Precise positioning device for prefabricated floor slab

Abstract

The utility model discloses a precise positioning device for a prefabricated floor slab, which relates to the field of prefabricated building production and is characterized by comprising a concrete body, a plurality of support steel bars, a sleeve, a horizontal plate and a limiting plate, the support steel bars are vertically arranged, the bottom ends of all the support steel bars are embedded into the top of the concrete body, and the sleeve is sleeved on the horizontal plate. The top end of each support steel bar is in threaded connection with a sleeve, and the top ends of all the sleeves are fixedly connected with the bottom face of the horizontal plate. The bottom end of the limiting plate is vertically fixed to the top face of the horizontal plate, and the limiting plate is located on one side of the horizontal plate. After at least three devices are arranged on each edge of a positioning area of the prefabricated floor slab, the positioning of the prefabricated floor slab can be realized. The device is simple in structure, low in cost and high in construction efficiency, precise positioning of the prefabricated floor slab can be achieved without manual assistance, the installation precision and safety of the prefabricated floor slab are improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the field of assembled building production, and more specifically, to a device for accurately positioning prefabricated floor slabs. Background Art

[0002] Prefabricated buildings refer to buildings that transfer a large amount of on-site work in traditional construction methods to engineering projects, where building components and accessories are manufactured in factories, transported to the site, and assembled and installed on site through reliable connection methods. Prefabricated buildings mainly include prefabricated concrete structures, steel structures, modern wooden structures, etc. Because they use standardized design, factory production, assembly construction, information management, and intelligent applications, they are representatives of modern industrialized production methods.

[0003] In existing prefabricated buildings, the installation and positioning of prefabricated components such as floor slabs and beams are generally carried out by lifting machinery, with manual assistance to complete the positioning. This positioning method is not only low in safety, reliability and accuracy, but also only suitable for lightweight and small-module prefabricated components. When the weight and volume of prefabricated components increase, the difficulty of lifting and the quality and safety risks also increase.

[0004] Chinese patent CN2043708341U provides a composite beam bottom support tool, which includes an adjustable vertical support rod, a horizontal support plate, and side plates respectively fixed at both ends of the horizontal support plate, and the upper end of the vertical support rod is connected and fixed to the lower bottom of the horizontal support plate. The side plates respectively fixed at both ends of the horizontal support plate are perpendicular to the horizontal support plate, and the two side plates are vertically upward or one side plate of the two side plates is vertically upward and the other side plate is vertically downward, which can be respectively used for supporting composite beams on window holes of prefabricated wall panels and supporting composite beams at prefabricated wall panels without window holes. The composite beam can be placed in a groove formed by two side plates and a horizontal support plate to achieve precise positioning, without the need for manual auxiliary positioning, and greatly improve safety.

[0005] However, the above patent is not applicable to the positioning of prefabricated floor slabs, because the prefabricated floor slabs are large in size, the required horizontal support plates are large in size, the required number of vertical support rods is large, the cost is high, the erection time is long, and the construction efficiency is low.

[0006] Therefore, there is an urgent need to study a prefabricated floor positioning and installation device with simple structure, low cost and high construction efficiency. Utility Model Content

[0007] In view of the problem that there is no low-cost, easy-to-erect and high-efficiency prefabricated floor positioning and installation device in the prior art, the purpose of the utility model is to provide a prefabricated floor precise positioning device, which includes a concrete body, support steel bars, sleeves, horizontal plates and limit plates, wherein a plurality of support steel bars are provided, all of which are vertically arranged, and the bottom ends of all support steel bars are immersed in the top of the concrete body, and the top end of each support steel bar is threadedly connected to a sleeve, and the top ends of all sleeves are fixedly connected to the bottom surface of the horizontal plate; the bottom end of the limit plate is vertically fixed to the top surface of the horizontal plate, and the limit plate is located on one side of the horizontal plate.

[0008] The utility model is further configured as follows: at least four support steel bars are provided, and all the support steel bars are distributed in a rectangular array.

[0009] The utility model is further configured as follows: the support steel bar is a hot-rolled ribbed steel bar with a yield strength of 400 MPA.

[0010] The utility model is further configured as follows: the diameter of the support steel bar is greater than or equal to 40 mm; along the array direction of the support steel bars, the horizontal spacing between two adjacent support steel bars is greater than or equal to 1000 mm; the larger the diameter of the support steel bar, the larger the horizontal spacing between two adjacent support steel bars along the array direction of the support steel bars.

[0011] The utility model is further configured as follows: the top end of the limit plate is inclined in a direction away from the horizontal plate.

[0012] The utility model is further configured as follows: the angle between the inclined portion at the top end of the limiting plate and the horizontal plate is 100°-120°.

[0013] The utility model is further configured as follows: the length of the support steel bar located above the concrete body is greater than or equal to 100 mm.

[0014] The utility model is further configured as follows: the limit plate and the horizontal plate are both steel plates, and the limit plate and the horizontal plate are formed in one piece.

[0015] The utility model is further configured as follows: the connection between the limiting plate and the horizontal plate is arc-shaped.

[0016] The utility model is further configured as follows: the thickness of the limit plate and the horizontal plate is greater than or equal to 20 mm.

[0017] In summary, compared with the prior art, the utility model has the following beneficial effects: the utility model provides a device for precise positioning of prefabricated floor slabs, wherein the limit plate is used to limit the horizontal position of one side of the prefabricated floor slabs, and the horizontal plate is used to limit the longitudinal position of the prefabricated floor slabs. After at least three of the devices are arranged on each edge of the positioning area of ​​the prefabricated floor slabs, the positioning of the prefabricated floor slabs can be achieved. The device has a simple structure, low cost, and high construction efficiency. It can achieve precise positioning of prefabricated floor slabs without manual assistance, improve the installation accuracy and safety of prefabricated floor slabs, and reduce the labor intensity of workers. At the same time, the horizontality of the horizontal plate in the utility model can be adjusted by changing the position of the sleeve on the support steel bar. Since the sleeve is located at the top of the support steel bar, the worker can also place the spirit level on the top surface of the horizontal plate, and quickly adjust the position of the sleeve while observing the spirit level, without the need to frequently look up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The usage status of the embodiment Figure 1 ;

[0019] Figure 2 The usage status of the embodiment Figure 2 .

[0020] In the figure: 1. Concrete body; 2. Support steel bars; 3. Sleeve; 4. Horizontal plate; 5. Precast floor slab; 6. Limiting plate; 61. Inclined part. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0023] like Figure 1-2As shown, it is the basic structure of the preferred embodiment of the utility model. This embodiment provides a device for accurately positioning a prefabricated floor slab, which includes a concrete body 1, a support steel bar 2, a sleeve 3, a horizontal plate 4 and a limit plate 6. The support steel bar 2 is provided in plurality, all of which are vertically provided, and the bottom ends of all the support steel bars 2 are immersed in the top of the concrete body 1. The top end of each support steel bar 2 is threadedly connected to a sleeve 3, and the top ends of all the sleeves 3 are fixedly connected to the bottom surface of the horizontal plate 4; the bottom end of the limit plate 6 is vertically fixed to the top surface of the horizontal plate 4, and the limit plate 6 is located on one side of the horizontal plate 4. The limit plate 6 is used to limit the horizontal position of one side of the prefabricated floor slab 5, and the horizontal plate 4 is used to support the prefabricated floor slab 5 and limit the longitudinal position of the prefabricated floor slab 5.

[0024] In this embodiment, the bottom end of the support steel bar 2 is embedded before the concrete body 1 is poured to improve the connection strength between the support steel bar 2 and the concrete body 1. The embedded depth is calculated according to the following formula: Lab = α × (fy / ft) × d. Wherein: Lab is the embedded depth, mm; fy is the design value of the tensile strength of the support steel bar 2, MPa; ft is the design value of the axial tensile strength of the concrete, MPa; α is the shape coefficient of the support steel bar 2, which is 0.16 for round steel bars and 0.14 for ribbed steel bars; d is the diameter of the support steel bar 2, mm. The concrete body 1 can be a prefabricated wall.

[0025] It should be noted that before the sleeve 3 is connected to the horizontal plate 4, the position of the sleeve 3 on the support steel bar 2 should be adjusted through the threaded connection between the sleeve 3 and the support steel bar 2 until the top surface of the horizontal plate 4 is a horizontal plane, and then the sleeve 3 and the horizontal plate 4 can be fixedly connected together. Since the sleeve 3 is located at the top of the support steel bar 2, the staff can place a spirit level on the top surface of the horizontal plate 4, observe the spirit level and quickly adjust the position of the sleeve 3 without frequently looking up and down. In this embodiment, the sleeve 3 and the horizontal plate 4 are welded together.

[0026] The precise positioning devices for the prefabricated floor 5 need to be used in combination, and each side of the prefabricated floor 5 is positioned by at least three precise positioning devices for the prefabricated floor 5 .

[0027] Specifically, the length of the support steel bar 2 located above the concrete body 1 is greater than or equal to 100 mm, so that there is enough length to adjust the position of the sleeve 3.

[0028] Specifically, at least four support steel bars 2 are provided, and all support steel bars 2 are distributed in a rectangular array. In this embodiment, four support steel bars 2 are provided.

[0029] Specifically, the support steel bar 2 is a hot-rolled ribbed steel bar with a yield strength of 400 MPA.

[0030] Specifically, the diameter of the support steel bar 2 is greater than or equal to 40 mm; along the array direction of the support steel bars 2, the horizontal spacing between two adjacent support steel bars 2 is greater than or equal to 1000 mm; the larger the diameter of the support steel bar 2, the larger the horizontal spacing between two adjacent support steel bars 2 along the array direction of the support steel bars 2. In this embodiment, the diameter of the support steel bar 2 is 40 mm; along the array direction of the support steel bars 2, the horizontal spacing between two adjacent support steel bars 2 is 1000 mm.

[0031] Specifically, the top end of the limiting plate 6 is inclined in a direction away from the horizontal plate 4 to guide the prefabricated floor slab 5 to fall onto the horizontal plate 4 .

[0032] Specifically, the angle between the inclined portion 61 at the top of the limiting plate 6 and the horizontal plate 4 is 100°-120°.

[0033] Specifically, the horizontal plate 4 and the limiting plate 6 are connected by welding, or the horizontal plate 4 and the limiting plate 6 are integrally formed. In this embodiment, the limiting plate 6 and the horizontal plate 4 are integrally formed.

[0034] Specifically, the connection between the limit plate 6 and the horizontal plate 4 is arc-shaped, so that the limit plate 6 and the horizontal plate 4 can be bent into shape by steel plates through bending equipment, thereby improving the production efficiency of the limit plate 6 and the horizontal plate 4 while ensuring the strength and rigidity of the connection between the limit plate 6 and the horizontal plate 4.

[0035] Specifically, the thickness of the limiting plate 6 and the horizontal plate 4 is greater than or equal to 20 mm. In this embodiment, the limiting plate 6 and the horizontal plate 4 are formed by bending a 20 mm thick steel plate.

[0036] In summary, this embodiment provides a device for accurately positioning a prefabricated floor slab, wherein the limit plate 6 is used to limit the horizontal position of one side of the prefabricated floor slab 5, and the horizontal plate 4 is used to limit the longitudinal position of the prefabricated floor slab 5. After at least three of the device are arranged on each edge of the positioning area of ​​the prefabricated floor slab 5, the positioning of the prefabricated floor slab 5 can be achieved. The device has a simple structure, low cost, and high construction efficiency. It can achieve accurate positioning of the prefabricated floor slab 5 without manual assistance, improve the installation accuracy and safety of the prefabricated floor slab 5, and reduce the labor intensity of the staff. At the same time, in this embodiment, the horizontality of the horizontal plate 4 can be adjusted by changing the position of the sleeve 3 on the support steel bar 2. Since the sleeve 3 is located at the top of the support steel bar 2, the staff can also place the spirit level on the top surface of the horizontal plate 4, observe the spirit level while quickly adjusting the position of the sleeve 3, without the need to frequently look up and down.

[0037] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for accurately positioning a prefabricated floor, characterized in that: It comprises a concrete body (1), support steel bars (2), sleeves (3), a horizontal plate (4) and a limiting plate (6), wherein a plurality of support steel bars (2) are provided, all of which are vertically arranged, the bottom ends of all of the support steel bars (2) are immersed in the top of the concrete body (1), the top end of each support steel bar (2) is threadedly connected to a sleeve (3), and the top ends of all of the sleeves (3) are fixedly connected to the bottom surface of the horizontal plate (4); the bottom end of the limiting plate (6) is vertically fixed to the top surface of the horizontal plate (4), and the limiting plate (6) is located on one side of the horizontal plate (4).

2. A device for accurately positioning a prefabricated floor slab according to claim 1, characterized in that: At least four support steel bars (2) are provided, and all the support steel bars (2) are distributed in a rectangular array.

3. A device for accurately positioning a prefabricated floor slab according to claim 2, characterized in that: The support steel bars (2) are hot-rolled ribbed steel bars.

4. The device for accurately positioning a prefabricated floor slab according to claim 3, characterized in that: The diameter of the support steel bar (2) is greater than or equal to 40 mm; along the array direction of the support steel bars (2), the horizontal spacing between two adjacent support steel bars (2) is greater than or equal to 1000 mm; the larger the diameter of the support steel bar (2), the larger the horizontal spacing between two adjacent support steel bars (2) along the array direction of the support steel bars (2).

5. A device for accurately positioning a prefabricated floor slab according to any one of claims 1 to 4, characterized in that: The top end of the limiting plate (6) is inclined in a direction away from the horizontal plate (4).

6. The device for accurately positioning a prefabricated floor slab according to claim 5, characterized in that: The angle between the inclined portion (61) at the top end of the limiting plate (6) and the horizontal plate (4) is 100°-120°.

7. A device for accurately positioning a prefabricated floor slab according to any one of claims 1 to 4, characterized in that: The length of the support steel bar (2) located above the concrete body (1) is greater than or equal to 100 mm.

8. The device for accurately positioning a prefabricated floor slab according to claim 1, characterized in that: The limiting plate (6) and the horizontal plate (4) are both steel plates, and the limiting plate (6) and the horizontal plate (4) are integrally formed.

9. The device for accurately positioning a prefabricated floor slab according to claim 8, characterized in that: The connection between the limiting plate (6) and the horizontal plate (4) is arc-shaped.

10. A device for accurately positioning a prefabricated floor slab according to claim 8 or 9, characterized in that: The thickness of the limiting plate (6) and the horizontal plate (4) is greater than or equal to 20 mm.

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