A fabricated steel structure for civil engineering

Abstract

The application discloses a kind of civil engineering with fabricated steel structure, it is related to civil engineering construction technology field.The connecting piece and steel beam piece are included, the connecting piece is opened with connecting socket, the steel beam piece is fixedly installed with connecting plug rod, the connecting piece and steel beam piece are provided with positioning assembly, the positioning assembly is provided with main plug rod and vice plug rod, the steel beam piece is opened with main insertion hole, the connecting piece and connecting plug rod are opened with vice insertion hole;The connecting piece is provided with auxiliary assembly, the auxiliary assembly is provided with auxiliary plug rod, the connecting plug rod is opened with auxiliary insertion hole, the connecting plug rod is opened with auxiliary groove.The application is cooperated with the use of positioning assembly and auxiliary assembly, effectively enhance the connection firmness between steel beam piece and connecting piece, improve shear resistance, vibration resistance and tension resistance capacity simultaneously, can also be conveniently disassembled, greatly improve the use effect of the fabricated steel structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of civil engineering construction technology, in particular to a prefabricated steel structure for civil engineering. BACKGROUND

[0002] Steel structure is a natural prefabricated structure, but not all steel structure buildings are prefabricated buildings. The prefabricated structure must be harmonious and unified in steel structure, enclosure system, equipment and pipeline system, and interior system, so as to be a prefabricated steel structure building.

[0003] In the prior art, a prefabricated steel structure building structure for civil engineering is disclosed in Chinese patent No. "CN220377510U". A connecting sleeve with a rubber sleeve is arranged outside two steel beam parts, a threaded sleeve is hinged between the two connecting sleeves, and a two-way screw rod with a knob is shared between the threaded sleeves. By rotating the two-way screw rod, the threaded sleeves can move towards each other, so that the connecting sleeve slides a certain distance outside the steel beam part until the two-way screw rod cannot rotate. In this way, the two steel beam parts form a triangle through the connecting part and the threaded sleeve and the two-way screw rod, thereby increasing the stability between the two steel beam parts and solving the problem of insufficient stability between the existing prefabricated steel structures.

[0004] In the existing prefabricated steel structure, the connection between the steel beam part and the connecting part usually relies on a single locking mechanism or fixing method, which is easily affected by external forces (such as shear force, pulling force, vibration, etc.), resulting in insufficient connection firmness. In addition, some prefabricated steel structures have a relatively complicated disassembly process for the connecting structure, especially in scenarios requiring quick disassembly, which usually requires the use of complex tools or takes a long time. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a prefabricated steel structure for civil engineering, which solves the problems mentioned in the background art.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme:

[0007] A prefabricated steel structure for civil engineering, comprising a connecting part and a steel beam part, a connecting socket is formed on the connecting part, a connecting plug rod is fixedly installed on the steel beam part, a positioning assembly is arranged on the connecting part and the steel beam part, a main plug rod and a secondary plug rod are arranged on the positioning assembly, a main plug hole is formed on the steel beam part, and a secondary plug hole is formed on the connecting part and the connecting plug rod.

[0008] An auxiliary assembly is arranged on the connecting part, an auxiliary plug rod is arranged on the auxiliary assembly, an auxiliary plug hole is formed on the connecting plug rod, and an auxiliary slot is formed on the connecting plug rod.

[0009] Preferably, the positioning assembly comprises a rotatingly mounted adjusting swivel ring on the connecting piece, an adjusting screw movably mounted on the adjusting swivel ring, a bearing fixedly mounted on one end of the adjusting screw, an adjusting block fixedly mounted on the bearing, a mounting block fixedly mounted on the adjusting block, a connecting frame rod fixedly mounted on the side end face of the mounting block, a fitting plate fixedly mounted on the end of the connecting frame rod away from the mounting block, and a positioning slide rod fixedly mounted on the adjusting block.

[0010] Preferably, one end of the adjusting screw extends to the inner side of the connecting piece, the other end of the adjusting screw extends to the other side of the connecting piece, the main insertion rod and the auxiliary insertion rod are both fixedly mounted on the fitting plate, the main insertion rod is inlaid with the main insertion hole, the auxiliary insertion rod is inlaid with the auxiliary insertion hole, the end of the positioning slide rod away from the adjusting block extends to one side of the connecting piece, and the positioning slide rod is slidingly mounted on the connecting piece.

[0011] Preferably, the auxiliary assembly comprises a mounting rod fixedly mounted on the adjusting block, a pressing rod fixedly mounted on the mounting rod, a reset rod rotatably mounted on the connecting piece, a mounting ring fixedly mounted on the reset rod, and a torsion spring fixedly connected to the mounting ring.

[0012] Preferably, the interior of the connecting piece is provided with a reset slot, the end of the reset rod is fixedly provided with a V-shaped frame rod, the V-shaped frame rod is provided with a pressing slot, and the end of the V-shaped frame rod is fixedly provided with a U-shaped frame rod.

[0013] Preferably, the mounting ring is located inside the reset slot, the end of the torsion spring away from the mounting ring is fixedly connected inside the reset slot, the pressing slot is located directly below the pressing rod, the pressing rod is in sliding contact with the pressing slot, the auxiliary insertion rod is fixedly mounted on the U-shaped frame rod, and the auxiliary insertion rod is inlaid with the auxiliary slot through the auxiliary insertion hole.

[0014] Preferably, the side end face of the connecting piece is fixedly provided with an L-shaped frame rod, an arc-shaped plate is fixedly mounted on the L-shaped frame rod, an inclined arc slot is formed in the inner side face of the arc-shaped plate, an L-shaped plate is fixedly mounted on the V-shaped frame rod, and a sliding rod is slidingly mounted on the L-shaped plate.

[0015] Preferably, one end of the sliding rod is fixedly provided with a contact protrusion, the other end of the sliding rod is fixedly provided with a fastening block, a limiting ring is fixedly mounted on the sliding rod, and a spring is fixedly connected to the limiting ring.

[0016] Preferably, the two ends of the sliding rod are located at the two sides of the U-shaped frame rod, the position of the fastening block is located at the inner side of the L-shaped plate, the position of the contact protrusion is located at the inner side of the inclined arc groove, and the inner side of the inclined arc groove is an inclined surface, so that the fastening block moves to the inner side by the inclined surface in the inclined arc groove when the contact protrusion slides in the inclined arc groove.

[0017] The application provides a prefabricated steel structure for civil engineering.

[0018] 1、The connecting rod is inserted into the connecting socket of the connecting piece, and then the adjusting ring on the connecting piece is rotated, so that the adjusting block on the adjusting ring moves to the inner side of the connecting piece by the cooperation of the adjusting ring and the adjusting screw rod, the cooperation of the adjusting screw rod and the bearing, and the cooperation of the bearing and the adjusting block, the mounting block on the adjusting block drives the abutting plate on the connecting frame rod to move to the inner side of the connecting piece, the abutting plate is abutted on the connecting piece and the steel beam piece by the limiting sliding between the positioning sliding rod and the connecting piece, the main insertion rod on the abutting plate is inserted into the main insertion hole, the auxiliary insertion rod is inserted into the auxiliary insertion hole of the connecting rod through the auxiliary insertion hole of the connecting piece, the main insertion rod and the main insertion hole are cooperated, and the auxiliary insertion rod and the auxiliary insertion hole are cooperated, so that double locking is formed, the shear resistance is enhanced, the firmness between the steel beam piece and the connecting piece is effectively ensured, and the steel beam piece and the connecting piece are extremely convenient to disassemble.

[0019] 2、The adjusting block moves to drive the pressing rod to move synchronously, the V-shaped frame rod is rotated around the reset rod by the cooperation of the pressing rod and the reset slot on the V-shaped frame rod, the U-shaped frame rod on the U-shaped frame rod drives the auxiliary insertion rod to be embedded through the auxiliary insertion hole and the auxiliary slot, so that additional mechanical interlocking is formed, the anti-vibration and anti-pulling capacity between the connecting piece and the steel beam piece is significantly improved, and the firmness of the connecting piece and the steel beam piece is further improved, when the V-shaped frame rod is not pressed by the pressing rod, the V-shaped frame rod is restored to the original position by the reaction force of the torsion spring on the reset rod, and the auxiliary insertion rod on the U-shaped frame rod is separated from the auxiliary slot and the auxiliary insertion hole, so that the auxiliary locking is released, and the connecting piece and the steel beam piece are convenient to disassemble.

[0020] 3、When the U-shaped frame rod rotates synchronously with the V-shaped frame rod, the L-shaped plate on the V-shaped frame rod is located at the outer side of the abutting plate, the fastening block on the sliding rod moves to the inner side by the inclined surface in the inclined arc groove when the contact protrusion on the sliding rod slides in the inclined arc groove, and the fastening block on the sliding rod is abutted on the side end of the abutting plate by the extrusion of the inclined surface when the U-shaped frame rod rotates to the final position with the V-shaped frame rod, so that the firmness between the abutting plate and the connecting piece is enhanced by the additional lateral extrusion force, the embedding of the main insertion rod and the main insertion hole and the embedding of the auxiliary insertion rod and the auxiliary insertion hole are effectively enhanced, and the firmness between the connecting piece and the steel beam piece is further enhanced.

[0021] 4、The present application, by positioning assembly and auxiliary assembly, effectively enhances the connection firmness between steel beam and connecting piece, improves the shear resistance, vibration resistance and tension resistance, and facilitates disassembly, greatly improving the use effect of the assembled steel structure. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a sectional view of the present application;

[0024] Figure 3 is Figure 2 is an enlarged view of A in the middle;

[0025] Figure 4 is a schematic diagram of the structure of the connecting plug rod in the present application;

[0026] Figure 5 is a schematic diagram of the structure of the main and auxiliary insertion holes in the present application;

[0027] Figure 6 is a schematic diagram of part of the positioning assembly in the present application;

[0028] Figure 7 is a schematic diagram of the structure of the auxiliary assembly in the present application;

[0029] Figure 8 is a sectional view of the L-shaped plate in the present application.

[0030] In the figure: 1, connecting piece; 2, steel beam; 3, connecting socket; 4, connecting plug rod; 5, main plug rod; 6, auxiliary plug rod; 7, main insertion hole; 8, auxiliary insertion hole; 9, auxiliary plug rod; 10, auxiliary insertion hole; 11, auxiliary slot; 12, adjusting swivel; 13, adjusting screw; 14, bearing; 15, adjusting block; 16, mounting block; 17, connecting frame rod; 18, matching plate; 19, mounting rod; 20, pressing rod; 21, reset rod; 22, mounting ring; 23, torsional spring; 24, reset slot; 25, V-shaped frame rod; 26, pressing slot; 27, U-shaped frame rod; 28, L-shaped frame rod; 29, arc plate; 30, inclined arc slot; 31, L-shaped plate; 32, sliding rod; 33, contact block; 34, fastening block; 35, limiting ring; 36, spring; 37, positioning sliding rod. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the scope of the present application.

[0032] Please refer to Figures 1-8 The present application is a kind of civil engineering with assembled steel structure, including connecting piece 1 and steel beam piece 2, connecting piece 1 is provided with connecting socket 3, steel beam piece 2 is fixedly installed with connecting plug 4, connecting piece 1 and steel beam piece 2 are provided with positioning assembly, positioning assembly is provided with main plug 5 and auxiliary plug 6, steel beam piece 2 is provided with main insertion hole 7, connecting piece 1 and connecting plug 4 are provided with auxiliary insertion hole 8, connecting piece 1 is provided with auxiliary assembly, auxiliary assembly is provided with auxiliary plug 9, connecting plug 4 is provided with auxiliary insertion hole 10, connecting plug 4 is provided with auxiliary slot 11, positioning assembly includes adjusting ring 12 rotatably installed on connecting piece 1, adjusting screw 13 movably installed on adjusting ring 12, one end of adjusting screw 13 is fixedly installed with bearing 14, bearing 14 is fixedly installed with adjusting block 15, adjusting block 15 is fixedly installed with mounting block 16, the side end surface of mounting block 16 is fixedly installed with connecting frame rod 17, the end away from mounting block 16 of connecting frame rod 17 is fixedly installed with abutting plate 18, adjusting block 15 is fixedly installed with positioning slide rod 37, one end of adjusting screw 13 extends to the inner side of connecting piece 1, the other end of adjusting screw 13 extends to the other side of connecting piece 1, main plug 5 and auxiliary plug 6 are fixedly installed on abutting plate 18, main plug 5 is embedded in main insertion hole 7, auxiliary plug 6 is embedded in auxiliary insertion hole 8, one end away from adjusting block 15 of positioning slide rod 37 extends to one side of connecting piece 1, positioning slide rod 37 is slidingly installed with connecting piece 1, wherein the auxiliary insertion hole 8 on connecting piece 1 and the auxiliary insertion hole 8 on connecting plug 4 are in the same vertical direction, which ensures that the auxiliary plug 6 can be accurately inserted into the auxiliary insertion hole 8.

[0033] In this embodiment, the connecting rod 4 on the steel beam 2 is inserted into the connecting socket 3 of the connecting piece 1, and then the adjusting ring 12 on the connecting piece 1 is rotated, and the mounting block 16 on the adjusting block 15 drives the abutting plate 18 on the connecting frame rod 17 to move to the inner side of the connecting piece 1 through the cooperation of the adjusting ring 12 and the adjusting screw 13, the cooperation of the adjusting screw 13 and the bearing 14, and the cooperation of the bearing 14 and the adjusting block 15. Through the limiting sliding between the positioning slide rod 37 and the connecting piece 1, the abutting plate 18 will be attached to the connecting piece 1 and the steel beam 2, the main plug rod 5 on the abutting plate 18 will be inserted into the main plug hole 7, and the auxiliary plug rod 6 will pass through the auxiliary plug hole 8 on the connecting piece 1 and be inserted into the auxiliary plug hole 8 of the connecting rod 4. Through the cooperation of the main plug rod 5 and the main plug hole 7, and the cooperation of the auxiliary plug rod 6 and the auxiliary plug hole 8, a double locking is formed to enhance the shear resistance and effectively ensure the firmness between the steel beam 2 and the connecting piece 1, and also very convenient during disassembly.

[0034] The auxiliary assembly includes a mounting rod 19 fixedly installed on the adjusting block 15, a pressing rod 20 fixedly installed on the mounting rod 19, a reset rod 21 rotatably installed on the connecting piece 1, an installation ring 22 fixedly installed on the reset rod 21, a torsion spring 23 fixedly connected to the installation ring 22, a reset slot 24 formed in the connecting piece 1, a V-shaped frame rod 25 fixedly installed at the end of the reset rod 21, a pressing slot 26 formed in the V-shaped frame rod 25, a U-shaped frame rod 27 fixedly installed at the end of the V-shaped frame rod 25, the installation ring 22 being located inside the reset slot 24, the torsion spring 23 being fixedly connected to the inside of the reset slot 24 away from the installation ring 22, the pressing slot 26 being located directly below the pressing rod 20, the pressing rod 20 being in sliding contact with the pressing slot 26, the auxiliary plug rod 9 being fixedly installed on the U-shaped frame rod 27, the auxiliary plug rod 9 being inlaid through the auxiliary plug hole 10 and the auxiliary slot 11, wherein the auxiliary plug hole 10 and the auxiliary slot 11 are in the same direction, facilitating the auxiliary plug rod 9 to pass through the auxiliary plug hole 10 and enter the inside of the auxiliary slot 11, and the number of torsion springs 23 on the installation ring 22 is two, ensuring that the V-shaped frame rod 25 that rotates can return to the original position.

[0035] In this embodiment, when the adjusting block 15 moves, the lower pressing rod 20 moves synchronously, through the cooperation of the lower pressing rod 20 and the reset slot 24 on the V-shaped frame rod 25, the V-shaped frame rod 25 rotates around the reset rod 21, the U-shaped frame rod 27 on the U-shaped frame rod 27 drives the auxiliary plug rod 9 to pass through the auxiliary plug hole 10 and be embedded in the auxiliary slot 11, forming additional mechanical interlocking, significantly improving the anti-vibration and anti-pulling ability between the connecting piece 1 and the steel beam piece 2, and further improving the fastening of the connecting piece 1 and the steel beam piece 2, when the V-shaped frame rod 25 is not pressed by the lower pressing rod 20, the V-shaped frame rod 25 will return to the original position through the reaction force of the torsion spring 23 on the reset rod 21, at the same time, the auxiliary plug rod 9 on the U-shaped frame rod 27 will fall off from the auxiliary slot 11 and the auxiliary plug hole 10, and the auxiliary locking is released, so as to facilitate quick disassembly.

[0036] The side end surface of the connecting piece 1 is fixedly installed with an L-shaped frame rod 28, the L-shaped frame rod 28 is fixedly installed with an arc-shaped plate 29, the inner side surface of the arc-shaped plate 29 is provided with an inclined arc slot 30, the V-shaped frame rod 25 is fixedly installed with an L-shaped plate 31, the L-shaped plate 31 is slidably installed with a sliding rod 32, one end of the sliding rod 32 is fixedly installed with a contact protrusion 33, the other end of the sliding rod 32 is fixedly installed with a fastening block 34, the sliding rod 32 is fixedly installed with a limiting ring 35, the limiting ring 35 is fixedly connected with a spring 36, the two ends of the sliding rod 32 are located at the two sides of the U-shaped frame rod 27, the position of the fastening block 34 is located at the inner side of the L-shaped plate 31, the position of the contact protrusion 33 is located at the inside of the inclined arc slot 30, the inside of the inclined arc slot 30 is an inclined surface, when the contact protrusion 33 slides in the inclined arc slot 30, the fastening block 34 moves to the inner side by using the inclined surface in the inclined arc slot 30, wherein when the V-shaped frame rod 25 rotates, the L-shaped plate 31 moves to the outside of the abutting plate 18, providing movement space for the sliding rod 32, wherein the inclined surface in the inclined arc slot 30 is set following the shape of the inclined arc slot 30, ensuring that the sliding rod 32 moves to the inner side in the process of following the L-shaped plate 31.

[0037] In this embodiment, when the U-shaped frame rod 27 rotates synchronously with the V-shaped frame rod 25, the L-shaped plate 31 on the V-shaped frame rod 25 is located at the outside of the abutting plate 18, when the contact protrusion 33 on the sliding rod 32 slides in the inclined arc slot 30, the fastening block 34 on the sliding rod 32 moves to the inner side by using the inclined surface in the inclined arc slot 30, when the U-shaped frame rod 27 rotates to the final position with the V-shaped frame rod 25, the contact protrusion 33 on the sliding rod 32 extrudes the fastening block 34 on the sliding rod 32 to abut on the side end of the abutting plate 18 by using the inclined surface, using additional lateral extrusion force to enhance the firmness between the abutting plate 18 and the connecting piece 1, effectively enhancing the embedding of the main plug rod 5 and the main plug hole 7 and the embedding of the auxiliary plug rod 6 and the auxiliary plug hole 8, further enhancing the firmness between the connecting piece 1 and the steel beam piece 2.

[0038] Working principle: in use, the connecting rod 4 on the steel beam 2 is inserted into the connecting socket 3 of the connecting piece 1, then the adjusting ring 12 on the connecting piece 1 is turned, the adjusting ring 12 cooperates with the adjusting screw 13, the adjusting screw 13 cooperates with the bearing 14, and the bearing 14 cooperates with the adjusting block 15, the mounting block 16 on the adjusting block 15 drives the abutting plate 18 on the connecting frame rod 17 to move to the inner side of the connecting piece 1, then the abutting plate 18 is limited to slide between the positioning slide rod 37 and the connecting piece 1, and the abutting plate 18 is abutted on the connecting piece 1 and the steel beam 2, the main rod 5 on the abutting plate 18 is inserted into the main hole 7, the auxiliary rod 6 is inserted into the auxiliary hole 8 of the connecting rod 4 through the auxiliary hole 8 of the connecting piece 1, the main rod 5 cooperates with the main hole 7, and the auxiliary rod 6 cooperates with the auxiliary hole 8, so that double locking is formed, the shear resistance is enhanced, the firmness between the steel beam 2 and the connecting piece 1 is effectively ensured, and the disassembly is also very convenient, when the adjusting block 15 moves, the lower pressing rod 20 moves synchronously, the V-shaped frame rod 25 rotates around the reset rod 21 through the cooperation of the lower pressing rod 20 and the reset slot 24 on the V-shaped frame rod 25, the U-shaped frame rod 27 on the U-shaped frame rod 27 drives the auxiliary rod 9 to inlay through the auxiliary hole 10 and the auxiliary slot 11, so that additional mechanical interlocking is formed, the anti-vibration and anti-pulling ability between the connecting piece 1 and the steel beam 2 is significantly improved, and the fastening of the connecting piece 1 and the steel beam 2 is further improved, when the V-shaped frame rod 25 is not pressed by the lower pressing rod 20, the V-shaped frame rod 25 restores to the original position through the reaction force of the torsion spring 23 on the reset rod 21, and the auxiliary rod 9 on the U-shaped frame rod 27 falls off from the auxiliary slot 11 and the auxiliary hole 10, so that the auxiliary locking is released, thereby facilitating rapid disassembly, when the U-shaped frame rod 27 rotates synchronously with the V-shaped frame rod 25, the L-shaped plate 31 on the V-shaped frame rod 25 is located outside the abutting plate 18, when the contact protrusion 33 on the sliding rod 32 slides in the inclined arc slot 30, the inclined surface in the inclined arc slot 30 moves the fastening block 34 on the sliding rod 32 to the inner side, when the U-shaped frame rod 27 rotates to the final position with the V-shaped frame rod 25, the contact protrusion 33 on the sliding rod 32 is extruded by the inclined surface, so that the fastening block 34 on the sliding rod 32 is abutted on the side end of the abutting plate 18, the additional lateral extrusion force enhances the firmness between the abutting plate 18 and the connecting piece 1, effectively enhances the inlay of the main rod 5 and the main hole 7 and the inlay of the auxiliary rod 6 and the auxiliary hole 8, and further enhances the firmness between the connecting piece 1 and the steel beam 2.

[0039] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited to the appended claims. It must be noted that, as used in the specification and the appended claims, the singular form "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a plurality of components. Similarly, the words "comprise," "comprises," and "comprising," as well as the words "include," "includes," and "including," when used in this specification and in the following claims, are intended to specify the presence of stated features, regions, integers, steps, operations, elements, or components, but they do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, or groups thereof. Furthermore, these terms do not necessarily denote the presence of anything that can be claimed as new. The meaning of "a," "an," and "the" also includes plural references and plural forms, for example, "a" or "an" entity includes one or more entities.

[0040] While the embodiments of the application have been shown and described herein, it is understood that modifications, substitutions, changes, and alterations can be made by those skilled in the art without departing from the spirit and scope of the present application.

Claims

1. A prefabricated steel structure for civil engineering comprising a connecting piece (1) and a steel beam piece (2), characterized in that: The connecting piece (1) is provided with a connecting socket (3), the steel beam piece (2) is fixedly provided with a connecting plug rod (4), the connecting piece (1) and the steel beam piece (2) are provided with a positioning assembly, the positioning assembly is provided with a main plug rod (5) and a vice plug rod (6), the steel beam piece (2) is provided with a main plug hole (7), the connecting piece (1) and the connecting plug rod (4) are provided with a vice plug hole (8), the positioning assembly comprises an adjusting swivel ring (12) rotatably installed on the connecting piece (1), an adjusting screw rod (13) movably installed on the adjusting swivel ring (12), a bearing (14) fixedly installed on one end of the adjusting screw rod (13), an adjusting block (15) fixedly installed on the bearing (14), an installation block (16) fixedly installed on the adjusting block (15), a connecting frame rod (17) fixedly installed on the side end face of the installation block (16), and a close plate (18) fixedly installed on the end, away from the installation block (16), of the connecting frame rod (17). The connecting piece (1) is provided with an auxiliary assembly, the auxiliary assembly is provided with an auxiliary plug rod (9), the connecting plug rod (4) is provided with an auxiliary plug hole (10), the connecting plug rod (4) is provided with an auxiliary groove (11), and the auxiliary assembly comprises an installation rod (19) fixedly installed on the adjusting block (15), a pressing rod (20) fixedly installed on the installation rod (19), a reset rod (21) rotatably installed on the connecting piece (1), an installation ring (22) fixedly installed on the reset rod (21), a torsional spring (23) fixedly connected to the installation ring (22), a reset groove (24) formed in the connecting piece (1), a V-shaped frame rod (25) fixedly installed on the end of the reset rod (21), a pressing groove (26) formed in the V-shaped frame rod (25), a U-shaped frame rod (27) fixedly installed on the end of the V-shaped frame rod (25), an L-shaped frame rod (28) fixedly installed on the side end face of the connecting piece (1), an arc-shaped plate (29) fixedly installed on the L-shaped frame rod (28), an inclined arc groove (30) formed in the inner side face of the arc-shaped plate (29), an L-shaped plate (31) fixedly installed on the V-shaped frame rod (25), a sliding rod (32) slidably installed on the L-shaped plate (31), a contact protruding block (33) fixedly installed on one end of the sliding rod (32), a fastening block (34) fixedly installed on the other end of the sliding rod (32), a limiting ring (35) fixedly installed on the sliding rod (32), and a spring (36) fixedly connected to the limiting ring (35).

2. A prefabricated steel structure for civil engineering according to claim 1, characterized in that: One end of the adjusting screw rod (13) extends to the inner side of the connecting piece (1), the other end of the adjusting screw rod (13) extends to the other side of the connecting piece (1), the main insertion rod (5) and the auxiliary insertion rod (6) are fixedly installed on the fitting plate (18), the main insertion rod (5) is inlaid with the main insertion hole (7), the auxiliary insertion rod (6) is inlaid with the auxiliary insertion hole (8), one end of the positioning slide rod (37) away from the adjusting block (15) extends to one side of the connecting piece (1), and the positioning slide rod (37) is slidably installed on the connecting piece (1).

3. A prefabricated steel structure for civil engineering according to claim 1, characterized in that: The position of the mounting ring (22) is inside the reset slot (24), one end of the torsion spring (23) away from the mounting ring (22) is fixedly connected inside the reset slot (24), the position of the pressing groove (26) is directly below the pressing rod (20), the pressing rod (20) is in sliding contact with the pressing groove (26), the auxiliary insertion rod (9) is fixedly installed on the U-shaped frame rod (27), and the auxiliary insertion rod (9) is inlaid with the auxiliary slot (11) through the auxiliary insertion hole (10).

4. A prefabricated steel structure for civil engineering according to claim 1, characterized in that: Both ends of the sliding rod (32) are located on both sides of the U-shaped frame rod (27), the position of the fastening block (34) is inside the L-shaped plate (31), the position of the contact protrusion (33) is inside the inclined arc slot (30), the inside of the inclined arc slot (30) is an inclined surface, when the contact protrusion (33) slides in the inclined arc slot (30), the fastening block (34) moves inwardly by utilizing the inclined surface in the inclined arc slot (30).

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