JPS6240507B2 - - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD This invention relates to drilling equipment.

Conventionally, when drilling holes, tunnels, wells, etc. for construction work, there have been problems in that noise and vibration are generated, the work efficiency is poor, and the drilling equipment is complicated and expensive. In addition, in order to run underground pipes for passing electric wires, water pipes, sewer pipes, etc. underground, it is necessary to dig the ground and bury them. There was no equipment.

This invention solves these problems and allows various holes to be excavated without noise or vibration.
Moreover, the present invention provides an extremely simple structure, efficient excavation, and inexpensive excavation equipment.

Embodiments of the present invention will be described below with reference to the drawings.

In one embodiment of the invention shown in FIGS. 1 to 4, 10 is a compressor serving as a source of compressed air.

Reference numeral 11 denotes a mixed flow forming device, which is constructed as described below. That is, 12 is a support stand. 1
Reference numeral 5 denotes a pipe provided on the support base, and has a connecting port 17 connected to the compressor 10 via a hose 16. 18 is valve 2 on this pipe
The casings are connected via 0. Reference numeral 21 indicates a central member disposed within the casing; 22 indicates a plurality of guide vanes arranged radially between the central member and the inner surface of the casing 18 and inclined so as to guide air in a predetermined rotational direction; and 23, a casing; 18
This is a mixed flow pipe that connects and extends to the outlet of the pipe. When the valve 20 is opened, compressed air from the compressor 10 flows into the casing 18, is guided by the guide vanes 22, forms a high-speed swirling flow, and is sent out through the mixed flow pipe 23. . 27 is a tank whose lid 28 is opened to accommodate hard granular materials 90 such as sand, and the lower part is connected via a pipe 30 and a valve 31 to a mixed flow pipe 23 through which a swirling air flow passes. .
A pipe 35 extends from the upper part of the pipe 15 through the tank 27 and opens downward into the lower part of the tank 27, and is provided with a valve 36. Therefore, when the swirling air flow is passing through the mixed flow pipe 23 at high speed, the valves 31 and 3
6 is opened, the particulate matter 90 in the tank 27 is supplied into the mixed flow pipe 23, becomes a mixed flow together with air, and is sent out at high speed while swirling.

Reference numeral 38 denotes a jetting device, which is constructed as described below. That is, 40 is a jet pipe, which is connected to the mixed flow pipe 23 of the mixed flow forming device 11 via a hose 41, and directs a mixed flow of swirling particulate matter 90 and air from the jet port 42 toward the part to be excavated 91. Once ejected, the granules 90 excavate this excavated portion to form a hole 99. 4
Reference numeral 3 denotes a cylindrical member that extends longer than the ejection port 42 by passing through the ejection pipe 40 and surrounding the ejection port 42. The distal end is open and the rear end is closed with an end surface portion 44. This cylindrical member is provided to limit the range of the swirling mixed flow ejected from the ejection port 42. A screw 45 is cut into the jet pipe 40 at a portion that passes through the end surface 44 of the cylindrical member 43, and is screwed into a female thread 46 provided on the end surface 44 to enable adjustment by moving forward and backward within a predetermined range. . 47 is a space formed in the cylindrical member 43, and an annular suction port 48 is provided in the cylindrical member.
is formed. Reference numeral 50 denotes a hose connected to the space 47 and led out to the outside, and is configured to suck air, particulate matter 90, and excavated matter from inside the cylindrical member 43 using a blower 51 and discharge it.

In the configuration as described above, the swirling mixed flow of air and particulate matter 90 efficiently excavates the excavated portion 91 to approximately the diameter of the cylindrical member 43 to form the hole 99, Excavated part 91
Even if the material is soft, it can be excavated well. When excavating the hole 99 in a downward direction, the ejection device 38 can be lowered by its own weight, but when excavating a horizontal hole, an appropriate means for pushing the ejection device 38 forward may be used.

In another embodiment of the invention shown in FIGS. 5 and 6, the cylindrical member 43 is formed hollow by a space 52, and compressed air is supplied through a hose from a compressor (not shown). By discharging water at high speed from an annular discharge port 53 formed along the tip, it is possible to prevent the periphery of the excavated portion 91 from collapsing and expanding, and to prevent water from flowing in. Therefore, a large amount of air flows in and the air and particulate matter 9
In order to prevent the speed of the mixed flow of 0 from decreasing, a suction pipe 54 is provided that penetrates the circumferential surface of the jet pipe 40, extends past the jet port 42, and opens in the center. The air is sucked in by a blower (not shown) through a suction pipe 56 from 55 and a hose (not shown). This embodiment is suitable when the area to be excavated has a lot of moisture or when excavating sandy soil.

In another embodiment of the present invention shown in FIG. 7, a metal cylindrical body for preventing collapse is fitted into the hole while the hole is being excavated. A screw 60 is cut on the outer periphery of the cylindrical member 43, and a female screw 62 cut on the metal cylindrical body 61 at the tip is screwed into the screw 60, and excavation is performed while the screw 60 is first fitted into the outside of the cylindrical member 43. hole 9
As the depth of the cylindrical member 4 increases, an appropriate number of metal cylindrical bodies 63 are screwed together and excavated, and finally the cylindrical member 4
3, the screw 60 is removed from the female thread 62 and removed, leaving the take-out cylinders 61 and 63. When such cylindrical bodies 61 and 63 are used, as the hole 99 becomes deeper, the cylindrical members 61 and 63 can be pushed forward by an appropriate means (not shown) to advance the cylindrical member 43.

In each of the embodiments described above, the mixed flow of air and particulate matter 90 is designed to have a swirling motion, but instead of using such a swirling motion, a mixed flow of particulate matter and air that simply moves forward at a high speed is used. Although the general excavation efficiency is inferior to the illustrated and described embodiment, it is suitable for excavating particularly hard places.

Further, in the present invention, water may be used instead of air as the fluid that forms the mixed flow with the particulate matter 90,
Alternatively, both air and water can be used at the same time. In this way, when water is used to excavate a soft place, the excavated material dissolves in the water and becomes muddy water, which can be discharged very easily. When a mixed flow containing water is used to drill the hole 99 in the downward direction, the hole may be formed without closing the rear end of the cylindrical member 43 with the end surface 44; In such a case, a hose may be inserted to suck in the muddy water coming above the cylindrical member 43 in the excavated hole 99 regardless of the spouting device 38.

In the present invention, a mixed flow forming device 11 that supplies compressed air and particulate matter 90 to form a mixed flow may be integrally provided at the upper part of the jet pipe 40, and the swirling movement of the air is as shown and explained. It may also be done by different means.

As described above, the present invention has an extremely simple structure, and has the advantage that the hole 99 can be excavated easily and efficiently without noise or vibration.

In this invention, the use of a swirling mixed flow makes it possible to drill the hole 99 with particularly high efficiency.

In addition, in the case of excavating an uneven place in this invention, a ring-shaped packing made of a soft material such as rubber is fitted on the outside of the cylindrical member 43 to prevent the mixed flow from flowing out while excavating. Starting hole 9
As the depth of the cylindrical member 9 increases, only the cylindrical member 43 may move forward, and the packing may be removed from the cylindrical member and remain in the initial position. Further, the excavating device of the present invention may be used for the purpose of a rock drill by using particularly hard granules 90 to drill holes in rocks and the like.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention in use, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a plan view of the ejection device. 4 is a bottom view thereof, FIG. 5 is a plan view showing another embodiment of the ejection device of the present invention, and FIG.
FIG. 7 is a partially cutaway front view showing another different embodiment of the present invention in use. 10 is a compressor, 11 is a mixed flow forming device, 18 is a casing, 22 is a guide vane, 23 is a mixed flow pipe, 27 is a tank, 38 is a blowout device,
40 is a jet pipe, 42 is a spout, 43 is a cylindrical member, 44 is an end face, 48 is a suction port, 50 is a hose, 51 is a blower, 52 is a space, 53 is a discharge port, 90 is a granular material, 91 is the part to be excavated, and 99 is the hole.

Claims (1)

[Scope of Claims] 1. A mixed flow forming device that forms a high-velocity mixed flow of a large number of hard particles and a fluid that holds the particles, a jet pipe that ejects the mixed flow from this mixed flow forming device, and An excavation device comprising: a jetting device having a cylindrical member surrounding a spout of a spout pipe and extending longer than the spout. 2. The excavation device according to claim 1, wherein the ejection device is provided with an end face portion that closes between the outside of the ejection pipe and the cylindrical member, and the excavation device An excavation device characterized by including a suction means that penetrates an end face portion and sucks the suction. 3. The excavation device according to claim 1 or 2, wherein a hollow space is formed in the cylindrical member so that fluid is discharged along the tip. 1. An excavation device comprising a discharge port and means for delivering pressurized fluid into the space. 4. A mixed flow forming device that forms a high-velocity mixed flow that is sent out while rotating a large number of hard particles and a fluid that holds the particles, and a jet pipe that ejects the mixed flow from this mixed flow forming device. and an ejection device having a cylindrical member surrounding the ejection port of the ejection pipe and extending longer than the ejection port. 5. The excavation device according to claim 4, wherein the ejection device is provided with an end face portion that closes between the outside of the ejection pipe and the cylindrical member, and the excavation device An excavation device characterized by including a suction means that penetrates an end face portion and sucks the suction. 6. The excavation device according to claim 4 or 5, wherein a hollow space is formed in the cylindrical member so that fluid is discharged along the tip. 1. An excavation device comprising a discharge port and means for delivering pressurized fluid into the space.