JPH09242950A - Inserting joint for fluid pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fluid leak for a long time by locking a first sealing ring between a fluid pipe fitted on the outside of a pipe supporting cylinder screwed in a joint main body and the joint and by providing a second sealing ring for ensuring sealing performance between a fastening member and the pipe. SOLUTION: A pipe supporting cylinder 20 whose top 23 is opposite to a tapered surface 12 is screwed in a joint main body 10 and a first sealing ring 31 retained by a holding groove 13 is mounted to ensure sealing performance between a fluid pipe 60 fitted on the outside of the pipe supporting cylinder 20 and the joint main body 10. A fastening member 40 is mounted on the pipe 60 and a second sealing ring 32 which is retained in the holding groove 44 of the fastening member 40 to ensure sealing performance between the fastening member 40 and the pipe 60 is mounted. A wedge-like ring 50 is mounted which is pressed into a gap between the inserted base 10b and the pipe 60 when the fastening member is screwed on the body 10, whereby the pipe 60 is pressed on the outer surface of the pipe supporting cylinder 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called pipe joint, and is particularly suitable for connecting a fluid pipe such as a water pipe to be buried in soil, and the connection work can be performed by inserting the fluid pipe. The present invention relates to a plug-in type pipe joint.

[0002]

2. Description of the Related Art A water pipe, which is a fluid pipe, is buried in a wall or in soil unless there are special circumstances.
Since it must be piped everywhere, it must be connected by pipe fittings. In addition, such a fluid pipe such as a water pipe, once buried in the soil,
It is very difficult to check whether the connection state is perfect, that is, whether there is a fluid leak. From the above, it is required that the fluid pipes be connected so that the connecting work is simple and that the liquid-tight and air-tight state can be completely maintained after the connection. Of.

Further, as for this type of fluid pipe, a so-called "lead pipe" has been used in place of a so-called "lead pipe", which is made of synthetic resin as a basic material. The reason is that this type of synthetic resin fluid pipe does not rust even if it is buried in the soil, and has a certain degree of flexibility / flexibility, which facilitates the construction work. Because. Since this type of synthetic resin fluid pipe has greater flexibility than "lead pipes", it can sufficiently follow changes in the soil due to ground subsidence or earthquakes to some extent. Yes, and this is a major reason why it was used in large quantities in place of "lead tubes".

As a means for connecting such a synthetic resin fluid pipe, liquid-tightness and
As a plug-in type pipe joint that maintains an airtight state,
There are typically three types shown in FIGS.

First, in the plug-in type pipe joint shown in FIG. 14, a fluid pipe 60 having a pipe support tube as an independent component inserted at the tip is inserted (inserted) into the base of the joint pipe body. By inserting a wedge-shaped ring into the gap between the fluid pipe 60 and the insertion base of the joint pipe body, and finally fastening the fastening member to the outer periphery of the insertion base of the joint pipe body, The connection of 60 to the joint pipe main body can be easily performed on the basis of the inserting work.

However, in the case of the plug-in type pipe joint of FIG. 14, since the fluid pipe is made of synthetic resin, the portion pressed by the wedge-shaped ring becomes smaller due to the secular change, which is possible. The fluid in the fluid pipe (when tap water is always under pressure) leaks into the soil through the gap. Also, if there is no pressure in the fluid in this fluid pipe (if it is tap water, it will be cut off), this time the water in the soil will flow back into the joint pipe body together with the earth and sand. In some cases, small sand particles may enter around the wedge ring or between the tube support cylinder and the fluid pipe, resulting in a state where liquid tightness and air tightness cannot be maintained. Further, when trying to reconstruct the joint pipe body or the fluid pipe connected thereto, the pipe support cylinder is tightly fitted to the tip of the fluid pipe, and therefore cannot be easily removed. For this reason, the tip of the fluid pipe must be cut off and another pipe support cylinder must be reinserted into a new cut, and in order to perform repairs, a pipe support cylinder suitable for the joint pipe body shown in FIG. 14 must be installed. It means that you must always have it ready.

For this reason, a plug-in type pipe joint in which the pipe support cylinder is integrated with the joint pipe body as shown in FIG. 15 has been proposed. However, in the plug-in type pipe joint shown in FIG. ,
Although the problem of the pipe support cylinder separate from the joint pipe main body was solved, the ring end is attached to the tip of the pipe support cylinder in order to maintain liquid-tightness and airtightness between the fluid pipe and the pipe support cylinder. The ridges of the strip must be integrally formed. Therefore, it is not possible to easily attach the fluid pipe to the tip of the pipe support cylinder by inserting it. Further, the plug-in type pipe joint shown in FIG. 15 is intended for the fluid pipe made of a synthetic resin which is prone to change over time, so that it is completely different from the conventional plug-in type pipe joint shown in FIG. The same problem of sediment inflow will occur.

On the other hand, the plug-in type pipe joint shown in FIG. 16 was developed for facilitating the reworking (reconstruction) of the pipe, for example. The O-ring for ensuring the performance is housed in the moving chamber provided in the tip portion of the joint pipe body. That is, the O-ring of this joint pipe body is normally sealed in the state as shown in FIG. 16, but the length of the fluid pipe in which the O-ring is fitted to the outer periphery is adjusted, In the case of surface connection, the fluid pipe must be temporarily removed from the joint pipe body. In that case, it is necessary to insert a pushing jig (not shown) into the insertion base from the outside of the fluid pipe so that the O-ring can be pushed to the left of the movement guide in the drawing. A "gap" for inserting the tip of the pushing jig must be formed to some extent between the insertion base of the tube body and the insertion base.

This gap is not formed in consideration of the secular change of the O-ring, that is, the sealability between the fluid pipe and the insertion base is impaired.
As in the conventional plug-in type pipe joint shown in FIG. 4 or FIG. 15, the sealing property is obstructed by the inflow of sand grains. In other words, even in the plug-in type pipe joint in FIG. 16, it is considered that the workability is not so important that the sealing performance will not be sufficient in the long term.

In this type of plug-in type pipe joint, the insufficient sealing property causes a problem of so-called water leakage when the fluid pipe is a water pipe, for example. According to a survey by a city water department, the amount of wasted tap water is as high as 20%.
Not only is it an economic loss, but it is a large waste of resources. This indicates that this type of plug-in type pipe joint is not used to connect fluid pipes with sufficient liquid-tightness and air-tightness. The same applies when the pipe is a gas pipe.

Therefore, the inventor of the present invention makes full use of the advantages of the plug-in type pipe joint of this kind, which can connect the fluid pipes on the basis of the inserting work, and does not cause fluid leakage even after long-term use. The present invention has been completed as a result of various studies on how to achieve the above.

[0012]

The present invention has been made in view of the above circumstances, and the problems to be solved are as follows.
Regarding a plug-in type pipe joint for connecting a fluid pipe, it is to prevent fluid leakage even when used for a long period of time while improving the connection workability.

That is, the object of the invention according to claim 1 is to use a means for inserting the fluid pipes so that the connection between the fluid pipes can be performed by a simple operation and the pressure inside the fluid pipes can be achieved. Of course, the plug-in type pipe joint 100 capable of preventing the backflow of the fluid into the fluid pipe by the pressure on the outside of the fluid pipe and preventing the fluid leakage for a long time is provided with a simple structure. To do.

The object of the invention according to claim 2 is to achieve the same object as that of the invention according to claim 1 above, and also to reliably press the fluid pipe against the pipe support cylinder. An object of the present invention is to provide a plug-in type pipe joint 100 capable of further preventing fluid leakage.

[0015]

In order to solve the above problems, first, the means adopted by the invention according to claim 1 will be described with reference to the reference numerals used in the following embodiments. A joint pipe body 10 having a core conduit 11 and a taper surface 12 on the inner surface of the tip portion, and a pipe support cylinder 20 in which the tip portion 23 is screwed to face the taper surface 12 in the joint pipe body 10.
In order to secure the sealing performance between the fluid pipe 60 inserted outside the pipe support cylinder 20 and the joint pipe body 10, the first seal ring 31 locked in the holding groove 13 in the joint pipe body 10 is provided. And a fastening member 40 screwed onto the outer surface of the distal end portion of the joint pipe body 10 from above the fluid pipe 60, and the fastening member 40 and the fluid pipe 60 engaged with the holding groove 44 of the fastening member 40. And a second seal ring for ensuring a sealing property between the two, a plug-in type pipe joint for a fluid pipe 1 characterized by the following:
00 ”.

That is, in the plug-in type pipe joint 100 according to the first aspect, as shown in FIG. 2, the fastening member 40 is temporarily fastened to the joint pipe body 10 without inserting the fluid pipe 60 ( The plug-in type pipe fitting 100 excluding the fluid pipe 60 of FIG. 1), and then the fluid pipe 60 is inserted from the left side of the fastening member 40 in the drawing, and then the fitting pipe body 1 of the fastening member 40 is inserted.
By performing the final tightening for 0, the connection of the fluid pipe 60 by the plug-in type pipe joint 100 is completed. Therefore, in this plug-in type pipe joint 100, the connection work can be performed based on the work of inserting the fluid pipe 60, and the workability is very good.

Further, in the plug-in type pipe joint 100, the fluid pipe 60 may be connected thereto as follows. That is, as shown in FIGS. 9 and 10, by inserting the tip of the fluid pipe 60 through which the fastening member 40 is inserted into the outside of the pipe support cylinder 20 in the joint pipe body 10, as shown in FIG. The connection of the fluid pipe 60 is completed as shown in FIG. 1 by screwing the fastening member 40 on the pipe 60 to the outer second screw portion 14b on the joint pipe body 10 side.

Of course, when the fluid pipe 60 once piped is repositioned or the dimensions of the fluid pipe 60 are changed, the above-mentioned operations are reversed and after the adjustment is completed. Since the same work may be performed again, the reconstructing work can be easily performed. In the plug-in type pipe joint 100 of the present embodiment, the tip portion 2 of the pipe support cylinder 20 is
Since a stopper 24 is formed on the outer side of the pipe 3, the fluid pipe 6 inserted into the pipe support cylinder 20 and connected as shown in FIG.
No. 0 does not come off easily because the whole is buried in the soil or in the wall. However, the fluid pipe 6
If you want to work after re-construction immediately after connecting 0, fluid pipe 60
Since the retaining member 24 on the side of the pipe supporting cylinder 20 does not bite so much into the inner wall of, the removal of the fluid pipe 60 from the pipe supporting cylinder 20 can be performed with bare hands without requiring mechanical force or tools.

The outer first screw portion 14 on the right end side in the drawing of the plug-in type pipe joint 100 shown in FIGS. 1 and 2.
a is another device or meter for piping, the elbow pipe 17a shown in FIG. 12 or the T-shaped pipe 17 shown in FIG.
It is connected to b etc. in a liquid-tight and air-tight manner.

According to the plug-in type pipe joint 100 of claim 1,
Although there is no member such as a wedge ring 50 described later for pressing the fluid pipe 60 inserted on the pipe support cylinder 20, an alternative to the wedge ring 50 is the joint pipe body 10 or the fastening member 40. It may be integrally formed on the side. For example, a cutting cut in the axial direction is made in the insertion base portion 10b of the joint pipe body 10, and the insertion base portion 10b is cut.
When the fastening member 40 of b is screwed, the fastening member 40 may be pressed in the axial direction. In that case, the wedge pressing surface 4 to be described later provided on the fastening member 40.
As an alternative to 3, the insertion base 1 on the joint pipe body 10 side
0b, the pressing surface that will also press the tube support cylinder 20 side,
It may be formed on the inner surface of the fastening member 40.

If a fluid is supplied to the plug-in pipe joint 100 as described above in the connecting fluid pipe 60, the pressure of this fluid will be applied to each portion.
In 00, as shown in FIG. 1, the pipe support cylinder 20 is screwed to the inner threaded portion 15 of the joint pipe body 10 and
Since the fluid pipe 60 is fitted in and the first seal ring 31 seals between the joint pipe body 10 and the fluid pipe 60, the final seal ring 31 finally Prevents pressure leaks. Therefore,
No fluid leakage occurs at the connection portion of the fluid pipe 60 by the plug-in pipe joint 100.

Here, it is assumed that the flow of the fluid in the fluid pipe 60 is stopped. If the fluid is tap water, it means that the water is cut off. However, without knowing this, by opening the faucet, the pressure in the fluid pipe 60 due to the drop of water on the downstream side of the plug-in type pipe joint 100. May be slightly below atmospheric pressure. In that case, in the case of the conventional one shown in FIG. 14 to FIG. 16, water and soil in the soil may flow back into the insertion type pipe joint, but the insertion type pipe joint 100 of the present invention So that's not the case. The reason is that the liquid-tight state is maintained by screwing between the joint pipe body 10 and the fastening member 40, and the fluid pipe 60 and the fastening member 40 are sealed by the second seal ring 32. Because it is.

In other words, even if the flow of the fluid in the fluid pipe 60 is stopped and the outside of the plug-in pipe joint 100 is in a relatively high pressure state, the second seal ring 32 causes the fastening member 40 to move. Since the liquid-tight and air-tight seal is made between the fluid pipe 60 and the fluid pipe 60, no external matter flows into the plug-in pipe joint 100 or the fluid pipe 60. Therefore, in the conventional one, fine sand entered into the plug-in type pipe joint together with water and the like from the outside, and this sand hindered the sealing property of water and the like. Pipe fitting 100
At all that is not the case.

[0024] In order to solve the above-mentioned problem, a second aspect is provided.
The means adopted by the present invention relates to the plug-in type pipe joint 100 according to the above-mentioned claim 1, "By fastening the fastening member 40 to the joint pipe body 10, the tapered surface 12 on the joint pipe body 10 side and the fluid pipe 60 and a fluid pipe 60
Is provided with a wedge-shaped ring 50 that presses against the tube support cylinder 20.

That is, in the plug-in type pipe joint 100 according to the present invention, as shown in FIGS. 10 and 11, the fastening member 40 is attached to the joint pipe body 10 into which the fluid pipe 60 is inserted. When tightening, the tip of the wedge ring 50 is inserted into the gap formed between the insertion base portion 10b of the joint pipe body 10 and the fluid pipe 60, and the wedge ring 50 is tightened. It is configured to be pressed by tightening.

According to the plug-in type pipe joint 100 of the second aspect, as shown in FIG. 1, when the fastening of the fastening member 40 to the joint pipe body 10 is completed, the plug-in type pipe joint 100 is completed.
Since the tip end of the fluid pipe 60 against the pipe support cylinder 20 is pressed against the pipe support cylinder 20, the fluid pipe 60 can be firmly connected to the plug-in type pipe joint 100, and at the same time, the liquid tightness between the inside of the fluid pipe 60 and the outside world can be achieved. By sufficiently securing airtightness and airtightness, even if used for a long period of time, the problem of fluid leakage is prevented, and intrusion of sand that adversely affects the sealability of the first seal ring 31 and the second seal ring 32 is prevented. It will also be

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the invention according to each claim will be described with reference to a plug-in type pipe coupling 100 according to the embodiment shown in the drawings.
Since the invention according to each claim is substantially included, the following description will be focused on the plug-in pipe joint 100.

FIG. 1 shows a plug-in type pipe joint 10 according to the present invention.
0 is a cross-sectional view when one end portion of the fluid pipe 60 is connected, and the plug-in type pipe joint 100 in this case has an appearance as shown in FIG. The fluid pipe 60 used in this embodiment is a polyethylene pipe for water supply, and there are one type of soft and thick wall, and two types of hard and thin wall. Pipe fitting 10
0 can be used in any of the fluid pipes 60 for the following reason.

The plug-in type pipe joint 100 according to the present invention has a joint pipe body 10 having a pipe line 11 of an axial center and a tapered surface 12 on the inner surface of the tip portion, and a tip portion 23 is tapered in the joint pipe body 10. In order to secure the sealing performance between the pipe support cylinder 20 screwed to face the surface 12 and the fluid pipe 60 inserted into the outside of the pipe support cylinder 20 and the joint pipe main body 10, the joint pipe main body A first seal ring 31 that is locked in the holding groove 13 in the inside 10, a fastening member 40 that is screwed from above the fluid pipe 60 to the outer surface of the distal end portion of the joint pipe body 10, and a holding groove for this fastening member 40. The second seal ring, which is locked to 44 and secures the sealing property between the fastening member 40 and the fluid pipe 60, is a basic component thereof.

First, regarding the joint pipe main body 10, as shown in FIGS. 1 to 3, the joint pipe main body 10 is a brass having a pipe line 11 having an axis substantially the same as the inner diameter of the fluid pipe 60. It is integrally formed of a metal material such as metal or gun metal.
The joint pipe body 10 of the present embodiment has a connection base portion 10a on the right side in the drawing and an insertion base portion 10b on the left side, and is connected to another device or a connecting member by the connection base portion 10a. The fluid pipe 60 is connected to the insert base portion 10b side. An outer first screw portion 14a is formed on the connecting base portion 10a of the joint pipe main body 10 so that the connecting pipe portion 10a can be screwed to another device. The connecting base portion 10a is shown in FIG. Elbow tube 1
Naturally, it is also possible to implement by fixing the 7a and the T-shaped tube 17b shown in FIG. 13 in a linear liquid-tight and air-tight manner.

In the joint pipe body 10 of this embodiment, as shown in FIG. 1, a step for positioning the tip end surface 61 of the fluid pipe 60, which will be described later, is brought into contact with the substantially central portion thereof. The part 16 is formed. A holding groove 13 for accommodating and holding the first seal ring 31 shown in FIG. 5 is formed on the left side of the step portion 16 in the figure.
A tapered surface 12 is formed on the inner surface of the insertion base portion 10b located further to the left in FIG. This tapered surface 12 is
It is also for facilitating the insertion of the fluid pipe 60, and for that purpose, the diameter of the opening end of the insertion base portion 10b is made larger than the diameter of the fluid pipe 60. Further, as shown in FIGS. 1 and 3, this joint pipe body 1
An inner threaded portion 15 is formed on the left side of the stepped portion 16 of No. 0, and a pipe support cylinder 20 described below can be screwed into the inner threaded portion 15.

As shown in FIGS. 1 and 4, the pipe support cylinder 20 has a pipe passage 21 at the center thereof, which can be inserted into the fluid pipe 60 and allows a fluid to pass therethrough. On the outer periphery of the right end in the figure, there is a threaded portion 22 that is screwed into the inner threaded portion 15 on the joint pipe body 10 side. That is, this tube support cylinder 20
Is integrally formed with the joint pipe body 10 by screwing the screw portion 22 to the inner screw portion 15, but is basically formed as a separate body from the joint pipe body 10. is there. The reason is that the inner diameter of the fluid pipe 60 inserted into the pipe support cylinder 20 may be different, and in that case,
This is because it is possible to deal with this by replacing only the pipe support cylinder 20 without changing the configuration of the joint pipe body 10. If the pipe support cylinder 20 is integrated with the joint pipe main body 10 like the one shown in FIG. 15 which is a conventional example, it is very costly to form the pipe support cylinder 20 by such shaving. Not only that, it is not possible to easily deal with the change in the diameter of the fluid pipe 60.

Further, in this pipe support cylinder 20, as shown in FIG.
As shown in FIG. 5, a stopper 24 is formed on the outer peripheral surface of the tip portion 23 which is the left end (the end portion on the side opposite to the screw portion 22) in the figure. The retainer 24 prevents the fluid pipe 60 inserted into the pipe support cylinder 20 from coming off, and has a plurality of stepped portions having a directivity that makes insertion easy but makes removal difficult. It is composed by.

The first sealing ring 31 having an inner diameter slightly smaller than the outer diameter of the fluid pipe 60 is housed and held in the holding groove 13 of the joint pipe body 10 described above.
As shown in FIG. 5, the first seal ring 31 is formed of an elastic material such as synthetic rubber as an annular member. As shown in FIG. 14, the first seal ring 31 ensures a sealing property between the insertion base portion 10b on the joint pipe body 10 side and the fluid pipe 60 inserted on the pipe support cylinder 20. And the plug-in pipe joint 100 of the present invention
In the above, a second seal ring 32 similar to the first seal ring 31 is provided on the fastening member 40 side to be fastened to the joint pipe body 10 side.

As shown in FIGS. 1 and 8, the fastening member 40 has a threaded portion 41 formed on the inner surface of the right end portion in the figure, on the outer surface of the insertion base portion 10b on the joint pipe body 10 side. The joint is formed integrally with the joint pipe main body 10 by being screwed into the outer second screw portion 14b, and an insertion opening 42 for inserting the fluid pipe 60 is formed in the central portion thereof. The fastening member 40 is made of the same material as the joint pipe body 10 and must be rotated by a tool. Therefore, as shown in FIG. 2, a so-called hexagonal nut is used. It has such an outer shape. A holding groove 44 for accommodating and holding the above-mentioned second seal ring 32 is formed on the inner surface of the fastening member 40 forming the insertion opening 42.

Since the plug-in type pipe joint 100 of this embodiment also has the following wedge-shaped ring 50, the wedge-shaped ring 50 is inserted into the base portion 10b of the joint pipe body 10 side.
The fastening member 40 is formed with a wedge pressing surface 43 for pushing it into the space between the fluid pipe 60 and. Wedge pressing surface 43
1, as shown in FIG. 1, the insertion opening 4 of the fastening member 40.
2 is formed so as to be positioned on the right end side in the figure, and when the fastening member 40 is fastened to the joint pipe body 10 side, the wedge pressing surface 43 pushes the wedge ring 50 to the right side in the figure. This is what you will do.

As shown in FIGS. 1 and 6, the wedge-shaped ring 50 has a thin annular shape on the insertion side (the right side in FIG. 1), and the fastening member 40 side is on the left end surface in the figure. A chamfer is provided so as to face and contact the wedge pressing surface 43. Further, since the wedge-shaped ring 50 has to be reduced in diameter to some extent when it is pushed in by the fastening member 40, (a) in FIG.
As shown in FIG. 5, a plurality of notches 51 are axially formed on the left side of the drawing.

The wedge-shaped ring 50 is a fastening member 40.
When tightening the joint pipe body 10 with the joint pipe body 10, it is pushed by the fastening member 40 and press-fitted between the insertion base portion 10b of the joint pipe body 10 and the fluid pipe 60. The pipe 60 is pressed against the outer surface of the pipe support cylinder 20. The wedge-shaped ring 50 for pressing the fluid pipe 60 against the pipe support cylinder 20 has the fluid pipe 60 and the pipe support cylinder 20 as long as the pressing can be performed in a wide area.
Can be more sufficiently sealed with
In addition, the frictional resistance between the fluid pipe 60 and the pipe support cylinder 20 can be increased, and the retaining action of the fluid pipe 60 can be exerted. Therefore, the wedge-shaped ring 50 has an inner surface parallel to the outer surface of the fluid pipe 60 and an outer surface parallel to the tapered surface 12 formed on the insertion base portion 10b on the joint pipe body 10 side. It is designed to be.

Since the wedge-shaped ring 50 presses the fluid pipe 60 against the pipe support cylinder 20,
The length is such that when the fastening member 40 is fastened to the joint pipe body 10, most of it is located outside the tip portion 23 of the pipe support cylinder 20. In other words, the length of the tube support cylinder 20 is set to be sufficient so that the portion overlapping the wedge-shaped ring 50 is increased.

[0040]

As described above in detail, in the invention according to claim 1, first, as exemplified in the above-mentioned embodiment, "a joint pipe having a conduit 11 of an axial center and a taper surface 12 of an inner surface of a tip portion" is provided. A main body 10, a pipe support cylinder 20 in which a tip portion 23 is screwed to face the tapered surface 12 in the joint pipe main body 10, a fluid pipe 60 inserted outside the pipe support cylinder 20, and a joint pipe main body. In order to secure the sealing property with the first pipe 10, the first seal ring 31 locked in the holding groove 13 in the joint pipe body 10 and the outer surface of the tip portion of the joint pipe body 10 are screwed from above the fluid pipe 60. And a second seal ring that is locked in the holding groove 44 of the fastening member 40 to secure the sealing property between the fastening member 40 and the fluid pipe 60. " Has its structural characteristics, which allows Continuing can be done with a simple operation, and the pressure inside the fluid pipe can be prevented, and the pressure on the outside of this fluid pipe can prevent the reverse flow of fluid into the fluid pipe, preventing long-term fluid leakage. The plug-in type pipe joint 100 that can be provided can be provided with a simple configuration.

In addition, in the invention according to claim 2, in the plug-in pipe joint 100 according to claim 1 described above, "tapering of the joint pipe body 10 side by fastening the fastening member 40 to the joint pipe body 10 is performed. The wedge-shaped ring 50 which is inserted between the surface 12 and the fluid pipe 60 to press the fluid pipe 60 against the pipe support cylinder 20 is provided ". The plug-in type pipe that can exert the same effect as that of the first aspect of the present invention, can reliably press the fluid pipe against the pipe support cylinder, and can further prevent the fluid leakage. The joint 100 can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a fluid pipe is connected to a plug-in type pipe joint according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a view showing a joint pipe main body constituting a plug-in type pipe joint, (a) is a partially cutaway front view, and (b) is a side view showing both left and right sides at the same time.

FIG. 4 shows the same tube support cylinder, (a) is a partially cutaway front view, and (b) is a side view.

FIG. 5 is a sectional view (a) and a front view (b) showing the same ring.

FIG. 6 is a view showing the wedge-shaped ring, (a) is a partially cutaway front view, and (b) is a side view showing both left and right sides at the same time.

FIG. 7 is a sectional view (a) and a front view (b) showing the second seal ring.

FIG. 8 is a view showing the same fastening member, (a) is a partially cutaway front view, and (b) is a side view showing both left and right sides at the same time.

FIG. 9 shows a state in which a fluid pipe is connected to the insertion type pipe joint of the present invention, and is a partial cross-sectional view when a fastening member and a wedge ring are mounted on the fluid pipe.

FIG. 10 is a partial cross-sectional view showing the next stage shown in FIG. 9 when the insertion of the fluid pipe onto the pipe support cylinder is completed.

FIG. 11 is a partial cross-sectional view showing the next stage shown in FIG. 10 and showing a state in which the wedge ring is temporarily inserted between the insertion base portion of the joint pipe body 10 and the fluid pipe.

FIG. 12 is a partial cross-sectional view showing an example in which the plug-in type pipe joint according to the present invention is integrated with an elbow pipe.

FIG. 13 is a partial cross-sectional view showing an example in which the plug-in type pipe joint is integrated with a T-shaped pipe.

FIG. 14 is a sectional view showing a conventional plug-in type pipe joint.

FIG. 15 is a cross-sectional view showing another conventional plug-in type pipe joint.

FIG. 16 is a sectional view showing still another conventional plug-in type pipe joint.

[Explanation of Codes] 100 Plug-in Pipe Joint 10 Joint Pipe Main Body 10a Connection Base 10b Plug-in Base 11 Pipeline 12 Tapered Surface 13 Retaining Groove 14a Outer First Threaded Part 14b Outer Second Threaded Part 15 Inner Threaded Part 16 Stepped Part 20 Pipe Support Cylinder 21 Pipe Line 22 Threaded Part 23 Tip Part 24 Detachment 31 First Seal Ring 32 Second Seal Ring 40 Tightening Member 41 Threaded Part 42 Insertion Opening 43 Wedge Press Face 44 Holding Groove 50 Wedge Ring 51 Cut 60 Fluid pipe 61 Tip surface

Claims (2)

[Claims] 1. A joint pipe main body having an axial conduit and a taper surface on the inner surface of the tip portion, and a pipe support cylinder in which the tip portion is screwed so as to face the tapered surface in the joint pipe body. A first seal ring locked in a holding groove in the joint pipe body, in order to secure a sealing property between the fluid pipe inserted outside the pipe support cylinder and the joint pipe body; A fastening member that is screwed onto the outer surface of the distal end portion of the joint pipe body from above the pipe, and is secured in a holding groove of the fastening member to ensure the sealing property between the fastening member and the fluid pipe. A plug-in type pipe joint for a fluid pipe, comprising a second seal ring. 2. By fastening the fastening member to the joint pipe body, the fluid pipe is inserted between the tapered surface on the joint pipe body side and the fluid pipe, and the fluid pipe is pressed against the pipe support cylinder. The plug-in type fitting for a fluid pipe according to claim 1, further comprising a wedge-shaped ring.