CN2719472Y

CN2719472Y - Air plasma arc cutting torch

Info

Publication number: CN2719472Y
Application number: CN 200420062824
Authority: CN
Inventors: 周国清; 徐康
Original assignee: YUANYANG WELDING-CUTTING EQUIPMENT Co Ltd CHANGZHOU
Current assignee: YUANYANG WELDING-CUTTING EQUIPMENT Co Ltd CHANGZHOU
Priority date: 2004-07-15
Filing date: 2004-07-15
Publication date: 2005-08-24
Anticipated expiration: 2014-07-15

Abstract

The utility model discloses an air plasma arc cutting torch for air plasma arc cutting machines, which is provided with a cutting torch body, a conductive gun core, an insulating sleeve, a copper sleeve, an insulating protective sleeve, an electrode with a hafnium filament, and a nozzle, wherein an air passage communicated with an airflow passage of the cutting torch body is arranged on the conductive gun core. The insulating sleeve is sheathed on the conductive gun core; the copper sleeve is sheathed at the periphery of the insulating sleeve. A spiral airflow passage is arranged in a cavity formed between the insulating sleeve and the conductive gun core; the spiral airflow passage is communicated with an inner cavity of the nozzle and an outlet thereof. The cavity is also communicated with a cooling passage; an outlet of the cooling passage leads to the periphery of the nozzle. The utility model has the advantages of great cutting thickness, high smooth degree of cutting surfaces, good cutting quality and long service life.

Description

The air plasma arc cutting torch

Technical field

The utility model relates to a kind of cutting torch of Air Plasma Arc Cutting Machine.

Background technology

Existing air plasma arc cutting torch is generally directly guided compressed air the outlet of nozzle into by straight hole or straight trough, and this straight line mode of giving vent to anger makes the cutting torch cutting thickness little, and cut surface fineness is relatively poor, cut quality is relatively poor, and electrode life is short.Chinese patent literature CN2086180U discloses a kind of cutting torch that can produce swirling eddy, in the hope of improving cutting thickness and cut quality.Electrode front end in this structure has some annular airflow grooves, produces swirling eddy with this.Because air-flow makes near jet expansion tangentially, thereby is difficult to form stronger swirling eddy; Also owing to must leave the gap between electrode and nozzle, pour into jet expansion so also have some straight-through air-flows, and these straight-through air-flows have disturbed the rotation of swirling eddy, make the gas energy can not high concentration, cause cutting thickness, cut quality and the life-span of cutting torch all not reach the requirement of expection.

Summary of the invention

The purpose of this utility model is to provide the air plasma arc cutting torch that a kind of cutting thickness is big, cut surface is highly polished and the life-span is long.

In order to achieve the above object, the utility model is by the following technical solutions: a kind of air plasma arc cutting torch, electrode and nozzle with cutting torch body, conduction rifle core, insulation sleeve, copper sheathing, insulation protective jacket, band hafnium filament, has the air flue that communicates with the gas channel of cutting torch body on the conduction rifle core, insulation sleeve is sleeved on the conduction rifle core, copper sheathing is sleeved on the periphery of insulation sleeve, be provided with the spiral air flow passage in the cavity that forms between insulation sleeve and conduction rifle core, the spiral air flow passage communicates with the inner chamber and the outlet thereof of nozzle; Described cavity also communicates with the cooling duct, and the nozzle periphery is led in the cooling duct outlet.

After adopting said structure, owing to be provided with the spiral air flow passage in the cavity that between insulation sleeve and conduction rifle core, forms, the spiral air flow passage communicates with the inner chamber and the outlet thereof of nozzle, so an air-flow part that enters in the cavity that forms between insulation sleeve and the conduction rifle core can enter the spiral air flow passage, after the rotation pressurization is quickened in the spiral air flow passage, can rotate around electrode and advance, with cooling electrode, spiral air flow arrives the inner chamber of nozzle then, through compression once more, air-flow with rotation at a high speed sprays the outlet of plasma arc from nozzle at last, the plasma arc energy height that this rotates is at a high speed concentrated, and is difficult for diffusion, so cutting torch cutting thickness of the present utility model is big, cut surface is highly polished, the cut quality height.Also because another part air-flow in the cavity leads to the nozzle periphery along the cooling duct, nozzle is cooled off rapidly, like this, electrode and nozzle have all obtained sufficient cooling at work, so greatly prolonged the life-span of the present utility model.

Description of drawings

Fig. 1 is the structural representation of air plasma arc cutting torch of the present utility model;

Fig. 2 is the structural representation of conduction rifle core in the utility model;

Fig. 3 is the structural representation of insulation sleeve in the utility model;

Fig. 4 is the structural representation of copper sheathing in the utility model;

Fig. 5 is the structural representation of second embodiment of the utility model;

Fig. 6 is the structural representation of the 3rd embodiment of the utility model.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing is described in further detail the utility model.

As shown in Figure 1, air plasma arc cutting torch of the present utility model, electrode 10 and nozzle 9 with cutting torch body 1, conduction rifle core 4, insulation sleeve 5, copper sheathing 6, insulation protective jacket 7, band hafnium filament 10-1, has the air flue 4-1 that communicates with the gas channel 2 of cutting torch body 1 on the conduction rifle core 4, insulation sleeve 5 is sleeved on the conduction rifle core 4, copper sheathing 6 is sleeved on the periphery of insulation sleeve 5, be provided with spiral air flow passage 12 in the cavity 13 that forms between insulation sleeve 5 and conduction rifle core 4, spiral air flow passage 12 communicates with the inner chamber 9-1 and the outlet 9-2 thereof of nozzle 9; Described cavity 13 also communicates with cooling duct 14, and nozzle 9 peripheries are led in cooling duct 14 outlets.

As shown in Figure 1, 2, described spiral air flow passage 12 is that screw thread 4-2 by the 4 periphery settings of conduction rifle core assembles and forms with insulation sleeve 5 endoporus.Certainly, described spiral air flow passage 12 also can be that screw thread by insulation sleeve 5 inwall settings is with the 4 peripheries assembling of conduction rifle core and form.

As shown in Figure 2, screw thread 4-2 can be an one start screw, also can be multiple thread.

Shown in Fig. 1,3,4, cooling duct 14 comprises that the cavity 11 that forms between inclined hole 5-1 on the insulation sleeve 5, copper sheathing 6 and the insulation sleeve 5, the through hole 6-1 and the insulation protective jacket 7 of copper sheathing 6 front portions are looped around copper sheathing 6 and the formed outlet 15 of nozzle 9 peripheries.

As shown in Figure 5, in second embodiment of the present utility model, also be provided with intake tunnel 18 and exhalant canal 17 on the cutting torch body 1, be provided with water guide core 16 in the endoporus of conduction rifle core 4 and electrode 10, water guide core 16 two ends communicate with intake tunnel 18 and exhalant canal 17 respectively.In addition, the endoporus of conduction rifle core 4 should be departed from the position of the air flue 4-1 that communicates with gas channel 2 in the cutting torch body 1 on the conduction rifle core 4.All the other structures are identical with above-mentioned first embodiment.This structure has strengthened the water cooling function.

As shown in Figure 6; in the 3rd embodiment of the present utility model; between electrode 10 and copper sheathing 6, be provided with the distribution of air flow ring 19 of band dispensing orifice 19-1; at this moment; cooling duct 14 comprises cavity 21 between gap 20, copper sheathing 6 and the insulation protective jacket 7 that forms between distribution of air flow ring 19 and the copper sheathing 6 and the through hole 2-2 that leads to nozzle 9 peripheries, and spiral air flow passage 12 then communicates with the inner chamber 9-1 and the outlet 9-2 thereof of nozzle 9 by the dispensing orifice 19-1 on the distribution of air flow ring 19.Meanwhile, cancelled the through hole 6-1 structure of the inclined hole 5-1 and the copper sheathing 6 of insulation sleeve 5.All the other structures are identical with first embodiment.

When the utility model uses, as shown in Figure 1, be connected to lead 3 on the copper sheathing 6.When air-flow by the gas channel 2 of cutting torch body 1 after air flue 4-1 enters conduction rifle core 4, enter cavity 13 immediately, enter spiral air flow passage 12 again, be rotated pressurization accelerated motion, this air-flow is after electrode 10 motions, enter nozzle 9 inner chamber 9-1, through compression once more, the plasma arc hyper tape delivery nozzle 9 that electrode 10 is emitted exports 9-2.Meanwhile, another road air-flow enters the through hole 6-1 of inclined hole 5-1, cavity 11 and the copper sheathing 6 of insulation sleeve 5 from cavity 13, and is subjected to the guiding of insulation protective jacket 7 and brushes periphery at nozzle 9, thereby nozzle 9 is cooled off.

Claims

1, a kind of air plasma arc cutting torch; electrode (10) and nozzle (9) with cutting torch body (1), conduction rifle core (4), insulation sleeve (5), copper sheathing (6), insulation protective jacket (7), band hafnium filament (10-1); has the air flue (4-1) that communicates with the gas channel (2) of cutting torch body (1) on the conduction rifle core (4); insulation sleeve (5) is sleeved on the conduction rifle core (4); copper sheathing (6) is sleeved on the periphery of insulation sleeve (5), it is characterized in that:

Be provided with spiral air flow passage (12) in the cavity (13) of a, formation between insulation sleeve (5) and conduction rifle core (4), spiral air flow passage (12) communicates with the inner chamber (9-1) and the outlet (9-2) thereof of nozzle (9);

B, described cavity (13) also communicate with cooling duct (14), and nozzle (9) periphery is led in cooling duct (14) outlet.

2, air plasma arc cutting torch according to claim 1 is characterized in that: described spiral air flow passage (12) is to be formed with the assembling of insulation sleeve (5) endoporus by the screw thread (4-2) that conduction rifle core (4) periphery is provided with.

3, air plasma arc cutting torch according to claim 1 is characterized in that: described spiral air flow passage (12) is to be formed with the periphery assembling of conduction rifle core (4) by the screw thread that insulation sleeve (5) inwall is provided with.

4, according to claim 2 or 3 described air plasma arc cutting torches, it is characterized in that: screw thread (4-2) is a multiple thread.

5, according to claim 1 or 2 or 3 described air plasma arc cutting torches, it is characterized in that: cooling duct (14) comprise that insulation sleeve (5) is gone up the cavity (11) that forms between inclined hole (5-1), copper sheathing (6) and the insulation sleeve (5), the through hole (6-1) and the insulation protective jacket (7) of copper sheathing (6) front portion is looped around copper sheathing (6) and the formed outlet of nozzle (9) periphery (15).

6, according to claim 1 or 2 or 3 described air plasma arc cutting torches; it is characterized in that: cooling duct (14) comprise cavity (21) between gap (20), copper sheathing (6) and the insulation protective jacket (7) that forms between distribution of air flow ring (19) and the copper sheathing (6) and the through hole (2-2) that leads to nozzle (9) periphery, and spiral air flow passage (12) then communicates with the inner chamber (9-1) and the outlet (9-2) thereof of nozzle (9) by the dispensing orifice (19-1) on the distribution of air flow ring (19).

7, air plasma arc cutting torch according to claim 1, it is characterized in that: also be provided with intake tunnel (18) and exhalant canal (17) on the cutting torch body (1), be provided with water guide core (16) in the endoporus of conduction rifle core (4) and electrode (10), water guide core (16) two ends communicate with intake tunnel (18) and exhalant canal (17) respectively.