Anti-overturning of large volume roll tensioning device

Abstract

The application provides a screw rod tensioning device for preventing super large roll from dumping, which is applied to the technical field of industrial production and material processing, and a lifting lug is arranged in advance on a rotating disc of a unwinding machine; when a super large roll is placed on the rotating disc, a pressing disc is placed on the top of the super large roll, so as to play a certain pressing and positioning role. Then, a pull rod is passed through the pressing disc and the inner central hole of the super large roll, the hook at the bottom of the pull rod is hooked together with the lifting lug on the rotating disc, and then the locking device is operated to fasten the pull rod and the pressing disc, so that the unwinding machine, the super large roll, the pressing disc and the pull rod are tightly combined into a stable whole. The unwinding machine, the super large roll and the pressing disc are connected into a whole through the pull rod, and are fixed by using the locking device, so that the problem that the super large roll dumps due to centrifugal force, vibration or other factors during the operation of the unwinding machine is solved, and the device has the advantages of simple structure, convenient installation and good universality.

Description

Technical Field

[0001] This utility model relates to the field of industrial production and material processing technology, and in particular to a screw tensioning device for preventing oversized coils from tipping over. Background Technology

[0002] In the fields of industrial production and materials processing, unwinding machines are a common and crucial piece of equipment, often used to gradually unwind coils of PET plastic steel raw materials (referred to as "PET plastic steel extra-large coils") for subsequent processing steps. PET plastic steel extra-large coils typically have a large diameter, weight, and volume, making their stability during the unwinding process paramount.

[0003] In actual production, PET rolls are at risk of tipping over due to various factors. Firstly, uneven weight distribution, material inconsistencies, or defects during the winding process can cause the roll's center of gravity to shift during rotation, leading to tipping. Secondly, the unwinding machine may be subject to external vibrations or impacts, or improper operation or equipment malfunctions may cause instability in the rotating disc, further increasing the likelihood of tipping. Once a PET roll tipps over, it not only damages the raw materials and increases production costs but also poses a serious safety threat to surrounding equipment and personnel.

[0004] Currently, while some devices exist on the market for securing large PET rolls, most of these devices are complex in structure, inconvenient to install, and cannot be flexibly adjusted according to the actual size and weight of the large PET rolls, making it difficult to meet the diverse needs of different production scenarios. Therefore, developing a device that can effectively prevent large PET rolls from tipping over, with a simple structure, convenient installation, and good versatility is of significant practical importance. Utility Model Content

[0005] In view of the shortcomings of the prior art, this application provides a screw tensioning device to prevent oversized coils from tipping over. It is applied to the field of industrial production and material processing technology. It not only solves the problem of oversized coils tipping over due to centrifugal force, vibration or other factors during the operation of the unwinding machine, but also has the advantages of simple structure, convenient installation and good versatility.

[0006] This application provides a screw tensioning device for preventing oversized rolls from tipping over, which includes at least a lifting lug. The lifting lug is rotatably mounted on the rotating disk of the unwinding machine. The rotating disk is used to place the oversized roll and drive it to rotate and unwind. The top of the oversized roll is provided with a pressure plate.

[0007] It also includes a pull rod that passes through the pressure plate and the oversized coil, and a hook at the bottom of the pull rod is connected to the lifting lug;

[0008] It also includes a locking device, which is located at the contact point between the pull rod and the pressure plate to lock the pull rod and the pressure plate, so that the unwinding machine, the extra-large roll, the pressure plate and the pull rod form a whole.

[0009] Furthermore, the lead screw tensioning device also includes a support base, and the rotating disk is rotatably mounted on the support base via bearings, with the height of the rotating disk being higher than the height of the support base.

[0010] Furthermore, the lead screw tensioning device also includes a chassis, which is mounted on top of the rotary disk. The rotary disk drives the chassis to rotate, and the chassis is used to rotate and unwind the oversized coil on the chassis.

[0011] Furthermore, the chassis includes a positioning baffle, which is disposed on the outer edge of the chassis to assist in placing the oversized roll onto the chassis.

[0012] Furthermore, the pressure plate is provided with an observation hole for observing the connection status between the hook and the lug.

[0013] Furthermore, the support base also includes at least two load-bearing beams, which are arranged parallel to each other on both sides of the support base and form an installation space between the two load-bearing beams, the installation space being used to install the rotating disk.

[0014] Furthermore, the support base includes diagonal braces, which are disposed on both sides of the support base.

[0015] Furthermore, the locking device is a nut, and the surface of the pull rod is threaded, with the nut and the pull rod connected by a threaded engagement.

[0016] Furthermore, the cross-sectional area of ​​the bottom region of the nut is larger than the cross-sectional area of ​​its upper region.

[0017] Furthermore, the lead screw tensioning device also includes a drive motor and a transmission chain. The output end of the drive motor is connected to the rotary disk via the transmission chain, and the drive motor is used to provide power for the rotation of the unwinding machine.

[0018] Beneficial Effects: This application proposes a screw tensioning device to prevent the oversized coil from tipping over. Lifting lugs are pre-installed on the rotating disc of the unwinding machine. After the oversized coil is placed on the rotating disc, a pressure plate is placed on top to provide compression and positioning. Then, a tie rod is passed through the pressure plate and the central hole inside the oversized coil. The hook at the bottom of the tie rod is connected to the lifting lugs on the rotating disc. The tie rod and pressure plate are then secured by operating a locking device, thus tightly combining the unwinding machine, the oversized coil, the pressure plate, and the tie rod into a stable whole. This application connects the unwinding machine, the oversized coil, and the pressure plate into a single unit using a tie rod and secures them with a locking device. This not only solves the problem of oversized coils tipping over due to centrifugal force, vibration, or other factors during unwinding operation but also has the advantages of simple structure, convenient installation, and good versatility. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a screw tensioning device for preventing oversized coils from tipping over, as proposed in this application.

[0020] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.

[0021] Figure 3 This is a cross-sectional view of a screw tensioning device for preventing oversized coils from tipping over, as proposed in this application.

[0022] Figure 4 for Figure 3 A magnified view of a portion of region B in the middle.

[0023] Figure 5 This is a bottom view of a screw tensioning device for preventing oversized coils from tipping over, as proposed in this application.

[0024] Labeling Explanation: 1. Lifting lug; 10. Extra-large coil; 21. Rotary disc; 22. Bearing; 3. Pressure plate; 31. Observation hole; 4. Tie rod; 41. Lifting hook; 5. Locking device; 6. Support base; 61. Diagonal brace; 62. Load-bearing beam; 7. Chassis; 71. Positioning baffle; 8. Drive motor. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] This utility model proposes a screw tensioning device to prevent oversized rolls from tipping over, which includes at least a lifting lug 1. The lifting lug 1 is rotatably mounted on the rotating disk 21 of the unwinding machine. The rotating disk 21 is used to place the oversized roll 10 and drive it to rotate and unwind. The top of the oversized roll 10 is provided with a pressure plate 3.

[0028] It also includes a pull rod 4, which passes through the pressure plate 3 and the extra-large coil 10, and the hook 41 at the bottom of the pull rod 4 is connected to the lifting lug 1;

[0029] It also includes a locking device 5, which is located at the contact point between the pull rod 4 and the pressure plate 3 to lock the pull rod 4 and the pressure plate 3, so that the unwinding machine, the extra-large roll 10, the pressure plate 3 and the pull rod 4 form a whole.

[0030] Specifically, a lifting lug 1 is pre-installed on the rotating disc 21 of the unwinding machine. The rotating disc 21 is responsible for placing the extra-large coil 10 and driving it to rotate and unwind. After the extra-large coil 10 is placed on the rotating disc 21, a pressure plate 3 is placed on top of it to provide a certain degree of compression and positioning. Then, a pull rod 4 is passed through the pressure plate 3 and the central hole inside the extra-large coil 10. The hook 41 at the bottom of the pull rod 4 is precisely hooked with the lifting lug 1 on the rotating disc 21, thus forming a preliminary connection system. A special locking device 5 is provided at the contact position between the pull rod 4 and the pressure plate 3. By operating the locking device 5, the pull rod 4 and the pressure plate 3 are secured, preventing relative displacement between them. In this way, the unwinding machine, the extra-large coil 10, the pressure plate 3, and the pull rod 4 are tightly combined into a stable whole. When the unwinding machine starts and the rotating disc 21 begins to drive the extra-large coil 10 to rotate and unwind, the entire structure can maintain a high degree of stability because the pull rod 4 tightly connects and locks all parts. The tie rod 4 bears the weight of the oversized coil 10 and various forces generated during rotation. Through its connection with the lifting lug 1 and the pressure plate 3, it evenly transmits these forces to the rotating disc 21 of the unwinding machine, effectively preventing the oversized coil 10 from tipping over due to centrifugal force, vibration, or other external forces during rotation, thus ensuring the smooth operation of the unwinding process. Furthermore, the dimensions of the rotating disc 21 and the pressure plate 3 can be adjusted according to the dimensions of the oversized coil 10. This application connects the unwinding machine, the oversized coil 10, and the pressure plate 3 into a single unit using the tie rod 4 and secures them with the locking device 5. This not only solves the problem of the oversized coil 10 tipping over due to centrifugal force, vibration, or other factors during unwinding operation but also offers advantages such as simple structure, convenient installation, and good versatility.

[0031] In an optional embodiment, the lead screw tensioning device further includes a support base 6, and a rotating disk 21 is rotatably mounted on the support base 6 via a bearing 22, wherein the height of the rotating disk 21 is higher than the height of the support base 6.

[0032] Specifically, the support base 6 provides a solid and stable support platform for the entire lead screw tensioning device. When the oversized coil 10 is placed on the rotating disk 21, its weight and the centrifugal force generated during rotation are transmitted to the support base 6 through the rotating disk 21. The height of the rotating disk 21 is higher than the height of the support base 6, ensuring that when the oversized coil is placed on the rotating disk, the rotating disk 21 will drive the oversized coil to rotate together. At the same time, the support base 6 can effectively disperse various forces, avoiding excessive local stress that could cause deformation or damage to the device, thereby ensuring the structural stability of the entire device during operation.

[0033] In an optional embodiment, the lead screw tensioning device further includes a base plate 7, which is mounted on top of the rotating disk 21. The rotating disk 21 drives the base plate 7 to rotate, and the base plate 7 is used to rotate the extra-large roll 10 on the unwinding base plate 7.

[0034] Specifically, the chassis 7 is mounted on top of the rotating disk 21, providing a larger platform for the oversized roll 10. Compared to placing the oversized roll 10 directly on the rotating disk 21, the chassis 7 has a larger contact area with the oversized roll 10, which can more evenly distribute the weight of the oversized roll 10, reduce local stress concentration, and thus improve the stability of the oversized roll 10 during placement, reducing the risk of tipping over due to unstable placement. At the same time, the height of the rotating disk 21 is higher than the height of the supporting base 6, ensuring that the rotating disk 21 can drive the chassis 7 to rotate together, thereby causing the oversized roll on the chassis 7 to rotate.

[0035] It should be noted that a clearance part is provided at the center of the chassis 7 shaft, and the lifting lug 1 passes through the clearance part. Its bottom is movably connected to the rotating disk 21. When the rotating disk 21 rotates actively, the lifting lug 1 will not rotate with it; however, when the screw tensioning device tightens the large coil rotation, the lifting lug 1 will rotate with it.

[0036] In an optional embodiment, the chassis 7 includes a positioning baffle 71, which is disposed on the outer edge of the chassis 7 to assist in placing the oversized roll on the chassis 7.

[0037] Specifically, the positioning baffle 71 provides a clear reference point for the placement of the extra-large roll 10, avoiding positional deviations caused by manual placement. Operators only need to align the extra-large roll 10 with the positioning baffle 71, eliminating the need for repeated adjustments, significantly shortening the installation time and improving production efficiency. Correct installation of the extra-large roll 10 via the positioning baffle 71 ensures that its center is substantially aligned with the center of the rotating disk 21, guaranteeing uniform material tension during unwinding, reducing material wrinkles and breakage caused by concentricity deviations, and improving unwinding quality and product yield.

[0038] In an optional embodiment, the pressure plate 3 is provided with an observation hole 31, which is used to observe the connection status between the hook 41 and the lug 1.

[0039] Specifically, through the observation hole 31, operators can check in real time whether the hook 41 is securely connected to the lifting lug 1 and whether there are any abnormalities such as loosening or detachment. Once a problem is found, measures can be taken immediately, such as stopping the machine for inspection and reconnecting, to prevent the oversized coil 10 from tipping over due to connection failure and to ensure the safety of the production process.

[0040] In an optional embodiment, the support base 6 further includes at least two load-bearing beams 62, which are arranged in parallel on both sides of the support base 6 and form an installation space in the middle of the two load-bearing beams 62, the installation space being used to install the rotating disk 21.

[0041] Specifically, during the unwinding process, the rotation of the oversized coil generates lateral forces, which may cause the support base 6 to shift or tilt laterally. The frame structure formed by the two parallel load-bearing beams 62 has good lateral stiffness and can effectively resist the action of such lateral forces. The installation space formed between the two load-bearing beams 62 provides a clear area for the installation of the rotating disk 21. Installers can easily place the rotating disk in the predetermined position and fix and adjust it, simplifying the installation process, improving installation efficiency, and reducing installation time and labor costs.

[0042] In an optional embodiment, the support base 6 includes diagonal braces 61, which are disposed on both sides of the support base 6.

[0043] Specifically, during the unwinding process, the weight of the super-large coil 10 and the various forces generated by its rotation are transmitted to the support base 6. Diagonal braces 61 are positioned on both sides of the support base 6, providing support from multiple directions and distributing the pressure evenly across a wider area. For example, when the super-large coil 10 generates lateral forces due to rotation, the diagonal braces 61 can effectively resist these lateral forces, preventing the support base 6 from tilting or collapsing due to uneven stress.

[0044] In an optional embodiment, the locking device 5 is a nut, and the surface of the pull rod 4 is threaded, with the nut and the pull rod 4 connected by a threaded engagement.

[0045] Specifically, the threaded connection creates a tight engagement between the nut and the pull rod 4. During the locking process, by rotating the nut, the thread of the nut gradually advances along the thread of the pull rod 4 until the required locking force is reached. This tight engagement effectively prevents the nut from loosening on the pull rod 4, ensuring that the locking device 5 always maintains a stable locking state, providing reliable support and fixation for the unwinding process of the extra-large coil 10.

[0046] In one alternative embodiment, the cross-sectional area of ​​the bottom region of the nut is larger than the cross-sectional area of ​​its upper region.

[0047] Specifically, according to the friction formula Ff=μFN (where Ff is the friction force, μ is the coefficient of friction, and FN is the normal force), with the coefficient of friction μ remaining constant, the greater the normal force FN, the greater the friction force Ff. The increased cross-sectional area of ​​the nut's bottom region leads to a corresponding increase in the contact area with the chassis 7. Under the same preload, the pressure distribution per unit area in the bottom region is more uniform, and the normal force between the nut and the contact surface increases, thereby increasing the friction between the nut and the contact surface. This increased friction better resists the centrifugal force generated by the rotation and unwinding of the large coil 10, preventing the nut from rotating on the pull rod 4, ensuring the locking device 5 maintains a stable locking state, effectively preventing relative displacement between the pull rod 4 and related components, and ensuring the stability and safety of the device during operation.

[0048] In an optional embodiment, the lead screw tensioning device further includes a drive motor 8, the output end of which is connected to the rotary disk 21 via a transmission chain. The drive motor 8 is used to provide power for the rotation of the unwinding machine.

[0049] Specifically, during the unwinding process, the drive motor 8 can continuously output stable power, which is transmitted to the rotary table 21 through the transmission chain. The cooperation between the two ensures that the rotary table 21 rotates at a constant speed, thereby keeping the unwinding speed of the extra-large roll 10 stable.

[0050] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0051] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A screw tensioning device for preventing oversized coils from tipping over, characterized in that, It includes at least a lifting lug, which is rotatably mounted on the rotating disc of the unwinding machine. The rotating disc is used to place the oversized roll and drive it to rotate and unwind. The top of the oversized roll is provided with a pressure plate. It also includes a pull rod that passes through the pressure plate and the oversized coil, and a hook at the bottom of the pull rod is connected to the lifting lug; It also includes a locking device, which is located at the contact point between the pull rod and the pressure plate to lock the pull rod and the pressure plate, so that the unwinding machine, the extra-large roll, the pressure plate and the pull rod form a whole.

2. The screw tensioning device for preventing oversized coils from tipping over according to claim 1, characterized in that, The lead screw tensioning device also includes a support base, and the rotating disk is rotatably mounted on the support base via bearings, with the height of the rotating disk being higher than the height of the support base.

3. The screw tensioning device for preventing oversized coils from tipping over according to claim 2, characterized in that, The lead screw tensioning device also includes a chassis, which is mounted on top of the rotating disk. The rotating disk drives the chassis to rotate, and the chassis is used to rotate and unwind the oversized coil on the chassis.

4. The screw tensioning device for preventing oversized coils from tipping over according to claim 3, characterized in that, The chassis includes a positioning baffle, which is disposed on the outer edge of the chassis to assist in placing the oversized roll on the chassis.

5. The screw tensioning device for preventing oversized coils from tipping over according to claim 3, characterized in that, The pressure plate is provided with an observation hole, which is used to observe the connection status between the hook and the lug.

6. The screw tensioning device for preventing oversized coils from tipping over according to claim 2, characterized in that, The support base also includes at least two load-bearing beams, which are arranged parallel to each other on both sides of the support base and form an installation space between the two load-bearing beams for mounting the rotating disk.

7. The screw tensioning device for preventing oversized coils from tipping over according to claim 2, characterized in that, The support base includes diagonal braces, which are disposed on both sides of the support base.

8. The screw tensioning device for preventing oversized coils from tipping over according to claim 1, characterized in that, The locking device is a nut, and the surface of the pull rod is threaded. The nut and the pull rod are connected by a threaded engagement.

9. The screw tensioning device for preventing oversized coils from tipping over according to claim 8, characterized in that, The cross-sectional area of ​​the bottom region of the nut is larger than the cross-sectional area of ​​its upper region.

10. The screw tensioning device for preventing oversized coils from tipping over according to claim 1, characterized in that, The lead screw tensioning device also includes a drive motor, the output end of which is connected to the rotary disk via a transmission chain. The drive motor is used to provide power for the rotation of the unwinding machine.

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