Plasma cutting gun head

Abstract

The utility model relates to the field of plasma cutting, and discloses a plasma cutting gun head which comprises a nozzle body, an electrode body is arranged in an inner cavity of the nozzle body, an anti-burning head is arranged in an inner cavity of the top of the nozzle body, and a plurality of air guide grooves are evenly and obliquely formed in the bottom of an inner cavity of the anti-burning head. A rotating groove is formed in the top of the inner cavity wall of the nozzle body, an inner cavity of the rotating groove is rotationally connected with a rotating ring, a plurality of exhaust hole channels are formed in the top of the anti-burning head, and the nozzle body is sleeved with a protection cylinder. The anti-burning head is driven to rotate rapidly under the action of the rotating ring outside the anti-burning head in the rotating groove, part of high-pressure airflow enters the exhaust hole channel under the action of the air guide slope and is exhausted, an air wall is formed in cooperation with the rotating anti-burning head, the nozzle is effectively prevented from being scraped by electric arcs, and the service life of the nozzle is prolonged. The plasma cutting gun head solves the problem that an existing plasma cutting gun head is prone to being scraped by an electric arc to cause head burning.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma cutting, in particular to a plasma cutting gun head. Background Art

[0002] A plasma cutting gun is a processing method that uses the heat of a high-temperature plasma arc to locally melt the metal at the workpiece cutting edge and discharges the molten metal by means of the momentum of the high-speed plasma to form a cut. It is widely used because of its advantages such as fast cutting speed, high cutting accuracy, easy setting of cutting conditions, easy realization of automation and unmanned operation, and relatively low cost.

[0003] The patent with the publication number CN220480521U discloses a plasma cutting gun head structure, which includes a nozzle with an electrode disposed therein; a burn-proof extension head disposed on the nozzle, the burn-proof extension head is provided with an extension portion extending out of the nozzle and a thickening portion, and a triangular connection portion is disposed between the extension portion and the thickening portion. This device utilizes the burn-proof extension head. After the burn-proof extension head is installed on the nozzle, the air flow will spray out along the burn-proof extension head to play a role in guiding the air flow, preventing the phenomenon of head burning caused by the inclined blowing of the air flow. And when the arc is blown crooked and scratched by the air flow, it will first scratch the extension portion, causing the extension portion to heat up and glow, so as to be discovered in time. There are also provided an inclined air duct and an arc groove to play a role in guiding the high-pressure air flow, reducing the probability of the arc being blown crooked by the air flow;

[0004] However, this device sprays the high-pressure air flow along the nozzle, and then sprays out the arc between the motor and the nozzle for cutting. During the process, the burn-proof extension head is used to guide the air flow, so as to prevent the arc from being blown out by the high-pressure air flow and scratching the nozzle. However, the position of the burn-proof nozzle responsible for guiding the air flow in this plasma cutting gun head is fixed. It is difficult to protect the nozzle only by the air flow in the same direction sprayed out from the inner wall of the burn-proof extension head. Therefore, there is still a large phenomenon of the arc being blown crooked and burning the head. For this reason, a plasma cutting gun head is proposed to solve the problem of the existing phenomenon of the arc scratching the gun head and causing head burning. Summary of the Utility Model

[0005] (1) Technical Problem to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a plasma cutting gun head, which solves the above problems.

[0007] (2) Technical Solution

[0008] To achieve the above object, the present utility model provides the following technical solution: A plasma cutting torch head, including a nozzle body, an electrode body is arranged in the inner cavity of the nozzle body, an anti-burning head is arranged in the top inner cavity of the nozzle body, a plurality of air guiding grooves are evenly and obliquely arranged at the bottom of the inner cavity of the anti-burning head, a rotating groove is arranged at the top of the inner cavity wall of the nozzle body, a rotating ring is rotatably connected in the inner cavity of the rotating groove, a plurality of exhaust duct holes are arranged at the top of the anti-burning head, a protective cylinder is sleeved outside the nozzle body, a protective cover is arranged at the top of the protective cylinder, a temperature reduction mechanism is arranged on the inner wall of the protective cylinder, a wind guiding and protecting mechanism is arranged in the top inner cavity of the protective cover, and a wind guiding slope is arranged at the position corresponding to the exhaust duct holes at the bottom of the anti-burning head.

[0009] Preferably, the rotating ring is fixedly connected with the anti-burning head, and the rotating ring and the rotating groove are very smooth.

[0010] Preferably, the protective cylinder is made of a material with good heat conduction performance.

[0011] Preferably, the temperature reduction mechanism includes an annular pipe arranged on the inner wall of the protective cylinder, a plurality of air guiding pipes are interconnected at the top of the annular pipe, and an air inlet pipe is interconnected on one side of the outer ring of the annular pipe.

[0012] Preferably, the air guiding pipe penetrates through the top of the protective cylinder and communicates with the inner cavity of the protective cover, and the air inlet pipe penetrates through the inner cavity wall of the protective cylinder.

[0013] Preferably, the wind guiding and protecting mechanism includes a wind guiding ring fixed on the top of the inner cavity of the nozzle body, a wind guiding ring groove is arranged at the top of the wind guiding ring, a plurality of air inlet slots are arranged at the outer circle of the bottom of the wind guiding ring, and the wind guiding ring groove and the air inlet slots.

[0014] Preferably, a plurality of ball grooves are arranged at the top of the inner cavity of the rotating groove, and balls are arranged in the inner cavities of the ball grooves.

[0015] (III) Beneficial effects

[0016] 1. For this plasma cutting torch head, the high-pressure air flow passes through the plurality of inclined air guiding grooves on the anti-burning head, and drives the anti-burning head to rotate rapidly under the action of the rotating ring outside the anti-burning head in the rotating groove. And part of the high-pressure air flow enters the exhaust duct holes and is discharged under the action of the wind guiding slope, and forms a wind wall in cooperation with the rotating anti-burning head, effectively protecting the nozzle from being scratched by the electric arc, and solving the problem that the existing plasma cutting torch head is easily scratched by the electric arc and causes the burning of the head.

[0017] 2. For this plasma cutting torch head, air is cooled by an external device and introduced into the annular pipe through the air inlet pipe, and then passes through the air guide pipe to cool the protective cylinder. Moreover, the air in the air guide pipe blows towards the air guide ring at the top of the protective cover cavity, enters through the air inlet notch, converges in the air guide ring groove and sprays out vertically and evenly. While taking away the heat at the top of the nozzle body, a wind wall is formed again to block impurities such as dust, improving the heat dissipation effect of this plasma cutting torch head. Brief Description of the Drawings

[0018] Figure 1 It is a structural diagram of the present utility model;

[0019] Figure 2 It is a schematic diagram of the anti-burning head structure of the present utility model;

[0020] Figure 3 It is a structural diagram of the present utility model;

[0021] Figure 4 It is the structure of the present utility model Figure 3 The enlarged view of part A in the figure.

[0022] In the figure: 1. Nozzle body; 2. Electrode body; 3. Anti-burning head; 4. Air guide groove; 5. Rotating groove; 6. Rotating ring; 7. Exhaust duct; 8. Protective cylinder; 9. Protective cover; 10. Cooling mechanism; 101. Annular pipe; 102. Air guide pipe; 103. Air inlet pipe; 11. Air guide and protection mechanism; 111. Air guide ring; 112. Air guide ring groove; 113. Air inlet notch; 12. Ball groove; 13. Ball; 14. Air guide slope. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment: Please refer to Figures 1-4, a plasma cutting torch head, comprising a nozzle body 1, an electrode body 2 is arranged in the inner cavity of the nozzle body 1, an anti-burning head 3 is arranged in the top inner cavity of the nozzle body 1, a plurality of air guiding grooves 4 are evenly and obliquely arranged at the bottom of the inner cavity of the anti-burning head 3, a rotating groove 5 is arranged at the top of the inner cavity wall of the nozzle body 1, a rotating ring 6 is rotatably connected in the inner cavity of the rotating groove 5, a plurality of exhaust duct holes 7 are arranged at the top of the anti-burning head 3, a protective cylinder 8 is sleeved outside the nozzle body 1, a protective cover 9 is arranged at the top of the protective cylinder 8, a temperature reduction mechanism 10 is arranged on the inner wall of the protective cylinder 8, a wind guiding and protecting mechanism 11 is arranged in the top inner cavity of the protective cover 9, and a wind guiding slope 14 is arranged at the position corresponding to the exhaust duct holes 7 at the bottom of the anti-burning head 3.

[0025] Further, the rotating ring 6 is fixedly connected with the anti-burning head 3, and the rotating ring 6 and the rotating groove 5 are very smooth.

[0026] Further, the protective cylinder 8 is made of a material with good heat conduction performance. Part of the heat generated by the working of the electrode body 2 will be directly conducted to the protective cylinder 8, which is convenient for subsequent cooling of the protective cylinder 8 and driving away the heat generated by the working of the electrode body 2.

[0027] Further, the temperature reduction mechanism 10 includes an annular pipe 101 arranged on the inner wall of the protective cylinder 8. A plurality of air guiding pipes 102 are interconnected at the top of the annular pipe 101, and an air inlet pipe 103 is interconnected on one side of the outer ring of the annular pipe 101.

[0028] Further, the air guiding pipes 102 penetrate through the top of the protective cylinder 8 and communicate with the inner cavity of the protective cover 9. The air inlet pipe 103 penetrates through the inner cavity wall of the protective cylinder 8. During the cutting process, the air is cooled by an external device and then introduced into the annular pipe 101 from the air inlet pipe 103, and then passes through the air guiding pipes 102, thereby cooling the protective cylinder 8, improving the heat dissipation effect of this cutting torch head, and ensuring the normal operation of this plasma cutting torch head.

[0029] Further, the wind guiding and protecting mechanism 11 includes a wind guiding ring 111 fixed on the top of the inner cavity of the nozzle body 1. A wind guiding ring groove 112 is arranged at the top of the wind guiding ring 111, and a plurality of air inlet slots 113 are arranged on the outer ring at the bottom of the wind guiding ring 111. The wind guiding ring groove 112 and the air inlet slots 113 are connected. The wind passing through the air guiding pipes 102 will be directly discharged into the protective cover 9, and then blown towards the wind guiding ring 111 at the top of the inner cavity. The wind will enter from the air inlet slots 113, and then converge and vertically and evenly spray out in the wind guiding ring groove 112. While taking away the heat at the top of the nozzle body 1, a wind wall is formed again around the top of the nozzle body 1 to avoid dust and impurities from entering, thereby protecting the nozzle body 1 and the anti-burning head 3, and further improving the protection effect of this plasma cutting torch head.

[0030] Furthermore, several ball grooves 12 are provided at the top of the inner cavity of the rotating groove 5. A ball 13 is arranged in the inner cavity of the ball groove 12. When high-pressure air blows on the anti-burning head 3, there is the same pressure as the air flow between the anti-burning head 3 and the nozzle body 1. Together with the balls 13 in the ball grooves 12, the friction between the rotating ring 6 and the rotating groove 5 is further reduced, ensuring that the anti-burning head 3 can rotate normally, thereby protecting the nozzle body 1.

[0031] Working principle: When using this plasma cutting gun head, the arc between the nozzle body 1 and the electrode body 2 is ejected through high-pressure air flow for metal cutting. During the process, the high-pressure air flow will pass through multiple inclined air guiding grooves 4 on the anti-burning head 3, and then drive the anti-burning head 3 to rotate rapidly under the action of the rotating ring 6 outside the anti-burning head 3 in the rotating groove 5. And part of the high-pressure air flow enters the exhaust duct 7 and is discharged under the action of the air guiding slope 14, forming an air wall in cooperation with the rotating anti-burning head 3, effectively protecting the nozzle from being scratched by the arc, and solving the problem that the existing plasma cutting gun head is easily scratched by the arc and causes the burning head.

[0032] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plasma cutting torch head, comprising a nozzle body (1), characterized in that: The inner cavity of the nozzle body (1) is provided with an electrode body (2). The top inner cavity of the nozzle body (1) is provided with an anti-burning head (3). The bottom of the inner cavity of the anti-burning head (3) is evenly and obliquely provided with a plurality of air guiding grooves (4). The top of the inner cavity wall of the nozzle body (1) is provided with a rotating groove (5). The inner cavity of the rotating groove (5) is rotatably connected with a rotating ring (6). The top of the anti-burning head (3) is provided with a plurality of exhaust air channels (7). The outside of the nozzle body (1) is sleeved with a protective cylinder (8). The top of the protective cylinder (8) is provided with a protective cover (9). The inner wall of the protective cylinder (8) is provided with a temperature reduction mechanism (10). The top inner cavity of the protective cover (9) is provided with an air guiding and protecting mechanism (11). A wind guiding slope (14) is arranged at the position corresponding to the exhaust air channels (7) at the bottom of the anti-burning head (3).

2. The plasma cutting tip according to claim 1, wherein: The rotating ring (6) is fixedly connected with the anti-burning head (3), and the rotating ring (6) and the rotating groove (5) are very smooth with each other.

3. The plasma cutting torch head according to claim 1, characterized in that: The protective cylinder (8) is made of a material with good heat conduction performance.

4. A plasma cutting torch head according to claim 1, characterized in that: The temperature reduction mechanism (10) includes an annular pipe (101) arranged on the inner wall of the protective cylinder (8). The top of the annular pipe (101) is interconnected with a plurality of air guiding pipes (102). One side of the outer ring of the annular pipe (101) is interconnected with an air inlet pipe (103).

5. The plasma cutting tip according to claim 4, characterized in that: The air guiding pipes (102) penetrate through the top of the protective cylinder (8) and are interconnected with the inner cavity of the protective cover (9). The air inlet pipe (103) penetrates through the inner cavity wall of the protective cylinder (8).

6. A plasma cutting torch head according to claim 1, characterized in that: The air guiding and protecting mechanism (11) includes an air guiding ring (111) fixed to the top of the inner cavity of the nozzle body (1). The top of the air guiding ring (111) is provided with an air guiding ring groove (112). The outer ring of the bottom of the air guiding ring (111) is provided with a plurality of air inlet slots (113). The air guiding ring groove (112) and the air inlet slots (113).

7. A plasma cutting tip according to claim 1, characterized in that: A plurality of ball grooves (12) are provided at the top of the inner cavity of the rotating groove (5). The inner cavity of the ball grooves (12) is provided with balls (13).

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