JP2006043820A - Eddy current circulation type coolant purifying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eddy current circulation type coolant purifying apparatus, improving the purification efficiency in purifying a coolant with eddy current, restraining deposition of sludge in a second coolant tank, and improving work efficiency. <P>SOLUTION: This eddy current circulation type coolant purifying apparatus for circulating and using a coolant includes: a first coolant tank 1 storing a coolant where sludge introduced from a working device K is mixed in an eddy current state; a second coolant tank 2 storing the coolant in the eddy current state outside the first coolant tank 1; a circulating passage for guiding the coolant discharge from a discharge port 1a and introducing the coolant into the second coolant tank 2; and a circulating passage for feeding the coolant having high cleanliness in the vicinity of the inner wall of the second coolant tank 2 into the working device K, wherein the second coolant tank 2 is so constructed that the base 2b is inclined downward at a predetermined angle α toward the central discharge port 1a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vortex circulating coolant purifying apparatus for purifying coolant discharged from a processing apparatus and mixed with sludge and the like by vortex flow and recirculating and using the coolant.

  The coolant discharged from a processing device such as a grinding device is mixed with sludge that has flowed out of the processing base material during processing, and the used coolant is purified to be sent to the processing device again for reuse. There is a need. A circulation-type coolant purification apparatus that performs such purification and circulation is disclosed in, for example, Patent Document 1.

  The conventional circulation-type coolant purification device disclosed in the publication has a cylindrical coolant tank that stores used coolant, and generates vortex in the tank to remove mixed sludge and the like. It is of the vortex circulation type that is accumulated on the bottom bottom of the tank and removed. More specifically, the coolant containing the sludge accumulated on the bottom surface of the tank is pulled up to the upper side of the tank by the pump, and the sludge is adsorbed and removed by the magnet of the magnet type sorter, while the cleanness in the vicinity of the inner wall surface of the tank is removed. The coolant of high degree was configured to be sent again to the processing apparatus by a separate pump.

  However, in the above conventional vortex circulation type coolant purifying apparatus, since there is one tank (tank) for storing the used coolant, it is in the vicinity of the center bottom of the tank and the high cleanliness coolant near the inner wall of the tank. There is a possibility that coolant with a low cleanliness may be mixed and there is a problem that the purification efficiency deteriorates. In view of such circumstances, the present applicant has proposed a vortex circulation type coolant purifier as disclosed in Patent Document 2.

According to such a conventional vortex circulation type coolant purifying apparatus, a coolant having a low cleanliness is accommodated in the first coolant tank and a coolant having a high cleanliness is accommodated in the second coolant tank. It is possible to avoid a mixture of high and low cleanliness and improve purification efficiency. In addition, since the second coolant tank contains a very small amount of sludge, etc., containing a coolant having a high cleanliness, it is communicated with the discharge port of the first coolant tank below the second coolant tank, The coolant was circulated again and purified.
JP 2001-277067 A JP 2003-175437 A

  However, in the conventional vortex circulation type coolant device, the lower center of the second coolant tank communicates with the discharge port of the first coolant tank, and a small amount of sludge that could not be removed during the circulation process is circulated again. Although it is configured to be removed, the bottom surface of the second coolant tank is flat, so that it does not move to the central discharge port side even under the action of the vortex, and there is sludge that accumulates on the bottom surface. It was. For this reason, it was necessary to frequently clean the second coolant tank, and there was a problem that workability deteriorated.

  The present invention has been made in view of such circumstances, and can improve the purification efficiency at the time of purification of the coolant by the vortex, and suppress the accumulation of sludge and the like in the second coolant tank, thereby improving the workability. An object of the present invention is to provide a vortex circulation coolant device that can be made to operate.

  The invention described in claim 1 is a first coolant tank having a substantially circular cross section, containing a coolant guided by a processing apparatus and mixed with sludge and the like in a vortex state and having a discharge port for discharging from a central bottom surface; The first coolant tank has a substantially cylindrical shape that surrounds at least the side and the lower side. The coolant is swirled outside the first coolant tank and communicated with the discharge port of the first coolant tank below. 2 coolant tanks, a coolant passage that guides the coolant discharged from the discharge port, introduces the coolant into the second coolant tank, and a coolant having high cleanliness near the inner wall of the second coolant tank. In the vortex circulation type coolant purifying apparatus for circulating and using the coolant, the second cooler DOO tank is characterized in that its bottom is what inclined to a predetermined angle downward toward the outlet of the center.

  The invention according to claim 2 is the vortex circulation type coolant purifying apparatus according to claim 1, wherein the second coolant tank has an R shape having a predetermined curvature from the inner wall surface to the bottom surface. To do.

  According to the first aspect of the present invention, since the bottom surface of the second coolant tank is inclined downward by a predetermined angle toward the central discharge port, sludge or the like reaching the bottom surface of the second coolant tank is discharged from the discharge port side. It is easy to be drawn into. Accordingly, it is possible to improve the purification efficiency at the time of the purification of the coolant by the vortex, and to suppress the accumulation of sludge and the like in the second coolant tank and to improve the workability.

  According to invention of Claim 2, since it was made into the R shape which had the predetermined curvature from the inner wall surface of the 2nd coolant tank to the bottom face, compared with what has a corner | angular part from the inner wall face to the bottom face like before. In addition, it is possible to suppress the accumulation of sludge and the like at the site and further improve the workability.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The vortex circulation type coolant purifying apparatus according to the present embodiment purifies the coolant mixed with sludge and the like discharged from the processing apparatus (grinding apparatus) and flowing out from the metal processing base material with the eddy current, and sends it again to the processing apparatus. As shown in FIG. 1, the first coolant tank 1, the second coolant tank 2, the tornado purification device 4, the separation tank 5, and the flow path L1 are used. , Mainly composed of the circulation path L2.

  The first coolant tank 1 has a discharge port 1a that introduces the coolant guided from the processing device K via the magnet type sorting device 3, accommodates it in a vortex state, and discharges it from the center bottom surface. As shown in FIG. 4, the cross-section whose inner diameter is reduced from the upper end to the lower end is a substantially circular (funnel-shaped) tank. By generating a vortex in the first coolant tank 1, the mixed sludge and the like can be efficiently accumulated on the bottom surface of the center, and the coolant containing a large amount of such sludge can be smoothly discharged from the discharge port 1a. .

  In FIG. 1, a flow path for guiding the used coolant from the processing device K to the magnetic sorting device 3 is denoted by L3, and a flow path for guiding the coolant from which iron has been removed by the magnetic sorting device 3 to the first coolant tank 1 is denoted by L4. It is. The flow path (including other flow paths) is mainly composed of a flexible tube, but may be a flow path formed of other materials.

  Further, as shown in FIG. 2, the coolant introduction port a at the tip of the flow path L4 is disposed in the tangential direction in the first coolant tank 1, so that the introduced coolant is likely to generate vortex. It is configured. Thus, if the coolant is introduced into the first coolant tank 1, a vortex flow is naturally generated, so that a separate drive pump or the like is unnecessary, and the manufacturing cost and running cost can be reduced.

  The magnet type sorting device 3 contains the coolant discharged from the processing device K and removes iron in the coolant with a magnet. As shown in FIG. 5, a tank 3a containing the coolant, and a drive A roller magnet M that can be rotated by the roller R, a scraper 3c that scrapes off the iron adsorbed on the roller magnet M, a storage box 3d that stores the iron scraped off by the scraper 3c, and a tank 3a. And the partition plate 3b for guiding the coolant to be stored to the roller type magnet M.

  Thereby, the iron content contained in the coolant introduced from the flow path L3 (or the flow path L6 or 8) can be adsorbed and removed by the roller type magnet M, and the first coolant is removed from the flow path L4 after the iron content is removed. Since it can introduce | transduce into the tank 1, with respect to the coolant introduce | transduced into the said 1st coolant tank 1, a cleanliness can be raised to some extent or a series of subsequent purification | cleaning actions can be performed smoothly.

  The second coolant tank 2 has a cylindrical shape that surrounds the side and the lower side of the first coolant tank 1. The second coolant tank 2 accommodates the coolant in a vortex state outside the first coolant tank 1, and has a central bottom surface (downward). One coolant tank communicates with the discharge port 1a. In other words, since the inlet b in the coolant flow path L5 extending from the tornado type purification device 4 is disposed in the tangential direction in the second coolant tank, the first coolant is also provided in the second coolant tank 2. A vortex similar to the tank 1 can be generated.

  Due to the vortex flow in the second coolant tank 2, mixed sludge and the like can be accumulated on the center bottom surface, and only the coolant containing a large amount of sludge can be discharged from the discharge port 1 a. That is, the coolant having a low cleanliness accumulated in both the first coolant tank 1 and the second coolant tank 2 is discharged from the discharge port 1a.

  Moreover, the 2nd coolant tank 2 which concerns on this embodiment is comprised so that the bottom face 2b may incline below the predetermined angle (alpha) toward the center discharge outlet 1a, as shown in FIG.1, FIG3 and FIG.4. And an R shape 2d having a predetermined curvature from the inner wall surface 2c to the bottom surface 2b. That is, the inner peripheral shape of the second coolant tank 2 continuously connects the inner wall surface 2c erected in the vertical direction, the bottom surface 2b inclined at an angle α toward the center, and the inner wall surface 2c and the bottom surface 2b. And an R shape 2c having a predetermined curvature. The inclination angle α of the bottom surface 2b is preferably designed to be about 10 degrees or less.

  The flow passages (L 1, L 7 and L 5) are flow paths for guiding the coolant discharged from the discharge port 1 a and introducing the coolant into the second coolant tank 2 via the tornado purification device 4. For convenience, the flow path from the discharge port 1a to the branch point W of the flow path L7 and the flow path L8 is the flow path L1, and the flow path from the branch point W to the tornado purification device 4 is the flow path L7, the tornado purification device. A flow path from 4 to the second coolant tank 2 is defined as L5.

  The coolant in the flow path L1 is sucked up by the pump P1, and a part thereof reaches the tornado type purification device 4 through the flow path L7, and the other reaches the magnet type sorting device 3 through the flow path L8. Yes. That is, the flow path is branched between the discharge port 1a and the tornado purification device 4, and the tip of the branched flow path L8 is arranged in the magnet type sorting device 3. With such a configuration, a part of the coolant having a low cleanliness discharged from the discharge port 1a can be sent again to the magnet type sorting device 3, and further iron content removal can be performed, and reliable purification can be performed.

  The flow path L8 is provided with a flow rate adjusting valve V1 so that the flow rate of the coolant flowing through the flow path L8 can be adjusted. As a result, for example, when the processing device K is not in operation, the coolant is not sent from the flow path L3 to the magnet type sorting device 3, and there is a margin in processing capacity. Therefore, the flow rate adjusting valve V1 is operated for processing. More coolant than that during operation of the device K can be sent from the flow path L8 to the magnet type sorting device 3 to perform the iron removal processing, and the purification processing efficiency can be further improved.

  The circulation path L <b> 2 includes a flow path extending from the opening 2 a formed in a part of the wall surface of the second coolant tank 2 through the pump 2 to the processing device K, and the cleanliness in the vicinity of the inner wall of the second coolant tank 2 The high coolant is sent to the processing apparatus K. Here, since the opening 2a is formed on the wall surface of a predetermined height from the bottom surface of the second coolant tank 2, among the coolant accommodated in the second coolant tank 2, the oil component floating on the upper surface side and the bottom surface Only foreign material such as precipitated iron (sludge) can be avoided and only coolant with extremely high cleanliness can be sent to the processing apparatus K. Note that a valve V2 is provided in the circulation path L2, and is configured to be opened when being processed by the processing machine K and closed when not being processed.

  The tornado type purification device 4 introduces the coolant flowing through the flow passage L7 while generating a vortex, and guides the upper clean coolant to the second coolant tank 2 through the flow passage L5, while discharging it from below. The coolant having a low cleanliness is guided to the magnet type sorting device 3 through the separation tank 5 and the flow path L6. As shown in FIG. 6, the tornado type purification device 4 is formed of a substantially cylindrical member having a reduced diameter portion below, and an accommodation space 4 a that accommodates the coolant guided from the flow path L <b> 7 while generating a vortex. In addition, a discharge port 4b communicating with the storage space 4a is formed below.

  Here, since the connection port (coolant introduction port) of the flow passage L7 is directed in the tangential direction in the accommodation space 4a (offset with respect to the central axis), the introduced coolant naturally vortexes. It is configured to occur. Due to this vortex flow, a low-cleanness coolant including sludge and the like is discharged from the lower discharge port 4b, and a high-cleanness coolant passes through the flow passage L5 from the connection port (coolant outlet port) with the upper flow passage L5. Then, it is guided to the second coolant tank 2.

  The separation tank 5 stores low-cleanness coolant discharged from the discharge port 4b of the tornado-type purification device, precipitates sludge at the lower position while floating the oil in the upper position, and magnetically sorts the coolant at the intermediate position. It leads to the device 3. As shown in FIG. 7, this separation tank is composed of a tank 5a capable of containing a coolant, and the inside of the separation tank 5 is divided into storage spaces S1 and S2 by a partition plate 5b, while the partition plate 5b. An opening 5ba is formed in a part of the coolant, and only the coolant in the middle of the coolant in the height direction among the coolant introduced into the housing space S1 can flow into the housing space S2.

  Therefore, only coolant with a high cleanliness other than the oil component floating in the storage space S1 and the precipitated iron content (sludge) reaches the storage space S2, and further purification can be performed. In addition, the wall surface facing the partition plate 5b in the tank 5a is an inclined surface 5aa as shown in the figure, and it is easy to scrape iron such as sludge deposited on the bottom surface by the scraper T or the like.

Next, the operation of purifying the coolant according to the above configuration will be described.
The used coolant used in the processing device K is sent to the magnet type sorting device 3 through the flow path L3, where the iron component is removed by the roller magnet M, and then the first coolant is passed through the flow path L4. It is introduced into the tank 1. Since a vortex is generated in the first coolant tank 1, a low-cleanness coolant including sludge and the like is efficiently discharged from the discharge port 1a on the center bottom surface. Further, the coolant in the first coolant tank 1 can be efficiently discharged from the discharge port 1a by the swirl of the first coolant tank 1, and the coolant having a low cleanliness in the second coolant tank 2 is drawn into the discharge port 1a. Can do.

  The coolant discharged from the discharge port 1a is sucked up by the pump P1 through the flow path L1, and is branched into the flow path L7 and the flow path L8. The coolant flowing through the flow path L8 returns to the magnet type sorting device 3, and the iron content is removed again by the roller type magnet M to reach the first coolant tank 1. On the other hand, the coolant flowing through the flow path L7 reaches the tornado type purification device 4, and the low cleanliness is discharged from the discharge port 4b by the action of the internal vortex and is stored in the storage space S1 of the separation tank 5 and clean. A high degree returns to the magnet type sorting device 3 through the flow path L5, and the iron content is removed again by the roller type magnet M. However, the magnet type sorting device 3 can remove any iron content of the coolant discharged from the processing device K and the coolant led out from the separation tank 5, and serves as both cleaning means.

  In addition, the coolant introduced into the second coolant tank 2 is accumulated in the bottom surface of the center including the sludge and the like due to the vortex and is discharged from the discharge port 1a in the same manner as the first coolant tank 1. While the purification action is performed, only the high cleanliness coolant in the vicinity of the inner wall flows out from the opening 2a to the circulation path L2, and is sent to the processing apparatus K by the pump P2. Thereby, the coolant discharged from the processing device K can be purified and sent again to the processing device K, and the coolant can be circulated and used.

  Here, in the present embodiment, since the bottom surface 2b of the second coolant tank 2 is inclined downward by a predetermined angle α toward the central discharge port 1a, sludge or the like that has settled on the bottom surface 2b acts on the eddy current action. In addition, due to the action of gravity, the discharge port 1a is smoothly reached, and accumulation of the sludge can be suppressed. Accordingly, it is possible to reduce the frequency of cleaning and the like, improve the working efficiency, and avoid the sludge and the like accumulated on the bottom surface 2b from floating to the opening 2a and being guided to the processing apparatus K. it can.

  Further, in the present embodiment, since the R shape 2d is built from the inner wall surface 2c to the bottom surface 2b of the second coolant tank 2, the sludge in the portion is compared with a conventional corner portion. Etc. can be suppressed. That is, sludge or the like is slid to the bottom surface 2b side in the R shape 2d, and can be efficiently moved to the central discharge port 1a by the inclination of the bottom surface 2b.

  In addition, according to the present embodiment, the high cleanliness coolant is separated into the second coolant tank 2 and the low cleanliness coolant is separated into the first coolant tank 1 to be purified. Can be avoided during purification, and purification efficiency can be improved.

  As mentioned above, although this embodiment was described, this invention is not limited to this, For example, if the bottom face 2b of the 2nd coolant tank 2 inclines below the predetermined angle toward the center discharge outlet 1a, for example. It may be sufficient that the R shape 2d is not built between the inner wall surface 2c (the corner portion is formed). Further, in this embodiment, the coolant cleaned in the separation tank 5 is guided to the magnet type sorting device 3, but a magnet type sorting device 3 having the same configuration is separately provided to remove iron. You may make it perform.

  Furthermore, it can replace with purification | cleaning means, such as the magnet type | formula sorter 3, the tornado type | formula purification | cleaning apparatus 4, and the separation tank 5, It can be set as another general purpose purification | cleaning means, These combinations can also be used variously. That is, any one of the magnet-type sorting device 3, the tornado-type purification device 4 and the separation tank 5 can be omitted or disposed at another position.

  Further, in the present embodiment, the present invention is applied to purify the coolant used in the grinding device, but the coolant used in other processing devices (for example, a cutting device) in which sludge or the like is generated during processing is purified. It may be configured. In the present embodiment, the flow path 1 is branched and divided into the flow path L8 and the flow path L7 in order to ensure the purification, but only the flow path L7 without branching (that is, the flow path). L8 may be abolished).

  As long as the bottom surface of the second coolant tank is a vortex circulation type coolant device inclined downward by a predetermined angle toward the central discharge port, it can be applied to a device having a different external shape or having other functions added. it can.

FIG. 1 is an overall schematic diagram showing a vortex circulation type coolant purifying apparatus according to an embodiment of the present invention. The top view which shows the 1st coolant tank and the 2nd coolant tank in the vortex circulation type coolant purification apparatus which concerns on embodiment of this invention. III-III cross-sectional schematic diagram in FIG. IV-IV sectional schematic view in FIG. 1 is a schematic cross-sectional view showing a magnet type sorting device in a vortex circulation type coolant purifying device according to an embodiment of the present invention. The top view which shows the tornado type purification apparatus in the eddy current circulation type | formula coolant purification apparatus which concerns on embodiment of this invention, and the front view partly broken The cross-sectional schematic diagram which shows the separation tank in the eddy current circulation type | formula coolant purification apparatus which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st coolant tank 2 ... 2nd coolant tank 2a ... Opening 2b ... Bottom 2c ... Inner wall surface 2d ... R shape 3 ... Magnet type | mold sorting apparatus 4 ... Tornado type | formula purification apparatus 5 ... Separation tank L1, L5, L7 ... Flow path L2 ... circulation path L2-L4, L6, L8 ... flow path K ... processing device (grinding device)
V1, V2 ... Valve P1, P2 ... Pump

Claims (2)

A first coolant tank having a substantially circular shape in cross section, containing the coolant introduced by the processing apparatus and mixed with sludge and the like in a vortex state and having a discharge port for discharging from the center bottom surface;
The first coolant tank has a substantially cylindrical shape that surrounds at least the side and the lower side. The coolant is swirled outside the first coolant tank and communicated with the discharge port of the first coolant tank below. 2 coolant tanks,
A flow path for guiding the coolant discharged from the discharge port and introducing the coolant into the second coolant tank;
A circulation path for feeding a high-cleanness coolant in the vicinity of the inner wall of the second coolant tank to the processing device;
In a vortex circulation type coolant purifying apparatus for circulating and using coolant,
The second coolant tank is a vortex circulation type coolant purifying device characterized in that the bottom surface of the second coolant tank is inclined downward by a predetermined angle toward the central discharge port.   2. The vortex circulation type coolant purifier according to claim 1, wherein the second coolant tank has an R shape having a predetermined curvature from an inner wall surface to a bottom surface thereof.

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