An EMU safety circuit interlock control device
A technology of interlocking control and safety circuit, which is applied to electrical devices, circuits, electric vehicles and other directions to achieve the effect of protecting personal safety
Active Publication Date: 2018-08-03
CRRC QINGDAO SIFANG CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, when the high-voltage equipment on the EMU is inspected and maintained, the high-voltage circuit must be in a state of no electricity to ensure the safety of operators and related equipment
Method used
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Embodiment Construction
[0045] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] see figure 1 , which is a schematic diagram of Embodiment 1 of an EMU safety circuit interlock control device provided by the present invention.
[0047] The EMU safety circuit interlock control device provided in this embodiment includes: a protective earthing switch control branch;
[0048] The protection grounding switch control branc...
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The invention provides a safety circuit interlocking control device for an EMU. The protective grounding switch control branch includes: a series-connected pantograph lifting bow air circuit shut-off valve, a protective grounding switch disconnection gas circuit shut-off valve, and a protective grounding switch disconnection valve. Solenoid valve; when the EMU high-voltage equipment is overhauled and maintained or the external power supply is supplied, the operating protective grounding switch is closed, and the pantograph lifting bow gas circuit cut-off valve cock and the protective grounding switch are turned to disconnect the gas circuit shut-off valve cock to open the key box cover; at the same time, the protective grounding switch control branch is disconnected, the protective grounding switch connected in series in the protective grounding switch control branch is disconnected and the solenoid valve is de-energized, and the protective grounding switch is disconnected and the solenoid valve is de-energized so that the protective grounding switch remains closed; The cover of the key box is locked mechanically through the shut-off valve of the gas path of the pantograph hoist and the shut-off valve of the protective earthing switch. During maintenance of high-voltage equipment or external power supply, the protective grounding switch must be closed to protect the personal safety of maintenance personnel.
Description
technical field [0001] The invention relates to the technical field of EMU safety control, in particular to an EMU safety circuit interlock control device. Background technique [0002] When the EMU is in normal operation, the pantograph is in contact with the catenary, and the catenary provides high-voltage power supply to the EMU. However, when the high-voltage equipment on the EMU is overhauled and maintained, the high-voltage circuit must be in a state of no electricity to ensure the safety of operators and related equipment. [0003] Therefore, those skilled in the art need to provide an EMU safety circuit interlock control device, which can ensure the safety of operators and related equipment when the high-voltage equipment on the EMU is inspected and maintained. Contents of the invention [0004] In order to solve the above technical problems in the prior art, the present invention provides an EMU safety circuit interlock control device, which can ensure the safety...
Claims
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IPC IPC(8): H01H9/26B60L3/00
CPCB60L3/00H01H9/26B60L5/00H01H9/285
Inventor 牛步钊焦京海房新凯吴冬华陶桂东邓桂美
Owner CRRC QINGDAO SIFANG CO LTD