Hydraulic tensioning device for belt conveyors
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2026-08-11
AI Technical Summary
[0003]本实用新型目的在于提供一种带式输送机用液压张紧装置，以解决常用的输送带打滑解决方法为通过人工调整或于输送机上加设张紧装置，人工调整操作繁琐且需要停机进行，影响工作效率，而常见的张紧装置多为液压或绞车驱动的小车于轨道上滑动用以张紧输送带，但这种输送带张紧方式铺设空间较大，占用较多的水平空间，增加土建成本，带式输送机启动瞬间受输送带上承载物料惯性的影响，使输送带与驱动辊之间产生较大的张力而产生冲击载荷，常用的张紧装置难以及时适应缓冲冲击载荷为输送带进行松弛补偿，会极大的影响输送带的使用寿命的技术问题
[0007]本实用新型一种带式输送机用液压张紧装置具有以下优点：通过于机架下侧滑动设置有张紧辊，通过张紧辊两端设置的第一液压缸驱动张紧辊于机架上进行竖直方向上的滑动，通过张紧辊将绕行于其上的输送带进行张紧，通过监测液压缸油压确定对输送带的张紧力度，使输送带维持张紧状态，无需人工调节，占地面积小，确保输送带与驱动辊之间有足够的摩擦力，防止输送带打滑影响工作效率；通过于张紧辊上两侧水平方向滑动设置有缓冲辊，缓冲辊两端部两侧与机架之间均设置有缓冲弹簧，当输送带启动、制动或负载变化时，通过缓冲辊受输送带拉进或放松的力而水平移动，压缩缓冲弹簧，通过缓冲弹簧的弹性形变，吸收和释放冲击能量，为整个输送带提供“弹性”，从而实现对输送带动态张力的有效缓冲、减振和稳定控制，吸收启动时的冲击和振动，补偿制动时输送带的松弛，保护输送带和整个输送系统；通过在机架远离驱动辊一端滑动设置有同步辊，在通过第一液压缸驱动张紧辊竖直滑动张紧输送带的同时，使用第二液压缸驱动同步辊在机架上同步滑动张紧输送带，可以优化整体输送带上的张力分布，避免当需要驱动辊与输送带之间有足够大的摩擦力时使整体张紧力过大，降低输送机远离驱动辊一端的静态张力，降低输送带和部件之间的应力，增加输送带的使用寿命。
Smart Images
Figure CN224618646U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of belt conveyor devices, and particularly relates to a hydraulic tensioning device for belt conveyors. Background Technology
[0002] Belt conveyors are commonly used in industries such as manufacturing, ports, and logistics for transporting goods. After prolonged use, the conveyor belt may stretch due to stress and deformation, leading to slippage and difficulty in normal operation. Common solutions include manual adjustment or adding a tensioning device. Manual adjustment is cumbersome and requires machine downtime, affecting work efficiency. Common tensioning devices often involve hydraulic or winch-driven trolleys sliding on tracks to tension the conveyor belt. However, this method requires a large installation space, increasing construction costs. At startup, the inertia of the material on the conveyor belt causes significant tension between the belt and the drive rollers, resulting in impact loads. Common tensioning devices often fail to adequately absorb and compensate for these impact loads, significantly impacting the belt's lifespan. Utility Model Content
[0003] The purpose of this utility model is to provide a hydraulic tensioning device for belt conveyors to solve the common problem of conveyor belt slippage, which is to manually adjust or add a tensioning device to the conveyor. Manual adjustment is cumbersome and requires stopping the machine, affecting work efficiency. Common tensioning devices are mostly hydraulic or winch-driven trolleys that slide on the track to tension the conveyor belt. However, this method of tensioning the conveyor belt requires a large laying space, occupies a lot of horizontal space, and increases civil engineering costs. When the belt conveyor starts, the inertia of the material carried on the conveyor belt causes a large tension between the conveyor belt and the drive roller, resulting in an impact load. Common tensioning devices cannot adapt to and buffer the impact load in time to compensate for the slack of the conveyor belt, which will greatly affect the service life of the conveyor belt.
[0004] To achieve the above objectives, the specific technical solution of this utility model for a hydraulic tensioning device for a belt conveyor is as follows: A hydraulic tensioning device for a belt conveyor includes a frame; multiple idlers are mounted on the frame; a drive roller is mounted at one end of the frame; a motor is mounted on one side of the frame to drive the drive roller to rotate; a conveyor belt is arranged around the drive roller and multiple idlers within the frame; a tension roller is slidably mounted vertically below the motor on the frame; the conveyor belt travels around the underside of the tension roller; a first hydraulic cylinder is mounted on both sides of the frame opposite the tension roller; the cylinder head of the first hydraulic cylinder is fixedly connected to the end of the tension roller; buffer rollers are slidably mounted horizontally on both sides of the tension roller within the frame; the conveyor belt travels around one side of the buffer roller; buffer springs are mounted between both ends of the buffer roller and the frame.
[0005] Furthermore, the frame is provided with guide rods at both ends of the buffer roller; the ends of the buffer roller are slidably disposed on the outside of the guide rods.
[0006] Furthermore, a synchronous roller is slidably disposed at the end of the frame away from the drive roller; a second hydraulic cylinder is disposed on both sides of the frame at the position opposite to the end of the synchronous roller; the cylinder head of the second hydraulic cylinder is fixedly connected to the end of the opposite synchronous roller.
[0007] This utility model discloses a hydraulic tensioning device for a belt conveyor, which has the following advantages: A tensioning roller is slidably mounted on the underside of the frame. First hydraulic cylinders at both ends of the tensioning roller drive it to slide vertically on the frame, thus tensioning the conveyor belt. The tension is determined by monitoring the hydraulic cylinder pressure, maintaining the belt in a taut state without manual adjustment. It has a small footprint and ensures sufficient friction between the conveyor belt and the drive roller, preventing belt slippage and improving work efficiency. Buffer rollers are slidably mounted horizontally on both sides of the tensioning roller. Buffer springs are installed at both ends of the buffer rollers between them and the frame. When the conveyor belt starts, brakes, or the load changes, the buffer rollers move horizontally under the force of the conveyor belt pulling or relaxing, compressing the buffer springs. By utilizing the elastic deformation of the buffer spring, impact energy is absorbed and released, providing "elasticity" to the entire conveyor belt. This effectively buffers, reduces vibration, and stabilizes the dynamic tension of the conveyor belt, absorbing the impact and vibration during startup, compensating for the slack in the conveyor belt during braking, and protecting the conveyor belt and the entire conveying system. By sliding a synchronous roller at the end of the frame away from the drive roller, while the first hydraulic cylinder drives the tension roller to slide vertically and tension the conveyor belt, the second hydraulic cylinder drives the synchronous roller to slide synchronously on the frame to tension the conveyor belt. This optimizes the tension distribution on the overall conveyor belt, preventing excessive overall tension when sufficient friction between the drive roller and the conveyor belt is required. It also reduces the static tension at the end of the conveyor away from the drive roller, reduces stress between the conveyor belt and components, and increases the service life of the conveyor belt. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of region A in the middle; Figure 3 This utility model Figure 1 Enlarged view of region B in the middle; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This utility model Figure 4 Enlarged diagram of region C in the middle; The markings in the diagram are as follows: 1. Frame; 2. Idler roller; 3. Drive roller; 4. Motor; 5. Conveyor belt; 6. Tension roller; 7. First hydraulic cylinder; 8. Buffer roller; 9. Buffer spring; 10. Guide rod; 11. Synchronizing roller; 12. Second hydraulic cylinder. Detailed Implementation
[0009] To better understand the purpose, structure, and function of this utility model, the following detailed description of a hydraulic tensioning device for a belt conveyor, in conjunction with the accompanying drawings, is provided.
[0010] like Figure 1-5 As shown, this utility model discloses a hydraulic tensioning device for a belt conveyor, comprising a frame 1; multiple idler rollers 2 are mounted on the frame 1; a drive roller 3 is mounted at one end of the frame 1; a motor 4 is mounted on one side of the frame 1 to drive the drive roller 3 to rotate; a conveyor belt 5 is arranged around the drive roller 3 and multiple idler rollers 2 within the frame 1; a tensioning roller 6 is slidably mounted vertically below the motor 4 on the frame 1; the conveyor belt 5 is arranged around the lower side of the tensioning roller 6; a first hydraulic cylinder 7 is arranged on both sides of the frame 1 opposite to the tensioning roller 6; the cylinder head of the first hydraulic cylinder 7 is fixedly connected to the end of the tensioning roller 6; buffer rollers 8 are slidably mounted horizontally on both sides of the tensioning roller 6 within the frame 1; the conveyor belt 5 is arranged around one side of the buffer roller 8; buffer springs 9 are arranged between both ends of the buffer roller 8 and the frame 1.
[0011] Combination Figure 1-5 As shown, when the belt conveyor experiences low tension and slippage due to prolonged use, a tensioning roller 6 is slidably installed on the underside of the frame 1. The tensioning roller 6 is driven by the first hydraulic cylinders 7 at both ends to slide vertically on the frame 1, thus tensioning the conveyor belt 5 that is wrapped around it. The tensioning force of the conveyor belt 5 is determined by monitoring the hydraulic cylinder oil pressure, keeping the conveyor belt 5 in a taut state. No manual adjustment is required, the footprint is small, and sufficient friction between the conveyor belt 5 and the drive roller 3 is ensured to prevent slippage of the conveyor belt 5 from affecting work efficiency.
[0012] Buffer rollers 8 are horizontally slidable on both sides of the tension roller 6. Buffer springs 9 are installed between both ends of the buffer rollers 8 and the frame 1. When the conveyor belt 5 starts, brakes, or the load changes, the buffer rollers 8 move horizontally due to the force of the conveyor belt 5 pulling or relaxing, compressing the buffer springs 9. Through the elastic deformation of the buffer springs 9, the impact energy is absorbed and released, providing "elasticity" to the entire conveyor belt 5. This achieves effective buffering, vibration reduction, and stable control of the dynamic tension of the conveyor belt 5, absorbs the impact and vibration during startup, compensates for the slack of the conveyor belt 5 during braking, and protects the conveyor belt 5 and the entire conveying system.
[0013] Guide rods 10 are provided at both ends of the buffer roller 8 on the frame 1. The ends of the buffer roller 8 are slidably disposed on the outside of the guide rods 10. The buffer roller 8 slides and compresses the spring to buffer and absorb the impact force generated when the entire conveyor belt 5 starts and stops. When the buffer roller 8 moves, it slides on the guide rods 10. The guide rods 10 stabilize the sliding trajectory of the buffer roller 8, stabilize the compression spring to reduce the impact force, prevent the two ends of the buffer roller 8 from not moving in parallel during the movement, and prevent the buffer roller 8 from being tilted as a whole. This stabilizes the movement state of the buffer roller 8 and increases the buffering and vibration absorption effect.
[0014] A synchronous roller 11 is slidably mounted on the end of the frame 1 away from the drive roller 3; a second hydraulic cylinder 12 is mounted on both sides of the frame 1 at the end position opposite to the synchronous roller 11; the cylinder head of the second hydraulic cylinder 12 is fixedly connected to the end of the synchronous roller 11. By slidably mounting the synchronous roller 11 on the end of the frame 1 away from the drive roller 3, while the tension roller 6 is driven vertically by the first hydraulic cylinder 7 to tension the conveyor belt 5, the synchronous roller 11 is driven by the second hydraulic cylinder 12 to synchronously slide and tension the conveyor belt 5 on the frame 1. This optimizes the tension distribution on the overall conveyor belt 5, avoids excessive overall tension when sufficient friction is required between the drive roller 3 and the conveyor belt 5, reduces the static tension at the end of the conveyor away from the drive roller 3, reduces the stress between the conveyor belt 5 and the components, and increases the service life of the conveyor belt 5.
[0015] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A hydraulic tensioning device for a belt conveyor, characterized in that, Includes a frame (1); multiple idler rollers (2) are provided on the frame (1); a drive roller (3) is provided at one end of the frame (1); a motor (4) is provided on one side of the frame (1) to drive the drive roller (3) to rotate; a conveyor belt (5) is arranged around the drive roller (3) and multiple idler rollers (2) inside the frame (1); a tension roller (6) is slidably arranged vertically below the motor (4) on the frame (1); the conveyor belt (5) is arranged around the lower side of the tension roller (6); a first hydraulic cylinder (7) is arranged on both sides of the frame (1) opposite to the tension roller (6); the cylinder head of the first hydraulic cylinder (7) is fixedly connected to the end of the tension roller (6); a buffer roller (8) is slidably arranged horizontally on both sides of the tension roller (6) inside the frame (1); the conveyor belt (5) is arranged around one side of the buffer roller (8); buffer springs (9) are provided between the two ends of the buffer roller (8) and the frame (1).
2. The hydraulic tensioning device for a belt conveyor according to claim 1, characterized in that, The frame (1) is provided with guide rods (10) at both ends of the buffer roller (8); the ends of the buffer roller (8) are slidably disposed outside the guide rods (10).
3. The hydraulic tensioning device for a belt conveyor according to claim 1, characterized in that, A synchronous roller (11) is slidably arranged at one end of the frame (1) away from the drive roller (3); a second hydraulic cylinder (12) is arranged on both sides of the frame (1) at the end position opposite to the synchronous roller (11); the cylinder head of the second hydraulic cylinder (12) is fixedly connected to the end of the synchronous roller (11).