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106 results about "Front airbag" patented technology

Coal mine gas pre-extracting drilling flexible hole sealing system and method

The invention discloses a coal mine gas pre-extracting drilling flexible hole sealing system and method. The system comprises a hole sealing mechanism, a gas extracting mechanism and a grouting mechanism. The hole sealing mechanism comprises an extracting pipe, a grouting pipe and two pressurizing pipes, all of which are arranged side by side. One end of gas extraction serves as the inner end of agas pre-extracting drilling space, and the other end of gas extraction serves as the outer end of the gas pre-extracting drilling space. A front airbag, a middle airbag and a rear airbag are sequentially arranged in the gas pre-extracting drilling space from outside to inside. The middle airbag is composed of an upper airbag and a lower airbag which are symmetrically arranged up and down. An extracting pipe penetrates through the front airbag and the rear airbag and is clamped between the upper airbag and the lower airbag, one of the two pressurizing pipes sequentially penetrates through thefront airbag and the upper airbag from outside to inside into the rear airbag, and the other of the two pressurizing pipes sequentially penetrates through the front airbag and the lower airbag from outside to inside into the rear airbag. The grouting pipe penetrates through the front airbag and is clamped between the upper airbag and the lower airbag. The method includes the steps of drilling, hole washing, grouting hole sealing and gas extracting. The hole sealing effect can be effectively improved.
Owner:XIAN UNIV OF SCI & TECH

Flexible grinding and polishing compound arc sand wheel

InactiveCN102794716AExpand the effective part of processingGood removal effectBonded abrasive wheelsEngineeringGrinding wheel
The invention discloses a flexible grinding and polishing compound arc sand wheel and relates to a sand wheel. The flexible grinding and polishing compound arc sand wheel comprises a sand wheel body, an air valve, an airbag arc-shaped adjustment device, an annular airbag, a grinding and polishing material ring and a compaction device, wherein an air channel is formed in the sand wheel body; the air valve is arranged in the air channel; the inner end of the air channel is communicated with an inner cavity in the annular airbag; the air channel is externally connected with an air source through the air valve; the airbag arc-shaped adjustment device is provided with a front airbag arc-shaped adjustment ring, a rear airbag arc-shaped adjustment ring and an adjustment drive screw rod; the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring are respectively nested onto the rear end surface of the sand wheel body; the adjustment drive screw rod penetrates through the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring as well as the sand wheel body and is in running fit with the sand wheel body; the front part and the rear part of the adjustment drive screw rod are in threaded fit with the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring respectively; the annular airbag is sleeved and pressed onto the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring; the grinding and polishing material ring is sleeved onto the annular airbag; a front pressure ring and a rear pressure ring of the compaction device are used for compacting the two end surfaces of the grinding and polishing material ring and the two end surfaces of the annular airbag respectively; and the front pressure ring and the rear pressure ring are fixedly connected with the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring respectively.
Owner:XIAMEN UNIV

Automobile active safety multi-layer and multi-set outer anti-collision airbag device

The invention provides an automobile active safety multi-layer and multi-set outer anti-collision airbag device formed by assembling a multi-layer and multi-set front airbag, an extending airbag back, two side airbags, a rear airbag, a radar, a single-chip microcomputer, a signal connecting line, a gas distributor, gas conveying pipelines, multiple small gas bottles, airbag fixing devices and the like. The multi-layer and multi-set front airbag of an automobile is formed by connecting multiple independent airbag bodies. The front airbag is shaped like a barrel placed in an inverted mode from appearance. Each airbag body is made of macromolecule fiber shell fabric and a net. The size of the nets is smaller than that of the airbag bodies. The airbag bodies are shrunk in a vacuum mode. When the automobile travels at a high speed and is within a critical distance, the radar is started, the single-chip microcomputer transmits signals, the gas distributor is opened, gas in the small gas bottles enters airbag pipelines of independent outer, middle and inner layers of the gas distributor through pipelines, and is conveyed to the multiple layers of independent airbag bodies at the other end of the gas distributor, and the airbag body of the outmost layer of the multi-layer and multi-set front airbag and the extending airbag back are integrated; the airbag back is inflated to extend to a front windshield. The two side airbags and the rear airbag of the automobile are made of single-layer airbag bodies and nets. A control system is just like the front airbag.
Owner:WORLD TIANJIN BIOTECH CO LTD
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