Steel structure column joint structure with variable cross section

Abstract

The invention relates to the technical field of constructional engineering, in particular to a steel structure column joint structure with a variable cross section. The technical problems that in the prior art, variable-section steel can generate elastic deformation in the hoisting process, so that the variable-section steel cannot be connected with a stand column, and the steps of spiral connection are tedious are solved. A steel structure column joint structure with a variable cross section comprises a stand column, variable cross section steel is arranged on one side of the stand column, the steel structure column joint structure further comprises a lifting mechanism, the lifting mechanism comprises a vertical rail, the vertical rail is fixedly connected to one side of the stand column, and a sliding frame is connected into the vertical rail in a sliding mode. Through the design of a lifting mechanism, when the variable-section steel extrudes the folding plate, two push shafts can make contact with and extrude the top face of the inner wall of the variable-section steel, so that the elasticity of the variable-section steel is recovered, the outer wall of the variable-section steel is extruded through a correction rod, the left side and the right side of the variable-section steel can be aligned with the left side and the right side of the stand column, and the correction accuracy is improved. And quick positioning of the connecting surface of the variable-section steel and the upright post is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a steel structure column node structure with a variable cross-section. Background Art

[0002] Variable cross-section steel structure is a special profile commonly seen in steel structures and construction engineering. Its cross-sectional dimensions change along the length direction. By dynamically adjusting the cross-sectional dimensions along the length direction of the member, the cross-section is only increased in the key stress areas to meet different stress requirements and save materials. It is applicable to scenarios such as large-span factories, workshops, and bridges.

[0003] Although the shapes of variable cross-section steel structures and equal cross-section steel structures are different, they are also fastened and connected by bolts during installation. Compared with equal cross-section steel structures, the variable cross-section steel structure used as a crossbeam has a very large span. When the variable cross-section steel structure is hoisted, it will produce a certain degree of elastic deformation, resulting in the inability to connect the variable cross-section steel structure with the column. In order to ensure the connection reliability between the variable cross-section steel structure and the column, more bolts need to be used for connection, and the working steps are cumbersome and the efficiency is low. Summary of the Invention

[0004] In order to overcome the shortcomings that the variable cross-section steel will produce elastic deformation during the hoisting process, resulting in the inability to connect the variable cross-section steel with the column, and the screw connection steps are cumbersome, the present invention provides a steel structure column node structure with a variable cross-section.

[0005] The technical solution is as follows: A steel structure column node structure with a variable cross-section includes a column. A variable cross-section steel is arranged on one side of the column. It also includes a lifting mechanism. The lifting mechanism includes a vertical track. The vertical track is fixedly connected to one side of the column. A sliding frame is slidably connected in the vertical track. A compression spring is arranged between the sliding frame and the vertical track. First guide rails are symmetrically fixedly connected to the bottom of the sliding frame. An expansion rod is slidably connected in the first guide rail. A push shaft is fixedly connected through the outer wall of the telescopic end of the expansion rod. The push shaft is used in cooperation with the variable cross-section steel. Correction rods are symmetrically hinged on both sides of the sliding frame. A torsion spring is arranged between the correction rod and the sliding frame.

[0006] As a further preferred solution, the lifting mechanism further includes a slider. The slider is slidably connected in the sliding frame. A folding plate is jointly hinged between the slider and the sliding frame. A first tension spring is arranged between the slider and the sliding frame. Vertical shafts are symmetrically hinged on both sides of the folding plate. Slide rods are symmetrically slidably connected to both sides of the sliding frame. The vertical shafts are slidably connected through the slide rods. A connecting block is fixedly sleeved on the outer wall of the fixed end of the expansion rod. A horizontal shaft is fixedly connected to one side of the slide rod. One end of the horizontal shaft is slidably connected through the connecting block.

[0007] As a further preferred solution, the lifting mechanism further includes a second guide rail, the second guide rail is fixedly connected to the first guide rail, and one end of the push shaft is clamped into the second guide rail and slides therein.

[0008] As a further preferred solution, it further includes a telescopic plate, the telescopic plates are symmetrically hinged to the outer wall of the folding plate, and the telescopic plates are used in cooperation with the correction rod.

[0009] As a further preferred solution, it further includes a limiting mechanism. The limiting mechanism includes a first elastic wedge-shaped block. A chute is opened on one side of the column, and the first elastic wedge-shaped block is slidably connected in the chute. A T-shaped groove is penetrated through one side of the sliding frame, and the first elastic wedge-shaped block is clamped into the T-shaped groove and slides therein. A sliding rod is slidably connected in the T-shaped groove, and the sliding rod is used in cooperation with the sliding rod and the first elastic wedge-shaped block respectively.

[0010] As a further preferred solution, the limiting mechanism further includes a special-shaped rod. The special-shaped rods are symmetrically slidably connected to the inner wall of the column. A second tension spring is arranged between the special-shaped rod and the inner wall of the column. A rectangular plate is arranged on one side of the special-shaped rod. A plurality of uniformly distributed round holes are penetrated through one side of the rectangular plate, and pins are movably connected in the plurality of round holes.

[0011] As a further preferred solution, the limiting mechanism further includes a pressing rod. The pressing rods are symmetrically fixedly connected to both sides of the variable cross-section steel, and the pressing rods are used in cooperation with the special-shaped rods.

[0012] As a further preferred solution, it further includes a limiting plate. The limiting plates are symmetrically fixedly connected to the inner wall of the column. A third tension spring is arranged between the rectangular plate and the limiting plate. A limiting block is fixedly connected to the outer wall of the pin in a penetrating manner. A plurality of uniformly distributed first limiting holes are penetrated through one side of the limiting plate. Two groups of second limiting holes are penetrated through one side of the column and the variable cross-section steel respectively. The pin and the limiting block are both clamped into the first limiting hole and the second limiting hole and slide therein.

[0013] As a further preferred solution, it further includes a convex block. The convex blocks are fixedly connected to the inner walls of the plurality of round holes of the rectangular plate. A spiral groove is opened on the outer wall of the pin, and the convex block is clamped into the spiral groove and slides therein.

[0014] As a further preferred solution, it further includes a plug-in board. The plug-in board is symmetrically and fixedly connected to the inner wall of the variable-section steel. A plurality of uniformly distributed special-shaped holes are penetratingly opened on one side of the plug-in board. The insertion pin and the limiting block are snapped into the special-shaped holes and slide therein. A plurality of second elastic wedge-shaped blocks are slidably connected in the special-shaped holes. A groove for cooperating with the second elastic wedge-shaped block is opened on the outer wall of the limiting block.

[0015] The present invention has the following advantages: 1. Through the design of the lifting mechanism of the present invention, when the variable-section steel squeezes the folding plate, the two push shafts can contact and squeeze the top surface of the inner wall of the variable-section steel, so that the variable-section steel elastically recovers. And by squeezing the outer wall of the variable-section steel with the correction rod, the left and right sides of the variable-section steel can be aligned with the left and right sides of the column, realizing the rapid positioning of the connection surface between the variable-section steel and the column.

[0016] 2. Through the design of the limiting mechanism of the present invention, when the third tension spring contracts, the insertion pin and the limiting block cannot rotate by the limiting block fitting with the inner walls of the first limiting hole and the second limiting hole. When the limiting block fits with the inner wall of the special-shaped hole, the convex block can make the limiting block rotate in the special-shaped hole by squeezing the spiral groove of the insertion pin. By the second elastic wedge-shaped block being snapped into the groove of the limiting block, the limiting block can be limited, thus realizing the rapid locking of the column and the variable-section steel. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a schematic diagram of the shape of the variable-section steel before and after elastic deformation occurs in the present invention; Figure 3 is a schematic structural diagram of the lifting mechanism of the present invention; Figure 4 is a schematic installation diagram at the vertical shaft of the present invention; Figure 5 is a schematic installation diagram at the sliding rod of the present invention; Figure 6 is a schematic installation diagram at the first guide rail of the present invention; Figure 7 is a schematic installation diagram at the telescopic plate of the present invention; Figure 8 is a schematic structural diagram of the limiting mechanism of the present invention; Figure 9 is a schematic installation diagram at the special-shaped rod of the present invention; Figure 10 is a schematic installation diagram at the second elastic wedge-shaped block of the present invention; Figure 11 is a schematic installation diagram at the limiting block of the present invention.

[0018] Names of the reference numerals in the figure: 1 - Column, 101 - Variable cross-section steel, 201 - Vertical track, 202 - Sliding frame, 203 - First guide rail, 204 - Telescopic rod, 205 - Pushing shaft, 206 - Straightening rod, 301 - Slide block, 302 - Folding plate, 303 - Vertical shaft, 304 - Slide bar, 305 - Connecting block, 401 - Second guide rail, 501 - Telescopic plate, 601 - First elastic wedge block, 602 - Sliding rod, 701 - Special-shaped rod, 702 - Rectangular plate, 703 - Plug pin, 801 - Pressing rod, 901 - Limiting plate, 902 - Limiting block, 1001 - Protrusion, 1101 - Insertion plate, 1102 - Second elastic wedge block. Detailed implementation manners

[0019] The technical solution will be further described below in conjunction with specific embodiments. It should be noted that: The words indicating directions such as up, down, left, and right in this article are only in terms of the positions of the shown structures in the corresponding drawings. The serial numbers assigned to the components in this article itself, for example: first, second, etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And as used in this application: connection, coupling, unless otherwise specified, all include direct and indirect connection (coupling).

[0020] Embodiment 1 A steel structure column node structure with variable cross-section, as Figure 1 shown in Figures 3 - 6 includes a column 1, a variable cross-section steel 101 is arranged on the front side of the column 1, and a lifting mechanism is further included. The lifting mechanism includes a vertical track 201, the vertical track 201 is fixedly connected to the front side of the column 1, a sliding frame 202 is vertically slidably connected in the vertical track 201, a compression spring is arranged between the sliding frame 202 and the vertical track 201, the bottom of the sliding frame 202 is symmetrically and fixedly connected with first guide rails 203 on the left and right, a telescopic rod 204 is horizontally slidably connected in the first guide rails 203, the outer wall of the telescopic end of the telescopic rod 204 is fixedly connected throughly with a pushing shaft 205, the pushing shaft 205 is used in cooperation with the variable cross-section steel 101, and the pushing shaft 205 is used to apply a thrust to the top inner wall of the variable cross-section steel 101 to elastically restore the variable cross-section steel 101. Correction rods 206 are symmetrically hinged on both sides of the sliding frame 202, a torsion spring is arranged between the correction rods 206 and the sliding frame 202, and the correction rods 206 are in contact with the variable cross-section steel 101 after rotation.

[0021] shown in Figures 4 - 6As shown in the figure, the lifting mechanism further includes a slider 301. The slider 301 is slidably connected within the sliding frame 202. A folding plate 302 is jointly hinged between the top of the slider 301 and the top of the sliding frame 202. A first tension spring is provided between the slider 301 and the sliding frame 202. Vertical shafts 303 are symmetrically hinged on both sides of the folding plate 302. Slide bars 304 are symmetrically and horizontally slidably connected to the left and right sides of the sliding frame 202. The vertical shafts 303 are slidably connected to the slide bars 304 in a penetrating manner. When the folding plate 302 moves, it can drive the slide bars 304 to move horizontally through the vertical shafts 303. A connecting block 305 is fixedly sleeved on the lower part of the outer wall of the fixed end of the telescopic rod 204. A horizontal shaft is fixedly connected to one side of the slide bar 304. One end of the horizontal shaft is slidably connected to the connecting block 305 in a penetrating manner. When the slide bar 304 moves, it can drive the telescopic rod 204 to move through the horizontal shaft and the connecting block 305.

[0022] As Figure 5 shown in the figure, the lifting mechanism further includes a second guide rail 401. The second guide rail 401 is fixedly connected to the first guide rail 203. One end of the push shaft 205 is inserted into the second guide rail 401 and slides therein. When the push shaft 205 slides along the second guide rail 401, it can cause the telescopic end of the telescopic rod 204 to contract.

[0023] As Figure 7 shown in the figure, it further includes a telescopic plate 501. Telescopic plates 501 are symmetrically hinged to the left and right sides of the outer wall of the folding plate 302. The telescopic plates 501 are L-shaped. The telescopic ends of the telescopic plates 501 extend and contract along the horizontal direction. The telescopic plates 501 are used in cooperation with the correction rod 206. When the fixed ends of the telescopic plates 501 move downward, it can cause the correction rod 206 to rotate.

[0024] As Figure 8 shown in the figure, it further includes a limiting mechanism. The limiting mechanism includes a first elastic wedge-shaped block 601. A chute is provided on the front side of the column 1. The first elastic wedge-shaped block 601 is horizontally slidably connected within the chute. A T-shaped groove is penetrated and provided on the rear side of the sliding frame 202. The first elastic wedge-shaped block 601 is inserted into the T-shaped groove and slides therein. The first elastic wedge-shaped block 601 is used to limit the sliding frame 202. A slide bar 602 is horizontally slidably connected within the T-shaped groove. The slide bar 602 is used in cooperation with the slide bar 304 and the first elastic wedge-shaped block 601. There is friction between the slide bar 602 and the slide bar 304.

[0025] As Figure 8 As Figure 9 shown in the figure, the limiting mechanism further includes a special-shaped rod 701. The special-shaped rods 701 are symmetrically and vertically slidably connected to the inner walls of the column 1. A second tension spring is provided between the special-shaped rods 701 and the inner walls of the column 1. A rectangular plate 702 is provided on the rear side of the special-shaped rod 701. The special-shaped rod 701 is used to limit the rectangular plate 702. Four uniformly distributed round holes are penetrated and provided on one side of the rectangular plate 702. Plug pins 703 are movably connected within the four round holes.

[0026] As Figure 8 shown, the limiting mechanism further includes a pressure rod 801. The pressure rods 801 are symmetrically and fixedly connected to both sides of the variable cross-section steel 101. The pressure rod 801 is used in cooperation with the special-shaped rod 701. When the pressure rod 801 contacts and presses the special-shaped rod 701, the special-shaped rod 701 can slide downward.

[0027] As Figure 8 and Figure 9 shown, it further includes a limiting plate 901. The limiting plates 901 are symmetrically and fixedly connected to the front side of the inner wall of the column 1. A third tension spring is arranged between the rectangular plate 702 and the limiting plate 901. A limiting block 902 is fixedly connected to the outer wall of the bolt 703 in a penetrating manner. Four uniformly distributed first limiting holes are penetrated and opened on one side of the limiting plate 901. Two groups of second limiting holes are penetrated and opened on one side of both the column 1 and the variable cross-section steel 101, with four in each group. The shapes of the first limiting holes and the second limiting holes are the same. The bolt 703 and the limiting block 902 are both inserted into the first limiting holes and the second limiting holes and slide therein.

[0028] As Figure 9 shown, it further includes a convex block 1001. The convex blocks 1001 are fixedly connected to the top of the inner walls of the four circular holes of the rectangular plate 702. A spiral groove is opened on the outer wall of the bolt 703. The convex block 1001 is inserted into the spiral groove and slides therein.

[0029] As Figure 8 、 Figure 10 and Figure 11 shown, it further includes a plug-in board 1101. The plug-in boards 1101 are symmetrically and fixedly connected to the rear side of the inner wall of the variable cross-section steel 101. Four uniformly distributed special-shaped holes are penetrated and opened on one side of the plug-in board 1101. The bolt 703 and the limiting block 902 are inserted into the special-shaped holes and slide therein. A second elastic wedge block 1102 is vertically slidably connected in the special-shaped hole. A groove for cooperating with the second elastic wedge block 1102 is opened on the outer wall of the limiting block 902.

[0030] Initially, the first tension spring is in a contracted state, there is a large gap between the two push shafts 205, the first elastic wedge block 601 is snapped into the T-shaped groove of the sliding frame 202, and the top surface of the first elastic wedge block 601 is in contact with the top of the inner wall of the T-shaped groove, restricting the movement of the sliding frame 202. The third tension spring between the rectangular plate 702 and the limiting plate 901 is in an extended state, and the front end of the bolt 703 is in the same vertical plane as the front side of the column 1. First, use the hoisting equipment in the prior art to hoist the variable-section steel 101 to the upper side of the column 1. Due to the large span of the variable-section steel 101, the variable-section steel 101 in the hoisting state will produce a certain degree of elastic deformation, resulting in the rear side of the variable-section steel 101 being inclined. It is necessary to first restore the elasticity of the variable-section steel 101, and the variable-section steel 101 cannot be guaranteed to be aligned with the column 1 during the hoisting process. At this time, lower the variable-section steel 101 until it contacts the folding plate 302. The folding plate 302 unfolds downward with its own hinge point as the center under the influence of the weight of the variable-section steel 101, and drives the two vertical shafts 303 to move backward. At the same time, the folding plate 302 pushes the slider 301 to slide backward along the sliding frame 202, and drives the telescopic ends of the two telescopic plates 501 to move obliquely downward to the rear. The telescopic ends of the telescopic plates 501 extend, and drive their fixed ends to move downward, so that the fixed ends of the telescopic plates 501 squeeze the outer wall of the correction rod 206. The correction rod 206 rotates upward with the connection point of the sliding frame 202 as the center under the force, and the torsion spring contracts under the force. Taking the correction rod 206 on the left side as an example, when the position of the variable-section steel 101 is biased towards the correction rod 206 on the left side, the correction rod 206 on the left side rotates and contacts and squeezes the left side of the variable-section steel 101 after rotation, causing the variable-section steel 101 to move to the right until the variable-section steel 101 contacts the correction rod 206 on the right side. Subsequently, both correction rods 206 rotate to a vertical state and are respectively in contact with the left and right sides of the variable-section steel 101, so that the left and right sides of the variable-section steel 101 are aligned with the left and right sides of the column 1. When the slider 301 slides along the sliding frame 202, the first tension spring is stretched under the force. At the same time, the vertical shaft 303 drives the corresponding sliding rod 304 to slide backward. The sliding rod 304 drives the corresponding connecting block 305 to move through the horizontal shaft. The connecting block 305 drives the telescopic rod 204 to slide along the first guide rail 203. The two telescopic rods 204 move closer to each other, and drive the connecting block 305 to move along the horizontal axis of the sliding rod 304 towards the side close to the sliding rod 304. At the same time, the telescopic end of the telescopic rod 204 drives the push shaft 205 to move obliquely backward. The push shaft 205 slides along the corresponding second guide rail 401, and drives the telescopic end of the telescopic rod 204 to contract. Subsequently, the mutually approaching ends of the two push shafts 205 both contact the top of the inner wall of the variable-section steel 101. As the telescopic rod 204 and the push shaft 205 move, the push shaft 205 gradually exerts an upward thrust on the top of the inner wall of the variable-section steel 101, causing the variable-section steel 101 to start elastic recovery until the push shaft 205 moves to the corner of the top of the inner wall of the variable-section steel 101, and further causing the push shaft 205 to increase the backward pulling force on the variable-section steel 101.The variable cross-section steel 101 continues to elastically recover under force. Subsequently, the end of the sliding rod 304 contacts the end of the sliding bar 602, and drives the sliding bar 602 to slide backward along the T-shaped groove of the sliding frame 202 by friction with the sliding bar 602. The sliding bar 602 pushes the first elastic wedge block 601 to slide backward until the fixed end of the telescopic rod 204 slides to the rear end of the first guide rail 203, and the pushing shaft 205 slides to the lower end of the second guide rail 401. Under the action of the pushing shaft 205, the variable cross-section steel 101 completes elastic recovery, making the rear side of the variable cross-section steel 101 vertical, which is convenient for subsequent connection between the variable cross-section steel 101 and the column 1. At the same time, the top surface of the first elastic wedge block 601 no longer contacts the inner wall top surface of the T-shaped groove, enabling the sliding frame 202 to move. The weight of the variable cross-section steel 101 is applied to the sliding frame 202 through the folding plate 302. The sliding frame 202 slides downward along the vertical track 201 under force, and the compression spring contracts under force. Subsequently, the bottom of the pressure rod 801 contacts and presses against the top end of the corresponding special-shaped rod 701. The special-shaped rod 701 slides downward under force, and the second tension spring extends under force. Subsequently, the special-shaped rod 701 no longer contacts the front side of the rectangular plate 702. After the rectangular plate 702 is released from the restriction, it can move. The third tension spring contracts and drives the rectangular plate 702 to move forward, causing the convex block 1001 to press against the inner wall of the spiral groove of the adjacent plug pin 703. It should be noted that since the limiting block 902 fits with the inner wall of the first limiting hole of the limiting plate 901, the first limiting hole can prevent the plug pin 703 from rotating through the limiting block 902. At this time, the spiral groove of the plug pin 703 is pressed by the convex block 1001, causing the plug pin 703 and the limiting block 902 to slide forward along the corresponding first limiting hole. Subsequently, the plug pin 703 and the limiting block 902 slide through the second limiting hole of the column 1 and the variable cross-section steel 101 and enter the corresponding special-shaped hole on the plugging plate 1101. The front inclined surface of the limiting block 902 fits with the inner wall of the special-shaped hole. At this time, under the pressing action of the convex block 1001 on the spiral groove, the plug pin 703 drives the limiting block 902 to rotate in the special-shaped hole. Subsequently, the limiting block 902 contacts and presses against the wedge surface of the adjacent second elastic wedge block 1102. The second elastic wedge block 1102 contracts and slides under force until the second elastic wedge block 1102 aligns with the groove of the limiting block 902. The second elastic wedge block 1102 releases and slides into the groove, thereby limiting the limiting block 902 and preventing the plug pin 703 from rotating. At this time, the outer wall of the limiting block 902 completely fits with the inner wall of the special-shaped hole, which can prevent the plug pin 703 from sliding in the special-shaped hole, and further prevent a gap from occurring between the contact surfaces of the variable cross-section steel 101 and the column 1. Thus, rapid positioning of the connection surface between the column 1 and the variable cross-section steel 101 can be achieved, and the column 1 and the variable cross-section steel 101 can be fastened.

[0031] The present invention can achieve the alignment of the variable cross-section steel 101 through two correction rods 206, preventing the variable cross-section steel 101 from being misaligned with the column 1 during hoisting. By applying a thrust to the inner wall of the variable cross-section steel 101 through two push shafts 205, the variable cross-section steel 101 can be elastically restored, preventing elastic deformation of the variable cross-section steel 101 during hoisting, which may cause the rear side of the variable cross-section steel 101 to be inclined and unable to fit tightly with the column 1. By quickly inserting the pin 703 into the special-shaped hole of the plug-in board 1101, the fastening of the column 1 and the variable cross-section steel 101 can be quickly completed without using bolts, greatly improving the work efficiency.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel structure column node structure with variable cross-section, including a column (1), and a variable cross-section steel (101) is arranged on one side of the column (1), characterized in that: It further includes a lifting mechanism, and the lifting mechanism includes a vertical track (201). The vertical track (201) is fixedly connected to one side of the column (1). A sliding frame (202) is slidably connected in the vertical track (201). A compression spring is arranged between the sliding frame (202) and the vertical track (201). First guide rails (203) are symmetrically and fixedly connected to the bottom of the sliding frame (202). An expansion rod (204) is slidably connected in the first guide rails (203). A push shaft (205) is fixedly connected through the outer wall of the expansion end of the expansion rod (204). The push shaft (205) is used in cooperation with the variable-section steel (101). Correction rods (206) are symmetrically hinged to both sides of the sliding frame (202). A torsion spring is arranged between the correction rod (206) and the sliding frame (202).

2. The variable cross-section steel structure column node structure according to claim 1, characterized in that: The lifting mechanism further includes a slider (301). The slider (301) is slidably connected in the sliding frame (202). A folding plate (302) is jointly hinged between the slider (301) and the sliding frame (202). A first tension spring is arranged between the slider (301) and the sliding frame (202). Vertical shafts (303) are symmetrically hinged to both sides of the folding plate (302). Slide rods (304) are symmetrically and slidably connected to both sides of the sliding frame (202). The vertical shafts (303) are slidably connected through the slide rods (304) in a penetrating manner. A connection block (305) is fixedly sleeved on the outer wall of the fixed end of the expansion rod (204). A horizontal shaft is fixedly connected to one side of the slide rod (304), and one end of the horizontal shaft is slidably connected through the connection block (305) in a penetrating manner.

3. The variable cross-section steel structure column node structure according to claim 2, characterized in that: The lifting mechanism further includes a second guide rail (401). The second guide rail (401) is fixedly connected to the first guide rail (203). One end of the push shaft (205) is snapped into the second guide rail (401) and slides therein.

4. The variable cross-section steel structure column node structure according to claim 2, characterized in that: It further includes a telescopic plate (501). The telescopic plate (501) is symmetrically hinged to the outer wall of the folding plate (302). The telescopic plate (501) is used in cooperation with the correction rod (206).

5. A variable cross-section steel structure column node structure according to claim 2, characterized in that: It further includes a limiting mechanism. The limiting mechanism includes a first elastic wedge-shaped block (601). A chute is opened on one side of the column (1). The first elastic wedge-shaped block (601) is slidably connected in the chute. A T-shaped groove is opened through one side of the sliding frame (202). The first elastic wedge-shaped block (601) is snapped into the T-shaped groove and slides therein. A slide rod (602) is slidably connected in the T-shaped groove. The slide rod (602) is used in cooperation with the slide rod (304) and the first elastic wedge-shaped block (601).

6. The variable cross-section steel structure column node structure according to claim 5, characterized in that: The limiting mechanism further includes a special-shaped rod (701). The special-shaped rod (701) is symmetrically and slidably connected to the inner wall of the column (1). A second tension spring is arranged between the special-shaped rod (701) and the inner wall of the column (1). A rectangular plate (702) is arranged on one side of the special-shaped rod (701). A plurality of uniformly distributed round holes are formed in a penetrating manner on one side of the rectangular plate (702). Plug pins (703) are movably connected in the plurality of round holes.

7. A variable cross-section steel structure column node structure according to claim 6, characterized in that: The limiting mechanism further includes a pressure rod (801). The pressure rods (801) are symmetrically fixed to both sides of the variable cross-section steel (101). The pressure rod (801) is used in cooperation with the special-shaped rod (701).

8. A variable cross-section steel structure column node structure according to claim 6, characterized in that: It further includes a limiting plate (901). The limiting plates (901) are symmetrically fixed to the inner wall of the column (1). A third tension spring is arranged between the rectangular plate (702) and the limiting plate (901). A limiting block (902) is fixedly connected to the outer wall of the plug pin (703) in a penetrating manner. A plurality of uniformly distributed first limiting holes are formed in a penetrating manner on one side of the limiting plate (901). Two groups of second limiting holes are formed in a penetrating manner on one side of both the column (1) and the variable cross-section steel (101). The plug pin (703) and the limiting block (902) are both inserted into the first limiting holes and the second limiting holes and slide therein.

9. A variable cross-section steel structure column node structure according to claim 8, characterized in that: It further includes a convex block (1001). The convex blocks (1001) are fixedly connected to the inner walls of the plurality of round holes of the rectangular plate (702). A spiral groove is formed in the outer wall of the plug pin (703). The convex block (1001) is inserted into the spiral groove and slides therein.

10. A variable cross-section steel structure column node structure according to claim 8, characterized in that: It further includes a plugging plate (1101). The plugging plates (1101) are symmetrically fixed to the inner wall of the variable cross-section steel (101). A plurality of uniformly distributed special-shaped holes are formed in a penetrating manner on one side of the plugging plate (1101). The plug pin (703) and the limiting block (902) are inserted into the special-shaped holes and slide therein. Second elastic wedge-shaped blocks (1102) are slidably connected in the plurality of special-shaped holes. A groove for cooperating with the second elastic wedge-shaped block (1102) is formed in the outer wall of the limiting block (902).

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