Blockage detection device for material feeding pipe in mine and material feeding system in mine

Abstract

This disclosure relates to a blockage detection device for a mine feed pipe and a mine feed system. The device redesigns the feed hopper by incorporating a chamber connected to the feed pipe. During normal feeding, material enters the feed pipe through the conveying channel, and air from the chamber enters the feed pipe, reducing the air pressure within the chamber. However, when the feed pipe becomes blocked, the air cannot circulate, and as material enters the feed pipe, air is forced into the chamber, increasing the air pressure within it. A first detection element is installed within the chamber to monitor the air pressure in real time. When the first detection element detects that the air pressure in the chamber reaches a preset value, a control element sends a signal to stop feeding, allowing personnel to clear the feed pipe. Using this blockage detection device, the air pressure within the chamber can be monitored in real time to determine if the feed pipe is blocked, preventing the feed pipe from detaching and ensuring the safety of personnel.

Description

Technical Field

[0001] This disclosure relates to the field of mine material feeding technology, and in particular to a blockage detection device for a mine material feeding pipe and a mine material feeding system. Background Technology

[0002] Traditionally, concrete pouring is widely used when constructing mine shafts. Concrete is usually precast on the ground, then lowered to the working platform using a bucket, and then poured using formwork. This method is inefficient and seriously affects the construction speed.

[0003] Therefore, the current widespread use of concrete slurry conveying via feed pipes has greatly improved concrete material conveying efficiency and shortened mine construction cycles. However, due to the generally deep locations of vertical shafts, the long length and heavy weight of the feed pipes, the fixing devices can typically only withstand the initial impact of the material being conveyed, the downward friction during operation, and the weight of the steel pipe itself. If the feed pipe becomes blocked, the weight of the pipe itself, the continuously increasing weight of the blocked concrete, and the impact of failure to stop conveying in time can easily cause the feed pipe fixing device to succumb to the weight, resulting in partial or complete detachment of the feed pipe. If the feed pipe detaches, it can easily injure construction workers inside the mine, posing a significant safety hazard.

[0004] Therefore, it is especially important for technicians to know whether the feed pipe is blocked and to take timely countermeasures. Summary of the Invention

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a blockage detection device for a mine feed pipe and a mine feed system.

[0006] In a first aspect, this disclosure provides a blockage detection device for a feed pipe in a mine. The blockage detection device includes a feed hopper, a first detection element, and a control element. The feed hopper has a conveying channel, and the outlet of the conveying channel is connected to the feed pipe in the mine to guide material input from the inlet of the conveying channel into the feed pipe. The feed hopper also has a chamber and an air inlet connected to the chamber, and the chamber is connected to the feed pipe through the air inlet. The first detection element is disposed in the chamber and configured to detect the air pressure entering the chamber from the feed pipe. The control element is configured to issue a feed pipe blockage signal when the detection result of the first detection element exceeds a preset value.

[0007] In one embodiment of this disclosure, the chamber surrounds the material conveying channel.

[0008] In one embodiment of this disclosure, the air inlet surrounds the material conveying channel.

[0009] In one embodiment of this disclosure, the hopper includes an outer annular shell and an inner annular shell that intermittently surrounds the outer annular shell. The inner annular shell encloses the material conveying channel. The upper ends of the outer annular shell and the inner annular shell are closed to form the chamber. The lower ends of the outer annular shell and the inner annular shell form the air inlet.

[0010] In one embodiment of this disclosure, the hopper includes an inverted frustum and a cylindrical tube continuously disposed with the small-diameter port of the inverted frustum, and the hopper is connected to the discharge pipe through the cylindrical tube.

[0011] In one embodiment of this disclosure, a plurality of the first detection elements are arranged sequentially and at intervals around the material conveying channel within the chamber.

[0012] In one embodiment of this disclosure, the chamber is divided into multiple regions by a partition along the circumference of the material conveying channel, and the first detection element is disposed in each region.

[0013] In one embodiment of this disclosure, the blockage detection device further includes a blockage location detection element configured to detect the blockage location of the feed pipe.

[0014] In one embodiment of this disclosure, the blockage location detection element includes a first distance detection element and a second distance detection element, wherein the first distance detection element is configured to detect the distance from the feed inlet of the hopper to the upper end face of the blockage section inside the feed pipe; the second distance detection element is configured to detect the distance from the lower end of the feed pipe to the lower end face of the blockage section inside the feed pipe; the control element is further configured to determine the blockage location of the feed pipe based on the detection results of the first distance detection element and the second distance detection element.

[0015] Secondly, this disclosure also provides a mine material feeding system, which includes a material feeding pipe installed in the mine and a blockage detection device as described in any previous embodiment.

[0016] One beneficial effect of the blockage detection device for the feed pipe in the mine disclosed herein is that, through the redesign of the feed hopper, a chamber is set on the feed hopper and connected to the feed pipe. During normal feeding, the material enters the feed pipe through the conveying channel. According to Bernoulli's principle, in a fluid system, the faster the flow velocity, the lower the pressure generated by the fluid. Therefore, when the material enters the feed pipe, the air in the chamber enters the feed pipe from the chamber, reducing the air volume and thus the air pressure in the chamber. However, when the feed pipe is blocked, because the air in the feed pipe cannot circulate, as the material enters the feed pipe, the air in the feed pipe is forced into the chamber, increasing the air pressure in the chamber. A first detection element is installed in the chamber to detect the air pressure in the chamber in real time. When the first detection element detects that the air pressure in the chamber reaches a preset value, the control element sends a signal, thereby stopping the feeding, and the construction personnel clean the feed pipe.

[0017] Obviously, the blockage detection device disclosed herein can realize real-time detection and feedback of blockage in the feed pipe, avoiding personnel casualties caused by the feed pipe falling off due to failure to stop material conveying in time, thus ensuring the safety of construction personnel in the mine.

[0018] It should be noted that since the mine material feeding system disclosed herein includes the aforementioned blockage detection device, the system also possesses all the technical effects of the blockage detection device, which will not be elaborated upon here. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0020] Figure 1 This is a schematic diagram of the structure of a blockage detection device provided in one embodiment of the present disclosure;

[0021] Figure 2 This is a schematic diagram of the airflow direction inside the chamber during normal material feeding, provided in one embodiment of this disclosure;

[0022] Figure 3 This is a schematic diagram of the airflow direction in the chamber when the feed pipe is blocked, provided in one embodiment of this disclosure;

[0023] Figure 4 This is a schematic diagram of the layout of the first detection remote device and the partition in the cavity provided in one embodiment of the present disclosure;

[0024] Figure 5 This is a schematic diagram of the structure of a mine material feeding system provided in one embodiment of the present disclosure.

[0025] Figures 1-5 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0026] 1-Feeding hopper; 11-Feeding inlet; 12-Feeding channel; 13-Discharge outlet; 14-Cavity; 15-Air inlet; 16-Baffle; 2-First detection element; 3-Blocking position detection element; 31-First distance detection element; 32-Second distance detection element; 4-Feeding pipe. Detailed Implementation

[0027] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0032] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0033] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0034] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0035] To enable timely detection of blockages in the feed pipe and to provide blockage location parameters through measurement, this disclosure provides a blockage detection device for feed pipes in mines. For ease of understanding, please refer to the following... Figures 1-5 The specific structure and working principle of the blockage detection device disclosed herein will be described in detail with reference to the embodiments.

[0036] See Figure 1 In one embodiment, the blockage detection device of this disclosure includes a hopper 1, a first detection element 2, and a control element.

[0037] The hopper 1 has a conveying channel 12, and the outlet 13 of the conveying channel 12 is connected to the discharge pipe 4 in the mine to guide the material input from the inlet 11 of the conveying channel 12 into the discharge pipe 4. The hopper 1 also has a chamber 14 and an air inlet 15 connected to the chamber 14. The chamber 14 is connected to the discharge pipe 4 through the air inlet 15. Specifically, the conveying channel 12 and the chamber 14 are connected to the discharge pipe 4 through the outlet 13 and the air inlet 15, respectively.

[0038] See Figure 2 and Figure 3 When material enters the feed pipe 4 through the discharge port 13, it drives the air in the conveying channel 12 to move into the feed pipe 4. According to Bernoulli's principle, in a fluid system, the faster the flow velocity, the lower the pressure generated by the fluid. Since the speed at which the material drives the air at the discharge port 13 is faster than the speed at which the air moves in the chamber 14, the air pressure at the discharge port 13 is lower. The air in the chamber 14 moves outward through the air inlet 15, which reduces the air pressure in the chamber 14. When the feed pipe 4 is blocked, the air in the feed pipe 4 cannot be discharged from the lower end of the feed pipe 4. As material enters, the air pressure in the feed pipe 4 is higher, so the air in the feed pipe 4 moves from the blocked section to the upper end of the feed pipe 4. Further air enters the chamber 14 through the air inlet 15, which increases the air pressure in the chamber 14.

[0039] In addition, both the hopper 1 and the discharge pipe 4 are made of the same material, steel, to ensure the stability of the overall structure during discharge. Because the volume of concrete required for mine construction is very large, the specific gravity of ordinary concrete reaches 2400 kg / m³. 3 The material feeding process has a large impact on the feeding hopper 1 and the feeding pipe 4. The steel has high strength and light weight, which reduces the impact of its own weight on the structural stability and ensures the overall strength of the structure.

[0040] See Figure 4 The first detection element 2 is disposed within the chamber 14 and configured to detect the air pressure entering the chamber 14 from the feed pipe 4. Specifically, the first detection element 2 is a pressure sensor used to detect the air pressure within the chamber 14. Since the air pressure within the chamber 14 will decrease and increase during normal feeding and when the feed pipe 4 is blocked, the first detection element 2 converts the changes in air pressure within the chamber 14 into an electrical signal for the control element to recognize.

[0041] The control element is configured to issue a blockage signal for the feed pipe 4 when the detection result of the first detection element 2 exceeds a preset value. Specifically, the control element includes a control module made of a PLC chip or the like, and a wired or wireless communication module mounted on the control element. It can receive electrical signals from the first detection element 2 and can also send signals to external devices. The blockage signal for the feed pipe 4 is an electrical signal sent to the material conveying mechanism on the ground, causing the material to stop conveying. In another embodiment, the blockage signal for the feed pipe 4 can be an audible signal, emitting a warning sound to remind construction personnel that the feed pipe 4 is blocked, allowing them to manually shut down the material conveying mechanism and stop the material conveying. Alternatively, both electrical and audible signals can be used to further improve the accuracy of the blockage warning.

[0042] In detail, the preset value of the detection result of the first detection element is determined by those skilled in the art during on-site construction based on the local atmospheric pressure, the depth of the mine shaft, the type of concrete, and the diameter of the discharge pipe. No preset value is limited here.

[0043] The specific working process of the above-mentioned blockage detection device is as follows:

[0044] The first detection element 2 is activated. At this time, the detection result of the first detection element 2 on the air pressure in the chamber 14 is atmospheric pressure, indicating that no material is being fed at this time. The material conveying mechanism is activated to start feeding material into the hopper 1. When the material enters the feeding pipe 4 through the discharge port 13, it drives the air in the conveying channel 12 to move into the feeding pipe 4. The air pressure at the discharge port 13 is relatively small. The air in the chamber 14 moves outward through the air inlet 15, which reduces the air pressure in the chamber 14. At this time, the detection result of the first detection element 2 on the air pressure in the chamber 14 is a small value lower than atmospheric pressure, indicating that the feeding is normal at this time.

[0045] When the feed pipe 4 becomes blocked, the material continues to accumulate in a section of the feed pipe 4. The air in the feed pipe 4 cannot be discharged from the lower end of the feed pipe 4. As the material continues to enter, the air pressure in the feed pipe 4 becomes relatively high. Therefore, the air in the feed pipe 4 moves from the blocked section to the upper end of the feed pipe 4 and enters the chamber 14 through the air inlet 15, which increases the air pressure in the chamber 14. The first detection element 2 detects that the air pressure in the chamber 14 first reaches atmospheric pressure and then reaches the preset value, indicating that the feed pipe 4 has become blocked. The control element sends a blockage signal for the feed pipe 4 and stops feeding.

[0046] Obviously, the blockage detection device disclosed herein can detect the air pressure in the chamber 14 in real time and determine whether the feed pipe 4 is blocked, thus avoiding safety accidents caused by the feed pipe 4 falling off and injuring workers due to failure to stop the material conveying in time, and ensuring the safety of construction personnel in the mine.

[0047] In one embodiment, the chamber 14 of this disclosure surrounds the material conveying channel 12.

[0048] Specifically, the chamber 14 is arranged around the conveying channel 12, with the outlet 13 of the conveying channel 12, located at the center, aligned with the upper opening of the discharge pipe 4. This allows the material to smoothly enter the discharge pipe 4 from the conveying channel 12 through the outlet 13, avoiding excessive overflow. When the material enters the discharge pipe 4 through the outlet 13, it causes air movement in a 360° direction around the material. The chamber 14, surrounding the conveying channel 12, can maximize the utilization of air changes, and the air pressure within the entire chamber 14 will change due to the material discharge.

[0049] In one embodiment, the air inlet 15 of this disclosure surrounds the material conveying channel 12.

[0050] Specifically, the air inlet 15 is arranged around the outlet 13 of the conveying channel 12. The material and the air in the chamber 14 mainly come into contact at the air inlet 15 and the outlet 13. The change in air pressure also first occurs at the air inlet 15 and the outlet 13. The air inlet 15 surrounding the outlet 13 of the conveying channel 12 can make the most of the changes in air pressure.

[0051] In one embodiment, the hopper 1 of this disclosure includes an outer annular shell and an inner annular shell that intermittently surrounds the outer annular shell. The inner annular shell encloses a material conveying channel 12. The upper ends of the outer annular shell and the inner annular shell are closed to form a chamber 14. The lower ends of the outer annular shell and the inner annular shell form an air inlet 15.

[0052] Specifically, the hopper 1 adopts a double-layer structure. One layer is a conveying channel 12 formed by an inner annular shell, used to convey materials to the discharge pipe 4. The other layer is a chamber 14 formed by an outer annular shell and an inner annular shell, used to house the first detection element 2. The change in air pressure within the chamber 14 determines whether the discharge pipe 4 is blocked. The upper ends of the outer and inner annular shells are closed, thus sealing the upper end of the chamber 14. The change in air pressure within the chamber 14 comes from the change in air within the discharge pipe 4 and is not affected by the external environment. If the upper end of the chamber 14 is not sealed, the discharge pipe 4 is connected to the atmosphere. Even if there is a temporary pressure reduction due to material discharge, the pressure will be quickly balanced by the outside air, keeping the air pressure within the chamber 14 relatively stable at atmospheric pressure. Therefore, it is impossible to determine whether the discharge pipe 4 is blocked based on the air pressure detection result of the first detection element 2.

[0053] In one embodiment, the hopper 1 of this disclosure includes an inverted frustum cylinder and a cylindrical cylinder continuously disposed with the small-diameter port of the inverted frustum cylinder, and the hopper 1 is connected to the discharge pipe 4 through the cylindrical cylinder.

[0054] Specifically, the large-diameter port of the inverted frustum-shaped cylinder is the inlet 11, which facilitates the material conveying mechanism to transport materials into the hopper 1. The centerline of the small-diameter port is aligned with the centerline of the upper opening of the discharge pipe 4, and their diameters are consistent, or the diameter of the outlet 13 is slightly smaller than the diameter of the upper opening of the discharge pipe 4, so that the material can smoothly enter the discharge pipe 4 from the conveying channel 12 and avoid excessive overflow. In addition, the overall diameter of the conveying channel 12 and the chamber 14 is larger than the diameter of the discharge pipe 4. Through the transition of the cylindrical cylinder, it narrows to the same diameter as the discharge pipe 4. The cylindrical section is connected to the upper opening of the discharge pipe 4 by welding.

[0055] In one embodiment, a plurality of first detection elements 2 are arranged sequentially and at intervals around the material conveying channel 12 within the chamber 14 of this disclosure.

[0056] Specifically, during the feeding process, air pressure changes occur throughout the entire chamber 14. Multiple first detection elements 2 are arranged around the feeding channel 12 to prevent the blockage detection device from still working even if one of the first detection elements 2 fails to function, thus improving the stability of the device.

[0057] In one embodiment, along the circumference of the conveying channel 12, the chamber 14 of this disclosure is divided into multiple regions by a partition 16, and a first detection element 2 is provided in each region.

[0058] Specifically, chamber 14 is divided into multiple regions along the circumference of the conveying channel 12 by partitions 16. This arrangement allows for independent changes in air pressure within each region during normal material feeding or when blockage occurs in the feeding pipe 4. Each region is equipped with a first detection element 2, enabling independent detection of blockage in the feeding pipe 4. Even if the first detection element 2 in one region malfunctions or chamber 14 in another region ruptures, affecting air pressure changes, as long as one region's chamber 14 and first detection element 2 remain intact, the system can still detect blockage in the feeding pipe 4 and issue a blockage signal. Furthermore, dividing chamber 14 into multiple regions reduces the space in each region, increasing air pressure variations and making the first detection element 2 more sensitive, thus improving the accuracy of the feeding pipe 4 blockage warning.

[0059] See Figure 5 In one embodiment, the blockage detection device of this disclosure further includes a blockage position detection element 3, which is configured to detect the blockage position of the feed pipe 4.

[0060] Specifically, the blockage location detection element 3 is an infrared rangefinder, which is used to determine the blockage location after the feed pipe 4 becomes blocked, and then manual cleaning or pipe replacement measures are taken for the feed pipe 4.

[0061] In one embodiment, the blockage location detection element 3 of this disclosure includes a first distance detection element 31 and a second distance detection element 32, wherein the first distance detection element 31 is configured to detect the distance from the feed inlet 11 of the hopper 1 to the upper end face of the blockage section inside the feed pipe 4; the second distance detection element 32 is configured to detect the distance from the lower pipe opening of the feed pipe 4 to the lower end face of the blockage section inside the feed pipe 4; the control element is further configured to determine the blockage location of the feed pipe 4 based on the detection results of the first distance detection element 31 and the second distance detection element 32.

[0062] Specifically, both the first distance detection element 31 and the second distance detection element 32 are infrared rangefinders. During normal material feeding, the first distance detection element 31 and the second distance detection element 32 are not working and are far away from the feeding pipe 4. When the feeding pipe 4 becomes blocked, the robotic arm transports the first distance detection element 31 to the center line of the upper opening of the feeding pipe 4 to start the detection work. After the concrete slurry at the lower opening of the feeding pipe 4 has flowed out, the robotic arm transports the second distance detection element 32 to the center line of the lower opening of the feeding pipe 4 to start the detection work.

[0063] The first distance detection element 31 detects the distance from the inlet 11 of the hopper 1 to the upper end face of the blockage section inside the discharge pipe 4. The second distance detection element 32 detects the distance from the lower opening of the discharge pipe 4 to the lower end face of the blockage section inside the discharge pipe 4. Since the length of the discharge pipe 4 is a known fixed length, and the number of discharge pipes 4 used is also recorded, i.e., the total length of the discharge pipe is known, the control element can obtain the position and length of the blockage section in the discharge pipe 4 from the distance from the inlet 11 of the hopper 1 to the upper end face of the blockage section inside the discharge pipe 4, the distance from the lower opening of the discharge pipe 4 to the lower end face of the blockage section inside the discharge pipe 4, and the total length of the discharge pipe 4. The position and length of the blockage section in the discharge pipe 4 are fed back to the construction personnel, who can then manually determine whether to clean or replace the pipe.

[0064] In addition, this disclosure also provides a mine material feeding system, which includes a material feeding pipe 4 installed in the mine and a blockage detection device. The specific connection relationship and working principle of the material feeding pipe 4 and the blockage detection device have been explained in detail above, and will not be repeated here.

[0065] Furthermore, to facilitate better understanding, the material cutting process of this disclosure will be explained in detail below in conjunction with actual material cutting application scenarios.

[0066] 1. Material feeding pipes 4 are used to connect the working face of the mine to the ground in sequence. The material feeding pipes 4 are connected by flanges. Precast concrete is started on the ground.

[0067] 2. Start the mine feeding system, and the first detection element 2 starts working. At this time, the detection result of the first detection element 2 on the air pressure in the chamber 14 is atmospheric pressure;

[0068] 3. The material conveying mechanism starts to feed material into the hopper 1. When the material enters the feeding pipe 4 through the discharge port 13, it drives the air in the conveying channel 12 to move into the feeding pipe 4. The air pressure at the discharge port 13 is relatively small. The air in the chamber 14 moves outward through the air inlet 15, which reduces the air pressure in the chamber 14. At this time, the detection result of the first detection element 2 on the air pressure in the chamber 14 is a smaller value that is lower than the atmospheric pressure.

[0069] 4. When the feed pipe 4 is blocked, the material continues to accumulate in a section of the feed pipe 4. The air in the feed pipe 4 cannot be discharged from the lower pipe opening of the feed pipe 4. As the material continues to enter, the air pressure in the feed pipe 4 is relatively high. Therefore, the air in the feed pipe 4 moves from the blocked section to the upper pipe opening of the feed pipe 4 and enters the chamber 14 through the air inlet 15, which increases the air pressure in the chamber 14. The detection result of the first detection element 2 on the air pressure in the chamber 14 first reaches the atmospheric pressure and then reaches the preset value.

[0070] 5. The control element sends a blockage signal to the feed pipe 4, and the material conveying mechanism stops feeding.

[0071] 6. The control element continues to control the first distance detection element 31 to be transported by the robotic arm to the center line of the upper pipe opening of the feeding pipe 4, and detects the distance from the feed inlet 11 of the feeding hopper 1 to the upper end face of the blockage section inside the feeding pipe 4. The control element continues to control the second distance detection element 32 to be transported by the robotic arm to the center line of the lower pipe opening of the feeding pipe 4, and detects the distance from the lower pipe opening of the feeding pipe 4 to the lower end face of the blockage section inside the feeding pipe 4.

[0072] 7. The control element determines the position and length of the blockage section of the discharge pipe 4 based on the length and quantity of the discharge pipe 4, the distance from the inlet 11 of the discharge hopper 1 to the upper end face of the blockage section inside the discharge pipe 4, and the distance from the lower pipe opening of the discharge pipe 4 to the lower end face of the blockage section inside the discharge pipe 4, and feeds this information back to the construction personnel.

[0073] 8. Construction personnel shall take measures such as cleaning or replacing the pipes according to the actual blockage situation;

[0074] 9. After cleaning or replacing the pipe, the detection results of the first distance detection element 31 and the second distance detection element 32 are the total length of the feeding pipe 4. The control element sends a signal and the material conveying mechanism continues to feed.

[0075] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A device for detecting blockages in a mine feed pipe, characterized in that, The blockage detection device includes: The hopper (1) has a conveying channel (12), and the outlet (13) of the conveying channel (12) is connected to the discharge pipe (4) in the mine to guide the material input by the inlet (11) of the conveying channel (12) into the discharge pipe (4). The hopper (1) also has a chamber (14) and an air inlet (15) connected to the chamber (14). The chamber (14) is connected to the discharge pipe (4) through the air inlet (15). A first detection element (2) is disposed in the chamber (14) and configured to detect the air pressure in the chamber (14); A control element configured to issue a blockage signal in the feed pipe (4) when the detection result of the first detection element (2) exceeds a preset value; The chamber (14) surrounds the material conveying channel (12); The air inlet (15) surrounds the material conveying channel (12); The hopper (1) includes an outer annular shell and an inner annular shell that intermittently surrounds the outer annular shell, wherein the upper ends of the outer annular shell and the inner annular shell are closed, thereby closing the upper end of the chamber (14).

2. The blockage detection device according to claim 1, characterized in that, The inner annular shell surrounds the material conveying channel (12), the upper ends of the outer annular shell and the inner annular shell are closed to form the chamber (14), and the lower ends of the outer annular shell and the inner annular shell form the air inlet (15).

3. The blockage detection device according to claim 1, characterized in that, The feeding hopper (1) includes an inverted frustum and a cylindrical tube continuously arranged with the small diameter port of the inverted frustum. The feeding hopper (1) is connected to the feeding pipe (4) through the cylindrical tube.

4. The blockage detection device according to claim 1, characterized in that, The chamber (14) is provided with a plurality of the first detection elements (2) arranged at intervals around the material conveying channel (12).

5. The blockage detection device according to claim 1, characterized in that, Along the circumference of the material conveying channel (12), the chamber (14) is divided into multiple regions by a partition (16), and the first detection element (2) is provided in each region.

6. The blockage detection device according to any one of claims 1 to 5, characterized in that, The blockage detection device further includes a blockage location detection element (3), which is configured to detect the blockage location of the feed pipe (4).

7. The blockage detection device according to claim 6, characterized in that, The blockage location detection element (3) includes: A first distance detection element (31) is configured to detect the distance from the feed inlet (11) of the hopper (1) to the upper end face of the blockage section inside the feed pipe (4); The second distance detection element (32) is configured to detect the distance from the lower opening of the feed pipe (4) to the lower end face of the blockage section inside the feed pipe (4); The control element is also configured to determine the blockage position of the feed pipe (4) based on the detection results of the first distance detection element (31) and the second distance detection element (32).

8. A mine material feeding system, characterized in that, The mine feeding system includes a feeding pipe (4) installed in the mine, and a blockage detection device as described in any one of claims 1 to 7.

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