JPH0154595B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for joining pipe bodies such as gas pipes.

Generally, to join a pipe body such as a gas pipe, as shown in FIG.
The flange 1b of the existing pipe 1 and the tightening flange 6 are integrally connected with the bolts 7, with the back-up spring 3, O-ring 4 and square rubber 5 sandwiched between the flange 1b and the tightening flange 6. Therefore, after inserting the back-up spring, it is necessary to push in the O-ring 4 using an inserter. At this time, if the load is not applied evenly to the O-ring 4, the specified final torque (for example, 900 kg cm)
If the results were not obtained and were incomplete, it had to be redone.

The conventional inserter inserts the flange 1 of the existing pipe 1.
The bolt is inserted between the bolt hole 1b' of b, and the O-ring 4 etc. is pushed in while tightening it, so in order to push it in evenly as mentioned above, it is necessary to place it on the flange. Of the multiple bolts, the diagonal bolts must be tightened alternately, and this work is not only laborious and time-consuming, but it is also easy to omit this work, resulting in incomplete joints. There were flaws.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and its purpose is to reduce the labor and work time of pushing the O-ring with an inserter, and to eliminate rework due to poor installation. An object of the present invention is to provide a new pipe joining device that can reduce the amount of water used.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 2A to 2C, 8 is an inserter, which is divided into semicircular shapes on the left and right sides of the connecting pin 8a, and when fitting into the mounting tube 2, the connecting pin 8b
They are bonded in a cyclic manner. A protrusion 8' is formed on both sides of the inserter 8, and a guide hole 8c is bored in the protrusion 8'.
A slide rod 9 is inserted into it. The slide rod 9 is also inserted into a bolt hole 1b' of the flange 1b of the existing pipe 1, and a support 10 is further inserted over the end of the slide rod 9 extending from the bolt hole 1b'. ing.

The lower end of the actuating arm 11 is pivotally attached to the outside of the support 10, and the actuating arm 11 is pivoted about this fulcrum. The upper parts of the left and right operating arms 11 are bent inwardly and housed integrally in a holder 12.
A grip 13 is attached to the holder 12.

A linkage 14 is located in the middle of the operating arm 11.
One end of the linkage 14 is pivotally connected, and the other end of the linkage 14 is pivotally connected to the end surface of the protrusion 8' of the inserter 8 by a stud knob 15, and a three-bar slide mechanism is connected between the slide rod 9 and the operating arm 11. It consists of

Since the pipe joining device of this embodiment is constructed as described above, when pushing in the O-ring 4, first open the inserter 8 with the stud knob 15 and coupling pin 8b removed, and then install it. Fit into pipe 2. Next, the slide rod 9 is sequentially inserted into the bolt hole 1b' of the flange 1b of the existing pipe 1 and the guide hole 8c of the inserter 8, and the stud knob 15 is screwed onto the end surface of the protrusion 8' of the inserter 8 as shown in the figure. Set it like this.

In this state, when the grip 13 is grasped and the actuating arm 11 is rotated in the direction of the arrow in FIG. and the inserter 8 via the linkage 14.
Pull in the direction of the arrow. While the inserter 8 slides along the slide rod 9, its pushing portion 8d enters into the enlarged diameter end portion 1a of the existing pipe 1,
Push the O-ring 4 inside. In addition, if the O-ring 4 is difficult to insert just by pulling or pushing the grip 13 as described above, repeat the push and pull operation of the grip 13, or in some cases, push it in by hitting it with a reaction. I can do it.

When the pushing work is completed, remove the stud knob 15, pull out the slide rod 9, and then remove the connecting pin 8.
After removing inserter 8 from mounting pipe 2 by removing b, move square rubber 5 and tightening flange 6 to the joining position, and finally tighten tightening flange 6 with tightening bolt 7 to complete the connection. Complete.

Figures 3A and 3B show another embodiment,
The difference from the above embodiment is that instead of connecting the tip of the linkage 14 to the protrusion 8' of the inserter 8 by means of a stud knob 15, a locking piece 1
6 engages with the protrusion 8'. Incidentally, since the locking piece 16 has a hole 16a through which the slide rod 9 is inserted, the locking piece 16 will not come off the protrusion 8'.

Therefore, in this embodiment, the linkage 14 can be quickly attached or detached, so there is an advantage that the work can be carried out efficiently.

Moreover, FIG. 4 shows yet another embodiment,
The distance between the left and right operating arms 11 can be freely changed using the adjuster frame 17, and the adjuster pin 17
Since it is designed to be easily fixed by a,
It has the advantage that it can be freely adjusted according to various pipe diameters and can always be used in the optimum condition. In the first embodiment as well, the distance between the actuating arms 11 within the holder 12 can be freely adjusted.

FIG. 5 shows yet another embodiment of the present invention, in which the linkage 14 of the above embodiment is constructed to have approximately the same size as the operating arm 11, and a double-threaded jack 18 is disposed between them. This allows a push-in operation. Therefore, this device can provide a very large pushing force and is particularly suitable for large diameter pipes.

In each of the above embodiments, one point on each side of the inserter 8 is used as the point of action, but the present invention is not limited to this, and it is possible to use two or three points as the points of action. You may also do so.
In this case, it is preferable to arrange the points of action symmetrically.

For example, as shown in FIG.
The same link mechanism (actuating arm 11' and linkage 14') as the link consisting of 1 and linkage 14 is constructed in parallel thereon, and the actuating arms 11 and 11'
Connect the grip rod 19 to the upper end of the support 1
0 and 10' are brought into contact with the flange 1b, and the tips of the linkages 14, 14' are brought into contact with the locking pieces 16, 1.
By locking the grip rod 19 to the inserter 8 with the handle 6', when the grip rod 19 is grasped at an appropriate position by hand and pulled from the solid line position to the imaginary line position, the inserter 8 is locked.
can be pushed simultaneously with equal force at two points on each side. If sufficient force cannot be generated just by gripping the grip rod 19, attach a movable slip (not shown) to the grip rod 19, insert a suitable rod into the slip, grip it, and push it in. But that's fine.

In addition, in any of the above embodiments, the flange 1
A slide rod 9 is inserted between the guide hole 8c of the inserter 8 and the guide hole 8c of the inserter 8, but this slide rod 9 may be omitted. In this case, support 1
0, the locking piece 16, etc. can freely move in the circumferential direction of the flange 1b and the inserter 8, so the grip 13 can be rotated from side to side around the tube and pressed in more or less without straining.

Further, as a means for pivotally connecting the linkage 14 to the inserter 8, as shown in FIG. cutout 14
a may be engaged.In this case, the linkage 14 can be quickly attached and detached, which has the advantage of improving work efficiency.

As described above, the pipe joining device of the present invention uses a link mechanism to operate the inserter, so compared to conventional methods, the working time can be shortened and the labor of the worker can be reduced. In addition, it is possible to reduce the rate of defective joints, and the device is lightweight and easy to handle.

[Brief explanation of drawings]

Figure 1 is a half-sectional view showing the joint state of the pipes, Figure 2A
The figure is a front view showing one embodiment of the pipe joining device of the present invention, FIG. 2B is a side view thereof, FIG. 2C is a top view taken along line C-C in FIG. 2B, and FIG. 3A is a second embodiment. , FIG. 3B is a top view thereof, FIG. 4 is a perspective view of the third embodiment, FIG. 5 is a perspective view of the fourth embodiment, and FIG. 6 is a diagram explaining the joining action by the double link mechanism. , FIG. 7 is a diagram showing a modified example of the linkage pivoting means. 1... Existing pipe, 1a... Expanded diameter end, 1b... Flange, 1b'... Bolt hole, 2... Mounting pipe, 2a... End,
3...Backup spring, 4...O-ring, 5...
Square rubber, 6... Tightening flange, 7... Tightening bolt, 8
... inserter, 8'... protrusion, 8a... connecting pin,
8b...Connecting pin, 8c...Guide hole, 8d...Pushing part, 9...Slide rod, 10...Support, 1
1, 11'... Operating arm, 12... Holder, 13
...Grip, 14,14'...Linkage, 15...
Stud knob, 16, 16'...locking piece, 17...adjustment frame, 17a...adjustment pin, 1
8...Double-threaded jack, 19...Grip rod.

Claims (1)

[Claims] 1. An inserter for pushing an O-ring between the joint between the existing pipe and the attached pipe, an actuation arm that rotates by taking a reaction force from the flange of the existing pipe, and a connection between the actuation arm and the inserter. A tube joining device comprising a linkage forming a linkage mechanism between the actuating arm and the actuating arm.