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

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 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.