Concrete prefabricated part preformed hole construction device

Abstract

The utility model provides a preformed hole construction device for a concrete prefabricated part. The preformed hole construction device comprises a plurality of preformed hole die units, a connecting steel plate assembly and at least two hole pulling pins. The preformed hole mold unit comprises two pipe fittings and two plates connecting the two pipe fittings, and the two ends of each plate are connected to the tangent positions of the two pipe fittings correspondingly to form a long circular hole mold. The connecting steel plate assembly comprises a first steel plate, a plurality of third steel plates and a second steel plate which are used for connecting different preformed hole die units; the two first steel plates are respectively used for connecting the pipe fittings on the same side, so that the preformed hole die units are parallel to each other; the third steel plates stretch across the two first steel plates at equal intervals and are fixed to the first steel plates. The second steel plate is parallel to the first steel plate and fixed with the third steel plate; the two ends of the second steel plate are provided with plug pin holes with internal threads, and the hole pulling pins are in threaded fit with the plug pin holes. The device has the advantages of being easy to manufacture, low in cost and good in economical efficiency.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete construction technology, and more specifically, to a precast concrete hole construction device. Background Technology

[0002] Existing construction technology for drainage ditch covers and grates uses standardized molds, which are either mass-produced by prefabrication plants or prefabricated by purchasing molds. Factory prefabrication is suitable for mass production, but for small-volume orders in remote areas, the problems are high cost, uneconomical, and time constraints related to ordering, supply, and transportation from prefabrication plants, resulting in significant safety risks and limited construction time, making it difficult to control the schedule.

[0003] In addition, ordering molds for prefabrication means that the molds cannot be reused and can only be disposed of as waste after construction, which is not economical for small-scale prefabricated projects. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a construction device for pre-drilled holes in precast concrete components that is easy to manufacture, low in cost, and economical.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a precast concrete component pre-drilled hole construction device, comprising several pre-drilled hole mold units, a connecting steel plate assembly, and at least two hole-pulling pins;

[0006] The pre-drilled hole mold unit includes two pipe fittings and two plates connecting the two pipe fittings. The two ends of the plates are respectively connected to the tangent positions of the two pipe fittings. The pipe fittings and plates are combined to form an elongated hole mold.

[0007] The connecting steel plate assembly includes two first steel plates for connecting different pre-drilled hole mold units, several third steel plates for connecting each of the first steel plates, and at least one second steel plate as a reinforcing structure.

[0008] The two first steel plates are used to connect the pipe fittings on the same side, so that the pre-drilled hole mold units are parallel to each other;

[0009] The third steel plate is set across the two first steel plates at equal intervals and is fixed to the first steel plates;

[0010] The second steel plate is arranged parallel to the first steel plate and fixed to the third steel plate;

[0011] The second steel plate has threaded pin holes at both ends, and the pins are threaded into the pin holes.

[0012] Preferably, the pin holes are located at both ends of the second steel plate where they overlap with the third steel plate.

[0013] Preferably, the fitting is a steel pipe.

[0014] Preferably, the plate is an iron sheet or a steel plate, and the pipe is welded and fixed to the plate.

[0015] Preferably, the first steel plate is welded and fixed to the pipe fitting, the first steel plate and the third steel plate, and the second steel plate and the third steel plate.

[0016] Preferably, the pin hole is a through hole with internal threads that passes through the second steel plate and the third steel plate.

[0017] Preferably, the number of the third steel plates is at least three.

[0018] Preferably, the pull pin is T-shaped, and the top horizontal part of the pull pin is a handle.

[0019] Preferably, the number of the pre-drilled hole molds is greater than the number of the third steel plates.

[0020] Preferably, the raw materials for the pipe fittings, plates, and connecting steel plate assemblies are all waste materials.

[0021] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0022] This utility model is composed of pipe fittings, plates and steel plates. These materials are all common materials in engineering construction, and the welding equipment is also commonly used in construction. It can be processed and used at any time, the materials are easy to obtain, the cost is controllable, and the overall structure is simple and easy to prepare. When used with the mold of precast concrete components, it greatly reduces the technical difficulty of the construction of reserved holes. Attached Figure Description

[0023] Figure 1 This is a plan view of a precast concrete component pre-drilled hole construction device according to this utility model.

[0024] Figure 2 This is a schematic diagram of the construction status of a precast concrete component pre-drilled hole construction device according to this utility model.

[0025] Figure 3 This is a schematic diagram of a hole-pulling pin in a precast concrete component pre-drilled hole construction device of this utility model.

[0026] Figure 4 This is a cross-sectional view of a precast concrete component pre-drilled hole construction device according to this utility model.

[0027] Figure 5 This is a plan view of a single pre-drilled hole mold unit in this utility model.

[0028] In the figure: 100. Pre-drilled hole mold unit; 200. Connecting steel plate assembly; 300. Drilling pin; 400. Concrete precast slab mold; 101. Pipe fitting; 102. Plate fitting; 201. First steel plate; 202. Second steel plate; 203. Third steel plate; 204. Pin hole. Detailed Implementation

[0029] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0030] like Figures 1-5 As shown, a precast concrete component pre-drilled hole construction device includes several pre-drilled hole mold units 100, a connecting steel plate assembly 200, and at least two hole-pulling pins 300.

[0031] The pre-drilled hole mold unit 100 includes two pipe fittings 101 and two plates 102 connecting the two pipe fittings. In this embodiment, the pipe fittings 101 are made of steel pipes, and the plates 102 are made of iron sheets or thin steel plates. The two ends of the plates 102 are respectively connected to the tangent positions of the two pipe fittings 101, and the two are welded and fixedly connected. The pipe fittings 101 and the plates 102 are combined to form an elongated hole mold. When casting precast concrete, the enclosed area inside the pipe fittings 101 and the plates 102 is left empty. After the precast concrete is formed, the plates are pulled out to form an elongated hole.

[0032] The connecting steel plate assembly 200 includes two first steel plates 201 for connecting different pre-drilled hole mold units, a plurality of third steel plates 203 for connecting each of the first steel plates 201, and at least one second steel plate 202 as a reinforcing structure.

[0033] In this embodiment, the two first steel plates 201 are respectively used to connect the pipe fittings 101 on the same side, and are connected by welding so that the reserved hole mold units 100 are parallel to each other. The specific number of reserved hole mold units 100 depends on the actual needs. The number of reserved hole mold units is set according to the number of grate holes required.

[0034] The third steel plate 203 is set across the two first steel plates 201 at equal intervals and is welded and fixed to the first steel plate 21. In this embodiment, there are three third steel plates. In other embodiments, the number of third steel plates 203 can be appropriately increased according to the size of the entire device. The number of reserved hole molds is greater than the number of third steel plates.

[0035] The second steel plate 202 is arranged parallel to the first steel plate 201 and fixed to the third steel plate 203. In this embodiment, the second steel plate 202 is located in the middle position between the two first steel plates 201. The bottom end of the second steel plate 202 can be welded to the plate 102 or not.

[0036] The second steel plate 202 has threaded pin holes 204 at both ends. The pull pin 300 is threaded into the pin holes 204. In this embodiment, the pin holes 204 are located at the intersection of the two ends of the second steel plate 202 and the third steel plate 203. The pin holes 204 are threaded through holes that pass through the second steel plate 202 and the third steel plate 203. By increasing the length of the pin holes 204, the installation firmness of the pull pin 300 is increased.

[0037] In this embodiment, the hole-pulling pin 300 is T-shaped, and the top horizontal part of the hole-pulling pin 300 is a handle, which is used as an operating handle to lift the entire device during the later demolding process.

[0038] The raw materials used for the pipe fittings, plates and connecting steel plate assemblies in this embodiment are all waste materials, which are widely available, easy to obtain, and the processing is very simple.

[0039] Explanation of operating principles:

[0040] This device is a pre-drilled hole construction device, used only to form pre-drilled holes. Therefore, it is used in conjunction with precast concrete slab molds to process drainage ditch cover grates.

[0041] Specifically, a drainage ditch cover grate is essentially a concrete slab with several elongated holes formed on it. These holes serve as water passages and grates, allowing water to pass through while isolating large particles of debris from the road surface and preventing them from entering the drainage ditch.

[0042] Specifically, when using it, first place the precast concrete slab mold in place. The precast concrete slab mold is usually a cavity with a square bottom and an open top, used to form rectangular precast concrete slabs.

[0043] Then, place the device inside the precast concrete slab mold and adjust the distance between the four sides of the device and the precast concrete slab mold to make its position suitable.

[0044] Once fully in place, the device isolates the internal cavity of the precast concrete slab mold into several elongated hole areas composed of pipes and plates.

[0045] Then, concrete is poured into the precast concrete slab mold. If necessary, steel bars will be added and anchored simultaneously. During the pouring process, the area of ​​the elongated hole should be avoided, and vibration should be used to compact the concrete.

[0046] If necessary, additional loads can be placed above the connecting steel plate assembly 200 to increase the weight of the device and prevent the device from shifting due to vibration caused by tamping.

[0047] After pouring and vibration, once the concrete has initially set, operate the handle of the 300-degree pull pin to vertically lift and raise the entire device. After drying, it will form a drainage ditch cover grate.

[0048] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A device for the construction of a preformed hole in a concrete precast element, characterised in that: The application relates to a reserved hole mold unit, a connecting steel plate assembly and at least two hole pulling pins. The reserved hole mold unit comprises two pipes and two plate pieces connecting the two pipes, the two ends of the plate piece are respectively connected to tangent positions of the two pipes, and the pipe and the plate piece are combined to form an oblong hole mold. The connecting steel plate assembly comprises two first steel plates for connecting different reserved hole mold units, a plurality of third steel plates for connecting the first steel plates, and at least one second steel plate as a reinforcing structure. The two first steel plates are respectively used for connecting the pipes on the same side, so that the reserved hole mold units are parallel to each other. The third steel plates are arranged across the two first steel plates at equal intervals and are fixed with the first steel plates. The second steel plate is arranged parallel to the first steel plate and is fixed with the third steel plate. The two ends of the second steel plate are provided with bolt hole with internal thread, and the hole pulling pin is screwed with the bolt hole.

2. The apparatus of claim 1, wherein: The bolt hole is arranged at the overlapping position of the two ends of the second steel plate and the third steel plate.

3. The apparatus of claim 1, wherein: The pipe is a steel pipe.

4. The apparatus of claim 3, wherein: The plate piece is an iron sheet or a steel plate, and the pipe and the plate piece are welded and fixed.

5. The apparatus of claim 1, wherein: The first steel plate and the pipe, the first steel plate and the third steel plate, and the second steel plate and the third steel plate are welded and fixed.

6. The apparatus of claim 2, wherein: The bolt hole is a through hole with internal thread passing through the second steel plate and the third steel plate.

7. The apparatus of claim 6, wherein: The number of the third steel plates is at least three.

8. The apparatus of claim 1, wherein: The hole pulling pin is in T shape as a whole, and the top end of the horizontal part of the hole pulling pin is a handle.

9. The apparatus of claim 1, wherein: The number of the reserved hole molds is greater than the number of the third steel plates.

10. The apparatus of claim 1, wherein: The raw materials of the pipe, the plate piece and the connecting steel plate assembly are all waste materials.

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