A plasma spraying device and method with adjustable spray distance and angle

Abstract

The application 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 coil material is subjected to plasma spraying; a spraying assembly, which is arranged inside the spraying box and comprises a driving motor and two groups of mounting plates, adjacent sides of the two groups of mounting plates are engaged with each other, and the mounting plates are externally provided with spray heads; and a control unit cabinet, which is internally provided with a powder feeder and a control switch, the control switch is used for controlling the powder feeder to act on the spraying assembly, the spraying assembly is arranged, when the driving motor drives one group of mounting plates to rotate, the two groups of mounting plates can rotate towards each other due to the engagement of the two groups of mounting plates, so that the spraying angle and spraying distance of the spray heads and the coil material are adjusted, the spring is pulled to pull the elastic layer, so that the elastic layer is stretched and deformed, the distance between the coil material and the spray heads is adjusted, and the spraying assembly and the distance adjusting assembly are matched to improve the adjustment effect of the spraying angle and the spraying distance.

Description

TECHNICAL FIELD

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

[0002] Plasma thermal spraying is a surface strengthening and surface modification technology, which uses plasma arc as a heat source to heat ceramic, alloy, metal and other materials to a molten or semi-molten state, and sprays them at high speed to the surface of a pretreated workpiece to form a firmly adhered surface layer. The characteristics of plasma thermal spraying include ultra-high temperature, high particle velocity and difficulty in oxidation.

[0003] A metal surface plasma spraying device disclosed in Chinese Patent Publication No. CN202410601069.3 includes a machine body box, a machine body cavity is arranged in the machine body box, a spraying mechanism is arranged in the machine body cavity, the spraying mechanism includes a fixed table fixedly connected to the inner wall of the machine body cavity, a first transmission shaft is rotatably connected to the lower side of the fixed table, a twisting ring is arranged on the first transmission shaft and located on the lower side of the machine body box, the first transmission shaft is driven to rotate by twisting the twisting ring, a clamping disc is arranged on the first transmission shaft, a first rotating shaft is symmetrically arranged on the clamping disc with respect to the center of the first transmission shaft, and a sliding groove is arranged on the inner wall of the machine body cavity and symmetrically arranged with respect to the first transmission shaft. The device uses the principle of link transmission to clamp the metal plate to be sprayed, and uses the gravity of the metal plate to make the expansion box and the upper surface of the metal plate on the same horizontal plane, so that the same effect as normal spraying is achieved when spraying the edge of the metal surface, the spraying effect is uniform, and the plasma powder sprayed on the expansion box is recycled after spraying, saving resources. Moreover, the flow of plasma powder can be adjusted according to the size of the metal plate to be sprayed, the powder flow is increased when the metal area is too large, so as to ensure the spraying effect and improve the spraying quality. In addition, the metal plate can be preheated before spraying, and the metal plate can be air-cooled during spraying, so as to ensure the spraying quality.

[0004] In the prior art, the spray head of the plasma spraying device is usually sprayed in a fixed posture, which makes it inconvenient to adjust the angle and distance with the sprayed material. Meanwhile, the existing workpieces to be sprayed have various shapes, and the fixed components of the spraying device have fixed shapes, so the range of workpieces adapted by the fixed components is small, and the uniform spraying of different shaped workpieces cannot be achieved. SUMMARY

[0005] Technical problems to be solved

[0006] In view of the deficiencies of the prior art, the present application provides the following technical solutions: a plasma spraying device with adjustable spraying distance and angle, comprising:

[0007] The spraying box is internally provided with a spraying cavity in which the coil material is subjected to plasma spraying;

[0008] The spraying assembly is arranged inside the spraying box and comprises a driving motor and two groups of mounting plates, the adjacent sides of the two groups of mounting plates are engaged with each other, and the mounting plates are externally provided with spray heads;

[0009] The control unit cabinet is internally provided with a powder feeder and a control switch, and the control switch is used to control the powder feeder to act on the spraying assembly;

[0010] The distance adjusting assembly is arranged inside the spraying cavity and is used to adjust the distance between the coil material and the spraying assembly and to maintain the conveying stability of the coil material during plasma spraying;

[0011] The conveying assembly is used to convey the coil material.

[0012] As a preferred embodiment of the present embodiment, the driving motor is arranged outside the spraying box, and the driving motor drives any one group of mounting plates to rotate through a main shaft.

[0013] As a preferred embodiment of the present embodiment, the distance adjusting assembly comprises a fixed column and a rotating shaft, a double-head hydraulic cylinder is arranged on one side of the fixed column, an adjusting rod is fixedly connected to the output end of the double-head hydraulic cylinder, one end of the adjusting rod is slidably connected inside the fixed column, the other end of the adjusting rod is fixedly connected with an adjusting disc, the adjusting disc is rotatably connected with a rotating disc inside, an elastic layer is arranged outside the rotating shaft, and a plurality of groups of springs are arranged on the side of the elastic layer adjacent to the rotating disc.

[0014] As a preferred embodiment of the present embodiment, a three-dimensional mesh is arranged inside the elastic layer, and the inside of the elastic layer is filled with a filling layer, and the filling layer is specifically a thermoplastic material.

[0015] As a preferred embodiment of the present embodiment, an adjusting column is fixedly connected to the side of the rotating disc adjacent to the elastic layer, the adjusting column is slidably connected outside the rotating shaft, and the adjusting column is slidably connected inside the elastic layer.

[0016] As a preferred embodiment of the present embodiment, the rotating shaft is rotatably connected inside the spraying cavity, and a heater is arranged inside the rotating shaft.

[0017] As a preferred embodiment of the present embodiment, the conveying assembly comprises a conveyor belt, and the conveyor belt is internally provided with an adsorption assembly.

[0018] As a preferred embodiment of the present embodiment, the adsorption assembly comprises a suction pump and two groups of interval arranged adsorption boxes, a plurality of groups of adsorption holes arranged in an array are formed on the outside of the adsorption boxes, the suction pump is arranged between the two groups of adsorption boxes, and an adsorption groove is formed on the side of the adsorption box away from the suction pump.

[0019] As a preferred embodiment of this 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 provided inside the adsorption tank, and the positions of the plurality of groups of air holes correspond to the positions of the plurality of groups of adsorption holes, and 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.

[0020] As a preferred embodiment of this 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 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 drive motor, and the angle of the output surface of the nozzle on the two sets 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.

[0021] Beneficial effects

[0022] The present invention provides a plasma spraying device and method with adjustable spraying distance and angle, which has the following beneficial effects:

[0023] The present invention provides a spraying assembly, wherein when a driving motor drives a set of mounting plates to rotate, the two sets of mounting plates engage, allowing the two sets of mounting plates to rotate toward each other, thereby adjusting the spraying angle and spraying distance between the nozzle and the coil. The spring pulls the elastic layer, causing the elastic layer to be stretched and deformed, thereby adjusting the distance between the coil 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 spraying distance.

[0024] At the same time, when the adjusting rod is driven to move by the double-headed hydraulic cylinder, the double-headed hydraulic cylinder will pull the adjusting disk, and the adjusting disk will pull the elastic layer through the spring, causing the elastic layer to be stretched and deformed, thereby lengthening the elastic layer, so that the elastic layer can use coils of different widths. After the filling layer is heated by the heater, the outer part of the elastic layer becomes soft. At this time, coils of different cross-sectional shapes can better fit with the outer part of the elastic layer. After the filling layer is cured, the bonding with the coil is completed, effectively improving the adaptability of the plasma spraying device. The three-dimensional mesh structure set inside the elastic layer can improve the overall strength of the elastic layer after the filling layer is cured.

[0025] 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

[0026] Figure 1 Schematic diagram of the structure of the plasma spraying device with adjustable spraying distance and angle according to the present invention;

[0027] Figure 2 Schematic diagram of the positions of the spraying assembly and the distance adjustment assembly of the present invention inside the spraying chamber;

[0028] Figure 3 It is a schematic structural diagram of the spray assembly of the present invention;

[0029] Figure 4 This is a schematic structural diagram of the distance adjustment component of the present invention;

[0030] Figure 5 is a schematic diagram of the cross-sectional structure of the elastic layer of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the adjusting column and the rotating disk of the present invention;

[0032] Figure 7 It is a schematic structural diagram of the conveying assembly of the present invention;

[0033] Figure 8 It is a schematic structural diagram of the adsorption component of the present invention.

[0034] In the figure: 100 spray box, 200 spray assembly, 201 drive motor, 202 mounting plate, 300 control unit cabinet, 400 distance adjustment assembly, 401 fixing column, 402 adjusting rod, 403 rotating shaft, 404 adjusting disk, 405 elastic layer, 406 spring, 407 double-headed hydraulic cylinder, 408 adjusting column, 409 filling layer, 410 rotating disk, 500 conveying assembly, 501 conveyor belt, 502 adsorption box, 503 vacuum pump, 504 adsorption tank. DETAILED DESCRIPTION

[0035] 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 are not to be construed as limiting the present invention.

[0036] 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 used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. 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.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] like Figure 1-8 As shown, this embodiment provides a plasma spraying device with adjustable spraying distance and angle, comprising:

[0041] The spray box 100 is provided with a spray chamber inside, and the coil is plasma sprayed in the spray chamber;

[0042] The spray assembly 200 is disposed inside the spray box 100. The spray assembly 200 includes a drive motor 201 and two sets of mounting plates 202. The two sets of mounting plates 202 are meshed with each other on adjacent sides. A spray head is installed on the outside of the mounting plates 202.

[0043] The control unit cabinet 300 is provided with a powder feeder and a control switch. The control switch controls the powder feeder to act on the spray assembly 200.

[0044] The distance adjustment assembly 400 is provided inside the spray chamber and is used to adjust the distance between the coil and the spray assembly 200 and to maintain the transport stability of the coil during plasma spraying;

[0045] The conveying assembly 500 is used for conveying the coiled material.

[0046] Specifically, when spraying the coil, 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 to the outside of the coil.

[0047] 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.

[0048] Specifically, when the driving motor 201 drives a set of mounting plates 202 to rotate, the two sets of mounting plates 202 are engaged, so that the two sets of mounting plates 202 can rotate toward each other, thereby adjusting the spraying angle and spraying distance between the nozzle and the coil.

[0049] 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 provided on the outside of the rotating shaft 403, and several groups of springs 406 are installed on the side adjacent to the elastic layer 405 and the rotating disk 410.

[0050] 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, causing the elastic layer 405 to be stretched and deformed, and then the elastic layer 405 becomes longer, so that the elastic layer 405 can use rolls of different widths.

[0051] Furthermore, when the adjusting rod 402 pulls the adjusting disk 404 to move, the adjusting column 408 is pulled out from the elastic layer 405 , and the gap created by the elastic layer 405 being moved out is filled by the filling layer 409 .

[0052] Furthermore, a three-dimensional mesh is provided inside the elastic layer 405 , and the elastic layer 405 is filled with a filling layer 409 , which is specifically made of thermoplastic material.

[0053] 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 is slidably connected to the inside of the elastic layer 405 .

[0054] Furthermore, the rotating shaft 403 is rotatably connected to the inside of the spray chamber, and a heater is installed inside the rotating shaft 403.

[0055] 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 adhere to the outer portion of the elastic layer 405. After the filling layer 409 is cured, the adhesion to the coil is completed.

[0056] 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.

[0057] At the same time, during the process of laminating the coiled material to 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.

[0058] 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.

[0059] 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.

[0060] Furthermore, the adsorption component includes an air pump 503 and two groups of adsorption boxes 502 arranged at intervals. Several groups of adsorption holes distributed in an array are opened on the outside of the adsorption box 502. The air pump 503 is installed between the two groups of adsorption boxes 502. An adsorption groove 504 is opened on the side of the adsorption box 502 away from the air pump 503.

[0061] Furthermore, a cavity is provided inside the adsorption box 502, the output end of the vacuum pump 503 is connected to the cavity, and 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 air holes correspond to the plurality 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 horizontally.

[0062] Specifically, after the coil is attached to the outside of the conveyor belt 501, the vacuum pump 503 works and the suction force generated enters the adsorption groove 504 through the cavity and finally acts on the outside of the coil, so that the coil can be transported stably.

[0063] This 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 the outside of the conveyor belt 501, starting the air pump 503 to adsorb the coiled material 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 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 friction, during which the filling layer 409 is re-cooled and solidified, driving the mounting plate 202 to rotate by the drive 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 the control unit cabinet 300 to complete the plasma spraying of the coiled material.

[0064] The plasma spraying device provided by the present invention comprises a spraying assembly 200, wherein a drive motor 201 drives a set of mounting plates 202 to rotate. Due to the meshing of the two sets of mounting plates 202, the two sets of mounting plates 202 can rotate toward each other, thereby adjusting the spray angle and spray distance between the nozzle and the web. The spring 406 pulls the elastic layer 405, causing the elastic layer 405 to undergo tensile deformation, thereby adjusting the distance between the web and the nozzle. The spraying assembly 200 and the distance adjustment assembly 400 cooperate with each other to improve the spray angle and spray distance adjustment effect.

[0065] Meanwhile, when the adjusting rod 402 is driven to move by the double-end hydraulic cylinder 407, the double-end hydraulic cylinder 407 pulls the adjusting disc 404, the adjusting disc 404 pulls the elastic layer 405 through the spring 406, so that the elastic layer 405 appears tensile deformation, and then the elastic layer 405 becomes longer, so that the elastic layer 405 can use different widths of the coiled material, after the filler layer 409 is heated by the heater, the outside of the elastic layer 405 becomes soft, at this time, the coiled material with different cross-sectional shapes can better fit the outside of the elastic layer 405, after the filler layer 409 is solidified, the fitting with the coiled material is completed, the adaptive range of the plasma spraying device is effectively improved, the three-dimensional net-shaped body arranged inside the elastic layer 405 can improve the overall strength of the elastic layer 405 after the filler layer 409 is solidified;

[0066] Moreover, in the process of fitting the coiled material with the outside of the elastic layer 405, the preheating of the coiled material is completed, so as to reduce the temperature difference between the surface temperature of the coiled material and the paint in the early spraying stage, and improve the surface spraying effect of the coiled material.

[0067] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which 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 coiled material is plasma sprayed in the spray chamber; A spray assembly (200) is disposed inside the spray box (100), the spray assembly (200) comprising a drive motor (201) and two sets of mounting plates (202), adjacent sides of the two sets of mounting plates (202) being engaged with each other, and a spray head being mounted on the outside of the mounting plates (202); A control unit cabinet (300) is provided with a powder feeder and a control switch therein, and the control switch controls the powder feeder to act on the spraying assembly (200); A distance adjustment component (400) is provided 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 transport stability of the coil during plasma spraying; A conveying assembly (500) for conveying coiled materials; 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 output end of the double-headed hydraulic cylinder (407) is fixedly connected to an adjustment rod (402); one end of the adjustment rod (402) is slidably connected to the interior 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 interior of the adjustment disk (404); an elastic layer (405) is provided on the exterior of the rotating shaft (403); and a plurality of groups of springs (406) are installed on a side of the elastic layer (405) adjacent to the rotating disk (410).

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 one set 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: A three-dimensional mesh body is provided 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.

4. The plasma spraying device with adjustable spraying distance and angle according to claim 3, characterized in that: An adjusting column (408) is fixedly connected to one side of the rotating disk (410) adjacent to the elastic layer (405), and the adjusting column (408) is slidably connected to the outside of the rotating shaft (403), and the adjusting column (408) is slidably connected to the inside of the elastic layer (405).

5. The plasma spraying device with adjustable spraying distance and angle according to claim 1, 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).

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

7. The plasma spraying device with adjustable spraying distance and angle according to claim 6, characterized in that: The adsorption assembly comprises an air extraction pump (503) and two groups of adsorption boxes (502) arranged at intervals, wherein the adsorption boxes (502) are provided with a plurality of adsorption holes distributed in an array on the outside, the air extraction 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 the side facing away from the air extraction pump (503).

8. The plasma spraying device with adjustable spraying distance and angle according to claim 7, 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.

9. 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 7, characterized in that: The method comprises the following steps: passing one end of the coil around the elastic layer (405) and making the coil fit the outside of the conveyor belt (501); starting the vacuum pump (503) so that the coil is 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) moves out from the inside of the elastic layer (405), and completing the stretching of the elastic layer (405); and simultaneously starting the conveyor belt (501) to transport the coil to move, driving the elastic layer (405) to rotate by friction, during which the filling layer (409) is recooled and solidified; driving the mounting plate (202) to rotate by the drive motor (201); adjusting the angle of the nozzle output surface on the two sets of mounting plates (202) spraying to the outside of the coil; and transporting the spraying powder to the inside of the mounting plate (202) by the control unit cabinet (300) to complete the plasma spraying of the coil.

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