Automatic material distribution system

Abstract

The utility model relates to an automatic material distribution system. The utility model is suitable for the technical field of mine unloading. The technical problem to be solved by the utility model is to provide the automatic material distribution system. According to the technical scheme, the automatic material distribution system comprises an unloading trolley arranged on a traveling crane span structure in a material storage yard, and the unloading trolley can move along the traveling crane span structure; the detection modules are arranged at a plurality of unloading points on the crane bridge, and the detection modules can obtain first material level height information corresponding to material piles below the unloading points; the positioning module can determine the positioning information of the unloading trolley on the traveling crane span structure; the control module, the detection module and the positioning module are all in communication connection with the control module, the control module can obtain first material level height information and positioning information, and if the first material level height information is lower than an internal preset material level height threshold value, the unloading trolley is controlled to move to a corresponding unloading point for unloading; and the first material level height information of the corresponding discharging point meets the preset material level height threshold value.

Description

Technical Field

[0001] This utility model relates to the field of mining unloading technology, and in particular to an automatic material distribution system. Background Technology

[0002] The movement and unloading of the mine unloading trolley are manually operated through a field control box installed next to the belt conveyor. This method has the following problems:

[0003] (1) The height and weight of manually stacked materials are uneven, and the storage yard will sink. If it is not repaired in time, it may cause the building structure to collapse and cause a serious safety accident.

[0004] (2) The unloading trolley operation and material stacking are manually operated on-site by the operators. There are control errors in the stacking position and the amount of material stacked, resulting in low utilization rate and efficiency of the silo stacking.

[0005] (3) The production process of sand and gravel aggregates results in serious dust pollution during the transportation and stockpiling of the aggregates. The long-term manual operation of the on-site control box next to the unloading trolley by the operators will seriously harm the health of the workers.

[0006] (4) Due to the heavy production tasks, the on-site control box of the unloading trolley is located high, and the operators have to manually operate the unloading trolley on-site for a long time, which poses safety hazards for both walking and unloading.

[0007] Therefore, the unloading control of the stockpile unloading trolley needs to be designed to meet the requirements of accurately controlling the height of the stockpile and the weight of the stones stored in the stockpile, so as to avoid the stockpile sinking. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide an automatic material feeding system to address the above-mentioned problems.

[0009] The technical solution adopted by this utility model is: an automatic fabric distribution system, comprising:

[0010] The unloading trolley is located on the overhead crane in the stockpile and can move along the overhead crane.

[0011] The detection module is located at multiple unloading points on the overhead crane bridge. The detection module is able to obtain the first material level height information corresponding to the material pile below the unloading point.

[0012] The positioning module is capable of determining the positioning information of the unloading trolley on the overhead crane;

[0013] The control module, the detection module and the positioning module are all communicatively connected to the control module. The control module can obtain the first material level height information and the positioning information. If the first material level height information is lower than the internal preset material level height threshold, the control module controls the unloading trolley to move to the corresponding unloading point for unloading until the first material level height information of the corresponding unloading point meets the preset material level height threshold.

[0014] Using the above-mentioned technical means, the detection module detects the material level height at multiple fixed unloading points, the positioning module can obtain the position of the unloading trolley on the overhead crane, and the control module drives the unloading trolley to move to the unloading point where the material pile height does not meet the requirements for unloading, until the material pile height at the unloading point reaches the preset height. Through automatic stacking, the height and weight of each material pile in the stockyard are balanced, and the unloading efficiency in the stockyard is improved.

[0015] In some embodiments, the detection module includes multiple radar level gauges, and each of the multiple unloading points is equipped with a radar level gauge. The radar level gauge can detect the height of the material pile below to obtain the first material level height information, and the spacing between the unloading points is determined according to the coverage radius of the radar level gauge.

[0016] In some embodiments, the positioning module includes an encoder and a wireless pulse positioner. The encoder is installed on the unloading trolley and can obtain the travel distance of the unloading trolley. The wireless pulse positioner can obtain the position difference of the unloading trolley on the overhead crane. The control module obtains the travel distance and the position difference and compares them to achieve position calibration.

[0017] In some embodiments, the positioning module further includes an RFID radio frequency component, which includes a card reader and electronic tags. The card reader is communicatively connected to the control module and is installed on the unloading trolley. Multiple electronic tags are installed at intervals on the overhead crane. The control module can obtain information from the electronic tags read by the card reader in real time to determine the location of the unloading trolley.

[0018] In some embodiments, a monitoring and control platform is also included. The control module is communicatively connected to the monitoring and control platform. The control module uploads both the first material level height information and the positioning information to the monitoring and control platform. The monitoring and control platform remotely controls the unloading trolley through the control module.

[0019] In some embodiments, a monitoring module is also included. The monitoring module is communicatively connected to the monitoring and control platform. The monitoring module is able to acquire monitoring images of the material unloading trolley placing material in the material yard and upload the monitoring images to the monitoring and control platform.

[0020] In some embodiments, the detection module further includes a laser level gauge, which is communicatively connected to the monitoring and control platform. The laser level gauge is installed on the unloading trolley and can detect the second material level height information of the material pile below the unloading trolley in real time. The laser level gauge uploads the second material level height information to the monitoring and control platform, which can fit the second material level height information into a material level curve and display it through the display terminal of the monitoring and control platform.

[0021] In some embodiments, the system further includes a discharge module, wherein a plurality of discharge modules are disposed below the overhead crane bridge, the discharge module corresponds to the unloading point, the discharge module is communicatively connected to the control module, and the discharge module is capable of transporting and discharging the material pile at the unloading point.

[0022] If the first material level height information at the unloading point is higher than the preset upper limit height of the material level inside the control module, the control module starts the discharge module corresponding to the unloading point to discharge material. If the first material level height information at the unloading point is lower than the preset lower limit height of the material level inside the control module, the control module shuts down the discharge module corresponding to the unloading point.

[0023] In some embodiments, a limiting module is further included. The limiting module is installed on the unloading trolley and the traveling bridge respectively. The limiting module is communicatively connected to the control module. If the unloading trolley moves to a preset limiting position on the traveling bridge, the limiting module will send corresponding limiting information to the control module. After obtaining the limiting information, the control module will control the unloading trolley to stop.

[0024] The beneficial effects of this utility model are:

[0025] 1. The positioning module determines the position of each unloading point and the unloading trolley, the detection module detects the material pile height at each unloading point, and the control module drives the unloading trolley to move to the unloading point where the material pile height does not meet the requirements for unloading. This ensures that the material pile height and weight at each unloading point meet the preset requirements. The unloading operation is carried out by automatically controlling the unloading trolley, which reduces the control error of stacking position and material quantity caused by manual operation, improves the efficiency and precision of unloading operation, and ensures the health and safety of operators by eliminating the need for operators to work on site for a long time. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Unloading trolley; 2. Radar level gauge; 3. Laser level gauge; 4. Encoder; 5. Overhead crane; 6. Discharge module.

[0029] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.

[0030] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps.

[0031] "First," "second," etc. As used in this article, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0033] Combination Figure 1 As shown, this embodiment is an automatic material distribution system, including an unloading trolley 1, a detection module, a positioning module, and a control module. A traveling crane 5 is provided in the material yard, and the unloading trolley 1 is mounted on the traveling crane 5. The unloading trolley 1 can move along the traveling crane 5, and its main power supply is via a sliding contact line. Multiple unloading points are provided on the traveling crane 5, and each unloading point is equipped with a corresponding detection module. The detection module can acquire the first material level height information corresponding to the material pile below the unloading point. The unloading trolley 1 is equipped with a positioning module, which can determine the positioning information of the unloading trolley 1 on the traveling crane 5. The detection module and the positioning module are communicatively connected to the control module. The control module can acquire the first material level height information and the positioning information. If the first material level height information is lower than an internal preset material level height threshold, the control module controls the unloading trolley 1 to move to the corresponding unloading point for unloading until the first material level height information of the corresponding unloading point meets the preset material level height threshold.

[0034] In some implementations, the detection module includes multiple radar level gauges 2, with each unloading point corresponding to a radar level gauge 2. The radar level gauge 2 can detect the height of the material pile below to obtain the first material level height information. The spacing between the unloading points is determined based on the coverage radius of the radar level gauge 2. Specifically, the radar level gauge 2 employs a special correlation demodulation technique to accurately identify the time interval between the transmitted and received pulses, thereby further calculating the distance from the antenna to the surface of the measured medium.

[0035] In some implementations, the positioning module includes an encoder 4 and a wireless pulse positioner. The encoder 4 is mounted on the unloading trolley 1 and can obtain the travel distance of the unloading trolley 1. The wireless pulse positioner can obtain the position difference of the unloading trolley 1 on the overhead crane 5. The control module obtains the travel distance and position difference and compares them to achieve position calibration. Specifically, when the unloading trolley 1 moves, it drives the encoder 4 to rotate and generate pulses. The actual travel distance of the unloading trolley 1 is determined by calculating the ratio of the number of pulses to the distance, and the encoder 4 data is calibrated by comparing it with the data from the wireless pulse positioner in real time.

[0036] Furthermore, the positioning module also includes an RFID radio frequency component, which consists of a reader and electronic tags. The reader is communicatively connected to the control module and is mounted on the unloading trolley 1, moving with it. Multiple electronic tags are spaced apart on one side of the overhead crane 5. Each electronic tag can be customized with its current location value, requiring high installation accuracy. When the unloading trolley 1, equipped with the reader, scans the trolley, the reader acquires the location value from the electronic tag and sends it to the control module. The control module compares the real-time location value read by the reader with the value calculated by the encoder 4 to calibrate the position of the unloading trolley 1. This, through the RFID radio frequency component, eliminates accumulated errors caused by uncertainties in the field.

[0037] In some implementation schemes, the automatic material placement system also includes a monitoring and control platform. The control module is connected to the monitoring and control platform and uploads the first material level height information and positioning information to the monitoring and control platform. The monitoring and control platform remotely controls the unloading trolley 1 through the control module.

[0038] Furthermore, the automatic material placement system also includes a monitoring module. This module communicates with the monitoring and control platform, acquiring monitoring images of the material placement by the unloading trolley 1 within the material yard. The monitoring module then uploads these images to the monitoring and control platform. Specifically, in this embodiment, the monitoring module uses a high-definition network PTZ camera. One or more cameras are installed on each overhead crane 5, transmitting the monitoring images to the monitoring and control platform. This allows for comprehensive monitoring of the entire unloading trolley 1's operation, facilitating monitoring of the unloading trolley 1's operation, material pile height, and other information by the operators on the monitoring and control platform, and enabling them to issue control commands. This also facilitates unified management and coordination.

[0039] Furthermore, the detection module also includes a laser level gauge 3, which is connected to the monitoring and control platform. The laser level gauge 3 is installed on the unloading trolley 1 and can detect the second material level height information of the material pile below the unloading trolley 1 in real time. The laser level gauge 3 uploads this second material level height information to the monitoring and control platform, which can then fit the second material level height information into a material level curve and display it through its display terminal. The monitoring and control platform can set warning values ​​for the generated material level curve, presenting three material level states based on the warning value: low material level (yellow), normal material level (green), and high material level (red).

[0040] Furthermore, in this embodiment, the control module includes an electrical control box, which is mainly used for power supply, signal acquisition, data transmission, and local control of the field equipment in the unloading yard. The electrical control box controls the operation of the unloading trolley 1 through a PLC. In this embodiment, the monitoring and control platform includes a centralized control room, and the electrical control box can transmit data communication to the centralized control room. The centralized control room mainly realizes the following functions: switching the control interface of the unloading trolley 1 in different areas, setting and displaying the high and low level alarms of the material pile, setting the material pile replenishment height, monitoring and controlling the operating status of the trolley and other equipment, video monitoring control and display, storing and setting parameters related to the trolley and other equipment and the material placement strategy, setting and processing parameters related to data communication with the main control room, starting and stopping the trolley and other equipment, generating and printing production reports, etc.

[0041] In some implementations, the automatic material distribution system also includes a discharge module 6. Multiple discharge modules 6 are located below the overhead crane 5. The discharge modules 6 correspond to the unloading points and are communicatively connected to the control module. The discharge modules 6 are capable of transporting and discharging the material pile at the unloading points.

[0042] If the first material level height information at the unloading point is higher than the preset upper limit height of the material level inside the control module, the control module will start the discharge module 6 corresponding to the unloading point to discharge the material. If the first material level height information at the unloading point is lower than the preset lower limit height of the material level inside the control module, the control module will shut down the discharge module 6 corresponding to the unloading point.

[0043] In some implementations, the automatic material distribution system also includes a limit module, which is installed on the unloading trolley 1 and the traveling bridge 5 respectively. The limit module is connected to the control module. If the unloading trolley 1 moves to the preset limit position on the traveling bridge 5, the limit module will send the corresponding limit information to the control module. After obtaining the limit information, the control module will control the unloading trolley 1 to stop.

[0044] Furthermore, in this embodiment, to prevent the unloading trolley 1 from running into a dangerous area outside the safe range during automatic or manual operation, the limit module sets up three layers of safety protection for the unloading trolley 1 according to the site conditions:

[0045] (1) Automatic control program soft protection: The position of the unloading trolley 1 is monitored in real time by the automatic control program. When the position of the unloading trolley 1 exceeds the safe range set by the management personnel, the control module will issue an alarm prompt on the display terminal in the central control room.

[0046] (2) Pre-warning limit device for unloading trolley 1: A limit switch is installed on unloading trolley 1. When unloading trolley 1 automatically moves to the corresponding position, the limit switch signal is immediately transmitted to the control module, and the control module controls unloading trolley 1 to stop.

[0047] (3) Limit stop device for unloading trolley 1: A limit switch is installed on the traveling bridge 5 of unloading trolley 1. When unloading trolley 1 runs to the limit position, the limit switch disconnects the power supply of the motor of unloading trolley 1, causing unloading trolley 1 to stop due to power failure.

[0048] In some implementation schemes, the communication in this embodiment includes both wired and wireless communication. Wired communication uses a physical transmission medium (such as optical fiber or electrical cable) for signal transmission. Specifically, signals from radar level gauge 2, laser level gauge 3, encoder 4, etc., are all connected to the electrical control box via wired communication and then transmitted to the central control room via optical fiber. When wired communication is not possible due to special circumstances on site, wireless communication is used. That is, a wireless communication transmitter is installed on the unloading trolley 1, and a wireless communication receiver is installed next to the trolley frame.

[0049] In some implementation schemes, in this embodiment, the network aspect of the control layer uses an adaptive transmission rate of 100Mbps / 1000Mbps, employing the TCP / IP protocol. It automatically switches to a backup link when the primary network experiences a link failure. Based on actual site conditions, the PLC control of the unloading trolley 1 uses an IO substation approach, adopting an open distributed architecture. The network structure is a gigabit fiber optic industrial Ethernet, comprising a central control center information layer, a PLC system control layer, a fieldbus intelligent control layer, and a local control layer. Each unloading trolley 1 is an independent control system diagram, without interference. A fieldbus area network communication cabinet (or integrated into an existing automatic control network cabinet) is installed in each area of ​​the workshop. The network communication cabinet supports mainstream industrial fieldbus communication protocols such as PROFINET, PROFIBUS-DP, Ethernet / IP, and Modbus / TCP. The maximum communication rate can reach 5–100Mbps, and the communication medium is fiber optic, etc.

[0050] The monitoring module adopts an IP system architecture, consisting of front-end IP cameras, a 1000M / 1000M Ethernet LAN, a regional network switch, a core switch, a management server, and video display terminals. The network communication medium uses Category 6 network cables (not exceeding 100 meters) or fiber optic cables (exceeding 100 meters). There are no connectors between the communication Category 6 network cables, fiber optic cables, and monitoring video cables (except for the main fiber optic cable). The communication protocol used is TCP / IP.

[0051] In some implementation schemes, this embodiment sets the control module to three different modes—on-site manual material placement, remote manual material placement, and automatic material placement—based on on-site construction, production, and worker operating habits. This ensures that the equipment reduces the failure rate during production operation, thereby guaranteeing that production output is not affected.

[0052] Furthermore, the manual material placement mode is mainly suitable for special and maintenance situations. On-site personnel control the movement of the unloading trolley 1 via buttons on the electrical control box and a remote controller, based on the material pile conditions, the actual operation of the trolley, and maintenance needs. The manual material placement mode features multiple protection functions, including operating condition selection, a comprehensive motor protector, and limit switches.

[0053] Furthermore, the remote manual material placement mode is mainly applicable to system debugging and special material placement situations. Multiple unloading trolleys 1 are remotely and manually controlled via the operation interface in the central control room. The operator in the central control room ensures, through video monitoring, that there are no operators on site and that the unloading trolleys 1 are functioning normally. Once confirmed, the operator remotely operates the unloading trolleys 1 to the target location based on the real-time image displayed on the terminal. The remote manual material placement mode features multiple protection functions, including real-time updates to the positioning module, comprehensive motor protection, real-time scanning of material pile data, location information alarms, material pile height / low alarms, and limit switches.

[0054] Furthermore, for the automatic fabric distribution mode, the following two fabric distribution strategies are included:

[0055] (1) Automatic and uniform material distribution

[0056] When the unloading trolley 1 starts running, the unloading height is set, and the material height data of each unloading point is judged by the radar level gauge 2 and the laser level gauge 3. After the data is judged, the material distribution begins: the unloading trolley 1 returns to the rearmost unloading point to unload. When the unloading height of the rearmost unloading point reaches the set unloading height, the unloading trolley 1 moves towards the front of the machine to the second unloading point. When the unloading at the second unloading point reaches the set height, the unloading trolley 1 moves towards the front of the machine to the third unloading point. Then the above steps are repeated until the unloading at one of the unloading points at the front of the machine reaches the set height. Then the material distribution trolley moves back to the rearmost unloading point to unload. Then the above unloading steps are repeated to achieve uniform material distribution.

[0057] (2) Priority fabric

[0058] When the unloading trolley 1 starts running, the unloading point is determined by the signal from the radar level gauge 2 (prioritizing the unloading port with the lowest value of the radar level gauge 2). After the unloading height is set, material distribution begins: the unloading trolley 1 travels to the unloading point corresponding to the lowest material level and unloads. When the material height at the unloading point reaches the set height or when the height of other material piles is lower than the minimum set value, the radar level gauge 2 determines this, and then the trolley travels to the unloading port corresponding to the lowest radar level gauge 2 to unload (except when the set value is reached). After the unloading height reaches the set height, the above steps are repeated. When all unloading ports corresponding to the radar level gauge 2 reach the unloading height, the unloading trolley 1 begins "uniform material distribution". When the material height measured by the radar level gauge 2 reaches the low value, the unloading trolley 1 begins "prioritized material distribution", and then the above steps are repeated.

[0059] The implementation principle of an automatic fabric distribution system is as follows:

[0060] The height of the material pile below is detected by radar level gauges at each unloading point. The detected material level is compared with the preset material level threshold. Unloading points where the actual material level is lower than the preset threshold are identified. The unloading trolley is then moved to the corresponding unloading point for unloading. The unloading trolley is automatically controlled by an electrical control box or a centralized control room. This eliminates the need for prolonged manual operation by personnel, ensuring their health and safety. Furthermore, the automatic control of the unloading trolley, combined with uniform and priority distribution strategies, ensures a balance in the height and weight of the material pile within the yard, effectively improving distribution efficiency and preventing subsidence. It also allows for precise control of the stacking location and volume, ensuring the utilization rate of the yard and achieving refined management of unloading.

[0061] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An automatic cloth distribution system, characterized by, The utility model relates to a kind of material unloading system, including: Discharge trolley (1) is arranged on the travelling bridge (5) in stockyard, the discharge trolley (1) can move along the travelling bridge (5); Detection module is arranged at a plurality of unloading points on the travelling bridge (5), the detection module can obtain the first material level height information corresponding to the stockpile below the unloading point; Positioning module can determine the positioning information of the discharge trolley (1) on the travelling bridge (5); Control module, the detection module, the positioning module are all connected with the control module, the control module can obtain the first material level height information and the positioning information, if the first material level height information is lower than internal preset material level height threshold, control the discharge trolley (1) moves to the unloading point and unloads, until the first material level height information of the unloading point meets preset material level height threshold; It further includes supervision and control platform, the control module is connected with the supervision and control platform, the control module uploads the first material level height information and the positioning information to the supervision and control platform, and the supervision and control platform realizes remote control to the discharge trolley (1) through the control module.

2. The automatic cloth distribution system according to claim 1, wherein: The detection module includes a plurality of radar material level meters (2), a plurality of the unloading points are correspondingly provided with the radar material level meter (2), the radar material level meter (2) can detect the height of the stockpile below to obtain the first material level height information, and the spacing of the unloading points is determined according to the coverage radius of the radar material level meter (2).

3. The automatic cloth distribution system according to claim 1, wherein: The positioning module includes an encoder (4) and a wireless pulse positioner, the encoder (4) is installed on the discharge trolley (1), the encoder (4) can obtain the walking distance of the discharge trolley (1), the wireless pulse positioner can obtain the movement position difference of the discharge trolley (1) on the travelling bridge (5), and the control module compares the walking distance with the movement position difference to realize position calibration.

4. An automatic cloth distribution system according to claim 3, characterized in that: The positioning module further includes an RFID radio frequency assembly, the RFID radio frequency assembly includes a card reader and an electronic tag, the card reader is connected with the control module, the card reader is installed on the discharge trolley (1), a plurality of the electronic tags are installed at intervals on the travelling bridge (5), and the control module can obtain the information of the electronic tag read by the card reader in real time to determine the position of the discharge trolley (1).

5. The automatic cloth distribution system according to claim 1, wherein: It further includes a monitoring module, the monitoring module is connected with the supervision and control platform, the monitoring module can obtain the monitoring picture of the discharge trolley (1) in stockyard, and the monitoring module uploads the monitoring picture to the supervision and control platform.

6. The automatic cloth distribution system according to claim 1, wherein: The detection module further comprises a laser material level meter (3) in communication connection with the supervision and control platform, the laser material level meter (3) is installed on the unloading trolley (1), the laser material level meter (3) can detect the second material level height information of the material pile below the unloading trolley (1) in real time, the laser material level meter (3) uploads the second material level height information to the supervision and control platform, and the supervision and control platform can fit the second material level height information into a material level curve and display the material level curve through a display terminal of the supervision and control platform.

7. The automatic cloth distribution system according to claim 1, wherein: Further comprising a discharging module (6), a plurality of the discharging module (6) is arranged below the travelling bridge (5), the discharging module (6) corresponds to the unloading point, the discharging module (6) is in communication connection with the control module, and the discharging module (6) can transport and discharge the material pile of the unloading point; If the first material level height information of the unloading point is higher than the preset upper limit height of the material level in the control module, the control module starts the discharging module (6) corresponding to the unloading point to discharge, and if the first material level height information of the unloading point is lower than the preset lower limit height of the material level in the control module, the control module closes the discharging module (6) corresponding to the unloading point.

8. The automatic cloth distribution system according to claim 1, wherein: Further comprising a limiting module, the limiting module is respectively installed on the unloading trolley (1) and the travelling bridge (5), the limiting module is in communication connection with the control module, if the unloading trolley (1) moves to the preset limiting position on the travelling bridge (5), the limiting module will send corresponding limiting information to the control module, and the control module will control the unloading trolley (1) to stop after obtaining the limiting information.

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