Non-contact detection device for a track circuit

Abstract

The utility model discloses a kind of non-contact detection devices of track circuit, belong to track detection field, including several track and the track circuit of detecting vehicle operating state, the track circuit includes power supply, binary two-position relay located in track one side and the wire of connecting two tracks, binary two-position relay and power supply.The utility model is compared with prior art in the advantages that: the device will traditional multimeter detection track circuit method change to through electromagnetic induction mode and carry out non-contact detection, the magnetic field intensity of binary two-position relay is detected by Hall sensor, when failure occurs, binary two-position relay electromagnet weakens or disappears, and when normal, magnetic field is stronger, to adsorb armature, wherein Hall sensor can convert the change of magnetic field into electrical signal, and change is analyzed by analyzer, to ensure the safety of detection personnel.

Description

Technical Field

[0001] This utility model relates to the field of track inspection, specifically to a non-contact inspection device for track circuits. Background Technology

[0002] In the current operation of trains, in order to quickly locate the position and displacement speed of the train, corresponding sensing devices, namely track circuits, are usually installed on the track. The position of the train is determined by the change in current of the track circuit when the train passes by. By combining the changes of multiple tracks, the analysis and control room receiving the track circuit can analyze the movement trajectory of the train and thus rationally arrange the movement of each vehicle on the track.

[0003] The existing track circuit includes a power supply, a binary 2-position relay located on one side of the track, and wires connecting the two tracks, the binary 2-position relay, and the power supply. When a train passes over this section of track, a short circuit is formed, causing the output current or voltage to increase rapidly, thus determining the train's position. However, since the track circuit is located outdoors for a long time and vibrations occur when a train passes over it, the connecting wires are prone to breakage. To ensure the accuracy of the detection, quality inspectors usually need to conduct regular inspections.

[0004] Existing testing methods typically use multimeters, but because the testing leads need to be manually placed on the track or testing circuit during testing, accidental electric shock may occur due to accidental contact, potentially causing injury to inspection personnel. Utility Model Content

[0005] The technical problem this invention aims to solve is that existing track circuit detection devices typically require contact with the circuit or track, making it difficult to guarantee the safety of inspection personnel.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a non-contact detection device for track circuits, comprising several sections of track and a track circuit for detecting the running status of a vehicle, wherein the track circuit includes a power supply, a binary two-position relay located on one side of the track, and wires connecting the two tracks, the binary two-position relay, and the power supply.

[0007] A non-contact electrical measuring device is provided on one side of the binary two-position relay. The non-contact electrical measuring device includes a Hall sensor for detecting the state of the electromagnetic coil inside the binary two-position relay, a protective shell for controlling the position of the Hall sensor, an analyzer for receiving electromagnetic changes of the Hall sensor, and an insulating telescopic rod connecting the protective shell and the analyzer.

[0008] The protective shell includes a main shell connecting an insulating telescopic rod, a detection plate storing a Hall sensor, and a sliding ball located at the top of the shaft of the detection plate. The interior of the main shell is provided with a ball groove for controlling the sliding ball, and the side wall of the ball groove is provided with a rolling groove for limiting the displacement range of the sliding ball.

[0009] As an improvement, a storage slot for the recovery detection plate is provided on one side of the main shell.

[0010] As an improvement, an insulating pad is provided below the detection plate.

[0011] As an improvement, sleepers connected by fasteners are provided below the track.

[0012] As an improvement, the tracks described in each section are connected by an insulating connecting plate.

[0013] As an improvement, both the main housing and the analyzer are connected to the two ends of the insulating telescopic rod via a pin structure.

[0014] The advantages of this invention compared to existing technologies are as follows: This device replaces the traditional method of using a multimeter to test track circuits with a non-contact method of electromagnetic induction. It uses a Hall sensor to detect the magnetic field strength of a binary two-position relay. When a fault occurs, the electromagnet of the binary two-position relay weakens or disappears, while under normal conditions, the magnetic field is strong enough to attract the armature. The Hall sensor can convert the change in magnetic field into an electrical signal, which is then analyzed by an analyzer, thus ensuring the safety of the testing personnel. Attached Figure Description

[0015] Figure 1 This is a general structural diagram of a non-contact detection device for track circuits according to this utility model.

[0016] Figure 2 This is a schematic diagram of the track circuit structure of a non-contact detection device for track circuits according to this utility model.

[0017] Figure 3 yes Figure 2 Enlarged view of point A.

[0018] Figure 4 This is a structural diagram of a non-contact electrical measuring device for a track circuit, according to this utility model.

[0019] Figure 5 This is a cross-sectional view of a non-contact electrical measuring device for a track circuit, according to this utility model.

[0020] Figure 6 This is a circuit diagram of the track circuit of a non-contact detection device for track circuits according to this utility model.

[0021] As shown in the figure: 1. Track; 11. Fastener; 12. Sleeper; 13. Insulating connecting plate; 2. Track circuit; 21. Power supply; 22. Binary two-position relay; 23. Wire; 3. Non-contact measuring device; 31. Hall sensor; 32. Protective shell; 321. Main shell; 322. Detector plate; 323. Sliding ball; 324. Rolling ball groove; 3241. Rolling groove; 3242. Storage groove; 325. Insulating gasket; 33. Analyzer; 34. Insulating telescopic rod. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] As per the instruction manual Figure 1 , 2 As shown in Figures 3 and 6, the existing method of fixing railway track 1 involves laying sleepers 12 on top of the roadbed, and then fixing track 1 to the sleepers 12 using fasteners 11. To ensure that the track circuits 2 of each section of track 1 do not interfere with each other, the structural components connecting each section of track 1 use insulating connecting plates 13. The track circuit 2 consists of a power supply 21, a binary two-position relay 22 located on one side of track 1, and wires 23 connecting the two tracks 1, the binary two-position relay 22, and the power supply 21. The binary two-position relay 22 contains two alternating electromagnetic systems: a local coil and a track coil. The local coil is fixedly energized, such as at 110V and 25Hz, while the track coil is connected in series in the track circuit. The current changes according to the state of the track circuit, such as when a train occupancy causes changes. When the track coil is energized, an alternating magnetic field is generated around the iron core. This magnetic field interacts with the alternating magnetic flux of the local coil to form an electromagnetic torque that drives the armature to move. The energizing structure of track circuit 2 and its changes after a train passes are common technologies in the prior art, and therefore will not be described in detail.

[0024] As per the instruction manual Figure 4 , 5 As shown, since the binary two-position relay 22 uses the attraction of an electromagnet and an armature to control the circuit, a fault in the binary two-position relay 22 can be detected by the change of the electromagnet. To ensure safety during detection, a non-contact detection device is used. The non-contact measuring device 3 includes a Hall sensor 31 that detects the state of the electromagnetic coil inside the binary two-position relay 22, a protective shell 32 that controls the position of the Hall sensor 31, an analyzer 33 that receives the electromagnetic changes of the Hall sensor 31, and an insulating telescopic rod 34 that connects the protective shell 32 and the analyzer 33. The Hall sensor 31 can detect not only the strength of the magnetic field, but also the direction and stability of the magnetic field. Its working principle is based on the Hall effect. When current passes through a conductor and a magnetic field perpendicular to the direction of the current exists, a potential difference, i.e., a Hall voltage, is generated on both sides of the conductor, which is related to the strength and direction of the magnetic field.

[0025] The data from the Hall sensor 31 is connected to the analyzer 33 via a data cable, and both the main housing 321 and the analyzer 33 are connected to both ends of the insulating telescopic rod 34 via a pin structure.

[0026] To protect the Hall sensor 31, the protective shell 32 includes a main shell 321 connecting the insulating telescopic rod 34, a detection plate 322 storing the Hall sensor 31, and a sliding ball 323 located at the top of the shaft of the detection plate 322. The main shell 321 has a ball groove 324 inside to control the sliding ball 323, and the side wall of the ball groove 324 has a rolling groove 3241 to limit the displacement range of the sliding ball 323. The movable structure of the detection plate 322 can refer to the one-axis rotation structure of a dial indicator, but the rotation angle of the detection plate 322 is only 90° in one direction. In order to prevent the Hall sensor 31 from accidentally touching the high voltage circuit, an insulating pad 325 is provided below the detection plate 322.

[0027] To prevent the Hall sensor 31 from being damaged by external forces when not in use, a storage slot 3242 for recycling the detection plate 322 is provided on one side of the main body shell 321.

[0028] In specific implementation of this utility model, during inspection, the sensor rotates 90° around the rolling groove 3241 and then rotates 180°, causing the detection plate 322 to slide out of the storage groove 3242, so that the sensing direction of the Hall sensor 31 is downward, and it is placed on the binary two-position relay 22 to detect the state of the electromagnet inside the binary two-position relay 22 and determine whether it is energized. At the same time, the magnetic field strength of the electromagnet is determined, thereby determining the state of the binary two-position relay 22, which is used to analyze whether there is a fault in the track circuit 2 of this section of track 1, thereby ensuring data detection when the train passes.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A non-contact detection device for a track circuit, comprising several sections of track (1) and a track circuit (2) for detecting the running status of a vehicle, wherein the track circuit (2) comprises a power supply (21), a binary two-position relay (22) located on one side of the track (1), and a wire (23) connecting the two tracks (1), the binary two-position relay (22), and the power supply (21), characterized in that: A non-contact measuring device (3) is provided on one side of the binary two-position relay (22). The non-contact measuring device (3) includes a Hall sensor (31) for detecting the state of the electromagnetic coil inside the binary two-position relay (22), a protective shell (32) for controlling the position of the Hall sensor (31), an analyzer (33) for receiving electromagnetic changes of the Hall sensor (31), and an insulating telescopic rod (34) connecting the protective shell (32) and the analyzer (33). The protective shell (32) includes a main shell (321) connecting the insulating telescopic rod (34), a detection plate (322) storing the Hall sensor (31), and a sliding ball (323) located at the top of the shaft of the detection plate (322). The interior of the main shell (321) is provided with a ball groove (324) for controlling the sliding ball (323), and the side wall of the ball groove (324) is provided with a rolling groove (3241) for limiting the displacement range of the sliding ball (323).

2. The non-contact detection device for a track circuit according to claim 1, characterized in that: The main body shell (321) is provided with a storage slot (3242) for the recovery detection plate (322) on one side.

3. The non-contact detection device for a track circuit according to claim 2, characterized in that: An insulating pad (325) is provided below the detection plate (322).

4. The non-contact detection device for a track circuit according to claim 1, characterized in that: Below the track (1) are sleepers (12) connected by fasteners (11).

5. A non-contact detection device for a track circuit according to claim 4, characterized in that: The tracks (1) described in each section are connected by an insulating connecting plate (13).

6. The non-contact detection device for a track circuit according to claim 1, characterized in that: Both the main shell (321) and the analyzer (33) are connected to both ends of the insulating telescopic rod (34) via a pin structure.

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