JP2524939Y2 - Pipe with inlet - 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 having an inlet used for a propulsion method or the like.

[0002]

2. Description of the Related Art At the time of the conventional propulsion method, the propulsion is performed while jetting a sliding material or the like in order to reduce the frictional resistance between the earth and sand and the propulsion pipe. Was something.

In FIG. 5, the iron pipe 1 has a stepped portion 3 for propelling the iron pipe 1 by engaging the insertion end of a subsequent iron pipe inserted into the inner surface of the socket 2 so that the iron pipe 1 is inserted. The diameter of the insertion port 2 is larger than the diameter of the insertion port 4 within a range M from the rear end face of the receiving port 2 to the position near the step portion 3. It is inclined to get closer.
A cylindrical exterior plate 5 for reducing frictional resistance during the propulsion method received from the outer shape of the receiving port 2 is fitted around an appropriate length including the range M. 1 is filled with the exterior concrete 6.

An injection port 7 for injecting a lubricating material into a gap between the iron pipe 1 and the peripheral wall of the propulsion hole during the propulsion method has a pipe wall extending from the inside of the iron pipe 1 toward the peripheral wall of the propulsion hole in a straight pipe portion of the iron pipe 1. It is provided through the exterior concrete 6 and the exterior plate 5. A socket 8 for mounting a lubricating material injection nozzle (not shown) is provided in a portion of the thick exterior concrete 6.

[0005]

As described above, in the iron pipe 1 with an injection port, the injection port 7 penetrates the thick portion of the exterior concrete 6 through a thin straight pipe portion of the pipe side wall. Since it is provided, the socket 8 for mounting the lubricant injection nozzle at a position corresponding to the exterior concrete 6
Therefore, an operation of fixing the socket 8 to the outer surface of the pipe by welding or the like has to be performed, so that the manufacturing process of the pipe is complicated and automation is difficult.

The present invention solves the above-mentioned problem, and an object of the present invention is to provide a tube with an inlet that does not require a socket to be erected.

[0007]

In order to solve the above-mentioned problems, a pipe with an inlet according to the present invention is designed so that a large-diameter portion or a part of the large-diameter portion of the pipe receiving port is longer than the conventional range M. The socket for mounting the lubricating material injection nozzle is eliminated by providing an injection port extending to the insertion port side and providing an injection port in a thick portion of the extension portion.

[0008]

According to the above construction, the lubricating material injection nozzle can be directly mounted on the thick side wall of the tube, and does not require a socket as in the conventional case, so that the manufacturing process is simplified and the processing time is reduced. And automation can be easily implemented.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part of an inlet pipe according to a first embodiment of the present invention, and FIG.

1 and 2, the iron pipe 11 has a step 13 on the inner surface of the receiving port 12, and a range M 'of a large-diameter portion constituting the receiving port 12.
Is formed so as to extend to the side of the insertion port 14 longer than the length up to the step portion 13, and the injection port 17 is provided in the thick portion of the tube at the extension portion. Reference numerals 15 and 16 denote an exterior plate and an exterior concrete, which are provided over the same length as in the related art, including this range M '.

As described above, since the injection port 17 is provided in the pipe thick portion of the above-mentioned extended portion, the lubricant injection nozzle (not shown) does not need to be held by a conventional socket, and
Since it can be attached to the injection port 17 provided in the thick part of the pipe, the work of setting up the socket is eliminated, and the processing time can be greatly reduced.

FIG. 3 is a sectional view of a main part of an inlet pipe according to a second embodiment of the present invention, and FIG. 2 is a sectional view taken along line BB in FIG. 3 and 4, the large-diameter portion forming the receiving port 22 of the iron pipe 21 extends to a position near the step portion 23 as in the conventional case, and only a part 22 'of the large-diameter portion extends to the range M'. The injection port 27 is provided at the thick portion of the extended portion 22 ', so that the lubricant injection nozzle is formed with the thick injection port as in the first embodiment. It can be attached to the entrance 27 itself. Therefore, it is not necessary to erect a socket as in the related art, and there is an advantage that the processing time can be shortened and the weight of the iron tube can be further reduced as compared with the first embodiment.

[0013]

According to the present invention, as described above, the injection port is provided in the thick portion formed by extending the pipe receiving port.
It is possible to mount a lubrication injection nozzle on the injection port itself, which eliminates the need to set up a socket for mounting a lubrication injection nozzle on the outer surface of the pipe as in the past,
The manufacturing process was simplified, the processing time was shortened, and a pipe with an inlet suitable for automation was obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an inlet pipe according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view of a main part of an inlet pipe according to a second embodiment of the present invention;

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a sectional view of a main part of a conventional pipe with an inlet.

[Explanation of symbols]

 11,21 Iron pipe 12,22 Reception port 13,23 Step 14,14 Insert 15 Exterior panel 16 Exterior concrete 17,27 Inlet

Claims (1)

(57) [Scope of request for utility model registration] 1. A large-diameter portion or a part of a large-diameter portion of a pipe port is provided to extend to a pipe port side longer than a step portion for a joint structure provided on an inner surface of the pipe port. A tube with an injection port, wherein an injection port is provided in a thick portion of the extension portion.