CN211509401U - Controllable arc spot tube type cathode structure - Google Patents
Controllable arc spot tube type cathode structure Download PDFInfo
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- CN211509401U CN211509401U CN201921838832.5U CN201921838832U CN211509401U CN 211509401 U CN211509401 U CN 211509401U CN 201921838832 U CN201921838832 U CN 201921838832U CN 211509401 U CN211509401 U CN 211509401U
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Abstract
The utility model belongs to the technical field of thermal plasma, concretely relates to controllable arc spot tubular cathode structure, including the negative pole, locate the outer negative pole water-cooling jacket of negative pole, locate the outside magnetic field coil of negative pole water-cooling jacket, the negative pole be located the negative pole water-cooling jacket, both coaxial arrangement, the outside magnetic field coil that winds of negative pole water-cooling jacket to negative pole water-cooling jacket lower extreme is equipped with the insulator. The cathode adopts a tubular structure, so that the ablation area of the cathode is expanded, and the service life of the cathode is further prolonged. The cathode has simple structure, large effective ablation area and long service life. The water cooling jacket is a hollow cylinder, a certain gap is formed between the water cooling jacket and the surface of the cathode, and cooling water is forced to enter the gap first and then return to the outer layer, so that the cooling effect is improved. The number of turns of the magnetic field coil is increased as much as possible, and under the condition of generating the same magnetic field intensity, the current is reduced, and the heating is reduced.
Description
Technical Field
The utility model belongs to the technical field of thermal plasma, concretely relates to controllable arc spot tubular cathode structure.
Background
The thermal plasma has the characteristics of high temperature, high enthalpy, high energy density, controllable atmosphere and the like, and is widely applied to the fields of cutting, welding, spraying, material preparation, waste treatment and the like. As a device for generating thermal plasma, a plasma torch is required to have characteristics of high stability, high efficiency, long life, and the like in industrial applications.
Typically, an arc plasma torch includes a cathode and at least one anode, an arc is generated between the cathode and the anode, and the heat energy of the arc is carried away by a working gas to form a plasma jet.
Different application areas have different requirements on the plasma jet. If plasma cutting requires high jet speed and high strength; the plasma waste treatment requires large jet sectional area and strong activity. The different requirements of the jets put different demands on the structural design of the torch.
Disclosure of Invention
The utility model aims at providing a controllable arc spot tubular cathode structure that cathode life is higher.
The technical scheme of the utility model as follows:
the utility model provides a controllable arc spot tubular cathode structure, includes the negative pole, locates the outside negative pole water-cooling jacket of negative pole, locates the outside magnetic field coil of negative pole water-cooling jacket, the negative pole be located negative pole water-cooling jacket, both coaxial arrangements, the outside magnetic field coil that winds of negative pole water-cooling jacket to negative pole water-cooling jacket lower extreme is equipped with the insulator.
The cathode is hollow, the top end of the cathode is closed, the lower end of the cathode is open, and the top end of the cathode is provided with an opening which is used as a cathode gas inlet.
The cathode water cooling jacket is a hollow cylinder with an opening at the bottom, a mounting hole is processed at the upper end face, the upper end of the cathode is positioned in the mounting hole, the cathode main body is positioned in the cathode water cooling jacket, and the bottom of the cathode 1 is hermetically connected with the opening at the bottom of the cathode water cooling jacket.
The cathode water cooling jacket is characterized in that a certain gap is formed between the inner wall of the cathode water cooling jacket and the surface of the cathode, the gap is a cooling water channel, and a cathode cooling water inlet and outlet and a cathode cooling water outlet are processed on the cathode water cooling jacket.
The number of turns of the magnetic field coil is 250-300.
The height of the cathode is 150-170 mm, and the radius is 8-12 mm
The magnetic field coil is connected with a power supply.
The output current of the power supply is 8-12A.
The utility model has the advantages as follows: the cathode adopts a tubular structure, so that the ablation area of the cathode is expanded, and the service life of the cathode is further prolonged. The cathode has simple structure, large effective ablation area and long service life. The water cooling jacket is a hollow cylinder, a certain gap is formed between the water cooling jacket and the surface of the cathode, and cooling water is forced to enter the gap first and then return to the outer layer, so that the cooling effect is improved. The number of turns of the magnetic field coil is increased as much as possible, and under the condition of generating the same magnetic field intensity, the current is reduced, and the heating is reduced.
Drawings
FIG. 1 is a controlled arc spot tube cathode structure;
in the figure: 1. a cathode; 2. a cathode water cooling jacket; 3. a cathode cooling water outlet; 4. a magnetic field coil; 5. an insulator; 6. a power source; 7. a cathode cooling water inlet; 8. a cathode gas inlet.
Detailed Description
The present invention will be further explained with reference to the drawings and the detailed description.
The cathode 1 is positioned in the cathode water cooling jacket 2, and the cathode and the water cooling jacket are coaxially arranged. The cathode water cooling jacket 2 is externally wound with a magnetic field coil 4, an insulator 5 is arranged at the lower end of the cathode water cooling jacket 2, and the magnetic field coil 4 is connected with a power supply 6.
The cathode 1 is hollow, and the cathode is made of red copper, so the cathode 1 is a red copper pipeline, the top end of the cathode is closed, and the lower end of the cathode is open. The top end is provided with an opening as a cathode gas inlet 8, through which cathode gas inlet 8 gas is passed from the outside into the copper tubing of the cathode 1.
The cathode water cooling jacket 2 is a hollow cylinder with an opening at the bottom, a mounting hole is processed at the upper end face, the upper end of the cathode 1 is positioned in the mounting hole, the main body of the cathode 1 is positioned in the cathode water cooling jacket 2, and the bottom of the cathode 1 is hermetically connected with the opening at the bottom of the cathode water cooling jacket 2. Meanwhile, a certain gap is formed between the inner wall of the cathode water cooling jacket 2 and the surface of the cathode 1, the gap is a cooling water channel, and a cathode cooling water inlet and outlet 7 and a cathode cooling water outlet 3 are processed on the cathode water cooling jacket 2.
The magnetic field coil 4 arranged outside the cathode water cooling jacket 2 is used for accelerating the rotation of the arc spot.
The magnetic field coil 4 is wound by an insulated copper wire, and the number of turns is 250-350; the power supply 6 of the field coil is direct current, and the direction and the magnitude of the output current can be changed.
The preferred cathode 1 has a height of 160mm and a radius of 10 mm.
When the device is in operation, nitrogen or argon is introduced into the cathode gas inlet 8 of the cathode 1 to start the plasma torch. The power supply 6 is adjusted to output current to 10A, the magnetic field coil 4 can generate a magnetic field to drive the cathode arc spot to rotate, so that the cathode is ablated more uniformly, and the service life of the cathode is prolonged.
Claims (7)
1. The utility model provides a controllable arc spot tubular cathode structure, includes negative pole (1), locates negative pole water-cooling jacket (2) outside field coil (4), its characterized in that: the cathode (1) is positioned in the cathode water cooling jacket (2) and coaxially mounted, a magnetic field coil (4) is wound outside the cathode water cooling jacket (2), and an insulator (5) is arranged at the lower end of the cathode water cooling jacket (2);
the cathode (1) is hollow, the top end of the cathode is closed, the lower end of the cathode is opened, and an opening is processed at the top end of the cathode to be used as a cathode gas inlet (8);
2. the cathode structure of claim 1, wherein: the cathode water cooling jacket (2) is a hollow cylinder with an opening at the bottom, a mounting hole is processed at the upper end face, the upper end of the cathode (1) is positioned in the mounting hole, the main body of the cathode (1) is positioned in the cathode water cooling jacket (2), and the bottom of the cathode (1) is hermetically connected with the opening at the bottom of the cathode water cooling jacket (2).
3. A controlled arc spot tube cathode structure as claimed in claim 2, wherein: the cathode water cooling jacket (2) is characterized in that a certain gap is formed between the inner wall of the cathode water cooling jacket (2) and the surface of the cathode (1), the gap is a cooling water channel, and a cathode cooling water inlet and outlet (7) and a cathode cooling water outlet (3) are machined on the cathode water cooling jacket (2).
4. The cathode structure of claim 1, wherein: the number of turns of the magnetic field coil (4) is 250-300.
5. The cathode structure of claim 1, wherein: the height of the cathode (1) is 150-170 mm, and the radius is 8-12 mm.
6. The cathode structure of claim 1, wherein: the magnetic field coil (4) is connected with a power supply (6).
7. The cathode structure of claim 6, wherein: the output current of the power supply (6) is 8-12A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838832.5U CN211509401U (en) | 2019-10-29 | 2019-10-29 | Controllable arc spot tube type cathode structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838832.5U CN211509401U (en) | 2019-10-29 | 2019-10-29 | Controllable arc spot tube type cathode structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211509401U true CN211509401U (en) | 2020-09-15 |
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ID=72407786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921838832.5U Active CN211509401U (en) | 2019-10-29 | 2019-10-29 | Controllable arc spot tube type cathode structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211509401U (en) |
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2019
- 2019-10-29 CN CN201921838832.5U patent/CN211509401U/en active Active
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