A device and method for coating film inside a slender round tube

Abstract

The present invention discloses an in-tube coating device and method for a slender circular tube. The in-tube coating device for a slender circular tube comprises a flow control component, a film preparation component, a collection component, a photocuring component and an image observation component. By pumping a photocurable viscous fluid from a syringe pump into a drainage box, the fluid overflows from the liquid storage tank of the drainage box to the liquid outlet and enters the inner wall of the coating tube. A liquid film with periodic protrusions is formed under the influence of the gravity-driven flow. The film morphology characteristics are observed by the image observation component to determine whether the coating requirements are met. The recorded information is fed back to the syringe pump to adjust the injection pump flow. The liquid film is photocured by the photocuring component to form a solid film with periodic protrusions on the inner wall of the slender circular tube. The preparation cost of the device is greatly reduced, and the operation is simple. At the same time, the prepared film with uniform structure has the advantages of controllable size, high precision and stable performance, and can be widely promoted in the coating of slender circular tubes.

Description

Technical Field

[0001] The invention relates to the technical field of round tube coating devices, and in particular to a device and method for coating an inner tube of a slender round tube. Background Art

[0002] Slender round tubes are hollow round tube structures with a large aspect ratio, and are widely used in energy systems and industrial manufacturing, such as urban water supply pipelines and solar water heater collector tubes. The microstructure (periodic protrusions) on the inner wall of the round tube has a great influence on the flow characteristics and heat transfer characteristics in the tube, and has the advantages of reducing flow resistance and enhancing heat transfer. Therefore, coating a film with a periodic protrusion structure on the inner wall of a slender tube has important scientific significance and application value.

[0003] The coating inside slender round tubes has always been a technical problem that needs to be solved urgently in the industry. At present, the commonly used coating methods for round tubes include vacuum evaporation coating, ion beam deposition coating, magnetron sputtering coating, etc. However, these methods are not applicable to the coating of the inner wall of slender round tubes. This is mainly due to the structural characteristics of the round tubes, the coating working principle and the size of the equipment, which make it difficult to insert the equipment into the round tubes with a large aspect ratio to achieve uniform structure coating. Therefore, there is an urgent need for efficient and reliable coating devices and coating methods to improve the coating effect. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for coating inside a slender round tube, aiming to solve the technical problem that the equipment in the prior art for coating inside a tube with a large aspect ratio is difficult to insert into the slender round tube for coating.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present invention provides an in-tube coating device for an elongated circular tube, comprising a fixed back plate, a flow control component, a thin film preparation component, a collection component, a photocuring component and an image observation component, wherein the flow control component comprises a syringe pump, a syringe, a hose and a hose adapter, wherein the syringe pump is fixedly connected to the fixed back plate and is located on one side of the fixed back plate, wherein the syringe is detachably connected to the syringe pump, wherein one end of the hose is connected to the syringe and the other end is connected to the hose adapter, wherein the other end of the hose adapter is threadedly connected to the thin film preparation component;

[0006] The film preparation assembly includes a fixed bracket, a drainage box, a drainage cover, a drainage sleeve, a sealing cover, a drainage port positioning clamp and a film coating tube. The fixed bracket is fixedly connected to the fixed back plate and is located on the same side of the fixed back plate as the injection pump. The drainage box is fixedly connected to the fixed bracket. The drainage cover is detachably connected to the drainage box and is located above the drainage box. The drainage sleeve is threadedly connected to the drainage box and is located on a side away from the drainage cover. The sealing cover is detachably connected to the drainage box and is located on a side of the drainage sleeve away from the drainage box. The drainage port positioning clamp is detachably connected to the sealing cover and is located on a side of the sealing cover away from the drainage sleeve. The film coating tube is located in the drainage sleeve and is connected to the drainage box.

[0007] The collecting assembly comprises a liquid collector and a platform positioning member, wherein the liquid collector is located in the orthographic projection direction of the coating tube, the platform positioning member is located on one side of the liquid collector, and the coating tube extends into the liquid collector;

[0008] The light curing assembly includes an electric slide member and a light curing lamp, wherein the electric slide member is fixedly connected to the fixed back plate and is parallel to the extension direction of the coating tube, and the light curing lamp is slidably connected to the electric slide member and faces one side of the coating tube;

[0009] The image observation assembly includes a camera tripod, a CCD camera and an image processor. The camera tripod is located on a side of the coating tube away from the platform positioning member. The CCD camera is detachably connected to the camera tripod and faces one side of the coating tube. The image processor is electrically connected to the CCD camera.

[0010] Among them, the hose adapter includes an interface body, a supporting part and an adapter sealing ring, the interface body has a conical port and a threaded port, the conical port is fixedly connected to the interface body, and the hose is inserted into it to communicate with the hose, the threaded port is fixedly connected to the interface body, and is threadedly connected to the drainage box, the supporting part is fixedly connected to the interface body, and is sleeved on the interface body, the supporting part has an adapter groove, the adapter sealing ring is located in the adapter groove, and abuts the drainage box and the hose adapter.

[0011] Among them, the drainage box has a liquid outlet, a liquid storage tank and a liquid inlet, the liquid outlet longitudinally penetrates the drainage box and is connected with the drainage sleeve, the liquid storage tank is located around the liquid outlet, a liquid storage boss is formed between the liquid outlet and the liquid storage tank, and the liquid storage boss has a gap toward the upper surface of the drainage cover, one end of the liquid inlet is connected with the liquid storage tank, and the other end is connected with the hose adapter.

[0012] Wherein, the drainage box also has a first groove, and the first groove is located around the liquid storage tank. The film preparation component also includes a first sealing ring, and the first sealing ring is located in the first groove to support the drainage cover and the drainage box.

[0013] Wherein, the drainage sleeve has a first through hole and a second through hole, the liquid outlet, the first through hole and the second through hole are connected in sequence, the second through hole is located on the side close to the sealing cover, and the diameter of the first through hole is equal to the inner diameter of the coated tube, the diameter of the second through hole is larger than the diameter of the first through hole, and the diameter of the second through hole is equal to the outer diameter of the coated tube.

[0014] The sealing cover has a chassis groove, a second groove and a tube wall groove, wherein the chassis groove is located on the side of the sealing cover facing the drainage sleeve, the second groove is located around the chassis groove, and the tube wall groove is located on the side of the sealing cover facing the drainage port positioning clamp.

[0015] Among them, the thin film preparation assembly also includes a chassis, a second sealing ring and a tube wall sealing ring. The chassis is fixedly connected to the drainage sleeve and is located in the chassis groove. The second sealing ring is located in the second groove, supporting the sealing cover and the drainage box. The tube wall sealing ring is located in the tube wall groove, supporting the sealing cover and the coating tube.

[0016] Among them, the platform positioning component includes a supporting platform, a telescopic frame, a displacement platform and a fixed clamp, the supporting platform is located below the liquid collector, the telescopic frame is rotatably connected to the supporting platform and is located below the supporting platform, the displacement platform is fixedly connected to the supporting platform and is located on the side of the liquid collector away from the image observation component, and the fixed clamp is fixedly connected to the displacement platform to clamp the coating tube.

[0017] Among them, the electric slide rail member includes a fixing member, a screw, a driving member and a sliding member. The fixing member is fixedly connected to the fixing clamp and is arranged in the same direction as the coating tube. The screw is rotatably connected to the fixing member. The output shaft of the driving member cooperates with the screw. The sliding member is slidably connected to the screw and is fixedly connected to the light curing lamp.

[0018] In a second aspect, the present invention provides a method for coating an inner portion of a slender circular tube, comprising:

[0019] Outputting a coating signal to the injection pump, driving the injection pump to pump out the light-curing viscous fluid at a first preset speed, and the fluid enters the liquid storage tank through the hose and overflows to the liquid outlet to enter the inner wall of the coating tube;

[0020] Outputting an observation signal to the CCD camera, controlling the CCD camera to take pictures of the coated tube at a preset time and a preset frame rate, obtaining an observation picture of the fluid morphology, and transmitting the picture to the image processor for processing;

[0021] Receive the observed image and process it to obtain the descending speed of the light-cured viscous fluid and the morphological characteristic image of the fluid film;

[0022] Determine whether the morphological characteristics of the fluid film meet the coating requirements;

[0023] If yes, output a movement signal to the driving member to drive the screw to rotate, control the sliding member to slide along the extension direction of the screw, output a curing signal to the light curing lamp, and control the light curing lamp to cure the fluid in the coating tube;

[0024] If not, an adjustment signal is output to the injection pump to pump out the light-curing viscous fluid at a second preset speed. The fluid enters the liquid storage tank through the hose and overflows to the liquid outlet to enter the inner wall of the coating tube until the morphological characteristics of the fluid film meet the coating requirements.

[0025] The present invention provides a device and method for coating inside a slender circular tube. The device pumps out a photocurable viscous fluid stably from the injection pump into the drainage box. The fluid overflows from the liquid storage tank of the drainage box to the liquid outlet and enters the inner wall of the coating tube. A liquid film with periodic protrusions is formed under the influence of the gravity-driven flow. The film morphology is then observed by the image observation component to determine whether the coating requirements are met. If the requirements are not met, the recorded information is fed back to the injection pump to adjust the flow rate. Finally, the liquid film is quickly photocured by the photocuring component to form a solid film with periodic protrusions on the inner wall of the slender circular tube. The application of this device greatly reduces the preparation cost and is simple to operate. At the same time, the uniformly structured film prepared has the advantages of controllable size, high precision, and stable performance. It can be widely promoted in the coating of long and slender circular tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic structural diagram of the in-tube coating device of the slender round tube of the present invention;

[0028] Figure 2 is a schematic structural diagram of a light-curing assembly of the present invention;

[0029] Figure 3 It is a schematic diagram of the exploded structure of the drainage box, drainage cover, drainage sleeve, sealing cover and drainage port positioning clamp of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the drainage box of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the displacement platform and the fixing clamp of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the hose adapter of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the drainage port positioning clip of the present invention;

[0034] Figure 8 It is a characteristic diagram of the fluid film morphology of the coated tube of the present invention;

[0035] Fig. 9 It is a schematic flow chart of a method for coating an inner portion of a slender round tube provided by an embodiment of the present invention;

[0036] In the figure: 100-tube coating device for slender round tube, 1-fixed back plate, 2-flow control component, 3-film preparation component, 4-collection component, 5-light curing component, 6-image observation component, 21-syringe pump, 22-syringe, 23-hose, 24-hose adapter, 31-fixed bracket, 32-drainage box, 33-drainage cover, 34-drainage sleeve, 35-sealing cover, 36-drainage port positioning clamp, 37-first sealing ring, 38-chassis, 39-second sealing ring, 41-liquid collector, 42-platform positioning member, 51-electric slide rail member, 52-light curing lamp, 61-camera tripod, 62- CCD camera, 241-interface body, 242-supporting part, 321-liquid outlet, 322-liquid storage tank, 323-liquid inlet, 324-liquid storage boss, 325-first groove, 341-first through hole, 342-second through hole, 351-chassis groove, 352-second groove, 353-tube wall groove, 421-support platform, 422-telescopic frame, 423-displacement platform, 424-fixing clamp, 511-fixing part, 512-screw, 513-driving part, 514-sliding part, 2411-conical port, 2412-threaded port, 2421-adapter groove, 200-coated tube. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0039] See also Figures 1 to 8 The present invention provides an in-tube coating device 100 for a slender circular tube, comprising a fixed back plate 1, a flow control component 2, a thin film preparation component 3, a collection component 4, a light curing component 5 and an image observation component 6. The flow control component 2 comprises a syringe pump 21, a syringe 22, a hose 23 and a hose adapter 24. The syringe pump 21 is fixedly connected to the fixed back plate 1 and is located on one side of the fixed back plate 1. The syringe 22 is detachably connected to the syringe pump 21. One end of the hose 23 is connected to the syringe 22, and the other end is connected to the hose adapter 24. The other end of the hose adapter 24 is threadedly connected to the thin film preparation component 3.

[0040] The film preparation assembly 3 includes a fixed bracket 31, a drainage box 32, a drainage cover 33, a drainage sleeve 34, a sealing cover 35, a drainage port positioning clamp 36 and a coating tube 200. The fixed bracket 31 is fixedly connected to the fixed back plate 1 and is located on the same side of the fixed back plate 1 as the injection pump 21. The drainage box 32 is fixedly connected to the fixed bracket 31 and is positioned through the through hole of the fixed bracket 31. The drainage box 32 has a liquid outlet 321, a liquid storage tank 322 and a liquid inlet 323. The liquid outlet 321 longitudinally penetrates the drainage box 32. The liquid storage tank 322 is located around the liquid outlet 321. A liquid storage boss 324 is formed between the liquid outlet 321 and the liquid storage tank 322. The liquid inlet 323 is connected to the liquid storage tank 322. The drainage cover 33 is detachably connected to the drainage box 32. The drain box 32 is located above the drain cover 33, and there is a gap between the lower surface of the drain cover 33 facing the liquid storage boss 324 and the upper surface of the liquid storage boss 324 facing the drain cover 33. One end of the hose 23 is fixedly connected to the syringe 22, and the other end of the hose 23 is communicated with the hose adapter 24. The drain sleeve 34 is threadedly connected to the drain box 32 and is located on a side away from the drain cover 33 and is communicated with the liquid outlet 321. The sealing cover 35 is detachably connected to the drain box 32 and is located on a side of the drain sleeve 34 away from the drain box 32. The drainage port positioning clip 36 is detachably connected to the sealing cover 35 and is located on a side of the sealing cover 35 away from the drain sleeve 34. The coated tube 200 is located in the drain sleeve 34 and is communicated with the drain box 32.

[0041] The collecting assembly 4 includes a liquid collector 41 and a platform positioning member 42. The liquid collector 41 is located in the orthographic projection direction of the coating tube 200. The platform positioning member 42 is located on one side of the liquid collector 41. The coating tube 200 is located in the drainage sleeve 34, and is connected to the liquid outlet 321 of the liquid outlet hole, and extends into the liquid collector 41.

[0042] The light curing assembly 5 includes an electric slide member 51 and a light curing lamp 52. The electric slide member 51 is fixedly connected to the fixed back plate 1 and is parallel to the extension direction of the coating tube 200. The light curing lamp 52 is slidably connected to the electric slide member 51 and faces one side of the coating tube 200.

[0043] Specifically, the in-tube coating device 100 of the slender round tube also includes a controller, which refers to a main command device that changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit in a predetermined order to control the start, speed regulation, braking and reverse of the motor. It is composed of a program counter, an instruction register, an instruction decoder, a timing generator and an operation controller. It is a "decision-making body" for issuing commands, and the model can be HRVG-08E. The injection pump 21 is electrically connected to the controller, and the fixed back plate 1 is used to support the flow control component 2 and the film preparation component 3. The flow control component 2, the film preparation component 3, the collection component 4, the photocuring component 5 and the image observation component 6 are all located on the same side of the fixed back plate 1, and the fixed bracket 31 is fixed to the fixed back plate 1 by using angle bolts. The injection pump 21 is composed of a stepper motor and its driver, a screw rod and a bracket, etc., and has a reciprocating screw rod and a nut. When working, the single-chip computer system of the controller sends a control pulse to rotate the stepper motor, and the stepper motor drives the screw rod to convert the rotational motion into linear motion, pushing the piston of the syringe 22 for injection and infusion. The hose 23 connects the output port of the syringe 22 and the hose adapter 24. The hose adapter 24 is threadedly connected to the liquid inlet 323 of the drainage box 32, so that the coating fluid enters the liquid storage tank 322 of the drainage box 32. The drainage cover 33 is threadedly connected to the drainage box 32 and can be detached to clean the inside of the drainage box 32 to ensure the coating effect. In addition, the liquid storage boss 324 is formed between the liquid storage tank 322 and the liquid outlet 321, and the lower surface of the drainage cover 33 facing the liquid storage boss 324 and the lower surface of the drainage cover 33 facing the liquid storage boss 324 and the lower surface of the drainage cover 33 facing the liquid storage boss 324 The upper surface of the coating tube 200 is provided with a gap, which is a slit of 2.5 mm. When the light-curing viscous fluid flowing into the liquid storage tank 322 is full, it will slowly overflow from the gap into the liquid outlet 321. The drainage sleeve 34 is fixed below the drainage box 32 to drain the light-curing viscous fluid. The sealing cover 35 is fixed below the drainage sleeve 34 to prevent leakage of the light-curing viscous fluid. The coating tube 200 is a transparent tube, one end of which is located at the drainage sleeve 34. The light-curing viscous fluid is located in the flow sleeve 34, and the inner wall is connected to the liquid outlet 321, and the other end is located in the liquid collector 41 and is connected to the liquid collector 41. The liquid outlet 321, the coating tube 200 and the liquid collector 41 are on the longitudinal axis, so that the light-curing viscous fluid flows from the liquid outlet 321 to the inner wall of the coating tube 200 due to gravity for uniform coating. The liquid collector 41 is used to recycle the light-curing viscous fluid for next use, saving costs and preventing environmental pollution. The platform positioning member 42 is used to support the liquid collector 41 and fix the coating tube 200 for coating operation.The electric slide rail 51 is used to support and drive the light curing lamp 52 to move the coated tube 200 for curing. The electric slide rail 51 is parallel to the extension direction of the coated tube 200, which is conducive to uniform and rapid curing and enhances the coating effect. The light curing lamp 52 adopts a halogen lamp, which can emit a strong blue visible wave with a wavelength of about 300-500nm. The inner wall surface is coated by utilizing the strong light transmittance of the coated tube 200.

[0044] The drainage sleeve 34 has a first through hole 341 and a second through hole 342. The liquid outlet 321, the first through hole 341 and the second through hole 342 are connected in sequence. The second through hole 342 is located on the side close to the sealing cover 35, and the diameter of the first through hole 341 is equal to the inner diameter of the coated tube 200, and the diameter of the second through hole 342 is equal to the outer diameter of the coated tube 200. The diameter of the first through hole 341 is equal to the inner diameter of the coated tube 200, the diameter of the second through hole 342 is larger than the diameter of the first through hole 341, and the outer diameter of the coated tube 200 is equal to the diameter of the second through hole 342, that is, the tube body of the coated tube 200 is located in the second through hole 342, and the tube wall and the inner wall of the first through hole 341 are located on the same straight line, and the photocurable viscous fluid follows the inner wall of the first through hole 341 of the drainage box 32 and flows directly into the inner wall of the coated tube 200. The viscous fluid has a good coating effect and prevents dislocation. The photocurable viscous fluid can fall directly from the center of the tube body of the coated tube 200 into the liquid collector 41. In addition, the uneven distribution of the photocurable viscous fluid at the liquid outlet 321 will also cause uneven coating and reduce the coating effect.

[0045] The hose adapter 24 includes an interface body 241, a supporting member 242 and an adapter sealing ring. The interface body 241 has a conical port 2411 and a threaded port 2412. The conical port 2411 is fixedly connected to the interface body 241 and is inserted into the hose 23 to communicate with the hose 23. The threaded port 2412 is fixedly connected to the interface body 241 and is threadedly connected to the drainage box 32. The supporting member 242 is fixedly connected to the interface body 241 and is sleeved on the interface body 241. The supporting member 242 has a sealing ring groove 2421. The adapter sealing ring is located in the sealing ring groove 2421 to support the drainage box 32 and the hose adapter 24. The hose adapter 24 is used to connect the hose 23 and the drainage box 32. The conical port 2411 is fixedly connected to the interface body 241 and inserted into the hose 23 to be threadedly connected to the hose 23, which is convenient for disassembly and replacement of components, such as replacement of the injection pump 21, and prevents leakage of light-cured viscous fluid.

[0046] The drainage port positioning clamp 36 is threadedly connected to the sealing cover 35 and is located on a side of the sealing cover 35 away from the drainage sleeve 34. The drainage port positioning clamp 36 includes a first annular body and two first protrusions, the two first protrusions are integrally formed on both sides of the first annular body, and the two first protrusions have threaded holes. When the coating process is to be performed, the first annular body of the drainage port positioning clamp 36 is sleeved outside the coating tube 200, the annular body is fixed to the bottom of the sealing cover 35 by bolts, and the bolts are inserted into the two threaded holes to tighten and fix the coating tube 200 for coating operation, which is convenient for replacement and ensures the coaxiality of the coating tube 200 and the liquid outlet 321.

[0047] The drainage box 32 also has a first groove 325, which is located around the liquid storage tank 322. The film preparation assembly 3 also includes a first sealing ring 37, which is located in the first groove 325 and abuts against the drainage cover 33 and the drainage box 32. The drainage cover 33 and the drainage box 32 are sealed by the first sealing ring 37 disposed in the first groove 325 to prevent leakage of the photocurable viscous fluid.

[0048] The sealing cover 35 has a chassis groove 351, a second groove 352 and a tube wall groove 353, the chassis groove 351 is located on the side of the sealing cover 35 facing the drainage sleeve 34, the second groove 352 is located around the chassis groove 351, and the tube wall groove 353 is located on the side of the sealing cover 35 facing the drainage port positioning clamp 36; the film preparation component 3 also includes a chassis 38, a second sealing ring 39 and a tube wall sealing ring, the chassis 38 is fixedly connected to the drainage sleeve 34 and is located in the chassis groove 351, the second sealing ring 39 is located in the second groove 352, and the tube wall sealing ring is located in the tube wall groove 353. The bottom plate 38 fixedly connected to the drainage sleeve 34 is embedded in the bottom plate groove 351, which increases the connectivity between the drainage sleeve 34 and the sealing cover 35. The second sealing ring 39 is located in the second groove 352 of the sealing cover 35, which enhances the sealing between the drainage sleeve 34 and the sealing cover 35, and prevents the light-cured viscous fluid from leaking and polluting the instrument and the environment. At the same time, the tube wall sealing ring is located in the tube wall groove 353, which enhances the sealing between the sealing cover 35 and the coating tube 200, and prevents the light-cured viscous fluid from leaking and polluting the instrument and the environment.

[0049] The platform positioning member 42 includes a supporting platform 421, a telescopic frame 422, a displacement platform 423 and a fixing clamp 424. The supporting platform 421 is located below the liquid collector 41. The telescopic frame 422 is rotatably connected to the supporting platform 421 and is located below the supporting platform 421. The displacement platform 423 is fixedly connected to the supporting platform 421 and is located on a side of the liquid collector 41 away from the image observation component 6. The fixing clamp 424 is fixedly connected to the displacement platform 423 to clamp the coating tube 200. The support platform 421 is used to support the displacement platform 423, the fixing clamp 424 and the liquid collector 41. The telescopic frame 422 is used to drive the support platform 421 to extend and retract up and down, so that the coating tube 200 is held against the drainage sleeve 34, and can be used for coating operations in slender round tubes of different lengths. The telescopic frame 422 includes a plurality of first rods, a plurality of second rods, a plurality of support rods and a fixing rod. Two adjacent first rods are rotatably connected, two adjacent second rods are rotatably connected, adjacent first rods and second rods are cross-rotatably connected, and the support rod is rotatably connected with two oppositely arranged first rods. The fixing member 511 resists the support rod to limit the rising and falling distance of the telescopic frame 422. The fixing clamp 424 includes a second annular body and two second protrusions. Both of the two second protrusions have threaded holes. The two second protrusions are fixedly connected to the two sides of the second annular body. The second annular body is sleeved outside the coating tube 200. Bolts are passed through the two threaded holes to tighten and fix the coating tube 200, so as to ensure that the coating tube 200 is placed vertically.

[0050] The electric slide rail member 51 includes a fixing member 511, a screw rod 512, a driving member 513 and a sliding member 514. The fixing member 511 is fixedly connected to the fixed back plate 1 and is arranged in the same direction as the coating tube 200. The screw rod 512 is rotationally connected to the fixing member 511. The output shaft of the driving member 513 cooperates with the screw rod 512. The sliding member 514 is slidingly connected to the screw rod 512 and is fixedly connected to the light curing lamp 52. The fixing member 511 is used to support the rotation of the screw rod 512. The driving member 513 is a motor, which refers to an electromagnetic device that realizes electrical energy conversion or transmission according to the law of electromagnetic induction. Its main function is to generate a driving torque to drive the screw rod 512 to rotate. The motor, the screw rod 512 and the sliding member 514 form a screw structure. The motor is electrically connected to the controller. The controller drives the motor to drive the screw rod 512 to rotate, and then drives the sliding member 514 to slide along the extension direction of the screw rod 512. The light curing lamp 52 is fixedly connected to the sliding member 514, thereby driving the light curing lamp 52 to quickly cure the coated tube 200.

[0051] The image observation assembly 6 includes a camera tripod 61, a CCD camera 62 and an image processor. The camera tripod 61 is located on a side of the coating tube 200 away from the platform positioning member 42. The CCD camera 62 is fixedly connected to the camera tripod 61 and faces a side of the coating tube 200. The image processor is electrically connected to the CCD camera 62. The camera tripod 61 is used to support the CCD camera 62. The image processor is electrically connected to the controller. The lens of the CCD camera 62 is vertically facing the coating tube 200 at a distance of about 40 cm from the drainage sleeve 34 to observe the fluid film on the inner wall of the coating tube 200. The image processor receives the observation picture taken by the CCD camera 62 for processing, determines whether the coating effect and film morphology characteristics of the inner wall of the coating tube 200 meet the coating requirements, and forms feedback information for fine-tuning operations. Specifically, the controller outputs a coating signal to the injection pump 21, controls the injection pump 21 to stably pump out the light-curing viscous fluid into the liquid storage tank 322 in the drainage box 32, and when the light-curing viscous fluid fills the entire liquid storage tank 322, the light-curing viscous fluid overflows to the liquid outlet 321 and enters the inner wall of the coating tube for coating; the controller outputs an observation signal to the CCD camera 62, controls the CCD camera 62 to photograph the coating tube 200, obtains an observation picture and transmits it to the image processor for processing to obtain the descending speed of the viscous fluid and the morphological characteristics of the fluid film, and judges the flow The controller receives the qualified processing result information of the image processor, outputs a movement signal to the driving member 513, controls the rotation of the screw 512 to drive the light-curing lamp 52 to move along the extension direction of the screw 512, and outputs a curing signal to the light-curing lamp 52 to cure the coating tube 200; the controller receives the unqualified processing result information of the image processor, outputs an adjustment signal to the injection pump 21 to adjust the flow rate and flow of the light-curing viscous fluid until the morphological characteristics of the fluid film meet the coating requirements.

[0052] Second, see Fig. 9 , Fig. 9 1 is a schematic flow chart of a method for coating an inner tube of a slender round tube provided by an embodiment of the present invention. Specifically, the method for coating an inner tube of a slender round tube may include the following steps:

[0053] S101, outputting a coating signal to the injection pump 21, driving the injection pump 21 to pump out the light-curing viscous fluid at a first preset speed, and the fluid enters the liquid storage tank 322 through the hose 23, overflows to the liquid outlet 321 and enters the inner wall of the coating tube;

[0054] S102, outputting an observation signal to the CCD camera 62, controlling the CCD camera 62 to take pictures of the coated tube at a preset time and a preset frame rate, obtaining an observation picture of the fluid morphology, and transmitting the picture to the image processor for processing;

[0055] S103, receiving the observed image and processing it to obtain the descending speed of the viscous fluid and the morphological characteristic diagram of the fluid film;

[0056] S104, judging whether the morphological characteristics (periodic convex structure) of the fluid film meet the coating requirements;

[0057] If yes, a moving signal is output to the driving member 513 to drive the screw 512 to rotate, control the sliding member 514 to slide along the extending direction of the screw 512, and output a curing signal to the light curing lamp 52 to control the light curing lamp 52 to perform curing on the coated tube;

[0058] If not, an adjustment signal is output to the injection pump 21 to pump out the light-curing viscous fluid at a second preset speed. The fluid enters the liquid storage tank 322 through the hose and overflows to the liquid outlet 321 to enter the inner wall of the coating tube until the morphological characteristics of the fluid film meet the coating requirements.

[0059] For the specific implementation contents of the embodiment of the present invention, please refer to the specific implementation methods of the in-tube coating device 100 of the slender circular tube in the first aspect, which will not be described in detail here.

[0060] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A film coating device for an elongated round tube. It is characterized in that It includes a fixed back plate, a flow control component, a film preparation component, a collection component, a light curing component and an image observation component. The flow control component includes a syringe pump, a syringe, a hose and a hose adapter. The syringe pump is fixedly connected to the fixed back plate and is located on one side of the fixed back plate. The syringe is detachably connected to the syringe pump. One end of the hose is connected to the syringe, and the other end is connected to the hose adapter. The other end of the hose adapter is threadedly connected to the film preparation component. The film preparation assembly includes a fixed bracket, a drainage box, a drainage cover, a drainage sleeve, a sealing cover, a drainage port positioning clamp and a film coating tube. The fixed bracket is fixedly connected to the fixed back plate and is located on the same side of the fixed back plate as the injection pump. The drainage box is fixedly connected to the fixed bracket. The drainage cover is detachably connected to the drainage box and is located above the drainage box. The drainage sleeve is threadedly connected to the drainage box and is located on a side away from the drainage cover. The sealing cover is detachably connected to the drainage box and is located on a side of the drainage sleeve away from the drainage box. The drainage port positioning clamp is detachably connected to the sealing cover and is located on a side of the sealing cover away from the drainage sleeve. The film coating tube is located in the drainage sleeve and is connected to the drainage box. The collecting assembly comprises a liquid collector and a platform positioning member, wherein the liquid collector is located in the orthographic projection direction of the coating tube, the platform positioning member is located on one side of the liquid collector, and the coating tube extends into the liquid collector; The light curing assembly includes an electric slide member and a light curing lamp, wherein the electric slide member is fixedly connected to the fixed back plate and is parallel to the extension direction of the coating tube, and the light curing lamp is slidably connected to the electric slide member and faces one side of the coating tube; The image observation assembly comprises a camera tripod, a CCD camera and an image processor, wherein the camera tripod is located at a side of the coating tube away from the platform positioning member, the CCD camera is detachably connected to the camera tripod and faces one side of the coating tube, and the image processor is electrically connected to the CCD camera; The drainage box has a liquid outlet, a liquid storage tank and a liquid inlet. The liquid outlet longitudinally penetrates the drainage box and is connected to the drainage sleeve. The liquid storage tank is located around the liquid outlet. A liquid storage boss is formed between the liquid outlet and the liquid storage tank. The liquid storage boss has a gap toward the upper surface of the drainage cover. One end of the liquid inlet is connected to the liquid storage tank, and the other end is connected to the hose adapter.

2. The in-tube coating device for an elongated round tube as claimed in claim 1, It is characterized in that The hose adapter includes an interface body, a supporting member and an adapter sealing ring. The interface body has a conical port and a threaded port. The conical port is fixedly connected to the interface body and is inserted into the hose to communicate with the hose. The threaded port is fixedly connected to the interface body and is threadedly connected to the drainage box. The supporting member is fixedly connected to the interface body and is sleeved on the interface body. The supporting member is provided with an adapter groove. The adapter sealing ring is located in the adapter groove to support the drainage box and the hose adapter.

3. The in-tube coating device for an elongated round tube as claimed in claim 1, It is characterized in that The drainage box also has a first groove, which is located around the liquid storage tank. The film preparation component also includes a first sealing ring, which is located in the first groove and abuts against the drainage cover and the drainage box.

4. The in-tube coating device for an elongated round tube as claimed in claim 3, It is characterized in that The drainage sleeve has a first through hole and a second through hole, the liquid outlet, the first through hole and the second through hole are connected in sequence, the second through hole is located on the side close to the sealing cover, and the diameter of the first through hole is equal to the inner diameter of the coated tube, the diameter of the second through hole is larger than the diameter of the first through hole, and the diameter of the second through hole is equal to the outer diameter of the coated tube.

5. The in-tube coating device for an elongated round tube as claimed in claim 1, It is characterized in that The sealing cover has a bottom plate groove, a second groove and a tube wall groove. The bottom plate groove is located on the side of the sealing cover facing the drainage sleeve, the second groove is located around the bottom plate groove, and the tube wall groove is located on the side of the sealing cover facing the drainage port positioning clamp.

6. The in-tube coating device for an elongated round tube as claimed in claim 5, It is characterized in that The thin film preparation assembly also includes a chassis, a second sealing ring and a tube wall sealing ring. The chassis is fixedly connected to the drainage sleeve and is located in the chassis groove. The second sealing ring is located in the second groove and abuts the sealing cover and the drainage box. The tube wall sealing ring is located in the tube wall groove and abuts the sealing cover and the coating tube.

7. The in-tube coating device for an elongated round tube as claimed in claim 1, It is characterized in that The platform positioning component includes a supporting platform, a telescopic frame, a displacement platform and a fixing clamp. The supporting platform is located below the liquid collector. The telescopic frame is rotatably connected to the supporting platform and is located below the supporting platform. The displacement platform is fixedly connected to the supporting platform and is located on a side of the liquid collector away from the image observation component. The fixing clamp is fixedly connected to the displacement platform to clamp the coating tube.

8. The in-tube coating device for an elongated round tube as claimed in claim 7, It is characterized in that The electric slide rail member includes a fixing member, a screw rod, a driving member and a sliding member. The fixing member is fixedly connected to the fixing clamp and is arranged in the same direction as the coating tube. The screw rod is rotationally connected to the fixing member. The output shaft of the driving member cooperates with the screw rod. The sliding member is slidably connected to the screw rod and is fixedly connected to the light curing lamp.

9. A method for coating an inner tube of a slender round tube, applied to the device for coating an inner tube of a slender round tube as claimed in claim 8, It is characterized in that include: Outputting a coating signal to the injection pump, driving the injection pump to pump out the light-curing viscous fluid at a first preset speed, and the fluid enters the liquid storage tank through the hose and overflows to the liquid outlet to enter the inner wall of the coating tube; Outputting an observation signal to the CCD camera, controlling the CCD camera to take pictures of the coated tube at a preset time and a preset frame rate, obtaining an observation picture of the fluid morphology, and transmitting the picture to the image processor for processing; Receive the observed image and process it to obtain the descending speed of the light-cured viscous fluid and the morphological characteristic image of the fluid film; Determine whether the morphological characteristics of the fluid film meet the coating requirements; If yes, output a movement signal to the driving member to drive the screw to rotate, control the sliding member to slide along the extension direction of the screw, output a curing signal to the light curing lamp, and control the light curing lamp to cure the fluid in the coating tube; If not, an adjustment signal is output to the injection pump to pump out the light-curing viscous fluid at a second preset speed. The fluid enters the liquid storage tank through the hose and overflows to the liquid outlet to enter the inner wall of the coating tube until the morphological characteristics of the fluid film meet the coating requirements.

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