JP2599436Y2 - Ultra high-pressure hardening material injection device for drilling water - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling water / ultra-high pressure hardening material jetting device for ultra-high pressure cutting of a deep underground by ultra high pressure jetting.

[0002]

2. Description of the Related Art In general, an injection device for drilling water and a high pressure hardening material
Is mounted on the tip of a rod that is inserted deep into the ground
Jet grout nozzle body. This nozzle body for jet grout has a flow path for drilling water and ultra-high pressure hardening material injection and a flow path for compressed gas formed in the body main body. An ultra-high pressure injection nozzle is provided at the end of the road, and around the ultra-high pressure injection nozzle,
Although it has a structure provided with a compressed gas injection nozzle, in the jet grout method, the nozzle body is inserted into a deep part of the ground to a predetermined depth, and a formation hole made of underground hardened material is made while performing ultra-high pressure injection . At this time, an underground hardening material or cutting slime may flow back into the compressed gas injection nozzle of the nozzle body, causing an accident that the compressed gas injection cannot be performed. Therefore, a check valve structure is required. I have. In order to solve such a problem, for example, a jet grout nozzle body is known as shown in Japanese Utility Model Publication No. 57-36688.

FIG. 2 shows a jet grout nozzle body of this type. In the drawing, reference numeral 21 denotes a body main body, and the body main body 21 has a flow path 22 for drilling water and super high pressure hardening material injection, and a flow path 22 for drilling water and ultra high pressure hardening material injection. The compressed gas flow path 23 is formed.
The compressed gas channel 23 is provided with a compressed gas supply
Compressed air began to flow from the supply device (not shown)
I have.

[0004] An ultra-high pressure injection nozzle 24 is provided at the tip of a channel for drilling water and for injection of an ultra-high pressure hardening material. It reaches the outer wall surface 21A of the body main body 21 and opens to the outside.

[0005] An air nozzle 27 having a hole of a predetermined diameter surrounding the ultra-high pressure injection nozzle 24 is provided around the ultra-high pressure injection nozzle 24, and the outer peripheral end of the air nozzle 27 has a body body. 21. Around the ultrahigh-pressure injection nozzle 24, a lip stopper 25 and a lip valve 26 are arranged in order from the compressed gas flow path 23 to the outside.

The lip stopper 25 includes a lip valve 26
Is located at the rear side of the lip valve 26 adjacent to the lip valve 26 and serves as a stopper of the lip valve 26 pressed to the rear side. A hole is provided in the center to penetrate the ultrahigh-pressure injection nozzle 24, and a plurality of small holes are provided on the peripheral surface.

The lip valve 26 is connected to the compressed gas passage 23.
It communicates with the inside and is configured to be flexible, and its peripheral end is fixed to the hole of the air nozzle 27. In this way, the compressed gas injection nozzle 2 is placed around the ultra-high pressure injection nozzle 24.
8 are formed.

[0008]

[Problems to be Solved by the Invention] However, in the conventional jet grout nozzle body, when constructing by the jet grout method, it is necessary to adjust the amount of compressed air while maintaining a high pressure depending on the target soil quality. Although it is important from the viewpoint of securing the amount of compressed air, the conventional adjustment of the amount of compressed air has been performed by valve control of a compressed gas supply device on the ground.

In this case, the compressed gas supply device
When adjusting the amount of compressed air by the lube control , energy loss occurs, so the supply pressure generated by the compressed gas supply device on the ground decreases downstream of the valve of the compressed gas supply device,
Therefore, although the required amount of compressed air can be obtained, the injection pressure at the compressed gas injection nozzle 28 is extremely low, and the compressed air injection loses the pressure in the formation hole, making it impossible to inject compressed air, and the working depth limit is reduced. There's a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to maintain a high supply pressure of a compressed gas generated by a compressed air rest supply device on the ground while maintaining only a required flow rate. For drilling water that can inject compressed air
An object of the present invention is to provide an ultra-high pressure curing material spraying device .

[0011]

SUMMARY OF THE INVENTION The present invention relates to a drilling water
High pressure curing material injection channel and compressed gas channel are formed
Located on the body and the ground, compressed into compressed gas flow path
Compressed gas supply device for flowing gas, and ultra high pressure curing for drilling water
It is provided at the tip of the material injection flow path and opens outside the body.
The injection nozzle for ultra high pressure and the circumference of the injection nozzle for ultra high pressure
Hole of a predetermined diameter that is provided in the
Part is formed, and the compressed air
Compressed gas is supplied through the body passage without dropping pressure.
Around the air nozzle and the super high pressure injection nozzle
Flexible lip valve that communicates with the inside of the compressed gas passage
And a large number of holes around the ultra-high pressure injection nozzle
Located on the rear side of the lip valve adjacent to the lip valve.
Lip stopper, and open the nozzle in the hole of the lip stopper.
The cross-sectional area of the port is set according to the required flow rate of the compressed gas.
So that it can be replaced in the air nozzle
And a lip stopper .

[0012]

[Function] In the present invention, a compressed gas supply device on the ground is used.
The compressed gas that is generated keeps its supply pressure
Supplied to lip stopper of jet grout nozzle body
Is done. Here, the compressed gas does not drop pressure from the ground
Provide the jet grout nozzle body with strong pressure.
Is supplied and ejected against the pressure in the formation hole. And
The lip stopper opens the nozzle in the hole of the lip stopper.
The cross-sectional area of the port is set according to the required flow rate of the compressed gas.
So that it can be replaced on the inner wall of the air nozzle.
Lip with different nozzle opening cross-sectional area of the hole
By replacing the stopper, the hole of the lip stopper
Is controlled by the lip stopper
Compression at high flow rate and strong enough to drop pressure from the ground
Gas is ejected from the hole of the lip stopper.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a diagram showing an embodiment of the present invention for drilling water and ultra high height.
3 shows a nozzle body for jet grout of a pressure hardening material injection device .

In the drawings, reference numeral 1 denotes a body main body,
In this body 1, a flow path 2 for drilling water and ultra-high pressure hardening material injection and a flow path 3 for compressed gas parallel to the flow path 2 for drilling water and ultra-high pressure hardening material injection are formed. ing.

An ultra-high pressure injection nozzle 4 is provided at the tip of the drilling water / ultra-high pressure hardening material injection channel 2. The ultra-high pressure injection nozzle 4 is made of a cemented carbide in order to ensure abrasion resistance. Become
The distal end of the gas passage penetrates the compressed gas flow path 3 and reaches the outer wall surface 1A of the body main body 1, and is open to the outside.

Around the ultra-high pressure injection nozzle 4, a lip stopper 5, a lip valve 6, and an air nozzle 7 are sequentially arranged from the compressed gas flow path 3 to the outside. The lip stopper 5 is provided in the air nozzle 7 so as to be replaceable, and functions as a stopper of the lip valve 6 pressed rearward, and is formed in a disk shape.
The lip stopper 5 is provided with a hole at the center to penetrate the ultrahigh-pressure injection nozzle 4 and a plurality of holes 5A on the peripheral surface. Although the total opening cross-sectional area of the hole 5A is configured to be adjustable in accordance with the required ejection flow rate,
It is determined experimentally by the required flow rate and is selected appropriately.
In this case, a plurality of lip stoppers 5 of various hole portions 5A having different total opening cross-sectional areas are prepared.
Is replaced, the total opening cross-sectional area of the hole 5A is adjusted.

The lip valve 6 is provided in the air nozzle 7 and communicates with the inside of the compressed gas passage 3 so as to be flexible, and its peripheral end is fitted inside the inner wall surface of the air nozzle 7. I have. The fabrication hardness of the flexible is experimentally determined in relation to the flow rate.

The air nozzle 7 is made of hard steel.
A disk 7A having a size large enough to cover the lip valve 6 is formed in a cylindrical shape with a tip formed, and a hole 7B having a predetermined diameter is formed in the disk 7A. The lip valve 6 is protected in the air nozzle 7. Even if the lip valve 6 tries to open outward due to the pressure of the compressed air in the compressed gas passage 3, the air nozzle 7 acts as a stopper and The deformation of the valve 6 is restricted. The direction of the compressed air is controlled by the air nozzle 7.

Thus, the compressed gas injection nozzle 8 including the lip valve 6 and the air nozzle 7 is formed around the ultra-high pressure injection nozzle 4. Thus, in the present embodiment, the cross-sectional area of the nozzle opening of the hole 5A of the lip stopper 5 can be adjusted in accordance with the required ejection flow rate of the compressed air in the compressed gas flow path 3 under a predetermined pressure. Therefore, by changing the nozzle opening cross-sectional area of the hole 5A of the lip stopper 5, the pressure from the compressed gas supply device on the ground can be reduced.
Compressed air of a required flow rate is blown out from the hole 5A of the lip stopper 5 without dropping .

Then, compressed air having a required strong pressure is supplied from the inside of the lip valve 6 through the compressed gas passage 3 to the ground.
It is supplied to the jet grout nozzle body while maintaining a strong pressure to reduce the pressure from the compressed gas supply device ,
It is ejected against the pressure in the formation hole.

According to the above-described configuration, the cross-sectional area of the nozzle opening of the hole 5A of the lip stopper 5 is determined by the
It has become adjustable to correspond to the required ejection flow rate at a given pressure of the compressed air in the inner, ground in a conventional Bal
Energy loss at the time of adjusting the valve can be eliminated. Therefore, in the jet grout nozzle body, from the compressed gas supply device on the ground through the hole 5A of the lip stopper 5
Thus, there is an effect that compressed air of a required pressure and a required flow rate can be adjusted and controlled to be blown out without decreasing the pressure .

That is, it is generated by a compressed gas supply device on the ground.
Without adjusting the flow rate of the compressed air on the ground side ( without losing energy ), the compressed air at the required flow rate is maintained under the same supply pressure up to the ultra-high pressure injection nozzle of the jet grout nozzle body. Can be ejected to the outside by the lip stopper 5 of the jet grout nozzle pod.

Then, compressed air of a required pressure is supplied from the ground to the jet grout nozzle body via the compressed gas flow path 3 while maintaining a high pressure without dropping the pressure from the ground, and is formed from inside the lip valve 6. It is ejected against the pressure in the hole. Therefore, the compressed air can be injected at a predetermined flow rate, and the injection hole is formed to have a large diameter without losing the pressure in the injection hole in the deep underground due to the strong injection from the jet grout nozzle body. In addition to this, it is possible to deepen the construction limit depth of the formation hole.

Further, during the underground injection formation, the jet grout nozzle body is lifted toward the ground while being rotated. At this time, the lip valve 6 is conventionally caused by the horizontal injection of the compressed air. The lip valve 6 is projected in the horizontal direction, for example, directly in contact with the wall surface (ground) of the formation hole, and the lip valve 6 may be damaged during construction. Is regulated by the air nozzle 7, so that the lip valve 6 can be protected and its breakage can be prevented.

Furthermore, in the conventional jet grout nozzle body , the air nozzle and the lip valve are integrated by baking, and the lip valve may be damaged during the construction, and the lip valve may be damaged during construction. Although the check valve effect, which is the object of (1), cannot be achieved, and compressed air injection may not be possible, in this embodiment, since the air nozzle 7 and the lip valve 6 are configured separately, Depending on the degree of wear of each part, only the damaged parts can be replaced each time, the service life can be extended,
In addition, construction costs can be reduced.

In the present embodiment, compressed air is mentioned as an example of the compressed gas, but the present invention is not limited to this.

[0027]

[Effects of the Invention] As described above, according to the present invention,
By adjusting the cross-sectional area of the nozzle opening in the hole of the lip stopper in accordance with the required jet flow rate under a predetermined pressure of the compressed gas in the compressed gas flow path, the conventional ground pressure
Eliminating energy loss at the time of adjustment in the valve of the compressed gas supply device , and controlling and ejecting compressed gas at a required pressure and a required flow rate through the hole of the lip stopper with the nozzle body for jet grout. Can be.

That is, it is generated by a compressed gas supply device on the ground.
Without adjusting the flow rate of the compressed gas on the ground side, the supply pressure (from the compressed gas supply device on the ground) up to the ultra high pressure injection nozzle of the nozzle body for the jet grout
The compressed gas at a required flow rate can be jetted to the outside by the lip stopper of the nozzle body for jet grout while maintaining the pressure (strong pressure that does not decrease the pressure) .

As a result, the formation hole can be formed with a large diameter by powerful jetting from the nozzle body for jet grout, and the depth of the formation hole can be deepened.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention for drilling water and ultra-high pressure hardening.
It is sectional drawing of the nozzle body for jet grouts of a material injection device .

FIG. 2 is a cross-sectional view of a jet grout nozzle body of a conventional drilling water / ultra-high pressure hardening material injection device .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body main body 2 Flow path for drilling water and super high pressure hardening material injection 3 Flow path for compressed gas 4 Ultra high pressure injection nozzle 5 Lip stopper 5A Hole 6 Lip valve 7 Air nozzle

Claims (1)

(57) [Scope of request for utility model registration] 1. A flow path for drilling water and spraying an ultra-high pressure hardening material, and
A body that has a compressed gas channel formed therein and a compression device that is placed on the ground and flows compressed gas to the compressed gas channel.
A gas supply device , provided at the tip of the flow path for drilling water and super high pressure hardening material injection,
An ultra-high pressure injection nozzle opening outside the body body and an ultra-high pressure injection nozzle provided around the ultra-high pressure injection nozzle
A hole with a predetermined diameter surrounding the chisel is formed and compressed
The compressed gas is compressed from the gas supply device through the compressed gas flow path.
An air nozzle that is supplied without reducing the force and a compressed gas flow path that is provided around the super high pressure injection nozzle
A flexible lip valve that communicates with the inside and a number of holes around the ultra-high pressure injection nozzle,
A valve located on the rear side of the lip valve adjacent to the valve
The nozzle opening cross-sectional area of the hole of the lip stopper and the lip stopper
Set the air nozzle so that it is set according to the required flow rate.
With a replaceable lip stopper
Drilling for water and ultra-high pressure curing material injection, characterized in that Eteiru
apparatus.