KR102318945B1 - Valve system for automatic gas cutting machine - Google Patents

Abstract

A valve system for an automatic gas cutting machine is disclosed. The valve system for an automatic gas cutting machine of the present invention comprises: a valve body having an inlet formed at a lower portion of a pipe body, and a junction pipe protruding from the circumference of a side surface of the pipe body; and a torch connected to the valve body through the junction pipe and including a first outlet and a second outlet so that gases supplied to the inside of the pipe body can be separately discharged. Oxygen and a gas supplied from an oxygen tank and a gas tank are discharged through the first outlet. After part of the oxygen in the oxygen tank is independently supplied to the valve body and a fluid motor which is used as a power source of the gas cutting machine, respectively, the part of the oxygen joins in the junction pipe, and then is discharged through the second outlet. The valve body includes a pressure control unit for controlling the pressure of oxygen supplied from the oxygen tank to supply the oxygen to the second outlet.

Description

Valve system for automatic gas cutting machine {VALVE SYSTEM FOR AUTOMATIC GAS CUTTING MACHINE}

The present invention relates to a valve system for an automatic gas cutter, and more particularly, to a valve system for an automatic gas cutter capable of supplying gas by dispersing it to a torch and a fluid motor of the automatic gas cutter.

In general, in order to cut an object formed of iron, a welding device that generates a flame with oxygen and gas is used for cutting. Such a gas cutter has a problem in that it cannot be cut to a certain width as an operator uses it directly to cut an object.

In order to solve this problem, a gas cutter is being developed in Korean Patent Registration No. 10-0384639.

This conventional gas cutting machine is composed of a main body having a first rotating motor, a rotating unit having a second rotating motor, a radius adjusting unit, and a vertical and tilt adjusting unit having a torch. The position can be moved so that the object can be cut precisely.

However, this gas cutter requires power to operate the first and second rotary motors, and there is a problem in that it cannot be used in places where power is not supplied.

Accordingly, an automatic gas cutting machine driven by gas pressure has been developed, which is disclosed in Korean Patent Registration No. 10-0267018.

This conventional automatic gas cutting machine is composed of a case and a driving wheel provided to be rotatable in the case, a torch for discharging a cutting flame, and a gas supply unit for supplying cutting gas to the torch.

Here, a space portion having a flow path through which some of the gas supplied from the gas supply unit is supplied and discharged is formed inside the case, and a piston and a rotation provided to be rotatable in this space portion are installed.

In addition, a handle for gripping the case and an operation lever for supplying the gas of the gas supply unit to the torch and the flow path are provided on the handle.

The piston and the rotation are rotated by the gas supplied to the flow path by operating the operation lever, and this rotational force is transmitted to the driving wheel and automatically moved while cutting the object to be cut.

However, in the conventional automatic gas cutting machine, it is easy to cut a pipe or an iron plate having a relatively thin thickness by the mixed gas of oxygen and gas supplied to the torch. There is a structural problem that requires a long cutting time.

KR Registered Patent Publication No. 10-0384639 KR Registered Patent Publication No. 10-0267018 KR Registered Patent Publication No. 10-2156810

It is an object of the present invention to provide a valve system for an automatic gas cutter capable of increasing the pressure of the gas supplied to the torch and the fluid motor during supply by dispersing the gas to the torch and the fluid motor of the automatic gas cutter.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. There will be.

The technical problem is, the inlet is formed in the lower portion of the tubular body, the valve body is provided so that the confluence pipe is formed to protrude around the side surface of the tubular body; and a torch connected to the valve body and the merging pipe and provided with a first outlet and a second outlet, respectively, so that the gas supplied to the inside of the pipe can be separately discharged. Oxygen and gas supplied from the gas tank are discharged to the first outlet, and a portion of oxygen in the oxygen tank is independently supplied to the valve body and the fluid motor used as a power source of the gas cutting device, and then to the merging pipe. and is discharged to the second outlet, and the valve body includes a pressure adjusting unit provided to control the pressure of oxygen supplied from the oxygen tank to supply it to the second outlet.

The pressure control unit may include: a lifting operation shaft that is installed so as to be able to move up and down inside the valve body and has an opening/closing stopper formed at the lower end to block the inlet; a piston installed in the middle of the lifting shaft; With respect to the piston, an elastic part consisting of a first spring installed on the lifting operation shaft to be disposed above the piston, and a second spring installed on the lifting operation shaft to be disposed between the piston and the stopper; and an operation lever that is rotatably connected to the upper end of the lifting operation shaft exposed to the upper portion of the valve body through a hinge shaft, and a guide hole for guiding the lifting operation shaft in the vertical direction at the connection portion of the hinge shaft; Including, wherein the operation lever is rotated so as to be arranged in line with the valve body so that the hinge shaft can be guided up and down along the guide hole, so that the oxygen supplied from the oxygen tank is contracted by a relatively weak force of the elastic part oxygen supplied from the oxygen tank by opening the stopper, supplying it to the first outlet through the confluence pipe, and fixing the hinge shaft not to be guided up and down by the guide hole when it rotates to be perpendicular to the valve body is supplied to the second outlet through the confluence pipe by contracting the elastic part with a relatively strong force and opening the stopper.

The pressure control unit may include: a lifting operation shaft that is installed so as to be able to move up and down inside the valve body and has an opening/closing stopper formed at the lower end to block the inlet; a piston installed in the middle of the lifting shaft; With respect to the piston, an elastic part consisting of a first spring installed on the lifting operation shaft to be disposed above the piston, and a second spring installed on the lifting operation shaft to be disposed between the piston and the stopper; and an operation lever rotatably connected to the upper end of the lifting operation shaft exposed to the upper portion of the valve body via a hinge shaft, the hinge being installed eccentrically to one side from the center of the lifting operation shaft; and the operation lever When the hinge shaft is rotated to be perpendicular to the valve body, the hinge shaft is moved upward by the operation lever to raise the lifting operation shaft, so that the oxygen supplied from the oxygen tank contracts the elastic part by a relatively weak force and closes the stopper. It is opened and supplied to the first outlet through the confluence pipe, and when the hinge shaft is rotated to be arranged in line with the valve body, the hinge shaft is moved downward by the operation lever to lower the lifting operation shaft, thereby supplying from the oxygen tank Oxygen is supplied to the second outlet through the confluence pipe by contracting the elastic part with a relatively strong force and opening the stopper.

The piston is characterized in that an O-ring is installed around the inner surface of the valve body to maintain airtightness.

The first discharge port discharges a gas mixture of oxygen and gas having a relatively constant pressure, and the second discharge port discharges a high-pressure gas whose oxygen pressure is relatively increased by the pressure adjusting unit.

According to the present invention, the pressure of oxygen supplied from the outside can be controlled by the pressure adjusting unit provided on the valve body to be supplied by a torch, thereby having a useful effect of easily cutting pipes or steel plates of various thicknesses.

1 is a configuration diagram schematically showing a valve system for an automatic gas cutter according to a first embodiment of the present invention.
2 is a cross-sectional view showing the inside of the valve body provided in the valve system for an automatic gas cutter according to the present invention.
3 is a bottom view of a torch provided in the valve system for an automatic gas cutter according to the present invention.
4 is a state diagram for explaining the principle of the valve system for an automatic gas cutter according to the present invention.
5 and 6 are cross-sectional views showing a valve system for an automatic gas cutter according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

first embodiment

1 to 3 , the valve system for an automatic gas cutter according to the present invention includes a valve body 100 , a pressure adjusting unit 110 , and a torch 200 .

The valve body 100 is provided such that the inlet 102 is formed in the lower part of the hollow tube body, and the confluence tube 104 is formed to protrude around the side surface of the tube body.

The torch 200 is connected to the valve body 100 and the merging pipe 104, and a first outlet 210 and a second outlet 220 are provided to separate and discharge the gas supplied therein. do.

In the present invention, oxygen and gas supplied from the oxygen tank 300 and the gas tank 310 in which LPG is stored by the valve body 100 and the torch 200 are discharged to the first outlet 210, and the oxygen tank Part of the oxygen of 300 is independently supplied to the fluid motor 400 used as the power source of the valve body 100 and the gas cutting device (not shown in the drawing), and then merged by the confluence pipe 104 to produce 2 is discharged through the discharge port 220 .

And the oxygen tank 300 is connected to the fluid motor 400 operated by a part of the oxygen supplied to the inlet 102 of the valve body 100 . That is, a certain amount of oxygen is supplied from the oxygen tank 300 to the fluid motor 400 to operate the gas cutting device.

Here, the fluid motor 400 is variously known in the art before the filing of the present invention, and since it is specifically disclosed in Patent Registration Publication No. 10-1811422 as an example, the structure of the fluid motor 400 in the present invention and A description of the operation will be omitted.

The pressure adjusting unit 110 is provided in the valve body 100 so as to increase the pressure of oxygen supplied from the oxygen tank 300 and supply it to the second outlet 220 , the lifting operation shaft 120 , and the piston 130 . ), and an elastic part 140 , and an operation lever 150 .

The lifting operation shaft 120 is installed so as to be lifted up and down inside the valve body 100 , and an opening/closing type stopper 124 is formed at the lower end to block the inlet 102 . At this time, the stopper 124 is formed in a wedge shape for smooth opening or blocking of the inlet 102 . The lifting operation shaft 120 is connected via an operation lever 150 and a hinge shaft 122 to be described later.

The piston 130 is installed in the middle of the lifting operation shaft (120). The piston 130 serves to maintain the airtightness of the valve body 100 . To this end, the piston 130 is provided with an O-ring 132 made of a rubber material around the circumference. That is, the O-ring 132 is in close contact with the inner surface of the valve body 100 to prevent gas from moving to the upper portion of the valve body 100 through the piston 130 .

The elastic part 140 is between the piston 130 and the first spring 142 installed on the lifting operation shaft 120 to be disposed on the upper part of the piston 130 and the piston 130 and the stopper 124 . It consists of a second spring 144 installed on the lifting operation shaft 120 so as to be disposed on. The elastic part 140 serves to contract and restore by the pressure of the gas supplied to the inlet of the valve body 100 .

The operation lever 150 is rotatably connected to the hinge shaft 122 at the upper end of the lifting operation shaft 120 exposed to the upper portion of the valve body 100 . In the operation lever 150 , a guide hole 151 for guiding the hinge shaft 122 of the lifting operation shaft 120 in the vertical direction is formed in the connection portion of the hinge shaft 122 .

When the pressure adjusting unit 110 configured as described above is rotated so that the operation lever 150 is arranged in line with the valve body 100 , the hinge shaft 122 can be guided up and down along the guide hole 151 , thereby enabling the oxygen tank. Oxygen supplied from 300 contracts the elastic part 140 by a relatively weak force and at the same time opens the stopper 124 to be discharged to the second outlet 220 through the confluence pipe 104 . That is, when the operation lever 150 is rotated to be arranged in line with the lifting operation shaft 120 , the torch 200 can discharge oxygen having a relatively constant pressure through the second discharge port 220 .

On the other hand, when the operation lever 150 is rotated to be perpendicular to the valve body 100, the hinge shaft 122 is fixed so as not to be guided up and down by the guide hole 151, so that the oxygen supplied from the oxygen tank 300 is elastic. The unit 140 is contracted with a relatively strong force, and at the same time the stopper 124 is opened to be discharged to the second outlet 220 through the confluence pipe 104 . That is, when the operation lever 150 is rotated to be perpendicular to the lifting operation shaft 120 , the valve body 100 can relatively increase the pressure of oxygen, so that the torch 200 is high pressure through the second outlet 220 . Oxygen can be released.

On the other hand, reference numerals '302', '304', and '312' not described in this embodiment denote an on/off valve, and '306' denotes a pressure control valve.

The on-off valve 302 plays a role in controlling oxygen supplied from the oxygen tank 300 to the first outlet 210 of the torch 200 , and the on-off valve 304 is the valve body from the oxygen tank 300 . (100) and plays a role of controlling the oxygen supplied to the fluid motor 400, the on/off valve 312 controls the gas supplied from the gas tank 310 to the first outlet 210 of the torch 200. play a controlling role. In addition, the pressure control valve 306 serves to regulate the pressure of oxygen supplied to the valve body 100 and the fluid motor 400 .

In particular, the on/off valve 304 can instantaneously control the running or stopping of the gas cutting device by the user's operation, and the pressure control valve 306 controls the amount of oxygen supplied to the valve body 100 according to the thickness of the iron plate. pressure can be adjusted.

Hereinafter, the principle of the valve system for an automatic gas cutter according to the present invention will be described with reference to FIGS. 1 and 4 .

Referring to FIG. 1 , oxygen and gas supplied from the oxygen tank 300 and the gas tank 310 are supplied to the torch 200 and mixed, and then discharged through the first outlet 210, and the oxygen tank ( Some of the oxygen of 300 is supplied to the torch 200 through the valve body 100 to be discharged to the second outlet 220 , and at the same time, some of the oxygen is supplied to the valve body 100 by the fluid motor. It is supplied to 400 and is used as a power source for driving the gas cutting device. Oxygen supplied to the fluid motor 400 is joined by the merging pipe 104 of the valve body 100 and finally discharged to the second outlet 220 of the torch 200 .

In the above state, when the operation lever 150 of the pressure control unit 110 is rotated to be arranged in line with the valve body 100 by the user, the lifting operation shaft 120 is operated by the hinge shaft 122 by the operation lever By maintaining a state capable of being guided up and down along the guide hole 151 of 150 , the oxygen supplied from the oxygen tank 300 is supplied by the elastic part 140 including the first spring 142 and the second spring 144 . ) is contracted by a relatively weak force and the stopper 124 can be opened. Accordingly, after oxygen is supplied to the torch 200 through the confluence pipe 104 of the valve body 100 at a constant pressure, it can be discharged through the second outlet 220 .

4, when the operation lever 150 of the pressure control unit 110 is rotated to be perpendicular to the valve body 100 by the user, the lifting operation shaft 120 is a hinge shaft fixed to the guide hole 151 ( Oxygen supplied from the oxygen tank 300 by maintaining the state in which it cannot be lifted with respect to the valve body 100 by the 122) elastic part 140 composed of the first spring 142 and the second spring 144 ) can be contracted by a relatively strong force and the stopper 124 can be opened. That is, the oxygen moves the lifting operation shaft 120 to the upper part of the valve body 100 only by high pressure by the hinge shaft 122 fixed so as not to be lifted up and down on the guiding hole 151 to the stopper 124 . can be opened, and accordingly, the high-pressure oxygen that has passed through the valve body 100 can be supplied to the torch 200 through the confluence pipe 104 and then discharged to the second outlet 220 . .

As described above, in the valve system for an automatic gas cutter according to the present invention, the pressure of oxygen supplied from the outside is adjusted by the pressure adjusting unit 110 provided in the valve body 100 to adjust the pressure of the torch 200 and the fluid. By being able to supply to the motor 400 , it is possible to easily cut pipes or steel plates of various thicknesses while driving the gas cutting device forward.

second embodiment

5 and 6, the valve system for a gas cutting device according to the present invention includes all the configurations of the valve system for an automatic gas cutting machine according to the first embodiment of the present invention described above.

However, the pressure regulating unit 110 presented in this embodiment has a different structure from the first embodiment of the present invention described above, and the structure of the pressure regulating unit 110 will be described in detail below.

The pressure control unit 110 includes an operation lever 152 rotatably connected to the hinge shaft 123 at the upper end of the lifting operation shaft 120 exposed to the upper portion of the valve body 100 .

Here, the hinge shaft 123 is connected to the operation lever 152 so as to be eccentric from the center of the lifting operation shaft 120 to one side. That is, as the hinge shaft 123 is eccentrically disposed from the center of the lifting operation shaft 120 to one side, it is interlocked with the rotation of the operation lever 152 to move in the lifting direction of the lifting operation shaft 120 .

Due to the eccentric structure of the hinge shaft 123 connecting the lifting operation shaft 120 and the operation lever 152 as described above, the operation lever 152 rotates to be perpendicular to the valve body 100 when the hinge shaft 123 is rotated. It is moved upward by the operation lever 152 to raise the lifting operation shaft 120 . As a result, the oxygen supplied from the oxygen tank 300 contracts the elastic part 140 by a relatively weak force and at the same time opens the stopper 124 to the second outlet 220 through the confluence pipe 104 . will be supplied

On the contrary, when the operation lever 152 is rotated to be arranged in line with the valve body 100 , the hinge shaft 123 is moved downward by the operation lever 152 to lower the lifting operation shaft 120 . As a result, the oxygen supplied from the oxygen tank 300 contracts the elastic part 140 with a relatively strong force and at the same time opens the stopper 124 and discharges it to the second outlet 220 through the confluence pipe 104 . will become That is, in this case, the pressure of oxygen can be increased by the descending structure of the lifting operation shaft 120 , so that high-pressure oxygen can be discharged through the second outlet 220 .

As described above, the valve system for the gas cutting device according to the present invention is supplied from the oxygen tank 300 by the eccentric structure of the hinge shaft 123 connecting the lifting operation shaft 120 and the operation lever 152 . It is possible to relatively increase the pressure of oxygen to be used, and the rest of the actions and effects are the same as those of the first embodiment.

In the foregoing, specific embodiments of the present invention have been described and shown, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the technical spirit or point of view of the present invention, and the modified embodiments should belong to the claims of the present invention.

100: valve body
102: inlet
104: confluence pipe
110: pressure control unit
120: lift operation shaft
121: invitation
122, 123: hinge shaft
130: piston
140: elastic part
150, 152: operation lever
200: Torch
210: first outlet
220: second outlet
300: oxygen tank
310: gas tank
400: fluid motor

Claims (5)

Oxygen tank in which oxygen is stored;
a gas tank in which gas is stored;
a fluid motor using the oxygen as a power source;
a torch connected to the valve body and having a first outlet and a second outlet for separating gas supplied to the inside; and
Some of the oxygen supplied from the oxygen tank is supplied to the inlet, and the other part is fed into the confluence pipe after being supplied from the fluid motor. Including; a valve body having a pressure regulating unit for supplying
the torch
Oxygen and gas are mixed and supplied to the first outlet, and the oxygen discharged from the valve body is supplied to the second outlet, a valve system for an automatic gas cutter. According to claim 1,
The pressure regulator
a lifting operation shaft capable of lifting and lowering from the inside of the valve body, the lower end of which can block the inlet;
a piston installed on the lifting operation shaft;
an elastic part installed on the lifting operation shaft; and
A valve system for an automatic gas cutting machine, including; an operation lever installed at the upper end of the lifting operation shaft. 3. The method of claim 2,
The elastic part
a first spring disposed above the piston; and
A valve system for an automatic gas cutter having a; a second spring disposed under the piston. 3. The method of claim 2,
The operation lever is
A valve system for an automatic gas cutter comprising a; rotatably connected to the lifting operation shaft via a hinge shaft, and guide hole for guiding the lifting operation shaft in the vertical direction at the connection portion of the hinge shaft. 3. The method of claim 2,
The operation lever is
A valve system for an automatic gas cutter that is rotatably connected to the lifting operation shaft via a hinge shaft, and the hinge shaft is installed to be eccentric from the center of the lifting operation shaft to one side.

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