6results about How to "Efficient sealing" patented technology

The utility model discloses a PCCP (prestressed concrete cylinder pipe) connecting structure which comprises pipe bodies, the two ends of each pipe body are respectively provided with an inserting part and a socket part, the inserting parts and the socket parts on the two pipe bodies which correspond to each other end to end are inserted and correspond to each other, sealing rings are arranged on the outer sides of the inserting parts, and sealing rings are arranged on the outer sides of the socket parts. Fixing parts and pressing parts corresponding to the fixing parts are arranged at the two ends of each pipe body respectively, the number of the pressing parts is multiple, and the pressing parts are detachably connected with the fixing parts on the adjacent pipe bodies. The pipeline connecting structure has the beneficial effects that the fixing pieces and the pressing pieces at the two ends of the pipe body are combined, the multiple pressing pieces enable two sections of pipelines to be stably connected in a detachable connection mode, pressure can be gradually applied in the later use process, and the tightness and long-term sealing of pipeline connection are guaranteed.

The utility model discloses a liquid metal packaging structure, which comprises a sealing frame and a heat dissipation piece, the sealing frame comprises a frame, a first elastic sealing ring and a second elastic sealing ring, the middle area of the frame is provided with an accommodating area, a chip is arranged in the accommodating area, an annular groove is formed between the chip and the frame, the first elastic sealing ring is embedded in the bottom of the annular groove, and the second elastic sealing ring is embedded in the bottom of the annular groove. The second elastic sealing ring is arranged on the periphery of the frame in a surrounding mode, the heat dissipation piece is arranged on the end face of the frame in a covering mode, the heat dissipation piece, the chip, the first elastic sealing ring and the frame jointly define a sealed space used for being filled with liquid metal, and the frame comprises a plurality of holes and has compressibility. The liquid metal packaging structure provided by the utility model realizes efficient heat conduction and can reliably seal the liquid metal under pressurization.

A hydropower station underground gate shaft maintenance stair channel closing facility comprises channel steel, expansion bolts, double-nut bolts and a steel plate. The length of the channel steel is smaller than that of the long side of an orifice, and a phi 25mm hole is drilled in a web of the channel steel and fixed on the side wall through a first expansion bolt; phi-18mm holes are uniformly drilled in channel steel wing plates and staggered with web plate holes, and double-cap bolts penetrate through the wing plate holes and then are welded and fixed. Holes with the diameter phi being 16 mm are drilled in the side beams, second expansion bolts are embedded in the holes, and the holes in the two sides of the hyacinth-bean-shaped riffled plate correspond to the side beams and channel steel wing plate hole positions and are provided with lifting ring installation holes and rectangular lifting rings. And one side of the steel plate is connected with the side beam through a second expansion bolt, and the other side is connected with the channel steel through a double-nut bolt to fill the orifice to realize closing. According to the facility, efficient sealing is achieved through common materials, rapid dismounting and repeated mounting can be achieved, universality is high, safety is high, and the facility is suitable for the flexible sealing requirement of the hydropower station underground gate shaft overhaul channel.

The utility model provides a dynamic sealing device combining magnetofluid sealing and spring compensation, and relates to the technical field of magnetofluid sealing. According to the utility model, when the moving shaft rotates, the magnetofluid is fixed in the magnetofluid groove by the magnetofluid sealing assembly through a magnetic field generated by the magnet, so that a stable sealing layer is formed, medium leakage is prevented, and meanwhile, the sealing effect is further enhanced by the sealing screen; the spring compensation assembly pushes the connecting block and the first sealing ring to slide along the first limiting groove through the elastic force of the telescopic spring, so that the sealing ring is in close contact with the movable shaft all the time, gap changes caused by abrasion or vibration are automatically compensated, the supporting block and the connecting block are matched through the second limiting groove, and stable movement of the sealing ring is ensured; the whole device realizes efficient sealing and automatic adjustment under a dynamic working condition, and is suitable for high-speed rotating machinery and precision equipment.

The utility model discloses a heat -proof door window structure, including first vertical section bar, second vertical section bar, third vertical section bar, fourth vertical section bar, fifth vertical section bar and sixth vertical section bar from left to right are sequentially arranged, the first vertical section bar top and fifth vertical section bar top are connected with the first horizontal section bar, the fifth vertical section bar top and sixth vertical section bar top are connected with the tenth horizontal section bar, the first vertical section bar middle part and fifth vertical section bar middle part are connected with the second horizontal section bar, the first vertical section bar bottom and fifth vertical section bar bottom are equipped with the third horizontal section bar, between second vertical section bar, first horizontal section bar, fourth vertical section bar and second horizontal section bar are equipped with two first window that set up oppositely. The heat -proof door window structure of the utility model passes through the reasonable layout of multiple vertical section bars and horizontal section bars, and the ingenious design of heat -proof part and sealing strip is combined, realizes efficient heat -proof and sealing performance.

This invention belongs to the technical field of coal mine gas control equipment, specifically relating to a gas drainage device for coal mine gas control. The device includes a base, a suction pump, a filter box, and a gas collection box, all mounted on the base. The suction pump is equipped with a first drive motor, the output of which is connected to the pump. The pump's inlet is connected to the filter box, and its outlet is connected to the gas collection box. The filter box is connected to an inlet pipe, which is connected to a gas drainage pipe via a locking mechanism. The filter box filters impurities carried during gas drainage. A filter plate with multiple filter holes is installed inside the filter box, and a filter screen with a cleaning component is provided on the surface of the filter plate. This device solves the problem that the connection between the gas drainage pipe and the inlet pipe in coal mine gas drainage devices is easily loosened by external forces, leading to gas leakage and reduced drainage efficiency.