Full-automatic target coal poking air cannon

Abstract

The utility model relates to a full -automatic target coal poking air cannon, including coal bunker, dredging device and automatic propulsion device, and the coal bunker's hopper side wall is provided with the coal poking hole, and is fixedly connected through the base to the automatic propulsion device, the automatic propulsion device is telescopic structure, and is fixedly connected through the connecting block with dredging device, drives the back -and -forth movement of dredging device, the front end of dredging device is provided with the tapered lance head, and the middle part is the sectional type coal poking pipe, and the rear end pulse valve connects the external gas source, the dredging device passes through the coal poking hole and enters the inside of coal bunker, the pulse formula impact force is produced after the pulse valve is passed into compressed air, drives the tapered lance head to fixed point impact at coal material arching place. The utility model provides a kind of plugging removal device that can directly act on coal material arching place, and the effective area is large, the arch breaking efficiency is high, the sealing property is strong, and reliable operation.

Description

Technical Field

[0001] This utility model relates to the field of coal bunker unblocking technology, specifically to a fully automatic targeted coal-clearing pneumatic cannon. Background Technology

[0002] Material blockage is a common problem in coal bunkers and bulk material silos used in thermal power, chemical, and coal mining industries. This is mainly due to a combination of factors, including high moisture content, high viscosity, uneven particle size distribution, poor flowability, and the structural design of the silo. Especially near the discharge port, materials tend to stick and accumulate, severely affecting normal flow and continuous transport.

[0003] In thermal power plants, coal blockage in the raw coal bunker directly affects the stability of coal supply to the unit, leading to unstable boiler combustion and, in severe cases, even boiler shutdown or unplanned unit outages. Common unblocking methods include manual rapping, mechanical vibration, fixed air cannons, and other pneumatic unblocking devices. However, these existing technologies all have significant limitations: manual methods are inefficient, labor-intensive, and unsafe; mechanical vibration methods are noisy, energy-intensive, and prone to damaging the bunker structure, and the vibration energy distribution is uneven; pneumatic unblocking devices (such as air cannons) have problems such as fixed application points, insufficient impact force, and limited airflow coverage, easily creating "rat holes" in the material and failing to completely clear the blockage, especially for moist or sticky materials, where the activation and stripping effect of room temperature airflow is poor.

[0004] Therefore, existing technologies are insufficient for efficient, flexible, and precise unblocking operations, especially when dealing with blockages caused by highly moist and sticky coal. There is an urgent need for an unblocking device that has strong impact force, precise action, controllable energy, and is applicable to various working conditions. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology, this utility model provides a fully automatic targeted coal-clearing pneumatic cannon. Employing a fully automatic targeted design, an automatic propulsion device pushes the unblocking device into the coal bunker where coal has formed an arch. Then, pulsed gas propels a conical spearhead to break up the coal arch structure, achieving flexible and efficient unblocking and significantly improving unblocking efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a fully automatic targeted coal-dredging pneumatic cannon, characterized in that it includes a coal bunker, a dredging device and an automatic propulsion device.

[0007] The coal bunker features a coal-poke hole on its conical hopper sidewall, and an automatic propulsion device is fixedly connected to it via a base. The automatic propulsion device is telescopic and fixedly connected to a clearing device via a connecting block, driving the clearing device to reciprocate. The clearing device has a conical spearhead at its front end, a segmented coal-poke pipe in the middle, and a pulse valve at its rear end connected to an external air source. The clearing device passes through the coal-poke hole into the coal bunker, and compressed air is introduced through the pulse valve to generate a pulsed impact force, driving the conical spearhead to strike the coal at a specific point where it has arched.

[0008] The unblocking device and automatic propulsion device can be installed in multiple units at different heights in the coal bunker. The unblocking device enters the coal bunker through the coal-poke hole. The coal-poke pipe has threaded interfaces at both ends, and multiple sections can be connected in series to extend it.

[0009] The unblocking device further includes bolts, flow regulating bolts, gaskets, springs, limit blocks, and hyperbolic outer cylinders.

[0010] The bolts fix the pulse valve to the air inlet of the coal shovel pipe, the hyperbolic outer cylinder is fixedly connected to the air outlet of the coal shovel pipe, the limiting block is fixed inside the hyperbolic outer cylinder, and the limiting block has a vent hole.

[0011] The conical spearhead has a pointed cone-shaped structure at the front end and a connecting rod at the rear end. A flow regulating bolt and a washer are movably connected to the connecting rod. The connecting rod passes through the limiting block and slides relative to it. The spring is sleeved on the connecting rod, and its two ends are respectively connected to the flow regulating bolt and the limiting block. The flow regulating bolt, spring, limiting block, and connecting rod are all coaxially arranged with the hyperbolic outer cylinder.

[0012] The maximum cross-sectional dimension of the conical spearhead matches the outlet end dimension of the hyperbolic outer cylinder, preventing coal from entering the unblocking device.

[0013] When the pulse valve is opened, the pulsed gas flows through the vent holes of the coal-pumping pipe and the limiting block, and is then accelerated to a critical state by the contraction section of the hyperbolic outer cylinder. It is further accelerated by the expansion section to form a supersonic airflow, which pushes the conical spearhead away from the outlet of the hyperbolic outer cylinder. The conical spearhead and the supersonic airflow together impact the external coal material and drive the flow regulating bolt to compress the spring axially. After the pulse valve is closed, the spring drives the conical spearhead to reset and form a seal with the hyperbolic outer cylinder.

[0014] The axial position of the flow regulating bolt on the connecting rod is adjustable, which changes the maximum extension stroke of the conical spearhead, thereby controlling the opening of the airflow channel.

[0015] The automatic propulsion device includes a power pipe, a cylinder, a servo motor, a reducer, and a synchronization housing.

[0016] The synchronization housing is fixedly installed above the base. A servo motor and a reducer connected to the output end of the servo motor are installed on one side of the upper part of the synchronization housing, and a cylinder and a power pipe are provided on the other side.

[0017] One end of the power pipe is connected to the synchronization housing, and the other end is fixedly connected to the connecting block. The power output by the servo motor is transmitted to the synchronization housing through the reducer, thereby driving the power pipe to move in and out of the cylinder, and thus driving the unblocking device to move back and forth through the connecting block.

[0018] The automatic propulsion device can also be a hydraulic propulsion system or an electro-hydraulic propulsion system.

[0019] The pulse valve is electrically connected to the coal conveying system control unit and responds to the coal blockage signals from the silo level gauge and the coal feeder to control the injection of compressed air.

[0020] By adopting the above technical solution, the beneficial effects obtained by this utility model are:

[0021] This invention relates to a fully automatic targeted coal-clearing pneumatic cannon, employing a fully automatic targeted propulsion and air-solid synergistic impact design. An automatic propulsion device precisely pushes the unblocking device and its front-end conical spearhead into any arched or blocked location within the coal bunker. Compressed air, controlled by a pulse valve, is accelerated through a hyperbolic outer cylinder to form a supersonic airflow, propelling the conical spearhead directly at the weak point of the coal arch. The impact destructive force is significantly increased compared to traditional fixed-wall air cannons. Furthermore, it can automatically intervene multiple times and at multiple points based on coal blockage signals, resulting in a large effective area and more thorough unblocking, greatly improving unblocking efficiency and operational response speed. This invention, through the segmented series-connected coal-clearing pipes and the design of the conical spearhead and spring-driven automatic reset mechanism, allows for flexible adjustment of the unblocking depth and automatic sealing after impact to prevent further blockage. This helps adapt to different coal bunker structures and coal quality conditions, ensuring long-term stable and reliable system operation.

[0022] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a fully automatic targeted coal-pumping pneumatic cannon according to this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of a fully automatic targeted coal-dredging air cannon according to this utility model.

[0025] Figure 3 This is a structural schematic diagram of the automatic propulsion device of a fully automatic targeted coal-pumping pneumatic cannon according to this utility model.

[0026] In the diagram: 1-Coal bunker; 2-Dredging device; 21-Pulse valve; 22-Bolt; 23-Coal shovel pipe; 24-Flow regulating bolt; 25-Gasket; 26-Spring; 27-Limit block; 28-Hyperbolic outer cylinder; 29-Conical spearhead; 3-Connecting block; 4-Automatic propulsion device; 41-Power pipe; 42-Cylinder body; 43-Servo motor; 44-Reducer; 45-Synchronization housing; 5-Coal shovel hole; 6-Base. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, this utility model discloses a fully automatic targeted coal-dredging pneumatic cannon, which includes a coal bunker, a dredging device, and an automatic propulsion device.

[0029] like Figure 1 As shown, the coal bunker has coal-pouring holes on its conical hopper sidewall, and an automatic propulsion device is fixedly connected to it via a base.

[0030] like Figure 1 As shown, the automatic propulsion device is a telescopic structure and is fixedly connected to the unblocking device through a connecting block, driving the unblocking device to move back and forth.

[0031] In one embodiment of this utility model, the unblocking device is provided with a conical spearhead at the front end, a segmented coal-poke pipe in the middle, and a pulse valve at the rear end connected to an external air source. The unblocking device passes through the coal-poke hole and enters the coal bunker. After the pulse valve introduces compressed air, it generates a pulsed impact force, driving the conical spearhead to make a fixed-point impact on the coal arching point.

[0032] like Figure 1 As shown, multiple units of the unblocking device and automatic propulsion device can be installed at different heights in the coal bunker. The unblocking device enters the coal bunker through the coal-poke hole. The coal-poke pipe has threaded interfaces at both ends, and multiple sections can be extended in series by threading.

[0033] In one embodiment of the present invention, the unblocking device further includes a bolt, a flow regulating bolt, a gasket, a spring, a limiting block, and a hyperbolic outer cylinder.

[0034] like Figure 2 As shown, the bolts fix the pulse valve to the air inlet end of the coal shovel pipe, the hyperbolic outer cylinder is fixedly connected to the air outlet end of the coal shovel pipe, the limiting block is fixed inside the hyperbolic outer cylinder, and the limiting block has a vent hole.

[0035] like Figure 2As shown, the front end of the conical spearhead is a pointed cone structure, and the rear end is a connecting rod. A flow regulating bolt and a washer are movably connected to the connecting rod. The connecting rod passes through the limiting block and slides relative to it. The spring is sleeved on the connecting rod, and its two ends are respectively connected to the flow regulating bolt and the limiting block. The flow regulating bolt, spring, limiting block, and connecting rod are all coaxially arranged with the hyperbolic outer cylinder.

[0036] In one embodiment of this utility model, the maximum cross-sectional dimension of the conical spearhead matches the outlet end dimension of the hyperbolic outer cylinder, preventing coal from entering the unblocking device.

[0037] In one embodiment of this utility model, when the pulse valve is opened, the pulsed gas flows through the vent holes of the coal-pumping pipe and the limiting block, and is then accelerated to a critical state by the contraction section of the hyperbolic outer cylinder, and further accelerated by the expansion section to form a supersonic airflow. This airflow pushes the conical spearhead away from the outlet of the hyperbolic outer cylinder. The conical spearhead and the supersonic airflow together impact the external coal material and drive the flow regulating bolt to compress the spring axially. After the pulse valve is closed, the spring drives the conical spearhead to reset and form a seal with the hyperbolic outer cylinder.

[0038] In one embodiment of this utility model, the axial position of the flow regulating bolt on the connecting rod is adjustable, thereby changing the maximum extension stroke of the conical spearhead and controlling the opening of the airflow channel.

[0039] In one embodiment of this utility model, the automatic propulsion device includes a power pipe, a cylinder, a servo motor, a reducer, and a synchronization housing.

[0040] In one embodiment of this utility model, the synchronization housing is fixedly installed above the base. A servo motor and a reducer connected to the output end of the servo motor are installed on one side of the upper part of the synchronization housing, and a cylinder and a power pipe are provided on the other side.

[0041] like Figure 3 As shown, one end of the power pipe is connected to the synchronization housing, and the other end is fixedly connected to the connecting block. The power output by the servo motor is transmitted to the synchronization housing through the reducer, thereby driving the power pipe to move in and out of the cylinder, thus driving the unblocking device to move back and forth through the connecting block.

[0042] In one embodiment of this utility model, the automatic propulsion device may also be a hydraulic propulsion system or an electro-hydraulic propulsion system.

[0043] In one embodiment of this utility model, the pulse valve is electrically connected to the coal conveying system control unit, and responds to the coal blockage signals from the silo level gauge and the coal feeder to control the injection of compressed air.

[0044] In summary, the fully automatic targeted coal-pumping pneumatic cannon of this invention has the following advantages: It employs a simple pneumatic impact device, with precise control of the propulsion distance via a servo motor or hydraulic rod. The entire coal-pumping pipe can be driven into any position inside the coal bunker, effectively penetrating the coal body by 0.5-1m, reaching deep blockage points. The conical tip and high-speed airflow can directly act on weak points at the coal arching points, significantly increasing the destructive force compared to fixed-wall air cannons. It can also intervene multiple times at multiple points, with a large effective area, rapidly restoring coal flow within the bunker, improving unblocking efficiency, increasing operational response speed, and avoiding shutdowns due to coal blockages. This invention, through a coal-pumping pipe structure whose length can be adjusted according to the size of the coal bunker and a gas-solid synergistic impact design, achieves flexible adaptation to unblocking depth, concentrated release of impact energy, and automatic reset sealing. This helps improve the success rate of unblocking high-moisture, sticky coal, reducing manual operation intensity and coal bunker maintenance costs.

[0045] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A fully automatic targeted coal-pumping pneumatic punch, characterized in that, It includes a coal bunker (1), a dredging device (2), and an automatic propulsion device (4); The coal bunker (1) has a coal-pouring hole (5) on the side wall of the cone bucket, and the automatic propulsion device (4) is fixedly connected to it through the base (6); The automatic propulsion device (4) is a telescopic structure and is fixedly connected to the unblocking device (2) through the connecting block (3), driving the unblocking device (2) to move back and forth; The unblocking device (2) has a conical spearhead (29) at the front end, a segmented coal-poke pipe (23) in the middle, and a pulse valve (21) at the rear end connected to an external air source. The unblocking device (2) passes through the coal-poke hole (5) and enters the coal bunker (1). After the pulse valve (21) introduces compressed air, it generates a pulse impact force, which drives the conical spearhead (29) to make a fixed-point impact on the coal arching point.

2. The fully automatic targeted coal-pumping pneumatic punch according to claim 1, characterized in that, The unblocking device (2) and the automatic propulsion device (4) can be installed in multiple units at different heights in the coal bunker (1). The unblocking device (2) enters the coal bunker (1) through the coal-poke hole (5). The coal-poke pipe (23) has threaded interfaces at both ends, and multiple sections can be extended in series by connecting the threads.

3. The fully automatic targeted coal-pumping pneumatic punch according to claim 1, characterized in that, The unblocking device (2) further includes a bolt (22), a flow regulating bolt (24), a gasket (25), a spring (26), a limiting block (27), and a hyperbolic outer cylinder (28); Among them, the bolt (22) fixes the pulse valve (21) to the air inlet end of the coal shovel pipe (23), the hyperbolic outer cylinder (28) is fixedly connected to the air outlet end of the coal shovel pipe (23), the limiting block (27) is fixed inside the hyperbolic outer cylinder (28), and the limiting block (27) has a ventilation hole. The front end of the conical spearhead (29) is a pointed cone structure, and the rear end is a connecting rod. The connecting rod is movably connected to a flow regulating bolt (24) and a gasket (25). The connecting rod passes through the limiting block (27) and slides relative to it. The spring (26) is sleeved on the connecting rod, and its two ends are respectively connected to the flow regulating bolt (24) and the limiting block (27). The flow regulating bolt (24), spring (26), limiting block (27) and connecting rod are all coaxially arranged with the hyperbolic outer cylinder (28).

4. The fully automatic targeted coal-pumping pneumatic punch according to claim 3, characterized in that, The maximum cross-sectional dimension of the conical spearhead (29) matches the outlet end dimension of the hyperbolic outer cylinder (28), preventing coal from entering the dredging device (2).

5. The fully automatic targeted coal-pumping pneumatic punch according to claim 3, characterized in that, When the pulse valve (21) is opened, the pulse gas flows through the vent holes of the coal-pumping pipe (23) and the limiting block (27), and is then accelerated to a critical state by the contraction section of the hyperbolic outer cylinder (28), and further accelerated by the expansion section to form a supersonic airflow, which pushes the conical spearhead (29) away from the outlet of the hyperbolic outer cylinder (28). The conical spearhead (29) and the supersonic airflow together impact the external coal material, and drive the flow regulating bolt (24) to compress the spring (26) axially. After the pulse valve (21) is closed, the spring (26) drives the conical spearhead (29) to reset and form a seal with the hyperbolic outer cylinder (28).

6. The fully automatic targeted coal-pumping pneumatic punch according to claim 3, characterized in that, The axial position of the flow regulating bolt (24) on the connecting rod is adjustable, which changes the maximum push stroke of the conical spearhead (29) and thus controls the opening of the airflow channel.

7. The fully automatic targeted coal-pumping pneumatic punch according to claim 1, characterized in that, The automatic propulsion device (4) includes a power pipe (41), a cylinder (42), a servo motor (43), a reducer (44), and a synchronization housing (45). The synchronous housing (45) is fixedly installed above the base (6). A servo motor (43) and a reducer (44) connected to the output end of the servo motor (43) are installed on one side of the synchronous housing (45), and a cylinder (42) and a power pipe (41) are provided on the other side. One end of the power pipe (41) is connected to the synchronous housing (45), and the other end is fixedly connected to the connecting block (3). The power output by the servo motor (43) is transmitted to the synchronous housing (45) through the reducer (44), thereby driving the power pipe (41) to make telescopic movements along the cylinder (42), thereby driving the unblocking device (2) to move back and forth through the connecting block (3).

8. The fully automatic targeted coal-pumping pneumatic punch according to claim 7, characterized in that, The automatic propulsion device (4) can also be a hydraulic propulsion system or an electro-hydraulic propulsion system.

9. The fully automatic targeted coal-pumping pneumatic punch according to claim 1, characterized in that, The pulse valve (21) is electrically connected to the coal conveying system control unit, responding to the coal blockage signals from the silo level gauge and the coal feeder, and controlling the injection of compressed air.

Images