A high fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building

Abstract

The present invention discloses a high-fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building. The present invention relates to the technical field of construction engineering and includes a lower corner piece, a connecting plate, a tapered tenon piece, a rotating latch, a spring, a rib plate, a rotating shaft, an upper corner piece, an upper column, a lower column, and an unlocking piece; the lower corner piece is connected to the lower column, the connecting plate is placed on the lower corner piece, and a connection hole is provided in the middle of the connecting plate. The tapered tenon piece passes through the connection hole and is fixed on the lower corner piece. The upper corner piece is connected to the bottom of the upper column. The lower diameter of the lower part of the tapered thread of this technical solution is smaller, and the upper hole diameter of the tapered threaded hole is larger. Therefore, it has a high fault tolerance when being screwed in. The opening diameters of the tapered unlocking bolt hole and the tapered unlocking bolt groove are much smaller than the upper hole of the upper corner piece, and the tapered design cooperates with the unlocking tapered thread head, enabling a large fault tolerance space to connect with the unlocking tapered thread head to complete unlocking.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly to a high-fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building. Background Technique

[0002] A steel structure modular building is a highly prefabricated building, which divides traditional houses into building module units with a single room or a certain three-dimensional building space, prefabricates and produces them in a factory, and quickly assembles them into a building whole on site through connection nodes.

[0003] Different from the traditional building construction method, since a certain beam-column system already exists when the modules leave the factory, there will be a situation of multiple beams and columns at the node position after the modules are assembled. A socket-type bolt connection node structure for a steel structure modular building disclosed in the authorized publication number CN217734350U includes an upper box-shaped steel column, a lower box-shaped steel column, an upper box-shaped I-beam, a lower box-shaped I-beam, an upper plug-in member, a lower receiving member, and bolts.

[0004] This technical solution connects multiple bolts corresponding to the limit holes of the receiving member and the limit holes of the plug-in member respectively. However, due to the high precision requirements during the installation of the modular building, this method that requires precise docking has a low fault tolerance rate during actual manual installation, and each bolt needs to be screwed one by one during installation and unlocking. Therefore, this connection node cannot quickly self-lock and quickly unlock, and the bolts exposed outside are also easily loosened by others, having a certain safety hazard. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building, which solves the problems existing in the above prior art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A high-fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building includes a lower corner piece, a connecting plate, a tapered tenon piece, a rotating catch, a spring, a rib plate, a rotating shaft, an upper corner piece, an upper column, a lower column, and an unlocking piece;

[0007] The lower corner piece is connected to the lower column, the connecting plate is placed on the lower corner piece, and a connection hole is provided in the middle of the connecting plate. The tapered tenon piece passes through the connection hole and is fixed on the lower corner piece. The upper corner piece is connected to the bottom of the upper column, and the bottom of the upper corner piece is in contact with the connecting plate;

[0008] A pair of parallelly distributed rib plates are respectively provided on the four inner sides of the upper corner piece. The rotating catches are respectively arranged between each pair of rib plates. At least two springs connected to the inner wall of the upper corner piece are provided on the back of each rotating catch. A rotating shaft is provided on each pair of rib plates, and the rotating catch is connected to the rotating shaft;

[0009] The conical tenon is connected to the rotating catch through the contact surface;

[0010] A connecting piece is arranged at the top of the conical tenon, and the unlocking piece is fixed to the connecting piece to achieve unlocking.

[0011] Preferably, a conical threaded hole is arranged in the middle of the lower corner piece.

[0012] Preferably, a conical tenon thread connected to the conical threaded hole is arranged at the bottom of the conical tenon. A first layer of tenon and a second layer of tenon are arranged on the conical tenon. Upper tenon slopes are arranged at the tops of the first layer of tenon and the second layer of tenon, and lower tenon slopes are arranged at the bottoms of the first layer of tenon and the second layer of tenon.

[0013] Preferably, a first layer of catch and a second layer of catch are arranged on the rotating catch. Upper catch slopes are arranged at the tops of the first layer of catch and the second layer of catch, and lower catch slopes are arranged at the bottoms of the first layer of catch and the second layer of catch. A catch rotating shaft hole connected to the rotating shaft is arranged on the rotating catch. Among them, the lower tenon slope of the first layer of tenon is in contact with the upper catch slope of the first layer of catch, the upper tenon slope of the second layer of tenon is in contact with the lower catch slope of the first layer of catch, and the lower tenon slope of the second layer of tenon is in contact with the upper catch slope of the second layer of catch.

[0014] Preferably, an upper hole is arranged at the top of the upper corner piece, and a lower hole is arranged at the bottom of the upper corner piece.

[0015] Preferably, the unlocking piece includes an unlocking rod, and the unlocking rod includes an unlocking rod handle and an unlocking conical thread head arranged at the bottom of the unlocking rod handle.

[0016] Preferably, the connecting piece is a conical unlocking bolt hole arranged at the top of the conical tenon, and the conical unlocking bolt hole matches the unlocking conical thread head.

[0017] Preferably, the connecting member includes a groove formed at the top of the tapered tenon, and a tapered unlocking bolt groove matching the unlocking tapered thread head is fitted and connected to the inner wall of the top of the groove. The bottom of the tapered unlocking bolt groove is connected to an electric telescopic rod arranged in the groove. A slide rail is vertically arranged in the groove, and a slide rod connected to the tapered unlocking bolt groove is slidably connected to the top of the slide rail. Guide rods are arranged on both inner walls of the groove, and a retaining rod is slidably sleeved on the guide rods. The bottom of the retaining rod is meshed and connected with a transmission gear, and the transmission gear is arranged on a transmission shaft connected to the groove. Tooth plates are arranged on both sides of the tapered unlocking bolt groove, and driving gears are meshed and connected to the mutually remote sides of the two tooth plates. The driving gears are arranged on a driving shaft connected to the groove, a driving belt pulley is arranged on the driving shaft, a transmission double-groove belt pulley is arranged on the transmission shaft, and a driving belt is arranged between the driving belt pulley and the transmission double-groove belt pulley.

[0018] Preferably, anti-rotation rods horizontally penetrate through both sides of the upper inclined surface of the tenon at the top of the first-layer tenon. The top of the anti-rotation rod is meshed and connected with a driven gear, and the driven gear is arranged on a driven shaft connected to the groove. A driven belt pulley is arranged on the driven shaft, and a driven belt is arranged between the driven belt pulley and the transmission double-groove belt pulley.

[0019] The present invention provides a high-fault-tolerance self-locking and quick-unlocking connection node for a steel structure modular building. Compared with the prior art, it has the following beneficial effects:

[0020] 1. In this technical solution, the lower diameter of the tapered thread is smaller, and the upper hole diameter of the tapered thread hole is larger. Therefore, it has a higher fault tolerance during screwing. The opening diameters of the tapered unlocking bolt hole and the tapered unlocking bolt groove are much smaller than the upper hole of the upper corner piece, and the tapered design cooperates with the unlocking tapered thread head, enabling a larger fault-tolerance space to complete the connection with the unlocking tapered thread head and achieve unlocking; the tapered tenon has two layers of tenons, the rotary latch has two layers of latches, and there is a certain fault-tolerance distance between the tapered tenon and the rib plate. Therefore, it has a higher fault-tolerance rate during the connection process. Through the contact surface connection of the tapered tenon and the rotary latch, quick self-locking connection is achieved. By connecting the unlocking member with the connecting member and then loosening the tapered thread, the tapered tenon is pulled up to the upper column, and unlocking can be quickly realized.

[0021] 2. The technical solution is provided with a liftable conical unlocking bolt groove. After self-locking, the conical unlocking bolt groove can be retracted downward. While retracting, the blocking rod automatically moves towards the opposite side. Then, after retraction, the blocking rod can move above the conical unlocking bolt groove to block the conical unlocking bolt groove, thus preventing others from privately connecting an unlocking piece to the conical unlocking bolt groove for unlocking and improving safety. When the conical unlocking bolt groove is retracted downward, the two blocking rods move towards the opposite side. At this time, the two anti-rotation rods move away from each other, so that the two anti-rotation rods can extend between the two pairs of rib plates on both sides, thereby increasing the rotation radius of the tapered tenon. When the tapered tenon rotates, the rib plates will prevent the anti-rotation rods from rotating, so that after the conical unlocking bolt groove is retracted downward, it is avoided that others use tools to clamp the first-layer tenon and rotate it to loosen the tapered thread on the tapered tenon, thus further improving the stability after self-locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural decomposition diagram of the present invention in a disassembled state;

[0023] Figure 2 is a schematic diagram of the lower corner piece of the present invention;

[0024] Figure 3 is a schematic diagram of the connecting plate of the present invention;

[0025] Figure 4 is a schematic diagram of the tapered tenon of the present invention;

[0026] Figure 5 is a schematic diagram of the rotary catch of the present invention;

[0027] Figure 6 is a schematic diagram of the rib plate and the rotating shaft of the present invention;

[0028] Figure 7 is a schematic diagram of the upper corner piece of the present invention;

[0029] Figure 8 is a schematic diagram of the unlocking rod of the present invention;

[0030] Figure 9 is a schematic cross-sectional view of the present invention in a connected state;

[0031] Figure 10 is a schematic diagram of the second embodiment of the connecting piece of the present invention;

[0032] Figure 11 is a schematic cross-sectional view of the second embodiment of the connecting piece of the present invention;

[0033] Figure 12 is a schematic diagram of the blocking rod and the anti-rotation rod of the present invention.

[0034] In the figure: 1, lower corner piece; 2, connecting plate; 3, tapered tenon piece; 4, rotating catch; 5, spring; 6, rib plate; 7, rotating shaft; 8, upper corner piece; 9, upper column; 10, lower column; 11, unlocking rod; 1-1, tapered threaded hole; 2-1, connecting hole; 3-1, tapered head thread; 3-2, tapered unlocking bolt hole; 3-3, second-layer tenon head; 3-4, first-layer tenon head; 3-5, upper inclined surface of tenon head; 3-6, lower inclined surface of tenon head; 4-1, first-layer catch; 4-2, second-layer catch; 4-3, upper inclined surface of catch; 4-4, lower inclined surface of catch; 4-5, catch rotating shaft hole; 8-1, upper hole; 8-2, lower hole; 11-1, unlocking tapered threaded head; 11-2, unlocking rod handle; 12, groove; 13, tapered unlocking bolt groove; 14, electric telescopic rod; 15, guide rod; 16, stop rod; 17, transmission shaft; 18, transmission gear; 19, toothed plate; 20, driving gear; 21, driving shaft; 22, driving pulley; 23, transmission double-groove pulley; 24, driving belt; 25, anti-rotation rod; 26, driven gear; 27, driven shaft; 28, driven pulley; 29, driven belt; 30, sliding rod; 31, sliding rail. Specific implementation mode

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Refer to Figures 1 - 12 , the present invention provides the following three technical solutions:

[0037] The first implementation mode: A high-tolerance self-locking and quick-unlocking connection node for a steel structure modular building, including a lower corner piece 1, a connecting plate 2, a tapered tenon piece 3, a rotating catch 4, a spring 5, a rib plate 6, a rotating shaft 7, an upper corner piece 8, an upper column 9, a lower column 10, and an unlocking member;

[0038] The lower corner piece 1 is connected to the lower column 10, and welding can be used here. The connecting plate 2 is placed on the lower corner piece 1, and a connecting hole 2-1 is provided in the middle of the connecting plate 2. The tapered tenon piece 3 passes through the connecting hole 2-1 and is fixed on the lower corner piece 1. Here, it is rotated and tightened after insertion. The upper corner piece 8 is connected to the bottom of the upper column 9, and welding can be used here. The bottom of the upper corner piece 8 is in contact with the connecting plate 2;

[0039] On the inner four sides of the upper corner fitting 8, a pair of parallelly distributed rib plates 6 are respectively provided. The rotary catches 4 are respectively arranged between each pair of rib plates 6. At least two springs 5 connected to the inner wall of the upper corner fitting 8 are arranged on the back of each rotary catch 4, so that the springs 5 can be shortened when the rotary catches 4 are squeezed. A rotating shaft 7 is arranged on each pair of rib plates 6, and the rotary catch 4 is connected to the rotating shaft 7 to facilitate the insertion of the tapered tenon 3 onto the rotary catch 4;

[0040] The tapered tenon 3 and the rotary catch 4 are connected through the contact surface, thereby realizing self-locking;

[0041] A connecting piece is arranged at the top of the tapered tenon 3, and the unlocking piece is fixed to the connecting piece to achieve unlocking.

[0042] A tapered threaded hole 1-1 is arranged in the middle of the lower corner fitting 1.

[0043] A tapered thread 3-1 connected to the tapered threaded hole 1-1 is arranged at the bottom of the tapered tenon 3. The lower diameter of the lower part of the tapered thread 3-1 is smaller, and the upper hole diameter of the tapered threaded hole 1-1 is larger. Therefore, there is a higher tolerance during screwing. A first layer of tenon 3-4 and a second layer of tenon 3-3 are arranged on the tapered tenon 3, and a tenon upper inclined surface 3-5 is arranged at the top of both the first layer of tenon 3-4 and the second layer of tenon 3-3, and a tenon lower inclined surface 3-6 is arranged at the bottom of both the first layer of tenon 3-4 and the second layer of tenon 3-3.

[0044] A first layer of catch 4-1 and a second layer of catch 4-2 are arranged on the rotary catch 4, and a catch upper inclined surface 4-3 is arranged at the top of both the first layer of catch 4-1 and the second layer of catch 4-2, and a catch lower inclined surface 4-4 is arranged at the bottom of both the first layer of catch 4-1 and the second layer of catch 4-2. A catch rotating shaft hole 4-5 connected to the rotating shaft 7 is arranged on the rotary catch 4. Among them, the tenon lower inclined surface 3-6 of the first layer of tenon 3-4 is in contact with the catch upper inclined surface 4-3 of the first layer of catch 4-1, the tenon upper inclined surface 3-5 of the second layer of tenon 3-3 is in contact with the catch lower inclined surface 4-4 of the first layer of catch 4-1, and the tenon lower inclined surface 3-6 of the second layer of tenon 3-3 is in contact with the catch upper inclined surface 4-3 of the second layer of catch 4-2 to achieve contact connection.

[0045] An upper hole 8-1 is arranged at the top of the upper corner fitting 8, and a lower hole 8-2 is arranged at the bottom of the upper corner fitting 8. The upper hole 8-1 is used for the unlocking rod 11 to pass through during unlocking, and the lower hole 8-2 is used for the tapered tenon 3 to pass through during connection.

[0046] The unlocking piece includes an unlocking rod 11. The unlocking rod 11 includes an unlocking rod handle 11-2 and an unlocking tapered thread head 11-1 arranged at the bottom of the unlocking rod handle 11-2.

[0047] The connecting piece is a conical unlocking bolt hole 3-2 provided at the top of the tapered tenon 3, and the conical unlocking bolt hole 3-2 is matched with the unlocking conical thread head 11-1. The conical unlocking bolt hole 3-2 and the unlocking conical thread head 11-1 cooperate with each other, and there can be a large tolerance space to complete the unlocking of the connection. When unlocking, the unlocking conical thread head 11-1 and the conical unlocking bolt hole 3-2 are tightened and connected. The unlocking rod handle 11-2 is used to tighten it during unlocking and then lift the tapered tenon 3 upward.

[0048] The second implementation mode is mainly different from the first implementation mode in that: the connecting piece includes a groove 12 opened at the top of the tapered tenon 3. The inner wall of the top of the groove 12 is fitted and connected with a conical unlocking bolt groove 13 that is matched with the unlocking conical thread head 11-1. The unlocking conical thread head 11-1 and the conical unlocking bolt groove 13 can also be tightened and connected. The bottom of the conical unlocking bolt groove 13 is connected to an electric telescopic rod 14 arranged in the groove 12. The electric telescopic rod 14 can be powered and remotely controlled by existing technologies. A slide rail 31 is vertically arranged in the groove 12, and a slide rod 30 connected to the conical unlocking bolt groove 13 is slidably connected to the top of the slide rail 31, which can guide the conical unlocking bolt groove 13. When the conical unlocking bolt groove 13 rotates under force, it is convenient to drive the tapered tenon 3 to rotate. Guide rods 15 are arranged on both inner walls of the groove 12, and a blocking rod 16 is slidably sleeved on the guide rods 15. In order to enable the blocking rod 16 to move to the required position, a transmission gear 18 is meshed and connected to the bottom of the blocking rod 16. The transmission gear 18 is arranged on a transmission shaft 17 connected to the groove 12. Tooth plates 19 are arranged on both sides of the conical unlocking bolt groove 13. Driving gears 20 are meshed and connected to the sides of the two tooth plates 19 away from each other. The driving gears 20 are arranged on a driving shaft 21 connected to the groove 12. A driving belt pulley 22 is arranged on the driving shaft 21, and a transmission double-groove pulley 23 is arranged on the transmission shaft 17. A driving belt 24 is arranged between the driving belt pulley 22 and the transmission double-groove pulley 23. Among them, a belt tension pulley can be used at the driving belt 24 to ensure the tension force.

[0049] The tooth plate 19 drives the driving gear 20 to rotate, so that the driving belt 24 drives the transmission gear 18 to rotate, and then drives the blocking rod 16 to move.

[0050] After self-locking, the conical unlocking bolt groove 13 is retracted downward. While retracting, the blocking rod 16 automatically moves towards the opposite side. Then, after retraction, the blocking rod 16 can move above the conical unlocking bolt groove 13 to block the conical unlocking bolt groove 13, thereby preventing others from using the unlocking conical thread head 11-1 and the conical unlocking bolt groove 13 to connect and unlock privately, improving the safety.

[0051] The third implementation mode, the main difference from the second implementation mode is that anti-rotation rods 25 penetrate horizontally on both sides of the upper inclined surface 3-5 of the tenon head at the top of the first-layer tenon head 3-4. A driven gear 26 is meshed and connected to the top of the anti-rotation rod 25. The driven gear 26 is arranged on a driven shaft 27 connected to the groove 12. A driven pulley 28 is arranged on the driven shaft 27. A driven belt 29 is arranged between the driven pulley 28 and the transmission double-groove pulley 23. Among them, a belt tensioner can also be used at the driven belt 29 to maintain the tension force.

[0052] The transmission double-groove pulley 23 rotates, causing the driven pulley 28 to drive the driven gear 26 to rotate. As a result, the anti-rotation rod 25 can extend out of the upper inclined surface 3-5 of the tenon head at the top of the first-layer tenon head 3-4, and thus can enter between the paired ribs 6 on both sides. By increasing the rotation radius of the tapered tenon 3, when the tapered tenon 3 rotates, the rib 6 will hinder the rotation of the anti-rotation rod 25. After the tapered unlocking bolt groove 13 is retracted downward, it prevents others from loosening the tapered thread 3-1 on the tapered tenon 3 by using a tool to clamp and rotate the first-layer tenon head 3-4, thereby further improving the stability after self-locking.

[0053] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0054] During use, connect the tapered tenon 3 with the tapered threaded hole 1-1, and the contact surface between the tapered tenon 3 and the rotating catch 4 can be connected to achieve self-locking. After self-locking is completed, make the tapered unlocking bolt groove 13 retract downward, and the blocking rod 16 can be moved to block above the tapered unlocking bolt groove 13, and the anti-rotation rod 25 extends between each pair of ribs 6 on both sides, so that it cannot be unlocked through the tapered unlocking bolt groove 13, nor can it be unlocked by clamping and rotating the first-layer tenon head 3-4. When unlocking is required, move the tapered unlocking bolt groove 13 upward to reset, and the blocking rod 16 and the anti-rotation rod 25 can be retracted. At this time, screw the unlocking tapered thread head 11-1 tightly with the tapered unlocking bolt groove 13. After tightening, continue to turn the tapered unlocking bolt groove 13, and the tapered thread 3-1 on the tapered tenon 3 can be gradually loosened. After loosening, pull the tapered tenon 3 upward so that it is pulled up to the upper column 9, and unlocking can be quickly achieved.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building, characterized in that: It includes a lower corner piece (1), a connecting plate (2), a tapered tenon (3), a rotary catch (4), a spring (5), a rib plate (6), a rotating shaft (7), an upper corner piece (8), an upper column (9), a lower column (10) and an unlocking member; The lower corner piece (1) is connected to the lower column (10), the connecting plate (2) is placed on the lower corner piece (1), and a connecting hole (2-1) is provided in the middle of the connecting plate (2). The tapered tenon (3) passes through the connecting hole (2-1) and is fixed to the lower corner piece (1). The upper corner piece (8) is connected to the bottom of the upper column (9), and the bottom of the upper corner piece (8) is in contact with the connecting plate (2); On the inner four sides of the upper corner piece (8), a pair of parallelly distributed rib plates (6) are respectively provided. The rotary catches (4) are respectively arranged between each pair of rib plates (6). At least two springs (5) connected to the inner wall of the upper corner piece (8) are provided on the back of each rotary catch (4). A rotating shaft (7) is provided on each pair of rib plates (6), and the rotary catch (4) is connected to the rotating shaft (7); The tapered tenon (3) is connected to the rotary catch (4) through the contact surface; A connecting member is provided at the top of the tapered tenon (3), and the unlocking member is fixed to the connecting member to achieve unlocking; The unlocking member includes an unlocking rod (11), and the unlocking rod (11) includes an unlocking rod handle (11-2) and an unlocking tapered thread head (11-1) provided at the bottom of the unlocking rod handle (11-2); The connecting member includes a groove (12) opened at the top of the tapered tenon (3). A tapered unlocking bolt groove (13) matching the unlocking tapered thread head (11-1) is fitted and connected to the inner wall of the top of the groove (12). The bottom of the tapered unlocking bolt groove (13) is connected to an electric telescopic rod (14) provided in the groove (12). A slide rail (31) is vertically provided in the groove (12), and a slide rod (30) connected to the tapered unlocking bolt groove (13) is slidably connected to the top of the slide rail (31). Guide rods (15) are provided on both inner walls of the groove (12), and a blocking rod (16) is slidably sleeved on the guide rods (15). The bottom of the blocking rod (16) is meshed and connected with a transmission gear (18). The transmission gear (18) is provided on a transmission shaft (17) connected to the groove (12). Tooth plates (19) are provided on both sides of the tapered unlocking bolt groove (13). Driving gears (20) are meshed and connected to the mutually remote sides of the two tooth plates (19). The driving gears (20) are provided on a driving shaft (21) connected to the groove (12). A driving belt pulley (22) is provided on the driving shaft (21), a transmission double-groove belt pulley (23) is provided on the transmission shaft (17), and a driving belt (24) is provided between the driving belt pulley (22) and the transmission double-groove belt pulley (23).

2. The high-fault-tolerant self-locking and quick-unlocking connection node of a steel structure modular building according to claim 1, wherein: A tapered threaded hole (1-1) is provided in the middle of the lower corner piece (1).

3. A highly fault-tolerant self-locking and quickly unlocking connection node for a steel structure modular building according to claim 2, characterized in that: The bottom of the tapered tenon (3) is provided with a tapered thread (3-1) connected to the tapered threaded hole (1-1). The tapered tenon (3) is provided with a first-layer tenon (3-4) and a second-layer tenon (3-3). The tops of the first-layer tenon (3-4) and the second-layer tenon (3-3) are both provided with upper tenon inclined surfaces (3-5), and the bottoms of the first-layer tenon (3-4) and the second-layer tenon (3-3) are both provided with lower tenon inclined surfaces (3-6).

4. A highly fault-tolerant self-locking and quickly unlocking connection node for a steel structure modular building according to claim 3, characterized in that: The rotating catch (4) is provided with a first-layer catch (4-1) and a second-layer catch (4-2). The tops of the first-layer catch (4-1) and the second-layer catch (4-2) are both provided with upper catch inclined surfaces (4-3), and the bottoms of the first-layer catch (4-1) and the second-layer catch (4-2) are both provided with lower catch inclined surfaces (4-4). The rotating catch (4) is provided with a catch rotating shaft hole (4-5) connected to the rotating shaft (7). Among them, the lower tenon inclined surface (3-6) of the first-layer tenon (3-4) is in contact with the upper catch inclined surface (4-3) of the first-layer catch (4-1), the upper tenon inclined surface (3-5) of the second-layer tenon (3-3) is in contact with the lower catch inclined surface (4-4) of the first-layer catch (4-1), and the lower tenon inclined surface (3-6) of the second-layer tenon (3-3) is in contact with the upper catch inclined surface (4-3) of the second-layer catch (4-2).

5. A high fault-tolerant self-locking and quick-unlocking connection node for a steel structure modular building according to claim 4, characterized in that: The top of the upper corner piece (8) is provided with an upper hole (8-1), and the bottom of the upper corner piece (8) is provided with a lower hole (8-2).

6. The high-fault-tolerant self-locking and quick-unlocking connection node of a steel structure modular building according to claim 5, characterized in that: Anti-rotation rods (25) penetrate horizontally on both sides of the upper tenon inclined surface (3-5) at the top of the first-layer tenon (3-4). The top of the anti-rotation rod (25) is meshed and connected with a driven gear (26). The driven gear (26) is arranged on a driven shaft (27) connected to the groove (12). The driven shaft (27) is provided with a driven pulley (28). A driven belt (29) is arranged between the driven pulley (28) and the transmission double-groove pulley (23).

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