Spray gun fixing device of plasma spraying equipment

Abstract

The utility model discloses a spray gun fixing device of plasma spraying equipment, and belongs to the technical field of spraying equipment, and the spray gun fixing device is characterized by comprising a spray gun disc mounted on the outer wall of a spraying chamber and used for fixing a spray gun; the insulating part is fixedly arranged on the spray gun disc through a hold-down ring; the powder feeding needle is arranged on the spray gun disc and used for conveying metal powder, and an outlet faces the axis of the spray gun disc; the air blowing pipe is arranged on the spray gun disc, an outlet faces the axis of the spray gun disc, and the air blowing pipe is used for accelerating molten or semi-molten powder and spraying the powder to the surface of a base material; the first O-shaped ring is located between the spray gun disc and the spraying chamber, a cavity is formed between an outer shell and an inner shell of the spray gun disc, and cooling liquid circularly flows in the cavity. According to the invention, the multiple layers of O-shaped rings are arranged between the spraying chamber and the spray gun disc, so that tight connection between the spray gun disc and the spraying chamber is ensured; and gas or powder leakage possibly generated in the spraying process is effectively prevented, and the spraying efficiency and quality are improved.

Description

Technical Field

[0001] This application belongs to the technical field of spraying equipment, and more specifically, it relates to a gun fixing device for a plasma spraying equipment. Background Art

[0002] Plasma spraying technology is a high-tech process widely used in surface modification and coating preparation. Its core lies in using high-temperature plasma gas to melt powder materials and spray them onto the workpiece surface at high speed to form a uniform and dense coating. In this process, the gun fixing device plays a crucial role.

[0003] Currently, the Chinese patent with the publication number CN220352212U discloses a screw plasma spraying equipment, including a power chassis. A smooth track is provided at the bottom of the power chassis. A chuck is rotatably installed on the power chassis. A support frame is horizontally slidably installed at one end of the smooth track away from the power chassis. A spraying chamber is horizontally slidably installed on the smooth track. A crossbeam is fixedly installed in the upper middle part of the spraying chamber. A gun is installed on the crossbeam. The workpiece is clamped on the chuck clamping device and can rotate through the chuck. The tail of the workpiece is supported by adjusting the position of the support frame. The spraying chamber moves on the smooth track, and the gun sprays the workpiece. The spraying chamber can block the splashing of the spraying particles. When spraying to the tail of the workpiece, the spraying chamber pushes the support frame away, and the tail of the workpiece enters the spraying chamber to continue spraying.

[0004] In the prior art, similar plasma spraying equipment still has the following defects in the actual application process:

[0005] 1. The gun is not firmly fixed to the gun disc, making it difficult to ensure the stability of the gun in a high-temperature working environment, which easily leads to uneven spraying or the gun falling off;

[0006] 2. The sealing effect is not good: The seal design is unreasonable, resulting in the leakage of working gas, affecting the spraying quality and the safety of the equipment. Content of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a gun fixing device for a plasma spraying equipment, and its advantage lies in that it can improve the sealing effect and extend the service life of the gun.

[0008] To achieve the above purpose, the present utility model provides the following technical solution: A gun fixing device for a plasma spraying equipment, including:

[0009] A gun disc, installed on the outer wall of the spraying chamber, for fixing the gun;

[0010] An insulating part, arranged between the spraying chamber and the gun disc, and fixedly arranged on the gun disc through a compression ring;

[0011] The powder feeding needle is arranged on the spray gun disc and its outlet faces the axis of the spray gun disc, and is used for conveying metal powder;

[0012] The air blowing pipe is arranged on the spray gun disc and its outlet faces the axis of the spray gun disc, and is used for accelerating and spraying the molten or semi-molten powder onto the surface of the substrate;

[0013] The first O-ring is located between the spray gun disc and the spraying chamber, and is used for sealing the spraying chamber and the spray gun disc;

[0014] Wherein, there is a cavity between the outer shell and the inner shell of the spray gun disc, and a coolant circulates in this cavity to cool the spray gun disc and the spray gun.

[0015] By adopting the above technical solution, the coolant circulates between the inner shell and the outer shell, and can adsorb the heat generated during the operation of the spray gun, thereby improving the service life of the spray gun and the spraying effect;

[0016] Secondly, by setting the first O-ring, the sealing performance and firmness between the spraying chamber and the spray gun disc can be improved.

[0017] In a preferred embodiment: a high-pressure gas channel communicating with the gas outlet channel of the spray gun is opened on the spray gun disc, and is used for providing high-pressure gas.

[0018] By adopting the above technical solution, the high-pressure gas channel is used to provide high-pressure gas to the spray gun. These gases are ionized inside the spray gun to form a plasma arc. The high temperature of the plasma arc melts the spraying material and accelerates it to be sprayed onto the surface of the workpiece, thereby forming a coating.

[0019] In a preferred embodiment: a second O-ring is arranged between the insulating part and the spray gun disc.

[0020] By adopting the above technical solution, it not only enhances the sealing performance of the connection between the spray gun and the spray gun disc, but also provides necessary electrical insulation, ensuring the safety of operation.

[0021] In a preferred embodiment: two insulating parts are provided in total, and the two insulating parts are located on both sides of the spray gun flange of the spray gun.

[0022] By adopting the above technical solution, the two insulating parts clamp the spray gun flange, and the electrical insulation effect can be improved.

[0023] In a preferred embodiment: threaded holes are opened on the spray gun disc, and the pressing ring is fixed on the spray gun disc through bolts.

[0024] By adopting the above technical solution, the spray gun and the insulating part can be firmly fixed on the spray gun disc, and the disassembly is convenient.

[0025] In a preferred embodiment: A powder feeding needle fixing seat is fixed on the spray gun disk, and the powder feeding needle is fixed on the powder feeding needle fixing seat by bolts.

[0026] By adopting the above technical solution, the position of the powder feeding needle can be changed by adjusting the position of the bolt to meet the requirements of different spraying tasks.

[0027] In a preferred embodiment: An air blowing pipe fixing seat is fixed on the spray gun disk, and the air blowing pipe fixing seat is fixed on the air blowing pipe fixing seat by bolts.

[0028] By adopting the above technical solution, the position of the air blowing pipe can be changed by adjusting the position of the bolt to meet the requirements of different spraying tasks.

[0029] In a preferred embodiment: The number of the powder feeding needles and the air blowing pipes are both set to be multiple. The multiple powder feeding needles and air blowing pipes are all arranged around the circumference of the spray gun disk, and the powder feeding needles and the air blowing pipes are distributed at intervals.

[0030] By adopting the above technical solution, the outlets of the powder feeding needles and the air blowing pipes all face the axis of the spray gun disk, so that the spraying of the target material is more concentrated and accurate. Moreover, multiple powder feeding needles can simultaneously convey powder to the spray gun, increasing the powder supply amount, thereby improving the spraying speed. Multiple air blowing pipes blow air simultaneously, which can more effectively accelerate and eject the molten or semi-molten powder onto the surface of the substrate to form a more uniform coating. The surrounding and spaced powder feeding needles and air blowing pipes can ensure the uniform distribution of the powder around the spray gun, avoiding the situation of too high or too low local powder concentration, thereby improving the uniformity and density of the coating.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] 1. By arranging multiple layers of O-ring seals between the spraying chamber and the spray gun disk, the tight connection between the spray gun disk and the spraying chamber is ensured, effectively preventing the leakage of gas or powder that may occur during the spraying process, and improving the spraying efficiency and quality;

[0033] 2. When installing the spray gun, first set the second O-ring seal between the insulating pad and the spray gun disk, then align the spray gun with the central hole of the spray gun disk, and fix the positions of the insulating pad and the spray gun through the compression ring. On the one hand, it can enhance the sealing performance of the connection between the spray gun and the spray gun disk, and on the other hand, it also provides necessary electrical insulation to ensure the safety of the operation;

[0034] 3. By circulating the coolant between the inner shell and the outer shell, the heat generated during the operation of the spray gun can be adsorbed, thereby increasing the service life of the spray gun and improving the spraying effect. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of this embodiment;

[0036] Figure 2 It is a schematic cross-sectional structural diagram of this embodiment;

[0037] Figure 3 It is an exploded structural diagram of the spray gun disk of this embodiment.

[0038] Description of the reference numerals:

[0039] 1. Spray gun disk; 11. Outer shell; 12. Inner shell; 13. Cavity; 14. High-pressure gas channel; 2. Insulating part; 3. Powder feeding needle; 31. Powder feeding needle fixing seat; 4. Blowing pipe; 41. Blowing pipe fixing seat; 5. First O-ring; 6. Second O-ring; 7. Compression ring;

[0040] 100. Spraying chamber;

[0041] 200. Spray gun. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure.

[0043] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the disclosed product is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present disclosure 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, and therefore should not be construed as a limitation to the present disclosure.

[0044] A spray gun fixing device for a plasma spraying device, as Figures 1 - 3 shown, includes:

[0045] A spray gun disk 1, installed on the outer wall of the spraying chamber 100 for fixing the spray gun 200;

[0046] An insulating part 2, installed between the spraying chamber 100 and the spray gun disk 1 and fixedly arranged on the spray gun disk 1 through a compression ring 7;

[0047] A powder feeding needle 3, installed on the spray gun disk 1 and with its outlet facing the axis of the spray gun disk 1 for transporting metal powder;

[0048] A blowing pipe 4, installed on the spray gun disk 1 and with its outlet facing the axis of the spray gun disk 1 for accelerating and spraying the molten or semi-molten powder onto the surface of the substrate;

[0049] The first O-ring 5 is located between the spray gun disc 1 and the spraying chamber 100, and is used to seal the spraying chamber 100 and the spray gun disc 1.

[0050] Based on the above embodiments, as Figure 2 shown, the spray gun 200 is fixed on the spray gun disc 1. Among them, two insulating parts 2 are provided. The two insulating parts 2 are located on both sides of the spray gun flange of the spray gun 200. The two insulating parts 2 clamp the spray gun flange, which can enhance the sealing performance of the connection between the spray gun 200 and the spray gun disc 1, and also provide necessary electrical insulation to ensure the safety of operation. Moreover, a second O-ring 6 is also provided between the insulating part 2 and the spray gun disc 1 to improve the electrical insulation effect.

[0051] It is worth mentioning that: threaded holes are provided on the spray gun disc 1, and the pressing ring 7 is fixed on the spray gun disc 1 through bolts, so as to firmly fix the spray gun 200 and the insulating part 2 on the spray gun disc 1.

[0052] Based on the above solution, in combination with the attached Figure 2 figure, it can be seen that the spray gun disc 1 includes an outer shell 11 and an inner shell 12. There is a cavity 13 between the outer shell 11 and the inner shell 12. A coolant circulates in the cavity 13. Moreover, a coolant inlet pipe and a coolant outlet pipe for the coolant to flow through are communicated on the spray gun disc 1. By the flow of the coolant between the inner shell 12 and the outer shell 11, the heat generated during the operation of the spray gun 200 is adsorbed, so as to improve the service life of the spray gun 200 and the spraying effect.

[0053] Furthermore, the number of the first O-rings 5 is set to two, and an annular groove for installing the first O-ring 5 is provided on the outer side of the spray gun disc 1. By providing the first O-ring 5, the sealing effect between the spraying chamber 100 and the spray gun disc 1 is improved.

[0054] In one specific embodiment, a high-pressure gas channel 14 communicating with the gas outlet channel of the spray gun 200 is provided on the spray gun disc 1. The high-pressure gas channel 14 is used to supply high-pressure gas to the spray gun 200. These gases are ionized inside the spray gun 200 to form a plasma arc. The high temperature of the plasma arc melts the spraying material and accelerates it to be sprayed onto the surface of the workpiece, thereby forming a coating.

[0055] Specifically, common plasma gases include argon, nitrogen, hydrogen or a mixture thereof.

[0056] As Figure 3 shown, a powder feeding needle fixing seat 31 is fixed on the spray gun disc 1. The powder feeding needle 3 is fixed on the powder feeding needle fixing seat 31 through bolts. The position of the powder feeding needle 3 can be adjusted by adjusting the position of the bolts fixing the powder feeding needle 3, so as to adapt to different spraying requirements.

[0057] In one specific embodiment, in order to further adapt to different spraying tasks, a blowpipe fixing seat 41 is fixed on the spray gun disc 1. The blowpipe fixing seat 41 is fixed on the blowpipe fixing seat 41 by bolts. The position of the blowpipe 4 can be adjusted by adjusting the position of the bolts fixing the blowpipe 4, so as to meet the requirements of different spraying tasks.

[0058] The number of powder feeding needles 3 and blowpipes 4 is set to be multiple. The multiple powder feeding needles 3 and blowpipes 4 are all arranged around the circumference of the spray gun disc 1, and the powder feeding needles 3 and blowpipes 4 are distributed at intervals. The outlets of the powder feeding needles 3 and blowpipes 4 both face the axis of the spray gun disc 1, so that the spraying of the target material is more concentrated and accurate. Moreover, multiple powder feeding needles 3 can simultaneously supply powder to the spray gun 200, increasing the powder supply, thereby improving the spraying speed. Multiple blowpipes 4 blow air simultaneously, which can more effectively accelerate and spray the molten or semi-molten powder onto the surface of the substrate to form a more uniform coating. The surrounding and spaced powder feeding needles 3 and blowpipes 4 can ensure the uniform distribution of the powder around the spray gun 200, avoiding the situation of too high or too low local powder concentration, thereby improving the uniformity and compactness of the coating.

[0059] The working process and beneficial effects of the present utility model are as follows:

[0060] First, the second O-ring 6 is arranged between the insulating pad 2 and the spray gun disc 1, and then the spray gun 200 is aligned with the central hole of the spray gun disc 1. The positions of the insulating pad 2 and the spray gun 200 are fixed by the pressing ring 7. On the one hand, it can enhance the sealing performance of the connection between the spray gun 200 and the spray gun disc 1, and on the other hand, it also provides necessary electrical insulation to ensure the safety of the operation. Before the spraying work, according to the work requirements, the positions of the bolts fixing the blowpipe 4 and the powder feeding needle 3 are adjusted to adjust the positions of the blowpipe 4 and the powder feeding needle 3 to meet the spraying task requirements. When the spray gun 200 is performing spraying work, multiple powder feeding needles 3 simultaneously supply powder to the spray gun 200, increasing the powder supply. At the same time, multiple blowpipes 4 blow air simultaneously, accelerating and spraying the molten or semi-molten powder onto the surface of the substrate to form a more uniform coating. The surrounding and spaced powder feeding needles 3 and blowpipes 4 can ensure the uniform distribution of the powder around the spray gun 200, avoiding the situation of too high or too low local powder concentration, thereby improving the uniformity and compactness of the coating; the heat generated when the spray gun 200 works is taken away by the coolant circulating in the internal cavity 13 of the spray gun disc 1, so as to reduce the working temperature of the spray gun 200, extend the service life of the spray gun 200, and improve the spraying effect.

[0061] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gun fixing device for a plasma spraying device, characterized in that, Comprising: A spray gun disc (1), mounted on the outer shell of the spraying chamber (100) for fixing the spray gun (200); An insulating member (2), disposed between the spraying chamber (100) and the spray gun disc (1), and fixedly arranged on the spray gun disc (1) through a compression ring (7); A powder feeding needle (3), arranged on the spray gun disc (1) and with its outlet facing the axis of the spray gun disc (1) for conveying metal powder; A blow pipe (4), arranged on the spray gun disc (1) and with its outlet facing the axis of the spray gun disc (1) for accelerating and spraying the molten or semi-molten powder onto the surface of the substrate; A first O-ring (5), located between the spray gun disc (1) and the spraying chamber (100); Wherein, the spray gun disc (1) includes an outer shell (11) and an inner shell (12), there is a cavity (13) between the outer shell (11) and the inner shell (12), and a coolant circulates in this cavity (13).

2. The gun fixing device of a plasma spraying device according to claim 1, characterized in that: A high-pressure gas passage (14) communicating with the air outlet passage of the spray gun (200) is provided on the spray gun disc (1).

3. The gun fixing device of a plasma spraying device according to claim 1, characterized in that: A second O-ring (6) is provided between the insulating member (2) and the spray gun disc (1).

4. The gun fixing device of a plasma spraying device according to claim 1, characterized in that: Two insulating members (2) are provided in total, and the two insulating members (2) are located on both sides of the spray gun flange of the spray gun (200).

5. The gun fixing device of a plasma spraying device according to claim 4, characterized in that: Threaded holes are provided on the spray gun disc (1), and the compression ring (7) is fixed on the spray gun disc (1) through bolts.

6. The gun fixing device of a plasma spraying device according to claim 1, characterized in that: A powder feeding needle fixing seat (31) is fixed on the spray gun disc (1), and the powder feeding needle (3) is fixed on the powder feeding needle fixing seat (31) through bolts.

7. The gun fixing device of a plasma spraying device according to claim 1, characterized in that: A blow pipe fixing seat (41) is fixed on the spray gun disc (1), and the blow pipe fixing seat (41) is fixed on the blow pipe fixing seat (41) through bolts. (It should be noted that there may be an error in this description. It is assumed that it means fixed on the spray gun disc (1).) 8. The gun fixing device of a plasma spraying device according to claim 1, characterized in that: The number of the powder feeding needles (3) and the blow pipes (4) are both set to be multiple. The multiple powder feeding needles (3) and blow pipes (4) are all arranged around the circumference of the spray gun disc (1), and the powder feeding needles (3) and the blow pipes (4) are distributed at intervals.

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