Multifunctional spray gun

Abstract

The multifunctional spray gun comprises a gun handle and a gun barrel, the gun barrel comprises a diffusion section, a throat neck section and a metal powder spray pipe which are integrally formed, one end of the diffusion section is connected with the throat neck section, and the other end of the diffusion section is connected with an oxygen outlet in the gun handle; a nozzle is arranged at the end, away from the diffusion section, of the throat neck section. The metal powder spraying pipe penetrates through the gun handle from the top of the gun handle and extends to the nozzle; the spray head is arranged at one end of the metal powder spray pipe, which is positioned at the nozzle, and adopts a detachable structure, the diameter of the spray head is slightly larger than that of the spray pipe and smaller than that of the nozzle; and a water-cooling protective jacket is fixedly sleeved outside the gun barrel. According to the multifunctional spray gun, the types of gas and metal powder entering the spray pipe can be changed according to purposes, and whether the water cooling protection function is started or not is selected according to application scenes, so that the multifunctional spray gun has multiple functions of welding, cutting, metal powder feeding and the like, is good in heat conductivity and long in service life, and is particularly suitable for being used in a high-temperature environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to reactor internal powder material feeding system field and welding, cutting device field, concretely relates to a multifunctional spray gun. BACKGROUND

[0002] The spray gun is a kind of commonly used equipment using the release function of liquid or compressed gas (such as oxygen or oxygen) as power. According to use, there are paint spray gun, powder spray gun, denitration spray gun, fire spray gun (flame gun), glue spray gun and hot air spray gun etc. For example, Chinese patent CN 2548750 Y discloses a welding and cutting device, in particular to a high-pressure combustion-supporting gas container of gas cylinder, and uses a pressure booster to fill gas pressure to make liquid be transported to spray gun or flame generator through pipeline to be mixed and ignited, and high-temperature flame gas flow is generated for welding or cutting. The cover body locked in the container filler hole has an induction assembly, which can gradually release the gas pressure in the container exceeding the safety index, and can also control the gas nozzle with rod, solenoid valve and other objects to automatically or semi-automatically perform rapid air intake and exhaust, so that the container maintains a certain gas pressure, and liquid is transported from the output pipe to the head end of the flame generator or spray gun for atomization mixing. Through the vaporization or homogenization structure of each nozzle, more uniform gas flow is provided to form high-temperature flame gas flow for melting welding or melting cutting. For example, Chinese patent CN205020282 U discloses a denitration anti-blocking spray gun, which comprises a mixer, a gun barrel, a spray gun sheath and a spray head. A sealing sleeve is arranged at the lower end of the spray gun sheath, and an emptying valve channel is arranged on the lower end side wall of the spray gun sheath. A flushing water pipeline is arranged on the outer side of the spray gun sheath along its axial direction. The upper end of the flushing water pipeline is annular, and is sleeved on the upper end of the spray gun sheath. A plurality of radially extending spray pipes are uniformly distributed along the circumference of the annular part, and extend into the spray gun sheath, so that the spray pipes are arranged above the spray head. The end of the spray pipe is inclined from bottom to top, and a spray hole is arranged on the inclined surface. The flushing pipeline is added to the spray gun sheath, and the inside of the spray gun, especially the spray head, is periodically flushed, so that the internal dust is discharged through the emptying valve channel, which not only cleans the spray gun, but also has the effect of cooling, avoiding the defects of unstable efficiency of denitration system caused by manual cleaning of spray gun, and ensuring the continuous and stable work of the spray system.

[0003] In the prior art, spray guns are specialized tools with limited application scenarios. Workers need to carry multiple tools for each construction job, making them inconvenient. Chinese Patent CN 202521607 U discloses a dual-purpose welding and cutting spray gun, comprising a nozzle, a mixed gas pipe, an oxygen pipe, a first oxygen control valve, a second oxygen control valve, a mixed gas control valve, an oxygen inlet, an acetylene inlet, and a gas mixing zone. The oxygen inlet is divided into two routes: one connects to the oxygen pipe through the first oxygen control valve, and the other directly enters the gas mixing zone. The gas mixing zone also connects to the acetylene inlet and the mixed gas control valve. The other end of the mixed gas control valve is connected to the mixed gas pipe, which then intersects with the oxygen pipe at the nozzle. This dual-purpose welding and cutting spray gun controls the amount of oxygen entering the mixed gas pipe by adjusting the second oxygen control valve at the mixed gas pipe inlet, thereby controlling the ratio of acetylene to oxygen in the mixed gas. By closing the first oxygen control valve at the oxygen pipe inlet and adjusting the second oxygen control valve at the mixed gas pipe inlet, the mixed gas ratio can be adjusted to suit gas welding. This patent integrates welding and cutting functions, providing a valuable insight into the development of multifunctional spray guns. However, this patent is only suitable for welding and cutting work scenarios, and its application expansion is extremely limited. Summary of the Invention

[0004] In order to solve the technical problem in the prior art that the spray gun is a special tool with a single application scenario, and workers need to carry multiple tools during construction, which is very inconvenient to use, the present invention provides a multifunctional spray gun.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0006] A multifunctional spray gun comprises a gun handle and a gun barrel connected to the gun handle via a fixing flange;

[0007] An oxygen buffer chamber is provided inside the gun handle, and the gas outlet of the oxygen buffer chamber adopts a venturi tube structure, an oxygen inlet is provided on the side thereof, and an oxygen outlet at the bottom is connected to the upper opening of the gun barrel;

[0008] The gun barrel includes an integrally formed diffuser section, a throat section, and a metal powder nozzle. One end of the diffuser section is connected to the throat section, and the other end is connected to the oxygen outlet of the gun handle. A nozzle is provided at the end of the throat section away from the diffuser section. The metal powder nozzle extends from the top of the gun handle through the gun handle within the gun barrel to the nozzle.

[0009] The metal powder nozzle is located at the top of the gun handle and is provided with a combustible gas inlet and a metal powder feed inlet, and a nozzle is provided at one end of the nozzle;

[0010] A water-cooling protection jacket is fixedly mounted on the outside of the gun barrel.

[0011] The diffuser and throat sections of the barrel are both hollow frustum structures, and the inner diameter of one end of the throat section where the nozzle is located is smaller than the inner diameter of the other end. Preferably, the inner layer of the barrel wall is a high-temperature resistant lining, the outer surface of which is spray-welded with a high-temperature resistant alloy material.

[0012] The water-cooling protective jacket utilizes a coil water-cooling structure made of cast copper coils. Preferably, the water-cooling protective jacket comprises a double-layer water piping structure axially disposed along the outer side of the barrel. The upper end of the double-layer water piping is annular and fixedly sleeved onto the upper end of the barrel's diffuser. Multiple radially extending water inlets and outlets are evenly distributed along the circumference of the annular portion. The water inlet and outlet layers of the double-layer water piping connect at the bottom of the nozzle.

[0013] The nozzle is detachable and has an arc-shaped end with multiple nozzle holes evenly distributed on the arc-shaped structure. Preferably, the nozzle has a diameter slightly larger than the nozzle diameter but smaller than the nozzle aperture, and the nozzle slightly extends out of the nozzle.

[0014] Furthermore, in the above technical solution, the exterior of the nozzle is built-up with copper alloy, thereby making the multifunctional spray gun of the present invention suitable for use in high-temperature environments and extending the service life of the gun barrel.

[0015] Furthermore, in the above technical solution, the gun handle is made of C276 alloy or 310SS stainless steel.

[0016] Furthermore, in the above technical solution, a gun body fixing device is provided on the outside of the gun barrel, so that the multifunctional spray gun can be conveniently fixed during use, thereby avoiding burns to the operator when used in a high temperature environment.

[0017] Compared with the prior art, the multifunctional spray gun of the present invention has the following beneficial effects: first, it can, according to the needs of the purpose and application environment, change the gas and metal powder type entering the nozzle, and choose whether to turn on the water cooling protection function, so as to play a variety of functions such as welding, cutting, metal powder spraying, painting, and denitrification. In addition, the oxygen outlet of the oxygen buffer chamber and the end of the throat section near the nozzle are designed with a Venturi tube structure, which can provide a material flow with a more uniform mixing ratio, effectively preventing the problem of easy clogging when used as a welding or metal powder spraying tool, and ensuring the continuous and stable operation of the welding flux or metal powder. In addition, the nozzle of the multifunctional spray gun of the present invention adopts a detachable structure, which can be conveniently replaced with different models of nozzles according to the needs of different working environments. In addition, the nozzle of the multifunctional spray gun of the present invention is welded with copper alloy on the outside, so that the multifunctional spray gun of the present invention can be suitable for high temperature environment conditions, extending the service life of the barrel, making it particularly suitable for use in high temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the multifunctional spray gun of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of the fixed flange 4 in the present invention;

[0020] Figure 3 for Figure 1 A partial enlarged view of structure I;

[0021] Figure 4 for Figure 1 A partial enlarged view of structure II;

[0022] Reference numerals: In the figure, 1-gun handle; 2-oxygen inlet; 3-oxygen buffer chamber; 4-fixing flange; 5-gun barrel; 6-water outlet; 7-gun body fixing device; 8-water cooling protection jacket; 9-nozzle; 10-diffuser; 11-throat section; 12-nozzle; 13-nozzle head; 14-water inlet; 15-combustible gas inlet; 16-metal powder feed port; I- Figure 1 Local structure in the middle circle; Ⅱ- Figure 1 Local structure within the middle circle. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some illustrative implementation methods of the present invention, and do not represent all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative positional relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] See the utility model Figure 1 、 Figure 2 The multifunctional spray gun of the present invention comprises a gun handle 1 and a gun barrel 5, which are fixed as a whole by a fixing flange 4. The inner layer of the barrel wall of the gun barrel 5 is a high temperature resistant lining, and the outer side of the high temperature resistant lining is spray-welded with a high temperature resistant alloy material.

[0027] like Figure 2 As shown, in the multifunctional spray gun of the present invention, a hollow oxygen buffer chamber 3 is provided inside the gun handle 1, an oxygen inlet 2 is provided on the side, and an oxygen outlet at the bottom is connected to the gun barrel 5. The gun handle 1 is preferably made of C276 alloy or 310SS stainless steel.

[0028] like Figure 2 As shown, in the multifunctional spray gun of the present invention, the barrel 5 includes an integrally formed diffuser section 10, a throat section 11, and a metal powder nozzle 9. One end of the diffuser section 10 is connected to the throat section 11, and the other end is connected to the oxygen outlet of the gun handle 1. A nozzle 12 is provided at the end of the throat section 11 away from the diffuser section 10. The metal powder nozzle 9 extends from the top of the gun handle 1 through the gun handle 1 within the barrel 5 to the nozzle 12.

[0029] like Figure 2 As shown, in the multifunctional spray gun of the present invention, a combustible gas inlet 15 and a metal powder feed port 16 are disposed at the top of the metal powder nozzle 9, located above the gun handle. One end of the metal powder nozzle 9 is the feed end, where the combustible gas inlet 15 and the metal powder feed port 16 are located, while the other end is the spray end, where a nozzle 13 is located. The nozzle 13 is disposed at one end of the nozzle 12 and slightly extends beyond the nozzle 12. The diameter of the nozzle 13 is slightly larger than that of the nozzle 9 but smaller than the caliber of the nozzle 12. This ensures that the mixture of oxygen, metal powder, and combustible gas is evenly mixed near the nozzle 12 opening, resulting in high-temperature combustion and melting.

[0030] When the multifunctional spray gun of the present invention is used for welding, the flux metal powder can be pneumatically carried to the nozzle 13 by the combustible gas (such as methane, hydrogen, etc.) introduced through the combustible gas inlet 15 and uniformly sprayed out from the nozzle 13. The flux metal powder then burns and melts with the oxygen from the oxygen inlet 2 at a high temperature, thereby achieving the metal welding process.

[0031] A preferred embodiment is that the nozzle 13 adopts a detachable structure, thereby facilitating the replacement of different models of nozzles 13 according to the needs of different working environments. Of course, as a further preferred embodiment, the end of the nozzle 13 has an arcuate surface structure, and multiple nozzle holes are evenly distributed on the arcuate surface structure, thereby ensuring the uniform discharge of the metal powder and improving its combustion efficiency after contact with oxygen. In addition, in the technical solution of the present utility model, the diffuser section 10 and the throat section 11 of the gun barrel 5 are both hollow frustum structures, and the inner diameter of one end of the throat section 11 where the nozzle 12 is located is smaller than the inner diameter of the other end, that is, a Venturi tube structure is adopted.

[0032] By adopting the above-mentioned unique structural design, when the multifunctional spray gun of the present invention is used for cutting purposes, there is no need to add flux metal powder. Only combustible gas (such as acetylene, etc.) needs to be introduced from the combustible gas inlet 15. The combustible gas and oxygen from the oxygen inlet 2 burn at a high temperature to generate a high-temperature flame, thereby melting the place where the metal surface being processed contacts the flame, thereby realizing the metal cutting process.

[0033] It is well known to those skilled in the art that during the welding process, the temperature of the welding material or welding electrode needs to be raised to above its melting point to allow it to fuse, and then allowed to cool and solidify to achieve the purpose of connecting metal objects. The welding temperature needs to be controlled during this process, because too high or too low a welding temperature will affect the welding quality. Therefore, when used as a welding tool, the working temperature of the nozzle is usually higher than the cutting temperature, so the nozzle and the nozzle are very easy to mutate or be damaged. For this reason, the multifunctional spray gun of the present invention has further optimized the design of a special nozzle structure, and copper alloy is welded on the outside of the nozzle 12; at the same time, a water-cooling protection jacket 8 is fixedly mounted on the outside of the gun barrel 5, so that the working temperature of the nozzle can be quickly reduced by using the water-cooling protection device, making it more suitable for high-temperature working environments.

[0034] A preferred embodiment is that the water-cooling protective jacket 8 adopts a coil water-cooling structure, and the material is cast copper coil.A more specific embodiment is that the water-cooling protective jacket 8 is arranged as a double-layer water pipe structure arranged along the axis of the outer side of the lance barrel 5; the upper end of the double-layer water pipe is annular, is sleeved on the upper end of the diffusion section 10 of the lance barrel 5, and a plurality of radially extending water inlets 13 and water outlets 6 are arranged on the annular portion in a circumferential distribution manner; the water inlet layer and the water outlet layer of the double-layer water pipe are communicated at the bottom of the nozzle 12.When the multifunctional spray gun of the utility model is used as a welding tool, cooling water is first introduced into the water inlet layer through the water inlet 14, the water flow flows downward along the spray pipe 9, carries away the heat of the nozzle 12, and the cooling water after absorbing heat flows out through the water outlet 6 in the upward direction along the spray pipe 9, so that the working temperature of the nozzle 12 is rapidly reduced, and the nozzle 12 is more suitable for a high-temperature working environment.

[0035] As a preferred embodiment, the outer side of the lance barrel is provided with a gun body fixing device 7, so that the multifunctional spray gun of the utility model can be conveniently fixed at a fixed position of an application site during use, and the operator is prevented from being burned when used in a high-temperature environment.

[0036] In summary, the multifunctional spray gun of the utility model can provide a material flow with more uniform mixing ratio, effectively prevents the problem that the spray gun is easily blocked when used as a welding or metal powder spraying tool, ensures continuous and stable work of the welding agent or metal powder, and has the advantages of good heat conductivity and long service life.

[0037] Although the embodiments of the utility model have been shown and described above, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model. Therefore, it can be understood that any modification, equivalent replacement, improvement, etc. made under the principles and spirits of the embodiments belongs to the protection scope of the utility model.

Claims

1. A multifunctional spray gun comprising a gun handle (1) and a gun barrel (5) connected to the gun handle (1) via a fixing flange (4), characterized in that: An oxygen buffer chamber (3) is provided inside the gun handle (1), and a gas outlet of the oxygen buffer chamber (3) adopts a venturi tube structure, an oxygen inlet (2) is provided on the side thereof, and an oxygen outlet at the bottom is connected to the upper opening of the gun barrel (5); The gun barrel (5) comprises an integrally formed diffusion section (10), a throat section (11) and a metal powder nozzle (9), one end of the diffusion section (10) is connected to the throat section (11); a nozzle (12) is provided at the end of the throat section (11) away from the diffusion section (10); the metal powder nozzle (9) extends from the top of the gun handle (1) through the gun handle (1) inside the gun barrel (5) to the nozzle (12); a combustible gas inlet (15) and a metal powder feed port (16) are provided at the top end of the metal powder nozzle (9) located at the upper part of the gun handle (1), and a nozzle (13) is provided at one end of the nozzle (12); a water-cooling protective jacket (8) is also fixedly provided on the outside of the gun barrel (5).

2. The multifunctional spray gun according to claim 1, characterized in that: The diffusion section (10) and the throat section (11) of the gun barrel (5) are both hollow frustum structures, and one end of the throat section (11) is provided with a nozzle (12) to form a Venturi tube structure.

3. The multifunctional spray gun according to claim 2, characterized in that: The inner layer of the barrel wall of the gun barrel (5) is a high-temperature resistant lining, and the outer side of the high-temperature resistant lining is spray-welded with a high-temperature resistant alloy material.

4. The multifunctional spray gun according to claim 1, wherein: The water-cooling protective jacket (8) adopts a coil water-cooling structure and is made of cast copper coil.

5. The multifunctional spray gun according to claim 4, characterized in that: The water-cooling protection jacket (8) is a double-layer water pipeline structure arranged axially along the outer side of the gun barrel (5); the upper end of the double-layer water pipeline is annular and fixedly sleeved on the upper end of the diffusion section (10) of the gun barrel (5), and a plurality of radially extending water inlets (14) and water outlets (6) are evenly distributed along the circumference of the annular portion, and the water inlet layer and the water outlet layer of the double-layer water pipeline are connected at the bottom of the nozzle (12).

6. The multifunctional spray gun according to claim 1, characterized in that: The nozzle (13) adopts a detachable structure, and its end is an arc-shaped surface structure, and a plurality of spray holes are evenly distributed on the arc-shaped surface structure.

7. The multifunctional spray gun according to claim 6, characterized in that: The diameter of the nozzle (13) is slightly larger than the diameter of the nozzle (9) and smaller than the caliber of the nozzle (12), and the nozzle (13) slightly extends out of the nozzle (12).

8. The multifunctional spray gun according to any one of claims 1 to 6, characterized in that: The outside of the nozzle (12) is welded with copper alloy.

9. The multifunctional spray gun according to any one of claims 1 to 6, characterized in that: The gun handle (1) is made of C276 alloy material or 310SS stainless steel material.

10. The multifunctional spray gun according to any one of claims 1 to 6, characterized in that A gun body fixing device (7) is provided on the outside of the gun barrel (5).

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