An auxiliary device for concrete demoulding

Abstract

The present invention relates to an auxiliary device for concrete demoulding, which includes a panel, a forward excitation coil, a flyback coil, a bottom plate, a drive circuit, a controller, and a power supply module. The forward excitation coil and the inertial sheet are pasted on the back of the panel and are distributed in a checkerboard array. The flyback coil is located on the bottom plate and is distributed in a checkerboard array, corresponding to the forward excitation coil one by one. The outgoing wires of each unit in the arrays of the forward excitation coil and the flyback coil are connected to the drive circuit and then to the controller, and the controller is electrically connected to the power supply module. By preventing the adhesion of concrete to the panel, the present invention reduces the demoulding resistance, alleviates the labor of workers, protects the surface of the concrete, and avoids the harmful effects of oily demoulding agents on the concrete, such as low surface rebound value, etc.

Description

Technical Field

[0001] The present invention relates to a concrete demoulding device, especially an auxiliary device for concrete demoulding. Background Art

[0002] Currently, mechanical external force is used to separate the formwork from the concrete during concrete demoulding, such as using a crowbar or a hydraulic cylinder to jack it out. Even if a demoulding agent is sprayed on the formwork, in some special working conditions, such as in the concrete pouring construction of underwater components such as diaphragm walls, the pulling force is very large after the concrete adheres to the joint box (equivalent to the formwork), and there is a lack of efficient and simple auxiliary tools for demolition.

[0003] How to prevent the formwork surface and the concrete surface from sticking during the concrete pouring process and make the formwork removal easier is a technical problem to be solved urgently. Summary of the Invention

[0004] To solve the above technical problems, the purpose of the present invention is to provide an auxiliary device for concrete demoulding, which can prevent the concrete from sticking to the formwork during the concrete pouring construction and make the formwork removal easier.

[0005] To achieve the above purpose, the technical solution of the present invention is: an auxiliary device for concrete demoulding, including a panel, a forward excitation coil, a flyback coil, a bottom plate, a drive circuit, a controller, and a power supply module. The forward excitation coil and the inertial piece are pasted on the back of the panel and distributed in a checkerboard array. The flyback coil is located on the bottom plate and distributed in a checkerboard array, corresponding to the forward excitation coil one by one. The leads of each unit in the arrays of the forward excitation coil and the flyback coil are connected to the drive circuit and then to the controller. The controller is electrically connected to the power supply module.

[0006] Further, the material of the panel is cold-rolled galvanized steel sheet with a thickness of 0.5 - 1.5 mm and a smooth surface.

[0007] Further, the four sides of one side of the bottom plate are fixed to the panel, and the other side is in contact with and fixed to the formwork, or serves as the main body structure of the formwork.

[0008] Further, the forward excitation coil is formed by spirally winding a flat pure copper wire into a flat disk-shaped structure, and an inertial piece is connected to its center.

[0009] Further, the material of the inertial piece is metal, and its shape is a circular sheet.

[0010] Further, the flyback coil is formed by spirally winding a flat pure copper wire into a flat disk-shaped structure.

[0011] Furthermore, the power supply module includes a rechargeable battery pack and an external power supply connector. The rechargeable battery is used under the condition of no trailing wire, and the external power supply connector is used under the condition of trailing wire.

[0012] Furthermore, the controller uses a single-chip microcomputer to control the circuits of the forward excitation coil array and the flyback coil array respectively, and sends alternating current signals with opposite phases or opposite time sequences to the circuits of the forward excitation coil array and the flyback coil array at the same time.

[0013] Furthermore, after receiving the electric signals, the forward excitation coil and the flyback coil generate opposite magnetic fields, and the panel moves under the drive of the forward excitation coil. By controlling the electric signals of the array, the panel generates a waveform vibration from bottom to top to produce a high-frequency micro-amplitude, so that it cannot adhere to the panel during the initial setting process of the concrete.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) By preventing the adhesion of concrete to the panel, the demoulding resistance is reduced, the labor of personnel is reduced, and the surface of the concrete is protected.

[0016] (2) It avoids the harmful effects of especially oily demoulding agents on concrete, such as low surface rebound value, etc. Description of the Drawings

[0017] Figure 1 is a schematic cross-sectional view of the auxiliary device for concrete demoulding of the present invention;

[0018] Figure 2 is a schematic plan view of the auxiliary device for concrete demoulding of the present invention. Detailed Embodiments

[0019] The following specifically describes the implementation manners of the present invention in conjunction with the drawings and embodiments.

[0020] As Figure 1 、 2 shown, the auxiliary device for concrete demoulding of the present invention includes: a panel 1, a forward excitation coil 2, a flyback coil 3, an inertia piece 4, a bottom plate 5, a drive circuit 6, a controller 7, and a power supply module 8.

[0021] As Figure 1 、 2 shown, the forward excitation coil 2 and the inertia piece 4 are pasted on the back of the panel 1 and are distributed in a checkerboard array. The flyback coil 3 is located on the bottom plate 5 and is distributed in a checkerboard array, corresponding to the forward excitation coil 2 one by one. The outgoing wires of each unit in the arrays of the forward excitation coil 2 and the flyback coil 3 are connected to the drive circuit 6 and then to the controller 7. The power supply module 8 is electrically connected to the controller 7.

[0022] The panel 1 is the surface in contact with the concrete. The material is preferably a metal sheet such as cold-rolled galvanized steel sheet, and the thickness is preferably 0.5 - 1.5 mm. Its surface is smooth.

[0023] The four sides around one side of the bottom plate 5 are fixed to the panel, and the other side is in contact and fixed with the formwork, or serves as the main body structure of the formwork.

[0024] The forward excitation coil 2 is formed by spirally winding a flat pure copper wire into a flat spiral disc structure, and an inertia piece 4 is connected to its center. The material of the inertia piece 4 is metal (such as lead, etc.), and its shape is a circular sheet.

[0025] The flyback coil 3 is formed by spirally winding a flat pure copper wire into a flat spiral disc structure.

[0026] The power supply module 8 includes a rechargeable battery pack for use in the non-tethered working condition; it includes an external power supply connector for use in the tethered working condition.

[0027] The controller 7 uses a single-chip microcomputer to control the circuits of the arrays of the forward excitation coil 2 and the flyback coil 3 respectively. At the same time, it sends alternating current signals with opposite phases or opposite time sequences to these two components.

[0028] After the forward excitation coil 2 and the flyback coil 3 receive the electrical signals, opposite magnetic fields are generated, and the panel 1 moves driven by the forward excitation coil 2. By controlling the electrical signals of the array, the panel 1 generates a waveform vibration from bottom to top (high frequency and small amplitude), making it impossible for the concrete to adhere to the panel during the initial setting process of the concrete.

[0029] During normal formwork construction operation, after or during the concrete pouring, at the time point approaching the initial setting, turn on the auxiliary device for concrete demoulding of the present invention. The controller 7 sends electrical signals with opposite time sequences / opposite potentials to the arrays of the forward excitation coil 2 and the flyback coil 3 respectively according to the pre-programmed procedure or manual control. The forward excitation coil 2 and the flyback coil 3 respectively generate magnetic fields with different magnetic poles. When the magnetic poles between them are the same, the forward excitation coil 2 moves outward; when the magnetic poles between them are opposite, the forward excitation coil 2 moves inward. Under the control of the electrical signals, the directions of the magnetic poles and the magnitudes of the magnetic fluxes generated by the forward excitation coil 2 and the flyback coil 3 are changed in time sequence, so that the forward excitation coil 2 generates an alternating motion, driving the panel 1 to generate a fluctuating vibration. This waveform vibration destroys the adhesion between the concrete and the panel 1 during the initial setting process of the concrete, making it impossible for the concrete to adhere to the panel 1, greatly reducing the demoulding resistance. At the same time, by changing the time division control of the alternating current signals between different rows (or columns) in the coil array, such as sine wave form control, the entire array generates an approximate wave-like motion, further enhancing the effect of destroying the adhesion between the concrete and the panel 1.

Claims

1. An auxiliary device for concrete demoulding, characterized in that: It includes a panel, a forward excitation coil, a flyback coil, a bottom plate, a drive circuit, a controller, and a power supply module. The forward excitation coil and the inertial sheet are pasted on the back of the panel and are distributed in a checkerboard array. The flyback coil is located on the bottom plate and is distributed in a checkerboard array, corresponding one by one to the forward excitation coil. The leads of each unit in the arrays of the forward excitation coil and the flyback coil are connected to the drive circuit and then to the controller, and the controller is electrically connected to the power supply module.

2. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The material of the panel is cold-rolled galvanized steel sheet with a thickness of 0.5 - 1.5 mm and its surface is smooth.

3. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The four sides around one side of the bottom plate are fixed to the panel, and the other side is in contact with and fixed to the formwork or serves as the main body structure of the formwork.

4. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The forward excitation coil is made of flat pure copper wire in a spiral winding form, forming a flat disk-shaped structure, and an inertial sheet is connected to its center.

5. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The material of the inertial sheet is metal and its shape is a circular sheet.

6. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The flyback coil is made of flat pure copper wire in a spiral winding form, forming a flat disk-shaped structure.

7. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The power supply module includes a rechargeable battery pack and an external power supply connector. The rechargeable battery is used in the non-tethered working condition, and the external power supply connector is used in the tethered working condition.

8. The auxiliary device for concrete demoulding according to claim 1, characterized in that: The controller uses a single-chip microcomputer to control the circuits of the arrays of the forward excitation coil and the flyback coil respectively, and simultaneously sends alternating current signals with opposite phases or opposite time sequences to the circuits of the arrays of the forward excitation coil and the flyback coil.

9. The auxiliary device for concrete demoulding according to claim 8, characterized in that: After receiving the electrical signals, the forward excitation coil and the flyback coil generate opposite magnetic fields. The panel moves driven by the forward excitation coil. By controlling the electrical signals of the array, the panel generates a waveform vibration from bottom to top, generating a high-frequency micro-amplitude, so that it cannot adhere to the panel during the initial setting process of the concrete.

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