CN2507601Y - Cyclone cooling gas shield welding torch - Google Patents

Abstract

Disclosed is the utility model in order to guarantee the stable and reliable operation of a gas shielded welding gun. The temperature of the welding gun must be reduced, thereby heat on a gooseneck transmitted from the electric arc must be sufficiently dissipated into surrounding air. The utility model discloses the goose-neck of the welding gun, which comprises an an internal core pipe (3) equipped with the external spiral wing, wherein the internal pipe is closely wrapped by an external pipe (4). The internal diameter of the internal core (3) is slightly bigger than that of the wire feeding hose (2), wherein most protection gas flowing through the goose-neck passes through the spiral groove among the spiral wings. The cooling effect of the gas is significantly enhanced due to the extended flowing route, the increasing contact area with the metal and the improving heat exchanging capacity of gas which rapidly revolves with strong vortex.

Description

Whirlwind refrigerating gas protection weldering welding gun

The utility model belongs to the welding auxiliary equipment, be mainly used in the gas shielded arc welding consumable electrode automatically and semi-automatic arc weld connect.

Existing gas shielded arc welding welding gun is owing to be subjected to the heat intensive of electric arc, and it is very high that temperature reaches.Not only make the operator be difficult for gripping, and be easy to the cable after handle is bound up on welding gun, comprise that wherein tracheae and control line burn out.Therefore the rising that limits the welding gun temperature is the key that guarantees that welding gun can reliablely and stablely be worked.

Prevent welding gun, particularly too high must the managing of the temperature at handgrip and cable place stops the heat that electric arc is come by the gooseneck biography, and the heat in the gooseneck is dissipated.This all is a heat of taking away gooseneck by carbon dioxide itself by the passage at gooseneck center in the general welding gun.But gooseneck central passage length is shorter, and the cross section is also less, and this cooling effect is very ineffective.The gooseneck that internationally famous Bin Caier welding gun adopts appearance to wear the flute profile groove makes carbon dioxide and the increase of gooseneck contact area improve cooling effect, be the most successful present way, but cooling effect does not still reach desirable degree.In big electric current welding, when arc power was extremely powerful, handgrip and cable felt that still temperature is too high.

The purpose of this utility model is to provide a kind of carbon dioxide cooling effect of giving full play to that handgrip and cable heated are reduced, thereby makes the reliable gas shielded arc welding welding gun of more stable work.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the longitudinal section of the gooseneck of the utility model welding gun.

Fig. 2 is that another implements structure chart.

Fig. 3 is the another kind of structure chart of implementing.

Fig. 4 is another embodiment of Fig. 2.

Fig. 5 is another enforcement structure of gooseneck end among Fig. 1.

Welding wire in Fig. 1 (1) advances along wire convey soft pipe (2).Flexible pipe is inserted in gooseneck inner core tube (3) lining of band external spiral fin, and the outer tube of gooseneck (4) is enclosed within the outside of inner core tube (3).The internal diameter of outer tube (4) almost equates with the external diameter of the external spiral fin of inner core tube (3), so the two overlaps very tightly, and closely contact.Outer tube (4) two ends have end cap (5) to seal.End cap (5) one edge joint cable connectors, an edge joint nozzle and an ignition tip forms gooseneck.The internal diameter of inner core tube (3) only than the diameter of wire convey soft pipe (2) greatly seldom; so behind the protective gas inflow gooseneck cavity from cable; flow through in most of helicla flute, push ahead, discharge up to the other end end caps in giddy mode by helical wing plate.

Fig. 2 is that another of such scheme implemented structure, and is that inner core tube (3) itself is not with the external spiral fin outside Fig. 1 is different.Helical form is fixed on the inner core tube (3) with soldering around the copper wire (6) on the inner core tube (3), forms the helical duct of gas.

Fig. 3 is that the another kind of Fig. 2 is implemented structure, and helical form on the inner core tube (3) is the copper pipe (7) of hollow, and gas had both rotated in the helicla flute outside the copper pipe (7) and advanced like this, rotated in copper pipe (7) abreast again and advanced.

Fig. 4 is another enforcement structure of Fig. 2, and copper wire (6) two sides on inner core tube are tortuous uneven, and therefore the gas that flows in helicla flute also vacillate now to the left, now to the right like this, produces better heat exchange effect.

The key that reaches the gas cooled optimum efficiency is that gas must be most from helicla flute, rather than straight-through from the center.The resistance of central straight passage is increased as far as possible.When the wire convey soft pipe diameter was 4 millimeters, diameter all was 4.1 millimeters on the endoporus total length, can just allow flexible pipe to insert or extracted, and at this moment the cross section of central straight passage is about 0.6 square millimeter.The spiral fluted effective cross-section is 4 to 6 square millimeters, and is big more a lot of than the former.The gas overwhelming majority all can be passed through from helicla flute like this.

In order further to strengthen above-mentioned effect, inner core tube (3) two ends represented as Fig. 5 add silicone rubber sleeve plug (8).The internal diameter of cover plug (8) is slightly smaller than wire convey soft pipe (2).Wire convey soft pipe (2) inserts back cover plug (8) will tightly surround wire convey soft pipe (2), not allow gas pass through between the slit from here.

Straight-through and cross and compare from the gooseneck center with original gas, cooling effect is because three aspects, and strengthened.1) approach of gas flow has extended.2) area of gas and Metal Contact has strengthened.3) giddy gas produces strong eddy current, and the heat-exchange capacity of crossing than leading directly to has improved.

Theoretical calculating shows that under the gooseneck condition in the same same cross section of length, heat-sinking capability can improve 5 to 10 times.Heat-sinking capability improves reduces the welding gun temperature, can reliablely and stablely work when high power load.

Gooseneck also can be made the form of segmentation, and for example one section with common straight-through cooling, and the mode of the whirlwind cooling that another section proposes with this programme is connected together two sections then.

Claims (5)

1. used for gas shield welding welding gun, its gooseneck is cooled off by the gas that flows through wherein, it is characterized in that: the outer tube of gooseneck (4) tightly is enclosed within on the inner core tube (3) of band external spiral fin, and outer tube (4) two ends have end cap (5) to seal; The internal diameter of inner core tube (3) is only greatly very bigger than wire convey soft pipe (2) diameter; The protective gas overwhelming majority is by flowing through in the helicla flute between helical wing plate.

2. according to the said welding gun of claim 1, it is characterized in that helical wing plate on the gooseneck inner core tube (3) be by copper wire (6) with helical form around on inner core tube (3), soldering is lived then.

3. according to the said welding gun of claim 2, it is characterized in that gooseneck is made by the copper pipe that is hollow on inner core tube (3).

4. according to the said welding gun of claim 2, it is characterized in that copper wire (6) two sides on the gooseneck are tortuous uneven.

5. according to the said welding gun of claim 1, inner core tube (3) two ends that common feature is a gooseneck add silicone rubber sleeve plug (8), and the internal diameter of cover plug (8) is slightly smaller than wire convey soft pipe (2).

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