JPS60164091A - Expansion displacement pipe joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a telescopic displacement pipe joint for power generation penstock pipes, dam water discharge pipes, pipelines, and water and sewerage pipes.
p! It is suitable for fittings for pipes buried in concrete or laid at the bottom of water.

[Prior art]

An example of a conventionally used pipe joint will be explained with reference to FIG. A cylindrical sleeve coupling (3) is provided to surround the outside of the opposing ends, and a sealing stopper (41, (4)) is fixed to the inner surface of the coupling, and a rib (5) is attached to the outer surface of the sleeve coupling (3). ), (5) are fixed to the inner surface of the sleep coupling (3) and the tube (1).

Packets (6) and (6) are inserted between the outer surface of (2) and the outer surface of (2).

Furthermore, the packing holders (7) and (71) are inserted from the outside. Then, by rotating the bolt (8) provided between the rib (5) and the packing holder, the packing holder (7) is connected to the sleeve coupling ( 3), the seal (6) will be moved between the seal stopper (4) and the seal retainer (7).
The pipes (11, (2+) and the sleeve coupling (3) are tightened to maintain watertightness between them.

This conventional pipe joint is installed in a concrete block (91) as shown in FIG.

When used in (2), the sleeve coupling (3
), the seal (7), and the bolt (8) are restrained by the surrounding concrete IJ-t and cannot move, making it impossible to perform the function of a pipe joint that can expand and contract. In addition, since maintenance cannot be performed from the inside of the pipes (1) and (21),
．． It was impossible to tighten or replace the packing (6).

Fig. 3 shows another example of a conventionally used pipe joint, in which a cylindrical sleeve (IcI is provided and a sleeve α
Fully insert the packing aυ, αυ between the inner surface of both ends of O and the outer surface of the tube fil, (2+), and insert the packing αυ.

When the packing holders (2) and (A) are placed on the outside of αη and the packing holders @ and ＠ are moved toward each other by pressing ■ on the presser bolt, the packing αυ becomes W(t+).

(2) Watertightness between the sleeve Ql and the sleeve Ql is maintained.

The conventional pipe joint shown in Fig. 5, like the one shown in Fig. 1, does not function as a telescopic displacement pipe joint when buried in a concrete block, resulting in an increase in the packing aυ. It had the disadvantage that it could not be tightened or replaced.

Figure 84 shows yet another example of a conventionally used pipe joint, in which both ends of the bellows (141) are connected to the pipe (1).

The covers (11, (4) fixed to the inner surface of the end of the tube (2) and the outer surface of the end of the tube (11, (2)) are fitted together to protect the outer surface of the bellows 04. fil, (2
A connecting bolt Q81-e is attached between the ribs aη and αη that are fixed to the outer surface of the end of 1.

When the conventional pipe joint shown in Fig. 4 is used for a pipe buried in concrete, it is difficult to insulate it from the surrounding concrete and is easily restrained by the concrete.
It is not possible to adapt to the misalignment of 2+, and the bellows (1
4) There was a drawback that water flow resistance was large due to turbulence of water flow inside.

[Purpose of the invention]

It is an object of the present invention to provide an expansion/contraction displacement pipe joint that can adapt to expansion/contraction and displacement when used as a joint for concrete IJ-to-buried pipes or underwater pipes, and allows maintenance work to be performed from the inside of the pipe. be.

[Structure of the invention]

In order to achieve the above object, the present invention includes a cylindrical sleeve coupling surrounding the outsides of opposite ends of two pipes, and a sleeve coupling having two ends formed at both ends of the sleeve coupling.
a flange close to the outer circumferential surface of the pipe, an insulating material covering the outer surface of the sleeve cup link, a sub-seal packing attached to the tip of the flange and tightly abutting the outer circumference of the pipe, and an inner surface of the flange and the outer circumference of the pipe. Main/-lupa 7ki: y and interposed in contact with the surface.

The main seal packing is configured as a telescopic displacement pipe joint including a packing pressing means for pressing the main seal packing against the inner surface of the flange and the outer circumferential surface of the pipe.

〔Example〕

Next, one embodiment of the present invention will be described with reference to FIGS. 5 and 6.

The ends of the tubes (1) and (2+) to be connected are arranged so as to face each other, and a cylindrical sleeve coupling fence surrounds the outside of the ends of the tubes (11, (21).

Flanges Qυ are formed at both ends (left and right ends in Fig. 5) of the sleeve coupling (A), and the tips of the flanges Qυ are close to the outer peripheral surfaces of the tubes (11 and (21) and are connected to the sub-seals attached here. Patsukin (I) is.

The tubes (1) and (21) are in close contact with the outer peripheral surfaces of the tubes (1) and (21).The outer surface of the sleeve coupling wire is coated with an insulating material wire such as bituminous material, and the sleeve coupling link (A)
The movement of the sleeve canopy ring is not restricted by the concrete block (91). In Figure 5, the trout is covered with a concrete block (91).
1, (91 seams.

A ring-shaped main seal packing is interposed on the inner surface of the flange 121) of the sleeve coupling (A).

The inner surface of the flage Qυ is in contact with the outer circumferential surface of the tubes (11, (21). The gap (hole) between the pipes (1) has small dimensions.

(2) Pass through the gap (A) between the main seal packing (
C) can be put in and taken out.

A ring-shaped main seal seal holder (goods) is placed on the back of the main seal seal (c), and a wedge is inserted into the back of the main seal, and another wedge is inserted into which the tightening bolt is inserted. (to) is provided so as to come into contact with the wedge (e). These main seal padskin presser wires, wedge wires, (
A), the tightening bolt holder constitutes the suppression means for the main seal packing (c), and the tightening bolt holder is tightened to form a wedge)
, When the arrowhead approaches, the wedge hood (c) is pushed open from side to side,
The main seal packing (A) is attached to the inner surface of the flange Qυ and the pipe (11, (2) by the main seal packing Oshiko Co., Ltd.).
It is possible to maintain watertightness between the pipe (11, (21) and the sleeve coupling frame. A gap cover plate 1130 is attached to the inside of the wedge (2). There is.

A cover plate (3υ is a segment-shaped one divided at a required pitch in the circumferential direction, for example, is attached to each set of wedge-shaped suppression devices one by one through tapped holes to form a ring shape, or the installation is done by Spread out a strip of spiral shape with an arc smaller than the actual condition and attach it to the wedge-shaped pressing device through the tag hole.In this case, cover-grate 01
Hole 1 is an elongated hole so that its position can be adjusted.

In the above-mentioned pipe joint, if the pipes (11, (21) expand or contract or the center lines do not match, the main 7
- Lupa Sokin (C) transforms and adapts to this L. In addition, since the outer surface of the sleeve coupling (1) is covered with an insulating material and its movement is not restricted by the concrete block (9), the sleeve coupling can also move around the pipes H1 and (
21 displacements can be accommodated.

When retightening the main seal seal (c),
An operator may enter the pipes (11, (21) and turn the tightening bolts to bring the wedges closer together.

When replacing the main knoll packing (c).

The worker is trying to replace the pipe (11, (enter inside 21 and remove the gap cover plate 00, then remove the tightening bolt holder and wedge), (2) and remove the main seal packing holder). All at once, move it to the side opposite to the seal gasket (c) and remove one main seal gasket (c) from the gap (1) using a suitable tool. At this time, since the subsole packing (A) maintains the water sound properties,
Even if external water pressure is applied, large water leaks can be prevented.

When inserting a new main seal gasket (2),
Just do the reverse of the above.

The above-mentioned pipe joint can be used not only when the surrounding area is made of concrete, but also for pipes laid on the bottom of water, such as on the seabed, on the bottom of the water, or in pond dragons.

〔Effect of the invention〕

The present invention can be used as a telescopic displacement pipe joint for concrete-buried pipes and underwater pipes, and has the effect of allowing the packing to be retightened or replaced from the inside of the pipe.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of an example of a conventional pipe joint, and Figure 2 is a vertical cross-sectional view of an example of a conventional pipe joint.
Figure 6 is a vertical cross-sectional view showing the pipe joint buried in a concrete block, Figures 6 and 4 are side views showing other examples of conventional pipe joints with the upper half cut away, and Figure 5 is the main part of the pipe joint. A partial vertical side view of one embodiment of the invention, FIG. 6 is Vl- of FIG.
It is a VI sectional view. (11, [21Fi pipe, (4) is sleeve coupling, Qυ is flange, @ is subnor/gusokin, (c)
(c) is the insulating material, (c) is the main seal packing, @ is the main seal packing holder, (e), the crest is a wedge, and the ridge is a tightening bolt. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) A cylindrical sleeve coupling that surrounds the outsides of opposing ends of two pipes, flanges formed at both ends of the sleeve coupling whose tips are close to the outer peripheral surfaces of the two pipes, and the sleeve coupling. an insulating material covering the outer surface of the flange, a sub-seal packing attached to the tip of the flange and closely abutting the outer circumferential surface of the tube, and an intervening sub-seal packing that abuts the inner surface of the flange and the outer circumferential surface of the tube. A telescoping displacement pipe joint comprising: a main seal packing; and packing pressing means for pressing the main seal packing against the inner surface of the flange and the outer circumferential surface of the pipe.