JP3354719B2 - Pipe joining equipment - 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 joining apparatus capable of accurately joining a pipe laid in a trench cut out from the ground surface, for example, even if the pipe has a short length.

[0002]

2. Description of the Related Art When laying a pipe in a trench cut from the ground surface, a joining apparatus shown in FIG. 7 has conventionally been used for joining a pipe to a deformed pipe having a short pipe length. That is, a receiving port holding member 3 having a pair of left and right eccentric clamp rollers 3a is fitted around the neck of the receiving port 1a of the pipe 1 to engage with a plurality of projections 2b protruding from the insertion port 2a of the modified pipe 2. The insertion saddle member 4 which is stopped and prevented from being pulled out toward the insertion opening 2a is fitted to the straight pipe portion of the insertion opening 2a. Then, a pair of left and right holding and joining cylinder devices 5 connected to the insertion saddle member 4.
Is connected to the rotating lever 3b of the eccentric clamp roller 3a. Then, by contracting the holding / joining cylinder device 5, the eccentric clamp roller 3a is brought into pressure contact with the outer surface of the pipe 1 via the rotating lever 3b to fix the socket holding member 3 near the neck of the socket 1a, Further, by contracting the holding / joining cylinder device 5, the deformed pipe 2 is drawn in through the insertion saddle member 4, the insertion port 2 a is inserted into the receiving port 1 a, and the pipe 1 and the different diameter pipe 2 are connected. Was something.

[0003]

However, in the above-mentioned conventional joining apparatus, unlike the long straight pipe, the short pipe length causes the different-diameter pipe 2 to easily oscillate. In some cases, the difference was increased due to the difference in the driving amount of the cylinder device 5. As a countermeasure, it is necessary for the worker to push the different diameter pipes by hand and fit the insertion port 2a into the receiving port 1a while aligning.

Accordingly, the present invention solves such a problem, and provides a pipe joining apparatus capable of easily and accurately joining pipes even when the length of the pipe is short and easily deformed or short. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a pipe joining device according to the present invention is arranged oppositely on the same axis.
A tube joining apparatus for joining to tubes each other,
A saddle member that is removably fitted to the neck of the socket formed at the end of one of the tubes to be joined, and is prevented from falling off on the socket side;
A spigot holding member which is retained freely a spigot side Hamada' the outer peripheral portion of the other spigot vicinity formed at the end of the tube to be joined, attached to the tube axis center direction to the saddle member At least a pair of left and right joining expansion / contraction driving devices, a constraint interlocking member connecting the output ends of the joining expansion / contraction driving devices to each other, and at least two of the output end of each of the joining expansion / contraction driving devices and the insertion holding member. 2 connected to each other
And a connecting member. Claim 2
The pipe connecting device according to claim 1, wherein
Interlocking member, semi-ring shape with inner diameter larger than outer diameter of receiving port
, And the connecting member has an equal length.

[0006]

In the above construction, in a state in which the expansion / contraction drive device for connection has been extended, a saddle member is fitted and attached to the neck of the socket of one of the tubes arranged oppositely on the same axis. An insertion holding member is fitted and mounted on the outer periphery of the straight pipe portion of the insertion opening of the other pipe, and the saddle member and the insertion holding member are prevented from coming off and mounted. Then, by contracting the pair of right and left joining expansion / contraction drive devices, the insertion port holding member is pulled through the connecting member, and the insertion port is fitted into the receiving port. At this time, since the output ends of the two joining expansion and contraction driving devices are connected to each other by the constraint interlocking member, the left and right output ends are driven synchronously so that the insertion ports are pulled in without swinging to the left or right. And the output end of the joint expansion / contraction drive is 2
Since the connection member is connected to the upper and lower positions of the insertion holding member, the insertion opening can be prevented from vertically swinging, and the insertion can be accurately introduced into the receiving opening. Therefore, even in the case of a deformed pipe or a short pipe in which the length of the pipe is short and easy to swing, the pipe joining operation can be easily and accurately performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a pipe joining apparatus according to the present invention will be described below with reference to FIGS. In FIG. 6, reference numeral 11 denotes a cut groove formed at a predetermined depth from the ground surface 12;
1, a pipe 13 is already laid.
Then, the next newly-formed pipe 14 is joined. This existing pipe 13
Is buried in the cut groove 11 so that a receiving port 15 at one end is exposed.
6 are joined. A saddle member 17 is attached to the neck 15a of the receptacle 15, and an insertion holding member 18 is fitted around the outer periphery of the straight pipe near the insertion opening 16, so that a gap between the saddle member 17 and the insertion holding member 18 is formed. A pair of right and left hydraulic joining cylinder devices (joining expansion / contraction drive devices) 19 are connected to the cylinder.

As shown in FIGS. 1, 2 and 3, the insertion holding member 18 includes a pair of left and right half
2, the half ring 21 is fastened with fixing bolts and nuts 24 attached to a bracket 23 provided at the free end of the half ring 21 so that the insertion holding member 18 is inserted into the opening 16. It can be externally fitted to a nearby straight pipe portion. At this time, a plurality of projections 25
Accordingly, the insertion holding member 18 is configured to be prevented from coming off toward the insertion opening 16. Furthermore, this half ring body 21
The connecting plate 26 to which the joining cylinder device 19 is connected at a position 45 degrees above and below the horizontal position is provided on the outer peripheral portion of the connecting plate 26.
Are protrudingly provided at two places in the upper and lower parts, respectively, in total four places.

The saddle member 17 is shown in FIGS.
As shown in the figure, a semi-ring is formed in the neck 15a of the socket 15 of the existing pipe 13 so as to be detachable from above and has an inner diameter smaller than the outer diameter of the socket 15, and moves toward the socket 15 in the fitted state. Is regulated and stopped. At both ends of the saddle member 7, a tapered guide surface 27 for guiding the fitting of the saddle member 7 to the neck 15a is formed, and the main body 19a of the joining cylinder device 19 is mounted in the axial direction of the tube via the mounting member 28. Fixed.

As shown in FIG. 4, the distal end (output end) of a piston rod 19b of the cylinder device 19 for connecting both ends.
A semi-ring-shaped constraining interlocking member 31 having an inner diameter larger than the outer diameter of the receiving port 15 is attached to and connected to each other, so that both joining cylinder devices 19 can be accurately and synchronously interlocked. Also, the joining cylinder device 19
A connecting tool 33 for mounting two connecting chains (connecting members) 32 is attached to the distal end portion of the piston rod 19, respectively. It is connected to the connection plate 26. Thus, when the piston rod 19b is contracted and driven, the upper and lower connecting chains 32 and the half-ring body 21 between the connecting plates 26 form an isosceles triangle in a side view having the tip of the piston rod 19b as the apex, and hold the opening. It is configured to prevent the member 18 from vibrating in the vertical direction. Of course, a wire rope or a link rod can be used instead of the connecting chain 32 as the connecting member.

Next, an operation of joining the newly formed pipe 14 to the existing pipe 13 by the pipe joining apparatus having the above-described structure will be described. At the receiving port 15 of the existing pipe 13, the insertion port 16 of the newly formed pipe 14 suspended by a crane or the like is arranged on the same axis so as to face each other,
The saddle member 17 and the insertion holding member 18 are suspended from the ground surface 12 together with the joining cylinder device 19 in the cutout groove 1, and the saddle member 17 is fitted to the neck 15 a of the receiving port 15 from above. Then, the half ring body 2 of the insertion holding member 18
1 is opened and fitted outside the insertion port 16 near the projection 25 near the back,
The half-ring body 21 is closed, fixed with fixing bolts / nuts 24, and prevented from coming off by a plurality of projections 25.

Next, when the holding and joining cylinder devices 19 are respectively contracted, the piston rods 19b connected to each other by the restraining interlocking member 31 are respectively contracted and moved, and the insertion holding member 18 is connected to the saddle member 17 via the connecting chain 32. Then, the newly formed pipe 14 is connected to the existing pipe 13 by fitting the insertion port 16 into the receiving port 15.

At this time, since the tip ends of the two piston rods 19b are connected to each other by the restraining interlocking member 31, they are contracted and moved synchronously, and the newly-formed pipe 14 is accurately inserted in the fitting direction without swinging left and right. Moved to Also,
Since the two connecting chains 32 respectively connected to the upper and lower positions of the insertion hole holding member 19 are connected to the tip of one piston rod 19b, the newly formed pipe 14 is prevented from swinging up and down and accurately. It is moved in the fitting direction, and the insertion port 16 of the newly formed pipe 14 can be easily and accurately fitted to the receiving port 15 of the existing pipe 13.

After the joining is completed, the joining cylinder device 9 is slightly advanced to loosen the connecting chain 32 and the insertion holding member 18
The half-ring body 21 is released by removing the fixing bolts and nuts 24, the insertion holding member 18 is removed from the newly formed pipe 14, and the saddle member 7 is lifted upward to be removed from the existing pipe 13, and is joined with the joining cylinder device 19. Lift and carry out from the cut groove 1.

According to the above embodiment, unlike the straight pipe, even in the case of the deformed pipe 14 having a short pipe length and easily causing deflection, the two piston rods 19b are connected to each other by the restraining interlocking member 31 to be accurately synchronized. It can be contracted and moved, and the newly formed pipe 14 can be effectively prevented from swaying left and right. Also, two connecting chains 32 are attached to one piston rod 19b, and these connecting chains 32 are connected to the upper and lower positions of the connecting port holding member 19, respectively. Half ring body 21 between 26
To form an isosceles triangle, which is
Can be effectively prevented from swinging up and down. Therefore, the insertion port 16 of the newly formed pipe 14 is connected to the existing pipe 1.
3 can be easily and accurately fitted.

[0016]

As described above, according to the pipe joining apparatus of the present invention, in a state where the telescopic drive for joining is extended, the receiving port of one of the pipes opposed to each other on the same axis is extended. A saddle member was fitted and mounted on the neck, and an insertion holding member was fitted and mounted on the outer periphery of the straight pipe portion of the insertion opening of the other tube, and the saddle member and the insertion holding member were prevented from falling off and mounted. Thereafter, by contracting the pair of left and right joining expansion / contraction driving devices, the insertion port holding member can be pulled through the connecting member, and the insertion port can be fitted into the receiving port. At this time, since the output ends of the two joining expansion and contraction driving devices are connected to each other by the restraining interlocking member, the left and right output ends are accurately driven synchronously, and the left and right output ends are not changed without fluctuation. The opening can be drawn into the receiving side without swinging. Furthermore, since the output end of the joint expansion / contraction drive device is connected to the upper and lower positions of the insertion holding member by two connecting members, the insertion opening is prevented from swinging in the vertical direction, and the insertion can be accurately made into the receiving opening. Can be introduced. Therefore, even in the case of a deformed pipe or a short pipe in which the length of the pipe is short and easy to swing, the pipe joining operation can be easily and accurately performed.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view taken along the line AA shown in FIG.

FIG. 4 is a sectional view taken along line BB shown in FIG. 1;

FIG. 5 is a sectional view taken along the line CC shown in FIG.

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

FIG. 7 is a side view showing a conventional pipe joining device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Opening groove 13 Existing pipe 14 Newly-formed pipe 15 Reception port 15a Neck 16 Insertion 17 Saddle member 18 Insertion holding member 19 Joining cylinder device (Joint expansion / contraction drive device) 19a Cylinder main body 19b Piston rod (output end) 25 Projection 26 connecting plate 31 constraint interlocking member 32 connecting chain (connecting member) 33 connecting tool

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-137462 (JP, A) JP-A-4-4381 (JP, A) JP-A-57-144388 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) F16L 1/00 F16L 1/024

Claims (2)

(57) [Claims] 1. A pipe joining apparatus for joining pipes arranged opposite to each other on the same axis , said pipe joining apparatus being fitted into and removed from a neck of a socket formed at an end of one of the pipes to be joined. A saddle member that can be freely and prevented from falling off on the receiving side, and an insertion port that can be freely fitted on and removed from the outer peripheral portion near the insertion port formed at the end of the other pipe to be joined and is prevented from being removed on the insertion side. a holding member, at least a pair of bonding telescopic drive mounted in the tube axis center direction to the saddle member, and restraining the interlocking member for connecting together the output ends of the joining stretch drive, for each junction A pipe joining device comprising: two connecting members connected between an output end of a telescopic drive device and at least two upper and lower portions of an insertion holding member. 2. The restraining interlocking member, wherein the inner diameter is larger than the outer diameter of the receiving port.
2. The pipe joining device according to claim 1 , wherein the connecting member is formed in a large semi-ring shape, and the connecting member has an equal length .