JPS5924313B2 - Internally bonded seismic pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an internal bonding force type pipe joint having an earthquake-resistant function.

Pipe joints of the inner surface joint type, in which the socket and the insertion port are watertightly connected from the inner surface of the pipe, are known, but in recent years there has been a demand for such pipe joints to have an earthquake-resistant function. Ta.

This seismic resistance function is achieved by allowing relative movement within a certain range in the tube axis direction between the sockets and sockets that are fitted together, but reliably preventing them from coming out due to further movement. be done.

The object of the present invention is to provide such an internally bonded earthquake-resistant pipe joint.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
1 is a socket, 2 is a socket, and 3 is a sealing material interposed between the sealing material attachment tapered surface 4 on the inner circumference of the socket 1 and the outer peripheral surface of the socket.

Reference numeral 5 denotes a pressing means for pressing the sealing material 3 from the inside of the socket toward the tapered surface 4, one end of which is in contact with the back of the sealing material 3 via a relay side ring 6, and the other end is in contact with the back of the sealing material 3. is abuttingly engaged with the stepped surface 7 at the rear end of the socket.

The suppressing means 5 usually has a push ring 8 divided into multiple parts in the circumferential direction and a push bolt 9 screwed into the push ring 8.
is rotated from the space between the tip of the socket 2 and the step surface 7 at the rear end of the socket, thereby pressing the sealing material 3 and ensuring watertightness between the sockets.

17 is a backup ring.

Reference numeral 10 designates a circumferential plurality of engagement cylinders having one end fitted inside the tip of the socket 2, which is fixed to the top of the socket 2 by set bolts 11 arranged at appropriate intervals in the circumferential direction, The outer surface of the tip of the cylinder 11 has an annular engagement protrusion 12 that is located on the inner side of the inner surface of the socket 1 and can be engaged with an annular engagement protrusion 12 that is located on the inner side of the inner surface of the socket 1. A protrusion 13 is provided.

Reference numeral 14 denotes an annular protrusion that fits into the annular groove 15 of the socket 2.

Note that the socket inner surface 16 on which the engaging protrusion 12 protrudes is formed to have a larger diameter than the normal diameter portion of the pipe, and the engaging cylinder 1
The inward direction of 0 is set to be the same diameter as the inner surface of the mortar lining 17 provided on the inner surface of the tube.

According to such a configuration, the engagement between the engagement protrusion 12 of the receptacle 1 and the engagement protrusion 13 on the receptacle side 2 prevents it from being pulled out, and the engagement protrusion 13 on the receptacle side Relative movement between the socket 2 and socket 1 is allowed within the range in which the socket 2 is movable or until the tip of the socket 2 comes into contact with the push ring 8, and therefore has an earthquake-resistant function.

When joining the joint, after inserting the socket 2, apply the sealing material 3,
After installing the side wheels 6, push rings 8, etc., the engaging cylinder 10 is installed.
It is only necessary to attach the joint to the socket 2, and in this way all the joints can be joined by working from the inside.

As described above, the present invention provides an engaging protrusion protrudingly provided on the inner surface of the socket located on the back side of the socket's rear end stepped surface for contacting the pressing means of the sealing material, and the engaging protrusion. Since the pipe fitting is equipped with a plurality of circumferentially divided engagement cylinders that can be secured to the pipe fitting at the tip of the fitting, it is possible to provide a pipe joint that has earthquake-resistant and watertight functions and can be joined entirely from the inside. can.

[Brief explanation of the drawing]

The drawing is a longitudinal side view showing an embodiment of the present invention. 1... socket, 2... insertion, 3...
...Seal material, 4...Seal material attachment tapered surface,
5... Pressing means, 7... Back end step surface, 1
0... Engagement cylindrical body, 12, 13... Engagement protrusion.

Claims (1)

[Claims] 1 A pipe in which a sealing material is arranged between the tapered surface on which the sealing material is attached on the inner surface of the socket and the outer surface of the socket, and a means for pressing the sealing material is arranged between the sealing material and the step surface at the back end of the socket. In the joint, an annular engagement protrusion is provided on the inner surface of the socket that is placed upright on the back side of the step surface at the rear end of the socket, and a plurality of circumferential restraints are provided at the tip of the socket, one end of which fits internally into the tip of the socket. The engagement cylinder is fixed, and an annular engagement protrusion that can be engaged with the engagement protrusion of the socket from the back side of the socket is provided on the outer surface of the distal end of the engagement cylinder. Internally bonded earthquake-resistant pipe fitting.