Preformed hole forming device

Abstract

The utility model relates to a preformed hole forming device, and belongs to the technical field of prefabricated parts. Comprising a preformed hole tool, a bottom die and a base, the base is fixed to the bottom die, and the preformed hole tool is detachably connected with the base. The preformed hole tool and the base are detachably designed, so that assembly and disassembly are more convenient and efficient, demolding is performed twice during demolding, and adverse effects on the forming quality in the demolding process are avoided; in addition, the positioning holes are introduced to be used in cooperation with the inserting rods, the installation accuracy is ensured, deviation between the preformed hole tool and the base is avoided, and the preformed hole forming quality is improved.

Description

Technical Field

[0001] This utility model relates to a pre-drilled hole forming device, belonging to the field of prefabricated component technology. Background Technology

[0002] As a crucial material in modern building construction, precast concrete components require pre-drilled holes to meet design and usage requirements. However, the method of hole formation directly impacts the overall quality of the precast components.

[0003] Under traditional production processes, the pre-reserved hole forming in precast concrete components is mainly achieved in the following ways: (1) The mold and the pre-reserved hole tooling are integrated. In this way, when the component thickness is large, there will be problems such as difficulty in demolding the precast component and low demolding efficiency; (2) The mold and the pre-reserved hole tooling are separate. In this way, the pre-reserved hole forming device is mostly fixed with bolts. In this way, there are problems such as poor appearance quality such as grout leakage, burrs, and watermarks during the production process. Utility Model Content

[0004] This utility model proposes a pre-drilling device for ultra-thick precast components, which aims to solve the problems of difficult demolding of pre-drilled hole tooling, poor molding quality, and low demolding efficiency in ultra-thick precast components.

[0005] The technical solution adopted by this utility model is a pre-drilled hole forming device, which includes a pre-drilled hole fixture, a bottom mold and a base. The base is fixed on the bottom mold and the pre-drilled hole fixture is detachably connected to the base.

[0006] Furthermore, the pre-drilled hole fixture has a connecting hole at the bottom, and a nut is fixed on the inner side of the bottom facing the connecting hole. The upper surface of the base has a screw hole for bolts to pass through. The pre-drilled hole fixture is connected to the base by the cooperation of bolts and nuts.

[0007] Furthermore, the pre-drilled hole fixture has a positioning hole at the bottom and an insertion rod at the top of the base, which is inserted into the positioning hole.

[0008] Furthermore, the inner side of the base is a cavity.

[0009] Furthermore, the reserved hole tooling is the same size as the reserved hole of the prefabricated component.

[0010] Furthermore, the top width of the base and the pre-drilled hole fixture is smaller than the bottom width, and the sides of the base and the pre-drilled hole fixture gradually extend from the top to the bottom.

[0011] Furthermore, the bottom width of the pre-drilled hole fixture is equal to the top width of the base.

[0012] Furthermore, the base and the pre-drilled hole fixture are truncated cones in shape.

[0013] Furthermore, the top and bottom cross sections of the base and the pre-drilled hole fixture are both elliptical.

[0014] This utility model discloses a pre-drilled hole forming device. Its advantages are that the pre-drilled hole tooling and the base are designed to be detachable, making assembly and disassembly more convenient and efficient. Furthermore, the demolding is carried out in two stages, avoiding adverse effects on the forming quality during the demolding process. In addition, the use of positioning holes and insert rods ensures the accuracy of installation and avoids misalignment between the pre-drilled hole tooling and the base, thereby improving the forming quality of the pre-drilled hole. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The diagram shown is a structural schematic of Embodiment 1 of this utility model;

[0017] Figure 2 The diagram shown is a schematic diagram of the pre-drilled hole tooling structure in Embodiment 1 of this utility model;

[0018] Figure 3 The diagram shown is a schematic diagram of the base and bottom mold structure in Embodiment 1 of this utility model.

[0019] The figure shows: 1. Pre-drilled hole fixture; 2. Base; 3. Bottom mold; 4. Nut; 5. Positioning hole; 6. Screw hole; 7. Bolt; 8. Insert rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] To further understand the content of this utility model, the technical solution will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figures 1-3 As shown, this embodiment provides a pre-drilled hole forming device, including a pre-drilled hole fixture 1, a bottom mold 3, and a base 2. Several bases 2 are spaced apart and fixed on the bottom mold 3. The pre-drilled hole fixture 1 and the base 2 are detachably connected. Specifically, the pre-drilled hole fixture 1 has a connecting hole at its bottom, and a nut 4 is fixed to the inner side of its bottom facing the connecting hole. The upper surface of the base 2 has a screw hole 6 for bolts 7 to pass through. The pre-drilled hole fixture 1 and the base 2 are connected and fixed by the bolts 7 and the nuts 4, thereby improving the stability and firmness of the pre-drilled hole fixture 1 on the base 2. The pre-drilled hole fixture 1 has the same size as the pre-drilled hole of the prefabricated component, improving the forming quality.

[0023] In addition, the pre-drilled hole fixture 1 is provided with a positioning hole 5 at the bottom and a rod 8 is provided at the top of the base 2. The rod 8 is inserted into the positioning hole 5. The pre-drilled hole fixture 1 can be easily and quickly fixed on the base 2 by the rod 8 and the positioning hole 5, which avoids the pre-drilled hole fixture 1 and the base 2 from being misaligned during the concrete pouring process.

[0024] The top width of the base 2 is smaller than its bottom width, and the sides of the base 2 gradually extend and widen from the top to the bottom; specifically, the base 2 is shaped like a frustum. The top width of the pre-drilled hole fixture 1 is smaller than its bottom width, and the sides of the pre-drilled hole fixture 1 gradually extend and widen from the top to the bottom; the pre-drilled hole fixture 1 is also shaped like a frustum. Furthermore, the bottom width of the pre-drilled hole fixture 1 is equal to the top width of the base 2.

[0025] The base 2 has a hollow interior and a height of 50mm. It is fixed to the bottom mold 3 by welding, with a chamfered weld seam. The depth of the pre-drilled holes inside the precast concrete component is determined by the design drawings; in this embodiment, the depth is 30cm. A rod 8 is inserted into the positioning hole 5, and bolts 7 and nuts 4 are used to fix the pre-drilled hole fixture 1 to the base 2. The bottom mold 3, connected to other molds, forms the shape of the cavity in the precast concrete component. During demolding, a hand is inserted from below the bottom mold 3 into the cavity of the base 2, and bolts 7 are tightened to separate the base 2 from the pre-drilled hole fixture 1. In other words, the base 2 and bottom mold 3 are removed simultaneously, and then the pre-drilled hole fixture 1 is removed from the precast component. The demolding speed can also be accelerated by tapping the pre-drilled hole fixture 1.

[0026] Example 2: Unlike Example 1, the top and bottom cross sections of the base 2 and the pre-drilled hole fixture 1 are both elliptical.

[0027] This invention employs a two-stage demolding process, which solves the problems of difficult demolding, poor molding quality, and low demolding efficiency of pre-drilled hole tooling 1 in ultra-thick precast components.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pre-drilled hole forming device, characterized in that, The device includes a pre-drilled hole fixture (1), a bottom mold (3), and a base (2). The base (2) is fixed on the bottom mold (3). The pre-drilled hole fixture (1) and the base (2) are detachably connected. The pre-drilled hole fixture (1) has a connecting hole at the bottom and a nut (4) is fixed on the inner side of the bottom facing the connecting hole. The upper surface of the base (2) has a screw hole (6) for the bolt (7) to pass through. The pre-drilled hole fixture (1) and the base (2) are connected and fixed by the bolt (7) and the nut (4). The pre-drilled hole fixture (1) has a positioning hole (5) at the bottom and a plug rod (8) is provided on the top of the base (2). The plug rod (8) is inserted into the positioning hole (5).

2. The pre-drilled hole forming device according to claim 1, characterized in that, The inner side of the base (2) is hollow.

3. The pre-drilled hole forming device according to claim 1, characterized in that, The pre-drilled hole fixture (1) is the same size as the pre-drilled hole of the precast component.

4. The pre-drilled hole forming device according to claim 1, characterized in that, The top width of the base (2) and the pre-drilled hole fixture (1) is smaller than the bottom width, and the sides of the base (2) and the pre-drilled hole fixture (1) gradually extend from the top to the bottom.

5. The pre-drilled hole forming device according to claim 4, characterized in that, The bottom width of the pre-drilled hole fixture (1) is equal to the top width of the base (2).

6. A pre-drilled hole forming device according to claim 4 or 5, characterized in that, The base (2) and the pre-drilled hole fixture (1) are truncated cones.

7. The pre-drilled hole forming device according to claim 1, characterized in that, The top and bottom cross sections of the base (2) and the pre-drilled hole fixture (1) are both elliptical.

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