JP5346971B2 - Filtration device using air-driven pump device - Google Patents

Description

  The present invention relates to an air-driven pump device and a filtration device using the air-driven pump device.

  In an operation for machining, a liquid (liquid to be processed) may be supplied to a processing portion for cooling, lubrication, or removal of processing waste. The used liquid is usually reused by removing processing waste and the like. In order to remove the processing waste in the liquid, a filtration device or a cleaning device is used. For example, there are apparatuses such as Patent Document 1 and Patent Document 2. Patent Document 1 discloses a liquid purification device that separates and recovers emulsified oil, and Patent Document 2 discloses a removal device that mainly removes solids such as work waste (work waste).

  By the way, the devices disclosed in Patent Document 1 and Patent Document 2 and known devices use electricity as a power source. Electric power is used to rotate and move the filter medium, a pump for supplying liquid from the tank to the filter member, a means for generating magnetism to separate the magnetic material by magnetic force. Depending on the factory where these devices are installed, electric power may not be used as a power source. For example, compressed air is raised. In such a case, since there is no line for supplying power in the factory, it is necessary to newly provide a line for supplying power for a filtering device or the like, which takes time and cost.

JP-A-9-75607 Japanese Patent Laid-Open No. 9-309043

This invention is made | formed in view of the said subject, and makes it the subject which should be solved to provide the filtration apparatus using the air drive pump apparatus which uses air instead of electric power as a motive power source.

An air-driven pump device according to claim 1 for solving the above problem is driven by air supplied from an air source, and moves the liquid to be treated from the tank to the filtration tank ;
An air valve located between the air source and the air-driven pump and capable of switching between an introduction position for introducing the air into the air-driven pump and a blocking position for blocking the introduction;
A valve box, a supply port for supplying the air from the air source to the valve box, a connection part for connecting the valve box and the air valve to flow the air, and the water surface of the tank or the filtration tank. A float that moves up and down according to a liquid level to change the amount of air discharged to the connecting portion, and an air switching unit that switches the introduction position and the blocking position of the air valve according to the change in the amount of discharge,
That it has a.

  Here, the liquid to be treated is a liquid in which processing scraps are mixed with a liquid used in processing operations such as cutting and polishing.

The feature in construction of the invention according to claim 1 for solving the above problems, and Rue A pumping device be supplied to the filtration tank said liquid to be treated from the tank in which the processing liquid is liquid storage,
A filter disposed in the filtration tank, for filtering processing waste and sludge in the liquid to be treated;
A second air-driven pump driven by the air supplied from the air source and returning the filtrate filtered by the filter from the filtration tank to the tank;
A discharge means that is driven by the air that can be supplied from the air source and that discharges the processing waste and sludge filtered in the filtration tank to the outside of the filtration tank;
It is to have.

Further, the structural feature of the invention according to claim 2 is that, in claim 1 , processing waste and sludge not filtered by the filter from the filtrate returned from the filtration tank to the tank by the second air-driven pump. Further having a cyclone separator for discharging the separated processing waste and sludge to the discharge means,
The second air drive pump is to return the second filtrate obtained by further removing processing waste and sludge from the filtrate in the filtration tank to the tank.

  Here, the cyclonic separator is a device for separating a powdery solid mixed in a gas or liquid, and a known device called a cyclone is used. The present application includes simple centrifuges and their applications.

The structural feature of the invention according to claim 3, Oite to claim 1 or 2, wherein the filter has an air driven motor for rotating the filter by the air of the air source, the air-driven The filtration part for filtering the liquid to be treated supplied to the filtration tank by the pump device is changed by rotation, and the part used for the filtration is appropriately washed.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the discharge unit includes a belt and an air drive motor that rotates the belt by the air of the air source. Is to have.

A structural feature of the invention according to claim 5 is that, in claim 4 , the tank is provided with stirring means,
The stirring means is connected to the output shaft of the air drive motor or the rotation shaft of the belt, and when the air drive motor is driven, the stirring brush in the tank rotates and the cover in the tank is rotated. Stir the treatment liquid.

The air-driven pump device according to claim 1 is configured such that an air-driven pump that moves liquid from a tank to a filtration tank is driven by air, and an air valve that switches between introducing air to the air-driven pump and blocking introduction of air is air Done in That is, the liquid can be moved only by air. Switching between the introduction position and the shut-off position of the air valve is performed by the air switching means based on the discharge amount of the air supplied to the valve box being discharged from the valve box. The amount of air discharged varies depending on the float that rises on the surface of the tank or filtration tank and moves up and down as the liquid level changes. Air is supplied from the same air source to both the air drive pump and the air switching means. The float that moves up and down depending on the liquid level may be installed in a tank in the first predetermined place where the liquid pumped up by the air-driven pump is stored or in a filtration tank in the second predetermined place where the liquid has moved by the air-driven pump. it can. Here, the tank simply represents a liquid that can be stored, and includes a naturally formed pond or lake, and is expressed as a tank for convenience. Further, assuming that the float floats in either the tank or the filtration tank , the liquid may not necessarily be stored if the float is not installed.

Therefore, according to the air-driven pump device of the first aspect, since the air-driven pump driven by air can be automatically driven and stopped using air, air is used as a power source instead of electric power. And can be immediately installed in factories that use industrial compressed air as a power source.

The invention according to claim 1, Rue A pumping device can automatically using an air driving and stopping of the air-driven pump driven by an air (a first air-driven pump), and the filter is driven by an air A second air-driven pump; and a discharge means driven by air. First air pumping device to supply test liquid to be treated in the tank to the filtration tank by air. The filtrate filtered by the filter of the filter tank is returned to the tank by the second air-driven pump, and the filtered processing waste and sludge are discharged from the filter tank by the discharge means. The first air drive pump, the second air drive pump, and the discharging means are all driven by air supplied from an air source. Therefore, according to the invention which concerns on Claim 1 , in order to filter a processing waste and sludge from to-be-processed liquid, air is used instead of electric power as a power source, and it is immediately in the factory which uses industrial compressed air as a power source. Can be introduced.

The invention according to claim 2 further includes a cyclone separator that can separate and discharge the filtrate filtered by the filter of the filtration tank into processing waste and sludge by a cyclone. Therefore, according to the invention which concerns on Claim 2 , in order to filter a process waste and sludge from to-be-processed liquid, air is used instead of electric power as a power source, and it is immediately in the factory which uses industrial compressed air as a power source. Can be introduced.

In the invention according to claim 3 , the filter is rotated by an air driving motor driven by air. By rotating the filter, the portion for filtering the liquid to be treated is changed. And the filtration part used by filtration is wash | cleaned suitably by moving by rotation. According to the invention of claim 3 , since the filter is appropriately washed, the liquid to be treated can be filtered while the filter is backwashed. Therefore, air is used instead of electric power as a power source, and it can be immediately introduced into a factory using industrial compressed air as a power source.

In the invention according to claim 4 , the discharge means has a belt and an air drive motor that rotates the belt, and the air drive motor rotates the belt by air, so that filtered work waste and sludge are removed from the filtration tank to the outside. Discharge. According to the invention of claim 4 , since the discharging means rotates the belt by air and is discharged outside from the filtration tank, air is used instead of electric power as the power source, and industrial compressed air is used as the power source. Can be immediately introduced into the factory.

The invention according to claim 5 further includes stirring means for stirring the inside of the tank. The stirring means is connected to the output shaft of the air drive motor of the discharge means. When the air drive motor is driven, the stirring brush in the tank rotates to stir the liquid to be treated in the tank. That is, the liquid to be treated in the tank is agitated by air. According to the invention which concerns on Claim 5 , since the to-be-processed liquid in a tank can be stirred with a stirring means, it prevents that a processing waste and sludge accumulate in a tank, and filters a to-be-processed liquid efficiently. be able to. Moreover, since stirring can also be performed by air, air is used instead of electric power as a power source, and it can be immediately introduced into a factory using industrial compressed air as a power source.

It is explanatory drawing which represents typically the structure of the filtration apparatus 10 of this Embodiment 1. FIG. (A) is explanatory drawing which represents typically the principal part of the 1st supply means 1 used with the filtration apparatus 10 of this Embodiment 1, the discharge port 85 is an open state, (b) is the discharge port 85. Closed state. It is explanatory drawing showing the cross section about the principal part in the filtration tank 3 used with the filtration apparatus 10 of this Embodiment 1. FIG. It is explanatory drawing showing the state seen from the upper part about the main part in the filtration tank 3 used with the filtration apparatus 10 of this Embodiment 1. FIG. It is explanatory drawing showing the cross section of the coolant tank 100 used with the filtration apparatus 10 of this Embodiment 1. FIG. It is explanatory drawing showing the cross section about the principal part in the filtration tank 3 used with the filtration apparatus of this Embodiment 3. FIG. It is explanatory drawing showing the state seen from the upper part about the main part in the filtration tank 3 used with the filtration apparatus of this Embodiment 3. FIG. (A) is explanatory drawing showing a part of structure of the pilot valve 8 of other embodiment, the discharge port 85 is an open state, (b) is the discharge port 85 being a closed state.

  A representative embodiment of the present invention will be described with reference to FIGS. The air-driven pump device according to the present embodiment is used for a filtration device (a filtration device using an air-driven pump device) for filtering processing waste and sludge in a liquid (liquid to be treated). And the filtration apparatus concerning this embodiment is used in order to remove a processing waste, sludge, etc. from the coolant (processed liquid) utilized for machining, and to make a coolant reusable. In addition, the processing waste and sludge may be represented by triangles and stars in the drawing, and the size is triangle> star.

(Embodiment 1)
As shown in FIG. 1, the filtration device 10 of Embodiment 1 includes a coolant tank (tank) 100, a first supply unit (air-driven pump device) 1, a second supply unit (second air-driven pump) P2, It has a filtration tank 3, a filter 4, a belt conveyor (discharge means) 5, a cyclone separator 6, and a removed matter tank 7. And it has an air source which is not illustrated. The coolant is stored in the coolant tank 100. Processing waste and sludge are mixed in the coolant. In FIG. 1, the illustration of the processing waste and sludge in the coolant tank 100 is omitted.

  As shown in FIGS. 1 and 2, the first supply means 1 includes a first air drive pump P 1, an air valve 12, a pilot valve (air switching means) 8, a path member 14, and a chamber 15. .

  The first air drive pump P1 is driven by being supplied with air from an air source, and evacuates the chamber 15. The air valve 12 is located between the air source and the first air drive pump P1, and is an introduction position for introducing air into the first air drive pump P1, and a shut-off that blocks introduction of air into the first air drive pump P1. It is a valve that can be switched between positions. When the first air drive pump P <b> 1 is driven, the air in the chamber 15 is sucked out, the inside of the chamber 15 is evacuated, and the coolant flows into the chamber 15 through the path member 14. The air extracted by the first air drive pump P1 is discharged into the filter tank 3 to take into account the noise reduction effect and the coolant treatment when sucked together with the air. When a predetermined amount of coolant flows into the chamber 15, the lid 151 attached to the chamber 15 opens. The lid 151 can be opened and closed by an air cylinder and is disposed below the chamber 15. The coolant that has flowed into the chamber 15 is discharged to the filter 4 installed in the filtration tank 3 by opening the lid 151. .

  The pilot valve 8 switches the air valve 12 that introduces or shuts off the air to the first air drive pump P1 between the introduction position and the shut-off position. As shown in FIG. 2A, the pilot valve 8 includes a valve box 81, a supply port 82, a connecting portion 83, a float 84, a discharge port 85, and a control unit 86. Air is supplied to the valve box 81 from the supply port 82, and air is discharged from the connection 83 and / or the discharge port 85 from the supply. The connecting portion 83 connects the valve box 81 and the air valve 12 so that the air flows. The float 84 floats on the water surface and moves up and down depending on the liquid level. A shaft 841 having one end fixed to the float 84 is attached to the float 84. A valve 842 is attached in the middle of the shaft portion 841, and the other end side is inserted into the valve box 81 from the discharge port 85 so that the float 84 does not come off from the valve box 85. The rise of the float 84 stops when the valve 842 comes into contact with the valve seat 851 attached to the discharge port 85 (see FIG. 2B). When the discharge port 85 is closed by the valve 842, the air supplied to the valve box 81 is discharged only from the connecting portion 83. The control part 86 is located in the middle of the connection part 83, and switches the air valve 12 by the pressure difference of the air discharged from the valve box 81 to the connection part 83. In the pilot valve 8 used in the filtration device 10 of the first embodiment, the liquid level at which the float 84 is floated rises to a predetermined value or more, and the air valve 12 is switched to the blocking position (if the blocking position is set, the blocking position is set). maintain). If the liquid level at which the float 84 is floated falls below a predetermined value (see FIG. 2A), the air valve 12 is switched to the introduction position (if the introduction position is maintained, the introduction position is maintained). The float 84 is floated on the filtration tank 3, and the first air drive pump P <b> 1 can be driven and stopped by the liquid level of the filtration tank 3.

  Returning to FIG. 1, the coolant flows into the filtration tank 3 from the coolant tank 100 by the first supply means 1. A filter 4 and a belt conveyor 5 described later are set in the filtration tank 3.

  The filter 4 employs a disk-shaped wire mesh. The filtration accuracy is appropriately selected based on the processing waste and sludge to be filtered. As shown in FIG. 3, the filter 4 is unidirectional with the axis direction passing through the center of the disk perpendicular to the surface as the center of rotation by an air drive motor (not shown) driven by air from an air source. Rotate to. The direction of rotation may be either clockwise or counterclockwise, and is determined as appropriate and is not particularly limited. Further, regarding the rotation of the filter 4, if the rotation direction is determined, the rotation in the reverse direction is not prohibited. When the rotation starts in one direction, the rotation continues in the same direction. It means that the configuration is not changed immediately. The filter 4 has a filtration part 41 and a backwash part 42. The coolant discharged from the chamber 15 is injected into the filtration portion 41. The coolant discharged from the chamber 15 is, for example, a funnel-shaped member, receives coolant from the upper side of the large opening, and installs the foot portion with a narrow diameter near the filtration portion 41 of the filter 4. , And flow out to the filtration part 41. And the primary treatment liquid which passed through the filtration part 41 and flowed into the filtration tank 3 is sprayed to the backwash part 42. The primary processing liquid is pumped by the second supply means P2 described later. As shown in FIG. 4, coolant is sprayed onto the filter 4 from different directions in the filtration portion 41 and the backwash portion 42. The filter 4 rotates in one direction, and the filtration part 41 and the backwash part 42 move. When the portion that was the filtration portion 41 reaches the backwash portion 42, it is washed with the primary treatment liquid and becomes the filtration portion 41. The filter 4 is continuously used by rotating substantially the entire surface of the filter 4 as the filtering portion 41 while being rotated and being washed by the backwashing portion 42. In addition, both the filtration part 41 and the backwashing part 42 in a figure do not necessarily surround the metal mesh of the filter 4 with some elements, but only represent the place where the liquid is ejected typically. Moreover, although the range is not limited to an elliptical shape as shown in the figure, the filtration part 41 and the backwash part 41 are not provided in the same place, but are preferably separated to some extent. Further, the filtration part 41 is preferably a part not immersed in the coolant liquid in the filtration tank 3 so that the coolant flowing into the filtration tank 3 can surely flow after passing through the filter 4.

  The belt conveyor 5 includes a belt 51 and an air drive motor (not shown). As shown in FIG. 1, one end of the belt 51 is immersed in the coolant in the filtration tank 3, gradually becomes higher, comes out of the coolant in the filtration tank 3, and the other end protrudes from the filtration tank 3. A removed matter tank 7 is installed below the other end. The belt 51 is rotated by an air drive motor whose at least one rotation shaft is driven by air from an air source, so that the upper surface 511 moves from the lower side of the filter 4 to the outside of the filtration tank 3. The belt 51 moves by a shaft that rotates by a driven or a shaft that does not rotate, in addition to a rotating shaft that is rotated by an air drive motor. As shown in FIGS. 1, 3, and 4, the filter 4 is positioned above one end of the belt 51 that is immersed in the coolant in the filtration tank 3. As shown in FIG. 4, the filter 4 is arranged such that the rotation shaft is perpendicular to the moving direction of the belt 51. The coolant passes through the filter 4, and machining waste and sludge that cannot pass through the filter 4 fall onto one end of the belt 51 below the filter 4. Since the upper surface 511 of the belt 51 moves from the filtration tank 3 to the outside, the processing waste and sludge that have fallen on the upper surface 511 of the belt 51 move to the outside of the filtration tank 3 and are removed from the other end of the belt 51 from the removed matter tank. Fall to 7. A backwash portion 42 where the filter 4 is backwashed is also located at one end of the belt 51 in the filtration tank 3. Processing waste and sludge removed from the filter 4 by backwashing also fall on the belt 51 and are transported to the removed matter tank 7 outside the filtration tank 3.

  Returning to FIG. 1, the second supply means P <b> 2 pumps the primary treatment liquid in the filtration tank 3 after passing through the filter 4 to a cyclone separator 6 described later. The primary treatment liquid is sucked from the suction portion 21 in the filtration tank 3 and is pumped to the cyclone separator 6 via the path member 22, the second supply means P 2, and the path member 23.

  In the cyclonic separator 6, the primary treatment liquid fed by the second supply unit P <b> 2 is separated into machining waste and sludge and liquid. The separated processing waste and sludge are discharged to the belt 51 from below the cyclone separator 6. Then, the secondary processing liquid from which the processing waste and sludge have been removed flows out from above the cyclone separator 6 to the coolant tank 100 via the path member 61. Note that the coolant pressure-fed to the backwash portion 42 of the filter 4 may be either a primary treatment liquid or a secondary treatment liquid. As shown in FIG. 1, the filtration device 10 according to the first embodiment is configured to pump the primary treatment liquid to the filter 4 side. A configuration is also possible in which the secondary treatment liquid discharged from the cyclonic separator 6 is branched from the path member 61 and pumped to the backwash portion 42 of the filter 4.

  The filtration device 10 according to the first embodiment further includes a stirring unit 52. As shown in FIG. 5, the stirring means 52 includes a brush 521 that is immersed in the coolant of the coolant tank 100 and a flexible shaft 522 that is connected to the brush. The other end of the flexible shaft 522 that is connected to the brush 521 is connected to a rotating shaft that moves the belt 51. The rotating shaft to which the flexible shaft 522 is connected may be a rotating shaft that is rotated by an air driving motor of the belt conveyor 5 or a rotating shaft that is not directly rotated by the air driving motor. When the belt conveyor 5 operates, the flexible shaft 522 rotates and the brush 521 connected to one end rotates. By rotating the brush 521, the processing waste and sludge accumulated in the coolant tank 100, particularly at the bottom, are agitated, soared into the liquid, and are easily sucked into the chamber 15 by the first supply unit 1. Even in the case where the inside of the coolant tank 100 is not stirred by the stirring means 52, the filtration device 10 according to the first embodiment has the inside of the coolant tank 100 caused by the inflow of the secondary treatment liquid returned to the coolant tank 100 by the second supply means P2. Stir. However, by adding the stirring means 52, the inside of the coolant tank 100 is further stirred, and the processing waste and sludge rise more in the liquid.

  The filtration device 10 of Embodiment 1 filters the coolant in two stages. In the first stage filtration, large processing waste and sludge are removed in the first stage, and in the second stage filtration (cyclonic separation), processing waste and sludge smaller than those in the first stage are removed. Then, the processing solution and sludge are removed so that the coolant can be reused while returning the circulating secondary treatment liquid to the coolant tank 100 and circulating it. By using the two pumps of the first air drive pump P1 and the second supply means P2 of the first supply means 1, the filtration is performed in two stages. However, the filtration according to the first embodiment avoids the overflow of the coolant from the filtration tank 3 and the emptying of the filtration tank 3 due to the difference in performance between the two pumps and the filtration processing capacity. This is taken into account in the device 10. That is, the first air drive pump device P1 of the first supply means 1 is employed. In the first supply means 1, the first air-driven pump device P1 moves more coolant than the second supply means P2 to constantly increase the amount supplied to the filtration tank 3, and the first air-driven pump device P1 Driving and stopping are performed according to the liquid level of the filtration tank 3.

  The filtration device 10 according to the first embodiment uses air as a power source necessary for each component to be driven, rotated, moved, and the like. Compressed air is supplied from an air source, and air that has been decompressed using decompression means as necessary is used. The filtration device 10 according to the first embodiment does not use electric power as a power source, and uses compressed air as a power source. Therefore, it can be easily introduced into a factory or the like that operates using air as a power source.

(Embodiment 2)
The filtration device of the second embodiment has a configuration without the cyclonic separator 6 of the filtration device 10 of the first embodiment. The filtration device of Embodiment 2 is configured to return the primary treatment liquid that has passed through the filtration portion 41 of the filter 4 in the filtration tank 3 to the coolant tank 100 by the second supply means P2. If the processing waste and sludge can be removed only by the filter 4 of the filtration tank 3 depending on the type and size of the processing waste and sludge mixed in the coolant and the processing capacity of the filter, the configuration as a filtration device is simple. The device can be made smaller accordingly.

  Alternatively, in FIG. 1, the path member 23 through which the secondary processing liquid flowing out from the second supply means P <b> 2 passes and the path member 61 from above the cyclone separator 6 to the coolant tank 100 are connected. And it can also be set as the structure which can switch whether the primary process liquid from the 2nd supply means P2 flows in into the cyclone type separator 6, or does not go through the cyclone type separator 6. FIG. Although it is necessary to consider the type, size, and removal rate of the processing waste and sludge to be removed, there is an advantage that the filtration time can be shortened as compared with the case of removal via the cyclone separator 6.

(Embodiment 3)
The filtration device according to the third embodiment has substantially the same configuration and operational effects as the filtration device 10 according to the first embodiment. The following mainly describes the different parts.

  The filtration device of Embodiment 3 employs a cylindrical filter. The filters 4A and 4B rotate about the axis direction as a rotation axis. As shown in FIGS. 6 and 7, the rotation direction is related to the way in which the filters 4A and 4B are installed. First, the case where the filter 4A in which the axial direction is orthogonal to the moving direction of the belt 51 is set will be described. FIG. 6 shows a case where the filtration tank 3 is viewed from the side. As shown in FIG. 6, the filter 4 </ b> A rotates in the direction in which the rotation axis is orthogonal to the moving direction of the belt 51. The rotation direction can be either clockwise or counterclockwise in FIG. In FIG. 6, it rotates counterclockwise.

  The coolant passes through the internal space of the filter 4A and flows downward from above the filter 4A. A rubber spatula 53 is disposed between the upper side and the lower side of the filter 4A and between the sides on which the filter 4A rotates. The rubber spatula 53 is formed from the surface of the filter 4A to the upper surface 511 of the belt 51. The processing waste and sludge filtered above are scraped off from the surface of the filter 4 </ b> A by the rubber spatula 53 and fall onto the belt 51. When the portion used in the filtration is positioned below by rotation, the coolant (primary treatment liquid) from above passes reversely to the time when it is above and is cleaned.

  Next, the case where the filter 4B is set with the axial direction parallel to the moving direction of the belt 51 will be described. FIG. 7 shows a case where the filtration tank 3 is viewed from above. As shown in FIG. 7, the rotation direction of the filter 4 </ b> B is orthogonal to the moving direction of the belt 51. The filter 4B does not necessarily need to have a rotational direction orthogonal to the moving direction of the belt 51. It is sufficient that the rubber spatula 53 is set while rotating from the upper side to the lower side of the filter 4B, and the upper surface 511 of the belt 51 is disposed below the rubber spatula 53. The coolant passes through the internal space of the filter 4B from above the filter 4B and flows downward. A rubber spatula 53 is disposed between the upper side and the lower side of the filter 4B and between the side on which the filter 4B rotates. The rubber spatula 53 is disposed from the surface of the filter 4A to the upper surface 511 of the belt 51. The processing waste and sludge filtered above are removed from the surface of the filter 4B by the rubber spatula 53 and dropped onto the belt 51. When the portion used in the filtration is positioned below by rotation, the coolant (primary treatment liquid) from above passes reversely to the time when it is above and is cleaned.

  Since the filtration device of the third embodiment does not require a configuration in which the primary treatment liquid and the secondary treatment liquid for backwashing are ejected to the filters 4A and 4B by the second supply means P2, the filtration male value 10 of the first embodiment is not required. Compared to the configuration, the configuration is simplified.

  The filter 4 </ b> A and the filter 4 </ b> B are affected by the size and arrangement of the rubber spatula 53, but are not necessarily arranged above the belt 51. Although the processing waste and sludge removed from the filter by backwashing are not carried by the belt 51, the processing scrap and sludge scraped off by the rubber spatula 53 do not flow down from the belt 51 due to the strong contact of the coolant with the belt 51. Is preferred.

  Further, a configuration in which the filter 4A, the filter 4B, and the belt 51 are not immersed in the coolant can be employed. Since the belt 51 is not immersed in the coolant, the power for moving the belt 51 is small.

(Embodiment 4)
The filtration device according to the fourth embodiment has substantially the same configuration and operational effects as the filtration device 10 according to the first embodiment. The following mainly describes the different parts.

  In the filtration device of the fourth embodiment, the driving and stopping of the first air drive pump P <b> 1 of the first supply unit 1 are reversed from the control by raising and lowering the float 84. In the filtration device of the fourth embodiment, the float 84 is floated on the coolant tank 100. Then, when the float 84 rises and the valve 842 comes into contact with the valve seat 851 and air no longer flows out from the discharge port 85, the control unit 86 is configured to introduce air into the first air drive pump P1. Switches (maintains) the air valve 12 to the introduction position. When the float 84 descends, the valve 842 does not come into contact with the valve seat 851, and air flows out from the discharge port 85, the control unit 86 is configured to block the introduction of air to the first air drive pump P1. Switch (maintain) the air valve 12 to the shut-off position. Since the control unit 86 can control by looking at the pressure difference of the air discharged from the connecting unit 83, it can be changed to switch (maintain) the air valve 12 with respect to the lifting and lowering of the float 86. . However, it is preferable to have some control and control, such as using another float so that the coolant in the filtration tank 3 is not lost.

(Other embodiments)
The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, the filtration device according to the first to fourth embodiments is not limited to being fixedly arranged at a certain place, and may be movable. If air that can serve as an air source can be secured, a mobile type filtration device can be used.If filtration is not always necessary, the filtration device can be moved to a place where there is a coolant that needs to be filtered. It is possible to evacuate so that it does not become. Further, since the filtration device itself can be moved for maintenance, it is possible to move only the device at an appropriate place where maintenance is easy.

  Further, the shape of the filter is not limited to a disk shape or a cylindrical shape. As the plate shape, a square filter, a polygonal shape, an elliptical shape, and the like, and a three-dimensional shape such as a spherical filter can also be used. In the case of a plate shape, the rotation direction is not limited to rotating in one direction with the axis direction passing through the center of the disk in the direction perpendicular to the surface as the rotation center. It rotates with the entire diameter in the direction perpendicular to the liquid surface as the center of rotation. In that case, when coolant is always injected to the filter, the surface of the filter is not parallel to the injection direction. For example, the filter rotates 180 degrees while the coolant is not injected or at regular intervals.

  In addition, the pilot valve 8 does not close the discharge port 85 when the float 84 rises, but closes the discharge port 85 when the float 84 rises and opens the float 84 as shown in FIG. It is also possible to adopt a configuration that does this.

10: Filtration device (filtration device using air-driven pump device), 100: Coolant tank,
1: 1st supply means (air drive pump device),
P1: first air drive pump, 12: air valve, 14: path member, 15: chamber,
151: lid,
P2: second supply means (second air drive pump) P2, 21: suction part, 22, 23: path member,
3: Filtration tank,
4, 4A, 4B: filter, 41: filtration part, 42: backwash part,
5: belt conveyor (discharge means), 51: belt, 52: stirring means, 521: brush,
522: Flexible shaft, 53: Rubber spatula,
6: Cyclone separator,
7: Removal tank
8: Pilot valve (air switching means),
81: Valve box, 82: Supply port, 83: Connection part, 84: Float, 841: Shaft part,
842: valve, 85: discharge port, 851: valve seat, 86 control unit.

Claims (5)

An air-driven pump that is driven by air supplied from an air source and moves the liquid to be treated from the tank to the filtration tank, and is located between the air source and the air-driven pump and introduces the air into the air-driven pump. An air valve capable of switching between an introduction position to be shut off and a shut-off position to shut off the introduction, a supply port for supplying the air from the air source to the valve box and the valve box, the valve box and the air valve are connected, and the air flows. A connecting portion and a float that floats on the water surface of the tank or the filtration tank and moves up and down according to a liquid level to change the discharge amount of the air to the connecting portion, and the introduction position of the air valve by the change in the discharge amount And an air switching means for switching the shut-off position,
A filter disposed in the filtration tank, for filtering processing waste and sludge in the liquid to be treated;
A second air-driven pump driven by the air supplied from the air source and returning the filtrate filtered by the filter from the filtration tank to the tank;
A discharge means that is driven by the air that can be supplied from the air source and that discharges the processing waste and sludge filtered in the filtration tank to the outside of the filtration tank;
A filtration device using an air-driven pump device. The second air driven pump further separates the processing waste and sludge not filtered by the filter from the filtrate returned from the filtration tank to the tank, and discharges the separated processing waste and sludge to the discharge means. Having a cyclonic separator,
The second air-powered pump, a filtration apparatus equipped with an air-driven pump unit according to the second filtrate by removing the further processing waste and sludge from the filtrate of the filtration tank in claim 1, returning to the tank. The filter has an air drive motor that rotates the filter by the air of the air source, and a filtration part that filters the liquid to be treated supplied to the filtration tank by the air drive pump device is changed by rotation. The filtration apparatus using the air drive pump device according to claim 1 or 2, wherein a portion used for filtration is appropriately washed. The filtration device using the air drive pump device according to any one of claims 1 to 3 , wherein the discharge means includes a belt and an air drive motor that rotates the belt by the air of the air source. The tank is provided with stirring means,
The agitation means is connected to the output shaft of the air drive motor, and when the air drive motor is driven, the agitation brush in the tank rotates to agitate the liquid to be treated in the tank. A filtration device using the air-driven pump device according to claim 4 .

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