JP2023169540A - Pipe joint - Google Patents

Abstract

To provide a pipe joint for reducing work to be done at a position where a pipe is installed, out of work for connection to the pipe, and also reducing the requirement of a material excellent in corrosion resistance to fluid flowing inside.SOLUTION: A pipe joint 10 includes one cylindrical member 20, the other cylindrical member 22, an annular holder 24, and a seal part 26, the one cylindrical member 20 having one opening space formation part, one opposite face formation part, and a connection part, the other cylindrical member 22 having the other opening space formation part, the other opposite face formation part, and an entrance space formation part, the seal part being stored in a space formed by the entrance space formation part, together with the holder 24.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe joint.

Patent Document 1 discloses a pipe joint. This pipe joint includes a joint body, a tightening nut, and a biting ring. The joint body has a socket and a male thread. One end of the tube is inserted into the socket. The male thread is provided on the outer periphery of the socket. The tightening nut has an internal thread. The female thread screws into the male thread. The tightening nut is connected to the fitting body by an internal thread. The biting ring is inserted into the socket of the joint body. The bite ring fits around the outer circumference of the tube. The biting ring has a main body side taper part, a nut side taper part, and an overhang part. The main body side taper part is inserted into the socket part of the joint main body. The nut side taper part is inserted into the inside of the tightening nut. The projecting portion is provided between the main body side taper portion and the nut side taper portion. A contact portion and an in-body diameter reducing portion are provided on the inner periphery of the socket portion. The protruding portion comes into close contact with the contact portion. When the body-side tapered portion of the biting ring comes into contact with the body-side diameter reducing action portion, the body-side tapered portion exerts a diameter-reducing action on the body-side tapered portion. A ring promoting portion is provided on the inner periphery of the tightening nut. The ring propulsion portion contacts the nut-side taper portion of the biting ring to provide a diameter reducing action and a driving force to the biting ring. According to the pipe joint disclosed in Patent Document 1, sealing performance can be ensured, and the tightening nut can be easily tightened.

Japanese Patent Application Publication No. 2012-225354

The anti-corrosion pipe joint disclosed in Patent Document 1 has the problem that many of the operations for connecting the anti-corrosion pipe joint to a pipe must be performed at the location where the pipe is installed, and the corrosion resistance The problem is that it requires a large amount of high-quality materials.

It is an object of the present invention to reduce the amount of work that must be performed at the location where the pipe is installed to connect the pipe, and to reduce the amount of material that is highly resistant to corrosion against the fluid flowing inside the pipe. The purpose is to provide pipe joints that reduce the number of pipes.

The pipe joint of the present invention will be explained based on the drawings. Note that the reference numerals in the figures are used in this column to aid understanding of the content of the invention, and are not intended to limit the content to the illustrated range.

In order to achieve the above-mentioned object, according to a certain aspect of the present invention, the pipe joint 10 includes a cylindrical member 20 on one side and a cylindrical member 22 on the other side. The other cylindrical member 22 is connected to the one cylindrical member 20 . The cylindrical member 20 has one opening space forming section 40 , one opposing surface forming section 42 , and a connecting section 44 . On the other hand, the opening space forming section 40 forms an opening and a space. The one facing surface forming section 42 is continuous with the one opening space forming section 40 . One opposing surface forming portion 42 forms a surface that faces the other cylindrical member 22 when the other cylindrical member 22 is connected to the one cylindrical member 20 . The connecting portion 44 is arranged on the outer periphery of at least one of the one opening space forming portion 40 and the one opposing surface forming portion 42 . The connecting portion 44 is connected to the other cylindrical member 22 when the one opposing surface forming portion 42 enters the inside of the other cylindrical member 22 . The other cylindrical member 22 has the other opening space forming part 60 , the other opposing surface forming part 62 , and the entrance space forming part 64 . On the other hand, the opening space forming section 60 forms an opening and a space. The other opposing surface forming part 62 is continuous with the other opening space forming part 60. The other opposing surface forming portion 62 forms a surface that faces the one cylindrical member 20 when the other cylindrical member 22 is connected to the one cylindrical member 20 . The entrance space forming portion 64 is continuous with the other opposing surface forming portion 62 . The entrance space forming portion 64 forms an entrance and a space for the one facing surface forming portion 42 . The pipe fitting 10 further includes an annular holding body 24 and a seal portion 26. The holding body 24 is accommodated in the space formed by the entrance space forming part 64. The seal portion 26 is accommodated together with the holder 24 in the space formed by the entrance space forming portion 64 . The seal portion 26 is held on the outer periphery of the holder 24 so as to face a surface formed by the opposing surface forming portion 42 on one side and a surface formed by the opposing surface forming portion 62 on the other side in the space formed by the entrance space forming portion 64. Ru. The seal portion 26 seals the outer periphery of the holding body 24.

One opposing surface forming portion 42 forms a surface that faces the other cylindrical member 22 when the other cylindrical member 22 is connected to the one cylindrical member 20 . As a result, when the distal end portion of the tube 200 passing through the opening and space formed by the opening space forming section 40 is expanded to face the opposing surface forming section 42, the tube 200 will not come out from the cylindrical member 20. . Such widening of the tube 200 can be performed before the tube 200 is installed anywhere. The other opposing surface forming portion 62 forms a surface that faces the one cylindrical member 20 when the other cylindrical member 22 is connected to the one cylindrical member 20 . As a result, when the distal end portion of the tube 202 that passes through the opening and space formed by the other opening space forming section 60 is expanded to face the other opposing surface forming section 62, the tube 202 will not come out from the other cylindrical member 22. . Such widening of the tube 202 can be performed before the tube 202 is installed anywhere. With the seal part 26 and the holder 24 accommodated in the space formed by the entrance space forming part 64, the tube 200 cannot be pulled out, and the connecting part 44 of the cylindrical member 20 is in the other position, where the tube 202 cannot be pulled out. It is connected to the cylindrical member 22. At this time, the one facing surface forming portion 42 enters the inside of the other cylindrical member 22 . Thereby, the other cylindrical member 22 is connected to the one cylindrical member 20. As a result, the tube 200 that cannot be removed from the one cylindrical member 20 and the tube 202 that cannot be removed from the other cylindrical member 22 are connected. Since the pipes 200, 202 can be connected in this manner, less work to connect the pipes 200, 202 must be performed at the location where the pipes 200, 202 are installed. Further, when the seal portion 26 is accommodated in the space formed by the entrance space forming portion 64, it faces the surface formed by the opposing surface forming portion 42 on one side and the surface formed by the opposing surface forming portion 62 on the other side. As a result, the seal portion 26 seals between the distal end portion of the tube 200 that has been expanded so as to face the one facing surface forming portion 42 and the outer periphery of the holder 24 . On the other hand, the seal portion 26 also seals between the distal end portion of the tube 202 expanded to face the opposing surface forming portion 62 and the outer periphery of the holder 24 . As a result, the area to be sealed at the connection point between the tubes 200, 202 can be contained within the flared tip portions of the tubes 200, 202. Since the area to be sealed is housed there, the amount of material that is highly resistant to corrosion against the fluid flowing inside can be reduced.

Further, it is preferable that the seal portion 26 described above includes an annular sealing material 160 on one side and an annular sealing material 162 on the other side. In this case, it is desirable that the holding body 24 has one holding part 180 and the other holding part 182. On the other hand, the holding part 180 holds the one sealing material 160 so that the one sealing material 160 faces the one opposing surface forming part 42 when the holding body 24 and the sealing part 26 are accommodated in the space formed by the entrance space forming part 64. Hold. The other holding part 182 holds the other sealing material 162 so that the other sealing material 162 faces the other opposing surface forming part 62 when the holding body 24 and the sealing part 26 are accommodated in the space formed by the entrance space forming part 64. Hold.

The one-side holding portion 180 holds the one-side sealing material 160 so as to face the one-side opposing surface forming portion 42 . The other holding portion 182 holds the other sealing material 162 so as to face the other opposing surface forming portion 62 . As a result, a seal is established between the distal end portion of the tube 200 that has been widened to face the one-sided opposing surface forming portion 42 and the one-sided holding portion 180 as described below. That is, it is compressed in a direction along the central axis 220 of one cylindrical member 20 and the central axis 222 of the other cylindrical member 22, thereby sealing. The space between the distal end portion of the tube 202 expanded to face the other opposing surface forming portion 62 and the other holding portion 182 is similarly sealed. Since it is sealed in this way, if the compression, that is, the penetration of the opposing surface forming portion 42 into the interior of the other cylindrical member 22 is insufficient, the pipes 200, 202 connected to the pipe fitting 10 according to the present invention may be damaged. When pressurized fluid flows inside, there is a high possibility that the fluid will leak from the pipe fitting 10 according to the present invention. As a result, a connection failure can be detected simply by flowing pressurized fluid.

Alternatively, it is desirable that the connection portion 44 described above be formed with a male thread. In this case, it is desirable that the entrance space forming part 64 has a female threaded part 82. The female threaded portion 82 is formed with a female thread that can engage with the male thread formed on the connecting portion 44 . In this case, it is desirable that the holder 24 further include a holder male threaded portion 184. The holder male threaded portion 184 is arranged between the one holder 180 and the other holder 182. The holder male threaded portion 184 is formed with a male thread that can engage and pass through the female threaded portion 82 .

When the holder 24 has the holder male threaded part 184, the holder 24 accommodated in the other cylindrical member 22 is more likely to fall out from inside the other cylindrical member 22 than when the holder 24 does not have this. sex becomes lower. When this possibility becomes lower, the possibility that it becomes necessary to pick up the fallen holder 24 and accommodate it inside the other cylindrical member 22 also becomes lower.

Further, it is desirable that the above-mentioned holder 24 is formed with an annular dovetail groove. In this case, it is desirable that at least a portion of the seal portion 26 is accommodated in the annular dovetail groove. When an annular dovetail groove is formed in the holder 24 and at least a portion of the seal portion 26 is accommodated in the dovetail groove, the seal portion 26 is accommodated in a groove having a rectangular cross-sectional shape. is less likely to be no longer held by the holder 24.

Moreover, it is desirable that the pipe joint 10 described above further includes a disconnection prevention part 28. The connection release prevention portion 28 prevents the one cylindrical member 20 and the other cylindrical member 22 from being disconnected. This reduces the possibility that fluid flowing from one of the pipes 200, 202 to the other may leak from the pipe fitting 10 due to an accidental event.

Further, it is desirable that the above-mentioned connecting portion 44 be formed with a right-handed male thread. In this case, it is desirable that the entrance space forming part 64 has a female threaded part 82. The female threaded portion 82 is formed with a female thread that can engage with the male thread formed on the connecting portion 44 . In this case, it is desirable that the one cylindrical member 20 further has a recess 46 . The recessed portion 46 is continuous with the connecting portion 44 so as to be arranged in the direction in which the opening formed by the opening space forming portion 40 is arranged when viewed from the position of the connecting portion 44 . In this case, it is desirable that the entrance space forming section 64 has a fixed space forming section 84 in addition to the female thread section 82 . The fixed space forming portion 84 is disposed on the opposite side from the other facing surface forming portion 62 when viewed from the position of the female thread portion 82 . The fixed space forming portion 84 is continuous with the female screw portion 82 . The fixed space forming portion 84 forms a space having a width larger than the root diameter of the female thread formed in the female thread portion 82 . In this case, it is desirable that the disconnection prevention part 28 includes a spring 102 accommodated in the recess 46, a shaft member 104, and an inner peripheral protruding ring 106. One end of the shaft member 104 is accommodated in the recess 46 so as to be placed on the spring 102. The other end of the shaft member 104 protrudes from the recess 46 . The inner peripheral protruding ring 106 is accommodated in the space formed by the fixed space forming part 84. The inner peripheral protruding ring 106 is fixed to the fixed space forming part 84. A protrusion 122 is formed on the inner peripheral surface of the inner protrusion ring 106. In this case, it is desirable that the protruding portion 122 formed on the inner protruding ring 106 has an opposing portion 140, an inner protruding slope 142, and an inner protruding side surface 144. The opposing portion 140 is arranged to face the female threaded portion 82 . The inner circumferential protruding slope 142 is arranged on the side surface in the clockwise direction when the opposing portion 140 is arranged in the front. The inner circumferential protruding side surface 144 is placed on the side surface in the counterclockwise direction when the facing portion 140 is placed in front. In this case, it is desirable that the inclination of the inner protruding slope 142 with respect to the protruding tip direction is greater than the inclination of the inner circumferential protruding side surface 144 with respect to the protruding tip direction. The protrusion tip direction is a direction from the center of the inner protrusion ring 106 toward the tip 146 of the protrusion 122 formed on the inner protrusion ring 106 .

The recessed portion 46 is continuous with the connecting portion 44 so as to be arranged in the direction in which the opening formed by the opening space forming portion 40 is arranged when viewed from the position of the connecting portion 44 . The fixed space forming portion 84 is continuous with the female screw portion 82 . The inner peripheral protruding ring 106 is fixed to the fixed space forming portion 84. As a result, when the right-handed male thread formed in the connecting portion 44 is screwed into the female thread formed in the female threaded portion 82, the shaft member 104 whose other end protrudes from the recessed portion 46 is inserted into the inner peripheral protruding ring 106. will enter. In the protruding portion 122 formed on the inner protruding ring 106, the inclination of the inner protruding slope 142 with respect to the protruding tip direction is greater than the inclination of the inner circumferential protruding side surface 144 with respect to the protruding tip direction. As a result, it is more difficult for the other cylindrical member 22 and, by extension, the inner protruding ring 106, to rotate in the counterclockwise direction when the facing portion 140 is placed in front of the other than in the clockwise direction. This is because the shaft member 104 can easily engage with the inner circumferential protruding side surface 144 of the protruding portion 122. Since it is difficult for the inner protruding ring 106 to rotate in the counterclockwise direction, it is also difficult for the male thread, which is screwed into the female thread, to loosen. Moreover, it becomes difficult for the above-mentioned male screw to loosen so that the shaft member 104 can overcome the plurality of protrusions 122. When this becomes difficult, the movement of the one facing surface forming part 42 trying to come out from the inside of the other cylindrical member 22 can be determined by dividing one pitch of the above-mentioned male thread and female thread by the number of protrusions 122. can be kept below the amount required.

Alternatively, it is desirable that the one cylindrical member 20 described above further includes a continuous portion 48 and a different color surface forming portion 50. The continuous portion 48 continues to the connecting portion 44 together with the recessed portion 46 so as to be disposed adjacent to the opening formed by the opening space forming portion 40 when viewed from the position of the connecting portion 44 . The different color surface forming part 50 is continuous with the recessed part 46 and the continuous part 48 so as to be arranged in the direction in which the opening formed by the one opening space forming part 40 is arranged when viewed from the position of the connecting part 44 . The different color surface forming portion 50 forms a surface of a different color from that of the continuous portion 48 .

When the different color surface forming portion 50 is connected to the recess 46 and the continuous portion 48, the continuous portion 48 enters the entrance space forming portion 64, and the entrance space forming portion 64 covers the continuous portion 48. Based on whether or not the surface formed by the different color surface forming part 50 is exposed and the continuous part 48 is covered, it is determined whether the male thread formed in the connecting part 44 is sufficiently screwed into the female thread formed in the female thread part 82. You can easily understand what is going on.

According to the present invention, it is possible to reduce the work that must be carried out at the place where the pipe is installed among the work to be connected to the pipe, and to reduce the amount of material that is required to have excellent corrosion resistance against the fluid flowing inside the pipe. You can do less.

1 is an external view of a pipe joint according to an embodiment of the present invention. FIG. 2 is an external view of a one-sided cylindrical member according to an embodiment of the present invention. FIG. 3 is an external view of the other cylindrical member according to an embodiment of the present invention. FIG. 3 is a diagram showing a coil spring and a shaft member housed in a recess according to an embodiment of the present invention. FIG. 2 is a front view of an inner peripheral protruding ring according to an embodiment of the present invention. FIG. 2 is a side view of an inner peripheral protruding ring according to an embodiment of the present invention. It is a figure when the protrusion part of the inner periphery protrusion ring concerning one embodiment of this invention is seen from the surface which opposes a female thread part. FIG. 2 is an external view of a holding body and a seal portion according to an embodiment of the present invention. FIG. 3 is a sectional view showing a situation where an enlarged diameter portion is formed at the distal end portion of one tube that passes through one opening space forming portion of one cylindrical member in an embodiment of the present invention. It is a figure which shows the situation where the diameter enlarged part was formed in the front-end|tip part of the other tube which penetrated the other opening space formation part of the other cylindrical member in one embodiment of this invention.

Embodiments of the present invention will be described below based on the drawings. In the following description, the same parts are given the same reference numerals. Their names and functions are the same. Therefore, detailed description thereof will not be repeated.

[Pipe joint configuration]
FIG. 1 is an external view of a pipe joint 10 according to this embodiment. In FIG. 1, two pipes 200 and 202 are connected to the pipe joint 10 according to this embodiment. In FIG. 1, the illustrated object is shown partially cut away. Hereinafter, the configuration of the pipe joint 10 according to this embodiment will be explained based on FIG. 1.

The pipe joint 10 according to this embodiment is used to connect two pipes 200 and 202 to each other. The pipe joint 10 according to this embodiment includes one cylindrical member 20, the other cylindrical member 22, an annular holder 24, a seal portion 26, and a disconnection prevention portion 28.

On the other hand, the cylindrical member 20 is a cylindrical member. One tube 200 of the two tubes 200 and 202 passes through one cylindrical member 20.

On the other hand, the cylindrical member 22 is also a cylindrical member. The other tube 202 of the two tubes 200, 202 passes through the other cylindrical member 22.

The holder 24 is housed inside the other cylindrical member 22 together with the seal portion 26 . The seal portion 26 seals the outer periphery of the holding body 24.

The connection release prevention portion 28 prevents the one cylindrical member 20 and the other cylindrical member 22 from being disconnected.

FIG. 2 is an external view of the one-sided cylindrical member 20 according to this embodiment. In FIG. 2, some of the objects shown are cut away. Hereinafter, the configuration of the one-sided cylindrical member 20 according to this embodiment will be explained based on FIG. 2.

One cylindrical member 20 according to this embodiment is a member made of carbon steel. Of course, in the present invention, the material of the one cylindrical member 20 is not particularly limited. In the case of this embodiment, the one cylindrical member 20 includes one opening space forming part 40, one opposing surface forming part 42, a connecting part 44, a recessed part 46, a continuous part 48, a different color surface forming part 50, On the other hand, it has a plane pair forming part 52.

On the other hand, the opening space forming part 40 forms an opening into which the distal end portion of one tube 200 enters, and a columnar space through which the distal end portion passes. In FIG. 2, the opening is arranged at the end of the one-opening space forming section 40 opposite to the one where the one-side opposing surface forming section 42 is located. In this embodiment, the opening is circular. In the case of this embodiment, the columnar space formed by the one-opening space forming section 40 is cylindrical. The columnar spaces are connected to the opening.

The one facing surface forming section 42 is continuous with the one opening space forming section 40 . One opposing surface forming portion 42 forms a surface that faces the other cylindrical member 22 when the other cylindrical member 22 is connected to the one cylindrical member 20 . In the case of this embodiment, the one-side opposing surface forming section 42 forms a space that narrows as it approaches the one-side opening space forming section 40 and an opening that is different from the opening formed by the one-side opening space forming section 40 . In FIG. 2, the opening is arranged at the end of the one opposing surface forming part 42 opposite to the one where the one opening space forming part 40 is located. In this embodiment, the opening is circular. A surface of the opposing surface forming portion 42 that forms a space that narrows as it approaches the one opening space forming portion 40 is a curved surface.

The connecting portion 44 is arranged from the outer periphery of the one opening space forming portion 40 to the outer periphery of the one opposing surface forming portion 42 . The connecting portion 44 connects to the other cylindrical member 22 when the other cylindrical member 22 is connected to the other cylindrical member 20 and when the one opposing surface forming portion 42 enters the inside of the other cylindrical member 22. be done. In the case of this embodiment, the connecting portion 44 is formed with a right-handed male thread.

The recessed portion 46 is continuous with the connecting portion 44 . In the case of this embodiment, the recess 46 is arranged in the direction in which the opening formed by the opening space forming part 40 is arranged when viewed from the position of the connecting part 44. In the case of this embodiment, a female thread is formed on the inner peripheral surface of the recess 46 .

The continuous portion 48 continues to the connecting portion 44 together with the recessed portion 46 . The continuous portion 48 is arranged in the direction in which the opening formed by the opening space forming portion 40 is arranged when viewed from the position of the connecting portion 44 . Continuous portion 48 is arranged adjacent to connecting portion 44 . In this embodiment, the recess 46 is surrounded by a continuous portion 48 .

The different color surface forming portion 50 is continuous with the recessed portion 46 and the continuous portion 48 . In the case of this embodiment, the different color surface forming section 50 is arranged in the direction in which the opening formed by the one opening space forming section 40 is arranged when viewed from the position of the connecting section 44 . In the case of this embodiment, the different color surface forming section 50 forms a cylindrical surface. In the case of this embodiment, the different color surface forming portion 50 forms a surface of a different color from that of the continuous portion 48 .

On the other hand, the plane pair forming section 52 is arranged at a position that is in the direction in which the opening formed by the one opening space forming section 40 is arranged when viewed from the position of the different color surface forming section 50 and hence the connecting section 44 . In the case of this embodiment, the one plane pair forming part 52 is arranged on the outer periphery of the one opening space forming part 40 . In the case of this embodiment, the one plane pair forming portion 52 forms a pair of planes that extend along each other. These planes are arranged so as to sandwich one opening space forming part 40 therebetween. In the case of this embodiment, a plurality of pairs of planes are formed.

In addition, in this embodiment, the distance described next is called the other material reach distance 250. The other member reaching distance 250 is a distance in the direction along the central axis 220 of the one cylindrical member 20 . The other material reach distance 250 is defined as the distance from the male screw formed in the connecting part 44 to the one opening space forming part of the continuous part 48 from the end opposite to the direction in which the opening formed by the one opening space forming part 40 is arranged. This is the distance to the end in the direction in which the opening formed by the section 40 is arranged.

FIG. 3 is an external view of the other cylindrical member 22 according to this embodiment. In FIG. 3, some of the objects shown are cut away. Hereinafter, the configuration of the other cylindrical member 22 according to this embodiment will be explained based on FIG. 3.

The other cylindrical member 22 according to this embodiment is a member made of carbon steel. Of course, in the present invention, the material of the other cylindrical member 22 is not particularly limited. In the case of this embodiment, the other cylindrical member 22 has the other opening space forming part 60, the other opposing surface forming part 62, the entrance space forming part 64, and the other flat pair forming part 66.

The other opening space forming portion 60 forms an opening into which the tip portion of the other tube 202 enters and a columnar space through which the tip portion passes. In FIG. 3, the opening is arranged at the end of the other opening space forming section 60 opposite to the side where the other opposing surface forming section 62 is located. In this embodiment, the opening is circular. In the case of this embodiment, the columnar space formed by the other opening space forming section 60 is cylindrical. The columnar spaces are connected to the opening.

The other opposing surface forming part 62 is continuous with the other opening space forming part 60. The other opposing surface forming portion 62 forms a surface that faces the one cylindrical member 20 when the other cylindrical member 22 is connected to the one cylindrical member 20 . In the case of this embodiment, the other opposing surface forming part 62 forms a space that narrows as it approaches the other opening space forming part 60. In the case of this embodiment, the surface forming the space is a curved surface.

The entrance space forming portion 64 is continuous with the other opposing surface forming portion 62 . The entrance space forming portion 64 forms an entrance and a space for the one facing surface forming portion 42 . In the case of this embodiment, the entrance space forming section 64 includes an accommodation space forming section 80, a female thread section 82, and a fixed space forming section 84.

The accommodation space forming part 80 forms a columnar space. In this embodiment, the space is cylindrical. The above-described holding body 24 and seal portion 26 are housed in this space.

The female screw portion 82 is continuous with the accommodation space forming portion 80 . The female thread portion 82 is formed with a right-handed female thread. The internal threads can engage external threads formed in the connecting portion 44.

The fixed space forming portion 84 is continuous with the female screw portion 82 . Therefore, the fixed space forming part 84 is arranged on the opposite side from the other facing surface forming part 62 when viewed from the position of the female thread part 82. The fixed space forming portion 84 forms a columnar space. In the case of this embodiment, the columnar space formed by the fixed space forming part 84 is cylindrical. A fixing screw hole 90 is formed in the fixing space forming portion 84 . This fixing screw hole 90 has a female thread formed therein. In the case of this embodiment, the inner diameter 230 of the inner peripheral surface of the fixed space forming part 84 is larger than the root diameter 232 of the female thread part 82.

In the case of this embodiment, the other plane pair forming part 66 is formed on the outer periphery of the other opening space forming part 60. In the case of this embodiment, the other plane pair forming portion 66 forms a pair of planes that extend along each other. These planes are arranged so that the other plane pair forming part 66 is sandwiched therebetween. In the case of this embodiment, the other plane pair forming section 66 forms pairs of a plurality of planes.

Further, in this embodiment, the distance described next is referred to as the one-side member connection distance 252. One member connection distance 252 is a distance in the direction along the central axis 222 of the other cylindrical member 22. One member connection distance 252 is defined as the arrangement of the opening formed by the other opening space forming part 60 in the fixed space forming part 84 from the end of the female screw part 82 in the direction in which the opening formed by the other opening space forming part 60 is arranged. This is the distance to the end in the opposite direction. In the case of this embodiment, the other member reach distance 250 is less than or equal to the one member connection distance 252.

FIG. 4 is a diagram showing the coil spring 102 and shaft member 104 accommodated in the recess 46 according to this embodiment. FIG. 5 is a front view of the inner peripheral protruding ring 106 according to this embodiment. FIG. 6 is a side view of the inner peripheral protruding ring 106 according to this embodiment. FIG. 7 is a diagram of the protruding portion 122 of the inner protruding ring 106 according to the present embodiment, viewed from the side where the surface of the inner protruding ring 106 facing the female threaded portion 82 is arranged. The configuration of the disconnection prevention unit 28 according to this embodiment will be explained based on FIGS. 4 to 7.

The disconnection preventing portion 28 according to this embodiment includes a slotted screw 100, a coil spring 102, a shaft member 104, an inner peripheral protruding ring 106, and a fixing screw 108. Needless to say, the number of fixing screws 108 (three in this embodiment) is not particularly limited in the present invention. The number of slotted screws 100, the number of coil springs 102, and the number of shaft members 104 are also the same.

The slotted screw 100 is accommodated in the recess 46 . As described above, the inner peripheral surface of the recess 46 is formed with a female thread. A slotted screw 100 is screwed into the internal thread. A cavity is formed inside the slotted screw 100. An opening is formed at one end of the cavity. The opening is located at one end of slotted screw 100. A hole is formed at the other end of the cavity. The hole communicates with the groove described next. The groove is formed on the other end of the slotted screw 100.

Coil spring 102 is housed within the cavity of slotted screw 100. As a result, the coil spring 102 is indirectly accommodated in the recess 46.

The shaft member 104 is also housed within the cavity of the slotted screw 100. Within the cavity of the slotted screw 100, one end of the shaft member 104 rests on the coil spring 102. The other end of the shaft member 104 protrudes from the slotted screw 100 through a hole formed at the other end of the cavity. As a result, one end of the shaft member 104 is accommodated in the recess 46 so as to be placed on the coil spring 102. The other end of the shaft member 104 will protrude from the recess 46.

The inner peripheral protruding ring 106 according to this embodiment is made of polyacetal. Of course, in the present invention, the material of the inner peripheral protruding ring 106 is not particularly limited. The inner peripheral protruding ring 106 is accommodated in the space formed by the fixed space forming part 84. The inner peripheral protrusion ring 106 according to this embodiment has an annular base 120, a large number of protrusions 122, a fitting groove forming part 124, and a tapered part 126. In the case of this embodiment, the annular base 120, the multiple protrusions 122, the fitting groove forming portion 124, and the tapered portion 126 are integrated. The annular base portion 120 is in contact with the inner peripheral surface of the fixed space forming portion 84 . The protrusions 122 protrude from the inner peripheral surface of the annular base 120, respectively. The fitting groove forming portion 124 is arranged on the outer peripheral surface of the annular base 120. The fitting groove forming portion 124 forms a groove. In the case of this embodiment, this groove is formed halfway along the outer circumferential surface of the annular base 120 from the end of the outer circumferential surface of the annular base 120 that does not face the female threaded portion 82 . Needless to say, the number of fitting groove forming portions 124 (three in this embodiment) is not particularly limited in the present invention. The tapered portion 126 is arranged on the side of the inner peripheral protruding ring 106 that does not face the female threaded portion 82 . The tapered portion 126 is arranged to extend from the annular base 120 to the tip of the protruding portion 122 . The tapered portion 126 becomes narrower as it approaches the side of the inner peripheral protruding ring 106 that faces the female threaded portion 82 .

In the case of this embodiment, the protrusion 122 has an opposing portion 140, an inner protruding slope 142, and an inner protruding side surface 144. Of course, in the present invention, the configuration of the protrusion 122 is not limited to this. The opposing portion 140 is arranged to face the female threaded portion 82 . As is clear from FIG. 7, the inner circumferential protruding slope 142 is arranged on the side surface in the clockwise direction when the opposing portion 140 of the inner circumferential protruding ring 106 is disposed in the front. The inner circumferential protruding side surface 144 is disposed on the side surface in the counterclockwise direction when the opposing portion 140 of the inner circumferential protruding ring 106 is disposed in the front. As is clear from FIG. 7, in the case of this embodiment, the inclination of the inner circumferential protruding side surface 142 with respect to the protruding tip direction is larger than the inclination of the inner circumferential protruding side surface 144 with respect to the protruding tip direction. The protrusion tip direction is the direction from the center of the inner protrusion ring 106 toward the tip 146 of the protrusion 122 formed on the inner protrusion ring 106, that is, the direction shown by the dashed line in FIG.

In the case of the present embodiment, the diameter of the virtual circle inscribed with the tips 146 of the many protrusions 122 of the inner circumferential protrusion ring 106 is larger than the diameter of the different-color surface forming part 50.

The fixing screws 108 are screwed into the fixing screw holes 90 of the fixing space forming part 84, respectively. The inner peripheral protruding ring 106 is housed in the fixed space forming portion 84 in advance. The groove formed by the fitting groove forming portion 124 of the inner peripheral protrusion ring 106 is arranged so as to face the fixing screw hole 90 thereof. In this state, when the fixing screws 108 pass through the fixing screw holes 90, the tips of the fixing screws 108 enter the grooves formed by the fitting groove forming portions 124. Thereby, the inner peripheral protruding ring 106 is fixed to the fixed space forming part 84.

FIG. 8 is an external view of the holder 24 and the seal portion 26 according to this embodiment. In FIG. 8, a portion of what is shown is cut away. Hereinafter, the configurations of the holding body 24 and the seal portion 26 according to this embodiment will be explained based on FIG. 8.

The holder 24 according to this embodiment is a member made of bronze. Of course, the material of the holder 24 is not particularly limited in the present invention. The holder 24 according to this embodiment includes a holder 180 on one side, a holder 182 on the other side, and a male holder 184.

As shown in FIG. 8, the one-hand holding portion 180 according to this embodiment forms an annular dovetail groove. Further, as shown in FIG. 8, the one-side holding portion 180 according to the present embodiment is formed by adding curved surfaces that spread across the dovetail groove to the dovetail groove. This curved surface follows the surface of one opposing surface forming part 42 when the seal part 26 and the holder 24 are accommodated in the columnar space formed by the accommodation space forming part 80.

As shown in FIG. 8, the other holding portion 182 according to this embodiment forms an annular dovetail groove. Further, as shown in FIG. 8, the other holding portion 182 according to the present embodiment is formed by adding a curved surface that spreads across the dovetail groove to the dovetail groove. This curved surface follows the surface of the other opposing surface forming part 62 when the seal part 26 and the holder 24 are accommodated in the columnar space formed by the accommodation space forming part 80.

The holder male threaded portion 184 is arranged between the one holder 180 and the other holder 182. The holder male threaded portion 184 is formed with a male thread. The male thread can engage and pass through a female thread formed in the female threaded portion 82.

The seal portion 26 according to this embodiment includes an annular sealing material 160 on one side and an annular sealing material 162 on the other side. The one sealing material 160 and the other sealing material 162 are well-known O-rings. Of course, one of the sealing materials 160 and the other sealing material 162 may be a deformed rubber ring or other material having the same function as an O-ring.

The sealing material 160 is accommodated in an annular dovetail groove formed by the holding portion 180 . As a result, the one-side holding section 180 is configured to seal one side so that the one-side sealing material 160 faces the one-side facing surface forming section 42 when the holding body 24 and the sealing section 26 are accommodated in the columnar space formed by the accommodation space forming section 80. The material 160 will be held.

The other sealing material 162 is accommodated in an annular dovetail groove formed by the other holding portion 182 . As a result, the other holding part 182 can seal the other side so that the other seal material 162 faces the other opposing surface forming part 62 when the holding body 24 and the seal part 26 are accommodated in the columnar space formed by the accommodation space forming part 80. The material 162 will be held.

[How to connect pipe fittings]
The method of connecting the pipe joint 10 according to this embodiment is as follows. First, the operator causes one tube 200 to penetrate one opening space forming portion 40 of one cylindrical member 20 . Next, the operator forms the enlarged diameter portion 212 at the distal end portion of the one tube 200 that passes through the one opening space forming portion 40 using a well-known method. FIG. 9 is a sectional view showing a situation in which an enlarged diameter portion 212 is formed at the distal end portion of one tube 200 that penetrates one opening space forming portion 40 of one cylindrical member 20 in this embodiment. Next, the operator passes the other tube 202 through the other opening space forming portion 60 of the other cylindrical member 22 . Next, the operator forms the enlarged diameter portion 214 at the distal end portion of the other tube 202 that passes through the other opening space forming portion 60 using a well-known method. FIG. 10 is a diagram showing a situation in which an enlarged diameter portion 214 is formed at the distal end portion of the other tube 202 that passes through the other open space forming portion 60 of the other cylindrical member 22 in this embodiment.

Next, the operator brings the expanded diameter portion 214 of the other tube 202 into contact with the other opposing surface forming portion 62 of the other cylindrical member 22 . Next, the operator screws the male thread formed in the holder male threaded portion 184 of the holder 24 into the female thread formed in the female threaded portion 82 of the other cylindrical member 22 . At this time, the one-sided sealing material 160 is accommodated in advance in the dovetail groove formed by the one-sided holding part 180 of the holding body 24. The other sealing material 162 is accommodated in advance in the dovetail groove formed by the other holding part 182. As a result, the holder 24 and the seal portion 26 are accommodated in the columnar space formed by the accommodation space forming portion 80 of the other cylindrical member 22. At this time, the seal portion 26 is arranged on the outer periphery of the holder 24 so as to face a surface formed by one opposing surface forming portion 42 and a surface formed by the other opposing surface forming portion 62 in the columnar space formed by the accommodation space forming portion 80. It will be held at

Next, the operator brings the enlarged diameter portion 212 of the one tube 200 into contact with the one opposing surface forming portion 42 of the one cylindrical member 20 . Next, the operator screws the male thread formed in the connection part 44 of the one cylindrical member 20 into the female thread formed in the female thread part 82 of the other cylindrical member 22. Accordingly, the shaft member 104 accommodated in the recess 46 gradually approaches the inner peripheral protruding ring 106. Next, when the shaft member 104 contacts the inner protruding ring 106, the shaft member 104 contacts the tapered portion 126 of the inner protruding ring 106. In this state, when the male thread of the connecting part 44 of one cylindrical member 20 is screwed into the female thread of the female thread part 82 of the other cylindrical member 22, the shaft member 104 in contact with the tapered part 126 slides on the surface of the tapered part 126. . Accordingly, the shaft member 104 is gradually pushed into the recess 46. In this state, when the male thread of the connecting portion 44 of the one cylindrical member 20 is further screwed into the female thread of the female thread portion 82 of the other cylindrical member 22, the shaft member 104 enters the inner periphery of the inner periphery protruding ring 106. In this state, when the male thread of the connecting part 44 of the one cylindrical member 20 is further screwed into the female thread of the female thread part 82 of the other cylindrical member 22, the shaft member 104 slides on the surface of the inner peripheral protruding slope 142 of the protruding part 122. The tip 146 of the protrusion 122 is climbed over. While sliding on the surface of the inner peripheral protruding slope 142, the shaft member 104 is gradually pushed into the recess 46. When the shaft member 104 passes over the tip 146 of the protruding portion 122, the shaft member 104 is no longer pushed in, so the coil spring 102 pushes the shaft member 104 out of the recess 46. The extruded shaft member 104 slides on the surface of the inner peripheral protruding slope 142 of the next protruding portion 122. When the screw is sufficiently screwed in, the fixed space forming portion 84 of the other cylindrical member 22 covers the recess 46 and the continuous portion 48 of the one cylindrical member 20. Thereby, the connection between the pipe joint 10 and the two pipes 200 and 202 according to this embodiment is completed.

To disconnect the pipe joint 10 according to this embodiment and the two pipes 200, 202, the fixing screws 108 passing through the fixing screw holes 90 can be removed.

[Description of effects of this embodiment]
As described above, according to the pipe joint 10 according to the present embodiment, the location where one pipe 200 and the other pipe 202 are installed during the work for connecting the one pipe 200 and the other pipe 202 This reduces the amount of work that must be carried out. Furthermore, according to the pipe fitting 10 according to the present embodiment, the required amount of a material having excellent corrosion resistance against the fluid flowing inside the pipe fitting 10 can be reduced.

Further, in the case of the pipe joint 10 according to the present embodiment, there is no space between the distal end portion of one pipe 200 and the one holding portion 180, and between the distal end portion of the other pipe 202 and the other holding portion 182. It is sealed by what is stated next. That is, they are compressed in a direction along the central axis 220 of one cylindrical member 20 and the central axis 222 of the other cylindrical member 22, thereby being sealed. Because of the sealing, if the compression is insufficient, when pressurized fluid flows into the interior of one tube 200 and the other tube 202, the fluid will flow out of the fitting 10 according to this embodiment. The possibility of leakage increases. As a result, a connection failure can be detected simply by flowing pressurized fluid.

Moreover, in the case of the pipe joint 10 according to the present embodiment, the one-sided sealing material 160 is accommodated in the dovetail groove formed by the one-sided holding part 180. The other sealing material 162 is accommodated in the dovetail groove formed by the other holding portion 182 . As a result, there is a possibility that at least one of the one sealing material 160 and the other sealing material 162 will not be held by the holder 24, compared to the case where the one sealing material 160 or the other sealing material 162 is accommodated in a groove with a rectangular cross-sectional shape. becomes lower.

Further, in the case of the pipe joint 10 according to the present embodiment, the male thread formed in the connecting portion 44 of the one cylindrical member 20 is screwed into the female thread formed in the female thread portion 82 of the other cylindrical member 22. Even if the male screw screwed into the female screw tries to loosen, it will be restrained. This is because the shaft member 104 gets caught on the inner circumferential protruding side surface 144 of the protruding portion 122 . Since the loosening of the screws is suppressed, the movement of the one opposing surface forming part 42 to come out from the inside of the other cylindrical member 22 can be prevented by dividing one pitch of the male thread and the female thread described above by the number of protrusions 122. be kept below the specified amount.

In the case of the pipe joint 10 according to the present embodiment, the male thread formed in the connecting part 44 is sufficiently screwed into the female thread part 82 of the other cylindrical member 22 based on whether the surface of the continuous part 48 is covered or not. It is easy to understand whether or not it has been completed.

Further, in the case of the pipe joint 10 according to the present embodiment, the holder 24 has the holder male threaded portion 184. This reduces the possibility that the holder 24 accommodated in the other cylindrical member 22 will fall out from inside the other cylindrical member 22, compared to the case where the holder 24 does not have the holder male threaded portion 184. When this possibility becomes lower, the possibility that it becomes necessary to pick up the fallen holder 24 and accommodate it inside the other cylindrical member 22 also becomes lower.

[Modified example]
The embodiment disclosed herein is an example in all respects. The scope of the invention is not limited based on the embodiments described above. Of course, various design changes may be made to the embodiments described above without departing from the spirit of the present invention.

For example, the one plane pair forming part 52 and the other plane pair forming part 66 may be in contact with each other. They can be separated from each other. When the one plane pair forming part 52 and the other plane pair forming part 66 are in contact with each other, it is desirable that the distance between the pairs of planes formed by each of them is different. As a result, when an arbitrary tool is applied to one of the plane pair forming part 52 and the other plane pair forming part 66 and an attempt is made to rotate it, the tool is also applied to the other and it also rotates. This is because it is possible to suppress the occurrence of problems such as Alternatively, the one plane pair forming part 52 and the other plane pair forming part 66 may have different shapes. On the other hand, the cylindrical member 20 does not need to have the one plane pair forming part 52. The other cylindrical member 22 does not need to have the other plane pair forming portion 66.

Furthermore, the shape of the surface formed by the different-color surface forming portion 50 is not limited to a cylindrical shape. On the other hand, the cylindrical member 20 does not need to have the different color surface forming portion 50. Moreover, the pipe joint 10 does not need to be provided with the disconnection prevention part 28.

Furthermore, the shape of the columnar space formed by the fixed space forming section 84 is not limited to a columnar shape. In that case, it is desirable that the span of the columnar space formed by the fixed space forming portion 84 be larger than the root diameter 232 of the female thread portion 82 at any location.

Further, the holder 24 does not need to have the holder male threaded portion 184. In that case, the holder 24 may have a portion forming a columnar outer circumferential surface instead of the holder male threaded portion 184. Alternatively, the configuration of the entrance space forming section 64 is not limited to that described above. For example, the female threaded portion may also serve as the accommodation space forming portion. In this case, it is desirable that the holder 24 has a holder male threaded portion 184.

Furthermore, the specific forms of the holding body 24 and the seal portion 26 are not particularly limited. The seal portion 26 is made of one annular sealing material held on the outer periphery of the holder 24 so as to face each other from the surface formed by the opposing surface forming portion 42 on one side to the surface formed by the opposing surface forming portion 62 on the other side. It may be something. In that case, one annular dovetail groove may be formed in the holding body 24, and at least a portion of the seal portion 26 may be accommodated in the dovetail groove. Alternatively, three or more annular dovetail grooves may be formed in the holding body 24, and different portions of the seal portion 26 may be accommodated in each of the annular dovetail grooves.

Further, the configuration of the connecting portion 44 is not limited to that described above. For example, the connecting portion 44 may be connected to the other cylindrical member 22 by engaging with any part of the other cylindrical member 22.

10... Pipe joint 20... One cylindrical member 22... The other cylindrical member 24... Holder 26... Seal portion 28... Connection release prevention portion 40... One opening space forming portion 42... One opposing surface forming portion 44... Connecting portion 46... Concave portion 48...continuous portion 50...different color surface forming section 52...one plane pair forming section 60...other opening space forming section 62...other opposing surface forming section 64...entrance space forming section 66...other plane pair forming section 80...housing space Forming part 82...Female thread part 84...Fixing space forming part 90...Fixing screw hole 100...Slotted screw 102...Coil spring 104...Shaft member 106...Inner periphery protruding ring 120...Annular base 122...Protruding part 124...Fitting Groove forming portion 126...Tapered portion 140...Opposing portion 142...Inner periphery protruding slope 144...Inner periphery protruding side surface 146...Tip 160...One sealing material 162...Other sealing material 180...One holder 182...Other holder 184...Holder Male threaded portions 200, 202...Pipe 212, 214...Enlarged diameter portion 220, 222...Central axis 230...Inner diameter 232...Trough diameter 250...Reaching distance to the other material 252...Connecting distance to one material

Claims (7)

On the other hand, a cylindrical member;
A pipe joint comprising the one cylindrical member and the other cylindrical member connected to the one cylindrical member,
The one cylindrical member is
an opening space forming part that forms an opening and a space;
one opposing surface forming portion that is continuous with the one opening space forming portion and forms a surface that faces the other cylindrical member when the other cylindrical member is connected to the one cylindrical member;
Disposed on the outer periphery of at least one of the one opening space forming part and the one opposing surface forming part, and being connected to the other cylindrical member when the one opposing surface forming part enters the inside of the other cylindrical member. It has a connecting part,
The other cylindrical member is
the other opening space forming part forming an opening and a space;
the other opposing surface forming part that is continuous with the other opening space forming part and forms a surface that faces the one cylindrical member when the other cylindrical member is connected to the one cylindrical member;
an entrance space forming part that is continuous with the other facing surface forming part and forms an entrance and a space for the one facing surface forming part;
an annular holder accommodated in a space formed by the entrance space forming section;
A surface formed by the one facing surface forming section and a surface formed by the other facing surface forming section in the space formed by the entrance space forming section, which is accommodated together with the holder in a space formed by the entrance space forming section. A pipe joint further comprising: a seal portion held on the outer periphery of the holder so as to face the holder, and sealing the outer periphery of the holder. The seal portion is
An annular one-sided sealing material;
It has an annular sealing material on the other side,
The holding body is
one holding part that holds the one sealing material so that the one sealing material faces the one opposing surface forming part when the holding body and the sealing part are accommodated in the space formed by the entrance space forming part; ,
the other holding part that holds the other sealing material so that the other sealing material faces the other opposing surface forming part when the holding body and the sealing part are accommodated in the space formed by the entrance space forming part; The pipe joint according to claim 1, characterized in that it has: A male thread is formed in the connection part,
The entrance space forming part has a female threaded part formed with a female thread capable of engaging with a male thread formed in the connecting part,
The holding body further includes a holding body male threaded portion which is disposed between the one holding portion and the other holding portion and is formed with a male thread that can engage and pass through the female threaded portion formed in the female threaded portion. The pipe joint according to claim 2, characterized in that: An annular dovetail groove is formed in the holding body,
The pipe joint according to claim 1, wherein at least a portion of the seal portion is accommodated in the annular dovetail groove. The pipe joint according to claim 1, further comprising a disconnection prevention part that prevents disconnection between the one cylindrical member and the other cylindrical member. A right-handed male thread is formed in the connection part,
The entrance space forming part has a female threaded part formed with a female thread capable of engaging with a male thread formed in the connecting part,
The one-side cylindrical member further has a recessed portion connected to the connecting portion so as to be arranged in a direction in which the opening formed by the one-side opening space forming portion is arranged when viewed from the position of the connecting portion,
The entrance space forming part is
a fixed space that is disposed on the opposite side of the other facing surface forming part when viewed from the position of the female threaded part, continues to the female threaded part, and forms a space that is larger across than the root diameter of the female thread formed in the female threaded part; It has a forming part in addition to the female thread part,
The disconnection prevention part is
a spring accommodated in the recess;
a shaft member having one end accommodated in the recess so as to be placed on the spring, and the other end protruding from the recess;
an inner circumferential protrusion ring that is accommodated in a space formed by the fixed space forming part, is fixed to the fixed space forming part, and has a protruding part formed on an inner circumferential surface;
The protrusion formed on the inner circumferential protrusion ring is
a facing portion arranged to face the female threaded portion;
an inner circumferential protruding slope disposed on a side surface in a clockwise direction when the opposing portion is disposed in front;
and an inner circumferential protruding side surface disposed on a counterclockwise side surface when the opposing portion is disposed in front,
The slope of the inner protruding slope with respect to the protrusion tip direction, which is the direction from the center of the inner protrusion ring to the tip of the protrusion formed on the inner protrusion ring, is the inner protrusion side surface with respect to the protrusion tip direction. 6. The pipe joint according to claim 5, wherein the slope is larger than that of the pipe joint. The one cylindrical member is
a continuous portion connected to the connection portion together with the recess so as to be disposed adjacent to the opening formed by the one-opening space forming portion when viewed from the position of the connection portion;
A unique color that is continuous with the recess and the continuous part so as to be arranged in the direction in which the opening formed by the one-opening space forming part is arranged when viewed from the position of the connecting part, and that forms a surface of a different color from the continuous part. The pipe joint according to claim 6, further comprising a surface forming portion.

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