Residual voltage relief device for rail transit visual grounding device

Abstract

The utility model discloses a residual voltage relief device for a rail transit visual grounding device, which belongs to the technical field of rail transit residual voltage relief and comprises a contact network, a live detection control device, a residual voltage discharge device, a core controller, an internal power supply and a contact network closing switch. The live detection control device is connected with one end of the first high-voltage fuse, one end of the second high-voltage fuse and a walking rail of the contact network; the residual voltage discharge device is connected with one end of the first high-voltage fuse, a walking rail of the contact network, the core controller and a 0V port of the internal power supply; the core controller is connected with a + 24V port of an internal power supply of the device; and the other end of the first high-voltage fuse and the other end of the second high-voltage fuse are both connected with a contact rail of the overhead line system. According to the utility model, the additional residual voltage relief device is added on the visual grounding device, so that the residual voltage relief after the overhead line system is powered off can be accelerated, the time for waiting for voltage reduction by an operation unit is shortened, and the overhaul and maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the track traffic residual voltage relief technical field, concretely relates to a residual voltage relief device for track traffic visual grounding device. BACKGROUND

[0002] The existing visual grounding device generally collects the catenary voltage through the sensor, judges whether the catenary is electrified through the voltage size, allows the closing of the electrified grounding device, and prohibits the closing of the electrified grounding device. The judgment logic generally adopts whether the collected voltage is greater than a certain voltage value to confirm whether the catenary is electrified, and the actual catenary may still have a high voltage on the line due to the influence of various electrical elements on the line after power failure, and this voltage will remain for a long time due to the lack of discharge loop.

[0003] The existing grounding device does not set such a device, and when the above high voltage occurs after the power failure of the catenary, the operating unit needs to wait for a long time until the voltage drops to the allowable operating voltage or manually hangs the grounding wire to discharge the catenary voltage before the grounding switch can be normally operated, which increases the maintenance time of the operating unit and has a great impact on the grounding device using unit. SUMMARY

[0004] In view of the above problems in the prior art, the residual voltage relief device for the track traffic visual grounding device provided by the utility model solves the problem of slow residual voltage relief after the power failure of the catenary, which affects the closing of the catenary grounding switch.

[0005] In order to achieve the above utility model purposes, the utility model adopts the technical scheme that a residual voltage relief device for a track traffic visual grounding device comprises a catenary, a live detection control device, a residual voltage discharge device, a core controller, an internal power supply and a catenary closing switch.

[0006] The live detection control device is connected with one end of the first high-voltage fuse, one end of the second high-voltage fuse and the running rail device of the catenary respectively.

[0007] The residual voltage discharge device is connected with one end of the first high-voltage fuse, the running rail of the catenary, the core controller and the 0V port of the internal power supply respectively.

[0008] The core controller is connected with the +24V port of the internal power supply.

[0009] One end of the catenary closing switch is connected with the contact rail of the catenary, and the other end of the catenary closing switch is connected with the running rail of the catenary.

[0010] The other end of the first high-voltage fuse and the other end of the second high-voltage fuse are both connected with the contact rail of the catenary.

[0011] The utility model discloses the beneficial effect is: the utility model adds the additional residual voltage relief device on the visual grounding device, can accelerate the residual voltage relief after the contact net power failure, facilitates the grounding operation of grounding device, shortens the time of operation unit waiting voltage reduction, improves the efficiency of overhaul and maintenance, simultaneously, when the contact net power failure, the core controller device can according to control strategy, automatic or manual investment residual voltage relief circuit, accelerates the contact net residual voltage discharge speed, improves the grounding operation efficiency of grounding device.

[0012] Further: the J2-1 interface of residual voltage discharge device is connected with one end of the first high-voltage fuse, the J1-2 interface of residual voltage discharge device is connected with the running rail of contact net, the J3-2 interface of residual voltage discharge device is connected with the 0V port of internal power supply, and the J3-1 interface of residual voltage discharge device is connected with the core controller.

[0013] Further: the residual voltage discharge device includes high-voltage resistance and high-voltage relay.

[0014] One end of the high-voltage resistance is used as the J2-1 interface of residual voltage discharge device, the other end of the high-voltage resistance is connected with the first port of the high-voltage relay, the second port of the high-voltage relay is used as the J1-2 interface of residual voltage discharge device, the third port of the high-voltage relay is used as the J3-2 interface of residual voltage discharge device, and the fourth port of the high-voltage relay is used as the J3-1 interface of residual voltage discharge device.

[0015] Further: the J3-3 interface of the core controller is connected with the 24V port of internal power supply, and the J3-4 interface of the core controller is connected with the J3-1 interface.

[0016] Further: the YBS1-6 interface of the first direct-current transmitter in the live detection control device is connected with one end of the second high-voltage fuse, the YBS2-6 interface of the second direct-current transmitter in the live detection control device is connected with one end of the first high-voltage fuse, and the YBS1-5 interface of the first direct-current transmitter in the live detection control device and the YBS2-5 interface of the second direct-current transmitter in the live detection control device are connected with the running rail device of contact net. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a residual voltage relief device structure diagram for visual grounding device of rail transit.

[0018] Figure 2 It is residual voltage discharge device structure diagram. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model are described below to facilitate the understanding of the utility model by those skilled in the art, but it should be clear that the utility model is not limited to the scope of the specific embodiments, and for those skilled in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, and all utility model creations utilizing the concept of the utility model are within the scope of protection.

[0020] As Figure 1 The utility model discloses a residual voltage discharge device for track traffic visual grounding device, including contact net, live detection control device, residual voltage discharge device, core controller, internal power supply and contact net switch -on switch.

[0021] Live detection control device is connected with one end of first high voltage fuse, one end of second high voltage fuse and the walking rail device of contact net respectively.

[0022] Residual voltage discharge device is connected with one end of first high voltage fuse, the walking rail of contact net, core controller and 0V port of internal power supply respectively.

[0023] Core controller is connected with + 24V port of device internal power supply.

[0024] One end of contact net switch -on switch is connected with the contact rail of contact net, and the other end of contact net switch -on switch is connected with the walking rail of contact net.

[0025] The other end of first high voltage fuse and the other end of second high voltage fuse are connected with the contact rail of contact net.

[0026] Among them, live detection control device, core controller and contact net switch -on switch are all existing devices, the J2-1 interface of residual voltage discharge device is connected with one end of first high voltage fuse, the J1-2 interface of residual voltage discharge device is connected with the walking rail of contact net, the J3-2 interface of residual voltage discharge device is connected with 0V port of internal power supply, and the J3-1 interface of residual voltage discharge device is connected with core controller.

[0027] The J3-3 interface of core controller is connected with 24V port of internal power supply, and the J3-4 interface of core controller is connected with J3-1 interface.

[0028] The YBS1-6 interface of first direct current transmitter in live detection control device is connected with one end of second high voltage fuse, the YBS2-6 interface of second direct current transmitter in live detection control device is connected with one end of first high voltage fuse, and the YBS1-5 interface of first direct current transmitter in live detection control device and the YBS2-5 interface of second direct current transmitter in live detection control device are all connected with the walking rail device of contact net.

[0029] like Figure 2 As shown, this is a residual voltage discharge device, which includes a high-voltage resistor and a high-voltage relay. One end of the high-voltage resistor serves as the J2-1 interface of the residual voltage discharge device, and the other end of the high-voltage resistor is connected to the first port of the high-voltage relay. The second port of the high-voltage relay serves as the J1-2 interface of the residual voltage discharge device, the third port of the high-voltage relay serves as the J3-2 interface of the residual voltage discharge device, and the fourth port of the high-voltage relay serves as the J3-1 interface of the residual voltage discharge device.

[0030] The working state and distance of this utility model are described below:

[0031] First, the relevant parameters are defined as follows:

[0032] Standard voltage value for overhead contact lines: Un=1500V;

[0033] The threshold voltage for starting the discharge device is 0.6Un, which is 0.6 × 1500 = 900V. This value can be adjusted according to actual needs.

[0034] Permissible grounding operation threshold voltage: 0.4Un, i.e., 0.4 × 1500 = 600V, which can be adjusted according to actual needs;

[0035] Discharge operation waiting delay constant: T, generally taken as 30s, can be adjusted according to actual needs;

[0036] Real-time voltage value of the overhead contact line: V; Previous measurement value of the overhead contact line: Vn-1; Current measurement value of the overhead contact line: Vn.

[0037] Each visual grounding device is redundantly equipped with two DC voltage transmitters, which are connected to the contact network through a high-voltage DC fuse, equivalent to two small loads. When the contact network isolating switch is opened, the contact network voltage gradually decreases under the influence of the two DC voltage transmitters. When the voltage drops to 0.6Un, i.e. 900V, the residual voltage discharge device of this utility model is automatically activated to accelerate the residual voltage discharge process of the contact network.

[0038] Each time the contact network voltage value monotonically decreases from V > 0.6 Un (900V) to V < 0.6 Un (900V), the residual voltage discharge device of this utility model triggers a residual voltage self-discharge process. After completion, a "self-discharged" flag is set to limit the self-discharge to below 0.6 Un (900V) to trigger it again.

[0039] Each time the contact network voltage value monotonically increases from V < 0.6 Un (900V) to V > 0.6 Un (900V), the "self-discharged" flag is cleared, allowing the residual voltage discharge device to trigger self-discharge when the conditions are met.

[0040] The beneficial effects of this utility model are as follows: This utility model adds an additional residual voltage discharge device to the visual grounding device, which can accelerate the discharge of residual voltage after the contact network is de-energized, facilitate the grounding operation of the grounding device, shorten the waiting time for the operating unit to reduce the voltage, and improve the efficiency of inspection and maintenance. At the same time, when the contact network is de-energized, the core controller device can automatically or manually activate the residual voltage discharge circuit according to the control strategy, accelerate the discharge speed of residual voltage in the contact network, and improve the grounding operation efficiency of the grounding device.

Claims

1. A residual voltage venting device for a visual grounding device in rail transit, characterized in that, It includes the overhead contact line, live detection and control device, residual voltage discharge device, core controller, internal power supply, and overhead contact line closing switch; The live detection and control device is connected to one end of the first high-voltage fuse, one end of the second high-voltage fuse, and the traveling rail device of the contact wire, respectively. The residual voltage discharge device is connected to one end of the first high-voltage fuse, the travel rail of the contact wire, the core controller, and the 0V port of the internal power supply, respectively. The core controller is connected to the +24V port of the device's internal power supply; One end of the contact wire closing switch is connected to the contact rail of the contact wire, and the other end of the contact wire closing switch is connected to the traveling rail of the contact wire. The other end of the first high-voltage fuse and the other end of the second high-voltage fuse are both connected to the contact rail of the overhead contact line.

2. The residual voltage venting device for a visual grounding device in rail transit according to claim 1, characterized in that, The J2-1 interface of the residual voltage discharge device is connected to one end of the first high-voltage fuse, the J1-2 interface of the residual voltage discharge device is connected to the traveling rail of the contact network, the J3-2 interface of the residual voltage discharge device is connected to the 0V port of the internal power supply, and the J3-1 interface of the residual voltage discharge device is connected to the core controller.

3. The residual voltage venting device for a visual grounding device in rail transit according to claim 2, characterized in that, The residual voltage discharge device includes a high-voltage resistor and a high-voltage relay; One end of the high-voltage resistor serves as the J2-1 interface of the residual voltage discharge device, and the other end of the high-voltage resistor is connected to the first port of the high-voltage relay. The second port of the high-voltage relay serves as the J1-2 interface of the residual voltage discharge device, the third port of the high-voltage relay serves as the J3-2 interface of the residual voltage discharge device, and the fourth port of the high-voltage relay serves as the J3-1 interface of the residual voltage discharge device.

4. The residual voltage venting device for a visual grounding device in rail transit according to claim 2, characterized in that, The J3-3 interface of the core controller is connected to the 24V port of the internal power supply, and the J3-4 interface of the core controller is connected to the J3-1 interface.

5. The residual voltage venting device for a visual grounding device in rail transit according to claim 1, characterized in that, The YBS1-6 interface of the first DC transmitter inside the live-line detection and control device is connected to one end of the second high-voltage fuse, the YBS2-6 interface of the second DC transmitter inside the live-line detection and control device is connected to one end of the first high-voltage fuse, and both the YBS1-5 interface of the first DC transmitter and the YBS2-5 interface of the second DC transmitter inside the live-line detection and control device are connected to the contact wire traveling rail device.

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