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

Abstract

The invention relates to the technical field of constructional engineering, in particular to a forming mold for a rough surface of the inner wall of a prefabricated concrete hollow wallboard and application, and the advantages of flexibility of a sleeve film and rigidity of an inner mold are fully exerted through the supporting effect of a rigid inner mold by utilizing the characteristics that the sleeve film is easy to deform and convenient to demold. 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 invention relates to the technical field of building engineering, and in particular to a molding die for a rough inner surface of a precast concrete hollow wallboard and an application thereof. Background Art

[0002] Prefabricated concrete shear wall structure technology is developing towards the use of cast-in-place composite concrete shear wall, whose main advantages are good tolerance, controllable engineering structure quality, convenient and fast production and construction installation, and low overall construction cost. However, the problem of how to set a rough surface on the inner wall of the prefabricated concrete hollow wall panel has long restricted the promotion and application of cast-in-place composite concrete shear wall technology, because the lack of a rough surface on the concrete composite surface will reduce the structural performance to a certain extent.

[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 extend into the vertical holes of the upper prefabricated wall, and the vertical holes of the upper prefabricated wall are poured with post-poured concrete to achieve the lap 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 invention can avoid the use of special equipment to make holes by core pulling during the production of prefabricated walls, and the hole-making cost is low. At the same time, the lower pipe can be used to form a rough surface in the steel bar overlap area to enhance the steel bar overlap force transmission effect. There is no need to use high-pressure water washing to form a rough surface process during the production of prefabricated walls. The production process is small and the degree of roughness is not affected by the worker's operating level. However, the mold cost is high when it is placed in a disposable mold, and it is difficult to gain an advantage in technical competition.

[0005] The other type is reusable forming molds, such as the invention patent authorization specification CN202110534027.9, which discloses a core pulling mold, preparation method and application of a hollow concrete wall panel. The invention adopts a combined core pulling mold to pull the core in steps, reduce the core pulling resistance, and solve the problem that the hollow concrete wall panel is easily damaged during the core pulling process. At the same time, the combined core pulling mold realizes the formation of a keyway on the inner wall of the hollow hole of the concrete wall panel; the core pulling mold is used to form a keyway 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 has extremely high requirements for 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 which can form a keyway, that is, 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. Summary of the invention

[0007] The purpose of the present invention is to overcome the defects of the prior art and to propose a molding die and application 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 building structure construction and reduce costs.

[0008] To achieve the above object, the present invention adopts the following specific technical solutions:

[0009] The present invention 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, wherein 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 tubular material, and 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 shape of the cross section of the casing 1 is a curve shape or a polygon shape or a combination of a curve and a polygon shape.

[0012] The present invention provides an application of a rough surface of the inner wall of a precast concrete hollow wall panel, and the application of the above-mentioned molding die for the rough surface of the inner wall of a precast concrete hollow wall panel comprises the following steps:

[0013] S1. Preparing a forming mold for the rough inner surface of a precast concrete hollow wall panel

[0014] A forming mold for preparing the rough surface of the inner wall of a precast concrete hollow wall panel 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.

[0015] The inner mold 4 is made of a pipe, and the outer contour of the inner mold 4 corresponds to and matches the inner hollow contour of the sleeve body 2;

[0016] Insert the inner mold 4 into the hollow interior of the casing 1 to form a combined body, and obtain a molding mold for the rough surface of the inner wall of the precast concrete hollow wall panel;

[0017] S2. Preparation of the rough inner surface of the precast concrete hollow wall panel

[0018] When supporting the formwork of the precast concrete hollow wall panel, a forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel is set. 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 taken out to complete the preparation of the rough surface of the inner wall of the precast concrete hollow wall panel.

[0019] The present invention can achieve the following technical effects:

[0020] The present invention utilizes the characteristics of easy deformation and convenient demoulding of the rubber material of the casing film, and gives full play to the advantages of the flexibility of the casing film 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 casing film, the construction of the rough surface of the inner wall of the hollow hole of the precast concrete hollow wall panel is simplified, and the structural performance of the assembled concrete shear wall constructed by using the precast concrete hollow wall panel can be significantly improved. The construction efficiency is high and the cost is low, which is conducive to the promotion and application of the assembled concrete shear wall technology using post-cast concrete core filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional view of a mantle film with a rectangular cross section in the present invention;

[0022] Figure 2 It is a schematic longitudinal side elevation view of a mantle having a rectangular cross section in the present invention;

[0023] Figure 3 It is a schematic diagram of a horizontal section AA in the longitudinal direction of a mantle having a rectangular cross section in the present invention;

[0024] Figure 4 It is a schematic diagram of the vertical section BB in the longitudinal direction of the rectangular cross-section of the casing in the present invention;

[0025] Figure 5It is a schematic cross-sectional view of a mantle having a circular cross section in the present invention;

[0026] Figure 6 It is a schematic longitudinal side elevation view of a circular cross-section mantle in the present invention;

[0027] Figure 7 It is a schematic diagram of a horizontal section CC in the longitudinal direction of a circular cross-section mantle in the present invention;

[0028] Figure 8 It is a schematic diagram of the vertical section DD of the circular cross-section of the casing in the present invention;

[0029] Fig. 9 It is a schematic cross-sectional view of the inner mold and casing assembly of a rectangular cross section in the precast concrete hollow wall panel of the present invention;

[0030] Fig.10 It is a schematic cross-sectional view of a precast concrete hollow wall panel after the inner mold and casing assembly with a rectangular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0031] Fig.11 It is a longitudinal cross-sectional schematic diagram of the inner mold and casing assembly of a rectangular cross section in the precast concrete hollow wall panel of the present invention;

[0032] Fig.12 It is a schematic longitudinal section diagram of a precast concrete hollow wall panel after the inner mold and casing film assembly with a rectangular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0033] Fig.13 It is a schematic cross-sectional view of the circular cross-section inner mold and casing assembly in the precast concrete hollow wall panel of the present invention;

[0034] Fig.14 It is a schematic cross-sectional view of a precast concrete hollow wall panel after the inner mold and casing film assembly with a circular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0035] Fig.15 It is a longitudinal cross-sectional schematic diagram of the inner mold and casing assembly of the circular cross section in the precast concrete hollow wall panel of the present invention;

[0036] Fig.16 It is a longitudinal cross-sectional schematic diagram of a precast concrete hollow wall panel after the inner mold and casing film assembly with a circular cross section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel;

[0037] Fig.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 present invention;

[0038] Fig.18It is a schematic longitudinal section diagram in the plane of the precast concrete hollow wall panel after the inner mold and casing membrane assembly with a circular cross-section in the present invention is pulled out and demoulded from the precast concrete hollow wall panel.

[0039] Reference numerals include:

[0040] The casing film 1, the casing film body 2, the convex ribs 3, the inner mold 4, the precast concrete hollow wall panel 5, the hollow hole 6, and the rough surface 7. DETAILED DESCRIPTION

[0041] Hereinafter, 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, the detailed description thereof will not be repeated.

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0043] The embodiment of the present invention provides a molding die for roughening the inner wall of a precast concrete hollow wall panel, comprising a casing 1 and an inner mold 4.

[0044] The sleeve 1 is made of rubber material, such as Figures 1 to 8 As shown, it includes a sleeve body 2 and a convex rib 3;

[0045] The interior of the casing body 2 is hollow, and the hollow outer contour of the cross section is a curve or a polygon or a combination of a curve and a polygon;

[0046] The outer surface of the membrane body 2 is fixedly provided with a convex rib 3; the convex rib 3 protrudes from the outer surface of the membrane body 2, and the convex rib 3 is fixedly connected to the membrane body 2;

[0047] The inner mold 4 is made of tubular material, such as Fig. 9 , 11 As shown in FIGS. 13, 15 and 17, the outer contour of the cross section of the inner mold 4 is matched with the hollow contour of the cross section of the sleeve membrane body 2, and the inner mold 4 and the sleeve membrane 1 are detachably connected.

[0048] The embodiment of the present invention also provides an application of the rough surface of the inner wall of a prefabricated concrete hollow wall panel, such as Figures 9 to 18 As shown, the rough surface 7 is prepared on the inner wall of the hollow hole 6 of the precast concrete hollow wall panel 5 by using the above-mentioned forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel, which includes the following steps, and the following steps are performed in sequence:

[0049] Step 1: Prepare the forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel

[0050] like Figures 1 to 8 As shown, a sleeve 1 is made of rubber material, and the sleeve 1 includes a sleeve body 2 and convex ribs 3. The interior of the sleeve 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 sleeve body 2 is provided with convex ribs 3;

[0051] The inner mold 4 is prepared by using a pipe, 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 sleeve body 2; the inner mold 4 is inserted into the hollow of the sleeve 1 to form a combination, thereby obtaining a forming mold for the rough surface of the inner wall of the precast concrete hollow wall panel; the inner mold 4 and the sleeve 1 are detachably connected.

[0052] Step 2: Use a molding mold for the rough surface of the inner wall of the precast concrete hollow wall panel to prepare the rough surface of the inner wall of the precast concrete hollow wall panel.

[0053] like Figures 9 to 18 As shown, while the precast concrete hollow wall panel 5 is being molded, a molding 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.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0056] The above specific implementations of the present invention do not constitute a limitation on the protection scope 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 protection scope of the claims of the present invention.

Claims

1. A molding die for the rough inner surface of a precast concrete hollow wall panel, characterized in that: The invention comprises a sleeve film (1) and an inner mold (4); the sleeve film (1) is made of rubber material and comprises a sleeve film body (2) and convex ribs (3); the interior of the sleeve film body (2) is hollow; the convex ribs (3) are fixedly arranged on the outer surface of the sleeve film body (2); The inner mold (4) is made of a pipe, and the outer contour of the inner mold (4) corresponds to and matches the contour of the hollow interior of the sleeve body (2); the inner mold (4) is arranged inside 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 or a polygon shape or a combination of a curve and a polygon shape.

3. An application of the rough surface of the inner wall of a precast concrete hollow wall panel, using the forming mold of the rough surface of the inner wall of the precast concrete hollow wall panel according to claim 1 or 2, characterized in that: The steps include: S1. Preparing a forming mold for the rough inner surface of a precast concrete hollow wall panel The molding die for preparing the rough surface of the inner wall of the precast concrete hollow wall panel 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 and matches the inner hollow contour of the sleeve body (2); Inserting the inner mold (4) into the hollow interior of the casing (1) to form a combined body, thereby obtaining a molding mold for the rough surface of the inner wall of the precast concrete hollow wall panel; S2. Preparation of the rough inner surface of the precast concrete hollow wall panel When the precast concrete hollow wall panel is supported by a mold, a molding mold for the rough surface of the inner wall of the precast concrete hollow wall panel is set, and after the reinforcement is tied, concrete is poured and maintained, after the concrete reaches the demolding strength, the inner mold (4) is firstly pulled out, and then the sleeve film (1) is taken out, thereby completing the preparation of the rough surface of the inner wall of the precast concrete hollow wall panel.

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