CN218103618U - Cathode head for plasma torch - Google Patents
Cathode head for plasma torch Download PDFInfo
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- CN218103618U CN218103618U CN202222314535.9U CN202222314535U CN218103618U CN 218103618 U CN218103618 U CN 218103618U CN 202222314535 U CN202222314535 U CN 202222314535U CN 218103618 U CN218103618 U CN 218103618U
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- plasma torch
- arc striking
- middle cylinder
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Abstract
The utility model belongs to the technical field of plasma torches, and relates to a cathode head for a plasma torch, which comprises a cathode head main body, wherein the cathode head main body comprises an arc striking emitter, a middle cylinder, a tail cylinder and a connecting part, the arc striking emitter, the middle cylinder and the tail cylinder are sequentially connected from left to right, and the connecting part is used for being abutted to a water-cooled tube of the plasma torch; the arc striking emitter is made of tungsten or tungsten alloy and is integrally formed by an arc striking cylinder and an arc striking segment, and one end of the arc striking cylinder is fixed with one end of the middle cylinder; a threaded hole is formed in the middle cylinder, an included angle gamma exists between a straight line where the hole wall of the threaded hole is located and the vertical direction, and the degree of the included angle gamma is 90-120 degrees; and the connecting end of the plasma torch water-cooling tube is provided with an inclination angle epsilon, and an inclined plane where the inclination angle epsilon is positioned is abutted against the threaded hole, so that the cathode head main body and the plasma torch water-cooling tube are sealed firmly. The utility model discloses an improvement to the negative pole head structure has good water-cooling effect when possessing the compression electric arc effect, has prolonged the life of negative pole head.
Description
Technical Field
The utility model belongs to the technical field of plasma torch, a plasma torch is with negative pole head is related to.
Background
The plasma torch is a device for generating high-temperature plasma, and has been widely applied to high-temperature heat sources. The structure of the plasma arc nozzle comprises a cathode component, an anode component, a water cooling system, a gas system and the like, wherein a nozzle center hole at the front end of a cathode head is a plasma arc channel, and internal high-temperature plasma transfers heat to a nozzle and water flow inside the cathode head by water cooling of an anode inner wall and water cooling heat conduction of the cathode head.
In the structure, the cathode head in the cathode part is a core part for arc striking, the working environment is relatively severe, so that the cathode head becomes a vulnerable part in the whole system structure, and the service life of the cathode head directly influences the working efficiency and the running cost of the plasma torch. The existing cathode head structure can compress electric arcs to a certain extent, but is easy to discharge in a non-discharge area during high-frequency arc striking, so that ablation is caused, and the service life of the cathode head is shortened; and the cooling water is easy to generate vortex, the heat is not taken away timely, and the water cooling effect is reduced.
Therefore, the utility model provides a novel plasma torch cathode head to solve the technical problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a cathode head for a plasma torch.
The utility model aims at solving through the following technical scheme:
the cathode head for the plasma torch comprises a cathode head main body, wherein the cathode head main body comprises an arc striking emitter, a middle cylinder, a tail cylinder and a connecting part which is used for being abutted with a water-cooled tube of the plasma torch, wherein the arc striking emitter, the middle cylinder and the tail cylinder are sequentially connected from left to right; the arc striking emitter is made of tungsten or tungsten alloy and is integrally formed by an arc striking cylinder and an arc striking segment, and one end of the arc striking cylinder is fixed with one end of the middle cylinder; a threaded hole is formed in the middle cylinder, an included angle gamma exists between a straight line where the hole wall of the threaded hole is located and the vertical direction, and the degree of the included angle gamma is 90-120 degrees; and the connecting end of the plasma torch water-cooling tube is provided with an inclination angle epsilon, and an inclined plane where the inclination angle epsilon is positioned is abutted against the threaded hole, so that the cathode head main body and the plasma torch water-cooling tube are sealed firmly.
Furthermore, one end of the arc striking cylinder is welded and fixed with one end of the middle cylinder.
Further, a transition angle alpha exists between the arc striking cylinder and the middle cylinder, and the degree of the transition angle alpha is 60-90 degrees.
Furthermore, the clamping structure convenient to disassemble and assemble is arranged on the outer side of one end, connected with the tail cylinder, of the middle cylinder.
Furthermore, the clamping structure is an outer hexagonal structure.
Further, a transition angle delta exists between the left end of the outer hexagonal body structure and the middle cylinder, and the degree of the transition chamfer angle delta is 110-150 degrees.
Further, a transition angle beta is arranged on the left end face of the tail cylinder, and the degree of the transition angle beta is 30-60 degrees.
Further, the degree of the inclination angle epsilon is 30-60 degrees.
Further, the diameter of the arc striking emitter is 8-18 mm.
Furthermore, the middle cylinder is made of pure copper or copper-based alloy, and the diameter of the middle cylinder is 20-30 mm.
Compared with the prior art, the utility model provides a technical scheme includes following beneficial effect: through improving the structure of negative pole head, specifically do: the arc striking emitter is formed by integrally forming the arc striking cylinder and the arc striking segment, and is made of tungsten or tungsten alloy, because the tungsten alloy has extremely high melting point and extremely high temperature resistance, when the arc striking emitter works, the outer surface of the arc striking emitter is not easy to be burnt out of a pit by arc flame flow, and therefore the service life of the cathode head is prolonged. Meanwhile, due to the design of the threaded holes, the use of materials is reduced, the heat accumulation in the cathode head is reduced, the heat dissipation area is increased, and the cooling effect is improved; and the included angle gamma between the straight line of the hole wall of the threaded hole and the vertical direction is matched with the inclination angle epsilon of the connecting end of the plasma torch water-cooling tube, and the inclined plane where the inclination angle epsilon is positioned is abutted against the threaded hole, so that the hard sealing of the cathode head main body and the plasma torch water-cooling tube is realized, and the sealing requirement under the high water pressure environment can be met.
In addition, the disassembly and the assembly of the cathode head can be facilitated by matching the wrench with the external hexagonal structure; the middle cylinder is made of pure copper or copper-based alloy, so that heat accumulated in the cathode head can be effectively dissipated, and the service life of the cathode head is prolonged; through the mutual matching of the transition angle alpha between the arc striking cylinder and the middle cylinder, the transition angle beta arranged on the left end surface of the tail cylinder and the transition angle delta between the left end of the outer hexagonal body structure and the middle cylinder, the generation and the concentration of plasma jet on the cathode head are facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is an external structural view of a cathode head for a plasma torch according to the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
fig. 3 is a schematic structural view of the plasma torch cathode head and the nozzle of the present invention.
Wherein: 1. an arc initiating emitter; 2. a middle cylinder; 3. a tail cylinder; 4. a connecting portion; 5. a threaded hole; 6. a plasma torch water-cooled tube; 7. an outer hexagonal structure; alpha, a transition angle between the arc striking cylinder and the middle cylinder; beta, a transition angle arranged on the left end surface of the tail cylinder; gamma, the included angle between the straight line where the hole wall of the threaded hole is located and the vertical direction; delta, a transition angle between the left end of the outer hexagonal structure and the middle cylinder; epsilon, inclination angle.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the following claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1-3, the utility model provides a cathode head for plasma torch, which comprises a cathode head main body, wherein the cathode head main body comprises an arc striking emitter 1, a middle cylinder 2, a tail cylinder 3 and a connecting part 4 which is connected with a plasma torch water-cooling tube 6 in sequence from left to right; the arc striking emitter 1 is made of tungsten or tungsten alloy and is integrally formed by an arc striking cylinder and an arc striking segment, and one end of the arc striking cylinder is fixed with one end of the middle cylinder 2; a threaded hole 5 is formed in the middle cylinder 2, an included angle gamma exists between a straight line where the hole wall of the threaded hole 5 is located and the vertical direction, and the degree of the included angle gamma is 90-120 degrees; and the connecting end of the plasma torch water-cooling tube 6 is provided with an inclination angle epsilon, and an inclined plane where the inclination angle epsilon is positioned is abutted against the threaded hole 5, so that the cathode head main body is sealed with the plasma torch water-cooling tube 6.
Furthermore, one end of the arc striking cylinder is welded and fixed with one end of the middle cylinder 2.
Furthermore, a transition angle alpha exists between the arc striking cylinder and the middle cylinder 2, and the degree of the transition angle alpha is 60-90 degrees.
Furthermore, the outer side of the end, connected with the tail cylinder 3, of the middle cylinder 2 is provided with a clamping structure convenient to disassemble and assemble.
Furthermore, the clamping structure is an outer hexagonal structure 7.
Further, a transition angle delta exists between the left end of the outer hexagonal structure 7 and the middle cylinder 2, and the degree of the transition chamfer delta is 110-150 degrees.
Further, a transition angle beta is arranged on the left end face of the tail cylinder 3, and the degree of the transition angle beta is 30-60 degrees.
Further, the degree of the inclination angle epsilon is 30-60 degrees.
Further, the diameter of the arc ignition emitter 1 is 8-18 mm.
Further, the middle cylinder 2 is made of pure copper or copper-based alloy, and the diameter of the middle cylinder is 20-30 mm.
In conclusion, in the cathode head for the plasma torch, the arc striking emitter 1 is integrally formed by the arc striking cylinder and the arc striking segment, and the arc striking emitter 1 is made of tungsten or tungsten alloy, because the tungsten alloy has extremely high melting point and excellent high temperature resistance, when the cathode head works, the outer surface of the arc striking emitter 1 is not easy to be burnt out of a pit by arc flame flow, and therefore the service life of the cathode head is prolonged. Meanwhile, due to the design of the threaded hole 5, the used materials are reduced, meanwhile, the heat accumulation in the cathode head is reduced, the heat dissipation area is increased, and the cooling effect is improved; and the included angle gamma between the straight line of the hole wall of the threaded hole 5 and the vertical direction is matched with the inclination angle epsilon of the connecting end of the plasma torch water-cooling tube 6, and the inclined plane of the inclination angle epsilon is abutted against the threaded hole 5, so that the metal hard sealing of the cathode head main body and the plasma torch water-cooling tube 6 is realized, and the sealing requirement under the high-water-pressure environment can be met.
In addition, the disassembly and the assembly of the cathode head can be facilitated by matching the wrench with the external hexagonal structure 7; the middle cylinder 2 is made of pure copper or copper-based alloy, so that heat accumulated in the cathode head can be effectively dissipated, and the service life of the cathode head is prolonged; through the mutual matching of the transition angle alpha between the arc ignition cylinder 1 and the middle cylinder 2, the transition angle beta arranged on the left end surface of the tail cylinder 3 and the transition angle delta between the left end of the outer hexagonal structure 7 and the middle cylinder 2, the generation and the concentration of plasma jet on a cathode head are facilitated.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The cathode head for the plasma torch is characterized by comprising a cathode head main body, wherein the cathode head main body comprises an arc ignition emitter (1), a middle cylinder (2), a tail cylinder (3) and a connecting part (4) which is used for being abutted with a plasma torch water-cooling tube (6), wherein the arc ignition emitter, the middle cylinder (2) and the tail cylinder (3) are sequentially connected from left to right; the arc striking emitter (1) is made of tungsten or tungsten alloy and is integrally formed by an arc striking cylinder and an arc striking segment, and one end of the arc striking cylinder is fixed with one end of the middle cylinder (2); a threaded hole (5) is formed in the middle cylinder (2), an included angle gamma exists between a straight line where the hole wall of the threaded hole (5) is located and the vertical direction, and the degree of the included angle gamma is 90-120 degrees; and an inclination angle epsilon is arranged at the connecting end of the plasma torch water-cooling tube (6), and an inclined plane where the inclination angle epsilon is positioned is abutted against the threaded hole (5), so that the cathode head main body and the plasma torch water-cooling tube (6) are sealed firmly.
2. The cathode head for a plasma torch according to claim 1, characterized in that one end of the arc ignition cylinder is welded and fixed to one end of the intermediate cylinder (2).
3. Cathode head for plasma torches according to claim 2, characterized in that a transition angle a exists between the ignition cylinder and the intermediate cylinder (2), the degree of said transition angle a being 60 ° to 90 °.
4. The cathode head for plasma torches according to claim 1, wherein a snap structure facilitating disassembly and assembly is provided at an outer side of an end of the middle cylinder (2) connected to the rear cylinder (3).
5. The cathode head for a plasma torch according to claim 4, characterized in that the snap-in structure is an external hexagonal structure (7).
6. The cathode head for plasma torches according to claim 5, wherein a transition chamfer δ exists between the left end of the outer hexagonal structure (7) and the middle cylinder (2), the degree of the transition chamfer δ being 110 ° to 150 °.
7. The cathode head for a plasma torch according to claim 1, characterized in that the left end face of the tail cylinder (3) is provided with a transition angle β, the degree of which is 30 ° -60 °.
8. The cathode head for a plasma torch as claimed in claim 1, wherein the inclination angle e is 30 ° to 60 °.
9. The cathode head for plasma torches according to claim 1, wherein the diameter of the arc initiation emitter (1) is 8 to 18mm.
10. The cathode head for plasma torches according to claim 1, wherein the intermediate cylindrical body (2) is made of pure copper or a copper-based alloy and has a diameter of 20 to 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222314535.9U CN218103618U (en) | 2022-08-31 | 2022-08-31 | Cathode head for plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222314535.9U CN218103618U (en) | 2022-08-31 | 2022-08-31 | Cathode head for plasma torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218103618U true CN218103618U (en) | 2022-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222314535.9U Active CN218103618U (en) | 2022-08-31 | 2022-08-31 | Cathode head for plasma torch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218103618U (en) |
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2022
- 2022-08-31 CN CN202222314535.9U patent/CN218103618U/en active Active
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