KR100773049B1 - Method and device for removing magnetic foreign objects from liquid - Google Patents

Abstract

When the liquid is supplied into the cylinder from below, the liquid stays in the cylinder, and the magnetic foreign matter adheres to the magnetic sphere. The cleaning liquid is discharged from the lower opening of the cylinder together with the cleaning liquid only by supplying the cleaning liquid from the upper side into the cylinder. The magnetic foreign matter in the cleaning liquid falls on the outer circumferential surface of the non-side charity from the cleaning liquid at this position.

Cylinder, transfer member, non-member, excitation coil

Description

METHOD AND DEVICE FOR REMOVING MAGNETIC FOREIGN OBJECTS FROM LIQUID}

The present invention relates to a method and a device for removing magnetic foreign matter from a liquid, and in particular, to a method for removing a magnetic foreign material from a liquid using a magnetized magnetic material and a method for removing the magnetic foreign material from a liquid.

Conventionally, patent document 1 is known as a removal method of the magnetic foreign material from a liquid.

According to the removal method of patent document 1, first, many magnetic spheres are filled in the cylinder by which the excitation coil was wound on the outer peripheral surface. Subsequently, waste oil or the like of the metalworking machine is supplied into the cylinder from the upper opening, and then the energizing coil is energized to magnetize the magnetic sphere. Thereby, magnetic foreign materials, such as cutting chips contained in waste oil etc., are adsorb | sucked to a magnetic sphere.

If the supply of the waste oil or the like is continued for a predetermined period, the adhesion amount of the magnetic foreign matter to the magnetic sphere becomes excessive, and the adsorption efficiency of the magnetic sphere to the magnetic foreign matter decreases. In this case, supply of oil etc. is once stopped, air is supplied from the upper opening part of a cylinder, and waste oil etc. in a cylinder are discharged | emitted from a lower opening part.

Subsequently, the energization to the exciting coil is interrupted and the element is discharged, and a cleaning liquid (organic solvent) is supplied from the lower opening of the cylinder. At this time, the stirring rod previously inserted in the cylinder is vibrated. As a result, while the magnetic foreign matter adhering to the magnetic body is shaken off by vibration, it is discharged from the upper opening of the cylinder by the cleaning liquid.

Patent Document 1: Japanese Patent Laid-Open No. 5-212310

However, the method of removing the magnetic foreign material from the liquid of patent document 1 had the following problems.

(1) Waste oil and the like were supplied into the cylinder from the upper opening portion. Therefore, the residence time of waste oil etc. in the cylinder containing a magnetic sphere was too short. As a result, the magnetic foreign material mixed in the waste oil etc. was discharged through the opening part of the lower side of a cylinder, without being fully fixed to the magnetized magnetic sphere.

(2) In addition, since waste oil or the like was supplied from the upper opening into the cylinder, magnetic foreign substances in the tablets adhere to the magnetic sphere existing in the upper portion of the cylinder. Therefore, when the magnetic sphere is demagnetized and washed, a large amount of magnetic foreign matter adhering to the magnetic sphere on the upper part of the cylinder is dropped by its own weight by the cleaning liquid supplied from the lower opening. As a result, magnetic foreign substances were dispersed throughout the entire cylinder, and the cleaning efficiency was lowered.

(3) In addition, in the conventionally used cleaning liquid, only magnetic foreign substances were adsorbed and recovered from the cleaning liquid by a drum type magnetic separator. Specifically, the lower part of the cylindrical drum is used as the magnetic separator disposed below the liquid level of the storage tank of the used cleaning liquid, and the magnetic separator is used to adsorb magnetic foreign substances to the outer peripheral surface of the cylindrical drum by magnetic force, and then to the scraper. The magnetic foreign substance was scratched and dropped from the outer peripheral surface of the cylindrical drum.

However, since the lower part of the cylindrical drum was immersed in the used washing liquid, a large amount of the washing liquid was scratched and dropped by the scraper together with the magnetic foreign substance. As a result, the recovery amount of the washing liquid was reduced, and the waste amount was increasing.

Therefore, the present invention can improve the removal efficiency of magnetic foreign matter mixed in the liquid by increasing the residence time of the liquid in the cylinder, and also increase the cleaning efficiency of the magnetic body, and further increase the recovery amount of the cleaning liquid. And it aims at providing the removal method of a magnetic foreign material from the liquid which can aim at reduction of a waste amount simultaneously, and its apparatus.

Moreover, an object of this invention is to provide the method and apparatus for removing magnetic foreign materials from a liquid which can shorten the discharge time of the liquid from a cylinder and the cleaning liquid after washing | cleaning. Further, an object of the present invention is to provide a method and apparatus for removing magnetic foreign matter from a liquid that can effectively remove magnetic foreign matter adhering to a magnetic substance.

The invention according to claim 1 has an upper opening portion formed at an upper end, a lower opening portion formed at a lower end thereof, and an energizing step of energizing an excitation coil provided on an outer circumference of a cylinder in which a plurality of magnetic bodies are housed, and exciting the magnetic body; A magnetization step of supplying a liquid in which magnetic foreign matter is mixed into the cylinder from the lower opening at the same time as or after the excitation, and magnetically adhering the magnetic foreign material to the excited magnetic body; A drainage step of stopping the supply of the liquid after self-fixing and discharging the liquid in the cylinder from the lower opening; A washing step of decanting the magnetic body after draining, supplying a cleaning liquid into the cylinder from the upper opening to wash away the magnetic foreign matter adhering to the magnetic body, and discharging the cleaning liquid after the cleaning from the lower opening; An adsorption transfer step of adsorbing magnetic foreign matter contained in the cleaning liquid on the outer peripheral surface of the transfer member by the magnetic force from the cleaning liquid after cleaning; When the magnetic foreign matter reaches the position where the magnetic foreign material approaches the outer circumferential surface of the non-bearing member and is transferred by the conveying member, the magnetic foreign material is attracted to the outer circumferential surface of the non-bearing member by magnetic gradient between the conveying member and the non-bearing member. B this process; And a magnetic foreign material removal method from the liquid having a separation step of transferring the magnetic foreign material to the disengaged position by the non-bearing member, and detaching the magnetic foreign material from the outer peripheral surface of the non-bearing member.

According to invention of Claim 1, each magnetic body in a cylinder is excited by an exciting coil, and it maintains this state, and supplies the liquid which magnetic foreign material mixed in the cylinder from the lower opening part. As a result, the residence time of the liquid in the cylinder is longer than in the case of supplying the liquid from the conventional upper opening. As a result, the amount of magnetic foreign matter in the liquid adheres to the respective magnetic bodies also increases, and the removal efficiency of the magnetic bodies is increased.

At the time of washing | cleaning, supply of a liquid is stopped and the liquid in a cylinder is discharged | emitted from the lower opening part. After that, the energization of the excitation coil is stopped to demagnetize the magnetic material. In this state, the washing liquid is supplied from the upper opening to the cylinder, and the magnetic foreign matter adhering to the magnetic body is washed out from the lower opening.

In this way, since the liquid is supplied from the lower opening, the liquid stays in the cylinder for a long time as described above. Therefore, there is no fear that the magnetic foreign material is biased to the magnetic substance present in the upper part of the cylinder and adsorbed. Therefore, magnetic foreign substances can be fixed to all the magnetic bodies in the cylinder almost uniformly. As a result, the treated foreign matter is discharged from the lower opening with excellent cleaning liquid by simply supplying the cleaning liquid from the upper opening into the cylinder. At this time, the magnetic weight of the magnetic foreign material contributes to the discharge of the magnetic foreign material as opposed to the conventional one. From the above, the cleaning efficiency of the magnetic body can be improved.

After cleaning, the magnetic foreign matter contained in the used cleaning liquid is adsorbed to the outer peripheral surface of the transfer member by magnetic force. Thereafter, the magnetic foreign matter reaches the vial position by the conveying member, and the magnetic foreign substance is adsorbed on the outer circumferential surface of the vial member by the magnetic gradient between the conveying member and the vial member from the cleaning liquid after washing. In other words, the cleaning liquid remains on the outer circumferential surface of the transfer member, and only the magnetic foreign matter having a small adhesion amount of the cleaning liquid adheres to the outer circumferential surface of the non-member. As a result, the amount of the recovery liquid is later recovered from the transfer member, thereby increasing the amount of recovery thereof. In addition, in the detachment process, the magnetic foreign substances with a large amount of cleaning liquid are not discarded as in the prior art, but the magnetic wastes with less adhesion amount of the cleaning liquid are discarded. In this way, it is possible to simultaneously increase the recovery amount of the cleaning liquid and reduce the waste amount.

The material and size of the body are not limited. However, since the excitation coil is provided in the outer periphery of a cylindrical material, nonmagnetic materials, such as stainless steel and aluminum, are preferable.

The shape of the cylinder is not limited as long as the openings are formed at the upper and lower ends of the cylinder, respectively. For example, a circular, elliptical, polygonal polygon more than a triangle etc. are mentioned in plan view.

As the material of the magnetic body, for example, iron, nickel, cobalt and alloys thereof can be employed.

In addition, the shape of a magnetic body is not limited. For example, a spherical, tetrahedron or more polyhedron etc. are mentioned. If the magnetic body is spherical, the diameter is not limited. Although it changes also with the kind of liquid processed, it is 3.2-32 mm, for example. The magnetic body may be tightly filled in the cylinder, or may be stored roughly so that a constant gap is formed. The area in the cylinder in which the magnetic body is housed is an area that constitutes a magnetic circuit.

As the liquid to be treated, for example, water, water emulsified with oil (rolled oil), water containing sodium hydroxide, oil (including waste oil from a metal processing machine), and the like can be employed. The discharge in the treated liquid cylinder can be performed, for example, from the upper opening. In addition, a discharge pipe may be provided at an upper portion or an intermediate portion of the cylinder and discharged therefrom. In addition, the supply of the liquid into the cylinder may be stopped once, and discharged from the lower opening portion may be discharged as in the discharge type.

Examples of the magnetic foreign matter mixed in the liquid include cutting chips discharged from the metalworking machine. As a raw material, the same thing as the raw material of the said magnetic body is mentioned.

As a washing | cleaning liquid, petroleum-type washing oils, such as 2nd petroleum and 3rd petroleum, organic solvents, such as alcohol, an alkaline solution, or the liquid mixture of at least one of these, and warm water, etc. are mentioned, for example. For example, when the magnetic body is washed with the organic solvent cleaning liquid, the organic solvent dissolves the oil adhered to the magnetic body, and the removal rate of the magnetic foreign substance adhering to the magnetic body is increased.

The cleaning liquid may be sucked into the cylinder together with the compressed air. As a result, the cleaning liquid penetrates without leaving a gap between the plurality of magnetic bodies stored in the cylinder, and the cleaning effect of the magnetic bodies is further enhanced. The pressure of the compressed air is preferably 0.5 kg / cm 2 or more.

The washed liquid may be reused by separating the mixed magnetic foreign matter and extracting only the liquid component.

The transfer of the magnetic foreign material by the conveying member and the non-bearing member may be achieved by rotating the conveying member and the non-bearing member, moving linearly, or moving curvedly.

The means for adsorbing magnetic foreign substances by the magnetic force on the outer circumferential surface of the transfer member and the outer circumferential surface of the beam member is not limited. For example, a roller type magnetic separator and a drum type magnetic separator can be employed. In addition, various magnet conveyors can be used. The roller-type magnetic separator is provided with a rotating drum which rotates about a rotating shaft, and a fixed keyboard having a substantially C-shaped cross-sectional shape accommodated in the rotating drum and orthogonal to the axis line of the rotating drum. The conveying member in the drum type magnetic separator is a rotating drum. As a magnet used for magnetic separation, a permanent magnet can be adopted. The magnetic flux density of the N pole surface and the S pole surface of the magnet is, for example, 1000 G (0.1 tesla) or more.

Invention of Claim 2 remove | eliminates a magnetic foreign material from the liquid of Claim 1 which performs discharge | release of the liquid in the said cylinder in the said liquid discharge process, and discharge | release of the washing | cleaning liquid after the washing | cleaning in the said washing | cleaning process by the compressed air supplied in the said cylinder. Way.

According to invention of Claim 2, discharge of the liquid in a drainage process and discharge of the washing | cleaning liquid after the washing | cleaning in a washing | cleaning process are forcibly performed by supplying compressed air into a cylinder (air blow), respectively. Thereby, the discharge time of the liquid from a cylinder and the washing | cleaning liquid after washing | cleaning can be shortened.

The supply amount of compressed air is 0.3 kg / cm <2> or more, Preferably it is 0.5-3.Okg / cm <2>. If it is less than 0.3 kg / cm <2>, the discharge time of the liquid from a cylinder and the discharge time of the washing | cleaning liquid after washing | cleaning will become long.

The invention according to claim 3 is a method for removing magnetic foreign matter from the liquid according to claim 1 or 2, wherein in the cleaning step, the magnetic foreign matter stuck to each magnetic body is washed while vibrating the cylinder.

According to invention of Claim 3, in a washing | cleaning process, each magnetic body is wash | cleaned, vibrating according to the vibration of a cylinder. Thereby, the magnetic foreign material adhering to the magnetic body can be removed effectively.

The method of vibrating a cylinder is not limited. For example, a vibrator may be provided in the cylinder. In addition, a method called ultrasonic vibration can also be employed.

The invention according to claim 4 has an upper opening formed at an upper end thereof, and a cylinder having a lower opening formed at a lower end thereof; A plurality of magnetic bodies housed in the cylinder; An excitation coil provided on an outer circumference of the cylinder to excite a magnetic body in the cylinder; Liquid supply means for supplying a liquid in which magnetic foreign matter is mixed into the cylinder from the lower opening; Processing liquid discharge means for discharging the processed liquid from which the magnetic foreign substance adheres to the magnetic body by excitation by the excitation coil from the cylinder; Liquid discharge means for discharging the liquid in the cylinder from the lower opening; Cleaning liquid supply means for supplying a cleaning liquid from the upper opening in the cylinder; A transfer member capable of adsorbing magnetic foreign matter contained in the cleaning liquid after cleaning at its outer circumferential surface by magnetic force at the magnetic sorting position to which the cleaning liquid after washing is supplied, and transferring the adsorbed magnetic foreign material from the magnetic sorting position to the non-bearing position; And a non-magnetic member, which is attracted to and adsorbed from the outer circumferential surface of the transfer member to the outer circumferential surface by magnetic gradient between the transfer member when the magnetic foreign substance reaches the non-translated position by the transfer member: The non-magnetic member is a magnetic foreign material removal device from a liquid which can dislodge magnetic foreign matter adsorbed on its outer circumferential surface from the adsorption position to a disengagement position different from this, and can be detached from the outer circumferential surface.

According to invention of Claim 4, each magnetic body in a cylinder is excited by an excitation coil, and a liquid is supplied to a cylinder from a lower opening part by a liquid supply means as it is in this state. Thereby, the residence time of the liquid in a cylinder becomes long, and the removal efficiency of the magnetic foreign material in a liquid becomes high. The treated liquid in which the magnetic foreign matter adheres to the magnetic body and is removed is discharged by the treatment liquid discharge means.

At the time of washing | cleaning, supply of a liquid is stopped and a magnetic element is simultaneously demagnetized. The liquid in the cylinder is discharged before the element (during excitation) from the lower opening by the liquid discharge means. Next, a washing | cleaning liquid is supplied in a cylinder from the upper opening part, and the magnetic foreign material adhering to a magnetic body is wash | cleaned. After use (after cleaning), the cleaning liquid is discharged from the lower opening to the outside of the cylinder.

In this way, the liquid stays in the cylinder for a long time as compared with the conventional one by being supplied from the lower opening. Therefore, the magnetic foreign material can be attached almost uniformly to all the magnetic bodies in a cylinder. Thereafter, after the magnetic body is demagnetized, the cleaning liquid is supplied into the cylinder from the upper opening, and the treated magnetic foreign matter is discharged from the lower opening with excellent cleaning liquid with excellent efficiency. As a result, the cleaning efficiency of the magnetic body can be improved.

In addition, magnetic foreign matter contained in the cleaning liquid after cleaning is attracted to the outer peripheral surface of the transfer member by the magnetic force at the magnetic force sorting position. Thereafter, the magnetic foreign material is transferred from the magnetic force sorting position to the non-magnetic position by the transfer member. Therefore, magnetic foreign matter is absorbed and adsorbed on the outer circumferential surface of the vial member in the cleaning liquid attached to the outer circumferential surface of the transfer member by the magnetic gradient between the transfer member and the vial member. In other words, the cleaning liquid remains on the outer circumferential surface of the transfer member, and only the magnetic foreign matter having a small adhesion amount of the cleaning liquid adheres to the outer circumferential surface of the non-member. Thereby, the washing | cleaning liquid is collect | recovered from a conveyance member later, and the collection | recovery quantity increases compared with the past. In addition, in the detachment step, the magnetic foreign substances with a large amount of the cleaning liquid are not discarded as in the prior art, but the magnetic wastes with the small amount of the adhesion of the cleaning liquid are discarded, so that the waste amount of the waste can be reduced. In this way, it is possible to simultaneously increase the recovery amount of the cleaning liquid and reduce the waste amount (waste amount) of the waste.

As the liquid supply means, for example, various pumps such as a vortex pump, a diffuser pump, a volute pump, a reciprocating pump, and a vane pump can be adopted.

As the treatment liquid discharge means, for example, a discharge pipe of the treated liquid communicated with the upper end portion of the cylinder can be adopted.

As the liquid discharging means, for example, a discharge tube of liquid communicated with the lower end portion of the cylinder can be employed.

As the cleaning liquid supply means, a pump or the like similar to the liquid supply means can be used.

The invention according to claim 5, wherein the discharge of the liquid in the cylinder and the removal of the cleaning liquid after the cleaning from the cylinder are performed by the removal of the magnetic foreign matter from the liquid according to claim 4 by the compressed air supplied into the cylinder from the compressed air generating means. Device.

According to invention of Claim 5, discharge of the liquid in a cylinder and discharge of the washing | cleaning liquid after the washing in a cylinder are forcibly performed by supplying the compressed air which generate | occur | produced by the compressed air generation means in a cylinder, respectively. Thereby, the discharge time of the liquid from a cylinder and the washing | cleaning liquid after washing | cleaning can be shortened.

As the compressed air generating means, for example, a compressor or the like can be adopted.

Invention of Claim 6 is a magnetic foreign material removal apparatus from the liquid of Claim 4 or 5 in which the said cylinder was provided with the vibration means which vibrates a cylinder at the time of washing each magnetic body.

According to the invention as set forth in claim 6, each magnetic body is cleaned while vibrating each magnetic body in accordance with the vibration of the cylinder at the time of washing each magnetic body. Thereby, the magnetic foreign material adhering to the magnetic body can be removed effectively.

As a vibrating means, a vibrator, an ultrasonic wave generator, etc. can be used, for example.

In the invention according to claim 7, the transfer member and the non-member include a non-magnetic cylindrical drum in which magnetic foreign materials are placed on an outer circumferential surface, rotation means for rotating the cylindrical drum in a circumferential direction, and the magnetic force in the inner space of the cylindrical drum. Permanent magnets each having a fixed position in the circumferential direction of the cylindrical drum are fixed to portions facing the sorting position, and a magnetic force acting on the outer circumferential surface of the cylindrical drum of the beam member acts on the outer circumferential surface of the cylindrical drum of the transfer member. It is a magnetic foreign material removal apparatus from the liquid as described in any one of Claims 4-6 which is larger than a magnetic force.

According to the invention of claim 7, the magnetic foreign matter contained in the cleaning liquid after cleaning is attracted to the cylindrical drum outer circumferential surface of the transfer member by magnetic force. Thereafter, the magnetic foreign material is transferred from the magnetic force sorting position to the non-magnetic position by the cylindrical drum of the conveying member. Therefore, magnetic foreign matter is attracted to the outer circumferential surface of the cylindrical drum of the beam member and is adsorbed in the cleaning liquid attached to the outer circumferential surface of the cylindrical drum of the transport member by the magnetic gradient between the transport member and the beam member.

The cylindrical drum material is not limited as long as it is nonmagnetic. For example, austenitic stainless steel or the like can be used.

The rotational speed of the cylindrical drum depends on the magnitude of the magnetic force on the object to be discriminated on the outer circumferential surface of the cylindrical drum. For example, when the adjustment range of the magnetic force is set to 3000 to 5000 G, the drum rotation speed is at most 100 m / min. If it exceeds 10m / min, in the case of austenitic stainless steel, heat generation due to overcurrent loss and increase in electric motor capacity due to overcurrent resistance loss may occur.

The scraper which scratches and falls down the magnetic substance after magnetic screening may be contacted downstream from the magnetic force sorting position among the outer peripheral surfaces of a cylindrical drum.

As a material of a permanent magnet, neodymium, a rare earth metal such as samarium, etc. can be employ | adopted, for example.

The magnetic flux densities of the N pole surface and the S pole surface of the permanent magnet are, for example, 1000 (0.1 tesla) to 5000 G (0.5 tesla). If it is less than 1000G, adsorption power is insufficient.

The permanent magnet may be disposed at least in the inner space of the cylindrical drum opposite to the magnetic force sorting position. For example, in the transfer path of the object to be selected on the outer circumferential surface of the cylindrical drum, the permanent magnet may be disposed in the entire range from the dropping position of the object to the magnetic force sorting position (or slightly downstream thereof).

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the removal apparatus of the magnetic foreign material from the liquid by Example 1 of this invention.

It is a partial sectional drawing of the periphery of the apparatus cylinder | substrate removal apparatus of the magnetic foreign material from the liquid by Example 1 of this invention.

3 is an enlarged side view including a partial cross-sectional view of the conveying member and the vial member according to the first embodiment of the present invention.

4 is an enlarged cross sectional view of a BUI member according to Embodiment 1 of the present invention.

5 is an enlarged longitudinal sectional view of a BBI member according to Embodiment 1 of the present invention.

6 is an explanatory diagram showing the magnetic flux density between the transfer member and the non-member in accordance with the first embodiment of the present invention.

[Description of the code]

10: magnetic foreign material removal device from the liquid

11: body

12: magnetic sphere

13: gal coil

14: slurry pump (liquid supply means)

16: feed pump (cleaning liquid supply means)

17: vibrator (vibration means)

27: waste oil discharge pipe (liquid discharge means)

41: charity at transfer side (transport member)

42: non-side charity (non-member)

45: first cylindrical drum

48: 2nd cylindrical drum

50: motor (rotating means)

52: permanent magnet

A: compressed air generating device (compressed air generating means)

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2, 10 is a device for removing magnetic foreign matter (hereinafter, referred to as a removal device) from the liquid according to the first embodiment of the present invention, wherein the removal device 10 has an upper opening formed at an upper end thereof and a lower end. It is provided on the outer periphery of the cylindrical body 11 which has a cylindrical shape made from stainless steel with the opening part in the lower side, the many magnetic magnetic spheres 12 (magnetic body) accommodated in the inside of the cylindrical body 11, and the cylindrical body 11. As shown in FIG. The slurry pump which supplies the excitation coil 13 which excites the magnetic sphere 12 in the cylinder 11, and the waste oil (liquid) which the cutting debris (magnetic foreign material) mixed in the cylinder 11 from the lower opening part ( Liquid supply means) 14, a processed oil discharge pipe 35 for discharging the processed oil from the cylinder 11, and a waste oil discharge pipe for discharging waste oil including cutting chips in the cylinder 11 ( The liquid discharge means) 27 and the cleaning liquid are supplied from the upper opening in the cylinder 11. Supply pump (cleaning liquid supply means) 16, the compressed air generator (compressed air generating means) A which supplies compressed air into the cylinder 11, and the cylinder 11 at the time of washing | cleaning the magnetic sphere 12 Magnetic foreign matter contained in the cleaning liquid after cleaning at the vibrator (vibration means) 17 and the magnetic force sorting position to which the cleaning liquid after cleaning is supplied to the outer peripheral surface by magnetic force, The transfer-side charity machine 41 when the magnetic foreign substance reaches the non-feed position by the transfer-side charity machine (transfer member) 41 and the transfer-side charity machine 41 which can be transferred from the sorting position to the non-feeding position. A non-side charity (non-member) 42 is provided in which the magnetic foreign matter is attracted to and adsorbed from the outer circumferential surface of the transfer-side charity 41 to the outer circumferential surface due to a magnetic gradient between and.

Hereinafter, each structure is demonstrated in detail.

The end of the cylinder 11 becomes taper gradually toward the downward direction. In the lower end part of the cylinder 11, the wire mesh 18 which prevents the fall of the magnetic sphere 12 is accommodated in the full length state. The excitation coil 13 is disposed on the outer periphery of the cylinder 11 in the longitudinal direction of the cylinder 11 at a predetermined pitch (however, one stage or tens of stages may be used). The excitation coil 13 is supplied with a direct current to magnetize the magnetic sphere 12 in the cylinder 11. On the side of the exciting coil 13, the cooling fan 19 which cools the heat generating excitation coil 13 is provided. Several injection nozzles 20 which inject the cleaning liquid at 10 kg / cm <2> are arrange | positioned in the cylinder 11 in the part between each excitation coil 13 among the peripheral walls of the cylinder 11. However, each injection nozzle 20 may be abbreviate | omitted.

The vibrator 17 is attached to the lower end of the cylinder 11 and vibrates the entire cylinder 11. In addition, the magnetic sphere 12 may be vibrated directly by inserting the vibrating rod connected to the vibration generating device into the cylinder 11 instead of the vibrator 17.

The diameter of the magnetic sphere 12 is 12.7 mm. The magnetic sphere 12 is densely filled in the cylinder 11. The region in which the magnetic sphere 12 is filled in the cylinder 11 is a part which the excitation coil 13 is wound around the outer periphery and comprises a magnetic circuit.

The waste oil pipe 23 which supplies the waste oil in the waste oil storage tank 22 to the cylinder 11 through the 1st valve 21 and the slurry pump 14 is communicated with the lower end part of the cylinder 11. In the middle of the waste oil pipe 23, a washing liquid discharge pipe 25 for discharging the washing liquid for cleaning the inside of the cylinder 11 and the waste oil discharge pipe 27 for discharging the waste oil remaining in the cylinder 11 are communicated with each other. . The 2nd valve 24 is provided in the washing | cleaning liquid discharge pipe 25, and the 3rd valve 26 is provided in the waste oil discharge pipe 27. As shown in FIG. Further, an end portion on the downstream side of the cleaning liquid discharge pipe 25 is disposed on the liquid level of the cleaning liquid storage tank 59 provided immediately below the transfer side chariter 41.

In the upper end of the cylinder 11, the cleaning liquid supply pipe 30 which supplies the cleaning liquid in the cleaning liquid storage tank 59 to the cylinder 11 via the 4th valve 28 and the supply pump 16, and the compressed air generator A The compressed air supply pipe 33 for supplying the compressed air generated by the &lt; RTI ID = 0.0 &gt;) &lt; / RTI &gt; into the cylinder 11 through the fifth valve 31 and the check valve 32, and the processing in which cutting chips are removed in the cylinder 11 The finished oil discharge pipe 35 for discharging the finished oil to the outside through the sixth valve 34 communicates with each other. The upstream end of the cleaning liquid supply pipe 30 is disposed under the liquid level of the cleaning liquid storage tank 59.

Next, with reference to FIGS. 3-6, the structure of the conveying side charity 41 and the non-side charity 42 is demonstrated in detail. First, the transfer side charity machine 41 will be described.

As shown in Fig. 3, in the inner side of the conveying side chariter 41 and the first cylindrical drum 45 which is rotationally driven about the center fixed shaft 41a by a driving source (not shown), A plurality of first magnets 44 are fixedly arranged through the magnet attachment plate 43 around approximately three quarters (approximately C-shaped in FIG. 3).

The non-side charity 42 is formed by opening the gap 46 between the first cylindrical drum 45 and arranging the first cylindrical drum 45 in parallel with the axis through the fixed shaft 47. The two cylindrical drum 48 and the motor 50 which is an example of the drive source which drives the 2nd cylindrical drum 48 via the drive belt 49 are provided. 3 to 5, the second cylindrical drum 48 is rotationally driven in a direction opposite to the first cylindrical drum 45. As shown in FIG. In the interior of the second cylindrical drum 48, two second magnets 52 are arranged in a fixed state via the magnet mounting plate 51, respectively. Each of the second magnets 52 terminates the cutting chips (self-adhesives) moving in the state of being adsorbed to the first cylindrical drum 45 by the magnetic force of the first magnets 44. Adsorb in the vicinity. This end position is above the 1st cylindrical drum 45. As shown in FIG.

The non-side charity 42 will be described in detail below.

The fixed shaft 47 is supported by the fixed bearing which does not show both sides, and is provided so that the attachment angle of the 2nd magnet 52 can be adjusted. The second magnet 52 is a plurality of unit magnets are fixed to the magnet mounting plate 51 in the axial direction (Figs. 4 and 5), so that the magnets adjacent to each other in the circumferential direction alternately with the N pole, S pole It is arranged on an arc. Although the material of a magnet is arbitrary, the neodymium magnet of a rare earth magnet is used in this embodiment. The structure of the first cylindrical drum 45 is also arbitrary. However, unit magnets adjacent to each other in the axial direction constituting each of the first magnets 44 are arranged so as to alternate with the N pole, the S pole, and the N pole. Moreover, the shooter 58 which supplies the used washing liquid to the outer peripheral surface of the 1st cylindrical drum 45 is provided in the outer side of the starting position of the 1st magnet 44 group (FIG. 3). Further, on the outer circumferential surface of the first cylindrical drum 45, a plurality of scribing scratch members 60 parallel to the drum axis are arranged at equal intervals in the circumferential direction thereof. Each scratch member 60 is made of stainless steel and fixed to the first cylindrical drum 45 by welding or the like. The scratch member 60 is similarly welded to the outer peripheral surface of the second cylindrical drum 48.

The second cylindrical drum 48 is made of stainless steel such as SUS304, and holes are formed in the centers of the side plates 53 and 54 to allow the fixing shaft 47 to pass therethrough, respectively. The second cylindrical drum 48 is attached to the fixed shaft 47 via the dustproof bearings 53a and 54a. The V pulley 57 is provided on the side plate 53 via a pipe 53b in the same manner as the second cylindrical drum 48 and the shaft center. The V pulley 57 is connected to the pulley fixed to the output shaft of the motor 50 by the drive belt 49. The rotational force of the motor 50 is transmitted to the second cylindrical drum 48 through the drive belt 49. As another power transmission means, for example, a combination of a sprocket and a chain can be employed.

The tip of the scraper 70 is crimped to an end portion of the outer peripheral surface of the second cylindrical drum 48 near the gap 46. Thereby, the scraper 70 can peel off the cutting chips adhering to the outer peripheral surface of the second cylindrical drum 48.

In addition, although not shown in figure, as a drive system of the 1st cylindrical drum 45, the combination of a motor, a drive belt, and a V pulley can be employ | adopted like the 2nd cylindrical drum 48, for example. The 1st and 2nd cylindrical drums 45 and 48 may adjust a reduction ratio by V pulley, and may use the same motor as a drive source.

Inside the second cylindrical drum 48, a spare magnet mounting plate 61 is arranged, as shown in FIG. Thereby, the magnet 52 can be added to the magnet mounting board 61, and the installation angle can be adjusted.

Next, as shown in FIG. 1 and FIG. 2, the method of removing the cutting chips from the waste oil employing the removal device 10 will be described.

First, the cooling fan 19 is operated and the magnetic sphere 12 in the cylinder 11 is excited by the exciting coil 13 as it is. Therefore, the exciting coil 13 becomes an electromagnet.

Next, the first valve 21 and the sixth valve 34 are opened. As a result, the waste oil (including the cutting chips) in the waste oil storage tank 22 drawn out by the slurry pump 14 is supplied through the waste oil pipe 23 into the cylinder 11 gradually from below. As a result, the waste oil continuously moves upward in the cylinder 11. During this, the cutting chips contained in the waste oil are each stuck to a plurality of magnetized magnetic spheres 12. In this way, the processed oil from which the cutting flakes were removed passes through the processed oil discharge pipe 35 at the upper end of the cylinder 11 and is discharged to the outside.

If operation continues for a certain period, a large amount of cutting chips and the like will stick to each magnetic sphere 12. In this case, the 1st valve 21 and the 6th valve 34 are closed, and supply of waste oil is stopped. Thereafter, the third valve 26 and the fifth valve 31 are opened, and the compressed air generated by the compressed air generator A is introduced into the cylinder 11 from above through the compressed air supply pipe 33. Supply (air blow). As a result, the waste oil remaining in the cylinder 11 is discharged to the outside through the waste oil discharge pipe 27 from the lower portion of the cylinder 11. On the other hand, the valve 28a may be opened before the air blow, hot water may be supplied into the cylinder 11 from the top of the cylinder 11, and the amount of residual waste oil discharged from the waste oil pipe 27 may be increased.

After the predetermined time has elapsed, the third valve 26 and the fifth valve 31 are closed to stop the compressed air from the compressed air generator A. FIG. It is also possible to use the residual liquid as the processed oil here. However, since the residual liquid tends to increase in iron and the like, in order to prevent the incorporation of magnetic foreign substances in the special case, the residual liquid is returned to the waste oil storage tank 22 without being used as used oil. It is more preferable to carry out).

Thereafter, a current of a predetermined magnitude is instantaneously flowed through the exciting coil 13 to reverse the excitation element. Next, the vibrator 17 vibrates the cylinder 11, and the magnetic sphere 12 is stirred in the cylinder 11. Moreover, the 2nd valve 24 and the 4th valve 28 are opened, the supply pump 16 is operated, and the washing | cleaning liquid is passed through the washing | cleaning liquid supply pipe 30 from the washing | cleaning liquid storage tank 59, and the fluid 11 Supply in. At this time, a plurality of injection pumps (not shown) may be operated to inject a part of the cleaning liquid into the cylinder 11 from the plurality of injection nozzles 20 disposed on the circumferential wall of the cylinder 11. At that time, the compressed air generator A is operated, and the cleaning liquid is injected with compressed air of 1 kg / cm 2 or more through a pipe (not shown). The cleaning liquid injected from the injection nozzle 20 penetrates freely between the magnetic spheres 12, and dissolves and removes the oil containing the cutting debris adhered to the magnetic spheres 12 with the action of ultrasonic waves.

The washing | cleaning liquid which flowed in into the cylinder 11 from upper direction extrudes the cutting chips and oil in the cylinder 11 from the lower part of the cylinder 11 outside. The extruded used cleaning liquid is supplied to the shooter 58 of the conveying charity 41 through the cleaning liquid discharge pipe 25.

On the other hand, the magnetic sphere 12 is stirred by the vibration of the cylinder 11 by the vibrator 17, and many magnetic spheres 12 rotate and collide with each other, and contact each other. Thereby, the washing | cleaning liquid sprayed from the injection nozzle 20 can be accommodated in the whole surface of the magnetic sphere 12. FIG. Therefore, the oil and the cutting chips adhering to the magnetic sphere 12 are completely removed. Thereafter, the cutting chips in the cylinder 11 are almost completely removed by passing the predetermined time.

Next, with reference to FIGS. 3-6, the operation | movement of the conveyance side charity machine 41 and the non-side charity machine 42 is demonstrated.

First, the first cylindrical drum 45 is rotated by a drive source (not shown). Although the rotational speed of the 1st cylindrical drum 45 is arbitrary, it is set as about 5 m / min here. In addition, the rotation speed of the 2nd cylindrical drum 48 is 1/4 to 3 times the rotation speed of the 1st cylindrical drum 45, and is set to 5 m / min here.

As shown in FIG. 3, of the used cleaning liquid supplied to the circumferential surface of the first cylindrical drum 45 through the shooter 58, the cutting chips are subjected to the first cylindrical drum by the magnetic force of the first magnet 44. Adsorbed on the surface of 45. The cutting chips rotate while being adsorbed by the first cylindrical drum 45, and remain while sliding the surface of the first cylindrical drum 45 near the end of the rotation direction of the group of the plurality of first magnets 44 arranged in a plurality. At this time, the first magnets 44 adjacent to each other in the axial direction are arranged so that the N pole and the S pole are alternately arranged. Therefore, the cutting chips rotate in a smooth shape in accordance with this.

The cutting chips remaining near the end of the rotation direction of the first magnet 44 group can be scratched by the scratch member 60, and are collected every fixed amount.

Next, the advancing state which the cutting chips move from the 1st cylindrical drum 45 to the 2nd cylindrical drum 48 by the non-side charity 42 is demonstrated using FIG.

The numerical value in FIG. 6 is the numerical value which measured the magnetic flux density in each measuring point of the clearance gap 46 between the 1st cylindrical drum 45 and the 2nd cylindrical drum 48, and a unit is Gaussian. Coordinates are indicated by columns D to M written in the upper part of the partition partitioned in the vertical and horizontal directions and 1 to 16 rows arranged vertically on the right side. For example, the magnetic flux density at point (M, 1) is 30 gauss.

The cutting chips which are adsorbed on the surface of the first cylindrical drum 45 and rotate and move upward are moved from the vicinity of (L, 16) upward. At this time, the change in the magnetic flux density gradually decreases from 2200 gauss. Then, comparing the change in the magnetic flux density in the transverse direction, in the range of (I, 16) to (M, 16) in the 16th row, the right direction in FIG. In Fig. 6, the left side of Fig. 6 is increased to 2900 to 900 gauss. In the rows 9 to 6, the difference between the magnetic flux densities on the left side and the right side in Fig. 6 becomes larger. That is, the cutting chips moved upward by the scratch member 60 from the vicinity of (L, 16) are gradually drawn to the second cylindrical drum 48 on the left side of FIG. It can be pulled off, finally falling towards the surface of the second cylindrical drum 48.

At this time, the gap 46 between both the drums 45 and 48 may be 15 to 50 mm to sandwich the scratch member 60. As the cutting debris moves through the gap 46, most of the used cleaning liquid attached to the surface of the cutting debris is shaken off here, and almost cutting debris is adsorbed to the second cylindrical drum 48. At this time, the moving distance of the cutting chips is 15 to 50 mm, and the effect of shaking off the used cleaning liquid is also great.

In the second cylindrical drum 48, when the cutting chips reach near the end portion on the side opposite to the gap 46 (the rotation position of almost a quarter of the second cylindrical drum 48), the scraper 70 reaches the scraper 70. As a result, the cutting chips are scratched from the outer circumferential surface of the second cylindrical drum 48 and dropped to be discharged to the outside.

After a certain time of cleaning, the fourth valve 28 is closed and the feed pump 16 is stopped. Thereafter, the fifth valve 31 is opened and the compressed air from the compressed air generator A is supplied into the cylinder 11 from the top of the cylinder 11 through the compressed air supply pipe 33. As a result, the washed liquid remaining in the cylinder 11 is supplied from the lower portion of the cylinder 11 to the shooter 58 of the transfer side chariter 41 through the cleaning liquid discharge pipe 25. After a certain time, the second valve 24 and the fifth valve 31 are closed.

Then, the cooling fan 19 is operated again to excite the magnetic sphere 12 in the cylinder 11 by the excitation coil 13 and to open the first valve 21 and the sixth valve 34. Then, the waste oil in the waste oil storage tank 22 is gradually supplied from the lower portion into the cylinder 11 by the slurry pump 14.

Thus, since waste oil is supplied into the cylinder 11 from below, waste oil stays in the cylinder 11 for a long time compared with the former. As a result, the amount by which the cutting debris in waste oil adheres to each magnetic sphere 12 also increases, and the removal efficiency of the magnetic sphere 12 becomes high. In addition, when the waste oil is supplied, there is no fear that the cutting debris is picked up by the magnetic sphere 12 in the upper portion of the cylinder 11, thereby eliminating the risk of adhering the cutting debris to all the magnetic spheres 12 in the cylinder 11 almost uniformly. Can be. Thereby, at the time of washing | cleaning, only the washing | cleaning liquid is supplied from the upper side into the cylinder 11, the cutting | cleaning debris wash | cleaned from the magnetic sphere 12 can be discharged | emitted below the cylinder 11 with excellent efficiency with a washing | cleaning liquid. As a result, the cleaning efficiency of the magnetic sphere 12 can be improved.

In addition, discharge of the liquid from the inside of the cylinder 11 and discharge of the washing | cleaning liquid after the washing | cleaning from the inside of the cylinder 11 are forcibly performed by the compressed air produced | generated by the compressed air generating apparatus A, respectively. Thereby, the discharge time of the liquid from the cylinder 11 and the washing | cleaning liquid after washing | cleaning can be shortened.

In addition, at the time of washing | cleaning each magnetic sphere 12, each magnetic sphere 12 is wash | cleaned, vibrating according to the vibration of the cylinder 11. Thereby, the cutting chips adhering to the magnetic sphere 12 can be removed effectively.

Further, as described above, the cutting chips contained in the used cleaning liquid are attracted to the outer circumferential surface of the first cylindrical drum 45 by magnetic force, and then the transfer-side charity machine 41 and the bee charity machine 42 at this position. The cutting chips are adsorbed on the outer circumferential surface of the second cylindrical drum 48 from the cleaning liquid which has been cleaned by the magnetic gradient between the two ends. In other words, the cleaning liquid remains on the outer circumferential surface of the first cylindrical drum 45, and only cutting chips having a small adhesion amount of the cleaning liquid are attached to the outer circumferential surface of the second cylindrical drum 48. As a result, the washing liquid is subsequently dropped from the outer circumferential surface of the first cylindrical drum 45 to the washing liquid storage tank 59 by its own weight, whereby the recovery amount is increased as compared with the conventional one. In addition, since the waste recovered by the scraper 70 is not cutting debris with a large amount of cleaning liquid attached thereto, it is possible to reduce the waste amount of the waste because the debris has little adhesion amount of the cleaning liquid. As a result, it is possible to simultaneously increase the recovery amount of the cleaning liquid and reduce the waste amount.

[Effects of the Invention]

According to the method for removing magnetic foreign matter from a liquid according to claim 1 and the apparatus for removing magnetic foreign matter from a liquid according to claim 4, since the liquid is supplied from the lower opening to the cylinder, the liquid stays in the cylinder for a long time as compared with the prior art. As a result, the amount of magnetic foreign matter in the liquid adheres to the respective magnetic bodies also increases, and the removal efficiency of the magnetic bodies is increased. In addition, the possibility of magnetic foreign matter being biased and adsorbed to the magnetic body in the upper portion of the cylinder during supply of the liquid is eliminated, and the magnetic foreign substance can be attached almost uniformly to all the magnetic bodies in the cylinder. Therefore, at the time of washing | cleaning, only the washing | cleaning liquid is supplied from the upper opening into a cylinder, and the magnetic foreign material wash | cleaned from the magnetic body can be discharged | emitted from the lower opening with the washing | cleaning liquid with the outstanding efficiency. As a result, the cleaning efficiency of the magnetic body can be improved.

In addition, the magnetic foreign matter contained in the cleaning liquid after washing is adsorbed to the outer circumferential surface of the conveying member by magnetic force, and reaches the position of the vitreous by the conveying member, and is adsorbed from the cleaning liquid to the outer circumferential surface of the vial member. As a result, it is possible to simultaneously increase the recovery amount of the cleaning liquid and reduce the waste amount of the waste.

In particular, according to the inventions of Claims 2 and 5, the discharge of the liquid from the inside of the cylinder and the discharge of the cleaning liquid after the cleaning in the cylinder are forcibly performed by the compressed air generated by the compressed air generating means, respectively. Thereby, the discharge time of the liquid from a cylinder and the discharge time of the washing | cleaning liquid after washing | cleaning can be shortened.

Moreover, according to invention of Claim 3 and Claim 6, at the time of washing | cleaning each magnetic body, it washes, vibrating each magnetic body in accordance with the vibration of a cylinder. Thereby, the magnetic foreign material adhering to the magnetic body can be removed effectively.

Claims (7)

An excitation step of having an upper opening formed at an upper end, a lower opening formed at a lower end, and having a cylinder in which a plurality of magnetic bodies are housed, and energizing an excitation coil provided at an outer circumference of the cylinder, and exciting the magnetic body; A magnetizing step of supplying a liquid in which magnetic foreign matter is mixed into the cylinder from the lower opening at the same time as or after excitation of the magnetic body, and magnetically adhering the magnetic foreign material into the excited magnetic body, and then discharging the treated liquid from the upper opening; A drainage step of discharging the liquid in the cylinder from the lower opening after stopping the supply of the liquid after self-fixing; A washing step of decanting the magnetic body after draining, supplying a cleaning liquid into the cylinder from the upper opening to wash away the magnetic foreign matter adhering to the magnetic body, and discharging the cleaning liquid after the cleaning from the lower opening; An adsorption transfer step of adsorbing magnetic foreign matter contained in the cleaning liquid on the outer peripheral surface of the transfer member by the magnetic force from the cleaning liquid after cleaning; A non-magnetic step of adsorbing magnetic foreign matter on the outer circumferential surface of the non-transparent member by the magnetic gradient between the transfer member and the non-transparent member when the magnetic foreign substance reaches the position where the magnetic foreign substance approaches the outer peripheral surface of the non-transparent member by the conveying member; And A magnetic foreign material removal method from a liquid comprising a separation step of transferring a magnetic foreign material to a disengagement position by said non-transparent member, and disengaging the magnetic foreign substance from an outer peripheral surface of said non-transparent member. The method of claim 1, A liquid foreign material removal method from a liquid, wherein the liquid discharge in the cylinder in the draining step and the cleaning liquid discharge after the cleaning in the cleaning step are performed by compressed air supplied into the cylinder. The method according to claim 1 or 2, In the said washing process, the magnetic foreign material stuck to each magnetic body is wash | cleaned, vibrating the said cylinder, The magnetic foreign material removal method from the liquid characterized by the above-mentioned. An upper opening is formed at an upper end, and a cylinder having a lower opening at a lower end thereof; A plurality of magnetic bodies housed in the cylinder; An excitation coil provided on an outer circumference of the cylinder to excite a magnetic body in the cylinder; The liquid supply which supplies the liquid which the magnetic foreign material mixed into the said cylinder from the said lower opening part, and discharges the processed liquid from which the magnetic foreign material adhered to the magnetic body by excitation by the said excitation coil from the said upper opening part. Way; Processing liquid discharge means for discharging the processed liquid discharged from the upper opening to the outside; Liquid discharge means for discharging the liquid remaining in the cylinder from the lower opening; Cleaning liquid supply means for supplying a cleaning liquid from the upper opening in the cylinder; A transfer member capable of adsorbing magnetic foreign matter contained in the cleaning liquid after cleaning at its outer circumferential surface by magnetic force at the magnetic sorting position to which the cleaning liquid after washing is supplied, and transferring the adsorbed magnetic foreign material from the magnetic sorting position to the non-bearing position; And And a non-magnetic member, which is attracted to and adsorbed from the outer circumferential surface of the transfer member to the outer circumferential surface by the magnetic gradient between the transfer member when the magnetic foreign substance reaches the non-translated position by the transfer member: And said non-members are capable of being separated from the outer peripheral surface by transferring the magnetic foreign substances adsorbed on the outer peripheral surface thereof to a disengaging position different from this from the adsorption position. The method of claim 4, wherein The discharge of the liquid in the cylinder and the discharge of the cleaning liquid after the cleaning from the cylinder are performed by the compressed air supplied into the cylinder from the compressed air generating means. The method according to claim 4 or 5, The said foreign body is provided with the vibration means which vibrates a cylinder at the time of washing | cleaning each magnetic body, The magnetic foreign material removal apparatus from the liquid characterized by the above-mentioned. The method according to claim 4 or 5, The transfer member and the non-members, A non-magnetic cylindrical drum in which magnetic foreign matter is placed on an outer circumferential surface, rotating means for rotating the cylindrical drum in a circumferential direction, and a portion of the inner space of the cylindrical drum opposite to the magnetic separation position in the circumferential direction of the cylindrical drum. With permanent magnets fixed in position, And magnetic force acting on the outer circumferential surface of the cylindrical drum of said beam member is greater than magnetic force acting on the outer circumferential surface of said cylindrical drum of said transfer member.

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