JP2013169534A - Screw conveyor and filtration device using air-driven pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw conveyor capable of preventing a failure of a device due to objects to be removed and separating the objects to be removed, and a filtration device using an air-driven pump using the screw conveyor and an air-driven pump not using electric power but using air as a power source.SOLUTION: A screw conveyer 5 includes: a conveying passage 51 wherein a mesh type dewatering means 513 to separate objects to be removed from a coolant (a liquid to be treated) containing mixed objects to be removed such as processing waste and sludge is attached in the lower part; and a screw 52 disposed rotationally in the conveying passage 51 to convey the objects to be removed in the liquid to be treated from one side to the other side by means of a spiral blade 521. The screw 52 is equipped with blockage prevention means 523 protruded in the diameter direction beyond the blade 521 and to solve blockage in the dewatering means 513.

Description

  The present invention relates to a filtration device using a screw conveyor and an 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 objects to be removed such as oil and processing waste. In order to remove the object to be removed from the liquid, a filtration device, a cleaning device, or the like 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, there is a case where a belt conveyor or the like is used as a method of removing the removal target object while moving the liquid to be processed. In the belt conveyor, there is a case where an object to be removed in the liquid to be processed enters the machine part and causes a failure.

  In addition, 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

  The present invention has been made in view of the above circumstances, and it is possible to avoid failure of the apparatus due to the object to be removed, and a screw conveyor that can separate the object to be removed, and an air drive that uses air instead of electric power as the screw conveyor and a power source. It is an object to be solved to provide a filtration device using an air-driven pump using a pump.

The structural feature of the invention according to claim 1 for solving the above problem is that a mesh-like dewatering means for leaving the removal target from the liquid to be removed mixed with the removal target such as processing waste and sludge is provided at the bottom. Attached transport route,
A screw that is rotatably arranged in the transport path, and that transports the object to be removed in the liquid to be treated from one to the other by a spiral blade;
Have
The screw protrudes in the radial direction from the blade, and has a blocking prevention means for eliminating clogging of the dehydrating means.

  Here, the liquid to be treated is a liquid in which processing waste is mixed with the liquid used in processing operations such as cutting and polishing, and the object to be removed is a solid other than liquid such as processing waste and sludge. is there.

  Further, the structural feature of the invention according to claim 2 is that, in claim 1, the blocking prevention means is located between the blades and the blades, and is located rearward with respect to the traveling direction of the blades. That is.

  A structural feature of the invention according to claim 3 is that, in claim 1 or 2, the blocking prevention means includes a coil spring that can be expanded and contracted in the radial direction, and a tip portion that is rounded.

According to a fourth aspect of the present invention for solving the above-described problem, an air drive that is driven by air supplied from an air source and moves liquid from a first predetermined location to a second predetermined location. A pump,
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 connecting portion for connecting the valve box and the air valve and through which the air flows, and the first predetermined place or the second A float that floats on the water surface at a predetermined location and moves up and down by a liquid level to change the amount of air discharged to the connecting portion, and the introduction position and the blocking position of the air valve are changed according to the change in the amount of discharge. Air switching means for switching,
An air-driven pump device that supplies the liquid to be treated to a filtration tank from a tank in which the liquid to be treated is stored;
A filter disposed in the filtration tank for filtering the removal object 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;
The screw conveyor according to claim 1, wherein the screw conveyor is driven by the air that can be supplied from the air source, and the removal object filtered by the filtration tank is discharged to the outside of the filtration tank;
It is to have.

Further, the structural feature of the invention according to claim 5 is the processing waste or sludge that is 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 that discharges the separated processing waste and sludge to the screw conveyor,
The second air drive pump returns the second filtrate obtained by further removing processing waste and sludge from the filtrate in the filtration tank to the tank.

  According to a sixth aspect of the present invention, in the fourth or fifth aspect, the filter includes an air drive motor that rotates the filter with air from the air source, and the air drive pump device. The filtration part for filtering the liquid to be treated supplied to the filtration tank is changed by rotation, and the part used for filtration is appropriately washed.

A structural feature of the invention according to claim 7 is that, in claim 6, 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. That is.

  In the invention according to claim 1, the dehydrating means is attached to the lower part of the transport path, and the removal target in the liquid to be treated that has flowed into the transport path is left and moved by the screw. The object to be removed is conveyed from one to the other by screw blades. The screw arranged in the conveyance path is provided with a spiral blade and a blocking prevention means, but the object to be removed does not adhere to them and the rotation of the screw is not hindered. Even if a part of the removal object passes through the dewatering means and falls downward from the transport path, the screw conveyor hardly affects the mechanism. The reason for this is that unlike the belt conveyor, the mechanical element that rotates the screw is not exposed downward or is not easily disposed below. Therefore, it is difficult to stop the rotation of the screw due to the removal object, and it is easy to avoid the failure of the apparatus. Therefore, the removal target can be stably separated from the liquid to be treated.

  Further, while the liquid to be processed passes through the transport path, the removal target is clogged by the dehydrating means, and the partial removal target is not carried by the blades, and the liquid to be processed may be difficult to dehydrate. The blocking prevention means protrudes in the radial direction from the blades, and can come into contact with an object to be removed that is not carried by the blades, thereby eliminating clogging.

  According to the invention which concerns on Claim 2, the blockage prevention means is buried by the removal target object conveyed by a blade | wing by positioning a blockage prevention means on the back side with respect to the advancing direction of a blade | wing, The state which cannot exhibit a function It can be avoided.

  In the invention according to claim 3, since the blocking prevention means can be expanded and contracted in the radial direction, when the blocking prevention means comes into contact with the dehydrating means, it can be expanded and contracted depending on the amount of the object to be removed. Further, the blocking prevention means is unnecessarily brought into contact with the inner wall of the transport path and is not easily worn or broken. Further, since the blocking prevention means has a tip portion with a rounded tip, it is difficult to catch on the mesh of the dehydrating means, and it is difficult to damage the dehydrating means and the inner wall of the transport path.

  In the invention according to claim 4, the air drive pump that moves the liquid from the first predetermined place to the second predetermined place is driven by air and introduces air into the air drive pump or shuts off the introduction of air. The switching air valve is done with air. 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 floats on the water surface at the first predetermined location or the second predetermined location 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 can 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 tank in the second predetermined place where the liquid has moved by the air driven pump. . 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. In addition, if the float floats in either the first predetermined place or the second predetermined place, the liquid may not necessarily be stored if the float is not installed.

  And a 1st air drive pump apparatus supplies a to-be-processed liquid in a tank to a filtration tank with air. The filtrate filtered by the filter of the filtration tank is returned to the tank by the second air drive pump, and the filtered processing waste and sludge are discharged from the filtration tank by the screw conveyor. The first air drive pump, the second air drive pump, and the screw conveyor are all driven by air supplied from an air source. Therefore, according to the invention which concerns on Claim 4, in order to filter the removal target objects, such as a processing waste and sludge, from a to-be-processed liquid, air is used instead of electric power as a power source, and industrial compressed air is used as a power source. It can be installed immediately in the factory that has it. In addition, the screw conveyor that discharges the object to be removed filtered in the filtration tank to the outside of the filtration tank is less likely to break down due to the object to be removed, and the object to be removed is discharged to the outside of the filtration tank while further dewatering in the transportation route. it can.

  The invention according to claim 5 further includes a cyclone separator that can separate and discharge the removal target from the filtrate filtered by the filter of the filter tank using the principle of cyclone. Therefore, according to the invention which concerns on Claim 4, in order to filter a process waste and sludge from a 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 6, 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 which concerns on Claim 6, since a filter is wash | cleaned suitably, to-be-processed liquid can be filtered, backwashing a filter. 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.

  The invention according to claim 7 further includes a 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 screw conveyor. When the air drive motor is driven, the stirring brush in the tank rotates to stir the liquid to be processed in the tank. That is, the liquid to be treated in the tank is agitated by air. According to the seventh aspect of the invention, since the liquid to be processed in the tank can be stirred by the stirring means, it is possible to prevent the object to be removed from precipitating and depositing in the tank, and to efficiently process the liquid to be processed. It can be filtered. 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 the structure of the filtration apparatus 10 of Embodiment 1 typically. (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 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 Embodiment 1. FIG. It is sectional drawing of the screw conveyor 5 used with the filtration apparatus 10 of Embodiment 1. FIG. It is explanatory drawing which looked at the obstruction | occlusion prevention means 523 arrange | positioned at the screw conveyor 5 from radial direction. It is a schematic diagram of a coil spring used in the blocking prevention means 523. 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 diagonally upward 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 screw conveyor according to the present embodiment is used in a filtration device (hereinafter referred to as “filtration device”) that uses an air-driven pump device for removing objects to be removed such as processing waste and sludge in the liquid to be treated. It is done. And the filtration apparatus concerning this embodiment is used in order to remove a removal target object 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 according to the first embodiment includes a coolant tank (tank) 100, a first supply unit (air-driven pump device) P1, a second supply unit (air-driven pump) P2, and a filtration tank. 3, a filter 4, a screw conveyor 5, a cyclonic 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. The coolant contains removal objects such as processing waste and sludge. In FIG. 1, the removal target object in the coolant tank 100 is not shown.

  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 screw conveyor 5 described later are set in the filtration tank 3.

  The filter 4 employs a disk-shaped wire mesh. The mesh opening (filtration accuracy) of the wire mesh 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 rotation direction A may be either clockwise or counterclockwise, is determined as appropriate, and is not particularly limited. As for the rotation of the filter 4, assuming that the rotation direction A 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 A is not a configuration that is 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 above the liquid level B, the part not immersed in the coolant liquid in the filtration tank 3 so that the coolant flowing into the filtration tank 3 can always flow in after passing through the filter 4. .

  As shown in FIG. 5, the screw conveyor 5 includes a case (transport route) 51, a screw 52, and an air drive motor 53. In the case 51, the screw 52 is disposed along the axial direction, an opening 511 through which coolant flows is formed on one side in the axial direction, and an opening 512 through which an object to be removed (almost no moisture) flows out on the other side. Is formed. A conveyor filter (dehydrating means) 513 is attached to the lower part of the case 51. As the size of the mesh of the filter, the filtration accuracy is comparable to that of the filter 4. The filtration accuracy is not necessarily the same as that of the filter 4. The screw 52 has an air drive motor 53 attached to one end of the shaft portion 521, and is disposed inside the case 51 except for one end connected to the air drive motor 53. The shaft portion 521 is rotatably supported at both end portions of the case 51 via bearings 54. In the screw 52, spiral blades 522 that protrude in the radial direction from the shaft portion 521 are formed almost entirely in the axial direction. The screw conveyor 5 conveys the coolant flowing in from the opening 511 to the opening 512 as the screw 52 rotates (the moving direction is indicated by an arrow C). Since the case 51 has the conveyor filter 513 at the lower part, the coolant is gradually dehydrated from the conveyor filter 513 while leaving an object to be removed in the liquid. By the time it reaches the opening 512, it is considerably dehydrated, but it is not completely dehydrated and is almost sludge.

  The screw 52 further has a blocking prevention means 523 that protrudes in the radial direction from the blade 522 from the shaft portion 521. The blockage preventing means 523 is arranged to be moderately dispersed on the rear side of the blade and on the surface of the shaft portion 521 with respect to the traveling direction of the blade. For example, it arrange | positions so that it may become plural in the axial direction at equal intervals, and one in the circumferential direction. As shown in FIG. 6, a plurality of coil springs 55 that can be expanded and contracted are arranged in one closing prevention means 523. As shown in FIG. 7, the coil spring 55 has a shape in which the tip 551 is bent inward in the spring expansion / contraction direction E, and the outer side is rounded.

  Returning to FIG. 1, in the screw conveyor 5, one opening 511 into which the coolant flows is immersed in the coolant in the filtration tank 3 below the filter 4. It gradually increases from one immersed in the coolant, and the other protrudes from the filtration tank 3. The other opening 512 is opened to discharge the removal object (including the coolant) to the removal object tank 7. In the screw conveyor 5, the removal object filtered by the filter 4 and the coolant that has passed through the filter 4 flow from the opening 511 and are wound up by the screw 52. Since the case 51 has the conveyor filter 513 at the lower part, the coolant flows down to the filtration tank 3 while leaving the object to be removed in the conveyor filter 513. The removal object is gradually conveyed to the other opening 512 by the blade 522 and discharged to the removal object tank 7. When the screw conveyor 5 is driven, the objects to be removed gradually accumulate like a lump in the mesh of the conveyor filter 513. The accumulated object to be removed is broken by the blocking prevention means 523. The removed countermeasures that have been crushed are transported by the blades 522 again.

  The 2nd supply means P2 pumps the primary processing liquid in the filtration tank 3 after passing the filter 4 to the cyclone separator 6 mentioned 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 processing liquid pumped by the second supply unit P <b> 2 is separated into an object to be removed and a liquid. The separated object to be removed is discharged to the screw conveyor 5 from below the cyclone separator 6. The screw conveyor 5 is formed with an opening 513 opened upward in the middle of the axial direction (below the cyclonic separator 6) separately from the one opening 511 so as to receive the separated object to be removed. . Then, the secondary treatment liquid from which the removal target has 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 101. As shown in FIG. 8, the stirring means 101 includes a brush 102 that is immersed in the coolant of the coolant tank 100 and a flexible shaft 103 that is connected to the brush 102. The other end of the flexible shaft 103 other than the one connected to the brush 102 is connected to a rotating shaft that rotates the screw 52. The rotating shaft to which the flexible shaft 103 is connected may be a rotating shaft that is rotated by an air driving motor of the screw conveyor 5 or a rotating shaft that is not directly rotated by the air driving motor. When the screw conveyor 5 is driven, the flexible shaft 103 rotates and the brush 102 connected to one end rotates. By rotating the brush 102, the object to be removed accumulated in the coolant tank 100, particularly at the bottom, is stirred, dispersed in the liquid, and easily sucked into the chamber 15 by the first supply unit 1. In the filtration device 10 of the first embodiment, even when the inside of the coolant tank 100 is not stirred by the stirring unit 101, the coolant is stirred by the momentum of the secondary processing liquid that is returned to the coolant tank 100 by the second supply unit P2. However, by adding the stirring means 101, the inside of the coolant tank 100 is further stirred, and the object to be removed is more dispersed 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), removal objects smaller than those in the first stage are removed. And the removal target object is removed so that coolant can be reused, returning the secondary processing liquid filtered twice to the coolant tank 100, and circulating. 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, it is possible to avoid the overflow of the coolant from the filtration tank 3 or the emptying of the filtration tank 3 due to the difference in capacity between the two pumps and the filtration processing capacity. 10 is considered. 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.

  Moreover, in the filtration apparatus 10 of this Embodiment 1, the removal target object discharged | emitted from the coolant of the filtration tank 3 and the cyclone separator 6 is conveyed to the removal thing tank 7 by the screw conveyor 5, and is discharged | emitted. Since the conveyor filter 513 is provided at the lower part of the case 51 of the screw conveyor 5, the moisture of the coolant drops below the conveyor filter 51, and the remaining removal target is conveyed to the opening 512 by the blade 522. . The clogging of the conveyor filter 51 is solved by the blockage preventing means 523 attached to the screw 52 coming into contact with the lump of the removal object causing clogging and breaking the lump. The blockage preventing means 523 is appropriately applied to the screw 52 with a plurality of coil springs 55 combined. When compared with the belt conveyor, the screw conveyor 5 is less likely to contact the coolant with the driving portion. Moreover, since the clogging of the net is also eliminated by the blocking prevention means 523, a failure such as the screw 52 being stopped can be avoided. Further, since the tip of the coil spring 55 is rounded, it is difficult to catch the mesh of the conveyor filter 51 and damage the inner wall of the case 51.

  In the filtering device 10 according to the first embodiment, the power source necessary for driving each component is air. 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 drives air as a power source.

(Second Embodiment)
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 removal object can be removed only by the filter 4 of the filtration tank 3 due to the type, size, and filter processing capacity of the removal object mixed in the coolant, the configuration as a filtration device is simple, and the device is also You can make it smaller.

  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 the type, size, and removal rate of the object to be removed must be considered, there is an advantage that the filtration time can be shortened compared to the case of removal via the cyclone separator 6.

(Third embodiment)
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.

  As shown in FIGS. 9 and 10, the filtration device of the third embodiment employs a cylindrical filter. Cylindrical filters 4A and 4B rotate about the axis direction as a rotation axis. As shown in FIGS. 9 and 10, the rotation direction D 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 direction C in which the coolant moves by the screw conveyor 5 will be described. FIG. 9 shows a case where the filtration tank 3 is viewed from the side. As shown in FIG. 9, the filter 4 </ b> A rotates in a direction in which the rotation axis is orthogonal to the coolant movement direction C. The rotation direction can be either clockwise or counterclockwise in FIG. In FIG. 9, it rotates counterclockwise.

  The coolant passes through the internal space of the filter 4A and flows downward from above the filter 4A. One end of the rubber spatula 56 is disposed between the upper side and the lower side of the filter 4 </ b> A and between the side on which the filter 4 </ b> A rotates, and the other end is disposed in the opening 511 of the screw conveyor 5. Therefore, the rubber spatula 56 is disposed above the screw 52 from the surface of the filter 4A. The removal object filtered above the filter 44 </ b> A is bald from the surface of the filter 4 </ b> A by the rubber spatula 56 and falls onto the screw 52 while holding the rubber spatula 56. When the upper part of the filter 4A rotates and is located at the lower side, the coolant (primary treatment liquid) from above is washed by passing in the opposite direction to the upper part and removed from the surface of the filter 4A by the rubber spatula 56. Things are removed.

  Next, the case where the filter 4B is set parallel to the direction C in which the coolant moves by the screw 52 by the screw 52 will be described. FIG. 11 shows a case where the filtration tank 3 is viewed obliquely from above. As shown in FIG. 11, the rotation direction B of the filter 4B is orthogonal to the coolant movement direction C. The filter 4B does not necessarily need to have a rotational direction orthogonal to the coolant moving direction. One end of the rubber spatula 56 may be set while rotating from the upper side to the lower side of the filter 4B, and the other end of the rubber spatula 56 may be disposed above the screw 52. The coolant passes through the internal space of the filter 4B from above the filter 4B and flows downward. The object to be removed filtered above the filter 4B is bald from the surface of the filter 4B by the rubber spatula 56 and falls onto the screw 52. When the upper part of the filter 4B rotates and is located at the lower part, the coolant (primary treatment liquid) from above is washed by passing in the opposite direction to the upper part and is not removed by the rubber spatula 56 from the surface of the filter 4B. Things are removed.

  The filters 4 </ b> A and 4 </ b> B are affected by the size and arrangement of the rubber spatula 56, but are not necessarily arranged above the screw conveyor 5. Although the removal object removed from the filter by backwashing is not easily carried by the screw 52, the removal object bald by the rubber spatula 56 is vigorously brought into contact with the case 51 and the screw 52, so that the removal object is boiled by the screw conveyor 5. It is preferable that it does not run off.

  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.

  Further, a configuration in which the filter 4A, the filter 4B, and the screw conveyor 5 are not immersed in the coolant can be employed. Since the screw 52 is not immersed in the coolant, the power for rotating the screw 52 can be somewhat reduced.

(Fourth embodiment)
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 management 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,
101: Stirring means, 102: Brush, 103: Flexible shaft,
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: Screw conveyor, 51: Case (transport route),
513: Conveyor filter (dehydration means), 52: Screw,
522: blade, 523: blocking means, 53: air drive motor, 55: coil spring,
56: Rubber Bella,
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 (7)

A transport path in which a mesh-like dewatering means for leaving the removal target from the liquid to be processed mixed with the removal target such as processing waste and sludge is attached to the lower part;
A screw that is rotatably arranged in the transport path, and that transports the object to be removed in the liquid to be treated from one to the other by a spiral blade;
Have
The screw conveyor is characterized in that it protrudes in a radial direction from the blades, and has a blocking prevention means for eliminating clogging of the dehydrating means.   2. The screw conveyor according to claim 1, wherein the blocking prevention unit is located between the blades and on the rear side with respect to a traveling direction of the blades.   The screw conveyor according to claim 1 or 2, wherein the blocking prevention means includes a coil spring that can be expanded and contracted in the radial direction and a tip portion that is processed into a round shape. An air-driven pump that is driven by air supplied from an air source and moves liquid from a first predetermined location to a second predetermined location;
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 connecting portion for connecting the valve box and the air valve and through which the air flows, and the first predetermined place or the second A float that floats on the water surface at a predetermined location and moves up and down by a liquid level to change the amount of air discharged to the connecting portion, and the introduction position and the blocking position of the air valve are changed according to the change in the amount of discharge. Air switching means for switching,
An air-driven pump device that supplies the liquid to be treated to a filtration tank from a tank in which the liquid to be treated is stored;
A filter disposed in the filtration tank for filtering the removal object 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;
The screw conveyor according to claim 1, wherein the screw conveyor is driven by the air that can be supplied from the air source, and the removal object filtered by the filtration tank is discharged 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 said 2nd air drive pump is a filtration apparatus using the air drive pump apparatus of Claim 4 which returns the 2nd filtrate which removed further processing waste and sludge from the said filtrate of the said filtration tank to the said 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 4 or 5, wherein a portion used for filtration is appropriately washed. 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 6.

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