A bidirectional spiral stirring device

Abstract

This utility model relates to the field of mixing device technology, specifically to a bidirectional spiral mixing device, including a vessel body, a vessel lid installed on the vessel body for sealing, a mixing paddle mechanism located inside the vessel body for mixing materials, a connecting seat installed on the vessel lid, a base installed on the connecting seat, and a motor installed on the base for driving the mixing paddle mechanism to rotate. The device achieves flexible switching of the paddle angle through a coaxial transmission mechanism driven by an internal adjusting shaft on the main shaft. This allows for changing the material flow direction (e.g., free conversion between "center rising / edge falling" and "center falling / edge rising" flow patterns) simply by adjusting the paddle angle without changing the direction of the drive shaft. This significantly improves the device's adaptability to complex working conditions such as viscosity changes and reaction stage switching. Simultaneously, the integrated coaxial transmission structure ensures the accuracy of angle adjustment and operational stability.

Description

Technical Field

[0001] This utility model relates to the technical field of stirring devices, specifically a bidirectional spiral stirring device. Background Technology

[0002] Reactors are core containers used in chemical and pharmaceutical industries for material mixing, reaction, or heat transfer. Their sealed structure provides a safe and controllable environment for the process. However, to achieve full and uniform mixing of materials inside the reactor, or to ensure efficient contact of reactants and effective heat transfer, relying solely on the reactor body is far from sufficient. This necessitates the introduction of a key internal component—the stirring device. The stirring device actively promotes material flow, shearing, and circulation through the rotational motion of impellers (such as paddle, turbine, and propeller impellers).

[0003] The stirring device is a core component for ensuring the uniformity and efficiency of the process within the reactor. Its structure and selection directly affect the final result, but it still has certain problems: 1) Fixed blades result in a single flow field, making it difficult to optimize reaction uniformity; 2) Existing structures cannot quickly respond to the dynamic requirements of convection patterns for materials of different viscosities or reaction stages in a single device; 3) Traditional technologies require changing the direction of the drive shaft to switch the material flow direction, leading to frequent start-ups, shutdowns, or reversals of the motor, significantly increasing energy consumption. Therefore, in view of the above situation, there is an urgent need to develop a bidirectional spiral stirring device to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0004] The purpose of this invention is to provide a bidirectional spiral stirring device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bidirectional spiral stirring device, comprising a vessel body, a vessel cover installed on the vessel body for sealing, a stirring paddle mechanism located inside the vessel body for stirring materials, a connecting seat installed on the vessel cover, a base installed on the connecting seat, and a motor installed on the base for driving the stirring paddle mechanism to rotate.

[0006] The stirring paddle mechanism includes a drive shaft passing through the middle of the connecting seat and the vessel body, a main shaft installed at the bottom of the drive shaft, and several sets of paddle assemblies horizontally installed on the main shaft for stirring materials.

[0007] The spindle is hollow inside, and an adjusting shaft is rotatably installed inside the spindle. Several bevel gears a are sleeved on the adjusting shaft.

[0008] The blade assembly includes a stirring shaft mounted on the main shaft, blades mounted on the stirring shaft, and a transmission module installed inside the stirring shaft for driving the blades to change angle.

[0009] The transmission module includes a transmission shaft a, a transmission shaft b, sleeves, bearings, and transmission components. Transmission shafts a and b are rotatably mounted inside the stirring shaft via bearings. A bevel gear b is mounted on one end of transmission shaft a near the adjusting shaft, and a bevel gear c is mounted on the other end of transmission shaft a. A bevel gear e is mounted on one end of transmission shaft b near transmission shaft a. A bevel gear d is mounted between bevel gear c and bevel gear e. Bevel gear e and bevel gear c are connected by bevel gear d. Several sleeves are fitted onto transmission shafts a and b. Transmission components are embedded in the outer wall of the sleeves. Bolt holes for connecting with transmission components are provided on the blades.

[0010] In practical use, the adjustment shaft inside the main shaft is manually rotated to drive bevel gear a, which in turn drives bevel gears b, c, d, and e in the transmission module. This causes the transmission components to rotate the blades in the opposite direction, allowing for flexible switching of the blade angle without changing the direction of the drive shaft. This enables the free selection of two mixing flow patterns: "center material rises / edge material falls" or "center material falls / edge material rises." This significantly improves adaptability to different material characteristics and reaction stages, optimizes mixing efficiency and reaction uniformity, simplifies the operation process, and reduces energy consumption.

[0011] Preferably, the side of the connecting seat is provided with a horizontal through groove a, and the top outer wall of the drive shaft is provided with a horizontal through groove b.

[0012] Preferably, the top end of the adjusting shaft is located in the middle of the through groove b, and a knob is fitted on the top end of the adjusting shaft.

[0013] In practical use, when slot a and slot b are aligned, the knob exposed in slot b can be rotated directly by hand without additional disassembly or deep insertion into the drive shaft. This allows for quick and precise control of the adjustment shaft rotation even when the machine is stopped, thus efficiently switching the blade angle. This design significantly improves the ease of operation and adjustment reliability. At the same time, the physical limiting characteristics of the knob prevent tools from accidentally touching other parts of the drive shaft, ensuring equipment safety.

[0014] Preferably, the spindle has several through holes communicating with the interior, and several mounting seats are fixed at the positions of the through holes on the spindle. A retaining ring is connected to one side of the mounting seat by bolts.

[0015] Preferably, one end of the stirring shaft is fixedly connected to the mounting base via a retaining ring.

[0016] In practical use, the retaining ring is fastened to the mounting seat at the through hole of the main shaft with bolts, forming a rigid clamp on the end of the stirring shaft. While ensuring that the stirring shaft and the main shaft rotate synchronously, the meshing position of the bevel gear b in the transmission module and the bevel gear a on the adjusting shaft is precisely limited, avoiding gear dislodging or wear due to axial displacement during transmission. Its modular assembly method not only ensures the load-bearing stability of the stirring shaft, but also facilitates quick disassembly and replacement of the blade assembly during later maintenance, significantly improving the structural reliability and service life of the equipment.

[0017] Preferably, drive shaft a, drive shaft b, and stirring shaft are all installed coaxially.

[0018] In practical use, the axes of drive shaft a and drive shaft b are strictly aligned with the stirring shaft. This ensures that the torque of the adjusting shaft is efficiently transmitted to the transmission components via a straight path through bevel gear a → bevel gear c → bevel gear d → bevel gear e → drive shaft b after meshing with bevel gear a and bevel gear b. This completely eliminates vibration and energy loss caused by multi-axis eccentricity. At the same time, the coaxial structure maximizes the use of the internal space of the stirring shaft, significantly improving the system rigidity while ensuring transmission accuracy. This makes the blade angle adjustment more stable and reliable, and reduces the risk of mechanical failure during high-speed stirring.

[0019] Preferably, a single stirring shaft has three through slots c, a gear seat is installed on the outer wall of the stirring shaft, and a bevel gear d is located inside the stirring shaft and is rotatably connected to the gear seat.

[0020] In practical use, by moving the rotation fulcrum of the bevel gear d outside the wall thickness of the stirring shaft, the bevel gear d is provided with both radial and axial rigid constraints, thus completely eliminating gear oscillation during the transmission process.

[0021] Preferably, the sleeve and the inner wall of the stirring shaft are fitted with a clearance, and the transmission component is located in the through groove c.

[0022] In practical use, the through groove c can limit the range of motion of the transmission components.

[0023] Preferably, the transmission module includes three sleeves, one sleeve being fitted onto the transmission shaft a and the other two sleeves being fitted onto the transmission shaft b; the blade assembly includes three blades, one blade being drivenly connected to the transmission shaft a and the other two blades being drivenly connected to the transmission shaft b; wherein the installation angle of the blade drivenly connected to the transmission shaft a is opposite to the installation angle of the blade drivenly connected to the transmission shaft b.

[0024] In practical use, the reverse-mounted blades automatically counteract the radial eccentric torque during the stirring process, completely eliminating abnormal vibration of the main shaft; their synergistic effect ensures that a symmetrical flow field is always formed in the reactor when the material is "rising from the center / falling from the edge" or switching between reverse flow patterns, thus improving the mixing uniformity.

[0025] Compared with the prior art, the present invention provides a bidirectional spiral stirring device, which has the following beneficial effects:

[0026] By using a coaxial transmission mechanism driven by an integrated adjustment shaft on the main shaft, the blade angle can be flexibly switched. This allows the material flow direction to be changed simply by adjusting the blade angle without changing the direction of the drive shaft (e.g., free conversion between "center rising / edge falling" and "center falling / edge rising" flow patterns). This significantly improves the equipment's adaptability to complex working conditions such as viscosity changes and reaction stage switching. At the same time, the integrated coaxial transmission structure ensures the accuracy of angle adjustment and operational stability. Ultimately, this achieves a dual improvement in mixing efficiency and reaction uniformity with lower energy consumption and simpler operation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the connecting seat structure of this utility model;

[0030] Figure 3 This is a side longitudinal sectional view of the stirring paddle mechanism of this utility model;

[0031] Figure 4 This is a partial cross-sectional view of the vessel body of this utility model;

[0032] Figure 5 This is an exploded view of the blade assembly of this utility model;

[0033] Figure 6 This is a schematic diagram of the transmission module structure of this utility model;

[0034] Figure 7 This is a partial cross-sectional view of the main shaft of this utility model;

[0035] Figure 8 This is a schematic diagram of the blade structure of this utility model;

[0036] Figure 9 This is a side view of the transmission module of this utility model.

[0037] In the diagram: 10, vessel body; 20, vessel cover; 30, connecting seat; 310, through groove a; 40, machine base; 50, motor; 60, stirring paddle mechanism; 610, drive shaft; 611, through groove b; 620, main shaft; 621, mounting seat; 622, retaining ring; 623, adjusting shaft; 624, bevel gear a; 625, knob; 630, paddle assembly; 631, transmission module; 6311, transmission shaft a; 6312, bevel gear b; 6313, transmission shaft b; 6314, sleeve; 6315, bevel gear c; 6316, bearing; 6317, bevel gear d; 6318, transmission component; 6319, bevel gear e; 632, stirring shaft; 6321, through groove c; 6322, gear seat; 633, paddle; 6331, bolt hole. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Example:

[0041] Please see Figures 1-9 The present invention provides a technical solution: a bidirectional spiral stirring device, comprising a vessel body 10, a vessel cover 20 installed on the vessel body 10 for sealing, a stirring paddle mechanism 60 located inside the vessel body 10 for stirring materials, a connecting seat 30 installed on the vessel cover 20, a base 40 installed on the connecting seat 30, and a motor 50 installed on the base 40 for driving the stirring paddle mechanism 60 to rotate.

[0042] The stirring paddle mechanism 60 includes a drive shaft 610 passing through the middle of the connecting seat 30 and the vessel body 10, a main shaft 620 installed at the bottom end of the drive shaft 610, and several sets of paddle assemblies 630 horizontally installed on the main shaft 620 for stirring materials.

[0043] The main shaft 620 is hollow inside, and an adjusting shaft 623 is rotatably installed inside the main shaft 620. Several bevel gears a624 are sleeved on the adjusting shaft 623.

[0044] The blade assembly 630 includes a stirring shaft 632 mounted on a main shaft 620, blades 633 mounted on the stirring shaft 632, and a transmission module 631 mounted inside the stirring shaft 632 for driving the blades 633 to change their angle.

[0045] Transmission module 631 includes transmission shaft a6311, transmission shaft b6313, sleeve 6314, bearing 6316, and transmission component 6318. Transmission shaft a6311 and transmission shaft b6313 are rotatably mounted inside stirring shaft 632 via bearing 6316. A bevel gear b6312 is installed at one end of transmission shaft a6311 near adjusting shaft 623, and a bevel gear c6315 is installed at the other end of transmission shaft a6311. Transmission shaft b6313 is located near transmission shaft a6311. One end is equipped with a bevel gear e6319, and a bevel gear d6317 is installed between the bevel gear c6315 and the bevel gear e6319. The bevel gear e6319 and the bevel gear c6315 are connected by the bevel gear d6317. Several sleeves 6314 are sleeved on the drive shaft a6311 and the drive shaft b6313. The transmission component 6318 is embedded in the outer wall of the sleeve 6314. The blade 633 has bolt holes 6331 for connecting with the transmission component 6318.

[0046] In practical use, the adjusting shaft 623 inside the main shaft 620 is manually rotated to drive the bevel gear a624, which in turn drives the bevel gears b6312, c6315, d6317 and e6319 in the transmission module 631. This drives the transmission component 6318 to make the blades 633 rotate in the opposite direction. This allows for flexible switching of the blade angle 633 while keeping the direction of the drive shaft 610 constant. This enables the free selection of two mixing flow patterns: "center material rises / edge material falls" or "center material falls / edge material rises." This significantly improves adaptability to different material characteristics and reaction stages, optimizes mixing efficiency and reaction uniformity, simplifies the operation process, and reduces energy consumption.

[0047] Preferably, the side of the connecting seat 30 is provided with a horizontal through groove a310, and the top outer wall of the drive shaft 610 is provided with a horizontal through groove b611.

[0048] Preferably, the top end of the adjusting shaft 623 is located in the middle of the through groove b611, and a knob 625 is sleeved on the top end of the adjusting shaft 623.

[0049] In practical use, when the through slot a310 is aligned with the through slot b611, the knob 625 exposed in the through slot b611 can be rotated directly by hand or operated with a simple tool without additional disassembly or deep insertion into the drive shaft 610. This allows for quick and precise control of the adjustment shaft 623 rotation while the machine is stopped, thereby efficiently switching the blade 633 angle. This design significantly improves the ease of operation and adjustment reliability. At the same time, the physical limiting characteristics of the knob 625 prevent tools from accidentally touching other parts of the drive shaft 610, ensuring equipment safety.

[0050] Preferably, the spindle 620 has several through holes communicating with the interior, and several mounting seats 621 are fixed at the positions of the through holes on the spindle 620. A retaining ring 622 is bolted to one side of the mounting seat 621.

[0051] Preferably, one end of the stirring shaft 632 is fixedly connected to the mounting base 621 via a retaining ring 622.

[0052] In practical use, the retaining ring 622 is fastened to the mounting base 621 at the through hole of the main shaft 620 by bolts, forming a rigid clamp on the end of the stirring shaft 632. While ensuring that the stirring shaft 632 rotates synchronously with the main shaft 620, the meshing position of the bevel gear b6312 in the transmission module 631 and the bevel gear a624 on the adjusting shaft 623 is precisely limited, avoiding gear dislodging or wear due to axial displacement during transmission. Its modular assembly method not only ensures the load-bearing stability of the stirring shaft 632, but also facilitates quick disassembly and replacement of the blade assembly 630 during later maintenance, significantly improving the structural reliability and service life of the equipment.

[0053] Preferably, drive shaft a6311, drive shaft b6313, and stirring shaft 632 are all coaxially mounted.

[0054] In practical use, the axes of drive shaft a6311, drive shaft b6313 and stirring shaft 632 are strictly aligned, ensuring that the torque of adjusting shaft 623 is efficiently transmitted to transmission component 6318 through the meshing of bevel gear a624 and bevel gear b6312 along a straight path via drive shaft a6311 → bevel gear c6315 → bevel gear d6317 → bevel gear e6319 → drive shaft b6313, completely eliminating vibration and energy loss caused by multi-axis eccentricity; at the same time, the coaxial structure maximizes the use of the internal space of stirring shaft 632, significantly improving system rigidity while ensuring transmission accuracy, making the angle adjustment of blade 633 more stable and reliable, and reducing the risk of mechanical failure during high-speed stirring.

[0055] Preferably, a single stirring shaft 632 has three through slots c6321, a gear seat 6322 is installed on the outer wall of the stirring shaft 632, and a bevel gear d6317 is located inside the stirring shaft 632 and is rotatably connected to the gear seat 6322.

[0056] In practical use, by moving the rotation fulcrum of the bevel gear d6317 outside the wall thickness of the stirring shaft 632, the bevel gear d6317 is provided with radial and axial dual rigid constraints, completely eliminating gear oscillation during the transmission process.

[0057] Preferably, the sleeve 6314 and the inner wall of the stirring shaft 632 are fitted with a clearance, and the transmission component 6318 is located in the through groove c6321.

[0058] In practical use, the through groove c6321 can limit the range of motion of the transmission component 6318.

[0059] Preferably, the transmission module 631 includes three sleeves 6314, one sleeve 6314 being fitted onto the transmission shaft a6311, and the other two sleeves 6314 being fitted onto the transmission shaft b6313; the blade assembly 630 includes three blades 633, one blade 633 being drive-connected to the transmission shaft a6311, and the other two blades 633 being drive-connected to the transmission shaft b6313; wherein the installation angle of the blade 633 drive-connected to the transmission shaft a6311 is opposite to the installation angle of the blade 633 drive-connected to the transmission shaft b6313.

[0060] In practical use, the reverse-mounted blades 633, with their single and double blades at opposite angles, automatically counteract the radial eccentric torque during stirring, completely eliminating abnormal vibration of the main shaft 620. Their synergistic effect ensures that a symmetrical flow field is always formed within the vessel 10 when the material is in a "center-rising / edge-falling" or reverse flow pattern switching, thus improving the mixing uniformity.

[0061] Working principle: After stopping the machine, align the through slot a310 of the connecting seat 30 with the through slot b611 of the drive shaft 610 using a tool. Rotate the knob 625 using a tool to drive the adjusting shaft 623 to rotate. The bevel gear a624 on it meshes with the bevel gear b6312 of the transmission module 631, driving the transmission shaft a6311 to rotate. Then, through the reverse transmission of bevel gear c6315 → bevel gear d6317 → bevel gear e6319, the transmission shaft b6313 obtains the opposite direction of the transmission shaft a6311. This is then transmitted through the sleeve 6314 and the through slot c632. The transmission component 6318 synchronously drives the single blade 633 and the double blade 633 to deflect in opposite directions. After restarting the motor, under the same drive shaft 610 rotation, the blades with opposite angles cause the material to generate two flow patterns - the single blade presses down / the double blades push up to form a "center descending-edge rising" flow, or the single blade pushes up / the double blades press down to form a "center rising-edge descending" flow. The sleeve 6314 with clearance fit absorbs thermal expansion, the transmission component 6318 is rigid and anti-slip, and the reverse blade layout automatically balances the radial load, realizing efficient mixing and ultra-low vibration operation.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

Claims

1. A bi-directional helical mixing device, characterized by: It includes a vessel body (10), a vessel lid (20) installed on the vessel body (10) for sealing, a stirring paddle mechanism (60) located inside the vessel body (10) for stirring materials, a connecting seat (30) installed on the vessel lid (20), a base (40) installed on the connecting seat (30), and a motor (50) installed on the base (40) for driving the stirring paddle mechanism (60) to rotate. The stirring paddle mechanism (60) includes a drive shaft (610) passing through the middle position between the connecting seat (30) and the vessel body (10), a main shaft (620) installed at the bottom end of the drive shaft (610), and several sets of paddle assemblies (630) horizontally installed on the main shaft (620) for stirring materials. The main shaft (620) is hollow inside, and an adjusting shaft (623) is rotatably installed inside the main shaft (620). Several bevel gears a (624) are sleeved on the adjusting shaft (623). The blade assembly (630) includes a stirring shaft (632) mounted on a main shaft (620), blades (633) mounted on the stirring shaft (632), and a transmission module (631) mounted inside the stirring shaft (632) for driving the blades (633) to change angle. The transmission module (631) includes a transmission shaft a (6311), a transmission shaft b (6313), a sleeve (6314), a bearing (6316), and a transmission component (6318). The transmission shaft a (6311) and the transmission shaft b (6313) are rotatably mounted inside the stirring shaft (6312) via the bearing (6316). A bevel gear b (6312) is installed at one end of the transmission shaft a (6311) near the adjusting shaft (623), and a bevel gear c (6315) is installed at the other end of the transmission shaft a (6314). The transmission shaft b (6313) is located near the transmission shaft a (6314). 1) One end is equipped with a bevel gear e (6319), and a bevel gear d (6317) is installed between the bevel gear c (6315) and the bevel gear e (6319). The bevel gear e (6319) and the bevel gear c (6315) are connected by the bevel gear d (6317). Several sleeves (6314) are sleeved on the drive shaft a (6311) and the drive shaft b (6313). The transmission component (6318) is embedded in the outer wall of the sleeve (6314). The blade (633) has bolt holes (6331) for connecting with the transmission component (6318).

2. A bidirectional helical mixing device according to claim 1, wherein: The side of the connecting seat (30) is provided with a horizontal through groove a (310), and the top outer wall of the drive shaft (610) is provided with a horizontal through groove b (611).

3. A bidirectional helical mixing device according to claim 1, wherein: The top end of the adjusting shaft (623) is located in the middle of the through groove b (611), and a knob (625) is sleeved on the top end of the adjusting shaft (623).

4. A bidirectional helical mixing device according to claim 1, wherein: The spindle (620) has several through holes communicating with the interior. Several mounting seats (621) are fixed at the through holes on the spindle (620). A retaining ring (622) is bolted to one side of the mounting seat (621).

5. A bidirectional helical mixing device according to claim 1, wherein: One end of the stirring shaft (632) is fixedly connected to the mounting base (621) via a retaining ring (622).

6. A bidirectional helical mixing device according to claim 1, wherein: The drive shaft a (6311), drive shaft b (6313), and stirring shaft (632) are all coaxially mounted.

7. A bidirectional helical mixing device according to claim 1, wherein: Three through slots c (6321) are provided on a single stirring shaft (632). A gear seat (6322) is installed on the outer wall of the stirring shaft (632). The bevel gear d (6317) is located inside the stirring shaft (632) and is rotatably connected to the gear seat (6322).

8. A bidirectional helical mixing device according to claim 1, wherein: The sleeve (6314) is clearance-fitted with the inner wall of the stirring shaft (632), and the transmission component (6318) is located in the through groove c (6321).

9. A bidirectional helical mixing device according to claim 1, wherein: The transmission module (631) includes three sleeves (6314), one sleeve (6314) is fitted onto the transmission shaft a (6311), and the other two sleeves (6314) are fitted onto the transmission shaft b (6313); the blade assembly (630) includes three blades (633), one blade (633) is connected to the transmission shaft a (6311), and the other two blades (633) are connected to the transmission shaft b (6313); wherein, the installation angle of the blade (633) connected to the transmission shaft a (6311) is opposite to the installation angle of the blade (633) connected to the transmission shaft b (6313).

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