Novel assembled steel column-column splicing joint with self-locking capability

Abstract

The application discloses a new type of assembled steel structure column-column splicing joint with self-locking capability, an upper column assembly, a lower column assembly, a new type of self-locking pin shaft and a joint shell; the upper column assembly comprises a steel column, an end plate and a taper head; the lower column assembly comprises a steel column, an end plate and a column end sleeve; the taper head and the column end sleeve are both provided with a pin shaft reserved hole at corresponding positions; the taper head is inserted into the column end sleeve; the new type of self-locking pin shaft is inserted into the corresponding pin shaft reserved hole to realize self-locking; and the joint shell is sleeved at the connecting position of the taper head and the column end sleeve. The application adopts the assembled structure, all components are easy to process and install, the installation difficulty is small, the cross section form is not changed, subsequent decoration is facilitated, and the practicability is good.

Description

Technical Field

[0001] This invention relates to the field of structural engineering technology, specifically a novel prefabricated steel structure column-column splicing node with self-locking capability. Background Technology

[0002] Steel structure buildings will develop rapidly, but the main technical challenges of prefabricated steel structure buildings are concentrated in the joint area. For the column-to-column connection of steel structures, the current main methods are on-site welding or bolting. If a bolted connection system is used, a node plate needs to be installed in the column joint area. If welding is used, the on-site weld is prone to corrosion, affecting the strength. Moreover, both methods have low construction efficiency and high construction costs. Furthermore, due to the lack of a self-locking mechanism, the corresponding positions may shift under external disturbances on site, affecting installation and subsequent service strength, as well as the appearance and inconvenience for subsequent decoration and other secondary work. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a novel prefabricated steel structure column-column splicing node with self-locking capability. This invention employs a novel connection method that enables self-locking between columns during installation. The pin installation is very simple, and the self-locking mechanism eliminates the influence of external force disturbances during installation and significantly improves the node strength during later use. The structure is easy to install, greatly improving on-site construction efficiency and reducing construction difficulty, thereby increasing efficiency and reducing costs.

[0004] This invention is achieved through the following technical solution:

[0005] A novel prefabricated steel structure column-column splicing node with self-locking capability includes an upper column assembly, a lower column assembly, a novel self-locking pin, and a node shell. The upper column assembly includes a steel column, an end plate, and a cone head; the lower column assembly includes a steel column, an end plate, and a column end sleeve. Both the cone head and the column end sleeve have pre-drilled holes for the self-locking pin at corresponding positions. The upper and lower column assemblies are welded together in the factory. The cone head of the upper column assembly is inserted into the column end sleeve of the lower column assembly, and the upper and lower column assemblies achieve self-locking through the tapered contact surface of the cone head and the column end sleeve. The sleeve wall thickness is increased; a first limiting shaft pre-drilled hole is provided on the inner wall near the bottom of the pin pre-drilled hole on the cone head; a new type of self-locking pin is inserted into the corresponding pin pre-drilled holes of the cone head and the column end sleeve. The new type of self-locking pin is equipped with a limiting shaft with elastic function. When the new type of self-locking pin is not locked, the limiting shaft on it will not pop out; when the new type of self-locking pin is locked, the limiting shaft on it pops out and is locked in the first limiting shaft pre-drilled hole on the cone head to achieve self-locking; the node shell is fitted at the connection between the cone head and the column end sleeve.

[0006] Furthermore, the novel self-locking pin includes a load-bearing section and a self-locking section. The load-bearing section is a solid round rod, and the self-locking section includes a circular groove, a pin sleeve, a spring, a slider, and a limiting shaft. The circular groove is fixed to the end of the solid round rod, and the pin sleeve is fitted onto the outside of the circular groove. Three pre-drilled holes for the second limiting shaft are respectively provided on the circular groove and the pin sleeve. When the circular groove and the pin sleeve rotate relative to each other to a certain position, the three pre-drilled holes for the second limiting shaft can overlap. A platform is provided on the inner wall of the circular groove, and one end of the spring is connected to the platform. The slider is a solid isosceles trapezoidal prism, and the slider is set inside the circular groove. The lower base of the slider is connected to the other end of the spring. Three... All the limiting shafts are located in the circular groove. When in the unlocked state, the outer ends of the three limiting shafts pass through the three second limiting shaft pre-drilled holes on the circular groove and are abutted against the inner wall of the pin sleeve. The inner ends of the three limiting shafts abut against the top bottom and two waist positions of the slider, and the spring is compressed. When in the locked state, the circular groove and the pin sleeve rotate relative to each other until the three second limiting shaft pre-drilled holes on them coincide. The outer ends of the three limiting shafts pass through the coincident second limiting shaft pre-drilled holes on the circular groove and the pin sleeve, and the inner ends of the three limiting shafts abut against the top bottom and two waist positions of the slider.

[0007] Furthermore, the cone head of the upper column assembly and the column end sleeve of the lower column assembly have the same small cone angle, and their contact surfaces are roughened. The distance from the center of the pre-drilled hole on the cone head to the end plate is equal to the distance from the center of the pre-drilled hole on the column end sleeve to the cylinder opening, and the radius of the pre-drilled hole on the cone head is the same as the radius of the pre-drilled hole on the column end sleeve.

[0008] Furthermore, the cone head of the upper column assembly is a solid component, and the distance between the first limiting shaft reserved hole in the pin reserved hole on the cone head and the bottom of the pin reserved hole is equal to the distance between the second limiting shaft reserved hole on the circular groove and the groove opening and the cylinder opening.

[0009] Furthermore, the length of the load-bearing section of the new self-locking pin is greater than twice the wall thickness of the column end sleeve of the lower column assembly, and the diameter of the cross-section circle of the load-bearing section is greater than the outer diameter of the circular groove of the self-locking section; the outer diameter of the pin sleeve is the same as the diameter of the cross-section circle of the load-bearing section, the inner diameter of the pin sleeve is the same as the outer diameter of the circular groove, the height of the pin sleeve is the same as the height of the circular groove, and the opening radius of the second limiting shaft reserved hole on the pin sleeve is greater than the opening radius of the second limiting shaft reserved hole on the circular groove;

[0010] The upper bottom length of the slider is the same as the diameter of the limiting shaft, the thickness of the slider is more than twice the diameter of the limiting shaft, the lower bottom length of the slider is less than the chord length of the circle corresponding to its installation position, and the height of the slider is less than the depth of the circular groove.

[0011] Of the three limiting shafts, the inner ends of two of them are inclined surfaces, and the angle of the inclined surfaces is the same as the angle of the waist of the slider.

[0012] Furthermore, the node shell includes a left half shell and a right half shell that are mated together, and the mating points on both sides of the left half shell and the right half shell are connected and fixed by locking devices.

[0013] Furthermore, the locking mechanism includes a left plate and a right plate that are mated together. The left plate has a left arc-shaped slide rail, the opening of which is located above the mating edge of the left plate. A left locking tongue is connected to the left plate, consisting of a slide rod and a stop rod, arranged in an L-shape. The corner of the left locking tongue is hinged to the left plate via a hinge shaft, the hinge point being located below the mating edge of the left plate. When the left locking tongue rotates around the hinge shaft, the movement trajectory of the slide rod end coincides with the trajectory of the left arc-shaped slide rail. A bolt hole is provided at the end of the slide rod, and a connecting thread is provided inside the left arc-shaped slide rail. The right plate has... The right circular arc slide has its opening located below the mating edge of the right plate. A right locking tongue is connected to the right plate, consisting of a slide rod and a stop rod, arranged in an L-shape. The corner of the right locking tongue is hinged to the right plate via a hinge shaft, with the hinge point located above the mating edge of the right plate. When the right locking tongue rotates around the hinge shaft, the movement trajectory of the slide rod end coincides with the trajectory of the right circular arc slide. A bolt hole is provided at the end of the slide rod, and a connecting thread is provided inside the right circular arc slide. The left circular arc slide and left locking tongue on the left plate are centrally symmetrically arranged with the right circular arc slide and right locking tongue on the right plate.

[0014] In this invention, the upper column assembly, lower column assembly, node shell, and novel self-locking pin are welded and assembled in the factory. The column ends of both the upper and lower column assemblies can have any cross-section, and the end plate form is selected according to the actual project. The column ends and end plates, and the end plates and conical heads or column end sleeves are welded in the factory. On-site, the upper column assembly is hoisted and inserted into the lower column assembly, paying attention to aligning the pin's pre-drilled holes. The novel self-locking pin is pushed inward into the aligned pin's pre-drilled holes, and the novel self-locking pin is rotated until a spring pops out, indicating that the novel self-locking pin installation is complete. The novel self-locking pin installation steps are repeated to complete the installation of each novel self-locking pin. Finally, the node shell is fitted on to complete the node shell installation.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] (1) The present invention achieves self-locking between columns by using the special contact form between the upper column assembly and the lower column assembly to resist torque with axial pressure, thereby improving the structural bearing capacity.

[0017] (2) This invention proposes a new type of self-locking pin to replace bolted connection components, eliminating the need for node plates in the node area and simplifying the construction difficulty.

[0018] (3) All components in this invention can be manufactured in the factory and assembled on site. The assembly process is very simple, which can effectively simplify the construction process, improve on-site construction efficiency, and save construction time.

[0019] (4) The main load-bearing parts of the important components in this invention are solid steel columns or have been thickened. Under actual stress conditions, their compressive, tensile and torsional resistance meets the design requirements, and their stress performance is good. The joints are safe and reliable.

[0020] (5) In this invention, the appearance of the column is not changed by setting the node shell, which facilitates subsequent decoration and other secondary construction. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the node of the present invention;

[0022] Figure 2 This is a three-dimensional schematic diagram of the node of the present invention with the node shell removed;

[0023] Figure 3 An exploded view of the node of the present invention with its shell removed;

[0024] Figure 4 This is a three-dimensional schematic diagram of the upper column component in the node of the present invention;

[0025] Figure 5 This is a detailed cross-sectional view of the reserved hole for the upper pin shaft and the reserved hole for the first limiting shaft in the node of the present invention;

[0026] Figure 6 This is a three-dimensional schematic diagram of the lower column assembly in this invention;

[0027] Figure 7 This is a cross-sectional schematic diagram of the lower column assembly in this invention;

[0028] Figure 8 This is a three-dimensional schematic diagram of the installation stage of the novel self-locking pin in this invention;

[0029] Figure 9 This is a three-dimensional schematic diagram of the working stage of the novel self-locking pin in this invention;

[0030] Figure 10 This is an exploded view of the novel self-locking pin in this invention;

[0031] Figure 11 This is an exploded view of the node shell in this invention;

[0032] Figure 12 This is a schematic diagram of the locking structure of the node shell in this invention;

[0033] Figure 13 This is a schematic diagram of the structure of the locking plate and the locking tongue in this invention;

[0034] In the diagram: 1-Upper column assembly, 2-Lower column assembly, 3-New type self-locking pin; 4-Steel column, 5-End plate, 6-Conical head, 7-Column end sleeve, 8-Pin reserved hole, 9-First limit shaft reserved hole, 10-Solid round rod, 11-Round groove, 12-Pin sleeve, 13-Spring, 14-Slider, 15-Second limit shaft reserved hole, 16-Limit shaft, 17-Node shell, 18-Left half shell, 19-Right half shell, 20-Locking component, 21-Left plate, 22-Right plate, 23-Left arc slide, 24-Left locking tongue, 25-Slide rod, 26-Stop bar, 27-Hinge shaft, 28-Bolt hole, 29-Right arc slide, 30-Right locking tongue. Detailed Implementation

[0035] The present invention will be further illustrated by the following embodiments, but is not limited to the following embodiments.

[0036] To illustrate the present invention more clearly, it will be further described below with reference to the accompanying drawings. Those skilled in the art should understand that the following detailed description is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0037] In the description of this embodiment, it should be understood that the terms "left," "right," etc., indicate the orientation or positional relationship based on the appendix. Figure 11 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0038] like Figures 1 to 7As shown, a novel prefabricated steel structure column-column splicing node with self-locking capability includes an upper column assembly 1, a lower column assembly 2, a novel self-locking pin 3, and a node shell 17. The upper column assembly 1 includes a steel column 4, an end plate 5, and a cone head 6; the lower column assembly 2 includes a steel column 4, an end plate 5, and a column end sleeve 7. Both the cone head 6 and the column end sleeve 7 have pre-drilled holes 8 at corresponding positions for the pin. The upper column assembly 1 and the lower column assembly 2 are welded together in the factory. The cone head 6 of the upper column assembly 1 is inserted into the column end sleeve 7 of the lower column assembly 2, and the upper column assembly 1 and the lower column assembly 2 achieve self-locking through the tapered contact surface of the cone head 6 and the column end sleeve 7. The wall thickness of the column end sleeve 7 is increased; a first limiting shaft reserved hole 9 is opened on the inner wall of the pin reserved hole 8 near the bottom of the hole on the cone head 6; the new self-locking pin 3 is inserted into the corresponding pin reserved hole 8 of the cone head 6 and the column end sleeve 7. The new self-locking pin 3 is provided with a limiting shaft 16 with elastic function. When the new self-locking pin 3 is not locked, the limiting shaft 16 on it will not pop out; when the new self-locking pin 3 is locked, the limiting shaft 16 on it pops out and is locked in the first limiting shaft reserved hole 9 on the cone head 6 to achieve self-locking; the node shell 17 is fitted at the connection between the cone head 6 and the column end sleeve 7.

[0039] The following provides a further description of the important components in this invention:

[0040] 1) such as Figures 8 to 10 As shown, the novel self-locking pin 3 includes a load-bearing section and a self-locking section. The load-bearing section is a solid round rod 10. The self-locking section includes a circular groove 11, a pin sleeve 12, a spring 13, a slider 14, and a limiting shaft 16. The circular groove 11 is fixed to the end of the solid round rod 10. The pin sleeve 12 is fitted onto the outside of the circular groove 11. Three second limiting shaft pre-drilled holes 15 are respectively opened on the circular groove 11 and the pin sleeve 12. When the circular groove 11 and the pin sleeve 12 rotate relative to each other to a certain position, the three second limiting shaft pre-drilled holes 15 on them can overlap respectively. A platform is provided on the inner wall of the circular groove 11, and one end of the spring 13 is connected to the platform. The slider 14 is a solid isosceles trapezoidal prism. The slider 14 is set inside the circular groove 11, and the lower bottom of the slider 14 is connected to the other end of the spring 13. The limiting shaft 16 Three limiting shafts 16 are provided, all located within the circular groove 11. When in the unlocked state, the outer ends of the three limiting shafts 16 pass through the three second limiting shaft pre-drilled holes 15 on the circular groove 11 and rest against the inner wall of the pin sleeve 12. The inner ends of the three limiting shafts 16 rest against the upper bottom and two waist positions of the slider 14, respectively. At this time, the spring 13 is compressed. When in the locked state, the circular groove 11 and the pin sleeve 12 rotate relative to each other until the three second limiting shaft pre-drilled holes 15 on both coincide. The outer ends of the three limiting shafts 16 pass through the coincident second limiting shaft pre-drilled holes 15 on the circular groove 11 and the pin sleeve 12, respectively. The inner ends of the three limiting shafts 16 rest against the upper bottom and two waist positions of the slider 14, respectively.

[0041] like Figure 8 As shown, during the installation phase, the spring 13 of the aforementioned novel self-locking pin 3 is in a compressed state, and the slider 14 is located in the upper part of the circular groove 11. During installation, the second limiting shaft reserved hole 15 on the circular groove 11 and the second limiting shaft reserved hole 15 on the pin sleeve 12 are located on the same plane but are not aligned or overlapped. The inner end of the limiting shaft 16 is connected to the slider 14, and the outer end passes through the second limiting shaft reserved hole 15 on the circular groove 11 and then connects to the inner wall of the pin sleeve 12. The contact surface between the limiting shaft 16 and the inclined surface of the slider 14 is lubricated. Figure 9 As shown, when the new self-locking pin 3 is installed, the circular groove 11 and the pin sleeve 12 slide relative to each other, and the second limiting shaft reserved hole 15 on both are aligned and overlapped. The spring 13 pushes the slider 14 to move downward, and the two waist slopes on both sides of the slider 14 push the two limiting shafts 16 to move outward. The upper bottom of the slider 14 pushes the third limiting shaft 16 to move downward. The outer ends of the three limiting shafts 16 are completely ejected from the pin sleeve 12 and locked in the corresponding first limiting shaft reserved hole 9 on the cone head 6, entering the working state and realizing the connection of the upper column assembly 1 and the lower column assembly 2.

[0042] 2) The cone head 6 of the upper column assembly 1 and the column end sleeve 7 of the lower column assembly 2 have the same small cone angle. The contact surfaces of the two are roughened. The distance from the center of the pin pre-reserved hole 8 on the cone head 6 to the end plate 5 is equal to the distance from the center of the pre-reserved hole on the column end sleeve 7 to the cylinder opening. The radius of the pre-reserved hole on the cone head 6 is the same as the radius of the pre-reserved hole on the column end sleeve 7.

[0043] 3) The cone head 6 of the upper column assembly 1 is a solid component. The distance between the first limiting shaft reserved hole 9 in the pin reserved hole 8 on the cone head 6 and the bottom of the pin reserved hole 8 is equal to the distance between the second limiting shaft reserved hole 15 on the circular groove 11 and the groove opening and the cylinder opening.

[0044] 4) The length of the bearing section of the new self-locking pin 3 is greater than twice the wall thickness of the column end sleeve 7 of the lower column assembly 2, and the diameter of the bearing section cross-section circle is greater than the outer diameter of the self-locking section groove 11; the outer diameter of the pin sleeve 12 is the same as the diameter of the bearing section cross-section circle, the inner diameter of the pin sleeve 12 is the same as the outer diameter of the groove 11, the height of the pin sleeve 12 is the same as the height of the groove 11, the opening radius of the second limiting shaft reserved hole 15 on the pin sleeve 12 is greater than the opening radius of the second limiting shaft reserved hole 15 on the groove 11; the upper bottom length of the slider 14 is the same as the diameter of the limiting shaft, the thickness of the slider 14 is greater than twice the diameter of the limiting shaft, the lower bottom length of the slider 14 is less than the chord length of the circle corresponding to its installation position, and the height of the slider 14 is less than the depth of the groove 11; among the three limiting shafts 16, the inner ends of two of the limiting shafts 16 are inclined surfaces, and the angle of the inclined surface is the same as the angle of the waist of the slider 14.

[0045] 5) such as Figure 11As shown, the node shell 17 includes a left half shell 18 and a right half shell 19 that are mated together. The mating points on both sides of the left half shell 18 and the right half shell 19 are connected and fixed by locking members 20.

[0046] like Figure 12 and Figure 13 As shown, the locking component 20 includes a left plate 21 and a right plate 22 that are mated together. A left arc-shaped slide rail 23 is provided on the left plate 21, with its opening located above the mating edge of the left plate 21. A left locking tongue 24 is connected to the left plate 21. The left locking tongue 24 consists of a slide rod 25 and a stop rod 26, arranged in an L-shape. The corner of the left locking tongue 24 is hinged to the left plate 21 via a hinge shaft 27, with the hinge point located below the mating edge of the left plate 21. When the left locking tongue 24 rotates around the hinge shaft 27, the movement trajectory of the end of the slide rod 25 coincides with the trajectory of the left arc-shaped slide rail 23. A bolt hole 28 is provided at the end of the slide rod 25, and a connecting thread is provided inside the left arc-shaped slide rail 23. A right arc-shaped slide rail 22 is provided on the right plate 22. The right circular arc slide 29 has its opening end located below the mating edge of the right plate 22. A right locking tongue 30 is connected to the right plate 22. The right locking tongue 30 consists of a slide rod 25 and a stop rod 26, arranged in an L-shape. The corner of the right locking tongue 30 is hinged to the right plate 22 via a hinge shaft 27. The hinge point is located above the mating edge of the right plate 22. When the right locking tongue 30 rotates around the hinge shaft 27, the movement trajectory of the end of the slide rod 25 coincides with the trajectory of the right circular arc slide 29. A bolt hole 28 is provided at the end of the slide rod 25, and a connecting thread is provided inside the right circular arc slide 29. The left circular arc slide 23 and the left locking tongue 24 on the left plate 21 are centrally symmetrically arranged with the right circular arc slide 29 and the right locking tongue 30 on the right plate 22.

[0047] The installation method of the node of this invention includes the following steps:

[0048] 1) Hoist the upper column assembly 1 and insert it into the lower column assembly 2. During the process, pay attention to aligning the pin holes 8 of the two components.

[0049] 2) Push the new self-locking pin 3 into the pin pre-drilled hole 8. During the process, make sure that the first limiting shaft pre-drilled hole 9 of the upper column assembly 1 and the second limiting shaft pre-drilled hole 15 on the pin sleeve 12 of the new pin are aligned. Rotate the bearing section of the new self-locking pin 3. When you hear the spring 13 pop out, the installation is complete.

[0050] 3) Repeat step 2 to complete the installation of all the new self-locking pins 3;

[0051] 4) Install node shell 17, align the left half shell 18 and the right half shell 19 so that they fit over the outside of the connection between the cone head 6 and the column end sleeve 7. First, connect and fix the locking piece 20 on one side. Rotate the left locking tongue 24 on the left plate 21 and the right locking tongue 30 on the right plate until the stop bars 26 of the left locking tongue 24 and the right locking tongue 30 are engaged together. Screw the connecting bolts into the bolt holes 28 of the slide rods 25 of the left locking tongue 24 and the right locking tongue 30 respectively. The connecting bolts connect and fix the slide rods 25 to the slide rail, thus completing the locking of one side of the locking piece 20. Lock the other side of the locking piece 20 in the same way to complete the installation.

[0052] The examples described above are merely illustrative of the invention and are not intended to limit the implementation of the invention, nor should any of the accompanying drawings be construed as limiting the scope of the claims. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. Any structural form similar to this technical solution, designed without departing from the spirit of the invention, should be protected by this invention.

Claims

1. A novel prefabricated steel structure column-column splicing joint with self-locking capability, characterized in that: The system includes an upper column assembly, a lower column assembly, a novel self-locking pin, and a node housing. The upper column assembly includes a steel column, an end plate, and a cone head; the lower column assembly includes a steel column, an end plate, and a column end sleeve. Both the cone head and the column end sleeve have pre-drilled holes for the pin at corresponding positions. The upper and lower column assemblies are welded together in the factory. The cone head of the upper column assembly is inserted into the column end sleeve of the lower column assembly, and the upper and lower column assemblies achieve self-locking through the tapered contact surfaces of the cone head and the column end sleeve. A first limiting shaft pre-drilled hole is provided on the inner wall near the bottom of the pin pre-drilled hole on the cone head. The novel self-locking pin is inserted into the corresponding pin pre-drilled holes on the cone head and the column end sleeve. The novel self-locking pin is equipped with a limiting shaft with elastic function. When the novel self-locking pin is not locked, the limiting shaft does not pop out; when the novel self-locking pin is locked, the limiting shaft pops out and locks into the first limiting shaft pre-drilled hole on the cone head to achieve self-locking. The node housing is fitted onto the connection between the cone head and the column end sleeve. The novel self-locking pin includes a load-bearing section and a self-locking section. The load-bearing section is a solid round rod, and the self-locking section includes a circular groove, a pin sleeve, a spring, a slider, and limiting shafts. The circular groove is fixed to the end of the solid round rod, and the pin sleeve is fitted onto the outside of the circular groove. Three pre-drilled holes for the second limiting shaft are respectively provided on the circular groove and the pin sleeve. When the circular groove and the pin sleeve rotate relative to each other to a certain position, the three pre-drilled holes for the second limiting shaft can overlap. A platform is provided on the inner wall of the circular groove, and one end of the spring is connected to the platform. The slider is a solid isosceles trapezoidal prism, and the slider is set inside the circular groove. The lower base of the slider is connected to the other end of the spring. Three limiting shafts are provided. All shafts are located within the circular groove. When in the unlocked state, the outer ends of the three limiting shafts pass through the three pre-drilled holes for the second limiting shaft on the circular groove and rest against the inner wall of the pin sleeve. The inner ends of the three limiting shafts rest against the top bottom and two sides of the slider, respectively, and the spring is compressed. When in the locked state, the circular groove and the pin sleeve rotate relative to each other until the three pre-drilled holes for the second limiting shaft on both coincide. The outer ends of the three limiting shafts pass through the coincided pre-drilled holes for the second limiting shaft on the circular groove and the pin sleeve, respectively, and the inner ends of the three limiting shafts rest against the top bottom and two sides of the slider, respectively.

2. The new self-locked assembled steel column-column spliced joint according to claim 1, characterized in that: The cone head of the upper column assembly and the column end sleeve of the lower column assembly have the same small cone angle. The contact surfaces of the two are roughened. The distance from the center of the pre-drilled hole on the cone head to the end plate is equal to the distance from the center of the pre-drilled hole on the column end sleeve to the cylinder opening. The radius of the pre-drilled hole on the cone head is the same as the radius of the pre-drilled hole on the column end sleeve.

3. The new type of assembled steel column-column spliced joint with self-locking capability according to claim 1, characterized in that: The cone head of the upper column assembly is a solid component. The distance between the first limiting shaft reserved hole in the pin reserved hole on the cone head and the bottom of the pin reserved hole is equal to the distance between the second limiting shaft reserved hole on the circular groove and the groove opening and the cylinder opening.

4. The new type of assembled steel column-column spliced joint with self-locking capability according to claim 3, characterized in that: The length of the bearing section of the new self-locking pin is greater than twice the wall thickness of the column end sleeve of the lower column assembly, and the diameter of the bearing section cross-section circle is greater than the outer diameter of the self-locking section groove. The outer diameter of the pin sleeve is the same as the diameter of the bearing section cross-section circle, the inner diameter of the pin sleeve is the same as the outer diameter of the groove, the height of the pin sleeve is the same as the height of the groove, and the opening radius of the second limiting shaft reserved hole on the pin sleeve is greater than the opening radius of the second limiting shaft reserved hole on the groove. The upper bottom length of the slider is the same as the diameter of the limiting shaft, the thickness of the slider is more than twice the diameter of the limiting shaft, the lower bottom length of the slider is less than the chord length of the circle corresponding to its installation position, and the height of the slider is less than the depth of the circular groove. Of the three limiting shafts, the inner ends of two of them are inclined surfaces, and the angle of the inclined surfaces is the same as the angle of the waist of the slider.

5. The new self-anchoring fabricated steel column-to-column spliced joint according to claim 1, characterized in that: The node shell includes a left half shell and a right half shell that are mated together. The mating points on both sides of the left half shell and the right half shell are connected and fixed by locking devices.

6. The new type of assembled steel column-column spliced joint with self-locking capability according to claim 5, characterized in that: The locking mechanism includes a left plate and a right plate that are mated together. The left plate has a left circular arc slide, the opening of which is located above the mating edge of the left plate. A left locking tongue is connected to the left plate. The left locking tongue consists of a slide rod and a stop rod, and is L-shaped. The corner of the left locking tongue is hinged to the left plate via a hinge shaft, and the hinge point is located below the mating edge of the left plate. When the left locking tongue rotates around the hinge shaft, the movement trajectory of the slide rod end coincides with the trajectory of the left circular arc slide. The end of the slide rod has a bolt hole, and the left circular arc slide has a connecting thread. The right plate has a right circular arc slide rail, the opening of which is located below the mating edge of the right plate. A right locking tongue is connected to the right plate. The right locking tongue consists of a slide rod and a stop rod, and is L-shaped. The corner of the right locking tongue is hinged to the right plate via a hinge shaft, and the hinge point is located above the mating edge of the right plate. When the right locking tongue rotates around the hinge shaft, the movement trajectory of the slide rod end coincides with the trajectory of the right circular arc slide rail. The end of the slide rod has a bolt hole, and the right circular arc slide rail has a connecting thread. The left circular arc slide and left locking tongue on the left plate are centrally symmetrically arranged with the right circular arc slide and right locking tongue on the right plate.

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