WO2017183761A1

WO2017183761A1 - Portable welding power supply device having electrode conversion apparatus and welding torch head cooling and welding fume treating apparatus

Info

Publication number: WO2017183761A1
Application number: PCT/KR2016/005138
Authority: WO
Inventors: 권도형
Original assignee: 권도형
Priority date: 2016-04-21
Filing date: 2016-05-16
Publication date: 2017-10-26

Abstract

The present invention relates to a portable welding power supply device having an electrode conversion apparatus and a welding torch head cooling and welding fume treating apparatus. The present invention, which is provided on an integrated welder having a ground port and a torch connection port and is for converting the polarity of a current output by means of the ground port and torch connection port, comprises: a fixed body having a plurality of electrodes connected to a torch connection port and a ground port; a conversion electrode unit placed in correspondence with the fixed body, selectively connecting the electrodes and converting the polarity of a current output by means of the ground port and torch connection port; and an operating means for selectively making connections by means of converting the position of the conversion electrode unit. The portable welding power supply device having an electrode conversion apparatus and a welding torch head cooling and welding fume treating apparatus, according to the present invention, has a very simple structure, is compact, enables simple manipulation and thus can easily be utilized. Moreover, the portable welding power supply device enables a visual display of whether the polarity being output is straight polarity or reverse polarity and thus can accurately be used even by a beginner. And the electrode conversion apparatus and the welding torch head cooling and welding fume treating apparatus, according to the present invention, can lower the temperature of a welding torch by means of applying an air pump and a valve and guiding the filtered cooling air to the torch or absorbing the heat around the torch. Therefore, an enhanced cooling effect can be obtained. In particular, when absorbing the heat, welding fume can be sucked in and be purified and thus problems caused by the welding fume or fine dust can be resolved.

Description

Portable welding power supply with electrode conversion device, welding torch head cooling and welding fume processing device

The present invention relates to a welding machine used for electric welding, and more particularly, to a portable welding power supply device having an electrode conversion device of the integrated welding machine.

In addition, the present invention relates to a welding device, and more particularly, to a portable welding power supply device having an electrode conversion device, a welding torch head cooling, and a welding fume treatment device.

Welding is a joining method in which separate and joined metal materials to be bonded to each other are heated and melted in a state where they are joined together or overlapped. It is a technology widely used throughout the industry including the fields of machinery and civil engineering, as well as electrical and electronic fields, and is being continuously developed to meet demands such as high quality, high productivity, and safety.

Such welding may be classified into CO2 welding, MIG welding, MAG welding, TIG welding, etc., depending on the material to be welded and the amount of current used, or may be classified into arc welding or gas welding depending on whether electricity is used or gas. .

The arc welding of the above welding is a welding method of inducing arc discharge for welding, and includes carbon arc welding, metal arc welding, and high frequency arc welding. In addition, the CO2 welding and the MIG welding of the arc welding is a welding method using a consumable electrode.

That is, by continuously supplying the front end of the wire electrode continuously released from the reel into the arc formed in the base material so that the wire electrode is melted by heat, thereby forming a melted portion welded to the base material and welding while the melted part solidifies. To lose.

In contrast, TIG welding is a welding method using a non-consumable tungsten electrode, which generates an arc between the electrode and the base material and supplies welding rods to achieve welding.

In particular, unlike CO2 welding or MIG welding, TIG welding connects the positive electrode to the base material and connects the negative electrode to the welding torch, and CO2 welding or MIG welding connects the negative electrode to the base material and the plus electrode to the welding torch. Do this.

Accordingly, when one welder needs to be alternately used for CO2 welding and TIG welding, the worker has to open the cover of the welding machine, loosen the bolts inside, and replace the welding wire manually to switch the polarity. This is very inconvenient and causes a great deal of loss of work efficiency.

In order to solve such a problem, Korean Registered Utility Model Publication No. 20-0380648 (electrode switching device of an arc combined TIG welding machine) has been proposed. In the conventional switching device, the contact lever is rotatably installed on the DC supply plate, and the contact lever is rotated by a remote operation through a cylinder and control switch operated by a solenoid valve and a gas to selectively perform arc welding or TIG welding. It is comprised so that it can be performed.

However, the conventional electrode switching device has a disadvantage that the configuration is very complicated, bulky and heavy because it includes a solenoid valve and a control switch as well as a cylinder and various link mechanisms.

On the other hand, the welding of the wire feeding method is efficient because the welding operation proceeds continuously, but the welding current increases according to the feeding speed of the wire electrode. However, when welding for a long time with increased large current, the power cable of the welding torch is overheated and damaged or there is a danger of fire. In addition, torch nozzles, insureds, etc. can easily wear out, resulting in a reduction in work efficiency, such as shortening the life of the torch.

Accordingly, there have been attempts to make the cross-sectional area of the power cable large or to apply the water cooling device to circulate the coolant through the torch front end. However, increasing the cross-sectional area of the power cable causes an increase in cost, increases the weight of the torch and lowers work efficiency, and in the case of the application of a water cooling device, there is a risk of welding defect due to leakage.

For this reason, a method of cooling the torch using cooling air has also been proposed. For example, Korean Patent No. 10-0680240 discloses a technology in which cooling air is contacted to the outer circumferential surface of a power cable and a torch to perform cooling, and an air induction pipe for inducing the supplied air to the rear of the torch is applied. It is introduced.

By the way, the welding torch disclosed in the above-mentioned prior document is intended to cool by receiving air from the outside, but is not supplied after filtering the cooling air, so that contaminants enter the air passage together with the air. It has the disadvantage that it can be. If dust or fine sand enters the air passage, the passage will be gradually blocked and the expected cooling effect will not be achieved.

The present invention has been made to solve the above problems, the structure is very simple and compact in size as well as light in weight, it is excellent in utilization, and furthermore, the operation method is very simple and the polarity currently being output is reversed. The object of the present invention is to provide an electrode conversion device for an integrated welder, which enables the correct use even by a beginner because it visually displays the polarity.

In addition, the present invention has been created to solve the above problems, by applying an air pump and a valve, it is possible to lower the temperature of the welding torch by inducing filtered cooling air to the torch or by absorbing heat around the torch, more effective cooling The purpose of the present invention is to provide a welding torch head cooling and welding fume treatment device that can solve the problem caused by the welding fume, in particular, by inhaling the welding fume at the same time during endotherm.

Electrode converting apparatus of the integrated welder of the present invention for achieving the above object is installed in the integrated welder provided with a grounding port and a torch connection port, to switch the polarity of the current output through the grounding port and the torch connection port. A fixed body having a plurality of electrodes connected to the ground port and the torch connection port; A switching electrode part disposed corresponding to the fixed body and selectively connecting the electrodes to switch the polarity of the current output to the ground port and the torch connection port; And operating means for making a selective connection by switching positions of the switching electrode portions.

In addition, the fixed body; A first upper electrode, a first intermediate electrode and a second upper electrode which are arranged to be spaced apart from each other, and a first lower electrode which is spaced apart from the first upper electrode, the first intermediate electrode, and the second upper electrode; And a fixed electrode having a second intermediate electrode and a second lower electrode.

In addition, the switching electrode unit; It is provided so as to be movable in a position opposite to the fixed electrode, the first upper electrode and the first intermediate electrode, the first lower electrode and the second intermediate electrode at the same time, or the second upper electrode and the first intermediate electrode, It characterized in that it comprises a moving electrode unit for connecting the second lower electrode and the second intermediate electrode at the same time.

In addition, the first intermediate electrode is connected to the torch connection port, the second intermediate electrode is connected to the ground port, and the anode current, the first lower electrode and the second upper electrode are connected to the first upper electrode and the second lower electrode. A cathode current is input.

In addition, an anode current is input to the first intermediate electrode, a cathode current is input to the second intermediate electrode, and the first upper electrode and the second lower electrode are connected to the torch connection port, and the first lower electrode and the second upper electrode are connected to each other. The ground port is characterized in that the connection.

In addition, the fixed electrode portion is formed with a through-hole supporting hole extending in the horizontal direction, the moving electrode portion is provided with a through hole corresponding to the support hole in the state that the moving body is aligned with respect to the fixed electrode portion, The operation means includes a supporter extending in the longitudinal direction to penetrate the support hole and the through hole, a locking member fixed to one end of the supporter to prevent the supporter from being separated from the support hole, and having passed through the through hole. Coupled with the supporter, characterized in that it comprises a lever for manipulating the position of the movable electrode.

In addition, stopper pins are fixed to upper and lower ends of the movable electrode part, and the fixed electrode part includes a pin receiving groove for accommodating stopper pins while the movable electrode part is connected to the fixed electrode part to prevent movement of the movable electrode part. It is characterized by being formed.

On the other hand, the welding torch head cooling and welding fume processing apparatus of the present invention for achieving the above object, by selectively controlling the intake and exhaust to cool the head of the welding torch, the fume can be removed, the air connector to which the air cable is connected And an air pump installed in the welding power supply having a control unit, and configured to discharge or intake air through the air connector, the air pump being operated by the control unit. A valve which is connected to the air pump and allows the cooling air to be supplied to the welding torch side when the air pump is operated, or passes the fume gas sucked in the vicinity of the welding torch therein; An inlet air filter connected to the valve and filtering air supplied to the welding torch through the valve when the air pump is operated; It is connected to the valve is characterized in that it comprises a dust removal filter that is intake at the welding torch side during operation of the air pump to pass the gas passing through the valve and to filter.

In addition, the valve; The first and second ports are located at one side, and the third, fourth and fifth ports are located at the opposite side, and have two internal flow paths switched by the controller. The first and second ports have inlets of the air pump. And a first intermediate tube and a second intermediate tube communicating with the outlet, respectively, and a connection tube is connected between the fifth port and the air connector.

In addition, the valve; The outside air inlet tube for inducing the air passing through the inlet air filter, a discharge tube for receiving the intake gas from the torch head to guide the dust removal filter side, and a connection tube connected to the air connector is provided, the air pump Is characterized in that the pump of the intake and discharge direction is switched by the control unit.

The electrode conversion device of the integrated welding machine of the present invention made as described above is very simple in structure, compact in size and light in weight, and thus has excellent utility, and furthermore, the operation method is very simple and the polarity currently output is positive. Visual display, whether polar or reverse polarity, ensures correct use even for beginners.

In addition, the welding torch head cooling and welding fume treatment apparatus of the present invention made as described above can reduce the temperature of the welding torch by applying an air pump and a valve, inducing filtered cooling air to the torch or absorbing heat around the torch. Therefore, a more effective cooling effect can be obtained, and in particular, during endotherm, welding fume can be inhaled and purged at the same time, thereby solving problems caused by welding fume or fine dust.

1 is a perspective view of a portable welding power supply device to which the electrode conversion device according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view illustrating the electrode converter shown in FIG. 1 separately.

FIG. 3 is an exploded perspective view of the electrode converter shown in FIG. 2.

FIG. 4 is a perspective view of the electrode converter shown in FIG. 2 viewed at different angles. FIG.

5A and 5B are views for explaining the operation of the electrode converter.

6 is a cutaway perspective view for explaining the configuration of the welding torch head cooling and welding fume treatment apparatus according to an embodiment of the present invention.

7 is a view showing a dust removal filter and an inlet air filter included in the welding torch head cooling and welding fume treatment apparatus.

* Major sign in the drawing

1 to 5

11: Integrated welding machine 13: Casing 15: Electrode converter

15a: Lever 15b: Cover plate 15c: Guide hole

15d: movable electrode portion 15e: through hole 15f: stopper pin

15g1: upper movable electrode 15g2: lower movable electrode 15h: movable body

15k: fixed electrode section 15m: fixed body 15n: pin receiving groove

15p1: first upper electrode 15p2: first lower electrode 15q1: second upper electrode

15q2: second lower electrode 15s: support hole 15t1: first intermediate electrode

15t2: Second intermediate electrode 15u: Male thread rod 15v: Spring

15w: latching member 15x: inner cover 17: grounding port

19: Torch connection port 21, 23: Display part 26: First electrode part

28: second electrode portion 30: switching electrode portion

6 to 7.

11: Welding power supply unit 13: Casing

15: Control panel 17: Air connector

19: changeover switch 21: internal space

23: valve 23a: first port

23b: second port 23c: third port

23d: fourth port 23e: fifth port

25: external air inlet tube 27: discharge tube

29: first intermediate tube 31: second intermediate tube

33: air pump 35: connection tube

37: bottom 39: dust removal filter

41: inlet air filter 43: control unit

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an integrated welder 11 to which an electrode conversion device 15 according to an embodiment of the present invention is applied.

As shown, the electrode conversion device 15 of the integrated welder according to the present embodiment is supported by the casing 13 of the integrated welder 11, that is, a part thereof, that is, the cover plate 15b and the lever 15a. Is exposed to the outside. The integrated welder 11 is a welding machine capable of performing CO2 welding, MIG welding, or TIG welding.

The electrode converter 15 has a structure shown in Figs. 2 to 4, and functions to switch output electrodes as necessary. For example, the negative electrode may be sent to the ground port 17 and the positive electrode to the torch connection port 19, or the positive electrode may be output to the ground port 17 and the negative electrode to the torch connection port 19.

The cover plate 15b and the lever 15a constituting the electrode converter 15 are exposed to the outside of the casing 13 so that the user can simply operate the lever 15a according to the work. For example, the lever 15a is swept side to side along the guide hole 15c formed in the cover plate 15b.

On the other hand, the

display portions

21 and 23 are located at the side portions of the ground port 17 and the torch connection port 19. The

displays

21 and 23 are marked with figures + and-, and have a lamp (not shown) behind them. A total of four lamps are installed.

The lamp is selectively lit, for example, when the + is lit in the ground port 17, the − part is lit in the torch connecting port 19. FIG. On the contrary, when-is lit in the ground port 17, + is lit in the torch connection port 19.

In this way, since the lighting state of the electrodes output from each of the ground port 17 and the torch connection port 19 can be visually checked, not only an operator but also a work supervisor or a technical leader can confirm whether power of the correct electrode is currently supplied. .

Detailed configuration of the electrode conversion device 15 will be described below with reference to FIGS. 2 to 4.

FIG. 2 is a perspective view separately showing the electrode converter 15 shown in FIG. 1, and FIG. 3 is an exploded perspective view of the electrode converter 15. As shown in FIG. 4 is a view of the electrode conversion device 15 observed at different angles.

2 to 4, the electrode converter 15 is fixed inside the casing 13 and includes a fixed electrode part 15k having a plurality of electrodes to be described later, and the fixed electrode part 15k. A movable electrode part 15d, which is positionally adjustable left and right by the user in contact with the elastic member, elastic separation means for elastically separating the moving electrode part 15d from the fixed electrode part 15k, and the fixed electrode part 15k. The cover plate (15b) and a lever (15a) is connected to the moving electrode portion 15d through the cover plate (15b) to move the moving electrode portion (15d) to the left and right.

First, the fixed electrode part 15k is bolted and coupled to the casing 13 and has a support body 15m having a support hole 15s at the center thereof, and is disposed in a straight line on an upper portion of the support hole 15s. The first upper electrode 15p1, the first intermediate electrode 15t1, the second upper electrode 15q1, the first lower electrode 15p2, and the second intermediate electrode positioned in a line below the support hole 15s. An electrode 15t2 and a second lower electrode 15q2 are included.

The fixed body 15m is formed of an insulating material and has two pin receiving grooves 15n at the upper and lower ends thereof. The pin receiving groove 15n is a groove having a predetermined interval, and accommodates and supports the stopper pin 15f to be described later.

On the other hand, the moving electrode portion 15d has a shape of a block and is fixed to the moving body 15h having a through hole 15e in the center and the moving body 15h. And an upper movable electrode 15g1 disposed above and a lower movable electrode 15g2 provided below the through hole 15e.

As shown in FIG. 4, the upper movable electrode 15g1 faces the first upper electrode 15p1, the first intermediate electrode 15t1, and the second upper electrode 15q1 of the fixed electrode part 15k. It is possible to move to. Similarly, the lower movable electrode 15g2 faces the first lower electrode 15p2, the second intermediate electrode 15t2, and the second lower electrode 15q2 of the fixed electrode unit 15k to move left and right to form a selective connection.

A stopper pin 15f is fixed to the upper and lower ends of the movable body 15h. The stopper pin 15f is an annular member located on the same axis and is supported by being fitted into the pin receiving groove 15n of the fixed body 15m. The stopper pin 15f in a state of being fitted into the pin receiving groove 15n does not move laterally in a state trapped in the pin receiving groove 15n. That is, it cannot move from side to side. The lateral movement of the moving electrode portion 15d is prevented by the action of the stopper pin 15f, which is safe.

In the state where the stopper pin 15f extends out of the pin receiving groove 15n, the moving electrode part 15d can be moved laterally, that is, left and right.

The cover plate 15b is a plate member having a guide hole 15c in the center thereof, and is coupled to the fixed electrode part 15k with the moving electrode part 15d therebetween. As described above, the cover plate 15b is a part exposed to the outside of the casing 13 of the integrated welder 11.

In addition, the lever (15a) is a dial-type handle is coupled to the elastic separation means through the guide hole (15c).

The elastic separation means includes a male threaded rod 15u, a locking member 15w fixed to the rear end of the male threaded rod 15u, and a spring that is supported by the locking member 15w and surrounds the male threaded rod 15u. It consists of 15v.

The male threaded rod 15u is screwed with the lever 15a after passing through the support hole 15s and the through hole 15e. It is a matter of course that a female threaded ball (not shown) is formed in the lever 15a to be coupled to the male threaded rod 15u.

In addition, the spring (15v) is in contact with the moving body (15h) through the support long hole (15s). That is, one end of the spring 15v is in contact with the moving body 15h and the other end is in contact with the locking member 15w. In addition, the locking member (15w) is supported by the locking jaw (not shown) formed on the inner peripheral surface of the support hole (15s). Reference numeral 15x denotes an inner cover that covers the locking member 15w.

When the lever 15a is turned clockwise while the lever 15a is screwed to the male screw rod 15u exposed to the outside of the through hole 15e, the male screw rod 15u and the locking member 15w assembly spring. Compresses 15v and moves to the lever 15a side. The gap between the lever 15a and the locking member 15w gradually decreases.

When the lever 15a is further rotated, the locking member 15w is finally caught by the support hole 15s and no longer moves, and then the moving electrode portion 15d starts to move. In other words, the moving electrode part 15d is pushed by the lever 15a and is pressed against the fixed body 15m while compressing the spring 15v. At this time, the stopper pin 15f enters the one side pin receiving groove 15n.

When the lever 15a is rotated in the opposite direction, the spring 15v expands, and the moving electrode portion 15d is opened from the fixed electrode portion 15k. The connection is blocked.

Meanwhile, the method of connecting the power lines to the six electrodes may be implemented in two circuit configurations.

In the first method, the torch connecting port 19 is connected to the first intermediate electrode 15t1 and the ground port 17 is connected to the second intermediate electrode 15t2, and the first upper electrode 15p1 and the second lower electrode ( An anode current supply line is connected to 15q2), and a cathode current supply line is connected to the first lower electrode 15p1 and the second upper electrode 15q1.

The positive electrode current supply line or the negative electrode current supply line is a power line for supplying the positive and negative currents after converting the AC power applied from the outside into the integrated welder 11 into direct current. These anode current supply lines and cathode current supply lines are the same as those provided in ordinary welding machines.

In the second method, the first upper electrode 15p1 and the second lower electrode 15q2 are connected to the torch connection port 19, and the first lower electrode 15p2 and the second upper electrode 15q1 are grounded. And a cathode current supply line to the first intermediate electrode 15t1 and a cathode current supply line to the second intermediate electrode 15t2.

The first or second approach is determined by the user.

5A and 5B are diagrams for explaining the operation of the electrode converter 15. The following description is based on the premise that each electrode is connected in the first manner.

Referring to FIG. 5A, the upper movable electrode 15g1 includes the first intermediate electrode 15t1 and the second upper electrode 15q1, and the lower movable electrode 15g2 includes the second intermediate electrode 15t2 and the second lower electrode. It turns out that (15q2) is connected.

In this state, a negative current is applied to the first intermediate electrode 15t1 and a positive current is applied to the second intermediate electrode 15t2. The negative current is supplied to the torch connection port 19 and the positive current is supplied to the ground port 17. It is suitable for TIG welding. At this time, the + part is turned on in the display unit 21, and the − part is lit in the display unit 23.

If the output electrode is to be switched in this state, the lever 15a is released counterclockwise to move the lever 15a to the left in the drawing in a state in which the stopper pin 15f is released from the pin receiving groove 15n. Let's do it.

The lever 15a is moved as described above, and as shown in FIG. 5B, the upper movable electrode 15g1 serves as the first upper electrode 15p1 and the first intermediate electrode 15t1, and the lower movable electrode 15g2 as the first movable electrode 15g1. If the first lower electrode 15p2 and the second intermediate electrode 15t2 are connected, a negative current is applied to the torch connection port 19 and a positive current is applied to the ground port 17 at this time. It is converted into a state capable of MIG welding or CO2 welding.

When the circuit configuration of the second method described above is achieved, it operates as follows.

As shown in FIG. 5A, the first intermediate electrode 15t1 and the second upper electrode 15q1 are used as the upper movable electrode 15g1, and the second intermediate electrode 15t2 and the second lower portion are used as the lower movable electrode 15g2. When the electrode 15q2 is connected, a positive current is applied to the ground port 17 through the second upper electrode 15q1, and a negative current is supplied to the torch connection port 19 via the second lower electrode 15q2. . The circuit configuration suitable for TIG welding is made.

In this state, when the moving electrode unit 15d is operated to switch to the state shown in FIG. 5B, a positive current flows through the first upper electrode 15p1 to the torch connection port 19, and a negative current is applied to the first lower portion. It is applied to the ground port 17 via the electrode 15p2. This circuit configuration can be used for MIG welding or CO2 welding.

As a result, as described above, the electrode conversion device 15 according to the present embodiment can be configured to switch the polarity of the output current with a simple operation, and thus it is convenient to use.

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to FIGS. 6 and 7.

Basically, the welding torch head cooling and welding fume treatment apparatus according to the present embodiment is for cooling the welding torch head used in connection with a welding power supply.

Since the welding torch head is heated to a very high temperature during a welding operation, cooling is important. In this embodiment, cooling is performed by causing air to flow around the welding torch head.

In other words, the air is bound to the welding torch head through the air cable tied to the welding cable to cool the torch head, or by inhaling air remaining around the welding torch head to induce new air to surround the torch head. It is to plan.

In particular, the welding fumes generated near the welding head during the intake of air can be inhaled and treated to provide the effect of two-season tanks. For reference, the welding fume includes heavy metals as toxic gases generated during welding, and when accumulated in the body, cancer may cause various diseases as well.

As shown, the welding torch head cooling and welding fume processing apparatus according to the present embodiment is installed inside the casing 13 of the welding power supply device 11. The welding power supply 11 takes the form of a box and has a control panel 15 on one side thereof, and serves to output power or control signals required for welding.

The control panel 15 is provided with an air connector 17 to which an air cable (not shown) is connected, a control unit 43, and a switching switch 19. The air cable connected to the air connector 17 is a cable having an air passage therein, and is fixed at an end thereof toward the welding torch.

Therefore, for example, when the air is discharged through the air connector 17, the discharged air passes through the air cable in the longitudinal direction to reach a welding torch (not shown). The air reaching the welding torch is discharged from the end of the air cable and cools the welding torch.

In addition, when the vacuum pressure is provided through the air connector 17 inside the casing 13, air around the welding torch flows into the end of the air cable and is drawn into the air connector 17. In particular, the welding fumes around the welding torch generated during welding are also taken in.

The controller 43 is a controller for controlling the air pump 33 and the valve 23 to be described later, and outputs a control signal according to the operation of the changeover switch 19. It is possible to control the operation of the valve 23 and the air pump 33 through the switch 19.

In any case, the cooling and welding fume treatment apparatus according to the present embodiment, the air pump 33 is installed in the inner space 21 of the casing 13 and operated by electric power applied from the outside, and the air pump 33 And a valve 23 having first, second, second, third, fourth and

fifth ports

23a, 23b, 23c, 23d and 23e, and the fifth port 23e of the valve 23 to the air connector 17. A first intermediate tube (29) and a second intermediate tube (35) for connecting the first tube (23a) and the second port (23b) to the inlet and outlet of the air pump (33), respectively. A tube 31, an external air intake tube 25 that guides air outside the power supply 11 to the third port 23c, and is connected to the fourth port 23d and through the fourth port 23d. And a discharge tube 27 for discharging the discharged fluid into the atmosphere.

The air pump 33 has an inlet and an outlet as is a normal air pump. In the following description, the inlet is a passage through which air to be pumped comes in, and the outlet is a passage through which pumped air is discharged.

The air pump 33 operates in accordance with the control signal of the control unit 43 while being fixed to the bottom 37 of the casing 13 and pumps the fluid. The object to which the air pump is punctured is cooling air to be intaken from the outside of the casing 13 and provided to the welding torch, or a contaminated gas including the welding fume sucked from the welding torch.

In addition, the valve 23 is an electromagnetic valve fixed to the wall of the casing 13 and is connected to the air pump 33 through the first and second

intermediate tubes

29 and 31.

As shown, the valve 23 has a first port 23a and a second port 23b on one side thereof, and a third port 23c, a fourth port 23d, and a fifth port on opposite sides thereof. 23e is provided. Each port is connected by a flow path provided inside the valve 23.

Specifically, the first port 23a may be selectively connected to the third port 23c or the fifth port 23e. In addition, the second port 23b can be connected to the fifth port 23e or the fourth port 23d. In this description, the term "connecting" means communicating. This means that a passage through which the fluid can pass is created.

In particular, when the first port 23a is connected to the third port 23c, the second port 23b is connected to the fifth port 23e. At this time, the fourth port 23d is blocked.

When the first port 23a is connected to the fifth port 23e, the second port 23b is connected to the fourth port 23d and the third port 23c is blocked.

Such a selective connection and disconnection operation of the flow path is implemented by the changeover switch 19 as a basic function of a normal valve. As the valve, a solenoid valve or a similar manual valve may be applied.

The changeover switch 19 can implement three modes of operation. For example, a discharge mode for discharging cooling air through the air connector 17, a stop mode for stopping the air pump 33, and an intake mode for drawing external air to the outside of the casing 13 through the air connector 17 to be.

First, when the changeover switch 19 is placed in the discharge mode, the control unit 43 operates the air pump 33 and sends a control signal to the valve 23, thereby providing the first port 23a and the third port. The port 23c, the second port 23b and the fifth port 23e are connected.

As the flow path pattern is implemented, air outside the casing 13 flows into the casing 13 through the outside air inlet tube 25. The air introduced through the external air inlet tube 25 passes through the first port 23a through the third port 23c and the internal flow path (not shown) of the valve, and then through the first intermediate tube 29, the air pump. It is sucked into the entrance of (33).

The air pumped through the air pump 33 is discharged through an outlet of the air pump, and the second intermediate tube 31, the second port 23b, the fifth port 23e, and the connection tube 35 are provided. Passed through in order to be discharged through the air connector (17). At this time, the fourth port 23d is blocked so that the pumping air does not fall into the discharge tube 27.

In any case, the air discharged through the air connector 17 passes through the air cable holding the air connector 17 to reach the welding torch head, and then cools the welding torch head and is dispersed into the atmosphere.

When the changeover switch 19 is placed in the stop mode, the control unit 43 stops the air pump 33 to stop the operation for cooling. When the welding operation is not performed, the changeover switch 19 can be placed in the stop mode to save electrical energy.

When the selector switch 19 is turned to the intake mode, the control unit 43 starts the air pump 33 again, and at the same time, the first port 23a, the fifth port 23e, and the second port 23b. And the fourth port 23d are connected. At the same time, the third port 23c is blocked.

As a result, the air outside the air connector 17 passes through the connecting tube 35, the fifth port 23e, and the first port 23a, and enters the inlet of the pump via the first intermediate tube 29. Air entering the inlet of the pump passes through the second port (23b) and the second port (23b) and the fourth port (23d) is discharged to the outside through the discharge tube (27). Air or welding fumes around the end of the air cable to suck the exhaust through the discharge tube (27).

7 is a view showing the dust removal filter 39 and the inlet air filter 41 included in the welding torch head cooling and welding fume treatment apparatus.

The inlet air filter 41 is a filter fixed to the end of the outside air inlet tube 25, and serves to filter the impurities by passing the air flowing into the inlet air filter 41. As the intake air filter 41, a sponge having a noise function, or the like may be applied.

In addition, the dust removal filter 39 serves to purify the gas discharged through the discharge tube 27, that is, the gas containing the welding fume or dust. The dust removal filter 39 has a two-stage structure.

One end is a filter applying a common sponge, and the second step is a filter having a structure in which a hollow pole of alumina ceramic is formed by anodizing an aluminum foaming agent. The filter using the alumina ceramic hollow pole of this type can be used again by washing again with water after a certain period of use.

Eventually, by applying the dust removal filter 39, it is possible to purify the toxic gas sucked from the welding torch and then discharged.

On the other hand, the welding torch head cooling and welding fume treatment apparatus according to the present embodiment can be simplified when the air pump 33 is applied in a bidirectional manner. The bidirectional method is to reverse the intake and discharge directions of the air pump 33 by the operation of the control unit 43. For example, the air is discharged through the intake port, and the air is taken in through the discharge port.

As such, if the bidirectional air pump is applied, the valve 23 may be equipped with only the outside air inlet tube 23, the discharge tube 27, and the connection tube 35. In some cases, the external air inlet tube 23 and the discharge tube 27 may also be used as one without dividing. However, considering the inherent functions of the inlet air filter 41 and the dust removal filter 39, it is preferable to apply the air intake tube 23 and the discharge tube 27 separately.

In this configuration, in order to supply cooling air to the torch head side, the air pump inhales the outside air through the outdoor air inlet tube 25 and discharges the air through the air connector 17. Move to the head side to perform cooling.

On the contrary, if the fume gas is to be inhaled and removed, the rotor in the air pump is reversely rotated through the control unit 43 to allow the air pump 33 to inhale the fume gas on the torch head side.

The fume gas taken in from the torch head side passes through the valve 23 through the connection tube 35 through the air connector 17 and then exits through the discharge tube 27. At this time, of course, the dust removal filter 39 is purified.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

Claims

It is installed in the integrated welding machine 11 provided with the ground port 17 and the torch connection port 19, and to switch the polarity of the current output through the ground port 17 and the torch connection port 19,

A fixed body having a plurality of electrodes connected to the ground port 17 and the torch connection port 19;

A switching electrode part disposed corresponding to the fixed body and selectively connecting the electrodes to switch the polarity of the current output to the ground port and the torch connection port;

And a switching means for switching the position of the switching electrode part to form a selective connection, and a portable welding power supply having a welding torch head cooling and welding fume treatment device.
The method of claim 1,

The fixed body is;

The first upper electrode 15p1, the first intermediate electrode 15t1, the second upper electrode 15q1, and the first upper electrode 15p1, the first intermediate electrode 15t1, which are arranged to be spaced apart from each other, form a set. And a fixed electrode part 15k spaced apart from the second upper electrode 15q and having a set first lower electrode 15p2, a second intermediate electrode 15t2, and a second lower electrode 15q2. Portable welding power supply having an electrode conversion device and welding torch head cooling and welding fume treatment device.
The method of claim 2,

The switching electrode unit;

Opposed to the fixed electrode portion 15k and installed to be movable in position, the first upper electrode 15p1, the first intermediate electrode 15t1, the first lower electrode 15p2, and the second intermediate electrode 15t2 are simultaneously disposed. Or a moving electrode portion 15d for simultaneously connecting the second upper electrode 15q1 and the first intermediate electrode 15t1, and simultaneously connecting the second lower electrode 15q2 and the second intermediate electrode 15t2. Portable welding power supply having an electrode conversion device and welding torch head cooling and welding fume treatment device.
The method of claim 3, wherein

The first intermediate electrode 15t1 is connected to the torch connection port 19, and the second intermediate electrode 15t2 is connected to the ground port 17.

An anode current is input to the first upper electrode 15p1 and the second lower electrode 15q2, and a cathode current is input to the first lower electrode 15p2 and the second upper electrode 15q1. Portable welding power supply with torch head cooling and welding fume processing system.
The method of claim 3, wherein

An anode current is input to the first intermediate electrode 15t1 and a cathode current is input to the second intermediate electrode 15t2.

The first upper electrode 15p1 and the second lower electrode 15q2 are connected to the torch connection port 19, and the ground port 17 is connected to the first lower electrode 15p2 and the second upper electrode 15q1. Portable welding power supply having an electrode conversion device and the welding torch head cooling and welding fume processing apparatus.
The method according to any one of claims 1 to 5,

The fixed electrode part 15k has a through-hole supporting hole 15s extending in the horizontal direction.

The moving electrode portion 15d is provided with a through hole 15e corresponding to the support hole 15s in a state where the moving body 15h is aligned with the fixed electrode portion 15k.

The operation means,

A supporter extending in the longitudinal direction to penetrate the support hole 15s and the through hole 15e,

A catching member 15w fixed to one end of the supporter and preventing the supporter from being separated from the support hole 15s;

And a lever (15a) for engaging with the supporter passing through the through hole (15e) and for manipulating the position of the movable electrode portion (15d). Portable welding power supply.
The method of claim 3, wherein

Stopper pins 15f are fixed to upper and lower ends of the movable electrode part 15d,

In the fixed electrode portion 15k, a pin receiving groove for accommodating the stopper pin 15f while the movable electrode portion 15d is connected to the fixed electrode portion 15k to prevent the movement of the movable electrode portion 15d is provided. 15. A portable welding power supply having an electrode converter and a welding torch head cooling and welding fume treatment device, characterized in that 15n is formed.
By selectively controlling the intake and exhaust to cool the head of the welding torch and remove the fume, it is installed in the welding power supply having an air connector and a control unit to which the air cable is connected, and discharges air through the air connector. Or to intake,

An air pump operated by the control unit;

A valve which is connected to the air pump and allows the cooling air to be supplied to the welding torch side when the air pump is operated, or passes the fume gas sucked in the vicinity of the welding torch therein;

An inlet air filter connected to the valve and filtering air supplied to the welding torch through the valve when the air pump is operated;

Electrode conversion device and welding torch head cooling and welding fume processing apparatus is connected to the valve, characterized in that the air intake at the welding torch side of the operation of the air pump includes a dust removal filter for passing and filtering the gas passing through the valve. One portable welding power supply.
The method of claim 8,

The valve;

First and second ports are located at one side, and third, fourth and fifth ports are located at the opposite side, and have two internal flow paths switched by the controller.

First and second intermediate tubes are connected to the first port and the second port, respectively, to communicate with the inlet and the outlet of the air pump,

A portable welding power supply having an electrode converter and a welding torch head cooling and welding fume treatment device, characterized in that the connecting tube is connected between the fifth port and the air connector.
The method of claim 8,

The valve;

It is provided with an external air inlet tube for inducing air passing through the inlet air filter, a discharge tube for receiving gas taken in from the torch head and leading it to the dust removal filter side, and a connection tube connected to the air connector.

The air pump,

A portable welding power supply having an electrode converter and a welding torch head cooling and welding fume processing device, characterized in that the pump is a method of switching the intake and discharge direction by the control unit.