JPS5991291A - Drilling apparatus - 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] TECHNICAL FIELD This invention relates to drilling equipment.

Conventionally, excavating holes, tunnels, wells, etc. for construction work has had the disadvantages of generating noise and vibration, poor work efficiency, and complicated and expensive excavation equipment. In addition, in order to run underground pipes, water pipes, sewer pipes, etc. for passing electric wires underground, it is necessary to dig the ground and bury them, so it is not practical to dig a hole horizontally underground and move forward. There was no equipment.

The present invention solves these problems and provides a drilling device that can drill various holes without noise or vibration, has an extremely simple structure, can drill efficiently, and is inexpensive. .

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

In one embodiment of the present 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.

Reference numeral 15 denotes a pipe provided on the support base, and has a connection port 17 connected to the compressor 10 via a hose 16. 18 is a casing connected to this pipe via a valve 20. 21 a central member disposed within the casing; 22 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; 23; is a mixed flow pipe connected to and extending from the outlet of the casing 18.

When the valve 20 is opened, compressed air from the compressor 1° flows into the casing 18, is guided by the guide vanes 22, forms a high-velocity swirling flow, and is sent out through the mixed flow pipe 23. There is. 27 is a tank with a lid 28 opened to accommodate hard granular material 90 such as sand, and the lower part is connected to a mixed flow pipe 23 through which a swirling air flow passes through a pipe 30 and a valve 31. .

Reference numeral 35 denotes a pipe which passes through the tank 27 from the upper part of the pipe 15 and opens downward into the lower part of the tank 27, and is provided with a valve 36. therefore,
When the valves 31 and 36 are opened while a swirling air flow is passing through the mixed flow pipe 23 at a high speed, the particulate matter 90 in the tank 27 is supplied into the mixed flow pipe 23 and swirls together with the air to form a mixed flow. However, it will be transmitted at high speed.

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 sends a swirling mixed flow of particulate matter 9o and air through the jet port 42 to the excavated part 91. The particulate matter 90 excavates this excavated portion by ejecting toward the hole 99.

Reference numeral 43 denotes a cylindrical member which extends through the ejection pipe 40, surrounds the ejection port 42, and extends longer than the ejection port 42, and has an open tip and a rear end closed with an end face portion 44.

This cylindrical member is provided to limit the range of the swirling mixed flow ejected from the ejection port 42. The jet pipe 40 has a screw 45 at a portion that passes through the end surface 44 of the cylindrical member 43.
It is notched and can be adjusted by being screwed into a female thread 46 provided on the end face portion 44 so that it can move forward and backward within a predetermined range. 47 is a space formed in the cylindrical member 43, and an annular suction port 48 is formed in the cylindrical member. Reference numeral 50 denotes a hose connected to the space 47 and led out to the outside, through which two particles of air 90. It seems to suck in excavated material and expel it.

In the structure as described above, the excavator rotates and can be excavated satisfactorily even when the excavated portion 91 is soft. When excavating the hole 99 downward, 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 in the space 52 and is connected to a compressor (not shown).

Compressed air is fed through a hose and discharged at high speed from an annular outlet 53 formed along the tip of the hose to excavate the excavated area 91.
When the surrounding area collapses and expands, it is possible to prevent water from flowing in. Therefore, in order to prevent each type of air from flowing in and reducing the speed of the mixed flow of air and particulate matter 90, the suction pipe penetrates the circumferential surface of the jet pipe 40, passes past the jet port 42, and extends into the center for a long time. 54 is provided, and the air is sucked in by a blower (not shown) through a suction pipe 56 and a hose (not shown) from a suction port 55 formed in the end face portion 44. 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 thread 62 cut on the metal cylindrical body 61 at the tip is inserted into the screw 60.
The cylindrical member 43 is rotated and removed with the screw 60 disengaged from the female thread 62, leaving the cylindrical bodies 61 and 63. When using the cylindrical bodies 61 and 63 in this way, the holes 99
As the depth increases, the cylindrical member 43 can be advanced by pushing the cylindrical bodies 61, 63 forward by suitable means (not shown).

In each of the embodiments described above, the mixed flow of air and particulate matter 90 makes 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 for forming the mixed flow with the particulate matter 90, or both air and water may be used simultaneously. 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 downward, the hole may be drilled 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 mentioned above, this invention has an extremely simple structure,
This has the effect that the hole 99 can be excavated very efficiently and easily 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 backing 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. Initially, as the hole 99 deepens, only the tubular member 43 may advance and the backing may exit the tubular 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 the line 2-2 in FIG. 1, and FIG. 3 is a plane view 6-6 of the jet device. Linear sectional view,
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, 2
7 is a tank, 38 is a jetting device, 40 is a jetting 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
90 is a particulate matter, 91 is a part to be ground, and 99 is a hole. Agent Patent Attorney Akira Katsabe

Claims (1)

[Claims] 1. A mixed flow forming device for forming a high-velocity mixed flow of a large number of hard particles and a fluid holding the particles, a jetting pipe for ejecting the mixed flow from the mixed flow forming device, and 1. An excavation device comprising: an ejection device having a cylindrical member surrounding the ejection port of the ejection pipe and extending longer than the ejection port. 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 1. An excavation device comprising a suction means for penetrating an end face portion and sucking the suction. 3. The excavation device according to claim 1 or 2, wherein the cylindrical member has a hollow space formed therein so as to discharge fluid along the tip thereof. 1. An excavation device, characterized in that the excavation device is provided with 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 granules and a fluid that holds the granules, and a jet that ejects the mixed flow by this mixed flow forming device. 1. An excavation device comprising a pipe and an ejection device having a cylindrical member surrounding the ejection port of the ejection pipe and extending beyond the ejection port. 5. The drilling equipment according to claim 4, comprising:
The ejection device is provided with an end surface that closes between the outside of the ejection pipe and the cylindrical member, and the excavation device includes suction means that penetrates the end surface from inside the cylindrical member and sucks suction. drilling equipment. 6. The excavation device according to claim 4 or 5, wherein the cylindrical member has a hollow space formed therein so as to discharge fluid along the tip thereof. 1. An excavation device characterized by being provided with a discharge port and means for delivering pressurized fluid into the space.