Pneumatic spraying gun

Abstract

The utility model discloses a pneumatic spraying gun, and relates to the technical field of pneumatic spraying guns, in particular to a pneumatic spraying gun, which comprises a gun body, a trigger is movably sleeved outside the gun body, an air supply cavity is arranged in a handle inside the gun body, a mixed spraying cavity is arranged at the front end of an inner cavity of the gun body, and a spray gun is arranged in the mixed spraying cavity. An air pressure cavity is formed in the upper portion, close to the rear end, of an inner cavity of the gun body. According to the pneumatic spraying gun, the flow dividing cavity is formed in the gun body, the lower portion of the flow dividing cavity is connected with the air supply cavity through the air supply channel, and meanwhile air can be conveyed to the inner cavity of the air pressure cavity and the inner cavity of the mixed spraying cavity through the rear flow dividing channel and the front flow dividing channel above the flow dividing cavity; the nozzle is simple in structure and convenient to clean, meanwhile, the interior of the mixing cavity can be quickly cleaned, and the use convenience can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic spraying guns, and particularly relates to a pneumatic spraying gun. Background Technique

[0002] Pneumatic spray gun: A spraying tool that uses compressed air to atomize paint into fine paint droplets and sprays them onto the surface of the object to be painted under the drive of air flow. It is divided into suction spray guns, gravity spray guns, and pressure-feed spray guns. The first two are siphon paint supply types. The air flow generates low pressure at the nozzle end face, sucking the paint to the nozzle for atomization and spraying. The paint pot of the suction type is located below the nozzle, and the paint pot of the gravity type is located above the nozzle. When the paint is viscous or continuous spraying of a large area is required, a pressure paint supply tank is used to automatically supply paint to the spray gun, that is, a pressure-feed spray gun.

[0003] During the use of a pneumatic spray gun, air is used as a carrier, and through the cooperation of the nozzle, the spraying direction and range are restricted for spraying. However, in the process of using existing spraying equipment, due to the viscosity of the paint, after using for a period of time, the nozzle is prone to blockage. Moreover, the structure of the nozzle is complex and it is relatively inconvenient to clean. The nozzle needs to be replaced after using for a period of time, and there is also a situation where the paint is not evenly mixed, which is rather inconvenient. Therefore, we have set up an overall pneumatic route and spray gun logic. For this reason, we propose a pneumatic spray gun. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a pneumatic spray gun, which solves the problems put forward in the above background technique.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: A pneumatic spray gun includes a gun body. A trigger is movably sleeved outside the gun body. An air supply cavity is opened inside the gun body within the handle. A mixing and spraying cavity is opened at the front end within the inner cavity of the gun body. An air pressure cavity is opened above the rear end within the inner cavity of the gun body. A control cavity is opened inside the gun body behind the trigger. A shunt cavity is opened inside the gun body. An air supply channel is opened below the shunt cavity. A rear shunt channel is opened at the rear side above the shunt cavity. A front shunt channel is opened above the shunt cavity.

[0006] Optionally, an air supply sleeve is threadedly sleeved inside the gun body at the upper part. A spray rod is movably sleeved inside the inner cavity of the air supply sleeve. A support and sealing piece is movably sleeved inside the air pressure cavity. A sealing piece is threadedly sleeved at the rear end above the gun body. A limiting column is threadedly sleeved inside the inner cavity of the sealing piece. A second support spring is fixedly connected to the front surface of the sealing piece. The rear surface of the support and sealing piece is fixedly connected to the front end of the second support spring.

[0007] Optionally, a sealing ring that fits the outer side of the spray bar is sleeved inside the air supply sleeve. The top end of the front shunt channel extends to the outside of the air supply sleeve. Air grooves are provided on the outer walls of the air supply sleeve and the spray bar. Threads are provided on the outer sides of the front and rear ends of the air supply sleeve. The outer diameter value of the middle part of the air supply sleeve is smaller than that of the front and rear ends. The air groove of the air supply sleeve is located in the middle. The air groove of the spray bar is located inside the air supply sleeve. The outer diameter value at the position of the air groove of the spray bar is smaller than that of the front and rear ends.

[0008] Optionally, a first support spring is fixedly supported on the rear wall of the control cavity. The front end of the control cavity is threadedly sleeved with a fixed plugging sleeve. An active plugging column is movably sleeved inside the fixed plugging sleeve. The rear end of the active plugging column is connected to the front end of the first support spring. The front end of the active plugging column fits the back of the trigger.

[0009] Optionally, a first support sleeve is threadedly sleeved inside the bottom end of the gun body. A pressure regulating rod is supported above the first support sleeve by a pressure regulating rod. A first pressure regulating block is threadedly sleeved at the bottom end of the inner cavity of the first support sleeve. The bottom end of the pressure regulating rod is fixedly connected to the first pressure regulating block by threads.

[0010] Optionally, a second support sleeve is threadedly installed above the trigger on the left side of the gun body. A second pressure regulating block is threadedly and movably connected inside the second support sleeve.

[0011] Optionally, a fixed sleeve is threadedly sleeved on the outer side in front of the gun body. A nozzle is supported between the back of the fixed sleeve and the front of the gun body.

[0012] Optionally, a plastic pot is threadedly connected above the gun body. The plastic pot stores the spray coating material. The plastic pot is located above the mixing and spraying cavity.

[0013] The present utility model provides a pneumatic spraying gun, which has the following beneficial effects:

[0014] 1. In this pneumatic spraying gun, by providing a shunt cavity inside the gun body, the lower part of the shunt cavity is connected to the air supply cavity through an air supply channel. At the same time, the gas can be respectively transported to the inner cavities of the air pressure cavity and the mixing and spraying cavity through the rear shunt channel and the front shunt channel above the shunt cavity. With the cooperation of the fixed sleeve and the nozzle, the nozzle has a simple structure and is convenient to clean. At the same time, the inside of the mixing cavity can be quickly cleaned, which can effectively improve the convenience of use.

[0015] 2. The pneumatic spraying gun has a spray rod movably sleeved in the inner cavities of the air pressure chamber and the mixing spraying chamber. The spray rod is supported inside the gun body through an air supply sleeve. Threads are provided at positions near both ends on the outer side of the air supply sleeve, and an air exchange port penetrating through the inside and outside is arranged in the middle, which can cooperate with the front shunt channel to complete air distribution. The inner cavity of the air pressure chamber can complete the air movement of the spray rod through the cooperation of a support sealing piece and a second support spring. The pneumatic route inside the spray rod can complete the mixing and spraying of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model;

[0017] Figure 2 It is a schematic structural diagram of the disassembled present utility model;

[0018] Figure 3 It is a schematic structural diagram of the spray rod of the present utility model;

[0019] Figure 4 It is a schematic structural diagram of the movable plugging column of the present utility model;

[0020] Figure 5 It is a schematic structural diagram of the pressure regulating rod of the present utility model;

[0021] Figure 6 It is a schematic structural diagram of the gun body slice of the present utility model.

[0022] In the figure: 1. Gun body; 2. First support sleeve; 3. First pressure regulating block; 4. Pressure regulating rod; 5. Support spring; 6. Fixed sleeve; 7. Nozzle; 8. Trigger; 9. Fixed plugging sleeve; 10. Movable plugging column; 11. First support spring; 12. Air supply chamber; 13. Air pressure chamber; 14. Mixing spraying chamber; 15. Second support sleeve; 16. Second pressure regulating block; 17. Air supply sleeve; 18. Spray rod; 19. Support sealing piece; 20. Second support spring; 21. Sealing piece; 22. Limit column; 23. Front shunt channel; 24. Rear shunt channel; 25. Shunt chamber; 26. Air supply channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Please refer to Figures 1 to 6, the present utility model provides an embodiment: a pneumatic spraying gun, comprising a gun body 1. A fixing sleeve 6 is sleeved on the outer side of the front of the gun body 1 through threads. A nozzle 7 is supported between the rear of the fixing sleeve 6 and the front of the gun body 1. A trigger 8 is movably sleeved on the outside of the gun body 1. An air supply cavity 12 is formed inside the gun body 1 within the handle. The air supply cavity 12 consists of two chambers, and the interiors of the two chambers are interconnected. The rear chamber can supply air continuously, while the front chamber serves to support the plugging member, restrict the air intake speed, and control the pressure inside the air pressure cavity 13. A mixing and spraying cavity 14 is formed at the front end inside the gun body 1. A plastic pot is connected to the upper part of the gun body 1 through threads for storing the spraying material. The plastic pot is located above the mixing and spraying cavity 14. An air pressure cavity 13 is formed above the rear end inside the gun body 1. The cooperation between the air pressure cavity 13 and the mixing and spraying cavity 14 can support the spray rod 18 during use and enable the spray rod 18 to move back and forth during use. When the spray rod 18 sprays paint, air is supplied inside the spray rod 18 to mix with the paint. A control cavity is formed inside the gun body 1 behind the trigger 8. The control cavity can control the upward delivery of high-pressure air through the trigger 8, thereby controlling the spraying process. A shunt cavity 25 is formed inside the gun body 1. An air supply channel 26 is formed below the shunt cavity 25. A rear shunt channel 24 is formed at the rear side above the shunt cavity 25. A front shunt channel 23 is formed above the shunt cavity 25. The air supply channel 26 serves to supply air. The cooperation between the shunt cavity 25, the front shunt channel 23, and the rear shunt channel 24 can complete the air shunting. The rear shunt channel 24 can push the spray rod 18 through the air pressure cavity 13. The movement of the spray rod 18 can be controlled through the cooperation of compressed air and the support sealing piece 19.

[0025] Inside the upper part of the gun body 1, an air supply sleeve 17 is sleeved through threads. Inside the inner cavity of the air supply sleeve 17, a spray rod 18 is movably sleeved. The cooperation between the air supply sleeve 17 and the spray rod 18 can supply air stably. Through the threaded setting of the air supply sleeve 17, the position of the air supply sleeve 17 is fixed. The setting of the spray rod 18 enables the spray rod 18 to move inside the inner cavity of the air supply sleeve 17, and at the same time ensures the stability of air supply during the movement. Inside the air pressure cavity 13, a support sealing piece 19 is movably sleeved. At the rear end above the gun body 1, a sealing piece 21 is sleeved through threads. Inside the inner cavity of the sealing piece 21, a limiting column 22 is sleeved through threads. The cooperation between the sealing piece 21 and the limiting column 22 can limit the position of the support sealing piece 19 during use, and thus limit the movement range of the spray rod 18, which can play a role in controlling the paint spraying flow rate. In front of the sealing piece 21, a second support spring 20 is fixedly connected. The rear of the support sealing piece 19 and the front end of the second support spring 20 are fixedly connected. The setting of the second support spring 20 plays a role in supporting the support sealing piece 19. Through the second support spring 20, a forward thrust can be continuously applied to the support sealing piece 19, thereby ensuring that the spray rod 18 has a continuous forward thrust. When there is no air pressure transmission, the front end of the spray rod 18 will be in a blocked state.

[0026] Inside the air supply sleeve 17, a sealing ring that fits the outer side of the spray rod 18 is sleeved. The top end of the front shunt channel 23 extends to the outside of the air supply sleeve 17. Air grooves are provided on the outer walls of the air supply sleeve 17 and the spray rod 18. The provision of the air grooves can convey compressed gas to the inside of the spray rod 18 through the air supply channel 26, and then cooperate to complete spraying. The front shunt channel 23 and the rear shunt channel 24 cooperate to shunt high-pressure air, and the air is mixed and the paint is sprayed through the air channels inside the spray rod 18. The air pressure cavity 13 controls the opening and closing of the blockage of the spray rod 18, which can control the precision of spraying and is convenient for cleaning the spray gun. Threads are provided on the outer sides of the front and rear ends of the air supply sleeve 17. The outer diameter value in the middle of the air supply sleeve 17 is smaller than that of the front and rear ends. The air groove of the air supply sleeve 17 is located in the middle. The air groove of the spray rod 18 is located inside the air supply sleeve 17. The outer diameter value at the air groove of the spray rod 18 is smaller than that of the front and rear ends.

[0027] At the rear wall of the control cavity, a first support spring 11 is fixedly supported. At the front end of the control cavity, a fixed blocking sleeve 9 is sleeved through threads. Inside the fixed blocking sleeve 9, a movable blocking column 10 is movably sleeved. The setting of the first support spring 11 can stably support the movable blocking column 10, so that the movable blocking column 10 blocks the rear end of the fixed blocking sleeve 9, thereby closing the control cavity. When the trigger 8 pushes the movable blocking column 10 to move backward and a gap appears between the movable blocking column 10 and the fixed blocking sleeve 9, air can be conveyed upward through the movable blocking column 10 and the fixed blocking sleeve 9, which is convenient for using the device. The rear end of the movable blocking column 10 is connected to the front end of the first support spring 11. The front end of the movable blocking column 10 fits the rear of the trigger 8.

[0028] The inner side of the bottom end of the gun body 1 is sleeved with a first support sleeve 2 through threads. Above the first support sleeve 2, a pressure regulating rod 4 is supported by the pressure regulating rod 4. During the rotation of the first pressure regulating block 3 in the inner cavity of the first support sleeve 2, it can control the opening and closing of the top end of the air supply cavity 12. The cooperation of the support spring 5 and the upper and lower gaskets can first ensure the tension during the movement of the first pressure regulating sleeve 2 and the first pressure regulating block. At the same time, the lower gasket is made of rubber material, which can effectively ensure the sealing performance of the bottom of the air supply cavity. The bottom end of the pressure regulating rod 4 is fixedly connected to the first pressure regulating block 3 through threads.

[0029] On the left side of the gun body 1, above the trigger 8, a second support sleeve 15 is installed through threads. The inner side of the second support sleeve 15 is movably connected to a second pressure regulating block 16 through threads. By rotating the second support sleeve 15 in the inner cavity of the second pressure regulating block 16, the opening amount of the front shunt channel 23 can be controlled, thereby controlling the air supply volume of the spray rod 18, controlling the air pressure during the spraying process, the mixing degree of the coating, and the spraying requirements to control the spraying air pressure.

[0030] In summary, for this pneumatic spraying gun, during use, connect the air supply pipeline to the rear of the bottom of the air supply chamber 12, and connect the paint pipeline above or below the mixing spraying chamber 14. First, introduce air into the inner cavity of the air supply chamber 12 from the rear bottom of the air supply chamber 12. Subsequently, high-pressure air will fill the inner cavity of the air supply chamber 12. By rotating the first pressure regulating block 3, the first pressure regulating block 3 rotates inside the first pressure regulating sleeve 2, thereby adjusting the positions of the first pressure regulating block 3 and the plugging rod 4, creating a gap above the air supply chamber 12. Compressed gas will enter the inner cavity of the transfer chamber behind the trigger 8. Subsequently, by pulling the trigger 8, the trigger 8 presses the movable plugging column 10. The first support spring 11 will be in a compressed state, and at the same time, the rear end of the movable plugging column 10 will separate from the fixed plugging sleeve 9. The air pressure in the inner cavity of the air supply chamber 12 will enter the inner cavity of the transfer chamber behind the trigger 8. The compressed air will be sent to the outside of the fixed plugging sleeve 9 through the movable plugging column 10, and then sent to the inner cavity of the shunt chamber 25 through the air supply channel 26. The compressed air will be shunted through the front shunt channel 23 and the rear shunt channel 24. The shunted compressed air will enter the positions near the front end of the inner cavity of the air pressure chamber 13 through the rear shunt channel 24 respectively. The front shunt channel 23 will be delivered to the outside of the air supply sleeve 17, enter the outside of the spray rod 18 through the air inlet in the middle of the air supply sleeve 17, and then enter the inside of the spray rod 18. It will be transported forward through the spray rod 18 to the position of the mixing spraying chamber 14. The compressed gas in the inner cavity of the air pressure chamber 13 will push the support sealing piece 19 to move backward, making the second support spring 20 in a compressed state. At the same time, the air pressure in the inner cavity of the spray rod 18 and the air pressure in the front side of the air pressure chamber 13 will cooperate to push the spray rod 18 to move backward, so that the air pressure in the inner cavity of the spray rod 18 will first enter the inner cavity of the mixing spraying chamber 14 to mix and disperse the paint, and then be sprayed out through the nozzle 7. During the use process, the cooperation between the first support sleeve 2 and the first pressure regulating block 3 can adjust the intake air pressure. The setting of the second support sleeve 15 can limit the intake air volume of the front shunt channel 23. The setting of the limit post 22 can limit the movement range of the support sealing piece 19. The air pressure in the spray rod 18, after a gap is generated between the spray rod 18 and the nozzle 7, the size of the gap is the size of the paint output. After using for a period of time, if the nozzle 7 is blocked, by unscrewing the fixing sleeve 6 and then separating the nozzle 7, the inner cavity of the mixing spraying chamber 14 and the nozzle 7 can be thoroughly cleaned, which is convenient for cleaning the nozzle part.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic spray gun, comprising a gun body (1), and a trigger (8) is movably sleeved outside the gun body (1), characterized in that: Inside the gun body (1) and within the handle, an air supply chamber (12) is provided. In the inner cavity of the gun body (1) at the front end, a mixing and spraying chamber (14) is provided. Above the inner cavity of the gun body (1) near the rear end, a pressure chamber (13) is provided. Inside the gun body (1), a control chamber is provided behind the trigger (8). Inside the gun body (1), a flow splitting chamber (25) is provided. Below the flow splitting chamber (25), an air supply channel (26) is provided. At the rear side above the flow splitting chamber (25), a rear flow splitting channel (24) is provided. Above the flow splitting chamber (25), a front flow splitting channel (23) is provided.

2. The pneumatic spraying gun according to claim 1, wherein: Inside the gun body (1) at the upper part, an air supply sleeve (17) is threadedly sleeved. Inside the inner cavity of the air supply sleeve (17), a spray rod (18) is movably sleeved. Inside the pressure chamber (13), a support and sealing piece (19) is movably sleeved. At the rear end above the gun body (1), a sealing piece (21) is threadedly sleeved. Inside the inner cavity of the sealing piece (21), a limiting column (22) is threadedly sleeved. In front of the sealing piece (21), a second support spring (20) is fixedly connected. The rear side of the support and sealing piece (19) and the front end of the second support spring (20) are fixedly connected.

3. The pneumatic spraying gun according to claim 2, characterized in that: Inside the air supply sleeve (17), a sealing ring that fits the outer side of the spray rod (18) is sleeved. The top end of the front flow splitting channel (23) extends to the outside of the air supply sleeve (17). On the outer walls of the air supply sleeve (17) and the spray rod (18), air grooves are provided. On the outer sides of the front and rear ends of the air supply sleeve (17), threads are provided. The outer diameter value in the middle of the air supply sleeve (17) is smaller than that of the front and rear ends. The air groove of the air supply sleeve (17) is located in the middle. The air groove of the spray rod (18) is located inside the air supply sleeve (17). The outer diameter value at the air groove of the spray rod (18) is smaller than that of the front and rear ends.

4. The pneumatic spraying gun according to claim 1, characterized in that: At the rear wall of the control chamber, a first support spring (11) is fixedly supported. At the front end of the control chamber, a fixed plugging sleeve (9) is threadedly sleeved. Inside the fixed plugging sleeve (9), a movable plugging column (10) is movably sleeved. The rear end of the movable plugging column (10) is connected to the front end of the first support spring (11). The front end of the movable plugging column (10) abuts against the rear side of the trigger (8).

5. The pneumatic spray gun according to claim 1, characterized in that: At the inner side of the bottom end of the gun body (1), a first support sleeve (2) is threadedly sleeved. On the upper surface of the first support sleeve (2), a pressure regulating rod (4) is supported by a pressure regulating rod (4). At the bottom end of the inner cavity of the first support sleeve (2), a first pressure regulating block (3) is threadedly sleeved. The bottom end of the pressure regulating rod (4) is fixedly connected to the first pressure regulating block (3) by threads.

6. The pneumatic spraying gun according to claim 1, characterized in that: On the left side of the gun body (1) above the trigger (8), a second support sleeve (15) is threadedly installed. Inside the second support sleeve (15), a second pressure regulating block (16) is threadedly and movably connected.

7. The pneumatic spraying gun according to claim 1, wherein: On the outer side in front of the gun body (1), a fixed sleeve (6) is threadedly sleeved. Behind the fixed sleeve (6) and in front of the gun body (1), a nozzle (7) is supported.

8. A pneumatic spray gun according to claim 1, characterized in that: A plastic pot is threadedly connected above the gun body (1). The plastic pot stores the spray coating material and is located above the mixing and spraying chamber (14).

Images