An external diaphragm type strong self-priming device

Abstract

The invention discloses an external diaphragm type strong self-suction device. A rack is of a three-layer steel frame structure; a bearing box is arranged on the upper layer of the rack, shaft holes are formed in the centers of the left and right sides of the bearing box respectively, and a transmission shaft is installed on the shaft holes; a motor is arranged in the front of the middle layer of the rack, and a water storage tank is arranged at the back of the middle layer of the rack; the center of the transmission shaft and the center of a motor output shaft are located in the same center line; a lower cover is arranged at the top of the bearing box, an upper cover is arranged above the lower cover, a diaphragm A is arranged between the lower cover and the upper cover, and a pipe opening in the top of the upper cover is connected with a solenoid valve A and a connecting hose B through a tee joint; the connecting hose B is communicated with the water storage tank through a solenoid valve B and a connecting hose C in sequence. The external diaphragm type strong self-suction device is extremely high in self-suction capacity and self-suction speed, reliable in sealing performance, short in working time, capable of being used in cooperation with all common horizontal centrifugal pumps and convenient and easy to install, the service life of the device is prolonged, self-suction can be achieved without pump priming, and no anti-freezing measure is needed.

Description

technical field [0001] The invention belongs to the technical field of centrifugal pumps, and in particular relates to an external diaphragm type strong self-priming device, which can be used in conjunction with conventional centrifugal pumps, and can suck up the conveying medium from a liquid storage pool without pump filling And transported out, its maximum self-priming height can reach 8 meters, widely used in oil fields, petrochemical, refining, metallurgy, mining, power plants, sewage treatment and other fields, it can self-prime and transport clean or slightly polluted products without irrigation It is the best ideal conveying equipment with strong self-priming performance for chemically neutral or corrosive liquids. Background technique [0002] At present, centrifugal pumps generally used in oil fields, petrochemical, refining, metallurgy, mining, power plants, sewage treatment and other fields: some pumps in horizontal pumps do not have self-priming function or self...

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Problems solved by technology

[0002] At present, centrifugal pumps generally used in oil fields, petrochemical, refining, metallurgy, mining, power plants, sewage treatment and other fields: some pumps in horizontal pumps do not have self-priming function or self-priming performance is small and cannot meet the requirements of on-site use. Vertical submerged pumps are troublesome to install, maintain and overhaul, and the operation stability and reliability of pumps with deep submerged depths cannot be guaranteed, seriously affecting personal safety and even causing unimaginable other serious consequences

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