JP2002188770A - Pipe with seismic function - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To lay a pipe by a propulsion method while curve-propelling a pipe having an earthquake-resistant function at a joint between a receiving port and an insertion port. SOLUTION: A projection 15 is provided on an outer peripheral portion of an insertion opening 4 not entering a receiving opening 2 so as to be movable integrally with the insertion opening 4, and a projection 16 is formed on the projection 15 along the outer periphery thereof. Further, a propulsion force transmitting member 17 longer than the axial length of the protruding portion 15 is provided along the outer circumference of the protruding portion 15 so as to be able to engage with the protrusion 16, and the propulsion force transmitting member 17 is in contact with the receiving port 2. The end face 18 is formed obliquely, and the end face 18 is configured so that the end face 20 of the receptacle 2 can be pressed in accordance with the inclination of the end face 18, and the insertion port 4 is formed via the projection 15 and the thrust transmitting member 17. It is configured to be able to transmit the propulsion force between the port and the receiving port 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe having a seismic function.

[0002]

2. Description of the Related Art There is known a propulsion method in which a pipe is laid by propelling a pipe underground. The propulsion pipes used in this propulsion method have insertion ports formed at the ends of the other pipes inserted into the reception ports formed at the ends of one of the pipes to be joined to each other. Propulsion force is transmitted to and from the insertion opening. This thrust is transmitted with the insert fully inserted into the receptacle,
Therefore, when the installation of the pipeline is completed, the insertion port cannot enter the inside of the receiving port any more.

On the other hand, there is known an earthquake-resistant tube provided with a separation preventing function and a telescopic function between a receiving port and an insertion port. In this seismic pipe, when an earthquake occurs after the pipeline is laid, the expansion and contraction to allow the insertion port to slip out of the reception port or enter the reception port within a certain range due to the seismic force, It is formed in the joint part of the opening and the opening. In other words, for seismic pipes, when the installation of the pipeline is completed,
The spout must not be completely inserted into the spout.

[0004] For this reason, in an earthquake-resistant pipe, it is not possible to lay a pipeline in the ground by a propulsion method, and it is common to bury the pipe using an open-cutting method.

[0005]

However, when a pipeline is to be laid under a river or a track, it is difficult to adopt a conventional open-cutting method. In the case where a pipe is buried under a road, there is a problem in that the use of the open-cutting method may impede traffic, such as the need to restrict traffic. Further, when the pipe line to be laid is curved, the digging work becomes more difficult and the work efficiency is inevitably reduced.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a problem and to provide a joint between a receiving port and an insertion port which can be laid by a propulsion method while curving a pipe having an earthquake-resistant function. I do.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that the inside of a receiving port formed at one end of one pipe to be joined to the other is connected to the end of the other pipe. In a tube having a seismic function in which a formed opening is inserted and a separation preventing function and a telescopic function are provided between the receiving opening and the inserting opening, the outer periphery of the inserting opening that does not enter the receiving opening. A first member provided so as to be movable integrally with the insertion opening, a projection formed on the first member, and a second member longer than the axial length of the first member. A member is provided along the outer periphery of the first member so as to be able to engage with the protrusion, an end surface of the second member is formed obliquely to an axial direction of the second member, and the second member The end face of the socket is configured to be able to be pressed by the first member and the second member. Through the wood is obtained by configured to enable transmission of driving force between the spigot and the socket.

According to such a configuration, the force acting in the pipe axis direction of the insertion opening to press the receiving opening, that is, the propulsive force, is the force of the first member provided along the outer periphery of the insertion opening. The shear force acting on the projection is transmitted to the second member, and the second member presses the end face of the receptacle in an oblique direction based on the inclination of the end face.

Thus, the receiving port receives the propulsive force via the first member and the second member in a direction inclined with respect to the pipe axis direction of the insertion port.
By making the structure such that the insertion port does not completely enter the receiving port by the member and the projection and the second member, the pipe having the anti-seismic function can be laid at the joint portion by the propulsion method while performing curve propulsion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a socket 2 is formed at one end of a cast iron pipe 1 joined to each other, and a socket 2 is formed at an end of the other cast iron pipe 3. The insertion opening 4 to be inserted into the inside is formed. A cement mortar lining layer 5 is formed on the inner circumference of the tubes 1 and 3.

An annular rubber sealing member 7 is disposed in the sealing member receiving groove 6 on the inner periphery of the receiving port 2. A lock ring housing groove 8 is formed on the inner periphery of the receiving port 2 on the back side of the seal material housing groove 6, and a metal lock ring 9 is attached to the housing groove 8 in the circumferential direction. . Lock ring 9
A rubber ring 10 for holding the lock ring 9 in a state of being centered with respect to the receiving port 2 at the time of joining the joint is arranged between the outer periphery of the housing and the inner periphery of the accommodation groove 8. Reference numeral 11 denotes a back end face of the receiving port 2, and the lock ring 9 accommodated in the accommodation groove 8.
Is formed at a position at a predetermined distance from.

A protrusion 12 is formed on the outer periphery of the distal end portion of the insertion opening 4 so as to engage with the lock ring 9 from the back side of the receiving opening 2. A receiving port 2 in which a sealing material 7 and a lock ring 9 are accommodated is provided on the outer periphery of the distal end of the insertion port 4 including the projection 12.
Taper surface 1 that serves as a guide when inserting slot 4 into
3 are formed.

The projection 12 is formed such that the dimension in the tube axis direction is smaller than the distance from the lock ring 9 to the rear end face 11 described above. Therefore, in the range until the projection 12 hits the lock ring 9 or the rear end face 11,
The insertion port 4 is relatively movable with respect to the receiving port 2 in the tube axis direction.

A projection 15 having a rectangular cross section is provided on the outer periphery of the insertion opening 4 outside the reception opening 2, that is, at a portion which does not enter the reception opening 2. The protrusion 15 can be formed by fitting a metal ring into the insertion opening 4 and welding the ring. A protrusion 16 having a rectangular cross section is integrally formed on the outer periphery of an end of the protrusion 15 remote from the receiving port 2.

Between the projection 15 and the receiving port 2, there is provided a cylindrical metallic thrust transmitting member 17 longer than the length of the projection 15 in the tube axis direction. As shown in FIGS. 1 to 3, the propulsion force transmitting member 17 is configured to be divided in the circumferential direction and divided into 14 parts.
Is the division part.

As shown in FIG. 2, in the divided portion 14, radial protruding portions 21 are formed at the ends of the propulsion force transmitting member 17, and these protruding portions 21 are fastened by fastening elements 22 such as bolts and nuts. As a result, the thrust transmitting member 17 is assembled in a tubular shape.

As shown in FIG. 1, in this cylindrically assembled state, the propulsion force transmitting member 17 has an outer fitting so as to be slidable in the tube axis direction at a portion other than the projection 16 of the projection 15. It is fixed by the fastening element 22 and installed so that the end 23 of the thrust transmitting member 17 can engage with the projection 16 from the receiving port 2 side. The end face 18 of the thrust transmitting member 17 on the receiving port 2 side is formed obliquely with respect to the axial direction, and is configured such that the end face 18 can contact the end face 20 of the receiving port 2.

By configuring the projections 15 and the projections 16 and the propulsion force transmission member 17 as described above, one end face 18 of the propulsion force transmission member 17 comes into contact with the end face 20 of the receptacle 2 and the propulsion force is transmitted. Since the other end surface 23 of the force transmitting member 17 engages with the projection 16 of the projection 15 from the receiving port 2 side, the transmission of the propulsive force between the receiving port insertions is performed through the propulsive force transmitting member 17. At this time, since the end face 18 of the propulsion force transmission member 17 is formed obliquely with respect to the axial direction, the propulsion force is transmitted in a state where the receiving port 2 is oblique to the insertion port 4. That is, when laying a conduit, the insertion end 4 is inserted into the reception opening 2 so that the insertion end 4 does not touch the rear end surface 11 of the reception opening 2 and the reception opening 2 is connected to the insertion end 4.
, The propulsion force can be transmitted between the receiving port 2 and the insertion port 4.

A protruding portion 15 is formed and the thrust transmitting member 1 is formed.
Exterior concrete 24 is cast on the outer circumference of the pipes 1 and 3 except for the portion where the pipe 7 is provided. The exterior concrete 24 is cast for the purpose of reducing the propulsion resistance when laying a pipeline, and is formed so that its outer diameter corresponds to the maximum outer diameter of the receiving port 2.

In such a configuration, when joining the tubes 1 and 3 to each other, first, the rubber ring 1 is inserted into the receiving port 2 of the tube 1.
0, the lock ring 9 and the sealing material 7 are attached, and the insertion port 4 is inserted into the receiving port 2. Then, the protrusion 12 at the tip of the insertion opening 4 spreads the seal member 7, the lock ring 9, and the rubber ring 10 by the action of the taper surface 13, and positions the seal member 7 and the lock ring 9. It passes through and is located at a portion between the lock ring 9 and the rear end face 11.

On the other hand, a thrust transmitting member 17 is fitted on the outer periphery of the projection 15 formed in the insertion opening 4, and the end 23 of the thrust transmitting member 17 is connected to the projection 16 by the fastening element 22. It is fixed to the projection 15 in a state of being engaged.

At this time, the end face 18 of the thrust transmitting member 17
Is formed obliquely with respect to the axial direction, the insertion opening 4 is inserted into the reception opening 2, and the end face 18 becomes the end face 20 of the reception opening 2.
When the pipe 1 comes into contact with the pipe 3, the pipe 1 is inclined with respect to the pipe 3 until the end face 20 of the receptacle 2 contacts the end face 18 of the thrust transmitting member 17.

When laying the pipe, the pipe 1, in this state,
3 Let each other be pushed underground. In this case, for example, when transmitting the propulsion force from the insertion port 4 to the reception port 2, the propulsion force is transmitted to the propulsion force transmission member 17 as a shearing force acting on the projection 16 of the projection 15 of the insertion port 4. When the end face 18 of the thrust transmitting member 17 presses the end face 20 of the receptacle 2 in an oblique direction based on its inclination, the propulsive force is increased.
To the receiving port 2. That is, the pipe 1 is propelled while being inclined with respect to the pipe axis direction of the pipe 3 in the state shown in FIG. 1, and the pipe line is laid in the state shown in FIG.

The behavior when a force in the pipe axis direction acts on the joint portion at the time of occurrence of an earthquake or the like is as follows. FIG.
As shown in the figure, when a force acts in a direction in which the insertion opening 4 comes out of the reception opening 2, the movement of the pipes 1 and 3 is not restricted by the projection 15 and the propulsion force transmission member 17, and the movement of the projection 15 The propulsion force transmitting member 1 fixed to the projection 15 by external fitting.
7 moves away from the socket 2 as a unit. Finally, the projection 12 of the insertion port 4 engages with the lock ring 9 from the back side of the reception port 2, and the insertion of the insertion port 4 from the reception port 2 is reliably prevented.

When a force acts in a direction in which the insertion port 4 enters the reception port 2 and the force is not so large, this force is applied to the reception port 2 and the insertion port 4 similarly to the case of the above-described thrust. And there is no expansion or contraction between the two.

On the other hand, as shown in FIG. 5, when a large force is applied, the projection 16 of the projection 15 is broken by the shearing force applied at that time. Then, the restraint by the projection 16 and the propulsion force transmission member 17 is released, whereby the protrusion 15 can move the inner peripheral portion of the propulsion force transmission member 17 in the pipe axis direction of the pipe 1, and the insertion port 4 is closed. Back end face 11
Until it hits.

In this manner, the function of expanding and contracting the joint portion and the function of preventing detachment thereof during the occurrence of an earthquake are ensured, and the performance as an earthquake-resistant joint is obtained. When the pipe 1 and the pipe 3 are propelled in a curve, the interval between the inner periphery of the receptacle 2 and the outer periphery of the insertion port 4 is increased outside the curve at the joint 26 between the receptacle 2 and the receptacle 4.
At this time, as long as the propulsion force transmission member 17 shown in FIGS. 1 to 3 has a protrusion 21 that is divided in the circumferential direction and has a length along the axial direction of the propulsion force transmission portion 17. By arranging the protruding portion 21 outside the curve, the end face 20 of the receptacle 2 displaced away from the insertion port 4 in the radial direction of the receptacle 2.
Since the protruding portion 21 can come into contact with the protruding portion 21, the propulsive force from the insertion port 4 can be efficiently transmitted to the receiving port 2.

As shown in FIG. 6 and FIG.
7, a propulsion force transmitting member 17 in which the protrusion 21 cannot be arranged outside the curve in the joint 26;
Is used, since the distance between the inner circumference of the receiving port 2 and the outer circumference of the insertion port 4 is wide on the outside of the curve, the area where the end face 18 of the thrust transmitting member 17 contacts the end face 20 of the receiving port 2 And the propulsion is not transmitted efficiently.

Therefore, instead of the thrust transmitting member 17 used in FIGS. 1 to 3, when the thrust transmitting member 17 having a circumferentially divided structure as shown in FIGS. 6 and 7 is used. , A projection 1 large enough not to hinder the propulsion of the pipe
9 is provided at an appropriate position along the end face 18 of the thrust transmitting member 17 so that the end face 20 of the socket 2 outside the curve in the joint portion 26 can be pressed. Thereby, the end surface 20 of the receiving port 2 can be pressed more reliably.

Further, even if the end face 18 of the propulsion force transmitting member 17 is not formed obliquely to the axial direction, as shown in FIG. For example, by providing a spacer 25 made of rubber, for example, having an inclined end face on the receiving side, on the outer periphery of the insertion port 4 between the end face of the receiving port and the thrust transmitting member in an externally fitted state. Similarly to the above-described embodiment of the present invention, in a state where the receiving port 2 is inclined with respect to the receiving port 4, the propulsive force from the receiving port 4 is transmitted through the receiving force transmitting member 17 to the receiving port 2. , So that the pipes 1 and 3 constituting the pipe having the seismic function can be propelled in a curve.

The projection 15 of the insertion opening 4 may be divided into a plurality of pieces along the circumferential direction, in addition to the annular one as described above. Also, the protrusion 16
Can be formed on the inner periphery of the propulsion force transmitting member 17 instead of or together with the outer periphery of the protrusion 15 as described above. The projections 16 may be continuous in the circumferential direction or may be divided in the circumferential direction. Further, as described above, the structure of the receiving port 2 and the insertion port 4 is such that the protrusion 12 at the tip of the insertion port 4 pushes out the sealing material 7 and the lock ring 9 of the receiving port 2 to enter the inside of the receiving port 2. Instead of the above, an appropriate one can be used.
That is, if it is a pipe joint having a seismic function provided with a detachment preventing function and a telescopic function between the receiving port 2 and the insertion port 4,
By applying the present invention, the pipe joint can be laid by a propulsion method while performing curve propulsion.

As described above, the end face 18 of the thrust transmitting member 17 is formed obliquely with respect to the axial direction of the thrust transmitting member 17, and this is used to transmit the thrust between the receiving port 2 and the insertion port 4. When the end face 18 of the thrust transmitting member 17 is in contact with the end face 20 of the receptacle 2, the thrust acting in the pipe axis direction of the insertion port 4 is applied to the pipe axis direction of the insertion port 4. Since the end face 20 of the inclined receiving port 2 can be made to act on the end face 20 via the propulsion force transmitting member 17, the pipes 1 and 3 constituting the pipe having the seismic function can be curved and propelled.

[0033]

As described above, according to the present invention, the force acting in the pipe axis direction of the insertion opening to press the receiving opening, that is, the propulsion force, is the first force provided along the outer periphery of the insertion opening. Is transmitted to the second member as a shear force acting on the projection of the member,
The second member presses the end face of the receptacle in an oblique direction based on the inclination at which the end face is formed.

Thus, the receiving port receives the propulsive force via the first member and the second member in a direction inclined with respect to the pipe axis direction of the insertion port, so that the pipe having the seismic function, that is, the first pipe is provided.
By making the structure such that the insertion port does not completely enter the receiving port by the member and the projection and the second member, the pipe having the anti-seismic function can be laid at the joint portion by the propulsion method while performing curve propulsion.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a pipe having an earthquake-resistant function according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a propulsion force transmitting member, a protrusion, and an insertion port in FIG.

FIG. 3 is a longitudinal sectional view showing a propulsion force transmitting member and a protrusion used in FIG.

4 is a partial cross-sectional view showing a state in which a force due to an earthquake is acting in a direction in which an insertion hole comes out of a reception port at a joint portion of the pipe having a seismic function in FIG.

FIG. 5 is a partial cross-sectional view showing a state in which a force due to an earthquake is acting in a direction in which the insertion port enters the reception port in the joint portion of the pipe having the earthquake-resistant function of FIG.

6 is a partial cross-sectional view showing a joint portion of a pipe having a seismic function using a thrust transmitting member having a structure different from that of the thrust transmitting member used in FIG.

FIG. 7 is a cross-sectional view showing a propulsion force transmitting member, a protrusion, and an insertion port used in FIG. 6;

FIG. 8 is a cross-sectional view showing a spacer, a propulsion force transmitting member, and a protrusion in an embodiment of the present invention different from those shown in FIGS. 1 and 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 pipe 2 receiving port 3 pipe 4 insertion port 15 protrusion 16 protrusion 17 propulsion transmission member 18 end face

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D054 AA02 AC18 AD28 AD29 3H015 BA02 BB04 BC01 BC08 CA01 CA13 3H104 JA02 JB01 JD06 KA01 KA04 KB20 LF16 LG22 MA08

Claims (1)

[Claims] 1. An insertion port formed at an end of another pipe is inserted into a reception port formed at an end of one pipe to be joined to each other, and a connection between the reception port and the insertion port is formed. In a pipe having a seismic function provided with a separation prevention function and a telescopic function between the first member and the outer peripheral portion of the insertion port that does not enter the receptacle, the first member can be moved integrally with the insertion port. A projection is formed on the first member, and a second member longer than the axial length of the first member can be engaged with the projection along the outer periphery of the first member. An end surface of the second member is formed obliquely to an axial direction of the second member, and an end surface of the receptacle can be pressed by the second member; Propulsion force can be transmitted between the insertion opening and the receiving opening via the member and the second member. Tube having a seismic function, characterized in that the sea urchin configuration.