A spiral tensioning device for belt conveyor

Abstract

The present invention provides a spiral tensioning device for a belt conveyor, comprising a first tensioning part and a second tensioning part, wherein the first tensioning part and the second tensioning part are connected by a bracket and are bilaterally symmetrical, and the first tensioning part and the second tensioning part both comprise a motor, a transmission mechanism connected to the motor, a tensioning device, a telescopic component arranged on the tensioning device, and a buffer coupling arranged between the telescopic component and the transmission mechanism. The technical solution of the present invention effectively reduces the labor intensity of manual adjustment, shortens the adjustment time, improves the asynchronous adjustment of the roller, and improves the adjustment accuracy.

Description

Technical Field

[0001] The invention relates to the field of automatic control of conveyors, and in particular to a spiral tensioning device for belt conveyors. Background Art

[0002] Belt conveyor is a kind of conveying equipment widely used in modern coal, cement, ports and mines. It has the advantages of simple structure, light weight, large conveying capacity, long transportation distance, low transportation cost and simple operation and maintenance.

[0003] After a certain period of use, the belt of the belt conveyor will become loose and slip, which will affect the normal operation of the conveyor. Belt conveyors basically include a tensioning device for the conveyor belt, whose main function is to keep the conveyor belt in a tensioned state and ensure sufficient friction between the conveyor belt and the drive roller, so that the conveyor can run smoothly.

[0004] At present, there are different tensioning methods for the tensioning device of the belt conveyor, mainly including vertical weight tensioning, car tensioning, winch tensioning, spiral screw tensioning, etc. The existing spiral tensioning device needs to manually twist the screw to operate each time the screw rod is adjusted. Its working principle is to twist the rotatable screw and the non-rotatable nut by external force, and through the screwing of the thread, the slide drives the head roller to move on the frame, and drives the roller to move a certain distance to achieve the purpose of tensioning the conveyor belt. This tensioning device has a simple structure, but there are some shortcomings, such as the long length of the screw rod, the long distance between the force point and the movement point, and the need for a large torque. It is only suitable for use on belt conveyors with low tensioning force. In actual use, the screw rod is also prone to bending and deformation, which reduces its service life. Manual adjustment has the defects of high labor intensity, long time, asynchronous front and back, and inaccuracy. In addition, due to the long distance between the force point and the movement point, and the generally compact layout of the conveyor on site, it will be very inconvenient for personnel to operate. Belt conveyors are constantly developing towards intelligence and unmanned operation. To address the above problems, this paper proposes an intelligent servo spiral tensioning device with automatic control function. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a spiral tensioning device for a belt conveyor, comprising a first tensioning part and a second tensioning part, wherein the first tensioning part and the second tensioning part are connected by a bracket and are symmetrical, and the first tensioning part and the second tensioning part both include a motor, a transmission mechanism connected to the motor, a tensioning device, a telescopic component arranged on the tensioning device, and a buffer coupling arranged between the telescopic component and the transmission mechanism. The telescopic component rotates and moves under the drive of the motor, thereby adjusting the tension of the belt conveyor belt. The technical solution of the present invention effectively reduces the labor intensity of manual adjustment, shortens the adjustment time, improves the asynchronous adjustment of the rollers, and improves the adjustment accuracy.

[0006] In this embodiment, the transmission mechanism includes a transmission shaft and a pressure sensor, one end of the transmission shaft is connected to the motor, and the pressure sensor is built into the transmission mechanism. When the pressure sensor monitors that the tensioning force is less than the preset tensioning force, the motor starts to drive the transmission mechanism and the tensioning device in the forward direction to achieve tensioning. When the pressure sensor monitors that the tensioning force is greater than the preset tensioning force, the motor starts to drive the transmission mechanism and the tensioning device in the reverse direction to achieve belt relaxation.

[0007] In this embodiment, a displacement sensor is provided on the bracket, and the displacement sensor is used to monitor the movement displacement of the roller.

[0008] Furthermore, the buffer coupling is used to connect the transmission shaft and the telescopic component, and a spring is arranged inside the buffer coupling, and the spring is sleeved on the transmission shaft.

[0009] Furthermore, the tensioning device includes a tensioning seat arranged on the bracket, a guide rail arranged in the tensioning seat, a first guide rail support frame arranged on the frame, and a second guide rail support frame installed on the tensioning seat.

[0010] Furthermore, one end of the telescopic component is connected to the buffer coupling, and the other end is connected to the tensioning seat. The telescopic component is a ball screw or a trapezoidal screw. The telescopic component rotates and moves under the drive of the motor, thereby adjusting the tension of the belt conveyor belt.

[0011] Furthermore, the tensioning seat has a left end and a right end, the left end of the tensioning seat is installed with a first guide rail and a second guide rail, the first guide rail cross-section is parallel and tightly installed with the tensioning seat cross-section, the second guide rail cross-section is installed at an angle with the first guide rail cross-section, and the right end of the tensioning seat is installed with a third guide rail and a fourth guide rail, the third guide rail cross-section is parallel and tightly installed with the tensioning seat cross-section, and the fourth guide rail is installed in parallel with the third guide rail.

[0012] Furthermore, the guide rail is a roller linear guide rail.

[0013] Furthermore, the tensioning seat is a door-shaped structure or a dovetail-shaped structure.

[0014] Furthermore, a dust cover is provided on the telescopic component.

[0015] The technical solution of the present invention effectively reduces the labor intensity of manual adjustment, shortens the adjustment time, improves the asynchronous adjustment of the rollers, and improves the adjustment accuracy. The use of guide rails for adjustment is beneficial to reducing the deformation of the telescopic parts and increasing the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects and advantages of the present invention will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein the same or similar elements are denoted by the same reference numerals.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0019] Figure 2 It is a schematic diagram of a top view of the structure of the present invention.

[0020] Figure 3 It is a cross-sectional schematic diagram of an embodiment of the first tensioning portion of the present invention.

[0021] Figure 4 It is a cross-sectional schematic diagram of the transmission mechanism of the present invention.

[0022] The serial numbers in the figure indicate:

[0023] 1-first tensioning part, 2-second tensioning part, 3-bracket, 4-motor, 5-transmission mechanism, 51-transmission shaft, 52-pressure sensor, 6-tensioning device, 7-telescopic component, 8-buffer coupling, 81-spring, 10-roller 11-dust cover, 12-displacement sensor;

[0024] The tensioning device 6 includes: 61 - tensioning seat, 62 - second guide rail support frame, 63 - first guide rail, 64 - second guide rail, 65 - third guide rail, 66 - fourth guide rail, 67 - first guide rail support frame. Implementation

[0025] The present invention will be further described in detail below in conjunction with embodiments. The advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are exemplary only and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the protection scope of the present invention.

[0026] The terms such as "comprising" and "including" indicate that in addition to the components directly and clearly stated in the specification and claims, the technical solution of the present invention does not exclude the situation of having other components that are not directly or clearly stated. In the description of this article, the directional terms such as "upper", "lower", "front", and "rear" are used. It should be understood that these directional terms are relative concepts. They are used to describe and clarify relative positions, and their corresponding specific orientations can change accordingly according to the change of the orientation of the tensioning device.

[0027] like Figure 1 It is a schematic diagram of the main view of the overall structure of the present invention. The present invention provides a spiral tensioning device 6 for a belt conveyor, including a first tensioning part 1 and a second tensioning part 2, wherein the first tensioning part 1 and the second tensioning part 2 are connected by a bracket 3, and are symmetrical on both sides, and are characterized in that: the first tensioning part 1 and the second tensioning part 2 both include a motor 4, a transmission mechanism 5 connected to the motor 4, a tensioning device 6, a telescopic component 7 arranged on the tensioning device 6, and a buffer coupling 8 arranged between the telescopic component 7 and the transmission mechanism 5. The telescopic component 7 rotates and moves under the drive of the motor 4, thereby adjusting the belt tension of the belt conveyor. The technical solution of the present invention effectively reduces the labor intensity of manual adjustment, shortens the adjustment time, improves the asynchronous adjustment of the tensioning seat on the first tensioning part and the tensioning seat on the second tensioning part, and improves the adjustment accuracy.

[0028] In this embodiment, if Figure 4 As shown, the transmission mechanism 5 includes a transmission shaft 51 and a pressure sensor 52. One end of the transmission shaft 51 is connected to the motor 4, and the other end is connected to the buffer coupling 8. The pressure sensor 52 is built into the transmission mechanism 5. When the pressure sensor 52 detects that the tension is less than the preset tension, the motor 4 starts to drive the transmission mechanism and the tensioning device 6 in the forward direction, driving the roller 10 to shift to achieve the tension of the belt; when the pressure sensor 52 detects that the tension is greater than the preset tension, the motor 4 starts to drive the transmission mechanism and the tensioning device 6 in the reverse direction to achieve the relaxation of the belt. It is conducive to adjusting the tension of the conveyor belt of the belt conveyor. When the tension is small, the conveyor belt is kept in a tensioned state to ensure that sufficient friction is generated between the conveyor belt and the transmission roller 10, so that the conveyor runs smoothly; when the tension is too large, the motor 4 reverses to relax the belt to avoid the belt from breaking due to excessive tension.

[0029] In this embodiment, if Figure 2 As shown, a displacement sensor 12 is provided on the bracket 3 for monitoring the displacement of the tensioning seats on the first tensioning part 1 and the second tensioning part 2. The technical purpose is that the displacement sensor 12 can monitor the displacement of the tensioning seats on the first tensioning part 1 and the second tensioning part 2 respectively, and can effectively avoid the tensioning seats 61 on both sides from moving asynchronously during telescopic movement.

[0030] In this embodiment, the buffer coupling 8 is used to connect the transmission shaft 51 and the telescopic component 7, and a spring 81 is arranged inside the buffer coupling 8, and the spring 81 is sleeved on the transmission shaft 51. It is helpful to offset the impact force of the roller 10 on the telescopic component 7 during the operation of the conveyor, reduce the bending deformation of the telescopic component 7, and improve the service life of the equipment.

[0031] In this embodiment, if Figure 3 As shown, the tensioning device 6 includes a tensioning seat 61 arranged on the bracket 3, a guide rail arranged in the tensioning seat 61, a first guide rail support frame 67 arranged on the frame, and a second guide rail support frame 62 installed on the tensioning seat, wherein the first guide rail support frame 67 is fixed on the frame and is also used to support the tensioning seat 61, and the second guide rail support frame 62 moves with the tensioning seat 61.

[0032] In this embodiment, one end of the telescopic component 7 is connected to the buffer coupling 8, and the other end is connected to the tensioning seat 61. The telescopic component 7 is a ball screw or a trapezoidal screw. The telescopic component 7 rotates and moves under the drive of the motor 4, thereby adjusting the tension of the belt conveyor belt.

[0033] In this embodiment, if Figure 3 As shown, the tensioning seat 61 has a left end and a right end, and the left end of the tensioning seat 61 is installed with a first guide rail 63 and a second guide rail 64, the cross-section of the first guide rail 63 is parallel to and tightly installed with the cross-section of the tensioning seat 61, and the cross-section of the second guide rail 64 is installed at an angle with the cross-section of the first guide rail 63, and the right end of the tensioning seat 61 is installed with a third guide rail 65 and a fourth guide rail 66, the cross-section of the third guide rail 65 is parallel to and tightly installed with the cross-section of the tensioning seat 61, and the fourth guide rail 66 is installed in parallel with the third guide rail 65. The technical purpose is: the angled installation mode of the first guide rail 63 and the second guide rail 64 forms a triangular installation opening with the first guide rail support frame 67, which is conducive to the fixation of the tensioning seat 61 and will not deviate laterally or deform; the parallel installation mode of the third guide rail 65 and the fourth guide rail 66 is conducive to the tensioning seat 61 maintaining a certain directionality. The combination of the two can effectively maintain the tensioning seat 61 with a certain directionality and move along the guide rail, and can also ensure that the tensioning seat 61 has a certain fixity without offset and deformation, which is conducive to the smooth movement of the tensioning seat along the guide rail.

[0034] In this embodiment, the guide rail is a roller linear guide rail, and the small friction force is conducive to the smooth movement of the tension seat 61. Figure 3The structure shown is a gate-shaped structure. In actual applications, a dovetail-shaped structure can also be adopted, which is conducive to the guidance of telescopic movement. In this embodiment, the telescopic component 7 is a ball screw, which is conducive to the smoothness of the telescopic movement. In other embodiments, a trapezoidal screw can also be used, which is conducive to reducing costs. In this embodiment, a dust cover 11 is also provided on the telescopic component 7 to keep the telescopic component 7 clean and reduce dust accumulation. The technical solution of the present invention effectively reduces the labor intensity of manual adjustment, shortens the adjustment time, improves the asynchronous adjustment of the roller 10, and improves the adjustment accuracy. The use of guide rails for adjustment is conducive to reducing the deformation of the telescopic component 7 and increasing the service life of the equipment.

[0035] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0036] 1. The present invention adjusts the tension by driving the transmission mechanism through a motor and then driving the telescopic mechanism, which is more efficient and accurate and greatly improves labor efficiency.

[0037] 2. The present invention uses a pressure sensor to actively monitor the tension of the conveyor belt, which can adjust the tension in time, reduce inspections, and reduce labor intensity and labor costs.

[0038] 3. The present invention adopts a displacement sensor to synchronously monitor the displacement of the tensioning seats of the first tensioning part and the second tensioning part, which can effectively avoid the asynchronous displacement of the tensioning seats on both sides during telescopic movement, thereby reducing the conveyor belt deviation caused by the asynchronous movement.

[0039] 4. The present invention adopts an angled installation method of the first guide rail and the second guide rail, forming a triangular installation opening with the tensioning seat, which is conducive to the fixation of the tensioning seat and prevents lateral deviation and deformation. The parallel installation method of the second guide rail and the fourth guide rail is conducive to the tensioning seat maintaining a certain directionality. The combination of the two can effectively maintain the tensioning seat with a certain directionality and move within the guide rail, and can also ensure that the tensioning seat has a certain fixity and will not deviate or deform.

[0040] 5. The present invention adopts a ball screw and a linear roller guide, which is conducive to the smoothness of the entire mechanism during the telescopic movement and improves the service life of the equipment.

[0041] The implementation schemes in the above embodiments can be further combined or replaced, and the embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various changes and improvements made to the technical solutions of the present invention by professional and technical personnel in this field all belong to the protection scope of the present invention.

Claims

1. A spiral tensioning device for a belt conveyor, comprising a first tensioning portion and a second tensioning portion, characterized in that: The first tensioning part and the second tensioning part are connected to each other by a bracket, and a displacement sensor is arranged on the bracket, and the displacement sensor is used to monitor the movement displacement of the roller; The first tensioning part and the second tensioning part each include a motor, a transmission mechanism connected to the motor, a tensioning device, a telescopic component arranged on the tensioning device, and a buffer coupling arranged between the telescopic component and the transmission mechanism; The tensioning device includes a tensioning seat arranged on the bracket, a guide rail arranged in the tensioning seat, a roller seat installed on the guide rail and a guide rail support frame for supporting the guide rail, the guide rail support frame includes a first guide rail support frame arranged on the frame and a second guide rail support frame installed on the tensioning seat, the tensioning seat has a left end and a right end, the left end of the tensioning seat is installed with the first guide rail and the second guide rail, the first guide rail cross-section is parallel and tightly installed with the tensioning seat cross-section, the second guide rail cross-section is installed at an angle with the first guide rail cross-section, the right end of the tensioning seat is installed with the third guide rail and the fourth guide rail, the third guide rail cross-section is parallel and tightly installed with the tensioning seat cross-section, the fourth guide rail is installed in parallel with the third guide rail, the first guide rail and the second guide rail are installed at an angle to form a triangular installation opening with the first guide rail support frame, and the tensioning seat is a door-shaped structure or a dovetail structure.

2. A spiral tensioning device for a belt conveyor according to claim 1, characterized in that: The transmission mechanism includes a transmission shaft and a pressure sensor, one end of the transmission shaft is connected to the motor, and the pressure sensor is built into the transmission mechanism. When the pressure sensor monitors that the tensioning force is less than the preset tensioning force, the motor starts to drive the transmission mechanism and the tensioning device in a forward direction to achieve tensioning. When the pressure sensor monitors that the tensioning force is greater than the preset tensioning force, the motor starts to drive the transmission mechanism and the tensioning device in a reverse direction to achieve belt relaxation.

3. A spiral tensioning device for a belt conveyor according to claim 1, characterized in that: The buffer coupling is used to connect the transmission shaft and the telescopic component. A spring is arranged inside the buffer coupling, and the spring is sleeved on the transmission shaft.

4. A spiral tensioning device for a belt conveyor according to claim 1, characterized in that: One end of the telescopic component is connected to the buffer coupling, and the other end is connected to the tensioning seat. The telescopic component is a ball screw or a trapezoidal screw.

5. The spiral tensioning device for a belt conveyor according to claim 1, characterized in that: The guide rail is a roller linear guide rail.

6. The spiral tensioning device for a belt conveyor according to claim 1, characterized in that: The telescopic component is also provided with a dust cover.

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