Forming die for rough surface of inner wall of prefabricated concrete hollow wallboard

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a forming die for a rough surface of the inner wall of a prefabricated concrete hollow wallboard, which fully exerts the advantages of flexibility of a sleeve film and rigidity of an inner die through the supporting function of the rigid inner die by utilizing the characteristics that the sleeve film is easy to deform and convenient to demould. By firstly drawing out the inner mold and then drawing out the sleeve film, the rough surface of the inner wall of the prefabricated concrete hollow wallboard is simple to construct, the structural performance of the fabricated concrete shear wall constructed by adopting the prefabricated concrete hollow wallboard can be remarkably improved, the construction efficiency is high, and the cost is low; and popularization and application of the fabricated concrete shear wall technology adopting post-pouring concrete core grouting are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a forming die for the rough surface of the inner wall of a prefabricated concrete hollow wallboard. Background Art

[0002] Prefabricated concrete shear wall technology is evolving towards the use of cast-in-place composite concrete shear walls. Their key advantages include good tolerances, controllable structural quality, convenient and fast production, construction, and installation, and low overall construction costs. However, the challenge of creating a roughened surface on the inner wall of precast hollow concrete panels has long hampered the widespread application of cast-in-place composite concrete shear wall technology, as the lack of a roughened surface on the concrete composite surface can degrade structural performance.

[0003] In the prior art, there are two main methods for providing a rough surface on the inner wall of a precast concrete hollow wall panel:

[0004] One type is to insert disposable molds, such as corrugated pipes. The utility model patent authorization specification CN202120918744.7 discloses a pipe for prefabricated wall position filling and hole forming, which is used to form vertical holes at the edge components of the prefabricated wall during the production process of the prefabricated wall. The pipe is permanently retained in the prefabricated wall. During on-site construction, the vertical steel bars of the edge components of the lower prefabricated wall are extended into the vertical holes of the upper prefabricated wall. The vertical holes of the upper prefabricated wall are poured with post-poured concrete to achieve the overlap connection of the vertical steel bars of the edge components of the upper and lower prefabricated walls. The pipe consists of an upper and lower part. According to the functional changes within the height range of the vertical hole and the number of vertical steel bars of the edge components in the vertical hole, the upper and lower parts of the pipe are composed of pipes of different forms. This new solution avoids the need for specialized core-pulling equipment during prefabricated wall production, resulting in lower hole-forming costs. Furthermore, the lower pipe can be used to create a roughened surface in the rebar overlap area, enhancing the force transmission effect of the rebar overlap. High-pressure water washing to create a roughened surface is unnecessary during prefabricated wall production, resulting in fewer production steps and the degree of roughening is not affected by the worker's skill level. However, the high cost of using disposable molds makes it difficult to gain an advantage in technological competition.

[0005] The other type is reusable forming molds, such as the utility model patent authorization specification CN202110534027.9, which discloses a core-pulling mold, preparation method and application of hollow concrete wall panels. The utility model adopts a combined core-pulling mold to pull the core in steps, reducing the core-pulling resistance and solving the problem that the hollow concrete wall panels are easily damaged during the core-pulling process. At the same time, the combined core-pulling mold realizes the formation of keyways on the inner wall of the hollow hole of the concrete wall panel; the core-pulling mold is used to form keyways on the inner wall of the hollow hole of the concrete wall panel to improve the shear slip resistance of the new and old concrete. The vertical distributed steel bars of the shear wall body are arranged inside the concrete of the precast concrete hollow concrete wall panel, and the connecting steel bars are arranged in the post-poured concrete. The vertical distributed steel bars of the shear wall body are overlapped and connected by the bond strength of the post-poured concrete, the bonding force between the new and old concrete, and the keyway resistance, thereby ensuring that the structural performance of the cast-in-place concrete shear wall is equivalent to that of the cast-in-place concrete shear wall. However, this type of mold requires extremely high production and processing precision and has high manufacturing costs. At the same time, the assembly and disassembly of the mold is labor-intensive and time-consuming, which increases the production cost of precast concrete shear wall components.

[0006] Therefore, it is of great significance to develop a mold that can form a keyway or a rough surface on the inner wall of a concrete hollow wall panel and is easy to assemble and disassemble and relatively easy to prepare. Utility Model Content

[0007] The purpose of the utility model is to overcome the defects of the existing technology and propose a forming mold for the rough surface of the inner wall of a precast concrete hollow wall panel, which can simplify the construction of the rough surface of the inner wall of the precast concrete hollow wall panel, improve the efficiency of house structure construction and reduce costs.

[0008] In order to achieve the above purpose, the present invention adopts the following specific technical solutions:

[0009] The utility model provides a forming mold for the rough surface of the inner wall of a precast concrete hollow wall panel, comprising a sleeve 1 and an inner mold 4. The sleeve 1 is made of rubber material and comprises a sleeve body 2 and convex ribs 3; the interior of the sleeve body 2 is hollow; the convex ribs 3 are fixedly arranged on the outer surface of the sleeve body 2;

[0010] The inner mold 4 is made of a pipe. The outer contour of the inner mold 4 corresponds to the inner hollow contour of the sleeve body 2. The inner mold 4 is arranged in the hollow interior of the sleeve body 2 and is detachably connected to the sleeve 1.

[0011] Furthermore, the hollow inner contour of the cross section of the casing 1 is in the shape of a curve or a polygon or a combination of a curve and a polygon.

[0012] The utility model can achieve the following technical effects:

[0013] The utility model utilizes the characteristics of easy deformation and convenient demoulding of the rubber material of the membrane, and gives full play to the advantages of the flexibility of the membrane and the rigidity of the inner mold through the supporting effect of the rigid inner mold. By first pulling out the inner mold and then pulling out the membrane, the construction of the rough surface of the inner wall of the hollow hole of the precast concrete hollow wall panel is simplified, which can significantly improve the structural performance of the assembled concrete shear wall constructed with the precast concrete hollow wall panel, and has high construction efficiency and low cost, which is conducive to the promotion and application of the assembled concrete shear wall technology with post-cast concrete core filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic cross-sectional view of a rectangular mantle in the present invention;

[0015] Figure 2 It is a schematic longitudinal side elevation view of a rectangular cross-section mantle in the present invention;

[0016] Figure 3 Schematic diagram of the horizontal section AA of the rectangular cross-section of the mantle in the present invention;

[0017] Figure 4 BB is a schematic diagram of the longitudinal section of the rectangular cross-section of the mantle in the present invention;

[0018] Figure 5 This is a schematic cross-sectional view of a circular cross-section of the mantle in the present invention;

[0019] Figure 6 This is a schematic longitudinal side elevation view of a circular cross-section mantle in the present invention;

[0020] Figure 7 Schematic diagram of the horizontal cross-section CC of the circular cross-section of the mantle in the present invention;

[0021] Figure 8 DD is a schematic diagram of the longitudinal vertical section of the circular cross-section of the mantle in the present invention;

[0022] Figure 9 This is a schematic transverse cross-sectional view of the rectangular cross-section inner mold and casing assembly in the precast concrete hollow wall panel of the present invention;

[0023] Figure 10 It is a transverse cross-sectional schematic diagram of the precast concrete hollow wall panel after the inner mold and the casing assembly of the rectangular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0024] Figure 11 This is a longitudinal cross-sectional diagram of the rectangular cross-section inner mold and casing assembly in the precast concrete hollow wall panel of the present invention;

[0025] Figure 12It is a longitudinal cross-sectional schematic diagram of the precast concrete hollow wall panel after the inner mold and the casing assembly of the rectangular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0026] Figure 13 This is a transverse cross-sectional diagram of the circular cross-section inner mold and casing assembly in the precast concrete hollow wall panel of the present invention;

[0027] Figure 14 It is a transverse cross-sectional schematic diagram of the precast concrete hollow wall panel after the inner mold and the casing assembly with a circular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0028] Figure 15 This is a longitudinal cross-sectional diagram of the circular cross-section inner mold and casing membrane assembly in the precast concrete hollow wall panel of the present invention;

[0029] Figure 16 It is a longitudinal cross-sectional schematic diagram of the precast concrete hollow wall panel after the inner mold and the casing assembly with a circular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0030] Figure 17 It is a longitudinal cross-sectional schematic diagram of the circular cross-section inner mold and casing membrane assembly in the plane of the precast concrete hollow wall panel in the utility model;

[0031] Figure 18 It is a longitudinal cross-sectional schematic diagram of the plane of the precast concrete hollow wall panel after the inner mold and the casing membrane assembly with a circular cross-section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel.

[0032] Reference numerals include:

[0033] Cover membrane 1, cover membrane body 2, convex ribs 3, inner mold 4, precast concrete hollow wall panel 5, hollow hole 6, rough surface 7. DETAILED DESCRIPTION

[0034] Hereinafter, the embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, their detailed description will not be repeated.

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0036] The embodiment of the utility model provides a forming mold for the rough surface of the inner wall of a precast concrete hollow wall panel, comprising a cover film 1 and an inner mold 4.

[0037] The cover film 1 is made of rubber material, such as Figures 1 to 8 As shown, it includes a membrane body 2 and a convex rib 3;

[0038] The interior of the membrane body 2 is hollow, and the outer contour of the hollow cross section is a curve or a polygon or a combination of a curve and a polygon;

[0039] The outer surface of the membrane body 2 is fixedly provided with a rib 3; the rib 3 protrudes from the outer surface of the membrane body 2, and the rib 3 is fixedly connected to the membrane body 2;

[0040] The inner mold 4 is made of tubular material, such as Figure 9 、 11 As shown in Figures 13, 15 and 17, the outer contour of the cross section of the inner mold 4 is adapted to the hollow contour of the cross section of the sleeve body 2, and the inner mold 4 and the sleeve 1 are detachably connected.

[0041] The application of the rough surface forming mold for the inner wall of the precast concrete hollow wall panel provided by the embodiment of the present invention is as follows: Figures 9 to 18 As shown, the above-mentioned forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel is used to prepare the rough surface 7 on the inner wall of the hollow hole 6 of the precast concrete hollow wall panel 5, including the following steps, which are performed in sequence:

[0042] Step 1: Prepare the forming mold for the rough inner surface of the precast concrete hollow wall panel

[0043] like Figures 1 to 8 As shown, a rubber material is used to prepare a mantle 1, which includes a mantle body 2 and ribs 3. The interior of the mantle body 2 is hollow, and the hollow profile of its cross section is a curve or a polygon or a combination of a curve and a polygon. The outer surface of the mantle body 2 is provided with ribs 3.

[0044] The inner mold 4 is made of pipe material, and the outer contour of the cross section of the inner mold 4 is adapted to the hollow contour of the cross section of the membrane body 2; the inner mold 4 is inserted into the hollow of the membrane 1 to form a combination to obtain a forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel; the inner mold 4 and the membrane 1 are connected in a detachable movable manner.

[0045] Step 2: Using a forming mold for the rough inner surface of a precast concrete hollow wall panel, the rough inner surface of the precast concrete hollow wall panel is prepared.

[0046] like Figures 9 to 18 As shown, while the precast concrete hollow wall panel 5 is being supported, the forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel is placed therein. After steel bar binding, concrete pouring and curing, when the concrete reaches the demolding strength, the inner mold 4 is first pulled out, and then the sleeve film 1 is pulled out, and a rough surface 7 is made on the inner wall of the hollow hole 6 of the precast concrete hollow wall panel 5.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0049] The above specific embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A forming mold for the rough surface of the inner wall of a precast concrete hollow wall panel, characterized in that: The invention comprises a sleeve (1) and an inner mold (4); the sleeve (1) is made of rubber material and comprises a sleeve body (2) and convex ribs (3); the interior of the sleeve body (2) is hollow; the convex ribs (3) are fixedly arranged on the outer surface of the sleeve body (2); The inner mold (4) is made of a pipe, and the outer contour of the inner mold (4) corresponds to the contour of the hollow interior of the sleeve body (2); the inner mold (4) is arranged in the hollow interior of the sleeve body (2) and is detachably connected to the sleeve (1).

2. The forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel according to claim 1, characterized in that: The hollow inner contour shape of the cross section of the casing (1) is a curve shape, a polygon shape, or a combination of a curve shape and a polygon shape.

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