Radiant panel which is not easily deformed

Abstract

The utility model discloses a kind of radiation plates not easy to deform, including shell, with the heating plate of the shell connection and the heating pipe of the heating plate on installation, the surface of the heating plate has radiation coating, the heating plate is movably connected together with the shell, the heating plate is at least along length direction free expansion and contraction.The heating plate of the utility model is movably connected with shell, heating plate can produce normal free expansion, ensure the safety distance between board, heating plate inside will not produce stress, will not produce heating plate warping deformation gap or fastening connection place failure due to stress to damage heating plate.

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 non-deformable radiant plate includes a shell, a heating plate connected to the shell, and a heating tube mounted on the heating plate. The surface of the heating plate has a radiant coating. The heating plate is movably connected to the shell and the heating plate can freely extend and retract at least along its length.

[0005] The radiant plate that is not easily deformed according to this utility model also has the following auxiliary technical features:

[0006] Furthermore, the heating plate is movably connected to the heating tube.

[0007] Furthermore, the heating plate is connected to the housing via a sliding groove structure, and the heating plate can freely extend and retract along the sliding groove structure.

[0008] Further, the heating plate has a groove formed therein, and the heating tube is inserted into the groove.

[0009] 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.

[0010] Further, the housing has grooves formed on both sides, and the heating plate has retaining edges formed on both sides, which engage with the grooves.

[0011] Further, the minimum movable gap formed between the heating plate and the shell is set as D, then D≥L×a×T, where L is the length or width of the heating plate, a is the linear expansion coefficient of the heating plate, and T is the temperature change value of the heating plate.

[0012] Further, one end of the heating tube is connected to the housing by a fastener, and the other end of the heating tube is a free end.

[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 the prior art, the non-deformable radiant plate provided by this utility model has the following advantages: the heating plate of this utility model is movably connected to the shell, the heating plate can freely expand and contract, ensuring a safe distance between the plates, no stress is generated inside the heating plate, and there will be no warping or deformation of the heating plate to create gaps or failure of the fastening connection due to stress, thus damaging 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 after the cover plate has been 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 another embodiment of the present invention.

[0021] Figure 6 for Figure 5 Top view.

[0022] Figure 7 This is a physical image of the present invention. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 4 , Figure 7 As shown, this utility model provides a non-deformable radiant plate, comprising a housing 1, a heating plate 2 connected to the housing 1, and a heating tube 3 mounted on the heating plate 2. The surface of the heating plate 2 has a radiant coating, and the heating plate 2 is movably connected to the housing 1. The heating plate 2 can freely extend and retract at least along its length. The radiant coating in this utility model is an infrared thermal radiation coating, capable of generating infrared radiation from the high temperature of the heating tube 3 through the heating plate 2. This radiant plate is mainly used in vacuum drying equipment. Such drying equipment is primarily used in the drying process of transformer manufacturing, where infrared radiation is used to heat the inner cavity of the drying equipment, resulting in better heating effects.

[0025] 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.

[0026] To address the aforementioned problems, this invention features a flexible connection between the heating plate 2 and the housing 1, rather than a rigid one. This allows the heating plate 2 to freely expand and contract relative to the housing 1 without deformation, thus resolving the issues present in current technology. Furthermore, this invention uses an independent heating element as the heat source, ensuring the heating wire is safely isolated from the outside of the heating plate without contact. The overall mechanical strength is sufficient, preventing warping or deformation under heat and eliminating the risk of electrical leakage. Figure 7 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.

[0027] See Figures 1 to 4In the above embodiments of this utility model, the heating plate 2 and the heating tube 3 are movably connected together. In this embodiment, the movable connection refers to a flexible connection between the heating plate 2 and the heating tube 3, meaning they can be displaced relative to each other. The connection between the heating tube 3 and one end of the heating plate 2 ensures single-sided limiting while allowing free sliding at the other end. The heating plate 2 can thermally expand normally, ensuring a safe distance between the plates. No stress is generated inside the heating plate 2, preventing warping or deformation that could create gaps, or failure at the fastening joint due to stress, thus preventing damage to the heating plate.

[0028] See Figures 1 to 4 In the above embodiments of this utility model, the heating plate 2 and the housing 1 are further connected by a sliding groove structure, and the heating plate 2 can freely expand and contract along the sliding groove structure. In this utility model, the heating plate 2 and the housing 1 are connected by a sliding groove structure. When the heating plate 2 expands and contracts due to heat, it can expand and contract along the sliding groove, which serves as a deformation space for the heating plate 2, preventing warping and deformation. This solves the deformation problem caused by rigid connections in the prior art.

[0029] See Figures 1 to 4 In the above embodiment of this utility model, the heating plate 2 is further provided with a groove 21 formed thereon, and the heating tube 3 is inserted into the groove 21. The cross-section of the groove 21 in this utility model is the same as the cross-section 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 a circular structure with an opening on its side. This structure allows the groove 21 to have a pre-tightening force, ensuring that when the heating tube 3 is inserted into the groove 21, the groove 21 can clamp the heating tube 3 tightly, preventing it from easily detaching from the groove 21. However, when the heating plate 2 expands and contracts due to heat, the groove 21 and the heating tube 3 slide relative to each other, providing deformation space for the heating plate 2.

[0030] In this invention, the heating plate 2 is flexibly connected to both the housing 1 and the heating tube 3. This connection method provides deformation space for the heating plate 2, meaning the heating plate 2 has a deformation allowance. The flexible connection refers to a sliding groove connection structure, a snap-fit ​​structure, etc., which has a certain amount of flexibility. The rigid connection refers to bolt, rivet, adhesive, etc., which provides a strong connection but lacks flexibility.

[0031] See Figures 1 to 4In the above embodiment of this utility model, the heating plate 2 is further comprising: bent wing plates 22 formed on both sides; grooves 23 formed on the wing plates 22; and flanges 11 formed on both sides of the housing 1, the flanges 11 being engaged in the grooves 23. This utility model employs a connection structure of flanges 11 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.

[0032] See Figures 1 to 4 In the above embodiments of this utility model, the minimum movable gap formed between the heating plate 2 and the housing 1 is further defined as D, where D ≥ L × a × T, and L is the length or width of the heating plate 2, a is the linear expansion coefficient of the heating plate 2, and T is the temperature change value of the heating plate 2. In this embodiment, the heating plate 2 is made of aluminum alloy, and the linear expansion coefficient of the heating plate 2 is 24 × 10⁻⁶. -6 The heating plate 2 has a length of 1000mm and a width of 140mm. The operating temperature is 300℃, and the ambient temperature is 25℃. Therefore, the movable clearance D of the heating plate 2 in the length direction is ≥1000×0.000024×275, i.e., D≥6.6mm. The movable clearance D of the heating plate 2 in the width direction is ≥140×0.000024×275, i.e., D≥0.924mm. In this embodiment, when the heating plate 2 is operating normally, the maximum deformation length in the length direction is 6.6mm, and the maximum deformation in the width direction is 0.924mm. The movable clearance between the heating plate 2 and the housing 1 needs to be greater than 6.6mm in the length direction and greater than 0.924mm in the width direction. The above formula can more accurately determine the setting of the movable clearance.

[0033] See Figures 1 to 4 In the above embodiments of this utility model, one end of the heating tube 3 is connected to the housing 1 via a fastener 31, and the other end of the heating tube 3 forms a free end. In this embodiment, one end of the heating tube 3 is connected to the housing 1 via a fastener 31, 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.

[0034] See Figures 1 to 4In 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.

[0035] See Figures 1 to 4 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.

[0036] See Figure 5 and Figure 6 In 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.

[0037] In another embodiment of this utility model, grooves are formed on both sides of the housing 1, and retaining edges are formed on both sides of the heating plate 2, the retaining edges engaging with the grooves. In this embodiment, grooves are formed in the housing 1, and retaining edges are formed on the heating plate 2, the retaining edges engaging with the grooves. That is, the forming positions of the grooves and the retaining edges are interchanged. Other structures are the same as in the above embodiment.

[0038] 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 radiant plate that is not easily deformed, comprising a shell, a heating plate connected to the shell, and a heating tube mounted on the heating plate, characterized in that: The surface of the heating plate has a radiation coating, the heating plate is movably connected to the housing, and the heating plate can freely extend and retract at least along its length.

2. The radiant plate that is not easily deformed as described in claim 1, characterized in that: The heating plate is movably connected to the heating tube.

3. A radiating plate that is not easily deformed as described in claim 1, characterized in that: The heating plate is connected to the housing via a sliding groove structure, and the heating plate can freely extend and retract along the sliding groove structure.

4. A radiating plate that is not easily deformed as described in claim 1, characterized in that: The heating plate has a groove formed therein, and the heating tube is inserted into the groove.

5. A radiating plate that is not easily deformed 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.

6. A radiating plate that is not easily deformed as described in claim 1, characterized in that: The housing has sliding grooves on both sides, and the heating plate has retaining edges on both sides, which engage with the sliding grooves.

7. A radiating plate that is not easily deformed as described in claim 1, characterized in that: Let D be the minimum movable gap formed between the heating plate and the shell. Then D ≥ L × a × T, where L is the length or width of the heating plate, a is the linear expansion coefficient of the heating plate, and T is the temperature change value of the heating plate.

8. A radiating plate that is not easily deformed as described in claim 1, characterized in that: One end of the heating tube is connected to the housing by a fastener, and the other end of the heating tube is a free end.

9. A radiating plate that is not easily deformed 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 non-deformable radiating plate as described in claim 1, characterized in that: Multiple radiating plates are assembled together to form a large-width radiating unit.

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