JPS5833692A - Drilling apparatus of underground pipe propelling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a propulsion excavation device for laying underground conduits for accommodating communication cables without excavation except between shafts.

In the conventional ffi device for this bucket, the advancing face is always open during excavation and soil removal, and as a countermeasure for this,
Auxiliary methods such as muddy water and #liquid injection are used. For this reason, in the aqueous layer, the inflow of sediment and water from the face is intense, which shortens the time required to drain the earth and sand from the face, and after the construction is completed, the ground surface t1+7 may sink, resulting in high costs. There was a drawback.

In order to solve these drawbacks, the present invention provides a device W with a sphere rotatably attached to a shaft perpendicular to the propulsion direction at the rear of a tapered casing whose inner diameter gradually decreases from the tip to the rear shoulder. L. Advance the sphere opening toward the face, fill the space between the cylinder and disk on the inner surface of the sphere with earth and sand, then turn the sphere over and close the face with the disk to prevent the inflow of earth, sand and water. At the same time, by moving the disk forward again, the disk discharges the earth and sand. The present invention will be explained in detail below with reference to the drawings.

Figure 1 is a sectional view of one embodiment of the present invention, and Figure 2 is Figure 1A.
- A sectional view at A', where No is a tapered casing, 2 is a sphere, 3 is a disc, is an outer tube, j is an inner tube, O is a hydraulic motor, 7 is a worm gear, and r is an umbrella. gear,
W is an oil 0-hose, IO is a disk guide, 11 is a stopper, and 12 is a rotating shaft.

At the rear of the tapered casing l whose inner diameter gradually decreases from the tip to the rear end, there is a sphere λ supported by surface contact with the inner tube j. This spherical body is rotatably attached to the outer cylinder Iuv around a rotation axis lλ. The inner surface of this sphere 2 is cylindrical, and there is provided a disk guide /θ for the disk 3 that moves back and forth, and a stopper // is attached to the end of the guide to prevent the disk from coming off. Also, the rotation axis 1
A bevel gear is attached to 2, and this rotating shaft 2 is fixed to the outer cylinder tube. A worm gear IIL7 is connected to the bevel gear r, and the worm gear 7 is rotated by a hydraulic motor t.

To operate this, a separate press and 8 units are provided in the state shown in Figure 1. The space between the inner surface of the sphere and the disc 3 is gradually filled, and the disc 3 is pushed backwards while being consolidated and dehydrated by the tapered casing gel. It moves and is stopped by the stopper //. Here, the propulsion is stopped and the hydraulic motor 6 is driven to rotate the sphere λ by /lrO' via the worm gear 7 and the bevel gear.

Here, it is again propelled by the pushing device described in 11'iJ, and as the earth and sand fills the sphere, the disk 3 is pushed by the earth and sand, and the earth and sand on the opposite side are pushed out into the inner cylinder 'uS. come. This earth and sand is discharged to the outside by air transport using the inner pipe 5. Repeat the same actions above to propel the tube.

As explained above, the excavation device for the underground pipeline propulsion device of the present invention fills the space between the inside of the cylinder on the inner surface of the sphere and the disk 3 while consolidating and dewatering the earth and sand inside the tapered casing 1. ll1
i, the sphere is rotated 1lr00 around the rotating shaft 12, the face is closed by the disk, and at the same time it is propelled again, thereby filling the sphere with earth and sand and removing the previously clogged earth and sand. This method allows soil to be removed in a single action, and even in spring-fed ground, it prevents the inflow of more than necessary soil and water from the face surface, and makes soil removal easy, so it can be used for chemical injection methods and for lowering the groundwater level. It has the advantage of not requiring any auxiliary methods such as construction methods, and can be carried out in a tedious, safe and convenient manner.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of one embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 7, and Fig. 3 is an explanatory diagram of the operation of the excavation device of the underground pipeline propulsion machine according to the present invention. be. l... Tapered casing, 2... Sphere, 3...
・Disc, l...outer tube, j...inner tube, 6...hydraulic motor, 7...worm gear, ni...bevel gear,
? ...Hydraulic hose, lθ...Disc guide, ll...
・Stopper, ll...times 1 fut. Patent applicant Nippon Telegraph and Telephone Corporation? , q8 figure

Claims (1)

[Claims] L In a propulsion excavation device that immerses underground pipes without excavation, a tapered casing with an inner diameter that gradually decreases from the tip of the outer cylindrical pipe to the inside of the cylindrical pipe toward the rear, and then on the axis perpendicular to the direction of propulsion,
The outer surface is spherical and the inner surface is cylindrical.The hydraulic motor installed in the gap between the outer cylinder tube and the inner cylinder tube is rotatably attached via a bevel gear and a worm gear connected between the perpendicular shaft and the hydraulic motor.The outer surface is spherical and the inner surface is cylindrical. a spherical body, a disc attached to the cylindrical body so as to be movable in parallel in the direction of propulsion, and an inner wall of the cylindrical shape that stops the disc when it moves backwards in parallel by a predetermined distance. defined by the attached stopper,
This is propelled into the soil by a separately provided pushing pipe device, and the tapered casing compresses and dewaters the soil, gradually filling the space between the inner surface of the sphere and the disc, and the disc moves parallel to the rear. After being stopped by the stopper, the hydraulic motor is driven to move J-1l! through the worm gear and bevel gear. An underground pipeline propulsion machine characterized in that after rotating the body by 1rO0, it is propelled again by the pushing pipe device f, and the earth is discharged to the outside by pneumatic transport through the inner cylinder pipe. drilling rig.