Split-breathing type air bag anti-blocking throat for coal bunker outlet

Abstract

The present application relates to the technical fields of coal conveying, coal feeding and raw coal bunker anti-blocking, and discloses a split-breathing air bag anti-blocking throat pipe for coal bunker outlet, which comprises a cylinder and an air bag structure arranged inside the cylinder, the air bag structure comprises arc-shaped air bag units arranged along the circumference of the cylinder, and the arc-shaped air bag units form coal falling channels in cooperation with the cylinder; the arc-shaped air bag units are communicated with external gas charging and discharging pipelines, and the gas charging and discharging pipelines are used for inputting or releasing gas into the arc-shaped air bag units to drive the radial expansion or retraction of the arc-shaped air bag units; a connecting flange is arranged on the cylinder, and the connecting flange is used for butt joint installation with the raw coal bunker outlet and the coal feeder inlet, so that the anti-blocking capacity and material passing stability are improved, the coal bunker outlet blocking probability is reduced, and the coal feeder inlet feeding uniformity and continuity are improved without relying on external mechanical arch breaking mechanism.

Description

Technical Field

[0001] This invention relates to the field of coal conveying, coal feeding and raw coal bunker anti-blocking technology in thermal power plants, and in particular discloses a segmented breathing airbag anti-blocking throat for coal bunker outlet. Background Technology

[0002] During operation, coal bunkers in thermal power plants frequently encounter problems such as poor coal feeding, coal bridging, coal blockage, and coal sticking. This is especially true during the rainy season, when coal moisture content is high, coal quality varies significantly, or raw coal particle size is uneven. Coal can easily form bridging at the bunker outlet, coal chute, or feeder inlet. Blockages cause discontinuous coal feeding by the feeder, and in severe cases, can lead to coal mill shutdowns, affecting boiler load stability.

[0003] There are several common on-site handling methods: First, install vibrators on the outer wall of the coal bunker to make the coal fall down through vibration; second, install air cannons on the coal bunker or coal drop pipe to impact and block the coal blocks with compressed air; third, add arch breakers, agitators or loosening machines inside the coal bunker.

[0004] These methods can be effective to some extent, but they also have significant shortcomings. External vibrators exert a large impact on the silo body, which can easily affect the structural lifespan with long-term use, and the effect is not necessarily stable when the vibration reaches the actual coal blockage location. Air cannons have a large impact force, but the airflow direction is concentrated, and sometimes they can only open up local channels; when encountering wet coal sticking to the walls, the effect is also unstable, and they are also prone to generating dust. Built-in mechanical arch breakers are in direct contact with the coal flow for a long time, resulting in heavy wear and tear, and later maintenance is also more troublesome.

[0005] Many coal blockages don't completely seal off initially; instead, a relatively stable coal arch forms at the outlet of the coal chute or raw coal bunker. As long as the pipe wall boundary remains unchanged, the coal arch tends to become increasingly compacted. Many existing devices primarily rely on external tapping, internal stirring, and airflow to flush the coal, without directly altering the shape of the coal chute wall boundary.

[0006] Therefore, there is a need for an anti-blocking device that is simple in structure, suitable for the renovation of old power plants, can directly change the cross-section of the coal chuting channel, and does not require rigid agitators to be inserted into the center of the coal flow for a long time. Summary of the Invention

[0007] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a split-type breathing airbag anti-blockage throat tube for coal bunker outlet.

[0008] To achieve the above objectives, the present invention provides a segmented breathing airbag anti-blockage throat pipe for a coal bunker outlet, comprising a cylinder and an airbag structure disposed inside the cylinder. The airbag structure includes arc-shaped airbag units arranged at intervals along the circumference of the cylinder, the arc-shaped airbag units cooperating with the cylinder to form a coal falling channel; the arc-shaped airbag units are connected to an external inflation / deflation pipeline, the inflation / deflation pipeline being used to input or release gas into the arc-shaped airbag units to drive their radial expansion or contraction; the cylinder is provided with a connecting flange, the connecting flange being used for docking and installation with the raw coal bunker outlet and the coal feeder inlet.

[0009] Preferably, there are several arc-shaped airbag units, which are evenly distributed along the inner wall of the cylinder. Each arc-shaped airbag unit is independently isolated and controlled independently through inflation and deflation pipelines. This allows the coal chutes to form a zonal variable cross-section structure in the circumference, dividing the coal chutes into multiple independently adjustable deformation zones. This avoids the overall channel shrinkage or off-center loading problems caused by the synchronous deformation of the integral airbags, allowing local areas to deform as needed. This enables targeted intervention for local bridging, blockage, or flow deviation, significantly improving the channel's adaptability to non-uniform coal flow.

[0010] Preferably, a radial limiting structure is provided on the cylinder or the arc-shaped airbag unit. The radial limiting structure is used to limit the maximum expansion displacement of the arc-shaped airbag unit towards the inside of the coal drop channel. During the expansion of the airbag, a rigid displacement boundary is provided so that its deformation is always kept within the preset safety range. This avoids secondary blockage or throttling caused by excessive expansion intruding into the flow section. At the same time, it ensures that the arch-breaking effect is concentrated on the effective disturbance range, thereby improving the controllability and stability of the action.

[0011] Preferably, the radial limiting structure is located on the side of the arc-shaped airbag unit away from the coal drop channel or on the circumferential outer side. The radial limiting structure is at least one of the limiting steel strip, limiting plate, limiting mesh or limiting bolt structure. The radial limiting structure is used to mechanically limit the maximum radial expansion of the arc-shaped airbag unit. Through the rigid-flexible coupling constraint formed between the mechanical limiting and the elastic expansion, the airbag maintains a stable deformation trajectory under high pressure inflation conditions, avoids local bulging instability or material fatigue concentration, thereby extending the service life of the airbag structure and improving long-term operational reliability.

[0012] Preferably, there are two connecting flanges, which are respectively located at both ends of the cylinder. The connecting flanges are rigidly connected to the cylinder and are used in conjunction with the outlet flange of the raw coal bunker and the inlet flange of the coal feeder. This allows the anti-clogging throat pipe to be directly embedded into the existing coal conveying system as a standardized module. The modification and installation can be achieved without changing the structure of the upstream and downstream equipment. At the same time, it ensures axial alignment and sealing stability, and reduces the risk of coal leakage or uneven wear caused by installation errors.

[0013] Preferably, the inflation / deflation pipeline is also equipped with a pressure reducing valve, a quick exhaust valve, and a pressure detection unit, which are used to classify and quickly release the inflation pressure of the arc-shaped airbag unit to achieve rapid airbag retraction. This allows for precise and graded control of the internal pressure of the airbag under different operating conditions, and rapid depressurization to create an instantaneous retraction impact effect when needed. This gives the airbag both slow-release regulation capability and transient disturbance capability, thus meeting both daily anti-blockage and emergency clearing operation requirements.

[0014] Preferably, the arc-shaped airbag unit is made of wear-resistant elastic material, which is at least one of pressure-resistant rubber, polyurethane elastomer or fabric-reinforced rubber. The arc-shaped airbag unit bulges inward toward the inside of the coal drop channel when inflated and retracts to the inner wall of the cylinder when deflated, so that it has wear and impact resistance in the long-term coal flow scouring environment. At the same time, the elastic recovery characteristics of the material are used to reduce residual structural deformation, so that the airbag can maintain a stable geometric response under frequent inflation and deflation cycles and avoid excessive performance degradation.

[0015] Preferably, a valve group is provided on the inflation / deflation pipeline. The valve group is used to control the opening and closing of each arc-shaped airbag unit and the inflation / deflation rhythm. The valve group is electrically connected to an external control box. The control box is used to control the arc-shaped airbag unit to work according to a preset mode. The control box is used to control the valve group to execute synchronous inflation / deflation mode, sequential inflation / deflation mode, opposing alternating inflation / deflation mode, and blockage clearing rapid inflation / deflation mode. This causes several arc-shaped airbag units to generate periodic or alternating deformation disturbances in time or space. The actions between each airbag unit are no longer simple synchronous opening and closing, but can construct a combination of temporal differences and spatial disturbances. This forms a continuously changing pressure fluctuation field in the coal drop channel, enhances the disturbance and destruction ability on the coal flow structure, and improves the arch breaking and diversion efficiency.

[0016] Preferably, the control box is used to receive the coal feeder operating current signal, coal flow detection signal, or coal blockage alarm signal, and to determine the coal falling status based on the above signals to automatically start or stop the inflation and deflation control process of the arc-shaped airbag unit. This enables the system to have adaptive control capability based on the operating load, eliminating the need for manual judgment of start and stop, thereby allowing intervention and adjustment in the early stage of blockage, preventing the blockage from expanding further, and improving the foresight of the system response.

[0017] Preferably, the control box is used to preset the high-frequency inflation and deflation sequence control of multiple arc-shaped airbag units, so that each arc-shaped airbag unit repeatedly performs intermittent deformation action by rapidly inflating to a bulging state and then rapidly deflating according to the set cycle, so as to form a pulsed radial disturbance field in the coal falling channel. Through the high-frequency disturbance, the accumulated coal body is subjected to repeated impact and volume change in a short period of time, causing the already formed bridging structure to break quickly and flow again, thereby realizing the transition from "suppressing blockage" to "forced unblocking" and improving the recovery capability under extreme blockage conditions.

[0018] The beneficial effects of this invention are: This technical solution involves installing circumferentially spaced arc-shaped airbag units on the inner side of the cylinder, connecting these units to external inflation / deflation pipelines. In the inflated state, the arc-shaped airbag units expand radially, forming a deformable coal-feeding channel together with the cylinder. In the deflated state, the arc-shaped airbag units retract to release channel space. Simultaneously, connecting flanges ensure reliable connection to the raw coal bunker outlet and the feeder inlet. This synergistic effect allows the coal-feeding channel to dynamically adjust its cross-section and flexibly deform according to the material flow during operation. Furthermore, when coal flows impact or accumulates locally, the periodic expansion of the arc-shaped airbag units disturbs and squeezes the accumulated coal, actively breaking up and clearing blockages and bridging on the inner wall of the cylinder. Simultaneously, under normal conveying conditions, the retraction maintains a stable material flow cross-section. Overall, this solution improves anti-blocking capability and material flow stability, reduces the probability of blockage at the coal bunker outlet, and improves the uniformity and continuity of material supply at the feeder inlet without relying on external mechanical anti-blocking mechanisms. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is one of the structural schematic diagrams of the airbag anti-blockage throat tube of the present invention; Figure 2 This is the second schematic diagram of the airbag anti-blockage throat tube of the present invention; Figure 3 This is a radial planar schematic diagram of the airbag anti-blockage throat tube of the present invention; Figure 4 This is the third schematic diagram of the airbag anti-blockage throat tube of the present invention.

[0020] The reference numerals in the figures include: 1. Cylinder body; 2. Arc-shaped airbag unit; 3. Connecting flange; 4. Radial limiting structure; 5. Inflation / depression pipeline; 6. Valve group; 7. Control box. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0023] See Figure 1-4 A segmented breathing airbag anti-blockage throat pipe for coal bunker outlet includes a cylinder 1 and an airbag structure disposed inside the cylinder 1. The airbag structure includes arc-shaped airbag units 2 arranged at intervals along the circumference of the cylinder 1. The arc-shaped airbag units 2 cooperate with the cylinder 1 to form a coal falling channel. The arc-shaped airbag units 2 are connected to an external inflation / deflation pipeline 5. The inflation / deflation pipeline 5 is used to input or release gas into the arc-shaped airbag units 2 to drive them to expand or contract radially. A connecting flange 3 is provided on the cylinder 1. The connecting flange 3 is used to connect and install with the raw coal bunker outlet and the coal feeder inlet.

[0024] This technical solution involves setting up circumferentially spaced arc-shaped airbag units 2 on the inner side of the cylinder 1, and connecting the arc-shaped airbag units 2 to the external inflation / deflation pipeline 5. In the inflation state, the arc-shaped airbag units 2 are driven to expand radially and together with the cylinder 1 to form a deformable coal dropping channel. In the deflation state, the arc-shaped airbag units 2 retract to release the channel space. At the same time, the connecting flange 3 achieves reliable docking with the raw coal bunker outlet and the coal feeder inlet. The synergistic effect of the above structures allows the coal dropping channel to dynamically adjust its cross-section and flexibly deform according to the material flow state during operation. In the event of coal flow impact or local accumulation, the periodic expansion of the arc-shaped airbag units 2 disturbs and squeezes the accumulated coal to break the arch, thereby actively destroying and clearing the adhesion and bridging blockage on the inner wall of the cylinder 1. At the same time, in the normal conveying state, the retraction maintains a stable material passage cross-section. Overall, it improves the anti-blocking capability and material passage stability, reduces the probability of blockage at the coal bunker outlet, and improves the uniformity and continuity of material supply at the coal feeder inlet without relying on external mechanical arch-breaking mechanisms.

[0025] The arc-shaped airbag unit 2 is composed of multiple sub-airbags connected sequentially in the axial direction. Each sub-airbag is arranged along the axis of the cylinder 1 and forms a continuous or segmented cavity structure, so that the arc-shaped airbag unit 2 with segments in the same circumferential direction has the ability to deform in segments in the axial direction. Thus, during the inflation and deflation process, not only can the circumferential cross section change be realized, but also the local expansion difference along the axial direction can be realized. This makes the coal falling channel form an adjustable spatial deformation area in both the axial and circumferential directions, further enhancing the adaptability to coal arches or wall adhesion areas at different heights. In this embodiment, the number of sub-airbags is specifically three.

[0026] The connecting flange 3 is fixedly disposed at the end of the cylinder 1 along its length. The cylinder 1 is a straight cylinder. In other embodiments, the cylinder 1 may be slightly arc-shaped.

[0027] Specifically, there are several arc-shaped airbag units 2, which are evenly distributed along the inner wall of the cylinder 1. Each arc-shaped airbag unit 2 is independently isolated and controlled independently through the inflation and deflation pipelines 5, so that the coal falling channel forms a partitioned variable cross-section structure in the circumference. This divides the coal falling channel into multiple independently adjustable deformation zones in the circumference, thereby avoiding the overall channel shrinkage or off-center loading problems caused by the synchronous deformation of the integral airbag. This allows local areas to deform as needed, enabling targeted intervention for local bridging, blockage, or flow deviation conditions, and significantly improving the channel's adaptability to non-uniform coal flow.

[0028] Each arc-shaped airbag unit 2 forms an independent deformation zone in the circumferential direction. At the same time, the axial segmented airbags inside each arc-shaped airbag unit 2 are connected to the inflation and deflation pipelines 5, so that the circumferential zone control and the axial segment control can be executed independently or in combination. Thus, under the action of the control box 7, differentiated expansion and contraction at different axial positions within the same circumferential zone can be achieved, expanding the variable cross-sectional shape of the coal drop channel from a two-dimensional circumferential change to a three-dimensional spatial disturbance structure.

[0029] Specifically, a radial limiting structure 4 is provided on the cylinder 1 or the arc-shaped airbag unit 2. The radial limiting structure 4 is used to limit the maximum expansion displacement of the arc-shaped airbag unit 2 towards the inside of the coal falling channel. During the expansion of the airbag, a rigid displacement boundary is provided so that its deformation is always kept within the preset safe range. This avoids secondary blockage or throttling caused by excessive expansion intruding into the flow section. At the same time, it ensures that the arch-breaking effect is concentrated on the effective disturbance range, thereby improving the controllability and stability of the action.

[0030] Specifically, the radial limiting structure 4 is set on the side of the arc-shaped airbag unit 2 away from the coal falling channel or on the circumferential outer side. The radial limiting structure 4 is at least one of the limiting steel strip, limiting plate, limiting mesh or limiting bolt structure. The radial limiting structure 4 is used to mechanically limit the maximum radial expansion of the arc-shaped airbag unit 2. The rigid-flexible coupling constraint formed between the mechanical limiting and the elastic expansion allows the airbag to maintain a stable deformation trajectory under high pressure inflation conditions, avoids local bulging instability or material fatigue concentration, thereby extending the life of the airbag structure and improving long-term operational reliability.

[0031] Specifically, there are two connecting flanges 3, which are respectively located at both ends of the cylinder 1. The connecting flanges 3 are rigidly connected to the cylinder 1 and are used in conjunction with the outlet flange of the raw coal bunker and the inlet flange of the coal feeder. This allows the anti-clogging throat pipe to be directly embedded into the existing coal conveying system as a standardized module. The modification and installation can be achieved without changing the structure of the upstream and downstream equipment. At the same time, it ensures axial alignment and sealing stability, and reduces the risk of coal leakage or uneven wear caused by installation errors.

[0032] Specifically, the inflation / deflation pipeline 5 is also equipped with a pressure reducing valve, a quick exhaust valve, and a pressure detection unit, which are used to classify and quickly release the inflation pressure of the arc-shaped airbag unit 2 to achieve rapid airbag retraction. This allows for precise and graded control of the internal pressure of the airbag under different working conditions, and rapid depressurization to create an instantaneous retraction impact effect when needed. This enables the airbag to have both slow-release regulation capability and transient disturbance capability, thus meeting both daily anti-blockage and emergency clearing operation requirements.

[0033] Specifically, the arc-shaped airbag unit 2 is made of wear-resistant elastic material, which is at least one of pressure-resistant rubber, polyurethane elastomer or fabric-reinforced rubber. When inflated, the arc-shaped airbag unit 2 bulges towards the inside of the coal drop channel and when deflated, it retracts to the inner wall of the cylinder 1, so that it has wear and impact resistance in the long-term coal flow scouring environment. At the same time, the elastic recovery characteristics of the material are used to reduce residual structural deformation, so that the airbag can maintain a stable geometric response under frequent inflation and deflation cycles and avoid excessive performance degradation.

[0034] Specifically, the inflation / deflation pipeline 5 is equipped with a valve group 6, which is used to control the opening and closing of each arc-shaped airbag unit and the inflation / deflation rhythm. The valve group 6 is electrically connected to the external control box 7, which is used to control the arc-shaped airbag unit 2 to work according to a preset mode. The control box 7 is used to control the valve group 6 to execute synchronous inflation / deflation mode, sequential inflation / deflation mode, opposing alternating inflation / deflation mode, and blockage clearing rapid inflation / deflation mode, so that several arc-shaped airbag units 2 will generate periodic or alternating deformation disturbances in time or space. This makes the actions between each airbag unit no longer a simple synchronous opening and closing, but can construct a combination of temporal differences and spatial disturbances, thereby forming a continuously changing pressure fluctuation field in the coal falling channel, enhancing the disturbance and destruction ability on the coal flow structure, and improving the arch breaking and diversion efficiency.

[0035] In the unblocking control mode, valve group 6 works in conjunction with the fast exhaust valve to enable the charging and discharging pipeline 5 to switch between high-flow rapid charging and rapid discharging in a short time. At the same time, control box 7 performs high-frequency trigger control on the action sequence of each arc-shaped airbag unit 2, so that each arc-shaped airbag unit 2 forms an intermittent synchronous or alternating rapid deformation response in the axial and circumferential distribution areas. This creates transient pressure fluctuations and radial impact disturbance fields inside the coal falling channel to destroy the formed coal arch structure and restore the material passing state.

[0036] Specifically, the control box 7 is used to receive the coal feeder operating current signal, coal flow detection signal or coal blockage alarm signal, and judge the coal falling status according to the above signals to automatically start or stop the inflation and deflation control process of the arc-shaped airbag unit 2, so that the system has the adaptive control capability based on the operating load, no longer relying on manual judgment of start and stop, thus enabling intervention and adjustment in the early stage of blockage, avoiding further expansion of the blockage state, and improving the foresight of the system response.

[0037] Specifically, the control box 7 is used to preset the high-frequency inflation and deflation sequence control of multiple arc-shaped airbag units 2, so that each arc-shaped airbag unit 2 repeatedly performs intermittent deformation action by rapidly inflating to a bulging state and then rapidly deflating according to the set cycle, so as to form a pulsed radial disturbance field in the coal falling channel. Through the high-frequency disturbance, the accumulated coal body is subjected to repeated impact and volume change in a short period of time, causing the already formed bridging structure to break quickly and flow again, thereby realizing the transition from "suppressing blockage" to "forced unblocking" and improving the recovery capability under extreme blockage conditions.

[0038] The arc-shaped airbag unit 2, through the combined action of the circumferential segmented structure and the axial segmented structure, enables the coal drop channel to form a three-dimensional variable cross-section structure that can change periodically during operation. This variable cross-section structure exhibits local contraction and expansion in the radial direction, alternating deformation in the circumferential direction, and segmented differential bulging in the axial direction, thereby causing the coal flow support boundary to change continuously and disrupting the stable stress conditions for the formation of the coal arch.

[0039] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A segmented breathing airbag anti-blockage throat tube for use at the outlet of a coal bunker, characterized in that, It includes a cylinder (1) and an airbag structure located inside the cylinder (1). The airbag structure includes arc-shaped airbag units (2) arranged at intervals along the circumference of the cylinder (1). The arc-shaped airbag units (2) cooperate with the cylinder (1) to form a coal drop channel. The arc-shaped airbag units (2) are connected to an external gas filling and releasing pipeline (5). The gas filling and releasing pipeline (5) is used to input or release gas into the arc-shaped airbag units (2) to drive them to expand or contract radially. A connecting flange (3) is provided on the cylinder (1). The connecting flange (3) is used to connect and install with the outlet of the raw coal bunker and the inlet of the coal feeder.

2. The segmented breathing airbag anti-blockage throat tube for coal bunker outlet according to claim 1, characterized in that: There are several arc-shaped airbag units (2). The several arc-shaped airbag units (2) are evenly distributed along the inner wall of the cylinder (1) in the circumferential direction. Each arc-shaped airbag unit (2) is independently isolated and independently controlled by the inflation and deflation pipeline (5) so that the coal drop channel forms a partitioned variable cross section structure in the circumferential direction.

3. A segmented breathing airbag anti-blockage throat tube for a coal bunker outlet according to claim 1 or 2, characterized in that: A radial limiting structure (4) is provided on the cylinder (1) or the arc-shaped airbag unit (2). The radial limiting structure (4) is used to limit the maximum bulging displacement of the arc-shaped airbag unit (2) towards the inside of the coal drop channel.

4. The segmented breathing airbag anti-blockage throat tube for coal bunker outlet according to claim 3, characterized in that: The radial limiting structure (4) is set on the side of the arc-shaped airbag unit (2) away from the coal drop channel or on the circumferential side. The radial limiting structure (4) is at least one of the limiting steel strip, limiting plate, limiting mesh or limiting bolt structure. The radial limiting structure (4) is used to mechanically limit the maximum radial expansion of the arc-shaped airbag unit (2).

5. The segmented breathing airbag anti-blockage throat tube for coal bunker outlet according to claim 1, characterized in that: There are two connecting flanges (3), which are respectively located at the two ends of the cylinder (1) in the axial direction. The connecting flanges (3) are rigidly connected to the cylinder (1) and are used in conjunction with the outlet flange of the raw coal bunker and the inlet flange of the coal feeder.

6. The segmented breathing airbag anti-blockage throat tube for coal bunker outlet according to claim 1, characterized in that: The inflation / deflation pipeline (5) is also equipped with a pressure reducing valve, a quick exhaust valve and a pressure detection unit, which are used to adjust the inflation pressure of the arc-shaped airbag unit (2) in stages and release it quickly so as to realize the rapid retraction action of the airbag.

7. The segmented breathing airbag anti-blockage throat tube for coal bunker outlet according to claim 1, characterized in that: The arc-shaped airbag unit (2) is made of wear-resistant elastic material, which is at least one of pressure-resistant rubber, polyurethane elastomer or fabric-reinforced rubber. The arc-shaped airbag unit (2) bulges towards the inside of the coal drop channel when inflated and retracts to the inner wall of the cylinder (1) when deflated.

8. A segmented breathing airbag anti-blockage throat tube for a coal bunker outlet according to claim 1, characterized in that: A valve group (6) is provided on the inflation / deflation pipeline (5). The valve group (6) is used to control the opening and closing of each arc-shaped airbag unit and the inflation / deflation rhythm. The valve group (6) is electrically connected to the external control box (7). The control box (7) is used to control the arc-shaped airbag unit (2) to work according to the preset mode. The control box (7) is used to control the valve group (6) to execute the synchronous inflation / deflation mode, the sequential inflation / deflation mode, the opposing alternating inflation / deflation mode, and the clearing and rapid inflation / deflation mode, so that several arc-shaped airbag units (2) will generate periodic or alternating deformation disturbances in time or space.

9. A segmented breathing airbag anti-blockage throat tube for a coal bunker outlet according to claim 8, characterized in that: The control box (7) is used to receive the coal feeder operating current signal, coal flow detection signal or coal blockage alarm signal, and to determine the coal falling status based on the above signals so as to automatically start or stop the inflation and deflation control process of the arc-shaped airbag unit (2).

10. A segmented breathing airbag anti-blockage throat tube for a coal bunker outlet according to claim 9, characterized in that: The control box (7) is used to perform preset high-frequency inflation and deflation timing control on multiple arc-shaped airbag units (2), so that each arc-shaped airbag unit (2) repeatedly performs intermittent deformation action in a way that rapidly inflates to the bulging state and then rapidly deflates according to the set cycle, so as to form a pulsed radial disturbance field in the coal drop channel.

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