JPH1177665A - Vortex tube applied cooling type vacuum boring drill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exclude a cause for obstructing filling of adhesive so far without generating pressure for press-fitting drilling dust in a gap of release parts without intermediary of the dust in the gap by replacing compressed air with ultra- low temperature air by passing the compressed air through a vortex tube, sucking in vacuum the low temperature air from a periphery of a drill bit to a tip of the bit and hollowed drill bit shaft to improve a cooling efficiency of the bit, and reversing a dust discharge route reverse to that of a conventional method. SOLUTION: The air compressed by a compressor 4 is supplied to an air drill 7 and a vortex tube 14. And, the air supplied to the tube is replaced with ultra-low temperature air. The low temperature air is sucked via a hollowed drill bit 8 by an air ejector pump 13 to highly efficiently cool the bit 8 without generating inner pressure to press-fit drill dust in a gap of release parts, and to ensure a filling port without clogging.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for piercing an injection hole when an adhesive is injected into a peeled portion of a tile or a mortar finish layer of a concrete building.

[0002]

2. Description of the Related Art In the conventional drilling method, drilling was generally performed while hitting with a vibrating drill. However, noise generated during the drilling operation caused construction pollution, and the diamond drilling method was used. It was developed into a noiseless drilling method using a drill. Also, the diabit that enabled the noiseless drilling method requires cooling,
The cooling method is as follows: (1) Compressed air is injected from the tip of a hollow drill bit to cool the drill bit and discharge dust. (2) A mist in which compressed air and water are mixed is sprayed from the tip of a hollow drill bit to cool the drill bit and discharge powder. (3) The liquid alcohol is made into a gaseous form, and is injected from the tip of the hollow drill bit. The drill bit is cooled by the heat of vaporization of the alcohol, and at the same time, the powder is discharged to the outside by gas pressure. And other methods for cooling the drill bit and discharging the dust.

[0003]

[Problems to be Solved by the Invention] The conventional noiseless drilling method using a diabit eliminates construction pollution and improves the economics and working efficiency of drilling work by improving the cooling method. Although it cannot be denied, when this perforation method was applied to the installation of an injection port to inject adhesive into the gap between the peeling part of the building frame concrete and the tile or mortar finishing layer, the mortar dust clogged around the perforated hole and adhered Making injection of the agent difficult. This is because compressed air, mist, and alcohol, which are the cooling medium for the diamond drill bit, are injected at high pressure, so that the dust generated during drilling is pushed into the gap between the peeling parts by the injection pressure of the cooling medium and the centrifugal force generated when the drill bit rotates. Therefore, there is a remarkable rate of occurrence of the inhibition of the injection of the adhesive due to the clogging of the milling powder. Therefore, the conventional perforation technique has been completed as a technique for simply making a hole, but when the purpose is to inject an adhesive into a peeling portion, the perforation technique for the injection is not completed yet, and thus a problem is not solved. Is leaving. This problem,
When considering that the purpose of the work of injecting the adhesive is not only the defect of the perforation but also the repair of the peeling part of the building outer wall, the clogging of the injection port keeps the completion of the work purpose and increases the danger of falling on the outer wall. . With the prolonged economic recession and many buildings aging, repairing unfinished exterior walls can pose a social threat.
Each

[0004]

Means for Solving the Problems Various methods of cooling the drill bit have been devised so far. However, in the method of discharging cutting powder at the time of drilling, a compressed gas is discharged from the drill to the tip of the drill bit. It was common in the method of injecting toward. According to this method of discharging cutting powder, when the tip of the drill bit passes through the gap of the peeling portion, and after passing, the cutting powder passes through this gap and is discharged to the outside of the hole. From the principle of pressure, the compressed gas pressure is constant inside the hole, so it contains milling powder, and the pressure of the compressed gas is equal to the pressure going to the outside of the hole. Heading. At that time, the mortar powder of various sizes, which go to the closed narrow gap at once, causes a filtration phenomenon in which the blocks are assembled, causing clogging of the gap and refusing to inject the adhesive.

According to the present invention, the cause of the clogging of the shavings in the gap at the time of drilling is as follows. (1) When the shavings are discharged outside the holes by the high-pressure cooling medium, the discharge path of the shavings is not Has passed. (2) At the time of drilling, there is a high pressure of the cooling medium that pushes the shavings into the gap between the peeling portions in the hole. I thought it was possible. Therefore, in order to secure a low-priced injection port through which the adhesive smoothly penetrates without clogging the gap between the peeling portions, (1) by reversing the flow of the cooling medium of the drill bit, Discharge the dust without intervening even momentarily. (2) At the time of drilling, a vacuum is generated by an air ejector pump to remove the dust by suction, instead of using a positive pressure to push the dust into the gap between the peeling portions in the hole. (3) The cooling medium for the drill bit is slightly higher than the conventional room temperature, and the cooling efficiency of the drill bit is reduced (compressed air). By permeating water into the pores, the adhesive performance of the adhesive is hindered (mist). Although solving the above problems, the running cost is expensive. (Alcohol gas) Instead of applying the cooling effect of air due to eddy current, when compressed air is injected from the center of the T-shaped tube, a vortex of ultra-high speed rotation is generated in the tube, According to the principle that the temperature is lower than the outer peripheral part, the present invention generates a vacuum with the air ejector pump as the cooling medium for the drill bit by the air ejector pump and sucks it through the hollow part of the drill bit. In addition to the excellent cooling efficiency, the cost for cooling the drill bit is not required, and the workability is excellent without waiting for drying because water does not penetrate into the holes.

[0006]

Embodiments of the present invention will be described with reference to the drawings based on examples. Drill bit at peeling part 3 between skeleton concrete 1 and finishing material 2
When the tip 9 of 8 is applied and the air drill 7 is operated and rotated to pierce, the cooled air passing through the vortex tube 14 is sucked from the gap between the finishing material and the drill bit by the vacuum action of the air ejector pump 13 and is introduced into the hole. The introduced cooling air passes through the drill bit shaft hollow portion 10 from the drill bit tip suction port and is sucked out together with the shavings while cooling the drill bit tip 9, so that the shavings are interposed in the gap of the peeling portion 3. In addition, the powder does not pass through the peeling portion, and further, since no positive pressure is generated in the hole, the powder is not injected into the peeling portion and clogged.
Since the dust of the finishing material sucked by the air ejector pump 13 is separated and collected by the filter 15, dust generated at the time of drilling work does not occur.

[0007]

The present invention was conceived from a repair site of a building outer wall, and is intended to inject an adhesive into a peeling portion between a skeleton concrete and a finishing material, and to integrate these adhesives.
Various injection methods such as high-pressure injection method, low-pressure injection method, and vacuum injection method have been developed.However, any injection method is impeded by the grinding of the finishing material clogged in the hole of the injection port, and the adhesive is injected and filled into the peeling part It was rarely done. In spite of the fact that the adhesive injection work is most commonly used for repairing building exterior walls that are originally dangerous due to peeling, the clogging of the powder when drilling the injection port has not been solved. The injection method itself has not yet gained reliability. It is expected that the economy will prolong the life due to the economic downturn, and that as the number of older buildings increases, so will the cost of injecting cheap adhesives. According to the present invention: (1) Since suction is performed in a vacuum, no pressure in the hole that causes clogging of the powder in the gap between the peeled portions is generated. (2) Because of the vortex tube applied cooling method, water is not permeated by mist into the hole to impede the adhesive performance of the adhesive. Also, since no special gas or alcohol cylinder is used, the cost of cooling the drill bit is unnecessary. It is. (3) Since the cooling efficiency is higher than the heat of vaporization of the mist or alcohol, the durability of the expensive dia drill bit is improved, the drilling cost is reduced, and the work of exchanging the drill bit is omitted, thereby improving the workability. Due to such reasons, not only the reliability of the adhesive injection method can be restored, but also its widespread use is possible due to its economical efficiency. The wide spread of the present invention secures the safety performance of many buildings and contributes to public safety. .

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of a vacuum drilling drill.

FIG. 2 is a cross-sectional view showing an embodiment of a drill tip by a drilling method according to the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of a tip portion of a drill according to a conventional drilling method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Frame concrete 2 Finishing material such as mortar and tile 3 Finishing part of finishing material 4 Compressor 5 Air hose 6 Air distributor 7 Air drill 8 Drill bit 9 Drill bit tip 10 Drill bit hollow portion 11 Pad 12 Spring 13 Air ejector pump 14 Vortex tube 15 Dust collection filter

Claims (1)

[Claims] An air is compressed by a compressor (4).
Vortex is generated by injecting compressed air from the center of the V-shaped vortex tube 14 and rotating it at ultra-high speed. Ultra-low-temperature air is generated from the outlet of one of the tubes, and the low-temperature air is drilled by an air ejector pump 13 with a drill bit. A drill that cools the drill bit and collects dust by passing through the hollow part of the drill bit shaft 10 and sucking it from around the tip 9.