WO2007037367A1 - 管継手、冷凍装置、ヒートポンプ式給湯機、閉鎖弁、給水配管、配管の接続方法、及び現地配管施工方法 - Google Patents
管継手、冷凍装置、ヒートポンプ式給湯機、閉鎖弁、給水配管、配管の接続方法、及び現地配管施工方法 Download PDFInfo
- Publication number
- WO2007037367A1 WO2007037367A1 PCT/JP2006/319456 JP2006319456W WO2007037367A1 WO 2007037367 A1 WO2007037367 A1 WO 2007037367A1 JP 2006319456 W JP2006319456 W JP 2006319456W WO 2007037367 A1 WO2007037367 A1 WO 2007037367A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- joint
- sleeve
- joint body
- fastening member
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
- F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
- F16L19/14—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered the rings being integral with one of the connecting parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
- F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/54—Water heaters for bathtubs or pools; Water heaters for reheating the water in bathtubs or pools
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49925—Inward deformation of aperture or hollow body wall
- Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force
Definitions
- the present invention relates to a pipe joint for joining refrigerant pipes, for example, and a refrigeration apparatus using the pipe joint
- the present invention relates to a heat pump water heater, a shut-off valve, a water supply pipe, a pipe connection method, and a local pipe construction method.
- FIG. 16 shows a bite joint shown in the prior art of Patent Document 1.
- This bite joint is constituted by a joint body 101, a nut 102, and a sleeve 103 provided between the joint body 101 and the nut 102.
- the sleeve 103 is attached to the outer peripheral surface 104 a of the pipe 104.
- the distal end portion 104b of the pipe 104 is inserted into the joint hole 101a of the joint body 101, and the thread portion 102a of the nut 102 is screwed into the thread portion 101b of the joint body 101.
- the sleeve 103 receives a pressing force from the pressing surface 102 b of the nut 102 at the base end surface 103 a and receives a pressing force from the tapered surface 101 c of the joint body 101. For this reason, the leading end portion 103 b of the sleeve 103 bites into the outer peripheral surface 104 a of the pipe 104, and the pipe 104 is joined to the joint hole 101 a of the joint body 101. In this way, the bite joint secures the sealing performance of the joint portion between the pipe 104 and the joint body 101 by the sleeve 103 biting into the pipe 104.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-74768 Disclosure of the invention
- An object of the present invention is to provide a pipe joint that can prevent loss of a sleeve, improve workability at the time of joining pipes, and ensure sealing performance of a joint, and a refrigeration apparatus using the pipe joint It is to provide a pipe connection method and the like.
- a joint body in which a joint hole for joining pipes is formed, a fastening member fastened to the joint body, and a fastening member in a state where the pipe is inserted into the joint hole A pipe joint provided with a sleeve that eats into the outer periphery of the pipe when fastened to the joint body is provided.
- the sleeve is provided integrally with the joint body or the fastening member before the fastening member is fastened to the joint body, and is separated from the joint body or the fastening member by fastening the fastening member to the joint body.
- the outer periphery of the pipe is eroded by fastening the fastening member to the joint body!
- the sleeve to be inserted is provided integrally with the joint body or the fastening member before the fastening member is fastened to the joint body. Therefore, compared to the case where the sleeve is configured separately from the joint body or the fastening member as in the prior art, the sleeve can be prevented from being lost until the pipe is joined. There is no need to keep it as. Also, since the sleeve does not need to be assembled when the pipes are joined, the workability when connecting the pipes is improved.
- the sleeve is provided integrally with the joint body or the fastening member, it is possible to suppress the biting site of the sleeve from being exposed to the outside of the joint body or the fastening member. For this reason, when the pipe joint is handled, for example, a portion of the sleeve that bites into the pipe can be hardly damaged. For this reason, the fitting of the pipe joint is damaged by the damage of the sleeve. It can suppress that the sealing performance of a joint part deteriorates.
- the sleeve Since the sleeve is cut and separated from the joint body or the fastening member by fastening the fastening member to the joint body, the separated sleeve is eaten on the outer periphery of the pipe as in the conventional configuration. In other words, the pipe can be joined to the joint hole of the joint body while ensuring the sealing performance of the joint.
- a refrigeration apparatus in which the pipe joint is used for a connection part of a refrigerant pipe. According to this configuration, it is possible to obtain a refrigeration apparatus that prevents the sleeve from being lost and improves the workability at the time of joining the pipes while ensuring the sealing performance of the joint.
- a heat pump type water heater in which the pipe joint is used for a connection portion of a refrigerant pipe. According to this configuration, it is possible to obtain a heat pump type hot water heater that prevents the sleeve from being lost and improves the workability at the time of joining the pipes while ensuring the sealability of the joint.
- shut-off valve in which the pipe joint is used for a pipe connection. According to this configuration, it is possible to obtain a closing valve that prevents the sleeve from being lost and improves the workability at the time of joining the pipes while ensuring the sealing performance of the joint.
- a water supply pipe is provided in which the pipe joint is used as a pipe connection. According to this configuration, it is possible to obtain a water supply pipe that prevents the sleeve from being lost and improves workability at the time of joining the pipes while ensuring the sealing performance of the joint portion.
- a joint body in which a joint hole for joining pipes is formed, a fastening member fastened to the joint body, and fastening in a state where the pipe is inserted into the joint hole.
- a pipe connection method including a sleeve that eats into the outer periphery of the pipe by fastening the member to the joint body. Before the fastening member is fastened to the joint body, the sleeve is provided integrally with the joint body or the fastening member.
- the connection method includes a step of inserting piping into the joint hole of the joint body, a step of separating the sleeve by cutting the joint body or the fastening member by a fastening operation of the fastening member to the joint body, and a joint body of the fastening member. And a step of biting the sleeve into the outer periphery of the pipe by the fastening operation.
- an on-site piping construction method in which a piping construction is performed at a construction site using the piping connection method. According to this configuration, since the piping work is performed by the fastening operation of the fastening member to the joint body, etc., it is possible to construct the pipe safely and easily without using the equipment for brazing. .
- FIG. 1 is a partial cross-sectional view showing a configuration of a pipe joint according to a first embodiment.
- FIG. 2 is a partial cross-sectional view showing a joint body.
- FIG. 3 is a partial sectional view showing a nut.
- FIG. 4 (a) is a cross-sectional view showing a state before the sleeve is cut, (b) is a cross-sectional view showing a state after the sleeve is separated, and (c) is a state when the sleeve bites into the pipe.
- FIG. 5 is a graph showing the amount of leakage from the joint and the torque coefficient with respect to the biting coefficient.
- FIG. 6 (a) is a cross-sectional view showing a state before the sleeve according to the second embodiment is cut, (b) is a cross-sectional view showing a state after the sleeve is separated, and (c) is a pipe where the sleeve is piped. Sectional drawing which shows the state when it bites into.
- FIG. 7 (a) is a cross-sectional view showing a state before the sleeve according to the third embodiment is cut, (b) is a cross-sectional view showing a state after the sleeve is separated, and (c) is a pipe where the sleeve is piped. Sectional drawing which shows the state when it bites into.
- FIG. 8 (a) is a cross-sectional view showing a state before the sleeve according to the fourth embodiment is cut, (b) is a cross-sectional view showing a state after the sleeve is separated, and (c) is a pipe where the sleeve is piped. Sectional drawing which shows the state when it bites into.
- FIG. 9 is a partial sectional view showing a pipe joint using the configuration according to the first embodiment at both ends.
- FIG. 10 is a partial cross-sectional view showing a pipe joint that connects pipes having different outer diameters using the configuration according to the first embodiment at both ends.
- FIG. 11 is a cross-sectional view showing a pipe joint for connecting a plurality of pipes using the configuration according to the first embodiment.
- FIG. 12 is a schematic diagram showing a connection state between a plurality of pipes and branch pipes.
- FIG. 13 is a cross-sectional view showing a shut-off valve using a pipe joint according to the present invention.
- FIG. 14 is a schematic diagram showing a refrigerant pipe connection state between an indoor unit and an outdoor unit of an air conditioner.
- FIG. 15 (a) is a schematic diagram showing a connection state of piping of a heat pump type hot water heater, and (b) is a schematic diagram showing a connection state of piping of a heat pump type hot water heater in another example.
- FIG. 16 is a cross-sectional view showing a configuration of a pipe joint according to a conventional example.
- FIG. 1 is a partial cross-sectional view showing a configuration of a pipe joint.
- Pipe fitting 1 connects pipes 11 and 12 and has a tubular body 13 into which pipes 11 and 12 are inserted, and nut 14 as a fastening member screwed into joint body 13. And a sleeve 15 having an annular shape, which is interposed between the joint body 13 and the nut 14 when the pipes are joined.
- a pipe 11 is fixed to the joint body 13 by, for example, brazing, in a socket part 13a formed at the tip of the joint body 13.
- the distal end portion 12a of the pipe 12 to be joined to the joint body 13 is inserted into the joint hole 13b formed in the base end portion of the joint body 13.
- FIG. 2 is a partial cross-sectional view showing the joint body 13.
- the joint body 13 is formed on the socket part 13a to which the pipe 11 is fixed, the joint hole 13b into which the pipe 12 is inserted, the male thread part 13c to which the nut 14 is screwed, the guide surface 13d, and the outer peripheral surface of the joint body 13. And has a nut portion 13e.
- the guide surface 13d guides the outer peripheral surface 15c of the sleeve 15 when the sleeve 15 bites into the pipe 12.
- the socket portion 13a has a circular hole shape and an inner diameter that is substantially equal to the outer diameter of the pipe 11 to be fixed.
- the joint hole 13b has a circular hole shape and an inner diameter DO substantially equal to the outer diameter Dp of the pipe 12 to be inserted.
- the socket portion 13a and the joint hole 13b communicate with each other through the internal space 13f.
- the male screw portion 13c has a screw shape at a location corresponding to the joint hole 13b and the internal space 13f on the outer peripheral surface of the joint body 13 so as to be screwed into the nut 14.
- the guide surface 13d is located at the base end portion of the joint body 13, that is, the inlet of the pipe 12 in the joint hole 13b, and the inward force is also expanded in diameter according to the outward force.
- the guide surface 13d guides the outer peripheral surface 15c of the sleeve 15 when the nut 14 is screwed into the joint body 13, and the sleeve 15 bites into the outer peripheral surface 12b of the pipe 12.
- the joint body 13 can be held when the nut 14 is screwed into the joint body 13.
- FIG. 3 is a partial cross-sectional view showing the nut 14.
- the nut 14 has a female screw portion 14 a that is screwed with the male screw portion 13 c of the joint body 13, and a holding hole 14 b that holds the outer periphery of the pipe 12.
- the nut 14 is provided with a sleeve 15 as a body.
- the female screw portion 14a is formed on the inner peripheral surface of the tip portion screwed into the joint main body 13 in the nut 14.
- the holding hole 14b is formed at the base end portion of the nut 14 and has a circular hole shape. Further, the holding hole 14b has an inner diameter substantially equal to the outer diameter Dp of the pipe 12 to be held.
- the sleeve 15 of the present embodiment is processed integrally with the nut 14 and is formed on the inner peripheral surface of the base end portion of the nut 14. As shown in FIG. 3, the tip of the sleeve 15 is located in the nut 14, and the sleeve 15 is configured not to be exposed outward from the nut 14. Thereby, it is possible to prevent the sleeve 15 from being damaged when the nut 14 is handled.
- the sleeve 15 has an inner peripheral surface 15b with respect to the pipe 12, an outer peripheral surface 15c as a guided surface guided by the guide surface 13d of the joint body 13 when the sleeve 15 bites into the pipe 12, and the pipe 12 And a base end face 15d that receives a pressing force when biting in.
- the inner peripheral surface 15b has an inner diameter substantially equal to the outer diameter Dp of the pipe 12.
- the outer peripheral surface 15c increases in diameter as the distal end force of the sleeve 15 also moves toward the proximal end.
- the inclination angle ⁇ of the outer peripheral surface 15c with respect to a straight line extending along the fastening direction of the nut 14 is set smaller than the inclination angle ⁇ of the guide surface 13d with respect to the straight line.
- the inclination angle ⁇ of the outer peripheral surface 15c is set to be larger than the half angle of the inclination angle ⁇ of the guide surface 13d. This prevents the pressing angle from the guide surface 13d from being applied to the sleeve 15 efficiently because the inclination angle ⁇ becomes excessively small.
- the inclination angle at of the guide surface 13d of the joint body 13 is preferably set to 15 ° or more and 30 ° or less in order to smoothly guide the tip 15a of the sleeve 15 20 ° or more and 25 ° More preferably, the following is set.
- the tip 15g of the sleeve 15 that bites into the pipe 12 has a sharp edge shape. As a result, the sleeve 15 surely bites into the pipe 12 and the sealing performance at the site where the sleeve 15 bites into the pipe 12 is improved.
- the base end surface 15d is opposed to a contact portion 14c formed on the distal end side of the nut 14 with respect to the holding hole 14b on the inner peripheral surface of the nut 14.
- the base end face 15d receives the pressing force from the abutting portion 14c after the sleeve 15 is separated from the nut 14, thereby causing the tip end portion 15a to bite into the outer peripheral surface 12b of the pipe 12.
- the sleeve 15 is provided integrally with the nut 14 at the base portion 15e.
- the base 15e of the sleeve 15 is formed thin. Therefore, the base 15e is cut and the sleeve 15 can be easily separated from the nut 14.
- the sleeve 15 is formed of a material having a hardness equal to or higher than the hardness of the material forming the pipe 12.
- the sleeve 15 is made of brass or stainless steel, and when the pipe 12 is made of stainless steel, the sleeve 15 is made of stainless steel.
- the sleeve 15 can easily bite into the pipe 12, and the sealing performance at the site where the sleeve 15 bites into the pipe 12 can be improved.
- FIG. 4A to 4C are cross-sectional views showing the operation around the sleeve 15 of the pipe joint 1.
- FIG. 1 When the pipe 12 is joined to the fitting body 13, first, the nut 14 is held in the holding hole 14b. The pipe 12 is inserted, and the tip 12 a of the pipe 12 is inserted into the joint hole 13 b of the joint body 13. Then, with the nut portion 13e of the joint body 13 held, the female thread portion 14a of the nut 14 is screwed into the male thread portion 13c of the joint body 13 as shown in FIG. 4 (a).
- the cut surface 14d of the nut 14 and the cut surface 15f of the sleeve 15 are formed along the thickness direction of the base portion 15e of the sleeve 15, that is, the screwing direction of the nut 14.
- the cutting surfaces 14d and 15f are formed along substantially the same direction as the direction in which the shearing force acts, the base portion 15e can be easily cut by screwing the nut 14.
- the nut 14 and the sleeve 15 are separated by cutting the base portion 15e of the sleeve 15.
- the guide surface 13d of the joint body 13 comes into contact with a part of the outer peripheral surface 15c of the sleeve 15, and the contact portion 14c of the nut 14 is brought into contact with the base end surface 15d of the sleeve 15. Abut.
- the base end surface 15d of the sleeve 15 receives a pressing force from the contact portion 14c of the nut 14, and the outer peripheral surface 15c of the sleeve 15 is guided by the guide surface 13d of the joint body 13.
- the tip 15 a of the sleeve 15 bites into the outer peripheral surface 12 b of the pipe 12.
- the cut surface 14d of the nut 14 is formed on the outer peripheral surface of the base end portion of the joint body 13 until the nut 14 and the sleeve 15 are separated and until the sleeve 15 bites into the pipe 12.
- the escape portion 13g is configured to be separated from the joint body 13.
- the cut surface 15f of the sleeve 15 is configured to be separated from the nut 14 by a concave portion 14e formed on the tip end side of the nut 14 relative to the contact portion 14c on the inner peripheral surface of the nut 14. It has been done. This avoids the situation where the cut surfaces 14d and 15f come into contact with the joint body 13 or the nut 14 and the nut 14 is not sufficiently screwed into the joint body 13 and the sleeve 15 does not sufficiently bite into the pipe 12. it can.
- the pipe joint 1 joins the pipe 12 to the joint body 13 by causing the tip 15a of the sleeve 15 to bite into the outer peripheral surface 12b of the pipe 12.
- the tip of sleeve 15 The gap between the tip 15a of the sleeve 15 and the outer peripheral surface 12b of the pipe 12 is sealed by the biting of the end 15a.
- the outer peripheral surface 15c of the sleeve 15 and the guide surface 13d of the joint body 13 are in close contact with each other, so that the space between the outer peripheral surface 15c of the sleeve 15 and the guide surface 13d of the joint body 13 is sealed. By sealing these portions, the sealing performance between the pipe 12 and the joint body 13 is ensured.
- (DO-2t) indicates the inner diameter obtained by subtracting the thickness 2t of the portion of the joint body 13 from which the inner diameter DO of the joint hole 13b of the joint body 13 bites into the sleeve 12 and into the pipe 12, and into the pipe 12.
- ⁇ Dp— (DO—2t) ⁇ indicates the amount of biting into the pipe 12 of the tip 15a of the sleeve 15.
- the biting coefficient ⁇ Dp— (DO ⁇ 2t) ⁇ ZDp can be used as a parameter representing the biting ratio of the sleeve 15 to the pipe 12.
- X in FIG. 5 represents a change in the sealing performance of the pipe joint 1 with respect to a change in the biting coefficient.
- the vertical axis represents the leak amount Q (ccZsec) from the joint force of the pipe 12.
- the amount of leakage Q from the joint is measured by a helium leak inspection machine when helium is filled in pipe 12 and fitting 1 and the pressure is set to 4.2 MPa.
- the bite coefficient is fixed at an outer diameter Dp of ⁇ 9.52 mm, an inclination angle ⁇ is fixed at 20 °, an inclination angle j8 force is fixed at 15 °, and a thickness t is 0.1 to 0. It is changed by changing within the range of 6mm.
- the leakage amount Q decreases as the biting coefficient increases, that is, as the biting ratio of the sleeve 15 increases. Then, the leak amount Q when the coefficient narrowing eating becomes 0.03 or eliminated substantially, the measurement limit 10_ 6 following values of helium leak testing machine.
- Y in FIG. 5 represents the change in the tightening torque of the nut 14 with respect to the change in the biting coefficient.
- the measured force that maximizes the tightening torque T when the nut 14 is tightened so that the leakage amount Q is minimized is also calculated.
- the bite coefficient is fixed at an outer diameter Dp of ⁇ 9.52 mm, an inclination angle a is fixed at 20 °, an inclination angle j8 is fixed at 15 °, and a thickness t is 0.1 to 0.6 mm. It is changed by changing within the range of.
- the torque coefficient increases as the biting coefficient increases, that is, as the biting ratio of the sleeve 15 increases.
- the torque coefficient is 1.8 X 10 5 or more
- the torque coefficient is likely to damage the male thread 13c of the joint body 13 or the female thread 14a of the nut 14. Enter the screw breakage zone Z.
- Fig. 5 shows changes in the torque coefficient when the outer diameter Dp of the pipe 12 changes and the biting coefficient changes.
- a certain position P4 and a position P5 where the outer diameter Dp is ⁇ 19.05 mm are located almost on the Y line. This can prove that even if the outer diameter Dp changes, there is almost no change in the relationship between the biting coefficient and the torque coefficient.
- the biting coefficient when the biting coefficient is set to 0.02 or more, the leakage amount Q from the joint portion of the pipe 12 can be almost eliminated, and when the biting coefficient is set to 0.1 or less, the joint body 13 or It can suppress that the thread part of nut 14 is damaged.
- the relationship between the biting coefficient and the leak rate Q does not change with the value of the inclination angle ⁇ , but the relationship between the biting coefficient and the torque coefficient changes with the inclination angle OC. Therefore, it is preferable that the biting coefficient is set to be 0.04 or more and 0.06 or less in consideration of the margin of the tightening torque.
- the sleeve 15 that bites into the outer peripheral surface 12b of the pipe 12 is provided integrally with the nut 14 before the nut 14 is screwed into the joint body 13! / RU For this reason, it is possible to prevent the sleeve 15 from being lost until the pipe 12 is joined, as compared with the case where the sleeve 15 is configured separately from the nut 14. This eliminates the need to store the sleeve 15 as a spare part. Further, since the sleeve 15 is provided integrally with the nut 14, there is no work for assembling the sleeve 15 when the pipe 12 is joined to the joint body 13, and workability when the pipe 12 is connected is reduced. improves.
- the sleeve 15 is configured so that the sleeve 15 is easily cut because the nut 14 force is also cut when the nut 14 is screwed into the joint body 13 and bites into the outer peripheral surface 12b of the pipe 12.
- the pipe 12 can be joined to the joint hole 13b of the joint body 13 while ensuring the sealing performance of the joint.
- the sleeve 15 is formed on the inner peripheral surface of the nut 14, and the tip of the sleeve 15 is located in the nut 14. Therefore, it is possible to prevent the sleeve 15 from exposing the force of the nut 14 to the outside, and it is possible to prevent the sleeve 15 from being damaged when the nut 14 is handled. As a result, the distal end portion 15a or the outer peripheral surface 15c of the sleeve 15 is damaged, and the sealing performance between the distal end portion 15a of the sleeve 15 and the outer peripheral surface 12b of the pipe 12 or the guide between the outer peripheral surface 15c of the sleeve 15 and the joint body 13 is achieved. It can be avoided that the sealing performance between the surface 13d is impaired.
- the sleeve 15 is integrally molded with the nut 14. For this reason, the number of parts of the pipe joint 1 can be reduced, and the parts management of the pipe joint 1 and the assembly work of the pipe joint 1 are facilitated.
- the joint body 13 is formed with a male thread portion 13c
- the nut 14 is formed with a female thread portion 14a.
- the nut 14 is fastened to the joint body 13 by the female screw portion 14a being screwed into the male screw portion 13c. Therefore, the sleeve 15 can be securely bited into the outer peripheral surface of the pipe 12 by the screwing operation of the nut 14.
- a cut surface 1 formed by cutting the base portion 15e of the sleeve 15 1 4d and 15f are formed along the thickness direction of the base portion 15e of the sleeve 15, that is, the screwing direction of the nut 14. For this reason, the direction of the shearing force acting on the base portion 15e of the sleeve 15 and the direction in which the cut surfaces 14d and 15f are formed can be made substantially the same direction, and the base portion 15e can be easily cut by screwing the nut 14. Can do.
- the cut surface 14d of the nut 14 is separated from the joint body 13 until the nut 14 and the sleeve 15 are separated and until the sleeve 15 bites into the pipe 12 as well.
- the cut surface 15f of the sleeve 15 is configured to be separated from the nut 14. Therefore, avoid that the cut surfaces 14d and 15f come into contact with the joint body 13 or the nut 14 and the nut 14 is not sufficiently screwed into the joint body 13 and the sleeve 15 does not sufficiently bite into the pipe 12. Can do.
- the sleeve 15 is formed of a material having a hardness equal to or higher than the hardness of the material forming the pipe 12. For this reason, the sleeve 15 can easily bite into the pipe 12, and the sealing performance at the site where the sleeve 15 bites into the pipe 12 can be improved.
- the tip 15g of the sleeve 15 that bites into the pipe 12 has a sharp edge shape. For this reason, it is possible to improve the sealing performance at the site where the sleeve 15 bites into the pipe 12 and the sleeve 15 bites into the pipe 12.
- the tip 15 a of the sleeve 15 bites into the pipe 12, and the tip 15 a is located at the tip of the nut 14. For this reason, the leading end 15a can be easily deformed by screwing the nut 14.
- the sleeve 15 bites into the pipe 12 when the guide surface 13 d presses the outer peripheral surface 15 c of the sleeve 15. For this reason, it can be configured such that the tip 15a of the sleeve 15 is gradually deformed as the nut 14 is screwed. As a result, it is possible to securely fasten the nut 14 while suppressing the screwing torque of the nut 14 from becoming excessive, and to securely bite the sleeve 15 into the pipe 12. (10) In the first embodiment, the inclination angle ⁇ of the outer peripheral surface 15c of the sleeve 15 is set smaller than the inclination angle ⁇ of the guide surface 13d of the joint body 13. For this reason, the front end portion 15a of the sleeve 15 is easily deformed by being directed toward the pipe 12. As a result, the sleeve 15 can be reliably bitten by the pipe 12.
- the inclination angle ⁇ of the outer peripheral surface 15c of the sleeve 15 is set to be larger than half the inclination angle ⁇ of the guide surface 13d of the joint body 13. For this reason, it is possible to avoid that the pressing force from the guide surface 13d is not efficiently applied to the outer peripheral surface 15c of the sleeve 15 because the inclination angle j8 becomes excessively small.
- the shapes of the pipe joint 1 and the pipe 12 are set so that the biting coefficient is not less than 0.02 and not more than 0.1.
- the biting coefficient is set to 0.02 or more, the biting ratio of the sleeve 15 can be increased when the pipe 12 is joined, and the leakage amount Q from the joint of the pipe 12 can be almost eliminated.
- the biting coefficient is set to 0.1 or less, the biting ratio of the sleeve 15 can be prevented from becoming unnecessarily large, and damage to the threaded portion of the joint body 13 or the nut 14 can be suppressed. As a result, it is possible to ensure the sealing performance at the joint portion of the pipe 12 while suppressing damage to the threaded portion of the joint body 13 or the nut 14.
- the structure in which the pipe is joined to the joint main body by the sleeve biting into the outer peripheral surface of the pipe by screwing the nut into the joint main body is the same as in the first embodiment.
- the sleeve 25 and the nut 24 are not provided integrally, and the sleeve 25 and the joint body 23 are provided integrally.
- the sleeve 25 is provided integrally with the joint body 23 before the pipe 12 is joined, and is separated from the joint body 23 by being screwed into the joint body 23 of the nut 24 as a fastening member. It is configured.
- FIGS. 6 (a) to 6 (c) are cross-sectional views showing the operation around the sleeve 25 of the pipe joint 2 when the pipe 12 is joined to the joint body 23.
- FIG. 6 (a) the joining surface 25h positioned at the proximal end of the sleeve 25 is formed along the screwing direction of the nut 24, and the joining surface 23h located at the proximal end of the joint body 23 is formed by adhesion. It is joined to.
- the sleeve 25 may be joined to the joint body 23 by fitting the joint surface 25 h of the sleeve 25 into the joint surface 23 h of the joint body 23 by press fitting or the like. By this joining, the sleeve 25 is assembled integrally with the joint body 23.
- the contact portion 24 c of the nut 24 comes into contact with the base end surface 25 d of the sleeve 25, and the pressing force increases as the nut 24 is screwed.
- This increases the shearing force applied in the screwing direction of the nut 24 at the joint surface 25h of the sleeve 25 and the joint surface 23h of the joint body 23, and the joint surface 25h of the sleeve 25 and the joint surface 23h of the joint body 23 Disconnected. Therefore, the joint surfaces 25h and 23h constitute a cut surface.
- the joining surfaces 25h and 23h are formed along substantially the same direction as the direction in which the shearing force acts, the joining surfaces 25h and 23h are easily cut by screwing the nut 24. By this cutting, as shown in FIG. 6 (b), the joint body 23 and the sleeve 25 are separated.
- the guide surface 23d of the joint body 23 comes into contact with a part of the outer peripheral surface 25c of the sleeve 25, and the contact portion 24c of the nut 24 comes into contact with the proximal end surface 25d of the sleeve 25. Abut.
- the base end surface 25d of the sleeve 25 receives a pressing force from the contact portion 24c of the nut 24, and the outer peripheral surface 25c of the sleeve 25 is guided by the guide surface 23d of the joint body 23.
- the tip 25 a of the sleeve 25 bites into the outer peripheral surface 12 b of the pipe 12.
- the second embodiment has the following advantages.
- the sleeve 25 of the second embodiment is provided integrally with the joint body 23 before the nut 24 is screwed into the joint body 23. Therefore, similarly to the first embodiment, it is possible to prevent the sleeve 25 from being lost until the pipe 12 is joined, and it is not necessary to store the sleeve 25 as a spare part. Further, the work of assembling the sleeve 25 when the pipe 12 is joined to the joint body 23 is eliminated, and the workability when the pipe 12 is connected is improved.
- the sleeve 25 is cut from the joint body 23 by screwing the nut 24 into the joint body 23 and bites into the outer peripheral surface 12b of the pipe 12, it is possible to easily cut the sleeve 25 and The pipe 12 can be joined to the joint hole 23b of the joint body 23 while ensuring the sealing property.
- the joint body 23 is formed with a male thread portion 23c
- the nut 24 is formed with a female thread portion 24a.
- the nut 24 is fastened to the joint body 23 by the female screw portion 24a being screwed into the male screw portion 23c. Therefore, the sleeve 25 can be securely bited into the outer peripheral surface of the pipe 12 by the screwing operation of the nut 24.
- the sleeve 25 of the second embodiment is joined to the joint body 23 by a method such as adhesion or fitting, and is integrally assembled with the joint body 23. Therefore, even when it is difficult to integrally process the sleeve 25 and the joint body 23, the sleeve 25 and the joint body 23 can be integrated. Therefore, the sleeve 25 and the joint body 23 can be integrated together while taking into account the caloric properties of the sleeve 25 and the joint body 23.
- the joint surface 23 h of the joint body 23 and the joint surface 25 h of the sleeve 25 are formed along the screwing direction of the nut 24.
- the direction of the shear force applied by screwing the nut 24 and the direction of the joint surfaces 25h, 23h can be made substantially the same direction, and the joint surfaces 25h, 23h can be easily cut by screwing the nut 24. Can do.
- the joint surface 23h of the joint body 23 is separated from the nut 24 after the joint body 23 and the sleeve 25 are separated until the sleeve 25 bites into the pipe 12.
- the joint surface 25h of the sleeve 25 is configured to be spaced apart from the joint body 23. As a result, the joint surfaces 25h, 23h come into contact with the joint body 23 or the nut 24, and the nut 24 is not sufficiently screwed into the joint body 23, so that the sleeve 25 is not sufficiently eaten into the pipe 12. It can be avoided.
- the pipe joint according to the present invention will be described with reference to FIG.
- the pipe is joined to the joint body by screwing the nut into the joint body.
- the pipe is joined to the joint body without using a screw structure between the joint body and the nut.
- the sleeve is provided integrally with the fastening member. Then, when the fastening member is slid in the axial direction of the pipe, the sleeve is cut from the fastening member, and the separated sleeve bites into the outer peripheral surface of the pipe.
- the overlapping description is omitted or simplified.
- FIGS. 7A to 7C are cross-sectional views showing the operation of the pipe joint 5 when the pipe 12 is joined to the joint body 53.
- FIG. FIG. 7 (a) shows a state before the pipe 12 is connected by the pipe joint 5.
- the pipe joint 5 includes a joint body 53 into which the pipe 12 is inserted, a fastening member 54 fastened to the joint body 53, and a sleeve 55 that bites into the outer peripheral surface of the pipe 12. I have.
- the sleeve 55 is integrally formed with the fastening member 54, and the sleeve 55 and the fastening member 54 are connected through the base portion 55e.
- a plurality of operating levers 56 are rotatably supported on the outer peripheral surface of the joint body 53.
- the rotating shaft 56a of each operating lever 56 is formed so as to extend in a direction substantially perpendicular to the axis of the joint body 53.
- a locking lever 57 is rotatably supported between the operation levers 56.
- the rotating shaft 57a of the locking lever 57 is disposed so as to extend in parallel with the rotating shaft 56a of the operating lever 56.
- the locking claw 57b formed at the tip of the locking lever 57 is configured to be engageable with a protrusion 54f formed on the outer peripheral surface of the fastening member 54.
- a circular sliding surface 53i is formed on the outer peripheral surface of the proximal end portion of the hand main body 53.
- a sliding surface 54i having a circular shape is formed on the inner peripheral surface of the distal end portion of the fastening member 54.
- the proximal end surface 55 d of the sleeve 55 receives a pressing force from the contact portion 54 c of the fastening member 54, and the outer peripheral surface 55 c of the sleeve 55 is guided by the guide surface 53 d of the joint body 53.
- the tip 55a of the sleeve 55 bites into the outer peripheral surface 12b of the pipe 12 as shown in FIG.
- the third embodiment has the following advantages. (17)
- the fastening member 54 is fastened to the joint body 53 by operating the operating lever 56. Then, the sleeve 55 provided integrally with the fastening member 54 is cut from the fastening member 54 and bites into the outer periphery of the pipe 12, and the pipe 12 is joined to the joint body 53. Therefore, even if a screw structure is not used between the joint body 53 and the fastening member 54, the same advantages as the effects (1), (2), and (4) to (12) of the first embodiment are obtained. Obtainable.
- the pipe joint according to the fourth embodiment is configured such that the fastening member is slid in the axial direction of the pipe when the pipes are joined.
- the redundant description thereof will be omitted or simplified.
- FIGS. 8A to 8C are cross-sectional views showing the operation of the pipe joint 6 when the pipe 12 is joined to the joint body 63.
- FIG. FIG. 8 (a) shows a state before the pipe 12 is connected by the pipe joint 6.
- the pipe joint 6 includes a joint body 63 into which the pipe 12 is inserted, a fastening member 64 fastened to the joint body 63, and a sleeve 65 that bites into the outer peripheral surface of the pipe 12. I have.
- the sleeve 65 is integrally formed with the fastening member 64, and the sleeve 65 and the fastening member 64 are connected through the base portion 65e.
- each flange portion 63 ⁇ 4 is formed with a coupling hole 63k extending along the fastening direction of the fastening member 64.
- a flange portion 64j is formed at a position facing each flange portion 63j of the joint body 63.
- Each flange portion 64j is formed with a coupling hole 64k coaxially with the coupling hole 63k.
- a sliding surface 63m having a circular shape is formed on the outer peripheral surface of the base end portion of the joint body 63.
- a sliding surface 64m having a circular shape is formed on the inner peripheral surface of the distal end portion of the fastening member 64.
- the sliding surface 63m is engaged with the sliding surface 64m.
- the fastening member 64 is configured to be movable only in the axial direction with respect to the joint body 63.
- the fastening member 64 When the nut 67 is further tightened, the fastening member 64 further moves toward the joint body 63, so that the guide surface 63d of the joint body 63 comes into contact with a part of the outer peripheral surface 65c of the sleeve 65, and The contact portion 64c of the fastening member 64 contacts the proximal end surface 65d of the sleeve 65.
- the base end surface 65d of the sleeve 65 receives a pressing force from the contact portion 64c of the fastening member 64, and the outer peripheral surface 65c of the sleeve 65 is guided by the guide surface 63d of the joint body 63.
- the tip 65 a of the sleeve 65 bites into the outer peripheral surface 12 b of the pipe 12.
- the pipe joint 6 is configured so that the distal end portion 65a of the sleeve 65 bites into the outer peripheral surface 12b of the pipe 12, so that the sealing performance between the pipe 12 and the joint body 63 is ensured. Is joined to the joint body 63.
- the fourth embodiment has the following advantages.
- the fastening member 64 is fastened to the joint body 63 by fastening the nut 67 to the bolt 66. Then, the sleeve 65 provided integrally with the fastening member 64 is cut from the fastening member 64 and bites into the outer periphery of the pipe 12, and the pipe 12 is joined to the joint body 63. For this reason, even if a screw structure is not used between the joint body 63 and the fastening member 64, the same advantages as the advantages (1), (2), and (4) to (12) of the first embodiment Can be obtained.
- the sleeve 15 is integrally processed with the nut 14. .
- the present invention is not limited to this, and the sleeve 15 may be joined to the nut 14 by a method such as adhesion or fitting.
- the sleeve 25 is integrally provided with the joint body 23 by being joined to the joint body 23 by a method such as adhesion or fitting.
- the sleeve 25 may be integrally formed with the nut 24 without being limited to this.
- the cut surfaces 14d, 15f and the joining surfaces 23h, 25h are formed along the screwing direction of the nuts 14, 24. If the sleeves 15 and 25 are easily cut and separable, the cut surfaces 14d and 15f and the joint surfaces 23h and 25h are along directions other than the screwing directions of the nuts 14 and 24. It may be formed.
- the cut surfaces 14d and 15f and the joint surfaces 23h and 25h are connected to the joint body until the sleeves 15 and 25 are separated and the force sleeves 15 and 25 bite into the pipe 12. 13 and 23 or nuts 14 and 24. If the sleeves 15 and 25 can sufficiently penetrate the pipe 12, the cut surfaces 14d and 15f and the joint surfaces 23h and 25h are not in contact with the joint bodies 13 and 23 or the nuts 14 and 24. Also good.
- the tips 15a, 25a, 55a, 65a of the sleeves 15, 25, 55, 65 are inserted into the outer peripheral surface 12b of the self-pipe.
- the present invention is not limited to this, and the sleeves 15, 25, 55, 65 may bite into the outer peripheral surface 12b of the M standing force self-pipe 12 other than the tip ends 15a, 25a, 55a, 65a.
- the tips of the tip portions 15a, 25a, 55a, 65a that bite into the pipe 12 have a sharp edge shape.
- the tip of the tip 15a, 25a, 55a, 65a has a shape other than a sharp edge as long as the sealing performance at the portion of the sleeve 15, 25, 55, 65 that bites into the pipe 12 can be secured. You may have.
- the inclination angle j8 of the outer peripheral surfaces 15c, 25c, 55c, 65c is smaller than the inclination angle a of the guide surfaces 13d, 23d, 53d, 63d and half of the inclination angle a. It is set larger than the angle.
- the present invention is not limited to this, and the inclination angle O and the inclination angle ⁇ may be set to a relationship other than the above in consideration of the friction coefficient between the outer peripheral surface and the guide surface.
- the sleeves 15, 25, 55, 65 are formed of a material having a hardness equal to or higher than the hardness of the material forming the pipe 12. Not limited to this, but bites into the self-tube 12 of the sleeve 15, 25, 55, 65 If possible, the sleeves 15, 25, 55, 65 may be formed of a material having a lower hardness than that of the material forming the pipe 12.
- the pipe 11 inserted into the socket portion of the joint body is fixed to the joint body by brazing, and the pipe 12 inserted into the joint hole is joined to the joint body by fastening a sleeve or a fastening member.
- the present invention is not limited to this, and the pipes located at both the distal end portion and the proximal end portion of the joint body are joined to the joint body by fastening the sleeve or the fastening member.
- FIG. 9 is a partial cross-sectional view showing a pipe joint 7 in which the configuration of the first embodiment is used for both the distal end portion and the proximal end portion of the joint body.
- Joint holes 73a and 73b are provided at the distal end and the base end of the joint body 73, and pipes 11 and 12 are inserted into the joint holes 73a and 73b, respectively.
- the sleeve 75 provided integrally with the nut 74 is cut from the nut 74 by screwing the nut 74 into the joint body 73 and bites into the outer circumferences of the pipes 11 and 12. Then, the pipes 11 and 12 are joined to the joint body 73.
- FIG. 10 is a partial cross-sectional view showing a pipe joint 8 configured such that pipes having different outer diameters can be connected to each other by using the configuration of the first embodiment at the distal end and the base end of the pipe joint. It is.
- a pipe 81 is inserted into the joint hole 83a formed at the tip of the joint body 83.
- the inner diameter of the joint hole 83b formed in the base end portion of the joint body 83 is set smaller than the inner diameter of the joint hole 83a.
- a pipe 82 having an outer diameter smaller than the outer diameter of the pipe 81 is inserted into the joint hole 83b.
- the sleeves 85a and 85b provided integrally with the nuts 84a and 84b, respectively, are cut from the nuts 84a and 84b by screwing the nuts 84a and 84b into the joint body 83 and bite into the outer peripheral surfaces of the pipes 81 and 82. .
- the pipes 81 and 82 are joined to the joint body 83.
- the pipe joint 8 is It can be suitably used.
- the pipe joint is configured to connect the two pipes 11, 12. Without being limited thereto, the pipe joint may be configured to connect three or more pipes.
- FIG. 11 is a cross-sectional view showing a pipe joint 9 that connects four pipes using the configuration of the first embodiment.
- the pipe joint 9 is configured to branch the fluid flowing from the first port 91 to the second to fourth ports 92, 93, 94. Pipings 95, 96, 97, and 98 are inserted into the joining holes 91a, 92a, 93a, and 94a formed in the respective ports.
- the self-pipe 95, 96, 97, 98 force is joined to each port 91, 92, 93, 94 by the nut 14 and the sleeve 15 of the pipe handle 1 of the first embodiment.
- the pipe joint 9 can be suitably used at a location where the refrigerant branches or merges.
- all pipes may be connected by the configuration of the first embodiment as long as at least one pipe is connected by the configuration of the first embodiment.
- FIG. 12 is a schematic diagram showing a connection state between the branch pipe 99 and the pipe 100.
- the branch pipe 99 is configured such that the flow path is branched into a plurality of branches, and the ends of the branch pipe 99 are connected to the pipe 100 by pipe joints 7 and 8, respectively. Even with this configuration, the pipe 100 can be branched or merged while securing the sealing property at the joint of the pipe 100.
- the branch pipe 99 and the pipe joints 7 and 8 can be preferably used.
- the type of fluid flowing in the piping is not particularly limited.
- a pipe through which a supercritical refrigerant used in a supercritical state flows may be connected by the pipe joint of the first to fourth embodiments.
- the sealing performance at the joint between the pipe joint and the pipe is high. Because it is secured It is possible to suitably suppress the leakage of the refrigerant.
- a pipe through which the carbon dioxide refrigerant flows may be connected by the pipe joint of the first to fourth embodiments.
- the piping circuit using the pipe joint can be configured in consideration of the global environment.
- the sealing performance at the joint between the pipe joint and the piping is ensured. Therefore, it is possible to suitably suppress the leakage of the refrigerant at the joint.
- piping through which the hydrocarbon refrigerant flows may be connected by the pipe joints of the first to fourth embodiments.
- the fluid flowing in the connected pipe is a hydrocarbon refrigerant such as propane or isobutane
- the pipe circuit using the pipe joint can be configured in consideration of the global environment.
- the sealing performance at the joint between the pipe joint and the pipe is ensured, it is possible to suitably suppress leakage of hydrocarbon refrigerant having strong flammability from the joint.
- the pipe joint is used to connect the pipe 11 and the pipe 12.
- the present invention is not limited to this, and the configuration of these pipe joints may be used, for example, in a connection portion of a shut-off valve that is disposed in a refrigerant pipe of an air conditioner.
- FIG. 13 is a cross-sectional view showing a shut-off valve 31 using the configuration of the pipe joint 1 of the first embodiment.
- the shut-off valve 31 includes a housing 32 connected in a substantially cross shape so that the end portions of the first to fourth cylindrical portions 32a, 32b, 32c, 32d communicate with each other.
- a first port 33 and a second port 34 to which pipes are joined are formed in the first cylindrical portion 32a and the second cylindrical portion 32b, respectively.
- a service port 35 is formed in the third cylindrical portion 32c.
- the closing valve 31 is configured to be able to evacuate the pipe, charge the refrigerant, and the like by the operation of the valve element 37 of the valve core 36.
- a substantially cylindrical valve body 38 is disposed in the fourth cylindrical portion 32d, and the operation of the valve body 38 allows the first port 33 and the second port 34 to communicate with each other or to be blocked.
- the configuration of the pipe joint 1 of the first embodiment is applied to the first port 33. That is, the structure of the joint body 13 of the pipe joint 1 is used for the housing 32 of the closing valve 31, and the pipe 12 inserted into the first port 33 is joined by the nut 14 and the sleeve 15. Thereby, the shut-off valve 31 having the advantages of the pipe joint described above is obtained.
- the pipe joint connects the pipe 11 and the pipe 12, but the component force of these pipe joints.
- the indoor unit 42 and the outdoor of the air conditioner 41 as shown in Fig. 14 The present invention may be applied to the connecting portions 45 and 46 of the refrigerant pipe 44 that communicates with the unit 43.
- the refrigerant pipe 44 is joined to the connection portion 45 where the indoor unit 42 and the refrigerant pipe 44 are connected by using the pipe joint of the first to fourth embodiments.
- the closing valve 31 may be used to join the refrigerant pipe 44 to the connection portion 46 where the outdoor unit 43 and the refrigerant pipe 44 are connected.
- the pipe joints 7 and 8 may be used in the middle of the refrigerant pipe 44 to connect the pipes.
- the pipe joint 9 may be used in the middle of the refrigerant pipe 44. May be connected in the form of branching or merging.
- the configuration of the pipe joint according to the first to fourth embodiments may be applied to a refrigerant pipe connection portion in other refrigeration apparatuses that include only the air conditioner 41. Thereby, a refrigeration apparatus having the advantages of the pipe joint described above can be obtained.
- FIGS. 15 (a) and 15 (b) are schematic views showing the connection state of the piping of the heat pump type hot water heater.
- FIG. 15 (a) shows a schematic diagram of a heat pump type hot water heater 111 composed of one tank.
- the heat pump type hot water heater 111 includes a heat pump unit 121 that pumps heat from outside air and a hot water storage unit 131 that supplies hot water using the heat pumped up by the heat pump unit 121.
- the heat pump unit 121 also serves as a refrigeration cycle apparatus having an expansion valve 122, an air heat exchange 123, a compressor 124, and a hydrothermal exchange 125.
- Refrigerant is circulated in the refrigerant pipe 126 connecting each device.
- the hot water storage unit 131 is configured as follows. That is, the water supplied to the tank 133 via the water supply pipe 132 is circulated between the tank 133 and the hydrothermal exchanger 125 by the pump 134. The hot water heat-exchanged by the hydrothermal exchange 125 is supplied from the tank 133 through the water supply pipe 135.
- FIG. 15 (b) shows a schematic diagram of a heat pump type hot water heater 112 composed of two tanks.
- the heat pump type hot water heater 112 has the same configuration as the heat pump type hot water heater 111! /.
- the first tank 142 and the second tank 143 corresponding to the tank of the hot water storage unit 141 Forces are connected in series with each other.
- the heat pump type hot water heater 112 is provided with a re-cooking function configured as follows. That is, the hot water stored in the first tank 142 and the second tank 143 is circulated by the pump 145 between the heating heat exchangers 144. Then, the hot water sent from the bathtub 146 through the water supply pipe 147 by the pump 148 is heated by exchanging heat with the follow-up heat exchanger l44 and returned to the bathtub 146 through the water supply pipe 149.
- the pipe joints of the first to fourth embodiments are used for the connection part 127 provided in the refrigerant pipe 126 and the connection part 136 provided in the water supply pipes 132 and 135. Can be.
- the pipe joints of the first to fourth embodiments can be used for the connection portion 150 provided in the water supply pipes 147 and 149 in addition to this.
- the connecting portions 127, 136, and 150 may be provided at other positions depending on the arrangement of devices and units constituting the heat pump type hot water heater.
- the pipe joint in addition to the connection part of the refrigerant pipe, can be applied to the connection part of the water supply pipe through which water flows in the pipe. Moreover, the said pipe joint can be applied also to the connection part of the water supply piping comprised with a resin.
- the piping connection method described in the first to fourth embodiments may be used, and piping work may be performed at the construction site of the air conditioner 41 or the heat pump water heater 111, 112.
- the piping can be connected by the fastening operation of the fastening member to the joint body, etc., so it is safe and easy without using brazing equipment or the like.
- a local piping construction method for constructing piping can be provided.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006295825A AU2006295825A1 (en) | 2005-09-30 | 2006-09-29 | Pipe joint, refrigeration device, heat pump hot water supply device, closing valve, water supply piping, method of connecting piping, and in-the-field piping method |
EP06798448A EP1930641A1 (en) | 2005-09-30 | 2006-09-29 | Pipe joint, refrigeration device, heat pump hot water supply device, closing valve, water supply piping, method of connecting piping, and in-the-field piping method |
US12/088,504 US7971909B2 (en) | 2005-09-30 | 2006-09-29 | Pipe joint, refrigeration device, heat pump hot water supply device, closing valve, water supply piping, method of connecting piping, and in-the field piping method |
CN2006800342568A CN101268299B (zh) | 2005-09-30 | 2006-09-29 | 管接头、冷冻装置、热泵式热水供应器、封闭阀、供水配管、配管的连接方法和现场配管施工方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005289209 | 2005-09-30 | ||
JP2005-289209 | 2005-09-30 | ||
JP2006-023471 | 2006-01-31 | ||
JP2006023471A JP3940850B2 (ja) | 2005-09-30 | 2006-01-31 | 管継手、冷凍装置、ヒートポンプ式給湯機、閉鎖弁、給水配管、配管の接続方法、及び現地配管施工方法 |
Publications (1)
Publication Number | Publication Date |
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WO2007037367A1 true WO2007037367A1 (ja) | 2007-04-05 |
Family
ID=37899788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/319456 WO2007037367A1 (ja) | 2005-09-30 | 2006-09-29 | 管継手、冷凍装置、ヒートポンプ式給湯機、閉鎖弁、給水配管、配管の接続方法、及び現地配管施工方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7971909B2 (ja) |
EP (1) | EP1930641A1 (ja) |
JP (1) | JP3940850B2 (ja) |
KR (1) | KR20080024243A (ja) |
CN (1) | CN101268299B (ja) |
AU (1) | AU2006295825A1 (ja) |
TW (1) | TW200726935A (ja) |
WO (1) | WO2007037367A1 (ja) |
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CN101617159B (zh) * | 2007-03-19 | 2012-09-19 | 大金工业株式会社 | 咬入式管接头、制冷装置和水加热装置 |
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JP5023721B2 (ja) * | 2006-01-31 | 2012-09-12 | ダイキン工業株式会社 | 食い込み式管接続構造 |
JP2009019652A (ja) * | 2007-07-10 | 2009-01-29 | Shigeo Kawasaki | 管継手 |
WO2009025796A2 (en) * | 2007-08-21 | 2009-02-26 | King Lloyd Herbert Jr | Leak proof pipe connections and leak proofing pipe connections |
JP5266956B2 (ja) | 2007-09-11 | 2013-08-21 | ダイキン工業株式会社 | 両用管継手、この両用管継手用の専用工具、冷凍装置、分離型空気調和機 |
KR100950219B1 (ko) * | 2008-05-29 | 2010-03-29 | 주식회사 중앙씨엠아이 | 콤팩트한 연결구조를 제공하는 파이프 어셈블리 |
JP4557081B2 (ja) * | 2009-01-21 | 2010-10-06 | ダイキン工業株式会社 | 食い込み式管接続構造、弁、食い込み式管継手及び冷凍装置 |
JP6022592B2 (ja) * | 2011-11-04 | 2016-11-09 | サン−ゴバン パフォーマンス プラスティックス コーポレイション | 着脱可能なサンプリングバルブをもつ配管継手のためのシステム、方法および装置 |
FR3003330B1 (fr) * | 2013-03-18 | 2015-07-17 | Arkema France | Dispositif de raccord de tube plongeur pour conteneur de conditionnement d'un produit, notamment d'un produit chimique |
WO2015187958A1 (en) | 2014-06-04 | 2015-12-10 | Parker-Hannifin Corporation | Compression fitting with torque nut |
CN107923558B (zh) * | 2015-08-28 | 2019-08-27 | 株式会社富士金 | 管接头、流体控制器、流体控制装置、半导体制造装置以及管接头的制造方法 |
KR20180112824A (ko) | 2016-02-09 | 2018-10-12 | 스와겔로크 컴패니 | 도관 피팅용 페룰 |
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- 2006-01-31 JP JP2006023471A patent/JP3940850B2/ja not_active Expired - Fee Related
- 2006-09-29 KR KR1020087005126A patent/KR20080024243A/ko not_active Application Discontinuation
- 2006-09-29 US US12/088,504 patent/US7971909B2/en not_active Expired - Fee Related
- 2006-09-29 CN CN2006800342568A patent/CN101268299B/zh not_active Expired - Fee Related
- 2006-09-29 TW TW095136482A patent/TW200726935A/zh unknown
- 2006-09-29 EP EP06798448A patent/EP1930641A1/en not_active Withdrawn
- 2006-09-29 WO PCT/JP2006/319456 patent/WO2007037367A1/ja active Application Filing
- 2006-09-29 AU AU2006295825A patent/AU2006295825A1/en not_active Abandoned
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CN101617159B (zh) * | 2007-03-19 | 2012-09-19 | 大金工业株式会社 | 咬入式管接头、制冷装置和水加热装置 |
Also Published As
Publication number | Publication date |
---|---|
CN101268299A (zh) | 2008-09-17 |
KR20080024243A (ko) | 2008-03-17 |
EP1930641A1 (en) | 2008-06-11 |
AU2006295825A1 (en) | 2007-04-05 |
US20100148502A1 (en) | 2010-06-17 |
JP3940850B2 (ja) | 2007-07-04 |
JP2007120741A (ja) | 2007-05-17 |
US7971909B2 (en) | 2011-07-05 |
CN101268299B (zh) | 2010-08-11 |
TW200726935A (en) | 2007-07-16 |
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