A surface protection spraying system and method for a communication cable protection pipe

Abstract

The application discloses a communication cable protection pipe surface protection spraying system and method, and belongs to the field of communication cable protection pipe surface protection spraying technology. The system comprises a material rotating conveying device, a circulating spraying quick air-drying device and a discharging rotating receiving device. The method comprises the following steps: 1, communication cable protection pipe feeding; 2, spraying operation of the first section of the communication cable protection pipe; 3, quick air-drying operation of the first section of the communication cable protection pipe; 4, spraying and quick air-drying operation of the i-th section of the communication cable protection pipe; 5, multiple circulation of step 4 until the spraying and quick air-drying operation of the I-1-th section of the communication cable protection pipe is completed; and 6, spraying and quick air-drying operation of the last section of the communication cable protection pipe. The application is operated in a top-down single-row spraying mode in a sealed spraying bin, and the purpose of uniform spraying of the protection pipe is achieved by rotating the protection pipe through an external rotating device.

Description

Technical Field

[0001] This invention belongs to the field of protective coating technology for protective tube surfaces, specifically relating to a protective coating system and method for communication cable protective tube surfaces. Background Technology

[0002] Communication cables are used to transmit electrical or optical signals. During installation, various factors such as installation location, method, and requirements necessitate the use of protective conduits to protect the cables. Examples of locations where protective conduits are used include those crossing roads, entering homes, penetrating floors and walls, underwater installations, concealed installations within walls, and installations in high-temperature or high-temperature environments, dusty workspaces, and other special installation locations. Protective conduits prevent cable damage and are laid on the outer layer of the cable, providing a certain level of mechanical strength. The installation of protective conduits not only ensures the straight and horizontal arrangement of cables, facilitating future maintenance and replacement, but more importantly, they offer low-temperature resistance and impact resistance. The embrittlement temperature of the protective conduit is -70℃, making winter installation convenient. Furthermore, the strong oxidation and corrosion resistance of the protective conduit plays a crucial role in extending the service life of the internal cables, ensuring the safety of the cables during use, providing reliable and effective flame retardancy, resisting aging and overheating, and reducing the probability of failure.

[0003] In the production process of communication cable protection pipes, in order to achieve the aforementioned functions, in addition to physical and chemical control of the finished product in terms of materials, it is also necessary to enhance and assist in achieving these functions through final external surface spraying. The shortcomings of traditional spraying equipment and methods are mainly reflected in the following: First, traditional spraying equipment uses a closed space to perform opposing spraying operations on at least two sides of the pipe to ensure uniform spraying. However, this two-way spraying method not only requires a complex equipment structure but also generates excessive waste. The overall equipment span needs to be set according to the pipe length, resulting in a large footprint and increased overall equipment cost. A spraying work area matching the pipe length is also required. After spraying, the accumulation of excess paint and waste generated during the spraying process on the outside of the pipe will reduce the working surface area of ​​the spraying workspace. Firstly, traditional spraying equipment suffers from several drawbacks. Firstly, it lacks adequate support structures, resulting in gaps in the coating of the protective tubes at both ends after each coat, or areas left uncoated due to contact with the support, necessitating separate painting or cutting of the product later. Secondly, after spraying in a confined space, traditional equipment requires a prolonged pause or air drying process for material removal, which is time-consuming and impacts production turnaround time, leading to reduced efficiency. Furthermore, traditional equipment also suffers from deficiencies in material loading and unloading, exhibiting low levels of automation and overall low production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a surface protective spraying system for communication cable protection pipes, which addresses the shortcomings of the prior art. The system has a novel and reasonable design, a high degree of automation, reduces the number of internal equipment in the spraying chamber, recycles waste spraying resources, saves the amount of spraying material, has high spraying efficiency, occupies a small area, has low overall equipment cost, saves human resources, avoids waste accumulation, has a novel feeding and support method, provides comprehensive and thorough spraying, has a fast drying speed, high turnover efficiency, a high degree of mechanization, and is easy to promote and use.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a protective spraying system for the surface of a communication cable protection pipe, characterized in that: it includes a material rotary conveying device, a circulating spraying and rapid drying device that cooperates with the material rotary conveying device, and a discharge rotary receiving device that cooperates with the circulating spraying and rapid drying device.

[0006] The material rotary conveying device includes a feeding support frame with a transverse feeding trough in the middle. One side of the transverse feeding trough is connected to a storage silo located below the feeding support frame via a feeding channel. The storage silo is equipped with a material lifting plate that moves up and down. The outer side of the material lifting plate is connected to a material lifting device that is movably installed in a lifting trough on the side of the storage silo. The top of the feeding support frame is equipped with a feeding electric control track trolley with a feeding rotary motor. The output end of the feeding rotary motor is equipped with a feeding rotary bracket that is fixedly connected to the feeding electric control track trolley. The bottom of the feeding rotary bracket extends into the transverse feeding trough. A feeding rotary shaft is mounted on the feeding rotary bracket located in the transverse feeding trough via a first bearing. A feeding sleeve is fixedly installed at the output end of the feeding rotary shaft. The feeding rotary shaft is connected to the feeding rotary drive wheel installed on the output shaft of the feeding rotary motor via a feeding connecting belt.

[0007] The circulating spraying rapid drying device includes a sealed spraying chamber connected to a feeding chamber via a spraying limiting sleeve. Several high-pressure atomizing nozzles are installed at the top of the sealed spraying chamber. The tops of the high-pressure atomizing nozzles are connected to a high-pressure suction pump via a main spraying pipe. The high-pressure suction pump is connected to a spraying material container located in a spraying material chamber above the sealed spraying chamber. The bottoms of the high-pressure atomizing nozzles are connected to a material recovery chamber. The bottom of the material recovery chamber is connected to a coating recovery pump located at the top of the spraying material chamber and connected to the spraying material container at its bottom. The material addition pipeline is connected, and a partition plate with a through hole pipe in the middle is set on one side of the output end of the sealed spraying chamber. A rapid air drying chamber is set on the outside of the partition plate. A heating element installation chamber with an electric heater is set at the bottom of the rapid air drying chamber. The output end of the electric heater is connected to the heating coil installed in the rapid air drying chamber. An air inlet grid plate is set on the side wall of the rapid air drying chamber. An exhaust fan is set on the top of the rapid air drying chamber. A material discharge limiting sleeve corresponding to the spraying limiting sleeve and the through hole pipe is set at the center of the outer side wall of the rapid air drying chamber.

[0008] The discharge rotary receiving device includes a receiving support frame with a transverse receiving and feeding groove in the middle. A receiving electrically controlled track trolley with a receiving rotary motor is set on the top of the receiving support frame. A receiving rotary bracket fixedly connected to the receiving electrically controlled track trolley is installed at the output end of the receiving rotary motor. The bottom of the receiving rotary bracket extends into the transverse receiving and feeding groove. A receiving rotary shaft is mounted on the receiving rotary bracket located in the transverse receiving and feeding groove through a second bearing. A receiving sleeve that cooperates with the discharge limiting sleeve is fixedly installed at the output end of the receiving rotary shaft. The receiving rotary shaft is connected to the receiving rotary drive wheel installed on the output shaft of the receiving rotary motor through a receiving connecting belt.

[0009] The aforementioned protective coating system for the surface of communication cable protection pipes is characterized in that: the feeding support frame is a square block structure with a first track limiting groove on the top surface; the top of the transverse feeding trough is connected to the bottom of the first track limiting groove; the transverse feeding trough has a V-shaped groove structure; one side of the transverse feeding trough is connected to the top opening of the feeding channel; the groove depth of the transverse feeding trough on one side of the feeding channel is not greater than the groove depth of the transverse feeding trough on the other side; the storage bin is a square bin structure; the thickness of the storage bin matches the groove width of the feeding channel; a discharge bin is connected to the outer side of the storage bin; the inner side of the discharge bin is connected to the top side of the storage bin; the outer side of the discharge bin is connected to the bottom of the discharge port; the width of the discharge port is equal to the width of the discharge bin; the width of the discharge bin is equal to the width of the storage bin; and the thickness of the discharge port and the discharge bin is equal to the thickness of the storage bin.

[0010] The aforementioned protective coating system for the surface of communication cable protection pipes is characterized in that: the material lifting device includes a lifting connecting block connected to the outside of the material lifting plate; a lifting chain is fixedly installed on the top of the lifting connecting block; the top inner side of the lifting chain is fitted onto the outside of the lifting rotating gear; the bottom of the lifting rotating gear is installed on the lifting fixed bracket; a lifting running groove is provided on the outer side of the lifting fixed bracket; an electric lifting trolley is installed in the lifting running groove; the top of the electric lifting trolley is fixedly connected to the end of the lifting chain; the length of the storage bin is not greater than the length of the feeding support frame; the horizontal straight length between the outer end face of the storage bin and the outer end face of the feeding support frame is not less than the span of the electric control track trolley in the length direction; the bottom of the feeding rotating bracket is located above the bottom of the transverse feeding trough; the bottom of the feeding rotating shaft is located above the bottom of the transverse feeding trough; and the axis of the feeding sleeve and the center line of the depth of the transverse feeding trough are the same straight line.

[0011] The above-mentioned surface protective spraying system for communication cable protection pipes is characterized in that: the spraying limiting sleeve is a cylindrical tubular structure, the axis of the spraying limiting sleeve and the axis of the feeding sleeve are on the same straight line, the spraying limiting sleeve is located at the center position of the feeding direction of the sealed spraying chamber, several evenly distributed high-pressure atomizing nozzles with their output ends facing downwards are provided at the top centerline of the sealed spraying chamber, a transverse baffle is provided between the sealed spraying chamber and the spraying material chamber, a high-pressure suction pump is snapped and fixed at the center of the transverse baffle, the spraying material container is fixedly installed in the spraying material chamber through a side bracket, an observation window is provided on the outer side of the sealed spraying chamber, and a level gauge connected to the spraying material container is provided on the outer side of the spraying material chamber.

[0012] The aforementioned protective spraying system for the surface of communication cable protection pipes is characterized in that: the bottom of the material recovery chamber has a gradually narrowing arc structure; the circulating recovery pump is located at the center of the bottom of the material recovery chamber; guide blocks are arranged from top to bottom on the inner wall of the material recovery chamber; the top of the guide blocks is located below the sealed spraying chamber; the output direction of the high-pressure atomizing nozzle is downward; the bottom surface of the high-pressure atomizing nozzle is located above the plane where the top surface of the spraying limiting sleeve is located; the axis of the spraying limiting sleeve and the axis of the through-hole pipe are the same straight line; and the axis of the through-hole pipe and the axis of the discharge limiting sleeve are the same straight line.

[0013] The aforementioned communication cable protection pipe surface protective spraying system is characterized in that: the isolation plate extends from the top side of the sealed spraying chamber to the bottom side of the material recovery chamber; the through-hole pipe is a cylindrical tubular structure located at the center of the isolation plate; the rapid drying chamber is a chamber structure with a square cross-section; the heating coil extends from the inlet of the rapid drying chamber to the outlet; the heating coil is a single spiral coil structure; the inner ends of the heating coil are respectively connected to the through-hole pipe and the discharge limiting sleeve; the axis of the heating coil is the same straight line as the axis of the through-hole pipe and the discharge limiting sleeve; the bottom of the exhaust fan is connected to the top of the rapid drying chamber; the bottom of the exhaust fan is located at the center of the top of the heating coil; a dehumidification pipe is provided at the top of the exhaust fan; and a heating isolation baffle is provided between the rapid drying chamber and the heating component installation chamber.

[0014] The above-mentioned protective spraying system for the surface of the communication cable protection pipe is characterized in that: the receiving support frame is a square block structure with a second track limiting groove on the top surface; the top of the transverse receiving and feeding groove is connected to the bottom of the second track limiting groove; the transverse receiving and feeding groove has a V-shaped groove structure; the bottom of the receiving rotating bracket is located above the bottom of the transverse receiving and feeding groove; the bottom of the receiving rotating shaft is located above the bottom of the transverse receiving and feeding groove; the axis of the receiving sleeve is the same straight line as the center line of the depth of the transverse receiving and feeding groove; and the axis of the receiving sleeve is the same straight line as the axis of the discharge limiting sleeve, the through hole pipe, and the spraying limiting sleeve.

[0015] Meanwhile, this invention also discloses a simple and rationally designed method for protective spraying on the surface of communication cable protective tubes, characterized by the following steps:

[0016] Step 1: Loading the communication cable protection tube: Place the communication cable protection tube to be sprayed in the storage silo. When the spraying operation begins, start the material lifting device. The material lifting device drives the material lifting plate to rise. The material lifting plate drives the communication cable protection tube to be sprayed in the storage silo to rise along the inner wall of the storage silo and is loaded into the horizontal feeding chute through the loading channel. At this time, insert one end of the communication cable protection tube to be sprayed into the feeding sleeve and start the feeding electric control track trolley to move the other end of the communication cable protection tube to be sprayed into the spraying limit sleeve.

[0017] Step Two: Spraying the First Segment of the Communication Cable Protection Pipe: Start the feeding electrically controlled track trolley. The feeding track trolley travels a preset distance each time. As the feeding track trolley moves along the feeding support frame towards the sealed spraying chamber, the communication cable protection pipe to be sprayed, installed in the feeding sleeve, is dragged and moved horizontally. During this movement, both ends of the communication cable protection pipe are supported by the feeding sleeve and the spraying limiting sleeve. When the communication cable protection pipe enters the sealed spraying chamber, the feeding rotary motor starts, driving the feeding rotary drive wheel to rotate. The feeding rotary drive wheel drives the feeding connecting belt to rotate, which in turn drives the feeding rotary shaft to rotate within the first bearing. The feeding rotary shaft then drives the feeding... As the sleeve rotates, the high-pressure suction pump starts, spraying the paint from the spray material container onto the communication cable protection tube that is inserted into the sealed spray chamber through a high-pressure atomizing nozzle. As the communication cable protection tube rotates and continues to advance, a layer of paint is evenly sprayed onto the outside of the communication cable protection tube that is inserted into the sealed spray chamber. Excess paint that falls to the bottom of the material recovery chamber is sucked back into the paint addition pipe by the circulation recovery pump and finally returned to the spray material container for recycling. When the depth of the communication cable protection tube inserted into the sealed spray chamber reaches the length of the sealed spray chamber, the high-pressure suction pump stops operating.

[0018] Step 3: Rapid drying of the first section of the communication cable protection tube: The feeding electric control track trolley continues to move along the feeding support frame toward the sealing spraying chamber. The length of the movement is the length of a single spraying of the protection tube. During the movement of the feeding electric control track trolley, the sprayed protection tube enters the rapid drying chamber. After entering the rapid drying chamber, the length of the rapid drying chamber is equal to the length of the sealing spraying chamber. When one end of the sprayed protection tube reaches the position of the discharge limit sleeve, the feeding electric control track trolley stops running. At this time, the electric heater is turned on, and the heat energy after the set temperature is transferred to the heating coil through the electric heater. The heating coil is fitted on the outside of the already sprayed section of the protection tube. As the temperature rises and the drying operation proceeds, the exhaust fan is turned on to discharge the moisture.

[0019] Step 4: Spraying and rapid drying of the i-th segment of the communication cable protection tube: Start the feeding rotary motor, which drives the feeding drive wheel to rotate. The drive wheel rotates the feeding connecting belt, which in turn rotates the feeding shaft within the first bearing. The shaft then rotates the feeding sleeve. Simultaneously, the high-pressure suction pump starts, spraying the coating material from the material container through a high-pressure atomizing nozzle onto the communication cable protection tube inside the sealed spraying chamber. As the tube rotates and continues to advance, the coating is evenly applied to the outer surface of the tube inside the sealed spraying chamber. Excess paint that falls to the bottom of the material recovery bin is collected by the circulating recovery pump and returned to the paint addition pipe through the pipeline, and finally returned to the paint material container for recycling. After the outer layer of the i-th segment of the communication cable protection pipe is coated, the feeding electric control track trolley is opened, which drives the protection pipe to move continuously. During the movement, the i-th segment of the communication cable protection pipe enters the rapid drying chamber. One section of the dried protection pipe is output from the discharge limit sleeve and falls into the receiving sleeve. Here, i is the segment number of the communication cable protection pipe and i = 2, 3, ..., I-1, and I is the total number of segments of the communication cable protection pipe.

[0020] Step 5: Repeat Step 4 multiple times until the spraying and rapid drying of Section I-1 of the communication cable protection tube is completed.

[0021] Step Six: Spraying and Rapid Drying of the Last Segment of the Communication Cable Protection Pipe: After all the protection pipe on the feeding sleeve has been fed into the sealed spraying chamber, the other end of the protection pipe is rotated by the receiving sleeve. The receiving sleeve is rotated by the receiving rotating shaft, the receiving connecting belt, the receiving rotating drive wheel, and the receiving rotating motor. The tail section of the protection pipe that falls into the sealed spraying chamber is sprayed by a high-pressure atomizing nozzle in the sealed spraying chamber, and then enters the rapid drying chamber for drying in the next stage. Finally, the fully sprayed protection pipe is taken out of the rapid drying chamber by the receiving sleeve, completing the single-segment spraying operation of the protection pipe.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The system adopted in this invention is easy to operate, saves on the amount of spray paint, has high spraying efficiency, occupies a small area, has low overall equipment cost, saves human resources, has a high degree of automation, reduces the amount of equipment inside the spraying chamber, recycles waste spraying resources, avoids waste accumulation, has a unique feeding and support method, sprays thoroughly and completely, dries quickly, has high turnover efficiency, has a high degree of mechanization, and is easy to promote and use.

[0024] 2. The system employed in this invention utilizes a top-down, single-row spraying method within a sealed spraying chamber. An external rotating device drives the protective tube to rotate, ensuring uniform spraying. The system features a simple structure, directional operation within the spraying chamber, and the collection of excess spray paint is directly recycled at the bottom of the spraying chamber. This ingenious rotating mechanism ensures uniform spraying while recycling waste, preventing material accumulation and unusable conditions within the sealed spraying chamber. Furthermore, the segmented spraying method saves overall equipment floor space. The system employs an external rotating support device, combined with multi-end auxiliary supports, to complete the contact support operation before material feeding and spraying. After spraying begins, it performs a suspended rotation operation to ensure uniform and comprehensive spraying of every position on the protective tube. Simultaneously, during spraying of the tail end of the protective tube, directional operation is achieved through a material receiving rotating device, preventing wear on the already dried sprayed surface and fully realizing omnidirectional spraying of the protective tube. A separately designed heating, air drying, and dehumidification process enables rapid drying of the protective tube after spraying, facilitating rapid production turnover and improving production efficiency. Furthermore, the system automates material feeding and discharging, significantly enhancing overall production efficiency.

[0025] 3. The method adopted in this invention is simple in steps and closely integrated with system components, which greatly reduces the time for material transportation and discharge, and at the same time greatly improves the efficiency of equipment turnover. The whole process adopts a segmented spraying and drying method, and the operation of the whole spray pipe is completed with equipment that does not occupy too much space, which is convenient for promotion and use.

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main view structure of the system of the present invention.

[0028] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0029] Figure 3 This is a partial internal structural diagram of the material rotary conveying device of the present invention.

[0030] Figure 4 This is a partial internal structural diagram of the circulating spraying rapid drying device of the present invention.

[0031] Figure 5 This is a partial internal structural diagram of the material discharge rotary receiving device of the present invention.

[0032] Figure 6 for Figure 3A side view of a portion of the internal structure.

[0033] Figure 7 for Figure 4 Side view of a partial internal structure Figure 1 .

[0034] Figure 8 for Figure 4 Side view of a partial internal structure Figure 2 .

[0035] Figure 9 for Figure 5 A side view of a portion of the internal structure.

[0036] Figure 10 This is a flowchart of the method of the present invention. Detailed Implementation

[0037] like Figures 1 to 9 As shown, the communication cable protection pipe surface protective spraying system of the present invention includes a material rotary conveying device, a circulating spraying and rapid air drying device that cooperates with the material rotary conveying device, and a discharge rotary receiving device that cooperates with the circulating spraying and rapid air drying device.

[0038] The material rotary conveying device includes a feeding support frame 1 with a transverse feeding trough 9 in the middle. One side of the transverse feeding trough 9 is connected to a storage bin 2 located below the feeding support frame 1 via a feeding channel 10. The storage bin 2 is equipped with a material lifting plate 14 that moves up and down. The outer side of the material lifting plate 14 is connected to a material lifting device that is movably installed in a lifting groove on the side of the storage bin 2. The top of the feeding support frame 1 is equipped with a feeding electric control track trolley 4 with a feeding rotary motor 5. The output end of the feeding rotary motor 5 is equipped with a feeding rotary bracket 6 that is fixedly connected to the feeding electric control track trolley 4. The bottom of the feeding rotary bracket 6 extends into the transverse feeding trough 9. A feeding rotary shaft 20 is mounted on the feeding rotary bracket 6 located in the transverse feeding trough 9 via a first bearing 19. A feeding sleeve 21 is fixedly installed at the output end of the feeding rotary shaft 20. The feeding rotary shaft 20 is connected to the feeding rotary drive wheel 7 installed on the output shaft of the feeding rotary motor 5 via a feeding connecting belt 8.

[0039] The circulating spraying rapid drying device includes a sealed spraying chamber 22 connected to a feeding chamber 21 via a spraying limiting sleeve 25. Several high-pressure atomizing nozzles 36 are installed at the top of the sealed spraying chamber 22. The tops of the high-pressure atomizing nozzles 36 are connected to a high-pressure suction pump 34 via a main spraying pipe 35. The high-pressure suction pump 34 is connected to a spraying material container 33 located in a spraying material chamber 23 above the sealed spraying chamber 22. The bottoms of the high-pressure atomizing nozzles 36 are connected to a material recovery chamber 38. The bottom of the material recovery chamber 38 is connected to a paint additive container located at the top of the spraying material chamber 23 and connected to the spraying material container 33 via a circulating recovery pump 32. The spraying chamber 22 is connected to the pipe 27. A partition plate 39 with a through hole pipe 40 in the middle is provided on one side of the output end of the sealed spraying chamber 22. A rapid drying chamber 41 is provided on the outside of the partition plate 39. A heating element installation chamber 42 with an electric heater 43 is provided at the bottom of the rapid drying chamber 41. The output end of the electric heater 43 is connected to the heating coil 44 installed in the rapid drying chamber 41. An air inlet grid plate 31 is provided on the side wall of the rapid drying chamber 41. An exhaust fan 29 is provided on the top of the rapid drying chamber 41. A discharge limiting sleeve 26 corresponding to the spraying limiting sleeve 25 and the through hole pipe 40 is provided at the center of the outer side wall of the rapid drying chamber 41.

[0040] The discharge rotary receiving device includes a receiving support frame 46 with a transverse receiving and feeding trough 55 in the middle. A receiving electrically controlled track trolley 47 with a receiving rotary motor 48 is set on the top of the receiving support frame 46. A receiving rotary bracket 49 fixedly connected to the receiving electrically controlled track trolley 47 is installed at the output end of the receiving rotary motor 48. The bottom of the receiving rotary bracket 49 extends into the transverse receiving and feeding trough 55. A receiving rotary shaft 53 is mounted on the receiving rotary bracket 49 located in the transverse receiving and feeding trough 55 through a second bearing 52. A receiving sleeve 54 that cooperates with the discharge limiting sleeve 26 is fixedly installed at the output end of the receiving rotary shaft 53. The receiving rotary shaft 53 is connected to the receiving rotary drive wheel 50 installed on the output shaft of the receiving rotary motor 48 through a receiving connecting belt 51.

[0041] In this embodiment, the feeding support frame 1 is a square block structure with a first track limiting groove on the top surface. The top of the transverse feeding trough 9 is connected to the bottom of the first track limiting groove. The transverse feeding trough 9 has a V-shaped groove structure. One side of the transverse feeding trough 9 is connected to the top opening of the feeding channel 10. The groove depth of the transverse feeding trough 9 on one side of the feeding channel 10 is not greater than the groove depth of the transverse feeding trough 9 on the other side. The storage bin 2 is square. The storage bin 2 has a shaped structure, with its thickness matching the width of the feeding channel 10. A discharge bin 12 is connected to the outer side of the storage bin 2. The inner side of the discharge bin 12 is connected to the top side of the storage bin 2, and the outer side of the discharge bin 12 is connected to the bottom of the discharge port 11. The width of the discharge port 11 is equal to the width of the discharge bin 12, and the width of the discharge bin 12 is equal to the width of the storage bin 2. The thickness of the discharge port 11 and the discharge bin 12 is equal to the thickness of the storage bin 2.

[0042] In this embodiment, the material lifting device includes a lifting connecting block 13 connected to the outside of the material lifting plate 14. A lifting chain 16 is fixedly installed on the top of the lifting connecting block 13. The top inner side of the lifting chain 16 is fitted onto the outside of the lifting rotating gear 15. The bottom of the lifting rotating gear 15 is installed on the lifting fixed bracket 3. A lifting running groove 18 is opened on the outer side of the lifting fixed bracket 3. An electric lifting trolley 17 is installed in the lifting running groove 18. The top of the electric lifting trolley 17 is fixedly connected to the end of the lifting chain 16. The length of the storage bin 2 is not greater than the length of the feeding support frame 1. The horizontal straight length between the outer end face of the storage bin 2 and the outer end face of the feeding support frame 1 is not less than the span of the electric control track trolley 4 in the length direction. The bottom of the feeding rotating bracket 6 is located above the bottom of the transverse feeding trough 9. The bottom of the feeding rotating shaft 20 is located above the bottom of the transverse feeding trough 9. The axis of the feeding sleeve 21 and the center line of the depth of the transverse feeding trough 9 are the same straight line.

[0043] In this embodiment, the spraying limiting sleeve 25 is a cylindrical tubular structure. The axis of the spraying limiting sleeve 25 and the axis of the feed sleeve 21 are on the same straight line. The spraying limiting sleeve 25 is located at the center of the feed direction of the sealed spraying chamber 22. Several equally distributed high-pressure atomizing nozzles 36 with their output ends facing downwards are provided at the top centerline of the sealed spraying chamber 22. A transverse baffle 45 is provided between the sealed spraying chamber 22 and the spraying material chamber 23. The high-pressure suction pump 34 is snapped and fixed at the center of the transverse baffle 45. The spraying material container 33 is fixedly installed in the spraying material chamber 23 by a side bracket. An observation window 30 is provided on the outer side of the sealed spraying chamber 22. A level gauge 24 connected to the spraying material container 33 is provided on the outer side of the spraying material chamber 23.

[0044] In this embodiment, the bottom of the material recovery chamber 38 has a gradually narrowing arc structure. The circulating recovery pump 32 is located at the center of the bottom of the material recovery chamber 38. The inner wall of the material recovery chamber 38 is provided with guide blocks 37 distributed from top to bottom. The top of the guide blocks 37 is located below the sealed spraying chamber 22. The output direction of the high-pressure atomizing nozzle 36 is downward. The bottom surface of the high-pressure atomizing nozzle 36 is located above the plane where the top surface of the spraying limiting sleeve 25 is located. The axis of the spraying limiting sleeve 25 and the axis of the through hole pipe 40 are the same straight line. The axis of the through hole pipe 40 and the axis of the discharge limiting sleeve 26 are the same straight line.

[0045] In this embodiment, the isolation plate 39 extends from the top side of the sealed spraying chamber 22 to the bottom side of the material recovery chamber 38. The through-hole pipe 40 is a cylindrical tubular structure located at the center of the isolation plate 39. The rapid drying chamber 41 is a chamber structure with a square cross-section. The heating coil 44 extends from the inlet of the rapid drying chamber 41 to the outlet. The heating coil 44 is a single spiral coil structure. The two ends of the inner side of the heating coil 44 are connected to the through-hole pipe 40 and the discharge limiting sleeve 26, respectively. The axis of the heating coil 44 is the same straight line as the axis of the through-hole pipe 40 and the discharge limiting sleeve 26. The bottom of the exhaust fan 29 is connected to the top of the rapid drying chamber 41. The bottom of the exhaust fan 29 is located at the center of the top of the heating coil 44. A dehumidification pipe 28 is provided on the top of the exhaust fan 29. A heating isolation baffle is provided between the rapid drying chamber 41 and the heating component installation chamber 42.

[0046] In this embodiment, the receiving support frame 46 is a square block structure with a second track limiting groove on the top surface. The top of the transverse receiving and feeding groove 55 is connected to the bottom of the second track limiting groove. The transverse receiving and feeding groove 55 has a V-shaped groove structure. The bottom of the receiving rotating bracket 49 is located above the bottom of the transverse receiving and feeding groove 55. The bottom of the receiving rotating shaft 53 is located above the bottom of the transverse receiving and feeding groove 55. The axis of the receiving sleeve 54 is the same straight line as the center line of the depth of the transverse receiving and feeding groove 55. The axis of the receiving sleeve 54 is the same straight line as the axis of the discharge limiting sleeve 26, the through hole pipe 40, and the spraying limiting sleeve 25.

[0047] like Figure 10 The method for applying a protective coating to the surface of a communication cable protection tube, as shown, includes the following steps:

[0048] Step 1: Loading the communication cable protection tube: Place the communication cable protection tube to be sprayed in the storage bin 2. When the spraying operation begins, start the material lifting device. The material lifting device drives the material lifting plate 14 to rise. The material lifting plate 14 drives the communication cable protection tube to be sprayed in the storage bin 2 to rise along the inner wall of the storage bin 2 and is loaded into the horizontal feeding trough 9 through the loading channel 10. At this time, insert one end of the communication cable protection tube to be sprayed into the feeding sleeve 21 and start the feeding electric control track trolley 4 to move the other end of the communication cable protection tube to be sprayed into the spraying limit sleeve 25.

[0049] Step 2: Spraying the first section of the communication cable protection tube: Start the feeding electrically controlled track trolley 4. The feeding electrically controlled track trolley 4 travels a preset distance each time. When the feeding electrically controlled track trolley 4 moves along the feeding support frame 1 towards the sealed spraying chamber 22, the communication cable protection tube to be sprayed, installed in the feeding sleeve 21, is dragged and moved horizontally. During the horizontal movement, both ends of the communication cable protection tube to be sprayed are supported by the feeding sleeve 21 and the spraying limiting sleeve 25. When the communication cable protection tube to be sprayed enters the sealed spraying chamber 22, the feeding rotary motor 5 is turned on. The feeding rotary motor 5 drives the feeding rotary drive wheel 7 to rotate, the feeding rotary drive wheel 7 drives the feeding connecting belt 8 to rotate, the feeding connecting belt 8 drives the feeding rotary shaft 20 to rotate within the first bearing 19, and the feeding rotary shaft 20 drives the feeding sleeve... As pipe 21 rotates, high-pressure suction pump 34 starts. High-pressure suction pump 34 sprays the paint material in spray material container 33 onto the communication cable protection pipe to be sprayed, which is inserted into the sealed spraying chamber 22, through high-pressure atomizing nozzle 36. As the communication cable protection pipe to be sprayed rotates and continues to advance, a layer of paint material is evenly sprayed on the outside of the communication cable protection pipe to be sprayed, which is inserted into the sealed spraying chamber 22. Excess paint material falling to the bottom of material recovery chamber 38 is recovered through the pipeline to paint addition pipeline 27 under the suction of circulation recovery pump 32, and finally recovered into spray material container 33 for recycling. When the depth of the communication cable protection pipe to be sprayed in the sealed spraying chamber 22 reaches the length of the sealed spraying chamber 22, high-pressure suction pump 34 stops operating.

[0050] Step 3: Rapid air drying of the first section of the communication cable protection tube: The feeding electric control track trolley 4 continues to move along the feeding support frame 1 toward the sealing spraying chamber 22. The length of the movement is the length of a single spraying of the protection tube. During the movement of the feeding electric control track trolley 4, the sprayed protection tube enters the rapid air drying chamber 41. After entering the rapid air drying chamber 41, the length of the rapid air drying chamber 41 is equal to the length of the sealing spraying chamber 22. When one end of the sprayed protection tube reaches the position of the discharge limit sleeve 26, the feeding electric control track trolley 4 stops running. At this time, the electric heater 43 is turned on. The heat energy after the set temperature is transferred to the heating coil 44 through the electric heater 43. The heating coil 44 is fitted on the outside of the already sprayed section of the protection tube. As the temperature rises and the drying operation proceeds, the exhaust fan 29 is turned on to discharge the moisture.

[0051] Step 4: Spraying and rapid drying of the i-th segment of the communication cable protection tube: Start the feeding rotary motor 5. The feeding rotary motor 5 drives the feeding rotary drive wheel 7 to rotate, which in turn drives the feeding connecting belt 8 to rotate. The feeding connecting belt 8 drives the feeding rotary shaft 20 to rotate within the first bearing 19, and the feeding rotary shaft 20 drives the feeding sleeve 21 to rotate. Simultaneously, the high-pressure suction pump 34 starts, spraying the coating material from the spraying material container 33 through the high-pressure atomizing nozzle 36 onto the communication cable protection tube to be coated, which extends into the sealed spraying chamber 22. As the communication cable protection tube rotates and continues to advance, the outer surface of the communication cable protection tube extending into the sealed spraying chamber 22 is coated. A layer of paint is evenly sprayed on the material. Excess paint that falls to the bottom of the material recovery bin 38 is recovered through the pipeline to the paint addition pipeline 27 by the suction of the circulation recovery pump 32, and finally recovered into the spray material container 33 for recycling. When the outer layer of the i-th segment of the communication cable protection pipe is completed, the feeding electric control track trolley 4 is opened, driving the protection pipe to move continuously. During the movement, the i-th segment of the communication cable protection pipe enters the rapid drying bin 41. A section of the dried protection pipe is output from the discharge limit sleeve 26 and falls into the receiving sleeve 54. Here, i is the segment number of the communication cable protection pipe and i = 2, 3, ..., I-1, and I is the total number of segments of the communication cable protection pipe.

[0052] Step 5: Repeat Step 4 multiple times until the spraying and rapid drying of Section I-1 of the communication cable protection tube is completed.

[0053] Step Six: Spraying and Rapid Drying of the Last Segment of the Communication Cable Protection Pipe: After the protection pipe on the feeding sleeve 21 is completely fed into the sealed spraying chamber 22, the other end of the protection pipe is rotated by the receiving sleeve 54. The receiving sleeve 54 is rotated by the receiving rotating shaft 53, the receiving connecting belt 51, the receiving rotating drive wheel 50, and the receiving rotating motor 48. The tail section of the protection pipe that falls into the sealed spraying chamber 22 is sprayed by the high-pressure atomizing nozzle 36 in the sealed spraying chamber 22, and then enters the rapid drying chamber 41 for drying in the next stage. Finally, the fully sprayed protection pipe is taken out of the rapid drying chamber 41 by the receiving sleeve 54, completing the single-segment spraying operation of the protection pipe.

[0054] In use, this invention employs a top-down, single-row spraying method within a sealed spraying chamber. An external rotating device drives the protective tube to rotate, ensuring uniform spraying. The structure is simple, with directional operation within the spraying chamber. Excess spray paint is directly recycled at the bottom of the spraying chamber. The ingenious rotating mechanism ensures uniform spraying while recycling waste, preventing material accumulation and unusable conditions within the sealed spraying chamber. Furthermore, the segmented spraying method saves overall equipment floor space. An external rotating support device, in conjunction with a multi-end auxiliary support structure, completes the contact support operation before material feeding and spraying. After the spraying operation begins, a suspended rotation operation is implemented to ensure uniform and comprehensive spraying of every position on the protective tube. Simultaneously, during the spraying of the tail end of the protective tube, directional operation is achieved through a material receiving rotating device, preventing wear on the already dried sprayed surface and fully realizing all-around spraying of the protective tube. A separately designed heating, air drying, and dehumidification operation enables rapid drying of the protective tube after spraying, facilitating rapid production turnover and improving production efficiency. Furthermore, the system automates material feeding and discharging, significantly improving overall production efficiency. The method is simple, and the method is closely integrated with system components, greatly reducing material handling and discharging time while significantly improving the equipment's reusability. The entire system adopts a segmented spraying and drying method, using space-saving equipment to complete the operation of the entire spray tube.

[0055] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A protective coating system for the surface of a communication cable protection pipe, characterized in that: It includes a material rotary conveyor, a circulating spraying and rapid air drying device that works in conjunction with the material rotary conveyor, and a discharge rotary receiving device that works in conjunction with the circulating spraying and rapid air drying device. The material rotary conveying device includes a feeding support frame (1) with a transverse feeding chute (9) in the middle. One side of the transverse feeding chute (9) is connected to a storage silo (2) located below the feeding support frame (1) via a feeding channel (10). A material lifting plate (14) that moves up and down is installed inside the storage silo (2). The outer side of the material lifting plate (14) is connected to a material lifting device that is movably installed in a lifting chute on the side of the storage silo (2). A feeding electrically controlled track trolley (4) with a feeding rotary motor (5) is installed on the top of the feeding support frame (1). The output end of the rotary motor (5) is equipped with a feeding rotary bracket (6) that is fixedly connected to the feeding electric control track trolley (4). The bottom of the feeding rotary bracket (6) extends into the transverse feeding trough (9). The feeding rotary bracket (6) located in the transverse feeding trough (9) is fitted with a feeding rotary shaft (20) through a first bearing (19). The output end of the feeding rotary shaft (20) is fixedly installed with a feeding sleeve (21). The feeding rotary shaft (20) is connected to the feeding rotary drive wheel (7) installed on the output shaft of the feeding rotary motor (5) through a feeding connecting belt (8). The circulating spraying rapid drying device includes a sealed spraying chamber (22) connected to the feeding chamber (21) via a spraying limiting sleeve (25). Several high-pressure atomizing nozzles (36) are installed at the top of the sealed spraying chamber (22). The top of each high-pressure atomizing nozzle (36) is connected to a high-pressure suction pump (34) via a main spraying pipe (35). The high-pressure suction pump (34) is connected to a spraying material container (33) located in a spraying material chamber (23) above the sealed spraying chamber (22). The bottom of each high-pressure atomizing nozzle (36) is connected to a material recovery chamber (38). The bottom of the material recovery chamber (38) is connected to a paint addition pipe located at the top of the spraying material chamber (23) and connected to the spraying material container (33) via a circulating recovery pump (32). The channels (27) are connected. A partition plate (39) with a through hole pipe (40) in the middle is provided on one side of the output end of the sealed spraying chamber (22). A fast air drying chamber (41) is provided on the outside of the partition plate (39). A heating element installation chamber (42) with an electric heater (43) is provided at the bottom of the fast air drying chamber (41). The output end of the electric heater (43) is connected to the heating coil (44) installed in the fast air drying chamber (41). An air inlet grid plate (31) is provided on the side wall of the fast air drying chamber (41). An exhaust fan (29) is provided on the top of the fast air drying chamber (41). A discharge limiting sleeve (26) corresponding to the spraying limiting sleeve (25) and the through hole pipe (40) is provided at the center of the outer side wall of the fast air drying chamber (41). The discharge rotary receiving device includes a receiving support frame (46) with a transverse receiving and feeding groove (55) in the middle. A receiving electric control track trolley (47) with a receiving rotary motor (48) is set on the top of the receiving support frame (46). A receiving rotary bracket (49) fixedly connected to the receiving electric control track trolley (47) is installed at the output end of the receiving rotary motor (48). The bottom of the receiving rotary bracket (49) extends into the transverse receiving and feeding groove (55). A receiving rotary shaft (53) is mounted on the receiving rotary bracket (49) located in the transverse receiving and feeding groove (55) through a second bearing (52). A receiving sleeve (54) that cooperates with the discharge limiting sleeve (26) is fixedly installed at the output end of the receiving rotary shaft (53). The receiving rotary shaft (53) is connected to the receiving rotary drive wheel (50) installed on the output shaft of the receiving rotary motor (48) through a receiving connecting belt (51).

2. The surface protective spraying system for communication cable protection pipes according to claim 1, characterized in that: The feeding support frame (1) is a square block structure with a first track limiting groove on the top surface. The top of the transverse feeding trough (9) is connected to the bottom of the first track limiting groove. The transverse feeding trough (9) has a V-shaped groove structure. One side of the transverse feeding trough (9) is connected to the top opening of the feeding channel (10). The groove depth of the transverse feeding trough (9) on one side of the feeding channel (10) is not greater than the groove depth of the transverse feeding trough (9) on the other side. The storage bin (2) is a square bin structure. The thickness of (2) matches the width of the feeding channel (10). A discharge bin (12) is connected to the outer side of the storage bin (2). The inner side of the discharge bin (12) is connected to the top side of the storage bin (2). The outer side of the discharge bin (12) is connected to the bottom of the discharge port (11). The width of the discharge port (11) is equal to the width of the discharge bin (12). The width of the discharge bin (12) is equal to the width of the storage bin (2). The thickness of the discharge port (11) and the discharge bin (12) is equal to the thickness of the storage bin (2).

3. The surface protective spraying system for communication cable protection pipes according to claim 1, characterized in that: The material lifting device includes a lifting connecting block (13) connected to the outside of the material lifting plate (14). A lifting chain (16) is fixedly installed on the top of the lifting connecting block (13). The top inner side of the lifting chain (16) is fitted onto the outside of the lifting rotary gear (15). The bottom of the lifting rotary gear (15) is installed on the lifting fixed bracket (3). A lifting running groove (18) is provided on the outer side of the lifting fixed bracket (3). An electric lifting trolley (17) is installed in the lifting running groove (18). The top of the electric lifting trolley (17) is connected to the lifting chain. The end of the strip (16) is fixedly connected. The length of the storage bin (2) is not greater than the length of the feeding support frame (1). The horizontal length of the straight line between the outer end face of the storage bin (2) and the outer end face of the feeding support frame (1) is not less than the span of the feeding electric control track trolley (4) in the length direction. The bottom of the feeding rotating bracket (6) is located above the bottom of the transverse feeding trough (9). The bottom of the feeding rotating shaft (20) is located above the bottom of the transverse feeding trough (9). The axis of the feeding sleeve (21) and the center line of the depth of the transverse feeding trough (9) are the same straight line.

4. The surface protective spraying system for communication cable protection pipes according to claim 1, characterized in that: The spraying limiting sleeve (25) is a cylindrical tubular structure. The axis of the spraying limiting sleeve (25) and the axis of the feed sleeve (21) are on the same straight line. The spraying limiting sleeve (25) is located at the center of the feed direction of the sealed spraying chamber (22). Several equally distributed high-pressure atomizing nozzles (36) with their output ends facing downwards are provided at the top center line of the sealed spraying chamber (22). A transverse baffle (45) is provided between the sealed spraying chamber (22) and the spraying material chamber (23). The high-pressure suction pump (34) is snapped and fixed at the center of the transverse baffle (45). The spraying material container (33) is fixedly installed in the spraying material chamber (23) by the side bracket. An observation window (30) is provided on the outer side of the sealed spraying chamber (22). A level gauge (24) connected to the spraying material container (33) is provided on the outer side of the spraying material chamber (23).

5. The surface protective spraying system for communication cable protection pipes according to claim 1, characterized in that: The bottom of the material recovery chamber (38) has a gradually narrowing arc structure. The circulating recovery pump (32) is located at the center of the bottom of the material recovery chamber (38). The inner wall of the material recovery chamber (38) is provided with guide blocks (37) distributed from top to bottom. The top of the guide blocks (37) is located below the sealed spraying chamber (22). The output direction of the high-pressure atomizing nozzle (36) is vertically downward. The bottom surface of the high-pressure atomizing nozzle (36) is located above the plane where the top surface of the spraying limiting sleeve (25) is located. The axis of the spraying limiting sleeve (25) and the axis of the through hole pipe (40) are the same straight line. The axis of the through hole pipe (40) and the axis of the discharge limiting sleeve (26) are the same straight line.

6. The surface protective spraying system for communication cable protection pipes according to claim 1, characterized in that: The isolation plate (39) extends from the top side of the sealed spraying chamber (22) to the bottom side of the material recovery chamber (38). The through-hole pipe (40) is a cylindrical tubular structure, located at the center of the isolation plate (39). The rapid drying chamber (41) is a chamber structure with a square cross-section. The heating coil (44) extends from the inlet of the rapid drying chamber (41) to the outlet. The heating coil (44) is a single spiral coil structure, with its inner ends connected to the through-hole pipe. (40) and the discharge limiting sleeve (26) are connected. The axis of the heating coil (44) and the axis of the through hole pipe (40) and the discharge limiting sleeve (26) are all on the same straight line. The bottom of the exhaust fan (29) is connected to the top of the rapid drying chamber (41). The bottom of the exhaust fan (29) is located at the center of the top of the heating coil (44). A dehumidification pipe (28) is provided at the top of the exhaust fan (29). A heating isolation baffle is provided between the rapid drying chamber (41) and the heating element installation chamber (42).

7. The surface protective spraying system for communication cable protection pipes according to claim 1, characterized in that: The receiving support frame (46) is a square block structure with a second track limiting groove on the top surface. The top of the transverse receiving and feeding groove (55) is connected to the bottom of the second track limiting groove. The transverse receiving and feeding groove (55) has a V-shaped groove structure. The bottom of the receiving rotating bracket (49) is located above the bottom of the transverse receiving and feeding groove (55). The bottom of the receiving rotating shaft (53) is located above the bottom of the transverse receiving and feeding groove (55). The axis of the receiving sleeve (54) is the same straight line as the center line of the depth of the transverse receiving and feeding groove (55). The axis of the receiving sleeve (54) is the same straight line as the axis of the discharge limiting sleeve (26), the through hole pipe (40), and the spraying limiting sleeve (25).

8. A method for applying protective spraying to the surface of a communication cable protective conduit using the system as described in claim 1, characterized in that: The method includes the following steps: Step 1, Loading the communication cable protection tube: Place the communication cable protection tube to be sprayed in the storage bin (2). When the spraying operation starts, start the material lifting device. The material lifting device drives the material lifting plate (14) to rise. The material lifting plate (14) drives the communication cable protection tube to be sprayed in the storage bin (2) to rise along the inner wall of the storage bin (2) and load it into the horizontal feeding trough (9) through the loading channel (10). At this time, insert one end of the communication cable protection tube to be sprayed into the feeding sleeve (21) and start the feeding electric control track trolley (4) to drive the other end of the communication cable protection tube to be sprayed into the spraying limit sleeve (25). Step 2, Spraying operation of the first section of the communication cable protection pipe: Start the feeding electric control track trolley (4). The feeding electric control track trolley (4) has a preset travel length each time. When the feeding electric control track trolley (4) moves along the feeding support frame (1) toward the sealed spraying chamber (22), the communication cable protection pipe to be sprayed installed in the feeding sleeve (21) is dragged and moved horizontally. During the horizontal movement, the two ends of the communication cable protection pipe to be sprayed are supported by the feeding sleeve (21) and the spraying limit sleeve (25). When the communication cable protection pipe to be sprayed enters the sealed spraying chamber (22), the feeding rotary motor (5) is turned on. The feeding rotary motor (5) drives the feeding rotary drive wheel (7) to rotate. The feeding rotary drive wheel (7) drives the feeding connecting belt (8) to rotate. The feeding connecting belt (8) drives the feeding rotary shaft (20) to rotate in the first bearing (19). The feeding rotary shaft (20) carries The feed sleeve (21) rotates, and at the same time, the high-pressure suction pump (34) starts. The high-pressure suction pump (34) sprays the paint in the spray material container (33) onto the communication cable protection tube that is to be sprayed in the sealed spray chamber (22) through the high-pressure atomizing nozzle (36). As the communication cable protection tube to be sprayed rotates and continues to advance, a layer of paint is evenly sprayed on the outside of the communication cable protection tube that is to be sprayed in the sealed spray chamber (22). The excess paint that falls to the bottom of the material recovery chamber (38) is recovered through the pipeline to the paint addition pipeline (27) under the suction of the circulation recovery pump (32), and finally recovered into the spray material container (33) for recycling. When the depth of the communication cable protection tube that is to be sprayed in the sealed spray chamber (22) reaches the length of the sealed spray chamber (22), the high-pressure suction pump (34) stops operating. Step 3: Rapid air drying of the first section of the communication cable protection tube: The feeding electric control track trolley (4) moves along the feeding support frame (1) toward the sealing spraying chamber (22). The length of the movement is the length of a single spraying of the protection tube. During the movement of the feeding electric control track trolley (4), the sprayed protection tube enters the rapid air drying chamber (41). After entering the rapid air drying chamber (41), the length of the rapid air drying chamber (41) is equal to the length of the sealing spraying chamber (22). When one end of the sprayed protection tube reaches the position of the discharge limit sleeve (26), the feeding electric control track trolley (4) stops running. At this time, the electric heater (43) is turned on. The heat energy after the set temperature is transferred to the heating coil (44) through the electric heater (43). The heating coil (44) is fitted on the outside of the already sprayed section of the protection tube. As the temperature rises and the drying operation proceeds, the exhaust fan (29) is turned on to discharge the moisture. Step 4: Spraying and rapid drying of the i-th segment of the communication cable protection pipe: The feeding rotary motor (5) is turned on, driving the feeding rotary drive wheel (7) to rotate. The feeding rotary drive wheel (7) drives the feeding connecting belt (8) to rotate, which in turn drives the feeding rotary shaft (20) to rotate within the first bearing (19). The feeding rotary shaft (20) drives the feeding sleeve (21) to rotate. Simultaneously, the high-pressure suction pump (34) is started, spraying the coating material from the spraying material container (33) through the high-pressure atomizing nozzle (36) onto the communication cable protection pipe to be sprayed, which extends into the sealed spraying chamber (22). As the communication cable protection pipe to be sprayed rotates and continues to advance, the coating material extends into the sealed spraying chamber (22). A layer of paint is evenly sprayed on the outside of the cable protection pipe. Excess paint that falls to the bottom of the material recycling bin (38) is recycled to the paint addition pipe (27) through the pipe by the suction of the circulating recycling pump (32), and finally recycled to the spray material container (33) for recycling. When the outer layer of the i-th section of the communication cable protection pipe is sprayed, the feeding electric control track trolley (4) is opened, driving the protection pipe to move continuously. During the movement, the i-th section of the communication cable protection pipe enters the rapid drying bin (41). One section of the dried protection pipe is output from the discharge limiting sleeve (26) and falls into the receiving sleeve (54). Here, i is the segment number of the communication cable protection pipe and i=2,3,...,I-1, I is the total number of segments of the communication cable protection pipe. Step 5: Repeat Step 4 multiple times until the spraying and rapid drying of Section I-1 of the communication cable protection tube is completed. Step 6: Spraying and rapid drying of the last section of the communication cable protection tube: After the protection tube on the feeding sleeve (21) is finally fed into the sealed spraying chamber (22), the other end of the protection tube is driven to rotate by the receiving sleeve (54). The receiving sleeve (54) is driven to rotate by the receiving rotating shaft (53), the receiving connecting belt (51), the receiving rotating drive wheel (50) and the receiving rotating motor (48). The tail section of the protection tube that falls into the sealed spraying chamber (22) is sprayed by the high-pressure atomizing nozzle (36) in the sealed spraying chamber (22), and then enters the rapid drying chamber (41) in the next stage to carry out the drying operation. Finally, the fully sprayed protection tube is taken out of the rapid drying chamber (41) by the receiving sleeve (54) to complete the single-tube spraying operation of the protection tube.

Images