A cathode insulating sleeve for a plasma torch

Abstract

This invention provides a cathode insulating sleeve for a plasma torch, including an inlet sleeve and a cathode adjusting nut for mounting the cathode. The cathode adjusting nut has a first internal thread on its inner wall and is movably mounted inside the inlet sleeve. An inlet auxiliary ring is detachably mounted inside the inlet sleeve. This invention, through the cathode adjusting nut, the first internal thread, and the inlet auxiliary ring, allows for the fixing of the cathode adjusting nut during use via the inlet auxiliary ring. Furthermore, the first internal thread on the inner wall of the cathode adjusting nut enables fine axial adjustment of the cathode, allowing for flexible adjustment of the cathode position according to different operating conditions. This precisely controls the discharge gap between the cathode and anode, ensuring the stability and energy concentration of the plasma arc.

Description

Technical Field

[0001] This utility model relates to the field of plasma torch technology, and more specifically, to a cathode insulating sleeve for a plasma torch. Background Technology

[0002] In modern industrial production and scientific research, plasma torches, with their high temperature and high energy density, are widely used in many key fields such as material surface treatment, metal cutting and welding, semiconductor manufacturing, and chemical analysis. The working principle of a plasma torch is to ionize the working gas through a discharge process between the cathode and anode, forming a plasma arc, which in turn generates a high-temperature, high-energy plasma jet. The cathode insulating sleeve, as a crucial component protecting the cathode and guiding the working gas, directly affects the working efficiency, stability, and service life of the plasma torch through its structural design and performance.

[0003] Existing plasma torch cathode insulating sleeves cannot achieve precise adjustment of the cathode position during use. In practical applications, the axial position of the cathode cannot be flexibly adjusted according to different working requirements, affecting the stability and working effect of the plasma arc. Moreover, the existing insulating sleeve's gas inlet structure design is unreasonable, making it difficult for the gas to advance along the preset track after entering, resulting in uneven gas distribution. This not only reduces plasma generation efficiency but may also lead to instability in the plasma torch's operation. Therefore, this utility model proposes a new solution. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing plasma torch cathode insulating sleeves cannot achieve precise adjustment of the cathode position during use. In actual use, they cannot flexibly adjust the axial position of the cathode according to different working requirements, which affects the stability and working effect of the plasma arc. Moreover, the existing insulating sleeve has an unreasonable gas inlet structure design, making it difficult for the gas to move along the preset track after entering, resulting in uneven gas distribution. This not only reduces the plasma generation efficiency but may also lead to instability in the operation of the plasma torch. Therefore, this invention proposes a cathode insulating sleeve for plasma torches.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cathode insulating sleeve for the plasma torch is used to improve the above-mentioned problems.

[0007] The present invention is as follows:

[0008] The device includes an air intake sleeve and a cathode adjusting mounting nut for mounting a cathode. The inner wall of the cathode adjusting mounting nut has a first internal thread. The cathode adjusting mounting nut is movably mounted inside the air intake sleeve. An air intake auxiliary ring is detachably mounted inside the air intake sleeve. The top end of the air intake auxiliary ring abuts against the bottom of the cathode adjusting mounting nut. The air intake sleeve has a plurality of evenly distributed first air intake holes, and the air intake auxiliary ring has a plurality of evenly distributed second air intake holes. The plurality of first air intake holes and the plurality of second air intake holes are all arranged in a ring.

[0009] As a preferred technical solution of this utility model, the inner wall of the air intake sleeve is provided with an annular boss located above the first air intake hole, and the boss is used to limit the position of the top of the cathode adjustment mounting nut.

[0010] As a preferred technical solution of this utility model, the end face of the boss that contacts the cathode adjustment mounting nut is provided with a plurality of evenly distributed limiting holes.

[0011] As a preferred technical solution of this utility model, the end face of the cathode adjusting mounting nut is fixedly connected with a plurality of limiting rods that cooperate with the limiting holes.

[0012] As a preferred technical solution of this utility model, the inner wall of the air intake sleeve is provided with a second internal thread located below the first air intake hole, and the outer wall driven by the air intake auxiliary ring is provided with an external thread that cooperates with the second internal thread. The external thread is located below the second air intake hole, and the air intake sleeve and the cathode adjustment mounting nut are detachably connected through the external thread and the second internal thread.

[0013] As a preferred technical solution of this utility model, the bottom end of the intake auxiliary ring is provided with a plurality of grooves distributed in a ring.

[0014] As a preferred embodiment of this invention, both the air intake sleeve and the air intake auxiliary ring are made of insulating material.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the solution of this utility model:

[0017] 1. By setting up the cathode adjustment mounting nut, the first internal thread and the air intake auxiliary ring, the cathode adjustment mounting nut can be fixed by the air intake auxiliary ring during use. Then, the first internal thread on the inner wall of the cathode adjustment mounting nut can realize the fine adjustment of the cathode along the axial direction. The cathode position can be flexibly adjusted according to different working conditions, and the discharge gap between the cathode and the anode can be precisely controlled to ensure the stability and energy concentration of the plasma arc.

[0018] 2. By setting up an air intake sleeve, an air intake auxiliary ring, a first air intake hole, and a second air intake hole, multiple first air intake holes and multiple second air intake holes can not only make the gas evenly distributed during use, avoiding the occurrence of plasma inhomogeneity caused by excessively strong or weak local airflow, but also provide dual guidance for the gas, thereby forcing the gas to move along a preset trajectory after entering, improving the ionization efficiency of the plasma and the stability of the jet. Attached Figure Description

[0019] Figure 1 A schematic diagram of the assembly structure of the cathode insulating sleeve for the plasma torch provided by this utility model;

[0020] Figure 2 A schematic diagram showing the disassembly structure of the cathode insulating sleeve for the plasma torch provided by this utility model;

[0021] Figure 3 A schematic diagram of the air inlet sleeve structure for the cathode insulating sleeve of the plasma torch provided by this utility model;

[0022] Figure 4 A schematic diagram of the cathode adjustment and mounting nut structure of the cathode insulating sleeve for the plasma torch provided by this utility model;

[0023] Figure 5 The cathode insulating sleeve for plasma torch provided by this utility model Figure 1 Enlarged view of the structure at point A.

[0024] The image shows:

[0025] 1. Inlet sleeve; 2. Cathode adjustment mounting nut; 3. Inlet auxiliary ring; 4. First inlet hole; 5. First internal thread; 6. Second inlet hole; 7. External thread; 8. Second internal thread; 9. Groove; 101. Boss; 102. Limiting hole; 201. Limiting rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0027] like Figures 1-5As shown, this embodiment proposes a cathode insulating sleeve for a plasma torch, including an inlet sleeve 1 and a cathode adjusting mounting nut 2 for mounting the cathode. The inner wall of the cathode adjusting mounting nut 2 has a first internal thread 5. The cathode adjusting mounting nut 2 is movably installed inside the inlet sleeve 1. An inlet auxiliary ring 3 is detachably installed inside the inlet sleeve 1. The top end of the inlet auxiliary ring 3 abuts against the bottom of the cathode adjusting mounting nut 2. Through the arrangement of the cathode adjusting mounting nut 2, the first internal thread 5, and the inlet auxiliary ring 3, the cathode adjusting mounting nut 2 can be fixed in use by the inlet auxiliary ring 3. Furthermore, the first internal thread 5 on the inner wall of the cathode adjusting mounting nut 2 allows for fine axial adjustment of the cathode, enabling flexible adjustment of the cathode position according to different working conditions. The system precisely controls the discharge gap between the cathode and anode to ensure the stability and energy concentration of the plasma arc. Multiple evenly distributed first air inlets 4 are provided on the air inlet sleeve 1, and multiple evenly distributed second air inlets 6 are provided on the air inlet auxiliary ring 3. Both the first air inlets 4 and the second air inlets 6 are arranged in a ring. Through the arrangement of the air inlet sleeve 1, the air inlet auxiliary ring 3, the first air inlets 4, and the second air inlets 6, during use, the multiple first air inlets 4 and the multiple second air inlets 6 not only ensure uniform gas distribution, avoiding uneven plasma caused by excessively strong or weak local airflow, but also provide dual gas guidance, forcing the gas to advance along a preset trajectory after entering, thereby improving the ionization efficiency and jet stability of the plasma.

[0028] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, the inner wall of the air intake sleeve 1 is further provided with an annular boss 101 located above the first air intake hole 4. The boss 101 is used to limit the position of the top end of the cathode adjustment mounting nut 2. It should be noted that by setting the boss 101, the position of the top end of the cathode adjustment mounting nut 2 can be limited, thereby cooperating with the air intake auxiliary ring 3 to fix the cathode adjustment mounting nut 2.

[0029] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in a preferred embodiment, based on the above method, the end face of the boss 101 that contacts the cathode adjusting mounting nut 2 is further provided with a plurality of evenly distributed limiting holes 102, and the end face of the cathode adjusting mounting nut 2 is fixedly connected with a plurality of limiting rods 201 that cooperate with the limiting holes 102. It should be noted that the cooperation between the limiting holes 102 and the limiting rods 201 can form a circumferential positioning structure. When the cathode adjusting mounting nut 2 is installed in place, the limiting rods 201 will be inserted into the limiting holes 102, preventing the cathode adjusting mounting nut 2 from rotating and ensuring that the cathode remains stable.

[0030] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, the inner wall of the air intake sleeve 1 is further provided with a second internal thread 8 located below the first air intake hole 4, and the outer wall driven by the air intake auxiliary ring 3 is provided with an external thread 7 that cooperates with the second internal thread 8. The external thread 7 is located below the second air intake hole 6, and the air intake sleeve 1 and the cathode adjustment mounting nut 2 are detachably connected through the external thread 7 and the second internal thread 8. It should be noted that the air intake auxiliary ring 3 is connected to the second internal thread 8 of the air intake sleeve 1 through the external thread 7, which allows for quick disassembly and assembly. Moreover, when the air intake hole is blocked by impurities due to long-term use or the insulation material ages, it is not necessary to disassemble the entire plasma torch; only the air intake auxiliary ring 3 needs to be unscrewed for cleaning or replacement, reducing maintenance costs.

[0031] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, the bottom end of the intake auxiliary ring 3 is further provided with a plurality of annularly distributed grooves 9. It should be noted that the grooves 9 facilitate the installation or removal of the intake auxiliary ring 3 using a wrench.

[0032] like Figure 1 As shown, in a preferred embodiment, based on the above method, both the air inlet sleeve 1 and the air inlet auxiliary ring 3 are made of insulating material. It should be noted that the double-layer insulation structure improves the insulation between the cathode and anode, effectively ensuring the stable operation of the plasma torch.

[0033] Specifically, the working principle of the cathode insulating sleeve for this plasma torch is as follows: When in use, first install the cathode adjusting mounting nut 2 into the inside of the air inlet sleeve 1, so that the cathode adjusting mounting nut 2 abuts against the end face of the boss 101, and at the same time insert multiple limiting rods 201 into the limiting holes 102. Then, screw the air inlet auxiliary ring 3 into the inside of the air inlet sleeve 1 through the external thread 7 and the second internal thread 8, so that the top of the air inlet auxiliary ring 3 presses against the bottom end of the cathode adjusting mounting nut 2 to fix it. During use, the working gas will enter the inside of the air inlet auxiliary ring 3 evenly through multiple first air inlets 4 and multiple second air inlets 6, so that the gas is evenly distributed around the cathode.

[0034] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A cathode insulating sleeve for a plasma torch, characterized in that, The device includes an air intake sleeve (1) and a cathode adjustment mounting nut (2) for mounting the cathode. The cathode adjustment mounting nut (2) has a first internal thread (5) on its inner wall. The cathode adjustment mounting nut (2) is movably mounted inside the air intake sleeve (1). An air intake auxiliary ring (3) is detachably mounted inside the air intake sleeve (1). The top end of the air intake auxiliary ring (3) abuts against the bottom of the cathode adjustment mounting nut (2). The air intake sleeve (1) has multiple evenly distributed first air intake holes (4). The air intake auxiliary ring (3) has multiple evenly distributed second air intake holes (6). The multiple first air intake holes (4) and the multiple second air intake holes (6) are all arranged in a ring.

2. The cathode insulating sleeve for a plasma torch according to claim 1, characterized in that, The inner wall of the air intake sleeve (1) is provided with an annular boss (101) located above the first air intake hole (4), and the boss (101) is used to limit the position of the top of the cathode adjustment mounting nut (2).

3. The cathode insulating sleeve for a plasma torch according to claim 2, characterized in that, The end face of the boss (101) that contacts the cathode adjustment mounting nut (2) is provided with a plurality of evenly distributed limiting holes (102).

4. The cathode insulating sleeve for a plasma torch according to claim 3, characterized in that, The end face of the cathode adjusting mounting nut (2) is fixedly connected with a plurality of limiting rods (201) that cooperate with the limiting hole (102).

5. A cathode insulating sleeve for a plasma torch according to claim 1, characterized in that, The inner wall of the air intake sleeve (1) is provided with a second internal thread (8) located below the first air intake hole (4). The outer wall driven by the air intake auxiliary ring (3) is provided with an external thread (7) that cooperates with the second internal thread (8). The external thread (7) is located below the second air intake hole (6). The air intake sleeve (1) and the cathode adjustment mounting nut (2) are detachably connected through the external thread (7) and the second internal thread (8).

6. The cathode insulating sleeve for a plasma torch according to claim 1, characterized in that, The bottom end of the intake auxiliary ring (3) is provided with multiple grooves (9) arranged in a ring.

7. A cathode insulating sleeve for a plasma torch according to claim 1, characterized in that, Both the air intake sleeve (1) and the air intake auxiliary ring (3) are made of insulating material.

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