Double-acting four-inlet four-outlet reciprocating pump

Abstract

The invention discloses a double-acting four-inlet four-outlet reciprocating pump. The reciprocating pump comprises a hydraulic cylinder body, main pump barrels, a feeding pipeline and a discharging pipeline, the main pump barrels are coaxially and symmetrically arranged on two sides of the hydraulic cylinder body, and inner auxiliary pump barrels are arranged between the main pump barrels and thehydraulic cylinder body. One end face of each inner auxiliary pump barrel communicates with a port of the corresponding main pump barrel, and the other end face of each inner auxiliary pump barrel isfixed to the end face of the hydraulic cylinder body. A hydraulic driving rod is arranged in the hydraulic cylinder body, the two ends of the hydraulic driving rod are inserted into the main pump barrels and fixedly provided with pistons, and oil openings are formed in the circumferential surface of the hydraulic cylinder body. An inner feeding opening and an inner discharging opening are formedin the annular surface of each inner auxiliary pump barrel, wherein any angle is formed between the inner feeding opening and the inner discharging opening, and the inner feeding opening and the innerdischarging opening communicate with the feeding pipeline and the discharging pipeline through one-way valves. Ports, away from the inner auxiliary pump barrels, of the main pump barrels communicatewith the feeding pipeline and the discharging pipeline through one-way valves. The reciprocating pump is simple in structure, small in occupied area, low in manufacturing, maintenance and site cost and small in fluid resistance, the output flow under the same power is remarkably increased, and the power can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of raw material conveying pumps, in particular to a double-action, four-in, four-out reciprocating pump. Background technique [0002] At present, in the process of sludge treatment, the plunger pump is commonly used as the feed pump for the sludge dewatering machine. The plunger pump can pump the medium with high viscosity and poor fluidity, without shearing, agitation, and turbulent flow. The pumping is stable, and it is widely used in the feed pump of the sludge dewatering machine. The existing plunger pump is a double-cylinder single-feed mode, the piston rod is always reciprocating, and the reactive chamber of the working cylinder does not feed and discharge materials, which is prone to high temperatures and causes waste of power, especially in high-power applications , double-cylinder single-feed cannot meet the requirements of working conditions. [0003] The application number is "CN201811167626.6"...

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Problems solved by technology

[0005] The main problems in the above two methods are: 1. The first method can not be realized by welding the pipeline on the outer ring surface of the end of the working cylinder, because the welding of the inner ring surface of the working cylinder cannot ensure the smooth weld seam of the inner wall and cannot meet the needs of the working cylinder. The pressure and temperature resistance performance requirements of the cylinder cannot meet the normal reciprocating movement requirements of the piston inside the working cylinder;

[0006] 2. In the second method, the diameter of the two small holes on the end face of the working cylinder is smaller than the end face of the working cylinder. Generally, the diameter of the small holes is 50, while the diameter of the end face of the working cylinder is 100. The actual channel cross-sectional area of ​​the two small holes is only the cross-sectional area of ​​the working cylinder. Half, there is a throttling phenomenon during actual operation, the piston is affected by the increase in resistance and the propulsion speed is slow, which reduces the displacement per unit time and also increases the pressure of the hydraulic system

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