JP2015231644A - Sludge recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge recovery device capable of efficiently separating-removing sludge, by taking out a mixed fluid recovered in a tank to the outside of the tank from a required position of a bottom wall, by avoiding deposition of the sludge in a bottom part of a mixed fluid recovery tank.SOLUTION: A used working liquid discharged from a machine tool 5 is recovered to a mixed fluid recovery tank 1, but in the mixed fluid recovery tank 1, a recovered mixed fluid F flows by imparting turning directivity in one direction by a discharge flow discharged from a sludge separator 2. Thus, sludge mixedly existing in the mixed fluid is avoided in stagnating and depositing in a corner part of the bottom part periphery by forming a corner part of the bottom wall periphery of the mixed fluid recovery tank 1 as a gently continuing continuous surface, and by a turning flow of the mixed fluid F in this tank. Since a bottom wall surface becomes a downward pitch toward a current collection part from its periphery, the sludge is sucked from a fluid suction port 22 without precipitating-depositing on a tank inner bottom surface, and is filtered by the sludge separator 2, and the sludge mixedly existing in the mixed fluid F is separated-removed.

Description

  The present invention relates to a sludge collecting apparatus that separates and removes sludge mixed in machining fluid such as cutting oil or coolant used in cutting or grinding by a machine tool.

  Since the machining fluid used in the machine tool contains sludge such as metal chips, swarf, and abrasive grains, the sludge is separated by a mixed fluid separation device as disclosed in Patent Document 1, for example. The used machining fluid can be reused.

Japanese Patent Laid-Open No. 2007-978

  Most of the mixed fluid recovery tank for recovering the used machining fluid discharged from the machine tool, including the one used in Patent Document 1, is adjacent to the connecting corner formed by the bottom wall and the peripheral wall and in the circumferential direction. The connecting corner between the side walls is a right angle. For this reason, it cannot be denied that the mixed fluid stagnates in the corners around the bottom wall and sludge tends to accumulate, resulting in poor sludge recovery efficiency.

  Therefore, the present invention avoids the accumulation of sludge at the bottom of the mixed fluid recovery tank, and the sludge can be efficiently separated and removed by taking out the mixed fluid recovered in the tank from the required position of the bottom wall to the outside of the tank. A collection device is provided.

  The sludge recovery device of the present invention includes a mixed fluid recovery tank for recovering a used machining fluid used in a machine tool, and a sludge mixed in the mixed fluid by suctioning and filtering the mixed fluid in the mixed fluid recovery tank And a sludge separator that returns to the mixed fluid recovery tank.

  In the mixed fluid recovery tank, at least a continuous corner formed by the bottom wall and the peripheral wall is formed as a continuous continuous surface.

  A collecting portion of the mixed fluid is recessed in a required portion of the bottom wall, and a downward slope from the periphery to the collecting portion is set on the bottom wall surface.

  Then, while setting the fluid suction port of the sludge separator in the current collecting portion, the discharge flow flows along the peripheral wall of the mixed fluid recovery tank through the fluid discharge port of the sludge separator. The main feature is that the fluid is set at a position where swirl directivity can be imparted.

  With the above-described configuration, the used machining fluid discharged from the machine tool is recovered in the mixed fluid recovery tank, but the recovered mixed fluid is unidirectionally driven by the discharge flow discharged from the sludge separator in the mixed fluid recovery tank. Rotating directionality is imparted to the fluid.

  As a result, due to the fact that the corner around the bottom wall of the mixed fluid recovery tank is a continuous continuous surface and the swirling flow of the mixed fluid in this tank, the sludge mixed in the mixed fluid becomes a corner around the bottom. It is avoided that it accumulates in the part.

  Then, the mixed fluid in the tank is sucked into the sludge separator from the fluid suction port of the sludge separator at the collecting portion recessed in the bottom wall. At this time, the bottom wall surface descends from the periphery toward the collecting portion. Since it has a gradient, the sludge is sucked from the fluid suction port without being deposited on the bottom surface of the tank, and is filtered by the sludge separator and the sludge mixed in the mixed fluid is separated and removed.

  According to the present invention, not only can the mixed fluid stagnate in the corners around the bottom wall of the mixed fluid recovery tank and the sludge can be avoided, but also the sludge can be prevented from being deposited on the bottom surface of the tank. Can be taken out from the required position on the bottom wall to efficiently remove and remove sludge.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic plan explanatory drawing of the sludge collection | recovery apparatus which concerns on this invention. Expansive sectional explanatory drawing which follows the AA line of FIG. 1 which shows the arrangement | positioning relationship between a mixed fluid collection tank and a machine tool. The top view which shows a flow guide fin. The side view of the flow guide fin shown in FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  The sludge recovery device of this embodiment shown in FIGS. 1 and 2 includes a mixed fluid recovery tank 1, a sludge separator 2, a mixed fluid separator 3, and a pressure feed pump 4 that feeds a regenerated clean working fluid. It has.

  The mixed fluid recovery tank 1 is disposed below the machine tool 5 and collects the mixed fluid F of the used machining fluid used in the machine tool 5 and mixed with sludge such as chips, chips and abrasives. And accommodate.

  Below the mixed fluid F flowing out from the machine tool 5, a sludge discharge conveyor 6 is arranged obliquely upward from the inside of the tank to the outside of the tank so that the particle size mixed in the mixed fluid F is large. The sludge is coarsely captured and removed by the conveyor 6 and discharged out of the tank.

  The mixed fluid recovery tank 1 is made of a suitable synthetic resin having impact resistance. In the present embodiment, the main recovery tank 11 having a horizontally long rectangular shape and the one side of the main recovery tank 11 extending in the longitudinal direction are continuously provided. The sub-recovery tank 12 disposed below the mixed fluid outflow portion of the machine tool 5 has a flat T shape.

  The above-described conveyor 6 is disposed in the sub-recovery tank 12. In the example shown in FIG. 2, the bottom wall of the sub-recovery tank 12 is formed obliquely downward toward the main recovery tank 11. The mixed fluid from which the large sludge is removed flows into the main recovery tank 11.

  The corner formed by the bottom wall and the peripheral wall of the main recovery tank 11 and the corner between the side walls adjacent in the circumferential direction are all formed as a gentle continuous surface such as a curved surface so that the corner does not stagnate. ing.

  In addition, the current collecting portion 13 of the mixed fluid F is recessed in, for example, a central portion of the bottom wall of the main recovery tank 11, and a downward slope from the periphery to the current collecting portion 13 is set on the bottom wall surface.

  The sub-recovery tank 12 also has a corner formed by the bottom wall and the peripheral wall and a corner between the side walls adjacent in the circumferential direction as a smooth continuous surface such as a curved surface so that no stagnation occurs at the corner. Yes.

  The sludge separator 2 sucks and filters the mixed fluid F in the mixed fluid recovery tank 1 by, for example, a diaphragm pump (not shown), separates and removes sludge mixed in the mixed fluid F, and returns to the mixed fluid recovery tank 1. To do.

  The fluid suction port 22 of the sludge separator 2 is disposed in the current collecting portion 13 of the main recovery tank 11. The fluid suction port 22 is constituted by a pipe formed in a ring shape, and a plurality of slits 22a are provided in a staggered arrangement in multiple stages on the peripheral surface.

  The mixed fluid F sucked from the fluid suction port 22 flows into the sludge separator 2 via the suction side pipe 23 and is filtered by a special filter cloth (not shown), so that most of the sludge is separated and removed. The liquid is returned to the main recovery tank 11 through a fluid discharge port 25 provided on the peripheral wall of the main recovery tank 11 via a pipe line 24.

  The fluid discharge port 25 is provided at a position near the end of the short wall on the peripheral wall, and the mixed fluid F in the tank is surrounded by the discharge fluid flowing out along the adjacent long wall as the flow power as shown by an arrow a in FIG. The direction of flow is imparted by flowing in the direction.

  A shower pipe 26 is provided on the end side where the bottom wall of the sub-recovery tank 12 rises, and the discharge fluid introduced through the branch line 27 branched from the discharge side line 24 of the sludge separator 2 is illustrated. 2 is ejected as indicated by an arrow b, and the mixed fluid F that falls to the bottom of the sub-recovery tank 12 is pushed into the main recovery tank 11.

  The introduction switching of the discharge fluid to the fluid discharge port 25 and the shower pipe 26 described above is performed by controlling the electromagnetic valves 28A and 28B.

  At the corner around the bottom wall of the main recovery tank 11, it is arranged to intersect the flow direction of the mixed fluid F swirling along the peripheral wall of the main recovery tank 11, and flows along the corner around the bottom wall. A plurality of flow guide fins 14 for deflecting and guiding a part of the mixed fluid F to be directed toward the center of the main recovery tank 11 are provided.

  As shown in FIGS. 3 and 4, the flow guide fins 14 are formed in a substantially triangular shape on the side surface in which the upper edge is a downward slope toward the center side of the bottom wall of the main recovery tank 11, and is formed in a substantially S-shape in a plane. It is. Thereby, a part of the mixed fluid F flowing along the corner around the bottom wall of the main recovery tank 11 is received and swirled toward the center side of the main recovery tank 11 as shown by an arrow c in FIG. It is possible to guide the flow by rolling it up into a shape.

  The flow guide fin 14 is provided with a plurality of large and small through holes 15 that do not hinder the deflection guide in the flow direction, and prevents flow stagnation on the back side in the flow direction.

  Further, the flow guide fin 14 is provided with a substantially cylindrical rectifying protrusion 16 having a spherical end at the front end portion thereof.

  On one side in the length direction of the main recovery tank 11, a regenerated processing liquid storage unit 17 is provided to which the clean processing liquid regenerated by the mixed fluid separation device 3 is recirculated.

  The reclaimed machining fluid reservoir 17 is separated by a partition wall 18 having a height lower than the peripheral wall of the main recovery tank 11, and the regenerated clean machining fluid is supplied to the machine tool 5 by the high-pressure pump 4. The overflow is supplied to the processing section, and the overflow is passed over the partition wall 18 and returned to the main recovery tank 11. A gap is provided on the lower side of the partition wall 18 as shown by a virtual line in FIG. 2, so that the machining liquid in the main recovery tank 11 can be sucked when the suction amount of the machining liquid by the pressure feed pump 4 becomes insufficient. You may make it.

  The mixed fluid separator 3 recovers the mixed fluid F on the surface layer from the upper part of the collecting portion 13 of the main recovery tank 11, and separates the recovered mixed fluid F to regenerate the machining fluid, thereby regenerating the above-mentioned recycled machining fluid. It returns to the storage unit 17 and includes a float suction 31, a floating sludge separator 32, and a mixed fluid separator 33.

  The float suction 31 includes a movable portion 31b that moves following the liquid level change of the mixed fluid F by the float 31a and sucks the surface layer liquid, and a fixed portion 31c that supports the movable portion 31b, via the fixed portion 31c. The main collection tank 11 is disposed at the center of the current collecting portion 13.

  The mixed fluid separation device 3 sucks the surface liquid of the mixed fluid F in the main recovery tank 11 by the float suction 31 by driving a diaphragm pump (not shown), for example, and introduces it to the floating sludge separator 32 to remove the surface fluid. Filter through special filter cloth to separate and remove suspended sludge. The mineral fluid is separated and removed from the mixed fluid F from which the suspended sludge has been removed by the mixed fluid separator 33 to regenerate the machining fluid, and the clean machining fluid is returned to the regenerated machining fluid reservoir 17.

  The mineral oil separated by the mixed fluid separator 33 is collected in the waste oil tank 34.

  According to the present embodiment configured as described above, the used machining fluid discharged from the machine tool 5 flows out onto the conveyor 6 of the sub recovery tank 12 in the mixed fluid recovery tank 1 as shown by an arrow F in FIG. The large sludge having a granular shape mixed in the mixed fluid F is roughly captured by the conveyor 6 and discharged out of the tank.

  The mixed fluid F from which most of the sludge having a large particle diameter has been removed by the conveyor 6 flows into the main recovery tank 11 due to the inclination of the bottom of the sub-recovery tank 12, and the recovered mixed fluid F is sludge separator in the main recovery tank 11. As shown by the arrow a in FIG. 1, the swirl directivity is imparted in one direction by the discharge flow discharged from the two fluid discharge ports 25 and flows.

  Thereby, the corners around the bottom wall of the main recovery tank 11 and the corners between adjacent side walls of the peripheral wall are formed as a continuous surface that is gently curved and connected, and the swirling flow of the mixed fluid F in this tank Thus, sludge mixed in the mixed fluid F is prevented from being accumulated in the corners around the bottom wall.

  In particular, in this embodiment, a part of the mixed fluid F that swirls and flows is swirled toward the center of the main recovery tank 11 by the flow guide fins 14 disposed at the corners around the bottom wall of the main recovery tank 11. The sludge is effectively rolled up and stirred to prevent sludge accumulation at the corners around the bottom wall.

  Then, the mixed fluid F in the main recovery tank 11 becomes a vortex and gathers in the current collecting portion 13 provided in the center of the bottom wall, and from the fluid suction port 22 of the sludge separator 2 in the current collecting portion 13. It is sucked into the sludge separator 2.

  At this time, since the bottom wall surface of the main recovery tank 11 has a downward slope from its periphery toward the collecting portion 13, the mixed fluid F is sucked from the fluid suction port 22 without sludge being deposited on the bottom surface of the tank. The

  The mixed fluid F sucked and introduced into the sludge separator 2 is filtered by the sludge separator 2 so that the sludge mixed in the mixed fluid F is separated and removed, and the main recovery is performed from the fluid discharge port 25 as the power of the swirling flow as described above. It is discharged and refluxed into the tank 11.

  As described above, the mixed fluid F swirls and flows in the main recovery tank 11, and the mixed fluid F is sucked into the sludge separator 2 from the current collecting portion 13 at the center of the bottom wall. The floating sludge of the surface fluid of the mixed fluid F collects in a vortex, which is sequentially sucked by the float suction 31 of the mixed fluid separator 3 and separated and removed by the floating sludge separator 32.

  Then, the mixed fluid F from which the suspended sludge has been removed is introduced into the mixed fluid separator 33, and the mineral oil having a light specific gravity mixed in the processing liquid is separated and removed, and the regenerated processing liquid is stored in the regenerated processing liquid reservoir 17. To reflux.

  The regenerated clean machining fluid is supplied to the machining section of the machine tool 5 under high pressure by the pressure feed pump 4, and the used machining fluid is again collected in the mixed fluid collection tank 1 and the above-described circulation process is repeated. .

  As described above, according to the sludge recovery apparatus of the present embodiment, it is possible to prevent the mixed fluid F from stagnating at the corners around the bottom wall of the mixed fluid recovery tank 1 and to prevent the sludge from accumulating. Precipitation and accumulation can be avoided, and the mixed fluid F can be taken out of the tank from the collecting portion 13 set at a required position on the bottom wall, and sludge can be efficiently separated and removed by the sludge separator 2.

  Further, the mixed fluid F from which the sludge is separated and removed is discharged from the fluid discharge port 25 of the sludge separator 2 along the peripheral wall of the mixed fluid recovery tank 1 and flows in one direction to the mixed fluid F in the tank. Therefore, the power source for the swirl flow of the mixed fluid F can be effectively used, and a dedicated power source can be eliminated.

  In addition, in the present embodiment, a plurality of flow guide fins 14 are provided on the gentle continuous surface around the bottom wall of the mixed fluid recovery tank 1, and one of the mixed fluids F flowing along the corner around the bottom wall. The part is deflected toward the center side in the tank.

  Thereby, the mixed fluid F flowing along the corner around the bottom wall can be stirred, and sludge accumulation at the corner can be prevented more effectively.

  In particular, the flow guide fin 14 has a substantially triangular side surface with an upper edge descending toward the center side of the inner bottom wall of the tank, and is formed in a substantially S-shaped plane, so that one of the fluid mixture F flowing. The above-mentioned stirring action can be actively performed because the part is received and this is wound up in a spiral shape toward the center in the tank and flow-guided.

  Then, the mixed fluid F on the surface layer is recovered by the mixed fluid separation device 3 in the upper part of the collecting portion 13, and the processing fluid separated and regenerated is returned to the regenerated processing fluid storage portion 17 of the mixed fluid recovery tank 1. In order to ensure a clean and regenerated machining fluid, the machining fluid can be easily reused.

  In particular, the mixed fluid separator 3 includes a float suction 31 that sucks the surface liquid of the mixed fluid F, a floating sludge separator 32 that separates and removes the floating sludge from the suction surface liquid, and a mineral from the mixed fluid F that separates the floating sludge. A mixed fluid separator 33 that separates and removes oil and regenerates the processing liquid is provided, and the float suction 31 is disposed at the central position of the collecting portion 13.

  Thereby, the floating sludge of the surface fluid of the mixed fluid F is collected in a vortex shape above the collecting portion 13, sequentially sucked by the float suction 31, separated and removed by the floating sludge separator 32, and then by the mixed fluid separator 33. Since the machining fluid is regenerated, it is possible to regenerate clean machining fluid by thoroughly removing sludge. As described above, a long life of the machining liquid can be achieved by separating and collecting the mixed sludge by the sludge separator 2, separating and collecting the floating sludge by the floating sludge separator 32, and oil-water separation by the mixed fluid separator 33.

  In the above-described embodiment, the mixed fluid recovery tank 1 is illustrated as having a plane T shape, but may be arbitrarily formed, such as a plane square, an H shape, or a circle including an ellipse, depending on the type and model of the machine tool. it can.

  Moreover, although the case where the corner part around a bottom wall was formed as a curved surface was illustrated, this can also be formed as a slope.

  Furthermore, although the current collection part 13 is set to the bottom wall center position, it is not restricted to this, The formation position of the current collection part 13 can be arbitrarily set by specification.

DESCRIPTION OF SYMBOLS 1 ... Mixed fluid collection tank 2 ... Sludge separator 3 ... Mixed fluid separation apparatus 4 ... Pressure feed pump 5 ... Machine tool 11 ... Main collection tank 12 ... Sub collection tank 13 ... Current collecting part 14 ... Flow guide fin 17 ... Regenerated processing liquid Reservoir 22 ... Fluid suction port 25 ... Fluid discharge port 31 ... Float suction 32 ... Floating sludge separator 33 ... Mixed fluid separator 34 ... Waste oil tank

Claims (6)

A mixed fluid recovery tank for recovering used machining fluid used in machine tools;
A sludge separator that sucks and filters the mixed fluid in the mixed fluid recovery tank, separates and removes sludge mixed in the mixed fluid, and returns to the mixed fluid recovery tank;
The mixed fluid recovery tank is formed as a continuous continuous surface with a continuous corner formed by at least the bottom wall and the peripheral wall,
A concave portion of the mixed fluid collecting portion is provided at a required portion of the bottom wall, and a downward slope from the periphery to the collecting portion is set on the bottom wall surface,
While setting the fluid suction port of the sludge separator in the collecting portion,
The sludge recovery device, wherein the fluid discharge port of the sludge separator is set at a position where the discharge flow can flow in the circumferential direction along the peripheral wall of the mixed fluid recovery tank to give the turning directivity.   The mixed fluid recovery tank is arranged at the corner around the bottom wall of the mixed fluid recovery tank so as to intersect the flow direction of the mixed fluid swirling along the peripheral wall of the mixed fluid recovery tank, and flows along the corner around the bottom wall. The sludge recovery apparatus according to claim 1, further comprising a plurality of flow guide fins for deflecting and guiding a part of the mixed fluid toward the center of the mixed fluid recovery tank.   The flow guide fin is formed in a substantially triangular side surface with an upper edge descending toward the center side of the bottom wall of the mixed fluid recovery tank, and is formed in a substantially plane S shape, and has a corner around the bottom wall. The part of the mixed fluid that flows in the circumferential direction along the portion is received, and this is wound up in a spiral toward the center side of the mixed fluid recovery tank to enable flow guide. Sludge collection device.   The mixed fluid recovery tank recovers the surface mixed fluid from the upper part of the collecting part, separates the recovered mixed fluid, regenerates the processing liquid, and returns to the regenerated processing liquid storage part of the mixed fluid recovery tank. The sludge recovery apparatus according to any one of claims 1 to 3, further comprising a mixed fluid separator that recirculates. The mixed fluid separation device is arranged in a collecting portion of the mixed fluid recovery tank and moves following the liquid level change of the mixed fluid, and a float suction for sucking a surface layer liquid of the mixed fluid;
A floating sludge separator for separating and removing the floating sludge from the surface layer liquid of the mixed fluid sucked by the float suction;
A mixed fluid separator that separates and removes mineral oil from the mixed fluid from which the floating sludge has been separated and removed by the floating sludge separator, regenerates the processing fluid, and returns the fluid to the regenerated processing fluid storage section of the mixed fluid recovery tank; The sludge collection device according to claim 4, further comprising:   6. The mixed fluid recovery tank includes a pressure feed pump that sucks the regenerated machining fluid refluxed from the mixed fluid separator and supplies the regenerated machining fluid to the machining unit of the machine tool. The sludge collection apparatus as described in any one.