. Conical positioning grooves for cooperating with the insertion and installation of the right horizontal plate assembly are provided on both the upper installation table and the lower installation table.

[0013] Further, the right horizontal plate assembly includes a right horizontal plate body, a right-angle positioning rod, and a handrail arranged on the right horizontal plate body. Right-angle installation holes for installing the right-angle positioning rod are provided on both the right horizontal plate body and the right L-shaped plate assembly.

[0014] Further, a wedge-shaped cushion block for cooperating with the right U-shaped frame positioning mechanism and the left U-shaped frame positioning mechanism is further included. Inclined openings for cooperating with the wedge-shaped cushion block are provided on both the right U-shaped frame positioning mechanism and the left U-shaped frame positioning mechanism. A cushion block slot is formed at the upper end of the wedge-shaped cushion block. Horizontal slots for welding the steel column are provided on both the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism.

[0015] A construction method of a precise welding and docking device for a steel column includes the following steps:

[0016] S1: Lift and place the lower column of the profiled steel column in place, and pre-install the left U-shaped frame positioning mechanism, the right transverse plate assembly, and the right L-shaped plate assembly in cooperation with the upper end of the lower column of the profiled steel column.

[0017] S2: Adjust the conical plate adjusting mechanism so that the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are locked to the lower column of the profiled steel column, install the right-angle positioning rod, and check whether the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are at the same horizontal height.

[0018] S3: Adjust the horizontal wedge-shaped positioning plate and the vertical wedge-shaped positioning plate, lift the upper column of the profiled steel column onto the horizontal wedge-shaped positioning plate, adjust the wedge-shaped cushion block to the appropriate position to clamp the upper column of the profiled steel column, and lock the vertical wedge-shaped positioning plate.

[0019] S4: Weld the upper column and the lower column of the profiled steel column through the transverse slotted positions on the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism.

[0020] S5: Remove the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, and perform supplementary welding on the un-welded positions of the upper column and the lower column of the profiled steel column to ensure the welding quality.

[0021] The beneficial effects of the present invention are:

[0022] The profiled steel column precise welding and butt-joint device of the present technical solution, through the use of the left and right U-shaped frame positioning mechanisms in cooperation with the conical plate adjusting mechanism, facilitates the adjustment of the distance of the device and the positioning and installation in cooperation with the profiled steel column. Through the positioning and adjustment of the left and right U-shaped frames in cooperation with the upper and lower columns of the profiled steel column, the horizontal position adjustment accuracy and verticality can be precisely controlled. Compared with the traditional method of using ear plate welding for positioning and then cutting after installation, the structure of this solution is stable, the installation is precise, the device can be reused, and production materials are saved. Description of the Drawings

[0023] The present invention will be further described below with reference to the drawings and embodiments:

[0024] Figure 1 It is the overall installation schematic diagram of the present invention;

[0025] Figure 2 It is the front axonometric schematic diagram of the present invention;

[0026] Figure 3 It is the rear exploded schematic diagram of the present invention. Specific Embodiments

[0027] Figure 1 It is the overall installation schematic diagram of the present invention; Figure 2 It is the front axonometric schematic diagram of the present invention; Figure 3Schematic diagram of the explosion on the back of the present invention; As shown in the figure, a precision welding docking device for a profiled steel column includes a left U-shaped frame positioning mechanism 1, a right U-shaped frame positioning mechanism 2, and a conical plate adjusting mechanism 3 (left and right in the Figure 2 left and right directions in the figure); The conical plate adjusting mechanism 3 is inserted between the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2. The conical plate adjusting mechanism 3 adjusts along the vertical direction to drive the horizontal distance between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism to be adjusted and is used to lock and install the profiled steel column; For the precision welding docking device of the profiled steel column in this technical solution, by using the left and right U-shaped frame positioning mechanisms in cooperation with the conical plate adjusting mechanism, it is convenient to adjust the distance of the device and cooperate with the positioning and installation of the profiled steel column. By using the left and right U-shaped frames to cooperate with the upper and lower columns of the profiled steel column for positioning and adjustment, the horizontal position adjustment accuracy and verticality can be accurately controlled. Compared with the traditional method of using ear plate welding for positioning and then cutting after installation, the structure of this solution is stable, the installation is accurate, the device can be reused, and production materials are saved.

[0028] When the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2 are used, they are respectively used to fix both sides of the profiled steel column to ensure the stability of the profiled steel column during the welding process. Through the adjustment in the vertical direction, the conical plate adjusting mechanism 3 can accurately control the horizontal distance between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, thereby realizing the precise positioning and locking of the profiled steel column. Through the vertical adjustment function of the conical plate adjusting mechanism, the complexity and material waste problems brought by using ear plates for fixing during the traditional profiled steel column welding process are solved, the welding efficiency and accuracy are improved, and at the same time, the risk of damage to the base material is reduced.

[0029] In this embodiment, the conical plate adjusting mechanism 3 includes a conical plate body 31 with a larger upper part and a smaller lower part, a locking rod 32 perpendicular to the surface of the conical plate body, and a locking member (which can adopt a butterfly nut) for locking and installing in cooperation with the locking rod (using a locking screw). There are two locking rods 32, and the two locking rods 32 are arranged parallel to each other. The design of the conical plate body 31 makes its upper part wider and its lower part narrower, which is convenient for adjusting the horizontal distance between the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2 during the adjustment process. The locking rod 32 is perpendicular to the surface of the conical plate body 31, and the two locking rods are arranged parallel to each other. This design ensures that uniform force can be applied during the locking process, avoiding deformation or loosening caused by uneven force. Through the design of the conical plate adjusting mechanism, the horizontal distance between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism is adjusted, and the profiled steel column can be effectively locked and installed.

[0030] In this embodiment, U-shaped plate adjusting grooves 321 for adjusting and installing in cooperation with the two locking rods are respectively provided on the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2. The two U-shaped plate adjusting grooves 321 are respectively arranged parallel to the two hypotenuses of the conical plate body 31.

[0031] The conical plate body 31 (which is an isosceles trapezoidal plate structure with a larger upper part and a smaller lower part as a whole. Of course, setting it as a triangle can also achieve its function). The U-shaped plate adjustment groove 321 on the left U-shaped frame positioning mechanism 1 is parallel to the left hypotenuse of the corresponding conical plate body 31 (the two may not be completely parallel, and an inclination angle of 3-5° can be correspondingly set to further enhance the locking effect of the overall structure when locked). The right U-shaped frame positioning mechanism 1 also adopts the corresponding setting method. When the conical plate body 31 is adjusted upward in the vertical direction, the distance between the left and right U-shaped frame positioning mechanisms decreases, and vice versa. When the conical plate body 31 is adjusted to the appropriate position, due to the U-shaped plate adjustment groove 321 being inclined relative to the vertical direction, its locking effect in the vertical direction is improved.

[0032] In this embodiment, inclined surface steps 12 for cooperating with the conical plate adjusting mechanism to be installed are provided on both the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2. The right U-shaped frame positioning mechanism 2 includes a right horizontal plate assembly and a right L-shaped plate assembly. The right horizontal plate assembly and the right L-shaped plate assembly are inserted and installed and the whole is in a U-shaped structure. The overall structures of the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are the same. The right U-shaped frame positioning mechanism 2 adopts a detachable structure, which is convenient for disassembly after the overall structure installation and cooperation with the steel column construction. The design of the inclined surface steps 12 enables the conical plate adjusting mechanism 3 to be more stably installed between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, ensuring more precise adjustment in the vertical direction. The overall structures of the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are the same, which is convenient for production and maintenance, and also ensures the symmetry and consistency of the left and right sides.

[0033] In this embodiment, the right L-shaped plate assembly includes an L-shaped plate body 41, a transverse wedge-shaped positioning plate 47, a vertical wedge-shaped positioning plate 49, a rear cone positioning table 44 formed on the rear end face of the L-shaped plate body 41, and an L-shaped plate installation table protruding from the front end of the L-shaped plate body (including an upper installation table 43 and a lower installation table 42). A transverse opening 48 for installing the transverse wedge-shaped positioning plate is provided on the rear end face of the L-shaped plate body 41. The right L-shaped plate assembly is in an L-shaped structure as a whole. Its front end protrudes to form an L-shaped plate installation table, which is inserted and installed in cooperation with the right horizontal plate assembly. A rear cone positioning table 44 is formed on the rear end face, which is cooperated with the transverse wedge-shaped positioning plate 47 and the vertical wedge-shaped positioning plate 49 to adjust the installation to ensure the installation stability of the upper column of the steel column.

[0034] In this embodiment, the horizontal opening 48 is formed above the rear cone positioning platform 44. The rear cone positioning platform 44 is provided with a vertical opening 46 in the vertical direction. The horizontal wedge-shaped positioning plate 47 is provided with a vertical strip-shaped opening 50 for cooperating with the vertical opening. The horizontal wedge-shaped positioning plate 47 is inserted into the horizontal opening 48 and is used to support the steel column (upper column). The vertical wedge-shaped positioning plate 49 is inserted into the vertical strip-shaped opening 50 and cooperates with the horizontal wedge-shaped positioning plate 47 to form a "cross" support structure. A reinforcing rib plate 45 is arranged between the rear cone positioning platform 44 and the L-plate body 41. The setting of the horizontal opening 48 enables the horizontal wedge-shaped positioning plate 47 to be inserted through this opening, thereby realizing the support of the steel column. The opening of the vertical opening allows the vertical wedge-shaped positioning plate to be inserted into the U-shaped frame positioning mechanism to form an effective support for the steel column. The upper surface of the horizontal wedge-shaped positioning plate 47 is an inclined surface. After being inserted into the horizontal opening 48, the insertion depth is adjusted to make the position between the upper and lower columns of the steel column more accurate to meet the construction requirements. After being adjusted to the appropriate position, the vertical wedge-shaped positioning plate 49 is inserted through the vertical strip-shaped opening 50 and the vertical opening 46 to form a stable "cross" support structure, ensuring the installation stability and adjustment accuracy of the overall structure and preventing the structure from loosening due to vibration or external force during the welding process. As a load-bearing member, the setting of the reinforcing rib plate 45 further improves the connection strength between the rear cone positioning platform and the L-plate body, ensuring the stability of the overall structure.

[0035] In this embodiment, the L-plate installation platform includes an upper installation platform 43 and a lower installation platform 42 that are identical in structure and arranged in parallel. The upper installation platform 43 and the lower installation platform 42 are both provided with tapered positioning grooves for cooperating with the plug-in installation of the right transverse plate assembly. The upper installation platform and the lower installation platform have the same structure and are arranged in parallel. This design makes the installation process more convenient and can ensure the symmetry and stability of the installation. The upper installation platform and the lower installation platform are both provided with tapered positioning grooves, which are used for plug-in installation with the right transverse plate assembly. Through the tapered design, accurate positioning can be achieved and the firmness of the installation can be enhanced. The design of the tapered positioning groove can also effectively reduce the error during the installation process and ensure the accurate docking of the steel column. The parallel arrangement of the upper installation platform 43 and the lower installation platform 42 can ensure the consistent installation position of the right transverse plate assembly and avoid the docking deviation of the steel column caused by the inconsistent height of the installation platform. The design of the tapered positioning groove can not only achieve quick plug-in but also automatically adjust the position during the installation process to ensure the close fit between the right transverse plate assembly and the L-plate installation platform.

[0036] In this embodiment, the right cross - plate assembly includes a right cross - plate body, a right - angle positioning rod 6, and a handrail 5 provided on the right cross - plate body. Right - angle mounting holes for installing the right - angle positioning rod are provided on the right cross - plate body and the right L - plate assembly. The right cross - plate body, as the main part of the right cross - plate assembly, is structurally designed for plug - in installation with the right L - plate assembly. The right - angle positioning rod is used to ensure the right - angle positioning between the right cross - plate body and the right L - plate assembly during the installation process, thereby improving the installation accuracy. The handrail is provided on the right cross - plate body to facilitate the operator to carry and adjust during the installation process. The right - angle mounting holes are provided on the right cross - plate body and the right L - plate assembly for installing the right - angle positioning rod to ensure the firm connection between the two.

[0037] In this embodiment, it further includes a wedge - shaped cushion block 71 for cooperating with the right U - shaped frame positioning mechanism and the left U - shaped frame positioning mechanism. Oblique openings 7 for cooperating with the wedge - shaped cushion block are provided on both the right U - shaped frame positioning mechanism and the left U - shaped frame positioning mechanism. A cushion - block slot 72 is formed at the upper end of the wedge - shaped cushion block 71. Transverse slots C for welding the steel column are provided on both the left U - shaped frame positioning mechanism and the right U - shaped frame positioning mechanism.

[0038] The design of the wedge - shaped cushion block 71 enables it to closely cooperate with the right U - shaped frame positioning mechanism and the left U - shaped frame positioning mechanism through the oblique opening during the installation process, for fine - tuning the position of the steel column, further improving the installation accuracy, and also ensuring the stability of the steel column during the welding process. The design of the transverse slot C facilitates the welding operation. The wedge - shaped cushion block can be adjusted to adapt to steel columns of different sizes by adjusting its position in the oblique opening for fine - tuning, thereby improving the versatility of the device. The shape of the cushion - block slot can be adjusted according to actual needs, such as using a V - shaped or U - shaped groove, to facilitate the removal of the wedge - shaped cushion block 71 through the cushion - block slot 72 after the construction is completed. By introducing the wedge - shaped cushion block, the position accuracy of the steel column during the welding process is further improved, ensuring the stability of the welding.

[0039] A construction method of a precise welding and docking device for a steel column includes the following steps:

[0040] S1: Hoist the lower column B of the steel column in place, and pre - install the left U - shaped frame positioning mechanism 1, the right cross - plate assembly, and the right L - plate assembly in cooperation with the upper end of the lower column B of the steel column;

[0041] S2: Adjust the conical - plate adjusting mechanism 3 so that the left U - shaped frame positioning mechanism and the right U - shaped frame positioning mechanism are locked to the lower column of the steel column, install the right - angle positioning rod 6, and check whether the left U - shaped frame positioning mechanism and the right U - shaped frame positioning mechanism are at the same horizontal height;

[0042] S3: Adjust the horizontal wedge positioning plate 47 and the vertical wedge positioning plate 79. Hoist the upper column A of the steel section column onto the horizontal wedge positioning plate, adjust the wedge-shaped spacer 71 to a proper position to clamp the upper column A of the steel section column, and lock the vertical wedge positioning plate. Hoist the upper column A of the steel section column onto the horizontal wedge positioning plate 47 to adjust its position. After adjusting to the proper position, lock and install the vertical wedge positioning plate 79, check whether the verticality of the steel column meets the requirements, and then make fine adjustments through the wedge-shaped spacer 71 to ensure that the final installation position is met (the same method is adopted for multiple welding positions of the steel section column to ensure the construction accuracy of the overall structure).

[0043] S4: Weld the upper column and the lower column of the steel section column through the horizontal slot C positions on the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2. Weld the positions between the upper and lower columns of the steel section column through the horizontal slot C positions to achieve preliminary welding positioning between the upper and lower columns of the steel section column.

[0044] S5: Remove the left U-shaped frame positioning mechanism 1 and the right U-shaped frame positioning mechanism 2, and repair weld the unwelded positions of the upper column and the lower column of the steel section column to ensure the welding quality. First, remove the right U-shaped frame positioning mechanism 2 and then remove the other structures one by one, and repair weld the unwelded positions between the upper and lower columns of the steel column to ensure that the overall structure is welded in place.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A precise welding butt joint device for a profiled steel column, characterized in that: It includes a left U-shaped frame positioning mechanism, a right U-shaped frame positioning mechanism, and a tapered plate adjusting mechanism; the tapered plate adjusting mechanism is inserted between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, and the tapered plate adjusting mechanism adjusts the horizontal distance between the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism in the vertical direction and is used to lock and install the steel column.

2. The precision welding butt joint device for profiled steel columns according to claim 1, characterized in that: The tapered plate adjusting mechanism includes a tapered plate body with a larger upper part and a smaller lower part, a locking rod perpendicular to the surface of the tapered plate body, and a locking piece for locking and installing in cooperation with the locking rod. There are two locking rods and the two locking rods are arranged parallel to each other.

3. The precise welding and butt joint device for profiled steel columns according to claim 2, characterized in that: The left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are respectively provided with U-shaped plate adjusting grooves for adjusting and installing in cooperation with the two locking rods. The two U-shaped plate adjusting grooves are respectively arranged parallel to the two hypotenuses of the tapered plate body.

4. The precise welding and butt-joint device for profiled steel columns according to claim 1, wherein: The left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are both provided with inclined steps for installing in cooperation with the tapered plate adjusting mechanism. The right U-shaped frame positioning mechanism includes a right horizontal plate assembly and a right L-shaped plate assembly. The right horizontal plate assembly and the right L-shaped plate assembly are inserted and installed and the whole is in a U-shaped structure; the overall structures of the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are the same.

5. The precise welding butt joint device for profiled steel columns according to claim 4, wherein: The right L-shaped plate assembly includes an L-shaped plate body, a horizontal wedge-shaped positioning plate, a vertical wedge-shaped positioning plate, a rear cone positioning table formed on the rear end face of the L-shaped plate body, and an L-shaped plate installation table protruding from the front end of the L-shaped plate body; a horizontal opening for installing the horizontal wedge-shaped positioning plate is opened on the rear end face of the L-shaped plate body.

6. The precision welding butt joint device for profiled steel columns according to claim 5, characterized in that: The horizontal opening is opened above the rear cone positioning table. The rear cone positioning table is provided with a vertical opening in the vertical direction. The horizontal wedge-shaped positioning plate is provided with a vertical strip-shaped opening for cooperating with the vertical opening. The horizontal wedge-shaped positioning plate is inserted into the horizontal opening and is used to support the steel column. The vertical wedge-shaped positioning plate is inserted into the vertical strip-shaped opening and cooperates with the horizontal wedge-shaped positioning plate to form a "cross" support structure. A reinforcing rib plate is arranged between the rear cone positioning table and the L-shaped plate body.

7. The precise welding and butt-joint device for profiled steel columns according to claim 5, characterized in that: The L-shaped plate installation table includes an upper installation table and a lower installation table with the same structure and arranged parallel to each other. The upper installation table and the lower installation table are both provided with tapered positioning grooves for cooperating with the insertion and installation of the right horizontal plate assembly.

8. The precision welding butt joint device for profiled steel columns according to claim 4, wherein: The right horizontal plate assembly includes a right horizontal plate body, a right-angle positioning rod, and a handrail arranged on the right horizontal plate body. The right horizontal plate body and the right L-shaped plate assembly are provided with right-angle installation holes for installing the right-angle positioning rod.

9. The precision welding and butt joint device for profiled steel columns according to claim 1, characterized in that: It also includes a wedge-shaped cushion block for cooperating with the right U-shaped frame positioning mechanism and the left U-shaped frame positioning mechanism. The right U-shaped frame positioning mechanism and the left U-shaped frame positioning mechanism are both provided with inclined openings for cooperating with the wedge-shaped cushion block. The upper end of the wedge-shaped cushion block is formed with a cushion block slot. The left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are both provided with horizontal slots for welding the steel column.

10. A construction method of the precise welding butt joint device for the profiled steel column according to any one of claims 1-9, characterized in that, It includes the following steps: S1: Hoist the lower column of the steel column in place, and pre-install the left U-shaped frame positioning mechanism, the right horizontal plate assembly, and the right L-shaped plate assembly in cooperation with the upper end of the lower column of the steel column. S2: Adjust the conical plate adjusting mechanism to lock the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism to the lower column of the steel column. Install the right-angle positioning rod and check whether the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism are at the same horizontal height; S3: Adjust the horizontal wedge-shaped positioning plate and the vertical wedge-shaped positioning plate. Lift the upper column of the steel column onto the horizontal wedge-shaped positioning plate, adjust the wedge-shaped spacer to the appropriate position to keep the upper column of the steel column in a clamped state, and lock the vertical wedge-shaped positioning plate; S4: Weld the upper column of the steel column and the lower column of the steel column through the horizontal grooved positions on the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism; S5: Remove the left U-shaped frame positioning mechanism and the right U-shaped frame positioning mechanism, and perform repair welding on the unwelded positions of the upper column of the steel column and the lower column of the steel column to ensure the welding quality.

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