Spray gun with self-cleaning effect for brazing flux spraying production line

Abstract

The utility model discloses a spray gun with a self-cleaning effect for a brazing flux spraying production line, which relates to the technical field of spraying spray guns, and comprises a shell, a sleeve penetrates through the top end of the shell, an air inlet pipe is arranged at the top of the sleeve, a solvent inlet pipe penetrates through one side wall of the sleeve, a transverse pipe is clamped at one end of the solvent inlet pipe, and the other end of the transverse pipe is provided with an air inlet pipe. Two droppers penetrate through the bottom end of the transverse pipe, a soldering flux inlet pipe penetrates through one side wall of the shell, a spray head is fixedly installed at the bottom end of the shell, a chuck is arranged at the bottom of the spray head, an air suction pipe penetrates through one side of the top end of the chuck, and a second cavity is formed in the chuck. By arranging a series of structures, residual soldering flux in the spray gun can be effectively removed, so that the probability that the spray head is blocked due to the fact that the soldering flux is remained in the spray head is reduced, the atomized soldering flux can be recycled, and meanwhile, the atomized soldering flux adhered to the outer wall of the spray gun is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a spray gun for a brazing flux spraying production line with a self-cleaning effect. Background Art

[0002] Brazing flux is a flux used in brazing. It needs to be sprayed on the surface of the base material using a spray gun or other tools before brazing. Its function is to remove oxides on the surface of the base material and the brazing filler metal, and improve the wettability of the brazing filler metal to the base material during the heating process. At the same time, it can effectively dissolve or destroy the oxide film on the surface of the weldment and the brazing filler metal.

[0003] However, when using the spray gun for the existing flux spraying production line, since the flux is divided into soft flux and hard flux, and the hard flux contains hard particles such as borax, if it is not cleaned thoroughly, it is easy to form residues in the spray gun, which will cause clogging of the nozzle. In addition, when the flux is atomized and sprayed onto the surface of the base material using the spray gun, the atomized flux is light in weight and will float inside the device housing where the spray line is located, making it difficult to recycle. At the same time, the misted flux may also adhere to the outer wall of the spray gun, affecting the use of the spray gun. Utility Model Content

[0004] The purpose of the utility model is to provide a spray gun for a flux spraying production line with a self-cleaning effect, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a spray gun for a flux spraying production line with a self-cleaning effect, comprising a shell, a sleeve passing through the top of the shell, an air inlet pipe being provided on the top of the sleeve, a solvent inlet pipe passing through a side wall of the sleeve, a horizontal pipe being engaged with one end of the solvent inlet pipe, two droppers being passed through the bottom end of the horizontal pipe, a flux inlet pipe being passed through a side wall of the shell, a nozzle being fixedly mounted on the bottom end of the shell, a chuck being provided at the bottom of the nozzle, an air intake pipe being passed through one side of the top of the chuck, a second cavity being provided inside the chuck, a plurality of through holes being provided at the bottom end of the chuck, and a bent pipe being passed through one side of the bottom end of the chuck.

[0006] Preferably, the bottom end of the air intake pipe is fixedly connected with a connecting tube, and the air intake pipe is connected to the top end of the sleeve by threaded engagement through the connecting tube.

[0007] Preferably, a first cavity is opened inside the shell, the sleeve is communicated with the interior of the first cavity, and the first cavity is communicated with the interior of the nozzle and the flux inlet pipe.

[0008] Preferably, a threaded barrel is embedded in the middle of the chuck, and the chuck is connected to the nozzle through a movable threaded sleeve via the threaded barrel.

[0009] Preferably, the interior of the curved pipe is communicated with the interior of the second cavity, and the bottom end of the curved pipe is movably connected to the bottom end of the nozzle via a chuck.

[0010] Preferably, the transverse tube and the dropper are both located inside the sleeve.

[0011] Preferably, the interior of the air intake pipe is communicated with the interior of the second cavity.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The spray gun for the flux spraying production line with a self-cleaning effect allows a solvent that can effectively remove the flux to enter the spray gun through a sleeve, a solvent inlet pipe, a cross pipe and a dropper. In addition to being blown out by the airflow, the flux remaining in the spray gun can also further react with the entering solvent, thereby facilitating the removal of the flux remaining in the spray gun and reducing the probability of flux remaining in the nozzle causing nozzle clogging.

[0014] 2. The spray gun for the flux spraying production line with a self-cleaning effect, through the chuck, suction pipe, second cavity and through hole, allows the atomized flux that has not come into contact with the surface of the base material after being sprayed from the nozzle and has drifted to the nozzle to be sucked into the chuck by negative pressure for collection. At the same time, after the spray gun is stopped, the flux droplets remaining at the opening at the bottom end of the nozzle can also be sucked into the chuck by the extended elbow, thereby realizing the recycling of the atomized flux and reducing the amount of flux mist adhering to the outer wall of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the first cavity and the second cavity of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the air intake pipe and solvent inlet pipe of the utility model;

[0018] Figure 4 This is a schematic diagram of the chuck and elbow structure of the utility model.

[0019] In the figure: 1. air inlet pipe; 2. sleeve; 3. solvent inlet pipe; 4. shell; 5. flux inlet pipe; 6. chuck; 7. suction pipe; 8. elbow; 9. nozzle; 10. horizontal pipe; 11. dropper; 12. first cavity; 13. second cavity; 14. through hole; 15. threaded barrel. DETAILED DESCRIPTION

[0020] The following will be combined with the 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1 to 4 As shown, the spray gun for the flux spraying production line with a self-cleaning effect in this embodiment includes a shell 4, a sleeve 2 is penetrated at the top of the shell 4, an air inlet pipe 1 is provided at the top of the sleeve 2, a solvent inlet pipe 3 is penetrated at one side wall of the sleeve 2, a transverse pipe 10 is clamped at one end of the solvent inlet pipe 3, two droppers 11 are penetrated at the bottom end of the transverse pipe 10, a flux inlet pipe 5 is penetrated at one side wall of the shell 4, a nozzle 9 is fixedly mounted at the bottom end of the shell 4, a chuck 6 is provided at the bottom of the nozzle 9, an air intake pipe 7 is penetrated at one side of the top of the chuck 6, a second cavity 13 is opened inside the chuck 6, a plurality of through holes 14 are opened at the bottom end of the chuck 6, and a bend pipe 8 is penetrated at one side of the bottom end of the chuck 6.

[0024] Specifically, the spray gun housing 4 is installed in the spraying device on the flux spraying production line, so that the spray gun can be in a relatively closed environment, reducing the probability of the atomized flux sprayed by the spray gun floating out of the device, which is conducive to the collection of the mist flux, and the interior of the sleeve 2 is provided with an inner cavity channel, so that the airflow in the air inlet pipe 1 can pass through the sleeve 2 into the first cavity 12 of the housing 4, thereby realizing the airflow blowing the flux entering the first cavity 12, and the top of the air inlet pipe 1 is connected to the output end of the air compressor, so that the interior of the air inlet pipe 1 can pass into the high-speed airflow, thereby facilitating the flux in the first cavity 12 to be blown out from the nozzle 9, and the solvent inlet pipe 3 allows the solvent that can dissolve the flux to enter the first cavity 12, and the residual flux in the first cavity 12 is cleaned in time, thereby reducing the internal of the spray gun. As well as the probability of blockage at the nozzle 9, the function of the transverse tube 10 is to enable the solvent to move along the transverse tube 10 to the middle of the sleeve 2 after entering the sleeve 2, which is conducive to the airflow blowing the solvent into the first cavity 12 when passing through the middle of the sleeve 2, thereby cleaning the residual flux in the first cavity 12, and the nozzle 11 is vertically downward, which is conducive to the solvent entering the first cavity 12. The diameter of the chuck 6 is larger than the outer diameter of the nozzle 9. Its main function is to block the mist flux that floats up after being sprayed from the nozzle 9, and at the same time promote the mist flux to enter the through hole 14 at the bottom of the chuck 6, thereby realizing the recovery of the mist flux. The center of the bottom end of the chuck 6 is recessed toward the inner side of the chuck 6, so that the interior of the second cavity 13 can be high in the middle and low on both sides, which is conducive to the temporary storage of the collected mist flux.

[0025] Furthermore, the bottom end of the air intake pipe 1 is fixedly connected to a connecting tube, and the air intake pipe 1 is threadedly engaged with the top end of the sleeve 2 through the connecting tube, so that the air intake pipe 1 can be easily removed from the top of the sleeve 2, thereby facilitating subsequent cleaning and disassembly of the spray gun.

[0026] Furthermore, a first cavity 12 is opened inside the shell 4, the sleeve 2 is communicated with the interior of the first cavity 12, the first cavity 12 is communicated with the interior of the nozzle 9 and the flux inlet pipe 5, and the function of the first cavity 12 is to provide space for mixing the flux and the high-speed airflow, thereby facilitating the mixing of the flux in the first cavity 12.

[0027] Furthermore, a threaded barrel 15 is embedded in the middle of the chuck 6, and the chuck 6 is connected to the nozzle 9 through a movable threaded sleeve through the threaded barrel 15. The threaded barrel 15 makes it easy to remove the chuck 6 from the bottom of the nozzle 9, thereby facilitating the cleaning of the surface of the chuck 6 or replacing the chuck 6.

[0028] Furthermore, the interior of the elbow 8 is communicated with the interior of the second cavity 13, and the bottom end of the elbow 8 is movably connected to the bottom end of the nozzle 9 through the chuck 6. The elbow 8 can bring the negative pressure generated in the second cavity 13 close to the nozzle of the nozzle 9, so that the mist flux dripping from the bottom end of the nozzle 9 can be recovered.

[0029] Furthermore, the transverse tube 10 and the dropper 11 are both located inside the sleeve 2 , so that the solvent entering from the solvent inlet tube 3 can smoothly enter the first cavity 12 , thereby facilitating the solvent to contact and react with the residual flux remaining in the shell 4 and the nozzle 9 .

[0030] Furthermore, the interior of the intake pipe 7 is communicated with the interior of the second cavity 13, and an air pump is installed and connected to the end of the intake pipe 7, so that the intake pipe 7 can suck away the air in the second cavity 13, so that negative pressure is generated in the second cavity 13, prompting negative pressure to be generated at the bottom end of the bent pipe 8 and near the through hole 14, thereby achieving the cleaning of the mist particles.

[0031] The method of use of this embodiment is as follows: when using a spray gun for a flux spraying production line with a self-cleaning effect, it is necessary to first install and fix the shell 4 of the spray gun inside the spraying device. When the spray gun starts to start, a high-speed airflow will be pumped into the air inlet pipe 1, and the airflow will pass through the sleeve 2 into the first cavity 12. At the same time, a flux solution will also be introduced into the flux inlet pipe 5. Then, the flux will enter the first cavity 12, and the high-speed airflow flowing in the first cavity 12 will be carried to the nozzle 9, and then sprayed out from the nozzle 9. When it is necessary to clean the first cavity 12 and the nozzle 9 inside the spray gun, a solvent is introduced into the solvent inlet pipe 3. , then the solvent will flow along the horizontal tube 10, and then drip out from the dropper 11 at the bottom end of the horizontal tube 10, and then under the action of the high-speed airflow, the solvent for removing the flux will enter the first cavity 12 and the nozzle 9 in turn, and the flux remaining in the first cavity 12 and the nozzle 9 will be removed. In the process of spraying, the suction pipe 7 will be under the action of the air pump to pump the interior of the chuck 6 into a negative pressure, so that the upward-floating mist spray can be sucked into the second cavity 13 in the cartridge through the through hole 14. At the same time, the bent pipe 8 can also suck the flux droplets remaining at the bottom end of the nozzle 9 into the second cavity 13 for collection.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A spray gun for a flux spraying production line having a self-cleaning effect, comprising a housing (4), characterized in that: The top of the shell (4) is penetrated by a sleeve (2), the top of the sleeve (2) is provided with an air inlet pipe (1), a side wall of the sleeve (2) is penetrated by a solvent inlet pipe (3), one end of the solvent inlet pipe (3) is engaged with a transverse pipe (10), the bottom end of the transverse pipe (10) is penetrated by two droppers (11), a side wall of the shell (4) is penetrated by a flux inlet pipe (5), the bottom end of the shell (4) is fixedly mounted with a nozzle (9), the bottom of the nozzle (9) is provided with a chuck (6), one side of the top of the chuck (6) is penetrated by an air intake pipe (7), a second cavity (13) is provided inside the chuck (6), a plurality of through holes (14) are provided at the bottom end of the chuck (6), and a bent pipe (8) is penetrated by one side of the bottom end of the chuck (6).

2. The spray gun for a flux spraying production line with a self-cleaning effect according to claim 1, characterized in that: The bottom end of the air intake pipe (1) is fixedly connected to a connecting tube, and the air intake pipe (1) is threadedly engaged with the top end of the sleeve (2) via the connecting tube.

3. The spray gun for a flux spraying production line with a self-cleaning effect according to claim 1, characterized in that: A first cavity (12) is provided inside the shell (4), the sleeve (2) is communicated with the interior of the first cavity (12), and the first cavity (12) is communicated with the interior of the nozzle (9) and the flux inlet pipe (5).

4. The spray gun for a flux spraying production line with a self-cleaning effect according to claim 1, characterized in that: A threaded barrel (15) is embedded in the middle of the chuck (6), and the chuck (6) is connected to the nozzle (9) through a movable thread sleeve via the threaded barrel (15).

5. The spray gun for a flux spraying production line with a self-cleaning effect according to claim 1, characterized in that: The interior of the curved pipe (8) is communicated with the interior of the second cavity (13), and the bottom end of the curved pipe (8) is movably connected to the bottom end of the nozzle (9) via a chuck (6).

6. The spray gun for a flux spraying production line with a self-cleaning effect according to claim 1, characterized in that: The transverse tube (10) and the dropper (11) are both located inside the sleeve (2).

7. The spray gun for a flux spraying production line with a self-cleaning effect according to claim 1, characterized in that: The interior of the air intake pipe (7) is communicated with the interior of the second cavity (13).

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