A double-curved nozzle wall-adhering hot air anti-blocking device

Abstract

The utility model relates to a kind of double-curved nozzle wall-attached hot air anti-blocking devices, including layered spraying module, intelligent control unit, and the hot air generation unit of generating and conveying hot compressed air, the layered spraying module is composed of multiple double-curved nozzles around coal hopper wall-attached arrangement, outlet end of the double-curved nozzle is provided with hyperbolic cavity that is first contracted and then expanded along airflow direction, hot compressed air can be accelerated and reduce turbulence, form wall-attached diffusion high-speed hot air flow, for destroying the adhesion of coal and bin wall, the intelligent control unit is used to control hot air generation unit and layered spraying module. The hot air of the utility model can reduce the moisture content and viscosity of coal, fundamentally weaken its arching, wall-sticking condition, nozzle makes hot air flow effectively accelerated, impact force is enhanced, efficient arching, intelligent anti-blocking are realized, and strong sealing, reliable operation, applicable to coal bunker and other material easily blocked industrial scene.

Description

Technical Field

[0001] This utility model relates to the field of coal bunker unblocking technology, specifically to a hyperbolic nozzle wall-mounted hot air anti-blocking device. Background Technology

[0002] In thermal power generation, chemical industry, coal mining and other fields, the storage and transportation of bulk materials (especially pulverized coal) in silos is a common problem. Affected by factors such as material moisture, particle size, viscosity and silo structure, agglomeration is prone to occur near the discharge port, especially when the air temperature reaches below the dew point, resulting in caking, sticking to the wall and reduced fluidity, which can easily lead to coal blockage and coal bridging, seriously affecting production efficiency.

[0003] Existing methods for preventing and clearing blockages have many limitations: traditional methods such as manual tapping are inefficient, labor-intensive, and pose safety hazards; common mechanical vibration methods for silo walls are noisy, energy-intensive, and prone to fatigue damage to the silo structure, and their vibration energy cannot be evenly distributed to every part of the silo, resulting in poor clearing effects. In addition, there are some pneumatic clearing devices such as air cannons and pulsed gas, which use high-pressure gas to impact materials to break blockages, but their point of action is singular, the airflow impact force is insufficient, and they easily form "rat holes" in the material, failing to achieve overall unblocking. Furthermore, they mainly use room temperature gas, which has limited activation and peeling effects on moist and sticky materials.

[0004] In summary, existing technologies are insufficient in solving the problem of blockage by moist and sticky materials, especially lacking a wall-mounted anti-blocking device that can efficiently accelerate airflow, reduce material viscosity using heat energy, and achieve precise control. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a hyperbolic nozzle wall-mounted hot air anti-clogging device, which integrates hot air supply, intelligent control and high-efficiency spraying, and solves the defects of low unclogging efficiency, poor reliability and inability to effectively handle highly wet and viscous materials in the existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a hyperbolic nozzle wall-mounted hot air anti-clogging device, characterized in that it includes a layered blowing module, an intelligent control unit, and a hot air generating unit that generates and delivers hot compressed air.

[0007] The layered injection module consists of multiple hyperbolic nozzles arranged around the coal hopper wall. The outlet end of each hyperbolic nozzle is provided with a hyperbolic cavity. The inner wall of the hyperbolic cavity is a Laval tube structure that first contracts and then expands along the airflow direction. This accelerates the hot compressed air and reduces turbulence, forming a high-speed hot airflow that diffuses along the wall, which is used to break the adhesion between the coal and the hopper wall.

[0008] The intelligent control unit includes a temperature control box, a nozzle control box, and control lines. The temperature control box is electrically connected to the hot air generating unit, and the nozzle control box is connected to the layered blowing module through the control lines.

[0009] The hyperbolic nozzle includes a valve body, a high-temperature resistant diaphragm, a coaxially arranged spring, a hyperbolic cavity, an anti-clogging telescopic stop, a flow regulating plug, and a limiting block. The valve body has an internal flow channel and is equipped with a solenoid valve control interface and an air inlet. The solenoid valve control interface is connected to an intelligent control unit through a control line, and the air inlet is connected to a hot air generating unit through an air inlet pipe.

[0010] The high-temperature resistant diaphragm is located inside the valve body and controls the compressed air injection in response to the solenoid valve signal. The front end of the anti-clogging telescopic stop is a circular plate-shaped stop, and the rear end is a connecting rod. The circular plate-shaped stop matches the size of the outlet end of the hyperbolic cavity. A flow regulating bolt is connected to the connecting rod by an adjustable bolt. The limiting block is fixedly connected to the hyperbolic cavity. The connecting rod passes through the limiting block and slides relative to it. The spring is sleeved between the flow regulating bolt and the limiting block.

[0011] The hot air generating unit includes a gas storage tank, a high-flow filter, a gas heater, and an air inlet pipe connected in sequence. The gas storage tank is equipped with a pressure gauge and connected to a room temperature gas source. The gas heater has a built-in heating tube, a heater cavity, and an insulation layer. The heating tube is connected to a temperature control box through a junction box. The outlet pipe of the gas heater is wrapped with heat tracing and insulation tape.

[0012] The nozzle control box is connected to the material level gauge and the coal feeder in the silo. It can remotely or locally start the injection program according to the material blockage signal and set the pulse timing and operating mode of the hyperbolic nozzle.

[0013] When the solenoid valve is opened, the compressed hot air is accelerated to a critical state through the contraction section of the hyperbolic cavity, and then further accelerated through the expansion section to form supersonic hot air. This concentrates the airflow, pushes the anti-blocking telescopic stop head away from the outlet of the hyperbolic cavity to form an annular airflow, and drives the flow regulating plug to compress the spring axially. After the solenoid valve is closed, the spring drives the anti-blocking telescopic stop head to reset, forming a seal with the hyperbolic cavity to prevent coal powder from entering the nozzle.

[0014] The adjustable bolt can change the axial position of the flow regulating bolt on the connecting rod, thereby changing the maximum extension stroke of the anti-blocking telescopic stop and controlling the opening of the annular airflow channel.

[0015] By adopting the above technical solution, the beneficial effects obtained by this utility model are:

[0016] This invention relates to a hyperbolic nozzle wall-adhering hot air anti-clogging device. It employs an innovative hot air supply and hyperbolic nozzle design. The hot air reduces the moisture content and viscosity of the coal, preventing decreased fluidity when the air temperature drops below the dew point, thus weakening the conditions for arching and wall adhesion. The hyperbolic nozzle, with its Laval nozzle structure, achieves the conversion of hot compressed air to supersonic speed, reducing airflow disturbance and making the outlet airflow more concentrated and directional. This avoids energy loss caused by turbulence in ordinary nozzles, reduces air consumption, and increases impact force and purging efficiency, thereby improving the energy utilization and operational efficiency of the pneumatic system. It forms a high-speed, high-kinetic-energy wall-adhering air knife to peel and purge coal adhering to the bin wall. This invention achieves efficient arch breaking and intelligent anti-clogging. The unique anti-clogging telescopic stop and spring reset structure enable "pulse-type" opening and closing of the nozzle, avoiding self-clogging caused by coal powder backflow, and greatly improving the operational reliability of the device.

[0017] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system layout of a hyperbolic nozzle wall-mounted hot air anti-clogging device according to this utility model.

[0019] Figure 2 This is a cross-sectional view of the hyperbolic nozzle of this utility model.

[0020] Figure 3 This is a cross-sectional view of the hyperbolic nozzle of this utility model during air discharge.

[0021] Figure 4 This is a schematic diagram of the limiting block of this utility model.

[0022] In the diagram: 1-Coal hopper; 2-Hyperbolic nozzle; 21-Solenoid valve control interface; 22-Valve body; 23-Air inlet; 24-High temperature resistant diaphragm; 25-Spring; 26-Hyperbolic cavity; 27-Anti-clogging telescopic stop; 28-Flow regulating plug; 29-Limit block; 3-Control circuit; 4-Air inlet pipe; 5-Heat tracing and insulation tape; 6-Heater inner cavity; 7-Insulation layer; 8-Heating pipe; 9-Junction box; 10-High flow filter; 11-Temperature control box; 12-Nozzle control box; 13-Air storage tank; 14-Pressure gauge; 15-Ambient temperature air source. Detailed Implementation

[0023] 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.

[0024] like Figure 1As shown, the present invention provides a hyperbolic nozzle wall-adhering hot air anti-clogging device, which includes a layered blowing module, an intelligent control unit, and a hot air generating unit that generates and delivers hot compressed air.

[0025] like Figure 1 and Figure 2 As shown, the layered injection module consists of multiple hyperbolic nozzles 2 arranged around the wall of the coal hopper 1. The outlet end of the hyperbolic nozzle 2 is provided with a hyperbolic cavity 26. The inner wall of the hyperbolic cavity 26 is a Laval tube structure that first contracts and then expands along the airflow direction, which accelerates the hot compressed air and reduces turbulence, forming a high-speed hot airflow that diffuses along the wall, which is used to break the adhesion between the coal and the hopper wall.

[0026] like Figure 1 As shown, the intelligent control unit includes a temperature control box 11, a nozzle control box 12, and a control line 3. The temperature control box 11 is electrically connected to the hot air generating unit, and the nozzle control box 12 is connected to the layered blowing module through the control line 3.

[0027] In one embodiment of this utility model, the hyperbolic nozzle 2 includes a valve body 22, a high-temperature resistant diaphragm 24, a spring 25, a hyperbolic cavity 26, an anti-clogging telescopic stop 27, a flow regulating plug 28, and a limiting block 29 arranged coaxially. The valve body 22 has an internal flow channel and is provided with a solenoid valve control interface 21 and an air inlet 23. The solenoid valve control interface 21 is connected to an intelligent control unit through a control line 3, and the air inlet 23 is connected to a hot air generating unit through an air inlet pipe 4.

[0028] like Figure 2 As shown, the high-temperature resistant diaphragm 24 is disposed inside the valve body 22 and controls the compressed air injection in response to the solenoid valve signal. The front end of the anti-clogging telescopic stop 27 is a circular plate-shaped stop, and the rear end is a connecting rod. The circular plate-shaped stop matches the size of the outlet end of the hyperbolic cavity 26. A flow regulating plug 28 is connected to the connecting rod by an adjustable bolt. The limiting block 29 is fixedly connected to the hyperbolic cavity 26. The connecting rod passes through the limiting block 29 and slides relative to it. The spring 25 is sleeved between the flow regulating plug 28 and the limiting block 29.

[0029] In one embodiment of this utility model, the hot air generating unit includes a gas storage tank 13, a high-flow filter 10, a gas heater, and an air inlet pipe 4 connected in sequence. The gas storage tank 13 is equipped with a pressure gauge 14 and connected to a room temperature gas source 15. The gas heater has a built-in heating tube 8, a heater cavity 6, and a heat insulation layer 7. The heating tube 8 is connected to a temperature control box 11 through a junction box 9. The outlet pipe of the gas heater is wrapped with heat tracing and insulation tape 5.

[0030] In one embodiment of this utility model, the gas heater can heat compressed air to 0-150°C, and the heat tracing and insulation belt 5 and the air inlet pipe 4 maintain the hot air temperature above the dew point temperature of the pulverized coal to reduce its viscosity.

[0031] In one embodiment of this utility model, the nozzle control box 12 is connected to the material level gauge in the silo and the coal feeder. It can remotely or locally start the injection program according to the material blockage signal, set the pulse timing and operation mode of the hyperbolic nozzle 2, and adjust the pulse width and period of each hyperbolic nozzle 2 according to the site conditions.

[0032] In one embodiment of this utility model, when the solenoid valve is opened, the compressed hot air is accelerated to a critical state through the contraction section of the hyperbolic cavity 26, and then further accelerated through the expansion section to form supersonic hot air. This concentrates the airflow, pushes the anti-blocking telescopic stop 27 away from the outlet of the hyperbolic cavity 26 to form an annular airflow, and drives the flow regulating plug 28 to compress the spring 25 axially. After the solenoid valve is closed, the spring 25 drives the anti-blocking telescopic stop 27 to reset, forming a seal with the hyperbolic cavity 26 to prevent coal powder from entering the nozzle.

[0033] In one embodiment of this utility model, the annular airflow diffuses along the outlet of the hyperbolic nozzle 2, forming a 360° high-pressure hot air knife, which eliminates the adhesion between coal powder and between coal powder and the bin wall, and its effective blowing diameter is 1-1.5mm.

[0034] like Figure 3 As shown, in one embodiment of this utility model, the axial position of the flow regulating bolt 28 on the connecting rod can be changed by the adjustable bolt, thereby changing the maximum extension stroke of the anti-blocking telescopic stop 27 and controlling the opening of the annular airflow channel.

[0035] In summary, the hyperbolic nozzle wall-mounted hot air anti-clogging device of this utility model has the following advantages: This utility model combines the physical impact of high-speed hot air and the dual effects of thermal drying. The high-speed airflow generated by the hyperbolic nozzle can powerfully peel off the adhesive layer on the bin wall, while the hot air can effectively reduce the humidity and viscosity of the material, thus destroying the conditions for material arching at the source; following the principles of fluid mechanics, compared with traditional nozzles, it can generate stronger impact force with lower air consumption, resulting in significant energy savings; the unique anti-clogging telescopic baffle structure ensures long-term reliable operation of the blowing module in harsh dusty environments; combined with the intelligent control unit, it can realize unattended automated and customized anti-clogging strategies to adapt to various complex working conditions; the opening pressure and spray flow rate of the nozzle can be adjusted through the flow regulating plug, enabling the device to flexibly adapt to the needs of different material characteristics and degrees of clogging.

[0036] 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 hyperbolic nozzle wall-mounted hot air anti-clogging device, characterized in that, It includes a layered blowing module, an intelligent control unit, and a hot air generating unit that generates and delivers hot compressed air; The layered injection module consists of multiple hyperbolic nozzles (2) arranged around the coal hopper (1) wall. The outlet end of the hyperbolic nozzle (2) is provided with a hyperbolic cavity (26). The inner wall of the hyperbolic cavity (26) is a Laval tube structure that first contracts and then expands along the airflow direction, which accelerates the hot compressed air and reduces turbulence, forming a high-speed hot airflow that diffuses along the wall, which is used to break the adhesion between the coal and the hopper wall. The intelligent control unit includes a temperature control box (11), a nozzle control box (12), and a control line (3). The temperature control box (11) is electrically connected to the hot air generating unit, and the nozzle control box (12) is connected to the layered spraying module through the control line (3).

2. The hyperbolic nozzle wall-mounted hot air anti-clogging device according to claim 1, characterized in that, The hyperbolic nozzle (2) includes a valve body (22), a high-temperature resistant diaphragm (24), a spring (25), a hyperbolic cavity (26), an anti-clogging telescopic stop (27), a flow regulating plug (28), and a limiting block (29). The valve body (22) has an internal flow channel and is provided with a solenoid valve control interface (21) and an air inlet (23). The solenoid valve control interface (21) is connected to the intelligent control unit through the control line (3), and the air inlet (23) is connected to the hot air generating unit through the air inlet pipe (4).

3. The hyperbolic nozzle wall-mounted hot air anti-clogging device according to claim 2, characterized in that, The high-temperature resistant diaphragm (24) is installed inside the valve body (22) and controls the compressed air to blow in response to the solenoid valve signal. The front end of the anti-clogging telescopic stop (27) is a circular plate-shaped stop and the rear end is a connecting rod. The circular plate-shaped stop matches the size of the outlet end of the hyperbolic cavity (26). The connecting rod is connected to the flow regulating plug (28) by an adjustable bolt. The limiting block (29) is fixedly connected to the hyperbolic cavity (26). The connecting rod passes through the limiting block (29) and slides relative to it. The spring (25) is sleeved between the flow regulating plug (28) and the limiting block (29).

4. The hyperbolic nozzle wall-mounted hot air anti-clogging device according to claim 1, characterized in that, The hot air generating unit includes a gas storage tank (13), a high-flow filter (10), a gas heater, and an air inlet pipe (4) connected in sequence. The gas storage tank (13) is equipped with a pressure gauge (14) and connected to a room temperature gas source (15). The gas heater has a built-in heating tube (8), a heater cavity (6), and an insulation layer (7). The heating tube (8) is connected to the temperature control box (11) through a junction box (9). The outlet pipe of the gas heater is wrapped with heat tracing insulation tape (5).

5. The hyperbolic nozzle wall-mounted hot air anti-clogging device according to claim 1, characterized in that, The nozzle control box (12) is connected to the material level gauge in the silo and the coal feeder. It can remotely or locally start the injection program according to the blockage signal and set the pulse timing and operation mode of the hyperbolic nozzle (2).

6. The hyperbolic nozzle wall-mounted hot air anti-clogging device according to claim 2, characterized in that, When the solenoid valve is opened, the compressed hot air is accelerated to a critical state through the contraction section of the hyperbolic cavity (26), and then further accelerated through the expansion section to form supersonic hot air, which concentrates the airflow and pushes the anti-blocking telescopic stop (27) away from the outlet of the hyperbolic cavity (26) to form an annular airflow, and drives the flow regulating plug (28) to compress the spring (25) axially. After the solenoid valve is closed, the spring (25) drives the anti-blocking telescopic stop (27) to reset and form a seal with the hyperbolic cavity (26) to prevent coal powder from entering the nozzle.

7. The hyperbolic nozzle wall-mounted hot air anti-clogging device according to claim 3, characterized in that, The axial position of the flow regulating bolt (28) on the connecting rod can be changed by adjusting the bolt, thereby changing the maximum extension stroke of the anti-blocking telescopic stop (27) and controlling the opening of the annular airflow channel.

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