Spray plasma cutting gun

Abstract

The invention discloses a spray plasma cutting gun which comprises an aerial fog gun head, a cooling gas-electric tube, an aerial fog generator, an aerial fog gas outlet tube, a water suction tube, an aerial fog gas inlet tube, a cutting gas tube and an arc striking line. Three independent channels are arranged in the aerial fog gun head, and the three channels are a cooling air channel, an aerial fog channel and a cutting air channel. The cooling gas-electric tube is connected between the aerial fog gun 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; the air outlet end of the aerial fog generator is connected to an aerial fog channel of the aerial fog gun head through an aerial fog air outlet pipe; the air inlet end of the aerial fog generator is connected with an air outlet connector of the plasma cutting power source through an aerial fog air inlet pipe. The vacuum end of the aerial fog generator is communicated with cooling water in the water container through a water suction pipe. The device can be used when spraying is carried out and when no spraying is carried out, special auxiliary equipment is not needed, and spraying cutting can be achieved only by adding a proper amount of water into a proper water container.

Description

Technical Field

[0001] The present invention relates to the field of cutting, and more particularly to a spray plasma cutting gun. Background Art

[0002] The existing spray plasma cutting gun needs to provide a pressurized water source. The use of the existing spray plasma gun is limited to the pressurized water source (eg, tap water).

[0003] The entire cutting system of the existing spray plasma cutting gun is relatively expensive, and requires the laying of a water pipe for a pressure water source or a water pump to provide pressure.

[0004] The existing spray plasma cutting gun cannot work properly without water mist. The lack of water mist cooling causes the gun head to heat up, shortening the life of the cutting gun and accessories. Summary of the invention

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

[0006] The technical scheme of the present invention is: a spray plasma cutting gun, comprising an aerosol gun head, a cooling gas and electric pipe, an aerosol generator, an aerosol outlet pipe, a water suction pipe, an aerosol inlet pipe, a cutting gas pipe and an arc-starting wire;

[0007] The aerosol gun head is provided with three independent channels, which are a cooling gas channel, an aerosol channel and a cutting gas channel;

[0008] The cooling gas power pipe is connected between the aerosol gun head and the negative electrode of the plasma cutting power supply, and is used to deliver cutting power and cooling gas; the cooling gas is delivered to the cooling gas channel;

[0009] The air outlet end of the aerosol generator is connected to the aerosol channel of the aerosol gun head through an aerosol outlet pipe; the air inlet end of the aerosol generator is connected to the air outlet interface of the plasma cutting power supply through an aerosol inlet pipe; and the vacuum end of the aerosol generator is connected to the cooling water in the water container through a water suction pipe.

[0010] Furthermore, the gas outlet of the aerosol channel is a plurality of spray holes evenly distributed around the cutting nozzle on the aerosol gun head, and the water-gas mixture passing through the aerosol channel is sprayed out from the spray holes for preliminary atomization;

[0011] The air outlet of the cooling air channel is also a plurality of cooling holes evenly distributed around the cutting nozzle on the aerosol gun head;

[0012] The cooling holes are distributed one by one below the spray holes, and adjacent cooling holes and spray holes are connected via grooves;

[0013] The gas flow rate in the cooling holes is higher than the water-gas mixture flow rate in the spray holes. The water sprayed from the spray holes will flow to the cooling holes through the grooves and will be further atomized under the action of the gas sprayed from the cooling holes, thereby forming a dust-proof and noise-reducing water mist curtain around the nozzle.

[0014] Furthermore, the cooling gas-electric pipe is composed of a gas pipe and a conductor.

[0015] Furthermore, the conductor is passed through the inside of the trachea or is parallel to the outside of the trachea; when the conductor is passed through the inside of the trachea, the conductor is a bare conductor, and when the conductor is parallel to the outside of the trachea, it is a cable with an insulation layer.

[0016] Further, the aerosol gun head includes an insulating part, an outer copper part, a thermosetting plastic, an inner copper part, a flow guide tube, a copper cover ring, an electrode, a nozzle, a protective cover and an aerosol copper tube;

[0017] The gas in the cooling gas channel passes through the guide tube, electrode, inner copper part, insulating part and outer copper part, and flows out from multiple evenly distributed cooling holes at the far end of the outer copper part to cool most components in the aerosol gun head; the cooling effect is good.

[0018] The water-gas mixture in the aerosol channel flows from the aerosol copper tube into the small holes on the outer copper part, and then flows into the annular cavity formed by the outer copper part and the copper cover ring through the small holes on the outer copper part. The far end of the annular cavity is provided with a plurality of evenly distributed spray holes, and the water-gas mixture is sprayed out from the spray holes for preliminary atomization.

[0019] Furthermore, the gas in the cutting gas channel passes through the outer copper part and the insulating part to reach the inner copper part. The inner copper part is provided with spiral grooves, and the gas passes through these spiral grooves to form high-speed rotating gas; the high-speed rotating gas is ionized under the high voltage between the electrode and the nozzle to form a high-speed plasma cutting flow that is ejected from the small hole of the nozzle.

[0020] Furthermore, when the spray plasma gun has no cooling water, the gun head is cooled by the airflow passing through the cooling air channel on the gun body, so that cutting can be performed normally.

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

[0022] Provided is a plasma cutting gun that can be used with or without spray. Spray cutting can effectively reduce noise and dust, and can be used as a traditional air plasma cutting gun when conditions are limited. It has the characteristics of simple structure, wide range of use, and economical and affordable.

[0023] The present invention uses an aerosol generator (vacuum generator) to suck water from a water container (bucket) into the aerosol channel of the aerosol gun head, and atomization is achieved under the pressure gas flowing out of the cooling holes and the spray holes. The aerosol generator in the invention is a vacuum generator with a simple structure. It is very convenient to make, purchase and use, and the cost is also low. The aerosol gun head of the present invention 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 invention can still be effectively cooled by the cooling gas in the cooling gas channel.

[0024] The cooling gas channel and the cutting gas channel of the present invention are independent of each other and can adjust the corresponding gas flow rates respectively. The spray hole and the cooling hole are connected by a groove. The number of cooling holes is the same as the number of spray holes and grooves. The gas flow rate in the cooling hole is higher than the flow rate of the water-gas mixture in the spray hole. The water sprayed from the spray hole will flow to the cooling hole through the groove and will be further atomized under the action of the gas sprayed from the cooling hole, thereby forming a dust-proof and noise-reducing water mist curtain around the nozzle.

[0025] When the spray plasma gun has no cooling water, the gun head is cooled by the airflow passing through the cooling air channel on the gun body, so that cutting can be performed normally.

[0026] The spray type plasma gun is not limited by the location of the water source, does not require special auxiliary equipment, and only needs a suitable water container to put a proper amount of water to achieve spray cutting. It is easy to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall 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 for Figure 2 Middle FF rotation profile;

[0030] Figure 4 for Figure 3 A magnified view of the structure in the middle;

[0031] Figure 5 This is a schematic diagram of the internal copper parts structure;

[0032] Figure 6 for Figure 5 Sectional view in the middle AA direction;

[0033] Figure 7 It is a schematic diagram of the structure of the external copper parts;

[0034] Figure 8 for Figure 7 Cross-section in the middle BB direction;

[0035] Fig. 9 It is a schematic diagram of the structure of the external copper parts;

[0036] Fig.10 for Fig. 9 Cross-sectional view in the CC direction.

[0037] In the figure:

[0038]

[0039] DETAILED DESCRIPTION

[0040] The following is a description of a specific implementation case of a spray type plasma gun of the present invention, and the described implementation case is only one of the implementation cases of the present invention. All implementation cases involved in the present invention are within the protection of the claims of the present invention.

[0041] Spray type plasma cutting gun Figure 1 As shown, it includes Figure 1 The aerosol gun head 200 , the cooling gas and electricity pipe 201 , the aerosol generator 203 , the aerosol outlet pipe 204 , the water suction pipe 206 , the aerosol inlet pipe 209 , the cutting gas pipe 207 and the arc-starting wire 205 are shown.

[0042] like Figure 2 , 3 As shown, the aerosol gun head 200 includes: an insulating part 4, an outer copper head 5, a thermosetting plastic 6, an inner copper part 7, a sealing ring 8, a sealing ring 9, a flow 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, a gas-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 is provided with three independent channels, which are a cooling gas channel 1 , an aerosol channel 2 and a cutting gas channel 3 .

[0044] The cooling gas and electricity pipe 201 is connected between the aerosol gun head 200 and the negative pole of the plasma cutting power source 202, and is used to transport cutting power and cooling gas. The cooling gas is transported to the cooling gas channel 1. The gun head cooling gas and electricity pipe 201 is composed of an air pipe and a conductor. The conductor can be inserted inside the air pipe. A threaded joint is crimped at each end of the gun head cooling gas and electricity pipe 201, and the first connecting nut 19 of the spray gun head 200 and the gas and electricity joint of the plasma cutting power source 202 are respectively connected through two threaded joints.

[0045] The gas outlet of the aerosol generator 203 is connected to the gas-electric copper tube 2 of the spray gun head 200 through the aerosol outlet pipe 204 and fixed with a clamp. The gas inlet end is connected to the gas outlet interface of the plasma power supply through the aerosol inlet pipe 209, and the vacuum end is connected to the cooling water of the water bucket 208 through the water suction pipe 206. The gas outlet, vacuum end and gas inlet end of the aerosol generator have three gas pipe quick connectors, and the gas pipe can be directly inserted. The gas inlet pipe 209 and the gas outlet connector of the plasma cutting power supply 202 are connected through a quick gas connector.

[0046] The arc-starting wire 205 and the cutting gas pipe 207 are crimped into a threaded joint 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, and the other end of the cutting gas pipe 207 is connected to the gas outlet joint of the cutting power supply.

[0047] The copper cover ring 12, the gas-electric copper tube 17 and the aerosol copper tube 18 are welded to the outer copper head 5. The insulating part 4 is inserted into the outer copper part 5, and the connecting threads of the two are tightened. The inner copper part 7 is inserted into the insulating part 4. The above-assembled accessories are installed on the fixing tooling and shaped, and then injection molding is performed, and all components are fixed by thermosetting plastic 6.

[0048] The flow guide tube 10 is pressed into the inner hole of the inner copper part 7, and the contact surface of the two is 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 tube 10, the electrode 13, and the like. Figure 5 , 6 The inner copper part 7, the insulating part 4 and the Figure 7-10 The outer copper part 5 shown in the figure flows out from a plurality of evenly distributed cooling holes 212 at the far end of the outer copper part 5 to cool most of the components in the aerosol gun head 200. The cooling effect is good.

[0050] The water-gas 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 into the annular cavity formed by the outer copper part 5 and the copper cover ring 12 through the small hole on the outer copper part 5. There are multiple evenly distributed spray holes 210 at the far end of the annular cavity, and the water-gas mixture is sprayed out from the spray holes 210 for preliminary atomization.

[0051] The spray hole 210 and the cooling hole 212 are connected by a groove 211. The gas flow rate in the cooling hole 212 is higher than the water-gas mixture flow rate in the spray hole 210. The water sprayed from the spray hole 210 will flow to the cooling hole 212 through the groove 211 and will be further atomized under the action of the gas sprayed from the cooling hole 212. Thus, a dust-proof and noise-reducing water mist curtain is formed 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, and the gas passes through these spiral grooves to form high-speed rotating gas. 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.

[0053] When the spray plasma gun has no cooling water, the gun head is cooled by the airflow passing through the cooling air channel 1 on the gun body, and the cutting can be performed normally.

[0054] The above-mentioned implementation cases are preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, 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. The outer copper head and the copper cover ring are changed to threaded connection, and the fixing method of the various components of the aerosol gun head is changed from injection molding to adhesive, etc. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. Spray plasma cutting gun, characterized by: It comprises an aerosol gun head (200), a cooling gas and electricity pipe (201), an aerosol generator (203), an aerosol outlet pipe (204), a water suction pipe (206), an aerosol inlet pipe (209), a cutting gas pipe (207) and an arc-starting wire (205); The aerosol gun head (200) is provided with three channels that are independent of each other, the three channels being a cooling air channel (1), an aerosol channel (2) and a cutting air channel (3); The cooling gas electric pipe (201) is connected between the aerosol gun head (200) and the negative electrode of the plasma cutting power source (202) and is used to transmit cutting power and cooling gas; the cooling gas is transmitted to the cooling gas channel (1); The gas outlet end of the aerosol generator (203) is connected to the aerosol channel (2) of the aerosol gun head (200) via an aerosol outlet pipe (204); the gas inlet end of the aerosol generator (203) is connected to the gas outlet interface of the plasma cutting power source (202) via an aerosol inlet pipe (209); and the vacuum end of the aerosol generator (203) is connected to the cooling water in the water container via a water suction pipe (206).

2. The spray plasma cutting gun according to claim 1, characterized in that: The gas 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), and the water-gas mixture passing through the aerosol channel is sprayed out from the spray holes for preliminary atomization; The air 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 by one below the spray holes (210), and adjacent cooling holes (212) and spray holes (210) are connected via grooves (211); The gas flow rate in the cooling hole (212) is higher than the water-gas mixture flow rate in the spray hole (210), and the water sprayed from the spray hole (210) flows to the cooling hole (212) through the groove (211), and is further atomized under the action of the gas sprayed from the cooling hole (212); thereby 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-electric 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 passed through the inside of the trachea or is parallel to the outside of the trachea; when the conductor is passed through the inside of the trachea, the conductor is a bare conductor, and when the conductor is parallel to the outside of the trachea, it is a cable with an insulation layer.

5. The spray plasma cutting gun according to claim 1, characterized in that: The aerosol gun head (200) comprises an insulating part (4), an outer copper part (5), a thermosetting plastic (6), an inner copper part (7), a flow 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) passes through the flow guide tube (10), the electrode (13), the inner copper part (7), the insulating part (4) and the outer copper part (5), and flows out from a plurality of evenly distributed cooling holes (212) at the far end of the outer copper part (5), thereby cooling most of the components in the aerosol gun head (200); The water-gas mixture in the aerosol passage (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). The far end of the annular cavity is provided with a plurality of evenly distributed spray holes (210), and the water-gas 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 passes through the spiral grooves to form 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 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 the spray plasma gun has no cooling water, the gun head is cooled by the airflow passing through the cooling air channel (1) on the gun body, so that cutting can be performed normally.

Images