Rotary seal structure for automatic feeding and discharging of lithium hexafluorophosphate crystallizer

Abstract

The application discloses a rotary sealing structure for automatic feeding and discharging of a lithium hexafluorophosphate crystallizer, which comprises a feeding bottom pipe, the outer surface of the top of the feeding bottom pipe is fixedly provided with a first flange, two type-IV grooves arranged inside and outside are formed in the top of the first flange, an annular rubber pad is arranged on the top of the first flange, the bottom of the annular rubber pad is fixedly connected with two annular rubber strips arranged inside and outside, the height of the annular rubber strip is greater than the upper half of the type-IV groove, the bottom of each annular rubber strip is fixedly connected with four herringbone soft strips arranged in a ring shape, and a plurality of annular grooves arranged inside and outside are formed in the top of the annular rubber pad. The annular rubber pad used for sealing can be effectively prevented from easily falling off between the feeding bottom pipe and the first flange, meanwhile, the annular rubber pad does not hinder the dismounting, and when the annular rubber pad is dismounted, a certain spacing is formed between the annular rubber pad and the first flange, so that the annular rubber pad is conveniently peeled off upwards.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic geared motor technology, specifically to a rotary sealing structure for automatic feeding and discharging of lithium hexafluorophosphate crystallizers. Background Technology

[0002] Industrial synthesis methods for lithium hexafluorophosphate include wet, dry, and solvent methods. The solvent method requires crystallization and drying of the mother liquor of lithium hexafluorophosphate to obtain the product. Crystallization of lithium hexafluorophosphate typically involves passing a mixture of phosphorus pentafluoride and hydrogen chloride into hydrogen fluoride and lithium fluoride, reacting them under specific temperature and pressure to produce a lithium hexafluorophosphate solution. Crystallization of this solution precipitates lithium hexafluorophosphate in crystalline form. A crystallizer is required during the crystallization process. A crystallizer is a common chemical equipment primarily used to promote crystal formation. It promotes crystal growth and expansion by providing a fixed crystallization interface, thereby improving crystal quality and yield. In chemical reactions, crystallizers not only reduce impurities and turbidity in the solution but also improve the morphology, size, and crystallinity of crystals, better meeting the needs of actual industrial production. Because lithium hexafluorophosphate hydrolyzes upon contact with moisture in the air, crystallization must be carried out in a closed environment; therefore, the inlet and outlet of the crystallizer must be sealed.

[0003] In existing rotary sealing structures, the sealing ring between the upper and lower flanges is usually in a movable state. As a result, the sealing ring is likely to fall off every time it is disassembled and reassembled, which significantly affects the efficiency of sealing assembly. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary sealing structure for automatic feeding and discharging of lithium hexafluorophosphate crystallizers, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rotary sealing structure for automatic feeding and discharging of a lithium hexafluorophosphate crystallizer, comprising a feed bottom pipe, a first flange fixedly fitted on the outer surface of the top of the feed bottom pipe, two L-shaped grooves arranged internally and externally on the top of the first flange, an annular rubber gasket placed on the top of the first flange, two annular rubber strips arranged internally and externally fixedly connected to the bottom of the annular rubber gasket, and the bottom of the annular rubber strips extending into the interior of the L-shaped grooves, the height of the annular rubber strips being greater than the upper half of the L-shaped grooves, four herringbone-shaped flexible strips evenly arranged in a ring fixedly connected to the bottom of each of the two annular rubber strips, a plurality of annular grooves arranged internally and externally on the top of the annular rubber gasket, a connecting pipe provided above the feed bottom pipe, a second flange fixedly installed on the outer surface of the bottom of the connecting pipe, an auxiliary sealing gasket installed at the bottom of the connecting pipe and the second flange, a plurality of rubber clips arranged internally and externally fixedly connected to the bottom of the auxiliary sealing gasket, and the outer surface of the rubber clips fitting against the inner wall of the annular grooves.

[0006] Preferably, a sealing inner ring is fixedly connected to the top of the annular rubber pad, and the outer surface of the sealing inner ring is in contact with the inner wall of the auxiliary sealing pad and the connecting tube. A bent sealing ring is fixedly connected to the bottom of the annular rubber pad, and a straight conduit is fixedly connected to the inner wall of the connecting tube, and the outer surface of the straight conduit is in contact with the inner wall of the sealing inner ring, the annular rubber pad and the bent sealing ring in sequence.

[0007] Preferably, an annular groove is provided between the top and the inner wall of the feed bottom pipe, and a threaded ring is fixedly installed on the bottom wall of the annular groove.

[0008] Preferably, a spring base is threaded onto the outer surface of the threaded ring, a telescopic spring is fixedly connected to the top of the spring base, and a spring top seat is fixedly connected to the inner wall of the top of the telescopic spring.

[0009] Preferably, an annular ring is fixedly installed on the top of the spring top seat, and an irregularly shaped annular groove is opened on the top of the annular ring. Several evenly arranged circular steel balls are placed on the inner wall of the irregularly shaped annular groove.

[0010] Preferably, an L-shaped connecting strip is fitted inside the irregular annular groove, and the bottom of the L-shaped connecting strip has an arc-shaped groove, with the top wall of the arc-shaped groove fitting against the top of several circular steel balls.

[0011] Preferably, the top of the L-shaped connecting strip is provided with several drag-reducing steel balls arranged in a ring on both sides, and the top of the drag-reducing steel balls is in contact with the inner wall of the irregular ring groove.

[0012] Preferably, an integral steel ring is fixedly installed on the top of the L-shaped connecting strip, and the outer wall and top of the integral steel ring are respectively attached to the inner wall of the feed bottom pipe and the outer surface of the bent sealing ring. An annular fitting groove is opened on the inner wall of the integral steel ring, and a rubber plug ring is fixedly connected to the outer surface of the bent sealing ring, and the outer surface of the rubber plug ring extends into the interior of the annular fitting groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In this invention, the annular rubber gasket is connected to the first flange and the feed bottom pipe via an annular rubber strip and a herringbone flexible strip. The herringbone flexible strip is squeezed into the interior of the T-shaped groove. When the herringbone flexible strip is fully inserted into the wider lower half of the T-shaped groove, the squeezing force on the herringbone flexible strip is released, and it can return to its original shape inside the T-shaped groove. This restores the distance between its two outer walls to a state greater than the distance between the two inner walls of the upper half of the T-shaped groove. This effectively prevents the annular rubber gasket used for sealing from easily detaching from the feed bottom pipe and the first flange. At the same time, due to the plasticity of the herringbone flexible strip, when a large upward pulling force is applied to the annular rubber gasket, it can also cause it to detach from the first flange. Therefore, it does not hinder the disassembly of the annular rubber gasket from the first flange.

[0015] In this invention, an inner sealing ring is added to seal the gap between the annular rubber gasket and the auxiliary sealing gasket. The gap of the inner sealing ring is isolated by a straight conduit. This prevents the material introduced into the lithium hexafluorophosphate crystallizer from the connecting pipe from coming into contact with the sealing ring, the annular rubber gasket, the auxiliary sealing gasket, and the bent sealing ring. This further reduces the probability of leakage and prevents the rubber material from being corroded by the material, thus improving its service life.

[0016] In this invention, when the telescopic spring is not subjected to compressive force and the connecting pipe is not combined with the feed bottom pipe, the bottom of the annular rubber pad can have a certain distance from the top of the first flange, which facilitates the subsequent upward peeling of the annular rubber pad. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the installation structure of the annular rubber gasket and the sealing inner ring of the present invention;

[0019] Figure 3 This is a schematic diagram of the installation structure of the annular rubber pad and the annular rubber strip of the present invention;

[0020] Figure 4 This is a schematic diagram of the installation structure of the spring base and the telescopic spring of the present invention;

[0021] Figure 5For the present invention Figure 1 Schematic diagram of the structure at point A;

[0022] Figure 6 This is a schematic diagram showing the disassembled structure of the annular ring and the L-shaped connecting strip of the present invention;

[0023] Figure 7 This is a schematic diagram showing the disassembled structure of the feed bottom tube and the threaded ring of the present invention;

[0024] Figure 8 This is a schematic diagram showing the disassembled structure of the threaded ring and spring base of the present invention.

[0025] In the diagram: 1. Feed bottom pipe; 2. First flange; 3. T-shaped groove; 4. Annular rubber gasket; 5. Annular rubber strip; 6. Herringbone flexible strip; 7. Annular groove; 8. Connecting pipe; 9. Second flange; 10. Auxiliary sealing gasket; 11. Sealing inner ring; 12. Bending sealing ring; 13. Straight guide pipe; 14. Annular groove; 15. Threaded ring; 16. Spring base; 17. Telescopic spring; 18. Spring top seat; 19. Annular ring; 20. Irregular annular groove; 21. Circular steel ball; 22. T-shaped connecting strip; 23. Drag-reducing steel ball; 24. Integrated steel ring; 25. Rubber plug ring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Please see Figures 1-8 One embodiment provided by the present invention:

[0030] A rotary sealing structure for automatic feeding and discharging of a lithium hexafluorophosphate crystallizer includes a feed bottom pipe 1. A first flange 2 is fixedly fitted on the outer surface of the top of the feed bottom pipe 1. Two L-shaped grooves 3 arranged internally and externally are opened on the top of the first flange 2. An annular rubber gasket 4 is placed on the top of the first flange 2. Two annular rubber strips 5 arranged internally and externally are fixedly connected to the bottom of the annular rubber gasket 4, and the bottom of the annular rubber strips 5 extends into the interior of the L-shaped grooves 3. The height of the annular rubber strips 5 is greater than the upper half of the L-shaped grooves 3. Four herringbone-shaped flexible strips 6 are fixedly connected to the bottom of each of the two annular rubber strips 5. Several annular grooves 7 arranged internally and externally are opened on the top of the annular rubber gasket 4. A connecting pipe 8 is provided above the feed bottom pipe 1. A second flange 9 is fixedly installed on the outer surface of the bottom of the connecting pipe 8. An auxiliary sealing gasket 10 is installed at the bottom of the connecting pipe 8 and the second flange 9. Several rubber clips arranged internally and externally are fixedly connected to the bottom of the auxiliary sealing gasket 10, and the outer surface of the rubber clips is in contact with the inner wall of the annular grooves 7.

[0031] In this structure, by placing the annular rubber pad 4 above the first flange 2, and during the downward movement of the annular rubber pad 4, a compressive force is applied to the herringbone flexible strip 6, causing the distance between the outer walls on both sides of its bottom to be less than or equal to the distance between the two inner walls of the upper half of the T-shaped groove 3. This allows the herringbone flexible strip 6 to be easily inserted into the interior of the T-shaped groove 3. When the herringbone flexible strip 6 is fully inserted into the wider lower half of the T-shaped groove 3, the compressive force on the herringbone flexible strip 6 is released, and it can return to its original shape within the space of the T-shaped groove 3, allowing its outer walls to... The spacing between them is restored to a state greater than the spacing between the two inner walls of the upper half of the T-shaped groove 3, which can effectively prevent the annular rubber gasket 4 used for sealing from easily falling off from the feed bottom pipe 1 and the first flange 2. At the same time, due to the plasticity of the herringbone soft strip 6, when a large upward pulling force is applied to the annular rubber gasket 4, it can also cause it to fall off and contact the first flange 2. In addition, when the connecting pipe 8 and the feed bottom pipe 1 are combined, the auxiliary sealing gasket 10 is attached to the top of the annular rubber gasket 4, and the rubber strip can fit with the annular groove 7 to form a labyrinthine combination, which improves the sealing effect of the two.

[0032] A sealing inner ring 11 is fixedly connected to the top of the annular rubber gasket 4, and the outer surface of the sealing inner ring 11 is in contact with the inner wall of the auxiliary sealing gasket 10 and the connecting pipe 8. A bent sealing ring 12 is fixedly connected to the bottom of the annular rubber gasket 4. A straight conduit 13 is fixedly connected to the inner wall of the connecting pipe 8, and the outer surface of the straight conduit 13 is in contact with the inner wall of the sealing inner ring 11, the annular rubber gasket 4 and the bent sealing ring 12 in sequence.

[0033] In this structure, based on the annular rubber gasket 4, a sealing inner ring 11 is added to seal the gap between the annular rubber gasket 4 and the auxiliary sealing gasket 10, further improving the sealing effect. In addition, the gap of the sealing inner ring 11 is isolated by the straight conduit 13, preventing the material introduced into the lithium hexafluorophosphate crystallizer from the connecting pipe 8 from contacting the sealing inner ring 11, the annular rubber gasket 4, the auxiliary sealing gasket 10 and the bent sealing ring 12, so as to further reduce the probability of leakage and prevent the rubber material from being corroded by the material, thereby improving its service life.

[0034] An annular groove 14 is formed between the top and inner wall of the feed bottom pipe 1. A threaded ring 15 is fixedly installed on the bottom wall of the annular groove 14. A spring base 16 is threaded onto the outer surface of the threaded ring 15. A telescopic spring 17 is fixedly connected to the top of the spring base 16. A spring top seat 18 is fixedly connected to the inner wall of the top of the telescopic spring 17. An annular ring 19 is fixedly installed on the top of the spring top seat 18. An irregular annular groove 20 is formed on the top of the annular ring 19. Several evenly arranged circular steel balls 21 are placed on the inner wall of the irregular annular groove 20. An L-shaped connecting strip 22 is fitted inside the irregular annular groove 20. An arc-shaped part is formed at the bottom of the L-shaped connecting strip 22. The groove has an arc-shaped groove top wall that fits against the top of several circular steel balls 21. Several drag-reducing steel balls 23 are arranged in a ring on both sides of the top of the L-shaped connecting strip 22. The top of the drag-reducing steel balls 23 fits against the inner wall of the irregular ring groove 20. An integral steel ring 24 is fixedly installed on the top of the L-shaped connecting strip 22. The outer wall and top of the integral steel ring 24 fit against the inner wall of the feed bottom pipe 1 and the outer surface of the bent sealing ring 12, respectively. An annular fitting groove is opened on the inner wall of the integral steel ring 24. A rubber plug ring 25 is fixedly connected to the outer surface of the bent sealing ring 12. The outer surface of the rubber plug ring 25 extends into the interior of the annular fitting groove.

[0035] During assembly, the combined structure, consisting of a telescopic spring 17, a spring top seat 18, a spring base 16, an annular ring 19, a T-shaped connecting strip 22, and an integrated steel ring 24, is threaded onto the outer surface of the threaded ring 15. This ensures a secure connection between the combined structure and the feed bottom pipe 1. This assembly method also allows for disassembly of the combined structure and the feed bottom pipe 1, facilitating replacement of damaged components. Then, the bent sealing ring 12 is aligned with the top and inner side of the integrated steel ring 24 and moved downwards to cause them to overlap. During this process, the bent sealing ring 12 and the rubber insertion ring 25 deform under pressure, thereby causing the rubber insertion ring... The outer surface of ring 25 extends into the interior of the annular fitting groove, increasing the connection between the bent sealing ring 12 and the integral steel ring 24, thereby further improving the firmness of the combination between the annular rubber pad 4 and the first flange 2. When the telescopic spring 17 is not subjected to compressive force and the connecting pipe 8 is not combined with the feed bottom pipe 1, the bottom of the annular rubber pad 4 can have a certain gap with the top of the first flange 2, which facilitates the subsequent upward peeling of the annular rubber pad 4. In addition, the circular steel ball 21 and the drag-reducing steel ball 23 work together to reduce the friction resistance, reducing the frictional resistance received by the T-shaped connecting strip 22 when rotating and calibrating the relative position of the annular rubber pad 4 and the first flange 2.

[0036] Working principle: By threading a combined structure consisting of a telescopic spring 17, a spring top seat 18, a spring base 16, an annular ring 19, a T-shaped connecting strip 22, and an integrated steel ring 24 onto the outer surface of the threaded ring 15, this combined structure is firmly connected to the feed bottom pipe 1. Then, by placing the annular rubber gasket 4 above the first flange 2 and applying pressure to the herringbone flexible strip 6 as it moves downwards, the distance between its two outer walls at the bottom is made less than or equal to the distance between the two inner walls of the upper half of the T-shaped groove 3. This allows the herringbone flexible strip 6 to be easily inserted into the T-shaped groove 3. When the herringbone flexible strip 6 is fully inserted into the wider lower half of the T-shaped groove 3, the pressure on it is released, and it returns to its original shape within the T-shaped groove 3. This restores the distance between its two outer walls to a state greater than the distance between the two inner walls of the upper half of the T-shaped groove 3, effectively preventing the annular rubber gasket 4 used for sealing from contacting the feed bottom pipe 1. The material bottom pipe 1 and the first flange 2 easily detach. During this process, the bent sealing ring 12 is aligned with the top and inner side of the integrated steel ring 24. The bent sealing ring 12 and the rubber plug ring 25 deform under pressure, causing the outer surface of the rubber plug ring 25 to extend into the interior of the annular fitting groove. In addition, when the connecting pipe 8 and the feed bottom pipe 1 are combined, the auxiliary sealing gasket 10 is attached to the top of the annular rubber gasket 4, and the rubber clip can fit with the annular groove 7 to form a labyrinthine combination, which improves the sealing effect of the two. On this basis, the gap between the annular rubber gasket 4 and the auxiliary sealing gasket 10 is sealed by adding a sealing inner ring 11. In addition, the gap of the sealing inner ring 11 is isolated by the straight conduit 13 to prevent the material introduced into the lithium hexafluorophosphate crystallizer from the connecting pipe 8 from contacting the sealing inner ring 11, the annular rubber gasket 4, the auxiliary sealing gasket 10 and the bent sealing ring 12, so as to further reduce the probability of leakage and avoid the rubber material from being corroded by the material, thereby improving its service life.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rotary sealing structure for automatic feeding and discharging of a lithium hexafluorophosphate crystallizer, comprising a feed bottom pipe (1), characterized in that: The top outer surface of the feed bottom pipe (1) is fixedly fitted with a first flange (2). The top of the first flange (2) has two inner and outer T-shaped grooves (3). An annular rubber pad (4) is placed on the top of the first flange (2). The bottom of the annular rubber pad (4) is fixedly connected to two inner and outer annular rubber strips (5), and the bottom of the annular rubber strips (5) extends into the interior of the T-shaped grooves (3). The height of the annular rubber strips (5) is greater than the upper half of the T-shaped grooves (3). The bottoms of the two annular rubber strips (5) are fixed. Four herringbone-shaped flexible strips (6) are connected in a ring and are evenly arranged. The top of the ring rubber pad (4) is provided with several annular grooves (7) arranged inside and outside. A connecting pipe (8) is provided above the feed bottom pipe (1). A second flange (9) is fixedly installed on the outer surface of the bottom of the connecting pipe (8). An auxiliary sealing gasket (10) is installed at the bottom of the connecting pipe (8) and the second flange (9). Several rubber clips arranged inside and outside are fixedly connected to the bottom of the auxiliary sealing gasket (10), and the outer surface of the rubber clips is in contact with the inner wall of the annular groove (7). An annular groove (14) is provided between the top and the inner wall of the feed bottom pipe (1). A threaded ring (15) is fixedly installed on the bottom wall of the annular groove (14). A spring base (16) is threaded on the outer surface of the threaded ring (15). A telescopic spring (17) is fixedly connected to the top of the spring base (16). A spring top seat (18) is fixedly connected to the inner wall of the top of the telescopic spring (17). An annular ring (19) is fixedly installed on the top of the spring top seat (18). A shaped annular groove (20) is provided on the top of the annular ring (19). Several evenly arranged circular steel balls (21) are placed on the inner wall of the shaped annular groove (20). The irregular annular groove (20) is fitted with a T-shaped connecting strip (22). The bottom of the T-shaped connecting strip (22) is provided with an arc-shaped groove, and the top wall of the arc-shaped groove is in contact with the top of several round steel balls (21). Several drag-reducing steel balls (23) are arranged in a ring on both sides of the top of the T-shaped connecting strip (22), and the top of the drag-reducing steel balls (23) is in contact with the inner wall of the irregular annular groove (20). An integral steel ring (24) is fixedly installed on the top of the L-shaped connecting strip (22), and the outer wall and top of the integral steel ring (24) are respectively attached to the inner wall of the feed bottom pipe (1) and the outer surface of the bent sealing ring (12). An annular fitting groove is opened on the inner wall of the integral steel ring (24), and a rubber plug ring (25) is fixedly connected to the outer surface of the bent sealing ring (12), and the outer surface of the rubber plug ring (25) extends into the interior of the annular fitting groove.

2. The rotary sealing structure for automatic feeding and discharging of a lithium hexafluorophosphate crystallizer according to claim 1, characterized in that: The top of the annular rubber pad (4) is fixedly connected to a sealing inner ring (11), and the outer surface of the sealing inner ring (11) is in contact with the inner wall of the auxiliary sealing pad (10) and the connecting tube (8). The bottom of the annular rubber pad (4) is fixedly connected to a bent sealing ring (12), and the inner wall of the connecting tube (8) is fixedly connected to a straight conduit (13), and the outer surface of the straight conduit (13) is in contact with the inner wall of the sealing inner ring (11), the annular rubber pad (4) and the bent sealing ring (12) in sequence.

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