Self-locking combined type novel modular steel structure joint and mounting and dismounting method

Abstract

The invention relates to the technical field of building structures, in particular to a self-locking combined type novel modular steel structure joint and a mounting and dismounting method. Comprising an upper square steel pipe column and a lower square steel pipe column, reserved welding holes and a plurality of lock holes are formed in the side wall of the lower square steel pipe column, and the lock holes are arranged up and down; a groove-shaped steel beam; the lower column inner latch hook assembly is arranged in the lower square steel pipe column and comprises a base and a lower latch hook; the upper column end latch hook assembly comprises an upper column end plate and an upper latch hook; the core area connecting piece comprises a horizontal connecting plate and an inner sleeve; the energy consumption connecting piece and the inclined strut are connected to the joint of the square steel pipe column and the groove-shaped steel beam through bolts. The hook tongues of the upper lock hook assembly and the lower lock hook assembly are embedded with each other, so that stable locking connection is formed. The self-locking structure can effectively prevent the node from loosening or sliding under the load effect, the connection reliability is ensured, and the operation process is simple, convenient and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a self-locking composite novel modular steel structure node and an installation and disassembly method. Background Art

[0002] In the current modular building field, the node connection technology between modules is the key to ensuring structural safety. There are various traditional modular building node connection methods, such as bolt connection, welding connection and prestressed connection. These connection methods have their own advantages and disadvantages. For example, although bolt connection is convenient for construction, it may cause connection failure due to insufficient preload or looseness; welding connection can provide better rigidity and strength, but the workload of on-site welding is large and the welding quality requirements are high; prestressed connection does not require on-site welding, but prestressing needs to be applied during construction, and the construction process is complicated. In addition, if the prestressed connection is not sufficiently prestressed, its bearing capacity is low. There are some common problems with the existing self-locking connection, such as only considering the connection between columns, one connection method is difficult to be applicable to corner columns, side columns, middle columns, and L-shaped column nodes, and often there are high installation precision and inconvenience in observation. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art, and to provide a self-locking composite new modular steel structure node and installation and disassembly method, which has the advantages of efficient and fast construction, reliable connection, clear force transmission path, wide applicability, green and environmentally friendly detachability, etc. The self-locking composite new modular steel structure node can be welded in the factory, and at the construction site, it only needs to be self-lockingly connected and then bolted to strengthen the overall performance of the node to complete the installation; the disassembly process only needs to remove the bolts and then pull the lock post to disassemble, and the operation process is simple and efficient.

[0004] The present invention provides a self-locking composite new modular steel structure node, comprising two sets of upper and lower square steel pipe columns, the side wall of the lower square steel pipe column is provided with a reserved welding hole and two locking holes, and the two locking holes are arranged up and down;

[0005] The channel steel beam is connected to the side wall of the square steel tube column by welding;

[0006] The locking hook assembly in the lower column is placed in the lower square steel pipe column, including a base and a lower locking hook. The lower locking hook structure includes a hook tongue, a hook tongue connecting shaft, a spring, a locking post, a spring outer sleeve and a hook body. The hook tongue is rotatably connected to the hook body through the hook tongue connecting shaft, and an oblique stopper extends from the bottom of the hook tongue. A first groove for inserting the oblique stopper is arranged inside the hook body, and a second groove is arranged on the oblique stopper. A locking post hole is arranged inside the hook body, and a stop ring is arranged in the middle of the locking post. The stop ring divides the locking post into a first part and a second part. The first part of the locking post is inserted into the locking post hole and is engaged with the second groove, and can block the rotation of the oblique stopper, thereby limiting the rotation of the hook tongue. The second part of the locking post is arranged through the locking hole, the spring is sleeved on the outer periphery of the second part of the locking post, the spring outer sleeve is sleeved on the outer periphery of the spring, the spring outer sleeve is fixedly connected to the hook body, the hook body is placed on the top of the base, the geometric center of the hook body coincides with the geometric center of the base, and the geometric center of the side surface of the base coincides with the geometric center of the reserved welding hole.

[0007] The upper column end lock hook assembly includes an upper column end plate and an upper lock hook; the upper column end plate is connected to the upper square steel pipe column, the upper lock hook structure is the same as the lower lock hook structure, the hook tongue in the lower lock hook structure abuts against the hook body in the upper lock hook structure, the hook tongue in the upper lock hook structure abuts against the hook body in the lower lock hook structure, and the two hook tongues are interlocked, so that the two hook tongues form a stable locking connection in the docking state;

[0008] The upper lock hole corresponds to the lock post of the upper lock hook, and the lower lock hole corresponds to the lock post of the lower lock hook, and the center point of the lock hole is on the straight line where the axis of the lock post is located;

[0009] The core area connector includes a horizontal connecting plate and an inner sleeve. The inner sleeve is placed at the bottom of the horizontal connecting plate and inserted into the lower square steel pipe column. The core area connector has limiting and connecting functions. The inner sleeve can play a limiting role when the core area connector is installed. The horizontal connecting plate can connect all modules at the node, enhance the stiffness of the beam end and the integrity of the core area structure.

[0010] The energy-absorbing connectors and diagonal braces are connected at the nodes of the square steel tube columns and the channel steel beams by bolts.

[0011] The top of the inner sleeve of the core area connector is welded flush with the upper surface of the horizontal connecting plate to limit the position and enhance the node stiffness.

[0012] A column end outer ring plate is arranged on the top of the lower square steel pipe, and the square steel pipe column and the column end outer ring plate are connected by welding. The column end outer ring plate is used to strengthen the vertical connection between the upper and lower square steel pipe columns.

[0013] The lower locking hook also includes a latch pin, which is used to lock the hook tongue connecting shaft.

[0014] The base is connected to the lower square steel pipe column by welding, and the welding method is plug welding.

[0015] The diagonal brace is connected to the channel steel beam through high-strength bolts, and the diagonal brace is connected to the square steel pipe column through tension bolts.

[0016] The energy-absorbing connecting piece is connected to the channel-shaped steel beam through high-strength bolts, and the energy-absorbing connecting piece is connected to the square steel pipe column through tension bolts.

[0017] The hook body is connected to the upper column end plate by welding.

[0018] A self-locking composite novel modular steel structure node installation and disassembly method includes the following installation steps:

[0019] S1. Processing parts: Processing square steel pipe columns, channel steel beams, hook bodies, bases, hook tongues, hook tongue connecting shafts, latches, locks, springs, spring outer sleeves, column end outer ring plates, upper column end plates, horizontal connecting plates, inner sleeves, diagonal braces and energy-absorbing connectors in the factory;

[0020] S2. Lock hook production: In the factory, the hook tongue is rotatably connected to the hook body through the hook tongue connecting shaft and fixed by a latch. After the first part of the lock post is inserted into the lock post hole in the hook body, the spring is sleeved on the second part of the lock post, and then the outer sleeve of the spring is sleeved on the outside of the spring and the connection between the outer sleeve of the spring and the hook body is welded;

[0021] S3. The lower lock hook is welded on the base to form a lower column inner lock hook assembly, and the welding position is where the geometric centers of the base and the bottom surface of the hook body coincide. The lower column inner lock hook assembly is placed in the lower square steel pipe column, and is connected by welding when the geometric center of the side surface of the base coincides with the geometric center of the reserved welding hole, and at the same time, the second end of the lower lock post falls into the lower lock hole;

[0022] S4, square steel pipe column and channel steel beam are connected by welding;

[0023] S5. The upper locking hook is welded to the upper column end plate to form an upper column end locking hook assembly; the upper column end locking hook assembly is connected to the bottom of the upper square steel pipe column by welding;

[0024] S6. The lower square steel pipe column is connected to the outer ring plate at the column end by welding;

[0025] S7. The top of the inner sleeve is welded flush with the upper surface of the horizontal connecting plate to form a core area connecting piece;

[0026] S8. After all components are transported to the site, first fix the lower square steel tube column group, then connect the diagonal brace to the node of the lower square steel tube column and the trough steel beam by bolts, then install the core area connector, and then install the upper square steel tube column group. The hook tongue in the lower lock hook structure abuts against the hook body in the upper lock hook structure, and the hook tongue in the upper lock hook structure abuts against the hook body in the lower lock hook structure. The two hook tongues fit each other, and the upper and lower lock hooks are self-lockingly connected. The second end of the upper lock post falls into the upper lock hole. The lock post falls into the lock hole to confirm that the connection and locking are successful. The trough steel beam and the core area connector are connected by high-strength bolts. Finally, the energy-absorbing connector is installed at the node of the upper square steel tube column and the trough steel beam by bolts.

[0027] The method comprises the following steps of disassembly:

[0028] S9, the diagonal brace and the energy dissipation connector are disassembled by removing the corresponding bolts;

[0029] S10, dismantle the core area connectors;

[0030] S11. There is a round hole at the end of the second part of the lock post. When unlocking, a tool can be used to reach into the lock hole and then hook the round hole at the end to pull the lock post so that the end of the lock post passes through the lock hole. A protrusion is provided at the first part of the lock post. At this time, the spring is compressed until the end of the first part of the lock post is separated from the oblique block. At this time, the hook body at the position where the protrusion is located has a third groove corresponding to the protrusion. The lock post is rotated so that the protrusion on the lock post is stuck in the third groove in the hook body. At this time, the constraint of the lock tongue around the lock tongue connecting axis is released, and the hook tongue can rotate around the hook tongue connecting axis to complete the unlocking;

[0031] S12. Use lifting equipment to vertically pull up the upper square steel pipe column to complete the disassembly.

[0032] Compared with the prior art, the present invention has the following beneficial effects: the hook tongues of the upper and lower locking hook assemblies are engaged with each other to form a stable locking connection. This self-locking structure can effectively prevent the node from loosening or slipping under load, ensuring the reliability of the connection. The snap-fit ​​design of the lock post and the elastic support of the spring further limit the rotation of the hook tongue, enhance the anti-slip ability of the node, and maintain stability even under dynamic loads such as earthquakes and wind loads. The self-locking structure of the lock hook assembly and the snap-fit ​​design of the lock post form a double locking mechanism, which can effectively prevent node failure even in extreme cases and ensure the safety of the structure. The node adopts a modular design, and each component can be prefabricated in the factory in advance. Only simple assembly is required on site, which greatly reduces the workload of on-site welding and bolt connection and improves construction efficiency. Due to the self-locking design of the node, when installing, only the lock hook assembly needs to be aligned and engaged to complete the locking. When disassembling, only the snap-fit ​​of the lock post needs to be released. The operation is simple and convenient for maintenance and modification. The energy-absorbing connector is connected to the node of the square steel pipe column and the channel steel beam by bolts. It can effectively dissipate energy in extreme conditions such as earthquakes, reduce the vibration response of the structure, and improve the seismic performance of the node. The spring in the lock hook assembly not only limits the rotation of the hook tongue, but also absorbs part of the energy through elastic deformation when subjected to force, further enhancing the energy dissipation capacity of the node. The upper column end plate and the outer ring plate at the column end have the function of strengthening the connection. The horizontal direction can strengthen the connection between the channel steel beam and the square steel pipe column, and the vertical direction can strengthen the connection between the upper and lower square steel pipe columns to enhance the integrity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the explosion structure of Example 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the exploded structure of the lower column inner locking hook assembly in Example 1 of the present invention;

[0035] Figure 3 It is a schematic diagram of the three-dimensional structure of the lower column inner lock hook assembly in Example 1 of the present invention;

[0036] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper column end locking hook assembly in Example 1 of the present invention;

[0037] Figure 5 This is a schematic diagram of the three-dimensional structure of the hook body in Example 1 of the present invention;

[0038] Figure 6 This is a schematic diagram of the internal structure of the lower column inner lock hook assembly in Example 1 of the present invention;

[0039] Figure 7 This is a schematic diagram of step 2 of the installation method of the present invention;

[0040] Figure 8This is a schematic diagram of step 3 of the installation method of the present invention;

[0041] Fig. 9 This is a schematic diagram of step 4 of the installation method of the present invention;

[0042] Fig.10 This is a schematic diagram of steps 5 and 6 of the installation method of the present invention;

[0043] Figure 11-Figure 14 This is a schematic diagram of step 8 of the installation method of the present invention;

[0044] Fig.15 This is a schematic diagram of the state structure of the lock, protrusion, and spring in step 11 of the disassembly method of the present invention;

[0045] Fig.16 Schematic diagram of the three-dimensional structure of the edge space node in Example 2 of the present invention;

[0046] Fig.17 This is a schematic diagram of the three-dimensional structure of the corner space node in Example 3 of the present invention.

[0047] In the figure: 1, square steel pipe column; 101, reserved welding hole; 102, lock hole; 2, channel steel beam; 3, core area connector; 301, horizontal connecting plate; 302, inner sleeve; 4, upper column end lock hook assembly; 401, upper column end plate; 402, upper lock hook; 5, lower column inner lock hook assembly; 501, base; 502, lower lock hook; 5021, hook tongue; 5022, hook tongue connecting shaft; 5023, spring; 5024, lock post; 5025, spring outer sleeve; 5026, latch; 5027, hook body; 5028, retaining ring; 5029, protrusion; 50210, lock post hole; 50211, oblique stopper; 50212, second groove; 50213, first groove; 6, column end outer ring plate; 7, energy-absorbing connector; 8, oblique brace; 9, tension bolt; 10, high-strength bolt. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with embodiments:

[0049] Example 1

[0050] like Figure 1-Figure 6As shown, a self-locking composite novel modular steel structure node described in the present invention includes two groups of square steel tube columns 1, an upper group and a lower group, each group of square steel tube columns 1 has four square steel tube columns 1, and the side wall of the lower square steel tube column 1 is provided with a reserved welding hole 101 and two locking holes 102, the two locking holes 102 are placed above the welding hole, and the two locking holes 102 are arranged up and down, the upper locking hole 102 corresponds to the locking post 5024 of the upper locking hook 402, and the lower locking hole 102 corresponds to the locking post 5024 of the lower locking hook 502, and the center point of the locking hole 102 is on the straight line where the axis of the locking post 5024 is located; a column end outer ring plate 6 is arranged on the top of the lower square steel tube, and the square steel tube column 1 is connected to the column end outer ring plate 6 by welding, and the column end outer ring plate 6 is used to strengthen the vertical connection of the upper and lower square steel tube columns 1.

[0051] The channel steel beam 2 is connected to the side wall of the square steel pipe column 1 by welding;

[0052] The locking hook assembly 5 in the lower column is placed in the lower square steel pipe column 1, and includes a base 501 and a lower locking hook 502. The structure of the lower locking hook 502 includes a hook tongue 5021, a hook tongue connecting shaft 5022, a spring 5023, a locking post 5024, a spring outer sleeve 5025 and a hook body 5027. The hook tongue 5021 is rotatably connected to the hook body 5027 through the hook tongue connecting shaft 5022. An oblique stopper 50211 extends from the bottom of the hook tongue 5021. A first groove 50213 for inserting the oblique stopper 50211 is arranged inside the hook body 5027, and a second groove 50212 is arranged on the oblique stopper 50211. A locking post hole 50210 is arranged inside the hook body 5027. A retaining ring 5028 is arranged in the middle of the locking post 5024. The retaining ring 5028 divides the locking post 5024 into a first part and a second part. A portion is inserted into the locking post hole 50210 and engaged with the second groove 50212, and can block the rotation of the oblique stopper 50211, thereby limiting the rotation of the hook tongue 5021. The second portion of the locking post 5024 is arranged through the locking hole 102, the spring 5023 is sleeved on the outer periphery of the second portion of the locking post 5024, the spring outer sleeve 5025 is sleeved on the outer periphery of the spring 5023, the spring outer sleeve 5025 is fixedly connected to the hook body 5027, the hook body 5027 is placed on the top of the base 501, the geometric center of the hook body 5027 coincides with the geometric center of the base 501, the side geometric center of the base 501 coincides with the geometric center of the reserved welding hole 101, the base 501 and the lower square steel pipe column 1 are connected by welding, and the welding method is plug welding; the lower locking hook 502 also includes a pin 5026, and the pin 5026 is used to lock the hook tongue connecting shaft 5022.

[0053] The upper column end locking hook assembly 4 includes an upper column end plate 401 and an upper locking hook 402; the upper column end plate 401 is connected to the square steel pipe column 1, the upper locking hook 402 has the same structure as the lower locking hook 502, the hook tongue 5021 in the lower locking hook 502 structure abuts against the hook body 5027 in the upper locking hook 402 structure, the hook tongue 5021 in the upper locking hook 402 structure abuts against the hook body 5027 in the lower locking hook 502 structure, the two hook tongues 5021 are interlocked, so that the two hook tongues 5021 form a stable locking connection in the docking state; the hook body 5027 is connected to the upper column end plate 401 by welding.

[0054] The core area connector 3 includes a horizontal connecting plate 301 and an inner sleeve 302. The inner sleeve 302 is placed at the bottom of the horizontal connecting plate 301 and inserted into the lower square steel pipe column 1. The top of the inner sleeve 302 of the core area connector 3 is welded flush with the upper surface of the horizontal connecting plate 301 to limit and enhance the node stiffness.

[0055] The energy dissipation connector 7 and the diagonal brace 8 are connected to the node of the square steel pipe column 1 and the channel steel beam 2 by bolts. The diagonal brace 8 is connected to the channel steel beam 2 by high-strength bolts 10, and the diagonal brace 8 is connected to the square steel pipe column 1 by tension bolts 9. The energy dissipation connector 7 is connected to the channel steel beam 2 by high-strength bolts 10, and the energy dissipation connector 7 is connected to the square steel pipe column 1 by tension bolts 9.

[0056] A self-locking composite novel modular steel structure node installation and disassembly method includes the following installation steps:

[0057] S1. Processing parts: Processing square steel pipe column 1, channel steel beam 2, hook body 5027, base 501, hook tongue 5021, hook tongue connecting shaft 5022, latch 5026, lock post 5024, spring 5023, spring outer sleeve 5025, column end outer ring plate 6, upper column end plate 401, horizontal connecting plate 301, inner sleeve 302, diagonal brace 8 and energy dissipation connector 7 in the factory;

[0058] S2. Lock hook production: In the factory, the hook tongue 5021 is rotatably connected to the hook body 5027 through the hook tongue connecting shaft 5022 and fixed by the latch 5026. After the first part of the lock post 5024 is inserted into the lock post hole 50210 in the hook body 5027, the spring 5023 is sleeved on the second part of the lock post 5024, and then the spring outer sleeve 5025 is sleeved on the outside of the spring 5023 and the connection between the spring outer sleeve 5025 and the hook body 5027 is welded; one end of the spring 5023 is connected to the spring outer sleeve 5025, and the other end presses the retaining ring 5028, so that the elastic force will press the lock post 5024 toward the inside of the hook body 5027, and when locked, the lock post 5024 will fall into the second groove 50212 on the oblique block 50211, as shown in FIG. Figure 7 shown.

[0059] S3, the lower locking hook 502 is welded on the base to form the lower column inner locking hook assembly 5, and the welding position is the geometric center of the base and the bottom surface of the hook body 5027 coincides; the lower column inner locking hook assembly 5 is placed in the lower square steel pipe column 1, and is connected by welding when the geometric center of the side of the base coincides with the geometric center of the reserved welding hole 101, and at the same time, the second end of the lower locking post 5024 falls into the lower locking hole 102; Figure 8 shown.

[0060] S4, the square steel pipe column 1 and the channel steel beam 2 are connected by welding; Fig. 9 shown.

[0061] S5. The upper locking hook 402 is welded to the upper column end plate 401 to form the upper column end locking hook assembly 4; the upper column end locking hook assembly 4 is connected to the bottom of the upper square steel pipe column 1 by welding;

[0062] S6, the lower square steel pipe column 1 is connected to the outer ring plate 6 at the column end by welding; Fig.10 shown.

[0063] S7, the top of the inner sleeve 302 is welded flush with the upper surface of the horizontal connecting plate 301 to form the core area connecting piece 3; Fig.10 shown.

[0064] S8. After all components are transported to the site, first fix the lower square steel pipe column 1 group, then connect the diagonal brace 8 to the node of the lower square steel pipe column 1 and the trough steel beam 2 by bolts, then install the core area connector 3, and then install the upper square steel pipe column 1 group, the hook tongue 5021 in the lower lock hook 502 structure abuts against the hook body 5027 in the upper lock hook 402 structure, the hook tongue 5021 in the upper lock hook 402 structure abuts against the hook body 5027 in the lower lock hook 502 structure, the two hook tongues 5021 fit each other, the upper and lower lock hooks are self-lockingly docked, the second end of the upper lock post 5024 falls into the upper lock hole 102, and the lock post 5024 is observed through the lock hole 102 to confirm that the docking and locking are successful, the trough steel beam 2 and the core area connector 3 are connected by high-strength bolts 10, and finally, the energy-absorbing connector 7 is installed at the node of the upper square steel pipe column 1 and the trough steel beam 2 by bolts. Figure 11-Figure 14 shown.

[0065] The disassembly steps include:

[0066] S9, the diagonal brace 8 and the energy dissipation connector 7 are disassembled by removing the corresponding bolts;

[0067] S10, disassembling the core area connector 3;

[0068] S11. The second end of the lock post 5024 has a round hole. When unlocking, a tool can be inserted into the lock hole and then hooked into the round hole at the end to pull the lock post 5024 so that the end thereof passes through the lock hole 102. The first part of the lock post 5024 is provided with a protrusion 5029. At this time, the spring 5023 is compressed until the first end of the lock post 5024 is separated from the oblique block 50211. At this time, the hook body 5027 at the position where the protrusion 5029 is located has a third groove corresponding to the protrusion 5029. The lock post 5024 is rotated so that the protrusion 5029 on the lock post 5024 is inserted into the third groove in the hook body 5027. Fig.15 At this time, the constraint of the lock tongue around the lock tongue connecting axis is released, and the hook tongue 5021 can rotate around the hook tongue connecting axis 5022 to complete unlocking;

[0069] S12. Use a lifting device to vertically pull up the upper square steel pipe column 1 to complete the disassembly.

[0070] Example 2

[0071] The difference from Example 1 is that, for the edge space node, the number of upper and lower square steel pipe columns 1 is two respectively, such as Fig.16 shown.

[0072] Example 3

[0073] The difference from Example 1 is that, for the corner space node, the number of the upper and lower square steel pipe columns 1 is one respectively, such as Fig.17 shown.

[0074] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A self-locking composite new modular steel structure node, characterized in that: include Two sets of upper and lower square steel pipe columns (1), the side wall of the lower square steel pipe column (1) is provided with a reserved welding hole (101) and two locking holes (102), and the two locking holes (102) are arranged up and down; The channel steel beam (2) is connected to the side wall of the square steel pipe column (1) by welding; The lower column inner lock hook assembly (5) is placed in the lower square steel pipe column (1), and comprises a base (501) and a lower lock hook (502). The lower lock hook (502) comprises a hook tongue (5021), a hook tongue connecting shaft (5022), a spring (5023), a lock post (5024), a spring outer sleeve (5025) and a hook body (5027). The hook tongue (5021) is connected to the hook tongue through the hook tongue connecting shaft (5022). The hook body (5027) is rotatably connected, an oblique stopper (50211) extends from the bottom of the hook tongue (5021), a first groove (50213) for inserting the oblique stopper (50211) is arranged inside the hook body (5027), a second groove (50212) is arranged on the oblique stopper (50211), a locking post hole (50210) is arranged inside the hook body (5027), and a retaining ring is arranged in the middle of the locking post (5024) (5028), the retaining ring (5028) divides the locking post (5024) into a first part and a second part, the first part of the locking post (5024) is inserted into the locking post hole (50210) and is engaged with the second groove (50212), and can block the rotation of the inclined stopper (50211), thereby limiting the rotation of the hook tongue (5021), the second part of the locking post (5024) is arranged through the locking hole (102), the spring (5023) is sleeved on the outer periphery of the second part of the locking post (5024), the spring outer sleeve (5025) is sleeved on the outer periphery of the spring (5023), the spring outer sleeve (5025) is fixedly connected to the hook body (5027), the hook body (5027) is placed on the top of the base (501), the geometric center of the hook body (5027) coincides with the geometric center of the base (501), and the geometric center of the side surface of the base (501) coincides with the geometric center of the reserved welding hole (101); The upper column end locking hook assembly (4) comprises an upper column end plate (401) and an upper locking hook (402); the upper column end plate (401) is connected to the upper square steel pipe column (1); the structure of the upper locking hook (402) is the same as that of the lower locking hook (502); the hook tongue (5021) in the lower locking hook (502) structure abuts against the hook body (5027) in the upper locking hook (402) structure; the hook tongue (5021) in the upper locking hook (402) structure abuts against the hook body (5027) in the lower locking hook (502) structure; the two hook tongues (5021) are interlocked, so that the two hook tongues (5021) form a stable locking connection in the docking state; The upper locking hole (102) corresponds to the locking post (5024) of the upper locking hook (402), the lower locking hole (102) corresponds to the locking post (5024) of the lower locking hook (502), and the center point of the locking hole (102) is on the straight line where the axis of the locking post (5024) is located; The core area connecting member (3) comprises a horizontal connecting plate (301) and an inner sleeve (302), wherein the inner sleeve (302) is placed at the bottom of the horizontal connecting plate (301), and the inner sleeve (302) is inserted into the lower square steel pipe column (1); The energy-absorbing connecting piece (7) and the diagonal brace (8) are connected to the node between the square steel pipe column (1) and the channel steel beam (2) by means of bolts.

2. The self-locking composite new modular steel structure node according to claim 1 is characterized in that: The top of the inner sleeve (302) of the core area connecting piece (3) is welded flush with the upper surface of the horizontal connecting plate (301) to limit the position and enhance the node rigidity.

3. The self-locking composite new modular steel structure node according to claim 2 is characterized in that: A column end outer ring plate (6) is arranged on the top of the lower square steel pipe, and the square steel pipe column (1) and the column end outer ring plate (6) are connected by welding. The column end outer ring plate (6) is used to strengthen the vertical connection between the upper and lower square steel pipe columns (1).

4. The self-locking composite new modular steel structure node according to claim 3 is characterized in that: The lower locking hook (502) further comprises a latch (5026) which is used to lock the hook-knuckle connecting shaft (5022).

5. The self-locking composite new modular steel structure node according to claim 4 is characterized in that: The base (501) and the lower square steel pipe column (1) are connected by welding, and the welding method is plug welding.

6. The self-locking composite new modular steel structure node according to any one of claims 1 to 5, characterized in that: The diagonal brace (8) is connected to the channel steel beam (2) via high-strength bolts (10), and the diagonal brace (8) is connected to the square steel pipe column (1) via tension bolts (9).

7. The self-locking composite new modular steel structure node according to claim 6 is characterized in that: The energy-absorbing connecting piece (7) is connected to the channel-shaped steel beam (2) via high-strength bolts (10), and the energy-absorbing connecting piece (7) is connected to the square steel pipe column (1) via tension bolts (9).

8. The self-locking composite new modular steel structure node according to claim 7 is characterized in that: The hook body (5027) is connected to the upper column end plate (401) by welding.

9. A method for installing and disassembling a self-locking composite new modular steel structure node according to claim 8, characterized in that: The installation steps include: S1. Processing parts: Processing in the factory square steel pipe column (1), channel steel beam (2), hook body (5027), base (501), hook tongue (5021), hook tongue connecting shaft (5022), latch (5026), lock post (5024), spring (5023), spring outer sleeve (5025), column end outer ring plate (6), upper column end plate (401), horizontal connecting plate (301), inner sleeve (302), diagonal brace (8) and energy dissipation connector (7); S2, manufacturing of the lock hook: in the factory, the hook tongue (5021) is rotatably connected to the hook body (5027) through the hook tongue connecting shaft (5022), and fixed by the latch (5026), and the first part of the lock post (5024) is inserted into the lock post hole (50210) in the hook body (5027), and then the spring (5023) is sleeved on the second part of the lock post (5024), and then the spring outer sleeve (5025) is sleeved on the outside of the spring (5023) and the connection between the spring outer sleeve (5025) and the hook body (5027) is welded; S3, the lower locking hook (502) is welded on the base to form the lower column inner locking hook assembly (5), and the welding position is the point where the geometric centers of the base and the bottom surface of the hook body (5027) coincide; the lower column inner locking hook assembly (5) is placed in the lower square steel pipe column (1), and connected by welding when the geometric center of the side surface of the base coincides with the geometric center of the reserved welding hole (101), and at the same time, the second end of the lower locking post (5024) falls into the lower locking hole (102); S4, the square steel tube column (1) and the channel steel beam (2) are connected by welding; S5, the upper locking hook (402) is welded to the upper column end plate (401) to form an upper column end locking hook assembly (4); the upper column end locking hook assembly (4) is connected to the bottom of the upper square steel pipe column (1) by welding; S6, the lower square steel pipe column (1) is connected to the outer ring plate (6) at the column end by welding; S7, the top of the inner sleeve (302) is welded flush with the upper surface of the horizontal connecting plate (301) to form a core area connecting piece (3); S8. After the components are transported to the site, the lower square steel pipe column (1) group is first fixed, and then the diagonal brace (8) is connected to the node of the lower square steel pipe column (1) and the channel steel beam (2) by bolts, and then the core area connector (3) is installed. Then, the upper square steel pipe column (1) group is installed, and the hook tongue (5021) in the lower lock hook (502) structure is abutted against the hook body (5027) in the upper lock hook (402) structure, and the hook tongue (5021) in the upper lock hook (402) structure is in contact with the lower lock hook (502) structure. The hook body (5027) in the middle is abutted, the two hook tongues (5021) are interlocked, the upper and lower locking hooks are self-lockingly connected, the second end of the upper locking post (5024) falls into the upper locking hole (102), and the locking post (5024) is observed through the locking hole (102) to confirm that the connection and locking are successful. The channel steel beam (2) and the core area connecting piece (3) are connected by high-strength bolts (10). Finally, the energy-absorbing connecting piece (7) is installed at the node between the upper square steel pipe column (1) and the channel steel beam (2) by bolts.

10. The self-locking composite new modular steel structure node installation and disassembly method according to claim 9 is characterized in that: The disassembly steps include: S9, the diagonal brace (8) and the energy dissipation connector (7) are disassembled by removing corresponding bolts; S10, disassembling the core area connector (3); S11, the second end of the lock post (5024) has a round hole. When unlocking, a tool can be inserted into the lock hole and then hooked into the round hole at the end to pull the lock post (5024) so ​​that the end thereof passes through the lock hole (102). A protrusion (5029) is provided at the first part of the lock post (5024). At this time, the spring (5023) is compressed until the first end of the lock post (5024) is separated from the oblique stopper (50211). At this time, a third groove is provided inside the hook body (5027) at the position where the protrusion (5029) is located, corresponding to the protrusion (5029). The lock post (5024) is rotated so that the protrusion (5029) on the lock post (5024) is inserted into the third groove in the hook body (5027). At this time, the constraint of the lock tongue around the lock tongue connecting axis is released, and the hook tongue (5021) can rotate around the hook tongue connecting axis (5022) to complete the unlocking. S12. The upper square steel pipe column (1) is vertically pulled up by a lifting device to complete the disassembly.

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