Material level detection device of car dumper hopper
By designing high-level and low-level detection mechanisms on the overturner hopper, and using radar level gauge and stress sensor for contactless measurement, the problems of dust and impact are solved, and the accuracy of detection and the protection of the instrument are achieved.
Patent Information
- Application Number
- CN202421130415.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-22
AI Technical Summary
In harsh environments, the overturner hopper has problems of high dust concentration and frequent impacts in material detection, resulting in inaccurate detection of the measuring instrument and easy to damage.
A material level detection device including a high-level detection mechanism and a low-level detection mechanism is designed, and contactless measurement is performed using a radar level gauge and a stress sensor. Through the arrangement of vertical walls and inclined walls, a light vibration partition and a light Vibration fill layer reduces dust influence and vibration interference, and avoids direct contact and contamination.
It realizes accurate detection of the high and low levels of the hopper material in harsh environments, reduces the damage and maintenance difficulty of the measuring instrument, and improves the reliability and cleanliness of the inspection.
Smart Images
Figure CN222203554U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hopper material level detection, in particular to a material level detection device for a dumper hopper. Background Art
[0002] The working area of the dumper hopper has a harsh working environment with heavy dust, coal impact, water mist, etc. The working conditions are very complex and the on-site working conditions are very harsh. Therefore, in order to ensure the accuracy and reliability of material detection, the following problems in the material detection of the dumper must be solved: the coal dust concentration in the dumper hopper area is very high during unloading, and the instrument needs strong penetration ability; the dumper performs dumping and unloading operations periodically, and the workload is very large. The hopper area is subjected to high-frequency and high-impact coal impacts, and large pieces of coal directly hit the measuring instrument. Utility Model Content
[0003] The utility model aims to provide a material level detection device for a dumper hopper, which can respectively detect the high and low material levels of the dumper hopper, is not affected by dust, and can reduce damage to measuring instruments.
[0004] To achieve the above-mentioned purpose, the utility model provides a material level detection device for a dumper hopper, the hopper having vertical walls and inclined walls arranged relatively to each other, comprising a controller, a high material level detection mechanism and a low material level detection mechanism, the high material level detection mechanism comprising a radar material level meter and a material level meter fixing tooling, the radar material level meter being arranged in the material level meter fixing tooling, the material level meter fixing tooling being fixed to the external top end of the vertical wall, the low material level detection mechanism being arranged at the internal bottom end of the inclined wall, the low material level detection mechanism comprising a stress sensor and a stress contact plate.
[0005] Preferably, the level meter fixing tooling includes an outer protective tube and a fixed bottom plate. The outer protective tube is a truncated cylindrical shape, a measuring mounting hole is arranged on the vertical wall, a fixing ring is arranged around the bottom surface of the outer protective tube, the fixing ring is fixed around the measuring mounting hole, the angle between the axis of the outer protective tube and the vertical wall is an acute angle, the fixed bottom plate is arranged in the outer protective tube and is perpendicular to the axis of the outer protective tube, a radar measuring hole is arranged in the center of the fixed bottom plate, a fixing seat is arranged around the upper part of the radar measuring hole, the detection head of the radar level meter is connected to the fixing seat, and the top end of the radar level meter is arranged in the outer protective tube.
[0006] Preferably, a vibration-absorbing insulation layer is provided between the outer protective tube and the vertical wall, and a vibration-absorbing filling layer is provided around the radar level meter.
[0007] Preferably, a closed ring consisting of four contact fixings is provided at the inner bottom end of the inclined wall, the edge of the stress contact plate is fixed on the closed ring, the stress sensor is provided on the detachment plate, the detachment plate is fixedly connected to the outer bottom end of the inclined wall, the stress sensor passes through an inspection hole provided at the bottom end of the inclined wall and contacts with the stress contact plate, and the stress sensor is located inside the closed ring.
[0008] Preferably, the radar level meter and the stress sensor are respectively connected to an analog-to-digital converter, which is electrically connected to the controller. The analog-to-digital converter receives analog signals from the radar level meter and the stress sensor and converts them into digital signals, which are then input into the controller.
[0009] Therefore, the utility model adopts a material level detection device for a dumper hopper of the above-mentioned structure, which measures the high material level of the material in a contactless manner through a high material level detection mechanism arranged outside the hopper, and measures the low material level of the material based on stress through a low material level detection mechanism arranged inside the hopper. The measurement result is not affected by dust, and direct contact between the measuring instrument and the material is avoided, which facilitates cleaning, maintenance and disassembly and assembly of the measuring instrument.
[0010] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of an embodiment of a material level detection device for a dumper hopper of the utility model;
[0012] Figure 2 This is a schematic diagram of the hopper structure of an embodiment of the utility model;
[0013] Figure 3 This is a schematic diagram of a high material level detection mechanism according to an embodiment of the utility model;
[0014] Figure 4 This is a schematic diagram of a low material level detection mechanism according to an embodiment of the present utility model;
[0015] Figure 5 This is a schematic diagram of the installation position of the stress sensor according to an embodiment of the utility model.
[0016] Reference numerals
[0017] 1. Hopper; 11. Inclined wall; 12. Grille; 13. Vertical wall; 14. Measuring and mounting hole; 2. High material level detection mechanism; 21. Outer protective tube; 22. Radar level meter; 23. Fixed bottom plate; 24. Fixed ring; 25. Fixed seat; 3. Low material level detection mechanism; 31. Breakaway plate; 32. Stress sensor; 33. Stress contact plate; 34. Contact fixing piece. DETAILED DESCRIPTION
[0018] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.
[0019] Example
[0020] As shown in the figure, a material level detection device for a dumper hopper includes a controller, a high material level detection mechanism 2 and a low material level detection mechanism 3. The hopper 1 has a vertical wall 13 and an inclined wall 11 arranged opposite to each other, and a grid 12 is arranged on the top of the hopper 1.
[0021] The high material level detection mechanism 2 includes a radar level meter 22 and a level meter fixing fixture. The radar level meter 22 is arranged in the level meter fixing fixture. The level meter fixing fixture is fixed to the outer top of the vertical wall 13, close to the grid 12. The radar level meter 22 can use a VEGAPULS 69 radar sensor with a measurement frequency of 80 GHz, which can measure the level of all solid materials, even in a dusty environment.
[0022] The level meter fixing tooling includes an outer protective tube 21 and a fixed bottom plate 23. The outer protective tube 21 is a truncated cylindrical shape. A measuring installation hole 14 is provided on the vertical wall 13. A fixing ring 24 is provided around the bottom surface of the outer protective tube 21. The fixing ring 24 is fixed around the measuring installation hole 14. The angle between the axis of the outer protective tube 21 and the vertical wall 13 is an acute angle, so that the radar level meter 22 is tilted downward. The fixed bottom plate 23 is arranged in the outer protective tube 21 and is perpendicular to the axis of the outer protective tube 21. A radar measuring hole is provided in the center of the fixed bottom plate 23. A fixing seat 25 is provided around the upper part of the radar measuring hole. The detection head of the radar level meter 22 is connected to the fixing seat 25, and the top of the radar level meter 22 is arranged in the outer protective tube 21. For the model with an external thread on the detection head of the radar level meter 22, an internal thread is provided on the fixing seat 25, so that the radar level meter 22 can be threadedly connected with the fixing seat 25. For other models, a suitable fixing method can be adopted.
[0023] A vibration-absorbing layer is provided between the outer protective tube 21 and the vertical wall 13, and a vibration-absorbing filling layer is provided around the radar level meter 22. Since the hopper 1 works frequently and generates vibration when bearing materials, the vibration-absorbing layer and the vibration-absorbing filling layer are provided to reduce the interference of vibration on the radar level meter 22.
[0024] The low material level detection mechanism 3 is arranged at the inner bottom end of the inclined wall 11. The coal material has the maximum contact stress with the inclined wall 11, and the contact stress is related to the material level. The low material level detection mechanism 3 includes a stress sensor 32 and a stress contact plate 33. A closed ring composed of four contact fixing members 34 is arranged at the inner bottom end of the inclined wall 11, and the edge of the stress contact plate 33 is fixed on the closed ring. The stress sensor 32 is arranged on the detachment plate 31, and the detachment plate 31 is fixedly connected to the outer bottom end of the inclined wall 11. The stress sensor 32 passes through the inspection hole arranged at the bottom end of the inclined wall 11 and contacts with the stress contact plate 33. The stress sensor 32 is located in the closed ring. The closed ring can prevent the material from directly contacting the stress sensor 32 to cause damage, and prevent the stress sensor 32 from being contaminated by coal dust. The stress sensor 32 can be inspected or replaced by removing the detachment plate 31.
[0025] When the material accumulates at the bottom of the hopper 1, it will inevitably generate pressure on the stress contact plate 33. The stress contact plate 33 will undergo a slight deformation to generate stress. The stress response formed at different material levels is also different, causing the stress sensor 32 to generate corresponding readings. A mathematical relationship is established between the stress reading of the stress sensor 32 and the material level. The stress value corresponding to the lowest material level is set as the lowest threshold of the stress sensor 32, and the lowest material level can be sensed. The installation position of the stress sensor 32 can be as follows: Figure 5 In order to pursue the accuracy of measurement, a method of simultaneously measuring with multiple sensors 32 and obtaining a joint value can also be adopted. The calculation method of the joint value is related to the distribution method of the stress sensors 32.
[0026] The radar level meter 22 and the stress sensor 32 are respectively connected to an analog-to-digital converter, which is electrically connected to the controller. The analog-to-digital converter receives analog signals from the radar level meter 22 and the stress sensor 32 and converts them into digital signals, which are then input into the controller.
[0027] Therefore, the utility model adopts a material level detection device of the dumper hopper 1 of the above-mentioned structure, which measures the high material level of the material in a contactless manner through a high material level detection mechanism 2 arranged outside the hopper 1, and measures the low material level of the material based on stress through a low material level detection mechanism 3 arranged in the hopper 1, thereby avoiding direct contact between the measuring instrument and the material and facilitating cleaning, maintenance and disassembly and assembly of the measuring instrument.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.
Claims
1. A material level detection device for a dumper hopper, the hopper having vertical walls and inclined walls arranged opposite to each other, characterized in that: It includes a controller, a high material level detection mechanism and a low material level detection mechanism. The high material level detection mechanism includes a radar level meter and a level meter fixing tool. The radar level meter is arranged in the level meter fixing tool. The level meter fixing tool is fixed on the external top end of the vertical wall. The low material level detection mechanism is arranged on the internal bottom end of the inclined wall. The low material level detection mechanism includes a stress sensor and a stress contact plate.
2. The material level detection device for a dumper hopper according to claim 1, characterized in that: The level meter fixing tooling includes an outer protective tube and a fixed bottom plate. The outer protective tube is a truncated cylindrical shape. A measuring mounting hole is arranged on the vertical wall. A fixing ring is arranged around the bottom surface of the outer protective tube. The fixing ring is fixed around the measuring mounting hole. The angle between the axis of the outer protective tube and the vertical wall is an acute angle. The fixed bottom plate is arranged in the outer protective tube and is perpendicular to the axis of the outer protective tube. A radar measuring hole is arranged in the center of the fixed bottom plate. A fixing seat is arranged around the upper part of the radar measuring hole. The detection head of the radar level meter is connected to the fixing seat. The top of the radar level meter is arranged in the outer protective tube.
3. The material level detection device for a dumper hopper according to claim 1, characterized in that: A vibration-absorbing layer is arranged between the outer protection tube and the vertical wall, and a vibration-absorbing filling layer is arranged around the radar level meter.
4. The material level detection device for a dumper hopper according to claim 1, characterized in that: A closed ring consisting of four contact fixings is provided at the inner bottom end of the inclined wall, the edge of the stress contact plate is fixed on the closed ring, the stress sensor is provided on the detachment plate, the detachment plate is fixedly connected to the outer bottom end of the inclined wall, the stress sensor passes through an inspection hole provided at the bottom end of the inclined wall and contacts the stress contact plate, and the stress sensor is located inside the closed ring.
5. The material level detection device for a dumper hopper according to claim 1, characterized in that: The radar level meter and the stress sensor are respectively connected to the analog-to-digital converter, which is electrically connected to the controller. The analog-to-digital converter receives analog signals from the radar level meter and the stress sensor and converts them into digital signals, which are then input into the controller.