JP2019113103A - Flow passage changeover mechanism and mist generation device - Google Patents

Abstract

To provide a flow passage changeover mechanism which can suitably supply mist, and a mist generation device having the flow passage changeover mechanism.SOLUTION: A flow passage changeover device 11 comprises a first member 13 which a first flow passage 65 having a bent part 64 penetrates, a second member 12 having a reception part 16 for receiving the first member 13 in a movable state, and a plurality of second flow passages 17 which penetrate the second member 12, and whose one-side end parts are opened at an inner face of the reception part 16. Then, the flow passage changeover device 11 selectively connects the first flow passage 65 to the arbitrary second flow passage 17 by a change of a relative position of the first member 13 with respect to the second member 12, and can supply fluid including mist to the second flow passage 17 from the first flow passage 65, or to the first flow passage 65 from the second flow passage 17. A curvature radius of a flow passage center J4 of the bent part 64 is a half of a flow passage diameter D or larger.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flow path switching mechanism for switching a flow path for supplying a fluid, and a mist generating device capable of generating mist with an oil film and selectively supplying the mist to a plurality of places.

  Conventionally, so-called three-way valves, air operated valves, and the like are known as those provided with a flow path switching mechanism of this type (see, for example, Non-Patent Document 1).

[Online], SMC Corporation WEB catalog, [September 19, 2017 search], Internet <URL: http://www.smcworld.com/products/ja/directional/s.do?ca_id=114>

  However, when the fluid channel switching mechanism is used in a fluid containing mist, problems such as a change in particle diameter of the mist or dropletization have occurred.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a flow path switching mechanism capable of suitably feeding mist and a mist generation device having the flow path switching mechanism.

  The invention according to claim 1 made to achieve the above object comprises a first member through which one first flow passage having a bending portion penetrates, and a second receiving member for movably receiving the first member. A second member, and a plurality of second flow paths having one end opened in the inner surface of the receiving portion, the second member being penetrated, and the change of the relative position of the first member with respect to the second member One flow path is alternatively connected to any second flow path, and a fluid containing mist from the first flow path to the second flow path or the second flow path to the first flow path It is a flow path switching mechanism that enables feeding, and is a flow path switching mechanism in which the curvature radius of the flow path center of the bent portion is 1/2 or more of the flow path diameter.

  According to the second aspect of the present invention, at least a portion including the bent portion of the first member is divided into a plurality of divided bodies in a plane including the flow channel center of the bent portion, and the divided bodies are combined It is a flow-path switching mechanism of Claim 1 provided with the combined holding means to hold | maintain.

  In the invention of claim 3, the receiving portion is a round hole, the openings of the plurality of second flow paths are disposed on the inner circumferential surface thereof, and the first member is rotatably received in the receiving portion. A cylindrical portion is provided, and one opening of the first flow passage is disposed at the center of one end face of the cylindrical portion, and the other opening of the first flow passage is disposed on the outer peripheral surface of the cylindrical portion It is a flow-path switching mechanism of Claim 1 or 2.

  In the invention of claim 4, the receiving portion is a round hole closed at least at one end by a closing member, and the second flow path is disposed at a position away from the center of the round hole in the closing member. An opening is disposed, the first member has a cylindrical portion rotatably received in the receiving portion, and one opening of the first flow passage is disposed at the center of one end face of the cylindrical portion And the other opening of the first flow passage is disposed at a position away from the center of the other end face, and the first flow passage has an S shape having the two bent portions. Or it is a flow-path switching mechanism as described in 2.

  The invention according to claim 5 is provided with a nozzle having the flow path switching mechanism according to any one of claims 1 to 4 at the tip end portion, generating mist with an oil film to produce the first flow path. It is a mist generating device to discharge.

  According to the flow channel switching mechanism of the present invention, the mist generation device is connected to the first flow channel side among the first flow channel and the second flow channel, and the plurality of second flow channels are selected at a plurality of locations. Can supply mist. Further, different mist generation devices can be connected to the plurality of second flow paths to selectively supply different mists to predetermined locations. At that time, the fluid containing the mist can change the flow direction at the bending portion of the first flow passage. However, in the flow channel switching mechanism of the present invention, since the curvature radius of the flow channel center of the bent portion is 1/2 or more of the flow channel diameter, the fluid containing the mist flows smoothly. As a result, bonding of the particles of the mist and collision of the particles to the inner surface of the flow path can be suppressed, and changes in the particle diameter of the mist and dropletization of the mist can be suppressed. That is, according to the present invention, the mist can be suitably fed.

  Further, according to the mist generating apparatus of the present invention, the mist having the oil film is generated, and the mist is selectively shared at a plurality of places in a state in which the change of the particle diameter of the mist and the droplet formation of the mist are suppressed. it can.

  As a specific configuration of the flow path switching mechanism based on claim 1 or 2, the following configuration examples 1 and 2 can be mentioned in addition to claim 3 or 4.

[Configuration Example 1]
In the flow path switching mechanism according to claim 1 or 2,
The receiving portion is a round hole, and openings of two second flow paths are circumferentially arranged on the inner peripheral surface of the receiving portion, and a central position between the openings of the two second flow paths An opening of a third flow passage passing through the second member;
The first member has a cylindrical portion rotatably received in the receiving portion, and openings at both ends of the first flow path are disposed on the outer peripheral surface of the first member, and the first member may be arranged according to the rotational position of the cylindrical portion. A flow path switching mechanism in which a first flow path selectively connects the two second flow paths to the third flow path.

[Configuration Example 2]
In the flow path switching mechanism according to claim 1 or 2,
The first member is linearly received in the receptacle;
The opening at one end of the first flow passage is disposed on one end side in the linear movement direction of the first member, and the opening at the other end of the first flow passage is in the linear movement direction of the first member Placed in parallel planes,
A flow path switching mechanism in which the openings of the plurality of second flow paths are arranged in the linear movement direction on the inner surface of the receiving portion.

Side cross-sectional view of a mist generating apparatus according to an embodiment of the present invention Side cross-sectional view of the flow path switching device Front sectional view of the flow path switching device Side cross-sectional view of the mist generating apparatus according to the second embodiment Front view of the mist generating apparatus according to the second embodiment Side cross-sectional view of the mist generating apparatus according to the third embodiment Side sectional view of mist generating device according to the fourth embodiment

First Embodiment
Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 3. As shown in FIG. 1, the mist generation apparatus 10 of this invention connects the mist generation apparatus main body 30 and the flow-path switching apparatus 11 (equivalent to the "flow-path switching mechanism" of this invention). The nozzle 30N of the mist generation device main body 30 includes a cylindrical base 39 and a tip end configuration part 38. The cylindrical base 39 has a cylindrical shape, and a female screw 39N is formed inside the tip of the cylindrical base 39. On the other hand, the tip end configuration portion 38 has a structure in which the flange portion 38F protrudes from an intermediate portion in the axial direction of the cylindrical portion 38K having a diameter smaller than that of the cylindrical base 39. A male screw 38N is formed on the outer surface at one end side of the flange 38F in the tip end component 38. Then, the male screw portion 38N of the distal end forming portion 38 is screwed into the female screw portion 39N of the cylindrical base 39, and the flange portion 38F is overlapped with the distal end surface of the cylindrical base 39. An O-ring 37A is sandwiched between the flange portion 38F and the tip end surface of the cylindrical base 39.

  Hereinafter, in the respective components of the mist generating apparatus main body 30 and the flow path switching apparatus 11, the left side in FIGS. 1 and 2 is referred to as “front side”, and the right side in FIGS. 1 and 2 is referred to as “rear side”. .

  A ring groove 39A is formed at a position near the rear end of the cylindrical base 39, and an E ring 39E is engaged therewith. The first orifice 33, the collar 34 and the second orifice 35 are fitted in order from the rear side between the E-ring 39E and the tip end component 38 in the cylindrical base 39.

  A central hole 33D penetrates the central portion of the first orifice 33. The central hole 33D has a diameter reducing portion 33A whose diameter decreases from the rear end toward the rear end, an enlarged diameter portion 33C whose diameter increases from the front end toward the front end, and the front end of the diameter reducing portion 33A. A communication portion 33B communicates with the rear end of the diameter portion 33C, and includes a communication portion 33B extending in a uniform diameter. Further, around the connecting portion 33B, a plurality of bypass holes 33E having a smaller diameter than that are formed. The bypass holes 33E communicate between the outer edge of the reduced diameter portion 33A and the position closer to the center of the enlarged diameter portion 33C, and are inclined so as to approach the central portion of the first orifice 33 toward the enlarged diameter portion 33C. ing. Further, the first side flow passage 31 extending from the inner peripheral surface of the connecting portion 33B to the outer peripheral surface of the first orifice 33 is formed at one circumferential direction of the first orifice 33, and the first side flow passage The reference numeral 31 is formed to extend to the outer peripheral surface of the cylindrical base 39.

  The collar 34 has a cylindrical shape, and the first expanded chamber 30V is composed of the inner portion of the collar 34 and the enlarged diameter portion 33C of the first orifice 33.

  The second orifice 35 is longer in axial length than the first orifice 33. Then, similarly to the first orifice 33, it has a central hole 35D including a diameter reducing portion 35A, a connecting portion 35B, and a diameter increasing portion 35C, and a plurality of bypass holes 35E. Further, a second side flow passage 32 similar to the first side flow passage 31 extends from the inner peripheral surface of the connecting portion 35 B of the second orifice 35 to the outer peripheral surface of the cylindrical base 39.

  Further, a central hole 38D penetrating to the central portion of the distal end forming portion 38 has a diameter reducing portion 38A whose diameter decreases from the rear end toward the central portion in the axial direction, and the front end forming portion 38 from the front end of the reduced diameter portion 38A. It consists of the mist output part 38B which extends in a uniform diameter to the front end. A second expanded chamber 30W is formed of the diameter-reduced portion 38A of the tip end portion 38 and the diameter-increased portion 35C of the second orifice 35.

  A female screw portion (not shown) is formed inside the rear end portion of the cylindrical base 39, and a compressed air pipe is connected to a pipe joint (not shown) screwed thereto. Similarly, an oil supply pipe (not shown) is connected to the first side flow passage 31 and a water supply pipe (not shown) is connected to the second side flow passage 32. Then, compressed air (corresponding to the “fluid” of the present invention) is fed through the compressed air pipe, and the oil (for example, lubricating oil for cutting) supplied to the first side flow passage 31 is pumped. And the water supplied to the second side flow passage 32 is similarly pumped, misted in the second expanded chamber 30W, and combined with the oil mist to form a mist with an oil film. Is generated. And the air containing the mist with oil film is discharged from mist output part 38B ahead.

  As shown in FIG. 2, the flow path switching device 11 is connected to the tip of the nozzle 30N of the mist generating apparatus main body 30 (specifically, a portion on the front side of the flange portion 38F in the tip configuration portion 38). The flow path switching device 11 has the first member 13 rotatably assembled to the second member 12, and the first member 13 (corresponding to the “cylindrical portion” of the present invention) includes the core member 40 and the base member And 50.

  The base member 50 has a cylindrical shape as a whole, and a flange portion 50F protrudes laterally from its rear end. Further, at a position near the rear end of the base member 50, there is provided a dividing wall 52 which divides the inside of the base member 50 into the core accommodation room 51 on the front side and the connection room 53 on the rear side. Furthermore, a flow passage 61 having substantially the same diameter as the mist output portion 38B of the mist generation device main body 30 penetrates through the central portion of the partition wall 52. The distal end of the distal end forming portion 38 is received in the connecting chamber 53. Further, the mist generating apparatus main body 30 is pushed toward the base member 50 by urging means (not shown), and the tip end face of the tip end forming portion 38 abuts against the rear face of the dividing wall 52, and the center hole 38D of the tip end forming portion 38 The channel 61 is in communication. An O-ring 37B is interposed between the inner peripheral surface of the connection chamber 53 and the outer peripheral surface of the distal end forming portion 38.

  A flow passage 62 is formed in the base portion 50. The flow passage 62 has, for example, an inner diameter substantially the same as the flow passage 61 and penetrates the base portion 50 in the radial direction. The distance between the flow path center J1 of the flow path 62 and the front surface of the partition wall 52 is, for example, 1.5 times the diameter of the flow path 61 (hereinafter simply referred to as “flow path diameter D”). In addition, an O-ring groove 18 is formed on the outer peripheral surface of the base portion 50 so as to surround the opening of the flow passage 62.

  The core member 40 has a cylindrical shape as a whole, and is fitted in the core accommodation room 51, and the rear end surface of the core member 40 is in surface contact with the front surface of the partition wall 52. For example, the core storage room 51 is fixed in the core storage room 51 with an adhesive that doubles as a seal that closes a gap between the core storage room 51 and the core member 40.

  The core member 40 is formed with a flow passage 63 communicating between the flow passage 61 of the base member 50 and the flow passage 62. The flow channel 63 has an inner diameter substantially equal to that of the flow channels 61 and 62 (that is, the same flow channel diameter D). Further, the flow path 63 has a bent portion 64, and both ends thereof face in directions different by, for example, 90 degrees and are in communication with the flow paths 61 and 62. The flow paths 61, 62, 63 constitute a first flow path 65 according to the present invention.

  Specifically, the channel center J3 at one end of the channel 63 overlaps the central axis CL of the core member 40, and the channel center J2 at the other end of the channel 63 is the central axis CL with the core member 40. It is directed in the orthogonal radial direction. Further, the distance between the flow path center J2 at the other end of the flow path 63 and the front surface of the dividing wall 52 is the same as the distance between the flow path center J1 of the flow channel 62 and the front surface of the dividing wall 52 For example, it is 1.5 times D. The flow channel center J4 of the bending portion 64 is an arc continuous with the flow channel center J3 at one end of the bending portion 64 and the flow channel center J2 at the other end. The radius of curvature R1 is 1.5 times the channel diameter D.

  As shown in FIG. 3, the core member 40 is vertically divided into a pair of divided bodies 41, 41 at a dividing surface 45 including the flow channel center of the flow channel 63. Further, the split bodies 41 are not fixed to each other, and the split bodies 41 are held together in a united state by being fitted into the core accommodation room 51 by press fitting. Thus, since the core member 40 is divided | segmented into the division bodies 41 and 41, the flow path 63 which has the bending part 64 can be formed in the core member 40 by machining.

  In addition, if the core member 40 is manufactured by casting including die casting, and in this case, using a bent core for the flow path 63, the flow path 63 can be formed without dividing the core member 40. Further, the pair of divided bodies 41, 41 can also be formed of a resin such as polytetrafluoroethylene. In the present embodiment, the base member 50 having the core accommodation room 51 corresponds to the "coalescent holding means" according to the present invention, but the adhesive for fixing the divided bodies 41, 41 together is the "coalescent holding means according to the present invention You may use it as "."

  The second member 12 has a receiving portion 16 in which the tip end portion of the first member 13 is fitted with the flange portion 50F. Further, an O-ring 19 mounted in the O-ring groove 18 is sandwiched between the inner peripheral surface of the receiving portion 16 and the outer peripheral surface of the first member 13. Then, the second member 12 and the mist generation device main body 30 are fixed so as not to move relative to each other, and the first member 13 rotates with respect to the second member 12 and the mist generation device main body 30. In order to perform the rotation operation of the first member 13, for example, a pair of pins (not shown) project from the front surface of the first member 13, and a handle (not shown) can be connected to the pair of pins. Further, on the front surface of the first member 13 and the second member 12, a mark for visually recognizing the rotational position of the first member 13 is provided.

  In the second member 12, for example, a plurality of second flow paths 17 are radially formed around the receiving portion 16. The openings at one end of the second flow path 17 are arranged side by side on the movement path of the opening of the first flow path 65 in the outer peripheral surface of the first member 13 in the inner peripheral surface of the receiving portion 16. By rotating the first member 13 with respect to the member 12, the first flow path 65 is alternatively connected to the plurality of second flow paths 17. Further, an opening at the other end (not shown) of the plurality of second flow paths 17 is disposed on the outer surface of the second member 12 and faces a predetermined plurality of places or is connected to the flow path component.

  The description regarding the structure of the mist generation apparatus 10 of this embodiment is above. According to the mist generating apparatus 10 of the present embodiment, the mist generating apparatus main body 30 generates mist with an oil film and feeds it to the first flow path 65 of the flow path switching device 11, and from the first flow path 65 The mist can be alternatively supplied to a plurality of locations ahead of the plurality of second flow paths 17. At that time, the fluid containing the mist can change the flow direction at the bending portion 64 of the first flow passage 65. However, in the flow path switching device 11 of the present embodiment, the curvature radius R1 of the flow path center J4 of the bent portion 64 is 1/2 or more of the flow path diameter D (specifically, 1.5 times the flow path diameter D) Because it has become, air containing mist flows smoothly. As a result, bonding of the particles of the mist and collision of the particles to the inner surface of the flow path can be suppressed, and changes in the particle diameter of the mist and dropletization of the mist can be suppressed. That is, according to the mist generating apparatus 10 of the present embodiment, the mist can be suitably fed.

  In addition, the flow path switching device 11 of the present embodiment removes the mist generation device main body 30 from the connection chamber 53, makes the opening of the connection chamber 53 face a predetermined location, and a plurality of different second flow passages 17 are different. A mist generation device can also be connected and used. As a result, different mists can be alternatively supplied to predetermined positions in front of the connection chamber 53.

  Further, as a modification of the flow path switching device 11 of the present embodiment, for example, in the base member 50 described above, a plurality of flow paths 62 are formed coaxially with the plurality of second flow paths 17. The structure which rotates the core member 40 is also considered. In this case, the core member 40 corresponds to the "first member" according to the present invention, and the second member 12 and the base member 50 correspond to the "second member" according to the present invention. In addition, the flow path 62 forms a part of the “second flow path” according to the present invention together with the second flow path 17, and the “first flow path” according to the present invention is constituted only by the flow path 63. Become.

Second Embodiment
The mist generating device 10V of this embodiment is shown in FIG. The mist generating apparatus main body 30 in the present embodiment differs from the first embodiment only in that it has a bracket 30B that protrudes laterally from the front end. The bracket 30B has a square shape substantially identical to the second member 12V described next when viewed from the front, and has female screw holes (not shown) at the four corners.

  As shown in FIG. 5, the second member 12V of the flow path switching device 11V has a square shape when viewed from the front, and is provided with bolt insertion holes 12M at its four corners. Then, the second member 12V is fixed to the mist generation device main body 30 by screwing the bolt B2 passed through the bolt insertion hole 12M into the female screw hole of the bracket 30B.

  As shown in FIG. 4, the second member 12 </ b> V is formed with a receiving portion 16 </ b> V having a circular cross section whose front side is closed and whose rear surface is open. Then, the first member 13V is received by the receiving portion 16V, and the first member 13V is sandwiched between the back surface of the receiving portion 16V and the front surface of the flange portion 38F in the mist generation device main body 30.

  The first member 13V is composed of the core member 40V and the base member 50V, as in the first embodiment. The base member 50V has a structure in which the cylindrical wall 58 projects forward from the disk-like base 50T, and the connection projection 57 projects rearward. Further, the connecting chamber 53 described in the first embodiment is formed at the central portion of the connecting protrusion 57, and the tip of the mist generating apparatus main body 30 is fitted therein. And the flow path 61 which penetrates the central part of disk-like base 50T and central hole 38D of mist generation device main part 30 are connected. In the present embodiment, the O-ring 37B is sandwiched between the front surface of the flange portion 38F and the rear surface of the connecting projection 57.

  The core member 40V has a cylindrical shape and is fitted inside the cylindrical wall 58. Further, the rear surface of the core member 40V is in surface contact with the front surface of the disk-like base 50T which is the inner surface in the cylindrical wall 58, and the front surface of the core member 40V is flush with the front surface of the cylindrical wall 58. It is in contact with the back surface of 16V. The core member 40V is fixed in the cylindrical wall 58 with an adhesive that doubles as a sealing material. Furthermore, from the outer peripheral surface of the disk-like base 50T, a plurality of finger hook projections 50S project, and it is possible to put a fingertip on them and rotate the first member 13V.

  The core member 40V is formed with a flow passage 68 which has first and second bent portions 66 and 67 and has an S shape as a whole. One end portion of the flow path 68 is disposed such that the flow path center J5 overlaps with the central axis of the core member 40V, and communicates with the flow path 61 of the base member 50V. On the other hand, the other end of the flow passage 68 is disposed at a position where the flow passage center J6 is away from the central axis of the core member 40V, and opens at the front surface of the core member 40V. Then, the first bending portion 66 is bent from one end of the flow path 68 so as to be directed in the radial direction of the core member 40V, and the second bending portion 67 is directed to the front side of the core member 40V from the first bending portion 66 And is connected to the other end of the flow path 68. Further, in the present embodiment, the above-described flow path 61 and the flow path 68 constitute a first flow path 69 according to the present invention.

  Specifically, the flow path center J7 of the first bending portion 66 is continuous at one end side with the flow path center J5 at one end of the flow path 68 and the other end side faces the radial direction of the core member 40V, and the second bending portion One end side of the flow path center J8 of 67 continues to the flow path center J6 of the other end of the flow path 68, and the other end side faces the radial direction of the core member 40V. Then, the other end of the flow path center J7 of the first bending portion 66 and the other end of the flow path center J8 of the second bending portion 67 are continuous through the inflection point, or the center of the core member 40V It is continuous across the flow path center J9 orthogonal to the axis. In addition, the radius of curvature R2, R3 of the flow path centers J7, J8 of the first and second bent portions 66, 67 is 1/2 or more (for example, 1.5 times) of the flow path diameter of the flow path 68 There is.

  Similar to the first embodiment, the core member 40V is divided into a pair of divided bodies 41, 41 by a divided plane including the flow path center of the flow path 68, and the divided bodies 41, 41 are not fixed to each other, and the core is accommodated. By fitting into the room 51 by press fitting, the split bodies 41, 41 are held in a combined state.

  The front wall 12K of the second member 12V that faces the front surface of the core member 40V corresponds to the "closing member" according to the present invention, and the front wall 12K includes a plurality of (for example, six) second flow paths 17 It penetrates back and forth. In addition, the flow channel centers of the second flow channels 17 are arranged side by side on an imaginary circle separated from the rotation center of the first member 13V. Then, the plurality of second flow paths 17 are alternatively connected to the first flow path 69 in accordance with the rotational position of the first member 13V. Further, a female screw portion is formed inside the front end portion of the second flow path 17 on the front surface of the front wall 12K, and metal pipes P are connected to the pipe joints J screwed together.

  The explanation about the composition of mist generating device 10V of this embodiment is the above. Also by the mist generating apparatus 10V of the present embodiment, the mist with an oil film can be alternatively supplied to a plurality of places ahead of the plurality of pipes P connected to the flow path switching device 11V, and It is possible to suppress the change of the particle size and the droplet formation of the mist and can be suitably fed.

Third Embodiment
The mist generating apparatus 10W of the present embodiment is shown in FIG. The flow path switching device 11W of the mist generation device 10W is a so-called three-way valve. Specifically, the receiving portion 16W provided in the second member 12W is a round hole, and the openings of the two second flow paths 17 and 17 have a predetermined angle (for example, the inner peripheral surface of the receiving portion 16W) 180 degrees) are arranged in the circumferential direction at intervals. In addition, an opening at one end of the third flow passage 71 is disposed at a central position between the openings of the two second flow passages 17 and 17. Furthermore, the connecting chamber 53 described above is formed in the second member 12W, and the tip of the mist generating apparatus main body 30 is fitted therein. The opening at the other end of the third flow passage 71 is disposed in the connection chamber 53 and is in communication with the central hole 38D of the mist generating apparatus main body 30.

  The first member 13W has, for example, a cylindrical shape, and is rotatably received in the receiving portion 16W. Further, a flow passage 72 having a bent portion 73 penetrates through the first member 13W. The openings at both ends of the flow path 72 are spaced at an angle (for example, 90 degrees) between the third flow path 71 and each second flow path 17 in the circumferential direction of the outer peripheral surface of the first member 13W. It is arranged side by side. In addition, the flow path center J12 of the bending portion 73 is bent between the both ends of the flow path 72 with a curvature radius R4 that is 1/2 or more of the flow path diameter.

  In the mist generating apparatus 10W of the present embodiment, the first flow path 72 alternatively connects the two second flow paths 17 and 17 to the third flow path 71 in accordance with the rotational position of the first member 13W. As a result, the mist with an oil film generated by the mist generating apparatus main body 30 can be alternatively supplied to a plurality of places, and the change of the particle diameter of the mist and the droplet formation of the mist are suppressed to suppress the mist. The fluid containing can be suitably supplied.

Fourth Embodiment
The mist generating device 10X of the present embodiment is shown in FIG. The first member 13X provided in the flow path switching device 11X of the present embodiment has, for example, a prismatic shape, and is accommodated linearly movable within the range of a predetermined stroke S in the prismatic receiving portion 16X of the second member 12X. ing. Moreover, the above-mentioned connection room 53 is formed in the outer surface of the 2nd member 12X, and the front-end | tip part of the mist generation apparatus main body 30 is connected. Further, one end in the longitudinal direction of the receiving portion 16X and the connection chamber 53 are connected by the flow path 78.

  In addition, a cylindrical rod 77 extends from one end surface of the first member 13X, and is fitted in the flow passage 78 of the second member 12X so as to be linearly movable. Then, the inside of the cylindrical rod 77 forms a first flow path 75, and the first flow path 75 is extended into the first member 13X, and the bending portion 74 in the middle changes the direction by 90 degrees and further extends. It is opened at the side surface parallel to the linear movement direction among the one member 13X. The radius of curvature at the center of the flow path of the bent portion 74 is 1/2 or more of the flow path diameter as in the first to third embodiments.

  In the second member 12X, a pair of second flow paths 17, 17 are provided at the same interval as the stroke S, and the openings of the second flow paths 17, 17 are disposed in the receiving portion 16X. The same effects as in the first to third embodiments are achieved also in the present embodiment in which the first flow passage 75 and either one of the second flow passages 17 communicate with each other at both ends of the linear movement range of the first member 13X. Play. The first member 13X is divided into two divided bodies by a divided surface including the center of the first flow path 75, and both divided bodies are held in a combined state by an adhesive, a bolt, or the like.

  The mist generating devices 10 to 10X and the flow path switching devices 11 to 11X of the first to fourth embodiments are used for cooling chips or tools in cutting at high processing temperatures (for example, skyving). You may use for supply of mist.

[Other embodiments]
The present invention is not limited to the above-described embodiment, and, for example, the embodiments described below are also included in the technical scope of the present invention, and various other variations are possible without departing from the scope of the invention. It can be changed and implemented.

(1) In the said embodiment, although the core member 40 was comprised from the pair of division bodies 41 and 41, you may be comprised from three or more division bodies. Also in this case, the divided bodies may be divided by a plane including the flow path center J4 of the bending portion 64.

(2) In the said embodiment, although the bending part 64 was provided only in the 1st member 13, it may be provided also in the 2nd member 12. As shown in FIG.

(3) In the said embodiment, although the bending part 64 was provided in the 1st flow path 65 of the 1st member 13 in one or two, three or more may be provided.

(4) In the above embodiment, the flow path switching device 11 is used for the flow path of the mist with oil film, but may be used for the flow path of the mist consisting only of water, or the mist of only oil It may be used for a flow path, and may be used for the flow path of the mist which consists of other liquids. Moreover, the fluid containing mist is not limited to air.

10, 10V, 10W, 10X mist generating device 11, 11V, 11W, 11X flow path switching device 12, 12V, 12W, 12X second member 13, 13V, 13W, 13X first member 16, 16V, 16W, 16X receiving portion 17 second flow path 64 bent portion 65 first flow path

Claims (5)

A first member through which one first flow path having a bending portion penetrates;
A second member having a receiving portion for receiving the first member in a movable state;
And a plurality of second flow paths which pass through the second member and have one end opened in the inner surface of the receiving portion,
By changing the relative position of the first member with respect to the second member, the first channel is alternatively connected to any second channel, and the first channel or the second channel or A flow path switching mechanism capable of supplying a fluid containing mist from the second flow path to the first flow path, wherein
The flow path switching mechanism in which the curvature radius of the flow path center of the bent portion is equal to or more than 1/2 of the flow path diameter.   At least a portion including the bent portion of the first member is divided into a plurality of divided bodies in a plane including the flow path center of the bent portion, and provided with unit holding means for holding the divided portions in a united state The flow path switching mechanism according to claim 1. The receiving portion is a round hole, and the openings of the plurality of second flow paths are disposed on the inner circumferential surface thereof,
The first member has a cylindrical portion rotatably received in the receiving portion,
The one opening of the first flow passage is disposed at the center of one end face of the cylindrical portion, and the other opening of the first flow passage is disposed on the outer peripheral surface of the cylindrical portion. The flow channel switching mechanism described in. The receiving portion is a circular hole closed at least one end by a closing member,
Openings of the plurality of second flow paths are disposed at positions away from the center of the round hole in the closing member,
The first member has a cylindrical portion rotatably received in the receiving portion,
One opening of the first flow passage is disposed at the center of one end face of the cylindrical portion, and the other opening of the first flow passage is disposed at a position away from the center of the other end face. The flow passage switching mechanism according to claim 1 or 2, wherein the first flow passage is S-shaped having two of the bent portions.   A mist generating device comprising: a nozzle including the flow path switching mechanism according to any one of claims 1 to 4 at a tip end thereof, generating a mist with an oil film and discharging the mist to the first flow path.

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