Anti-freezing and blocking material mechanism, hopper and belt conveyor

Abstract

The application relates to a kind of anti-freezing material sticking mechanism, hopper and belt conveyor, including material blocking plate unit and gas supply unit, material blocking plate unit includes pressure shell, load receiving plate and multiple partitions, load receiving plate is connected with pressure shell, and forms containing chamber between load receiving plate and pressure shell, load receiving plate is provided with several jet holes that pass through load receiving plate relative to two surfaces;Multiple partitions are arranged between load receiving plate and pressure shell, and containing chamber is divided into multiple air chambers independent of each other, each air chamber is communicated with at least one jet hole;Gas supply unit is used to provide gas to all air chambers, and the gas in air chamber flows out through jet hole, to form the airflow flowing from top to bottom on the outer surface of load receiving plate.The material blocking mechanism of the application provides gas to air chamber by using gas source, and the gas flows out through jet hole, to blow the material falling on load receiving plate, to solve the freezing blockage problem generated when conveying wet and sticky material in low temperature environment from the source.

Description

Technical Field

[0001] This invention relates to the field of hopper technology for coal mine transportation equipment, specifically to an antifreeze and anti-sticking material blocking mechanism, a hopper, and a belt conveyor. Background Technology

[0002] Belt conveyors are indispensable continuous conveying equipment in industries such as mining and ports, and their operational stability directly affects production efficiency and safety. The hopper, as a crucial component, is used to transfer materials from the belt conveyor to the discharge point. It is equipped with adjustable baffles inside, which prevent wear on the inner wall of the hopper and guide the direction of material discharge. However, when conveying wet and sticky materials in low-temperature environments, the surface of the baffles is prone to freezing and icing, ultimately leading to hopper blockage. In actual production, due to the small internal space of the hopper and poor material flowability, freezing and clogging accidents involving wet and sticky materials occur frequently, severely restricting material conveying and production efficiency.

[0003] Currently, the industry largely relies on manual cleaning to address hopper blockages and material buildup. This method is not only difficult and time-consuming, but also poses significant safety hazards and increases the costs of spare parts, materials, and labor. To prevent freeze-sticking from the source, some solutions use ceramic materials. However, while ceramics are hydrophobic, they are not impact-resistant, resulting in a short lifespan. Other solutions increase the distance between the baffle plate and the roller, altering the angle at which the material impacts the baffle plate to reduce blockage. However, these solutions do not fundamentally solve the problem of freeze-sticking and blockage of wet, sticky materials in low-temperature environments. Summary of the Invention

[0004] In view of this, the present invention provides a material blocking mechanism that can solve the problem of freezing and sticking blockage caused by conveying wet and sticky materials in a low-temperature environment in the hopper of a belt conveyor from the source.

[0005] To achieve the aforementioned objective, a first aspect of the present invention provides a material blocking mechanism for a belt conveyor hopper, the material blocking mechanism comprising a material blocking plate unit and an air supply unit, the material blocking plate unit comprising:

[0006] A pressure-bearing shell, wherein the pressure-bearing shell has an internal cavity;

[0007] The load-bearing plate is connected to the pressure-bearing shell and forms a receiving cavity between the load-bearing plate and the pressure-bearing shell. The load-bearing plate has a plurality of jet holes penetrating two opposite surfaces of the load-bearing plate.

[0008] Multiple partitions are disposed between the load-bearing plate and the pressure-bearing shell to divide the receiving chamber into multiple independent air chambers, each of which is in communication with at least one jet hole;

[0009] The gas supply unit is used to supply gas to all the gas chambers, and the gas in the gas chambers flows out through the jet holes to form a downward airflow on the outer surface of the load plate.

[0010] In the aforementioned material blocking mechanism for a belt conveyor hopper, optionally, the jet hole extends obliquely from the inner surface of the load-bearing plate to the outer surface of the load-bearing plate from top to bottom.

[0011] In the aforementioned belt conveyor hopper baffle mechanism, optionally, the air supply unit includes an air source and a gas pipeline connected to the air source, the gas pipeline is also connected to at least one air chamber, and another air chamber is connected to the first air chamber through a through hole opened on the partition.

[0012] In the aforementioned belt conveyor hopper retaining mechanism, the air source may optionally be a blower, an air compressor, or a gas storage tank.

[0013] In the aforementioned material blocking mechanism for a belt conveyor hopper, optionally, an air inlet is provided in the portion of the air chamber corresponding to the position of the pressure shell, and the gas pipeline is connected to the portion of the air chamber through the air inlet.

[0014] In the aforementioned belt conveyor hopper retaining mechanism, the gas supply unit may optionally include a pressure sensor disposed on the gas pipeline and a safety valve disposed on the gas pipeline.

[0015] In the aforementioned belt conveyor hopper baffle mechanism, optionally, the gas pipeline includes a main pipeline connected to the gas source, a gas distribution groove disposed on the pressure bearing shell, and a branch pipeline connecting the main pipeline and the gas distribution groove. The gas distribution groove is connected to the partial gas chamber, and the branch pipeline is a flexible hose.

[0016] In the aforementioned material blocking mechanism for a belt conveyor hopper, optionally, the air chamber and the jet hole are arranged in a one-to-one correspondence, and the jet hole and the air chamber are respectively distributed in an array.

[0017] In the aforementioned material blocking mechanism for a belt conveyor hopper, optionally, through holes are provided on the partition between two adjacent air chambers in all air chambers in the same column, so that all air chambers in the same column are connected.

[0018] The gas pipeline includes a main pipeline connected to the gas source, a gas distribution groove disposed on the pressure-bearing shell, and a branch pipeline connecting the main pipeline and the gas distribution groove.

[0019] At least one air chamber in each column is connected to a gas distribution groove; the extending direction of the gas distribution groove intersects the extending direction of the column;

[0020] Multiple gas distribution slots are provided, and the multiple gas distribution slots are spaced apart along the extension direction of the column. Each gas distribution slot is connected to the main pipeline via a branch pipeline.

[0021] In the aforementioned material blocking mechanism for a belt conveyor hopper, optionally, the jet holes and air chambers are irregularly distributed, and the jet holes and air chambers are distributed in a manner that is dense in the center of the load-bearing plate and sparse at the edges.

[0022] In the aforementioned material-blocking mechanism for a belt conveyor hopper, optionally, the pressure-bearing shell and the load-bearing plate are detachably connected, and the load-bearing plate is replaceable;

[0023] A sealing ring is provided between the pressure-bearing shell and the load-bearing plate.

[0024] A second aspect of the present invention provides a belt conveyor hopper, comprising a hopper body, the hopper further comprising a baffle mechanism for the belt conveyor hopper as described in any one of the first aspects, wherein the baffle plate unit is rotatably disposed within the hopper body.

[0025] A second aspect of the present invention provides a belt conveyor comprising a belt conveyor hopper as described in the preceding second aspect.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0027] The material blocking mechanism of the present invention uses an air source to supply gas to the air chamber, and the gas flows out through the jet hole to form an airflow flowing from top to bottom on the outer surface of the receiving plate, thereby blowing away the material that falls onto the receiving plate, thus solving the problem of freezing and sticking blockage caused by conveying wet and sticky materials in the low temperature environment of the belt conveyor hopper from the source.

[0028] Furthermore, the jet holes in the material blocking mechanism of the present invention are inclined downwards, which can not only prevent fine particles and dust from entering the jet holes and thus prevent blockage of the airflow channel, but also form a dense pressurized airflow jet, improve the wear resistance of the load plate and further help to promote the detachment of wet and sticky materials from the surface of the load plate, thereby playing an anti-freezing and anti-sticking role. Attached Figure Description

[0029] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0030] Figure 1 This is a schematic diagram of the structure of an adjustable baffle in the prior art;

[0031] Figure 2 This is an isometric view of the belt conveyor hopper according to an embodiment of the present invention;

[0032] Figure 3 for Figure 2 A rear-view axonometric drawing of the funnel;

[0033] Figure 4 This is an isometric view of the material-stopping mechanism according to an embodiment of the present invention;

[0034] Figure 5 for Figure 4 Rear-view axonometric drawing of the material-stopping mechanism;

[0035] Figure 6 for Figure 4 Axonometric view of the load-bearing plate of the material-stopping mechanism;

[0036] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0037] Figure 8 for Figure 6 Rear-view axonometric view of the load-bearing plate;

[0038] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0039] Figure 10 Figure 4 Axonometric view of the pressure-bearing shell of the material-stopping mechanism;

[0040] Figure 11 for Figure 10 Enlarged view of point C in the middle;

[0041] Figure 12 for Figure 10 Enlarged schematic diagram of the corner of the pressure-bearing shell;

[0042] Figure 13 for Figure 10 Rear-view axonometric view of the pressure shell;

[0043] Figure 14 for Figure 4 A schematic diagram of the air supply unit of the material blocking mechanism;

[0044] Figure 15 This is a streamline diagram of the gas flow inside each gas chamber and the gas outflow from the jet hole of the material blocking mechanism according to an embodiment of the present invention;

[0045] Figure 16 This is a diagram showing the total gas pressure inside each chamber and jet hole of the material-blocking mechanism according to an embodiment of the present invention.

[0046] In the picture:

[0047] 1. Funnel body; 2. Load-bearing plate; 2a. Outer surface of the load-bearing plate; 2b. Inner surface of the load-bearing plate; 201. Load-bearing plate body; 202. Jet hole; 203. First stud hole; 204. Load-bearing plate extension; 205. Load-bearing plate positioning part; 3. Pressure-bearing shell; 301. Pressure-bearing shell body; 302. Air inlet; 303. Second stud hole; 304. Pressure-bearing extension; 305. Pressure-bearing sealing groove; 306. Pressure-bearing positioning groove; 4. Gas pipeline; 401. Gas distribution groove; 402. Branch pipeline; 403. Main pipeline; 5. Safety valve; 6. Pressure sensor; 7. Gas source; 8. Nut; 9. Stud; 10. Partition plate; 11. Through hole; 12. Gas chamber. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] For any single technical feature described or implied in the embodiments submitted herein, or any single technical feature shown or implied in the various drawings, the present invention still operates in any combination or deletion among these technical features or their equivalents without any technical obstacle, and thus these further embodiments according to the present invention should also be considered within the scope of the description herein.

[0050] In the following description, the terms "up" and "down," etc., refer to the direction. Figure 2 In the figure, the upper direction is "up" and the lower direction is "down". The above definition of direction is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0051] Existing belt conveyor hopper baffles, such as Figure 1 As shown, the baffle plate is rotatably mounted inside the funnel body via a pivot at its upper end to prevent wear on the inner wall of the funnel body and to guide the material discharge direction. The lower part of the baffle plate has an adjustment unit that adjusts the rotation angle of the baffle plate within the funnel body to adjust the distance between the baffle plate and the roller. However, when conveying wet and sticky materials in low-temperature environments, the surface of the baffle plate is prone to freezing and sticking, which can clog the funnel.

[0052] This application addresses the aforementioned problems by proposing a material-blocking mechanism in the hopper of a belt conveyor, see [link to relevant documentation]. Figures 2-3The baffle plate unit in this material-blocking mechanism is rotatably mounted inside the hopper body 1. An adjustment unit is also provided between the baffle plate unit and the hopper body 1. The adjustment unit is used to adjust the rotation angle of the baffle plate unit within the hopper body 1. The adjustment unit can be a commonly used adjustment unit in the prior art, and its specific structure is not limited, as long as it can adjust the rotation of the baffle plate unit. This material-blocking mechanism can be applied to hoppers in coal mine transportation equipment, such as belt conveyor hoppers.

[0053] See also Figure 4 and Figure 5 The material-blocking mechanism includes a baffle plate unit and an air supply unit. The baffle plate unit includes a pressure-bearing shell 3, a load-bearing plate 2, and multiple partitions 10. The pressure-bearing shell 3 has an internal cavity. The load-bearing plate 2 is connected to the pressure-bearing shell 3 and forms a receiving chamber between the load-bearing plate 2 and the pressure-bearing shell 3. Several jet holes 202 are opened on the load-bearing plate 2, penetrating two opposite surfaces of the load-bearing plate 2. Multiple partitions 10 are arranged between the load-bearing plate 2 and the pressure-bearing shell 3, dividing the receiving chamber into multiple independent air chambers 12. Each air chamber is connected to at least one jet hole 202. The air supply unit is used to supply gas to all air chambers. The gas in the air chambers flows out through the jet holes to form a downward airflow on the outer surface 2a of the load-bearing plate, thereby sweeping away the material falling onto the load-bearing plate 2 and minimizing the adhesion of the material to the surface of the load-bearing plate, thus playing a role in preventing freezing and sticking and improving the wear resistance of the load-bearing plate.

[0054] Compared to the method where gas directly enters the containment chamber and then flows out through the jet holes (i.e., without using a partition), this application divides the containment chamber into multiple air chambers, so that the gas first enters the air chamber and then flows out through the jet holes. This results in less pressure loss, more uniform airflow distribution, and a smaller required air supply volume. It also avoids the situation where the air pressure in the middle jet holes is very high, while the gas in the edge jet holes is less.

[0055] See Figure 8 and Figure 9The jet hole 202 extends obliquely from the inner surface 2b of the load-bearing plate to the outer surface 2a of the load-bearing plate from top to bottom, and the air pressure flowing out of the jet hole is greater than atmospheric pressure. The inner surface 2b of the load-bearing plate is the surface facing the pressure shell, and the outer surface 2a of the load-bearing plate is the surface facing away from the pressure shell. The advantages of using the downwardly inclined jet hole include at least the following: (1) It can prevent fine particles and dust from entering the jet hole when conveying materials, thereby preventing blockage of the airflow channel. (2) It can form a dense pressurized airflow bundle. When the conveyed material comes into contact with the load-bearing plate, the horizontal component of the pressurized airflow bundle can form a buffer effect, improving the wear resistance of the load-bearing plate. On the other hand, its downward longitudinal component helps to promote the detachment of wet and sticky materials from the outer surface of the load-bearing plate, thereby playing an anti-freeze-sticking role. (3) The pressurized airflow has a drying effect, which can reduce the moisture remaining on the surface of the load-bearing plate of wet and sticky materials, further reducing the risk of freeze-sticking. (4) If the material has frozen and stuck in the gap between the jet holes on the surface of the load plate, the pressurized air jet can impact the frozen and stuck material in a cone shape to prevent the frozen and stuck area from expanding further; if the frozen and stuck material partially covers the jet holes, the pressurized air jet will gradually form an air cushion layer between the material and the load plate, causing the frozen and stuck material to gradually loosen until it falls off.

[0056] In some embodiments, the jet holes 202 on the receiving plate 2 can be distributed in an array or unevenly. For example, depending on the material drop distribution, the distribution density of jet holes is denser closer to the center and sparser closer to the edge of the plate. The jet holes 202 can be set as equal diameter holes, or they can be designed as variable diameter holes or irregularly shaped holes as needed, and their size can be varied according to actual needs.

[0057] In optional embodiments, the air chambers can be distributed in an array or unevenly. The air chambers can be set one-to-one with the jet holes, or each air chamber can be set with more than one jet hole. The number and arrangement of each air chamber and jet hole can be increased and planned according to actual needs, or jet holes and air chambers can be set only in easily frozen parts.

[0058] Combined Figure 6 and Figure 7 The load-bearing plate 2 includes a load-bearing plate body 201 and a load-bearing plate extension 204 extending outward from the side of the load-bearing plate body 201. The load-bearing plate body 201 protrudes from the load-bearing plate extension 204. A load-bearing plate positioning part 205 is provided on the load-bearing plate extension 204 around the circumference of the load-bearing plate body 201. The load-bearing plate extension 204, the load-bearing plate positioning part 205, and the load-bearing plate body 201 are arranged in a stepped manner. Jet holes 202 are distributed on the load-bearing plate body 201. A plurality of first stud holes 203 are provided on the load-bearing plate extension 204 for assembly with second stud holes on the pressure shell. The load-bearing plate positioning part 205 is used to realize the positioning function.

[0059] See Figure 10 and Figure 12 The pressure-bearing shell 3 includes a pressure-bearing shell body 301 and a pressure-bearing extension 304 formed by extending outward from the side edge of the pressure-bearing shell body 301. A pressure-bearing positioning groove 306 and a pressure-bearing sealing groove 305 are provided between the pressure-bearing shell body 301 and the pressure-bearing extension 304 to cooperate with the load-bearing plate positioning part and the load-bearing plate body. A plurality of second stud holes 303 are provided on the pressure-bearing extension 304.

[0060] When the load-bearing plate is assembled with the pressure-bearing shell, the load-bearing plate positioning part 205 fits into the pressure-bearing positioning groove 306, and the load-bearing plate body 201 fits into the pressure-bearing sealing groove 305. A sealing medium, such as a rubber strip, is placed between the load-bearing plate body 201 and the pressure-bearing sealing groove 305. Then, the stud 9 is passed through the first stud hole 203 and the second stud hole 303, and tightened with the nut 8, thereby compressing the rubber strip and forming the sealing pressure required for pressurized gas, thus achieving a seal. The load-bearing plate 2 can be replaced according to wear conditions.

[0061] See also Figures 10 to 14 The gas supply unit includes a gas source 7 and a gas pipeline 4 connected to the gas source 7. The gas pipeline 4 is also connected to a portion of the gas chambers, and another portion of the gas chambers is connected to the portion of the gas chambers through a through hole 11 opened on the partition plate 10.

[0062] In this example, the gas pipeline 4 includes a main pipeline 403 connected to the gas source 7, a gas distribution channel 401 disposed on the pressure shell 3, and a branch pipeline 402 connecting the main pipeline 403 and the gas distribution channel 401. The gas distribution channel 401 communicates with a portion of the gas chamber, and an air inlet 302 is provided on the pressure shell 3 at the position corresponding to the portion of the gas chamber. The gas distribution channel 401 communicates with the portion of the gas chamber through the air inlet 302.

[0063] In some embodiments, a gas distribution plate with a groove on the outer surface of the pressure shell 3 is fixedly connected to the pressure shell 3, so that a gas distribution groove is formed between the gas distribution plate and the pressure shell 3.

[0064] In an optional embodiment, the gas source 7 can be a blower, an air compressor, or a gas storage tank. When a gas storage tank is used, it is used in conjunction with a pressure regulating valve assembly. The gas source 7 can be installed outside the funnel body. In order to facilitate the adjustment of the baffle plate unit and avoid interference in the gas pipeline during the adjustment of the baffle plate unit, the branch pipeline 402 is a flexible hose, and the branch pipeline 402 passes through the hole in the side wall of the funnel body.

[0065] In this example, the air chambers and jet holes are arranged in a one-to-one correspondence, and both the air chambers and jet holes are distributed in an array, such as... Figures 10 to 11In all the air chambers 12 in the same column, through holes 11 are opened on the partitions 10 between two adjacent air chambers, so that all the air chambers in the same column are connected. At least one air chamber in each column is connected to the air distribution groove 401. The extension direction of the air distribution groove 401 intersects the extension direction of the column, or can be perpendicular. Multiple air distribution grooves 401 can be provided, and multiple air distribution grooves are arranged at intervals along the extension direction of the column. Each air distribution groove is connected to a branch pipe 402 between itself and the main pipe 403.

[0066] For example, in all the air chambers in each longitudinal column, the partition between two longitudinally adjacent air chambers is provided with through holes 11, and the partition between two transversely adjacent air chambers in different longitudinal columns is not provided with through holes. At the same time, all the air chambers in the same transverse column are provided with air inlets corresponding to the positions of the pressure-bearing shell, so that the pressurized gas is evenly distributed in each air chamber and outputs a stable pressure.

[0067] The gas supply unit also includes a safety valve 5 and a pressure sensor 6 respectively installed on the main pipeline 403. The gas source 7 provides a gas with a preset working pressure higher than the ambient pressure (the ambient pressure is usually atmospheric pressure), and the pressure sensor 6 can be used to monitor the operating status of the material blocking mechanism. The safety valve 5 has an overpressure relief protection function.

[0068] Specifically, the monitoring principle of pressure sensor 6 is as follows: if the monitored pressure is lower than the normal working pressure, it indicates that there is a gas leak in the material blocking mechanism and the sealing is not good; if the monitored pressure is close to atmospheric pressure, it indicates that the load plate has been worn through and the load plate should be replaced immediately; if the monitored pressure is greater than the normal working pressure, it indicates that the jet hole is blocked and the load plate has frozen and stuck.

[0069] After the load-bearing plate is replaced, an air pressure test can be performed. If the pressure sensor shows that the working pressure is normal, the replacement is successful; if the pressure is lower than the normal working pressure, there may be a leak.

[0070] The safety valve operates on the following principle: If the jet orifice becomes blocked, the internal pressure of the baffle mechanism will rise. When the pressure reaches the release pressure, the safety valve quickly activates and releases the internal pressure to ensure the structural integrity of the baffle mechanism. Simultaneously, the safety valve also monitors whether freezing and sticking blockages occur inside the funnel: if the safety valve activates, the machine should be stopped for inspection; if the safety valve does not activate, the frequency of inspections can be reduced.

[0071] In optional embodiments, the number of gas sources can be one or more, and the number of gas distribution channels, branch pipelines, and main pipelines can be increased or decreased according to actual needs. Multiple gas sources can be input into the same main pipeline, or each main pipeline can be equipped with one or more gas sources, thereby increasing the gas pressure and enhancing the anti-sticking effect as needed.

[0072] The working process of the material blocking mechanism in this embodiment of the application is as follows:

[0073] The pressurized gas supplied by gas source 7 enters each gas chamber through gas pipeline and finally flows out through each jet hole on the load plate to form an airflow flowing from top to bottom on the outer surface of the load plate. The jet hole extends from the inner surface of the load plate to the outer surface of the load plate from top to bottom.

[0074] The jet orifices are angled downwards to prevent fine particles and dust from entering during material transport, thus avoiding blockage of the airflow channels. Simultaneously, the downward angled arrangement of the jet orifices creates a dense pressurized airflow jet. When the transported material contacts the receiving plate, this pressurized airflow jet acts as a buffer, improving the wear resistance of the receiving plate, while its downward longitudinal component helps to detach wet, sticky material from the outer surface of the receiving plate, thus preventing freeze-sticking. Furthermore, the pressurized airflow has a drying effect, reducing residual moisture after contact with the receiving plate surface, further reducing the risk of freeze-sticking. If material has already frozen and stuck in the gaps between the jet orifices on the receiving plate surface, the pressurized airflow jet can impact the frozen material in a cone-shaped manner, preventing the frozen area from expanding further. If the frozen material partially covers the jet orifices, the pressurized airflow gradually forms an air cushion layer between the material and the receiving plate, causing the frozen material to gradually loosen and eventually fall off, effectively preventing freeze-sticking and improving the wear resistance of the receiving plate.

[0075] The material blocking mechanism of this invention utilizes pressurized airflow to enhance the wear resistance and anti-freeze adhesion of the receiving plate. The jet orifice also has self-cleaning capability, and the matching safety valve and pressure sensor can monitor the operating status of the material blocking mechanism and the freezing and adhesion blockage of the receiving plate in real time. Compared with existing material blocking plates, it can enhance the anti-freeze adhesion performance and wear resistance of the material blocking mechanism without changing the structure and size of the funnel, overcoming the problems of difficult manual cleaning, long downtime, and safety hazards.

[0076] In some embodiments, a simulation experiment was conducted on the material blocking mechanism. In this simulation experiment, the gas pressure at the air inlet on the pressure shell was set to 12000 Pa. This value was referenced to the output air source parameters of the blower in a commonly used air cushion belt conveyor in the coal mine conveying industry. The results are as follows: Figure 15 and Figure 16 As shown. From Figure 15 and Figure 16It is clearly visible that pressurized gas flows into some of the air chambers through the air inlet of the pressure-bearing shell, is evenly distributed to each air chamber through the through holes in the partition, and finally flows out through each jet hole, forming a complete gas flow process. The gas pressure distribution inside each air chamber and at the jet holes is basically consistent and remains stable, with the gas pressure near the jet hole outlet ranging from 2021 Pa to 4063 Pa. In practical applications, the appropriate gas source pressure can be selected according to the adhesion of the frozen material to adjust the gas pressure near the jet hole outlet, thereby achieving the anti-freeze-sticking effect. It should be noted that the gas pressure values ​​at the air inlet (12000 Pa) and the gas pressure values ​​near the jet hole outlet (2021 Pa, 4063 Pa) listed in the simulation experiment are gauge pressures.

[0077] Another embodiment of the present invention provides a belt conveyor hopper, including a hopper body and a material blocking mechanism. The material blocking mechanism adopts the above-mentioned material blocking mechanism, and the material blocking plate unit in the material blocking mechanism is rotatably disposed in the hopper body.

[0078] The above embodiments are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. A material blocking mechanism for a belt conveyor hopper, characterized by The material blocking mechanism includes a material blocking plate unit and an air supply unit, wherein the material blocking plate unit includes: A pressure-bearing shell, wherein the pressure-bearing shell has an internal cavity; The load-bearing plate is connected to the pressure-bearing shell and forms a receiving cavity between the load-bearing plate and the pressure-bearing shell. The load-bearing plate has a plurality of jet holes penetrating two opposite surfaces of the load-bearing plate. Multiple partitions are disposed between the load-bearing plate and the pressure-bearing shell to divide the receiving chamber into multiple independent air chambers, each of which is in communication with at least one jet hole; The gas supply unit is used to supply gas to all the gas chambers, and the gas in the gas chambers flows out through the jet holes to form a downward airflow on the outer surface of the load plate.

2. The material blocking mechanism for a belt conveyor hopper according to claim 1, characterized in that, The jet holes are arranged obliquely from top to bottom from the inner surface of the load-bearing plate to the outer surface of the load-bearing plate.

3. The apron for a belt conveyor hopper according to claim 1 or 2, characterized in that The gas supply unit includes a gas source and a gas pipeline connected to the gas source. The gas pipeline is also connected to at least one gas chamber, and another gas chamber is connected to the first gas chamber through a through hole opened on the partition.

4. The material blocking mechanism for a belt conveyor hopper according to claim 3, characterized in that, The gas source is a blower, an air compressor, or a gas storage tank; and / or, An air inlet is provided in one of the gas chambers corresponding to the position of the pressure-bearing shell, and the gas pipeline is connected to the gas chamber through the air inlet; and / or, The gas supply unit further includes a pressure sensor installed on the gas pipeline and a safety valve installed on the gas pipeline; and / or, The gas pipeline includes a main pipeline connected to the gas source, a gas distribution groove disposed on the pressure-bearing shell, and a branch pipeline connecting the main pipeline and the gas distribution groove. The gas distribution groove is connected to the partial gas chamber, and the branch pipeline is a flexible hose.

5. The material blocking mechanism for a belt conveyor hopper according to claim 3, characterized in that, The air chambers and jet holes are arranged in a one-to-one correspondence, and the jet holes and air chambers are respectively distributed in an array.

6. The material blocking mechanism for a belt conveyor hopper according to claim 5, characterized in that, In all the air chambers in the same column, through holes are made in the partition between two adjacent air chambers, so that all the air chambers in the same column are connected. The gas pipeline includes a main pipeline connected to the gas source, a gas distribution groove disposed on the pressure-bearing shell, and a branch pipeline connecting the main pipeline and the gas distribution groove. At least one air chamber in each column is connected to a gas distribution groove; the extending direction of the gas distribution groove intersects the extending direction of the column; Multiple gas distribution slots are provided, and the multiple gas distribution slots are spaced apart along the extension direction of the column. Each gas distribution slot is connected to the main pipeline via a branch pipeline.

7. The material blocking mechanism for a belt conveyor hopper according to claim 3, characterized in that, The jet holes and air chambers are irregularly distributed, and the jet holes and air chambers are distributed in a way that is dense in the middle of the load-bearing plate and sparse at the edges.

8. The material blocking mechanism for a belt conveyor hopper according to claim 1, characterized in that, The pressure-bearing shell and the load-bearing plate are detachably connected, and the load-bearing plate is replaceable; A sealing ring is provided between the pressure-bearing shell and the load-bearing plate.

9. A belt conveyor funnel, comprising a funnel body, characterized in that, The funnel further includes a baffle mechanism for a belt conveyor funnel as described in any one of claims 1 to 8, wherein the baffle plate unit is rotatably disposed within the funnel body.

10. A belt conveyor, characterized in that, It includes the belt conveyor hopper as described in claim 9.

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