Furnace bottom structure and furnace body

Abstract

The present invention discloses a furnace bottom structure and a furnace body, comprising one or more layers of refractory layers, a plurality of support frames fixed to the uppermost layers of the one or more layers of refractory layers, and electric heating elements, wherein the electric heating elements are arranged on the portion of the upper surface of the refractory layers excluding the support frames, and a plurality of furnace bottom cover plates fixed to the support frames, wherein the furnace bottom cover plates, the side surfaces of the adjacent support frames and the upper surfaces of the electric heating elements form a heat dissipation cavity. The present invention has a simple structure and, compared with the prior art, can quickly transfer the heat of the electric heating elements to the furnace, reduce heat concentration on the surface of the electric heating elements, reduce the surface load of the electric heating elements, and thereby increase the service life of the electric heating elements to a certain extent.

Description

Technical Field

[0001] The present invention relates to the field of electric furnaces, in particular to a furnace bottom structure and a furnace body. Background Art

[0002] In the prior art, to reduce energy waste, efforts are generally made to increase the thermal insulation and heat-insulating properties of the furnace bottom as much as possible. For example, Chinese utility model patent application number CN201020173677.2 discloses a furnace bottom structure comprising a brick layer, wherein the brick layer is constructed of bricks, and the bricks of the brick layer are arranged in at least two layers, with the bricks between at least two adjacent layers being staggered. The present invention provides a furnace bottom structure that improves the sealing performance of the equipment by staggering the bricks of adjacent layers to stagger the joints between adjacent layers. This improves the reliability of the equipment and extends the maintenance cycle and service life of the equipment.

[0003] However, in order to improve the utilization efficiency of electric energy in the machinery and metallurgical industries, a thicker bottom cover is used on the bottom of the electric heating furnace to bear the weight of the workpiece on the one hand and to keep the bottom warm on the other hand. However, this method not only consumes excess electric energy each time heating is carried out, but also makes the heat dissipation efficiency of the furnace bottom low and the heat cannot be transferred out in time, thereby increasing the overall load of the electric heating element, making the electric heating element prone to overburning and reducing the service life of the electric heating element. Summary of the Invention

[0004] The object of the present invention is to provide a furnace bottom structure, which can effectively improve the heat dissipation efficiency of the furnace bottom part to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A furnace bottom structure, comprising:

[0007] One or more layers of refractory material;

[0008] Several support frames fixed to the uppermost layer of one or more refractory layers;

[0009] an electric heating element, the electric heating element being arranged on the upper surface of the refractory layer excluding the support frame, and

[0010] A plurality of furnace bottom cover plates are fixed on the support frame, and the furnace bottom cover plates, the side surfaces of the adjacent support frames and the upper surface of the electric heating element form a heat dissipation cavity.

[0011] As a further solution of the present invention: the upper surfaces of several of the support frames are fixedly connected with pads for auxiliary support, the upper surfaces of several of the pads are flush, and the contact surface between the pads and the support frames is smaller than the upper surface of the support frames.

[0012] As a further solution of the present invention: the thickness of the furnace bottom cover is set to 3-5 mm.

[0013] As a further solution of the present invention: the furnace bottom cover plate includes a horizontal cover plate and a vertical cover plate alternately installed on the support frame, and folded edges are formed on both sides of the horizontal cover plate. A heat conduction cavity is formed between the side edges of any adjacent horizontal cover plates and vertical cover plates and above the surface of the vertical cover plate, and the heat conduction cavity connects the heat dissipation cavity with the space inside the furnace.

[0014] As a further solution of the present invention: the heat-conducting cavity includes a heat-conducting gap and a heat transfer port, the heat-conducting gap is surrounded by the outer side surface of the vertical cover plate, the outer side surface of the horizontal cover plate and the folded edge of the horizontal cover plate, and the heat transfer port is located above the vertical cover plate. The heat energy generated by the electric heating element is conducted to the space inside the furnace through the heat dissipation cavity, the heat-conducting gap and the heat transfer port in sequence.

[0015] As a further solution of the present invention: the horizontal cover plate and the vertical cover plate are both U-shaped.

[0016] A furnace body comprises the above-mentioned furnace bottom structure.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a novel structure, which can quickly transfer the heat of the electric heating element to the furnace, reduce the heat concentration on the surface of the electric heating element, reduce the surface load of the electric heating element, and thus increase the service life of the electric heating element to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a front cross-sectional structure of a furnace bottom structure;

[0019] Figure 2 It is a schematic diagram of a side cross-sectional structure of a furnace bottom structure;

[0020] Figure 3 for Figure 2 Schematic diagram of point A;

[0021] Figure 4 A top view of a furnace bottom structure;

[0022] In the figure: 1-refractory layer, 2-support frame, 3-pad, 4-heat conduction gap, 5-heat dissipation cavity, 6-furnace bottom cover, 61-transverse cover, 610-folded edge, 62-vertical cover, 7-electric heating element, 8-heat transfer port. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, the present invention provides a technical solution, a furnace bottom structure and a furnace body, comprising:

[0025] The furnace bottom includes a refractory layer 1 for supporting and insulating the furnace, a support frame 2 for supporting the workpiece, an electric heating element 7 for providing a heat source for the furnace bottom, and a furnace bottom cover 6 for insulating the furnace bottom from the external environment and insulating the furnace bottom.

[0026] The refractory layer is also called the refractory insulation layer of the furnace bottom, which can be set to one layer or multiple layers. The more layers, the higher the insulation performance. During the manufacture and use of the furnace bottom structure, the number of layers of the refractory layer can be selected and manufactured according to actual application needs.

[0027] The support frame 2 is arranged at the uppermost end of the refractory layer 1. The support frame mainly plays the role of bearing the weight of the workpiece, the upper pad iron and the furnace bottom cover plate. A refractory castable prefabricated block can be used. It is a special-shaped prefabricated block formed by casting high-strength castable and then sintering at high temperature. The shape can be customized according to different furnace bottom structure specifications. It has strong load-bearing capacity and high temperature resistance. In the prior art, the workpiece is supported by the furnace bottom cover plate 6. The furnace bottom cover plate needs to meet a certain load-bearing strength, so its thickness is increased accordingly, resulting in the heat in the furnace bottom being dissipated efficiently through the furnace bottom cover plate. The present invention uses a support frame to replace the furnace bottom cover plate to support and bear the workpiece, so that the furnace bottom cover plate 6 does not bear the weight of the workpiece, so that its thickness can be reduced accordingly, and the heat dissipation efficiency of the furnace bottom through the furnace bottom cover plate is accelerated, thereby reducing the surface load of the electric heating element and increasing the service life of the corresponding electric furnace to a certain extent. At the same time, the thickness of the furnace bottom cover plate is reduced, which saves the heat energy absorbed by the furnace bottom cover plate each time the electric furnace is used.

[0028] The electric heating element 7 is arranged on the upper surface of the refractory layer 1 to heat the furnace bottom as a whole and provide heat for the heated parts at the upper end of the furnace bottom. The plurality of furnace bottom cover plates 6 are fixed on the support frame 2. Figure 2-3As shown, under the supporting effect of the support frame on the furnace bottom cover plate 6, a heat dissipation cavity 5 is formed between the furnace bottom cover plate 6 and the electric heating element 7, which can disperse the heat generated by the electric heating element, reduce the concentration of heat, and thus reduce the load of the electric heating element. At the same time, through the alternating arrangement of the U-shaped horizontal cover plates and the vertical cover plates on the support frame, a heat conduction cavity is formed between the side edges of the horizontal cover plates and the vertical cover plates and above the surface of the vertical cover plates. The heat conduction cavity connects the heat dissipation cavity 5 with the space inside the furnace. At the same time, the heat conduction cavity includes a heat conduction gap 4 and a heat transfer port 8. The heat conduction gap 4 is surrounded by the outer side surface of the vertical cover plate, the outer side surface of the horizontal cover plate and the folded edge of the horizontal cover plate. The heat transfer port 8 is located above the vertical cover plate. The heat energy generated by the electric heating element 7 is sequentially conducted to the space inside the furnace through the heat dissipation cavity 5, the heat conduction gap 4, and the heat transfer port 8, further accelerating the heat transfer of the electric heating element and reducing the load of the electric heating element. At the same time, this method makes the dissipated heat evenly distributed, thereby improving the temperature uniformity in the furnace.

[0029] Folding edges 610 are formed on both sides of the transverse cover plate 61. The folding edges 610 on both sides can guide the direction of heat dissipation on the one hand, and on the other hand can block external oxide scale and play a certain protective role on the electric heating element below.

[0030] The upper surface of the support frame 2 is fixedly connected with a pad 3 for auxiliary support of the processing workpiece. The upper surfaces of several pads are flush with each other. The contact surface between the pad and the support frame is smaller than the upper surface of the support frame. The thickness of the furnace bottom cover plate 6 is set to 3mm. Compared with the thickness of the furnace bottom cover plate used for bearing weight in the prior art, the present invention can reduce the thickness of the furnace bottom cover plate in the prior art accordingly, thereby reducing the absorption of heat generated by the electric heating element by the furnace bottom cover plate, and accelerating the rate of heat dissipation and transfer generated by the electric heating element.

[0031] The horizontal cover plate and the vertical cover plate are both U-shaped. Through this shape, the shapes of the horizontal cover plate and the vertical cover plate can cooperate with each other, forming a bending cavity between the two, which can control the direction of heat dissipation. At the same time, the heat can be dissipated more evenly, thereby improving the uniformity of the furnace temperature.

[0032] The present invention has a novel structure and stable operation. When the present invention is in use, the electric heating element generates heat, which is transferred through the medium (contact object, air, etc.). Figure 2-3 Under the action of the alternating arrangement between the two horizontal cover plates and the vertical cover plates, the heat of the electric heating element is dissipated to the furnace through the heat dissipation cavity 5, the heat conduction gap 4 and the heat transfer port 8. Compared with the existing technology, the present invention can quickly transfer the heat of the electric heating element to the furnace, reduce the heat concentration on the surface of the electric heating element, reduce the surface load of the electric heating element, and thus increase the service life of the electric heating element to a certain extent.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0034] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A furnace bottom structure, characterized in that ,include: One or more refractory layers (1); A plurality of support frames (2) fixed to the uppermost layer of one or more refractory layers (1); An electric heating element (7) is provided on the upper surface of the refractory layer (1) excluding the support frame (2), and A plurality of furnace bottom cover plates (6) are fixed on a support frame (2), and the furnace bottom cover plates (6) and the side surfaces of adjacent support frames (2) and the upper surface of an electric heating element (7) enclose a heat dissipation cavity (5); the furnace bottom cover plates (6) include transverse cover plates (61) and vertical cover plates (62) alternately mounted on the support frame (2), and both sides of the transverse cover plates (61) are formed with folded edges (610), and a heat dissipation cavity (5) is formed between the side edges of any adjacent transverse cover plates (61) and the vertical cover plates (62) and above the surface of the vertical cover plates (62). A heat conduction cavity is provided, wherein the heat conduction cavity connects the heat dissipation cavity (5) with the space inside the furnace; the heat conduction cavity includes a heat conduction gap (4) and a heat transfer port (8); the heat conduction gap (4) is surrounded by the outer side surface of the vertical cover plate (62), the outer side surface of the horizontal cover plate (61), and the folded edge (610) of the horizontal cover plate (61); the heat transfer port (8) is located above the vertical cover plate (62); and the heat energy generated by the electric heating element (7) is sequentially transferred to the space inside the furnace through the heat dissipation cavity (5), the heat conduction gap (4), and the heat transfer port (8).

2. A furnace bottom structure according to claim 1, characterized in that: The upper surfaces of the plurality of support frames (2) are fixedly connected with pads (3) for auxiliary support, the upper surfaces of the plurality of pads (3) are flush with each other, and the contact surface between the pads (3) and the support frame (2) is smaller than the upper surface of the support frame (2).

3. A furnace bottom structure according to claim 1, characterized in that: The thickness of the furnace bottom cover plate (6) is set to 3-5 mm.

4. A furnace bottom structure according to claim 1, characterized in that: The transverse cover plate (61) and the vertical cover plate (62) are both U-shaped.

5. A furnace body, characterized in that: The furnace bottom structure comprises the furnace bottom structure described in any one of claims 1 to 4.

6. The furnace body according to claim 5, characterized in that: The furnace body is an electric furnace.

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