Coal level detection device for silo

Abstract

The utility model relates to the technical field of thermal power fire coal storage, and discloses a coal level detection device for a silo, laser level gauges are circumferentially and uniformly mounted in a silo main body, the laser level gauges are mounted in the silo main body in a lifting manner under the driving of a driving guide rail, the lower parts of the laser level gauges are provided with touch pressure sensors, and the touch pressure sensors are arranged on the lower parts of the laser level gauges. After installation, the sealing baffle is installed in the baffle sliding groove in a sliding mode, the sealing baffle seals the opening side of the sliding through groove, a plurality of average point positions are taken in the circumference of the silo body, the laser level gauges are installed at the point positions, the laser level gauges are driven to ascend and descend through the driving guide rail, and therefore the laser level gauges can move up and down along with the height of the coal level. According to the method, the actual value of the coal level in the silo body is accurately displayed, the coal level of a detection point is compared with an adjacent right coal level point through PLC logic, the distributor automatically stops at the position of the lower coal level point in the rotating walking process and supplements the coal level, and the coal level in the silo body is unified through the circulation.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power coal storage, in particular to a coal level detection device for a silo. Background Art

[0002] In the thermal power coal-fired industry, the coal bunker is the intermediate link in the production operation during the coal supply process. The coal supply to the coal bunker mainly relies on the silo ring type placing machine. At present, the silo ring type placing machine basically uses PLC automatic control. The placing machine travels at a fixed speed and replenishes the coal supply to the coal bunker by moving on the ring side at the top of the coal bunker.

[0003] Under normal circumstances, the coal stored in the coal bunker can be discharged smoothly by its own gravity without the help of external force. However, due to the influence of factors such as the quality of coal mined, dust reduction during transportation, crushing particle size, and temperature conditions, relying on the silo ring feeder to rotate and walk at a fixed speed to supply coal cannot keep the coal level in the silo in a balanced and flat state, which often leads to huge differences in the coal level in the silo and easily causes coal overflow at high coal points. Utility Model Content

[0004] The purpose of the utility model is to provide a coal level detection device for a silo to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal level detection device for a silo, comprising a detection mechanism installed inside a silo body, the detection mechanism comprising a driving guide rail, a sealing baffle and a laser level meter, a plurality of laser level meters are provided, and a plurality of the laser level meters are evenly installed inside the silo body in a circumferential shape, the laser level meter is driven by the driving guide rail to be lifted and installed inside the silo body, and a touch pressure sensor is provided at the bottom of the laser level meter;

[0006] The inner side of the silo body is evenly provided with sliding grooves for sliding installation of the laser level meter, and the side of the sliding groove is provided with a baffle groove. After installation, the sealing baffle is slidably installed inside the baffle groove, and the sealing baffle is closed on the opening side of the sliding groove.

[0007] Preferably, a driving screw is rotatably mounted in the middle of the front side of the driving guide rail, and a driving slider is threadedly connected to the upper portion of the driving screw.

[0008] Preferably, guide slide columns are fixed on both sides of the front portion of the driving guide rail, guide slide holes are provided on both sides of the middle portion of the driving slider, and the driving slider slides on the upper portion of the guide slide columns through the guide slide holes.

[0009] Preferably, a driving motor is fixed to the top of the driving guide rail, and the rotating shaft end of the driving screw is fixedly connected to the driving shaft end of the driving motor.

[0010] Preferably, a fixing block is fixed to the middle of the rear side of the sealing baffle, a fixing screw hole is provided at the rear of the fixing block, a fixing bolt is provided inside the fixing screw hole, and the fixing block is fixed to the front side of the driving slider by the fixing bolt.

[0011] Preferably, a level meter mounting seat is fixed to the middle of the front side of the sealing baffle, the laser level meter is fixedly mounted on the front of the level meter mounting seat through a bracket structure, and the touch pressure sensor is mounted on the middle of the bottom side of the laser level meter.

[0012] Preferably, the sliding groove and the baffle groove are both evenly arranged in a circular shape on the inner circumference of the silo body, the fixed connecting block is slidably engaged in the inner side of the sliding groove, and the sealing baffle is engaged and slid in the inner side of the baffle groove driven by the fixed connecting block, and the upper and lower end sides of the sealing baffle are provided with clearing slopes.

[0013] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0014] The detection device adopts a multi-point structure setting, takes multiple average points within the circumference of the silo main body, and installs a laser level meter at the point. The coal level in the silo main body is detected by the laser level meter, and the coal level distribution in the silo main body can be accurately known. The laser level meter adopts a liftable structure setting, and the laser level meter is lifted and driven by the driving guide rail, so that the laser level meter can move up and down with the height of the coal level to ensure that the actual value of the coal level inside the silo main body is accurately displayed, which greatly improves the detection accuracy of the device. The coal level of the detection point is compared with the adjacent right coal point through PLC logic. The placing machine automatically stops at the lower coal point position during the rotating walking process and fills the coal level. Such a cycle realizes the unification of the coal level in the silo main body. After the average control of the coal level in the silo main body, the coal storage of the silo main body can be maximized, which optimally solves the food problem of thermal power enterprises and prevents coal overflow at high coal points, which is conducive to coal supply operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1This is a schematic diagram of the overall installation distribution of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the detection mechanism of the utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the silo main body of the utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the detection mechanism and the silo body of the utility model;

[0020] Figure 5 This is a schematic diagram of the split structure of the detection mechanism of the utility model;

[0021] Figure 6 For the utility model Figure 5 Schematic diagram of the structure of the middle A area;

[0022] Figure 7 It is a schematic diagram of the rear structure of the sealing baffle of the utility model.

[0023] Explanation of the reference numerals: 1. Silo body; 2. Detection mechanism; 3. Drive guide rail; 4. Sealing baffle; 5. Laser level meter; 6. Drive screw; 7. Drive slider; 8. Guide slide column; 9. Drive motor; 10. Fixed connecting block; 11. Level meter mounting seat; 12. Clearing ramp; 13. Baffle slide groove; 14. Sliding groove; 15. Touch pressure sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. Example

[0026] See also Figure 1-7The utility model provides a technical solution: a coal level detection device for a silo, comprising a detection mechanism 2 installed inside a silo body 1, the detection mechanism 2 comprising a driving guide rail 3, a sealing baffle 4 and a laser level meter 5. In order to improve the accuracy of coal level detection, the laser level meter 5 is provided with multiple, such as the attached Figure 1 The figure shows the overall installation distribution diagram of the laser level meter 5. Specifically, in this embodiment, the number of laser level meters 5 is twelve. Twelve average points are taken within the circumference of the silo main body 1, and laser level meters 5 are installed at the points. The coal level in the silo main body 1 is detected by the laser level meter 5, and the coal level distribution in the silo main body 1 can be accurately known.

[0027] In order to facilitate the lifting and lowering drive of the laser level meter 5, as shown in the attached Figure 5 As shown, a driving screw rod 6 is rotatably installed in the middle of the front side of the driving guide rail 3, and a driving slider 7 is threadedly connected to the upper part of the driving screw rod 6. In order to improve the sliding stability of the driving slider 7, guide slide columns 8 are fixed on both sides of the front part of the driving guide rail 3. The guide slide columns 8 are smooth metal pillars. Guide slide holes are provided on both sides of the middle part of the driving slider 7. The driving slider 7 slides on the upper part of the guide slide columns 8 through the guide slide holes. In order to provide driving force, a driving motor 9 is fixed on the top of the driving guide rail 3. The driving motor 9 is a servo motor. The rotating shaft end of the driving screw rod 6 is fixedly connected to the driving shaft end of the driving motor 9, which can provide driving force for the rotation of the driving screw rod 6.

[0028] In order to facilitate the fixed installation with the driving slider 7, as shown in the attached Figure 7As shown, a fixed connecting block 10 is fixed in the middle of the rear side of the sealing baffle 4, and a fixing screw hole is provided at the rear of the fixed connecting block 10. A fixing bolt is provided inside the fixing screw hole. The fixed connecting block 10 is fixed to the front side of the driving slider 7 by the fixing bolt to realize the installation and fixation of the sealing baffle 4. In order to facilitate the installation of the laser level meter 5, a level meter mounting seat 11 is fixed in the middle of the front side of the sealing baffle 4. The laser level meter 5 is fixedly installed at the front of the level meter mounting seat 11 through a bracket structure. The laser level meter 5 is lifted and installed inside the silo body 1 under the drive of the driving guide rail 3, so that the laser level meter 5 can move up and down with the height of the coal level, so as to ensure the accurate display of the actual value of the coal level inside the silo body 1, which greatly improves the detection accuracy of the device. The coal level of the detection point is compared with the adjacent right coal point through the PLC logic. The material placing machine automatically stops at the lower coal point position during the rotating walking process and fills the coal level The coal level in the silo body 1 is uniform, and the coal level in the silo body 1 is uniformly controlled in this way, so that the coal storage capacity of the silo body 1 can be maximized. In order to sense the coal surface, the touch pressure sensor 15 is installed in the middle of the bottom side of the laser level meter 5. The touch pressure sensor 15 is a touch pressure sensor switch. When the laser level meter 5 moves down and contacts the coal surface, the information can be fed back to the central processing unit through the touch pressure sensor 15. The central processing unit is a PLC programming controller, which realizes the working control of the drive motor 9 through feedback control. For the power supply line, the power supply cable of the sensor is equipped with a sliding chain cable trough on the upper part of the silo body 1, and an isolation device is installed on the outside of the line to reduce AC interference. In view of the high power supply voltage and interference of the signal during transmission, two parallel reverse-arranged isolation modules are installed between the power supply and the instrument to solve the above problems, and shielded twisted pair cables are used for the signal lines, which have better anti-interference effect.

[0029] In order to facilitate the installation of the drive rail 3, as shown in the attached Figure 3 As shown, sliding grooves 14 for sliding installation of the laser level meter 5 are evenly arranged on the inner side of the silo body 1. In order to facilitate the sliding installation of the sealing baffle 4, a baffle slide groove 13 is arranged on the side of the sliding groove 14. The sliding groove 14 and the baffle slide groove 13 are both circumferentially evenly arranged on the inner circumference of the silo body 1. As the installation slot structure of the detection mechanism 2, the fixed connecting block 10 is slidably engaged with the inner side of the sliding groove 14. The sealing baffle 4 is engaged and slides on the inner side of the baffle slide groove 13 under the drive of the fixed connecting block 10. After installation, the sealing baffle 4 is closed on the opening side of the sliding groove 14 to prevent external coal slag from entering the interior of the moving parts. In order to facilitate the sealing baffle 4 to remove the coal slag in the baffle slide groove 13 when sliding, as shown in the attached Figure 6 As shown, cleaning slopes 12 are provided on both upper and lower ends of the sealing baffle 4 .

[0030] Working principle or structural principle, when working, the coal level in the silo main body 1 is detected by multiple laser level meters 5 distributed in the silo main body 1. During detection, the laser level meter 5 stays on the upper part of the coal surface, and the touch pressure sensor 15 at the bottom of the laser level meter 5 contacts the coal surface. After the silo main body 1 is supplied with coal, the coal surface in the silo main body 1 drops, and the touch pressure sensor 15 loses resistance. After feedback, the driving motor 9 is controlled by control, and the sealing baffle 4 is moved downward under the drive of the driving guide rail 3. When moving downward, the sealing baffle 4 is shielded on the outside of the sliding groove 14, and the opening side of the sliding groove 14 remains closed to prevent the entry of coal slag. At the same time, the laser level meter 5 moves down until the touch pressure sensor 15 contacts the coal surface again, and cooperates with the laser level meter 5 to detect the coal surface, so as to realize the accurate detection of the coal level in the silo body 1. When loading, the coal level of the detection point is compared with the adjacent right coal point through PLC logic. The material placing machine automatically stops at the lower coal point position during the rotating walking process and fills the coal level. After the coal filling operation is completed, the laser level meter 5 in the area moves up. After the laser level meter 5 detects that it is out of the coal surface, the laser level meter 5 moves down. Similarly, according to the above-mentioned coal surface detection steps, the coal level after coal filling is recalibrated, and the real-time detection of the coal level is completed in this cycle.

[0031] In summary, the detection device adopts a multi-point structure setting, takes multiple average points within the circumference of the silo main body 1, and installs a laser level meter 5 at the point. The coal level in the silo main body 1 is detected by the laser level meter 5, and the coal level distribution in the silo main body 1 can be accurately known. The laser level meter 5 adopts a liftable structure setting, and the laser level meter 5 is lifted and driven by the driving guide rail 3, so that the laser level meter 5 can move up and down with the height of the coal level to ensure that the actual value of the coal level inside the silo main body 1 is accurately displayed, which greatly improves the detection accuracy of the device. The coal level of the detection point is compared with the adjacent right coal point through PLC logic. The placing machine automatically stops at the lower coal point position during the rotating walking process and fills the coal level. Such a cycle realizes the unification of the coal level in the silo main body 1. After the average control of the coal level in the silo main body 1, the coal storage of the silo main body 1 can be maximized, the ration problem of thermal power enterprises can be optimally solved, and coal overflow at high coal points can be prevented, which is conducive to coal supply operations.

[0032] So far, the embodiments of the utility model have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0033] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal level detection device for a silo, comprising a detection mechanism (2) installed inside a silo body (1), characterized in that: The detection mechanism (2) comprises a driving guide rail (3), a sealing baffle (4) and a laser level meter (5); a plurality of the laser level meters (5) are provided, and a plurality of the laser level meters (5) are evenly installed in a circular shape inside the silo body (1); the laser level meter (5) is driven by the driving guide rail (3) to be lifted and installed inside the silo body (1); a touch pressure sensor (15) is provided at the bottom of the laser level meter (5); The inner side of the silo body (1) is evenly provided with sliding grooves (14) for sliding installation of the laser level meter (5), and the side of the sliding groove (14) is provided with a baffle groove (13). After installation, the sealing baffle (4) is slidably installed inside the baffle groove (13), and the sealing baffle (4) is closed at the opening side of the sliding groove (14).

2. A coal level detection device for a silo according to claim 1, characterized in that: A driving screw rod (6) is rotatably mounted on the middle portion of the front side of the driving guide rail (3), and a driving slider (7) is threadedly connected to the upper portion of the driving screw rod (6).

3. A coal level detection device for a silo according to claim 2, characterized in that: Guide slide columns (8) are fixed on both sides of the front of the driving guide rail (3), and guide slide holes are provided on both sides of the middle of the driving slide block (7), and the driving slide block (7) slides on the upper part of the guide slide column (8) through the guide slide holes.

4. A coal level detection device for a silo according to claim 3, characterized in that: A driving motor (9) is fixed to the top of the driving guide rail (3), and the rotating shaft end of the driving screw rod (6) is fixedly connected to the driving shaft end of the driving motor (9).

5. A coal level detection device for a silo according to claim 4, characterized in that: A fixing connecting block (10) is fixed to the middle of the rear side of the sealing baffle (4), a fixing screw hole is provided at the rear of the fixing connecting block (10), a fixing bolt is provided inside the fixing screw hole, and the fixing connecting block (10) is fixed to the front side of the driving slider (7) by means of the fixing bolt.

6. A coal level detection device for a silo according to claim 5, characterized in that: A material level meter mounting seat (11) is fixed to the middle of the front side of the sealing baffle (4); the laser material level meter (5) is fixedly mounted on the front of the material level meter mounting seat (11) via a bracket structure; and the touch pressure sensor (15) is mounted on the middle of the bottom side of the laser material level meter (5).

7. A coal level detection device for a silo according to claim 5, characterized in that: The sliding groove (14) and the baffle groove (13) are both circumferentially arranged evenly on the inner circumference of the silo body (1); the fixed connecting block (10) is slidably engaged with the inner side of the sliding groove (14); the sealing baffle (4) is slidably engaged with the inner side of the baffle groove (13) driven by the fixed connecting block (10); and the upper and lower ends of the sealing baffle (4) are both provided with cleaning inclined surfaces (12).

Images