Spiral gas path plasma cutting gun

Abstract

The utility model discloses a spiral gas circuit plasma cutting gun which comprises a gun body, an anode conductor, a cathode conductor, a first insulator, a motor, a nozzle seat, a second insulator and a nozzle, the anode conductor and the cathode conductor are arranged in the gun body, the right end of the cathode conductor is connected with the motor, and the second insulator is connected with the nozzle seat. The nozzle holder is arranged below the anode conductor, the right side of the nozzle holder is fixedly connected with the nozzle, the left side of the nozzle holder is fixedly connected with the second insulator, the first insulator is arranged on the left side of the second insulator, the cathode conductor is wrapped with the first insulator, and the second insulator is arranged on the right side of the second insulator. A spiral air outlet is arranged between the cathode conductor and the second insulator, and a detachable copper ring is arranged between the spiral air outlet and the second insulator. According to the spiral gas path plasma cutting gun, the copper ring is arranged on the outer ring of the spiral gas outlet hole, and deformation of an insulating material caused by high temperature is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma cutting torches, in particular to a spiral gas path plasma cutting torch. Background Technique

[0002] A plasma cutting torch is a processing method that uses the heat of a high-temperature plasma arc to locally melt the metal at the workpiece cutting edge and discharges the molten metal with the momentum of a high-speed plasma to form a cut. It is widely used because of its advantages such as fast cutting speed, high cutting accuracy, easy setting of cutting conditions, easy realization of automated and unmanned operations, and relatively low cost.

[0003] The prior art discloses a plasma water mist cutting torch (application number: CN201410351511.8). It is proposed in the text that "it includes a cutting torch body, the cutting torch body has a housing and an insulating cylinder, a conductor, an electrode, a distributor, and a nozzle all installed in the housing. The gap area between the distributor and the electrode is an air flow distribution channel. The nozzle is installed at the bottom end of the distributor. An air inlet channel is provided in the conductor. The outer periphery of the bottom end of the nozzle and the electrode forms an air outlet channel. A plasma flame ejection hole is provided at the bottom end of the nozzle. The air inlet channel, the air flow distribution channel, the air outlet channel, and the plasma flame ejection hole are sequentially connected to form an air flow channel. A water mist ejection hole is provided at the bottom end of the housing at a position opposite to the plasma flame ejection hole. A water mist generation channel is provided in the cutting torch body. The water mist ejection hole is connected to the water mist generation channel." This invention can not only achieve plasma cutting of the workpiece to be cut, but also simultaneously water-cool the workpiece to be cut and avoid the generation of soot, strong light, and harmful gases during the cutting process. However, in this invention, a first insulator is provided on the outer circle of the spiral air flow groove, which has the risk of deformation when encountering high temperature, thus affecting the spiral. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spiral gas path plasma cutting torch to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, a spiral gas path plasma cutting torch is provided, including: a torch body, an anode conductor, a cathode conductor, a first insulator, a motor, a nozzle seat, a second insulator, and a nozzle. The anode conductor and the cathode conductor are arranged inside the torch body. The right end of the cathode conductor is connected to the motor. The nozzle seat is arranged below the anode conductor. A protection air hole is formed between the anode conductor and the nozzle seat. The right side of the nozzle seat is fixedly connected to the nozzle. The left side of the nozzle seat is fixedly connected to the second insulator. The first insulator is arranged on the left side of the second insulator. An ion gas air duct is formed between the first insulator and the second insulator. The first insulator wraps around the outside of the cathode conductor.

[0006] The anode conductor, the first insulator, and the second insulator form a first annular cavity. An air inlet hole communicating with the first annular cavity is provided on the gun body. The first annular cavity communicates with the protection air holes. The cathode conductor, the first insulator, and the second insulator form a second annular cavity. The first annular cavity communicates with the second annular cavity through the ion gas airway. A spiral air outlet hole is provided between the cathode conductor and the second insulator. A detachable copper ring is provided between the spiral air outlet hole and the second insulator. The spiral air outlet hole communicates with the second annular cavity. A plasma gas cavity is formed between the nozzle and the motor. The gun body and the nozzle form a third annular cavity. The protection air holes communicate with the third annular cavity.

[0007] Further, a fixed cover is provided on the outer circle of the anode conductor. A protection cap is fixedly installed on the right side of the fixed cover. The protection cap and the nozzle form a third annular cavity.

[0008] Further, an insulating material is provided outside the copper ring.

[0009] Further, an internal water pipe is provided inside the cathode conductor. The internal water pipe is arranged on the inner circle of the cathode conductor. The motor is fixedly installed on the right side of the internal water pipe. The gun body is provided with a water inlet pipe and a water return pipe communicating with the internal water pipe.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. After the compressed air enters through the air inlet hole, a part of it enters the spiral air outlet hole through the ion gas airway to generate plasma gas, thereby improving the penetration power and cutting speed;

[0012] 2. After the compressed air enters through the air inlet hole, another part enters the third annular cavity through the first annular cavity and the protection air holes to cool the nozzle and blow away the spatter generated during cutting;

[0013] 3. A copper ring is provided outside the spiral air outlet hole to prevent the insulating material from deforming due to high temperature and affecting the spiral, thereby improving the stability of the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic diagram of the water cooling flow direction of the structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the compressed air flow direction of the structure of the present utility model.

[0017] Reference Numerals in the Figures: 1. Gun body; 2. Anode conductor; 3. Cathode conductor; 4. First insulator; 5. Motor; 6. Nozzle seat; 7. Second insulator; 8. Nozzle; 9. Protection air hole; 10. Ion gas air passage; 11. First annular cavity; 12. Air inlet hole; 13. Second annular cavity; 14. Spiral air outlet hole; 15. Copper ring; 16. Plasma gas cavity; 17. Third annular cavity; 18. Fixed cover; 19. Protection cap; 20. Internal water pipe; 21. Water inlet pipe; 22. Water return pipe. Detailed Implementation Manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1 , the present invention provides a spiral gas path plasma cutting torch, including: gun body 1, anode conductor 2, cathode conductor 3, first insulator 4, motor 5, nozzle seat 6, second insulator 7 and nozzle 8.

[0020] An internal water pipe 20 is provided inside the cathode conductor 3. The internal water pipe 20 is arranged in the inner circle of the cathode conductor 3. The motor 5 is fixedly installed on the right side of the internal water pipe 20. A water inlet pipe 21 and a water return pipe 22 communicating with the internal water pipe 20 are arranged on the gun body 1. Water cooling enters the internal water pipe 20 through the water inlet pipe 21, cools the electrode inside the cathode conductor 3, and then the heat is taken away by the water return pipe 22, thereby improving the service life of the cathode conductor 3.

[0021] The anode conductor 2 and the cathode conductor 3 are arranged inside the gun body 1. The right end of the cathode conductor 3 is connected to the motor 5. The nozzle seat 6 is arranged below the anode conductor 2. A protection air hole 9 is formed between the anode conductor 2 and the nozzle seat 6.

[0022] The right side of the nozzle seat 6 is fixedly connected to the nozzle 8. The left side of the nozzle seat 6 is fixedly connected to the second insulator 7. The first insulator 4 is arranged on the left side of the second insulator 7. An ion gas air passage 10 is formed between the first insulator 4 and the second insulator 7. The first insulator 4 is wrapped outside the cathode conductor 3.

[0023] The anode conductor 2, the first insulator 4, and the second insulator 7 form a first annular cavity 11. An air inlet hole 12 communicating with the first annular cavity 11 is provided on the gun body 1, and the first annular cavity 11 communicates with the protection air hole 9.

[0024] The cathode conductor 3, the first insulator 4, and the second insulator 7 form a second annular cavity 13. The first annular cavity 11 communicates with the second annular cavity 13 through the ion gas airway 10.

[0025] A spiral air outlet hole 14 is provided between the cathode conductor 3 and the second insulator 7. A detachable copper ring 15 is provided between the spiral air outlet hole 14 and the second insulator 7, and an insulating material is provided outside the copper ring 15.

[0026] The spiral air outlet hole 14 communicates with the second annular cavity 13. A plasma gas cavity 16 is formed between the nozzle 8 and the motor 5, and a third annular cavity 17 is formed between the gun body 1 and the nozzle 8.

[0027] A fixed cover 18 is provided on the outer ring of the anode conductor 2. A protection cap 19 is fixedly installed on the right side of the fixed cover 18. The protection cap 19 and the nozzle 8 form a third annular cavity 17, and the protection air hole 9 communicates with the third annular cavity 17.

[0028] Working principle: As Figures 2 - 3 shown, when the motor 5 generates current, after the compressed air enters through the air inlet hole 12, a part of it enters the second annular cavity 13 through the ion gas airway 10 after passing through the first annular cavity 11 and then enters the spiral air outlet hole 14. The cathode conductor 3, the anode conductor 2, and the current react to make the compressed air generate plasma gas, which is then ejected from the nozzle; another part of the compressed air enters the third annular cavity 17 after passing through the first annular cavity 11 and the protection air hole 9, which is used to cool the nozzle and blow away the spatter generated during cutting. The water cooling enters through the water inlet pipe 21 into the internal water pipe 20 to cool the electrode inside the cathode conductor 3 and then takes away the heat through the water return pipe 22; this is the whole process of the operation of this spiral gas path plasma cutting torch.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral gas path plasma cutting torch, comprising: A gun body (1), an anode conductor (2), a cathode conductor (3), a first insulator (4), a motor (5), a nozzle seat (6), a second insulator (7) and a nozzle (8), characterized in that: the anode conductor (2) and the cathode conductor (3) are arranged inside the gun body (1), the right end of the cathode conductor (3) is connected to the motor (5), the nozzle seat (6) is arranged below the anode conductor (2), a protection air hole (9) is formed between the anode conductor (2) and the nozzle seat (6), the right side of the nozzle seat (6) is fixedly connected to the nozzle (8), the left side of the nozzle seat (6) is fixedly connected to the second insulator (7), the first insulator (4) is arranged on the left side of the second insulator (7), an ion gas airway (10) is formed between the first insulator (4) and the second insulator (7), and the first insulator (4) wraps around the outside of the cathode conductor (3); The anode conductor (2) and the first insulator (4) and the second insulator (7) form a first annular cavity (11), an air inlet hole (12) communicating with the first annular cavity (11) is arranged on the gun body (1), the first annular cavity (11) communicates with the protection air hole (9), the cathode conductor (3) and the first insulator (4) and the second insulator (7) form a second annular cavity (13), the first annular cavity (11) communicates with the second annular cavity (13) through the ion gas airway (10), a spiral air outlet hole (14) is arranged between the cathode conductor (3) and the second insulator (7), a detachable copper ring (15) is arranged between the spiral air outlet hole (14) and the second insulator (7), the spiral air outlet hole (14) communicates with the second annular cavity (13), a plasma gas cavity (16) is formed between the nozzle (8) and the motor (5), a third annular cavity (17) is formed between the gun body (1) and the nozzle (8), and the protection air hole (9) communicates with the third annular cavity (17).

2. The spiral gas path plasma cutting torch according to claim 1, wherein: A fixed cover (18) is arranged on the outer ring of the anode conductor (2), a protection cap (19) is fixedly installed on the right side of the fixed cover (18), and the protection cap (19) and the nozzle (8) form a third annular cavity (17).

3. The spiral gas path plasma cutting torch according to claim 1, wherein: An insulating material is arranged outside the copper ring (15).

4. A spiral gas path plasma cutting torch according to claim 1, characterized in that: An internal water pipe (20) is arranged inside the cathode conductor (3), the internal water pipe (20) is arranged on the inner ring of the cathode conductor (3), the motor (5) is fixedly installed on the right side of the internal water pipe (20), and a water inlet pipe (21) and a water return pipe (22) communicating with the internal water pipe (20) are arranged on the gun body (1).

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