JPH0539614U - Filtration device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a rotary filtration drum arranged in a tank for supplying cutting oil mixed with chips, which constitutes a filtration device,
It is an object of the present invention to provide a rotary filtration drum having a bone nucleus structure that prevents damage to a filter cloth stretched over the rotary filtration drum. [Structure] At least one side plate is a large-diameter annular side plate,
A short cylinder is fixed to the diameter of the side plate as a rotary cylinder that also serves as an outlet of filtered cutting oil, and a bone nucleus body having a thick round rod at the top between the both side plates is incorporated and fixed. It is a skeleton with a filter stretched.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filtering device.

[0002]

[Prior art]

 The technology which is the base of the present invention is already disclosed in Japanese Patent Publication No. 44564/1985 and Japanese Patent No. 8802/1983, in Japan, and registered in the United States as patents 4,895,647. It is the invention described in Japanese Patent No. 4,992,167.

[0003] When explaining the outline of the invention, removes the chips from the cutting oil was Tsu mixed cuttings discharged from metalworking machine groups during operation, re-use cutting oil Remove the chips It is a filtration device for

A schematic configuration of this device will be described with reference to FIGS. A rotary filter drum 4 is constructed by arranging a filter 1 around the circumference of a drum, and arranging an underflow outlet 3 for discharging filtered cutting oil on at least one side plate 2 of the drum. A charging port 5 for charging the cutting oil and a sprinkling unit 6 for separating the cutting oil and the cutting chips and throwing the separated cutting chips are arranged, and the cutting chips are precipitated on the bottom plate, and at least one side plate 7 is rotated. The ring of the rotary filtration drum 4 is placed inside the charging tank 8 which is configured so that it can be rotated while looking at the circular outlet 3 of the filtering drum and the cutting oil can flow out from the circular outlet 3 to the outside of the charging tank. The side outlet 1 is arranged so that the flat outlet 3 can be seen, and the charging tank 8 is provided with a scraping plate 9A for moving the chips accumulated on the bottom plate of the charging tank 8 to the tip of the throwing portion while scraping. The conveyor 9 and the rotary filtration drum 4 are driven by the power transmission from the power source 10. It is constructed by arranging such.

As the power source 10 of this filtering device ages, the conveyor 9 and the rotary filtration drum 4 arranged inside the charging tank 8 are driven, and cutting oil mixed with cutting chips is charged into the charging tank. .. The cutting oil mixed with the cutting chips, which has been put into the throwing tank 8, passes through the filter which is spread around the circumference of the rotary filtration drum and enters the inside of the rotary filtration drum 4. The chips separated from the cutting oil settle on the bottom plate of the charging tank 8. The cutting oil that has entered the inside of the rotary filtration drum 4 flows out as filtered cutting oil from the annular outlet 3 provided on the side plate of the rotary filtration drum 4 into the cutting oil receiving tank 11 arranged adjacent to the charging tank. To do. Cutting oil The cutting oil flowing out to the receiving tank 11 is pumped out through a mechanism such as a pump (not shown). The chips that have settled on the bottom plate of the charging tank 8 are transferred to the tip of the throwing section 6 while being scraped by the conveyor 9 having the scraping plate 9A, and are discharged to the outside from the tip.

If cutting chips adhere to the filter 1 which is stretched around the circumference of the rotary filtration drum 4, it causes clogging. Therefore, air or liquid is jetted from the inside of the rotary filtration drum 4 to blow the cutting chips. The injection port 12 is arranged so as to be skipped and removed.

[0007] This filter uses a thin stainless plate with small holes sprinkled in it. When chips cut into the small holes, they cannot be blown off even if air or liquid is sprayed. , Use a filter cloth for this filter.

Then, in order to stretch the filter cloth around the circumference of the rotary filtration drum, as shown in FIG. 3, the spanning bars are fixed at intervals around the circumference of the side plates 2 constituting the drum, A frame 2A having an annular rib fixed to this spanning rod was constructed, and a filter cloth was fixed to this frame. However, it has been found that the frame of the conventional rotary filtration drum has a defect in stretching the filter cloth.

It is because the rotary filtration drum 4 rotates in a charging tank 8 into which cutting oil containing cutting chips is charged, and the filter cloth 1 stretched around the body of the rotary filtration drum 4 contains cutting oil. While the pressure rises from the surface of the cutting oil mixed with the cutting chips that has been put into the charging tank 8 and is immersed again in the cutting oil mixed with the cutting chips, the pressure at the time of immersion is adjusted. As shown in FIG. 3, the cloth 1 is repeatedly received by the skeleton 2A, and cracks are generated at the contact surfaces of the bridging rods and the annular ribs which are parts of the skeleton 2A, and the filter cloth 1 must be replaced often. There was an inconvenience that it would not happen.

[0010]

[Problems to be solved by the device]

 In view of the above situation, the present invention solves the problem of a filter cloth stretched around the circumference of a rotary filtration drum arranged in the above-mentioned type of filtration device, and does not require replacement for as long as possible. It is an object of the invention to provide a rotary filtration drum with a skeleton to which the filter cloth can be stretched.

[0011]

[Means for Solving the Problems]

 A rotary filtration drum was constructed by arranging a filter around the circumference of the body and arranging an annular outlet for flowing out the filtered cutting oil on at least one side plate, and using it as an inlet for introducing cutting oil mixed with cutting chips. The bottom plate is provided with a sparging part for precipitating the chips and sprinkling the chips separated from the cutting oil.At least one of the side plates can be rotated by looking at the annular outlet of the rotary filtration drum. Inside the charging tank configured to allow the cutting oil to flow out of the side plate from the annular outlet, the annular outlet of the rotary filtration drum is looked into the charging tank side plate, and from the annular outlet of the rotary filtration drum, A device that injects air or liquid from inside the filter of the rotary filtration drum is arranged except for the device. At the same time, the chips that have settled on the bottom plate of the tank are moved to the tip of the throwing part while scraping into the tank. Scraper board In a filtration device configured by arranging a rotary filtration drum and a conveyor so as to be driven by power transmission from a single or separate power source, inside the input tank of the filtration device, At least one of the both side plates is a large-diameter annular side plate, and a short circle is fixed to the diameter of the side plate as a rotary cylinder that also serves as an outlet for the filtered cutting oil, and both side plates are thick rounded on the top of the frame. The bone core formed by arranging the rods is assembled and fixed, and the outlet of the filtered cutting oil of the rotary filtration drum, which is formed by tensioning and fixing the filter on the bone core, is seen from the side plate of the input tank. I arranged it freely.

[0012]

[Operation] Since the skeleton of the rotary filtration drum is constructed as described above, the filter cloth stretched around the skeleton is not in contact with the angular skeleton but is flexibly contacted as shown in FIG. Become.

[0013]

【Example】

 The method of attaching the rotary shaft of the rotary filtration drum may vary depending on the configuration of the bearings of the charging tank. However, in this specification, the rotary filtration arranged in the charging tank of the type shown in FIGS. 1 and 2 is used. The drum will be described.

As shown in FIG. 4, the rotary filtration drum according to the present invention has at least one side plate of the side plates 21 and 22, that is, in the illustrated embodiment, the side plate 22 indicated by the right side 22 has a large diameter. It will be an annular side plate. Plates 21A and 22A for suspending a drive transmission material such as a chain are fixed to the outer sides of the opposite side plates 21 and 22, respectively. A short cylinder is fixed to the diameter of the large-diameter annular side plate 22 as a rotary cylinder 23 that also serves as an outlet for the filtered cutting oil. A rotary shaft is arranged at the center of the side plate on the other side.

Further, between the opposite side plates 21 and 22, the bridging rods 24a ... N are arranged in parallel and are fixed to the outer peripheral edges of the side plates 21 and 22 at a constant interval. Then, on the top surface of the bridging rods 24a ... n, a thick round bar 25a .. And fix it so that there is no step.

Further, between the side plates 21 and 22, between the side rods 21..n having the thick round rods 25a. Arrange ribs 26a ..... n parallel to 22. On the top surface of the annular ribs 26a ... n, a large difference is formed between the thick round bar 27a ... n and the round bar 24a ... n fixed to the top surface of the bridging bar 24a. Fix it by crossing over without it. With this, a skeleton body 29 as a skeleton for assembling the rotary filtration drum 30 is formed.

The annular rib referred to in the present invention is not limited to an annular plate having a cutout portion for incorporating a bridging rod on the outer peripheral edge, and a short rod as shown in the figure is provided between the bridging rods. Thus, it includes those fixedly formed in a mold that is parallel to the side plate and approximates the outer periphery of the side plate.

A filter cloth 28 is stretched on the skeleton body 29 of the rotary filtration drum in which the skeleton body 29 as the above-mentioned skeleton is arranged between the side plates 21 and 22. Although not shown, the filter cloth 28 has a structure in which, for example, a reinforcing plate around which bolt insertion holes are formed is arranged. This is aligned with the bolt insertion hole formed in the skeleton as a skeleton, and both are fastened with bolts and nuts to fix them. This constitutes the rotary filtration drum 30.

When the rotary filtration drum 30 is rotated by another drive transmission means instead of being rotated by a drive transmission means such as a chain, a member suitable for the other drive transmission means is used instead of the above-mentioned plate. Will be installed in. The rotary filtration drum 30 of the type described above, in which the rotary filtration drum 30 configured as described above is disposed on at least one side plate of the charging tank described in the section of the prior art, with the outflow port 23 of the rotary filtration drum being viewed. Place as.

Next, the state of the pressure applied to the filter cloth stretched around the circumference of the rotary filtration drum 30 will be described. The filter cloth 28 of the rotary filtration drum 30, which is constantly rotated while the filter cloth 28 is immersed in the cutting oil mixed with the cutting chips, which is put into the charging tank, rises from the surface of the cutting oil mixed with the chips. Even if air or liquid is sprayed, viscous cutting oil adheres to the surface of the filter cloth 28, resulting in loss of air permeability. When the rotary filtration drum 30 with the filter cloth 28 stretches and immerses into the cutting oil mixed with the cutting chips in the feeding tank, the rotary filtering drum 30 rises through the cutting oil mixed with the cutting chips after the immersion. Until then, it is strongly pressed against the bone nucleus rod, which is the frame of the rotary filtration drum, under the pressure of cutting oil mixed with cutting chips. Therefore, of course, when the bone nucleus rod, which is a skeleton, is constructed as described in the prior art, the top surface of the bridging rod or the like is rounded, or a small-diameter round rod is arranged instead of having roundness. If it is only removed, the filter cloth will be cracked from the above pressure.

As a result of carefully repeating the experiment on this point, the present inventor fixed thick round bars 25a ... n, 27a ... n to the top surface of the frame component as shown in FIG. When the filter cloth 1 pressed by the cutting oil mixed with the chips put into the feeding tank is brought into contact with the bone nucleus body 29, the bone nucleus body 29 is brought into contact with the bone nucleus body 29. It has been found that it is possible to handle cutting oil mixed with cutting chips with some deflection. This proposal is based on this phenomenon.

[0022]

Effects of the invention]

 By constructing the skeleton of the rotary filtration drum arranged in the above type of filtration device as described above, it is possible to effectively prevent the occurrence of cracks in the filter cloth stretched around the rotary filtration drum.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a type of filtration device equipped with a rotary filtration drum according to the present invention.

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

FIG. 3 is an explanatory view of a state in which a filter stretched around a frame of a conventional rotary filtration drum receives pressure.

FIG. 4 is a partially cutaway perspective view of a rotary filtration drum provided with a bone nucleus body according to the present invention.

FIG. 5 is an explanatory view of a state in which a filter stretched around a bone nucleus according to the present invention is under pressure.

[Explanation of symbols]

21, 22 Side plate of rotary filtration drum 23 Rotating cylinder that also functions as an outlet of filtered cutting oil from the rotary filtration drum 24a ... n Overhanging rod 25a ... n Round bar 26a ... n Annular rib 27a ... n Round bar 28 Filter cloth 29 Bone nucleus 30 Rotating filtration drum

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B01D 33/58 B23Q 11/00 U 7908-3C

Claims (1)

[Scope of utility model registration request] 1. A rotary filtering drum, which is constructed by arranging a filter around the circumference of a cylinder and arranging an annular outlet for discharging filtered cutting oil on at least one side plate, and introducing cutting oil mixed with cutting chips. The inlet and the bottom plate are equipped with a sprinkling unit for precipitating the chips and discharging the chips separated from the cutting oil.At least one of the side plates has a circular outlet of the rotary filtration drum. The rotary filtration drum has a ring filtration outlet that is located inside the charging tank configured so that the cutting oil can flow out of the side plate through the ring filtering outlet. A device for injecting air or liquid from the inside of the filter of the rotary filtration drum is seen from the annular outlet, and the chips that have settled on the bottom plate of the charging tank are thrown into the charging tank while scraping. Scraping plate that moves to the tip of the part In a filtration device configured to have a rotary filter drum and a conveyor arranged to be driven by power transmission from a single or separate power source, Inside, at least one of the both side plates is a large-diameter annular side plate, and a short cylinder is fixed to the diameter of the side plate as a rotating cylinder that also serves as an outlet for the filtered cutting oil, and both side plates are thickened to the top of the skeleton. The bone nucleolus configured by arranging the round rods of the above is installed and fixed, and the outlet of the filtered cutting oil of the rotary filtration drum configured by tensioning and fixing the skeleton with the filter is installed in the input tank. A filtering device characterized by being rotatably arranged so that it can be seen through the side plate.