Anti-steel coil uncoiling and falling uncoiling trolley

Abstract

The utility model relates to an uncoiling trolley of preventing steel coil from uncoiling and falling, belong to steel coil uncoiling technical field. Including trolley body and pressure belt device. Pressure belt device is installed on the trolley frame, is close to the side of bundling saddle. Pressure belt device includes pressure belt device frame, pressure cylinder, driving link, swing link, connecting rod, pressure bar and the lifting cylinder of pressure belt device. The frame is installed on the frame, and the sliding guide plate is arranged between the two; pressure cylinder is installed on the frame, and the piston rod of pressure cylinder is connected with driving link screw, and the frame, driving link, swing link, connecting rod and pressure bar adopt pin shaft connection; the lifting cylinder piston rod end of pressure belt device frame pin shaft connection, the other end is connected with trolley frame, and the lifting cylinder of pressure belt device drives pressure belt device vertical lifting. The utility model can effectively prevent steel coil from uncoiling and falling, satisfy various size, the uncoiling of steel coil, coiler, simple structure, low installation space requirement, do not need additional running mechanism, and the operation control is simple.

Description

Technical Field

[0001] This utility model belongs to the field of steel coil unwinding technology, and relates to an unwinding trolley that prevents steel coils from loosening or falling off. Background Technology

[0002] With the accelerated pace of global industrialization, the demand for high-strength steel products in sectors such as petrochemical pipelines, engineering machinery, construction and bridges, and marine equipment has experienced explosive growth. This shift in demand directly drives continuous innovation in strip steel production processes, with production directions expanding towards higher strength and thicker specifications. High-strength steel, with its superior tensile strength, plays an irreplaceable structural support role in many critical areas. However, when the strength and thickness of steel plates exceed certain critical values, a series of production challenges emerge.

[0003] In the critical stage of steel coil forming, the release of elastic potential energy caused by the high strength of the material is particularly prominent when the coil is unwound from the coiler drum. At this time, the stress distribution inside the steel coil changes drastically, and the friction between the strip layers is insufficient to effectively constrain elastic deformation, easily leading to loosening of the coil. Especially during the operation of the unwinding trolley, the tail end of the strip will experience violent rebound due to the lack of effective constraint, and the rebound force increases geometrically with the strength and thickness of the steel plate. This dynamic impact not only threatens the safe operation of the equipment but may also cause coil decoupling accidents, posing a serious safety hazard to on-site operators. Especially in the production scenario of small-coil heavy steel coils, due to the relatively small diameter of the steel coil and the limited contact area between the coiling layers, the difficulty of preventing loosening increases exponentially, becoming a key bottleneck restricting the improvement of production efficiency.

[0004] The aforementioned technical challenges are prevalent in both hot-rolled coilers and downstream finishing line coilers. Currently, the industry primarily employs two solutions: The first is to produce only large, heavy steel coils, utilizing the static friction generated by the coil's own weight to constrain tail displacement. However, this "using weight to control loosening" approach significantly reduces production flexibility, failing to meet the market's differentiated demands for multi-specification products, and increases raw material inventory costs and energy consumption. The second solution involves constructing a physical protection system by adding anti-loosening and anti-decoupling devices, with coil pressing technology implemented through two paths: pressing the outer diameter and pressing the inner diameter.

[0005] The outer diameter pressing solution requires a liftable pressure roller around the outer circumference of the steel coil to maintain coil tightness through mechanical pressure; the inner diameter pressing solution uses a central expansion clamping mechanism to provide support from within the coil core. Both technologies can be used independently or in combination, but both face common technical challenges: firstly, an independent traveling mechanism is needed to ensure synchronized operation with the unloading trolley; secondly, a complex pressure control system must be developed to monitor and adjust clamping force parameters in real time; and thirdly, stringent requirements are placed on equipment installation space, often necessitating large-scale civil engineering work in the retrofitting of existing production lines. Particularly in hot-rolled underground coiling machine applications, the outer diameter pressing device cannot be installed because the steel coil is completely enclosed by the coiling machine frame, rendering this technology completely ineffective on such equipment. These technical deficiencies directly increase equipment investment costs and severely restrict the promotion and application of new technologies. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a coil unloading trolley that prevents steel coils from loosening or falling off. It effectively prevents steel coils from loosening or falling off through a convenient unloading method, meets the unloading needs of steel coils of various specifications, and does not require an additional traveling mechanism.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A coil unloading trolley for preventing steel coils from loosening or falling off includes a frame and a pressing device disposed on one side of the frame; the bottom of the pressing device is connected to the frame via a first lifting cylinder; and the top of the frame is provided with rollers for supporting the steel coil.

[0009] The pressing device includes a frame slidably disposed on one side of the vehicle frame. The frame is provided with a movable pressing unit. The pressing unit includes a pressing rod disposed at one end away from the frame. The pressing rod extends into the inner diameter of the steel coil and presses the steel coil from the inside onto the idler roller to prevent the steel coil from loosening or falling off.

[0010] One end of the pressure bar is a free end, and the free end faces the inner diameter of the steel coil.

[0011] Optionally, the clamping unit further includes a retractable clamping cylinder mounted on the frame, wherein the end of the clamping cylinder away from the frame is connected to the pressure rod in sequence via an active rod and a first connecting rod;

[0012] The end of the active rod away from the first connecting rod is also connected to a second connecting rod. The second connecting rod is connected to the swing rod. One end of the swing rod is connected to the frame, and the other end is connected to the pressure rod.

[0013] The clamping cylinder and the driving rod are connected by a thread. The driving rod, the first connecting rod, the second connecting rod, the pressure rod, the swing rod, and the frame are rotatably connected to each other so that the pressure rod can move on the frame.

[0014] Optionally, the pressure bar is provided with a pressure head, which is used to press the steel coil onto the idler roller.

[0015] Optionally, the pressure head has a spherical structure.

[0016] Optionally, the frame is provided with a sliding guide plate on the side near the vehicle frame, and guide rods are symmetrically arranged on both sides of the clamping cylinder. The guide rods cooperate with the sliding guide plate and the clamping cylinder to realize the lifting and sliding of the frame on the vehicle frame.

[0017] Optionally, the active rod, first connecting rod, second connecting rod, pressure rod, swing rod, and frame are rotatably connected by pins.

[0018] Optionally, the bottom of the idler roller is connected to the frame via a second lifting cylinder, and the idler roller moves up and down on the frame as the second lifting cylinder moves up and down.

[0019] Optionally, the bottom of the frame is provided with a traveling device to allow the unloading trolley to move flexibly.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model is developed based on the existing unwinding trolley structure, which can effectively prevent steel coils from loosening or falling off. Compared with the prior art, it has a simple structure and low installation space requirements; and it does not require an additional traveling mechanism, making operation and control simple. It can meet the unwinding requirements of steel coils of various specifications and sizes, and is suitable for unwinding various coiling machines.

[0022] This invention, by setting a pressure device on the frame of the unloading trolley, maintains pressure between the inner diameter of the steel coil and the trolley rollers, and between the inner diameter of the steel coil and the bundling saddle, from before the steel coil completely leaves the drum until after the steel coil is circumferentially bundled. This effectively prevents loosening caused by displacement of the core of the steel coil and falling off caused by bending elasticity of the tail of the steel coil.

[0023] The pressing device of this utility model includes a rotatable active rod, a swing rod, a connecting rod, and a pressing rod. Through the lifting cylinder and pressing cylinder set at its bottom, the pressing device can be flexibly lifted and rotated on the unloading trolley frame, so that the pressing head on the pressing rod can smoothly enter the inner diameter of the steel coil and press the steel coil.

[0024] The pressure head on the pressure rod of this utility model is set as a spherical pressure head. On the one hand, the outer surface of the spherical structure can fit with the inner arc surface of the steel coil, and on the other hand, it can also avoid scratching the steel coil during the rotation and adjustment of the position. On both sides of the clamping cylinder, guide rods are also symmetrically provided to cooperate with the sliding guide plate and the clamping cylinder. The guide rods assist the clamping cylinder in extension and retraction to jointly realize the lifting and sliding of the frame on the vehicle frame, and can also prevent the frame from deforming and jamming under force.

[0025] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of the unloading trolley structure of this utility model;

[0028] Figure 2 A schematic diagram showing the state in which the S1 coiling device presses down the inner diameter of the steel coil at the drum.

[0029] Figure 3 A diagram illustrating the state of the S3 coiling device pressing down the inner diameter of the steel coil. Figure 1 ;

[0030] Figure 4 A diagram illustrating the state of the S3 coiling device pressing down the inner diameter of the steel coil. Figure 1 ;

[0031] Figure 5 for Figure 1 AA cross-section view.

[0032] Figure label:

[0033] 1. Frame, 2. Pressing device, 3. First connecting rod, 4. Second lifting cylinder, 5. Bundling saddle, 6. Frame, 7. Pressing cylinder, 8. Driving rod, 9. Swing rod, 10. Second connecting rod, 11. Pressing rod, 12. First lifting cylinder, 13. Sliding guide plate, 14. Pin, 15. Steel coil, 16. Guide rod, 17. Drum, 18. Pressing head, 19. Idler roller. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0036] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] Please see Figures 1-5 This is an unloading trolley for preventing steel coils from loosening or falling off, comprising a frame 1 and a pressing device 2 disposed on one side of the frame 1. The pressing device 2 is mounted on the frame 1 near the bundling saddle 5. The bottom of the pressing device 2 is connected to the frame 1 via a first lifting cylinder 12; the top of the frame 1 is provided with rollers 19 for supporting the steel coils 15.

[0038] The pressing device 2 includes a frame 6 slidably mounted on one side of the frame 1. A movable pressing unit is provided on the frame 6. The pressing unit includes a pressing rod 11 located at the end away from the frame 6. One end of the pressing rod 11 is a free end, facing the inner diameter of the steel coil 15. The pressing rod 11 extends into the inner diameter of the steel coil 15 and presses the steel coil 15 against the idler roller 19 from the inside, preventing the steel coil 15 from loosening or falling off.

[0039] The bottom of the idler roller 19 is connected to the frame 1 via the second lifting cylinder 4. As the second lifting cylinder 4 rises and falls, the idler roller 19 moves up and down on the frame 1.

[0040] The bottom of the frame 1 is equipped with a traveling device, which allows the unloading trolley to move flexibly.

[0041] The piston rod end of the first lifting cylinder 12 is connected to the frame 6 via a pin, and the other end is connected to the trolley frame 1.

[0042] Example 1

[0043] In this embodiment, the clamping unit further includes a retractable clamping cylinder 7 mounted on the frame 6. The end of the clamping cylinder 7 furthest from the frame 6 is connected to the pressure rod 11 via a drive rod 8 and a first connecting rod 3. The end of the drive rod 8 furthest from the first connecting rod 3 is also connected to a second connecting rod 10, which is connected to a swing rod 9. One end of the swing rod 9 is connected to the frame 6, and the other end is connected to the pressure rod 11. The clamping cylinder 7 and the drive rod 8 are connected by a threaded connection. The drive rod 8, the first connecting rod 3, the second connecting rod 10, the pressure rod 11, the swing rod 9, and the frame 6 are rotatably connected by pins 14, so that the pressure rod 11 can move on the frame 6.

[0044] In some other embodiments of this utility model, the distance between the rocker arm 9 and the clamping cylinder 7 is less than the length of the first connecting rod 3; the included angle between the first connecting rod 3 and the driving rod 8 is always less than 180°; the length of the first connecting rod 3 is less than the length of the second connecting rod 10; the first connecting rod 3 is rotatably connected to the rocker arm 9 near the middle position by a pin, and the driving rod 8 is set horizontally.

[0045] The pressure rod 11 is equipped with a pressure head 18, which is used to press the steel coil 15 onto the idler roller 19. In this embodiment, the upward extension of the pressing cylinder 7 alone can cause the drive rod 8, the first connecting rod 3, the second connecting rod 10, the pressure rod 11, and the swing rod 9 to rotate relative to each other, thereby causing the pressure head 18 to extend into the inner diameter of the steel coil 15.

[0046] The pressure head 18 has a spherical structure. On the one hand, the outer surface of the spherical structure can fit against the inner arc surface of the steel coil 15. On the other hand, it can also prevent the steel coil 15 from being scratched during the rotation and adjustment of its position.

[0047] A sliding guide plate 13 is provided on the side of the frame 6 near the frame 1. Guide rods 16 are symmetrically arranged on both sides of the clamping cylinder 7. The guide rods 16 cooperate with the sliding guide plate 13 and the clamping cylinder 7. The guide rods 16 assist the clamping cylinder 7 in extending and retracting, so as to realize the lifting and sliding of the frame 6 on the frame 1, and also prevent the frame from deforming and jamming under force.

[0048] The unloading method using the above-mentioned unloading trolley for preventing loosening and falling of steel coil 15 includes the following steps:

[0049] S1. The steel coil 15 is placed on the drum 17. The uncoiling trolley moves to directly below the drum 17. The idler roller 19 rises to support the steel coil 15. The uncoiling trolley moves to move the steel coil 15 outward from the drum 17. When the edge of the steel coil 15 is at least one pressure head 18 away from the end of the drum 17 (or about half the width of the steel coil 15), the uncoiling trolley stops. The first lifting cylinder 12 drives the pressing device 2 to rise to the level of the inner diameter of the steel coil 15. Then the piston rod of the pressing cylinder 7 extends, driving the active rod 8, the swing rod 9 and the pressure rod 11 to rotate, so that the pressure head 18 enters the inner diameter of the steel coil 15 and presses the steel coil 15 downward. Pressure is generated between the inner diameter of the steel coil 15 and the idler roller 19, thereby preventing the steel coil 15 from loosening.

[0050] S2. The unwinding trolley continues to move out, completing the unwinding operation of the steel coil 15 from the drum 17. Due to the pressure of the pressure head 18, it can also prevent the coil from falling off due to the elasticity of the tail.

[0051] S3. The unloading trolley moves to the side of the bundling device, and the idler roller 19 approaches the bundling saddle 5 of the bundling device, with the bundling saddle 5 located below the steel coil 15. The first lifting cylinder 12 and the second lifting cylinder 4 retract synchronously, causing the idler roller 19 and the pressing device 2 to descend synchronously to maintain the pressure between the steel coil 15 and the idler roller 19. When the steel coil 15 contacts the bundling saddle 5, the idler roller 19 continues to descend, causing the steel coil 15 to detach from the idler roller 19 and fall onto the bundling saddle 5. At this time, the first lifting cylinder 12 descends, and the pressing head 18 presses the steel coil 15 onto the bundling saddle 5 and generates pressure. In this step, the steel coil 15 can be effectively prevented from loosening or falling off.

[0052] S4. After the bundling device completes the circumferential bundling of the steel coil 15, the clamping cylinder 7 retracts, causing the pressure rod 11 to move away from the inner diameter of the steel coil 15. The first lifting cylinder 12 retracts, causing the pressing device 2 to return to its initial position. The unloading trolley moves to the bottom of the next roll 17, ready for the next cycle of unloading operation.

[0053] The pressure head 18 presses down on the inner diameter of the steel coil 15 and the pressure generated between the idler roller 19 and the bundling saddle 5, and the pressure is determined according to the strength, specifications, self-weight, elastic stress and other parameters of the steel coil 15.

[0054] This utility model is developed based on the existing unwinding trolley structure, which can effectively prevent the steel coil 15 from loosening or falling off. It has a simple structure and low installation space requirements. It does not require an additional traveling mechanism, and the operation and control are simple. It can meet the unwinding of steel coils 15 of various specifications and sizes and is suitable for unwinding of various coiling machines. In some embodiments of this utility model, for medium-width steel, the applicable width range is 700mm to 2100mm and the outer diameter range is 1000mm to 2250mm.

[0055] This utility model, by setting a pressure device 2 on the frame 1 of the unloading trolley, maintains pressure between the inner diameter of the steel coil 15 and the trolley roller 19, and between the inner diameter of the steel coil 15 and the bundling saddle 5 throughout the process from before the steel coil 15 completely leaves the drum 17 to after the steel coil 15 is circumferentially bundled. This can effectively prevent loosening caused by the displacement of the core of the steel coil 15 and falling off caused by the bending elasticity of the tail of the steel coil 15.

[0056] The pressing device 2 of this utility model includes a rotatable active rod 8, a swing rod 9, a connecting rod and a pressing rod 11. Through the lifting cylinder and pressing cylinder 7 set at its bottom, the pressing device 2 can be flexibly lifted and rotated on the unloading trolley frame 1, so that the pressing head 18 on the pressing rod 11 can smoothly enter the inner diameter of the steel coil 15 and press the steel coil 15.

[0057] The pressure head 18 on the pressure rod 11 of this utility model is set as a spherical pressure head 18. On the one hand, the outer surface of the spherical structure can fit with the inner arc surface of the steel coil 15, and on the other hand, it can also avoid scratching the steel coil 15 during the rotation and adjustment of the position. On both sides of the clamping cylinder 7, guide rods 16 are also symmetrically provided to cooperate with the sliding guide plate 13 and the clamping cylinder 7. The guide rods 16 assist the clamping cylinder 7 in extending and retracting, so as to realize the lifting and sliding of the frame 6 on the frame 1, and can also avoid the occurrence of deformation and jamming under force.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A coil unloading trolley for preventing steel coils from loosening or falling off, characterized in that: It includes a frame (1) and a pressing device (2) disposed on one side of the frame (1); the bottom of the pressing device (2) is connected to the frame (1) via a first lifting cylinder (12); the top of the frame (1) is provided with a roller (19) for supporting the steel coil (15); The pressing device (2) includes a frame (6) slidably disposed on one side of the frame (1). The frame (6) is provided with a movable pressing unit. The pressing unit includes a pressing rod (11) disposed at one end away from the frame (6). The pressing rod (11) extends into the inner diameter of the steel coil (15) and presses the steel coil (15) from the inside onto the idler roller (19) to prevent the steel coil (15) from loosening or falling off. One end of the pressure bar (11) is a free end, which faces the inner diameter of the steel coil (15).

2. The unwinding trolley for preventing steel coil loosening and falling as described in claim 1, characterized in that: The clamping unit also includes a retractable clamping cylinder (7) disposed on the frame (6), and the end of the clamping cylinder (7) away from the frame (6) is connected to the pressure rod (11) in sequence through the active rod (8) and the first connecting rod (3); The active rod (8) is connected to a second connecting rod (10) at the end away from the first connecting rod (3). The second connecting rod (10) is connected to the swing rod (9). One end of the swing rod (9) is connected to the frame (6), and the other end is connected to the pressure rod (11). The clamping cylinder (7) and the driving rod (8) are connected by a thread. The driving rod (8), the first connecting rod (3), the second connecting rod (10), the pressure rod (11), the swing rod (9), and the frame (6) are rotatably connected to each other so that the pressure rod (11) can move on the frame (6).

3. The unwinding trolley for preventing steel coil loosening and falling as described in claim 2, characterized in that: The pressure bar (11) is provided with a pressure head (18), which is used to press the steel coil (15) onto the idler roller (19).

4. The unwinding trolley for preventing steel coil loosening and falling as described in claim 3, characterized in that: The pressure head (18) has a spherical structure.

5. The unwinding trolley for preventing steel coil loosening and falling as described in claim 2, characterized in that: The frame (6) is provided with a sliding guide plate (13) on the side near the vehicle frame (1), and guide rods (16) are symmetrically arranged on both sides of the clamping cylinder (7). The guide rods (16) cooperate with the sliding guide plate (13) and the clamping cylinder (7) to realize the lifting and sliding of the frame (6) on the vehicle frame (1).

6. The unwinding trolley for preventing steel coil loosening and falling as described in claim 2, characterized in that: The active rod (8), the first connecting rod (3), the second connecting rod (10), the pressure rod (11), the swing rod (9), and the frame (6) are rotatably connected by pins (14).

7. The unwinding trolley for preventing steel coil loosening and falling as described in claim 1, characterized in that: The bottom of the idler roller (19) is connected to the frame (1) through the second lifting cylinder (4). As the second lifting cylinder (4) rises and falls, the idler roller (19) moves up and down on the frame (1).

8. The unloading trolley for preventing steel coil loosening and falling as described in claim 1, characterized in that: The bottom of the frame (1) is equipped with a traveling device, which allows the unloading trolley to move flexibly.

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