A buckle structure on the door frame of a mine explosion-proof box
A buckle structure and explosion-proof box technology, which is applied to the substation/distribution device shell, etc., can solve the problems of insufficient fastening of the explosion-proof surface, difficult assembly, and high processing accuracy, so as to prevent the gap between the explosion-proof surface from suddenly becoming large, The effect of low machining accuracy requirements and simple structure
Active Publication Date: 2015-09-30
明创慧远(长沙)矿山设计研究院有限公司
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Problems solved by technology
In the explosion-proof field of coal mines, the common buckle structure of the door frame of the explosion-proof box, the positioning block and the buckle fitting surface are parallel to the flange surface of the sealed door, and there is no inclination. Such a structure requires a high degree of fit between the insert and the buckle. It is easy to cause the two explosion-proof surfaces to be not fastened enough. When sparks are generated in the explosion-proof box, it is easy to cause accidents at the junction between the sparks and the external air.
Compared with some explosion-proof boxes with no buckle structure on the door frame, since there is no buckle structure for fastening, there is no problem within a certain period of time, but as time goes by, the explosion-proof surface is likely to have a large enough gap to allow sparks to escape from the explosion-proof surface. escape, resulting in an accident
[0003] Therefore, it is difficult to ensure that the gap between the explosion-proof surface meets the requirements of the non-sloping buckle structure and the non-sloping buckle structure, and the cooperation between the non-sloping buckle and the positioning block has high processing precision, and the assembly is difficult
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[0026] refer to Figure 1-Figure 4 , a buckle structure on the door frame of a mine explosion-proof box, each set of buckle structure includes a positioning block 1 and a buckle 2, the positioning block 1 is set on the flange 3 of the box body, and the buckle 2 is set on the flange of the airtight door 5, the positioning block 1 has an inclined surface, that is, the inclined surface of the positioning block 7, and the inner side of the upper end protrusion of the buckle 2 is provided with a buckle inclined surface 8 that matches the inclined surface 7 of the positioning block, and the lower end The protruding part is provided with buckle counterbore 9, and multiple sets of buckle structures are symmetrically arranged on the box body flange 3 and the sealing door flange 5 up and down. The buckle 2 is driven by the airtight door 6 to move left and right relative to the positioning block 1 on the flange 3 of the box body. To the left is to fasten the two explosion-proof surfaces ...
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The invention discloses a buckle structure of an explosive proof box door frame for a mine. Each group of the buckle structure comprises positioning pieces and buckles. The positioning pieces are arranged on a box body flange. The buckles are arranged on a sealing door flange. The buckle structure of the explosive proof box door frame for the mine is characterized in that each positioning piece is provided with an inclined plane. A buckling inclined plane matched with the inclined plane of the positioning piece is arranged inside a bulging portion at the upper end of the buckles. An angle of inclination between the inclined plane of the positioning pieces and the inclined plane of the buckle is from 5 degrees to 8 degrees. The buckle structures are symmetrically arranged on the box body flange and the sealing door flange. The buckle structure of the explosive proof box door frame for the mine is simple in structure, low in requirements of processing precision and easy to assemble. The two sloped typed inclined planes shift coordinately after a door frame is closed and strained. In the shifting process, the buckles are under the action of force which is perpendicular to an anti-explosion surface, thus force on the buckles are changed to pretightening force of the anti-explosion surface, so gaps of the anti-explosion surface decrease and the problems that the gaps of the anti-explosion surface become large suddenly in the process of anti-explosion are prevented.
Description
technical field [0001] The invention relates to the field of coal mine explosion protection, in particular to a buckle structure on the door frame of an explosion-proof box for mine use. Background technique [0002] Due to the special requirements of coal mining, mine electrical equipment must take explosion-proof isolation measures. In the explosion-proof field of coal mines, the common buckle structure of the door frame of the explosion-proof box has the positioning block and the buckle fitting surface parallel to the flange surface of the sealed door without inclination. Such a structure requires a high degree of fit between the insert and the buckle. It is easy to cause the two explosion-proof surfaces to be not fastened enough. When sparks are generated in the explosion-proof box, it is easy to cause accidents at the junction between the sparks and the external air. Compared with some explosion-proof boxes with no buckle structure on the door frame, since there is no ...
Claims
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IPC IPC(8): H02B1/26
Inventor 徐晋勇卢德明唐焱张应红蒋占四张斌高鹏陈金龙高成吴明
Owner 明创慧远(长沙)矿山设计研究院有限公司