Anti-icing composite contact line and temperature monitoring device for electrified railway
By setting insulated electric heating wires and temperature monitoring devices in the contact line, the contact line temperature is automatically adjusted, and the problem of icing of the electrified railway contact line is solved, ensuring the safe and stable operation of the electric locomotive.
Patent Information
- Application Number
- CN202421369522.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The electrified railway contact lines are prone to freezing under low temperature conditions, resulting in poor electrical contact between the pantograph of the electric locomotive and the contact lines, affecting normal operation and even accidents.
An insulated electric heating wire is installed in the contact line and a temperature monitoring device is equipped to automatically adjust the surface temperature of the contact line through heating power supply and temperature sensors to keep it above the freezing point to prevent icing.
It realizes automatic adjustment of the surface temperature of the contact line to prevent icing, ensures the safe and stable operation of the electric locomotive, and has remote monitoring and control functions.
Smart Images
Figure CN223156672U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrical control, and relates to the anti-icing and control technology of the catenary of electrified railways. Specifically, it is an anti-icing composite catenary and temperature monitoring device for electrified railways. Background Art
[0002] At present, the catenary of electrified railways will ice on the surface when the temperature is below freezing point. Especially in freezing rain or extremely cold weather, a relatively thick ice layer will condense on the surface of the catenary. The ice layer will cause poor electrical contact between the pantograph of the electric locomotive and the catenary, affecting the normal operation of the electric locomotive and even resulting in operation accidents. Summary of the Invention
[0003] The purpose of the utility model is to provide an anti-icing composite catenary and temperature control device for electrified railways in view of the problem of icing on the surface of the catenary due to low temperature in electrified railways.
[0004] The technical solution of the composite catenary of the utility model is: an anti-icing composite catenary for electrified railways, including a catenary, characterized in that: an insulating electric heating wire is arranged axially inside the catenary to form a composite catenary; both ends of the insulating electric heating wire are led out radially from the catenary, one end is connected to the catenary, and the other end is led out from the catenary through an insulator.
[0005] In the technical solution of the composite catenary of the utility model, the catenary is a copper alloy wire.
[0006] In the technical solution of the composite catenary of the utility model, the insulating electric heating wire passes through the inside of the copper alloy wire, one end is connected to the first copper terminal arranged on the copper alloy connecting plate, and the other end passes through the copper alloy wire and is connected to the insulating terminal arranged on the third copper alloy connecting plate.
[0007] In the technical solution of the composite catenary of the utility model, one copper connecting plate is welded at each end of the catenary. A copper terminal is arranged on one connecting plate, and an insulating terminal is arranged on the other connecting plate. The insulating electric heating wire is respectively connected to the above two terminals. Near the copper terminal with the insulating terminal on the catenary, another copper connecting plate is welded and provided with a copper terminal as a power access terminal.
[0008] In the technical solution of the composite catenary of the utility model, the insulating electric heating wire is encapsulated with silicone insulating material, which has high and low temperature resistance, oxidation resistance and high insulation performance.
[0009] In the technical solution of the composite catenary of the utility model, a copper alloy outer connecting plate is arranged on the catenary, and a second copper terminal is arranged on the copper alloy outer connecting plate.
[0010] The technical solution of the temperature monitoring device of the present utility model is: an anti-icing composite catenary temperature monitoring device for electrified railways, characterized in that it includes a heating power supply; the heating power supply consists of a step-down transformer and an electric tap-changer; the high-voltage end of the high-voltage side of the step-down transformer is connected to the second copper wiring terminal, and the grounding end is connected to the railway rail and grounded; the step-down transformer has a heating power supply winding and an auxiliary power supply winding; one end of the heating power supply winding is connected to the second copper wiring terminal through the step-down transformer, and the other end is connected to the insulated wiring terminal through the electric tap-changer; the auxiliary power supply winding is connected to an AC / DC converter; the electric tap-changer is equipped with an electric operating mechanism, and the electric operating mechanism pushes the electric tap-changer to open / close.
[0011] In the technical solution of the temperature monitoring device of the present utility model, one end of the low-voltage side of the step-down transformer is connected to the power supply access terminal of the above-mentioned catenary, and the other end is connected to the insulated wiring terminal of the above-mentioned catenary through the electric tap-changer to form an electric heating circuit of the above-mentioned catenary.
[0012] The technical solution of the temperature monitoring device of the present utility model further includes a power supply; the power supply includes a dual-power automatic transfer switch, a storage battery and a solar panel; the dual-power automatic transfer switch has two DC power input terminals, one provided by the solar panel and the storage battery, and the other provided by the AC / DC converter; when the solar panel cannot charge the storage battery due to weather reasons, the dual-power automatic transfer switch switches to the DC power provided by the AC / DC converter to ensure the reliable working power supply of the control device.
[0013] In the technical solution of the temperature monitoring device of the present utility model, the step-down transformer T provides a standby DC power supply "U-; U+". The main and standby DC power supplies are respectively connected to the dual-power automatic transfer switch ATS to form a dual-loop DC working power supply system.
[0014] The technical solution of the temperature monitoring device of the present utility model further includes a temperature intelligent control device; the temperature intelligent control device includes a far-infrared temperature detection device, a controller, a temperature controller and an intelligent terminal.
[0015] In the technical solution of the temperature monitoring device of the present utility model, the far-infrared temperature sensor TE is installed near the above-mentioned contact wire to monitor the surface temperature of the above-mentioned contact wire in a non-contact manner, and the temperature signal is transmitted to the controller PLC. The controller PLC can set the upper limit value and the lower limit value of the freezing point temperature. When the temperature detected by the far-infrared temperature sensor TE is lower than the lower limit value of the freezing point temperature, the controller PLC issues a heating start command to the temperature controller D. At this time, the temperature controller D controls the electric operating mechanism M to push the tap changer K to close, and the above-mentioned contact wire heating circuit is turned on to start heating; when the temperature detected by the far-infrared temperature sensor TE is higher than the upper limit value of the freezing point temperature, the controller PLC issues a stop heating command to the temperature controller D. At this time, the temperature controller D controls the electric operating mechanism M to push the tap changer K to open, and the above-mentioned contact wire heating circuit is disconnected and the heating stops. By the above method, the heating time of the above-mentioned contact wire is automatically adjusted to control its surface above the set freezing point temperature, thereby preventing the above-mentioned contact wire from icing.
[0016] In addition, the controller PLC of the device can transmit the temperature information and the operation status information of the device to the intelligent terminal DTU. The intelligent terminal DTU uploads the received information to the railway back-end system in a wireless manner in real time for display and storage to achieve the remote monitoring function. At the same time, the intelligent terminal DTU can receive the operation instructions sent by the railway back-end system in real time to the controller PLC, and monitor the opening / closing of the electric tap changer K through the controller PLC to remotely control the surface temperature of the above-mentioned composite contact wire. When the surface temperature of the contact wire is lower than the freezing point and icing occurs, the heating power supply automatically energizes the insulating heating wire to increase the surface temperature of the composite contact wire and melt the ice on the surface of the composite contact wire, thereby preventing the surface of the contact wire from icing.
[0017] In the technical solution of the temperature monitoring device of the present utility model, the step-down transformer steps down the railway catenary voltage to provide a heating power supply for the composite contact wire; a solar panel and a storage battery are used as a solar cell to provide a DC working power supply for the device; a far-infrared temperature detection device is used to monitor the surface temperature of the composite contact wire; the controller controls the temperature controller and the electric tap changer to regulate the heating time according to the temperature change monitored by the far-infrared temperature detection sensor, so as to automatically adjust the surface temperature of the composite contact wire; the intelligent terminal can upload the temperature information of the composite contact wire and the operation status information of the monitoring device to the back-end system in real time to achieve the remote monitoring function. At the same time, the intelligent terminal receives the back-end command and monitors the opening / closing of the electric tap changer through the controller to remotely control the surface temperature of the composite contact wire.
[0018] The present utility model is simple, safe, reliable and highly intelligent, and can be widely applied to the anti-icing and de-icing disaster prevention systems of the high-voltage catenary of electrified railways, improving the safe and stable operation ability of electric locomotives, and is mainly used for the anti-icing transformation of the contact wire of electrified railways. Brief Description of the Drawings
[0019] Figure 1 is a schematic structural view of the composite contact wire of the present utility model.
[0020] Figure 2 is Figure 1 the A-A sectional view of
[0021] Figure 3 is the main circuit diagram of the temperature monitoring device of the present utility model.
[0022] Figure 4 is the power supply and control circuit diagram of the temperature monitoring device of the present utility model.
[0023] Reference numerals in the figures: 1 - insulating electric heating wire; 2 - copper alloy wire; 3 - first copper alloy connecting plate; 4 - second copper alloy connecting plate; 5 - third copper alloy connecting plate; 6 - composite contact wire; 7 - rail; T - step-down transformer; K - electric tap switch; PV - solar panel; ATS - automatic dual-power transfer switch; GB - storage battery; TE - far-infrared temperature sensor; DTU - intelligent terminal; PLC - controller; D - temperature controller; M - electric operating mechanism; X1 - first copper terminal; X2 - second copper terminal; X3 - insulating terminal. Detailed Description of the Preferred Embodiment
[0024] The present utility model will be further described below in conjunction with the embodiments.
[0025] As Figure 1 , Figure 2 shown, in an embodiment of the anti-icing composite contact wire for electrified railways of the present utility model, the composite contact wire 6 is composed of a copper alloy wire 2 and an insulating electric heating wire 1. The copper alloy wire 2 has an axial through hole at the center of its cross-section, and both ends thereof are radially perforated and communicated with the axial hole. The insulating electric heating wire 1 passes through the axial through hole of the copper alloy wire 2, and both ends thereof are respectively led out from the radial holes of the copper alloy wire 2. First copper alloy connecting plates 3 and third copper alloy connecting plates 5 are welded to both ends of the copper alloy wire 2, and a second copper alloy connecting plate 4 is welded adjacent to the third copper alloy connecting plate 5. The first copper alloy connecting plate 3 and the second copper alloy connecting plate 4 are respectively provided with a first copper terminal X1 and a second copper terminal X2; the third copper alloy connecting plate 5 is provided with an insulating terminal X3. The insulating electric heating wire 1 is respectively connected to the first copper terminal X1 and the insulating terminal X3; the second copper terminal X2 and the insulating terminal X3 are respectively connected to the temperature monitoring device to form an electric heating power supply circuit.
[0026] As Figure 3 , Figure 4As shown in the figure, an embodiment of the temperature monitoring device for the anti-icing composite catenary of the electrified railway of the present utility model includes two parts: a heating power supply and a temperature monitoring device. The heating power supply part consists of a step-down transformer T and an electric tap switch K. The A end of the high-voltage winding of the step-down transformer T is connected to the second copper terminal X2 of the composite catenary 6, and the B end is connected to the rail 7 and grounded. The step-down transformer T has two low-voltage windings: a-b is the auxiliary power supply winding, which is connected to an AC / DC converter to provide a standby DC power supply "U-; U+" for the temperature monitoring device. e-i is the heating power supply winding. Among them, the e end is connected to the A end at the same potential; the f-i terminals are respectively connected to the electric tap switch K; the movable contact of the electric tap switch K is connected to the insulated terminal X3 end of the composite catenary 6. The electric tap switch K is equipped with an electric operating mechanism M, and the electric operating mechanism M pushes the electric tap switch K to open / close. The second copper terminal X2 and the insulated terminal X3 of the composite catenary 6 are connected to the heating winding e-i end of the step-down transformer T to form a composite catenary heating circuit. When the electric tap switch K is closed, the composite catenary 6 starts to heat; when the electric tap switch K is opened, the composite catenary 6 stops heating.
[0027] The temperature monitoring part consists of a solar panel PV, a storage battery GB, a far-infrared temperature sensor TE, a dual-power automatic transfer switch ATS, a controller PLC, a temperature controller D, and an intelligent terminal DTU.
[0028] The solar panel PV charges the storage battery GB and serves as the main DC power supply for this device. The standby DC power supply "U-; U+" provided by the above step-down transformer T. The main and standby DC power supplies are respectively connected to the dual-power automatic transfer switch ATS to form a dual-loop DC working power supply system.
[0029] The far-infrared temperature sensor TE is installed near the above composite catenary 6 to monitor the surface temperature of the composite catenary 6 in a non-contact manner, and this temperature signal is transmitted to the controller PLC in real time. The controller PLC can set the upper limit value and the lower limit value of the freezing point temperature. When the temperature detected by the far-infrared temperature sensor TE is lower than the lower limit value of the freezing point temperature, the controller PLC sends a start command to the temperature controller D. At this time, the temperature controller D controls the electric operating mechanism M to push the electric tap switch K to close, and the above composite catenary 6 heating circuit is turned on to start heating; when the temperature detected by the far-infrared temperature sensor TE is higher than the upper limit value of the freezing point temperature, the controller PLC sends a stop heating command to the temperature controller D. At this time, the temperature controller D controls the electric operating mechanism M to push the tap switch K to open, and the composite catenary 6 heating circuit is disconnected and the heating stops. By the above method, the heating time of the above composite catenary 6 is automatically adjusted to maintain its surface within a safe range above the set freezing point temperature, so as to prevent the composite catenary 6 from icing.
[0030] In addition, the controller PLC transmits the temperature information and the operation status information of this device to the intelligent terminal DTU. The intelligent terminal DTU uploads the received information to the railway background system wirelessly in real time for display and storage, so as to realize the remote monitoring function. At the same time, the intelligent terminal DTU can receive the operation instructions sent by the background system in real time to the controller PLC, and monitor the opening / closing of the electric tap-changer K through the controller PLC, so as to remotely control and adjust the surface temperature of the composite contact wire 6.
Claims
1. An anti-icing composite catenary for electrified railways, comprising a catenary, characterized in that: An insulating electric heating wire (1) is axially arranged inside the contact wire to form a composite contact wire (6); both ends of the insulating electric heating wire (1) are led out radially from the contact wire, one end is connected to the contact wire, and the other end is led out from the contact wire through an insulator; it includes a heating power supply; the heating power supply is composed of a step-down transformer (T) and an electric tap switch (K); the high-voltage end of the high-voltage side of the step-down transformer (T) is connected to the second copper terminal (X2), and the grounding end is connected to and grounded on the railway rail (7); the step-down transformer (T) has a heating power supply winding and an auxiliary power supply winding; one end of the heating power supply winding is connected to the second copper terminal (X2) through the step-down transformer (T), and the other end is connected to the insulating terminal (X3) through the electric tap switch (K); the auxiliary power supply winding is connected to an AC / DC converter; the electric tap switch (K) is equipped with an electric operating mechanism (M), and the electric operating mechanism (M) pushes the electric tap switch (K) to trip / close.
2. The anti-icing composite catenary for electrified railways according to claim 1, characterized in that: The contact wire is a copper alloy wire (2).
3. The anti-icing composite overhead contact line for electrified railways according to claim 2, characterized in that: The insulating electric heating wire (1) passes through the inside of the copper alloy wire (2), one end is connected to the first copper terminal (X1) arranged on the copper alloy connecting plate (3), and the other end passes through the copper alloy wire (2) and is connected to the insulating terminal (X3) arranged on the third copper alloy connecting plate (5).
4. The anti-icing composite catenary for electrified railways according to claim 1, 2 or 3, characterized in that: The insulating electric heating wire (1) is encapsulated with an insulating silicone insulating material, which has high and low temperature resistance, oxidation resistance and high insulation performance.
5. The anti-icing composite catenary for electrified railways according to claim 1, 2 or 3, characterized in that: A copper alloy outer connecting plate (4) is arranged on the contact wire, and a second copper terminal (X2) is arranged on the copper alloy outer connecting plate (4).
6. A temperature monitoring device for an anti-icing composite catenary for electrified railways described in any one of claims 1-5, characterized in that: It also includes a power supply; the power supply includes a dual-power automatic transfer switch (ATS), a storage battery (GB) and a solar panel (PV); the dual-power automatic transfer switch (ATS) has two DC power input terminals, one is provided by the solar panel (PV) and the storage battery (GB), and the other is provided by the AC / DC converter; when the solar panel (PV) cannot charge the storage battery (GB) due to weather reasons, the dual-power automatic transfer switch (ATS) switches to the DC power provided by the AC / DC converter to ensure the reliable working power of the control device.
7. The temperature monitoring device according to claim 6, characterized in that: It also includes a temperature intelligent control device; the temperature intelligent control device includes a far-infrared temperature detection sensor (TE), a controller (PLC), a temperature controller (D), and an intelligent terminal (DTU).
8. A temperature monitoring device according to claim 7, characterized in that: The step-down transformer (T) steps down the voltage of the railway catenary to provide a heating power supply for the composite contact wire (6); the solar panels (PV) and the storage battery (GB) are used as solar cells to provide a DC working power supply for this device; the far-infrared temperature detection sensor (TE) monitors the surface temperature of the composite contact wire (6); the controller (PLC) controls the temperature controller (D) and the electric tap-changer (K) to regulate the heating time according to the temperature change monitored by the far-infrared temperature detection sensor (TE), so as to automatically adjust the surface temperature of the composite contact wire (6); the intelligent terminal (DTU) can upload the composite contact wire temperature information and the operation status information of this monitoring device to the background system in real time to achieve the remote monitoring function. At the same time, the intelligent terminal (DTU) receives the background instructions and monitors the opening / closing of the electric tap-changer (K) through the controller (PLC) to achieve remote control of the surface temperature of the composite contact wire (6).