JP2547902Y2 - Joint mechanism of interior pipeline for perforated pipe propulsion method - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] The present invention relates to a joint mechanism of an interior pipe for a perforated pipe propulsion method, and appropriately applies an interior pipe such as a pressure feed pipe for a perforated pipe propulsion method with a preferable tensile strength. It is possible to smoothly perform the operation of connecting and pulling out the interior conduit from the perforated tube, and to obtain a joint mechanism that does not damage the inside of the hole at the time of pulling out and has appropriate abrasion resistance. In this method, a large-diameter interior pipe is inserted in a limited space as a construction method mechanism, and an attempt is made to effectively use a perforated pipe.

(Industrial application field) Technology related to the handling of interior pipelines, such as pressure pipes for discharging sediment in the perforated pipe propulsion method.

(Prior Art) In a cable for drawing a cable or the like into a buried pipe laid by a propulsion method, the propelled laying pipe itself is a perforated pipe 11 provided with a hole 15 as shown in FIG. Sectioning and insertion are performed. However, as described above, the hole 15 of the propulsion pipe into which the cable etc. is finally inserted is used for the insertion of the pressure feed pipe for discharging the earth and sand from the tip of the semi-shield mechanism during the propulsion work, and the insertion of cables for work and others. Utilization is being done.

(Problem to be Solved by the Invention) In the above-described conventional apparatus, as described above, the internal conduit such as the pressure feed pipe inserted into the hole 15 of the porous propulsion pipe 11 has a limited space of the porous propulsion pipe. It is clear that a pipe with a diameter as large as possible is preferable. That is, if the pipe is a large-diameter interior pipe, the earth removal etc. are performed efficiently, but such an interior pipe is connected by a flange joint or the like. It is necessary to insert the target cable and the like after the construction in the state where it was done, and it is necessary to insert the target cable and the like. The tendency to be caught in the hole 15 of the perforated propulsion tube and not to be able to be smoothly drawn cannot be avoided.

For this reason, the size (outer diameter) of the inner pipe such as the pressure feed pipe is limited by the diameter of the joint (generally 1.5 to 2.0 parts of the pipe diameter), and is considerably smaller than the inner diameter of the hole. This inevitably reduces the performance of the interior tube. It should be noted that increasing the diameter of the hole portion is disadvantageous in terms of both economy and workability because the diameter of the porous tube 11 itself is increased.

In particular, in the case of using a flange joint, the joint set to engage with the flange portion in the direction perpendicular to the pipe diameter is caught in the hole hole, which corresponds to twice as much as the interior conduit, and in the case of other joints, the pipe diameter direction Since the tightening seat portion protruding to the side of the joint housing divided at the joint surface is also caught in the hole, the pull-out is not easy and the inside of the hole is likely to be damaged. In addition, a flange joint cannot absorb a bending angle (for example, about 2 °) required for an interior pipe such as the pressure feed pipe having poor flexibility.

"Constitution of the invention" (Means for solving the problem) The invention is locked by a locking ring provided near the ends of both pipelines to be connected, and is covered between the ends of the aforementioned pipelines. It has a divided housing for accommodating the packing, the outer peripheral surfaces of both ends of the divided housing are each formed as a gentle inclined surface of 10 to 15 °, and a connecting bolt screw hole orthogonal to the divided surface in the divided housing is formed by the divided housing. In the longitudinal direction of the split housing, the engagement hole is located between the engagement ring engagement groove and the packing receiving groove, and in the thickness direction of the divided housing, the screw hole is at least partially provided in the engagement ring engagement groove and the packing. A joint mechanism for an interior pipeline for a perforated pipe propulsion method, wherein the joint mechanism is provided so as to form a superimposed relationship with a receiving groove.

(Operation) The two housings to be connected are accurately grasped by the split housing locked by the locking ring being tightened by bolts.

The packing accommodated in such a split housing is effectively set between the pipe ends of the two pipe sections to form a stable pipe section connection mechanism.

By forming a gentle slope of 10 ° or more on each outer peripheral surface of both ends of the split housing, the intermediate housing is locked with the locking ring to form a thickness for receiving the packing, and 15 ° or less. By forming a sufficient joint range between the inner pipe such as the pressure feed pipe and the split housing to obtain a stable connection and tensile strength, the perforated pipe propulsion method is used with the inner pipe as the pipe body. The operation of pulling out and exchanging from the hole in the above is greatly facilitated under the condition that the resistance is appropriately reduced.

A connecting bolt screw hole is located between the locking ring locking portion and the packing accommodating portion in the split housing, and the screw hole is at least partially provided in the thickness direction of the split housing. The provision of the locking groove and the packing receiving groove so as to form an overlapping arrangement does not require a particularly large thickness for the formation of the screw hole, the locking portion, and the accommodation portion, and is relatively thin. In such a divided housing, connection bolts and the like are appropriately positioned within the thickness range.

As described above, the connecting bolt is completely housed in the receiving hole in the thickness range of the divided housing, so that the connecting bolt portion is propelled when the inner pipe such as the pressure feed pipe is withdrawn as described above. Smooth things that get caught in the porous part of the construction pipe.

Further, by performing the above, the outer diameter of the joint portion is generally set within 1.2D with respect to the outer diameter D of the pipe to be connected, so that a relatively large-diameter inner conduit can be set in a limited space. .

(Embodiment) A specific embodiment of the present invention as described above will be described. As shown in FIG. 1, a locking ring provided near the ends of both pipe sections 10, 10 to be connected. 12,
A split housing 1 having a receiving groove 3 for receiving a packing 9 having a C-shaped cross section which is crotchly provided between the end portions of the pipe groove members 11 and 11 and the locking groove 2 which is locked with the groove 12. , And the outer peripheral surfaces of both ends of the divided housings 1 and 1 are respectively provided.
Slightly inclined surfaces 6, 6 having an inclination of about 10 to 15 °, and divided end faces of the divided housings 1, 1 in the longitudinal direction of the divided housings 1, 1 between the locking grooves 2 and the receiving grooves 3. A connection bolt insertion hole 4 and a screw insertion hole 5 perpendicular to the above are formed, and the connection bolt 8 inserted into the insertion hole 4 and the screw insertion hole 5 is screwed into the screw insertion hole 5 (separately). The two split housings 1, 1 are fastened as shown in FIG. 2 (without using nuts) and less than 20% of the diameter of the inner tube 10 of these housings 1, 1 as shown in FIG. The bolt 8 is provided with a square operation hole 7 in a head portion 8a of the bolt 8 together with the locking ring 12 and the packing 9.

That is, the connecting bolt 8 can be freely tightened and loosened by inserting the head of the rotary rod having the square engaging portion into the square operating hole 7 and rotating it, thereby completing the tightening. Thus, the head of the connection bolt 8 is completely immersed in the bolt screw hole 5 and is buried in the housing. In this way, the bolts for fastening the divided housing are embedded and immersed in the thickness region of the housing, and the outer peripheral surfaces of both ends of the housing have a gentle inclination of 10 to 15 °. According to the experiment, it is possible to smoothly and properly insert and remove with a perforated hole having a large diameter of about 5% of the outer diameter of the housing. In this method, a perforated hole having at least 20% of the outer diameter of the housing is required, and it is easy to be caught.

The pressure pipe connected in this way has an internal pressure of 60 kg / c.
m ² , which can withstand a tensile force of about 10 tons when the pipe is empty, and can sufficiently cope with bending of the perforated pipe 11 generated during propulsion, and almost does not damage the perforated hole 12 during the drawing operation. There was nothing. It is preferable to provide various linings 16 on the outer surfaces of the divided housings 1 and 1 so as not to damage the perforated pipe 11, such as epoxy or nylon resin powder, urethane resin or fluorine resin. For example, coating by such as can be adopted.

According to the present invention as described above, the inner pipe can be easily inserted into and removed from the perforated hole portion of the propulsion perforated pipe, that is, the perforated hole is pumped during propulsion construction. Perform construction using the insertion hole for pipes, etc., and smoothly carry out a construction method such as pulling out after completion of construction and setting a predetermined cable etc., that is, reduce the outer diameter of the joint part compared to the outer diameter of the inner pipe such as the pressure feed pipe Since it can be designed to the minimum state and there are no protrusions, the hole diameter for cable construction is minimized, the outer diameter of the joint part is reduced to within 1.2 times the outer diameter of the internal pipeline, and it is relatively large as the pressure feeding pipe Advantageous and economical construction, efficient work, and the ability to set a larger inner pipe within a limited perforated pipe by the propulsion method, and to be able to withdraw, etc. With This is a practically effective device.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a partially cutaway side view of one example of the present invention, FIG. 2 is a cut end view thereof, and FIG. 3 is an end view of a perforated pipe. is there. However, in these figures, 1 is a split housing, 2
Is a locking ring locking groove, 3 is a packing receiving groove, 4 is a bolt insertion hole, 5 is a screw hole, 6 is a gently inclined surface, 7 is a square operation hole, 8 is a connection bolt, 8a is its head, 9 Is packing,
Reference numeral 10 denotes a pressure feed pipe, 11 denotes a perforated pipe, 12 denotes a locking ring, 15 denotes a hole of the perforated pipe, and 16 denotes a lining.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hideto Abe 4-1-1-18 Yushima, Bunkyo-ku, Tokyo Kandenko Co., Ltd. (56) References JP-A-62-280491 (JP, A) Sho Akai Kai 62-163594 (JP, U) Japanese Utility Model Showa 63-18595 (JP, U) Japanese Patent Publication No. 50-12173 (JP, B2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A split housing for locking a locking ring provided near the ends of both conduits to be connected and for accommodating a packing covered between the ends of the two conduits. , 10-15
° and a connecting bolt screw hole perpendicular to the dividing surface of the divided housing is positioned between the engaging ring engaging groove and the packing receiving groove in the longitudinal direction of the divided housing. Further, in the thickness direction of the divided housing, the screw-in hole is provided so as to at least partially form an overlapping relationship with the locking ring locking groove and the packing receiving groove. Joint mechanism for interior pipeline.