×

Interlocking control device of multiple-unit train safety circuit

  • US 10,192,694 B2
  • Filed: 11/17/2016
  • Issued: 01/29/2019
  • Est. Priority Date: 02/26/2016
  • Status: Active Grant
First Claim
Patent Images

1. An interlocking control device for a multiple-unit safety circuit, comprising:

  • a protective grounding switch control branch which comprises;

    a pantograph rising pneumatic circuit cut-off valve, a protective grounding switch turn-off pneumatic circuit cut-off valve and a protective grounding switch turn-off solenoid valve which are connected in series, whereinwhen high-voltage equipment of a multiple-unit train is under inspection and maintenance or is powered by an external power supply, a protective grounding switch is turned on, a cock of the pantograph rising pneumatic circuit cut-off valve and a cock of the protective grounding switch turn-off pneumatic circuit cut-off valve are rotated to open a cover of a key box, the protective grounding switch control branch is disconnected, the protective grounding switch turn-off solenoid valve connected in series in the protective grounding switch control branch is powered off to maintain the protective grounding switch in an on state; and

    the cover of the key box is mechanically locked by means of the pantograph rising pneumatic circuit cut-off valve and the protective grounding switch turn-off pneumatic circuit cut-off valve.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×