Large pump, strong backflow, small pump injection, small volume composite pump

Abstract

A combination pump with a large pump for powerful backflow and a small pump for small-amount outpouring includes a large-small pump which is of a piston structure and a control valve for controlling circulation of a large pump, a small pump and a combination pump. The large-small pump which is of a piston structure is that a small pump cavity body is arranged at the bottom end of an outlet in a cavity body of the large pump, a small piston extends out of the end face of a large piston in the cavity body of the large pump, the small pump is formed by a small piston and the cavity body of the small pump, and the combination pump is formed by the large pump and the small pump; and the control valve includes a valve body and a valve core, the valve body is internally provided with a valve corecavity body which can accommodate rotation of the valve core, and the valve core is placed in the valve core cavity body. According to the combination pump valve with the large pump for the powerfulbackflow and the small pump for the small-amount outpouring, powerful pressure of the combination pump during outpouring steps is adopted to dredge a large-amount outpouring channel and a small-amountoutpouring channel, during implementation of the steps, vacuum of the combination pump can be supplemented in time, and long-time await for vacuum supplementation in the combination pump can be avoided.

Description

technical field [0001] The invention relates to the technical field of paint toning, in particular to a large-pump, strong-reflux, small-pump, and small-volume composite pump. Background technique [0002] There are pump and valve structures already produced by our company, including large and small pumps with a plunger piston structure, valves for controlling the flow channels of large and small pumps, and a small pump cavity is installed at the bottom of the outlet of the large valve cavity, and extends inside the large pump cavity. A small piston is produced, and the small piston and the small pump cavity form a small pump, and the large pump and the small pump form a composite pump. The valve that controls the circulation of the large and small pumps includes such a flow structure. After the color paste pumped by the compound pump passes through the large amount of injection channel and the small amount of injection channel of the valve core, it is collected into the col...

AI Technical Summary

Problems solved by technology

However, when encountering a viscous fluid, when the compound pump injects the step, that is, when the valve core is in the initial position of closing the color paste injection, the color paste in the color paste bucket can be sucked into the compound pump or discharged from the compound pump. Press the color paste back into the color paste bucket, a considerable part of the viscous liquid flows back to the color paste bucket from the short circuit, but the viscous color paste does not pass through completely, or does not pass through a large number of injection channels and a small amount of injection channels state, which reduces or loses the anti-blocking effect of a large number of injection channels and a small amount of injection channels, so there is a risk of blockage of a large number of injection channels or a small amount of injection channels

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