Portable coal bunker unblocking and poking air cannon

Abstract

The utility model relates to a portable coal bunker clearing and poking coal air cannon, including pneumatic impact subassembly, pulse gas path subassembly and pneumatic hammer propulsion subassembly, three through tee connections, the pneumatic impact subassembly front end is equipped with the cone spearhead of open and shut, pulse valve is provided with pulse gas path subassembly and connects outside gas source, produces pulse formula impact force when passing in compressed gas, drives the fixed point impact of cone spearhead to coal material arching, pneumatic hammer propulsion subassembly includes pneumatic hammer, switch valve and air inlet connector, after opening can pass through axial impact force to be delivered to pneumatic impact subassembly, to push its into the inside of coal bunker.

Description

Technical Field

[0001] This utility model relates to the field of coal blockage clearing and treatment technology, specifically to a portable coal bunker clearing and coal-pumping pneumatic cannon. Background Technology

[0002] In actual use, the raw coal bunkers of thermal power plants are prone to coal accumulation at the bottom coal chute due to factors such as high moisture content, poor fluidity, variable coal quality, and small flow area. This accumulation and blockage can affect the coal supply to the unit, causing unstable boiler combustion and, in severe cases, boiler shutdown and unplanned unit outages.

[0003] Currently, the common methods for clearing coal blockages in the power industry are manual vibration and tapping or fixed air cannons. These existing technologies have significant limitations. Manual methods are inefficient and fail to clear severe or deep blockages. Fixed air cannons, on the other hand, are limited by their installation location, restricting their operational flexibility and effective area, and failing to provide sufficient impact force or precise targeting. Therefore, a convenient, flexible, and efficient coal bunker clearing device is needed. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, this utility model provides a portable coal bunker clearing and unblocking pneumatic cannon. It employs a dual-air-path system, where a pneumatic hammer propulsion component pushes the unblocking pipe into the coal bunker where coal has formed an arch. Then, a pulse air-path component triggers the conical spearhead to expand, breaking up the coal arch structure and achieving flexible and efficient unblocking, significantly improving unblocking efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a portable coal bunker clearing and coal-pumping pneumatic gun, characterized in that it includes a pneumatic impact component, a pulse air circuit component, and a pneumatic hammer propulsion component.

[0006] The pneumatic impact assembly has an openable and closable conical spearhead at the front end, a segmented coal-pumping pipe in the middle, and a fixed connection at the rear end to the first port of the tee via wire A.

[0007] The pulse air circuit assembly is connected to the second port of the three-way valve and is equipped with a pulse valve and a pulse valve switch. The pulse valve is detachably connected to an external air source via a lever-type quick-connect. When compressed gas is introduced, it can generate a pulse impact force to drive the conical spearhead to make a fixed-point impact on the coal arching point.

[0008] The pneumatic hammer propulsion assembly is connected to the third port of the tee via a quick-connect pneumatic hammer head. It includes a cylinder, piston, air distribution valve, air distribution valve gasket, and body. A switch valve and an air inlet connector are connected to one side of the body. The air inlet connector is connected to an external air source. When compressed gas is introduced, it can generate an axial impact force, driving the pneumatic impact assembly to extend into the coal bunker.

[0009] The conical spearhead is composed of at least three circumferentially distributed claws hinged together. Each claw has a tension spring connected to its inner side. The outer sleeve of the hinge is fitted onto the front end of the coal-pumping pipe, and its outer end is fixedly connected to the base of the conical spearhead. When the pulsed airflow impacts, the claws overcome the tension of the tension springs and unfold outward. After the airflow is released, the claws are pulled back to their original position by the tension springs.

[0010] The pneumatic impact component enters the coal bunker through a pre-set coal-poke hole on the bunker wall. The diameter of the coal-poke hole can be 120mm. The coal-poke pipe has threaded interfaces at both ends, and multiple sections can be connected in series to extend it.

[0011] The pulse air circuit assembly is fixedly connected to the second port of the tee by the pair of wires B, and the pulse valve switch is located on one side of the pulse valve to control the opening and closing of the pulse valve.

[0012] In this configuration, the conical spearhead completely covers the front opening of the hinged outer cylinder when closed, preventing coal from entering the coal-pumping pipe.

[0013] The quick-connect pneumatic hammerhead is coaxially connected to the cylinder, and a quick-locking connector is fitted at the connection. The middle section of the cylinder is fixedly connected to the handle A by a clamp. The rear end of the cylinder is wrapped inside the body and is equipped with a distribution valve and a distribution valve gasket. Compressed gas enters from the air inlet connector, is controlled by the switch valve, and is distributed to the front or rear chamber of the cylinder by the distribution valve, driving the piston to reciprocate. The piston strikes the quick-connect pneumatic hammerhead, transmitting the axial impact force to the pneumatic impact assembly, thereby entering the coal bunker.

[0014] The beneficial effects of this utility model by adopting the above technical solution are as follows:

[0015] This utility model discloses a portable coal bunker clearing and coal-pumping pneumatic cannon. It employs a simple pneumatic impact device and a dual-air-path system. Using an air hammer, the entire coal-pumping tube is driven into any position inside the coal bunker. Then, pulsed gas propels the conical spearhead to unfold, directly targeting the weak points where coal has arched. The destructive force is significantly increased compared to fixed-wall air cannons. It can also intervene multiple times at multiple points, effectively covering a large area, improving clearing efficiency and operational response speed. This utility model, through its modular quick-connect structure and lightweight design, allows for single-person handheld operation. Its high portability allows it to be adapted to any coal-pumping hole on the coal bunker wall. A single unit can cover the entire bunker, eliminating the need for multiple devices fixed at multiple holes, thus helping to reduce coal bunker maintenance costs.

[0016] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1This is a top view of a portable coal bunker clearing and coal-pumping pneumatic cannon of this utility model.

[0018] Figure 2 This is a side view of a portable coal bunker clearing and coal-pumping pneumatic cannon according to this utility model.

[0019] In the diagram: 1-Conical spearhead; 2-Tension spring; 3-Hinge outer cylinder; 4-Coal shovel pipe; 5-Threaded connector A; 6-Tee; 7-Quick-connect pneumatic hammerhead; 8-Quick-connect self-locking connector; 9-Clamping clamp; 10-Cylinder; 11-Piston; 12-Air distribution valve; 13-Air distribution valve gasket; 14-Body; 15-Threaded connector B; 16-Pulse valve; 17-Lever-type quick-connect male; 18-Lever-type quick-connect female; 19-Pulse valve switch; 20-Handle A; 21-Switch valve; 22-Handle B; 23-Air inlet connector. Detailed Implementation

[0020] 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.

[0021] like Figure 1 As shown, this utility model discloses a portable coal bunker clearing and unblocking pneumatic punch, which includes a pneumatic impact assembly, a pulse air circuit assembly, and a pneumatic hammer propulsion assembly.

[0022] like Figure 1 As shown, the pneumatic impact assembly has an openable and closable conical spearhead 1 at the front end, a segmented coal-push pipe 4 in the middle, and a fixed connection at the rear end to the first port of the tee 6 via a wire A5.

[0023] like Figure 1 As shown, the pulse air circuit assembly is connected to the second port of the three-way valve 6, and is equipped with a pulse valve 16 and a pulse valve switch 19. The pulse valve 16 is detachably connected to an external air source via a lever-type quick-connect. When compressed gas is introduced, it can generate a pulse impact force to drive the conical spearhead 1 to make a fixed-point impact on the coal arching point.

[0024] like Figure 1 As shown, the pneumatic hammer propulsion assembly is connected to the third port of the tee 6 via a quick-connect pneumatic hammer head 7. It includes a cylinder 10, a piston 11, an air distribution valve 12, an air distribution valve gasket 13, and a body 14. A switch valve 21 and an air inlet connector 23 are connected to one side of the body 14. The air inlet connector 23 is connected to an external air source. When compressed gas is introduced, it can generate an axial impact force, driving the pneumatic impact assembly to extend into the coal bunker.

[0025] In one embodiment of this utility model, the conical spearhead 1 is composed of at least three circumferentially distributed claw plates hinged together. Each claw plate is connected to a tension spring 2 on its inner side. The hinge outer cylinder 3 is sleeved on the front end of the coal-pumping pipe 4, and its outer end is fixedly connected to the base of the conical spearhead 1. When the pulsed airflow impacts, the claw plates overcome the tension of the tension spring 2 and unfold outward. After the airflow is released, the claw plates are pulled closed and reset by the tension spring 2.

[0026] In one embodiment of this utility model, the pneumatic impact component enters the coal bunker through a pre-set coal-poke hole on the bunker wall. The diameter of the coal-poke hole can be 120mm. The coal-poke pipe 4 is provided with threaded interfaces at both ends, and multiple sections can be extended in series by threading to allow the conical spearhead 1 to enter the interior of the coal bunker by 0.5-1.5m.

[0027] In one embodiment of this utility model, the pulse air circuit assembly is fixedly connected to the second port of the three-way valve 6 by a pair of wires B15, and the pulse valve switch 19 is disposed on one side of the pulse valve 16 for controlling the opening and closing of the pulse valve 16.

[0028] In one embodiment of this utility model, the conical spearhead 1 completely covers the front opening of the hinged outer cylinder 3 in the closed state, preventing coal from entering the coal-pumping pipe 4.

[0029] In one embodiment of this utility model, the quick-connect pneumatic hammer head 7 is coaxially connected to the cylinder 10, and a quick self-locking connector 8 is sleeved at the connection. The middle section of the cylinder 10 is fixedly connected to the handle A20 by a clamp 9. The rear end of the cylinder 10 is wrapped inside the body 14 and is provided with a gas distribution valve 12 and a gas distribution valve gasket 13. Compressed gas enters from the air inlet connector 23, is controlled by the switch valve 21, and is distributed to the front or rear chamber of the cylinder 10 by the gas distribution valve 12, driving the piston 11 to reciprocate. The piston 11 strikes the quick-connect pneumatic hammer head 7, transmitting the axial impact force to the pneumatic impact assembly, thereby entering the coal bunker.

[0030] In summary, this portable coal bunker clearing and unblocking pneumatic cannon has the following advantages: It employs a simple pneumatic impact device and a dual-air-path system. The pneumatic hammer drives the entire unblocking pipe into the coal bunker, effectively penetrating the coal body 0.5-1m deep to reach deep blockage points. Then, pulsed gas propels the conical spearhead to directly target the weak points where coal has arched. The destructive force is significantly increased compared to fixed-wall air cannons. It allows for multiple, multi-point interventions, covering a large effective area, quickly restoring coal flow within the bunker, improving clearing efficiency, increasing operational response speed, and preventing shutdowns due to coal blockages. This invention, through its modular quick-connect structure and lightweight design, allows for single-person handheld operation. The length is adjustable, and the overall portability is high. It can be adapted to any unblocking hole on the coal bunker wall, and a single unit can cover the entire bunker, eliminating the need for multiple devices with multiple fixed holes, thus helping to reduce coal bunker maintenance costs.

[0031] 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 portable coal bunker unblocking and coal-pumping pneumatic punch, characterized in that, include: The pneumatic impact assembly has an openable conical spearhead (1) and a hinged outer cylinder (3) at the front end. The hinged outer cylinder (3) is sleeved on the front end of the coal-pumping pipe (4) and fixedly connected to the base of the conical spearhead (1). The middle part is a segmented coal-pumping pipe (4), and the rear end is fixedly connected to the first port of the tee (6) through the wire A (5). The pulse gas circuit assembly is connected to the second port of the three-way (6) and is equipped with a pulse valve (16) and a pulse valve switch (19). The pulse valve (16) is detachably connected to an external gas source via a lever-type quick-connect. When compressed gas is introduced, it can generate a pulse impact force to drive the conical spearhead (1) to make a fixed-point impact on the coal arching point. The pneumatic hammer propulsion assembly is connected to the third port of the tee (6) via a quick-connect pneumatic hammer head (7). It includes a cylinder (10), a piston (11), a gas distribution valve (12), a gas distribution valve gasket (13), and a body (14). A switch valve (21) and an air inlet connector (23) are connected to one side of the body (14). The air inlet connector (23) is connected to an external air source. When compressed gas is introduced, it can generate an axial impact force to drive the pneumatic impact assembly to extend into the coal bunker.

2. The portable coal bunker unblocking and coal-pumping pneumatic punch according to claim 1, characterized in that, The conical spearhead (1) is composed of at least three circumferentially distributed claws hinged together. Each claw is connected to a tension spring (2) on its inner side. When the pulsed airflow impacts, the claws overcome the tension of the tension spring (2) and unfold outward. After the airflow is released, the claws are pulled closed and reset by the tension spring (2).

3. The portable coal bunker unblocking and coal-pumping pneumatic cannon according to claim 1, characterized in that, The pneumatic impact component enters the coal bunker through a pre-set coal-poke hole on the bunker wall. The diameter of the coal-poke hole can be 120mm. The coal-poke pipe (4) has threaded interfaces at both ends, and multiple sections can be extended in series by connecting the threads.

4. The portable coal bunker unblocking and coal-pumping pneumatic punch according to claim 1, characterized in that, The pulse air circuit assembly is fixedly connected to the second port of the tee (6) by the pair wire B (15), and the pulse valve switch (19) is set on one side of the pulse valve (16) to control the opening and closing of the pulse valve (16).

5. The portable coal bunker unblocking and coal-pumping pneumatic punch according to claim 1, characterized in that, The conical spearhead (1) completely covers the front opening of the hinged outer cylinder (3) in the closed state, preventing coal from entering the coal-pumping pipe (4).

6. The portable coal bunker unblocking and coal-pumping pneumatic punch according to claim 1, characterized in that, The quick-connect pneumatic hammer (7) is coaxially connected to the cylinder (10), and a quick self-locking connector (8) is sleeved at the connection. The middle section of the cylinder (10) is fixedly connected to the handle A (20) by a clamp (9). The rear end of the cylinder (10) is wrapped inside the body (14) and is provided with a gas distribution valve (12) and a gas distribution valve gasket (13). Compressed gas enters from the air inlet connector (23), is controlled by the switch valve (21), and is distributed to the front or rear chamber of the cylinder (10) by the gas distribution valve (12) to drive the piston (11) to reciprocate. The piston (11) strikes the quick-connect pneumatic hammer (7) and transmits the axial impact force to the pneumatic impact assembly, thereby entering the coal bunker.

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