Frost crack prevention water pump

Abstract

The invention relates to water pump equipment, in particular to a frost crack prevention water pump which aims to solve the problem that the traditional anti-freezing water pump cannot fundamentally prevent frost cracks, while some people propose that the inner wall of a water meter or a pipeline is provided with an expansion layer, though the frost cracks can be prevented, freeze is difficult to thaw from outside after icing. The frost crack prevention water pump comprises a pump case, an impeller and a flow guide pipe, wherein the impeller is externally provided with a water outlet cover with an axle center hole, and the water outlet cover divides the internal space of the pump case into an impeller chamber and a front chamber which are mutually communicated; the flow guide pipe is arranged in the front chamber, and one end of the flow guide pipe is connected with a water inlet pipe extending into the pump case, while the other end is connected with the axle center hole of the water outlet cover; the flow guide pipe is externally sleeved with an elastic expansion piece; and the elastic expansion piece is large at both ends and small in the middle, provided with an axle center hole and made of a non-hygroscopic elastic material. The frost crack prevention water pump has the advantages of simple structure, frost crack prevention and easier thawing and is widely suitable for various cold environments.

Description

technical field [0001] The invention relates to a water pump device, in particular to an anti-freezing and cracking water pump. Background technique [0002] The Chinese utility model patent published on May 12, 2010 with the publication number CN 201461453U discloses a kind of "antifreeze water pump". , can not fundamentally prevent freezing and cracking, and if it is not used outdoors for a long time in winter, the water stored inside will still freeze, and it is difficult to heat and melt from the outside after freezing. [0003] On November 21, 2007, the publication number is CN200979077Y, which discloses an antifreeze cracking device for pipe fittings, containers and water meters. , the telescopic layer shrinks under pressure, thereby avoiding cracking. [0004] However, the expansion layer adopts materials with poor thermal conductivity such as rubber and foam plastic. After adding the expansion layer, although the equipment will not freeze and crack, once it freezes...

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Problems solved by technology

[0002] published on May 12, 2010, the publication number is CN 201461453U Chinese utility model patent discloses a kind of " antifreeze water pump ", and this antifreeze water pump is to pump body from The outside is completely sealed. This method can only delay the freezing of the pump inside, but cannot fundamentally prevent freezing and cracking. If it is not used outdoors for a long time in winter, the internal water will still freeze, and it is difficult to heat and melt from the outside after freezing.

[0004] However, the expansion layer is made of materials with poor thermal conductivity such as rubber and foam plastic. After adding the expansion layer, although the equipment will not freeze and crack, once it freezes, it is difficult to remove it from the outside. Heating and melting ice is difficult to defrost and cannot be practically applied

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