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Ground state detection unit, grounding device and ground state detection method

A technology of grounding state and detection unit, which is applied in the direction of measuring device, measuring electricity, measuring electric variables, etc., to achieve the effect of direct interlocking judgment basis and reliable detection

Pending Publication Date: 2017-08-04
广州思壮电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the grounding device can be used to control the closing of the grounding switch when the catenary power failure is required, it still faces the problem of whether the grounding switch is reliably closed, that is, whether the closing of the grounding switch contact is reliably grounded. Currently, video display and auxiliary contacts are used. mode to detect the grounding state of the catenary, but these are indirect detection methods, and there are still potential safety hazards

Method used

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  • Ground state detection unit, grounding device and ground state detection method
  • Ground state detection unit, grounding device and ground state detection method
  • Ground state detection unit, grounding device and ground state detection method

Examples

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Embodiment 1

[0053] Such as figure 1 As shown, the grounding state detection unit for the subway track catenary in this embodiment includes a signal current source 1, a signal switch 2, a standard resistor 3 and a signal detection circuit 4, a signal switch 2, a signal current source 1, a standard resistor 3 in series in sequence. The grounding state detection unit is connected to both sides of the grounding switch 5 on the return rail of the catenary, and the signal switching switch 2, the signal current source 1, the standard resistor 3, and the grounding switch 5 form a measurement circuit. The first detection point a is set between the signal changeover switch 2 (grounding switch) and the signal current source 1, the second detection point b is set between the signal current source 1 and the standard resistor 3, and the second detection point b is set between the standard resistor 3 and the grounding switch 5 The third detection point c is set between them, the number of detection poi...

Embodiment 2

[0063] In the foregoing embodiments, the signal detection circuit is a voltage detection circuit. After measuring the voltage at the detection point through the voltage detection circuit, the grounding resistance of the grounding switch is then calculated to determine the grounding state. The difference between this embodiment and Embodiment 1 is that this implementation The signal detection circuit 4 of example is a control module with voltage detection function, such as Figure 4 As shown, the control module is provided with a feedback unit. The feedback unit in this embodiment is a status indicator light. The control module can be a commercially available integrated module with voltage detection function and programming calculation function. The control module collects the voltage data of each detection point Finally, the result is automatically calculated and judged, and the feedback information is fed back through the feedback unit. For example, the green light indicates g...

Embodiment 3

[0066] The difference between this embodiment and embodiment 2 is: as Figure 5 As shown, this embodiment is also provided with an electric control actuator 6 electrically connected to the control module, and the electric control actuator 6 is used to control the opening / closing of the grounding switch 5 and / or the signal switching switch 2 . The control module sends instructions to the electric control actuator 6 to control it to open and close the grounding switch 5 and / or the signal switching switch 2, eliminating the need for manual operation, and realizing remote operation and automatic operation. Further, in this embodiment, a locking device 7 is provided at the grounding switch 5 , the locking device 7 is electrically connected to the control module, and the locking device 7 can lock the grounding switch 5 after the grounding switch 5 is closed. When the control module detects that the grounding switch 5 has been reliably grounded, the control module controls the lockin...

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Abstract

The invention provides a ground state detection unit, a grounding device and a ground state detection method. The ground state detection unit is connected with the two sides of the grounding device. The ground state detection unit comprises a signal current source, a standard resistor and a signal detection circuit. The signal current source is connected with the standard resistor in series. A first detection point is arranged between the signal current source and the grounding switch. A second detection point is arranged between the signal current source and the standard resistor. A third detection point is arranged between the standard resistor and the grounding switch. The signal detection circuit is respectively and electrically connected with the first detecting point, the second detection point and the third detection point so as to measure the voltage among the detection points. According to the technical scheme of the invention, based on the ohm 's law, the grounding state of a contact network can be judged according to the contact resistance of the grounding switch when being switched on. Compared with the existing detection means, the operation is more direct and more reliable.

Description

technical field [0001] The invention belongs to the technical field of electrified state detection, and in particular relates to a grounding state detection unit of a subway track catenary, a grounding device with the grounding state detection unit, and a grounding state detection method. Background technique [0002] With the continuous development of society and science and technology, the subway rail transit industry has also ushered in a period of rapid development. At the same time, higher requirements have been put forward for the efficiency of locomotive operation and maintenance. According to the requirements of safety regulations, the catenary power failure operation will be involved in the maintenance of locomotives. At present, many subway owners use automatic grounding devices to achieve grounding through grounding switches. For example, a Chinese utility model patent with patent number 201320809005. Grounding device in a traffic contact rail system. Although th...

Claims

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Application Information

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IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 钟源
Owner 广州思壮电气股份有限公司
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