Mechanical locking device for high voltage safeguard switch isolation bolts
A technology of isolation plug and high-proof switch, applied in electrical switches, electrical components, circuits, etc., can solve problems such as large short-circuit current, endanger mine and personal safety, etc., and achieve the effect of avoiding malignant accidents
Inactive Publication Date: 2014-03-26
山东华宁矿业集团有限公司
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Problems solved by technology
The isolating pin of the switch has no mechanical lock, so it is impossible to avoid the possibility that the two high-voltage power supply incoming lines in the substation of the underground mining area will be simultaneously powered by the high-proof switch and the contact switch
If the phase sequence of the two high-voltage lines is inconsistent, after parallel operation, it will cause a large short-circuit current, which will seriously endanger the safety of the mine and people.
Method used
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[0010] The mechanical locking device of the high-proof switch isolating pin is composed of three locking retaining rings 1 and two connecting pins 2. The locking retaining ring 1 is provided with an "L"-shaped concave hole 3, and the locking retaining ring 1 is installed on the isolation of the high-proof switch. On the pin sheath 4, fasten the locking retaining ring 1 and the isolating pin sheath 4 with screws, and the connecting pin 2 can be pulled out by using the "L"-shaped concave hole, so that only 2 of them can be powered, and 3 High-defense switches cannot transmit power at the same time.
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The invention relates to a mechanical locking device for high voltage safeguard switch isolation bolts. The device is formed by three locking check rings and two connecting bolts. L-shaped concave holes are formed in the locking check rings which are installed on an isolation bolt protective sleeve of a high voltage safeguard switch, the locking check rings and the isolation bolt protective sleeve are firmly fastened through screws, and the connecting bolts can be pulled out by means of the L-shaped concave holes. The mechanical locking device meets regulation requirements, and the mechanical locking between two incoming line high voltage safeguard switches and an interconnection switch in an electric power substation in a mining area is achieved; terrible accidents like reverse power supply caused by simultaneous power supply of the two incoming line high voltage safeguard switches and the interconnection switch due to wrong operation are avoided.
Description
technical field [0001] The invention relates to a high-defense switch isolating plug mechanical locking device. Background technique [0002] At present, substations in underground mining areas of coal mines in my country mostly use BGP9L series mining explosion-proof high-voltage vacuum power distribution devices (referred to as high-proof switches) as incoming lines and contact switches. The isolating pin of the switch has no mechanical lock, so it is impossible to avoid the possibility of simultaneous power transmission of the two high-voltage power supply incoming high-proof switches and the contact switch in the substation of the underground mining area. If the phase sequence of the two high-voltage lines is inconsistent, after parallel operation, a large short-circuit current will be caused, which will seriously endanger the safety of the mine and people. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present inventi...
Claims
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IPC IPC(8): H01H9/26
Inventor 刘恒平宋庆伟邵鲁新杜波赵慧
Owner 山东华宁矿业集团有限公司