A quick-release device and method for a belt conveyor

Abstract

This invention discloses a quick-release device and method for a belt conveyor, belonging to the technical field of belt conveyors. It includes: S1, setting up a drive shaft assembly, a driven shaft assembly, a first force measuring body, a second force measuring body, a quick-release clutch, and a high-precision encoder. The first force measuring body is disposed between the driven bearing seat and the tensioning mechanism of the driven shaft assembly, used to measure the horizontal pressure on the driven side. The second force measuring body is disposed between the split shaft seat of the drive shaft assembly and the limiting block of the side plate, used to measure the horizontal pressure on the drive side. The quick-release clutch is coaxially connected in series between the drive source and the drive shaft, used to engage or disengage power. This invention's quick-release method for belt conveyors, by introducing core components such as a quick-release clutch, a first force measuring body, a second force measuring body, and a high-precision encoder, and combining specific operating steps and calculation logic, achieves accurate diagnosis of the belt condition and auxiliary monitoring of the maintenance process.

Description

Technical Field

[0001] This invention relates to the field of belt conveyors, specifically to a quick-release device and method for belt conveyors. Background Technology

[0002] Currently, during the operation of belt conveyors, belt tension and bearing friction resistance are key factors affecting energy consumption, reliability, and belt life. Traditional belt tension detection typically relies on mechanical rulers or pressure gauges, which have low accuracy and cannot achieve dynamic monitoring. Diagnosing belt friction resistance, such as bearing or roller resistance, often requires complete disassembly of the belt for individual measurement, which is time-consuming and cannot be performed while the conveyor is in operation. Furthermore, during the hoisting and maintenance of the drive shaft assembly, the heavy equipment can easily cause shaft tilting or jamming, leading to shaft damage, and there is a lack of effective real-time monitoring and early warning methods. Therefore, how to achieve accurate on-machine diagnosis of belt condition and auxiliary monitoring during maintenance has become an urgent problem to be solved in this field.

[0003] The information disclosed in the background section above is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-release device and method for belt conveyors to solve the problems mentioned in the background art.

[0005] The technical solution of the present invention includes:

[0006] S1. A drive shaft assembly, a driven shaft assembly, a first force measuring body, a second force measuring body, a quick-release clutch, and a high-precision encoder are provided. The first force measuring body is located between the driven bearing housing and the tensioning mechanism of the driven shaft assembly and is used to measure the horizontal pressure on the driven side. The second force measuring body is located between the split shaft housing and the limiting block of the side plate of the drive shaft assembly and is used to measure the horizontal pressure on the drive side. The quick-release clutch is coaxially connected in series between the drive source and the drive shaft and is used to engage or disengage power. The high-precision encoder is connected to the drive shaft and is used to measure the angular velocity of the drive shaft.

[0007] S2. When the quick-release clutch is in the disengaged state, read the data of the first force measuring body and the second force measuring body, and adjust the tensioning mechanism until the tension on both sides is balanced and the total tension meets the standard, thus completing the static tension calibration.

[0008] S3. Engage the quick-release clutch. After the drive belt runs stably, instantly disengage the quick-release clutch to allow the drive shaft assembly to decelerate freely.

[0009] S4, during the free deceleration of the driving shaft assembly, the angular velocity decay curve is recorded by the high-precision encoder at high frequency, and the system free deceleration angular acceleration is calculated, wherein the total moment of inertia of the driving shaft, bearing and drum is pre-stored in the controller, and the total rolling friction torque is converted according to the system free deceleration angular acceleration and the total moment of inertia;

[0010] S5, comparing the total rolling friction torque with the new belt health reference friction torque stored in the controller to diagnose the belt state.

[0011] Preferably, S2 further comprises:

[0012] Summing up the pressure data of all first and second force measuring bodies to obtain the total static tension of the belt;

[0013] Comparing the sum of the first and second force measuring body data on the left side with the sum of the first and second force measuring body data on the right side to obtain the left-right load deviation value;

[0014] Adjusting the tensioning mechanism according to the total static tension and the left-right load deviation value.

[0015] Preferably, the quick-release clutch is a pneumatic normally open conical friction clutch;

[0016] S3 separates the quick-release clutch, specifically: the cylinder of the pneumatic normally open conical friction clutch is disconnected to make the spring reset and separate the cone.

[0017] Preferably, the new belt health reference friction torque is the initial reference value measured and stored after the new belt is first installed and the static tension calibration of S2 is completed.

[0018] Preferably, it further comprises a maintenance auxiliary step:

[0019] When the quick-release clutch is in the separated state, the pressure data of the second force measuring bodies on both sides of the driving side are continuously read at high frequency;

[0020] The difference pressure value between the readings of the two second force measuring bodies is calculated, and the real-time tilting torque is converted according to the difference pressure value and the known fixed horizontal distance between the two second force measuring bodies;

[0021] The real-time tilting torque is compared with the preset maximum allowable tilting torque threshold of the shaft seat, and an alarm is triggered when the real-time tilting torque exceeds the threshold.

[0022] A quick-release device for a belt conveyor comprises:

[0023] The main frame comprises side plates;

[0024] The driven shaft assembly is installed at the driven end of the side plate;

[0025] drive shaft assembly, installed at the driving end of the side plate;

[0026] first force measuring body, arranged between the driven shaft bearing seat of the driven shaft assembly and the tensioning mechanism;

[0027] second force measuring body, arranged between the split shaft seat of the drive shaft assembly and the limiting block of the side plate;

[0028] quick-release clutch, coaxially connected in series between the driving source and the drive shaft of the drive shaft assembly;

[0029] high-precision encoder, connected to the drive shaft;

[0030] controller, electrically connected with the first force measuring body, the second force measuring body, the quick-release clutch and the high-precision encoder respectively.

[0031] Preferably, the quick-release clutch is a pneumatic normally open conical friction clutch, which has an annular air cylinder built-in, and is engaged when air is supplied and separated by spring reset when air is cut off.

[0032] Preferably, the first force measuring body and the second force measuring body are both high-rigidity pads with built-in pressure sensing elements.

[0033] Preferably, the driven end of the side plate is provided with a driven opening; the driven shaft bearing seat of the driven shaft assembly is accommodated in the driven opening; and a T-shaped pressing block is further included, which is bridged on the top of the driven opening and presses down the driven shaft bearing seat through a fastening bolt.

[0034] Preferably, the driving end of the side plate is provided with a driving opening with a cover; the split shaft seat of the drive shaft assembly is composed of a lower shaft seat and an upper shaft seat cover, and the lower shaft seat is fixed to the lower semicircular edge of the driving opening with a cover.

[0035] The present application provides a quick-release device and method for a belt conveyor by improvement, which has the following improvements and advantages compared with the prior art:

[0036] 1. The quick-release method for the belt conveyor of the present application realizes accurate diagnosis of the belt state and auxiliary monitoring of the maintenance process by introducing core components such as the quick-release clutch, the first force measuring body, the second force measuring body and the high-precision encoder, and combining specific operation steps and calculation logic, and through the instantaneous separation function of the quick-release clutch, the interference of the driving source is excluded, so that the data captured by the high-precision encoder during the free deceleration of the drive shaft assembly only reflects the total rolling friction torque of the system itself;

[0037] 2. The torque is compared with the new healthy reference friction torque, the initial reference value after installation calibration, to objectively judge whether the belt is in an over-tightened, insufficient tension or serious deviation state, greatly improving the accuracy and scientificity of the diagnosis. Comparing the torque with the new healthy reference friction torque, the initial reference value after the first installation calibration, can objectively judge whether the belt is in an over-tightened, insufficient tension or serious deviation state, greatly improving the accuracy and scientificity of the diagnosis.

[0038] 3. When the quick release clutch is in the separated state, the second force body data on both sides of the driving side is continuously read to monitor the posture of the driving shaft during hoisting, the difference pressure value between the readings of the two second force bodies is calculated, and the known fixed horizontal distance between the two second force bodies is multiplied to convert the real-time tilting torque, which is compared with the preset maximum allowable tilting torque threshold of the shaft seat, and an alarm is triggered when the threshold is exceeded. This function effectively prevents damage to the shaft seat caused by tilting or jamming during hoisting and maintenance, ensuring the safety and efficiency of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0039] The application will be further explained below in conjunction with the drawings and examples:

[0040] Figure 1 is a schematic diagram of the overall structure of the device;

[0041] Figure 2 is a schematic diagram of the driven shaft assembly and its connection structure;

[0042] Figure 3 is a schematic diagram of the driving shaft assembly and its connection structure;

[0043] Figure 4 is a schematic diagram of the driving opening structure;

[0044] Figure 5 is a schematic diagram of the method flow structure of the application.

[0045] In the figure: 100, side plate; 110, driven opening; 120, driving opening; 200, driven shaft assembly; 210, driven bearing seat; 220, T-shaped pressing block; 230, first force body; 240, tensioning mechanism; 300, driving shaft assembly; 310, split shaft seat; 320, second force body; 330, quick release clutch; 340, high-precision encoder. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the application will be further described in detail below in conjunction with specific examples.

[0047] Example 1

[0048] Referring to Figures 1-5 The application provides a quick release method of a belt conveyor, comprising:

[0049] S1, setting a driving shaft assembly, a driven shaft assembly, a first load cell, a second load cell, a quick release clutch and a high-precision encoder, wherein the first load cell is arranged between the driven shaft bearing seat and the tensioning mechanism of the driven shaft assembly for measuring the horizontal pressure on the driven side, the second load cell is arranged between the split shaft seat of the driving shaft assembly and the limiting block of the side plate for measuring the horizontal pressure on the driving side, the quick release clutch is coaxially connected in series between the driving source and the driving shaft for engaging or separating power, and the high-precision encoder is connected to the driving shaft for measuring the angular velocity of the driving shaft;

[0050] The first load cell is arranged between the left and right driven shaft bearing seats and the tensioning mechanism of the driven shaft assembly for measuring the horizontal pressure on the left and right sides of the driven side, the second load cell is arranged between the left and right split shaft seats of the driving shaft assembly and the limiting block of the side plate for measuring the horizontal pressure on the left and right sides of the driving side, and a total of four load cells (the first load cell and the second load cell) are arranged.

[0051] S2, when the quick release clutch is in the separated state, the data of the first load cell and the second load cell are read, and the tensioning mechanism is adjusted until the tension on both sides is balanced and the total tension meets the standard, and the static tension calibration is completed;

[0052] S3, the quick release clutch is engaged, and after the driving belt is stably operated, the quick release clutch is separated instantaneously, so that the driving shaft assembly is free to decelerate;

[0053] S4, during the free deceleration of the driving shaft assembly, the angular velocity attenuation curve is recorded at a high frequency through the high-precision encoder, and the system free deceleration angular acceleration is calculated, wherein the total moment of inertia of the driving shaft, the bearing and the drum is pre-stored in the controller, and the total rolling friction torque is converted according to the system free deceleration angular acceleration and the total moment of inertia.

[0054] S5, the total rolling friction torque is compared with the new belt health reference friction torque stored in the controller to diagnose the state of the belt.

[0055] The new belt health reference friction torque is a quantitative health index for representing the rolling friction torque of the belt conveyor system in the ideal initial state of a new and static tension calibration standard, and is a core logical judgment basis for judging whether the system running resistance is abnormal.

[0056] The application provides a quick release method of a belt conveyor, first force measuring bodies and second force measuring bodies provided through S1, which provide data sources for real-time acquisition of horizontal pressures of driving sides and driven sides. A static tension calibration step of S2 uses the pressure data to guide adjustment of a tensioning mechanism, so as to realize balance of tensions of two sides and standardization of total tension, and ensure that the belt runs under uniform force. In the diagnosis of friction, the instantaneous separation function of the quick release clutch in S3 realizes complete isolation of the rotational inertia and braking torque of a driving source from a driving shaft assembly, which is a prerequisite for obtaining pure system friction data.

[0057] During the free deceleration of the driving shaft assembly in S3, the angular velocity decay curve captured by the high-precision encoder in S4 reflects the energy dissipation process caused only by the internal friction of the system; a controller, such as a Siemens S7-1200 series PLC, combines the pre-stored total rotational inertia to convert the slope of the decay curve, i.e., the angular acceleration, into the total rolling friction torque through calculation.

[0058] The conversion of the total rolling friction torque of the system during the free deceleration is realized based on a simplified rotational dynamics model. The purpose of the model is to accurately invert the total rolling friction torque causing the kinematic decay of the driving shaft assembly under no external driving torque input into the kinematic decay state of the driving shaft assembly;

[0059] The model represents the kinetic energy dissipation process of the driving shaft assembly, i.e., the friction torque acting on the system with total rotational inertia to cause angular velocity decay , thereby following the form of Newton's second law in rotational motion;

[0060] The conversion logic follows the basic principles of rotational dynamics . Step 1, data acquisition: the controller receives the instantaneous angular velocity series data of the driving shaft during free deceleration recorded by the high-precision encoder at a high-frequency sampling period, such as 1ms sampling interval. Step 2, angular acceleration calculation: the controller performs numerical time differentiation or difference calculation of adjacent time points on the angular velocity data series to obtain the real-time value or average value of the free deceleration angular acceleration of the system. Step 3, friction torque conversion: the controller multiplies the calculated free deceleration angular acceleration of the system with the total rotational inertia of the driving shaft, bearing and drum pre-stored in the controller, thereby inversely calculating the total rolling friction torque in real time, which represents the total friction resistance of the system itself;

[0061] The conversion logic is based on the principles of rotational dynamics wherein, : represents the total rolling friction torque, i.e. the diagnostic result to be obtained; : represents the total moment of inertia of the drive shaft, bearings and the drum, pre-stored in the controller; : represents the real-time system free deceleration angular acceleration calculated from the high-precision encoder data.

[0062] Specifically, the controller first takes the time derivative of the angular velocity data series collected by the high-precision encoder during free deceleration, or performs difference calculation at discrete time points, to obtain the real-time system free deceleration angular acceleration ; since the system is in the free deceleration state of the fast disengaging clutch at this time, the inertia of the drive source has been excluded, and the only consumption of the kinetic energy of the drive shaft assembly is the total rolling friction torque of the system ; the pre-stored total moment of inertia in the controller represents the sum of the moments of inertia of all rotating parts including the drive shaft, bearings and the drum, which is a fixed value calibrated before the device is shipped; therefore, the controller can obtain the total rolling friction torque corresponding to the angular acceleration by multiplying the measured angular acceleration and the fixed total moment of inertia ;

[0063] The comparative diagnosis step S5 compares the real-time torque with the new belt health reference friction torque, so as to objectively judge whether the belt is in the state of excessive tension, insufficient tension or serious deviation, and provides data support for maintenance; for example, if the measured total rolling friction torque is significantly higher than the health reference friction torque, it indicates that the rolling resistance of the system increases, and this increased resistance may be caused by bearing damage or excessive tension of the belt adjusted by the tensioning mechanism; further, if the high friction torque is accompanied by the large static left-right load difference found in S2 calibration, it is highly indicative of the belt having serious deviation, resulting in additional sliding friction between the belt edge and non-rolling parts such as side plates or roller supports, thereby causing a dramatic increase in the total friction torque.

[0064] When the difference between the measured total rolling friction torque and the new belt health reference friction torque exceeds a certain pre-set friction torque change threshold, the state will be used as a logical trigger signal to make the controller immediately output an alarm or maintenance prompt, thereby starting the next maintenance action or further fault diagnosis process;

[0065] Also includes:

[0066] Summing up the pressure data of all first and second force bodies to obtain the total static tension of the belt;

[0067] Summing up the pressure data of the two first force sensors and the two second force sensors on the left and right sides;

[0068] Comparing the sum of the first force sensor and the second force sensor data on the left side with the sum of the first force sensor and the second force sensor data on the right side to obtain the left-right load imbalance difference value;

[0069] Adjusting the tensioning mechanism according to the total static tension and the left-right load imbalance difference value.

[0070] In the embodiment, the static tension calibration of S2 involves quantification and balancing of the tension. The controller reads the pressure data of the four first force sensors and the four second force sensors on the driven side and the driving side in real time; the calculation of summing up the pressure data of all the first force sensors and the second force sensors is automatically completed by the controller, which is used to obtain the total static tension of the belt, which is used to judge whether the pre-tightening degree of the belt as a whole reaches the preset process value; at the same time, the controller compares the sum of the first force sensor and the second force sensor data on the left side with the sum of the first force sensor and the second force sensor data on the right side to calculate the left-right load imbalance difference value. The specific calculation logic of the left-right load imbalance difference value is as follows: the controller adds the left first force sensor reading and the left second force sensor reading to obtain the total tension on the left side; at the same time, the controller adds the right first force sensor reading and the right second force sensor reading to obtain the total tension on the right side. Then, the controller subtracts the total tension on the left side from the total tension on the right side, or vice versa, and takes the absolute value, which is the left-right load imbalance difference value, which directly reflects the degree of imbalance of the tension on the two sides of the belt; according to the total static tension and the left-right load imbalance difference value, the controller can prompt the operator or automatically control the tensioning mechanism, for example, by controlling the servo motor connected to the adjusting screw to adjust until the tension on both sides is balanced and the total tension meets the standard, which provides a standardized initial condition for the subsequent dynamic friction diagnosis.

[0071] The quick-release clutch is a pneumatic normally open conical friction clutch;

[0072] In S3, the quick-release clutch is instantaneously separated, specifically: the cylinder of the instruction pneumatic normally open conical friction clutch is disconnected, the spring is reset to separate the conical surfaces.

[0073] In this embodiment, the specific structure of the quick-release clutch is selected as a pneumatic normally open conical friction clutch. The purpose of selecting this clutch is its normally open characteristic and fast response capability. It has a built-in annular cylinder. When the belt needs to be driven to run stably in S3, the controller instructs the cylinder to be aerated to overcome the built-in spring force, so that the inner cone male disc and the outer cone female disc are pressed tightly to engage, thereby transmitting power. The key action of instantaneously separating the quick-release clutch in S3 is to control the cylinder of the pneumatic normally open conical friction clutch to be de-aerated. Because the air pressure is not maintained, the reset spring inside will immediately push the conical surface apart, achieving a quick interruption of power transmission. This spring reset method ensures the instantaneous nature of the separation action, creating the necessary physical conditions for the high-precision encoder to record pure free deceleration data.

[0074] The new belt health reference friction torque is the initial reference value measured and stored by performing steps S3 and S4 after the new belt is first installed and the static tension calibration in S2 is completed.

[0075] The new belt health reference friction torque for comparison in S5 is obtained in a way that reflects the idea of calibration rather than relying on theoretical calculation. The source of this reference is that when the new belt is first installed and debugged, the operator must complete the static tension calibration in S2 to ensure that the total tension of the new belt and the left-right balance meet the preset standards. Under this standard tension condition, the controller automatically performs steps S3 of stable running and instantaneous separation and S4 of free deceleration data acquisition and friction torque conversion. The total rolling friction torque calculated in S4 this time is defined as the initial reference value of the belt system under new and ideal tension, and is stored in the controller. This way of actual measurement calibration makes the reference value truly reflect the initial friction characteristics of the entire system including bearings and rollers, providing a guarantee for the accuracy of subsequent S5 diagnosis.

[0076] It also includes maintenance assistance steps:

[0077] When the quick-release clutch is in the separated state, the pressure data of the second force bodies on both sides of the drive side is continuously read at high frequency;

[0078] The differential pressure value between the readings of the two second force bodies is calculated, and the real-time tilting torque is converted according to the known fixed horizontal distance between the two second force bodies and the differential pressure value;

[0079] The real-time tilting torque is compared with the preset maximum allowable tilting torque threshold of the shaft seat, and an alarm is triggered when the real-time tilting torque exceeds the threshold.

[0080] This threshold is directly related to the mechanical safety limit for preventing the shaft seat from being permanently deformed or structurally damaged due to uneven stress during lifting or maintenance, providing an upper limit for the alarm logic of the maintenance assistance steps;

[0081] A quick release method of belt conveyor further comprises a maintenance assistance step, which monitors the posture of the driving shaft assembly during hoisting maintenance to prevent jamming, and is started when the controller receives a maintenance instruction and confirms that the quick release clutch is in the disengaged state. During the process of hoisting the driving shaft by the maintenance personnel, the controller continuously reads the pressure data of the two second load cells on both sides of the driving side at a high frequency. Normally, the readings on both sides should decrease uniformly. If the driving shaft is tilted due to the weight of the driving source, the readings on both sides will be unbalanced. The controller immediately calculates the differential pressure value between the readings of the two second load cells, and according to the known fixed horizontal distance between the two second load cells, which is a pre-stored device geometric parameter, the real-time tilting torque is calculated by torque conversion;

[0082] The conversion logic is based on the definition of torque . Step 1, differential pressure calculation: the controller reads the second load cell readings on the left side of the driving side and the second load cell readings on the right side at a high frequency, and calculates the differential pressure value between the two readings ; the differential pressure value represents the unbalanced vertical pressure component caused by the tilting of the driving shaft assembly; Step 2, torque conversion: the controller multiplies the unbalanced differential pressure value by a known fixed horizontal distance between the two second load cells representing the force arm, which is pre-stored in its internal , and the product is converted into the real-time tilting torque trying to overturn the split shaft seat; Step 3, alarm judgment: the controller compares the real-time tilting torque with the preset'maximum allowable tilting torque threshold of the shaft seat' to trigger an alarm;

[0083] The controller then compares the real-time tilting torque with the preset maximum allowable tilting torque threshold of the shaft seat. The conversion logic is as follows: the controller first calculates the differential pressure value between the readings of the two second load cells, i.e. the reading of one second load cell minus the reading of the other second load cell, which represents the unbalanced vertical pressure component caused by the tilting of the driving shaft assembly. Then, the controller multiplies the unbalanced differential pressure value by a known fixed horizontal distance between the two second load cells representing the force arm, which is a device geometric parameter, and the product is converted into the real-time tilting torque trying to overturn the split shaft seat; and when the real-time tilting torque exceeds the threshold safety margin, an audible and visual alarm is triggered to prompt the operator that the driving shaft has a risk of jamming and must first eliminate the tilting torque before continuing operation.

[0084] The maximum allowable tilting torque threshold of the axle seat is a torque value corresponding to the maximum allowable torsion / tilting stress determined in advance according to the material strength, geometric size and safety factor of the split axle seat of the drive axle assembly and the connecting bolts thereof through finite element analysis or theoretical mechanics calculation.

[0085] Embodiment 2

[0086] Please refer to Figures 1-4 A quick release device of a belt conveyor, comprising:

[0087] A main frame comprising side plates;

[0088] A driven axle assembly installed at the driven end of the side plates;

[0089] A drive axle assembly installed at the drive end of the side plates;

[0090] A first force measuring body arranged between the driven axle bearing seat of the driven axle assembly and the tensioning mechanism;

[0091] A second force measuring body arranged between the split axle seat of the drive axle assembly and the limiting block of the side plates;

[0092] A quick release clutch coaxially connected in series between the driving source and the drive shaft of the drive axle assembly;

[0093] A high-precision encoder connected to the drive shaft;

[0094] A controller electrically connected to the first force measuring body, the second force measuring body, the quick release clutch and the high-precision encoder respectively.

[0095] A quick release device of a belt conveyor; the device comprises: a main frame comprising side plates as a bearing base; a driven axle assembly installed at the driven end of the side plates; a drive axle assembly installed at the drive end of the side plates; a first force measuring body arranged between the driven axle bearing seat of the driven axle assembly and the tensioning mechanism for sensing the tension on the driven side; a second force measuring body arranged between the split axle seat of the drive axle assembly and the limiting block of the side plates for sensing the tension on the drive side; a quick release clutch coaxially connected in series between the driving source and the drive shaft of the drive axle assembly, which functions to separate power on command; a high-precision encoder, such as a P+F encoder, connected to the drive shaft for accurately measuring the angular velocity of the drive shaft; a controller, such as an ADAM series industrial controller, electrically connected to the first force measuring body, the second force measuring body, the quick release clutch and the high-precision encoder respectively. The controller uniformly coordinates the components to perform S2 tension data acquisition and calibration, S3 clutch separation control, S4 encoder data processing and friction torque conversion, and S5 diagnostic comparison and maintenance auxiliary alarm.

[0096] The quick release clutch is a pneumatic normally open conical friction clutch with an annular cylinder built-in, which is engaged when air is supplied and separated by spring reset when air is cut off.

[0097] In a specific embodiment of the device, the structure of the quick-release clutch is selected as a pneumatic normally open conical friction clutch. The built-in annular cylinder of the clutch receives the instructions of the controller; when the air is on, the air pressure pushes its friction cone to engage, to transmit power in the initial stage of S3; when S3 needs to be separated instantaneously, the controller instructs the air to be cut off, at which time the clutch is separated by the spring reset inside it; this design relying on spring reset to achieve separation ensures the rapidity and reliability of the separation action, which is the key structure to realize the pure free deceleration data collection in S4.

[0098] The first force body and the second force body are both high-rigidity pads with built-in pressure sensing elements.

[0099] To realize the tension calibration in S2 and the monitoring of the tilting torque in the auxiliary step of maintenance, the structure of the first force body and the second force body is determined in an embodiment. They are both pressure sensors in the form of high-rigidity pads, such as the high-rigidity pressure sensor of Mettler-Toledo; the purpose of adopting high-rigidity design is to withstand huge belt tension without obvious deformation when they are installed between the driven bearing seat and the tensioning mechanism, or between the split bearing seat and the limit block, ensuring the accuracy of measurement; the built-in pressure sensing elements, such as strain gauges solidified inside the pad, are responsible for converting the sensed horizontal pressure into an electrical signal and transmitting it to the controller for calculation in S2 and S5.

[0100] The driven end of the side plate is provided with a driven opening; the driven bearing seat of the driven shaft assembly is accommodated in the driven opening; and a T-shaped pressing block is further included, which is bridged on the top of the driven opening and presses down the driven bearing seat through a fastening bolt.

[0101] To cooperate with the tension adjustment and daily maintenance in S2, the driven end of the side plate adopts a structure convenient for adjustment and disassembly, and the side plate is provided with a driven opening at this position; the driven bearing seat of the driven shaft assembly is accommodated in the driven opening, and its bottom cooperates with the bottom of the U-shaped groove to enable it to move in the horizontal direction under the push of the tensioning mechanism. The device further includes a T-shaped pressing block; after the tension adjustment in S2 is completed, the T-shaped pressing block is bridged on the top of the driven opening, and the operator tightens the fastening bolt passing through the T-shaped pressing block to press down the T-shaped pressing block, which in turn firmly presses and locks the driven bearing seat in the U-shaped groove to withstand the belt tension.

[0102] The driving end of the side plate is provided with a driving opening with a cover; the split bearing seat of the driving shaft assembly is composed of a lower bearing seat and an upper bearing seat cover, and the lower bearing seat is fixed to the lower semicircular edge of the driving opening with a cover.

[0103] The driving end of the side plate is a lifting device for assisting installation and maintenance of the driving shaft, and is provided with a driving opening with a cover. The driving opening is upwardly open. The split shaft seat of the driving shaft assembly is provided with a structure matched with the slot, and is composed of a lower shaft seat and an upper shaft seat cover. The lower shaft seat is fixed to the lower semicircular edge of the driving opening, and is used for bearing the vertical weight of the driving shaft during operation of the equipment. The upper shaft seat cover is covered on the lower shaft seat through fastening members such as fast locking bolts with T-shaped handles, and covers the driving bearing together. When the driving shaft needs to be lifted out for performing the maintenance assisting step, the operator only needs to remove the upper shaft seat cover, so that the driving shaft assembly can be taken out upwardly from the driving opening. Meanwhile, the second force body provides anti-stuck tilt monitoring during the process.

[0104] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A quick release method for a belt conveyor, characterized by, Comprise: S1, set drive shaft assembly (300), driven shaft assembly (200), the first force body (230), the second force body (320), quick release clutch (330) and high-precision encoder (340), wherein the first force body (230) is set between the driven bearing seat (210) and the tensioning mechanism (240) of driven shaft assembly (200), for measuring the horizontal pressure on the driven side, the second force body (320) is set between the split shaft seat (310) of drive shaft assembly (300) and the limiting block of side plate (100), for measuring the horizontal pressure on the drive side, quick release clutch (330) is coaxial in series between the driving source and the drive shaft, for power connection or separation, high-precision encoder (340) is connected to the drive shaft, for measuring the angular velocity of the drive shaft; S2, when quick release clutch (330) is in the separation state, read the data of the first force body (230) and the second force body (320), and adjust the tensioning mechanism (240), until the tension on both sides is balanced and the total tension is up to standard, complete static tension calibration; S3, engage quick release clutch (330), drive belt stable operation, then separate quick release clutch (330) instantaneously, so that drive shaft assembly (300) is free to decelerate; S4, during the free deceleration of drive shaft assembly (300), the angular velocity attenuation curve is recorded by high-frequency high-precision encoder (340), and the system free deceleration angular acceleration is calculated, wherein the total moment of inertia of the drive shaft, bearing and drum is pre-stored in the controller, and the total rolling friction torque is converted according to the system free deceleration angular acceleration and the total moment of inertia; S5, compare the total rolling friction torque with the new belt health reference friction torque stored in the controller to diagnose the belt status; In S2, also include: Sum all the pressure data of the first force body (230) and the second force body (320) to get the total static tension of the belt; Compare the sum of the data of the first force body (230) and the second force body (320) on the left side with the sum of the data of the first force body (230) and the second force body (320) on the right side to get the left-right load difference; Adjust the tensioning mechanism (240) according to the total static tension and the left-right load difference; Quick release clutch (330) is a pneumatic normally open conical friction clutch; In S3, the quick release clutch (330) is separated instantaneously, specifically: the cylinder of the pneumatic normally open conical friction clutch is disconnected to make the spring reset and separate the cone.

2. A quick release method for a belt conveyor as claimed in claim 1, characterized in that, The new belt health reference friction torque is the initial reference value measured and stored after the new belt is installed for the first time and the static tension calibration of S2 is completed.

3. A quick release method for a belt conveyor as claimed in claim 1, wherein, Also include maintenance auxiliary steps: When quick release clutch (330) is in the separation state, high-frequency continuously read the pressure data of the second force body (320) on both sides of the drive side; Calculate the differential pressure value between the readings of the two second force bodies (320), and convert the real-time tilting torque according to the known fixed horizontal distance between the two second force bodies (320) and the differential pressure value. The real-time tilting torque is compared with a preset maximum allowable tilting torque threshold of the shaft seat, and an alarm is triggered when the real-time tilting torque exceeds the threshold.

4. A quick release device for a belt conveyor, applied to the quick release method for a belt conveyor according to any one of claims 1 to 3, characterized in that, The utility model relates to a kind of quick-release tilting mechanism, comprising: Main frame, including side plate (100); Driven shaft assembly (200), is installed in the driven end of side plate (100); Driving shaft assembly (300), is installed in the driving end of side plate (100); First force body (230), is arranged between driven bearing seat (210) of driven shaft assembly (200) and tensioning mechanism (240); Second force body (320), is arranged between split shaft seat (310) of driving shaft assembly (300) and the limiting block of side plate (100); Quick-release clutch (330), coaxial series in driving source and the drive shaft of driving shaft assembly (300); High-precision encoder (340), is connected to drive shaft; Controller, respectively with first force body (230), second force body (320), quick-release clutch (330) and high-precision encoder (340) electric connection.

5. A quick release device for a belt conveyor as claimed in claim 4, wherein, Quick-release clutch (330) is pneumatic normally open conical friction clutch, its built-in annular cylinder is engaged when aeration, and is separated by spring reset when gas is disconnected.

6. A quick release device for a belt conveyor as claimed in claim 4, wherein, First force body (230) and second force body (320) are high-rigidity pad with built-in pressure sensing element.

7. A quick release device for a belt conveyor as claimed in claim 4, wherein, Driven opening (110) is opened in the driven end of side plate (100);Driven bearing seat (210) of driven shaft assembly (200) is contained in driven opening (110);Further including T type pressing block (220), T type pressing block (220) is bridged on the top of driven opening (110), and driven bearing seat (210) is pressed down by fastening bolt.

8. A quick release device for a belt conveyor as claimed in claim 4, wherein, Driving opening (120) with cover is opened in the driving end of side plate (100);Split shaft seat (310) of driving shaft assembly (300) is made of lower shaft seat and upper shaft seat cover, and lower shaft seat is fixed to the lower semicircular edge of driving opening (120) with cover.

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