Pipe induction hardening apparatus

Abstract

The utility model relates to metal quenching equipment technical field discloses a kind of round pipe induction quenching equipment, including the feeding device of sequentially arranged along round pipe conveying direction, first conveying mechanism, quenching device, cooling device and second conveying mechanism;The first conveying mechanism and second conveying mechanism structure are same;The first conveying mechanism includes base and two support frames, and two support frames are oppositely arranged on the two sides of base upper end surface;First arc plate and second arc plate are rotatably mounted on the support frame respectively, and first arc plate and second arc plate are oppositely arranged left and right, when using the device, it can be automatically adjusted the spacing of rotating lever by the cooperation of the hydraulic rod, adjusting plate triangular structure and first arc plate and second arc plate, adapt to different diameter round pipe.Spring telescopic rod provides stable clamping force, and limiting sleeve guarantees accurate adjustment, without frequent manual debugging, improve equipment versatility.

Description

Technical Field

[0001] This utility model relates to the technical field of metal quenching equipment, specifically to a circular tube induction quenching equipment. Background Technology

[0002] The round tube induction hardening equipment is a professional equipment used for round tube processing. Its working principle is roughly as follows: the round tube is taken out from the feeding structure, transported by the conveying structure, and then passed through the induction heating device for quenching heating and the cooling device for cooling. Finally, the processed round tube is sent out by the output structure, thereby realizing the quenching process of the round tube, which improves the surface hardness and other properties of the round tube.

[0003] However, in terms of rotating rod spacing adjustment, most equipment has a fixed rotating rod spacing that cannot be adjusted, and can only adapt to a single specification of round tube. To process round tubes of different diameters, the entire conveying structure needs to be replaced, which not only results in high equipment investment costs but also a time-consuming and labor-intensive replacement process, severely restricting production flexibility. The few adjustable devices mostly rely on manual operation, resulting in poor adjustment accuracy. Incorrect spacing often leads to unstable clamping of the round tube, affecting processing quality. The equipment has extremely poor versatility and cannot flexibly meet the processing needs of various specifications of round tubes. Furthermore, in terms of conveying and continuous processing, the existing equipment's rotation and conveying structure design has flaws. Either the round tube cannot rotate stably, resulting in uneven heating and cooling; or the conveying structure is prone to jamming and misalignment, failing to form a continuous and stable support surface. At the same time, the connections between various processing stages are not smooth, making it difficult to form a complete production line. Frequent shutdowns for adjustments are required, severely impacting processing efficiency and making it unsuitable for mass production.

[0004] To address the aforementioned problems, this application proposes an induction hardening device for round tubes. Utility Model Content

[0005] The purpose of this utility model is to provide a circular tube induction hardening device to solve the problems of difficult adjustment of the rotating rod spacing, low versatility, unstable conveying, and low efficiency in the prior art mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a circular tube induction hardening device, comprising a feeding device, a first conveying mechanism, a hardening device, a cooling device, and a second conveying mechanism arranged sequentially along the conveying direction of the circular tube; the first conveying mechanism and the second conveying mechanism have the same structure; the first conveying mechanism includes a base and two support frames, the two support frames being arranged opposite each other on both sides of the upper end face of the base; a first arc-shaped plate and a second arc-shaped plate are rotatably mounted on the support frames respectively, the first arc-shaped plate and the second arc-shaped plate being arranged opposite each other left and right, and an adjusting plate that can move up and down is mounted on the support frames; a first rotating rod is rotatably mounted on the top of the first arc-shaped plate, a second rotating rod is rotatably mounted on the top of the second arc-shaped plate, and a third rotating rod is rotatably mounted on the top of the adjusting plate, the third rotating rod being located between the first rotating rod and the second rotating rod, and the third rotating rod being located below the first rotating rod and the second rotating rod.

[0007] Preferably, both the first arc-shaped plate and the second arc-shaped plate are semi-arc structures; the adjusting plate includes a triangular structure and a vertical plate disposed at the upper end of the triangular structure.

[0008] Preferably, the adjusting plates on the two support frames are fixedly connected by a steel frame; a hydraulic rod is installed between the bottom of the steel frame and the upper end of the base.

[0009] Preferably, pulleys are installed at the bottom of both the first and second arc-shaped plates, and spring telescopic rods are connected to both the first and second arc-shaped plates; the spring telescopic rods are connected to the support frame and are inclined upwards; the pulleys are in contact with the side of the triangular structure of the adjusting plate.

[0010] Preferably, a limiting sleeve is fixedly installed at the front end of the support frame; the limiting sleeve is sleeved on the outside of the vertical plate of the adjustment plate.

[0011] Preferably, the ends of the first rotating rod, the second rotating rod, and the third rotating rod are all connected to a drive motor, and the outer walls of the first rotating rod, the second rotating rod, and the third rotating rod are all fitted with multiple rotating columns;

[0012] A conveying rod is provided laterally at the interval between two adjacent rotating columns on the third rotating rod; the conveying rod is rotatably installed on the upper end of the L-shaped bracket, and the lower end of the L-shaped bracket is fixedly connected to the steel frame.

[0013] Preferably, the upper end of the conveying rod is flush with the upper end of the rotating column on the third rotating rod; each of the conveying rods is connected to the track, and the track is connected to a motor for driving the track to rotate.

[0014] Preferably, the quenching device has a built-in induction heating coil; the cooling device is an annular structure sleeved on the outside of the circular tube, and multiple sets of nozzles are distributed circumferentially on the inner side of the cooling device; a water supply pipe is connected to the outside of the cooling device.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention utilizes a hydraulic rod, an adjusting plate triangular structure, and the cooperation of a first and second arc-shaped plate to automatically adjust the distance between rotating rods, adapting to circular pipes of different diameters. A spring-loaded telescopic rod provides stable clamping force, and a limiting sleeve ensures precise adjustment, eliminating the need for frequent manual adjustments and improving the equipment's versatility.

[0017] This invention utilizes a rotating column to drive the circular tube to rotate, ensuring uniform heating and cooling. The conveyor rod is simultaneously pushed axially by a track. Both form a continuous support surface, preventing jamming or misalignment. The L-shaped bracket moves in conjunction with the steel frame, ensuring conveying stability. A complete production line is formed from the unloading device to the second conveying mechanism, with smooth connections between each stage, significantly improving processing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a circular tube induction hardening device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the first conveying mechanism and quenching device in a circular tube induction hardening equipment according to the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the first conveying mechanism in a circular tube induction hardening device of this utility model;

[0021] Figure 4 This is a schematic diagram showing the connection relationship of the adjusting plate in a circular tube induction hardening device according to this utility model;

[0022] Figure 5 This is a top view of the first conveying mechanism in a circular tube induction hardening device according to the present invention;

[0023] In the diagram: 1. Feeding device; 2. First conveying mechanism; 3. Quenching device; 4. Cooling device; 5. Second conveying mechanism; 6. Base; 7. Support frame; 8. First arc plate; 9. Second arc plate; 10. Adjusting plate; 11. First rotating rod; 12. Second rotating rod; 13. Third rotating rod; 14. Steel frame; 15. Hydraulic rod; 16. Pulley; 17. Spring telescopic rod; 18. Limiting sleeve; 19. Rotating column; 20. Conveying rod; 21. L-shaped bracket; 22. Track; 23. Water pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-5 This utility model provides a technical solution: a circular tube induction quenching device, including a feeding device 1, a first conveying mechanism 2, a quenching device 3, a cooling device 4, and a second conveying mechanism 5 arranged sequentially along the conveying direction of the circular tube; the first conveying mechanism 2 and the second conveying mechanism 5 have the same structure; the first conveying mechanism 2 includes a base 6 and two support frames 7, which are arranged opposite to each other on both sides of the upper end face of the base 6; a first arc plate 8 and a second arc plate 9 are rotatably mounted on the support frames 7, which are arranged opposite to each other left and right; an adjusting plate 10 that can move up and down is mounted on the support frames 7; a first rotating rod 11 is rotatably mounted on the top of the first arc plate 8, a second rotating rod 12 is rotatably mounted on the top of the second arc plate 9, and a third rotating rod 13 is rotatably mounted on the top of the adjusting plate 10, which is located between the first rotating rod 11 and the second rotating rod 12, and is located below the first rotating rod 11 and the second rotating rod 12. The feeding device 1 is used to store the round tubes to be processed and transport them to the first conveying mechanism 2. The first conveying mechanism 2 and the second conveying mechanism 5 have the same structure and are arranged opposite each other along the axial direction of the round tube to ensure that the round tube is axially aligned during the conveying, quenching, and cooling processes. The base 6 of the first conveying mechanism 2 provides overall support, and two support frames 7 are fixed on both sides of the base 6 to form a symmetrical conveying support structure. The first arc-shaped plate 8 and the second arc-shaped plate 9, which are rotatably mounted on both sides of the front end of the support frame 7, and the adjusting plate 10, which can move up and down in the middle, contact the round tube through the first rotating rod 11, the second rotating rod 12, and the third rotating rod 13, which are rotatable at the top, respectively. When the round tube enters, the three sets of rotating rods clamp and transport the round tube by rotating. The round tube passes through the quenching device 3 for induction heating and the cooling device 4 for cooling and quenching along the axial direction, and is finally output by the second conveying mechanism 5, completing the entire quenching process.

[0026] Both the first arc-shaped plate 8 and the second arc-shaped plate 9 are semi-arc structures; the adjusting plate 10 includes a triangular structure and a vertical plate located at the top of the triangular structure. The first arc-shaped plate 8 and the second arc-shaped plate 9 are semi-arc structures and are arranged opposite each other. Their arc contours are adapted to the curvature of the outer wall of the circular tube. They can adjust their angles by rotating themselves, so that the first rotating rod 11 and the second rotating rod 12 at the top are always in contact with the outer wall of circular tubes of different diameters, ensuring clamping stability. The bottom of the adjusting plate 10 is a triangular structure, and the top is a vertical plate: the triangular structure facilitates the transmission of force through the inclined plane to subsequently push the arc-shaped plate to move, while the vertical plate serves as the main body for the up-and-down movement of the adjusting plate 10, ensuring the stability of the movement direction.

[0027] The adjusting plates 10 on the two support frames 7 are fixedly connected by a steel frame 14; a hydraulic rod 15 is installed between the bottom of the steel frame 14 and the upper end of the base 6. The adjusting plates 10 on the two support frames 7 are fixedly connected by the steel frame 14, so that the adjusting plates 10 on both sides can be raised and lowered synchronously, avoiding deviation of the circular tube conveying due to unilateral adjustment. The hydraulic rod 15 between the bottom of the steel frame 14 and the upper end of the base 6 provides power for the raising and lowering of the adjusting plates 10: when the hydraulic rod 15 extends or retracts, it drives the two adjusting plates 10 to move up and down synchronously through the steel frame 14, realizing the adjustment of the distance between the rotating rods to accommodate circular tubes of different diameters.

[0028] Both the first arc-shaped plate 8 and the second arc-shaped plate 9 are equipped with pulleys 16 at their bottoms, and both are connected to spring telescopic rods 17. The spring telescopic rods 17 are connected to the support frame 7 and are inclined upwards. The pulleys 16 are in contact with the sides of the triangular structure of the adjusting plate 10. The pulleys 16 at the bottom of the first arc-shaped plate 8 and the second arc-shaped plate 9 are in contact with the two sides of the triangular structure at the bottom of the adjusting plate 10. When the adjusting plate 10 moves up and down, the sides of the triangular structure exert a pushing force on the arc-shaped plate through the pulleys 16, forcing the first arc-shaped plate 8 and the second arc-shaped plate 9 to open or close inward around their rotation axis with the support frame 7, thereby adjusting the distance between the first rotating rod 11 and the second rotating rod 12. One end of the spring telescopic rod 17 on both sides of the arc plate is fixed to the arc plate, and the other end is fixed to both sides of the support frame 7, and has an upward inclined structure: when the arc plate is pushed open, the spring telescopic rod 17 is stretched, generating a reset elastic force to ensure that the arc plate always applies a stable clamping force to the round tube; when the adjusting plate 10 descends and the thrust decreases, the spring telescopic rod 17 retracts, driving the arc plate to reset, so that the rotating rod fits the round tube.

[0029] A limiting sleeve 18 is fixedly installed at the front end of the support frame 7; the limiting sleeve 18 is fitted onto the outer side of the vertical plate of the adjusting plate 10. The limiting sleeve 18 at the front end of the support frame 7 is fitted onto the outer side of the vertical plate at the upper end of the adjusting plate 10. Its function is to restrict the movement direction of the adjusting plate 10, ensuring that the adjusting plate 10 can only move up and down in the vertical direction, avoiding the left and right swaying of the adjusting plate 10 due to the thrust deviation of the hydraulic rod 15 or the reaction force of the arc plate, ensuring the stability of the adjustment process, and thus ensuring the accurate adjustment of the rod spacing.

[0030] In this embodiment, as Figure 2 and Figure 5 As shown, the ends of the first rotating rod 11, the second rotating rod 12 and the third rotating rod 13 are all connected to a drive motor, and the outer walls of the first rotating rod 11, the second rotating rod 12 and the third rotating rod 13 are all fitted with multiple rotating columns 19;

[0031] A conveying rod 20 is laterally arranged at the interval between two adjacent rotating columns 19 on the third rotating rod 13. The conveying rod 20 is rotatably mounted on the upper end of the L-shaped bracket 21, and the lower end of the L-shaped bracket 21 is fixedly connected to the steel frame 14. One end of the first rotating rod 11, the second rotating rod 12, and the third rotating rod 13 is connected to a drive motor, which provides power for the rotation of the rotating rod. The multiple sets of rotating columns 19, which are axially fixed on their outer walls, are in direct contact with the circular tube. The rotating columns 19 drive the circular tube to rotate only by their own rotation, ensuring that the circular tube can be evenly heated and cooled during the conveying process. The conveying rod 20 is laterally arranged at the interval between the rotating columns 19 of the third rotating rod 13. The conveying rod 20 is rotatably mounted on the upper end of the L-shaped bracket 21, and the lower end of the L-shaped bracket 21 is fixedly connected to the steel frame 14. The L-shaped bracket 21 moves synchronously with the steel frame 14, ensuring that the conveying rod 20 always maintains a suitable contact state with the circular tube, so that the conveying rod 20 can smoothly push the circular tube to move axially, realizing the conveying function of the circular tube.

[0032] The upper end of the conveyor rod 20 is flush with the upper end of the rotating column 19 on the third rotating rod 13. Each conveyor rod 20 is connected to the track 22, which is connected to a motor for driving its rotation. There is a gap between the lower end of the conveyor rod 20 and the upper end of the third rotating rod 13 to prevent interference during rotation. The upper end of the conveyor rod 20 is flush with the upper end of the adjacent rotating column 19, ensuring that the conveyor rod 20 and the rotating column 19 form a continuous support surface, jointly contacting the circular tube and ensuring smooth tube transport. The outer ends of each conveyor rod 20 are connected via the track 22, enabling all conveyor rods 20 to rotate synchronously, preventing tube misalignment due to inconsistent rotation speeds of individual conveyor rods 20, and further ensuring the stability of axial tube transport. The track 22 can be driven by a motor.

[0033] The quenching device 3 has a built-in induction heating coil; the cooling device 4 is an annular structure fitted over the outside of the circular tube, with multiple sets of nozzles distributed circumferentially on its inner side; a water supply pipe 23 is connected to the outside of the cooling device 4. The induction heating coil inside the quenching device 3 heats the passing circular tube using the principle of electromagnetic induction, bringing the surface of the tube to the quenching temperature, preparing it for subsequent quenching treatment. The annular structure of the cooling device 4, with multiple sets of nozzles distributed circumferentially on its inner side, provides 360° uniform spray cooling to the heated tube, rapidly reducing the surface temperature and completing the quenching hardening process. The water supply pipe 23 connected to the outside of the cooling device 4 continuously supplies cooling water to the nozzles, ensuring the continuity of the cooling process.

[0034] Working principle:

[0035] The circular tubes on the feeding device 1 are sequentially conveyed to the upper end of the first conveying mechanism 2 via the conveying structure (e.g., a conveyor belt) on the feeding device 1. After entering the first conveying mechanism 2, the circular tubes contact the rotating columns 19 on the outer walls of the first rotating rod 11, the second rotating rod 12, and the third rotating rod 13, respectively. At this time, the drive motors connected to the first rotating rod 11, the second rotating rod 12, and the third rotating rod 13 are started, driving the rotating columns 19 on the three rotating rods to rotate. The rotating columns 19 drive the circular tubes to rotate through friction with the circular tubes, ensuring uniform heating and cooling of the circular tubes. Simultaneously, the conveying rods 20, which are set at the intervals between adjacent rotating columns 19 on the third rotating rod 13, begin to work. The outer ends of each conveying rod 20 can be connected by a track 22 or a chain to achieve synchronous rotation. The conveying rods 20 contact the circular tubes and generate thrust, pushing the circular tubes to move axially. The conveying rod 20 is rotatably mounted on the upper end of the L-shaped bracket 21. The lower end of the L-shaped bracket 21 is fixedly connected to the steel frame 14 and can move synchronously with the steel frame 14 to ensure that the conveying rod 20 always maintains a suitable contact state with the round tube. The upper end of the conveying rod 20 is flush with the upper end of the rotating column 19 on the third rotating rod 13. That is, the conveying rod 20 and the rotating column 19 on the third rotating rod 13 contact the round tube at the same time, forming a continuous support surface for the round tube and ensuring that the round tube is conveyed smoothly.

[0036] When the type and diameter of the conveyed round pipe change, the hydraulic rod 15 between the bottom of the steel frame 14 and the base 6 extends and retracts, causing the adjusting plates 10 on the steel frame 14 and the two support frames 7 to rise and fall synchronously. The triangular structure at the bottom of the adjusting plate 10 contacts the pulleys 16 at the bottom of the first arc plate 8 and the second arc plate 9, pushing the two arc plates to rotate around the rotating shaft installed on the support frame 7. This causes the two arc plates to open to the sides or close inward, thereby adjusting the distance between the first rotating rod 11 and the second rotating rod 12 to accommodate round pipes of different diameters. The spring telescopic rods 17 on both sides of the arc plates have an upward inclined structure. One end of the spring telescopic rod 17 is fixed to the arc plate, and the other end is fixed to the support frame 7. It provides a restoring force when the arc plates move, ensuring the stability of the rotating column 19 in clamping the round pipe.

[0037] In addition, the limiting sleeve 18 at the front end of the support frame 7 is fitted on the outside of the vertical plate at the upper end of the adjusting plate 10, restricting the adjusting plate 10 to move only in the vertical direction, thus ensuring the accuracy of adjustment. When the steel frame 14 drives the adjusting plate 10 to move in the vertical direction, the vertical plate of the adjusting plate 10 drives the third rotating rod 13 to move up and down, thereby adapting to the diameter of the round tube.

[0038] The circular tube, conveyed axially by the first conveying mechanism 2, enters the quenching device 3. The induction heating coil inside the quenching device 3 heats the tube using electromagnetic induction, bringing its surface to the quenching temperature. The heated tube continues forward into the cooling device 4, a ring-shaped structure fitted around the outside of the tube. Multiple nozzles distributed circumferentially inside the cooling device 4 provide 360° uniform spray cooling, rapidly reducing the surface temperature and completing the quenching and hardening process. A water supply pipe 23 connected to the outside of the cooling device 4 continuously supplies cooling water to the nozzles, ensuring continuous cooling. After quenching and cooling, the tube is conveyed to the second conveying mechanism 5. The second conveying mechanism 5 has the same structure as the first conveying mechanism 2 and is positioned axially opposite to it. The second conveying mechanism 5 continues to stably convey the tube, finally outputting the processed tube, thus completing the entire induction quenching process.

[0039] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A circular tube induction hardening device, characterized in that: The system includes a feeding device (1), a first conveying mechanism (2), a quenching device (3), a cooling device (4), and a second conveying mechanism (5) arranged sequentially along the conveying direction of the circular tube; the first conveying mechanism (2) and the second conveying mechanism (5) have the same structure; the first conveying mechanism (2) includes a base (6) and two support frames (7), which are arranged opposite to each other on both sides of the upper surface of the base (6); a first arc plate (8) and a second arc plate (9) are rotatably mounted on the support frames (7), and the first arc plate (8) and the second arc plate (9) are respectively mounted on the support frames (7). The two curved plates (9) are arranged opposite each other on the left and right sides. An adjustable plate (10) that can move up and down is installed on the support frame (7). A first rotating rod (11) is rotatably installed on the top of the first curved plate (8), a second rotating rod (12) is rotatably installed on the top of the second curved plate (9), and a third rotating rod (13) is rotatably installed on the top of the adjustable plate (10). The third rotating rod (13) is located between the first rotating rod (11) and the second rotating rod (12), and the third rotating rod (13) is located below the first rotating rod (11) and the second rotating rod (12).

2. The induction hardening equipment for round tubes according to claim 1, characterized in that: The first arc plate (8) and the second arc plate (9) are both semi-arc structures; the adjustment plate (10) includes a triangular structure and a vertical plate located at the upper end of the triangular structure.

3. The induction hardening equipment for round tubes according to claim 1, characterized in that: The adjusting plates (10) on the two support frames (7) are fixedly connected by a steel frame (14); a hydraulic rod (15) is installed between the bottom of the steel frame (14) and the upper end of the base (6).

4. The induction hardening equipment for round tubes according to claim 1, characterized in that: Both the first arc plate (8) and the second arc plate (9) are equipped with pulleys (16) at their bottoms, and both the first arc plate (8) and the second arc plate (9) are connected to spring telescopic rods (17); the spring telescopic rods (17) are connected to the support frame (7), and the spring telescopic rods (17) are inclined upwards; the pulleys (16) are in contact with the side of the triangular structure of the adjusting plate (10).

5. The induction hardening equipment for round tubes according to claim 1, characterized in that: The support frame (7) is fixedly installed with a limiting sleeve (18) at its front end; the limiting sleeve (18) is sleeved on the outside of the vertical plate of the adjusting plate (10).

6. The induction hardening equipment for round tubes according to claim 1, characterized in that: The ends of the first rotating rod (11), the second rotating rod (12) and the third rotating rod (13) are all connected to a drive motor, and the outer walls of the first rotating rod (11), the second rotating rod (12) and the third rotating rod (13) are all fitted with multiple rotating columns (19); A conveying rod (20) is provided horizontally at the interval between two adjacent rotating columns (19) on the third rotating rod (13); the conveying rod (20) is rotatably installed on the upper end of the L-shaped bracket (21), and the lower end of the L-shaped bracket (21) is fixedly connected to the steel frame (14).

7. The induction hardening equipment for round tubes according to claim 6, characterized in that: The upper end of the conveying rod (20) is flush with the upper end of the rotating column (19) on the third rotating rod (13); each of the conveying rods (20) is connected to the track (22), and the track (22) is connected to a motor for driving the track to rotate.

8. The induction hardening equipment for round tubes according to claim 1, characterized in that: The quenching device (3) has a built-in induction heating coil; the cooling device (4) is an annular structure sleeved on the outside of the round tube, and multiple sets of nozzles are distributed circumferentially on the inner side of the cooling device (4); the outside of the cooling device (4) is connected to a water supply pipe (23).

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