A new type of hand-held bent handle cutting torch

Abstract

A novel handheld curved-handle cutting torch includes a torch body, electrodes, and a protective sleeve. It also includes an independent and detachable gas core, a vortex ring, and a hollow vortex ring sleeve. The vortex ring sleeve is detachably installed at the front end of the torch body sleeve. The gas core and vortex ring are sequentially arranged in a cavity formed by the combination of the body sleeve and the vortex ring sleeve. A nozzle is positioned in front of the vortex ring sleeve. The protective sleeve is threaded to the front end of the torch body. Its inner end face integrally presses and fixes the nozzle, vortex ring sleeve, vortex ring, and gas core along the axial direction. Simultaneously, the conical surface of its front inner wall mates with the outer wall of the nozzle, achieving high-precision radial coaxial positioning of the nozzle. This invention designs consumables as independent modular components, allowing for individual replacement after damage, significantly reducing usage and maintenance costs. Furthermore, the reliable positioning structure ensures high coaxiality and improves cutting quality.

Description

Technical Field

[0001] This utility model relates to a novel handheld curved handle cutting torch. Background Technology

[0002] Plasma arc cutting is a machining method that uses the heat of a high-temperature plasma arc to locally melt (and evaporate) the metal at the workpiece's cut edge, and then uses the momentum of a high-speed plasma stream to remove the molten metal, thus forming a cut. The plasma torch is the core component for realizing this process, and its performance directly determines the cutting quality, efficiency, and operating costs.

[0003] In traditional plasma torch structures, a vortex ring with a tangential aperture is typically incorporated to guide the gas into a stable rotating flow that confines the arc. However, existing designs generally suffer from the following shortcomings:

[0004] 1. In many existing designs, the vortex ring is not a separate component but is integrated with the nozzle or gas core (gas distributor) as a whole. Both the vortex ring and the nozzle are consumable parts, especially in high-load cutting operations. When the relatively simple vortex ring fails, the user has to replace the entire expensive integrated nozzle or gas core assembly, which not only causes unnecessary waste but also significantly increases the user's usage and maintenance costs.

[0005] 2. In plasma cutting torches, the coaxiality among the electrode, vortex ring, and nozzle is crucial to the shape and stability of the plasma arc. In traditional split or partially integrated structures, the positioning of each component relies heavily on simple planar contact and radial clearance fit. Repeated disassembly and reassembly, or thermal expansion and contraction during operation, can easily lead to cumulative errors and decreased coaxiality. Poor coaxiality causes arc skew and energy discontinuity, resulting in a tilted cutting surface, increased slag buildup, and other problems, severely impacting cutting quality and potentially accelerating abnormal wear of the electrode and nozzle.

[0006] Therefore, how to design a new type of handheld curved handle cutting torch with a simple structure, precise positioning of each component, and independent replacement of vulnerable parts to reduce costs is a technical problem that urgently needs to be solved in this field. The technical background section of this utility model aims to describe the current status of the existing technical field. The shortcomings of the prior art indicate that the content of this section will provide necessary background information for understanding the technical contributions and innovations of this utility model. The signals disclosed in this background section are only intended to increase the understanding of the overall background of this utility model and should not be regarded as implying subjective intent in any form. Utility Model Content

[0007] In view of the above, the purpose of this utility model is to provide a new type of handheld curved handle cutting torch.

[0008] The technical solution adopted to achieve the purpose of this utility model is a novel handheld curved handle cutting torch, comprising a torch body consisting of a main body shell and a main body sleeve fixed inside therein, an electrode installed inside the torch body, and a protective sleeve connected to the front end of the torch body by threads; further comprising:

[0009] air core;

[0010] Independent and detachable vortex ring;

[0011] And a hollow vortex ring;

[0012] The inner wall of the body sleeve is an internal cavity that opens forward, and the outer wall of the front end of the body sleeve is provided with external threads;

[0013] The inner wall of the rear end of the vortex ring sleeve is provided with an internal thread that mates with the external thread of the body sleeve, and the vortex ring sleeve is detachably installed at the front end of the body sleeve through this threaded connection.

[0014] The air core and the vortex ring are sequentially arranged axially in the cavity formed by the combination of the body sleeve and the vortex ring sleeve;

[0015] The vortex ring is an annular disk structure with multiple through holes arranged tangentially. The vortex ring is located in front of the air core, and the rear end face of the vortex ring abuts against the front end face of the air core.

[0016] The front end of the cutting torch body is provided with an external thread. The protective sleeve is screwed into the front end of the cutting torch body through its internal thread and uses its inner end face to press and fix other components inside the cutting torch axially.

[0017] Furthermore, the electrode is a cylindrical structure with a central mounting hole extending through it along the axial direction; the gas core is a rod-shaped component installed in the central mounting hole of the electrode, and the gas core is provided with at least one gas channel for conveying plasma gas.

[0018] Furthermore, it also includes a nozzle, which is a hollow frustoconical structure with its internal cavity covering the outside of the working end of the electrode and coaxially spaced from the head of the electrode; the tail end face of the nozzle abuts against the front end face of the vortex ring.

[0019] Furthermore, the front end of the protective sleeve has an inwardly contracting inner wall that abuts against the outer conical surface of the nozzle. Thus, when the protective sleeve is tightened, the nozzle is radially coaxially positioned and axially pressed and fixed through the cooperation of the inner wall and the outer conical surface.

[0020] Furthermore, the air core, vortex ring, vortex ring sleeve, and nozzle are all independent components. They are stacked and fitted together in sequence along the axial direction of the electrode, and the axial compression and coaxial positioning of the whole are achieved through the threaded connection structure between the protective sleeve and the cutting torch body.

[0021] Furthermore, an annular groove is formed at the front end of the internal cavity of the vortex ring sleeve, the vortex ring is embedded in the annular groove, and radial limiting is achieved through the inner wall of the groove.

[0022] The beneficial effects of this utility model are:

[0023] 1. Significantly Reduced Usage and Maintenance Costs: This invention designs the air core, vortex ring, vortex ring sleeve, and nozzle as four completely independent, detachable, and replaceable components. This modular design allows the user to replace only the damaged individual component when any part (especially the vortex ring and nozzle, which are major consumables) wears or is damaged, instead of replacing the entire assembly. This greatly reduces spare parts costs and resource waste, bringing direct economic benefits to the user.

[0024] 2. Improved Cutting Quality and Stability: This invention features a unique dual coaxial positioning mechanism. First, by embedding the vortex ring into the annular groove at the front end of the vortex ring sleeve, the inner wall of the groove precisely limits the radial positioning of the vortex ring. Second, by cooperating between the inner conical surface of the protective sleeve and the outer conical surface of the nozzle, a strong radial centering force is generated while axially pressing, achieving high-precision automatic centering of the nozzle. This design ensures that the core channel from the electrode to the vortex ring and then to the nozzle remains highly coaxial, thereby forming a stable, straight, and energy-concentrated plasma arc, ultimately resulting in a smoother, more perpendicular cutting surface and extending the normal service life of consumables. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 yes Figure 1 A magnified view of part A;

[0028] In the diagram, 100-body shell, 101-body sleeve, 102-air core, 103-vortex ring, 104-vortex ring sleeve, 105-electrode, 106-nozzle, 107-protective sleeve, 108-cavity, 109-thread. Detailed Implementation

[0029] The present invention will now be described in this embodiment with reference to the accompanying drawings and some embodiments.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0031] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates the novel handheld curved handle cutting torch of this utility model, aiming to help understand the technical concept and specific implementation of this utility model. However, this description should not be construed as a limitation on the scope of protection of this utility model.

[0032] See Figure 1 As shown, the plasma cutting torch of this embodiment mainly includes: a cutting torch body, an electrode installed inside the cutting torch body, a gas core, a vortex ring, a vortex ring sleeve, a nozzle, and a protective sleeve.

[0033] The torch body consists of a main body shell and a body sleeve fixed inside it. The front end of the electrode is the working end, used to generate a plasma arc.

[0034] Unlike existing technologies, the air core, vortex ring, vortex ring sleeve, and nozzle in this embodiment are all structurally independent components. This modular design allows for individual replacement of any component (especially the vulnerable vortex ring or nozzle) when it is damaged or worn, without having to replace the entire integrated assembly, thus significantly reducing usage and maintenance costs.

[0035] Specifically, the inner wall of the main body sleeve forms a forward-opening internal cavity to accommodate and position electrodes and other core components. Simultaneously, external threads are machined on the front outer wall of the main body sleeve. The eddy current ring sleeve is a hollow cylindrical or stepped component, with internal threads on its rear inner wall that match the external threads of the main body sleeve. Through the engagement of these threads, the eddy current ring sleeve can be easily and detachably installed at the front end of the main body sleeve, thereby extending and sealing the internal cavity.

[0036] During assembly, the air core and vortex ring are placed sequentially along the central axis of the torch within the cavity formed by the body sleeve and the vortex ring sleeve. The vortex ring is an independent annular disc structure with multiple tangentially arranged through holes. These tangential through holes are key structural elements for generating the rotating airflow. The vortex ring is positioned in front of the air core, with its rear end face directly abutting against the front end face of the air core.

[0037] To further ensure the installation accuracy and stability of the vortex ring, in this preferred embodiment, the front end of the internal cavity of the vortex ring sleeve is designed as an annular groove. During assembly, the vortex ring fits precisely into this annular groove and is radially restrained by the inner wall (i.e., the radial wall) of the groove. This structure ensures that the vortex ring maintains a precise coaxial position even under gas impact, providing a guarantee for the formation of a stable and concentrated plasma arc.

[0038] The electrode is preferably a cylindrical structure with a central mounting hole extending axially through its interior. The gas core is correspondingly designed as a rod-shaped component, its outer diameter fitting into the central mounting hole of the electrode for a tight fit. To deliver the plasma gas, the gas core has one or more axial or helical gas channels.

[0039] The nozzle is a hollow, frustoconical metal component. Its internal cavity, after installation, covers the working end of the electrode and maintains a precise, coaxial annular gap with the electrode head. This gap forms a compression channel for the plasma arc. In the axial position, the tail end face of the nozzle abuts against the front end face of the vortex ring.

[0040] The front end of the torch body has external threads, while the protective sleeve has corresponding internal threads. The protective sleeve is screwed onto the front end of the torch body via these threads. When the protective sleeve is tightened, its inner end face sequentially presses against the nozzle, vortex ring sleeve, vortex ring, and air core along the axial direction, firmly pressing these individual components onto the torch body. This structure, which achieves overall axial compression through a single protective sleeve, greatly simplifies the assembly and disassembly process.

[0041] To achieve high-precision coaxial positioning of the nozzle, the inner wall of the front end of the protective sleeve is designed as an inwardly tapered surface. Correspondingly, the outer wall of the nozzle is an outer tapered surface. When the protective sleeve is tightened, its inner tapered surface makes surface contact with the outer tapered surface of the nozzle, generating a strong radial force. This radial force automatically aligns the nozzle with the central axis, ensuring coaxiality between the nozzle and the electrode, which is crucial for achieving high-quality cutting results.

[0042] In summary, the assembly sequence of this embodiment is clear and explicit: the electrode is fixed to the torch body, the vortex ring is placed into the groove of the vortex ring sleeve, the gas core and electrode are installed in sequence, the vortex ring sleeve is screwed onto the body sleeve, the nozzle is then placed against the front end of the vortex ring sleeve, and finally, all components are tightened and fixed at once with the protective sleeve. The entire process achieves overall axial compression and high-precision coaxial positioning of independent components such as the gas core, vortex ring, vortex ring sleeve, and nozzle.

[0043] The working process of the plasma cutting torch in this embodiment is as follows: The working gas (plasma gas) is introduced through the air inlet at the rear end of the torch body. It first enters the chamber formed by the inner wall of the body sleeve and the outer wall of the electrode for pre-distribution. Then, it is guided to the front end of the electrode through the gas channel on the gas core and enters the space between the front end of the electrode and the rear surface of the vortex ring. Finally, the gas is forced to pass through multiple tangential through holes on the vortex ring at high speed, thereby forming a high-speed rotating vortex. This rotating airflow is ejected in a spiral manner into the internal cavity of the nozzle, effectively confining, cooling and stabilizing the electric arc generated by the electrode, and finally forming a highly concentrated plasma arc, which is ejected from the central hole at the front end of the nozzle to achieve the cutting operation.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, several simple deductions or substitutions can be made without departing from the spirit and principles of the present invention, and all such modifications or substitutions should be considered within the scope of protection of the present invention.

[0045] The specific embodiments described herein are merely illustrative and do not limit the scope of protection of this utility model. Various changes and modifications can be made to the specific embodiments of this utility model without departing from its spirit and essence. All such changes and modifications fall within the scope of this utility model.

[0046] It is worth noting that in the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection. The circuits described in this utility model are all commonly used circuits in the art, and other related components are all commonly used existing components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel handheld curved-handle cutting torch, comprising a torch body consisting of a main body shell and a main body sleeve fixed inside therein, an electrode installed inside the torch body, and a protective sleeve threadedly connected to the front end of the torch body; characterized in that, Also includes: air core; Independent and detachable vortex ring; And a hollow vortex ring; The inner wall of the body sleeve is an internal cavity that opens forward, and the outer wall of the front end of the body sleeve is provided with external threads; The inner wall of the rear end of the vortex ring sleeve is provided with an internal thread that mates with the external thread of the body sleeve, and the vortex ring sleeve is detachably installed at the front end of the body sleeve through this threaded connection. The air core and the vortex ring are sequentially arranged axially in the cavity formed by the combination of the body sleeve and the vortex ring sleeve; The vortex ring is an annular disk structure with multiple through holes arranged tangentially. The vortex ring is located in front of the air core, and the rear end face of the vortex ring abuts against the front end face of the air core. The front end of the cutting torch body is provided with an external thread. The protective sleeve is screwed into the front end of the cutting torch body through its internal thread and uses its inner end face to press and fix other components inside the cutting torch axially.

2. The novel handheld curved-handle cutting torch according to claim 1, characterized in that: The electrode is a cylindrical structure with a central mounting hole extending through it along the axial direction. The gas core is a rod-shaped component installed in the central mounting hole of the electrode, and the gas core has at least one gas channel for conveying plasma gas.

3. The novel handheld curved-handle cutting torch according to claim 1, characterized in that: It also includes a nozzle, which is a hollow frustoconical structure with its internal cavity covering the outside of the working end of the electrode and coaxially spaced from the head of the electrode; the tail end face of the nozzle abuts against the front end face of the vortex ring.

4. The novel handheld curved-handle cutting torch according to claim 3, characterized in that: The front end of the protective sleeve has an inwardly contracting inner wall that abuts against the outer conical surface of the nozzle. Thus, when the protective sleeve is tightened, the inner wall and the outer conical surface cooperate to achieve radial coaxial positioning and axial compression and fixation of the nozzle.

5. The novel handheld curved-handle cutting torch according to claim 4, characterized in that: The air core, vortex ring, vortex ring sleeve, and nozzle are all independent components. They are stacked and fitted together in sequence along the axial direction of the electrode, and the axial compression and coaxial positioning of the whole are achieved through the threaded connection structure between the protective sleeve and the cutting torch body.

6. The novel handheld curved-handle cutting torch according to claim 1, characterized in that: The front end of the internal cavity of the vortex ring is formed with an annular groove. The vortex ring is embedded in the annular groove and is radially limited by the inner wall of the groove.

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