A nitrogen-addition explosion-proof safety device for a flat-plate centrifuge

Abstract

This invention relates to the field of flatbed centrifuge technology and discloses a nitrogen-filling explosion-proof safety device for flatbed centrifuges, comprising a housing, a nitrogen-filling device, a blocking device, a pressure-relieving device, and an exhaust device; a cover plate is rotatably connected to the top of the housing, a motor is fixedly connected to the bottom of the housing, an inner cylinder is fixedly connected to the output end of the motor, a nitrogen tank is fixedly connected to the left side of the housing, and a protective box is fixedly connected to the top of the nitrogen tank. When a leak occurs in the centrifuge, the internal air pressure of the centrifuge will decrease. At this time, a spring will push the push plate to the middle of the air inlet in the protective box. At this time, the nitrogen tank can be connected to the inside of the centrifuge through the air inlet, and the nitrogen tank will add nitrogen into the centrifuge, preventing the concentration of explosive gases in the centrifuge from increasing after nitrogen leakage, which could lead to an explosion of the device.

Description

Technical Field

[0001] This invention relates to the field of flatbed centrifuge technology, specifically to a nitrogen-addition explosion-proof safety device for flatbed centrifuges. Background Technology

[0002] Sometimes, flammable and explosive solids or liquids are centrifuged in flatbed centrifuges. Therefore, it is necessary to add sufficient nitrogen gas to the centrifuge for explosion-proof operation.

[0003] Patent application number CN202020950626.X discloses a nitrogen-adding explosion-proof device for a flat centrifuge, including an arc-shaped latch, a first feed inlet, a hinge, an automatic retractable rod, an anti-slip sleeve, an internal tank, and a discharge outlet. The device housing adopts a rectangular structure, with the top of a support frame fixedly connected to the lower end of the housing. One end of the hinge is connected to the upper side of the housing, and the other end of the automatic retractable rod is fixedly connected to a fixed steel plate. The fixed steel plate is fixedly connected to the side wall of the housing, and the other end of the hinge is fixedly connected to the equipment cover. This invention improves the safety characteristics of the equipment by using high-strength materials. The novel design employs a sealed structure in the gap between the internal tank and the equipment shell, injecting inert nitrogen gas to ensure the safety of the internal tank. This invention also significantly improves equipment safety by incorporating a sponge pad. However, while this device prevents leakage and explosion through effective sealing, the sealing structure is prone to aging after prolonged use, leading to a deterioration in sealing performance. If workers do not replace it in time, nitrogen leakage from the centrifuge can easily occur, resulting in a decrease in internal nitrogen and an increase in the concentration of explosive gases, still posing a safety hazard. Therefore, a nitrogen-filling explosion-proof safety device for flat-plate centrifuges is proposed to address the aforementioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a nitrogen-addition explosion-proof safety device for a flat centrifuge, addressing the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a nitrogen addition explosion-proof safety device for a flat centrifuge, comprising a housing, and further comprising a nitrogen addition device, a blocking device, a pressure relief device, and an exhaust device; a cover plate is rotatably connected to the top of the housing, a motor is fixedly connected to the bottom of the housing, an inner cylinder is fixedly connected to the output end of the motor, a nitrogen tank is fixedly connected to the left side of the housing, and a protective box is fixedly connected to the top of the nitrogen tank; the nitrogen addition device includes a moving rod, a push plate, and an air inlet, the moving rod is slidably connected to the inner wall of the left side of the protective box, the push plate is fixedly connected to the right end of the moving rod, and the air inlet is opened on the inner wall of the protective box; the blocking device is disposed on the housing. The pressure relief device is located on the left side of the protective box, and the exhaust device is located on the inner wall of the cover plate. A spring is installed between the left side of the push plate and the inner wall of the protective box, and the spring is sleeved on the surface of the moving rod. The surface of the push plate is in contact with the inner wall of the protective box, and the bottom of the inner cylinder is in contact with the inner wall of the shell. When the centrifuge leaks, the air pressure inside the centrifuge will decrease. At this time, the spring will push the push plate to the middle of the air inlet in the protective box. At this time, the nitrogen tank can be connected to the inside of the centrifuge through the air inlet. The nitrogen tank will add nitrogen into the centrifuge to prevent the concentration of explosive gas in the centrifuge from increasing after the nitrogen leaks, which could lead to an explosion of the device.

[0006] Preferably, the blocking device includes a baffle, a support plate, and a chuck. The baffle is fixedly connected to the inner wall of the housing, the support plate is fixedly connected to the inner wall of the housing, and the chuck is slidably connected to the inner wall of the protective box. The blocking device also includes a fixed plate, a sliding rod, a locking plate, and a pull rope. The fixed plate is fixedly connected to the inner wall of the housing, the sliding rod is slidably connected to the inner wall of the fixed plate, the locking plate is fixedly connected to the end of the sliding rod near the baffle, and the pull rope is fixedly connected to the right side of the chuck. The surface of the pull rope is slidably connected to the inner wall of the support plate, and the left side of the locking plate is in contact with the inner wall of the housing. A spring is provided between the locking plate and the fixed plate, and the spring is sleeved on the surface of the sliding rod. When the centrifuge is in use, the motor drives the inner cylinder to rotate at high speed and perform centrifugation. Some solids centrifuged out are blocked by the baffle, preventing solids from entering the protective box and causing blockage. The nitrogen addition process affects the explosion prevention of the equipment. When nitrogen is first added, the pusher is located in the middle of the air inlet, while the chuck is located on the right side of the air inlet. At this time, nitrogen from the nitrogen tank enters the protective box and moves to the left side of the chuck through the air inlet. The nitrogen is then pressurized by the nitrogen tank and transported through the pressure check valve in the chuck, entering the space between the housing and the baffle. The spring moves the chuck plate and blocks it in the baffle. Since the nitrogen cannot escape from the space between the housing and the baffle, the pressure between the housing and the baffle increases and pushes the chuck to the left. The chuck moves the slide rod through the pull rope, and the slide rod moves the chuck plate, allowing the nitrogen to pass through the baffle and enter the centrifuge. This keeps the chuck plate closed when no nitrogen is added, preventing solids from entering the space between the housing and the baffle through the holes on the top and bottom of the baffle when the centrifuge is centrifuging ordinary substances, thus preventing them from accumulating between the housing and the baffle and being difficult to clean.

[0007] Preferably, the pressure relief device includes an air pipe and an exhaust port. The air pipe is fixedly connected to the left side of the protective box, and the exhaust port is located on the inner wall of the protective box. The right side of the air pipe is connected to the left side of the exhaust port. The pressure relief device also includes a cam, a spiral groove, and a baffle. The cam is movably connected to the surface of a moving rod, the spiral groove is located on the surface of the moving rod, and the baffle is slidably connected to the inner wall of the protective box. The surface of the cam is in contact with the bottom of the baffle. A locking block is provided on the inner wall of the cam, and the locking block is located in the spiral groove. When the surface of the cam is in contact with the inner wall of the protective box, gas will be generated. When the gas is generated, it will cause gas to enter the centrifuge. When the pressure in the centrifuge increases, the gas is blocked by the chuck and moves in the opposite direction from the air inlet to the right side of the push plate, pushing the push plate to the left. The push plate will drive the moving rod to the left. The moving rod will drive the cam, which is limited and cannot move, to rotate through the spiral groove on the surface and the locking block on the inner wall of the cam. When the cam's protrusion rotates to the bottom, the baffle will move down close to the cam under the action of gravity. At this time, the baffle no longer blocks the connection between the exhaust port and the air pipe, and the gas in the centrifuge will be discharged from the exhaust port and the air pipe to prevent the gas pressure in the centrifuge from exceeding the predetermined value, which could easily lead to a safety accident when it is turned on later. The left side of the spiral groove is a straight groove, and the cam will not be driven to rotate through the spiral groove when the moving rod moves to the right.

[0008] Preferably, the exhaust device includes a pipe, a support rod, and a support block. The support rod is fixedly connected to the rear of the cover plate, and the support block is fixedly connected to the rear end of the support rod. The pipe is sleeved on the surface of the support block. The exhaust device also includes a retaining ring, a threaded rod, and a limiting disc. The threaded rod is slidably connected to the inner wall of the support block, the retaining ring is threadedly connected to the surface of the threaded rod, and the limiting disc is fixedly connected to the front end of the threaded rod. The surface of the threaded rod is in contact with the inner wall of the cover plate, and the rear end of the limiting disc is in contact with the front end of the cover plate. A through hole is provided on the surface of the threaded rod, and the surface of the retaining ring is in contact with the surface of the support rod. When the device needs to be opened after use, the retaining ring is rotated first. The retaining ring will drive the threaded rod, which is limited by the support block and can only slide, to move forward through the thread. This causes the threaded rod to move the limiting disc forward. At this time, the through hole on the threaded rod is connected to the inside of the centrifuge. The gas inside the centrifuge will enter the pipe through the through hole in the threaded rod and be discharged and depressurized through the pipe to prevent excessive gas in the centrifuge, which could lead to safety accidents when the cover plate is opened.

[0009] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0010] 1. This nitrogen-filling explosion-proof safety device for a flat-plate centrifuge works by coordinating the housing, cover plate, motor, inner cylinder, nitrogen tank, protective box, moving rod, push plate, and air inlet. When a leak occurs in the centrifuge, the internal gas pressure decreases. At this time, the spring pushes the push plate to the middle of the air inlet in the protective box. The air inlet allows the nitrogen tank to connect with the inside of the centrifuge, and the nitrogen tank will add nitrogen into the centrifuge. This prevents the concentration of explosive gases in the centrifuge from increasing after a nitrogen leak, which could lead to an explosion of the device.

[0011] 2. The nitrogen-filling explosion-proof safety device of this flat centrifuge works by coordinating the baffle, support plate, chuck, fixing plate, slide rod, clamping plate and pull rope. When the centrifuge is in use, the motor drives the inner cylinder to rotate at high speed and perform centrifugation. Some solids that are centrifuged out will be blocked by the baffle to prevent solids from entering the protective box and causing blockage, which would affect the nitrogen-filling explosion-proof device.

[0012] 3. The nitrogen-filling explosion-proof safety device of this flat plate centrifuge works in coordination with the gas pipe, exhaust port, cam, spiral groove, and baffle. When centrifuging volatile solvents, gas is generated, which increases the internal pressure of the centrifuge. The gas in the centrifuge is discharged from the exhaust port and gas pipe to prevent the gas pressure in the centrifuge from exceeding the predetermined value, which could easily lead to a safety accident when it is turned on later. The left side of the spiral groove is a straight groove, and the cam will not be driven to rotate through the spiral groove when the moving rod moves to the right.

[0013] 4. The nitrogen-filling explosion-proof safety device for this flat-plate centrifuge operates through the coordinated operation of pipes, support rods, support blocks, retaining rings, threaded rods, and limiting discs. When the device needs to be opened after use, first rotate the retaining ring. The retaining ring will drive the threaded rod, which is limited by the support block and can only slide forward, through the thread. This causes the threaded rod to move the limiting disc forward. At this time, the through hole on the threaded rod is connected to the inside of the centrifuge. The gas inside the centrifuge will enter the pipe through the through hole in the threaded rod and be discharged and depressurized through the pipe, preventing excessive gas in the centrifuge from causing safety accidents when the cover is opened. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a half-sectional view of the shell structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the nitrogen tank structure of the present invention;

[0017] Figure 4 This is a half-sectional view of the protective box structure of the present invention;

[0018] Figure 5This is a schematic diagram of the tracheal structure of the present invention;

[0019] Figure 6 This is a half-sectional view of the pipeline structure of the present invention;

[0020] Figure 7 This is a half-sectional view of the threaded rod structure of the present invention.

[0021] In the diagram: 1. Shell; 2. Cover plate; 3. Motor; 4. Inner cylinder; 5. Nitrogen tank; 6. Protective box; 61. Moving rod; 62. Push plate; 63. Air inlet; 7. Blocking device; 71. Baffle; 72. Support plate; 73. Chuck; 731. Fixing plate; 732. Slide rod; 733. Clamping plate; 734. Pull rope; 8. Pressure relief device; 81. Air pipe; 82. Exhaust port; 821. Cam; 822. Spiral groove; 823. Baffle; 9. Exhaust device; 91. Pipe; 92. Support rod; 93. Support block; 931. Snap ring; 932. Threaded rod; 933. Limiting plate. Detailed Implementation

[0022] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-4One embodiment of the present invention is as follows: a nitrogen addition explosion-proof safety device for a flat centrifuge, comprising a housing 1, a nitrogen addition device, a blocking device 7, a pressure relief device 8, and an exhaust device 9; a cover plate 2 is rotatably connected to the top of the housing 1, a motor 3 is fixedly connected to the bottom of the housing 1, an inner cylinder 4 is fixedly connected to the output end of the motor 3, a nitrogen tank 5 is fixedly connected to the left side of the housing 1, and a protective box 6 is fixedly connected to the top of the nitrogen tank 5; the nitrogen addition device includes a moving rod 61, a push plate 62, and an air inlet 63, the moving rod 61 is slidably connected to the inner wall of the left side of the protective box 6, the push plate 62 is fixedly connected to the right end of the moving rod 61, and the air inlet 63 is opened on the inner wall of the protective box 6; the blocking device 7 is disposed on the inner wall of the housing 1, and the pressure relief device 8 is disposed on the inner wall of the housing 1. On the left side of the protective box 6, the exhaust device 9 is located on the inner wall of the cover plate 2. When the centrifuge leaks, the air pressure inside the centrifuge will decrease. At this time, the spring will push the push plate 62 to move to the middle of the air inlet 63 in the protective box 6. A spring is provided between the left side of the push plate 62 and the inner wall of the protective box 6, and the spring is sleeved on the surface of the moving rod 61. The surface of the push plate 62 is in contact with the inner wall of the protective box 6, and the bottom of the inner cylinder 4 is in contact with the inner wall of the shell 1. When the push plate 62 moves to the middle of the air inlet 63, the air inlet 63 can connect the nitrogen tank 5 with the inside of the centrifuge. The nitrogen tank 5 will add nitrogen into the centrifuge to prevent the concentration of explosive gas in the centrifuge from increasing after the nitrogen leaks, which could lead to an explosion of the device.

[0024] The blocking device 7 includes a baffle 71, a support plate 72, and a chuck 73. The baffle 71 is fixedly connected to the inner wall of the housing 1, the support plate 72 is fixedly connected to the inner wall of the housing 1, and the chuck 73 is slidably connected to the inner wall of the protective box 6. When the centrifuge is in use, the motor 3 drives the inner cylinder 4 to rotate at high speed and perform centrifugation. Some solids centrifuged out will be blocked by the baffle 71 to prevent solids from entering the protective box 6 and causing blockage, which would affect the nitrogen addition and explosion prevention of the device. The blocking device 7 also includes a fixing plate 731 and a sliding rod 7. 32. A clamping plate 733 and a pull rope 734 are provided. A fixing plate 731 is fixedly connected to the inner wall of the housing 1. A sliding rod 732 is slidably connected to the inner wall of the fixing plate 731. The clamping plate 733 is fixedly connected to one end of the sliding rod 732 near the cover 71. The pull rope 734 is fixedly connected to the right side of the chuck 73. The surface of the pull rope 734 is slidably connected to the inner wall of the support plate 72. The left side of the clamping plate 733 is in contact with the inner wall of the housing 1. A spring is provided between the clamping plate 733 and the fixing plate 731, and the spring is sleeved on the sliding rod 732. On the surface, when the device is first added to nitrogen, the pusher 62 is located in the middle of the air inlet 63, while the chuck 73 is located to the right of the air inlet 63. At this time, nitrogen from the nitrogen tank 5 will enter the protective box 6, and the nitrogen will move to the left side of the chuck 73 through the air inlet 63. The nitrogen can be delivered by pressurizing the nitrogen tank 5 and enters the space between the housing 1 and the baffle 71 through the pressure check valve in the chuck 73. The spring will drive the chuck 733 to move and block it in the baffle 71, and the nitrogen cannot be discharged between the housing 1 and the baffle 71. At this time, the pressure between the housing 1 and the baffle 71 increases and pushes the chuck 73 to the left. The chuck 73 will pull the slide bar 732 to move through the pull rope 734. The slide bar 732 will drive the chuck plate 733 to move, so that nitrogen can pass through the baffle 71 and enter the centrifuge. This keeps the chuck plate 733 in a closed state when no nitrogen is added, preventing solids from entering between the housing 1 and the baffle 71 through the holes on the top and bottom of the baffle 71 when the centrifuge is centrifuging ordinary substances, and thus accumulating between the housing 1 and the baffle 71 and being difficult to clean.

[0025] The working principle is as follows: when a centrifuge leaks, the air pressure inside the centrifuge will decrease. At this time, the spring will push the push plate 62 to move to the middle of the air inlet 63 in the protective box 6. At this time, the nitrogen tank 5 can be connected to the inside of the centrifuge through the air inlet 63. The nitrogen tank 5 will add nitrogen into the centrifuge to prevent the concentration of explosive gas in the centrifuge from increasing after the nitrogen leak, which could lead to an explosion of the device.

[0026] When the centrifuge is in use, motor 3 drives the inner cylinder 4 to rotate at high speed and perform centrifugation. Some solids discharged from the centrifuge are blocked by baffle 71 to prevent them from entering the protective box 6 and causing blockage, which would affect the nitrogen addition and explosion prevention of the device. When the device is first added to nitrogen, push plate 62 is located in the middle of air inlet 63, and chuck 73 is located to the right of air inlet 63. At this time, nitrogen from nitrogen tank 5 enters the protective box 6 and moves to the left side of chuck 73 through air inlet 63. The nitrogen is then pressurized by nitrogen tank 5 and transported through the pressure check valve in chuck 73 into the space between housing 1 and baffle 71. The spring will... The chuck 733 moves and is blocked in the baffle 71. Nitrogen gas enters between the housing 1 and the baffle 71 and cannot be discharged. At this time, the pressure between the housing 1 and the baffle 71 increases and pushes the chuck 73 to the left. The chuck 73 will pull the slide bar 732 through the pull rope 734. The slide bar 732 will drive the chuck 733 to move, so that nitrogen gas can pass through the baffle 71 and enter the centrifuge. This keeps the chuck 733 in a closed state when no nitrogen is added, preventing solids from entering between the housing 1 and the baffle 71 through the holes on the top and bottom of the baffle 71 when the centrifuge is centrifuging ordinary substances, and thus accumulating between the housing 1 and the baffle 71 and being difficult to clean.

[0027] Please see Figure 5-7Based on the above embodiments, in another embodiment of the present invention, the pressure relief device 8 includes an air pipe 81 and an exhaust port 82. The air pipe 81 is fixedly connected to the left side of the protective box 6, and the exhaust port 82 is opened on the inner wall of the protective box 6. The right side of the air pipe 81 and the left side of the exhaust port 82 are interconnected. When centrifuging volatile solvents, gas is generated. When the gas is generated, it will cause the pressure inside the centrifuge to increase. When the pressure inside the centrifuge increases, the gas will be blocked by the chuck 73 and move in the opposite direction from the air inlet 63 to the right side of the push plate 62, pushing the push plate 62 to the left. The push plate 62 will drive the moving rod 61 to the left. The moving rod 61 will drive the cam 821, which is limited and cannot move, to rotate through the spiral groove 822 on the surface and the locking block on the inner wall of the cam 821. The pressure relief device 8 also includes a cam 821, a spiral groove 822 and a baffle 823. The cam 821 is movable. A spiral groove 822 is formed on the surface of the moving rod 61, and a baffle 823 is slidably connected to the inner wall of the protective box 6. The surface of the cam 821 is in contact with the bottom of the baffle 823. A locking block is provided on the inner wall of the cam 821, and the locking block is located in the spiral groove 822. When the protrusion of the cam 821 rotates to the bottom, the baffle 823 will move down close to the cam 821 under the action of gravity. At this time, the baffle 823 no longer blocks the connection between the exhaust port 82 and the air pipe 81, and the gas in the centrifuge will be discharged from the exhaust port 82 and the air pipe 81 to prevent the gas pressure in the centrifuge from exceeding the predetermined value, which could easily lead to a safety accident when it is turned on later. The left side of the spiral groove 822 is a straight groove, and the cam 821 will not be rotated through the spiral groove 822 when the moving rod 61 moves to the right.

[0028] The exhaust device 9 includes a pipe 91, a support rod 92, and a support block 93. The support rod 92 is fixedly connected to the rear of the cover plate 2, and the support block 93 is fixedly connected to the rear end of the support rod 92. The pipe 91 is sleeved on the surface of the support block 93. When the device needs to be opened after use, the retaining ring 931 is rotated first. The retaining ring 931 will drive the threaded rod 932, which is limited by the support block 93 and can only slide, to move forward through the thread, so that the threaded rod 932 drives the limiting plate 933 to move forward. The exhaust device 9 also includes a retaining ring 931, a threaded rod 932, and a limiting plate 933. The threaded rod 932 is slidably connected to the inner wall of the support block 93, and the retaining ring 931 is threadedly connected to the inner wall of the support block 93. A limiting disc 933 is fixedly connected to the front end of the threaded rod 932. The surface of the threaded rod 932 is in contact with the inner wall of the cover plate 2, and the rear part of the limiting disc 933 is in contact with the front part of the cover plate 2. A through hole is opened on the surface of the threaded rod 932, and the surface of the retaining ring 931 is in contact with the surface of the support rod 92. When the threaded rod 932 moves forward, the through hole on the threaded rod 932 communicates with the inside of the centrifuge. The gas inside the centrifuge will enter the pipe 91 through the through hole in the threaded rod 932 and be discharged and depressurized through the pipe 91 to prevent the centrifuge from having too much gas, which could lead to some safety accidents when the cover plate 2 is opened.

[0029] The working principle is as follows: During the centrifugation of volatile solvents, gas is generated, which increases the internal pressure of the centrifuge. When the internal pressure of the centrifuge increases, the gas is blocked by the chuck 73 and moves in the opposite direction from the air inlet 63 to the right side of the push plate 62, pushing the push plate 62 to the left. The push plate 62 drives the moving rod 61 to the left. The moving rod 61 drives the cam 821, which is limited and cannot move, to rotate through the spiral groove 822 on its surface and the locking block on the inner wall of the cam 821. When the protrusion of the cam 821 rotates to the bottom, the baffle 823 will move down close to the cam 821 under the action of gravity. At this time, the baffle 823 no longer blocks the connection between the exhaust port 82 and the air pipe 81, and the gas in the centrifuge will be discharged from the exhaust port 82 and the air pipe 81, preventing the gas pressure in the centrifuge from exceeding the predetermined value, which could easily lead to a safety accident when it is turned on later. The left side of the spiral groove 822 is a straight groove, and the cam 821 will not be driven to rotate through the spiral groove 822 when the moving rod 61 moves to the right.

[0030] When the device needs to be opened after use, first rotate the retaining ring 931. The retaining ring 931 will drive the threaded rod 932, which is limited by the support block 93 and can only slide, to move forward through the thread. This causes the threaded rod 932 to move the limiting plate 933 forward. At this time, the through hole on the threaded rod 932 is connected to the inside of the centrifuge. The gas inside the centrifuge will enter the pipe 91 through the through hole in the threaded rod 932 and be discharged and depressurized through the pipe 91 to prevent excessive gas in the centrifuge from causing safety accidents when the cover plate 2 is opened.

[0031] This invention provides a nitrogen-addition explosion-proof safety device for a flat-plate centrifuge. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A nitrogen-addition explosion-proof safety device for a flat-plate centrifuge, comprising a housing (1), characterized in that: It also includes a nitrogen supply device, a blocking device (7), a pressure relief device (8), and an exhaust device (9). The top of the housing (1) is rotatably connected to a cover plate (2), the bottom of the housing (1) is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to an inner cylinder (4), the left side of the housing (1) is fixedly connected to a nitrogen tank (5), and the top of the nitrogen tank (5) is fixedly connected to a protective box (6). The nitrogen addition device includes a moving rod (61), a push plate (62), and an air inlet (63). The moving rod (61) is slidably connected to the inner wall on the left side of the protective box (6). The push plate (62) is fixedly connected to the right end of the moving rod (61). The air inlet (63) is opened on the inner wall of the protective box (6). The blocking device (7) is located on the inner wall of the housing (1), the pressure relief device (8) is located on the left side of the protective box (6), and the exhaust device (9) is located on the inner wall of the cover plate (2). The blocking device (7) includes a baffle (71), a support plate (72) and a chuck (73). The baffle (71) is fixedly connected to the inner wall of the housing (1), the support plate (72) is fixedly connected to the inner wall of the housing (1), and the chuck (73) is slidably connected to the inner wall of the protective box (6). The blocking device (7) further includes a fixing plate (731), a sliding rod (732), a clamping plate (733), and a pull rope (734). The fixing plate (731) is fixedly connected to the inner wall of the housing (1). The sliding rod (732) is slidably connected to the inner wall of the fixing plate (731). The clamping plate (733) is fixedly connected to one end of the sliding rod (732) near the cover (71). The pull rope (734) is fixedly connected to the right side of the chuck (73).

2. The nitrogen-addition explosion-proof safety device for a flat-plate centrifuge according to claim 1, characterized in that: A spring is provided between the left side of the push plate (62) and the inner wall of the protective box (6), and the spring is sleeved on the surface of the moving rod (61). The surface of the push plate (62) is in contact with the inner wall of the protective box (6), and the bottom of the inner cylinder (4) is in contact with the inner wall of the shell (1).

3. The nitrogen explosion-proof safety device for a flat-plate centrifuge according to claim 2, characterized in that: The surface of the pull rope (734) is slidably connected to the inner wall of the support plate (72), the left side of the clamping plate (733) is in contact with the inner wall of the housing (1), a spring is provided between the clamping plate (733) and the fixing plate (731), and the spring is sleeved on the surface of the slide rod (732).

4. The nitrogen-addition explosion-proof safety device for a flat-plate centrifuge according to claim 3, characterized in that: The pressure relief device (8) includes an air pipe (81) and an exhaust port (82). The air pipe (81) is fixedly connected to the left side of the protective box (6), and the exhaust port (82) is opened on the inner wall of the protective box (6). The right side of the air pipe (81) and the left side of the exhaust port (82) are connected to each other.

5. The nitrogen-addition explosion-proof safety device for a flat-plate centrifuge according to claim 4, characterized in that: The pressure relief device (8) also includes a cam (821), a spiral groove (822) and a baffle (823). The cam (821) is movably connected to the surface of the moving rod (61), the spiral groove (822) is opened on the surface of the moving rod (61), and the baffle (823) is slidably connected to the inner wall of the protective box (6).

6. The nitrogen-addition explosion-proof safety device for a flat-plate centrifuge according to claim 5, characterized in that: The surface of the cam (821) is in contact with the bottom of the baffle (823), the inner wall of the cam (821) is provided with a locking block, and the locking block is located in the spiral groove (822). The surface of the cam (821) is in contact with the inner wall of the protective box (6).

7. The nitrogen explosion-proof safety device for a flat-plate centrifuge according to claim 6, characterized in that: The exhaust device (9) includes a pipe (91), a support rod (92) and a support block (93). The support rod (92) is fixedly connected to the rear of the cover plate (2), and the support block (93) is fixedly connected to the rear end of the support rod (92). The pipe (91) is sleeved on the surface of the support block (93).

8. The nitrogen-addition explosion-proof safety device for a flat-plate centrifuge according to claim 7, characterized in that: The exhaust device (9) also includes a retaining ring (931), a threaded rod (932), and a limiting plate (933). The threaded rod (932) is slidably connected to the inner wall of the support block (93). The retaining ring (931) is threadedly connected to the surface of the threaded rod (932). The limiting plate (933) is fixedly connected to the front end of the threaded rod (932). The surface of the threaded rod (932) is in contact with the inner wall of the cover plate (2). The rear part of the limiting plate (933) is in contact with the front part of the cover plate (2). The surface of the threaded rod (932) has a through hole. The surface of the retaining ring (931) is in contact with the surface of the support rod (92).

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