JPH0742876A - Pipe connecting device - Google Patents

Abstract

PURPOSE:To facilitate the work of connecting pipes together by providing in the neck of the socket of a pipe end portion a saddle member which is freely fitted and removed and a connecting means which is driven and contracted to press an eccentric clamp roller into contact with the outer peripheral surface of a spigot. CONSTITUTION:To connect a new pipe 4 to an existing pipe 3, the new pipe 4 hoisted down by a crane or the like has its spigot 6 disposed coaxial with the socket 5 of the existing pipe 3. Next, a saddle member 7, a spigot holding member 8 and a connecting cylinder unit 9 are hoisted down from the ground and the saddle member 7 is fitted to the neck 5a of the socket 5 and the spigot holding member 8 is fitted around the outer peripheral portion of the spigot 6. Then the cylinder unit 9 is contracted to rotate an eccentric clamp roller 16 counterclockwise via a clamp lever 17, pressing the clamping surface of the roller 16 into contact with the outer peripheral surface of the spigot 6. Under these conditions, the cylinder unit 9 is further contracted to move the new pipe 4 toward the existing pipe 3 to insert the spigot 5 into the socket 5, thus completing connection of the pipes 3, 4.

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 Conventionally, when laying a pipeline in a groove cut from the surface of the earth, an operator enters the groove, puts a wire rope on both pipes to be joined, and uses a lever block or the like to wire this wire. I often work by pulling both pipes by operating a rope.

[0003]

However, the work in the conventional open-cut groove is accompanied by a risk of collapsing the groove, the working environment is extremely bad, and the work is often skillful.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a pipe joining apparatus which enables the joining work to be performed easily from the ground surface outside the open-cut groove even by an unskilled person.

[0005]

In order to solve the above problems, a pipe joining device of the present invention is a pipe joining device for joining pipes laid in grooves cut from the surface of the earth, A saddle member that can be inserted into and removed from the neck portion of the receiving port formed at the end of one of the pipes to be joined from the upper side, and is retained at the receiving port side, and formed at the end of the other pipe to be joined. An insertion opening holding member having a plurality of eccentric clamp rollers mounted to the outer peripheral portion of the insertion opening from above so as to be rotatable around the tangential axis of the pipe, and one end of which is connected to the saddle member. At the same time, the other end is connected to the rotating lever of the eccentric clamp roller, and is constituted by a holding and joining means that presses the eccentric clamp roller against the outer peripheral surface of the insertion opening during contraction driving.

[0006]

In the above structure, the saddle member is fitted to the neck portion of the receiving port of one pipe from above with respect to the pipes arranged so as to face each other on the same axis, and the outer periphery of the insertion port of the other pipe is fitted. The insertion port holding member is fitted into the portion from above. Then, when the holding and joining means is contracted and driven, the eccentric clamp roller is rotated by the rotation lever to press the clamp roller against the outer peripheral surface of the insertion opening, and the insertion opening holding member is fixed to the outer peripheral surface of the insertion opening. . Further, by driving the holding and joining means to contract, the other tube can be moved through the insertion hole holding member to fit the insertion hole into the receiving hole.

Therefore, the joining operation can be performed between the pipes by operating the joining device from the outside of the open-cut groove, and the joining operation can be easily performed even by an unskilled person. Moreover, since the holding / joining means can hold the insertion opening and move and insert the tube, the apparatus itself can be simplified and reduced in weight, and can be easily transported and handled.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pipe joining apparatus according to the present invention will be described below with reference to the drawings. In FIG. 6, reference numeral 1 denotes an excavation groove formed to a predetermined depth from the ground surface 2, and 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 open-cut groove 1 so that the receiving port 5 at one end is exposed, and the receiving port 5 is joined to the insertion port 6 of the new pipe 4. A saddle member 7 is held on the neck portion 5a of the receiving opening 5, and an insertion opening holding member 8 is held on the outer peripheral portion of the insertion opening 6. A pair of saddle members 7 and 8 are provided between the saddle member 7 and the insertion opening holding member 8. A hydraulic holding and joining cylinder device (holding and joining means) 9 is connected.

As shown in FIGS. 1 to 3, the insertion port holding member 8
Is provided on the outer peripheral portion of the insertion opening 6 of the new pipe 4 and is provided on the both sides of the half ring portion 11 at positions opposite to each other with the pipe axis O of the new pipe 4 interposed therebetween. And a pair of left and right holding roller portions 12 and a half ring body 11
Receiving seats 13 that come into contact with the outer peripheral surface of the insertion opening 6 are attached to the inner surface of the plate at three positions every 90 degrees.

As shown in FIG. 4, the holding roller portion 12 has an eccentric clamp roller 16 attached to a pair of roller brackets 14 attached to the half ring body 11 via a tangential support shaft 15. The eccentric clamp roller 16 has a drum-shaped clamp surface 16a formed along the outer peripheral surface of the insertion opening 6 over about a half circumference, and the piston rod 9a of the holding and joining cylinder device 9 is pin-connected to the opposite side of the clamp surface 16a. Clamp lever 17 for rotating the eccentric clamp roller 16 about the support shaft 15
Is projected. The clamp surface 16a has a center O
₁ is eccentrically attached to the axis O ₂ of the support shaft 15 by a distance L. Therefore, by rotating the eccentric clamp roller 16 in the direction of arrow A via the clamp lever 17, the clamp surface 16a is brought into pressure contact with the outer peripheral surface of the insertion opening 6, and the insertion opening holding member 8 is attached to the outer peripheral portion of the insertion opening 6. Can be fixed.

As shown in FIG. 5, the saddle member 7 is formed in a semi-ring shape that can be inserted into and removed from the neck portion 5a of the receiving port 5 of the existing pipe 3 from above, and has an inner diameter smaller than the outer diameter of the receiving port 5. In the fitted state, the movement toward the receiving port 5 side (outward in the axial direction) is regulated and prevented from coming off. Both ends of the saddle member 7 are
A cylinder bracket 1 which has a tapered guide surface 18 for guiding the fitting to the neck portion 5a on its inner surface, and which supports the main body 9b of the holding and joining cylinder device 9 via a pin.
9 is provided.

When the new pipe 4 is joined to the existing pipe 3 by using the pipe joining apparatus having the above-mentioned structure,
The insertion port 6 of the new pipe 4 suspended by a crane is arranged on the same axis so as to face each other, and the saddle member 7 and the insertion port holding member 9 from the ground surface 2 together with the holding and joining cylinder device 9 are excavated and grooved 1
The saddle member 7 is hung inside and the saddle member 7 is fitted into the neck portion 5a of the receiving opening 5 from above, and the insertion opening holding member 9 is fitted into the outer peripheral portion of the insertion opening 6 from above. At this time, the holding and joining cylinder device 9 is in the advanced state, and the eccentric clamp roller 16 is in the unclamped state in which the clamp lever 17 is shown by the solid line in FIG.

Next, when the holding and joining cylinder device 9 is contracted synchronously, the eccentric clamp roller 16 is rotated in the direction of arrow A via the clamp lever 17, and the clamp surface 16a is pressed against the outer peripheral surface of the insertion opening 6. And holding member 9
Is firmly fixed to the outer peripheral portion of the insertion slot 6.

When the tightening force is further fixed, the holding and joining cylinder device 9 is contracted synchronously, the new pipe 4 is moved to the existing pipe 3 side, the insertion port 6 is inserted into the receiving port 5, and the existing pipe 3 is moved. The insertion opening 6 of the new pipe 4 is fitted into the receiving opening 5 of the above and is stopped at a constant swallowing amount. As a result, the joining of the tubes 3 and 4 is completed. It should be noted that necessary members such as a sealing material are previously stored inside the receiving port 5.

After the joining is completed, the holding and joining cylinder device 9 is slightly advanced, and the eccentric clamp roller 16 arrow B is shown.
By rotating in the direction, the clamp is released and the saddle member 7 is also loosened, so that the saddle member 7 and the insertion port holding member 9 are held together with the holding and joining cylinder device 9 in the pipe 3,
4 is lifted from the open-cut groove 1 and carried out.

According to the above embodiment, the joining device can be operated from the outside of the cut groove 1 to perform the joining work between the pipes 3 and 4, and the joining work can be easily performed even by an unskilled person. . Moreover, only by driving the pair of holding and joining cylinder devices 9, the insertion holding member 9 can be fixed to the outer peripheral portion of the insertion opening 6 and the new pipe 4 can be moved and inserted to the existing pipe 3 side. Since the pipes 3 and 4 can be joined to each other, the device itself can be simplified and made lighter in weight as compared with the case where both the clamp device and the joining device are provided in the device, and the transportation and handling are easy. Easy to do.

[0017]

As described above, according to the present invention, a saddle member which can be freely inserted into and removed from the upper end of a neck of a receiving end of a pipe end and a plurality of eccentric clamp rollers are provided to hold the insertion opening. Since the holding and joining means that presses the eccentric clamp roller against the outer peripheral surface of the insertion port by contraction drive is provided between the member and the clamp lever, the contraction drive of the holding and joining means first holds the insertion opening through the eccentric clamp roller. The member can be fixed to the outer peripheral portion of the insertion opening, and one of the tubes can be moved to fit the insertion opening into the receiving opening of the other insertion opening.

Therefore, the joining operation can be performed between the pipes by operating the joining device from outside the digging groove, and the joining operation can be easily performed even by an unskilled person. Moreover, since the holding / joining means can hold the insertion opening and move and insert the tube, the device itself can be simplified and reduced in weight, and can be easily transported and handled.

[Brief description of drawings]

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

FIG. 2 is a side view of the pipe joining device.

FIG. 3 is a sectional view taken along line I-I shown in FIG.

FIG. 4 is a side view showing an eccentric roller of the pipe joining device.

5 is a sectional view taken along line II-II shown in FIG.

FIG. 6 is an overall side view showing a pipe joining operation by the pipe joining device.

[Explanation of symbols]

 1 Open-cut groove 2 Ground surface 3 Existing pipe 4 New pipe 5 Receiving port 5a Neck part 6 Inserting port 7 Saddle member 8 Inserting port holding member 9 Holding and joining cylinder device (joint holding means) 11 Half ring body 12 Holding roller part 15 Support shaft 16 Eccentric clamp roller 16a Clamping surface 17 Clamp lever

Claims (1)

[Claims] 1. A pipe joining device for joining pipes laid in a groove cut from the surface of the earth, wherein a neck of a socket formed at an end of one pipe to be joined is from above. A saddle member that can be fitted and removed, and that is retained on the receiving side, and an outer peripheral portion of the insertion port formed at the end of the other pipe to be joined can be freely inserted and removed from above, and the tangential axis of the pipe An insertion hole holding member having a plurality of eccentric clamp rollers mounted rotatably around the center, and one end connected to the saddle member and the other end connected to a rotation lever of the eccentric clamp roller to drive contraction. A pipe joining device, characterized in that it is constituted by holding joining means for pressing the eccentric clamp roller against the outer peripheral surface of the insertion port.