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Plunger pump and quantitative liquid discharging device

A plunger pump and plunger technology, applied in the field of plunger pumps and liquid quantitative ejection devices, can solve problems such as inability to eject liquid and poor accuracy

Active Publication Date: 2019-12-10
NAKA LIQUID CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that when the plug 6 is blocked, air will enter the exhaust passage 3, and a predetermined amount of liquid cannot be ejected from the pump chamber, and the accuracy of quantitative ejection will deteriorate.

Method used

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  • Plunger pump and quantitative liquid discharging device
  • Plunger pump and quantitative liquid discharging device
  • Plunger pump and quantitative liquid discharging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Embodiments of the present invention will be described with reference to the drawings. In addition, in the following description, the advancing and retreating direction of the plunger 23 is set as figure 1 In the up and down direction, set the forward direction to the down direction and the exit direction to the up direction.

[0037] Figure 1 ~ Figure 4 A liquid quantitative discharge device 10 according to one embodiment of the present invention is shown. Such as figure 1 , figure 2 As shown, the liquid quantitative ejection device 10 includes: a plunger pump 20, a valve 12 (also referred to as a "first valve") that opens and closes the introduction path 21 of the plunger pump 20, and a lead-out path 22 that opens and closes the plunger pump 20. The valve 13 (also referred to as "second valve"), the plunger driving mechanism 40 that makes the plunger 23 reciprocate, the reciprocating movement of the plunger 23 and the first valve 12 and the second valve 13 are...

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PUM

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Abstract

The invention provides a plunger pump and a quantitative discharging device for accurately performing quantitative discharge. The plunger pump (20) includes a pump body (24) in which a pump chamber (25) is formed; and a plunger which moves forward and backward with respect to the pump chamber (25). The pump body (24) is provided with an introduction passage (21) for introducing a liquid into the pump chamber (25); a discharge passage (22) for discharging the liquid from the pump chamber (25); and an exit passage (51) provided at one end side in the advancing / retracting direction of the plungerso as to be communicated with the pump chamber (25) and allowing the plunger to exit from the pump chamber (25), and the exit passage (51) is provided with a passage width by which the plunger is reciprocable and which is substantially equal to an outer diameter of the plunger. An air vent (52) opened and closed by the reciprocation of the plunger is opened in the passage wall.

Description

technical field [0001] The present invention relates to a plunger pump and a liquid quantitative ejection device, in particular to a plunger pump and a liquid quantitative ejection device capable of performing quantitative ejection with high precision. Background technique [0002] Conventionally, a plunger pump including a pump main body forming a pump chamber inside and a plunger that moves forward and backward relative to the pump chamber has been proposed (for example, Patent Document 1). The plunger pump is provided with an introduction path for introducing a liquid into the pump chamber and a discharge path for leading the liquid out of the pump chamber, and a liquid storage container for storing the liquid is connected to the introduction path. In the state where the liquid is filled into the pump chamber, the inlet passage is closed, the outlet passage is opened, and the plunger is advanced, whereby the liquid corresponding to the volume of the plunger inserted into ...

Claims

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Application Information

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IPC IPC(8): F04B53/06F04B53/16F04B13/00F04B17/03F04B49/22F04B49/06
CPCF04B13/00F04B17/03F04B49/06F04B49/22F04B53/06F04B53/162F04B53/02F04B53/10F05B2210/11F05B2240/57
Inventor 千叶匡泰永井优宽高阶豪川添拓磨木村友亮
Owner NAKA LIQUID CONTROL