Fabricated composite floor for steel structure house building

Abstract

The invention belongs to the technical field of house building floors, and discloses a fabricated composite floor for steel structure house building. A bottom sealing steel plate is hermetically connected to the lower end of a quadrilateral sealing steel plate, and a top sealing steel plate is hermetically arranged at the upper end of the quadrilateral sealing steel plate; the bottom sealing steel plate, the quadrilateral sealing steel plate and the top sealing steel plate are matched to form a sealing cavity, and the top sealing steel plate is slidably connected into the sealing cavity along the inner wall of the quadrilateral sealing steel plate. The top end sealing steel plate is in threaded connection with a material injection pipe; the lower portion of the material injection pipe is rotationally connected to the top end sealing steel plate, a discharging opening is formed in the pipe wall of the material injection pipe, and the direction of the discharging opening is tangent to the pipe wall of the material injection pipe. According to the composite floor slab, the overall manufacturing is simpler, environment-friendly and better in heat preservation effect, concrete is not needed any more, the concrete wet operation process is omitted, the overall self weight is reduced, it is guaranteed that the upper ends of the composite floor slab are located on the same horizontal plane, and follow-up construction is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of building floor slabs, and in particular relates to an assembled composite floor slab for steel structure building construction. Background Art

[0002] The floor slab of a building refers to the load-bearing part of the floor layer produced between layers when building a house. It divides the house into several layers in the vertical direction, and transmits vertical loads such as people and furniture and the weight of the floor slab to the foundation through walls, beams or columns. It is an important component of the house structure and has multiple functions such as bearing loads, dividing spaces, and providing sound insulation and heat preservation.

[0003] With regard to building floor slabs, the existing technology still has many shortcomings that need to be improved. For example, the most common traditional cast-in-place floor slabs and precast concrete composite floor slabs. Traditional cast-in-place floor slabs require on-site formwork and a large amount of wet concrete work. Precast concrete composite floor slabs have a large self-weight and require a large amount of concrete. In addition, they are not green and environmentally friendly and are not convenient for modular and rapid construction. Summary of the invention

[0004] The purpose of the present invention is to provide an assembled composite floor slab for steel structure building to solve the above problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A prefabricated composite floor for steel structure building, comprising a floor body, the floor body comprising a bottom sealing steel plate, a quadrilateral sealing steel plate and a top sealing steel plate, the bottom sealing steel plate is sealingly connected to the lower end of the quadrilateral sealing steel plate, the top sealing steel plate is sealingly arranged at the upper end of the quadrilateral sealing steel plate, the bottom sealing steel plate, the quadrilateral sealing steel plate and the top sealing steel plate cooperate to form a sealing cavity, and the top sealing steel plate is slidingly connected to the inner wall of the quadrilateral sealing steel plate; an injection pipe is threadedly connected to the top sealing steel plate, for injecting a polyurethane foam filler into the sealing cavity through the injection pipe; the lower part of the injection pipe is rotatably connected to the top sealing steel plate, a discharge port is arranged on the pipe wall of the injection pipe, the direction of the discharge port is tangent to the pipe wall of the injection pipe, and the polyurethane foam filler ejected through the discharge port drives the injection pipe to rotate in the opposite direction, and then the top sealing steel plate is driven to slide upward in the sealing cavity through the rotation of the injection pipe, and the upper end of the top sealing steel plate is flush with the upper end of the quadrilateral sealing steel plate.

[0007] As a preferred technical solution in the present invention, a thread groove is provided in the middle of the lower end of the top sealing steel plate, the upper part of the injection tube is threadedly connected to the thread groove, a bolt connection hole is provided in the middle of the upper end of the top sealing steel plate coaxially with the thread groove, and the bolt connection hole is connected to the thread groove, a sealing bolt is matched and connected in the bolt connection hole, and the upper end of the sealing bolt is flush with the upper end of the top sealing steel plate.

[0008] As a preferred technical solution in the present invention, an upper boss is provided in the middle of the upper end of the bottom sealing steel plate, an inner groove is provided in the middle of the upper end of the upper boss, and a circular boss extending downward is provided in the middle of the lower end of the injection tube, and the circular boss is rotatably connected to the inner groove; the lower end surface of the injection tube outside the circular boss is an annular support surface, and the annular support surface is rotatably connected to the upper end of the upper boss.

[0009] As a preferred technical solution in the present invention, a plurality of first balls are embedded in the outer wall of the circular boss, all of the first balls are in rolling contact with the inner wall of the inner groove, and the outer wall of the circular boss and the inner wall of the inner groove are gap matched; a plurality of second balls are embedded in the upper end of the upper boss, all of the second balls are arranged in a circular array, an annular groove is provided on the annular supporting surface, the upper parts of all the second balls are matched and roll in the annular groove, and the annular supporting surface and the upper end of the upper boss are gap matched.

[0010] As a preferred technical solution in the present invention, a plurality of springs are arranged in the sealing cavity, the two ends of the springs are respectively abutted against the bottom sealing steel plate and the top sealing steel plate, a plurality of limit columns are arranged at the upper end of the bottom sealing steel plate, and the lower part of each spring is sleeved on the outside of a limit column.

[0011] As a preferred technical solution in the present invention, a quadrilateral limiting portion extending toward the middle is provided on the inner wall at the upper end of the quadrilateral sealing steel plate, a limiting sealing hole is formed in the middle of the quadrilateral limiting portion, the limiting sealing hole is a quadrilateral vertical hole and a quadrilateral conical hole that are matched and connected from top to bottom, and the cross-sectional area of ​​the quadrilateral conical hole gradually increases from top to bottom; the edge of the upper end of the top sealing steel plate is matched and sealed in the limiting sealing hole; the bottom sealing steel plate is detachably connected to the quadrilateral sealing steel plate by a plurality of connecting bolts.

[0012] As a preferred technical solution in the present invention, the assembled composite floor for steel structure building includes at least two floor bodies, and one side of the quadrilateral sealing steel plate of any floor body is at least connected to one side of the quadrilateral sealing steel plate of one floor body; the quadrilateral sealing steel plate is formed by connecting four steel plates end to end, and adjacent steel plates are detachably connected by connecting bolts, and the four steel plates are detachably connected to the bottom sealing steel plate by connecting bolts;

[0013] In any two floor slab bodies that are fitted together, the steel plates on one side of the two quadrilateral sealing steel plates that are fitted together are both side connecting plates, and the two side connecting plates that are fitted together are both provided with fitting mechanisms, and the two side connecting plates are fitted together tightly through the fitting mechanisms.

[0014] As a preferred technical solution in the present invention, the fitting mechanism includes a fixed plate connected to the inner wall of the side connecting plate, the fixed plates of the two side connecting plates are arranged correspondingly, an L-shaped slide groove is opened on the fixed plate, the opening of the L-shaped slide groove gradually increases from the outside to the inside, a first through hole is opened on the side connecting plate between the two fixed plates, and the interiors of the two L-shaped slide grooves are matched and connected through two first through holes to form a sliding inner cavity; the fitting mechanism also includes a rack and a gear, the gear is rotatably connected to the sliding inner cavity, one end of the rack is abutted against the fixed plate, and the other end of the rack is slidably penetrated into the sliding inner cavity, and the other ends of the two racks are respectively meshed with the two sides of the gear.

[0015] As a preferred technical solution in the present invention, the rack is an L-shaped structure, one end of the rack is a plate-like structure blocked outside the L-shaped slide groove, the other end of the rack is a rack segment, one side of the rack segment is provided with meshing teeth meshing with the gear, and the other side of the rack segment is in contact with the side wall surface of the sliding inner cavity.

[0016] As a preferred technical solution in the present invention, gears are rotatably connected in the L-shaped slide groove and the first through hole, all the gears are located on the same straight line, and both sides of at least three gears are meshed with two racks.

[0017] Beneficial effect: The present invention combines a bottom sealing steel plate, a quadrilateral sealing steel plate and a top sealing steel plate into a main structure with a sealed cavity inside, thereby ensuring the firmness of the main structure, and an injection pipe is arranged on the top sealing steel plate, so that the polyurethane foam filler is conveniently injected into the sealed cavity through the injection pipe, which can make the overall production simpler, green and environmentally friendly, and have better thermal insulation effect, and no longer need to use concrete, eliminating the process of wet concrete operation and reducing the overall deadweight; wherein the injection pipe is threadedly connected to the top sealing steel plate, and the lower part is rotated It is connected to the top sealing steel plate, and the discharge port of the injection pipe is tangent to the pipe wall of the injection pipe. When the polyurethane foam filler is sprayed out from the discharge port, the spraying speed of the polyurethane foam filler can be controlled so that the polyurethane foam filler can give the injection pipe a reverse force. The reverse force is used to drive the injection pipe to rotate, and the rotating injection pipe can drive the top sealing steel plate to move upward, ensuring that the upper end of the top sealing steel plate can be flush with the upper end of the quadrilateral sealing steel plate, thereby ensuring that the upper end of the composite floor is on the same level, facilitating subsequent construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1is a cross-sectional view of a floor slab body in Embodiment 1 of the present invention;

[0019] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0020] Figure 3 This is a schematic diagram of the connection of adjacent floor slab bodies in the second embodiment of the present invention;

[0021] Figure 4 for Figure 3 Cross-sectional view of the middle structure.

[0022] In the figure: 1-bottom sealing steel plate; 101 upper boss; 102-second ball; 2-quadrilateral sealing steel plate; 201-; 3-top sealing steel plate; 4-injection pipe; 401-discharge port; 402-circular boss; 403-first ball; 5-sealing bolt; 6-spring; 7-fixing plate; 8-rack; 9-gear. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0024] Example:

[0025] like Figure 1 and Figure 2As shown, the present embodiment provides an assembled composite floor for steel structure building, including a floor body, the floor body including a bottom sealing steel plate 1, a quadrilateral sealing steel plate 2 and a top sealing steel plate 3, the bottom sealing steel plate 1 is sealingly connected to the lower end of the quadrilateral sealing steel plate 2, the top sealing steel plate 3 is sealingly arranged at the upper end of the quadrilateral sealing steel plate 2, the bottom sealing steel plate 1, the quadrilateral sealing steel plate 2 and the top sealing steel plate 3 cooperate to form a sealing cavity, and the top sealing steel plate 3 is slidingly connected to the inner wall of the quadrilateral sealing steel plate 2, so that the size of the sealing cavity can be adjusted, so as to facilitate the injection of polyurethane foam filler into the sealing cavity, so that concrete is no longer needed, the process of concrete wet operation is omitted, and the overall dead weight can be reduced, which is also more green and environmentally friendly; the top sealing steel plate 3 is A threaded connection is provided with an injection pipe 4 for injecting polyurethane foam filler into the sealing cavity through the injection pipe 4, which can make the overall production simpler, and is green and environmentally friendly while also having a better thermal insulation effect; the lower part of the injection pipe 4 is rotatably connected to the top sealing steel plate 3, and a discharge port 401 is provided on the tube wall of the injection pipe 4, and the direction of the discharge port 401 is tangent to the tube wall of the injection pipe 4, so that the polyurethane foam filler ejected through the discharge port 401 pushes the injection pipe 4 to rotate in the opposite direction, and then the top sealing steel plate 3 is driven to slide upward in the sealing cavity through the rotation of the injection pipe 4, and the upper end of the top sealing steel plate 3 is flush with the upper end of the quadrilateral sealing steel plate 2, so that after the entire composite floor is produced, the upper end is guaranteed to be on the same horizontal plane, and there will be no height differences.

[0026] The present invention combines a bottom sealing steel plate 1, a quadrilateral sealing steel plate 2 and a top sealing steel plate 3 to form a main structure with a sealed cavity inside, thereby ensuring the firmness of the main structure. An injection pipe 4 is arranged on the top sealing steel plate 3, which is convenient for injecting polyurethane foam filler into the sealed cavity through the injection pipe 4, thereby making the overall production simpler, being green and environmentally friendly, and having a better thermal insulation effect. In addition, concrete is no longer needed, thus eliminating the process of wet concrete operation and reducing the overall deadweight. The injection pipe 4 is threadedly connected to the top sealing steel plate 3, and the lower part is rotatably connected to the top sealing steel plate 3. On the sealing steel plate 3, the discharge port 401 of the injection pipe 4 is tangent to the tube wall of the injection pipe 4. When the polyurethane foam filler is sprayed out from the discharge port 401, the spraying speed of the polyurethane foam filler can be controlled so that the polyurethane foam filler can give the injection pipe 4 a reverse force. The reverse force is used to drive the injection pipe 4 to rotate. The rotating injection pipe 4 can drive the top sealing steel plate 3 to move upward, ensuring that the upper end of the top sealing steel plate 3 can be flush with the upper end of the quadrilateral sealing steel plate 2, thereby ensuring that the upper end of the composite floor is on the same horizontal plane, which is convenient for subsequent construction.

[0027] As a preferred implementation scheme in this embodiment, it needs to be further explained that a threaded groove is provided in the middle of the lower end of the top sealing steel plate 3, and the upper part of the injection tube 4 is threadedly connected to the threaded groove. A bolt connection hole coaxially arranged with the threaded groove is provided in the middle of the upper end of the top sealing steel plate 3, and the bolt connection hole is connected to the threaded groove. When the polyurethane foam filler is injected into the sealing cavity, it is convenient to insert the injection pipe into the bolt connection hole. A sealing bolt 5 is matched and connected in the bolt connection hole. The upper end of the sealing bolt 5 is flush with the upper end of the top sealing steel plate 3. After the polyurethane foam filler is filled, the sealing bolt 5 is installed to block the bolt connection hole without affecting the overall flushness.

[0028] As a preferred implementation scheme in this embodiment, it needs to be further explained that an upper boss 101 is provided in the middle of the upper end of the bottom sealing steel plate 1, an inner groove is opened in the middle of the upper end of the upper boss 101, and a downwardly extending circular boss 402 is provided in the middle of the lower end of the injection tube 4. The circular boss 402 is rotatably connected in the inner groove to ensure the flexibility of the injection tube 4, and also to limit the injection tube 4 to ensure its stability; the lower end face of the injection tube 4 outside the circular boss 402 is an annular supporting surface, and the annular supporting surface is rotatably connected to the upper end of the upper boss 101, to ensure the flexibility of the injection tube 4 while giving the injection tube 4 a supporting force, so that the injection tube 4 can stably rotate on the upper boss 101.

[0029] As a preferred implementation scheme in this embodiment, it needs to be further explained that a plurality of first balls 403 are embedded on the outer wall of the circular boss 402, all of the first balls 403 are in rolling contact with the inner wall of the inner groove, and the outer wall of the circular boss 402 and the inner wall of the inner groove are clearance matched to reduce friction as much as possible, thereby ensuring the flexibility of the injection tube 4 during rotation; a plurality of second balls 102 are embedded in the upper end of the upper boss 101, all of the second balls 102 are arranged in a circular array, and an annular groove is provided on the annular supporting surface, and the upper parts of all the second balls 102 are matched to roll in the annular groove, and the annular supporting surface and the upper end of the upper boss 101 are clearance matched to reduce friction as much as possible, thereby ensuring the flexibility of the injection tube 4 during rotation.

[0030] As a preferred implementation scheme in this embodiment, it needs to be further explained that a plurality of springs 6 are arranged in the sealing cavity, and the two ends of the spring 6 are respectively abutted against the bottom sealing steel plate 1 and the top sealing steel plate 3, so as to reduce the pressure exerted on the injection tube 4 by the weight of the top sealing steel plate 3 as much as possible, so that the injection tube 4 can rotate under the reverse thrust of the polyurethane foam filler, and a plurality of limit columns are arranged on the upper end of the bottom sealing steel plate 1, and the lower part of each spring 6 is sleeved on the outside of a limit column to ensure the stability of the spring 6.

[0031] As a preferred implementation scheme in this embodiment, it needs to be further explained that a quadrilateral limiting portion 201 extending toward the middle is provided on the inner wall of the upper end of the quadrilateral sealing steel plate 2, and a limiting sealing hole is formed in the middle of the quadrilateral limiting portion 201. The limiting sealing hole is a quadrilateral vertical hole and a quadrilateral conical hole that are matched and connected from top to bottom, and the cross-sectional area of ​​the quadrilateral conical hole gradually increases from top to bottom; the edge of the upper part of the top sealing steel plate 3 is matched and sealed in the limiting sealing hole; the bottom sealing steel plate 1 is detachably connected to the quadrilateral sealing steel plate 2 by a plurality of connecting bolts, and when the top sealing steel plate 3 slides upward to the limit position, the upper end of the top sealing steel plate 3 remains flush with the upper end of the quadrilateral sealing steel plate 2.

[0032] Embodiment 2:

[0033] This embodiment is a further improvement made on the basis of the first embodiment. The specific differences between this embodiment and the first embodiment are as follows:

[0034] like Figure 3 and Figure 4 As shown, as a preferred embodiment of the present invention, it needs to be further explained that the assembled composite floor for steel structure building construction includes at least two floor bodies, and one side of the quadrilateral sealing steel plate 2 of any floor body is at least fitted and connected to one side of the quadrilateral sealing steel plate 2 of one floor body; the quadrilateral sealing steel plate 2 is formed by connecting four steel plates end to end, and each steel plate can also be composed of at least two small steel plates in combination and connected, without specific restrictions, and adjacent steel plates are detachably connected by connecting bolts, and the four steel plates are detachably connected to the bottom sealing steel plate 1 by connecting bolts, which is convenient for adjustment according to actual conditions; in any two floor bodies that are fitted and connected, the steel plates on one side of the two quadrilateral sealing steel plates 2 that are fitted and connected are both side connecting plates, and the two side connecting plates that are fitted and connected are both provided with a fitting mechanism, and the two side connecting plates are tightly fitted through the fitting mechanism, thereby ensuring the tightness of the two floor bodies when fitted.

[0035] As a preferred implementation scheme in this embodiment, it needs to be further explained that the fitting mechanism includes a fixed plate 7 connected to the inner wall of the side connecting plate, the fixed plates 7 of the two side connecting plates are correspondingly arranged, an L-shaped slide groove is provided on the fixed plate 7, the opening of the L-shaped slide groove gradually increases from the outside to the inside, and a first through hole is provided on the side connecting plate between the two fixed plates 7. The interiors of the two L-shaped slide grooves are matched and connected through the two first through holes and cooperate to form a sliding inner cavity; the fitting mechanism also includes a rack 8 and a gear 9, the gear 9 is rotatably connected to the sliding inner cavity, one end of the rack 8 is abutted against the fixed plate 7, and the other end of the rack 8 is slidably penetrated in the sliding inner cavity, and the other ends of the two racks 8 are respectively meshed with the two sides of the gear 9, so that the two gears 9 can move synchronously, and in practice, when the polyurethane foam filler is injected into the sealing cavity, the polyurethane foam filler will push one end of the rack 8, and then one end of the two racks 8 will approach each other, in this way, the two side connecting plates are pushed and the two side connecting plates are made to fit more tightly.

[0036] As a preferred implementation scheme in this embodiment, it needs to be further explained that the rack 8 is an L-shaped structure, and one end of the rack 8 is a plate-like structure blocked outside the L-shaped slide groove, thereby ensuring that the polyurethane foam filler acts on one end of the rack 8 when it expands, so that the rack 8 can be pushed to slide into the sliding inner cavity, and the other end of the rack 8 is a rack segment, and one side of the rack segment is provided with meshing teeth meshing with the gear 9, and the other side of the rack segment contacts the side wall surface of the sliding inner cavity, ensuring that the rack 8 can slide stably.

[0037] As a preferred implementation scheme in this embodiment, it needs to be further explained that gears 9 are rotatably connected in the L-shaped slide groove and the first through hole, all gears 9 are located on the same straight line, and both sides of at least three gears 9 are meshed with two racks 8, so that it can be ensured that there are at least two force points on one side of the rack 8, thereby ensuring that the gear 9 will not tilt when sliding, ensuring that it can slide stably.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An assembled composite floor for steel structure building, characterized in that: The floor plate comprises a floor plate body, the floor plate body comprises a bottom sealing steel plate (1), a quadrilateral sealing steel plate (2) and a top sealing steel plate (3), the bottom sealing steel plate (1) is sealingly connected to the lower end of the quadrilateral sealing steel plate (2), the top sealing steel plate (3) is sealingly arranged at the upper end of the quadrilateral sealing steel plate (2), the bottom sealing steel plate (1), the quadrilateral sealing steel plate (2) and the top sealing steel plate (3) cooperate to form a sealing cavity, and the top sealing steel plate (3) is slidably connected to the inner wall of the quadrilateral sealing steel plate (2); the top sealing steel plate (3) is threadedly connected to an injection pipe (4) for injecting The material pipe (4) injects polyurethane foam filler into the sealing cavity; the lower part of the injection pipe (4) is rotatably connected to the top sealing steel plate (3), and a discharge port (401) is provided on the tube wall of the injection pipe (4). The discharge port (401) is tangential to the tube wall of the injection pipe (4), so that the polyurethane foam filler ejected through the discharge port (401) pushes the injection pipe (4) to rotate in the opposite direction, and then the top sealing steel plate (3) is driven to slide upward in the sealing cavity through the rotation of the injection pipe (4), and the upper end of the top sealing steel plate (3) is flush with the upper end of the quadrilateral sealing steel plate (2).

2. The assembled composite floor slab for steel structure building according to claim 1, characterized in that: A thread groove is provided in the middle of the lower end of the top sealing steel plate (3), and the upper part of the injection pipe (4) is threadedly connected in the thread groove. A bolt connection hole is provided in the middle of the upper end of the top sealing steel plate (3) and is coaxially arranged with the thread groove. The bolt connection hole is connected to the thread groove. A sealing bolt (5) is matched and connected in the bolt connection hole. The upper end of the sealing bolt (5) is flush with the upper end of the top sealing steel plate (3).

3. The assembled composite floor slab for steel structure building according to claim 1, characterized in that: An upper boss (101) is provided in the middle of the upper end of the bottom sealing steel plate (1), an inner groove is provided in the middle of the upper end of the upper boss (101), and a circular boss (402) extending downward is provided in the middle of the lower end of the injection tube (4), and the circular boss (402) is rotatably connected to the inner groove; the lower end surface of the injection tube (4) outside the circular boss (402) is an annular support surface, and the annular support surface is rotatably connected to the upper end of the upper boss (101).

4. The assembled composite floor slab for steel structure building according to claim 3, characterized in that: A plurality of first balls (403) are embedded in the outer wall of the circular boss (402), all of which are in rolling contact with the inner wall of the inner groove, and the outer wall of the circular boss (402) and the inner wall of the inner groove are clearance matched; a plurality of second balls (102) are embedded in the upper end of the upper boss (101), all of which are arranged in a circular array, and an annular groove is provided on the annular support surface, and the upper parts of all the second balls (102) are matched and rolled in the annular groove, and the annular support surface and the upper end of the upper boss (101) are clearance matched.

5. The assembled composite floor slab for steel structure building according to claim 1, characterized in that: A plurality of springs (6) are arranged in the sealing cavity, and the two ends of the springs (6) are respectively in contact with the bottom sealing steel plate (1) and the top sealing steel plate (3). A plurality of limit posts are arranged at the upper end of the bottom sealing steel plate (1), and the lower part of each spring (6) is sleeved outside a limit post.

6. An assembled composite floor slab for steel structure building according to any one of claims 1 to 5, characterized in that: A quadrilateral limiting portion (201) extending toward the middle is provided on the inner wall of the upper end of the quadrilateral sealing steel plate (2), and a limiting sealing hole is formed in the middle of the quadrilateral limiting portion (201), the limiting sealing hole being a quadrilateral vertical hole and a quadrilateral conical hole matched and connected from top to bottom, and the cross-sectional area of ​​the quadrilateral conical hole gradually increases from top to bottom; the upper edge of the top sealing steel plate (3) is matched and sealed in the limiting sealing hole; the bottom sealing steel plate (1) is detachably connected to the quadrilateral sealing steel plate (2) by a plurality of connecting bolts.

7. The assembled composite floor slab for steel structure building according to claim 6, characterized in that: The assembled composite floor for steel structure building comprises at least two floor bodies, one side of the quadrilateral sealing steel plate (2) of any floor body is at least connected to one side of the quadrilateral sealing steel plate (2) of one floor body; the quadrilateral sealing steel plate (2) is formed by connecting four steel plates end to end, adjacent steel plates are detachably connected by connecting bolts, and the four steel plates are detachably connected to the bottom sealing steel plate (1) by connecting bolts; In any two floor slab bodies that are connected by abutment, the steel plates on one side of the two quadrilateral sealing steel plates (2) that are connected by abutment are both side connecting plates, and the two side connecting plates that are connected by abutment are both provided with abutment mechanisms, and the two side connecting plates are tightly fitted together by the fitting mechanisms.

8. The assembled composite floor slab for steel structure building according to claim 7, characterized in that: The fitting mechanism comprises a fixing plate (7) connected to the inner wall of the side connecting plate, the fixing plates (7) of the two side connecting plates are arranged correspondingly, an L-shaped slide groove is provided on the fixing plate (7), the opening of the L-shaped slide groove gradually increases from the outside to the inside, a first through hole is provided on the side connecting plate between the two fixing plates (7), the interiors of the two L-shaped slide grooves are matched and connected through the two first through holes and cooperate to form a sliding inner cavity; the fitting mechanism also comprises a rack (8) and a gear (9), the gear (9) is rotatably connected to the sliding inner cavity, one end of the rack (8) is in contact with the fixing plate (7), the other end of the rack (8) is slidably penetrated in the sliding inner cavity, and the other ends of the two racks (8) are respectively meshed with the two sides of the gear (9).

9. The assembled composite floor slab for steel structure building according to claim 8, characterized in that: The rack (8) is an L-shaped structure, one end of the rack (8) is a plate-shaped structure blocked outside the L-shaped slide groove, the other end of the rack (8) is a rack segment, one side of the rack segment is provided with meshing teeth meshing with the gear (9), and the other side of the rack segment is in contact with the side wall surface of the sliding inner cavity.

10. The assembled composite floor slab for steel structure building according to claim 8, characterized in that: Gears (9) are rotatably connected in the L-shaped sliding groove and the first through hole, all the gears (9) are located on the same straight line, and both sides of at least three gears (9) are meshed with the two racks (8).

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