A control method of a coal mine underground electric power box returning line device with an external expansion device
A technology for downhole power and control methods, applied in switchgear, electrical components, etc., can solve the problems of gap generation and downhole gas entering the inside of the pipe body, and achieve the effect of expanding space and reducing concentration
Inactive Publication Date: 2018-12-21
刘少銮
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Problems solved by technology
[0003] When performing line connection and disassembly, the existing line withdrawal device with application number 201711300099.7 is simpler and more convenient than the traditional closed box operation. The line withdrawal device discharges most of the gas into the other side of the piston plate by squeezing the gas , but the piston plate is provided with a through hole, which does not seal the exhausted gas. When the arc ignites the residual gas, the exhausted gas can re-enter the arc through the through hole to provide gas to explode, and the bellows are bonded together. If there are many lines crossing the corrugated pipe, it cannot be fully fitted, and gaps are likely to occur, allowing downhole gas to enter the interior of the pipe body
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.
[0028] see Figure 1-3 , the present invention provides a technical scheme of a coal mine underground power box withdrawal device with an external expansion device: its structure includes an air bag 1, a pipe body 2, a piston rod 3, a piston 4, a sealing plate 5, an external expansion device 6, and an air outlet 7 , sealing plate 8, spout fitting device 9, described pipe body 2 interior is provided with piston 4, and described piston 4 is vertically connected ...
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The invention discloses a control method of a coal mine underground electric power box returning line device with an external expansion device, A device has a structure comprising an air bag, a Pipe body, a piston rod, a piston, a sealing plate, an external expansion device, an Air outlet, a sealing plate, a nozzle fitting device, The piston is arranged inside the pipe, the piston is vertically connected to the piston rod, A top end of that piston rod penetrates out of the top of the tube body and is connected with an air bag, A closure plate is fixed in the inner part of the pipe and arrangedbelow the piston, A through hole is arranged in the middle of the sealing plate, the through hole is fitted with the sealing plate, A seal plate is attached to the piston rod and located below the piston, The bottom of the pipe body is connected to a nozzle bonding device, The two side of the pipe body are respectively provided with air outlet hole, An external expansion device is connected to the outside of the air outlet hole. The invention has the beneficial effects that the working surface can be fully fitted by rubber pipe nozzle and rubber mud filling, the air is sealed by extracting air, the working space is expanded to reduce the concentration of residual gas, and the gas is insufficient to explode with the electric arc, so that the invention is more safe and reliable.
Description
technical field [0001] The invention relates to the field of coal mine power boxes, in particular to a control method for a coal mine underground power box withdrawal device with an external expansion device. Background technique [0002] In order to prevent the electric arc generated by the line node and the explosion of underground gas, the electric box in the coal mine adopts an explosion-proof structure. [0003] When performing line connection and disassembly, the existing line withdrawal device with application number 201711300099.7 is simpler and more convenient than the traditional closed box operation. The line withdrawal device discharges most of the gas into the other side of the piston plate by squeezing the gas , but the piston plate is provided with a through hole, which does not seal the exhausted gas. When the arc ignites the residual gas, the exhausted gas can re-enter the arc through the through hole to provide gas to explode, and the bellows are bonded tog...
Claims
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IPC IPC(8): H02B3/00
CPCH02B3/00
Inventor 刘少銮
Owner 刘少銮