Belt tensioner for belt conveyor

Abstract

The utility model relates to the technical field of tensioners, and discloses a belt tensioner for a belt conveyor, which comprises a mounting rack, the middle end of the front surface of the mounting rack is rotatably connected with an adjusting shaft, the front end of the adjusting shaft is slidably inserted with an adjusting block, and the front end of the adjusting block is fixedly connected with an adjusting plate. According to the belt tensioner for the belt conveyor, through the linkage design of the pressure sensor and the control host, the tension change of the belt can be monitored in real time and fed back to a control system, when it is detected that the belt is loose or too tight, the system automatically drives the motor to adjust the worm and gear mechanism, closed-loop control over the tensioning force is achieved, and the belt tensioning effect is improved. A dynamic adjusting mechanism avoids the limitation that a traditional mechanical tensioning device depends on manual intervention, slipping or excessive stretching of the belt is effectively prevented, a cooling mechanism formed by the radiating fins arranged on the circumference of the inner wall of the tensioning pipe and the axial flow fan remarkably reduces the temperature of the contact area of the belt and the tensioning pipe, and the service life of the belt is prolonged. The problems of belt aging, cracking and the like caused by high temperature are reduced, and the service life of the belt is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of tensioner technology, specifically a belt tensioner for belt conveyors. Background Technology

[0002] Tensioners are commonly used retaining devices in belt and chain drive systems. Their function is to maintain appropriate tension on the belt or chain during transmission, thereby preventing belt slippage or timing belt skipping, tooth breakage, and disengagement. They also prevent chain loosening or slippage, and reduce wear on sprockets and chains.

[0003] A prior patent (publication number: CN215567709U) discloses a belt tensioner, comprising: a tensioner housing, which is annular and has an opening; a tensioning arm is fixedly mounted at one end of the opening of the tensioner housing, and a roller is mounted at the other end via a fixing plate; a groove is formed on the outer side of the tensioning arm, and a slider is slidably disposed in the groove; a rotating shaft is rotatably mounted on the slider, and a first tensioning wheel is rotatably mounted on the rotating shaft; an adjusting arm, whose two ends are respectively fixedly mounted on the tensioner housing; an elongated groove is formed on the adjusting arm; and a movable arm, whose one end is rotatably mounted with a second tensioning wheel, and the other end is connected to an adjusting shaft, which passes through the elongated groove, and whose two ends are locked and fixed to the adjusting arm by locking nuts. The belt tensioner provided by this utility model has adjustable tension, can tension belts of different lengths and tension requirements, and also reduces the installation space required.

[0004] The tension of the aforementioned tensioner is adjustable, allowing for tensioning of belts of different lengths and tension requirements. This invention also reduces installation space requirements. However, in actual use, it is inconvenient to periodically check the belt's operating status and adjust the tension according to the belt's condition. Furthermore, it is difficult to control the tension during adjustment; excessive tension can increase belt wear, while insufficient tension can cause belt slippage. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a belt tensioner for belt conveyors, which has advantages such as automatic adjustment and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a belt tensioner for a belt conveyor, comprising a mounting frame, an adjusting shaft rotatably connected to the center of the front side of the mounting frame, an adjusting block slidably inserted into the front end of the adjusting shaft, an adjusting plate fixedly connected to the front end of the adjusting block, a pressure sensor mounted on the bottom of one end of the adjusting plate, a shaft plate fixedly connected to the monitoring end of the pressure sensor, a tensioning tube rotatably connected to the front side of the shaft plate, and two adjustable-gap limiting discs for limiting the movement of the two sides of the external belt on the outer surface of the tensioning tube;

[0007] The inner wall of the tension tube is provided with a set of circumferentially arranged heat dissipation fins, and each heat dissipation fin is integrally formed with the tension tube. A cooling mechanism is provided at the rear end of the tension tube.

[0008] Furthermore, a set of fixing holes are provided on the front side of the mounting bracket.

[0009] The above solution, with the mounting bracket and fixing holes, enables connection to the outer panel of the external conveyor.

[0010] Furthermore, a set of first adjustment holes arranged at equal intervals are provided on one side of the adjustment block.

[0011] The above scheme allows for the adjustment of the longitudinal position of the tension tube by sliding the adjustment block and the adjustment shaft, thereby enabling the tension tube to be positioned above or below the belt.

[0012] Furthermore, a set of second adjustment holes arranged at equal intervals are provided on the surface of the tension tube, and connecting blocks are fixedly connected to the sides of the two limiting discs that are far apart from each other.

[0013] With the above solution, the connection block and the second adjustment hole allow the user to easily adjust the distance between the two limit discs according to the width of the belt, and connect and fix them to the second adjustment hole with external bolts.

[0014] Furthermore, the cooling mechanism includes an anti-rotation ring, which is rotatably connected to the rear end of the tension tube. An axial flow fan is fixedly installed on the back of the anti-rotation ring, and the output end of the axial flow fan faces the tension tube and is on the same axis as the tension tube.

[0015] The above solution, through the setting of the anti-rotation ring, can prevent the axial flow fan from rotating with the tensioning pipe, thus avoiding the entanglement of the power supply harness.

[0016] Furthermore, a worm gear is rotatably connected between the left and right inner sidewalls of the mounting bracket, and a worm wheel is fixedly connected to the rear end of the adjusting shaft, with the worm wheel and the worm gear meshing together.

[0017] The above scheme, through the setting of worm gear and worm wheel, can achieve the purpose of self-locking of the tension tube position, effectively preventing the tension tube from shifting and improving tension stability.

[0018] Furthermore, a control host is mounted on the back of the mounting bracket, and a motor is mounted on one side of the mounting bracket. The output end of the motor is fixedly connected to one end of the worm gear through a coupling. The motor and the pressure sensor are both electrically connected to the control host.

[0019] Through the above scheme, by setting the control host, the data of the pressure sensor can be monitored. When the data decreases or increases, the forward and reverse rotation of the motor can be controlled accordingly, thereby adjusting the contact pressure between the tensioner and the belt to achieve the effect of automatic adjustment.

[0020] Furthermore, the outer surface of the tensioning tube and the outer surfaces of the two limiting discs are all polished.

[0021] The above solutions can effectively reduce wear on the belt, thereby ensuring the belt's service life.

[0022] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0023] This belt tensioner for belt conveyors, through the linkage design of pressure sensor and control host, can monitor belt tension changes in real time and feed back to the control system. When the belt is detected to be loose or too tight, the system automatically drives the motor to adjust the worm gear mechanism to achieve closed-loop control of tension. The dynamic adjustment mechanism avoids the limitations of traditional mechanical tensioning devices that rely on manual intervention, effectively preventing belt slippage or overstretching. The cooling mechanism composed of circumferentially arranged heat dissipation fins and axial flow fan on the inner wall of the tension tube significantly reduces the temperature of the contact area between the belt and the tension tube, reducing problems such as belt aging and cracking caused by high temperature, and extending the service life of the belt. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ;

[0025] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 2 ;

[0026] Figure 3 For the tensioning tube structure of this application Figure 1 ;

[0027] Figure 4 For the tensioning tube structure of this application Figure 2 .

[0028] In the picture:

[0029] 1. Mounting bracket; 101. Fixing hole;

[0030] 2. Adjusting shaft;

[0031] 3. Adjusting block; 301. First adjusting hole;

[0032] 4. Adjusting plate; 5. Pressure sensor; 6. Shaft plate;

[0033] 7. Tensioning tube; 701. Heat dissipation fins; 702. Second adjustment hole;

[0034] 8. Limit plate; 801. Connecting block;

[0035] 9. Cooling mechanism; 901. Anti-rotation ring; 902. Axial flow fan;

[0036] 10. Worm gear; 11. Worm wheel; 12. Control unit; 13. Motor. Detailed Implementation

[0037] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Please see Figure 1 , Figure 2 and Figure 3 This embodiment of a belt tensioner for a belt conveyor includes a mounting frame 1. A set of fixing holes 101 are provided on the front of the mounting frame 1. The mounting frame 1, in conjunction with the fixing holes 101, can connect to the outer plate of an external conveyor. An adjusting shaft 2 is rotatably connected to the middle of the front of the mounting frame 1. An adjusting block 3 is slidably inserted into the front end of the adjusting shaft 2. An adjusting plate 4 is fixedly connected to the front end of the adjusting block 3. A pressure sensor 5 is installed at the bottom of one end of the adjusting plate 4. A shaft plate 6 is fixedly connected to the monitoring end of the pressure sensor 5. A tensioning tube 7 is rotatably connected to the front of the shaft plate 6. Two adjustable-gap limiting discs 8 are provided on the outer surface of the tensioning tube 7 for limiting the movement of the two sides of the external belt. With the pressure sensor 5, when the belt is tensioned, its reaction force generates pressure to the pressure sensor 5. By monitoring the pressure, the operating status of the belt can be determined, thereby achieving automatic adjustment of the tension.

[0039] Please see Figure 1 , Figure 3 and Figure 4One side of the adjusting block 3 has a set of first adjusting holes 301 arranged at equal intervals. By sliding the adjusting block 3 and the adjusting shaft 2, the longitudinal position of the tension tube 7 can be adjusted, so that the tension tube 7 can be located above or below the belt. The inner wall of the tension tube 7 is provided with a set of circumferentially arranged heat dissipation fins 701, and each heat dissipation fin 701 is integrally formed with the tension tube 7. The rear end of the tension tube 7 is provided with a cooling mechanism 9. By setting the cooling mechanism 9, the air circulation efficiency inside the tension tube 7 can be increased, thereby achieving the purpose of cooling the tension tube 7. Through the contact between the tension tube 7 and the belt, the temperature of the belt can be reduced.

[0040] Please see Figure 1 , Figure 3 and Figure 4 The cooling mechanism 9 includes an anti-rotation ring 901, which is rotatably connected to the rear end of the tension tube 7. An axial flow fan 902 is fixedly installed on the back of the anti-rotation ring 901. The output end of the axial flow fan 902 faces the tension tube 7 and is on the same axis as the tension tube 7. The anti-rotation ring 901 prevents the axial flow fan 902 from rotating with the tension tube 7, thus preventing the power supply harness from getting tangled. A set of equally spaced second adjustment holes 702 are provided on the surface of the tension tube 7. Connecting blocks 801 are fixedly connected to the opposite sides of the two limiting discs 8. The connecting blocks 801 and the second adjustment holes 702 allow the user to easily adjust the distance between the two limiting discs 8 according to the width of the belt. The limiting discs 8 are then connected and fixed to the second adjustment holes 702 by external bolts. The outer surfaces of the tension tube 7 and the two limiting discs 8 are polished to effectively reduce wear on the belt and thus ensure the service life of the belt.

[0041] Please see Figure 1 , Figure 2 and Figure 3 A worm gear 10 is rotatably connected between the left and right inner walls of the mounting bracket 1. A worm wheel 11 is fixedly connected to the rear end of the adjusting shaft 2. The worm wheel 11 and the worm gear 10 are meshed together. The worm gear 10 and the worm wheel 11 can achieve the self-locking purpose of the tension tube 7, effectively preventing the tension tube 7 from moving on its own and improving the tensioning stability. A control host 12 is installed on the back of the mounting bracket 1, and a motor 13 is installed on one side of the mounting bracket 1. The output end of the motor 13 is fixedly connected to one end of the worm gear 10 through a coupling. The motor 13 and the pressure sensor 5 are electrically connected to the control host 12. The control host 12 can monitor the data of the pressure sensor 5. When the data decreases or increases, the forward and reverse rotation of the motor 13 can be controlled accordingly, thereby adjusting the contact pressure between the tensioner and the belt to achieve the effect of automatic adjustment.

[0042] In this embodiment, a belt tensioner for a belt conveyor, through the linkage design of pressure sensor 5 and control host 12, can monitor belt tension changes in real time and feed them back to the control system. When the belt is detected to be loose or too tight, the system automatically drives motor 13 to adjust the worm gear 11 and worm 10 mechanism to achieve closed-loop control of tension. The dynamic adjustment mechanism avoids the limitations of traditional mechanical tensioning devices that rely on manual intervention, effectively preventing belt slippage or overstretching. The cooling mechanism 9, consisting of circumferentially arranged heat dissipation fins 701 on the inner wall of tension tube 7 and axial flow fan 902, significantly reduces the temperature of the contact area between the belt and tension tube 7, reducing belt aging and cracking caused by high temperature, and extending the belt's service life.

[0043] The working principle of the above embodiment is as follows: When the tension tube 7 contacts the belt, the reaction force generated by the belt tension is transmitted to the pressure sensor 5 through the shaft plate 6. The pressure sensor 5 converts the tension signal into an electrical signal and transmits it to the control host 12 in real time to determine whether the current tension is within a safe range. When the tension is detected to be lower than the set value and the belt is loose, the control host 12 starts the motor 13 to rotate forward, driving the worm gear 10 to rotate through the coupling. The adjusting block 3 is slidably inserted into the adjusting shaft 2 through the first adjusting hole 301. The rotation of the worm wheel 11 drives the adjusting block 3 to rotate. The tension tube 7 is moved towards the belt direction; conversely, if the tension exceeds the limit, the motor 13 reverses to retract the tension tube 7, achieving bidirectional dynamic adjustment. The heat dissipation fins 701 inside the tension tube 7 accelerate heat conduction by increasing the surface area. The rear axial flow fan 902 passes through the interior of the tension tube 7 axially, dissipating frictional heat through forced convection, thereby reducing the temperature of the belt contact area and delaying rubber aging. The two limiting discs 8 cooperate with the second adjusting hole 702 through the connecting block 801, and the spacing can be adjusted along the axial direction of the tension tube 7, which can limit the belt and prevent belt deviation.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A belt tensioner for a belt conveyor comprising a mounting bracket (1), characterized in that: An adjusting shaft (2) is rotatably connected to the middle of the front side of the mounting bracket (1). An adjusting block (3) is slidably inserted into the front end of the adjusting shaft (2). An adjusting plate (4) is fixedly connected to the front end of the adjusting block (3). A pressure sensor (5) is installed at the bottom of one end of the adjusting plate (4). A shaft plate (6) is fixedly connected to the monitoring end of the pressure sensor (5). A tensioning tube (7) is rotatably connected to the front side of the shaft plate (6). Two adjustable spacing limit plates (8) are provided on the outer surface of the tensioning tube (7) for limiting the two sides of the external belt. The inner wall of the tension tube (7) is provided with a set of circumferentially arranged heat dissipation fins (701), and each heat dissipation fin (701) is integrally formed with the tension tube (7). The rear end of the tension tube (7) is provided with a cooling mechanism (9).

2. A belt tensioner for a belt conveyor as claimed in claim 1, characterized in that: The mounting bracket (1) has a set of fixing holes (101) on its front side.

3. A belt tensioner for a belt conveyor as claimed in claim 1, characterized in that: The adjusting block (3) has a set of first adjusting holes (301) arranged at equal intervals on one side.

4. The belt tensioner for a belt conveyor according to claim 1, characterized in that: The surface of the tension tube (7) is provided with a set of second adjustment holes (702) arranged at equal intervals, and the two limiting discs (8) are fixedly connected to the side away from each other by a connecting block (801).

5. The belt tensioner for a belt conveyor according to claim 1, characterized in that: The cooling mechanism (9) includes an anti-rotation ring (901), which is rotatably connected to the rear end of the tension tube (7). An axial flow fan (902) is fixedly installed on the back of the anti-rotation ring (901), and the output end of the axial flow fan (902) faces the tension tube (7) and is on the same axis as the tension tube (7).

6. A belt tensioner for a belt conveyor as claimed in claim 1, characterized in that: A worm gear (10) is rotatably connected between the left and right inner sidewalls of the mounting bracket (1), and a worm wheel (11) is fixedly connected to the rear end of the adjusting shaft (2), with the worm wheel (11) meshing with the worm gear (10).

7. A belt tightener for a belt conveyor according to claim 6, characterized in that The control host (12) is mounted on the back of the mounting bracket (1), and a motor (13) is mounted on one side of the mounting bracket (1). The output end of the motor (13) is fixedly connected to one end of the worm gear (10) through a coupling. The motor (13) and the pressure sensor (5) are both electrically connected to the control host (12).

8. A belt tensioner for a belt conveyor as claimed in claim 1, characterized in that: The outer surfaces of the tension tube (7) and the two limiting discs (8) are all polished.

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