Plasma spraying device and method with adjustable spraying distance and angle

Abstract

The invention provides a plasma spraying device with adjustable spraying distance and angle, comprising: a spraying box, which is internally provided with a spraying cavity in which a coiled material is subjected to plasma spraying; the spraying assembly is arranged in the spraying box, the spraying assembly comprises a driving motor and two sets of mounting plates, the adjacent sides of the two sets of mounting plates are meshed with each other, and spraying heads are mounted outside the mounting plates; the control unit cabinet is internally provided with a powder feeder and a control switch, and the control switch is used for controlling the powder feeder to act on the spraying assembly. By arranging the spraying assembly, when the driving motor drives one group of mounting plates to rotate, due to the fact that the two groups of mounting plates are meshed, the two groups of mounting plates can rotate in opposite directions; and the elastic layer is pulled in cooperation with the spring, so that the elastic layer is stretched and deformed, adjustment of the distance between the coiled material and the spraying head is achieved, and the spraying assembly and the distance adjusting assembly are matched with each other, so that the spraying angle and spraying distance adjusting effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of plasma spraying, and in particular to a plasma spraying device and method with adjustable spraying distance and angle. Background Art

[0002] Plasma thermal spraying is a technology for strengthening and modifying the surface of materials. It uses plasma arc as a heat source to heat ceramics, alloys, metals and other materials to a molten or semi-molten state, and sprays them at high speed onto the pre-treated workpiece surface to form a firmly attached surface layer. The characteristics of plasma thermal spraying include: ultra-high temperature characteristics, high spray particle velocity, and resistance to oxidation.

[0003] A metal surface plasma spraying device disclosed in Chinese Patent Publication No. CN202410601069.3 includes a body box, a body cavity is provided in the body box, a spraying mechanism is provided in the body cavity, the spraying mechanism includes a fixed platform fixedly connected to the inner wall of the body cavity, a first transmission shaft located on the lower side of the fixed platform is rotatably connected to the inner wall of the body cavity, a torsion ring located on the lower side of the body box is provided on the first transmission shaft, and the first transmission shaft can be driven to rotate by twisting the torsion ring, a clamping disc is provided on the first transmission shaft, and a first rotating shaft symmetrical about the center of the first transmission shaft is provided on the clamping disc, and the inner wall of the body cavity is provided with left and right opposite sides of the first transmission shaft. The sliding groove is called a sliding groove, which utilizes the connecting rod transmission principle to first clamp the metal plate to be sprayed, and then utilizes the gravity of the metal plate to make the expansion box and the upper surface of the metal plate be on the same horizontal plane, so that the edge of the metal surface can be sprayed with the same effect as normal spraying, so that the spraying effect is uniform, and after the spraying is completed, the plasma powder sprayed on the expansion box is recycled to save resources; not only that, the present invention can also adjust the flow rate of plasma powder according to the size of the metal plate to be sprayed, and increase the powder flow rate when the metal area is too large, so as to ensure the spraying effect and improve the spraying quality, and the present invention can also preheat the metal plate before spraying, and jet-cool the metal plate during spraying, so as to ensure the spraying quality.

[0004] In the prior art, the nozzle of the plasma spraying device is mostly sprayed in a fixed posture, which makes it inconvenient to adjust the angle and distance between it and the sprayed material. At the same time, the existing workpieces to be sprayed have various shapes, while the fixed components of the spraying device have a fixed shape. The fixed components are adapted to a small range of workpieces and cannot meet the uniform spraying requirements of workpieces of different shapes. Summary of the invention

[0005] Technical issues solved In view of the shortcomings of the prior art, the present invention provides the following technical solution: a plasma spraying device with adjustable spraying distance and angle, comprising: A spray box is provided with a spray chamber inside, and the coil is plasma sprayed in the spray chamber; A spraying assembly is arranged inside the spraying box, and the spraying assembly includes a driving motor and two sets of mounting plates, the adjacent sides of the two sets of mounting plates are meshed with each other, and a spray head is installed outside the mounting plate; A control unit cabinet is provided with a powder feeder and a control switch inside, and the control switch controls the powder feeder to act on the spraying assembly; The distance adjustment component is arranged inside the spraying chamber, and is used to adjust the distance between the coil and the spraying component, and is also used to maintain the conveying stability of the coil during plasma spraying; The conveying component is used for conveying the coiled material.

[0006] As a preferred embodiment of this embodiment, the driving motor is installed outside the spray box, and the driving motor drives any group of mounting plates to rotate through a main shaft.

[0007] As a preferred embodiment of the present invention, the distance adjustment assembly includes a fixed column and a rotating shaft, a double-headed hydraulic cylinder is installed on one side of the fixed column, an output end of the double-headed hydraulic cylinder is fixedly connected to an adjusting rod, one end of the adjusting rod is slidably connected to the inside of the fixed column, and the other end is fixedly connected to an adjusting disk, a rotating disk is rotatably connected to the inside of the adjusting disk, an elastic layer is arranged on the outside of the rotating shaft, and a plurality of groups of springs are installed on the side of the elastic layer adjacent to the rotating disk.

[0008] As a preference of this embodiment, a three-dimensional mesh-shaped structure is arranged inside the elastic layer, and the elastic layer is filled with a filling layer, and the filling layer is specifically made of thermoplastic material.

[0009] As a preference of this embodiment, an adjusting column is fixedly connected to one side of the rotating disk adjacent to the elastic layer, the adjusting column is slidably connected to the outside of the rotating shaft, and the adjusting column is slidably connected to the inside of the elastic layer.

[0010] As a preferred embodiment of this embodiment, the rotating shaft is rotatably connected to the inside of the spraying chamber, and a heater is installed inside the rotating shaft.

[0011] As a preferred embodiment of this embodiment, the conveying component includes a conveyor belt, and an adsorption component is installed inside the conveyor belt.

[0012] As a preferred embodiment of the present invention, the adsorption assembly includes an air pump and two groups of adsorption boxes arranged at intervals, a plurality of groups of adsorption holes distributed in an array are provided on the outside of the adsorption box, the air pump is installed between the two groups of adsorption boxes, and an adsorption groove is provided on the side of the adsorption box away from the air pump.

[0013] As a preferred embodiment of the present invention, a cavity is provided inside the adsorption box, the output end of the vacuum pump is connected to the cavity, a plurality of groups of air holes distributed in an array are arranged inside the adsorption tank, the positions of the plurality of groups of air holes correspond to the positions of the plurality of groups of adsorption holes, a horizontal partition plate is fixedly connected inside the adsorption tank, and the horizontal partition plate separates the plurality of groups of air holes distributed in an array horizontally.

[0014] As a preferred embodiment of the present invention, a method for spraying a coiled material adopts the above-mentioned plasma spraying device with adjustable spraying distance and angle, including passing one end of the coiled material around the elastic layer and making the coiled material fit with the outside of the conveyor belt, starting the vacuum pump to adsorb the coiled material on the outside of the conveyor belt, heating the filling layer by the heater, starting the double-headed hydraulic cylinder to drive the adjustment rod to move, so that the adjustment column is moved out from the inside of the elastic layer, and the elastic layer is stretched at the same time, and the conveyor belt is started to transport the coiled material to move, and the elastic layer is driven to rotate by friction. During this process, the filling layer is re-cooled and solidified, and the mounting plate is driven to rotate by the driving motor, and the angle of the output surface of the nozzle on the two groups of mounting plates is adjusted to spray to the outside of the coiled material, and the spraying powder is transported to the inside of the mounting plate through the control unit cabinet to complete the plasma spraying of the coiled material.

[0015] Beneficial Effects The present invention provides a plasma spraying device and method with adjustable spraying distance and angle, which has the following beneficial effects: The present invention provides a spraying assembly, wherein when a driving motor drives a group of mounting plates to rotate, the two groups of mounting plates are meshed so that the two groups of mounting plates can rotate toward each other, thereby adjusting the spraying angle and spraying distance between the nozzle and the coiled material, and the spring pulls the elastic layer so that the elastic layer is stretched and deformed, thereby adjusting the distance between the coiled material and the nozzle. The spraying assembly and the distance adjustment assembly cooperate with each other to improve the effect of adjusting the spraying angle and the spraying distance. At the same time, when the double-headed hydraulic cylinder drives the adjustment rod to move, the double-headed hydraulic cylinder will pull the adjustment disk, and the adjustment disk will pull the elastic layer through the spring, so that the elastic layer will be stretched and deformed, and then the elastic layer will become longer, so that the elastic layer can use coils of different widths. After the filling layer is heated by the heater, the outside of the elastic layer becomes soft. At this time, coils of different cross-sectional shapes can be better fitted with the outside of the elastic layer. After the filling layer is cured, the fitting with the coil is completed, which effectively improves the adaptability of the plasma spraying device. The three-dimensional mesh set inside the elastic layer can improve the overall strength of the elastic layer after the filling layer is cured. In addition, during the process of laminating the coil material to the outside of the elastic layer, the coil material will be preheated to reduce the temperature difference between the surface temperature of the coil material and the coating in the early stage of spraying, thereby improving the surface spraying effect of the coil material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic structural diagram of a plasma spraying device with adjustable spraying distance and angle according to the present invention; Figure 2 It is a schematic diagram of the positions of the spraying assembly and the distance adjustment assembly of the present invention inside the spraying chamber; Figure 3 It is a schematic diagram of the structure of the spraying assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the distance adjustment component of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the elastic layer of the present invention; Figure 6 It is a schematic diagram of the structure of the adjusting column and the rotating disk of the present invention; Figure 7 It is a schematic diagram of the structure of the conveying assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the adsorption component of the present invention.

[0017] In the figure: 100 spray box, 200 spray assembly, 201 drive motor, 202 mounting plate, 300 control unit cabinet, 400 distance adjustment assembly, 401 fixed column, 402 adjustment rod, 403 rotating shaft, 404 adjustment disk, 405 elastic layer, 406 spring, 407 double-headed hydraulic cylinder, 408 adjustment column, 409 filling layer, 410 rotating disk, 500 conveying assembly, 501 conveyor belt, 502 adsorption box, 503 vacuum pump, 504 adsorption tank. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0023] like Figure 1-8 As shown, this embodiment provides a plasma spraying device with adjustable spraying distance and angle, comprising: The spray box 100 has a spray chamber disposed therein, and the coil is plasma sprayed in the spray chamber; The spraying assembly 200 is arranged inside the spraying box 100. The spraying assembly 200 includes a driving motor 201 and two sets of mounting plates 202. The two sets of mounting plates 202 are meshed with each other at adjacent sides. A spray head is installed outside the mounting plate 202. The control unit cabinet 300 is provided with a powder feeder and a control switch inside, and the control switch controls the powder feeder to act on the spraying assembly 200; The distance adjustment component 400 is disposed inside the spray chamber and is used to adjust the distance between the coil and the spray component 200, and is also used to maintain the conveying stability of the coil during plasma spraying; The conveying assembly 500 is used for conveying the coiled material.

[0024] Specifically, when the coil is sprayed, the coil will be wound around the outside of the distance adjustment component 400, and the coil will be transported through the conveying component 500. The control unit cabinet 300 will transport the spray powder to the inside of the spray component 200, and the spray component 200 can spray the spray powder onto the outside of the coil.

[0025] like Figure 3 As shown, the driving motor 201 is installed outside the spray box 100, and the driving motor 201 drives any group of mounting plates 202 to rotate through the main shaft.

[0026] Specifically, when the driving motor 201 drives a group of mounting plates 202 to rotate, the two groups of mounting plates 202 are engaged, so that the two groups of mounting plates 202 can rotate toward each other, thereby adjusting the spraying angle and spraying distance between the nozzle and the coil.

[0027] like Figure 4-6As shown, the distance adjustment component 400 includes a fixed column 401 and a rotating shaft 403, a double-headed hydraulic cylinder 407 is installed on one side of the fixed column 401, the output end of the double-headed hydraulic cylinder 407 is fixedly connected to the adjusting rod 402, one end of the adjusting rod 402 is slidably connected to the inside of the fixed column 401, and the other end is fixedly connected to the adjusting disk 404, the adjusting disk 404 is rotatably connected to the rotating disk 410, an elastic layer 405 is arranged on the outside of the rotating shaft 403, and a plurality of groups of springs 406 are installed on the side adjacent to the elastic layer 405 and the rotating disk 410.

[0028] Specifically, when the adjusting rod 402 is driven to move by the double-headed hydraulic cylinder 407, the double-headed hydraulic cylinder 407 will pull the adjusting disk 404, and the adjusting disk 404 will pull the elastic layer 405 through the spring 406, so that the elastic layer 405 will be stretched and deformed, and then the elastic layer 405 will become longer, so that the elastic layer 405 can use coils of different widths.

[0029] Furthermore, when the adjusting rod 402 pulls the adjusting disk 404 to move, the adjusting column 408 will be pulled out from the elastic layer 405 , and the gap generated by the elastic layer 405 moving out will be filled by the filling layer 409 .

[0030] Furthermore, a three-dimensional mesh-shaped structure is arranged inside the elastic layer 405 , and a filling layer 409 is filled inside the elastic layer 405 . The filling layer 409 is specifically made of thermoplastic material.

[0031] Furthermore, an adjustment column 408 is fixedly connected to one side of the rotating disk 410 adjacent to the elastic layer 405 . The adjustment column 408 is slidably connected to the outside of the rotating shaft 403 , and the adjustment column 408 is slidably connected to the inside of the elastic layer 405 .

[0032] Furthermore, the rotating shaft 403 is rotatably connected inside the spray chamber, and a heater is installed inside the rotating shaft 403 .

[0033] Specifically, after the filling layer 409 is heated by the heater, the outer portion of the elastic layer 405 becomes soft, and at this time, coils with different cross-sectional shapes can better fit with the outer portion of the elastic layer 405 . After the filling layer 409 is cured, the fitting with the coil is completed.

[0034] The three-dimensional mesh structure provided inside the elastic layer 405 can improve the overall strength of the elastic layer 405 after the filling layer 409 is cured.

[0035] At the same time, during the process of laminating the coiled material with the outside of the elastic layer 405, the coiled material will be preheated to reduce the temperature difference between the surface temperature of the coiled material and the coating in the early stage of spraying, thereby improving the surface spraying effect of the coiled material.

[0036] It should be noted that the spring 406 pulls the elastic layer 405, causing the elastic layer 405 to be stretched and deformed, thereby adjusting the distance between the coil and the nozzle.

[0037] like Figure 7 and Figure 8 As shown, the conveying component 500 includes a conveyor belt 501, and an adsorption component is installed inside the conveyor belt 501.

[0038] Furthermore, the adsorption assembly includes an air pump 503 and two groups of adsorption boxes 502 arranged at intervals. The outside of the adsorption box 502 is provided with a plurality of groups of adsorption holes distributed in an array. The air pump 503 is installed between the two groups of adsorption boxes 502. The adsorption box 502 is provided with an adsorption groove 504 on the side away from the air pump 503.

[0039] Furthermore, a cavity is opened inside the adsorption box 502, the output end of the vacuum pump 503 is connected to the cavity, a plurality of groups of air holes distributed in an array are arranged inside the adsorption groove 504, and the positions of the plurality of air holes correspond to the plurality of adsorption holes. A horizontal partition plate is fixedly connected inside the adsorption groove 504, and the horizontal partition plate separates the plurality of groups of air holes distributed in an array in the horizontal direction.

[0040] Specifically, after the coil is attached to the outside of the conveyor belt 501, the vacuum pump 503 works, and the suction force generated will enter the adsorption groove 504 through the cavity, and finally act on the outside of the coil, so that the coil can be stably transported.

[0041] The present embodiment also provides a method for spraying a coiled material, using the above-mentioned plasma spraying device with adjustable spraying distance and angle, including passing one end of the coiled material around the elastic layer 405, and making the coiled material fit with the outside of the conveyor belt 501, starting the vacuum pump 503 to make the coiled material adsorbed on the outside of the conveyor belt 501, heating the filling layer 409 by the heater, starting the double-headed hydraulic cylinder 407 to drive the adjustment rod 402 to move, so that the adjustment column 408 is moved out from the inside of the elastic layer 405, and the elastic layer 405 is stretched at the same time, and the conveyor belt 501 is started to transport the coiled material to move, and the elastic layer 405 is driven to rotate by friction. During this process, the filling layer 409 is re-cooled and solidified, and the mounting plate 202 is driven to rotate by the driving motor 201, and the angle of the nozzle output surface on the two groups of mounting plates 202 is adjusted to spray to the outside of the coiled material, and the spraying powder is transported to the inside of the mounting plate 202 by the control unit cabinet 300 to complete the plasma spraying of the coiled material.

[0042] The plasma spraying device provided by the present invention comprises a spraying assembly 200, wherein a driving motor 201 drives a group of mounting plates 202 to rotate, and the two groups of mounting plates 202 are meshed, so that the two groups of mounting plates 202 can rotate toward each other, thereby adjusting the spraying angle and spraying distance between the nozzle and the coiled material, and the spring 406 pulls the elastic layer 405, so that the elastic layer 405 is stretched and deformed, so as to adjust the distance between the coiled material and the nozzle. The spraying assembly 200 and the distance adjustment assembly 400 cooperate with each other to improve the effect of adjusting the spraying angle and the spraying distance. At the same time, when the adjustment rod 402 is driven to move by the double-headed hydraulic cylinder 407, the double-headed hydraulic cylinder 407 will pull the adjustment disk 404, and the adjustment disk 404 will pull the elastic layer 405 through the spring 406, so that the elastic layer 405 is stretched and deformed, and then the elastic layer 405 becomes longer, so that the elastic layer 405 can use coils of different widths. After the filling layer 409 is heated by the heater, the outside of the elastic layer 405 becomes soft. At this time, coils of different cross-sectional shapes can be better bonded to the outside of the elastic layer 405. After the filling layer 409 is cured, the bonding with the coil is completed, which effectively improves the adaptability of the plasma spraying device. The three-dimensional mesh shape set inside the elastic layer 405 can improve the overall strength of the elastic layer 405 after the filling layer 409 is cured. Furthermore, during the process of laminating the coiled material to the outside of the elastic layer 405, the coiled material is preheated to reduce the temperature difference between the surface temperature of the coiled material and the coating in the early stage of spraying, thereby improving the surface spraying effect of the coiled material.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plasma spraying device with adjustable spraying distance and angle, characterized in that: include: A spray box (100) is provided with a spray chamber inside, and the coil is plasma sprayed in the spray chamber; A spraying assembly (200) is arranged inside the spraying box (100), the spraying assembly (200) comprising a driving motor (201) and two sets of mounting plates (202), the two sets of mounting plates (202) being meshed with each other on adjacent sides, and a spray head being installed outside the mounting plates (202); A control unit cabinet (300) is provided with a powder feeder and a control switch inside, and the control switch controls the powder feeder to act on the spraying assembly (200); A distance adjustment component (400) is disposed inside the spraying chamber and is used to adjust the distance between the coil and the spraying component (200), and is also used to maintain the conveying stability of the coil during plasma spraying; The conveying assembly (500) is used for conveying the coiled material.

2. The plasma spraying device with adjustable spraying distance and angle according to claim 1, characterized in that: The driving motor (201) is installed outside the spray box (100), and the driving motor (201) drives any group of mounting plates (202) to rotate via a main shaft.

3. The plasma spraying device with adjustable spraying distance and angle according to claim 1, characterized in that: The distance adjustment assembly (400) comprises a fixed column (401) and a rotating shaft (403); a double-headed hydraulic cylinder (407) is installed on one side of the fixed column (401); an adjustment rod (402) is fixedly connected to the output end of the double-headed hydraulic cylinder (407); one end of the adjustment rod (402) is slidably connected to the inside of the fixed column (401); and the other end is fixedly connected to an adjustment disk (404); a rotating disk (410) is rotatably connected to the inside of the adjustment disk (404); an elastic layer (405) is arranged on the outside of the rotating shaft (403); and a plurality of groups of springs (406) are installed on one side of the elastic layer (405) adjacent to the rotating disk (410).

4. The plasma spraying device with adjustable spraying distance and angle according to claim 3, characterized in that: A three-dimensional mesh is arranged inside the elastic layer (405), and a filling layer (409) is filled inside the elastic layer (405). Specifically, the filling layer (409) is a thermoplastic material.

5. The plasma spraying device with adjustable spraying distance and angle according to claim 4, characterized in that: An adjustment column (408) is fixedly connected to one side of the rotating disk (410) adjacent to the elastic layer (405), and the adjustment column (408) is slidably connected to the outside of the rotating shaft (403), and the adjustment column (408) is slidably connected to the inside of the elastic layer (405).

6. The plasma spraying device with adjustable spraying distance and angle according to claim 3, characterized in that: The rotating shaft (403) is rotatably connected to the inside of the spraying chamber, and a heater is installed inside the rotating shaft (403).

7. The plasma spraying device with adjustable spraying distance and angle according to claim 1, characterized in that: The conveying component (500) comprises a conveyor belt (501), and an adsorption component is installed inside the conveyor belt (501).

8. The plasma spraying device with adjustable spraying distance and angle according to claim 7, characterized in that: The adsorption assembly comprises an air pump (503) and two groups of adsorption boxes (502) arranged at intervals, the adsorption box (502) is provided with a plurality of groups of adsorption holes distributed in an array on the outside, the air pump (503) is installed between the two groups of adsorption boxes (502), and the adsorption box (502) is provided with an adsorption groove (504) on a side facing away from the air pump (503).

9. The plasma spraying device with adjustable spraying distance and angle according to claim 8, characterized in that: A cavity is provided inside the adsorption box (502), and the output end of the vacuum pump (503) is connected to the cavity. A plurality of groups of air holes distributed in an array are provided inside the adsorption tank (504), and the positions of the plurality of groups of air holes correspond to the positions of the plurality of groups of adsorption holes. A horizontal partition plate is fixedly connected inside the adsorption tank (504), and the horizontal partition plate separates the plurality of groups of air holes distributed in an array in a horizontal direction.

10. A method for spraying a coiled material, using the plasma spraying device with adjustable spraying distance and angle according to any one of claims 1 to 8, characterized in that: The method comprises: passing one end of the coiled material around the elastic layer (405) and making the coiled material fit with the outside of the conveyor belt (501); starting the vacuum pump (503) to make the coiled material adsorbed on the outside of the conveyor belt (501); heating the filling layer (409) by means of a heater; starting the double-headed hydraulic cylinder (407) to drive the adjustment rod (402) to move, so that the adjustment column (408) moves out from the inside of the elastic layer (405), and at the same time completing the stretching of the elastic layer (405); and at the same time starting the conveyor belt (501) to transport the coiled material to move, driving the elastic layer (405) to rotate by means of friction, during which the filling layer (409) is cooled and solidified again; driving the mounting plate (202) to rotate by means of a driving motor (201); adjusting the angle at which the output surfaces of the nozzles on the two sets of mounting plates (202) are sprayed to the outside of the coiled material; and transporting the spraying powder to the inside of the mounting plate (202) by means of a control unit cabinet (300), thereby completing the plasma spraying of the coiled material.

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