Abnormity early warning device for N-vinyl pyrrolidone production

Abstract

The utility model discloses an abnormity early warning device for N-vinylpyrrolidone production, which is used for ensuring the safety of an N-vinylpyrrolidone gasifier consisting of a rotating device, a material changing device and a plurality of independent gasification tanks, and is characterized in that the rotating device drives the independent gasification tanks to rotate; the material changing device injects N-vinylpyrrolidone into an independent gasification tank and extracts N-vinylpyrrolidone gas, and comprises two splicing covers, an N-vinylpyrrolidone gas detection assembly and a magnetic control opening and closing assembly, each splicing cover comprises a cover plate and a semi-ring enclosure bulkhead, the inner diameter of each semi-ring enclosure bulkhead is larger than the outer diameter of the independent gasification tank, and the outer diameter of each independent gasification tank is larger than the outer diameter of the magnetic control opening and closing assembly. The N-vinylpyrrolidone gas detection assembly comprises a detection head and a PLC, the detection head is embedded in the cover plate, the magnetic control opening and closing assembly can automatically detect the position of the independent gasification tank and open and close the independent gasification tank, air exhaust and filling of the independent gasification tank are not affected, and monitoring and early warning can be conducted in the gasification process of the independent gasification tank.

Description

Technical Field

[0001] The utility model relates to the technical field of N-vinyl pyrrolidone production, in particular to an abnormality early warning device for N-vinyl pyrrolidone production. Background Art

[0002] N-vinyl pyrrolidone is a colorless or light yellow transparent liquid with a slight odor at room temperature. It is easily soluble in water and many other organic solvents. N-vinyl pyrrolidone is widely used because it can increase the various physical and chemical properties of products. In radiation medicine, wooden flooring industry, paper or cardboard industry, packaging materials, and screen ink industry, the physical properties of products are improved by using N-vinyl pyrrolidone. The production of N-vinyl pyrrolidone includes the steps of preparing catalysts, primary vinylation reaction, secondary vinylation reaction, gasification, flash evaporation, evaporation separation, and light separation. In the gasification step, the N-vinyl pyrrolidone generated in the secondary vinylation reaction step needs to be pushed to the vaporizer for gasification, and the gasification outlet temperature is controlled at 190-210°C.

[0003] Existing N-vinyl pyrrolidone gasification devices mainly include immersed spiral coil gasifiers, sleeve gasifiers and shell and tube gasifiers. These gasifiers continuously guide N-vinyl pyrrolidone into the coils, sleeves and tube shells of the gasifiers, and then continuously inject heat exchange medium, such as warm water or steam, into the outside of the tube where the N-vinyl pyrrolidone is stored, so as to heat and gasify the N-vinyl pyrrolidone and finally discharge it. Some N-vinyl pyrrolidone gasification devices will divide the N-vinyl pyrrolidone into a sealed tank that is constantly circulating and moving for heating and gasification. This method has high requirements for the sealing of the sealed tank. Once the sealed tank leaks, a corresponding early warning device is required to detect and warn in time to prevent disasters. Utility Model Content

[0004] In order to solve the problems mentioned in the above background technology, the utility model provides an abnormality warning device for N-vinyl pyrrolidone production.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An abnormal warning device for N-vinyl pyrrolidone production is used to ensure the safety of an N-vinyl pyrrolidone vaporizer composed of a rotation device, a material changing device and a plurality of independent gasification tanks. The rotation device drives the independent gasification tanks to rotate, and the material changing device injects N-vinyl pyrrolidone into the independent gasification tanks and extracts the N-vinyl pyrrolidone gas. The device comprises two spliced ​​covers, an N-vinyl pyrrolidone gas detection component and a magnetic control opening and closing component. The spliced ​​cover comprises a cover plate and a semi-annular surrounding wall, the inner diameter of the semi-annular surrounding wall is larger than the outer diameter of the independent gasification tank, and the N-vinyl pyrrolidone gas detection component comprises a detection head and a PLC controller, and the detection head is embedded and installed in the cover plate.

[0007] The magnetically controlled opening and closing assembly comprises a distance meter, an electromagnetic block and a current controller. The distance meter is installed on the top of the cover plate, and the electromagnetic block is electrically connected to the current controller.

[0008] Preferably, a guide assembly is installed between the outer wall of the independent gasification tank and the inner wall of the semi-annular surrounding wall, and the guide assembly includes a movable connecting head and a positioning rail. The movable connecting head can be slidably arranged in the positioning rail and cannot be separated from the positioning rail.

[0009] Preferably, one end of the movable connector can extend from the positioning rail, the end of the movable connector extending from the positioning rail is connected to the inner wall of the semi-annular wall, and the end of the positioning rail away from the semi-annular wall is connected to the outer wall of the independent gasification tank.

[0010] Preferably, two pairs of electromagnetic blocks and current controllers are provided, which are respectively installed in two cover plates, and the current controllers are electrically connected to the PLC controller.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The magnetically controlled opening and closing component of the utility model can automatically detect the position of the independent gasification tank and perform corresponding opening and closing actions without affecting the vacuuming and filling of the independent gasification tank. It can also cover the upper end opening of the independent gasification tank during the gasification process of the independent gasification tank to perform monitoring and early warning. It has a high degree of coordination with the N-vinyl pyrrolidone gasifier and has a good monitoring and early warning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of an abnormal warning device for N-vinyl pyrrolidone production according to the utility model;

[0015] Figure 2 This is a top view of the abnormal warning device for N-vinyl pyrrolidone production described in the utility model after the covering top seat is removed;

[0016] Figure 3 This is a three-dimensional cross-sectional view of the upper part of the independent gasification tank described in the utility model;

[0017] Figure 4 It is a side sectional view of the upper part of the independent gasification tank described in the utility model;

[0018] Figure 5 for Figure 4 The enlarged structural diagram at A in the middle;

[0019] Figure 6 This is a schematic diagram of the structure of the material changing head described in the utility model;

[0020] Figure 7 It is a side sectional view of the material changing head described in the utility model;

[0021] Figure 8 It is a side sectional view of the abnormality warning device described in the utility model;

[0022] Fig. 9 It is a side sectional view of the safety mechanism described in the utility model;

[0023] Fig.10 for Fig. 9 Schematic diagram of the structure at point B in the middle.

[0024] In the figure: 1. Rotary device; 101. Heating pool; 1011. Guide slope; 102. Guide rail; 103. Support groove; 11. Base platform; 12. Rotary seat; 13. Rotary belt; 131. Rotary chain; 132. Belt transfer sleeve; 133. Connecting arm; 134. Guide column; 14. Cover top seat; 15. Driving member; 2. Material changing device; 21. Fixed beam; 22. Material changing head; 221. Docking cover; 2211. Flat cover; 2212. Cover ring; 2213. Air seal ring; 222. Liquid injection head; 223 , vacuum head; 224, rotating seat; 225, lifting device; 2251, lifting arm; 2252, lifting head; 23, telescopic member; 3, independent gasification tank; 301, gasification chamber; 302, access chamber; 303, placement shoulder; 304, material exchange chamber; 305, connecting port; 31, main tank body; 32, sealing plug; 3201, limit chamber; 3202, limit socket; 3203, docking chamber; 3204, insertion port; 3205, force shoulder; 321, main plug; 322, adjustment sheet; 323, moving block; 32 4. Airtight gasket; 325. Spring plate; 326. Return spring; 33. Inner partition; 4. Sealed shell; 5. Abnormal warning device; 51. Splicing cover; 511. Cover plate; 512. Semi-circular wall; 52. N-vinyl pyrrolidone gas detection component; 521. Detection head; 522. PLC controller; 53. Magnetron opening and closing component; 531. Distance meter; 532. Electromagnetic block; 533. Current controller; 54. Guide component; 541. Mobile connector; 542. Positioning rail; 6. Safety mechanism; 601. Temporary Storage chamber; 602, sealing groove; 603, corresponding groove; 604, removal outlet; 61, supporting assembly; 611, telescopic rod; 612, supporting cover; 613, magnetic block; 614, docking piece; 62, sealing assembly; 621, receiving tank; 622, sealing cover; 623, permanent magnet piece; 624, heating wire; 625, sealing wax; 626, connecting piece; 63, output assembly; 631, guide bin; 632, placement bin; 633, belt shifter; 6331, motor; 6332, screw; 6333, outer sleeve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1-10An abnormal warning device for N-vinyl pyrrolidone production includes a rotating device 1, a material changing device 2 and an independent gasification tank 3. The rotating device 1 can drive the independent gasification tank 3 to rotate and move, so that the N-vinyl pyrrolidone stored in the independent gasification tank 3 is heated and gasified when passing through a heating pool 101 provided in the rotating device 1. The material changing device 2 is provided in the rotating device 1 to extract the N-vinyl pyrrolidone gas in the independent gasification tank 3 and inject new N-vinyl pyrrolidone to be gasified.

[0027] Reference Figure 1 The N-vinyl pyrrolidone vaporizer is also provided with a sealing shell 4 outside to seal and protect the N-vinyl pyrrolidone vaporizer. In order to enable technicians to better understand this solution, Figure 1 The sealing shell 4 is not fully shown.

[0028] The rotating device 1 includes a base platform 11, a rotating seat 12, a rotating belt 13 and a covering top seat 14. The rotating seat 12 is fixedly installed on the upper surface of the base platform 11. The horizontal profile of the outer peripheral surface of the base platform 11 is larger than the rotating seat 12, so that the upper surface of the base platform 11 forms a circle of platform on the periphery of the rotating seat 12 for placing the independent gasification tank 3.

[0029] At least two driving members 15 are symmetrically mounted on the rotary seat 12, and the driving members 15 can be driven by external force to perform axial rotation. The rotary belt 13 includes a rotary chain 131 and a plurality of belt transfer sleeves 132, and the belt transfer sleeves 132 are evenly distributed and mounted on the outer surface of the rotary chain 131 to move horizontally with the rotation of the rotary chain 131. The rotary chain 131 is supported and tightened by the two driving members 15, and the driving member 15 cooperates with the rotary chain 131 in a manner that the rotary chain 131 can be driven to rotate cyclically. The driving member 15 can be connected to a power device such as an electric motor to be driven to perform axial rotation, thereby driving the rotary belt 13 to perform cyclic rotation.

[0030] The belt transfer sleeve 132 is connected to the rotating chain 131 through a connecting arm 133. Preferably, guide columns 134 are vertically installed on the upper and lower surfaces of the connecting arm 133. The upper surface of the rotating seat 12 and the lower surface of the covering top seat 14 have a guide rail 102. The guide column 134 can be horizontally slidably inserted into the guide rail 102, so that the rotating belt 13 can be rotated along the trajectory of the guide rail 102 under the drive of the driving member 15.

[0031] The independent gasification tank 3 is arranged in each belt transfer sleeve 132, so that it moves horizontally with the rotation of the rotating belt 13. The belt transfer sleeve 132 extends to the outside of the rotating seat 12 but does not exceed the periphery of the base platform 11. The independent gasification tank 3 arranged in the belt transfer sleeve 132 can be placed on the upper surface of the base platform 11 and move horizontally.

[0032] The heating pool 101 is connected to the upper surface of the base platform 11, so that the independent vaporization tank 3 moving on the upper surface of the base platform 11 falls into the heating pool 101 after moving above the heating pool 101. The heating pool 101 is connected to an external circulating heating system, and a heating liquid with a constant temperature is continuously stored inside. After the independent vaporization tank 3 falls into the heating pool 101, the N-vinylpyrrolidone stored in the independent vaporization tank 3 will exchange heat with the heating liquid and be vaporized.

[0033] The length of the independent gasification tank 3 is greater than the distance from the bottom of the transfer tube sleeve 132 to the bottom of the heating pool 101, so that after the independent gasification tank 3 sinks to the bottom of the heating pool 101, it can still be moved by the transfer tube sleeve 132. The heating pool 101 has a guide slope 1011 on at least one side, and the guide slope 1011 is inclined upward from the bottom of the heating pool 101 to the upper surface of the base 11, so as to guide the independent gasification tank 3 to be smoothly moved out of the heating pool 101.

[0034] The refueling device 2 is installed on the covering top seat 14. Before the independent gasification tank 3 enters the heating pool 101, the refueling device 2 will first inject N-vinyl pyrrolidone into the independent gasification tank 3. The refueling device 2 includes a fixed beam 21 and a plurality of refueling heads 22. The fixed beam 21 is fixedly installed on the covering top seat 14. The refueling heads 22 are arranged at positions corresponding to the independent gasification tanks 3 on the upper surface of the base platform 11. The refueling heads 22 are connected to the fixed beam 21 through a telescopic member 23. The telescopic member 23 can drive the refueling heads 22 to move vertically. The driving member 15 can remain stationary after moving part of the independent gasification tank 3 to the position corresponding to the refueling head 22. At this time, the telescopic member 23 can be extended to make the refueling head 22 dock with the upper end of the independent gasification tank 3, so as to extract the N-vinyl pyrrolidone that has been vaporized in the independent gasification tank 3 and enter and exit new N-vinyl pyrrolidone to be vaporized.

[0035] Specifically, the independent vaporization tank 3 includes a main tank body 31 and a sealing plug 32. The main tank body 31 has a vaporization chamber 301 for containing N-vinyl pyrrolidone. The main tank body 31 is made of heat-conducting material and can withstand at least one atmosphere of pressure, so that the main tank body 31 can contain N-vinyl pyrrolidone under the vacuum condition of the vaporization chamber 301, and make N-vinyl pyrrolidone quickly exchange heat with the heat exchange liquid in the heating pool 101 and vaporize.

[0036] The main tank body 31 has an access cavity 302 on the top, and the sealing plug 32 is vertically movably arranged in the access cavity 302. The gasification cavity 301 is upwardly connected with the access cavity 302. The diameter of the connection point between the gasification cavity 301 and the access cavity 302 is smaller than the diameter of the access cavity 302, so as to form a placement shoulder 303 at the bottom of the access cavity 302, and the sealing plug 32 can be placed on the placement shoulder 303.

[0037] The access chamber 302 is provided with a material changing chamber 304 at its periphery. The access chamber 302 and the upper ends of the material changing chamber 304 are both connected to the outside of the independent gasification tank 3. An inner partition wall 33 is provided between the material changing chamber 304 and the access chamber 302. The inner partition wall 33 has a connecting port 305 connecting the access chamber 302 and the material changing chamber 304.

[0038] The sealing plug 32 includes a main plug 321, an adjustment plate 322, a movable block 323 and an airtight gasket 324. The airtight gasket 324 is installed on the bottom surface of the main plug 321. When the main plug 321 is pressed down on the placement shoulder 303, the airtight gasket 324 can press and seal the connection between the gasification chamber 301 and the access chamber 302 to ensure the airtightness in the gasification chamber 301 and prevent N-vinyl pyrrolidone from overflowing from the gasification chamber 301 after gasification.

[0039] The main plug 321 has a limiting cavity 3201 therein, and the adjustment piece 322 is disposed in the limiting cavity 3201 . The limiting cavity 3201 limits the position adjustment of the adjustment piece 322 , so that the adjustment piece 322 can only move vertically in the limiting cavity 3201 , but cannot move horizontally or rotate.

[0040] The movable card block 323 is symmetrically arranged on the outside of the adjustment plate 322. The movable card block 323 can move away from the adjustment plate 322 and protrude horizontally from the limit cavity 3201. The inner partition wall 33 has a limit socket 3202 that allows the protruding movable card block 323 to be inserted. The limit socket 3202 is in a position where the movable card block 323 can be inserted after the main plug 321 is set on the placement shoulder 303 and pressed down. The movable card block 323 can lock the vertical position of the sealing plug 32 when inserted into the limit socket 3202, thereby ensuring that the sealing plug 32 is always pressed tightly against the placement shoulder 303, thereby ensuring the airtightness of the gasification cavity 301.

[0041] A spring retaining plate 325 is arranged on the periphery of the movable block 323, and a return spring 326 is arranged around the movable block 323. The two ends of the return spring 326 respectively resist against the spring retaining plate 325 and the side wall of the limiting cavity 3201. When the return spring 326 is at a normal length, the movable block 323 is pushed toward the adjustment plate 322.

[0042] The movable block 323 has a surface inclined from top to bottom toward the adjusting piece 322 on one side facing the adjusting piece 322. When the adjusting piece 322 is at the lowest point in the limiting cavity 3201, the lower end of the inclined surface of the movable block 323 abuts against the side of the adjusting piece 322. At this time, the adjusting piece 322 pushes the movable block 323 out of the limiting cavity 3201 and inserts it into the limiting socket 3202. At this time, the return spring 326 is in a compressed state. After the adjusting piece 322 moves upward, the movable block 323 disengages from the side of the adjusting piece 322, and the return spring 326 pushes the movable block 323 to retract into the limiting cavity 3201 and disengage from the limiting socket 3202. When the adjusting piece 322 drops to the lowest point of the limiting cavity 3201 again, the adjusting piece 322 can use the inclined surface of the movable block 323 to push the movable block 323 out of the limiting cavity 3201 again.

[0043] The adjustment piece 322 has a docking cavity 3203 , which is connected to the limiting cavity 3201 through an insertion port 3204 , and the limiting cavity 3201 is connected upward to the outside of the main plug 321 .

[0044] The refueling head 22 includes a docking cover 221, a liquid injection head 222, a vacuum head 223, a rotating seat 224 and a lifting device 225. The docking cover 221 includes a flat cover 2211 and a cover ring 2212. The upper end of the cover ring 2212 is fixedly installed on the bottom surface of the flat cover 2211. The lower part of the cover ring 2212 is provided with an airtight ring 2213, and the airtight ring 2213 can completely cover the upper end opening of the refueling cavity 304. After the refueling head 22 moves to the top of the independent gasification tank 3, the telescopic member 23 can press the refueling head 22 downward so that the airtight ring 2213 can close the refueling cavity 304. Since the upper end of the cover ring 2212 is closed by the flat cover 2211, when the refueling head 22 is pressed against the independent gasification tank 3, the access cavity 302, the refueling cavity 304 and the space inside the refueling head 22 will be blocked from the external environment.

[0045] The liquid injection head 222 and the air extraction head 223 vertically penetrate the flat cover 2211 and the cover ring 2212 respectively. After the material changing head 22 is pressed tightly against the independent gasification tank 3, the lower ends of the liquid injection head 222 and the air extraction head 223 will be inserted into the material changing cavity 304. The liquid injection head 222 and the air extraction head 223 are connected to the external N-vinyl pyrrolidone supply system and the N-vinyl pyrrolidone gas extraction system respectively. When one of the N-vinyl pyrrolidone supply system and the N-vinyl pyrrolidone gas extraction system is working, the other system is in a stopped state.

[0046] The rotating seat 224 is installed on the bottom surface of the flat cover 2211, and the lifting device 225 is installed at the lower end of the rotating seat 224. The rotating seat 224 can drive the lifting device 225 to rotate axially. The lifting device 225 includes a retractable lifting arm 2251 and a lifting head 2252 installed at the lower end of the lifting arm 2251. After the refueling head 22 is pressed against the independent gasification tank 3, the lifting arm 2251 can be extended to allow the lifting head 2252 to extend into the docking cavity 3203 through the insertion port 3204. The insertion port 3204 and the docking cavity 3203 form a stress shoulder 3205 at the top of the docking cavity 3203 due to their different shapes. After the lifting head 2252 extends into the docking cavity 3203, the rotating seat 224 can drive the lifting device 225 to rotate at a suitable angle so that the lifting head 2252 rotates to the stress shoulder 3205. 205, at this time, the lifting arm 2251 is shortened and the lifting device 225 uses the lifting head 2252 to pull up the entire adjustment piece 322. After the adjustment piece 322 is pulled up, the moving block 323 disengages from the limiting socket 3202 to release the position lock of the sealing plug 32 in the vertical direction. The top of the limiting cavity 3201 has a limiting top that prevents the adjustment piece 322 from escaping, so that the lifting arm 2251 can continue to pull up and lift the entire sealing plug 32 after pulling the adjustment piece 322 to the top of the limiting cavity 3201, thereby allowing the N-vinyl pyrrolidone gas vaporized from N-vinyl pyrrolidone in the vaporization cavity 301 to enter the access cavity 302.

[0047] The pulling device 225 can pull up the sealing plug 32 to the top of the connecting port 305, so that the N-vinyl pyrrolidone gas enters the material changing chamber 304 from the connecting port 305. At this time, the N-vinyl pyrrolidone gas extraction system is running, and the exhaust head 223 extracts all the gas in the independent gasification tank 3; then the N-vinyl pyrrolidone gas extraction system is stopped, the N-vinyl pyrrolidone supply system is running, and the injection head 222 continuously injects N-vinyl pyrrolidone into the material changing chamber 304, and N-vinyl pyrrolidone enters the access chamber 302 from the connecting port 305 and finally flows into the gasification chamber 301. The bottom surface height of the material changing chamber 304 is not lower than the bottom surface height of the connecting port 305, and the bottom surface height of the connecting port 305 is not lower than the placement shoulder 303, so that the N-vinyl pyrrolidone injected into the material changing chamber 304 can all flow into the gasification chamber 301.

[0048] After the new N-vinyl pyrrolidone to be gasified is injected into the gasification chamber 301, the lifting device 225 presses the sealing plug 32 down again until the movable block 323 is inserted into the limiting socket 3202 to lock the sealing plug 32. At this time, the telescopic member 23 shortens and drives the entire refueling head 22 to move upward, while the lifting device 225 extends synchronously to press the independent gasification tank 3 down, so that the refueling head 22 overcomes the external air pressure and detaches from the independent gasification tank 3. At this time, the gasification chamber 301 is still in a vacuum state, and the external air pressure will further press the sealing plug 32 down to ensure the airtightness of the gasification chamber 301.

[0049] An abnormal warning device 5 is arranged at the upper end of the independent gasification tank 3, and the abnormal warning device 5 includes two splicing covers 51, an N-vinyl pyrrolidone gas detection component 52 and a magnetic control opening and closing component 53. The splicing cover 51 includes a cover plate 511 and a semi-annular wall 512. The inner diameter of the semi-annular wall 512 is larger than the outer diameter of the independent gasification tank 3, so that the abnormal warning device 5 can be buckled on the independent gasification tank 3 as a whole. At this time, the splicing cover 51 can cover the access chamber 302 and the top of the material replacement chamber 304.

[0050] A guide assembly 54 is installed between the outer wall of the independent gasification tank 3 and the inner wall of the semi-circular surrounding wall 512. The guide assembly 54 includes a movable connector 541 and a positioning rail 542. The movable connector 541 can be slidably arranged in the positioning rail 542 and cannot be disengaged from the positioning rail 542. One end of the movable connector 541 can extend from the positioning rail 542, and the end of the movable connector 541 extending from the positioning rail 542 is connected to the inner wall of the semi-circular surrounding wall 512. The end of the positioning rail 542 away from the semi-circular surrounding wall 512 is connected to the outer wall of the independent gasification tank 3. The guide assembly 54 is symmetrically arranged outside the independent gasification tank 3, and is respectively connected to the two splicing covers 51. The splicing covers 51 can only move toward or away from each other in the horizontal direction under the restriction of the guide assembly 54.

[0051] The magnetically controlled opening and closing component 53 includes a rangefinder 531, an electromagnetic block 532 and a current controller 533. There are two pairs of the electromagnetic block 532 and the current controller 533, which are respectively installed in two cover plates 511. The current controller 533 is powered by an external power supply and is electrically connected to the electromagnetic block 532. The current controller 533 arranged in the two cover plates 511 can change the direction of the current delivered to the electromagnetic block 532 so that the magnetic poles at both ends of the electromagnetic block 532 are changed.

[0052] The rangefinder 531 is installed on the top of the cover plate 511. The rangefinder 531 is powered by an external power supply and electrically connected to the current controller 533. The rangefinder 531 can detect whether there is an obstacle above. When the independent gasification tank 3 is driven by the rotating belt 13 and moves to the bottom of the fixed beam 21, the rangefinder 531 will detect the existence of the fixed beam 21 above. When the independent gasification tank 3 has not moved to the bottom of the fixed beam 21, the rangefinder 531 has not detected the existence of the fixed beam 21 above it. At this time, the currents delivered by the two current controllers 533 are in the same direction, and the magnetic poles of the two electromagnetic blocks 532 on the opposite sides are different and attract each other. The two splicing covers 51 will move toward each other and dock under the action of the magnetic attraction force to shield the access cavity 302 and the material change cavity 304 above; when the independent gasification tank 3 moves to the bottom of the fixed beam 21, the rangefinder 531 detects the existence of the fixed beam 21 above it. At this time, the currents delivered by the two current controllers 533 are in opposite directions, and the magnetic poles of the two electromagnetic blocks 532 on the opposite sides are the same and repel each other. The two splicing covers 51 will move relatively and separate under the action of the magnetic repulsion force to open the access cavity 302 and the material change cavity 304 for the material change head 22 to dock.

[0053] The N-vinyl pyrrolidone gas detection component 52 includes a detection head 521 and a PLC controller 522. The detection head 521 is embedded in the cover plate 511. When the two splicing covers 51 are correspondingly spliced, the detection head 521 is located above the access chamber 302 or the material exchange chamber 304, so as to timely detect danger when N-vinyl pyrrolidone gas leakage occurs in the gasification chamber 301. The PLC controller 522 is electrically connected to the detection head 521, and corresponding response processing can be performed after the detection head 521 detects N-vinyl pyrrolidone gas leakage.

[0054] The base platform 11 is provided with a safety mechanism 6 on the outside, which is used to safely transport the independent gasification tank 3 with the leakage of vinyl pyrrolidone gas out of the sealed shell 4 for harmless treatment. The safety mechanism 6 includes a support assembly 61, a sealing assembly 62 and an output assembly 63. The base platform 11 has a support groove 103 that can accommodate the support assembly 61. The support assembly 61 includes a telescopic rod 611 and a support cover 612. The support cover 612 is driven by the telescopic rod 611 and can move horizontally in the support groove 103. The telescopic rod 611 can move the support cover 612 to a designated position on the moving path of the independent gasification tank 3 driven by the rotary belt 13. The support cover 612 is flush with the upper surface of the base platform 11. Under normal circumstances, the telescopic rod 611 moves the support cover 612 to the designated position, and each independent gasification tank 3 can be rotated and moved on the base platform 11 along the designated path.

[0055] The telescopic rod 611 is electrically connected to the PLC controller 522, and the PLC controller 522 is also electrically connected to the driving device of the driving member 15. After the detection head 521 detects the leakage of N-vinyl pyrrolidone gas, the PLC controller 522 can control the driving member 15 to move the leaking independent gasification tank 3 to the top of the lining cover 612 by means of the rotary belt 13. The sealing assembly 62 can be moved to the bottom of the lining cover 612. After the independent gasification tank 3 moves to the top of the lining cover 612, the telescopic rod 611 pulls the lining cover 612 and no longer supports the independent gasification tank 3, so that the independent gasification tank 3 falls into the sealing assembly 62 for sealed storage.

[0056] The sealing assembly 62 includes a receiving tank 621 and a sealing cover 622. The upper surface of the sealing cover 622 is provided with a permanent magnetic sheet 623. The lower surface of the supporting cover 612 has a temporary storage cavity 601. The top surface of the temporary storage cavity 601 is provided with a magnetic block 613. The temporary storage cavity 601 allows the sealing cover 622 to enter. The upper end of the receiving tank 621 is open. The sealing cover 622 can be detachably placed on the upper part of the opening of the receiving tank 621 under normal circumstances. Before the telescopic rod 611 drives the supporting cover 612 to move away from the top of the sealing assembly 62, the magnetic block 613 will be energized to generate magnetism, so as to temporarily suck the sealing cover 622 with the permanent magnetic sheet 623 into the temporary storage cavity 601 and separate from the sealing cover 622. The attracted sealing cover 622 is moved away together with the supporting cover 612, so that the independent gasification tank 3 falls smoothly into the receiving tank 621.

[0057] After the independent gasification tank 3 falls into the receiving tank 621, the telescopic rod 611 drives the supporting cover 612 to move back to the top of the receiving tank 621. At this time, the magnetic block 613 is powered off and loses its magnetism, and the sealing cover 622 falls back on the upper part of the receiving tank 621 to cover the opening. A circle of sealing grooves 602 is provided at the top opening of the receiving tank 621. The lower surface of the sealing cover 622 has a circle of corresponding grooves 603 corresponding to the sealing grooves 602. A circle of electric heating wires 624 is laid on the top surface of the corresponding grooves 603. The lower part of the electric heating wires 624 is filled with sealing wax 625. The volume of the sealing wax 625 in the corresponding grooves 603 is greater than the volume of the sealing grooves 602. The sealing wax 625 is pre-filled in the corresponding grooves 603 and is in a solidified state. At this time, the sealing cover 622 and the receiving tank 621 are detachably docked.

[0058] The outer side of the sealing cover 622 is provided with a power connection piece 626 electrically connected to the heating wire 624, and the lower end of the supporting cover 612 is provided with a docking piece 614 fitted with the outer side of the sealing cover 622. When the sealing cover 622 covers the upper end of the opening of the receiving tank 621, the power connection piece 626 fits with the docking piece 614, so that the current can flow to the power connection piece 626 through the docking piece 614. After the independent gasification tank 3 falls into the receiving tank 621, the sealing cover 622 covers the receiving tank 621 again, and the supporting assembly 61 transmits electric energy to the power connection piece 626, and finally flows to the heating wire 624. After the heating wire 624 is energized, the originally solidified sealing wax 625 is heated and melted and flows downward into the sealing groove 602 until the sealing groove 602 is filled and part of the liquid sealing wax 625 is in the corresponding groove 603. After the sealing wax 625 is filled, the sealing groove 602 supporting assembly 61 stops supplying power, and the sealing wax 625 cools down again to fill and seal the gap between the receiving tank 621 and the sealing cover 622 to prevent N-vinylpyrrolidone gas from leaking out of the receiving tank 621 .

[0059] The output assembly 63 includes a guide bin 631, a placement bin 632 and a belt shifter 633. The guide bin 631 extends from the base platform 11 to the outside of the sealed shell 4. The guide bin 631 is hollow inside. The portion of the guide bin 631 extending to the outside of the sealed shell 4 has a removal outlet 604. The placement bin 632 is arranged in the guide bin 631. Both sides of the placement bin 632 are close to the inner wall of the guide bin 631. The placement bin 632 remains vertical under the restriction of the guide bin 631. The placement bin 632 has an opening at the upper end and is hollow inside to allow the receiving tank 621 to be placed in the placement bin 632. After the receiving tank 621 is placed in the placement bin 632, the surrounding areas are in contact with the inner wall of the placement bin 632 to remain vertical in the placement bin 632 and can move horizontally with the placement bin 632.

[0060] The belt moving member 633 is arranged in the guide bin 631, and the belt moving member 633 includes a motor 6331, a screw 6332 and an outer cover head 6333, the outer cover head 6333 is connected to the placement bin 632, the screw 6332 is threadedly connected to the outer cover head 6333, the screw 6332 is arranged horizontally and extends to the outside of the sealing shell 4, and the motor 6331 can drive the screw 6332 to rotate axially, thereby driving the outer cover head 6333 and the placement bin 632 to move horizontally. The sealing assembly 62 containing the leaking independent gasification tank 3 will be driven by the output assembly 63 to move to the removal port 604, and will be taken out by the technicians for subsequent harmless treatment.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An abnormal warning device for N-vinyl pyrrolidone production, used to ensure the safety of an N-vinyl pyrrolidone vaporizer composed of a rotation device (1), a material changing device (2) and a plurality of independent gasification tanks (3), wherein the rotation device (1) drives the independent gasification tanks (3) to rotate, and the material changing device (2) injects N-vinyl pyrrolidone into the independent gasification tanks (3) and extracts the N-vinyl pyrrolidone gas, comprising two splicing covers (51), an N-vinyl pyrrolidone gas detection component (52) and a magnetically controlled opening and closing component (53), characterized in that: The spliced ​​cover (51) comprises a cover plate (511) and a semi-circular surrounding wall (512), the inner diameter of the semi-circular surrounding wall (512) being larger than the outer diameter of the independent gasification tank (3), and the N-vinyl pyrrolidone gas detection component (52) comprising a detection head (521) and a PLC controller (522), and the detection head (521) is embedded and installed in the cover plate (511); The magnetically controlled opening and closing component (53) comprises a distance meter (531), an electromagnetic block (532) and a current controller (533); the distance meter (531) is mounted on the top of the cover plate (511); and the electromagnetic block (532) is electrically connected to the current controller (533).

2. The abnormal warning device for N-vinyl pyrrolidone production according to claim 1, characterized in that: A guide assembly (54) is installed between the outer wall of the independent gasification tank (3) and the inner wall of the semi-annular surrounding wall (512), and the guide assembly (54) includes a movable connecting head (541) and a positioning rail (542). The movable connecting head (541) can be slidably arranged in the positioning rail (542) and cannot be separated from the positioning rail (542).

3. The abnormal warning device for N-vinyl pyrrolidone production according to claim 2, characterized in that: One end of the movable connecting head (541) can extend from the positioning rail (542), and the end of the movable connecting head (541) extending from the positioning rail (542) is connected to the inner wall of the semi-annular surrounding wall (512), and the end of the positioning rail (542) away from the semi-annular surrounding wall (512) is connected to the outer wall of the independent gasification tank (3).

4. The abnormal warning device for N-vinyl pyrrolidone production according to claim 1, characterized in that: Two pairs of the electromagnetic blocks (532) and the current controllers (533) are provided and are respectively installed in two cover plates (511). The current controllers (533) are electrically connected to the PLC controller (522).

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