JP2013081893A - Foreign particle separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve removing efficiency of foreign particles in a fluid to be treated by using a low-cost and compact equipment.SOLUTION: A clarification system for the fluid to be treated includes a foreign particles separation device 1. The fluid to be treated is supplied from a dirty tank to the foreign particle separation device 1 and particles with comparatively small specific gravity or the like are discharged from a floating matter outlet 25 and foreign particles with large specific gravity j are separated by centrifugal force and is guided to a lower side of a cyclone separation part 11 by a by-pass flow channel 20. The fluid to be treated after separation of the foreign particles with large specific gravity j is further separated to the foreign particles j and clean fluid to be treated and these foreign particles j are discharged from an outlet 4. The fluid to be treated after clarification treatment is discharged out of the foreign particle separation device 1 via a cylindrical discharge pipe 6 and then is guided to a super clean tank.

Description

  The present invention relates to a foreign particle separation device used for separating and removing sludge (processing waste) generated during cutting or grinding in a machine tool or the like from a coolant liquid (processed fluid), Foreign matter particles provided with a cyclone type processing container for causing a fluid to be treated containing foreign particles to swirl down and flow along the inner peripheral surface, and to separate and discharge the foreign particles in the fluid to be treated by centrifugal force generated by the swirling and descending flow. The present invention relates to a separation device.

  The conventional foreign particle separation apparatus is formed in an inverted conical shape in which the inner peripheral surface of the cyclonic processing container is reduced in diameter toward the lower side, and is led into the container from the introduction opening of the upper side wall of the cyclonic processing container. By causing the coolant liquid to swirl and flow along the inner peripheral surface, the foreign particles are collected and separated in the vicinity of the inner peripheral surface by the centrifugal force. Then, by the upward flow generated in the swirling center portion with the swirling flow of the coolant liquid, the purified coolant liquid from which foreign particles are removed is discharged out of the container from the discharge pipe disposed in the swirling center portion. .

  In such a foreign particle separation apparatus, various techniques for separating and removing foreign particles more efficiently have been proposed. For example, the fluid purification system to be treated shown in Patent Document 1 includes two cyclonic processing vessels in series. After the foreign fluid particles are separated by supplying the fluid to be processed to the first cyclonic processing container and then separated into the second cyclonic processing container, the foreign particles are further separated. Such a structure is known that improves the purification rate of foreign particles in the fluid to be treated.

  Specifically, in Patent Document 1, the fluid to be treated is supplied from the dirty tank to the first cyclonic processing container, and the foreign particles are separated by centrifugal force and discharged from the discharge port. Fluid is led from the cylindrical discharge pipe to the second cyclonic processing vessel. In this second cyclonic processing container, foreign particles that could not be removed by the first cyclonic processing container are similarly separated by centrifugal force and discharged from the discharge port, and particles having a relatively small specific gravity, etc. Is discharged from the floating material discharge port, and the fluid to be treated after the purification treatment is guided from the cylindrical discharge pipe to the super clean tank.

JP 2011-83702 A

  In Patent Document 1, the fluid to be processed is supplied from the dirty tank to the first cyclone processing container, foreign particles having a large specific gravity are separated by centrifugal force and discharged from the discharge port. From the cylindrical discharge pipe to the second cyclonic processing vessel. In the second cyclonic processing container, foreign particles that could not be removed by the first cyclonic processing container are similarly separated by centrifugal force and discharged from the discharge port. The fluid to be treated, which is discharged from the floating object discharge port and subjected to the purification treatment, is led from the cylindrical discharge pipe to the clean tank. Accordingly, foreign particles can be separated and removed with a considerable purification rate, but there are problems that the installation of a plurality of cyclone processing containers is increased and the cost is increased. Further, the processing efficiency of the foreign particles in the cyclone processing container itself cannot be increased, and the fine foreign particles having a relatively low specific gravity cannot be separated and removed.

  The present invention has been made in view of the above points, and greatly improves the removal efficiency from a fluid to be treated even if the particles are minute foreign particles or foreign particles having a small specific gravity difference from the fluid to be treated. The purpose is that. Furthermore, it aims at making it obtainable with a low-cost and compact installation.

The first invention is
A cyclone in which the fluid to be treated containing foreign particles is swirled and lowered along the inner peripheral surface, and the foreign particles in the fluid to be treated are separated by a centrifugal force generated by the swirling and descending flow and discharged from the lower foreign particle discharge port. A processing container;
The cyclone type processing container has an opening that extends in the vertical direction at the center of the cyclone type processing container and that opens at the lower end inside the cyclone type processing container. A discharge pipe leading out of the processing container,
A foreign matter particle separation device comprising:
An inlet that is opened in the inner peripheral wall on the upper side of the cyclonic processing container and into which the fluid to be treated is swirled and introduced into the cyclonic processing container;
A projecting wall that projects from the inner peripheral wall toward the inner peripheral direction at a position below the inlet, and narrows the flow path of the fluid to be processed in the downward direction;
A cyclone separation part comprising a swirling cylindrical part provided extending from the protruding wall to the lower inner peripheral wall to a position below the opening of the discharge pipe;
A bypass flow path provided so as to bypass the swivel cylindrical portion of the cyclone separating portion and communicate the upper surface of the projecting wall and the lower end portion of the cyclone separating portion;
It has an inlet on the swiveling surface of the swivel cylindrical part, has an outlet on the lower end part of the cyclone separation part, and is provided radially outward and downward, and on the swivel surface side of the swirl cylindrical part A plurality of guide passage portions for guiding the foreign particles gathered in the downward direction;
It is characterized by having.

  As a result, a part of the foreign particles in the fluid to be treated which is introduced from the introduction port and swirls and moves downward moves to the outer peripheral side of the inner peripheral wall due to the influence of centrifugal force. Therefore, the recirculation cylindrical portion of the cyclone separation portion is bypassed through the inlet of the bypass flow path and sent to the lower end portion of the cyclone separation portion. Then, the fluid to be treated that has not passed through the bypass flow path is guided to the cyclone separation unit while flowing downward, and the foreign particles gradually move to the outer circumferential side as the fluid to be treated flows downward while swirling in the cyclone separation unit ( The possibility that foreign particles are mixed into the clean fluid to be treated on the inner peripheral side is reduced. In particular, since foreign particles are separated and removed by centrifugal force in advance before being guided to the cyclone treatment unit, foreign particles having a relatively large specific gravity in the fluid to be treated tend to be separated and removed by the bypass flow path. The fluid to be processed from which foreign particles having a large specific gravity have been removed is guided to the cyclone processing container. Therefore, in the cyclone treatment container, separation and removal are further promoted by centrifugal force in the fluid to be treated after gradually supplying foreign particles having a relatively large specific gravity, so that the purification rate of the foreign particles in the fluid to be treated is greatly improved. Can be realized with a simple configuration.

  According to a second aspect of the present invention, in the foreign particle separation apparatus according to the first aspect, the guide passage portion includes a groove portion.

  Thereby, the foreign particles collected on the outer periphery of the cyclone separation part can be efficiently separated.

  According to a third aspect of the present invention, in the foreign particle separation apparatus according to the first aspect, the guide passage portion includes a through passage.

  As a result, the foreign particles collected on the outer periphery of the cyclone separator can be reliably separated, and the foreign particles are reliably prevented from being mixed into the processed fluid discharged from the processed fluid discharge pipe after purification.

  According to a fourth aspect of the present invention, in the foreign particle separation apparatus according to any one of claims 1 to 3, a taper wall that gradually expands in a downward direction is formed on the swirling surface of the swirling cylindrical portion of the cyclone separating portion. And an inward wall extending from the lower end of the tapered wall toward the inner circumferential direction.

  Thereby, the foreign particle | grains in a cyclone isolation | separation part can be moved to a taper wall side, and can be made easy to isolate | separate.

  According to a fifth aspect of the present invention, in the foreign particle separation apparatus according to claim 4, the inlet of the guide passage includes the lower end of the tapered wall, and a part of the tapered wall and one of the inward walls. It is characterized by including a part.

  Thereby, the foreign particles collected on the lower end of the tapered wall can be effectively separated, and the separation of the foreign particles can be promoted.

  According to a sixth aspect of the present invention, in the foreign particle separation apparatus according to any one of claims 1 to 5, the upper surface of the bypass flow path is gradually deepened toward the inflow port provided on the upper surface. One inclined groove is provided in the circumferential direction.

  As a result, the foreign particles are smoothly guided to the inflow port, the separation and removal efficiency is improved, and a turbulent flow hardly occurs and a clean swirl flow is easily obtained.

  According to a seventh aspect of the present invention, in the foreign particle separation apparatus according to any one of claims 1 to 6, the swirling surface of the swirling cylindrical portion of the cyclone separating portion gradually moves toward the inlet of the guide passage portion. The second inclined groove that is deeper is provided in the circumferential direction.

  Thereby, the foreign particles are smoothly guided to the inlet, the separation / removal efficiency is improved, and a turbulent flow hardly occurs and a clean swirl flow is easily obtained.

  According to an eighth aspect of the present invention, in the foreign particle separation apparatus according to any one of claims 1 to 7, the lower end of the cyclone separation unit, the diameter of the lower portion increases toward a position facing the opening of the discharge pipe. A conical portion is formed.

  As a result, the foreign particles that have moved to the inner peripheral side of the cyclone separation part further move away from the inner peripheral wall to the outer peripheral side by centrifugal force, so that the foreign particles move away from the opening of the discharge pipe. The possibility of being caught in the discharge pipe can be kept low.

  According to a ninth aspect of the present invention, in the foreign particle separation apparatus according to any one of claims 1 to 8, a first spiral groove is formed on an outer peripheral surface of the discharge pipe facing the swirling surface of the swirling cylindrical portion. It is characterized by being.

  Thereby, it is possible to easily improve the removal efficiency of the foreign particles by applying a stronger centrifugal force to the foreign particles in the fluid to be treated.

According to a tenth aspect of the present invention, in the foreign particle separation apparatus according to any one of claims 1 to 9, the protrusion corresponds to a position between the inlet and the protruding wall, and a protrusion is formed on the outer peripheral surface of the discharge pipe. The second spiral groove is formed in the projecting portion, whereby a stronger centrifugal force is applied to the foreign particles in the fluid to be treated, so that the foreign particles having a large specific gravity are further increased in advance. It can be separated and the removal efficiency of foreign particles can be easily improved.

  An eleventh aspect of the present invention is the foreign particle separation apparatus according to any one of claims 1 to 10, wherein a bottom surface and a surrounding wall rising from the bottom surface are positioned below the discharge pipe and facing the opening. And the lower separation wall which consists of the discharge hole opened at the lower end of this enclosure wall is installed, It is characterized by the above-mentioned.

  As a result, the separated and removed foreign particles can be prevented from entering the discharge pipe from the opening, and the foreign particles entering the lower separation wall are also released by centrifugal force. Can be separated.

  A twelfth aspect of the invention is the foreign particle separation apparatus according to any one of claims 1 to 11, wherein at least one of a flow rate and a pressure is adjusted to at least one of the downstream side of the discharge pipe and the downstream side of the discharge port. A valve is provided.

  As a result, the flow rate and flow rate of the fluid to be processed and the centrifugal force acting on the foreign particles in the fluid to be processed are adjusted in the cyclone processing container so as to match the specific gravity of the foreign particles, thereby enhancing the foreign particle removal effect. Can be easily done.

  Thereby, the turning speed of the fluid to be treated can be increased, and a stronger centrifugal force can be applied to the foreign particles.

  A thirteenth aspect of the present invention is the foreign particle separation apparatus according to any one of claims 1 to 12, wherein the cyclone type processing container has a cyclone type processing container at a position above the position where the inlet for the fluid to be processed is provided in the cyclone type processing container. A floating object discharge port is provided for collecting and discharging the floating object that has floated on the top of the surface.

Thereby, the levitated matter with small specific gravity contained in a to-be-processed fluid can also be removed by discharging | emitting from a levitated matter discharge port.

  According to the present invention, the removal efficiency from the fluid to be processed can be reduced even if the particles are particularly fine foreign particles present in the center of the cyclonic processing container or the like, or foreign particles having a small specific gravity difference from the fluid to be processed. It can be easily improved greatly. In particular, the removal efficiency of foreign particles from the fluid to be processed can be greatly improved with a compact configuration.

1 is an overall view illustrating a configuration of a processing target fluid purification system according to a first embodiment. It is a longitudinal cross-sectional view which shows the structure of the foreign particle separation apparatus of Embodiment 1. It is the longitudinal cross-sectional view which made the cross section of the foreign particle separation apparatus of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. FIG. 3 is a partial plan view of an inflow port of the bypass channel according to the first embodiment. 2 is a partial cross-sectional view of an inflow port of a bypass channel according to Embodiment 1. FIG. 3 is a plan view of a support plate of Embodiment 1. FIG. It is a longitudinal cross-sectional view which shows the structure of the foreign material particle separation apparatus of Embodiment 2. It is the longitudinal cross-sectional view which made the cross section of the foreign particle separation apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each of the following embodiments, components having functions similar to those of the other embodiments are denoted by the same reference numerals, and description thereof is omitted as appropriate.

Embodiment 1 of the Invention
FIG. 1 shows a processing fluid purification system 100 according to Embodiment 1 of the present invention. In this embodiment, as an example, the processing fluid purification system 100 is used to purify a coolant liquid (processing fluid) of a machine tool 101. An example applied to the system is shown.

  That is, the fluid to be treated purification system 100 includes, in the machine tool 101, cutting chips made of chips mixed in a coolant liquid (that is, fluid to be treated) or a fusion of the chips and abrasive grains. This is applied to the case where the foreign particle j containing the liquid and the coolant liquid are separated, and the foreign particle j is separated and recovered. More specifically, the fluid purification system 100 to be treated includes a dirty tank 102, a foreign particle separation device 1, a dust separation tank 103, a conveyor type dust separation device 108, and a super clean tank 104. ing.

  The dirty liquid discharged from the machine tool 101 (the fluid to be processed before removing the foreign particle j) is first guided into the dirty tank 102 and stored. The fluid to be processed stored in the dirty tank 102 is pumped up by the pump 105 and guided to the foreign particle separation apparatus 1.

  In the foreign particle separation apparatus 1, as will be described in detail later, the foreign particles j having a relatively large specific gravity are discharged from the discharge port 4 to the dust separation tank 103 through the bypass channel, and the foreign particles j are separated. The treated fluid after the purification treatment is discharged from the cylindrical discharge pipe 6 and guided to the super clean tank 104.

  When the foreign particle j discharged from the discharge port 4 circulates downward from the right side of the baffle plate 282 in the dust separation tank 103 and settles on the bottom of the dust separation tank 103, it is collected by the dust separation device 108. And discharged to the dust box 107. The dust separation device 108 has a known structure shown in, for example, Japanese Patent Application Laid-Open No. 2003-251542, and the description thereof is omitted here. When the water level of the upper layer in the dust separation tank 103 reaches a predetermined water level h1, the fluid is returned from the discharge port 103d to the dirty tank 102 via the return pipe 103b and again to the foreign particle separation apparatus 1. It is guided.

  On the other hand, the clean fluid to be treated after the removal of foreign particles, which is guided and stored from the cylindrical discharge pipe 6 of the foreign particle separation apparatus 1 to the super clean tank 104, is supplied to the machine tool 101 by the pump 115, and is supplied as a coolant liquid. Used as. Here, when the water level reaches the predetermined water level h2, the fluid to be treated in the super clean tank 104 goes under the partition wall 104f suspended from the upper wall portion 104a and rises between the side walls to return pipe. 104b is returned to the dirty tank 102. The partition wall 104f is formed with a floating material discharge hole 104c at the same height as the return pipe 104b. It is returned to the tank 102. Here, by appropriately setting the size of the floating matter discharge hole 104c, the floating matter is surely discharged, and a flow around the lower part of the partition wall 104f is secured, so that the settled dust is also reliably discharged. You can make it. Along with this flow, the dust that has not been removed by the foreign particle separation apparatus 1 and has settled in the super clean tank 104 is returned to the dirty tank 102. As shown in FIG. 1, a partition wall 104e whose lower end is lower than the partition wall 104f is provided closer to the suction port side of the pump 115 than the partition wall 104f, so that the floating object is more difficult to be sent to the machine tool 101. Good. With the configuration as described above, accumulation of dust and levitated matter in the super clean tank 104 can be suppressed as much as possible, so that it is easier to supply clean liquid to the machine tool 101 at all times, and the machine tool 101 can be operated. It can be used continuously without stopping.

-Configuration of foreign particle separation apparatus 1-
As shown in FIGS. 2 and 3, the foreign particle separator 1 includes a cyclonic processing container 2 made of a nonmagnetic material such as stainless steel, aluminum, or resin, and a fluid to be treated after purification in the cyclonic processing container 2. Is discharged from the cyclone processing container 2 (outside the foreign particle separator 1). The discharge pipe includes a cylindrical discharge pipe 6 provided at the center of the cyclonic processing container 2 and extending in the vertical direction, and a cylindrical discharge pipe extension 7 screwed into the lower end of the cylindrical discharge pipe 6. . The cylindrical discharge pipe 6 and the cylindrical discharge pipe extension 7 communicate with the inside and outside of the cyclonic processing container 2, so that the clean fluid to be processed in the cyclonic processing container 2 is removed from the cyclonic processing container 2. It is configured to lead to (outside the cyclone separation / removal device 1).

  The cyclonic processing container 2 is constituted by a substantially cylindrical main body 2a whose upper end is closed and a substantially cylindrical fluid vortex 2b connected to the lower end of the main body 2a. The cyclone type processing container 2 has an inner peripheral surface 2h extending in the vertical direction, a swiveling cylindrical portion 2c, a swirling cylindrical portion 2d, a cylindrical portion 2e, an inverted conical portion 2f, a conical portion 2g, and an inverted conical portion. As will be described later, the fluid to be treated including the foreign particle j is swirled along the inner peripheral surface 2h to separate the foreign particle j by its centrifugal force. .

  More specifically, the swivel cylindrical portion 2c formed at the upper end portion of the inner peripheral surface 2h of the cyclone type processing container 2 has a conical portion 2c1 above the introduction port 3 and an inverted portion continuous to the conical portion 2c1. Consisting of the conical portion 2c2, light things such as oil are guided upward, and heavy things are easily guided downward. The swivel cylindrical portion 2c is formed as a separate body and is fitted into the inner peripheral surface of the main body portion 2a. The surface of the swivel tubular portion 2c is subjected to a wear-resistant surface treatment such as nitriding treatment or heat treatment. Has been replaced. A swivel cylindrical part 2d having an inner diameter smaller than that of the swivel cylindrical part 2c is provided on the lower side of the swivel cylindrical part 2c, and the swirl descending flow flowing inside the swivel cylindrical part 2d Separation into foreign particles j gathering on the outer peripheral side (swivel surface side) of the swirling cylindrical portion 2d and clean processing liquid gathering on the inner peripheral side is performed. A cylindrical portion 2e whose inner diameter is substantially constant over the entire vertical direction is provided below the swiveling cylindrical portion 2d, and an inverted conical portion 2f is formed below the cylindrical portion e. A conical portion 2g is formed below the inverted conical portion 2f, and an inverted conical portion 2f is formed below the conical portion 2g. The axial centers of the swivel cylindrical portions 2c, 2d, the cylindrical portion 2e, the inverted conical portion 2f, the conical portion 2g, and the inverted conical portion 2f are coincident with each other, and this axial center is the center of the cyclone processing vessel 2 The axis is 1C. The central axis 1C substantially coincides with the turning central axis of the fluid to be processed. The turning cylindrical portion 2c and a part of the turning cylindrical portion 2d are the inner peripheral surface of the main body portion 2a, and the remainder of the turning cylindrical portion 2d, the cylindrical portion 2e, the inverted conical portion 2f, and the conical shape. The part 2g and the inverted conical part 2f are the inner peripheral surface of the fluid vortex part 2b.

  As shown in FIG. 4, the revolving cylindrical portion 2 c is formed with an introduction port 3 for introducing a fluid to be processed into the cyclone type processing container 2. The introduction port 3 opens from the tangential direction to the swivel cylindrical portion 2c and opens the fluid to be processed flowing from the opening into the cyclone processing container 2 through the central axis ( 4 is configured to swirl in the counterclockwise direction (r) in FIG. 4 around the central axis 1C of the cyclonic processing container 2 (note that the cross section shown in FIGS. 2 and 3 is actually introduced). The mouth 3 does not appear, but in FIG. 2 and FIG. 3, for convenience, it is shown at a position projected on the cross section of the same figure. Thus, the fluid to be treated is swirled in the counterclockwise direction in the swirling cylindrical portion 2c, and thus swirled in the same direction (counterclockwise direction) in the fluid vortex portion 2b. Needless to say, for example, the fluid to be treated may be swung in the clockwise direction according to the position of the introduction port 3.

  A cylindrical discharge pipe 6 extending in the vertical direction and a cylindrical discharge pipe extension 7 screwed to the lower end of the cylindrical discharge pipe 6 are disposed at the center of the cyclonic processing container 2. The cylindrical discharge pipe 6 and the cylindrical discharge pipe extension 7 communicate with the inside and outside of the cyclonic processing container 2 so that the clean fluid to be treated in the cyclonic processing container 2 is removed from the cyclonic processing container 2 (foreign matter particles). It is configured as a discharge pipe leading to the outside of the separation device 1). More specifically, the cylindrical discharge pipe 6 passes through the upper wall portion (the upper end portion of the main body portion 2a) of the cyclonic processing container 2 and goes out of the cyclonic processing container 2 (outside the foreign particle separation apparatus 1). It is extended. The screwed portion between the cylindrical discharge pipe 6 and the cylindrical discharge pipe extension 7 is set at a position below the inlet 3 for introducing the fluid to be processed into the cyclone processing container 2 and has an outer diameter of the inlet. The bulging part 7a larger than the position 3 is formed, and the foreign particle j having a relatively large specific gravity is easily moved in the outer peripheral direction. Further, a first spiral groove 71 is formed on the outer periphery of the bulging portion 7a, and the swirling speed of the fluid to be treated is increased so that a stronger centrifugal force is applied to the foreign particle j. In addition, the cyclone separating unit 11 is more reliably moved to the outer peripheral side. The taper angle with respect to the central axis 1C in the upper and lower portions of the bulging portion 7a is set to 45 °, for example. The first spiral groove 71 is formed with two leads having a lead angle of 30 °. Here, the direction of the first spiral groove 71 (right screw direction or left screw direction) may be determined according to the direction of the swirl flow, for example.

  A constricted portion 7 b is formed below the bulging portion 7 a in the cylindrical discharge pipe extension portion 7. Under the constricted portion 7b, an enlarged diameter portion 7c having an outer diameter slightly larger than that of the constricted portion 7b is formed. A second spiral groove 72 is formed on the outer periphery of the enlarged diameter portion 7c to increase the swirling speed of the fluid to be treated, and to apply a stronger centrifugal force to the foreign particle j. It moves to the outer peripheral side of the cyclone separation part 11 more reliably. The second spiral groove 72 has two leads formed with a lead angle of 30 °. Here, the direction (second screw direction or left screw direction) of the second spiral groove 72 may be determined according to the direction of the swirl flow, for example. The constricted portion 7d is provided again below the enlarged diameter portion 7c, the enlarged diameter portion 7e is provided again below the constricted portion 7d, and the inclined reduced portion 7f is formed below the enlarged diameter portion 7e. Has been. That is, for example, the average diameter in the cross section of the flow path of the fluid to be treated is increased in diameter at the bulged portion 7a of the cylindrical discharge pipe extension 7 and reduced in diameter at the constricted portion 7b, and the expanded diameter portion 7c. The diameter is expanded again at the portion, the diameter is reduced again at the constricted portion 7d, and the diameter is expanded again at the enlarged diameter portion 7e. And the flow toward the inner side is promoted by the inclination reducing portion 7f.

  As will be described later, the clean fluid to be treated from which the foreign particles j have been removed passes from the fluid discharge port 7h through the cylindrical discharge pipe extension 7 and the cylindrical discharge pipe 6 to the outside of the cyclone separation and removal apparatus 1. It is guided. In addition, the inner peripheral surface of the lower end portion of the cylindrical discharge pipe extension portion 7 provided with the fluid discharge port 7h is provided with a guide inclined portion 7g having a diameter slightly increased outwardly, so that the fluid is more smoothly fluidized. It is led to the discharge port 7h.

  A protruding wall 9 that protrudes from the inner peripheral wall toward the inner peripheral direction is provided near the outer periphery of the lower end portion of the swiveling cylindrical portion 2c (a position below the introduction port). A partition wall 9b is provided on the inner peripheral upper side of the protruding wall 9 in order to prevent the foreign particles j having a relatively large specific gravity that moves rapidly to the outer peripheral side by centrifugal force from approaching the inner side. The projecting wall 9 narrows the flow path of the fluid to be treated in the downward direction, the swirling flow radius of the fluid to be treated is reduced, and a large centrifugal force acts on the foreign particles j in the fluid to be treated. Yes. Below the projecting wall 9, a cyclone separating part 11 having a swiveling cylindrical part 2d is provided. A taper wall 13 continuous from the inner diameter of the protruding wall 9 is provided on the turning surface of the turning cylindrical portion 2d. The tapered wall 13 is formed at a slight inclination angle of 4 to 8 ° and is about 2/3 of the length of the swiveling cylindrical portion 2d. A substantially horizontal inward wall is formed at the lower end of the tapered wall 13. 14 is provided extending in the inner circumferential direction. A guide passage portion 16 having an inlet 16a from the lower end portion of the tapered wall 13 to the inward wall 14 and having an outlet 16b on the lower end surface 11a of the cyclone separating portion 11 is formed as an inclined groove radially outward and downward. Has been. As shown in FIGS. 6 and 7, the second inclined groove 22 that gradually becomes deeper toward the inlet 16a of the guide passage portion 16 has the tapered wall 13 and the inward wall 14 (that is, the turning of the turning cylindrical portion 2d). (Surface) is provided in the circumferential direction so that the swirling fluid to be processed j can easily enter the inlet 16a. The inclination angle of the second inclined groove 22 is about 4 to 8 °, and the length of the second inclined groove 22 is preferably about 2 to 5 times its width. In addition, although the guide channel part 16 is provided linearly, it is good also as a guide channel inclined in the circumferential direction according to the direction of the swirl flow. The fluid to be treated guided between the taper wall 13 and the cylindrical discharge pipe extension 7 collects foreign particles on the taper wall 13 due to the swirling and descending flow, and collects near the lower end of the taper wall 13. The collected foreign particles are guided further radially outward and downward through the guide passage portion 16. In addition, although the guide channel | path part 16 was provided as an inclined groove | channel, it is not restricted to this, For example, you may provide as a through-passage.

  Below the cylindrical portion 2e, an inverted conical portion 2f, a conical portion 2g, and an inverted conical portion 2f are provided. The lower end of the inverted conical portion 2f on the lower side (that is, the cyclonic processing vessel 2 (fluid vortex portion) At the bottom part 2b), a discharge port 4 is provided for discharging the foreign particles j.

  The fluid eddy current portion 2b, which is constituted by the cylindrical portion 2e, the inverted conical portion 2f, the conical portion 2g, and the inverted conical portion 2f, is configured to be detachably inserted into the cylindrical outer cylinder 5. . The cylindrical outer cylinder 5 is fixed to the main body portion 2a by a bolt 10 inserted through a flange portion 5a formed near the upper end portion thereof. A coil spring 311 is provided in the bottom of the cylindrical outer cylinder 5 to push the fluid vortex 2b upward. Thus, by fixing the cylindrical outer cylinder 5 to the main body portion 2a with the bolt 10, the fluid vortex portion 2b is pressed upward and assembled, so that the assembling property and the maintenance property are excellent. In particular, when the foreign particle j includes abrasive grains, it can be easily replaced with a member having wear resistance so that aggressive wear or the like hardly occurs. The cylindrical outer cylinder 5 is made of, for example, foreign particles j including foreign particles in the fluid to be treated in the outer circumferential direction on the outer peripheral surface 2i of the side wall 2j in the vicinity of the lower end of the cylindrical discharge pipe extension 7). When a magnet that attracts toward the surface is provided, it may be made of a non-magnetic material such as stainless steel or synthetic resin. However, even when such a magnet is provided, there is no influence on the action of the magnetic force. For example, a steel pipe may be used. Moreover, although the main-body part 2a and the fluid eddy current part 2b are comprised by the different body, they may be integrated. O-rings 8 are provided between the cylindrical outer cylinder 5 and the cyclonic processing container 2, between the side wall parts 2j, and between the lowermost side wall part 2j and the cylindrical outer cylinder 5, and Leakage is surely prevented. In the above example, the fluid vortex portion 2b is divided into four side wall portions 2j. However, the present invention is not limited to this, and may be integrated or divided into two. Further, the conical portion 2g and the inverted conical portion 2f may be provided in only one stage.

  In addition, the foreign particles j having a relatively large specific gravity, which flows into the cyclone processing container 2 and then moves to the outer peripheral side quickly by centrifugal force, are separated from the cyclone processing container 2 at the lower part of the swivel cylindrical part 2c. A bypass channel 20 is provided for bypassing the portion 11 and being guided below the cyclone separation portion 11.

  The inflow port 20a of the bypass channel 20 is opened to the upper surface 9a of the protruding wall 9, and the outflow port 20b is opened to the lower end surface 11a of the cyclone separator 11, and the inflow port 20a and the outflow port 20b are connected linearly. The bypass channel 20 is provided so as to penetrate downward through the wall of the swiveling cylindrical portion 2d of the cyclone separating portion 11 as described above. In addition, although the bypass flow path 20 is linearly extended downward, it is good also as a flow path inclined in the circumferential direction according to the direction of the swirl flow.

  As shown in FIG. 5, two bypass flow paths 20 are provided at intervals of 180 °, and the guide passage portion 16 is provided at two positions that are offset from these bypass flow paths 20 by 90 ° in the circumferential direction. .

  The partition wall 9b, the upper surface 9a of the protruding wall 9 and the inverted conical portion 2c2 of the upper part 2c of the swivel cylinder form a donut-shaped channel that communicates with the inlet 20a of the bypass channel 20. As a result, the foreign particles j having a relatively large specific gravity flowing into the cyclone processing container 2 from the inlet 3 and moving to the outer peripheral side by centrifugal force are reliably transferred from the inlet 20a to the lower end surface of the cyclone separator 11. The separation unit 11 is bypassed and guided. Further, the first inclined groove 21 that gradually becomes deeper toward the inlet 20a is provided in the circumferential direction, and the swirling fluid j to be processed easily enters the inlet 20a. The inclination angle of the first inclined groove 21 is about 4 to 8 °, and the length of the first inclined groove 21 is preferably about 2 to 5 times the opening width of the first inclined groove 21. On the other hand, the remaining fluid to be treated is further swirled and lowered from the inner peripheral side of the partition wall 9b downward.

  As shown in FIGS. 2 and 3, a lower separation wall 12 is provided at a position below the fluid discharge port 7h. The lower separation wall 12 includes a cylindrical wall 12a and a bottom wall 12b disposed below the fluid discharge port 7h and inside the lower portion of the cylindrical portion 2e. About four discharge holes 12c are provided radially at the lower end of the cylindrical wall 12a. Since the foreign particle j that has entered the inside of the lower separation wall 12 is also swirled by centrifugal force, it is discharged from the discharge hole 12c to the outside of the lower separation wall 12 using swirl flow. The discharge hole 12c may also be provided in the bottom wall 12b. The lower separation wall 12 is provided with a support portion 12d provided downward in the center of the bottom wall 12b. The support portion 12d is passed through a through hole 12h provided in the center portion of the support plate 12e supported between the lower end surface of the cylindrical portion 2e and the step portion formed at the upper end portion of the inverted conical portion 2f. Thus, a nut 12f is screwed into a screw portion provided on the outer periphery of the support portion 12d, and the lower separation wall 12 itself is fixed. As shown in FIG. 8, the support plate 12e is provided with four notches 12g, and the foreign particles j collected on the outer periphery of the cylindrical portion 2e are resistant to falling toward the inverted conical portion 2f. Is to reduce as much as possible.

  2 and 8, the lower separation wall 12 is fixed so that the support portion 12d is sandwiched between the cylindrical portion 2e and the inverted conical portion 2f as described above. Not limited to this, it may be fixed to the cylindrical portion 2e. Further, the shapes and positions of the cylindrical wall 12a and the bottom wall 12b are not particularly limited, and the separation efficiency of the foreign particles j is increased according to the shapes and positions of the cylindrical discharge pipe extension portion 7 and the cyclone separation portion 11. What is necessary is just to determine suitably. In addition, the provision of the cylindrical wall 12a is not limited to the provision of the bottom wall 12b, and the effect of preventing foreign particles j from flowing from the lower end of the cyclone separation unit 11 to the inner peripheral side can be obtained to some extent.

  On the upper surface of the main body 2a, a floating material having a relatively low specific gravity such as oil (for example, foreign particles having a low specific gravity, oil components, floating carbon, floating dust, etc., hereinafter referred to as a floating material) is collected. A floating object discharge port 25 is provided. In addition, you may provide in a side surface so that it may penetrate and open from a tangential direction.

  Further, the cyclone separation / removal device 1 does not necessarily include the floating material discharge port 25, and may be mainly used for removal of foreign particles j by centrifugation.

  A flow rate adjusting valve 31 for adjusting the flow rate and / or pressure of the treated fluid after purification is provided downstream of the cylindrical discharge pipe 6 from which the treated fluid after purification is discharged. On the other hand, a flow rate adjusting valve 32 for adjusting the flow rate and / or pressure of the fluid to be processed discharged together with the foreign particle j is provided downstream of the outlet 4 for the foreign particle j after being centrifuged.

-Operation of foreign particle separation apparatus 1-
The operation of separating and collecting foreign particles j in the foreign particle separation apparatus 1 configured as described above will be described.

First, the fluid to be processed including the foreign particles j is introduced into the cyclone processing container 2 from the introduction port 3 (see FIGS. 2 to 4) at high speed. The introduced fluid to be treated is swirled along the swirling cylindrical portion 2c on the inner peripheral surface 2h of the cyclonic processing vessel 2 to generate a swirling flow. Here, the levitated matter having a small specific gravity contained in the fluid to be treated is levitated and concentrated on the upper part in the cyclone type processing container 2 by the buoyancy that causes the levitated substance to levitate. The floated and aggregated float is a process in which the fluid to be treated swirls around the cylindrical discharge pipe 6, and the upward flow is promoted by the conical shape of the inverted conical portion 2 c 1. Will be levitated and concentrated at the top of And it is discharged | emitted out of the cyclone type processing container 2 from the floating material discharge port 25. FIG. On the other hand, the remaining fluid that has not flowed into the floating material discharge port 25 (that is, the fluid to be treated from which the floating material having a small specific gravity has been removed) descends while turning, and centrifugal force acts, and in addition, a cylindrical shape Due to the action of the bulging portion 7a formed at the threaded portion between the discharge pipe 6 and the cylindrical discharge pipe extension portion 7, a force directed toward the outer periphery acts. In particular, the swirl flow is promoted by the first spiral groove 71 formed in the bulging portion 7a. Thereby, the foreign particles j having a relatively large specific gravity move intensively in the outer peripheral direction and flow into the bypass channel 20 from the inflow port 20a. Thereby, for example, about 50% of the foreign particles j are removed.

  The remaining fluid to be processed swirls and flows downward from the inner peripheral side of the partition wall 9b, and the swirl speed is increased by the second spiral groove 72 formed on the outer periphery of the cylindrical discharge pipe extension 7. The Therefore, relatively small foreign particles j that have not been brought into the bypass channel 20 from the inflow port 20a move outward in the radial direction due to a stronger centrifugal force, and descend. When the fluid is further lowered while swirling, the swirling radius of the fluid to be treated is reduced by the protruding wall 9 and the constricted portion 7b of the cylindrical discharge pipe extension portion 7, and a stronger centrifugal force acts on the foreign particle j. When the fluid to be treated descends below the protruding wall 9, the foreign particles j having a relatively high specific gravity in the fluid to be treated are separated toward the tapered wall 13 of the swiveling cylindrical portion 2d due to the centrifugal force. The relatively clean fluid that has moved and has very few foreign particles j gathers near the outer periphery of the cylindrical discharge pipe extension 7. The foreign particles j gathering on the tapered wall 13 are unlikely to move to the inner peripheral side again, and therefore gradually gathered to the outer peripheral side as the fluid to be processed descends and flows while swirling, and into the clean fluid to be processed on the inner peripheral side. The possibility of contamination by foreign particles is reduced. The foreign particle j descends along the tapered wall 13 and gathers and turns between the lower end portion of the tapered wall 13 and the inward wall 14. And it flows into the guide passage part 16 from the inlet 16a while being guided to the second inclined groove 22, and moves downward from the cyclone separator 11 from the outlet 16b. Since the relatively clean fluid to be processed that moves downward from the tapered wall 13 further descends while swirling, the foreign particles j are further separated and moved outward as the swirling descends. The moved foreign particle j is lowered while moving further outward along the conical portion 15, so that the fluid to be treated that descends along the outer periphery of the tubular discharge pipe extension 7 becomes even cleaner. Here, the reason why it is expressed as a relatively clean fluid in which the foreign particle j is extremely small is that, for example, the foreign particle of 1 μm to 5 μm is guided to the cylindrical discharge pipe extension 7 together with the clean fluid because it is light. This is because there is a possibility that foreign particles are slightly included. The relatively clean fluid descends along the inclined reduced portion 7f formed at the lower end of the cylindrical discharge pipe extension 7, and changes direction in the opposite direction at the lower end of the cylindrical discharge pipe extension 7. It is guided to the fluid discharge port 7h through the guide inclined portion 7g. The fluid is discharged from the fluid discharge port 7h through the cylindrical discharge pipe extension 7 and the cylindrical discharge pipe 6 to the super clean tank 104. Since the fluid to be treated is swirling and descending in the flow changing the direction, the foreign particles of 1 μm to 5 μm having a specific gravity relative to the clean liquid tend to move to the lower position side. It accumulates in the lower separation wall 12.

  In addition, by providing such a lower separation wall 12, the foreign particle j and the bypass flow path 20 that have moved to the lower end portion 11 a of the cyclone separation section 11 through the guide passage section 16 due to the centrifugal force of the swirling flow. The cylindrical wall 12a and the bottom wall 12b prevent foreign particles j and the like that have passed through and moved to the lower end 11a of the cyclone separator 11 from entering the inner peripheral side of the cyclone separator 11 at the lower end of the cyclone separator 11. Therefore, it is possible to more reliably prevent the foreign particles j from being mixed into the clean fluid to be discharged and discharged from the fluid discharge port 7h. Further, it is possible to prevent the foreign particle j moving toward the conical portion 15 from moving toward the inner peripheral side of the cylindrical wall 12a (in the direction of the fluid discharge port 7h of the cylindrical discharge pipe extension 7).

  The foreign particles j separated and aggregated from the outer periphery of the lower end of the cylindrical part 2e to the upper end of the inverted conical part 2f eventually become a nodule and fall along the inclined surface of the inverted conical part 2f by its own weight. The foreign particles j discharged from the discharge port 4 through the cylindrical portion 2 and the inverted conical portion 2f are recovered in a recovery container (not shown).

  As described above, the foreign particles j having a relatively large specific gravity contained in the fluid to be processed flowing into the cyclonic processing container 2 are first separated by the bypass flow path 20 and separated by the cyclone separation route through the cyclone separation unit 11. Guided to the lower end surface 11 a of the part 11. Therefore, since the separation in the cyclone separation part 11 can be set so as to separate the foreign particles j having a relatively low specific gravity, for example, the inside and outside of the swivel tubular part 2d and the tubular discharge pipe extension part 7 on the downstream side thereof. The diameter and the lead angle of the second second spiral groove 72 can be set so as to be suitable for removing magnetic particles having a small specific gravity, and as a whole, the removal efficiency with respect to the fluid to be treated in which magnetic particles j having various specific gravity are mixed. Can be greatly increased.

<< Embodiment 2 of the Invention >>
Another example of the foreign particle separator 1 will be described with reference to FIGS. The foreign particle separation apparatus 1 of the second embodiment is mainly different from the foreign particle separation apparatus 1 of the first embodiment in the structure of the cyclone separation unit 11. In the second embodiment, description of the same parts as those in the first embodiment is omitted, and only different parts are described, and the description is simplified.

  In the second embodiment, the inner peripheral surface of the partition wall 9b of the protruding wall 9 is narrowed in a smooth shape, and the inner wall provided on the upper end portion of the swiveling cylindrical portion 2d of the cyclone separating portion 11 on the extended line. It is connected to the peripheral surface 2d1. The length of the inner peripheral surface 2d1 is slight, and the inner peripheral surface 2d2 has a small inner diameter immediately. A conical portion 15 is provided at the lower end of the inner peripheral surface 2d2. The inner peripheral surface 2d2 is provided over a length of about 2/3 of the total length. Guide passage portions 56 are provided at two locations on the inner peripheral surface 2d2 at intervals of 180 ° with an inclination angle of about 7 to 10 ° toward the outside in the radial direction. The inlet 56a of the guide passage 56 is wide open from the step between the inner peripheral surface 2d1 and the inner peripheral surface 2d2 to the length of the inner peripheral surface 2d2, and the outlet 56b of the guide passage 56 is formed in the cyclone separating portion 11. The foreign particle j that has moved into the guide passage 56 by centrifugal force is promptly guided to the lower end 11a of the cyclone separator 11.

  The cross-sectional shapes of the first spiral groove 71 and the second spiral groove 72 are not limited to the wedge shape, and may be formed in a square shape or an arc shape.

  In addition, in the said embodiment, although the guide channel parts 16 and 56 were provided as a groove | channel, you may form as a channel | path of not only a groove | channel but a through-hole.

  Two guide passage portions and two bypass flow passages are provided. However, the number of the guide passage portions and the bypass flow passages is not limited to this number, and may be appropriately selected depending on the type or flow rate of the fluid to be treated. Conversely, it may be less.

  The first embodiment and the second embodiment may be combined.

DESCRIPTION OF SYMBOLS 1 Foreign material particle separation apparatus 2 Cyclone-type processing container 2a Main-body part 2b Fluid swirl part 2c Swirling cylindrical part 2c1 Reverse cone-shaped part 2c2 Conical part 2d Swirling cylindrical part 2e Cylindrical part 2f Reverse cone-shaped part 2g Conical part 2h Inner peripheral surface 2i Outer peripheral surface 2j Side wall 3 Inlet 4 Discharge 5 Cylindrical outer cylinder 5a Flange 6 Cylindrical discharge pipe 7 Cylindrical discharge pipe extension 7a Swelling part 7b Constriction part 7c Constriction part 7d Constriction part 7e Expansion Diameter portion 7f Inclination reduction portion 7g Guide inclination portion 7h Fluid discharge port 8 O-ring 9 Projection wall 9a Upper surface 9b Partition wall 10 Bolt 11 Cyclone separation portion 11a Lower end surface 12 Lower separation wall 12a Cylindrical wall 12b Bottom wall 12c Discharge hole 12d Support portion 12e Support plate 12f Nut 12g Notch 12h Through hole 13 Taper wall 14 Inward wall 15 Conical part 16 Guide passage part 16a Inlet 16b Outlet 20 Ipass channel 20a Inlet 20b Outlet 21 First inclined groove 22 Second inclined groove 71 First spiral groove 72 Second spiral groove 25 Floating object discharge port 31 Flow rate adjusting valve 32 Flow rate adjusting valve 100 Fluid purification system 101 Workpiece Machine 102 Dirty tank 103 Dust separation tank 104 Super clean tank 105 Pump 107 Dust box 108 Dust separation device j Foreign particles

Claims (13)

A cyclone in which the fluid to be treated containing foreign particles is swirled and lowered along the inner peripheral surface, and the foreign particles in the fluid to be treated are separated by a centrifugal force generated by the swirling and descending flow and discharged from the lower foreign particle discharge port. A processing container;
The cyclone type processing container has an opening that extends in the vertical direction at the center of the cyclone type processing container and that opens at the lower end inside the cyclone type processing container. A discharge pipe leading out of the processing container,
A foreign matter particle separation device comprising:
An inlet that is opened in the inner peripheral wall on the upper side of the cyclonic processing container and into which the fluid to be treated is swirled and introduced into the cyclonic processing container;
A projecting wall that projects from the inner peripheral wall toward the inner peripheral direction at a position below the inlet, and narrows the flow path of the fluid to be processed in the downward direction;
A cyclone separation part comprising a swirling cylindrical part provided extending from the protruding wall to the lower inner peripheral wall to a position below the opening of the discharge pipe;
A bypass flow path provided so as to bypass the swivel cylindrical portion of the cyclone separating portion and communicate the upper surface of the projecting wall and the lower end portion of the cyclone separating portion;
It has an inlet on the swiveling surface of the swivel cylindrical part, has an outlet on the lower end part of the cyclone separation part, and is provided radially outward and downward, and on the swivel surface side of the swirl cylindrical part A plurality of guide passage portions for guiding the foreign particles gathered in the downward direction;
A foreign particle separation apparatus comprising: The foreign particle separation apparatus according to claim 1,
The foreign substance particle separation device, wherein the guide passage part is composed of a groove part. The foreign particle separation apparatus according to claim 1,
The foreign matter particle separation device, wherein the guide passage portion is formed of a through passage. The foreign particle separation apparatus according to any one of claims 1 to 3,
An inward wall extending from the lower end portion of the tapered wall toward the inner circumferential direction is provided with a tapered wall that gradually increases in diameter downward on the turning surface of the turning cylindrical portion of the cyclone separating portion. A foreign particle separation apparatus comprising: In the foreign particle separation apparatus according to claim 4,
The foreign substance particle separation device, wherein the inlet of the guide passage portion includes the lower end portion of the tapered wall and includes a part of the tapered wall and a part of the inward wall. The foreign particle separation apparatus according to any one of claims 1 to 5,
The upper surface of the bypass flow path is provided with a first inclined groove that gradually becomes deeper toward the inflow port provided on the upper surface, and is provided in a circumferential direction. Separation device. The foreign particle separation apparatus according to any one of claims 1 to 6,
A second inclined groove that gradually becomes deeper toward the inlet of the guide passage portion is provided in the circumferential direction on the turning surface of the turning cylindrical portion of the cyclone separating portion. A foreign particle separation device characterized. The foreign particle separation apparatus according to any one of claims 1 to 7,
A foreign particle separation apparatus characterized in that a conical portion having a diameter increasing toward the lower side is formed at a lower end portion of the cyclone separation portion and facing the opening of the discharge pipe. The foreign particle separation apparatus according to any one of claims 1 to 8,
A foreign particle separating apparatus, wherein a first spiral groove is formed on an outer peripheral surface of the discharge pipe facing the swirling surface of the swirling cylindrical portion. The foreign particle separation apparatus according to any one of claims 1 to 9,
A foreign matter having a position corresponding to between the introduction port and the protruding wall, wherein a protrusion is provided on the outer peripheral surface of the discharge pipe, and a second spiral groove is formed in the protrusion. Particle separator. The foreign particle separation apparatus according to any one of claims 1 to 10,
A lower separation wall comprising a bottom surface, an enclosure wall rising from the bottom surface, and an exhaust hole opened at the lower end of the enclosure wall is installed at a position below the discharge pipe and facing the opening. A foreign particle separation apparatus characterized by the above. The foreign particle separation apparatus according to any one of claims 1 to 11,
A foreign particle separation apparatus, wherein a valve for adjusting at least one of a flow rate and a pressure is provided on at least one of the downstream side of the discharge pipe and the downstream side of the discharge port. The foreign particle separation apparatus according to any one of claims 1 to 12,
In the cyclone processing vessel, a floating material discharge port is provided at a position above the position where the inlet for the fluid to be processed is provided to collect and discharge the floating material that has floated above the cyclone processing vessel. A foreign particle separation apparatus characterized by the above.

Images