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Liquid delivery device and liquid delivery method

A technology of conveying device and conveying direction, which can be used in liquid variable volume machinery, pumps with flexible working elements, machines/engines, etc., and can solve problems such as difficulties

Inactive Publication Date: 2017-04-12
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is desired to determine both the compressed position and the released position of the fingers by the cam in this way, it will be difficult to set the tolerances of the cam and the fingers.

Method used

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  • Liquid delivery device and liquid delivery method
  • Liquid delivery device and liquid delivery method
  • Liquid delivery device and liquid delivery method

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0043]

[0044] As an aspect of the liquid transport device used in this embodiment, a liquid transport pump 1 that transports a liquid by peristaltic motion of a tube will be described as an example. Representative examples of the liquid transported by the liquid transport pump 1 include water, saline solution, medicinal liquid, oil, fragrance liquid, ink, etc., but other fluid liquids may also be transported.

[0045] figure 1 It is a schematic cross-sectional view of the liquid-sending pump 1 of the first embodiment. The liquid delivery pump 1 has a tube 10 , a tube holding unit 20 , a drive unit 30 and a compression unit 40 .

[0046] The tube 10 is made of an elastic circular tubular material, and the liquid to be transported is filled in the circular tube. In addition, the tube 10 performs a peristaltic motion by being sequentially compressed by finger portions 41a to 41g described later, thereby transferring the liquid filled inside. In the liquid delivery pump 1, ...

no. 2 Embodiment approach

[0093] In the first embodiment, when the release operation is performed, the elastic body ( figure 1 The elastic bodies 42a to 42g) generate elastic force, thereby moving the fingers in the releasing direction, but the fingers may also be moved by other methods.

[0094] Figure 7 It is a schematic diagram showing the structure of the liquid-sending pump 2 of the second embodiment. In the liquid-feeding pump 2 , elastic members corresponding to the elastic bodies 42 a to 42 g of the liquid-feeding pump 1 are not provided. Other structures are roughly the same as the liquid delivery pump 1 .

[0095] In the present embodiment, the fingers 41 a to 41 g are moved in the releasing direction by the restoring force of the tube 10 during the release operation. That is, the finger portion is pushed up in the releasing direction by utilizing the force that the shape of the tube 10 that has been crushed during the compressing operation tends to return to its original shape. In this ...

no. 3 Embodiment approach

[0099] In the liquid delivery pump 3 of the third embodiment, the tube 10 is arranged in a circumferential shape, and the liquid filled in the tube is transported by compressing and releasing the tubes 10 radially around the central rotation axis. .

[0100]

[0101] Figure 8 It is a schematic diagram showing the structure of the liquid-sending pump 3 of the third embodiment. The liquid delivery pump 3 has a tube 10 , a tube holding unit 20 , a drive unit 30 and a compression unit 40 .

[0102] The tube 10 is the same as that described in each of the above-mentioned embodiments, but in the liquid feeding pump 3, the tube 10 is held as Figure 8 Such a circular shape (arc shape). In the present embodiment, the liquid is transported in the circumferential direction along the tube 10 maintained in a circumferential shape. That is, the conveying direction of the liquid is the circumferential direction.

[0103] The tube holder 20 has a guide wall 22 and a restriction wall ...

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PUM

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Abstract

The present invention provides a liquid conveying device and a liquid conveying method comprising: a plurality of fingers arranged in a conveying direction in which a liquid is conveyed by an elastic tube, and which compress or release the tube. reciprocating movement; and a driving part that moves a plurality of the fingers in the compression direction, the fingers move in the compression direction, and crushes the tube by the ends of the fingers, Therefore, the liquid inside the tube is transported along the transport direction, the shape of the crushed tube is restored, and the liquid is filled into the tube. In the liquid transport device, during the release operation , in a state where the end of the finger is in contact with the tube, the movement of the finger in the releasing direction is restricted to a predetermined position.

Description

technical field [0001] The invention relates to a liquid delivery device and a liquid delivery method. Background technique [0002] A peristaltic pump is known as a fluid transfer device (for example, refer to Patent Documents 1 and 2). In a peristaltic pump, the cam sequentially presses a plurality of fingers (also called pins, plungers) arranged along the tube, and uses the fingers to close the tube sequentially, thereby delivering the fluid in the tube. [0003] Compression and recovery of the tube is repeated using the fingers. As the tube ages, the ability to recover is attenuated, the volume of the tube (volume inside the tube) decreases during recovery, and the delivery accuracy decreases. Therefore, in Patent Document 1, even when the tube is expanded to the maximum (when the fingers are in the released position), the cross section of the tube is maintained in an elliptic shape to reduce the influence of aging. In addition, in Patent Document 2, the restoring for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B43/12
CPCF04B43/1223F04B43/08
Inventor 片濑诚
Owner SEIKO EPSON CORP
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