Spray plasma cutting torch

Abstract

The application discloses a spray plasma cutting gun, which comprises a gas mist gun head, a cooling gas electric pipe, a gas mist generator, a gas mist outlet pipe, a water suction pipe, a gas mist inlet pipe, a cutting gas pipe and an arc leading wire. Three channels, namely a cooling gas channel, a gas mist channel and a cutting gas channel, are arranged in the gas mist gun head. The cooling gas electric pipe is connected between the gas mist gun head and a negative electrode of a plasma cutting power supply and used for conveying cutting electric energy and cooling gas. The cooling gas is conveyed to the cooling gas channel. The gas outlet end of the gas mist generator is connected to the gas mist channel of the gas mist gun head through the gas mist outlet pipe. The gas inlet end of the gas mist generator is connected to a gas outlet interface of the plasma cutting power supply through the gas mist inlet pipe. The vacuum end of the gas mist generator is connected to cooling water in a water container through the water suction pipe. The spray plasma cutting gun can be used in both spray and non-spray modes, and no special auxiliary equipment is needed. Only a proper water container with appropriate water is needed to realize spray cutting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cutting, more particularly, the present application relates to a spray plasma cutting torch. BACKGROUND

[0002] The existing spray plasma cutting torch needs to be provided with a water source with pressure. The use of the existing spray plasma torch is limited to a water source with pressure (for example: tap water).

[0003] The existing spray plasma cutting torch has a high cost of the entire cutting system. It needs to lay a water pipe of the water source with pressure or provide a water pump with pressure.

[0004] The existing spray plasma cutting torch cannot work normally when the water mist is not provided. The cutting torch and accessories have a shortened service life due to the heating of the torch head lacking water mist cooling. SUMMARY

[0005] In view of the problems existing in the prior art, the present application provides a spray plasma cutting torch to solve at least one of the above problems.

[0006] The technical scheme of the present application is: a spray plasma cutting torch, comprising a gas mist torch head, a cooling gas electric pipe, a gas mist generator, a gas mist outlet pipe, a water suction pipe, a gas mist inlet pipe, a cutting gas pipe and an arc striking wire;

[0007] The gas mist torch head is provided with three channels independent of each other, which are a cooling gas channel, a gas mist channel and a cutting gas channel;

[0008] The cooling gas electric pipe is connected between the gas mist torch head and the negative electrode of the plasma cutting power supply, and is used for conveying cutting electric energy and cooling gas; the cooling gas is conveyed to the cooling gas channel;

[0009] The gas outlet end of the gas mist generator is connected to the gas mist channel of the gas mist torch head through the gas mist outlet pipe; the gas inlet end of the gas mist generator is connected to the gas outlet interface of the plasma cutting power supply through the gas mist inlet pipe; and the vacuum end of the gas mist generator is communicated with the cooling water in the water container through the water suction pipe.

[0010] Further, the gas outlet of the gas mist channel is a plurality of spray holes uniformly distributed around the cutting nozzle of the gas mist torch head, and the water-gas mixture in the gas mist channel is sprayed out of the spray holes for preliminary atomization;

[0011] The gas outlet of the cooling gas channel is also a plurality of cooling small holes uniformly distributed around the cutting nozzle of the gas mist torch head;

[0012] The cooling small holes are one-to-one corresponding to the spray holes below the spray holes, and adjacent cooling small holes and spray holes are communicated through grooves;

[0013] The gas flow rate in the cooling small holes is higher than the water-gas mixture flow rate in the spray holes, and the water sprayed in the spray holes flows to the cooling small holes through the grooves and is further atomized under the action of the gas sprayed in the cooling small holes; thus, a dustproof and noise-reducing water mist curtain is formed around the nozzle.

[0014] Further, the cooling gas tube is composed of a gas tube and a conductive body.

[0015] Further, the conductive body is arranged inside the gas tube or is parallel to the outside of the gas tube; when the conductive body is arranged inside the gas tube, the conductive body is a bare conductive body, and when the conductive body is parallel to the outside of the gas tube, the conductive body is a cable with an insulating layer.

[0016] Further, the gas mist gun head comprises an insulating piece, an outer copper piece, a thermosetting plastic, an inner copper piece, a flow guide tube, a copper cover ring, an electrode, a nozzle, a protective cover and a gas mist copper tube.

[0017] The gas in the cooling gas channel flows out from the multiple uniformly distributed cooling small holes at the distal end of the outer copper piece through the flow guide tube, the electrode, the inner copper piece, the insulating piece and the outer copper piece, and cools most of the components in the gas mist gun head; the cooling effect is good.

[0018] The water-gas mixture in the gas mist channel flows into the small holes on the outer copper piece from the gas mist copper tube, and then flows into the annular cavity formed by the outer copper piece and the copper cover ring through the small holes on the outer copper piece, and the annular cavity has multiple uniformly distributed spray holes at the distal end, and the water-gas mixture is sprayed out from the spray holes and is preliminarily atomized.

[0019] Further, the gas in the cutting gas channel reaches the inner copper piece through the outer copper piece and the insulating piece, and the inner copper piece is provided with spiral grooves, and the gas forms high-speed rotating gas through the spiral grooves; the high-speed rotating gas is ionized under high voltage between the electrode and the nozzle to form high-speed plasma cutting flow which is sprayed out from the small holes of the nozzle.

[0020] Further, when there is no cooling water, the gas flow through the cooling gas channel cools the gun head on the gun body, and the cutting can be normally operated.

[0021] The beneficial effects of the present application are:

[0022] The present application provides a plasma cutting gun which can be used with or without spraying; the spraying cutting can effectively reduce noise and dust, and can be used as a traditional air plasma cutting gun in limited conditions; the present application has the characteristics of simple structure, wide use range and economic and practical features.

[0023] The present application uses an aerosol generator (vacuum generator) to suck water in a water container (water bucket) into the aerosol channel of the aerosol gun head, and realizes atomization under the pressure gas flowing out of the cooling orifice and the spray orifice. The aerosol generator in the present application is a simple-structured vacuum generator. It is convenient to make, purchase and use, and has a low cost. The aerosol gun head of the present application has an aerosol channel, a cooling gas channel and a cutting gas channel, which do not interfere with each other. Therefore, when there is no water, the gun head and accessories of the present application can still be effectively cooled under the action of the cooling gas in the cooling gas channel.

[0024] The cooling gas channel and the cutting gas channel of the present application are independent of each other, and the corresponding gas flow can be adjusted respectively. The spray orifice and the cooling orifice are connected by a groove. The number of cooling orifices is the same as that of spray orifices and grooves. The flow rate of the gas in the cooling orifice is higher than that of the water-gas mixture in the spray orifice. The water sprayed in the spray orifice will flow to the cooling orifice through the groove, and further atomized under the action of the gas sprayed in the cooling orifice, so as to form a dustproof and noise-reducing water mist curtain around the nozzle.

[0025] The spray plasma gun can be cooled by the gas flow through the cooling gas channel, and the cutting can be normally operated when there is no cooling water.

[0026] The spray plasma gun is not limited by the position of the water source, does not need special auxiliary equipment, and only needs a suitable water container to put an appropriate amount of water to realize spray cutting. It is convenient to move. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall use structure of the spray plasma cutting gun;

[0028] Figure 2 It is a schematic diagram of the structure of the aerosol gun head;

[0029] Figure 3 It is Figure 2 the rotating section view of F-F;

[0030] Figure 4 It is Figure 3 the enlarged view of part of the structure;

[0031] Figure 5 It is a schematic diagram of the structure of the inner copper piece;

[0032] Figure 6 It is Figure 5 the section view in the direction of A-A;

[0033] Figure 7 It is a schematic diagram of the structure of the outer copper piece;

[0034] Figure 8 It is Figure 7 the section view in the direction of B-B;

[0035] Figure 9 This is a schematic diagram of the external copper component structure;

[0036] Figure 10 for Figure 9 Cross-sectional view along the CC direction.

[0037] In the picture:

[0038]

[0039] Detailed Implementation

[0040] The following describes a specific embodiment of a spray-type plasma gun according to the present invention. The described embodiment is only one example of the embodiments of the present invention. All embodiments involved in this invention are within the protection scope of the claims of this invention.

[0041] Spray plasma cutting guns, such as Figure 1 As shown, it includes, Figure 1 The components shown are: aerosol gun head 200, cooling air pipe 201, aerosol generator 203, aerosol outlet pipe 204, water suction pipe 206, aerosol inlet pipe 209, cutting air pipe 207, and arc-drawing wire 205.

[0042] like Figure 2 , 3 As shown, the aerosol gun head 200 includes: an insulating component 4, an outer copper head 5, a thermosetting plastic 6, an inner copper component 7, a sealing ring 8, a sealing ring 9, a guide tube 10, a sealing ring 11, a copper cover ring 12, an electrode 13, a nozzle 14, a protective cover 15, a second connecting nut 16, an air-electric copper tube 17, an aerosol copper tube 18, and a first connecting nut 19.

[0043] like Figure 3 As shown, the aerosol gun head 200 has three independent channels: a cooling air channel 1, an aerosol channel 2, and a cutting air channel 3.

[0044] The cooling gas-electric pipe 201 is connected between the aerosol gun head 200 and the negative terminal of the plasma cutting power supply 202, and is used to deliver cutting electrical energy and cooling gas. The cooling gas is delivered to the cooling gas channel 1. The gun head cooling gas-electric pipe 201 consists of a gas tube and a conductor. The conductor may be inserted inside the gas tube. A threaded connector is crimped to each end of the gun head cooling gas-electric pipe 201, and the two threaded connectors are respectively connected to the first connecting nut 19 of the aerosol gun head 200 and the gas-electric connector of the plasma cutting power supply 202.

[0045] The aerosol generator 203's outlet end is connected to the gas-electric copper pipe 2 of the spray gun head 200 via an aerosol outlet pipe 204 and secured with clamps. The inlet end is connected to the plasma power supply's outlet interface via an aerosol inlet pipe 209, and the vacuum end is connected to the cooling water in the water tank 208 via a water suction pipe 206. The aerosol generator has three quick-connect air hoses at its outlet, vacuum, and inlet ends, allowing for direct insertion of the air hoses. The aerosol inlet pipe 209 and the outlet connector of the plasma cutting power supply 202 are connected via quick-connect air hoses.

[0046] The arc-starting wire 205 and the cutting air tube 207 are crimped together with a threaded connector and then connected to the second connecting nut 16 of the aerosol gun head 200. The other end of the arc-starting wire 205 is connected to the positive arc-starting terminal of the plasma power supply through a terminal block, and the other end of the cutting air tube 207 is connected to the air outlet connector of the cutting power supply.

[0047] The copper cover ring 12, the gas-electric copper pipe 17, and the aerosol copper pipe 18 are welded to the outer copper head 5. The insulating component 4 is fitted into the outer copper component 5, and the connecting threads of the two are tightened. The inner copper component 7 is fitted into the insulating component 4. After the assembled accessories are fitted with a fixing fixture and shaped, they are injection molded, and all components are fixed by thermosetting plastic 6.

[0048] The guide tube 10 is pressed into the inner hole of the inner copper part 7, and the contact surface between the two is an interference fit. The electrode 13 is mounted on the distal external thread of the inner copper part 7. The nozzle 14 is mounted on the distal internal thread of the outer copper head 5. The protective cover 15 is mounted on the distal external thread of the copper cover ring 12.

[0049] The gas in the cooling gas channel 1 passes through the guide pipe 10, electrode 13, etc. Figure 5 , 6 The inner copper component 7, the insulating component 4, and as shown are... Figures 7-10 The cooling fluid flows out from multiple evenly distributed cooling holes 212 at the far end of the outer copper component 5, cooling most of the components inside the aerosol gun head 200. The cooling effect is good.

[0050] The water-air mixture in the aerosol channel 2 flows from the aerosol copper tube 18 into the small hole on the outer copper part 5, and then flows through the small hole on the outer copper part 5 into the annular cavity formed by the outer copper part 5 and the copper cover ring 12. There are multiple evenly distributed spray holes 210 at the far end of the annular cavity, and the water-air mixture is sprayed out from the spray holes 210 and initially atomized.

[0051] A groove 211 connects the spray orifice 210 and the cooling orifice 212. The gas velocity in the cooling orifice 212 is higher than the water-air mixture velocity in the spray orifice 210. The water sprayed from the spray orifice 210 flows through the groove 211 to the cooling orifice 212, where it is further atomized by the gas sprayed from the cooling orifice 212. This forms a dust-proof and noise-reducing water mist curtain around the nozzle.

[0052] The gas in the cutting gas channel 3 passes through the outer copper part 5 and the insulating part 4 to reach the inner copper part 7. The inner copper part 7 is provided with spiral grooves, through which the gas forms a high-speed rotating gas. The high-speed rotating gas is ionized under the high voltage between the electrode 13 and the nozzle 14, forming a high-speed plasma cutting stream that is ejected from the small hole of the nozzle.

[0053] When there is no cooling water, the spray plasma gun body is cooled by the airflow through the cooling gas channel 1, and the cutting can be carried out normally.

[0054] The above embodiments are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements can be made without departing from the principle of the present invention, such as: the connection method of the aerosol generator and the water suction pipe, the aerosol outlet pipe, and the aerosol inlet pipe; changing the outer copper head and copper cover ring to a threaded connection; and changing the fixing method of each component of the aerosol gun head from injection molding to adhesive, etc. These improvements should also be considered within the scope of protection of the present invention.

Claims

1. A spray plasma cutting gun, characterized in that: It includes an aerosol gun head (200), a cooling air pipe (201), an aerosol generator (203), an aerosol outlet pipe (204), a water suction pipe (206), an aerosol inlet pipe (209), a cutting air pipe (207), and an arc-drawing wire (205); The aerosol gun head (200) is provided with three independent channels: a cooling air channel (1), an aerosol channel (2), and a cutting air channel (3). The cooling gas pipe (201) is connected between the aerosol gun head (200) and the negative terminal of the plasma cutting power supply (202) to deliver cutting power and cooling gas; the cooling gas is delivered to the cooling gas channel (1); The outlet of the aerosol generator (203) is connected to the aerosol channel (2) of the aerosol gun head (200) through an aerosol outlet pipe (204); the inlet of the aerosol generator (203) is connected to the outlet of the plasma cutting power supply (202) through an aerosol inlet pipe (209); and the vacuum end of the aerosol generator (203) is connected to the cooling water in the water container through a water suction pipe (206).

2. The spray plasma cutting gun according to claim 1, characterized in that: The air outlet of the aerosol channel (2) is a plurality of spray holes (210) evenly distributed around the cutting nozzle on the aerosol gun head (200). The water-air mixture passing through the aerosol channel is sprayed out from the spray holes and initially atomized. The outlet of the cooling air channel (1) is also a plurality of cooling holes (212) evenly distributed around the cutting nozzle on the aerosol gun head (200); The cooling holes (212) are distributed one-to-one below the spray holes (210), and adjacent cooling holes (212) and spray holes (210) are connected by grooves (211); The gas velocity in the cooling hole (212) is higher than the water-air mixture velocity in the spray hole (210). The water sprayed out of the spray hole (210) will flow through the groove (211) to the cooling hole (212) and be further atomized under the action of the gas sprayed out of the cooling hole (212); thus forming a dust-proof and noise-reducing water mist curtain around the nozzle.

3. The spray plasma cutting gun according to claim 1, characterized in that: The cooling gas pipe (201) is composed of a gas pipe and a conductor.

4. The spray plasma cutting gun according to claim 3, characterized in that: The conductor is either inserted inside the trachea or runs parallel to the outside of the trachea; when inserted inside the trachea, the conductor is an exposed conductor, and when run parallel to the outside of the trachea, it is an insulated cable.

5. The spray plasma cutting gun according to claim 1, characterized in that: The aerosol gun head (200) includes an insulating component (4), an outer copper component (5), a thermosetting plastic component (6), an inner copper component (7), a guide tube (10), a copper cover ring (12), an electrode (13), a nozzle (14), a protective cover (15), and an aerosol copper tube (18). The gas in the cooling gas channel (1) flows out through the guide pipe (10), electrode (13), inner copper part (7), insulating part (4) and outer copper part (5) from multiple uniformly distributed cooling holes (212) at the far end of the outer copper part (5) to cool most of the components inside the aerosol gun head (200); The water-air mixture in the aerosol channel (2) flows from the aerosol copper tube (18) into the small hole on the outer copper part (5), and then flows through the small hole on the outer copper part (5) into the annular cavity formed by the outer copper part (5) and the copper cover ring (12). There are multiple evenly distributed spray holes (210) at the far end of the annular cavity. The water-air mixture is sprayed out from the spray holes (210) and initially atomized.

6. The spray plasma cutting gun according to claim 5, characterized in that: The gas in the cutting gas channel (3) passes through the outer copper part (5) and the insulating part (4) to reach the inner copper part (7). The inner copper part (7) is provided with spiral grooves, and the gas forms a high-speed rotating gas through these spiral grooves. The high-speed rotating gas is ionized under the high voltage between the electrode (13) and the nozzle (14) to form a high-speed plasma cutting flow that is ejected from the small hole of the nozzle.

7. The spray plasma cutting gun according to claim 1, characterized in that: When there is no cooling water, the spray plasma gun body is cooled by the airflow through the cooling gas channel (1) to ensure normal cutting operation.

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