Straight-through type synchronous suction and exhaust device for pump

Abstract

The invention discloses a straight-through type synchronous suction and exhaust device for a pump. The straight-through type synchronous suction and exhaust device comprises a casing, wherein a liquid outlet pipe is arranged on the lateral side of the casing, and a connection flange capable of being connected with an inlet of the pump is arranged at the end of the liquid outlet pipe. The straight-through type synchronous suction and exhaust device is characterized in that the bottom end of the casing is connected with a foundation plate through an installation flange, a lower liquid suction pipe with a bottom end located below the liquid level is arranged in the foundation plate at the lower end of the installation flange, an inner liquid suction pipe communicated with the top end of the lower liquid suction pipe is arranged in the casing, and the height of the top end of the inner liquid suction pipe is between that of the liquid outlet pipe and that of the top end of the casing. A check valve which can be opened only outwards is further arranged at the top end of the inner liquid suction pipe, and an upper cover flange is arranged at the top end position of the casing and connected with a flange cover. The straight-through type synchronous suction and exhaust device is simple in structure and ingenious in design, can substitute a conventional straight-through type synchronous suction and exhaust device for a submerged pump after being matched with a self-sucking pump in use, and has the advantages of being safe, reliable, compact in structure, convenient to overhaul and the like.

Description

technical field [0001] The invention relates to a pump auxiliary device, in particular to a straight-through synchronous suction and exhaust device for a pump. Background technique [0002] A submerged pump is a pump whose working part is submerged below the liquid surface. Its structural feature is that the pump body is longer, and the support of the submerged part is a guide bearing. However, in the actual working process, the guide bearing is very easy to wear and needs to be overhauled frequently, and the workload is relatively large; once the overhaul is not timely, it is easy to cause failures such as car holding, upper seal failure, and bearing damage. Some faults have great potential safety hazards in flammable and explosive places. At present, PetroChina, Sinopec and other enterprises have stipulated that the use of submerged pumps is prohibited in explosion-hazardous areas. As a special-purpose centrifugal pump, self-priming pumps are often used in chemical proc...

AI Technical Summary

Problems solved by technology

As a special-purpose centrifugal pump, self-priming pumps are often used in chemical processes, industrial and mining sewage treatment, farmland irrigation and other fields, but traditional self-priming pumps are large in size, and the vibration and noise during operation are also Larger so cannot directly replace sump pumps

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