A safe and reliable drying radiant panel

Abstract

The utility model discloses a safe and reliable drying radiant panel, including casing, with the heating plate of casing is connected and installs heating component on heating plate, the surface of heating plate has radiation coating, heating component is independent heating pipe, the back of heating plate is provided with fixed recess, heating pipe inserts recess, at least part heating plate is free expansion relative to heating pipe. The utility model uses independent heating pipe as heat source, and electric heating wire and heating plate outside safe isolation no contact, and the overall mechanical strength is enough, and the warping deformation will not be generated under the heating, and the product will not go out the risk of electric leakage.

Description

Technical Field

[0001] This utility model relates to a heating component for use in drying equipment, and more particularly to a heating component for use in drying equipment for drying transformer cores. Background Technology

[0002] In the prior art, such as Chinese Patent No. CN201310624796.3, published on July 23, 2014, a unidirectional infrared radiation plate is disclosed, which has three functional layers: a heat insulation layer, a heat-generating insulation layer, and a metal heat-conducting radiation layer. It is composed of layers of materials with different functions. Its first layer is the heat insulation layer, its second layer is the heat-generating insulation layer, and its third layer is the metal heat-conducting radiation layer. The heat insulation layer is composed of silicate or silicon oxide ceramic material, formed as a fiber layer and a porous layer, or a mixture of porous and fiber layers. The heat-generating insulation layer is composed of silicate or silicon oxide ceramic material; one side of this layer is a rough surface, and the other side is engraved with uniformly distributed grooves. Heating wires are embedded in these grooves, or conductive silicon carbide is sintered in the grooves. The metal heat-conducting radiation layer is made of a heat-conducting metal material, with an oxide layer formed on its surface. One side is combined with the heat-generating insulation layer, and the other side is coated with an infrared radiation material. In the above solution, the multiple heating layers are rigidly connected, and the heating plate operates at a very high temperature. Temperature differences exist between the heating layers, resulting in varying degrees of thermal expansion. The rigid connection forcibly restricts the free expansion of the heating plate, causing bending and deformation of the metal heating plate. This creates gaps between the heating layers. These gaps lead to poor contact between the temperature probe and the heating plate, resulting in a lower detected temperature. This misleads the temperature control module, causing the heating plate temperature to be higher than expected, affecting the safety of the dried product. The insulation between the heating wires relies entirely on the insulating material. Gaps allow insulating material powder to settle, causing the heating wires to warp. This insulation failure can easily lead to short circuits, generating large currents and significant heat. This can cause the insulating material to overheat and fail. If the heat source is energized, it will directly connect to the outer casing, resulting in an externally electrified heating plate, posing a serious safety hazard. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a safe, reliable radiant plate with a heating plate that is not easily deformed.

[0004] According to the present invention, a safe and reliable drying radiation plate includes a shell, a heating plate connected to the shell, and a heating component mounted on the heating plate. The surface of the heating plate has a radiation coating, the heating component is an independent heating tube, a fixing groove is provided on the back side of the heating plate, the heating tube is inserted into the groove, and at least part of the heating plate can freely extend and retract relative to the heating tube.

[0005] The safe and reliable drying radiation plate provided by this utility model also has the following auxiliary technical features:

[0006] Further, one end of the heating tube is connected to a connecting piece, which is connected to the housing by a fastener, and the other end of the heating tube extends out of the groove to form a free end.

[0007] Further, the frictional force between the heating tube and the groove is F, the gravity generated by the weight of the heating plate is G, and the deformation force generated by the heating plate during thermal expansion and contraction is N. Then a×G≤F≤b×N, where a is a constant with a value range of a=3-10; b is a constant with a value range of b=0.1-0.3.

[0008] The heating element further includes a metal outer tube, a heating wire installed in the outer tube, and an insulating material, with an insulating magnetic head provided at the end of the outer tube.

[0009] It further includes a lead post, which is fitted with a shrink-fit insulating sleeve.

[0010] The housing further includes an outer shell and an inner shell, with an insulation space formed between the outer shell and the inner shell, and the insulation space is filled with an insulation layer.

[0011] Further, a heat storage tank is formed between the inner shell and the heating plate.

[0012] Further, the heating plate has bent wing plates formed on both sides, and the wing plates have grooves formed on them. The housing has flanges formed on both sides, and the flanges are engaged in the grooves.

[0013] Further, the heating plate is a long strip-shaped flat plate structure, and multiple heating tubes are installed on the back side of the heating plate; or the cross-section of the heating plate is arc-shaped or polygonal, and a single heating tube is installed on the back side of the heating plate.

[0014] Furthermore, multiple radiating plates are assembled together to form a large-width radiating unit.

[0015] Compared with existing technologies, the safe and reliable radiant drying plate provided by this utility model has the following advantages: First, this utility model uses an independent heating tube as the heat source, and the heating wire is safely isolated from the outside of the heating plate without contact. The overall mechanical strength is sufficient, and it will not warp or deform when heated, ensuring that the product has no risk of leakage. Second, the heating plate and heating tube of this utility model are flexibly connected, allowing the heating plate to extend and retract freely, ensuring a safe distance between the plates. No stress is generated inside the heating plate, preventing warping or deformation that could create gaps, or failure at the fastening joints due to stress, thus avoiding damage to the heating plate. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention.

[0017] Figure 2 This is a top view of the present invention.

[0018] Figure 3 This is a top view of the present invention with the cover plate removed.

[0019] Figure 4 This is a front view of the heating plate in this utility model.

[0020] Figure 5 This is a front view of the inner shell in this utility model.

[0021] Figure 6 This is a front view of the outer shell of this utility model.

[0022] Figure 7 This is a front view of the heating tube in this utility model.

[0023] Figure 8 This is a front view of another embodiment of the present invention.

[0024] Figure 9 for Figure 8 Top view.

[0025] Figure 10 This is a physical image of the present invention.

[0026] Figure 11 This is a physical diagram of the end of this utility model. Detailed Implementation

[0027] To clearly illustrate the solutions in this utility model, preferred embodiments are given below in conjunction with the accompanying drawings for detailed description. The following description is merely exemplary and not intended to limit the application or use of this disclosure. It should be understood that throughout the drawings, corresponding reference numerals denote the same or corresponding parts and features.

[0028] like Figures 1 to 7 , Figure 10 and Figure 11As shown, this utility model provides a safe and reliable drying radiation plate, including a housing 1, a heating plate 2 connected to the housing 1, and a heating component mounted on the heating plate 2. The surface of the heating plate 2 has a radiation coating, and the heating component is an independent heating tube 3. A fixing groove 21 is provided on the back side of the heating plate 2, and the heating tube 3 is inserted into the groove 21. At least a portion of the heating plate 2 can freely extend and retract relative to the heating tube 3. The radiation coating in this utility model is an infrared thermal radiation coating, which can generate infrared radiation from the high temperature of the heating tube 3 through the heating plate 2. The radiation plate in this utility model is mainly used in vacuum drying equipment. This type of drying equipment is mainly used in the drying process of transformer manufacturing. Using infrared radiation to heat the inner cavity of the drying equipment results in better heating effect. Figure 10 This is a physical image of the utility model; the right side is the front, and the left side is the back. The front view on the right shows a black radiation coating on the surface.

[0029] Existing heating plates mainly employ a large-panel structure with multiple layers, where the heating wire is directly embedded within the layers. However, the following problems have been observed during use: 1) The heating wire is exposed without insulation, and the use of mica paper and magnesium oxide powder for post-insulation is unreliable; 2) Temperature probes are screwed between the plates to measure temperature, which is unreliable, prone to providing erroneous data, and interferes with temperature control; 3) Excessive heating power and surface temperature on a single plate lead to overheating, making the temperature control module overly dependent on temperature limits. Probe failure can cause the heating plate to overheat and burn the dried product; 4) Using conventional insulation cotton as the insulation layer allows powder from the insulation to enter the product and vacuum pump piping during the vacuum process, negatively impacting product and equipment safety; 5) The heating plate's rated voltage is 100V, requiring an external transformer, which is inconvenient. The aforementioned problems are mainly caused by the following reasons: The multi-layer heating plates are fixed by bolts with a rigid connection. The heating plates operate at very high temperatures, and there is a temperature difference between the three heating plates, resulting in different degrees of thermal expansion. The rigid connection forcibly restricts the free expansion of the heating plates, causing them to bend and deform. This creates gaps between the plates, leading to two problems: 1. The temperature probe is fixed here with a threaded connection. Gaps in these gaps cause poor contact between the probe and the heating plate, resulting in a lower detected temperature. This misleads the temperature control module, causing the heating plate temperature to be higher than expected, affecting the safety of the dried product. 2. The insulation between the heating wires relies entirely on magnesium oxide powder. Gaps cause the magnesium oxide powder to settle, and the nickel-chromium alloy flat wires warp. This leads to insulation failure between the nickel-chromium alloy flat wires, easily causing a short circuit and generating a large current and a large amount of heat. This can easily cause the mica paper to overheat and fail. If the heat source is energized, it will directly connect to the outer casing, resulting in the heating plate becoming externally electrified, posing a serious safety hazard.

[0030] To address the aforementioned problems, this invention uses an independent heating element as the heat source. The heating wire is safely isolated from the heating plate without contact, ensuring sufficient overall mechanical strength and preventing warping or deformation under heat, thus eliminating the risk of electrical leakage. The heating plate 2 and the heating element 3 are movably connected, employing a flexible connection rather than a rigid one. During thermal expansion and contraction, the heating plate 2 can freely expand and contract relative to the heating element 3 without deformation. This solves the problems existing in current technologies.

[0031] In this invention, the cross-section of the groove 21 is the same as that of the heating tube 3, allowing the heating tube 3 to fit tightly against the groove 21, facilitating the transfer of heat from the heating tube 3 to the heating plate 2. In this embodiment, the heating tube 3 is a circular tube structure, and the groove 21 is also circular with an opening on its side. This structure provides a pre-tightening force to the groove 21, ensuring that when the heating tube 3 is inserted into it, the groove 21 clamps the heating tube 3 tightly, preventing it from easily detaching. However, during thermal expansion and contraction of the heating plate 2, the groove 21 and the heating tube 3 slide relative to each other, providing deformation space for the heating plate 2.

[0032] See Figures 1 to 7 , Figure 11 In the above embodiment of this utility model, it is further included that one end of the heating tube 3 is connected to a connecting piece 31, the connecting piece 31 is connected to the housing 1 by a fastener 32, and the other end of the heating tube 3 extends out of the groove 21 to form a free end. In this embodiment, one end of the heating tube 3 is connected to the housing 1 by the fastener 32, thereby limiting the position of the heating tube 3. This utility model connects the housing 1, the heating plate 2, and the heating tube 3 together, and each of the three has a deformation allowance. In this utility model, the heating plate 2 can be fixedly connected to the heating tube 2 or the housing 1 at one end, and the rest is not rigidly connected, so that the heating plate 2 can freely extend and retract to the other end. Of course, it can also be fixedly connected in the middle, and the heating plate 2 can freely extend and retract in both directions. Figure 11 This is a physical image of the rear end of this utility model. As can be seen from the physical image, the heating tube 3 is slidably connected to the heating plate 2, and the connecting piece 31 is connected to the housing 1 by bolts.

[0033] See Figures 1 to 7In the above embodiments of this utility model, the frictional force between the heating tube 3 and the groove 21 is F, the gravity generated by the self-weight of the heating plate 2 is G, and the deformation force generated by the heating plate 2 during thermal expansion and contraction is N. Therefore, a×G≤F≤b×N, where a is a constant with a value range of a=3-10; b is a constant with a value range of b=0.1-0.3. In this embodiment, a is 5 and b is 0.2. That is, 5G≤F≤0.2N. The groove 21 in this utility model has a pre-tightening force, which can clamp the heating tube 3. Under normal conditions, the positions of the heating plate 2 and the heating tube 3 are relatively fixed and will not easily shift, i.e., they are connected together. When the heating plate 2 undergoes thermal expansion and contraction, the deformation force of the heating plate 2 is greater than the frictional force between the heating tube 3 and the groove 21, and the heating plate 2 slides relative to the heating tube 3, i.e., the heating plate 2 can freely expand and contract without easily deforming.

[0034] See Figures 1 to 7 In the above embodiments provided by this utility model, the heating tube 3 further includes a metal outer tube 33, a heating wire installed in the outer tube 33, and an insulating material. An insulating magnetic head 34 is provided at the end of the outer tube 33. The insulating magnetic head 34 serves to limit and fix the outer tube 33, and also serves to insulate it. The insulating magnetic head 34 is tightened by a fixing nut.

[0035] See Figures 1 to 7 In the above embodiments of this utility model, the invention further includes a lead-out post 35, on the outside of which a shrink-fit insulating sleeve 36 is fitted. The lead-out post 35 has threads formed on it, and the nut is mounted on the lead-out post 35. The shrink-fit insulating sleeve 36 provides protection and improves safety.

[0036] See Figures 1 to 7 In the above embodiments of this utility model, the housing 1 further includes an outer shell 12 and an inner shell 13, with an insulation space formed between the outer shell 12 and the inner shell 13, and an insulation layer 14 filled in the insulation space. This utility model adopts a double-layer housing structure, forming an insulation space between the outer shell 12 and the inner shell 13, and placing the insulation layer 14 within this insulation space. The insulation layer 14 is made of insulation material and, when placed within the insulation space, better protects the insulation material and prevents it from splashing. Under the action of vacuum suction, no powder will be generated that could affect the product or vacuum system piping. The insulation layer 14 is integrally molded from insulation material. This utility model, by making the insulation material into an integral structure, can reduce powder generation and will not affect the product or vacuum system piping.

[0037] See Figures 1 to 7In the above embodiments of this utility model, a heat storage tank 11 is further formed between the inner shell 13 and the heating plate 2. In this utility model, the heat storage tank 11 and the insulation layer 14 are separately arranged, preventing the insulation material in the insulation layer 14 from splashing into the heat storage tank 14 and thus making it less likely to be sucked away by the vacuum system. Furthermore, this separate arrangement results in better heat storage performance.

[0038] See Figures 1 to 7 In the above embodiment of this utility model, the heating plate 2 is further comprising bent wing plates 22 formed on both sides, the wing plates 22 having grooves 23 formed thereon, and the housing 1 having flanges 15 formed on both sides, the flanges 15 being engaged in the grooves 23. This utility model employs a connection structure of flanges 15 and grooves 23, which provides deformation allowance not only in the length direction but also in the width direction, thereby ensuring the flatness of the heating plate 2 and preventing warping or deformation. The heating plate 2 and the housing 1 are movably connected, i.e., a flexible connection is used instead of a rigid connection. The heating plate 2 can freely expand and contract relative to the housing 1 during thermal expansion and contraction, and is less prone to deformation.

[0039] See Figures 1 to 7 In the above embodiments of this utility model, the heating plate 2 is a long, flat plate structure, and multiple heating tubes 3 are mounted on the back side of the heating plate 2. In this embodiment, the heating plate 2 is a rectangular flat plate structure with a length of 1000mm, a width of 145mm, and a thickness of 3mm. A boss is integrally formed on the back side, and a groove 21 is formed on the boss. The heating tubes 3 are inserted into the grooves 21. In this embodiment, there are two heating tubes 3 and two grooves 21.

[0040] See Figures 1 to 7 In the above embodiments of this utility model, it is further included that multiple radiating plates are assembled together to form a large-width radiating unit. To expand the radiating area, this utility model can use multiple radiating plates to form a radiating unit. In this splicing structure, there are gaps between the radiating plates, satisfying the requirements for thermal deformation of each radiating plate, thus preventing deformation of the large-width radiating unit. In this embodiment, the radiating unit includes a top slot plate and a bottom slot plate. Multiple radiating plates are arranged side-by-side, with the top slot plate engaging the top of the multiple radiating plates and the bottom slot plate engaging the bottom of the multiple radiating plates, thereby forming a single integral structure. The wiring of each heating tube 3 is summarized and led out to the outside via a single bus for convenient wiring.

[0041] See Figure 8 and Figure 9In another embodiment of this utility model, the heating plate 2 has an arc-shaped or polygonal cross-section, and a single heating tube 3 is installed on the back side of the heating plate 2. In this embodiment, the heating plate 2 has an arc-shaped structure, which can expand the radiation angle and increase the radiation area. In this embodiment, the heating plate 2 is relatively narrow, close to the size of a single tube in a conventional hot oil heating heat dissipation pipe, which is beneficial for modifying existing drying equipment. Other structures in this embodiment are the same as those in the above embodiment.

[0042] In summary, the above description is merely an embodiment of this utility model and is only used to illustrate the principle of this utility model, not to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A safe and reliable drying radiant panel, comprising a housing, a heating plate connected to the housing, and a heating element mounted on the heating plate, characterized in that: The surface of the heating plate has a radiation coating, the heating component is an independent heating tube, the back side of the heating plate is provided with a fixing groove, the heating tube is inserted into the groove, and at least part of the heating plate can freely extend and retract relative to the heating tube.

2. The safe and reliable drying radiation plate as described in claim 1, characterized in that: One end of the heating tube is connected to a connecting piece, which is connected to the housing by fasteners. The other end of the heating tube extends out of the groove to form a free end.

3. The safe and reliable drying radiation plate as described in claim 1, characterized in that: The frictional force between the heating tube and the groove is F, the gravity generated by the weight of the heating plate is G, and the deformation force generated by the heating plate during thermal expansion and contraction is N. Then a×G≤F≤b×N, where a is a constant with a value range of a=3-10; b is a constant with a value range of b=0.1-0.

3.

4. A safe and reliable drying radiation plate as described in claim 1, characterized in that: The heating tube includes a metal outer tube, a heating wire installed in the outer tube, and an insulating material. An insulating magnetic head is provided at the end of the outer tube.

5. A safe and reliable drying radiation plate as described in claim 4, characterized in that: It also includes lead-out posts, which are fitted with a shrink-insulating sleeve.

6. A safe and reliable drying radiation plate as described in claim 1, characterized in that: The housing includes an outer shell and an inner shell, with an insulation space formed between the outer shell and the inner shell, and the insulation space is filled with an insulation layer.

7. A safe and reliable drying radiation plate as described in claim 6, characterized in that: A heat storage tank is formed between the inner shell and the heating plate.

8. A safe and reliable drying radiation plate as described in claim 1, characterized in that: The heating plate has bent wing plates on both sides, and the wing plates have grooves formed on them. The shell has flanges on both sides, and the flanges are inserted into the grooves.

9. A safe and reliable drying radiation plate as described in claim 1, characterized in that: The heating plate is a long strip-shaped flat plate structure, and multiple heating tubes are installed on the back side of the heating plate; or the cross-section of the heating plate is arc-shaped or polygonal, and a single heating tube is installed on the back side of the heating plate.

10. A safe and reliable drying radiation plate as described in claim 1, characterized in that: Multiple radiating plates are assembled together to form a large-width radiating unit.

Images