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Liquid delivery pump

一种送液泵、液体的技术，应用在泵、活塞泵、泵元件等方向，能够解决柱塞损伤等问题，达到劣化抑制、抑制送液精度的下降、抑制摩耗的效果

Active Publication Date: 2016-12-28
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the assembly tolerance of the pump head and the pump body, the positional relationship between the hole on the top surface of the pump body and the plunger seal is usually not the same. Therefore, if the inner diameter of the hole on the top surface of the pump body is too small, the inner peripheral surface of the hole and The outer peripheral surface of the plunger is in contact, and there are problems such as damage to the plunger

Method used

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  • Liquid delivery pump
  • Liquid delivery pump

Examples

Experimental program
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Embodiment Construction

[0026] As a preferred embodiment of the liquid-sending pump of the present invention, it can be enumerated that in the center of the surface of the gasket on the side of the pump body, a concave portion that is as large as the plunger passage hole or larger than the plunger passage hole is provided as a liquid passage structure. The center of the recess is provided with a through hole structure. With this configuration, the cleaning liquid flowing out of the cleaning space is stored closer to the plunger seal, and the cleaning liquid is easily supplied to the plunger seal.

[0027] In addition, grooves for passing the cleaning liquid from the cleaning space may be provided on the inner peripheral surface of the through hole of the gasket as a liquid passing structure. With this configuration, it is possible to prevent the plunger seal from entering the through hole of the gasket and to supply the cleaning liquid to the plunger seal.

[0028] In addition, as a liquid passage s...

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Abstract

A liquid delivery pump of the invention increases the sliding property between the outer circumferential surface of a plunger and the inner circumferential surface of a plunger seal and suppresses the deterioration of the plunger seal. A pump head is attached to the top end of a pump body in such a manner that the tip end of the plunger protruding from a plunger passage hole is inserted into a pump chamber. The plunger passage hole at the tip end surface of the pump body has an inner diameter having a size in which the cleaning liquid of a cleaning space flows out toward the pump head side. The plunger seal is mounted on the pump head, has a through hole for allowing penetration of the plunger, and holds the outer circumferential surface of the plunger and also seals an opening of the pump chamber. A backup ring is mounted on the pump head by being interposed between the plunger seal and the tip end surface of the pump body. The backup ring has a through hole, for allowing penetration of the plunger, formed in a manner not allowing the plunger seal to enter a gap to the outer circumferential surface of the plunger, and also has a liquid passage structure for allowing the cleaning liquid in the cleaning space to reach the plunger seal through the through hole.

Description

technical field [0001] The present invention relates to a plunger-type liquid-feeding pump which makes the tip of the plunger slide in a pump chamber provided in a pump head to repeatedly suck in liquid from a suction port and discharge liquid from a discharge port. The discharge, thus to carry out liquid delivery. Background technique [0002] The plunger type liquid delivery pump is equipped with a pump head with a pump chamber inside at the top of the pump body, and the crosshead holding the base end of the plunger is reciprocated in the axial direction of the plunger in the pump body to make the top of the plunger part slides in the pump chamber. [0003] The pump head is provided with an inlet flow path for the liquid to flow into the pump chamber and an outlet flow path for the liquid to flow out of the pump chamber, and check valves are respectively arranged on the inlet flow path and the outlet flow path. With such a structure, when the plunger is driven in the dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/18F04B53/00
CPCF04B53/162F04B9/02F04B53/007F04B53/02F04B53/146F04B53/164F04B53/18F04B53/00
Inventor 今村信也
Owner SHIMADZU SEISAKUSHO CO LTD
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