JPH069782Y2 - 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] A conventional water injection device will be described with reference to FIG. 4, taking Japanese Utility Model Publication No. 61-16008 as an example.

According to the prior art, there is a method in which water is directly introduced from the opening side while the diamond core bit 2 is kept in the upward state, and then the hydrous elastic body 11 having the tip to which the guide pin 9 and the pressing plate 10 are fixed is inserted. It is disclosed. But,
In this method, every time water is supplied into the diamond core bit 2, not only the troublesome work of always holding the rotary tool 1 or the diamond core bit 2 upward with one hand, but also the water-containing elastic body 11 is inserted. There was a problem that water sometimes splashed on the rotary tool 1. As a countermeasure, a waterproof cover 8 is attached to the tip of the rotary tool 1.
However, since the rotary tool 1 is expensive and the L dimension in FIG. 4 is large, it is impossible to make a hole in a narrow place.

If the concrete surface is uneven, the hydrous elastic body 1
In the diamond core bit 2, the sample No. 1 cannot rotate, cannot follow the rotational movement of the diamond core bit 2, and has a drawback that the surface is significantly damaged and the life is shortened.

[Purpose of device]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a device that is simple in operation and has a long life when pouring water of a punching device of this type.

[Outline of device]

According to the present invention, if a water tank is detachably installed in a drilling tool such as a diamond core bit, water supply work can be performed independently of a rotary tool, so that the water supply work is simplified and Focusing on the fact that if a part of the tank is made rotatable so that it can follow the rotational force of the diamond core bit without damaging the device even if the cutting surface is rough, It was devised.

[Example of device]

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

As shown in FIG. 1, the water injection device of the present invention includes a tank 3 for storing water, a hollow disc 4 rotatably arranged at an opening of the tank 3, and a detachable mounting of the hollow disc 4. And a sheet 7 and a sheet 6 fixed to the contact surfaces of the cylindrical member 5 and the hollow disk 4, respectively.

Each component will be described below.

The tank 3 is formed of a thin plastic material, has a bottomed cylindrical shape, and an outer peripheral portion thereof forms a bellows portion 3a that is expandable and contractable in the longitudinal direction. As shown in FIG. 2, the tip has an opening 3b having the same diameter as the inner diameter of the bellows, and a hollow disk 4 is rotatably mounted in the opening 3b. Since the diameter of the hollow disc 4 is larger than the inner diameter of the bellows 3a and smaller than the outer dimension thereof, the hollow disc 4 does not come off in the axial direction due to the step of the inner diameter of the bellows 3a.
Moreover, since the appropriate clearance A is provided between the outer circumference of the hollow disc 4 and the inside of the bellows portion 3a, the hollow disc 4 can smoothly rotate with respect to the bellows portion 3a.
On the surface of the hollow disc 4, a sheet 6 having substantially the same shape as that of the hollow disc 4 and in which numerous elastic fishing pieces are planted is integrally attached by an adhesive or the like. Further, the cylindrical member 5 has a communication hole 5a formed at the center thereof so as to be able to communicate with the hole 4a of the hollow disk 4, and has an end surface portion detachably coupled with the seat 6 and with respect to the rotational direction. A sheet 7 of a buff cloth, which is made of a non-woven fabric as a base material, is integrally attached with an adhesive or the like to give a locking force. The sheet 7 has an outer shape that is substantially the same as the outer shape of the sheet 6.

Next, the water injection device configured as described above will be described according to the drilling procedure.

First, as shown in FIG. 3, a state in which the tank 3 and the cylindrical member 5 are integrated (this state is hereinafter referred to as a tank assembly) is taken out from the inside of the diamond core bit 2. Since the tank assembly is simply inserted into the body of the diamond core bit 2, it can be easily taken out. Next, if a part of the cylindrical member 5 is grabbed and strongly raised against the tank 3, the innumerable elastic fishing pieces of the sheet 6 which are locked between the fiber filaments of the sheet 7 are temporarily extended slightly to form a circle. It can be removed from the plate 4. In this way, water is poured into the tank 3 from the round hole 4a of the hollow disc 4 separated from the cylindrical member 5 so that the tank 3 is almost filled, and the cylindrical member 5 is re-inserted.
The sheet 7 and the sheet 6 of the hollow disc 4 are attached to form a tank assembly. During this time, diamond core bit 2
Is very easy to work with because you only have to leave it in place. Finally, this tank assembly is loaded into the diamond core bit 2 to complete the water supply operation.

Regarding the water injection work, the bellows portion 3a shrinks as the drilling work progresses, the internal pressure increases, and the water in the tank 3 passes through the round hole 4a of the hollow disk 4 and is carried to the cylindrical member 5. The water carried to the cylindrical member 5 is carried to the tip through the communication hole 5a, is sent to the opening along the inner wall of the body of the diamond core bit 2 by the action of centrifugal force, and wets the cutting edge and the cutting surface. , Thereby providing cooling and lubrication.

Although it is perforated by the above process, if the concrete surface is uneven, the uneven surface and the cylindrical member 5
Between the cylindrical member 5 and the cylindrical member
Is in a non-rotatable state, but as described above, the hollow disk 4 arranged in the tank 3 freely rotates with respect to the rotation of the diamond core bit 2, and therefore is not damaged.
That is, the tank assembly including the tank 3 and the cylindrical member 5 is simply inserted into the diamond core bit 2, but the rotational force of the diamond core bit 2 is naturally transmitted to the tank 3 by the frictional force with the tank 3. Therefore, when the cylindrical member 5 becomes unrotatable due to the friction between the concrete surface and the cylindrical member 5, the tank 3 rotates, but the integrally connected hollow disc 4 and cylindrical member 5 are It will not rotate due to friction. As a result, no frictional load is applied to any member and no damage is caused.

INDUSTRIAL APPLICABILITY As described above, the present invention is a water injection device for a perforation tool that simplifies the water supply work and can always perform the perforation work in a stable state without damaging the device.

[Effect of device]

According to the present invention, since a water tank that can be expanded and contracted in the longitudinal direction and can easily perform water supply work can be arranged in the diamond core bit so that it can be freely inserted and removed, it is troublesome to support the main body each time water is supplied. This eliminates the need for a waterproof structure of the main body and allows the cylindrical member arranged at the tip of the water tank to be rotatable in the water tank via the hollow disk. Therefore, the life of the water injection device can be significantly improved without damaging the cylindrical member.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a water injection device for a perforating device according to the present invention, FIG. 2 is a side sectional view showing details of a tip portion of FIG. 1, and FIG. 3 is perforation of FIG. FIG. 4 is a side sectional view showing a state in which the tank assembly of the water injection device of the device is removed from the diamond core bit, and FIG. 4 is a side sectional view showing the water injection device of the prior art. 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 an opening part, 4 is a hollow disk, 4a is a round hole, 5 is a cylindrical member, 6 is a sheet, and 7 is a sheet. , 8 is a waterproof cover, 9 is a guide pin, 10 is a pressing plate, and 11 is a water-containing elastic body.

Claims (1)

[Scope of utility model registration request] 1. A drilling device having a substantially cylindrical bit which is attached to the tip of a rotary tool such as a drill for drilling work, and water is contained in the bit to inject water into the bit during drilling work. In a water injection device, a tank that contains the water and that can expand and contract in the longitudinal direction, a hollow disk that is arranged on the opening end side of the tank and that is rotatable with respect to the tank, and a hollow disk A water injection device for a drilling device, wherein a tank assembly comprising a detachably mounted cylindrical member is disposed in the body of the bit in a removable manner.