Prefabricated beam and girder concrete pouring and steel bar formwork inspection platform

Abstract

The utility model discloses a prefabricated transverse and longitudinal beam concrete pouring and steel bar template inspection platform, including platform frame, guardrail, support rod, steel mesh and triangular support frame, guardrail is welded on platform frame, and support rod sets up in platform frame, and steel mesh is laid on platform frame, and the top end and side end of triangular support frame are fastened and are connected respectively on the bottom end of platform frame and the outside of prefabricated longitudinal beam concrete steel template through a plurality of bolts and nuts, the operation platform of the utility model in this way extends the template, can guarantee that construction personnel carries out concrete pouring, template fastening, steel bar template inspection, provides safe good construction environment, fastens directly on the steel template through the bolt, need not welding fixed, hoists and leaves after construction is completed, has realized convenient installation, convenient dismounting, the characteristics of repeated use.

Description

Technical Field

[0001] This utility model relates to the field of precast component construction technology, and in particular to a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform. Background Technology

[0002] With the rapid development of my country's construction industrialization, prefabricated assembly structures have been widely used in building engineering. The construction technology of prefabricated components is closely related to the demands of building industrialization and efficiency improvement. Traditional on-site construction suffers from low efficiency, high energy consumption, and unstable quality. Prefabricated components, through factory production, can achieve standardized and large-scale manufacturing, thereby improving construction efficiency.

[0003] The core of precast component technology is to promote the transformation of the construction industry towards industrialization and intelligence through the "factory prefabrication + on-site assembly" model, and it is now widely used in residential, bridge, and municipal engineering projects. However, in actual construction, the height of precast horizontal and vertical beams is relatively high, making it difficult for construction workers to pour concrete and inspect and adjust the reinforcement and formwork. Traditional methods usually require the erection of temporary scaffolding, which has disadvantages such as long erection period, poor stability, and inconvenience in movement, seriously affecting construction efficiency and quality and safety. Therefore, a precast horizontal and vertical beam concrete pouring and reinforcement and formwork inspection platform is needed to meet these needs. Utility Model Content

[0004] The purpose of this utility model is to provide a precast concrete pouring and rebar formwork inspection platform for transverse and longitudinal beams, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precast concrete pouring and rebar formwork inspection platform for horizontal and vertical beams, comprising a platform frame, guardrails, support rods, steel mesh, and triangular support frames. The guardrails are welded to the platform frame, the support rods are set inside the platform frame, the steel mesh is laid on the platform frame, and the top and side ends of the triangular support frames are respectively fastened to the bottom end of the platform frame and the outside of the precast concrete steel formwork for the vertical beams by a number of bolts and nuts.

[0006] The platform frame, serving as the main load-bearing structure of the entire platform, is constructed by welding two parallel long channel steels of equal length and several parallel short channel steels of equal length together in a rectangular shape. The long and short channel steels are standard hot-rolled channel steel of Q235B material, possessing sufficient strength and rigidity.

[0007] The guardrail is constructed from DN50 steel pipes and includes uprights, horizontal bars, and intermediate railings, forming a complete protective system. The guardrail height is no less than 1.2 meters, and the spacing between the uprights is no greater than 2 meters.

[0008] The support rods are made of φ10mm HRB300 steel bars, welded at equal intervals between two long channel steels with a spacing of 300mm. These support rods not only enhance the overall rigidity of the platform frame but also provide additional support points for the steel mesh.

[0009] The steel mesh is made of standard steel reinforcing mesh spliced ​​together, with a mesh size of 50mm × 50mm, which can prevent small tools from falling while ensuring good visibility. The surface of the steel mesh is hot-dip galvanized, providing good corrosion resistance.

[0010] The triangular support frame is made of three channel steels welded into a right-angled triangle structure, and the ratio of the hypotenuse to the right-angled side is designed according to the actual support requirements.

[0011] Preferably, two lifting lugs are symmetrically welded to the top of the side where the platform frame connects to the guardrail. The lifting lugs are made of Q235B steel plate with a thickness of not less than 10mm, and the holes of the lifting lugs are lined with wear-resistant sleeves for easy reuse.

[0012] Preferably, the steel mesh is fitted around the perimeter into the grooves of the long channel steel and the short channel steel at the ends, and is fixed by the natural positioning of the channel steel, without the need for additional fasteners. This design ensures both ease of installation and convenient replacement and maintenance in the future.

[0013] Preferably, two first insertion holes are provided on the short channel steel and steel template located in the middle, with the hole diameter being 0.5mm larger than the bolt thread section for easy insertion. Two second insertion holes are provided on the top and side ends of the triangular support frame, with the hole diameter being 1mm larger than the maximum outer diameter of the nut. The nut is threadedly connected to the bolt thread section and distributed in the inner frame of the triangular support frame. Two grooved sliders are slidably connected on the top and side ends of the inner frame of the triangular support frame. The grooved sliders are fitted and slidably connected to the flange plate of the channel steel. The end of the grooved slider near the nut is provided with a straight groove. The straight groove extends from the edge of the grooved slider towards the center, and the groove width is adapted to the outer diameter of the bolt thread section. The straight groove design allows the grooved slider to be laterally embedded in the bolt thread section, reducing the number of turns of the nut and achieving quick installation.

[0014] Preferably, a locking bolt is threaded on one side of the groove slider. An M8 hex bolt is used. By tightening the locking bolt, the groove slider is tightly fitted with the flange of the triangular support frame to prevent loosening during construction.

[0015] Preferably, positioning grooves are provided on the bottom ends of both long channel steels. The positioning grooves are arranged along the length of the long channel steels. Two positioning blocks are welded to the top of each triangular support frame. The positioning blocks are fitted into the positioning grooves at the corresponding positions. Several balls are rolledly connected to the top of the positioning blocks. The balls are made of GCr15 bearing steel with a diameter of 8mm. The top of the balls is in contact with the top of the positioning groove.

[0016] Preferably, the positioning block has a semi-circular hole, and a ball is tumbling inside the semi-circular hole, with the opening at the top of the semi-circular hole having a diameter smaller than that of the ball.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides an operating platform that extends from the formwork, ensuring a safe and comfortable construction environment for workers to pour concrete, tighten formwork, and inspect reinforcing steel. The platform is directly bolted to the steel formwork without the need for welding, and can be hoisted away after construction is completed. This design features convenient installation, easy disassembly, and reusability.

[0019] This invention, through the design of positioning grooves, positioning blocks, and ball bearings, allows for fine-tuning of the support frame position, enabling the platform to adapt to template size changes and installation errors within a certain range. At the same time, it achieves the effect of horizontal position transfer of the platform frame, reducing the disassembly, hoisting, and transfer time when inspecting the platform's position change. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the platform frame structure of a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform proposed in this utility model.

[0022] Figure 3 This is an exploded structural diagram of the steel mesh, long channel steel, and short channel steel of a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform proposed in this utility model.

[0023] Figure 4 This is a side view sectional diagram of a triangular support frame for a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform proposed in this utility model.

[0024] Figure 5 This utility model proposes a precast concrete pouring and rebar formwork inspection platform for transverse and longitudinal beams. Figure 4 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This utility model proposes a precast concrete pouring and rebar formwork inspection platform for transverse and longitudinal beams. Figure 4 Enlarged structural diagram at point B;

[0026] Figure 7 This is an exploded structural diagram of the triangular support frame and grooved slider of a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform proposed in this utility model.

[0027] Figure 8 This is a schematic diagram of the straight groove structure of a precast horizontal and vertical beam concrete pouring and rebar formwork inspection platform proposed in this utility model.

[0028] In the diagram: 1. Platform frame; 2. Guardrail; 3. Support rod; 4. Steel mesh; 5. Triangular support frame; 6. Bolt; 7. Nut; 8. Long channel steel; 9. Short channel steel; 10. Lifting lug; 11. First insertion hole; 12. Second insertion hole; 13. Groove slider; 14. Straight groove; 15. Locking bolt; 16. Positioning groove; 17. Positioning block; 18. Ball bearing; 19. Semicircular hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Reference Figure 1-8 A precast concrete pouring and rebar formwork inspection platform for horizontal and vertical beams is mainly composed of a platform frame 1, guardrail 2, support rod 3, steel mesh 4 and triangular support frame 5.

[0031] The platform frame 1 serves as the foundation, constructed from two long channel steels 8 and several short channel steels 9 welded into a rectangle. The guardrail 2 is welded to the platform frame 1. The support rods 3 consist of multiple reinforcing bars, welded equidistantly between the two long channel steels 8. The steel mesh 4, composed of standard reinforcing mesh panels, is laid on the frame 1, its edges embedded in the channel steel grooves, and its center supported by the short channel steels 9 and the support rods 3.

[0032] Two lifting lugs 10 are welded to one side of the platform frame 1 for hoisting. The triangular support frame 5 is a right-angled triangular structure welded from channel steel. Its top end is connected to the short channel steel 9 in the middle of the platform frame 1 by bolts 6 and nuts 7, and its side end is connected to the steel formwork of the precast longitudinal beam by another set of bolts 6 and nuts 7.

[0033] The key improvement lies in the connection points: the short channel steel 9 and the steel template have first insertion holes 11. The top and side surfaces of the triangular support frame 5 have second insertion holes 12. Two grooved sliders 13 are slidably connected to the channel steel flanges of the inner frame of the triangular support frame 5, and their ends have straight grooves 14. During installation, first insert the bolt 6 with the nut 7 into the first insertion hole 11, then align the straight grooves 14 of the grooved sliders 13 of the triangular support frame 5 and engage the bolt rod, push the sliders to make the bolt rod reach the root of the straight groove 14, and finally tighten the nut 7. To prevent the sliders from sliding, locking bolts 15 are provided to tighten the flange plate.

[0034] To further facilitate installation and positioning, the bottom of the long channel steel 8 is provided with a longitudinal positioning groove 16, and the top of the triangular support frame 5 is welded with a positioning block 17 with ball bearings 18. During installation, the positioning block 17 is first inserted into the positioning groove 16, and the longitudinal position of the triangular support frame 5 can be easily adjusted by sliding the ball bearings 18. After alignment, the bolts are tightened. The ball bearings 18 are accommodated in the semi-circular hole 19 of the positioning block 17 and will not fall out.

[0035] Production process:

[0036] First, select two long channel steels (8) of the same length and several short channel steels (9) of the same length. The specifications of the channel steel are selected according to the load-bearing requirements, usually using #8 channel steel. Arrange the short channel steels (9) at equal intervals between the two long channel steels (8), with a spacing of generally 1.0-1.5 meters. Weld using carbon dioxide gas shielded welding to ensure a full and defect-free weld.

[0037] Two lifting lugs 10 are symmetrically welded to the top of one side of the platform frame 1. The position of the lifting lugs 10 is calculated to ensure that the platform remains balanced during hoisting. A positioning groove 16 is machined at the bottom of the long channel steel 8, and milling is used to ensure dimensional accuracy.

[0038] Guardrail 2 is made of φ50×3.0mm steel pipe, with uprights spaced 1.5 meters apart and two horizontal bars. Guardrail 2 is fully welded to platform frame 1, with a weld height of not less than 6mm. The surface of guardrail 2 is painted with alternating yellow and black warning paint.

[0039] Support rod 3 is made of φ10mm steel bars, evenly arranged between the long channel steels 8 at 400mm intervals. Support rod 3 is connected to the long channel steels 8 by arc welding to ensure a firm support.

[0040] Steel mesh panel 4 uses standard steel mesh with a mesh size of 50mm×50mm and a steel bar diameter of φ6mm. Steel mesh panel 4 is manufactured in sections according to the platform dimensions and is laid sequentially from one side to the other, ensuring that it fits snugly within the channel steel groove on all four sides.

[0041] The triangular support frame 5 is made of 8# channel steel, cut to the appropriate length according to the support angle, and welded into a right-angled triangle. Second insertion holes 12 are made at the top and side ends of the support frame to install grooved sliders 13 and locking bolts 15. A positioning block 17 is welded to the top of the support frame, and ball bearings 18 are installed in the semi-circular hole 19.

[0042] Installation and removal process:

[0043] Bolts 6 are inserted into the steel template from the inside out, and nuts 7 are screwed onto the threaded sections extending outwards. A certain distance is maintained between the nuts 7 and the outer side of the steel template. The vertical section of one side of the triangular support frame 5 is brought closer to the outer side of the steel template, so that the nuts 7 pass through the second insertion hole 12 on that side and enter the inner frame of the triangular support frame 5. The groove slider 13 on that side is slid downwards, so that the straight groove 14 at that location wraps around the threaded section extending from the bolts 6, ensuring that the nuts 7 are outside the straight groove 14. At this point, the nuts 7 are tightened. The tightening force between the nuts 7 and the bolts 6, through the groove slider 13, fixes the triangular support frame 5 to the outer side of the steel template. To ensure the stability of the groove slider 13, its position is fixed using locking bolts 15. Bolts 6 are inserted from top to bottom into the short channel steel 9 in the middle of the platform frame 1, and nuts 7 are screwed onto the threaded section at the bottom. A truck crane is used for hoisting, with wire ropes and shackles as lifting tools. The shackles are installed on the platform lifting lugs 10. During hoisting, the platform position is adjusted to ensure that the bottom nut 7 is smoothly inserted from top to bottom into the second insertion hole 12 at the top of the triangular support frame 5, and that the positioning groove 16 covers the positioning block 17. The subsequent tightening method is the same as the fixing method of the triangular support frame 5 on the steel formwork. The shackles can only be removed after tightening. After the platform is installed in place, construction personnel can use the work platform to carry out the concrete pouring and inspection of the precast beam at that location.

[0044] After the inspection is completed, when it is necessary to move the inspection area, loosen the bolts 6 connecting the platform frame 1 and the triangular support frame 5, and completely remove the bolts 6 from the first insertion hole 11 and the second insertion hole 12. Utilize the positioning effect of the positioning block 17 in the positioning groove 16 and the rolling effect of the ball bearing 18 to enable the platform frame 1 to move horizontally. When it is moved to the required position, remove the triangular support frame 5 that was originally located at one end, replace it at the middle of the other end of the platform frame 1 and fix it to the steel template. Then, use the bolts 6 to insert and complete the fixation between the platform frame 1 and the triangular support frame 5. By moving the platform, the disassembly, assembly, hoisting and transfer time of the inspection platform is reduced.

[0045] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A precast concrete pouring and rebar formwork inspection platform for transverse and longitudinal beams, comprising a platform frame (1), guardrails (2), support rods (3), steel mesh (4), and triangular support frame (5), characterized in that: The guardrail (2) is welded to the platform frame (1), the support rod (3) is set inside the platform frame (1), the steel mesh (4) is laid on the platform frame (1), and the top and side ends of the triangular support frame (5) are fastened to the bottom end of the platform frame (1) and the outside of the precast longitudinal beam concrete steel formwork by several bolts (6) and nuts (7). The platform frame (1) is formed by welding two parallel long channel steels (8) of the same length and several parallel short channel steels (9) of the same length in a rectangular shape; The guardrail (2) is welded from several horizontally and vertically distributed steel pipes; The support rod (3) consists of several steel bars, which are welded at equal intervals between two long channel steels (8); The steel mesh (4) is formed by splicing together several steel meshes of the same length and width end to end; The triangular support frame (5) is welded from three channel steels.

2. The precast transverse and longitudinal beam concrete pouring and reinforcement formwork inspection platform according to claim 1, characterized in that: Two lifting lugs (10) are welded on the platform frame (1). The two lifting lugs (10) are symmetrically arranged on the top of the side where the platform frame (1) is connected to the guardrail (2).

3. The precast transverse and longitudinal beam concrete pouring and reinforcement formwork inspection platform according to claim 1, characterized in that: The steel mesh (4) is fitted around the grooves of two long channel steels (8) and two short channel steels (9) located at the ends, and is erected on several short channel steels (9) located in the middle and support rods (3).

4. The precast transverse and longitudinal beam concrete pouring and reinforcement formwork inspection platform according to claim 1, characterized in that: Two first insertion holes (11) are provided on the short channel steel (9) and the steel template located in the middle. The diameter of the first insertion hole (11) is adapted to the outer diameter of the threaded section of the bolt (6). The threaded section of the bolt (6) is inserted into the first insertion hole (11). Two second insertion holes (12) are provided on the top and side of the triangular support frame (5). The diameter of the second insertion hole (12) is adapted to the maximum outer diameter of the nut (7). The nut (7) is threaded on the threaded section of the bolt (6) and distributed in the inner frame of the triangular support frame (5). Two grooved sliders (13) are slidably connected on the top and side of the inner frame of the triangular support frame (5). The grooved sliders (13) are fitted and slidably connected on the flange plate of the channel steel. The grooved slider (13) has a straight groove (14) at the end near the nut (7). The straight groove (14) extends from the edge of the grooved slider (13) to the center. The groove width is adapted to the outer diameter of the threaded section of the bolt (6).

5. The precast transverse and longitudinal beam concrete pouring and reinforcement formwork inspection platform according to claim 4, characterized in that: The groove slider (13) is internally threaded with a locking bolt (15) on one side, and the threaded section of the locking bolt (15) abuts against the outer wall of the channel steel flange of the triangular support frame (5).

6. The precast transverse and longitudinal beam concrete pouring and reinforcement formwork inspection platform according to claim 1, characterized in that: Positioning grooves (16) are provided on the bottom ends of the two long channel steels (8). The positioning grooves (16) are arranged along the length of the long channel steels (8). Two positioning blocks (17) are welded to the top of each triangular support frame (5). The positioning blocks (17) are fitted into the positioning grooves (16) at the corresponding positions. Several balls (18) are rolled inside the top of the positioning blocks (17). The top of the balls (18) is in contact with the top of the positioning grooves (16).

7. The precast transverse and longitudinal beam concrete pouring and reinforcement formwork inspection platform according to claim 6, characterized in that: The positioning block (17) has a semi-circular hole (19) and a ball (18) is rolled inside the semi-circular hole (19). The diameter of the opening at the top of the semi-circular hole (19) is smaller than the diameter of the ball (18).

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