JPS61249272A - Grinding coolant recoverer - Google Patents

Abstract

PURPOSE:To make sludge efficiently stick to one side of a grinding coolant flow passage and condensedly accumulate it as well as to improve the recovery rate ever so high, by forming the narrow coolant flow passage in a grinding coolant housing vessel, and setting up a magnetic device in a position adjoining to one side partitioning off this passage. CONSTITUTION:The waste fluid fed to the inside of a grinding coolant recoverer 1 from a grinding cooland inflow part 3 first enters a first dirty tank 9 from an intake pipe 26 and then is made to forcedly flow into a narrow grinding coolant flow passage 29. During this while, sludge in the waste fluid goes down with gravity and accumulates on a bottom plate 30 of this passage 29, while magnetic sludge of metallic swarf or the like inparticular in this sludge is attracted to the magnetized bottom stone 30 by means of a magnetic action of a permanent magnet 16. And, with this magnetic attraction, nonmagnetic sludge also comes into a state of being wrapped by the magnetic sludge and is accumulated on a surface of the bottom plate 30. The sludge accumulated inside this passage 29 is carried out with a scraping plate member 21 of a sludge conveying body 17 to a recovery box 38.

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 the container of the purification device and driven to rotate, and the magnetic action of the rollers removes the sludge from the grinding fluid. In conjunction with the suction of metal debris, the entire sludge is attracted to the circumferential surface of the roller, and the sludge 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 is not sufficient, and as the number of rollers increases, the structure becomes more complicated and failures occur more frequently, which poses maintenance problems.

In addition, as another example, there is a configuration in which a conveyor equipped with a number of scraping plates is driven to rotate within a grinding fluid storage container, and 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 yet be expected.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances,
The purpose of this is to provide a grinding fluid treatment device that can perform more complete sludge collection 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, this invention was made by focusing on the fact that in order to improve the recovery rate of sludge, it is necessary to actively circulate sludge in the area where K is affected by magnetic action. It is. That is, the present invention basically consists of a grinding fluid storage container having a grinding fluid inlet and a grinding fluid outlet, and a grinding fluid flow passage provided within the grinding fluid storage container and formed narrowly. , a magnetic means provided adjacent to at least one of the upper or lower surfaces defining the grinding fluid flow path; and a magnetic means for discharging sludge in the grinding fluid attached to the adjacent corresponding surface from the grinding fluid flow path. For this purpose, a grinding fluid treatment device is provided which is equipped with a sludge discharge means provided in a grinding fluid flow path.

Hereinafter, the present invention will be described in detail 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. The liquid outflow part 5 is the grinding liquid outflow part 4 of the grinding liquid treatment device 1
and a grinding fluid supply pipe connected between the roll grinder 2 and the roll grinder 2;
For example, 6 is in the form of a cooling tower, and is cooled once through the processed grinding liquid sent out from the grinding liquid outflow part 4 and sent to the roll grinding machine 2 on the grinding liquid processing device 1. A cooling device 2 is connected between the roll grinder 2 and the grinding fluid inlet 3 in order to send the grinding fluid used in the roll grinder 2, that is, the waste fluid, to the grinding fluid treatment device 1. This is the grinding fluid recovery pipe. FIG. 1 shows an outline of the grinding fluid supply system constructed as described above.

Note that 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 liquid contains abrasive grains that fell off during grinding work, bonding agent from the grinding wheel,
It also contains sludge that is mixed with processed metal scraps and the like.

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 treatment device 1 includes a grinding fluid storage container 8.
The inside of the grinding fluid storage container 8 includes a first dirty tank 9, a second dirty tank 10, and a clean tank 1.
It is divided into 1.

A partition plate 12.13 is provided for this compartment.

The grinding fluid inflow section 3 is arranged in the first dirty tank 911C, and the grinding fluid outflow section 4 is arranged in the clean tank 11. 1
4 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 11 is a first sludge conveying body constituting the sludge conveying means; It is arranged.

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.

A first sludge carrier 12 and a second sludge.

Each conveyor 18 has an endless chain conveyor 19, 20, and a plurality of scraper plate members 21, 22 connected to each other at predetermined intervals. 23 is a driven shaft equipped with a sedge rocket wheel, which extends commonly to the first sludge carrier 17 and the second sludge carrier 18.

In FIG. 3, the grinding fluid inflow section 3 consists of an inflow pipe 24 and an inlet pipe 26 connected to the lower end thereof and having a baffle plate 25 inside. ing.

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 narrow grinding fluid flow passage 29 between the lower surface 28 and the lower surface 28
A bottom plate 30 is disposed along the bottom of the first dirty tank 9. 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. A scraper plate member 2 located below the first sludge conveyor 17 is configured to move along a bottom plate 30 in the narrow grinding fluid flow path 29 . The direction of movement, ie the direction of sludge transport, 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, the permanent magnets 16 are provided substantially over the entire bottom plate 30.

Reference numeral 31 denotes a communication 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 is connected to the grinding fluid flow path 2.
9 is in communication with the inclined passage 5xyc.

The second sludge carrier 18 is connected to the second dirty tank 10
and along the bottom of the clean tank 11, and the partition plate 1
It passes through a communication hole 33 between the second dirty tank 10 and the clean tank 1 formed at the bottom of the tank 3.

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 section 36, to which a shooter 37 is connected. A sludge collection box 38 is installed below the lower end of the shooter 37, and sludge is discharged into the sludge collection box 38 as shown by the arrow.

Furthermore, depending on the curved configuration of the first sludge conveyor 17,
The bottom plate 30 is also curved, and the permanent magnet 16 extends along its lower surface to the vicinity of the sludge discharge port 39.

The other second sludge conveyor 18 is configured similarly to the first sludge conveyor 17, and the conveyor drive motor 3
5 together.

As shown in FIG. 5, the permanent magnet 16 is composed of a plurality of permanent magnets arranged at intervals, so that the bottom plate 30 is always magnetized and a constant magnetic flux is formed in the grinding fluid flow path 29. is placed in In addition, the permanent magnet 16
may be arranged not only on the lower surface side of the grinding fluid flow path 29 but also on the upper surface side, that is, on the surface 28 side. In this case, the permanent magnet 16 may be provided inside the passage regulating member 15. Also,
It is also possible to arrange only on the surface 28 side.

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

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 is transferred to the first dirty tank 9 through the introduction pipe 26.
First, the sludge enters the drain and is forced to flow into the narrow grinding fluid flow path 29. During this time, the sludge in the waste fluid descends due to gravity and accumulates on the bottom plate 3o, and the magnetic action of the permanent magnet 16 turns the sludge into sludge. The magnetic sludge, especially metal scraps, is attracted to the magnetized surface of the bottom plate 3o. In addition, along with this, the non-magnetic sludge is also surrounded by the magnetic sludge and aggregates on the surface of the bottom plate 30. Therefore, most of the sludge is accumulated in this grinding fluid flow path 29,
The purified waste liquid passes through the inclined passage 32 and enters the second dirty tank 1o through the communication hole 31. In addition, the inclined passage 32
The sludge also slides down into the grinding fluid flow path 29 due to the inclined configuration, so that the sludge is collected in the grinding fluid flow path 29 even more effectively.

The sludge accumulated in the grinding fluid flow path 29 is periodically carried out from the grinding fluid flow path 29 by the scraping plate member 21 of the first sludge conveyor 17, and is discharged into the sludge collection box 38 shown in FIG. It is discharged through the outlet 39 and the shooter 32. These sludge discharge ports 39, shooters
37 is above the rail of the grinding fluid 22 in the grinding fluid storage container 8, so only the sludge is collected in the sludge collection box 381.
1C is discharged. Note that the unloading operation of the first sludge transport body 11 may be adjusted depending on the amount of sludge accumulation, for example, using a timer.

A 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 carrier 18 in the same way as the first sludge carrier 17. Ru. Then, the almost completely purified waste liquid flows into the clean tank 11 through the communication hole 33.
The grinding fluid is sent out as shown by the arrow in FIG. 2 through the grinding fluid outflow pipe 4o of the grinding fluid outflow section 4, and is put to use again.

In the embodiment, a structure in which the dirty tank is divided into two parts is disclosed, but a single tank is also possible, and a surface to which sludge is attached, such as the bottom plate 30 forming the grinding fluid flow path 29, is also possible. Magnetization can improve the adhesion effect, but magnetization is not always necessary, and various changes can be made, such as forming the bottom plate 3o etc. with a non-magnetic material such as Teflon which is highly wear resistant.

〔Effect of the invention〕

As described above, according to the present invention, a narrow grinding liquid flow passage is formed in the grinding liquid storage container, and the grinding liquid is flowed therein, and a magnetic means is disposed in the area. By attaching the sludge to the lower and/or upper surfaces of the liquid flow passages and coagulating and depositing the sludge, the sludge recovery rate is extremely high. Moreover, it is possible to provide a grinding fluid processing device with a simple structure and less trouble. It's large.

[Brief explanation of the drawing]

The drawings show an embodiment of the grinding fluid processing device of the present invention, and FIG. 1 shows an embodiment in which the grinding fluid processing device and a roll grinder forming the supply section are connected by a grinding fluid supply pipe. 2 is a top view of the grinding fluid treatment device, FIG. 3 is a cross-sectional view taken along line I[l-111 in FIG. 2, and FIG. A side sectional view of the main part along the line,
FIG. 5 is an enlarged explanatory view of the main part of FIG. 3. 1... Grinding fluid treatment device, 8... Grinding fluid storage container, 1
5... Passage regulating member, 16... Permanent magnet, 17...
- First sludge conveyor, 21... scraper plate member, 29
...Grinding fluid flow path, 30...Bottom plate. Applicant's agent Patent attorney Suzue Takehiko1i1 Figure 183 Figure 2 Figure rX

Claims (4)

[Claims] (1) A grinding fluid storage container with a grinding fluid inlet and a grinding fluid outflow, a narrow grinding fluid flow path provided in the grinding fluid storage container, and a dividing fluid flow path. magnetic means provided adjacent to at least one of the upper or lower surfaces of the grinding fluid, and a magnetic means provided in the grinding fluid flow path for discharging sludge in the grinding fluid that has adhered to the adjacent corresponding surface from the grinding fluid flow path. 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 is disposed below the lower surface that partitions the grinding fluid flow path. (3) The grinding fluid treatment device according to claim 2, wherein the magnetic means comprises a plurality of permanent magnets. (4) The sludge discharge means comprises a plurality of scraping plate members movable in the grinding fluid flow path, and a conveyor that moves these scraping plate members at predetermined intervals in the grinding fluid flow path. The grinding fluid treatment device according to scope 1.