KR101763124B1 - Welding apparatus - Google Patents

Abstract

The present invention relates to a welding apparatus which is easy to use. According to the present invention, the welding apparatus comprises: a main body including an oxygen supply pipe and a gas supply pipe through which oxygen and gas are supplied respectively; a cut-off valve installed in the oxygen and gas supply pipes of the main body to automatically open/close each pipe; a mixer installed in the main body to mix the oxygen and the gas supplied through the oxygen and gas supply pipes; a torch connected to the mixer to ignite a mixed gas ejected to an end part thereof; an electronic expansion valve installed between the mixer and each supply pipe respectively, to automatically control a flow rate of oxygen and gas supplied to the mixer; a holder outwardly protruding from the main body to cut off the supply of oxygen and gas when the torch is hung, and to automatically supply oxygen and gas when the torch is removed; an ignition device installed in the main body to supply power when the torch is removed from the holder to generate a spark; and a controller to control the cut-off valve, the electronic expansion valve, and the ignition device dependent on holding of the torch.

Description

Welding apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus, and more particularly, to a welding apparatus capable of storing various flames provided in a torch when welding, so that a desired flame can always be maintained constant.

In general, welding is a joining method in which a metal material is metallurgically bonded by heating, pressurizing, or the like, and is metallurgically classified into fusion welding, pressure welding, and brazing and soldering .

Among these welding operations, gas welding and brazing and soldering are the most commonly used methods. These gas joining methods use a high temperature generated by the reaction of various kinds of heating gas with oxygen, that is, gas combustion heat as a heat source This is a joining method in which a mixed gas of a heating gas and oxygen is ejected and burned from the end of a gas torch to produce gas heat, which is used as a heat source for welding.

The apparatus used in this gas welding process consists of an oxygen storage tank, a gas storage tank, and a connecting hose extending from each tank, and a torch connected to the connecting hose.

At this time, the torch is composed of a handle, a ditch chamber in which oxygen and gas supplied through the connecting hose are mixed, and a crater for ejecting the mixed gas mixed in the ditch chamber to the outside.

A manual flow rate control valve is provided at the handle to control the amount of oxygen and gas flowing from each storage tank into the churn chamber.

When the operator performs the welding operation using such a device, the flow control valve provided in the torch is manually opened to inject the mixed gas to the outside of the firebox, and then a lighter is used to fire the firebox, A flame is generated, and welding is performed through the generated gas flame. When the welding operation is stopped, the operator closes the flow control valve to prevent oxygen and gas from flowing into the welding torch side, thereby extinguishing the gas flame of the pipe. When the welding operation is resumed, the operator again opens the flow control valve The lighter is turned on to generate a gas flame.

Therefore, the operator has to stop or restart the gas supply to the welding torch by opening / closing the flow control valve provided in the torch every time the welding operation is stopped and restarted during the welding operation.

Further, there is a disadvantage that oxygen and gas are wasted due to the time delay due to the operation of the flow control valve and the lighter when the flame is removed from the torch or the flame is generated.

In order to overcome such disadvantages, in the past, an automatic cutoff gas saving device for a welding machine has been proposed in Korean Patent No. 10-1254656 (hereinafter referred to as "prior art document").

In this prior art document, a connection block for connecting the oxygen input line and the oxygen output line in parallel is provided in the housing, the oxygen input line includes an oxygen needle valve for manually adjusting the supply amount of oxygen, An oxygen solenoid valve that is opened or closed in response to a signal of a control unit located in the upper chamber, and an oxygen transfer pipe that communicates the oxygen solenoid valve and the oxygen pressure gauge. The connection block communicates the gas input line and the gas output line in parallel, A gas solenoid valve that is opened or closed in response to a signal of a control unit positioned directly above the connection block, and a gas delivery pipe which communicates the gas solenoid valve and the gas pressure gauge, An oxygen display portion having an oxygen setting portion for indicating a pressure state of oxygen supplied to the front surface, Having a gas pressure set indicating the state of the gas-level display portion is installed gas welder automatically block type gas for reduction device is disclosed.

The ignition plug is installed at the center of the ignition inlet, so that the gas mixture injected at the time of the proximity of the torch is injected along the inclined surface of the ignition plug Also disclosed is an automatic shut-off gas saving device for a welder which is ignited by a spark of an ignition plug while being moved to the center of the space.

However, in the prior art document, oxygen and gas are separately supplied through the input line and the transfer pipe, so that it is troublesome for the operator to adjust the oxygen and gas supply amount through each needle valve, and the oxygen supply amount and the gas supply amount There is a problem that it is difficult to precisely control the supply amount thereof because it is manually controlled.

The welding apparatus as described above and the technology therefor are described in detail in the following prior art documents, so that a detailed description thereof will be omitted.

Korean Patent No. 10-1254656

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a welding apparatus capable of supplying a mixed gas containing oxygen and a gas to a torch so as to control the torch.

It is another object of the present invention to provide an apparatus and a method for controlling an apparatus and a method for controlling the apparatus by inputting various supplied amounts of oxygen and gas to store and control the mixing ratio thereof and to constantly generate various flames according to the mixing ratio of the mixed gas, And to provide a welding apparatus for welding.

According to an aspect of the present invention, there is provided a welding apparatus including: a main body having an oxygen supply pipe and a gas supply pipe to which oxygen and gas are respectively supplied; A shut-off valve provided in the oxygen supply pipe and the gas supply pipe of the main body, respectively, for automatically opening and closing the respective pipes; A mixer provided in the body for mixing oxygen and gas supplied through the oxygen supply pipe and the gas supply pipe; A torch connected to the mixer for igniting the mixed gas ejected to the end thereof; An electronic expansion valve provided between the mixer and each of the supply pipes for automatically controlling supply amounts of oxygen and gas supplied to the mixer; A holder for protruding outwardly from the main body, for blocking the supply of oxygen and gas when the torch is applied, and automatically supplying oxygen and gas when the torch is removed; An ignition device provided in the main body and supplied with power when the torch is detached from the mount to generate a spark; And a controller for controlling the shut-off valve, the electronic expansion valve, and the ignition device according to whether the torch is stationed or not.

Preferably, the controller is provided to automatically control the flame by storing the mixture ratio of oxygen and gas according to the opening amount of each electronic expansion valve.

In addition, the cradle is provided with one side thereof rotatably coupled to the main body so as to rotate forward and backward depending on whether the torch is stationed or not. The limit switch is provided in the main body and is switched by the rotation of the cradle to automatically control supply of oxygen and gas. May be provided.

In addition, the main body may be provided with a pedestal supporting the pedestal rotated by the mounted torch, and the pedestal may be provided with an elastic member for elastically supporting the rotated pedestal while reversing the pedestal when the torch is detached from the pedestal have.

According to the welding apparatus of the present invention, it is possible to precisely control the flame by controlling the mixture ratio of the mixed gas supplied to the torch by inputting and storing various amounts of supply of oxygen and gas.

According to the present invention, the mixing ratio of the mixed gas to be supplied to the torch is stored in the controller, so that a desired flame can be constantly generated and used conveniently.

Fig. 1 is a view showing a combined structure of a welding apparatus according to the present invention.
2 is an enlarged view of a main body of a welding apparatus according to the present invention.
Fig. 3 is a configuration diagram showing the internal structure of a welding apparatus according to the present invention.
4 is an exploded view of a welding apparatus according to the present invention.
Fig. 5 is a view showing a state in which a torch of a welding apparatus according to the present invention is mounted on a cradle.
6 is a view showing a state in which the torch of the welding apparatus according to the present invention is drawn out.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 are views showing a welding apparatus according to the present invention.

1 to 4, a welding apparatus 100 according to the present invention includes a base plate 110 having a castor 111 rotatable on a lower surface thereof, And a main body 200 fixedly mounted on the upper end of the support base 120. The main body 200 is fixed to the upper end of the support base 120,

The main body 200 is provided with a fixing plate 210 fixed to the support table 120 and a cover 220 fixedly coupled to the front surface of the fixing plate 210.

The cover 220 covers the front surface of the fixing plate 210 and the controller 300 and the shutoff valves 240 and 270 provided on the front surface of the fixing plate 210 are protruded to the outside of the cover 220 Respectively.

2 to 4, an oxygen supply pipe 230 for supplying oxygen and a gas supply pipe 260 for supplying gas are connected to the bottom of the fixed plate 210, And a mixer 290 is provided between the oxygen supply pipe 230 and the gas supply pipe 260 to store the mixed gas in which the supplied oxygen and gas are mixed.

Each of the oxygen supply pipe 230 and the gas supply pipe 260 is formed in a shape of an inverted U shape so as to be connected to the mixer 290 and the mixer 290 is connected to the mixer 290 for discharging a mixed gas in which oxygen and gas are mixed A mixed gas discharge pipe 291 is provided and a torch 800 is connected to the mixed gas discharge pipe 291 to ignite the mixed gas supplied from the mixer 290 to generate a flame.

In the oxygen supply pipe 230 and the gas supply pipe 260 as described above, when the torch 800 is mounted on the cradle 400 to be described later, the flow paths of the supply pipes 230 and 260 are closed to supply oxygen and gas And shut-off valves 240 and 270 are provided to shut off the torch 800 and to secure the flow path of the supply pipes 230 and 260 and to supply oxygen and gas when the torch 800 is removed from the mount stand 400 .

The shut-off valves 240 and 270 may be solenoid valves operated by power supply by the switching operation of the limit switch 500, which will be described later.

Electronic expansion valves 250 and 280 for automatically controlling opening amounts of the supply pipes 230 and 260 are installed in the supply pipes 230 and 260 above the shut-off valves 240 and 270, And the opening amount of each of the supply pipes 230 and 260 is adjusted by the electronic expansion valves 250 and 280 so that the flame can be controlled.

The electronic expansion valves 250 and 280 may be controlled by a controller 300 to be described later and the opening amounts of the respective electronic expansion valves 250 and 280 are input to the controller 300.

That is, the amount of opening of the electronic expansion valve 250 for oxygen and the opening amount of the electronic expansion valve 280 for the gas corresponding to the opening amount of the oxygen expansion valve 250 are variously adjusted and stored for each channel in the controller 300, The mixing ratio of the mixed oxygen and gas can be variously stored, and the flame generated in the torch 800 can be variously stored.

Accordingly, the opening amount of the oxygen and gas electronic expansion valves 250 and 280 is precisely controlled according to the channel stored in the controller 300, so that the specific flame suitable for the welding operation can be constantly ignited on the torch 800 .

The controller 300 is fixed to the fixing plate 210 on the electronic expansion valve 250 and the controller 300 protrudes to the outside of the cover 220.

The controller 300 displays the current working state of the welding apparatus 100 on the front surface protruded outward through the cover 220 and displays the controller 300, which is protruded outside the cover 220, May be directly operated.

The mounting plate 400 is rotatably coupled to the fixing plate 210 on the controller 300.

2 and 4, one side of the holder 400 is rotatably coupled to the fixing plate 210 of the main body 200, and the holder 400 is rotated about the hinge portion 410, .

The holder 400 is formed with a hook portion 420 bent in a U-shaped or V-shaped shape so as to stably hang the torch 800 on the tip portion protruding to the outside of the main body 200 And the rear end portion is formed as a switching portion 430 for switching the limit switch 500 to be described later while being rotated about the hinge portion 410.

When the torch 800 is hooked on the hook 420 of the cradle 400, the switching unit 430 of the rear end is rotated upward to switch the limit switch 500, The shutoff valves 240 and 270 provided in the supply pipes 230 and 260 are closed to shut off the flow paths of the supply pipes 230 and 260 to block the supply of oxygen and gas. When the torch 800 is detached from the hooking part 420, the switching part 430 of the rear end part is rotated downward to turn off the switching of the limit switch 500. As a result, The valves 240 and 270 are controlled to open the flow paths of the supply pipes 230 and 260 to smoothly supply oxygen and gas.

The pedestal 400 is supported at a lower portion of the front end of the pedestal 400 by supporting the lower surface of the pedestal 400 and supports the pedestal 400 when the torch 800 is mounted. Can be prevented from being excessively rotated.

The pedestal 600 is fixed to the main body 200 under the pedestal 400 and a cylindrical protrusion 610 protrudes from the upper surface of the pedestal 400. The protrusion 610 is provided with an elastic member 620 So that the lower surface of the holder 400 is elastically supported.

The elastic member 620 of the pedestal 600 is compressed by the pedestal 400 that is rotated when the torch 800 is mounted and the elastic force of the elastic member 620 when the torch 800 is detached, And the switching unit 430 of the rear end of the holder 400 is separated from the limit switch 500 so that the contact of the limit switch 500 is turned off.

The elastic member 620 is compressed by the cradle 400 that is rotated in a state in which the lower surface of the cradle 400 is elastically supported and is pressed against the member surface having an elastic force capable of reversing the cradle 400 by a tensile force. However, in this embodiment, the compression coil spring is exemplified as a preferred embodiment of the elastic member 620. [

An engaging groove 440 is formed in the lower surface of the holder 400 corresponding to the elastic member 620 with an upper end of the elastic member 620 inserted therein. Accordingly, the upper end of the elastic member 620 is compressed and tensioned in a state where the upper end of the elastic member 620 is inserted into the coupling groove 440 of the cradle 400, thereby enabling stable operation.

A limit switch 500 is fixed to the main body 200 on the upper portion of the switching unit 430 of the cradle 400 and a switching unit 430 of the cradle 400 is fixed to the lower portion of the limit switch 500, And a switch lever 510 for turning on / off the contact of the limit switch 500 by the switch lever 510. [

When the switch lever 510 is in the ON state, the controller 300 controls the shutoff valves 240 and 270 to close the flow paths of the supply pipes 230 and 260, The controller 300 opens the flow paths of the supply pipes 230 and 260 through the shutoff valves 240 and 270 to supply the oxygen and the gas I will.

On the other hand, an ignition device 700 for generating a spark on the upper surface of the main body 200 to ignite the flame on the torch 800 is provided.

The ignition device 700 includes an inclined surface 710 whose inner circumferential surface gradually narrows from the front to the rear so as to guide the torch 800 inserted into the ignition device 700 to the inner center of the ignition device 700 And an ignition plug 720 is provided at an inner center rear portion of the ignition device 700 to generate a spark.

Accordingly, when the torch 800 is inserted into the igniter 700, the torch 800 is guided to the spark plug 720 side by the inclined surface 710 of the inner periphery of the igniter 700, As shown in FIG.

Although not shown in the drawing, the ignition device 700 may be provided with a sensor for sensing the torch 800 inserted into the ignition device 700, The operation of the ignition plug 720 is controlled.

Then, the welding apparatus 100 configured as described above and the respective constitutions constituted thereby are all programmed and controlled by the controller 300.

In the drawings of the present invention, reference numeral 900 denotes a power switch for supplying and disconnecting power to the welding apparatus 100 as described above.

The operation of the welding apparatus according to the present invention will now be described.

5, when the torch 800 is hooked on the hook 420 of the cradle 400 protruded to the outside of the main body 200, the cradle 400 rotates counterclockwise about the hinge 410 The hooking part 420 of the front end part is lowered and the switching part 430 of the rear end part is raised and the switch lever 510 of the limit switch 500 is pressed to turn on the contact point.

The controller 300 controls the shutoff valves 240 and 270 provided in the oxygen supply pipe 230 and the gas supply pipe 260 by the ON contacts of the limit switch 500 so that the respective supply pipes 230 and 260 To shut off the supply of oxygen and gas.

At this time, the elastic member 620 of the pedestal 600 is compressed by the rotating platform 400 as described above.

6, when the torch 800 is lifted and lifted from the holder 400, the compressed elastic member 620 is tensioned, and the holder 400 is rotated in the reverse direction, And the switching unit 430 is lowered.

On the other hand, the switch lever 510 of the limit switch 500 is restored to its original state by the lowered switching unit 430 and the contact is turned off by the off-contact of the limit switch 500, 240) 270 so that oxygen and gas are supplied smoothly by opening the flow paths of the supply pipes 230, 260.

The supplied oxygen and gas are supplied to the mixer 290 as much as the amount of opening of each of the electronic expansion valves 250 and 280, and mixed gas mixed at a certain mixing ratio is supplied to the torch 800 and is sprayed.

Thus, when the torch 800 is inserted into the ignition device 700, the insertion of the torch 800 is sensed by the controller 300 to activate the spark plug 720 and the spark generated from the spark plug 720 To ignite the flame in the torch 800.

As described above, the ignition operation of the torch 800 can be performed by the operator directly controlling the amount of opening of the electronic expansion valves 250 and 280 through the controller 300 to ignite the desired flame. However, It is also possible to ignite the spark through the controller 300 at all times.

That is, since the amount of opening of the oxygen expansion valve 250 and the amount of opening of the gas expansion valve 280 are input to the controller 300 in a plurality of channels, the flame necessary for the welding operation Can be always generated and used precisely.

Therefore, in the welding apparatus 100 according to the present invention, the mixing ratio of the mixed gas supplied to the torch 800 can be adjusted by adjusting the supply amounts of oxygen and gas to various channels and storing the flame, It is always constantly generated and can be used easily.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: welding apparatus 110: base plate
111: Caster 120: Support
200: main body 210: fixed plate
220: cover 230: oxygen supply pipe
240,270: Shut-off valve 250,280: Electronic expansion valve
260: gas supply pipe 290: mixer
291: Mixed gas discharge pipe 300: Controller
400: cradle 410: hinge
420: Hanger part 430: Switching part
440: coupling groove 500: limit switch
510: switch lever 600: pedestal
610: protrusion 620: elastic member
700: ignition device 710: incline surface
720: Spark plug 800: Torch
900: Power switch

Claims (5)

A main body having an oxygen supply pipe and a gas supply pipe to which oxygen and gas are respectively supplied;
A shut-off valve provided in the oxygen supply pipe and the gas supply pipe of the main body, respectively, for automatically opening and closing the respective pipes;
A mixer provided in the body for mixing oxygen and gas supplied through the oxygen supply pipe and the gas supply pipe;
A torch connected to the mixer for igniting the mixed gas ejected to the end thereof;
An electronic expansion valve provided between the mixer and each of the supply pipes for automatically controlling supply amounts of oxygen and gas supplied to the mixer;
A holder for protruding outwardly from the main body, for blocking the supply of oxygen and gas when the torch is applied, and automatically supplying oxygen and gas when the torch is removed;
An ignition device provided in the main body and supplied with power when the torch is detached from the mount to generate a spark; And
And a controller which protrudes outside the cover and controls the shut-off valve, the electronic expansion valve and the ignition device according to whether the torch is stationed or not,
In the controller, the mixture ratio of oxygen and gas according to the opening amount of each electronic expansion valve is stored for each channel, so that the controller can select the corresponding channel for each welding operation,
The holder is rotatably coupled to the body at one side thereof, and rotates forward and backward according to whether the torch is stationary.
And a limit switch provided in the main body for automatically controlling the supply of oxygen and gas by being switched by rotation of the cradle,
The main body is provided with a pedestal for supporting a pedestal rotated by the mounted torch,
The base is provided with an elastic member for supporting the rotated base from the bottom while reversing the base when the torch is detached from the base, and a defect groove having an upper end of the elastic member inserted into the base.
The ignition device is formed as an inclined surface whose inner circumferential surface gradually becomes narrower from the front to the rear so that the torch inserted into the ignition device can be guided to the inner center of the ignition device and a spark plug . delete delete delete delete

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