JP2013221555A - Anticorrosion ring - Google Patents

Abstract

To provide an anticorrosion ring capable of preventing an annular portion from being greatly deformed or displaced unexpectedly when an anticorrosion ring is attached to an end portion of a fluid pipe.
An extending portion that extends in the tube axis direction along the outer peripheral surface of the fluid pipe, and an annular portion that extends in the tube diameter direction along the end surface of the fluid pipe and forms an annular shape that covers the end surface. The extension portion 12 is formed of an elastically deformable soft portion, and the annular portion 13 extends along the circumferential direction of the annular portion 13 and is harder than the soft portion. It has a hard part 17.
[Selection] Figure 4

Description

  The present invention provides an extending portion extending in the tube axis direction along the outer peripheral surface of the fluid pipe, and an annular portion extending in the tube diameter direction along the end surface of the fluid pipe and forming an annular shape covering the end surface And an anticorrosion ring.

  Conventionally, when a pipe (fluid pipe) is cut at a construction site, the cut surface (end face) of the pipe exposes the metal background, so that the pipe attached to the end of the pipe is used for corrosion protection of the cut face. There is an anticorrosion tool for the end (corrosion protection ring). Such a tube end anticorrosion tool is composed of an outer peripheral portion (extended portion) that covers the outer peripheral surface of the tube end portion, and a side surface portion (annular portion) that covers the pipe end surface. The cutting surface of the tube end portion is reliably sealed by covering the part anticorrosive tool with the insertion ring (see, for example, Patent Document 1). In addition, there is a structure in which a rubber-based adhesive (anticorrosion member) is disposed on an inwardly projecting piece (annular portion) of a similar tube anticorrosion ring (corrosion prevention ring) (for example, see Patent Document 2).

JP 2007-198581 (page 5, FIG. 3) Japanese Utility Model Publication No. 7-22198 (5th page, Fig. 2)

  However, in the tube end portion anticorrosion tool (corrosion protection ring) as described in Patent Documents 1 and 2, when the tube end portion anticorrosion device is attached to the tube end portion, it is inserted into the tube end portion anticorrosion device. When the diameter is reduced by covering the mouth ring, the side surface portion (annular portion) that is in close contact with the cut surface (end surface) of the tube end may be greatly deformed or displaced unexpectedly. There is a problem that a part of the cut surface is exposed.

  The present invention has been made paying attention to such problems, and when attaching the anticorrosion ring to the end of the fluid pipe, the anticorrosion ring that can prevent the annular part from being greatly deformed or displaced unexpectedly. The purpose is to provide.

In order to solve the above problems, the anticorrosion ring of the present invention is:
An extending portion extending in the tube axis direction along the outer peripheral surface of the fluid pipe, and an annular portion extending in the tube diameter direction along the end surface of the fluid pipe and forming an annular shape covering the end surface. Anti-corrosion ring,
The extending portion is formed of a soft portion that can be elastically deformed, and the annular portion has a hard portion that extends along a circumferential direction of the annular portion and is harder than the soft portion.
According to this feature, the rigid portion can be reinforced without excessively increasing the thickness of the annular portion, and the shape of the annular portion can be maintained. When the anticorrosion ring is attached to the end of the fluid pipe, the soft portion Even if the extended part formed by is elastically deformed, the part having the hard part in the annular part restricts deformation and the shape of the annular part is maintained, and the anticorrosion ring is easy to attach, The hard portion can prevent the annular portion from being greatly deformed or shifted unexpectedly.

The anticorrosion ring of the present invention is
The hard portion is arranged at least in the vicinity of the outer peripheral end of the annular portion.
According to this feature, when the anticorrosion ring is attached to the end of the fluid pipe, the extended portion is elastically deformed at least in the vicinity of the outer peripheral end of the annular portion that is a boundary with the extended portion. It is possible to prevent the deformation stress generated by the transmission from being transmitted to the annular portion, and to prevent the annular portion from being greatly deformed or shifted unexpectedly.

The anticorrosion ring of the present invention is
The hard portion is a plate-like member that extends in the circumferential direction along the end surface of the fluid pipe and forms an annular shape that covers the end surface.
According to this feature, the stress applied to the annular portion from other members such as the insertion ring is evenly distributed by the hard portion forming the plate member, and the entire annular portion can be uniformly pressed against the end surface of the fluid pipe.

The anticorrosion ring of the present invention is
The soft portion is integrally extended from the extended portion to a part of the annular portion, and the annular portion is characterized in that at least the end face side of the fluid pipe is constituted by the soft portion.
According to this feature, the extended portion and the annular portion are integrally joined from the extended portion to the annular portion, and the extended portion and the annular portion are securely coupled to each other, and the extended portion and the annular portion may be peeled off from each other. In addition, when the soft portion of the annular portion is pressed toward the end surface of the fluid pipe, the soft portion can be brought into close contact with the end surface of the fluid pipe due to its elasticity.

The anticorrosion ring of the present invention is
It further includes an anticorrosion member disposed on the end surface side of the fluid pipe in the annular portion to prevent the end surface, and an accommodation region for accommodating the anticorrosion member is formed in an arrangement portion of the anticorrosion member in the annular portion. It is characterized by that.
According to this feature, when the anticorrosion ring is attached to the end portion of the fluid pipe, the anticorrosion member can be accommodated in the accommodation region in the annular portion, and even if the anticorrosion member is deformed along the end face of the fluid pipe, The anticorrosion member is prevented from leaking in the inner diameter direction.

The anticorrosion ring of the present invention is
The extending portion is formed with a slit portion extending in the tube axis direction.
According to this feature, when another member such as an insertion ring comes into contact with the extended portion, the deformation force applied to the extended portion is alleviated by the slit portion, and the influence of this deformation force on the annular portion. Can be reduced, and the annular portion can be prevented from being greatly deformed or displaced unexpectedly.

The anticorrosion ring of the present invention is
The extension portion is formed with a relief portion that avoids a screwing member screwed into the fluid pipe.
According to this feature, when the screwing member used to fix the other member such as the insertion ring is screwed to the fluid pipe, the extending portion is not obstructed, and the screwing member can be easily inserted. Become.

It is a sectional side view which shows the aspect of the insertion tube which the anticorrosion ring in Example 1 fitted. (A) is a top view which shows an anticorrosion ring, (b) is a rear view similarly. (A) is a top view which shows an insertion ring, (b) is a rear view similarly. FIG. 3 is a cross-sectional side view taken along line AA in FIG. 2. It is a sectional side view which shows the state before attaching a corrosion prevention ring to the edge part of an insertion tube. It is side sectional drawing which shows the state after attaching a corrosion prevention ring to the edge part of an insertion tube. It is side sectional drawing which shows the state after attaching an insertion ring to the edge part of an insertion tube. (A) is a sectional side view showing the anticorrosion ring in Example 2, and (b) is a sectional side view showing the anticorrosion ring in Example 3. (A) is a top view which shows the anticorrosion ring in Example 4, (b) is a top view which shows the anticorrosion ring in Example 5, (c) is a plane which shows the anticorrosion ring in Example 6. It is a figure and (d) is a top view which shows the anticorrosion ring in Example 7. FIG. It is a top view which shows the anticorrosion ring in Example 8. FIG. It is a sectional side view which shows the state after attaching the anticorrosion ring in Example 8 to the edge part of an insertion tube. It is a top view which shows the anticorrosion ring in Example 9. FIG. It is a sectional side view which shows the state after attaching the anticorrosion ring in Example 9 to the edge part of an insertion tube.

  The form for implementing the anticorrosion ring which concerns on this invention is demonstrated below based on an Example.

  The anticorrosion ring according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the insertion tube 1 as a fluid tube of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, and is formed in a substantially circular shape in cross section, and has an inner peripheral surface. Is covered with a mortar layer. In addition, the fluid pipe according to the present invention may be made of metal such as cast iron and steel. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In the present embodiment, the fluid in the fluid pipe is not limited to the clean water of the present embodiment, but may be, for example, industrial water, agricultural water, sewage, etc., or a gas-liquid mixture of gas and gas and liquid. Absent.

  Moreover, the outer peripheral surface of the insertion tube 1 is coated to prevent corrosion. The distal end of the insertion tube 1 is inserted into the reception port 3 formed at the end of the reception tube 2. Similarly to the insertion tube 1, the receiving tube 2 is made of ductile cast iron, is formed in a substantially circular shape in cross section, and the inner peripheral surface is covered with a mortar layer. Furthermore, the outer peripheral surface and the end of the receiving tube 2 are also coated to prevent corrosion.

  As shown in FIG. 1, the receiving portion 3 is a portion having a larger diameter than other portions of the receiving tube 2, and the tip of the receiving portion 3 has an inner diameter larger than the outer diameter of the insertion tube 1. Is also formed on the inner peripheral surface of a large diameter. Further, a packing holding strip 5 which is a groove for holding the rubber packing ring 4 is formed on the inner peripheral surface at the tip of the receiving portion 3. Further, a lock ring holding strip 7 which is a groove for holding the metal lock ring 6 is formed on the inner side of the packing holding strip 5. The lock ring 6 is held by the lock ring holding strip 7 in a state where a rubber centering ring 8 that defines the axis of the lock ring 6 is disposed on the outer periphery thereof.

  Further, the end portion of the insertion tube 1 on the tube axis direction side is inserted into the receiving portion 3 of the receiving tube 2. The insertion tube 1 is cut at, for example, a construction site in order to adjust the length thereof, and the end surface 9 of the insertion tube 1 is connected to the insertion tube 1 with respect to the tube axis. The cut surface is formed by cutting substantially orthogonally. A metal substrate (in this embodiment, ductile cast iron) of the insertion tube 1 itself is exposed on the end surface 9 which is a cut surface.

  An anticorrosion ring 10 for preventing corrosion of the end surface 9 is attached to the end surface 9 of the insertion tube 1. Further, a metal insertion ring 11 is attached so as to cover the outside of the anticorrosion ring 10. When the insertion tube 1 is attached to the receiving tube 2, the packing ring 4, the centering ring 8, and the lock ring 6 are attached to the inner peripheral surface of the receiving tube 2, and the distal end portion of the insertion tube 1. With the anticorrosion ring 10 and the insertion ring 11 attached thereto, the insertion tube 1 is pushed into the receiving portion 3 of the receiving tube 2.

  In addition, the packing ring 4 expands in diameter when the insertion ring 11 attached to the insertion tube 1 is pushed. Further, the lock ring 6 has a substantially C shape in a front view with a part of the circumference cut away, and the lock ring 6 expands together with the centering ring 8 when the insertion ring 11 is pushed. The diameter can be adjusted.

  Further, after the insertion tube 1 is inserted into the receiving portion 3 of the receiving tube 2, the inside of the inserted insertion tube 1 and the receiving tube 2 that are connected to each other is sealed in a sealing manner by the packing ring 4. At the same time, the insertion tube 1 is held by the lock ring 6 so as not to be detached from the receiving portion 3 of the receiving tube 2.

  Next, the anticorrosion ring 10 in a present Example is explained in full detail. As described above, the anticorrosion ring 10 is attached to the end of the insertion tube 1, and the insertion ring 11 is attached to the outside thereof.

  As shown in FIGS. 2A and 2B, the anticorrosion ring 10 extends in the tube axis direction along the outer peripheral surface of the insertion tube 1 when attached to the end of the insertion tube 1. An extending portion 12 provided, an annular portion 13 extending in the tube diameter direction along the end surface 9 of the insertion tube 1 and covering the end surface 9, and the insertion tube 1 in the annular portion 13 The anti-corrosion member 14 which is arrange | positioned at the end surface 9 side and protects this end surface 9 is provided. The extending portion 12 has a substantially cylindrical shape along the outer peripheral surface of the insertion tube 1, and the annular portion 13 has an annular shape that is substantially perpendicular to the tube axis of the insertion tube 1.

  In FIG. 4 to FIG. 7, the right side of the drawing is described as the front side (front side) of the anticorrosion ring 10. As shown in FIG. 4, the extending portion 12 and the annular portion 13 of the anticorrosion ring 10 are disposed so as to form a substantially L shape in a sectional view. The extended portion 12 of the anticorrosion ring 10 is formed of a soft portion that can be elastically deformed as a whole. And the soft part which comprises the extension part 12 is integrally extended from the extension part 12 to the surface side of the annular part 13, and the surface side (front side) of this annular part 13 is formed with the soft part 15. In addition, the back surface side (back surface side) of the annular portion 13 is also formed by the soft portion 16.

  In the present embodiment, the extending portion 12 and the soft portions 15 and 16 are made of a soft resin material such as an elastomer. In addition, a hard part 17 extending along the circumferential direction of the annular part 13 and harder than the extended part 12 and the soft parts 15 and 16 is provided so as to be sandwiched between the soft parts 15 and 16 on the front surface side and the back surface side. doing. In this embodiment, the hard portion 17 is made of a hard resin material such as polypropylene. Furthermore, the extension part 12 and the annular part 13 of the anticorrosion ring 10 are formed by integrating the extension part 12, the soft parts 15, 16 and the hard part 17. At this time, the extended portion 12 and the soft portions 15 and 16 and the hard portion 17 may be integrally formed by insert molding or two-color molding. The soft portion and the hard portion are not necessarily limited to those made of the material of the present embodiment. For example, the soft portions 15 and 16 are made of an elastic body such as rubber, and the hard portion 17 is made of a metal such as stainless steel. In this way, if at least the hard part is harder than the soft part, it may be made of an appropriate resin material or the like.

  The hard portion 17 extends in the tube radial direction along the end surface 9 of the insertion tube 1 and is an annular flat plate-like member extending in the circumferential direction so as to be substantially perpendicular to the tube axis. It has become. Further, the hard portion 17 is formed with a communication portion 18 that communicates from the front surface side to the back surface side, and the soft portion 15 on the front surface side and the soft portion 16 on the back surface side are integrated with each other via the communication portion 18. It is connected. The communication portion 18 is located on the outer diameter side of the center of the length of the annular portion 13 in the pipe radial direction. In addition, although the communication part 18 in a present Example is a substantially circular hole formed in three places at predetermined intervals in the circumferential direction of the hard part 17, the number or shape of a communication part is restricted to a present Example. For example, a predetermined number of communication portions formed in the long holes may be formed in the circumferential direction.

  By doing in this way, the soft parts 15 and 16 and the hard part 17 are firmly connected to each other by the part that enters the communication part 18 in the soft parts 15 and 16, and the front side and the back side are integrated. The hard portions 17 are sandwiched by the soft portions 15 and 16 thus formed, and there is no possibility that the soft portions 15 and 16 and the hard portions 17 are peeled off from each other. Further, the insertion ring 11 is installed around the anticorrosion ring 10 depending on the position of the communication portion 18, and when the extension portion 12 is pulled, the anticorrosion surface is effectively brought into close contact with the end surface 9 of the insertion tube 1. The extending portion 12 in this embodiment is integrally connected to the soft portion 15 on the surface side of the annular portion 13. Furthermore, the radial width dimension of the soft part 15 on the surface side of the annular part 13 is formed shorter than the radial dimension of the hard part 17, and the inner peripheral edge of the hard part 17 is exposed on the surface side.

  Further, the above-described anticorrosion member 14 is annularly arranged along the annular portion 13 on the end surface 9 side of the insertion tube 1 in the annular portion 13, that is, on the back surface side of the annular portion 13. In addition, the anticorrosion member 14 of a present Example is a low rebound resilience material, ie, a material with a comparatively low resilience elastic modulus, and is comprised by the butyl rubber which has adhesive force. The anticorrosion member 14 is made of butyl rubber in this embodiment, but is made of an elastic body such as natural rubber or urethane rubber, soft resin such as soft vinyl chloride, styrene, or olefin, or putty / epoxy. A resin adhesive may be used.

  In addition, the arrangement surface of the anticorrosion member 14 in the annular portion 13 is a tapered surface 19 formed so that the inner diameter side gradually protrudes toward the end surface 9 of the insertion tube 1, and the anticorrosion member 14 is accommodated by the tapered surface 19. An accommodating area is formed. The tapered surface 19 is formed so that the soft portion 16 on the back surface side in the annular portion 13 becomes thinner as it approaches the outer periphery. In the anticorrosion ring 10 in the first embodiment, the back surface side soft portion 16 is thinned. The soft part 16 and the extended part 12 are not connected.

  Moreover, the corner | angular part of the outer periphery of the hard part 17 in the cyclic | annular part 13 is the taper surface 20 formed along this outer periphery. As will be described later, when the insertion ring 11 contacts the annular portion 13, the tapered surface 20 can release the sliding of the insertion ring 11 by the tapered surface 20. 13 is reduced, and the annular portion 13 is prevented from being greatly deformed or displaced unexpectedly by the mounting operation of the insertion ring 11.

  In addition, the inner diameter N of the extended portion 12 is substantially the same as the outer diameter of the insertion tube 1, but the outer diameter G of the hard portion 17 in the annular portion 13 is larger than the outer diameter of the insertion tube 1. The predetermined dimension D is a small diameter. Thus, by making the outer diameter G of the hard portion 17 smaller than the outer diameter of the insertion tube 1 by a predetermined dimension D, the hard portion 17 can be prevented from protruding in the outer diameter direction.

  Next, the upper side of the paper surface in FIG. 3A will be described as the front side (front side) of the insertion ring 11, and FIG. 3B will be described as the rear view (back side) of the insertion ring 11. The insertion ring 11 is a metal cylindrical portion 21 having a short cylindrical shape, and is extended to the front side of the cylindrical portion 21 so as to cover the end surface 9 of the insertion tube 1 together with the anticorrosion ring 10. And a reduced diameter portion 22 (see FIG. 6). Further, a part of the insertion ring 11 is cut out to form a divided portion 23 and has a substantially C shape.

  Further, the inner diameter of the cylindrical portion 21 of the insertion ring 11 is substantially the same as or slightly larger than the outer diameter of the insertion tube 1. Further, an insertion hole 24 through which a tapping screw (not shown) for fixing the insertion ring 11 to the insertion tube 1 is inserted is formed in the vicinity of the dividing portion 23 in the cylindrical portion 21 of the insertion ring 11. Yes. The diameter-reduced portion 22 of the insertion ring 11 is formed with a notch 25 that is notched in the radial direction. Moreover, the protruding item | line 26 extended along the circumferential direction is formed in the internal peripheral surface of the diameter reducing part 22 of the insertion ring 11 (refer FIG. 6).

  Next, an operation process when attaching the anticorrosion ring 10 and the insertion ring 11 to the insertion tube 1 will be described. As shown in FIG. 5, first, the insertion tube 1 is cut at a construction site in order to adjust its length, and along the outer circumferential surface near the end surface 9 of the insertion tube 1 along the circumferential direction. An extending groove 27 is formed. As described above, the metal base (in the present embodiment, ductile cast iron) of the insertion tube 1 itself is exposed on the end surface 9 (cut surface) of the insertion tube 1, and the groove 27 of the insertion tube 1 is exposed to the groove 27. In addition, the metal base of the intubation tube 1 itself is exposed. In addition, the position where the groove 27 of the insertion tube 1 is formed is a position corresponding to the protrusion 26 of the insertion ring 11 described above with a certain degree of tolerance.

  And the anticorrosion tape 28 for preventing corrosion, such as rust which generate | occur | produces from this groove 27, is affixed on the groove 27 over the perimeter. The anticorrosion tape 28 is formed of an elastic body such as rubber. Next, in a state where the extended portion 12 of the anticorrosion ring 10 is raised to the surface side (front side) that is opposite to the end surface 9 side of the insertion tube 1, the back surface side of the annular portion 13 of the anticorrosion ring 10 ( The back side is attached to the end face 9 of the insertion tube 1. In addition, since the anticorrosion member 14 on the back surface side of the annular portion 13 has adhesive force, the anticorrosion ring 10 can be temporarily fixed to the end surface 9 of the insertion tube 1 by this adhesive force. Moreover, when the outer diameter of the insertion tube 1 is sufficiently smaller than the inner diameter N of the extending portion 12, the anticorrosion ring 10 may be attached as it is without being raised.

  As shown in FIG. 6, after attaching the annular portion 13 of the anticorrosion ring 10 to the end surface 9 of the insertion tube 1, the extended portion 12 in the state of being raised is returned, and this extended portion 12 is connected to the outer periphery of the insertion tube 1. Try to follow the surface. And as shown in FIG. 7, the insertion ring 11 is attached so that the outer side of the anticorrosion ring 10 may be covered. At this time, the protrusion 26 of the insertion ring 11 is loosely fitted into the groove 27 of the insertion tube 1. In addition, with the insertion ring 11 attached, the clamping members (not shown) that sandwich the inner surface near the end of the insertion tube 1 and the cylindrical portion 21 of the insertion ring 11 are equally spaced along the circumferential direction. Place multiple.

  In addition, the insertion ring 11 is formed with the split portion 23 and the notch portion 25, so that the diameter of the insertion ring 10 can be easily increased using a specific diameter expansion jig (not shown). It can be attached to a predetermined location of the intubation tube 1. The insertion ring 11 is reduced in diameter while being sandwiched by the clamping member, and the inner diameter of the cylindrical portion 21 of the insertion ring 11 and the outer diameter of the insertion tube 1 are approximately the same size. I will fix it. At this time, if a lubricant such as silicon grease is applied and then attached, the anticorrosion ring 10 is less likely to be wrinkled.

  As described above, the outer diameter G of the hard portion 17 is smaller than the outer diameter of the insertion tube 1 by the predetermined dimension D (see FIG. 4), so that the hard portion 17 does not protrude in the outer diameter direction. Thus, when the diameter of the insertion ring 11 is reduced, it is possible to prevent the inner peripheral surface of the cylindrical portion 21 of the insertion ring 11 from pressing the hard portion 17 and deforming the hard portion 17.

  Further, the tapered surface 20 on the outer peripheral edge of the hard portion 17 can release the sliding of the insertion ring 11 by the tapered surface 20 when the inner surface of the insertion ring 11 contacts the annular portion 13. Furthermore, a tapered surface 29 having an inclination angle similar to that of the tapered surface 20 of the hard portion 17 is formed on the inner surface of the insertion ring 11 at a position corresponding to the tapered surface 20 of the outer peripheral edge of the hard portion 17.

  The tapered surface 29 of the insertion ring 11 presses the soft portion 15 on the front surface side of the annular portion 13 of the anticorrosion ring 10, and the pressing force is evenly applied to the soft portion 16 on the back surface side through the hard portion 17. It comes to join. Further, the tapered surface 29 of the insertion ring 11 and the soft portion 15 on the surface side of the annular portion 13 of the anticorrosion ring 10 are in close contact, and the anticorrosion ring 10 is firmly fixed by the insertion ring 11.

  Further, when the insertion ring 11 is brought into contact with the soft portion 15 on the surface side of the annular portion 13 of the anticorrosion ring 10, the soft portion 15 allows the assumed deformation of the annular portion 13, and the insertion ring 11. And the soft part 15 of the anticorrosion ring 10 can be increased in adhesion, and the pressing force applied to the soft part 15 is evenly distributed by the hard part 17, so that the end face 9 side (back side) of the intubation tube 1 is obtained. ) And the anticorrosion member 14 can be pressed against the end face 9 of the intubation tube 1.

  In addition, when the anticorrosion member 14 is arrange | positioned in the back surface side of the annular part 13, and the back surface side of this annular part 13 is comprised by the soft part 16, when the anticorrosion member 14 contacts the end surface 9 of the insertion tube 1 The anticorrosion member 14 is pressed toward the end surface 9 of the insertion tube 1 by the elasticity of the soft portion 16 of the annular portion 13, and the anticorrosion member 14 is brought into close contact with the end surface 9 of the insertion tube 1. it can.

  Thereafter, a drill (not shown) is inserted through the insertion hole 24 of the insertion ring 11 to form a through hole (not shown) in the extended portion 12 of the anticorrosion ring 10, and on the outer peripheral surface of the insertion tube 1. A pilot hole (not shown) for screwing a tapping screw (not shown) is formed. Then, when the tapping screw is inserted into the insertion hole 24 and screwed into the pilot hole (not shown) of the insertion tube 1, the attachment work of the anticorrosion ring 10 and the insertion ring 11 is completed. Thus, the end face 9 of the insertion tube 1 can be covered with the anticorrosion ring 10, and corrosion prevention such as rust generated from the end surface 9 of the insertion tube 1 where the metal base is exposed can be performed. As described above, since the insertion position of the insertion ring 11 has a tolerance in the formation position of the groove 27, there is a gap between the surface side of the anticorrosion ring 10 and the inner surface side of the reduced diameter portion 22 of the insertion ring 11. Even in such a case, the anticorrosion member 14 is effectively brought into close contact with the end face 9 of the insertion tube 1 by the action of the position of the connecting portion 18 described above, and sufficient anticorrosion properties are maintained. Can do.

  As described above, in the anticorrosion ring 10 according to the present embodiment, the extending portion 12 is formed of an elastically deformable soft portion, and the annular portion 13 extends along the circumferential direction of the annular portion 13 so as to be a soft portion. By having the hard part 17 harder than 15 and 16, it can reinforce without expanding the thickness dimension of the annular part 13 by the hard part 17, and the shape of the annular part 13 can be maintained. Even when the extension portion 12 formed by the soft portion is elastically deformed when the anticorrosion ring 10 is attached to the end of the ring portion 13, the portion having the hard portion 17 in the annular portion 13 regulates the deformation and the shape of the annular portion 13. Thus, the anticorrosion ring 10 can be easily attached, and the hard portion 17 can prevent the annular portion 13 from being greatly deformed or shifted unexpectedly.

  The annular portion 13 has a hard portion 17 that extends along the radial direction (width direction) of the annular portion 13 and is harder than the soft portions 15 and 16, so that the annular portion 13 is entirely in the width direction. Thus, the hard part 17 can prevent the annular part 13 from being greatly deformed or displaced unexpectedly.

  Moreover, the hard part 17 should just be arrange | positioned at least at the outer peripheral end vicinity of the annular part 13, and when attaching the anticorrosion ring 10 to the edge part of the insertion tube 1, the annular part which is a boundary with the extension part 12 The hard portion 17 disposed at least in the vicinity of the outer peripheral end of 13 prevents the deformation stress generated by the elastic deformation of the extending portion 12 from being transmitted to the annular portion 13, and the annular portion 13 is greatly deformed unexpectedly. It can prevent shifting.

  In addition, the hard part 17 should just be arrange | positioned at least at the inner peripheral end vicinity of the annular part 13, and when attaching the anticorrosion ring 10 to the edge part of the insertion tube 1, the inner periphery of the annular part 13 which deform | transforms most easily It is possible to prevent the shape of the edge edge from being greatly deformed or shifted unexpectedly.

  Further, the hard portion 17 extends in the circumferential direction along the end surface 9 of the insertion tube 1 and is an annular plate member that covers the end surface 9. The stress applied to 13 is evenly distributed by the hard portion 17 forming the plate-like member, and the entire annular portion 13 can be uniformly pressed against the end surface 9 of the inlet tube 1.

  Further, the soft portions 15 and 16 are integrally extended from the extended portion 12 to a part of the annular portion 13, and at least the end face side of the insertion tube 1 is configured by the soft portion 16. Thus, the extending portion 12 and the annular portion 13 are integrally joined to each other from the extending portion 12 to the annular portion 13, and the extending portion 12 and the annular portion 13 are peeled off from each other. Not only is there no danger, but when the diameter of the insertion ring 11 is reduced, the soft portion 16 of the annular portion 13 is pressed against the end surface 9 of the insertion tube 1, and the end surface 9 of the insertion tube 1 is elastically deformed. The soft portion 16 can be brought into close contact with each other.

  Further, the back surface side of the annular portion 13 is a tapered surface 19, and when the anticorrosion ring 10 is attached to the end portion of the intubation tube 1 by forming an accommodating region for accommodating the anticorrosion member 14, The anticorrosion member 14 can be accommodated in the accommodating region in the annular portion 13, so that even if the anticorrosion member 14 is deformed along the end surface 9 of the insertion tube 1, the anticorrosion member 14 is not leaked in the inner diameter direction. Become.

  Next, the anticorrosion ring according to Examples 2 to 9 will be described with reference to FIGS. In addition, the description which overlaps with the same structure as the said Example is abbreviate | omitted.

  As shown in FIG. 8A, in the anticorrosion ring 10a in the second embodiment, the arrangement surface of the anticorrosion member 14 in the annular portion 13 is a tapered surface 19 like the anticorrosion ring 10 in the first embodiment. The soft portion 16a on the back surface side in the annular portion 13 becomes thinner as it approaches the outer periphery, but the soft portion 16a on the back surface side has a predetermined thickness left on the back surface side. The soft portion 16a is integrally connected to the extending portion 12.

  By doing in this way, the soft part 15 on the surface side of the annular part 13 and the soft part 16a on the back side are both integrally connected to the extending part 12, and the extending part 12 and the annular part 13 are mutually connected. As a result, the extended portion 12 and the annular portion 13 can be separated from each other.

  As shown in FIG. 8 (b), unlike the first embodiment, the anticorrosion ring 10b in the third embodiment is not provided with a soft portion on the surface side of the annular portion 13. In the annular portion 13 in the third embodiment, The soft portion is integrally extended from the extended portion 12 to the back surface side of the annular portion 13, and the soft portion 16 b is formed only on the back surface side (back surface side) of the annular portion 13. A part of the soft part 16 b on the back side enters the communication part 18 formed in the hard part 17. By doing in this way, the soft part 16b and the hard part 17 are firmly connected to each other by the portion of the soft part 16b entering the communication part 18, and the soft part 16b and the hard part 17 are peeled off from each other. There is no fear. Moreover, since the soft part 16b is formed only in the back surface side (back surface side) of the annular part 13. FIG. The material used for the soft part 16b can be saved.

  As shown in FIG. 9A, in the anticorrosion ring 10c in the fourth embodiment, a slit portion 30 extending in the tube axis direction is formed in a part of the extending portion 12. By forming the slit portion 30 in the extended portion 12, the outer diameter of the insertion tube 1 to which the anticorrosion ring 10c is attached is larger or smaller than the inner diameter of the extended portion 12 of the anticorrosion ring 10. However, since the slit portion 30 is formed, the extending portion 12 can be expanded or contracted. By doing in this way, when the insertion ring 11 contacts the extended portion 12, the deformation force applied to the extended portion 12 is relaxed by the slit portion 30, and this deformation force is applied to the annular portion 13. The influence exerted is reduced, and the annular portion 13 can be prevented from being greatly deformed or displaced unexpectedly.

  As shown in FIG. 9B, in the anticorrosion ring 10d according to the fifth embodiment, an opening formed by being largely cut off in the circumferential direction at a portion where the tapping screw (not shown) in the extended portion 12 is inserted. A portion 31 is formed. By doing so, the tapping screw can be easily inserted, and the deformation force applied to the extended portion 12 when the insertion ring 11 contacts the extended portion 12 is relieved by the opening 31. Thus, the influence of the deformation force on the annular portion 13 is reduced, and the annular portion 13 can be prevented from being greatly deformed or displaced unexpectedly. Here, in Example 5, the opening part 31 comprises the escape part of this invention.

  As shown in FIG. 9C, in the anticorrosion ring 10e according to the sixth embodiment, the round holes 32 are formed at two predetermined positions that are portions through which the tapping screws (not shown) are inserted in the extended portion 12. Yes. By doing in this way, it becomes easy to insert the said tapping screw. Here, in Example 6, the round hole 32 comprises the escape part of this invention.

  As shown in FIG. 9 (d), in the anticorrosion ring 10f according to the seventh embodiment, square holes having a substantially square shape at two predetermined positions that are portions through which tapping screws (not shown) are inserted in the extended portion 12f. 33 is formed. Furthermore, the width dimension of the extension part 12f of the anticorrosion ring 10f in Example 7 is formed longer than the width dimension of the extension part 12 of Example 1, and is formed in the vicinity of the end part of the inlet tube 1 described above. The groove 27 thus formed can be covered by the extending portion 12f. By doing in this way, the anticorrosion tape 28 used in Example 1 can be omitted. Here, in Example 7, the square hole 33 constitutes the relief portion of the present invention.

  As shown in FIGS. 10 and 11, in the anticorrosion ring 10g according to the eighth embodiment, the width of the extended portion 12g is formed longer than the width of the extended portion 12 of the first embodiment. The groove 27 formed in the vicinity of the end of 1 can be covered with the extending portion 12g. By doing in this way, the anticorrosion tape 28 used in Example 1 can be omitted. In addition, when the protrusion 26 of the insertion ring 11 is loosely fitted into the groove 27 of the insertion tube 1, the shape of the extending portion 12 g is deformed along the inner surface of the groove 27, and the entire inner surface of the groove 27 is formed. Can be covered with the extending portion 12g, and corrosion prevention such as rust generated from the groove 27 where the metal substrate is exposed can be performed.

  As shown in FIG.12 and FIG.13, in the anticorrosion ring 10h in Example 9, the width dimension of the extension part 12h is formed longer than the width dimension of the extension part 12 of Example 1, and an insertion tube The groove 27 formed in the vicinity of the end of 1 can be covered with the extending portion 12h. Furthermore, the extended portion 12 h has a groove covering portion 34 that is formed in advance in accordance with the inner surface shape of the groove 27 of the insertion tube 1. By doing in this way, the anticorrosion tape 28 used in Example 1 can be omitted. Further, when the protruding portion 26 of the insertion ring 11 is loosely fitted into the groove 27 of the insertion tube 1 and the extending portion 12 h is pressed by the protruding row 26, the extending portion 12 h becomes unexpected. Deformation can be prevented.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the said Example, although the hard part 17 of the annular part 13 has comprised the cyclic | annular form which makes a substantially right angle with the tube axis of the insertion tube 1, the hard part 17 does not need to be cyclic | annular and it is predetermined on the circumference. You may divide | segment for every space | interval, You may divide | segment the position corresponding to the division part 23 of the insertion ring 11, and you may form the hard part 17 in a substantially C shape similarly to the insertion ring 11. FIG.

  Moreover, in the said Example, although the hard part 17 of the annular part 13 is a cyclic | annular flat plate-shaped member which makes a substantially right angle with the tube axis of the insertion tube 1, the hard part 17 is not a plate-shaped member. Alternatively, the hard portion 17 may be formed in a rod-like member or a net-like member.

  Moreover, in the said Example, although the annular part 13 was comprised by the hard part 17 and the soft parts 15 and 16, the whole annular part 13 may be comprised by the hard part 17. FIG.

  Moreover, in the said Example, although the hard part 17 of the annular part 13 is a cyclic | annular flat plate-shaped member which makes a substantially right angle with the tube axis of the insertion tube 1, the part which hits the division part 23 of the insertion ring 11 Only a part may be extended in the tube axis direction to form a convex portion, and the convex portion may be aligned with the divided portion 23 to position the insertion ring 11 and the anticorrosion ring 10.

  Moreover, in the said Example, although the soft part 15 of the surface side and the soft part 16 of the back side are integrated, it forms by adhere | attaching or welding to the hard part 17 as what divided each soft part. May be.

1 Inlet tube (fluid tube)
9 End face 10, 10a-10h Corrosion prevention ring 11 Insertion ring 12, 12f-12h Extension part (soft part)
13 Annular part 14 Anticorrosion member 15, 16, 16a, 16b Soft part 17 Hard part 30 Slit part 31 Opening part (relief part)
32 Round hole (flank)
33 Square hole (flank)

Claims (7)

An extending portion extending in the tube axis direction along the outer peripheral surface of the fluid pipe, and an annular portion extending in the tube diameter direction along the end surface of the fluid pipe and forming an annular shape covering the end surface. Anti-corrosion ring,
The extension portion is formed of an elastically deformable soft portion, and the annular portion has a hard portion that extends along a circumferential direction of the annular portion and is harder than the soft portion. ring.   The anticorrosion ring according to claim 1, wherein the hard portion is disposed at least in the vicinity of an outer peripheral end of the annular portion.   3. The anticorrosion ring according to claim 1, wherein the hard portion is an annular plate-like member that extends in a circumferential direction along an end surface of the fluid pipe and covers the end surface.   The soft portion is integrally extended from the extended portion to a part of the annular portion, and at least the end surface side of the fluid pipe is configured by the soft portion. The anticorrosion ring according to any one of 1 to 3.   It further includes an anticorrosion member disposed on the end surface side of the fluid pipe in the annular portion to prevent the end surface, and an accommodation region for accommodating the anticorrosion member is formed in an arrangement portion of the anticorrosion member in the annular portion. The anticorrosion ring according to any one of claims 1 to 4, wherein the anticorrosion ring is provided.   The anticorrosion ring according to any one of claims 1 to 5, wherein a slit portion extending in a tube axis direction is formed in the extending portion.   The anticorrosion ring according to any one of claims 1 to 6, wherein an escape portion that avoids a screwing member screwed into the fluid pipe is formed in the extending portion.

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