Spray gun structure for thermal spraying

Abstract

The utility model relates to the technical field of spray guns, in particular to a spray gun structure for thermal spraying. According to the technical scheme, the spraying gun comprises a gun shell, a sealing strip, a handle, a material storage pot and a built-in cylinder, a spraying head is arranged at the front end of the gun shell, a material taking pipe is installed on the lower side of the front end of the gun shell in a penetrating mode, an opening in the upper end of the material storage pot is installed at a connector of the top of the material taking pipe in a threaded mode, a rotary knob is rotationally installed on one side of the gun shell, and a partition plate is arranged on the lower side of the interior of the gun shell; a regulating valve is arranged at the front end of the partition plate, a liquid discharging pipe is installed at the rear end of the gun shell in a penetrating mode, a circulation groove is formed in the upper end face of the gun shell, a threaded sleeve is arranged at the tail end of the circulation groove, the sealing strip is inserted into the circulation groove, a stud is rotatably installed at the tail end of the sealing strip, the stud is installed on the threaded sleeve in a threaded mode, and a trigger is arranged on the lower side of the gun shell. The upper end of the handle is fixed to the lower side of the rear end of the gun shell. The utility model has the advantages that the cleaning is convenient, the use quality is ensured, the built-in heating mechanism is arranged, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a spray gun structure for thermal spraying. Background Technique

[0002] A spray gun for thermal spraying is a tool that uses heat sources such as flames, electric arcs or plasmas to heat the spraying material and sprays it onto the surface of the substrate through a high-speed air flow to form a coating.

[0003] The existing spray gun structure for thermal spraying is simple. After use, there is still coating remaining inside, which cannot be cleared. When it cools down, the coating is likely to clog, affecting normal use. Moreover, the existing spray gun for thermal spraying generally heats the coating after spraying through an external heating mechanism. This operation method affects work efficiency and has poor safety. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spray gun structure for thermal spraying, which has the advantages of being easy to clean, ensuring the use quality and having an internal heating mechanism with high safety, and solves the problems in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A spray gun structure for thermal spraying, including a gun shell, a seal, a handle, a material storage pot and an internal cylinder. The front end of the gun shell is provided with a nozzle. The lower side of the front end of the gun shell is penetrated and installed with a material taking pipe. The upper opening of the material storage pot is threadedly installed at the joint at the top of the material taking pipe. One side of the gun shell is rotatably installed with a knob. The lower side inside the gun shell is provided with a partition plate. The front end of the partition plate is provided with a regulating valve. The rear end of the gun shell is penetrated and installed with a drain pipe. The upper end surface of the gun shell is provided with a flow groove, and the tail end of the flow groove is provided with a screw sleeve. The seal is inserted into the flow groove. The tail end of the seal is rotatably installed with a screw stud, and the screw stud is threadedly installed on the screw sleeve. The lower side of the gun shell is provided with a trigger. The upper end of the handle is fixed to the lower side of the rear end of the gun shell. The lower end of the handle is provided with an air inlet pipe and a connection port. The internal cylinder is embedded and installed inside the upper end of the handle. A flow groove is opened between the gun shell and the handle.

[0006] When using a spray gun structure for thermal spraying in this technical solution, an external power cord is connected to the electrical interface at the rear of the handle to supply power to the heating wire. The upper opening of the material storage pot is threadedly connected to the upper interface of the material extraction pipe. At this time, the lower end of the material extraction pipe is placed at the bottom inside the material storage pot. The outer end of the conduit is connected to the connection port, and the intake pipe is connected to an external air pump. External air flows into the handle cavity through the intake pipe and then is introduced into the top inside the material storage pot through the conduit. At this time, the internal pressure of the material storage pot is filled, squeezing the lower liquid paint, causing it to be injected into the cavity on the lower side of the gun housing through the material extraction pipe. The paint is heated by the heating wire in the cavity. When spraying operations are carried out, the operator holds the handle and rotates the knob to drive the valve inside the regulating valve to open. The opening and closing size of the valve port is adjusted through the rotation amplitude to achieve the adjustment of the material discharge volume. After heating, the paint overflows outward through the opening of the regulating valve. Pressing the trigger squeezes the valve stem to drive the piston column to retract. At this time, the flow port channel is opened, and the air flow inside the handle is introduced into the upper cavity inside the gun housing through the flow port and the flow groove. The air flow drives the paint overflowing from the opening of the regulating valve to spray out from the nozzle part. When cleaning after use, the stud is disassembled by threading, and then the seal is separated and pulled out from the cleaning groove. The outer end cap of the drain pipe is opened, the regulating valve opening is set to the maximum, and then the cleaning liquid is injected into the gun housing through the cleaning groove. The cleaning liquid fills the upper and lower cavities inside the gun housing and then is discharged outward through the drain pipe and the material extraction pipe to ensure the internal cleanliness and avoid blockage.

[0007] Preferably, a conduit is installed through one side of the material storage pot, and the outer end of the conduit is connected to the connection port. The inner end of the conduit is connected to the top inside the material storage pot. The air flow inside the handle is introduced into the top inside the material storage pot through the conduit and the connection port.

[0008] Preferably, the lower end of the material extraction pipe passes through the opening of the material storage pot and is placed at the bottom inside it. The material storage pot is made of polyethylene material. The pressure inside the material storage pot is enhanced by air filling, causing the liquid paint inside the material storage pot to be drawn out through the material extraction pipe.

[0009] Preferably, the partition divides the inside of the gun housing into an upper cavity and a lower cavity, and a heating wire is provided in the lower cavity. The upper end of the material extraction pipe communicates with the lower cavity, and the nozzle communicates with the upper cavity. The paint drawn out through the material extraction pipe fills the lower cavity and is then heated by the heating wire.

[0010] Preferably, the upper cavity of the gun housing is connected to the flow groove and the drain pipe. The regulating valve communicates the upper cavity with the lower cavity, and the regulating valve corresponds to the connection between the nozzle and the upper cavity. By opening the regulating valve, the heated paint is introduced into the connection of the upper cavity to the nozzle, and then is flushed out by the air flow to achieve spraying.

[0011] Preferably, a valve stem is slidably installed at the front opening of the built-in cylinder, and the outer end of the valve stem corresponds to the trigger. By pressing the trigger, the lower side of the trigger deflects and squeezes the valve stem to make it contract.

[0012] Preferably, a piston column is slidably mounted in the middle of the inner part of the built-in cylinder, and the rear end of the valve stem is fixed to the front end of the piston column. A spring is provided at the tail end of the inner part of the built-in cylinder, and the front end of the spring is connected to the rear end of the piston column. The piston column is squeezed by the valve stem to move backward, and the spring is squeezed by the piston column to deform, and the piston column is reset by the spring.

[0013] Preferably, the upper and lower end surfaces of the built-in cylinder are both provided with flow ports, and the flow ports correspond to the piston column, and the flow ports are connected to the flow slots. When the piston column is displaced, the channel of the flow ports is opened, and the airflow inside the handle enters the upper cavity of the gun housing through the flow ports and the flow slots.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the external power cord is connected to the electrical interface on the rear side of the handle to supply power to the heating wire, the upper end opening of the material storage pot is threadedly connected to the upper end interface of the material taking tube, at this time the lower end of the material taking tube is placed in the bottom end of the material storage pot, the outer end of the conduit is connected to the pipe port, the air intake pipe is connected to the external air pump, the external air flow enters the handle cavity through the air intake pipe, and then the air flow is introduced into the top of the material storage pot through the conduit. At this time, the air pressure inside the material storage pot is filled, squeezing the lower liquid paint so that it is injected into the cavity on the lower side of the gun housing through the material taking tube, and the paint is heated by the heating wire in the cavity. When spraying, the operator holds the handle and turns the knob to drive the valve inside the regulating valve to open, and adjusts the opening and closing size of the valve port by the rotation amplitude to achieve material discharge adjustment. After heating, the paint passes through The regulating valve opening overflows outward, and the trigger is pressed to squeeze the valve stem to drive the piston column to retract. At this time, the flow port channel is opened, and the airflow inside the handle is introduced into the upper cavity inside the gun housing through the flow port and the flow groove. The airflow drives the paint overflowing from the regulating valve opening to be sprayed out from the nozzle. When cleaning after use, the stud is removed by thread, and then the seal is separated and pulled out from the cleaning tank, the outer end pipe cover of the drain pipe is opened, the regulating valve opening is started to the maximum, and then the cleaning liquid is injected into the gun housing through the cleaning tank. The cleaning liquid fills the upper and lower cavities inside the gun housing and is then discharged outward through the drain pipe and the material taking pipe to ensure internal cleanliness and avoid blockage. The device is easy to operate and can ensure the discharge of residual paint inside the device to avoid blockage through the convenient cleaning design. At the same time, the built-in heating mechanism ensures the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the gun housing of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the built-in cylinder of the utility model.

[0019] In the figure: 1. nozzle; 2. gun shell; 3. seal; 4. trigger; 5. stud; 6. handle; 7. conduit; 8. knob; 9. material storage pot; 10. intake pipe; 11. regulating valve; 12. heating wire; 13. partition; 14. cleaning tank; 15. screw sleeve; 16. drain pipe; 17. flow groove; 18. inner cylinder; 19. connection port; 20. valve stem; 21. flow port; 22. spring; 23. piston rod; 24. material extraction pipe. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1

[0022] Please refer to Figures 1 to 4 , the present invention provides an embodiment: a spray gun structure for thermal spraying, including a gun shell 2, a seal 3, a handle 6, a material storage pot 9 and an inner cylinder 18. A nozzle 1 is provided at the front end of the gun shell 2. A material extraction pipe 24 is installed through the lower side of the front end of the gun shell 2. The upper end opening of the material storage pot 9 is threadedly installed at the joint at the top of the material extraction pipe 24. A knob 8 is rotatably installed on one side of the gun shell 2. A partition 13 is provided at the lower side inside the gun shell 2. A regulating valve 11 is provided at the front end of the partition 13. A drain pipe 16 is installed through the rear end of the gun shell 2.

[0023] Furthermore,

[0024] A conduit 7 is installed through one side of the material storage pot 9, and the outer end of the conduit 7 is connected to the connection port 19. The inner end of the conduit 7 is connected to the inner top end of the material storage pot 9. The air flow inside the handle 6 is introduced into the inner top end of the material storage pot 9 through the conduit 7 and the connection port 19.

[0025] Furthermore,

[0026] The lower end of the material extraction pipe 24 passes through the opening of the material storage pot 9 and is placed at its inner bottom end. The material storage pot 9 is made of polyethylene. The pressure inside the material storage pot 9 is enhanced by filling it with air flow, so that the liquid coating inside the material storage pot 9 is extracted through the material extraction pipe 24.

[0027] Furthermore,

[0028] The partition plate 13 divides the interior of the gun housing 2 into an upper cavity and a lower cavity. A heating wire 12 is provided in the lower cavity. The upper end of the material taking pipe 24 communicates with the lower cavity, and the spray head 1 communicates with the upper cavity. The paint extracted through the material taking pipe 24 is filled into the lower cavity and then heated by the heating wire 12.

[0029] Furthermore,

[0030] The upper cavity of the gun housing 2 is communicated with the flow groove 17 and the drain pipe 16. The regulating valve 11 communicates the upper cavity and the lower cavity, and the regulating valve 11 corresponds to the connection between the spray head 1 and the upper cavity. By opening the regulating valve 11, the heated paint is introduced into the connection of the spray head 1 in the upper cavity, and then it is ejected by the air flow to achieve spraying.

[0031] Embodiment 2

[0032] Please refer to Figures 1 to 4 , the present utility model provides an embodiment: a spray gun structure for thermal spraying, including a gun housing 2, a seal 3, a handle 6, a material storage pot 9 and an inner cylinder 18. A flow groove 17 is opened on the upper end surface of the gun housing 2, and a screw sleeve 15 is provided at the end of the flow groove 17. The seal 3 is inserted into the flow groove 17. A screw column 5 is rotatably installed at the end of the seal 3, and the screw column 5 is threadedly installed on the screw sleeve 15. A trigger 4 is provided on the lower side of the gun housing 2. The upper end of the handle 6 is fixed to the lower rear side of the gun housing 2. An air inlet pipe 10 and a connection port 19 are provided at the lower end of the handle 6. The inner cylinder 18 is embedded and installed inside the upper end of the handle 6. A flow groove 17 is opened between the gun housing 2 and the handle 6.

[0033] Furthermore,

[0034] A valve rod 20 is slidably installed at the front end opening of the inner cylinder 18, and the outer end of the valve rod 20 corresponds to the trigger 4. By pressing the trigger 4, the lower side of the trigger 4 deflects and presses the valve rod 20 to make it contract.

[0035] Furthermore,

[0036] A piston column 23 is slidably installed in the middle of the inner cylinder 18, and the rear end of the valve rod 20 is fixed to the front end of the piston column 23. A spring 22 is provided at the rear end of the inner cylinder 18, and the front end of the spring 22 is connected to the rear end of the piston column 23. By the valve rod 20 pressing the piston column 23 to move it backward, the piston column 23 presses to deform the spring 22, and the spring 22 drives the piston column 23 to reset.

[0037] Furthermore,

[0038] Both the upper and lower end faces of the built-in cylinder 18 are provided with flow ports 21, and the flow ports 21 correspond to the piston rod 23. The flow ports 21 are connected to the flow grooves 17. When the piston rod 23 is displaced, the channels of the flow ports 21 are opened, and the air flow inside the handle 6 enters the upper cavity of the gun housing 2 through the flow ports 21 and the flow grooves 17.

[0039] During the operation of the present utility model, an external power cord is connected to the electrical interface at the rear side of the handle 6 to supply power to the heating wire 12. The upper end opening of the material storage pot 9 is threadedly connected to the upper end interface of the material taking pipe 24. At this time, the lower end of the material taking pipe 24 is placed at the bottom inside the material storage pot 9. The outer end of the conduit 7 is connected to the connection port 19, and the air inlet pipe 10 is connected to an external air pump. The external air flow enters the cavity of the handle 6 through the air inlet pipe 10, and then the air flow is introduced into the top inside the material storage pot 9 through the conduit 7. At this time, the internal air pressure of the material storage pot 9 is filled, squeezing the lower liquid paint, so that it is injected into the cavity below the gun housing 2 through the material taking pipe 24. The paint is heated by the heating wire 12 inside the cavity. When spraying operations are carried out, the operator holds the handle 6 and rotates the knob 8 to drive the valve inside the regulating valve 11 to open. By rotating the amplitude, the opening and closing size of the valve port is adjusted to achieve the adjustment of the material discharge amount. The heated paint overflows outward through the opening of the regulating valve 11. Pressing the trigger 4 squeezes the valve rod 20 to drive the piston rod 23 to retract. At this time, the channels of the flow ports 21 are opened, and the air flow inside the handle 6 is introduced into the upper side cavity inside the gun housing 2 through the flow ports 21 and the flow grooves 17. The air flow drives the paint overflowing from the opening of the regulating valve 11 to spray outwards from the nozzle 1 part. When cleaning after use, the stud 5 is disassembled by threading, and then the seal 3 is separated and pulled out from the cleaning groove 14. The outer end cap of the drain pipe 16 is opened, the regulating valve 11 is opened to the maximum, and then the cleaning liquid is injected into the gun housing 2 through the cleaning groove 14. The cleaning liquid fills the upper and lower side cavities inside the gun housing 2, and then is discharged outwards through the drain pipe 16 and the material taking pipe 24 to ensure the internal cleanliness and avoid blockage.

[0040] 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 principle 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 spray gun structure for thermal spraying, comprising a gun housing (2), a seal (3), a handle (6), a material storage pot (9) and an internal cylinder (18), characterized in that: The front end of the gun housing (2) is provided with a nozzle (1), the lower side of the front end of the gun housing (2) is penetrated by a material taking pipe (24), the upper end opening of the material storage pot (9) is threadedly installed at the joint at the top of the material taking pipe (24), one side of the gun housing (2) is rotatably installed with a knob (8), the lower side of the interior of the gun housing (2) is provided with a partition (13), the front end of the partition (13) is provided with a regulating valve (11), the rear end of the gun housing (2) is penetrated by a drain pipe (16), the upper end surface of the gun housing (2) is provided with a flow groove (17), and the flow groove (17) is provided with a flow groove (17). ) is provided with a screw sleeve (15) at the tail end, the seal (3) is inserted in the circulation groove (17), a stud (5) is rotatably installed at the tail end of the seal (3), and the stud (5) is threadedly installed on the screw sleeve (15), a trigger (4) is provided on the lower side of the gun housing (2), the upper end of the handle (6) is fixed to the lower side of the rear end of the gun housing (2), the lower end of the handle (6) is provided with an air intake pipe (10) and a pipe port (19), the built-in cylinder (18) is embedded and installed on the inner side of the upper end of the handle (6), and a circulation groove (17) is provided between the gun housing (2) and the handle (6).

2. A thermal spraying gun structure according to claim 1, characterized in that: A conduit (7) is installed through one side of the material storage pot (9), and the outer end of the conduit (7) is connected to the pipe port (19), and the inner end of the conduit (7) is connected to the inner top end of the material storage pot (9).

3. A thermal spraying gun structure according to claim 1, characterized in that: The lower end of the material taking pipe (24) passes through the opening of the material storage pot (9) and is placed at the inner bottom thereof. The material storage pot (9) is made of polyethylene material.

4. A thermal spraying gun structure according to claim 1, characterized in that: The partition (13) divides the interior of the gun housing (2) into an upper cavity and a lower cavity, and a heating wire (12) is provided in the lower cavity. The upper end of the material taking pipe (24) is connected to the lower cavity, and the nozzle (1) is connected to the upper cavity.

5. A thermal spraying gun structure according to claim 4, characterized in that: The upper cavity of the gun housing (2) is connected to the circulation groove (17) and the liquid discharge pipe (16), the regulating valve (11) is connected to the upper cavity and the lower cavity, and the regulating valve (11) corresponds to the connection between the nozzle (1) and the upper cavity.

6. A thermal spraying gun structure according to claim 1, characterized in that: A valve stem (20) is slidably mounted at the front end opening of the built-in cylinder (18), and the outer end of the valve stem (20) corresponds to the trigger (4).

7. A thermal spraying gun structure according to claim 6, characterized in that: A piston column (23) is slidably mounted in the middle of the inner portion of the built-in cylinder (18), and the rear end of the valve stem (20) is fixed to the front end of the piston column (23). A spring (22) is provided at the rear end of the inner portion of the built-in cylinder (18), and the front end of the spring (22) is connected to the rear end of the piston column (23).

8. A thermal spraying gun structure according to claim 7, characterized in that: The upper and lower end surfaces of the built-in cylinder (18) are both provided with flow openings (21), and the flow openings (21) correspond to the piston column (23), and the flow openings (21) are connected to the flow groove (17).

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