Axially split pump

Abstract

The invention provides an axially split pump which comprises a pump body, wherein the pump body comprises an impeller, a pump shell and a refluxing structure, wherein the pump shell comprises a suction passage, an accommodating space and an exhaust passage which are arranged in sequence; the impeller is arranged in the accommodating space; the suction passage is vertical to the axis of the axially split surface of the axially split pump and extends from the bottom surface of the pump shell along a direction away from the pump shell; the exhaust passage is arranged at a first side surface of the pump shell and extends from the first side surface along a direction away from the first side surface; the refluxing structure is used for communicating the bottom of the exhaust passage with the suction passage. The axially split pump is capable of better avoiding the static erosion problem of the pump shell and the impeller after termination of pumping; in addition, liquid in the accommodating space completely flows out after halt, so that the anti-freezing effect is relatively ideal.

Description

technical field [0001] The present invention relates to the field of pumping machinery, more specifically, to a split pump. Background technique [0002] In the prior art, split pumps are widely used in various enterprises such as environmental protection, fire protection, petroleum, chemical industry, power station, metallurgy, and urban water supply and drainage. However, the general split pump - the horizontal split single-stage double-suction pump does not have the self-priming function, and the pump can only be started by using the bottom valve to inject water or using a vacuum pump to divert water. Because the bottom valve is easy to leak, the reliability is poor, the displacement of the vacuum pump is small, the start-up time is long, and insulation measures are required in winter. When the pool is deep, the suction lift of the general double-suction pump cannot meet the requirements, and a low-level pump room must be dug or a high-level pump room must be built. Pool...

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventor found that although the single-stage and multi-stage double-suction turbine synchronous suction pumps mentioned above can basically achieve water discharge when the pump is turned on, and empty when the pump is stopped However, the liquid that has entered the housing space of the impeller of the pump casing after shutdown cannot be completely removed, so a certain amount of liquid will inevitably remain in the storage space, and the problem of static erosion of the pump casing and impeller after the pump is stopped not completely resolved

Moreover, since there is still liquid in the accommodation space after the pump is stopped, the effect of antifreezing is not very ideal.

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