Lightweight plasma torch cathode

Abstract

The utility model relates to the technical field of plasma, in particular to a light-weight plasma torch cathode which comprises a cathode base and an ablation body, the cathode base is composed of a straight pipe part and a conical part, and the straight pipe part is located on the left side; a fixing thread, a sealing ring groove and a positioning spigot are sequentially arranged on the outer surface of the straight pipe part from left to right; the ablation body is connected to the conical part in a brazed mode. The ablation body is a cylindrical body, and one end of the ablation body is a plane and is flush with the end face of the outer side of the conical part; the other end of the ablation body is designed into a spherical surface and is positioned in the cathode base; a containing hole is formed in the middle of the plane end of the ablation body, and a high-melting-point metal rod is arranged in the containing hole. The cathode is compact in design, the size of the plasma torch cathode is remarkably reduced, the running temperature of the cathode can be effectively reduced, the service life is prolonged, and the long-term running cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma, in particular to a lightweight plasma torch cathode. Background Art

[0002] Plasma technology, due to its unique physical and chemical properties, has been widely used in industry. As a key device for generating plasma, the structural design and material selection of the plasma torch play a decisive role in the efficiency and stability of the entire system. However, due to its complex structure and material limitations, traditional plasma torches are typically heavy, which increases the difficulty and cost of maintenance over long periods of use.

[0003] In industrial applications, lightweight plasma torch designs not only reduce operator workload but also improve equipment flexibility and responsiveness. However, this lightweight design must be achieved without sacrificing the torch's lifespan and reliability. As a core component of a plasma torch, the cathode's performance and durability are directly related to the overall performance and economic viability of the plasma generator. Therefore, developing a cathode that is both lightweight and has a long lifespan and high reliability is crucial for improving the overall performance of a plasma torch. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a lightweight plasma torch cathode.

[0005] The technical solution of the utility model is: a lightweight plasma torch cathode, comprising a cathode base and an ablation body, the cathode base consisting of a straight tube portion and a tapered portion, and the straight tube portion is located on the left side; a fixing thread, a sealing ring groove and a positioning stop are sequentially provided on the outer surface of the straight tube portion from left to right; the ablation body is brazed and connected to the tapered portion; the ablation body is a columnar body, one end of the ablation body is a plane, and is kept flush with the outer end surface of the tapered portion; the other end of the ablation body is designed as a spherical surface, and is located inside the cathode base; a receiving hole is provided in the middle of the flat end of the ablation body, and a high-melting-point metal rod is provided in the receiving hole.

[0006] Furthermore, the nominal diameter of the fixing thread is 30mm or 36mm. This can adapt to different installation requirements. The sealing ring groove located on the right side of the fixing thread is used to install the O-ring 3 to ensure the sealing of the water cooling system.

[0007] Furthermore, the height of the positioning stop is 1-5 mm. The positioning stop is not only used to position the cathode, but also to increase the structural strength and conductive area of the cathode base.

[0008] Furthermore, a spanner hole is provided on the right side of the positioning stop on the straight pipe portion, so as to facilitate the disassembly and assembly of the cathode using a matching hook spanner.

[0009] Furthermore, the length of the conical portion of the cathode base ranges from 6 to 14 mm, and the angle a of the conical portion ranges from 50° to 90°. This design can ensure that the cathode base is tightly connected to the ablator, making the structure more compact, saving space, and reducing the volume.

[0010] Furthermore, the cathode base is made of copper or copper alloy; and the ablation body is made of silver or silver alloy.

[0011] Furthermore, the high melting point metal rod is made of one or more of tungsten, zirconium and hafnium.

[0012] Furthermore, the outer end of the metal rod is flush with the plane end of the ablator.

[0013] Furthermore, the inner diameter of the straight tube portion is 20-27 mm; the total length of the cathode is 30-50 mm, and the maximum diameter is 32-40 mm. This reduces the volume without compromising the cathode cooling effect, thereby increasing the cathode's service life. Preferably, the inner diameter of the straight tube portion is 25 mm; the total length of the cathode is 40 mm, and the maximum diameter is 38 mm.

[0014] Furthermore, the spherical end of the ablator is a water-cooled end surface. The spherical design increases the cooling area, facilitates the flow of cooling water, and thus improves the cooling efficiency.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The cathode in this application has a compact design, which significantly reduces the volume of the plasma torch cathode, not only reducing the weight of the entire torch, but also facilitating its integration and use in various industrial equipment;

[0017] 2. The cathode in this application eliminates dead spots during water cooling by optimizing relevant structures (for example, the end of the ablator adopts a spherical surface), effectively reducing the cathode operating temperature and significantly extending its service life. At the same time, the use of high-performance materials and sophisticated manufacturing processes further enhances the durability of the cathode, reduces the need for maintenance and replacement, and thus reduces long-term operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the cathode longitudinal section in Example 1 of the present utility model;

[0019] Figure 2 This is a schematic diagram of the cathode installation structure in Example 1 of the present utility model;

[0020] In the figure: 1. cathode base; 11. straight pipe; 111. fixing thread; 112. sealing ring groove; 113. positioning stop; 114. wrench hole; 12. tapered portion; 2. ablation body; 21. spherical surface; 3. high-melting-point metal rod; 4. cathode return pipe; 5. cathode inlet pipe; 6. O-ring. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to specific embodiments. In the description of the present invention, the terms "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0022] Example 1

[0023] like Figure 1 As shown, this embodiment is a lightweight plasma torch cathode comprising a cathode base 1 and an ablator 2. The cathode base 1 consists of a straight tube portion 11 and a tapered portion 12, with the straight tube portion 11 located on the left. The outer surface of the straight tube portion 11 is provided with a fixing thread 111, a sealing ring groove 112, and a positioning stop 113, from left to right. The ablator 2 is brazed to the middle portion of the tapered portion 12. The ablator 2 is cylindrical, with one end being flat and flush with the outer end surface of the tapered portion 12. The other end of the ablator 2 is designed as a spherical surface 21, which is located within the inner cavity of the cathode base 1 and serves as a water-cooled end surface. The spherical surface design increases the cooling area, facilitates the flow of cooling water, and improves cooling efficiency. A receiving hole is provided in the middle of the flat end of the ablator 2, in which a high-melting-point metal rod 3 is positioned.

[0024] In this embodiment, the nominal diameter of the fixing thread 111 is 30 mm. The sealing ring groove 112 on the right side of the fixing thread 111 can be used to install the O-ring 6 to ensure the sealing of the water cooling system.

[0025] In this embodiment, the height of the positioning stop 113 is 1 mm. The positioning stop 113 is not only used to position the cathode, but also can increase the structural strength and conductive area of the cathode base 1.

[0026] In this embodiment, a wrench hole 114 is provided on the straight tube portion 11 on the right side of the positioning stop 113 to facilitate the use of a matching hook wrench to disassemble and assemble the cathode.

[0027] In this embodiment, the length of the tapered portion 12 of the cathode base 1 is 6 mm, and the angle a of the tapered portion 12 is 50°. This design can ensure that the cathode base 1 is tightly connected to the ablator 2, making the structure more compact, saving space, and reducing the volume.

[0028] In this embodiment, the cathode base 1 is made of copper or copper alloy, the ablating body 2 is made of silver or silver alloy, and the high melting point metal rod 3 is made of tungsten. The outer end of the metal rod is flush with the flat end of the ablating body 2 after installation.

[0029] In this embodiment, the inner diameter of the straight tube portion 11 is 20 mm; the total length of the cathode is 30 mm, and the maximum diameter is 32 mm. This can reduce the volume without affecting the cooling effect of the cathode, thereby increasing the service life of the cathode.

[0030] As attached Figure 2 As shown, during actual installation and use, the cathode of this embodiment is fixedly connected to the cathode return pipe 4 via a fixing thread 111. The cooling water circulation system directs cooling water into the cathode via the cathode inlet pipe 5, thereby cooling the cathode. The cooling water flows through the spherical surface 21 of the ablator 2. Due to the large contact area between the spherical surface 21 and the cooling water, the cooling efficiency is high. After the cooling water has completed its cooling function, it can flow out through the interlayer formed by the cathode inlet pipe 5, the inner cavity of the cathode base 1, and the cathode return pipe 4, thus completing the entire cooling cycle.

[0031] In some other embodiments, the height of the positioning stop 113 may be 5 mm, the length of the tapered portion 12 may be 14 mm, the angle a of the tapered portion 12 may be 90°; the inner diameter of the straight tube portion 11 is 27 mm; the total length of the cathode is 50 mm, and the maximum diameter is 40 mm.

[0032] The above are only some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have combinations and variations of the aforementioned technical features. Without departing from the spirit and scope of the present invention, those skilled in the art can improve, modify, or replace the present invention with equivalents, or apply the structure or method of the present invention to other fields to achieve the same effect, which all fall within the scope of protection included in the present invention.

Claims

1. A lightweight plasma torch cathode, comprising a cathode base and an ablator, characterized in that: The cathode base consists of a straight tube portion and a tapered portion, and the straight tube portion is located on the left side; a fixing thread, a sealing ring groove and a positioning stop are arranged on the outer surface of the straight tube portion from left to right in sequence; the ablation body is brazed and connected to the tapered portion; the ablation body is a columnar body, one end of the ablation body is flat and flush with the outer end surface of the tapered portion; the other end of the ablation body is designed as a spherical surface and is located inside the cathode base; a receiving hole is provided in the middle of the flat end of the ablation body, and a high-melting-point metal rod is provided in the receiving hole.

2. The lightweight plasma torch cathode according to claim 1, characterized in that: The nominal diameter of the fixing thread is 30 mm or 36 mm.

3. The lightweight plasma torch cathode according to claim 1, characterized in that: The height of the positioning stop is 1-5 mm.

4. The lightweight plasma torch cathode according to claim 1, characterized in that: A wrench hole is provided on the straight pipe portion at the right side of the positioning stop.

5. The lightweight plasma torch cathode according to claim 1, characterized in that: The length of the conical portion of the cathode base is 6-14 mm, and the angle of the conical portion is 50°-90°.

6. The lightweight plasma torch cathode according to claim 1, characterized in that: The cathode base is made of copper or copper alloy; the ablative body is made of silver or silver alloy.

7. The lightweight plasma torch cathode according to claim 1, characterized in that: The high melting point metal rod is made of one or more of tungsten, zirconium and hafnium.

8. The lightweight plasma torch cathode according to claim 1, characterized in that: The inner diameter of the straight tube portion is 20-27 mm.

9. The lightweight plasma torch cathode according to claim 1, characterized in that: The total length of the cathode is 30-50 mm, and the maximum diameter is 32-40 mm.

10. The lightweight plasma torch cathode according to claim 1, characterized in that: The outer end of the high melting point metal rod is flush with the plane end of the ablator.

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