JPS6227754Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an integrated joint for joining inside a pipe.

For example, in the pipe-in-pipe construction method, which involves inserting a new pipe into an existing pipe, uneven water pressure and centrifugal force due to flow velocity act on curved parts of irregularly shaped pipes, which may cause the joint between the socket and the socket to loosen. Because of this, protective work, etc., are required to protect against this, resulting in poor workability.

Therefore, an object of the present invention is to strengthen the connection between the socket and the socket by integrally fixing the socket and the socket in the joint part to each other.

In order to achieve this purpose, the present invention provides a sealing material between the inner surface of the socket and the outer surface of the socket, and a radially inward protrusion is provided in the socket part on the back side of the sealing material. A radial abutting end surface capable of abutting against the inner protrusion is formed at the distal end of the tip, a female threaded hole extending in the tube axis direction is provided from the abutting end surface at an appropriate position in the circumferential direction of the distal end, and the female threaded hole A bolt through hole is provided to penetrate the inner protrusion, and the bolt is screwed into the female threaded hole through the bolt through hole, thereby fixing the tip of the insertion port and the inner protrusion of the socket. It is equipped with a bolt.

Therefore, the socket and the socket can be integrally fixed to each other, which not only eliminates the need for conventional protective work on irregularly shaped pipes in the pipe-in-pipe construction method, but also eliminates the need for integration work within the pipe. This allows for good workability, and all accessories other than the fastening bolts can be used with ordinary pipe joints.

Hereinafter, one embodiment of the present invention will be described based on the drawings. In the drawing, 1 is a socket, and 2 is a socket, and a wide annular recess 3 is formed on the inner surface of the socket 1 near the opening end, and this annular recess 3
A radially inward protrusion 5 continuous to the inner side surface 4 is formed in an annular shape. An annular protrusion 6 is formed in the vicinity of the socket opening end of the annular recess 3, and an annular sealing material 7 that engages with the protrusion 6 is formed between the annular recess 3 and the outer surface of the socket 2. It is located. An appropriate number of push rings 8 in the circumferential direction are arranged on the back side of the sealing material 7, and the push rings 8 are screwed into positions at appropriate intervals in the circumferential direction, and their heads are attached to the inner side surface. The sealing material 7 is configured to be able to be pressed by a push bolt 9 that comes into contact with the sealing member 4 .

At the tip of the socket 2, there is a thick-walled tip 11 having a radial contact end surface 10 that can come into contact with the inner protrusion 5.
is formed. This distal end portion 11 is provided with a female threaded hole 12 extending in the tube axis direction from the abutting end surface 10 at an appropriate location in the circumferential direction. On the other hand, the inner protrusion 5
has a bolt through hole 13 facing the female threaded hole 12.
is provided through it. Numeral 14 is a fastening bolt that is screwed into the female threaded hole 12 through the bolt through hole 13 to fix the tip end 11 of the socket 2 and the inner protrusion 5 of the socket 1. In addition, the tip of socket 2 and socket 1
Tapered surfaces 15 and 16 are formed at the opening ends of the socket 1 to facilitate joining of the socket 1 and the socket 2.

Explain the joining work. First, the annular recess 3 of the socket 1
A sealing material 7 is fitted to engage the protrusion 6, and a press ring 8 with a push bolt 9 is fitted into the annular recess 3 portion on the back side of the sealing material 7. Next, socket 1
The insertion port 2 is inserted into the inside, and once the tip 11 passes over the sealing material 7, it is stopped. Here, the push bolt 9 is screwed out from the push ring 8, and the head of the push bolt 9 is brought into contact with the inner side surface 4, and the seal material 7 is compressed by the push ring 8. Then seal material 7
is strongly pressed against the bottom surface of the annular recess 3 and the outer surface of the insertion port 2, thereby achieving a sealing function.

When the setting of the sealing material 7 is completed, the insertion port 2 is further inserted, and the contact end surface 10 is brought into contact with the inner protrusion 5. In the pipe-in-pipe method, the new pipe is inserted into the existing pipe and pushed to the desired location. When the above-mentioned joint part is located at the target location of the existing pipeline, for example, at an irregularly shaped pipe section, the fastening bolt 14 passing through the bolt through hole 13 is inserted into the female threaded hole 1.
2 to integrally fix the tip 11 and the inner protrusion 5.

In this way, the socket 1 and the socket 2 are firmly fixed together, and, for example, in the case of irregularly shaped pipes using pipe-in-pipe construction, it is possible to ensure that the centrifugal force caused by the uneven force of water pressure and the flow velocity generated at the curved part is prevented. can be absorbed into.

As described above, according to the present invention, the socket and the socket can be integrally fixed to each other, which not only eliminates the need for conventional protective work on irregularly shaped pipes in the pipe-in-pipe construction method, for example. , workability is good because it can be integrated inside the pipe, and all accessories other than the fastening bolts can be used with ordinary pipe fittings.

[Brief explanation of the drawing]

The drawing is a sectional view of an embodiment of the present invention. 1...Socket, 2...Socket, 5...Inner projection, 7
... sealing material, 10 ... contact end surface, 11 ... tip, 12 ... female threaded hole, 13 ... bolt through hole,
14...Tightening bolt.

Claims (1)

[Scope of utility model registration request] A sealing material is provided between the inner surface of the socket and the outer surface of the socket,
A radially inward protrusion is provided in the socket portion on the back side of the sealing material, a radial abutting end surface that can abut on the inward protrusion is formed at the tip of the socket, and the tip A female threaded hole extending in the tube axis direction is provided from the abutting end surface at a suitable position in the circumferential direction of the tube, a bolt through hole opposite to this female screw hole is provided to pass through the inner protrusion, and the bolt is inserted through the bolt through hole. An integrated joint for joining inside a pipe, characterized in that it is provided with a fastening bolt that is screwed into a screw hole and fixes the tip of the insertion port and the inner protrusion of the socket.