Rapid replacement method of annular conveying belt sample

Abstract

The invention relates to the technical field of annular conveying belt samples, in particular to a rapid replacement method of an annular conveying belt sample, which comprises the following steps: S1, a driven roller moves towards one side of a driving roller to loosen the driving roller; s2, moving the annular conveying belt to the front side; s3, a lifting oil cylinder is lifted to be tightly attached to the lower side of the movable rack; s4, the connecting support and the first support are dismounted; s5, the annular conveying belt is taken out from the front side, and a new to-be-detected annular conveying belt is arranged in the annular conveying belt in a sleeving mode; s6, the connecting support and the first support are installed back to the original position; s7, the lifting oil cylinder is controlled to descend to a low position; s8, sleeving a new to-be-detected annular conveying belt to the middle parts of the driven roller and the driving roller; and S9, displacing the driven roller towards one side far away from the driving roller to reach a test position. By adopting the method, the working efficiency of the test and the uniformity of key parameter control in the test can be greatly improved, the repeatability is good, and the accuracy of the final test result can be remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of annular conveyor belt sample technology, and more specifically to a method for rapid replacement of annular conveyor belt samples. Background Technology

[0002] Belt conveyors are widely used in ports, coal mines, building materials industries, and chemical industries to transport various solid lumps and powders. Due to long conveying distances, large material flows, and high usage frequency, conveying systems consume a significant amount of energy during operation. This energy consumption primarily stems from the indentation and rolling resistance of the conveyor belt during operation, which originates from the wear and deformation of the belt as it passes over idlers. To promote the green development and energy conservation of conveyor belts, international standards and standards in some countries have clearly defined various performance requirements for conveyor belts and established corresponding test methods. Conveyor belt indentation and rolling resistance is one of the most important testing indicators. For conveyor belts to be used in the EU and other developed countries, a test report is required. Therefore, the research and application of conveyor belt indentation and rolling resistance testing is crucial.

[0003] Currently, international testing standards for conveyor belts include ISO 23586-2022, which specifies requirements and test standards for indentation rolling resistance related to belt width. The test indicators include: the maximum tension force exerted on the conveyor belt by the passive roller, the vertical pressure exerted on the conveyor belt by the test roller, and the horizontal resistance generated by the conveyor belt on the test roller. This horizontal resistance is typically measured by force sensors at both ends of the test roller, and the average of these two measurements is the main measurement parameter F for indentation resistance. M，h The rotational resistance of the test rollers must also be measured using a static torque sensor. To ensure accuracy, when testing at least the same type of circular conveyor belt, the maximum tension, vertical pressure, and other parameters must be adjusted consistently after each disassembly and reassembly.

[0004] Therefore, the following technical problems arise when using the current testing device: 1. When disassembling and installing the circular conveyor belt, multiple test rollers and their related sensors need to be repeatedly disassembled, assembled, and adjusted. This is not only cumbersome and inefficient, but also affects the stability of the sensor connections and further impacts the accuracy of the test. 2. The test rollers and their related sensors are highly sensitive components. Each time a circular conveyor belt to be tested is replaced, it needs to be disassembled, assembled, and adjusted. Each operation cannot guarantee the uniformity of the adjustment accuracy, resulting in poor repeatability and directly affecting the test accuracy. Summary of the Invention

[0005] This invention provides a method for quickly changing samples of annular conveyor belts to solve the aforementioned background technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A rapid assembly method for annular conveyor belt samples is disclosed using an annular conveyor belt sample testing machine. The machine includes a passive roller and a driving roller respectively mounted on the left and right sides of a movable frame. The annular conveyor belt is mounted on the passive roller and the driving roller. The front and rear ends of the passive roller are adjustable and fixed to the movable frame via movable parts. A hanger is provided on the rear side of the movable frame, and the hanger, in a "7" shape in its right view, is used to fix the test roller module. The front side of the movable frame is connected to a fixed frame via a detachable connecting bracket. A lifting cylinder is provided below the movable frame, and a first bracket is detachably mounted on the upper front side of the movable frame to support the front side of the hanger. The steps for assembling and disassembling the annular conveyor belt are as follows: S1: The passive roller shifts to the side of the active roller, causing the circular conveyor belt to loosen; S2: Move the annular conveyor belt forward and to the front of the lifting cylinder; S3: Remove the screws of the connecting bracket, and raise the lifting cylinder to fit tightly against the lower side of the movable frame and support the movable frame; S4: Remove the connecting bracket and the first bracket; S5: Take out the annular conveyor belt from the front side and put the new annular conveyor belt to be tested into the front of the lifting cylinder from the front side; S6: Reassemble the connecting bracket and the first bracket back into their original positions; S7: Control the lifting cylinder to descend to a low position, and tighten and fix the connecting bracket and the first bracket; S8: Fit the new annular conveyor belt to be tested onto the middle of the passive roller and the active roller; S9: Displace the passive roller to the side away from the active roller, causing the annular conveyor belt to be taut to the standard value, thus completing the disassembly and assembly of the annular conveyor belt.

[0007] Optionally, the movable component includes a tensioning cylinder, and the front and rear ends of the passive roller are respectively movably mounted on the movable frame via movable brackets; by controlling the extension and retraction of the tensioning cylinder to act on the movable brackets, the left and right displacement of the passive roller is controlled.

[0008] Optionally, a force sensor is provided between the tensioning cylinder and the movable support. The force sensor is used to monitor the tension force on the annular conveyor belt and to control the extension and retraction of the tensioning cylinder.

[0009] Optionally, the movable frame includes a front side plate and a rear side plate, the middle of which is connected by several crossbars; the lifting cylinder is located directly below the crossbars.

[0010] Optionally, before testing the annular conveyor belt, the height of the test roller module is adjusted longitudinally, and the horizontal displacement value of the passive roller is adjusted accordingly to obtain the standard tension of the annular conveyor belt, and the horizontal displacement value is used as the standard value of the horizontal displacement.

[0011] Optionally, when installing the same type of annular conveyor belt to be tested, simply adjust the passive roller to the standard horizontal displacement value to achieve the standard tension of the annular conveyor belt to be tested.

[0012] Optionally, the system also includes a belt alignment system, which includes a belt deviation monitoring device. The belt deviation monitoring device includes guide rollers respectively disposed on the front and rear sides of the annular conveyor belt. The guide rollers are movably mounted on a mounting bracket in the front-rear direction via a linear guide rail assembly and are fixed to the rear side of the movable frame by the mounting bracket. The system also includes a linear displacement sensor, which is used to monitor the displacement of the guide rollers. During monitoring, if the annular conveyor belt deviates in the front-rear direction, it causes the guide rollers to shift, which is then detected by the linear displacement sensor.

[0013] Optionally, during the correction process, once the linear displacement sensor detects a deviation in the annular conveyor belt, the PLC calculates the degree of deviation of the guide roller and controls the tensioning cylinder to slightly increase or decrease oil accordingly. This causes the axis of the passive roller to slightly deviate in the left or right direction, forcing the annular conveyor belt to move in the opposite direction, thereby achieving the correction of the annular conveyor belt.

[0014] Optionally, in step S3, the lifting cylinder is raised to cause the front side of the movable bracket to rise slightly by 0.1-0.5mm and support the movable frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By employing this invention, the test roller module is suspended and fixed using a hanger, and a detachable movable frame is provided. When disassembling and testing the annular conveyor belt to be tested, only the position of the test roller module needs to be adjusted and the horizontal displacement standard value of the passive roller needs to be determined for the first annular conveyor belt to be tested. Subsequently, the disassembly and testing of other annular conveyor belts of the same type or with the same standard does not require disassembly and adjustment of the test roller module, nor does it require any disassembly or assembly of the passive roller and the active roller. It is only necessary to ensure that the passive roller is adjusted to the horizontal displacement standard value to achieve the required test standard. This greatly improves the efficiency of the test and the uniformity of the control of key parameters in the test. It has good repeatability and can significantly improve the accuracy of the final test results. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the lower half of the annular conveyor belt sample testing machine of the present invention; Figure 2 This is a top view of the annular conveyor belt sample testing machine of the present invention; Figure 3 This is a front view of the annular conveyor belt sample testing machine of the present invention; Figure 4 This is a right view of the annular conveyor belt sample testing machine of the present invention; Figure 5 This is a schematic diagram of the structure of the deviation monitoring device of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "inner", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] A rapid assembly method for annular conveyor belt specimens, using an annular conveyor belt specimen testing machine, such as... Figures 1-5 As shown, the annular conveyor belt sample testing machine includes a passive roller 9 and a driving roller 7 respectively installed on the left and right sides of the movable frame 2. The driving roller 7 is mounted on the movable frame 2 via a first bearing seat 8. The annular conveyor belt 13 is installed on the passive roller 9 and the driving roller 7. The front and rear ends of the passive roller 9 are respectively adjustable and fixed to the movable frame 2 in the left and right directions via movable parts. A hanger 18 is provided on the rear side of the movable frame 2. The right view of the hanger 18 is shaped like a "7". The hanger 18 is used to fix the test roller module, that is, the test roller module is suspended on the hanger 18. The front side of the movable frame 2 is connected to the fixed frame 1 via three detachable connecting brackets 6. The rear side of the movable frame 2 and the rear side of the fixed frame 1 can be detachably connected or welded. A lifting cylinder 4 is provided below the movable frame 2. In this embodiment, two sets of lifting cylinders 4 are provided in the left and right directions. Figure 3 As shown, a first support 16 is detachably mounted on the upper front side of the movable frame 2. The first support 16 is used to support the front side of the hanger 18. In this embodiment, the test roller module, such as the first test roller 15, is mounted on the support frame 17 via several adjustable connecting rods and several sensors, such as force sensors. The height of the first test roller 15 can be adjusted via the adjustable connecting rods. The support frame 17 is fixedly connected to the hanger 18 via several hanging rods. The upper part of the first support 16 is detachably connected to the lower part of the support frame 17. The first support 16 can improve the stability of the support frame 17. The steps for disassembling and assembling the annular conveyor belt 13 are as follows: S1: The passive roller 9 moves along one side of the active roller 7, causing the annular conveyor belt 13 to loosen; S2: Move the annular conveyor belt 13 forward and to the front of the lifting cylinder 4. At this time, the telescopic rod of the lifting cylinder 4 is in a low position. S3: Remove all screws 3 of the three connecting brackets 6, and raise the lifting cylinder 4 to fit closely against the lower side of the movable frame 2 and support the movable frame 2. That is, at this time, the rear side of the movable frame 2 is still fixedly connected to the rear side of the fixed frame 1, and the lifting cylinder 4 serves as a support between the front and rear sides of the movable frame 2. S4: Remove the three connecting brackets 6 and the first bracket 16. At this time, there is no longer any obstruction on the front side of the annular conveyor belt 13, and it can be moved out from the front side. S5: Take out the annular conveyor belt from the front side and put the new annular conveyor belt to be tested into the front of the lifting cylinder 4 from the front side; S6: Reassemble the connecting bracket 6 and the first bracket 16 back into their original positions; S7: Control the lifting cylinder 4 to descend to the low position. At this time, the connecting bracket 6 is used as the front support of the movable frame 2 again, and the connecting bracket 6 and the first bracket 16 are tightened and fixed by screws. S8: Fit the new circular conveyor belt to be tested onto the passive roller 9 and the active roller 7; S9: Displace the passive roller 9 along the side away from the active roller 7 to tighten the annular conveyor belt to the standard value, thus completing the disassembly and assembly of the annular conveyor belt.

[0022] Optionally, the movable component includes two tensioning cylinders 12, and the front and rear ends of the passive roller 9 are respectively movably mounted on the movable frame 2 via movable brackets 10; as shown Figures 1-2 As shown, the front and rear ends of the passive roller 9 are respectively mounted on the front and rear movable supports 10 via the second bearing seat 14. The lower part of the two movable supports 10 is respectively equipped with a set of double slider linear guide rail assembly 5. The tensioning cylinder 12 is connected to the movable support 10. By synchronously controlling the extension and retraction of the two tensioning cylinders 12, the two movable supports 10 are respectively acted on, thereby controlling the left and right displacement of the passive roller 9.

[0023] Optionally, a force sensor 11 is provided between the tensioning cylinder 12 and the movable support 10. The force sensor 11 is used to monitor the tension force on the annular conveyor belt and to control the extension and retraction of the tensioning cylinder.

[0024] Optionally, the movable frame 2 includes a front side plate and a rear side plate, and the middle of the front side plate and the rear side plate are connected by several crossbars; the size of the front side plate selected during processing must ensure that the annular conveyor belt can be smoothly removed; the lifting cylinder 4 is located directly below the crossbars, and the telescopic rod of the lifting cylinder 4 lifts upwards and acts on the crossbars to support the movable frame 2.

[0025] Optionally, before testing the annular conveyor belt 13, the height of the test roller module (including all test rollers and their related sensors) is adjusted longitudinally, such as adjusting the first test roller 15, and the horizontal displacement value of the passive roller 9 is matched and adjusted to obtain the standard tension of the annular conveyor belt 13, and the horizontal displacement value is used as the standard value of the horizontal displacement.

[0026] Optionally, when installing the same type of annular conveyor belt 13, it is only necessary to adjust the passive roller 9 to the standard horizontal displacement value to achieve the standard tension of the annular conveyor belt 13. That is, when the same type of annular conveyor belt 13 is tested for the first time, the height of the test roller module has been adjusted to a fixed value. When other annular conveyor belts 13 of the same type or the same test standard are assembled and tested later, there is no need to adjust the test roller module again. In contrast, traditional annular conveyor belt sample testing machines require disassembly and assembly of the test roller module every time the annular conveyor belt 13 is disassembled and assembled. Therefore, adopting this technical solution can ensure the uniformity of the relevant parameters of the test roller module in the test of the same type of annular conveyor belt, improve repeatability, and significantly improve the accuracy of the final test results.

[0027] Optional, it also includes a correction system, such as Figure 2 and Figure 5 As shown, the deviation correction system includes a deviation monitoring device. In this embodiment, the deviation monitoring device includes guide rollers 20 respectively disposed on the front and rear sides of the annular conveyor belt 13. The guide rollers 20 are rotatable and vertically arranged. The two guide rollers 20 are fixed on a support rod 26, and the middle part of the support rod 26 is fixed to the slider of the linear guide assembly 27 by a pressure block 25. A mounting plate 24 is provided on one side of the slider, and a linear displacement sensor 22 is also included. The test rod of the linear displacement sensor 22 is connected to the mounting plate 24. In use, the two guide rollers 20 can be movably disposed on the mounting bracket 21 in the front and rear directions and fixed to the rear side of the movable frame 2 by the mounting bracket 21. The linear displacement sensor 22 is used to monitor the displacement of the guide rollers 20. During monitoring, once the annular conveyor belt 13 deviates in the front and rear directions, it causes the guide rollers 20 to displace, which is detected by the linear displacement sensor 22.

[0028] Optionally, during editing, such as Figure 2 As shown, once the linear displacement sensor 22 detects a deviation in the annular conveyor belt 13, the PLC calculates the degree of deviation of the guide roller and controls the front or rear tension cylinder 12 to slightly increase or decrease oil accordingly. This causes the axis of the passive roller 9 to slightly deviate in the left or right direction, forcing the annular conveyor belt 13 to move in the opposite direction, thereby achieving the correction of the annular conveyor belt 13 during its movement.

[0029] In step S3, the lifting cylinder 4 is lifted to cause the front side of the movable bracket 2 to rise slightly by 0.1-0.5mm, and to support the movable frame 2, so as to facilitate the assembly and disassembly of the three connecting brackets 6.

Claims

1. A rapid assembly method for annular conveyor belt specimens, using an annular conveyor belt specimen testing machine, the annular conveyor belt specimen testing machine comprising a passive roller and a driving roller respectively mounted on the left and right sides of a movable frame, the annular conveyor belt being mounted on the passive roller and the driving roller, characterized in that: The front and rear ends of the passive roller are respectively adjustable and fixed to the movable frame in the left and right directions via movable parts; a hanger is provided on the rear side of the movable frame, and the right view of the hanger is in the shape of a "7", the hanger is used to fix the test roller module; the front side of the movable frame is connected to the fixed frame via a detachable connecting bracket; a lifting cylinder is provided at the bottom of the movable frame, and a first bracket is detachably provided on the upper front side of the movable frame, the first bracket is used to support the front side of the hanger; the steps for disassembling and assembling the annular conveyor belt are as follows: S1: The passive roller shifts to the side of the active roller, causing the circular conveyor belt to loosen; S2: Move the annular conveyor belt forward and to the front of the lifting cylinder; S3: Remove the screws of the connecting bracket, and raise the lifting cylinder to fit tightly against the lower side of the movable frame and support the movable frame; S4: Remove the connecting bracket and the first bracket; S5: Take out the annular conveyor belt from the front side and put the new annular conveyor belt to be tested into the front of the lifting cylinder from the front side; S6: Reassemble the connecting bracket and the first bracket back into their original positions; S7: Control the lifting cylinder to descend to a low position, and tighten and fix the connecting bracket and the first bracket; S8: Fit the new annular conveyor belt to be tested onto the middle of the passive roller and the active roller; S9: Displace the passive roller to the side away from the active roller, causing the annular conveyor belt to be taut to the standard value, thus completing the disassembly and assembly of the annular conveyor belt.

2. The rapid assembly method for a ring conveyor belt sample according to claim 1, characterized in that: The movable component includes a tensioning cylinder, and the front and rear ends of the passive roller are respectively movably mounted on the movable frame via movable brackets; by controlling the extension and retraction of the tensioning cylinder, the left and right displacement of the passive roller is controlled.

3. The rapid assembly method for a ring conveyor belt sample according to claim 2, characterized in that: A force sensor is installed between the tensioning cylinder and the movable support. The force sensor is used to monitor the tension force on the annular conveyor belt and to control the extension and retraction of the tensioning cylinder.

4. The rapid assembly method for an annular conveyor belt sample according to claim 1, characterized in that: The movable frame includes a front side plate and a rear side plate, and the middle of the front side plate and the rear side plate are connected by several crossbars; the lifting cylinder is located directly below the crossbars.

5. The rapid assembly method for a ring conveyor belt sample according to claim 1, characterized in that: Before testing the annular conveyor belt, the height of the test roller module is adjusted longitudinally, and the horizontal displacement value of the passive roller is adjusted accordingly to obtain the standard tension of the annular conveyor belt, and the horizontal displacement value is used as the standard value of the horizontal displacement.

6. The rapid assembly method for an annular conveyor belt sample according to claim 5, characterized in that: When installing the same type of circular conveyor belt to be tested, simply adjust the passive roller to the standard horizontal displacement value to achieve the standard tension of the circular conveyor belt to be tested.

7. The rapid assembly method for a ring conveyor belt sample according to claim 2, characterized in that: It also includes a belt alignment system, which includes a belt deviation monitoring device. The belt deviation monitoring device includes guide rollers respectively disposed on the front and rear sides of the annular conveyor belt. The guide rollers are movably mounted on the mounting bracket in the front-rear direction via a linear guide rail assembly and are fixed to the rear side of the movable frame by the mounting bracket. It also includes a linear displacement sensor, which is used to monitor the displacement of the guide rollers. During monitoring, once the annular conveyor belt deviates in the front-rear direction, it causes the guide rollers to shift, which is then detected by the linear displacement sensor.

8. The rapid assembly method for a ring conveyor belt sample according to claim 7, characterized in that: During the correction process, once the linear displacement sensor detects a deviation in the annular conveyor belt, the PLC calculates the degree of deviation of the guide roller and controls the tensioning cylinder to slightly increase or decrease oil accordingly. This causes the axis of the passive roller to slightly deviate in the left or right direction, forcing the annular conveyor belt to move in the opposite direction, thereby achieving the correction of the annular conveyor belt.

9. The rapid assembly method for a ring conveyor belt sample according to claim 7, characterized in that: In step S3, the lifting cylinder is raised to cause the front side of the movable bracket to rise slightly by 0.1-0.5mm and support the movable frame.

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