JPH07303881A - Method and apparatus for removing floated oil - Google Patents

Abstract

PURPOSE:To easily remove the floated oil in a washing tank having a lid by a simple device. CONSTITUTION:In a washing tank 30 having a slide type lid 32, the scraper 47 scraping floated oil to move the same is provided to the rear surface of one end of the lid 32 so as to be suspended downwardly in a shakable manner and the length of the scraper 47 is equal to the inner width of the washing tank 30 and the lower end thereof is set to a position slightly lower than the overflow weir 30a provided in the tank 30 and close to the front wall of the tank 30 when the lid 32 is closed and comes to the position close to the overflow weir 30a when the lid 30 is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating oil removing method and apparatus for removing oil and light dust floating on the liquid surface of a cleaning tank such as a degreasing cleaning device.

[0002]

2. Description of the Related Art As a conventional example of a device for removing oil or the like floating on a liquid surface of a cleaning tank or the like, FIGS. 4 to 6 show a device using this removing device for an oil / water separator. 4 is a plan view of the oil-water separator seen from above, FIG. 5 is a front view of the same, and FIG. 6 is a side sectional view of the same. The apparatus shown in FIGS. 4 to 5 is an elongated rectangular parallelepiped having a relatively high height, and includes a main tank 1, a scraping device 2 for scraping floating oil, an oil tank 3, a liquid level stabilizing device (not shown), and treated water. And a water pump (not shown) that supplies water into the main tank 1. The main tank 1 is composed of two perforated plates 11 and 12 having a rectifying function, which are an introduction chamber a, a floating chamber b,
It is divided into the discharge chamber c. The floating chamber b is provided with an oil collecting plate 13 formed of a corrugated plate inclined from the upper left to the lower right in FIG. Further, as shown in FIG. 6, the oil collecting plates 13 are arranged in parallel in the horizontal direction at regular intervals to form one layer, and a plurality of tanks are stacked at regular intervals in the vertical direction. Further, the center of the oil collecting plate 13 of the lower set is arranged between the two oil collecting plates 13, 13 which are adjacent to each other and constitute the upper layer.

The scraping device 2 is a floating chamber b of the main tank 1.
Endless belt 21 stretched horizontally in the upper part of the
And a motor 22 that rotationally drives the endless belt 21 in a direction opposite to the clockwise direction in FIG.
A scraping plate 23 is fixed to the endless belt 21 at equal intervals. The oil tank 3 is the main tank 1.
Main tank 1 fixed to the end of the tank and connected to the oil tank 3
The terminating end of the scraping device is a slope 14, and the tip of the scraping plate 23 of the scraping device 2 slides on the upper surface of the slope 14. As a liquid level stabilizer (not shown), a kind of overflow weir is used so that the treated water overflows from the weir when the surface of the treated water exceeds a certain height, and the height of the water becomes constant. can do. The water level of the main tank 1 is determined by the height of the overflow weir of this liquid level stabilizer. On the other hand, the position of the liquid surface of the main tank 1 is adjusted so that the tip of the scraping plate 23 of the scraping device 2 is submerged in water as shown in FIG.

In this oil-water separator, waste water (treatment water) collected in a pit or the like is introduced by a water pump into the introduction chamber a of the main tank 1.
Send to. The treated water flows from the introduction chamber a through the perforated plate 11 and gently flows in the levitation chamber b in the horizontal direction. In this state, a large oil content floats up due to the difference in specific gravity from water, collides with the back surface of the oil collection plate 13 and is collected, and the oil content collects and further coarsens. The coarsened oil moves on the back surface of the oil collecting plate 13 in the reverse direction of the drainage and upward, and floats above the end of the oil collecting plate 13 and floats on the water surface of the floating chamber b. . The floating oil is scraped by the scraping device 2 and collected in the oil tank 3. The treated water from which the floating oil has been removed is diverted from both sides of the oil collecting plate 13, moves horizontally, and is sent to the discharge chamber c through the next perforated plate 12. The liquid level stabilizer is connected by a siphon through the outlet hole of the discharge chamber c.

[0005]

When immersion degreasing cleaning or the like is performed, oil or light dust that has separated from the object to be cleaned due to cleaning floats on the water surface (hereinafter these are referred to as floating oils),
When the object to be cleaned is pulled out of the cleaning liquid after the cleaning is completed, the floating oil re-attaches to the surface of the object to be cleaned, and the cleaning effect is significantly impaired. However, in the system of covering the cleaning tank with the lid during the cleaning process, the scraping device as described above cannot be used to remove the floating oil. In addition to this, there is also a system for removing the floating oil by injecting wind or liquid from one direction onto the liquid surface, but this system is insufficient to remove the floating oil at a position far from the injection nozzle. In addition, there is a problem that the structure becomes complicated and the cost becomes high. The present invention is intended to solve the above-mentioned conventional problems by improving the cleaning effect without using a special floating oil removing device.

[0006]

Therefore, the present invention is a method of immersing an object to be cleaned in a cleaning tank having a slide type lid and closing the lid to clean the same, after the cleaning is completed, the lid is opened. At the same time, a scraper integrated with the lid moves on the liquid surface of the cleaning tank to discharge the floating oil from the cleaning tank, which is a means for solving the problem. Further, in the present invention, in a cleaning tank having a slide-type lid, a scraper is vertically oscillated vertically on the lower surface of one end of the lid, and the length of the scraper is substantially equal to the inner width of the tank and the lower end is At a position slightly lower than the overflow weir provided in the tank, when the lid is closed, it is close to the front wall of the tank, and when the lid is closed, it is close to the overflow weir. It is configured and is used as a means for solving the problem.

[0007]

Operation: The lid is opened to immerse the object to be cleaned in the bath, and the lid is closed to perform degreasing cleaning. At this time, the scraper is located near the front wall in the tank. As the cleaning progresses, floating oil is generated and floats on the liquid surface. After cleaning, open the lid and take out the object to be washed, but when opening the lid, the scraper moves together with the lid and pushes the floating oil toward the overflow weir. Cease to exist. Therefore, when the object to be cleaned is pulled up from the liquid surface, the floating oil does not redeposit on the cleaned object to be cleaned, and the cleaning efficiency is remarkably improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 3 show an embodiment of the present invention, and FIG. 1 shows a part of a cleaning device to which a floating oil removing device of the present invention is applied. 1 is a perspective view, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. In FIG. 1, 30 is a degreasing cleaning tank, 30a is an overflow weir provided inside the degreasing cleaning tank 30,
1 is a water cleaning tank, 32 is a lid for the degreasing cleaning tank 30, and these are a part of a cleaning device for machine parts and the like, and the objects to be cleaned are sequentially transferred from the left side to the right side in FIG. Then, it is immersed in each tank and processed. Since an alkaline liquid having a high temperature is used for degreasing and cleaning, the degreasing and cleaning tank is covered with a lid 32 for keeping heat during processing. Reference numeral 33 denotes two square rails fixedly installed across the degreasing cleaning tank 30 and the water cleaning tank 31, 34 denotes four rollers fixedly mounted on the lower surface of the lid 32 via a bracket 35, and 36 denotes a lid. Three
Two covers fixed to both ends of 2, 37 is cover 3
6, a chain fixed linearly on the lower surface of 6, a shaft 38 rotatably supported by bearings 39 passing through a gap between the degreasing cleaning tank 30 and the water cleaning tank 31, and 40 fixed at both ends of the shaft 38. Two sprockets that mesh with the chain 37, 41 is a sprocket that is also fixed to the shaft 38, 42 is a deceleration motor fixed to the tank via a bracket 43, and 44 is an output shaft of the deceleration motor 42. A sprocket is formed, 45 is a chain wound around the sprocket 44 and the sprocket 41, 46 is a handle, 47 is a scraper, and 48 is a hinge that supports the scraper 47.

The lid 32 runs on the square rail 33 via four rollers 34, and reciprocates in the direction of arrow C (FIG. 1) for a certain distance to close or open the upper portion of the degreasing and washing tank 30. The length in the direction of arrow C is longer than that of the degreasing / cleaning tank 30 by the gap between the two tanks. Further, as shown in FIG. 2, the cover 32 is moved by opening and closing the cover 32 by rotating the sprocket 40 via the sprocket 44, the chain 45, the spoutket 41, and the shaft 38 by the speed reduction motor 42. Is driving. However, the lid 32 may be opened and closed manually, and the handle 46 (FIG. 1) is provided for this purpose. As shown in FIG. 3, the scraper 47 has a lid 3
2 is vertically attached downwardly via a hinge 48 near one end of 2, and the tip is slightly submerged in the liquid surface and can be swung in the direction of arrow D. When the lid 32 is closed, degreasing cleaning is performed. When the lid 32 is opened, it comes close to the front wall of the tank 32 and comes close to the overflow weir 30a.

The operation of the embodiment constructed as described above will now be described. The deceleration motor 42 is energized to open the lid 32 to a predetermined position, and the object to be cleaned is immersed in the degreasing cleaning tank 30 with a hanger (not shown). Then, the deceleration motor 42 is energized to close the lid 32 to a fixed position. The scraper 47 is stopped near the front wall of the degreasing cleaning tank 30. The fixed position is detected by a limit switch (not shown), and in the case of manual operation, a stopper (not shown) is used. Then, the circulation of the cleaning liquid starts, the liquid level rises to the position of the overflow weir 30a, and degreasing cleaning is performed. In this case, oil or light dust floats on the liquid surface, and a part of the oil or dust is discharged over the overflow weir 30a.

When the processing for a certain period of time is completed, the circulation of the cleaning liquid is stopped and the lid 32 is opened, but the floating oil floating on the liquid surface is pushed by the moving scraper 47 and the overflow weir 30.
It is discharged beyond a and the floating oil does not exist on the liquid level in the tank on the opposite side of the overflow weir 30a. In this state, the object to be cleaned is pulled out and taken out. Therefore, the floating oil does not redeposit on the cleaned object, and the cleaning efficiency is significantly improved. In addition, in the open position of the lid 32,
Although the scraper 47 is close to the overflow weir 30a,
Even if the scraper 47 comes into contact with the weir 30a, the scraper 47 swings, so that the scraper 47 does not receive a large force. After that, the next object to be cleaned is dipped, the lid 32 is closed, and the above steps are repeated. However, the liquid level is lowered by drawing and putting in the object to be cleaned, and when the lid 32 is closed, the lower end of the scraper 47 is the liquid. It does not move away from the surface and sweeps the liquid surface. In addition, in the present embodiment, the scraper 47 is always directed downward through the hinge 48, but the water cleaning tank 31
Guides (part of which moves up and down), scraper 4 on the side of
It is needless to say that the pin 7 is provided so that the scraper 47 is lowered when the floating oil in the water washing tank 31 is scraped off and the scraper 47 is rotated around the hinge 48 and returned from the liquid surface when returning.

[0012]

As described above in detail, according to the present invention, the scraper is attached to the lid for opening and closing and the liquid level is swept by using the opening and closing operation of the lid. A simple and inexpensive device that does not take up space without using a complicated floating oil removing device can significantly improve the cleaning effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a floating oil removing device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a plan view showing a conventional oil-water separator.

5 is a front sectional view of FIG.

FIG. 6 is a side sectional view of FIG.

[Explanation of symbols]

 30 Degreasing cleaning tank 30a Overflow weir 31 Water cleaning tank 32 Lid 33 Square rail 34 Roller 35 Bracket 36 Cover 37 Chain 38 Shaft 39 Bearing 40, 41, 44 Sprocket 45 Chain 46 Handle 47 Scraper 48 Hinge

Claims (2)

[Claims] 1. A method of cleaning an object to be cleaned by immersing the object to be cleaned in a cleaning tank having a slide type lid and closing the lid, and after the cleaning is completed, the lid is opened and a scraper integrated with the lid is used. A method for removing floating oil, which comprises moving on the liquid surface of a cleaning tank and discharging floating oil from the cleaning tank. 2. In a cleaning tank having a sliding lid, a scraper is vertically oscillated vertically on the lower surface of one end of the lid, and the length of the scraper is substantially equal to the inner width of the tank.
And the lower end is located slightly lower than the overflow weir provided in the tank, close to the front wall of the tank when the lid is closed, and close to the overflow weir when the lid is closed. A floating oil removing device characterized in that it is configured to be worn.