JPH0972470A - Expansion fluid pipe for coupling fluid pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion fluid pipe for coupling a fluid pipe, having an expansion mechanism, to facilitate a work to couple to other fluid pipe and firmly prevent the occurrence of uncoupling. SOLUTION: An uncoupling force or a compression force exerted axially of a fluid pipe 2 is absorbed through relative movement of first and second pipe bodies 4 and 5. A regulation member arranged at the first and second pipe bodies 4 and 5 is integrally firmly fixed at the first and second pipe bodies 4 and 5 securely coupled to other fluid pipe 2 through a fixing tool 12, whereby easy uncoupling between the first and second pipe bodies 4 and 5 is prevented from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic tube having a seismic function, and more particularly to a telescopic fluid pipe for connecting fluid pipes having a telescopic function to absorb a separating force or a compressive force acting on a tubular body.

[0002]

2. Description of the Related Art Conventionally, when laying a fluid pipe in the ground, for example, as shown in FIG.
When using a plurality of fluid pipes A each having a predetermined length and the insertion port 02, the insertion port 02 of the other fluid pipe A connected to the receiving port 01 of one fluid pipe A is inserted and appropriately It was performed in the process of connecting each other using a fixing member.

In a fluid pipe laid by connecting a plurality of fluid pipes A having a predetermined length in this manner, the pipe body can absorb the movement of the ground when an earthquake or ground subsidence occurs. For example, as shown in FIG.
It was necessary to provide an expansion mechanism as shown in FIG.

Here, the expansion mechanism will be briefly described as follows.
In FIG. 8, 01 is a receiving part, 02 is an insertion part, and an insertion part 0
An annular protrusion 03 is formed on the outer surface of the distal end of the No. 2. The projection 03 is a ring-shaped member made of ductile cast iron, steel, or the like fixed to the insertion opening 02 by welding. The protrusion 03 may be formed integrally with the insertion port 02. On the other hand, on the inner surface of the receiving portion 01, a tapered surface 05 for installing the packing 04 is formed at the opening end thereof, and an annular groove 06 is formed on the inner side thereof.

Reference numeral 07 denotes a lock ring which can be inserted into the inner side of the receiving portion 01 from an annular space between the inner surface of the receiving portion 01 and the outer surface of the inserting portion 02, and has a diametrically expanding biasing force for dividing into a ring groove. It is fitted in 06. The annular groove 06 has a depth such that the inner peripheral portion of the lock ring 07 fitted therein can engage with the projection 03 at the tip of the insertion opening 02 in the pipe axial direction. The lock ring 07 is made of ductile cast iron, steel, or the like, and a backup ring 08 that abuts against the side surface of the packing 04 is disposed on the inner side of the receptacle 01.

Numeral 09 is a push ring split into two for pushing the packing 04. A T-shaped bolt 011 and a nut inserted into the hole provided in the flange 010 of the receptacle 01 and the hole provided in the push ring 09. It is attached by 012. By tightening the bolt 011 and the nut 012, a pressing force acts on the packing 04, and the sealing property between the receiving portion 1 and the insertion portion 02 is ensured.

In such a connecting portion B, as shown by a chain double-dashed line in the drawing, between the rear end surface 013 of the receiving portion 01 and the lock ring 07, the receiving portion 01 and the inserting portion 02 are arranged in the axial direction. Is allowed to move relative to each other, and the protrusion 03 and the lock ring 07 are engaged with each other to prevent the lock ring from coming off.

[0008]

However, in the case of connecting the fluid pipes A, A to each other so that they can move relative to each other, the connecting portion B must be provided with an expansion / contraction function, so the structure and There has been a problem that the work involved is complicated and the connection work is troublesome.

In order to prevent the insertion opening 02 from coming off, the lock ring 07 is inserted into the receiving opening 01 with the insertion opening 02 to which the protrusion 03 is fixed and then expanded in diameter into the annular groove 06. Since it is to be mounted and cannot be fixed to the fluid pipe A in advance by integral molding or welding, when a particularly strong force is applied to the insertion port 02 in the detaching direction, the lock ring 07
Might deviate from the annular groove 06.

The present invention has been made by paying attention to such problems, and it is easy to connect with other fluid pipes, and the expansion and contraction for fluid pipe connection is provided with an expansion and contraction mechanism which is firmly prevented from being detached. The purpose is to provide a fluid pipe.

[0011]

In order to achieve the above-mentioned object, in a telescopic fluid pipe for fluid pipe connection according to the present invention, a receiving portion is provided at one end and another pipe is provided at the other end. A stretchable fluid pipe for fluid pipe connection, which has fluid outlet pipes that can be inserted into the receptacle portion of the body, and which is formed at the receptacle portion. A first pipe body that is connected to the flange portion and that has a fixing tool that has a locking means that locks the insertion port of another fluid pipe; and the first tube having an insertion port at one end. A second tube body slidably fitted into the body via a seal material, and the first and second tube bodies are formed by abutment of restricting members provided on the respective tube bodies. The detachment is prevented, and at least the restriction member is integrally fixed to the pipe body or is firmly fixed by welding or the like. To have. According to this feature, the separating force or compressive force applied in the tube axis direction of the pipe body is
It is designed to be absorbed by the relative movement of the tubular body,
Since the restricting members provided on the first and second pipes are integrally and firmly fixed to the respective first and second pipes that are connected and fixed to the other pipes via the fixtures. , The first, the second
The tubes do not easily separate from each other.

In the telescopic fluid pipe for fluid pipe connection according to the present invention, the restricting member has an annular projection protruding from the inner surface of the first pipe body and the second pipe body in the first pipe body. It is preferable that the outer surface is a ring-shaped protrusion that is provided so as to be able to contact the protrusion. By doing so, the strength for preventing slipping out is improved.

In the telescopic fluid pipe for connecting a fluid pipe of the present invention, the inside diameter is at least one smaller than the outside diameter of the second pipe body in the groove portion provided in the vicinity of the receiving portion of the first pipe body. It is preferable that a split stopper ring is fitted so that an insertion end of another fluid pipe connected and fixed to the first pipe body by the fixture is brought into contact with the stopper ring. . By doing so, the insertion work of the insertion portion of the other fluid pipe to be inserted into the elastic fluid pipe can be performed in the same manner as the connection of the other fluid pipe, and the expansion / contraction amount of the elastic fluid pipe is sufficiently increased. Can be secured. Further, since the stopper ring is strongly supported from the back by the fluid pipe connected and fixed to the first pipe body,
Even if the second pipe collides with the stopper ring, the stopper ring will not come off.

In the telescopic fluid pipe for connecting a fluid pipe of the present invention, the sealing material is formed into a first tubular body and a second tubular body by a pressing member utilizing the flange portion at the end of the first tubular body. It is preferable that it can be pressed from outside during the period. By doing so, the mounting of the sealing material can be carried out on the first pipe of the second pipe body.
Since it can be performed after fitting into the pipe body, not only the mounting of the sealing material is simplified, but also a reliable sealing is achieved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, a telescopic fluid pipe 1 of a first embodiment of the present invention is a fluid having a predetermined length. The state in which the pipes 2 and 2 are connected in a water-sealed state is shown. The structure of the fluid pipe 2 is almost the same as that of the fluid pipe A described in FIG. 7, and an insertion portion 2a and a receiving portion 2b having a flange portion 3 are formed at both ends of each fluid pipe 2. The shapes are such that they can be connected to each other.

The elastic fluid tube 1 has a first tube body 4 having an outer diameter larger than that of the insertion port 2a of the fluid tube 2, and an outer diameter substantially equal to that of the insertion port 2a. The second tubular body 5 is included in the first tubular body 4, and the second tubular body 5 is slidably fitted in the first tubular body 4. In this elastic fluid pipe 1, the first tubular body 4 itself is a receiving portion,
The second tubular body 5 itself functions as an insertion portion.

A flange portion 6 is formed at one end of the first tubular body 4, and an annular fixture 12 is connected to the flange portion 6 via a T-shaped bolt 13 and a nut 14. A locking claw 15 as a locking means is provided inside the fixture 12, and the locking claw 15 is pressed against the outer surface of the fluid pipe 2 by a push bolt 16 to move the fixture 12 to the fluid pipe 2.
Can be fixed to.

Reference numeral 17 denotes the inner surface of the opening of the first tubular body 4 and the fluid pipe 2.
It is a packing for sealing the outer surface, and by tightening the nut 14 of the T-shaped bolt 13, the pressing portion 12a of the fixture 12 is always urged inwardly of the first tubular body 4. .

Reference numeral 11 is a stopper ring having a substantially L-shaped cross-section, which has a biasing force for expanding the diameter in one piece and has an inner diameter smaller than at least the outer diameters of the second pipe body 5 and other fluid pipes 2. Is fitted in the annular groove 10 of the first pipe body 4 so as to regulate the contact between the end face of the fluid pipe 2 and the end face of the second pipe body 5, respectively.

On the inner peripheral surface of the other end of the first tubular body 4, annular projecting portions 7 and 8 are provided so as to be spaced apart from each other, and between the projecting portions 7 and 8 of the first tubular body 4. A packing 9 that seals between the inner surface and the outer surface of the second tubular body 5 is fitted. These protrusions 7 and 8 are guides for preventing positional displacement of the packing 9 in the left-right direction, and particularly in the protrusion 8, an annular protrusion formed on the outer periphery of the end of the second tubular body 5. 18 is abutted and regulated, and functions as a regulation member that prevents the second tubular body 5 from coming off.

Since the other end of the second pipe body 5 can be inserted into the receiving portion 2b of the other fluid pipe 2 having the flange portion 3, the same fixture 12 and packing 17 as described above are used. The other fluid pipe 2 can be connected and fixed.

Next, the telescopic fluid pipe 1 having the above-mentioned structure
The process of connecting the fluid pipe 2 to the fluid pipe 2 will be described with reference to FIGS. 2 to 4. First, as shown in FIG. 2, an annular packing 9 is fitted between the protrusions 7 and 8 of the first pipe body 4. The first tubular body 4
The second pipe body 5 is inserted into the first pipe body 4 from the opening on the side of the flange portion 6, that is, on the right side in the drawing, with the protrusion 18 facing backward. Then, the second tubular body 5 is provided with the protrusion 1 as shown in FIG.
After being inserted into the packing 9 until 8 passes through the annular groove 10 of the first tubular body 4, the stopper ring 11 is fitted into the annular groove 10.

In order to connect the elastic fluid pipe 1 to the existing fluid pipe 2 shown in FIG. 4, first, the insertion portion 2 of the fluid pipe 2 is connected.
a Fixing tool 12 and packing 17 are fitted around the outer circumference. Then, the telescopic fluid pipe 1 is moved in the direction of the arrow in the figure until the stopper ring 11 comes into contact with the end face of the insertion opening 2a.

Here, the fixture 12 and the flange portion 6 of the first tubular body 4 are connected via a T-shaped bolt 13 as shown in FIG. By tightening the nut 14, the pressing portion 12a of the fixture 12 strongly presses the packing 17 toward the first tube body 4, and thus the gap between the first tube body 4 and the fluid tube 2 is sealed. In this state, press the locking claw 15 via the push bolt 16 of the fixture 12,
The fixture 12 and the fluid pipe 2 are fixed.

In this way, the fluid pipe 2 and the first pipe body 4 are connected and fixed via the fixture 12 and the T-shaped bolt 13. Further, in order to connect the succeeding fluid pipe 2 as shown by the one-dot chain line in FIG. 4 to the end portion of the second tubular body 5 of the elastic fluid pipe 1, the fixture 12 and the packing 17 are attached to the second tubular body 5. After fitting, it may be connected and fixed in the same process as described above.

In the expandable fluid pipe 1 thus constructed, as shown in FIG. 5, the first and second pipe bodies 4, 5 are
Since the protrusion 8 and the stopper ring 11 can be moved relative to each other by a distance L, it is possible to absorb the compressive force, the detaching force, and the like applied in the axial direction of the tubular body due to an earthquake, ground subsidence, or the like. .

Further, even when the detaching force acts on the pipe body and the protrusions 8 and 18 as the regulating members come into contact with each other, they are connected and fixed to the other fluid pipes 2 through the fixtures 12, respectively. Preliminarily integrally and firmly fixed to the first and second pipe bodies 4 and 5,
Since the protrusions 8 and 18 are less likely to be damaged or deviated, there is no fear that the first and second pipe bodies are easily separated from each other.

Further, a stopper ring 11 is fitted in an annular groove 10 provided in the vicinity of the receiving portion of the first pipe body 4, and the stopper ring 11 is connected and fixed to the first pipe body 4 by a fixing tool 12. The end portion of the insertion opening portion 2a of the other fluid pipe 2 that has been contacted is brought into contact with the insertion opening portion 2a of the other fluid pipe 2 that is inserted into the telescopic fluid pipe 1. The work can be performed by the same work as connecting the other fluid pipes 2 to each other, and the expansion / contraction amount of the expansion / contraction fluid pipe 1 can be sufficiently secured. Further, since the stopper ring 11 is strongly supported from the back surface by the fluid pipe 2 connected and fixed to the first pipe body 4, even if the second pipe body 5 collides with the stopper ring 11, the stopper ring 11 can be removed. There is no.

The shape of the first tubular body 4 is not particularly limited to this embodiment, and as shown in FIG. 6, a flange portion 19 is formed at the end of the first tubular body 4, and the flange portion 19 is formed. Alternatively, the pressing member 20 may be pressed by the T-shaped bolt 21 and the nut 22. By doing so, the packing 23 can be mounted after the second tube body 5 is fitted into the first tube body 4, so that the fitting of the packing 23 as a seal member is simplified. As well as a reliable seal is achieved.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention, the present invention is not limited. Included in the invention.

[0031]

The present invention has the following effects.

(A) According to the invention of claim 1, the separating force or the compressing force applied to the tubular body in the axial direction of the tubular body is absorbed by the relative movement of the first and second tubular bodies. Since the restriction member provided in the first and second pipes is integrally and firmly fixed to each of the first and second pipes that are connected and fixed to the other pipes via the fixtures, The first and second pipe bodies are not easily separated from each other.

(B) According to the second aspect of the present invention, the strength for preventing slipping out is improved.

(C) According to the third aspect of the invention, the insertion work of the insertion portion of the other fluid pipe to be inserted into the expansion / contraction fluid pipe can be performed in the same manner as the connection of the other fluid pipe, and the expansion / contraction is performed. A sufficient amount of expansion and contraction of the fluid pipe can be secured. Further, since the stopper ring is strongly supported from the back surface by the fluid pipe connected and fixed to the first pipe body, the stopper ring does not come off even if the second pipe body collides with the stopper ring.

(D) According to the invention of claim 4, the mounting of the sealing material can be performed after the mounting of the sealing material after the insertion of the second tubular body into the first tubular body, so that the mounting of the sealing material is simplified. Not only is a reliable seal achieved.

[0036]

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a usage state of a telescopic tube according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing one step of a connecting action to another fluid pipe during expansion and contraction of FIG.

FIG. 3 is a cross-sectional view showing one process of connecting to another fluid pipe during expansion and contraction of FIG.

FIG. 4 is a cross-sectional view showing a step of connecting operation to another fluid pipe during expansion and contraction of FIG.

FIG. 5 is a cross-sectional view of an essential part showing an operation corresponding to FIG.

FIG. 6 is a cross-sectional view showing a telescopic tube according to another embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing a connected state of a conventional fluid pipe.

8 is a partially enlarged sectional view corresponding to FIG.

[Explanation of symbols]

 1 Stretchable Fluid Pipe 2 Fluid Pipe 2a Insertion Portion 2b Receiving Portion 3 Flange Portion 4 First Tubular Body 5 Second Tubular Body 6 Flange Section 7 Projection Section 8 Projection Section (Regulating Means) 9 Packing 10 Annular Groove (Groove Section) 11 Stopper ring 12 Fixing tool 12a Pressing part 13 T-shaped bolt 14 Nut 15 Locking claw (locking means) 16 Pushing bolt 17 Packing 18 Protrusion (regulating means) 19 Flange 20 Pressing member 21 T-shaped bolt 22 Nut

Claims (4)

[Claims] 1. A receptacle part at one end, and another end part at the other end,
A telescopic fluid pipe for fluid pipe connection, which can connect fluid pipes having an insertion part that can be inserted into the reception part of another pipe body, the reception part being at one end and the reception part. A first tube body that is connected to a flange portion formed on the first pipe body and that includes a fixture having locking means that locks an insertion port portion of another fluid pipe; and an insertion port portion at one end, A second tubular body slidably fitted into the first tubular body via a sealing material, and the first and second tubular bodies are provided with restricting members provided on the respective tubular bodies. The contact is prevented from coming off, and at least the regulating member is integrated with the tubular body,
Alternatively, a telescopic fluid pipe for fluid pipe connection, which is firmly fixed by welding or the like. 2. The restricting member projects into an annular projection protruding from an inner surface of the first tubular body and an outer surface of a second tubular body in the first tubular body so as to come into contact with the projecting portion. The telescopic fluid pipe for fluid pipe connection according to claim 1, which is an annular projection provided. 3. A stopper ring having an inner diameter at least smaller than the outer diameter of the second tube is fitted into a groove provided in the vicinity of the receiving section of the first tube, and the stopper ring is fitted in the groove. The insertion end portion of the other fluid pipe connected and fixed to the first pipe body by the fixing member is brought into contact with the first pipe body.
An elastic fluid pipe for fluid pipe connection according to item 2. 4. The seal member can be pressed from the outside between the first pipe body and the second pipe body by a pressing member using a flange portion at an end portion of the first pipe body. Item 1
An elastic fluid pipe for fluid pipe connection according to any one of 1 to 3.