Locomotive pantograph lifting method

Abstract

A locomotive pantograph lifting method comprises the following steps that (1) a cab key lifting switch group inputs a pantograph lifting instruction to a mechanical room network module DXM; (2) the inter-machine network module DXM acquires whether pantograph rising conditions meet requirements or not through an information acquisition module; (3) the CCU system receives pantograph rising condition information collected by the machine room network module DXM and rechecks whether pantograph rising conditions meet requirements or not to the machine room network module DXM; (4) the mechanical room network module DXM outputs a pantograph rising instruction to a pantograph rising electromagnetic valve; and (5) when the air pressure of the total air system is greater than 650KPa, the pantograph rising electromagnetic valve is closed, and the pantograph pipeline system is charged with air to enable the pantograph to rise. The accident that a high-voltage contact network discharges electricity to the ground after pantograph rising due to the fact that a locomotive operator does not check the position of a high-voltage grounding switch is solved; and the fault finding time of the main circuit breaker which cannot be closed is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of locomotives, in particular to a locomotive pantograph raising method. Background Art

[0002] During the maintenance and commissioning stage and the normal operation of the HXD1C locomotive, it was found that the pantograph raising conditions lacked the high-voltage grounding switch working position signal collection and the main circuit breaker air supply valve status description in the brake cabinet, resulting in the following problems:

[0003] (1) Because the position signal of the high-voltage grounding switch of the HXD1C locomotive is not collected, when the high-voltage grounding switch is in the grounding position, if the locomotive operator does not confirm the position of the high-voltage grounding switch and performs the pantograph raising operation after checking that the normal pantograph raising conditions are met, a high-voltage contact network of 25Kv will be generated through the roof pantograph - roof high-voltage connecting line - high-voltage grounding switch - car body - wheel - wheel rail - ground, resulting in direct grounding of the high-voltage system and causing accidents such as contact network burning.

[0004] (2) In the pantograph conditions of HXD1C locomotive, the status of the air supply valve of the main circuit breaker in the brake cabinet is not collected. When the above conditions are met and the locomotive pantograph is raised normally, if the air supply valve of the main circuit breaker in the brake cabinet is not in the engaged position, the locomotive operator will close the main circuit breaker. The main circuit breaker cannot be closed and the locomotive cannot operate normally, requiring the locomotive operator to waste a lot of time troubleshooting. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a locomotive pantograph raising method, which solves the problem of high-voltage contact network discharging to the ground after the pantograph is raised due to the locomotive operator not checking the position of the high-voltage grounding switch; and reduces the fault finding time when the main circuit breaker cannot be closed.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a locomotive pantograph raising method, comprising the following steps:

[0007] (1) The key switch group in the driver's cab inputs the bow raising command to the machine room network module DXM;

[0008] (2) The machine network module DXM collects information through the information collection module to determine whether the bow lifting conditions meet the requirements;

[0009] (3) The CCU system receives the bow raising condition information collected by the machine room network module DXM and verifies to the machine room network module DXM whether the bow raising condition meets the requirements;

[0010] (4) The machine network module DXM outputs a pantograph raising command to the pantograph raising solenoid valve;

[0011] (5) When the wind pressure of the total air system is greater than 650KPa, the pantograph raising solenoid valve is energized, and the pantograph pipeline system is filled with air to raise the pantograph;

[0012] The bow raising conditions include: information collection of the high-voltage grounding switch in the operating position, collection of a group of auxiliary interlocking signals in the high-voltage grounding switch, and collection of air supply plug door signals of the main circuit breaker of the brake cabinet.

[0013] As an improvement, two sets of auxiliary interlocks are added to the high-voltage grounding switch, and a set of auxiliary interlock signals of the high-voltage grounding switch is introduced into the B10 point of the machine room network module DXM as the microcomputer network acquisition signal input. Only when the signal is at a low level, the microcomputer system determines that the high-voltage grounding switch is in the working position and allows the output of the pantograph raising signal.

[0014] As an improvement, the information of the high-voltage grounding switch in the operating position is collected through manual inspection or by taking photos for comparison.

[0015] As an improvement, the main air supply valve includes a valve with electrical contacts, and the electrical signal is collected into the microcomputer system to collect the air supply valve signal of the main circuit breaker of the brake cabinet.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A high-voltage earthing switch position status confirmation information collection is added to the brake cabinet stop valve, a set of auxiliary interlocks is added to the high-voltage earthing switch, and the signal is input into the microcomputer control system. The signal is used as one of the conditions for raising the pantograph to solve the high-voltage contact network discharge accident caused by inaccurate position of the high-voltage earthing switch; the signal status of the air supply valve of the main circuit breaker of the brake cabinet is collected through the microcomputer system, and the locomotive crew can confirm whether the air supply valve of the main circuit breaker is in the on position through the microcomputer display screen, which reduces the fault finding time when the main circuit breaker cannot be closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Flow chart for raising the pantograph of a locomotive.

[0019] Figure 2 This is the schematic diagram of the locomotive pantograph raising. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, a locomotive pantograph raising method comprises the following steps:

[0022] (1) The key switch group in the driver's cab inputs the bow raising command to the machine room network module DXM;

[0023] (2) The machine network module DXM collects information through the information collection module to determine whether the bow lifting conditions meet the requirements;

[0024] (3) The CCU system receives the bow raising condition information collected by the machine room network module DXM and verifies to the machine room network module DXM whether the bow raising condition meets the requirements;

[0025] (4) The machine network module DXM outputs a pantograph raising command to the pantograph raising solenoid valve;

[0026] (5) When the wind pressure of the total air system is greater than 650 KPa, the pantograph raising solenoid valve is energized, and the pantograph pipeline system is filled with air to raise the pantograph.

[0027] like Figure 2 As shown, two sets of auxiliary interlocks are added to the high-voltage grounding switch, and a set of auxiliary interlock signals of the high-voltage grounding switch is introduced into the B10 point of the machine room network module DXM as the microcomputer network acquisition signal input. Only when the signal is at a low level, the microcomputer system determines that the high-voltage grounding switch is in the working position and allows the output of the pantograph raising signal.

[0028] The information collection of the high-voltage grounding switch in the operating position is carried out through manual inspection or by taking photos for comparison. Because the high-voltage grounding switch is placed in the operating position or the grounding position, the locomotive blue key must be used for operation. Only when the blue key is inserted into the high-voltage grounding switch can the high-voltage grounding switch conversion handle be operated; and the locomotive blue key is used as the opening key for the pantograph raising condition "the pantograph cut-off valve is in the "CUTIN" position", and it must be inserted into the pantograph cut-off valve normally. To ensure that the high-voltage grounding position is in the operating position before raising the pantograph, the crew must check the position of the high-voltage grounding switch when inserting the blue key into the brake cabinet.

[0029] In view of the fact that the microcomputer system is unable to collect the status of the main circuit breaker air supply valve in the brake cabinet, the main circuit breaker air supply valve is changed from the original mechanical valve valve to a valve with electrical contacts, and the electrical signal is collected in the microcomputer system to prompt the locomotive operator of the position of the main circuit breaker air supply valve.

[0030] The pantograph raising conditions of HXD1C locomotive are composed of the following parts:

[0031]

Claims

1. A locomotive pantograph raising method, characterized in that: The following steps are involved: (1) The key switch group in the driver's cab inputs the bow raising command to the machine room network module DXM; (2) The machine room network module DXM collects information through the information collection module to determine whether the bow raising conditions meet the requirements; (3) The CCU system receives the bow raising condition information collected by the machine room network module DXM and verifies to the machine room network module DXM whether the bow raising conditions meet the requirements; (4) The machine network module DXM outputs a pantograph raising command to the pantograph raising solenoid valve; (5) When the wind pressure of the total air system is greater than 650KPa, the pantograph raising solenoid valve is energized, and the pantograph pipeline system is filled with air to raise the pantograph; The bow raising conditions include: information collection of the high-voltage grounding switch in the operating position, collection of a group of auxiliary interlocking signals in the high-voltage grounding switch, and collection of air supply plug door signals of the main circuit breaker of the brake cabinet.

2. A locomotive pantograph raising method according to claim 1, characterized in that: Two sets of auxiliary interlocks are added to the high-voltage grounding switch, and one set of auxiliary interlock signals of the high-voltage grounding switch is introduced into the B10 point of the machine room network module DXM as the microcomputer network acquisition signal input. Only when the signal is at a low level, the microcomputer system determines that the high-voltage grounding switch is in the working position and allows the output of the pantograph raising signal.

3. A locomotive pantograph raising method according to claim 1, characterized in that: The information of the high-voltage grounding switch in the operating position is collected through manual inspection or by taking photos for comparison.

4. A locomotive pantograph raising method according to claim 1, characterized in that: The main air supply plug gate includes a plug gate with electrical contacts, and the electrical signal is collected into the microcomputer system to collect the air supply plug gate signal of the main circuit breaker of the brake cabinet.

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