Stock bin material level detection system

Abstract

The invention relates to the technical field of material level detection, in particular to a stock bin material level detection system which comprises a material transfer device installed at a lower opening of a stock bin, a force sensor arranged on the material transfer device and a controller connected with the force sensor, and the force sensor is arranged below the lower opening of the stock bin and used for detecting the pressure of materials in the stock bin. The force sensor is arranged at the lower opening of the stock bin to detect the pressure of the materials in the stock bin, then the material level in the stock bin is calculated through the controller, the influence of the severe internal environment of the stock bin is avoided, the detection precision is high, installation is convenient, and maintenance is easy.

Description

Technical Field

[0001] The invention relates to the technical field of material level detection, and in particular to a material silo material level detection system. Background Art

[0002] At present, silo storage is mostly used for the storage of bulk materials. During the loading and unloading process of the silo, it is necessary to determine the material level in the silo to ensure efficient and reliable operation of the storage and transfer system.

[0003] Especially in the coal bunkers in coal mines, because the coal blocks are large and the coal bunker is high, when the coal bunker is empty, large pieces of coal fall from the top of the coal bunker and directly hit the transfer equipment installed at the lower discharge port, which can easily cause damage to the lower equipment.

[0004] Traditional coal material detection methods are mostly carried out manually. Workers need to climb to the top of the silo to observe during production to understand the current status of the coal. This measurement method has poor measurement accuracy, low measurement efficiency, and high labor intensity. It cannot meet the current detection needs and lacks practicality.

[0005] At present, the silo level measurement equipment mainly includes ultrasonic, capacitive, heavy hammer and radar measurement methods. Ultrasonic and radar measurement schemes can realize non-contact measurement with high measurement accuracy, but they have high requirements for the silo environment and poor signal penetration ability. They cannot adapt well to the high dust concentration of the silo. In addition, due to the funnel shape at the bottom of the silo, the situation is complicated, and it is difficult for ultrasonic or radar to truly determine whether the silo is empty; the capacitive measurement scheme can achieve high-sensitivity measurement, but this scheme requires the dielectric constant of the measured material to be stable, and its probe is easy to stick to the contact material, resulting in damage or inaccurate detection results, and the service life is short. It is difficult for the capacitive probe to detect the empty silo at a long distance, and the probe is also easy to be smashed; the heavy hammer measurement scheme is a mechanical, contact measurement method, which has the characteristics of continuous measurement, simple method, and low cost, but because the heavy hammer must be in contact with the measured object during the measurement process, it is easy to be buried. In addition, the wire rope hanging the heavy hammer is also easy to break due to being hit by the measured object, so the reliability of this scheme is poor when working for a long time.

[0006] The existing method for detecting the internal material level height has low measurement accuracy, large errors, is difficult to install and maintain, and cannot meet the needs of safe industrial production. Summary of the invention

[0007] The present invention aims to provide a silo material level detection system in view of the shortcomings of the prior art, such as low measurement accuracy, large error, and difficulty in installation and maintenance.

[0008] The technical solution of the present invention is: a silo level detection system, including a material transfer device installed at the lower opening of the silo, a force sensor arranged on the material transfer device and a controller connected to the force sensor, wherein the force sensor is arranged below the lower opening of the silo to detect the pressure of the material in the silo.

[0009] The material transfer equipment comprises a belt feeder, the belt feeder comprises rollers, and the force sensors are arranged at both ends of the rollers of the belt feeder.

[0010] The material transfer equipment includes a material guide trough, which is provided with a movable side plate. One end of the force sensor is connected to the material guide trough body, and the other end supports the movable side plate. One end of the movable side plate is hinged to the material guide trough body, and the other end is supported by the force sensor. The force sensor can detect the pressure on the movable side plate.

[0011] A sealing member is provided between the material guiding trough body and the movable side plate.

[0012] The angle between the movable side plate and the horizontal plane is 0° to 90°.

[0013] The material transfer equipment is fixed to the equipment foundation, and the force sensor is arranged between the material transfer equipment and the equipment foundation to detect the pressure of the material in the silo on the material transfer equipment.

[0014] The equipment foundation is a hanging connector arranged at the lower mouth of the silo, the hanging connector is hung and connected to the material transfer equipment from the top, the force sensor is arranged between the material transfer equipment and the hanging connector, and the material transfer equipment is hung and installed under the silo through the force sensor.

[0015] The equipment foundation is a support member arranged under the silo, the support member supports and fixes the material transfer equipment from the bottom, and the force sensor is arranged between the material transfer equipment and the support member.

[0016] The beneficial effects of the present invention are: by arranging a force sensor at the lower opening of the silo to detect the pressure of the material in the silo, and then calculating the material level in the silo through the controller, the influence of the harsh internal environment of the silo is avoided, the detection accuracy is high, the installation is convenient, and the maintenance is easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a silo material level detection system in Example 1;

[0018] Figure 2 It is a structural schematic diagram of a silo material level detection system in Example 2;

[0019] Figure 3 yes Figure 2 Middle AA section view;

[0020] Figure 4 It is a structural schematic diagram of a silo material level detection system in Example 3;

[0021] Figure 5 It is a structural schematic diagram of a silo material level detection system in Example 3;

[0022] In the figure: 1-material transfer equipment, 1.1-belt feeder, 1.11-roller, 1.2-material guide trough, 1.21-material guide trough body, 1.22-movable side plate, 2-force sensor, 3-controller, 4-silo, 5-seal, 6-hanging connection, 7-support, α-angle between the movable side plate and the horizontal direction. DETAILED DESCRIPTION

[0023] The technical solutions in the present invention are described clearly and completely below in combination with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] A silo level detection system, such as Figure 1 As shown, it includes a material transfer device 1 installed at the lower end of a silo 4, a force sensor 2 arranged on the material transfer device 1, and a controller 3 connected to the force sensor 2. The force sensor 2 is arranged below the lower end of the silo 4 to detect the pressure of the material in the silo 4. The change in the material level height in the silo 4 also changes the pressure of the force sensor 2. The controller 3 receives the pressure signal of the force sensor 2 and can calculate the material level in the silo 4 through the pressure signal.

[0026] The material transfer equipment 1 includes a belt feeder 1.1, and the belt feeder 1.1 includes rollers 1.11. The force sensor 2 is arranged at both ends of the rollers 1.11 below the opening of the belt feeder 1.1. The force sensor 2 can detect the pressure of the material in the silo 4 on the rollers 1.11, and then calculate the material level height in the silo 4 to determine whether the silo is empty.

[0027] When in use, the standard data is first measured, and the pressure signal detected by the force sensor 2 corresponding to the material levels at different heights in the silo 4 is stored in the storage area of ​​the controller 3 as a standard value. In subsequent applications, the controller 3 compares the pressure signal detected by the force sensor 2 with the standard value of the storage area to calculate the corresponding material level height in the silo 4.

[0028] Example 2

[0029] A silo level detection system, such as Figure 2-Figure 3 As shown, it includes a material transfer device 1 installed at the lower end of a silo 4, a force sensor 2 arranged on the material transfer device 1, and a controller 3 connected to the force sensor 2. The force sensor 2 is arranged below the lower end of the silo 4 to detect the pressure of the material in the silo 4.

[0030] The material transfer equipment 1 includes a material guide trough 1.2, on which a movable side plate 1.22 is provided. One end of a force sensor 2 is connected to the material guide trough body 1.21, and the other end supports the movable side plate 1.22. One end of the movable side plate 1.22 is hinged to the material guide trough body 1.21, and the other end is supported by the force sensor 2. The force sensor 2 can detect the pressure on the movable side plate 1.22.

[0031] A sealing member 5 is provided between the guide trough body 1.21 and the movable side plate 1.22.

[0032] The angle α between the movable side plate and the horizontal direction is 0° to 90°.

[0033] The rest is the same as in Example 1.

[0034] Example 3

[0035] like Figure 4 As shown, the material transfer equipment 1 is fixed to the equipment foundation, and the force sensor 2 is arranged between the material transfer equipment 1 and the equipment foundation. The force sensor 2 detects the pressure of the material in the silo 4 on the material transfer equipment 1.

[0036] The equipment foundation is a hanging connector 6 arranged at the lower mouth of the silo 4, the hanging connector 6 is hung and connected to the material transfer equipment 1 from the top, the force sensor 2 is arranged between the material transfer equipment 1 and the hanging connector 6, and the material transfer equipment 1 is hung and installed under the silo 4 through the force sensor 2.

[0037] The rest is the same as in Example 1.

[0038] Example 4

[0039] like Figure 5 As shown, the material transfer equipment 1 is fixed to the equipment foundation, and the force sensor 2 is arranged between the material transfer equipment 1 and the equipment foundation to detect the pressure of the material in the silo 4 on the material transfer equipment 1.

[0040] The equipment foundation is a support member 7 arranged under the silo 4 , the support member 7 supports and fixes the material transfer equipment 1 from the bottom, and the force sensor 2 is arranged between the material transfer equipment 1 and the support member 7 .

[0041] The rest is the same as in Example 1.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A silo level detection system, comprising a material transfer device (1) installed at the lower opening of a silo (4), a force sensor (2) arranged on the material transfer device (1), and a controller (3) connected to the force sensor (2), characterized in that: The force sensor (2) is arranged below the lower opening of the silo (4) to detect the pressure of the material in the silo (4).

2. A silo level detection system according to claim 1, characterized in that: The material transfer equipment (1) comprises a belt feeder (1.1), the belt feeder (1.1) comprises rollers (1.11), and the force sensors (2) are arranged at both ends of the rollers (1.11) below the opening of the belt feeder (1.1).

3. A silo level detection system according to claim 1, characterized in that: The material transfer equipment (1) comprises a material guide trough (1.2), a movable side plate (1.22) is provided on the material guide trough (1.2), one end of the force sensor (2) is connected to the material guide trough body (1.21), and the other end supports the movable side plate (1.22), and the force sensor (2) can detect the pressure on the movable side plate (1.22).

4. A silo level detection system according to claim 3, characterized in that: A sealing member (5) is provided between the material guide trough body (1.21) and the movable side plate (1.22).

5. A silo level detection system according to claim 3 or 4, characterized in that: The angle (α) between the movable side plate (1.22) and the horizontal direction is 0° to 90°.

6. A silo level detection system according to claim 1, characterized in that: The material transfer equipment (1) is fixed to the equipment foundation, and the force sensor (2) is arranged between the material transfer equipment (1) and the equipment foundation to detect the pressure of the material in the silo (4) on the material transfer equipment (1).

7. A silo level detection system according to claim 6, characterized in that: The equipment foundation is a hanging connection piece (6) arranged at the lower opening of the silo (4), the hanging connection piece (6) is hung and connected to the material transfer equipment (1) from the top, the force sensor (2) is arranged between the material transfer equipment (1) and the hanging connection piece (6), and the material transfer equipment (1) is hung and installed under the silo (4) through the force sensor (2).

8. A silo level detection system according to claim 6, characterized in that: The equipment foundation is a support member (7) arranged under the silo (4), the support member (7) supports and fixes the material transfer equipment (1) from the bottom, and the force sensor (2) is arranged between the material transfer equipment (1) and the support member (7).

Images