Reciprocating type hydraulic diaphragm pump without three-way valve device

Abstract

The invention relates to a reciprocating type hydraulic diaphragm pump without a three-way valve device, which comprises a hydraulic cylinder and pistons, wherein the front end of the hydraulic cylinder is provided with a medium chamber, the back end of the hydraulic cylinder is provided with a power device, and the pistons are linked with the power device through a piston rod; the pistons comprise a diaphragm piston and a drive piston, the diaphragm piston is connected with the drive piston through a connecting rod, and the outer diameter of the diaphragm piston is the same to that of the drive piston; the diaphragm piston comprises a piston body and a diaphragm, the piston body is provided with a through hole for permitting a hydraulic medium to pass through, the front surface of the diaphragm is in contact with a transmission medium, and the back surface is in contact with the hydraulic medium; a corrugated pipe for permitting the hydraulic medium to penetrate through and blocking particles to penetrate through is arranged between the diaphragm piston and the drive piston, the front end of the corrugated pipe is fixedly connected with the connecting rod through a front flange, and the back end is fixedly connected with the hydraulic cylinder through a back flange; and the corrugated pipe divides the hydraulic cylinder into a front sub chamber and a back sub chamber, the diaphragm piston is located in the front sub chamber, and the drive piston is located in the back sub chamber. The invention has the advantages of simple structure, no debugging and long service life.

Description

technical field [0001] The invention relates to a reciprocating hydraulic diaphragm pump. technical background [0002] Diaphragm pumps are widely used and can be used to transport many kinds of fluids with different properties, such as high temperature, high pressure, high concentration, high density, large particles, easy to precipitate, strong abrasiveness, strong corrosive medium. Industrially used in petroleum exploration, petrochemical, coal chemical, non-ferrous metallurgy, electric power and other industries to transport chemical media, mud, ore slurry, coal water slurry, furnace slag slurry, sewage, etc. One of its notable features is that the conveying medium and the working medium are separated by a diaphragm, which can theoretically achieve zero leakage. [0003] In traditional reciprocating hydraulic diaphragm pumps, flat diaphragms are mostly used, and the structure of the diaphragm cavity is as follows: figure 1 shown. The reciprocating motion of the plunge...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of existing diaphragm pumps that need to design a three-valve device in the inner cavity of the hydraulic cylinder, the structure is complex, the debugging requirements are high, and the service life is short, the present invention proposes a three-valve device with a simple structure, no need for debugging, and a long service life. Reciprocating hydraulic diaphragm pump with valve unit

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