JPH0522037B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for guiding a small diameter tube propulsion machine.

The small-diameter tube propulsion machine is designed as shown in Fig. 1, in which the trailing tube b is successively pressed and buried by the leading device a, which propels the tube underground in a compact manner.
The conventional guide device of such a small-diameter tube propulsion machine cannot be controlled in any direction, and as a result, the accuracy of burying the tube is poor, and therefore the tube can only be buried a short distance.

In the first example, c is a propulsion jack installed in the starting shaft d, and e is a control unit.

The present invention was developed in consideration of the above-mentioned problems, and it is possible to control the propulsion direction in any direction underground even with a small-diameter propulsion device with a diameter of 150 mm or less, and to minimize installation errors even when propelled over long distances. The purpose of the present invention is to provide a method and device for guiding a small-diameter tube propulsion machine.

Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.

In the figure, 1 is the leading pipe, and this leading pipe 1 is the cylinder 2.
The piston 4a of the piston rod 4 has the compression head 3 fixed to the tip of the cylinder 2.
is inserted. 5a and 5b are piston rods 4
A bottom side chamber and a rod side chamber of the cylinder 2 are separated by a piston 4a. A spiral lead hole 6 is provided in the axial center of the piston rod 4, and a spiral lead rod 7 is screwed into this spiral lead hole 6. The spiral lead rod 7 is fixed to the rear end of the leading pipe 1. 8 is a detection rod that passes through the spiral lead rod 7 and has its tip fixed to the piston rod 4;
The base of this detection rod 8 is the input shaft 9a of the angle detector 9.
It is connected so as to be able to swing freely in the axial direction and to be engaged in the rotational direction. Reference numeral 10 denotes an auxiliary tube fixed to the rear side of the leading tube 1, and the angle detector 9 is fixed to this auxiliary tube 10. Reference numerals 11 and 12 are hydraulic pipes connected to both chambers 5a and 5b of the cylinder 2, and these hydraulic pipes 11 and 12 are connected to a hydraulic pump via a control valve 13 provided on the starting shaft side through a subsequent pipe (not shown). It is connected to 14. Note that an intermittent switching valve 15 is interposed in the hydraulic pipe 11 connected to the bottom side chamber 5a.

The consolidation head 3 has a cylindrical shape, and deflection plates 16, 16 each inclined at the same angle with respect to the axis are fixed to both sides of the consolidation head 3.

FIGS. 4A and 4B show an embodiment of the angle detector 9, which detects the rotation angle of the input shaft 9a based on a change in electrical resistance.

Spiral lead hole 6 of the piston rod 4 above
The relationship between the piston 4a and the spiral lead rod 7 is
is from the bottom side to the rod side (or vice versa)
Piston rod 4 moves 360 degrees by one stroke to
It is supposed to rotate by ℃.

The angle detector 9 may be configured to directly detect the rotation angle of the piston 4a, but it may also be configured to detect the amount of movement of the piston 4a and convert the rotation angle from this amount of movement. good.

In the above configuration, the intermittent switching valve 15 is set to the communication position and the operating valve 13 is operated to control both chambers 5 of the cylinder 2.
By alternately supplying pressure oil to a and 5b, the piston rod 4 moves to extend and contract with respect to the leading pipe 1, and due to the spiral lead, it rotates once in one stroke of the extension motion, and rotates once in the opposite direction in one stroke of the shortening motion. Rotate. The intermittent switching valve 15 is kept in the off position during consolidation propulsion by jacking. The rotation angle of the piston rod 4 is detected by an angle detector 9.

The propulsion process of the guide device will be explained below.

(1) An example of the propulsion process when moving straight (Figure 5) As shown in Figure A, the piston rod 4 of the underground guiding device is moved to expand and contract with the guiding pipe 1 stopped [B, C] This will result in consolidation. Head 3 is 1
It moves back and forth while reciprocating, creating a hole 17 in front of the consolidation head 3 (Figure C). Next, this hole 1
The leading device is propelled by jacking the leading tube 1 along 7 through the trailing tube 18 (FIG. D).

In addition, during the above operation, the piston rod 4
With the piston rod extended, insert the guide device into the piston rod 4.
The leading device may be propelled by following the movement.

(2) Example of the propulsion process when correcting direction: Know the position, inclination, etc. of the leading device in advance by another method, and decide the direction in which you want to correct the direction. Then, the direction of the consolidation head 3 is set in the direction in which the direction is desired to be corrected. The orientation of the consolidation head 3 is set by extending (or shortening) the piston rod 4 to impart rotation to the consolidation head 3. After setting, the intermittent switching valve 15 is set to the off position to block the hydraulic circuit. After the above settings, the intermittent pipe 18
It is propelled from the launch shaft via the FIG. 6 shows a case where it is desired to correct the direction downward, and by propelling in this state, the vehicle is propelled downward.

The present invention is as described above, and in the leading device of a small-diameter tube propulsion machine that is compactly propelled into the ground from a starting shaft via a trailing pipe 18, deflection plates 16, 16 that are inclined with respect to the axis are fixed to the side surfaces. With the leading pipe 1 stopped, the consolidating head 3 is rotated and extended from the distal end of the leading pipe 1 in the distal direction, and then the leading pipe 1 is propelled straight ahead by following the lead pipe 1, and the consolidating head 3 is moved forward. 3 is stopped at both ends and in the middle of the rotating expansion and contraction process, and the consolidation head 3 is propelled together with the leading pipe 1 to correct the direction along the inclination of the deflection plates 16, 16, so that it can move straight. Not only that, but the direction can be adjusted freely, and small diameter pipes can be buried over long distances with small burying errors.

Further, according to the present invention, the apparatus for carrying out the above method is rotated by a consolidation head 3 having deflection plates 16a and 16b fixed to the side surfaces thereof, which are inclined with respect to the axis, at the tip of the leading tube 1 constituting the leading device. The consolidating head 3 and the leading pipe 1 are engaged with each other via a spiral lead which rotates as the consolidating head 3 expands and contracts, and the consolidating head 3 is also telescopically moved. A telescopic drive means for this is provided on the leading pipe 1 side, and the consolidation head 3 is provided with
Since the angle detector 9 that detects the rotation angle of the consolidation head 3 is connected, the guide device with the deflection function can be configured with a small diameter, and it can be applied to ultra-small diameter propulsion machines with a diameter of 150 mm or less. can.

[Brief explanation of the drawing]

Fig. 1 is a schematic structural explanatory diagram of a small diameter tube propulsion machine, Fig. 2 is a sectional view showing an embodiment of the present invention, and Fig. 3 is a sectional view showing an embodiment of the present invention.
The figure is an arrow view of Fig. 2, Fig. 4 A, B is a wiring diagram showing an embodiment of the angle detector, Fig. 5 A, B, C, D
6 is an explanatory diagram of the operation when the vehicle is traveling straight, and FIG. 6 is an explanatory diagram of the operation when the vehicle is correcting the direction. 1 is a leading pipe, 2 is a cylinder, 3 is a consolidation head,
4 is a piston rod, 4a is a piston, 9 is an angle detector, 16 is a deflection plate, and 18 is a trailing tube.

Claims (1)

[Claims] 1. In a leading device for a small-diameter tube propulsion machine that is compacted and propelled into the ground from a starting shaft via a trailing pipe 18, a compaction system in which deflection plates 16, 16 tilted with respect to the axis are fixed to the side surface. With the leading pipe 1 stopped, the head 3 is extended and contracted from the tip of the leading pipe 1 while rotating in the distal direction, and then the leading pipe 1 is followed by the leading pipe 1 to be propelled straight ahead, and the above-mentioned consolidation head 3 is moved in this direction. The small device is characterized in that the compaction head 3 is stopped at both ends and in the middle of the rotating expansion and contraction process, and the consolidation head 3 is propelled together with the leading pipe 1 to correct the direction along the inclination of the deflection plates 16, 16. How to lead a caliber tube propulsion machine. 2. In a leading device for a small-diameter tube propulsion machine that is compactly propelled into the ground from a starting shaft via a trailing pipe 18, deflection plates 16a and 16b that are inclined with respect to the axis are installed at the tip of the leading pipe 1 constituting the leading device. A consolidation head 3 fixed to the side is rotatably and extendably movable,
The consolidation head 3 and the leading pipe 1 are connected to the consolidation head 3.
The consolidating head 3 is engaged via a spiral lead that rotates when the consolidating head 3 expands and contracts, and an extensible drive means for extending and contracting the consolidating head 3 is provided on the leading pipe 1 side. A leading device for a small diameter tube propulsion machine, characterized in that an angle detector 9 for detecting the rotation angle of a consolidation head 3 is connected.