Device and method of cleaning welding torch

FIELD: process engineering.

SUBSTANCE: cleaning device 1 comprises, at least, two coils 4, 11 and opening 3 for mounting torch 5, power supply 7 connected with said coils and, if required, with device to apply washing fluid on torch point 5. All components are arranged common case 2 and controlled one control device 8. To up the cleaning quality and increase cleaning zone, coils may be fed independently by said power supply. Cooler 14 is used to cooling coils 4, 11.

EFFECT: higher quality of gas cleaning.

13 cl, 3 dwg

 

The invention relates to a cleaning device for cleaning welding torches with at least two coils and a hole for mounting the welding torch for electromagnetic treatment, the energy supply device connected to the coils, and, if necessary, with a device for supplying liquid detergent to the edge, in particular to the gas nozzle of the welding torch, preferably all components are located in a common housing and are controlled by one control device.

Further, the invention relates to a method for cleaning welding torches, in which the contact-free removal of dirt from the handpiece, in particular a gas nozzle of the welding torch, applied electromagnetic field generated by the at least two coils, and just before cleaning the tip of the welding torch is applied to a liquid detergent or wetting liquid.

The welding torch in the welding process are contaminated by splashes of molten material. This spatter deposited inside of the gas nozzle of the welding torch and freezes there. The result is a violation of the flow of protective gas through the gas nozzle of the accumulated metal spray, so in place of welding can enter the air, which may have a negative ska is Atsa on the welding process or degrade the quality of the weld. In this regard, for the formation of a high quality weld areas important working perfectly and cleaner welding torch.

For this reason, welding torches at regular intervals cleaned from the metal spray. However, during the cleaning of the welding torch may not be used in the work. Because of this tend to be cleaned as soon as possible. There are mechanical methods for cleaning welding torches, at which deposits in the handpiece, in particular a gas nozzle of the welding torch, are removed using brushes, knives or similar elements. However, such mechanical cleaning methods are limited opportunities for a good cleaning of the inner part of the gas nozzle of the welding torch. In addition, due to mechanical impact causes damage to parts of the welding torch and reduces their service life. Due to damage on the surface of the parts of the welding torch increases the grip of the welding torch with the spray, so the result is more rapid elimination of the gas nozzle from the work and thus need more often to clean it or replace the gas nozzle. Next, the welding torch must be cooled before cleaning process, which again increase the characteristic time of treatment.

US 4838287 And describes, for example, the method of non-contact cleaning welding torches when applying coil through which an electric current. To this end, the tip of the welding torch is inserted into the hole of the coil and put the corresponding current pulse. Emerging electromagnetic field causes the corresponding magnetic forces that affect the deposition on the welding torch and the way to remove them. When this removal is carried out without mechanical action on the part of the welding torch, and it occurs sparingly and thus may increase its service life.

So on the one hand to cool the welding torch in front of the electromagnetic clearance and with the other hand to facilitate the removal of dirt by using the appropriate tools for cleaning typically the welding gun is immersed in the liquid. This fluid may consist of water or of a mixture of water with certain solvents. For effective cleaning electromagnetic preferably, if the metal spray welding torch cooled quickly when immersed in detergent. This rapid cooling due to the different thermal expansion of the metal spray and usually consisting of copper gas nozzle reduces the adhesion of metal spatter from welding is offered by the burner.

Device for cleaning welding torches, has a bath with a liquid for immersion welding torch and coil for electromagnetic cleaning welding torches, described, for example, in WO 2001/56730 A2. This bath liquid and hour containing the coil located at the side to be welded part, so that the welding torch, which, in particular, is mounted on the robot arm, can be purified also automatically between welding processes. This has the disadvantage that in reception, for example, is not provided for the devices that supply the coil current, so they must be connected using suitable cables. Through these wires between the device power supply and the cleaning unit can be transmitted electromagnetic fields generated by high current pulses that may cause interference with other devices or control devices.

Further, from EP 1558420 known cleaning device for contactless cleaning welding torches with the magnetic field in which the coil for magnetic filtration and tank for washing fluid are located in the same housing, with the welding torch through the hole in the housing can be installed in the coil. In case there is a power supply, so power to the coil through may cordierite. The device for applying liquid detergent and coil together with located under the coil capacity for receiving purified by electromagnetic means contaminants are located in the housing. Further, owing to such arrangement, the application of liquid detergent and electromagnetic cleaning of the gas nozzle can be carried out basically in the same position.

From WO 2005/97362 it is well known cleaning device for welding torches with a device for electromagnetic cleaning welding torches, which has a coil with a hole for mounting the welding torch for electromagnetic treatment and a device for applying liquid detergent liquid on the tip, in particular on the gas nozzle of the welding torch, which are located in a common housing. In the General case additionally has a second device for cleaning welding torches, which uses a cooling medium, in particular CO2- dry ice. In the General case there is a common control device, the total supply and discharge device, and the total device power supply or power source for the control, regulation and energy supply device for cleaning.

Device for electromagnetic cleaning welding torches subject species is known from JP 1078679.

The objective of this izaberete the Oia is to create a device and method for cleaning welding torches, moreover, the quality of treatment can be increased, and the area is cleaned up can be expanded.

The objective of the invention is solved by the fact that when cleaning welding torches coil can be supplied with electric power from the device power supply independently from each other, and there is a cooling device for cooling coils. While it is preferable that creates at least two consecutive magnetic field, which merge into a common magnetic field. Thus, over a longer period of time creates an electromagnetic field which thanks to the use of at least two coils extends over a large area, resulting creates a large area cleaning welding torches. In known hitherto from the prior art magnetic devices for cleaning with only one coil due to the small applied field of force is necessary when cleaning to move the device in two different positions. This leads on the one hand to the increased costs of programming used more often for welding robot and on the other hand that always cleared only part of the burner. Due to the greater useful areas of the treatment with the application of the at least two coils can be cleaned in the interior of the welding torch with only one position is AI. The cleaning efficiency due to this, at least, doubles, start-up, adjustment and programming is simplified and the possibility of error is reduced to a minimum.

Thanks to the device for cooling coils heat generated during the cleaning process due to the magnetic field, can be discharged from the coils and thus it becomes possible to more long-term work of the cleaning device.

Preferably the coil at intermediate turning on the switching element connected to one or more capacitors in the power supply. Due to this coil can take a shorter time to be supplied with power and thus the rapid creation of a magnetic field.

Preferably, the capacitors are connected directly to the output is protected against short circuits of the transformer. This can create simple and economical design for charging the capacitor and at the same time galvanic isolation.

The cooling device may be located between the coils.

If the cooling device is integrated into at least one coil, can be achieved with better heat dissipation and cooling of the coils and thus preventing the accumulation of heat inside the coils.

Device for ohlord the deposits can be formed by directing cooling plates or heat pipes, in particular, the so-called fire tubes, which are connected with the case. Due to this heat can be transmitted to the housing, which preferably has good thermal conductivity, and thus applies a large surface for heat dissipation.

If at least one coil is equipped with at least one temperature sensor, can be controlled by changing the temperature in the coils. As a result, may take appropriate measures so that you can prevent harm from too high of temperature rise.

To avoid violations of other devices in the environment of the cleaning device, a body largely made closed using a protective screen against electromagnetic fields generated by the coils.

Execution, in which case without forced cooling and the cooling holes and has a seal so that the inner part of the body is protected from contamination, has the advantage that it may be prevented violations, which often are caused by penetrating dirt.

If the coils have additional magnetic guiding plates, the magnetic field can point concentrated to grow, because this particular area is achieved by increasing the magnetic field and the mayor enables improved cleaning of the welding torch. Additionally, this kind of magnetic guides shields can be used to equalize the magnetic field in a larger area and thus create a uniform field to create in all areas equally good cleaning.

The invention in part of the method is solved by the fact that the first coil to create an electromagnetic field is supplied with electric power after at least another coil. By varying the time between applying energy to at least another and to the first coil of the electromagnetic field may vary in space and time. This allows optimum adaptation to the geometry and the magnetic shielding conditions of the welding torch. A significant advantage also lies in the fact that thanks to the use of at least two separate coils of the winding can get shorter. This leads to a higher magnetic flux density and consequently a higher force on pollution in the welding torch. Due to the fact that the resulting at least two magnetic field coils in a longer period of time remains at a high level, can better overcome the shielding action of commonly used copper gas nozzle, which leads to higher purifier is th effect inside the welding torch.

Preferably, the first coil is supplied with electric power, while the supply of electric energy, at least another coil remains in force.

Preferably, the first coil is supplied with electric power by 1-3 MS, in particular 1.5 MS after at least another coil. This achieves that was created by the coils of the magnetic field merge into the General magnetic field and as a result increases the area is cleaned up.

The present invention is explained in more detail using the attached, schematic drawings, which show:

figure 1 - simplified schematic illustration of the cleaning device in the future;

figure 2 - schematic illustration of the cleaning device with all major components, side view; and

figure 3 is a simplified depiction of the magnetic field generated in the cleaning process.

Figure 1-3 shows the cleaning device 1, comprising a housing 2, which are all necessary to the cleaning device components. It should be noted that depicted in figure 2, the individual components are connected to each other, and for the sake of argument drawn only one line or wire.

In the case 2 has a hole 3 in communication with the coil 4, so that the through hole 3 of the welding torch 5, in which lastnosti the tip or the gas nozzle 6 of the welding torch 5, can be installed in the coil 4, and then may be electromagnetic purification. With the coil 4 are connected to the device 7, the power supply, which is to configure is connected to the control device 8. Of course, the device 7 of the power supply and the control device 8 can form a common structural unit. Additionally, the cleaning device 1 may be equipped with a device for applying cleaning liquid funds or wetting fluid. For this purpose, the housing 2 is provided bath 9 for washing liquid means (not illustrated), which can dive the welding torch 5. Next to the bath 9 can be, for example, in the receiving device 10, the capacity to fill, through which the tub 9 is supplied with wash liquid medium. Of course, the capacity to fill may also be located inside the housing 2 and the washing liquid pump is transported into the tub 9, or on the housing 2 is connected, through which the tub 9 externally supplied liquid detergent solution.

As follows from figure 2, a second coil 11 connected to the first coil 4. Both coils 4, 11 independently of one another from the device 7 to provide electrical energy. For example, each coil 4, 11 shall be of such dimensions that the coils of wire with a cross section of 5 mm2have on Amer 80 mm, a height of 40 mm and 120. Both coils 4, 11 are arranged coaxially one above the other. The shape of the coils 4, 11 may be round or cylindrical and may be formed by a coil with an air core. It must be ensured that the welding torch 5, in particular the gas nozzle 6, could be positioned in the center of the coils 4, 11, so that when the supply of electric power to the coils 4, 11 created magnetic field could affect the welding torch 5.

To supply the coils 4, 11 energy, both coils 4, 11 is connected to the device 7, the power supply, and each coil 4, 11 at intermediate turning on a switching element (not shown) connected to at least one, in particular, with three capacitors 12. Thus, by activating the switching element energy in the capacitors 12, is fed to the coils 4, 11. Thus, the capacitor 12 can be charged, they are directly attached to protected from short circuits the transformer 13, so that when the voltage is applied to the primary side of the transformer 13 is transmitted to the secondary side and then served for charging the capacitor 12 directly to the capacitor 12. Thus, using the transformer 13 can be carried out to convert the energy from the primary side to the secondary side, which is achieved Opti the actual charging of the capacitors 12 and at the same time galvanic isolation. While it is preferable for the coil 4, 11 is applied from two to five capacitors 12, in particular three of the condenser 12, and each capacitor 12, for example, has a capacity of 4700 f and as a voltage selected 500 C. of Course, both coils 4, 11 can have different sizes.

Instead of capacitors 12 can have a direct provision of the coils 4, 11 electric energy, and for this there is the provision of power to the coils 4, 11 from the clocked power supply, in particular the inverted current source.

Preferably for cleaning electrical energy is supplied to the second coil 11 located against the holes 3. Thus, the magnetic field may extend from the second coil 11 in the direction of the holes 3, i.e. to the first coil 4, wherein both coils can be served in various capacity. For example, the selected ratio of 60:40, 70:30 or 30: 70, 40:60. For the best cleaning you can equip the coils 4, 11 additional magnetic guide plates (not shown)to the magnetic field of a point concentrated strengthen and to equalize the magnetic field in a larger area and thus to achieve a homogeneous field.

Further, it is preferable to provide for the coils 4, 11 in the housing 2 of the cooling device 14, as between the two coils 4, 11 when applying the CN is rgii the accumulation of heat, which must be removed to prevent damage to the coils 4, 11. The cooling device 14 can be in its simplest form, is formed corresponding to most of the guide plates 15, so that the heat between the coils 4, 11 gets most of the guide plates and is discharged from the heat source. Cooling the guide plates 15 and preferably are coupled to the body 2, so that the heat can be dissipated to the housing 2, as is schematically depicted in figure 2. The cooling unit 14 may also be integrated directly into one or both of the coils 4, 11. The heat outside is important because due to the large electromagnetic fields of the body 2 is closed on the outside to shield and any dirt cannot get inside of the housing 2. Due to the efficient heat dissipation through the housing, there is no need to install fans and similar devices that must be installed in the slots of the housing 2. Thus, the case 2 can do without forced cooling and the cooling holes and still be protected from outside contamination. Similarly, it would be as a cooling device 14 to apply the so-called flame tubes that can be placed between the coils 4, 11 or nakativaetsa with the coils 4, 11. The free end of the heating pipe is connected with the housing 2 when this heat through the heating pipe is routed to the chassis 2. In addition, the cooling unit 14 may also be formed with a compressed air system, and on the housing 2 must be provided for the connection of compressed air. The coils 4, 11 can also be cooled liquid or gaseous environment.

At least one coil 4, 11 can be equipped with at least one temperature sensor, which may be subject to discharge power. Using at least one temperature sensor can be controlled dynamics of temperature and, for example, you can have an impact on the dynamics of the temperature using the summed power or energy. For example, the coils 4, 11 at too high a temperature during the next cleaning process can be made less power, so will have a lower growth temperature. Further, temperature sensors can also be used in cooling, and preferably the use of active cooling, i.e. controlled cooling unit 14, as, for example, cooling the compressed air. Thus, accordingly to the dynamics of the temperature may increase or decrease the capacity of the cooling unit 14, so that it will always be the optimum temperature. That is, the cooling is adjusted or turned on and off, so that the cooling is carried out only what about then when it is necessary.

Significant is the fact that the application of the two coils 4, 11 adjusting the coils 4, 11, respectively, is controlled by the control device 8. Preferably when cleaning of the welding torch 5 providing power to both coils 4, 11 one after the other, i.e. when the energy supply to the other coil 11 to generate a magnetic field 17 at a given point in time to generate a magnetic field of 16 electrical energy is supplied to the first coil 4, where, however, the other coil 11 after activation of the first coil 4 is also supplied with energy. Thus is achieved that both the magnetic field 16, 17 of the two coils 4, 11 merge into the General magnetic field. This is schematically shown in figure 3, and the ordinate T pending magnetic field and on the abscissa 1 deferred length or distance along the axis along the coils 4, 11. Preferably, the first coil 4 is supplied with energy from 1 to 3 MS, in particular 1.5 MS after the power supply to the other coil 11.

Usually the magnetic field 16, 17 are formed only in a certain area of the coils 4, 11, so that when only one coil 4, as is known from the prior art, only in this area there is a strong magnetic field and only in this area is reached by a good cleaning. So in cleaning the device known from the prior art, to get a good cleaning, welding g is relka 5 must be inserted at different depths in the coil 4, so around the gas nozzle 6 there would have been a good cleaning effect.

When using two coils 4, 11 now formed two different field or magnetic field 16, 17, which, however, due to short distances and temporary total supply of energy merge into the General magnetic field. When the area is cleaned up considerably increases as the magnetic field acts on a larger area. Thus, the welding torch 5, in particular the gas nozzle 6 can be completely cleaned in the cleaning process and no longer need, as it is known in the prior art to install it in the coil 4 at different depths.

Further, the coil 4, 11 can extend through the respective switching elements with additional coils, so that the control device 8, if necessary, appropriate switching elements can be configured, so that may increase the number of turns of the coils 4, 11 or by using the deactivate switching elements number of turns of the coils 4, 11 can be reduced. Thus, it may be the adjustment of the magnetic field for different welding torches 5 or to influence the formation of the magnetic field.

1. The cleaning device (1) for cleaning welding torches (5), at least two coils (4, 11) and the opening (3) for welding installation mount the key (5) for electromagnetic treatment, device (7) power supply connected to the coils (4, 11), with the device for applying cleaning liquid to the tip of the welding torch (5), preferably all components are located in a common housing (2) and regulated from the device (8) control, characterized in that the cleaning of the welding torch (5) coil (4, 11) independently of one another can be supplied with electrical energy from the device (7) energy and provides a cooling device (14) for cooling coils (4, 11).

2. The device according to claim 1, characterized in that the coils (4, 11) at intermediate turning on the switching element connected to one or more capacitors (12) of the device (7) of the energy supply.

3. The device according to claim 2, characterized in that the capacitor (12) connected directly to the output is protected against short circuits of the transformer (13).

4. The device according to claim 1, characterized in that the cooling device (14) is installed between the coils (4, 11).

5. The device according to claim 1, characterized in that the cooling device (14) is integrated, at least one coil (4, 11).

6. The device according to claim 1, characterized in that the cooling device (14) is formed by cooling the guide plates (15) or heat pipes, in particular fire pipes connected to the housing (2).

7. The device according to the .1, characterized in that at least one coil (4, 11) equipped with at least one temperature sensor.

8. The device according to claim 1, characterized in that the housing (2) mostly closed for shielding electromagnetic fields (16, 17)generated by the coils (4, 11).

9. The device according to claim 1, characterized in that the housing (2) has no forced cooling and the cooling holes and sealed so that the internal part of the housing (2) protected from contamination.

10. The device according to claim 1, characterized in that the coils (4, 11) have an additional magnetic guiding plates for point concentration, strengthen and, in any case, the homogenization of the magnetic field.

11. The method of cleaning welding torches (5), in which the tip of the welding torch (5) for non-contact removal of contamination is exposed to electromagnetic fields (16), created at least two coils (4, 11), and, if necessary, before cleaning the tip of the welding torch (5) put washing up liquid, characterized in that the first coil (4) to create the electromagnetic field (16) is provided with electric power after at least another coil (11).

12. The cleaning method according to claim 11, characterized in that the first coil (4) supply of electric energy, at the same time, the supply of at least another coil (11) electric is the Nergy continue to support.

13. The method according to claim 11 or 12, characterized in that the first coil (4) is provided with electrical energy from 1 MS to 3 MS, in particular, 1.5 MS after at least another coil (11).



 

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5 cl, 1 dwg, 2 ex

FIELD: reduction of ferric sulfide deposits in pipe lines.

SUBSTANCE: proposed method consists in bringing the inner surfaces of pipe in contact with composition prepared from aqueous solution containing the compounds given in formula (I): , where X is anion whose valence "n" is selected from definite group and at least one amine selected from group including alkyl amines, dialkyl amines, alkylen diamines, cycloalkyl amines or their conjugates with acids. According to another version, use is made of composition containing tris(hydroxymnethyl) phosphine, at least one amine or its conjugate with acid and solvent. In presence of composition, fast complexation takes place; as a result, ferric sulfide deposits are dissolved and are removed from pipe.

EFFECT: possibility of using safe, available and inexpensive materials ensuring deposition of polymers.

72 cl, 1 tbl

FIELD: petroleum processing industry, in particular, cleaning of petroleum and petroleum product transportation pipelines and separation of media.

SUBSTANCE: composition contains polyacrylamide, petroleum product, mineral acid salt, linking agent, powdered formaldehyde derivative, and sweet water.

EFFECT: increased efficiency in pressurizing cavity of pipeline having various diameter and steep turnings during cleaning thereof and separating of media.

5 cl, 1 tbl

The invention relates to the field of concentration of solutions by ultrafiltration, reverse osmosis and can be used in food, chemical, pharmaceutical and other industries

FIELD: process engineering.

SUBSTANCE: invention relates to laser processing of materials for use in machine building and instrument making for cleaning surfaces of dirt and undesirable layers, producing preset surface properties for structural materials, and to devices used to this end. Processed surface us subjected to scanning beam of intermittent-pulse laser radiation. Laser beam with time structure made up of intermittent concurrent trains of light pulses is formed. Every pulse train is swept into band. Bands formed by scanning each intermittent concurrent pulse train are coupled. Width of processing band equals crosswise size of laser beam on processed surface. Proposed device comprises interconnected laser and opto-mechanical system Laser generates beam with time structure made up of intermittent concurrent trains of light pulses. Said opto-mechanical system is made up of system that forms homogeneous spatial structure of laser beam and scanning system at the output of which focusing lens is arranged. Computer is connected with synchronising unit connected, in its turn, with laser and scanning system.

EFFECT: higher efficiency of cleaning diverse surfaces.

2 cl, 2 dwg

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