A heating plate for a high-frequency electromagnetic induction direct heating press

Abstract

The present invention discloses a heating plate for a high-frequency electromagnetic induction direct-heating press, which comprises a steel plate and high-temperature electromagnetic wires. A row of wire holes penetrating the steel plate are provided in the middle of the steel plate and parallel to the upper and lower surfaces. The wire holes are arranged equidistantly and uniformly, and the center distance between adjacent wire holes is 5 cm to 10 cm. When the center distance between adjacent wire holes is 5 cm to 8 cm, the high-temperature electromagnetic wires pass through the wire holes according to the principle that the current directions between adjacent holes are as consistent as possible. When the center distance between adjacent wire holes is 8 cm to 10 cm, the high-temperature electromagnetic wires pass through the wire holes according to the principle of passing through adjacent wire holes in sequence. Both ends of the high-temperature electromagnetic wires are connected to a high-frequency heating power supply and a controller. By setting the wire holes in this way, the present invention can, as much as possible, not change the self-structure of the hot-pressed steel plate, ensuring that its mechanical properties are not changed. At the same time, it can ensure that electromagnetic energy is fully absorbed by the steel plate and converted into heat energy, the overall steel plate is heated evenly, and it is beneficial to the transformation of the existing flat hot pressing plate.

Description

Technical Field

[0001] The present invention relates to the field of press equipment, and specifically to an environmentally friendly, efficient, and energy-saving high-frequency electromagnetic induction direct heating press heating plate. Background Art

[0002] Currently, hot presses are generally required in the production of wood-based panels (furniture). At present, the heat sources of hot presses all come from external heat sources of the presses, such as boilers (coal, oil, gas, etc.) that generate heat through combustion, and the heat energy is transferred to the hot pressing plates of the hot presses through steam or heat transfer oil for hot pressing and laminating of wood-based panels (furniture). As is well known, the process of energy transfer is accompanied by energy loss. At the same time, due to the influence of heat transfer efficiency, the heat efficiency is reduced, resulting in very low energy efficiency. Therefore, there is a great waste in terms of energy conservation and economy. With the increasing attention to environmental protection issues, highly polluting equipment such as coal-fired boilers has gradually disappeared from people's sight, and has been replaced by more environmentally friendly and convenient electric heating equipment. However, existing high-frequency heating methods all have the defect of damaging the mechanical structure of the hot pressing steel plate. Due to the large size of the steel plate, the existing method of setting wire grooves changes its original mechanical structure, and it is extremely easy to cause it to sag under gravity and deform under pressure impact. Summary of the Invention

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a high-frequency electromagnetic induction direct heating press heating plate, which does not change the structure of the hot pressing steel plate as much as possible to ensure that its mechanical properties are not changed, and at the same time ensures uniform heating of the overall steel plate.

[0004] The technical solution adopted by the present invention is as follows: A high-frequency electromagnetic induction direct heating press heating plate includes a steel plate and high-temperature electromagnetic wires. A row of wire holes penetrating the steel plate is provided in the middle of the steel plate, parallel to the upper and lower surfaces. The wire holes are arranged at equal intervals and evenly. The center distance between adjacent wire holes is 5 cm to 10 cm. When the center distance between adjacent wire holes is 5 cm to 8 cm, the high-temperature electromagnetic wires pass through the wire holes according to the principle that the current directions between adjacent holes are as consistent as possible. When the center distance between adjacent wire holes is 8 cm to 10 cm, the high-temperature electromagnetic wires pass through the wire holes according to the principle of passing through adjacent wire holes in sequence. The two ends of the high-temperature electromagnetic wires are connected to a high-frequency heating power supply and a controller.

[0005] Further, when the wire hole spacing is 5 cm to 8 cm, the principle for the high-temperature electromagnetic wires to pass through the wire holes is: after passing through the first wire hole in the forward direction, passing through the m-th wire hole in the reverse direction, then passing through the second wire hole in the forward direction, and then passing through the m + 1-th wire hole in the reverse direction, then passing through the third wire hole in the forward direction, and then passing through the m + 2-th wire hole in the reverse direction, and so on until passing through the m - 1-th wire hole in the forward direction, and then passing through the 2m-th wire hole in the reverse direction.

[0006] Further, the diameter of the wire holes is 14 to 26 mm.

[0007] Furthermore, the distances between the centers of the wire holes and the upper and lower sides of the steel plate are equal.

[0008] Furthermore, the direction of the wire holes is perpendicular to the length direction of the steel plate.

[0009] Furthermore, the steel plate is preferably a Q235 carbon steel plate, and the thickness is preferably 36 to 50 mm.

[0010] Furthermore, each wire hole can be passed through with a single or multiple high-temperature electromagnetic wires according to the area of ​​the heating plate and the high-frequency heating power requirements.

[0011] Furthermore, the steel plate is provided with non-metallic protective covers at both ends of the wire hole.

[0012] Furthermore, the heating plate may be composed of one or more steel plates, and the top of the uppermost steel plate and the lower end of the lowermost steel plate are separated from the base by insulating and heat-preserving materials.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The present invention sets the wire holes in a way that does not change the structure of the hot-pressed steel plate as much as possible, ensuring that its mechanical properties are not changed; at the same time, it can ensure that the electromagnetic energy is fully absorbed by the steel plate and converted into heat energy. The reasonable setting of the wire hole spacing and the uniform distribution of the coils ensure that the entire steel plate is heated uniformly;

[0015] (2) The coil of the present invention is simple to set up, which is conducive to the transformation of all existing flat hot pressing plates, and can effectively achieve the purpose of saving resources and reducing costs;

[0016] (3) The present invention utilizes the principle of magnetic field induced eddy current heating to enable the heating plate to generate eddy current heating under the action of a high-frequency electromagnetic field to achieve self-heating of the heating plate, thereby avoiding the heat energy loss caused by heat conduction. At the same time, it is an indirect heating method, eliminating safety hazards;

[0017] (4) The present invention opens the wire holes under the premise of fully considering the working conditions of the press, which does not change the overall structure of the steel plate, and ensures the pressure, impact strength, elastic modulus, cold and hot deformation and other requirements under the working conditions of the press. At the same time, the design of the wire holes reduces the mass of the steel plate while fully meeting the electromagnetic energy performance to ensure uniform heating. It can meet the working conditions requirements, has a simple structure, and reduces the mass of the metal plate to be heated, saving a lot of energy.

[0018] (5) Non-metallic protective covers are set on the edges of both sides of the wire hole to meet the working conditions and protect the coil;

[0019] (6) The present invention can effectively solve the environmental pollution problems brought about by various boilers used in existing sheet production enterprises. While using clean energy, electricity, it maximally saves energy, and its social benefits are remarkable. At the same time, the present invention can transform and upgrade existing traditional presses such as coal-fired, gas-fired steam and heat-conducting oil heating presses, thus saving a large amount of existing equipment and resources, and the economic and social benefits are obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic side view of the steel plate of the present invention.

[0021] Figure 2 It is a schematic winding method diagram of high-temperature electromagnetic wire when the center distance between adjacent wire holes is 8 cm to 10 cm.

[0022] Figure 3 It is a schematic winding method diagram of high-temperature electromagnetic wire when the center distance between adjacent wire holes is 5 cm to 8 cm.

[0023] Figure 4 It is another schematic winding method diagram of high-temperature electromagnetic wire when the center distance between adjacent wire holes is 5 cm to 8 cm. DETAILED DESCRIPTION OF THE INVENTION

[0024] To facilitate the understanding of the present invention, the following will describe the present invention more comprehensively and meticulously in conjunction with the accompanying drawings of the specification and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments.

[0025] As Figure 1 shown, a high-frequency electromagnetic induction direct heating press heating plate of the present invention includes a steel plate 1 and high-temperature electromagnetic wire. The steel plate 2 preferably uses a Q235 carbon steel plate, and the thickness is preferably 36-50 mm. In the middle of the steel plate 1, a row of wire holes 2 penetrating the steel plate is provided parallel to the upper and lower surfaces. The direction of the wire holes 2 is perpendicular to the length direction of the steel plate. The wire holes 2 are arranged at equal intervals and evenly. The diameter of the wire holes 2 is 14-26 mm. The distance from the center of the wire holes 2 to the upper and lower surfaces of the steel plate is equal, and the center distance between adjacent wire holes 2 is 5 cm to 10 cm. The high-temperature electromagnetic wire passes through the wire holes 2, and both ends of the high-temperature electromagnetic wire are connected to a high-frequency heating power supply and a controller.

[0026] As Figure 2 shown, when the center distance between adjacent wire holes is 8 cm to 10 cm, the high-temperature electromagnetic wire passes through the wire holes in accordance with the principle of passing through adjacent wire holes in sequence.

[0027] As Figure 3 、 Figure 4As shown, when the center distance between adjacent wire holes is 5 cm to 8 cm, the high-temperature electromagnetic wire passes through the wire holes according to the principle that the current directions between adjacent holes are as consistent as possible. Specifically, after passing through the first wire hole in the forward direction, it passes through the m-th wire hole in the reverse direction, then passes through the second wire hole in the forward direction, and then passes through the (m + 1)-th wire hole in the reverse direction. Then it passes through the third wire hole in the forward direction, and then passes through the (m + 2)-th wire hole in the reverse direction, and so on until it passes through the (m - 1)-th wire hole in the forward direction and then passes through the 2m-th wire hole in the reverse direction. Figure 3 In the winding method shown, the current directions of adjacent coils in the entire steel plate are opposite only at one place, and the current directions of the remaining adjacent coils are the same. Figure 4 In the winding method shown, the current directions of adjacent coils in the entire steel plate are opposite only at four places, and the current directions of the remaining adjacent coils are the same. Except Figure 3 , Figure 4 For the winding methods shown, according to the actual situation, other winding methods can be adopted based on this principle, and all are within the protection scope of the present invention.

[0028] Single or several high-temperature electromagnetic wires can be passed through each wire hole according to the size of the heating plate area and the requirements of high-frequency heating power. To protect the high-temperature electromagnetic coil, non-metallic protective covers are provided at both ends of the wire holes in the steel plate. The heating plate can be composed of 1 to several steel plates, and the top of the uppermost steel plate and the bottom of the lowermost steel plate are separated from the base by insulating and heat-insulating materials.

[0029] With the help of the teachings present in the foregoing specification and the related drawings, those skilled in the art to which the present invention pertains will envision many modifications and other embodiments of the present invention. Accordingly, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and that modifications and other embodiments are considered to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A heating plate for a high-frequency electromagnetic induction direct heating press, comprising a steel plate and high-temperature electromagnetic wires, characterized in that: A row of wire holes penetrating the steel plate is provided in the middle of the steel plate and parallel to the upper and lower surfaces. The wire holes are arranged evenly at equal intervals, and the center distance between adjacent wire holes is 5 cm to 8 cm. The high-temperature electromagnetic wire passes through the wire holes according to the principle that the current directions between adjacent holes are the same. The principle for the high-temperature electromagnetic wire to pass through the wire holes is as follows: after passing through the first wire hole in the forward direction, it passes through the m-th wire hole in the reverse direction, then passes through the second wire hole in the forward direction, and then passes through the (m + 1)-th wire hole in the reverse direction, and then passes through the third wire hole in the forward direction, and then passes through the (m + 2)-th wire hole in the reverse direction, and so on until it passes through the (m - 1)-th wire hole in the forward direction and then passes through the 2m-th wire hole in the reverse direction; both ends of the high-temperature electromagnetic wire are connected to a high-frequency heating power supply and a controller; the center distance of the wire holes from the upper and lower surfaces of the steel plate is equal, and the direction of the wire holes is perpendicular to the length direction of the steel plate.

2. The heating plate for a high-frequency electromagnetic induction direct heating press according to claim 1, characterized in that: The diameter of the wire holes is 14 to 26 mm.

3. The heating plate for a high-frequency electromagnetic induction direct heating press according to claim 1, characterized in that: The steel plate is made of Q235 carbon steel plate with a thickness of 36 to 50 mm.

4. The heating plate for a high-frequency electromagnetic induction direct heating press according to claim 1, characterized in that: In each wire hole, a single or several high-temperature electromagnetic wires are passed according to the size of the heating plate area and the requirements of the high-frequency heating power.

5. The heating plate for a high-frequency electromagnetic induction direct heating press according to any one of claims 1-4, characterized in that: Non-metallic protective covers are provided at both ends of the wire holes of the steel plate.

6. The heating plate for a high-frequency electromagnetic induction direct heating press according to any one of claims 1-4, characterized in that: The heating plate is composed of one to several steel plates, and the top of the uppermost steel plate and the bottom of the lowermost steel plate are separated from the base by insulating and heat-preserving materials.

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