A pantograph maintenance circuit

Abstract

The utility model provides a kind of pantograph overhauling circuit, comprising first air switch, first fuse, first button, second button, first relay, second relay, third relay, first time relay, second time relay, first indicator light, second indicator light, first pressure controller, first differential pressure controller, first solenoid valve;The utility model is innovative design to air path and circuit, when opening U9 valve simulation air path leaks, solenoid valve is disconnected and closed, and total wind source is cut off.Real-time detection and safety control to air path are realized, problems in air path system can be found in time and handled through this innovative scheme, to avoid the occurrence of safety accident, pantograph overhauling work is provided with more safe and reliable guarantee.

Description

Technical Field

[0001] This invention relates to the field of electrical appliances, specifically to a pantograph maintenance circuit. Background Technology

[0002] The pantograph is an electrical device used by rail transit vehicles to obtain power from the overhead contact line. It is a core component of the train's power source and requires regular maintenance and upkeep to ensure its cleanliness, good condition of components, and proper functioning. This ensures the pantograph operates normally and guarantees the safe and stable operation of the train. During pantograph maintenance, the installation and commissioning of the pneumatic circuit is crucial. However, there are certain safety risks involved in the installation and commissioning of the pneumatic circuit. Improper operation during the replacement of pneumatic components and pipelines could potentially cause injury to maintenance personnel from the pneumatic hoses. Utility Model Content

[0003] To address the technical problem that existing pantograph maintenance circuits pose significant safety hazards to maintenance personnel during maintenance work due to improper operation or damage to mechanical components.

[0004] This utility model provides a pantograph maintenance circuit including a first air switch, a first fuse, a first button, a second button, a first relay, a second relay, a third relay, a first time relay, a second time relay, a first indicator light, a second indicator light, a first pressure controller, a first differential pressure controller, and a first solenoid valve.

[0005] The first terminal of the first air switch is connected to the DC positive terminal;

[0006] The first terminal of the first fuse is connected to the second terminal of the first air switch;

[0007] The second end of the first fuse is connected to the first end of the first button and the first end of the second button, the first end of the first differential pressure controller, and the first end of the first solenoid valve, respectively.

[0008] The second end of the first button is connected to the first end of the first pressure controller;

[0009] The second terminal of the first pressure controller is connected to the first terminal of the first time relay, the first terminal of the first relay, and the first terminal of the first indicator light, respectively.

[0010] The second terminal of the first time relay, the second terminal of the first relay, and the second terminal of the first indicator light are respectively connected to the DC negative terminal;

[0011] The second end of the second button is connected to the first end of the second time relay and the first end of the second time relay, respectively.

[0012] The second terminal of the second time relay and the second terminal of the second relay are respectively connected to the negative DC terminal;

[0013] The second terminal of the first differential pressure controller is connected to the first terminal of the third relay and the first terminal of the second indicator light, respectively.

[0014] The second terminal of the third relay and the second terminal of the second indicator light are respectively connected to the DC negative terminal;

[0015] The second end of the first solenoid valve is connected to the DC negative terminal.

[0016] This invention, through innovative design of the gas and electrical circuits, activates a solenoid valve to shut off and cut off the main air supply when the U9 valve is opened to simulate a gas leak. This achieves real-time detection and safety control of the gas circuit. This innovative solution enables timely detection and handling of problems in the gas system, preventing safety accidents and providing a safer and more reliable guarantee for pantograph maintenance. Attached Figure Description

[0017] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0018] The working principle of this utility model is as follows: After closing circuit breaker 21-F01, after opening valve u3, 21-K01 and 21-KT01 are energized and engaged, indicator light 21-H01 lights up, solenoid valve 21-YV01 closes, and after opening valve u9 to simulate gas leakage, 21-B02 detects the gas pressure difference and closes, 21-K03 is energized and engaged, 21-H02 lights up, normally closed contacts 21 and 22 of 21-K03 open, 21-YV01 opens, and the main air supply is cut off.

[0019] This utility model provides a pantograph maintenance circuit including a first air switch, a first fuse, a first button, a second button, a first relay, a second relay, a third relay, a first time relay, a second time relay, a first indicator light, a second indicator light, a first pressure controller, a first differential pressure controller, and a first solenoid valve.

[0020] The first terminal of the first air switch is connected to the DC positive terminal;

[0021] The first terminal of the first fuse is connected to the second terminal of the first air switch;

[0022] The second end of the first fuse is connected to the first end of the first button and the first end of the second button, the first end of the first differential pressure controller, and the first end of the first solenoid valve, respectively.

[0023] The second end of the first button is connected to the first end of the first pressure controller;

[0024] The second terminal of the first pressure controller is connected to the first terminal of the first time relay, the first terminal of the first relay, and the first terminal of the first indicator light, respectively.

[0025] The second terminal of the first time relay, the second terminal of the first relay, and the second terminal of the first indicator light are respectively connected to the DC negative terminal;

[0026] The second end of the second button is connected to the first end of the second time relay and the first end of the second time relay, respectively.

[0027] The second terminal of the second time relay and the second terminal of the second relay are respectively connected to the negative DC terminal;

[0028] The second terminal of the first differential pressure controller is connected to the first terminal of the third relay and the first terminal of the second indicator light, respectively.

[0029] The second terminal of the third relay and the second terminal of the second indicator light are respectively connected to the DC negative terminal;

[0030] The second end of the first solenoid valve is connected to the DC negative terminal.

[0031] The functions of each component in the circuit of this utility model will be described below with reference to the accompanying drawings.

[0032] 21-F01 is the first air switch, which provides overload protection, cuts off voltage to prevent wires from overheating and catching fire, and provides short-circuit protection with manual control of on / off switching.

[0033] 21-F02 is the first fuse, providing short-circuit protection and overload protection.

[0034] 21-S01 is the first button, which realizes the function of restoring the device to its initial state.

[0035] 21-S02 is the second button, which lowers the train pantograph and tests whether the device affects the normal raising and lowering of the pantograph.

[0036] 21-K01 is the first relay, which detects whether the pressure has reached the device's start-up conditions.

[0037] 21-K02 is the second relay, which enables the pantograph to remain in the lowered state.

[0038] 21-K03 is the third relay, which controls the solenoid valve to shut off the gas supply.

[0039] 21-KT01 is a first-time relay, designed to prevent erroneous actions caused by brief pressure fluctuations.

[0040] 21-KT02 is the second time relay, which prevents the pantograph from being raised when it is lowered.

[0041] 21-H01 is the first indicator light, which displays the pressure signal and indicates that high pressure is present.

[0042] 21-H02 is the second indicator light, which sends a signal to shut off the gas supply, indicating that the gas supply has been shut off.

[0043] 21-B01 is the first pressure controller, which converts the pressure signal of the fluid into an electrical signal.

[0044] 21-B02 is the first differential pressure controller, which detects the gas pressure difference.

[0045] 21-YV is the first solenoid valve, which shuts off the main air supply.

[0046] This invention, through innovative design of the gas and electrical circuits, activates a solenoid valve to shut off and cut off the main air supply when the U9 valve is opened to simulate a gas leak. This achieves real-time detection and safety control of the gas circuit. This innovative solution enables timely detection and handling of problems in the gas system, preventing safety accidents and providing a safer and more reliable guarantee for pantograph maintenance.

Claims

1. A pantograph maintenance circuit, comprising a first air switch, a first fuse, a first button, a second button, a first relay, a second relay, a third relay, a first time relay, a second time relay, a first indicator light, a second indicator light, a first pressure controller, a first differential pressure controller, and a first solenoid valve; the first terminal of the first air switch is connected to the positive DC terminal. The first terminal of the first fuse is connected to the second terminal of the first air switch; The second end of the first fuse is connected to the first end of the first button and the first end of the second button, the first end of the first differential pressure controller, and the first end of the first solenoid valve, respectively. The second end of the first button is connected to the first end of the first pressure controller; The second terminal of the first pressure controller is connected to the first terminal of the first time relay, the first terminal of the first relay, and the first terminal of the first indicator light, respectively. The second terminal of the first time relay, the second terminal of the first relay, and the second terminal of the first indicator light are respectively connected to the DC negative terminal; The second end of the second button is connected to the first end of the second time relay and the first end of the second time relay, respectively. The second terminal of the second time relay and the second terminal of the second relay are respectively connected to the negative DC terminal; The second terminal of the first differential pressure controller is connected to the first terminal of the third relay and the first terminal of the second indicator light, respectively. The second terminal of the third relay and the second terminal of the second indicator light are respectively connected to the DC negative terminal; The second end of the first solenoid valve is connected to the DC negative terminal.

Images