A corrosion-resistant coating device for sucker rod production

Abstract

This invention relates to an anti-corrosion coating device for sucker rod production, comprising a frame and a guiding spraying mechanism. A set of drive frames are symmetrically arranged on the left and right sides above the frame. Each drive frame has an end positioning mechanism installed inside. The end positioning mechanism is controlled by the drive frames to position the inner wall of the sucker rod end. The end positioning mechanism utilizes a pneumatic brake mechanism for rapid and reliable braking of the shaft end. A movable frame is arranged inside the frame. Above the front of the movable frame is a guiding spraying mechanism aligned with the central axis of the end positioning mechanism. The movable frame is driven by a power frame to move the guiding spraying mechanism along the horizontal axis of the sucker rod for spraying operations. This, combined with an outer wall cleaning scraper mechanism and an outer wall spraying cleaning mechanism located on the left and right sides of the guiding spraying mechanism, enables pre- and post-spraying treatment of the sucker rod's outer wall. This invention has the advantages of simple and reasonable structure, achieving all-around uniform spraying, rapid pre- and post-spraying treatment, and high work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of sucker rod coating technology, specifically relating to a device for coating sucker rods with anti-corrosion liquid. Background Technology

[0002] When using a rod pump to start oil production, the sucker rod will continuously reciprocate within the wellbore, leading to uneven wear. In the same area of ​​uneven wear, the sucker rod is more severely corroded. Spraying an anti-corrosion coating on the surface of the sucker rod can provide excellent protection, preventing external corrosive substances from contacting the metal. In traditional anti-corrosion spraying processes, the sucker rod needs to be supported by a bracket and the surface coating is applied by rotating the spray gun. Therefore, the existing process relies on multiple sets of brackets (such as arc brackets, V-shaped rollers, and cantilever brackets) to fix the sucker rod. However, the contact area between the bracket and the rod (the contact area accounts for about 5%-8% of the total surface area) cannot be covered by the spray gun due to physical obstruction, forming a corrosion blind spot. This corrosion blind spot needs to be manually touched up or treated with a second spray. The touch-up time for a single sucker rod accounts for as much as 20%-30%, resulting in a decrease in overall processing efficiency. To address this issue, CN120094783B discloses a surface treatment anti-corrosion spraying device for sucker rods, comprising a frame, an anti-corrosion liquid tank, a horizontal pipe, a spray head, and several supports. Each support has a triangular plate mounted above it, with the bottom surface of the triangular plate being horizontal and the top surface being inclined. A linear drive element is mounted on the frame, and a slider is connected to the telescopic end of the linear drive element. A groove is provided on the top surface of the triangular plate, and the slider and groove are slidably connected. The end faces of the slider and groove are connected by a return spring. An upper brush is connected to the bottom surface of the triangular plate. The surface of the support is concave and a lower brush is connected to the surface of the support. The anti-corrosion liquid tank delivers the anti-corrosion liquid through pipes into the lower and upper brushes. In use, the upper brush cotton presses down on the sucker rod and pushes it to rotate. The upper and lower brush cotton coat the contact area between the sucker rod and the support, ensuring that the sucker rod receives all-around anti-corrosion spraying. However, this technical solution has the following problems: when the upper brush cotton presses down on the sucker rod and pushes it to rotate, relative movement may occur between the upper brush cotton and the sucker rod, causing "slippage" and preventing the sucker rod from rotating smoothly, thus preventing all-around spraying. Moreover, there is no timely treatment before and after spraying the sucker rod, resulting in reduced spraying effect due to dirt on the sucker rod surface before spraying, and easy leakage of excess anti-corrosion liquid after spraying, which can easily pollute the workshop environment if not treated. In addition, this patent requires multiple sets of triangular plates (upper brush cotton) and supports (lower brush cotton) to be set according to the length of the sucker rod, making the structure relatively complex. Therefore, it is very necessary to provide an anti-corrosion liquid coating device for sucker rod production that has a simple and reasonable structure, achieves all-around uniform spraying, spraying progress indication, rapid pre- and post-spraying treatment, and high work efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a simple and reasonable structure, which enables all-round uniform spraying, spraying progress indication, rapid pre- and post-spraying treatment, and high working efficiency for the production of sucker rods.

[0004] The objective of this invention is achieved as follows: A corrosion-resistant coating device for sucker rod production includes a frame and a guiding spraying mechanism. A set of drive frames are symmetrically arranged on the left and right sides above the frame, and the drive frames are laterally slidably connected to the frame. An end positioning mechanism is installed inside each drive frame. The end positioning mechanism uses the drive frames as a power source to control its deployment and positions the inner wall of the sucker rod end. The end positioning mechanism utilizes a pneumatic brake mechanism located outside the drive frames to quickly and reliably brake the shaft end penetrating the drive frames. A movable frame is arranged inside the frame. A guiding spraying mechanism, aligned horizontally with the central axis of the end positioning mechanism, is arranged above the front of the movable frame. The guiding spraying mechanism is connected to the movable frame via a connecting assembly. An outer wall cleaning scraper mechanism and an outer wall spraying cleaning mechanism are respectively arranged on its left and right sides. The movable frame uses a power frame located on one side as a power source to drive the guiding spraying mechanism to move along the horizontal axis of the sucker rod for spraying operations. This, in conjunction with the outer wall cleaning scraper mechanism and the outer wall spraying cleaning mechanism, enables pre- and post-spraying treatment operations on the outer wall of the sucker rod.

[0005] In this invention, a support base is provided on the outer side of the frame, and a hinge base is installed on the upper part of the support base. A push-pull cylinder is installed on the hinge base and connected to the drive frame. Tracks are provided on both sides of the lower surface of the frame corresponding to the drive frame. The bottom surface of the drive frame is slidably connected to the corresponding track through a slide block. A servo motor is provided inside the lower part of the drive frame. A reducer is connected in series with the servo motor. The output shaft of the reducer is connected to an output sprocket. The output sprocket is connected to a driven sprocket. A mechanical pull rod type drum brake assembly is installed on one end of the reducer's output shaft that passes through the output sprocket.

[0006] Specifically, since the push-pull cylinder is connected to the drive frame, and the drive frame is connected to the frame via a slide and rail, the push-pull cylinder can push the drive frame to move on the rail on the frame using the slide. This allows a group of drive frames symmetrically arranged on the frame to move away from or closer to each other. The distance between the end positioning mechanisms at both ends can be adjusted according to the actual length of the sucker rod, making it suitable for double-end positioning operations of sucker rods of different lengths. By adjusting the movement of the drive frame, the length of the end positioning mechanism extending into the sucker rod can also be adjusted. This allows for comprehensive consideration of factors such as the length and weight of the sucker rod to adjust the length of the end positioning mechanism extending into the sucker rod, achieving a more suitable positioning force and positioning effect.

[0007] Furthermore, mechanical lever-type drum brake assemblies are existing technology. Here, one feasible structure is described. The mechanical lever-type drum brake assembly includes an arc-shaped drum brake device (e.g., a semi-circular structure) located above the output shaft of the reducer. The drum brake device contains brake pads that conform to the outer surface of the output shaft. Lever rods are connected to both ends of the lower part of the drum brake device, and the lower ends of the levers are controlled by a telescopic device (e.g., a pneumatic, electric, or hydraulically controlled mechanical structure). Its working principle is as follows: initially, the brake pads are located above the output shaft and do not contact it, thus not interfering with its movement. When braking is required, the telescopic device is activated. The device pulls the drum brake downwards via a lever, causing the brake pads inside the drum brake to contact and press against the output shaft, thus achieving braking operation.

[0008] The end positioning mechanism includes a main shaft that penetrates the drive frame. The main shaft is connected to the inner two side walls of the drive frame through a set of mounting bushings. A driven sprocket connected to the drive frame is fitted on the smooth rod of the main shaft inside the drive frame. A limit component is installed on the smooth rod of the main shaft that penetrates the inner side plate of the drive frame. A set of spaced rotating threaded sleeves is installed on the threaded rod of the main shaft inside the limit component. Several triangular T-shaped sliders are arranged in a circumferential array on the outer circumference of the rotating threaded sleeves. The rotating threaded sleeves are connected by connecting rods inserted into the corresponding triangular T-shaped sliders at both ends. An inwardly grooved inclined T-shaped slide plate is slidably installed on the outer side of each triangular T-shaped slider. The inwardly grooved inclined T-shaped slide plate is mounted on the positioning plate using an arc plate.

[0009] In this invention, the rod inside the drive frame of the main shaft is a smooth rod, while the rod inside the positioning plate is a threaded rod. The threaded rod here is threadedly connected to the rotating threaded sleeve, while the smooth rod is connected to the drive frame via a mounting bushing. Multiple triangular T-shaped sliders are mounted on the outer circumference of the rotating threaded sleeve. Each triangular T-shaped slider has a right-angled triangular structure, with its longer right-angled side connecting to the outer circumference of the rotating threaded sleeve, and the section where the shorter right-angled side connects to the hypotenuse forming a T-shape. The inclined T-shaped sliding plate with the inner groove has a right-angled trapezoidal structure. The structure has a hypotenuse that corresponds to the hypotenuse of the triangular T-shaped slider. The upper straight edge of the inclined T-shaped slide plate with the inner groove is connected to the positioning plate through an arc plate. The shorter side of the two parallel sides corresponds to the shorter right-angle side of the triangular T-shaped slider. When the power is driven by the servo motor through the reducer and then by the chain drive consisting of the output sprocket and the driven sprocket, the main shaft will drive the rotating threaded sleeve. The rotating threaded sleeve will drive the positioning plate to open or close through the cooperation of the triangular T-shaped slider and the inclined T-shaped slide plate with the inner groove, thereby realizing the rapid positioning of the inner wall of the sucker rod.

[0010] The limiting component includes a disc, which is mounted on the outside of the main shaft via a rotating sleeve. Multiple limiting plates are evenly spaced around the outer circumference of the disc. A rectangular groove is provided inside the disc at the corresponding positioning plate. An insert plate is installed inside each rectangular groove. A set of rollers that are tactilely connected to the inner and outer sides of the disc are provided on the inner and outer sides of the insert plate relative to the rectangular groove. The insert plate is connected to the positioning plate by an arc-shaped plate.

[0011] In this invention, the limiting component serves two purposes: firstly, it limits the length of the end positioning mechanism extending into the sucker rod; secondly, through the cooperation of the rectangular groove and the insert plate (connected to the positioning plate), it ensures the stable and reliable operation of the positioning plate during its up-and-down and outward movement; thirdly, through the cooperation of the rectangular groove, the insert plate (connected to the positioning plate), and the rollers, the insert plate drives the positioning plate to move under the limiting effect of the rectangular groove, enabling it to position the ends of sucker rods of different diameters. The rollers ensure that the movement is always along the surface of the disc during up-and-down movement, maintaining a stable state and preventing deviation; furthermore, the limiting component also limits the stroke of the guide spraying mechanism along the horizontal movement of the sucker rod, preventing it from moving excessively horizontally along the sucker rod and causing it to detach from the sucker rod.

[0012] Specifically, four rectangular slots are set inside the disc (the number can be set according to actual use). These four rectangular slots are arranged in an array with the center of the disc as the array point. This makes the rectangular slots on the top and bottom sides of the disc vertically arranged, while the rectangular slots on the left and right sides are horizontally arranged. The insert plate is inserted vertically or horizontally into the corresponding rectangular slot. Rollers are installed on both sides of the plate relative to the rectangular slot, and the line connecting the axes of the rollers is perpendicular to the direction of the corresponding rectangular slot. This structure allows multiple positioning plates arranged in a circular array outside the main shaft to expand outward or contract inward along a circular trajectory, so that multiple positioning plates can be synchronously attached to the inner wall of the sucker rod.

[0013] The pneumatic brake mechanism includes a set of vertical plates located on the outer side plate of the drive frame. The upper ends of the vertical plates are connected by pneumatic components, and the lower ends are connected by connecting plates. Each vertical plate has an arc-shaped brake plate in the middle of its inner side that matches the curvature of the main shaft. Each brake plate is connected to the corresponding vertical plate by a triangular plate.

[0014] In this invention, the lower ends of the vertical plates of the pneumatic brake mechanism are rotatably connected to the connecting plates. When the pneumatic components drive the vertical plates to move, the vertical plates are linked together through the connecting plates. Finally, a pair of brake plates quickly grip the main shaft to achieve the braking function. The pneumatic brake mechanism is the main shaft brake operating mechanism located in the power transmission part, and the mechanical rod-type drum brake assembly is the output shaft brake operating mechanism located in the power output part. The two cooperate with each other to achieve dual locking of the power output end and the power transmission end, thereby achieving a fast and reliable braking effect.

[0015] The movable frame includes an L-shaped plate. A set of lead screws installed at vertical intervals are provided on the inner side of the L-shaped plate. One end of the lead screw is connected to the L-shaped plate through a bearing seat, and the other end is connected to the power frame. The inner side of the L-shaped plate is connected by multiple support columns. Each lead screw is threadedly connected to a movable threaded block. The movable threaded block is connected to the guide spraying mechanism through a connecting assembly. Each movable threaded block is equipped with an ME-8108 type limit switch assembly. Each limit switch assembly is slidably connected to the corresponding support column by a limit switch follower guide frame. Each movable threaded block is provided with an indicator arrow plate behind it. The indicator arrow plate is slidably connected to a grooved indicator panel provided behind the L-shaped plate.

[0016] In this invention, a set of vertically arranged support columns is installed at the right-angle corner of the L-shaped plate, and a corresponding set of vertically arranged support columns is also installed on the outer side of the shorter L-shaped plate. The other end of each support column is fixedly connected to the power frame, and the support column is a smooth rod structure. A set of lead screws is located in the middle of the L-shaped plate and is arranged vertically. A set of vertically arranged grooved indicator panels is opened on the back of the longer L-shaped plate. The grooved indicator panels are marked with corresponding dimension data, and an indicator arrow plate is located inside the corresponding grooved indicator panel. One end of the indicator arrow plate is connected to the corresponding movable threaded block, and the other end is provided with an indicator arrow. When the movable threaded block drives the guide spraying mechanism to move and spray along the outer surface of the sucker rod through the connecting assembly, the indicator arrow plate moves synchronously and can intuitively indicate the data on the grooved indicator panel to represent the distance of the moving spraying, thereby realizing intuitive display of the spraying progress when spraying the sucker rod.

[0017] The power frame includes a base located on one side of the L-shaped plate. A drive motor is installed inside the base. A bevel gear set is connected to the output end of the drive motor. A cylindrical gear set is meshed below the bevel gear set. The cylindrical gear set is connected to the corresponding lead screw end by a drive shaft and bearing housing assembly.

[0018] The guiding spraying mechanism includes an annular spraying assembly located between the outer wall cleaning scraper mechanism and the outer wall spraying cleaning mechanism. An annular guide assembly is provided on the left side of the annular spraying assembly. An outer gear ring is installed on the outer periphery of the annular spraying assembly. A pinion is meshed below the outer gear ring. The pinion is mounted on a U-shaped frame and is powered by a reduction motor. Several spraying devices are arranged in a circular array inside the annular spraying assembly. Multiple nozzles are provided on each spraying device.

[0019] The annular guide assembly includes a guide cylinder with end caps at both ends. The guide cylinder is connected to the annular spraying assembly via a connecting collar. Several guide wheels arranged in a circular array are installed inside the guide cylinder.

[0020] In this invention, the guiding spraying mechanism, the outer wall cleaning scraper mechanism, and the outer wall spraying and cleaning mechanism have multiple operating modes: First, the outer wall cleaning scraper mechanism starts working, while the guiding spraying mechanism and the outer wall spraying and cleaning mechanism stop working and move horizontally along the sucker rod axis. Simultaneously, the outer wall cleaning scraper mechanism rotates to effectively clean the dirt on its outer surface. Second, the outer wall cleaning scraper mechanism stops working, while the guiding spraying mechanism and the outer wall spraying and cleaning mechanism start working simultaneously, moving horizontally along the sucker rod axis. Each component rotates on its own axis, forming a spiral trajectory. The guiding spraying mechanism comprehensively sprays the anti-corrosion liquid onto the outer surface of the sucker rod in a spiral cycle, while the outer wall spraying and cleaning mechanism simultaneously cleans up any excess anti-corrosion liquid to prevent dripping. Thirdly, when the guiding spraying mechanism and the outer wall cleaning scraper mechanism are not in operation, the outer wall spraying and cleaning mechanism begins to work, smoothing and leveling the anti-corrosion liquid on the sucker rod surface through its spiral trajectory, ensuring a more even coverage. Of course, there are other usage methods in actual use, which will not be elaborated here.

[0021] The outer wall cleaning scraper mechanism includes a first connecting plate connected to the guide spraying mechanism. The first connecting plate is provided with a first external gear, a slewing bearing assembly, and a first drive gear meshing with it. The first drive gear uses a first drive motor as its power source. A first support frame is provided on the outside of the first connecting plate. Dust collection pipes are provided in the lower front, back, left, and right sides of the first support frame. First cylinders are provided in the upper front, back, left, and right sides of the first support frame. A cleaning roller brush is connected to the power end of each of the first cylinders. A wiping bracket is provided below each pair of cleaning roller brushes. The wiping brackets are all mounted on corresponding telescopic cylinders.

[0022] In this invention, four cleaning roller brushes are arranged in an array inside the first support frame, located at the upper part of the first support frame. Similarly, four wiping pads are arranged in an array inside the first support frame, located at the lower part of the first support frame, with the wiping pads positioned between each pair of cleaning roller brushes. This arrangement of multiple wiping pads and cleaning roller brushes at intervals allows them to work together to divide the outer surface of the sucker rod into eight arc-shaped surfaces, which then cover the circumference of the outer surface of the sucker rod, thus achieving effective cleaning of the outer surface of the sucker rod.

[0023] The outer wall spraying and cleaning mechanism includes a second connecting plate connected to the guide spraying mechanism. The second connecting plate is provided with a second external gear, a slewing bearing assembly, and a second drive gear meshing with it. The second drive gear uses a second drive motor as its power source. A second support frame is provided on the outside of the second connecting plate. Liquid collection pipes are provided in the lower front, back, left, and right sides of the interior of the second support frame, and second cylinders are provided in the upper front, back, left, and right sides of the interior. A cleaning roller assembly is connected to the power end of the inner side of each of the second cylinders.

[0024] In this invention, the cleaning roller assembly includes a mounting base connected to a second cylinder. A scraper with a triangular structure is installed inside the mounting base. Each side of the cleaning roller assembly has a side plate, and a fixed wheel frame is vertically mounted on the outer end of each side plate. A scraping roller is mounted on the end of each fixed wheel frame near the scraper. The mounting base and scraper are located in the middle of the cleaning roller assembly and do not contact the side plates on either side. The second cylinder can drive the scraper to move back and forth inside the cleaning roller assembly. Furthermore, the fixed wheel frame and the scraping roller are connected by an elastic structure, so that initially, the scraping roller contacts both ends of the scraper. When the second cylinder drives the scraper to move, this elastic structure ensures that the scraping roller remains in contact with the scraper, thereby squeezing the anti-corrosion liquid scraped off the scraper to detach it from the scraper and allow it to fall into the collection pipe below the scraper for further processing.

[0025] The beneficial effects of this invention are as follows: This invention is a corrosion-resistant coating device for sucker rod production. In use, this invention utilizes a symmetrically arranged set of end positioning mechanisms, a drive frame, a pneumatic brake mechanism, a moving frame, a power frame, and a guide spraying mechanism. The drive frame drives multiple positioning plates of the end positioning mechanism to unfold and expand outward to abut against the inner circumferential surface of the sucker rod. A dual braking device, utilizing both the pneumatic brake mechanism and a mechanical pull-rod type drum brake assembly, provides rapid braking. This eliminates the need for multiple sets of supports (such as arc-shaped supports, V-shaped rollers, and cantilever brackets) to fix the sucker rod, effectively solving the problem of the contact area between the support and the rod not being covered by the spray gun due to physical obstruction. This achieves a corrosion-resistant blind spot effect and eliminates the need for multiple sets of triangular plates (upper brush cotton) and supports (lower brush cotton), greatly simplifying the structure. Then, the moving frame… The invention utilizes a power frame to drive a guiding spraying mechanism that adheres to the outer surface of the sucker rod and moves along its horizontal axis for spraying. This facilitates complete spraying of the sucker rod's outer surface, ensuring all-around anti-corrosion coating without the need for touch-ups, significantly improving work efficiency. Furthermore, before and after spraying, an external wall cleaning scraper mechanism and an external wall spraying cleaning mechanism can be used for pre- and post-spraying treatment. Pre-spraying effectively removes dirt from the sucker rod surface, improving the spraying effect and ensuring overall coating quality. Post-spraying, excess anti-corrosion liquid is effectively removed from the sucker rod surface, preventing dripping and contamination of the workshop environment, and ensuring uniform coating of the anti-corrosion liquid on the sucker rod's outer surface. This invention boasts advantages such as simple and reasonable structure, achieving all-around uniform spraying, spraying progress indication, rapid pre- and post-spraying treatment, and high work efficiency. Attached Figure Description

[0026] Figure 1 This is a front view of the present invention.

[0027] Figure 2 For the present invention Figure 1 Partial three-dimensional diagram of the structure.

[0028] Figure 3 For the present invention Figure 2 A partial structural diagram.

[0029] Figure 4 For the present invention Figure 2 Partial structural cross-sectional view.

[0030] Figure 5 This is a schematic diagram of the structure of the mobile frame and the power frame of the present invention.

[0031] Figure 6 For the present invention Figure 1 A partial front view of the structure.

[0032] Figure 7 This is a schematic diagram of the guiding spraying mechanism of the present invention.

[0033] Figure 8 This is a schematic diagram of the structure of the annular guide assembly of the present invention.

[0034] Figure 9 This is a schematic diagram of the external wall cleaning scraper mechanism of the present invention.

[0035] Figure 10 This is a schematic diagram and a partially enlarged schematic diagram of the external wall spraying and cleaning mechanism of the present invention.

[0036] In the diagram: 1. Frame; 11. Support seat; 12. Hinge seat; 13. Push-pull cylinder; 14. Rail; 2. Drive frame; 21. Slide; 22. Servo motor; 23. Reducer; 24. Output sprocket; 25. Mechanical tie rod type drum brake assembly; 3. End positioning mechanism; 31. Main shaft; 32. Mounting bushing; 33. Driven sprocket; 34. Limiting assembly; 401. Disc; 402. Rotating sleeve; 403. Limiting plate; 404. Rectangular groove; 405. Insert plate; 406. Roller; 35. Rotating threaded sleeve; 36. Triangular T-shaped slide. Block 37, connecting rod 38, recessed inclined T-shaped slide plate 39, positioning plate 301, arc plate 4, pneumatic brake mechanism 41, vertical plate 42, pneumatic assembly 43, connecting plate 44, brake plate 45, triangular plate 5, moving frame 51, L-shaped plate 52, lead screw 53, support column 54, moving threaded block 55, limit switch assembly 56, limit switch follow-up guide frame 57, indicator arrow plate 58, slotted indicator panel 6, power frame 61, base 62, drive motor 63, bevel gear set 6 4. Cylindrical gear set 65. Transmission shaft and bearing housing assembly 7. Guide spraying mechanism 71. Annular spraying assembly 72. Annular guide assembly 721. Guide cylinder 722. End cover 723. Connecting collar 724. Guide wheel 73. External gear ring 74. Pinion 75. U-shaped frame 76. Gearbox 77. Gear reducer 77. Spraying device 78. Spray nozzle 8. Connecting assembly 9. External wall cleaning scraper mechanism 91. First connecting plate 92. First external gear and slewing bearing assembly 93. First drive gear 94. First Drive motor 95, first support frame 96, dust collection pipe 97, first cylinder 98, cleaning roller brush 99, telescopic cylinder 901, wiping tile holder 10, outer wall spraying cleaning mechanism 101, second connecting plate 102, second external gear and slewing bearing assembly 103, second drive gear 104, second drive motor 105, second support frame 106, liquid collection pipe 107, second cylinder 108, cleaning roller assembly 81, mounting base 82, scraper 83, fixed wheel frame 84, and scraping roller. Detailed Implementation

[0037] The present invention will be further described below with reference to the embodiments and / or accompanying drawings. Example 1

[0038] like Figure 1-10 As shown, a corrosion-resistant coating device for sucker rod production includes a frame 1 and a guiding spraying mechanism 7. A set of drive frames 2 are symmetrically arranged on the left and right sides above the frame 1. The drive frames 2 are laterally slidably connected to the frame 1. Each drive frame 2 has an end positioning mechanism 3 installed inside. The end positioning mechanism 3 uses the drive frames 2 as a power source to control its deployment and positions the inner wall of the sucker rod end. Furthermore, the end positioning mechanism 3 utilizes a pneumatic brake mechanism 4 located outside the drive frames 2 to perform a rapid and reliable braking operation on the shaft end penetrating the drive frames 2. The frame 1 contains... A movable frame 5 is provided on the side. A guide spraying mechanism 7 is provided above the front of the movable frame 5, and is on the same horizontal line as the central axis of the end positioning mechanism 3. The guide spraying mechanism 7 is connected to the movable frame 5 through a connecting component 8. An outer wall cleaning scraper mechanism 9 and an outer wall spraying cleaning mechanism 10 are respectively provided on its left and right sides. The movable frame 5 uses a power frame 6 located on one side as a power source to drive the guide spraying mechanism 7 to move along the horizontal axis of the sucker rod for spraying operations. It works in conjunction with the outer wall cleaning scraper mechanism 9 and the outer wall spraying cleaning mechanism 10 to realize the pre- and post-spraying treatment operations on the outer wall of the sucker rod.

[0039] The end positioning mechanism 3 includes a main shaft 31 that penetrates the drive frame 2. The main shaft 31 is connected to the inner side walls of the drive frame 2 through a set of mounting bushings 32. A driven sprocket 33, which is poweredly connected to the drive frame 2, is fitted on the smooth rod body of the main shaft 31 inside the drive frame 2. A limit component 34 is installed on the smooth rod body of the main shaft 31 that penetrates the inner side plate of the drive frame 2. A set of spaced rotating threaded sleeves 35 are fitted on the threaded rod body of the main shaft 31 inside the limit component 34. Several triangular T-shaped sliders 36 are arranged in a circumferential array on the outer periphery of the rotating threaded sleeves 35. The rotating threaded sleeves 35 are connected by connecting rods 37 inserted into the corresponding triangular T-shaped sliders 36 at both ends. An inwardly grooved inclined T-shaped slide plate 38 is slidably fitted on the outer side of each triangular T-shaped slider 36. The inwardly grooved inclined T-shaped slide plate 38 is mounted on the positioning plate 39 using an arc plate 301.

[0040] The limiting component 34 includes a disc 401, which is mounted on the outside of the main shaft 31 via a rotating sleeve 402. Multiple limiting plates 403 are evenly spaced on the outer periphery of the disc 401. A rectangular groove 404 is provided inside the disc 401 corresponding to the positioning plate 39. An insert plate 405 is installed inside the rectangular groove 404. A set of rollers 406 that are rolled and connected to the inner and outer sides of the disc 401 are provided on the inner and outer sides of the insert plate 405 relative to the rectangular groove 404. The insert plate 405 is connected to the positioning plate 39 by an arc plate 301.

[0041] In this embodiment, firstly, the positions of the drive frames at both ends are roughly adjusted according to the length of the sucker rod. Then, one end of the sucker rod passes through the outer wall cleaning scraper mechanism, the guide spraying mechanism, and the outer wall spraying cleaning mechanism, and is connected to the corresponding end positioning mechanism. Then, the other end is connected to the end positioning mechanism, so that both ends are inserted into the outside of the end positioning mechanisms at both ends. Then, the push-pull cylinder is activated, which drives the drive frame to move on the frame (the slide block and the track slide together), so that the end positioning mechanisms at both ends move closer to each other. The length of the end positioning mechanism extending into the sucker tube is adjusted until the outer end of the sucker tube contacts the limiting component and stops. Then, the servo motor is activated. The main shaft is driven to rotate by the transmission action of the reducer, output sprocket, and driven sprocket. When the main shaft rotates, its threaded end will drive the rotating threaded sleeve to move horizontally relative to the main shaft. When the rotating threaded sleeve moves horizontally, it will drive the triangular T-shaped slider to move synchronously. Since the triangular T-shaped slider and the inclined T-shaped slide plate with the inner groove slide together, when the triangular T-shaped slider moves under the drive of the rotating threaded sleeve, its lowest end of the inclined side slides with the inclined T-shaped slide plate with the inner groove, and finally moves to the highest end of its inclined side to slide with the inclined T-shaped slide plate with the inner groove. This causes the inclined T-shaped slide plate with the inner groove to move up and down from the horizontal plane of the lowest end of the inclined side to the horizontal plane of the highest end of the inclined side (e.g., Figure 4 As shown in the diagram, multiple inclined T-shaped sliding plates with internal grooves expand outward along a circumferential trajectory. Ultimately, these inclined T-shaped sliding plates drive the positioning plate to unfold or close, thereby achieving rapid positioning of the inner wall of the sucker rod. Then, a mechanical pull rod type drum brake assembly is used in conjunction with a pneumatic holding brake mechanism for rapid braking. Similarly, when the positioning plate unfolds or closes, it drives the insert plate to move in the rectangular groove, and the insert plate drives two sets of rollers to roll against the circumferential surfaces on both sides of the disc, ensuring smooth and reliable movement. Moreover, it can also position the ends of sucker rods of different diameters, making it highly practical.

[0042] The pneumatic brake mechanism 4 includes a set of vertical plates 41 located on the outer side plate of the drive frame 2. The upper ends of the vertical plates 41 are connected by a pneumatic assembly 42, and the lower ends are connected by a connecting plate 43. Each vertical plate 41 has an arc-shaped brake plate 44 that matches the curvature of the main shaft 31 in the middle of its inner side. Each brake plate 44 is connected to the corresponding vertical plate 41 by a triangular plate 45.

[0043] The movable frame 5 includes an L-shaped plate 51. A set of lead screws 52 installed at vertical intervals are provided on the inner side of the L-shaped plate 51. One end of the lead screw 52 is connected to the L-shaped plate 51 through a bearing seat, and the other end is powered to the power frame 6. The inner side of the L-shaped plate 51 is connected by multiple support columns 53. Each lead screw 52 is threadedly connected to a movable threaded block 54. The movable threaded block 54 is connected to the guide spraying mechanism 7 through a connecting assembly 8. Each movable threaded block 54 is equipped with an ME-8108 type limit switch assembly 55. Each limit switch assembly 55 is slidably connected to the corresponding support column 53 by a limit switch follower guide frame 56. Each movable threaded block 54 is provided with an indicator arrow plate 57. The indicator arrow plate 57 is slidably connected to a grooved indicator panel 58 provided behind the L-shaped plate 51.

[0044] The power frame 6 includes a base 61 located on one side of the L-shaped plate 51. A drive motor 62 is installed inside the base 61. A bevel gear set 63 is connected to the output end of the drive motor 62. A cylindrical gear set 64 is meshed below the bevel gear set 63. The cylindrical gear set 64 is connected to the end of the corresponding lead screw 52 by means of a drive shaft and bearing seat assembly 65.

[0045] In this embodiment, the working principle of the moving frame and the power frame is as follows: The drive motor is started, and the output end of the drive motor uses a bevel gear set to drive a cylindrical gear set to rotate. The cylindrical gear set uses a transmission shaft and bearing housing assembly to drive the corresponding lead screw to rotate. The lead screw drives the moving threaded block to move laterally along the lead screw. The moving threaded block uses a connecting assembly to drive the guide spraying mechanism, the outer wall cleaning scraper mechanism, and the outer wall spraying and cleaning mechanism to move laterally horizontally as a whole, thereby achieving uniform spraying operation on the outer surface of the sucker rod and cleaning operations before and after spraying. During the rapid movement of the moving threaded block, the limit switch assembly uses the sliding cooperation between the limit switch follower guide frame and the support column to achieve follow-up and record the current travel distance. This facilitates the operation of the PLC programming control equipment according to the length of the sucker rod. The indicator arrow plate and the slotted indicator panel are used to intuitively display the actual progress of the current spraying operation and the cleaning operations before and after spraying.

[0046] This invention relates to an anti-corrosion coating device for sucker rod production. In use, the invention utilizes a symmetrically arranged set of end positioning mechanisms 3, drive frame 2, pneumatic brake mechanism 4, moving frame 5, power frame 6, and guiding spraying mechanism 7. The drive frame 2 drives multiple positioning plates 39 of the end positioning mechanism 3 to unfold and expand outwards to abut against the inner circumferential surface of the sucker rod. Rapid braking is achieved using a dual braking device consisting of the pneumatic brake mechanism 4 and a mechanical pull-rod type drum brake assembly 25. This eliminates the need for multiple sets of supports (such as arc-shaped supports, V-shaped rollers, and cantilever brackets) to fix the sucker rod, effectively solving the problem of the contact area between the support and the rod not being covered by the spray gun due to physical obstruction. This achieves a corrosion-free blind spot effect and eliminates the need for multiple sets of triangular plates (upper brush cotton) and supports (lower brush cotton), greatly simplifying the structure. Then, the moving frame 5 utilizes… The power frame 6 drives the guiding spraying mechanism 7 to conform to the outer surface of the sucker rod and move along the horizontal axis of the sucker rod for spraying. This facilitates complete spraying of the outer surface of the sucker rod by the spray nozzle 78, ensuring that the sucker rod receives all-around anti-corrosion spraying without the need for touch-up coating, thus significantly improving work efficiency. In addition, before and after spraying the sucker rod, the outer wall cleaning scraper mechanism 9 and the outer wall spraying cleaning mechanism 10 can be used for pre- and post-spraying treatment, respectively. Before spraying, the surface dirt of the sucker rod is effectively removed, improving the spraying effect and ensuring the overall spraying quality. At the same time, after spraying, excess anti-corrosion liquid on the surface of the sucker rod is effectively removed, preventing dripping and pollution of the workshop environment, and also ensuring that the anti-corrosion liquid is evenly coated on the outer surface of the sucker rod. This invention has the advantages of simple and reasonable structure, achieving all-around uniform spraying, spraying progress indication, rapid pre- and post-spraying treatment, and high work efficiency. Example 2

[0047] like Figure 1-10 As shown, a corrosion-resistant coating device for sucker rod production includes a frame 1 and a guiding spraying mechanism 7. A set of drive frames 2 are symmetrically arranged on the left and right sides above the frame 1. The drive frames 2 are laterally slidably connected to the frame 1. Each drive frame 2 has an end positioning mechanism 3 installed inside. The end positioning mechanism 3 uses the drive frames 2 as a power source to control its deployment and positions the inner wall of the sucker rod end. Furthermore, the end positioning mechanism 3 utilizes a pneumatic brake mechanism 4 located outside the drive frames 2 to perform a rapid and reliable braking operation on the shaft end penetrating the drive frames 2. The frame 1 contains... A movable frame 5 is provided on the side. A guide spraying mechanism 7 is provided above the front of the movable frame 5, and is on the same horizontal line as the central axis of the end positioning mechanism 3. The guide spraying mechanism 7 is connected to the movable frame 5 through a connecting component 8. An outer wall cleaning scraper mechanism 9 and an outer wall spraying cleaning mechanism 10 are respectively provided on its left and right sides. The movable frame 5 uses a power frame 6 located on one side as a power source to drive the guide spraying mechanism 7 to move along the horizontal axis of the sucker rod for spraying operations. It works in conjunction with the outer wall cleaning scraper mechanism 9 and the outer wall spraying cleaning mechanism 10 to realize the pre- and post-spraying treatment operations on the outer wall of the sucker rod.

[0048] The guiding spraying mechanism 7 includes an annular spraying assembly 71 located between the outer wall cleaning scraper mechanism 9 and the outer wall spraying cleaning mechanism 10. An annular guide assembly 72 is provided on the left side of the annular spraying assembly 71. An outer gear ring 73 is installed on the outer periphery of the annular spraying assembly 71. A pinion 74 is meshed below the outer gear ring 73. The pinion 74 is installed on a U-shaped frame 75 and is powered by a reduction motor 76. Several spraying devices 77 are arranged in a circular array inside the annular spraying assembly 71. Multiple nozzles 78 are provided on the spraying devices 77.

[0049] The annular guide assembly 72 includes a guide cylinder 721, with end caps 722 at both ends of the guide cylinder 721. The guide cylinder 721 is connected to the annular spraying assembly 71 by a connecting collar 723. Several guide wheels 724 arranged in a circular array are installed inside the guide cylinder 721.

[0050] In this embodiment, the working principle of the guiding spraying mechanism is as follows: When the power frame drives the moving frame to move the guiding spraying mechanism along the outer surface of the sucker rod, the reduction motor is started. The output end of the reduction motor uses a pinion to drive the external gear ring to rotate, thereby driving the guiding spraying mechanism to rotate. This causes the annular spraying assembly to rotate relative to the sucker rod. The annular spraying assembly sprays the circumferential surface of the sucker rod through multiple spraying devices installed inside it. The spraying devices are equipped with multiple nozzles, which greatly improves the efficiency of the nozzle operation. Combined with the overall horizontal movement of the guiding spraying mechanism along the sucker rod, the guiding spraying mechanism achieves a spiral cyclical motion around the sucker rod, thereby allowing the guiding spraying mechanism to move along the... The axial helical motion of the sucker rod ensures uniform spraying. During spraying, an annular guide assembly guides the annular spraying assembly to move smoothly along the sucker rod. The annular guide assembly, positioned to one side of the annular spraying assembly, prevents damage to the sprayed sucker rod surface. In practical applications, the guide wheel inside the annular guide assembly can be connected to the inner wall of the annular guide assembly via a telescopic device. An elastic component connects the guide wheel to the telescopic device; the guide wheel can be a rubber wheel. The elastic compensation of the elastic component ensures the guide wheel always effectively conforms to the outer surface of the sucker rod. Furthermore, the telescopic device allows adjustment of the distance between the guide wheel and the sucker rod.

[0051] The outer wall cleaning scraper mechanism 9 includes a first connecting plate 91 connected to the guide spraying mechanism 7. The first connecting plate 91 is provided with a first external gear and a slewing bearing assembly 92, as well as a first drive gear 93 meshing with it. The first drive gear 93 uses a first drive motor 94 as its power source. A first support frame 95 is provided on the outside of the first connecting plate 91. Dust collection pipes 96 are provided on the lower front, back, left and right sides of the inside of the first support frame 95, and first cylinders 97 are provided on the upper front, back, left and right sides of the inside. A cleaning roller brush 98 is connected to the power end of the inner side of each of the first cylinders 97. A wiping bracket 901 is provided below each pair of cleaning roller brushes 98. The wiping bracket 901 is installed on the corresponding telescopic cylinder 99.

[0052] In this embodiment, the working principle of the outer wall cleaning scraper mechanism is as follows: Before spraying, the outer surface of the sucker rod is first cleaned using the outer wall cleaning scraper mechanism to ensure the spraying quality. The first cylinder is activated, which drives the cleaning roller brush to move towards the sucker rod. The telescopic cylinder is activated, which drives the wiping bearing to move towards the sucker rod. On the one hand, the distance between the cleaning roller brush and / or the wiping bearing and the sucker rod can be adjusted according to the actual cleaning needs, thereby adjusting the cleaning force to meet different cleaning effects. On the other hand, it can be adaptively adjusted according to sucker rods of different diameters. This process ultimately results in multiple cleaning rollers evenly distributed on the outer circumferential surface of the sucker rod, and multiple wiping pads evenly distributed on adjacent outer circumferential surfaces, with the wiping pads and cleaning rollers alternating at intervals. Then, the first drive motor is started, which uses the first drive gear to drive the first external gear and the slewing bearing assembly to rotate, thereby achieving overall rotation relative to the sucker rod. In conjunction with the power frame, the moving frame drives the outer wall cleaning scraper mechanism to move along the axial direction of the sucker rod, achieving a uniform rotational cleaning operation on the outer surface of the sucker rod. The cleaned dirt falls into the dust collection pipe for collection.

[0053] The outer wall spraying and cleaning mechanism 10 includes a second connecting plate 101 connected to the guide spraying mechanism 7. The second connecting plate 101 is provided with a second external gear and a slewing bearing assembly 102 and a second drive gear 103 meshing with it. The second drive gear 103 uses a second drive motor 104 as the power source. A second support frame 105 is provided on the outside of the second connecting plate 101. The second support frame 105 is provided with liquid collection pipes 106 at the bottom front, back, left and right, and second cylinders 107 at the top front, back, left and right. The power end of the second cylinder 107 is connected to a cleaning roller assembly 108.

[0054] In one feasible embodiment, the cleaning roller assembly includes a mounting base connected to a second cylinder, and a scraper with a triangular structure is provided inside the mounting base. A side plate is provided on each side of the cleaning roller assembly, and a fixed wheel frame is vertically mounted on the outer end of each side plate. A scraping roller is mounted on the end of each fixed wheel frame near the scraper. The mounting base and scraper are located in the middle of the cleaning roller assembly and do not contact the side plates on either side. The second cylinder can drive the scraper to move back and forth inside the cleaning roller assembly. Furthermore, the fixed wheel frame and the scraping roller are connected by an elastic structure, so that in the initial state, the scraping roller is in contact with both ends of the scraper. When the second cylinder drives the scraper to move, this elastic structure ensures that the scraping roller remains in contact with the scraper, thereby squeezing the anti-corrosion liquid scraped off the scraper to detach it from the scraper and allow it to fall into the collection pipe below the scraper for treatment.

[0055] In this embodiment, the working principle of the external wall spraying and cleaning mechanism is as follows: After spraying, the external wall spraying and cleaning mechanism cleans the excess anti-corrosion liquid on the outer surface of the sucker rod, and reasonably controls the spraying thickness to ensure the spraying effect. The second cylinder is activated, driving the cleaning roller assembly to move towards the sucker rod. This allows for adjustment of the distance between the cleaning roller assembly and the sucker rod according to actual cleaning needs, thereby adjusting the cleaning effect. It also allows for adaptive adjustment according to different spraying thickness requirements (the distance between the cleaning roller assembly and the sucker rod is easily adjustable via the second cylinder, facilitating reasonable control). The coating thickness can be adjusted to meet different coating effects, and can be adapted to different diameter sucker rods. This results in multiple cleaning roller assemblies being evenly distributed on the outer circumferential surface of the sucker rod. Then, the second drive motor is started. The second drive motor uses the second drive gear to drive the second external gear and the slewing bearing assembly to rotate, thereby achieving overall rotation relative to the sucker rod. In conjunction with the power frame, the moving frame drives the outer wall spraying and cleaning mechanism to move along the sucker rod axis, achieving a uniform rotational cleaning operation on the outer surface of the sucker rod. The cleaned anti-corrosion liquid falls into the collection pipe for collection. Specifically, when the cleaning roller assembly scrapes away excess anti-corrosion liquid from the outer surface of the sucker rod at a specified coating thickness, most of the scraped anti-corrosion liquid falls back into the collection pipe for treatment, preventing dripping of excess anti-corrosion liquid from the outer surface of the sucker rod and thus avoiding pollution of the workshop environment. Moreover, the collected anti-corrosion liquid can be reused after treatment, saving resources. A small amount of anti-corrosion liquid will adhere to the scraper. After cleaning, the second cylinder drives the scraper to move away from the center of the outer wall spraying and cleaning mechanism. Under the pressure of the scraping rollers on both sides, the scraper moves outward. The squeezing action of the scraping rollers on the scraper causes the anti-corrosion liquid adhering to the scraper to detach and fall into the collection pipe for collection, avoiding affecting the scraping effect of the scraper to remove excess anti-corrosion liquid from the outer surface of the sucker rod again.

[0056] This invention relates to an anti-corrosion coating device for sucker rod production. In use, the invention utilizes a symmetrically arranged set of end positioning mechanisms 3, drive frame 2, pneumatic brake mechanism 4, moving frame 5, power frame 6, and guiding spraying mechanism 7. The drive frame 2 drives multiple positioning plates 39 of the end positioning mechanism 3 to unfold and expand outwards to abut against the inner circumferential surface of the sucker rod. Rapid braking is achieved using a dual braking device consisting of the pneumatic brake mechanism 4 and a mechanical pull-rod type drum brake assembly 25. This eliminates the need for multiple sets of supports (such as arc-shaped supports, V-shaped rollers, and cantilever brackets) to fix the sucker rod, effectively solving the problem of the contact area between the support and the rod not being covered by the spray gun due to physical obstruction. This achieves a corrosion-free blind spot effect and eliminates the need for multiple sets of triangular plates (upper brush cotton) and supports (lower brush cotton), greatly simplifying the structure. Then, the moving frame 5 utilizes… The power frame 6 drives the guiding spraying mechanism 7 to conform to the outer surface of the sucker rod and move along the horizontal axis of the sucker rod for spraying. This facilitates complete spraying of the outer surface of the sucker rod by the spray nozzle 78, ensuring that the sucker rod receives all-around anti-corrosion spraying without the need for touch-up coating, thus significantly improving work efficiency. In addition, before and after spraying the sucker rod, the outer wall cleaning scraper mechanism 9 and the outer wall spraying cleaning mechanism 10 can be used for pre- and post-spraying treatment, respectively. Before spraying, the surface dirt of the sucker rod is effectively removed, improving the spraying effect and ensuring the overall spraying quality. At the same time, after spraying, excess anti-corrosion liquid on the surface of the sucker rod is effectively removed, preventing dripping and pollution of the workshop environment, and also ensuring that the anti-corrosion liquid is evenly coated on the outer surface of the sucker rod. This invention has the advantages of simple and reasonable structure, achieving all-around uniform spraying, spraying progress indication, rapid pre- and post-spraying treatment, and high work efficiency.

Claims

1. A coating device for anti-corrosion liquid in sucker rod production, comprising a frame and a guiding spraying mechanism, characterized in that: A set of drive frames is symmetrically arranged on the left and right sides above the frame. The drive frames are connected to the frame by a lateral sliding connection. An end positioning mechanism is installed on the inner side of each drive frame. The end positioning mechanism uses the drive frame as a power source to control its deployment and positions the inner wall of the sucker rod end. The end positioning mechanism uses a pneumatic brake mechanism located on the outside of the drive frame to quickly and reliably brake the shaft end that passes through the drive frame. A movable frame is arranged inside the frame. A guide spraying mechanism is arranged on the upper front of the movable frame and is on the same horizontal line as the central axis of the end positioning mechanism. The guide spraying mechanism is connected to the movable frame through a connecting component. An outer wall cleaning scraper mechanism and an outer wall spraying cleaning mechanism are respectively arranged on its left and right sides. The movable frame uses a power frame located on one side as a power source to drive the guide spraying mechanism to move along the horizontal axis of the sucker rod for spraying operations. It works with the outer wall cleaning scraper mechanism and the outer wall spraying cleaning mechanism to realize the pre- and post-spraying treatment operations on the outer wall of the sucker rod.

2. The anti-corrosion coating device for sucker rod production as described in claim 1, characterized in that: The end positioning mechanism includes a main shaft that penetrates the drive frame. The main shaft is connected to the inner two side walls of the drive frame through a set of mounting bushings. A driven sprocket connected to the drive frame is fitted on the smooth rod of the main shaft inside the drive frame. A limit component is installed on the smooth rod of the main shaft that penetrates the inner side plate of the drive frame. A set of spaced rotating threaded sleeves is installed on the threaded rod of the main shaft inside the limit component. Several triangular T-shaped sliders are arranged in a circumferential array on the outer circumference of the rotating threaded sleeves. The rotating threaded sleeves are connected by connecting rods inserted into the corresponding triangular T-shaped sliders at both ends. An inwardly grooved inclined T-shaped slide plate is slidably installed on the outer side of each triangular T-shaped slider. The inwardly grooved inclined T-shaped slide plate is mounted on the positioning plate using an arc plate.

3. The anti-corrosion coating device for sucker rod production as described in claim 2, characterized in that: The limiting component includes a disc, which is mounted on the outside of the main shaft via a rotating sleeve. Multiple limiting plates are evenly spaced around the outer circumference of the disc. A rectangular groove is provided inside the disc at the corresponding positioning plate. An insert plate is installed inside each rectangular groove. A set of rollers that are tactilely connected to the inner and outer sides of the disc are provided on the inner and outer sides of the insert plate relative to the rectangular groove. The insert plate is connected to the positioning plate by an arc-shaped plate.

4. The anti-corrosion coating device for sucker rod production as described in claim 2, characterized in that: The pneumatic brake mechanism includes a set of vertical plates located on the outer side plate of the drive frame. The upper ends of the vertical plates are connected by pneumatic components, and the lower ends are connected by connecting plates. Each vertical plate has an arc-shaped brake plate in the middle of its inner side that matches the curvature of the main shaft. Each brake plate is connected to the corresponding vertical plate by a triangular plate.

5. The anti-corrosion coating device for sucker rod production as described in claim 1, characterized in that: The movable frame includes an L-shaped plate. A set of lead screws installed at vertical intervals are provided on the inner side of the L-shaped plate. One end of the lead screw is connected to the L-shaped plate through a bearing seat, and the other end is connected to the power frame. The inner side of the L-shaped plate is connected by multiple support columns. Each lead screw is threadedly connected to a movable threaded block. The movable threaded block is connected to the guide spraying mechanism through a connecting assembly. Each movable threaded block is equipped with an ME-8108 type limit switch assembly. Each limit switch assembly is slidably connected to the corresponding support column by a limit switch follower guide frame. Each movable threaded block is provided with an indicator arrow plate behind it. The indicator arrow plate is slidably connected to a grooved indicator panel provided behind the L-shaped plate.

6. The anti-corrosion coating device for sucker rod production as described in claim 5, characterized in that: The power frame includes a base located on one side of the L-shaped plate. A drive motor is installed inside the base. A bevel gear set is connected to the output end of the drive motor. A cylindrical gear set is meshed below the bevel gear set. The cylindrical gear set is connected to the corresponding lead screw end by a drive shaft and bearing housing assembly.

7. The anti-corrosion coating device for sucker rod production as described in claim 5, characterized in that: The guiding spraying mechanism includes an annular spraying assembly located between the outer wall cleaning scraper mechanism and the outer wall spraying cleaning mechanism. An annular guide assembly is provided on the left side of the annular spraying assembly. An outer gear ring is installed on the outer periphery of the annular spraying assembly. A pinion is meshed below the outer gear ring. The pinion is mounted on a U-shaped frame and is powered by a reduction motor. Several spraying devices are arranged in a circular array inside the annular spraying assembly. Multiple nozzles are provided on each spraying device.

8. The anti-corrosion coating device for sucker rod production as described in claim 7, characterized in that: The annular guide assembly includes a guide cylinder with end caps at both ends. The guide cylinder is connected to the annular spraying assembly via a connecting collar. Several guide wheels arranged in a circular array are installed inside the guide cylinder.

9. The anti-corrosion coating device for sucker rod production as described in claim 7, characterized in that: The outer wall cleaning scraper mechanism includes a first connecting plate connected to the guide spraying mechanism. The first connecting plate is provided with a first external gear, a slewing bearing assembly, and a first drive gear meshing with it. The first drive gear uses a first drive motor as its power source. A first support frame is provided on the outside of the first connecting plate. Dust collection pipes are provided in the lower front, back, left, and right sides of the first support frame. First cylinders are provided in the upper front, back, left, and right sides of the first support frame. A cleaning roller brush is connected to the power end of each of the first cylinders. A wiping bracket is provided below each pair of cleaning roller brushes. The wiping brackets are all mounted on corresponding telescopic cylinders.

10. The anti-corrosion coating device for sucker rod production as described in claim 7, characterized in that: The outer wall spraying and cleaning mechanism includes a second connecting plate connected to the guide spraying mechanism. The second connecting plate is provided with a second external gear, a slewing bearing assembly, and a second drive gear meshing with it. The second drive gear uses a second drive motor as its power source. A second support frame is provided on the outside of the second connecting plate. Liquid collection pipes are provided in the lower front, back, left, and right sides of the interior of the second support frame, and second cylinders are provided in the upper front, back, left, and right sides of the interior. A cleaning roller assembly is connected to the power end of the inner side of each of the second cylinders.

Images