Long discharging stroke material level detection device and detection method

Abstract

The invention discloses a long discharging stroke material level detection device and method, and belongs to the technical field of bulk material conveying. The long-unloading-stroke material level detection device comprises a control room, an intelligent following material level detection device and a signal transmitting device, and the signal transmitting device is installed on a movable unloading trolley; the intelligent following material level detection device comprises a positioning and signal receiver and a material level meter; the positioning and signal receiving device and the level gage move along with the movable discharging trolley below the discharging platform, the positioning and signal receiving device is in signal connection with the signal transmitting device, and the positioning and signal receiving device and the level gage are both in signal connection with the control room. The detection device can be arranged in a full-length mode in the walking direction of the discharging trolley, and compared with a traditional mode that material level gauges are arranged above a discharging platform at certain intervals, the number of the material level gauges is reduced; moreover, the intelligent follow-up material level detection device is installed below the discharging platform, platform beam interference signals are avoided, and the material level of the discharging point of the discharging car can be accurately and truly reflected.

Description

Technical Field

[0001] The present invention relates to the technical field of bulk material conveying, and more specifically to a long discharge stroke level detection device and a detection method. Background Art

[0002] At present, in large domestic mechanized bulk material raw material yards, belt conveyors are mostly used for feeding, and mobile discharge trucks are arranged on the belt conveyors for discharging. The mobile discharge truck is generally located on the discharge platform erected from the ground in a long-strip closed raw material yard, or on the top discharge platform of a closed storage silo. The mobile discharge truck discharges materials through the chutes on both sides to form a material pile at the material dropping opening opened on the discharge platform.

[0003] In order to detect the level height of the closed raw material yard and the silo, several level detectors are usually arranged at a certain distance on the discharge platform or the top of the silo. Using this detection method, the disadvantage is that when the discharge stroke H is relatively long, a large number of level detectors are required. And the measurement coverage range of the level detector is limited. The farther away from the level detector, the greater the measurement error. Especially when discharging between two level detectors, when the material level reaches the highest point, the measurement range of the level meter often only reaches 1 / 2 to 1 / 3, and it is difficult to reflect the true material level. Summary of the Invention

[0004] 1. Technical Problems to be Solved by the Invention

[0005] Aiming at the problem of large detection error in the level height of the material pile in the closed raw material yard and the silo with a relatively long discharge stroke H in the prior art, the present invention provides a long discharge stroke level detection device and a detection method. The level detection device under the discharge platform moves along with the mobile discharge truck according to the received position signal of the mobile discharge truck, and the level meter always maintains a fixed distance from the material dropping point, so as to achieve the purpose of accurately detecting the level height of the discharge point.

[0006] 2. Technical Solutions

[0007] To achieve the above object, the technical solutions provided by the present invention are as follows:

[0008] A long discharge stroke level detection device, including a control room, an intelligent following level detection device and a signal transmitting device. The signal transmitting device is installed on the mobile discharge vehicle; the intelligent following level detection device includes a positioning and signal receiver and a level gauge; the positioning and signal receiver and the level gauge move together with the mobile discharge vehicle under the discharge platform. The positioning and signal receiver is signal-connected to the signal transmitting device, and both the positioning and signal receiver and the level gauge are signal-connected to the control room. By adopting a long layout along the walking direction of the discharge vehicle, compared with the traditional method of setting level gauges at a certain distance above the discharge platform, the number of level gauges is reduced; moreover, by installing the level detection device under the discharge platform, the interference of the platform beam to the signal is avoided, and the level of the material dropping point of the discharge vehicle can be accurately and truly reflected.

[0009] A further technical solution is that the intelligent following level detection device further includes an inspection track vertically fixedly connected to the bottom surface of the discharge platform, a roller frame rollingly connected to the inspection track through rollers installed in the roller frame, and a driving motor. The driving motor drives the rollers to rotate and is fixedly connected to the outer side of the roller frame together with the positioning and signal receiver; the level gauge is fixedly connected to the bottom of the roller frame, rolls under the discharge platform and moves synchronously with the mobile discharge vehicle, intelligently follows and detects the level, can realize the full automation of the discharging process, and achieve unattended operation.

[0010] A further technical solution is that the intelligent following level detection device further includes a camera fixedly connected to the bottom of the roller frame. The camera is signal-connected to the control room and can perform real-time scanning on the material pile in the raw material yard to detect the raw material storage online.

[0011] A further technical solution is that the distance between the intelligent following level detection device and the material dropping opening opened on the discharge platform is 1.0 - 1.8 m, which can avoid the reflection of false level signals by flowing materials and thus avoid interfering with the detection accuracy.

[0012] A further technical solution is that the material dropping opening is a long strip-shaped grid opening, and the chute pipe orifice of the mobile discharge vehicle discharges materials directly facing the grid opening, which plays a certain screening role and avoids large particle materials from affecting the detection accuracy.

[0013] A further technical solution is that the signal transmitting device and the positioning and signal receiver use Bluetooth signals for positioning, so that according to different working conditions, WIFI positioning, uwb positioning or 5G positioning signals can be adopted.

[0014] A detection method for the above long discharge stroke level detection device, the steps are as follows:

[0015] When the mobile discharge vehicle on the feeding belt conveyor moves, the signal transmitting device sends a signal to the intelligent following level detection device;

[0016] The intelligent following level detection device moves together with the mobile discharge vehicle;

[0017] When the mobile discharging truck starts to distribute materials, the materials fall into the stockpile in the yard through the material dropping opening opened on the platform of the discharging truck.

[0018] The level gauge monitors the level height of the stockpile in real time and feeds back the signal to the control room.

[0019] When the height of the stockpile at the material dropping point reaches the preset maximum level height, the intelligent following level detection device alarms, and the mobile discharging truck moves forward to continue distributing materials.

[0020] 3. Beneficial effects

[0021] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0022] (1) For the long discharging stroke level detection device of the present invention, the level detection device is installed below the discharging platform, avoiding the interference of the platform beam on the signal, and can accurately and truly reflect the level of the material dropping point of the discharging truck; the level gauge moves along with the mobile discharging truck when distributing materials, and always maintains a fixed distance from the material dropping point, so as to achieve the effect of accurately detecting the level height of the discharging point.

[0023] (2) For the long discharging stroke level detection device of the present invention, it is arranged in a continuous length along the traveling direction of the discharging truck. Compared with the traditional method of setting level gauges at a certain distance above the discharging platform, the number of level gauges is reduced, saving investment.

[0024] (3) The long discharging stroke level detection device and its detection method of the present invention can realize intelligent following detection of the level along with the movement of the discharging truck, realize full automation of the discharging process, and achieve unattended operation; it can also monitor the level of the material dropping point of the discharging truck in real time, conduct an online inventory of the stockpiles in the entire operation area, and accurately master the inventory in the yard. Description of the drawings

[0025] Figure 1 Schematic structural diagram of the long discharging stroke level detection device for a specific embodiment;

[0026] Figure 2 For Figure 1 Side view schematic diagram;

[0027] Figure 3 For Figure 2 Enlarged schematic structural diagram of the intelligent following level detection device in

[0028] Figure 4 For Figure 3 Side view schematic diagram;

[0029] Figure 5 Enlarged schematic structural diagram of the intelligent following level detection device for a specific embodiment.

[0030] In the figure: 1. Feeding belt conveyor; 2. Mobile discharging truck; 21. Signal transmitting device; 22. Chute; 3. Discharging platform; 31. Material dropping opening; 4. Intelligent following level detection device; 40. Roller frame; 41. Inspection track; 42. Positioning and signal receiver; 43. Driving motor; 44. Camera; 45. Level gauge; 46. Roller; 10. Stockpile. Specific implementation mode

[0031] To further understand the content of the present invention, the invention will be described in detail with reference to the accompanying drawings.

[0032] Embodiment 1

[0033] The long discharging stroke level detection device of this embodiment, as Figure 1 、 2 shown, includes a control room, an intelligent following level detection device 4 and a signal transmitting device 21, and the signal transmitting device 21 is installed on the mobile discharging truck 2; the intelligent following level detection device 4 includes a positioning and signal receiver 42 and a level gauge 45; the positioning and signal receiver 42 and the level gauge 45 move together with the mobile discharging truck 2 under the discharging platform 3, the positioning and signal receiver 42 is signal-connected to the signal transmitting device 21, and both the positioning and signal receiver 42 and the level gauge 45 are signal-connected to the control room.

[0034] The detection method of the long discharging stroke level detection device of this embodiment is as follows:

[0035] 1. When the mobile discharging truck 2 on the feeding belt conveyor 2 moves, the signal transmitting device 21 sends a signal to the intelligent following level detection device 4;

[0036] 2. The intelligent following level detection device 4 moves together with the mobile discharging truck 2;

[0037] 3. When the mobile discharging truck 2 starts to distribute materials, the materials pass through the material dropping opening 31 opened on the discharging truck platform 3 and fall into the stockpile 10 in the yard;

[0038] 4. The level gauge 45 monitors the level height of the stockpile 10 in real time and feeds back the signal to the control room;

[0039] 5. When the height of the stockpile 10 at the material dropping point reaches the preset maximum level height, the intelligent following level detection device 4 gives an alarm, and the mobile discharging truck 2 moves forward and continues to distribute materials.

[0040] The long discharging stroke level detection device and its detection method in this embodiment are arranged longitudinally along the traveling direction of the mobile discharging vehicle 2. Compared with the traditional method of setting the level gauge 45 at a certain distance above the discharging platform 3, the number of level gauges 45 is reduced. Moreover, by installing the intelligent following level detection device 4 under the discharging platform 3, it can avoid misjudging the side beam of the discharging port as the highest point level signal when the level gauge 45 is installed on the mobile discharging vehicle 2 and moves with it. Thus, the platform beam of the discharging platform 3 can be prevented from interfering with the detection signal of the level gauge 45, and the level at the material dropping point of the discharging vehicle can be accurately and truly reflected. Moreover, the level gauge 45 moves together with the mobile discharging vehicle 2 during the material distribution process and always maintains a fixed distance from the material dropping point, so as to achieve the effect of accurately detecting the height of the material level at the discharging point.

[0041] Embodiment 2

[0042] The long discharging stroke level detection device in this embodiment has the same basic structure as that in Embodiment 1. The differences or improvements are as follows: As Figure 3 、 4 shown, the intelligent following level detection device 4 further includes a roller frame 40, a driving motor 43, and an inspection track 41 vertically and fixedly connected to the bottom surface of the discharging platform 3; the rollers 46 installed in the roller frame 40 are in rolling connection with the inspection track 41, and 4 rollers 46 are symmetrically installed on both sides of the inspection track 41; the driving motor 43 drives the rollers 46 to rotate, and is fixedly connected to the outer side of the roller frame 40 together with the positioning and signal receiver 42; the level gauge 45 is fixedly connected to the bottom of the roller frame 40; the intelligent following level detection device 4 rolls under the discharging platform 3 and moves synchronously with the mobile discharging vehicle 2, intelligently following and detecting the level, which can realize the full automation of the discharging process and achieve unattended operation. The intelligent following level detection device 4 further includes a camera 44 fixedly connected to the bottom of the roller frame 40. The camera 44 is signal-connected to the control room and can perform real-time scanning on the material piles in the raw material yard to online detect the raw material reserves; as Figure 5 shown, 2 cameras 44 are symmetrically installed to perform real-time scanning on the material piles at the two material dropping ports 31. The distance between the intelligent following level detection device 4 and the material dropping port 31 opened on the discharging platform 3 is 1.0 - 1.8 m. As Figure 2 shown, preferably 1500 mm, which can avoid the reflected false level signal of the flowing material and further avoid interfering with the detection accuracy. The material dropping port 31 is a long strip-shaped grid port, and the pipe orifice of the chute 22 of the mobile discharging vehicle 2 faces the grid port for discharging, which plays a certain screening role to avoid large particle materials from affecting the detection accuracy.

[0043] Embodiment 3

[0044] The long discharging stroke level detection device in this embodiment has the same basic structure as that in Embodiment 2. The differences or improvements are as follows: As Figure 1 、 2, as shown in Figures 3 and 4, it includes a feeding belt conveyor 1, a mobile discharging truck 2, a discharging platform 3, and an intelligent following level detection device 4. The feeding belt conveyor 1 is located on the T-shaped discharging platform 3 erected from the ground in a long strip-shaped storage yard, or on the top platform of an enclosed storage bin. A mobile discharging truck 2 that can move and travel is provided on the feeding belt conveyor 1. Materials are transported by the feeding belt conveyor 1 into the long strip-shaped storage yard or the shed of the enclosed storage bin, and then unloaded by the mobile discharging truck 2 through the chutes 22 on both sides of it, passing through the material dropping opening 31 of the discharging platform 3, and falling into the shed to form a stockpile 10 with a long discharging stroke H for storage. The discharging stroke H is usually more than 5m.

[0045] The intelligent following level detection device 4 is installed below the discharging platform 2. The intelligent following level detection device 4 includes an inspection track 41, a positioning and signal receiver 42, a driving motor 43, a level gauge 45, a camera 44, and a driving system, and the driving system can also be called a power supply system; the positioning and signal receiver 42 includes a positioning receiver and a signal receiver. The inspection track 41 is fixedly connected to the bottom surface of the discharging platform 3 and arranged throughout. The driving system supplies power to the driving motor 43, the positioning and signal receiver 42, and the level gauge 45. The positioning receiver is connected to the driving system. When the whole device moves, the position encoder on the positioning receiver can obtain the moving distance, so as to calculate the current position of the intelligent following level detection device 4, and then compare it with the position of the mobile discharging truck 2 to know whether the intelligent following level detection device 4 is in the normal working position. The signal transmitting device 21 and the signal receiver use Bluetooth signals for positioning; preferably, according to different working conditions, WIFI positioning technology, uwb positioning technology, and 5G positioning signals can be used; the power supply system uses a drag cable for power supply, and preferably, it can be replaced by a sliding contact wire for power supply. The level gauge 45 uses a radar level gauge, and preferably, according to different working conditions, ultrasonic and laser level gauges can be used. A Gray bus position detection device is installed on the mobile discharging truck 2 for precise positioning of the discharging truck. Anti-blocking protection switches are installed on the chutes 22 on both sides of the discharging truck to prevent material blockage.

[0046] For the long discharging stroke level detection device of this embodiment, when the mobile discharging truck 2 moves, the signal transmitting device 21 installed on the discharging truck emits a signal to the intelligent following level detection device 4, and the intelligent following level detection device 4 can obtain the position of the mobile discharging truck 2 through the positioning and signal receiver 42 to detect the material dropping point.

[0047] The drive motor 43 on the intelligent following level detection device 4 drives the level gauge 45 to move together with the mobile unloading truck 2. When the mobile unloading truck 2 starts to distribute materials, the materials fall into the storage yard through the long strip-shaped grid opening of the unloading platform 3. The intelligent following level detection device 4 below the unloading platform 3 monitors the real-time level height and feeds back the signal to the control room. When the accumulated height of the materials at the falling point reaches the preset maximum level height, the intelligent following level detection device alarms, and the mobile unloading truck moves forward to continue distributing materials, thus achieving the automation of the unloading process and realizing unattended operation. The camera 44 on the intelligent following level detection device 4 can scan the material piles in the raw material yard to detect and monitor the raw material reserves online.

[0048] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention. The actual structure and manufacturing steps are not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments to this technical solution without creative work without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A material level detection device for a long unloading stroke, comprising a control room, characterized in that: It also includes an intelligent follow-up material level detection device (4) and a signal transmitting device (21), wherein: The signal transmitting device (21) is installed on the mobile unloading vehicle (2); The intelligent follow-up material level detection device (4) comprises a positioning and signal receiver (42) and a material level meter (45); The positioning and signal receiver (42) and the material level meter (45) move together with the mobile unloading vehicle (2) below the unloading platform (3); the positioning and signal receiver (42) is connected to the signal transmitter (21); and the positioning and signal receiver (42) and the material level meter (45) are both connected to the control room signal.

2. The long unloading stroke material level detection device according to claim 1 is characterized in that: The intelligent following material level detection device (4) further comprises: An inspection track (41) is fixedly connected to the bottom surface of the unloading platform (3); A roller frame (40) is rollingly connected to the inspection track (41) via a roller (46) installed in the roller frame (40); The driving motor (43) drives the roller (46) to rotate. The driving motor (43) and the positioning and signal receiver (42) are fixedly connected to the roller frame (40); and the material level meter (45) is fixedly connected to the bottom of the roller frame (40).

3. The long unloading stroke material level detection device according to claim 2 is characterized in that: The intelligent follow-up material level detection device (4) also includes a camera (44) fixedly connected to the bottom of the roller frame (40), and the camera (44) is connected to the control room signal.

4. The long unloading stroke material level detection device according to claim 2 is characterized in that: The distance between the intelligent follow-up material level detection device (4) and the material discharge opening (31) provided on the material discharge platform (3) is 1.0 to 1.8 m.

5. The long unloading stroke material level detection device according to claim 4 is characterized in that: The material discharge opening (31) is a long strip grille opening, and the chute (22) of the mobile unloading vehicle (2) discharges the material directly facing the grille opening.

6. The long discharge stroke material level detection device according to any one of claims 1 to 5, characterized in that: The signal transmitting device (21) and the positioning and signal receiver (42) use Bluetooth signals for positioning.

7. A detection method for a material level detection device with a long discharge stroke according to any one of claims 1 to 6, characterized in that: When the mobile unloading vehicle (2) on the feeding belt conveyor (2) moves, the signal transmitting device (21) sends a signal to the intelligent following material level detection device (4); The intelligent follow-up material level detection device (4) moves together with the mobile unloading vehicle (2); When the mobile unloading vehicle (2) starts to distribute the materials, the materials fall into the material pile (10) in the storage yard through the material drop opening (31) provided on the unloading vehicle platform (3); The material level meter (45) monitors the material level of the material pile (10) in real time and feeds back the signal to the control room; When the height of the material pile (10) at the material placement point reaches a preset maximum material level, the intelligent follow-up material level detection device (4) sounds an alarm, and the mobile unloading vehicle (2) moves forward to continue distributing the material.

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