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Liquid leakage detection device

A detection device, leakage technology, applied in the measurement device, by detecting the appearance of fluid at the leakage point, fluid pressure actuation device, etc., can solve the problems of reduced sealing performance of the main seal, damage to the periphery of the piston rod, leakage of working oil, etc.

Inactive Publication Date: 2019-01-04
KYB CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After long-term use of hydraulic cylinders, etc., there may be cases where the sealing performance of the main seal decreases or the outer circumference of the piston rod is damaged, resulting in a slight leakage of working oil from the cylinder.

Method used

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  • Liquid leakage detection device
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Embodiment Construction

[0011] Hereinafter, the present invention will be described based on the illustrated embodiments. The liquid leakage detection device A of the present invention is applied to the buffer D. Such as figure 1 As shown, the composition of the buffer D includes: a cylindrical cylinder 1; a piston rod 2 that can move in the axial direction relative to the cylinder 1 and enters and exits the cylinder 1; 2 connected pistons 3 . In addition, in the case of this example, the damper D is filled with hydraulic oil as a liquid in the cylinder 1 .

[0012] Specifically, the cylinder 1 in the damper D is divided into an expansion-side chamber R1 and a compression-side chamber R2 filled with hydraulic oil by a piston 3 slidably inserted into the cylinder 1 and connected to a piston rod 2 . In addition, the piston 3 is provided with a damping passage 4a and a damping passage 4b, wherein the damping passage 4a exerts resistance to the flow of working oil from the expansion side chamber R1 to...

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PUM

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Abstract

This liquid leakage detection device comprises: a sensor section (12) for detecting liquid present between a plurality of seals (8, 9) which are axially arranged on the inner periphery of a shaft support member (7) in which a shaft (2) is inserted in a movable manner, the plurality of seals (8, 9) sealing the outer periphery of the shaft (2); and a determination section (13) for determining, on the basis of detection of liquid by the sensor section (12), whether or not liquid leakage has occurred.

Description

technical field [0001] The invention relates to an improvement of a liquid leakage detection device. Background technique [0002] In a hydraulic cylinder or the like including a cylinder and a piston rod that moves in and out of the cylinder, the outer periphery of the piston rod is sealed by a main seal to prevent hydraulic oil from leaking out of the cylinder. After long-term use of hydraulic cylinders, etc., the sealing performance of the main seal decreases, or the outer circumference of the piston rod is damaged, and a small amount of hydraulic oil may leak from the cylinder. [0003] As a liquid leakage detection device that automatically detects the leakage of the above-mentioned working oil, there is, for example, disclosed in Japanese Patent JPH06-207608. A funnel-shaped receiving part is provided below the cylinder end, and the working oil leaked from the outer periphery of the piston rod is stored in a bottomed container. A liquid leakage detection device that m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/04F15B20/00G01M3/38
CPCG01M3/16F15B15/1461F15B20/005F15B19/005F16J15/3296F16J15/004G01M13/005G01M3/2869G01M3/025G01M3/38G01M3/26F15B20/00G01M3/04G01M3/2815
Inventor 大木纪知
Owner KYB CORP