A precipitation kettle for rapid precipitation

Abstract

The present invention relates to the technical field of chemical equipment, and specifically discloses a solvent stripping kettle for rapid solvent stripping, which comprises a kettle body and a stirring mechanism arranged inside the kettle body. The stirring mechanism includes: a driving rod rotatably installed on the axis inside the kettle body; a lifting mechanism installed on the driving rod, the lifting mechanism includes two lifting rings sleeved on the driving rod and a driving component for driving the two lifting rings to move relative to each other; a lower stirring blade fixedly installed on the lower lifting ring; an upper stirring blade rotatably installed on the upper lifting ring with the axis of the driving rod as the rotation axis, and the lifting mechanism controls the upper and lower stirring blades to adhere to the inner wall of the kettle body during stirring; during the cleaning stage, when the driving rod rotates, the upper stirring blade and the lower stirring blade scrape the materials adhered to each other's surfaces through mutual shearing actions. After the machine stops, the upper stirring blade resets, and the upper stirring blade and the lower stirring blade scrape the materials adhered to the other side of the upper stirring blade through mutual shearing actions again.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical equipment, and particularly relates to a stripping kettle for rapid solvent stripping. Background Art

[0002] A stripping kettle is a device used to remove solvents from solutions and is applied in industries such as chemical engineering, pharmaceuticals, and food. Its main function is to separate the solvent from the solution by heating, decompression, or a combination of both, so as to obtain a concentrated solute or a dried product. The working principle of the stripping kettle is based on the volatility of the solvent. By heating the solution, the solvent evaporates, and then by reducing the pressure, the boiling point is lowered to accelerate the evaporation process. The evaporated solvent is recovered by condensation, and the solute remains in the kettle.

[0003] The Chinese patent document with the authorization announcement number CN221889723U discloses a stirring device for a stripping kettle, which includes a stripping kettle body. A stirring assembly is arranged inside the stripping kettle body. The stirring assembly includes a reciprocating lead screw. A collar threadedly connected to the reciprocating lead screw is sleeved on the reciprocating lead screw. A stirring rod is arranged on the collar. The stirring rod includes a pressing rod and a sleeve. One end of the pressing rod is connected to the sleeve through an elastic member. An arc-shaped scraping plate is arranged at the other end of the pressing rod. In this stirring assembly, a reciprocating lead screw is provided to change the height of the stirring blades and increase the acting range. An arc-shaped scraping plate is arranged at one end of the stirring rod. The stirring rod is set in the form of a combination of a sleeve and a pressing rod, which can clean the inner top surface and the inner bottom surface of the stripping kettle, and avoid incomplete cleaning of the residues on the inner wall of the stripping kettle when different materials are stripped.

[0004] The stripping kettle is relatively large in volume, with a large amount of residual solvent in the kettle, and the materials are deposited at the bottom of the kettle. And during the stripping process, a large amount of materials are carried by the steam and adhered to the inner top surface of the stripping kettle, resulting in waste of materials. And because it is not easy to clean the inside of the stripping kettle, there will be a large amount of impurities when stripping different materials. In the above document, the inner top surface and the inner bottom surface of the stripping kettle are cleaned by a displaceable arc-shaped scraping plate. However, it is difficult to clean the materials on the scraping plate. As the stripping becomes more and more complete, the materials become more and more viscous, and more and more materials adhere to the scraping plate, and the scraping effect will become worse and worse. Summary of the Invention

[0005] The present invention provides a stripping kettle for rapid solvent stripping, aiming to solve the problem in the related art that more and more materials adhere to the scraping plate, resulting in a poor scraping effect.

[0006] A stripping kettle for rapid solvent stripping includes a kettle body and a stirring mechanism arranged inside the kettle body. The stirring mechanism includes:

[0007] A driving rod rotatably installed on the axis inside the kettle body;

[0008] The lifting mechanism is installed on the driving rod. The lifting mechanism includes two lifting rings sleeved on the driving rod and a driving component for driving the two lifting rings to move relative to each other;

[0009] The lower stirring blade is fixedly installed on the lower lifting ring;

[0010] The upper stirring blade is rotatably installed on the upper lifting ring with the axis of the driving rod as the rotation axis. A limiting structure for restricting the relative rotation angle between the upper stirring blade and the lifting ring is installed between the upper stirring blade and the lifting ring, and a resetting member is installed between the upper stirring blade and the lifting ring;

[0011] During the stirring operation, the upper stirring blade and the lower stirring blade are respectively in contact with the upper and lower inner walls of the kettle body, so as to avoid material adhesion. When cleaning the upper stirring blade after the stirring is completed, the driving rod does not stop rotating, and the lifting mechanism makes the two lifting rings approach each other, so that one side of the upper stirring blade is tangent to the lower stirring blade. Then the driving rod stops rotating, the two lifting rings move away from each other, the resetting member resets the upper stirring blade, the two lifting rings approach each other again, and the other side of the stirring blade is tangent to the lower stirring blade.

[0012] The effect is that: the lifting mechanism controls the upper stirring blade and the lower stirring blade to adhere to the inner wall of the kettle body during stirring through the opposite movement of the two lifting rings, avoiding material adhesion; when too much material adheres to the upper stirring blade and the lower stirring blade, the lifting mechanism is started, so that the upper stirring blade descends and the lower stirring blade ascends until the lower stirring blade is completely in contact with the upper stirring blade. The upper stirring blade and the lower stirring blade scrape the material adhered to each other's surfaces through mutual shearing action, so that the material on the side of the lower stirring blade facing the rotation direction is scraped off, avoiding affecting the scraping effect of the lower stirring blade later. Then the upper stirring blade and the lower stirring blade are reset. Finally, when the driving rod stops rotating, the upper stirring blade returns to the initial angle relative to the lifting ring under the action of the resetting member, and the lifting mechanism controls the upper stirring blade and the lower stirring blade to scrape off the material adhered to the other side of the upper stirring blade through mutual shearing action, significantly improving the scraping efficiency and reducing material residue.

[0013] Preferably, the number of the lower stirring blades is two, which are located on the same plane and are eccentrically arranged with respect to the axis of the driving rod. The distance from the plane where the side of the lower stirring blade close to the axis of the driving rod is located to the axis is x.

[0014] Preferably, the number of the upper stirring blades is two, which are connected together by a connecting ring. The two upper stirring blades are located on the same plane, and in the radial direction of the driving rod, the thickness of the upper stirring blade is equal to 2x, so that the upper stirring blade can be in contact with the lower stirring blade on the horizontal projection plane both when it rotates 180° relative to the lifting ring and when it does not rotate.

[0015] Preferably, a guiding groove is formed in the driving rod along its length direction, and guiding bars are arranged in the two lifting rings and are matched with the guiding groove to limit the rotation of the driving rod.

[0016] Preferably, through holes are formed in both the top and the middle of the driving rod. The driving component includes a winding device installed in the driving rod. Ropes are wound around the two output ends of the winding device. The two ropes respectively pass through the two through holes of the driving rod and are respectively connected to the two lifting rings. By controlling the winding and unwinding of the two ropes by the winding device, the two lifting rings move relatively or move away from each other, and further the upper stirring blade and the lower stirring blade move relatively or move away from each other.

[0017] Preferably, the limiting structure includes an arc-shaped sliding groove formed on the outer circumferential surface of the upper lifting ring. A sliding block adapted to the arc-shaped sliding groove is arranged on the upper stirring blade. The central angle of the relative movement of the sliding block in the arc-shaped sliding groove with respect to the lifting ring is 180°.

[0018] Preferably, the resetting member is a torsion spring. The torsion spring is sleeved on the lifting ring, and the two ends of the torsion spring are respectively connected to the lifting ring and the upper stirring blade. When the upper stirring blade rotates and encounters resistance, the upper stirring blade rotates by a certain angle relative to the lifting ring, so that the torsion spring deforms. When the rotation stops, the torsion spring resets the upper stirring blade.

[0019] Preferably, the upper stirring blade is composed of a fixed blade and a movable blade attached to each other. The fixed blade is fixedly connected to the connecting ring. The movable blade is slidably connected to the fixed blade and magnetically connected therebetween, so that a gap can appear between the two. A receiving groove is formed between the fixed blade and the movable blade. A scraping blade is installed in the receiving groove, and a control mechanism for controlling the lifting of the scraping blade is installed in the receiving groove. When the scraping blade rises, the scraping blade pushes open the movable blade and the fixed blade, so that a gap appears between the movable blade and the fixed blade. The top end of the scraping blade is located above the movable blade and the fixed blade. When the upper stirring blade moves to the top, the control mechanism controls the scraping blade to rise relative to the fixed blade, so that a gap appears between the movable blade and the fixed blade, so that the tip of the scraping blade is exposed upward, and the scraping blade contacts the inner wall of the kettle body to scrape the material. When the upper stirring blade descends, the control mechanism retracts the scraping blade into the receiving groove, and at the same time the movable blade and the fixed blade scrape the material attached to the scraping blade.

[0020] Preferably, a vertical groove is formed on one side of the fixed blade close to the movable blade. A vertical bar adapted to the vertical groove is arranged on the scraping blade. The scraping blade is in sliding fit with the vertical groove through the vertical bar to limit the degree of freedom of the scraping blade.

[0021] Preferably, the control mechanism includes a push rod and a pressure rod. The middle of the push rod is hinged to the fixed blade. A notch is provided at one end of the push rod. A sliding shaft adapted to the notch is fixedly provided at the bottom of the scraper. The other end of the push rod abuts against the bottom of the pressure rod. The top end of the pressure rod extends out of the top end of the connecting ring and can abut against the inner top of the kettle body.

[0022] Adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0023] 1. In the initial state, the upper stirring blade and the lower stirring blade are respectively located at the top and bottom of the kettle body. The driving rod rotates to drive the upper stirring blade and the lower stirring blade to rotate for stirring and scraping the wall. When too much material adheres to the upper stirring blade and the lower stirring blade, the lifting mechanism causes the upper stirring blade to descend and the lower stirring blade to ascend until the lower stirring blade is completely attached to the upper stirring blade, so that the lower stirring blade and the upper stirring blade scrape the material from each other, thereby scraping the material on the side of the lower stirring blade facing the rotation direction, avoiding affecting the wall scraping effect of the lower stirring blade later. Then, the upper and lower stirring blades return to their original positions. When the solvent evaporates, the material on the side of the lower stirring blade facing the rotation direction is scraped off at intervals to avoid affecting the wall scraping and stirring effects;

[0024] 2. After the work is completed, the driving rod stops rotating. The connecting ring drives the upper stirring rod to reset under the action of the elastic member. The winding device winds one of the two ropes and unwinds the other, so that the lower stirring blade and the upper stirring blade approach each other, scraping the material adhering to the other side of the upper stirring blade, and avoiding the material adhering to both sides of the upper stirring blade from drying and caking due to long-term non-cleaning;

[0025] 3. When the upper stirring blade rises to the top, the kettle body abuts against the pressure rod, so that the pressure rod no longer rises. The lifting ring continues to rise, pressing one end of the push rod downward by the pressure rod, so that the other end of the push rod jacks up the scraper. The scraper pushes open the movable blade and the fixed blade, exposing the scraper, so that the scraper contacts the inner top wall of the kettle body, thereby scraping the material adhering to the inner top wall of the kettle body and avoiding the material on the top surface of the upper stirring blade from adhering to the inner top wall of the kettle body. Description of the Drawings

[0026] Figure 1 It is the front view of the present invention.

[0027] Figure 2 It is the cross-sectional view of the present invention.

[0028] Figure 3 It is the structural schematic diagram of the lifting mechanism in the present invention.

[0029] Figure 4 It is the structural schematic diagram of the upper stirring blade in the present invention.

[0030] Figure 5 It is the structural schematic diagram of the scraper in the present invention.

[0031] Figure 6 This is a schematic structural diagram of the upper lifting ring in the present invention.

[0032] Figure 7 This is a schematic diagram of the positions of the upper and lower stirring blades of the present invention on the horizontal projection plane.

[0033] Figure 8 This is a cross-sectional view of the upper stirring blade of the present invention.

[0034] Reference numerals:

[0035] 1, kettle body; 2, stirring mechanism; 21, driving rod; 22, lifting mechanism; 221, lifting ring; 222, rope; 23, lower stirring blade; 24, upper stirring blade; 241, limiting structure; 242, reset member; 243, fixed blade; 244, movable blade; 245, ejector rod; 246, pressure rod; 247, scraper. Detailed implementation manners

[0036] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0037] As Figure 1 and Figure 2 shown, a solvent removal kettle for rapid solvent removal is composed of a kettle body 1 and a stirring mechanism 2 arranged inside it. The side and bottom of the kettle body 1 are wound with heating tubes. By introducing a heating medium into the heating tubes, the temperature inside the kettle body 1 is increased, so that the internal solution is heated, the solvent evaporates, and then the boiling point is reduced by reducing the pressure to accelerate the evaporation process. A feeding port is opened at the top of the kettle body 1, and a sealing valve is installed on the feeding port. A discharging port is opened at the bottom of the kettle body 1, and a discharging valve is installed on the discharging port. The evaporated solvent is recovered by condensation, and the solute remains in the kettle. Then, the discharging valve is opened to discharge the solute from the discharging port.

[0038] As Figures 2 - 5As shown in the figure, the stirring mechanism 2 includes: a first motor, a driving rod 21, a lifting mechanism 22, a lower stirring blade 23, and an upper stirring blade 24. The first motor is installed at the top of the kettle body 1, and the output shaft of the first motor enters the kettle body 1. The driving rod 21 is rotatably installed in the kettle body 1 and is coaxial with the axis of the kettle body 1. The top end of the driving rod 21 is fixedly connected to the output shaft of the first motor. The lifting mechanism 22 is installed in the driving rod 21, and the lower stirring blade 23 and the upper stirring blade 24 are respectively connected to the two lifting ends of the lifting mechanism 22, so as to control the lifting of the lower stirring blade 23 and the upper stirring blade 24. During stirring, the upper stirring blade 24 and the lower stirring blade 23 are respectively attached to the upper and lower inner walls of the kettle body 1, so as to prevent materials from adhering to the inner wall of the kettle body 1. When too much material adheres to the upper stirring blade 24 and the lower stirring blade 23 and affects the scraping effect, the lifting mechanism 22 controls the upper stirring blade 24 and the lower stirring blade 23 to approach each other, so that the upper stirring blade 24 and the lower stirring blade 23 shear each other, and the material on the side of the lower stirring blade 23 facing the stirring direction is scraped off, avoiding the scraping effect of the upper stirring blade 24 and the lower stirring blade 23 on the inner wall of the kettle body 1.

[0039] The lifting mechanism 22 includes: a driving component and two lifting rings 221. A guiding groove is formed on the driving rod 21 along its length direction. Guiding strips matching the guiding groove are arranged on the inner circumferential surfaces of the two lifting rings 221, so that the lifting rings 221 can only slide up and down along the driving rod 21, avoiding the rotation of the lifting rings 221 relative to the driving rod 21. The driving component is used to control the two lifting rings 221 to move towards each other or away from each other. The lower stirring blade 23 and the upper stirring blade 24 are respectively installed on the two lifting rings 221, so as to control the lower stirring blade 23 and the upper stirring blade 24 to approach each other to complete shearing and scrape off the materials adhering to their sides.

[0040] The driving component includes a second motor fixedly installed in the driving rod 21. The second motor has two output ends, and winding wheels (not shown in the figure) are installed on the two output ends of the second motor. Ropes 222 are wound around the winding wheels respectively. Through holes are formed at the top and middle of the driving rod 21, and the two ropes 222 respectively pass through the two through holes of the driving rod 21 and are respectively connected to the two lifting rings 221, so as to control one winding wheel to wind and the other to unwind by the rotation of the motor. During winding, the rope 222 pulls the lifting ring 221 to rise. During unwinding, due to the gravity of the lifting ring 221, the lifting ring 221 descends along the driving rod 21, so that the two lifting rings 221 approach each other or move away from each other.

[0041] The number of the lower stirring blades 23 is two. The two lower stirring blades 23 are fixedly installed on the lower lifting ring 221, and the two lower stirring blades 23 are located in the same vertical plane. The distance between the plane passing through the axis of the lifting ring 221 and parallel to the lower stirring blade 23 and the lower stirring blade 23 is x (preferably 1 cm). The top surface and the outer side surface of the lower stirring blade 23 are arc-shaped and adapted to the inner top wall of the kettle body 1. The lower stirring blade 23 is used to scrape the materials at the bottom of the kettle body 1 to prevent the materials from sticking to the inner wall.

[0042] As Figures 3 - 7 shown, the number of the upper stirring blades 24 is two. The two upper stirring blades 24 are connected by a connecting ring. The two upper stirring blades 24 are located in the same vertical plane, and the two upper stirring blades 24 are located in the radial direction of the connecting ring. The thickness of the upper stirring blade 24 does not exceed 2x (preferably 2 cm). The top surface and the outer side surface of the upper stirring blade 24 are arc-shaped and adapted to the inner top wall of the kettle body 1. During the desolventization process, a large amount of materials are carried by the steam and attached to the inner top surface of the desolventization kettle. The upper stirring blade 24 is used to scrape the materials attached to the inner top surface to avoid waste.

[0043] In order to make the upper stirring blade 24 rotate 180° relative to the driving ring during stirring, the connecting ring is coaxially rotatably installed on the lifting ring 221, and a limiting structure 241 and a resetting member 242 (preferably a torsion spring, the torsion spring is sleeved on the lifting ring 221, and both ends of the torsion spring are respectively connected to the lifting ring 221 and the upper stirring blade 24) are arranged between the connecting ring and the lifting ring 221. The limiting structure 241 enables the connecting ring to only rotate 180° relative to the lifting ring 221;

[0044] The limiting structure 241 includes an arc-shaped chute and a slider. The arc-shaped chute is opened on the outer circumferential surface of the upper lifting ring 221. The slider is fixedly arranged on the upper stirring blade 24, and the slider is adapted to the arc-shaped chute. The movement center angle of the slider relative to the lifting ring 221 in the arc-shaped chute is 180°.

[0045] The upper stirring blade 24 and the connecting ring have two position states. The first state is that the connecting ring does not rotate relative to the lifting ring 221, and the second state is that the connecting ring rotates 180° relative to the lifting ring 221;

[0046] When the driving rod 21 rotates, due to the action of the liquid resistance, the upper stirring blade 24 is subjected to a resistance force opposite to its rotation direction, so that the connecting ring rotates 180° relative to the lifting ring 221, causing the torsion spring to accumulate elastic potential energy. The upper stirring blade 24 is in the second state. Then, the second motor is started to make one of the two winding wheels wind and the other unwind, so that the upper stirring blade 24 descends and the lower stirring blade 23 ascends until the lower stirring blade 23 is completely attached to the upper stirring blade 24, and the lower stirring blade 23 and the upper stirring blade 24 scrape the materials from each other;

[0047] When the driving rod 21 does not rotate, the torsion spring releases elastic potential energy, causing the connecting ring to rotate in the opposite direction relative to the lifting ring 221 to reset. The upper stirring blade 24 is in the first state. Then, start the second motor to make one of the two winding wheels wind and the other unwind. The lower stirring blade 23 and the upper stirring blade 24 approach each other, scraping off the material adhering to the other side of the upper stirring blade 24.

[0048] In summary, the resistance received by the upper stirring blade 24 during rotation and the elastic force of the torsion spring when it stops cause the upper stirring blade 24 to rotate relative to the driving rod 21, thereby changing the tangent plane between the upper and lower stirring blades 23.

[0049] When the driving rod 21 rotates, the connecting ring rotates 180° relative to the lifting ring 221. In this state, the projections of the lower stirring blade 23 and the upper stirring blade 24 on the horizontal plane do not overlap, and the sides of the lower stirring blade 23 and the upper stirring blade 24 that approach each other are in contact. When it is necessary to scrape the material adhering to the surface of the lower stirring blade 23 facing the rotation direction, the lower stirring blade 23 and the upper stirring blade 24 approach each other to complete shearing, scraping off the material adhering to their sides. The lower stirring blade 23 and the upper stirring blade 24 move away from each other, and the bottom and top of the return perform wall scraping work. When the driving rod 21 stops rotating, the connecting ring resets under the action of the elastic member. In this state, the projections of the lower stirring blade 23 and the upper stirring blade 24 on the horizontal plane do not overlap, and the other sides of the lower stirring blade 23 and the upper stirring blade 24 are in contact. The lower stirring blade 23 and the upper stirring blade 24 approach each other to complete shearing, scraping off the material adhering to the other side of the upper stirring blade 24. Since the upper stirring blade 24 is located above the solution in the scraping state, the material adhering to both sides of the upper stirring blade 24 is likely to dry and harden. Such a setting can scrape both sides of the upper stirring blade 24, preventing the material from adhering to the upper stirring blade 24 for a long time and being difficult to remove.

[0050] The working process steps are as follows:

[0051] Step 1: Pour the solution into the kettle body 1 through the feeding port, and then close the sealing valve.

[0052] Step 2: Pass the heating medium into the heating pipe from one end of the heating pipe to heat the solution inside the kettle body 1.

[0053] Step 3: The upper stirring blade 24 and the lower stirring blade 23 are respectively located at the top and bottom inside the kettle body 1. Start the first motor to make the driving rod 21 rotate, driving the upper stirring blade 24 and the lower stirring blade 23 to rotate for stirring and wall scraping.

[0054] Step 4: When excessive materials adhere to the upper stirring blade 24 and the lower stirring blade 23, start the second motor to make one of the two winding wheels wind and the other unwind, so that the upper stirring blade 24 descends and the lower stirring blade 23 ascends until the lower stirring blade 23 is completely attached to the upper stirring blade 24, and the lower stirring blade 23 and the upper stirring blade 24 scrape the materials from each other, so that the materials on the side of the lower stirring blade 23 facing the rotation direction are scraped off, avoiding affecting the wall scraping effect of the lower stirring blade 23 later, and then the upper stirring blade 24 and the lower stirring blade 23 return to their original positions;

[0055] Step 5: After the solvent evaporation is completed, the driving rod 21 stops rotating, and the connecting ring returns to its original position under the action of the elastic member. The lower stirring blade 23 and the upper stirring blade 24 approach each other, and the materials adhering to the other side of the upper stirring blade 24 are scraped off, avoiding the materials adhering to both sides of the upper stirring blade 24 from drying and caking due to long-term non-cleaning;

[0056] Step 6: Open the discharge valve to discharge the solute from the discharge port.

[0057] In summary, since the upper stirring blade 24 is not immersed in the solution, the materials adhering to the upper stirring blade 24 are scraped off at intervals to avoid the materials adhering to both sides of the upper stirring blade 24 from drying and caking due to long-term non-cleaning. During the solvent evaporation, the materials on the side of the lower stirring blade 23 facing the rotation direction are scraped off at intervals to avoid affecting the wall scraping effect of the lower stirring blade 23 later.

[0058] Since the top end of the upper stirring blade 24 cannot be scraped by the lower stirring blade 23 after the upper stirring blade 24 descends, the top end of the upper stirring blade 24 will adhere to materials, which will cause the materials to be coated on the inner top wall of the kettle body 1 and be difficult to scrape off. Therefore, the following settings are made to avoid the above situation;

[0059] The upper stirring blade 24 is composed of a fixed blade 243 and a movable blade 244. The fixed blade 243 is fixedly connected to the connecting ring, and the movable blade 244 is slidably connected to the fixed blade 243 through a sliding hole and a sliding key (as Figure 6 shown), so that when the two slide, the movable blade 244 and the fixed blade 243 are always parallel to each other, so that a gap can appear between the two, and the movable blade 244 and the fixed blade 243 have magnetism, so that the two can attract and stick together;

[0060] A receiving groove is formed between the fixed blade 243 and the movable blade 244, and the cross-sectional shape of the receiving groove is conical (as Figure 8As shown in the figure, a scraper 247 with a conical cross-section is installed in the receiving groove. A vertical groove is provided on the side of the fixed blade 243 close to the movable blade 244. A vertical bar adapted to the vertical groove is provided on the scraper 247, so as to limit the scraper 247 to only move up and down relative to the fixed blade 243. And a control mechanism for controlling the up and down movement of the scraper 247 is installed in the receiving groove. When the scraper 247 rises, the scraper 247 pushes open the movable blade 244 and the fixed blade 243, creating a gap between the movable blade 244 and the fixed blade 243. The top end of the scraper 247 is located above the movable blade 244 and the fixed blade 243, so that the tip of the scraper 247 is in contact with the inner top wall of the kettle body 1, avoiding the upper stirring blade 24 from contacting the inner top wall.

[0061] The control mechanism includes a push rod 245 and a pressure rod 246. An installation hole is provided on the connecting ring, and the top of the installation hole is open. The pressure rod 246 is slidably installed in the installation hole, and the top end of the pressure rod 246 protrudes from the top end of the connecting ring. The middle of the push rod 245 is rotatably installed on the fixed blade 243, and a torsion spring is installed at the hinge for resetting the push rod 245 under the action of the torsion spring. A notch is provided at one end of the push rod 245. A sliding shaft is fixedly provided at the bottom of the scraper 247, and the sliding shaft is slidably and rotatably installed in the notch. The other end of the push rod 245 abuts against the bottom end of the pressure rod 246. Therefore, when the upper stirring blade 24 rises to the top, the pressure rod 246 abuts against the inner top wall of the kettle body 1, so that the pressure rod 246 presses down one end of the push rod 245, causing the other end of the push rod 245 to tilt up, raising the sliding shaft and the scraper 247. The scraper 247 pushes open the movable blade 244 and the fixed blade 243, creating a gap between the movable blade 244 and the fixed blade 243, making the top end of the scraper 247 exceed the top end of the upper stirring blade 24, and bringing the scraper 247 into contact with the inner top wall of the kettle body 1, so as to scrape the materials adhering to the inner top wall of the kettle body 1.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A precipitation kettle for rapid precipitation, comprising a kettle body (1) and a stirring mechanism (2) arranged in the kettle body (1), characterized in that, The stirring mechanism (2) includes: A driving rod (21), rotatably installed on the axis inside the kettle body (1); A lifting mechanism (22), installed on the driving rod (21), the lifting mechanism (22) includes two lifting rings (221) sleeved on the driving rod (21) and a driving component for driving the two lifting rings (221) to move relative to each other; A lower stirring blade (23), fixedly installed on the lower lifting ring (221); An upper stirring blade (24), rotatably installed on the upper lifting ring (221) with the axis of the driving rod (21) as the rotation axis. A limiting structure (241) for restricting the relative rotation angle between the two is installed between the upper stirring blade (24) and the lifting ring (221), and a resetting member (242) is installed between the upper stirring blade (24) and the lifting ring (221); During the stirring operation, the upper stirring blade (24) and the lower stirring blade (23) are respectively in contact with the upper and lower inner walls of the kettle body (1), so as to prevent materials from adhering. When cleaning the upper stirring blade (24) after the stirring is completed, the driving rod (21) does not stop rotating, and the lifting mechanism (22) makes the two lifting rings (221) approach each other, so that one side of the upper stirring blade (24) is tangent to the lower stirring blade (23). Then the driving rod (21) stops rotating, the two lifting rings (221) move away from each other, the resetting member (242) resets the upper stirring blade (24), the two lifting rings (221) approach each other again, and the other side of the stirring blade is tangent to the lower stirring blade (23).

2. The precipitation kettle for rapid precipitation according to claim 1, wherein The number of the lower stirring blades (23) is two, which are located on the same plane and are eccentrically arranged with respect to the axis of the driving rod (21). The distance from the plane where the side of the lower stirring blade (23) close to the axis of the driving rod (21) is located to the axis is x.

3. The precipitation kettle for rapid precipitation according to claim 2, wherein, The number of the upper stirring blades (24) is two, which are connected together by a connecting ring. The two upper stirring blades (24) are located on the same plane, and in the radial direction of the driving rod (21), the thickness of the upper stirring blade (24) is equal to 2x.

4. The stripping kettle for rapid stripping according to claim 3, characterized in that, A guiding groove is provided on the driving rod (21) along its length direction, and guiding bars matched with the guiding groove are arranged in the two lifting rings (221).

5. The precipitation kettle for rapid precipitation according to claim 4, characterized in that, Through holes are provided at the top and middle of the driving rod (21). The driving component includes a winding device installed inside the driving rod (21). Ropes (222) are wound on the two output ends of the winding device. The two ropes (222) respectively pass through the two through holes of the driving rod (21) and are respectively connected to the two lifting rings (221).

6. The precipitation kettle for rapid precipitation according to claim 5, characterized in that, The limiting structure (241) includes an arc-shaped sliding groove opened on the outer circumferential surface of the upper lifting ring (221). A sliding block adapted to the arc-shaped sliding groove is provided on the upper stirring blade (24). The central angle of the movement of the sliding block relative to the lifting ring (221) in the arc-shaped sliding groove is 180°.

7. The precipitation kettle for rapid precipitation according to claim 6, characterized in that, The resetting member (242) is a torsion spring. The torsion spring is sleeved on the lifting ring (221), and the two ends of the torsion spring are respectively connected to the lifting ring (221) and the upper stirring blade (24).

8. The stripping kettle for rapid stripping according to any one of claims 3-7, characterized in that, The upper stirring blade (24) is composed of a fixed blade (243) and a movable blade (244) that are attached to each other. The fixed blade (243) is fixedly connected to the connecting ring. The movable blade (244) is slidably connected to the fixed blade (243) and magnetically connected therebetween, so that a gap can appear between the two. A receiving groove is formed between the fixed blade (243) and the movable blade (244). A scraper (247) is installed in the receiving groove, and a control mechanism for controlling the lifting of the scraper (247) is installed in the receiving groove. When the scraper (247) rises, the scraper (247) pushes open the movable blade (244) and the fixed blade (243), causing a gap to appear between the movable blade (244) and the fixed blade (243). The top end of the scraper (247) is located above the movable blade (244) and the fixed blade (243).

9. The stripping kettle for rapid stripping according to claim 8, characterized in that, A vertical groove is provided on one side of the fixed blade (243) close to the movable blade (244). A vertical strip adapted to the vertical groove is provided on the scraper (247).

10. The stripping kettle for rapid stripping according to claim 8, wherein, The control mechanism includes a top rod (245) and a pressure rod (246). The middle of the top rod (245) is hinged to the fixed blade (243). A notch is provided at one end of the top rod (245). A sliding shaft adapted to the notch is fixedly provided at the bottom of the scraper (247). The other end of the top rod (245) abuts against the bottom of the pressure rod (246). The top end of the pressure rod (246) extends out of the top end of the connecting ring and can abut against the inner top of the kettle body (1).

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