JPH0317991Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cleaning system that circulates liquid, and in particular improves efficiency when cleaning liquid using a cyclone and a sedimentation tank.

After long-term use, mechanical parts become dirty due to wear and sludge that has entered from outside, and iron powder and sand in the sludge prevent parts from operating smoothly and prevent the parts from performing their functions. I've lost it.

Conventionally, these sludges have been removed using an ultrasonic cleaner or the like, but the removed sludges then contaminate the solvent. Therefore, although it has been attempted to filter the solvent using a filter or the like, the filter often becomes clogged. In addition, the distillation method requires a large amount of thermal energy and is therefore impractical, and the centrifugation method also requires a considerable amount of power and is not preferred from the viewpoint of energy conservation.

The present invention provides an apparatus that can recover solvent with a fraction of the power of a centrifugal separator.

This will be explained below with reference to the drawings.

In the figure, reference numeral 1 denotes an ultrasonic cleaning tank, in which parts to be cleaned 2, 2, 2 are stored in a basket 3 and transported by a roller chain device 4. 5 is a petroleum solvent placed in the tank. Reference numeral 6 denotes an ultrasonic vibrator attached to the bottom of the tank, which is driven by an oscillator (not shown). Reference numeral 7 denotes a commonly used cyclone, into which the dirty solvent from the ultrasonic cleaning tank 1 is fed by a pump 8. T is a timer that drives the pump 8 for about 0.5 minutes every 5 minutes. 9 is a pressure gauge. An outlet 10 at the bottom of the cyclone communicates with a bunker 11. 12 is a lower bunker take-out valve. Reference numeral 13 is a sedimentation tank, into which part of the solvent 5 is taken in from the dispensing valve 14 of the bunker 11, and small particles contained in the cleaning liquid from the inner cylinder 15 of the cyclone 7 are collected through a side passage valve. 16. 17 is a valve for taking out the sediment. 18 is a transfer valve that sends the upper layer liquid of the settling tank 13 to the ultrasonic cleaning tank. Cleaning liquid from the inner cylinder of the cyclone 7 is also sent into the cleaning tank 1.

The solvent sent out from the inner cylinder 15 of the cyclone device is fed to the ultrasonic cleaning tank 1 through a pipe.
A part of the solvent sent out from the inner cylinder 15 of the cyclone device is fed to the settling tank 13 by a pipe branching from the above-mentioned pipe. A side valve 16 is attached to this pipe to adjust the flow rate.

In the above apparatus, the solvent in the cleaning tank contaminated with iron powder and sand from parts due to ultrasonic cleaning is sent to the cyclone 7 by the pump 8. The solvent is subjected to centrifugal force in the cyclone, and the sludge with a high specific gravity settles down the inner wall of the cyclone and is sent into the bunker. The cleaning liquid, which has a low specific gravity and is subjected to upward pressure at the lower part of the cyclone, becomes an upward flow and is ejected from the cyclone inner cylinder 15 to the outside and transferred to the ultrasonic cleaning tank. This circulation system continues for about 5 minutes, during which time a jet stream is generated in the cleaning tank 1 to remove dirt such as mud that is difficult to remove with ultrasonic cleaning.

However, there is a limit to the particle size of sludge that can be separated by a cyclone.

That is, the separated limiting particle ds is g: Gravitational acceleration 9.8m/s ² u: Viscosity of liquid rs: Specific weight of sludge ψ ₀ : Flow velocity at cyclone inlet r ₁ : Inner radius of cyclone r ₂ : Radius of cyclone inner cylinder hi: From upper end of bunker to lower end of inner cylinder Height r ₀ : This is the inner radius of the cyclone inlet and is determined by the machine dimensions of each part of the cyclone. If the critical particle size is lowered, loss resistance increases, so the particle size of the cyclone itself cannot be reduced below a certain level. The present invention solves this problem by utilizing a cleaning tank.

In the present invention, two types of passages are provided from the cyclone to the settling tank 13: one is a small outlet provided at the top of a normal bunker, and the other is a passage through which a portion of the solvent taken out by the cyclone inner cylinder is bypassed. These include valves 14 and 16. In this way, the liquid containing minute sludge with a particle diameter below the separation limit of the cyclone 7 flows from the side valve 16 into the settling tank, and the small outlet valve 1
From No. 4, a liquid containing sludge with a particle size larger than the separation limit of the cyclone flows into the settling tank. Moreover, by spouting the liquid from the small outlet valve 14, the sedimentation speed of the sludge in the cyclone can be increased and the separation effect can be enhanced.

Note that the supernatant liquid in the settling tank 13 is returned to the cleaning tank 1 through the valve 18.

Note that when the liquid in the cleaning tank 1 is transferred to the cyclone 7 by the pump 8, the amount exceeding the allowable inflow amount on the cyclone side is returned to the ultrasonic cleaning tank 1 through a side channel 19.
may be provided.

As explained above, according to the present invention, even the smallest amount of sludge can be removed in the sedimentation tank by the bypass valve 16, and while the ultrasonic cleaning tank can be efficiently carried out in fresh water state, the cleaning tank is intermittently A jet stream is generated to mechanically remove dirt that is difficult to remove with ultrasonic cleaning, increasing the cleaning efficiency for various types of dirt, and the cyclone and sedimentation tank remove sludge in the solvent to ensure cleanliness at all times. This has the advantage that efficient cleaning can be carried out in liquid.

[Brief explanation of the drawing]

The figure is a system diagram of the proposed device. 1...Ultrasonic cleaning tank, 2...Object to be cleaned, 6...
Ultrasonic vibrator, 7...Cyclone, 9...Pressure gauge, 11...Bunker, 13...Washing tank, 14...
...Small outlet valve, 16... Side passage valve.

Claims (1)

[Scope of claim for utility model registration] An ultrasonic cleaning tank, a cyclone device to which dirty solvent from the ultrasonic cleaning tank is supplied, and a solvent sent from the inner cylinder of the cyclone device to the ultrasonic cleaning tank. a pipe; a settling tank to which the solvent sent out from the bunker of the cyclone device is supplied; a means for feeding the supernatant liquid of the settling tank to the ultrasonic cleaning tank; and a pipe branching from the pipe for feeding a part of the solvent to the precipitation tank.