JPS5856469Y2 - underwater pipe joint - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint for a liquid transport pipe installed underwater, particularly for a pipe body having a medium or large diameter.

In recent years, we have developed a wide range of applications, including cooling water equipment for thermal and nuclear power plants and diffusion discharge equipment for hot and cold wastewater generated during power generation, as well as cooling water intake equipment for chemical plants in general industries, seawater distillation equipment, and sewage drainage equipment. In equipment, etc., large-diameter transportation pipes are installed underwater, and the demand for this type of underwater piping is expected to continue to increase gradually.

In general, plumbing work underwater is much more difficult than work on land.

In other words, when connecting medium- to large-diameter pipes underwater, there are extremely important factors such as water depth, tidal current, visibility, bottom sediment, connection between the dipper and the work boat operator, the skill level of the dipper, and workability of the dipper depending on the water depth. Many factors influence this.

The present inventor first proposed an underwater pipe joint by fixing a fixed flange on one end of the pipe to be joined, a stopper on the other end of the pipe, and making the movable flange loosely interlock with the fixed flange and the movable flange. proposed an underwater pipe joint that facilitated the connection of pipe bodies underwater by connecting them with bolts through a packing (Jikko Sho 39).
(Refer to Publication No.-21479).

However, in order to match the bolt holes of the fixed flange and the movable flange with the above device, first, the pipe body to be connected and the movable flange that is loosely connected to the pipe body with a gap of generally 20 to 40 mm must be separately prepared. The position of the movable flange is adjusted by slightly rotating it vertically and horizontally in seawater using a crane ship's winch device.As the diameter of the pipe increases, the winch device that suspends it also becomes larger. However, it has been difficult to make fine adjustments within the range of 20 to 40 mm in such a large winch operation.

As a result, accidents such as a change in the position of the installed pipe, deformation of the joint, or injury to the diameter piper sometimes occur due to a slight adjustment error, and further improvements are necessary in order to maintain the function of the joint and prevent work-related accidents. was there.

The present invention is intended to solve the above-mentioned drawbacks of the conventional underwater pipe joint.One embodiment of the invention will be explained below with reference to the drawings. FIG. 2 is a cross-sectional view of a portion taken along line II-II in FIG. 3 is the end 1 of the tube body 1
The fixed flange 3 is welded so as to slightly protrude from the fixed flange 3, and the end 2a of the tube body 2 is fitted into the central hole of the fixed flange 3.

Reference numeral 4 denotes a ring-shaped stopper welded to the side circumference of the tube body 2, which faces the fixed flange 3.

This stopper 4 has a smaller diameter than the outer diameter of the fixed flange 3,
The right corner in the drawing may be chamfered.

Reference numeral 5 denotes a movable flange with a center hole (that is, a ring shape) loosely fitted around the tube body 2 with a gap of about 20 to 40 mm, and this has a plurality of bolt holes 6, 6 corresponding to the fixed flange 3. ...... is drilled.

Reference numeral 7 indicates hanging hooks 8, 8 provided at the top of the movable flange 5.
. . . is a banger pin protruding from the surface of the movable flange 5 on the fixed flange 3 side. In addition, when the movable flange 5 is suspended by the hanging hook 7, the movable flange 5 is arranged in a position such that it is pressed against the side circumferential surface of the stopper 4.

FIG. 2 shows a case in which two banger pins 8, 8 are provided at a position forming an isosceles triangle connecting these and the hanging hook 7.

9 is a gasket held between the fixed flange 3 and the stopper 4, 10°10... and 11.11...
. . . indicates the tightening bolts and nuts of both flanges 3 and 5.

The method of operating the underwater pipe joint according to the present invention is as follows: First, a main winch of a crane ship lifts a pipe body 2 on a barge fitted with a packing 9, and then a sub-winch of the crane ship lifts the pipe body 2 on a barge. Separately lift the movable flange 5 with its hanging hook 7, and while pressing the flange 5 against the side surface of the stopper 4, lower ends of the banger pins 8, 8... are placed on the side surface of the stopper 4. Adjust so that it is placed in pressure contact.

In this state, the sub winch is released, the main winch suspends the tube body 2 into the seawater, and the end portion 2a is inserted into the center hole of the fixed flange 3.

In such a case, the bolt holes 6, 6 of the movable flange 5...
... automatically come to the positions corresponding to the respective bolt holes of the fixed flange 3, so the fixed flange 3 and the movable flange 5 can be tightened via the gasket 9 with bolts 10°10... ...and oak) 11.11...
It can be easily tightened and integrated.

As described above, according to the present invention, the bolt holes of the fixed flange 3 and the movable flange 5 can be easily matched in correspondence with each other in the connection work of the pipe bodies underwater, and therefore the ease of operation and safety are improved. It brings many advantages such as shortening construction time.

In the underwater pipe joint of the present invention, the stopper 4 is not limited to a circular shape, but may be polygonal.

The number of banger pins 8, 8, . This is not an essential requirement, but in short, these banger pins 8, 8... are connected to the straight line connecting the hanging hook 7 and the center of the tube body 2 in FIG. On the other hand, if at least one is on the opposite side, an effect that meets the purpose of the present invention can be produced.

The pipe joint of the present invention is convenient in size when used for steel pipes, but it can also be used for concrete pipes, for example, since the main parts of the joint, namely the fixed flange 3, stopper 4, and movable flange 5, are suitable for use with steel pipes.
This can be applied if the part is made of steel.

Furthermore, in the method of operating the pipe joint according to the present invention, the position adjustment of the movable flange 5 can be carried out while the movable flange 5 is suspended in seawater, instead of being suspended above the sea surface as described above.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the underwater pipe joint according to the present invention, and Fig. 2 is a partial sectional view taken along the line II-II in Fig. 1. In the figure, 1 and 2 are pipe bodies, and 3 is a fixed Flange, 4 is a stopper, 5 is a movable flange, 6゜6... is a bolt hole, 7 is a hanging hook, 8, 8... is a banger pin, 9 is a packing, 10.10... . . . indicates a tightening bolt, and 11.11 . . . indicates a nut, respectively.

Claims (1)

[Claims for Utility Model Registration] 1. A fixing flange 3 is welded to the end 1a of a tube 1 so as to protrude slightly, and the end 2a of another tube 2 to be connected to the center hole of the fixing flange 3 is A stopper 4 having a diameter slightly smaller than the fixed flange 3 is fixedly provided along the circumference of the tube body 2, facing the fixed flange 3, and the tube body 2 is
A movable flange 5 with a central hole having a small gap with respect to the outer periphery is loosely fitted to the tube body 2, and a plurality of bolt holes 6, 6, corresponding to the fixed flange 3 are inserted into it. A hanging hook 7 is provided at the top of the flange 5, and hanger pins 8, 8 are provided on the surface of the flange 5 on the fixed flange 3 side.
. . . are protruded from each other, and the above hanger pins 8, 8.
... is on the side of the hanging hook 7 with respect to the horizontal plane including the center line of the tube body 2, and is a straight line connecting the hanging hook 7 and the center line of the tube body 2 in a vertical longitudinal cross-sectional view of the tube body 2. At least one of the movable flanges 5 is located on the opposite side to the fixed flange 3, and is arranged in such a position that when the movable flange 5 is suspended by the hanging hook 7, they are pressed against the side peripheral surface of the stopper 4, and the fixed flange 3 and This underwater pipe joint is provided with a gasket 9 to be inserted between a movable flange 5 and a movable flange 5. 2 Registered claim 1 in which the stopper 4 is ring-shaped
Submersible pipe fittings as described in section. 3. The underwater pipe joint according to claim 1, wherein the stopper 4 is polygonal. 4 The gap between the pipe body 2 and the center hole of the movable flange 5 is 20~
40 mm registered claim 1 or 2 or 3
Submersible pipe fittings as described in section. 5. The underwater pipe joint according to claim 1, 2 or 3, wherein the triangle connecting the hanger pins 8, 8 and the hanging hook 7 is isosceles. 6. The underwater pipe rear end according to registered claim 4, wherein the triangle connecting the hanger pins 8, 8 and the hanging hook 7 is isosceles. 7 Pipe bodies 1 and 2 are made of concrete, and fixed flange 3
The underwater pipe joint according to claim 1, wherein the stopper 4 and the movable flange 5 are made of steel. 8 Pipe bodies 1 and 2 are made of concrete, and fixed flange 3
The underwater pipe joint according to claim 4, wherein the stopper 4 and movable flange 5 are made of steel. 9 Pipe bodies 1 and 2 are made of concrete, and fixed flange 3
The underwater pipe joint according to claim 5, wherein the stopper 4 and the movable flange 5 are made of steel. 10. The underwater pipe joint according to claim 6, wherein the pipe bodies 1 and 2 are made of concrete, and the fixed flange 3, stopper 4, and movable flange 5 are made of steel.