A variable cross-section steel column node structure

Abstract

The present invention relates to the field of construction engineering technology, and in particular to a variable-section steel column node structure. The technical problem to be solved by the present invention is that the variable-section steel in the prior art will produce elastic deformation during the hoisting process, resulting in the inability to connect the variable-section steel to the column, and the spiral connection steps are cumbersome. A variable-section steel column node structure, including a column, a variable-section steel is provided on one side of the column, and also includes a pulling mechanism, the pulling mechanism includes a vertical track, a vertical track is fixedly connected to one side of the column, and a sliding frame is slidably connected in the vertical track. The present invention designs the pulling mechanism, 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 can be elastically restored, and the correction rod squeezes the outer wall of the variable-section steel, so that the left and right sides of the variable-section steel can be aligned with the left and right sides of the column, thereby realizing rapid positioning of the connection surface between the variable-section steel and the column.

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-section steel structure is a special profile commonly found in steel structures and construction projects. Its cross-sectional dimensions vary along the length. By dynamically adjusting the cross-sectional dimensions along the length of the component, the cross-sectional dimensions are increased only in key stress areas to meet different stress requirements and save materials. It is suitable for scenarios such as large-span factories, workshops, and bridges.

[0003] Although the shapes of variable-section steel structures and uniform-section steel structures are different, they are both fastened together by bolts during installation. Compared with uniform-section steel structures, the variable-section steel structure as a beam has a very large span. When the variable-section steel structure is hoisted, it will produce a certain degree of elastic deformation, resulting in the inability to connect the variable-section steel structure with the column. In order to ensure the reliability of the connection between the variable-section steel structure and the column, more bolts are required for connection, which makes the work steps cumbersome and inefficient. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art that the variable-section steel will produce elastic deformation during the hoisting process, resulting in the variable-section steel being unable to be connected to the column and the cumbersome steps of spiral connection, the present invention provides a variable-section steel structure column node structure.

[0005] The technical solution is: a variable-section steel structure column node structure, including a column, a variable-section steel is provided on one side of the column, and also includes a lifting mechanism, the lifting mechanism includes a vertical track, one side of the column is fixedly connected to the vertical track, a sliding frame is slidably connected to the vertical track, a compression spring is provided between the sliding frame and the vertical track, a first guide rail is symmetrically fixed to the bottom of the sliding frame, a telescopic rod is slidably connected to the first guide rail, a push shaft is fixed to the outer wall of the telescopic end of the telescopic rod, the push shaft is used in conjunction with the variable-section steel, correction rods are symmetrically hinged on both sides of the sliding frame, and a torsion spring is provided between the correction rod and the sliding frame.

[0006] As a further preferred solution, the lifting mechanism also includes a slider, the slider is slidably connected in the sliding frame, a folding plate is hinged between the slider and the sliding frame, a first tension spring is arranged between the slider and the sliding frame, vertical axes are symmetrically hinged on both sides of the folding plate, sliding rods are symmetrically slidably connected on both sides of the sliding frame, the vertical axes are slidably connected to the sliding rods in a through-type manner, a connecting block is fixedly sleeved on the outer wall of the fixed end of the telescopic rod, a horizontal axis is fixedly connected to one side of the sliding rod, and one end of the horizontal axis is slidably connected to the connecting block in a through-type manner.

[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 inserted into the second guide rail and slides therein.

[0008] As a further preferred solution, a telescopic plate is also included. The outer wall of the folding plate is symmetrically hinged with the telescopic plate, and the telescopic plate is used in conjunction with the correction rod.

[0009] As a further preferred solution, it also includes a limiting mechanism, which includes a first elastic wedge block, a sliding groove is provided on one side of the column, and the first elastic wedge block is slidably connected in the sliding groove, and a T-shaped groove is provided on one side of the sliding frame. The first elastic wedge block is stuck in the T-shaped groove and slides therein, and a sliding rod is slidably connected in the T-shaped groove, and the sliding rod is used in conjunction with the sliding rod and the first elastic wedge block respectively.

[0010] As a further preferred solution, the limiting mechanism also includes a special-shaped rod, the inner wall of the column is symmetrically and slidingly connected to the special-shaped rod, a second tension spring is arranged between the special-shaped rod and the inner wall of the column, a rectangular plate is provided on one side of the special-shaped rod, and a plurality of evenly distributed circular holes are opened through one side of the rectangular plate, and pins are movably connected in the plurality of circular holes.

[0011] As a further preferred solution, the limiting mechanism further includes a pressure rod, and the pressure rods are symmetrically fixed to both sides of the variable section steel, and the pressure rods are used in conjunction with the special-shaped rods.

[0012] As a further preferred solution, it also includes a limiting plate, the inner wall of the column is symmetrically fixed with the limiting plate, a third tension spring is arranged between the rectangular plate and the limiting plate, the outer wall of the pin is fixed with a limiting block, one side of the limiting plate is penetrated by a plurality of evenly distributed first limiting holes, one side of the column and the variable section steel are penetrated by two groups of second limiting holes, the pin and the limiting block are both inserted into the first limiting hole and the second limiting hole and slide therein.

[0013] As a further preferred solution, it further includes a protrusion, and the inner walls of the several circular holes of the rectangular plate are fixed with the protrusion. The outer wall of the pin is provided with a spiral groove, and the protrusion is stuck in the spiral groove and slides therein.

[0014] As a further preferred solution, it also includes a plug-in plate, the inner wall of the variable section steel is symmetrically fixed with the plug-in plate, one side of the plug-in plate is penetrated by a plurality of evenly distributed special-shaped holes, the latch and the limit block are inserted into the special-shaped holes and slide therein, a second elastic wedge block is slidably connected to the plurality of special-shaped holes, and the outer wall of the limit block is provided with a groove for use with the second elastic wedge block.

[0015] The present invention has the following advantages:

[0016] 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, thereby restoring the elasticity of the variable section steel. In addition, by squeezing the outer wall of the variable section steel by 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, thereby realizing rapid positioning of the connecting surface between the variable section steel and the column.

[0017] 2. The present invention designs a limiting mechanism. When the third tension spring contracts, the limiting block fits against the inner walls of the first limiting hole and the second limiting hole, so that the pin and the limiting block cannot rotate. When the limiting block fits against the inner wall of the special-shaped hole, the protrusion squeezes the spiral groove of the pin, so that the limiting block can rotate in the special-shaped hole. The second elastic wedge block is clamped into the groove of the limiting block, so that the limiting block can be limited, thereby realizing rapid locking of the column and the variable section steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0019] Figure 2 Schematic diagram of the shape of the variable section steel before and after elastic deformation of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the lifting mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation at the vertical axis of the present invention;

[0022] Figure 5 This is a schematic diagram of the installation of the slide bar of the present invention;

[0023] Figure 6 This is a schematic diagram of the installation of the first guide rail of the present invention;

[0024] Figure 7 This is a schematic diagram of the installation of the telescopic plate of the present invention;

[0025] Figure 8 Schematic diagram of the structure of the limiting mechanism of the present invention;

[0026] Figure 9This is a schematic diagram of the installation of the special-shaped rod of the present invention;

[0027] Figure 10 This is a schematic diagram of the installation of the second elastic wedge block of the present invention;

[0028] Figure 11 This is a schematic diagram of the installation of the limit block of the present invention.

[0029] The reference numbers in the figure are: 1-column, 101-variable steel, 201-vertical track, 202-sliding frame, 203-first guide rail, 204-telescopic rod, 205-push shaft, 206-correction rod, 301-slider, 302-folding plate, 303-vertical axis, 304-sliding rod, 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-latch, 801-pressure rod, 901-limiting plate, 902-limiting block, 1001-bump, 1101-plug-in plate, 1102-second elastic wedge block. DETAILED DESCRIPTION

[0030] The following further describes the technical solution with reference to specific embodiments. It should be noted that terms such as "up," "down," "left," and "right" used herein to indicate directions refer only to the positions of the structures depicted in the corresponding drawings. Component numbers, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connected" and "coupled" in this application, unless otherwise specified, include both direct and indirect connections (couplings).

[0031] Example 1

[0032] A variable cross-section steel column node structure, such as Figure 1 and Figure 3-Figure 6 As shown, it includes a column 1, a variable section steel 101 is provided on the front side of the column 1, and a lifting mechanism. The lifting mechanism includes a vertical track 201, and 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, and a compression spring is provided between the sliding frame 202 and the vertical track 201. The bottom of the sliding frame 202 is symmetrically fixed with a first guide rail 203, and the first guide rail 203 is horizontally slidably connected with a telescopic rod 204. The outer wall of the telescopic end of the telescopic rod 204 is fixed with a push shaft 205, and the push shaft 205 is used in conjunction with the variable section steel 101. The push shaft 205 is used to apply a thrust to the top of the inner wall of the variable section steel 101 to make the variable section steel 101 elastically restore. Correction rods 206 are symmetrically hinged on both sides of the sliding frame 202, and a torsion spring is provided between the correction rod 206 and the sliding frame 202. After the correction rod 206 rotates, it contacts the variable section steel 101.

[0033] like Figure 4-Figure 6 As shown, the lifting mechanism also includes a slider 301, which is slidably connected to the sliding frame 202, and a folding plate 302 is hinged between the top of the slider 301 and the top of the sliding frame 202. A first tension spring is arranged between the slider 301 and the sliding frame 202, and vertical axes 303 are symmetrically hinged on both sides of the folding plate 302. The left and right sides of the sliding frame 202 are symmetrically and horizontally slidably connected with sliding rods 304. The vertical axes 303 are slidably connected to the sliding rods 304. When the folding plate 302 moves, the sliding rod 304 can be driven to move horizontally through the vertical axes 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, and a horizontal axis is fixed to one side of the sliding rod 304. One end of the horizontal axis is slidably connected to the connecting block 305. When the sliding rod 304 moves, the telescopic rod 204 can be driven to move through the horizontal axis and the connecting block 305.

[0034] like Figure 5 As shown, the lifting mechanism also includes a second guide rail 401, and the second guide rail 401 is fixed to the first guide rail 203. One end of the push shaft 205 is stuck in the second guide rail 401 and slides therein. When the push shaft 205 slides along the second guide rail 401, the telescopic end of the telescopic rod 204 can be retracted.

[0035] like Figure 7 As shown, it also includes a telescopic plate 501. The outer wall of the folding plate 302 is symmetrically hinged with the telescopic plate 501. The telescopic plate 501 is L-shaped. The telescopic end of the telescopic plate 501 is telescoped along the horizontal direction. The telescopic plate 501 is used in conjunction with the correction rod 206. When the fixed end of the telescopic plate 501 moves downward, the correction rod 206 can be rotated.

[0036] like Figure 8 As shown, it also includes a limiting mechanism, which includes a first elastic wedge block 601. A sliding groove is provided on the front side of the column 1, and the first elastic wedge block 601 is horizontally slidably connected in the sliding groove. A T-shaped groove is provided on the rear side of the sliding frame 202. The first elastic wedge block 601 is inserted into the T-shaped groove and slides therein. The first elastic wedge block 601 is used to limit the sliding frame 202. A sliding rod 602 is horizontally slidably connected in the T-shaped groove. The sliding rod 602 is used in conjunction with the sliding rod 304 and the first elastic wedge block 601 respectively, and there is friction between the sliding rod 602 and the sliding rod 304.

[0037] like Figure 8 and Figure 9As shown, the limiting mechanism also includes a special-shaped rod 701, and the inner wall of the column 1 is symmetrically and vertically slidably connected with the special-shaped rod 701. 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 the rear side of the special-shaped rod 701. The special-shaped rod 701 is used to limit the rectangular plate 702. Four evenly distributed circular holes are opened through one side of the rectangular plate 702, and pins 703 are movably connected in the four circular holes.

[0038] like Figure 8 As shown, the limiting mechanism also includes a pressure rod 801. The pressure rods 801 are symmetrically fixed on both sides of the variable section steel 101. The pressure rods 801 are used in conjunction with the special-shaped rod 701. When the pressure rods 801 contact and squeeze the special-shaped rod 701, the special-shaped rod 701 can slide downward.

[0039] like Figure 8 and Figure 9 As shown, it also includes a limiting plate 901. The limiting plate 901 is symmetrically fixed 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. The outer wall of the latch 703 is fixed with the limiting block 902 through-type. Four evenly distributed first limiting holes are penetrated through one side of the limiting plate 901. Two groups of second limiting holes are penetrated through one side of the column 1 and the variable section steel 101, each group has four. The first limiting hole and the second limiting hole have the same shape. The latch 703 and the limiting block 902 are both inserted into the first limiting hole and the second limiting hole and slide therein.

[0040] like Figure 9 As shown, it also includes a protrusion 1001. The top of the inner wall of the four circular holes of the rectangular plate 702 is fixed with a protrusion 1001. The outer wall of the latch 703 is provided with a spiral groove, and the protrusion 1001 is stuck in the spiral groove and slides therein.

[0041] like Figure 8 、 Figure 10 and Figure 11 As shown, it also includes a plug-in plate 1101, and the plug-in plate 1101 is symmetrically fixed to the left and right sides of the rear side of the inner wall of the variable section steel 101. Four evenly distributed special-shaped holes are opened through one side of the plug-in plate 1101. The latch 703 and the limit block 902 are inserted into the special-shaped holes and slide therein. A second elastic wedge block 1102 is vertically connected to the special-shaped hole for sliding. The outer wall of the limit block 902 is provided with a groove for use with the second elastic wedge block 1102.

[0042] Initially, the first tension spring is in a contracted state, and there is a large gap between the two push shafts 205. The first elastic wedge block 601 is stuck in the T-slot 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-slot. The sliding frame 202 is restricted and cannot move. The third tension spring between the rectangular plate 702 and the limit plate 901 is in an extended state. The front end of the latch 703 is in the same vertical plane as the front side of the column 1. First, the variable section steel 101 is hoisted to the upper side of the column 1 by the hoisting equipment in the prior art. 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 tilted. It is necessary to first elastically adjust the variable section steel 101 After the folding plate 302 is in contact with the folding plate 302, the folding plate 302 is expanded downward with its own hinge point as the center of the circle under the influence of the weight of the folding plate 301, 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 end of the telescopic plate 501 extends and drives its fixed end to move downward, so that the fixed end of the telescopic plate 501 squeezes the outer wall of the correction rod 206. The correction rod 206 is forced to rotate upward with the connection point of the sliding frame 202 as the center of the circle, and the torsion spring is forced to contract, with the correction rod 206 on the left as the center. For example, when the position of the variable section steel 101 is biased towards the left correction rod 206, the left correction rod 206 rotates and fits and squeezes the left side of the variable section steel 101, causing the variable section steel 101 to move to the right until the variable section steel 101 contacts the right correction rod 206. Then, the two correction rods 206 are rotated to a vertical state and fit with the left and right sides of the variable section steel 101 respectively, 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 extended by the force, and 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 axis, and 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 transverse axis of the slide rod 304 close to the side of the slide rod 304. At the same time, the telescopic end of the telescopic rod 204 drives the push shaft 205 to move obliquely to the rear side. The push shaft 205 slides along the corresponding second guide rail 401 and drives the telescopic end of the telescopic rod 204 to retract. Then, the ends of the two push shafts 205 that are close to each other 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 applies an upward thrust to the top of the inner wall of the variable section steel 101, causing the variable section steel 101 to begin to recover elastically until the push shaft 205 moves to the top corner of the inner wall of the variable section steel 101, thereby increasing the pulling force of the push shaft 205 on the variable section steel 101 to the rear side.The variable section steel 101 continues to recover elastically under the force, and then the sliding rod 304 contacts the end of the sliding rod 602, and drives the sliding rod 602 to slide backward along the T-shaped slot of the sliding frame 202 through friction with the sliding rod 602, and the sliding rod 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 push shaft 205 slides to the lower end of the second guide rail 401. The variable section steel 101 completes elastic recovery under the action of the push shaft 205, so that the rear side surface of the variable section steel 101 is in a vertical state, which is convenient for the subsequent connection between the variable section steel 101 and the column 1, and the top surface of the first elastic wedge block 601 is no longer in contact with the T-shaped slot The top surface of the inner wall of the rectangular plate 702 is in contact, so that the sliding frame 202 can move. The weight of the variable-section steel 101 is applied to the sliding frame 202 through the folding plate 302. The sliding frame 202 is forced to slide downward along the vertical track 201, and the compression spring is forced to shrink. Then the bottom of the pressure rod 801 contacts and squeezes the top of the corresponding special-shaped rod 701, and the special-shaped rod 701 is forced to slide downward. The second tension spring is forced to extend. Then the special-shaped rod 701 is no longer in contact with the front side of the rectangular plate 702. The rectangular plate 702 is able to move after being freed from the restriction. The contraction of the third tension spring drives the rectangular plate 702 to move forward, so that the protrusion 1001 squeezes the inner wall of the spiral groove of the adjacent latch 703. It is worth noting that due to the limit After the first limit hole 703 is in the locking position, the locking pin 703 and the locking block 902 are in the locking position, and the locking pin 703 and the locking block 902 are in the locking position. The wedge-shaped surface of the adjacent second elastic wedge block 1102 contacts and squeezes, and the second elastic wedge block 1102 contracts and slides under the force until the second elastic wedge block 1102 is aligned with the groove of the limit block 902. The second elastic wedge block 1102 is released and slides and is stuck in the groove, thereby limiting the limit block 902 and preventing the latch 703 from rotating. At this time, the outer wall of the limit block 902 is completely in contact with the inner wall of the special-shaped hole, thereby preventing the latch 703 from sliding in the special-shaped hole, and further preventing a gap from being generated between the contact surface of the variable section steel 101 and the column 1. This can achieve rapid positioning of the connection surface between the column 1 and the variable section steel 101, and fasten the column 1 and the variable section steel 101.

[0043] The present invention can realize the correction of the variable section steel 101 through the two correction rods 206, and prevent the variable section steel 101 from being misaligned with the column 1 when being hoisted. The two push shafts 205 apply a thrust to the inner wall of the variable section steel 101, which can make the variable section steel 101 elastically recover, and prevent the variable section steel 101 from generating elastic deformation during the hoisting process, causing the rear side of the variable section steel 101 to be tilted and unable to fit tightly with the column 1. By quickly inserting the pin 703 into the special-shaped hole of the plug-in plate 1101, the column 1 and the variable section steel 101 can be quickly fastened without the need for bolt fastening, thereby greatly improving work efficiency.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A variable-section steel column node structure, comprising a column (1), wherein one side of the column (1) is provided with a variable-section steel (101), characterized in that: The utility model further comprises a lifting mechanism, wherein the lifting mechanism comprises a vertical track (201), one side of the column (1) is fixedly connected to the vertical track (201), a sliding frame (202) is slidably connected in the vertical track (201), a compression spring is provided between the sliding frame (202) and the vertical track (201), a first guide rail (203) is symmetrically fixed to the bottom of the sliding frame (202), a telescopic rod (204) is slidably connected in the first guide rail (203), a push shaft (205) is fixedly connected to the outer wall of the telescopic end of the telescopic rod (204), the push shaft (205) is used in conjunction with the variable section steel (101), and correction rods (206) are symmetrically hinged on both sides of the sliding frame (202), and a torsion spring is provided between the correction rod (206) and the sliding frame (202).

2. The variable cross-section steel column node structure according to claim 1, characterized in that: The lifting mechanism also includes a slider (301), the slider (301) is slidably connected to the sliding frame (202), a folding plate (302) is hinged between the slider (301) and the sliding frame (202), a first tension spring is provided between the slider (301) and the sliding frame (202), vertical axes (303) are symmetrically hinged on both sides of the folding plate (302), and sliding rods (304) are symmetrically slidably connected on both sides of the sliding frame (202), the vertical axes (303) are slidably connected to the sliding rods (304) in a through-type manner, and a connecting block (305) is fixedly provided on the outer wall of the fixed end of the telescopic rod (204), a horizontal axis is fixedly connected to one side of the sliding rod (304), and one end of the horizontal axis is slidably connected to the connecting block (305) in a through-type manner.

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

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

5. The variable cross-section steel column node structure according to claim 2, characterized in that: The invention also includes a limiting mechanism, wherein the limiting mechanism includes a first elastic wedge block (601), a sliding groove is provided on one side of the column (1), and the first elastic wedge block (601) is slidably connected in the sliding groove, and a T-shaped groove is provided on one side of the sliding frame (202), and the first elastic wedge block (601) is inserted into the T-shaped groove and slides therein, and a sliding rod (602) is slidably connected in the T-shaped groove, and the sliding rod (602) is used in conjunction with the sliding rod (304) and the first elastic wedge block (601) respectively.

6. The variable cross-section steel column node structure according to claim 5, characterized in that: The limiting mechanism further comprises a special-shaped rod (701), the inner wall of the column (1) is symmetrically slidably connected to the special-shaped rod (701), a second tension spring is provided between the special-shaped rod (701) and the inner wall of the column (1), a rectangular plate (702) is provided on one side of the special-shaped rod (701), and a plurality of evenly distributed circular holes are penetrated through one side of the rectangular plate (702), and latches (703) are movably connected in the plurality of circular holes.

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

8. The variable cross-section steel column node structure according to claim 6, characterized in that: The invention also includes a limiting plate (901), the inner wall of the column (1) is symmetrically fixed with the limiting plate (901), a third tension spring is provided between the rectangular plate (702) and the limiting plate (901), the outer wall of the latch (703) is fixedly connected with the limiting block (902), a plurality of evenly distributed first limiting holes are provided through one side of the limiting plate (901), two groups of second limiting holes are provided through one side of the column (1) and the variable section steel (101), and the latch (703) and the limiting block (902) are both inserted into the first limiting hole and the second limiting hole and slide therein.

9. The variable cross-section steel column node structure according to claim 8, characterized in that: It also includes a protrusion (1001), and the inner walls of the plurality of circular holes of the rectangular plate (702) are all fixedly connected with the protrusion (1001). The outer wall of the latch (703) is provided with a spiral groove, and the protrusion (1001) is inserted into the spiral groove and slides therein.

10. The variable cross-section steel column node structure according to claim 8, characterized in that: The invention also includes a plug-in plate (1101), the inner wall of the variable section steel (101) is symmetrically fixed with the plug-in plate (1101), one side of the plug-in plate (1101) is provided with a plurality of evenly distributed special-shaped holes, the latch (703) and the limit block (902) are inserted into the special-shaped holes and slide therein, a second elastic wedge block (1102) is slidably connected in the plurality of special-shaped holes, and the outer wall of the limit block (902) is provided with a groove for use with the second elastic wedge block (1102).

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