Ultrasonic coal blockage detection device

Abstract

The utility model relates to the technical field of devices, and discloses an ultrasonic coal blockage detection device which comprises a conveying belt body, a coal falling barrel, a mounting bracket, an adjusting mechanism and an ultrasonic detection device, the top end of the coal falling barrel is fixedly connected with the mounting bracket, and the mounting bracket is connected with the adjusting mechanism. The ultrasonic detection device comprises an ultrasonic transmitting device and an ultrasonic receiving device, the ultrasonic transmitting device is installed on the installation support, and the ultrasonic receiving device is installed at the bottom end of the coal falling barrel. And the position of the ultrasonic sensor can be adjusted to improve the detection efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of detection devices, and in particular to an ultrasonic coal blocking detection device. Background Art

[0002] In bulk port operations, coal is often transported by belt conveyors, where a coal drop bucket is set at the end of each level of the coal conveyor belt, and the coal is transferred to the next level of the belt by the coal drop bucket. In actual production activities, due to uneven distribution of materials on the belt or high humidity of coal powder, the coal drop port of the belt conveyor is frequently blocked, which eventually causes the coal conveyor belt to shut down. The coal material thrown out of the coal drop bucket due to coal blockage needs to be manually cleaned and shoveled back to the belt by workers, which not only causes coal loss, but also reduces coal transportation efficiency and increases labor costs. Therefore, it is necessary to use a detection device to detect the state of the coal drop port to determine whether coal blockage occurs.

[0003] Existing coal drop port blockage detection devices usually use pressure sensors for detection, but in actual use, since the coal will be washed with water during the mining process, long-term use can easily damage the sensor; Prior art, such as the belt coal drop port blockage detection device with patent number CN 116853792 A, uses infrared detection of coal blockage, but the detection distance required for infrared detection is large, the detection accuracy near the coal drop port is low, and the cost of the infrared detection device is high; Prior art, such as the coal blockage detection device with patent number CN208916147U, uses a digital camera for shooting and detection, and the analysis process is complicated, and the accuracy is greatly affected by the coal delivery volume and light.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the application and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in the field. Summary of the invention

[0005] The utility model aims to provide an ultrasonic coal blockage detection device, which uses an ultrasonic sensor to detect coal blockage and is not affected by light and dust, is more suitable for operation in a port environment, and the position of the ultrasonic sensor can be adjusted to improve detection efficiency.

[0006] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions:

[0007] An ultrasonic coal blockage detection device comprises a coal drop shaft, a mounting bracket, an adjustment mechanism, and an ultrasonic detection device. The top of the coal drop shaft is fixedly connected to the mounting bracket, and the mounting bracket is connected to the adjustment mechanism for adjusting the ultrasonic detection device. The ultrasonic detection device comprises an ultrasonic transmitting device and an ultrasonic receiving device. The ultrasonic transmitting device is mounted on the mounting bracket, and the ultrasonic receiving device is mounted on the bottom of the coal drop shaft.

[0008] Optionally, a conveyor belt body is installed at the top and bottom ends of the coal drop shaft respectively.

[0009] Optionally, the mounting bracket includes two first mounting blocks and one second mounting block, the first mounting blocks are symmetrically arranged on two sides of the outer periphery of the top of the coal chute, and the second mounting block is installed on the other side of the outer periphery of the top of the coal chute. The second mounting block is connected to a connecting frame, an adjustment mechanism is connected below the connecting frame, and an ultrasonic emitting device is installed on the adjustment mechanism.

[0010] Optionally, the adjustment mechanism includes an electric telescopic rod, a mounting plate and a telescopic push rod, the electric telescopic rod is fixedly connected to the connecting frame, the bottom end of the electric telescopic rod is connected to the mounting plate, one end of the telescopic push rod is fixedly connected to the first mounting block, the other end of the telescopic push rod is connected to the lower surface of the mounting plate, and the ultrasonic emitting device is fixedly connected in the middle of the lower surface of the mounting plate.

[0011] Optionally, the ultrasonic transmitting device is specifically an ultrasonic probe.

[0012] Optionally, the ultrasonic receiving device includes a detection slot, a signal window, a warning light and an ultrasonic receiver. The detection slot is fixedly installed at the bottom of the coal drop shaft, the ultrasonic receiver is installed inside the detection slot, a signal window is provided on the surface of the detection slot, and a warning light is provided on the ultrasonic receiver.

[0013] Optionally, a high-pass filter and a low-pass filter are installed in the ultrasonic receiving device to only receive sound waves with a frequency in the range of 20-26 kHz.

[0014] Optionally, the ultrasonic receiving device, the conveyor belt body and the adjusting mechanism are controlled and adjusted by PLC.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The transmitting port of the ultrasonic transmitter faces the coal drop port of the coal drop shaft, and the ultrasonic receiver is installed at the bottom of the coal drop shaft. The ultrasonic transmitter continuously transmits ultrasonic waves to the coal drop shaft. If the coal drop port is not blocked, the ultrasonic wave reaches the bottom of the coal drop port through the coal drop port and is received by the ultrasonic receiver to generate a prompt signal. The ultrasonic sensor is used to detect coal blockage, which is not affected by light and dust and is more suitable for operation in port environments.

[0017] The position of the ultrasonic emitting device is adjusted by the adjusting mechanism to ensure that the ultrasonic emitting device is located at the best position for emission and is not affected by the emission angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present disclosure 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 disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an ultrasonic coal blocking detection device of the utility model;

[0020] Figure 2 The utility model is a circuit control schematic diagram of an ultrasonic coal blocking detection device.

[0021] Description of reference numerals:

[0022] 1. Conveyor belt body; 2. Coal drop bucket; 3. Mounting bracket; 31. First mounting block; 32. Second mounting block; 33. Connecting frame; 4. Electric telescopic rod; 5. Mounting plate; 6. Telescopic push rod; 7. Ultrasonic transmitting device; 8. Detection slot; 9. Ultrasonic receiver; 10. Signal window. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Example

[0024] An ultrasonic coal blocking detection device, such as Figure 1As shown, it includes a coal drop shaft 2, a mounting bracket 3, an adjustment mechanism, and an ultrasonic detection device. The top of the coal drop shaft 2 is fixedly connected to the mounting bracket 3, and the mounting bracket 3 is connected to the adjustment mechanism for adjusting the ultrasonic detection device. The ultrasonic detection device includes an ultrasonic transmitting device 7 and an ultrasonic receiving device. The ultrasonic transmitting device 7 is installed on the mounting bracket 3, and the ultrasonic receiving device is installed at the bottom of the coal drop shaft 2. The transmitting port of the ultrasonic transmitting device 7 faces the coal drop port of the coal drop shaft 2, and the ultrasonic receiving device is installed at the bottom of the coal drop shaft 2. The ultrasonic transmitting device 7 continuously transmits ultrasonic waves to the coal drop shaft 2. If the coal drop port is not blocked, the ultrasonic wave reaches the bottom of the coal drop port through the coal drop port, and generates a prompt signal after being received by the ultrasonic receiving device. The ultrasonic sensor is used to detect the coal blockage, which is not affected by light and dust and is more suitable for operation in a port environment. The position of the ultrasonic transmitting device 7 is adjusted by the adjustment mechanism to ensure that the ultrasonic transmitting device 7 is located at the best position for transmission and is not affected by the transmission angle.

[0025] like Figure 1 As shown, a conveyor belt body 1 is installed at the top and bottom of the coal dropping shaft 2 respectively. The coal is transported into the coal dropping shaft 2 by the conveyor belt body 1 and then transported away by the conveyor belt body 1.

[0026] The mounting bracket 3 includes two first mounting blocks 31 and one second mounting block 32. The first mounting blocks 31 are symmetrically arranged on both sides of the outer periphery of the top of the coal drop shaft 2. The second mounting block 32 is installed on the other side of the outer periphery of the top of the coal drop shaft 2. A connecting frame 33 is connected to the second mounting block 32. An adjusting mechanism is connected below the connecting frame 33. An ultrasonic emitting device 7 is installed on the adjusting mechanism. The adjusting mechanism is fixed by the connecting frame 33. The adjusting mechanism adjusts the ultrasonic emitting device 7 to the best position for emission.

[0027] The adjustment mechanism includes an electric telescopic rod 4, a mounting plate 5 and a telescopic push rod 6. The electric telescopic rod 4 is fixedly connected to the connecting frame 33. The bottom end of the electric telescopic rod 4 is connected to the mounting plate 5. One end of the telescopic push rod 6 is fixedly connected to the first mounting block 31. The other end of the telescopic push rod 6 is connected to the lower surface of the mounting plate 5. The ultrasonic emitting device 7 is fixedly connected in the middle of the lower surface of the mounting plate 5. The mounting plate 5 and the ultrasonic emitting position are adjusted by the electric telescopic rod 4 and the telescopic push rod 6.

[0028] The ultrasonic receiver 9 and the ultrasonic transmitter use the same ultrasonic probe, model EU24BOF23H14T, to send and receive ultrasonic signals.

[0029] The ultrasonic receiving device includes a detection slot 8, a signal window 10, a warning light and an ultrasonic receiver 9. The detection slot 8 is fixedly installed at the bottom end of the coal drop shaft 2. The ultrasonic receiver 9 is installed inside the detection slot 8. The signal window 10 is arranged on the surface of the detection slot 8. The ultrasonic receiver 9 is provided with a warning light. If the coal drop port is not blocked, the ultrasonic wave reaches the bottom of the coal drop port through the coal drop port and is received by the ultrasonic receiving device, then the green warning light turns on. If the coal drop port is blocked, the ultrasonic wave cannot pass through the coal drop shaft 2 smoothly to reach the bottom, then the ultrasonic wave cannot be detected by the ultrasonic receiving device, then the red warning light turns on.

[0030] A high-pass filter and a low-pass filter are installed in the ultrasonic receiving device to receive only sound waves with a frequency range of 20-26kHz, eliminating the interference of noisy environments on ultrasonic reception and ensuring the accuracy of detection. Example

[0031] Based on Example 1, an implementation method of an ultrasonic coal blocking detection device is provided:

[0032] The ultrasonic receiving device, the conveyor belt body 1 and the adjusting mechanism are controlled and adjusted by PLC.

[0033] Different from the first embodiment, in this embodiment, the PLC controller model is Siemens 1500. When the ultrasonic receiving device cannot receive ultrasonic waves, that is, the coal chute 2 is blocked, the ultrasonic receiving device will transmit the information to Siemens 1500 in real time. Siemens 1500 controls the coal conveying system to stop conveying coal to prevent the blockage from worsening and the waste of coal from overflowing.

[0034] Working process:

[0035] The first staff member controls the extension and retraction of the electric telescopic rod 4 through PLC, driving the ultrasonic emitting device 7 under the mounting plate 5 to move, and adjusts the ultrasonic emitting device 7 to a suitable position according to the on-site conditions. At the same time, the telescopic push rods 6 at both ends of the mounting plate 5 will also extend and retract accordingly, playing the role of auxiliary support, ensuring that the relative position of the ultrasonic emitting device 7 and the coal drop port remains stable.

[0036] When the ultrasonic monitoring device is turned on, the ultrasonic transmitting device 7 will continuously transmit ultrasonic waves in the direction of the coal drop port. At this time, an ultrasonic receiving device is set in the detection slot 8 at the bottom of the coal drop tube 2. When the ultrasonic receiving device receives the ultrasonic signal of the set value, the prompt light turns green, otherwise it turns red. The lighting situation can be observed through the external signal window 10. In addition, the ultrasonic receiving device will also feed back the information of whether the ultrasonic wave is received to the PCL end. If the ultrasonic signal cannot be detected, the PLC will trigger an alarm to remind the on-site staff to check the problem.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only used to explain the relative position relationship, movement, etc. between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0039] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An ultrasonic coal blocking detection device, characterized in that: The invention comprises a coal drop bucket (2), a mounting bracket (3), an adjustment mechanism, and an ultrasonic detection device. The top end of the coal drop bucket (2) is fixedly connected to the mounting bracket (3). The mounting bracket (3) is connected to the adjustment mechanism for adjusting the detection position of the ultrasonic detection device. The ultrasonic detection device comprises an ultrasonic transmitting device (7) and an ultrasonic receiving device. The ultrasonic transmitting device (7) is mounted on the mounting bracket (3), and the ultrasonic receiving device is mounted on the bottom end of the coal drop bucket (2).

2. The ultrasonic coal blocking detection device according to claim 1, characterized in that: A conveyor belt body (1) is respectively installed at the top and bottom ends of the coal drop bucket (2).

3. The ultrasonic coal blocking detection device according to claim 1, characterized in that: The mounting bracket (3) comprises two first mounting blocks (31), a second mounting block (32) and a connecting frame (33); the first mounting blocks (31) are symmetrically arranged on two outer circumference surfaces of the top of the coal drop shaft (2); the second mounting block (32) is mounted on the other outer circumference surface of the top of the coal drop shaft (2); the second mounting block (32) is connected to the connecting frame (33); an adjusting mechanism is connected below the connecting frame (33); and an ultrasonic emitting device (7) is mounted on the adjusting mechanism.

4. The ultrasonic coal blockage detection device according to claim 3 is characterized in that: The adjustment mechanism comprises an electric telescopic rod (4), a mounting plate (5) and a telescopic push rod (6); the electric telescopic rod (4) is fixedly connected to a connecting frame (33); the bottom end of the electric telescopic rod (4) is connected to the mounting plate (5); one end of the telescopic push rod (6) is fixedly connected to the first mounting block (31); the other end of the telescopic push rod (6) is connected to the lower surface of the mounting plate (5); and the ultrasonic emitting device (7) is fixedly connected to the middle of the lower surface of the mounting plate (5).

5. The ultrasonic coal blockage detection device according to claim 1, characterized in that: The ultrasonic emitting device (7) is specifically an ultrasonic probe.

6. The ultrasonic coal blockage detection device according to claim 1, characterized in that: The ultrasonic receiving device comprises a detection slot (8), a signal window (10), a warning light and an ultrasonic receiver (9); the detection slot (8) is fixedly mounted at the bottom end of the coal drop shaft (2); the ultrasonic receiver (9) is mounted inside the detection slot (8); a signal window (10) is arranged on the surface of the detection slot (8); and a warning light is arranged on the ultrasonic receiver (9).

7. The ultrasonic coal blocking detection device according to claim 6, characterized in that: The ultrasonic receiving device also includes a high-pass filter and a low-pass filter for filtering the ultrasonic waves emitted by the ultrasonic emitting device (7).

8. The ultrasonic coal blocking detection device according to claim 2, characterized in that: The ultrasonic receiving device, the conveyor belt body (1) and the adjusting mechanism are controlled and adjusted by PLC.

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