Blockage detection device for coal conveying chute

Abstract

The utility model discloses a coal conveying chute blockage detection device, which comprises a pressure detection device, an ultrasonic sensor, a vibrator and an air cannon, the pressure detection device and the ultrasonic sensor are both arranged above a bending part of a chute, the pressure detection device and the ultrasonic sensor are respectively and oppositely arranged on the chute, and the vibrator is connected with the air cannon. The pressure detection device is located above the chute, and the ultrasonic sensor is located below the chute; the vibrator and the air cannon are respectively arranged on the chute below the bending part, the pressure detection device, the ultrasonic sensor, the vibrator and the air cannon are respectively and electrically connected with the controller, the pressure detection device is positioned above, the influence of coal impact on the detection precision is reduced, the ultrasonic sensor is positioned below, and the ultrasonic sensor is positioned below the controller. And moreover, the coal dust and the water vapor act synergistically, and the blockage is judged only when the coal dust and the water vapor detect the blockage at the same time, so that the accuracy of blockage judgment is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of mining detection technology, and in particular to a coal conveying chute blockage detection device. Background Technology

[0002] In coal conveying systems, coal chutes are one of the key conveying devices.

[0003] However, due to factors such as the stickiness and moisture content of coal and the conveying speed, material blockage can easily occur in the chute. Material blockage not only reduces conveying efficiency but may also lead to equipment damage or even safety accidents.

[0004] Existing blockage detection devices mostly use a single detection method, such as pressure detection or ultrasonic detection. However, single detection methods generally suffer from insufficient detection accuracy. For example, pressure detection judges whether there is blockage by the pressure caused by the blockage on the inner wall of the chute. However, during coal transportation, the impact of coal can affect the accuracy of pressure detection. Furthermore, interference factors such as coal dust and water vapor exist during coal transportation, which can also affect the accuracy of ultrasonic detection.

[0005] These single detection methods often suffer from insufficient accuracy and high false positive rates, making it impossible to accurately judge the coal conveying process.

[0006] Therefore, there is an urgent need for a coal chute blockage detection device that can accurately detect blockages in order to improve the reliability and safety of coal transportation. Utility Model Content

[0007] This utility model aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0008] To achieve the above objectives, the first aspect of this utility model provides a coal conveying chute blockage detection device, comprising: a pressure detection device, an ultrasonic sensor, a vibrator, and an air cannon. The pressure detection device and the ultrasonic sensor are both disposed above the bend of the chute, with the pressure detection device and the ultrasonic sensor respectively positioned opposite each other on the chute, the pressure detection device located above the chute, and the ultrasonic sensor located below the chute. The vibrator and the air cannon are respectively disposed on the chute below the bend. The pressure detection device, the ultrasonic sensor, the vibrator, and the air cannon are electrically connected to a controller.

[0009] In addition, the coal conveying chute blockage detection device proposed above according to this utility model may also have the following additional technical features:

[0010] As a further description of the above technical solution: the pressure detection device includes a mounting housing, a fixing plate, a pressure sensor, and an elastic sheet, wherein a mounting groove is provided above the bent portion of the chute, and the mounting housing is mounted on the mounting groove; the fixing plate is mounted inside the mounting housing; the pressure sensor is disposed on the side of the fixing plate near the mounting groove; the elastic sheet is disposed inside the mounting housing and embedded in the mounting groove; wherein the sensing end of the pressure sensor is close to the deformable end of the elastic sheet.

[0011] As a further description of the above technical solution: the ultrasonic sensor is detachably mounted on the chute via a strap.

[0012] As a further description of the above technical solution: the generating end of the air cannon is directly opposite the bent portion.

[0013] As a further description of the above technical solution: the air cannon includes an air tank, a solenoid valve, a nozzle, and a connecting pipe, wherein: the air tank is connected to the solenoid valve through the connecting pipe; the solenoid valve is connected to the nozzle through the connecting pipe; the nozzle is positioned opposite the bend of the chute and is used to spray compressed air into the blockage area.

[0014] As a further description of the above technical solution: the vibrator includes a motor, an eccentric block, and a fixed bracket, wherein the motor is fixed to the fixed bracket by bolts; the eccentric block is mounted on the output shaft of the motor; and the fixed bracket is fixed to the outer wall of the chute by welding or bolting.

[0015] As a further description of the above technical solution: the inner wall of the bent part of the chute is provided with a removable wear-resistant liner, which is fixed to the inner wall of the chute by bolts or slots.

[0016] As a further description of the above technical solution: the probe surface of the ultrasonic sensor is coated with a waterproof coating to reduce the impact of coal dust and water vapor on the detection accuracy.

[0017] According to the coal conveying chute blockage detection device of this utility model, the pressure detection device is located at the top, which reduces the impact of coal impact on detection accuracy, and the ultrasonic sensor is located at the bottom, which reduces the interference of coal dust and water vapor. Moreover, the two work together to effectively reduce the limitations of a single detection method. That is, blockage is only judged when both detect blockage at the same time, which significantly improves the accuracy of blockage judgment. In addition, the combination of intermittent air cannon impact and continuous vibrator vibration can effectively solve the blockage problem. The impact force of the air cannon can quickly break the blockage, while the continuous vibration of the vibrator can prevent the blockage from forming again and ensure smooth discharge.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of a coal conveying chute blockage detection device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of a coal conveying chute blockage detection device according to an embodiment of the present invention;

[0022] Figure 3 This is a partial enlarged structural diagram of A according to an embodiment of the present invention;

[0023] Figure 4 This is an exploded structural diagram of a pressure detection device according to an embodiment of the present invention;

[0024] As shown in the figure:

[0025] 100. Chute; 101. Bending section; 102. Mounting groove; 200. Pressure detection device; 210. Mounting housing; 220. Fixing plate; 230. Pressure sensor; 240. Elastic sheet; 300. Ultrasonic sensor; 301. Strap; 400. Vibrator; 500. Air cannon. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following description, in conjunction with the accompanying drawings, describes the coal conveying chute blockage detection device according to an embodiment of the present invention.

[0028] like Figures 1 to 4 As shown, the coal conveying chute blockage detection device of this utility model embodiment may include a pressure detection device 200, an ultrasonic sensor 300, a vibrator 400, and an air cannon 500.

[0029] The pressure detection device 200 and the ultrasonic sensor 300 are both located above the bend 101 of the chute 100. The pressure detection device 200 and the ultrasonic sensor 300 are respectively arranged opposite to each other on the chute 100, with the pressure detection device 200 located above the chute 100 and the ultrasonic sensor 300 located below the chute 100.

[0030] As one possible scenario, the ultrasonic sensor 300 is detachably mounted on the chute 100 via a strap 301.

[0031] The vibrator 400 and the air cannon 500 are respectively installed on the chute 100 below the bend 101.

[0032] It should be noted that the generating end of the air cannon 500 is directly opposite the bend 101. The bend 101 is a location in the chute 100 where material blockage is likely to occur. The air cannon 500 can disperse the coal material blocked in the bend 101.

[0033] In addition, the pressure detection device 200, ultrasonic sensor 300, vibrator 400 and air cannon 500 are electrically connected to the controller.

[0034] It should be noted that, through the preset procedures of the relevant personnel, the vibrator 400 and the air cannon 500 can only operate when material blockage occurs.

[0035] To clearly illustrate the previous embodiment, in one embodiment of this utility model, the pressure detection device 200 includes a mounting housing 210, a fixing plate 220, a pressure sensor 230, and an elastic sheet 240.

[0036] The chute 100 has an installation groove 102 above the bent portion 101. The installation housing 210 is installed on the installation groove 102. The fixing plate 220 is installed inside the installation housing 210. The pressure sensor 230 is located on the side of the fixing plate 220 near the installation groove 102. The elastic sheet 240 is located inside the installation housing 210 and embedded in the installation groove 102.

[0037] It should be noted that the pressure sensor 230 is located on the side of the fixed plate 220 near the mounting groove 102. During the normal coal conveying process, it can further reduce the false judgments caused by some coal bouncing and hitting the elastic sheet 240. Only when coal accumulates and blocks the flow will the elastic sheet 240 deform and come into contact with the pressure sensor 230 to squeeze the pressure sensor 230, thereby further improving the reading accuracy of the pressure sensor 230.

[0038] The sensing end of the pressure sensor 230 is close to the deformable end of the elastic sheet 240.

[0039] Specifically, when detecting coal blockage, the relevant personnel install the pressure detection device 200 in the mounting groove 102 above the bend 101 of the chute 100, fix the ultrasonic sensor 300 to the bottom of the chute 100 with the strap 301, adjust its position and angle to ensure that the ultrasonic signal can accurately detect the coal accumulation height, install the vibrator 400 and the air cannon 500 on the chute 100 below the bend 101, and connect them to the controller respectively.

[0040] During the coal transportation process, the pressure detection device 200 monitors the pressure changes in the chute 100 in real time, and the ultrasonic sensor 300 monitors the coal accumulation height in real time.

[0041] When neither the pressure detection device 200 nor the ultrasonic sensor 300 detects material blockage, the device is in standby mode.

[0042] When a blockage occurs in the chute 100, the coal accumulation will exert pressure on the elastic sheet 240, causing the elastic sheet 240 to deform and squeeze the pressure sensor 230. This allows the controller to obtain the pressure data from the pressure sensor 230. When the pressure detection device 200 detects that the pressure exceeds the set threshold and the ultrasonic sensor 300 detects that the coal accumulation height exceeds the set threshold, the controller determines that a blockage has occurred.

[0043] At this time, the controller triggers the vibrator 400 and the air cannon 500 to work. The vibrator 400 vibrates continuously to loosen the blockage, and the air cannon 500 intermittently sprays compressed air to impact the blockage.

[0044] Once the blockage is cleared, the signals from the pressure detection device 200 and the ultrasonic sensor 300 return to normal, and the controller stops the operation of the vibrator 400 and the air cannon 500.

[0045] In one embodiment of the present invention, the air cannon 500 includes an air tank, a solenoid valve, a nozzle, and a connecting pipeline.

[0046] The air storage tank is connected to a solenoid valve via a connecting pipe, and the solenoid valve is connected to a nozzle via a connecting pipe. The nozzle is positioned directly opposite the bend 101 of the chute 100 and is used to spray compressed air into the blockage area.

[0047] It should be noted that when the controller detects a blockage, it opens the solenoid valve, and the compressed air in the air tank flows rapidly to the nozzle through the connecting pipe. The compressed air is ejected from the nozzle at high speed, forming an impact force that directly acts on the blockage area of ​​the bend 101 of the chute 100, causing the blockage to loosen and flow.

[0048] In addition, the triggering interval and impact intensity of the air cannon 500 can be adjusted by the controller to meet the needs of different degrees of material blockage.

[0049] To clearly illustrate the previous embodiment, in one embodiment of this utility model, the vibrator 400 includes a motor, an eccentric block, and a fixed bracket.

[0050] The motor is fixed to the fixed bracket by bolts, the eccentric block is installed on the output shaft of the motor, and the fixed bracket is fixed to the outer wall of the chute 100 by welding or bolt connection.

[0051] It should be noted that when the controller detects a blockage, it starts the motor, which drives the eccentric block to rotate. The centrifugal force generated by the rotation of the eccentric block causes the vibrator 400 to vibrate. The vibration is transmitted to the outer wall of the chute 100 through the fixed bracket. The vibration loosens the coal in the chute 100, promotes the flow of coal, and thus clears the blockage.

[0052] In one embodiment of the present invention, the inner wall of the bent portion 101 of the chute 100 is provided with a detachable wear-resistant liner, which is fixed to the inner wall of the chute 100 by bolts or slots.

[0053] It should be noted that during the material conveying process, the bend 101 of the chute 100 is a key part where the material flow direction changes. The impact and friction between the material and the inner wall of the chute 100 increase significantly at this point. The wear-resistant liner is made of high-hardness and wear-resistant material, which can withstand the strong scouring and friction of the material, effectively preventing the inner wall of the chute 100 from directly contacting the material, thereby protecting the chute 100 body from rapid wear.

[0054] In one embodiment of this invention, the probe surface of the ultrasonic sensor 300 is coated with a waterproof coating to reduce the impact of coal dust and water vapor on detection accuracy.

[0055] In summary, according to the coal chute blockage detection device of this utility model embodiment, the pressure detection device 200 is located at the top, reducing the impact of coal impact on detection accuracy, while the ultrasonic sensor 300 is located at the bottom, reducing interference from coal dust and water vapor. Moreover, the synergistic effect of the two can effectively reduce the limitations of a single detection method, that is, blockage is only judged when both detect blockage simultaneously, significantly improving the accuracy of blockage judgment. In addition, the combination of intermittent air cannon 500 impact and continuous vibrator 400 vibration can effectively solve the blockage problem. The impact force of the air cannon 500 can quickly break the blockage, while the continuous vibration of the vibrator 400 can prevent the blockage from forming again, ensuring smooth discharge.

[0056] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A coal chute blocking detection device, characterized in that, The application relates to a pressure detection device (200), an ultrasonic sensor (300), a vibrator (400) and an air cannon (500), wherein, the pressure detection device (200) and the ultrasonic sensor (300) are arranged above a bending part (101) of a chute (100), wherein the pressure detection device (200) and the ultrasonic sensor (300) are oppositely arranged on the chute (100) respectively, and the pressure detection device (200) is arranged above the chute (100), and the ultrasonic sensor (300) is arranged below the chute (100); the vibrator (400) and the air cannon (500) are arranged on the chute (100) below the bending part (101) respectively; the pressure detection device (200), the ultrasonic sensor (300), the vibrator (400) and the air cannon (500) are electrically connected with a controller respectively. The pressure detection device (200) comprises a mounting shell (210), a fixed plate (220), a pressure sensor (230) and an elastic sheet (240), wherein, 2. The coal chute blocking detection device according to claim 1, characterized in that, an installation groove (102) is formed above the bending part (101) of the chute (100), and the mounting shell (210) is mounted on the installation groove (102); the fixed plate (220) is mounted in the mounting shell (210); the pressure sensor (230) is arranged on one side of the fixed plate (220) close to the installation groove (102); the elastic sheet (240) is arranged in the mounting shell (210) and embedded in the installation groove (102); the sensing end of the pressure sensor (230) is close to the deformation end of the elastic sheet (240). The ultrasonic sensor (300) is detachably arranged on the chute (100) through a bandage (301).

3. The coal chute blocking detection device according to claim 1, characterized in that, The generating end of the air cannon (500) faces the bending part (101).

4. The coal chute blocking detection device according to claim 1, characterized in that, The air cannon (500) comprises a gas storage tank, an electromagnetic valve, a nozzle and a connecting pipeline, wherein:

5. The coal chute blocking detection device according to claim 1, characterized in that, the gas storage tank is connected with the electromagnetic valve through the connecting pipeline; the electromagnetic valve is connected with the nozzle through the connecting pipeline; the nozzle faces the bending part (101) of the chute (100) and is used for spraying compressed air to a blocked area. The vibrator (400) comprises a motor, an eccentric block and a fixed support, wherein, 6. The coal chute blocking detection device according to claim 1, characterized in that, the motor is fixed on the fixed support through bolts; the eccentric block is mounted on the output shaft of the motor; the fixed support is fixed on the outer wall of the chute (100) through welding or bolt connection. A detachable wear-resistant lining plate is arranged on the inner wall of the bending part (101) of the chute (100), and the wear-resistant lining plate is fixed on the inner wall of the chute (100) through bolts or clamping grooves.

7. The coal chute blocking detection device according to claim 1, characterized in that, A waterproof coating is coated on the surface of the probe of the ultrasonic sensor (300) to reduce the influence of coal dust and water vapor on detection accuracy.

8. The coal chute blocking detection device according to claim 1, characterized in that, ​

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