Prefabricated steel bar truss laminated slab

Abstract

The utility model discloses an assembly type steel bar truss composite board, including the layer of pouring, connecting block and steel bar truss, the connecting block bottom forms the connecting portion for connecting the layer of pouring, and its top two ends form first clamping portion and second clamping portion respectively, first clamping portion and second clamping portion are used for clamping steel bar truss bottom two sides respectively, through the connecting portion for connecting with concrete of forming at the connecting block bottom, first clamping portion and second clamping portion for clamping steel bar truss, the assembly type connection between steel bar truss and connecting block can be realized, to facilitate the transfer and transportation of composite board, wherein, first clamping portion and second clamping portion are the structure of clamping groove and the structure of clamping hole, can realize steel bar truss and the " one and lock " of connecting block, need not welding or bolt fastening, effectively improved the convenient assembly of steel bar truss and connecting block, improved installation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated composite slab technology, specifically relating to a prefabricated steel truss composite slab. Background Technology

[0002] Traditional steel truss composite slabs mostly use welding or bolt connections to fix the steel truss to the base layer, which has problems such as low construction efficiency, poor connection stability, and high labor costs. Although some composite slabs use snap-fit ​​structures, the snap-fit ​​parts are prone to loosening or are difficult to adapt to steel trusses of different specifications. In addition, the bonding strength between the connecting block and the cast layer is insufficient, which affects the overall structural performance. Utility Model Content

[0003] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a prefabricated steel truss composite slab.

[0004] The technical solution adopted in this utility model includes a casting layer, a connecting block, and a steel truss, wherein the casting layer contains steel bars. The bottom of the connecting block forms a connecting part for connecting the cast-in-place layer, and the top two ends of the block form a first snap-fit ​​part and a second snap-fit ​​part, which are respectively used to snap-fit ​​the bottom two sides of the steel truss.

[0005] As a preferred embodiment of this utility model, The first snap-fit ​​portion and the second snap-fit ​​portion are snap-fit ​​groove structures; Alternatively, the first snap-fit ​​portion and the second snap-fit ​​portion may be a snap-fit ​​hole structure; Alternatively, the first snap-fit ​​part may be a snap-fit ​​groove structure, and the second snap-fit ​​part may be a snap-fit ​​hole structure.

[0006] As a preferred embodiment of the present invention, the snap-fit ​​hole structure includes an arc-shaped groove extending along the width direction of the connecting block. The top of one end of the connecting block is obliquely cut inward along the direction of the arc-shaped groove to form an oblique surface. An elastic snap-fit ​​plate is provided on the side of the arc-shaped groove away from the oblique surface. The elastic snap-fit ​​plate and the oblique surface form snap-fit ​​interfaces on opposite sides. The movable end of the elastic snap-fit ​​plate and the arc-shaped groove enclose each other to form a snap-fit ​​hole.

[0007] As a preferred embodiment of this utility model, the fixed end of the elastic plate is fixedly connected to the bottom of the connecting block, and extends along the thickness direction of the connecting block while bending inward along the oblique cut direction to form a U-shaped structure. The end of the elastic plate away from the fixed end forms the movable end, and a reinforcing rib is provided between the elastic plate and the top of the connecting block.

[0008] As a preferred embodiment of this invention, the connecting block has an opening groove that is flush with the snap-fit ​​hole, and the opening groove forms the snap-fit ​​groove structure.

[0009] As a preferred embodiment of the present invention, the connecting part includes a mounting groove formed at the bottom of the connecting block, a mounting plate cast and solidified in the mounting groove, and a limiting clip for limiting the position between the mounting groove and the mounting block.

[0010] As a preferred embodiment of this utility model, one end of the limiting clip is fixedly connected to the connecting block, and the limiting clip is a frustum structure or a cone structure.

[0011] As a preferred embodiment of this invention, the mounting plate has interlocking holes.

[0012] As a preferred embodiment of this invention, the mounting plate is formed by casting and curing a mixture of gypsum, fiber, and metal powder.

[0013] The beneficial effects of this utility model are as follows: This utility model, as a prefabricated steel truss composite slab, achieves an assemblable connection between the steel truss and the connecting block by forming a connecting part for connecting with concrete, and a first and second locking part for locking the steel truss at the bottom of the connecting block. This facilitates the transfer and transportation of the composite slab. The first and second locking parts are locking groove and locking hole structures, respectively, which can achieve "one-plug-and-lock" connection between the steel truss and the connecting block without welding or bolt fastening, effectively improving the convenience of assembly of the steel truss and the connecting block and increasing installation efficiency. The flexible combination of the first and second locking parts can adapt to different steel bar diameters and arrangements. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the first embodiment of the connecting block of this utility model; Figure 3 This is a schematic diagram of the second embodiment of the connecting block of this utility model; Figure 4 This is a schematic diagram of the third embodiment of the connecting block of this utility model; Figure 5 This is a structural schematic diagram from another perspective of the third embodiment of the connecting block of this utility model.

[0016] In the diagram: 1. Cast-in-place layer; 2. Connecting block; 3. Steel truss; 11. Steel bar; 21. First snap-fit ​​part; 22. Second snap-fit ​​part; 23. Connecting part; 211. Arc groove; 212. Beveled surface; 213. Elastic clamping plate; 214. Snap-fit ​​interface; 215. Snap-fit ​​hole; 216. Reinforcing rib plate; 221. Opening groove; 231. Mounting slot; 232. Mounting plate; 233. Limiting clip; 234. Engaging hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] The following is combined with Figure 1-5 This invention describes a prefabricated reinforced steel truss composite slab, comprising: a casting layer 1, a connecting block 2, and a reinforced steel truss 3. The casting layer 1 contains reinforcing bars 11, which improve the bending resistance of the casting layer 1 after curing. The casting materials in the casting layer include high-strength concrete, lightweight expanded clay aggregate with lightweight and heat-insulating properties, and cork particles with sound insulation and anti-friction properties. These materials provide structural strength to the casting layer 1 while reducing the overall weight of the composite slab, thereby reducing transportation costs and handling complexity. The bottom of the connecting block 2 forms a... The connecting part 23 that connects to the cast-in-place layer 1 has a first snap-fit ​​part 21 and a second snap-fit ​​part 22 formed at its top two ends. The first snap-fit ​​part 21 and the second snap-fit ​​part 22 are used to snap the bottom sides of the steel truss 3. The assemblable connection between the connecting block 2 and the steel truss 3 facilitates the transportation of the composite slab. In the fabrication and transportation of the composite slab, the connecting block 2 is formed with the cast-in-place layer 1. At the same time, the first snap-fit ​​part 21 and the second snap-fit ​​part 22 are formed on the top of the connecting block 2 to fix the steel truss 3. The first snap-fit ​​part 21 and the second snap-fit ​​part 22 are used for the assemblable snap-fit ​​of the steel truss 3.

[0020] Please refer to Figures 2-4 As shown, The first snap-fit ​​part 21 and the second snap-fit ​​part 22 can be used interchangeably. In the first embodiment of the first snap-fit ​​part 21 and the second snap-fit ​​part 22, the first snap-fit ​​part 21 and the second snap-fit ​​part 22 are snap-fit ​​groove structures, and the snap-fit ​​double groove structure is used to realize the snap-fit ​​positioning of the bottom two sides of the steel truss 3. In the second embodiment of the first snap-fit ​​part 21 and the second snap-fit ​​part 22, the first snap-fit ​​part 21 and the second snap-fit ​​part 22 are snap-fit ​​hole 215 structures. The snap-fit ​​hole 215 structure is used to realize the snap-fit ​​positioning of the steel truss 3 on the connecting block 2. This embodiment replaces the first snap-fit ​​part 21 and the second snap-fit ​​part 22 with the snap-fit ​​hole 215 structure. Compared with the previous embodiment, this snap-fit ​​structure can avoid the horizontal sliding of the steel truss 3 after snap-fit ​​positioning. In the above embodiment, to avoid the horizontal sliding of the steel truss 3, the bottom positioning steel bar needs to be inserted through the snap-fit ​​groove mechanism first, and then the steel truss 3 structure is formed. This embodiment reduces the assembly of the steel truss 3. In the third embodiment of the first snap-fit ​​part 21 and the second snap-fit ​​part 22, the first snap-fit ​​part 21 is a snap-fit ​​groove structure and the second snap-fit ​​part 22 is a snap-fit ​​hole 215 structure. When snapping and positioning the steel truss 3, the bottom side of the steel truss 3 can be snapped into the snap-fit ​​groove mechanism first, and the other side can be snapped into the snap-fit ​​hole 215 structure. This can prevent the steel truss 3 from sliding laterally after snapping. At the same time, it can adapt to different widths of the steel truss 3 to a certain extent, and avoid the inability to snap with the connecting block 2 due to the production error of the steel truss 3.

[0021] Please refer to Figure 4 As shown, the snap-fit ​​hole 215 structure includes an arc-shaped groove 211 extending along the width direction of the connecting block 2. One end of the connecting block 2 is obliquely cut inward along the direction of the arc-shaped groove 211 to form a chamfered surface 212. An elastic locking plate 213 is provided on the side of the arc-shaped groove 211 away from the chamfered surface 212. The elastic locking plate 213 and the chamfered surface 212 form snap-fit ​​interfaces 214 on opposite sides. The movable end of the elastic locking plate 213 and the arc-shaped groove 211 enclose and form the snap-fit ​​hole 215. When the steel truss 3 is snapped into the snap-fit ​​hole 215 structure, the steel truss 3... Under the guidance of the snap-fit ​​transverse groove, the bottom end is inserted and positioned into the snap-fit ​​expansion hole, that is, it enters the snap-fit ​​hole 215 along the snap-fit ​​interface 214. Since the elastic snap-fit ​​plate 213 includes a movable end and a fixed end, the movable end has a certain elasticity. When the steel truss 3 passes through the lower end of the snap-fit ​​interface 214, the movable end of the elastic snap-fit ​​plate 213 deforms, and the diameter of the lower end of the snap-fit ​​interface 214 increases to allow the steel truss 3 to pass through. After the steel truss 3 passes through the snap-fit ​​interface 214, the movable end of the elastic snap-fit ​​plate 213 resets to achieve the limiting snap-fit ​​of the steel truss 3.

[0022] Please refer to Figure 4As shown, the fixed end of the elastic plate 213 is fixedly connected to the bottom of the connecting block 2, and extends along the thickness direction of the connecting block 2 while bending inward along the direction of the oblique surface 212 to form a U-shaped structure. The end of the elastic plate 213 away from the fixed end forms the movable end, which is used for the locking and limiting of the steel truss 3, and the fixed end is used for the connection between the elastic plate 213 and the connecting block 2. A reinforcing rib plate 216 is provided between the top of the elastic plate 213 and the connecting block 2 to strengthen the connection between the elastic plate 213 and the connecting block 2.

[0023] Please refer to Figure 1 , Figure 4 and Figure 5 As shown, the connecting block 2 has an opening groove 221 that is flush with the snap-fit ​​hole 215. The opening groove 221 forms the snap-fit ​​groove structure. The height of the snap-fit ​​groove on the connecting block 2 matches the diameter of the snap-fit ​​steel bar of the arc groove 211, so as to ensure that the connected steel truss 3 remains parallel to the bottom of the connecting block 2.

[0024] Please refer to Figure 5 As shown, the connecting part 23 includes a mounting slot 231 formed at the bottom of the connecting block 2, a mounting plate 232 cast and solidified in the mounting slot 231, and a limiting member 233 for limiting the mounting slot 231 and the mounting block. The mounting slot 231 is used to connect the mounting plate 232, and the mounting plate 232 and the mounting slot 231 are limited by the limiting member 233.

[0025] Please refer to Figure 5 As shown, one end of the limiting clip 233 is fixedly connected to the connecting block 2. The limiting clip 233 is a frustum structure or a cone structure. During the casting and forming of the mounting plate 232, one end of the limiting clip 233 is fixedly connected to the connecting block 2, and the area of ​​the fixed end is larger than the area of ​​the other end. After the mounting plate 232 is cured, the connection strength in the mounting slot 231 can be effectively improved under the action of the limiting clip 233, and the external tensile strength can be improved.

[0026] Please refer to Figure 5 As shown, the mounting plate 232 has interlocking holes 234. When the casting layer is formed, the casting material enters the interlocking holes 234 and solidifies to form an interlocking structure, thereby improving the connection strength between the connecting block 2 and the casting layer 1.

[0027] Please refer to Figure 5 As shown, the mounting plate 232 is formed by mixing and curing gypsum, fiber and metal powder. The structural strength of the mounting plate 232 can be improved by mixing and limiting the position and using metal powder. By setting the mounting plate 232 and the fact that the material of the mounting plate 232 is gypsum, the firmness of the connection between the connector and the casting layer 1 can be improved.

[0028] Working principle of this utility model: A mixture of gypsum, limiting and metal powder is poured into the mounting groove 231 formed at the bottom of the connecting block 2, and it is cured to form a mounting plate 232. Since the mounting groove 231 is fixedly connected to the limiting clip 233, the limiting clip 233 can improve the firmness of the connection between the fixed mounting plate 232 and the mounting groove 231, and improve the tensile strength of the mounting plate 232. After the mounting plate 232 and the connecting block 2 form an integral structure, concrete is poured in the composite plate mold, and the connecting block 2 is positioned in the concrete so that the concrete covers the upper surface of the mounting plate 232. The concrete is then cured to form an integral structure. The top of the fixedly connected connecting block 2 has a first snap-fit ​​part 21 and a second snap-fit ​​part 22, which are used to snap the steel truss 3 to realize the assemblable installation and disassembly between the steel truss 3 and the connecting plate, thereby reducing the complexity of transportation. In the structure of the first latching part 21 and the second latching part 22: In the first embodiment, the first snap-fit ​​part 21 and the second snap-fit ​​part 22 are snap-fit ​​groove structures formed by the opening groove 221, which can realize the snap-fit ​​positioning of the steel truss 3. When assembling the steel truss 3, the two steel bars at the bottom of the steel truss 3 need to be passed through the opening groove 221 to form the steel truss 3 structure. In the second embodiment, the first snap-fit ​​part 21 and the second snap-fit ​​part 22 are snap-fit ​​hole 215 structures. The snap-fit ​​hole 215 includes a snap-fit ​​hole 215 and a snap-fit ​​interface 214. The snap-fit ​​interface 214 uses its inclined surface 212 to guide the steel truss 3. The snap-fit ​​hole 215 provides snap-fit ​​space for the steel truss 3. An elastic snap-fit ​​plate 213 is provided on one side of the snap-fit ​​hole 215 to limit the steel truss 3 snapped in the snap-fit ​​hole 215, so as to prevent the steel truss 3 from coming out of the snap-fit ​​hole 215 after snapping. This embodiment can realize the direct assembly of the steel truss 3 after production, which can eliminate the need for on-site assembly of the steel truss 3. In the third embodiment, the first snap-fit ​​part 21 uses a snap-fit ​​hole 215 structure, and the second snap-fit ​​part 22 uses a snap-fit ​​groove structure. This allows for direct snap-fit ​​of the steel truss 3. Since the snap-fit ​​groove has a certain length, it can snap-fit ​​steel trusses 3 of different widths to avoid the inability to assemble with the connecting block 2 due to production errors of the steel truss 3. At the same time, since one end of this structure is a snap-fit ​​hole 215 structure, the steel truss 3 will not move laterally after snap-fit ​​positioning.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A prefabricated reinforced steel truss composite slab, characterized in that, include: The casting layer (1), the connecting block (2), and the steel truss (3) are provided. The casting layer (1) is provided with steel bars (11). The bottom of the connecting block (2) forms a connecting part (23) for connecting the casting layer (1). The top two ends of the connecting block (2) form a first snap-fit ​​part (21) and a second snap-fit ​​part (22) respectively. The first snap-fit ​​part (21) and the second snap-fit ​​part (22) are respectively used to snap-fit ​​the bottom two sides of the steel truss (3).

2. The prefabricated steel truss (3) composite slab according to claim 1, characterized in that: The first snap-fit ​​portion (21) and the second snap-fit ​​portion (22) are snap-fit ​​groove structures; Alternatively, the first snap-fit ​​portion (21) and the second snap-fit ​​portion (22) may be a snap-fit ​​hole (215) structure; Alternatively, the first snap-fit ​​part (21) may be a snap-fit ​​groove structure, and the second snap-fit ​​part (22) may be a snap-fit ​​hole (215) structure.

3. The prefabricated steel truss (3) composite slab according to claim 2, characterized in that: The snap-fit ​​hole (215) structure includes an arc-shaped groove (211) extending along the width direction of the connecting block (2). The top of one end of the connecting block (2) is obliquely cut inward along the direction of the arc-shaped groove (211) to form an oblique surface (212). An elastic snap plate (213) is provided on the side of the arc-shaped groove (211) away from the oblique surface (212). The elastic snap plate (213) and the oblique surface (212) form snap-fit ​​interfaces (214) on opposite sides. The movable end of the elastic snap plate (213) and the arc-shaped groove (211) enclose and form a snap-fit ​​hole (215).

4. The prefabricated steel truss (3) composite slab according to claim 3, characterized in that: The fixed end of the elastic plate (213) is fixedly connected to the bottom of the connecting block (2), and extends along the thickness direction of the connecting block (2) while bending inward along the direction of the oblique surface (212) to form a U-shaped structure. The end of the elastic plate (213) away from the fixed end forms the movable end. A reinforcing rib plate (216) is provided between the elastic plate (213) and the top of the connecting block (2).

5. The prefabricated steel truss (3) composite slab according to claim 3, characterized in that: The connecting block (2) has an opening groove (221) that is flush with the snap-fit ​​hole (215), and the opening groove (221) forms the snap-fit ​​groove structure.

6. The prefabricated steel truss (3) composite slab according to claim 1, characterized in that: The connecting part (23) includes a mounting slot (231) formed at the bottom of the connecting block (2), a mounting plate (232) cast and solidified in the mounting slot (231), and a limiting member (233) for limiting the position between the mounting slot (231) and the mounting plate (232).

7. A prefabricated steel truss (3) composite slab according to claim 6, characterized in that: One end of the limiting clip (233) is fixedly connected to the mounting slot (231), and the limiting clip (233) is a frustum structure or a cone structure.

8. The prefabricated steel truss (3) composite slab according to claim 7, characterized in that: Engaging holes (234) are formed on the mounting plate (232).

9. A prefabricated steel truss (3) composite slab according to claim 6, characterized in that: The mounting plate (232) is formed by casting and curing a mixture of gypsum, fiber and metal powder.

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