A belt take-up and unwinding device for a continuous belt conveyor

Abstract

This invention discloses a belt take-up and unwinding device for a continuous belt conveyor. The device includes a take-up and unwinding assembly and a measuring assembly. The take-up and unwinding assembly includes a control mechanism, a drive mechanism, and a drum mechanism. The drive mechanism drives the drum mechanism to perform take-up or unwinding actions. The control mechanism controls the working state of the drive mechanism. The control mechanism uses the measuring assembly to measure in real time the belt speed of the outermost layer of the conveyor belt and the overall diameter of the drum during take-up or unwinding actions. Based on the measured belt speed and drum diameter, the control mechanism adjusts the working state of the drive mechanism in real time to maintain a constant belt speed during take-up or unwinding. The solution provided by this invention is applicable to the take-up and unwinding operation of continuous belt conveyors, enabling constant belt speed control during take-up and unwinding, ensuring reliable operation, especially during take-up, and effectively overcoming the problems existing in the prior art.

Description

Technical Field

[0001] This invention relates to continuous belt conveyors, and more specifically to supporting technologies for continuous belt conveyors. Background Technology

[0002] With the rapid development of China's economy, projects such as power, coal mines, metallurgy, urban pipelines, and water conservancy have been launched one after another, and more and more tunnels are being built using TBMs. During tunnel construction, the application of continuous belt conveyors in their slag discharge system can achieve continuous slag discharge.

[0003] In the supporting technologies for continuous belt conveyors, the belt unloading and rewinding device is used during construction to replenish the conveyor belt in the belt storage bin of the continuous belt conveyor as the tunnel face advances; after the project is completed, the conveyor belt is pulled out from the belt storage bin for belt unloading. Therefore, it plays an important role in continuous belt conveyors.

[0004] Since the storage length of continuous belt conveyors is generally 400-600m, compared with 100-200m for grooving belt conveyors, the storage length requirement is higher. Furthermore, the hydraulic belt winding device used in grooving belt conveyors has too small a belt winding and unwinding capacity, which is difficult to meet the requirements of continuous belt conveyors.

[0005] Therefore, the belt take-up and unwinding devices used on continuous belt conveyors are mainly of two types: motor-driven without speed regulation function or manually speed-regulating function.

[0006] Among them, the winding and unwinding device without speed regulation has a constant speed. When such a winding and unwinding device is running, especially during the winding process, the load is very large. In the later stage, the diameter of the conveyor belt on the reel is very large, the linear speed of the conveyor belt is very high, and the moment of inertia and torque are extremely large. This can easily cause the motor to be overloaded and the mechanical structure to be unable to bear the load.

[0007] For manually adjustable belt take-up and unwinding devices, the motor speed can be manually controlled during the take-up process to reduce the linear speed of the conveyor belt. However, this operation can easily lead to unstable linear speed of the conveyor belt during take-up, poor control accuracy, and significant impact on the system.

[0008] Furthermore, most of the belt take-up and unwinding devices currently used in conveyors are hydraulic types, applicable to trough belt conveyors. These hydraulic devices use a hydraulic motor as the power mechanism, and the speed of the take-up and unwinding reel is determined by manually or electrically controlling the motor's speed. Since the speed control of the hydraulic motor itself is not precise, and there is no measure to measure the linear speed of the conveyor belt, the rough speed control is difficult to meet the requirements of the longer take-up and unwinding lengths of continuous conveyors. This results in the inability to control the tension of the conveyor belt during take-up, causing impact tension during take-up and making the operation unsafe.

[0009] Meanwhile, patent application CN109384071A specifically discloses a steel cord core belt winding device for continuous conveyors. This solution uses a stepless speed regulation mechanism to drive the conveyor belt with an electromagnetic speed regulating motor to achieve adjustable speed winding and unwinding. Its speed regulation technology is outdated, has low working efficiency, and long speed regulation response time, making it difficult to meet the requirements of intelligent speed regulation. Summary of the Invention

[0010] In view of the problems with the control precision and reliability of the existing belt take-up and unwinding devices used with continuous belt conveyors, the purpose of this invention is to provide a belt take-up and unwinding device for continuous belt conveyors, which can be matched with continuous belt conveyors and has high control precision and high reliability.

[0011] To achieve the above objectives, the present invention provides a belt take-up and unwinding device for a continuous belt conveyor, comprising a belt take-up and unwinding assembly, which includes a control mechanism, a drive mechanism, and a drum mechanism. The drive mechanism drives the drum mechanism to perform belt take-up or unwinding actions, and the control mechanism controls the working state of the drive mechanism. The belt take-up and unwinding device also includes a measuring component. The control mechanism uses the measuring component to measure in real time the belt speed of the outermost layer of the conveyor belt and the diameter of the coiled conveyor belt when the drum in the drum mechanism performs belt take-up or unwinding actions. The control mechanism adjusts the working state of the drive mechanism in real time based on the measured belt speed of the outermost layer of the conveyor belt and the diameter of the coiled conveyor belt, so as to control the conveyor belt to maintain a constant belt speed during the belt take-up or unwinding process.

[0012] Furthermore, the measuring component can simultaneously measure the belt speed of the outermost conveyor belt in the drum mechanism and the winding and unwinding angles of the conveyor belt.

[0013] Furthermore, the measuring component includes an elastic measuring frame, a speed sensor, and an inclination sensor. The speed sensor and the inclination sensor are mounted on the elastic measuring frame. One end of the elastic measuring frame is pre-pressed onto the outermost conveyor belt of the drum in the drum mechanism by elastic pressure, and can synchronously form a corresponding inclination angle change with the change of the diameter of the winding conveyor belt in the drum mechanism. The speed sensor abuts against the outermost conveyor belt of the drum in the drum mechanism along with the elastic measuring frame to measure the conveyor belt speed in real time. The inclination sensor can measure the inclination angle of the elastic measuring frame in real time.

[0014] Furthermore, the controller collects the diameter of the winding conveyor belt during the winding and unwinding process, thereby determining the control value of the current conveyor belt linear speed. By comparing this value with the measured current outermost conveyor belt speed, the controller controls the output speed of the drive mechanism to control the conveyor belt linear speed.

[0015] Furthermore, the controller synchronously collects the rate of change of the output torque of the drive mechanism, determines the tension at this moment, and controls the tension by adjusting the output speed of the drive mechanism.

[0016] Furthermore, the belt take-up and unwinding device also includes a reversing component, which is configured in conjunction with the drum mechanism to constrain the running direction of the conveyor belt.

[0017] Furthermore, the redirection assembly is composed of multiple sets of redirection rollers working together.

[0018] Furthermore, the drive mechanism consists of at least one variable frequency geared motor.

[0019] Furthermore, the winding mechanism includes a frame, a winding drum, and a bearing housing, wherein the bearing housing is mounted on the frame, and the winding drum is mounted on the frame via the bearing housing.

[0020] Furthermore, the frame is equipped with wheels that cooperate with the track.

[0021] The solution provided by this invention is applicable to the winding and unwinding operation of continuous belt conveyors. It abandons conventional methods and innovatively collects the drum diameter signal and the conveyor belt speed signal, and adjusts the motor speed in real time accordingly to control the constant belt speed of the conveyor belt during the winding and unwinding operation. This achieves reliable operation of the winding and unwinding operation, especially the winding operation, and effectively overcomes the problems existing in the prior art.

[0022] Furthermore, the solution provided by this invention specifically improves the speed regulation accuracy of the device by adding a redirecting roller and employing multiple control signals, achieving a stable constant belt speed during large-capacity belt winding and unwinding operations. This solves the problem of impact on the mechanical structure caused by the lack of speed regulation or poor speed regulation performance during belt winding and unwinding operations, especially under heavy loads such as during belt winding. It improves the efficiency of continuous belt conveyor winding and unwinding operations, shortens the work cycle, and the intelligent control mode effectively achieves the goal of reducing manpower and increasing efficiency, lowering construction costs, and creating favorable conditions for civilized construction and safe production.

[0023] Furthermore, the solution provided by this invention has a stable and reliable overall structure. When implemented, it can be applied to the belt take-up and unwinding device of existing continuous belt conveyors, making it highly practical. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a side view of the belt take-up and unwinding device for a continuous belt conveyor in an embodiment of the present invention;

[0026] Figure 2 This is a perspective view of the belt take-up and unwinding device for a continuous belt conveyor in an embodiment of the present invention;

[0027] Figure 3 This is a structural example diagram of the measuring component in an embodiment of the present invention;

[0028] Figure 4 This is a control principle diagram of the belt take-up and unwinding device for a continuous belt conveyor in an example of the present invention;

[0029] Figure 5 This is a diagram showing the operation of the belt unloading device for a continuous belt conveyor in an embodiment of the present invention. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0031] The belt take-up and unwinding device, as a crucial component of the downstream technology for continuous belt conveyors, is used for extending the conveyor belt during operation and for subsequent belt recovery. However, during the take-up and unwinding process, the diameter of the conveyor belt wound on the reel (or drum) is constantly changing, resulting in a continuous change in the linear speed of the conveyor belt. This poses a significant challenge to the speed control of the belt take-up and unwinding device.

[0032] For those skilled in the art, achieving constant belt speed control in a belt take-up and unwinding device requires determining the roll diameter of the conveyor belt to accurately control the take-up and unwinding process at a constant speed. Even slight differences in belt speed can cause significant tension impacts on the conveyor belt. If only the reel speed is controlled via open-loop control, it will cause large belt speed fluctuations, affecting the tension of the take-up and unwinding belts and causing belt tension fluctuations, thus impacting the take-up and unwinding process. If only a belt speed sensor is added, the conveyor belt is in a dynamic state during take-up and unwinding, resulting in unstable belt speed signals. Furthermore, only the theoretical value of the roll diameter at that moment can be obtained, leading to excessively large differences in the control reel speed, which can easily cause impacts. Moreover, the roll diameter is also in a dynamic state throughout the entire take-up and unwinding process, making it difficult to measure accurately with existing solutions.

[0033] This invention abandons the conventional method of indirectly monitoring and controlling the take-up and unwinding device used in continuous belt conveyors. Instead, it innovatively monitors the changes in the conveyor belt during take-up and unwinding, namely the changes in the winding diameter of the conveyor belt on the reel (or drum) and the linear speed of the conveyor belt. Based on the real-time data monitored, the working state of the take-up and unwinding device is adjusted in real time, effectively achieving a constant belt speed and adjusting the tension of the take-up and unwinding belt during the take-up and unwinding process, thereby ensuring reliable take-up and unwinding operations.

[0034] Furthermore, because this solution directly monitors and collects the diameter of the conveyor belt wound on the reel (or drum) and the linear speed of the conveyor belt during the winding or unwinding process, it effectively ensures the validity and accuracy of the collected data, thereby ensuring the accuracy of subsequent control of the conveyor belt speed and the tension of the winding and unwinding belt.

[0035] See Figure 1 and Figure 2 The diagram shows an example of the configuration of a belt take-up and untake-up device for a continuous belt conveyor provided by the present invention.

[0036] As shown in the figure, the continuous belt conveyor winding and unwinding device given in this example mainly consists of three parts: winding and unwinding assembly 100, measuring assembly 200, and redirection assembly 300.

[0037] The belt take-up and unwinding assembly 100 constitutes the main structure of this belt take-up and unwinding device, and is used to wind the corresponding conveyor belt 400, and is used in conjunction with a continuous belt conveyor to take up or unwind the conveyor belt 400.

[0038] The measuring component 200 is configured corresponding to the take-up and unwind assembly 100 and can cooperate with the take-up and unwind assembly 100 to monitor the working status of the take-up and unwind operations of the wound conveyor belt 400 in real time. Simultaneously, it directly measures the conveyor belt speed and the winding diameter of the conveyor belt during the take-up or unwind operation. Furthermore, the take-up and unwind assembly 100 can adjust its working status for taking up or unwinding the wound conveyor belt 400 in real time based on the conveyor belt speed and winding diameter directly measured by the measuring component 200, thereby controlling the conveyor belt 400 to maintain a constant belt speed during the take-up or unwind operation.

[0039] The redirection component 300 in the device is set in relation to the take-up and unload assembly 100 and the measuring component 200. It constrains the running direction of the conveyor belt 400 wound in the take-up and unload assembly 100, and fixes the starting position and conveying direction of the take-up or unload action of the conveyor belt 400, so that the measuring component 200 can perform fixed-point measurement of the state of the conveyor belt 400.

[0040] Combination Figure 1 and Figure 2 As shown, the take-up and unwinding belt assembly 100 in this example mainly includes the following components: variable frequency speed reduction motor 101, bearing housing 102, drum 103, frame 104, and side roller 105.

[0041] The bearing housing 102, the drum 103, the frame 104, and the side roller 105 constitute the corresponding drum mechanism, which serves as the main body for winding the conveyor belt 400.

[0042] The frame 104 forms the main support of the take-up and untake-down tape assembly 100, which carries the other components of the assembly and forms a winding operation space with the drum 103.

[0043] As an example, the rack 104 includes a base and two support frames symmetrically distributed on the base. The base adopts a square frame structure, which is stable and reliable and can reduce the overall weight. The two support frames each adopt an isosceles triangular structure, which also has high structural strength and can reduce the overall weight. In the rack 104 constructed in this way, an installation and operation space is formed between the two support frames.

[0044] The bearing housing 102 is mounted on the frame 104 and is used to mount and support the drum 103. Two sets of bearing housings 102 are symmetrically mounted on the top of the frame 104 so that the drum 103 can be rotatably mounted within the winding operation area formed by the frame 104.

[0045] As an example, when the bearing housing 102 is deployed, two bearing housings 102 are connected to a core, which is inserted into a drum 103. The drum 103 is used to fix the working conveyor belt on it for winding. At the same time, one end of one of the bearing housings is connected to a motor via a rotating shaft. The motor drives the core to rotate, and the rotation of the core pulls the conveyor belt to perform belt unwinding and winding.

[0046] The drum 103 is rotatably mounted in the bearing housing 102 via a corresponding shaft, forming the main component for winding the conveyor belt 400. The drum 103 can effectively wind the conveyor belt 400, and by rotating in different directions in the bearing housing 102, the unwinding or rewinding of the conveyor belt 400 can be achieved.

[0047] As an example, the drum 103 drives the drum through the rotation of the core, thereby winding and unwinding the conveyor belt. Its specific structure is not limited here and can be determined according to actual needs.

[0048] The roller guard 105 is mounted on the frame 104 and works in conjunction with the roller 103 mounted on the frame 104. It can limit the edge distance of the conveyor belt when the roller 103 is unloading or retracting the conveyor belt, thus preventing the conveyor belt from running off-track.

[0049] As an example, the drum side guard roller 105 is specifically fixed to the frame 104. It is extendable and retractable in both the radial and axial directions facing the drum 103, meaning it has an adjustable extension length in both directions. This allows it to maintain contact with the end face of the drum 103, thus limiting the conveyor belt 400 wound on the drum 103 during the winding and unwinding process. This controls any possible skewing of the conveyor belt during winding and fixes it within a certain range. Furthermore, this example includes wheels 106 at the base of the frame 104, working in conjunction with corresponding tracks. This allows the entire device to run on the tracks via the wheels, achieving a high degree of mobility.

[0050] For example, the wheel 106 can support the entire device and travel along a predetermined track, reducing the workload when the device is moved.

[0051] The variable frequency geared motor 101 in this take-up and unwind assembly 100 constitutes the drive mechanism of the entire take-up and unwind assembly, and is used to drive the drum mechanism to perform take-up or unwinding actions.

[0052] The variable frequency geared motor 101 here is located on one or both sides of the frame 104 corresponding to the drum 103, and drives the rotating shaft connected to the drum 103 and passing through the bearing seat 102 to drive the drum 103 to rotate.

[0053] As an example, the variable frequency geared motor 101 here is mainly composed of a frequency converter 101a, a variable frequency motor 101b, and a reducer 101c. The frequency converter 101a controls and connects to the variable frequency motor 101b, the power output end of the variable frequency motor 101b is connected to the reducer 101c, and the power output end of the reducer 101c drives and connects to the rotating shaft of the drum 103.

[0054] Corresponding to the variable frequency geared motor 101, the tape take-up and unwinding assembly 100 is also equipped with a corresponding electrical control system 107 as a control mechanism to control the working state of the variable frequency geared motor 101.

[0055] The electronic control system 107 controls the frequency converter 101a connected to the variable frequency geared motor 101 and outputs corresponding control signals to the frequency converter 101a. The frequency converter 101a can generate corresponding variable frequency motor working signals according to the control signals and output them to the variable frequency motor 101b, so that the frequency converter 101a adjusts the corresponding working state.

[0056] Based on the above-mentioned configuration of the take-up and unwind belt assembly 100, the redirection assembly 300 used in this example is configured with multiple sets of redirection rollers to restrict the running direction of the conveyor belt 400 in the take-up and unwind belt assembly 100. This not only ensures the stability and reliability of the operation, but also works with the measuring assembly 200 so that the measuring assembly 200 can be oriented to ensure the accuracy of the measurement.

[0057] For example, such as Figure 1 As shown, this example uses two sets of redirecting rollers. These two sets of redirecting rollers are arranged in cooperation on the base of the frame 104 and located below the drum 103. The first redirecting roller 310 is close to the winding side of the drum 103, fixing the starting position and conveying direction of the conveyor belt 400 for winding or unwinding. This allows the conveyor belt 400 that has detached from the drum 103 to be unwound through the first redirecting roller 310, or the conveyor belt 400 that has detached from the conveyor to be wound back onto the drum 103 after passing through the first redirecting roller 310 for winding.

[0058] The first redirecting roller 310 effectively limits the angle range of the conveyor belt 400 entering the drum, guiding the conveyor belt to be correctly wound into a coil, thereby effectively determining the size and range of the conveyor belt angle between the coiled conveyor belt and the redirecting roller. Thus, based on the layout position of the first redirecting roller 310 and the current winding angle of the conveyor belt, the winding diameter of the currently coiled conveyor belt can be accurately determined.

[0059] The second redirecting roller 320 extends outward relative to the first redirecting roller 310, forming a guide channel for the conveyor belt. This allows the upper and lower surfaces of the conveyor belt 400 to alternately pass over these redirecting rollers for directional transport. For example, the upper surface of the conveyor belt 400 passes over the first redirecting roller 310, while the lower surface passes over the second redirecting roller 320, and so on. The second redirecting roller 320 effectively guides the external conveyor belt into the take-up and untake-down device, determining the horizontal position of the conveyor belt as it enters the device, thus ensuring the stability of the conveyor belt 400 during high-speed operation.

[0060] In addition, more redirecting rollers can be added to the first redirecting roller 310 and the second redirecting roller 320 as needed, depending on the actual requirements.

[0061] In conjunction with the aforementioned redirection component 300, the measuring component 200 in this example is located at the bottom of the frame 104 in the take-up and unwind assembly 100, corresponding to the drum 103. The measuring component 200 is also connected and cooperates with the electronic control system 107 in the take-up and unwind assembly 100 to realize the real-time measurement of the belt speed of the outermost conveyor belt 400 and the diameter of the entire drum when the drum 103 performs the take-up or unwinding action in the drum mechanism. The measured data is then transmitted to the electronic control system 107 in real time. The electronic control system 107 can adjust the working state of the drive mechanism in real time according to the measured belt speed of the outermost conveyor belt and the drum diameter to control the conveyor belt to maintain a constant belt speed during the take-up or unwinding process.

[0062] In this example, the measuring component 200 is specifically located at the bottom of the frame 104 in the take-up and untake-down belt assembly 100, corresponding to the redirection assembly 300. Specifically, the measuring component 200 is preferably positioned relative to the first redirection roller 310 in the redirection assembly 300, so that the measuring component 200 can perform real-time measurement of the state of the conveyor belt 400 passing through the first redirection roller 310 in the redirection assembly 300 or entering the first redirection roller 310 after leaving the drum 103, in a fixed-point manner.

[0063] In this example, the measuring component 200 can simultaneously measure the belt speed of the outermost conveyor belt in the drum mechanism and the winding angle of the conveyor belt relative to the drum. The winding angle is the angle between the wound conveyor belt and the redirecting component 300, that is, the angle at which the conveyor belt enters the drum after leaving the redirecting component 300 or the angle at which it enters the redirecting component 300 after leaving the drum. Based on this angle value, the diameter of the conveyor belt wound on the drum is accurately determined, thereby ensuring that the measured conveyor belt speed and the winding diameter of the conveyor belt on the drum maintain a real-time correspondence, thus ensuring the accuracy of the subsequent winding and unwinding control of the belt by the electrical control system 107.

[0064] For example, the angle between the coiled conveyor belt and the redirecting roller typically ranges from 20° to 85°. By measuring this angle and based on the redirecting roller's position data, the diameter of the coiled conveyor belt at this moment can be calculated. Using the coiled diameter and the motor's rotational speed, the theoretical value of the conveyor belt's linear velocity at this moment can be precisely determined.

[0065] As a further explanation, the measured conveyor belt angle value can be used not only to directly determine the diameter of the conveyor belt wound on the drum, but also to directly determine the diameter of the entire drum (i.e., including the diameter of the drum itself and the diameter of the conveyor belt wound on the drum).

[0066] Specifically, in this example, the measuring component 200 directly contacts the outermost conveyor belt 400 of the drum 103 to synchronously and directly measure the belt speed of the outermost conveyor belt and the winding angle of the conveyor belt relative to the drum, thereby ensuring the accuracy of the measurement data.

[0067] When the conveyor belt 400 on the drum 103 is being wound or unwound, the diameter of the conveyor belt wound on the drum is constantly changing, which causes the linear speed of the conveyor belt to also be constantly changing. In this example, an innovative elastic measuring frame, speed sensor and tilt sensor are used to form a measuring component 200 that can be dynamically changed synchronously.

[0068] See Figure 3 The diagram illustrates one possible configuration of the measurement component 200 given in this example. Combined with... Figure 2 and Figure 3 As shown, this measuring assembly 200 is composed of a speed sensor 210, an inclination sensor 220, and an elastic measuring frame 230.

[0069] The elastic measuring frame 230 here is a movable structure. One end of it is pre-pressed onto the outermost conveyor belt 400 of the drum 103 in the drum mechanism by elastic pressure, and can synchronously form a corresponding tilt angle change with the change of the winding diameter of the conveyor belt on the drum.

[0070] The speed sensor 210 is mounted on the elastic measuring frame 230 and can directly contact the outermost conveyor belt of the drum 103 under the drive of the elastic measuring frame 230 to measure the real-time belt speed of the conveyor belt 400 during the belt winding and unwinding operation.

[0071] The tilt sensor 220 is also mounted on the corresponding elastic measuring frame 230, which can measure the tilt angle formed synchronously with the change of the winding diameter of the conveyor belt on the drum in real time.

[0072] As an example, the elastic measuring frame 230 in this example mainly includes a base plate 231, a measuring frame 232, and a connecting spring 233.

[0073] The base plate 231 here serves as a load-bearing component to support and house the measuring frame 232 and the connecting spring; the base plate 231 also serves as a connector for the entire elastic measuring frame 230, for connecting and fixing the elastic measuring frame 230 to the frame 104.

[0074] The specific composition of the base plate 231 is not limited here, as long as the structural performance can meet the above requirements.

[0075] In this example, the measuring frame 232 constitutes the sensor-bearing component and the actuating component of the entire elastic measuring frame 230. It is used to carry the speed sensor 210 and the angle sensor 220, and can synchronously generate corresponding follow-up movements as the winding diameter of the conveyor belt on the drum changes.

[0076] The measuring frame 232 is rotatably mounted on the base plate 231 at one end, and the entire frame can swing relative to the base plate 231 around the connection point with the base plate 231. For example, the measuring frame 232 preferably uses a hinged structure for rotatable connection with the base plate 231, which facilitates installation and maintenance and ensures reliability. The other end of the measuring frame 232, the free end, is used to mount the speed sensor 210; the middle area of ​​the measuring frame 232 is used to mount the angle sensor 220.

[0077] Specifically, the specific configuration of the measuring frame 232 is not limited here, as long as the structural performance can meet the above requirements.

[0078] In this example, the connecting spring 233, in conjunction with the measuring frame 232, can generate a certain elastic driving force on the measuring frame 232. This allows the top of the elastic measuring frame 232 to be pre-pressed onto the outermost conveyor belt 400 of the drum 103 in the drum mechanism when the elastic measuring frame 230 is installed in conjunction with the frame 104. Under the action of this elastic driving force, the top of the measuring frame 232 can be pre-pressed onto the outermost conveyor belt 400 of the drum 103 in the drum mechanism. It can also swing synchronously with the change in the winding diameter of the conveyor belt on the drum to maintain the pre-pressed state on the outermost conveyor belt 400 of the drum 103 in the drum mechanism.

[0079] Specifically, one end of the connecting spring 233 is connected to the measuring frame 232, preferably in the middle area of ​​the measuring frame 232, which can be determined according to actual needs; the other end of the connecting spring 233 is connected to the base plate 231; the connecting spring 233 configured in this way can generate an elastic tension on the measuring frame 232 facing the base plate 231 through its own elastic deformation, so as to serve as the corresponding elastic driving force.

[0080] Regarding the aforementioned configuration of the elastic measuring frame 230, in this example, the speed sensor 210 is specifically positioned at the top of the measuring frame 232 and serves as a contact part, allowing it to directly contact the conveyor belt surface under the drive of the measuring frame 232. Thus, the speed sensor 210, under the action of the connecting spring 233, is directly pressed against the conveyor belt and rotates with its movement, directly measuring the conveyor belt speed and ensuring accurate measurement results.

[0081] Regarding the aforementioned configuration of the elastic measuring frame 230, the tilt sensor 220 in this example is preferably located at the middle position of the elastic measuring frame 230, thereby accurately measuring the tilt angle value of the elastic measuring frame 230.

[0082] In this example, when the measuring component 200 is configured in conjunction with the belt take-up and unwinding component 100, the measuring frame 232, under the action of the connecting spring 233, can swing towards the conveyor belt, causing the speed sensor 210 on it to press tightly against the conveyor belt and rotate with the operation of the conveyor belt; at the same time, as the tilt angle of the conveyor belt changes, the measuring frame 232 will swing synchronously under the action of the connecting spring 233, and the tilt angle change of the measuring frame 232 will be measured in real time by the tilt angle sensor 220 on the measuring frame 232.

[0083] Specifically, in this configuration of the measuring assembly 200, the measuring frame 232, under the elastic tension of the connecting spring 233, drives the speed measuring wheel on the speed sensor 210 located at its top to abut and press against the outermost conveyor belt 400 of the drum 103. Simultaneously, based on the elastic tension of the connecting spring 233, the speed measuring wheel of the speed sensor 210 maintains a certain pressure against the outermost conveyor belt 400 of the drum 103, ensuring effective contact between the speed measuring wheel and the outermost conveyor belt 400. This allows the speed measuring wheel to always move synchronously with the outermost conveyor belt 400, enabling the measurement of the conveyor belt speed parameters through corresponding synchronous rotation, and ensuring the real-time nature and accuracy of the measurement results.

[0084] Meanwhile, under the elastic tension of the connecting spring 233, the measuring frame 232 maintains a certain pressure and presses against the outermost conveyor belt 400 of the drum 103. Thus, when the drum 103 changes the winding diameter of the conveyor belt due to the winding or unwinding action, the measuring frame 232 will swing synchronously under the elastic tension of the connecting spring 233. At this time, the tilt angle of the measuring frame 232 will change, and the tilt angle sensor 220 set on the measuring frame 232 will synchronously measure the tilt angle parameter of the measuring frame 232. Since the change of this tilt angle is directly based on the change of the winding diameter of the conveyor belt on the drum 103, the conveyor belt drum diameter parameter can be directly and accurately determined based on the measured tilt angle.

[0085] When this measuring component 200 is set up in conjunction with the take-up and unwind assembly 100, a reliable transmission structure enables the measuring sensor to directly and reliably contact the conveyor belt 400 on the drum 103. This allows for direct and real-time monitoring of the conveyor belt's changing state during take-up or unwinding operations, specifically changes in the winding diameter of the conveyor belt 400 on the drum and the linear speed of the conveyor belt. Because it can directly and in real-time monitor and collect changes in the diameter of the conveyor belt wound on the drum and the linear speed of the conveyor belt during take-up or unwinding operations, the validity and accuracy of the collected data are effectively guaranteed, thus ensuring the accuracy of subsequent adjustments to the conveyor belt speed and take-up / unwinding tension.

[0086] The belt take-up and unwinding device provided in this example can be used with a continuous belt conveyor to perform belt take-up or unwinding operations, and can effectively achieve constant belt speed and adjust belt tension during take-up and unwinding operations, thereby reliably carrying out belt take-up and unwinding operations.

[0087] See Figure 4 When this belt take-up and unwinding device is used in conjunction with a continuous belt conveyor for belt take-up or unwinding operations, the variable frequency reduction motor 101 in the belt take-up and unwinding assembly 100 drives the drum 103 to complete the belt take-up or unwinding operations in conjunction with the continuous belt conveyor.

[0088] Simultaneously, the electronic control system 107 in the take-up and unwind assembly 100 obtains the belt speed of the outermost conveyor belt 400 and the overall diameter of the drum based on the data measured in real time by the speed sensor 210 and tilt sensor 220 in the measuring assembly 200. In this way, the electronic control system 107 can adjust the operating state of the variable frequency reduction motor 101 in real time based on the measured belt speed of the outermost conveyor belt and the drum diameter, thereby controlling the conveyor belt to maintain a constant belt speed during take-up or unwinding.

[0089] Specifically, the electronic control system 107 can determine the diameter of the conveyor belt during the winding and unwinding process in real time based on the data measured by the tilt sensor 220. Based on this diameter data, it calculates the current control value of the conveyor belt linear speed and compares it with the conveyor belt speed measured by the pressure roller (i.e., speed sensor 210) to precisely control the motor output speed, thereby achieving constant belt speed control. Simultaneously, by collecting the rate of change of the motor output torque, it determines the current tension (i.e., the pulling force on the conveyor belt) and fine-tunes the motor output speed to control the tension.

[0090] The following example illustrates the specific implementation process of this belt take-up and unload device in conjunction with a continuous belt conveyor for belt take-up or unload operations.

[0091] Combination Figure 4 and Figure 5 In this example, when the belt unwinding device is used with a continuous belt conveyor for unwinding, the entire roll of conveyor belt is wound on the drum and installed between two bearing seats. The motor rotates, driving the drum to rotate, and the conveyor belt gradually detaches from the drum. The diameter of the conveyor belt on the drum decreases until the conveyor belt is completely detached. The load during the working process is small.

[0092] During the unwinding process, the conveyor belt gradually detaches from the drum. At this time, the diameter of the conveyor belt on the drum decreases, and the angle between the coiled conveyor belt and the redirecting assembly 300 gradually increases. Simultaneously, the tilt sensor 220 in the measuring assembly 200 measures the change in the unwinding angle of the conveyor belt in real time. Based on the data measured by the tilt sensor 220, the electrical control system 107 can determine the diameter of the coiled conveyor belt during the unwinding process in real time, and calculate the current control value of the conveyor belt linear speed based on this diameter data. Comparing this value with the conveyor belt speed measured by the speed sensor 210, the system precisely controls the motor output speed to achieve constant belt speed control. At the same time, by collecting the rate of change of the motor output torque, the system determines the current tension (i.e., the pulling force on the conveyor belt) and fine-tunes the motor output speed to control the tension.

[0093] Combination Figure 2 and Figure 5 In this example, when the belt winding device is used with a continuous belt conveyor for belt winding, the conveyor belt is wound along the redirecting roller onto the drum and fixed. The motor is started, and the external conveyor belt is gradually wound onto the drum. The external load of the conveyor belt is large, and the required tension is large. To ensure a constant belt speed, it is necessary to prevent the increase in rotational inertia caused by the increase in diameter from impacting and affecting the mechanical structure.

[0094] During the conveyor belt take-up process, the conveyor belt gradually winds into the drum. At this time, the diameter of the conveyor belt on the drum gradually increases, and the angle between the coiled conveyor belt and the redirection assembly 300 gradually decreases. Simultaneously, the tilt sensor 220 in the measuring assembly 200 measures the change in the unwinding angle of the conveyor belt in real time. Based on the data measured in real time by the tilt sensor 220, the electrical control system 107 can determine the diameter of the coiled conveyor belt during the take-up and unwinding process, and calculate the current control value of the conveyor belt linear speed based on this diameter data. Comparing this value with the conveyor belt speed measured by the speed sensor 210, the system precisely controls the motor output speed to achieve constant belt speed control. At the same time, by collecting the rate of change of the motor output torque, the system determines the current tension (i.e., the pulling force on the conveyor belt) and controls the tension by fine-tuning the motor output speed.

[0095] As can be seen from the above example, when this belt take-up and unwinding device is used with a continuous belt conveyor for belt take-up and unwinding, the rotation of the variable frequency reduction motor and the rotation of the conveyor belt wound on the drum cause a significant change in its diameter. This belt take-up and unwinding device improves the accuracy of the drum diameter data by directly measuring the conveyor belt speed parameter and converting the change in the conveyor belt angle into the drum diameter parameter. At the same time, the electrical control system controls the speed change of the variable frequency reduction motor in real time based on the measured conveyor belt speed and drum diameter parameters, thereby achieving constant belt speed take-up and unwinding of the conveyor belt.

[0096] In summary, this belt take-up and unwinding device is effectively applicable to the take-up and unwinding operation of continuous belt conveyors. By automatically collecting the drum diameter signal and the conveyor belt speed signal, it adjusts the speed of the variable frequency motor in real time through the electrical control system, thereby controlling the constant belt speed of the conveyor belt during the take-up and unwinding operation and achieving reliable operation, especially the take-up operation.

[0097] Furthermore, this belt take-up and unwinding device uses a redirecting roller to constrain the running direction of the conveyor belt, thereby facilitating the arrangement of the measuring device and enabling the acquisition of corresponding control signals.

[0098] Furthermore, the measuring components in this belt take-up and unwinding device integrate the functions of measuring belt speed and tilt angle. Through parameter calculation, the angle signal is directly converted into the corresponding drum diameter signal, improving the accuracy of the diameter data. In this way, the electrical control system compares the belt speed and drum diameter in real time, and adjusts the speed of the variable frequency motor driving the drum rotation in real time according to the changes in both, so as to achieve the purpose of stabilizing the belt speed.

[0099] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A belt take-up and unwinding device for a continuous belt conveyor, comprising a belt take-up and unwinding assembly, the belt take-up and unwinding assembly including a control mechanism, a drive mechanism, and a drum mechanism, the drive mechanism driving the drum mechanism to perform belt take-up or unwinding actions, and the control mechanism controlling the working state of the drive mechanism; characterized in that, The tape take-up and release device also includes a measuring component, which is composed of a speed sensor, an inclination sensor and an elastic measuring frame. The elastic measuring frame is a movable structure. One end of it is pre-pressed onto the outermost conveyor belt of the drum mechanism by elastic pressure, and can synchronously change its tilt angle with the change of the conveyor belt winding diameter. The elastic measuring frame consists of a base plate, a measuring frame, and connecting springs. The base plate serves as a load-bearing component to support and house the measuring frame and connecting springs. The base plate also serves as a connector for the entire elastic measuring frame, used to connect and fix the elastic measuring frame to the machine frame. The measuring frame constitutes the sensor-bearing and actuating components of the entire elastic measuring frame, used to support the speed sensor and angle sensor. The measuring frame is rotatably mounted on the base plate at one end, and the entire frame can swing relative to the base plate around the connection part with the base plate. The connecting spring is set in conjunction with the measuring frame to form a certain elastic driving force on the measuring frame. When the elastic measuring frame is installed with the frame, under the action of this elastic driving force, the top of the measuring frame can be pre-pressed on the outermost conveyor belt of the drum in the drum mechanism, and can swing synchronously with the change of the winding diameter of the conveyor belt on the drum to maintain the pre-pressed state of the outermost conveyor belt of the drum mechanism. The speed sensor is mounted on the elastic measuring frame and can directly contact the outermost conveyor belt of the drum under the drive of the elastic measuring frame to measure the real-time belt speed of the conveyor belt during the winding and unwinding operation. The tilt sensor is also mounted on the corresponding elastic measuring frame, which can measure the tilt angle formed synchronously with the change of the winding diameter of the conveyor belt on the drum in real time. The control mechanism measures the belt speed of the outermost conveyor belt and the winding / unwinding angle of the conveyor belt relative to the drum in real time through a measuring component. The measuring component measures the belt speed of the outermost conveyor belt and the winding / unwinding angle of the conveyor belt relative to the drum in a fixed-point manner. The winding / unwinding angle is the angle between the winding conveyor belt and the redirection component, and the diameter of the conveyor belt wound on the drum is accurately determined based on this angle value. The control mechanism adjusts the working state of the drive mechanism in real time according to the measured belt speed of the outermost conveyor belt and the diameter of the winding conveyor belt, so as to control the conveyor belt to maintain a constant belt speed during the winding or unwinding process.

2. The belt take-up and unwinding device for a continuous belt conveyor according to claim 1, characterized in that, The control mechanism determines the control value of the current conveyor belt linear speed by collecting the diameter of the coiled conveyor belt during the winding and unwinding process, and controls the output speed of the drive mechanism by comparing it with the measured current outermost conveyor belt speed, thereby controlling the conveyor belt linear speed.

3. The belt take-up and unwinding device for a continuous belt conveyor according to claim 2, characterized in that, The control mechanism synchronously collects the rate of change of the output torque of the drive mechanism, determines the tension at this moment, and controls the tension by adjusting the output speed of the drive mechanism.

4. The belt take-up and unwinding device for a continuous belt conveyor according to claim 1, characterized in that, The belt take-up and unwinding device also includes a reversing component, which is configured in conjunction with the drum mechanism to constrain the running direction of the conveyor belt.

5. The belt take-up and unwinding device for a continuous belt conveyor according to claim 4, characterized in that, The redirection assembly is composed of multiple sets of redirection rollers.

6. The belt take-up and unwinding device for a continuous belt conveyor according to claim 1, characterized in that, The drive mechanism consists of at least one variable frequency geared motor.

7. The belt take-up and unwinding device for a continuous belt conveyor according to claim 1, characterized in that, The winding mechanism includes a frame, a winding drum, and a bearing housing. The bearing housing is mounted on the frame, and the winding drum is mounted on the frame via the bearing housing.

8. The belt take-up and unwinding device for a continuous belt conveyor according to claim 7, characterized in that, The frame is equipped with wheels that cooperate with the track.

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