Stainless steel annealing apparatus

Abstract

The stainless steel annealing equipment relates to the technical field of annealing of special products. The existing annealing equipment cannot realize the continuous feeding of the stainless steel pipe, resulting in low processing efficiency. The feeding support mechanism supports and moves the stainless steel pipe into the induction heating coil, the discharging support mechanism supports the stainless steel pipe, the feeding support mechanism retreats and supports the next stainless steel pipe to be annealed, the supporting rotating mechanism drives the stainless steel pipe to rotate, the induction heating coil heats the end of the stainless steel pipe to remove the residual stress of the end of the stainless steel pipe; the discharging support mechanism moves the stainless steel pipe to the discharging conveying mechanism to leave the induction heating position, so that the feeding support mechanism continues to support and move the next stainless steel pipe to the induction heating coil for annealing. Such alternating repetition can accelerate the feeding speed of the stainless steel pipe and improve the processing efficiency. The present application is mainly used for the annealing treatment of the stainless steel pipe.

Description

Technical Field

[0001] This invention relates to the field of annealing technology for special products, specifically to annealing equipment for stainless steel pipe fittings. Background Technology

[0002] Stainless steel is a type of steel characterized by its rust resistance and corrosion resistance, with a chromium content of at least 10.5% and a carbon content of no more than 1.2%. Stainless steel is commonly classified according to its microstructure into: martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel, and precipitation-hardening stainless steel, among others. Further subdivisions include super austenitic, super martensitic, high-nitrogen austenitic, super ferritic, and super duplex stainless steel. Stainless steel materials are widely used in the manufacture of various equipment and products.

[0003] During the mechanical cutting of stainless steel pipes, the cutting tool applies enormous mechanical force and heat to the material, causing plastic deformation of the metal near the cutting area (the end of the stainless steel pipe). This localized deformation generates unbalanced internal stress (residual stress) within the material. This residual stress is unstable. During subsequent processing, handling, storage, and even use, when the material is subjected to external forces (even small ones) or changes in ambient temperature, the stress may redistribute to reach an equilibrium state, causing the workpiece to twist, bend, or warp. Therefore, annealing is necessary to eliminate localized stress, repair the microstructure, and optimize performance, ensuring the stability, safety, and durability of the pipe in subsequent processing and use.

[0004] While existing annealing equipment can anneal pipes of different diameters and lengths—for example, Chinese patent CN118880009A discloses "a heat treatment device for stainless steel pipes"—which uses two clamps to hold and support stainless steel pipes of different outer diameters and pulleys to rotate the pipes, thus achieving uniform heat treatment, this annealing equipment cannot continuously feed stainless steel pipes, resulting in low processing efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a stainless steel annealing equipment, which can realize continuous feeding and annealing of pipes, thereby improving processing efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solutions.

[0007] 1. Stainless steel annealing equipment, including a feeding support mechanism, a discharging support mechanism, an induction heating mechanism, a supporting rotation mechanism, and a discharging conveying mechanism. The feeding support mechanism and the discharging support mechanism are respectively arranged on both sides of the induction heating mechanism. The feeding support mechanism is used for supporting and feeding the stainless steel tubes; the induction heating mechanism is equipped with an induction heating coil to remove residual stress in the stainless steel tubes; the discharging support mechanism is used for supporting and discharging the stainless steel tubes; the supporting rotation mechanism is installed below the induction heating coil for rotating the stainless steel tubes; the discharging conveying mechanism is installed below the discharging support mechanism. The induction heating coil is used to remove the annealed stainless steel tube from the processing area. The feeding support mechanism supports and moves the stainless steel tube into the induction heating coil. The unloading support mechanism supports the stainless steel tube. The feeding support mechanism retracts and supports the next stainless steel tube to be annealed. The supporting rotation mechanism drives the stainless steel tube to rotate. The induction heating coil heats the end of the stainless steel tube to remove the residual stress at the end of the stainless steel tube. The unloading support mechanism moves the stainless steel tube to the unloading conveying mechanism to make way for the induction heating position, so that the feeding support mechanism can continue to support and move the next stainless steel tube to the induction heating coil for annealing.

[0008] A loading support mechanism and a unloading support mechanism are respectively set on both sides of the induction heating mechanism. The loading support mechanism realizes the loading of stainless steel tubes, and the unloading support mechanism realizes the unloading of stainless steel tubes. During the processing, the loading support mechanism moves the stainless steel tube to the induction heating mechanism, and then the unloading support mechanism supports the annealing. The loading support mechanism retracts and reloads. When the unloading support mechanism drives the stainless steel tube to give way to the induction heating position, the loading support mechanism can support and move the next stainless steel tube to the induction heating mechanism, and then the unloading support mechanism supports the annealing. This alternating and repeated process can speed up the loading speed of stainless steel tubes and improve processing efficiency.

[0009] 2. Based on technical solution 1, the feeding support mechanism includes a feeding electric cylinder, a feeding slider, a feeding support rod, and a feeding clamp. The feeding electric cylinder is driven and connected to the feeding slider. One end of the feeding support rod is rotatably mounted to the feeding slider, and the other end is connected to the feeding clamp. The feeding clamp is used to clamp and support the stainless steel tube. An air passage is opened along the axial direction inside the feeding clamp. Multiple slides communicating with the air passage are opened in the circumferential direction of the feeding clamp. A feeding clamp block is set in each slide. A reset cylinder is set at one end of the air passage. The reset cylinder is equipped with a reset piston rod. The reset piston rod can extend or retract to return to the positioning cylinder. A pressing block is also installed on the reset piston rod. The outer wall of the pressing block contacts and can press the feeding clamp block outward. When air is supplied into the air passage, the gas presses the reset piston rod to retract back into the positioning cylinder. The pressing block moves together with the reset piston rod. The pressing block simultaneously presses multiple feeding clamp blocks outward. These multiple feeding clamp blocks press against the inner wall of the stainless steel tube to achieve clamping.

[0010] 3. Based on technical solution 2, the material feeding support rod is made of ceramic or glass.

[0011] 4. Based on technical solution 3, a flexible self-locking mechanism is also provided between the feeding support rod and the feeding clamp. When the feeding clamp is inserted into the stainless steel pipe, the flexible self-locking mechanism unlocks, and the feeding clamp can move so that the feeding clamp is coaxial with the stainless steel pipe. After the feeding clamp holds the stainless steel pipe, the flexible self-locking mechanism locks, and the feeding support rod straightens the stainless steel pipe through the feeding clamp so that the stainless steel pipe is coaxial with the feeding support rod.

[0012] 5. Based on technical solution 4, the flexible self-locking mechanism includes a support spring, a locking pin, a sliding sleeve, and a locking sleeve. The locking sleeve is installed on the unloading clamp, and a first alignment surface is provided on the side of the locking sleeve facing the unloading support rod. The locking pin is cylindrical, with one end facing the locking sleeve, and this end has a second alignment surface that mates with the first alignment surface. The sliding sleeve is installed on the unloading support rod, and a circular slide is provided on the side of the sliding sleeve facing the unloading clamp. The other end of the locking pin is inserted into the circular slide and can move axially, forming a sealed cavity between the locking pin and the circular slide. An air inlet is provided in the air passage of the unloading clamp, and the air inlet communicates with the sealed cavity.

[0013] 6. Based on technical solution 5, the feeding support mechanism also includes a connecting conductor, a slip ring, and a brush. The slip ring is fitted on the feeding support rod and can rotate with the feeding support rod. The brush is installed on the feeding slider and contacts the slip ring. One end of the connecting conductor is connected to the slip ring, and the other end is connected to the support spring.

[0014] 7. Based on technical solution 3, the supporting rotation mechanism includes a rotary motor, rollers, roller brackets and lifting cylinders. The lifting cylinder is equipped with a lifting piston rod, which can extend or retract into the lifting cylinder. The roller bracket is installed at the end of the lifting piston rod, and the rollers are rotatably installed on the roller brackets. The rotary motor is connected to the roller drive.

[0015] 8. Based on technical solution 7, a guide rod, a buffer spring, and a support plate are also provided between the roller bracket and the lifting piston rod. The support plate is fixedly installed on the top of the lifting piston rod. One end of the guide rod is connected to the support plate, and the other end is slidably connected to the roller bracket. A buffer spring is sleeved on the guide rod.

[0016] 9. Based on technical solution 2, a braking mechanism is provided at the tail end of the feeding support mechanism. During the process of the stainless steel pipe exiting the induction heating coil, the braking mechanism is activated and the braking mechanism gradually stops the stainless steel pipe to prevent the stainless steel pipe from falling off when supported by the feeding conveyor mechanism.

[0017] 10. Based on technical solution 9, the braking mechanism includes a brake disc and a brake assembly. The brake disc is installed at the tail end of the unloading support rod. The brake assembly includes a brake seat, an electric cylinder, a valve plate, a one-way valve, a pressing plate, a brake block, a reset spring, and a return spring. The brake seat is installed on the unloading slider. The brake seat has an upper brake chamber and a lower brake chamber, which are connected. The electric cylinder is installed in the upper brake chamber and has an electric push rod. The valve plate, reset spring, and pressing plate are installed in the upper brake chamber in sequence. The pressing plate can slide along the axis of the upper brake chamber. The valve plate has an air outlet and an air inlet. The diameter of the air outlet is larger than the diameter of the air inlet. The one-way valve is installed at the air outlet. There are two lower brake chambers. Each lower brake chamber has a brake block and a return spring installed in it. The brake block can move along the axis of the lower brake chamber. One end of the return spring is connected to the brake block, and the other end is connected to the brake seat. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stainless steel annealing equipment of the present invention during the feeding stage.

[0019] Figure 2 This is a schematic diagram of the stainless steel annealing equipment of the present invention during the annealing stage.

[0020] Figure 3 This is a schematic diagram of the stainless steel annealing equipment (without the frame) of the present invention during the material feeding stage.

[0021] Figure 4 This is a schematic diagram of the material feeding support mechanism of the present invention.

[0022] Figure 5 This is a front view of the material feeding support mechanism of the present invention.

[0023] Figure 6 for Figure 5 Sectional view at point BB.

[0024] Figure 7 for Figure 3 A magnified view of a portion of point A in the middle.

[0025] Figure 8 This is a cross-sectional schematic diagram of the braking mechanism.

[0026] The attached figures are labeled as follows:

[0027] Frame 1, Support Platform 11;

[0028] 2. Material bin; 21. Discharge port; 22. Discharge baffle; 23. Discharge cylinder; 24. Discharge support plate; 25. Support cylinder; 26. V-shaped support plate;

[0029] 3. Feeding support mechanism; 31. Feeding electric cylinder; 32. Feeding slider; 33. Feeding support rod; 34. Feeding clamp;

[0030] Material feeding support mechanism 4, material feeding electric cylinder 41, material feeding slider 42, material feeding support rod 43, air pipe 431, material feeding chuck 44, material feeding clamp 441, first wedge surface 4411, air passage 442, air inlet 4421, reset cylinder 443, reset piston rod 4431, extrusion block 444, second wedge surface 4441;

[0031] 5. Induction heating mechanism; 51. Induction heating coil; 52. Heating power supply; 53. Slide rail;

[0032] Supporting rotating mechanism 6, rotating motor 61, driven wheel 62, synchronous belt 63, roller 64, roller bracket 65, lifting cylinder 66, guide rod 67, buffer spring 68, support plate 69;

[0033] Material feeding conveyor 7, circular conveyor belt 71, steel support 711, material unloading cylinder 72, material unloading piston rod 721, material unloading tray 722;

[0034] 8. Flexible self-locking mechanism, 81. Support spring, 82. Locking pin, 83. Sliding sleeve, 831. Circular slide, 84. Locking sleeve, 85. Connecting conductor, 86. Slip ring, 87. Brush;

[0035] Braking mechanism 9, brake disc 91, brake seat 92, upper brake chamber 921, lower brake chamber 922, brake cylinder 93, electric push rod 931, valve plate 94, air outlet 941, air inlet 942, one-way valve 95, squeeze plate 96, brake block 97, return spring 98, return spring 99. Detailed Implementation

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] See Figure 1 This embodiment of a stainless steel annealing equipment includes a frame 1, a hopper 2, a feeding support mechanism 3, a discharging support mechanism 4, an induction heating mechanism 5, a supporting rotation mechanism 6, and a discharging conveying mechanism 7. Figure 1 As shown, the frame 1 is equipped with a support platform 11, and the hopper 2 is installed on the support platform 11 for storing stainless steel tubes 10 to be annealed. A feeding support mechanism 3 and a discharging support mechanism 4 are respectively located on both sides of the induction heating mechanism 5 and installed on the support platform 11. The feeding support mechanism 3 faces the outlet of the hopper 2 and is used for supporting and feeding the stainless steel tubes 10. The induction heating mechanism 5 is used to remove residual stress from the stainless steel tubes 10. Combined with... Figure 1The supporting rotation mechanism 6 is installed below the induction heating mechanism 5 for rotating the stainless steel tube 10. The unloading support mechanism 4 is used to support and unload the annealed stainless steel tube 10. The unloading conveying mechanism 7 is installed below the unloading support mechanism 4 for removing the annealed stainless steel tube 10. The hopper 2 discharges material, the loading support mechanism 3 supports and moves the stainless steel tube 10 to the induction heating mechanism 5, the unloading support mechanism 4 supports the stainless steel tube 10, the loading support mechanism 3 retracts and supports the next stainless steel tube 10 to be annealed, simultaneously, the supporting rotation mechanism 6 drives the stainless steel tube 10 to rotate, and the induction heating mechanism 5 heats the end of the stainless steel tube 10 to remove residual stress at the end. After the first stainless steel tube 10 completes annealing, the unloading support mechanism 4 moves the stainless steel tube 10 above the unloading conveying mechanism 7, and the unloading conveying mechanism 7 supports and conveys the annealed stainless steel tube 10 away from the processing area. At this time, the annealing position of the induction heating mechanism 5 is vacated, the feeding support mechanism 3 supports the next stainless steel tube 10 to move to the induction heating mechanism 5, the unloading support mechanism 4 supports the stainless steel tube 10, the feeding support mechanism 3 then retracts and supports the next stainless steel tube 10, and so on, which can realize the continuous feeding of stainless steel tube 10 and improve the processing efficiency of stainless steel tube 10.

[0038] like Figure 2 As shown, in this embodiment, the hopper 2 is inclined on the support platform 11 so that the stainless steel pipes 10 inside the hopper 2 can be automatically fed by gravity. The hopper 2 has a discharge port 21 facing the feeding support mechanism 3, which is blocked by a discharge baffle 22 to prevent the stainless steel pipes 10 from automatically discharging from the discharge port 21. Combined with... Figure 3 and Figure 4 The inner side of the discharge baffle 22 is also provided with a discharge cylinder 23 and a discharge support plate 24 for discharging the stainless steel pipe 10. The discharge cylinder 23 is provided with a discharge piston rod (not shown in the figure), which can extend or retract from the discharge cylinder 23. The discharge support plate 24 is installed at the end of the discharge piston rod and is inclined towards the discharge baffle 22, so that the stainless steel pipe 10 on the discharge support plate 24 can abut against the discharge baffle 22. Figure 3As shown, a supporting cylinder 25 and a V-shaped support plate 26 are also provided on the outer side of the discharge baffle 22. The supporting cylinder 25 is equipped with a supporting piston rod (not shown in the figure), which can extend or retract from the supporting cylinder 25. The V-shaped support plate 26 is installed at the end of the supporting piston rod. When the hopper 2 discharges material, air is supplied to the supporting cylinder 25, the supporting piston rod extends out of the supporting cylinder 25 and supports the V-shaped support plate 26 to move upward until the end of the V-shaped support plate 26 rises to be flush with the top of the discharge baffle 22, and the supporting cylinder 25 stops supplying air. Air is supplied to the discharge cylinder 23, causing the discharge piston rod to extend out of the discharge cylinder 23. The discharge support plate 24 lifts the stainless steel tube 10. During this process, the stainless steel tube 10 moves upward along the inner wall of the discharge baffle 22. When the stainless steel tube 10 is lifted to a height higher than the discharge baffle 22, it slides over the discharge baffle 22 by gravity and onto the V-shaped support plate 26. The discharge piston rod retracts into the discharge cylinder 23. When the discharge support plate 24 resets, the next stainless steel tube 10 awaiting annealing rolls onto the discharge support plate 24 by gravity, ready for annealing. The support piston rod retracts into the support cylinder 25, and the V-shaped support plate 26 supports the stainless steel tube 10 as it moves downward to the loading position.

[0039] like Figure 3 As shown, the induction heating mechanism 5 of this embodiment includes induction heating coils 51, heating power supplies 52, and slide rails 53. Two induction heating coils 51 and two heating power supplies 52 are provided. Each heating power supply 52 is connected to and supplies power to one induction heating coil 51, causing the corresponding induction heating coil 51 to heat up. Each induction heating coil 51 corresponds to one end of the stainless steel tube 10, so that when the stainless steel tube 10 is inserted into the two induction heating coils 51, both ends of the stainless steel tube 10 can be annealed simultaneously. Furthermore, the two heating power supplies 52 are slidably connected to the slide rails 53. By adjusting the distance between the two induction heating coils 51, annealing of stainless steel tubes 10 of different lengths can be achieved.

[0040] like Figure 2As shown, the feeding support mechanism 3 in this embodiment includes a feeding electric cylinder 31, a feeding slider 32, a feeding support rod 33, and a feeding clamp 34. The feeding electric cylinder 31 is mounted on the support platform 11 and drivenly connected to the feeding slider 32. One end of the feeding support rod 33 is rotatably mounted to the feeding slider 32 via a bearing, and the other end is fixedly connected to the feeding clamp 34. The feeding clamp 34 is used to clamp and support the stainless steel tube 10. When the stainless steel tube 10 moves to the feeding position, the feeding electric cylinder 31 drives the feeding clamp 34 to move toward the stainless steel tube 10 via the feeding slider 32 and the feeding support rod 33. The feeding clamp 34 is inserted into the stainless steel tube 10 and moves to a position near the middle of the stainless steel tube 10. The feeding clamp 34 clamps the stainless steel tube 10 and is fixed to the stainless steel tube 10. The piston rod retracts to support cylinder 25, V-shaped support plate 26 moves down and separates from stainless steel tube 10, and feeding electric cylinder 31 continues to drive feeding chuck 34 to move. Feeding chuck 34 drives stainless steel tube 10 to induction heating mechanism 5 for annealing.

[0041] like Figure 3 As shown, the unloading support mechanism 4 in this embodiment includes an unloading electric cylinder 41, an unloading slider 42, an unloading support rod 43, and an unloading clamp 44. The unloading electric cylinder 41 is mounted on the support platform 11 and drivenly connected to the unloading slider 42. One end of the unloading support rod 43 is rotatably mounted on the unloading slider 42 via a bearing, and the other end is connected to the unloading clamp 44, which is used to clamp and support the stainless steel tube 10. When the loading support mechanism 3 moves the stainless steel tube 10 to the induction heating mechanism 5, the unloading electric cylinder 41 drives the unloading clamp 44 to move toward the stainless steel tube 10 via the unloading slider 42 and the unloading support rod 43. The unloading clamp 44 is inserted into the middle position inside the stainless steel tube 10, clamping and fixing the stainless steel tube 10. The loading clamp 34 is driven by the loading electric cylinder 31 to withdraw from the stainless steel tube 10, at which point the stainless steel tube 10 is completely supported by the unloading support mechanism 4.

[0042] Furthermore, the loading chuck 34 and unloading chuck 44 in this embodiment have the same structure. The structure of the loading chuck 34 and unloading chuck 44 will be described in detail using the unloading chuck 44 as an example. Figure 6 As shown, in this embodiment, an air passage 442 is opened along the axial direction inside the unloading clamp 44. Three slides communicating with the air passage 442 are opened in the circumferential direction of the unloading clamp 444. An unloading clamping block 441 is provided in each slide. A reset cylinder 443 is provided at one end of the air passage 442. The reset cylinder 443 is equipped with a reset piston rod 4431, which can extend or retract to return to the original position. A pressing block 444 is also installed on the reset piston rod 4431. The outer wall of the pressing block 444 contacts and can press the unloading clamping block 441 outward. Figure 6As shown, an air pipe 431 is installed inside the feeding support rod 43. The air outlet of the air pipe 431 is connected to the other end of the air passage 442. When air is supplied to the air passage 442 through the air pipe 431, the gas compresses the reset piston rod 4431 and retracts it into the return cylinder 443. The compression block 444 moves together with the reset piston rod 4431. The compression block 444 simultaneously compresses the three feeding clamps 441 outward, and the three feeding clamps 441 press against the inner wall of the stainless steel tube 10 to achieve clamping. This design not only achieves clamping and fixing of the feeding clamp 44 and the stainless steel tube 10, but also corrects the position of the stainless steel tube 10 by the compression of the three feeding clamps 441 when the feeding clamp 44 and the stainless steel tube 10 are not coaxial, so that the feeding clamp 44 and the stainless steel tube 10 can be coaxial. In this way, the stainless steel tube 10 and the feeding support mechanism 4 rotate coaxially, which can avoid the feeding support rod 43 from being broken or shattered due to rotational stress caused by misalignment. When the unloading chuck 44 needs to release the stainless steel tube 10, the air pipe 431 stops supplying air, and the gas stored in the reset cylinder 443 squeezes the reset piston rod 4431 and the extrusion block 444 to move outward. The extrusion block 444 no longer squeezes the unloading chuck 441, and the unloading chuck 441 retracts back into the unloading chuck 44 by gravity, and the unloading chuck 44 releases the stainless steel tube 10.

[0043] Furthermore, such as Figure 6 As shown, the end of the feeding clamping block 441 that contacts the extrusion block 444 is a concave conical surface, thus forming two first wedge surfaces 4411. The outer wall of the extrusion block 444 is conical, forming two second wedge surfaces 4441 that mate with the first wedge surfaces 4411 of the feeding clamping block 441. The extrusion block 444 is located within the conical surfaces of the three feeding clamping blocks 441. As the extrusion block 444 moves toward the reset cylinder 443, one of the second wedge surfaces 4441 on one side of the extrusion block 444 presses against the first wedge surface 4411 of the feeding clamping block 441, thereby achieving the outward movement of the feeding clamping block 441. The other first wedge surface 4411 of the feeding clamping block 441 limits the extrusion block 444, preventing the extrusion block 444 from detaching from the feeding clamping block 441.

[0044] In this embodiment, the loading support rod 33 and unloading support rod 43 are made of materials such as ceramics and glass that are not induction heated and can withstand high temperatures. This ensures that during the process of the loading support mechanism 3 and the unloading support mechanism 4 driving the stainless steel tube 10 into the two induction heating coils 51, the loading support rod 33 and the unloading support rod 43 will not be heated by the induction heating coils 51 and soften or bend, thus avoiding wasted electricity. It should be noted that since the loading support rod 33 and the unloading support rod 43 support the stainless steel tube 10, which has a certain weight, the support rods selected in this embodiment are made of ceramics or glass with high hardness to support the stainless steel tube 10.

[0045] like Figure 3 As shown, the supporting rotation mechanism 6 in this embodiment includes a rotary motor 61, a driving wheel (not shown in the figure), a driven wheel 62, a synchronous belt 63, a roller 64, a roller bracket 65, and a lifting cylinder 66. The rotary motor 61 is mounted on the support platform 11. The driving wheel is connected to the motor shaft of the rotary motor 61 and can rotate with the motor shaft. The lifting cylinder 66 is mounted below the support platform 11. An opening is opened on the support platform 11 at the position corresponding to the lifting cylinder 66. The lifting cylinder 66 is provided with a lifting piston rod, which can extend or retract. The roller bracket 65 is mounted on the end of the lifting piston rod. The roller 64 is rotatably mounted on the roller bracket 65. The driven wheel 62 is fixedly connected to one end of the roller 64. The synchronous belt 63 is sleeved on the driving wheel and the driven wheel 62 and tensioned. When the stainless steel tube 10 is supported by the feeding support mechanism 3, air is supplied to the lifting cylinder 66. The lifting piston rod extends out of the lifting cylinder 66 and drives the roller bracket 65 to move upward. When the roller 64 contacts the outer wall of the stainless steel tube 10, the lifting piston rod stops moving. When the stainless steel tube 10 is supported by the unloading support mechanism 4, the rotary motor 61 drives the drive wheel to rotate. The drive wheel drives the roller 64 to rotate through the synchronous belt 63 and the driven wheel 62. The roller 64 drives the stainless steel tube 10 to rotate around its own central axis, thereby achieving uniform heating at both ends of the stainless steel tube 10 and ensuring the annealing effect. At the same time, the unloading support mechanism 4 rotates together with the stainless steel tube 10 to avoid torque between the stainless steel tube 10 and the unloading support mechanism 4.

[0046] like Figure 3 As shown, in this embodiment, a guide rod 67, a buffer spring 68, and a support plate 69 are also provided between the roller bracket 65 and the lifting piston rod. The support plate 69 is fixedly installed at the top of the lifting piston rod. There are two guide rods 67, which are vertically installed on the support plate 69. Each guide rod 67 is fitted with a buffer spring 68. The roller bracket 65 is slidably connected to the guide rod 67. In this way, when the roundness of the stainless steel tube 10 is insufficient, the stainless steel tube 10 can press down on the roller bracket 65, so that the lateral force between the stainless steel tube 10 and the feeding support rod 43 is absorbed by the buffer spring 68, preventing the feeding support rod 43 from being subjected to a large lateral force and breaking or cracking.

[0047] like Figure 4 and Figure 6As shown, in this embodiment, the feeding clamp 44 and the feeding support rod 43 are set separately and connected by a flexible self-locking mechanism 8. During the process of the feeding support mechanism 4 being inserted into the stainless steel tube 10, the feeding clamp 44 can move. In this way, the lateral force on the feeding clamp 44 will not be directly transmitted to the feeding support rod 43, but will be absorbed by the flexible self-locking mechanism 8. Thus, even if the feeding support mechanism 3 and the feeding support mechanism 4 are not concentric or have an inclined angle, the force will not be transmitted to the feeding support rod 43 through the stainless steel tube 10 and the feeding clamp 44. Therefore, the feeding support rod 43 can be prevented from being broken by lateral force. Just as the unloading chuck 44 is about to clamp the stainless steel tube 10, the loading support mechanism 3 releases the stainless steel tube 10. At this time, the stainless steel tube 10 is temporarily supported by the supporting rotation mechanism 6. Then, the unloading support mechanism 4 locks the unloading chuck 44 and the unloading support rod 43 through the flexible self-locking mechanism 8, and adjusts the position of the stainless steel tube 10 through the unloading chuck 44 to make the stainless steel tube 10 and the unloading support rod 43 coaxial. This prevents the unloading support rod 43 from being subjected to lateral force and breaking during the synchronous rotation of the unloading support mechanism 4 and the stainless steel tube 10 due to their misalignment. Specifically, as follows... Figure 6 As shown, the flexible self-locking mechanism 8 in this embodiment is a cylindrical structure and is fitted onto the air tube 431. The flexible self-locking mechanism 8 includes a support spring 81, a locking pin 82, a sliding sleeve 83, and a locking sleeve 84. The locking sleeve 84 is fitted onto the air tube 431 and installed on the side of the unloading clamp 44 facing the unloading support rod 43. The side of the locking sleeve 84 facing the unloading support rod 43 has a first alignment surface. The locking pin 82 is cylindrical, with one end facing the locking sleeve 84, and this end has a second alignment surface that mates with the first alignment surface. Figure 6As shown, the sliding sleeve 83 is fitted over the air pipe 431 and installed on the unloading support rod 43. The sliding sleeve 83 has a circular slide 831 on the side facing the unloading clamp 44. The other end of the locking pin 82 is inserted into the circular slide 831 and can move axially. A sealed cavity is formed between the locking pin 82 and the circular slide 831. An air inlet 4421 is provided in the air passage 442 of the unloading clamp 44. The air inlet 4421 communicates with the sealed cavity through the locking air pipe (not shown in the figure). When the feed chuck 44 clamps the stainless steel tube 10, air continues to be injected into the air passage 442 through the air pipe 431. The gas enters the sealed cavity through the air inlet 4421 and the locking air pipe. The gas pushes the locking pin 82 to move towards the feed chuck 44. The locking pin 82 slowly inserts into the locking sleeve 84 and, through the cooperation of the first and second alignment surfaces, aligns the positions of the feed chuck 44 and the feed support rod 43, making the feed chuck 44 and the feed support rod 43 coaxial. Since the position of the feed support rod 43 remains unchanged, the position of the stainless steel tube 10 can be slowly adjusted by the feed chuck 44, making the stainless steel tube 10 coaxial with the feed support rod 43. When the locking pin 82 is fully inserted into the locking sleeve 84, the support spring 81 can no longer swing. At this time, the feed chuck 44 and the feed support rod 43 are locked, which can stably support the stainless steel tube 10. It should be noted that the air inlet 4421 in the unloading chuck 44 is closer to the air inlet of the air passage 442 than the reset piston rod 4431. Before the unloading chuck 44 clamps the stainless steel tube 10, the air inlet 4421 is blocked by the reset piston rod 4431. Only when the reset piston rod 4431 and the extrusion block 444 are squeezed into place by the gas, that is, when the unloading chuck 441 clamps the stainless steel tube 10, will the air inlet 4421 be exposed. At this time, the flexible self-locking mechanism 8 can realize the locking function, so as to achieve the purpose of clamping first and then locking.

[0048] Furthermore, such as Figure 4As shown, the flexible self-locking mechanism 8 in this embodiment also includes a connecting conductor 85, a slip ring 86, and a brush 87. The slip ring 86 is fitted onto the unloading support rod 43 and can rotate with the unloading support rod 43. The brush 87 is installed on the unloading slider 42 and contacts the slip ring 86. One end of the connecting conductor 85 is connected to the slip ring 86, and the other end is connected to the support spring 81. The connecting conductor 85 is made of a graphite-based flexible conductive material, which can achieve conductivity and also avoid being inductively heated. During the process of the unloading support mechanism 4 being inserted into the stainless steel tube 10, when the support spring 81 approaches the induction heating coil 51, the brush 87 is energized, and the current flowing through it is opposite in phase and equal in amplitude to the induced current in the induction heating coil 51. The current is transmitted to the support spring 81 through the slip ring 86 and the connecting conductor 85, thereby canceling the eddy current magnetic field generated by the induction heating coil 51. When the support spring 81 passes the induction heating coil 51, the brush 87 is de-energized to prevent the support spring 81 from being continuously heated. That is, the eddy current magnetic field is counteracted only when the support spring 81 is close to the induction heating coil 51. This can prevent the support spring 81 from aging faster, reducing its toughness, and causing brittle fracture due to long-term heat accumulation.

[0049] like Figure 3 As shown, the unloading conveying mechanism 7 in this embodiment includes an annular conveyor belt 71 and a retraction cylinder 72. Both the annular conveyor belt 71 and the retraction cylinder 72 are installed below the support platform 11. The annular conveyor belt 71 is provided with multiple sets of steel supports 711 along the conveying direction. The retraction cylinder 72 is provided with a retraction piston rod 721 and a retraction tray 722. The retraction piston rod 721 can extend or retract from the retraction cylinder 72. The retraction tray 722 is installed at the end of the retraction piston rod 721. When the unloading support mechanism 4 supports the stainless steel pipe 10 and moves it above the retraction tray 722, air is supplied to the retraction cylinder 72. The retraction piston rod 721 extends out of the retraction cylinder 72, the retraction tray 722 supports the stainless steel pipe 10, and the unloading support mechanism 4 releases the stainless steel pipe 10 and retracts. The ejector piston rod 721 retracts into the ejector cylinder 72, and the two ends of the stainless steel pipe 10 rest on the steel supports 711 on the two circular conveyor belts 71 and are transported out of the processing area by the circular conveyor belts 71.

[0050] like Figure 1 and Figure 2 As shown, in this embodiment, a braking mechanism 9 is provided at the tail end of the feeding support mechanism 4. During the process of the stainless steel tube 10 exiting the induction heating coil 51, the braking mechanism 9 is activated, and the braking mechanism 9 gradually stops the stainless steel tube 10. This prevents the stainless steel tube 10 from continuing to rotate due to inertia, which could cause the stainless steel tube 10 to rotate and roll off the feeding conveyor mechanism 7.

[0051] Specifically, such as Figure 7 and Figure 8As shown, the braking mechanism 9 in this embodiment includes a brake disc 91 and a brake assembly. The brake disc 91 is installed at the tail end of the unloading support rod 43. The brake assembly includes a brake seat 92, a brake cylinder 93, a valve plate 94, a one-way valve 95, a pressing plate 96, a brake block 97, a return spring 98, and a return spring 99. The brake seat 92 is installed on the unloading slider 42 and can move with the unloading slider 42. The brake seat 92 has an upper brake chamber 921 and a lower brake chamber 922, which are connected. The brake cylinder 93 is installed at the opening of the upper brake chamber 921 and seals the upper brake chamber 921. The brake cylinder 93 is equipped with an electric push rod 931. The valve plate 94, the return spring 98, and the pressing plate 96 are sequentially installed in the upper brake chamber 921. The pressing plate 96 can slide along the axis of the upper brake chamber 921. The valve plate 94 has an air outlet 941 and an air inlet 942. The diameter of the air outlet 941 is larger than that of the air inlet 942. A one-way valve 95 is installed at the air outlet 941. There are two lower brake chambers 922. Each lower brake chamber 922 contains a brake block 97 and a return spring 99. The brake block 97 can move along the axis of the lower brake chamber 922. One end of the return spring 99 is connected to the brake block 97, and the other end is connected to the brake seat 92. When the stainless steel tube 10 of the material support mechanism 4 exits the induction heating coil 51, the brake cylinder 93 is activated. The electric push rod 931 of the brake cylinder 93 extends and overcomes the elastic force of the return spring 98 to squeeze the extrusion plate 96 towards the valve plate 94. The gas in the cavity between the extrusion plate 96 and the valve plate 94 is squeezed from the outlet 941 into the lower brake chamber 922. The gas overcomes the elastic force of the return spring 99 to squeeze the two brake blocks 97 to move towards each other. The two brake blocks 97 contact and clamp the brake disc 91 to achieve the braking effect. The electric push rod 931 of the brake cylinder 93 retracts, and the extrusion plate 96 returns to its original position under the return force of the return spring 98. The gas in the lower brake chamber 922 enters the cavity between the extrusion plate 96 and the valve plate 94 through the air inlet 942 on the valve plate 94. The brake blocks 97 gradually move away from the brake disc 91 under the return force of the return spring 99. Because the diameter of the air outlet 941 is larger than the diameter of the air inlet 942, the brake block 97 initially contacts and squeezes the brake disc 91 for a shorter time. Furthermore, the brake block 97 returns to its original position with a delay when separating from the brake disc 91, meaning the separation speed of the brake block 97 from the brake disc 91 is relatively slow. This design allows for a gradual braking of the brake disc 91. This design prevents the material feeding support mechanism 4 from braking too quickly, while the stainless steel pipe 10 continues to rotate due to inertia, causing a torque on the material feeding support mechanism 4 and potentially breaking the material feeding support rod 43.

[0052] Figures 1 to 3 This embodiment illustrates the loading, annealing, and unloading processes, combined with... Figures 1 to 3 The working process of the present invention will be further explained to further demonstrate the working principle and advantages of the present invention:

[0053] S1, hopper discharge: (e.g., ...) Figure 1 As shown, when the hopper 2 needs to discharge material, air is supplied to the supporting cylinder 25. The supporting piston rod extends out of the supporting cylinder 25 and supports the V-shaped support plate 26 to move upward until the end of the V-shaped support plate 26 rises to be flush with the top of the discharge baffle 22. At this point, the supporting cylinder 25 stops supplying air. Air is then supplied to the discharge cylinder 23. The discharge piston rod extends out of the discharge cylinder 23, and the discharge support plate lifts the stainless steel pipe 10. During this process, the stainless steel pipe 10 moves upward along the inner wall of the discharge baffle 22. When the stainless steel pipe 10 is lifted to a height higher than the discharge baffle 22, it slides over the discharge baffle 22 by gravity and onto the V-shaped support plate 26. The supporting piston rod retracts into the supporting cylinder 25, and the V-shaped support plate 26 supports the stainless steel pipe 10 and moves downward to the loading position.

[0054] S2, feeding support mechanism for feeding: such as Figure 1 As shown, when the stainless steel tube 10 moves to the loading position, the loading electric cylinder 31 drives the loading clamp 34 to move towards the stainless steel tube 10 through the loading slider 32 and the loading support rod 33. The loading clamp 34 is inserted into the stainless steel tube 10 and moves to a position near the middle of the stainless steel tube 10. When air is supplied to the air passage 442 through the air pipe 431, the gas compresses the reset piston rod 4431 and retracts into the return cylinder 443. The compression block 444 moves together with the reset piston rod 4431. The compression block 444 simultaneously compresses the three loading clamp blocks to move outward. These three loading clamp blocks press against the inner wall of the stainless steel tube 10, thus fixing the loading clamp 34 to the stainless steel tube 10. The supporting piston rod retracts into the supporting cylinder 25, the V-shaped support plate 26 moves down and separates from the stainless steel tube 10, and the loading electric cylinder 31 continues to drive the loading clamp 34 to move. The loading clamp 34 moves the stainless steel tube 10 to the induction heating mechanism 5 for annealing.

[0055] S3, the supporting rotation mechanism assists in supporting the stainless steel pipe 10: air is supplied to the lifting cylinder 66, the lifting piston rod extends out of the lifting cylinder 66 and drives the roller bracket 65 to move upward, and the roller bracket 65 contacts the stainless steel pipe 10.

[0056] S4, feeding support mechanism 4 supports annealing: feeding electric cylinder 41 drives feeding chuck 44 to move toward stainless steel tube 10 through feeding slider 42 and feeding support rod 43. When feeding chuck 44 is inserted into the middle position of stainless steel tube 10, when air is supplied to air passage 442 through air pipe 431, the gas squeezes reset piston rod 4431 to retract back into position cylinder 443. Squeezing block 444 moves together with reset piston rod 4431. Squeezing block 444 squeezes three feeding clamping blocks 441 outward. The three feeding clamping blocks 441 press against the inner wall of stainless steel tube 10. When the feeding chuck 44 clamps the stainless steel tube 10, air continues to be injected into the air passage 442 through the air pipe 431. The gas enters the sealed cavity through the air inlet 4421 and the locking air pipe. The gas pushes the locking pin 82 to move towards the feeding chuck 44. The locking pin 82 slowly inserts into the locking sleeve 84 and, through the cooperation of the first and second alignment surfaces, aligns the feeding chuck 44 and the feeding support rod 43, making them coaxial. At the same time, the feeding chuck 44 slowly adjusts the position of the stainless steel tube 10, making it coaxial with the feeding support rod 43. When the locking pin 82 is fully inserted into the locking sleeve 84, the support spring 81 can no longer swing. At this time, the feeding chuck 44 and the feeding support rod 43 are locked, which can stably support the stainless steel tube 10. Simultaneously, the feeding support mechanism releases the stainless steel tube 10 and retracts.

[0057] S5, Stainless steel tube annealing: Rotary motor 61 drives the drive wheel to rotate, and the drive wheel drives the roller 64 to rotate through synchronous belt 63 and driven wheel 62. The roller 64 drives the stainless steel tube 10 to rotate around its own central axis, thereby achieving uniform heating at both ends of the stainless steel tube 10 and ensuring the annealing effect.

[0058] S6, Stopping the Rotating Stainless Steel Pipe: When the stainless steel pipe 10 supported by the feeding support mechanism 4 exits the induction heating coil 51, the brake cylinder 93 is activated. The electric push rod 931 of the brake cylinder 93 extends and overcomes the elastic force of the return spring 98 to squeeze the extrusion plate 96 towards the side of the valve plate 94. The gas between the extrusion plate 96 and the valve plate 94 is squeezed from the air outlet 941 into the lower brake chamber 922. The gas overcomes the elastic force of the return spring 99 to squeeze the two brake blocks 97 to move towards each other. The two brake blocks 97 contact and clamp the brake disc 91. The electric push rod 931 of the brake cylinder 93 retracts, and the extrusion plate 96 returns to its original position under the return force of the return spring 98. The gas in the lower brake chamber 922 enters the space between the extrusion plate 96 and the valve plate 94 through the air inlet 942 on the valve plate 94. The brake blocks 97 gradually move away from the brake disc 91 under the return force of the return spring 99. Because the diameter of the air outlet 941 is larger than that of the air inlet 942, the brake pad 97 will return to its original position with a delay. That is, the brake pad 97 will disengage from the brake disc 91 at a slower speed, thus slowly bringing the brake disc 91 to a stop.

[0059] S7, Stainless steel pipe removed from processing area: When the stainless steel pipe 10 stops rotating, the unloading support mechanism 4 supports the stainless steel pipe 10 and moves it above the unloading tray 722, supplies air to the unloading cylinder 72, the unloading piston rod 721 extends out of the unloading cylinder 72, the unloading tray 722 supports the stainless steel pipe 10, the unloading support mechanism 4 releases the stainless steel pipe 10 and withdraws. The unloading piston rod 721 retracts into the unloading cylinder 72, both ends of the stainless steel pipe 10 rest on the steel support 711 and are transported away by the circular conveyor belt 71.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions created by the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions created by the present invention without departing from the essence and scope of the technical solutions created by the present invention.

Claims

1. Stainless steel annealing equipment, characterized in that, The system includes a feeding support mechanism, a discharging support mechanism, an induction heating mechanism, a supporting rotation mechanism, and a discharging conveying mechanism. The feeding support mechanism and the discharging support mechanism are respectively arranged on both sides of the induction heating mechanism. The feeding support mechanism is used for supporting and feeding the stainless steel pipe. The induction heating mechanism is equipped with an induction heating coil to remove residual stress in the stainless steel pipe. The discharging support mechanism is used for supporting and discharging the stainless steel pipe. The supporting rotation mechanism is installed below the induction heating coil for rotating the stainless steel pipe. The discharging conveying mechanism is installed below the discharging support mechanism for removing the annealed stainless steel pipe from the processing area. The feeding support mechanism supports and moves the stainless steel tube into the induction heating coil. The unloading support mechanism supports the stainless steel tube. The feeding support mechanism retracts and supports the next stainless steel tube to be annealed. The supporting rotation mechanism drives the stainless steel tube to rotate. The induction heating coil heats the end of the stainless steel tube to remove the residual stress at the end of the stainless steel tube. The unloading support mechanism moves the stainless steel tube to the unloading conveyor to make way for the induction heating position, so that the loading support mechanism can continue to support and move the next stainless steel tube to the induction heating coil for annealing. The feeding support mechanism includes a feeding electric cylinder, a feeding slider, a feeding support rod, and a feeding clamp. The feeding electric cylinder is driven and connected to the feeding slider. One end of the feeding support rod is rotatably mounted to the feeding slider, and the other end is connected to the feeding clamp. The feeding clamp is used to clamp and support the stainless steel tube. An air passage is opened along the axial direction inside the feeding clamp, and multiple slides communicating with the air passage are opened in the circumferential direction of the feeding clamp. A feeding clamp block is set in each slide. A reset cylinder is set at one end of the air passage. The reset cylinder is equipped with a reset piston rod, which can extend or retract to return to the positioning cylinder. A pressing block is also installed on the reset piston rod. The outer wall of the pressing block contacts and can press the feeding clamp block outward. When air is supplied into the air passage, the gas presses the reset piston rod to retract back into the positioning cylinder. The pressing block moves together with the reset piston rod. The pressing block simultaneously presses multiple feeding clamp blocks outward. These multiple feeding clamp blocks press against the inner wall of the stainless steel tube to achieve clamping. A braking mechanism is provided at the tail end of the feeding support mechanism. When the stainless steel tube exits the induction heating coil, the braking mechanism is activated and gradually stops the stainless steel tube to prevent it from falling off when supported by the feeding conveyor mechanism. The braking mechanism includes a brake disc and a brake assembly. The brake disc is installed at the tail end of the unloading support rod. The brake assembly includes a brake seat, an electric cylinder, a valve plate, a one-way valve, a pressing plate, a brake block, a reset spring, and a return spring. The brake seat is installed on the unloading slider. The brake seat has an upper brake chamber and a lower brake chamber, which are connected. The electric cylinder is installed in the upper brake chamber and has an electric push rod. The valve plate, reset spring, and pressing plate are installed in the upper brake chamber in sequence. The pressing plate can slide along the axis of the upper brake chamber. The valve plate has an air outlet and an air inlet. The diameter of the air outlet is larger than the diameter of the air inlet. The one-way valve is installed at the air outlet. There are two lower brake chambers. Each lower brake chamber has a brake block and a return spring installed in it. The brake block can move along the axis of the lower brake chamber. One end of the return spring is connected to the brake block, and the other end is connected to the brake seat.

2. The stainless steel annealing equipment according to claim 1, characterized in that, The material support rod is made of ceramic or glass.

3. The stainless steel annealing equipment according to claim 2, characterized in that, A flexible self-locking mechanism is also provided between the feeding support rod and the feeding clamp. When the feeding clamp is inserted into the stainless steel pipe, the flexible self-locking mechanism unlocks, and the feeding clamp can move to make the feeding clamp coaxial with the stainless steel pipe. After the feeding clamp holds the stainless steel pipe, the flexible self-locking mechanism locks, and the feeding support rod straightens the stainless steel pipe through the feeding clamp to make the stainless steel pipe coaxial with the feeding support rod.

4. The stainless steel annealing equipment according to claim 3, characterized in that, The flexible self-locking mechanism includes a support spring, a locking pin, a sliding sleeve, and a locking sleeve. The locking sleeve is installed on the unloading clamp, and a first alignment surface is provided on the side of the locking sleeve facing the unloading support rod. The locking pin is cylindrical, with one end facing the locking sleeve, and this end has a second alignment surface that mates with the first alignment surface. The sliding sleeve is installed on the unloading support rod, and a circular slide is provided on the side of the sliding sleeve facing the unloading clamp. The other end of the locking pin is inserted into the circular slide and can move axially, forming a sealed cavity between the locking pin and the circular slide. An air inlet is provided in the air passage of the unloading clamp, and the air inlet communicates with the sealed cavity.

5. The stainless steel annealing equipment according to claim 4, characterized in that, The feeding support mechanism also includes a connecting conductor, a slip ring, and a brush. The slip ring is fitted on the feeding support rod and can rotate with the feeding support rod. The brush is installed on the feeding slider and contacts the slip ring. One end of the connecting conductor is connected to the slip ring, and the other end is connected to the support spring.

6. The stainless steel annealing equipment according to claim 2, characterized in that, The supporting rotation mechanism includes a rotary motor, rollers, roller brackets, and a lifting cylinder. The lifting cylinder is equipped with a lifting piston rod, which can extend or retract into the lifting cylinder. The roller bracket is installed at the end of the lifting piston rod, and the rollers are rotatably installed on the roller bracket. The rotary motor is connected to the roller drive.

7. The stainless steel annealing equipment according to claim 6, characterized in that, A guide rod, a buffer spring, and a support plate are also provided between the roller bracket and the lifting piston rod. The support plate is fixedly installed on the top of the lifting piston rod. One end of the guide rod is connected to the support plate, and the other end is slidably connected to the roller bracket. A buffer spring is sleeved on the guide rod.

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