92results about How to "Achieve the purpose of repeated use" patented technology

The invention discloses a domestic water filtering and purifying structure, which comprises a hollow cylindrical filtering shell and at least one filtering unit, wherein the at least one filtering unit is arranged at the inner side of the filtering shell and is further arranged in a superposition manner along the vertical direction; the top of the filtering shell is provided with a water inlet; the bottom of the filtering shell is provided with a water outlet; each filtering unit comprises a filtering upper cover and a filtering base respectively; each filtering upper cover is provided with an umbelliform upper filtering surface; each upper filtering surface is provided with a filtering material which is used for adsorbing and filtering out impurities in water; the outer side edge of the circumference of the filtering upper cover is provided with a water outlet hole; each filtering base is arranged below the corresponding filtering upper cover and is further provided with an inverted umbelliform lower filtering surface; each lower filtering surface is provided with a filtering material which is used for adsorbing and filtering out the impurities in the water; the middle part of each filtering base is provided with a water outlet. By adopting the technical scheme, according to the domestic water filtering and purifying structure, the increment of water filtering time is realized through the oblique filtering surfaces provided with the filtering materials; the domestic water filtering and purifying structure is excellent in filtering effect; further, a filtering structure can be repeatedly used after being cleaned.

The invention relates to the technical field of safety pressure relief, in particular to a pressure relief method of a pressure relief device of a switch cabinet. The safety type pressure relief device of the switch cabinet comprises a cabinet body, a backflow device and a pressure relief device arranged in the cabinet body, the cabinet body comprises a cavity, side pressure relief cavities are formed in the left side and the right side of the cavity, a bottom pressure relief cavity is formed in the position between the bottoms of the two side pressure relief cavities, and a plurality of fixed pressure relief holes are formed between the side pressure relief cavities and the cavity in a rectangular arrangement mode. A sliding groove is formed between the bottom pressure relief cavity and the side pressure relief cavity, a plurality of pressure relief grooves are formed in the side, close to the side pressure relief cavity, of the top of the bottom pressure relief cavity, a front side hole is formed in the front side of the bottom pressure relief cavity, and a rear side hole is formed in the rear side of the front side hole. Through the arranged sealing spring, the sealing plug is reset under the elastic force action of the sealing spring, so that the sealing plug can continue to work during next pressure relief, the purpose of repeated use is achieved, resource waste is reduced, and the pressure relief cost is saved.