CN214046103U

CN214046103U - Plasma generator cathode

Info

Publication number: CN214046103U
Application number: CN202120262046.6U
Authority: CN
Inventors: 崔志恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-30
Filing date: 2021-01-30
Publication date: 2021-08-24
Anticipated expiration: 2031-01-30

Abstract

The utility model discloses a plasma generator cathode, which comprises a matrix and an emitter; the base body is in a container shape with one end open and the other end closed, the base body is in an integrated structure, and an inner cavity of the base body is used for accommodating a cooling medium; the emitter is arranged on the outer surface of the closed end of the matrix. The utility model discloses a base member of integral type, the emitter is installed in the outside of blind end, and the emitter does not communicate with the base member inner chamber and does not have the seam that contacts with coolant to eliminated leakage hidden danger, also simplified the structure simultaneously, reduced manufacturing cost.

Description

Plasma generator cathode

Technical Field

The utility model relates to a cathode of a direct current plasma generator.

Background

The plasma generator is applied to various fields, has wide application in the fields of power generation and environmental protection, and has wide requirements on prolonging the service life of a cathode in use. In order to increase the service life of the cathode, various structures of the cathode have been proposed in the prior art.

For example, chinese patent publication No. CN 207835895U discloses a plasma generator cathode. As shown in fig. 1, the heat-conducting device comprises a base, a heat-conducting member, an emitter and the like, wherein the base and the heat-conducting member form a base body, and the emitter is arranged in the heat-conducting member.

However, the plasma cathode operates in a high temperature environment with a large current. To prevent exceeding the maximum operating temperature allowed by the material constituting the cathode, it is necessary to cool the cathode with a medium such as water in the inner cavity. Cathode leakage is the primary failure mode of the cathode. The cathode with the split-type inner cavity structure disclosed in the above-mentioned chinese patent has poor seam sealing performance due to the split-type structure, and on the other hand, at high temperature, different materials have different expansion amounts, and a gap is easily formed to cause leakage, and problems such as decrease in electrical conductivity and thermal conductivity of the cathode are caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a plasma generator cathode, its purpose: the hidden trouble of leakage is solved.

The utility model discloses technical scheme as follows:

a plasma generator cathode comprising a substrate and an emitter;

the base body is in a container shape with one end open and the other end closed, the base body is in an integrated structure, and an inner cavity of the base body is used for accommodating a cooling medium;

the emitter is arranged on the outer surface of the closed end of the matrix.

As a further improvement of the device: a boss is arranged on the inner wall of the closed end of the base body, and the boss and the inner side wall of the base body form an annular cavity; the projectile is inserted into the boss from the outside.

As a further improvement of the device: the outer edge of the closed end of the base body is chamfered.

As a further improvement of the device: and one end of the opening of the base body is provided with a threaded interface, the threaded interface is used for being connected with a connecting pipe, and the connecting pipe is used for conveying a cooling medium to the inner cavity of the base body.

As a further improvement of the device: the emitter is embedded on the substrate.

As a further improvement of the device: the emitter is connected with the base body in a threaded connection mode, a riveting mode, an interference shaft hole matching mode or a welding mode.

As a further improvement of the device: the matrix is cylindrical, and the emitter is located in the central area of the outer surface of the closed end of the matrix.

Compared with the prior art, the utility model discloses following beneficial effect has: (1) the device adopts an integrated matrix, the emitter is arranged on the outer side of the closed end, the emitter is not communicated with the inner cavity of the matrix and has no seam contacted with a cooling medium, thereby eliminating the hidden trouble of leakage, simplifying the structure and reducing the production cost; (2) the emitter is embedded into the boss from the outer side, and the boss and the inner wall of the matrix form an annular cavity, so that the inner space of the matrix is fully utilized, the cooled area of the emitter is increased, and the cooling effect is improved; (3) the outer side of the closed end of the base body is provided with a chamfer angle, which is favorable for arc striking.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical scheme of the utility model is explained in detail below with the attached drawings:

referring to fig. 1, a plasma generator cathode includes a substrate 1 and an emitter 2.

The base body 1 is in a container shape with one end open and the other end closed. In this embodiment, the base 1 is cylindrical, and other structures such as a cone, a rectangular parallelepiped, and a prism may be adopted. The interior of the base body 1 serves to receive a cooling medium. The whole base body 1 is an integral structure and is made of metal materials.

The emitter 2 is 0.5 mm-30 mm in size and is arranged on the outer surface of the closed end of the matrix 1. Preferably, the emitter 2 is embedded on the substrate 1. The emitter 2 is connected with the matrix 1 in a threaded connection mode, a riveting mode, an interference shaft hole fit mode or a welding mode.

Furthermore, a boss is arranged on the inner wall of the closed end of the base body 1, and the boss and the inner side wall of the base body 1 form an annular cavity 3; the emitter 2 is located in the central region of the outer surface of the closed end of the substrate 1, and is embedded into the boss from the outside. The structure not only makes full use of the internal space of the matrix 1, but also increases the cooled area of the emitter 2 and improves the cooling effect.

Obviously, the positions of the emitter 2 and the boss can also be eccentrically arranged as desired.

The outer edge of the closed end of the base body 1 is also provided with a chamfer 5, so that arc striking is facilitated.

The cooling device is characterized in that a threaded connector 4 is arranged at one end of an opening of the base body 1, the threaded connector 4 is used for being connected with a connecting pipe, and the connecting pipe is used for conveying a cooling medium to an inner cavity of the base body 1.

When the cooling device works, a cooling medium enters the inner cavity of the matrix 1 through the connecting pipe to cool the emitter 2. Because the closed end of the matrix 1 thoroughly isolates the inner cavity of the matrix 1 from the emitter 2 and the closed end has no seam, even if the matrix 1 expands and contracts due to temperature change, a cooling medium cannot be leaked to the emitter 2, the leakage hidden danger caused by the seam is thoroughly eliminated, and the ablation resistance of the cathode is ensured.

Claims

1. A plasma generator cathode, comprising: comprises a matrix (1) and an emitter (2);

the base body (1) is in a container shape with one open end and the other closed end, the base body (1) is in an integrated structure, and an inner cavity of the base body (1) is used for containing a cooling medium;

the emitter (2) is arranged on the outer surface of the closed end of the matrix (1).

2. The plasma generator cathode according to claim 1, wherein: a boss is arranged on the inner wall of the closed end of the base body (1), and the boss and the inner side wall of the base body (1) form an annular cavity (3); the emitter (2) is inserted into the projection from the outside.

3. The plasma generator cathode according to claim 1, wherein: the outer edge of the closed end of the base body (1) is provided with a chamfer (5).

4. The plasma generator cathode according to claim 1, wherein: the cooling device is characterized in that one end of an opening of the base body (1) is provided with a threaded connector (4), the threaded connector (4) is used for being connected with a connecting pipe, and the connecting pipe is used for conveying a cooling medium to an inner cavity of the base body (1).

5. The plasma generator cathode according to claim 1, wherein: the emitter (2) is embedded on the substrate (1).

6. The plasma generator cathode according to claim 5, wherein: the emitter (2) is connected with the base body (1) in a threaded connection mode, or a riveting mode, or an interference shaft hole fit mode, or a welding mode.

7. The plasma generator cathode according to any of claims 1 to 6, wherein: the matrix (1) is cylindrical, and the emitter (2) is located in the central area of the outer surface of the closed end of the matrix (1).