JP5767979B2 - Fluid flow member - Google Patents

Description

  The present invention relates to a fluid circulation member.

  2. Description of the Related Art Conventionally, there is known a fluid flow member that has a tubular portion, has a large-diameter portion provided on the distal end side in the axial direction of the tubular portion, and an annular seal member is disposed on the proximal side in the axial direction from the large-diameter portion ing. Such a fluid circulation member is mainly used for circulating hot water in a water heater. The large-diameter portion has an annular end surface formed by plastically deforming the distal end portion of the tubular member and bending it radially inward. In the structure of Patent Document 1, the annular end face has the radially inner end edge in the same axial position as the radially outer edge.

  When attaching a seal member to such a male tubular portion, after hooking a part of the annular seal member to the large diameter portion, the other part of the seal member is connected to the radially outer edge of the annular end surface. Mounted by rolling or sliding on it.

JP 2008-256028 A

  However, if there is a sharp part such as a protrusion called a burr on the radially inner edge of the annular end face, when the seal member is rolled on the radially outer edge of the annular end face, the seal member hits the sharp part. And may be damaged.

  Accordingly, an object of the present invention is to provide a fluid circulation member that does not damage the seal member when the seal member is mounted on the tubular portion.

The present invention includes a tubular portion, a pair of large-diameter portion is provided through the small diameter portion in the axial direction distal end side and the proximal side of the tubular portion, an annular sealing member is disposed in the small diameter portion, the The proximal-side large-diameter portion is locked to a fixing member when connected to the female-side tubular portion, and the distal-end-side large-diameter portion is disposed in the small-diameter portion when separated from the female-side tubular portion. of a fluid flow member that acts as a retaining seal member, the distal-side large-diameter portion has an annular end face formed by bending the axial tip portion of the tubular portion radially inward by plastically deforming the The annular end surface is characterized in that the radially inner end edge is located closer to the axial base end side than the radially outer end edge.

  According to the present invention, when the annular seal member is attached to the tubular portion, even if there is a sharp part such as a burr at the radially inner end edge of the annular end surface, the seal member is not damaged.

1 shows a basic configuration diagram of a water heater in which a fluid circulation member according to an embodiment of the present invention is used. It is a side view of the joint structure using the fluid distribution member concerning the embodiment of the present invention, and shows the state before inserting the male side member into the female side member. It is a side view of the joint structure using the fluid distribution member concerning the embodiment of the present invention, and shows the state where the member on the male side was inserted into the member on the female side. It is a side view of the joint structure using the fluid distribution member concerning the embodiment of the present invention, and shows the state where the male side member was inserted into the female side member and fixed with the fixing member. The perspective view of a fixing member is shown. The perspective view of the fluid distribution member concerning the embodiment of the present invention is shown. The side view of the fluid distribution member concerning the embodiment of the present invention is shown. The enlarged view explaining the fluid circulation member concerning embodiment of this invention is shown.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, a water heater 1 includes a hot water storage tank 2, a boiling means 3, a mixing valve 4 as a temperature adjusting means, a pipe 5 for delivering hot water to each part, and a T-shaped, for example. And a branch pipe 6. The hot water heater 1 is connected to an external water supply pipe 40 and an external hot water supply pipe 41. Some water heaters are provided with a three-way valve and an electromagnetic valve in addition to the mixing valve 4.

  The hot water storage type water heater shown in FIG. 1 stores water in the hot water storage tank 2 and uses an electric heater provided in the hot water storage tank 2 as the boiling means 3, but the boiling means is limited to the electric heater. Instead, it may be of a combustion type or a heat pump separately provided outside the hot water storage tank 2.

  As shown in FIGS. 2 to 4, the connection between the water distribution members such as the pipe 5, the mixing valve 4, and the branch pipe 6 facilitates the connection work and the separation work at the time of repair, etc. A joint structure called a quick joint that can be attached and detached is used. In this joint structure, a male-side tubular portion A and a female-side tubular portion B are provided at each of the end portions of the water flow member, and the male-side tubular portion A and the female-side tubular portion B are fitted. After being connected, they are fixed by a fixing member 30 called a quick fastener shown in FIG.

  As shown in FIGS. 6 and 7, a pair of large-diameter portions 10 and 11 is provided at the distal end portion of the male tubular portion A, and an O-ring is provided between the pair of large-diameter portions 10 and 11. A small-diameter portion 13 that accommodates an annular seal member 12 called “etc.” is provided. In addition, although the small diameter part 13 has the same diameter as the main diameter of the male side tubular part A in this embodiment, it may be smaller than at least the large diameter parts 10 and 11.

  The seal member 12 is a member for preventing hot water flowing in the flow path from leaking to the outside from the joint portion. The large-diameter portion 11 on the proximal end side of the pair of large-diameter portions 10 and 11 also functions as a portion that is locked to the fixing member 30. The large-diameter portion 10 on the distal end side of the pair of large-diameter portions 10 and 11 prevents the seal member 11 from coming off when the male-side tubular portion A and the female-side tubular portion B are separated. It has the function to do.

  The female member B is provided with a large-diameter portion 20 that is a portion locked to the fixing member 30 and an insertion portion 21 into which the distal end portion of the male tubular portion A is inserted.

  Conventionally, a male side member is formed by attaching a male side connecting member formed by cutting a pair of large diameter portions by metal or the like to a distal end portion of a tubular member by brazing or caulking or the like. It was. On the other hand, as shown in FIGS. 7 and 8, the male tubular portion A of the water flow member according to the present embodiment plastically deforms a tubular member such as a pipe to form the large diameter portions 10 and 11. Is. Therefore, the manufacturing cost can be reduced, and there is no fear of leakage of hot water from the mounting part due to brazing or the like, and the male side connecting member is not used separately as in the prior art. There is no fear of coming off.

  Note that the material of the male tubular portion A is a material that can be plastically deformed, and mainly copper, aluminum, and the like are conceivable. However, other metals and resins such as iron and stainless steel may be used as long as plastic deformation is possible.

  The large-diameter portion 11 on the proximal end side of the pair of large-diameter portions 10 and 11 is a portion that is locked to the fixing member 30 as described above, and the large-diameter portion 10 on the distal end side is the proximal end side. The axial length is shorter than that of the large diameter portion 11. Thereby, even if the depth of the insertion part 21 of the female side member B is small, it can be fitted and connected satisfactorily, and the axial direction length of the large-diameter part 10 on the tip side is short, so that when inserting The allowable angle of inclination between the male tubular portion A and the female tubular portion B can be increased, and even if the male tubular portion A is slightly inclined with respect to the female tubular portion B, the female side Since it can insert smoothly in the insertion part 21 of this tubular part B, it is excellent in assemblability.

  Next, the end structure of the male tubular section A of this embodiment will be described in more detail. The large-diameter portion 11 on the proximal end side of the pair of large-diameter portions 10 and 11 is an annular end surface formed by plastically deforming the axial distal end portion of the male tubular portion A with a punch and bending it radially inward. 14 The annular end surface 14 is a surface that intersects the axial direction. Specifically, as shown in FIGS. 7 and 8, the annular end surface 14 is formed such that the radially inner end edge 15 is positioned closer to the axial base end side than the radially outer end edge 16. That is, the annular end surface 14 has a structure in which the radially inner end edge 15 is retracted to the axial base end side. In FIG. 8, only the cross section of the distal end portion of the male tubular portion A is highlighted so that it can be clearly seen that the annular end surface 14 is inclined toward the proximal end side.

  By the way, since the male tubular portion A is obtained by cutting a long pipe material into a predetermined length, a sharp portion 17 such as a protrusion called a burr may be generated at the cut edge. The cut edge is located at the radially inner edge 17 of the annular end surface 14 when the distal end of the male tubular portion A is bent radially inward.

  Preferably, as shown in FIG. 8, the size of the radially inner end edge 17 retracted to the axial base end side with respect to the radially outer end edge 16 of the annular end surface 14 is larger than the height of the sharp protrusion 17. Is set.

  In such an end structure of the male tubular portion A, the distal end portion of the male tubular portion A is sequentially plastically processed, and finally the distal end portion is bent radially inward. At this time, the punch is pressed from the tip side with the small diameter portion 12 held by the clamp. At this time, the punch is punched so that the minimum gap between the clamp and the punch is smaller than the thickness of the large-diameter portion 10 on the tip side. Then, the radially inner end edge 15 of the large-diameter portion 10 is displaced toward the proximal end side as it is pressed against the punch. On the other hand, on the outer peripheral side of the large-diameter portion 10 (portion of the radially outer edge 16), a bent portion is formed by being bent, so that it is restored by a spring action after punching or resists during punching. As a result, the amount of displacement toward the base end becomes smaller than that of the radially inner end edge 15. For this reason, it is considered that the radially inner end edge 15 is positioned closer to the proximal end side in the axial direction than the radially outer end edge 16 of the annular end surface 14.

  When attaching the annular seal member 12 to the male tubular portion A, after hooking a part of the seal member 12 to the large-diameter portion 10, the other part of the seal member 12 is attached to the annular end surface 14. The roller member is rolled or slid on the radially outer edge 16, and the seal member 12 is moved by the radially inner edge 15 being positioned on the axial base end side with respect to the radially outer edge 16. At this time, it is possible to satisfactorily prevent the seal member 12 from hitting the sharp protrusion 17 that may exist on the radially inner edge 16.

  Therefore, according to the structure of the present embodiment, when the annular seal member 12 is attached to the male tubular portion A, a sharp portion 17 such as a protrusion called a burr on the radially inner end edge 15 of the annular end surface 14 is assumed. Even if there is, the sealing member 12 is not damaged.

DESCRIPTION OF SYMBOLS 10 Large diameter part 12 at the front end side Seal member 14 Annular end surface 16 Radial outer edge 17 Radial inner edge A Male tubular part

Claims (1)

Has a tubular portion, a pair of large-diameter portion is provided through the small diameter portion in the axial direction distal end side and the proximal side of the tubular portion, an annular sealing member is disposed in the small diameter portion, the base end side large The diameter portion is locked to the fixing member when connected to the female side tubular portion, and the distal end side large diameter portion is detached from the annular sealing member disposed in the small diameter portion when separated from the female side tubular portion. a fluid flow member that acts as a stop,
The tip-side large-diameter portion has an annular end surface formed by plastically deforming an axial tip portion of the tubular portion and bending it radially inward.
The annular end surface has a radially inner end edge located on an axially proximal end side with respect to a radially outer end edge.