Wire mesh surface nickel-aluminum coating spray device

Abstract

The application provides a wire mesh surface nickel-aluminum coating spraying device, which comprises a machine box, a spraying mechanism, a flattening mechanism and a matched controller. The machine box is provided with a material spraying cavity, and the machine box is provided with a feeding port and a discharging port which are communicated with the machine box. A plurality of supporting rollers which can horizontally convey the wire mesh are arranged between the feeding port and the discharging port. The spraying mechanism can spray a nickel-aluminum coating on the upper surface of the wire mesh after the wire mesh stops conveying. The flattening mechanism is provided with two, and the two flattening mechanisms can clamp the wire mesh on both sides of the wire mesh respectively after the wire mesh stops conveying and before the spraying mechanism works, and respectively pull the wire mesh outward along the width direction of the wire mesh to flatten the surface of the wire mesh. The wire mesh surface nickel-aluminum coating spraying device can effectively ensure the flattening of the wire mesh surface during the spraying process, thereby ensuring the uniform spraying, ensuring the spraying effect, improving the quality of the product, and having high practicability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of spraying equipment, and particularly relates to a wire mesh surface nickel-aluminum coating spraying device. BACKGROUND

[0002] Metal wire mesh is often used as an electrode, but in order to ensure the contact area of the metal wire mesh and the electrolyte, a nickel-aluminum coating is usually sprayed on the surface of the wire mesh, at which time a spraying device needs to be used, and plasma spraying is often used. The plasma spraying technology is a method for forming a firm surface layer by using a direct current driven plasma arc as a heat source to heat ceramic, alloy, metal and other materials to a molten or semi-molten state and spraying them at a high speed to the surface of a pretreated workpiece.

[0003] In the prior art, since the wire mesh has a certain length and a certain width, the spray gun needs to reciprocate along the width direction of the wire mesh, and in this process, the wire mesh needs to move intermittently so that the spraying material covers the entire surface of the wire mesh. However, the wire mesh surface is affected by the length direction traction, and the wire mesh surface will have wrinkles or protrusions distributed along the length direction, and the wire mesh surface is uneven. At this time, after the spray gun sweeps, the spraying material is uneven, and the coating on the wire mesh surface is uneven, which seriously affects the quality of the product and has poor practicability. SUMMARY

[0004] The wire mesh surface nickel-aluminum coating spraying device provided by the embodiment of the application can solve the problem of poor spraying effect of the existing wire mesh spraying device.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: a wire mesh surface nickel-aluminum coating spraying device is provided, which comprises:

[0006] A machine case is provided with a spraying material cavity, and the machine case is provided with a feeding port and a discharging port which are in communication with the machine case; a plurality of supporting rollers for horizontally conveying the wire mesh are arranged between the feeding port and the discharging port.

[0007] A spraying mechanism is arranged in the spraying material cavity and above the wire mesh, and is used for spraying the nickel-aluminum coating on the upper surface of the wire mesh after the wire mesh stops conveying.

[0008] Two flattening mechanisms are arranged, and the two flattening mechanisms are respectively arranged on the two sides of the wire mesh along the width direction of the wire mesh and are fixed on the machine case; the two flattening mechanisms are respectively used for clamping the wire mesh on the two sides of the wire mesh and respectively tensioning the wire mesh outward along the width direction of the wire mesh to flatten the surface of the wire mesh before the wire mesh stops conveying and before the spraying mechanism works; and

[0009] A matched controller.

[0010] In a possible implementation, each of the flattening mechanisms comprises a fixed frame, a vertical plate, a clamping assembly, and a driving assembly; the fixed frame is fixed on a cabinet, the fixed frame has two horizontal connecting plates, and the two horizontal connecting plates are arranged at intervals along the length direction of the screen; the vertical plate is provided with two vertical plates, and the two vertical plates are arranged on the two horizontal connecting plates respectively and are in sliding connection with the horizontal connecting plates along the width direction of the screen; the clamping assembly is provided with two clamping assemblies, and the two clamping assemblies are arranged on the two vertical plates respectively, and a spraying space for the spraying mechanism to work is formed between the two clamping assemblies; the driving assembly is arranged on the fixed frame and is connected with the two clamping assemblies, and is used for simultaneously controlling the two clamping assemblies to clamp the outer edge of the screen together and pull the two vertical plates to move outward to tension the screen.

[0011] In a possible implementation, each of the clamping assemblies comprises a sliding plate, a first connecting rod, a second connecting rod, a cross rod, and a clamping piece; the sliding plate is arranged on the vertical plate in sliding along the width direction of the screen, and the top end and the bottom end of the sliding plate are respectively provided with a rack; the first connecting rod is provided with two first connecting rods, and the two first connecting rods are arranged at the two sides of the sliding plate along the vertical direction, each of the first connecting rods has a first connecting rod first end and a first connecting rod second end, the first connecting rod first end is rotationally connected with the corresponding vertical plate, and a gear coaxially fixed on the first end of each of the first connecting rods is in meshing with one of the racks; the second connecting rod is provided with two second connecting rods, and the two second connecting rods are arranged at the two sides of the sliding plate along the vertical direction and are arranged at intervals with the two first connecting rods along the width direction of the screen, each of the second connecting rods has a second connecting rod first end and a second connecting rod second end, and each of the second connecting rod first ends is rotationally connected with the corresponding vertical plate; the second connecting rod has a length equal to that of the second connecting rod and is arranged in parallel; the cross rod is provided with two cross rods, and the two cross rods are arranged at the two sides of the sliding plate along the vertical direction, each of the cross rods is hingedly connected with the corresponding first connecting rod second end and the second connecting rod second end, and each of the cross rods has an end portion extending towards the screen; the clamping piece is provided with two clamping pieces, and the two clamping pieces are mounted on the extending ends of the two cross rods, and the two clamping pieces are used for clamping the screen by moving relatively with the two cross rods.

[0012] In each of the vertical plates, a limiting sliding groove for the sliding plate to slide is arranged.

[0013] In a possible implementation, the driving assembly comprises a pushing plate and a telescopic structure; the pushing plate is arranged along the length direction of the screen, and two ends of the pushing plate are respectively connected with two vertical plates in a sliding mode; the two ends of the pushing plate are respectively provided with a compensation connecting structure connected with the two sliding plates; the telescopic structure is arranged on the fixed frame, and a telescopic end of the telescopic structure is connected with the pushing plate.

[0014] In a possible implementation, the telescopic structure is a servo cylinder.

[0015] In a possible implementation, each compensation connecting structure comprises a fixed column, a limiting plate, a spring and a pressure sensor; one end of the fixed column is fixedly connected with the pushing plate, and the other end of the fixed column extends along the width direction of the screen; the limiting plate is fixedly arranged on the extending end of the fixed column; the spring is sleeved on the fixed column, and one end of the spring abuts against the limiting plate; the pressure sensor is arranged between the spring and the limiting plate, and is electrically connected with the controller.

[0016] In a possible implementation, one end of each sliding plate is provided with a limiting cavity for the fixed column to extend into and for the limiting plate to slide, and the limiting cavity penetrates through the sliding plate along the width direction of the screen; the other end of the spring abuts against the limiting cavity.

[0017] In a possible implementation, each horizontal connecting plate is provided with two long strip sliding openings, and the length direction of each long strip sliding opening is arranged at an angle with the width direction of the screen.

[0018] In a possible implementation, each vertical plate is provided with two sliding columns, and the two sliding columns are arranged in a vertical direction and are respectively arranged in the two long strip sliding openings, and the two vertical plates are used to move away from the screen and move away from each other after the pushing plate is pulled.

[0019] In a possible implementation, the bottom of each horizontal connecting plate is provided with two tension springs, and each tension spring corresponds to each sliding column; one end of each tension spring is fixedly connected with the horizontal connecting plate, and the other end of each tension spring is connected with the corresponding sliding column, and the tension spring is used to pull the sliding column to make the vertical plate have a tendency to move towards the screen along the width direction of the screen.

[0020] In a possible implementation, the initial tension of each tension spring is greater than the initial elastic force of each spring.

[0021] In a possible implementation, the spraying mechanism comprises a fixed seat, a sliding seat, a lead screw and a driver; the fixed seat is fixed on the cabinet, and two guide rods arranged along the width direction of the screen are arranged on the fixed seat; the sliding seat is slidingly arranged on the two guide rods, and a spray gun is detachably installed on the sliding seat; the lead screw is rotationally arranged on the fixed seat and is in screw connection with a nut part on the sliding seat; and the driver is fixed on the fixed seat, and a power output end is connected with one end of the lead screw.

[0022] In the present implementation, the spraying mechanism arranged inside the cabinet can ensure that the surface of the screen is sprayed with a nickel-aluminum coating. The flattening mechanism can clamp and tension the screen along the width direction of the screen after the screen stops conveying and before the spraying operation, so as to eliminate wrinkles and effectively ensure the flatness of the screen surface during the screen spraying process, thereby ensuring uniform spraying, ensuring the spraying effect, improving the quality of the product, and having strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structure schematic view of the screen surface nickel-aluminum coating spraying device provided by the embodiment of the present application (one side wall of the cabinet is cut open);

[0024] Figure 2 A structure schematic view of the flattening mechanism of the screen surface nickel-aluminum coating spraying device provided by the embodiment of the present application Figure 1 ;

[0025] Figure 3 A structure schematic view of the flattening mechanism of the screen surface nickel-aluminum coating spraying device provided by the embodiment of the present application Figure 2 ;

[0026] Figure 4 A side structure schematic view (cutaway view) of the clamping assembly of the screen surface nickel-aluminum coating spraying device provided by the embodiment of the present application;

[0027] Figure 5 A Figure 4 structure schematic view of the screen surface nickel-aluminum coating spraying device provided by the embodiment of the present application is provided;

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 10, cabinet; 11, spraying cavity; 12, feeding port; 13, discharging port; 14, supporting roller; 20, spraying mechanism; 21, fixed seat; 22, sliding seat; 23, screw rod; 24, driver; 30, flattening mechanism; 31, fixed frame; 311, horizontal connecting plate; 312, long strip sliding port; 32, vertical plate; 321, limiting sliding groove; 322, sliding column; 323, tension spring; 33, clamping assembly; 331, sliding plate; 332, first connecting rod; 333, second connecting rod; 334, cross rod; 335, clamping piece; 336, rack; 337, gear; 34, driving assembly; 341, push plate; 342, telescopic structure; 343, compensation connecting structure; 3431, fixed column; 3432, limiting plate; 3433, spring; 3434, pressure sensor. DETAILED DESCRIPTION

[0030] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0031] Please refer to Figure 1 and Figure 2 , the present application will be described. The wire mesh surface nickel aluminum coating spraying device, including cabinet 10, spraying mechanism 20, flattening mechanism 30 and the matching controller. Cabinet 10 has spraying cavity 11, cabinet 10 is equipped with feeding port 12 and discharging port 13 which are communicated with cabinet 10. Between feeding port 12 and discharging port 13, a plurality of supporting rollers 14 are arranged, which can horizontally transmit the wire mesh. Spraying mechanism 20 is arranged in spraying cavity 11 and above the wire mesh, which can spray nickel aluminum coating on the upper surface of the wire mesh after the wire mesh stops transmitting. Flattening mechanism 30 is provided with two, two flattening mechanisms 30 are respectively located on both sides of the wire mesh along the width direction of the wire mesh, and are fixed on cabinet 10. Two flattening mechanisms 30 can respectively clamp the wire mesh on both sides of the wire mesh along the width direction of the wire mesh and tighten the wire mesh outward after the wire mesh stops transmitting and before the spraying mechanism 20 works, so as to flatten the surface of the wire mesh.

[0032] The wire mesh surface nickel aluminum coating spraying device provided by the embodiment can ensure that the surface of the wire mesh is sprayed with nickel aluminum coating compared with the prior art. The flattening mechanism 30 can clamp the wire mesh on both sides of the wire mesh along the width direction of the wire mesh and tighten the wire mesh after the wire mesh stops transmitting and before the spraying operation, which can eliminate wrinkles and effectively ensure the flatness of the wire mesh during the spraying process, thereby ensuring uniform spraying and spraying effect, improving the quality of the product, and having strong practicability.

[0033] In some embodiments, the leveling mechanism 30 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 Each leveling mechanism 30 includes a fixed frame 31, vertical plates 32, clamping components 33, and a driving component 34. The fixed frame 31 is fixed to the housing 10 and has two horizontal connecting plates 311 spaced apart along the length of the wire mesh. Two vertical plates 32 are provided, each mounted on one of the two horizontal connecting plates 311 and slidably connected to them along the width of the wire mesh. Two clamping components 33 are provided, each mounted on one of the two vertical plates 32, forming a spraying space between them for the spraying mechanism 20 to operate. The driving component 34 is mounted on the fixed frame 31 and connected to the two clamping components 33. It can simultaneously control the two clamping components 33 to clamp the outer edge of the wire mesh and pull the two vertical plates 32 outwards to tighten the wire mesh.

[0034] The two clamping components 33 can clamp two points on the screen respectively, and the area between the two clamping components 33 ensures that the spraying mechanism 20 can perform the spraying operation without interference. The two clamping components 33 are simultaneously controlled by the drive component 34, ensuring synchronous clamping. The vertical plate 32, under the action of the drive component 34, can further tighten the screen after it is clamped, thus ensuring the flatness of the screen.

[0035] It should be noted that the leveling mechanism 30 needs to be located between two adjacent idler rollers 14 to prevent interference with the idler rollers 14.

[0036] In some embodiments, the clamping component 33 may be employed as follows: Figure 4 The structure shown. See also Figure 4Each clamping assembly 33 comprises a sliding plate 331, a first connecting rod 332, a second connecting rod 333, a cross rod 334 and a clamping piece 335. The sliding plate 331 is slidably arranged on the vertical plate 32 along the width direction of the screen, and the top end and the bottom end of the sliding plate 331 are respectively provided with a rack 336. The first connecting rod 332 is provided with two, and the two first connecting rods 332 are respectively arranged on the two sides of the sliding plate 331 along the vertical direction. Each first connecting rod 332 has a first connecting rod 332 first end and a first connecting rod 332 second end, the first connecting rod 332 first end is rotationally connected with the corresponding vertical plate 32, and a gear 337 meshing with one of the racks 336 is coaxially fixed on the first end of each first connecting rod 332. The second connecting rod 333 is provided with two, and the two second connecting rods 333 are respectively arranged on the two sides of the sliding plate 331 along the vertical direction, and the two second connecting rods 333 are arranged at intervals along the width direction of the screen and the two first connecting rods 332. Each second connecting rod 333 has a second connecting rod 333 first end and a second connecting rod 333 second end, and the second connecting rod 333 first end is rotationally connected with the corresponding vertical plate 32. The second connecting rod 333 has the same length as the second connecting rod 333, and is arranged in parallel. The cross rod 334 is provided with two, and the two cross rods 334 are respectively located on the two sides of the sliding plate 331 along the vertical direction. Each cross rod 334 is hingedly connected with the corresponding first connecting rod 332 second end and second connecting rod 333 second end. Each cross rod 334 has an end portion extending towards the screen. The clamping piece 335 is provided with two, and the two clamping pieces 335 are respectively mounted on the extending ends of the two cross rods 334. The two clamping pieces 335 can move relative to the two cross rods 334 to clamp the screen.

[0037] Among them, each vertical plate 32 is provided with a limiting sliding groove 321 for the sliding plate 331 to slide.

[0038] The sliding plate 331 slides away from the screen direction, and the power can be transmitted to the two gears 337 through the two racks 336. The two first connecting rods 332 rotate synchronously with the two gears 337, and after being acted on by the two second connecting rods 333, the two cross rods 334 can move relative to each other in the vertical direction, so that the two clamping pieces 335 move relative to each other to clamp the screen. The first connecting rod 332, the second connecting rod 333 and the cross rod 334 form a parallel four-bar linkage structure, which can ensure the horizontal of the cross rod 334, and thus can ensure that the clamping process of the clamping piece 335 to the screen is only in the vertical direction.

[0039] In addition, in the process of the cross rod 334 moving, it will move in the width direction of the screen in addition to the vertical direction. Therefore, this structure can ensure that the clamping piece 335 is close to the screen during the clamping process, and the cross rod 334 is away from the screen during the non-clamping process, so as to avoid interference with the screen after the screen is relaxed.

[0040] In the embodiment, each clamping piece 335 is arranged along a vertical direction, and is bolted to the extending end of the cross bar 334. The end of each clamping piece 335 away from the cross bar 334 is provided with an abutting block, and a silica rubber pad is arranged.

[0041] In some embodiments, the driving assembly 34 can adopt the structure as shown in Figure 2 . Referring to Figure 2 , the driving assembly 34 comprises a push plate 341 and a telescopic structure 342. The push plate 341 is arranged along the length direction of the screen, and the two ends of the push plate 341 are respectively slidably connected to the two vertical plates 32. The two ends of the push plate 341 are respectively provided with a compensation connecting structure 343 connected to the two slide plates 331. The telescopic structure 342 is arranged on the fixed frame 31, and the telescopic end of the telescopic structure 342 is connected to the push plate 341.

[0042] The push plate 341 is slidably connected to the two vertical plates 32, which can ensure that the push plate 341 slides relative to the vertical plates 32. This structure can ensure that the push plate 341 moves the vertical plates 32 after clamping the screen. Preferably, the two ends of the push plate 341 are provided with limiting plug-in ends which are directly inserted into the limiting sliding grooves 321. Through the arrangement of the push plate 341, the telescopic structure 342 can drive the two clamping assemblies 33 to work simultaneously.

[0043] In addition, it should be noted that one end of the limiting sliding groove 321 is provided with an abutting surface along the width direction of the screen for the push plate 341 to abut, so as to ensure that the push plate can pull the vertical plates 32.

[0044] In some embodiments, the telescopic structure 342 can adopt the structure as shown in Figure 2 . Referring to Figure 2 , the telescopic structure 342 is a servo cylinder, which can be easily controlled and adjusted with high accuracy.

[0045] In some embodiments, the compensation connecting structure 343 can adopt the structure as shown in Figure 5 . Referring to Figure 5 , each compensation connecting structure 343 comprises a fixed column 3431, a limiting plate 3432, a spring 3433 and a pressure sensor 3434. One end of the fixed column 3431 is fixedly connected to the push plate 341, and the other end of the fixed column 3431 extends along the width direction of the screen. The limiting plate 3432 is fixedly arranged on the extending end of the fixed column 3431. The spring 3433 is sleeved on the fixed column 3431, and one end of the spring 3433 abuts against the limiting plate 3432. The pressure sensor 3434 is arranged between the spring 3433 and the limiting plate 3432, and is electrically connected to a controller.

[0046] Each of the sliding plates 331 is provided with a limiting cavity at one end for the fixing column 3431 to extend into and for the limiting plate 3432 to slide, and the limiting cavity penetrates the sliding plate 331 along the width direction of the wire mesh.

[0047] The compensation connecting structure 343 can provide a buffer through the spring 3433 to prevent the tension of the wire mesh after being pulled from being too large, and can also transmit a pressure signal to the pressure sensor 3434 to ensure that the controller can control the telescopic structure 342 to stop when the tension of the wire mesh reaches a certain value, thereby further preventing the wire mesh from being damaged, and the structure is simple and practical.

[0048] In some embodiments, the horizontal connecting plates 311 and the vertical plates 32 described above can adopt the structure as shown in Figure 2 to 3 As shown in Figure 2 to 3 Each of the horizontal connecting plates 311 is provided with two long sliding openings 312, and the length direction of each of the long sliding openings 312 is arranged at an angle with the width direction of the wire mesh.

[0049] Each of the vertical plates 32 is provided with two sliding columns 322, and the two sliding columns 322 are arranged in the vertical direction and are respectively slidably arranged in the two long sliding openings 312. The two vertical plates 32 can move away from the wire mesh and move away from each other under the pulling of the push plate 341.

[0050] Each of the horizontal connecting plates 311 is provided with two tension springs 323, and each of the tension springs 323 corresponds to each of the sliding columns 322. One end of each of the tension springs 323 is fixedly connected to the horizontal connecting plate 311, and the other end is connected to the corresponding sliding column 322 to pull the sliding column 322, so that the vertical plate 32 has a tendency to move towards the wire mesh along the width direction of the wire mesh.

[0051] The long sliding openings 312 arranged at an angle can make the two vertical plates 32 move away from the wire mesh while moving away from each other, which can ensure that the wire mesh is pulled tight in the width direction of the wire mesh, and can further pull the wire mesh in the length direction of the wire mesh, which can prevent wrinkles along the width direction of the wire mesh when the wire mesh is pulled tight in the width direction of the wire mesh, and can effectively ensure the flatness of the wire mesh in the spraying space, thereby ensuring the spraying effect.

[0052] In this embodiment, horizontal lap plates can be additionally provided on the vertical plates 32, the horizontal lap plates are slidably connected to the horizontal connecting plates 311, and the sliding columns 322 are arranged on the horizontal lap plates.

[0053] In addition, a tension sensor can be arranged at the end of each of the tension springs 323 and electrically connected to the controller to prevent the wire mesh from being damaged. The tension sensor is a prior art and will not be described here.

[0054] In some embodiments, the above-mentioned tension springs 323 and springs 3433 can adopt the structure as shown in Figure 3 Referring to Figure 3 , the total initial tension of each tension spring 323 is greater than the total initial elastic force of each spring 3433.

[0055] With regard to the initial tension and the initial elastic force, it can be understood that the entire flattening mechanism 30 is not working, and each component is in the initial position. Because the tension springs 323 and the springs 3433 are both provided in multiple, this structure can ensure that when the push plate 341 pulls the slide plate 331, the slide plate 331 moves first to ensure that the clamping work is completed first, preventing the vertical plate 32 from moving during this process, and then performing the tensioning action.

[0056] In some embodiments, the above-mentioned spraying mechanism 20 can adopt the structure as shown in Figure 1 Referring to Figure 1 , the spraying mechanism 20 includes a fixed seat 21, a sliding seat 22, a lead screw 23, and a driver 24. The fixed seat 21 is fixedly arranged on the cabinet 10, and the fixed seat 21 is provided with two guide rods arranged along the width direction of the screen. The sliding seat 22 is slidingly arranged on the two guide rods, and the spraying gun is detachably installed on the sliding seat 22. The lead screw 23 is rotationally arranged on the fixed seat 21, and is screwedly connected with the nut part on the sliding seat 22. The driver 24 is fixedly arranged on the fixed seat 21, and the power output end is connected with one end of the lead screw 23. The lead screw 23 drives the reciprocating movement of the sliding seat 22, which can ensure the stable movement of the spraying gun, and can ensure the spraying precision, thereby ensuring the spraying effect.

[0057] In this embodiment, the spraying gun needs to be connected with the material supplementing mechanism, which is a prior art and will not be described here.

[0058] The above-mentioned only for the preferred embodiments of the present application, and not to limit the present application, any modification, equivalent replacement and improvement within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A wire mesh surface nickel aluminide coating spray apparatus characterized by, The application relates to a nickel-aluminum coating spraying device for a wire mesh, which comprises the following parts: a machine box with a spraying cavity, wherein an inlet and an outlet are arranged on the machine box and communicate with the machine box; a plurality of supporting rollers for horizontally conveying the wire mesh are arranged between the inlet and the outlet; a spraying mechanism is arranged in the spraying cavity and above the wire mesh, and is used for spraying a nickel-aluminum coating on the upper surface of the wire mesh after the wire mesh stops conveying; two flattening mechanisms are arranged on the two sides of the wire mesh along the width direction of the wire mesh, and are fixed on the machine box, the two flattening mechanisms are used for clamping the wire mesh on the two sides of the wire mesh along the width direction of the wire mesh and respectively outwardly tensioning the wire mesh to flatten the surface of the wire mesh after the wire mesh stops conveying and before the spraying mechanism works; and a matched controller. The leveling mechanism comprises a fixed frame, vertical plates, clamping assemblies and a driving assembly; the fixed frame is fixed on a cabinet and has two horizontal connecting plates which are arranged at intervals along the length direction of the screen; the vertical plates are arranged at intervals along the width direction of the screen and are slidably connected with the horizontal connecting plates; the clamping assemblies are arranged on the vertical plates and form a spraying space for the spraying mechanism; the driving assembly is arranged on the fixed frame and is connected with the clamping assemblies to simultaneously control the clamping assemblies to clamp the outer edge of the screen and pull the vertical plates to move outward to tighten the screen; each clamping assembly comprises a sliding plate, first connecting rods, second connecting rods, a cross rod and a clamping piece; the sliding plate is slidably arranged on the vertical plate along the width direction of the screen and has a gear rack at the top end and the bottom end; the first connecting rods are arranged at intervals along the vertical direction on the two sides of the sliding plate; the second connecting rods are arranged at intervals along the vertical direction on the two sides of the sliding plate and are arranged at intervals along the width direction of the screen; the second connecting rods are hinged with the first connecting rods; the cross rod is arranged on the two sides of the sliding plate and is hinged with the second connecting rods; and the clamping piece is arranged on the cross rod.

2. The wire mesh surface nickel aluminide coating spray apparatus of claim 1, wherein, The driving assembly comprises a push plate and a telescopic structure; the push plate is arranged along the length direction of the screen and is slidably connected with the vertical plates at the two ends; the two ends of the push plate are provided with compensation connecting structures connected with the sliding plates; and the telescopic structure is arranged on the fixed frame and is connected with the push plate at the telescopic end.

3. The wire mesh surface nickel aluminide coating spray apparatus of claim 2, wherein, The telescopic structure is a servo cylinder.

4. The wire mesh surface nickel aluminide coating spray apparatus of claim 2, wherein, Each of the compensation connection structures comprises a fixed column, a limiting plate, a spring and a pressure sensor; one end of the fixed column is fixedly connected with the push plate, the other end of the fixed column extends along the width direction of the screen; the limiting plate is fixedly arranged on the extending end of the fixed column; the spring is sleeved on the fixed column, and one end of the spring abuts against the limiting plate; the pressure sensor is arranged between the spring and the limiting plate, and is electrically connected with the controller; Each of the compensation connection structures comprises a fixed column, a limiting plate, a spring and a pressure sensor; one end of the fixed column is fixedly connected with the push plate, the other end of the fixed column extends along the width direction of the screen; the limiting plate is fixedly arranged on the extending end of the fixed column; the spring is sleeved on the fixed column, and one end of the spring abuts against the limiting plate; the pressure sensor is arranged between the spring and the limiting plate, and is electrically connected with the controller; 5. The wire mesh surface nickel aluminide coating spray apparatus of claim 4, wherein, Each of the horizontal connection plates is provided with two long strip sliding openings, and the length direction of each long strip sliding opening is arranged at an angle with the width direction of the screen; Each of the horizontal connection plates is provided with two long strip sliding openings, and the length direction of each long strip sliding opening is arranged at an angle with the width direction of the screen; Each of the horizontal connection plates is provided with two long strip sliding openings, and the length direction of each long strip sliding opening is arranged at an angle with the width direction of the screen; 6. The wire mesh surface nickel aluminide coating spray apparatus of claim 5, wherein, The initial total tension of each of the springs is greater than the initial total elasticity of each of the springs.

7. The wire mesh surface nickel aluminide coating spray apparatus of claim 1, wherein, The spraying mechanism comprises a fixed seat, a sliding seat, a lead screw and a driver; the fixed seat is fixedly arranged on the cabinet, and the fixed seat is provided with two guide rods arranged along the width direction of the screen; the sliding seat is slidingly arranged on the two guide rods, and the spraying gun is detachably installed on the sliding seat; the lead screw is rotationally arranged on the fixed seat and is in screw connection with the lead screw nut part on the sliding seat; the driver is fixedly arranged on the fixed seat, and the power output end is connected with one end of the lead screw.

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