Industrial liquid cleaning device

Abstract

To provide an industrial liquid cleaning device that enables long-term use of industrial liquid by removing bacteria contained in the industrial liquid and by crystallizing components that precipitate as scale.SOLUTION: An industrial liquid cleaning device 100 comprises: a pump 30 that suctions and discharges industrial liquid from a container that stores the industrial liquid; a circulation path 40 that circulates the industrial liquid suctioned from the container; a filter section 50 that filters the industrial liquid; and a magnetic field forming section 60 that forms a magnetic field through which the industrial liquid flowing through the circulation path 40 passes. Both a suction port and a discharge port of the circulation path 40 open into the interior of the container.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an industrial liquid cleaning device, and more particularly, to an industrial liquid cleaning device for cleaning and reusing industrial liquids typified by cutting fluids, coolants, and mold release agents generated during product processing.

Background Art

[0002] A cleaning device for reusing a coolant, which is a type of industrial liquid, is known. As an example of such a cleaning device, there is a configuration disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-61575).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the coolant filtration and cleaning device disclosed in Patent Document 1, for foreign matter removal, an exciting means that acts magnetism on foreign matter to capture the foreign matter is used. By using such an exciting means, foreign matter made of a magnetic material can be reliably removed, but problems such as the possibility of the coolant being spoiled by bacteria contained in the coolant and the problem of scale deposition in the piping have been clarified.

Means for Solving the Problems

[0005] Therefore, the present invention is for solving the above problems, and its object is as follows. That is, the present invention aims to provide an industrial liquid cleaning device that removes bacteria contained in industrial liquids such as cutting fluids and coolants, and crystallizes components that precipitate as scale, enabling the long-term use of industrial liquids.

[0006] As a result of the inventors' intensive research to solve the above problems, they came up with the following configuration. That is, the present invention includes a pump that sucks and discharges the industrial liquid from a container in which the industrial liquid is stored, a flow path through which the industrial liquid sucked from the container flows, a filter section that filters the industrial liquid, and a magnetic field forming section that forms a magnetic field through which the industrial liquid flowing through the flow path passes, and the suction port and discharge port of the flow path both open inside the container, which is an industrial liquid cleaning device characterized by this.

[0007] Thereby, when the industrial liquid passes through a magnetic field, a change in potential occurs in the same way as electrolysis, and oxygen in the industrial liquid is converted into active oxygen. The active oxygen generated from the industrial liquid decomposes and removes bacteria contained in the industrial liquid, and precipitates components that become the source of scale. Therefore, the corruption of the industrial liquid caused by the presence of bacteria and the adhesion of scale to the inside of the pipe are prevented, and the long-term use of the industrial liquid becomes possible.

[0008] Further, the filter section is disposed in a bypass path formed in the flow path, and it is preferable that at least one of the flow destination and the flow rate of the industrial liquid can be adjusted by an adjustment valve disposed in the flow path and the bypass path.

[0009] Thereby, the filter section can be replaced without temporarily stopping the industrial liquid cleaning device. Also, by adjusting the flow rate of the industrial liquid supplied to the filter section, the life of the filter section can be extended.

[0010] Further, it is preferable to further include a housing that houses the pump and the magnetic field forming unit and in which the filter unit and the flow path are disposed, and a holding body that suspends and holds the housing inside the container.

[0011] As a result, the industrial liquid cleaning device can be directly attached to the container of the industrial liquid, eliminating the need to secure a dedicated installation location for the industrial liquid cleaning device.

[0012] Further, it is preferable that the housing is attached to the holding body such that the height position of the suction port of the pump can be changed.

[0013] As a result, the position of the suction port of the pump can be appropriately adjusted according to the storage amount of the industrial liquid in the container.

[0014] Further, it is preferable that the magnetic field forming unit is provided with a plurality of pairs of magnet sets that form the magnetic field in a direction orthogonal to the flow direction of the industrial liquid along the flow direction of the industrial liquid. Moreover, it is more preferable that the direction of the magnetic field formed by each magnet set is different in the flow direction of the industrial liquid.

[0015] As described above, magnetic treatment of the industrial liquid can be efficiently performed.

Advantages of the Invention

[0016] According to the configuration of the present invention, when the industrial liquid passes through a magnetic field, a change in electric potential occurs in the same manner as electrolysis, and oxygen in the industrial liquid is converted into active oxygen. The active oxygen generated from the industrial liquid decomposes and removes bacteria contained in the industrial liquid and precipitates components that form scale, thereby preventing the industrial liquid from spoiling due to the presence of bacteria and the adhesion of scale to the inside of the pipe, enabling the long-term use of the industrial liquid.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0018] Hereinafter, embodiments of the cutting fluid cleaning device 100 as the industrial liquid cleaning device according to the present invention will be described with reference to the drawings. Note that the industrial liquid in this specification is a concept including cutting fluids, coolants, release agent solutions, etc. generated in machining, molding, etc. during product manufacturing.

[0019] (First Embodiment) As shown in FIGS. 1 to 3, the cutting fluid cleaning device 100 in the present embodiment includes a holder 10, a housing 20, a pump 30, a flow path 40, a filter section 50, and a magnetic field forming section 60. The holder 10 has a holding frame 11 formed in a rectangular frame body for holding the housing 20 and a locking portion 12 formed at the upper end portion of the holding frame 11. The locking portion 12 is attached to the holding frame 11 so as to be rotatable within a predetermined angle range with the upper end edge as the rotation axis. The holder 10 is detachably attached to the container by locking the locking portion 12 to the opening edge of a container (not shown) in which the cutting fluid is stored.

[0020] The housing 20 has a container 21 with an open front side and a lid 22 detachably attached to the front opening of the container 21. The container 21 is slidably attached to the inner part of the frame of the holding frame 11, and the attachment height position of the container 21 in the longitudinal direction (height direction) of the holding frame 11 can be changed. An opening 23 is formed in the bottom surface of the container 21, and a filter unit 50 is attached so as to cover the opening 23. A guide line 24 indicating the height position of the suction port of the pump 30 housed in the container 21 is displayed on the outer surface of the lid 22. In the cutting fluid cleaning device 100 of the present embodiment, the attachment height position of the container 21 with respect to the holding frame 11 and the height position of the liquid level of the cutting fluid are adjusted so that the height position of the liquid level of the cutting fluid housed in the container is equal to or higher than the height position of the guide line 24.

[0021] After sucking the cutting fluid housed in the container, the pump 30 discharges the cutting fluid into a flow path 40 connected to the discharge port of the pump 30. The suction port of the pump 30 only needs to be disposed (fixed) in the container 21 at a height position equal to or higher than the height position of the upper surface of the filter unit 50, and the suction port of the pump 30 may be in direct contact with the upper surface of the filter unit 50. Thus, since the cutting fluid housed in the container is sucked from the suction port of the pump 30 after passing through the filter unit 50, chips and the like are not sucked into the pump 30.

[0022] The cutting fluid discharged from the pump 30 flows through the flow path 40 and is supplied to the magnetic field forming unit 60 disposed in the path of the flow path 40. The magnetic field forming unit 60 in the present embodiment is detachably attached to the housing 21 of the housing 20 by the stay 70. Further, as shown in FIGS. 2 to 4, the magnetic field forming unit 60 has two magnets 62 (corresponding to a pair of magnet sets) with the N pole and the S pole opposed to each other in the diameter direction of the cylindrical container 61 on the outer peripheral surface of the cylindrical container 61 so that a magnetic field in a direction orthogonal to the flow direction of the cutting fluid (the extending direction of the flow path 40) is formed. Further, the magnets 62 are arranged so that the directions of the magnetic fields are different along the flow direction of the cutting fluid in the flow path 40. In the present embodiment, the magnets 62 are arranged at a plurality of locations (here, four locations) at required intervals along the flow direction of the cutting fluid, and the directions of the magnetic fields adjacent to each other in the flow direction of the cutting fluid are different by 90 degrees each. By adopting such an arrangement of the magnets 62, it is advantageous in that the directions of the magnetic fields through which the cutting fluid passes are different and the magnetic treatment can be performed efficiently.

[0023] In this way, when the cutting fluid containing water passes through the magnetic field (magnetic field) formed in the magnetic field forming unit 60, an electric field (electric field) is generated in the magnetic field forming unit 60, and the cutting fluid is electrolyzed by the electrical force due to the electric field, and the oxygen dissolved in the cutting fluid is converted into active oxygen. By electrolyzing the cutting fluid, the components forming the scale contained in the cutting fluid are crystallized, and the precipitation of scale on the piping is suppressed. Further, by generating active oxygen in the cutting fluid, the bacteria in the cutting fluid are decomposed, and the corruption of the cutting fluid can be prevented. The flow path 40 in the present embodiment is also connected to the outlet of the magnetic field forming unit 60, and the discharge port (outlet) of the flow path 40 opens into the container, so that the cutting fluid stored in the container is repeatedly subjected to the electrolysis treatment and the active oxygen generation treatment by the magnetic field forming unit 60.

[0024] When the coolant processor determines that the cleaning process for the coolant stored in the container has been sufficiently performed by visual inspection or the like, the coolant cleaning device 100 can be removed from the container and attached to another container to perform the same cleaning process. After confirming that the height position of the guide line 24 displayed on the lid 22 of the housing 20 of the coolant cleaning device 100 attached to the container is at a height position below the liquid level height of the coolant, power can be applied. If the height position of the guide line 24 is not below the liquid level height of the coolant, the coolant processor changes the attachment position of the housing 20 to the holding frame 11 to adjust the height position of the guide line 24. By repeating the above, the coolant stored in a plurality of containers can be sequentially cleaned.

[0025] (Second Embodiment) FIG. 5 is a schematic configuration diagram of the coolant cleaning device 100 in the present embodiment. The coolant cleaning device 100 in the present embodiment is installed and used outside the container in which the coolant is stored. In the coolant cleaning device 100 in the present embodiment, a suction port (not shown) which is the upstream end of the flow path 40 opens inside a container (not shown), and an intermediate portion of the flow path 40 is drawn out to the outside of the container. A bypass path 41 for branching the flow path is formed in the flow path 40 drawn out to the outside of the container. A filter section 50 and a magnetic field forming section 60 are disposed in the bypass path 41. The filter section 50 and the magnetic field forming section 60 in the present embodiment are integrally formed, but the filter section 50 and the magnetic field forming section 60 may be independently disposed. First regulating valves 42 are disposed at each of the upstream position and the downstream position of the filter section 50 and the magnetic field forming section 60 in the bypass path 41. Further, a second regulating valve 43 is disposed between the branch portion of the bypass path 41 and the confluence portion of the bypass path 41 in the flow path 40.

[0026] The discharge port, which is the downstream end of the flow path 40, opens into the interior of the container where the suction port is open, and is configured to circulate and process the cutting fluid stored in the container in the same manner as in the first embodiment. However, the suction port and the discharge port of the flow path 40 are not the same container, and the containers before and after the cleaning process by the cutting fluid cleaning device 100 can be separated. Also, a cascade container form can be adopted in which two or more containers are used, the cutting fluid cleaning device 100 relays between the respective containers, and then the cutting fluid after the cleaning process is returned to the original container. When the cascade container form is adopted, the mesh size of the filter section 50 of the cutting fluid cleaning device 100 arranged on the downstream side can be made smaller or larger than the mesh size of the filter section 50 of the cutting fluid cleaning device 100 arranged on the upstream side. According to the form in which the mesh size of the filter section 50 of the cutting fluid cleaning device 100 arranged on the downstream side is gradually reduced, it is advantageous in that a more precise cleaning process of the cutting fluid can be performed.

[0027] Also, according to the cutting fluid cleaning device 100 in the present embodiment, when replacing the filter section 50, if the first regulating valve 42 is closed and the second regulating valve 43 is opened, the filter section 50 (in this embodiment, the filter section 50 and the magnetic field forming section 60) can be excluded from the flow destination (supply destination) of the cutting fluid flowing through the flow path 40. Thereby, the leakage of the cutting fluid from the flow path 40 during the replacement of the filter section 50 can be minimized. Note that a form can also be adopted in which the filter section 50 and the magnetic field forming section 60 are made independent, and the magnetic field forming section 60 is arranged at a position downstream of the downstream confluence point of the bypass path 41 of the flow path 40. According to this form, the process of passing the cutting fluid through the magnetic field forming section 60 can be continued even during the replacement of the filter section 50.

[0028] The cutting fluid cleaning device 100 as an embodiment of the industrial liquid cleaning device according to the present invention has been described in detail above. However, the present invention is not limited to the above embodiments. For example, in the first embodiment, an opening 23 is formed on the bottom surface of the housing 20, and a filter unit 50 in which a mesh body is disposed in a manner covering the opening 23 is adopted. However, a form in which a filter unit 50 having another known form is disposed on the path of the flow path 40 can also be adopted. Further, the filter unit 50 can also be disposed in a bypass path 41 formed in the flow path 40.

[0029] In addition, the first adjustment valve 42 and the second adjustment valve 43 in the second embodiment are not limited to valves that only perform on / off switching of the passage of the cutting fluid, and a flow rate adjustment valve capable of adjusting the flow rate of the cutting fluid can also be adopted. By using flow rate adjustment valves for the first adjustment valve 42 and the second adjustment valve 43, a part of the cutting fluid flowing through the flow path 40 can be passed through the filter unit 50, which is advantageous in that the life of the filter unit 50 can be extended. Further, even when the filter unit 50 becomes clogged, a part of the cutting fluid flowing through the flow path 40 flows around the filter unit 50, so that complete clogging of the flow path 40 can be avoided.

[0030] In addition, in the magnetic field forming unit 60 in the above embodiments, the flow path space of the cylindrical container 61 is formed in a reduced diameter form in a required length range including the portion where the magnet 62 is disposed. By adopting this form, the flow rate of the cutting fluid in the portion where the magnet 62 is disposed can be increased, and the arrangement interval of the magnets 62 can be shortened. As a result, the central magnetic force of the magnetic field formed by the magnetic field forming unit 60 increases, which is advantageous in that the magnetic treatment effect on the cutting fluid can be enhanced.

[0031] Furthermore, a configuration can be adopted in which an ozone generator and an operation control unit (both not shown) for controlling the operation of the ozone generator are disposed in the middle of the flow path 40. The operation control unit can execute a process of operating the ozone generator for a preset ozone treatment time when the coolant cleaning device 100 resumes operation after stopping operation for a time exceeding a preset reference time. Thereby, deodorization treatment of the coolant can be performed by bringing the coolant into contact with ozone generated by the ozone generator. Also, by restricting the contact time between the coolant and ozone, it is advantageous in that deodorization treatment can be performed while preventing deterioration of the coolant.

[0032] In addition to the modified examples described above, it is also possible to adopt a configuration in which the modified examples and the like described in the embodiments are appropriately combined.

Explanation of Reference Numerals

[0033] 10: Holder 11: Holding frame, 12: Locking portion 20: Housing 21: Container, 22: Lid, 23: Opening, 24: Guide line 30: Pump 40: Flow path 41: Bypass path, 42: First regulating valve, 43: Second regulating valve 50: Filter section 60: Magnetic field forming section 61: Cylindrical container, 62: Magnet 70: Stay 100: Coolant cleaning device (industrial liquid cleaning device)

Claims

1. A pump for sucking and discharging the industrial liquid from a container containing the industrial liquid, A flow path for flowing the industrial liquid sucked from the container, A filter section for filtering the industrial liquid, A magnetic field forming section for forming a magnetic field through which the industrial liquid flowing through the flow path passes, and comprising: An industrial liquid cleaning device, characterized in that both the suction port and the discharge port of the flow path open inside the container.

2. The filter section is disposed in a bypass path formed in the flow path, and at least one of the flow destination and the flow rate of the industrial liquid can be adjusted by an adjustment valve disposed in the flow path and the bypass path. The industrial liquid cleaning device according to Claim 1, characterized in that

3. The industrial liquid cleaning device according to Claim 1, further comprising a housing that houses the pump and the magnetic field forming section and in which the filter section and the flow path are disposed, and a holding body that suspends and holds the housing inside the container.

4. The industrial liquid cleaning device according to Claim 3, characterized in that the housing is attached to the holding body such that the height position of the suction port of the pump can be changed.

5. The industrial liquid cleaning device according to any one of Claims 1 to 4, characterized in that the magnetic field forming section has a pair of magnet sets that form the magnetic field in a direction orthogonal to the flow direction of the industrial liquid and are disposed at a plurality of locations along the flow direction of the industrial liquid.

6. The industrial liquid cleaning device according to Claim 5, characterized in that the directions of the magnetic fields formed by the respective magnet sets are different in the flow direction of the industrial liquid.

Images