A plastic coating baking device for the inner wall of a plastic-coated steel pipe

Abstract

This utility model discloses a plastic coating baking device for the inner wall of plastic-coated steel pipes in the field of plastic-coated steel pipe production technology. It aims to solve the problems of inconvenience, low efficiency, unstable drying quality, and high energy consumption associated with traditional drying methods for long pipes. The baking mechanism is equipped with heating wires, a servo motor, and fan blades. The heating wires generate heat, and the servo motor drives the fan blades to rotate, ensuring that hot air is evenly blown onto the inner wall of the pipe. This effectively avoids uneven heat distribution, ensuring uniform heating and curing of the plastic coating, and improving product consistency and reliability. The walking mechanism, with a connecting block and sleeve hinged to a connecting rod, along with a threaded rod and a handle, allows for flexible adjustment of the position of the walking wheel assembly, enabling stable movement within pipes of different diameters without additional pipe adjustments or component replacements. This significantly enhances applicability and versatility, and reduces equipment procurement costs. Furthermore, the device has a compact overall structure and high integration, greatly reducing the floor space required and optimizing the production layout.

Description

Technical Field

[0001] This utility model relates to the field of plastic-coated steel pipe production technology, specifically a plastic coating and baking device for the inner wall of plastic-coated steel pipe. Background Technology

[0002] With the development of modern industry, plastic-coated steel pipes have been widely used in many fields, such as construction, petroleum, chemical, and municipal engineering. The quality of the inner plastic coating layer plays a crucial role in the pipe's corrosion resistance, service life, and transportation efficiency. To ensure that the plastic coating layer can fully cure and achieve the expected performance indicators, drying the inner wall of the plastic-coated steel pipe has become an indispensable process.

[0003] Traditional drying methods mainly include suspended baking devices, hot air circulating ovens, and manually operated drying equipment that extends into the ductwork. Suspended baking devices are inconvenient to operate in long ducts, involving cumbersome hanging and moving, and occupying space. Hot air circulating ovens are inefficient for drying long ducts, requiring multiple drying stages, resulting in inconsistent curing, large footprint, uneven heat distribution, and high energy consumption. Manually operated drying equipment is labor-intensive, inefficient, and difficult to precisely control parameters, leading to unstable curing quality.

[0004] To address the aforementioned issues, this application provides a plastic coating baking device for the inner wall of a plastic-coated steel pipe. Utility Model Content

[0005] The purpose of this utility model is to provide a plastic coating baking device for the inner wall of a plastic-coated steel pipe in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A plastic coating baking device for the inner wall of a plastic-coated steel pipe includes a traveling mechanism and a baking mechanism, wherein: The walking mechanism includes a mounting block, at least three walking wheel assemblies, and a drive assembly. Several walking wheel assemblies are evenly mounted on the outer side of the mounting block, and the drive assembly is mounted on the mounting block and is used to drive one of the walking wheel assemblies to run. The baking mechanism is installed at the front end of the mounting block and is used to bake the inner wall of the plastic-coated steel pipe.

[0007] Furthermore, the walking wheel assembly includes a connecting block mounted on the mounting block, on which at least one roller is rotatably mounted.

[0008] Furthermore, the drive assembly includes a drive motor mounted on one of the connecting blocks, a drive wheel fixedly sleeved on the output end of the drive motor, a driven wheel fixedly sleeved on the shaft of one of the rollers, an integral connecting belt sleeved between the driven wheel and the drive wheel, and a rechargeable battery electrically connected to the drive motor at the front end of the mounting block.

[0009] Furthermore, the mounting block has an internal mounting cavity, and the outer side of the mounting block has several sliding grooves that are all connected to the mounting cavity. The number of sliding grooves is the same as the number of connecting blocks and they correspond one-to-one. The connecting blocks slide inside the corresponding sliding grooves. A threaded rod is rotatably mounted on the inner wall of the mounting cavity. A sleeve is threaded onto the threaded rod. A connecting rod is hinged between the connecting block and the sleeve. The end of the threaded rod facing away from the baking mechanism moves through the mounting block and is fixed with a handle.

[0010] Furthermore, the baking mechanism includes a sleeve fixed to the front end of the mounting block, the battery is located inside the sleeve, a mounting plate is fixed to the outer periphery of the sleeve facing away from the mounting block, a device plate is fixed to the side of the mounting plate facing away from the sleeve by a mounting rod, and a heating wire electrically connected to the battery is connected between the device plate and the mounting plate.

[0011] Furthermore, a servo motor electrically connected to the battery is disposed inside the sleeve, and the output end of the servo motor faces away from the mounting block and is fixed with fan blades.

[0012] Furthermore, the number of the walking wheel assemblies is four.

[0013] Furthermore, each of the three connecting blocks not connected to the drive motor includes a slider that slides inside the groove. The connecting rod is hinged to the slider. An adjusting plate is movably disposed on the side of the slider facing away from the connecting rod. The roller is rotatably mounted on the adjusting plate. A spring is connected between the adjusting plate and the slider. A guide rod is fixed on the adjusting plate, which is disposed along the length direction of the spring and whose end is movably inserted into the slider.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This solution adopts a self-propelled design, which allows the device to move autonomously inside the plastic-coated steel pipe and carry out drying operations. It overcomes the disadvantages of suspended baking devices, such as inconvenience in operating long pipes, cumbersome suspension and movement, and the low efficiency of hot air circulating ovens that require segmented drying. It eliminates the need for frequent manual adjustment of pipe positions or segmented processing, achieving a continuous and efficient drying process, significantly improving work efficiency, saving labor costs, and meeting the drying needs of long pipes.

[0015] 2. In this solution, the baking mechanism is equipped with heating wire, servo motor and fan blades. After the heating wire is energized and heats up, the servo motor drives the fan blades to rotate, so that the hot air is blown evenly to the inner wall of the pipe. This effectively avoids the problem of uneven heat distribution caused by traditional hot air circulating ovens, ensuring that the coating layer is heated evenly and cured stably, and improving the consistency and reliability of product quality.

[0016] 3. In this solution, the connecting block and the sleeve in the walking mechanism are hinged by the connecting rod. Rotating the handle causes the threaded rod to rotate, which in turn causes the sleeve to rotate the connecting rod, thereby moving the connecting block along the slide groove and adjusting the position of the walking wheel assembly. This enables the device to move stably in pipes of different diameters without the need for additional pipe adjustments or replacement of device components, greatly enhancing its applicability and versatility and reducing the equipment procurement costs for enterprises.

[0017] 4. The overall structure of the device in this solution is ingeniously designed, with the walking mechanism and baking mechanism compactly integrated. Compared with traditional large-scale drying equipment, it significantly reduces the floor space and optimizes the layout of the production site. At the same time, the combination of electric heating wire and servo motor heating method is highly targeted, and the heat is concentrated on the inner wall of the pipe, reducing energy consumption and improving energy utilization efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This utility model Figure 1 A three-dimensional sectional view; Figure 3 This utility model Figure 1 A three-dimensional structural diagram of the middle section; Figure 4 This utility model Figure 1 A three-dimensional structural diagram of another part of the structure.

[0019] In the diagram: 1. Walking mechanism; 11. Mounting block; 111. Mounting cavity; 112. Slide groove; 113. Threaded rod; 114. Sleeve; 115. Connecting rod; 116. Throttle; 12. Walking wheel assembly; 121. Connecting block; 1211. Slider; 1212. Adjusting plate; 1213. Spring; 1214. Guide rod; 122. Roller; 13. Drive assembly; 131. Drive motor; 132. Drive wheel; 133. Driven wheel; 134. Linkage belt; 135. Battery; 2. Baking mechanism; 21. Sleeve; 22. Mounting plate; 23. Mounting rod; 24. Device plate; 25. Heating wire; 26. Servo motor; 27. Fan blade. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] This application provides a plastic coating baking device for the inner wall of plastic-coated steel pipes, mainly to address the problems of traditional drying methods, which include suspended baking devices, hot air circulating ovens, and manually operated drying equipment inserted deep into the pipe. Suspended baking devices are inconvenient for long pipes, involving cumbersome hanging and moving, and occupying space. Hot air circulating ovens are inefficient for long pipes, requiring multiple drying stages, resulting in uneven curing, large footprint, uneven heat distribution, and high energy consumption. Manually operated drying equipment is labor-intensive, inefficient, and difficult to precisely control parameters, leading to unstable curing quality. The following technical solution is provided, which will be discussed in conjunction with... Figures 1-4 Please provide a detailed explanation: A plastic coating baking device for the inner wall of a plastic-coated steel pipe mainly includes a traveling mechanism 1 and a baking mechanism 2, wherein: The walking mechanism 1 includes a mounting block 11, at least three walking wheel assemblies 12, and a drive assembly 13. Several walking wheel assemblies 12 are evenly mounted on the outer side of the mounting block 11, and the drive assembly 13 is mounted on the mounting block 11 and is used to drive one of the walking wheel assemblies 12. This design enables the device to walk autonomously inside the plastic-coated steel pipe without the need for frequent manual adjustment of the pipe position or segmentation. The operation is extremely convenient, and it can achieve a continuous and efficient drying process, significantly improving work efficiency and effectively reducing labor costs. It is especially suitable for drying operations of long pipes. The baking mechanism 2 is installed at the front end of the mounting block 11 and is used to bake the inner wall of the plastic-coated steel pipe. When the drying operation is carried out, the baking mechanism 2 is started and begins to work. Specifically, when a long pipe needs to be dried, the operator places the device inside the plastic-coated steel pipe to be dried. The drive component 13 drives one of the walking wheel components 12 to run, thereby driving the device to move autonomously along its axis inside the pipe. At the same time, the baking mechanism 2 is powered on and bakes the inner wall of the plastic-coated steel pipe. Since the device can move autonomously inside the pipe, it can complete the drying operation of a long pipe in one go, avoiding the curing difference problem caused by traditional segmented drying, ensuring uniform heating and stable curing of the plastic coating, and greatly improving the consistency and reliability of product quality.

[0022] For details, please refer to Figure 2 and Figure 3 The traveling wheel assembly 12 includes a connecting block 121 mounted on the mounting block 11. At least one roller 122 is rotatably mounted on the connecting block 121. In this embodiment, there are two rollers 122. The rollers 122 drive the device to move inside the pipe.

[0023] The drive assembly 13 includes a drive motor 131 mounted on one of the connecting blocks 121. A drive wheel 132 is fixedly sleeved on the output end of the drive motor 131. A driven wheel 133 is fixedly sleeved on the shaft of one of the rollers 122. An integral connecting belt 134 is sleeved between the driven wheel 133 and the drive wheel 132. A rechargeable battery 135 that is electrically connected to the drive motor 131 is provided at the front end of the mounting block 11. Once the device is placed inside the plastic-coated steel pipe, the drive motor 131 is started. The drive motor 131 drives the drive wheel 132 to rotate. The drive wheel 132 drives the driven wheel 133 to rotate through the linkage belt 134, which in turn causes the roller 122, which is fixedly connected to the driven wheel 133, to rotate. The roller 122 contacts the inner wall of the plastic-coated steel pipe and generates friction, which propels the device to move autonomously along the axial direction inside the pipe. This autonomous movement design allows the device to complete the drying operation of a long pipe in one go, without the need for frequent manual adjustment of the pipe position or segmentation. The operation is extremely convenient, which can significantly improve work efficiency and effectively reduce labor costs. The rechargeable and dischargeable design of the battery 135 enables the device to operate independently without an external power source, further enhancing the device's flexibility and applicability. In actual operation, operators can rationally plan the device's travel path and drying time according to the pipeline length and drying requirements. By controlling the speed and running time of the drive motor 131, the operator can precisely adjust the device's travel speed and drying degree within the pipeline, ensuring that the plastic coating can be fully and evenly heated and cured, thereby improving the consistency and reliability of product quality.

[0024] Further, please refer to Figure 2 and Figure 3 The mounting block 11 has an internal structure with a mounting cavity 111. The outer side of the mounting block 11 has several sliding grooves 112 that are all connected to the mounting cavity 111. The number of sliding grooves 112 is the same as the number of connecting blocks 121 and they correspond one-to-one. The connecting blocks 121 slide in the corresponding sliding grooves 112. A threaded rod 113 is rotatably mounted on the inner wall of the mounting cavity 111. A sleeve 114 is threaded on the threaded rod 113. A connecting rod 115 is hinged between the connecting block 121 and the sleeve 114. The end of the threaded rod 113 facing away from the baking mechanism 2 moves through the mounting block 11 and is fixed with a handle 116. In actual operation, when it is necessary to adjust the device to adapt to pipes of different diameters, the operator only needs to turn the handle 116. This action drives the threaded rod 113 to rotate in the mounting cavity 111. As the threaded rod 113 rotates, the sleeve 114 moves linearly along the threaded rod 113. Through the transmission of the connecting rod 115, the connecting block 121 is displaced in the slide groove 112, thereby driving the overall position adjustment of the traveling wheel assembly 12. This ingenious mechanical transmission design enables the device to quickly adapt to and stably position itself in pipes of different diameters.

[0025] In this embodiment, please refer to Figure 2 and Figure 4 The baking mechanism 2 includes a sleeve 21 fixed on the front end of the mounting block 11. The sleeve 21 not only supports and protects the internal components, but also cleverly houses the battery 135 inside, achieving efficient use of space and ensuring the compactness of the entire device structure. A mounting plate 22 is fixed on the outer periphery of the sleeve 21 facing away from the mounting block 11. A device plate 24 is fixed on the side of the mounting plate 22 facing away from the sleeve 21 by a mounting rod 23. A heating wire 25 electrically connected to the battery 135 is connected between the device plate 24 and the mounting plate 22. As a key heating element of the baking mechanism 2, the heating power of the heating wire 25 can be precisely configured according to the actual drying needs to adapt to the curing requirements of different plastic coatings. In actual operation, when the device moves inside the plastic-coated steel pipe, the heating wire 25 is energized and generates heat to uniformly heat the plastic coating on the inner wall of the pipe, ensuring that the plastic coating can be fully cured and improving the corrosion resistance and service life of the product.

[0026] Furthermore, the sleeve 21 is equipped with a servo motor 26 electrically connected to the battery 135. The output end of the servo motor 26 faces away from the mounting block 11 and is fixed with a fan blade 27. When the heating wire 25 is energized and generates heat, the servo motor 26 runs synchronously, and its output end drives the fan blade 27 to rotate. The rotation of the fan blade 27 generates airflow, which blows the heat generated by the heating wire 25 evenly onto the inner wall of the plastic-coated steel pipe, promoting the circulation of hot air inside the pipe and ensuring that the plastic coating layer can be heated evenly. This design not only improves the heat transfer efficiency, but also effectively avoids the curing difference problem caused by uneven heat distribution in traditional drying methods, thereby ensuring the stable curing of the plastic coating layer and improving the consistency and reliability of product quality.

[0027] Please refer to this solution. Figure 2 and Figure 3 The number of walking wheel components 12 is four, which makes them more stable when moving; The three connecting blocks 121 that are not connected to the drive motor 131 each include a slider 1211 that slides inside the slide groove 112. A connecting rod 115 is hinged to the slider 1211. An adjusting plate 1212 is movably provided on the side of the slider 1211 facing away from the connecting rod 115. A roller 122 is rotatably mounted on the adjusting plate 1212. A spring 1213 is connected between the adjusting plate 1212 and the slider 1211. A guide rod 1214 is fixed on the adjusting plate 1212, which is arranged along the length of the spring 1213 and whose end is movably inserted into the slider 1211. When the device moves inside the plastic-coated steel pipe, the roller 122 contacts the inner wall of the pipe and generates pressure. At this time, the spring 1213 can be appropriately compressed or extended according to the shape and unevenness of the inner wall of the pipe, so that the roller 122 can fit tightly and evenly against the inner wall of the pipe, thereby improving the stability and passability of the device during movement. The guide rod 1214 ensures the accuracy of the movement direction of the adjusting plate 1212 under the action of the spring 1213, avoiding the offset or jamming of the adjusting plate 1212, further enhancing the reliability and adaptability of the device. This design enables the device to better cope with the unevenness of the inner wall of the pipe and obstacles, ensuring the smooth progress of the drying operation.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A plastic coating baking device for the inner wall of a plastic-coated steel pipe, comprising a traveling mechanism (1) and a baking mechanism (2), characterized in that, in: The walking mechanism (1) includes a mounting block (11), no less than three walking wheel assemblies (12) and a drive assembly (13). Several of the walking wheel assemblies (12) are evenly mounted on the outer side of the mounting block (11), and the drive assembly (13) is mounted on the mounting block (11) and is used to drive one of the walking wheel assemblies (12) to run. The baking mechanism (2) is installed at the front end of the mounting block (11) and is used to bake the inner wall of the plastic-coated steel pipe; The walking wheel assembly (12) includes a connecting block (121) mounted on the mounting block (11), and at least one roller (122) is rotatably mounted on the connecting block (121). The drive assembly (13) includes a drive motor (131) mounted on one of the connecting blocks (121), a drive wheel (132) is fixedly sleeved on the output end of the drive motor (131), a driven wheel (133) is fixedly sleeved on the shaft of one of the rollers (122), an integral connecting belt (134) is sleeved between the driven wheel (133) and the drive wheel (132), and a rechargeable battery (135) electrically connected to the drive motor (131) is provided at the front end of the mounting block (11). The mounting block (11) has an internal mounting cavity (111). The outer side of the mounting block (11) has a number of sliding grooves (112) that are connected to the mounting cavity (111). The number of sliding grooves (112) is the same as the number of connecting blocks (121) and they correspond one-to-one. The connecting blocks (121) slide inside the corresponding sliding grooves (112). A threaded rod (113) is rotatably mounted on the inner wall of the mounting cavity (111). A sleeve (114) is threaded onto the threaded rod (113). A connecting rod (115) is hinged between the connecting block (121) and the sleeve (114). The end of the threaded rod (113) facing away from the baking mechanism (2) moves through the mounting block (11) and is fixed with a throttle (116).

2. The plastic coating baking device for the inner wall of a plastic-coated steel pipe according to claim 1, characterized in that: The baking mechanism (2) includes a sleeve (21) fixed on the front end of the mounting block (11), the battery (135) is located inside the sleeve (21), a mounting plate (22) is fixed on the outer periphery of the sleeve (21) facing away from the mounting block (11), and a device plate (24) is fixed on the side of the mounting plate (22) facing away from the sleeve (21) by a mounting rod (23). A heating wire (25) electrically connected to the battery (135) is connected between the device plate (24) and the mounting plate (22).

3. The plastic coating baking device for the inner wall of a plastic-coated steel pipe according to claim 2, characterized in that: The sleeve (21) is equipped with a servo motor (26) that is electrically connected to the battery (135). The output end of the servo motor (26) faces away from the mounting block (11) and is fixed with a fan blade (27).

4. The plastic coating baking device for the inner wall of a plastic-coated steel pipe according to claim 1, characterized in that: The number of the walking wheel assembly (12) is four.

5. The plastic coating baking device for the inner wall of a plastic-coated steel pipe according to claim 4, characterized in that: Three of the connecting blocks (121) that are not connected to the drive motor (131) each include a slider (1211) that slides inside the slide groove (112). The connecting rod (115) is hinged to the slider (1211). An adjusting plate (1212) is movably provided on the side of the slider (1211) facing away from the connecting rod (115). The roller (122) is rotatably mounted on the adjusting plate (1212). A spring (1213) is connected between the adjusting plate (1212) and the slider (1211). A guide rod (1214) is fixed on the adjusting plate (1212) and is arranged along the length direction of the spring (1213) and its end is movably inserted into the slider (1211).

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