JPH06137461A - Pipe connecting device - Google Patents

Abstract

PURPOSE:To facilitate connecting operation of pipes from the ground outside a cut groove in the case where a pipeline is laid inside the ditch which is dug on the ground. CONSTITUTION:A holding member 9 on an insertion port side is held at the outer peripheral surface of an insertion port 7 formed at the end of one pipe 4 to be connected. A taper ring member 8 having an inner circumferential tapered surface 28 for guiding insertion of the insertion port 7 into a receiving port 6 is held at the outer peripheral surface of the receiving port 6 formed at the end of the other pipe 3 to be connected. Wire ropes 35, 35 are stretched across the insertion port side holding member 9 on both sides and across the taper ring member 8 on both sides. Tension is applied to the wire ropes 35, 35 by a hydraulic jack 32 by operation from the ground 2 so that the insertion port 7 can be inserted into the receiving port 6 under guidance of the tapered surface 28. The holding member 9 on the insertion port side and the taper ring member 8 are lifted up to the ground after the connection therebetween is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joining device for joining pipes laid in grooves cut from the surface of the earth.

[0002]

2. Description of the Related Art In the case of laying a pipeline in a groove cut from the surface of the earth, conventionally, an operator enters the groove,
I often wire the two pipes to be joined and operate this wire rope with a lever block to pull the two pipes together.

[0003]

However, such conventional work in the open-cut groove has a problem that there is a danger of collapsing the groove, the working environment is extremely bad, and the operation requires skill.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve such a problem and make it possible for anyone to easily carry out the joining work from the ground surface outside the open cut groove.

[0005]

In order to achieve the above object, the present invention is to be held on the outer peripheral surface of an insertion opening formed at the end of one of the pipes to be joined and to release the held state. An insertion side holding member that can be pulled up to the ground surface and an inner peripheral taper that is held on the outer circumference of the receiving opening formed at the end of the other pipe to be joined and guides the insertion of the insertion opening into this receiving opening. A taper ring member that has a surface and that can be pulled up to the ground after releasing the holding state, and a pair of cords that are passed between both side portions of the insertion side holding member and both side portions of the taper ring member And, by applying a tension to these cords by an operation from the ground surface, the insertion side holding member and the taper ring member are pulled toward each other, so that the insertion port is guided to the inner peripheral tapered surface and is received in the receiving port. With a drive to insert That.

[0006]

In this structure, when the pipes are joined together, for example, the tapering member is lowered from the ground surface into the open cut groove and held in the receiving port of the existing pipe already laid in the groove. Next, the insertion side holding member is attached to the insertion port of the new pipe to be joined, and the new pipe is lowered from the ground surface into the groove. Next, the insertion opening is formed on the inner peripheral tapered surface of the tapering member. Then, a pair of cords are passed between both sides of the tapering member and both sides of the insertion side holding member, and the cords are connected to the drive device. Next, the drive device is operated by an operation from the surface of the earth to apply tension to the rope to draw the taper ring member and the insertion side holding member toward each other, and guide the insertion port to the inner peripheral tapered surface to receive it. Insert it in the mouth. Finally, the joining operation is completed by pulling up the insertion-side holding member, the tapering portion, the driving device, and the like to the ground surface.

[0007]

EXAMPLE In FIG. 8, reference numeral 1 denotes an excavation groove, which is excavated from the ground surface 2 to a predetermined depth. A pipe 3 has already been laid inside the excavation groove 1, and the next new pipe 4 is joined to the existing pipe 3. The existing pipe 3 is buried in the groove 2 so that the receiving port 6 at one end is exposed, and the receiving port 6 is installed so as to be joined to the insertion port 7 at the end of the new pipe 4. Receptacle 6
The taper ring member 8 is held on the outer surface of the
The insertion side holding member 9 is held on the outer surface of the.

1 to 3 show the detailed structure of the insertion side holding member 9. Here, 11 is an arc-shaped plate, and the insertion port 7
Placed on the upper surface of. Lateral support brackets 12, 12 are provided on both sides of the plate 11, respectively, and central portions of clamp hands 13, 13 are rotatably supported by the support brackets 12, 12, respectively. Support bracket 12,
A hydraulic jack 14 is provided between the ends of both clamp hands 13 on the upper side of 12. Therefore,
Clamp hand by expanding and contracting the hydraulic jack 14.
13 and 13 contact the surface of the insertion opening 7 and clamp the insertion opening 7 together with the plate 11 at three points in the circumferential direction, or release the clamped state. Each clamp hand 13, 13
Eye bolts 15 and 15 are attached to the positions corresponding to the horizontal center line of the insertion opening 7 in the above.

FIGS. 1, 2 and 4 to 7 show the detailed structure of the tapering member 8. This tapering member 8
The ring has a C-shaped saddle portion 17 placed on the upper part of the receiving port 6 and a pair of arc-shaped opening / closing portions 18, 18 rotatably connected to both ends of the saddle portion 17, respectively. It is formed into a shape and can be attached to and detached from the receptacle 6 by opening and closing the opening / closing portions 18, 18. A groove 19 is formed on the inner circumference of the saddle portion 17, and the taper ring member 8 is positioned with respect to the receiving opening 6 by fitting the groove 19 into the outer peripheral projection 20 at the opening end of the receiving opening 6. . The opening / closing portions 18, 18 are provided at positions that do not engage with the outer peripheral surface of the receiving opening 6.

Reference numeral 21 is an opening / closing mechanism for the opening / closing sections 18, 18. As shown in the drawing, a bracket 22 is provided on one opening / closing part 18, and a horizontal bar 23 is rotatably supported by the bracket 22. A fork-shaped stopper 24 is provided at one end of the bar 23. Convex stop members 25, 25 are provided at the open / close ends of the open / close parts 18, 18.
The opening preventing members 25, 25 are configured to overlap each other when the opening / closing portions 18, 18 are closed. Stopper
With the rotation of the bar 23, the bar 24 can hold the open / close parts 18, 18 in a closed state by sandwiching the overlapping stop members 25, 25 from both sides.

At the other end of the bar 23, a stopper 24 has an opening / closing section 18,
It is bent in an L-shape that becomes horizontal when 18 is held in a closed state, and a disc-shaped ring 27 is attached to the tip of the bent portion 26. This ring 27 is also
It is provided in the same direction as the bent portion 26. On the inner circumference of the tapering member 8, there is provided a taper surface 28 whose diameter gradually decreases from the opening side of the tapering member 8 toward the receiving port 6 side.
It is formed all around. As shown in FIG. 11, the minimum inner diameter of the tapered surface 28 is larger than the outer diameter D2 of the insertion opening 7,
Moreover, it is set to be smaller than the inner diameter D3 of the tube insertion port in the receiving port 6.

A hydraulic jack 32 for joining is attached to the top of the saddle portion 17 so as to expand and contract in the pipe axis direction toward the insertion port 7 side. A horizontal operating plate 33 is attached to the telescopic end of the jack 32, and both ends of the operating plate 33 are
Each of them extends to a position corresponding to the eyebolt 15 of the insertion side holding member 9. A pair of guide rollers 34, 34 are rotatably supported by utilizing hinges of connecting portions of the saddle portion 17 and the opening / closing portions 18, 18 on both sides of the tapering member 8. Wire ropes 35, 35 are hooked on the guide rollers 34, 34, respectively, and one end of each wire rope 35 is hooked on the end of the operating plate 33. Each wire rope 35
The other end of each is connected to each eyebolt 15 using a shackle 36.

In this structure, when the new pipe 4 is joined to the existing pipe 3 shown in FIG. 8, the taper ring member 8 is suspended from the ground surface 2 into the excavation groove 1 to receive the saddle portion 17. Place it on the mouth 6 and open / close the opening 1
8 and 18 are closed, the opening preventing member 25 is overlapped, and this is sandwiched by the stopper 24 so that the opening / closing portions 18 and 18 are kept in the closed state.

On the other hand, by attaching the insertion side holding member 9 to the new pipe 4 and operating the hydraulic jack 14, the clamp hand
Clamp this tube 4 with 13 and plate 11. And
As shown, the holding member 9 clamps the pipe 4 into the groove 1.
It is hung inside and the insertion opening 7 is brought close to the receiving opening 6 as shown in FIG. The hydraulic hoses 37, 37 for the respective jacks 14, 32 are guided from the groove 1 to the ground surface 2, and the jacks 14, 32 can be operated by an operating tool provided on the ground surface 2.

In this state, the jack 32 is operated in the contracting direction, and the wire rope 35 is hung over as shown in FIG. At this time, the wire rope 35 is connected to the insertion side holding member 9 in advance by the shackle 36 and the eyebolt 15, so that the wire rope 35 is simply hooked on the guide roller 34 and the operating plate 33 to complete the hanging work. To do. This hanging operation can be performed by inserting an appropriate operation rod into the groove 1 from the ground surface 2.

Next, the jack 32 is operated to operate the wire rope.
When tension is applied to 35 and the holding member 9 for insertion is pulled toward the taper ring member 8, the insertion port 7 is tapered as shown in FIG.
After being guided by 28 to become concentric with the socket 6, it is inserted into the socket 6. At this time, the force of the jack 32 is distributed to the pair of wire ropes 35, and substantially even parallel pulling forces are applied to both sides of the insertion side holding member 9, so that the insertion port 7 does not fall or the like. It is possible to join in a stable state. As a result, the joining of the pipes 3 and 4 is completed, but necessary members such as a sealing material are previously housed inside the receiving port 6.

After the joining is completed, as shown in FIG. 5, the operating rod 39 is inserted from the ground surface 2 into the groove 1 and the operating rod 39 is engaged with the ring 27 of the bent portion 26 of the bar 23 to fold the bent portion. 26 is rotated upward and the bar 23 is rotated to move the stopper 24 away from the stopper members 25, 25. As a result, the opening / closing part 18 will open due to its own weight.
35 is removed from the actuating plate 33, and the taper ring member 8 is lifted as shown in FIG.

In the insertion side holding member 9, the hydraulic jack 14 is operated to release the clamped state of the insertion port 7 by the clamp hand 13, and similarly lifted and taken out from the groove 1 to the ground surface 2 as shown in FIG. .

If it is not desirable to install the hydraulic jack 14 on the top of the pipe, such as when joining deformed pipes,
As shown in FIG. 12, the tapering member 8 can be held in the receiving port 6 in a state in which the tapering member 8 is rotated along the outer peripheral projection 20 within a range that does not come off from the receiving port 6.

FIG. 13 shows a modification of the tapering member 8. Here, the saddle portion 17 is formed in a U shape and has a pair of skirt portions 38 extending downward from both ends thereof. The opening / closing portion is not provided, and the taper ring member 8 is configured such that the lower half circumference thereof is open. With such a structure, the tapered ring member 8 can be held in the receiving port 6 only by dropping it from the ground surface 2 into the groove 1, and it is not necessary to operate the opening / closing portion or the opening / closing mechanism, so that the work can be easily performed. be able to. Similarly, the holding state can be released simply by lifting it toward the surface of the earth.

14 to 18 show a modified embodiment around the hydraulic jack 32 for joining. In the previous embodiment, the jack 32 was installed so as to expand and contract toward the insertion port 7, but here, the jack 32 is configured to expand and contract in the direction away from the insertion port 7. A chain 40 is used instead of the wire rope in the previous embodiment, and one end of the chain 40 is welded to the working plate 33. The chain 40 is hooked on a guide roller 41 provided on the base end side of the jack 32 and a guide roller 34 provided on the taper ring member 8 and then guided to the insertion side holding member 9.

In the case of this embodiment, as shown in FIG. 3, hooks 42, 42 for hooking the chain 40 are provided on the insertion side holding member 9 instead of or together with the eyebolt 15. Has been. 16 this hook
42 shows a state in which the chain 40 is hung on 42.

According to this structure, the chain 40 is hung on the guide rollers 41 and 34 and the hook 42 by an appropriate operating rod, and then the jack 32 is extended, similar to the case of the previous embodiment. The insertion port 7 is inserted into the receiving port 6. Figure 17
As shown in (a), when the pipe 4 on the insertion port 7 side is a deformed pipe, it is difficult to extend the jack 32 to the insertion port 7 side as in the embodiment of FIG. By reversing the extension direction of the jack 32 as in the example, the insertion opening 7 can be inserted into the receiving opening 6 without any problem as shown in FIG. In the embodiment shown in FIG. 1, a chain can be used instead of the wire rope 35.

18 to 22 show another modified embodiment around the hydraulic jack 32 for joining. Here, the jack 32 is installed upward from the top of the tapering member 8,
Stretches upwards. Further, in this embodiment, hooks 42 are provided not only on the insertion side holding member 9 but also on both ends of the actuating plate 33, and the chain 40 is hung on each hook 42.

When laying the new pipe 4, for example, as shown in FIG.
As shown in, the holding member 9 is held in the insertion opening 7 of the new pipe 4, and the chain 40 is attached to the hook of the holding member 9.
The new pipe 4 is suspended in the groove 1 by hanging one end side of the.
In addition, with the other end of the chain 40 hooked on the hook of the tapering member 8, the tapering member 8 is lowered into the groove 1 and held in the receptacle 6 of the existing pipe 3. When the chain 40 is loosened by bringing the new pipe 4 close to the existing pipe 3, the chain 40 may be re-attached by using the operation rod 43 as shown in FIG. 21, for example. The operating rod 43 can be suitably used also for other work of hanging and unfastening the chain 40.

As shown in FIG. 22 (a), for example, the socket 6
When the side pipe 3 is a deformed pipe, it is difficult to extend the jack 32 in the axial direction of the socket 6 as in the embodiment of FIG. However, by making the extension direction of the jack 32 upward as in the present embodiment, the insertion opening 7 can be inserted into the receiving opening 6 without any problem as shown in FIG.

FIG. 23 shows a modification of the insertion side holding member 9. Here, a plurality of protrusions 44 are provided at appropriate positions on the outer circumference of the insertion slot 4.
Is formed by casting or the like, and the insertion side holding member 9 is
It is composed of a lower open C-shaped member that fits into the outer periphery of the insertion slot 7 from above and engages with the protrusion 44. With such a structure, the clamping work by the hydraulic jack and the clamping hand becomes unnecessary, so that the easy work becomes possible.

[0028]

As described above, according to the present invention, the insertion side holding member that can be pulled up to the ground surface, the taper ring member that is held on the outer periphery of the receiving port and that can be pulled up to the ground surface, and the insertion side. A pair of ropes passed between the both sides of the holding member and both sides of the tapering member, and a tension is applied to these ropes by an operation from the ground surface to guide the insertion opening to the inner peripheral tapered surface. Since it is equipped with a drive device that is inserted into the receiving port, not only can anyone easily join the pipes from the surface outside the excavation groove, but also the force of the drive device is distributed to the pair of ropes. Since substantially even parallel pulling forces can be applied to both sides of the insertion-portion-side holding member, the insertion can be performed in a stable state without tilting or the like.

[Brief description of drawings]

FIG. 1 is a front view of a pipe joining device according to an embodiment of the present invention.

FIG. 2 is a plan view of the portion shown in FIG.

FIG. 3 is a side view of an insertion side holding member in FIG.

FIG. 4 is a side view of the taper ring member in FIG.

5 is a side view of a main part of the taper ring member of FIG.

FIG. 6 is a bottom view of the portion shown in FIG.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a view showing a usage state of the pipe joining device.

FIG. 9 is a diagram showing a usage state in the next stage of FIG. 8;

FIG. 10 is a diagram showing a usage state in the next stage of FIG. 9.

FIG. 11 is a front view illustrating the function of the taper surface of the taper ring member.

FIG. 12 is a front view showing a deformed and held state of a taper ring member.

FIG. 13 is a side view showing a modified example of the taper ring member.

FIG. 14 is a front view of a modified embodiment around the pipe joining jack.

15 is a plan view of an essential part of the portion shown in FIG. 14.

FIG. 16 is a diagram showing how the hook and the chain in FIGS. 14 and 15 are hooked.

FIG. 17 shows the operation of the modified embodiment shown in FIGS.
8 is a diagram showing the operation of the embodiment of FIG.

FIG. 18 is a front view of another modified embodiment around the jack for joining pipes.

19 is a side view of the portion shown in FIG. 18.

FIG. 20 is a diagram showing a usage state of the pipe joining device based on the embodiment of FIGS. 18 and 19.

FIG. 21 is a diagram for explaining the work of engaging the chain with the hook in the pipe joining device shown in FIGS. 18 to 20.

22 is a diagram showing the operation of the modified embodiment shown in FIGS. 18 and 19 together with the operation of the modified embodiment of FIGS.

FIG. 23 is a view showing a modified example of the insertion side holding member.

[Explanation of symbols]

 1 Open-cut groove 2 Ground surface 3 Pipe 4 Pipe 6 Receiving port 7 Inserting port 8 Taper ring member 9 Inserting side holding member 28 Tapered surface 32 Hydraulic jack for joining 33 Operating plate 34 Wire rope

Front page continued (72) Inventor Atsushi Maki 2-26 Ohamacho Amagasaki City, Hyogo Stock Company Kubota Mukogawa Factory (72) Inventor Atsushi Niiyama 2-26 Ohamacho Amagasaki City Hyogo Stock Company Kubota Mukogawa Works (72) Inventor Toshiyuki Yonezu 3-16-9 Kanda, Uchida, Chiyoda-ku, Tokyo Nihon Cast Iron Tube Co., Ltd.

Claims (1)

[Claims] 1. A device for joining pipes laid in a groove cut from the ground surface, which is held on an outer peripheral surface of an insertion opening formed at an end of one pipe to be joined. At the same time, the holding member is held on the outer periphery of the receiving opening formed at the end of the other pipe to be joined with the holding member that can be pulled up to the ground after releasing the holding state, and is inserted into this receiving opening. A taper ring member that has an inner peripheral tapered surface that guides the insertion of the mouth and that can be pulled up to the ground after releasing the holding state, and both side parts of these insertion side holding members and both side parts of the taper ring member. A pair of cords that are respectively passed between them, and by applying a tension to these cords by an operation from the ground surface, the insertion side holding member and the tapering member are pulled toward each other, so that the insertion port Guide it to the tapered surface and insert it into the socket A pipe joining device, comprising: a drive device.