Small-pump strong-back-flow and large-pump single-outpouring type combined pump valve

Abstract

The invention discloses a small-pump strong-back-flow and large-pump single-outpouring type combined pump valve. The combined pump valve comprises a large-small pump of a piston structure and a control valve, wherein the control valve is used for controlling the circulation of the large-small combined pump; the large-small pump of the piston structure is characterized in that a small pump cavity is arranged at the bottom end of an outlet in a large pump cavity, a small piston extends out of the end surface of a large piston in the large pump cavity, the small piston and the small pump cavity form a small pump, and a large pump and the small pump form the combined pump; and the control valve comprises a valve body and a valve element, wherein a valve element cavity for containing the rotaryvalve element is formed in the valve body, and the valve element is arranged in the valve element cavity. According to the combined pump valve, a large-volume outpouring channel and a small-volume outpouring channel are dredged by means of the strong pressure of the outpouring step of the combined pump, so that in the implementation step, supplementing can be timely carried out when the interiorof the combined pump is vacuum, and therefore the phenomenon that the interior of the combined pump waits for a long time for vacuum filling can be avoided.

Description

technical field [0001] The invention relates to the technical field of paint toning, in particular to a single-injection composite pump valve with strong backflow of a small pump and a single injection of a large 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 compound 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 th...

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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