Spraying device suitable for high-viscosity coating

Abstract

The invention belongs to the technical field of paint spraying, and particularly relates to a spraying device suitable for high-viscosity paint. Comprising supports which are symmetrically distributed, the supports which are symmetrically distributed are jointly connected with a sliding frame in a sliding mode, the supports are provided with a first power module used for driving the sliding frame to move, the sliding frame is fixedly connected with a material conveying pipe, and the sliding frame is provided with a material supply module used for conveying coating into the material conveying pipe. The material conveying pipe is fixedly connected with a fixed disc, the fixed disc is in sliding connection with sliding blocks which are uniformly distributed in the circumferential direction, the sliding blocks are fixedly connected with fan-shaped nozzles, the fan-shaped nozzles are provided with fan-shaped spraying cavities, and the fan-shaped nozzles are fixedly connected with hoses communicated with the material conveying pipe. Paint is conveyed into the fan-shaped spraying cavities which are evenly distributed in the circumferential direction through the material conveying pipe and the hose, the sliding blocks which are evenly distributed in the circumferential direction drive the adjacent fan-shaped nozzles to be close to or away from each other so as to adapt to the inner diameter change condition of the corrugated pipe, and it is guaranteed that the sprayed annular paint evenly covers the inner wall of the corrugated pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint spraying, and mainly provides a spraying device suitable for high-viscosity paint. BACKGROUND

[0002] In the field of industrial protection and surface treatment, paint spraying on the inner wall of a metal bellows is a common and key process. The bellows is widely used in pipeline connection in the fields of automobile exhaust systems, engineering machinery, aerospace, etc. due to its unique bendability and pressure resistance. In order to ensure its stable work in a high-temperature, high-humidity or corrosive medium environment for a long time, a layer of special paint (such as epoxy resin, ceramic-based paint or thick paste type anticorrosive paint) with high viscosity and high solid content is often sprayed on the inner wall of the bellows to form a continuous, dense and uniform protective coating.

[0003] At present, the spraying on the inner wall of the workpiece is usually carried out by using a fixed automatic spraying system or a handheld spray gun. The mainstream technical scheme is to send an extended spray rod into the pipeline, and the atomizing nozzle (such as an air spraying, airless spraying or mixed gas spraying nozzle) at the end of the spray rod is driven by compressed air or high-pressure fluid to atomize and spray the paint on the pipe wall, trying to achieve the covering spraying on the entire inner wall. However, the inner wall profile of the bellows presents a regular wave peak and wave trough alternation, which causes the distance between the nozzle and the surface to be sprayed to change dramatically and periodically during the entire spraying process. The existing automatic equipment usually uses uniform spraying parameters (such as spraying range). If the nozzle sprays the entire bellows with the spraying range at the wide diameter of the bellows, the paint will accumulate at the narrow diameter of the bellows. If the nozzle sprays the entire bellows with the spraying range at the narrow diameter of the bellows, the paint will form discontinuous coating at the wide diameter of the bellows. This uneven coating thickness problem caused by the distance change seriously affects the corrosion resistance and service life of the final product. SUMMARY

[0004] In order to overcome the shortcomings of the existing spraying method that cannot uniformly spray the bellows inner wall according to its profile, the present application provides a self-adaptive spraying device suitable for high-viscosity paint.

[0005] The technical scheme is: a spraying device suitable for high-viscosity paint, comprising symmetrically distributed supports, the symmetrically distributed supports are jointly and slidably connected with a sliding frame, the supports are provided with a first power module for driving the sliding frame to move, the sliding frame is fixedly connected with a feed pipe, the supports are provided with a feeding module for feeding paint into the feed pipe, the feed pipe is fixedly connected with a fixed disc, the fixed disc is slidably connected with circumferentially uniformly distributed sliding blocks, the sliding blocks are fixedly connected with fan-shaped nozzles, the fan-shaped nozzles are provided with fan-shaped spray cavities, the fan-shaped nozzles are fixedly connected with hoses in communication with the feed pipe, the feed pipe respectively feeds paint into adjacent fan-shaped spray cavities through circumferentially uniformly distributed hoses, and the distance between the circumferentially uniformly distributed fan-shaped nozzles is adjusted to spray the paint in the fan-shaped nozzles towards the inner wall of the bellows.

[0006] Further, the side of the feed pipe close to the fixed disc is rotatably connected with a rotating sleeve, the feed pipe is provided with a second power module for driving the rotating sleeve to rotate, the rotating sleeve is provided with a guide groove, and the sliding blocks are fixedly connected with L-shaped rods sliding in the guide groove.

[0007] Further, the guide groove is in the shape of a plum blossom, the guide groove is provided with circumferentially uniformly distributed convex lobe portions and concave lobe portions, the circumferentially uniformly distributed convex lobe portions and concave lobe portions are alternately distributed, the number of the convex lobe portions of the guide groove is equal to and corresponds to the number of the L-shaped rods.

[0008] Further, the extension line of the upper edge radius of the fan-shaped spray cavity is set as A, and the intersection point of adjacent A of the fan-shaped spray cavities is always located on the inner wall of the bellows.

[0009] Further, the maximum radius of the convex lobe portion of the guide groove to the axis of the bellows and the minimum radius of the concave lobe portion of the guide groove to the axis of the bellows are equal to the difference between the wide and narrow radii of the inner wall of the bellows.

[0010] Further, the symmetrically distributed supports are jointly and fixedly connected with symmetrically distributed fixed shells.

[0011] Further, the fixed shells are slidably connected with sliding sleeves.

[0012] Further, the fixed shells are provided with circumferentially uniformly distributed first discharge ports, and the sliding sleeves are provided with circumferentially uniformly distributed second discharge ports corresponding to adjacent first discharge ports.

[0013] Further, one of the sliding sleeves is fixedly connected with a fixed rod, and the other sliding sleeve is slidably connected with the fixed rod, a tension spring is fixedly connected between the sliding sleeve slidably connected with the fixed rod and the fixed rod, and the support close to the fixed rod is fixedly connected with a third power module for driving the fixed rod to move.

[0014] Further, the height difference between the second discharge ports on the sliding sleeve is greater than the height difference between the first discharge ports on the fixed shell.

[0015] The present application has the following advantages: the paint is delivered into the circumferentially uniformly distributed fan-shaped spray cavities through the feed pipe and the hose, the circumferentially uniformly distributed sliding blocks drive the adjacent fan-shaped nozzles to move closer to or away from each other to adapt to the change of the inner diameter of the bellows, so that the sprayed annular paint uniformly covers the inner wall of the bellows, the bellows is fixed by the fixed shell and the sliding sleeve, when spraying on one side of the inner wall of the bellows, the diffused misty paint is discharged from the other side, the path of the misty paint is increased, so that the discharge amount of the misty paint in the bellows is reduced, the paint is uniformly covered on the inner wall of the bellows, and the health of the workers is protected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the present application; Figure 2 It is a perspective view of the present application; Figure 3 It is a perspective view of the present application; Figure 4 It is a perspective view of the present application; Figure 5 It is a perspective view of the present application; Figure 6 It is a perspective view of the present application.

[0017] Reference signs: 1 - support, 111 - bellows, 2 - sliding frame, 3 - feed pipe, 4 - fixed disc, 5 - sliding block, 6 - fan-shaped nozzle, 601 - fan-shaped spray cavity, 7 - hose, 8 - rotating sleeve, 801 - guide groove, 9 - L-shaped rod, 10 - fixed shell, 1001 - first discharge port, 11 - sliding sleeve, 1101 - second discharge port, 12 - fixed rod, 13 - tension spring. DETAILED DESCRIPTION

[0018] The present application will be described in detail below with reference to the accompanying drawings.

[0019] Example 1

[0020] The existing paint spraying on the inner wall of the bellows adopts a unified spraying mode, but the diameter of the inner wall of the bellows changes constantly, which causes the distance between the bellows and the spray head to change constantly, resulting in uneven spraying in the bellows and affecting the spraying quality.

[0021] A spraying device suitable for high-viscosity paint, such as Figures 1-6As shown, it comprises two supports 1 symmetrically distributed, two supports 1 are slidably connected with sliding frame 2, support 1 is provided with a first power module for driving sliding frame 2 to move, the first power module comprises an electric slide rail (not shown in the figure) mounted on two supports 1, the electric slide rail is slidably connected with the electric slide block (not shown in the figure) fixedly connected with the sliding frame 2, the sliding frame 2 is fixedly connected with the feed pipe 3, the support 1 is provided with a feeding module for feeding paint into the feed pipe 3, the feeding module is a feeder (not shown in the figure) mounted on the support 1 and communicated with the feed pipe 3, the lower side of the feed pipe 3 is fixedly connected with the fixed disc 4, the fixed disc 4 is slidably connected with six slide blocks 5 uniformly distributed in the circumference, the slide block 5 is fixedly connected with the fan-shaped nozzle 6, the fan-shaped nozzle 6 is provided with a fan-shaped spray cavity 601, the fan-shaped nozzle 6 is fixedly connected with the hose 7 communicated with the feed pipe 3, the feed pipe 3 respectively feeds paint into the adjacent fan-shaped spray cavity 601 through the circumferentially uniformly distributed hose 7, the circumferentially uniformly distributed fan-shaped nozzles 6 are close to or away from each other to spray the paint in them to the inner wall of the corrugated pipe 111, so as to adapt to the change of the diameter of the inner wall of the corrugated pipe 111, so that the paint uniformly covers the inner wall of the corrugated pipe 111, the lower side of the feed pipe 3 is rotatably connected with the rotating sleeve 8 above the fixed disc 4, the feed pipe 3 is provided with a second power module for driving the rotating sleeve 8 to rotate, the second power module is a motor (not shown in the figure) mounted on the feed pipe 3, the motor and the rotating sleeve 8 are driven through the gear set (not shown in the figure), the rotating sleeve 8 is provided with a guide groove 801, the rotating sleeve 8 is a modular matching part (mainly determined by the size of the guide groove 801 thereon to match the corrugated pipe 111), when spraying different specifications of corrugated pipes 111, the initial position and the moving range of the fan-shaped nozzle 6 are adjusted by replacing different rotating sleeves 8, the slide block 5 is fixedly connected with the L-shaped rod 9 sliding in the guide groove 801, the shape of the guide groove 801 is plum blossom, the guide groove 801 is provided with circumferentially uniformly distributed convex lobe and concave lobe, the circumferentially uniformly distributed convex lobe and concave lobe are staggered, the number of convex lobe of the guide groove 801 is equal to and corresponds to the number of L-shaped rods 9, the second power module drives the rotating sleeve 8 to rotate, the rotating sleeve 8 drives the six L-shaped rods 9 to approach or move away from each other through the guide groove 801, the extension line of the upper edge radius of the fan-shaped spray cavity 601 is A, the intersection of adjacent fan-shaped spray cavities 601 is always located on the inner wall of the corrugated pipe 111, the distance from the intersection of adjacent fan-shaped spray cavities 601 to the axis of the corrugated pipe 111 is not less than the minimum radius of the inner wall of the corrugated pipe 111, not greater than the maximum radius of the inner wall of the corrugated pipe 111, so that the paint sprayed by the six fan-shaped spray cavities 601 forms an annular coating, the radius of the annular coating is greater than or equal to the minimum radius of the inner wall of the corrugated pipe 111, less than or equal to the maximum radius of the inner wall of the corrugated pipe 111, so that the sprayed paint forms a complete ring on the inner wall of the corrugated pipe 111, ensuring the uniformity of spraying,The difference between the maximum radius of the convex lobe of the guide slot 801 to the axis of the bellows 111 and the minimum radius of the concave lobe of the guide slot 801 to the axis of the bellows 111 is equal to the difference between the wide and narrow radii of the inner wall of the bellows 111, so that the position of the sector-shaped nozzle 6 is adjusted by the guide slot 801, the L-shaped rod 9 and the sliding block 5.

[0022] In the initial state, the sector-shaped nozzle 6 is located on the upper side of the support 1, when it is necessary to spray high-viscosity paint on the inner wall of the bellows 111, the operator first fixes the bellows 111 directly below the sector-shaped nozzle 6 by the existing fixing mechanism, so that the axis of the feed pipe 3 coincides with the axis of the bellows 111, when the fixing of the bellows 111 is completed, the operator starts the first power module to drive the sliding frame 2 to move the feed pipe 3 downward, the feed pipe 3 drives the parts on it to move downward, when the position relationship between the sector-shaped nozzle 6 and the bellows 111 is as shown in Figure 2 , the operator stops the first power module, the sector-shaped nozzle 6 is flush with the wide diameter of the bellows 111, at this time, the intersection of A on the adjacent sector-shaped spray cavity 601 is located on the ring line at the wide diameter of the inner wall of the bellows 111, then the operator starts the feed module, the feed module feeds paint into the feed pipe 3, the paint enters the adjacent sector-shaped spray cavity 601 through the hose 7 and sprays towards the inner wall of the bellows 111, at this time, the arc-shaped paint sprayed by the six sector-shaped spray cavities 601 forms a complete annular paint on the wide diameter of the inner wall of the bellows 111.

[0023] During the process of spraying paint by the sector-shaped spray cavity 601, the operator starts the first power module to drive the sliding frame 2 to move upward, the sliding frame 2 drives the feed pipe 3 and the parts on it to move upward, the six sector-shaped nozzles 6 move upward, in the process of upward movement of the sector-shaped nozzle 6, the operator starts the second power module to drive the rotating sleeve 8 to rotate, the rotating sleeve 8 drives the six L-shaped rods 9 to move close to each other through the guide slot 801 thereon, the six L-shaped rods 9 drive the six sector-shaped nozzles 6 to move close to each other through the adjacent sliding blocks 5, at this time, the radius of the annular paint sprayed by the six sector-shaped nozzles 6 gradually decreases, so as to adapt to the change of the inner diameter of the bellows 111 and ensure that the sprayed annular paint uniformly covers the inner wall of the bellows 111, when the distance between the six L-shaped rods 9 reaches the minimum value, the sector-shaped nozzle 6 is flush with the narrow diameter of the inner wall of the bellows 111, as the sector-shaped nozzle 6 continues to move upward, the radius of the annular paint sprayed by the six sector-shaped nozzles 6 gradually increases, the inner wall of the bellows 111 is uniformly covered by repeatedly repeating the above process, when the sector-shaped nozzle 6 is flush with the uppermost side of the bellows 111, the operator stops the feed module, the first power module and the second power module, the spraying process of the inner wall of the bellows 111 is completed, the operator releases the fixing of the bellows 111 and takes it down, the operator changes the rotating sleeve 8 to spray paint on bellows 111 with different inner diameters.

[0024] Example 2

[0025] During the process of spraying the inner wall of the bellows, part of the paint will be scattered from the upper and lower openings of the bellows, resulting in waste of paint, and the sprayed paint will affect human health.

[0026] On the basis of embodiment 1, a spraying device suitable for high-viscosity paint is provided, as shown in Figure 1 and Figure 2 Two supports 1 are fixedly connected with two fixed shells 10 symmetrically distributed up and down, the fixed shells 10 are slidingly connected with sliding sleeves 11, the fixed shells 10 are provided with first discharge ports 1001 uniformly distributed in the circumferential direction, the sliding sleeves 11 are provided with second discharge ports 1101 uniformly distributed in the circumferential direction and corresponding to the adjacent first discharge ports 1001 one by one, the lower sliding sleeve 11 is fixedly connected with a fixed rod 12, the upper sliding sleeve 11 is slidingly connected with the fixed rod 12, a tension spring 13 is fixedly connected between the upper sliding sleeve 11 and the fixed rod 12, the left support 1 is fixedly connected with a third power module for driving the fixed rod 12 to move, the third power module includes an electric push rod (not shown in the figure) mounted on the left support 1, the extension end of the electric push rod is fixedly connected with the fixed rod 12, and the height difference between the second discharge ports 1101 of the two sliding sleeves 11 is greater than the height difference between the first discharge ports 1001 of the two fixed shells 10.

[0027] When fixing the bellows 111, the operator moves the two sliding sleeves 11 away from each other, the lower sliding sleeve 11 drives the fixed rod 12 to move downward, the tension spring 13 is stretched, and then the bellows 111 is moved to between the two fixed shells 10 according to the positional relationship shown in Figure 2 When the moving process of the bellows 111 is completed, the operator releases the two sliding sleeves 11, the tension of the tension spring 13 is released to drive the two sliding sleeves 11 to move close to each other to fix the bellows 111 between the two fixed shells 10, and finally, the state of the two sliding sleeves 11 is as shown in Figure 2As shown, the lower sliding sleeve 11 blocks the adjacent first discharge port 1001, and the upper second discharge port 1101 communicates with the adjacent first discharge port 1001. When the lower half of the inner wall of the corrugated pipe 111 is sprayed, the excess misty paint in the corrugated pipe 111 moves upward through the upper first discharge port 1001 and the second discharge port 1101 and is discharged, the path of the misty paint is extended, and in the process of the misty paint moving upward, the gas on the upper side of the corrugated pipe 111 is pushed out of the corrugated pipe 111, thereby reducing the discharge amount of the misty paint from the corrugated pipe 111, ensuring that the paint is evenly covered on the inner wall of the corrugated pipe 111, and protecting the health of the workers. When the upper half of the inner wall of the corrugated pipe 111 is sprayed, the operator starts the third power module to drive the fixed rod 12 to move upward, the fixed rod 12 drives the lower sliding sleeve 11 to move upward, and the fixed rod 12 drives the upper sliding sleeve 11 to move upward through the tension spring 13. When the lower second discharge port 1101 communicates with the adjacent first discharge port 1001, the operator stops the third power module, and the upper sliding sleeve 11 blocks the upper first discharge port 1001. At this time, the excess misty paint in the corrugated pipe 111 is discharged from the lower first discharge port 1001 and the second discharge port 1101, and the distance of the misty paint downwardly discharged from the corrugated pipe 111 is also increased. When the spraying process of the corrugated pipe 111 is completed, the operator controls the third power module to drive the fixed rod 12 to move downward and reset. The operator can replace the fixed shell 10 and the sliding sleeve 11 of different diameters to fix the corrugated pipe 111 of different diameters.

[0028] Although embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be changed or modified without departing from the spirit and scope of the present application.

Claims

1. A spray device suitable for use with high viscosity coatings, characterized in that, The application relates to a coating device for a corrugated pipe, which comprises symmetrically distributed supports (1), the symmetrically distributed supports (1) being jointly connected with a sliding frame (2), the support (1) being provided with a first power module for driving the sliding frame (2) to move, the sliding frame (2) being fixedly connected with a material conveying pipe (3), the support (1) being provided with a feeding module for conveying paint into the material conveying pipe (3), the material conveying pipe (3) being fixedly connected with a fixed disc (4), the fixed disc (4) being slidingly connected with circumferentially uniformly distributed sliding blocks (5), the sliding blocks (5) being fixedly connected with fan-shaped nozzles (6), the fan-shaped nozzles (6) being provided with fan-shaped spray cavities (601), the fan-shaped nozzles (6) being fixedly connected with hoses (7) in communication with the material conveying pipe (3), the material conveying pipe (3) conveying paint into adjacent fan-shaped spray cavities (601) through the circumferentially uniformly distributed hoses (7) respectively, and the distance between the circumferentially uniformly distributed fan-shaped nozzles (6) is adjusted to spray the paint in the fan-shaped nozzles (6) towards the inner wall of the corrugated pipe (111).

2. A spray device suitable for use with high viscosity coatings as claimed in claim 1 wherein, The side, close to the fixed disc (4), of the material conveying pipe (3) is rotationally connected with a rotating sleeve (8), the material conveying pipe (3) is provided with a second power module for driving the rotating sleeve (8) to rotate, the rotating sleeve (8) is provided with a guide groove (801), and the sliding blocks (5) are fixedly connected with L-shaped rods (9) sliding in the guide groove (801).

3. A spray device suitable for use with high viscosity coatings as claimed in claim 2 wherein, The guide groove (801) is shaped as a plum blossom, the guide groove (801) is provided with circumferentially uniformly distributed convex lobe portions and concave lobe portions, the circumferentially uniformly distributed convex lobe portions and concave lobe portions are staggered, the number of the convex lobe portions of the guide groove (801) is equal to the number of the L-shaped rods (9) and corresponds to the L-shaped rods (9) one by one.

4. A spray device suitable for use with high viscosity coatings as claimed in claim 3 wherein, The extension line of the upper edge radius of the fan-shaped spray cavity (601) is set as A, and the intersection of adjacent A of the fan-shaped spray cavity (601) is always located on the inner wall of the corrugated pipe (111).

5. A jetting device suitable for use with high viscosity coatings according to claim 4, wherein, The maximum radius of the convex lobe portion of the guide groove (801) to the axis of the corrugated pipe (111) is equal to the difference between the minimum radius of the concave lobe portion of the guide groove (801) to the axis of the corrugated pipe (111) and the difference between the wide and narrow radii of the inner wall of the corrugated pipe (111).

6. A spray device suitable for use with high viscosity coatings as defined in claim 1, wherein, The symmetrically distributed supports (1) are jointly fixedly connected with symmetrically distributed fixed shells (10).

7. A spray device suitable for use with high viscosity coatings according to claim 6, wherein, The fixed shell (10) is slidingly connected with a sliding sleeve (11).

8. A spray device suitable for use with high viscosity coatings according to claim 7, wherein, The fixed shell (10) is provided with circumferentially uniformly distributed first discharge ports (1001), the sliding sleeve (11) is provided with circumferentially uniformly distributed second discharge ports (1101) corresponding to adjacent first discharge ports (1001) one by one.

9. A spray device suitable for use with high viscosity coatings according to claim 8, wherein, One sliding sleeve (11) is fixedly connected with a fixed rod (12), another sliding sleeve (11) is slidingly connected with the fixed rod (12), a tension spring (13) is fixedly connected between the sliding sleeve (11) and the fixed rod (12) which are slidingly connected with each other, and the support (1) close to the fixed rod (12) is fixedly connected with a third power module for driving the fixed rod (12) to move.

10. A jetting device suitable for use with high viscosity coatings according to claim 9, wherein, The height difference between the second discharge ports (1101) on different sliding sleeves (11) is greater than the height difference between the first discharge ports (1001) on different fixed shells (10).

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