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Strainer

A coarse filter and filter material technology, applied in the field of coarse filter, can solve problems such as pump failure

Inactive Publication Date: 2019-11-22
YAMASHIN FILTER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, in the invention described in Patent Document 1, the operating oil containing air bubbles passes through the suction filter and is pumped out, and there is a possibility that the pump may malfunction due to air bubbles inhaled by the pump.

Method used

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  • Strainer
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Examples

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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, a suction type strainer provided inside the hydraulic oil tank will be described as an example, but the strainer of the present invention is not limited to the suction type strainer provided inside the hydraulic oil tank. In addition, the suction strainer of the following embodiment filters working oil, but the fluid filtered by the strainer of the present invention is not limited to working oil.

[0024] figure 1 It is a figure which shows the outline of the hydraulic oil tank 100 in which the suction-type strainer 1 which concerns on one embodiment of this invention is installed inside. in figure 1 In this, the main part of the working oil tank 100 is seen through, and a part is shown in cross-section. It should be noted that in figure 1 In the case of the cross section, hatching is omitted.

[0025] The hydraulic oil tank 100 is ins...

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Abstract

The present invention is capable of removing air bubbles contained in a liquid and preventing the removed air bubbles from re-contaminating the liquid. A second filter part, having a substantially cylindrical shape formed by folding a thin sheet-like filter medium into pleats and joining both ends, is provided inside a first filter part having a substantially cylindrical shape formed by folding athin sheet-like filter medium into pleats and joining both ends, in a manner such that the second filter part does not come into contact with the first filter part. A substantially cylindrically-shaped outer tube, having a height greater than the first filter part and the second filter part, is provided outside the first filter part in a manner such that the outer tube does not come into contact with the first filter part. In a substantially disk-shaped top plate covering the top side of the first filter part, the second filter part, and the outer tube, a plurality of first air vent holes areformed between the outer tube and the first filter part in planar view and a plurality of second air vent holes are formed between the first filter part and the second filter part in planar view.

Description

Technical field [0001] The present invention relates to coarse filters. Background technique [0002] Patent Document 1 discloses a working oil tank device of a construction machine in which a return-type filter and a suction filter are coaxially coupled. The upper end surface of the suction filter and the lower end surface of the reflux filter are separated by a predetermined distance L. [0003] Prior technical literature [0004] Patent Document 1: Japanese Patent Application Publication No. 2000-309945 [0005] In working machines (for example, hydraulic equipment), working oil (liquid) returning from a hydraulic circuit to a tank usually contains many bubbles. In the invention described in Patent Document 1, it is only to avoid the direct flow of working oil containing air bubbles from the return-type filter to the suction filter (equivalent to the coarse filter). When the working oil containing air bubbles flows into the suction filter, it causes bubbles and operation. The oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/00B01D24/00B01D29/00B01D29/07B01D35/02E02F9/00F15B1/26
CPCB01D19/00E02F9/00F15B1/26B01D19/0031B01D29/58B01D36/001B01D35/153B01D2201/291B01D2201/298B01D35/0276B01D29/07
Inventor 石塚信
Owner YAMASHIN FILTER CORP