JPS62208855A - Filter - Google Patents

Abstract

PURPOSE:To aim at improvement in efficiency of filtration as well as to make any damage to filter cloth avoidable, by setting up a movable bucket, disposing a chip screening plate at the inside of a filter drum, free of slide motion, in case of a filter for chip oil. CONSTITUTION:When waste oil is fed to the inside of a rotating drum 3 from a feed pipe 11, it enters the inside of a movable filter 10 situated in a lower part inside the drum 3, whereby coarse chips are left behind by a punching plate and fine powder and the waste oil are filtered, and furthermore the waste oil alone is filtered by filter cloth 7 of the drum 3, thus it is recovered in a cutting oil recovery tank 1. And, the movable bucket 10 leaving chips behing is pressed by the stopper installed in a guide groove 8 and rotated to the right, making these chips drop in a conveyor by a charging plate 10d at an upper position, thus chips are discharged. Then, the movable bucket 10 discharging the chips is slips downward in order, and it is situated at a lower part. Thus, efficiency of filtration is improved, and since the charged waste oil will not hit directly to the filter cloth of the drum, its damage is avoidable in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for filtering chip oil (hereinafter referred to as waste liquid) mixed with metal chips.

Conventional technology Conventionally, as a device for filtering waste liquid containing rough chips and fine chips (hereinafter simply referred to as chips) generated in a metal cutting process, for example, a device is used to filter waste fluid containing coarse chips and fine chips (hereinafter simply referred to as chips) in a cutting oil recovery tank. A filtration drum (hereinafter referred to simply as the drum), which is covered with a mesh filter cloth that can be filtered and into which the waste liquid can be introduced, is rotated, and the waste liquid introduced into the drum is separated into chips and cutting oil. However, there is a known filtration device in which the separated chips are carried out from the drum using a carry-out mechanism, and the separated cutting oil is filtered through a filter cloth and flows into a cutting oil recovery tank to recover it from the nuclides. However, with this conventional device, the waste liquid that is put into the drum is collected by a fine mesh filter cloth stretched around the drum circumference, which receives the waste liquid mixed with coarse chips that are quite heavy, so there is a risk of damage to the filter cloth. This is so serious that the industry's challenge is to develop a mechanism to avoid this problem.

Problems to be Solved by the Invention It is an object of the invention to provide a filtration device that improves the filtration efficiency of the above type of filtration device and prevents damage to the filter cloth stretched over the filtration drum.

Means to solve problems Hereinafter, the present invention will be described in detail with reference to the drawings.

A bearing cylinder 2 is fixed to the left and right side plates of the cutting oil recovery tank 1, and a part of the drum 3 is inserted into the cutting oil recovery tank 1 using a post 5 attached to the annular plate 4 which is a side plate of the drum 3. It is rotatably supported in the inserted state.

The drum 3 has an opening at the center of the side plate, which is connected to an annular plate 4.
The above-mentioned post 5.5 is fixed to the opening of the annular plate 4, and scrapers 6 are arranged at regular intervals along the periphery of the annular plate 4, which is the side plate, and there are eyes on the outside that serve as a filter screen. A fine filter cloth 7 is stretched over it.

Inside the drum 3, guide grooves 8 having stoppers/pars 9 concentric with the rotational axis of the drum 3 are fixed to the inner surface of the annular plate 4, and guides W! (Multiple movable buckets on t8)
10 are each slidably supported.

As shown in the third diagram, the movable bucket 10 has left and right side plates each having a slide plate 10B curved with the same curvature as the guide groove 8, and a curved side plate 10A protruding from the slide plate 10B, and the other side plates are at least in the traveling direction of the movable bucket. The frame body has a chip input plate 10C in which the side plate disposed on the rear side is larger than the side plate disposed on the front side in the direction of travel, and the bottom side is a primary filtration screen along the curved surface of the curved side plate. A filter plate 100 made of a metal punch plate having a large number of pores.
to form. With the filter plates 100 of several such movable buckets (10) facing the filter cloth stretched on the filter drum, slide plates 10B protruding from the left and right curved plates are slid into the left and right guide grooves 8. They can be freely engaged with each other. The relationship between the circumferential length of the guide groove and the length of the curved side plate edges of the curved side plates of several movable buckets is that the sum of the lengths of the curved side plate edges of the movable buckets is greater than the guide groove circumference length. It is shorter than the circumference of the guide groove. This difference becomes the sliding range between the movable buckets arranged in the guide groove.

Note that the filter holes of the filter plate 1°D stretched over the movable bucket are made rougher than the filter cloth stretched over the filter drum.

As a means for supplying the waste liquid to be filtered, the waste liquid is fed from the bearing tube 2 on one side plate of the cutting oil recovery tank 1 to the drum by crossing the opening of the post 5 provided in the annular plate opening on one side of the drum l. A supply pipe 11 to be introduced into the drum 3 is attached, and the open end of the supply port of the supply pipe 11 is seen into the drum 3.

In the illustrated embodiment, a conveyor 12 is provided as a means for discharging the filtered chips to the outside, and this conveyor 12 has an upwardly opened cross section, and the opening is used to input the chips separated from the waste liquid in the drum. A conveyor duct 14 serving as an opening 13 is located at the axial center of the drum 3, and one end of the duct 14 is passed through the opening of a post 5 attached to one of the annular plates of the drum 3 to one side plate of the cutting oil recovery tank 1. Installed bearing bushing 2
At the same time, the other end is passed through the opening of the post 5 attached to the other side of the annular plate of the drum 1 through the bearing cylinder 2 fixed to the other side plate of the cutting oil recovery tank 1, and is inclined upward to the outside. The lower drum at the upper end of the incline is rotated by a motor (not shown).

The output is transmitted to it and it rotates.

A cleaning device is further provided above the drum 3 to remove chips adhering to the filter cloth of the drum and the filter plate of the movable bucket.

EMBODIMENT AND OPERATION The motor is started to rotate the drum 3, for example clockwise, to drive the conveyor. In this state, when the waste liquid is supplied into the drum 3 through the supply port of the supply pipe 11, the waste liquid is thrown into the movable bucket IO located at the lower part of the drum 3. The bucket 10 remains in that position for the above-mentioned possible rjh range while the drum 3, that is, the guide groove 8 arranged on the annular plate of the drum, rotates. When the bucket 9 collides with the rear end of the movable bucket, it is pushed by the stopper 9 and rotates clockwise together with the drum 3, moving upward inside the drum while gradually tilting. The moving part remains in the bucket) 10, and the chips and waste liquid are filtered by the punching plate of the movable bucket 10, and filtered by the filter cloth 7 stretched on the drum 3.
This further separates fine chips and filters only the waste liquid.

The filtered cutting oil is collected in a cutting oil recovery tank; i';
'>701≧ Therefore, it is pumped out to a predetermined place or container.

When the input plate 10C of the movable bucket 10 with the chips left therein reaches diagonally above the conveyor duct 14, the rough chips in the movable bucket 10 are dropped into the conveyor duct 14 through the input plate 10C. The fine chips separated by the filter cloth stretched on the drum are scooped up by a scraper 6 attached to the annular plate of the drum, and the chips retained in the corners of the scraper 6 are collected by the scraper 6, which is successively directed toward the top. When the scraper passes a point diagonally above the conveyor duct, it is caused to fall from a corner of the scraper into the conveyor duct due to its own weight.

The movable bucket and the several movable buckets preceding the movable bucket each perform the same function as the movable bucket until and even after being hit by the following movable bucket, and serve as stoppers in the guide groove. After the movable bucket and the preceding movable buckets that move after colliding with each other are placed on the stopper of the guide groove or the following movable bucket and pass through the uppermost position, the preceding buckets are reversed and moved by their own weight. The slide plate slides down the guide groove. The time during which the next movable bucket following the slid down movable bucket performs the above function and slides down becomes the distance of the above movable range, and during this time the preceding movable bucket stops within the drum and waste liquid is supplied to it. will be done.

Each bucket sequentially repeats the above-mentioned operation to perform predetermined filtration, and the chips that have fallen into the conveyor duct are discharged from the discharge port.

Effects In this way, the present invention has a movable bucket with a filtration function placed inside the filtration drum, so that the movable bucket performs a so-called secondary filtration, increasing the filtration efficiency. Since the waste liquid does not directly hit the filter cloth stretched over the filter drum, damage to the filter cloth can be avoided.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment according to the present invention, and FIG.
3 is a perspective view of the movable bucket, 1 is a cutting oil recovery tank, 2 is a bearing cylinder provided on the side plate of the cutting oil recovery tank, 3 is a filter drum, and 4 is a filter Drum annular plate, 5
is a boss provided on the annular plate of the filtration drum, 6 is a scraper provided at regular intervals on the annular plate of the filtration drum, 7 is a filter cloth stretched on the filtration drum, and 8 is a guide provided inside the annular plate. groove, 9 is a stopper provided in the guide groove, 10 is a movable bucket), IOA is a curved side plate of the movable bucket, IOB is a slide plate, IOC is a chip charging plate of the movable bucket, 100
11 is a filter plate stretched over a movable bucket; 12 is a supply pipe;
is the conveyor, 13 is the input port, and 14 is the conveyor duct.

Claims (1)

[Claims] In a filtration device that has a mechanism for rotating a filtration drum in a cutting oil recovery tank, which has a mechanism for supplying waste liquid mixed with chips and the like and a mechanism for transporting chips and the like separated from the waste liquid, the side plate of the filtration drum is A guide groove with a stopper is disposed inside the annular plate constituting the movable bucket, and a movable bucket with a chip sorting plate is slidably disposed in the guide groove by a slide plate provided on a side plate of the movable bucket. A filtration device.