57results about How to "Solve explosion-proof" patented technology

A coal mine information device press key comprises the following components: an emergent ray axis (311) on the light transmitting device (31) and a receiving ray axis (314) on the light receiving device (32); a lens part (20) which is taken as one part of the explosion-proof casing and is arranged on the upper part of the light transmitting device (31) and the light receiving device (32); and a key cap body (15) which has unique structure and is arranged at the upper side of the lens part (20), and when the key cap body (15) is at the first position, the light transmitting part (11) leads to the transmitting light to the outside of the receiving ray axis (314). The key cap body (15) at the second position when it is pressed the transmitting ray transmits into the light receiving device (32) along the receiving light axis (314) and the light receiving device (32) is accessed into the press key circuit thereby realizing the function of the press key. The structure of the press key of the invention can satisfy the requirement for preventing explosion in the electric device used in the explosive gas atmosphere.

The invention relates to a crawler belt walking wet type concrete sprayer comprising a frame, a crawler belt walking mechanism, a stirring and overturning mechanism, a spraying mechanism and a hydraulic system. The crawler belt walking mechanism is arranged at the both sides of the frame; a hydraulic pump of the hydraulic system drives a walking motor of the crawler belt walking mechanism through a hydraulic oil path; the walking motor drives a driving wheel to rotate through a speed reducer, so that the machine walks; the hydraulic system and the spraying mechanism are respectively arranged at the both ends of the frame; the stirring and overturning mechanism is arranged on the frame between the hydraulic system and a conveying mechanism; the stirring and overturning mechanism forcibly stirs a concrete material, and overturns a stirring tank, so that the concrete material inside the stirring tank is poured into a material tank of a concrete pump; and the material is conveyed through the concrete pump; and compressed air is added at the position of a spraying opening in a mixing manner, so that the concrete is sprayed. The wet type concrete sprayer provided by the invention integrates the functions of walking, stirring, conveying and spraying into a whole; the rebound ratio is less than 5%; the wet type concrete sprayer has the advantages of no dust, safe, reliable and high-efficiency use and humanization. The wet type concrete sprayer uses full-hydraulic control and has the advantages of stable conveying and simple operation, so that the underground anti-explosion problem can be effectively solved.

The invention discloses a snake arm refueling robot device and system. The snake arm refueling robot device includes a refueling island, a control driver, a refueling vision device, a snake robot arm,an integrated oil gun and a refueling cover opening and closing device, wherein the refueling island comprises a first embedded cavity; the control driver is installed in the first embedded cavity; the refueling vision device and the snake robot arm are separately arranged at the upper portion of the refueling island; the integrated oil gun and the refueling cover opening and closing device are separately installed at the tail end of the snake robot arm; and the refueling vision device, the snake robot arm, the integrated oil gun and the refueling cover opening and closing device are separately electrically connected with the control driver. The device can achieve automatic refueling and improve the refueling speed, and can meet the requirements of explosion-proof and IP protection level,so that the customer experience is improved well.

The invention relates to the field of biological pharmacy, in particular to a pichia pastoris fermenting method for improving precursor expression of insulin and analogue thereof. The fermenting culture comprises the following stages of an initial growth phase, a glycerin supplementing phase and a methanol inducing phase. The method has the advantages that by controlling a formula of an initial culture medium, and the nitrogen source type and carbon source supplementing type, and continuously or semi-continuously supplementing a small amount of microorganisms or plant-source organic nitrogen sources in the middle and later period of fermenting, the fermenting cycle is extended; while the quality of the target product is guaranteed, the output is increased by not less than 30%.

The invention relates to a mining voltage type high-voltage explosion-proof frequency converter. The mining voltage type high-voltage explosion-proof frequency converter comprises a shell, wherein a plurality of reinforcing ribs are arranged on the outer wall and the inner wall of the shell; a plurality of clapboards are arranged in the shell, and partition the internal space of the space into a primary circuit chamber, a secondary circuit chamber and a water-cooling system chamber. The mining voltage type high-voltage explosion-proof frequency converter further comprises a water-cooling device, wherein the water-cooling device comprises an internal portion and an external portion; the internal portion is arranged in the water-cooling system chamber; the external portion is arranged outside the shell; the internal portion comprises an explosive-proof valve, a water distribution pipe and a water return pipe; the external portion comprises a radiator, an deionization exchanger and a pump unit. The mining voltage type high-voltage explosion-proof frequency converter has the beneficial effects that the explosion prevention problem during application of a voltage type high-voltage frequency converter under a coal mine is solved, and the problem of heat dissipation of a unit type structure is solved successfully. Through a water-cooled matched cabinet which is consistent with an explosion-proof standard, a plurality of water-cooling systems can be used at the same time, and a quick response can be made to failure of a cooling portion.

The invention provides a composite material for fitness yoga balls and a preparation method thereof. The composite material for the fitness yoga balls is prepared from the following components in parts by weight: 50 parts of pasty PVC resin powder, 15-30 parts of a thermoplastic polyurethane elastomer (TPU), 30-50 parts of a plasticizer, 1-3 parts of a stabilizer, 1-3 parts of a viscosity reducer,2-10 parts of a moderate and high temperature thermal expansion microballoon and 5-10 parts of pigment. According to the composite material for fitness yoga balls and the preparation method thereof,through a TPU and pasty PVC alloying technology, the hardness of a formula product can be reduced, and the elasticity of the yoga balls is improved. The expandable microballoon is added, the dosage ofthe pasty PVC resin powder can be obviously reduced, meanwhile, the dosage of the plasticizer is further obviously reduced, the thickness of a ball body can be kept invariable or increased, the ballbody surface of the prepared fitness yoga balls is fine and smooth, bumps with uniformly distribution are formed in the surface, as the fitness yoga balls have higher buffering performance, when the fitness yoga balls touch sharp objects accidently, the yoga balls are in a slow staleness process, potential safety hazards do not exist, and the problem of explosion proofing is solved.

The invention relates to an anti-explosion method for an electric welding machine, belongs to the field of electrical explosion prevention and applicable to electric welding on flammable and explosive occasions such as mines and chemical engineering places. According to the anti-explosion method for the electric welding machine, the electric welding machine, a contactor and other protection and control circuits capable of producing electric sparks easily are placed in a flameproof enclosure to form an explosive-proof welding source; in the welding process, electric arcs generated nearby a torch head are cooled by high-pressure nitrogen gas sprayed out of an internal spray nozzle of a welding gun, extremely hot molten iron sprayed nearby a weldment in the welding process is cooled by high-pressure water sprayed out of an external spray nozzle of the welding gun, the gas content nearby the welding gun is detected by a gas sensor, the flow of the high-pressure nitrogen gas and the flow of the high-pressure water are detected by a flow sensor, and a control cable is used for controlling connection and disconnection of a circuit of the explosive-proof welding source.

The invention relates to an anti-explosive method of an electric welder, which is suitable for welding large machinery equipment on working surfaces in coal mine underground excavation. The electric welder, a contactor and other electrical equipment are arranged in an explosion-isolation outer casing to isolate explosion, a high-pressure water pump and a water tank are arranged in an outer casingwithout explosion isolation, and a protection control circuit is arranged in the explosion-isolation outer casing. The protection control circuit comprises the gas locking protection of anti-explosive electric welding handle clippers, flow locking protection, water pressure locking protection and electric welder over-current protection. The ends of the anti-explosive electric welding holder clippers are provided with clamping mechanisms for clamping electrodes, and are also provided with a plurality of spray nozzles. During welding, a high-pressure water curtain is sprayed out of the spray nozzles, and the arc light generated by electric welding is sealed by the water curtain.

The invention relates to a pretreatment method for extracting plant effective components. Before extraction, wet basis plant materials are radiated by vacuum microwaves first, and then mechanical extrusion force and shearing force are repeatedly applied to plant materials after the radiation by vacuum microwaves by a screw extruder. After the pretreatment, the plant effective components of the plant materials are extracted subsequently according to a conventional method so that the extraction of the plant effective components has higher yield. The method also has the advantages of high microwave utilization rate, no damage to target effective components, short processing time and low energy consumption, can avoid an explosion accident of an organic solvent because the organic solvent is not used in the pretreatment of plants, and is suitable to be applied to industrial production.

The invention belongs to the field of mining hydraulic motors, particularly discloses a walking type hydraulic cylinder motor. The hydraulic cylinder motor with equal distributed angles is simple in structure, convenient to operate, high in safety coefficient, long in service life, is capable of effectively reducing the accident rate under a coal mine. The hydraulic cylinder motor comprises a box body, three hydraulic cylinders, a crank shaft, a box body front end component and a control system, wherein an installing plate fixed together with a tractor is arranged at one side of the box body; the hydraulic cylinders are arranged in the box body side by side; the hydraulic cylinders do reciprocating motion to drive the crankshaft to do rotating motion and the crankshaft drives the control system to move; the control system is used for controlling the three hydraulic cylinders to do reciprocating motion so as to drive the crankshaft to do continuous rotating motion; the hydraulic cylinders drives the crankshaft to rotate and can be used as left and right input devices of the tractor and a crane so as to drive the tractor and the crane to move simultaneously.

The invention discloses an underground passive beta emergency access indicating lamp, and relates to a passive indicating lamp which is designed to be fully sealed, safe, explosionproof and suitable for underground coal mine and non-coal mine emergency accesses. According to the technical scheme, the underground passive beta emergency access indicating lamp comprises a shell with an indicating pattern, and a luminophor, the luminophor is mounted in the shell, the passive luminophor is adopted by the indicating lamp, and comprises a tritium tube and a high-transparency epoxy resin body, and thetritium tube is poured and sealed in the high-transparency epoxy resin body. The surface of the high-transparency epoxy resin body is sequentially coated with a reflection layer and a protection layer, the indicating pattern is arranged on the front face of the high-transparency epoxy resin body, and the surface of the indicating pattern is not covered with a coating. The high-transparency epoxyresin body is provided with a frame for protecting the passive luminophor.