Apartment bed metal pipe heat treatment grading feeding device

Abstract

The application discloses an apartment bed metal pipe heat treatment grading feeding device, and relates to the technical field of feeding devices, which comprises a feeding frame, and an adjusting assembly is arranged on the feeding frame; the adjusting assembly comprises two adjusting frames fixedly connected to the top of the feeding frame; the inner cavities of the two adjusting frames are provided with a plurality of adjusting grooves; and two adjusting racks are arranged inside each adjusting frame. The support pitch and effective conveying length of the metal pipe are changed through equidistant displacement of a plurality of rollers, so that the conveying requirements of metal pipes with different lengths can be met; the sliding of the adjusting racks in the adjusting grooves and the sliding of a plurality of driven plates on the adjusting racks can make the rollers move linearly along fixed displacement tracks, the problem of roller deflection caused by the scissor structure is avoided, and the rollers can always remain on the original conveying track after pitch adjustment, so that the metal pipe can be effectively and linearly fed and conveyed.

Description

Technical Field

[0001] This invention relates to the field of feeding device technology, and more specifically, to a graded feeding device for heat treatment of metal tubing for apartment beds. Background Technology

[0002] In the heat treatment of metal pipes, roller conveyors are the most common feeding and conveying equipment. After the pipes are heated in the furnace, they need to be conveyed sequentially by multiple sets of roller conveyors at a set speed. Existing roller conveyor systems typically include a feeding frame, multiple parallel rollers mounted on the frame, and a power system for driving the rollers to rotate. The rollers are mounted on the frame via bearings and shafts, and multiple rollers rotate synchronously via chains or drive shafts. The pipes are placed on the rotating rollers, and axial feeding is achieved by the friction between the rollers and the pipes.

[0003] The existing roller conveyor system has a fixed roller spacing, making it difficult to adjust the support pitch according to the different lengths, wall thicknesses, and stiffnesses of the metal tubing used in apartment beds. For tubing with longer length and higher stiffness, the roller spacing can be appropriately increased to expand the effective conveying coverage length of the device with a fixed number of rollers. For tubing with thinner walls or lower bending stiffness, the roller spacing can be reduced to increase the support density per unit length, reducing the possibility of sagging or deformation during tubing conveying. In addition, different conveying speeds are required for different temperature zones in the heat treatment production line, and rear-end collisions are prone to occur when switching speeds between batches of tubing, seriously affecting the efficiency and continuity of heat treatment production. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a graded feeding device for heat treatment of metal tubing for apartment beds.

[0005] The technical solution is as follows:

[0006] A graded feeding device for heat treatment of metal tubing for apartment beds includes a feeding frame and an adjustment component on the feeding frame.

[0007] The adjustment assembly includes two adjustment frames fixedly connected to the top of the feed frame. The inner cavity of the two adjustment frames has multiple adjustment slots. Each adjustment frame has two adjustment brackets inside. The two adjustment brackets in the same adjustment frame are a group. Multiple driven plates are slidably connected to the inner side of each adjustment bracket. Bearings are fixedly connected to the adjustment brackets and multiple driven plates. A rotating shaft is rotatably connected inside each bearing. A sprocket is fixedly connected to each rotating shaft. A roller is fixedly connected between every two opposing sprockets. Multiple sprockets on one side of the same adjustment frame are connected to a chain for transmission. Two chains are set for the two adjustment frames respectively. Two buffer slots are opened on the inner side of the feed frame. A counterweight plate is slidably connected inside the two buffer slots. Sprockets are rotatably connected to both ends of the counterweight plate. The bottom of the chain is respectively connected to the two sprockets. A first cross linkage group is rotatably connected to the side of multiple rotating shafts away from the sprockets. An assembly assembly is set on the adjustment frame. A locking assembly is set on the first cross linkage group.

[0008] The locking assembly includes two mounting sleeves that are rotatably connected to the middle hinge positions of the two scissor arms in the first cross linkage group. There are two mounting sleeves, and each mounting sleeve is fixedly connected to a fastening plate by bolts. One fastening plate is fixedly connected to a limit groove ring. A threaded rod is rotatably connected to the fastening plate fixedly connected to the limit groove ring. A knob sleeve is horizontally slidably connected to one end of the threaded rod near the limit groove ring. A spring is fixedly connected between the knob sleeve and the threaded rod. A limit rod is fixedly connected to the side of the knob sleeve near the limit groove ring. A lifting assembly is provided on the roller.

[0009] Preferably, the cross-sectional shape of the adjusting groove is T-shaped. The adjusting frame includes a vertical plate and two T-shaped guide rods fixedly connected to the inner side of the vertical plate. The upper and lower ends of the vertical plate are respectively provided with T-shaped sliding parts adapted to the adjusting groove. The T-shaped sliding parts are slidably connected to the corresponding adjusting groove. The upper and lower ends of each driven plate are provided with Y-shaped sliding parts adapted to the T-shaped guide rods. The driven plates are slidably connected to the two T-shaped guide rods through the Y-shaped sliding parts. One of the rotating shafts is driven by a motor. The first cross linkage group includes multiple scissor frames arranged sequentially along the length direction of the feed frame. Each scissor frame includes two first connecting rods arranged in a cross manner. The middle parts of the two first connecting rods are hinged to each other. The ends of the first connecting rods corresponding to two adjacent scissor frames are hinged to each other to form a continuous scissor linkage structure that can extend and retract along the length direction of the feed frame. Multiple rotating shafts are rotatably connected to the corresponding hinged positions of the first cross linkage group, so that when the first cross linkage group extends and retracts, it can drive multiple rotating shafts to move synchronously and equidistantly along the length direction of the feed frame.

[0010] Preferably, the assembly includes a fixing block 1 fixedly connected to one of the adjustment frames in the same group, the fixing block 1 having two slots, a fixing block 2 fixedly connected to the other adjustment frame in the same group, the fixing block 2 having a movable groove, two slots slidably connected inside the movable groove, and two springs 1 fixedly connected to the inner cavity of the movable groove, the ends of the two springs 1 away from the movable groove being fixedly connected to the two slots respectively.

[0011] Preferably, the two slots are formed by combining a small rectangular slot and a large rectangular slot into an L shape, the two blocks extend outward through the movable slot, and a triangular block is fixedly connected to one end of each block on the outside of the movable slot. A protruding rod is fixedly connected to the same side of each block, and the protruding rods of both blocks extend outward to the outside of the movable slot.

[0012] Preferably, the fastening plate without a fixed locating groove ring has a threaded hole, and the end of the threaded rod away from the knob sleeve is threadedly connected to the threaded hole of the fastening plate. The outer edge of the locating groove ring has multiple circular grooves, and the locating rod is stuck in the circular groove of the locating groove ring. The end of the threaded rod near the knob sleeve has a parallel groove, and a slider is fixedly connected inside the knob sleeve. The slider of the knob sleeve slides in the parallel groove of the threaded rod.

[0013] Preferably, the lifting assembly includes multiple sets of second cross linkage groups arranged sequentially along the length of the feed frame. Each second cross linkage group includes multiple scissor groups arranged continuously. Each scissor group includes two intersecting second connecting rods. The middle parts of the two second connecting rods are hinged to each other. The ends of the corresponding second connecting rods of two adjacent scissor groups are hinged to each other. Linkage rods are provided at the corresponding hinge positions of the multiple scissor groups. The upper hinge ends of the multiple scissor groups are respectively movably connected to multiple rollers. Linkage frames are vertically slidably connected to the multiple linkage rods. Driven rollers are rotatably connected to the top of the multiple linkage frames. Multiple electric telescopic rods are fixedly connected to the inner side of the feed frame. Connecting rods are fixedly connected to the telescopic shafts of the multiple electric telescopic rods. Lifting frames are fixedly connected to the bottom of the multiple connecting rods.

[0014] Preferably, multiple driven rollers are located between every two rollers, the diameter of the driven rollers is smaller than the distance between the two rollers, and the bottoms of multiple linkage frames slide on the lifting frame.

[0015] As described above, the beneficial effects of the graded feeding device for heat treatment of metal tubing for apartment beds in this invention are as follows:

[0016] By altering the support pitch and effective conveying length of the metal pipe through the equidistant displacement of multiple rollers, it is possible to adapt to the conveying requirements of metal pipes of different lengths. At the same time, the sliding of the adjusting frame inside the adjusting groove and the sliding of multiple driven plates on the adjusting frame enable the rollers to move linearly along a fixed displacement trajectory, avoiding the roller swaying problem caused by the scissor structure. This ensures that the rollers always remain on the original conveying trajectory after the pitch is adjusted, allowing the metal pipes to be effectively fed and conveyed in a linear manner.

[0017] By forming a snap-fit ​​relationship between the card block and the card slot, the first fixed block and the second fixed block are snap-fitted and fixed, thereby realizing the assembly of the two roller conveyor devices. The number can be flexibly increased or decreased according to the space and heat treatment process length requirements to adjust the total conveying length. There is no need to customize non-standard equipment for different production lines. After disassembly, each roller conveyor device can be used independently and flexibly adjusted to meet various conveying requirements of metal pipes.

[0018] The fastening plate locks the movement of the first cross linkage group by locking the mounting sleeve. The engagement between the limit rod and the limit groove ring stabilizes the position of the roller adjustment gap, effectively preventing the roller gap between the two rollers from changing due to vibration or impact under high temperature, heavy load and continuous operation conditions, and effectively ensuring the support stability of the heat-treated metal pipe conveying process.

[0019] By raising and lowering the driven roller, the conveying distance of multiple batches of metal pipes can be controlled, avoiding collisions and end damage between batches of metal pipes during variable speed conveying. After the metal pipes are raised, they are no longer in contact with the rollers, which can release the active conveying effect of the rollers 28 on the metal pipes. Under the damping effect, the metal pipes are gradually slowed down and temporarily stored. It can also prevent the metal pipes from being in contact with the rollers after the conveying stops, thus preventing wear. This effectively ensures the safety of continuous feeding and conveying of multiple batches of metal pipes. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall components of the present invention;

[0021] Figure 2 This is a three-dimensional cross-sectional view of the components of the present invention, including the feeding frame, electric telescopic rod, connecting rod, and lifting frame.

[0022] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of component A in the middle;

[0023] Figure 4 This is a three-dimensional schematic diagram of the adjusting frame, driven plate, rotating shaft, and other components of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of component at point B;

[0025] Figure 6 This is a three-dimensional schematic diagram of the first cross linkage group, rotating sleeve, fastening plate, threaded rod, and other components of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of component at point C;

[0027] Figure 8 This is a three-dimensional cross-sectional view of the card slot, card block, and other components of the present invention;

[0028] Figure 9 This is a three-dimensional schematic diagram of the components of the present invention, including the counterweight plate, sprocket two, chain, and second cross linkage group.

[0029] Figure 10 This is a three-dimensional cross-sectional view of the overall components of the present invention;

[0030] Figure 11 This is a three-dimensional schematic diagram of the linkage rod, linkage frame, driven roller, and other components of the present invention.

[0031] The reference numerals in the accompanying drawings of this invention are as follows:

[0032] 1. Feed frame;

[0033] 21. Adjusting frame; 22. Adjusting groove; 23. Adjusting bracket; 24. Driven plate; 25. Bearing; 26. Rotating shaft; 27. Sprocket one; 28. Roller; 29. ​​Chain; 210. Buffer groove; 211. Counterweight plate; 212. Sprocket two; 213. First cross linkage group;

[0034] 31. Fixing block one; 32. Slot; 33. Fixing block two; 34. Movable slot; 35. Locking block; 36. Spring one;

[0035] 41. Mounting sleeve; 42. Fastening plate; 43. Limiting groove ring; 44. Threaded rod; 45. Knob sleeve; 46. Spring 2; 47. Limiting rod;

[0036] 51. Second cross linkage group; 52. Linkage rod; 53. Linkage frame; 54. Driven roller; 55. Electric telescopic rod; 56. Connecting rod; 57. Lifting frame. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The embodiments provided by the present invention will be described in detail below:

[0039] like Figures 1 to 4 and Figure 9 As shown, a heat treatment grading feeding device for metal tubing for apartment beds includes a feeding frame 1, on which an adjustment component for adjusting the roller support pitch and the effective conveying coverage length is provided.

[0040] The adjustment assembly includes two adjustment frames 21 fixedly connected to the top of the feed frame 1. Adjustment slots 22 are provided at the top and bottom of the inner cavities of both adjustment frames 21. Each adjustment frame 21 contains two adjustment brackets 23, with two adjustment brackets 23 within the same frame forming a group. Multiple driven plates 24 arranged in a linear array are slidably connected to the inner side of each adjustment bracket 23. Bearings 25 are fixedly connected to each adjustment bracket 23 and the multiple driven plates 24. A rotating shaft 26 is rotatably connected inside each bearing 25, and a sprocket 27 is fixedly connected to each rotating shaft 26. Each pair of opposing sprockets... Each sprocket 27 is fixedly connected to a roller 28. Multiple sprockets 27 located on one side of the same adjustment frame 21 are connected to a chain 29. Two chains 29 are provided for each of the two adjustment frames 21. Two buffer grooves 210 are opened on the inner side of the feed frame 1. A counterweight plate 211 is slidably connected to the inner side of the two buffer grooves 210. Both ends of the counterweight plate 211 are rotatably connected to sprockets 212. The bottom of the chain 29 is connected to the two sprockets 212 respectively. A set of first cross linkages 213 is rotatably connected to the side of multiple rotating shafts 26 away from the sprockets 27.

[0041] It should be noted that the cross-sectional shape of the adjustment groove 22 is T-shaped. The adjustment frame 23 includes a vertical plate and two T-shaped guide rods fixedly connected to the inner side of the vertical plate. The upper and lower ends of the vertical plate are respectively provided with T-shaped sliding parts adapted to the adjustment groove 22. The T-shaped sliding parts are slidably connected to the corresponding adjustment groove 22. The two T-shaped guide rods extend along the length direction of the feed frame 1. The upper and lower ends of each driven plate 24 are provided with Y-shaped sliding parts adapted to the T-shaped guide rods. The driven plate 24 is slidably connected to the two T-shaped guide rods through the Y-shaped sliding parts. One of the rotating shafts 26 is driven by a motor. The first cross linkage group 213 includes multiple shears arranged sequentially along the length direction of the feed frame 1. Each scissor lift includes two intersecting first links, with the middle of the two first links hinged to each other. The ends of the first links of two adjacent scissor lifts are also hinged to each other, forming a continuous scissor-type linkage structure that can extend and retract along the length of the feed frame 1. Multiple rotating shafts 26 are rotatably connected to the corresponding hinged positions of the first intersecting linkage group 213, so that when the first intersecting linkage group 213 extends and retracts, it can drive the multiple rotating shafts 26 to move synchronously and equidistantly along the length of the feed frame 1. The vertical length of the buffer groove 210 meets the chain length compensation requirement corresponding to the maximum adjustment amount of the roller 28. The counterweight plate 211 can only move in the vertical direction under the guidance of the two buffer grooves 210.

[0042] Specifically, during the conveying of metal pipes, the motor is started, driving the connected shaft 26 to rotate. The shaft 26 drives the first sprocket 27 to rotate synchronously, and the power is transmitted to the other sprockets 27 via the chain 29, thus causing multiple sprockets 27 and their corresponding rollers 28 to rotate synchronously. During the transmission process, the chain 29 simultaneously drives the second sprocket 212 to rotate on the counterweight plate 211, enabling the chain 29 to continuously circulate along the multiple sprockets 27 and the second sprocket 212. After the metal pipe to be heat-treated is placed on the multiple rollers 28, the friction between the rollers 28 and the metal pipe drives the metal pipe to move along the conveying direction.

[0043] When it is necessary to adjust the support pitch between adjacent rollers 28 and the effective conveying coverage length of the device according to the length, wall thickness, or rigidity of the metal pipe, the conveying operation of rollers 28 should be stopped first, and then the adjusting frame 23 should be pulled to slide along the adjusting groove 22 to the outside or inside of the adjusting frame 21. During the movement of the adjusting frame 23, the corresponding rotating shaft 26 is driven to move along the length direction of the feed frame 1 through the bearing 25. The movement of the rotating shaft 26 further drives the corresponding hinge position of the scissor frame in the first cross linkage group 213 to be displaced, so that multiple continuously arranged scissor frames extend or retract synchronously. Since each scissor frame is composed of two first connecting rods of equal length that are arranged in a cross configuration, and the ends of the first connecting rods corresponding to adjacent scissor frames are hinged in sequence, when the cross angle of one scissor frame changes, its displacement can be transmitted in sequence through the adjacent scissor frames, so that the cross angle of multiple scissor frames changes synchronously, and the multiple rotating shafts 26 set at the corresponding hinge positions of the first cross linkage group 213 are synchronously and equidistantly displaced along the length direction of the feed frame 1. During the equidistant displacement of multiple rotating shafts 26, each rotating shaft 26 drives its corresponding driven plate 24 to move synchronously via bearing 25. The Y-shaped sliding part of the driven plate 24 slides along the T-shaped guide rod on the adjusting frame 23. The T-shaped guide rod restricts the movement direction of the driven plate 24, ensuring that the driven plate 24 and the rotating shaft 26 move linearly along the length of the feed frame 1. This reduces the possibility of lateral swaying of the rotating shaft 26 and roller 28 during the extension and retraction of the scissor linkage structure. At the same time, the rotating shaft 26 drives the corresponding sprocket 27 and roller 28 to move synchronously, causing the spacing between the multiple rollers 28 to increase or decrease synchronously. When the spacing between the rollers 28 increases, the effective conveying coverage length of the device can be expanded with a fixed number of rollers. When the spacing between the rollers 28 decreases, the support density of the metal pipe within a unit length range can be increased, thus allowing for adaptive adjustment of the support pitch of the rollers 28 according to the conveying requirements of different specifications of metal pipes.

[0044] It should be noted that the above-mentioned adjustment of the spacing of multiple rollers 28 can only be performed when the equipment is stopped. The two driven plates 24 located at both ends of the same roller 28 are respectively connected to the corresponding first cross linkage group 213. The two first cross linkage groups 213 extend and retract synchronously, so that the two ends of the roller 28 move synchronously along the length direction of the adjustment frame 21 to keep the axial direction of the roller 28 from deflecting. During the adjustment of the spacing of the rollers 28, the spacing between multiple sprockets 27 is adjusted synchronously. To ensure that the chain 29 effectively maintains the transmission with the sprockets 27, The dynamic connection relationship, and to ensure that the adjustment of the sprocket spacing 27 is not constrained by the chain 29, can be used to pull the chain 29 when the sprocket spacing 27 is widened. After being pulled by the sprocket 27, the chain 29 will be further tightened. The tightened chain 29 will cause the two sprockets 212 at the bottom to move upward synchronously. The sprockets 212 will drive the counterweight plate 211 to slide upward inside the buffer groove 210. The weight of the counterweight plate 211 will make the sprockets 212 always apply downward pressure to the chain 29, so that the chain 29 always maintains the predetermined tension.

[0045] like Figure 5 and Figure 8 As shown, the adjustment frame 23 is equipped with an assembly component for modular assembly feeding. The assembly component includes a fixing block 31 fixedly connected to one of the adjustment frames 23 in the same group. The fixing block 31 has two slots 32. The other adjustment frame 23 in the same group is fixedly connected to a fixing block 33. The fixing block 33 has a movable groove 34. The movable groove 34 has two slots 35 slidably connected inside. The top and bottom of the inner cavity of the movable groove 34 are fixedly connected to springs 36. The ends of the two springs 36 away from the movable groove 34 are fixedly connected to the two slots 35 respectively.

[0046] It should be noted that the two slots 32 are respectively composed of a small rectangular slot and a large rectangular slot to form an L-shape. The two blocks 35 extend outward from the movable slot 34. A triangular block is fixedly connected to one end of each block 35 on the outside of the movable slot 34. When the inclined surface of the triangular block of the block 35 contacts the slot wall of the slot 32, it can guide the block 35 to slide towards the center inside the movable slot 34. A protruding rod is fixedly connected to the same side of each block 35. The protruding rods of the two blocks 35 extend outward to the outside of the movable slot 34, which is convenient for the staff to hold and press.

[0047] Specifically, although the distance between rollers 28 can be adjusted to increase the conveyable length, for longer conveying distances, simply adjusting the distance between rollers 28 is insufficient. Therefore, multiple roller conveyor systems can be assembled. The adjusting frame 23 is aligned with the adjusting frame 23 of another roller conveyor device, so that fixed block 1 31 and fixed block 2 33 correspond to each other. When fixed block 2 33 moves closer to fixed block 1 31, fixed block 2 33 will drive two locking blocks 35 within it to move synchronously towards fixed block 1 31 via the movable groove 34. The two locking blocks 35 will enter the interior of the two locking slots 32 respectively. During the process of the two locking blocks 35 entering the interior of the two locking slots 32, the inclined surfaces of the triangular blocks of the two locking blocks 35 will be restricted by the groove walls of the two locking slots 32 respectively. As the two locking blocks 35 continue to move, they will slide towards the center inside the movable groove 34, that is, the two locking blocks 35 will slide towards each other. The sliding of the two locking blocks 35... Spring 36 will be stretched separately. When the two locking blocks 35 are fully inserted into the slot 32, the elastic reset action of spring 36 will cause the two locking blocks 35 to slide to both sides inside the movable slot 34. At this time, the triangular block of the locking block 35 will be inserted into the small rectangular slot of the slot 32, thus forming a locking relationship between the locking block 35 and the slot 32. This allows the fixing block 31 and the fixing block 33 to be locked together, thereby realizing the assembly of the two roller conveyor devices. The number can be flexibly increased or decreased according to the space and heat treatment process length requirements to adjust the total conveying length. There is no need to customize non-standard equipment for different production lines. After disassembly, each roller conveyor device can be used independently and flexibly adjusted to meet various conveying requirements of metal pipes.

[0048] It should be noted that when the two roller conveyor devices need to be dismantled, the worker can hold the protruding rods of the two locking blocks 35, press down on the protruding rods of the two locking blocks 35, and then slide the two locking blocks 35 towards each other inside the movable groove 34. The sliding of the two locking blocks 35 will stretch the two springs 36. The movement of the two locking blocks 35 will cause the triangular blocks on them to move from the small rectangular grooves of the two locking slots 32 to the large rectangular grooves. Thus, the triangular blocks of the two locking blocks 35 will no longer be engaged with the inside of the two locking slots 32. At this time, The two adjusting brackets 23 move to both sides, and the first fixing block 31 and the second fixing block 33 will move away from each other. The second fixing block 33 will drive the two locking blocks 35 to move synchronously through the movable groove 34. At this time, the two locking blocks 35 will move outward from inside the two locking slots 32. When the two locking blocks 35 move to the outside of the two locking slots 32, the operator releases the protrusions of the two locking blocks 35. Under the elastic reset action of the two springs 36, the two locking blocks 35 will slide away from each other inside the movable groove 34, which facilitates the subsequent assembly operation.

[0049] like Figure 1 , Figure 6 and Figure 7As shown, the first cross linkage group 213 is provided with a locking assembly for locking the position of the roller 28. The locking assembly includes two mounting sleeves 41 that are respectively rotatably connected to the middle hinge position of the two scissor arms in the first cross linkage group 213. There are two mounting sleeves 41, and fastening plates 42 are fixedly connected to both mounting sleeves 41 by bolts. A limit groove ring 43 is fixedly connected to one of the fastening plates 42. A threaded rod 44 is rotatably connected to the fastening plate 42 that is fixedly connected to the limit groove ring 43. A knob sleeve 45 is horizontally slidably connected to one end of the threaded rod 44 near the limit groove ring 43. A spring 46 is fixedly connected between the knob sleeve 45 and the threaded rod 44. A limit rod 47 is fixedly connected to the side of the knob sleeve 45 near the limit groove ring 43.

[0050] It should be noted that the fastening plate 42, which is not fixedly connected to the limiting groove ring 43, has a threaded hole. The end of the threaded rod 44 away from the knob sleeve 45 is threadedly connected to the threaded hole of the fastening plate 42. The outer edge of the limiting groove ring 43 has multiple circular grooves arranged in a ring array. The limiting rod 47 is stuck in the circular groove of the limiting groove ring 43. The end of the threaded rod 44 near the knob sleeve 45 has a parallel groove. A slider is fixedly connected inside the knob sleeve 45. The slider of the knob sleeve 45 slides in the parallel groove of the threaded rod 44 to restrict the knob sleeve 45 from rotating circumferentially relative to the threaded rod 44, while allowing the knob sleeve 45 to slide axially along the threaded rod 44, so that when the operator rotates the knob sleeve 45, the threaded rod 44 can be rotated synchronously.

[0051] Specifically, when adjusting the spacing using the first cross linkage group 213, the operator can hold and pull the knob sleeve 45, causing it to slide on the outer surface of the threaded rod 44 away from the limiting groove ring 43. During this movement, the knob sleeve 45 pulls the second spring 46, and simultaneously, it causes the limiting rod 47 to no longer engage with the circular groove of the limiting groove ring 43. Then, rotating the knob sleeve 45 causes it to rotate the threaded rod 44 on the fastening plate 42 via the slider and the parallel groove of the threaded rod 44. The rotating threaded rod 44 then drives... The threaded fastening plate 42 moves away from the knob sleeve 45 on the threaded rod 44. Even if the distance between the two fastening plates 42 increases, during the movement of the two fastening plates 42, the two mounting sleeves 41 will respectively cause the cross hinge points of the two first cross linkage groups 213 to move away from each other. According to the above-mentioned pitch-changing principle of the first cross linkage group 213, the first cross linkage group 213 can also be driven to perform pitch-changing movement. After the distance between the rollers 28 is adjusted by the first cross linkage group 213, the operator can loosen the knob sleeve 45. Under the elastic reset action of the second 46, the knob sleeve 45 moves towards the side of the limiting groove ring 43 on the threaded rod 44. Then, during the movement, the knob sleeve 45 will drive the limiting rod 47 to engage again with the circular groove adjacent to the limiting groove ring 43. Through the engagement of the limiting rod 47 with the circular groove of the limiting groove ring 43, the rotation of the knob sleeve 45 can be locked. After the knob sleeve 45 stops rotating, the threaded rod 44 cannot rotate inside the fastening plate 42. At the same time, under the threaded connection between the threaded rod 44 and the threaded hole of the fastening plate 42, the two fastening plates 42 are locked. The spacing between the two fastening plates 42 remains stable, preventing accidental rotation of the threaded rod 44 from causing changes in the spacing between the two fastening plates 42. Through the fastening plates 42, the mounting sleeve 41 can lock the pitch change movement of the first cross linkage group 213. Through the snap-fit ​​relationship between the limiting rod 47 and the limiting groove ring 43, the stability of the adjustment position of the roller 28 can be achieved, effectively preventing the change in the roller spacing between the two rollers 28 due to vibration or impact under high temperature, heavy load and continuous operation conditions, and effectively ensuring the support stability of the heat-treated metal pipe conveying process.

[0052] like Figure 1 , Figure 2 , Figure 9 and Figure 11As shown, the roller 28 is equipped with a lifting assembly for graded conveying of metal pipes. The lifting assembly includes multiple sets of second cross linkage groups 51 arranged sequentially along the length of the feed frame 1. Each second cross linkage group 51 includes multiple continuously arranged scissor groups. Each scissor group includes two intersecting second connecting rods. The middle parts of the two second connecting rods are hinged to each other. The ends of the corresponding second connecting rods of two adjacent scissor groups are hinged to each other. Linkage rods 52 are provided at the corresponding hinge positions of the multiple scissor groups. The upper ends of the multiple scissor groups are movably connected to the adjacent roller 28. Linkage frames 53 are vertically slidably connected to the multiple linkage rods 52. Driven rollers 54 are rotatably connected to the top of the multiple linkage frames 53. Multiple electric telescopic rods 55 are fixedly connected to the inner side of the feed frame 1. Connecting rods 56 are fixedly connected to the telescopic shafts of the multiple electric telescopic rods 55. Lifting frames 57 are fixedly connected to the bottom of the multiple connecting rods 56.

[0053] It should be noted that each of the second cross linkage groups 51 has a rotating sleeve at the top of the scissor group. The rotating sleeve is rotatably fitted onto the end of the corresponding roller 28 and located outside the conveying and bearing area of ​​the metal pipe, so that the second cross linkage group 51 can extend and retract synchronously with the horizontal displacement of the roller 28. At the same time, the rotating sleeve allows the roller 28 to rotate freely relative to the second cross linkage group 51, preventing the conveying rotation of the roller 28 from driving the second cross linkage group 51 to rotate. A friction damping element is provided at the rotational connection between the linkage frame 53 and the driven roller 54 to limit the rotation of the driven roller 54 on the linkage frame 53. Multiple driven rollers 54 are located between every two rollers 28. The diameter of the driven roller 54 is smaller than the distance between the two rollers 28, so that when the linkage frame 53 drives the driven roller 54 to move upward, it can effectively pass between the two rollers 28 and then move above the roller 28. The bottom of multiple linkage frames 53 slides on the lifting frame 57.

[0054] Specifically, in the continuous heat treatment production process of metal pipes, different heat treatment sections have different requirements for heating temperature and residence time of the pipes. Therefore, the metal pipes can be transported in segments by multiple independent roller conveyor modules at different conveying speeds. However, the transport of multiple batches of metal pipes during heat treatment will interfere with each other. After the previous batch of metal pipes is transported to the slow roller conveyor device, the speed is reduced, while the subsequent batch of metal pipes is still transported at a relatively fast speed, which will cause the subsequent batch of metal pipes to collide with the previous batch of metal pipes. To address this, different batches of metal pipes can be transported in stages. Different batches of metal pipes are placed on roller 28. If the distance between the previous batch and the next batch is close, the transport of the next batch can be paused. The controller controls the synchronous extension of the telescopic shaft of the electric telescopic rod 55. The telescopic shaft of the electric telescopic rod 55 drives the lifting frame 57 upward via the connecting rod 56. When the lifting frame 57 moves upward, it drives multiple linkage frames 53 to move upward synchronously. These linkage frames 53 then drive multiple driven rollers 54 to slide upward synchronously on multiple linkage rods 52. As roller 54 moves upward, it passes through the space between every two rollers 28. When the upper surface of driven roller 54 moves to be flush with the upper surface of roller 28, it contacts the metal tube being conveyed by roller 28. As driven roller 54 continues to move upward, it pushes the metal tube located on roller 28, causing the metal tube to leave the upper surface of roller 28. During this process, the conveying of the metal tube by roller 28 generates inertia. After driven roller 54 pushes the metal tube, the inertia of the metal tube causes driven roller 54 to rotate on linkage frame 53. Because driven roller 54 and linkage frame 53 are designed... With the addition of a friction damping element, although the inertia of the metal tube can drive the driven roller 54 to rotate, the friction damping element applies resistance to the rotation of the driven roller 54, causing the rotational speed of the driven roller 54 to gradually decrease. The friction between the driven roller 54 and the metal tube gradually consumes the inertia of the metal tube, thus slowing down the metal tube and temporarily storing it on the driven roller 54. At this time, the metal tube is no longer in contact with the roller 28, and the pushed metal tube is no longer actively conveyed by the roller 28, thereby temporarily slowing down the conveying of the metal tube. After the previous batch of metal tubes has moved a certain distance, a buffer zone can be maintained between it and the next batch of metal tubes. The distance of the impact is then controlled by the controller to retract the telescopic shaft of the electric telescopic rod 55 downwards. The telescopic shaft of the electric telescopic rod 55 will drive the lifting frame 57 to move downwards synchronously through the connecting rod 56. The lifting frame 57 will drive multiple linkage frames 53 to slide downwards synchronously on multiple linkage rods 52. The multiple linkage frames 53 will drive multiple driven rollers 54 to move downwards synchronously. When the upper surface of the driven roller 54 descends to a position flush with the upper surface of the roller 28, the lower surface of the metal tube on the driven roller 54 will contact the upper surface of the roller 28. After the driven roller 54 continues to move downwards, it will no longer contact the metal tube.The metal pipes fall onto the upper surface of roller 28 and continue to be conveyed under the rotational conveying action of roller 28. The conveying distance between multiple batches of metal pipes can be controlled by raising and lowering the driven roller 54, avoiding collisions and end damage between batches during variable-speed conveying. Lifting the metal pipes so they are no longer in contact with roller 28 releases the active conveying action exerted by roller 28 on the metal pipes. Under damping action, the metal pipes gradually decelerate and are temporarily stored. This also prevents the metal pipes from remaining in contact with roller 28 after conveying stops, thus preventing wear and effectively ensuring the safety of continuous feeding and conveying of multiple batches of metal pipes.

[0055] It should be noted that during the process of adjusting the spacing of multiple rollers 28, when the multiple rollers 28 move to adjust the spacing, the multiple rollers 28 will drive the second cross linkage group 51 to move synchronously. The second cross linkage group 51 operates on the same principle as the first cross linkage group 213. When the second cross linkage group 51 moves, it will drive the linkage rod 52 to move synchronously to adjust the spacing. The linkage rod 52 will drive the driven roller 54 to move synchronously to adjust the spacing through the linkage frame 53. The linkage frame 53 will slide on the lifting frame 57, so that the driven roller 54 is always located in the space between the two rollers 28. This ensures that the driven roller 54 can lift the metal pipe upwards when the rollers 28 are at different spacings.

[0056] To further explain, each roller conveyor is equipped with an independent lifting frame 57 and a motor for driving the rotating shaft 26. When the previous batch of metal pipes has entered the downstream roller conveyor in the conveying direction, and the next batch of metal pipes is still in the upstream roller conveyor in the conveying direction, the lifting components of the upstream roller conveyor can be controlled separately to lift and temporarily store the next batch of metal pipes.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A graded feeding device for heat treatment of metal tubing for apartment beds, comprising a feeding frame (1), characterized in that, An adjustment component is provided on the feed frame (1); The adjustment assembly includes two adjustment frames (21) fixedly connected to the top of the feed frame (1). Multiple adjustment slots (22) are provided in the inner cavity of each adjustment frame (21). Two adjustment brackets (23) are provided inside each adjustment frame (21). Two adjustment brackets (23) within the same adjustment frame (21) form a group. Multiple driven plates (24) are slidably connected to the inner side of each adjustment bracket (23). Bearings (25) are fixedly connected to each adjustment bracket (23) and multiple driven plates (24). A rotating shaft (26) is rotatably connected inside each bearing (25). A sprocket (27) is fixedly connected to each rotating shaft (26). A roller (28) is fixedly connected between every two opposing sprockets (27). Multiple sprockets (27) on one side of the same adjustment frame (21) are connected to a chain (29) for transmission. Two chains (29) are provided for the two adjustment frames (21). Two buffer grooves (210) are opened on the inner side of the feed frame (1). A counterweight plate (211) is slidably connected to the inner side of the two buffer grooves (210). Both ends of the counterweight plate (211) are rotatably connected to sprockets (212). The bottom of the chain (29) is respectively connected to the two sprockets (212). A first cross linkage group (213) is rotatably connected to the side of multiple rotating shafts (26) away from the sprockets (27). An assembly component is provided on the adjustment frame (23). A locking component is provided on the first cross linkage group (213). The locking assembly includes two mounting sleeves (41) that are rotatably connected to the middle hinge position of the two scissor arms in the first cross linkage group (213). There are two mounting sleeves (41), and fastening plates (42) are fixedly connected to both mounting sleeves (41) by bolts. A limiting groove ring (43) is fixedly connected to one of the fastening plates (42). A threaded rod (44) is rotatably connected to the fastening plate (42) that is fixedly connected to the limiting groove ring (43). A knob sleeve (45) is horizontally slidably connected to one end of the threaded rod (44) near the limiting groove ring (43). A spring (46) is fixedly connected between the knob sleeve (45) and the threaded rod (44). A limiting rod (47) is fixedly connected to one side of the knob sleeve (45) near the limiting groove ring (43). A lifting assembly is provided on the roller (28).

2. The graded feeding device for heat treatment of metal tubing for apartment beds according to claim 1, characterized in that, The cross-sectional shape of the adjustment groove (22) is T-shaped. The adjustment frame (23) includes a vertical plate and two T-shaped guide rods fixedly connected to the inner side of the vertical plate. The upper and lower ends of the vertical plate are respectively provided with T-shaped sliding parts that are adapted to the adjustment groove (22). The T-shaped sliding parts are slidably connected to the corresponding adjustment groove (22). The upper and lower ends of each driven plate (24) are provided with Y-shaped sliding parts that are adapted to the T-shaped guide rods. The driven plate (24) is slidably connected to the two T-shaped guide rods through the Y-shaped sliding parts. One of the rotating shafts (26) is driven by a motor. The first cross linkage group (213) includes The system includes multiple scissor lifts arranged sequentially along the length of the feed frame (1). Each scissor lift includes two intersecting first links. The middle parts of the two first links are hinged to each other, and the ends of the first links corresponding to two adjacent scissor lifts are hinged to each other to form a continuous scissor-type linkage structure that can extend and retract along the length of the feed frame (1). Multiple rotating shafts (26) are rotatably connected to the corresponding hinged positions of the first intersecting linkage group (213), so that when the first intersecting linkage group (213) extends and retracts, it can drive the multiple rotating shafts (26) to move synchronously and equidistantly along the length of the feed frame (1).

3. The graded feeding device for heat treatment of metal tubing for apartment beds according to claim 1, characterized in that, The assembly includes a fixing block 1 (31) fixedly connected to one of the adjustment frames (23) in the same group, with two slots (32) on the fixing block 1 (31). A fixing block 2 (33) is fixedly connected to another adjustment frame (23) in the same group, with a movable groove (34) on the fixing block 2 (33). Two locking blocks (35) are slidably connected inside the movable groove (34). Two springs 1 (36) are fixedly connected to the inner cavity of the movable groove (34). The ends of the two springs 1 (36) away from the movable groove (34) are fixedly connected to the two locking blocks (35) respectively.

4. The graded feeding device for heat treatment of metal tubing for apartment beds according to claim 3, characterized in that, The two slots (32) are formed by combining a small rectangular slot and a large rectangular slot into an L shape. The two blocks (35) extend outward through the movable slot (34). A triangular block is fixedly connected to one end of each block (35) located outside the movable slot (34). A protruding rod is fixedly connected to the same side of each block (35). The protruding rods of each block (35) extend outward to the outside of the movable slot (34).

5. The graded feeding device for heat treatment of metal tubing for apartment beds according to claim 1, characterized in that, A threaded hole is provided on the fastening plate (42) that is not fixedly connected to the limiting groove ring (43). The end of the threaded rod (44) away from the knob sleeve (45) is threadedly connected to the threaded hole of the fastening plate (42). Multiple circular grooves are provided on the outer edge of the limiting groove ring (43). The limiting rod (47) is stuck in the circular groove of the limiting groove ring (43). A parallel groove is provided on the end of the threaded rod (44) near the knob sleeve (45). A slider is fixedly connected inside the knob sleeve (45). The slider of the knob sleeve (45) slides in the parallel groove of the threaded rod (44).

6. The graded feeding device for heat treatment of metal tubing for apartment beds according to claim 1, characterized in that, The lifting assembly includes multiple sets of second cross linkage groups (51) arranged sequentially along the length of the feed frame (1). The second cross linkage group (51) includes multiple scissor groups arranged continuously. Each scissor group includes two intersecting second links. The middle of the two second links is hinged to each other. The ends of the corresponding second links of two adjacent scissor groups are hinged to each other. Linkage rods (52) are provided at the corresponding hinge positions of the multiple scissor groups. The upper hinge ends of the multiple scissor groups are movably connected to multiple rollers (28). Linkage frames (53) are vertically slidably connected to the multiple linkage rods (52). Driven rollers (54) are rotatably connected to the top of the multiple linkage frames (53). Multiple electric telescopic rods (55) are fixedly connected to the inner side of the feed frame (1). Connecting rods (56) are fixedly connected to the telescopic shafts of the multiple electric telescopic rods (55). Lifting frames (57) are fixedly connected to the bottom of the multiple connecting rods (56).

7. The graded feeding device for heat treatment of metal tubing for apartment beds according to claim 6, characterized in that, Multiple driven rollers (54) are located between each pair of rollers (28), and the diameter of the driven rollers (54) is smaller than the distance between the two rollers (28). The bottoms of multiple linkage frames (53) slide on the lifting frame (57).

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