Rigid suspension contact net busbar displacement monitoring device

Abstract

The utility model discloses a rigid suspension catenary busbar displacement monitoring device which comprises an installation base fixedly installed on a busbar, symmetrical supporting supports are formed on the surface of the installation base, and a linear displacement sensor is fixedly installed between the two supporting supports. A host shell is fixedly mounted at the tops of the two supporting seats, a control circuit board and a power supply for supplying power to the control circuit board are mounted in the host shell, and a microprocessor, a low-voltage temperature sensor, a power module and an NB-IOT module are integrated on the control circuit board. According to the utility model, whether the busbar is blocked or not is judged at the first time by monitoring the displacement of the rigid suspension busbar of the overhead line system before the change of contact parameters is caused, thereby ensuring that operation and maintenance personnel have enough time to arrange a skylight point to process an abnormal blocking point; and a foundation is laid for abnormal abrasion analysis of the overhead line system by monitoring the displacement of the rigid suspension busbar of the overhead line system for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway contact network, and in particular relates to a rigid suspension contact network busbar movement monitoring device. Background Art

[0002] The rigid suspension contact network is mainly composed of aluminum alloy busbars, contact wires, insulators and suspension devices. The contact wire is clamped on the busbar, and several busbars are rigidly connected to form an anchor section, and the length of an anchor section is generally 300 meters. The busbar and the contact wire are fixed to the tunnel wall every 6 to 8 meters using wire clamps, insulators, cross braces and other devices. This fixed point is usually called a positioning point. A certain gap is left between the positioning wire clamp and the busbar to allow the busbar to slide in the wire clamp slot due to displacement changes in the line direction caused by temperature changes.

[0003] With the rapid development of urban rail transit, many major cities have opened a number of subway lines powered by rigid suspension. With the increase in operating mileage, some problems with rigid suspension have also been exposed. For example, from December 2023 to February 2024, cities in southern my country experienced heavy rain, snow and freezing weather in winter. Subway operators in many places have reported abnormal wear of pantographs and contact lines. In severe cases, a set of pantograph slides must be replaced after one week of operation of section electric passenger cars. After analysis, it was found that due to the rapid change in temperature, the busbar will have a certain displacement relative to the positioning clamp under the action of thermal expansion and contraction. If the positioning clamp and busbar are stuck at this time, the positioning suspension components insulators, clamps, positioning base channel steel and busbar will produce irremovable stress. Under the action of this stress, the positioning clamp or the positioning point fixing device will be deformed, thereby causing changes in the contact network parameters, changing the bow-net relationship, and causing abnormal wear of the contact network and pantograph.

[0004] At present, when the busbar is stuck, the technical parameters of the contact network will change seriously, which will have a great impact on the current collection of the pantograph. After the electric train driver found that the current collection in this section was unstable, he reported it to the dispatcher. The dispatcher learned about the situation and communicated with the contact network professionals in time, and issued a speed limit driving plan. In order to ensure operation, the contact network professionals were unable to check and deal with it in time. After the operation, it was necessary to arrange an inspection of the contact network to eliminate the busbar stuck fault and other problems caused by the stuck. This method relies on the experience of the electric train driver to find out whether the contact network parameters have changed abnormally, and the missed and false alarm rates are very high, and there is a serious lag. Utility Model Content

[0005] The technical problem to be solved by the utility model is to address the deficiencies of the above-mentioned prior art and to provide a device for monitoring the movement of the rigidly suspended contact network bus. The device can monitor the movement of the rigidly suspended contact network bus and determine whether the bus is stuck in the first time before causing changes in contact parameters, thereby ensuring that operation and maintenance personnel have enough time to arrange window points to deal with abnormal stuck points.

[0006] The technical solution adopted by the utility model is: a rigid suspended contact network bus movement monitoring device, including a mounting base fixedly mounted on the bus, symmetrical support supports are formed on the surface of the mounting base, a linear displacement sensor is fixedly mounted between the two support supports, a host housing is fixedly mounted on the top of the two support supports, a control circuit board and a power supply for powering the control circuit board are installed in the host housing, a microprocessor, a low-voltage temperature sensor, a power module and an NB-IOT module are integrated on the control circuit board, the control circuit board is also connected to the linear displacement sensor, and the antenna of the NB-IOT module is fixed on the outer wall of the host housing.

[0007] Preferably, the mounting base is fixedly mounted on the top surface of the busbar by fixing bolts.

[0008] Preferably, the power supply is formed by a 3.6V-2.0V lithium-ion battery connected in parallel with a supercapacitor.

[0009] The utility model monitors the movement of the rigid suspension bus of the contact network and determines whether the bus is stuck in the first time before causing changes in contact parameters, ensuring that operation and maintenance personnel have enough time to arrange skylight points to deal with abnormal sticking points; and through long-term monitoring of the movement of the rigid suspension bus of the contact network, it lays a foundation for abnormal wear analysis of the contact network. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the interior of the host housing of the utility model;

[0012] Figure 3 This is a schematic diagram of the use of the utility model.

[0013] In the figure: 1. Installation base; 2. Support bracket; 3. Linear displacement sensor; 4. Host housing; 5. Control circuit board; 6. Power supply; 7. Antenna; 8. Bus; 9. Positioning wire clamp. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Example

[0016] like Figure 1 , Figure 2 and Figure 3 As shown, the rigid suspension contact network busbar movement monitoring device provided in this embodiment includes a mounting base 1, the mounting base 1 is fixedly mounted on the top surface of the busbar 8 by fixing bolts, symmetrical support brackets 2 are formed on the surface of the mounting base 1, a linear displacement sensor 3 is fixedly mounted between the two support brackets 2, the linear displacement sensor 3 adopts a precision linear displacement sensor 3, a host housing 4 is fixedly mounted on the top of the two support brackets 2, and a control circuit board 5 and a power supply 6 for powering the control circuit board 5 are installed in the host housing 4;

[0017] The control circuit board 5 is integrated with a microprocessor, a low-voltage temperature sensor, a power module and an NB-IOT module, and the control circuit board 5 is also connected to the linear displacement sensor 3;

[0018] The microprocessor manages the power supply of the linear displacement sensor 3, the low-voltage temperature sensor and the NB-IOT module through the power module; at the same time, the microprocessor is responsible for collecting the displacement data monitored by the linear displacement sensor 3 and the ambient temperature data monitored by the low-voltage temperature sensor, and sends them to the monitoring cloud platform through the NB-IOT module;

[0019] The power supply 6 is composed of a 3.6V-2.0V lithium-ion battery and a supercapacitor in parallel; the selected linear displacement sensor 3, NB-IOT module, low-voltage temperature sensor and microprocessor can all work normally in the 3.6V-2.0V lithium-ion battery discharge range; the lithium-ion battery is connected in parallel with a supercapacitor to meet the requirement of a higher current when the NB-IOT module is started, while reducing the volume of the power supply 6 as much as possible, further reducing the volume of the entire device and improving the stability of the device;

[0020] The antenna 7 of the NB-IOT module is fixed to the outer wall of the host housing 4.

[0021] When in use, the probe of the linear displacement sensor 3 is pre-pressed onto the positioning clamp 9 on the bus 8 according to the ambient temperature, and the displacement data monitored by the linear displacement sensor 3 and the ambient temperature data of the low-voltage temperature sensor are collected in real time through the microprocessor; combined with the temperature change and the installation position of the installation point, the theoretical displacement change of the installation point when the temperature changes is predicted through the temperature deformation model of the bus 8 (aluminum alloy). The theoretical displacement change is the movement of the rigid suspension contact network bus. If the actual displacement change is monitored to be less than a certain range of the theoretical change, it can be determined that the positioning clamp of the anchor section is stuck, and the system issues an early warning and notifies the operation and maintenance personnel to inspect the positioning clamp of the anchor section.

[0022] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A rigid suspension contact network busbar movement monitoring device, characterized in that: The invention comprises a mounting base (1) fixedly mounted on a bus (8), wherein symmetrical support supports (2) are formed on the surface of the mounting base (1), a linear displacement sensor (3) is fixedly mounted between two support supports (2), a host housing (4) is fixedly mounted on the top of the two support supports (2), a control circuit board (5) and a power supply (6) for supplying power to the control circuit board (5) are mounted in the host housing (4), a microprocessor, a low-voltage temperature sensor, a power supply module and an NB-IOT module are integrated on the control circuit board (5), the control circuit board (5) is also connected to the linear displacement sensor (3), and an antenna (7) of the NB-IOT module is fixed to the outer wall of the host housing (4).

2. A rigid suspension contact network busbar movement monitoring device according to claim 1, characterized in that: The mounting base (1) is fixedly mounted on the top surface of the busbar (8) by means of fixing bolts.

3. A rigid suspension contact network busbar movement monitoring device according to claim 1 or 2, characterized in that: The power supply (6) is formed by a 3.6V-2.0V lithium-ion battery connected in parallel with a supercapacitor.

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