Automatic air locker device for raw coal bunker

Abstract

The invention relates to the technical field of air locking devices, and discloses a raw coal bunker automatic air locking device which comprises a shell and a local control box, one side of the shell is rotationally connected with a coaxial connecting rod, one end of the coaxial connecting rod is fixedly connected with a fixing ring, the other end of the coaxial connecting rod is fixedly connected with an air locking plate, and the air locking plate is located in the shell; a base is fixedly connected to the outer surface of the shell, an electric push rod is rotationally connected to one side of the base, a rotating ring is fixedly connected to the output end of the electric push rod, a clamping shaft is inserted between the rotating ring and a fixed ring, a sliding plate is fixedly connected to one end of the clamping shaft, and threaded holes are formed in one end of the sliding plate and one end of the clamping shaft. According to the device, air can be efficiently locked, the environmental protection risk existing in external spraying of pulverized coal is effectively solved, the potential safety hazard that sundries enter a bin is avoided, the sealing performance is really achieved, the dust suppression effect is achieved, the flexibility of equipment operation can be improved through switching of an automatic control mode and a manual control mode, and mechanical and dust suppression deep coupling is achieved.

Description

Technical Field

[0001] This invention relates to the field of airlock technology, specifically to an automatic airlock device for raw coal bunkers. Background Technology

[0002] Currently, most raw coal bunkers use buffer airlocks. Buffer airlocks use the impact of falling materials and the weight of the accumulated material to open the closed buffer baffle, allowing the material to pass through smoothly. This causes the induced airflow caused by the material flow to be basically blocked, thereby achieving the purpose of airlocking.

[0003] In daily use, because the buffer airlock uses a lever principle and cannot be switched manually or automatically, it is necessary to manually lock the airlock to clearly see the material level in the raw coal bunker. At this time, the airlock is completely open, which prevents it from achieving its airlocking effect, easily causing coal dust to spill out and pollute the environment. Furthermore, there is a safety hazard of debris entering the raw coal bunker if the airlock is not closed in time. Therefore, to achieve better performance of the airlock and to promote technological advancement in the industry and enhance core technological competitiveness, this application proposes a new implementation scheme that differs from the structure and application method of the automatic airlock in existing technologies. Summary of the Invention (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automatic airlock device for raw coal bunkers. This device primarily aims to solve problems such as dust overflow, debris falling into the bunker, and untimely bunker level monitoring leading to empty bunkers. It provides an intelligent device that integrates mechanical airlock with material level monitoring and alarm, along with deep dry fog dust suppression, achieving automated control of raw coal bunker opening sealing, dust suppression, and equipment coordination.

[0004] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: An automatic airlock device for raw coal bunkers includes a housing and a local control box. A coaxial connecting rod is rotatably connected to one side of the housing, and a fixing ring is fixedly connected to one end of the coaxial connecting rod. An airlock plate is fixedly connected to the other end of the coaxial connecting rod, and the airlock plate is located inside the housing. A base is fixedly connected to the outer surface of the housing, and an electric push rod is rotatably connected to one side of the base. A rotating ring is fixedly connected to the output end of the electric push rod, and a retaining shaft is inserted between the rotating ring and the fixing ring. A sliding plate is fixedly connected to one end of the retaining shaft, and threaded holes are formed at one end of the sliding plate and one end of the retaining shaft. A first sliding frame is fixedly connected to one side of the fixed ring, and sliding holes are provided on both sides of the first sliding frame. The sliding holes are slidably connected to the first sliding frame. A first threaded rod is rotatably connected to the inner side of the first sliding frame, and the first threaded rod is threadedly connected to the inner side of the threaded hole. A servo motor is fixedly connected to one end of the first sliding frame, and the output shaft of the servo motor is keyed to the first threaded rod. An automatic cleaning mechanism is provided on the top of the airlock plate, and a dust suppression mechanism is provided on the inner side of the housing. The dust suppression mechanism is located above the automatic cleaning mechanism. A radar level gauge is fixedly connected to the bottom of the airlock plate.

[0005] Furthermore, the automatic cleaning mechanism includes a first guide rail mounted on the top of the airlock plate, and a second sliding frame slidably connected to the top of the first guide rail. A cleaner is provided at the bottom of the second sliding frame. A second threaded rod is rotatably connected to the top of the airlock plate, and the second threaded rod is threadedly connected to the second sliding frame. Corrugated protective covers are provided at both ends of the second threaded rod, and one end of the corrugated protective cover is fixedly connected to both sides of the second sliding frame. An explosion-proof motor is fixedly connected to the top of the coaxial connecting rod. The output shaft of the explosion-proof motor is keyed to a first connecting shaft. A coupling is provided at one end of the second threaded rod, and a second connecting shaft is provided on the other side of the coupling. Two second guide rails are fixedly connected to the outer surfaces of the first and second connecting shafts. A rotating handle is sleeved on the outer surfaces of the second guide rails, the first connecting shaft, and the second connecting shaft. A sliding groove is provided on the inner side of the rotating handle, and the sliding groove is slidably connected to the second guide rail.

[0006] Based on the aforementioned scheme, the dust suppression mechanism includes multiple universal joint sprayers installed on one side of the inner wall of the housing. A water-air connection pipeline is inserted into one side of the universal joint sprayer, and a connector is fixedly connected to one side of the water-air connection pipeline.

[0007] As a further embodiment of the present invention, a limit switch is fixedly connected to one side of the output shaft of the electric push rod.

[0008] Furthermore, a support base is fixedly connected to the outer side of the housing.

[0009] Based on the aforementioned scheme, a sealing strip is fixedly connected to the outer side of the airlock plate.

[0010] As a further embodiment of the present invention, the top and bottom of the housing are fixedly connected with connecting flanges, a dust cover is fixedly connected to one side of the housing, and the other end of the dust cover is sleeved on the outer surface of the coaxial connecting rod and the second threaded rod.

[0011] Furthermore, the local control box is equipped with a PLC controller, and the door of the local control box is equipped with a display screen, a main switch, an opening indicator light, a cleaning start / stop switch, a dry fog start / stop switch, a manual / automatic switch, and an emergency stop switch.

[0012] (III) Beneficial Effects Compared with the prior art, the present invention provides an automatic airlock device for raw coal bunkers, which has the following beneficial effects: This invention can efficiently lock in air, effectively solving the environmental risks associated with external coal powder spraying and eliminating the safety hazards of debris entering the silo. It truly achieves airtightness and plays a role in dust suppression. Through intelligent control and multi-device intelligent interlocking, the PLC realizes the time-sequential coordinated control of the airlock plate, coal plow, automatic cleaning mechanism and dust suppression mechanism. By switching between automatic and manual control modes, the flexibility of equipment operation is improved. The mechanics and dust suppression are deeply coupled. The state of the airlock plate directly controls the start and stop of the dry fog dust suppression system, realizing "dust suppression as soon as the silo is opened". Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural schematic diagram of an automatic airlock device for raw coal bunkers proposed in this invention; Figure 2 This is a side view of an automatic airlock device for raw coal bunkers proposed in this invention. Figure 3 This is a cross-sectional structural schematic diagram of an automatic airlock device for raw coal bunkers proposed in this invention; Figure 4 This is a cross-sectional view of the first part of an automatic airlock device for raw coal bunkers proposed in this invention. Figure 5 This is a cross-sectional view of the second part of an automatic airlock device for raw coal bunkers proposed in this invention. Figure 6 This is a three-dimensional structural diagram of the local control box of an automatic airlock device for raw coal bunkers proposed in this invention.

[0014] In the diagram: 1. Housing; 2. Coaxial connecting rod; 201. Fixing ring; 3. Airlock plate; 4. Base; 5. Electric push rod; 501. Rotating ring; 6. Limit switch; 7. Snap pin; 8. Sliding plate; 9. Threaded hole; 10. First sliding frame; 11. Sliding hole; 12. First threaded rod; 13. Servo motor; 14. Support base; 15. First guide rail; 16. Second threaded rod; 17. Second sliding frame; 18. Cleaner; 19. Corrugated protective cover; 20. Sealing strip; 21. Explosion-proof motor 22. First connecting shaft; 23. Second connecting shaft; 24. Coupling; 25. Second guide rail; 26. Rotating handle; 27. Slide rail; 28. Dust cover; 29. ​​Universal joint sprayer; 30. Water and air connection pipeline; 31. Connector; 32. Connecting flange; 33. Local control box; 34. Display screen; 35. Main switch; 36. Opening indicator light; 37. Cleaning start / stop switch; 38. Dry fog start / stop switch; 39. Manual / automatic switch; 40. Emergency stop switch; 41. Radar level gauge. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Reference Figures 1-6 An automatic airlock device for raw coal bunkers includes a housing 1 and a local control box 33. The device is characterized in that a coaxial connecting rod 2 is rotatably connected to one side of the housing 1, and a fixing ring 201 is welded to one end of the coaxial connecting rod 2. An airlock plate 3 is welded to the other end of the coaxial connecting rod 2, and the airlock plate 3 is located inside the housing 1. A base 4 is fixed to the outer surface of the housing 1 by bolts, and an electric push rod 5 is rotatably connected to one side of the base 4. A rotating ring 501 is welded to the output end of the electric push rod 5, and a retaining shaft 7 is inserted between the rotating ring 501 and the fixing ring 201. A sliding plate 8 is welded to one end of the retaining shaft 7, and threaded holes 9 are formed at one end of the sliding plate 8 and the retaining shaft 7. The fixing ring... One side of 201 is fixed with a first sliding frame 10 by bolts, and both sides of the first sliding frame 10 are provided with sliding holes 11. The sliding holes 11 are slidably connected to the first sliding frame 10. The inner side of the first sliding frame 10 is rotatably connected with a first threaded rod 12, and the first threaded rod 12 is threadedly connected to the inner side of the threaded hole 9. One end of the first sliding frame 10 is fixed with a servo motor 13 by bolts, and the output shaft of the servo motor 13 is keyed to the first threaded rod 12. The top of the airlock plate 3 is provided with an automatic cleaning mechanism, and the inner side of the housing 1 is provided with a dust suppression mechanism. The dust suppression mechanism is located above the automatic cleaning mechanism. The bottom of the airlock plate 3 is fixed with a radar level gauge 41 by bolts.

[0017] The automatic cleaning mechanism includes a first guide rail 15 mounted on the top of the airlock plate 3, with a second sliding frame 17 slidably connected to the top of the first guide rail 15. A cleaner 18 is located at the bottom of the second sliding frame 17. A second threaded rod 16 is rotatably connected to the top of the airlock plate 3, and the second threaded rod 16 is threadedly connected to the second sliding frame 17. Corrugated protective covers 19 are fitted at both ends of the second threaded rod 16, and one end of each corrugated protective cover 19 is fixed to both sides of the second sliding frame 17 by bolts. The top of the coaxial connecting rod 2 is open... An explosion-proof motor 21 is fixed with bolts. The output shaft of the explosion-proof motor 21 is keyed to a first connecting shaft 22. One end of the second threaded rod 16 is provided with a coupling 24, and the other side of the coupling 24 is provided with a second connecting shaft 23. Two second guide rails 25 are welded to the outer surfaces of the first connecting shaft 22 and the second connecting shaft 23. A rotating handle 26 is sleeved on the outer surfaces of the second guide rails 25, the first connecting shaft 22 and the second connecting shaft 23. A sliding groove 27 is opened on the inner side of the rotating handle 26, and the sliding groove 27 is slidably connected to the second guide rail 25.

[0018] The dust suppression mechanism includes multiple universal joint sprayers 29 installed on one side of the inner wall of the housing 1. A water-air connection pipeline 30 is inserted into one side of the universal joint sprayer 29, and a connector 31 is fixed to one side of the water-air connection pipeline 30 by bolts. A dry fog dust suppression device consisting of a micron-level dry fog machine, a screw air compressor, an air tank, a distribution box, a water-air distributor, a universal joint sprayer assembly, a water-air connection pipeline, and a control signal line is connected to one side of the connector 31. The system is supplied with water by a fire water pipeline leading to the transfer station. It has 4 nozzles arranged in parallel at the entrance of the raw coal bunker. The water supply pressure is 0.4-0.6 MPa, the working water pressure is 0.2-0.4 MPa, and the air pressure is 0.6-0.8 MPa.

[0019] Among them, a limit switch 6 is fixed to one side of the output shaft of the electric push rod 5 by bolts, a support base 14 is fixed to the outside of the housing 1 by bolts, a sealing strip 20 is fixed to the outside of the airlock plate 3 by bolts, connecting flanges 32 are welded to the top and bottom of the housing 1, a dust cover 28 is fixed to one side of the housing 1 by bolts, and the other end of the dust cover 28 is sleeved on the outer surface of the coaxial connecting rod 2 and the second threaded rod 16. The local control box 33 is equipped with a PLC controller. The door of the local control box 33 is equipped with a display screen 34, a main switch 35, an opening indicator light 36, a cleaning start / stop switch 37, a dry fog start / stop switch 38, a manual / automatic conversion switch 39, and an emergency stop switch 40. The PLC controller is electrically connected to the display screen 34, the main switch 35, the opening indicator light 36, the cleaning start / stop switch 37, the dry fog start / stop switch 38, the manual / automatic conversion switch 39, and the emergency stop switch 40, and is electrically connected to the limit switch 6, the servo motor 13, and the explosion-proof motor 21 through wires.

[0020] The working principle of this embodiment is as follows: When in use, the manual / automatic switch 39 needs to be turned on and the operation mode switched to "automatic". After that, the limit switch 6 is interlocked with the belt plow of the coal bunker. When the plow falls, the electric push rod 5 is controlled by the PLC controller to move. The electric push rod 5 pushes the coaxial connecting rod 2 to open the airlock plate 3, and the material enters the bunker normally. At the same time, the dry fog dust suppression mechanism is started. The universal joint sprayer 29 forms a mist water curtain to achieve the purpose of dust suppression. When the plow is lifted, the dust suppression stops. Then, the airlock plate 3 closes to the 80% position after a delay of 3 seconds and stops. The automatic cleaning device then cleans the water stains and coal dust on the surface of the airlock plate 3 for 5 seconds (time adjustable). The explosion-proof motor 21 drives the second threaded rod 16 to rotate through the coupling 24, and then drives the cleaner 18 at the bottom of the second sliding frame 17 to move left and right to clean the top of the airlock plate 3. Then the raw coal bunker opening is closed to 100% and completely sealed, truly achieving the effect of airlock dust suppression and cleaning.

[0021] In automatic mode, the automatic cleaning device operates every 5 seconds (time adjustable). When the surface of the airlock plate 3 is heavily coated with coal, the automatic cleaning device can be switched to manual mode. In this mode, slide the rotating handle 26 along the first connecting shaft 22 and the second connecting shaft 23 to disengage the rotating handle 26 from the first connecting shaft 22. Then, rotate the rotating handle 26 to manually drive the second threaded rod 16 to rotate, thereby cleaning the airlock plate 3. After the coal is cleaned, switch back to "automatic" mode. When the airlock plate 3 is closed, the rear radar level gauge 41 is activated, which can monitor the raw coal silo level in real time and send the signal back to the local control box level display screen 34. When the level is lower than the set value, an audible and visual alarm will be issued to remind the operator to add coal to the silo in time to avoid an empty silo accident. This allows for safer, more efficient, and intuitive observation of the raw coal silo level. Since the fluidity and dust of coal with different moisture content vary in actual operation, the airlock can select the most suitable opening degree according to the actual situation, which is both safe, efficient, and environmentally friendly for adding coal.

[0022] When maintenance work is required or on-site operation is needed, the manual / automatic switch 39 needs to be turned on to switch the operation mode to "manual". In manual mode, the operator can operate any one of the devices, such as the airlock plate, dry fog dust suppression device, or automatic cleaning device, according to the actual work needs. When it is necessary to observe the raw coal bunker material level on-site, when manually operating the airlock, the electric push rod 5 first stops working, and then the servo motor 13 starts, driving the first threaded rod 13 to start, driving the locking shaft 7 and the sliding plate 8 to slide along the first sliding frame 10, so that the locking shaft 7 disengages from the fixed ring 201 and the rotating ring 501. At this time, the coaxial connecting rod can be moved to open the airlock to a suitable opening degree. After use, it should be manually closed. After operation, switch to "automatic" mode, and the airlock plate 3 is restored to standby. Alternatively, when it is necessary to maintain one of the devices, it can be started and operated individually.

[0023] In automatic mode, if the coal plow falls and the air lock plate 3 does not open, the on-site operator can use the emergency stop switch 40 to trip the coal conveyor belt and stop its operation, preventing coal blockage and equipment damage.

[0024] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0025] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic airlock device for raw coal bunkers, comprising a housing (1) and a local control box (33), characterized in that, A coaxial connecting rod (2) is rotatably connected to one side of the housing (1), and a fixing ring (201) is fixedly connected to one end of the coaxial connecting rod (2). An airlock plate (3) is fixedly connected to the other end of the coaxial connecting rod (2), and the airlock plate (3) is located inside the housing (1). A base (4) is fixedly connected to the outer surface of the housing (1), and an electric push rod (5) is rotatably connected to one side of the base (4). A rotating ring (501) is fixedly connected to the output end of the electric push rod (5), and a retaining pin (7) is inserted between the rotating ring (501) and the fixing ring (201). A sliding plate (8) is fixedly connected to one end of the retaining pin (7), and a threaded hole (9) is opened at one end of the sliding plate (8) and the retaining pin (7). A first sliding frame (10) is fixedly connected to the side, and sliding holes (11) are provided on both sides of the first sliding frame (10). The sliding holes (11) are slidably connected to the first sliding frame (10). A first threaded rod (12) is rotatably connected to the inner side of the first sliding frame (10), and the first threaded rod (12) is threadedly connected to the inner side of the threaded hole (9). A servo motor (13) is fixedly connected to one end of the first sliding frame (10), and the output shaft of the servo motor (13) is keyed to the first threaded rod (12). An automatic cleaning mechanism is provided on the top of the airlock plate (3), and a dust suppression mechanism is provided on the inner side of the housing (1). The dust suppression mechanism is located above the automatic cleaning mechanism. A radar level gauge (41) is fixedly connected to the bottom of the airlock plate (3).

2. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, The automatic cleaning mechanism includes a first guide rail (15) mounted on the top of the airlock plate (3), and a second sliding frame (17) slidably connected to the top of the first guide rail (15). A cleaner (18) is provided at the bottom of the second sliding frame (17). A second threaded rod (16) is rotatably connected to the top of the airlock plate (3), and the second threaded rod (16) is threadedly connected to the second sliding frame (17). Corrugated protective covers (19) are provided at both ends of the second threaded rod (16), and one end of the corrugated protective cover (19) is fixedly connected to both sides of the second sliding frame (17). The top of the coaxial connecting rod (2) is fixedly connected to... An explosion-proof motor (21) is keyed to the output shaft of the explosion-proof motor (21) and connected to a first connecting shaft (22). One end of the second threaded rod (16) is provided with a coupling (24), and the other side of the coupling (24) is provided with a second connecting shaft (23). The outer surfaces of the first connecting shaft (22) and the second connecting shaft (23) are fixedly connected to two second guide rails (25). The outer surfaces of the second guide rails (25), the first connecting shaft (22) and the second connecting shaft (23) are fitted with rotating handles (26). The inner side of the rotating handles (26) is provided with a sliding groove (27), and the sliding groove (27) is slidably connected to the second guide rails (25).

3. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, The dust suppression mechanism includes multiple universal joint sprayers (29) installed on one side of the inner wall of the housing (1). A water-air connection line (30) is inserted into one side of the universal joint sprayer (29), and a connector (31) is fixedly connected to one side of the water-air connection line (30).

4. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, A limit switch (6) is fixedly connected to one side of the output shaft of the electric push rod (5).

5. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, A support base (14) is fixedly connected to the outside of the housing (1).

6. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, A sealing strip (20) is fixedly connected to the outer side of the airlock plate (3).

7. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, The top and bottom of the housing (1) are fixedly connected with connecting flanges (32), and a dust cover (28) is fixedly connected to one side of the housing (1). The other end of the dust cover (28) is sleeved on the outer surface of the coaxial connecting rod (2) and the second threaded rod (16).

8. The automatic airlock device for raw coal bunkers according to claim 1, characterized in that, The local control box (33) is equipped with a PLC controller. The door of the local control box (33) is equipped with a display screen (34), a main switch (35), an opening indicator light (36), a cleaning start / stop switch (37), a dry fog start / stop switch (38), a manual / automatic switch (39), and an emergency stop switch (40).

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