Spraying device for pressure-resistant composite air pipe

Abstract

The invention discloses a spraying device for a pressure-resistant composite air pipe, relates to the technical field of air pipe processing, and solves the problems of splashing of paint, poor working environment, high labor intensity and non-uniform spraying in the spraying process in a manner of manually holding the spraying device by hand, so that the thickness of a coating on the outer wall of the air pipe is non-uniform. The machine body comprises a spraying chamber, a spraying assembly arranged in the spraying chamber in a sliding mode and a rotary clamping assembly used for clamping a workpiece. Wherein the spraying chamber is a closed cavity, and the spraying chamber is provided with a material opening capable of being opened and closed; the spraying assembly comprises an atomizing nozzle arranged in the spraying chamber, and the machine body is provided with a driving assembly for controlling the atomizing nozzle to slide and spray; the rotary clamping assembly is located in the spraying chamber. The rotary clamping assembly comprises two clamping rollers rotating synchronously and two moving air cylinders arranged on the machine body, one clamping roller is rotationally arranged on the moving air cylinders, and the machine body is provided with a driving motor used for driving the clamping rollers to rotate.

Description

Technical Field

[0001] This application relates to the field of duct processing technology, and in particular to a spraying device for pressure-resistant composite ducts. Background Technology

[0002] In ventilation duct systems, pressure-resistant composite ducts are widely used in high-rise buildings, subway tunnels, industrial plants, and other applications requiring high airflow pressure stability due to their lightweight, high strength, and excellent sealing performance. To ensure that the ducts do not deform or leak under long-term high-pressure airflow impact, traditional spraying equipment only focuses on spraying pressure-resistant coatings (such as polyurethane, epoxy resin, or ceramic matrix composites) onto the inner wall of the duct to enhance structural rigidity and improve fatigue resistance, easily neglecting the spraying treatment of the outer wall of the duct.

[0003] Currently, most ductwork exterior coating is done manually using handheld sprayers. During the spraying process, paint can splatter, creating a poor working environment that can negatively impact the health of workers and increase labor intensity. Furthermore, handheld spraying can lead to uneven coating in certain areas of the ductwork, resulting in inconsistent coating thickness on the exterior wall and affecting its pressure resistance and sealing performance. Summary of the Invention

[0004] In order to improve the technical problems existing in the prior art, this application provides a spraying device for pressure-resistant composite air ducts.

[0005] This application provides a spraying device for pressure-resistant composite air ducts, which adopts the following technical solution:

[0006] A pressure-resistant composite air duct spraying device includes a body, the body including a spraying chamber, a spraying component slidably disposed in the spraying chamber, and a rotary clamping component for clamping the workpiece.

[0007] The spraying chamber is a sealed cavity with an openable and closable material inlet. The spraying assembly includes an atomizing nozzle located inside the spraying chamber, and the machine body is equipped with a drive assembly for controlling the sliding spraying of the atomizing nozzle. The rotating clamping assembly is located inside the spraying chamber. The rotating clamping assembly includes two synchronously rotating clamping rollers and two movable cylinders located on the machine body. One clamping roller is rotatably mounted on the movable cylinder, and the machine body is equipped with a drive motor for rotating the clamping roller.

[0008] Preferably, the piston rod of the movable cylinder is provided with a mounting block, and one clamping roller is assembled with one mounting block. One end of the clamping roller is rotatably connected to the mounting block. One of the clamping rollers is coaxially provided with a driven wheel, and the output shaft of the drive motor is coaxially provided with a driving wheel. The driving wheel and the driven wheel are meshed and connected. The two clamping rollers are synchronously driven by the motor, so that the workpiece rotates at a uniform speed during the spraying process.

[0009] Preferably, the system further includes a control system, the drive assembly including a movable robotic arm that moves back and forth along the axial direction of the workpiece, the moving speed of the robotic arm being dynamically matched with the rotational speed of the clamping rollers by the control system to ensure that the coating thickness deviation does not exceed 5%, and the atomizing nozzle being connected to a high-pressure paint pump.

[0010] Preferably, the atomizing nozzle has a fan-shaped or conical structure, its spraying angle is adjustable, and its spraying pressure ranges from 0.2 MPa to 0.8 MPa.

[0011] Preferably, the top of the spraying chamber is equipped with a negative pressure exhaust fan, which is connected to an activated carbon adsorber to treat the volatile organic compounds generated during spraying.

[0012] Preferably, the control system integrates a PLC module and a touch screen, used to adjust the rotation speed of the rotary clamping component, the movement path of the spraying component, and the spraying parameters.

[0013] Preferably, the control system has preset spraying modes, including uniform speed spraying mode, segmented thick coating mode and touch-up spraying correction mode, and monitors the coating thickness in real time through sensors.

[0014] In summary, this application includes at least one of the following beneficial effects:

[0015] 1. This application achieves dynamic matching between uniform workpiece rotation and spraying path by coordinating a rotary clamping assembly (synchronously rotating clamping rollers) and an atomizing nozzle driven by a robotic arm, ensuring that the coating thickness deviation is ≤5%. This solves the problem of uneven thickness caused by manual spraying, significantly improves the pressure resistance and sealing performance of the duct. Furthermore, this device also takes into account automation, environmental protection, and process precision. It is suitable for efficient spraying of the outer wall of composite ducts in high-pressure scenarios, significantly improving workpiece durability and reducing labor costs, and has high industrial application value.

[0016] 2. The spray booth adopts a closed design, combined with a negative pressure exhaust fan and activated carbon adsorber, to effectively collect and treat volatile substances from the paint, improve the working environment, reduce occupational health risks, and meet the requirements of green manufacturing;

[0017] 3. The movable cylinder driving the clamping roller in this application, in conjunction with gear meshing transmission (drive wheel and driven wheel), ensures that the air duct does not slide or rotate during the spraying process, thus avoiding coating defects; at the same time, the real-time matching of the robotic arm and the rotation speed further optimizes the uniformity of spraying. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the spraying device in this embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the control system workflow in this embodiment of the application.

[0020] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Spraying chamber; 3. Spraying assembly; 31. Atomizing nozzle; 4. Rotary clamping assembly; 41. Clamping roller; 411. Driven wheel; 42. Moving cylinder; 421. Mounting block; 43. Drive motor; 431. Drive wheel; 5. Drive assembly; 51. Robotic arm; 52. Crossbeam; 53. Slider; 54. Screw; 6. High-pressure paint pump; 7. Paint tank; 8. Negative pressure exhaust fan; 9. Touch screen. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] In addition, the term "multiple" should mean two or more.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] This application discloses a spraying device for pressure-resistant composite air ducts, comprising a body 1, which includes a spraying chamber 2, a spraying assembly 3 slidably disposed within the spraying chamber 2, a rotary clamping assembly 4 for holding the workpiece, and a control system. The spraying chamber 2 is a sealed cavity and is equipped with an openable / closable material inlet (not shown in the figure). Furthermore, photoelectric sensors are installed at the workpiece inlet and outlet; the spraying operation automatically stops when foreign objects are detected. During processing, the rotary clamping assembly 4 clamps the workpiece (air duct) at both ends and rotates it, then the spraying assembly 3 performs the spraying, achieving mechanized spraying.

[0028] Specifically, the spraying assembly 3 includes an atomizing nozzle 31 disposed inside the spraying chamber 2. The atomizing nozzle 31 has a fan-shaped or conical structure, its spraying angle is adjustable, and its spraying pressure range is 0.2MPa to 0.8MPa.

[0029] Furthermore, the machine body 1 is equipped with a drive assembly 5 for controlling the sliding spraying of the atomizing nozzle 31. The drive assembly 5 includes a movable robotic arm 51, which moves back and forth along the axial direction of the workpiece. Specifically, the machine body 1 is equipped with a crossbeam 52, within which a slider 53 is slidably connected. One end of the robotic arm 51 is mounted on the slider 53, and a screw 54, threadedly connected to the slider 53, is rotatably connected within the crossbeam 52. A motor is mounted on one end of the crossbeam 52, and the output shaft of the motor is coaxially fixed with the screw 54. The moving speed of the robotic arm 51 and the rotational speed of the clamping roller 41 are dynamically matched by a control system to ensure that the coating thickness deviation does not exceed 5%. The atomizing nozzle 31 is detachably connected to the robotic arm 51 by bolts. In addition, the atomizing nozzle 31 is connected to a high-pressure paint pump 6, the pressure of which is adjustable from 0.1 to 1.0 MPa. A filter with a screen precision of at least 100 mesh and a backwashing function is added at the outlet of the high-pressure paint pump 6. The top of the machine body 1 is equipped with a paint tank 7 that is connected to the high-pressure paint pump 6.

[0030] Furthermore, the rotary clamping assembly 4 is located inside the spraying chamber 2. The rotary clamping assembly 4 includes two synchronously rotating clamping rollers 41 and two movable cylinders 42 mounted on the machine body 1. The piston rods of the movable cylinders 42 are detachably connected to mounting blocks 421 by bolts, and one clamping roller 41 is assembled with one mounting block 421. One end of the clamping roller 41 is rotatably connected to the mounting block 421, and one of the clamping rollers 41 is coaxially fixed with a driven wheel 411. The machine body 1 is equipped with a drive motor 43 for driving the clamping rollers 41 to rotate, and the speed of the drive motor 43 is adjustable within the range of 5 to 30 rpm; the output shaft of the drive motor 43 is coaxially fixed with a driving wheel 431, and the driving wheel 431 is meshed with the driven wheel 411. During processing, the two clamping rollers 41 are driven synchronously by the drive motor 43, and the meshing transmission between the drive wheel 431 and the driven wheel 411 ensures that the air duct rotates without slipping during the spraying process, thus avoiding coating defects; at the same time, the real-time matching of the robotic arm 51 with the rotation speed further optimizes the uniformity of spraying.

[0031] Furthermore, a negative pressure exhaust fan 8 is installed at the top of the spray booth 2. The negative pressure exhaust fan 8 is connected to an activated carbon adsorber to treat the volatile organic compounds generated during spraying. It can effectively collect and treat the volatile compounds of the paint, improve the working environment, and reduce occupational health risks.

[0032] Furthermore, the control system integrates a PLC module and a touch screen 9 for adjusting the rotation speed of the rotating clamping assembly 4, the movement path of the spraying assembly 3, and the spraying parameters. Additionally, the control system has preset spraying modes, including a uniform speed spraying mode, a segmented thick coating mode, and a touch-up correction mode, and monitors the coating thickness in real time using an infrared thickness sensor.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spraying device for pressure-resistant composite air ducts, comprising a body (1), characterized in that: The machine body (1) includes a spraying chamber (2), a spraying assembly (3) slidably disposed in the spraying chamber (2), and a rotating clamping assembly (4) for clamping the workpiece; The spraying chamber (2) is a sealed cavity and is provided with an openable and closable material inlet; the spraying assembly (3) includes an atomizing nozzle (31) disposed inside the spraying chamber (2) and the machine body (1) is provided with a drive assembly (5) for controlling the sliding spraying of the atomizing nozzle (31); the rotating clamping assembly (4) is located inside the spraying chamber (2); the rotating clamping assembly (4) includes two synchronously rotating clamping rollers (41) and two moving cylinders (42) disposed on the machine body (1), one of the clamping rollers (41) is rotatably disposed on the moving cylinder (42), and the machine body (1) is provided with a drive motor (43) for driving the clamping rollers (41) to rotate.

2. The spraying device for pressure-resistant composite air ducts according to claim 1, characterized in that: The piston rod of the movable cylinder (42) is provided with a mounting block (421). One clamping roller (41) is assembled with one mounting block (421). One end of the clamping roller (41) is rotatably connected to the mounting block (421). One of the clamping rollers (41) is coaxially provided with a driven wheel (411). The output shaft of the drive motor (43) is coaxially provided with a driving wheel (431). The driving wheel (431) is meshed with the driven wheel (411). The two clamping rollers (41) are synchronously driven by the motor, so that the workpiece rotates at a uniform speed during the spraying process.

3. The spraying device for pressure-resistant composite air ducts according to claim 2, characterized in that: It also includes a control system. The drive assembly (5) includes a movable robotic arm (51) that moves back and forth along the axial direction of the workpiece. The moving speed of the robotic arm (51) and the rotation speed of the clamping roller (41) are dynamically matched by the control system to ensure that the coating thickness deviation does not exceed 5%. The atomizing nozzle (31) is connected to a high-pressure paint pump (6).

4. The spraying device for pressure-resistant composite air ducts according to claim 3, characterized in that: The atomizing nozzle (31) has a fan-shaped or conical structure, and its spraying angle is adjustable. The spraying pressure range is 0.2MPa to 0.8MPa.

5. The spraying device for pressure-resistant composite air ducts according to claim 1, characterized in that: The top of the spraying chamber (2) is equipped with a negative pressure exhaust fan (8), which is connected to an activated carbon adsorber for treating the volatile organic compounds generated during spraying.

6. The spraying device for pressure-resistant composite air ducts according to claim 3, characterized in that: The control system integrates a PLC module and a touch screen (9) to adjust the rotation speed of the rotary clamping assembly (4), the movement path of the spraying assembly (3), and the spraying parameters.

7. The spraying device for pressure-resistant composite air ducts according to claim 6, characterized in that: The control system has preset spraying modes, including uniform speed spraying mode, segmented thick coating mode and touch-up spraying correction mode, and monitors the coating thickness in real time through sensors.

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