Annular transfer coating system for u-shaped lamp coating machine

Abstract

The present application belongs to the technical field of energy-saving lamp tube processing, and discloses an annular conveying and coating system for a U-shaped lamp tube coating machine, which comprises an annular clamping conveying mechanism for conveying the U-shaped lamp tube and a coating assembly for coating the inner wall of the lamp tube with a coating solution; the annular clamping conveying mechanism comprises a work station clamp; a turnover work station is arranged behind the upper tube work station and in front of the lower tube work station; the work station clamp is capable of being turned over by 180 degrees at the turnover work station through a first push rod, a first stop pin, a second push rod and a second stop pin cooperation structure; the coating assembly comprises a injection and suction assembly; the injection and suction assembly comprises injection pipes and suction pipes arranged side by side; the injection pipes and the suction pipes are lifted along with an injection and suction lifting seat, and injection and suction are completed through a connected injection pump and a suction pump. The upper tube device and the injection and suction mechanism of the present application are more compact in structure; the injection and suction assembly is high in coating precision; and the lamp tube is low in falling probability during conveying.

Description

Technical Field

[0001] This invention belongs to the field of energy-saving lamp processing technology, and relates to coating technology for energy-saving lamp tubes, and particularly to a coating equipment for U-shaped energy-saving lamp tubes. Background Technology

[0002] In the production process of energy-saving lamp tubes, coating the inner wall of the glass tube with a layer of aluminum oxide or titanium dioxide protective film before applying phosphor can effectively prevent mercury from reacting with sodium in the tube, reducing mercury consumption and better adhering to the phosphor. Since the tube opening of the energy-saving lamp tube needs to be welded and sealed in subsequent processing, the section of the inner wall near the opening must not be coated with a film; otherwise, the opening will not be able to be sealed properly due to the isolation effect of the protective film.

[0003] Patent CN103903936A discloses an energy-saving lamp tube coating machine that can automate the coating process on the inner wall of energy-saving lamp tubes. However, its drawbacks are: 1. During operation, the tube clamp of the upper tube device undergoes significant flipping and sudden stopping movements, which can easily cause the lamp tube to fall off due to vibration (the lamp tube cannot be clamped too tightly, otherwise it may break); 2. During the liquid injection process, the film liquid impacts the liquid surface inside the lamp tube, causing water splashes. On the one hand, some droplets will uncontrollably splash onto the tube wall, and droplets splashing onto the part of the tube opening where coating is prohibited will cause occasional air leakage in the subsequent sealing process. On the other hand, due to the impact of the film liquid, the liquid surface inside the lamp tube will fluctuate significantly, resulting in a severely uneven transition section of the tube wall between the coated tube wall and the uncoated tube opening. Some parts of this transition section of the tube wall are coated with a protective film, while others are not. If the transition section of the tube wall is used as part of the tube opening that needs to be sealed, it will cause occasional air leakage in the subsequent sealing process. If the transition section of the tube wall is used as part of the light-transmitting tube body of the lamp, the area near the tube opening of the energy-saving lamp is prone to blackening during use. 3. The ring conveyor mechanism is equipped with one liquid injection mechanism and two liquid extraction mechanisms, making the equipment complex; multiple devices are powered by cylinders, and without electronic detection and control, continuous cumulative deviations will occur after long-term operation, resulting in poor synchronization of actions. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects and provide an improved conveying coating system suitable for U-shaped lamp tube coating machines.

[0005] To achieve the above objectives, the technical solution adopted by this invention is: a ring-shaped conveying coating system for a U-shaped lamp tube coating machine, comprising a ring-shaped clamping and conveying mechanism for conveying U-shaped lamp tubes and a coating assembly for applying a film liquid to the inner wall of the lamp tube; the ring-shaped clamping and conveying mechanism includes a ring-shaped conveying chain mechanism and multiple station clamps for clamping U-shaped lamp tubes evenly arranged on the conveying chain of the ring-shaped conveying chain mechanism; the coating assembly includes a liquid storage tank, an injection pump, a suction pump, and an injection / suction assembly. The inlet end of the injection pump is connected to the liquid storage tank via a hose, and the outlet end of the suction pump is connected to the liquid storage tank via a hose.

[0006] The feature is that the workstation clamp is rotatably mounted on a workstation clamp mounting base via a rotating shaft. The workstation clamp mounting base is fixed to the conveyor chain. The rotating shaft is provided with a pair of flat grooves, and the workstation clamp mounting base is provided with a pair of spring plates. The pair of spring plates elastically press against the pair of flat grooves on the rotating shaft. A first push rod and a second push rod are respectively provided above and below the workstation clamp. At the flipping workstation, a first stop pin fixed relative to the frame for blocking the first push rod and a second stop pin for blocking the second push rod are provided.

[0007] The aforementioned structure, through the cooperation of the push rod and stop pin, and the flat groove and spring plate, enables the workstation clamp to automatically complete a 180-degree rotation when passing through the flipping station, thereby changing the orientation of the lamp tube opening on the workstation clamp. This translation method has at least the following advantages: 1. The rotation is achieved by the workstation clamp rotating along the shaft, and the lamp tube does not swing significantly during the process; 2. The cooperation structure of the flat groove and spring plate enables the latter half of the workstation clamp's rotation and limits the rotation angle. The elasticity of the spring plate not only makes the rotation process gentle, but also allows the workstation clamp to exceed 180 degrees due to inertia during rotation, and then return to 180 degrees, making the stopping process of the rotation action gentle. Not only does it achieve the rotation of the lamp tube with four simple parts, but more importantly, it effectively prevents the lamp tube from falling off due to vibration.

[0008] The injection and suction assembly includes an injection tube and a suction tube arranged side by side, an injection and suction lifting seat for fixing the injection and suction tubes, and an injection and suction assembly mounting plate for mounting the injection and suction lifting seat. The injection and suction lifting seat is vertically and flexibly mounted on the injection and suction assembly mounting plate via a vertical guide rail mechanism, and the injection and suction assembly mounting plate is fixed to the frame. The distance between the injection tube and the suction tube is equal to the distance between the two straight tubes of the U-shaped lamp tube. The upper end of the injection tube is directly or indirectly connected to the outlet end of the injection pump, and the upper end of the suction tube is directly or indirectly connected to the inlet end of the suction pump. The lower end of the suction tube is connected to a section of flexible rubber tubing.

[0009] In the injection and aspiration assembly of this invention, the injection tube and the aspiration tube rise and fall synchronously with the injection and aspiration lifting seat. When injection is required, the injection tube and the aspiration tube are inserted downwards into the two openings of the U-shaped lamp tube respectively. During injection, the liquid level in the tubes submerges the lower opening of the injection tube, and the liquid level rises steadily until the required injection volume is reached. Then, the aspiration pump is started to draw the membrane solution back. Throughout the entire process, except before the liquid level in the tubes submerges the lower opening of the injection tube, no membrane solution splashing or violent fluctuations in the liquid level occur. Furthermore, after the complete injection and aspiration process, the lamp tube is only conveyed backwards after the injection and aspiration assembly has risen. This overcomes the problem in the prior art where the swaying of the liquid surface during the transmission of the membrane solution in the lamp tube causes the membrane solution to adhere to the tube wall where no coating is desired.

[0010] Furthermore, the injection lifting seat is hinged to the upper end of an injection assembly connecting rod, and the lower end of the injection assembly connecting rod is hinged to the swing end of an injection drive swing rod. The injection drive swing rod is a single-arm swing rod, with the swing axis located at the other end of the swing rod. The middle part of the swing rod presses against an injection drive cam, which is mounted on a main shaft driven to rotate by a motor. The injection drive cam drives the injection drive swing rod to swing, and the injection drive swing rod drives the injection lifting seat to rise and fall through the injection assembly connecting rod.

[0011] As an improvement, the coating assembly further includes a secondary suction component, which suctions a small amount of residual film liquid that slowly flows down from the tube arm after coating by the injection component. The secondary suction component includes a suction tube, a suction lifting seat for fixing the suction tube, and a suction component mounting plate for mounting the suction lifting seat. The suction lifting seat is vertically and flexibly mounted on the suction component mounting plate via a vertical guide rail mechanism, and the suction component mounting plate is fixed to the frame. The upper end of the suction tube is directly or indirectly connected to the inlet end of the suction pump, and the lower end of the suction tube is connected to a section of flexible rubber tubing.

[0012] Furthermore, the suction lifting seat is hinged to the upper end of a suction assembly connecting rod, and the lower end of the suction assembly connecting rod is hinged to the swing end of a suction drive swing rod. The suction drive swing rod is a single-arm swing rod, with the swing axis located at the other end of the swing rod. The middle part of the swing rod presses against a suction drive cam, which is mounted on a main shaft driven to rotate by a motor. The suction drive cam drives the suction drive swing rod to swing, and the suction drive swing rod drives the suction lifting seat to rise and fall through the suction assembly connecting rod.

[0013] As an improvement, the coating assembly further includes a pressing device, which comprises a slide bar seat horizontally mounted on the frame and a horizontal slide bar slidably mounted on the slide bar seat. A rubber pressing block is fixed to one end of the horizontal slide bar near the station clamp, and the other end is hinged to a pressing device connecting rod providing linear drive. This pressing device presses down on the lamp tube during liquid injection, preventing the lamp tube from detaching from the station clamp under the impact of the liquid during injection.

[0014] The beneficial effects of this invention are: compared with similar inventions previously disclosed, the liquid injection and extraction mechanism has a more streamlined structure and lower maintenance costs; the coating precision of the newly proposed injection and extraction component is greatly improved; the flipping of the lamp tube before liquid injection is naturally completed by the transmission action of the transmission system, without the need for a special flipping mechanism, and the flipping action is smaller, thus resulting in a lower lamp tube detachment rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a U-shaped lamp tube coating machine using the annular conveyor coating system described in this invention.

[0016] Figure 2 for Figure 1 The diagram shows the upper tube assembly of the U-shaped lamp tube coating machine.

[0017] Figure 3 for Figure 2 A partial structural schematic diagram of the upper pipe device is shown.

[0018] Figure 4 This is a schematic diagram of the workstation clamp structure in the conveying mechanism of the present invention.

[0019] Figure 5 This is a structural diagram of the workstation clamp in the conveying mechanism of the present invention from another angle.

[0020] Figure 6 This is a schematic diagram showing the positional relationship between the workstation clamp and the stop pin.

[0021] Figure 7 This is a schematic diagram of the workstation clamp mounting base structure.

[0022] Figure 8 This is a schematic diagram of the workstation clamp structure for another alternative solution.

[0023] Figure 9 for Figure 1 The diagram shows the top pressure device structure of the U-shaped lamp tube coating machine.

[0024] Figure 10 This is a schematic diagram of the injection and suction assembly in the coating assembly of the present invention.

[0025] Figure 11 for Figure 1 The diagram shows the synchronous drive mechanism of the U-shaped lamp tube coating machine.

[0026] S: Upper tube device; Y: Top pressure device; M: Injection and suction assembly; 22: Drive sprocket; 23: Driven sprocket; 24: Conveyor chain; 25: Straight chain groove; H: Drying device; X: Lower tube device; D: Synchronous drive mechanism;

[0027] 101: Upper pipe swing arm; k1: Connecting hole; 102: Upper pipe lifting assembly; 11: Transfer support plate; 12: Upper pipe slide rail; E: Workstation clamp;

[0028] 1: Station clamp (excluding mounting base); 2: Station clamp jaws; 3: Station clamp mounting base; 4: Spring plate; 5: Spring; 6: Push rod; 6.1: Lower first push rod; 6.2: Lower second push rod; 6.3: Upper first push rod; 6.4: Lower second push rod; 7: Station clamp pivot; 9: Stop pin; 9.1: First stop pin; 9.2: Second stop pin; a: Groove; b: Flat groove; 10: Spring plate mounting rod;

[0029] 301: Top pressure rubber block; 302: Top pressure front seat; 303: Slide rod seat; 304: Slide rod; 305: Joint bearing; 306: Connecting rod; 307: Fixed seat; 308: Drive lever; 309: Lever mounting seat; k3: Connecting hole;

[0030] 401: Partial frame; 402: Injection and suction assembly mounting plate; 403: Injection and suction lifting pipe seat; 404: Injection pump; 405: Liquid pipe clamp seat; 406: Injection pipe; 407: Suction pipe; 408: Flexible rubber hose. Detailed Implementation

[0031] The structural features of the annular conveying coating system of the present invention will be further explained below, taking a U-shaped lamp tube coating machine using the annular conveying coating system of the present invention as an example.

[0032] like Figure 1 and Figure 4 As shown, the U-shaped lamp tube coating machine of the present invention mainly consists of an annular clamping and conveying mechanism, an upper tube device S, a coating assembly, a drying device H, a lower tube device X, and a synchronous drive mechanism D. The annular clamping and conveying mechanism consists of an annular conveying chain mechanism and multiple station clamps E for clamping U-shaped lamp tubes evenly arranged on the conveying chain of the annular conveying chain mechanism. The annular conveying chain mechanism includes a driving sprocket 22, a driven sprocket 23, a conveying chain 24, and two straight chain grooves 25. The driving sprocket 22, the driven sprocket 23, and the chain grooves 25 are all horizontally mounted on the frame by a support body. The conveying chain 24 is arranged to form a horizontal ring around the driving sprocket 22 and the driven sprocket 23. The opening of the chain grooves 25 faces outward, and the two straight segments of the conveying chain 24 are respectively located in the two chain grooves 25. Multiple station clamp mounting seats 3 are evenly installed on the conveying chain 24, and one station clamp 1 is installed on each station clamp mounting seat 3.

[0033] The surrounding ring conveyor mechanism is equipped with an upper tube station, a first flipping station, a liquid injection station, a secondary suction station, a drying station, and a lower tube station.

[0034] The pipe-mounting station is equipped with a pipe-mounting device S, which includes a pipe-mounting base, a pipe-mounting slide rail assembly, and a connection support assembly mounted on the pipe-mounting base.

[0035] like Figure 2 and Figure 3 As shown, the upper tube slide rail assembly includes an upper tube slide rail 12 for hanging an inverted U-shaped lamp tube and two upper tube lifting assemblies. The upper tube slide rail has two blocking protrusions, and the two upper tube lifting assemblies 102 are respectively disposed below the two blocking protrusions. Each upper tube lifting assembly includes an upper tube lifting rod vertically slidably mounted on the upper tube base and a lifting block fixed to the upper end of the upper tube lifting rod. The lifting block includes a lifting plane that contacts the lower end of the lamp tube and a resting surface for the lower end of the lamp tube to rest on. The lower end of the upper tube lifting rod presses against an upper tube swing arm 101 and is connected to the upper tube swing arm wall via a tension spring. The upper tube swing arm 101 is swayably mounted at the bottom of the upper tube base.

[0036] The transfer support assembly includes a transfer lifting rod and a transfer support plate 11 disposed on the upper end of the transfer lifting rod and non-contactly connected to the end of the upper tube slide rail near the work station clamp. The transfer lifting rod is vertically slidably disposed on the upper tube base, and the lower end of the transfer lifting rod presses against the upper tube swing arm 101. The upper tube swing arm is hinged to the upper end of the upper tube device connecting rod.

[0037] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the workstation clamp 1 has a groove a conforming to the shape of a lamp tube and a gripper 2. A cylinder fixed to the frame is located on the rear side of the workstation clamp 1, which can push the gripper 2 of the workstation clamp to open and close. The workstation clamp 1 is rotatably mounted on the workstation clamp mounting base 3 via a rotating shaft 7. The workstation clamp mounting base 3 is fixed to the conveyor chain 24. A pair of flat grooves b are provided on the rotating shaft, and a pair of spring plates 4 are provided on the workstation clamp mounting base. The pair of spring plates elastically press against the pair of flat grooves b on the rotating shaft, so that the workstation clamp 1 automatically returns to a horizontal position after rotation. A first push rod 6.1 and a second push rod 6.2 are respectively provided above and below the workstation clamp. At the flipping workstation, a first stop pin 9.1 fixed relative to the frame is provided to block the first push rod 6.1 and a second stop pin 9.2 to block the second push rod 6.2. An alternative is to set the push rod 6 on the rotating shaft 7 of the workstation clamp, such as... Figure 8 As shown, this can avoid the situation where the main body of the workstation clamp may collide with the stop pin 9 during the flipping process.

[0038] The liquid injection station is equipped with two sets of injection components M and a top pressure device Y.

[0039] like Figure 9As shown, the pressing device Y includes a slide bar seat 307 horizontally mounted on the frame and a horizontal slide bar 304 slidably mounted on the slide bar seat. A rubber pressing block 301 is fixed to one end of the horizontal slide bar 304 near the work station clamp, and the other end is hinged to the pressing device connecting rod 308 that provides linear drive.

[0040] like Figure 10 As shown, the injection / absorption assembly M includes an injection / absorption assembly mounting plate 402 mounted on a frame 401 and equipped with a vertical slide rail, an injection / absorption lifting seat 403 mounted on the slide rail, and an injection pipe 406 and an aspiration pipe 407 fixed on the injection / absorption lifting seat. The upper ends of the injection / absorption lifting seat 403 and the vertically arranged injection / absorption assembly connecting rod 409 are hinged, and the connecting rod provides the power for vertical sliding. The upper end of the injection pipe is connected to a storage tank via a flexible hose, and an injection pump 404 is installed between the two. The upper end of the aspiration pipe is connected to a suction pump via a flexible hose, and the suction pump is connected to the storage tank. The lower end of the aspiration pipe is connected to a section of flexible tubing 408. The injection pipe and the aspiration pipe are arranged vertically side by side, each aligned with one of the two openings of a lamp tube.

[0041] The secondary suction station is equipped with a secondary suction assembly, which includes a suction tube, a suction lifting seat for fixing the suction tube, and a suction assembly mounting plate for mounting the suction lifting seat. The suction lifting seat is vertically and flexibly mounted on the suction assembly mounting plate via a vertical guide rail mechanism, and the suction assembly mounting plate is fixed to the frame. The upper end of the suction tube is directly or indirectly connected to the inlet end of the suction pump, and the lower end of the suction tube is connected to a section of flexible rubber tubing.

[0042] The drying station is equipped with a membrane liquid drying device H, which includes a heating tube installed above the conveyor link, fixed by a frame, and containing an electric heating wire; the heating tube is connected to a long hot air square tube; there are two hot air square tubes, which are respectively arranged on both sides of the frame; several hot air nozzles with downward openings are provided on the hot air square tubes; the hot air nozzles are arranged corresponding to the station clamps.

[0043] The tube lowering station is equipped with a tube lowering device, which includes a tube lowering base, a tube lowering slide rail assembly and a tube lowering connection support assembly mounted on the tube lowering base. The tube lowering slide rail assembly includes a tube lowering slide rail for hanging U-shaped lamp tubes upside down and a tube lowering lifting assembly. A blocking protrusion is provided on the tube lowering slide rail. The tube lowering lifting assembly is located below the blocking protrusion. The tube lowering lifting assembly includes a tube lowering rod vertically slidably mounted on the tube lowering base and a lifting block fixed to the upper end of the tube lowering rod. The lifting block includes a lifting plane that contacts the lower end of the lamp tube and a resting surface for the lower end of the lamp tube to rest on. The lower end of the tube lowering rod presses against a tube lowering arm and is connected to the tube lowering arm wall by a tension spring. The tube lowering arm 101 is swayably mounted at the bottom of the upper tube base. The transfer support assembly includes a transfer lifting rod and a transfer support plate disposed on the upper end of the transfer lifting rod, which is non-contactly connected to the end of the lower tube slide rail near the workstation clamp. The transfer lifting rod is vertically slidably disposed on the lower tube base, and the lower end of the transfer lifting rod abuts against the lower tube swing arm. The lower tube swing arm is hinged to the upper end of the lower tube device connecting rod.

[0044] Preferably, each of the workstation clamps described in this invention can clamp two U-shaped lamp tubes, and the corresponding upper tube device, top pressing device, liquid injection and extraction mechanism, and lower tube device are all arranged in pairs. This doubles the production efficiency of the coating machine.

[0045] like Figure 11 As shown, the synchronous drive mechanism is installed below the complete coating equipment of the present invention, including a motor 501, a main shaft 502 connected to the output end of the motor, a first cam 503, a second cam 504, a third cam 505, and a fourth cam mounted on the main shaft, and a first swing rod 506, a second swing rod 308, a third swing rod 507, and a fourth swing rod that are oscillating relative to the frame.

[0046] The first rocker arm 506 is a linear rocker arm with the swing axis located in the middle of the rocker arm. The first rocker arm of the first rocker arm abuts against the first cam. The second rocker arm of the first rocker arm is hinged to the lower end of the upper tube device connecting rod 510. The upper end of the upper tube device connecting rod 510 is hinged to the upper tube rocker arm 101.

[0047] The second rocker arm 308 is a bent L-shaped rocker arm, with the swing axis located at the bend of the rocker arm. The first rocker arm of the second rocker arm abuts against the second cam, and the upper end of the second rocker arm of the second rocker arm is hinged to the connecting rod of the pressing device.

[0048] The third rocker arm 507 is a linear rocker arm with the swing shaft located at the first end of the rocker arm. The middle part of the third rocker arm abuts against the third cam. The second end of the third rocker arm is hinged to the lower end of the injection assembly connecting rod 409. The upper end of the injection assembly connecting rod 409 is hinged to the injection lifting seat 403, that is, the shaft holes k1 and k2 are concentrically fitted and hinged.

[0049] The fourth rocker arm is a linear rocker arm with its swing axis located in the middle. The first rocker arm of the fourth rocker arm rests against the fourth cam. The second rocker arm of the fourth rocker arm is hinged to the lower end of the lower tube device connecting rod, and the upper end of the lower tube device connecting rod is hinged to the lower tube rocker arm.

[0050] The designed cam-linkage mechanism can periodically output the vertical motion driving force required by each device through the link.

[0051] It is conceivable that the above description is not a limitation of the present invention, and the present invention is not limited to the examples given above. Any changes, additions or substitutions made by those skilled in the art within the scope of the present invention should be protected by the present invention.

Claims

1. A ring conveying coating system for a U-shaped lamp tube coating machine, comprising a ring clamping conveying mechanism for conveying U-shaped lamp tubes and a coating assembly for applying a film liquid to the inner wall of the lamp tube; the ring clamping conveying mechanism includes a ring conveying chain mechanism and a plurality of station clamps for clamping U-shaped lamp tubes evenly arranged on the conveying chain of the ring conveying chain mechanism; the coating assembly includes a liquid storage tank, an injection pump, a suction pump, and an injection / suction assembly; the inlet end of the injection pump is connected to the liquid storage tank via a hose, and the outlet end of the suction pump is connected to the liquid storage tank via a hose. Its features are, The workstation clamp is rotatably mounted on the workstation clamp mounting base via a rotating shaft. The workstation clamp mounting base is fixed to the conveyor chain. The rotating shaft is provided with a pair of flat grooves, and the workstation clamp mounting base is provided with a pair of spring plates. The pair of spring plates elastically press against the pair of flat grooves on the rotating shaft. A first push rod and a second push rod are provided above and below the workstation clamp, respectively. At the flipping workstation, a first stop pin fixed relative to the frame is provided to block the first push rod and a second stop pin to block the second push rod. The injection and suction assembly includes an injection tube and a suction tube arranged side by side, an injection and suction lifting seat for fixing the injection tube and the suction tube, and an injection and suction assembly mounting plate for mounting the injection and suction lifting seat. The injection and suction lifting seat is movably mounted on the injection and suction assembly mounting plate via a vertical guide rail mechanism, and the injection and suction assembly mounting plate is fixed to the frame. The distance between the injection tube and the suction tube is equal to the distance between the two straight tubes of the U-shaped lamp tube. The upper end of the injection tube is directly or indirectly connected to the liquid outlet of the injection pump, and the upper end of the suction tube is directly or indirectly connected to the liquid inlet of the suction pump. The lower end of the suction tube is connected to a section of soft rubber tubing. The injection lifting seat is hinged to the upper end of an injection assembly connecting rod, and the lower end of the injection assembly connecting rod is hinged to the swing end of an injection drive swing rod. The injection drive swing rod is a single-arm swing rod, with the swing axis located at the other end of the swing rod. The middle part of the swing rod presses against an injection drive cam. The injection drive cam is mounted on a main shaft, which is driven to rotate by a motor. The injection drive cam drives the injection drive swing rod to swing, and the injection drive swing rod drives the injection lifting seat to rise and fall through the injection assembly connecting rod. The coating assembly also includes a secondary suction assembly, which includes a suction tube, a suction lifting seat for fixing the suction tube, and a suction assembly mounting plate for mounting the suction lifting seat. The suction lifting seat is movably mounted on the suction assembly mounting plate via a vertical guide rail mechanism, and the suction assembly mounting plate is fixed to the frame. The upper end of the suction tube is directly or indirectly connected to the inlet end of the suction pump, and the lower end of the suction tube is connected to a section of soft rubber tubing.

2. The annular conveying coating system according to claim 1, characterized in that, The suction lifting seat is hinged to the upper end of a suction component connecting rod, and the lower end of the suction component connecting rod is hinged to the swing end of a suction drive swing rod. The suction drive swing rod is a single-arm swing rod, with the swing axis located at the other end of the swing rod. The middle part of the swing rod presses against a suction drive cam. The suction drive cam is mounted on a main shaft, which is driven to rotate by a motor. The suction drive cam drives the suction drive swing rod to swing, and the suction drive swing rod drives the suction lifting seat to rise and fall through the suction component connecting rod.

3. The annular conveying coating system according to claim 1, characterized in that, The coating assembly also includes a pressing device, which includes a slide bar seat horizontally mounted on the frame and a horizontal slide bar slidably mounted on the slide bar seat; a rubber pressing block is fixed at one end of the horizontal slide bar near the station clamp, and the other end is hinged to the pressing device connecting rod that provides linear drive.

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