A ductile cast iron water supply pipe inner wall coating heat treatment device

Abstract

A ductile cast iron water supply pipe inner wall coating heat treatment device, including a supporting roller and two heating devices, the supporting roller is provided with at least two and is arranged on the ground in parallel, each supporting roller includes a roller frame and at least two rotating rollers for supporting the ductile cast iron water supply pipe, one of the supporting rollers is provided with a rotating drive device to drive one of the rotating rollers on the supporting roller to rotate, the ductile cast iron water supply pipe is placed on the rotating rollers of the supporting roller, and the two heating devices are respectively arranged in the horizontal direction and are arranged at the two ends of the ductile cast iron water supply pipe, the heating device can be inserted into the ductile cast iron water supply pipe from the two ends of the ductile cast iron water supply pipe and can move and heat while heat treating the inner wall coating of the ductile cast iron water supply pipe. The device realizes accurate heating of the coating by arranging the horizontally movable heating devices at the two ends of the water supply pipe, and avoids the problems of local overheating or underheating caused by poor heat control in the traditional overall heating mode.

Description

Technical Field

[0001] This utility model relates to the technical field of ductile iron pipe manufacturing equipment, specifically to a heat treatment device for coating the inner wall of a ductile iron water supply pipe. Background Technology

[0002] In the construction and maintenance of water supply systems, ductile iron water supply pipes, with their excellent mechanical properties and corrosion resistance, have become an indispensable key material. However, to further improve their service life and functionality, the inner wall of ductile iron water supply pipes often needs to be coated with a special chemical or metallic coating. These coatings play an important role in enhancing the wear resistance and corrosion resistance of the pipe's inner wall. However, the performance of the coating depends not only on its material composition but also closely on its subsequent heat treatment process. Proper heat treatment can promote the bonding between the coating and the substrate, improve the coating's density and stability, thereby ensuring the long-term safe operation of the water supply system.

[0003] Currently, the common method used in the industry for heat treatment of the inner wall coating of ductile iron water supply pipes is to push the entire pipe into a large heating furnace for overall heating. While this method can achieve heat treatment of the coating, it has several drawbacks. First, overall heating consumes a large amount of energy and has low heating efficiency because heat needs to be transferred gradually from the outside of the pipe to the inside, resulting in significant heat loss. Second, overall heating makes it difficult to ensure the controllability of the heating of the inner wall coating, easily causing localized overheating or underheating, which in turn affects the quality and performance of the coating. In addition, large heating furnaces occupy a large area, require high equipment investment, and are complex to operate, which is detrimental to production efficiency and cost control.

[0004] With the continuous advancement of industrial technology, the requirements for heat treatment of the inner wall coating of ductile iron water supply pipes are becoming increasingly stringent. How to improve heat treatment efficiency and reduce energy consumption and costs while ensuring coating quality has become an urgent problem to be solved. Traditional integral heating methods are no longer sufficient to meet the needs of modern industrial production, necessitating a new type of heat treatment device to achieve precise and efficient heating of the inner wall coating of ductile iron water supply pipes.

[0005] To address the aforementioned problems, this utility model proposes a heat treatment device for the coating of the inner wall of a ductile iron water supply pipe. Utility Model Content

[0006] To address the aforementioned issues, this invention provides a heat treatment device for the inner wall coating of ductile iron water supply pipes. This device achieves precise heating of the coating by installing horizontally movable heating devices at both ends of the water supply pipe. The heat can be directly applied to the coating, avoiding the need for external heat transfer in traditional overall heating methods and the problems of local overheating or underheating caused by poor heat transfer control. This helps to improve the density and stability of the coating, enhance the bonding force between the coating and the substrate, and thus improve the service life and performance of the coating.

[0007] The technical solution of this utility model is as follows:

[0008] A heat treatment device for coating the inner wall of a ductile iron water supply pipe includes a support roller and two heating devices. At least two support rollers are arranged parallel to each other on the ground. Each support roller includes a roller frame and at least two rotating rollers for supporting the ductile iron water supply pipe. One of the support rollers is equipped with a rotation drive device to drive one of the rotating rollers on the support roller to rotate. The ductile iron water supply pipe is placed on the rotating roller of the support roller. The two heating devices are respectively arranged at both ends of the ductile iron water supply pipe that can move horizontally. The heating devices can be inserted into the ductile iron water supply pipe from both ends and can move and heat simultaneously during the heat treatment of the coating on the inner wall of the ductile iron water supply pipe.

[0009] Furthermore, a groove is provided at the top of the roller frame to fit the outer clearance of the ductile iron water supply pipe. The cross-section of the groove is semi-circular. All the grooves of the supporting rollers are concentric. A roller groove is provided in the middle of the groove of each supporting roller, and the rotating roller is installed in the roller groove.

[0010] Furthermore, each support roller has two rotating rollers, which are symmetrically arranged with respect to the vertical center of the groove, and the two ends of the rotating rollers are mounted on the side wall of the groove by bearings.

[0011] Furthermore, the rotation drive device includes a rotation motor, which is fixedly placed on the ground. The rotation drive gear is fixedly mounted on the output shaft of the rotation motor, and a rotation driven gear that meshes with the rotation drive gear is fixedly connected to the end of one of the rollers of the support roller.

[0012] Furthermore, the rotating motor is fixedly installed on a rotating motor support, and the rotating motor support is fixedly installed on the ground.

[0013] Furthermore, the heating device is fixed to the end of the long rod, the long rod is fixedly mounted on the slider, and a guide rail that cooperates with the slider is fixedly mounted on the ground.

[0014] Furthermore, the long rod can be mounted on the slider via a bracket.

[0015] Furthermore, a walking drive device can be installed on the slider.

[0016] Furthermore, the walking drive device includes a walking motor, a walking gear, and a rack. The walking motor is fixedly mounted on the slider, the walking gear is fixedly connected to the output shaft of the walking motor, and a rack that meshes with the walking gear is fixedly installed on the ground.

[0017] Alternatively, the heating device can be an electric heating wire or an induction heating coil.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model discloses a heat treatment device for the inner wall coating of a ductile iron water supply pipe. This device achieves precise heating of the coating by setting horizontally movable heating devices at both ends of the water supply pipe. The center of the heating device is concentric with the center of the water supply pipe, ensuring that heat can be applied evenly and directly to the coating, avoiding the problems of local overheating or underheating caused by poor heat control or uneven heat transfer in traditional overall heating methods. This helps to improve the density and stability of the coating, enhance the bonding force between the coating and the substrate, thereby improving the service life and performance of the coating.

[0020] 2. This utility model discloses a heat treatment device for the inner wall coating of ductile iron water supply pipes. This device has heating devices installed at both ends of the water supply pipe, allowing simultaneous heating from both ends. It can also move and heat simultaneously during the heat treatment of the inner wall coating of the ductile iron water supply pipe, significantly improving heating efficiency. Compared to installing only one heating device at one end, simultaneous heating at both ends shortens the heat treatment time, improves production efficiency, and reduces the length each heating device needs to extend into the workpiece, optimizing the workshop layout. Furthermore, because the heating devices can more quickly control heating time and temperature, overheating and energy waste are avoided, further improving production efficiency.

[0021] 3. This utility model discloses a heat treatment device for the inner wall coating of ductile iron water supply pipes. This heat treatment device for the inner wall coating of ductile iron water supply pipes significantly reduces energy consumption through precise heating and efficient heating technology. The heat is applied directly to the coating, reducing heat loss and improving energy utilization. At the same time, since the heating device can more conveniently and directly control the heating power and temperature, unnecessary energy waste is avoided, and production costs are reduced. In addition, the device has a compact structure and small footprint, reducing equipment investment and space occupation, further reducing production costs.

[0022] 4. This utility model discloses a heat treatment device for coating the inner wall of a ductile iron water supply pipe. This heat treatment device for coating the inner wall of a ductile iron water supply pipe realizes the horizontal movement of the heating device through a slider and guide rail mechanism, which is simple and quick to operate. The walking drive device adopts a combination of walking motor, gear and rack to realize the automated movement and positioning of the heating device, which improves the convenience of operation and processing accuracy. At the same time, the design of the support roller enables the water supply pipe to be placed stably and rotated easily, which further facilitates the uniform heating of the workpiece and simplifies the operation process.

[0023] 5. The present invention discloses a heat treatment device for coating the inner wall of a ductile iron water supply pipe. The device features an optimized long rod structure with heating at both ends: if only one heating device is set at one end, the long rod will be very long, which may lead to structural instability and inconvenience in operation. However, by setting heating devices at both ends, the problem of excessively long rods is avoided, making the device structure more compact and stable. At the same time, heating at both ends simultaneously also improves heating efficiency and further optimizes the performance of the device. Attached Figure Description

[0024] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of the structure of a heat treatment device for coating the inner wall of a ductile iron water supply pipe according to an embodiment of the present invention.

[0027] Figure 2 for Figure 1 Sectional view of AA;

[0028] Figure 3 for Figure 2 Enlarged section view of the middle section (BB);

[0029] Figure 4 for Figure 1 CC section view.

[0030] The components represented by the various reference numerals in the diagram are:

[0031] This utility model includes: 100, ductile iron water supply pipe; 200, support roller; 201, roller frame; 2011, pipe groove; 2012, roller groove; 202, rotating roller; 203, bearing; 204, rotating motor; 205, rotating drive gear; 206, rotating driven gear; 207, rotating motor support; 300, guide rail; 400, slider; 500, bracket; 600, long rod; 700, heating device; 800, walking motor; 900, walking gear; 1100, rack; 1200, ground. Detailed Implementation

[0032] Example 1

[0033] like Figure 1 As shown, the heat treatment device for coating the inner wall of ductile iron water supply pipe mainly consists of a support roller 200, a heating device 700, a long rod 600, a slider 400, a guide rail 300, a bracket 500, a rotation drive device, and a walking drive device.

[0034] Two support rollers 200 are set parallel to each other on the ground 1200 to support the ductile iron water supply pipe 100.

[0035] like Figure 2 and Figure 3 As shown, the support roller 200 includes a roller frame 201 and a rotating roller 202. In this embodiment, a pipe groove 2011 is provided on the top of the roller frame 201, which is in clearance with the outer shape of the ductile iron water supply pipe 100. The cross-section of the pipe groove 2011 is semi-circular. The pipe grooves 2011 of the two support rollers 200 are concentric to ensure that the water supply pipe can be placed stably.

[0036] Each support roller 200 has a roller groove 2012 in the middle of the tube groove 2011. Two rotatable rollers 202 are installed in the roller groove 2012. The two rollers 202 are symmetrically arranged about the vertical center of the tube groove 2011. It should be noted that the outer periphery of the rollers 202 should be higher than the surface of the tube groove 2011 so that the outer periphery of the ductile iron water supply pipe 100 can fall on the rollers 202.

[0037] Specifically, the two ends of the rotating roller 202 are mounted on the side wall of the roller groove 2012 via bearings 203, so that the rotating roller 202 can rotate freely within the roller groove 2012.

[0038] Furthermore, one of the support rollers 200 is provided with a rotation drive device to drive one of the rotating rollers 202 on the support roller 200 to rotate.

[0039] Specifically, the rotation drive device includes a rotation motor 204, which is fixedly mounted on a rotation motor support 207. The rotation motor support 207 is fixedly mounted on the ground 1200. A rotation drive gear 205 is fixedly mounted on the output shaft of the rotation motor 204. A rotation driven gear 206 that meshes with the rotation drive gear 205 is fixedly connected to the end of one of the rollers 202 of the support roller 200. When the rotation motor 204 is working, the rotation drive gear 205 and the rotation driven gear 206 mesh to drive the roller 202 to rotate, thereby driving the ductile iron water supply pipe 100 to rotate, so that the inner wall of the water supply pipe can be heated more evenly by the heating device 700.

[0040] It should be noted that although two support rollers 200 are provided in this embodiment, their number can obviously be increased as needed. Moreover, the shape and structure of the support rollers 200 are not limited to those shown in the attached drawings. Other styles in the prior art can be adopted, as long as the rotating rollers 202 can be installed and the ductile iron water supply pipe 100 can be rotated.

[0041] In this embodiment, the heating device 700 is an electric heating wire, specifically a ring-shaped hollow structure formed by spiraling the electric heating wire. This structure can better adapt to the shape of the inner wall of the water supply pipe, so that the heat can be more evenly distributed to the inner wall coating. The electric heating wire is connected to an external power source through a wire to provide the electrical energy required for heating.

[0042] As a priority rather than a limitation, the heating device 700 is also equipped with a temperature sensor located near the inner wall of the ductile iron water supply pipe 100. This sensor can monitor the temperature of the inner wall coating in real time, facilitating precise control of the heating temperature and ensuring the quality of heat treatment.

[0043] In an alternative implementation, the heating device 700 can also be an induction heating coil. The advantages of an induction heating coil are higher heating efficiency and lower energy consumption, while the advantages of an electric heating wire are simple structure and low cost. Therefore, it can be flexibly selected according to the needs of the enterprise.

[0044] like Figure 1 and Figure 4 As shown, in this embodiment, the heating device 700 is fixed to the end of the long rod 600. The long rod 600 is mounted on the slider 400 via the bracket 500. A guide rail 300 that cooperates with the slider 400 is fixedly installed on the ground 1200. The slider 400 can move horizontally on the guide rail 300, thereby driving the heating device 700 to move horizontally. This allows the heating device 700 to be inserted into the ductile iron water supply pipe 100 from both ends and to move and heat simultaneously during the heat treatment of the coating on the inner wall of the ductile iron water supply pipe 100. This design also facilitates the heat treatment of ductile iron water supply pipes 100 of different lengths.

[0045] Furthermore, the slider 400 is provided with a walking drive device for driving the slider 400 to move on the guide rail 300.

[0046] Specifically, the walking drive device includes a walking motor 800, a walking gear 900, and a rack 1100. The walking motor 800 is fixedly mounted on the slider 400, the walking gear 900 is fixedly connected to the output shaft of the walking motor 800, and the rack 1100, which meshes with the walking gear 900, is fixedly installed on the ground 1200. When the walking motor 800 is working, it drives the walking gear 900 to rotate, and the walking gear 900 meshes with the rack 1100, thereby causing the slider 400 to move on the guide rail 300.

[0047] In this embodiment, when heat treatment is required on the inner wall coating of the ductile iron water supply pipe 100, the water supply pipe is first placed on the rotating rollers 202 of the two support rollers 200, so that both ends of the water supply pipe are respectively located in the pipe grooves 2011 of the two support rollers 200; then, the walking drive device is started, the walking motor 800 drives the walking gear 900 to rotate, the walking gear 900 meshes with the rack 1100, so that the slider 400 moves on the guide rail 300, driving the heating device 700 to move horizontally, and inserting the heating device 700 into the water supply pipe. Inside, the rotation drive device is activated simultaneously. The rotation motor 204 drives the rotation drive gear 205 to rotate. The rotation drive gear 205 meshes with the rotation passive gear 206, causing the roller 202 to rotate, which in turn drives the water supply pipe to rotate. At this time, the power supply of the electric heating wire is turned on, and the electric heating wire begins to heat up, heating the coating on the inner wall of the water supply pipe. During the heating process, the walking drive device drives the heating device 700 to move and change the heating area continuously. During the heating process, the heating device 700 can be moved horizontally back and forth to ensure uniform heating along the entire axis.

[0048] As mentioned earlier, a temperature sensor can monitor the temperature of the inner wall coating in real time and feed the temperature signal back to the control system. The control system adjusts the power of the electric heating wire according to the preset temperature parameters to control the heating temperature.

[0049] Of course, in some cases, the heating device 700 can also remain stationary during the heating process. This is applicable to situations where the coating on the inner wall of the ductile iron water supply pipe 100 is subjected to local heat treatment, such as heat treatment of a local repair coating.

[0050] Once the coating on the inner wall of the water supply pipe meets the heat treatment requirements, turn off the power to the electric heating wire to stop heating, and then pull the heating device 700 out of the water supply pipe.

[0051] The heat treatment device for the inner wall coating of the ductile iron water supply pipe achieves direct surface heating by inserting the heating device 700 into the ductile iron water supply pipe 100. This avoids the heat loss problem caused by the gradual transfer of heat from the outside of the pipe to the inside in the overall heating method, and can more accurately control the heating temperature of the inner wall coating to ensure coating quality. The two heating devices 700 can be moved horizontally at both ends of the ductile iron water supply pipe 100, and can heat the inner wall of the water supply pipe at the same time. This avoids the need for excessively long rods and improves the efficiency of heat treatment.

[0052] Compared to overall heating, surface heating can bring the inner wall coating to the required temperature more quickly, shortening heat treatment time and improving production efficiency. It also reduces heat loss because the heat acts directly on the inner wall coating, minimizing heat loss during transfer, thus improving energy utilization efficiency, reducing energy consumption, and primarily increasing operational efficiency.

[0053] This heat treatment device for coating the inner wall of ductile iron water supply pipes does not require a large heating furnace, has a small footprint, and low equipment investment costs. Its relatively simple structure and easy operation reduce labor costs and operational difficulties.

[0054] The heat treatment device for the inner wall coating of ductile iron water supply pipe can promote the bonding between the coating and the substrate through reasonable heat treatment. The device helps to improve the bonding strength between the coating and the substrate of ductile iron water supply pipe through precise heating and uniform heating, ensuring the long-term safe operation of the water supply system, improving the density and stability of the coating, and extending the service life of the water supply pipe. The heating parameters can be flexibly controlled according to different coating heat treatment needs.

[0055] It should be noted that the term "heat treatment" in this utility model should be interpreted broadly. In addition to heat treatment used to improve the structure / performance of the coating, it should also include heat treatment for simple purposes such as drying.

[0056] This heat treatment device for the inner wall coating of ductile iron water supply pipes achieves precise and efficient heating of the coating through reasonable design and structural arrangement. It offers advantages such as precise heating, improved heat treatment efficiency, reduced production costs, and guaranteed coating quality. It effectively solves problems such as high energy consumption, low efficiency, and uneven heating inherent in traditional integral heating methods. Furthermore, the device's rotation function and moving mechanism design further enhance the heating effect and versatility. In practical applications, this device can meet the requirements of modern industrial production for various heat treatments of the inner wall coating of ductile iron water supply pipes, providing strong support for the long-term safe operation of water supply systems.

[0057] 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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat treatment device for coating the inner wall of a ductile iron water supply pipe, characterized in that, The device includes a support roller (200) and two heating devices (700). At least two support rollers (200) are provided and are arranged parallel to each other on the ground (1200). Each support roller (200) includes a roller frame (201) and at least two rotating rollers (202) for supporting the ductile iron water supply pipe. One of the support rollers (200) is provided with a rotation drive device to drive one of the rotating rollers (202) on the support roller (200) to rotate. The ductile iron water supply pipe (100) is placed on the rotating roller (202) of the support roller (200). The two heating devices (700) are respectively arranged at both ends of the ductile iron water supply pipe (100) and can be inserted into the ductile iron water supply pipe (100) from both ends. The heating devices (700) can move and heat the inner wall coating of the ductile iron water supply pipe (100) during heat treatment.

2. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 1, characterized in that, A pipe groove (2011) is provided at the top of the roller frame (201) to fit the outer shape of the ductile iron water supply pipe (100) with clearance. The cross-section of the pipe groove (2011) is semi-circular. All the pipe grooves (2011) of the support rollers (200) are concentric. A roller groove (2012) is provided in the middle of the pipe groove (2011) of each support roller (200). The rotating roller (202) is installed in the roller groove (2012).

3. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 2, characterized in that, Each support roller (200) has two rotating rollers (202) arranged symmetrically about the vertical center face of the trough (2011), and the two ends of the rotating rollers (202) are mounted on the side wall of the roller trough (2012) by bearings (203).

4. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 1, characterized in that, The rotation drive device includes a rotation motor (204), which is fixedly placed on the ground (1200). The rotation drive gear (205) is fixedly installed on the output shaft of the rotation motor (204). A rotation driven gear (206) that meshes with the rotation drive gear (205) is fixedly connected to the end of one of the rollers (202) of the support roller (200).

5. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 4, characterized in that, The rotating motor (204) is fixedly installed on the rotating motor support (207), and the rotating motor support (207) is fixedly installed on the ground (1200).

6. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 1, characterized in that, The heating device (700) is fixed to the end of the long rod (600), the long rod (600) is fixedly installed on the slider (400), and a guide rail (300) that cooperates with the slider (400) is fixedly installed on the ground (1200).

7. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 6, characterized in that, The long rod (600) is mounted on the slider (400) via a bracket (500).

8. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 6, characterized in that, The slider (400) is equipped with a walking drive device.

9. A heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 8, characterized in that, The walking drive device includes a walking motor (800), a walking gear (900), and a rack (1100). The walking motor (800) is fixedly mounted on the slider (400), the walking gear (900) is fixedly connected to the output shaft of the walking motor (800), and a rack (1100) that meshes with the walking gear (900) is fixedly installed on the ground (1200).

10. The heat treatment device for coating the inner wall of a ductile iron water supply pipe according to claim 1, characterized in that, The heating device (700) is an electric heating wire or an induction heating coil.

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