Spiral tensioning device for belt conveyor

Abstract

The utility model provides a spiral tensioning device for a belt conveyor. The spiral tensioning device comprises a rack, a screw rod, a nut, a sliding frame and a pressure sensor. The rack is used for being fixedly connected to the upstream end or the downstream end of the belt conveyor. The screw extends in the front-back direction and is movably connected to the rack. The nut is in threaded connection with the screw. The sliding frame is fixedly connected to the nut. The sliding frame is slidably connected to the rack in the front-back direction. The sliding frame is used for being fixedly connected with a tensioning roller of the belt conveyor. A shaft shoulder is formed on the screw, and the pressure sensor is fixedly connected to the side, close to the sliding frame, of the shaft shoulder. And a thrust ball bearing sleeved on the screw rod is arranged between the pressure sensor and the shaft shoulder. The problems that when the tensioning force is manually adjusted, the adjusting degree of screws on the two sides is difficult to accurately master, the situation that a conveying belt is too tight or too loose is likely to occur, and the service life of the conveying belt and normal operation of a conveyor are affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyors, and in particular to a spiral tensioning device for belt conveyors. Background Technology

[0002] Spiral tensioning is generally suitable for belt conveyors with simple structures, short conveying distances, and low tension, such as material conveying in small mines and factories, and sand and gravel conveying at construction sites. Currently, most spiral tensioning devices on belt conveyors on the market are manually operated, requiring regular manual inspection and adjustment, which increases labor intensity and maintenance costs.

[0003] Moreover, when manually adjusting the tension of some existing spiral tensioning devices, it is difficult to accurately control the degree of adjustment of the screws on both sides, which can easily lead to the conveyor belt being too tight or too loose, affecting the service life of the conveyor belt and the normal operation of the conveyor. Utility Model Content

[0004] In view of the above problems, this utility model is proposed to provide a screw tensioning device for belt conveyors that overcomes or at least partially solves the above problems. It can solve the problem that when manually adjusting the tension, it is difficult to accurately control the adjustment degree of the screws on both sides, which can easily lead to the conveyor belt being too tight or too loose, affecting the service life of the conveyor belt and the normal operation of the conveyor.

[0005] Specifically, this utility model provides a spiral tensioning device for a belt conveyor, comprising two tensioning parts symmetrically arranged at the upstream and downstream ends of the belt conveyor. The tensioning parts include:

[0006] A frame, which is used to be fixedly connected to the upstream or downstream end of the belt conveyor.

[0007] A screw, which extends in a front-to-back direction and is movably connected to the frame.

[0008] A nut, which is threadedly connected to the screw.

[0009] A carriage is fixedly connected to the nut. The carriage is slidably connected to the frame in a front-to-back direction. The carriage is used to fixably connect to the tensioning roller of the belt conveyor. A shoulder is formed on the screw, and the frame stops at the side of the shoulder near the carriage.

[0010] A pressure sensor is fixedly connected to the frame. A shoulder is formed on the screw, and the pressure sensor is fixedly connected to the side of the shoulder near the carriage to monitor the magnitude of the axial force on the screw. A thrust ball bearing sleeved on the screw is provided between the pressure sensor and the shoulder.

[0011] Optionally, the spiral tensioning device further includes:

[0012] A drive device is connected to the screw to drive the screw to rotate.

[0013] A controller, electrically connected to the pressure sensor, is used to monitor the values ​​detected by the pressure sensor. The controller is also electrically connected to the drive unit for controlling its operation.

[0014] Optionally, the spiral tensioning device further includes a control panel, which is electrically connected to the controller to control the operation of the drive device.

[0015] Optionally, the tensioning part further includes a horizontally arranged support base, which is fixedly connected to one end of the frame near the drive device. The drive device is fixedly connected to the upper end of the support base.

[0016] Optionally, the drive device includes a motor and a worm gear reducer, the output end of the motor is connected to the input end of the worm gear reducer, and the output end of the worm gear reducer is connected to the end of the screw away from the frame.

[0017] Optionally, the spiral tensioning device further includes a display screen electrically connected to the pressure sensor, so that the value detected by the pressure sensor is displayed on the display screen.

[0018] In this novel spiral tensioning device, the large shoulder radius of the screw contacts the end face of the thrust ball bearing mounted on the screw. This causes the screw to be compressed by a pressure sensor when under tension, allowing the sensor to monitor the tension of the conveyor belt. This avoids the difficulty in accurately controlling the adjustment of the screws on both sides, preventing the conveyor belt from becoming too tight or too loose, ensuring the normal operation of the conveyor, and thus extending the service life of the conveyor belt.

[0019] Furthermore, the belt conveyor is equipped with tensioning sections at both the upstream and downstream ends. These two tensioning sections control the tension on both sides of the conveyor belt, and the tension on both sides of the conveyor belt is synchronized and equal through the detection of pressure sensors, thereby reducing the occurrence of belt deviation.

[0020] In addition, a thrust ball bearing is installed between the screw and the pressure sensor, so that the pressure sensor will not be driven to rotate when the screw rotates, thus avoiding wear on the pressure sensor.

[0021] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0022] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 This is a schematic structural diagram of a spiral tensioning device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic top view of a spiral tensioning device according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic side view of a spiral tensioning device according to an embodiment of the present invention.

[0026] List of reference numerals in the attached diagram:

[0027] 1. Drive unit; 2. Support base; 3. Thrust ball bearing; 4. Screw; 5. Pressure sensor; 6. Frame; 7. Nut; 8. Tensioning roller; 9. Slide carriage; 11. Controller. Detailed Implementation

[0028] The following reference Figures 1 to 3 This invention describes a spiral tensioning device for a belt conveyor according to an embodiment of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0029] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Figure 1 This is a schematic structural diagram of a spiral tensioning device according to an embodiment of the present invention, as shown below. Figure 1 As shown, and refer to Figures 2 to 3 This utility model provides a screw tensioning device for a belt conveyor, which includes two tensioning parts symmetrically arranged at the upstream and downstream ends of the belt conveyor. Each tensioning part includes a frame 6, a screw 4, a nut 7, a carriage 9, and a pressure sensor 5.

[0033] The frame 6 is used for fixed connection to the upstream or downstream end of the belt conveyor.

[0034] The screw 4 extends in the front-to-back direction and is movably connected to the frame 6. A shoulder is formed on the screw 4, and the frame 6 stops at the shoulder on the side near the carriage 9.

[0035] Nut 7 is threadedly connected to screw 4.

[0036] The slide 9 is fixedly connected to the nut 7. The slide 9 is slidably connected to the frame 6 in the front-to-back direction. The slide 9 is used to fix the tension roller 8 of the belt conveyor.

[0037] Pressure sensor 5 is fixedly connected to frame 6. Pressure sensor 5 is fixedly connected to the shoulder of the shaft near the slide 9 to monitor the magnitude of the tension force exerted on screw 4 by tension roller 8. A thrust ball bearing 3 is sleeved on screw 4 between pressure sensor 5 and the shoulder.

[0038] In this embodiment, the extension direction of the screw 4 is the same as the conveying direction of the conveyor belt. Due to the shoulder, the movement of the screw 4 toward the slide 9 is restricted when the screw 4 rotates, causing the nut 7, which is threaded with the screw 4, to move in the front-back direction, thereby driving the slide 9 and the tensioning roller 8 to move in the front-back direction to tension or loosen the conveyor belt fitted on the tensioning roller 8.

[0039] Because the shoulder radius of screw 4 is relatively large, it contacts the end face of the thrust ball bearing 3 sleeved on screw 4. When screw 4 is under tension, it squeezes pressure sensor 5, allowing the pressure sensor 5 to monitor the tension of the conveyor belt. This avoids the difficulty in accurately controlling the adjustment degree of the screws 4 on both sides, thus preventing the conveyor belt from becoming too tight or too loose, ensuring the normal operation of the conveyor, and ultimately improving the service life of the conveyor belt.

[0040] Furthermore, the belt conveyor is equipped with tensioning sections at both the upstream and downstream ends. The two tensioning sections control the tension on both sides of the conveyor belt, and the pressure sensor 5 ensures that the tension on both sides of the conveyor belt is synchronous and equal, thereby reducing the possibility of belt deviation.

[0041] In addition, a thrust ball bearing 3 is installed between the screw 4 and the pressure sensor 5. When the screw 4 rotates, it will not drive the pressure sensor 5 to rotate, thereby avoiding wear on the pressure sensor 5 and improving the service life of the pressure sensor 5.

[0042] In some embodiments of this utility model, the slide 9 and the tensioning roller 8 are connected by a bolt assembly, so that the tensioning roller 8 and the slide 9 are easy to disassemble and assemble.

[0043] In some embodiments of this utility model, the spiral tensioning device further includes a drive device 1 and a controller 11.

[0044] The drive unit 1 is connected to the screw 4 to drive the screw 4 to rotate.

[0045] The controller 11 is electrically connected to the pressure sensor 5 to monitor the values ​​detected by the pressure sensor 5. The controller 11 is also electrically connected to the drive unit 1 to control the operation of the drive unit 1.

[0046] In this embodiment, the controller 11 is connected to the pressure sensor 5. When a difference is detected between the value measured by the pressure sensor 5 and the set value, the controller can control the drive device 1 to rotate the screw 4 so that the pressure value detected by the pressure sensor 5 is the same as the set value. Specifically, if the measured value is larger than the set value, the controller controls the screw 4 to move the slide 9 in the direction of loosening the conveyor drive. If the measured value is smaller than the set value, the controller controls the screw 4 to move and rotate the slide 9 in the direction of tightening the conveyor drive until the value detected by the pressure sensor 5 is consistent with the set value. Then, the controller 11 controls the drive device 1 to stop working, thus realizing the automatic screw tensioning of the belt conveyor.

[0047] In some embodiments of this utility model, the spiral tensioning device further includes a control panel, which is electrically connected to the drive device 1 to control the operation of the drive device 1.

[0048] In this embodiment, the worker can operate directly on the control panel and control the operation of the drive device 1 by sending electrical signals to the controller 11. This allows the conveyor belt to not only adjust the axial force on the screw 4 to the set value, but also to manually change it to other values ​​as needed.

[0049] In some embodiments of this invention, the tensioning part further includes a horizontally arranged support base 2, which is fixedly connected to one end of the frame 6 near the drive device 1. The drive device 1 is fixedly connected to the upper end of the support base 2.

[0050] In this embodiment, the support base 2 is used to mount the drive device 1 to improve the connection stability of the drive device 1. Fixing the support base 2 to one end of the frame 6 also avoids the use of other components such as legs, reducing the manufacturing cost of the spiral tensioning device.

[0051] In some embodiments of this utility model, the drive device 1 includes a motor and a worm gear reducer. The output end of the motor is connected to the input end of the worm gear reducer, and the output end of the worm gear reducer is connected to the end of the screw 4 away from the frame 6.

[0052] In this embodiment, the presence of a speed reducer in the drive device 1 allows the drive device to have a large reduction ratio, thereby enabling the screw 4 to rotate slowly.

[0053] In some embodiments of this invention, the screw tensioning device can be adjusted as needed before the conveyor starts operating. During the adjustment phase, the number of rotations of the screw 4 can be slowly adjusted to test the position where the tensioning roller 8 moves to the conveyor belt without slipping.

[0054] The display shows the tension value and sets this value as the setting value for subsequent runs.

[0055] In some embodiments of this utility model, the spiral tensioning device further includes a display screen, which is electrically connected to the pressure sensor 5 so that the value detected by the pressure sensor 5 is displayed on the display screen.

[0056] In this embodiment, the worker can observe the value detected by the pressure sensor 5 in real time through the display screen, so that the worker can observe the magnitude of the tension on the conveyor belt in real time, and thus make it easier to adjust the tension of the conveyor belt.

[0057] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A screw tensioning device for a belt conveyor, characterized in that, It includes two tensioning sections symmetrically arranged at the upstream and downstream ends of the belt conveyor; the tensioning section includes: A frame, which is used to be fixedly connected to the upstream or downstream end of the belt conveyor; A screw, which extends in a front-to-back direction and is movably connected to the frame; Nut, which is threadedly connected to the screw; A slide is fixedly connected to the nut; the slide is slidably connected to the frame in a front-to-back direction; the slide is used to fixably connect to the tensioning drum of the belt conveyor; a shoulder is formed on the screw, and the frame stops at the side of the shoulder near the slide; A pressure sensor is fixedly connected to the frame; a shoulder is formed on the screw, and the pressure sensor is fixedly connected to the side of the shoulder near the carriage to monitor the magnitude of the axial force on the screw; a thrust ball bearing sleeved on the screw is provided between the pressure sensor and the shoulder.

2. The spiral tensioning device according to claim 1, characterized in that, The spiral tensioning device further includes: A drive device, connected to the screw, to drive the screw to rotate; The controller is electrically connected to the pressure sensor to monitor the value detected by the pressure sensor; the controller is also electrically connected to the drive device to control the operation of the drive device.

3. The spiral tensioning device according to claim 2, characterized in that, The spiral tensioning device also includes a control panel, which is electrically connected to the controller to control the operation of the drive device.

4. The spiral tensioning device according to claim 2, characterized in that, The tensioning part also includes a horizontally arranged support base, which is fixedly connected to one end of the frame near the drive device; the drive device is fixedly connected to the upper end of the support base.

5. The spiral tensioning device according to claim 2, characterized in that, The drive device includes a motor and a worm gear reducer. The output end of the motor is connected to the input end of the worm gear reducer, and the output end of the worm gear reducer is connected to the end of the screw away from the frame.

6. The spiral tensioning device according to claim 1, characterized in that, The spiral tensioning device also includes a display screen, which is electrically connected to the pressure sensor so that the value detected by the pressure sensor is displayed on the display screen.

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