JPS61274092A - Horizontal boring 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] (Industrial Application Field) The present invention relates to a horizontal boring machine that is propelled towards a leading pipe as it excavates with an auger shaft, such as a water/sewage pipe or an electric power cable. It is used for burial.

(Conventional technology) Conventional horizontal boring machines are designed to excavate only with an auger, so if you want to increase the drilling efficiency, you can consider increasing the rotation speed of the auger.
This increases the load on the auger head, and if the thrust length becomes long, there is a limit to how fast the rotation speed can be increased.

(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and its purpose is to improve excavation efficiency by cooperating the auger and jet water. To provide a horizontal boring machine which can operate an auger in the same manner as before and does not complicate work.

(Means for Solving the Problems) The present invention positions the auger 2 in the leading pipe 1, and as the auger 2 rotates, the leading pipe 1 In a horizontal boring machine that propels a hollow auger shaft 4, a hollow inner shaft 5 is provided coaxially with the axis of the auger shaft 4. 6, a jet pipe 7 is arranged on the outer periphery of the inner shaft 5, a sand suction nozzle 11 is formed toward the discharge path 6, and this sand suction nozzle 11 is connected to the jet supply hose 12 of the starting part 3, On the other hand, an excavation nozzle 8 and a recovery port 9 for excavated soil are provided on the auger head 10, the tip of the jet pipe 7 is connected to the excavation nozzle 8, and the base end of the jet pipe 7 is connected to the jet supply hose 12 of the starting part 3, The gist of this horizontal boring machine is that the tip of the inner shaft 5 is connected to the recovery port 9, and the base end of the inner shaft 5 is connected to the discharge pipe 13 of the starting section 3.

(Example) Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows an overall view of a horizontal boring machine, which has both an auger 2 as an excavator and a jet water J as an excavator.

Excavation means using the auger 2 is formed by attaching the auger 2 and the leading pipe 1 to a starting part 3, and the starting part 3 is composed of an auger driving means 14 and a propulsion means 15. Then, as shown in Figure 5 (al), start the boring machine
, and excavate by rotating the auger 2 and jet water, which will be described later, and then propel the auger 2 and the leading pipe 1.
Sequentially replenish the auger 2 and leading pipe 1 before reaching the reaching hole C, and then insert the hump pipe 23 after the auger 2 and leading pipe 1 as shown in the same figure (bl). In the figure, 16 is a rotating part motor, 17 is a spindle cylinder, 18 is a propulsion cylinder, 19 is a drive spindle, 20 is a slide base, 21 is a propulsion head, 22 is a power wrench, and 24 is wound around the outer circumference of the auger shaft 4. It is a spiral blade.

Next, the excavation means using jet water will be explained. The auger shaft 4 of the auger 2 is hollow, and a hollow inner shaft 5 is disposed within the auger shaft 4, and is supported so that the axis of the auger shaft 4 is coaxial with the inner shaft 5. It is supported within the auger shaft 4 by means. Of the auger shaft 4,
A jet pipe 7 (7a, 7b) is arranged on the outer periphery of the inner shaft, and the inside of the inner shaft 5 is used as a discharge path 6 for excavated earth and sand. 1
0 is an auger head having a recovery port 9 for excavated earth and sand in the center, and an excavation nozzle 8 formed around the recovery port 9. The tip of the inner shaft 5 is connected to the recovery port 9 of this auger head 10, and the jet pipe 7a
The tip thereof is connected to the drilling nozzle 8.

FIG. 2 is an enlarged cross-sectional view of the hollow drive spindle 19, in which the base of the inner shaft is introduced, and the end of the base of the inner shaft 5 is bent to fit around the outer periphery of the drive spindle 19. It is connected to a drilled outlet 25. Further, an annular jet water introduction chamber 26 is provided around the outer periphery of the base of the inner shaft 4, and a jet water introduction passage 27 within this jet water introduction chamber 26 is provided. The base ends of the jet pipes 7a and 7b are opened into the jet water introduction passage 27, and the jet water introduction chamber 2
6 drive spindle 19 has drive spindle 1
A slit hole 28 for introducing jet water is formed around the entire circumference of the jet water. Note that the jet water introduction slit hole 28 may be formed into a round hole. This jet water introduction slit hole 2 and the jet supply hose 12 communicate with each other through a so-called swivel structure. That is, the outer cylinder 29 is loosely fitted into the drive spindle 19 so that the drive spindle 19 can rotate freely, and the one-sided cylinder 29 has a round jet water introduction hole 30 that is connected to the jet water introduction slit hole 2.
It is formed corresponding to 8. Therefore, the jet water J enters the jet water introduction path 27 from the jet supply hose 12 through the jet water introduction slit hole 28 and the jet water introduction hole 30, passes through the jet pipe 7a, and enters the excavation nozzle 8.
It is injected towards stratum G. 31 is Patsukin, 32
is a bearing. In addition, the discharge port 25 and the discharge pipe 13
It is connected by a swivel structure. 34 is an outer cylinder in which a discharge hole 35 is provided.

Reference numeral 11 denotes a sand suction nozzle formed in the recovery port 9 of the auger head, and is connected to the tip of the suction jet pipe 7b.

Next, the drilling operation by the jet of the horizontal boring machine will be explained.

When jet water J is supplied from a pump (not shown) to the horizontal boring machine A through the jet supply hose 12, the jet water J is injected from the drilling nozzle 8 through the jet pipe 7a to excavate the stratum G, as shown in FIG. do. At the same time, suction jet water from the earth and sand suction nozzle 11
The excavated earth and sand and the jet water J for excavation are recovered by the injection, and are discharged to the outside from the discharge pipe 13 through the discharge passage 6. Also, during this operation, the auger 2 rotates and the cutter 36 continues to excavate.

Note that the position of the earth and sand suction nozzle 11 is not specified.

Further, the augers 2 are successively added according to the length of excavation, and it goes without saying that when connecting the augers 2, they are connected to the jet pipes 7a, 7b and the discharge pipe 13 in a watertight manner.

Reference numeral 37 denotes a chemical liquid conveying hose, and numeral 38 denotes a chemical liquid pipe, through which the chemical liquid for ground hardening is sprayed onto the collapsed portion from the auger head 10 as shown in FIG.

(Effects) As described above, the present invention provides a hollow inner shaft within the hollow auger shaft coaxially with the axis of the auger shaft, and uses the inside of the inner shaft within the auger shaft as a discharge path for excavated earth and sand. At the same time, a jet pipe is arranged around the outer circumference of the inner shaft, and a dirt suction nozzle is formed toward the discharge path, and this dirt suction nozzle is connected to the jet supply hose of the starting part, while an excavation nozzle and excavated dirt recovery pipe are installed on the auger head. At the same time, connect the tip of the jet tube to the excavation nozzle, connect the base end of the jet tube to the jet supply hose of the starting part, connect the tip of the inner shaft to the recovery port, and connect the base end of the inner shaft to the recovery port. Since it is connected to the discharge pipe of the starting part, it becomes possible to excavate the stratum by injecting jet water from the drilling nozzle of the auger head through the jet pipe in the auger shaft, and therefore excavation by the cutter attached to the auger bed. It becomes possible to work together with excavation using jet water, which has the effect of dramatically improving excavation efficiency. In addition, the excavated earth and sand are discharged from the recovery port through the recovery channel by the suction nozzle together with the jet water for excavation.
Therefore, the strata will not loosen due to jet water,
Even when jet water is used, there is no adverse effect on the strata. Furthermore, since the recovery channel and jet pipe are housed inside the hollow auger shaft, there is no problem with the auger's excavation operation and the spiral blades' recovery of excavated soil, allowing for smooth cooperation with the auger. be effective.

[Brief explanation of the drawing]

Figure 1 is a front view of the horizontal boring machine of the present invention, Figure 2 is a front view of the horizontal boring machine of the present invention;
The figure is an enlarged sectional view of the part A in Fig. 1, Fig. 3 is an enlarged sectional view of the mouth part in Fig. 1, Fig. 4 is a 2-2 sectional view of Fig. 3, and Fig. 5 is an enlarged sectional view of the mouth part in Fig. Cross-sectional views of the bar, FIGS. 6(a) and 6(b) are diagrams showing the excavation operation by the horizontal boring machine of the present invention. 1.-Leading pipe, 2-Auger, 3-Starting part, 4-Auger shaft, 5-Inner shaft, 6--Discharge path, 7--Jet pipe, 8--Drilling nozzle, 9--Recovery Port, 10--auger head, 11--earth suction nozzle, 12--jet supply hose, 13--discharge pipe

Claims (1)

[Claims] (1) In a horizontal boring machine in which an auger is positioned inside a leading pipe and the leading pipe is propelled by the rotation and propulsion of the auger from a starting part that has an auger driving means, propulsion means, etc., the auger shaft is placed inside a hollow auger shaft. A hollow inner shaft is provided coaxially with the shaft core, and the inside of the inner shaft of the auger shaft is used as a discharge path for excavated soil.A jet pipe is arranged around the outer circumference of the inner shaft to suck the soil and sand toward the discharge path. A nozzle is formed, and this earth and sand suction nozzle is connected to the jet supply hose of the starting part.On the other hand, an excavation nozzle and a collection port for excavated earth and sand are provided on the auger head, and the tip of the jet pipe is connected to the excavation nozzle. A horizontal boring machine characterized in that a base end is connected to a jet supply hose of a starting part, a tip of an inner shaft is connected to a recovery port, and a base end of the inner shaft is connected to a discharge pipe of a starting part.