Adipic acid crystallizer stirring magnetic liquid seal online replacement device

Abstract

The present invention discloses an online replacement device for agitating a magnetic liquid seal of an adipic acid crystallizer. The device comprises a magnetic liquid seal device, a conversion seal device, and a support seat fixedly connected in sequence, and a sealing shaft is provided through the magnetic liquid seal device, the conversion seal device, and the support seat. The magnetic liquid seal device comprises: a lock sleeve assembly, an upper end pressure cover, a shaft sleeve, a magnetic liquid seal assembly, a lower end pressure cover, and a sealing seat. The conversion seal device comprises: an upper seat body, an upper pressure cover, a disc nut, a lower pressure cover, a conversion seal sleeve, a lower seat body, and a shelf shaft ring. The lower end of the shelf shaft ring contacts the conical sealing surface of the support seat to form a first sealing point. The present invention can realize rapid conversion of the sealing point when the magnetic liquid seal fails to work properly, forming a new sealing point between the conversion seal device and the support seat, thereby enabling online repair and replacement of the magnetic liquid seal device, thereby avoiding the entire crystallizer stirring set from stopping due to damage to the magnetic liquid seal device.

Description

Technical Field

[0001] The present invention relates to the field of crystallizer stirring equipment, in particular to the field of stirring and sealing technology. Background Art

[0002] With the advancement of science and technology, the application areas of adipic acid are constantly expanding. The crystallizer is the core device in the adipic acid production process, and the agitator is the core component of the adipic acid crystallizer. The agitator magnetic liquid seal is the core of the core. Failure of the sealing system can lead to unstable negative pressure in the crystallizer, causing production fluctuations, and the agitator magnetic liquid seal must be stopped and replaced. Because each crystallizer stirs a large number of units and operates as a single device, a failure of any agitator shaft seal will affect the stable operation of the system. Therefore, to ensure the long-term operation of the crystallizer, it is imperative to find a method for replacing the agitator shaft magnetic liquid seal online without stopping the machine. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an online replacement device that does not affect the internal pressure of the crystallizer equipment and enables the stirring seal to be replaced without stopping the production equipment, thereby achieving the effect of not affecting the operation of the crystallizer equipment and not affecting the output.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an online replacement device for stirring magnetic liquid seal of an adipic acid crystallizer, characterized in that it includes: a magnetic liquid sealing device, a conversion sealing device, a bracket seat, and a sealing shaft;

[0005] The magnetic liquid sealing device, the conversion sealing device, and the bracket seat are fixedly connected in sequence, and the sealing shaft is arranged through the magnetic liquid sealing device, the conversion sealing device, and the bracket seat;

[0006] The magnetic liquid sealing device includes: a locking sleeve assembly, an upper end gland, a shaft sleeve, a magnetic liquid sealing assembly, a lower end gland and a sealing seat. The sealing seat is sleeved on the outside of the shaft sleeve, and the shaft sleeve is sleeved on the outside of the sealing shaft. The locking sleeve assembly is used to fasten the shaft sleeve on the sealing shaft. The magnetic liquid sealing assembly is sleeved between the shaft sleeve and the sealing seat. The upper end gland is fixed to the upper end of the sealing seat, and the lower end gland is fixed to the lower end of the sealing seat.

[0007] The conversion sealing device includes: an upper seat body, an upper pressure cover, a disc nut, a lower pressure cover, a conversion sealing sleeve, a lower seat body and a shelf shaft ring. The upper seat body is used to connect and support the magnetic liquid sealing device. The upper end surface of the upper seat body cooperates with the sealing seat. The lower seat body is used to connect the upper seat body and the bracket seat. The lower end surface of the lower seat body cooperates with the upper end of the bracket seat. The upper pressure cover is arranged on the lower end surface of the upper seat body. The lower pressure cover is arranged on the upper end surface of the lower seat body. The disc nut is located between the upper seat body and the lower seat body. The disc nut has an internal thread. The conversion sealing sleeve is sleeved on the outside of the sealing shaft. The conversion sealing sleeve has an external thread. The internal thread of the nut cooperates with the external thread of the conversion sealing sleeve. The disc nut is moved to make the conversion sealing sleeve realize lifting movement. The shelf shaft ring is fixed to the lower end of the sealing shaft.

[0008] The bracket seat has a tapered sealing surface;

[0009] The lower end of the shelf shaft ring contacts the conical sealing surface of the bracket seat to form a first sealing point;

[0010] A second sealing point is formed between the magnetic liquid sealing component and the shaft sleeve;

[0011] A sealing ring is provided between the shaft sleeve and the sealing shaft to form a third sealing point;

[0012] A sealing ring and a sealing gasket are arranged between the lower end pressure cover and the upper seat body to form a fourth sealing point.

[0013] As a further technical solution, the conversion sealing device also includes: two groups of packing sealing assemblies, one group of packing sealing assemblies is arranged between the upper seat body and the upper pressure cover to form the fifth sealing point with the conversion sealing sleeve, and the other group of packing sealing assemblies is arranged between the lower seat body and the lower pressure cover to form the sixth sealing point with the conversion sealing sleeve; the bracket seat also has an upper end sealing surface, and a sealing ring and a sealing gasket are arranged between the lower seat body and the upper end sealing surface of the bracket seat to form a seventh sealing point.

[0014] As a further technical solution, a guide pin is provided at the upper end of the conversion sealing sleeve, and the guide pin cooperates with the guide groove of the upper seat body to ensure that the conversion sealing sleeve can only move up and down, and the lower end of the conversion sealing sleeve is a pressing end.

[0015] As a further technical solution, a gasket boss is provided on the inner wall of the upper end of the upper seat body, and a connecting flange is provided on the lower end of the upper seat body; the upper gland has a positioning platform and a limiting groove, and sealing rings are provided on the inner and outer walls of the upper gland; the packing sealing assembly between the upper seat body and the upper gland includes a packing gasket, a packing and a packing pressure ring; the packing gasket, the packing and the packing pressure ring between the upper seat body and the upper gland are provided at the gasket boss on the inner wall of the upper end of the upper seat body, the upper seat body, the packing gasket, the packing, the packing pressure ring and the upper gland are assembled in sequence, and the upper gland is fastened and pressed with screws after being matched with the upper seat body through the positioning platform of the upper gland;

[0016] A gasket boss is provided on the inner wall of the lower end of the lower seat body, and a support block is provided on the upper end of the lower seat body, and a screw thread hole is provided on the support block; the lower pressure cover has a positioning platform and a limiting groove, and sealing rings are provided on the inner and outer walls of the lower pressure cover; the packing sealing assembly between the lower seat body and the lower pressure cover includes a packing gasket, a packing and a packing pressure ring; the packing gasket, the packing and the packing pressure ring between the lower seat body and the lower pressure cover are provided at the gasket boss on the inner wall of the lower end of the lower seat body; the lower pressure cover, the packing pressure ring, the packing, the packing gasket and the lower seat body are assembled in sequence, and the lower pressure cover is matched with the lower seat body through the positioning platform of the lower pressure cover and is tightened with screws;

[0017] After the lower end of the upper seat body is positioned and matched with the upper end of the lower seat body, the connecting flange and the support block are fastened with screws to connect the upper seat body and the lower seat body.

[0018] As a further technical solution, the disc selector nut has a dial hole on the side, which is used to dial the rotating disc selector nut; the upper and lower end surfaces of the disc selector nut are provided with bearing rail grooves, which are respectively opposite to the bearing rail grooves at the lower end of the upper seat body and the bearing rail grooves at the upper end of the lower seat body; thrust bearings are arranged between the disc selector nut and the lower end surface of the upper seat body and between the upper end surface of the lower seat body, and the thrust bearings are arranged in the bearing rail grooves of the disc selector nut, the upper seat body and the lower seat body to reduce the resistance when the disc selector nut rotates.

[0019] As a further technical solution, the upper and lower end surfaces of the disc nut only contact the thrust bearing, and there are gaps between the disc nut and the lower end surface of the upper seat body, the lower end surface of the upper pressure cover, the upper end surface of the lower seat body, and the upper end surface of the lower pressure cover.

[0020] As a further technical solution, the inner ring and the lower inclined surface of the shelf shaft ring are both provided with sealing rings, the side of the shelf shaft ring has a penetrating screw hole, the sealing shaft has a screw hole, the shelf shaft ring is fixed to the sealing shaft by a hexagonal flat-end set screw, and the first sealing point is formed between the lower inclined surface of the shelf shaft ring and the conical sealing surface of the bracket seat.

[0021] As a further technical solution, there is a gap between the inner wall of the conversion sealing sleeve and the sealing shaft, so that there is no interference between the inner wall of the conversion sealing sleeve and the sealing shaft when the crystallizer is stirring.

[0022] As a further technical solution, the magnetic liquid sealing assembly includes: a pole shoe and a magnet.

[0023] As a further technical solution, the shaft sleeve and the sealing seat are further sleeved with: a bearing support ring, a deep groove ball bearing, a spring retaining ring, and a bearing washer.

[0024] The present invention discloses an online replacement device for agitating a magnetic liquid seal of an adipic acid crystallizer. The device can realize rapid conversion of the sealing point when the magnetic liquid seal fails to work normally, form a new sealing point between the conversion sealing device and the bracket seat, and thus realize online repair and replacement of the magnetic liquid sealing device, thereby avoiding the entire crystallizer stirring being stopped due to damage to the magnetic liquid sealing device, thereby saving a lot of manpower, material resources and supplies. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a two-dimensional structural diagram of an embodiment of the present invention.

[0026] Figure 2 This is a three-dimensional structure diagram of the crystallizer stirring.

[0027] Figure 3 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0028] Figure 4 This is a three-dimensional structural diagram of the conversion sealing device.

[0029] Figure 5 It is a two-dimensional structural diagram of the conversion sealing device.

[0030] Figure 6 This is a diagram of the sealing point during crystallizer stirring operation.

[0031] Figure 7 This is a diagram of the sealing point during online replacement of the magnetic liquid sealing device.

[0032] Explanation of symbols in the drawings: 10 motor bracket; 11 bracket seat; 110 upper end sealing surface; 111 conical sealing surface; 12 drive shaft; 120 drive shaft flange; 13 sealing shaft; 130 sealing shaft upper flange; 131 sealing shaft lower flange; 132 screw hole; 14 stirring shaft; 140 stirring shaft flange; 141 stirring blade; 15 stirrer housing; 16 motor; 170 hexagon socket head screw; 171 hexagon socket flat point set screw; 172 hexagonal nut; 173 stud;

[0033] 2. Magnetic liquid sealing device; 20. Lock sleeve assembly; 21. Upper end gland; 210. Oil seal; 22. Shaft sleeve; 220. Sealing ring; 23. Bearing support ring; 24. Deep groove ball bearing; 25. Spring retaining ring; 26. Bearing washer; 27. Magnetic liquid sealing assembly; 270. Pole shoe; 271. Magnet; 28. Lower end gland; 280. Shaft seal; 281. Sealing ring; 282. Sealing pad; 29. ​​Sealing seat;

[0034] 3 conversion seal device; 30 upper seat; 300 guide groove; 301 gasket boss; 302 bearing rail groove; 31 packing seal assembly; 310 packing gasket; 311 packing; 312 packing pressure ring; 32 upper gland; 320 sealing ring; 321 positioning platform; 322 limiting groove; 33 thrust bearing; 34 disc nut; 340 dial hole; 341 nut internal thread; 342 bearing rail groove; 35 lower gland; 350 sealing ring; 351 positioning platform; 3 52 limiting groove; 36 conversion sealing sleeve; 360 guide pin; 361 external thread; 362 clamping end; 37 lower seat body; 370 gasket boss; 371 bearing rail groove; 372 sealing ring; 373 sealing gasket; 374 support block; 38 shaft ring; 380 sealing ring; 381 screw thread hole; 40 first sealing point; 41 second sealing point; 42 third sealing point; 43 fourth sealing point; 44 fifth sealing point; 45 sixth sealing point; 46 seventh sealing point. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, which do not limit the scope of protection of the present invention.

[0036] like Figure 1-7 The figure shows an embodiment of the in-line replacement device for a crystallizer stirring magnetic liquid seal according to the present invention. The device comprises a magnetic liquid seal 2, a conversion seal 3, a support 11, and a sealing shaft 13. The magnetic liquid seal 2, conversion seal 3, and support 11 are fixedly connected in sequence, and the sealing shaft 13 is disposed through the magnetic liquid seal 2, conversion seal 3, and support 11.

[0037] The magnetic liquid sealing device 2 includes: a locking sleeve assembly 20, an upper end gland 21, a sleeve 22, a magnetic liquid sealing assembly 27, a lower end gland 28, and a sealing seat 29. The sealing seat 29 is sleeved on the outside of the sleeve 22, and the sleeve 22 is sleeved on the outside of the sealing shaft 13. The locking sleeve assembly 20 is used to fasten the sleeve 22 to the sealing shaft 13. The magnetic liquid sealing assembly 27 is sleeved between the sleeve 22 and the sealing seat 29. The upper end gland 21 is fixed to the upper end of the sealing seat 29, and the lower end gland 28 is fixed to the lower end of the sealing seat 29. The magnetic liquid sealing assembly 27 includes: a pole shoe 270; a magnet 271. Also sleeved between the sleeve 22 and the sealing seat 29 are: a bearing support ring 23, a deep groove ball bearing 24, a spring retaining ring 25, and a bearing washer 26.

[0038] The conversion sealing device 3 includes: an upper seat body 30, an upper pressure cover 32, a disc nut 34, a lower pressure cover 35, a conversion sealing sleeve 36, a lower seat body 37 and a shelf ring 38. The upper seat body 30 is used to connect and support the magnetic liquid sealing device 2. The upper end surface of the upper seat body 30 cooperates with the sealing seat 29. The lower seat body 37 is used to connect the upper seat body 30 and the bracket seat 11. The lower end surface of the lower seat body 37 cooperates with the upper end of the bracket seat 11. The upper pressure cover 32 is set on the lower end surface of the upper seat body 30. The pressure cover 35 is arranged on the upper end surface of the lower seat body 37, and the disc nut 34 is located between the upper seat body 30 and the lower seat body 37. The disc nut 34 has an internal nut thread 341. The conversion sealing sleeve 36 is sleeved on the outside of the sealing shaft 13. The conversion sealing sleeve 36 has an external thread 361. The internal nut thread 341 cooperates with the external thread 361 of the conversion sealing sleeve. When the disc nut 34 is moved, the conversion sealing sleeve 36 can realize the lifting movement. The shaft ring 38 is fixed to the lower end of the sealing shaft 13.

[0039] The bracket seat 11 has an upper end sealing surface 110 and a tapered sealing surface 111 .

[0040] like Figure 1 、 Figure 7 As shown, the upper end surface of the upper body 30 cooperates with the sealing seat 29 of the magnetic liquid sealing device. The lower end gland 28 is fixed to the lower end of the sealing seat 29 by screws 170. The lower end gland 28 is provided with a sealing ring 281 and a sealing gasket 282. The upper end surface of the upper body 30 and the lower end surface of the lower end gland 28 have a fourth sealing point 43. The inner wall of the upper end of the upper body 30 is provided with a guide groove 300 and a gasket boss 301. The lower end of the upper body 30 has a bearing rail groove 302 and a connecting flange. The bracket seat 11 has an upper end sealing surface 110 and a tapered sealing surface 111. The sealing shaft 13 has a screw hole 132. The inner ring and the lower inclined surface of the shelf shaft ring 38 are both provided with a sealing ring 380. The side of the shelf shaft ring 38 has a penetrating screw hole 381. The shelf shaft ring 38 is firmly fixed to the sealing shaft 13 by the hexagonal flat-end set screw 171. A first sealing point 40 can be formed between the lower inclined surface of the shelf shaft ring 38 and the conical sealing surface 111 of the bracket seat.

[0041] like Figure 4 、 Figure 5 、 Figure 6As shown, the lower end surface of the lower seat 37 mates with the upper end of the bracket seat 11. A sealing ring 372 and a sealing gasket 373 are provided on the lower end surface of the lower seat 37. The lower end surface of the lower seat 37 forms a seventh sealing point 46 with the sealing surface 110 of the bracket seat upper end. A gasket boss 370 is provided on the inner wall of the lower end of the lower seat 37. The upper end of the lower seat 37 has a bearing track groove 371 and a support block 374, which is provided with screw holes. The packing seal assembly 31 includes a packing ring 310, packing 311, and a packing press ring 312. A guide pin 360 is provided on the upper end of the conversion seal sleeve 36. This guide pin 360 mates with the guide groove 300 of the upper seat to ensure that the conversion seal sleeve 36 can only move up and down. The conversion seal sleeve 36 also includes external threads 361. The lower end of the conversion seal sleeve 36 is a compression end 362. The upper gland 32 has a positioning platform 321 and a retaining groove 322. Seal rings 320 are provided on both the inner and outer walls of the upper gland 32. The conversion sealing sleeve 36 is assembled on the upper seat body 30 from top to bottom, and the packing gasket 310, packing 311, and packing pressure ring 312 are assembled in sequence on the gasket boss 301 in the inner cavity of the upper seat body 30. The upper pressure cover 32 is matched with the upper seat body 30 through the positioning platform 321 and is tightened with screws 170. At this time, there is a fifth sealing point 44 between the packing sealing assembly 31, the upper pressure cover 32, the upper seat body 30 and the conversion sealing sleeve 36. The disc selector 34 has a side opening 340 for rotating the disc selector 34. Bearing grooves 342 are located on the upper and lower end surfaces of the disc selector 34. Thrust bearings 33 are positioned between the disc selector 34 and the lower end surface of the upper housing 30, as well as between the upper end surface of the lower housing 37. These thrust bearings significantly reduce resistance to the rotation of the disc selector 34. Furthermore, the inner wall of the disc selector 34 is provided with an internal selector thread 341, which mates with the external thread 361 of the conversion seal. The lower gland 35 has a positioning platform 351 and a retaining groove 352. Seals 350 are located on both the inner and outer walls of the lower gland 35. The lower gland 35, packing ring 312, packing 311, packing washer 310, and lower housing 37 are assembled to the conversion seal sleeve 36 in sequence. The lower gland 35 engages with the lower housing 37 via the positioning platform 351 and is then tightened with screws 170. This creates a sixth sealing point 45 between the packing seal assembly 31, lower gland 35, lower housing 37, and conversion seal sleeve 36. After the lower end of the upper housing 30 is aligned with the upper end of the lower housing 37, the connecting flange and support block 374 are tightened with screws 170 to connect the upper and lower housings 30 and 37. The upper and lower end surfaces of the disc nut 34 contact only the thrust bearing 33. A certain clearance exists between the lower end surfaces of the upper housing 30, the lower end surface of the upper gland 32, the upper end surface of the lower housing 37, and the upper end surface of the lower gland 35, ensuring smooth rotation of the disc nut 34 with minimal resistance. There is a large gap between the inner wall of the conversion sealing sleeve 36 and the sealing shaft 13, so there is no interference during the stirring operation of the crystallizer.

[0042] like Figure 6As shown, in the magnetic liquid sealing device 2, a second sealing point 41 is formed between the magnetic liquid sealing assembly 27 and the shaft sleeve 22, and a sealing ring 220 is provided between the shaft sleeve 22 and the sealing shaft 13 to form a third sealing point 42. When the magnetic liquid sealing device 2 is operating normally, the second sealing point 41, the third sealing point 42, the fourth sealing point 43, the fifth sealing point 44, the sixth sealing point 45, and the seventh sealing point 46 function as a seal. The shaft shelf ring 38 has no contact with the bracket seat 11 and the conversion sealing sleeve 36, and thus the first sealing point 40 is not formed, and no sealing effect is achieved.

[0043] like Figure 2 、 Figure 3 、 Figure 7 As shown, when the magnetic liquid sealing device 2 fails, the seal conversion is realized, that is, the seal of the second sealing point 41 fails, the flange 130 on the sealing shaft is loosened, and the lock sleeve assembly 20 in the magnetic liquid sealing device 2 is loosened. At this time, the sealing shaft 13 descends, and the lower end of the shelf ring 38 contacts the conical sealing surface 111 of the bracket seat to form the first sealing point 40. At this time, the disc nut 34 is dialed to move the conversion seal sleeve 36 downward and lock the first sealing point 40. At the same time, the second sealing point 41, the third sealing point 42, the fourth sealing point 43, the fifth sealing point 44, the sixth sealing point 45 and the seventh sealing point 46 do not have a sealing effect. The failed magnetic liquid sealing device 2 is replaced.

[0044] The operation mode and principle of the present invention are as follows:

[0045] Combine Figure 1-Figure 7When a magnetic liquid sealing device 2 of the stirring shaft in the adipic acid crystallizer fails, in order not to affect the stable operation of the entire crystallizer system, the magnetic liquid sealing device needs to be replaced online without stopping. The present invention can easily realize the conversion of the sealing point, so that the pressure in the crystallizer system is stable during the replacement of the magnetic liquid sealing device 2. The specific steps are: disassemble the components connecting the drive shaft 12 and the motor 16, disassemble the hexagonal nut 172 and the stud 173 used to connect the motor bracket 10 and the motor 16, and lift the motor 16 out; disassemble the hexagonal nut 172 and the stud 173 used to connect the drive shaft flange 120 and the sealing shaft upper flange 130, loosen the lock shaft sleeve assembly 20 in the magnetic liquid sealing device 2, and under the action of the stirring shaft 14 and the stirring blade 141, the sealing shaft 13 falls, and the lower end of the shelf ring 38 contacts the conical sealing surface 111 of the bracket seat to form the first sealing point 40. At this time, the disc nut 34 is turned to convert the sealing sleeve 36 to move down and lock the first sealing point 40, while the second sealing point 40 is locked. The sealing point 41, the third sealing point 42, the fourth sealing point 43, the fifth sealing point 44, the sixth sealing point 45 and the seventh sealing point 46 do not have a sealing function; the motor bracket 10 is lifted out, the magnetic liquid sealing device 2 is disassembled and replaced; the disc nut 34 is turned to lift the conversion sealing sleeve 36, the drive shaft 12 and the flange 130 on the sealing shaft are connected and the lock sleeve assembly 20 is tightened, the first sealing point 40 disappears, the second sealing point 41, the third sealing point 42, the fourth sealing point 43, the fifth sealing point 44, the sixth sealing point 45 and the seventh sealing point 46 have a sealing function, the motor bracket 10 is installed, the motor 16 and the drive shaft 12 assembly are connected, and the crystallizer stirring works normally.

[0046] The advantages of the present invention are:

[0047] 1. The upper seat, disc nut and lower seat of the conversion seal device are all equipped with bearing grooves, which can greatly shorten the axial length of the conversion seal device. The upper and lower end surfaces of the disc nut are equipped with thrust bearings, which can greatly reduce the resistance when the disc nut rotates.

[0048] 2. The fifth and sixth sealing points in the conversion sealing device are sealed with packing sealing components and multiple sealing rings to ensure the sealing performance of the mixer during normal operation.

[0049] 3. When the sealing effect of the magnetic liquid sealing assembly in the magnetic liquid sealing device is not good, loosen the flange on the sealing shaft and the lock sleeve assembly, quickly form the first sealing point between the shelf shaft ring and the bracket seat in the conversion sealing device, and press the shelf shaft ring down with the compression end of the conversion sealing sleeve to ensure uniform force, thereby ensuring the reliability of the first sealing point during the replacement operation of the magnetic liquid sealing device.

[0050] 4. The present invention realizes the conversion between sealing points without affecting the internal pressure of the crystallizer equipment, and can realize the replacement of the stirring seal without stopping the production device, thereby achieving the effect of not affecting the operation of the crystallizer equipment and not affecting the output.

[0051] 5. The present invention enables the replacement of the stirring shaft sealing device without stopping the production device, and will not cause other agitators or equipment to be shut down, and will not cause the life of the equipment to be shortened due to multiple openings of the equipment. The process will not be forced to stop during the production process, and there is no need to reopen the production process. The equipment operates normally, and the operator does not need to handle the materials in the equipment, thereby saving production costs.

[0052] 6. Extending the equipment operation cycle and ensuring stable production, the focus has shifted from preventive maintenance to condition-based maintenance, which has greatly reduced the frequency of maintenance and saved a lot of manpower, material resources and supplies.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. An online replacement device for agitating magnetic liquid seal of an adipic acid crystallizer, characterized in that: It includes: Magnetic liquid sealing device, conversion sealing device, bracket seat, sealing shaft; The magnetic liquid sealing device, the conversion sealing device, and the bracket seat are fixedly connected in sequence, and the sealing shaft is arranged through the magnetic liquid sealing device, the conversion sealing device, and the bracket seat; The magnetic liquid sealing device includes: a locking sleeve assembly, an upper end gland, a shaft sleeve, a magnetic liquid sealing assembly, a lower end gland and a sealing seat. The sealing seat is sleeved on the outside of the shaft sleeve, and the shaft sleeve is sleeved on the outside of the sealing shaft. The locking sleeve assembly is used to fasten the shaft sleeve on the sealing shaft. The magnetic liquid sealing assembly is sleeved between the shaft sleeve and the sealing seat. The upper end gland is fixed to the upper end of the sealing seat, and the lower end gland is fixed to the lower end of the sealing seat. The conversion sealing device includes: an upper seat body, an upper pressure cover, a disc nut, a lower pressure cover, a conversion sealing sleeve, a lower seat body and a shelf shaft ring. The upper seat body is used to connect and support the magnetic liquid sealing device. The upper end surface of the upper seat body cooperates with the sealing seat. The lower seat body is used to connect the upper seat body and the bracket seat. The lower end surface of the lower seat body cooperates with the upper end of the bracket seat. The upper pressure cover is arranged on the lower end surface of the upper seat body. The lower pressure cover is arranged on the upper end surface of the lower seat body. The disc nut is located between the upper seat body and the lower seat body. The disc nut has an internal thread. The conversion sealing sleeve is sleeved on the outside of the sealing shaft. The conversion sealing sleeve has an external thread. The internal thread of the nut cooperates with the external thread of the conversion sealing sleeve. The disc nut is moved to make the conversion sealing sleeve realize lifting movement. The shelf shaft ring is fixed to the lower end of the sealing shaft. The bracket seat has a tapered sealing surface; The lower end of the shelf shaft ring contacts the conical sealing surface of the bracket seat to form a first sealing point; A second sealing point is formed between the magnetic liquid sealing component and the shaft sleeve; A sealing ring is provided between the shaft sleeve and the sealing shaft to form a third sealing point; A sealing ring and a sealing gasket are provided between the lower end gland and the upper seat body to form a fourth sealing point; The conversion sealing device further comprises: two sets of packing seal assemblies, one set of packing seal assemblies is arranged between the upper seat body and the upper gland to form a fifth sealing point with the conversion sealing sleeve, and the other set of packing seal assemblies is arranged between the lower seat body and the lower gland to form a sixth sealing point with the conversion sealing sleeve; The bracket seat also has an upper end sealing surface, and a sealing ring and a sealing gasket are arranged between the lower seat body and the upper end sealing surface of the bracket seat to form a seventh sealing point; The upper end of the conversion sealing sleeve is provided with a guide pin, and the guide pin cooperates with the guide groove of the upper seat body to ensure that the conversion sealing sleeve can only move up and down, and the lower end of the conversion sealing sleeve is a pressing end; There is a gap between the inner wall of the conversion sealing sleeve and the sealing shaft, so that there is no interference between the inner wall of the conversion sealing sleeve and the sealing shaft when the crystallizer is stirring.

2. The adipic acid crystallizer stirring magnetic liquid seal online replacement device according to claim 1, characterized in that: The inner wall of the upper end of the upper seat body is provided with a gasket ring boss, and the lower end of the upper seat body is provided with a connecting flange; The upper gland has a positioning platform and a limiting groove, and the inner and outer walls of the upper gland are both provided with sealing rings; The packing seal assembly between the upper seat body and the upper gland includes a packing washer, a packing and a packing pressure ring; The packing washer, packing, and packing pressure ring between the upper seat body and the upper gland are arranged at the washer boss on the inner wall of the upper end of the upper seat body. The upper seat body, the packing washer, packing, packing pressure ring, and the upper gland are assembled in sequence. The upper gland is matched with the upper seat body through the positioning platform of the upper gland and is tightened with screws; The inner wall of the lower end of the lower seat body is provided with a gasket ring boss, the upper end of the lower seat body is provided with a support block, and the support block is provided with a screw thread hole; The lower gland has a positioning platform and a limiting groove, and the inner and outer walls of the lower gland are both provided with sealing rings; The packing seal assembly between the lower seat body and the lower gland includes a packing washer, packing and a packing pressure ring; The packing ring, packing, and packing pressure ring between the lower seat body and the lower gland are arranged on the ring boss on the inner wall of the lower end of the lower seat body; the packing pressure ring, packing, packing ring, and lower seat body between the lower gland are assembled in sequence, and the lower gland is matched with the lower seat body through the positioning platform of the lower gland and then tightened with screws; After the lower end of the upper seat body is positioned and matched with the upper end of the lower seat body, the connecting flange and the supporting block are fastened with screws to connect the upper seat body and the lower seat body.

3. The adipic acid crystallizer stirring magnetic liquid seal online replacement device according to claim 1, characterized in that: The side of the disc selector is provided with a dial hole, and the dial hole is used to dial the rotating disc selector; The upper and lower end surfaces of the disc nut are provided with bearing track grooves, which are respectively opposite to the bearing track groove at the lower end of the upper seat body and the bearing track groove at the upper end of the lower seat body; Thrust bearings are arranged between the disc selector and the lower end surface of the upper seat body and between the upper end surface of the lower seat body. The thrust bearings are set in the bearing track grooves of the disc selector, the upper seat body and the lower seat body to reduce the resistance when the disc selector rotates.

4. The adipic acid crystallizer stirring magnetic liquid seal online replacement device according to claim 3, characterized in that: The upper and lower end surfaces of the disc selector nut only contact the thrust bearing, and there are gaps between the disc selector nut and the lower end surface of the upper seat body, the lower end surface of the upper pressure cover, the upper end surface of the lower seat body, and the upper end surface of the lower pressure cover.

5. The adipic acid crystallizer stirring magnetic liquid seal online replacement device according to claim 1, characterized in that: The inner ring and the lower inclined surface of the shelf shaft ring are both provided with sealing rings. The side of the shelf shaft ring has a penetrating screw hole, and the sealing shaft has a screw hole. The shelf shaft ring is fixed to the sealing shaft by a hexagonal flat-end set screw. The first sealing point is formed between the lower inclined surface of the shelf shaft ring and the conical sealing surface of the bracket seat.

6. The adipic acid crystallizer stirring magnetic liquid seal online replacement device according to claim 1, characterized in that: The magnetic liquid sealing component includes a pole shoe and a magnet.

7. The adipic acid crystallizer stirring magnetic liquid seal online replacement device according to claim 1, characterized in that: A bearing support ring, a deep groove ball bearing, a spring retaining ring and a bearing washer are also sleeved between the shaft sleeve and the sealing seat.

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