JP2015090158A - Flange type pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily make level difference between a flange body and a core collar portion of an anticorrosive core become dimensions as designed.SOLUTION: A flange type pipe joint 10 is equipped with a flange body 20, an anticorrosive core 22, and an adhesion layer 24. The flange body 20 has an outer cylindrical portion 30, and a flange collar portion 32. Openings 40 are formed at one end portion and the other end portion of the outer cylindrical portion 30. The outer cylindrical portion 30 has a core adhesive portion 50. The core adhesive portion 50 surrounds the opening 40 at the one end portion of the outer cylindrical portion 30. The flange collar portion 32 is provided on an outer periphery of the outer cylindrical portion 30. The anticorrosive core 22 has an inner cylindrical portion 100 and a core collar portion 104. The inner cylindrical portion 100 is inserted in the outer cylindrical portion 30. The core collar portion 104 is provided on the outer periphery of the inner cylindrical portion 100. The core collar portion 104 is fitted with the core adhesive portion 50. An adhesive layer 24 bonds the core adhesive portion 50 and the core collar portion 104. The core adhesive portion 50 has an adhesive layer storing portion 74. In the adhesive layer storing portion 74, a part of the adhesive layer 24 is stored.

Description

  The present invention relates to a flange-type pipe joint.

  Patent Document 1 discloses a flange-type pipe joint. This flange-shaped pipe joint has a taper female thread portion on the inner periphery. The taper male screw portion at the end of the steel pipe is screwed into the taper female screw portion. The flange portion of this flange-type pipe joint is tightened with a bolt. A left female thread portion is provided on the inner periphery of the flange-type pipe joint. An anticorrosion core made of resin is screwed into the left female screw portion. For this reason, the anticorrosion core has a left male screw part. The anticorrosion core is bonded to the flange type pipe joint. The anticorrosion core has a collar portion and a cylindrical portion in addition to the left male screw portion. The tube portion has a tapered surface. This taper surface continues to the left male screw portion. This taper surface forms a gap between the taper female thread portion on the inner periphery of the flange-type pipe joint. The end of the steel pipe is sandwiched between the gaps. An elastic ring is fitted in a portion corresponding to the bottom of the gap.

JP 7-71666 A

  In the flange-type pipe joint disclosed in Patent Document 1, when the main body and the core are bonded, if the amount of the adhesive is large, the adhesive between the main body and the core collar becomes thick, so the flange portion and the anticorrosive core There is a problem that a step larger than the design value is formed between the heel portion. Such a large step causes fluid leakage from the flange type pipe joint. Further, it is difficult to adjust the amount of the adhesive and the application position.

  The present invention solves this problem. An object of the present invention is to provide a flange-type pipe joint in which the step between the flange main body and the core flange of the anticorrosion core can be easily sized as designed.

  The flange type pipe joint of the present invention will be described with reference to the drawings. The reason why the symbols in the figure are used in this column is to help understand the content of the invention. The use of the symbols in the figure in this column is not intended to limit the scope of the invention to the scope shown.

  In order to achieve the above-described object, according to one aspect of the present invention, the flange-type pipe joint 10 includes flange bodies 20 and 220, an anticorrosion core 22, and an adhesive layer 24. The flange main bodies 20 and 220 have an outer cylinder portion 30 and a flange flange portion 32. Openings 40 and 42 are formed at one end and the other end of the outer cylinder 30. The outer cylinder part 30 has core adhesion parts 50 and 250. The core bonding parts 50 and 250 surround the opening 40 at one end of the outer cylinder part 30. The flange flange 32 is provided on the outer periphery of the outer cylinder 30. The anticorrosion core 22 has an inner cylinder part 100 and a core collar part 104. The inner cylinder part 100 is inserted into the outer cylinder part 30. The core flange 104 is provided on the outer periphery of the inner cylinder portion 100. The core flange 104 fits into the core bonding parts 50 and 250. The adhesive layer 24 bonds the core bonding portions 50 and 250 and the core flange portion 104. The core bonding portions 50 and 250 have bottom surfaces 70 and 270 and side walls 72. The bottom surfaces 70 and 270 surround the opening 40 at one end of the outer cylinder portion 30. The side wall 72 surrounds the bottom surfaces 70 and 270. The core bonding parts 50 and 250 further have an adhesive layer accommodating part 74. A part of the adhesive layer 24 is accommodated in the adhesive layer accommodating portion 74.

  An excessive volume of the adhesive layer 24 causes the adhesive layer 24 to be too thick. If the core adhesion parts 50 and 250 have the adhesion layer accommodating part 74, even if the volume of the adhesion layer 24 is too large, it is avoided that the adhesion layer 24 becomes too thick. This is because a part of the adhesive layer 24 is accommodated in the adhesive layer accommodating portion 74. Since it is avoided that the adhesive layer 24 becomes too thick, the step between the flange main bodies 20 and 220 and the core flange portion 104 of the anticorrosion core 22 can be easily set to a designed dimension.

  Further, it is desirable that the above-described adhesive layer accommodating portion 74 is provided between the bottom surface 70 and the side wall 72.

  When the adhesive layer accommodating portion 74 is provided between the bottom surface 70 and the side wall 72, the adhesive layer 24 easily spreads over the entire bottom surface 70. Since the adhesive layer 24 spreads, when the gap between the two flange-type pipe joints 10 is sealed, the surface pressure received by the core flange 104 is likely to be uniform.

  Alternatively, it is desirable that the adhesive layer accommodating portion 74 described above has a groove portion. The shape of the groove is annular. This groove surrounds the bottom surface 70.

  When the groove portion surrounds the bottom surface 70, for example, a part of the adhesive layer 24 is easily accommodated in the adhesive layer accommodation portion 74 as compared to a case where a plurality of depressions surround the bottom surface 70. Since it becomes easy to be accommodated in the adhesive layer accommodating part 74, it is avoided that the adhesive layer 24 becomes too thick.

  Further, the above-described bottom surface 70 may have an inner peripheral portion 290 and an outer peripheral portion 292. The inner peripheral part 290 surrounds the opening 40 at one end of the outer cylinder part 30. The outer peripheral portion 292 surrounds the inner peripheral portion 290. In this case, it is desirable that the adhesive layer accommodating portion 74 is provided between the inner peripheral portion 290 and the outer peripheral portion 292.

  When the adhesive layer accommodating portion 74 is provided between the inner peripheral portion 290 and the outer peripheral portion 292, the adhesive layer 24 between the inner peripheral portion 290 and the core flange portion 104 is formed between the outer peripheral portion 292 and the core flange portion 104. The possibility of spreading during the period is low. Even if the adhesive layer 24 spreads between the outer peripheral portion 292 and the core flange portion 104, the outer peripheral portion 292 is compared with the case where the adhesive layer accommodating portion 74 is not provided between the inner peripheral portion 290 and the outer peripheral portion 292. And the volume of the adhesive layer 24 extending between the core flange 104 and the core flange 104 becomes small. When the volume of the adhesive layer 24 is reduced, a portion of the core flange portion 104 that is not bonded to the outer peripheral portion 292 is widened. When the portion of the core flange 104 that is not bonded to the outer peripheral portion 292 becomes wider, the portion is easily elastically deformed. If the portion is easily elastically deformed, the step between the flange main body 20 and the core flange portion 104 of the anticorrosion core 22 can be easily set to a dimension as designed.

  According to the present invention, the level difference between the flange main body and the core flange portion of the anticorrosion core can be easily set to a dimension as designed.

It is a sectional view of a flange type pipe joint concerning an embodiment of the present invention. It is a perspective view of a flange main part concerning a certain embodiment of the present invention. It is sectional drawing of a core adhesion part and a seal part among flange main bodies concerning an embodiment with the present invention. It is a figure of the anticorrosion core concerning a certain embodiment of the present invention. It is sectional drawing of the flange main body concerning the modification of this invention.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[Description of structure]
FIG. 1 is a cross-sectional view of a flange-type pipe joint 10 according to the present embodiment. Based on FIG. 1, the structure of the flange type pipe joint 10 concerning this embodiment is demonstrated. The flange-type pipe joint 10 according to the present embodiment is used in a pair of two sheets or in combination with other flanges. The two flange-type pipe joints 10 are integrated by bolts and nuts (not shown). Those bolts and nuts are not shown. A gasket is sandwiched between the two flange-type pipe joints 10. The gasket is not shown. The flange-type pipe joint 10 according to this embodiment includes a flange main body 20, a corrosion-proof core 22, and an adhesive layer 24.

  FIG. 2 is a perspective view of the flange main body 20 according to the present embodiment. Based on FIG. 1 and FIG. 2, the structure of the flange main body 20 concerning this embodiment is demonstrated. In the case of this embodiment, the material of the flange body 20 is cast iron. Of course, the material of the flange body 20 is not limited to cast iron. The flange main body 20 according to the present embodiment includes an outer cylinder portion 30 and a flange flange portion 32. An opening 40 is formed at one end of the outer cylinder 30. An opening 42 is formed at the other end of the outer cylinder 30. Thereby, a steel pipe can be inserted into the outer cylinder part 30 from the opening 42 at the other end of the outer cylinder part 30. Note that the steel pipe is not shown in FIG. The outer cylinder part 30 has a core adhesive part 50 and a core fixing adhesive part 52. The core bonding part 50 surrounds the opening 40 of the outer cylinder part 30. The core fixing adhesive portion 52 is provided on the inner periphery of the outer cylinder portion 30. In the present embodiment, the core fixing adhesive portion 52 is provided with a female screw. The flange flange 32 is provided on the outer periphery of the outer cylinder 30. The flange flange 32 is fastened by the bolt and nut described above. The flange flange 32 has a seal portion 60. The seal portion 60 is disposed on the surface of the flange flange portion 32. The seal portion 60 is in close contact with the gasket. In the case of this embodiment, the shape of the seal part 60 is annular. The seal part 60 surrounds the core bonding part 50 of the outer cylinder part 30. When the two flange-type pipe joints 10 are integrated, the gap between the two flange-type pipe joints 10 is sealed by the gasket being in close contact with the seal portion 60.

  FIG. 3 is a cross-sectional view of the core bonding portion 50 and the seal portion 60 in the flange main body 20 according to the present embodiment. Based on FIG. 2 and FIG. 3, the structure of the core adhesion part 50 concerning this embodiment is demonstrated. The core bonding portion 50 according to the present embodiment includes a bottom surface 70, a side wall 72, and an adhesive layer accommodating portion 74. The bottom surface 70 surrounds the opening 40 of the outer cylinder part 30. Side wall 72 surrounds bottom surface 70. The adhesive layer accommodating portion 74 forms an accommodating space. A part of the adhesive layer 24 is accommodated in the accommodation space. As a result, the adhesive layer accommodating portion 74 accommodates a part of the adhesive layer 24. As shown in FIGS. 2 and 3, in the present embodiment, the adhesive layer accommodating portion 74 is provided between the bottom surface 70 and the side wall 72. As shown in FIG. 2, in the present embodiment, the adhesive layer accommodating portion 74 is formed of an annular groove surrounding the bottom surface 70.

  FIG. 4 is a diagram of the anticorrosion core 22 according to the present embodiment. In FIG. 4, the left half of the anticorrosion core 22 is a sectional view. Based on FIG. 1 and FIG. 4, the structure of the anticorrosion core 22 concerning this embodiment is demonstrated. In the present embodiment, the anticorrosion core 22 is made of polyethylene resin. The anticorrosion core 22 includes an inner cylinder portion 100, a retaining portion 102, a core flange portion 104, and a pipe inner surface seal portion 106. The inner cylinder part 100 is inserted into the outer cylinder part 30 through the opening 40 of the outer cylinder part 30. The shape of the inner cylinder part 100 is cylindrical. Thereby, the tip of the steel pipe inserted from the opening 42 of the outer cylinder part 30 enters between the outer cylinder part 30 and the inner cylinder part 100. Note that the steel pipe is not shown in FIG. An opening 110 is formed at one end of the inner cylinder portion 100. An opening 112 is formed at the other end portion of the inner cylinder portion 100. The retaining portion 102 is provided on the outer periphery of one end portion of the inner cylinder portion 100. In the case of this embodiment, the retaining portion 102 has a male screw. The male screw of the retaining portion 102 is screwed into the female screw of the core fixing adhesive portion 52 of the flange body 20. Since the male screw of the retaining portion 102 is screwed into the female screw of the core fixing adhesive portion 52, the inner cylindrical portion 100 is prevented from coming off from the outer cylindrical portion 30. The retaining portion 102 is connected to the flange main body 20 by the core fixing adhesive portion 52. The core fixing adhesive portion 52 fixes the anticorrosion core 22. Thereby, the anticorrosion core 22 is integrated with the flange main body 20. The core flange 104 is provided at one end of the inner cylinder portion 100. The core flange 104 is adjacent to the retaining portion 102. In the case of this embodiment, the core flange 104 is bonded to the core bonding portion 50. The core flange 104 is in close contact with the gasket together with the seal portion 60 of the flange body 20. The tube inner surface seal portion 106 is provided at the other end of the inner cylinder portion 100 (the end portion on the opposite side of the inner cylinder portion 100 from the side where the core flange portion 104 is provided). The pipe inner surface seal portion 106 is in close contact with the inner peripheral surface of the steel pipe. This steel pipe is a steel pipe that has entered between the outer cylinder part 30 and the inner cylinder part 100. When the pipe inner surface seal portion 106 comes into close contact with the inner peripheral surface of the steel pipe, the space between the anticorrosion core 22 and the steel pipe is sealed.

  The adhesive layer 24 according to the present embodiment will be described based on FIG. The adhesive layer 24 bonds the flange body 20 and the anticorrosion core 22. The retaining portion 102 is bonded to the core fixing adhesive portion 52 by the adhesive layer 24. The core flange 104 is bonded to the core bonding portion 50 by the adhesive layer 24. One end of the adhesive layer 24 is accommodated in the adhesive layer accommodating portion 74.

[Description of assembly method]
The assembly method of the flange-type pipe joint 10 according to the present embodiment is as follows. First, the manufacturer applies an adhesive to the retaining portion 102 or the core fixing adhesive portion 52. The adhesive is not applied to the entire core flange 104, but is applied to the retaining portion 102 or the core fixing adhesive portion 52. The adhesive may protrude from the core flange 104. An adhesive may be applied to a portion adjacent to the core fixing adhesive portion 52. When the adhesive is applied, the manufacturer inserts the inner cylinder part 100 of the anticorrosion core 22 into the outer cylinder part 30 of the flange main body 20. Subsequently, the manufacturer screws the anticorrosion core 22 into the flange body 20. With this screwing, the retaining portion 102 is connected to the flange body 20 by the core fixing adhesive portion 52. In this state, the manufacturer dries the adhesive applied to the core bonding portion 50. This drying completes the assembly of the flange-type pipe joint 10. The adhesive becomes the adhesive layer 24 by drying.

[Description of usage]
The method of using the flange-type pipe joint 10 according to this embodiment is the same as the method of using a conventionally known flange-type pipe joint. Therefore, detailed description thereof will not be repeated here.

[Effect of flange-type pipe joint according to this embodiment]
The flange-type pipe joint 10 according to the present embodiment has an adhesive layer accommodating portion 74. If the flange-shaped pipe joint 10 has the adhesive layer accommodating portion 74, it is avoided that the adhesive layer 24 becomes too thick even if the volume of the adhesive layer 24 is too large. This is because a part of the adhesive layer 24 is accommodated in the adhesive layer accommodating portion 74. Since it is avoided that the adhesive layer 24 becomes too thick, the level difference between the flange body 20 and the core flange portion 104 of the anticorrosion core 22 can be easily set to a dimension as designed.

  Further, when the adhesive layer accommodating portion 74 is provided between the bottom surface 70 and the side wall 72, the adhesive layer 24 easily spreads over the entire bottom surface 70. Since the adhesive layer 24 spreads, when the space between the two flange-type pipe joints 10 is sealed, the surface pressure received by the core flange 104 becomes uniform.

  Further, the adhesive layer accommodating portion 74 according to the present embodiment has a groove portion. The shape of the groove is annular. This groove surrounds the bottom surface 70. When the groove portion surrounds the bottom surface 70, for example, the adhesive layer accommodating portion 74 has a plurality of depressions, and a part of the adhesive layer 24 is compared to the case where the plurality of depressions surround the bottom surface 70. It becomes easy to be accommodated. Since it becomes easy to be accommodated in the adhesive layer accommodating part 74, it is avoided that the adhesive layer 24 becomes too thick.

<Description of modification>
The embodiments disclosed herein are illustrative in all respects. The scope of the present invention is not limited based on the above-described embodiment. Of course, various design changes may be made without departing from the spirit of the present invention.

  For example, the position of the adhesive layer accommodating portion 74 is not limited to that described above. FIG. 5 is a cross-sectional view of the core bonding portion 250 and the seal portion 60 in the flange main body 220 according to the modification of the present invention. In FIG. 5, the core adhesive portion 250 has a bottom surface 270, a side wall 72, and an adhesive layer accommodating portion 74. The bottom surface 270 surrounds the opening 40 of the outer cylinder part 30. Side wall 72 surrounds bottom surface 270. The bottom surface 70 has an inner peripheral part 290 and an outer peripheral part 292. The inner peripheral part 290 is in contact with the edge of the opening 40 of the outer cylinder part 30. The outer peripheral portion 292 surrounds the inner peripheral portion 290. The outer periphery 292 is adjacent to the side wall 72. As shown in FIG. 5, in the case of this modification, the adhesive layer accommodating portion 74 is disposed between the inner peripheral portion 290 and the outer peripheral portion 292. The rest of the configuration of the flange body 220 is the same as that of the flange body 20 shown in FIGS. 1 to 3. Even if the flange-shaped pipe joint 10 described above includes the flange main body 220 according to this modification instead of the flange main body 20 shown in FIGS. The level difference can be easily made as designed. Further, when the adhesive layer accommodating portion 74 is provided between the inner peripheral portion 290 and the outer peripheral portion 292, the adhesive layer 24 between the inner peripheral portion 290 and the core flange portion 104 becomes the outer peripheral portion 292 and the core flange portion. The possibility of spreading to 104 becomes low. Even if the adhesive layer 24 spreads between the outer peripheral portion 292 and the core flange portion 104, the outer peripheral portion 292 is compared with the case where the adhesive layer accommodating portion 74 is not provided between the inner peripheral portion 290 and the outer peripheral portion 292. And the volume of the adhesive layer 24 extending between the core flange 104 and the core flange 104 becomes small. When the volume of the adhesive layer 24 is reduced, a portion of the core flange portion 104 that is not bonded to the outer peripheral portion 292 is widened. When the portion of the core flange 104 that is not bonded to the outer peripheral portion 292 becomes wider, the portion is easily elastically deformed. If the portion is easily elastically deformed, the step between the flange main body 20 and the core flange portion 104 of the anticorrosion core 22 can be easily set to a dimension as designed.

  Further, the form of the adhesive layer accommodating portion is not limited to the above-described one. For example, the adhesive layer housing portion may have a plurality of depressions.

  Moreover, the form of the core fixing adhesion part of the flange main body and the form of the retaining part of the anticorrosion core 22 are not limited to those described above.

10 ... Flange type pipe joint,
20, 220 ... flange body,
22 ... Anti-corrosion core,
24 ... adhesive layer,
30 ... outer cylinder part,
32 ... flange flange,
40, 42, 110, 112 ... opening,
50, 250 ... core bonding part,
52 ... Core fixing adhesive part,
60 ... seal part,
70,270 ... bottom surface,
72 ... side wall,
74 ... Adhesive layer accommodating portion,
100 ... inner cylinder part,
102 ... retaining part,
104 ... Core buttocks,
106 ... pipe inner surface seal part,
290 ... Inner circumference,
292 ... outer periphery,

Claims (4)

An outer cylinder part having an opening formed in one end part and the other end part and having a core adhesion part surrounding the opening in the one end part; and a flange main body having a flange flange provided on the outer periphery of the outer cylinder part;
An anticorrosion core having an inner cylinder part inserted into the outer cylinder part, and a core collar part provided on an outer periphery of the inner cylinder part and fitted into the core bonding part;
An adhesive layer that bonds the core adhesive part and the core collar part;
The core bonding portion is
A bottom surface surrounding the opening of the one end portion of the outer cylinder portion;
A flange-shaped pipe joint having a side wall surrounding the bottom surface,
The flange-type pipe joint according to claim 1, wherein the core adhesive portion further includes an adhesive layer accommodating portion in which a part of the adhesive layer is accommodated.   The flange-type pipe joint according to claim 1, wherein the adhesive layer housing portion is provided between the bottom surface and the side wall.   The flange-type pipe joint according to claim 2, wherein the adhesive layer housing portion has an annular groove portion surrounding the bottom surface. The bottom surface is
An inner peripheral portion surrounding the opening of the one end portion of the outer cylinder portion;
An outer peripheral portion surrounding the inner peripheral portion,
The flange-type pipe joint according to claim 1, wherein the adhesive layer accommodating portion is provided between the inner peripheral portion and the outer peripheral portion.

Images