Anti-collision protection device for spray gun of internal coating machine

Abstract

The utility model relates to an anti-collision protection device for a spray gun of an internal coating machine, which comprises a control system, the spray gun and a moving frame for driving the spray gun to be close to a product to be sprayed, a connecting structure for connecting the spray gun on the moving frame in a sliding manner is arranged between the spray gun and the moving frame, and the spray gun is positioned at a preset position on the moving frame in an initial state. The movable frame is further provided with a detection device capable of detecting movement of the spray gun relative to the movable frame, and the movable frame is further provided with a pre-tightening mechanism capable of generating pre-tightening force for preventing the spray gun from moving when the spray gun moves. And the control system is electrically connected with the detection device and sends a signal to the control system when the detection device detects that the spray gun overcomes the pretightening force to move. The displacement change of the spray gun relative to the movable frame is monitored in real time through the detection device, when the spray gun deviates, the detection device immediately sends a signal to the control unit to trigger an emergency stop or reverse movement instruction, damage caused by hard collision is effectively avoided, the response speed is high, and reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment technology, and in particular to an anti-collision protection device for an internal coating machine spray gun. Background Technology

[0002] Spraying equipment has wide applications in industrial production, especially in the field of aluminum can spraying, where the spray gun needs to be precisely moved to the surface of the product to be coated to achieve uniform coating. Traditional internal coating machines usually use a moving frame to move the spray gun closer to the workpiece. However, in actual operation, due to workpiece positioning deviation, mechanical vibration, or program control errors, the spray gun is prone to collision with the workpiece or other parts of the equipment, resulting in wear, deformation, or even damage to the spray gun head, which seriously affects the coating quality and the service life of the equipment.

[0003] In existing technologies, the following solutions are commonly used to prevent spray gun collisions: one is to rigidly block the movement of the spray gun through a mechanical limiting structure, but such structures lack cushioning and are prone to component fatigue or breakage after long-term use; the other is to use sensors to detect the distance between the spray gun and the workpiece and feed it back to the control system to avoid collisions through emergency shutdown. However, such solutions have response delays, especially in high-speed spraying scenarios, where the system may have difficulty stopping the moving frame in time, potentially causing impact damage.

[0004] Therefore, there is an urgent need for an anti-collision device that can detect abnormal displacement of the spray gun in real time, actively trigger protective actions, and has both structural stability and rapid response capability, so as to improve the operational safety and equipment reliability of the spray gun of the internal coating machine.

[0005] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides a collision protection device for the spray gun of an internal coating machine.

[0007] This utility model is achieved through the following technical solution: a collision protection device for an internal coating machine spray gun, including a control system, a spray gun, and a movable frame that moves the spray gun toward the product to be coated. A connecting structure is provided between the spray gun and the movable frame to slide the spray gun onto the movable frame. The spray gun is initially located at a preset position on the movable frame. The movable frame is also provided with a detection device that can detect the movement of the spray gun relative to the movable frame. The movable frame is also provided with a pre-tensioning mechanism that can generate a pre-tensioning force to hinder the movement of the spray gun when it moves. The control system is electrically connected to the detection device and sends a signal to the control system when the detection device detects that the spray gun moves against the pre-tensioning force.

[0008] As a further optimization of this utility model, the detection device includes a pressure switch and a mechanical valve mounted on a movable frame. The mechanical valve is provided with an air inlet for communicating with an air source, an air outlet for communicating with the pressure switch, and an elastic triggering device for controlling the opening and closing of the mechanical valve. The mechanical valve is connected to a movable part that presses against the elastic triggering device to open the mechanical valve when the spray gun is in a preset position, and leaves the elastic triggering device to close the mechanical valve when the spray gun leaves the preset position.

[0009] As a further optimization of this utility model, the movable frame is provided with multiple spray guns, and each spray gun is provided with a connection structure, a detection device and a pre-tightening mechanism between itself and the movable frame.

[0010] As a further optimization of this utility model, each of the detection devices is connected in series, with the air inlet of the foremost mechanical valve used to connect to an air source, and the air outlet of the last mechanical valve used to connect to a pressure switch.

[0011] As a further optimization of this utility model, the connection structure includes a guide rail mounted on a movable frame and a slide block connected to the spray gun and capable of sliding along the guide rail.

[0012] As a further optimization of this utility model, the pre-tightening mechanism includes a cylinder, and the piston rod of the cylinder presses against the rear side of the slide.

[0013] As a further optimization of this utility model, the pre-tightening mechanism includes an elastic pressing member, which presses against the rear side of the slide.

[0014] As a further optimization of this utility model, it also includes a conveyor chain, on which a clamping cup for clamping the product is provided.

[0015] As a further optimization of this utility model, the movable frame is driven by a motor.

[0016] As a further optimization of this utility model, the conveyor chain is driven by a motor.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This device monitors the displacement of the spray gun relative to the moving frame in real time. When the spray gun shifts due to abnormal collision or resistance overcoming the preload, the detection device immediately sends a signal to the control unit to trigger an emergency stop or reverse movement command, effectively avoiding damage caused by hard collisions. It has a fast response speed and high reliability.

[0019] 2. The pre-tightening mechanism provides stable pre-tightening resistance during normal spray gun movement, ensuring accurate positioning of the spray gun; when the spray gun is subjected to external impact, the pre-tightening force can buffer some of the impact energy, while allowing the spray gun to slide within a preset range, avoiding damage to the mechanical structure due to rigid collision, and extending the service life of the spray gun and the moving frame.

[0020] 3. Through the coordinated design of "mechanical pre-tensioning buffer + electronic control rapid response", the impact force at the moment of collision is reduced, and the risky action is actively cut off by the electronic control system, forming a double protection barrier and significantly improving the safety of the equipment.

[0021] 4. The connection structure adopts a sliding guide design, which simplifies the mechanical layout while ensuring the accuracy of the spray gun movement. The detection device and pre-tightening mechanism are integrated into the moving frame, requiring no additional space. The modular design facilitates quick inspection or replacement, reducing maintenance costs. The preset initial position of the spray gun and the adjustable pre-tightening force parameters can be flexibly adjusted according to different spraying scenarios to avoid accidental triggering or protection failure, balancing the needs of efficient production and safety protection. Attached Figure Description

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0025] Figure 3 This is a schematic diagram illustrating the principle of preventing damage to the spray gun upon collision in this utility model.

[0026] Figure 4 This is a schematic diagram of the structure of a single spray gun mounted on a movable frame in this utility model;

[0027] Figure 5 This is a schematic diagram of the mechanical valve in this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of multiple mechanical valves connected in series via air pipes in this utility model. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1 to 6The diagram illustrates an anti-collision protection device for an internal coating machine spray gun, comprising a control system, a spray gun 1, and a movable frame 2 that moves the spray gun 1 toward the product to be coated. A connecting structure 3 slidably connects the spray gun 1 to the movable frame 2. Initially, the spray gun 1 is positioned at a preset position on the movable frame 2. The movable frame 2 also includes a detection device 4 capable of detecting the movement of the spray gun 1 relative to the frame 2. Furthermore, the movable frame 2 is equipped with a pre-tensioning mechanism 5 that generates a pre-tensioning force to resist the movement of the spray gun 1. The control system is electrically connected to the detection device 4, and sends a signal to the control system when the detection device 4 detects that the spray gun 1 has moved against the pre-tensioning force. The control system can be an electrical control cabinet, a PLC control system, or a computer terminal.

[0031] This project integrates a sliding guide structure with a modular detection device, employing a collaborative mechanism of "mechanical pre-tensioning buffer + electronic control rapid response": real-time monitoring of the displacement change of the spray gun 1 relative to the moving frame 2; in the event of an abnormal collision, the pre-tensioning mechanism buffers the impact energy and allows controllable sliding; simultaneously triggering the detection device 4 to send a signal to the control system; the control system then issues an emergency stop / reverse movement command, forming dual protection; its compact design balances movement accuracy and impact resistance requirements; adjustable pre-tensioning parameters adapt to different working conditions; and it achieves rapid inspection and maintenance while avoiding rigid damage, significantly improving equipment safety and service life.

[0032] In one embodiment, the detection device 4 includes a pressure switch 41 and a mechanical valve 42 mounted on the movable frame 2. The mechanical valve 42 has an air inlet 421 for communication with an air source, an air outlet 422 for communication with the pressure switch 41, and an elastic triggering device 423 for controlling the opening and closing of the mechanical valve 42. The mechanical valve 42 is connected to a movable part 424 that presses against the elastic triggering device 423 to open the mechanical valve 42 when the spray gun 1 is in a preset position, and disengages from the elastic triggering device 423 to close the mechanical valve 42 when the spray gun 1 leaves the preset position. When the spray gun 1 hits an object, the object exerts a reverse force on the spray gun 1, thereby pushing the spray gun 1 away from the preset position. At this time, the movable part 424 disengages from the spray gun 1, releasing the pressure on the elastic triggering device 423, thereby causing the valve core of the mechanical valve 42 to actuate and cut off the air intake of the mechanical valve 42. This causes the pressure switch 41 to detect the change in air pressure and send a signal to the control system. The control system then issues an emergency stop / reverse movement command to prevent the spray gun 1 from continuing to move towards the workpiece and being damaged.

[0033] In one embodiment, the mechanical valve 42 may be a two-position three-way mechanical valve 42, which may be a FESTO mechanical valve 42 with model number V / O-3-1 / 8 4938. Of course, it may also be other mechanical valves 42.

[0034] In one embodiment, the movable frame 2 is equipped with multiple spray guns 1, and each spray gun 1 is connected to the movable frame 2 by a connecting structure 3, a detection device 4, and a pre-tightening mechanism 5. This allows multiple products to be sprayed simultaneously, improving processing efficiency.

[0035] Furthermore, each of the aforementioned detection devices 4 is connected in series. The air inlet 421 of the foremost mechanical valve 42 is used to connect to an air source, and the air outlet 422 of the rearmost mechanical valve 42 is used to connect to a pressure switch 41. Thus, when one of the spray guns 1 is impacted, the air supply is cut off, causing a change in the air pressure detected by the pressure switch 41, thereby sending a signal to the control system. The control system then issues an emergency stop / reverse movement command.

[0036] In one embodiment, the connecting structure 3 includes a guide rail 31 mounted on the movable frame 2 and a slide block 32 connected to the spray gun 1 and capable of sliding along the guide rail 31. The guide rail 31 can be connected to the movable frame 2 by threaded fasteners, or by welding or other connection methods. The spray gun 1 can be connected to the slide block 32 by threaded fasteners, or by welding or other connection methods.

[0037] In one embodiment, the movable frame 2 or guide rail 31 is provided with a limiting block or limiting member that cooperates with the pre-tightening mechanism 5 to keep the spray gun 1 in a preset position.

[0038] In one embodiment, the pre-tensioning mechanism 5 may be a cylinder 51, with the piston rod of the cylinder 51 pressing against the rear side of the slide 32. Alternatively, the pre-tensioning mechanism 5 may be an elastic pressing member, pressing against the rear side of the slide 32. The elastic pressing member may be a spring or other elastic element.

[0039] In one embodiment, the anti-collision protection device for the spray gun of the internal coating machine further includes a conveyor chain 6, on which a clamping cup 61 for clamping the product is provided. The conveyor chain 6 and clamping cup 61 are the conventional conveyor chain 6 and clamping cup 61 found on bottle conveying devices on the market, and will not be described in detail here.

[0040] In one embodiment, both the movable frame 2 and the conveyor chain 6 are driven by a motor. The transmission is achieved through a belt drive assembly, a gear drive assembly, or a sprocket drive assembly.

Claims

1. A collision protection device for an internal coating machine spray gun, characterized in that: The system includes a control system, a spray gun (1), and a moving frame (2) that moves the spray gun (1) toward the product to be sprayed. A connecting structure (3) is provided between the spray gun (1) and the moving frame (2) to slide the spray gun (1) onto the moving frame (2). The spray gun (1) is initially located at a preset position on the moving frame (2). The moving frame (2) is also provided with a detection device (4) that can detect the movement of the spray gun (1) relative to the moving frame (2). The moving frame (2) is also provided with a pre-tensioning mechanism (5) that can generate a pre-tensioning force that hinders the movement of the spray gun (1) when it moves. The control system is electrically connected to the detection device (4) and sends a signal to the control system when the detection device (4) detects that the spray gun (1) moves against the pre-tensioning force.

2. The anti-collision protection device for an internal coating machine spray gun according to claim 1, characterized in that: The detection device (4) includes a pressure switch (41) and a mechanical valve (42) mounted on the movable frame (2). The mechanical valve (42) is provided with an air inlet (421) for communicating with an air source, an air outlet (422) for communicating with the pressure switch (41), and an elastic triggering device (423) for controlling the opening and closing of the mechanical valve (42). The mechanical valve (42) is connected to a movable part (424) that presses against the elastic triggering device (423) when the spray gun (1) is in a preset position, causing the mechanical valve (42) to open, and leaves the elastic triggering device (423) when the spray gun (1) leaves the preset position, causing the mechanical valve (42) to close.

3. The anti-collision protection device for an internal coating machine spray gun according to claim 2, characterized in that: The movable frame (2) is equipped with multiple spray guns (1), and each spray gun (1) is connected to the movable frame (2) by a connecting structure (3), a detection device (4), and a pre-tightening mechanism (5).

4. The anti-collision protection device for an internal coating machine spray gun according to claim 3, characterized in that: Each of the detection devices (4) is connected in series. The air inlet (421) of the frontmost mechanical valve (42) is used to connect to the air source, and the air outlet (422) of the rearmost mechanical valve (42) is used to connect to the pressure switch (41).

5. A collision protection device for an internal coating machine spray gun according to any one of claims 1-4, characterized in that: The connection structure (3) includes a guide rail (31) mounted on the movable frame (2) and a slide (32) connected to the spray gun (1) and capable of sliding along the guide rail (31).

6. The anti-collision protection device for an internal coating machine spray gun according to claim 5, characterized in that: The pre-tightening mechanism (5) includes a cylinder (51), the piston rod of which presses against the rear side of the slide (32).

7. The anti-collision protection device for an internal coating machine spray gun according to claim 5, characterized in that: The pre-tightening mechanism (5) includes an elastic pressing member that presses against the rear side of the slide (32).

8. The anti-collision protection device for an internal coating machine spray gun according to claim 1, characterized in that: It also includes a conveyor chain (6) on which clamping cups (61) for clamping products are provided.

9. The anti-collision protection device for an internal coating machine spray gun according to claim 1, characterized in that: The mobile frame (2) is driven by a motor.

10. The anti-collision protection device for an internal coating machine spray gun according to claim 8, characterized in that: The conveyor chain (6) is driven by a motor.

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