JPH0985189A - Method of washing small article parts and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the washing degree of small article parts when washing the small article parts of hydraulic equipment by lowering the contamination degree of a washing liquid and also removing foreign matter stuck on the thread partes and the groove parts thereof in a short time. SOLUTION: Small article parts are housed in a housing part 10, an opening/ closing device 14 is closed, and a washing liquid is jetted into the housing part 10 from a hydraulic unit 42 through a line 11. After the lapse of a fixed time, the opening/closing device 14 is opened to jet dry air generated by an air pump 13 into the housing part 10 together with the washing liquid. By jetting the high pressure washing liquid and the dry air, foreign matter stuck on the small article parts is removed in a short time, and the foreign matter is caused to flow out to a line 15 from the housing part 10 together with the washing liquid. The foreign matter mixed in the washing liquid is removed by a centrifuge 16 and a filter 18 and is housed in a tank 17. The washing liquid from which the foreign matter has been removed and whose contamination degree is lowered is lifted up by the hydraulic unit 12 and is circulated to the housing part 10 again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method and a cleaning device for small parts, and more particularly, to remove foreign matter adhering to a screw part or a groove part of a small part in a short time to improve the cleaning degree. The present invention relates to a cleaning method and a cleaning device.

[0002]

2. Description of the Related Art In order to smoothly operate a mechanical device that uses hydraulic oil as power transmission means or lubrication or cooling means, it is important to manage pollution by reducing contaminants (contaminants) in hydraulic oil. There is. Currently, NAS (American Aerospace Association standard) 1638 and ISO (International Organization for Standardization) 4406 are widely used as standards for the degree of oil pollution.

In the method of measuring the degree of pollution (cleanliness) by NAS, first, 100 ml of oil is sampled in a clean bottle. Next, the quantity is counted for each size of contaminant contained in 100 ml of oil. Then, the contamination degree grade is determined by the size and quantity of contaminants. The state with the best degree of pollution is grade 00, and as the degree of pollution worsens, the number of grades increases to grade 0, grade 1, grade 2, and so on.

In order to reduce the degree of pollution of the oil used in the hydraulic equipment, the hydraulic equipment is disassembled every appropriate period of use, and the pump,
It is necessary to remove foreign matters by washing valves, actuators, pipes and small parts.

Conventionally, when cleaning small parts of hydraulic equipment, as shown in FIG.
2 is put and the basket 1 is immersed in the cleaning tank 4 filled with the cleaning liquid 3. Then, the operator swings the basket 1 vertically and horizontally in the cleaning liquid 3 to remove foreign matters such as dust and metal powder attached to the small parts. Alternatively,
There is also known a method of attaching an ultrasonic wave generator to the cleaning tank 4 and applying vibration to the cleaning liquid 3 to ultrasonically clean the small parts 2, 2.

Further, as shown in FIG. 4, small parts 2, 2
Foreign matter adhering to the male screw portion 2a, the female screw portion 2b, the groove portion 2c, etc. is removed by the wire brush 5, and the cleaning tank 4 is again used.
It is immersed in the cleaning liquid 3 inside and the cleaning is repeated.

[0007]

Conventionally, foreign matter removed from small parts falls into the cleaning liquid, so that foreign matter may adhere to other small parts when they are dipped. It is difficult in terms of cost to replace the cleaning liquid anew each time, and in fact, many small parts are cleaned with the same cleaning liquid several times to several tens of times. For this reason, the degree of contamination of the cleaning liquid becomes the NAS 11 grade or higher, and the cleaning degree of small parts gradually deteriorates.

Further, since the foreign matters attached to the screw portions and the groove portions of the small parts are hand-washed one by one with the wire brush, it takes a long time to wash and it is difficult to completely remove the foreign matters.

Therefore, when cleaning small parts of hydraulic equipment, it is a technical problem to be solved in order to reduce the degree of contamination of the cleaning liquid and to remove foreign matter adhering to the screw part or groove part of the small parts in a short time. Issues arise,
An object of the present invention is to solve this problem.

[0010]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and stores small parts in a storage part and sprays a cleaning liquid into the storage part from one end of the storage part to maintain a constant level. After closing the other end of the time storage unit, the other end of the storage unit is opened again, and when the other end of the storage unit is open, dry air is sprayed into the storage unit together with the cleaning liquid, and the storage A cleaning liquid that has flowed out from the other end of the section is stored in a tank after removing foreign matter by a filtration device, and a cleaning method for small parts in which the cleaning solution in the tank is circulated to the storage section; and
A pipe-shaped storage part for storing small parts is provided, a cleaning liquid pump and an air pump are connected to one end of the storage part, an opening / closing device is provided at the other end of the storage part, and a cleaning liquid tank is provided through a filtration device. And a cleaning device for small parts formed so that the cleaning liquid in the tank is pumped up by the pump.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall view of a cleaning device for small parts. A pipe-shaped storage part 10 for storing small parts is provided, and a pipe line 11 is connected to one end of the storage part 10. The pipe line 11 is branched into two directions. One side is provided with a hydraulic unit 12 having a built-in cleaning liquid pump, and the other side is connected with an air pump 13 for generating dry air.

Further, the opening / closing device 1 is provided at the other end of the storage section 10.
4 is provided, and the tank 17 is connected by a pipe line 15 via a centrifugal separator 16. A filtration device 18 is attached to the tank 17 to remove foreign substances such as dust and metal powder having a small particle size, which are mixed in the cleaning liquid. Then, the suction pipe line 19 of the hydraulic unit 12 is connected to the tank 17, and the cleaning liquid in the tank 17 is pumped up to store the storage portion 10.
It is formed to circulate to. Reference numeral 20 is a spare valve for simultaneously connecting a plurality of storage parts.

FIG. 2 shows the storage portion 10, and the storage portion 10
The one end 10a and the other end 10b are respectively removable, so that the small parts 2, 2 ... To be cleaned can be easily stored in the storage section 10. The pipe line 11 is connected to one end 10a of the storage unit via a self-sealing coupling 21, and the cleaning liquid sent from the hydraulic unit 12 is jetted into the storage unit 10 from the one end 10a as described later. .

At the other end 10b of the storage portion, the opening / closing device 14 is provided.
Is provided, and the opening / closing device 14 is opened / closed by a control signal from a control device (not shown), so that the cleaning liquid in the storage portion 10 flows out to the pipe line 15.

Next, a method for cleaning the small parts 2, 2, ... Of the hydraulic equipment by the cleaning device will be described with reference to FIGS. 1 and 2. First, after accommodating small parts inside the accommodating portion 10, the opening / closing device 14 is temporarily closed. Next, the hydraulic unit 12 is driven to draw up the cleaning liquid in the tank 17, and the cleaning liquid is pressure-fed from the pipe line 11 to the storage unit 10 at a pressure of 7 kg / cm ² or more.

The cleaning liquid is sprayed from one end 10a of the storage unit into the storage unit 10 and, after 10 seconds or more has elapsed, the opening / closing device 14 is opened. When the opening / closing device 14 is open, the dry air together with the cleaning liquid is sprayed from the one end 10a of the storage unit into the storage unit 10. Dry air is continuously or intermittently jetted at a pressure of 4 kg / cm ² or more to generate bubbles in the cleaning liquid in the storage unit 10 to enhance the cleaning effect.

Thus, by injecting the high-pressure cleaning liquid and the dry air, foreign matters such as dust and metal powder adhering to the small parts 2, 2 ... Foreign matter that adheres is easily and quickly removed,
Together with the cleaning liquid, it flows out from the other end 10b of the storage portion to the conduit 15.

Of the foreign substances mixed in the cleaning liquid, relatively large foreign substances are removed by the centrifuge 16. After that, the cleaning liquid returns to the tank 17, and the filtering device 18 removes foreign matters having a small particle size.

Therefore, the foreign matter mixed in the cleaning liquid does not remain, and the cleaning liquid in the tank 17 can be pumped up again by the hydraulic unit 12 and circulated to the storage portion 10 for reuse. The opening / closing timing of the opening / closing device 14 can be arbitrarily changed depending on the storage amount of small parts and the degree of contamination.

As a result, the degree of contamination of the cleaning liquid sprayed into the storage portion 10 becomes NAS 6 or less, and the cleaning degree of small parts becomes extremely good. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0021]

As described above, in the present invention, the foreign matter mixed in the cleaning liquid is removed by the filtration device, so that the cleaning liquid is less contaminated and the cleaning performance of small parts can be improved. Further, by injecting the high-pressure cleaning liquid and the injecting dry air, the foreign matters adhering to the small parts are instantly removed, and the foreign matters adhering to the screw portions and the groove portions are easily and quickly removed. The cleaning effect can be enhanced without labor.

Further, since the cleaning liquid having no foreign matter remaining therein is circulated to the storage portion and reused, the cleaning liquid need only be replenished for the shortage and need not be replaced, which contributes to cost reduction and allows the worker to use the cleaning liquid. Since it is not touched directly, it is an invention that has various kinds of effects, such as no possibility of adversely affecting the human body.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is an overall view of a cleaning device for small parts.

FIG. 2 is a front view of a storage section.

FIG. 3 is a partially cutaway perspective view showing a conventional method for cleaning small parts.

FIG. 4A is an explanatory view showing a conventional method for cleaning a male screw portion of a small component. (B) is explanatory drawing which shows the conventional cleaning method of the female screw part of a small component. (A) is explanatory drawing which shows the conventional cleaning method of the groove part of a small component.

[Explanation of symbols]

 2 Small parts 10 Storage part 12 Hydraulic unit 13 Air pump 14 Opening / closing device 16 Centrifuge 17 Tank 18 Filtration device

Claims (2)

[Claims] 1. A small part is stored in a storage unit, a cleaning liquid is sprayed from one end of the storage unit into the storage unit, the other end of the storage unit is closed for a certain period of time, and then the other end of the storage unit is opened again. When the other end of the storage unit is open, dry air is injected into the storage unit together with the cleaning liquid, and the cleaning liquid that has flowed out from the other end of the storage unit is cleaned of foreign matter by a filtration device to remove the foreign matter from the tank. And a cleaning liquid for the tank is circulated to the storage portion. 2. A pipe-shaped storage portion for storing small parts is provided, a cleaning liquid pump and an air pump are connected to one end of the storage portion, and an opening / closing device is provided at the other end of the storage portion and a filtration device is provided. A cleaning device for small parts, characterized in that a cleaning liquid tank is connected through the pump and the cleaning liquid in this tank is pumped up by the pump.