A high-temperature alloy wire surface coating spraying device

Abstract

The application discloses a high-temperature alloy wire surface coating spraying device, characterized in that the device comprises an alloy wire, a spraying mechanism and a storage mechanism, the spraying mechanism comprises a support, a supporting cylinder which is detachably installed above the support, a heating pipe which is fixedly installed at the top of the supporting cylinder, a plurality of electric arc spraying guns which are equidistantly arranged at the bottom of the heating pipe, a feeding pipe and an air inlet pipe which are respectively arranged on the electric arc spraying guns, a control panel which is arranged on the outer wall of the supporting cylinder, a pressing wheel which is arranged at the top of the supporting cylinder, and a roller which is fixedly installed below the support; the storage mechanism comprises a supporting seat, a servo motor which is arranged at one end of the supporting seat, and a storage wheel which is detachably installed at the output end of the servo motor, the alloy wire penetrates through the heating pipe and the support, and the alloy wire passes around the roller and is fixedly installed at one end on the storage wheel; the device can improve the compactness of the combination of the molten droplet and the alloy wire, reduce the formation of coating pores, uniformly spray the alloy wire, and make the coating thickness uniform.

Description

Technical Field

[0001] This invention relates to the field of sprayed wire processing technology, specifically to a spray coating device for the surface of high-temperature alloy wire. Background Technology

[0002] Based on the National Key Research and Development Program of China (Project No.: 2022YFF0503800), this study focuses on key scientific issues in solar polar regions and close-range exploration. High-temperature alloy wires are widely used in this field. Alloy wire coatings form a dense protective film on the surface of the wire, isolating it from external elements and preventing oxidation, corrosion, and wear. Alloy wire coating methods mainly include electroplating, chemical plating, thermal spraying, physical vapor deposition, and chemical vapor deposition. Thermal spraying allows for a wide range of coating thickness adjustment and has high production efficiency. Thermal spraying can be further divided into flame spraying, arc spraying, plasma spraying, and supersonic flame spraying. Arc spraying is widely used in the preparation of anti-corrosion and wear-resistant coatings on the surface of high-temperature alloy wires in industries such as steel, power, and chemicals. However, after spraying, insufficient coating and coating peeling can occur on the alloy wire surface.

[0003] Existing technologies, such as Chinese invention patent CN116377368A, disclose "an arc spraying device for zinc-copper-titanium alloy wire." This device filters the powder using a screen, uses liquid inside a storage tank to assist in cooling the heat and irritating gases inside the fixed chamber, and simultaneously performs secondary filtration of the gas to prevent direct emission into the air and impact on the surrounding working environment. The cooled and filtered gas is then sprayed onto the workpiece surface through an exhaust pipe and outlet, facilitating auxiliary cooling of the coating without waiting for it to naturally cool and solidify, thereby improving… While improving spraying efficiency, this structure has drawbacks. During alloy wire spraying, the surface temperature of the alloy wire differs from the coating temperature, resulting in different coefficients of thermal expansion. Furthermore, uneven shrinkage of particles within the coating generates internal stress. Excessive internal stress can lead to defects such as cracks and peeling in the coating. Additionally, the extremely rapid solidification of molten droplets during alloy wire spraying results in insufficient particle bonding, easily forming pores. These pores reduce the coating's density, affecting its corrosion resistance, wear resistance, and other properties. They can also lead to media penetration, further impacting the performance of the base material. Summary of the Invention

[0004] The purpose of this invention is to provide a method that can improve the tightness of the bond between molten droplets and alloy wires, reduce the formation of coating pores, and uniformly spray alloy wires to achieve a uniform coating thickness. In addition, the sprayed coating powder can be recycled.

[0005] To achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution: a high-temperature alloy wire surface coating spraying device, characterized in that it includes an alloy wire, a spraying mechanism, and a receiving mechanism. The spraying mechanism includes a bracket and a support cylinder detachably installed above the bracket. A heating tube is fixedly installed on the top of the support cylinder. Multiple arc spray guns are equidistantly arranged at the bottom of the heating tube. The arc spray guns are inclined downwards, and the spraying intersection of the multiple arc spray guns is located on the axis of the heating tube. A material feeding pipe and an air inlet pipe are respectively provided on the arc spray guns. The material feeding pipe and the air inlet pipe respectively pass through the support cylinder. A control panel is provided on the outer wall of the support cylinder. A pressure wheel is provided on the top of the support cylinder. A roller is fixedly installed below the bracket. The receiving mechanism includes a support base. A servo motor is provided at one end of the support base. The servo motor is electrically connected to the control panel. A receiving wheel is detachably installed at the output end of the servo motor. The alloy wire passes through the heating tube and the bracket, and the alloy wire passes around the roller so that one end is fixedly installed on the receiving wheel.

[0006] Preferably, the top of the bracket is provided with a support plate, the support plate is detachably connected to the support cylinder, the center of the support plate is provided with a cone, the center of the cone is provided with a through hole, and the through hole is located on the same axis as the heating tube.

[0007] Preferably, the support cylinder is a transparent structure, and multiple air outlets are provided on the outer wall of the support cylinder. A filter screen is provided on the inner side of the air outlet, and a pipe is provided on the outer side of the air outlet. The other end of the pipe is located below the support plate and directly opposite the alloy wire. A temperature sensor is provided on the outer wall of the support cylinder. The temperature sensor is located below the heating tube and directly opposite the alloy wire.

[0008] Preferably, the heating tube is provided with baffles at both ends, and a stabilizing hole is provided in the middle of the baffle. A coil is provided inside the heating tube and is electrically connected to the control panel. A nitrogen tube is provided at the top of the heating tube, and a gas concentration sensor is provided on the side wall of the heating tube and is electrically connected to the control panel.

[0009] Preferably, the roller has a hollow structure, and support rods are rotatably installed on both sides of the roller. The support rods are fixedly installed below the support plate, and a cooling pipe is provided through the support rod, which is connected to the inside of the roller.

[0010] Preferably, the storage wheel has an irregularly shaped hole in the middle, and a traction wire is fixedly installed on the storage wheel. One end of the traction wire is provided with a connector, which is detachably connected to the alloy wire.

[0011] Compared with related technologies, the high-temperature alloy wire surface coating spraying device provided by the present invention has the following beneficial effects:

[0012] 1. The present invention sets up a spraying mechanism to spray the alloy wire simultaneously with an arc spray gun surrounding the alloy wire, thereby making the coating of the alloy wire uniform. Furthermore, the alloy wire is heated by a heating tube before heating, which increases the atomic activity on the surface of the alloy wire, thereby improving the bonding degree between the molten droplets and the alloy wire.

[0013] This invention features a storage mechanism that uses a servo motor to drive a storage wheel to rotate. This rotation causes the traction wire to retract, which in turn moves the alloy wire. The interaction between the traction wire and the pressure wheel ensures that the alloy wire is taut after being pulled, facilitating the plating of the alloy wire.

[0014] This invention incorporates a nitrogen pipe and a gas concentration sensor. The nitrogen pipe fills the heating tube with nitrogen, ensuring that the alloy wire is in nitrogen during heating, thus preventing oxidation of the alloy wire after heating. Furthermore, the gas concentration sensor monitors the nitrogen concentration inside the heating tube, allowing for convenient replenishment of nitrogen as needed. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the spraying mechanism of the present invention;

[0018] Figure 3 This is a cross-sectional view of the support cylinder of the present invention;

[0019] Figure 4 This is a cross-sectional view of the heating tube of the present invention;

[0020] Figure 5 This is a cross-sectional view of the roller of the present invention;

[0021] Figure 6 This is a schematic diagram of the overall structure of the storage mechanism of the present invention;

[0022] Figure 7 This is an enlarged view of point A in this invention.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Alloy wire; 2. Spraying mechanism; 21. Bracket; 211. Support plate; 212. Cone; 213. Through hole; 22. Support cylinder; 221. Air outlet; 222. Filter screen; 223. Pipe; 224. Temperature sensor; 23. Heating tube; 231. Baffle; 232. Stabilizing hole; 233. Coil; 234. Nitrogen pipe; 235. Gas concentration sensor; 24. Arc spray gun; 25. Feed pipe; 26. Air inlet pipe; 27. Control panel; 18. Pressure wheel; 19. Roller; 291. Support rod; 292. Cooling pipe; 3. Storage mechanism; 31. Support base; 32. Servo motor; 33. Storage wheel; 331. Irregular hole; 332. Traction wire; 333. Connector. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] See Figures 1 to 7As shown, a high-temperature alloy wire surface coating spraying device is characterized by comprising an alloy wire 1, a spraying mechanism 2, and a storage mechanism 3. The spraying mechanism 2 includes a bracket 21 and a support cylinder 22 detachably installed above the bracket 21. A heating tube 23 is fixedly installed on the top of the support cylinder 22. Multiple arc spraying guns 24 are equidistantly arranged at the bottom of the heating tube 23. The arc spraying guns 24 are inclined downwards, and the spraying intersection of the multiple arc spraying guns 24 is located on the axis of the heating tube 23. A material feeding pipe 25 and an air inlet pipe 26 are respectively provided on the arc spraying guns 24. 25 and the air inlet pipe 26 respectively pass through the support cylinder 22. A control panel 27 is provided on the outer wall of the support cylinder 22. A pressure wheel 28 is provided on the top of the support cylinder 22. A roller 29 is fixedly installed below the bracket 21. The storage mechanism 3 includes a support base 31. A servo motor 32 is provided at one end of the support base 31. The servo motor 32 is electrically connected to the control panel 27. A storage wheel 33 is detachably installed at the output end of the servo motor 32. The alloy wire 1 passes through the heating tube 23 and the bracket 21, and the alloy wire 1 passes around the roller 29 so that one end is fixedly installed on the storage wheel 33. The alloy wire 1 is squeezed by the pressure roller 28, which makes the movement of the alloy wire 1 subject to resistance. With the cooperation of the receiving roller 33, the alloy wire 1 is taut, so that the alloy wire 1 can be accurately positioned at the spray intersection of the arc spray gun 24 during spraying, thus making the spraying of the alloy wire 1 more uniform. After being heated by the heating tube 23, the atomic activity of the alloy wire 1 surface increases, making the bonding between the alloy wire 1 and the molten droplet more compact.

[0028] The support plate 211 is provided on the top of the bracket 21. The support plate 211 is detachably connected to the support cylinder 22. A cone 212 is provided at the center of the support plate 211. A through hole 213 is provided through the center of the cone 212. The through hole 213 is located on the same axis as the heating tube 23. The through hole 213 allows the alloy wire 1 to pass through. The cone 212 can block the molten droplets during injection, preventing the molten droplets from entering the through hole 213, thereby collecting the scattered molten droplets on the support plate 211.

[0029] The support cylinder 22 is transparent, and multiple air vents 221 are provided on its outer wall. A filter screen 222 is installed inside each air vent 221, and a pipe 223 is installed outside each air vent 221. The other end of the pipe 223 is located below the support plate 211 and directly facing the alloy wire 1. A temperature sensor 224 is installed on the outer wall of the support cylinder 22, located below the heating tube 23 and directly facing the alloy wire 1. The transparent support cylinder 22 allows the user to observe the coating process of the alloy wire 1. The air vents 221 allow the gas ejected from the arc spray gun 24 to be discharged. Furthermore, the gas discharged through the air vents 221, after being filtered by the filter screen 222, cools the coated alloy wire 1 through the pipe 223.

[0030] The heating tube 23 is equipped with baffles 231 at both ends, and a stabilizing hole 232 is formed in the middle of the baffles 231. A coil 233 is installed inside the heating tube 23 and is electrically connected to the control panel 27. A nitrogen pipe 234 is installed at the top of the heating tube 23, and a gas concentration sensor 235 is installed on the side wall of the heating tube 23 and is electrically connected to the control panel 27. The alloy wire 1 is heated inside the heating tube 23 by the coil 233. In addition, the nitrogen pipe 234 fills the inside of the heating tube 23 with nitrogen to prevent the alloy wire 1 from being oxidized during heating. The gas concentration sensor 235 monitors the nitrogen concentration inside the heating tube 23 and replenishes nitrogen through the nitrogen pipe 234 when the nitrogen concentration decreases.

[0031] The roller 29 has a hollow structure, and support rods 291 are rotatably mounted on both sides of the roller 29. The support rods 291 are fixedly installed below the support plate 211. A cooling pipe 292 is installed through the support rods 291 and communicates with the interior of the roller 29. Coolant flows through the cooling pipe 292, filling the roller 29. When the alloy wire 1 drives the roller 29 to rotate, the roller 29 cools the alloy wire 1 through heat conduction, and the flow of coolant further cools the roller 29.

[0032] The collecting wheel 33 has a shaped hole 331 in the middle, and a traction wire 332 is fixedly installed on the collecting wheel 33. One end of the traction wire 332 is provided with a connector 333, which is detachably connected to the alloy wire 1. The shaped hole 331 makes it easier for the servo motor 32 to drive the collecting wheel 33 to rotate. After the collecting wheel 33 rotates, it pulls the traction wire 332 to retract. The traction wire 332 is connected to the alloy wire 1 through the connector 333, so that the collecting wheel 33 can pull the alloy wire 1 through the traction wire 332, making the alloy wire 1 taut, thereby making the alloy wire 1 more evenly sprayed.

[0033] Example 2

[0034] In this invention, the material conveying pipe 25 and the air inlet pipe 26 respectively convey metal powder and compressed gas through the pump body, and the pump body is electrically connected to the control panel 27.

[0035] The cooling pipe 292 of the present invention is filled with coolant, and a circulation pump is connected to the cooling pipe 292;

[0036] The connector 333 of the present invention uses an existing wire connection device;

[0037] The traction wire 332 of the present invention is resistant to high temperature and has strong tensile strength;

[0038] The clamping wheel 28 of the present invention is a conventional wire conveying device, which can adjust the extrusion pressure on the alloy wire 1;

[0039] The nitrogen pipe 234 and the air inlet pipe 26 of the present invention are equipped with solenoid valves, and the solenoid valves are electrically connected to the control panel 27.

[0040] The servo motor 32 and control panel 27 of this invention are powered by an external power supply.

[0041] The arc spray gun 24 of the present invention is electrically connected to the control panel 27, and the arc spray gun 24 has the same structure as the existing spraying mechanism 2.

[0042] The roller 29 and the support rod 291 of the present invention are sealed together, and the roller 29 can rotate on the support rod 291;

[0043] The temperature sensor 224 of the present invention is an infrared temperature sensor 224;

[0044] The pipe 223 of the present invention is provided with a sponge inside.

[0045] Example 3

[0046] Working principle: Before spraying the alloy wire 1, the traction wire 332 is pulled around the roller 29, and then the traction wire 332 is pulled through the through hole 213 and the heating tube 23. The alloy wire 1 is then passed through the pressure roller 28 and fixedly connected to the connector 333. Then, the nitrogen pipe 234 fills the heating tube 23 with nitrogen through the control panel 27. Simultaneously, the servo motor 32 and the arc spray gun 24 are started. The feed pipe 25 delivers metal particles to the arc spray gun 24. The metal particles are then applied to the arc spray gun 24. After melting, compressed gas is ejected from the air inlet pipe 26, causing the molten droplets to be ejected. After the servo motor 32 starts, it drives the receiving wheel 33 to rotate. The rotation of the receiving wheel 33 causes the traction wire 332 to contract. The contraction of the traction wire 332 tauts the alloy wire 1, and the alloy wire 1 is conveyed under the action of the traction wire 332. The traction wire 332 is heated by the coil 233 inside the heating tube 23, making the surface atoms of the alloy wire 1 active. The heating tube 23 is filled with nitrogen gas to prevent the alloy wire 1 from oxidizing after heating. 1. After continued feeding, temperature sensor 224 monitors the temperature of alloy wire 1 to prevent excessive temperature from altering its mechanical properties. The heated alloy wire 1 is then fed and sprayed by the arc spray gun 24 surrounding it, ensuring uniform coating. As the alloy wire 1 continues to be fed, it passes through through hole 213 and detaches from the support plate. At this point, the gas sprayed from the arc spray gun 24, after being filtered by filter screen 222 to remove molten droplets, passes through outlet 221 and pipe to obtain clean gas. 223 blows on the coated alloy wire 1 to cool it. Since the gas sprayed from pipe 223 is hot air, the alloy wire 1 will not cool down quickly to prevent the coating from cracking due to excessive cooling. After the alloy wire 1 continues to be conveyed, the alloy wire 1 passes around the roller 29, causing the roller 29 to rotate. Cooling liquid flows inside the roller 29. After heat conduction between the alloy wire 1 and the roller 29, the alloy wire 1 cools down quickly. As the receiving wheel 33 rotates, the alloy wire 1 is wound around the receiving wheel 33.

Claims

1. A device for spraying a coating onto the surface of a high-temperature alloy wire, characterized in that, The device includes an alloy wire (1), a spraying mechanism (2), and a storage mechanism (3). The spraying mechanism (2) includes a bracket (21) and a support cylinder (22) that is detachably installed above the bracket (21). A heating tube (23) is fixedly installed on the top of the support cylinder (22). Multiple arc spray guns (24) are equidistantly arranged at the bottom of the heating tube (23). The arc spray guns (24) are tilted downwards, and the spraying intersection of the multiple arc spray guns (24) is located on the axis of the heating tube (23). A material conveying pipe (25) and an air inlet pipe (26) are respectively provided on the arc spray guns (24). The material conveying pipe (25) and the air inlet pipe (26) respectively penetrate the support cylinder (22). The outer wall of the support cylinder (22) The upper part is equipped with a control panel (27), the top of the support cylinder (22) is equipped with a pressure wheel (28), and the lower part of the bracket (21) is fixedly installed with a roller (29); the storage mechanism (3) includes a support base (31), one end of the support base (31) is equipped with a servo motor (32), the servo motor (32) is electrically connected to the control panel (27), the output end of the servo motor (32) is detachably installed with a storage wheel (33), the alloy wire (1) passes through the heating tube (23) and the bracket (21), and the alloy wire (1) passes around the roller (29) so that one end is fixedly installed on the storage wheel (33). The alloy wire (1) first passes through the pressure wheel (28) and is heated in the heating tube (23).

2. The high-temperature alloy wire surface coating spraying device according to claim 1, characterized in that, The support plate (211) is provided on the top of the bracket (21). The support plate (211) is detachably connected to the support cylinder (22). A cone (212) is provided in the center of the support plate (211). A through hole (213) is provided in the center of the cone (212). The through hole (213) and the heating tube (23) are located on the same axis.

3. The high-temperature alloy wire surface coating spraying device according to claim 1, characterized in that, The support cylinder (22) is a transparent structure. Multiple air outlets (221) are provided on the outer wall of the support cylinder (22). A filter screen (222) is provided on the inner side of the air outlet (221), and a pipe (223) is provided on the outer side of the air outlet (221). The other end of the pipe (223) is located below the support plate (211) and directly facing the alloy wire (1). A temperature sensor (224) is provided on the outer wall of the support cylinder (22). The temperature sensor (224) is located below the heating tube (23) and directly facing the alloy wire (1). The temperature sensor (224) monitors the temperature of the alloy wire (1) to prevent the temperature of the alloy wire (1) from being too high, which would cause changes in its mechanical properties.

4. The high-temperature alloy wire surface coating spraying device according to claim 1, characterized in that, The heating tube (23) is provided with baffles (231) at both ends. A stabilizing hole (232) is provided in the middle of the baffle (231). A coil (233) is provided inside the heating tube (23). The coil (233) is electrically connected to the control panel (27). A nitrogen tube (234) is provided at the top of the heating tube (23). A gas concentration sensor (235) is provided on the side wall of the heating tube (23). The gas concentration sensor (235) is electrically connected to the control panel (27). The gas concentration sensor (235) monitors the nitrogen concentration inside the heating tube (23).

5. The high-temperature alloy wire surface coating spraying device according to claim 1, characterized in that, The roller (29) has a hollow structure. Support rods (291) are rotatably installed on both sides of the roller (29). The support rods (291) are fixedly installed below the support plate (211). A cooling pipe (292) is provided through the support rods (291). The cooling pipe (292) is connected to the inside of the roller (29).

6. The high-temperature alloy wire surface coating spraying device according to claim 1, characterized in that, The storage wheel (33) has a shaped hole (331) in the middle. A traction wire (332) is fixedly installed on the storage wheel (33). A connector (333) is provided at one end of the traction wire (332). The connector (333) is detachably connected to the alloy wire (1).

Images