JPH0781513B2 - Pipe digging device, digging by the digging device, and pipe burying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION I) Field of Industrial Application The present invention provides a relatively small pipe for gas, water and sewage, telegraph and telephone cables, etc., under the roads, railroad lines, building structures and other obstacles. The present invention relates to the structure of a pipe digging device used for burial over a long distance, and the method of digging and pipe burying by the excavating device.

II) ... Conventional technology and its problems Conventionally, as a device for burying a small-diameter pipe (steel pipe, concrete pipe, etc.) under a road or the like as described above, for example, a device shown in FIG. 2 is generally used. Has been used,
The other devices have almost the same configuration.

In the excavation device for burying a pipe shown in the second figure, a screw conveyor 101 for excavating a pilot pit from a starting pit toward an arrival pit and a consolidation pilot pipe 102 are attached to the tip of the excavation head 103. 103 and excavation die 103a and prime mover 1
It consists of 03b (electric motor, hydraulic equipment, etc.), and the excavating head 103 excavates the excavating die 103a and the screw conveyor 1
01 is a high-pressure water outlet, is driven to rotate and excavates, and the mud-like soil is discharged to the rear of the excavation head.
104 is configured to push and excavate the excavation head 103 and the screen conveyor 101, and at the same time push the tube embedding 105 into the excavation pit to embed it.

Therefore, the above-mentioned conventional device and similar devices have the following common problems, and it has been strongly desired to solve them at an early stage.

(1) ... The hydraulic cylinder device 104 strongly presses the excavation head 103, and the excavation die 103a and the screw conveyor 101 must be rotationally driven by the driving device 103b. Therefore, each rotary shaft has a large strength. Therefore, a shaft with a large diameter is required.

As a result, the device becomes large, requires a large driving force, consumes a large amount of energy, and is expensive.

(2) ... Further, for the reason described above, the excavation die,
Since the rotation resistance of the screw conveyor etc. is large, it is a prime mover.
103b must be installed as close as possible to the excavating die 103a (as described above, excavating die 103a and prime mover 103b).
To form the excavation head 103), for that purpose, the electric wiring for the prime mover, hydraulic piping, etc. must be connected over a long distance and pushed into the excavation pit as the excavation progresses. However, (3) ... However, since the inside of the excavation pit (buried pipe) is full of discharged mud, the prime mover 103b, its wiring, piping, and auxiliary equipment are all in mud at all times. It becomes buried in the device and causes a failure of those devices, and it is extremely difficult to repair it.In order to avoid the effect even a little, the device configuration becomes complicated and the device becomes large,
High cost.

III) ... Configuration of the present invention The present invention effectively solves the above-mentioned conventional problems. The structure of the device of the present invention will be described below with reference to examples. (1) ... The present invention is based on the excavation head 9 and the hydraulic cylinder device B.
Thrust bearing 1, one or more pilot shafts 2, excavation dies 3, one or more screw shafts 4 and one or more discharge pipes 5 around them, and a hydraulic cylinder device A.
The excavating head 9, the one or more pilot shafts 2, and the prime mover 6 attached to the hydraulic cylinder device A are detachably connected on the same axis l in the order described above. The thrust bearing 1 mounted on the hydraulic cylinder device B constitutes a device for pilot digging.
And one or more pilot shafts 2, excavation dies 3 and 1
A plurality of screw shafts 4 and one or more discharge pipes 5 around them, and a driving device 6 attached to the hydraulic cylinder device A,
The pipe digging device is a pipe burying device which is detachably connected and installed on the same axis l in the order described above to form a device for digging and pipe burying.

(2) ... In the above configuration, the hydraulic cylinder devices A and B
Is provided with a speed difference (A <B, but not the difference in the pressing force or the pulling force, but the speed difference in moving the driving device 6 and the cylinder part to which the thrust bearing 1 is attached). 1 and the prime mover 6, that is, a series of connection between both A and B, one or more pilot shafts 2, the excavation die 3, and one or more screw shafts 4 are always tensioned with the set value. First, each member is provided so as to maintain a tension state on the same axis l.

(3) For the pilot shaft 2, one or more pipe shafts having a set length are prepared, and the frontmost pilot shaft 2 is the excavation head 9 or the thrust bearing 1 and the last pilot shaft 2 is the drive unit 6. Alternatively, the excavation dies 3 are detachably connected by connecting means such as screwing.

(4) ... The excavating die 3 has an excavating die on the rotary shaft, a pilot shaft 2 on the front and a screw shaft 4 on the rear.
Are detachably connected by connecting means such as screwing.

(5) ... One or more screw shafts 4 each having a set length are prepared for the screw shaft 4 having a through hole for high-pressure water, and the foremost screw shaft 4 is digging die. Three
In addition, the last screw shaft 4 is detachably connected to the driving device 6, and the discharge pipe 5 is fitted around the screw shaft 4 so as to be connected and arranged.

IV) Description of the method of the present invention (and description of the operation of the apparatus of the present invention) Next, regarding the method of excavating and burying pipes by the apparatus of the present invention,
The operation of the device of the present invention will also be described.

(1) ... Hydraulic cylinder devices A and B are provided at both ends of the required span where the pipe is embedded, for example, starting pit 7 and reaching pit 8, and first, the pilot shaft 2 having the excavation head 9 at its tip is driven. It is rotationally driven by the device 6 and pressed by the hydraulic cylinder device A, the pilot shaft 2 is connected in sequence, and the pilot shaft is excavated and propelled, and the required span is penetrated by one or more connected pilot shafts 2. 2) ... Then, the excavation head 9 is removed, and its shaft end is
The thrust bearing 1 attached to the hydraulic cylinder device B is connected to the rear end of the pilot shaft 2 to which at least one is connected, and the excavation die 3, the screw shaft 4 and the discharge pipe 5 around the excavation die 3 are connected to the rear end of the screw shaft 4. The end is connected to the prime mover 6, and (3) ... due to the action of the speed difference (A <B) between the hydraulic cylinder devices A and B, between the thrust bearing 1 and the prime mover 6, that is, between A and B in series. Connected to one or more pilot shafts 2, excavation dies 3, and one or more screw shafts 4,
While constantly applying a tension of a set value to maintain the members 2, 3 and 4 in a tensioned state on the same axis l, (4) ... Pressing with the cylinder device A, pulling with the hydraulic cylinder device B, discharging high-pressure water from the screw shaft 4, propelling it with the excavating die 3, and excavating mud-like soil with the screw shaft 4 and the discharge pipe 5. Is discharged to the outside of the excavation pit 11 (buried pipe 10), (5) ... As the excavation progresses, the pilot shaft 2 is sequentially removed, and the screw shaft 4 and the discharge pipe 5 are connected accordingly (6). The buried pipes 11 are successively pushed into the excavation mine 10 by the hydraulic cylinder device A to be buried.

V) ... Effects (1) ... Initially, the pilot shaft was connected to excavate the pilot shaft, and after the required span was penetrated, the hydraulic cylinder device A,
The pilot shaft, excavation die, and screw shaft between the prime mover attached to B and the thrust bearing, and the speed difference between the hydraulic cylinders A and B keep the tension always on the same axis with the set tension. As a result, the pilot shaft, the excavation die, and the screw shaft are in the same state as one solid shaft as a whole, and the rotary drive of the single shaft excavates the periphery thereof. At the same time, since the pressing force by the hydraulic cylinder device A and the tensile force by B act, a strong rotational driving force can be obtained and the rotational resistance can be reduced. It is not necessary, a shaft with a small diameter is sufficient, and as a result, it is possible to downsize the device,
It has excellent features that it requires relatively small driving force, consumes less energy, and enables cost reduction.

(2) Further, as described above, since the respective members are connected and installed on the same axis line and the strong single shaft is provided so as to be tensioned, as long as they are on the same axis line, as in the conventional case, It is no longer necessary to install the prime mover close to the excavation die, and as a result, the prime mover, which is the main part of the excavation operation, can be installed outside the excavation pit, and thus the prime mover can be installed as before. It was possible to eliminate the defect that the device and its wiring, piping, incidental installation, etc. were soiled with dirt and caused a failure.

(3) ... Since there is no motor or other complicated and bulky structure inside the excavation pit, the discharged soil can be treated easily and smoothly.

(4) In particular, as described above, since each member is always tensioned on the same axis of the required span as a single shaft, the single shaft serves as an accurate linear guide. , There is a retroactive effect that the pipe can be embedded in a very precise straight line over a long distance.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of the device of the present invention, and FIG. 2 is a diagram showing a schematic configuration of a conventional device. Appendices A ... Hydraulic cylinder device (for pressing), B ... Hydraulic cylinder device (for pulling), l ... Same axis line, 1 ... Thrust bearing, 2
… Pilot shaft, 3… Excavation die, 4… Screw shaft,
5 ... Discharge pipe, 6 ... Engine, 7 ... Start pit, 8 ... Reach pit,
9 ... excavation head (pilot shaft), 10 ... excavation pit, 11 ...
Buried pipes, 101 to 105 are conventional devices, 101 ... Screw conveyor, 102 ... Consolidation pilot pipe, 103 ... Excavation head, 103a
… The excavating die, 103b… the prime mover, 104… hydraulic cylinder device, 105… buried pipe.

Claims (6)

[Claims] 1. A drilling head, a thrust bearing mounted on a hydraulic cylinder device, one or more pilot shafts, a drilling die,
It consists of one or more screw shafts, one or more discharge pipes around it, and a prime mover mounted on the hydraulic cylinder device. A drilling head, one or more pilot shafts, and a prime mover mounted on the hydraulic cylinder device. The devices are detachably connected and installed on the same axis in the order described above to form a device for pilot excavation, and a thrust bearing attached to the hydraulic cylinder device and
More than one pilot shaft, excavation die, at least one screw shaft and one or more discharge pipes around it, and a prime mover attached to a hydraulic cylinder device can be attached and detached on the same axis in the order described above. An excavation device for pipe burial, which is connected to and configured to form a device for excavation and pipe burial. 2. One or more units connected in series between the thrust bearing and the prime mover, that is, both A and B, by the action of the speed difference of the hydraulic cylinder units A and B, where B is larger than A. The tension of a set value is constantly applied to the pilot shaft, the excavation die, and the one or more screw shafts so that each member is maintained in a tensioned state on the same axis line. Excavation equipment for burying pipes. 3. As for the pilot shaft, one or more pipe shafts having a set length are prepared, and the frontmost pilot shaft is used as a drilling head or thrust bearing, and the last pilot shaft is used as a driving device or drilling die. The excavation device for burying a pipe according to claim 1, wherein the excavation device is detachably connected. 4. The excavating die has a rotary shaft portion provided with an excavating die, and a pilot shaft is detachably connected to a front portion and a screw shaft is detachably connected to a rear portion of the excavating die. An excavation device for burying a pipe as described. 5. A screw shaft having a through hole for high pressure water,
For the discharge pipes installed around it, prepare one or more pipes with a set length, and use the foremost screw shaft as a digging die.
The pipe digging device according to claim 1, wherein the last screw shaft is detachably connected to the prime mover. 6. A hydraulic cylinder device A comprising: (a) a pilot shaft having an excavation head mounted at its tip, which is rotationally driven by a prime mover.
Press the button to sequentially connect the pilot shafts to excavate the pilot shaft, and penetrate the required span with one or more connected pilot shafts. (B) Remove the excavation head and remove the shaft end. , Connect to the thrust bearing attached to the hydraulic cylinder device B, connect the excavation die, the screw shaft and the discharge pipe around it to the rear end of the pilot shaft connected to one or more, and connect the rear end of the screw shaft to the driving device. (C) One or more units connected in series between the thrust bearing and the prime mover, that is, between A and B, by the action of the speed difference of hydraulic cylinder devices A and B, where B is larger than A. For the pilot shaft, excavation die, and one or more screw shafts,
While maintaining a constant tension on the same axis by applying a tension of a set value at all times (d), each member is rotated by the prime mover, pressed by the hydraulic cylinder device A, and pulled by B. , Excavating with a excavating die, discharging the mud-like soil outside the excavating mine with the screw shaft and discharge pipe, (e), as the excavation progresses, remove the pilot shaft in sequence, and screw shaft and discharge A method for excavating and embedding a pipe by an excavating device for pipe embedding, characterized in that the pipes are connected (f), and the embedded pipes are pushed into the excavation mine one after another by the hydraulic cylinder device A. .