114results about How to "Fast expansion" patented technology

A gas dispenser is technically characterized in that a PLC firstly collects the pressure value of a pressure sensor in a gas dispersion gun, namely the pressure value in a vehicular gas cylinder. Then the pressure value is added with a preset value, wherein 0<the preset value <20. The summation is compared with the pressure value of each pressure sensor under a plurality of gas cylinder openings. The valve corresponding with the pressure value which is most approximative to and larger than the summation is opened for dispensing the gas through pressure difference. The steps are adopted again before balancing or after balancing. The steps are repeated until the value of the pressure sensor in the gas dispersion gun is the rated pressure value of the vehicular gas cylinder, wherein the rated pressure value is smaller than or equal to 20MPa. Then the valve is closed and the gas dispensation is finished. The gas station of the invention is composed of a plurality of gas cylinders and gas dispensers. The gas station is technically characterized in that the plurality of gas cylinders are used circularly for providing the high-pressure gas for satisfying the using amount of continuous gas dispensation of a single gun or a plurality of guns to the vehicular gas cylinder. The invention changes the technical route of prior gas substation. The matching of large-scale power devices of compressor and hydraulic pump is not required. The gas dispenser has no mechanical wear and extraordinarily low current consumption. The gas dispenser of the invention is the developing direction of the future.

The invention aims to provide a method for pre-expanding a cold-shrinking cable accessory, which comprises the following steps: expanding the cold-shrinking cable accessory by using a steel wire tensioned between two corresponding expansion discs; sleeving a support tube on an expansion bar of which one end is provided with an expansion cone head, and sleeving an end cap at the other end of the expansion bar; pushing the end cap through a cylinder piston so as to forward push the expansion bar and the support tube together along the axial direction of the cable accessory till the expansion cone head of the expansion bar is fully pushed out of the other end of the cable accessory; and finally, removing the end cap, the expansion bar and the steel wire in turn, and shrinking and clasping the cable accessory outside the support tube so as to finish pre-expanding. The cable accessory is expanded by adopting the steel wire, the steel wire material is easily obtained and does not need to bepolished, the steel wire is cheaper than a steel bar, and the steel wire for expanding the cable accessory can be pulled out by using mechanical operation, so the labor intensity of operators is lightened, the expanding speed is high and the work efficiency is improved; and the surface of the steel wire has good degree of finish, so the steel wire has little damage to the inner wall of the cold-shrinking cable accessory, ensures the safety of the cable accessory and improves the quality of a product.

The invention discloses a method for plugging formation leakage and improving bearing capability of a formation based on the capsule-type expansion body heated at ground temperature. The capsule-typeexpansion body consists of a capsule-type expansion body shell and a liquid or solid temperature control expansion material, enters a well circumference and formation cracks and holes far away from the body with drilling fluid circulation, is heated to a certain temperature range with the ground temperature, then quickly and remarkably expands, elastically deforms to self-adapt to plugging of various types of leaked formations and improve the bearing capability of the formations. The capsule-type expansion body is divided into a physical gasification type or chemical decomposition reaction type according to the expansion principle of the liquid or solid temperature control expansion material, is kept in a non-expanding state during relatively low-temperature ground transportation and in-shaft circulating flow, and has the advantages of quick and effective plugging, self adaptation, long distance, dismounting and the like when producing quick and remarkable volume expansion and pluggingformation leakage at physical and chemical reaction temperatures.