Automatic spraying device for pipes

Abstract

The invention relates to an automatic spraying device for pipes. The automatic spraying device comprises a feeding unit, a spraying unit, a drying unit and a conveying unit which are connected in sequence. The spraying unit comprises a conveying platform, a spraying space is arranged in the middle of the conveying platform, nozzles which are symmetrically arranged up and down are arranged in the spraying space, and a spraying exhaust pipeline covers the spraying space; the conveying unit is provided with a plurality of supporting pieces of T-shaped structures, the tips of the T-shaped structures are arranged upwards so that the contact faces between the supporting pieces and the sprayed material can be reduced, the situation that the spraying faces are damaged is avoided, and the product quality is improved. The distance between the upper spray head and a sprayed material and the distance between the lower spray head and the sprayed material are adjusted through the lifting rod, a workpiece can be adjusted to the spraying designated height, the spraying precision is improved, meanwhile, whole-process automatic operation and adjustment of feeding, spraying, drying and discharging are achieved through the automatic spraying device, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of equipment and parts spraying, specifically to an automatic spraying device for pipes, and more particularly to an automatic spraying device for pipes, flanges and other products. Background Technology

[0002] Currently, the pipe coating process directly affects the product's appearance and corrosion resistance, with each step of the process interconnected. The topcoat application determines the final result; if automatic spraying is used, excessively fast spray gun movement can produce an orange peel texture and result in an overly thin paint. If manual spraying is used, coating thickness is difficult to control, relying heavily on worker skill; furthermore, the working environment is extremely poor, labor intensity is high, seriously impacting worker health and resulting in low production efficiency.

[0003] Therefore, there is an urgent need for a device that can improve the quality of spraying, while also improving the working environment and increasing production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an improved automatic spraying device for pipes, which improves spraying quality and increases spraying efficiency through structural improvements.

[0005] To achieve the above objectives, the technical solution of the present invention is: an automatic spraying device for pipes, characterized in that: the automatic spraying device includes a feeding unit, a spraying unit, a drying unit and a conveying unit connected in sequence; the spraying unit includes a conveying platform, a spraying space is provided in the middle of the conveying platform, the spraying space is provided with spray nozzles symmetrically arranged above and below, and the outside of the spraying space is covered with a spraying exhaust pipe; the conveying unit is provided with a plurality of T-shaped support members.

[0006] Preferably, the conveying unit is provided with a column, and a conveyor belt is provided on the column. The conveyor belt is driven by a drive motor. The conveyor belt is provided with several evenly distributed T-shaped structure support members. The tips of the T-shaped structures are set upward to reduce the contact area between the support members and the material to be sprayed. The bottom of the T-shaped structures is connected to the conveying rod through a connector. The spacing between the connected support members is the same.

[0007] Furthermore, the spraying unit is equipped with several sensors to detect the width of the material being sprayed; the upper and lower nozzles are mounted on the spraying trolley, and the spraying can move up and down along the steel rail to adjust the distance between the upper and lower nozzles and the material being sprayed.

[0008] Furthermore, four sets of laser displacement sensors are installed, symmetrically arranged on both sides of the upper and lower nozzles.

[0009] Furthermore, the feeding unit includes a feeding belt and a corresponding conveying device.

[0010] Furthermore, the drying unit is equipped with a VOCs gas treatment unit and a blowing device. The drying unit is covered with heat insulation panels to guide the hot air blown out by the blowing device to the surface of the workpiece. The VOCs gas treatment unit is connected to an exhaust pipe. The exhaust pipe is connected to an adsorption unit, which includes a negative pressure exhaust device and an activated carbon adsorption tower connected to it. The VOCs gas treatment unit is equipped with a negative pressure spraying chamber, which contains a conical guide channel and a corresponding filtration and circulation system.

[0011] Compared with the prior art, the technical solution of the present invention not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects: 1. The improved solution of the present invention, wherein the automatic spraying device includes a feeding unit, a spraying unit, a drying unit and a conveying unit connected in sequence; the spraying unit includes a conveying platform, a spraying space is provided in the middle of the conveying platform, and the spraying space is provided with spray nozzles symmetrically arranged at the top and bottom, the top and bottom spray nozzles are respectively connected to a lifting rod, and the distance between the top and bottom spray nozzles and the material to be sprayed is adjusted by the lifting rod, so that the workpiece can be adjusted to the specified spraying height, improving the spraying accuracy. At the same time, the automatic spraying device realizes the fully automatic operation and adjustment of feeding, spraying, drying and discharging, thereby improving production efficiency; 2. In the technical solution of the present invention, the conveyor belt is provided with a number of evenly distributed T-shaped structure support members, and the tip of the T-shaped structure is set upward to reduce the contact area between the support member and the material to be sprayed, so as to avoid damage to the sprayed surface and improve the quality of the product. 3. In the structure of the present invention, the spraying unit is equipped with several sensors to detect the width of the material to be sprayed, ensuring the accurate setting of the spraying points, ensuring paint consumption, and avoiding overspraying. 4. The present invention has a reasonable structural layout and the components work together in a coordinated manner, which improves work efficiency and facilitates promotion and use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of the feeding unit of the present invention.

[0015] Figure 4 This is another structural schematic diagram of the feeding unit of the present invention.

[0016] Figure 5 This is a partial structural schematic diagram of the spraying unit of the present invention.

[0017] Figure 6 This is a partial structural schematic diagram of the VOCs gas treatment unit of the present invention.

[0018] Figure 7 This is another partial structural schematic diagram of the VOCs gas treatment unit of the present invention.

[0019] Figure label: 1 Conveying unit, 2 Spraying unit, 3 Drying unit, 4 VOCs gas treatment unit, 5 Pipe self-adaptive mechanism, 6 Pipe, 7 T-shaped structural support, 8 Drive motor, 9 Column, 10 Foundation; 11 Feeding unit, 12 Spraying carriage, 13 Exhaust pipe, 14 Exhaust valve, 15 Negative pressure spraying chamber, 16 Adsorption unit, 17 Connector, 18 Laser displacement sensor, 20 Spray head. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides an automatic spraying device for pipes, see details below. Figure 1 The difference between this and existing technologies is that the automatic spraying device includes a feeding unit 11, a spraying unit 2, a drying unit 3, and a conveying unit 1 connected in sequence; the spraying unit includes a conveying platform, with a spraying space in the middle of the conveying platform, and spraying nozzles 6 symmetrically arranged at the top and bottom of the spraying space. The upper and lower nozzles can be adjusted to lift and lower, so as to perform more precise spraying operations on the pipe 6. The outer cover of the spraying space is equipped with a spraying exhaust pipe to prevent excess paint particles from dispersing in the air during the spraying operation, condensing or falling, and affecting subsequent spraying operations; the conveying unit is equipped with several T-shaped support members 8.

[0022] In practice, the pipes sequentially enter the feeding unit, spraying unit, drying unit, and conveying unit, enabling fully automated operation and adjustment of the feeding, spraying, drying, and discharging processes, thus improving work efficiency. The feeding unit is equipped with a pipe self-adaptive mechanism 5, see details below. Figure 3 It solves the pain point of traditional devices requiring "one tool per pipe". Through the pipe self-adaptive mechanism 5, it can adapt to pipes with diameters of φ10-φ1000mm and lengths of 4-14m without replacing any parts.

[0023] Meanwhile, the conveyor belt is equipped with several evenly distributed T-shaped support members. The tips of the T-shaped structures are set upwards to reduce the contact area between the support members and the material being sprayed, thereby preventing damage to the sprayed surface and improving product quality.

[0024] Example 1 This embodiment describes an automatic spraying device for pipes, see details below. Figure 1 The automatic spraying device includes a feeding unit 11, a spraying unit 2, a drying unit 3, and a conveying unit 1 connected in sequence. The spraying unit includes a conveying platform with a spraying space in the middle. The spraying space is equipped with spray nozzles 20 arranged symmetrically at the top and bottom. The upper and lower spray nozzles can be adjusted to allow for more precise spraying of the pipes. The spraying space is covered with a spraying exhaust pipe to prevent excess paint particles from dispersing in the air, condensing, or falling off during spraying, which could affect subsequent spraying operations. The conveying unit is equipped with several T-shaped support members 8.

[0025] Specifically, the conveying unit has a column 9 with a conveyor belt on it. The conveyor belt is driven by a drive motor 7. The conveyor belt has several evenly distributed T-shaped support members 7. The tip of the T-shaped structure (i.e., the vertical structure) is set upward to reduce the contact area between the support member and the material to be sprayed, thus avoiding damage to the sprayed surface and improving product quality. The bottom of the T-shaped structure (i.e., the horizontal position) is connected to the conveyor rod through a connector 17. The connector 17 is square in shape, wrapping the bottom of the T-shaped structure and connecting them into one piece. The bottom of the connector has a slot that fits precisely on the conveyor rod. The spacing between the connected support members is the same to ensure that the supporting force on the pipe is evenly distributed.

[0026] Furthermore, the spraying unit is equipped with several laser displacement sensors to detect the width of the material being sprayed; the upper and lower nozzles are mounted on a spraying trolley, and the spraying can move up and down along the steel rails to adjust the distance between the upper and lower nozzles and the material being sprayed. Four sets of laser displacement sensors are symmetrically arranged on both sides of the upper and lower nozzles.

[0027] Furthermore, the drying unit is equipped with a VOCs gas treatment unit 4 and a blowing device. The drying unit is covered with heat insulation plates to guide the hot air blown out by the blowing device to the surface of the workpiece. The VOCs gas treatment unit is connected to an exhaust pipe. The exhaust pipe is connected to an adsorption unit, which includes a negative pressure exhaust device and an activated carbon adsorption tower connected thereto. The VOCs gas treatment unit is equipped with a negative pressure spraying chamber, which contains a conical guide channel and a matching filtration and circulation system.

[0028] Example 2 This embodiment describes an automatic spraying device for pipes, see details below. Figure 1 The automatic spraying device includes a feeding unit 11, a spraying unit 2, a drying unit 3, and a conveying unit 1 connected in sequence. The spraying unit includes a conveying platform with a spraying space in the middle. The spraying space is equipped with spray nozzles 6 arranged symmetrically at the top and bottom. The upper and lower spray nozzles can be adjusted to allow for more precise spraying of the pipes. The spraying space is covered with a spraying exhaust pipe to prevent excess paint particles from dispersing in the air, condensing, or falling off during spraying, which could affect subsequent spraying operations. The conveying unit is equipped with several T-shaped support members 8.

[0029] Specifically, the feeding unit 11 is described in detail below. Figure 4 This solves the problem that traditional clamps are prone to creating blind spots in the paint spraying process or damaging the already painted surface. By using several T-shaped structure 7 support members for pipe conveying, the contact area with the pipe can be minimized, avoiding scratches on the sprayed paint.

[0030] The automatic spraying device for pipes of the present invention is described in detail below. Figure 5 The system automatically matches the optimal spraying parameters without requiring manual adjustment based on pipe specifications and surface condition. Equipped with a laser displacement sensor 18, it detects the distance to the pipe surface in real time. Combined with a vision recognition module, it captures blind spots in the spraying process. A PLC controller dynamically adjusts the nozzle movement speed (0.5-3 m / min), paint spraying pressure (0.3-0.8 MPa), and atomized particle size to ensure a coating thickness error of ≤ ±0.02 mm, improving coating uniformity. The entire spraying system consists of two spraying units 2, each containing four symmetrically arranged nozzles 20. The spraying units are mounted on a chain-driven heavy-duty spraying trolley 12, running on steel rails. The lower unit automatically positions itself on the pre-prepared path of the pipe, while the upper unit, equipped with a vertical distance setting system connected to a sensor system for detecting the workpiece's outer contour, automatically moves to the set spraying height above the pipe's spraying surface. A second sensor system is mounted on the movable upper spraying unit's main arm to detect the material width and simultaneously control the start and stop of the spraying process. By using two sets of sensor systems in conjunction, the system identifies the outline of the tube, ensuring the precise location of the atomizing gun head's start and stop points.

[0031] Furthermore, the laser ranging sensing module employs four sets of high-precision laser displacement sensors 18 (detection accuracy 0.005mm, response frequency 100Hz), symmetrically arranged on both sides of the nozzle assembly (two sets at the front and two at the back), to collect real-time distance data between the pipe surface and the nozzle, dynamically monitor pipe roundness deviation and surface defects (such as welds and scratches), with a data sampling interval ≤10ms to ensure real-time detection.

[0032] Furthermore, the visual recognition and positioning module is equipped with two industrial CCD cameras (2048×1536 resolution, 30fps frame rate) and a ring LED light source to capture images of the sprayed area from both radial and axial perspectives of the pipe. Through a deep learning algorithm (based on YOLOv8 model training), it accurately identifies spraying blind spots (such as pipe ends, joints, and weld positions) and coating defects such as missed spraying and sagging, with an accuracy rate of ≥99.2%.

[0033] Furthermore, the nozzle unit mechanism adopts a linear module + servo motor drive (positioning accuracy 0.01mm) to achieve dual-dimensional linkage adjustment of the nozzle along the pipe axis and radial direction; the axial movement speed is linked with the pipe feed speed (0.5-3m / min steplessly adjustable), and the radial movement is dynamically fine-tuned according to laser ranging data (adjustment range ±5mm) to ensure that the distance between the nozzle and the pipe surface is constant (set distance 50±2mm).

[0034] This invention provides an automatic spraying device for pipes, which differs from existing technologies in that: the VOCs gas treatment unit shown solves the problem of traditional spraying requiring the construction of a painting booth and large VOCs gas treatment equipment; the treatment unit adopts a high-efficiency paint recovery and environmentally friendly design: it uses a negative pressure spraying chamber 15, combined with a conical guide channel and a filtration circulation system, to recover unattached atomized paint (recovery rate ≥92%), and integrates an activated carbon adsorption device to treat VOCs gas, solving the problems of paint waste and environmental pollution.

[0035] Exhaust pipes 13 are installed throughout the spraying and drying areas, drawing in paint dust from two inner sides of the equipment compartment via paint dust pre-separators. These pre-filters act as a primary filtration system, capturing larger paint particles. Smaller particles are then blown through pipes to the paint dust filters and trapped. The pre-filters feature a plug-in design for easy removal, cleaning, and installation.

[0036] In adsorption unit 16, the outlet of the negative pressure exhaust device is connected to the activated carbon adsorption tower (tower volume 1.2m³). 3 Filled with honeycomb activated carbon, with a specific surface area ≥1000 m² 2 / g), VOCs volatilized in atomized coatings (such as toluene and xylene in solvent-based coatings) enter the adsorption tower with the airflow and are efficiently adsorbed by activated carbon (adsorption efficiency ≥95%). The adsorption tower is equipped with a differential pressure monitor. When the differential pressure exceeds 8 kPa, it indicates that the activated carbon needs to be replaced or regenerated.

[0037] Deep purification: For coatings with high VOC content (such as epoxy zinc-rich primer), a photocatalytic oxidation device (using UV photolysis lamps, wavelength 185-254nm, processing air volume 2000m³) is added after the activated carbon adsorption tower. 3The system oxidizes and decomposes trace amounts of VOCs that are not fully adsorbed, converting them into harmless CO2 and H2O, thereby further reducing the content of pollutants in the exhaust gas.

[0038] Example 3 In this embodiment, the described automatic spraying device includes a feeding unit, a spraying unit, a drying unit, and a conveying unit connected in sequence. The spraying unit includes a conveying platform with a spraying space in the middle. The spraying space is equipped with spray nozzles symmetrically arranged at the top and bottom. The upper and lower spray nozzles can be adjusted to lift and lower to perform more precise spraying operations on the pipes. The spraying space is covered with a spraying exhaust pipe. The conveying unit is equipped with several T-shaped support members.

[0039] Specifically, the spraying unit is equipped with several sensors to detect the material width and control the start and stop of spraying. Through the sensor system, the system identifies the contour, ensuring precise setting of the atomizing gun's start and stop points. This ensures adequate paint consumption while preventing overspray.

[0040] The drying unit is equipped with heat insulation panels to guide the hot air blown out by the blower to the surface of the workpiece, while avoiding heat loss. Temperature sensors are also installed to control the hot air within an ideal range.

[0041] The specific advantages of this invention are as follows: 1. The conveying unit can adjust the workpiece to the specified spraying height through sensors and a vertical distance setting system, ensuring that the spray head is within the optimal spraying range.

[0042] 2. The conveying unit adopts a T-shaped structure to ensure minimal contact with the workpiece while conveying it, thus avoiding damage to the coating surface.

[0043] 3. The spraying unit uses sensors to detect the material width and simultaneously control the start and stop of the spraying surface. Through the sensor system, the system identifies the contour, ensuring precise setting of the atomizing gun's start and stop points. This ensures adequate paint consumption while preventing overspray.

[0044] 4. The drying unit uses a heat insulation plate, which has low heat loss, and delivers hot air to the workpiece; through circulating air and sensors, the temperature is controlled within an ideal range, and the paint on the workpiece surface is quickly cured to meet the product coating requirements.

[0045] 5. The VOCs gas treatment unit can draw in clean air, blow it into the workpiece, and discharge the gas containing paint particles. After passing through the gas treatment module, the gas that meets the standards is discharged, thus satisfying the requirements of environmental protection.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An automatic spraying device for pipes, characterized in that: The automatic spraying device includes a feeding unit, a spraying unit, a drying unit, and a conveying unit connected in sequence; the spraying unit includes a conveying platform, a spraying space in the middle of the conveying platform, spraying nozzles symmetrically arranged at the top and bottom of the spraying space, and a spraying exhaust pipe covering the outside of the spraying space; the conveying unit is provided with several T-shaped support components.

2. The automatic spraying device for pipes according to claim 1, characterized in that: The conveying unit is equipped with a column, on which a conveyor belt is mounted. The conveyor belt is driven by a drive motor and has several evenly distributed T-shaped support members. The tips of the T-shaped structures are set upwards to reduce the contact area between the support members and the material being sprayed. The bottom of the T-shaped structures is connected to the conveying rod through connectors, and the spacing between the connected support members is the same.

3. The automatic spraying device for pipes according to claim 1, characterized in that: The spraying unit is equipped with several laser displacement sensors to detect the width of the material to be sprayed; the upper and lower nozzles are set on the spraying trolley, and the spraying can move up and down along the steel rail to adjust the distance between the upper and lower nozzles and the material to be sprayed.

4. An automatic spraying device for pipes according to claim 3, characterized in that: Four sets of laser displacement sensors are installed, symmetrically arranged on both sides of the upper and lower nozzles.

5. An automatic spraying device for pipes according to claim 1, characterized in that: The feeding unit includes a feed belt and a corresponding conveyor.

6. An automatic spraying device for pipes according to claim 1, characterized in that: The drying unit is equipped with a VOCs gas treatment unit and a blowing device. The drying unit is covered with heat insulation plates to guide the hot air blown out by the blowing device to the surface of the workpiece. The VOCs gas treatment unit is connected to the exhaust pipe. The exhaust pipe is connected to the adsorption unit, which includes a negative pressure exhaust device and an activated carbon adsorption tower connected thereto.

7. An automatic spraying device for pipes according to claim 6, characterized in that: The VOCs gas treatment unit is equipped with a negative pressure spraying chamber, which contains a conical guide channel and a matching filtration and circulation system.

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