A main frame structure of an assembled building

Abstract

The invention discloses an assembled building main frame structure, which solves the problem of splicing frame beams and columns in large-scale assembly, ensures connection quality, and improves assembly efficiency. The technical scheme adopted is: an assembled building main frame structure, a cross-shaped node structure is located at the center of a field, an L-shaped node structure is located at the four corners of the field, and a T-shaped node structure is located in the middle of the side of the field. A cross beam is connected between the L-shaped node structure and the T-shaped node structure, and between the T-shaped node structure and the cross-shaped node structure; columns are both mounted on the upper and lower ends of a columnar frame, and the columns are limited by a support platform. A column connection node is arranged on the upper part of the column, and the column connection node includes a mother node, a child node, a plurality of F-shaped buckles and a plurality of inclined wedges. The mother node and the child node are embedded and locked as a whole by a plurality of F-shaped buckles and a plurality of inclined wedges, and the outer end faces of the mother node and the child node are fixedly connected to the beam or column to be connected.

Description

Technical Field

[0001] The invention discloses an assembled building main frame structure, belonging to the technical field of steel structure connection. Background Art

[0002] Buildings assembled on site from prefabricated components are called prefabricated buildings. With the continuous progress and development of modern industrialization, prefabricated buildings have been promoted and applied. At present, prefabricated buildings are facing the following problems:

[0003] 1. Beam-column splicing problem;

[0004] The beam-column connection is a weak component to ensure a strong node. The existing node size is large, which has a great impact on subsequent decoration.

[0005] 2. Column splicing problem;

[0006] At present, the columns are spliced ​​on site by bolt connection. There are many bolts, the installation is cumbersome and labor-intensive, and the positioning requirements are high. The beams and columns are welded on site, and the quality of the welds at high altitude is difficult to guarantee, which requires a lot of work for the personnel.

[0007] 3. Connection problems between plates and beams;

[0008] At present, steel structures of beams and slabs are mainly connected with studs and floor slabs. The studs need to be welded on site or in the factory. The pouring of floor slabs and the bundling of steel bars require on-site construction, which is labor-intensive, costly and has a long construction period.

[0009] 4. Connection problems of wall panels;

[0010] The existing wall panels use small strips, which have the characteristics of large workload of grouting, poor installation flatness, easy cracking at the joints in the later stage, and long installation period.

[0011] 5. Assembly method issues;

[0012] The existing assembly methods on the market also lead to a large workload for the entire installation, a long installation period, and uneven construction quality. Summary of the invention

[0013] The present invention overcomes the shortcomings of the prior art, provides a prefabricated building main frame structure, solves the problem of splicing frame beams and columns in large-scale assembly, ensures connection quality, and improves assembly efficiency.

[0014] In order to solve the above technical problems, the technical solution adopted by the present invention is: an assembled building main frame structure, including a cross beam, an L-shaped node structure, a T-shaped node structure, a cross-shaped node structure, a column and a column connecting node, the cross beam, the L-shaped node structure, the T-shaped node structure and the cross-shaped node structure constitute a main beam unit in the shape of a field, the cross-shaped node structure is located at the center of the field, the L-shaped node structure is located at the four corners of the field, the T-shaped node structure is located in the middle of the side of the field, and the L-shaped node structure and the T-shaped node structure, the T-shaped node structure and the cross-shaped node structure are all connected with a cross beam; the L-shaped node structure, the T-shaped node structure and the cross-shaped node structure all include a square column frame and A connecting seat, wherein the two connecting seats of the L-shaped node structure are arranged on two adjacent side walls of the cylindrical frame, the three connecting seats of the T-shaped node structure are arranged in sequence on three adjacent side walls of the cylindrical frame, and the four connecting seats of the cross-shaped node structure are respectively arranged on the four side walls of the cylindrical frame, the connecting seat is in a stepped shape distributed downward, and the connecting seat is a frame-shaped structure, and a connecting hole for connecting and fixing with a crossbeam is arranged on the connecting seat, the connecting seat is a frame-shaped structure with an opening on one side, and the open side of the frame-shaped structure is used to screw the connecting bolts on the connecting surface, and two support platforms are annularly arranged on the side wall of the cylindrical frame, the two support platforms are distributed up and down, and the two support platforms are respectively aligned with the upper and lower ends of the connecting seat;

[0015] The upper and lower ends of the columnar frame are both equipped with columns, and the columns are limited by the support platform. Column connection nodes are occasionally arranged on the upper part of the columns, and the column connection nodes include a mother node, a child node, a plurality of F-type clips and a plurality of inclined wedges. The mother node and the child node are embedded and locked as a whole by a plurality of F-type clips and a plurality of inclined wedges, and the outer end faces of the mother node and the child node are fixedly connected to the beam or column to be connected.

[0016] A circular hole-shaped recess is provided at the upper end of the mother node, a plurality of mother node circular holes are provided on the upper end side wall, and a mother node groove is provided on the inner side of the mother node; a cylindrical boss is provided at the lower end of the child node, a plurality of child node U-shaped grooves are provided at the bottom of the cylindrical boss, and a child node groove is provided on the inner side of the child node; buckle bosses are provided at the upper and lower ends of the F-type buckle; oblique wedge bosses are provided at both ends of the inclined wedge, and an oblique wedge bolt hole is provided in the middle; the circular hole-shaped recess of the mother node is clamped with the cylindrical boss of the child node, the F-type buckle and the oblique wedge are arranged alternately, and the buckle bosses and oblique wedge bosses at the upper and lower ends are respectively clamped with the mother node groove and the child node groove, and the mother node, child node and oblique wedge are fixedly connected by bolts passing through the mother node circular hole, the child node U-shaped groove and the oblique wedge bolt hole.

[0017] The parent node and the child node are directly welded to the two beams or columns to be connected or are welded together through other connecting parts.

[0018] A snap bolt hole is provided in the middle of the F-type snap buckle, and the mother node, child node and F-type snap buckle are fixedly connected by a bolt passing through the mother node circular hole, the child node U-shaped groove and the snap bolt hole.

[0019] The bolt 1 is a hexagon socket head bolt.

[0020] The second bolt is an external hexagonal bolt.

[0021] The crossbeam is a frame structure with an opening on one side, and end connection seats are provided at both ends of the crossbeam. The end connection seats are in the shape of an inverted step, and the end connection seats are matched and connected with the connecting seats. The end connection seats are a frame-shaped structure, and a connecting through hole for connecting and fixing with the connecting seats is provided on the end connection seats. The end connection seats are a frame-shaped structure with an opening on one side, and the open side of the frame-shaped structure is used for screwing the connecting bolts on the connecting surface.

[0022] The step-shaped structures of the connecting seat and the end connecting seat have at least two layers, which are used for matching, supporting and fixing each other.

[0023] The columnar frame, the connecting seat and the supporting platform are either integrally formed or fixed by welding, and the end connecting seat and the crossbeam are integrally formed.

[0024] A reinforcing rib plate for reinforcing the structure is arranged in the frame structure of the end connection seat.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the present invention utilizes the end of the crossbeam to match and support the connecting seats on each node structure to form a main beam structural unit; the upper and lower ends of the columnar frame of the node structure are used to plug in the corresponding columns; the stepped structure connection is more precise and firm, which provides a solution to the problem of splicing frame beams and columns in large-scale assembly, ensures the connection quality, and improves assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a three-dimensional schematic diagram of the main beam unit in the present invention.

[0029] Figure 3 It is a three-dimensional schematic diagram of the crossbeam in the present invention.

[0030] Figure 4 It is a three-dimensional schematic diagram of the L-shaped node structure in the present invention.

[0031] Figure 5 It is a three-dimensional schematic diagram of the T-shaped node structure in the present invention.

[0032] Figure 6 It is a three-dimensional schematic diagram of the cross-shaped node structure in the present invention.

[0033] Figure 7 It is a schematic diagram of the split structure of the column connection node in the present invention.

[0034] Figure 8 It is a schematic diagram of the cross-sectional structure of the column connection node in the present invention.

[0035] Fig. 9 It is a schematic diagram of the top view of the structure of the column connection node in the present invention.

[0036] Fig.10 It is a schematic diagram of the top cross-sectional structure of the column connection node in the present invention.

[0037] Fig.11 It is a schematic diagram of the split cross-sectional structure of the column connection node in the present invention.

[0038] Fig.12 It is a schematic diagram of the structure of the F-shaped buckle of the column connection node in the present invention.

[0039] Fig.13 It is a schematic diagram of the structure of the inclined wedge of the column connection node in the present invention.

[0040] In the figure: 1 is a beam, 11 is a cylindrical frame, 12 is a connecting seat, 13 is a connecting hole, 14 is a supporting platform, 2 is an L-shaped node structure, 21 is an end connecting seat, 23 is a connecting through hole, 24 is a reinforcing rib, 3 is a T-shaped node structure, 4 is a cross-shaped node structure, 5 is a column, 6 is a column connecting node, 61 is a mother node, 6101 is a circular hole-shaped concave platform, 6102 is a mother node circular hole, 6103 is a mother node groove, 62 is an F-type buckle, 6201 is a buckle boss, 6202 is a buckle bolt hole, 63 is a child node, 6301 is a cylindrical boss, 6302 is a child node U-shaped groove, 6303 is a child node groove, 64 is bolt one, 65 is an inclined wedge, 6501 is an inclined wedge boss, 6502 is an inclined wedge bolt hole, and 66 is bolt two. DETAILED DESCRIPTION

[0041] like Figures 1 to 13As shown, the present invention is an assembled building main frame structure, including a cross beam 1, an L-shaped node structure 2, a T-shaped node structure 3, a cross-shaped node structure 4, a column 5 and a column connection node 6, wherein the cross beam 1, the L-shaped node structure 2, the T-shaped node structure 3 and the cross-shaped node structure 4 constitute a main beam unit in the shape of a field, the cross-shaped node structure 4 is located at the center of the field, the L-shaped node structure 2 is located at the four corners of the field, the T-shaped node structure 3 is located in the middle of the side of the field, and the L-shaped node structure 2 and the T-shaped node structure 3, and the T-shaped node structure 3 and the cross-shaped node structure 4 are all connected with a cross beam 1; the L-shaped node structure 2, the T-shaped node structure 3 and the cross-shaped node structure 4 all include a square columnar frame 11 and a connecting seat 12, wherein the L-shaped node structure The two connecting seats 12 of the structure 2 are arranged on two adjacent side walls of the cylindrical frame 11, the three connecting seats 12 of the T-shaped node structure 3 are arranged on the three adjacent side walls of the cylindrical frame 11 in sequence, and the four connecting seats 12 of the cross-shaped node structure 4 are respectively arranged on the four side walls of the cylindrical frame 11, the connecting seats 12 are in a stepped shape distributed downward, and the connecting seats 12 are frame-shaped structures, and the connecting seats 12 are provided with connecting holes 13 for connecting and fixing with the cross beam 1, the connecting seats 12 are frame-shaped structures with one side open, and the open side of the frame-shaped structure is used to screw the connecting bolts on the connecting surface, and two support platforms 14 are annularly arranged on the side walls of the cylindrical frame 11, and the two support platforms 14 are distributed up and down, and the two support platforms 14 are respectively aligned with the upper and lower ends of the connecting seats 12;

[0042] The upper and lower ends of the columnar frame 11 are both equipped with columns 5, and the columns 5 are limited by the support platform 14. The columns 5 are occasionally provided with column connection nodes 6, and the column connection nodes 6 include a mother node 61, a child node 63, a plurality of F-type buckles 62 and a plurality of inclined wedges 65. The mother node 61 and the child node 63 are embedded and locked as a whole through a plurality of F-type buckles 62 and a plurality of inclined wedges 65, and the outer end surfaces of the mother node 61 and the child node 63 are fixedly connected to the beam or column to be connected.

[0043] The upper end of the mother node 61 is provided with a circular hole-shaped recess 6101, and the upper side wall is provided with a plurality of mother node circular holes 6102, and the inner side of the mother node 61 is provided with a mother node groove 6103; the lower end of the child node 63 is provided with a cylindrical boss 6301, and the bottom of the cylindrical boss 6301 is provided with a plurality of child node U-shaped grooves 6302, and the inner side of the child node 63 is provided with a child node groove 6303; the upper and lower ends of the F-type buckle 62 are provided with buckle bosses 6201; the two ends of the inclined wedge 65 are provided with inclined wedge bosses 6501, and the middle part is provided with a Angle wedge bolt hole 6502; the circular hole-shaped recess 6101 of the mother node 61 is snap-fitted with the cylindrical boss 6301 of the child node 63, the F-shaped buckle 62 and the angled wedge 65 are arranged alternately, and the buckle boss 6201 and the angled wedge boss 6501 at the upper and lower ends are snap-fitted with the mother node groove 6103 and the child node groove 6303 respectively, the mother node 61, the child node 63 and the angled wedge 65 are fixedly connected by bolt 2 66 passing through the mother node circular hole 6102, the child node U-shaped groove 6302, and the angled wedge bolt hole 6502.

[0044] The parent node 61 and the child node 63 are directly welded to the two beams or columns to be connected or are welded together through other connecting components.

[0045] A snap bolt hole 6202 is provided in the middle of the F-type snap buckle 62, and the parent node 61, the child node 63 and the F-type snap buckle 62 are fixedly connected by a bolt 64 passing through the parent node circular hole 6102, the child node U-shaped groove 6302 and the snap bolt hole 6202.

[0046] The bolt 64 is a hexagon socket head bolt.

[0047] The second bolt 66 is an external hexagonal bolt.

[0048] The crossbeam 1 is a frame structure with one side open, and end connection seats 21 are provided at both ends of the crossbeam 1. The end connection seats 21 are in the shape of an inverted step, and the end connection seats 21 are matched and connected with the connection seat 12. The end connection seat 21 is a frame-shaped structure, and a connecting through hole 23 for connecting and fixing with the connection seat 12 is provided on the end connection seat 21. The end connection seat 21 is a frame-shaped structure with one side open, and the open side of the frame-shaped structure is used to screw the connecting bolts on the connecting surface.

[0049] The step-shaped structures of the connection base 12 and the end connection base 21 have at least two layers, which are used for matching, supporting and fixing each other.

[0050] The columnar frame 11, the connecting seat 12 and the supporting platform 14 are either integrally formed or fixed by welding, and the end connecting seat 21 and the crossbeam 1 are integrally formed.

[0051] The frame structure of the terminal connection seat 21 is provided with reinforcing ribs 24 for reinforcing the structure.

[0052] The present invention utilizes the end of the crossbeam to match and support the connecting seats on each node structure to form a main beam structural unit. The upper and lower ends of the columnar frame of the node structure are used to plug in the corresponding columns. The stepped structure connection is more precise and firm, which provides a solution to the problem of splicing frame beams and columns in large-scale assembly, ensures the connection quality, and improves assembly efficiency.

[0053] In the present invention, the parent node 61 and the child node 63 are locked and connected as a whole through multiple F-type buckles 62 and multiple inclined wedges 65 embedded in the parent node 61 and the child node 63. In this embodiment, four F-type buckles 62 and four inclined wedges 65 can be set. The F-type buckle 62 clamps the parent node 61 and the child node 63 into a whole. An inclined wedge 65 is set between every two F-type buckles 62 to fasten the parent node 61, the child node 63 and the F-type buckle 62 into a whole. When it is necessary to connect two beams or columns, it is only necessary to place the connection positioning node of this embodiment between the beams or columns, and fix the lower end surface of the parent node 61 and the upper end surface of the child node 63 to the beam or column to be connected.

[0054] In the present invention, a circular hole-shaped recess 6101 is provided at the upper end of the mother node 61, a plurality of mother node circular holes 6102 are provided on the upper end side wall, and a mother node groove 6103 is provided on the inner side of the mother node 61; a cylindrical boss 6301 is provided at the lower end of the child node 63, a plurality of child node U-shaped grooves 6302 are provided at the bottom of the cylindrical boss 6301, and a child node groove 6303 is provided on the inner side of the child node 63. A buckle boss 6201 is provided at the upper and lower ends of the F-type buckle 62, and a buckle bolt hole 6202 is provided in the middle. An inclined wedge boss 6501 is provided at both ends of the inclined wedge 65, and an inclined wedge bolt hole 6502 is provided in the middle. The circular hole-shaped recess 6101 of the mother node 61 is snapped with the cylindrical boss 6301 of the child node 63, so that the mother node and the child node are matched and positioned. The F-type buckle 62 and the inclined wedge 65 are arranged alternately, and the buckle boss 6201 and the inclined wedge boss 6501 at the upper and lower ends thereof are respectively engaged with the mother node groove 6103 and the child node groove 6303, and the mother node 61, the child node 63 and the inclined wedge 65 are fixedly connected by bolt 2 66 passing through the mother node circular hole 6102, the child node U-shaped groove 6302 and the inclined wedge bolt hole 6502; the mother node 61, the child node 63 and the F-type buckle 62 are fixedly connected by bolt 1 64 passing through the mother node circular hole 6102, the child node U-shaped groove 6302 and the buckle bolt hole 6202. The above-mentioned structural setting enables the mother node and the child node to be connected by an inclined wedge and an F-type post-locking connection, and the mother node circular hole 6102 and the child node U-shaped groove 6302 of the side wall are combined with screws and bolt holes for positioning and locking, so that the mother node and the child node are firmly together.

[0055] Bolt 1 64 can be a hexagon socket head bolt, and bolt 2 66 can be a hexagon socket head bolt. When the beams or columns to be connected need to be assembled together, it is only necessary to install a node of this embodiment between the two beams or columns. The parent node 61 and the child node 63 can be directly welded to the two beams or columns to be connected, or the parent node 61 and the child node 63 can be welded to plates or other connecting parts respectively according to the different cross-sections of the beams or columns, and then welded to the beams or columns.

[0056] The specific installation and implementation of the components of the steel structure quick connection positioning node in this embodiment are as follows:

[0057] 1. Insert the buckle boss 6201 into the mother node groove 6103 and place the F-type buckle 62 into the mother node 61 respectively;

[0058] 2. Use a hexagon socket head bolt to pass through the female node circular hole 6102 on the side of the female node 61 and screw it into the buckle bolt hole 6202 of the F-type buckle 62. Be careful not to tighten it;

[0059] 3. Insert the inclined wedge 65 into the mother node 61 by inserting the inclined wedge boss 6501 into the mother node groove 6103;

[0060] 4. Use an external hexagonal bolt to pass through the circular hole 6102 on the side of the female node 61 and screw it into the wedge bolt hole 6502 of the wedge 65. Be careful not to tighten it;

[0061] 5. Through the positioning and clamping of the circular hole-shaped concave platform 6101 of the mother node and the cylindrical boss of the child node, the child node 63 is placed into the mother node 61, so that the U-shaped groove of the child node is clamped on the external hexagonal bolt and the internal hexagonal cylindrical head bolt;

[0062] 6. Tighten the hexagon socket head bolts and the hexagon socket head bolts respectively, so that the parent node 61 and the child node 63 are fastened together by the F-type buckle 62 and the bevel wedge 65 in combination with the bolts;

[0063] 7. During construction, when the beam or column to be connected needs to be installed and assembled, it is only necessary to directly weld the upper end surface of the mother node 61 and the lower end surface of the child node 63 to the beam or column to be connected or to weld them to the beam or column through other connecting components.

[0064] The steel structure of this embodiment quickly connects and positions the node, and the F-type buckle 62 locks the parent node 61 and the child node 63 together, and the bevel 65 holds the F-type buckle 62, the parent node 61, and the child node 63 tightly together, and the original bolt connection between the beams or columns is changed into a buckle-type force-bearing connection, so that the node connection positioning and force-bearing mode are optimized, and at the same time, the operation of the beams or columns in the node connection installation is simple, time is saved, and the installation efficiency is effectively improved.

[0065] The above is only a preferred embodiment of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention, which should also be regarded as the protection scope of the present invention.

[0066] The parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part that are not explained adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery and equipment all adopt conventional models in the prior art, and the circuit connection of the equipment adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0067] Although the present invention has been described in detail with reference to the foregoing embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the foregoing embodiments, or to replace some of the technical features therein with equivalents.

[0068] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An assembled building main frame structure, characterized in that: It includes a cross beam (1), an L-shaped node structure (2), a T-shaped node structure (3), a cruciform node structure (4), a column (5) and a column connection node (6). The cross beam (1), the L-shaped node structure (2), the T-shaped node structure (3) and the cruciform node structure (4) form a main beam unit in the shape of a Chinese character "tian" (field). The cruciform node structure (4) is located at the center of the "tian" character, the L-shaped node structures (2) are located at the four corners of the "tian" character, the T-shaped node structures (3) are located in the middle of the sides of the "tian" character, and cross beams (1) are connected between the L-shaped node structures (2) and the T-shaped node structures (3), and between the T-shaped node structures (3) and the cruciform node structure (4); The L-shaped node structure (2), the T-shaped node structure (3) and the cruciform node structure (4) all include a square columnar frame body (11) and a connecting seat (12). Among them, the two connecting seats (12) of the L-shaped node structure (2) are arranged on two adjacent side walls of the columnar frame body (11), the three connecting seats (12) of the T-shaped node structure (3) are sequentially arranged on three adjacent side walls of the columnar frame body (11), the four connecting seats (12) of the cruciform node structure (4) are respectively arranged on the four side walls of the columnar frame body (11). The connecting seat (12) is in a stepped shape distributed downward, and the connecting seat (12) is a frame structure. A connecting hole (13) for connecting and fixing with the cross beam (1) is arranged on the connecting seat (12). The connecting seat (12) is a frame structure with one side open, and the open side of the frame structure is used for screwing the connecting bolts on the connecting surface. Two supporting platforms (14) are annularly arranged on the side wall of the columnar frame body (11). The two supporting platforms (14) are distributed vertically, and the two supporting platforms (14) are respectively aligned with the upper and lower ends of the connecting seat (12); Columns (5) are sleeved on the upper and lower ends of the columnar frame body (11). The columns (5) are limited by the supporting platforms (14). A column connection node (6) is arranged on the column (5). The column connection node (6) includes a mother node (61), a child node (63), a plurality of F-shaped fasteners (62) and a plurality of inclined wedges (65). The mother node (61) and the child node (63) are embedded and locked together as a whole through the plurality of F-shaped fasteners (62) and the plurality of inclined wedges (65). The outer end faces of the mother node (61) and the child node (63) are fixedly connected to the beam or column to be connected; The upper end of the mother node (61) is provided with a circular hole-shaped recess (6101), the upper end side wall is provided with a plurality of mother node circular holes (6102), and the inner side of the mother node (61) is provided with a mother node groove (6103); the lower end of the child node (63) is provided with a cylindrical boss (6301), the bottom of the cylindrical boss (6301) is provided with a plurality of child node U-shaped grooves (6302), and the inner side of the child node (63) is provided with a child node groove (6303); the upper and lower ends of the F-shaped buckle (62) are provided with buckle bosses (6201); the two ends of the inclined wedge (65) are provided with inclined wedge bosses (6501), and the middle part is provided with an inclined wedge screw The bolt hole (6502) is provided. The circular hole-shaped concave platform (6101) of the mother node (61) is snap-fitted with the cylindrical boss (6301) of the child node (63). The F-shaped buckles (62) and the inclined wedges (65) are arranged alternately. The buckle bosses (6201) and the inclined wedge bosses (6501) at the upper and lower ends thereof are snap-fitted with the mother node groove (6103) and the child node groove (6303) respectively. The mother node (61), the child node (63) and the inclined wedge (65) are fixedly connected by bolt 2 (66) passing through the mother node circular hole (6102), the child node U-shaped groove (6302) and the inclined wedge bolt hole (6502). A snap bolt hole (6202) is provided in the middle of the F-shaped snap fastener (62), and the mother node (61), the child node (63) and the F-shaped snap fastener (62) are fixedly connected by a bolt 1 (64) passing through the mother node circular hole (6102), the child node U-shaped groove (6302) and the snap bolt hole (6202).

2. The main frame structure of an assembled building according to claim 1, characterized in that: The parent node (61) and the child node (63) are directly welded to the two beams or columns to be connected or are welded together through connecting components.

3. The main frame structure of an assembled building according to claim 1, characterized in that: The bolt 1 (64) is a hexagon socket head bolt.

4. The main frame structure of an assembled building according to claim 1, characterized in that: The second bolt (66) is an external hexagonal bolt.

5. The main frame structure of an assembled building according to claim 1, characterized in that: The crossbeam (1) is a frame structure with one side open, and both ends of the crossbeam (1) are provided with end connection seats (21), the end connection seats (21) are in an inverted step shape, the end connection seats (21) are matched and connected with the connection seat (12), the end connection seat (21) is a frame-shaped structure, and the end connection seat (21) is provided with a connecting through hole (23) for connecting and fixing with the connection seat (12), and the end connection seat (21) is a frame-shaped structure with one side open, and the open side of the frame-shaped structure is used for screwing the connecting bolts on the connecting surface.

6. The main frame structure of an assembled building according to claim 5, characterized in that: The step-shaped structures of the connection seat (12) and the end connection seat (21) have at least two layers, which are used for matching, supporting and fixing each other.

7. The main frame structure of an assembled building according to claim 5, characterized in that: The columnar frame (11), the connecting seat (12) and the supporting platform (14) are either integrally formed or fixed by welding, and the end connecting seat (21) and the crossbeam (1) are integrally formed.

8. The main frame structure of an assembled building according to claim 5, characterized in that: A reinforcing rib plate (24) for reinforcing the structure is arranged in the frame-shaped structure of the end connection seat (21).

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