A pop-up self-locking column-column connection node for assembled steel structures

Abstract

The present invention discloses a pop-up self-locking column-column connection node of an assembled steel structure, which consists of an upper steel column, a lower steel column, an inner sleeve standard part and a self-locking device. A sealing plate is welded to the bottom of the upper steel column to form a closed interface, and a support base is provided on the upper part of the lower steel column. A self-locking device is installed on the support base. The inner sleeve standard part includes an inner sleeve and a trigger push rod. The upper end of the inner sleeve is connected to the sealing plate of the upper steel column through a weld, and the lower end of the inner sleeve is connected to the lower steel column through a self-locking device. The trigger push rod is arranged in the center of the sealing plate of the upper steel column, and the bottom of the trigger push rod abuts against a spring trigger device in the self-locking device. The pop-up self-locking column-column connection node of the present invention realizes on-site welding and bolt-free operation, and is completed as soon as it is installed. It is easy to disassemble, and greatly improves the assembly speed and quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of structural engineering steel structures, and in particular relates to an assembled steel structure pop-up self-locking column-column connection node, which is applied to industrial and civil building structural systems. Background Art

[0002] Industrialization and urbanization are the foundation of modernization, and prefabricated buildings are an important part of building industrialization. At the same time, prefabricated buildings are a major strategic need to promote the transformation and upgrading of residential industrialization and resolve the current overcapacity of steel production. Prefabricated buildings have the characteristics of standardized design of building components, factory processing, and prefabricated construction, which is conducive to reducing environmental pollution caused by construction, shortening the construction period, and saving manpower and material resources. In recent years, the country is vigorously developing the prefabricated building industry and promoting innovation in construction methods.

[0003] Steel structure building is one of the most suitable structural systems for prefabricated buildings, and has been widely used in actual projects at this stage. Nodes are the key to the design of modular steel structure buildings. The reliability of module connections directly affects the overall performance of the structure. At the same time, they should be reasonably constructed, easy to construct, and compatible with the internal decoration and use functions of the modules. It directly affects the construction speed, assembly degree and safety of the structure. Therefore, prefabricated column-column nodes generally use high-strength bolts that are easy to operate, and the arrangement of bolts should be convenient for on-site tightening. Nowadays, due to the increase in construction time and construction difficulty requirements on the construction site, the invention and application of modular steel structure self-locking nodes are gradually increasing. Since no other installation operations are required during installation, the construction efficiency and construction quality are improved, but the node form still needs to be transformed and innovated. Summary of the invention

[0004] The purpose of the present invention is to provide a prefabricated steel structure pop-up self-locking column-column connection node, which is detachable, has high construction efficiency and is safe and reliable in structure.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an assembled steel structure pop-up self-locking column-column connection node, which is composed of an upper steel column, a lower steel column, an inner sleeve standard part and a self-locking device. A sealing plate is welded to the bottom of the upper steel column to form a closed interface, and a support base is provided on the upper inner part of the lower steel column, and the self-locking device is installed on the support base.

[0006] The inner sleeve standard part includes an inner sleeve and a trigger push rod, the upper end of the inner sleeve is connected to the sealing plate of the upper steel column through a weld, and the lower end of the inner sleeve is connected to the lower steel column through a self-locking device. The trigger push rod is arranged in the center of the sealing plate of the upper steel column, and the bottom surface of the trigger push rod has an arc convex portion;

[0007] The self-locking device includes an insertion rod sleeve, an insertion rod, a sleeve fixing frame and a spring trigger device. The sleeve fixing frame is composed of four support plates distributed in a cross shape. An insertion rod sleeve is fixed on each support plate. A pre-loaded spring is provided inside each insertion rod sleeve. The spring trigger device is installed in the center of the sleeve fixing frame. The middle part of the spring trigger device is a circular arc groove matching the circular arc convex portion. The insertion rod is inserted into the insertion rod sleeve and abuts against the pre-loaded spring.

[0008] Preferably, the positions of the lower steel column and the inner sleeve corresponding to the rod insertion sleeve are reserved with rod insertion holes, and the size of the rod insertion hole is adapted to the size of the rod insertion.

[0009] Preferably, the upper steel column and the lower steel column are formed by welding or cold bending, and have a square or circular cross-section.

[0010] Preferably, the inner sleeve is formed by welding or cold bending, and has the same cross-sectional form as the upper steel column and the lower steel column and has a clearance fit.

[0011] Preferably, the support base is cross-shaped, and the four sides of the support base are fixed to the inner wall of the lower steel column by welding.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The on-site self-locking connection realizes no welding or bolting operations on site, and the installation is completed immediately;

[0014] 2. All structural components are prefabricated and processed in the factory;

[0015] 3. The self-locking connection greatly improves the assembly speed and quality, and has a certain strength;

[0016] 4. Easy to disassemble, convenient for post-earthquake repair and replacement of damaged components, and also convenient for demolition after the service life of the structure expires, which is in line with the design concept of the entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the pop-up self-locking column connection node of the assembled steel structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure to be installed of the pop-up self-locking column connection node of the assembled steel structure of the present invention;

[0019] Figure 3 It is an internal disassembly diagram of the pop-up self-locking column connection node of the assembled steel structure of the present invention;

[0020] Figure 4It is a three-dimensional schematic diagram of the upper column and the lower column of the pop-up self-locking column connection node of the assembled steel structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the self-locking device of the pop-up self-locking column connection node of the assembled steel structure of the present invention;

[0022] In the figure, 1-upper section of steel column, 101-sealing plate, 2-lower section of steel column, 201-support device, 3-self-locking device, 301-insertion rod sleeve, 302-insertion rod, 303-sleeve fixing frame, 304-spring triggering device, 305-spring, 4-inner sleeve, 5-triggering push rod, 6-insertion rod hole. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 , Figure 2 As shown, a prefabricated steel structure pop-up self-locking column-column connection node is composed of an upper steel column 1, a lower steel column 2, an inner sleeve standard part and a self-locking device 3. The upper steel column 1 and the lower steel column 2 can be welded or cold-formed, and the cross-section is square or round. In this embodiment, a square tube is used.

[0025] like Figure 3 , Figure 4 As shown, a sealing plate 101 is welded to the bottom of the upper steel column 1 to form a closed interface, and a support base 201 is provided on the inner upper part of the lower steel column 2. The support base 201 is cross-shaped, and the four sides of the support base 201 are respectively fixed to the inner wall of the lower steel column 2 by welding. The self-locking device 3 is installed on the support base 201, and the support base 201 serves to stop the inner sleeve 4 at the specified position during the installation process and to install and fix the self-locking device 3.

[0026] The inner sleeve standard part includes an inner sleeve 4 and a trigger push rod 5. The upper end of the inner sleeve 4 is connected to the sealing plate 101 of the upper steel column 1 through a weld, and the lower end of the inner sleeve 4 is connected to the lower steel column 2 through a self-locking device 3. The trigger push rod 5 is arranged in the center of the sealing plate 101 of the upper steel column 1, and the bottom surface of the trigger push rod 5 has a circular arc convex portion.

[0027] The inner sleeve 4 is formed by welding or cold bending, and has the same cross-sectional form as the upper steel column 1 and the lower steel column 2 and a clearance fit, so that the inner sleeve 4 can be inserted into the lower steel column 2.

[0028] like Figure 3 , Figure 5As shown, the self-locking device 3 includes a rod sleeve 301, a rod 302, a sleeve fixing frame 303 and a spring trigger device 304. The sleeve fixing frame 303 is composed of four support plates distributed in a cross shape. The support plates are perpendicular to the support base 201. A rod sleeve 301 is fixed on each support plate. A pre-loaded spring 305 is arranged inside each rod sleeve 301. The spring trigger device 304 is installed in the center of the sleeve fixing frame 303. The middle part of the spring trigger device 304 is a circular arc groove matching the circular arc convex part. The rod 302 is inserted into the rod sleeve 301 and abuts against the pre-loaded spring 305. The rod 302 is made of high-strength steel with high shear strength.

[0029] A rod insertion hole 6 is reserved at the positions corresponding to the lower steel column 2 and the inner sleeve 4 and the rod insertion sleeve 301 , and the size of the rod insertion hole 6 is adapted to the size of the insertion rod 302 .

[0030] During assembly, the self-locking device 3 is pre-installed at the designated position of the support base 201 of the lower steel column 2. After the lower steel column 2 is installed in place, the standard inner sleeve is installed vertically. During the installation process, the inner sleeve 4 contacts the support base 201 of the lower steel column 2, and the upper steel column 1 reaches the designated position. At this time, the push rod 5 is triggered to press down the spring trigger device 304 in the center of the self-locking device. The spring trigger device is pressed down to unlock the pre-compression spring 305 connected to it. At this time, the inner sleeve 4 and the reserved plug-in rod hole 6 of the lower steel column 2 are precisely aligned with the plug-in rod 302 of the self-locking device 3. The four plug-in rods 302 are pushed into the plug-in rod hole 6 by the spring 305 under the spring pressure, and after reaching the position of the outer wall of the lower steel column 2, they are fixed at the designated position by the clamps reserved on the outer column wall of the plug-in rod hole 6. At this time, the self-locking installation is completed.

[0031] During disassembly, after removing the clamping piece on the outer column wall of the rod insertion hole 6, the insertion rod 302 in the rod insertion hole 6 is pushed back or taken out along the rod insertion sleeve 301 to unlock the node.

[0032] The self-locking device 3 is connected to the lower steel column 2 through the insert rod 302. The inner sleeve 4 and the self-locking device 3 have high strength and rigidity, which can ensure the safe and reliable connection between the columns. The upper steel column 1 and the lower steel column 2 are connected through the inner sleeve 4 with the self-locking device 3. No welding or bolt connection is required on site. They can be used after installation and can be disassembled, which improves construction efficiency.

Claims

1. A pop-up self-locking column connection node for assembled steel structures, characterized in that: The column-to-column connection node is composed of an upper steel column (1), a lower steel column (2), an inner sleeve standard part and a self-locking device (3); a sealing plate (101) is welded to the bottom of the upper steel column (1) to form a closed interface; a support base (201) is provided at the inner upper part of the lower steel column (2); the self-locking device (3) is installed on the support base (201); the inner sleeve standard part includes an inner sleeve (4) and a trigger push rod (5); the upper end of the inner sleeve (4) is connected to the sealing plate (101) of the upper steel column (1) through a weld; the lower end of the inner sleeve (4) is connected to the lower steel column (2) through the self-locking device (3); the trigger push rod (5) is arranged at the center of the sealing plate (101) of the upper steel column (1); the trigger push rod (5) is The bottom surface has an arc convex portion; the self-locking device (3) comprises a rod sleeve (301), a rod (302), a sleeve fixing frame (303) and a spring trigger device (304); the sleeve fixing frame (303) is composed of four support plates arranged in a cross shape, each support plate is fixed with a rod sleeve (301), each rod sleeve (301) is provided with a pre-loaded spring (305) inside, the spring trigger device (304) is installed at the center of the sleeve fixing frame (303), the middle part of the spring trigger device (304) is a circular arc groove matching the arc convex portion, the rod (302) is inserted into the rod sleeve (301) and abuts against the pre-loaded spring (305); A rod insertion hole (6) is reserved at the position corresponding to the lower steel column (2) and the inner sleeve (4) and the rod insertion sleeve (301), and the size of the rod insertion hole (6) is compatible with the size of the insertion rod (302); the support base (201) is cross-shaped, and the four sides of the support base (201) are respectively fixed to the inner wall of the lower steel column (2) by welding.

2. The assembled steel structure pop-up self-locking column connection node according to claim 1 is characterized in that: The upper steel column (1) and the lower steel column (2) are formed by welding or cold bending, and have a square or circular cross-section.

3. The assembled steel structure pop-up self-locking column connection node according to claim 1, characterized in that: The inner sleeve (4) is formed by welding or cold bending, and has the same cross-sectional form as the upper steel column (1) and the lower steel column (2), and has clearance fit.

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