Contact line electric heat tracing device
By installing a self-limited temperature electric traction belt and control system on the contact line, keeping the contact line temperature between 30 and 65 degrees Celsius, the problem of contact line icing in low-temperature rain and snow environments is solved, and real-time all-weather deicing of the contact line is achieved. Ensure the safe operation of electric locomotives.
Patent Information
- Application Number
- CN202420460958.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-11
AI Technical Summary
The existing contact lines are prone to freezing in low temperature rain and snow environments, resulting in unstable operation of electric locomotives. The existing deicing method is passive and cannot achieve deicing in real time and all-weather, affecting safe operation.
Design a contact wire electrical heating tracing device with built-in or external self-limiting temperature electrical heating tracing. The electric heating tracing tracing is put into operation in a low temperature environment through the control system, keeping the contact wire temperature between 30 and 65 degrees Celsius, and isolating with insulation 和复合粘贴工艺连接电伴热带,结合牵引变压器和控制柜实现电流发热除冰。
Real-time all-weather deicing of the contact line is realized, ensuring the safe operation of electric locomotives, replacing the traditional passive deicing method, convenient maintenance and can be added on existing contact lines.
Smart Images
Figure CN222262103U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contact wires, in particular to a contact wire electric heating device suitable for places where electric drive is required and the contact wires are prone to icing, such as railways, subways and light rail transportation. Background Art
[0002] The contact wire, also known as the tram wire, is an important component of the contact network and is generally made into a cylindrical shape with grooves on both sides. The grooves are for the convenience of installing wire clamps and suspending the contact wire without affecting the sliding current collection of the pantograph slide. The part of the contact wire that contacts the pantograph slide is in an arc shape, which is called the working surface of the contact wire. The contact wire directly transmits current to the electric locomotive through sliding friction with the pantograph slide on the electric locomotive. Its performance directly affects the current collection quality of the electric locomotive and the safe operation of the locomotive. The contact wire has the worst working environment among all power supply wires. When working normally, it needs to withstand impact, vibration, temperature difference changes, environmental corrosion, wear, electric spark ablation and great working tension. Therefore, its performance directly affects the safe operation of high-speed trains.
[0003] The existing contact line itself does not have a de-icing device. It mainly relies on the two pantographs on the top of the first contact line inspection vehicle. The first pantograph does not take current, but is used to remove ice on the contact line. The second pantograph takes current and drives the contact line inspection vehicle to pass through the icing area at a slow speed. The second method is to manually remove ice using an ice-breaking rod. Both methods are passive de-icing and cannot achieve real-time de-icing around the clock, making it difficult to ensure the safe operation of electric locomotives. Summary of the invention
[0004] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide a contact wire electric heating device, which uses a self-limiting temperature electric heating tape through a built-in or external electric heating tape. When the ambient temperature is below zero and there is rain or snow, the electric heating is put into operation through a control system to keep the contact wire temperature between 30 and 65 degrees Celsius. De-icing can be achieved in real time around the clock to ensure the safe operation of electric locomotives.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a contact wire electric heating device, comprising:
[0006] A contact wire, wherein the contact wire is connected to an electric heating tape, wherein the electric heating tape is connected to an upper region inside the contact wire through a continuous casting process, wherein an insulating barrier is connected inside the contact wire, and wherein the insulating barrier is provided between the electric heating tape and the contact wire conductor.
[0007] Furthermore, the electric heating tape is a self-limiting temperature electric heating tape.
[0008] Furthermore, the electric heating tape is connected to a control cabinet, the control cabinet is arranged in a traction station of the electric locomotive power supply system, the control cabinet is connected to a traction transformer in the traction station, and the control cabinet is used to supply power to the electric heating tape.
[0009] Furthermore, the electric heating tape is provided with a first power supply line and a second power supply line, both of which are connected to the control cabinet, the power supply voltage of the first power supply line is consistent with the contact line voltage, and the second power supply line adjusts the voltage deviation through the control cabinet to form a voltage drop, thereby generating current heating.
[0010] In order to achieve the above-mentioned purpose, the utility model also proposes a contact wire electric heating device, comprising:
[0011] A contact wire, wherein the contact wire is connected to an electric heating tape, the electric heating tape is connected to the outside of the contact wire through a composite pasting process and is arranged at the upper end of the contact wire, and an insulating isolation is provided between the electric heating tape and the contact wire conductor, and the insulating isolation connects the electric heating tape and the contact wire respectively.
[0012] Furthermore, the electric heating tape is a self-limiting temperature electric heating tape.
[0013] Furthermore, the electric heating tape is connected to a control cabinet, the control cabinet is arranged in a traction station of the electric locomotive power supply system, the control cabinet is connected to a traction transformer in the traction station, and the control cabinet is used to supply power to the electric heating tape.
[0014] Furthermore, the electric heating tape is provided with a first power supply line and a second power supply line, both of which are connected to the control cabinet, the power supply voltage of the first power supply line is consistent with the contact line voltage, and the second power supply line adjusts the voltage deviation through the control cabinet to form a voltage drop, thereby generating current heating.
[0015] Compared with the prior art, an embodiment disclosed in the utility model has the following beneficial effects:
[0016] The utility model solves the problem of contact line icing affecting the normal operation of an electric locomotive, replaces the existing deicing method, can realize deicing in real time and around the clock, and ensures the safe operation of the electric locomotive.
[0017] The electric heating tape is set inside the contact wire by continuous casting process and formed in one step; the electric heating tape is set on the top of the contact wire by composite pasting process, which is easy to maintain and can be added to the existing contact wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 and Figure 2 It is a structural schematic diagram of the contact wire electric heating device disclosed in the embodiment of the utility model;
[0019] Figure 3 The utility model is a schematic diagram of the control structure of the contact wire electric heating device disclosed in the embodiment.
[0020] In the figure: 1-contact wire; 2-electric heating tape; 21-first power supply line; 22-second power supply line; 3-pantograph; 4-traction station; 41-traction transformer; 42-control cabinet; 5-return line. DETAILED DESCRIPTION
[0021] The following describes the implementation of the present invention through specific examples and in combination with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0022] Figure 1 This is a schematic diagram of the structure of the contact wire electric heating device disclosed in the embodiment of the utility model. Figure 1 As shown, this embodiment discloses a structure of a built-in contact wire of an electric heating cable, including:
[0023] The contact wire 1 has an electric heating tape 2 connected therein by a continuous casting process, the electric heating tape 2 is insulated from the contact wire conductor, the electric heating tape 2 is connected to the upper part of the contact wire 1, and the lower arc part of the contact wire 1 is in contact with the pantograph 3 of the electric locomotive.
[0024] Figure 2 This is a schematic diagram of the structure of the contact wire electric heating device disclosed in the embodiment of the utility model. Figure 2 As shown, this embodiment discloses a structure of an external contact line of an electric heating cable, including:
[0025] The contact wire 1 and the electric heating tape 2 are connected to the outside of the contact wire 1 by a composite pasting process. The electric heating tape 2 is insulated from the contact wire conductor. The electric heating tape 2 is located at the upper end of the contact wire 1, and the lower arc portion of the contact wire 1 is in contact with the pantograph 3 of the electric locomotive.
[0026] The contact wire includes pure copper, copper alloy, steel-aluminum, and copper-clad steel. Copper alloy includes silver-copper alloy contact wire, tin-copper alloy contact wire, chromium-zirconium-copper alloy contact wire, and magnesium-copper alloy contact wire. The electric heating belt includes a self-limiting temperature electric heating belt and a constant power electric heating belt. In one embodiment of the utility model, the electric heating belt adopts a self-limiting temperature electric heating belt.
[0027] By using any of the above two contact line and electric heating tape connection methods, the contact line temperature can be maintained between 30 and 65 degrees Celsius when the ambient temperature is below zero and there is rain or snow, thus achieving the function of automatic deicing.
[0028] Figure 3 This is a schematic diagram of the control structure of the contact wire electric heating device disclosed in the embodiment of the utility model. Figure 3 As shown, the power supply of the electric locomotive adopts the existing power supply technology, and its equipment includes an electric locomotive, an electric locomotive electric control, a return line 5, a traction station 4, a contact line 2 and a pantograph 3. The traction station 4 is used to convert the electric energy sent from the power plant through the power transmission line into a voltage suitable for the locomotive vehicle, and distribute it to the contact network or the contact rail. The traction station 4 includes a traction transformer 41, a mutual inductor and a switch device, etc., wherein the traction transformer 41 is mainly used for voltage reduction and as a transformer for converting three phases into two phases. In the existing power supply method, the traction station 4 flows the power supply current to the contact line 1 through the traction transformer 41, the pantograph 3 contacts the contact line 1, and the voltage on the contact line 1 flows into the pantograph 3, and then passes through the electric locomotive electric control, flows into the return line 5, and returns to the traction station 4 to form a power supply return. The other parts of the existing power supply method will not be repeated.
[0029] In the embodiment of the utility model, the power supply of the electric heating belt 2 uses the original power supply of the contact line, and a control cabinet 42 is added to the original traction station 4 to power the electric heating system. The control cabinet 42 is connected to the original traction transformer 41, and the current reduced by the traction transformer 41 flows into the contact line 1 in one way and into the control cabinet 42 in the other way. The control cabinet 42 is connected to the electric heating belt 2, and the power supply line connected to the electric heating belt 2 is provided with two ways, namely the first power supply line 21 and the second power supply line 22. Both power supply lines are connected to the control cabinet. The power supply voltage of the first power supply line 21 is consistent with the contact line voltage. The second power supply line 22 adjusts the voltage deviation through the control cabinet 42 to form a voltage drop and generate current heating. In one embodiment of the utility model, the control cabinet 42 is provided with a system network, and remote control can be realized through a variety of methods such as 485 data transmission, modbus, Internet and wireless communication. The remote control method of the system network is an existing technology and will not be repeated here.
[0030] When the ambient temperature is below zero and there is rain or snow, the control cabinet 42 can put the electric heating cable 2 into operation through load voltage regulation, silicon rectification, constant voltage, constant current and other control methods to keep the temperature of the contact wire 1 between 30 and 65 degrees Celsius, thereby achieving automatic deicing. It also has system networking, remote control, temperature regulation and other functions.
[0031] In summary, the utility model discloses a contact wire electric heating device with a built-in or external electric heating tape, and an insulating isolation is arranged between the electric heating tape and the contact wire conductor, and a self-limiting temperature electric heating tape is adopted. When the ambient temperature is below zero degrees and there is rain or snow, the contact wire temperature is maintained between 30 and 65 degrees Celsius, thereby achieving an automatic de-icing function.
[0032] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art may modify and alter the above embodiments without violating the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be as set forth in the claims.
Claims
1. A contact wire electric heating device, comprising a contact wire (1), characterized in that: The contact wire (1) is connected to an electric heating tape (2), the electric heating tape (2) is connected to an upper region inside the contact wire (1) through a continuous casting process, and the contact wire (1) is internally connected with an insulating barrier, the insulating barrier being provided between the electric heating tape (2) and the contact wire conductor.
2. A contact wire electric heating device according to claim 1, characterized in that: The electric heating tape (2) is a self-limiting temperature electric heating tape.
3. A contact wire electric heating device according to claim 1, characterized in that: The electric heating tape (2) is connected to a control cabinet (42), the control cabinet (42) is arranged in a traction station (4) of a power supply system of an electric locomotive, the control cabinet (42) is connected to a traction transformer (41) in the traction station (4), and the control cabinet (42) is used to supply power to the electric heating tape (2).
4. A contact wire electric heating device as claimed in claim 3, characterized in that: The electric heating cable (2) is provided with a first power supply line (21) and a second power supply line (22), the first power supply line (21) and the second power supply line (22) are both connected to the control cabinet (42), the power supply voltage of the first power supply line (21) is consistent with the contact line voltage, and the second power supply line (22) adjusts the voltage deviation through the control cabinet (42), thereby forming a voltage drop and generating current heating.
5. A contact wire electric heating device, comprising a contact wire (1), characterized in that: The contact wire (1) is connected to an electric heating tape (2); the electric heating tape (2) is connected to the outside of the contact wire (1) by a composite bonding process and is arranged at the upper end of the contact wire (1); an insulating barrier is provided between the electric heating tape (2) and the contact wire conductor; the insulating barrier respectively connects the electric heating tape (2) and the contact wire (1).
6. A contact wire electric heating device as claimed in claim 5, characterized in that: The electric heating tape (2) is a self-limiting temperature electric heating tape.
7. A contact wire electric heating device as claimed in claim 5, characterized in that: The electric heating tape (2) is connected to a control cabinet (42), the control cabinet (42) is arranged in a traction station (4) of a power supply system of an electric locomotive, the control cabinet (42) is connected to a traction transformer (41) in the traction station (4), and the control cabinet (42) is used to supply power to the electric heating tape (2).
8. A contact wire electric heating device as claimed in claim 7, characterized in that: The electric heating cable (2) is provided with a first power supply line (21) and a second power supply line (22), the first power supply line (21) and the second power supply line (22) are both connected to the control cabinet (42), the power supply voltage of the first power supply line (21) is consistent with the contact line voltage, and the second power supply line (22) adjusts the voltage deviation through the control cabinet (42), thereby forming a voltage drop and generating current heating.