KR20090111645A - A Catchtank of Suspensor Waterjet - Google Patents

Abstract

PURPOSE: A catch tank of a wet water-jet is provided to prevent water overflow from a tank and to discharge out an abrasive compound impossible to be recycled. CONSTITUTION: A catch tank of a wet water-jet comprises a supply tank, an injecting nozzle, a catch tank(4) and a stirring member. When the supply tank is filled with water and abrasive compound, a high pressure pump(2) presses the tank. The injecting nozzle injects the water of the high pressure pressurized by the high pressure pump at a high speed and cuts a work piece. The catch tank stores the water and abrasive compound after cutting. The stirring member has an open top with cylindrical form and prevents abrasive from being deposited on bottom of the tank.

Description

Catching tank for wet waterjets {A Catchtank of Suspensor Waterjet}

The present invention relates to a catch tank for wet waterjet, and has a stirring means inside the catch tank to prevent the used abrasive from being precipitated and hardened in the catch tank, thereby supplying an appropriate size of abrasive to the supply tank for reuse of the abrasive. It relates to a catch tank for a wet water jet that enables.

Waterjet injection cutting, a relatively late development of several metal and ceramic materials, is a new concept of cutting a workpiece using water.

The principle of water jet jetting is water erosion that is common in nature. In other words, this technology uses the phenomenon that the workpiece is eroded and cut by the impact of the high-speed waterjet striking the workpiece. Recently, almost all materials have been removed due to the addition of abrasives (abrasives) to enhance cutting ability. It is a situation that can be applied to the cutting and processing without post-processing.

The waterjet cutting device is basically divided into two parts, the high pressure generator and the nozzle device. The high pressure generator is a device that pressurizes water at a desired pressure. A pump that continuously presses water at a pressure of up to about 4000 atmospheres or more is used. The nozzle device has a function of converting high pressure water into a high speed waterjet. . The nozzle is usually made of cemented carbide, such as sapphire or diamond, and the nozzle hole diameter is usually less than 1mm.

However, the conventional waterjet cutting device as described above has various problems because there is no device that is mixed with water to recover and reuse the abrasive injected through the nozzle.

That is, in the process of cutting the workpiece using water and abrasive as described above, the tank is provided at the lower part of the fixing jig for fixing the workpiece to collect the water and the abrasive used therein. At this time, the abrasive having a greater density than water is precipitated to the bottom, and the abrasives stick to each other and harden over time. Therefore, conventionally, after using the waterjet cutting device for a predetermined time or more, there is a problem of removing the lump of abrasive particles hardened and precipitated at the bottom of the tank.

In addition, conventionally, since there is no device for recovering and reusing the used abrasive material, the used abrasive material must be disposed of, thus causing a disposal cost of the abrasive and there is a problem of environmental pollution due to the discarded abrasive material.

In addition, in order to continue to operate the waterjet cutting device due to the abrasive used once discarded, because the abrasive must be continuously supplied, there was a problem in that the operating cost increases.

The present invention has been made to solve the above problems, and an object of the present invention is to recover the abrasive used in cutting the workpiece, select only the abrasive of the appropriate size, and minimize the abrasive to be discarded by re-injection into the waterjet cutting device. It is to provide a catch tank for waterjet to reduce the operating cost.

The catch tank for waterjet of the present invention includes a supply tank into which water and an abrasive are introduced and pressurized by an external high pressure pump; An injection nozzle for cutting the workpiece by converting the high pressure water pressurized by the high pressure pump into a high speed water stream; And a catch tank spraying water from the spray nozzle and cutting the workpiece and storing the abrasive therein. In the catch tank for a wet water jet consisting of, the catch tank is characterized in that the inside of the hollow hollow cylindrical shape, the upper portion is opened, the inside is provided with a stirring means for preventing the precipitation of the abrasive.

The stirring means is characterized in that at least any one of a rotor, bubble generator or ultrasonic vibration means.

The bubble generator is characterized in that it is formed in a shape that decreases at a predetermined ratio on the inner wall forming the side of the catch tank.

The ultrasonic vibration means is characterized in that the frequency of the ultrasonic wave is within the range 28 ~ 40kHz.

The catch tank is further characterized in that the circulation pump for discharging the lower water and the abrasive to the upper portion of the catch tank through the circulation path.

The catch tank is characterized in that the maintenance door is formed to be opened and closed on the side.

The catch tank is characterized in that the water level sensor for sensing the water level is further provided on one side.

The catch tank is formed with an outlet for discharging the reusable abrasive and water in the lower portion, characterized in that the filter is further provided on the upper portion of the outlet.

The catch tank is characterized in that the discharge pipe for discharging the abrasive and water above a certain level on the upper one side is formed.

The discharge pipe is formed such that an inlet through which water and an abrasive flow into the upper side, and a filter is further provided below the inlet.

The catch tank is characterized in that the height adjustment means capable of adjusting the height and the moving means to enable the lower portion is formed.

The above-described configuration prevents the used abrasive from settling under the catch tank due to the operation of the rotor, bubble generator, ultrasonic wave excitation means and circulation pump provided inside the catch tank. There is a possible effect.

In addition, due to the discharge pipe formed on the upper part of the catch tank, water above a certain level is automatically discharged to prevent the water from overflowing to the upper part of the catch tank, and the filter provided at the inlet of the discharge pipe discharges the non-reusable abrasive to the outside. have.

In addition, the height adjustment means and the movement means is provided at the lower portion of the catch tank to freely move and fix the catch tank, and the maintenance door of the catch tank is provided on the side of the catch tank to open and close. There is an effect of facilitating.

Hereinafter, the catch tank for waterjet of the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a wet waterjet of the present invention, Figure 2 is a perspective view showing a catch tank of the present invention, Figure 3 is a cross-sectional view showing a catch tank of the present invention, Figure 4 is a bubble generating device of the present invention It is a cross section.

The catch tank for the wet waterjet of the present invention, as shown in Figures 1 to 3, the water and the abrasive is introduced into the supply tank (1) is pressurized by an external high-pressure pump (2); An injection nozzle (3) for cutting the workpiece by converting the high pressure water pressurized by the high pressure pump (2) into a high speed water stream; And a catch tank (4) which is sprayed from the spray nozzle (3) to cut the workpiece and the water and the abrasive are stored therein; In the catch tank for wet water jet consisting of, the catch tank (4) is characterized in that the inside is provided with a stirring means (10) for preventing the precipitation of the abrasive, the upper part is opened, the inside is opened. .

Since the water and the abrasive are mixed in the supply tank 1 and sprayed at a high speed through the injection nozzle 2 to the workpiece, the thickness which can be cut is increased and a smoother cutting surface can be obtained than the conventional waterjet spraying only water. . Generally used abrasives are aluminum oxide, garnet, copper slag (slag) and the specific gravity is greater than the water is cut into the catch tank with water after the end of the work is settled in the lower portion due to the greater specific gravity than water. The present invention relates to a catch tank configured to prevent the abrasive from settling as described above and to be reusable.

The catch tank 4 has a hollow cylindrical shape in which the workpiece is supported by a bed 5 provided between the spray nozzle 3 and the catch tank 4 so that the workpiece is cut by a water jet. The upper part is formed to be open so that the water and the abrasive sprayed in 3) flow into the catch tank 4 through the bed 5.

Inside the catch tank (4) is provided with a stirring means (10) to prevent the abrasive introduced with the water to settle to the bottom surface of the catch tank (4). The stirring means 10 is provided with at least one of the rotor 12, the bubble generator 14 or the ultrasonic wave excited means 16, in order to prevent the precipitation of the abrasive 12, the bubble generator ( 14) and the ultrasonic wave excitation means 16 are preferably provided.

The rotor 12 is provided with a motor 12a on the side of the catch tank 4 to rotate the rotor 12. Since the motor 12a is provided at the side of the catch tank 4, the rotor 12, which is axially coupled with the motor 12a, also rotates in the direction of gravity, so that water and abrasives inside the catch tank 4 are moved up and down. It is continuously rotated to prevent the precipitation of the abrasive.

The bubble generator 14 generates bubbles by air supplied by an external air supply means (not shown). The bubble generator 14 is provided on the bottom surface of the catch tank 4, as shown in Figure 4 and in the inner wall forming the side of the catch tank 4 so as to generate bubbles in the entire inner surface of the catch tank (4) It is preferable to form a rectangular shape that decreases at a predetermined ratio. Although the bubble generating device 14 is shown in a rectangular shape in the above, it is not limited to this shape and can be variously implemented according to the bottom shape of the catch tank 4, wherein the air supply means can be provided at a low cost. It is preferable to use an air compressor 14a.

Ultrasonic excitation means 16 is provided on the side of the catch tank 4. Ultrasonics have essentially the same properties as sound waves in the audible range, but generate very strong vibrations due to their high frequency and short wavelength. Therefore, the ultrasonic wave excitation means 16 continuously generates vibrations by the supply of electricity to prevent the abrasives from sticking to each other and solidifying. The frequency of the ultrasonic wave generated by the ultrasonic vibration means is preferably within the range of 28 to 40 kHz to minimize the vibration of the catch tank 4 itself due to the ultrasonic wave, and to prevent the abrasives from sticking together to increase the diameter of the abrasive. .

The catch tank 4 is further provided with a circulation pump 20 for continuously circulating the water and the abrasive inside. Due to the driving of the circulation pump 20, the water and the abrasive under the catch tank 4 are discharged to the upper portion of the catch tank 4 through the circulation path 22 to prevent the abrasive from settling.

The catch tank 4 has an outlet 50 for supplying reusable water and abrasives to the supply tank 1 by a supply pump 54 at a lower portion thereof. In addition, the water level sensor 40 is formed on the catch tank (4). The operation of the supply pump 54 may allow the supply pump 54 to operate according to the amount of water and abrasive discharged from the supply tank 1, and the catch tank 4 due to the continuous use of a waterjet. When there is a large amount of water and abrasives introduced into the water level sensor 40 detects this to increase the rotational speed of the supply pump 54 to increase the amount of water and abrasives discharged to the supply tank (1). You may also do so.

In addition, a filter 52 corresponding to the cross sectional area of the catch tank 4 is provided above the outlet 50 through which the water and the abrasive are discharged. Due to the filter 52, it is possible to filter out scraps of a predetermined size generated by cutting the workpiece by water and abrasive sprayed at high speed from the spray nozzle 3, thereby preventing damage to the equipment due to scrap. You can do it.

On the side of the catch tank 4 is a maintenance door 30 that can be opened and closed. When a problem occurs in each component inside the catch tank 40 due to the maintenance door 30, the maintenance door 30 can be easily opened and closed. In addition, the filter 52 has an effect of facilitating the removal of the filtered scrap.

A discharge pipe 60 is formed at one upper portion of the catch tank 4 to discharge water and abrasives introduced to a predetermined level or more to the outside to prevent the water and abrasives from overflowing to the upper portion of the catch tank 4. The discharge pipe 60 is formed such that an inlet 62 into which water and abrasives are introduced faces the upper portion of the catch tank 4, and a filter 64 is provided below the inlet 62. Due to the filter 64 is sprayed at high speed in the injection nozzle (3) in the process of cutting the workpiece is collided with the workpiece is smaller than a certain size has the effect that only non-reusable abrasive is discharged to the outside. In addition, since the filter 64 is formed below the inlet 62, the abrasive is accumulated on the filter 64 due to gravity, thereby preventing the discharge pipe 60 from clogging.

The catch tank 4 is usually provided at the lower part of the bed 5 on which the workpiece is placed and moves the catch tank 4 to the outside of the bed 5 for maintenance of the catch tank 4. Therefore, the height adjusting means 70 and the moving means 80 to enable the movement of the catch tank 4 is formed in the lower portion of the catch tank (4). The height adjusting means 70 is to adjust the height by using a hydraulic or pneumatic cylinder to position the catch tank 4 in the lower part of the bed (5) so that the movement means 80 and the ground is impossible to move The height of the catch tank 4 is increased above the spaced distance so that the catch tank 4 is fixed to the bottom of the bed 5. The moving means 80 uses a general wheel, and when moving the catch tank 4 to the outside of the bed (5) for the maintenance of the catch tank (4) to the height of the height adjusting means (70) The moving means 80 is reduced below the height in contact with the ground to allow the moving means 80 to push or pull.

The operation of the catch tank of the present invention will be described with reference to FIG. The water and the abrasive mixed in the supply tank 1 are discharged from the supply tank 1 at high pressure by the operation of the high pressure pump 2, and then moved to the injection nozzle 3, and then in the injection nozzle 3 Water and abrasive sprayed at high speed hit the workpiece, cut the workpiece by the impact, and enter the catch tank (4). Incoming water and abrasives include scrap of the cut workpiece and some of the abrasives are smaller in diameter due to impacts on the workpiece. The catch tank 4 is bubbled through the bubble generator 14 provided at the bottom, the water and the abrasive continuously up and down inside the catch tank 4 in accordance with the rotation of the rotor 12 of the side Stirring to prevent precipitation of the abrasive. In addition, since the abrasives are prevented from sticking to each other due to the operation of the ultrasonic wave excitation means 16, there is an effect of minimizing the amount of the abrasives discarded due to the volume increase of the abrasives. In addition, due to the operation of the circulation pump 20 by discharging the lower water and the abrasive to the upper portion of the catch tank through the circulation path 22 to improve the stirring efficiency of the water and the abrasive. The continuous use of the wet water jet reduces the amount of water and abrasive in the supply tank 1, so that the water and abrasive having been scraped off by the lower filter 52 for the continuous use are supplied to the feed pump 54. It is discharged by the supply to the supply tank (1). In order to reuse the abrasive discharged from the catch tank 4, a separate filter means (not shown) is provided to allow the abrasive and water to pass through, so that only the abrasive of the appropriate size is supplied to the supply tank 1 to cut the workpiece. It is also good to let this increase. When the water level is increased due to the inflow amount of the water and the abrasive cut through the workpiece than the amount of the water and the abrasive discharged through the supply pump 54, the water level sensor 40 detects this to increase the speed of the supply pump 54 On the other hand, the abrasive less than a certain size is discharged together with water through the discharge pipe 60 on one side of the catch tank (4).

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

1 is a schematic representation of a wet waterjet of the present invention.

Figure 2 is a perspective view of the catch tank of the present invention.

3 is a cross-sectional view showing a catch tank of the present invention.

4 is a cross-sectional view showing a bubble generating device of the present invention.

** Description of the symbols for the main parts of the drawings **

1: supply tank 2: high pressure pump

3: injection nozzle 4: catch tank

5: bed

10: stirring means 12: rotor

14: bubble generator 16: ultrasonic wave excitation means

20: internal circulation pump 22: circulation path

30: Maintenance door 40: Water level sensor

50: outlet 52: supply pump

54: filter

60: outlet 64: filter

70: height adjusting means 80: moving means

Claims (11)

Water and abrasives are introduced into the supply tank (1) is pressurized by an external high pressure pump (2); An injection nozzle (3) for cutting the workpiece by converting the high pressure water pressurized by the high pressure pump (2) into a high speed water stream; And A catch tank 4 spraying water from the spray nozzle 3 and cutting the workpiece and storing the abrasive therein; In the catch tank for wet waterjet, The catch tank (4) is a catch tank for a wet water jet, characterized in that the inside is hollow, the upper portion is open, the inside is provided with a stirring means for preventing the precipitation of the abrasive. The method of claim 1, The stirring means (10) is a catch tank for a wet water jet, characterized in that at least one or more of the rotor (12), bubble generator (14) or ultrasonic excitation means (16). The method of claim 2, The bubble generating device 14 is a catch tank for a wet water jet, characterized in that formed in a shape that is reduced in a predetermined ratio on the inner wall forming the side of the catch tank (4). The method of claim 2, The ultrasonic excitation means 16 is a catch tank for a wet water jet, characterized in that the frequency of the ultrasonic wave within the range of 28 ~ 40kHz. The method according to claim 3 or 4, The catch tank (4) is a wet water jet catch tank, characterized in that further provided with a circulation pump 20 for discharging the lower water and the abrasive to the upper portion of the catch tank (4) through the circulation passage (22). The method of claim 5, wherein The catch tank (4) is a catch tank for a wet water jet, characterized in that the maintenance door 30 is formed on the side. The method of claim 6, The catch tank (4) is a catch tank for a wet water jet, characterized in that the water level sensor 40 for sensing the water level on one side further. The method of claim 7, wherein The catch tank (4) is a catch tank for a wet water jet, characterized in that the outlet (50) for discharging the reusable abrasive and water is formed at the bottom, the filter 52 is further provided on the outlet. The method of claim 8, The catch tank (4) is a wet water jet catch tank, characterized in that the discharge pipe (60) for discharging the abrasive and water above a certain level on one side of the upper portion is formed. The method of claim 9, The discharge pipe (60) is formed so that the inlet (62) into which the water and the abrasive flows upwards, the catch tank for a wet water jet, characterized in that the filter 64 is further provided below the inlet (62). The method of claim 10, The catch tank (4) is a catch tank for a wet water jet, characterized in that the height adjustment means 70 is adjustable in the lower portion and the movement means for enabling movement (80) is formed.

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