JP4666624B2 - Liquid cyclone - Google Patents

Description

  The present invention relates to a liquid cyclone, and more particularly, to a liquid cyclone capable of suppressing foaming from a cleaning liquid after being centrifuged.

  Conventionally, as shown in FIG. 6, the liquid cyclone 10 intended to suppress foaming from the cleaning liquid includes a cylindrical portion 2 a and a conical portion 2 b that gradually decreases in diameter toward the lower side of the cylindrical portion 2 a. A main body 2, a treatment liquid inlet 2 c connected to the cylindrical portion 2 a, a foreign matter discharge port 2 d opened below the conical portion 2 b, an upper case 3 for temporarily storing a cleaning liquid, and a concentricity with the main body 2. And a liquid cyclone having an outlet pipe 4 connected to the upper case 3 disposed above the main body 2, and a gas-liquid separation pipe 9 having a large number of holes formed in the periphery at the upper end of the outlet pipe 4. It has been proposed (see, for example, Patent Documents 1 and 2).

The liquid cyclone 10 is used in a machine tool or the like, and a cylindrical fluid 2a is used for grinding fluid or cutting fluid (hereinafter referred to as “treatment fluid”) containing silicon or metal powder (hereinafter referred to as “foreign matter”). Is pumped at a predetermined flow rate from the processing liquid inlet 2c arranged in the tangential direction of the nozzle, and a swirling flow is generated. Foreign matter is discharged from the foreign matter outlet 2d opened below the main body 2 by centrifugal force. The removed cleaning liquid is caused to flow into the upper case 3 through the outlet pipe 4.
At this time, air is sucked from the lower foreign matter outlet 2d, and an air core is formed at the center of the swirl flow. The cleaning liquid surrounding the air core rises while swirling, and reaches the gas-liquid separation pipe 9 through the outlet pipe 4.

However, the swirling flow of the rising cleaning liquid becomes a radial flow through the mesh hole from the lower part to the upper part of the gas-liquid separation pipe 9, and the lower part is stronger and the upper part becomes weaker. It becomes a rotational flow toward the bottom surface → side wall surface → gas-liquid separation pipe 9 of the case 3, and the air after the gas-liquid separation discharged into the upper case 3 is taken into the cleaning liquid in part A of FIG. Even in the process of swirling and rising in the gas-liquid separation tube 9, there is a drawback that the fine bubbles are foamed from the cleaning treatment liquid by being discharged from the mesh holes together with the cleaning liquid.
JP 2003-210908 A Japanese Patent Laid-Open No. 2005-7212

  An object of the present invention is to provide a liquid cyclone capable of preventing air bubbles from being mixed into a cleaning liquid in view of the problems of the conventional liquid cyclone.

In order to achieve the above object, a liquid cyclone according to the present invention comprises a main body comprising a cylindrical portion and a conical portion that gradually decreases in diameter from below the cylindrical portion, a treatment liquid inlet connected to the cylindrical portion, and a lower portion of the conical portion. In the liquid cyclone comprising a foreign matter discharge port formed by opening, an upper case for temporarily storing a cleaning liquid, and an outlet pipe concentric with the main body and connected to the upper case disposed above the main body, the inner peripheral portion of the outlet pipe A cylinder with a larger diameter than the air core generated at the center of the swirling flow generated by the processing liquid introduced from the processing liquid inlet and a mesh-like peripheral surface is inserted from the upper case. It is characterized by that.

In this case, the cylindrical body has an upper case protrusion that protrudes from the outlet pipe into the upper case, and the outflow braking portion can be formed by an annular body that surrounds the upper case protrusion .

In addition, the inside of the outflow braking portion is made of a plate material having a hole through which the cylindrical body penetrates at the center, and a gap through which the cleaning liquid passes is formed between the cylindrical body and the annular body. A restraining plate that suppresses the rise can be disposed.

Moreover, the said cylinder can be extended to the lower end part vicinity of an exit pipe | tube.

  Moreover, the cross-sectional shape of the said cylinder can be made into the spiral line shape of a reverse direction with respect to the turning direction of a process liquid.

According to the liquid cyclone of the present invention, a gap between the outlet pipe inner periphery and a cylindrical body having a mesh surface is inserted from the upper case, so that the cleaning liquid and the air wick that rises while turning are inserted. Among them, the air core concentrated inside is introduced into the inside of the cylinder, and the cleaning liquid rises through the donut-like space formed by the outside of the cylinder and the inner surface of the outlet pipe with the mesh-like peripheral surface as a boundary, is turning in and out of the cylinder is maintained from entering into the case, it is possible to keep the air-core in the cylindrical body, it is possible to effectively prevent mixing of air into the cleaning liquid in the.

Further, by forming the outflow braking portion with an annular body made of an umbrella-like body or a cylindrical body that surrounds the protruding portion in the upper case protruding into the upper case, the cleaning liquid flowing into the upper case can flow when it exits the outlet pipe. It is possible to prevent air bubbles from being generated by being diffused with the air in the upper case without being suddenly opened.

In addition, by disposing a restraining plate that suppresses the rise of the liquid inside the outflow braking unit, the upward diffusion of the cleaning liquid flowing into the outflow braking unit of the upper case from the outlet pipe is suppressed, and further the bubble Occurrence can be effectively prevented.

  Further, by extending the cylindrical body to the vicinity of the lower end of the outlet pipe, the rising air core and the cleaning liquid can be separated from the vicinity of the inlet of the outlet pipe. Can be suppressed.

  Further, by making the cross-sectional shape of the cylinder a spiral line shape opposite to the swirl direction of the processing liquid, even if the air core at the center sways and protrudes from the cylinder, the bubbles swirl and open the opening M. Then, it is again introduced into the cylinder and swirled up, and gas-liquid separation is performed in the upper case.

  Hereinafter, embodiments of the hydrocyclone of the present invention will be described with reference to the drawings. In addition, about the structure similar to a conventional apparatus, the same code | symbol and a series of code | symbol are attached | subjected, and description is abbreviate | omitted.

FIG. 1-1 shows a first embodiment of the hydrocyclone of the present invention.
The hydrocyclone 1 includes a cylindrical body 6 whose peripheral surface is meshed from the upper case 3 with a gap in the inner peripheral portion of the outlet pipe 4 connected to the upper case 3, and the upper case of the cylindrical body 6. 3. The outflow braking portion 7a is formed by a mesh-like umbrella 7 surrounding the inner protruding portion.

The cylindrical body 6 may be configured by winding a mesh-like (metal mesh or the like) plate into a cylindrical shape, or may be a cylindrical body in which a perforated plate (such as punching metal) or a slit is formed. Then, the upper end of the cylindrical body 6 is fixed to the upper surface of the upper case 3 with a fixing means such as a bolt, and is attached to a pin 6 b concentric with the outlet pipe 4, and the lower end is inserted into the outlet pipe 4.
At this time, the cylindrical body 6 may be configured such that the upper end is opened without being attached to the pin 6 b and the umbrella 6 is supported in the upper case 3.

  Further, the insertion length of the cylindrical body 6 is not particularly limited as long as it slightly enters the inside of the outlet pipe 4, but it extends to the vicinity of the lower end portion of the outlet pipe 4 as in this embodiment. It is preferable. An air vent hole 6 a is drilled at the upper end of the cylinder 6 so as to open the bubbles above the upper case 3. The outer diameter of the cylindrical body 6 only needs to be larger than bubbles (hereinafter referred to as “air core”) that swirl on the inner surface of the main body 2 and rise together with the cleaning liquid after being separated from the foreign matter. As a result, the cleaning liquid located on the outer peripheral side with the air core as the center rises while turning around the donut-shaped space 4 a formed by the peripheral surface of the cylindrical body 6 and the inner surface of the outlet pipe 4. is there. Further, as shown in FIG. 5, the cylindrical body 6 may have a cross-sectional shape in a spiral line shape opposite to the swirl direction of the processing liquid. In this case, even if the air core at the center may sway and protrude from the cylinder, the bubbles are swirled and re-introduced into the cylinder 6 from the opening M and swirled and raised, and the gas and liquid are separated in the upper case. .

  The umbrella-like body 7 extends from an appropriate place on the circumferential surface of the cylindrical body 6 protruding into the upper case 3, is made of a mesh-like plate material that comes into contact with the lower surface 3 a of the upper case 3, and has a truncated cone shape. The umbrella-like body 7 is configured by winding a mesh-like plate in a truncated cone shape similarly to the cylindrical body 6, or a plate-like body in which a porous plate, a slit or the like is formed may be used after being transformed into a truncated cone shape. I do not care. The umbrella body 7 is fixed to the peripheral surface of the cylinder body 6 by an adhesive or welding means. When the upper end of the cylinder body 6 is opened and not attached to the pin 6b, the umbrella body 7 The cylindrical body 6 is kept concentric with the outlet pipe 4 via the umbrella-like body 7 by means of attaching means 3a-1 to the lower surface 3a of the upper case 3 and a distance maintaining piece 3a-2 with the side wall of the upper case 3. Constitute.

  Then, the outflow braking portion 7a formed by the umbrella 7 prevents the cleaning liquid flowing into the upper case 3 from being suddenly released, so that bubbles can be prevented from being generated.

  As described above, in this embodiment, the outflow braking portion 7a is formed by the annular body including the umbrella body 7 surrounding the cylindrical body 6 to prevent the generation of bubbles, but the generation of bubbles is small. When the cleaning liquid is a target, an annular body made of an umbrella 7 can be omitted as in the first modified example shown in FIG. 1-2 (the same applies to other examples). As a result, the structure of the apparatus can be simplified and the maintenance can be simplified.

  Further, the umbrella body 7 may be configured as a cylindrical tube body 70 including the upper plate 71 and the side plate 72 as in the second modified example shown in FIG. In the illustrated cylinder 70, both the upper plate 71 and the side plate 72 are mesh plates, but the upper plate 71 may be a non-porous plate. Further, as shown in FIG. 4, the outflow braking portion may be formed by a liquid reservoir annular body 75 having an open upper portion instead of the cylindrical body 70.

In the above configuration, as in the conventional example, the processing liquid containing foreign matter used in a machine tool or the like is pumped at a predetermined flow rate from the processing liquid inlet 2c disposed in the tangential direction of the cylindrical portion 2a, and the swirl flow The foreign matter is discharged from the foreign matter discharge port 2d opened below the main body 2 by centrifugal force, and the cleaning liquid from which the foreign matter has been removed rises while turning toward the outlet pipe 4 together with the air core. At this time, a cylindrical body 6 having a diameter larger than that of the air core is inserted into the outlet pipe 4, and the cleaning liquid and the air core are raised while swirling in the cylindrical body 6. The cleaning liquid ascends in a donut-shaped space 4a formed by the inner surface of the outlet pipe 4 while swirling. Since the swirling state of the cleaning liquid inside and outside the cylindrical body 6 exiting the outlet pipe 4 is maintained, the air core is gas-liquid separated at the mesh hole while being retained in the cylindrical body 6.
Most of the cleaning liquid rises while swirling the space 4 a and flows into the upper case 3 after passing through the outlet pipe 4, but the outflow braking portion 7 a is formed by the umbrella body 7 and the cylindrical body 70. Therefore, the cleaning liquid is not suddenly opened, and generation of bubbles can be suppressed.

FIG. 2 shows a second embodiment of the hydrocyclone of the present invention.
The hydrocyclone 1 has the same configuration as that of the first embodiment, and further suppresses the rise of the cleaning liquid flowing into the outflow braking unit 7a as a swirling flow from the outlet pipe 4 inside the outflow braking unit 7a. A plate 8 is arranged.

  The shape and material of the restraining plate 8 are not particularly limited, but a non-porous plate material is used, and a mesh plate, a perforated plate, a slit, etc. You may use the square board and circular board which formed this. And as shown in FIG.2 (b), it comprises with the square board which perforated the hole 8a which the cylinder 6 passes in the center, and it fixes to the inner peripheral surface suitable place of the umbrella-shaped body 7, and is comprised, It may be simply placed on the lower surface 3a of the case 3 with a little space. In this case, the restraint plate 8 is lifted by the upward flow rate of the rising cleaning liquid, and stops when the corners 8b and 8b which are opposite to the restraint plate 8 come into contact with the inner peripheral surface of the umbrella 7. , Suppress the rise of cleaning liquid.

In addition, when the annular body is constituted by the cylindrical body 70 as in the second modified example shown in FIG. 3, the restraining plate 8 is fixed to a suitable position on the inner peripheral surface of the side plate 72, and the diagonal of the restraining plate 8. A ring-shaped levitation stop plate 73 with which the corner portions 8b and 8b come into contact with each other may be disposed at a suitable place on the inner peripheral surface of the side plate 72.
As a result, most of the cleaning liquid in the outflow braking unit 7a first collides with the lower surface of the deterrence plate 8 in the lower chamber 7b below the deterrence plate 8 of the outflow braking unit 7a. 8 is formed above the suppression plate 8 from the clearance 8c between the hole 8a and the cylinder 6 and the arc-shaped clearance 8d formed between each side of the suppression plate 8 and the inner peripheral surface of the umbrella-shaped body 7. Flow into the upper chamber 7c.
At this time, if the material of the suppression plate 8 is a mesh plate, a perforated plate, a slit, or the like, the cleaning liquid also flows into the upper chamber 7c from the hole portion.

  Thus, when the restraining plate 8 is disposed inside the outflow braking portion 7a, after the cleaning liquid is released from the outlet pipe 4 to the upper case 3, the rise is further increased in the outflow braking portion 7a. Since the momentum can be suppressed, mixing of bubbles into the cleaning liquid can be effectively prevented.

  As mentioned above, although the liquid cyclone of the present invention has been described based on a plurality of embodiments, the present invention is not limited to the configurations described in the above embodiments, and the configurations are appropriately changed without departing from the spirit thereof. Is something that can be done.

  Since the liquid cyclone of the present invention can prevent bubbles from being mixed into the cleaning liquid, it can be used for a novel liquid cyclone. For example, a cylindrical body and an umbrella-like body are attached to an existing liquid cyclone. It can be used by remodeling.

It is sectional drawing from the front which shows 1st Example of the hydrocyclone of this invention. It is sectional drawing from the front which shows the 1st modification. The 2nd Example is shown, (a) is a partially cutaway sectional front view, and (b) is an XX sectional view of FIG. 2 (a). The 2nd modification example is shown, (a) shows a sectional front view with a part cutout, and (b) shows a YY sectional view of FIG. 3 (a). It is a cross-sectional front view of a partially cutaway showing a modification of the annular body forming the outflow braking portion. The modification of a cylinder is shown, (a) shows the sectional front view of a part notch, and (b) shows the ZZ sectional view of Drawing 2 (a), respectively. It is a front view of the partial cross section which shows the conventional liquid cyclone.

DESCRIPTION OF SYMBOLS 1 Liquid cyclone 2 Main body 2a Cylindrical part 2b Conical part 2c Treatment liquid inlet 2d Foreign substance discharge port 3 Upper case 3a Upper case lower surface 4 Outlet pipe 6 Cylindrical body 7 Umbrella body (annular body)
70 cylinder (annular)
75 annular body 7a outflow braking part 8 restraining plate

Claims (5)

A main body composed of a cylindrical portion and a conical portion that gradually decreases in diameter from below the cylindrical portion, a treatment liquid introduction port connected to the cylindrical portion, a foreign matter discharge port that opens below the conical portion, and a cleaning liquid temporarily In a liquid cyclone comprising an upper case to be stored and an outlet pipe concentrically with the main body and connected to the upper case disposed above the main body, a gap is formed in the inner peripheral portion of the outlet pipe and introduced from the processing liquid inlet. a larger diameter than the air core generated in the central portion of the swirling flow caused by the treatment liquid, and liquid cyclone, characterized in that the insertion of the peripheral surface meshed with the cylindrical body from the upper case. 2. The tubular body has an upper case protrusion protruding from the outlet pipe into the upper case, and an outflow braking portion is formed by an annular body surrounding the protrusion in the upper case. Liquid cyclone as described. The outflow braking portion is made of a plate material having a hole through which the cylindrical body penetrates in the center, and the liquid rises by forming a gap through which the cleaning liquid passes between the cylindrical body and the annular body. The hydrocyclone according to claim 2, further comprising a suppression plate to be suppressed. The hydrocyclone according to claim 1, 2 or 3 , wherein the cylindrical body is extended to the vicinity of the lower end portion of the outlet pipe. 5. The liquid cyclone according to claim 1, wherein a cross-sectional shape of the cylindrical body is a spiral line shape opposite to a swirl direction of the processing liquid.

Images