Plasma welding apparatus for hardware

Abstract

The application relates to the technical field of plasma welding, and discloses a plasma welding device for hardware devices, a baffle ring is fixedly installed in the middle of a cooling cavity, a rotating ring is movably sleeved between a water inlet ring groove and the cooling cavity, baffle plates are uniformly fixedly installed on the outer wall of the rotating ring, an air inlet hole is arranged between a gas inlet ring groove and an electrode cavity in the inside of a spray head, a rotating adjusting switch is installed in the air inlet hole, an electromagnetic valve is fixedly installed in a water outlet hole, a temperature tube is fixedly installed on the top wall of the cooling cavity and corresponds to the opening of the water outlet hole, a pressure plate is movably sleeved in the middle of an adjusting ring groove, and a jacking column is movably installed at the bottom of the adjusting ring groove; the water inlet design ensures the uniformity of the flow of the cooling liquid, thereby improving the uniformity of cooling; the temperature tube control controls the discharge of the cooling liquid to keep the temperature inside the cooling cavity; the wind resistance adjusts the change of the ion arc, and the cooling and welding effects are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma welding, in particular to a plasma welding device for hardware devices. BACKGROUND

[0002] Plasma welding refers to a fusion welding method using a high-energy density beam of plasma arc as a welding heat source. The welding device structure generally has a tungsten electrode arranged inside the nozzle, cooling water is introduced into the inner wall of the nozzle, and argon gas is introduced into the top of the nozzle. Thus, an ion arc is formed at the nozzle, which utilizes the high temperature generated by the ion arc to melt the hardware to be welded, thereby enabling welding. Although plasma welding technology has been widely applied today, there are still certain deficiencies in its specific application.

[0003] Firstly, when using plasma welding, the side of the nozzle needs to be connected to cooling liquid for cooling. However, the existing nozzle structure causes the cooling liquid to enter at the bottom of one side and flow out at the top of the other side, which results in ineffective and uniform cooling from the bottom to the top in the cooling cavity, and also easily forms backflow at the bottom of the outlet side of the cooling cavity, thereby causing different cooling effects at the same height in the cooling cavity and backflow at the top of the inlet of the cooling cavity. These all cause large differences in the cooling effect in the nozzle, thereby reducing the service life of the nozzle.

[0004] Moreover, when using plasma welding, since the tungsten electrode is directly installed inside the nozzle, the tungsten electrode will be slightly angularly offset when the argon gas is introduced, thereby causing the ion arc generated at the nozzle to not be in the center. Since the welding device is arranged at the middle position to be welded, this causes deviation between the ion arc and the weld, thereby causing certain misalignment in welding and affecting the welding quality. SUMMARY

[0005] In view of the above background technology, the present application provides a plasma welding device for hardware devices, which has the advantages of good cooling effect and good welding quality, and solves the problems raised in the background technology.

[0006] The application provides the following technical scheme: a plasma welding device for hardware devices, comprising a gun body, a spray head and a protective sleeve, the bottom of the gun body is fixedly connected with the spray head, the outer circle of the bottom of the spray head is fixedly sleeved with the protective sleeve, the middle part of the spray head is provided with an electrode cavity, the bottom surface of the gun body is fixedly installed with a tungsten electrode extending to the middle part of the electrode cavity, the middle part of the bottom end of the spray head is provided with a nozzle, the inner wall of the spray head is provided with a cooling cavity, the middle part of the cooling cavity is fixedly installed with a blocking ring, the inner part of the spray head is provided with a water inlet ring groove at the outer circle of the middle part of the cooling cavity, a rotating ring is movably sleeved between the water inlet ring groove and the cooling cavity, the outer wall of the rotating ring is uniformly fixedly installed with a baffle, a one-way valve is fixedly installed between the inner wall of the rotating ring and adjacent baffles, the outer wall of the spray head is installed with a water inlet opening in communication therewith at the same height of the water inlet ring groove, the inner part of the spray head is provided with a water outlet ring groove in communication therewith at the outer circle of the top of the cooling cavity, the outer wall of the spray head is installed with a water outlet opening in communication therewith at the same height of the water outlet ring groove, the inner part of the top end of the spray head is provided with a gas inlet ring groove, the inner part of the gas inlet hole is installed with a rotating adjusting switch, and the outer wall of the spray head is installed with a gas inlet opening in communication therewith at the same height of the gas inlet ring groove.

[0007] Preferably, the water inlet opening, the water outlet opening and the gas inlet opening are tangentially communicated to the inner part of the water inlet ring groove, the water outlet ring groove and the gas inlet ring groove respectively, the cooling cavity and the water outlet ring groove are provided with a water outlet hole, the inner part of the water outlet hole is fixedly installed with a solenoid valve, the top wall of the cooling cavity is fixedly installed with a temperature tube at the opening of the water outlet hole, the inner part of the temperature tube is provided with a mercury liquid cavity, the inner part of the spray head is provided with an adjusting ring groove at the top of the temperature tube, the middle part of the adjusting ring groove is movably sleeved with a pressing disc, the bottom of the adjusting ring groove is movably installed with a top column, the top of the mercury liquid cavity is movably sleeved with a sealing plug fixedly connected with the bottom end of the top column, the outer circle of the top column and the inner wall of the adjusting ring groove are fixedly connected with a bellows, the top of the pressing disc and the top wall of the adjusting ring groove are fixedly installed with a pressing spring, the top of the top column is provided with a contact groove, and the bottom of the pressing disc is provided with a contact head corresponding to the contact groove.

[0008] Preferably, the adjusting rotating plate is movably installed in the gas inlet hole, the bottom wall of the gas inlet hole is provided with a sliding groove at the bottom of the adjusting rotating plate, the bottom of the adjusting rotating plate is fixedly connected with an arc-shaped sleeve rod, one end of the sleeve rod is sleeved in the sliding groove, the inner wall of the sliding groove and the end surface of the sleeve rod are fixedly connected with a supporting spring, the bottom wall of the gas inlet hole is fixedly installed with a resistance strip at the opening of the sliding groove, the inner part of the protective sleeve is uniformly fixedly installed with an electromagnet corresponding to the gas inlet hole, the resistance strip is in contact with the sleeve rod and is conductive, and the resistance strip, the sleeve rod and the electromagnet are linearly connected.

[0009] Preferably, the mercury liquid cavity is filled with mercury, the temperature tube is made of a good conductor, the pressure plate slides vertically in the adjusting ring groove, and the contact head is in contact with the contact groove to turn on the corresponding electromagnetic valve.

[0010] Preferably, the circuit connected by the sleeve rod and the resistance strip is connected in series with the electromagnetic circuit in the opposite direction of the bottom, and the sleeve rod is in contact with the resistance strip when the adjusting rotating plate is in the horizontal position to maximize the resistance of the circuit.

[0011] Preferably, a rotating groove is formed in the middle of the air inlet hole, an adjusting rotating shaft is movably sleeved in the rotating groove, a torsional spring is fixedly sleeved between the adjusting rotating shaft and the sleeving shaft, a gas guide groove is formed in the adjusting rotating shaft, the opening size of the gas guide groove close to the electrode cavity is the same as the diameter of the air inlet hole, and the opening size of the gas guide groove close to the air inlet ring groove is not less than twice the opening size close to the electrode cavity.

[0012] Preferably, the side edge of the adjusting rotating shaft is connected to the electromagnetic circuit through a sliding resistance, and when the opening of the gas guide groove close to the electrode cavity is reduced, the current in the electromagnetic circuit in the opposite direction of the bottom is increased.

[0013] The present application has the following advantages:

[0014] 1. The rotating ring is arranged to control the water inlet of the cooling cavity, and the cooling cavity is provided with electromagnetic structures such as a baffle ring and a temperature tube, compared with the prior art, the tangential water flow in the water inlet ring groove is used to realize uniform water inlet of the cooling cavity, the baffle ring is used to guide the cooling water flow to realize uniform cooling of the inner wall of the nozzle from bottom to top, the temperature tube is arranged at the top of the cooling cavity to realize temperature monitoring, and the contact between the top column and the pressure plate is realized by using temperature change, that is, the electrical contact between the contact head and the contact groove is realized, so that the corresponding electromagnetic valve switch is opened to discharge the cooling liquid, so that the temperature control drainage at the top of the cooling cavity is realized, the cooling liquid at the highest temperature in the cooling cavity is discharged in time, and the cooling effect is improved, and the nozzle is also better protected to increase the service life.

[0015] 2. A plurality of air inlet holes are arranged in the nozzle, a rotating adjusting switch is arranged in the air inlet hole, and an electromagnet corresponding to the protection sleeve is arranged in the protection sleeve, compared with the prior art, the plurality of air inlet holes are symmetrically arranged, when the tungsten electrode deviates, the air resistance change in the air inlet hole drives the rotating of the adjusting rotating plate or the adjusting rotating shaft, the current in the circuit is adjusted, and the change of the magnetic force of the corresponding electromagnet on the bottom is transmitted by the control system, the ion arc of the deviated tungsten electrode is corrected by using the change of the magnetic force, so that the tungsten electrode can be perpendicular to the weld to ensure the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Structure diagram of embodiment one of the present application;

[0017] Figure 2 Structure diagram of embodiment one of the present application; Figure 1 Sectional view of A-A in the above structure;

[0018] Figure 3 Structure diagram of embodiment one of the present application; Figure 1 Sectional view of B-B in the above structure;

[0019] Figure 4 Structure diagram of embodiment one of the present application; Figure 1 Enlarged view of C in the above structure;

[0020] Figure 5 Structure diagram of embodiment two of the present application;

[0021] Figure 6 Structure diagram of embodiment two of the present application; Figure 5 Sectional view of D-D in the above structure;

[0022] Figure 7 Structure diagram of embodiment two of the present application; Figure 5 Enlarged view of E in the above structure;

[0023] Figure 8 Structure diagram of electromagnetic valve circuit of the present application;

[0024] Figure 9 Structure diagram of electromagnetic valve circuit of the present application;

[0025] In the figure: 1, gun body; 2, spray head; 201, electrode cavity; 202, nozzle; 203, cooling cavity; 2031, blocking ring; 204, water inlet ring groove; 205, water outlet ring groove; 2051, water outlet hole; 206, air inlet ring groove; 2061, air inlet hole; 207, adjusting ring groove; 208, sliding groove; 209, rotating groove; 3, protective sleeve; 4, tungsten electrode; 5, water inlet; 6, rotating ring; 601, baffle; 602, one-way valve; 7, electromagnetic valve; 8, water outlet; 9, temperature tube; 901, mercury cavity; 902, sealing plug; 10, air inlet; 11, pressure plate; 12, top column; 13, contact; 14, contact groove; 15, bellows; 16, pressure spring; 17, adjusting rotating plate; 1701, sleeve rod; 18, resistance strip; 19, electromagnet; 20, supporting spring; 21, adjusting rotating shaft; 2101, air guide groove; 22, torsion spring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0027] Embodiment one

[0028] Please refer to the drawings of the embodiments of the present application Figure 1 , the drawings of the embodiments of the present application Figure 2 , the drawings of the embodiments of the present application Figure 3 , the drawings of the embodiments of the present application Figure 4 , the drawings of the embodiments of the present application Figure 8 , the drawings of the embodiments of the present application Figure 9The utility model provides a kind of plasma welding device for hardware device, including gun body 1, spray head 2 and protective sleeve 3, the bottom of gun body 1 is fixedly connected with spray head 2, the outer circle of the bottom of spray head 2 is fixedly sleeved with protective sleeve 3, the middle part of spray head 2 is equipped with electrode cavity 201, the bottom surface of gun body 1 is fixedly installed with tungsten electrode 4 that extends to the middle part of electrode cavity 201, the middle part of the bottom end of spray head 2 is equipped with nozzle 202, the middle of the inner wall of spray head 2 is equipped with cooling cavity 203, cooling cavity 203 is fixedly installed with baffle ring 2031 in the middle part, the middle part of the outer circle of cooling cavity 203 is equipped with water inlet ring groove 204 in spray head 2 inside, water inlet ring groove 204 and cooling cavity 203 between movably sleeved with swivel ring 6, the outer wall of swivel ring 6 is uniformly fixedly installed with baffle 601, the inner wall of swivel ring 6 is fixedly installed with check valve 602 between adjacent baffle 601, the outer wall of spray head 2 is installed with water inlet 5 that is communicated with it at the equal height of water inlet ring groove 204, the top outer circle position of the inside of spray head 2 is equipped with water outlet ring groove 205 that is communicated with it at the top outer circle position of cooling cavity 203, the outer wall of spray head 2 is installed with water outlet 8 that is communicated with it at the equal height of water outlet ring groove 205, the inside of spray head 2 is equipped with air inlet ring groove 206 at the top end, the inside of spray head 2 is equipped with air inlet hole 2061 between air inlet ring groove 206 and electrode cavity 201, air inlet hole 2061 is installed with rotary adjustment switch, the outer wall of spray head 2 is installed with air inlet 10 that is communicated with it at the equal height of air inlet ring groove 206, water inlet 5, water outlet 8 and air inlet 10 are tangentially communicated respectively to the inside of water inlet ring groove 204, water outlet ring groove 205 and air inlet ring groove 206, cooling cavity 203 and water outlet ring groove 205 are equipped with water outlet hole 2051, water outlet hole 2051 is fixedly installed with solenoid valve 7 in the inside, the top wall of cooling cavity 203 is fixedly installed with temperature tube 9 at the opening of water outlet hole 2051, temperature tube 9 is equipped with mercury cavity 901 in the inside, the inside of spray head 2 is equipped with adjusting ring groove 207 at the top of temperature tube 9, adjusting ring groove 207 movably sleeved with pressure disc 11 in the middle part, adjusting ring groove 207 is movably installed with top column 12 at the bottom, mercury cavity 901 is movably sleeved with sealing plug 902 at the top, the bottom of top column 12 is fixedly connected with top column 12, the outer circle of top column 12 and the inner wall of adjusting ring groove 207 are fixedly connected with bellow 15, the top of pressure disc 11 and the top wall of adjusting ring groove 207 are fixedly installed with pressure spring 16, the top of top column 12 is equipped with touch groove 14, the bottom of pressure disc 11 is equipped with contact 13 corresponding to touch groove 14, mercury is contained in the inside of mercury cavity 901, and the outer wall of temperature tube 9 is made of good conductor, pressure disc 11 is vertically slid up and down in adjusting ring groove 207, contact 13 and touch groove 14 contact and connect the switch corresponding to solenoid valve 7, pressure disc 11 is always kept downward and contacts the end surface of top column 12 by pressure spring 16, because the temperature is not the same in each place in cooling cavity 203, it leads to the temperature difference in each temperature tube 9 inside feedback to sealing plug 902 and drives top column 12 to move upwards, but pressure disc 11 keeps parallel state, so only the top of top column 12 at the highest place can contact pressure disc 11,Thus, the contact 13 and the contact groove 14 are connected, and the electromagnetic valve 7 is opened to discharge the coolant. Therefore, the electromagnetic valve 7 at the highest temperature is opened, so that the temperature of the coolant in the cooling cavity 203 is more uniform. The adjusting rotating plate 17 is movably arranged in the air inlet hole 2061. A sliding groove 208 is arranged in the bottom wall of the air inlet hole 2061 at the bottom position of the adjusting rotating plate 17. The bottom of the adjusting rotating plate 17 is fixedly connected with an arc-shaped sleeve rod 1701, and one end of the sleeve rod 1701 is sleeved in the sliding groove 208. The support spring 20 is fixedly connected between the inner wall of the sliding groove 208 and the end surface of the sleeve rod 1701. The resistance strip 18 is fixedly arranged on the bottom wall of the air inlet hole 2061 at the opening of the sliding groove 208. The electromagnet 19 is uniformly fixedly arranged in the protective sleeve 3 corresponding to the air inlet hole 2061. The resistance strip 18 is in contact with and conducts electricity with the sleeve rod 1701. The resistance strip 18, the sleeve rod 1701 and the electromagnet 19 are linearly connected. The circuit connected by the sleeve rod 1701 and the resistance strip 18 is connected in series with the circuit of the electromagnet 19 in the opposite direction of the bottom. When the sleeve rod 1701 is in contact with the resistance strip 18 when the adjusting rotating plate 17 is in the horizontal position, the resistance of the circuit is maximum. When the tungsten electrode 4 is offset, the distance between the air inlet hole 2061 and the tungsten electrode 4 changes. The air inlet hole 2061 close to the offset side has smaller distance and larger air resistance, so that the adjusting rotating plate 17 on the side is lifted up by a distance under the action of the support spring 20, and the resistance of the circuit connected by the sleeve rod 1701 and the resistance strip 18 is reduced, and the current of the electromagnet 19 in the opposite direction of the bottom is increased, so that the magnetic force of the electromagnet 19 is increased to attract the ion arc. Therefore, the ion arc deviated due to the offset of the tungsten electrode 4 is corrected under the action of the magnetic force, so that the welding quality is ensured.

[0029] Example two

[0030] Please refer to the attached Figure 5 , attached Figure 6 , attached Figure 7 , attached Figure 8 , attached Figure 9, the middle of the air inlet hole 2061 is provided with a rotating groove 209, the rotating groove 209 movably sleeved with an adjusting shaft 21, the adjusting shaft 21 and the sleeve shaft are fixedly sleeved with a torsional spring 22, the adjusting shaft 21 is provided with a gas guide groove 2101, the opening size of the gas guide groove 2101 close to the one end of the electrode cavity 201 is same with the diameter of the air inlet hole 2061, the opening size of the gas guide groove 2101 close to the one end of the air inlet ring groove 206 is not less than twice of the opening size close to the one end of the electrode cavity 201, which ensures that the air inlet of the gas guide groove 2101 is always completely communicated with the air inlet hole 2061, and the gas outlet of the gas guide groove 2101 is used to control the air outlet, when the air pressure becomes small, the interface sealing between the gas outlet end of the gas guide groove 2101 and the air inlet hole 2061 becomes small, so that the resistance is adjusted under the driving of the torsional spring 22, the side of the adjusting shaft 21 is connected to the circuit of the electromagnet 19 through the sliding resistance, when the opening of the gas guide groove 2101 close to the one side of the electrode cavity 201 communicated to the air inlet hole 2061 becomes small, the current in the circuit of the electromagnet 19 in the opposite direction of the bottom is increased, the adjusting shaft 21 and the torsional spring 22 are designed to replace the adjusting plate 17 and the supporting spring 20, which also plays a role in adjusting the resistance in the circuit, so as to feedback to the electromagnet 19 at the bottom, so that the magnetic force generated can correct the ion arc, the size of the wind force is offset by the elasticity of the torsional spring 22, so as to stabilize the size of the interface between the gas guide groove 2101 and the air inlet hole 2061, so when the wind resistance becomes large, the adjusting shaft 21 will rotate, so that the argon gas entering the air inlet hole 2061 through the gas guide groove 2101 becomes less, so that the resistance is adjusted under the action of the torsional spring 22, and then feedback to the electromagnet 19.

[0031] The working principle is that when welding, the switch is started to introduce cooling liquid into the water inlet 5 and introduce argon into the air inlet 10, the end of the tungsten electrode 4 forms an arc at the nozzle 202, and due to the restraint, a plasma arc is generated to act on the parts to be welded. The cooling liquid entering the water inlet ring groove 204 from the water inlet 5 will impact on the baffle 601 from the side, so that the baffle 601 moves and drives the rotating ring 6 to rotate as a whole. At the same time, the cooling liquid in the water inlet ring groove 204 enters the cooling cavity 203 through the one-way valve 602. Due to the restriction of the retaining ring 2031, the cooling liquid flows downward and reaches the bottom of the cooling cavity 203, and then flows upward along the other side of the cooling cavity 203, and the inner wall of the nozzle 2 is cooled. The cooling liquid at the top of the cooling cavity 203 has a certain temperature. When the temperature of the cooling liquid at one place is higher than that at other places, the liquid column in the mercury cavity 901 will have a significantly higher rising height than that at other places. At this time, the sealing plug 902 at the top will move upward and drive the top column 12 at the top to abut against the bottom surface of the pressure plate 11, and the contact 13 and the contact groove 14 are in contact to open the corresponding electromagnetic valve 7. The cooling liquid flows out from the corresponding water outlet hole 2051 into the water outlet ring groove 205 and finally flows out from the water outlet 8 along the water outlet ring groove 205. In this process, the contact 13 at the top of the temperature tube 9 corresponding to the contact groove 14 is always in contact and the electromagnetic valve 7 is always opened to discharge the cooling liquid, so that the temperature of the cooling liquid in the cooling cavity 203 is kept uniform, avoiding the difference in the temperature of the cooling liquid in the cooling cavity 203 caused by the design of the liquid discharge port.

[0032] When the tungsten electrode 4 deviates and the ion arc formed at the bottom deviates, at this time:

[0033] Example one: the ion arc generated at the bottom of the tungsten electrode 4 deviates to one side of the tungsten electrode 4. The deviation of the tungsten electrode 4 to one side will cause the air resistance of the air inlet hole 2061 on both sides in this direction to blow the tungsten electrode 4 to be different, so that the air resistance of the air inlet hole 2061 on the deviated side of the tungsten electrode 4 becomes larger, thereby driving the adjusting rotating plate 17 to rise to a larger angle under the action of the supporting spring 20. At this time, the resistance of the resistance strip 18 connected to the sleeve rod 1701 becomes smaller, and the electromagnetic force of the electromagnet 19 in the opposite direction increases, and the attraction force of the ion arc increases, which plays a "pulling" role to make the ion arc deviate back to the middle position of the nozzle 202, ensuring the welding quality.

[0034] In the second embodiment, the ion arc generated at the bottom of the tungsten electrode 4 is offset to one side of the tungsten electrode 4, and the offset of the tungsten electrode 4 to one side causes the air resistance of the air inlet hole 2061 on both sides in this direction to be different, so that the air resistance of the air inlet hole 2061 on the side where the tungsten electrode 4 is offset becomes larger, at this time the air pressure in the air guide groove 2101 becomes smaller, under the action of the torsion spring 22 the adjusting shaft 21 is twisted to a certain extent, and the resistance adjustment is reduced, thereby the electromagnetic force of the electromagnet 19 in the opposite direction at the bottom is increased, and the attraction force of the ion arc is also increased, which will play a "pulling" effect to make the ion arc offset back to the middle position of the nozzle 202, and ensure the quality of the welding.

[0035] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives, and variations can be made in the embodiments without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A plasma welding device for hardware components, comprising a gun body (1), a spray head (2) and a protective sleeve (3), the bottom of the gun body (1) is fixedly connected with the spray head (2), and the bottom outer circle of the spray head (2) is fixedly sleeved with the protective sleeve (3), characterized in that: The middle part of the spray head (2) is provided with an electrode cavity (201), the bottom surface of the gun body (1) is fixedly provided with a tungsten electrode (4) extending into the middle part of the electrode cavity (201), the middle part of the bottom end of the spray head (2) is provided with a nozzle (202), the inner wall of the spray head (2) is provided with a cooling cavity (203), the middle part of the cooling cavity (203) is fixedly provided with a blocking ring (2031), the inner part of the spray head (2) is provided with a water inlet ring groove (204) at the outer circle position of the middle part of the cooling cavity (203), the water inlet ring groove (204) and the cooling cavity (203) are movably sleeved with a rotating ring (6), the outer wall of the rotating ring (6) is uniformly fixedly provided with a baffle (601), the inner wall of the rotating ring (6) is fixedly provided with a check valve (602) between adjacent baffles (601), the outer wall of the spray head (2) is provided with a water inlet (5) at the same height of the water inlet ring groove (204) and in communication with the water inlet ring groove (204), the inner part of the spray head (2) is provided with a water outlet ring groove (205) at the outer circle position of the top of the cooling cavity (203) and in communication with the water outlet ring groove (205), the outer wall of the spray head (2) is provided with a water outlet (8) at the same height of the water outlet ring groove (205) and in communication with the water outlet ring groove (205), the top end of the spray head (2) is provided with an air inlet ring groove (206), the inner part of the spray head (2) is provided with an air inlet hole (2061) between the air inlet ring groove (206) and the electrode cavity (201), the air inlet hole (2061) is provided with a rotating adjusting switch, and the outer wall of the spray head (2) is provided with an air inlet (10) at the same height of the air inlet ring groove (206) and in communication with the air inlet ring groove (206). The adjusting rotating plate (17) is movably arranged in the air inlet hole (2061), a sliding groove (208) is arranged in the bottom wall of the air inlet hole (2061) and located at the bottom of the adjusting rotating plate (17), the bottom of the adjusting rotating plate (17) is fixedly connected with an arc-shaped sleeve rod (1701), one end of the sleeve rod (1701) is sleeved in the sliding groove (208), the support spring (20) is fixedly connected between the inner wall of the sliding groove (208) and the end surface of the sleeve rod (1701), the electric resistance strip (18) is fixedly arranged in the bottom wall of the air inlet hole (2061) and located at the opening of the sliding groove (208), the electromagnet (19) is fixedly arranged in the protective sleeve (3) and corresponds to the air inlet hole (2061), the electric resistance strip (18) is in contact with and conducts electricity with the sleeve rod (1701), the electric resistance strip (18), the sleeve rod (1701) and the electromagnet (19) are linearly connected, the circuit formed by the sleeve rod (1701) and the electric resistance strip (18) is connected in series with the circuit of the electromagnet (19) in the opposite direction of the bottom, when the adjusting rotating plate (17) is in the horizontal position, the sleeve rod (1701) is in contact with the electric resistance strip (18), so that the resistance of the circuit is maximum, or a rotating groove (209) is arranged in the middle of the air inlet hole (2061), the adjusting rotating shaft (21) is movably sleeved in the rotating groove (209), the torsional spring (22) is fixedly sleeved between the adjusting rotating shaft (21) and the sleeving shaft, the gas guide groove (2101) is arranged in the adjusting rotating shaft (21), the opening of the gas guide groove (2101) close to the electrode cavity (201) is the same in size as the diameter of the air inlet hole (2061), the opening of the gas guide groove (2101) close to the air inlet ring groove (206) is not less than twice the size of the opening close to the electrode cavity (201), the side of the adjusting rotating shaft (21) is connected to the circuit of the electromagnet (19) through the sliding resistance, when the opening of the gas guide groove (2101) close to the electrode cavity (201) is communicated to the air inlet hole (2061), the current in the circuit of the electromagnet (19) in the opposite direction of the bottom is increased. The water inlet (5), water outlet (8) and air inlet (10) are tangentially communicated to the water inlet ring groove (204), water outlet ring groove (205) and air inlet ring groove (206) respectively, the cooling cavity (203) and water outlet ring groove (205) are provided with a water outlet hole (2051), the water outlet hole (2051) is fixedly installed with an electromagnetic valve (7), the cooling cavity (203) is fixedly installed with a temperature tube (9) at the position corresponding to the opening of the water outlet hole (2051), the temperature tube (9) is provided with a mercury cavity (901) inside, the nozzle (2) is provided with an adjusting ring groove (207) at the top of the temperature tube (9), the adjusting ring groove (207) is movably sleeved with a pressure plate (11), the adjusting ring groove (207) is movably installed with a top column (12), the mercury cavity (901) is movably sleeved with a sealing plug (902) at the top, the bottom of the top column (12) is fixedly connected with the top end of the sealing plug (902), the outer circle of the top column (12) and the inner wall of the adjusting ring groove (207) are fixedly connected with a bellows (15), the top of the pressure plate (11) and the top wall of the adjusting ring groove (207) are fixedly installed with a pressure spring (16), the top of the top column (12) is provided with a contact groove (14), the bottom of the pressure plate (11) is provided with a contact head (13) corresponding to the contact groove (14), the mercury cavity (901) is filled with mercury, and the outer wall of the temperature tube (9) is made of a good conductor, the pressure plate (11) slides vertically in the adjusting ring groove (207), and the contact head (13) and the contact groove (14) are in contact to connect the switch corresponding to the electromagnetic valve (7).

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