JP3139931B2 - Piping connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting apparatus for connecting pipes laid in a trench cut from the ground surface.

[0002]

2. Description of the Related Art Conventionally, when laying pipes for water supply, gas, etc. in a trench cut from the surface of the ground, an operator enters the trench and uses a wire rope, a lever block, etc. for both pipes to be joined. Then, by operating this wire rope, both pipes are drawn and joined in many cases. But,
The operation in such a conventional cutting groove involves a risk of collapse of the cutting groove, the working environment is extremely poor, and the work often requires skill.

[0003] Therefore, there has been proposed a pipe joining apparatus which can easily perform joining work from a ground surface outside a cut groove without a skilled person. That is, as shown in FIG. 5, two pipes 16 and 17 to be joined are laid in a cut groove 15 formed at a predetermined depth from the ground surface 14.
A fixing ring 19 is locked near 8. A half ring-shaped movable ring 22 and a locking ring 23 are fitted to the vicinity of the receiving port 20 and the neck 21 of the other pipe 16 from above. The fixed ring 19 and the movable ring 22 are connected by a flexible connecting body 24 such as a chain, and the movable ring 22 is actuated by a pair of left and right hydraulic cylinders 25 serving as pulling means connected to the back of the locking ring 23. Rod 2
6 are connected.

FIG. 6 is a side view of a main part of the pipe joining apparatus, and FIG. 7 is a perspective view of a main part of the pipe joining apparatus. In the configuration shown in FIGS. 5 to 7, the movable ring 22 is drawn by operating the hydraulic cylinder 25, and the fixed ring 19 connected to the movable ring 22 is drawn, and therefore, the pipe 17 holding the fixed ring 19 is locked. Is drawn in the direction of the other pipe 16, and the insertion port 18 is inserted into the receiving port 20 of the pipe 16 to perform pipe joining. When the pipe connection is completed, the hydraulic cylinder 25, the locking ring 23, the movable ring 22, and the fixed ring 19 are removed upward. The fixing ring 19 is openable / closable by pivotally connecting a pair of right and left arc pieces, so that upward pulling-out does not cause any trouble.

[0005] The above-described pipe joining apparatus can join the pipes 16 and 17 by operating from the outside of the cut groove 15.
The joining work can be done easily even by non-experts.
This is useful because the device for joining can be easily attached and detached.

[0006]

However, the conventional pipe joining apparatus has the following problems. That is,
When there is a difference between the pulling forces of the left and right hydraulic cylinders 25, or when the insertion port 18 is inserted obliquely into the receiving port 20,
Further, in a case where the pipe 17 having the insertion port 18 is bent, for example, as shown in FIG. 8, the entire device for joining is inclined, and the insertion port 18 cannot be inserted into the receiving port 20 normally. In addition, poor bonding occurs.

An object of the present invention is to provide a pipe joining apparatus which can normally and smoothly join an inlet and a receiving port of a pipe while paying attention to the above-mentioned conventional problems.

[0008]

In order to achieve the above-mentioned object, a pipe joining apparatus according to the present invention is an apparatus for joining two pipes by inserting an insertion port into a receptacle, and fitting the two pipes into one pipe. Flexible ring Semi-movable movable ring, pulling means for pulling this movable ring, and freely attachable to the other pipe, and
A fixed ring connected to the movable ring by a connector is provided, and a spacer is formed inside the movable ring.

[0009]

In the above construction, by pulling the movable ring by the pulling means, the fixed ring connected to the movable ring is pulled, and the pipe on which the fixed ring is mounted is drawn to insert the insertion opening into the receptacle. Since the movable ring has the spacer, the movable ring does not tilt when it is pulled, and accordingly, the fixing ring does not tilt, and the insertion opening of the pipe is smoothly inserted into and joined to the receiving opening without tilting.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipe joining apparatus according to an embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is a first pipe having a receiving port 2 and 3 is a second pipe having an insertion port 4. A movable ring 5 having a semi-cut link is fitted near the receiving port 2 of the first pipe 1, and a locking ring 7 also having a semi-cut ring is fitted to the neck 6. A pair of right and left circular arc pieces are pivotally connected to each other, and an openable and closable fixing ring 8 is fitted thereto.
Regulates the movement in the pipe axis direction. A pair of left and right hydraulic cylinders 10 are connected to the back of the locking ring 7,
The operating rod 11 of the hydraulic cylinder 10 is connected to the movable ring 5. The movable ring 5 is connected to the fixed ring 8 by a connecting body 12 such as a plurality of chains. These configurations are the same as in the above-described conventional example.

The feature of this embodiment lies in the structure of the movable ring 5. That is, the ring-shaped movable ring 5 is formed so that the diameter thereof is slightly larger than the outer diameter of the first pipe 1, and a pair of right and left spacers 13 protrude at least inside the vicinity of both ends. ing. And this spacer 13
Is formed of a hard resin.

In the above configuration, the mounting of the movable ring 5, the locking ring 7, and the fixed ring 8 on the pipes 1 and 3 and the operation of the hydraulic cylinder 10 are the same as those in the above-described conventional example.
The description is omitted.

In this embodiment, when the insertion port 4 of the pipe 3 is inserted into the receiving port 2 of the pipe 1, a pair of hydraulic cylinders 1
If there is a difference in the force of 0 or the insertion port 4 of the second pipe 3
When the movable ring 5 is inclined and inserted, the movable ring 5 does not tilt because the respective spacers 13 are in contact with the outer periphery of the first pipe 1.
Pulls the fixing ring 8 through the connecting body 12 such as a chain without tilting. Therefore, the second pipe 3 fitted with the fixing ring 8 has its insertion port 4 as shown in FIG.
Are smoothly inserted into the receiving port 2 and aligned with the pipe axis of the first pipe 1. In particular, even if the second pipe 3 is a deformed pipe, for example, a pipe near the insertion port 4 has a bend,
Can be normally and smoothly inserted into the socket 2 and joined.

Spacer 13 in movable ring 5
Is formed of a hard resin,
Even when the spacer 13 is strongly rubbed against the outer peripheral surface of the first pipe 1 when the movable ring 5 is pulled by the cylinder 10, the outer peripheral surface of the first pipe 1 is not damaged, and the protection of the pipes is prevented. It is advantageous.

As described above, in the pipe connection device of the present embodiment, the movable ring 5 functioning as a pulling pipe is provided with the hard resin spacer, so that the connection of the pipe can be smoothly and normalized. Also, there is no damage to the piping. Of course, the joining operation can be easily performed without an operator entering the cut groove.

Although the movable ring has a pair of left and right spacers in the embodiment, the number thereof may be increased. Further, the fixing ring is not limited to the illustrated structure, and the chain may be replaced with a connecting rod or the like. Further, although a hydraulic cylinder is used as the tension means, a mechanical tension mechanism may be used.

[0017]

As is clear from the description of the above embodiment,
A pipe joining apparatus according to the present invention includes a movable ring having a half-ring shape that can be fitted into one of the pipes, a pulling unit that pulls the movable ring, and a movable body that can be attached to the other pipe and that is connected to the movable ring by a connector. A fixed pipe is provided with a fixed ring and a spacer is formed inside the movable ring, so that the movable ring is prevented from being inclined by the spacer that comes into contact with the outer periphery of the pipe when the movable ring is pulled, and the fixed ring is tilted. In this case, the pipe can be pulled in the axial direction of the pipe, and the insertion port of the pipe can be normally and smoothly inserted into the reception port of the other pipe, and can be joined, so that the joining failure does not occur. Further, since the spacer is formed of a hard resin, the piping is not damaged and its value is great.

[Brief description of the drawings]

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

FIG. 2 is a top view showing a pipe connection state of the pipe connection device.

FIG. 3 is a perspective view of the pipe joining device.

FIG. 4 is a front view of a movable ring portion in the piping connection device.

FIG. 5 is a cross-sectional side view of a conventional pipe joining device.

FIG. 6 is a side view of the pipe joining device.

FIG. 7 is a perspective view of the pipe joining device.

FIG. 8 is a top view showing an example of a joining state of the pipe joining device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st piping 2 Inlet 3 2nd piping 4 Insertion port 5 Movable ring 6 Neck 7 Locking ring 8 Fixing ring 9 Protrusion 10 Hydraulic cylinder 11 Operating rod 12 Connecting body 13 Spacer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-137461 (JP, A) JP-A-6-137462 (JP, A) JP-A-7-42876 (JP, A) 117074 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 1/024

Claims (2)

(57) [Claims] An apparatus for joining a pipe having a receiving port and a receiving port of a pipe having an insertion port to an insertion port, wherein a movable ring having a half-ring shape, which can be freely fitted to one of the pipes, and the movable ring. Tensile means to pull, and can be freely attached to the other pipe, and
A piping joint device comprising: a fixed ring connected to the movable ring by a connector; and a spacer formed inside the movable ring. 2. The apparatus according to claim 1, wherein the spacer of the movable ring is formed of a hard resin.