Disassembly-free seven-line steel bar truss floor support plate and edge pressing strip mold structure thereof

Abstract

The utility model relates to the technical field of assembly type buildings, and discloses a disassembly-free seven-line steel bar truss floor support plate and a blank pressing strip mold structure thereof, which comprise a seven-line steel bar truss, a prefabricated bottom plate, glass fiber gridding cloth and a blank pressing strip mold structure, the space between the trusses of the disassembly-free seven-line steel bar truss floor support plate can be flexibly arranged, production is more convenient, and the thickness of a protective layer of the transverse bottom bars is ensured to meet the requirement due to the fact that the V-shaped abutted seams are dense.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated buildings, in particular to a demountable seven-wire steel bar truss floor slab and a pressing strip die structure thereof. Background Technique

[0002] In the existing precast concrete structures, the demountable steel bar truss floor slab is gradually emerging. However, this demountable steel bar truss floor slab has several disadvantages in the application process: 1. The five-wire steel bar truss and the steel mesh need to be welded and combined for secondary shaping, lacking flexibility and being unfavorable for adjusting the spacing of the steel bar trusses of non-standard slabs; 2. There are permanent cold joints at the closely joined seams of the precast bottom plates. Even the caulking filled later cannot meet the strength requirements of the post-cast concrete, resulting in the failure to meet the requirements for the cover thickness of the transverse bottom steel bars; 3. There are burrs and unevenness on the long sides of the precast bottom plates, making it easy to leak slurry at the closely joined seams. Therefore, the utility model provides a demountable seven-wire steel bar truss floor slab and a pressing strip die structure thereof to solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a demountable seven-wire steel bar truss floor slab and a pressing strip die structure thereof to solve the above problems.

[0004] The technical solution of the utility model: A demountable seven-wire steel bar truss floor slab and a pressing strip die structure thereof, comprising:

[0005] A seven-wire steel bar truss, which is composed of an upper chord bar, two lower chord bars and two reinforcing bars welded and connected up and down by two corrugated web bars. The upper chord bar is welded to the top of the two web bars, the lower chord bars are welded to the middle and lower parts of the web bars, and the reinforcing bars are welded to the bottom of the web bars. The cross-sectional shape of the seven-wire steel bar truss is an inverted V shape. The lower chord bars of the seven-wire steel bar truss are located on the upper surface of the precast bottom plate, and the bottoms of the web bars and the reinforcing bars are all embedded in the precast bottom plate;

[0006] A precast bottom plate, which is a fine aggregate concrete layer and is in the shape of a rectangular thin plate, with chamfered bevels left at the upper corners of the two long sides;

[0007] A fiberglass mesh cloth, which is in the shape of a mesh structure and is embedded in the lower surface of the precast bottom plate;

[0008] A pressing strip die structure, which is composed of a longitudinal square tube and two longitudinal angle irons welded and connected up and down by several transverse short square tubes in the middle. The chamfered bevels of the two long sides of the precast bottom plate are shaped by using the hypotenuses of the angle irons in the pressing strip die structure;

[0009] The steel formwork table and the square pipes located on the steel formwork table are used to shape the bottom and side surfaces of the precast floor slab.

[0010] Further, the precast floor slab is provided with a number of mutually parallel seven-wire steel bar trusses.

[0011] Further, upper transverse connecting steel bars can be added between the number of mutually parallel seven-wire steel bar trusses.

[0012] Further, the diameter of the steel bars is 3.0 mm to 12.5 mm.

[0013] Further, the side lengths of the longitudinal square tubes and the transverse short square tubes are 15 mm to 50 mm.

[0014] Further, the standard widths of the precast floor slab are 600 mm, 900 mm, and 1200 mm.

[0015] Further, the thickness of the precast floor slab is 10 mm to 30 mm.

[0016] The utility model has the following beneficial effects:

[0017] The utility model provides a non-dismantling seven-wire steel bar truss floor slab and its edge pressing strip die structure. The spacing of the seven-wire steel bar trusses can be flexibly arranged to adapt to various steel bar combinations.

[0018] Chamfered bevels are left at the upper corners of the two long sides of the precast floor slab, and a V-shaped shape is formed at the tightly joined plate seams, so that the post-cast layer concrete fills the V-shaped seams to ensure that the protective layer thickness of the transverse bottom steel bars meets the requirements.

[0019] In the edge pressing strip die structure, the beveled edges of the angle irons are used to shape the chamfered bevels of the two long sides of the precast floor slab, ensuring that the long sides of the precast floor slab are straight and there are no burrs or flash, ensuring that the plate joints are dense and do not leak slurry. The die can be lifted and removed when the precast floor slab starts to set during the forming process for repeated use. Description of the Drawings

[0020] Figure 1 It is a partial top view of the seven-wire steel bar truss in the first embodiment of the utility model;

[0021] Figure 2 It is a partial top view of the non-dismantling seven-wire steel bar truss floor slab in the first embodiment of the utility model;

[0022] Figure 3 It is a sectional view of the non-dismantling seven-wire steel bar truss floor slab in the first embodiment of the utility model;

[0023] Figure 4Schematic diagram of the joint seam of the demountable seven-wire steel bar truss floor slab for the first embodiment of the present utility model;

[0024] Figure 5 Top view partial schematic diagram of the edge pressing strip die structure for the first embodiment of the present utility model;

[0025] Figure 6 Exploded schematic diagram of the edge pressing strip die structure for the first embodiment of the present utility model;

[0026] Figure 7 Cross-sectional schematic diagram of the edge pressing strip die structure for the first embodiment of the present utility model;

[0027] Figure 8 Combined cross-sectional schematic diagram of the edge pressing strip die structure and the steel formwork table for the first embodiment of the present utility model;

[0028] Figure 9 Cross-sectional schematic diagram during the forming process for the first embodiment of the present utility model;

[0029] Reference numerals: 1, seven-wire steel bar truss; 11, upper chord bar; 12, web bar; 13, lower chord bar; 14, reinforcing bar;

[0030] 2, precast floor slab; 21, chamfered hypotenuse;

[0031] 3, fiberglass mesh cloth;

[0032] 4, edge pressing strip die structure; 41, longitudinal square pipe; 42, transverse short square pipe; 43, longitudinal angle iron;

[0033] 5, steel formwork table; 51, upper square pipe of the steel formwork table. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0035] Refer to Figures 1 to 9 , this embodiment provides a demountable seven-wire steel bar truss floor slab and its edge pressing strip die structure, which includes a seven-wire steel bar truss 1, an upper chord bar 11, a web bar 12, a lower chord bar 13, a reinforcing bar 14, a precast floor slab 2, a chamfered hypotenuse 21, a fiberglass mesh cloth 3, an edge pressing strip die structure 4, a longitudinal square pipe 4, a transverse short square pipe 42, a longitudinal angle iron 43, a steel formwork table 5, and an upper square pipe 51 of the steel formwork table, wherein:

[0036] Seven-wire steel bar truss 1, the seven-wire steel bar truss 1 is composed of an upper chord bar 11, two lower chord bars 13 and two reinforcing bars 14 which are welded and connected up and down by two corrugated web bars 12. The upper chord bar 11 is welded to the top of the two web bars 12, the lower chord bar 13 is welded to the middle and lower parts of the web bar 12, and the reinforcing bar 14 is welded to the bottom of the web bar 12. The cross-sectional shape of the seven-wire steel bar truss 1 is an inverted V shape. The lower chord bar 13 of the seven-wire steel bar truss 1 is located on the upper surface of the precast floor slab 2, and the bottom of the web bar 12 and the reinforcing bar 14 are both buried inside the precast floor slab 2;

[0037] Precast floor slab 2, the precast floor slab 2 is a fine aggregate concrete layer, and its shape feature is a rectangular thin plate shape, with chamfered bevels 21 left at the upper corners of the two long sides;

[0038] Fiberglass mesh cloth 3, the shape feature of the fiberglass mesh cloth 3 is a mesh structure, which is buried on the lower surface of the precast floor slab 2;

[0039] Edge pressing strip die structure 4, the edge pressing strip die structure 4 is composed of a longitudinal square pipe 41 and two longitudinal angle irons 43 which are welded and connected up and down by several intermediate transverse short square pipes 42. The chamfered bevels 21 of the two long sides of the precast floor slab 2 are shaped by using the hypotenuse of the angle iron 43 in the edge pressing strip die structure 4;

[0040] Steel formwork table 5 and square pipes 51 located above the steel formwork table are used to shape the bottom surface and side surface of the precast floor slab 2;

[0041] Furthermore, the precast floor slab 2 is provided with several mutually parallel seven-wire steel bar trusses 1;

[0042] Furthermore, upper transverse connecting steel bars can be added between the several mutually parallel seven-wire steel bar trusses 1;

[0043] Furthermore, the diameter of the steel bars is 3.5 mm to 12.5 mm;

[0044] Furthermore, the side lengths of the longitudinal square pipe 41 and the transverse short square pipes 42 are 15 mm to 50 mm;

[0045] Furthermore, the standard widths of the precast floor slab 2 are 600 mm, 900 mm and 1200 mm.

[0046] Furthermore, the thickness of the precast floor slab 2 is 10 mm to 30 mm.

[0047] Specifically, place the edge pressing bar mold structure 4 on the square tube 51 positioned on the steel mold table 5, place the fiberglass mesh cloth 3, pour thin-layer fine aggregate concrete to form the precast floor slab 2, and then press in several mutually parallel seven-wire steel bar trusses 1. After forming, it is a non-removable seven-wire steel bar truss floor formwork; transport each component to the construction site, splice them with tight joints, and then pour the post-cast layer reinforced concrete. After forming, the structural floor slab is obtained. Embodiment

[0048] Embodiment 2 of the present invention provides a non-removable seven-wire steel bar truss floor formwork and its edge pressing bar mold structure. The difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the square tube in the edge pressing bar mold structure 4 can be replaced with any other section steel.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disassembly-free seven-wire steel bar truss floor decking plate and its edge strip mold structure, characterized in that: include: A seven-wire steel truss (1), wherein the seven-wire steel truss (1) is composed of an upper chord (11), two lower chords (13) and two reinforcing ribs (14) connected by upper and lower welding via two wavy web bars (12), the upper chord (11) being welded to the tops of the two web bars (12), the lower chord (13) being welded to the middle and lower parts of the web bars (12), and the reinforcing ribs (14) being welded to the bottom of the web bars (12), the cross-section of the seven-wire steel truss (1) being in an inverted V shape, the lower chord (13) of the seven-wire steel truss (1) being located on the upper surface of the prefabricated bottom plate (2), and the bottoms of the web bars (12) and the reinforcing ribs (14) being buried inside the prefabricated bottom plate (2); A prefabricated bottom plate (2), the prefabricated bottom plate (2) being a fine stone concrete layer, having a rectangular thin plate shape, and having chamfered edges (21) at the upper corners of two long sides; A glass fiber mesh cloth (3), the glass fiber mesh cloth (3) having a mesh structure and embedded in the lower surface of the prefabricated bottom plate (2); A trim strip mold structure (4), the trim strip mold structure (4) is composed of a longitudinal square tube (41) and two longitudinal triangle irons (43) connected by welding up and down through a plurality of transverse short square tubes (42) in the middle, and the beveled edges of the triangle irons (43) in the trim strip mold structure (4) are used to shape the chamfered beveled edges (21) of the two long sides of the prefabricated bottom plate (2); A steel mold platform (5) and a square tube (51) located on the steel mold platform are used to shape the bottom surface and side surfaces of the prefabricated bottom plate (2).

2. The non-disassembly type seven-wire steel bar truss floor deck and its edge strip mold structure according to claim 1 is characterized by: The prefabricated bottom plate (2) is provided with a plurality of mutually parallel seven-wire steel bar trusses (1).

3. The non-disassembly type seven-wire steel bar truss floor deck and its edge strip mold structure according to claim 1 is characterized by: Upper transverse connecting steel bars may be added between the plurality of mutually parallel seven-wire steel bar trusses (1).

4. The non-disassembly type seven-wire steel bar truss floor deck and its edge strip mold structure according to claim 1 is characterized by: The diameter of the steel bar is 3.5 mm to 12.5 mm.

5. The non-disassembly type seven-wire steel bar truss floor deck and its edge strip mold structure according to claim 1 is characterized by: The side lengths of the longitudinal square tube (41) and the transverse short square tube (42) are 15 mm to 50 mm.

6. The non-disassembly type seven-wire steel bar truss floor deck and its edge strip mold structure according to claim 1 is characterized by: The standard widths of the prefabricated base plate (2) are 600 mm, 900 mm and 1200 mm.

7. The non-disassembly type seven-wire steel bar truss floor deck and its edge strip mold structure according to claim 1 is characterized by: The thickness of the prefabricated bottom plate (2) is 10 mm to 30 mm.

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