A uniform coating spraying device for industrial furnace tubes

Abstract

This utility model relates to the field of furnace tube spraying technology, and more particularly to a uniform coating spraying device for the surface of industrial furnace tubes. The device includes a workbench with a spraying chamber at its top. Both the workbench and the spraying chamber have material inlet holes at their centers. A conical receiving tray is installed inside the material inlet hole, and a spiral guide groove is fixedly connected to the inner wall of the conical receiving tray. A discharge hole is opened on the outer wall of the conical receiving tray. By incorporating the spraying chamber, a blower, and a guide hood, this device creates a negative pressure environment within the spraying chamber, generating a centripetal airflow. This airflow carries splashed paint particles downwards, which are then combed by the guide blades to form a downward spiral flow, enhancing the entrainment of paint particles and preventing their deposition on the inner wall of the spraying chamber. This effectively reduces the diffusion of paint particles into the workshop, lowers dust pollution, protects the health of operators, and eliminates the need for expensive additional workshop dust removal equipment, thus reducing the company's environmental protection investment costs.

Description

Technical Field

[0001] This utility model relates to the field of furnace tube spraying technology, and in particular to a uniform spraying device for the surface coating of industrial furnace tubes. Background Technology

[0002] In the process of coating the surface of industrial furnace tubes, the efficiency of paint recovery and the control of coating uniformity during the spraying process are the core challenges affecting production costs and product quality.

[0003] In existing traditional furnace tube surface spraying processes, the spraying is mostly carried out in an open environment. Atomized paint particles, failing to adhere to the furnace tube surface, splash directly into the workshop, causing dust pollution, endangering the health of operators, and requiring additional workshop dust removal equipment, increasing the company's environmental protection investment. Furthermore, although some equipment has static receiving troughs, the lack of power means paint particles easily accumulate in the dead corners, creating unsanitary areas. Cleaning requires manual disassembly of the receiving trough, resulting in time-consuming maintenance and affecting production continuity. For rotary spraying furnace tubes, paint particles tend to aggregate towards the tube opening under centrifugal force. Traditional equipment lacks active uniformization or recovery measures, requiring operators to frequently adjust the spray gun angle and flow rate, resulting in high labor intensity and difficulty in ensuring consistency, leading to low efficiency in furnace tube spraying. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a uniform coating spraying device for the surface of industrial furnace tubes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A uniform coating spraying device for the surface of an industrial furnace tube includes a workbench, a spraying chamber on the top of the workbench, a material inlet hole at the center of both the workbench and the spraying chamber, a conical receiving plate inside the material inlet hole, a spiral guide groove fixedly connected to the inner wall of the conical receiving plate, and a discharge hole on the outer wall of the conical receiving plate, with a discharge pipe fixedly connected inside the discharge hole.

[0007] A flow guide shroud is provided directly above the conical receiving tray. The flow guide shroud and the inner wall of the spraying chamber form an annular negative pressure channel. Flow guide blades are fixedly connected to the inner wall of the flow guide shroud. A connecting pipe is connected to the top of the flow guide shroud through the suction end. An induced draft fan is provided on one side of the outer wall of the workbench. The end of the connecting pipe passes through the spraying chamber and is connected to the induced draft fan. An air valve is provided at the end of the connecting pipe near the induced draft fan.

[0008] Preferably, a mounting base is fixedly connected to the workbench, and two sets of drive motors are provided on one side of the outer wall of the mounting base. The output end of the upper drive motor is connected to a drive shaft, and the drive shaft is connected to a drive wheel through a transmission belt. The drive shaft and the drive wheel are alternately arranged at the output end of the drive motor. A threaded rod is fixedly connected to the end of the upper drive wheel, and a spray can is sleeved on the outer surface of the threaded rod. A nozzle is fixedly connected to the bottom of the spray can.

[0009] Preferably, a drive gear is connected to the end of the lower drive shaft, and a driven gear is connected to the end of the drive gear through a connecting gear. Both the ends of the drive gear and the driven gear are fixedly connected to a support roller shaft, and the furnace tube to be sprayed is sleeved on the outer surface of the support roller shaft.

[0010] Preferably, the end of the spray can is connected to a paint pipe, the end of the paint pipe is connected to a spray box, and a regulating valve is provided at the end of the paint pipe near the spray box.

[0011] Preferably, two sets of support rods are sequentially connected to the inner walls of the spraying chamber via support shafts. Each pair of support rods is connected by a connecting spring. A material leveling roller is fixedly connected between the two sets of support rods, and the outer wall of the material leveling roller abuts against the surface of the furnace tube.

[0012] Preferably, a support plate is fixedly connected to the bottom of the workbench, and a collection box is provided on the outer bottom of the support plate, with the bottom of the conical receiving tray extending into the interior of the collection box.

[0013] Preferably, a connecting recess is fixedly connected to the outer bottom of the support plate, an electric motor is installed in the connecting recess, the output end of the electric motor is connected to a telescopic drive rod, a circular groove is opened at the bottom of the conical receiving tray, and the end of the telescopic drive rod passes through the support plate, the collecting box and connects to the circular groove in sequence.

[0014] Preferably, a mounting plate is fixedly connected to the workbench, and a snap-fit ​​groove for supporting the placement of the roller shaft is provided on one side of the mounting plate. An observation window is provided on one side of the outer wall of the spraying chamber.

[0015] The beneficial effects of this utility model are:

[0016] This equipment, by setting up a spray booth, an exhaust fan, and a flow guide, can create a negative pressure environment inside the spray booth, generating a centripetal airflow. This airflow carries the splashed paint particles downwards, and then, through the combing of the flow guide blades, forms a downward spiral flow, enhancing the ability to entrain paint particles and preventing them from depositing on the inner wall of the spray booth. This effectively reduces the spread of paint particles into the workshop, lowers dust pollution, protects the health of operators, and eliminates the need for additional, expensive workshop dust removal equipment, significantly reducing the company's environmental protection investment costs.

[0017] This equipment uses an electric motor to drive a telescopic drive rod and a conical receiving tray to rotate. Under the action of centrifugal force, paint particles falling into the conical receiving tray are thrown to the edge and guided by a spiral guide channel. They then converge towards the discharge hole at the bottom center by gravity and are finally thrown into a collection box through a discharge pipe for centralized recycling. This active recycling method avoids the deposition of paint particles, eliminates the need for frequent manual cleaning, significantly extends the maintenance cycle, and significantly improves the continuity of production. It also increases the paint recovery rate and reduces paint waste.

[0018] This equipment, through the coordinated operation of a support roller, drive motor, regulating valve, threaded rod, and spray can, enables the furnace tube to rotate stably. Simultaneously, the spray can moves linearly along the trajectory of the threaded rod. During the rotating spraying process of the furnace tube, the leveling roller contacts the furnace tube, which can spread and compact the coating sprayed onto the surface of the furnace tube or adjust the thickness, ensuring the uniformity of the coating on the surface of the furnace tube. This automated spraying and leveling process reduces manual intervention, improves the consistency of coating quality, and significantly increases the efficiency of furnace tube spraying. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a uniform coating spraying device for the surface of an industrial furnace tube, as proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the internal connection structure between the workbench and the spraying chamber of an industrial furnace tube surface uniform coating spraying device proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the connection structure between the drive motor and the support roller shaft of a uniform coating spraying device for the surface of an industrial furnace tube, as proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the conical receiving tray structure of a uniform coating spraying device for the surface of an industrial furnace tube, as proposed in this utility model.

[0023] Figure 5 This utility model presents a schematic diagram of the connection structure between the guide shroud and the induced draft fan of an industrial furnace tube surface uniform coating spraying device.

[0024] In the picture:

[0025] 1. Workbench; 2. Spraying chamber; 3. Material inlet; 4. Conical receiving tray; 401. Spiral guide channel; 402. Discharge hole; 403. Discharge pipe; 404. Electric motor; 405. Telescopic drive rod; 5. Flow guide cover; 501. Flow guide vane; 502. Connecting pipe; 503. Exhaust fan; 6. Mounting base; 601. Drive motor; 602. Drive shaft; 603. Transmission belt; 604. Drive wheel; 7. Threaded rod; 701. Spraying tank; 702. Paint pipe; 703. Spraying box; 8. Drive gear; 801. Connecting gear; 802. Driven gear; 9. Support roller shaft; 901. Support rod; 902. Connecting spring; 903. Leveling roller; 10. Support plate; 11. Collection box; 12. Mounting plate; 13. Observation window. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0029] Example:

[0030] Reference Figure 1-5 A uniform coating spraying device for the surface of an industrial furnace tube includes a workbench 1, a spraying chamber 2 on the top of the workbench 1, a material inlet 3 at the center of both the workbench 1 and the spraying chamber 2, a conical receiving plate 4 inside the material inlet 3, a spiral guide groove 401 fixedly connected to the inner wall of the conical receiving plate 4, and a discharge hole 402 on the outer wall of the conical receiving plate 4, with a discharge pipe 403 fixedly connected inside the discharge hole 402.

[0031] A guide hood 5 is installed directly above the conical receiving tray 4. The guide hood 5 and the inner wall of the spraying chamber 2 form an annular negative pressure channel. Guide vanes 501 are fixedly connected to the inner wall of the guide hood 5. The top of the guide hood 5 is connected to a connecting pipe 502 through the suction end. An induced draft fan 503 is installed on one side of the outer wall of the workbench 1. The end of the connecting pipe 502 passes through the spraying chamber 2 and is connected to the induced draft fan 503. An air valve is installed at the end of the connecting pipe 502 near the induced draft fan 503.

[0032] A mounting base 6 is fixedly connected to the workbench 1. Two sets of drive motors 601 are provided on one side of the outer wall of the mounting base 6. The output end of the drive motor 601 located above is connected to a drive shaft 602. The drive shaft 602 is connected to a drive wheel 604 through a transmission belt 603. The drive shaft 602 and the drive wheel 604 are arranged alternately at the output end of the drive motor 601. A threaded rod 7 is fixedly connected to the end of the drive wheel 604 located above. A spray can 701 is sleeved on the outer surface of the threaded rod 7. A nozzle is fixedly connected to the bottom of the spray can 701.

[0033] The drive shaft 602 located below is connected to a drive gear 8 at its end. The end of the drive gear 8 is connected to a driven gear 802 via a connecting gear 801. Both the ends of the drive gear 8 and the driven gear 802 are fixedly connected to a support roller shaft 9. The outer surface of the support roller shaft 9 is fitted with the furnace tube to be sprayed.

[0034] The paint can 701 is connected to a paint pipe 702 at one end, and the paint pipe 702 is connected to a spray box 703 at the other end. A regulating valve is provided at the end of the paint pipe 702 near the spray box 703.

[0035] Two sets of support rods 901 are connected in sequence on both sides of the inner wall of the spraying chamber 2 via support shafts. Each pair of support rods 901 is connected by a connecting spring 902. A uniform roller 903 is fixedly connected between the two sets of support rods 901, and the outer wall of the uniform roller 903 abuts against the surface of the furnace tube.

[0036] A support plate 10 is fixedly connected to the bottom of the workbench 1. A collection box 11 is provided on the outer bottom of the support plate 10, and the bottom of the conical receiving tray 4 extends into the interior of the collection box 11.

[0037] A connecting recess is fixedly connected to the bottom of the support plate 10. A motor 404 is installed in the connecting recess. The output end of the motor 404 is connected to a telescopic drive rod 405. A circular groove is opened at the bottom of the conical receiving tray 4. The end of the telescopic drive rod 405 passes through the support plate 10 and the collection box 11 in sequence and is connected to the circular groove.

[0038] A mounting plate 12 is fixedly connected to the workbench 1. A snap-fit ​​groove is provided on one side of the mounting plate 12 for supporting the placement of the roller shaft 9. An observation window 13 is provided on one side of the outer wall of the spraying chamber 2.

[0039] In this embodiment, when it is necessary to spray the coating on the surface of the furnace tube, the furnace tube is first fitted onto the support roller shaft 9, and then the support roller shaft 9 is snapped into the snap-fit ​​groove. Then, the two drive motors 601 and the regulating valve are started sequentially. When the lower drive motor 601 runs, it drives the drive wheel 604, causing the transmission belt 603 to rotate. The rotation of the transmission belt 603 drives the drive shaft 602 to rotate. The rotation of the lower drive shaft 602 drives the drive gear 8 to rotate. The rotation of the drive gear 8 drives the connecting gear 801 and the driven gear 802 to mesh and rotate. Thus, when the drive gear 8 and the driven gear 802 rotate, they drive the support roller shaft 9 at its end to rotate. The rotation of the support roller shaft 9 drives the furnace tube on its surface to rotate. At this time, when the regulating valve is adjusted... When the valve is activated, the paint inside the spray box 703 is sprayed through the paint pipe 702 and from the nozzle below the spray tank 701 onto the surface of the furnace tube. Subsequently, when the drive motor 601 above runs, it drives the drive shaft 602 and the transmission belt 603 above to rotate. This causes the drive wheel 604 above to drive the threaded rod 7 to rotate. As the threaded rod 7 rotates, the spray tank 701 moves linearly along the trajectory of the threaded rod 7 through the thread action. This allows the nozzle to move along the surface of the furnace tube and spray it. During the rotation and spraying process of the furnace tube, the furnace tube comes into contact with the leveling roller 903. The leveling roller 903 can spread and compact the paint sprayed onto the surface of the furnace tube or adjust the thickness to ensure the uniformity of the coating on the surface of the furnace tube.

[0040] Specifically, during the coating process on the furnace tube surface, a large amount of waste material particles are generated around the furnace tube. At this time, the air valve is activated to start the induced draft fan 503. When the induced draft fan 503 is running, it draws air from inside the spraying chamber 2 through the suction port, thereby creating a negative pressure environment inside the spraying chamber 2. When air flows into the spraying chamber 2 from the gaps, it forms a centripetal airflow in the spraying chamber 2, which drives the paint particles splashed during the spraying process to move downward. Then, under the action of the guide vanes 501 on the inner wall of the guide hood 5, the airflow is combed into a spiral downward swirling flow, thereby enhancing the ability to entrain paint particles and preventing paint particles from depositing on the inner wall of the spraying chamber 2.

[0041] Furthermore, as the paint particles gradually descend and fall into the conical receiving tray 4, the motor 404 is activated. The motor 404 rotates the telescopic drive rod 405, which in turn rotates the conical receiving tray 4. As the conical receiving tray 4 rotates, the paint particles inside impact the surface of the tray and are thrown towards its edge under centrifugal force. At this point, under the influence of the spiral guide groove 401 on the inner wall of the conical receiving tray 4, they converge towards the discharge hole 402 at the bottom center by gravity. Subsequently, with the continuous rotation of the conical receiving tray 4, the paint particles are thrown out through the discharge hole 402 into the discharge pipe 403. Afterward, the paint particles and residual paint liquid form a mixture, which is then thrown into the collection box 11 through the discharge pipe 403, thus achieving centralized recovery of the remaining paint particles.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A uniform coating spraying device for the surface of industrial furnace tubes, comprising a workbench (1), characterized in that, The top of the workbench (1) is provided with a spraying chamber (2). Both the workbench (1) and the spraying chamber (2) are provided with a material inlet (3). A conical receiving plate (4) is provided in the material inlet (3). A spiral guide groove (401) is fixedly connected to the inner wall of the conical receiving plate (4). A discharge hole (402) is provided on the outer wall of the conical receiving plate (4). A discharge pipe (403) is fixedly connected in the discharge hole (402). A flow guide shroud (5) is provided directly above the conical receiving tray (4). The flow guide shroud (5) and the inner wall of the spraying chamber (2) form an annular negative pressure channel. A flow guide blade (501) is fixedly connected to the inner wall of the flow guide shroud (5). A connecting pipe (502) is connected to the top of the flow guide shroud (5) through the suction end. An induced draft fan (503) is provided on one side of the outer wall of the workbench (1). The end of the connecting pipe (502) passes through the spraying chamber (2) and is connected to the induced draft fan (503). An air valve is provided at the end of the connecting pipe (502) near the induced draft fan (503).

2. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 1, characterized in that, A mounting base (6) is fixedly connected to the workbench (1). Two sets of drive motors (601) are provided on one side of the outer wall of the mounting base (6). The output end of the drive motor (601) located above is connected to a drive shaft (602). The drive shaft (602) is connected to a drive wheel (604) through a transmission belt (603). The drive shaft (602) and the drive wheel (604) are alternately arranged at the output end of the drive motor (601). A threaded rod (7) is fixedly connected to the end of the drive wheel (604) located above. A spray can (701) is sleeved on the outer surface of the threaded rod (7). A nozzle is fixedly connected to the bottom of the spray can (701).

3. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 2, characterized in that, The drive shaft (602) located below is connected to a drive gear (8) at its end. The end of the drive gear (8) is connected to a driven gear (802) via a connecting gear (801). Both the ends of the drive gear (8) and the driven gear (802) are fixedly connected to a support roller shaft (9). The outer surface of the support roller shaft (9) is fitted with a furnace tube to be sprayed.

4. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 2, characterized in that, The paint can (701) is connected to a paint pipe (702) at one end, and a paint box (703) is connected to the other end of the paint pipe (702). A regulating valve is provided at one end of the paint pipe (702) near the paint box (703).

5. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 1, characterized in that, The inner walls of the spraying chamber (2) are connected in sequence by two sets of support rods (901) via support shafts. Each pair of support rods (901) is connected by a connecting spring (902). A uniform roller (903) is fixedly connected between the two sets of support rods (901). The outer wall of the uniform roller (903) abuts against the surface of the furnace tube.

6. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 1, characterized in that, The bottom of the workbench (1) is fixedly connected to a support plate (10), and a collection box (11) is provided on the outer bottom of the support plate (10). The bottom of the conical receiving tray (4) extends into the interior of the collection box (11).

7. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 6, characterized in that, The bottom of the support plate (10) is fixedly connected to a connecting recess, and a motor (404) is installed in the connecting recess. The output end of the motor (404) is connected to a telescopic drive rod (405). The bottom of the conical receiving tray (4) is provided with a circular groove. The end of the telescopic drive rod (405) passes through the support plate (10), the collection box (11) and is connected to the circular groove in sequence.

8. The uniform coating spraying equipment for the surface of industrial furnace tubes according to claim 3, characterized in that, A mounting plate (12) is fixedly connected to the workbench (1). A snap-fit ​​groove is provided on one side of the mounting plate (12) for placing the support roller shaft (9). An observation window (13) is provided on one side of the outer wall of the spraying chamber (2).

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