Improved belt tension device with middle pressing function
By adding an intermediate pressure hydraulic cylinder system and a grooved pressure plate mechanism to the belt tensioner, the problem of insufficient intermediate support in the belt tensioner was solved, achieving stable and uniform tension, and improving the coiling quality of metal sheets and the processing capacity of the production line.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI BAO-MIT STEEL DISTRIBUTION CO LTD
- Filing Date
- 2024-11-12
- Publication Date
- 2026-05-12
AI Technical Summary
Existing conventional belt tensioners cannot obtain adequate support in the middle when pressing down at both ends, resulting in insufficient friction and quality problems such as loosening and deviation. Furthermore, the pressure plate is prone to bending and deformation during use.
By adding an intermediate downward pressure hydraulic cylinder system and a grooved pressure plate mechanism to the belt tensioner, the intermediate downward pressure is provided through the steel truss structure and hydraulic control system, eliminating the bending deformation of the pressure plate and ensuring uniform tension.
It achieves stable and uniform pressure under the belt tensioner, improves the coiling quality of metal sheets, especially when processing ultra-wide thin galvanized steel sheets, ensures good coil shape and tension, and expands the processing capacity of the production line.
Smart Images
Figure CN122009725A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of belt tension technology, and more specifically, to a modified belt tension device with an intermediate downward pressure function. Background Technology
[0002] The belt tensioner is a tensioning equipment unit in the slitting production line of metal sheets. It provides appropriate winding tension by using the different friction coefficients of the upper and lower surfaces of the belt, without causing any scratches or marks on the surface of high-quality and exquisite sheets. It is an important equipment unit in the high-quality steel sheet slitting production line.
[0003] The working principle of a belt tensioner is as follows: The inner and outer surfaces of the belt have different coefficients of friction (the coefficient of friction of the outer surface is greater than that of the inner surface). A special composite seamless belt is extended through idler pulleys, with a specially treated metal slider plate in the middle. The metal slider plates are installed in the middle of the upper and lower units respectively. The lower unit is mounted on metal supports on both sides, while the upper unit is mounted on a structure that can move up and down via a hydraulic cylinder. When the sheet material is dragged in the direction indicated by the arrow, the side of the belt with the higher coefficient of friction adheres tightly to the sheet material, while the side with the lower coefficient of friction slides on the metal slider. Therefore, the seamless belt is dragged along (rotates) by the sheet material. Simultaneously, the friction between the metal slider plate and the inner surface of the belt generates a counter-tension on the sheet material. The tension can be adjusted by increasing or decreasing the downward pressure of the hydraulic cylinder. When the downward pressure of the hydraulic cylinder increases, the tension also increases. According to the working principle of the belt tensioner, T = 2μ.W, the tension is changed by adjusting the downward pressure of the hydraulic cylinder. The downward pressure of cylinder 2 acts on the belt pressure plate. Ideally, the belt pressure plate 1 can be approximated as a rigid body that does not deform, and the pressure 'a' transmitted to each belt is uniform and equal. Figure 1 As shown. However, due to the inherent properties of the material, the belt pressure plate is not a completely rigid body; under the pressure at both ends, it will undergo slight bending deformation, as shown in the figure. Figure 2 As shown. This deformation causes insufficient intermediate pressure b in the belt tensioner, resulting in inadequate intermediate tension transmitted to the steel plate, leading to quality problems such as loose coiling and deviation during steel coil winding. In production practice, the contact surface of the belt pressure plate 1 is often made into an arc-shaped surface with a certain convexity to eliminate the pressure imbalance caused by its own deformation. However, due to the uncertainty of the thickness and width of the processed steel plate, there is no uniform standard for the height and curvature of this arc-shaped surface. It is often adjusted based on experience, and in actual use, the magnitude of the pressure will again affect the deformation of the pressure plate, and may even cause plastic deformation of the lower pressure plate, making the belt tensioner completely unusable. Summary of the Invention
[0004] The purpose of this invention is to provide a modified belt tensioning device with a middle downward pressure function. This addresses the technical problem that existing ordinary belt tensioners use a two-end downward pressure method, where the middle cannot obtain adequate support when the two ends of the belt tensioner are subjected to downward pressure from the hydraulic cylinders in the width direction. This results in insufficient belt friction, inadequate steel belt tension, and loosening of the belt. The modified device can effectively eliminate the bending and deformation of the belt pressure plate during use, making the downward pressure of the belt tensioner more stable and uniform. It provides good friction for the tension belt, generates stable and uniform tension on the metal sheet, and helps to improve and ensure the winding quality of the metal sheet.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A modified belt tensioning device with intermediate downward pressing function includes an intermediate downward pressing hydraulic cylinder system and a grooved pressure plate mechanism installed on the belt pressure plate. The intermediate downward pressing hydraulic cylinder system includes a steel truss structure, a hydraulic cylinder, a ball head flange set on the top of the hydraulic cylinder, and a hydraulic control system for controlling the movement of the hydraulic cylinder. The grooved pressure plate mechanism includes an upper cover plate, a lower grooved bottom plate, and a pad.
[0007] Furthermore, the steel truss structure is connected to the frame of the belt tensioner, and the hydraulic cylinder is installed in the middle of the steel truss structure.
[0008] Furthermore, the hydraulic cylinder is equipped with a piston rod, which moves up and down under the drive of the hydraulic control system.
[0009] Furthermore, the ball head flange is fixedly mounted on the top of the piston rod.
[0010] Furthermore, there are two grooved pressure plate mechanisms, which are respectively installed on the upper and lower parts of the belt pressure plate. The grooved pressure plate mechanism located on the upper part of the belt pressure plate is in contact with the ball head flange, and the grooved pressure plate mechanism located on the lower part of the belt pressure plate and the pad are in contact with the frame. The thickness of the pad is 0.20mm greater than the thickness of the grooved bottom plate.
[0011] Furthermore, the bottom plate of the groove is provided with a bottom groove, and the structure of the bottom groove is consistent with the structure of the tension belt.
[0012] Furthermore, pressure strips are provided on both sides of the bottom plate, and the pressure strips press the grooved pressure plate mechanism onto the belt pressure plate.
[0013] By adopting the above technical solution, the present invention has the following advantages:
[0014] This invention provides a modified belt tensioning device with intermediate downward pressure function. This device, by adding an intermediate downward pressure hydraulic cylinder system and a grooved pressure plate mechanism to the existing belt tensioner, effectively eliminates bending deformation of the belt pressure plate during use, making the downward pressure of the belt tensioner more stable and uniform. This provides good friction for the tension belt, generating stable and uniform tension on the metal sheet, which is beneficial for improving and ensuring the winding quality of the metal sheet. This belt tensioning device with intermediate downward pressure function is suitable for upgrading existing belt tensioners with a two-end downward pressure structure. By adding an intermediate downward pressure hydraulic cylinder system to the existing belt tensioner, the tension during sheet processing is more stable. Especially when processing ultra-wide thin galvanized steel sheets (width > 1500mm, thickness 0.6-0.8mm), good coil shape and tension are achieved, and the finished steel coil quality is stable. This expands the processing capacity and range of the production line. Attached Figure Description
[0015] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.
[0016] Figure 1 This is a diagram showing the pressure distribution of the hydraulic cylinder under the action of downward pressure on the belt pressure plate under ideal conditions.
[0017] Figure 2 This is a schematic diagram showing the slight bending deformation of the hydraulic cylinder under the pressure at both ends;
[0018] Figure 3 This is a schematic diagram of the belt tension device with intermediate downward pressure function of the present invention;
[0019] Figure 4 This is a front view of the intermediate downward hydraulic cylinder system of the present invention;
[0020] Figure 5 This is a side view of the intermediate downward hydraulic cylinder system of the present invention;
[0021] Figure 6 This is a top view of the intermediate downward hydraulic cylinder system of the present invention;
[0022] Figure 7 This is a front view of the grooved pressure plate mechanism of the present invention;
[0023] Figure 8 This is a top view of the grooved pressure plate mechanism of the present invention;
[0024] Figure 9 This is a side view of the grooved pressure plate mechanism of the present invention;
[0025] Figure 10 yes Figure 9Enlarged structural diagram at point A in the middle. Detailed Implementation
[0026] The technical solution of the present invention will be specifically described below with reference to the accompanying drawings. The detailed features and advantages of the present invention are described in detail in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, those skilled in the art can easily understand the related objects and advantages of the present invention.
[0027] A modified belt tensioning device with intermediate downward pressure function is specifically as follows: Figure 3 As shown, it includes a middle lower hydraulic cylinder system 4 and a grooved pressure plate mechanism 3 installed on the belt pressure plate 1. There are two grooved pressure plate mechanisms 3, which are installed on the upper and lower parts of the belt pressure plate 1, with one on the upper part and one on the lower part of the belt pressure plate 1.
[0028] The intermediate lower hydraulic cylinder system 4 is as follows: Figure 4 , Figure 5 and Figure 6 As shown, its main function is to apply downward pressure to the middle of the belt tensioner 1, eliminating the bending deformation of the belt tensioner 1 and making the pressure acting on each belt even and stable. It includes a steel truss structure 41, a hydraulic cylinder 42, a ball-head flange 43 located on top of the hydraulic cylinder 42, and a hydraulic control system located inside the hydraulic cylinder 42; the steel truss structure 41 is connected to the frame of the belt tensioner, and the hydraulic cylinder 42 is installed in the middle of the steel truss structure 41. The steel truss structure 41 consists of two crossbeams and steel channels fixedly connected to the crossbeams. The steel truss structure 41 mainly provides support for the installation of the hydraulic cylinder 42. The hydraulic cylinder 42 has a piston rod inside, which moves up and down under the drive of the hydraulic control system. The piston rod can move up and down under the drive of hydraulic force. A ball-head flange 43 is installed on the top of the piston rod, so that the downward pressure can be evenly transmitted to the belt tensioner 1. The hydraulic control system can realize the movement of the hydraulic cylinder 42 and the adjustment of pressure and speed.
[0029] The structure of the belt tensioner reveals that the belt pressure plate is covered by a ring-shaped tension belt on both the top and bottom. If a hydraulic cylinder were installed in the middle, the piston rod would interfere with the running tension belt as it acts on the belt pressure plate. To ensure the belt rotates normally while allowing the hydraulic cylinder's piston rod to press against the belt pressure plate 1, a grooved pressure plate mechanism 3 was specially designed.
[0030] The grooved pressure plate mechanism 3 is as follows: Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the system includes an upper cover plate 31, a lower trough-shaped bottom plate 32, and a pad 34. The trough-shaped pressure plate mechanism 3, located at the upper part of the belt pressure plate 1, is in contact with a ball-head flange 43, allowing the ball-head flange 43 of the hydraulic cylinder to act on it. The trough-shaped bottom plate 32 and the pad 34, located at the lower part of the belt pressure plate 1, are in contact with the frame. The trough-shaped bottom plate 32 has a bottom groove 33, the structure of which is consistent with the structure of the tension belt. Pressure strips are also provided on both sides of the trough-shaped bottom plate 32, which press the trough-shaped pressure plate mechanism onto the belt pressure plate 1. The thickness of the pad 34 is slightly greater than the thickness of the trough-shaped bottom plate 32, approximately 0.20 mm.
[0031] The intermediate-pressure hydraulic cylinder system of this invention, by adding an intermediate-pressure hydraulic cylinder system to the original belt tensioner, makes the tension of sheet metal processing more stable. Especially when processing ultra-wide thin galvanized steel sheets (width > 1500mm, thickness 0.6-0.8mm), good coil shape and tension are achieved, and the finished steel coil quality is stable. This expands the processing capacity and scope of the production line.
[0032] Finally, it should be noted that although the present invention has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Various equivalent changes or substitutions can be made without departing from the concept of the present invention. Therefore, any changes or modifications to the above embodiments within the essential spirit of the present invention will fall within the scope of the claims of the present invention.
Claims
1. A modified belt tensioning device with intermediate downward pressure function, characterized in that, The device includes an intermediate lower pressure hydraulic cylinder system and a grooved pressure plate mechanism mounted on a belt pressure plate. The intermediate lower pressure hydraulic cylinder system includes a steel truss structure, a hydraulic cylinder, a ball head flange disposed on the top of the hydraulic cylinder, and a hydraulic control system for controlling the hydraulic cylinder. The grooved pressure plate mechanism includes an upper cover plate, a lower grooved bottom plate, and a pad.
2. The modified belt tensioning device with intermediate downward pressure function as described in claim 1, characterized in that, The steel truss structure is connected to the frame of the belt tensioner, and the hydraulic cylinder is installed in the middle of the steel truss structure.
3. A modified belt tensioning device with intermediate downward pressure function as described in claim 2, characterized in that, The hydraulic cylinder is equipped with a piston rod, which moves up and down under the drive of the hydraulic control system.
4. A modified belt tensioning device with intermediate downward pressure function as described in claim 3, characterized in that, The ball head flange is fixedly installed on the top of the piston rod.
5. A modified belt tensioning device with intermediate downward pressure function as described in claim 1, characterized in that, There are two grooved pressure plate mechanisms, which are respectively installed on the upper and lower parts of the belt pressure plate. The grooved pressure plate mechanism located on the upper part of the belt pressure plate is in contact with the ball head flange, and the grooved pressure plate mechanism located on the lower part of the belt pressure plate is in contact with the frame.
6. A modified belt tensioning device with intermediate downward pressure function as described in claim 1, characterized in that, The bottom plate of the groove is provided with a bottom groove, and the structure of the bottom groove is consistent with the structure of the tension belt.
7. A modified belt tensioning device with intermediate downward pressure function as described in claim 6, characterized in that, The grooved bottom plate is also provided with pressure strips on both sides, which press the grooved pressure plate mechanism onto the belt pressure plate.