Guide cylinder crystallizer
The servo motor-driven guide tube crystallizer uses a reciprocating screw and screw nut to push the inner and outer guide plates to expand and contract, which solves the problem of uneven crystal slurry mixing in the DTB crystallizer and achieves better uniform mixing of crystal slurry and control of product particle size.
Patent Information
- Application Number
- CN202520522399.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-03-24
AI Technical Summary
Existing DTB crystallizers exhibit inhomogeneity during crystal slurry mixing, leading to localized over-concentration and affecting the average particle size and particle size distribution of the product.
The guide tube crystallizer driven by a servo motor uses a reciprocating screw and screw nut to drive a connecting rod to expand and contract the inner and outer guide plates, thereby changing the diameter of the guide tube and achieving uniform mixing of the crystal slurry.
It effectively improves the local over-concentration phenomenon caused by uneven mixing of crystal slurry, and improves the average particle size uniformity and particle size distribution of the product.
Smart Images
Figure CN223959218U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of crystallization technology, and in particular to a flow guide tube crystallizer. Background Technology
[0002] The DTB crystallizer, also known as a flow-through crystallizer, is a typical internal circulation crystallizer consisting of a jacket and a flow-through cylinder. It is one of the continuous crystallization devices developed in recent years. This type of crystallizer can produce larger particles, has high production intensity, and is less prone to scaling inside the crystallizer. It has become one of the main forms of continuous crystallizers and can be used for vacuum cooling, evaporation, and direct contact freezing methods.
[0003] However, in some cases, the mixing of the crystal slurry in the existing DTB crystallizer may not be uniform enough, and there may be local over-concentration. This may result in a smaller average particle size and a wider particle size distribution of the product. Utility Model Content
[0004] To improve the problem of uneven mixing of crystal slurry and local over-concentration in DTB crystallizers, this application provides a flow guide tube crystallizer.
[0005] The guide tube crystallizer provided in this application adopts the following technical solution:
[0006] A flow guide tube crystallizer includes a tank body and a baffle fixed in the inner cavity of the tank body. A servo motor is provided at the top of the tank body. The servo motor is characterized in that: a drive shaft is fixed at the output end of the servo motor; a reciprocating lead screw is fixed in the middle of the drive shaft; a blade is fixed at the end of the drive shaft away from the servo motor; a lead screw nut is threaded to the outer ring of the reciprocating lead screw; a plurality of connecting rods are rotatably arranged on the outer ring of the lead screw nut; a plurality of inner guide plates with the same structure and installation method are fixed at the ends of the plurality of connecting rods away from the lead screw nut; and a plurality of outer guide plates with the same structure and installation method are slidably arranged on the outer side of the plurality of inner guide plates.
[0007] By adopting the above technical solution, the servo motor drives the drive shaft, reciprocating screw, and blade to rotate. Under the action of the reciprocating screw and screw nut, the connecting rod can push the inner guide plate and outer guide plate to slowly expand and contract, thereby changing the liquid pumped by the blade and achieving better mixing of the crystal slurry, preventing the phenomenon of excessive concentration.
[0008] Preferably, several outer rings with the same structure and spaced apart are fixed on the two ends of several outer guide plates, and several inner rings with the same structure and spaced apart are movably disposed through both ends of several outer rings.
[0009] By adopting the above technical solution, the inner and outer rings can work together to form a whole of several outer guide plates.
[0010] Preferably, two identical retraction grooves are provided on both sides of the outer arc surface at both ends of the inner guide plates. A spring is fixed in the middle of the inner cavity of the retraction groove, and a telescopic limiting post is fixed on the side of the spring away from the retraction groove, which slides against the outer guide plate.
[0011] By adopting the above technical solution, the limiting telescopic column can automatically achieve the telescopic function under the action of the spring.
[0012] Preferably, several T-shaped sliders with the same structure and symmetrical arrangement are fixed on the side surfaces of both ends of several inner guide plates. The T-shaped sliders slide relative to and limit each other with the outer guide plates.
[0013] By adopting the above technical solution, the T-shaped slider can limit the inner guide plate and the outer guide plate, thereby making the inner guide plate and the outer guide plate fit tightly together.
[0014] Preferably, two limiting grooves with the same structure and symmetrical to each other are provided on both sides of the inner arc surface at both ends of the outer guide plate, and the limiting grooves and the telescopic limiting post are mutually engaged and limited.
[0015] By adopting the above technical solution, the limiting groove can accommodate the telescopic limiting post when it is squeezed, so that it can freely realize the telescopic function.
[0016] Preferably, several T-shaped annular grooves with the same structure and located between two limiting grooves are formed on the inner arc surfaces at both ends of several outer guide plates, and the inner surface of the T-shaped annular groove and the outer surface of the T-shaped slider are slidably arranged relative to each other.
[0017] By adopting the above technical solution, the T-shaped annular groove and the T-shaped slider can be matched with each other and both can be made to have smooth surfaces. This not only limits each other but also increases the sliding effect, thereby reducing the wear caused by friction.
[0018] Preferably, the outer ring of the lead screw nut has several movable grooves with the same structure, all of which are rotatably connected to the connecting rod.
[0019] By adopting the above technical solution, the movable groove can connect the connecting rod and the lead screw nut without affecting the 180-degree rotation of the connecting rod.
[0020] Preferably, the end of the connecting rod away from the lead screw nut is rotatably provided with a movable seat that is fixedly connected to the inner arc surface of the inner guide plate.
[0021] By adopting the above technical solution, the movable seat can help connect the connecting rod to the inner guide plate without affecting the rotation of the connecting rod.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. The drive shaft drives the reciprocating screw to rotate, which in turn drives the screw nut to move back and forth and pushes the connecting rod. This causes the other end of the connecting rod to push the inner guide plate and the outer guide plate, so that the two guide plates slowly unfold. This changes the diameter of the guide tube formed by the inner and outer guide plates, thereby improving the local over-concentration phenomenon caused by uneven mixing of crystal slurry.
[0024] 2. By utilizing the T-shaped annular groove on the outer guide plate and the T-shaped slider on the inner guide plate to slide and limit each other, as well as the limiting telescopic column, the inner and outer guide plates can be tightly attached to each other when they expand outwards, and the slurry in the guide tube formed by the inner and outer guide plates will not flow outwards and affect the liquid circulation flow in the tank and baffle. Attached Figure Description
[0025] Figure 1 This is an overall schematic diagram of this application;
[0026] Figure 2 This is a cross-sectional view of the internal structure of this application;
[0027] Figure 3 This is a cross-sectional view of the guide tube in this application;
[0028] Figure 4 This is an enlarged view of the internal cross-sectional structure of the guide tube in this application;
[0029] Figure 5 This is an exploded view of the guide tube structure of this application.
[0030] Reference numerals: 1. Tank body; 2. Baffle; 3. Servo motor; 4. Drive shaft; 5. Blade; 6. Outer guide plate; 7. Inner guide plate; 8. Outer ring; 9. Reciprocating lead screw;
[0031] 10. Inner ring; 11. T-shaped ring groove; 12. T-shaped slider; 13. Limiting groove; 14. Telescopic limiting post; 15. Spring; 16. Retraction groove; 17. Lead screw nut; 18. Connecting rod; 19. Movable seat; 20. Movable groove. Detailed Implementation
[0032] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.
[0033] This application discloses a flow guide tube crystallizer.
[0034] Reference Figures 1-3A flow guide tube crystallizer includes a tank body 1 and a baffle 2 fixedly installed in the lower part of the inner cavity of the tank body 1. A servo motor 3 is installed at the top of the tank body 1. The output end of the servo motor 3 is fixedly connected to the upper end of the drive shaft 4. The end of the drive shaft 4 away from the servo motor 3 is fixedly connected to the upper end of the blade 5. A reciprocating screw 9 is fixedly installed through the middle of the drive shaft 4, so that the output shaft of the servo motor 3 rotates and drives the drive shaft 4 to rotate, thereby driving the blade 5 and the reciprocating screw 9 to rotate together. A screw nut 17 is threaded through the outer ring surface of the reciprocating screw 9, and several movable grooves 20 with the same structure are opened on the outer ring of the screw nut 17.
[0035] Reference Figures 1-3 The connecting rod 18 is rotatably connected to one end of the connecting rod 18 in the middle of the inner cavity of the movable groove 20, and the movable grooves 20 all penetrate the outer ring of the lead screw nut 17, so that the connecting rod 18 can rotate 180 degrees in the movable groove 20. The end of the connecting rod 18 away from the lead screw nut 17 is rotatably connected to the movable end of the movable seat 19, and the fixed end of the movable seat 19 is fixed to the middle of the inner arc surface of the inner guide plate 7. Several outer guide plates 6 are slidably arranged on the outer ring surface of the several inner guide plates 7, and the structure and installation method of the several outer guide plates 6 are the same. The several inner guide plates 7 and several outer guide plates 6 are arranged around each other, thus forming a complete guide tube.
[0036] It should be noted that the tank body 1, baffle 2, servo motor 3, reciprocating screw 9, and blade 5 are all existing mechanisms, and their structural principles will not be elaborated here. Furthermore, the tank body 1 also needs to be connected to other heating and cooling structures, and the servo motor 3 also needs to be connected to PLC and other controllers. However, since these are existing mechanisms, their structural principles will not be detailed here.
[0037] As the output of the servo motor 3 rotates, it drives the drive shaft 4, which is fixed to it, to rotate. While the drive shaft 4 rotates, it drives the reciprocating screw 9 and the blade 5, which are fixed to the middle and lower parts, to rotate synchronously. When the reciprocating screw 9 rotates, it drives the screw nut 17 to move longitudinally back and forth. When the screw nut 17 moves longitudinally back and forth, it pushes several connecting rods 18, which are rotated on the outer ring of the screw nut 17, in the direction of its outer ring. This causes the connecting rods 18 to push the outer guide plate 6, which is fixedly connected to it through the movable seat 19.
[0038] When the outer guide plate 6 is pushed, it will push several inner guide plates 7 that are slidably set on its outer arc surface to unfold outward together, thereby changing the inner diameter of the entire guide tube. When the connecting rod 18 is parallel to the lead screw nut 17, the combined length of the connecting rod 18, the lead screw nut 17, and the movable seat 19 is the same as the maximum inner diameter of the outer guide plate 6 and the inner guide plate 7 when unfolded. The outer diameter of the outer guide plate 6 and the inner guide plate 7 should be smaller than the inner diameter of the baffle 2 so as not to affect the water circulation in the inner cavity of the tank 1.
[0039] Reference Figures 3-5 Several outer rings 8 are fixedly provided on the upper and lower surfaces of several outer guide plates 6. The outer rings 8 have the same structure and are spaced apart from each other. Several inner rings 10 are provided at the middle of both ends of several outer rings 8. The inner rings 10 can move through the outer rings 8. The inner rings 10 have the same structure and are spaced apart from the outer rings 8.
[0040] Reference Figures 3-5 Furthermore, retraction grooves 16 are provided on both sides of the upper and lower outer arc surfaces of several inner guide plates 7. These retraction grooves 16 are identical in structure and symmetrical to each other. A spring 15 is fixedly installed within the inner cavity of each retraction groove 16. The end of the spring 15 furthest from the retraction groove 16 is fixedly connected to the side surface of the telescopic limiting post 14. The side surface of the telescopic limiting post 14, which is fixedly connected to the spring 15, is slidably connected to the side wall of the inner cavity of the retraction groove 16. The telescopic limiting post 14 is inserted into the retraction groove 16, and the surface of the telescopic limiting post 14 away from the retraction groove 16 is slidably disposed with respect to the inner arc surface of the outer guide plate 6. Limiting grooves 13 are provided on both sides of the upper and lower inner arc surfaces of the outer guide plate 6. The upper and lower limiting grooves 13 are not only identical in structure but also symmetrical to each other. The limiting grooves 13 can lock and limit the telescopic limiting post 14, so that the inner guide plate 7 and the outer guide plate 6 will not separate when they are deployed.
[0041] Reference Figures 3-5 T-shaped sliders 12 are fixedly installed on both sides of the upper and lower surfaces of several inner guide plates 7. The four T-shaped sliders 12 have the same structure and are symmetrical to each other. T-shaped annular grooves 11 are opened on the upper and lower inner arc surfaces of several outer guide plates 6. The T-shaped annular grooves 11 at the upper and lower ends have the same structure and are located between two limiting grooves 13. The T-shaped sliders 12 fixed at the upper and lower ends of the inner guide plates 7 and the outer guide plates 6 opened at the upper and lower ends of the outer guide plates 6 are all made with smooth surfaces. The T-shaped sliders 12 and the T-shaped annular grooves 11 slide and limit each other.
[0042] The outer guide plate 6 is fixed with an outer ring 8 and an inner ring 10 at its upper end, which can form several outer guide plates 6 into a whole. The T-shaped slider 12 and the T-shaped ring groove 11 are slidably set and mutually limit each other, so that when the outer guide plate 6 and the inner guide plate 7 are tightly attached together, it does not affect the sliding and unfolding between the outer guide plate 6 and the inner guide plate 7. At the same time, the telescopic limiting post 14 abuts against the inner ring surface of the outer guide plate 6 when the outer guide plate 6 and the inner guide plate 7 slide, which can play a certain sealing role. The telescopic limiting post 14 also has a sealing effect when it is engaged and limited by the limiting groove 13. In this way, the liquid inside the outer guide plate 6 and the inner guide plate 7 will flow out and interfere with the liquid outside the outer guide plate 6 and the inner guide plate 7, causing uneven mixing on site.
[0043] As the outer guide plate 6 and inner guide plate 7 are pushed outward, the circle formed by the outer ring 8 and inner ring 10 expands. However, the outer ring 8 and inner ring 10 limit each other, and the expanded diameter is consistent with the expanded diameter of the outer guide plate 6 and inner guide plate 7. While the outer guide plate 6 and inner guide plate 7 expand, they can also drive the T-shaped slider 12 to slide in the T-shaped ring groove 11 to prevent the outer guide plate 6 and inner guide plate 7 from separating due to sliding, thus failing to form a complete guide tube. When the telescopic limiting post 14 slides to the limiting groove 13, the telescopic limiting post 14 is squeezed out by the outer guide plate 6, and then the compressed spring 15 rebounds, pushing the telescopic limiting post 14 out of the retraction groove 16 and engaging with the limiting groove 13 for limitation.
[0044] The implementation principle of a flow guide tube crystallizer in this application embodiment is as follows: by controlling the output end of the servo motor 3 to rotate, the drive shaft 4, the reciprocating screw 9 and the blade 5 are driven to rotate synchronously. When the reciprocating screw 9 rotates, the drive screw nut 17 moves longitudinally back and forth in the middle of the flow guide tube composed of the outer flow guide plate 6 and the inner flow guide plate 7. When the screw nut 17 moves longitudinally back and forth, it pushes the connecting rod 18 in the outer ring direction, thereby causing the connecting rod 18 to push the outer flow guide plate 6. When the outer flow guide plate 6 is pushed, it will push the inner flow guide plate 7 to unfold outward together.
[0045] At the same time, when the outer guide plate 6 and the inner guide plate 7 expand outward, they will drive the outer ring 8 and the inner ring 10 to expand outward. Simultaneously, they can drive the T-shaped slider 12 to slide in the T-shaped ring groove 11, preventing the outer guide plate 6 and the inner guide plate 7 from separating due to sliding, thus failing to form a complete guide tube. When the telescopic limiting post 14 slides to the limiting groove 13, the pressure between the outer guide plate 6 and the inner guide plate 7 on the telescopic limiting post 14 disappears, and the compressed spring 15 rebounds, pushing the telescopic limiting post 14 out of the retraction groove 16 and engaging with the limiting groove 13 for limitation. This changes the inner diameter of the guide tube formed by the outer guide plate 6 and the inner guide plate 7, thereby improving the local over-concentration phenomenon caused by uneven crystal slurry mixing.
[0046] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.
Claims
1. A flow guide tube crystallizer, comprising a tank (1) and a baffle (2) fixedly disposed in the inner cavity of the tank (1), wherein a servo motor (3) is disposed on the top of the tank (1), characterized in that: The output end of the servo motor (3) is fixed with a drive shaft (4), the middle of the drive shaft (4) is fixed with a reciprocating lead screw (9), the end of the drive shaft (4) away from the servo motor (3) is fixed with a blade (5), the outer ring of the reciprocating lead screw (9) is threaded with a lead screw nut (17), the outer ring of the lead screw nut (17) is rotatably provided with several connecting rods (18), the ends of the several connecting rods (18) away from the lead screw nut (17) are fixed with several inner guide plates (7) with the same structure and installation method, and the outer side of the several inner guide plates (7) is slidably provided with several outer guide plates (6) with the same structure and installation method.
2. The guide tube crystallizer according to claim 1, characterized in that: Several outer outer rings (8) with the same structure and spaced apart are fixed on the two ends of several outer guide plates (6), and several inner rings (10) with the same structure and spaced apart are movably inserted through both ends of several outer outer rings (8).
3. The guide tube crystallizer according to claim 1, characterized in that: Two identical retraction grooves (16) are provided on both sides of the outer arc surface at both ends of the inner guide plate (7). A spring (15) is fixed in the middle of the inner cavity of the retraction groove (16). A telescopic limiting post (14) that slides with the outer guide plate (6) is fixed on the side of the spring (15) away from the retraction groove (16).
4. A flow guide tube crystallizer according to claim 1, characterized in that: Several T-shaped sliders (12) with the same structure and symmetrical arrangement are fixed on the side surfaces of both ends of several inner guide plates (7). The T-shaped sliders (12) slide and limit each other with the outer guide plate (6).
5. A flow guide tube crystallizer according to claim 1, characterized in that: The outer guide plate (6) has two limiting grooves (13) with the same structure and symmetrical to each other on both sides of the inner arc surface at both ends. The limiting grooves (13) and the telescopic limiting post (14) are mutually locked and limited.
6. A flow guide tube crystallizer according to claim 1, characterized in that: Several T-shaped annular grooves (11) with the same structure and located between two limiting grooves (13) are provided on the inner arc surfaces at both ends of several outer guide plates (6). The inner surface of the T-shaped annular groove (11) and the outer surface of the T-shaped slider (12) are slidably arranged to slide against each other.
7. A flow guide tube crystallizer according to claim 1, characterized in that: The outer ring of the lead screw nut (17) has several movable grooves (20) with the same structure, all of which are rotatably connected to the connecting rod (18).
8. A flow guide tube crystallizer according to claim 1, characterized in that: The connecting rod (18) is rotatably provided with a movable seat (19) at the end away from the lead screw nut (17) and fixed to the inner arc surface of the inner guide plate (7).