JP2010017829A - Sludge separation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly drive a sludge separation apparatus when separating sludge containing predominantly powder from a liquid and powder mixture by driving the sludge separation apparatus. <P>SOLUTION: The sludge separation apparatus 1 includes: a storage tank 12 having a vertical axis 14 and storing a mixture 5 of liquid 3 and powder 4; a feed pump 23 which pressurizes and jets the mixture 5 through a jet nozzle 18 to turn the mixture 5 in a single direction A around the axis 14 in the storage tank 12; and a discharge pump 28 which sucks the mixture 5 in an internal bottom portion 12a of the storage tank 12 through a suction port 25 opened in the internal bottom portion 12a on the axis 14, and discharges the mixture 5 to the outside of the storage tank 12. In plan view (Fig.1), the plurality of jet nozzles 18 are provided in a circumferential direction around the axis 14. Each streamline 37 of the mixture 5 jetted from each of the jet nozzles 18, 18 passes through the vicinity of an outer edge portion of the suction port 25. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention separates sludge mainly composed of the above powder from a mixed liquid of a liquid such as a coolant used in a machine tool such as a grinding machine and a powder such as ground iron powder generated in the machine tool. The present invention relates to a sludge separation apparatus.

  Conventionally, the sludge separation apparatus is as shown in Patent Document 1 below. According to this publication, this sludge separation device has a longitudinal axis and is circular in plan view, and a storage tank for storing a liquid mixture of liquid and powder, and in this storage tank An opening nozzle that enables the liquid mixture to be sprayed, and pressurizing the liquid mixture and spraying the liquid mixture through the spray nozzle, thereby directing the liquid mixture in one direction around the axis in the storage tank. And a discharge pump for sucking the mixed liquid in the inner bottom through a suction port that opens to the inner bottom of the storage tank on the shaft and discharging the mixed liquid to the outside of the storage tank And has. Specifically, the liquid is a coolant used in a machine tool such as a grinding machine, and the powder is ground iron powder or abrasive grains generated by the machine tool.

  When the sludge separator is driven, the liquid mixture is swirled in one direction around the axis in the storage tank by the action of the injection nozzles. In this case, since the swirl speed is higher and the turbulent flow tends to occur actively on the large diameter side in the storage tank, the swirl is performed while the liquid and the powder are sufficiently mixed. On the other hand, since the swirl speed is slow on the small diameter side in the storage tank, the powder in the mixed solution tends to precipitate. As a result, sludge mainly composed of the powder is generated at the inner bottom of the storage tank in the vicinity of the axis of the storage tank.

Then, the sludge is sucked by the discharge pump through the suction port and discharged to the outside of the storage tank. That is, sludge is separated from the mixed solution. Thereby, the density | concentration of the powder in this liquid mixture is reduced, and the purity of the liquid is improved correspondingly. For this reason, this liquid can be reused.
Registered Utility Model No. 3055421

  By the way, in the prior art, the swirling speed of the mixed liquid is slowed down on the small diameter side in the storage tank due to the injection of the mixed liquid by the injection nozzle in the storage tank. Sludge is generated intensively at the inner bottom.

  However, in the conventional technique, the position of the streamline in a plan view of the mixed liquid ejected from the ejection nozzle is not considered. For this reason, during the driving of the sludge separator, a large amount of sludge may stay on the upper surface of the opening edge of the suction port at the inner bottom of the storage tank. In this case, a large amount of sludge is suddenly sucked into the discharge pump through the suction port, and an unnecessary excessive load is applied to the discharge pump or the associated pipe is clogged. There is a fear. These can prevent smooth operation of the sludge separator and are not preferable.

  The present invention has been made paying attention to the above-mentioned circumstances, and the object of the present invention is to separate sludge mainly composed of the above powder from a mixture of liquid and powder by driving the sludge separation device. In this case, the sludge separation device can be smoothly driven.

  Another object of the present invention is to make the configuration of the sludge separation device simpler.

The invention of claim 1 has a longitudinal axis 14, a storage tank 12 for storing the liquid mixture 5 of the liquid 3 and the powder 4, and an opening in the storage tank 12. An injection nozzle 18 that enables injection, and the mixed liquid 5 is pressurized and sprayed through the injection nozzle 18, so that the mixed liquid 5 is directed in one direction A around the axis 14 within the storage tank 12. The mixture 5 is sucked in the inner bottom 12a through the supply pump 23 that rotates and the suction port 25 that opens on the shaft 14 to the inner bottom 12a of the storage tank 12. In the sludge separation device provided with the discharge pump 28 for discharging to the outside of the tank 12,
In plan view (FIG. 1), a plurality of the injection nozzles 18 are provided in the circumferential direction around the axis 14, and each stream line 37 of the mixed liquid 5 injected from each of the injection nozzles 18, 18 is respectively connected to the inlet. 25 is a sludge separator characterized in that it passes through the vicinity of the outer edge of 25.

  The invention according to claim 2 is the sludge separator according to claim 1, wherein the heights of the two injection nozzles 18, 18 are different from each other.

  A third aspect of the present invention is the sludge separation apparatus according to the first or second aspect, wherein the supply pump 23 is also used as the discharge pump 28.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 has a vertical axis, a storage tank for storing a liquid mixture of liquid and powder, and an injection nozzle that opens in the storage tank and allows the liquid mixture to be injected. A supply pump that pressurizes the liquid mixture and injects the liquid mixture through the injection nozzle to turn the liquid mixture in one direction around the axis in the storage tank; and the storage on the axis In a sludge separation device comprising a discharge pump for sucking the mixed liquid in the inner bottom through a suction port that opens to the inner bottom of the tank and discharging the mixed liquid to the outside of the storage tank,
In plan view, a plurality of the injection nozzles are provided in the circumferential direction around the axis, and each streamline of the mixed liquid injected from each of the injection nozzles passes through the vicinity of the outer edge of the suction port. The following effects are produced.

  That is, when the sludge separator is driven, the liquid mixture is swirled in one direction around the axis in the storage tank by the action of each of the injection nozzles and the supply pump. In this case, since the swirl speed is higher and the turbulent flow tends to occur actively on the large diameter side in the storage tank, the swirl is performed while the liquid and the powder are sufficiently mixed. On the other hand, since the swirl speed is slow on the small diameter side in the storage tank, the powder in the mixed solution tends to precipitate. As a result, sludge mainly composed of the powder is generated at the inner bottom of the storage tank in the vicinity of the axis of the storage tank. In this case, the sludge is intensively generated particularly in the region surrounded by the streamlines and having a low turning speed.

  Here, as described above, each streamline passes in the vicinity of the outer edge of the suction port in plan view. For this reason, the sludge produced | generated intensively between each streamline as mentioned above substantially opposes the said suction inlet substantially. Therefore, the sludge to be generated at the inner bottom of the storage tank is immediately sucked into the discharge pump through the suction port and discharged outside the storage tank. That is, the sludge is prevented from staying at the inner bottom of the storage tank.

  As a result, during the operation of the sludge separator, a large amount of sludge is suddenly sucked into the discharge pump through the suction port, and an unnecessary excessive load is given to the discharge pump or the related pipe is clogged. It is prevented from being generated. For this reason, when the sludge mainly composed of the powder is separated from the liquid mixture of the liquid and the powder by driving the sludge separator, the sludge separator can be driven smoothly.

  In the invention of claim 2, the heights of the two injection nozzles are different from each other.

  For this reason, it is prevented that the liquid mixture injected from each injection nozzle mutually interferes in the said storage tank, and turning to the one direction of the liquid mixture in the said storage tank is achieved efficiently. Therefore, the separation of the sludge from the mixed solution is performed more effectively, and the driving of the sludge separation device is achieved more smoothly.

  In the invention of claim 3, the supply pump is also used as the discharge pump.

  For this reason, in the said sludge separation apparatus, compared with providing a supply pump and a discharge pump separately, the number of parts of the component of this sludge separation apparatus can be decreased. Therefore, the configuration of the sludge separator can be simplified.

  The present invention relates to a sludge separation device, and when the sludge mainly composed of the powder is separated from the liquid mixture of the liquid and powder by driving the sludge separation device, the sludge separation device can be driven smoothly. The best mode for carrying out the present invention in order to achieve the object is as follows.

  That is, the sludge separator has a longitudinal axis, a storage tank that stores a liquid mixture of liquid and powder, an injection nozzle that opens in the storage tank and that can inject the liquid mixture, A supply pump that pressurizes the liquid mixture and injects the liquid mixture through the injection nozzle to turn the liquid mixture in one direction around the axis in the storage tank; and the storage on the axis A discharge pump is provided for sucking the mixed liquid in the inner bottom through a suction port opened in the inner bottom of the tank and discharging the mixed liquid to the outside of the storage tank. In the plan view, a plurality of the injection nozzles are provided in the circumferential direction around the axis. Each stream line of the liquid mixture ejected from each ejection nozzle passes through the vicinity of the outer edge of the suction port.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a sludge separator. This sludge separation device 1 is composed of a mixture 5 of a liquid 3 such as a coolant used in a machine tool 2 such as a grinding machine and a powder 4 such as ground iron powder or abrasive grains generated in the machine tool 2. This is for separating the sludge 6 mainly composed of the powder 4.

  The sludge separation device 1 includes a primary separation device 9 for separating the sludge 6 from the mixed solution 5 on the upstream side (dirty side), and the sludge 6 is separated by the primary separation device 9. And a secondary separation device 10 for further separating the sludge 6 from the mixed solution 5 on the downstream side (clean side).

  The primary separation device 9 of the sludge separation device 1 includes a storage tank 12 that stores the mixed solution 5, and the storage tank 12 is supported on a work table that is a stationary member 13. The storage tank 12 has a longitudinal axis 14 and has a cylindrical peripheral wall 15 whose inner peripheral surface is circular in plan view (FIG. 1), and a lower end opening of the peripheral wall 15 is closed to be substantially horizontal. An extending bottom plate 16 is provided.

  A plurality of injection nozzles 18, 18 that can inject the mixed liquid 5 are provided on the inner bottom 12 a of the storage tank 12. Each of these injection nozzles 18 opens substantially horizontally in a tangential direction of an imaginary circle centered on the axis 14 and toward a circumferential direction A around the axis 14. These injection nozzles 18 and 18 are mutually the same shape and size. Moreover, these injection nozzles 18 and 18 are arrange | positioned at equal intervals in the circumferential direction around the said axis 14 by planar view (FIG. 1). More specifically, the pair of injection nozzles 18 and 18 are arranged symmetrically with respect to the axis 14. A supply pipe 19 that can supply the mixed liquid 5 into each of the injection nozzles 18 extends integrally upward from the base of each of the injection nozzles 18. Each of these supply pipes 19 is supported by the fixed side member 13 by a bracket 20.

  A supply pump 23 installed on the inner bottom 12 a of the storage tank 12 is provided on the shaft 14. The supply pump 23 includes a pump case 24 that constitutes an outer shell thereof, and an impeller (not shown) that is accommodated in the pump case 24. The supply pump 23 passes through a circular suction port 25 formed on the lower surface of the pump case 24 on the shaft 14, sucks and pressurizes the mixed solution 5, and supplies the mixed solution 5 to the supply pipes. 19 is supplied into each injection nozzle 18. Then, each of these injection nozzles 18 injects the liquid mixture 5 and turns the liquid mixture 5 in the storage tank 12 in one direction A around the axis 14. In the illustrated example, the mixed liquid 5 injected from one of the injection nozzles 18 and 18 is indicated by a one-dot chain line, and the mixed liquid 5 injected from the other injection nozzle 18 is indicated by a two-dot chain line. ing.

  The mixed solution 5 in the inner bottom portion 12a is sucked through the suction port 25 that opens to the inner bottom portion 12a of the storage tank 12 on the shaft 14, and the mixed solution 5 is passed through the upper portion of the storage tank 12 to the outside. A discharge pump 28 is provided for discharging. In this case, the supply pump 23 is also used as the discharge pump 28. Further, since the sludge 6 mainly composed of the powder 4 tends to stay in the inner bottom portion 12a as described later, the discharge pump 28 mainly sucks the sludge 6 out of the mixed solution 5. , And discharged to the outside of the storage tank 12.

  Above the storage tank 12, a magnetic separator 31 for removing iron powder and liquid 3 from the sludge 6 discharged by the discharge pump 28, and the sludge 6 after removing the iron powder and liquid 3 are provided. A recovery box 32 for recovery, a sludge supply pipe 33 that branches from the supply pipe 19 and supplies the sludge 6 from the discharge pump 28 (supply pump 23) to the magnetic separator 31, and the magnetic separator 31. A liquid feed pipe 34 is provided for feeding the mixed liquid 5 which is removed from the sludge 6 and contains some powder 4 to the secondary separator 10.

  In a plan view (FIG. 1), each stream line 37 of the mixed liquid 5 ejected from each ejection nozzle 18 passes through the vicinity of the outer edge which is the outer diameter of the suction port 25. That is, the virtual circle centered on the axis 14 described above substantially matches the outer diameter of the suction port 25. The heights of the two injection nozzles 18 are different from each other as shown in FIG.

  In addition, another spray nozzle 38 is juxtaposed with each spray nozzle 18. The mixed liquid 5 is also supplied to the base of each of the other injection nozzles 38 through the supply pipe 19, and each of the other injection nozzles 38 also injects the mixed liquid 5. The other stream lines 39 of the mixed liquid 5 ejected by each of these other ejection nozzles 38 extend in parallel at the same height as the stream line 37, and from the stream line 37 in the radial direction of the axis 14. Is also located near the outside. In addition to or in place of each of the other injection nozzles 38, another injection nozzle may be provided at a position slightly above each of the injection nozzles 18.

  When the primary separation device 9 of the sludge separation device 1 is driven, due to the action of each of the injection nozzles 18 and 38 and the supply pump 23, the storage tank 12 moves toward the one direction A around the axis 14. The liquid mixture 5 is swirled. In this case, since the swirling speed is higher and the turbulence tends to be actively generated on the large diameter side in the storage tank 12, the liquid 3 and the powder 4 are swirled in a sufficiently mixed state. It is done. On the other hand, since the turning speed is slow on the small diameter side in the storage tank 12, the powder 4 in the mixed liquid 5 tends to precipitate. As a result, sludge 6 mainly composed of the powder 4 is generated in the inner bottom portion 12 a of the storage tank 12 in the vicinity of the axis 14 around the storage tank 12.

  Then, the sludge 6 is sucked by the discharge pump 28 through the suction port 25 and discharged to the outside of the storage tank 12. That is, the sludge 6 is separated from the mixed solution 5. Thereby, the density | concentration of the powder 4 in this liquid mixture 5 is reduced, and the purity of the liquid 3 is improved correspondingly.

  The secondary separator 10 has the same configuration as the primary separator 9 and produces the same action. Therefore, each part of the secondary separation device 10 is denoted by the same reference numerals as those of the primary separation device 9, and the description thereof is omitted. Different configurations will be described below.

  The liquid mixture 4 that swirls around the large diameter portion of the storage tank 12 of the secondary separation device 10 has a low concentration of the powder 4. Therefore, the supply pump 23 of the secondary separation device 10 sucks the mixed liquid 5 that swirls the large diameter portion of the storage tank 12, while supplying the mixed liquid 5 to the injection nozzles 18 and 38. It is supposed to be injected.

  The suction port 25 is formed in the bottom plate 16 so as to open to the inner bottom portion 12 a of the storage tank 12. The suction port 25 is communicated with the suction side of the discharge pump 28 by a discharge pipe 42 extending downward from the bottom plate 16 of the storage tank 12. A cyclone 43 for centrifuging the powder 4 containing a little liquid 3 from the sludge 6 discharged from the discharge pump 28 and a recovery container 44 for recovering the powder 4 separated by the cyclone 43 are provided. . The liquid 3 discharged from the cyclone 43 is supplied to a cleaning device 45 for cleaning the bed and center of the machine tool 2. In addition, a distribution pump 47 is provided for sucking the mixed liquid 5 swirling the large-diameter portion of the storage tank 12 and distributing the mixed liquid 5 so as to be used as a coolant for the processing section 46 such as grinding of the machine tool 2. ing.

  According to the above configuration, the plurality of injection nozzles 18 are provided in the circumferential direction around the axis 14 in plan view (FIG. 1), and each streamline 37 of the mixed liquid 5 injected from each of the injection nozzles 18, 18. However, they pass through the vicinity of the outer edge of the suction port 25, and the following effects are produced.

  That is, as described above, when the sludge separation device 1 is driven, due to the action of each of the injection nozzles 18 and 38 and the supply pump 23, the storage tank 12 moves toward the one direction A around the axis 14. The liquid mixture 5 is swirled. In this case, since the swirling speed is higher and the turbulence tends to be actively generated on the large diameter side in the storage tank 12, the liquid 3 and the powder 4 are swirled in a sufficiently mixed state. It is done. On the other hand, since the turning speed is slow on the small diameter side in the storage tank 12, the powder 4 in the mixed liquid 5 tends to precipitate. As a result, sludge 6 mainly composed of the powder 4 is generated in the inner bottom portion 12 a of the storage tank 12 in the vicinity of the axis 14 around the storage tank 12. In this case, the sludge 6 is intensively generated particularly in an area surrounded by the stream lines 37 and 37 and having a low turning speed.

  Here, as described above, each streamline 37 passes in the vicinity of the outer edge portion of the suction port 25 in a plan view (FIG. 1). For this reason, almost the entire sludge 6 generated intensively between the streamlines 37 and 37 as described above faces the suction port 25. Therefore, the sludge 6 to be generated in the inner bottom portion 12 a of the storage tank 12 is immediately sucked into the discharge pump 28 through the suction port 25 and discharged to the outside of the storage tank 12. That is, the sludge 6 is prevented from staying in the inner bottom portion 12a of the storage tank 12.

  As a result, during the operation of the sludge separator 1, a large amount of sludge 6 is suddenly sucked into the discharge pump 28 through the suction port 25, and an unnecessary excessive load is given to the discharge pump 28, or the like. Clogging of the pipe is prevented. For this reason, when the sludge 6 mainly composed of the powder 4 is separated from the mixed liquid 5 of the liquid 3 and the powder 4 by driving the sludge separator 1, the sludge separator 1 is driven smoothly. be able to.

  Further, as described above, the heights of the two injection nozzles 18 are different from each other.

  For this reason, the mixed liquids 5 ejected from the respective spray nozzles 18 in the storage tank 12 are prevented from interfering with each other, and the mixed liquid 5 in the storage tank 12 is turned in one direction A. Efficiently achieved. Therefore, the separation of the sludge 6 from the mixed solution 5 is performed more effectively, and the driving of the sludge separation device 1 is achieved more smoothly.

  Further, as described above, the supply pump 23 is also used as the discharge pump 28.

  For this reason, in the said sludge separation apparatus 1, compared with providing the supply pump 23 and the discharge pump 28 separately, the number of parts of the component of this sludge separation apparatus 1 can be decreased. Therefore, the configuration of the sludge separator 1 can be simplified.

  Although the above is based on the illustrated example, the application of the sludge separation device 1 is not limited to the machine tool 2 but can be applied to an industrial machine or the like. Moreover, the sludge separation apparatus 1 may be comprised only by either one among the said primary separation apparatus 9 and the secondary separation apparatus 10, and may combine these each component variously.

  Further, the inner peripheral surface of the storage tank 12 is not limited to a circular shape, and may be a polygonal shape. Further, the bottom plate 16 of the storage tank 12 may have a normal or inverted conical shape, or may be inclined as a whole. Further, three or more spray nozzles 18 may be provided, and may be inclined slightly upward or downward from the base side toward the spray port. The suction port 25 may be an ellipse, an ellipse, or a polygon.

It is the whole plane simplification figure of a sludge separation device. It is the II-II sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sludge separator 2 Machine tool 3 Liquid 4 Powder 5 Mixture 6 Sludge 9 Primary separator 10 Secondary separator 12 Storage tank 12a Inner bottom part 13 Fixed side member 14 Axis 18 Injection nozzle 23 Supply pump 24 Pump case 25 Suction port 28 Discharge pump 37 Streamline A One direction

Claims (3)

A storage tank having a longitudinal axis and storing a liquid mixture of liquid and powder, an opening in the storage tank that enables the liquid mixture to be injected, and pressurizing the liquid mixture And a supply pump for turning the mixed liquid in one direction around the axis in the storage tank, and an opening at the inner bottom of the storage tank on the axis. In a sludge separator comprising a discharge pump for sucking the mixed liquid in the inner bottom through the suction port and discharging the mixed liquid to the outside of the storage tank,
In plan view, a plurality of the injection nozzles are provided in the circumferential direction around the axis, and each stream line of the mixed liquid injected from each of the injection nozzles passes through the vicinity of the outer edge of the suction port. A sludge separator characterized by.   The sludge separator according to claim 1, wherein the heights of the two injection nozzles are different from each other.   The sludge separator according to claim 1 or 2, wherein the supply pump is also used as the discharge pump.

Images