CN-122009725-A - Improved belt tension device with middle pressing function

Abstract

The invention discloses a modified belt tension device with an intermediate pressing function. The improved belt tension device with the middle pressing function comprises a middle pressing hydraulic cylinder system and a groove-type pressing plate mechanism arranged on a belt pressing plate, wherein the middle pressing hydraulic cylinder system comprises a steel truss structure, a hydraulic cylinder, a ball head flange arranged at the top of the hydraulic cylinder and a hydraulic control system arranged in the hydraulic cylinder, and the groove-type pressing plate mechanism comprises a cover plate at the upper part and a bottom plate at the lower part. The improved belt tension device with the middle pressing function can effectively eliminate the bending deformation of the belt pressing plate in the use process, so that the pressing force of the belt tension machine is more stable and uniform, good friction force is provided for a tension belt, stable and uniform tension is generated on the metal plate, and the improvement and the guarantee of the coiling quality of the metal plate are facilitated.

Inventors

• TAO WENQIU

Assignees

• 上海宝井钢材加工配送有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (7)

1. 1. The improved belt tension device with the middle pressing function is characterized by comprising a middle pressing hydraulic cylinder system and a groove-shaped pressing plate mechanism arranged on a belt pressing plate, wherein the middle pressing hydraulic cylinder system comprises a steel truss structure, a hydraulic cylinder, a ball flange arranged at the top of the hydraulic cylinder and a hydraulic control system for controlling the hydraulic cylinder, and the groove-shaped pressing plate mechanism comprises an upper cover plate at the upper part, a groove-shaped bottom plate at the lower part and a cushion block.
2. 2. A modified belt tensioner having an intermediate hold down function as claimed in claim 1 wherein the steel truss structure is connected to the frame of the belt tensioner and the hydraulic cylinder is mounted in the middle of the steel truss structure.
3. 3. A modified belt tensioner having an intermediate hold down function as claimed in claim 2 wherein a piston rod is disposed within said hydraulic cylinder, said piston rod being driven by said hydraulic control system to move up and down.
4. 4. A modified belt tensioner having an intermediate hold down function as claimed in claim 3 wherein said ball flange is fixedly mounted to the top of said piston rod.
5. 5. A modified belt tensioner having an intermediate hold down function as claimed in claim 1, wherein the number of said grooved platen mechanisms is two, said grooved platen mechanisms being mounted on the upper and lower portions of said belt platen respectively, said grooved platen mechanisms on the upper portion of said belt platen being in contact with said ball flange and said grooved platen mechanisms on the lower portion of said belt platen being in contact with a frame.
6. 6. A modified belt tensioner having an intermediate hold down function as claimed in claim 1 wherein the channel bottom plate is provided with a bottom channel having a configuration consistent with the configuration of the tensioner belt.
7. 7. The improved belt tensioner with an intermediate hold down function of claim 6 wherein said channel bottom plate is further provided on both sides with a bead which clamps said channel platen mechanism to said belt platen.

Description

Improved belt tension device with middle pressing function Technical Field The invention relates to the technical field of belt tension, in particular to a modified belt tension device with an intermediate pressing function. Background The belt tensioner is a tension equipment unit in a metal plate longitudinal cutting production line, provides proper winding tension through different friction coefficients of the upper surface and the lower surface of a belt, does not generate any scratch or trace on the surface of a high-quality and exquisite plate, and is an important equipment unit of the high-quality steel plate longitudinal cutting processing production line. The belt tensioner has the working principle that the inner surface and the outer surface of the belt have different friction coefficients (the friction coefficient of the outer surface is larger than that of the inner surface), the special composite seamless belt is stretched by an idler pulley, and a metal sliding block plate with the surface subjected to special treatment is arranged in the middle. The metal slide plate is respectively arranged in the middle of the upper unit and the lower unit, the lower unit is arranged on the metal brackets at the two sides, and the upper unit is arranged on a structure which can move up and down through the hydraulic cylinder. When the plate material is dragged along the direction indicated by the arrow, the surface of the belt with the large friction coefficient is tightly adsorbed with the plate material, and the surface with the small friction coefficient slides on the metal sliding block. Thus, the endless belts are dragged together (rotated) by the sheet bars. At the same time, friction between the metal skillet and the inner surface of the belt creates a back tension in the sheet material strip. The adjustment of the amount of tension may be varied by increasing or decreasing the downward pressure of the ram. When the downward pressure of the oil cylinder is increased, the tension is also increased. According to the working principle t=2μ.w of the belt tensioner, the magnitude of the tension is varied by adjusting the magnitude of the downward pressure of the cylinder. The downward pressure of the oil cylinder 2 acts on the belt pressing plate, and in ideal conditions, the belt pressing plate 1 is approximately regarded as a rigid body, deformation does not occur, and the pressure a conducted on each belt is uniform and equal, as shown in the specific figure 1. However, the belt press is not a completely rigid body due to the nature of the material itself, and a slight bending deformation is generated by the pressure of both ends, as shown in fig. 2. The deformation causes the quality problems of insufficient intermediate pressure b of the belt tensioner, insufficient intermediate tension transmitted to the steel plate, unreeling, deviation and the like of the coiled steel coil during reeling. In production practice, the contact surface of the belt pressing plate 1 is often made into an arc-shaped surface with a certain convexity, so that the problem of unbalanced pressure caused by self deformation is solved. However, the height and radian of such arcuate surfaces are not a uniform standard due to the uncertainty in the thickness and width of the processed steel sheet. Often carry out adjustment processing according to experience, and the magnitude of pressure still can influence the deflection of clamp plate again in the in-service use, even causes the plastic deformation of holding down plate, and make belt tensioner unable normal use at all. Disclosure of Invention The invention aims to provide a modified belt tension device with a middle pressing function, which solves the problems that the conventional common belt tension machine adopts a mode that two ends are pressed down, when the two ends of the width direction of the belt tension machine are pressed down by a hydraulic cylinder, the middle cannot be well supported, the friction force of a belt is insufficient, the tension of a steel belt is insufficient, the technical problem of unreeling occurs, the condition that a belt pressing plate is bent and deformed in the use process can be effectively eliminated, the pressing force of the belt tension machine is more stable and uniform, good friction force is provided for a tension belt, stable and uniform tension is generated for a metal plate, and the improvement and the guarantee of the coiling quality of the metal plate are facilitated. In order to achieve the above purpose, the present invention adopts the following technical scheme: The improved belt tension device with the middle pressing function comprises a middle pressing hydraulic cylinder system and a groove-shaped pressing plate mechanism arranged on a belt pressing plate, wherein the middle pressing hydraulic cylinder system comprises a steel truss structure, a hydraulic cylinder, a ball head flange arranged at the top of the hydraul