Wheel-rail type belt conveyor car operation resistance real-time detection system and method

Abstract

The present application relates to the field of belt conveyor, in particular to a wheel-rail type belt conveyor trolley running resistance real-time detection system, comprising a trolley group connected in series by connecting units, a detection unit for testing trolley pulling force and a control unit electrically connected to the detection unit. By testing the difference of the front and rear pulling force of the trolley, the running resistance of the test trolley can be calculated, and then the equivalent friction resistance coefficient is calculated, and then the resistance received in the running process is calculated according to the design parameters of the wheel-rail type belt conveyor. It is a convenient, fast and accurate evaluation method.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of belt conveyors, in particular to a wheel-rail type belt conveyor trolley running resistance real-time detection system and method. BACKGROUND

[0002] In the traditional belt conveyor, the conveying belt is supported by the carrier roller to complete the transportation work. A plurality of carrier rollers are arranged side by side on the support, the positions between the carrier rollers and the support are relatively fixed, the carrier rollers can rotate, the conveying belt drives the carrier rollers to rotate when moving to move forward to complete the conveying of materials.

[0003] The wheel-rail type belt conveyor is a new type of bulk material conveying system, which has a unique wheel-rail structure: the trolley replaces the carrier roller to run on the track, and the trolley and the conveying belt are relatively stationary, eliminating the largest energy consumption ratio in the traditional belt conveyor, the compression resistance, avoiding the wear and tear caused by the wave motion of the conveying belt on the carrier roller, thereby prolonging the service life of the conveying belt.

[0004] The running power of the conveying belt is provided by the friction between the driving drum and the conveying belt. The conveying belt relies on its own and the gravity of the material to press on the trolley, which drives the trolley to move on the track. The resistance is mainly composed of the rolling friction resistance between the trolley wheels and the track, the bearing resistance, and the additional resistance through the complex circuit of the turning section. Compared with the traditional belt conveyor, the total running resistance is greatly reduced.

[0005] At present, there is a lack of wheel-rail type belt conveyor trolley running resistance real-time detection technology, which cannot guide the resistance calculation in the project design stage. After the equipment is installed and runs for a period of time, the running resistance of part of the line increases due to track irregularities and other reasons, which cannot be detected in real time, causing great difficulty in the construction and subsequent maintenance of the project. Therefore, a simple and practical wheel-rail type belt conveyor trolley running resistance real-time detection system and method are urgently needed. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a wheel-rail type belt conveyor trolley running resistance real-time detection system, which comprises a trolley group connected in series by a connecting unit, a detection unit for detecting the pulling force of the test trolley, and a control unit electrically connected to the detection unit. By testing the difference between the front and rear pulling forces of the test trolley, the running resistance of the test trolley can be calculated, and then the equivalent friction resistance coefficient can be calculated. Then, the resistance received during operation is calculated according to the design parameters of the wheel-rail type belt conveyor.

[0007] Further, the trolley group comprises a front trolley group, a rear trolley group, and a test trolley group arranged between the end of the front trolley group and the front end of the rear trolley group. The front trolley group is one or more test trolleys connected in series; the rear trolley group is one or more trolleys connected in series; and the test trolley group is one or more trolleys connected in series.

[0008] Further, the trolleys in the front trolley group and the rear trolley group are of the same size, the trolleys in the test trolley group are of the same shape as the trolleys in the front trolley group and the rear trolley group, and the trolleys in the test trolley group are lower than the trolleys in the front trolley group and the rear trolley group, the top of the trolley in the test trolley group is not in contact with the conveying belt, and the test trolley is provided with a counterweight.

[0009] Further, the detection unit comprises a front detection unit arranged between the end of the front trolley group and the front end of the test trolley group and a rear detection unit arranged between the front end of the rear trolley group and the end of the test trolley group.

[0010] Further, the connection unit is made of flexible material with elasticity, each connection unit is of the same size and is arranged at the same position on the trolley, and each connection unit is provided with a pre-tension, and the connection unit comprises a front connection unit and a rear connection unit.

[0011] Further, the detection unit is a tension sensor, the front detection unit is used to detect the tension of the front connection unit at the arranged position, the rear detection unit is used to detect the tension of the rear connection unit at the arranged position, and the control unit collects the signals of the tension sensors and stores the operation.

[0012] The application also provides a real-time detection method for the running resistance of trolleys of a wheel-rail type belt conveyor, which comprises the following steps: S1: using the real-time detection system for the running resistance of trolleys of a wheel-rail type belt conveyor, building a detection platform, measuring the self-weight of the detection trolley as G0, setting the mass of the counterweight as G1, adjusting the pre-tension of the connection unit as F0, and giving the speed of the wheel-rail type belt conveyor as V; S2: giving an instruction to make the detection system run according to the set parameters, transmitting the detected tension value F1 of the front detection unit to the controller, transmitting the detected tension value F2 of the rear detection unit to the controller, and obtaining f=F1-F2, which is the resistance of the test trolley; S3: reading the data according to the operation μ=f / (G0+G1) to obtain the first test data μ1; S4: repeating S1 to S3 for n times to obtain μ1, μ2, …, μn; S5: calculating the total resistance F of the conveying line according to the design parameters of the wheel-rail type belt conveyor based on the resistance friction coefficient obtained in S4, wherein F=μ×F×N, F is the sum of the mass of the conveying belt, the trolley and the material on the conveying line, and N is the total number of trolleys. n n f

[0013] ​​​By using the system and method, the change value of the front and rear pulling force of the test dolly is reflected by the front and rear pulling force detection unit, the running resistance of the test dolly can be calculated in real time, the equivalent friction resistance coefficient is calculated, and then the resistance in the running process is calculated according to the design parameters of the wheel and rail type belt conveyor, so that a convenient, fast and accurate evaluation mode is provided. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and other objects and advantages of the present application will become more apparent by describing in detail the following embodiments thereof with reference to the attached drawings in which like reference numerals refer to like elements throughout the several views.

[0015] Figure 1 is a structural schematic view of the horizontal section of the present application;

[0016] Figure 2 is a structural schematic view of the rotating wheel section of the present application;

[0017] Figure 3 is a partial structural schematic view of the test dolly of the present application.

[0018] Label explanation: 11-front dolly, 12-rear dolly, 2-test dolly, 3-wheel, 41-front detection unit, 42-rear detection unit, 51-front connection unit, 52-rear connection unit, 6-track, 7-conveying belt, 8-control unit. EMBODIMENT

[0019] The present application will be further described in detail below in combination with embodiments. The advantages and characteristics of the present application will become more apparent as the description proceeds. However, these embodiments are only exemplary and do not constitute any limitation on the scope of the present application. Those skilled in the art should understand that the details and forms of the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application, and such modifications and replacements all fall within the protection scope of the present application.

[0020] The terms such as "comprising" and "including" mean that the technical solutions of the present application do not exclude other components not directly or explicitly expressed in addition to the components directly and explicitly expressed in the description and claims. In the description herein, the orientation terms such as "upper", "lower", "front", "rear" and the like should be understood as relative concepts, which are used for relative position description and clarification, and the corresponding specific orientation can be changed accordingly according to the change of the orientation of the crusher.

[0021] As Figure 1 , Figure 2 and Figure 3As shown, this invention provides a real-time detection system for the running resistance of a wheel-rail belt conveyor trolley. The system includes a trolley group connected in series with a connecting unit, a detection unit for detecting the tension of the test trolley 2, and a control unit 8 electrically connected to the detection unit. By measuring the difference in tension between the front and rear of the test trolley 2, the running resistance of the test trolley 2 can be calculated, and then the equivalent frictional resistance coefficient can be calculated. Finally, based on the design parameters of the wheel-rail belt conveyor, the resistance experienced during operation can be calculated.

[0022] like Figure 1 As shown, the trolley group includes 11 front trolleys, 12 rear trolleys, and 2 test trolleys positioned between the end of the 11 front trolleys and the front of the 12 rear trolleys. The 11 front trolleys consist of one or more test trolleys connected in series; the 12 rear trolleys consist of one or more trolleys connected in series; and the 2 test trolleys consist of one or more trolleys connected in series. Using one or more trolleys connected in series allows for adjustment of the number of trolleys during testing, improving test accuracy.

[0023] In this embodiment, the trolleys in the front trolley group 11 and the rear trolley group 12 are the same size. The trolleys in the test trolley group 2 are similar in shape to those in the front trolley group 11 and the rear trolley group 12, but are shorter. The top of the trolley in the test trolley group 2 does not contact the conveyor belt 7. This avoids friction interference from the conveyor belt and allows for accurate testing of the friction coefficient on the track 6. The test trolley group 2 is equipped with counterweights. Different counterweights can be installed simultaneously during the test to verify the accuracy of the test structure. In this embodiment, counterweights of 10kg, 20kg, and 50kg were used. Experimental results show that the accuracy of the data is related to the matching degree of the pre-tension F0, preset speed V, and counterweight G1 selected in the experiment. When the matching degree is relatively consistent, the accuracy is higher. Therefore, when the pre-tension and preset speed increase, the counterweight should also be increased. The selection of counterweights is also related to the weight of the motorcycle itself.

[0024] The detection unit includes a front detection unit 41 located between the end of the front trailer group 11 and the front of the test trailer group 2, and a rear detection unit 42 located between the front of the rear trailer group 12 and the end of the test trailer group 2. The connecting units are made of a flexible, elastic material. All connecting units are the same size and have the same connection position on the trailer. Each connecting unit has pre-tension to ensure it does not slack. The connecting unit includes a front connecting unit 51 and a rear connecting unit 52. The detection unit is a tension sensor. The front detection unit 41 detects the tension force on the front connecting unit 51 at its installation position, and the rear detection unit 42 detects the tension force on the rear connecting unit 52 at its installation position. In this embodiment, a tension sensor based on the stress-strain principle is used; however, tension detection devices based on various principles, such as fiber optic sensing, can also be used. The control unit 8 collects, stores, and processes the signals from the tension sensors.

[0025] This invention also provides a method for real-time detection of the running resistance of a wheel-rail type belt conveyor trolley. The steps are as follows: S1: Using the aforementioned real-time detection system for the running resistance of a wheel-rail type belt conveyor trolley, a detection platform is built. The self-weight of the trolley is measured as G0, the mass of the counterweight is set as G1, the preset tension of the connecting unit is adjusted to F0, and the speed of the wheel-rail type belt conveyor is given as V; S2: An instruction is given to make the detection system run according to the set parameters. The front detection unit 41 transmits the detected tension value F1 to the controller, and the rear detection unit 42 transmits the detected tension value F2 to the controller, obtaining f = F1 - F2, which is the resistance of the test trolley 2; S3: Data is read according to the calculation μ = f / (G0 + G1) to obtain the first test data μ1; S4: S1 to S3 are repeated n times to obtain μ1, μ2...μ n Find the average value μ = (μ1 + μ2 + ... + μ) n S5: Based on the resistance friction coefficient obtained in S4, calculate the total resistance F of the conveyor line according to the design parameters of the wheel-rail belt conveyor. f =μ×F×N, where F is the sum of the mass of the conveyor belt, trailers and materials on the transport line, and N is the total number of trailers.

[0026] In actual testing, with the trailer's weight fixed, multiple tests were conducted by adjusting the pre-tension F0, preset speed V, and counterweight G1. The conclusion was that as the pre-tension and preset speed increase, the counterweight should also be increased. Furthermore, other embodiments indicate that the selection of the counterweight is also related to the trailer's weight.

[0027] By using the system and method, the change value of the front and rear pulling force of the test dolly is reflected by the front and rear pulling force detection unit, the running resistance of the test dolly can be calculated in real time, the equivalent friction resistance coefficient is calculated, and then the resistance in the running process is calculated according to the design parameters of the wheel-rail belt conveyor, so that a convenient, fast and accurate evaluation mode is provided.

[0028] The embodiments in the above examples can be further combined or replaced, and the examples only describe the preferred embodiments of the present application, and do not limit the concept and scope of the present application. Without departing from the design idea of the present application, various changes and improvements of the technical solutions of the present application made by the skilled in the art all belong to the protection scope of the present application.

Claims

1. A real-time detection system for the running resistance of a wheel-rail type belt conveyor trolley, characterized in that: It includes a set of trailers connected in series with a connecting unit, a testing unit for detecting the tensile strength of the trailers, and a control unit electrically connected to the testing unit; The connection unit includes a front connection unit and a rear connection unit; The detection unit includes a front detection unit disposed between the end of the front trailer group and the front of the test trailer group, and a rear detection unit disposed between the front of the rear trailer group and the end of the test trailer group. The detection unit is a tension sensor. The front detection unit is used to detect the tension force on the front connecting unit at the installation position, and the rear detection unit is used to detect the tension force on the rear connecting unit at the installation position. The control unit collects the signal from the tension sensor and stores and calculates it.

2. The real-time detection system for the running resistance of a wheel-rail type belt conveyor trolley according to claim 1, characterized in that: The trailer group includes a front trailer group, a rear trailer group, and a test trailer group located between the end of the front trailer group and the front of the rear trailer group. The front trailer group consists of one or more test trailers connected in series; the rear trailer group consists of one or more trailers connected in series; and the test trailer group consists of one or more trailers connected in series.

3. The real-time detection system for the running resistance of a wheel-rail type belt conveyor trolley according to claim 2, characterized in that: The trailers in the front and rear trailer groups are the same size. The trailers in the test trailer group are the same shape as the trailers in the front and rear trailer groups, but are lower in height. The top of the trailer in the test trailer does not contact the conveyor belt.

4. The real-time detection system for the running resistance of a wheel-rail type belt conveyor trolley according to claim 3, characterized in that: The connecting unit is made of a flexible material with elasticity. Each connecting unit has the same size and the connection position on the trailer is the same. Each connecting unit has pre-tension.

5. The real-time detection system for the running resistance of a wheel-rail type belt conveyor trolley according to claim 4, characterized in that: The test vehicle was equipped with counterweights.

6. A method for real-time detection of running resistance of a wheel-rail type belt conveyor trolley, comprising the following steps: S1: Using the real-time detection system for running resistance of a wheel-rail type belt conveyor trolley as described in any one of claims 1-5, a detection platform is built, the self-weight of the trolley is measured as G0, the mass of the counterweight is set as G1, the preset tension of the connecting unit is adjusted as F0, and the speed of the wheel-rail type belt conveyor is given as V; S2: Give instructions to make the detection system run according to the set parameters. The front detection unit transmits the detected tension value F1 to the controller, and the rear detection unit transmits the detected tension value F2 to the controller. The result is f = F1 - F2, which is the resistance of the test trolley. S3: Read the data according to the operation μ=f / (G0 +G1) to obtain the first test data μ1; S4: Repeat S1 to S3 n times to obtain μ1, μ2...μ n Find the average value μ = (μ1 + μ2 + ... + μ) n ) / n, which is the equivalent resistance friction coefficient of the system, where n is a natural number; S5: Based on the resistance friction coefficient obtained in S4, calculate the total resistance F of the wheel-rail belt conveyor according to the design parameters of the wheel-rail belt conveyor. f =μ×F×N, where F is the sum of the mass of the conveyor belt, trailers and materials on the transport line, and N is the total number of trailers.

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