Pump capable of outpouring color paste in large amount or in trace amount

Abstract

The invention discloses a pump capable of outpouring color paste in large amount or in trace amount. The pump comprises a big reciprocating type displacement pump which comprises a big reciprocating part, a big pump body and a big pump inlet and outlet; a small reciprocating part which is fixed with the big reciprocating part is arranged in the big pump body, a small pump body is arranged in a base of the big pump body, and the small pump body is provided with a small pump inlet and outlet. According to the pump capable of outpouring the color paste in large amount or in trace amount, for the reciprocating type displacement pump, by means of a large-section pump, color paste outpouring in large amount and color paste outpouring in trace amount can both be achieved, the precision of color paste outpouring volume is guaranteed, and particularly, the outpouring precision of a trace amount of the color paste is guaranteed; compared with the prior art, the precision is high, the structure is simple, the anti-leakage performance is good, the utilization rate in the length direction of a reciprocating pump cylinder body is high, and elastic deformation of a pump support is small, so that the precision of the reciprocating pump stroke is improved, and the problem that accumulated air in the pump severely affects the precision of outpouring the color paste in trace amount is solved. A color mixer made through the pump is convenient to use and small in occupied area.

Description

Technical field [0001] The invention relates to the field of reciprocating pumps, in particular to a reciprocating pump that not only injects large amounts of slurry but also injects fine slurry in a small amount. Background technique [0002] In the field of toning technology, the use of reciprocating pumps to inject quantitative colorants is a key technology. At present, common reciprocating positive displacement pumps include piston pumps, plunger pumps, and folding pumps. Toning has strict requirements on the amount of color paste. When the pump is injecting a large amount of color paste (such as greater than 15 ml), the error in the amount of color paste cannot exceed a certain percentage (such as less than 1%). The error in the amount of color paste injected for small amounts of color paste (such as less than 0.5 ml) cannot exceed a certain percentage (such as less than 12%). However, the current common reciprocating pumps with a large amount of fine grouting have a large ...

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Problems solved by technology

[0003] In addition to the shortcomings mentioned above in the prior art and the key points to solve the problem, the US2009236367A1 patented product also has the following defects: (1) When the pump is not used for a long time, and the color paste is thick and may not be pressed down, it is necessary to increase the strength Press down, because the spring has a certain elastic limit, the piston and the wall have a certain friction, the spring is easily deformed when injecting a large amount of color paste, causing the error of the pump injection stroke; (2) The sliding device is either in the middle or on both sides Both need to be particularly well sealed to prevent the color paste from leaking out

(3) The spring pre-tightening force must be set. When the spring pre-tightening force is set too high, the power of the motor will be too large, which will waste energy. It is easy to cause deformation, displacement and vibration of the frame, which will lead to changes in the stroke of the pump rod and affect the accuracy of the pulp output; (4) When the spring pre-tightening force is set small and the resistance of the color paste is large, it is easy to cause spring compression and affect the output. The accuracy of slurry volume; (5) The gas in the pump will seriously affect the accuracy of small metered color paste injection

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