JPS6359824B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention deals with the treatment of sludge-like particles containing metal scraps, abrasive grains from grinding wheels, and their binders contained in the grinding fluid used in roll grinders, etc. This invention relates to a grinding fluid treatment device for removing so-called sludge for reuse.

[Technical background of the invention and its problems]

Among these types of grinding fluid processing devices, a grinding fluid purifying device that collects and purifies the grinding fluid is generally known. Conventionally, as a method for removing sludge from the grinding fluid collected by such a device, one or more magnetic rollers are placed adjacent to each other in a container of a purification device and driven to rotate, and the sludge is removed by the magnetic action of the rollers. In conjunction with the suction of metal debris in the sludge, the entire sludge is adsorbed onto the circumferential surface of the roller, and is finally scraped off from the circumferential surface of the roller by a scraping plate and discharged to the outside.

However, in a configuration using such rollers, the recovery rate of sludge was not sufficient, and as the number of rollers increased, the structure became more complicated and failures increased, causing maintenance problems.

In addition, as another example, in the grinding fluid storage container,
There are also systems in which a conveyor equipped with a large number of scraping plates is driven to rotate, and the sludge is collected and removed from the grinding fluid in the container using these scraping plates.

However, in this case as well, the sludge recovery effect was extremely poor, and a sufficient sludge removal treatment effect could not be expected.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a grinding fluid treatment device that can perform more complete sludge recovery and removal processing, has a simple structure, and is less likely to malfunction.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention was made based on the fact that in order to improve the recovery rate of sludge, it is necessary to actively distribute sludge in an area where magnetic action is exerted. be. That is, the present invention basically includes a first grinding fluid storage container provided with a grinding fluid inlet, a second grinding fluid storage container provided adjacent to the first grinding fluid storage container, and the first grinding fluid storage container. a flat grinding fluid flow passage provided at the bottom of the first grinding fluid storage container, one end of which opens into the first grinding fluid storage container, and the other end communicating with the second grinding fluid storage container at a position higher than the bottom; and a magnetic means provided below the bottom of the first grinding fluid storage container that partitions the grinding fluid flow path, and a sludge carrying means provided at the bottom of the first grinding fluid storage container. It is something.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

[Embodiments of the invention]

In FIG. 1, 1 is a grinding fluid treatment device, 2 is a roll grinder that performs grinding work by being supplied with grinding fluid, and 3 and 4 are a grinding fluid inlet provided in the grinding fluid treatment device 1, and a grinding fluid inlet, respectively. A liquid outflow part 5 is a grinding liquid outflow part 4 of the grinding liquid treatment device 1 and a roll grinder 2
The grinding fluid supply pipe 6 connected between the grinding fluid supply pipe 6 is, for example, in the form of a cooling tower, through which the processed grinding fluid sent out from the grinding fluid outlet 4 is cooled once and sent to the roll grinding machine 2. A cooling device 7 is provided on the grinding fluid treatment device 1, and a cooling device 7 is connected to the roll grinding machine 2 and a grinding fluid inlet to send the grinding fluid used in the roll grinder 2, that is, waste fluid to the grinding fluid treatment device 1. This is the grinding fluid recovery piping connected between 3 and 3. FIG. 1 shows an outline of the grinding fluid supply system constructed as described above. In addition,
A pump for circulating the grinding fluid is provided between the grinding fluid supply pipe 5 and the grinding fluid recovery pipe 7, but is not shown.

The waste fluid contains sludge, which is a mixture of abrasive grains that fell off during grinding operations, binder from the grinding wheel, and even scraps of processed metal. Most of these sludges are collected and removed in the grinding fluid treatment device 1 and sent to the grinding fluid supply pipe 5 in a purified state for reuse.

In FIG. 2, the grinding fluid processing device 1 has a grinding fluid storage container 8, and the inside of the grinding fluid storage container 8 includes a first dirty tank 9, a second dirty tank 1.
0 and clean tank 11. Partition plates 12 and 13 are provided for this section.

The grinding fluid inlet 3 is connected to the first dirty tank 9.
The grinding fluid outflow section 4 is arranged in a clean tank 11. 14 is a device for returning oily components floating on the liquid surface of the clean tank 11 to the first dirty tank 9.

15 is a passage regulating member provided in the first dirty tank 9; 16 is a permanent magnet constituting the magnetic means; and 17 is a first sludge conveying body constituting the sludge conveying means; these are arranged in the first dirty tank 9. It is set up.

A second sludge transport body 18 constitutes another sludge transport means and is disposed across the second dirty tank 10 and the clean tank 11.

The first sludge conveyor 17 and the second sludge conveyor 18 each have an endless chain conveyor 19, 20, and a plurality of scraping plate members 21, 22 connected to the endless chain conveyor 19, 20 at a predetermined interval, respectively.
has. 23 is a driven shaft equipped with a sprocket wheel, which extends commonly to the first sludge transport body 17 and the second sludge transport body 18.

In FIG. 3, the grinding fluid inflow section 3 is connected to the inflow pipe 2.
4, and a buttful plate 25 inside connected to this lower end.
The lower end of the introduction pipe 26 is immersed in the grinding liquid 27 in the grinding liquid storage container 8. The passage regulating member 15 extends toward the bottom of the first dirty tank 9, and has a triangular cross section as shown in FIG. A bottom plate 30 is disposed along the bottom of the first dirty tank 9 and defines a flat grinding fluid flow path 29 between the bottom plate 30 and the bottom surface 28 of the bottom plate 30 . Therefore, the surface 28 forms the upper surface that defines the grinding fluid flow path 29, and the bottom plate 30 forms the lower surface. In this flat grinding fluid flow path 29, a scraping plate member 21 located below the first sludge conveyor 17 is adapted to move along a bottom plate 30. The direction of movement, that is, the direction of sludge conveyance, is perpendicular to the direction of flow of the grinding fluid, which is indicated by the arrow in the figure.

The permanent magnet 16 is disposed below the bottom plate 30 and includes at least an area adjacent to and corresponding to the grinding fluid flow passage 29 . In the embodiment, approximately the bottom plate 3
Permanent magnets 16 are provided over the entire area.

Reference numeral 31 denotes a connecting hole between the first dirty tank 9 and the second dirty tank 10, which is formed in the partition plate 12 at a position slightly above the level of the bottom plate 30, and communicates with the grinding fluid flow passage 29 through an inclined passage 32. are doing.

The second sludge conveyor 18 is along the bottom of the second dirty tank 10 and the clean tank 11, and passes through a communication hole 33 formed at the bottom of the partition plate 13 between the second dirty tank 10 and the clean tank 11. It's on.

In FIG. 4, the first sludge conveyor 17
has one end curved and extends upward, where it is connected to a conveyor drive motor 35 mounted on the apparatus body frame 34. Accordingly, the grinding fluid storage container 8 has an inclined discharge part 36,
A shooter 37 is connected thereto. A sludge collection box 38 is located below the lower end of the shooter 37.
is installed, and the sludge is discharged into the sludge collection box 38 as shown by the arrow. Further, in accordance with the curved configuration of the first sludge conveyor 17, the bottom plate 30 is also curved, and the permanent magnet 16 extends to the vicinity of the sludge discharge port 39 along the lower surface thereof.

The other second sludge conveyor 18 is constructed similarly to the first sludge conveyor 17 and is driven together by the conveyor drive motor 35.

As shown in FIG. 5, the permanent magnet 16 consists of a plurality of permanent magnets arranged at intervals,
As a result, the bottom plate 30 is always magnetized and a constant magnetic flux is formed within the grinding fluid flow path 29. Note that the permanent magnet 16 is connected to the grinding fluid flow path 29.
Not only the bottom side but also the top side, that is, the surface 28
It may be placed on the side. In this case, the passage regulating member 1
A permanent magnet 16 may be provided inside the magnet 5. Also,
Arrangement only on the surface 28 side is also possible.

The scraping plate member 21 is supported at both ends by the chain conveyor 19 and is conveyed in an upright state with respect to the bottom plate 30, and its width is the same as the grinding fluid flow path 29.
slightly smaller than the height of

In the grinding fluid treatment device of the present invention configured as described above, the waste fluid sent into the grinding fluid treatment device 1 from the grinding fluid inlet 3 first enters the first dirty tank 9 through the introduction pipe 26, and from there. The grinding fluid is forced to flow into the flat grinding fluid flow path 29. During this time, the sludge in the waste liquid descends due to gravity and is deposited on the bottom plate 30, and due to the magnetic action of the permanent magnet 16, magnetic sludge in the sludge, particularly metal scraps, is attracted to the magnetized surface of the bottom plate 30. Along with this, non-magnetic sludge also aggregates on the surface of the bottom plate 30 while being wrapped in magnetic sludge. Therefore, within this grinding fluid flow path 29,
Most of the sludge is accumulated, and the purified waste liquid passes through the inclined passage 32 and enters the second dirty tank 10 through the communication hole 31. Furthermore, the inclined configuration of the inclined passage 32 also allows the sludge to slide into the grinding liquid flow passage 29, so that the sludge can be accumulated in the grinding liquid passage 29 even more effectively.

The sludge accumulated in the grinding fluid flow path 29 is
The sludge is periodically carried out from the grinding fluid flow path 29 by the scraping plate member 21 of the sludge conveyor 17,
The sludge is discharged to a sludge collection box 38 shown in FIG. 4 via a sludge discharge port 39 and a shooter 37. Since these sludge discharge port 39 and shooter 37 are located above the level of the grinding fluid 27 in the grinding fluid storage container 8, only sludge is collected in the sludge collection box 38.
is discharged. Note that the first sludge transport body 17
The unloading operation may be adjusted depending on the amount of sludge accumulated, for example, using a timer.

The small amount of sludge that still remains in the second dirty tank 10 settles here and accumulates at the bottom, so it is discharged by the second sludge transporter 18 in the same way as the first sludge transporter 17. Ru. Then, the almost completely purified waste liquid is transferred to the clean tank 11 via the communication hole 33 into the second tank.
The grinding fluid is sent out as shown by the arrow in the figure, and is put to use again through the grinding fluid outflow pipe 40 of the grinding fluid outflow section 4.

In the embodiment, a structure in which the dirty tank is divided into two parts is disclosed, but a single tank is also possible.
The adhesion effect can be increased by magnetizing the surface to which the sludge is attached, as shown in Figure 0, but it is not necessarily necessary to magnetize the surface. Various changes are possible, such as

〔Effect of the invention〕

As described above, according to the present invention, a flat grinding liquid flow path is formed at the bottom of the first grinding liquid storage container such as the first dirty tank 9, and the grinding liquid is flowed therein to transfer the grinding liquid to the second dirty tank 10. The sludge is guided to a second grinding fluid storage container such as the above, and a magnetic means is arranged at the bottom of the first grinding fluid storage container to cause the sludge to adhere to the bottom and coagulate and deposit, resulting in an extremely high sludge recovery rate. The effects of this invention are extremely large, such as the ability to provide a grinding fluid treatment device with a simple structure and less trouble.

[Brief explanation of drawings]

The drawings show an embodiment of the grinding fluid treatment device of the present invention, and FIG. A schematic diagram of the liquid supply system, Fig. 2 is a top view of the grinding fluid treatment device, Fig. 3 is a cross-sectional view taken along the - line in Fig. 2, and Fig. 4 is a side sectional view of the main part along the - line in Fig. 2. , FIG. 5 is an enlarged explanatory view of the main part of FIG. 3. DESCRIPTION OF SYMBOLS 1... Grinding fluid processing device, 8... Grinding fluid storage container, 15... Passage regulating member, 16... Permanent magnet,
17... First sludge conveyor, 21... Scraping plate member, 29... Grinding fluid flow path, 30... Bottom plate.

Claims (1)

[Scope of Claims] 1. A first grinding fluid storage container provided with a grinding fluid inlet, a second grinding fluid storage container provided adjacent to the first grinding fluid storage container, and the first grinding fluid storage container. The second grinding fluid container is provided at the bottom of the container, has one end opening into the first grinding fluid storage container, and has the other end located at a position higher than the bottom.
a flat grinding fluid flow path communicating with the grinding fluid storage container; a magnetic means provided below the bottom of the first grinding fluid storage container that partitions the grinding fluid flow path; and a magnetic means provided at the bottom of the first grinding fluid storage container. A grinding fluid treatment device comprising: a sludge discharge means provided therein; 2. The grinding fluid treatment device according to claim 1, wherein the magnetic means comprises a plurality of permanent magnets. 3. The sludge carrying means includes a plurality of scraping plate members that are movable along the bottom of the first grinding liquid storage container and within the grinding liquid flow path, and a conveyor that moves these scraping plate members at predetermined intervals. A grinding fluid treatment device according to claim 1 or 2. 4 The grinding fluid flow path includes a first grinding fluid storage container and a second grinding fluid storage container.
It is formed by the bottom portion and a portion with a triangular cross section provided at the lower part of the passage regulating member that extends obliquely downward toward the bottom of the first grinding liquid storage container from the partition plate between the grinding liquid storage container and the first grinding liquid storage container. A grinding fluid treatment device according to claim 1, 2 or 3, characterized in that: