Liftable anti-vortex stirring kettle for laboratory

Abstract

The utility model discloses a liftable anti-vortex stirring kettle for a laboratory, which comprises a base, a turnover stirring kettle is mounted on the base through a support, a limiting component is arranged on one side of the stirring kettle, a liftable stirrer is erected in the stirring kettle, the stirrer comprises a stirring shaft, and the stirring shaft is provided with an anti-vortex device. Stirring blades with adjustable stirring radiuses are distributed on the two sides of the stirring shaft, spoilers are distributed on the inner walls of the two sides of the stirring kettle, the spoilers on the two sides are oppositely arranged in a staggered mode, and the stirring blades are located between the vertically adjacent spoilers on the corresponding sides respectively; the lifting of the stirrer is driven by a lifting guide assembly of which one side can be accurately positioned. The liftable anti-vortex efficient stirring kettle adopts the lifting type stirring motor, the fan-shaped stirrer and the irregular choked flow baffle, effectively prevents vortex formation, improves efficiency and stirring quality, and is simple in structure, stable in operation, uniform in stirring, high in efficiency, low in cost and convenient for pouring out finished products.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical reagent stirring equipment, in particular to a stirring kettle capable of lifting and lowering and preventing eddy currents for use in a laboratory. Background Art

[0002] The stirred tank is a necessary container for chemical reactions. It is a device for forced convection and uniform mixing of liquid and gaseous media. Through the structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are realized in the same way as the performance principle of the reactor. Traditional agitators are mostly flat-paddle type and inclined-paddle type. The flat-paddle agitator consists of two straight blades, and the radial liquid flow velocity generated is relatively small, thus generating axial liquid flow. It has a simple structure and is often used for mixing low-viscosity liquids and dissolving and suspending solid particles.

[0003] The type, size and speed of the agitator have an impact on the distribution of stirring power between the overall flow and turbulent pulsation. Generally speaking, the power distribution of turbine agitators is favorable to turbulent pulsation, while that of propeller agitators is favorable to overall flow. For the same type of agitators, under the condition of the same power consumption, the power of a large-diameter, low-speed agitator is mainly consumed in the overall flow, which is beneficial to macro-mixing. The power of a small-diameter, high-speed agitator is mainly consumed in turbulent pulsation, which is beneficial to micro-mixing.

[0004] Therefore, for different media and different requirements, the stirring method, power and size of the stirring blades need to be different, and the stirring kettle in the laboratory must be universal, so as to meet the requirements of different experiments. For example, the patent publication number is: CN 207507479 U, which discloses a high-efficiency rotatable laboratory reactor. Although it discloses that the reaction chamber can be rotated in all directions and inverted by a steering device, it is convenient to clean the residue in the reaction chamber and the cleaning of the inner wall, and improves the practicality and convenience of operation of the reactor, but in specific use, it still has the following technical defects:

[0005] (1) During the stirring process, the agitator is inserted into the reaction chamber at a fixed position, and the stirring blades are fixed, with a non-adjustable stirring diameter. For different experimental stirrings, the stirring can only be controlled by the stirring speed. The overall flow and turbulent pulsation during the stirring process must consider not only the speed but also the type and size, which limits the adequacy of the stirring. Therefore, it cannot meet the properties and stirring requirements of different media.

[0006] (2) Most stirred tanks have a smooth inner wall, which easily forms turbulent pulsation and eddy currents, resulting in axial liquid flow and a large circulation volume, which results in poor liquid stirring uniformity. Utility Model Content

[0007] The purpose of the utility model is to overcome the defects and shortcomings of the prior art, provide a laboratory-use stirring kettle capable of lifting and lowering and preventing eddy currents, and solve various problems existing in the prior art.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A laboratory-use liftable anti-eddy current stirring kettle comprises a base, a flippable stirring kettle is mounted on the base via a support, a limit assembly is provided on one side of the stirring kettle, a liftable agitator is mounted in the stirring kettle, the agitator comprises a stirring shaft, stirring blades with adjustable stirring radius are arranged on both sides of the stirring shaft, baffles are arranged on the inner walls of both sides of the stirring kettle, and the baffles on both sides are relatively staggered, the stirring blades are respectively located between the upper and lower adjacent baffles on the corresponding side, and the lifting and lowering of the agitator is driven by a lifting guide assembly that can be accurately positioned on one side.

[0010] The supports are two correspondingly arranged on the base, and the upper ends of the supports are rotatably mounted with bearing sleeves through bearing seats. Rotating shafts are respectively mounted on both sides of the stirring kettle through shaft sleeves, and the other ends of the rotating shafts are fixed in the bearing sleeves.

[0011] The limit assembly includes a limit core, a hand lever is fixed on one side of the mixing kettle, a limit hole for positioning the limit core is provided at the bottom end of the hand lever, the limit core is laterally guided and installed on a fixed block on one side, a foot pedal is provided at the rear end of the limit core, the foot pedal is hingedly connected to the fixed plate through an inclined connecting plate, and a return spring is provided between the inner side of the foot pedal and the fixed block.

[0012] The stirring blades are composed of horizontal blades and arc blades, one end of the horizontal blade and the arc blade is fixed on the hinge shaft, and the other end is hingedly connected to form a fan shape, and the stirring blades on both sides of the stirring shaft are staggered up and down.

[0013] The stirring shaft is provided with a plurality of fixing holes arranged at vertical intervals for facilitating adjustment of the fixing positions of the arc-shaped blades.

[0014] The spoiler comprises a connecting rod, and hollow sector plates are respectively installed on the ends of the connecting rod.

[0015] The lifting guide assembly includes two motor lifting guide rods arranged in parallel, on which sleeves are respectively installed for guiding, and locking pins are respectively arranged on the sleeves. The sleeves are connected by motor brackets, and the movement of the sleeves along the motor lifting guide rods is driven by gear rack meshing transmission.

[0016] The motor lifting guide rod is provided with scales for conveniently observing the motor lifting height.

[0017] A circular gear is rotatably mounted on one of the sleeves on the motor lifting guide rod, a gear lifting rod is provided on one side of the sleeve, a rack meshing with the circular gear is provided on the gear lifting rod, a rocker is installed on the end of the rotating shaft of the circular gear, and the rotating position of the circular gear is positioned by a limit pin above.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model adjusts the lifting and lowering of the stirring motor by a lifting rod, thereby adjusting the height of the stirrer. The spur gear on the gear lifting rod cooperates with the circular gear on the motor lifting rod. The height of the stirrer can be adjusted at any time according to different stirring media and stirring requirements through a rocker. The circular gear is limited by a limiting pin, and the position and scale of the sleeve on the motor lifting rod are locked by a locking pin. The position of the sleeve on the lifting rod can be accurately controlled, and it can be used in a variety of stirring kettles.

[0020] A support is provided outside the mixing kettle, and a limit device is provided on one side of the support. The limit device can freely rotate the mixing kettle within 180 degrees through the limit core, the pedal and the hand lever, so as to facilitate the leaching of the liquid in the mixing kettle. Several baffles are irregularly provided in the mixing kettle to buffer and prevent eddy currents for the mixing liquid;

[0021] The agitator is designed to be irregularly distributed in a fan shape on the agitator shaft. The operating speed is relatively high, and the circumferential speed of the outer edge of the blade is generally 5-15m / s, which causes axial liquid flow and produces a larger circulation volume. The asymmetrical arrangement of the agitator blades can increase turbulence, prevent liquid surface depression, reduce liquid shaking, and reduce liquid vortex, which is conducive to smooth and uniform stirring of the liquid.

[0022] Moreover, the lifting, guiding, locking and positioning of the structure of the present application are all controlled manually, which is convenient for adjustment and control, and is particularly suitable for the requirements of laboratory stirring kettles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0024] Figure 2 The front view of the utility model;

[0025] Figure 3 A side view of the utility model;

[0026] Figure 4 It is a top view of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the agitator of the utility model.

[0028] Reference numerals:

[0029] 1. Base; 2. Motor lifting guide rod; 3. Sleeve; 4. Locking pin; 5. Scale; 6. Circular gear; 7. Gear lifting rod; 8. Rack; 9. Rocker; 10. Limit pin; 11. Motor bracket; 12. Stirring motor; 13. Agitator; 13-1. Stirring shaft; 13-2. Stirring blade; 13-2-1. Horizontal blade; 13-2-2. Arc blade; 13-2-3. Fixing hole; 14. Stirring kettle; 15. Support; 16. Bearing sleeve; 17. Return spring; 18. Rotating shaft; 19. Bushing; 20. Hand lever; 21. Limit assembly; 22. Limit core; 23. Foot pedal; 24. Baffle. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See attached Figure 1-5 ;

[0032] A laboratory-use liftable anti-eddy current stirring kettle comprises a base 1, characterized in that: a reversible stirring kettle 14 is mounted on the base 1 through a support 15, two supports 15 are correspondingly arranged on the base 1, and a bearing sleeve 16 is rotatably mounted on the upper end thereof through a bearing seat, a rotating shaft 18 is respectively mounted on both sides of the stirring kettle 14 through a shaft sleeve 19, and the other end of the rotating shaft 18 is fixed in the bearing sleeve 16, a limiting component 21 is provided on one side of the stirring kettle 14, a liftable agitator 13 is mounted in the stirring kettle 14, and the agitator is driven by a stirring motor 17 above, the agitator 13 comprises a stirring shaft 13-1, stirring blades 13-2 with adjustable stirring radius are distributed on both sides of the stirring shaft 13-1, baffles 24 are distributed on the inner walls of both sides of the stirring kettle 14, and the baffles 24 on both sides are relatively staggered, and the stirring blades 13-2 are respectively located between the upper and lower adjacent baffles 24 on the corresponding side, and the lifting and lowering of the agitator 13 is driven by a lifting guide component that can be accurately positioned on one side.

[0033] Furthermore, the limit assembly 21 includes a limit core 22, a hand lever 20 is fixed on one side of the reactor 14, a limit hole for positioning the limit core 22 is provided at the bottom end of the hand lever 20, the limit core 22 is laterally guided and installed on a fixed block on one side, a foot pedal 23 is provided at the rear end of the limit core 22, the foot pedal 23 is hingedly connected to the fixed plate through an inclined connecting plate, and a return spring 17 is provided between the inner side of the foot pedal 23 and the fixed block.

[0034] Furthermore, the stirring blade 13-2 is composed of a horizontal blade 13-2-1 and an arc-shaped blade 13-2-2, and one end of the horizontal blade 13-2-1 and the arc-shaped blade 13-2-2 is fixed on the hinge shaft, and the other end is hingedly connected to form a fan shape, and the stirring blades 13-2 on both sides of the stirring shaft 13-1 are staggered up and down; the stirrer is irregularly distributed on the stirring shaft in a fan shape, and the working speed is relatively high, and the circumferential speed of the outer edge of the blade is generally 5-15m / s. It causes axial liquid flow and produces a large circulation volume. The asymmetrical arrangement of the stirrer blades can increase turbulence, prevent liquid surface depression, reduce liquid shaking, reduce liquid vortex, and facilitate smooth and uniform stirring of the liquid. A plurality of fixing holes 13-2-3 arranged at vertical intervals are distributed on the stirring shaft 13-1 to facilitate adjustment of the fixed position of the arc-shaped blades. The position of the arc blade is conveniently adjusted and fixed by fixing the position of the arc blade through the fixing hole, so as to achieve stirring blades with different stirring radii. The baffle 24 includes a connecting rod, and the ends of the connecting rod are respectively installed with hollow fan-shaped plates; it plays a buffering and anti-vortex role for the stirring liquid.

[0035] Further, the lifting guide assembly includes two motor lifting guide rods 2 arranged in parallel, sleeves 3 are respectively installed on the motor lifting guide rods 2, locking pins 4 are respectively installed on the sleeves 3, the sleeves 3 are connected by motor brackets 11, and the movement of the sleeves 3 along the motor lifting guide rods 2 is driven by gear rack meshing transmission. The motor lifting guide rods 2 are provided with scales 5 for conveniently observing the motor lifting height; the position of the sleeves on the lifting rods can be accurately controlled. A circular gear 6 is rotatably installed on one of the sleeves 3 on the motor lifting guide rods 2, a gear lifting rod 7 is provided on one side of the sleeve, a rack 8 meshing with the circular gear is provided on the gear lifting rod 7, a rocker 9 is installed on the end of the rotating shaft of the circular gear 6, and the rotation position of the circular gear 6 is positioned by the upper limit pin 10; the height of the agitator can be adjusted at any time according to different stirring media and stirring requirements through the rocker, the circular gear is limited by the limit pin, and the position of the sleeve on the motor lifting rod is locked by the locking pin.

[0036] When in use, according to the properties of the stirring medium and the stirring requirements, use the rocker and scale to adjust the height of the stirring motor and the agitator; use the locking pin to lock the sleeve on the lifting rod; add the medium to be stirred into the stirring kettle, start the stirring motor to stir the medium, and after the stirring is completed, stop the motor, raise the agitator with the rocker and leave the stirring kettle; step on the pedal, pull the limit core, rotate the hand lever, and pour out the liquid in the stirring kettle, and one operation is completed.

[0037] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0038] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A laboratory stirring kettle capable of lifting and lowering and preventing eddy currents, comprising a base (1), characterized in that: A reversible stirring kettle (14) is mounted on the base (1) via a support (15); a limit assembly (21) is provided on one side of the stirring kettle (14); a liftable agitator (13) is mounted inside the stirring kettle (14); the agitator (13) comprises a stirring shaft (13-1); stirring blades (13-2) with adjustable stirring radius are arranged on both sides of the stirring shaft (13-1); baffles (24) are arranged on both sides of the inner wall of the stirring kettle (14); the baffles (24) on both sides are arranged in a staggered manner; the stirring blades (13-2) are respectively located between upper and lower adjacent baffles (24) on the corresponding side; and the lifting and lowering of the agitator (13) is driven by a lifting guide assembly on one side that can be precisely positioned.

2. The laboratory liftable anti-eddy current stirring kettle according to claim 1, characterized in that: The supports (15) are two supports (15) correspondingly arranged on the base (1), and the upper ends of the supports are rotatably mounted with bearing sleeves (16) via bearing seats. The two sides of the stirring kettle (14) are respectively mounted with rotating shafts (18) via shaft sleeves (19), and the other ends of the rotating shafts (18) are fixed in the bearing sleeves (16).

3. The laboratory liftable anti-eddy current stirring kettle according to claim 1, characterized in that: The limiting assembly (21) comprises a limiting core (22), a hand lever (20) is fixed on one side of the stirring kettle (14), a limiting hole for positioning the limiting core (22) is provided at the bottom end of the hand lever (20), the limiting core (22) is laterally guided and installed on a fixed block on one side, a foot pedal (23) is provided at the rear end of the limiting core (22), the foot pedal (23) is hingedly connected to the fixed plate via an inclined connecting plate, and a return spring (17) is provided between the inner side of the foot pedal (23) and the fixed block.

4. The laboratory liftable anti-eddy current stirring kettle according to claim 1, characterized in that: The stirring blade (13-2) is composed of a horizontal blade (13-2-1) and an arc-shaped blade (13-2-2), and one end of the horizontal blade (13-2-1) and the arc-shaped blade (13-2-2) is fixed on a hinge shaft, and the other end is hingedly connected to form a fan shape, and the stirring blades (13-2) on both sides of the stirring shaft (13-1) are arranged in an up-and-down staggered manner.

5. The laboratory liftable anti-eddy current stirring kettle according to claim 4, characterized in that: The stirring shaft (13-1) is provided with a plurality of fixing holes (13-2-3) arranged at vertical intervals for facilitating adjustment of the fixing positions of the arc-shaped blades.

6. The laboratory liftable anti-eddy current stirring kettle according to claim 1, characterized in that: The spoiler (24) comprises a connecting rod, and hollow sector plates are respectively installed at the ends of the connecting rod.

7. The laboratory liftable anti-eddy current stirring kettle according to claim 1, characterized in that: The lifting guide assembly comprises two motor lifting guide rods (2) arranged in parallel, sleeves (3) are respectively installed on the motor lifting guide rods (2), locking pins (4) are respectively arranged on the sleeves (3), the sleeves (3) are connected by a motor bracket (11), and the movement of the sleeves (3) along the motor lifting guide rods (2) is driven by gear rack meshing transmission.

8. The laboratory liftable anti-eddy current stirring kettle according to claim 7, characterized in that: The motor lifting guide rod (2) is provided with scales (5) for conveniently observing the motor lifting height.

9. The laboratory liftable anti-eddy current stirring kettle according to claim 7, characterized in that: A circular gear (6) is rotatably mounted on one of the sleeves (3) on the motor lifting guide rod (2); a gear lifting rod (7) is provided on one side of the sleeve; a rack (8) meshing with the circular gear is provided on the gear lifting rod (7); a rocker (9) is mounted on the end of the rotating shaft of the circular gear (6); and the rotation position of the circular gear (6) is positioned by a limit pin (10) above.

Images