JPH0892Y2 - Water injection device for drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to a water injection device for a drilling device such as a diamond core bit.

[Background of the invention]

First, as a conventional technology for this type of water injection device,
Taking No. -123811 as an example, description will be given according to FIG.

According to this conventional technique, while holding the diamond core bit 2 which is a punching tool in an upward state, water is directly introduced from the opening side, and thereafter, the guide pin 7 and the pressing plate 8 are provided at the tip end of the hydrous elastic body. This is a method in which water is added to 4 and inserted. However, in this method, in order to supply water into the diamond core bit 2, the rotary tool 1 is always used with one hand.
Alternatively, there is a problem that not only the troublesome work of holding the diamond core bit 2 upward but also water is splashed on the rotary tool 1 unless water is carefully supplied. As a countermeasure for this, a waterproof cover 6 may be attached to the tip of the tool, but the addition of the waterproof cover 6 raises the problem that the price of the tool body increases.

In view of such a problem, conventionally, a water injection device having a structure as disclosed in, for example, Japanese Patent Laid-Open No. 1-316109 has been proposed. Such a water injection device is composed of a tank having an expandable and contractible bellows part and a water-containing elastic body rotatably attached to this tank via a smooth plate so that it can be installed inside a diamond core bit. It is provided. By using this water injection device, when water is supplied, the tank and the water-containing elastic body can be taken out from the diamond core bit, the water-containing elastic body can be removed from the smooth plate, and water can be supplied from the hole in the tank.
It is no longer necessary to keep the diamond core bit in the upward state as before, and it is possible to eliminate the drawback of water splashing on the rotary tool, and it has been possible to provide an extremely simple water supply device.

However, in the water injection device configured as in Japanese Patent Laid-Open No. 1-316109, the water contained in the tank is discharged from the outside of the tank through a hole provided in a portion where the water comes into contact with the hydrous elastic body from the side opposite to the rotating tool of the tank. Although it is carried to the tip of the diamond core bit by the action of centrifugal force, it is not possible to cool the entire diamond core bit. There was a problem that the cooling effect was low.

[Purpose of device]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a water injection device of this type, which is simple in water supply and has a high cooling effect.

[Outline of device]

The present invention is a simple water supply device for water supply that is installed in a drilling device and consists of a tank and a water-containing elastic body. Focusing on the fact that it can be done, the structure of the water supply device is devised.

[Example of device]

An embodiment according to the present invention will be described below with reference to FIGS.

The water injection device of the present embodiment is fixed to the water-containing elastic body 4 and the water-containing elastic body 4 which are arranged on the end face of the cutting edge side of the tank 3 for storing water and the diamond core bit 2 which is a drilling device for the tank 3. It is composed of a smooth plate 5. Each component will be described below. The tank 3 is made of a thin-walled plastic material, has a cylindrical shape with bottoms on both ends, and has a hole 3b on the end face located on the bottom side of the diamond core bit on both end faces, and the longitudinal outer periphery is long. It forms a bellows portion 3a that is expandable and contractible in the direction. Further, the water-containing elastic body 4 has a columnar shape, and has an end surface that is in contact with the tank 3,
That is, a smooth plate 5 made of a material which is not deformed by the compressive force during the punching work is attached to the end face opposite to the hole 3b with an adhesive or the like.

The water injection device configured as described above will be described according to the following drilling procedure.

First, the water-containing elastic body 4 and the tank 3 are taken out from the inside of the body of the diamond core bit 2. Fill the tank 3 with water from the hole 3b of the tank 3 so that it is almost full, and
Is loaded into the diamond core bit 2, and after loading the tank 3, the hydrous elastic body 4 is inserted. Although the water supply work is completed by the above, while the water is being supplied to the tank 3, the diamond core bit 2 and the rotary tool 1 need only be left at the drilling work site, which makes the work very easy, and the water can be directly supplied to the rotary tool. Since there is no pouring, there is little concern about splashing water. Next, regarding the water injection work during the drilling work, as shown in FIG. 2, the bellows portion 3a shrinks as the drilling work progresses,
When the internal pressure of the tank 3 becomes high, the water in the tank 3 is carried to the outside of the tank 3 through the hole 3b of the tank 3, and flows along the inner wall of the body of the diamond core bit 2 by the action of centrifugal force, so that the water content is increased. It is carried to the elastic body 4. Hydrous elastic 4
The water carried to further wets the cutting edge and cutting surface of the diamond core bit 2. With such a configuration, the cooling water cools the entire diamond core bit 2, and it is possible to provide a water injection device that is simple in water supply and has a high cooling effect.

[Effect of device]

According to the present invention, since the hole for draining water from the tank provided in the drilling device which can be easily expanded and contracted in the longitudinal direction is provided on the bottom side of the drilling device, it is possible to cool the entire drilling device. As a result, it is possible to provide a water injection device for a drilling device having a high cooling effect.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a water injection device for a perforating tool according to the present invention, FIG. 2 is a side sectional view showing a state during perforation according to the embodiment of FIG. 1, and FIG. It is a side sectional view showing the water injection device. In the figure, 1 is a rotary tool, 2 is a diamond core bit, 3 is a tank, 3a is a bellows part, 3b is a hole in the tank, 4 is a water-containing elastic body, 5 is a smooth plate, 6 is a waterproof cover, 7 is a guide pin, Reference numeral 8 is a pressing plate.

Claims (1)

[Scope of utility model registration request] 1. A substantially cylindrical drilling tool attached to the tip of a rotary tool, a tank provided inside the drilling tool and containing water therein, which is expandable and contractible in the longitudinal direction, and arranged at one end of the tank. A water injection device having the water-containing elastic body described above, wherein a hole for discharging water contained in the tank is provided on the bottom side of the perforation device of the tank.