Explosion-proof full-automatic unloading centrifuge with nitrogen protection mechanism

Abstract

The utility model provides a kind of explosion-proof full-automatic unloading centrifuge with nitrogen protection mechanism, including centrifuge body and gas supply mechanism, the centrifuge body includes base, cylinder, upper cover, drum and adjusting mechanism. Nitrogen can be introduced into the inside of centrifuge body by nitrogen inlet pipe, carousel, passageway and lower discharge port, and the internal oxygen is replaced, the oxygen content in the inside of centrifuge body is reduced, the safety in the working process of centrifuge body is guaranteed, and the cooperative matching of driving motor, transmission mechanism, first rotary rod, second rotary rod and gear set is used, and the pressure and oxygen content in the inside of centrifuge body are monitored in real time using pressure sensor and oxygen concentration sensor, nitrogen is conveniently introduced into the inside of centrifuge body intermittently, the nitrogen and flue gas content in its inside are guaranteed, solid-liquid separation of flammable and explosive organic solvent is facilitated, the security risk of centrifuge body is reduced, and the practicability of the mechanism is improved.

Description

Technical Field

[0001] This utility model relates to the field of fully automatic unloading centrifuge technology, specifically an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism. Background Technology

[0002] Fully automatic unloading centrifuges are widely used separation equipment in the chemical, pharmaceutical, and food industries to separate solid particles from liquids in suspensions. When the materials being processed contain flammable and explosive organic solvents (such as methanol, methyl ether, benzene, etc.), there are significant safety hazards during high-speed centrifugation: First, the material's violent friction with components such as the rotating drum and distribution disc during rotation may generate high temperatures or sparks sufficient to ignite solvent vapors; second, the powerful centrifugal force causes friction and collisions between solid particles and between particles and the equipment, easily generating and accumulating static electricity, which can also trigger an explosion upon electrostatic discharge.

[0003] Currently, common protective measures mainly involve using explosion-proof motors and electrical appliances. However, this only addresses the source of electrical sparks and does not solve the problem of ignition sources generated by friction and static electricity. Therefore, the most fundamental solution is to eliminate the oxidizer—oxygen—from the environment. The traditional method is to manually purge the centrifuge with nitrogen before centrifugation. However, the reliability of this method depends entirely on manual operation, and there are risks such as incomplete purging, forgetting to perform the operation, and lack of real-time monitoring, resulting in significant safety hazards.

[0004] Therefore, there is an urgent need for an automatic, reliable, and real-time monitoring inert gas protection system that can be integrated into the centrifuge control to fundamentally prevent flash explosion accidents.

[0005] Therefore, this utility model provides an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide an explosion-proof, fully automatic unloading centrifuge with a nitrogen protection mechanism, solving the problems mentioned in the background section. This invention allows nitrogen to be introduced into the centrifuge body through a nitrogen inlet pipe, turntable, channel, and outlet, replacing internal oxygen and reducing its concentration, thus ensuring safety during operation. Furthermore, through the coordinated operation of a drive motor, transmission mechanism, first rotating rod, second rotating rod, and gear set, and by using pressure and oxygen concentration sensors to monitor the internal pressure and oxygen content in real time, nitrogen can be intermittently introduced into the centrifuge body to maintain adequate nitrogen and flue gas levels. This facilitates solid-liquid separation of flammable and explosive organic solvents, reducing safety hazards and improving the practicality of the mechanism.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism, comprising a centrifuge body and an air supply mechanism. The centrifuge body includes a base, a cylinder, a top cover, a rotating drum, and an adjustment mechanism. The cylinder is fixedly installed on the top of the base, and the top cover is installed on the top of the cylinder through the adjustment mechanism. From left to right, a scraper mechanism, a pressure sensor, a feed pipe, a feeding mechanism, an exhaust pipe, and an oxygen concentration sensor fixedly installed inside the top of the exhaust pipe are fixedly installed on the top of the top of the top cover. The exhaust pipe is T-shaped, and an exhaust solenoid valve is fixedly installed at one end of the exhaust pipe. The air supply mechanism includes a nitrogen inlet pipe, a turntable, a channel, and a gear set. The channel is opened inside one end of the base, and the nitrogen inlet pipe is fixedly connected to the front side of one end of the base corresponding to the channel position. The turntable is rotatably installed inside one end of the channel, and an L-shaped through groove is opened inside the turntable. A filter screen is fixedly installed inside the other end of the channel, and a second rotating rod is fixedly installed inside the bottom of the turntable corresponding to the bottom end of the base.

[0008] Furthermore, a support cylinder is fixedly installed on the inner side of the cylinder corresponding to the top of the base. The inner side of the support cylinder is provided with a lower drain port in a circular pattern inside the base. A fixing cover is fixedly installed on the bottom of the base below the lower drain port. A drive motor is fixedly installed inside the fixing cover corresponding to the bottom of the base. A drain pipe is fixedly connected to the bottom of one end of the base corresponding to the inner side of the cylinder. Support legs are fixedly installed at the four corners of the bottom of the base.

[0009] Furthermore, the drum is fixedly installed at the top of the output shaft of the drive motor corresponding to the top of the support cylinder. The drum is movably disposed inside the cylinder. The bottom of the drum has a circularly distributed lower discharge port. A rubber ring is fixedly installed at the bottom of the upper cover corresponding to the position of the drum. The rubber ring is in close contact with the top of the drum.

[0010] Furthermore, a discharge cylinder is fixedly installed below the lower discharge port on the outer side of the fixed cover. An isolation tube is fixedly installed between one end of the fixed cover and the discharge cylinder. A horizontal plate is fixedly installed on the outer wall of the discharge cylinder. A first rotating rod is rotatably installed between the top of the horizontal plate and the bottom wall of the base. A transmission mechanism is installed between the first rotating rod and the output shaft of the drive motor. The transmission mechanism includes a pulley and a belt. The pulley is fixedly installed on the drive motor and the first rotating rod. The belt is movably installed between the two pulleys and is located inside the isolation tube. The channel is fixedly connected to the lower discharge port.

[0011] Furthermore, the gear set is disposed between the top end of the first rotating rod and the second rotating rod. The gear set includes a first gear and a second gear. The first gear and the second gear are respectively fixedly installed on the top ends of the first rotating rod and the second rotating rod. The first gear and the second gear mesh with each other and are arranged in parallel. The bottom end of the second rotating rod is rotatably installed inside the top end of the horizontal plate.

[0012] Furthermore, the adjustment mechanism includes a first fixed plate, a second fixed plate, and a hydraulic rod. The first fixed plate is fixedly installed at one end of the top cover, and the second fixed plates are symmetrically fixedly installed on both sides of the outer wall at the top of the cylinder. The first fixed plate is T-shaped, and the bottom end of the first fixed plate is movably installed between the two second fixed plates via a rotating shaft. The hydraulic rod is movably installed between the base and the first fixed plate via a rotating shaft provided at its bottom end and output end.

[0013] Furthermore, the scraper mechanism includes an electric push rod, a crossbar is fixedly installed on one side of the bottom end of the output rod of the electric push rod, an arc-shaped scraper is fixedly installed on one end of the crossbar, the bottom of the arc-shaped scraper is provided with an inclined surface, and the arc-shaped scraper is in close contact with the inner wall of the drum.

[0014] Furthermore, the fabric feeding mechanism includes a fabric feeding motor, a rotating rod, and a fabric feeding disc. The rotating rod is fixedly installed at the bottom end of the output shaft of the fabric feeding motor. The fabric feeding motor is tilted and fixedly installed on the top of the upper cover. The fabric feeding disc is fixedly installed above the bottom end of the rotating rod, corresponding to the middle position of the drum. The bottom end of the feed pipe is fixedly connected to the outer wall of the fabric feeding disc. A cleaning pipe is fixedly installed on one side of the top end of the feed pipe.

[0015] The beneficial effects of this utility model are as follows: This utility model discloses an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism. Nitrogen gas is introduced into the centrifuge body through a nitrogen inlet pipe, turntable, channel, and bottom outlet, replacing the internal oxygen and reducing its content. This ensures the safety of the centrifuge during operation. Furthermore, through the coordinated operation of the drive motor, transmission mechanism, first rotating rod, second rotating rod, and gear set, and by using pressure and oxygen concentration sensors to monitor the internal pressure and oxygen content of the centrifuge body in real time, nitrogen gas can be intermittently introduced into the centrifuge body to maintain adequate nitrogen and flue gas levels. This facilitates solid-liquid separation of flammable and explosive organic solvents, reduces safety hazards associated with the centrifuge body, and improves the practicality of the mechanism. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism according to this utility model; Figure 2This is a front cross-sectional view of an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism according to this utility model. Figure 3 This utility model relates to an explosion-proof, fully automatic unloading centrifuge with a nitrogen protection mechanism. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of a portion of the structure of an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism according to this utility model; Figure 5 This utility model relates to an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism. Figure 4 Enlarged view at point B in the middle; Figure 6 This is a diagram of the rotary structure of an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism according to this utility model. Figure 7 This is a structural diagram of the scraper mechanism of an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism according to this utility model; Figure 8 This is a structural diagram of the drum of an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism according to this utility model. In the diagram: 1. Base; 2. Support leg; 3. Cylinder; 4. Top cover; 5. Scraper mechanism; 6. Fabric feeding mechanism; 7. Feed pipe; 8. First fixed plate; 9. Second fixed plate; 10. Hydraulic rod; 11. Discharge cylinder; 12. Nitrogen inlet pipe; 13. Exhaust pipe; 14. Oxygen concentration sensor; 15. Pressure sensor; 16. Drain pipe; 17. Support cylinder; 18. Rotary drum; 19. Drive motor; 20. Fixed cover; 21. Isolation pipe; 22. Transmission mechanism; 23. First rotating rod; 24. Second rotating rod; 25. Gear set; 26. Turntable; 27. Channel; 28. Filter screen; 29. ​​L-shaped through groove; 30. Electric push rod; 31. Crossbar; 32. Arc-shaped scraper. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figures 1 to 8This utility model provides a technical solution: an explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism, comprising a centrifuge body and an air supply mechanism. The centrifuge body includes a base 1, a cylinder 3, a top cover 4, a rotating drum 18, and an adjustment mechanism. The cylinder 3 is fixedly installed on the top of the base 1. The top cover 4 is installed on the top of the cylinder 3 via the adjustment mechanism. From left to right, the top of the top cover 4 is fixedly installed with a scraper mechanism 5, a pressure sensor 15, a feed pipe 7, a cloth feeding mechanism 6, an exhaust pipe 13, and an oxygen concentration sensor 14 fixedly installed inside the top of the exhaust pipe 13. The exhaust pipe 13 is T-shaped, and an exhaust solenoid valve is fixedly installed at one end of the exhaust pipe 13. The air supply mechanism includes a nitrogen inlet pipe 12, a rotating disc 26, a channel 27, and a gear set 25. The channel 27 is opened in one of the base 1... Inside the centrifuge, the nitrogen inlet pipe 12 is fixedly connected to the front side of one end of the base 1 at the position corresponding to the channel 27. The turntable 26 is rotatably installed inside one end of the channel 27. An L-shaped through groove 29 is opened inside the turntable 26. A filter screen 28 is fixedly installed inside the other end of the channel 27. A second rotating rod 24 is fixedly installed inside the bottom of the turntable 26 corresponding to the bottom end of the base 1. The oxygen concentration and pressure inside the centrifuge body can be monitored in real time through the pressure sensor 15 and the oxygen concentration sensor 14. Nitrogen is introduced into the centrifuge body through the gas supply mechanism such as the turntable 26 and the nitrogen inlet pipe 12 to ensure that the inside of the centrifuge body is in a slightly positive pressure environment, ensuring that outside air cannot enter, while increasing the oxygen concentration inside the centrifuge body, improving the safety of the centrifuge body during operation, and making it highly practical.

[0019] In this embodiment, a support cylinder 17 is fixedly installed on the inner side of the cylinder 3 corresponding to the top of the base 1. The inner side of the support cylinder 17 has circularly distributed lower drain ports corresponding to the interior of the base 1. A fixing cover 20 is fixedly installed below the lower drain ports on the bottom of the base 1. A drive motor 19 is fixedly installed inside the fixing cover 20 corresponding to the bottom of the base 1. A drain pipe 16 is fixedly connected to the bottom of one end of the base 1 corresponding to the inner side of the cylinder 3. Support legs 2 are fixedly installed at the four corners of the bottom of the base 1. The rotating drum 18 is fixedly installed at the top of the output shaft of the drive motor 19 corresponding to the top of the support cylinder 17. The rotating drum 18 is movably disposed inside the cylinder 3. The bottom end of the upper cover 4 has a circularly distributed lower discharge port. A rubber ring is fixedly installed at the bottom of the upper cover 4 corresponding to the position of the drum 18. The rubber ring is in close contact with the top of the drum 18. A discharge cylinder 11 is fixedly installed below the lower discharge port corresponding to the outer side of the fixed cover 20. An isolation tube 21 is fixedly installed between one end of the fixed cover 20 and the discharge cylinder 11. A horizontal plate is fixedly installed on the outer wall of the discharge cylinder 11. A first rotating rod 23 is rotatably installed between the top of the horizontal plate and the bottom wall of the base 1. A transmission mechanism 22 is installed between the first rotating rod 23 and the output shaft of the drive motor 19. The transmission mechanism 22 includes a pulley and a belt. The pulley is fixedly installed... The belt is movably mounted between the two pulleys on the drive motor 19 and the first rotating rod 23 and is located inside the isolation pipe 21. The channel 27 is fixedly connected to the lower discharge port. The gear set 25 is located between the top of the first rotating rod 23 and the second rotating rod 24. The gear set 25 includes a first gear and a second gear. The first gear and the second gear are respectively fixedly mounted on the top of the first rotating rod 23 and the top of the second rotating rod 24. The first gear and the second gear mesh with each other and are arranged in parallel. The bottom end of the second rotating rod 24 is rotatably mounted inside the top of the horizontal plate. The drive motor 19 can drive the drum 18 to rotate inside the cylinder 3 and the upper cover 4 to facilitate the feeding of the liquid. During centrifugal filtration, the drive motor 19, through a transmission mechanism 22 including pulleys and belts, drives the first rotating rod 23 to rotate between the horizontal plate and the base 1. The first rotating rod 23, through the action of a gear set 25 including a first gear and a second gear, drives the second rotating rod 24 to rotate. The gear set 25, including the first gear and the second gear, is a reduction mechanism, which can drive the turntable 26 to rotate slowly through the second rotating rod 24. This facilitates the connection between the L-shaped groove 29 and the channel 27 and the nitrogen inlet pipe 12 through the rotation of the turntable 26, allowing for the intermittent introduction of nitrogen into the centrifuge body to ensure the oxygen content and slight positive pressure inside the centrifuge body, which is convenient for subsequent centrifugal filtration of the liquid.

[0020] In this embodiment, the adjustment mechanism includes a first fixed plate 8, a second fixed plate 9, and a hydraulic rod 10. The first fixed plate 8 is fixedly installed at one end of the upper cover 4, and the second fixed plates 9 are symmetrically fixedly installed on both sides of the outer wall of the top of the cylinder 3. The first fixed plate 8 is T-shaped, and the bottom end of the first fixed plate 8 is movably installed between the two second fixed plates 9 via a rotating shaft. The hydraulic rod 10 is movably installed between the base 1 and the first fixed plate 8 via a rotating shaft at its bottom end and output end. The hydraulic rod 10 can push and pull the first fixed plate 8, which facilitates the rotation adjustment of the upper cover 4 by the action of the first fixed plate 8 and the second fixed plate 9, and can open and close the centrifuge body, which is convenient for subsequent centrifugal filtration of the liquid.

[0021] In this embodiment, the scraper mechanism 5 includes an electric push rod 30. A crossbar 31 is fixedly installed on one side of the bottom end of the output rod of the electric push rod 30. An arc-shaped scraper 32 is fixedly installed on one end of the crossbar 31. The bottom of the arc-shaped scraper 32 is provided with an inclined surface. The arc-shaped scraper 32 is in close contact with the inner wall of the drum 18. By adjusting the descent of the arc-shaped scraper 32 through the electric push rod 30, the solid material on the inner wall of the drum 18 can be cleaned by the arc-shaped scraper 32.

[0022] In this embodiment, the fabric feeding mechanism 6 includes a fabric feeding motor, a rotating rod, and a fabric feeding disc. The rotating rod is fixedly installed at the bottom end of the output shaft of the fabric feeding motor. The fabric feeding motor is tilted and fixedly installed on the top of the upper cover 4. The fabric feeding disc is fixedly installed above the bottom end of the rotating rod, corresponding to the middle position of the drum 18. The bottom end of the feed pipe 7 is fixedly connected to the outer wall of the fabric feeding disc. A cleaning pipe is fixedly installed on one side of the top end of the feed pipe 7. The fabric feeding motor and the rotating rod can drive the fabric feeding disc to rotate, which facilitates the even spraying of the feed material onto the drum 18. It is also convenient to filter the liquid material through the rotation of the drum 18. Water can be supplied to the feed pipe 7, the fabric feeding disc, and the inside of the drum 18 through the cleaning pipe, which is convenient for cleaning the fabric feeding disc and the drum 18.

[0023] When using this explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism, a sealing butterfly valve is installed at the bottom of the discharge cylinder 11, and solenoid valves are installed at the top of the feed pipe 7 and the cleaning pipe. An intake solenoid valve is installed at the outer end of the nitrogen inlet pipe 12. A PLC controller is installed, and the PLC controller, in conjunction with its internal programming, is electrically connected to the pressure sensor 15, oxygen concentration sensor 14, drive motor 19, solenoid valves, intake solenoid valve, and exhaust solenoid valve. The nitrogen inlet pipe 12 is fixedly connected to the nitrogen preparation equipment through a pipeline, and a delivery pump is used to transport nitrogen. The upper cover 4 is driven by the hydraulic rod 10 to load the centrifuge body. After completion, The first fixing plate 8 is pushed by the hydraulic rod 10, which causes the upper cover 4 to rotate and cover the top of the cylinder 3, facilitating the sealing of the top of the cylinder 3. The exhaust solenoid valve on the exhaust pipe 13 and the intake solenoid valve on the nitrogen inlet pipe 12 are opened, and nitrogen is introduced into the nitrogen inlet pipe 12 through the nitrogen preparation equipment and delivery pump. At this time, the L-shaped groove 29 inside the turntable 26 connects the nitrogen inlet pipe 12 with the channel 27. The nitrogen enters the lower outlet through the L-shaped groove 29 and the channel 27 and is discharged into the centrifuge body. The nitrogen enters from the bottom, compressing the lighter air upward and discharging it from the exhaust pipe 13. At the same time, the oxygen concentration sensor 1 is used. 4. Detect the oxygen content inside the centrifuge body. When the oxygen content inside the centrifuge body is continuously below 4% (preset value), the PLC controller determines that the oxygen content inside the centrifuge body is qualified, controls the inlet solenoid valve and the exhaust solenoid valve, and controls the drive motor 19 to drive the drum 18 to rotate, which can centrifuge and filter the material liquid. At the same time, the pressure sensor 15 detects the pressure inside the centrifuge body. When the pressure inside the centrifuge body decreases to the set lower limit, the inlet solenoid valve is opened, and the rotation of the drive motor 19 can drive the first rotating rod 23 to rotate through the pulley and belt transmission mechanism 22. The first rotating rod 23 is driven by the first gear and the second gear. The meshing action of the wheel drives the second rotating rod 24 to rotate at a reduced speed. The second rotating rod 24 drives the turntable 26 and the L-shaped through groove 29 to rotate, and connects the nitrogen inlet pipe 12 with the channel 27, so as to intermittently replenish nitrogen into the centrifuge body to ensure that the centrifuge body is in a slightly positive pressure state. After the pressure rises to the upper limit, it is shut off. This cycle is repeated to maintain a slightly positive pressure throughout the centrifugation process, forming intrinsic safety. In addition, the pressure sensor 15 and the oxygen concentration sensor 14 can monitor the oxygen concentration and pressure inside the centrifuge body in real time, which facilitates solid-liquid separation of flammable and explosive organic solvents, reduces the safety hazards of the centrifuge body, and improves the practicality of the mechanism.The centrifuge body is a PGZ series flat-plate scraper-type fully automatic centrifuge with bottom discharge. The oxygen concentration sensor 14 is an InPro6800G / 12 / 120 / Ka, and the pressure sensor 15 is an MSP-300 pressure transmitter. The PLC controller, drive motor 19, pressure sensor 15, oxygen concentration sensor 14, solenoid valve, inlet solenoid valve, exhaust solenoid valve, sealing butterfly valve, hydraulic rod 10, scraper mechanism 5, and material distribution mechanism 6 are all existing known equipment, and this application will not describe them in detail.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An explosion-proof fully automatic unloading centrifuge with a nitrogen protection mechanism, comprising a centrifuge body and a gas supply mechanism, characterized in that, The centrifuge body includes a base (1), a cylinder (3), a top cover (4), a rotating drum (18), and an adjustment mechanism. The cylinder (3) is fixedly installed on the top of the base (1). The top cover (4) is installed on the top of the cylinder (3) through the adjustment mechanism. From left to right, the top of the top cover (4) is fixedly installed with a scraper mechanism (5), a pressure sensor (15), a feed pipe (7), a cloth feeding mechanism (6), an exhaust pipe (13), and an oxygen concentration sensor (14) fixedly installed inside the top of the exhaust pipe (13). The exhaust pipe (13) is T-shaped, and an exhaust solenoid valve is fixedly installed at one end of the exhaust pipe (13). The gas supply mechanism includes a nitrogen inlet pipe (12), a turntable (26), a channel (27), and a gear set (25). The channel (27) is opened inside one end of the base (1). The nitrogen inlet pipe (12) is fixedly connected to the front side of one end of the base (1) at the position corresponding to the channel (27). The turntable (26) is rotatably installed inside one end of the channel (27). An L-shaped through groove (29) is opened inside the turntable (26). A filter screen (28) is fixedly installed inside the other end of the channel (27). A second rotating rod (24) is fixedly installed inside the bottom of the turntable (26) corresponding to the bottom end of the base (1).

2. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 1, characterized in that: A support cylinder (17) is fixedly installed on the inner side of the cylinder (3) corresponding to the top of the base (1). The inner side of the support cylinder (17) is provided with a lower drain in a circular pattern inside the base (1). A fixed cover (20) is fixedly installed below the lower drain at the bottom of the base (1). A drive motor (19) is fixedly installed inside the fixed cover (20) corresponding to the bottom of the base (1). A drain pipe (16) is fixedly connected to the bottom of one end of the base (1) corresponding to the inner side of the cylinder (3). Support legs (2) are fixedly installed at the four corners of the bottom of the base (1).

3. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 2, characterized in that: The drum (18) is fixedly installed at the top of the output shaft of the drive motor (19) corresponding to the top of the support cylinder (17). The drum (18) is movably disposed inside the cylinder (3). The bottom of the drum (18) has a circularly distributed lower outlet. The bottom of the upper cover (4) is fixedly provided with a rubber ring at the position corresponding to the drum (18). The rubber ring is in close contact with the top of the drum (18).

4. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 3, characterized in that: A discharge cylinder (11) is fixedly installed below the lower discharge port on the outside of the fixed cover (20). An isolation tube (21) is fixedly installed between one end of the fixed cover (20) and the discharge cylinder (11). A horizontal plate is fixedly installed on the outer wall of the discharge cylinder (11). A first rotating rod (23) is rotatably installed between the top of the horizontal plate and the bottom wall of the base (1). A transmission mechanism (22) is installed between the first rotating rod (23) and the output shaft of the drive motor (19). The transmission mechanism (22) includes a pulley and a belt. The pulley is fixedly installed on the drive motor (19) and the first rotating rod (23). The belt is movably installed between the two pulleys and is located inside the isolation tube (21). The channel (27) is fixedly connected to the lower discharge port.

5. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 4, characterized in that: The gear set (25) is disposed between the top end of the first rotating rod (23) and the second rotating rod (24). The gear set (25) includes a first gear and a second gear. The first gear and the second gear are respectively fixedly installed at the top ends of the first rotating rod (23) and the second rotating rod (24). The first gear and the second gear mesh with each other and are arranged in parallel. The bottom end of the second rotating rod (24) is rotatably installed inside the top end of the horizontal plate.

6. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 1, characterized in that: The adjustment mechanism includes a first fixed plate (8), a second fixed plate (9), and a hydraulic rod (10). The first fixed plate (8) is fixedly installed at one end of the upper cover (4). The second fixed plate (9) is symmetrically fixedly installed on both sides of the outer wall of the top of the cylinder (3). The first fixed plate (8) is T-shaped. The bottom end of the first fixed plate (8) is movably installed between the two second fixed plates (9) through a rotating shaft. The hydraulic rod (10) is movably installed between the base (1) and the first fixed plate (8) through a rotating shaft set at its bottom end and output end.

7. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 1, characterized in that: The scraper mechanism (5) includes an electric push rod (30). A crossbar (31) is fixedly installed on one side of the bottom end of the output rod of the electric push rod (30). An arc-shaped scraper (32) is fixedly installed at one end of the crossbar (31). The bottom of the arc-shaped scraper (32) is provided with an inclined surface. The arc-shaped scraper (32) is in close contact with the inner wall of the drum (18).

8. The explosion-proof fully automatic unloading centrifuge with nitrogen protection mechanism according to claim 1, characterized in that: The fabric feeding mechanism (6) includes a fabric feeding motor, a rotating rod and a fabric feeding disc. The rotating rod is fixedly installed at the bottom end of the output shaft of the fabric feeding motor. The fabric feeding motor is tilted and fixedly installed on the top of the upper cover (4). The fabric feeding disc is fixedly installed above the bottom end of the rotating rod corresponding to the middle position of the drum (18). The bottom end of the feed pipe (7) is fixedly connected to the outer wall of the fabric feeding disc. A cleaning pipe is fixedly installed on one side of the top end of the feed pipe (7).

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