An anticorrosive coating device for oil and gas transmission pipe

Abstract

The application discloses an anticorrosion coating device for oil and gas conveying pipe fittings, which comprises a crown block, a base and a bent pipe fitting, characterized in that the bottom of the crown block is connected with T-shaped saddles on both sides through hoisting mechanisms, the two groups of hoisting mechanisms and the T-shaped saddles are mirror-distributed about the crown block, the hoisting mechanisms can control the suspension posture of the T-shaped saddles, and the two ends of the bent pipe fitting are suspended below the crown block through the T-shaped saddles; a trolley assembly is slidably arranged on the side surface of the base, the trolley assembly controls two groups of alignment assemblies to rotate in the middle of the bent pipe fitting in opposite directions through a transmission mechanism so as to calibrate the spraying angle of the bent pipe fitting; and a switching mechanism is further arranged below the transmission mechanism on the inner side of the trolley assembly. The application can effectively improve the efficiency of spraying operation, improve the reliability of equipment, and complete the coating operation without relying on human intervention.

Description

Technical Field

[0001] This invention relates to the field of atomized spraying technology, and more particularly to an anti-corrosion coating device for oil and gas pipeline fittings. Background Technology

[0002] In oil and gas transportation projects, to improve the corrosion resistance of pipelines and their connecting fittings, anti-corrosion coatings are typically applied to their outer surfaces before leaving the factory, forming a composite anti-corrosion layer with excellent chemical resistance and mechanical protection. Currently, the industry widely adopts a combination of electrostatic powder spraying and atomized spraying for surface coating of steel pipe fittings. By atomizing and spraying anti-corrosion materials such as epoxy resin, polyethylene, or polypropylene onto the preheated pipe surface, the atomized particles are uniformly deposited and melted and solidified at high temperatures, forming a dense protective film. For irregularly shaped pipe fittings such as elbows, tees, and flanges, suspended rotation or robotic arm follow-up spraying operations are often used to ensure the uniformity of the atomized coating coverage. Currently, existing anti-corrosion production lines typically include conveyor rollers, spraying chambers, heating and curing zones, and cooling and testing zones. Automated control systems enable precise adjustment of temperature, flow rate, and spraying pressure to ensure that the thickness and adhesion of the anti-corrosion layer meet standard requirements. Atomized spraying has the advantages of fine film formation, uniform adhesion, and adaptability to complex curved surfaces, and has become one of the important processes for surface anti-corrosion treatment of oil and gas transportation pipe fittings.

[0003] The inventors discovered during actual production that the existing technology for spraying pipe fittings still has the following problems: Existing atomized spraying methods all use conveyor rollers to rotate the tubes. However, this method is difficult to implement for bent tubes. The special characteristics of bent tubes mean that actual atomized spraying operations need to be performed on both sides separately, resulting in poor spraying continuity and affecting actual production efficiency. Existing methods for spraying bent pipes require maintaining the pipes at a temperature of around 200°C to ensure that the coating material melts on the pipe surface. The high temperature prevents direct human intervention, and the complex and redundant structure of automated hoisting equipment makes it impossible to find a good hoisting structure that can efficiently clamp the bent pipes. This makes the flipping / hoisting operation of such bent pipes particularly troublesome and complicated.

[0004] Therefore, how to provide an anti-corrosion coating device for oil and gas transmission pipelines is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One object of the present invention is to provide an anti-corrosion coating device for oil and gas transmission pipelines.

[0006] According to an embodiment of the present invention, an anti-corrosion coating device for oil and gas transmission pipelines includes a crane, a base and a bend pipe, characterized in that T-shaped saddles are connected to both sides of the bottom of the crane through a hoisting mechanism, the two sets of hoisting mechanisms and T-shaped saddles are mirror-distributed about the crane, the hoisting mechanism can control the suspension posture of the T-shaped saddles, and both ends of the bend pipe are suspended below the crane through the T-shaped saddles; A trolley assembly is slidably mounted on the side of the base. The trolley assembly controls two sets of alignment components to rotate in opposite directions in the middle of the bent pipe through a transmission mechanism in order to calibrate the spraying angle of the bent pipe. A switching mechanism is also provided on the inner side of the trolley assembly near the lower part of the transmission mechanism. The switching mechanism changes the transmission direction of the transmission mechanism and can also limit and clamp the two sets of alignment components. A shifting mechanism is provided on one side of the trolley assembly. The shifting mechanism is connected to the transmission mechanism through the switching mechanism. The trolley assembly can slide laterally on the side of the base through the shifting mechanism.

[0007] Preferably, the hoisting mechanism includes a second chain, two sets of first chains, and two sets of third chains. One end of each set of first chains is fixed to both sides of the T-shaped saddle near the intersection. The second chain is fixed to the center line of the top surface of the T-shaped saddle near the end. The two sets of third chains are fixed to both sides of the T-shaped saddle near the end.

[0008] Preferably, the fixed positions of the No. 3 chain and the T-shaped saddle and the No. 1 chain and the T-shaped saddle are located in the same plane, and the ends of the No. 1 chain, the No. 2 chain and the No. 3 chain away from the T-shaped saddle are all wound and unwound through an independent winding roller unit on the top of the crane.

[0009] Preferably, the trolley assembly includes a trolley body and a curved mounting bracket. The curved mounting bracket is fixed to the side of the trolley body near the base. A groove is formed on the base near the curved mounting bracket. The curved mounting bracket slides in the groove. An actuator rod is fixedly connected to one side of the curved mounting bracket. The output end of the actuator rod passes through the curved mounting bracket and is fixedly connected to a brake pad. A contact piece is provided on the side of the base near the brake pad. The bottom of the trolley body and the top of the curved mounting bracket slide on the surface of the base via pulleys.

[0010] Preferably, the alignment assembly includes a connecting rod and four sets of spray guns. The four sets of spray guns are fixed in a ring on one side surface of the connecting rod. One end of the connecting rod is fixedly connected to a rotating shaft, and the middle of the rotating shaft is fixedly connected to mating teeth. The mating teeth of the two sets of alignment assemblies mesh with each other, and the two ends of the rotating shaft are rotatably mounted on the trolley body.

[0011] Preferably, one end of the rotating shaft corresponding to a single alignment component is fixedly connected to a pin shaft, which passes through the trolley body and aligns with the transmission mechanism on one side.

[0012] Preferably, the transmission mechanism includes a motor, a spline rod, and a sleeve shaft. The motor is fixed on the trolley body, and the output shaft of the motor is connected to the spline rod through a first bevel gear set. The spline rod consists of two sets of bevel gears, with one set of bevel gears sliding on the surface of the spline rod. The sleeve shaft is fixed to one end of the spline rod, and the end of the sleeve shaft away from the spline rod is aligned and inserted with the pin shaft.

[0013] Preferably, the switching mechanism includes an electric push rod, a connecting seat, and a push rod. The connecting seat is fixed to the output end of the electric push rod. The electric push rod drives the connecting seat to move laterally inside the trolley body. One end of the connecting seat is movably connected to the sleeve shaft through a pressure bearing, and the other end of the connecting seat is movably sleeved on the surface of the push rod.

[0014] Preferably, the push rod slides through the surface of the trolley body, one side of the connecting seat is elastically connected to the trolley body through a pressure spring, one side of the push rod is fixedly connected to two sets of side slide plates at the position of the alignment assembly, one side of the side slide plate is slidably set on the rotating shaft of the two sets of alignment assemblies, and the surface of the side slide plate is fixedly connected to the abutment piece.

[0015] Preferably, the shifting mechanism further includes a transmission belt assembly and a damping block. The damping block is fixed to the transmission wheel at one end of the transmission belt assembly via a connecting rod. A mating block is provided at one end of the spline rod near the plane of the damping block. The damping block is aligned with the mating block. The transmission wheel at the other end of the transmission belt assembly is connected to the meshing teeth via a second bevel gear set. A meshing rod is fixed on the surface of the base, and the meshing teeth mesh with the meshing rod.

[0016] The beneficial effects of this invention are: This invention uses two sets of hoisting mechanisms below the overhead crane to lift T-shaped saddles. By controlling chains one, two, and three, the T-shaped saddles can be moved in a suspended state to change their posture, making it easier for the two sets of T-shaped saddles to be inserted into the port of the bent pipe. Then, the first chain is wound up to achieve a clamping operation on the entire bent pipe. Compared with traditional clamping and hoisting equipment, it does not rely on human intervention. It only requires the control panel to control the opening and closing of each unit of the hoisting mechanism. At the same time, the clamping operation is completed by the winding of the two sets of first chains and the posture control of the second and third chains. The operation is simple and suitable for hoisting and clamping bent pipes of various sizes and specifications. This invention, through its transmission mechanism and alignment components, allows the spline rod and sleeve shaft to rotate normally within the trolley body via the first bevel gear set after being driven by the motor. One end of the sleeve shaft directly drives a single set of rotating shafts to rotate via a pin shaft. The mating teeth in the middle of the two sets of rotating shafts mesh with each other, thus driving the two sets of rotating shafts to rotate in opposite directions. This causes the connecting rod as a whole to move in opposite directions, enabling the four sets of spray guns to align with the middle position of the bent pipe to complete the subsequent spraying operation. Compared with existing spraying operation units, the two sets of connecting rods correspond to a total of eight sets of spray guns, which can effectively spray the upper and lower curved surfaces of irregular pipes such as bent pipes separately. The operation is highly continuous. With the help of the hoisting mechanism and T-shaped saddle to suspend the bent pipe, the spraying operation does not need to spray one side first and then spray the other side through a complex flipping operation, ensuring the uniformity of the spraying and the continuity of the spraying operation, effectively improving the efficiency of the spraying operation. This invention, through a switching mechanism, allows the connecting seat to move directly within the trolley body after the electric push rod is activated. At this time, due to the movable connection between the sleeve shaft and the push rod at both ends of the connecting seat, the sleeve shaft and push rod move synchronously. Simultaneously, the push rod drives two sets of side slide plates to continuously slide on the rotating shaft surface until the contact plate presses against the mating teeth and the surface of a single set of connecting rods. At this point, the rotating shaft's rotational damping increases, achieving a stable connecting rod posture. Simultaneously, as the sleeve shaft drives the spline rod to move, it separates from the pin shaft, thus achieving transmission separation. Compared to existing technologies, this invention simultaneously provides rotational alignment and position locking, effectively satisfying the stability and adjustability requirements of spray gun painting operations. This invention utilizes a switching mechanism. When the docking block is moved synchronously by the spline rod, it will fit and press against the damping block. At this time, after the motor drives it again, the transmission effect will directly drive the transmission belt assembly to move through the tight fit between the docking block and the damping block. The transmission belt assembly is driven by the second bevel gear group to rotate the meshing teeth, which in turn mesh with the meshing rod on the surface of the base. In this way, the entire trolley body can slide laterally on the surface of the base, changing the position of the spray gun, thereby further satisfying the spraying operation of different positions of the bent pipe. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an anti-corrosion coating device for oil and gas transmission pipes proposed in this invention.

[0018] Figure 2 This is a schematic diagram of the hoisting mechanism of an anti-corrosion coating device for oil and gas pipelines proposed in this invention.

[0019] Figure 3 This is a schematic diagram of the base surface structure connection of an anti-corrosion coating device for oil and gas pipelines proposed in this invention.

[0020] Figure 4 This is a schematic diagram of the connection structure of the trolley assembly of an anti-corrosion coating device for oil and gas pipelines proposed in this invention.

[0021] Figure 5 This is a schematic plan view of the internal structure of the trolley body of an anti-corrosion coating device for oil and gas pipelines proposed in this invention.

[0022] Figure 6 This is a schematic diagram of the alignment assembly structure of an anti-corrosion coating device for oil and gas pipelines proposed in this invention.

[0023] Figure 7 This is a schematic diagram of the internal structure of the trolley body of an anti-corrosion coating device for oil and gas pipelines proposed in this invention.

[0024] Figure 8 This invention proposes an anti-corrosion coating device for oil and gas transmission pipelines. Figure 7 Enlarged schematic diagram of the structure at point A.

[0025] In the diagram: 1. Overhead crane; 2. Base; 3. Pipe bend; 4. Lifting mechanism; 5. T-saddle; 6. Trolley assembly; 7. Transmission mechanism; 8. Alignment assembly; 9. Switching mechanism; 10. Transposition mechanism; 41. Chain No. 1; 42. Chain No. 2; 43. Chain No. 3; 61. Trolley body; 62. Curved mounting bracket; 63. Actuating rod; 64. Brake pad; 65. Slide groove; 71. Electric motor; 72. First bevel gear group; 73. Spline rod; 74. Sleeve shaft; 81. Connecting rod; 82. Spray gun; 83. Rotating shaft; 84. Butt joint gear; 85. Pin shaft; 91. Electric push rod; 92. Connecting seat; 93. Push rod; 94. Pressure spring; 95. Side slide plate; 96. Abutment plate; 11. Transmission belt assembly; 12. Damping block; 13. Butt joint block; 14. Second bevel gear group; 15. Engaging tooth; 16. Engaging rod. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] refer to Figures 1-8The system includes a crane 1, a base 2, and a pipe bend 3. The crane 1 is the upper moving unit, providing the mounting base for suspension and attitude control. The base 2 is the lower base, supporting the sliding components and related transmission / positioning mechanisms. The pipe bend 3 is the pipe to be painted, such as a bend. The relative positions of the three are: crane 1 on top, base 2 below, and pipe bend 3 in between, receiving suspension from crane 1 and painting from base 2. T-shaped saddles 5 are connected to both sides of the bottom of crane 1 via lifting mechanisms 4. The two sets of lifting mechanisms 4 and T-shaped saddles 5 are related to the crane. The overhead crane 1 is arranged in a mirror image. The hoisting mechanism 4 can control the suspension posture of the T-shaped saddle 5. The two ends of the bent pipe 3 are suspended below the crane 1 through the T-shaped saddle 5. Here, the hoisting mechanisms 4 set on both sides of the bottom of the crane 1 are connected to the T-shaped saddle 5 respectively, and are arranged in a mirror image, forming a double-point suspension. The hoisting mechanism 4 is used to adjust the spatial posture of the T-shaped saddle 5, such as the angle and position of pitch, sway, or twist, so that the T-shaped saddle 5 can smoothly match the supporting parts at both ends of the bent pipe 3. When the T-shaped saddle 5 is adjusted to the matching posture by the hoisting mechanism 4, the two ends of the bent pipe 3 are supported by the T-shaped saddle 5 and The entire structure is suspended below the overhead crane 1, maintaining a stable and controllable suspended state without contacting the ground or roller conveyor. A trolley assembly 6 is slidably mounted on the side of the base 2. The trolley assembly 6, via a transmission mechanism 7, controls two sets of alignment components 8 to rotate in opposite directions at the center of the bent pipe 3 for calibrating the spraying angle. The trolley assembly 6, located on the side of the base 2 and capable of sliding, is a slidable carrier mounted on the side of the base, used to precisely position the spraying-related mechanisms near the spraying area. The transmission mechanism 7, mounted on the trolley assembly 6, transmits the driving force... The spray is transmitted to two sets of alignment components 8. Driven by the transmission mechanism 7, the two sets of alignment components 8 rotate in opposite directions and are arranged around the middle of the bent pipe 3. This allows for the calibration and adjustment of the incident angle of the spray gun group relative to the surface of the bent pipe 3, ensuring that the upper and lower curved surfaces of the bent pipe can form a suitable atomization incident angle and overlap trajectory according to process requirements. Through the combination of sliding positioning of the trolley component 6, linkage transmission of the transmission mechanism 7, and counter-rotation of the alignment components 8, the angle and orientation of the spray gun relative to the workpiece can be quickly and repeatedly adjusted, improving the uniformity and continuity of atomization coverage and reducing the reliance on manual reset and temporary fixtures.A switching mechanism 9 is also provided inside the trolley assembly 6, near the lower part of the transmission mechanism 7. The switching mechanism 9 changes the transmission direction of the transmission mechanism 7 and simultaneously limits and clamps the two sets of alignment components 8. Located inside the trolley assembly 6 and near the lower part of the transmission mechanism 7, the switching mechanism 9 is used to switch along the transmission path, thereby changing the transmission direction or state of the transmission mechanism 7 as needed. When the switching mechanism 9 is in the clamping or limiting state, it can mechanically limit and lock the relative position or angle of the two sets of alignment components 8, preventing spray gun attitude drift caused by vibration, pressure fluctuations, or changes in the curvature of the pipe surface during spraying. A shifting mechanism 10 is provided on one side of the trolley assembly 6. The shifting mechanism 10 is connected to the transmission mechanism 7 via a switching mechanism 9. The shifting mechanism 10 is located on one side of the trolley assembly 6 and establishes a transmission relationship with the transmission mechanism 7 through the switching mechanism 9, indicating that the movement of the shifting mechanism 10 can benefit from the power source of the transmission mechanism 7. The trolley assembly 6 can slide laterally on the side of the base 2 via the shifting mechanism 10. By driving the trolley assembly 6 to move laterally on the side of the base, the spraying coverage area of ​​the same workstation can be expanded, reducing repeated start-ups and repositioning of workpieces or equipment, and improving continuous operation efficiency and process cycle stability.

[0028] In this implementation plan: System Overview: The overhead crane 1 is positioned above the work area to provide a suspended installation foundation, the base 2 is fixed below to support the sliding and transmission components, and the bent pipe component 3 is located between the overhead crane 1 and the base 2 and maintains a controllable suspended state during the spraying process to ensure the spraying space and safe distance. Suspension and attitude control: The left and right sides of the crane 1 are respectively equipped with hoisting mechanisms 4 and connected to T-shaped saddles 5 to form a mirrored double-suspension structure. The hoisting mechanism 4 is used to adjust the spatial attitude of the T-shaped saddles 5 so that the T-shaped saddles 5 and the two ends of the bent pipe 3 can be reliably attached, thereby suspending the bent pipe 3 stably below the crane 1 to reduce the impact of off-center load and torsion on the consistency of spraying. Spraying angle calibration: A sliding trolley assembly 6 is set on the side of the base 2. A transmission mechanism 7 is installed on the trolley assembly 6 and connected to two sets of alignment assemblies 8. The transmission mechanism 7 drives the two sets of alignment assemblies 8 to rotate in opposite directions. The two sets of alignment assemblies 8 are arranged around the middle area of ​​the bent pipe 3 to meet the requirements of spraying incident angle calibration for surfaces with different curvatures and ensure uniform deposition of atomized particles. Switching and locking: A switching mechanism 9 is provided inside the trolley assembly 6 near the lower part of the transmission mechanism 7, which is used to switch or guide the transmission of the transmission mechanism 7; when it is necessary to maintain the spraying posture, the switching mechanism 9 limits and clamps the two sets of alignment components 8, thereby suppressing posture drift during the spraying process and improving spraying stability. Positioning and Covering: A positioning mechanism 10 is provided on one side of the trolley assembly 6. The positioning mechanism 10 establishes a transmission connection with the transmission mechanism 7 through the switching mechanism 9, thereby driving the trolley assembly 6 to slide laterally along the side of the base 2 after switching, realizing the linear positioning of the spraying unit to adapt to continuous spraying operations in different work stations and different areas.

[0029] refer to Figures 1-2 The hoisting mechanism 4 includes a second chain 42, two sets of first chains 41, and two sets of third chains 43. One end of each set of first chains 41 is fixed to both sides of the T-shaped saddle 5 near the intersection. The second chain 42 is fixed to the center line of the top surface of the T-shaped saddle 5 near the end. The two sets of third chains 43 are fixed to both sides of the T-shaped saddle 5 near the end. The fixing positions of the third chains 43 and the T-shaped saddle 5 are in the same plane as the fixing positions of the first chains 41 and the T-shaped saddle 5. The ends of the first chains 41, second chains 42, and third chains 43 away from the T-shaped saddle 5 are all wound up and unwound via an independent winding roller unit at the top of the overhead crane 1.

[0030] In this implementation scheme, the hoisting mechanism 4 is composed of three types of chain units: chain 41 is the first chain group, chain 42 is the second chain unit, and chain 43 is the third chain group. These three chains form an independently controllable multi-point suspension structure in space, each undertaking the task of adjusting tension in different directions, thereby achieving attitude control and hoisting balance of the T-shaped saddle 5. Specifically: Two sets of first chains 41 are fixed on both sides of the T-shaped saddle 5 and near their intersection, i.e., near the junction of the T-shaped saddle 5. This arrangement allows the first chains 41 to bear the main clamping and supporting tension, and maintains the longitudinal balance and anti-overturning capacity of the T-shaped saddle 5 through left-right symmetry. This arrangement of the first chains 41 helps to control the left-right horizontal posture of the T-shaped saddle 5 relative to the bent pipe 3, preventing swaying or overturning due to eccentric loading, and ensuring the uniformity of force during the insertion and clamping process of the bent pipe end. The second chain 42 is located near the end of the center line of the top surface of the T-shaped saddle 5, and is mainly used for control. The pitch angle of the T-shaped saddle 5 in the front-to-back direction can be adjusted by extending and retracting the second chain 42, changing the tilt angle of the T-shaped saddle 5 relative to the overhead crane 1. This allows it to achieve end posture matching for pipe bends 3 with different bending angles. When the angles at both ends of the pipe bend 3 are asymmetrical, the front-to-back posture can be corrected by adjusting the tension of the second chain 42, ensuring that both sets of T-shaped saddles 5 are simultaneously in contact with the end face of the pipe bend, improving the clamping tightness and stability during spraying operations. Two sets of third chains 43 are arranged at the ends of the T-shaped saddle 5 on both sides, forming auxiliary lifting points for adjusting the lateral torsional posture of the T-shaped saddle 5. The addition of chain 43 creates a three-point stable structure in the hoisting system, automatically distributing some of the tension when the pipe's posture changes, preventing excessive tension on a single chain, and improving suspension stability and coordination. The fixed points of chains 41 and 43 are on the same plane, ensuring the chain forces are directed within a geometric plane, achieving torque balance and posture symmetry. This coplanar arrangement prevents irregular torsion or three-dimensional skew during hoisting. Through this coplanar design, the tension generated by chains 41 and 43 during extension and retraction remains symmetrically distributed across the force plane. The upper ends of each chain are aligned with the overhead line. The independent winding roller unit on the top of the vehicle 1 is connected, and each roller unit can drive the lifting and tensioning of the corresponding chain independently. By controlling the winding and unwinding lengths of the three sets of chains separately, fine posture adjustment, flipping and clamping operations can be achieved in the same lifting point system. This independent winding control scheme allows each chain to undertake the task of tension adjustment in a specific direction, thereby achieving precise position and posture control of the T-shaped saddle 5 in the three-axis direction of space. Compared with the traditional co-drive suspension structure, this design can complete the automatic posture correction, clamping and flipping of the bent pipe without changing the lifting gear, improving the flexibility and safety of operation.

[0031] refer to Figures 3-5The trolley assembly 6 includes a trolley body 61 and a curved mounting bracket 62. The curved mounting bracket 62 is fixed to the side of the trolley body 61 near the base 2. A groove 65 is formed on the base 2 near the curved mounting bracket 62. The curved mounting bracket 62 slides in the groove 65. An actuator rod 63 is fixedly connected to one side of the curved mounting bracket 62. The output end of the actuator rod 63 passes through the curved mounting bracket 62 and is fixedly connected to a brake pad 64. A contact piece is provided on the side of the base 2 near the brake pad 64. The bottom of the trolley body 61 and the top of the curved mounting bracket 62 slide on the surface of the base 2 through pulleys.

[0032] In this embodiment, the trolley assembly 6 consists of a trolley body 61 and a curved mounting bracket 62. The trolley body 61 serves as the main load-bearing structure, used to mount the transmission mechanism 7 and the alignment assembly 8. The curved mounting bracket 62 is fixed to the side of the trolley body 61 near the base 2, forming a guiding connection with the base 2. A groove 65 is provided on the base 2 near the curved mounting bracket 62. The curved mounting bracket 62 is embedded in the groove 65 and can slide along its direction, thereby achieving linear guidance of the trolley assembly 6. An actuator rod 63 is fixedly mounted on one side of the curved mounting bracket 62. The output end of the actuator rod 63 passes through the curved mounting bracket 62 and is fixedly connected to the brake pad 64. A contact piece is provided on the side of the base 2 near the brake pad 64. Under the drive of the actuator rod 63, the brake pad 64 can engage with the contact piece to achieve braking or position detection. In addition, a pulley mechanism is provided between the bottom of the trolley body 61 and the top of the curved mounting bracket 62, so that the trolley assembly 6 can move on the surface of the base 2 by rolling, thereby reducing frictional resistance and improving movement stability. Through these structures, the trolley assembly 6 can achieve smooth lateral sliding under the guidance and constraint of the base 2. The operator can precisely lock or release the position by executing the actuator 63, ensuring that the alignment assembly 8 is reliably positioned and flexibly repositioned during operation, providing a repeatable support base for multi-angle spraying.

[0033] refer to Figure 3 , Figure 5 , Figure 6 and Figure 7 The alignment assembly 8 includes a connecting rod 81 and four sets of spray guns 82. The four sets of spray guns 82 are fixed in a ring on one side surface of the connecting rod 81. One end of the connecting rod 81 is fixedly connected to a rotating shaft 83, and the middle of the rotating shaft 83 is fixedly connected to a mating tooth 84. The mating teeth 84 corresponding to the two sets of alignment assemblies 8 mesh with each other. The two ends of the rotating shaft 83 are rotatably mounted on the trolley body 61. One end of the rotating shaft 83 corresponding to a single alignment assembly 8 is fixedly connected to a pin shaft 85, which passes through the trolley body 61 and aligns with the transmission mechanism 7 on one side.

[0034] In this embodiment, the alignment assembly 8 consists of a connecting rod 81 and four sets of spray guns 82. The four sets of spray guns 82 are fixedly arranged in a ring along one side of the connecting rod 81 to form a ring-shaped atomized coverage around the area to be sprayed during operation. One end of the connecting rod 81 is fixedly connected to a rotating shaft 83, and the middle of the rotating shaft 83 is fixedly connected to a mating tooth 84. The mating teeth 84 corresponding to the two sets of alignment assemblies 8 mesh with each other. The two ends of the rotating shaft 83 are rotatably mounted on the trolley body 61. One end of the rotating shaft 83 corresponding to a single alignment assembly 8 is fixedly connected to a pin shaft 85. The pin shaft 85 passes through the trolley body 61 and is aligned and inserted into the transmission mechanism 7 on one side to realize the input and output of transmission power. Through the above structure, the alignment assembly 8 is driven by the transmission mechanism 7. The lower drive connecting rod 81 rotates around the middle position of the bent pipe 3. During the rotation, four sets of spray guns 82 simultaneously spray atomized coating onto the surface of the bent pipe 3 to form a uniform coating layer. The two sets of alignment components 8 can achieve reverse synchronous rotation through the meshing action of the mating teeth 84, so that the upper and lower or inner and outer curved surfaces of the bent pipe 3 can be continuously sprayed in the same time period, thereby avoiding the uneven coating thickness caused by single-sided construction. The rotating shaft 83 can maintain stable operation during rotation through the rotating connection on the trolley body 61, avoiding spray trajectory errors caused by eccentricity or jump. The through setting of the pin shaft 85 ensures that the power transmission of the transmission mechanism 7 can be accurately transmitted to the alignment component 8, realizing reliable power input and efficient rotation output. The structural design of this embodiment enables the alignment component 8 to have synchronous and stable rotary spraying capability, which can improve the overall coating efficiency while ensuring the uniformity of spraying. It is suitable for anti-corrosion coating operations of bent pipes 3 with multiple specifications and curvatures.

[0035] refer to Figure 5 , Figure 7 and Figure 8 The transmission mechanism 7 includes a motor 71, a spline rod 73, and a sleeve shaft 74. The motor 71 is fixed on the trolley body 61. The output shaft of the motor 71 is connected to the spline rod 73 through the first bevel gear set 72. The spline rod 73 is composed of two sets of bevel gears. A single set of bevel gears slides on the surface of the spline rod 73. The sleeve shaft 74 is fixed at one end of the spline rod 73. The end of the sleeve shaft 74 away from the spline rod 73 is aligned and inserted with the pin shaft 85.

[0036] In this embodiment, during actual operation, when the motor 71 is in normal driving mode, the spline rod 73 rotates under the drive of the first bevel gear set 72, the sleeve shaft 74 and the pin shaft 85 are pressed together, and the power is transmitted to the rotating shaft 83 through the pin shaft 85, thereby driving the connecting rod 81 to rotate, realizing the rotation drive for the spraying operation. When it is necessary to switch states, the spline rod 73 slides axially, causing the sleeve shaft 74 to separate from the pin shaft 85. At this time, the transmission of the motor 71 no longer drives the connecting rod 81 to rotate, but instead, the axial displacement of the spline rod 73 drives the mating block 13 at its other end to fit with the damping block 12, thereby achieving the rotation drive for the spraying operation. When the mating block 13 and the damping block 12 are engaged, the rotational power of the motor 71 drives the trolley body 61 to slide laterally on the base 2, thereby realizing the repositioning movement of the spraying unit on the base. At the same time, during the axial sliding process, the spline rod 73 drives the push rod 93 to move synchronously through the connecting seat 92. When the push rod 93 moves, the contact piece 96 on the surface of the side slide plate 95 is pressed against the connecting rod 81, limiting and clamping the connecting rod 81. At this time, the connecting rod 81 is fixed in the current position to prevent rotation due to inertia or residual torque, ensuring the stability of the spraying position during the switching process. Through the above structure, the transmission mechanism 7 realizes the automatic switching between rotary drive and displacement sliding, and has both clutch and linkage control functions. This structure enables the spraying mechanism to achieve dynamic switching of power path between different working stages: when the sleeve shaft 74 and the pin shaft 85 are engaged, rotary spraying is performed, and when the two are separated, position adjustment and attitude locking are performed, avoiding complex external control mechanisms, realizing mechanical self-coordination between multiple actions, and ensuring the continuity of the spraying process and the stability of equipment operation.

[0037] refer to Figure 7 and Figure 8 The switching mechanism 9 includes an electric push rod 91, a connecting seat 92, and a push rod 93. The connecting seat 92 is fixed to the output end of the electric push rod 91. The electric push rod 91 drives the connecting seat 92 to move laterally inside the trolley body 61. One end of the connecting seat 92 is movably connected to the sleeve shaft 74 through a pressure bearing, and the other end of the connecting seat 92 is movably sleeved on the surface of the push rod 93. The push rod 93 slides through the surface of the trolley body 61. One side of the connecting seat 92 is elastically connected to the trolley body 61 through a pressure spring 94. One side of the push rod 93 is fixedly connected to two sets of side slide plates 95 at the position of the alignment assembly 8. One side of the side slide plate 95 is slidably mounted on the rotating shaft 83 of the two sets of alignment assemblies 8. The surface of the side slide plate 95 is fixedly connected to a contact piece 96.

[0038] In this embodiment, when the electric push rod 91 is started, the connecting seat 92 generates a lateral displacement within the trolley body 61, driving the push rod 93 to move synchronously. During the movement, the push rod 93 pushes the side slide plate 95 to slide along the direction of the rotating shaft 83, causing the contact piece 96 to gradually press against the connecting rod 81, thereby achieving the limiting and clamping of the connecting rod 81. When the spline rod 73 slides axially and separates from the pin shaft 85, the electric push rod 91 can cooperate with the synchronous action to press the contact piece 96 against the surface of the connecting rod 81, forming a stable attitude locking state, preventing the connecting rod 81 from rotating or shifting during the switching process. At this time, the disengagement action of the sleeve shaft 74 and the pin shaft 85, the contact action of the mating block 13 and the damping block 12, and the clamping action of the contact piece 96 against the connecting rod 81 can be completed simultaneously, forming a composite state of multi-mechanism coordinated switching. When the rotation drive needs to be restored, the electric push rod 91 reverses or stops driving, the connecting seat 92 returns to its original position under the elastic action of the pressure spring 94, the push rod 93 drives the side slide plate 95 to reset, and the contact piece 96 releases the limiting clamp on the connecting rod 81, restoring the connecting rod 81 to its free rotation state. Through this structure, the switching mechanism 9 realizes the automatic limiting and release functions in the spraying, repositioning, and posture locking processes. This mechanism uses the drive of the electric push rod 91 and the elastic reset of the pressure spring 94 to ensure that the limiting action is responsive and the reset is reliable, so that the connecting rod 81 can maintain a stable posture or achieve smooth rotation under different working conditions, improving the coordination of the device and the safety of operation.

[0039] refer to Figure 4 , Figure 5 and Figure 7 The shifting mechanism 10 also includes a transmission belt assembly 11 and a damping block 12. The damping block 12 is fixed to the transmission wheel at one end of the transmission belt assembly 11 via a connecting rod. A mating block 13 is provided at one end of the spline rod 73 near the plane of the damping block 12. The damping block 12 is aligned with the mating block 13. The transmission wheel at the other end of the transmission belt assembly 11 is connected to the meshing teeth 15 via the second bevel gear set 14. A meshing rod 16 is fixed on the surface of the base 2. The meshing teeth 15 mesh with the meshing rod 16.

[0040] In this embodiment, when the spline rod 73 slides axially and separates from the pin shaft 85, the far end of the spline rod 73 will drive the mating block 13 and the damping block 12 to fit together. At this time, the rotational power of the motor 71 is transmitted to the damping block 12 through the spline rod 73, and then the damping block 12 drives the transmission belt assembly 11 to generate synchronous movement. During the rotation, the transmission belt assembly 11 realizes power transmission through the second bevel tooth group 14 and the meshing tooth 15. The meshing action of the meshing tooth 15 and the meshing rod 16 causes the trolley body 61 to slide laterally on the surface of the base 2. Through the above structure, when the sleeve shaft 74 separates from the pin shaft 85 and the mating block 13 fits with the damping block 12, the power path automatically switches to drive the trolley body 61 to move, thereby realizing the repositioning action of the alignment component 8. When the spline rod 73 slides back in the opposite direction, the sleeve shaft 74 and the pin shaft 85 are pressed together again, the mating block 13 and the damping block 12 separate, and the power transmission path of the motor 71 returns to the rotation output state. At this time, the transmission belt assembly 11 stops driving the meshing teeth 15, and the lateral sliding of the trolley body 61 on the base 2 ends. As can be seen, the switching mechanism 10 achieves the switching linkage between rotary transmission and lateral transmission through the mechanical contact and separation of the docking block 13 and the damping block 12. This structure enables the transmission mechanism 7, the switching mechanism 9 and the switching mechanism 10 to form a coordinated relationship at the mechanical level: when the sleeve shaft 74 and the pin shaft 85 are engaged, rotational power is output; when the two are separated, the lateral drive path is switched through the docking block 13 and the damping block 12, and the connecting rod 81 is limited by the contact piece 96 to achieve automatic positioning and attitude stabilization of the spraying unit.

[0041] Working principle: First, the lifting mechanism 4 controls the T-shaped saddle 5 to lift the bent pipe component 3. The lifting mechanism 4 adjusts the extension and retraction posture of each set of first chain 41, second chain 42 and third chain 43 to clamp and suspend both ends of the bent pipe component 3 with the T-shaped saddle 5, and lifts the bent pipe component 3 to the working area below the alignment component 8. After the bent pipe component 3 is stably suspended, the transmission mechanism 7 starts, and the motor 71 outputs power through the first bevel gear set 72 and spline rod 73 to the sleeve shaft 74. Through the sleeve shaft 74 and the pin The clamping and mating of shaft 85 drives the rotating shaft 83 to rotate, thereby causing the connecting rod 81 and the spray gun 82 to flip, so that the alignment assembly 8 is aligned with the bent pipe 3. After the alignment assembly 8 completes the alignment action, the switching mechanism 9 is activated. The electric push rod 91 drives the connecting seat 92 to move laterally inside the trolley body 61. The connecting seat 92 pushes the push rod 93 to move, so that the side slide plate 95 slides on the rotating shaft 83 and the contact piece 96 is pressed against the connecting rod 81, thereby limiting the alignment assembly 8 and keeping it in place. In the stable state of the current posture, the spline rod 73 continues to slide axially, separating from the pin shaft 85, and causing the mating block 13 and the damping block 12 to engage with each other. The power of the motor 71 is transmitted to the second bevel gear group 14 and the meshing teeth 15 through the damping block 12 and the transmission belt assembly 11. Through the engagement of the meshing teeth 15 and the meshing rod 16, the entire trolley assembly 6 slides laterally on the surface of the base 2, thereby changing the spraying position of the alignment assembly 8 relative to the bent pipe 3. During the sliding process, the lifting mechanism 4 can... Continue adjusting the posture of the T-shaped saddle 5 to allow the bent pipe 3 to flip or adjust between different angle positions to match the spraying coverage of the alignment component 8. After the new spraying area is positioned, the spline rod 73 slides in the opposite direction, causing the sleeve shaft 74 and the pin shaft 85 to be pressed together again. The mating block 13 and the damping block 12 separate, and the switching mechanism 9 returns to its original position under the elastic action of the pressure spring 94. The contact piece 96 releases the limit on the connecting rod 81, and the transmission mechanism 7 resumes the rotation drive state to continue spraying other areas of the bent pipe 3.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A corrosion-resistant coating device for oil and gas transmission pipeline fittings, comprising an overhead crane (1), a base (2), and a bend (3), characterized in that, The bottom sides of the overhead crane (1) are connected to T-shaped saddles (5) by hoisting mechanisms (4). The two sets of hoisting mechanisms (4) and T-shaped saddles (5) are mirror images of the overhead crane (1). The hoisting mechanism (4) can control the suspension posture of the T-shaped saddles (5). The two ends of the bent pipe (3) are suspended below the overhead crane (1) by the T-shaped saddles (5). The base (2) is slidably provided with a trolley assembly (6). The trolley assembly (6) controls two sets of alignment assemblies (8) to rotate in opposite directions in the middle of the bent pipe (3) through the transmission mechanism (7) so as to calibrate the spraying angle of the bent pipe (3). A switching mechanism (9) is also provided on the inner side of the trolley assembly (6) near the transmission mechanism (7). The switching mechanism (9) changes the transmission direction of the transmission mechanism (7) and can also limit and hold the two sets of alignment components (8). A shifting mechanism (10) is provided on one side of the trolley assembly (6). The shifting mechanism (10) is connected to the transmission mechanism (7) through the switching mechanism (9). The trolley assembly (6) can slide laterally on the side of the base (2) through the shifting mechanism (10).

2. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 1, characterized in that, The hoisting mechanism (4) includes a second chain (42), two sets of first chains (41) and two sets of third chains (43). One end of the two sets of first chains (41) is fixed on both sides of the T-shaped saddle (5) and near the intersection. The second chain (42) is fixed on the center line of the top surface of the T-shaped saddle (5) and near the end. The two sets of third chains (43) are fixed on both sides of the T-shaped saddle (5) and near the end.

3. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 2, characterized in that, The fixed positions of chain No. 3 (43) and T-shaped saddle (5) and chain No. 1 (41) and T-shaped saddle (5) are in the same plane. The ends of chain No. 1 (41), chain No. 2 (42) and chain No. 3 (43) away from T-shaped saddle (5) are all wound and unwound through an independent winding roller unit at the top of the crane (1).

4. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 1, characterized in that, The trolley assembly (6) includes a trolley body (61) and a curved mounting bracket (62). The curved mounting bracket (62) is fixed on the side of the trolley body (61) near the base (2). A groove (65) is opened on the base (2) near the curved mounting bracket (62). The curved mounting bracket (62) slides in the groove (65). An actuator rod (63) is fixedly connected to one side of the curved mounting bracket (62). The output end of the actuator rod (63) passes through the curved mounting bracket (62) and is fixedly connected to a brake pad (64). A contact piece is provided on the side of the base (2) near the brake pad (64). The bottom of the trolley body (61) and the top of the curved mounting bracket (62) slide on the surface of the base (2) through pulleys.

5. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 1, characterized in that, The alignment assembly (8) includes a connecting rod (81) and four sets of spray guns (82). The four sets of spray guns (82) are fixed in a ring on one side surface of the connecting rod (81). One end of the connecting rod (81) is fixedly connected to a rotating shaft (83). The middle part of the rotating shaft (83) is fixedly connected to a mating tooth (84). The mating teeth (84) of the two sets of alignment assemblies (8) mesh with each other. The two ends of the rotating shaft (83) are rotatably mounted on the trolley body (61).

6. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 5, characterized in that, One end of the rotating shaft (83) corresponding to the single alignment component (8) is fixedly connected to a pin shaft (85), which passes through the trolley body (61) and is aligned with the transmission mechanism (7) on one side.

7. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 1, characterized in that, The transmission mechanism (7) includes a motor (71), a spline rod (73) and a sleeve shaft (74). The motor (71) is fixed on the trolley body (61). The output shaft of the motor (71) is connected to the spline rod (73) through the first bevel gear set (72). The spline rod (73) is composed of two sets of bevel gears. A single set of bevel gears slides on the surface of the spline rod (73). The sleeve shaft (74) is fixed at one end of the spline rod (73). The end of the sleeve shaft (74) away from the spline rod (73) is aligned and inserted with the pin shaft (85).

8. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 1, characterized in that, The switching mechanism (9) includes an electric push rod (91), a connecting seat (92) and a push rod (93). The connecting seat (92) is fixed to the output end of the electric push rod (91). The electric push rod (91) drives the connecting seat (92) to move laterally inside the trolley body (61). One end of the connecting seat (92) is movably connected to the sleeve shaft (74) through a pressure bearing. The other end of the connecting seat (92) is movably sleeved on the surface of the push rod (93).

9. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 8, characterized in that, The push rod (93) slides through the surface of the trolley body (61). The connecting seat (92) is elastically connected to the trolley body (61) through a pressure spring (94). The push rod (93) is fixedly connected to two sets of side slide plates (95) at the position of the alignment component (8). The side slide plates (95) are slidably set on the rotating shaft (83) of the two sets of alignment components (8). The side slide plate (95) is fixedly connected to the surface of the side slide plate (95).

10. The anti-corrosion coating device for oil and gas transmission pipelines according to claim 1, characterized in that, The shifting mechanism (10) also includes a transmission belt assembly (11) and a damping block (12). The damping block (12) is fixed to the transmission wheel at one end of the transmission belt assembly (11) via a connecting rod. A mating block (13) is set at one end of the spline rod (73) near the plane position of the damping block (12). The damping block (12) is aligned with the mating block (13). The transmission wheel at the other end of the transmission belt assembly (11) is connected to the meshing teeth (15) via the second bevel gear group (14). The meshing rod (16) is fixed on the surface of the base (2). The meshing teeth (15) mesh with the meshing rod (16).

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