JPS59183103A - Device for minimizing quantity of fluid leaking from constituent on damage of constituent in hydraulic power system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for minimizing the amount t-of fluid leaking from a component in a hydraulic power/stem when the component breaks, for example when a hose ruptures.

Hand-held hydraulic tools, such as road crushers and rock drills, are supplied with hydraulic pressure t' by a hose connected through a prime mover for a power source, such as an easel engine or a gasoline engine, to a tank that serves as a fluid reservoir. Fluid is supplied.

Such hoses undergo severe wear and tear during use, resulting in splits or cracks. The hydraulic fluid must be at least 200 psi even when the tool is not in operation, i.e. during standby or rest periods.
Since fluid is constantly circulating through these hoses at a pressure of 9/≠, the fluid leaks at a high rate through the cracks in the walls of the hoses. This could lead to quite significant losses of expensive working fluids and would create an unacceptable risk to the on-site environment and environment.

In some cases, leaks can be maintained at a fairly acceptable level if the town notices the leak early enough and shuts down the prime mover.

However, in most cases, especially if the hose is long, the operator may not notice a leak until sufficient fluid loss has occurred.

It is therefore an object of the present invention to provide a #C fix for minimizing the amount of fluid leaking from a component in a hydraulic power system when that component fails.

Provided in accordance with the seven aspects of the present invention is an apparatus for minimizing the capping of fluid leaking from a component in a hydraulic power tank stem when the component is damaged, which includes a tank for use as a reservoir for hydraulic fluid. The tank includes a first chamber for storing a main volume of fluid and a reference volume of fluid above the main volume.
a second chamber communicating with the 8gl chamber for storing e);
means for deactivating the power source of the system when the fluid M in the second chamber drops below a predetermined level as a result of fluid leakage from the system; For a given amount of fluid entering or leaving the tank in the evening, fluctuations in the fluid level in the second chamber will cause
release to the activity of a fluid power source dimensioned to be greater than the corresponding fluid level fluctuation that would occur in the first chamber if it were only to enter the first chamber or only to exit the first chamber; The means to that end are number one! Placed indoors
It is preferable to turn on the liquid level switch when the liquid level has run out.

Suitably, the tank includes an expansion chamber communicating with the second chamber.

According to another aspect of the invention, a hydraulic power/stem includes the device described above.

The cooling cup of the present invention will be described below with reference to the accompanying drawings.

The device It#'i, a tank providing shelter for the hydraulic fluid that serves as the working fluid in a conventional hydraulic power system incorporating all the hoses and other similar components and a power source such as an easel engine or a gasoline engine. 1 is included.

Pyri 1 has a lowermost chamber 2 for storing the main volume of fluid.
and an upper chamber 3 for storing a small reference volume of fluid;
The upper volume 4, which communicates with the upper chamber 3 and serves as an expansion chamber, is fully enclosed. The upper chambers 3 and 4 are housed in an extension 5 of the lowermost chamber 2.

The top wall 6 of the RF chamber 20 comprises a lower inlet for fluid returning from the system during use, while the side wall 8 of the chamber 2 comprises an outlet 9 for supplying all fluids to the system for use. .

The upper chamber 3 has the front i10 of the tank 1 and the wall].

A vertical groove component 1 with an open end is formed in contact with the K bath. The expansion chamber 4 is located at the base of the layer component 11.
jl is formed in the extension 5 by the extending flanone 12 and adjacent walls 10° 13. 14. of the tank 1. and welded to 15.

The flanking element 11 terminates proximate the extension 50 on the top wall 16, and a series of drainage holes 17 are provided in the wall 18 of the component 11.
19. It is located near its base among the 20 parts. The holes 17 provide a 1''j population of fluid entering the expansion chamber 4 from the chamber 3 or leaving the expansion chamber 4 and entering the chamber 3tζ. A conventional oil filter element 21 for an oil filter or cut pipe depends from the top wall I6 of the extension 50, and the element 21 extends into the chamber 3 formed by the cutout 11.

A conventional level gauge 22 is mounted on the wall of the tank 1 to provide a visual indication of the liquid level within the expansion chamber 4. A conventional liquid level limit switch 23 (shown schematically)
It is located just above 7. This switch 23
is electrically VC connected by means (not shown) to a power source, such as a gasoline engine or an easel engine, so that when the fluid in chamber 3 drops to the level of switch 23, The switch is powered! , to stop the flow of fluid within the system.

In FIG. 2, during normal operation of the seven stem, fluid 24 fills the lowermost chamber 2 and forms a liquid column 25 in chamber 3 above the level of switch 23. In FIG. The fluid level 26 in chamber 3 will remain substantially constant if operation is normal, but if the liquid column 25 forms a fluid reference volume, the relative Because of the dimensions, the liquid level fluctuations in the reference chamber are much larger than the liquid level fluctuations that would occur in the F blade chamber 2 if the same volume of fluid entered or exited the lower chamber 2 only. Therefore, a small amount of fluid lost from the lower chamber 2 causes a rapid and substantial change in the liquid level within the reference volume.

In FIG. 3, if a leak in the 7 stem occurs as a result of a tear in the hose or the like, the fluid 24
leaves tank l and the level 26 of fluid in reference chamber 3 drops until it reaches a limit switch as shown in FIG. In this condition, switch 23 turns off the power source and prevents further leakage of fluid from the /stem.

The drain hole 17 is designed to prevent leakage by ensuring that once a severe leak occurs within the stem, the dome passing through the drain hole 17 is much less than the fluid lost from the reference volume.
It is dimensioned to prevent fluid entering from the expansion chamber from refilling the reference chamber.

By choosing the dimensions of the reference chamber 3 excessively, the volume of fluid leaking from the tack 1 during component failure can be limited to very low levels.

A manual override should be fitted to the level switch to prevent the opening power source from being turned off after maintenance or repair of the fluid reservoir.

The device substantially eliminates fluid expansion problems throughout the temperature range associated with outdoor operations.

[Brief explanation of the drawing]

7 is a schematic perspective view of the device, with a portion cut away at the front to show its interior. FIG. 2 is a front view of the present device showing the liquid level during normal operation. Figure 3 is a diagram similar to Figure 2, showing the liquid level after the /stem is at rest. ]... Tank 2... First chamber, lowest chamber, 3... End! chamber, upper chamber, 4...expansion chamber, upper chamber, 23...liquid level limit switch. 19

Claims (1)

[Claims] / When a component within the hydraulic power system is damaged,
A device for minimizing the amount of fluid leaking from this component, the 'fJ11'6 self-mounting includes a tank for use as a cypress for the zeta pressure fluid, said tank comprising: A first chamber for storing the entire main body of hydraulic fluid, a second chamber communicating with the first chamber for storing a reference volume of fluid volume, and a second chamber communicating with the first chamber for storing the reference volume of the fluid volume, means for deactivating the seven-stem power source when the power source drops below a predetermined level as a result of a leak, the dimensions of said chamber being adapted to a given violet of liquid entering or leaving the tank. On the other hand, No. Fluctuations in the fluid level within the
Hydraulic power dimensioned to be greater than the corresponding fluid level fluctuations that would occur in the chamber if it were only to enter the chamber or only to exit from the first chamber. /A device for minimizing the amount of fluid leaking from a damaged component within the stem. J. A display according to claim 1, characterized in that the means for deactivating the power source include a liquid level switch located in the second chamber. 3. Device according to claim 1 or 2, characterized in that the tank includes an expansion chamber communicating with the second chamber but spaced apart from the first. ≠ Substantive VC described fc table device j with reference to the attached drawings.
Hydraulic power/stem including 9ifc position.・