Assembly for plasma cutting torch

Abstract

The utility model relates to an assembly for a plasma cutting torch, which comprises a nozzle and an inner fixing cover, and the inner fixing cover is sleeved on the nozzle. The nozzle comprises a near end and a far end, and a forward surface facing the near end is arranged between the near end and the far end; the inner fixing cover comprises an inner fixing cover inner core and an inner fixing cover outer shell, the inner fixing cover inner core is sleeved with the inner fixing cover outer shell, a backward surface is arranged on the inner surface of the inner fixing cover inner core, and the forward surface and the backward surface are matched to form a fluid channel. A cooling flow channel is arranged between the inner fixing cover inner core and the inner fixing cover shell. According to the assembly for the plasma cutting torch, the cooling channel is formed between the inner core and the outer shell of the inner fixing cover, the inner fixing cover can be effectively cooled, the cooling effect is greatly improved, and the service life of the inner fixing cover is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to a component for a plasma cutting torch and belongs to the technical field of plasma cutting. Background Art

[0002] Plasma cutting is a process that uses an accelerated jet of hot plasma to cut conductive materials. Typical materials cut using a plasma torch include steel, stainless steel, aluminum, brass, and copper, but other conductive metals can also be cut. Plasma cutting is commonly used in manufacturing shops, automotive repair and restoration, industrial construction, and salvage and scrap operations. Plasma cutting is widely used due to its fast cutting speed, high precision, and low cost.

[0003] The basic plasma cutting process involves creating an electrical path for a superheated ionized gas (i.e., the plasma from the plasma cutter itself) to pass through the workpiece to be cut, completing a complete circuit back to the plasma cutter through a ground clamp. This is achieved by compressed gas (oxygen, air, inert gas, and others depending on the material being cut) that is blown at high speed through a focused nozzle toward the workpiece. An arc is then formed between an electrode within the gas, near or integrated into the gas nozzle, and the workpiece itself. The arc ionizes some of the gas, forming a conductive path for the plasma. As the current from the torch travels along the plasma, it provides enough heat to melt the workpiece. At the same time, large amounts of high-speed plasma and compressed gas blow away the hot molten metal, thereby separating, i.e., cutting, the workpiece.

[0004] Usually, a cutting torch includes components such as an electrode, a swirl ring, a nozzle, a fixed cover, and a protective cap. The electrode is used to emit plasma arcs, the nozzle is used to compress and spray plasma arcs, and the protective cap is used to protect internal parts. These three are wearing parts, that is, parts that are easily damaged. The swirl ring is generally made of high-temperature resistant insulating materials and is far away from heat sources, such as polyimide, ceramics, volcanic rocks and other materials, and is not easy to damage. On the one hand, the internal fixed cover is subject to a lot of heat conducted by the protective cap and the nozzle, and is easily damaged under long-term high temperature conditions. On the other hand, the cost is high, so its life needs to be enhanced. The prior art is to cool the internal fixed cover by flowing coolant through a small chamber formed by only a small section of the middle part of the inner surface of the internal fixed cover, the outer surface of the nozzle, and the front end surface of the cutting torch, and the cooling effect is not good. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a component for a plasma cutting torch which can effectively solve the above problems in view of the above prior art.

[0006] The technical solution adopted by the utility model to solve the above problems is: a component for a plasma cutting torch, which comprises a nozzle and an inner fixed cover, wherein the inner fixed cover is sleeved on the nozzle;

[0007] The nozzle includes a proximal end and a distal end, and a forward surface facing the proximal end is arranged between the proximal end and the distal end; the inner fixed cover includes an inner fixed cover inner core and an inner fixed cover outer shell, the inner fixed cover outer shell is sleeved on the inner fixed cover inner core, and the inner surface of the inner fixed cover inner core is provided with a backward surface, the forward surface and the backward surface cooperate to form a fluid channel, a cooling channel is arranged between the inner fixed cover inner core and the inner fixed cover outer shell, and the fluid channel is connected with the cooling channel.

[0008] Preferably, a circular ring is arranged between the proximal end and the distal end, and the forward surface is arranged on the circular ring.

[0009] Preferably, the nozzle comprises a nozzle inner core and a nozzle outer shell, and the nozzle outer shell is sleeved on the nozzle inner core.

[0010] Preferably, the nozzle inner core and the nozzle outer shell are made of metal.

[0011] Preferably, the forward surface is a flat surface or a concave-convex surface.

[0012] Preferably, the rearward surface is a flat surface or a concave-convex surface.

[0013] Preferably, at least one flow channel groove or flow channel hole is formed on the forward surface.

[0014] Preferably, the material of the inner core of the inner fixed cover is metal, and the material of the outer shell of the inner fixed cover is insulating material.

[0015] Preferably, the cooling channel is arranged on the outer surface of the inner core of the inner stationary cover and / or the inner surface of the outer shell of the inner stationary cover.

[0016] Preferably, the cooling channel is groove-shaped.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The utility model discloses a component for a plasma cutting torch, wherein a cooling channel is formed between an inner core and an outer shell of an inner fixed cover, which can effectively cool the inner fixed cover, greatly improves the cooling effect, and effectively ensures the service life of the inner fixed cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the overall appearance of a component used for a plasma cutting torch.

[0020] Figure 2 It is a cross-sectional schematic diagram of a component embodiment 1 for a plasma cutting torch of the utility model.

[0021] Figure 3 for Figure 2 Schematic diagram of the nozzle structure.

[0022] Figure 4 It is a cross-sectional schematic diagram of a component embodiment 2 of the utility model for a plasma cutting torch.

[0023] Figure 5 for Figure 4 Schematic diagram of the nozzle structure.

[0024] Figure 6 It is a cross-sectional schematic diagram of a component embodiment 3 of the utility model for a plasma cutting torch.

[0025] Figure 7 for Figure 6 Schematic diagram of the nozzle structure.

[0026] Figure 8 It is a schematic diagram of the structure of the inner fixed cover.

[0027] Fig. 9 It is a schematic diagram of the structure of the inner core of the inner fixed cover.

[0028] Fig.10 It is a cross-sectional schematic diagram of the inner fixed cover shell.

[0029] Fig.11 It is a cross-sectional schematic diagram of another embodiment of the inner fixing cover outer shell.

[0030] in:

[0031] Nozzle 1

[0032] Internal fixed cover 2

[0033] Proximal 1.1

[0034] Remote 1.2

[0035] Torus 1.3

[0036] Forward surface 1.4

[0037] Inner fixed cover inner core 2.1

[0038] Internal fixed cover shell 2.2

[0039] Backward surface 2.3

[0040] Fluid channel 3

[0041] Cooling channel 4

[0042] Runner groove 5

[0043] Flow channel hole 6. DETAILED DESCRIPTION

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] like Figures 1 to 11 As shown, a component for a plasma cutting torch in this embodiment includes a nozzle 1 and an inner fixed cover 2, wherein the inner fixed cover 2 is sleeved on the nozzle 1.

[0046] The nozzle 1 comprises a proximal end 1.1 and a distal end 1.2, wherein the proximal end 1.1 is an injection port, and the distal end 1.2 is installed in the cutting torch body, and the proximal end 1.1 passes through an inner fixed cover 2, and a circular ring 1.3 with a larger diameter is arranged between the proximal end 1.1 and the distal end 1.2, and the circular ring comprises a forward surface 1.4 facing the proximal end 1.1;

[0047] The nozzle 1 is a substantially hollow cylinder;

[0048] The nozzle 1 comprises a nozzle inner core 1.3 and a nozzle outer shell 1.4, wherein the nozzle outer shell 1.4 is sleeved on the nozzle inner core 1.3;

[0049] The nozzle inner core 1.3 and the nozzle outer shell 1.4 are made of metal;

[0050] The inner fixed cover 2 comprises an inner fixed cover inner core 2.1 and an inner fixed cover outer shell 2.2, wherein the inner fixed cover outer shell 2.2 is mounted on the inner fixed cover inner core 2.1, wherein the inner surface of the inner core of the inner fixed cover inner core 2.1 is provided with a rearward surface 2.3, wherein a fluid channel 3 is formed between the forward surface 1.4 and the rearward surface 2.3, wherein a cooling channel 4 is provided between the inner fixed cover inner core 2.1 and the inner fixed cover outer shell 2.2, wherein the fluid channel 3 is connected with the cooling channel 4;

[0051] The inner core 2.1 of the inner fixed cover and the outer shell 2.2 of the inner fixed cover are substantially hollow;

[0052] The forward-facing surface 1.4 is a flat surface, and the rearward-facing surface 2.3 is a flat surface;

[0053] Or the forward surface 1.4 is a concave-convex surface, and the rearward surface 2.3 is a concave-convex surface;

[0054] Or at least one flow channel 5 is formed on the forward surface 1.4, and the flow channel 5 is semicircular;

[0055] Or at least one flow channel hole 6 is provided on the forward surface 1.4;

[0056] The material of the inner core 2.1 of the inner fixed cover is metal, preferably brass;

[0057] The material of the inner fixed cover shell 2.2 is an insulating material, preferably a high temperature resistant plastic, such as PEEK (polyetheretherketone);

[0058] The cooling channel 4 is arranged on the outer surface of the inner core 2.1 of the inner fixed cover and / or the inner surface of the inner fixed cover outer shell 2.2;

[0059] The cooling channel 4 is in a groove shape.

[0060] Working principle:

[0061] When installing, the far end of the nozzle is installed in the torch body, the rearward surface of the ring contacts with the proximal end of the torch body, and then the proximal end of the nozzle passes through and protrudes from the proximal end of the inner fixed cover. The inner fixed cover is rotated, and the threads of the metal parts of the inner fixed cover are matched with the threads on the torch body until the rearward surface of the proximal end of the metal parts of the inner fixed cover contacts with the surface with convex surface or semicircular groove or circular hole on the forward surface of the nozzle ring. The coolant flows out from the head of the torch body, passes through the concave surface or semicircular groove or circular hole gap on the forward surface of the nozzle ring, enters the nozzle sandwich cavity, goes around the nozzle half circumference to the other side, flows out through the sandwich water outlet, and then enters the groove channel between the insulating part and the metal part of the inner fixed cover, takes away the heat on the metal part and the insulating part, flows into the torch body, and finally returns to the water tank through the cable to complete the heat exchange.

[0062] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A component for a plasma cutting torch, characterized in that: It comprises a nozzle and an inner fixed cover, wherein the inner fixed cover is sleeved on the nozzle; The nozzle includes a proximal end and a distal end, and a forward surface facing the proximal end is arranged between the proximal end and the distal end; the inner fixed cover includes an inner fixed cover inner core and an inner fixed cover outer shell, the inner fixed cover outer shell is sleeved on the inner fixed cover inner core, and the inner surface of the inner fixed cover inner core is provided with a backward surface, the forward surface and the backward surface cooperate to form a fluid channel, a cooling channel is arranged between the inner fixed cover inner core and the inner fixed cover outer shell, and the fluid channel is connected with the cooling channel.

2. A component for a plasma cutting torch according to claim 1, characterized in that: A circular ring is arranged between the proximal end and the distal end, and the forward surface is arranged on the circular ring.

3. The assembly for a plasma cutting torch according to claim 1, characterized in that: The nozzle comprises a nozzle inner core and a nozzle outer shell, and the nozzle outer shell is sleeved on the nozzle inner core.

4. A component for a plasma cutting torch according to claim 3, characterized in that: The nozzle inner core and the nozzle outer shell are made of metal.

5. The assembly for a plasma cutting torch according to claim 1, characterized in that: The forward surface is a flat surface or a concave-convex surface.

6. The assembly for a plasma cutting torch according to claim 1, characterized in that: The rearward surface is a flat surface or a concave-convex surface.

7. The assembly for a plasma cutting torch according to claim 1, characterized in that: At least one flow channel groove or flow channel hole is formed on the forward-facing surface.

8. The assembly for a plasma cutting torch according to claim 1, characterized in that: The material of the inner core of the inner fixed cover is metal, and the material of the outer shell of the inner fixed cover is insulating material.

9. The assembly for a plasma cutting torch according to claim 1, characterized in that: The cooling channel is arranged on the outer surface of the inner core of the inner stationary cover and / or the inner surface of the outer shell of the inner stationary cover.

10. A component for a plasma cutting torch according to claim 9, characterized in that: The cooling channel is in a groove shape.

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