2results about How to "Smaller specific heat" patented technology

The utility model relates to cable technical field discloses a wear -resisting waterproof type power cable, including cable core and shielding layer, the number of cable core is three, the inside of shielding layer is located to cable core, the outer surface of cable core is fixedly connected with insulating layer, the inner chamber of shielding layer and be located between adjacent cable core and be provided with rebound rubber pipe, the utility model discloses a cable core, shielding layer and insulating layer can improve the insulation shielding performance of cable, through setting up rebound rubber pipe, can when the cable is extruded, to its buffer protection, avoid causing cable damage, through setting up waterproof layer, can improve the waterproof performance of cable, through setting up function layer, can improve the heat -proof flame -retardant performance of cable, through setting up wear -resisting layer, can improve the wear resistance of cable, through setting up above structure, can improve the wear -resisting waterproof ability and pressure -resistance of cable, to be able to satisfy the special use demand of user.

The utility model relates to the technical field of water meters, in particular to an anti-freezing water meter sleeve. According to the technical scheme, the water meter sleeve comprises a sleeve body wrapped outside a water meter, the sleeve body is divided into a fiber layer and a fluff layer from top to bottom, a cavity is formed between the fiber layer and the fluff layer, and the sleeve body further comprises an air bag arranged in the cavity. According to the utility model, the air bag is arranged in the heat insulation sleeve, and the heat insulation performance of the gas is more obvious and the heat insulation effect is achieved by utilizing the reason that the heat conduction is difficult to form due to larger intermolecular distance and more violent molecular movement of the gas and the gas has the characteristics of low specific heat, low density, low heat conductivity and the like; therefore, the water meter sleeve is good in heat preservation and anti-freezing effect, low in production cost and convenient to popularize.