Railway turnout ice and snow melting heating device

Abstract

The utility model relates to railway safety protection technical field, concretely relates to a railway turnout ice and snow melting heating device, including metal shell and the combination wire core of setting in metal shell, the combination wire core includes at least one layer heating band, the upper end surface of heating band and the inside top end surface of metal shell between the superposition has a plurality of first mica piece layer, the lower end surface of heating band and the inside bottom end surface of metal shell between the superposition has a plurality of second mica piece layer, the superposition has a plurality of third mica piece layer between two adjacent heating bands, one end of heating band is connected and leads out the wire. The utility model discloses heating device through the combination wire core of being composed of heating band and mica piece layer sets in the wire core containing cavity of metal shell, and utilizes the abutment boss and press tightly the combination wire core close to one side of plane, effectively promoted the heat transfer efficiency of heating device, simplified the structure of heating device, further reduced the production cost.

Description

Technical Field

[0001] This utility model relates to the field of track safety protection technology, specifically to a heating device for melting ice and snow on railway turnouts. Background Technology

[0002] Switches are an essential component of railway tracks, indispensable for switching trains from one track to another, and play a vital role in railway transportation. In winter, railway switches are prone to icing, especially the switch rails and the junction between the switch rail and the stock rail. Icing can cause excessive gaps at the junction, potentially leading to train derailments and posing a significant risk.

[0003] In existing technologies, there are two common methods for dealing with icing on railway turnouts: 1. Employees inspect the turnouts along the line for ice and snow, and when ice and snow are detected, they manually sweep it away; 2. Using a blowtorch, with a small gas canister attached, to burn away the ice and evaporate the water. However, these two methods have the following problems and disadvantages: 1. Employee inspection and snow sweeping along the line is a relatively traditional method, but it requires a large number of personnel, has low work efficiency, and is not suitable for situations where snow melts and then re-ices; 2. Using a blowtorch, with a small gas canister attached, to burn away the ice and evaporate the water, is also relatively inefficient, requires a large number of personnel, and is physically demanding. In recent years, people have begun to install electric heating anti-freezing devices on the turnout rails to effectively ensure the safe operation of the tracks. These heating devices mainly rely on imported electric heating bars, which use a heating wire and magnesium oxide structure, resulting in low thermal efficiency, uneven heating, and poor temperature control sensitivity. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a heating device for melting ice and snow on railway turnouts. This heating device effectively improves the heat transfer efficiency of the heating device, simplifies the structure of the heating device, and further reduces the production cost by fitting a combined wire core composed of a heating element and a mica sheet layer into the wire core receiving cavity of the metal shell and pressing the combined wire core tightly against the side close to the plane using an abutment boss.

[0005] The purpose of this utility model is achieved through the following technical solution: a heating device for melting ice and snow on railway turnouts, comprising a metal shell and a combined core sleeved inside the metal shell; the combined core includes at least one heating layer, with a plurality of first mica sheet layers stacked between the upper end face of the heating layer and the inner top face of the metal shell, a plurality of second mica sheet layers stacked between the lower end face of the heating layer and the inner bottom face of the metal shell, and a plurality of third mica sheet layers stacked between adjacent heating layers, and one end of the heating layer is connected to a lead wire.

[0006] Preferably, the metal shell has a hollow structure, the hollow cavity of the metal shell is a core receiving cavity, and the combined core is sleeved in the core receiving cavity.

[0007] Preferably, one side of the metal casing is set as a plane.

[0008] Preferably, one side of the metal casing is recessed inward with a groove.

[0009] Preferably, the inner wall of the core receiving cavity extends toward the plane of the metal shell with an abutting boss, which can press the combined core sleeved in the core receiving cavity tightly against the side close to the plane.

[0010] Preferably, a heat-insulating cavity is provided between the abutting boss and the combined wire core, and the heat-insulating cavity is located on both sides of the abutting boss.

[0011] Preferably, one or both ends of the composite wire core extend out of the end of the metal shell, and the end of the composite wire core extending out of the metal shell is provided with a welding pad, and the lead wire is connected at the welding pad.

[0012] Preferably, the heating device further includes a metal handle disposed at the end of the metal casing, wherein the ends of the metal casing and the combined wire core extend into the metal handle, and the metal handle is filled with a temperature-resistant sealing resin for sealing the metal handle, the metal casing, and the combined wire core; the temperature-resistant sealing resin is preferably polyurethane resin or epoxy resin.

[0013] Preferably, the metal handle includes a first threaded portion, a second threaded portion, and a third threaded portion that are screwed together in sequence, and a wire harness sleeve sleeved at the end of the first threaded portion, wherein a threaded connector is sleeved on the outer surface of the wire harness sleeve.

[0014] Preferably, the material of the heating element is an iron-chromium alloy or a nickel-chromium alloy; the metal outer shell is made of 304 stainless steel; and the surface of the metal outer shell is provided with a nickel oxide layer.

[0015] This utility model also provides an application of a heating device for melting ice and snow on railway turnouts, which is used for ice and snow prevention and melting in railways, bridges, and buildings.

[0016] The beneficial effects of this utility model are as follows: The heating device of this utility model, by fitting a combined wire core composed of a heating element and a mica sheet layer into the wire core receiving cavity of the metal shell, and using an abutting boss to press the combined wire core tightly against the side close to the plane, effectively improves the heat transfer efficiency of the heating device, simplifies the structure of the heating device, and further reduces the production cost. Attached Figure Description

[0017] Figure 1This is a perspective view of the present invention;

[0018] Figure 2 This is a three-dimensional schematic diagram of the present invention from another perspective;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 This is another exploded view of the present invention;

[0021] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 This is a schematic diagram of the structure of the metal casing of this utility model;

[0023] Figure 7 This is a schematic diagram of the combined wire core of this utility model;

[0024] Figure 8 This is another exploded view of the present invention.

[0025] The attached figures are labeled as follows: 1-metal casing, 11-core housing cavity, 12-plane, 13-groove, 14-abutting boss, 15-insulating cavity, 2-combined core, 21-heating tube, 22-first mica layer, 23-second mica layer, 24-third mica layer, 25-welding disc, 3-metal handle, 31-first screw connection, 32-second screw connection, 33-third screw connection, 34-wire harness sleeve, 35-screw connector. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figures 1-8 This invention provides a further description of the present invention, clearly and completely illustrating the technical solutions in its embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present invention. The connection relationships shown in the drawings are merely for clarity of description and do not limit the connection methods.

[0027] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0028] It should also be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Example 1

[0030] See Figures 1-8 A heating device for melting ice and snow on railway turnouts includes a metal shell 1 and a combined wire core 2 fitted inside the metal shell 1. The combined wire core 2 includes multiple layers of heating tape 21. Several first mica sheet layers 22 are stacked between the upper end face of the heating tape 21 and the inner top face of the metal shell 1. Several second mica sheet layers 23 are stacked between the lower end face of the heating tape 21 and the inner bottom face of the metal shell 1. Several third mica sheet layers 24 are stacked between adjacent heating tapes 21. One end of the heating tape 21 is connected to a lead wire. The mica sheet layers and the sheet heating tape 21 are integrally sintered to increase the insulation performance of the metal shell 1 and the combined wire core 2. The combined wire core 2 with the above structure has sensitive temperature control. The metal shell 1 has a hollow structure. The hollow cavity of the metal shell 1 is a wire core receiving cavity 11. The combined wire core 2 is fitted inside the wire core receiving cavity 11.

[0031] In this embodiment, the heating device effectively improves the heat transfer efficiency, simplifies the structure of the heating device, and further reduces the production cost by fitting the combined wire core 2, which consists of a heating element 21 and a mica sheet layer, into the wire core receiving cavity 11 of the metal shell 1, and using the abutment boss 14 to press the combined wire core 2 tightly against the side close to the plane 12.

[0032] In this embodiment, one side of the metal shell 1 is set as a plane 12 (i.e., a heating plane). The design of the heating plane can effectively increase the contact area with the track surface and improve the heating efficiency of the track or heated object. The other side of the metal shell 1 is recessed with a groove 13. The first mica sheet layer 22 is located on the side close to the groove 13, and the second mica sheet layer 23 is located on the side close to the plane 12. The thickness of the second mica sheet layer 23 is less than the thickness of the first mica sheet layer 22. The above design is beneficial to transfer the heat generated by the heating element 21 to the heating plane 12. The thicker first mica sheet layer 22 can effectively prevent heat from spreading outward and play a role in heat insulation. The above design further improves the utilization of the heating efficiency of the combined wire core 2. At the same time, the design of the groove 13 can also further improve the structural strength of the metal shell 1.

[0033] In this embodiment, the inner wall of the core receiving cavity 11 extends to the side of the plane 12 of the metal shell 1 with an abutment protrusion 14. The abutment protrusion 14 can press the combined core 2 sleeved in the core receiving cavity 11 tightly against the side close to the plane 12.

[0034] In this embodiment, when manufacturing the composite core 2, heating tapes 21 are first sintered on both sides of the third mica sheet layer 24. One end of the heating tape 21 is connected by riveting or welding, and the other end is connected to lead wires to form an electrical circuit. Then, several layers of first mica sheet layer 22 and second mica sheet layer 23 are sintered on the surface of the heating tape 21, and so on. Multiple layers of heating tape 21 can be set according to the required power, forming a multi-layer foldable design to obtain the required power. The composite core 2 is then installed in the metal shell 1. The abutment protrusion 14 on the inner side of the metal shell 1 presses the composite core 2 tightly against the side close to the plane 12, increasing the contact area between the composite core 2 and the heating plane 12. This allows the heat emitted by the composite core 2 to be well transferred to the heating plane 12 of the metal shell 1, and then the heat is transferred to the railway track or the object to be heated, achieving the purpose of melting ice and preventing freezing, so that the switch mechanical mechanism can operate smoothly.

[0035] In this embodiment, a heat insulation cavity 15 is provided between the abutting boss 14 and the combined wire core 2. The heat insulation cavity 15 is located on both sides of the abutting boss 14, which can effectively isolate the heat generated by the combined wire core 2 from spreading to the groove 13, thus preventing the problem of low thermal efficiency.

[0036] In this embodiment, one or both ends of the composite core 2 extend out of the end of the metal shell 1, and the end of the composite core 2 extending out of the metal shell 1 is provided with a welding plate 25, and the lead wire is connected at the welding plate 25.

[0037] In this embodiment, the heating device further includes a metal handle 3 disposed at one end of the metal casing 1. The ends of the metal casing 1 and the combined wire core 2 at the same end both extend into the metal handle 3. The metal handle 3 is filled with a heat-resistant sealing resin for sealing the metal handle 3, the end of the metal casing 1, and the combined wire core 2. The heat-resistant sealing resin is preferably polyurethane resin or epoxy resin. By filling with the heat-resistant sealing resin, the end of the combined wire core 2 can be effectively fixed to the metal handle 3, which facilitates connecting the lead wire of the combined wire core 2 to the power supply and completing the overall fabrication of the heating device.

[0038] In this embodiment, the metal handle 3 includes a first screwed part 31, a second screwed part 32, and a third screwed part 33 that are screwed together in sequence, and a wire harness sleeve 34 sleeved on the end of the first screwed part 31. The outer surface of the wire harness sleeve 34 is fitted with a screw connector 35. The metal handle 3 with the above structure is conducive to connecting the combined wire core 2 to the power supply. The design of the wire harness sleeve 34 can effectively separate the lead wires of different layers of heating tape 21 and connect them to the power supply, simplifying the structure of the device and making it more practical.

[0039] In this embodiment, the heating tape 21 is made of iron-chromium alloy or nickel-chromium alloy. The heating tape 21 made of the above materials has a high operating temperature, long service life, high mechanical strength, and high thermal efficiency. At the same time, it saves energy, is safe to use, and can be bent into various shapes. The metal shell 1 is made of 304 stainless steel. The surface of the metal shell 1 is provided with a nickel oxide layer. The nickel oxide layer can increase the corrosion resistance of the metal shell 1 and can act as a protective barrier to prevent corrosive media from directly contacting the base metal, thereby extending the service life of the stainless steel material.

[0040] In this embodiment, the heating device is used for snow and ice removal in railways, bridges, and buildings. By applying this heating device to snow and ice removal in railways, bridges, and buildings, the efficiency of snow and ice removal is improved, and the manpower consumption and potential risks are greatly reduced.

[0041] Example 2

[0042] The difference between this embodiment and Embodiment 1 is that the composite core 2 in this embodiment includes a heating element 21. A plurality of first mica sheet layers 22 are stacked between the upper end surface of the heating element 21 and the inner top surface of the metal casing 1, and a plurality of second mica sheet layers 23 are stacked between the lower end surface of the heating element 21 and the inner bottom surface of the metal casing 1. One end of the heating element 21 is connected to a lead wire. The rest of this embodiment is the same as in Embodiment 1 and will not be repeated here.

[0043] Example 3

[0044] The difference between this embodiment and Embodiment 1 is that the heating device in this embodiment further includes metal handles 3 disposed at both ends of the metal casing 1. The rest of this embodiment is the same as Embodiment 1 and will not be repeated here.

[0045] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A heating device for melting ice and snow on railway turnouts, characterized in that: The device includes a metal casing and a composite core housed within the metal casing. One side of the metal casing has an inwardly recessed groove. The composite core includes at least one heating element. Several first mica sheet layers are stacked between the upper end face of the heating element and the inner top face of the metal casing. Several second mica sheet layers are stacked between the lower end face of the heating element and the inner bottom face of the metal casing. Several third mica sheet layers are stacked between adjacent heating elements. One end of the heating element is connected to a lead wire.

2. The railway turnout de-icing and snow-heating device according to claim 1, characterized in that: The metal outer shell has a hollow structure, and the hollow cavity of the metal outer shell is a core receiving cavity, in which the combined core is sleeved.

3. The railway turnout de-icing and snow-heating device according to claim 2, characterized in that: One side of the metal casing is set as a plane.

4. The railway turnout de-icing and snow-heating device according to claim 3, characterized in that: The inner wall of the core receiving cavity extends toward the plane of the metal shell with an abutting protrusion, which can press the combined cores fitted inside the core receiving cavity tightly against the side close to the plane.

5. A railway turnout de-icing and snow-heating device according to claim 4, characterized in that: A heat-insulating cavity is provided between the abutting boss and the combined wire core, and the heat-insulating cavity is located on both sides of the abutting boss.

6. A railway turnout de-icing and snow-heating device according to any one of claims 1-5, characterized in that: One or both ends of the composite wire core extend out of the end of the metal shell, and the end of the composite wire core extending out of the metal shell is provided with a welding plate, and the lead wire is connected at the welding plate.

7. A railway turnout de-icing and snow-heating device according to any one of claims 1-5, characterized in that: The heating device also includes a metal handle disposed at the end of the metal shell. The ends of the metal shell and the same end of the composite wire core both extend into the metal handle. The metal handle is filled with a temperature-resistant sealing resin for sealing the metal handle, the metal shell, and the composite wire core.

8. A railway turnout de-icing and snow-heating device according to claim 1, characterized in that: The heating element is made of iron-chromium alloy or nickel-chromium alloy.

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