A formwork for precast concrete components that is easy to demold

Abstract

The present invention discloses a formwork for precast concrete components that is easy to demold; it includes a steel formwork surface, a demolding air-permeable hole assembly, and a pneumatic pipeline; the demolding air-permeable hole assembly includes a hydrophobic air-permeable filter membrane, a fastening positioning nut, an external hexagonal hollow bolt, a fastening spring washer, a filter membrane fastening internal hexagonal nut, a filter membrane fixing internal hexagonal nut, and a filter membrane fastening spring washer; the outside of the filter membrane fixing internal hexagonal nut has an external thread of the filter membrane fixing internal hexagonal nut; the steel formwork surface and the fastening positioning nut are threadedly sleeved on the external hexagonal hollow bolt, and the filter membrane fastening internal hexagonal nut and the filter membrane fixing internal hexagonal nut are arranged inside the external hexagonal hollow bolt through the corresponding external threads. The present invention is used for the demolding of precast concrete components, has a simple structure, a high flatness of the formwork surface, good integrity, low demolding strength requirements, high demolding efficiency, the components are not easily damaged, the air-permeable assembly is easy to replace and maintain, has high durability and reliability, good economy, strong practicability, and good synchronism.

Description

Technical Field

[0001] The present invention relates to the technical field related to construction, and more specifically to a formwork for concrete precast components that is easy to demold. Background Art

[0002] Concrete precast components are building components prefabricated in a factory with concrete as the basic material, including beams, slabs, columns, and building decoration fittings, etc. Industrialized production requires a high turnover rate, so there are high requirements for the demolding quality and speed in the production process of concrete precast components. At present, there are also some demolding devices for concrete precast components with different structures.

[0003] After retrieval, it is found that the invention application with the application number CN202010110680.8 discloses a wet demolding device for assembled concrete precast components, including a mold outer frame, a mold bottom plate, and a fixing block; a first movable mold is arranged inside the mold outer frame of the device, and a second movable mold is arranged outside the fixing block. The first movable mold is composed of a first movable template, a movable hinge, a drum-shaped shaft, and a sliding shaft; the second movable mold is composed of a second movable template, a movable hinge, a drum-shaped shaft, and a sliding shaft. Through the adjustment of the drum-shaped shaft, the first movable mold expands outwards, and the second movable mold contracts inwards. Accordingly, the movable templates move along the track grooves on the mold bottom plate in a direction away from the concrete precast component perpendicular to the mold bottom plate, so that the movable templates are separated from the concrete precast component.

[0004] The invention with the application number CN202010664981.5 provides a demolding mechanism for concrete precast components and its use method. Among them, a demolding mechanism for concrete precast components relates to the technical field of concrete precast demolding, and specifically includes a frame structure, a demolding component, a material receiving component, a limit support component, and a rotating component. The frame structure includes a base fixed to the ground and a frame. The outer wall of the top of the base is fixedly installed with a rectangular array of legs, and the frame is fixedly installed on the outer wall of the top of the legs. The inner wall of the frame is rotatably connected to a fixing plate through a rotating shaft. The mold is fixedly installed on the outer wall of one side of the fixing plate. The rotating component is arranged on the outer wall of one side of the frame and is connected to one of the rotating shafts. The limit component is arranged on the outer walls of the two symmetrical sides of the frame, and the base is arranged on the outer wall of the other side of the fixing plate.

[0005] The invention of application number CN201811584900.X discloses a demoulding device for a concrete precast member with a ring-shaped column structure, including a demoulding device body. A motor frame is fixedly connected to the inner bottom surface of the demoulding device body. A motor is fixedly connected inside the motor frame. A guard plate is fixedly connected to the top surface of the motor frame. The top end of the guard plate is fixedly connected to the bottom surface of a partition plate. A limiting plate is fixedly connected to the plate surface of the partition plate. The driving shaft of the motor penetrates through the partition plate. Two buckle plates are fixedly connected to the end surface of the driving shaft of the motor. A rotating member is buckled between the two buckle plates. Telescopic slots are provided on both end surfaces of the rotating member.

[0006] However, in recent years, China's construction industry has increased its emphasis on prefabricated buildings. There are various types of precast component molds. For common concrete component molds, the standard requirements for prefabricated components are also more stringent. However, at this time, problems such as cost control of prefabricated components, manufacturing speed of precast parts, and appearance aesthetics also exist. How to quickly demould, demould early, and demould beautifully and accelerate the turnover of molds is one of the effective methods to solve this series of problems. Summary of the Invention

[0007] Therefore, to solve the above deficiencies, the present invention provides a formwork for concrete precast components that is easy to demould here; it includes a steel formwork surface, a hydrophobic and breathable filter membrane, a fastening positioning nut, an external hexagonal hollow bolt, a fastening spring washer, a filter membrane fastening internal hexagonal nut, a filter membrane fixing internal hexagonal nut, and a filter membrane fastening spring washer; the present invention is used for the demoulding of concrete precast components in engineering construction, with a simple overall structure, high and convenient demoulding efficiency, good economy, strong practicability, and good synchronism.

[0008] The present invention is implemented as follows. A formwork for concrete precast components that is easy to demould is constructed, characterized in that; it includes a steel formwork surface and a demoulding air vent assembly; the demoulding air vent assembly includes: a hydrophobic and breathable filter membrane, a fastening positioning nut, an external hexagonal hollow bolt, a fastening spring washer, a filter membrane fastening internal hexagonal nut, a filter membrane fixing internal hexagonal nut, and a filter membrane fastening spring washer;

[0009] The steel formwork surface has internal threads on the steel formwork surface;

[0010] The upper part of the external hexagonal hollow bolt is a filter membrane fixing air vent sleeve, the inner side of the lower end has an air inlet pipe thread interface, and the inside is a compressed air channel;

[0011] The outside of the filter membrane fastening internal hexagonal nut has external threads on the filter membrane fastening internal hexagonal nut, and the inside is a compressed air channel;

[0012] The outside of the filter membrane fixing internal hexagonal nut has external threads on the filter membrane fixing internal hexagonal nut, and the inside is a compressed air channel;

[0013] Among them, the steel formwork surface and the tight fixing nut are threaded through the outer hexagonal hollow bolt. The filter membrane tightening hexagon nut and the filter membrane fixing hexagon nut are arranged inside the outer hexagonal hollow bolt through corresponding external threads, and the hydrophobic and breathable filter membrane is embedded in the top of the filter membrane fixing hexagon nut.

[0014] For the formwork for concrete precast components that is easy to demold according to the present invention, it is characterized in that a fastening spring washer is arranged between the steel formwork surface and the tight fixing nut.

[0015] For the formwork for concrete precast components that is easy to demold according to the present invention, it is characterized in that a filter membrane tightening spring washer is arranged between the filter membrane tightening hexagon nut and the filter membrane fixing hexagon nut.

[0016] For the formwork for concrete precast components that is easy to demold according to the present invention, it is characterized in that the material of the hydrophobic and breathable filter membrane includes hydrophobic materials such as PVDF (polyvinylidene fluoride) and PTFE (polytetrafluoroethylene). The microscopic pore diameter of the filter membrane material is 0.05um - 50um, and the filter membrane thickness is 10um - 2mm.

[0017] For the formwork for concrete precast components that is easy to demold according to the present invention, it is characterized in that the distribution spacing of the demolding air vent components on the formwork surface is 0.1m - 2m. The distribution position avoids the formwork reinforcement rib plates, and the distribution is a regular or irregular dot array. The lower part of the air vent component is connected to the compressed air pipeline through the air inlet pipe thread interface.

[0018] For the formwork for concrete precast components that is easy to demold according to the present invention, it is characterized in that the assembly process of the demolding air vent component is as follows: Invert the filter membrane fixing air vent bushing, install the hydrophobic and breathable filter membrane, correct the position until the filter membrane is centered, use an inner hexagonal wrench to screw in the filter membrane fixing hexagon nut to tightly press and fix the filter membrane on the upper part of the bushing. Then, install the filter membrane tightening spring washer in sequence, screw in the filter membrane tightening hexagon nut, and then screw in the tight fixing nut on the filter membrane fixing air vent bushing and put on the fastening spring washer. Use a wrench to screw the assembled filter membrane fixing air vent bushing into the internal thread hole on the steel formwork surface until the upper surface of the filter membrane fixing air vent bushing is flush with the steel formwork surface, and then tighten the tight fixing nut to complete the assembly.

[0019] For the formwork for concrete precast components that is easy to demold according to the present invention, it is characterized in that the connection method of the demolding air vent component and the pipeline is as follows: The air inlet pipe thread interface is connected to the pneumatic pipeline. The pipelines are connected together through tees and cross joints. The inner diameter of the pipelines increases in sequence according to the order of the end pipeline, branch pipeline, and main pipeline. The end of the main pipeline is provided with a pneumatic quick connector for the pipeline system.

[0020] A mold table for concrete precast components that is easy to demold according to the present invention is characterized in that; the demolding process is as follows: remove the side mold. Before lifting the component, connect the pneumatic quick-connect joint of the pipeline system to allow compressed air to enter the demolding air permeable hole assembly through the air pipeline. Under the action of the pressure difference, the air passes through the hydrophobic air permeable filter membrane and enters the interface between the mold table and the concrete component, so that the concrete component is separated from the mold table or the negative pressure adsorption force between the concrete component and the surface of the bottom mold table is greatly reduced. Install a hook at the lifting point of the component and lift the component.

[0021] The present invention has the following advantages: The present invention provides a mold table for concrete precast components that is easy to demold here; it includes a steel mold table surface, a hydrophobic air permeable filter membrane, a fastening positioning nut, an external hexagonal hollow bolt, a fastening spring washer, a filter membrane fastening internal hexagonal nut, a filter membrane fixing internal hexagonal nut, and a filter membrane fastening spring washer; the present invention is used for the demolding of concrete precast components in engineering construction, with a simple overall structure, high and convenient demolding efficiency, good economy, strong practicability, and good synchronism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall assembly drawing of the present invention;

[0023] Figure 2 is the schematic diagram of the steel mold table surface in the present invention;

[0024] Figures 3 - 4 is the schematic diagram of the external hexagonal hollow bolt in the present invention;

[0025] Figures 5 - 6 is the schematic diagram of the fastening positioning nut in the present invention;

[0026] Figures 7 - 8 is the schematic diagram of the fastening spring washer in the present invention;

[0027] Figure 9 is the assembly drawing of the hydrophobic air permeable filter membrane, the filter membrane fastening internal hexagonal nut, and the filter membrane fixing internal hexagonal nut in the present invention;

[0028] Figure 10 is the bottom view of the filter membrane fastening internal hexagonal nut in the present invention;

[0029] Figure 11 is the schematic diagram of the layout of demolding air permeable holes with a spacing of 0.5 m for a 4m×12m mold table;

[0030] Figure 12 is the schematic diagram of the layout of demolding air permeable holes with a spacing of 1 m for a 4m×12m mold table;

[0031] Figure 13 is the schematic diagram of the layout of demolding air permeable holes with a spacing of 1 m for a 4m×9m mold table;

[0032] Figure 14It is a schematic diagram of the arrangement of demoulding ventilation holes with a formwork spacing of 0.5 m for a 4 m × 9 m formwork.

[0033] Among them: steel formwork surface 1, hydrophobic breathable filter membrane 2, tight fixing nut 3, external hexagonal hollow bolt 4, fastening spring washer 5, filter membrane fastening internal hexagonal nut 6, filter membrane fixing internal hexagonal nut 7, filter membrane fastening spring washer 8, internal thread of steel formwork surface 9, filter membrane fixing ventilation bushing 10, air inlet pipe thread interface 11 on the inner side of the lower end, compressed air channel 12, external thread of filter membrane fastening internal hexagonal nut 13, compressed air channel 14, external thread of filter membrane fixing internal hexagonal nut 15, compressed air channel 16. Specific implementation mode

[0034] The following will combine the attached Figures 1 - 14 The present invention will be described in detail below. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. The present invention provides a formwork for concrete precast components that is easy to demould through improvement. As shown in the figure, it can be implemented in the following manner; it includes a steel formwork surface 1 and a demoulding ventilation hole assembly; the demoulding ventilation hole assembly includes: a hydrophobic breathable filter membrane 2, a tight fixing nut 3, an external hexagonal hollow bolt 4, a fastening spring washer 5, a filter membrane fastening internal hexagonal nut 6, a filter membrane fixing internal hexagonal nut 7, and a filter membrane fastening spring washer 8;

[0035] The steel formwork surface 1 has an internal thread of the steel formwork surface 9;

[0036] The upper part of the external hexagonal hollow bolt 4 is a filter membrane fixing ventilation bushing 10, the inner side of the lower end has an air inlet pipe thread interface 11, and the inside is a compressed air channel 12;

[0037] The outside of the filter membrane fastening internal hexagonal nut 6 has an external thread of the filter membrane fastening internal hexagonal nut 13, and the inside is a compressed air channel 14;

[0038] The outside of the filter membrane fixing internal hexagonal nut 7 has an external thread of the filter membrane fixing internal hexagonal nut 15, and the inside is a compressed air channel 16;

[0039] Among them, the steel formwork surface 1 and the tight fixing nut 3 are threaded through the external hexagonal hollow bolt 4, the filter membrane fastening internal hexagonal nut 6 and the filter membrane fixing internal hexagonal nut 7 are arranged inside the external hexagonal hollow bolt 4 through the corresponding external threads, and the hydrophobic breathable filter membrane 2 is embedded in the top of the filter membrane fixing internal hexagonal nut 7.

[0040] When the prefabricated concrete component that is easy to demould is implemented using a mold table, a fastening spring washer 5 is arranged between the steel mold table surface 1 and the fastening positioning nut 3.

[0041] When the precast concrete component that is easy to demould is implemented using a formwork platform, a filter membrane fastening spring washer 8 is provided between the filter membrane fastening inner hexagonal nut 6 and the filter membrane fixing inner hexagonal nut 7.

[0042] When the precast concrete component that is easy to demould is implemented using a mold platform, the hydrophobic and breathable filter membrane 2 is made of PVDF (polyvinylidene fluoride) and PTFE (polytetrafluoroethylene) hydrophobic materials, the microscopic pore size of the filter membrane material is 0.05um-50um, and the filter membrane thickness is 10um-2mm.

[0043] When the precast concrete component that is easy to demould is implemented using a formwork table, the demoulding air hole components are distributed at a spacing of 0.1m-2m on the formwork table surface, and the distribution position avoids the formwork table reinforcement ribs and is distributed in a regular or irregular point array. The lower part of the air permeable component is connected to the compressed air pipeline through an air inlet pipe threaded interface.

[0044] The assembly process of the demoulding air hole assembly is as follows: invert the filter membrane fixing air sleeve 10, install the hydrophobic air-permeable filter membrane 2, correct the position until the filter membrane is centered, use an inner hexagonal wrench to screw in the filter membrane fixing inner hexagonal nut 7, and fix the filter membrane tightly on the upper part of the sleeve, install the filter membrane fastening spring washer 8 in turn, screw in the filter membrane fastening inner hexagonal nut 6, and then screw in the fastening nut 3 on the filter membrane fixing air sleeve 10, and insert the fastening spring washer 5; screw the assembled filter membrane fixing air sleeve 10 into the internal threaded hole 9 on the steel mold table 1 with a wrench until the upper surface of the filter membrane fixing air sleeve is flush with the steel mold table, tighten the fastening nut 3, and the assembly is completed.

[0045] The connection method of the demoulding air vent assembly and the pipeline is: the air inlet pipe threaded interface 11 is connected to the pneumatic pipeline, the pipelines are connected together through a tee and a cross, the inner diameter of the pipeline increases in the order of the terminal pipeline, the branch pipeline, and the main pipeline, and the end of the main pipeline is provided with a pneumatic quick-connect connector of the pipeline system.

[0046] The demoulding process is as follows: Remove the edge mould. Before lifting the component, connect the pneumatic quick-connect joint of the pipeline system to allow compressed air to enter the demoulding air-permeable hole assembly through the air pipeline. Under the action of the pressure difference, the air passes through the hydrophobic air-permeable filter membrane and enters the interface between the mould table and the concrete component, enabling the concrete component to be separated from the mould table or significantly reducing the negative pressure adsorption force between the concrete component and the surface of the bottom mould table. Install a hook at the lifting point of the component and then lift the component. The present invention has the following advantages: The present invention provides herein a mould table for concrete precast components that is easy to demould; it includes a steel mould table surface 1 and a demoulding air-permeable hole assembly; the demoulding air-permeable hole assembly includes: a hydrophobic air-permeable filter membrane 2, a fastening positioning nut 3, an external hexagon hollow bolt 4, a fastening spring washer 5, a filter membrane fastening internal hexagon nut 6, a filter membrane fixing internal hexagon nut 7, and a filter membrane fastening spring washer 8; The present invention is used for the demoulding of concrete precast components in engineering construction, with a simple structure, high flatness of the mould table surface, good integrity, low demoulding strength requirements, high demoulding efficiency, the components are not easily damaged, the air-permeable assembly is easy to replace and maintain, with high durability and reliability, good economy, strong practicability, and good synchronism.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A formwork for precast concrete components that is easy to demold, characterized in that; it includes a steel formwork surface (1) and a demolding air-permeable hole assembly; the demolding air-permeable hole assembly includes: a hydrophobic air-permeable filter membrane (2), a fastening positioning nut (3), an external hexagonal hollow bolt (4), a fastening spring washer (5), a filter membrane fastening internal hexagonal nut (6), a filter membrane fixing internal hexagonal nut (7), and a filter membrane fastening spring washer (8); the steel formwork surface (1) has internal threads (9) on the steel formwork surface; the upper part of the external hexagonal hollow bolt (4) is a filter membrane fixing air-permeable bushing (10), the inner side of the lower end has an air inlet pipe thread interface (11), and the inside is a compressed air channel (12); the outside of the filter membrane fastening internal hexagonal nut (6) has an external thread (13) of the filter membrane fastening internal hexagonal nut, and the inside is a compressed air channel (14); the outside of the filter membrane fixing internal hexagonal nut (7) has an external thread (15) of the filter membrane fixing internal hexagonal nut, and the inside is a compressed air channel (16); wherein, the steel formwork surface (1) and the fastening positioning nut (3) are threaded through the external hexagonal hollow bolt (4), the filter membrane fastening internal hexagonal nut (6) and the filter membrane fixing internal hexagonal nut (7) are arranged inside the external hexagonal hollow bolt (4) through corresponding external threads, and the hydrophobic air-permeable filter membrane (2) is embedded in the top of the filter membrane fixing internal hexagonal nut (7); a fastening spring washer (5) is arranged between the steel formwork surface (1) and the fastening positioning nut (3); a filter membrane fastening spring washer (8) is arranged between the filter membrane fastening internal hexagonal nut (6) and the filter membrane fixing internal hexagonal nut (7); the distribution spacing of the demolding air-permeable hole assembly on the formwork surface is 0.1m - 2m, the distribution position avoids the formwork stiffening rib plate, the distribution is a regular or irregular point array, and the lower part of the air-permeable assembly is connected to the compressed air pipeline through the air inlet pipe thread interface.

2. The formwork for precast concrete components that is easy to demold according to claim 1, characterized in that; the material of the hydrophobic air-permeable filter membrane (2) includes polyvinylidene fluoride and polytetrafluoroethylene hydrophobic materials, the microscopic pore diameter of the filter membrane material is 0.05um - 50um, and the filter membrane thickness is 10um - 2mm.

3. The formwork for precast concrete components that is easy to demold according to claim 1, characterized in that; the assembly process of the demolding air-permeable hole assembly is as follows: invert the filter membrane fixing air-permeable bushing (10), install the hydrophobic air-permeable filter membrane (2), correct the position until the filter membrane is centered, use an internal hexagonal wrench to screw in the filter membrane fixing internal hexagonal nut (7) to tightly press and fix the filter membrane on the upper part of the bushing, sequentially install the filter membrane fastening spring washer (8), screw in the filter membrane fastening internal hexagonal nut (6), and then screw in the fastening positioning nut (3) on the filter membrane fixing air-permeable bushing (10), and put on the fastening spring washer (5); screw the assembled filter membrane fixing air-permeable bushing (10) into the internal thread hole (9) on the steel formwork surface (1) with a wrench until the upper surface of the filter membrane fixing air-permeable bushing is flush with the steel formwork surface, and tighten the fastening positioning nut (3) to complete the assembly.

4. The formwork for precast concrete components that is easy to demold according to claim 1, characterized in that; The connection method of the demoulding air vent assembly and the pipeline is as follows: the threaded interface (11) of the air inlet pipe is connected to the pneumatic pipeline, and the pipelines are connected together through tees and four-ways. The inner diameter of the pipeline increases in sequence according to the order of the end pipeline, the branch pipeline, and the main pipeline. A pneumatic quick connector of the pipeline system is provided at the end of the main pipeline.

5. The formwork for precast concrete members that is easy to demould according to claim 1, characterized in that; The demoulding process is as follows: Remove the side formwork. Before lifting the member, connect the pneumatic quick connector of the pipeline system to allow compressed air to enter the demoulding air vent assembly through the air pipeline. Under the action of the pressure difference, the air penetrates through the hydrophobic breathable filter membrane and enters the interface between the formwork and the concrete member, so that the concrete member is separated from the formwork or the negative pressure adsorption force between the concrete member and the surface of the bottom formwork is greatly reduced. Install a hook at the lifting point of the member and lift the member.

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