Blind hole bolt key for precast concrete wallboard

Abstract

The blind hole bolt key comprises a bolt key body and an expansion bolt key, the bolt key body comprises a pre-embedded rod, a lifting rod and a limiting plate, the pre-embedded rod and the lifting rod are integrally formed, the limiting plate is fixedly connected between the pre-embedded rod and the lifting rod in a sleeved mode, and the expansion bolt key is arranged between the pre-embedded rod and the lifting rod. A first threaded hole is formed in the top of the embedded rod, the expansion bolt key comprises a connecting key and a top sealing key, a second threaded hole is formed in the top of the connecting key, and screws are arranged at the bottom of the connecting key and the bottom of the top sealing key. The blind hole bolt key for the precast concrete wallboard is advanced in design, compact in structure and convenient to use, bolt keys of different lengths can be rapidly manufactured to meet the requirements of different projects, the defect that a traditional bolt key is unique in length is overcome, purchasing of a plurality of bolt keys of different lengths is avoided, the purchasing cost is reduced, and the production efficiency is improved. Meanwhile, the repeated utilization rate of the bolt key can be improved, and the production cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of embedded parts technology, specifically relating to a blind hole pin key for precast concrete wall panels. Background Technology

[0002] Precast concrete components can accelerate the industrialization of housing and are a key focus of my country's economic system reform. Precast concrete components are concrete structures that are cast on-site and assembled at the final construction site. Precast components of various sizes and shapes can be used to speed up construction. In recent years, precast concrete components, with their low cost, excellent performance, diverse styles, light weight, and outstanding flexural strength and properties, have been widely used in road barriers, water storage tanks, exterior walls, building construction, and decoration, becoming a new favorite in the construction industry.

[0003] Precast concrete wall panels require pre-drilled holes at the bottom to allow the reinforcing bars of the lower wall panel to extend into the pre-drilled holes in the upper wall panel, thus connecting the upper and lower wall panels. Before pouring concrete, a pin is inserted into the mold; after pouring, the pin is removed, leaving the pre-drilled hole at the bottom of the wall panel. Traditional pins are of fixed length, typically 260mm, 280mm, or 300mm. However, different projects require different pin lengths, making them non-interchangeable. Changing projects necessitates purchasing different lengths of pins, leading to high production costs. Furthermore, pins from older projects cannot be reused, resulting in resource waste. Therefore, there is an urgent need to design a blind-hole pin for precast concrete wall panels to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a blind hole key for precast concrete wall panels to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a blind hole key for precast concrete wall panels, comprising:

[0006] The main body of the key pin includes a pre-embedded rod, a lifting rod, and a limiting plate. The pre-embedded rod and the lifting rod are integrally molded. The limiting plate is sleeved and fixed between the pre-embedded rod and the lifting rod. The top of the pre-embedded rod is provided with a threaded hole.

[0007] An extended pin key, comprising a connecting key and a capping key, wherein the top of the connecting key is provided with a threaded hole, and both the connecting key and the capping key are provided with screws at their bottoms.

[0008] Furthermore, the central axis of the embedded rod, the lifting rod, the first threaded hole, the connecting key, the capping key, the second threaded hole, and the screw coincides, the outer diameter of the embedded rod is larger than the outer diameter of the lifting rod, and one end of the lifting rod is provided with a through hole.

[0009] Furthermore, the limiting plate has a cuboid structure and a connecting hole at its center, and the inner diameter of the connecting hole of the limiting plate matches the outer diameter of the embedded rod.

[0010] Furthermore, there are several connecting keys, one of which is fixed to the top of the pre-embedded rod by a screw thread, and another connecting key is fixed to the top of the previous connecting key by a screw thread.

[0011] Furthermore, the outer diameters of the embedded rod, connecting key, and capping key are the same.

[0012] Furthermore, the first threaded hole and the second threaded hole are of the same size and are both threadedly connected to the screw. The length of the screw is not greater than the depth of the first threaded hole and the second threaded hole.

[0013] Furthermore, both the main body of the latch key and the extended latch key are made of cast iron.

[0014] The technical effects and advantages of this utility model are as follows: The blind hole pin key for precast concrete wall panels has an advanced design, compact structure, and is easy to use. By threading several extension pin keys to the top of the pin key body, pin keys of different lengths can be quickly manufactured to meet the requirements of different projects. This overcomes the drawback of the traditional pin key having only one length, avoids the need to purchase multiple pin keys of different lengths, reduces procurement costs, and improves the reusability of pin keys, which is conducive to saving production costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the connecting key of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the capping key of this utility model;

[0018] Figure 4 This is a vertical cross-sectional view of the extended latch key of this utility model.

[0019] In the diagram: 100, main body of the pin key; 101, embedded rod; 102, lifting rod; 103, limiting plate; 104, threaded hole one; 105, through hole; 200, extended pin key; 201, connecting key; 202, capping key; 203, threaded hole two; 204, screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0023] This utility model provides, for example Figure 1-4 A blind-hole key for precast concrete wall panels, as shown, includes:

[0024] The main body 100 of the key includes a pre-embedded rod 101, a lifting rod 102 and a limiting plate 103. The pre-embedded rod 101 and the lifting rod 102 are integrally molded. The limiting plate 103 is sleeved and fixed between the pre-embedded rod 101 and the lifting rod 102. The top of the pre-embedded rod 101 is provided with a threaded hole 104.

[0025] The extended pin key 200 includes a connecting key 201 and a capping key 202. The top of the connecting key 201 is provided with a threaded hole 203, and the bottom of both the connecting key 201 and the capping key 202 are provided with screws 204.

[0026] For example, see Figure 1 and Figure 4As shown, the central axes of the embedded rod 101, the lifting rod 102, the first threaded hole 104, the connecting key 201, the capping key 202, the second threaded hole 203, and the screw 204 coincide. The outer diameter of the embedded rod 101 is larger than the outer diameter of the lifting rod 102. One end of the lifting rod 102 is provided with a through hole 105.

[0027] In this technical solution, the pull rod is inserted into the through hole 105, which facilitates the pulling of the pin key body 100 from the already partially set concrete wall panel, thereby forming a hole in the concrete wall panel. The outer diameter of the pull rod 102 is smaller than the outer diameter of the embedded rod 101, which helps to save manufacturing costs and reduce the weight of the pin key body 100. The central axes of the embedded rod 101 and the pull rod 102 coincide, so that the pulling force can be applied more directly to the embedded rod 101, making it easier to pull out the embedded rod 101.

[0028] For example, see Figure 1 As shown, the limiting plate 103 has a cuboid structure and a connecting hole at the center. The inner diameter of the connecting hole of the limiting plate 103 matches the outer diameter of the embedded rod 101.

[0029] In this technical solution, the limiting plate 103 is sleeved and fixed on the embedded rod 101, which can prevent concrete from flowing out from one end of the embedded rod 101 when pouring concrete. Before pulling out the main body 100 of the pin key, by striking one end of the limiting plate 103, the limiting plate 103 drives the embedded rod 101 to rotate relative to the concrete wall panel, so that the embedded rod 101 is separated from the concrete wall panel, making it convenient to pull out the embedded rod 101.

[0030] For example, see Figure 2 and Figure 4 As shown, there are several connecting keys 201. One connecting key 201 is threadedly fixed to the top of the pre-embedded rod 101 by a screw 204, and another connecting key 201 is threadedly fixed to the top of the previous connecting key 201 by a screw 204.

[0031] In this technical solution, the connecting key 201 is easy to assemble and disassemble. By connecting multiple connecting keys 201 in the above manner, a pin key body 100 of any length can be obtained, which makes the pin key body 100 reusable and helps to reduce production costs.

[0032] For example, see Figure 4 As shown, the outer diameters of the embedded rod 101, the connecting key 201, and the capping key 202 are the same.

[0033] In this technical solution, the main body 100 of the pin can maintain its previous outer diameter after the connecting key 201 is disassembled and assembled, so that the inner diameter of the hole reserved in the concrete wall panel through the main body 100 of the pin is the same, resulting in high appearance quality.

[0034] For example, see Figure 4 As shown, threaded hole 104 and threaded hole 203 have the same dimensions and are both threadedly connected to screw 204. The length of screw 204 is not greater than the depth of threaded hole 104 and threaded hole 203.

[0035] In this technical solution, it can be ensured that any connecting key 201 can be threadedly fixed to the top of the embedded rod 101. At the same time, it can be ensured that there are no gaps between the connecting key 201 and the embedded rod 101, and between the connecting key 201 and the adjacent connecting key 201. This ensures that the main body 100 of the pin key remains a whole after the connecting key 201 is disassembled and installed, preventing concrete from entering the gaps and making it difficult to pull the main body 100 of the pin key out of the concrete wall panel.

[0036] For example, both the main body 100 of the latch key and the extended latch key 200 are made of cast iron.

[0037] In this technical solution, cast iron material has lower cost and stronger compressive and tensile strength.

[0038] Working principle: When using the blind hole pin key for precast concrete wall panels, firstly, a specific number of connecting keys 201 are installed on the embedded rod 101 according to actual needs, and a capping key 202 is installed on the top of the connecting key 201. Then, the pin key body 100 is inserted into the designated position of the precast concrete wall panel mold. After the concrete is poured and initially set, the embedded rod 101 is rotated by the limiting plate 103, so that the embedded rod 101 is separated from the concrete. Then, one end of the pull rod is inserted into the through hole 105 of the lifting rod 102, and the pin key body 100 is pulled out by the pull rod, so that a hole can be reserved in the precast concrete wall panel. The blind hole pin key for precast concrete wall panels features an advanced design, compact structure, and ease of use. By threading several extension pin keys 200 onto the top of the pin key body 100, pin keys of different lengths can be quickly manufactured to meet the requirements of different projects. This overcomes the drawback of traditional pin keys having only one length, avoids the need to purchase multiple pin keys of different lengths, reduces procurement costs, and improves the reusability of pin keys, which is beneficial for saving production costs.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blind-hole key for precast concrete wall panels, characterized in that, include: The main body (100) of the key pin includes a pre-embedded rod (101), a lifting rod (102) and a limiting plate (103). The pre-embedded rod (101) and the lifting rod (102) are integrally molded. The limiting plate (103) is sleeved and fixed between the pre-embedded rod (101) and the lifting rod (102). The top of the pre-embedded rod (101) is provided with a threaded hole (104). An extended pin key (200) is provided, which includes a connecting key (201) and a capping key (202). The top of the connecting key (201) is provided with a threaded hole (203), and the bottom of both the connecting key (201) and the capping key (202) is provided with a screw (204).

2. The blind hole key for precast concrete wall panels according to claim 1, characterized in that: The central axes of the embedded rod (101), the lifting rod (102), the first threaded hole (104), the connecting key (201), the capping key (202), the second threaded hole (203), and the screw (204) coincide. The outer diameter of the embedded rod (101) is larger than the outer diameter of the lifting rod (102). One end of the lifting rod (102) is provided with a through hole (105).

3. The blind hole key for precast concrete wall panels according to claim 1, characterized in that: The limiting plate (103) is a cuboid structure with a connecting hole at the center. The inner diameter of the connecting hole of the limiting plate (103) matches the outer diameter of the embedded rod (101).

4. The blind hole key for precast concrete wall panels according to claim 1, characterized in that: There are several connecting keys (201), one of which is threadedly fixed to the top of the pre-embedded rod (101) by a screw (204), and another connecting key (201) is threadedly fixed to the top of the previous connecting key (201) by a screw (204).

5. The blind hole key for precast concrete wall panels according to claim 1, characterized in that: The pre-embedded rod (101), connecting key (201), and capping key (202) have the same outer diameter.

6. The blind hole key for precast concrete wall panels according to claim 1, characterized in that: The first threaded hole (104) and the second threaded hole (203) are the same size and are both threadedly connected to the screw (204). The length of the screw (204) is not greater than the depth of the first threaded hole (104) and the second threaded hole (203).

7. The blind hole key for precast concrete wall panels according to claim 1, characterized in that: Both the main body (100) and the extended pin (200) are made of cast iron.

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