JP3205595U - Liquid discharge pipe structure of circulating cooling device - Google Patents

Abstract

An object of the present invention is to reliably prevent an end of a cylinder body and an inlet side connection member from entering a threaded portion when a liquid circulates in a circulation cooling device, and Provided is a liquid discharge pipe structure of a circulation cooling device that can be removed smoothly. In a circulating cooling device that circulates a coolant liquid whose temperature is controlled, a liquid discharge pipe structure that generates fine bubbles in the coolant liquid and discharges it to the cutting edge of a milling machine has an inlet screwed into one end of a cylinder body. Side connection member 21, discharge side connection member 22 screwed into the other end of the cylinder body 20, and spiral blade body 23 having a spiral blade 232 a on the outer periphery and built in the cylinder body 20 near the inlet side connection member 21. And a flip-flop phenomenon generating shaft 24 built in the cylinder body 20 near the discharge side connecting member 22. Between the inlet side connection member 21 and the spiral blade main body 23, a seal member 27 for preventing the coolant liquid from entering the threaded portion on the one end side of the tube main body 20 is provided. [Selection] Figure 4

Description

  The present invention supplies coolant liquid (cooling water) and cutting / grinding oil that are temperature controlled to the contact points between the cutting tool and the workpiece of various machine tools such as cutting machines and grinding machines, The present invention relates to a liquid discharge pipe structure of a circulating cooling device used when supplying lubricating oil whose temperature is controlled to a press crank, a drawing die or the like.

  In general, when processing a metal material or the like into a desired shape, a tool such as a lathe, drilling machine, or milling machine is used to apply a cutting tool such as a bite or a drill to a workpiece fixed at a predetermined position. doing.

  During this processing, for example, coolant liquid stored in a storage tank provided in the machine tool is supplied to the blade or workpiece through a pipe / nozzle by a pump, and the hardness of the cutting edge due to frictional heat is reduced. It prevents distortion and welding of the workpiece to the cutting edge, and makes it possible to easily remove chips.

  By the way, in the industry such as metal processing, a coolant liquid with higher cooling performance is supplied to the above-mentioned blades and workpieces to extend the blade life longer than before, extend the blade replacement period, and reduce the running cost. There is a demand to greatly reduce the adverse effect of frictional heat on the cutting edge and workpiece.

  Therefore, conventionally, fine bubbles are generated in the liquid sent out from the pump provided in the circulating cooling device that circulates the temperature-controlled liquid in the storage tank with the pump, such as blades and workpieces. As a liquid discharge pipe structure that discharges to an object to be cooled, for example, one previously filed by the applicant of the present application is known (see Patent Document 1).

  The liquid discharge pipe structure is provided at the other end of the cylinder main body, an inlet-side connecting member having a through-hole that is screwed to one end of the cylinder main body and opened at one end thereof, and the others. Discharge side connection member having a through-hole that opens at the end, a spiral blade body that has a spiral blade on the outer periphery and is built near the inlet side connection member of the tube body, and is built near the discharge side connection member of the tube body And a flip-flop phenomenon generating shaft body. With this liquid discharge pipe structure, liquid such as coolant liquid with higher cooling performance can be supplied to the blade or workpiece to extend the blade life longer than before, and extend the blade replacement period to greatly reduce running costs. In addition, the adverse effect of the frictional heat on the cutting edge and the workpiece can be further reduced.

JP 2004-33962 A

  However, in the proposed one, since the inlet side connecting member is screwed to one end of the cylinder body, when metal powder or the like is mixed into the liquid discharged to the object to be cooled, the liquid mixed with the metal powder is When circulating through the circulating cooling device, it penetrates into the threaded part between one end of the cylinder body and the inlet side connecting member and rusts with time, and the inlet side connecting member adheres to one end of the cylinder body and cannot be removed. Such a problem may occur.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a threaded portion between one end of the cylinder body and the inlet side connecting member when the liquid circulates in the circulating cooling device. An object of the present invention is to provide a liquid discharge pipe structure of a circulating cooling device that can reliably prevent intrusion and can smoothly remove an inlet side connection member from one end of a cylinder body.

  In order to achieve the above object, in the present invention, in a circulating cooling device that circulates a temperature-controlled liquid in a storage tank with a pump, fine bubbles are generated in the liquid sent from the pump and discharged to a cooling object. Assuming a liquid discharge pipe structure. Furthermore, the tube main body, an inlet side connecting member having a through hole that is screwed to one end portion of the tube main body and opened at the one end portion, and provided at the other end portion of the tube main body, open to the other end portion. A discharge-side connecting member having a through-hole, a spiral blade body having a spiral blade on the outer periphery and built in near the inlet-side connection member of the cylinder body, and a flip-flop built in the cylinder body near the discharge-side connection member And a shaft for generating a phenomenon. And the sealing member which prevents the penetration | invasion of the said liquid to the screwing part by the side of the one end part of the said cylinder main body is provided between the said inlet side connection member and the said spiral blade main body.

  Further, the inlet side connecting member has a flange portion that comes into contact with the end surface on the one end portion side of the cylinder main body, and is screwed to the inner peripheral surface on the one end portion side of the cylinder main body. And the said sealing member is interposed between the said inlet-side connection member and the said spiral blade main body, and the annular member which an outer peripheral surface slidably contacts with the internal peripheral surface of the said cylinder main body, and the said annular member And a seal ring that is accommodated between the distal end portion of the inlet side connection member and elastically deforms so as to be in close contact with the inner peripheral surface of the cylinder body when the inlet side connection member is screwed to the cylinder body. Good.

  Further, the inlet-side connecting member side surface of the annular member that abuts the tip of the inlet-side connecting member when the inlet-side connecting member is screwed to the cylinder body is formed as a flat surface, and the outer periphery of the inlet-side connecting member The surface is formed into a tapered surface whose diameter increases from the distal end toward the proximal end side, and the seal ring is pushed by the side surface of the inlet side connecting member of the annular member as the inlet side connecting member is screwed. The tapered surface of the side connecting member may be moved to the proximal end side.

  In short, by providing a seal member that prevents liquid from entering the threaded portion on the one end side of the cylinder body between the inlet side connecting member and the spiral blade body threaded on one end of the cylinder body. Even if metal powder or the like is mixed in the liquid discharged to the object to be cooled, when the liquid mixed with the metal powder circulates in the circulating cooling device, the screw between the one end of the cylinder body and the inlet side connection member It is possible to reliably prevent the entrance portion from entering, and to smoothly remove the inlet side connecting member from one end of the cylinder body.

  The seal member is interposed between the inlet-side connecting member screwed to the inner peripheral surface on the one end portion side of the cylinder body and the spiral blade body, and the outer peripheral surface is in sliding contact with the inner peripheral surface of the cylinder body. A seal ring that is accommodated between the member and the distal end portion of the inlet-side connecting member facing the annular member and elastically deforms so as to be in close contact with the inner peripheral surface of the cylinder body when the inlet-side connecting member is screwed. By providing, the seal ring is elastically deformed between the annular member and the inlet side connecting member so as to be in close contact with the inner peripheral surface of the cylindrical body when the inlet side connecting member is screwed to one end of the cylindrical body. Thereby, the penetration | invasion of the liquid in which the metal powder mixed into the screwing part of the one end part of a cylinder main body and an inlet side connection member can be prevented more reliably.

  Furthermore, the seal ring accommodated between the tapered surface that expands in diameter from the distal end of the inlet side connecting member to the proximal end side and the inner peripheral surface of the cylindrical main body is connected to the annular member along with the screwing of the inlet side connecting member. By moving the tapered surface of the outer peripheral surface of the inlet-side connecting member toward the base end side by being pushed by the side surface of the flat inlet-side connecting member, the seal ring is located between the annular member and the inlet-side connecting member. It is elastically deformed to ensure close contact with the surface. Thereby, it is possible to more reliably prevent the intrusion of the liquid mixed with the metal powder into the threaded portion between the one end portion of the cylinder main body and the inlet side connection member.

It is a schematic block diagram of the circulation cooling device using the liquid discharge pipe structure which concerns on this invention. FIG. 2 is a perspective view of the liquid discharge pipe structure in FIG. 1. FIG. 3 is an exploded perspective view of the liquid discharge pipe structure of FIG. 2. It is a longitudinal cross-sectional view of the liquid discharge pipe structure of FIG. It is explanatory drawing of the spiral blade formed in the spiral blade main body of the liquid discharge pipe structure of FIG. FIG. 5 is an explanatory diagram showing a large number of rhombus-shaped convex portions having regularity of a shaft body for generating a flip-flop phenomenon in the liquid discharge pipe structure of FIG. 4. It is explanatory drawing which shows the rhombus convex part of the shaft body for flip-flop phenomenon generation | occurrence | production of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiment is an example embodying the present invention, and is not intended to limit the technical scope of the present invention.

  FIG. 1 shows a schematic configuration diagram of a circulating cooling device using a liquid discharge pipe structure according to the present invention.

  In FIG. 1, reference numeral 1 denotes a circulating cooling device. This circulating cooling device 1 is for a cutting edge (not shown) as a cooling object of a milling machine 11 that cuts a material, digs a surface, or holds a surface. A coolant liquid is supplied from the nozzle 10. Under the milling machine 11, a tray 12 for collecting the coolant liquid supplied to the cutting edge is provided.

  The circulating cooling device 1 also includes a chiller cooling device 14 that cools the coolant stored in the storage tank 13 to a constant temperature. The chiller cooling device 14 collects the coolant liquid collected in the tray 12 in the storage tank 13 and cools it to a constant temperature.

  Furthermore, the circulating cooling device 1 includes a filter 15 that filters the coolant liquid cooled to a constant temperature by the chiller cooling device 14, an electric pump 16 that pumps and circulates the coolant liquid filtered by the filter 15, and the electric A liquid discharge pipe structure 2 that generates fine bubbles from the coolant liquid pumped by the pump 16 and discharges the fine liquid from the nozzle 10 to the cutting edge of the milling machine 11 is provided. In this case, a filter having a filtration degree of about 200 microns is used as the filter 15.

  2 is a perspective view of the liquid discharge pipe structure, FIG. 3 is an exploded perspective view of the liquid discharge pipe structure, and FIG. 4 is a longitudinal sectional view of the liquid discharge pipe structure.

  As shown in FIGS. 2 to 4, the liquid discharge pipe structure 2 includes a cylinder body 20, an inlet-side connecting member 21 having a through hole 211 that penetrates the center portion, and a through hole 221 that penetrates the center portion. A discharge-side connecting member 22, a spiral blade body 23, and a flip-flop phenomenon generating shaft 24 are provided.

  The cylinder body 20 is a straight cylindrical metal tube formed with a predetermined diameter and length, and the inlet side connection member 21 and the discharge side connection member 22 are screwed onto the inner peripheral surface of one end and the other end thereof. Female screws 201 and 202 that are screwed together are formed.

  The inlet-side connecting member 21 includes a flange portion 212 that comes into contact with an end surface on the one end portion side of the tube main body 20 and a male screw 213 that is screwed to the female screw 201 on the one end portion side of the tube main body 20. Further, on the base end side (the flange portion 212 side) of the through hole 211 of the inlet side connection member 21, a female screw 214 for screwing another pipe is provided, and the through hole 211 of the inlet side connection member 21 is provided. On the distal end side, an inner tapered surface 215 (inner peripheral surface) is formed which increases in diameter as it goes to the distal end of the inlet side connecting member 21.

  The discharge-side connecting member 22 includes a flange portion 222 that comes into contact with the end surface on the other end side of the cylinder main body 20 and a male screw 223 that is screwed to the female screw 202 on the other end side of the cylinder main body 20. . Further, on the base end side (the flange 222 side) of the through hole 221 of the discharge side connection member 22, a female screw 224 for screwing another pipe is provided, and the through hole 221 of the discharge side connection member 22 is provided. An inner tapered surface 225 (inner peripheral surface) whose diameter increases as it goes to the distal end of the discharge side connecting member 22 is formed on the distal end side.

  The spiral blade body 23 is obtained by processing a short metal cylindrical member having an outer diameter close to the inner peripheral surface of the cylinder body 20 when the spiral blade body 23 is housed in the cylinder body 20. It consists of a circular shaft portion 231 and three spiral blades 232a, 232b, 232c. The blades 232a, 232b, and 232c are positioned with their respective end positions shifted by 120 degrees in the circumferential direction of the shaft portion 231 and are spaced apart from each other by a predetermined interval from one end to the other end of the shaft portion 231. It is spirally formed clockwise.

  FIG. 5 shows an explanatory view of the spiral blade formed in the spiral blade body 23 of the liquid discharge pipe structure 2. In FIG. 5, each blade 232a, 232b, 232c is formed in a spiral shape on the outer peripheral surface of the shaft portion 231 at an angle of 75 ° to 76 ° with respect to the horizontal line 29 in the drawing when viewed in plan. The groove width, which is the interval between the blades 232a, 232b, and 232c, is 8 mm, the thickness of each blade 232a, 232b, and 232c is 2 mm, and the shaft portion from the radially outer end of each blade 232a, 232b, and 232c. The depth to the outer peripheral surface of 231 is set to 9 mm. Moreover, the circumferential direction both ends of each blade | wing 232a, 232b, 232c are formed in the blade shape at the acute angle.

  FIG. 6 is an explanatory view showing a large number of rhombus convex portions with regularity of the flip-flop phenomenon generating shaft 24 of the liquid discharge pipe structure 2, and FIG. 7 is a diamond of the flip-flop phenomenon generating shaft 24. Explanatory drawing which shows a convex part is shown, respectively.

  6 and 7, the shaft 24 for generating the flip-flop phenomenon has an outer diameter that is close to the inner peripheral surface of the cylindrical main body 20 when stored, and is about 4/5 of the length of the cylindrical main body 20. The cylindrical member made of metal is processed. On the outer peripheral surface of the shaft portion 240 having a circular cross section of the shaft body 24 for generating the flip-flop phenomenon, a large number of rhombus convex portions 241, 241,... Are formed with a predetermined regularity.

  That is, the flip-flop phenomenon generating shaft 24 has one end portion (the right end portion in FIG. 4) located on the spiral blade body 23 side when formed in the cylinder body 20 having a truncated cone shape. The other end portion (left end portion in FIG. 4) located on the discharge side connecting member 22 side is formed in a conical shape. The other end portion of the shaft body 24 for generating the flip-flop phenomenon is located within the inner tapered surface 225 of the discharge side connecting member 22 with the top portion 242 formed at 90 °, and has a certain distance from the inclined inner surface of the inner tapered surface 225. Therefore, it is made to oppose. At this time, the flip-flop phenomenon generating shaft 24 abuts against the distal end surface of the discharge-side connecting member 22 when housed in the cylinder body 20, and further movement toward the discharge-side connecting member 22 is restricted. Yes. In this case, the inner tapered surface 225 of the discharge-side connecting member 22 is also formed at the same 90 ° as the top portion 242 of the flip-flop phenomenon generating shaft 24.

  Further, each rhombus convex portion 241 of the flip-flop phenomenon generating shaft body 24 is formed so as to protrude radially outward from the outer peripheral surface of the shaft portion 240 by grinding a cylindrical member.

  That is, each rhombus convex portion 241 includes a plurality of lines 25 having a constant interval in a direction (circumferential direction) of 90 ° with respect to the longitudinal direction of the cylindrical member, and 60 ° ( Or lines 26 at regular intervals with an angle of 62 °), intersecting between the lines 25 and 26 and grinding one by one and between the diagonal lines 26 and 26 one by one. Are formed so as to protrude from the outer peripheral surface of the shaft portion 240 one by one in the vertical direction (circumferential direction) and right and left (longitudinal direction of the shaft portion 240).

  By forming each rhombus convex portion 241 in this way, a large number of rhombus convex portions 241, 241,... Are formed on the outer peripheral surface of the shaft portion 240 side by side between the both end portions with a predetermined regularity. Has been.

  Further, between the inlet side connecting member 21 and the spiral blade body 23, the penetration of the coolant liquid into the screwed portion between the female screw 201 on one end side of the tube main body 20 and the male screw 213 of the inlet side connecting member 21 is prevented. A sealing member 27 is provided.

  The seal member 27 is interposed between the inlet side connection member 21 and the spiral blade main body 23, and has an annular member 271 whose outer peripheral surface is in sliding contact with the inner peripheral surface of the tube main body 20, and the annular member 271 and the inlet side connection. A resin that is interposed between the member 21 and elastically deforms so as to be in close contact with the inner peripheral surface (the other end side of the female screw 201) of the cylinder body 20 when the inlet side connection member 21 is screwed to the cylinder body 20. The seal ring 272 is provided. In this case, the seal ring 272 has a substantially circular cross section.

  Furthermore, the side surface of the inlet-side connecting member 21 of the annular member 271 that abuts the tip of the inlet-side connecting member 21 when the inlet-side connecting member 21 is screwed to the cylinder body 20 is formed as a flat surface orthogonal to the axis. Yes. Further, the seal ring 272 is accommodated between the outer tapered surface 273 whose outer peripheral surface is increased in diameter from the distal end of the inlet side connecting member 21 toward the proximal end side and the inner peripheral surface of the cylindrical main body 20. The seal ring 272 is pushed by the side surface of the inlet side connection member 21 of the annular member 271 as the inlet side connection member 21 is screwed, so that the outer tapered surface 273 of the inlet side connection member 21 moves to the proximal side. It has become.

  Thus, the cylinder body 20, the inlet side connection member 21, the discharge side connection member 22, the spiral blade body 23, the flip-flop phenomenon generating shaft body 24, and the seal member 27 (the annular member 271 and the seal ring 272). The liquid discharge pipe structure 2 is configured by screwing and attaching a discharge-side connecting member 22 to the other end of the cylinder main body 20, and the flip-flop phenomenon generating shaft 24 is inserted into the cylinder main body 20 from one end side. The conical top 242 is inserted, the spiral blade body 23 is inserted, the annular member 271 and the seal ring 272 are inserted, and finally the inlet side connection member 21 is screwed onto one end of the tube body 20 and attached. .

  At this time, one end (right end in FIG. 4) of the truncated cone of the shaft body 24 for generating the flip-flop phenomenon comes into contact with one side (left end in FIG. 4) of the spiral blade body 23. The spiral blade body 23 is in contact with the distal end surface of the inlet side connection member 21 screwed into one end side of the cylinder body 20 via the annular member 271 and is sandwiched between the flip-flop phenomenon generating shaft body 24 and sandwiched between the cylinder body 2 will be stored.

  In the liquid discharge pipe structure 2 assembled in this way, as shown in FIG. 1, the threaded male screw at the end of the pipe 19 is screwed into the female screw 214 (see FIG. 4) of the through hole 211 of the inlet side connecting member 21. The threaded male screw at the upstream end of the nozzle 10 led to the cutting edge side of the milling machine 11 that supplies coolant liquid and the like is screwed into the female screw 224 (see FIG. 4) of the through-hole 221 of the discharge-side connecting member 22 and connected. To do.

  Here, a flow when the coolant liquid circulated by the circulation cooling device 1 and supplied from the nozzle 10 to the cutting edge of the milling machine 11 passes through the liquid discharge pipe structure 2 will be described.

  The coolant liquid supplied to the cutting edge and collected in the tray 12 at the lower part of the milling machine 11 is stored in the storage tank 13, cooled to a constant temperature by the chiller cooling device 14, filtered by the filter 15, and the inlet side by the electric pump 16. The pressure is fed from the through hole 211 of the connecting member 21. The coolant liquid flowing in from the through hole 211 of the inlet side connection member 21 passes between the blades 232a, 232b, and 232c formed in the counterclockwise direction of the spiral blade body 23. At this time, the coolant liquid becomes a strong tornado flow by the blades 232a, 232b, and 232c, and is sent to one end side (right side in FIG. 4) of the truncated cone of the flip-flop phenomenon generating shaft 24. In the space between the one end and the cylinder body 20, the pulsating flow is adjusted by the familiarity of the coolant liquid or the like. Then, the coolant liquid is sent between a plurality of rhombus convex portions 241, 241,... With a predetermined regularity formed on the outer peripheral surface of the shaft portion 240 (a plurality of flow paths).

  The coolant liquid that passes between a large number of regular rhombic projections 241, 241,... Becomes a turbulent flow and generates innumerable minute vortices (a flip-flop phenomenon is a direction in which a liquid flows). Is caused to flow to the other end side (left side in FIG. 4) of the shaft body 24 for generating a flip-flop phenomenon. The coolant or the like flowing into the other end of the flip-flop phenomenon generating shaft 24 causes the flip-flop phenomenon to be erased by the generation of a tornado flow that exceeds the flip-flop phenomenon due to the size of the gap space with the discharge-side connecting member 22. However, the Coanda effect (a phenomenon in which when the liquid flows along the wall surface, the phenomenon in which the liquid is attracted to the wall surface due to the pressure drop between the liquid and the wall surface) is amplified, and the entanglement phenomenon is induced. It is discharged from the through hole 221.

  When the coolant liquid discharged from the liquid discharge pipe structure 2 is supplied to the cutting edge of the milling machine 11 from the nozzle 10, it is tangled and entangled due to the Coanda effect or the like, and the clinging phenomenon is noticeable. Adhesion is increased by covering the surface of 11 cutting edges. Therefore, even if the rotation of the cutting edge of the milling machine 11 becomes high speed, it is scattered to some extent, but the remaining coolant liquid is entangled with the cutting edge and the material of the milling machine 11, and the cooling effect becomes higher than before due to the large amount of entangled coolant liquid. .

  In this way, by providing the liquid discharge pipe structure 2 of the present invention in the coolant liquid supply line of the circulating cooling device 1, not only the rotation of the cutting edge of the normal milling machine 11 but also the normal high-speed rotation of about 10 times. Even after processing, the cutting edge and material hardly generate heat. In addition, by providing the liquid discharge pipe structure 2 within 1.5 m from the tip of the nozzle 10, it is possible to effectively exhibit the cooling capacity.

  Therefore, in the present embodiment, the coolant liquid enters the threaded portion on the one end side of the cylinder body 20 between the inlet side connection member 21 screwed into the one end portion of the cylinder body 20 and the spiral blade body 23. Since the blocking sealing member 27 is provided, even when metal powder or the like is mixed in the coolant liquid discharged to the cutting edge of the milling machine 11, the coolant liquid mixed with the metal powder circulates in the circulating cooling device 1. In addition, it is possible to reliably prevent the one end portion of the tube main body 20 and the inlet side connecting member 21 from entering the screwed portion, and to smoothly remove the inlet side connecting member 21 from the one end portion of the tube main body 20.

  In addition, the seal member 27 includes an annular member 271 interposed between the inlet-side connecting member 21 screwed into the female screw 201 on one end side of the cylinder body 20 and the spiral blade body 23, and the annular member 271 and the inlet side. It is accommodated between the outer tapered surface 273 that expands in diameter from the distal end of the connecting member 21 toward the proximal end side and the inner peripheral surface of the cylindrical main body, and on the inner peripheral surface of the cylindrical main body 20 when the inlet-side connecting member 21 is screwed. Since the seal ring 272 that is elastically deformed so as to be in close contact is provided, the seal ring 272 is interposed between the annular member 271 and the inlet side connection member 21 when the inlet side connection member 21 is screwed to one end of the cylinder body 20. Is elastically deformed so as to be in close contact with the inner peripheral surface of the cylinder body 20. As a result, it is possible to more reliably prevent the coolant liquid from entering the threaded portion between the one end portion of the tube main body 20 and the inlet side connection member 21.

  In addition, this invention is not limited to the said embodiment, The other various modifications are included. For example, in the present embodiment, the coolant liquid circulating in the circulating cooling device is discharged to the cutting edge of the milling machine 11, but a machining center, NC milling machine, general-purpose milling machine, NC lathe, general-purpose lathe, polishing machine, spindle coolant through type machine It can be used in a lubricating oil supply line for dedicated machines, transfer machines, radial drilling machines, cutting machines, band saws, other cutting / grinding machines, engine cranks, press cranks and drawing dies. Of course, it can also be used for devices and machines other than these and supply lines for various fluids.

  In this embodiment, the coolant is circulated by the circulating cooling device, but the cutting / grinding oil whose temperature is controlled at the contact point between the cutting tool and the workpiece of various machine tools such as a cutting machine and a grinding machine. Etc., or temperature-controlled lubricating oil or the like may be circulated in an engine crank, a press crank, a drawing die, or the like.

  Furthermore, each numerical value of the example illustrated in the present embodiment is an optimal example, and for example, the angle of both apexes of the rhombus convex portion is not limited to 28 °, and the design may be changed to another angle. When the shaft portion is viewed in plan, the angle with respect to the horizontal line is not limited to 75 ° to 76 °, but may be 75 ° or less or 76 ° or more. The same applies to the spiral blade.

1 Circulating Cooling Device 13 Storage Tank 16 Electric Pump (Pump)
2 Liquid discharge pipe structure 20 Cylinder main body 21 Inlet side connection member 211 Through hole 212 ridge part 22 Discharge side connection member 221 Through hole 23 Spiral blade main body 232a, 232b, 232c
Spiral blade 24 Flip-flop phenomenon generating shaft 27 Seal member 271 Annular member 272 Seal ring

Claims (3)

In the circulating cooling device that circulates the temperature-controlled liquid in the storage tank with a pump, a liquid discharge pipe structure that generates fine bubbles with respect to the liquid sent from the pump and discharges it to the object to be cooled,
A cylinder main body, an inlet-side connecting member having a through hole that is screwed to one end of the cylinder main body and opens at one end thereof, and a through hole that is provided at the other end of the cylinder main body and opens at the other end A discharge-side connecting member having a spiral blade on the outer periphery, and being incorporated near the inlet-side connection member of the cylinder body, and a flip-flop phenomenon incorporated near the discharge-side connection member of the cylinder body A generating shaft,
A circulation member is provided between the inlet side connecting member and the spiral blade main body, and a sealing member is provided to prevent the liquid from entering a threaded portion on one end side of the cylinder main body. Liquid discharge pipe structure of the apparatus. The inlet side connecting member has a flange portion that comes into contact with an end surface on one end portion side of the cylinder body, and is screwed to an inner peripheral surface on one end portion side of the cylinder body,
The seal member is interposed between the inlet-side connecting member and the spiral blade main body, and has an annular member whose outer peripheral surface is in sliding contact with the inner peripheral surface of the cylindrical main body, and the inlet side facing the annular member 2. A seal ring that is housed between a distal end portion of a connection member and elastically deforms so as to be in close contact with an inner peripheral surface of the cylinder body when the inlet side connection member is screwed to the cylinder body. A liquid discharge pipe structure of the circulating cooling device according to 1. The side surface of the inlet side connecting member of the annular member that contacts the tip of the inlet side connecting member when the inlet side connecting member is screwed to the cylinder body is formed as a flat surface,
The outer peripheral surface of the inlet side connection member is formed into a tapered surface that increases in diameter from the distal end toward the proximal end side, and the seal ring is connected to the inlet side connection member of the annular member as the inlet side connection member is screwed. The liquid discharge pipe structure of the circulating cooling device according to claim 2, wherein the liquid discharge pipe structure is moved by a side surface to a proximal end side of the tapered surface of the inlet side connection member.

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