Stokehole automatic feeding device for roller type large steel cylinder heat treatment production line

Abstract

The invention relates to the technical field of mechanical automatic feeding, in particular to an automatic stokehole feeding device for a roller type large steel cylinder heat treatment production line. A roller type large steel cylinder heat treatment production line stokehole automatic feeding device comprises a feeding structure, a pre-feeding structure and a feeding structure, the feeding structure conveys large steel cylinders to the pre-feeding structure, the pre-feeding structure conveys the large steel cylinders to the feeding structure one by one, and the roller type large steel cylinder heat treatment production line stokehole automatic feeding device further comprises an overturning piece, the feeding structure comprises at least two V-shaped roller sets, the overturning piece is used for overturning the large steel cylinders on the V-shaped roller sets close to the feeding structure to the V-shaped roller sets close to the adjacent V-shaped roller sets, and the V-shaped roller sets rotate synchronously to be used for conveying the large steel cylinders into a heat treatment furnace. The large steel cylinder carrying device has the following beneficial effects that the falling probability of large steel cylinders in the carrying process is reduced, the life safety of operators is guaranteed, meanwhile, the production efficiency is improved, manpower and time cost is saved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of automated mechanical feeding, and in particular to an automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line. Background Technology

[0002] In the large steel cylinder manufacturing industry, heat treatment is a key process that plays a vital role in ensuring the quality and performance of large steel cylinders. With the continuous development of the manufacturing industry, improving the efficiency and quality of large steel cylinder heat treatment production lines has become a goal pursued by enterprises.

[0003] A highly efficient and stable heat treatment production line can significantly improve the quality of large steel cylinders, enabling them to better meet the needs of various industrial applications and thus enhance the competitiveness of enterprises in the market. At the same time, advanced heat treatment technology and equipment also help reduce energy consumption and environmental impact, which is in line with the concept of sustainable development.

[0004] Currently, to address the issue of loading large steel cylinders for heat treatment, domestic manufacturers generally employ a manual method using cranes and magnetic suction to load the cylinders. Workers must control the crane's movement, precisely adjusting the position of the magnetic suction device to accurately attach the cylinder, and then lift it into the heat treatment furnace. Throughout the entire process, workers must constantly monitor the crane's operation and the magnetic suction device's attachment status to ensure the cylinder is accurately placed in the designated location.

[0005] However, due to the large weight of the cylinders, they may fall if the magnetic attraction is not secure, which could seriously endanger the lives of the operators. This method of handling cylinders individually is extremely inefficient and requires a large investment of manpower and time, resulting in a significant increase in production costs. Summary of the Invention

[0006] In order to reduce the probability of large steel cylinders falling during handling, ensure the safety of operators, improve production efficiency, save manpower and time costs, and reduce production costs, this application provides an automatic feeding device in front of the furnace for a roller-type large steel cylinder heat treatment production line.

[0007] This application provides an automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line, which adopts the following technical solution: it includes a feeding structure, a pre-feeding structure, and a feeding structure. The feeding structure conveys the large steel cylinders to the pre-feeding structure, and the pre-feeding structure conveys the large steel cylinders one by one to the feeding structure. It also includes a turning component. The feeding structure includes at least two sets of V-shaped rollers. The turning component is used to turn the large steel cylinders on the V-shaped rollers near the feeding structure to the adjacent V-shaped rollers. Multiple sets of V-shaped rollers rotate synchronously to send the large steel cylinders into the heat treatment furnace.

[0008] By adopting the above technical solution, the feeding structure delivers the large steel cylinders to the pre-feeding structure. The pre-feeding structure and the turning component work together to deliver the large steel cylinders one by one to the V-shaped roller group. Multiple V-shaped roller groups rotate synchronously to deliver the large steel cylinders into the heat treatment furnace, realizing automatic feeding of large steel cylinders, reducing the probability of large steel cylinders falling during handling, ensuring the safety of operators, improving production efficiency, saving manpower and time costs, and reducing production costs.

[0009] Preferably, each group of V-shaped rollers includes multiple V-shaped rollers, and the feeding structure also includes a feeding frame. The multiple V-shaped rollers are equally spaced along the axial direction of the large steel cylinder on the feeding frame, and the multiple V-shaped roller groups rotate synchronously.

[0010] By adopting the above technical solution, multiple V-shaped rollers rotate synchronously to send large steel cylinders into the heat treatment furnace. This synchronously rotating V-shaped roller design can stably carry and transport large steel cylinders.

[0011] Preferably, the flipping component includes a rotating plate and a flipping drive component. One end of the rotating plate is hinged to the feeding frame, and the other end of the rotating plate is driven to rotate by the flipping drive component. The rotating end of the rotating plate is located below the large steel cylinder, and the rotating plate applies force to the large steel cylinder when it rotates.

[0012] By adopting the above technical solution, the large steel cylinder is transferred between multiple sets of V-shaped rollers using a flipping component. Then, the large steel cylinder is pushed into the heat treatment furnace by the rotation of the V-shaped rollers. The whole process is highly automated, avoiding frequent manual operation and greatly reducing the labor intensity of workers.

[0013] Preferably, multiple rotating plates are provided, and the multiple rotating plates are equally spaced along the axial direction of the large steel cylinder on the frame and are alternately spaced with the V-shaped rollers.

[0014] By adopting the above technical solution, multiple rotating plates are evenly spaced along the axial direction of the large steel cylinder placed on the front conveyor frame, and multiple rotating plates and multiple V-shaped rollers are alternately arranged in sequence. This arrangement can apply a more uniform turning force to the large steel cylinder, allowing the large steel cylinder to smoothly flip from one V-shaped roller to another.

[0015] Preferably, the pre-feeding structure includes a front conveyor frame and a stop block. The front conveyor frame is disposed between the feeding structure and the feeding structure, and the upper surface of the front conveyor frame is used for placing large steel cylinders. The stop block is rotatably connected to the front conveyor frame. The stop block is driven by a driving component to be in an upright state that blocks the sliding of the large steel cylinder or in a lowered state that releases the sliding of the large steel cylinder.

[0016] By adopting the above technical solution, when the stop block is in the upright state, it can prevent the large steel cylinder from sliding; when the stop block is rotated and lowered, the large steel cylinder can smoothly slide towards the supporting component.

[0017] Preferably, the upper surface of the front conveyor is inclined downward along the side closer to the feeding structure towards the side closer to the feeding structure.

[0018] By adopting the above technical solution, the upper surface of the front conveyor is inclined to facilitate the large steel cylinders to slide towards the feeding structure of the bearing component by their own weight.

[0019] Preferably, a positioning collar is provided at one end of the feeding frame near the heat treatment furnace. The positioning collar is correspondingly provided with the V-shaped roller group. The positioning collar and the large steel cylinder placed on the V-shaped roller group are coaxially provided and are used for the large steel cylinder to pass through.

[0020] By adopting the above technical solution, during the process of the large steel cylinder entering the heat treatment furnace, the large steel cylinder may experience radial relative displacement. The positioning collar is fitted onto the large steel cylinder, which to a certain extent restricts the radial movement of the large steel cylinder.

[0021] Preferably, the bottom of the feeding frame is provided with a frame drive component and wheels. One end of the frame drive component is connected to the feeding frame, and the other end of the frame drive component is fixed to the ground. The frame drive component is used to drive the frame to move closer to or away from the heat treatment furnace via the wheels.

[0022] By adopting the above technical solution, when the door of the heat treatment furnace is opened or closed, the frame will interfere with the opening of the door, and the frame drive will drive the frame away from the heat treatment furnace. When a large steel cylinder is sent into the heat treatment furnace, the frame will be driven closer to the heat treatment furnace.

[0023] Preferably, the adjustable positioning collar includes a fixed half-ring and a movable half-ring, wherein the fixed half-ring can be radially positioned to reciprocate closer to or further away from the fixed half-ring.

[0024] By adopting the above technical solution, it can be adapted to large steel cylinders of different diameters.

[0025] Preferably, the feeding structure includes a feeding slide table, which slides back and forth in a vertical direction. The feeding slide table is used to carry large steel cylinders and slides to be flush with one end of the front conveyor frame. A feeding auxiliary pusher is provided on the feeding slide table, which is used to drive the large steel cylinders on the feeding slide table onto the front conveyor frame.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Enables automatic feeding of large steel cylinders, reducing the probability of cylinders falling during handling, ensuring the safety of operators, improving production efficiency, saving labor and time costs, and reducing production costs; 2. The large steel cylinder is transferred between multiple sets of V-shaped rollers by a flipping device, and then pushed into the heat treatment furnace by the rotation of the V-shaped rollers. The whole process is highly automated, avoiding frequent manual operation and greatly reducing the labor intensity of workers. Attached Figure Description

[0027] Figure 1 This is a front view schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a side view of a portion of the structure of Embodiment 1 of this application; Figure 3 This is a front view schematic diagram of a portion of the structure of Embodiment 1 of this application; Figure 4 This is a cross-sectional schematic diagram of the feeding structure of Embodiment 1 of this application; Figure 5 This is a top view of a portion of the structure of Embodiment 1 of this application; Figure 6 This is a schematic diagram of a portion of the structure of Embodiment 2 of this application; Figure 7 This is a side view of a portion of the structure of Embodiment 2 of this application; Figure 8 This is a top view of a portion of the structure of Embodiment 2 of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Large steel cylinder; 2. Heat treatment furnace; 110. Feeding structure; 111. Feeding sliding table; 112. Enclosure; 113. Partition; 114. Hydraulic lifting cylinder; 115. Feeding auxiliary pusher; 116. Feeding auxiliary pusher plate; 117. Hydraulic cylinder; 120. Pre-feeding structure; 121. Front conveyor frame; 122. Stop block; 123. Rubber block; 124. Rotating shaft; 140. Tilting component; 141. Rotary... Plate; 142, Cylinder No. 1; 150, V-shaped roller; 151, Drive roller; 152, Reducer; 153, Transmission rod; 154, Sprocket; 155, Feeding frame; 156, Cylinder No. 2; 157, Wheel; 160, Adjustable positioning collar; 161, Fixed half-ring; 162, Moving half-ring; 163, Screw and nut mechanism; 164, Collar bracket; 170, Blocking component; 6, Positioning collar; 61, Collar frame. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses an automatic feeding device in front of the furnace for a roller-type large steel cylinder heat treatment production line, which is used to reduce the probability of large steel cylinders falling during handling, ensure the safety of operators, improve production efficiency, save manpower and time costs, and reduce production costs.

[0031] Example 1 refer to Figure 1 , Figure 2 and Figure 3 An automatic feeding device for a roller-type large steel cylinder heat treatment production line includes a feeding structure 110, a pre-feeding structure 120, a feeding structure, and a turning component 140. The feeding structure 110 conveys the large steel cylinders 1 onto the pre-feeding structure 120, which then conveys the large steel cylinders 1 one by one onto the feeding structure. The feeding structure includes at least two sets of V-shaped rollers. The turning component 140 flips the large steel cylinders 1 on the V-shaped rollers closest to the feeding structure 110 onto another set of V-shaped rollers. Finally, the feeding structure delivers the large steel cylinders 1 into the heat treatment furnace 2. This structural arrangement enables automated feeding of the large steel cylinders 1, avoiding the dangers of manual magnetic lifting, ensuring operator safety, improving production efficiency, saving labor and time costs, and reducing production costs.

[0032] For details, please refer to Figure 1 and Figure 4 The feeding structure 110 includes a feeding slide table 111, which is used to support the large steel cylinder 1 and can slide to be flush with one end of the front conveyor frame 121. The feeding slide table 111 is a flat plate structure, and its material can be high-strength steel to ensure that it can bear the weight of the large steel cylinder 1. The two sides of the long side of the feeding slide table 111 are provided with side panels 112. The side of the feeding slide table 111 near the pre-feeding structure 120 is provided with a damped rotatable partition 113. The feeding slide table 111 is vertically... The linear reciprocating sliding is achieved by a hydraulic lifting cylinder 114. The feeding slide table 111 is equipped with a feeding auxiliary pusher 115, which consists of a feeding auxiliary pusher plate 116 and two small hydraulic cylinders 117. The feeding auxiliary pusher plate 116 is flush with the horizontal plane of the feeding slide table 111, and the hydraulic cylinders 117 are vertically arranged below the feeding auxiliary pusher plate 116. When the feeding slide table 111 is flush with the front conveyor frame 121, the hydraulic cylinders 117 are activated, pushing the large steel cylinder 1 onto the pre-feeding structure 120.

[0033] refer to Figure 1 and Figure 3The pre-feeding structure 120 includes a front conveyor frame 121 and a stop block 122. The front conveyor frame 121 is located between the feeding structure 110 and the feeding structure. The upper surface of the front conveyor frame 121 is used for placing the large steel cylinder 1. The front conveyor frame 121 adopts a steel structure frame. The structural feature of the front conveyor frame 121 is that the upper surface is inclined downward along the side closer to the feeding structure 110 towards the side closer to the feeding structure. This inclined design can use the weight of the large steel cylinder 1 itself to make the large steel cylinder 1 slide towards the feeding structure.

[0034] The stop block 122 is rotatably connected to the front conveyor frame 121. The stop block 122 can be composed of a rubber block 123 and a rotating shaft 124, and the rotatable connection is achieved through a drive motor cooperating with the rotating shaft 124. When the stop block 122 is in the upright position, it can prevent the large steel cylinder 1 from sliding; when the stop block 122 is rotated down, the large steel cylinder 1 can smoothly slide towards the feeding structure. The drive motor and the rotating shaft 124 of the stop block 122 are connected by a coupling to ensure power transmission.

[0035] refer to Figure 2 , Figure 3 and Figure 5 Each V-roller group in the feeding structure includes multiple V-rollers 150. The feeding structure also includes a feeding frame 155. The multiple V-rollers 150 are evenly spaced along the axial direction of the large steel cylinder 1 on the feeding frame 155. The V-rollers 150 are typically made of stainless steel with a polished surface to reduce friction with the large steel cylinder 1. The V-rollers 150 are mounted on the feeding frame 155 via bearings, and the multiple V-roller groups rotate synchronously. The feeding frame 155 provides support for the entire feeding structure, possessing high strength and stability. The synchronous rotation of the V-roller groups can be achieved through chain drive, i.e., multiple V-roller groups are connected by a sprocket 154 and a chain, and driven by the same motor.

[0036] In this embodiment, the feeding frame 155 is equipped with a drive roller 151, a reducer 152, a transmission roller 153, and a sprocket 154. A V-shaped roller 150 is mounted and fixed on the transmission roller 153, and the sprocket 154 is fixed on the transmission roller 153. The installed transmission roller 153 is mounted on the feeding frame 155, and the sprocket 154 is fixed on the drive roller 151. The V-shaped roller 150 is mounted and fixed on the drive roller 151. The rod 151 is installed on the feeding frame 155, the reducer 152 is installed on one end of the drive roller 151 and fixed on the feeding frame 155, multiple sets of transmission rollers 153 are connected to the drive roller 151 by chains, two sets of V-shaped rollers are provided, the two sets of V-shaped rollers are spaced apart along the axial direction of the transmission roller 153, and multiple V-shaped rollers 150 of each set of V-shaped rollers are spaced equally along the horizontal direction and the radial direction of the transmission roller 153 on the feeding frame 155.

[0037] refer to Figure 1 The flipping component 140 includes a rotating plate 141 and a flipping drive component. One end of the rotating plate 141 is hinged to the feeding frame 155, typically using a pin for hinge to facilitate rotation. The other end of the rotating plate 141 is driven to rotate by the flipping drive component. The rotating end of the rotating plate 141 is located below the large steel cylinder 1, and the rotating plate 141 applies force to the large steel cylinder 1 when it rotates. In this embodiment, the flipping drive component is a first cylinder 142. One end of the first cylinder 142 is fixedly mounted on the feeding frame 155, and the piston rod of the first cylinder 142 is connected to the rotating plate 141. When the piston rod of the first cylinder 142 extends or retracts, it drives the rotating plate 141 to rotate, thereby achieving the flipping of the large steel cylinder 1. Multiple rotating plates 141 are provided, and the multiple rotating plates 141 are equally spaced along the axial direction of the large steel cylinder 1 on the feeding frame 155 and alternately spaced with the V-shaped rollers 150. This setup allows for a more even application of the overturning force to the large steel cylinder 1, enabling it to smoothly flip from one V-shaped roller group to another.

[0038] refer to Figure 2 , Figure 3 and Figure 5 When the large steel cylinder 1 moves toward the heat treatment furnace 2 under the drive of the V-shaped rollers, the large steel cylinder 1 may experience radial relative displacement. A positioning collar 6 is also provided at one end of the feeding frame 155 near the heat treatment furnace 2. The positioning collar 6 is correspondingly set with the bearing component. The positioning collar 6 and the large steel cylinder 1 placed on the bearing component are coaxially set and used for the large steel cylinder 1 to pass through. In this embodiment, a total of two positioning collars 6 are provided. The two positioning collars 6 correspond one-to-one with the two sets of V-shaped rollers. The two sides of the positioning collar 6 are also provided with collar frames 61 for connecting with the feeding frame 155. During the process of the feeding structure pushing the large steel cylinder 1 into the heat treatment furnace 2, the positioning collar 6 is fitted onto the large steel cylinder 1, which to a certain extent restricts the radial movement of the large steel cylinder 1.

[0039] Further, refer to Figure 2 , Figure 3 The feeding frame 155 is also equipped with a blocking component 170. The blocking component 170 is fixed at the end of the feeding frame 155 to block the tail of the large steel cylinder 1. The blocking component 170 is a metal baffle perpendicular to the feeding frame 155 and is fixed to the feeding frame 155 by bolts. When the large steel cylinder 1 moves backward under the drive of the V-shaped roller 150, the blocking component 170 can align the large steel cylinder 1 to meet the cycle of entering the heat treatment furnace 2.

[0040] The bottom of the feeding frame 155 is equipped with a frame drive component and casters 157. One end of the frame drive component is connected to the feeding frame 155, and the other end is fixed to the ground. In this embodiment, the frame drive component is a second cylinder 156. One end of the second cylinder 156 is mounted and fixed on the feeding frame 155, and the other end is mounted and fixed to the ground. The feeding frame 155 moves via the casters 157 by the extension and retraction of the piston rod of the second cylinder 156. The casters 157 are generally swivel casters and are equipped with brakes to facilitate the movement and positioning of the feeding frame 155. The four casters 157 are arranged in a rectangle at the bottom of the feeding frame 155 to ensure the stability of the movement of the feeding frame 155.

[0041] Example 2 refer to Figure 6 , Figure 7 and Figure 8 The difference from Embodiment 1 is that it includes an adjustable positioning collar 160. The adjustable positioning collar 160 is disposed at one end of the feeding frame 155 near the heat treatment furnace 2 and is correspondingly disposed with respect to the V-shaped roller group. The adjustable positioning collar 160 is coaxially disposed with the large steel cylinder 1 and allows the large steel cylinder 1 to pass through. The adjustable positioning collar 160 includes a fixed half-ring 161 and a movable half-ring 162. The fixed half-ring 161 is fixed on the feeding frame 155, and the movable half-ring 162 can be radially positioned and reciprocated to move closer to or away from the fixed half-ring 161. The sliding of the movable half-ring 162 is achieved through the screw and nut mechanism 163. The screw is driven to rotate by a motor, thereby driving the nut and the movable half-ring 162 to move. The adjustable positioning collar 160 is also provided with collar brackets 164 on both sides for connecting with the feeding frame 155. During the process of the feeding structure pushing the large steel cylinder 1 into the heat treatment furnace 2, the adjustable positioning collar 160 is fitted onto the large steel cylinder 1, which to a certain extent restricts the radial movement of the large steel cylinder 1 and ensures that the large steel cylinder 1 can accurately enter the heat treatment furnace 2.

[0042] The implementation principle of Embodiment 2 of this application is as follows: During production, two sets of large steel cylinders are produced together in the heat treatment furnace 2. It is necessary to control the two large steel cylinders 1 to enter the heat treatment furnace 2 together. When the feeding slide table 111 is level with the front conveyor frame 121, the hydraulic cylinder 117 is activated, pushing the large steel cylinder 1 to the front conveyor frame 121. The inclined design of the front conveyor frame 121 can use the weight of the large steel cylinder 1 to make the large steel cylinder 1 slide towards the feeding structure. When the stop block 122 is rotated and lowered, the large steel cylinder 1 can smoothly slide towards the feeding structure. When the piston rod of the first cylinder 142 extends or retracts, it drives the rotating plate 141 to rotate, thereby realizing the flipping of the large steel cylinder 1 on the two sets of V-shaped rollers. The two V-shaped rollers 150 are in the same position as the V-shaped rollers 150 in the heat treatment furnace 2. At this time, the reducer 152 rotates in the opposite direction to drive The drive roller 151 rotates, which in turn drives multiple sets of transmission rollers 153 to rotate via a chain. This causes the large steel cylinder 1 to move backward and collide with the baffle, aligning it and ensuring it is ready to enter the heat treatment furnace 2. The furnace 2 door opens, and the piston rod of the second cylinder 156 extends, causing the feeding frame 155 to move to a position close to the furnace 2 via the wheels 157. The reducer 152 rotates forward, driving the large steel cylinder 1 into the furnace 2. After the conveying process is completed, the piston rod of the second cylinder 156 retracts, causing the feeding frame 155 to return via the wheels 157. This cycle repeats continuously according to the rhythm, completing the feeding and conveying process automatically, reducing the probability of the large steel cylinder 1 falling during handling, ensuring the safety of operators, improving production efficiency, saving manpower and time costs, and reducing production costs.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line, characterized in that: The system includes a feeding structure (110), a pre-feeding structure (120), and a feeding structure. The feeding structure (110) transports large steel cylinders (1) to the pre-feeding structure (120), and the pre-feeding structure (120) transports large steel cylinders (1) one by one to the feeding structure. The system also includes a flipping component (140). The feeding structure includes at least two sets of V-shaped rollers. The flipping component (140) is used to flip the large steel cylinders (1) on the V-shaped rollers near the feeding structure (110) and send them into the heat treatment furnace (2).

2. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 1, characterized in that: Each V-roller group includes multiple V-rollers (150), and the feeding structure also includes a feeding frame (155). The multiple V-rollers (150) are equally spaced on the feeding frame (155) along the axial direction of the large steel cylinder (1), and the multiple V-roller groups rotate synchronously.

3. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 1, characterized in that: The flipping component (140) includes a rotating plate (141) and a flipping drive component. One end of the rotating plate (141) is hinged to the feeding frame (155), and the other end of the rotating plate (141) is driven to rotate by the flipping drive component. The rotating end of the rotating plate (141) is located below the large steel cylinder (1), and the rotating plate (141) applies force to the large steel cylinder (1) when it rotates.

4. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 3, characterized in that: Multiple rotating plates (141) are provided, and the multiple rotating plates (141) are equally spaced along the axial direction of the large steel cylinder (1) on the frame and are alternately spaced with the V-shaped roller (150).

5. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 1, characterized in that: The pre-feeding structure (120) includes a front conveyor frame (121) and a stop block (122). The front conveyor frame (121) is disposed between the feeding structure (110) and the feeding structure, and the upper surface of the front conveyor frame (121) is used for placing the large steel cylinder (1). The stop block (122) is rotatably connected to the front conveyor frame (121). The stop block (122) is driven by a driving member to be in an upright state that blocks the sliding of the large steel cylinder (1) or in a lowered state that releases the sliding of the large steel cylinder (1).

6. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 5, characterized in that: The upper surface of the front conveyor (121) is inclined downward along the side closer to the feeding structure (110) towards the side closer to the feeding structure.

7. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 2, characterized in that: The feeding frame (155) is also provided with a positioning collar (6) at one end near the heat treatment furnace (2). The positioning collar (6) is provided in correspondence with the V-shaped roller group. The positioning collar (6) and the large steel cylinder (1) placed on the V-shaped roller group are coaxially arranged and used for the large steel cylinder (1) to pass through.

8. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 7, characterized in that: The bottom of the feeding frame (155) is provided with a frame drive and a wheel (157). One end of the frame drive is connected to the feeding frame (155), and the other end of the frame drive is fixed to the ground. The frame drive is used to drive the frame to move closer to or away from the heat treatment furnace (2) via the wheel (157).

9. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 7, characterized in that: The adjustable positioning collar (160) includes a fixed half-ring (161) and a movable half-ring (162). The fixed half-ring (161) can be radially positioned and reciprocated to move closer to or away from the fixed half-ring (161).

10. The automatic feeding device for the furnace front of a roller-type large steel cylinder heat treatment production line according to claim 5, characterized in that: The feeding structure (110) includes a feeding slide table (111), which slides back and forth in the vertical direction. The feeding slide table (111) is used to carry the large steel cylinder (1) and slide to be flush with one end of the front conveyor frame (121). A feeding auxiliary pusher (115) is provided on the feeding slide table (111), which is used to drive the large steel cylinder (1) on the feeding slide table (111) to the front conveyor frame (121).

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