KR100982567B1 - Apparatus of jet on/off for wet type water-jet and method of the same - Google Patents

Abstract

PURPOSE: An opening and closing apparatus for jetting of a wet-type water jet is provided to prevent damage to a nozzle and a valve by the control of a nozzle and a valve. CONSTITUTION: An opening and closing apparatus for jetting of a wet-type water jet comprises an injection valve, a bypass line(20), and a bypass valve(V5). The injection valve is installed in a slurry supply unit(60). The injection valve opens and seals the flow path of a slurry supply unit. One end of the bypass line is connected to a high pressure water supply unit(30) and the other end of bypass line is connected to the front end of the injection valve of the slurry supply unit. The bypass line supplies the high pressure water to the slurry supply unit.

Description

Apparatus of Jet On / Off for Wet type Water-Jet and Method of the same}

The present invention relates to a wet water jet, and more particularly, to control the injection opening and closing of the wet water jet directly to the valve, the spray opening and closing device and method of the wet water jet to minimize the damage to the valve and nozzle by operating in the state of removing the abrasive It is about.

Waterjet cutting technology is a processing technology for cutting a workpiece by spraying water at high pressure.

The principle of water jet cutting technology 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 hitting the workpiece. Recently, almost all materials are cut due to the waterjet added with abrasives to enhance the cutting ability. And it is a situation that can be applied without post-processing in processing.

The waterjet cutting machine is basically divided into two parts, the high pressure generator and the spray nozzle. The high pressure generator is a device that pressurizes water at a desired pressure, and a pump for continuously pressurizing water at a pressure up to 4000 bar or more is used. The spray nozzle has a function of converting high pressure water into a high speed waterjet. Injection nozzles are usually made of cemented carbide materials such as sapphire or diamond, and the hole diameters of injection nozzles are usually less than 1mm.

Most waterjet cutting devices are mainly sprayed with abrasives mixed with waterjet streams.

On the other hand, in the case of a wet water jet in which an abrasive is mixed with water and sprayed in advance, a supply tank 1 filled with water and an abrasive is provided as shown in FIG. 1, and an abrasive supply unit for supplying abrasive to the supply tank 1. (2), a high pressure water supply line (3) for supplying high pressure water to the supply tank (1), the high pressure water and abrasives provided in the supply tank (1) are mixed and the mixed slurry and the nozzle portion It may be composed of a mixing line 5 for discharging to the (4) and the injection line (6) connecting the supply tank (1) and the nozzle unit.

The high pressure water supply line (3) is a first high pressure water supply line (3a) for supplying high pressure water to the mixing line (5), and supply the high pressure water into the supply tank (1) to the supply tank ( 1) is divided into a second high pressure water supply line (3b) for pressurizing the abrasive to eject the abrasive, the high pressure water for controlling the opening and closing of the first high pressure water supply line (3a) on the first high pressure water supply line (3a) A valve v1 may be provided, and an abrasive valve v3 may be provided on the second high pressure water supply line 3b to control opening and closing of the second high pressure water supply line 3b.

The spray line 6 is connected to the mall mixing line 5 to supply a slurry supply line 6a for supplying the slurry to the nozzle unit 4, one end of which is connected to the supply tank 1, and the other end of the slurry supply line ( A dilution line 6b for diluting the abrasive of the slurry connected to 6a) and flowing into the slurry supply line 6a, and on the dilution line 6b, a dilution controlling the opening and closing of the dilution line 6b. The valve v2 is provided.

The operation process of the conventional wet water jet according to the above configuration is as follows.

Opening the high pressure water valve v1 to supply high pressure water to the mixing line 5;

Opening the dilution valve v2 to dilute the abrasive contained in the pipe;

Opening the abrasive valve v3 and closing the dilution valve v2 to supply abrasive to the mixing line 5;

Through the slurry to the nozzle,

Opening the dilution valve v2 and closing the abrasive valve v3 to suppress the supply of abrasives;

Supplying the internal pressure of the supply tank 1, and closing the high pressure water valve v1 to suppress supply of high pressure water;

Through the nozzle will be terminated.

The wet water jet of the above-described configuration is not a problem for the process in which the processing is continuously performed because the process is complicated and the pressure of the supply tank 1 must be reduced in order to finish the nozzle spraying. If you try to process elsewhere, the process speed is slow, because the nozzle is moved in the state that the slurry is injected because the nozzle is not completely sealed, there is a problem that the workpiece is damaged due to the spraying of the slurry in the section where the nozzle is moved. .

In order to solve this problem, a method of directly controlling the slurry supplied to the nozzle unit 4 by adding a valve (not shown) to the slurry supply line 6 may be considered. (6) there is an additional problem that the valve (not shown) that is installed to open and close is easily damaged to develop a technology that can open and close the slurry supply line (6) without damaging the valve.

The present invention has been made to solve the above problems, an object of the present invention is to remove the abrasive flowing in the valve and nozzle using pure high pressure water and then operate the valve to spray through the nozzle without damaging the valve or nozzle It is to provide a spray opening and closing device and method of a wet water jet to be able to directly control the slurry to be.

The jet opening and closing device of the wet waterjet of the present invention includes a supply tank 10 filled with water and abrasives; An abrasive supply unit 11 for supplying an abrasive to the supply tank 10; A high pressure water supply unit 30 supplying high pressure water to the supply tank 10; A mixing unit 50 provided inside the supply tank 10 and discharging the slurry, the one end of which is connected to the high pressure water supply unit 30 and mixed with the supplied high pressure water and the abrasive, to the other end; A slurry supply part 60 having one end connected to the mixing part 50 and receiving a slurry and supplying the slurry to the other end; And a nozzle unit 40 connected to the other end of the slurry supply unit 60 to convert the slurry into a high speed water stream to cut the workpiece. A wet water jet comprising: an injection valve (V6) provided on the slurry supply unit 60 for opening or closing a flow path of the slurry supply unit 60; One end is connected to the high pressure water supply unit 30, the other end is connected to the front end of the injection valve (V6) on the slurry supply unit 60, the bypass line 20 for supplying the high pressure water to the slurry supply unit 60 ; And a bypass valve (V5) provided on the bypass line (20) to open or close the flow path of the bypass line (20). Characterized in that comprises a.

In addition, the high pressure water supply unit 30 includes a first supply line 31 for supplying the high pressure water to the mixing unit 50; And a second supply line 32 for supplying high pressure water into the supply tank 10 to pressurize the supply tank 10. And a high pressure water valve (V1) for opening or closing a flow path of the first supply line (31) on the first supply line (31), and on the second supply line (32). It is characterized in that the abrasive valve (V3) for opening or closing the flow path of the second supply line (32) is provided.

In addition, the slurry supply unit 60 is one end is connected to the other end of the mixing unit 50, the other end is connected to the nozzle unit 40 for supplying a slurry to the nozzle unit (40); And a dilution line 62 to which one end is connected to the supply tank 10 and the other end is connected on the injection line 61 to receive the high pressure water and dilute the abrasive of the slurry flowing in the injection line 61. ; It is made, including, the dilution line 62 is characterized in that it is provided with a dilution valve (V2) for opening or closing the flow path of the dilution line (62).

In addition, the injection opening and closing device, the pressure reducing line 70 is formed so that one end is connected to the supply tank 10 and the other end is exposed to the outside; It is made, including, and on the pressure reducing line 70 is characterized in that the pressure reducing valve (V4) for opening or closing the flow path of the pressure reducing line (70) is provided.

The spray opening and closing method of the wet waterjet of the present invention includes a first step (S10) in which the slurry is injected through the nozzle unit 40; A second step (S20) of closing the high pressure water valve (V1) and the abrasive valve (V3) to suppress the injection of the slurry; A third step S30 of opening the bypass valve V5 to introduce high-pressure water into the injection line 61; A fourth step (S40) of removing the abrasive in the slurry remaining in the spray line 61 by the high pressure water; And a fifth step S50 of closing the injection valve V6. Through the abrasive is completely removed, characterized in that to block the injection of the slurry.

In addition, the sixth step (S60) for opening the injection valve (V6); A seventh step (S70) of closing the bypass valve (V5) to cut off the high pressure water supplied to the injection line (61); An eighth step S80 of opening the high pressure water valve V1 and the dilution valve V2 to supply the high pressure water to the mixing unit 50; And a ninth step (S90) of opening the abrasive valve (V3) and closing the dilution valve (V2) to supply the abrasive to the mixing unit (50). It is characterized in that to resume the injection of the slurry through.

The apparatus for opening and closing the water jet of the wet water jet of the present invention having the configuration described above has an effect that the valve and the nozzle are not damaged because the injection of the valve and the nozzle is controlled while the abrasive is not flowed.

In addition, the slurry is sprayed directly through the valve to control the work process is faster, there is an effect that the workpiece is precisely processed.

1 is a schematic view of a conventional wet waterjet
Figure 2 is a schematic view of the wet water jet spray opening and closing apparatus of the present invention
Figure 3 is a schematic view of the abrasive injection pipe of the present invention
4 is a flow chart of a method of blocking injection of a wet water jet slurry of the present invention.
5 is a method flow diagram for resuming spraying a wet waterjet slurry of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

2, the wet water jet spray opening and closing apparatus of the present invention is a supply tank 10, abrasive supply unit 11, bypass line 20, high pressure water supply unit 30, nozzle unit 40, mixing unit ( 50), the slurry supply unit 60 and the pressure reduction line 70 may be made.

The supply tank 10 may be used a configuration of a conventional wet waterjet. The supply tank 10 may be filled with water and abrasives. More specifically, the water is present in the upper side, the lower side may be filled in the form of a mixture with the abrasive. The abrasive supply unit 11 is connected to the supply tank 10 to supply the abrasive to the supply tank (10).

The high pressure water supply unit 30 is connected to the configuration that one end can be supplied with water, such as a water tank and running water, and serves to supply the high pressure water to the other end through a pressurizing means. The other end of the high pressure water supply unit 30 may be connected to the supply tank 10.

The high pressure water supply unit 30 may be composed of a first supply line 31 and a second supply line 32. The other end of the first supply line 31 may be connected to one end of the mixing unit 50 to supply the high pressure water to the mixing unit 50. The second supply line 32 may be connected to the supply tank 10 at the other end to pressurize the supply tank 1 by supplying the high pressure water into the supply tank 10. On the first supply line 31 is provided a high-pressure water valve (V1) for controlling the opening and closing of the first supply line 31, the second supply line 32 of the second supply line (32) An abrasive valve V3 for controlling the opening and closing may be provided.

The high pressure water valve V1 may be formed to open or close the flow path of the first supply line 31. The high pressure water supplied to the mixing unit 50 may be opened or blocked through the high pressure water valve V1.

The abrasive valve V3 may be formed to open or close the flow path of the second supply line 32. Opening or blocking the high pressure water supplied to the supply tank 10 through the abrasive valve V3 to induce the injection of the abrasive into the mixing unit 50 to be described later, or of the abrasive injected into the mixing unit 50 May lead to blockage.

The mixing unit 50 may be provided inside the supply tank 10. One end of the mixing part 50 may be connected to the other end of the first supply line 31, and the other end may be connected to one end of the slurry supply part 60. Hereinafter, the mixing unit 50 will be described in detail by dividing the high pressure water line 51 and the abrasive mixing line 52 which are components of the mixing unit 50.

One end of the high pressure water line 51 may be connected to the first supply line 31, and the other end may be connected to one end of the abrasive mixture line 52. The high pressure water line 51 serves to supply the high pressure water supplied from the first supply line 31 to the abrasive mixture line 52 in the supply tank 10. One end of the abrasive mixture line 52 may be connected to the high pressure water line 51, and the other end thereof may be connected to one end of the slurry supply unit 60. The abrasive mixing line 52 serves to mix the abrasive with the high pressure water supplied from the high pressure water line 51 and supply the slurry to the slurry supply unit 60, which will be described in detail below.

The high pressure water line 51 and the abrasive mixture line 52 may be connected through an abrasive injection pipe 53. The abrasive injection pipe 53 may be formed to connect three pipes with a conventional connecting pipe. The abrasive injection pipe 53 may be made of a 'T' shape. The abrasive injection pipe 53 may include a first inlet 53a, a second inlet 53b, and an outlet 53c. The first inlet 53a may be connected to the high pressure water line 51, the second inlet 53b may be formed to be exposed to the abrasive, and the outlet 53c may be connected to the abrasive mixture line 52. have.

Due to the configuration of the abrasive injection pipe 53 from the second inlet 53b by the pressure of the supply tank 10 and the pressure of the high pressure water flowing from the first inlet 53a to the outlet 53c The abrasive will flow in.

Through the above process, the slurry in which the abrasive and the high pressure water are mixed is supplied to the slurry supply unit 60.

One end of the slurry supply part 60 is connected to the other end of the mixing part 50, and the other end is connected to the nozzle part 40 to be supplied through the high pressure water line 51 and the abrasive mixing line 52. It serves to supply the slurry to the nozzle unit 40.

The nozzle unit 40 is configured to inject the high pressure slurry supplied from the slurry supply unit 60 at high speed, thereby cutting the workpiece through the high pressure high speed slurry injected from the nozzle unit 40.

The slurry supply unit 60 is composed of a spray line 61 and a dilution line 62. One end of the spray line 61 is connected to the other end of the abrasive mixing line 52 of the mixing unit 50, and the other end is connected to the nozzle unit 40 to supply a slurry supplied from the abrasive mixing line 52. It serves to supply to the nozzle unit 40. One end of the dilution line 62 may be connected to the supply tank 10, and the other end thereof may be connected to the injection line 61. The dilution line 62 serves to dilute the abrasive contained in the high pressure water when the high pressure water is supplied from the supply tank 10 and flows through the injection line 61. On the dilution line 62 is provided with a dilution valve (V2) for controlling the opening and closing of the dilution line (62).

The injection valve V6 may be provided on the injection line 61. More specifically, the dilution line 62 may be provided at the rear end connected thereto. The injection valve V6 may be formed to open or close the flow path of the injection line 61. The slurry supplied to the nozzle unit 40 through the injection valve V6 may be directly opened or blocked. When the slurry injection is directly controlled through the injection valve (V6), the operation process is faster because the slurry is moved by blocking the slurry injection when working from one place to another, and the workpiece is not sprayed on the movement path of the nozzle and thus the workpiece It does not damage the effect.

At this time, the present invention is said to be a key component of the present invention to protect the injection valve (V6) that may be damaged during the sealing operation of the injection valve (V6) due to the abrasive contained in the slurry flowing through the slurry supply unit 60. Bypass line 20 and the bypass valve (V5) may be provided.

The bypass line 20 may be formed such that one end is connected to the high pressure water supply unit 30 and the other end is connected to the injection line 61. More specifically, one end is connected to the high pressure water supply unit 30, and is connected to the front end of the high pressure water valve (V1) and the abrasive valve (V3), the other end is connected to the injection line 61, It may be connected to the front end of the injection valve (V6). The bypass line 20 receives high pressure water from the high pressure water supply unit 30 and supplies the high pressure water to the injection line 61 to dilute and remove the abrasive contained in the slurry flowing into the injection line 61. Do this. This is to prevent damage to the injection valve V6 caused by the abrasive by sealing the injection valve (V6) in a state in which the flow of the abrasive is minimized to the injection valve (V6) that is normally open.

The bypass valve V5 may be provided on the bypass line 20. The bypass valve V5 may be formed to open or close the flow path of the bypass line 20. The high pressure water supplied to the injection line 61 may be opened or blocked through the bypass valve V5. This is to inject high-pressure water only when it is necessary to seal the injection valve (V6) in a state in which the inflow of high-pressure water to the injection line (61) normally.

The decompression line 70 may be formed such that one end is connected to the supply tank 10 and the other end is exposed to the outside. A pressure reducing valve V4 may be provided on the pressure reducing line 70. The pressure reducing valve V4 serves to reduce or maintain the pressure of the supply tank 10 by opening or blocking the high pressure water supplied from the supply tank 10 to the pressure reducing line 70. This is to depressurize the supply tank 10 when it is normally closed and the flow path is blocked and needs repair or forced termination.

Hereinafter, a spray opening and closing method of the wet water jet of the present invention configured as described above will be described with reference to the drawings.

3 and 4, the present invention directly controls the slurry injected through the nozzle unit 40 without damaging the injection valve V6 through the following steps.

In order to block the slurry injected through the nozzle unit 40, the following steps are performed.

In the state where the first step (S10) in which the slurry is injected through the nozzle unit 40 is performed

A second step S20 of closing the high pressure water valve V1 and the abrasive valve V3 is performed. When the high pressure water valve V1 is closed, the high pressure water supplied to the high pressure water line 51 is cut off, and the supply of the slurry to the injection line 61 is stopped. When the abrasive valve V3 is closed, the supply of abrasive to the abrasive mixing line 52 is stopped.

Next, a third step S30 of opening the bypass valve V5 is performed. When the bypass valve V5 is opened, the high pressure water is supplied to the injection line 61 through the high pressure water supply unit 30.

Next, a fourth step (S40) in which the abrasive contained in the slurry existing by the high pressure water supplied to the spray line 61 is diluted and discharged through the nozzle unit 40 to remove the abrasive in the spray line 61. ). Through the fourth step (S40) to dilute the slurry remaining in the injection line 61 and finally only pure water remains.

Next, the injection valve V6 is closed to block the slurry injected into the nozzle while the abrasive is removed. In other words, when the abrasive is not present on the injection valve V6, the injection valve V6 is closed to seal the flow path of the injection line 61, and the injection of the slurry is blocked.

Through the above process, the slurry injected through the nozzle unit 40 is blocked without damaging the injection valve V6.

In order to resume spraying the slurry through the nozzle unit 40, the following steps are performed.

The sixth step S60 of opening the injection valve V6 to open the flow path of the injection line 61 is performed.

Next, a seventh step S70 of closing the bypass valve V5 to seal the flow path of the bypass line 20 is performed. The bypass line 20 is closed to block the high pressure water supplied to the injection line 61.

At the same time, open the high pressure water valve (V1) and the dilution valve (V2) to the eighth step (S80) so that only high pressure water can be injected through the injection line 61 without the abrasive flowing into the abrasive mixture line 52 To perform.

Next, the abrasive valve V3 is opened, and the dilution valve V2 is closed to perform the ninth step S90 in which the abrasive is supplied to the abrasive mixture line 52. The high pressure water and the abrasive are introduced into the mixing part 50 through the eighth and ninth steps S90 and are discharged to the spray line 61.

The slurry supplied to the spray line 61 through the above process is restarted through the nozzle unit 40.

The technical spirit should not be interpreted as being limited to the above embodiments of the present invention. Various modifications may be made at the level of those skilled in the art without departing from the spirit of the invention as claimed in the claims. Therefore, such improvements and modifications fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

10: supply tank 11: abrasive supply unit
20: bypass line
30: high pressure water supply unit 31: the first supply line
32: second supply line
40: nozzle unit
50: mixing section 51: high pressure water line
52: abrasive mixture line 53: abrasive injection pipe
60: slurry supply unit 61: injection line
62: dilution line
70: decompression line
V1: High Pressure Water Valve V2: Dilution Valve
V3: Abrasive Valve V4: Pressure Reducing Valve
V5: Bypass Valve V6: Injection Valve

Claims (6)

Supply tank 10 is filled with water and abrasives;
An abrasive supply unit 11 for supplying an abrasive to the supply tank 10;
A high pressure water supply unit 30 supplying high pressure water to the supply tank 10;
A mixing unit 50 provided inside the supply tank 10 and discharging the slurry, the one end of which is connected to the high pressure water supply unit 30 and mixed with the supplied high pressure water and the abrasive, to the other end;
A slurry supply part 60 having one end connected to the mixing part 50 and receiving a slurry and supplying the slurry to the other end; And
A nozzle unit 40 connected to the other end of the slurry supply unit 60 to cut the workpiece by converting the slurry into a high speed water stream;
In the wet waterjet comprising:
An injection valve (V6) provided on the slurry supply unit (60) for opening or closing a flow path of the slurry supply unit (60);
One end is connected to the high pressure water supply unit 30, the other end is connected to the front end of the injection valve (V6) on the slurry supply unit 60, the bypass line 20 for supplying the high pressure water to the slurry supply unit 60 ; And
A bypass valve (V5) provided on the bypass line (20) for opening or closing a flow path of the bypass line (20);
Including but not limited to,
The slurry supply unit 60,
An injection line 61 having one end connected to the other end of the mixing part 50 and the other end connected to the nozzle part 40 to supply slurry to the nozzle part 40; And
A dilution line 62 having one end connected to the supply tank 10 and the other end connected to the injection line 61 to receive high pressure water and dilute the abrasive of the slurry flowing into the injection line 61; It is made, including
The dilution line (62) is a spray water opening and closing device of the water jet, characterized in that a dilution valve (V2) for opening or closing the flow path of the dilution line (62) is provided.
The method of claim 1,
The high pressure water supply unit 30,
A first supply line 31 supplying the high pressure water to the mixing part 50; And
A second supply line 32 for supplying high pressure water into the supply tank 10 to pressurize the supply tank 10; It is made, including
On the first supply line 31 is provided a high-pressure water valve (V1) for opening or closing the flow path of the first supply line 31, the second supply line 32 on the second supply line (32) And an abrasive valve (V3) for opening or closing an oil passage.
delete 3. The method according to claim 1 or 2,
The spray opening and closing device of the wet water jet,
A pressure reducing line (70) having one end connected to the supply tank (10) and the other end formed to be exposed to the outside; It is made, including
On the decompression line (70), a water jet injection opening and closing device, characterized in that a pressure reducing valve (V4) for opening or closing the flow path of the decompression line (70) is provided.
In the spray opening and closing method of a wet waterjet,
First step (S10) that the slurry is injected through the nozzle unit 40;
A second step (S20) of closing the high pressure water valve (V1) and the abrasive valve (V3) to suppress the injection of the slurry;
A third step S30 of opening the bypass valve V5 to introduce high-pressure water into the injection line 61;
A fourth step (S40) of removing the abrasive in the slurry remaining in the spray line 61 by the high pressure water; And
A fifth step S50 of closing the injection valve V6;
Method for spray opening and closing of a wet water jet, characterized in that the injection of the slurry after the abrasive is completely removed through.
6. The method of claim 5,
A sixth step (S60) of opening the injection valve (V6);
A seventh step (S70) of closing the bypass valve (V5) to cut off the high pressure water supplied to the injection line (61);
An eighth step S80 of opening the high pressure water valve V1 and the dilution valve V2 to supply the high pressure water to the mixing unit 50; And
A ninth step (S90) of opening the abrasive valve (V3) and closing the dilution valve (V2) to supply the abrasive to the mixing unit (50);
Spray opening and closing method of the wet waterjet, characterized in that to resume the injection of the slurry through.

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