JPS6224575B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double pipe drilling machine with and without water for digging holes in the soil.

Conventionally, this type of equipment has covered the hole with a rubber tube that closes the outside of the hole where water or a solvent such as a soil hardening agent is ejected, and uses the ejection pressure to spread the rubber and make it eject. The structure was such that the rubber was expanded under pressure and water or solvent was ejected.

Therefore, the rubber itself tends to deteriorate and harden due to soil or muddy water, and the hardening agent of the soil often remains on the rubber and the spout, resulting in a short lifespan of the rubber.

The present invention has been made for the purpose of eliminating such drawbacks and providing an apparatus that enables both waterless and wet digging, and the gist of the present invention is to provide a device that enables waterless digging and wet digging. A spout pipe is provided with an inner pipe connected to the inner lower part of the upper outer pipe, and an upper spout and a middle spout are formed in the spout, a partition is provided at the bottom of the middle spout, a lower spout is opened below the partition, and the spout is A connecting part of the pipe is connected in the middle of the upper outer pipe, a flow path is formed in the connected part, and the ends are separated between the connecting pipe provided below the ejection pipe and the upper outer pipe, and the flow path is formed. a gap communicating with the jet pipe is provided, a moving pipe for closing the upper or middle jet port is fitted to the outer periphery of the jet pipe so as to be movable up and down, and a push-up spring is provided below the moving pipe;
This double-pipe drilling machine with water and no water is characterized in that a drilling body is provided below the connecting pipe, and the drilling body is provided with a spout that communicates with the jet pipe.

The present invention will be described in detail below based on one embodiment.

In addition, in the drawings, the present invention performs excavation in the vertical direction with the sharp end on the left as the lower end, and is illustrated in approximately the actual size.

In the present invention, an inner pipe 3 is provided inside an upper outer pipe 1 with a gap 2 therebetween, and an upper spout 5 and a middle spout 6 are connected to a spout pipe 4 to which the inner pipe 3 is connected to the lower part of the inside of the upper outer pipe 1.
is opened, a partition part 8 is provided at the bottom of the middle spout 6,
A lower spout 7 is provided below the partition 8, a connecting portion 9 of the spouting pipe 4 is connected to the middle of the upper outer tube 1, and a flow passage 10 formed by, for example, a vertical groove is provided in the connecting portion 9.
A gap 11 is provided between the connecting pipe 12 provided below the ejection pipe 4 and the upper outer pipe 1 with their ends separated, and an upper ejection port 5 or a middle ejection port is formed on the outer periphery of the ejection pipe 4. A push-up spring 14 is provided below the moving pipe 13, which fits the moving pipe 13 that closes the moving pipe 6 so as to be movable up and down.
Provided so that the upper end of the moving tube 13 is located below the gap 11 when the moving tube 13 is pushed down to the lowest point,
A spear-shaped excavation body 15 is provided below the connecting pipe 12, and a spout 16 communicating with the spout pipe 4 is bored in the excavation body 15.

The number of ejection ports 16 is not particularly limited, and may be an appropriate number depending on the object of the excavated body. In the figure, reference numerals 17 and 19 are double connecting tubes connected to the upper outer tube 1 and sealed to the inner tube 3 by an O-ring 18.

Next, the operation of the present invention will be explained. When excavating without water, the entire present invention is rotated while excavating.
Further, when excavating with water, the excavation is performed while spouting water from the spout 16. In this case, double connecting pipe 1
Pour water into the inner tube of 7. At this time, the moving pipe 13 is pushed upward by the force of the spring 14 and closes the upper spout 5. Therefore, the double connecting pipe 17
~The water that has come to the inner pipe 3 through the spout pipe 4 is spouted from the middle spout 6, returns to the spout pipe 4 from the bottom spout 7, and is spouted from the spout 16 of the excavating body 15, and is pumped while rotating the entire body. A hole is rapidly dug into the soil by the jet water being pumped by the system.

Next, in a soil hardening method, for example, when silicic acid and a hardening agent such as cement are mixed and injected, silicic acid is first sent into the pipe outside the double connecting pipe 17 using a pump or the like. Further, a curing agent or the like is sent into the inner pipe of the double connecting pipe 17. Here, silicic acid passes through the flow pipe 13 through the gap 2 and the flow path 10 provided at the connection part 9 between the upper outer pipe 1 and the jet pipe 4.
reaches the top of the . At this time, since the silicic acid is fed under appropriate pressure by a pump or the like, the moving tube 13 is pushed down against the force of the spring 14 due to the pressure of the silicic acid. Therefore, the middle spout 6 of the spout pipe 4 is closed and the upper spout 5 is opened at the same time. At this time, the upper end of the moving tube 13 moves below the gap 11 between the upper outer tube 1 and the connecting tube 12, as shown in FIG. Therefore, the curing agent, etc. in the ejection pipe 4 is ejected from the upper ejection port 5, and is mixed with silicic acid and ejected out of the pipe from the gap 11, causing the entire body to rotate, thereby hardening the soil near the inner wall of the hole. used for.

The mixing ratio of the solvent and silicic acid can be changed by changing the pressure of the solvent such as the above-mentioned curing agent and the silicic acid, and it is also possible to obtain a mixing ratio depending on the soil.

As described above, the present invention provides the upper spout 5 and the middle spout 6 in the spout pipe 4, the partition part 8 at the lower part of the middle spout 6, and the lower spout 7 below the partition part 8.
At the same time, attach a spring 1 to the outer periphery of the jet pipe 4.
4 is pushed up to close the upper spout 5, or when it descends, it closes the middle spout 6. Therefore, when water is sent into the inner pipe 3, the flow pipe 13 closes the upper spout 5. Since the outlet 5 is closed, water does not spout out from the gap 11, and the water passes through the middle spout 6, the lower spout 7, and is jetted out from the spout 16 for effective excavation. When sending drugs,
When silicic acid is sent from the outside of the double connecting pipe 17, the moving pipe 13
is pressed down and the middle spout 6 is closed.
The curing agent sent to the inside of the double connecting pipe 17 later is transferred to the upper jet port because the middle jet port 6 is closed by the moving pipe 13 and does not flow into the jet port 16 due to the partition part 8. 5, and the silicic acid and curing agent can be jetted out from the gap 11. Therefore, the upper spout 5, the middle spout 6, the lower spout 7, and the partition part 8 reliably change the spouting position of water and the spouting position of silicic acid and curing agent to effectively perform excavation or soil hardening. can do.

Moreover, since the excavation body 15 is provided with a spout 16 that communicates with the spout pipe 4, and there is nothing to block the force of water between the lower spout 7 and the spout 16, the water can be spouted out with great force and be effective. can be excavated.

Moreover, since the end of the upper outer tube 1 and the end of the connecting tube 12 are separated from each other to provide a gap 11 communicating with the flow path 10, there is a gap 11 along the outer periphery of the upper outer tube 1 and the connecting tube 12. The silicic acid and hardening agent in the flow path 10 are diffused and ejected to the surroundings, and the soil can be effectively hardened.

Therefore, according to the present invention, it is possible not only to perform waterless trenching, but also to inject a chemical solution after the waterless trenching.

Ordinary trenching with water can also be performed by spouting water from the trenching section at the tip.

Furthermore, according to the present invention, the structure is such that a solution such as a hardening agent is ejected from the gap between the pipe bodies, and since rubber or the like is not used as in the past, there is no shortening of life due to corrosion, deterioration, etc., and there are no defects. During use, the gap through which the hardening agent and other solvents spout is closed, thereby preventing the intrusion of soil, etc., and since the hardening agent and silicic acid are fed separately, there is no clogging of the inside of the pipe by the hardening agent.
It is also possible to change the mixing ratio by changing the pressures of the curing agent and silicic acid, and since the structure itself is simple, it has excellent effects such as being able to be produced in large quantities at low cost.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view of the present invention, FIG. 2 is a partially cutaway sectional view of the same, FIG. 3 is a left side view of the present invention, and FIG. Diagram A
-A sectional view, Figure 5 is a BB sectional view in Figure 2,
FIG. 6 is a sectional view taken along the line CC in FIG. 1 is an upper outer pipe, 2 is a gap, 3 is an inner pipe, 4 is a jet pipe, 5 is an upper jet port, 6 is a middle jet port, 7 is a lower jet port, 8 is a partition part, 9 is a connection part, 10 is a Flow passage (vertical groove), 11 is a gap, 12 is a connecting pipe, 13 is a moving pipe, 14 is a spring, 15 is a drilling body, 16 is a spout, 17 and 19 are double connecting pipes, and 18 is an O-ring.

Claims (1)

[Claims] 1. Provide an inner pipe with a gap inside the upper outer pipe,
An upper spout and a middle spout are formed in the spout pipe which is connected to the inner pipe inside and below the upper outer pipe, a partition is provided at the bottom of the middle spout, and a lower spout is opened below the partition. A connecting part is connected in the middle of the upper outer pipe, a flow passage is formed in the connecting part, and the ends are separated from each other between the connecting pipe provided below the ejection pipe and the upper outer pipe to communicate with the flow passage. A gap is provided to close the upper or middle outlet, and a moving pipe that closes the upper or middle outlet is fitted to the outer periphery of the ejecting pipe so that it can move up and down.A push-up spring is provided below the moving pipe, and an excavation body is placed below the connecting pipe. A double pipe drilling machine with and without water, characterized in that the excavation body is provided with an ejection port that communicates with an ejection pipe.