Plasma assembly for optimizing air cooling

Abstract

The utility model relates to a plasma assembly for optimizing air cooling, which belongs to the technical field of plasma cutting technology, and comprises a hollow shielding case body, the shielding case body comprises a far end and a near end, the far end of the shielding case body is provided with an injection hole, an annular insulator is fixedly arranged in the shielding case body, and the near end of the shielding case body is provided with a plurality of air outlets. The insulator is provided with a plurality of vortex holes with certain angles, the vortex holes are evenly and circumferentially distributed with the axis of the insulator as the center, one end of each vortex hole is located on the inner edge face of the insulator, and the other end of each vortex hole is located on the external source face of the insulator. According to the utility model, the annular holes communicated with the vortex holes are arranged, so that shielding gas can be discharged from one end, located on the inner edge surface of the insulator, of each vortex hole; the positions of the shielding gas discharged from the cavity are uniformly distributed, and the cooling effect is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to an optimized air-cooling plasma component, belonging to the technical field of plasma cutting technology. Background Art

[0002] The basic accessories of the existing fine plasma cutting torch include: cutting torch body, water pipe, electrode, nozzle, swirl ring, inner fixed cover with vortex generator, outer fixed cover, shield cover. Among them, the water pipe is installed in the main body, the electrode, nozzle, swirl ring, inner fixed cover are sequentially sleeved on the previous accessories and installed on the cutting torch body, while the shield cover is sleeved on the inner fixed cover, and the outer fixed cover is sleeved on the shield cover and installed on the cutting torch body. The plasma cutting torch is connected to the power supply and gas control console through pipelines. When the power supply is started, through the electrical control of the power supply circuit board, a pilot arc is formed between the electrode and the nozzle and transferred to the metal material to be cut, generating a plasma arc, thereby cutting the metal material with the movement of the CNC machine tool. During this period, the plasma arc gathers at the center of the electrode, and along the flow direction of the plasma gas, it passes through the nozzle aisle hole and the shield cover aisle hole in turn to reach the metal to be cut. The temperature of the plasma arc can reach over 30,000°C, but the plasma gas and the shielding gas form rotating vortex gas through the vortex ring and the vortex generator respectively, forming a protective layer between the arc and the passage hole of the accessories, so the accessories will not be melted. However, although the accessories are cooled by the coolant, there are still some places where the temperature is too high, causing oxidation, which causes the natural wear we see. Therefore, during the use of the entire plasma system, the electrode, nozzle, and shield are most susceptible to damage.

[0003] The Chinese invention patent with publication number CN109848615A discloses a shielding cover with optimized air cooling and improved cutting ability, which includes a shielding cover body, the shielding cover body includes a distal end and a proximal end, the distal end is provided with a spray hole, a step is provided in the shielding cover body, an annular insulator is provided at the step position, the annular insulator is provided with a circle of vortex holes along the radial direction, a chamber is formed between the outer edge surface of the annular insulator and the inner surface of the shielding cover body, and the vortex holes are connected to the chamber. The invention discloses a shielding cover with optimized air cooling and improved cutting ability, which can improve the vortex intensity of plasma gas, enhance the cooling effect, increase the service life of the shielding cover, and the cutting ability of the plasma cutting torch; at the same time, it reduces the fault tolerance in actual use and improves production efficiency. However, after long-term operation, some vortex holes in the prior art are easily blocked by impurities, resulting in uneven distribution of the position of the shielding gas when it is discharged from the chamber, thereby affecting the cooling effect.

[0004] Therefore, a plasma component with optimized air cooling is needed to ensure that the shielding gas is evenly distributed when it is discharged from the chamber to avoid affecting the cooling effect. Utility Model Content

[0005] The technical problem to be solved by the present utility model is: in order to overcome the deficiencies of the prior art, to provide an optimized air-cooled plasma component that ensures uniform distribution of the position when the protective gas is discharged from the chamber and avoids affecting the cooling effect.

[0006] The technical solution adopted by the present utility model to solve the above problems is: an optimized air-cooled plasma component, including a hollow shielding cover body, the shielding cover body includes a distal end and a proximal end, a spray hole is provided at the distal end of the shielding cover body, an annular insulator is fixedly arranged inside the shielding cover body, a plurality of eddy current holes with a certain angle are arranged on the insulator, and the plurality of eddy current holes are evenly circumferentially distributed around the axis of the insulator. One end of the eddy current hole is located on the inner edge surface of the insulator, and the other end of the eddy current hole is located on the outer edge surface of the insulator. A chamber is formed between the outer edge surface of the insulator and the inner surface of the shielding cover body, and the eddy current hole is communicated with the chamber. An annular hole is arranged inside the insulator, and each eddy current hole is communicated through the annular hole.

[0007] Preferably, the insulator includes a first insulating part and a second insulating part, and the first insulating part and the second insulating part are fixedly attached.

[0008] Preferably, a first arc-shaped groove and a plurality of first eddy current grooves are arranged on the first insulating part, a second arc-shaped groove and a plurality of second eddy current grooves are arranged on the second insulating part, the plurality of first eddy current grooves and the plurality of second eddy current grooves correspond one by one, the first eddy current groove and the second eddy current groove enclose to form an eddy current hole, and the first arc-shaped groove and the second arc-shaped groove enclose to form an annular hole.

[0009] Preferably, the first insulating part and the second insulating part are fixedly matched by bolts.

[0010] Preferably, a positioning hole is arranged on the first insulating part, a positioning post is arranged on the second insulating part, the positioning hole matches the positioning post, and the positioning post is inserted into the positioning hole.

[0011] Preferably, the insulator and the shielding cover body are fixedly matched by interference fit, threaded connection or gluing.

[0012] Preferably, the insulator is made of polyimide or ceramic material.

[0013] Preferably, the shielding cover body further includes a conical outer surface, and a seal is arranged between the conical outer surface and the proximal end.

[0014] Preferably, the shielding cover body is frustum-shaped, the distal end is the small-diameter end of the shielding cover body, and the proximal end is the large-diameter end of the shielding cover body.

[0015] Preferably, a step is provided inside the shielding cover body, and the insulator is located at the step.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] An optimized air-cooled plasma component of the present utility model ensures that the protective gas can be discharged from one end of each eddy current hole located on the inner edge surface of the insulator by providing an annular hole communicating with each eddy current hole, ensuring that the positions where the protective gas is discharged from the chamber are evenly distributed, and avoiding affecting the cooling effect. Description of the Drawings

[0018] Figure 1 is a perspective view of an optimized air-cooled plasma component of the present utility model;

[0019] Figure 2 is a cross-sectional view of an optimized air-cooled plasma component of the present utility model;

[0020] Figure 3 is a perspective view of the insulator;

[0021] Figure 4 is a cross-sectional view of the insulator;

[0022] Figure 5 is a perspective view of the first insulating portion;

[0023] Figure 6 is Figure 5 an enlarged view of part A of

[0024] Figure 7 is a perspective view of the second insulating portion;

[0025] Figure 8 is Figure 7 an enlarged view of part B of

[0026] Wherein:

[0027] shielding cover body 1, distal end 2, proximal end 3, injection hole 4, insulator 5, eddy current hole 6, chamber 7, annular hole 8, conical outer surface 9, seal 10;

[0028] first insulating portion 51, second insulating portion 52, bolt 53, positioning hole 54, positioning post 55;

[0029] first eddy current groove 61, second eddy current groove 62;

[0030] first arc groove 81, second arc groove 82. Detailed Embodiment

[0031] As Figures 1-8As shown in the figure, an optimized air-cooled plasma component in this embodiment includes a hollow shield body 1. The shield body 1 is frustum-shaped and includes a distal end 2 and a proximal end 3. Among them, the distal end 2 is the small-diameter end of the shield body 1, and the proximal end 3 is the large-diameter end of the shield body 1. A spray hole 4 is provided at the distal end 2 of the shield body 1. There is a step inside the shield body 1, and an annular insulator 5 is fixedly arranged at the step position. The insulator 5 and the shield body 1 are fixedly fitted by interference fit, threaded connection, gluing or other means. The insulator 5 is made of a material that is not conductive but has good heat conduction, such as polyimide, ceramics, etc. A plurality of eddy current holes 6 with a certain angle are provided on the insulator 5. The plurality of eddy current holes 6 are circumferentially and uniformly distributed around the axis of the insulator 5. One end of the eddy current hole 6 is located on the inner edge surface of the insulator 5, and the other end of the eddy current hole 6 is located on the outer edge surface of the insulator 5. A chamber 7 is formed between the outer edge surface of the insulator 5 and the inner surface of the shield body 1. The eddy current hole 6 is communicated with the chamber 7. When the shielding gas passes through other accessories of the cutting torch and reaches this chamber 7, the gas is stored here. On the one hand, the high-pressure cold gas can continuously cool the shield body. On the other hand, the shielding gas stored here passes through the eddy current hole 6 more stably, forming a stable eddy current gas, which is then ejected from the spray hole 4;

[0032] Of course, the insulator 5 can be arranged close to the spray hole 4, so that the eddy current gas generated by the eddy current hole 6 is more concentrated, which helps to compress the plasma arc for the second time and improve the cutting penetration ability;

[0033] The shield body 1 further includes a conical outer surface 9. An O-ring 10 is provided between the conical outer surface 9 and the proximal end 3;

[0034] An annular hole 8 is provided inside the insulator 5. The annular hole 8 is coaxially arranged with the insulator 5. Each eddy current hole 6 is communicated through the annular hole 8. The annular hole 8 and each eddy current hole 6 form an air passage;

[0035] The insulator 5 includes a first insulating part 51 and a second insulating part 52. The first insulating part 51 and the second insulating part 52 are fixedly attached. The first insulating part 51 and the second insulating part 52 can be fixedly fitted by bolts 53 or by gluing or other means. A first arc-shaped groove 81 and a plurality of first eddy current grooves 61 are provided on the first insulating part 51. A second arc-shaped groove 82 and a plurality of second eddy current grooves 62 are provided on the second insulating part 52. When the first insulating part 51 and the second insulating part 52 are fixedly fitted, the plurality of first eddy current grooves 61 and the plurality of second eddy current grooves 62 correspond one by one. The first eddy current groove 61 and the second eddy current groove 62 enclose to form the eddy current hole 6, and the first arc-shaped groove 81 and the second arc-shaped groove 82 enclose to form the annular hole 8;

[0036] A plurality of positioning holes 54 are provided on the first insulating portion 51, and a plurality of positioning posts 55 are provided on the second insulating portion 52. The plurality of positioning holes 54 correspond to and match the plurality of positioning posts 55 one by one. The positioning posts 55 are inserted into the positioning holes 54. During the fixed fitting of the first insulating portion 51 and the second insulating portion 52, through the cooperation between the positioning holes 54 and the positioning posts 55, a positioning effect is achieved, improving the fixed fitting accuracy of the first insulating portion 51 and the second insulating portion 52. Of course, the positioning holes 54 and the positioning posts 55 can also be respectively provided on the second insulating portion 52 and the first insulating portion 51, as long as it satisfies that the positioning post 55 for the fixed fitting of the first insulating portion 51 and the second insulating portion 52 is inserted into the positioning hole 54;

[0037] The protective gas in the chamber 7 is conveyed from one end of the eddy current hole 6 located on the outer edge surface of the insulator 5 to the turbine hole, and the protective gas in the eddy current hole 6 is discharged from the other end of the eddy current hole 6 after passing through the annular hole 8;

[0038] When one end of one of the eddy current holes 6 located on the outer edge surface of the insulator 5 is blocked, since the annular hole 8 communicates with each eddy current hole 6, the protective gas in the other eddy current holes 6 can still be conveyed to this eddy current hole 6 through the annular hole 8 and discharged from one end of this eddy current hole 6 located on the inner edge surface of the insulator 5, so as to ensure the uniform distribution of the position when the protective gas is discharged from the chamber 7 and avoid affecting the cooling effect.

[0039] In addition to the above embodiments, the present invention also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present invention.

Claims

1. A plasma component for optimizing air cooling, comprising a hollow shielding cover body (1), the shielding cover body (1) comprising a distal end (2) and a proximal end (3), a spray hole (4) being arranged at the distal end (2) of the shielding cover body (1), a ring-shaped insulator (5) being fixedly arranged inside the shielding cover body (1), a plurality of vortex holes (6) with a certain angle being arranged on the insulator (5), the plurality of vortex holes (6) being evenly distributed circumferentially with the axis of the insulator (5) as the center, one end of the vortex hole (6) being located at the inner edge surface of the insulator (5), the other end of the vortex hole (6) being located at the outer source surface of the insulator (5), a chamber (7) being formed between the outer edge surface of the insulator (5) and the inner surface of the shielding cover body (1), the vortex hole (6) being connected to the chamber (7), characterized in that: An annular hole (8) is provided in the insulator (5), and each eddy current hole (6) is connected via the annular hole (8).

2. The plasma assembly with optimized air cooling according to claim 1, characterized in that: The insulator (5) comprises a first insulating portion (51) and a second insulating portion (52), wherein the first insulating portion (51) and the second insulating portion (52) are fixedly attached.

3. The plasma assembly with optimized air cooling according to claim 2, characterized in that: The first insulating portion (51) is provided with a first arc-shaped groove (81) and a plurality of first eddy current grooves (61), and the second insulating portion (52) is provided with a second arc-shaped groove (82) and a plurality of second eddy current grooves (62), the plurality of first eddy current grooves (61) and the plurality of second eddy current grooves (62) being in one-to-one correspondence, the first eddy current grooves (61) and the second eddy current grooves (62) being combined to form an eddy current hole (6), and the first arc-shaped groove (81) and the second arc-shaped groove (82) being combined to form an annular hole (8).

4. The plasma assembly with optimized air cooling according to claim 2, characterized in that: The first insulating part (51) and the second insulating part (52) are fixedly matched by means of bolts (53).

5. The plasma assembly with optimized air cooling according to claim 2, characterized in that: A positioning hole (54) is provided on the first insulating portion (51), and a positioning column (55) is provided on the second insulating portion (52); the positioning hole (54) matches the positioning column (55), and the positioning column (55) is inserted into the positioning hole (54).

6. The plasma assembly with optimized air cooling according to claim 1, characterized in that: The insulator (5) and the shielding cover body (1) are fixedly fitted by means of interference fit, threaded connection or gluing.

7. The plasma assembly with optimized air cooling according to claim 1, characterized in that: The insulator (5) is made of polyimide or ceramic.

8. The plasma assembly with optimized air cooling according to claim 1, characterized in that: The shielding cover body (1) further comprises a conical outer surface (9), and a sealing member (10) is provided between the conical outer surface (9) and the proximal end (3).

9. The plasma assembly with optimized air cooling according to claim 1, characterized in that: The shielding cover body (1) is in the shape of a truncated cone, the distal end (2) is the small-diameter end of the shielding cover body (1), and the proximal end (3) is the large-diameter end of the shielding cover body (1).

10. The plasma assembly with optimized air cooling according to claim 1, characterized in that: A step is provided inside the shielding cover body (1), and the insulator (5) is located at the step.

Images