A coreless twin-blade combined stirred kettle suitable for mixing viscous systems

Abstract

The present invention discloses a coreless double-paddle combined stirring kettle suitable for mixing viscous systems. It comprises an upper stirring mechanism, a lower stirring mechanism, a stirring shell, a motor and a bottom bearing; the bottom bearing is arranged on a site for stirring, the stirring shell is arranged on the bottom bearing and the bottom of the stirring shell is fixedly connected to the bottom bearing, the upper stirring mechanism, the lower stirring mechanism and the bottom bearing are sequentially installed from top to bottom, the upper stirring mechanism and the lower stirring mechanism are arranged in the stirring shell, the motor is installed at the upper end of the upper stirring mechanism and the motor is located outside the upper end of the stirring shell. The present invention adopts a coreless shaft, eliminates the "climbing pole" effect under the operation of a high viscosity system, and has good wide adaptability; the design of the upper stirring paddle improves the mixing effect in the tank, and the design of the lower stirring paddle avoids wall adhesion and discharge siltation of high viscosity mixtures; the present invention also has the advantages of easy disassembly and replacement and high equipment strength.

Description

Technical Field

[0001] The invention relates to a stirring device, in particular to a coreless double-blade combined stirring kettle suitable for mixing viscous systems. Background Art

[0002] The mixing process of viscous systems is widely used in the production of products in the fields of biology, medicine, electronics, etc., and the mixing effect will have a huge impact on the value of the product. It is particularly important to point out that as the reaction proceeds, the reaction system often changes from low viscosity to high viscosity, and the large viscosity change further increases the difficulty of the reaction. The stirring kettle is the core functional component of the polymerization reaction equipment, but the traditional stirring kettle is often only suitable for high viscosity or low viscosity systems. The use of traditional stirring kettles in variable viscosity systems will not only cause the mixing quality to decline and the by-products to increase, but even lead to safety accidents in severe cases. In addition, the "climbing pole" effect and high shear problems of traditional shaft-type stirring kettles in high viscosity systems lead to poor mass transfer effects and easy damage to the equipment. Therefore, it is urgent to develop a new type of efficient stirring kettle suitable for the mixing process of viscous systems. Summary of the invention

[0003] The object of the present invention is to provide a coreless double-blade combined stirring kettle suitable for mixing viscous systems, so as to achieve safe, energy-saving and efficient production of products under high-viscosity and variable-viscosity conditions.

[0004] The present invention adopts the following technical solution:

[0005] A coreless double-blade combined stirring kettle suitable for mixing viscous systems comprises an upper stirring mechanism, a lower stirring mechanism, a stirring shell, a motor and a bottom bearing; the bottom bearing is arranged on a site for stirring, the stirring shell is arranged on the bottom bearing and the bottom of the stirring shell is fixedly connected to the bottom bearing, the upper stirring mechanism, the lower stirring mechanism and the bottom bearing are installed in sequence from top to bottom, the upper stirring mechanism and the lower stirring mechanism are arranged in the stirring shell, the motor is installed at the upper end of the upper stirring mechanism and the motor is located outside the upper end of the stirring shell.

[0006] The upper stirring mechanism includes an upper stirring shaft, an upper sleeve, an upper stirring component and a reinforcing component; the upper stirring shaft is hinged to the transmission shaft of the motor through a bearing, the outer fixed sleeve of the upper stirring shaft is provided with an upper sleeve, the reinforcing component is arranged on the outer periphery of the upper sleeve, and the upper part of the reinforcing component is fixedly connected to the upper part of the upper sleeve, the upper stirring component is arranged below the reinforcing component, and the upper part of the upper stirring component is respectively fixedly connected to the lower part of the upper sleeve and the lower part of the reinforcing component, and the lower part of the upper stirring component is fixedly connected to the lower stirring mechanism.

[0007] The reinforcing component includes a plurality of reinforcing plates and a plurality of reinforcing shafts; one end of each of the reinforcing plates is vertically fixedly connected to the upper part of the upper sleeve, and the reinforcing plates are evenly spaced along the outer circumference of the upper sleeve; the upper end of each of the reinforcing shafts is vertically fixedly connected to the lower side of the other end of each of the reinforcing plates, and the lower end of each of the reinforcing shafts is fixedly connected to the upper part of the upper stirring component.

[0008] The upper stirring component includes a plurality of stirring frames and a plurality of upper stirring paddles; each stirring frame is provided with a plurality of upper stirring paddles, and each stirring frame includes a vertical shaft and two cross beams; the upper and lower ends of the vertical shaft are respectively fixedly connected via one end of a respective cross beam, and the other ends of the two cross beams are respectively vertically fixedly connected to the lower part of the upper sleeve and the upper part of the lower stirring mechanism, and the upper end of the vertical shaft is also fixedly connected to the lower end of the reinforcing shaft;

[0009] The vertical axes of the stirring frames are arranged parallel to the upper stirring shaft and are evenly spaced around the circumference of the upper stirring shaft;

[0010] Each vertical shaft is arranged with a number of upper stirring paddles on both inner and outer sides in the radial direction, the outer upper stirring paddle is an outer blade, and the inner upper stirring paddle is an inner blade, N outer blades are arranged on the outer side of each vertical shaft, and the N outer blades are evenly spaced along the axial direction of the vertical shaft, and N-1 inner blades are arranged on the inner side of each vertical shaft, and the N-1 inner blades are evenly spaced along the axial direction of the vertical shaft, and the outer blades and the inner blades are alternately arranged in sequence along the axial direction of the vertical shaft, and an inner blade is arranged between every two outer blades.

[0011] The inner blades and the outer blades are arranged non-horizontally and tilted, and the inner blades and the outer blades are tilted in opposite directions.

[0012] The lower stirring mechanism includes a lower stirring shaft, a lower shaft sleeve and a plurality of lower stirring paddles; the upper portion of the lower stirring shaft is fixedly connected to a plurality of lower cross beams of the upper stirring component, the outer fixed sleeve of the lower stirring shaft is provided with a lower shaft sleeve, the lower end of the lower stirring shaft is vertically movably connected to the bottom bearing, one side of each of the lower stirring paddles is respectively vertically fixedly connected to the lower shaft sleeve, and the lower stirring paddles are evenly spaced along the outer circumference of the lower shaft sleeve.

[0013] The vertical cross-section of each lower stirring paddle is an inverted right-angled trapezoid, and the right-angled side of the lower stirring paddle is vertically connected to the lower shaft sleeve; each lower stirring paddle is provided with multiple groups of grids, and the total area of ​​the grids provided on each lower stirring paddle accounts for 30-50% of the area of ​​the corresponding lower stirring paddle.

[0014] The coreless double-blade combined stirring kettle suitable for mixing viscous systems also includes a control system, which is electrically connected to the motor.

[0015] The stirring shell is divided into an upper cylindrical hollow shell and a lower conical hollow shell; the upper cylindrical hollow shell and the lower conical hollow shell are fixedly connected, an upper stirring mechanism is arranged in the upper cylindrical hollow shell, the motor is arranged outside the upper end of the upper cylindrical hollow shell, the lower end of the lower conical hollow shell is fixedly installed on the bottom bearing, and the lower stirring mechanism is arranged in the lower conical hollow shell.

[0016] The innovation of the present invention is that the stirring kettle adopts a coreless wide-width combined structure, in which the stirring frame crossbeam and the vertical axis are connected by flanges, and both the upper stirring paddle and the lower stirring paddle are detachable. The upper stirring paddle is composed of a plurality of groups of outer blades and inner blades, and the lower stirring paddle has a plurality of groups of symmetrical grids, so that the upper stirring mechanism forms a large axial circulation that runs through the inside and outside when working, and at the same time, the lower stirring paddle is convenient for refining the shear fluid, effectively avoiding the occurrence of stirring blind spots and reducing the occurrence of wall material adhesion. The design of the entire structure makes the stirring kettle have a wide adaptability, and achieves good stirring and mixing effects in variable viscosity and high viscosity systems, while bringing the advantage of effectively avoiding the "pole climbing" effect in high viscosity systems, and the device can be easily disassembled and replaced according to the working conditions, and a reinforcing plate is also provided above the stirring frame to improve the rigidity of the device.

[0017] The present invention has the following beneficial effects:

[0018] 1. Wide adaptability. The wide-width combined structure without a core shaft can achieve good mixing effects in variable viscosity and high viscosity systems, and can effectively avoid the "climbing pole" effect in high viscosity systems.

[0019] 2. Good mass transfer and dispersion effects. The upper stirring paddle is composed of multiple groups of outer blades and inner blades, forming a large axial circulation that runs through the inside and outside during operation; the lower stirring paddle has multiple groups of symmetrical grids, which is convenient for refining the shear fluid, and the shape of the paddle is the same as the bottom of the stirring shell and the gap is very small, which reduces the occurrence of wall material adhesion.

[0020] 3. Easy to disassemble and high structural strength. The mixing frame crossbeam and vertical axis are connected by flanges, and the mixing frame is welded and fixed on the mixing shaft. Therefore, the upper stirring paddle can be easily disassembled and replaced according to the working conditions; a reinforcement plate is set above the mixing frame to improve the rigidity of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall structural diagram of the device of the present invention except the motor and the housing;

[0022] Figure 2 It is a diagram of the overall structure of the device of the present invention without the housing except for the motor;

[0023] Figure 3It is a structural diagram of the stirring mechanism of the present invention;

[0024] Figure 4 It is a structural diagram of the lower stirring mechanism and the bottom bearing of the present invention.

[0025] In the figure: 1, stirring shell, 2, upper stirring shaft, 3, upper shaft sleeve, 4, stirring frame, 4.1, cross beam, 4.2, vertical shaft, 5, reinforcement plate, 6, reinforcement shaft, 7, upper stirring paddle, 7.1, outer blade, 7.2, inner blade, 8, lower stirring shaft, 9, lower shaft sleeve, 10, lower stirring paddle, 11, bottom bearing. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0027] In the present invention, unless otherwise specified, directional words such as “up, down, left, right” refer to directions shown in the accompanying drawings, and “inside and outside” refer to inside and outside relative to the contour of the component itself.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the coreless double-blade combined stirring kettle suitable for mixing viscous systems of the present invention comprises: an upper stirring mechanism, a lower stirring mechanism, a stirring shell 1, a motor and a bottom bearing 11; the bottom bearing 11 is arranged on a site for stirring, the stirring shell 1 is arranged on the bottom bearing and the bottom of the stirring shell 1 is welded and fixedly connected to the bottom bearing 11, the upper stirring mechanism, the lower stirring mechanism and the bottom bearing 11 are installed in sequence from top to bottom, the upper stirring mechanism and the lower stirring mechanism are arranged in the stirring shell 1, the motor is installed at the upper end of the upper stirring mechanism and the motor is located outside the upper end of the stirring shell 1.

[0029] The upper stirring mechanism includes an upper stirring shaft 2, an upper sleeve 3, an upper stirring component and a reinforcing component; the upper stirring shaft 2 is connected to the transmission shaft of the motor through a bearing, the outer fixed sleeve of the upper stirring shaft 2 is provided with an upper sleeve 3, the reinforcing component is arranged on the outer periphery of the upper sleeve 3, and the upper part of the reinforcing component is welded and fixedly connected to the upper part of the upper sleeve 3, the upper stirring component is arranged below the reinforcing component, and the upper part of the upper stirring component is respectively fixedly connected to the lower part of the upper sleeve 3 and the lower part of the reinforcing component, and the lower part of the upper stirring component is fixedly connected to the lower stirring mechanism.

[0030] The reinforcing component includes a plurality of reinforcing plates 5 and a plurality of reinforcing shafts 6; one end of each reinforcing plate 5 along the length direction is vertically welded and fixedly connected to the upper part of the upper sleeve 3, and the reinforcing plates 5 are evenly spaced along the circumferential direction of the outer circumference of the upper sleeve 3; the upper end of each reinforcing shaft 6 is detachably fixedly connected to the lower vertical flange of the other end of the corresponding reinforcing plate 5, and the lower end of each reinforcing shaft 6 is detachably fixedly connected to the upper flange of the upper stirring component.

[0031] The upper stirring component includes a plurality of stirring frames 4 and a plurality of upper stirring paddles 7; each stirring frame 4 is provided with a plurality of upper stirring paddles 7, and each stirring frame 4 includes a vertical shaft 4.2 and two cross beams 4.1; the upper and lower ends of the vertical shaft 4.2 are respectively detachably fixedly connected through the flange at one end of each cross beam 4.1, so as to facilitate replacement of the upper stirring paddle 7 as required, and the other ends of the two cross beams 4.1 are respectively vertically fixedly connected to the lower part of the upper sleeve 3 and the upper part of the lower stirring mechanism, and at the same time, the upper end of the vertical shaft 4.2 is also detachably fixedly connected to the lower end flange of the reinforcing shaft 6, so as to facilitate replacement of the upper stirring paddle 7 as required.

[0032] The vertical axes 4.2 of each stirring frame 4 are arranged vertically parallel to the upper stirring shaft 2 and are evenly spaced around the circumference of the upper stirring shaft 2. The cross beams 4.1 on the upper side of each stirring frame 4 are evenly spaced along the circumference of the lower part of the upper shaft sleeve 3. The cross beams 4.1 on the lower side of each stirring frame 4 are evenly spaced along the circumference of the upper stirring shaft 3.

[0033] Each vertical shaft 4.2 is arranged with a plurality of upper stirring paddles 7 on both inner and outer sides in the radial direction, the inner side is close to the axial direction of the upper stirring shaft 3, and the outer side is far away from the axial direction of the upper stirring shaft 3. The upper stirring paddle 7 on the outer side is an outer blade 7.1, and the upper stirring paddle 7 on the inner side is an inner blade 7.2. N outer blades 7.1 are arranged on the outer side of each vertical shaft 4.2, and the N outer blades 7.1 are evenly spaced along the axial direction of the vertical shaft 4.2. N-1 inner blades 7.2 are arranged on the inner side of each vertical shaft 4.2, and the N-1 inner blades 7.2 are evenly spaced along the axial direction of the vertical shaft 4.2. The outer blades 7.1 and the inner blades 7.2 are alternately arranged in sequence along the axial direction of the vertical shaft 4.2, and an inner blade 7.2 is arranged between every two outer blades 7.1.

[0034] The inner blades 7.2 and the outer blades 7.1 are arranged non-horizontally and tilted, and the inner blades 7.2 and the outer blades 7.1 tilt in opposite directions.

[0035] In a specific implementation, the outer blade 7.1 is of an upward type, and the inner blade 7.2 is of a downward type. The length of the outer blade 7.1 is 0.2 to 0.3 times the diameter of the stirring tank, and the length of the inner blade 7.2 is 0.1 to 0.2 times the diameter of the stirring tank. The inclination angle of the outer blade 7.1 and the inner blade 7.2 can be adjusted within a range of 30° to 60°.

[0036] The upper stirring paddle 7 is detachably fixed on the vertical shaft 4.2 of the stirring frame 4. The inner blade 7.2 on the inner side of the vertical shaft 4.2 and the outer blade 7.1 on the outer side form a large circulation that is connected inside and outside during operation, thereby improving the mass transfer and dispersion effects.

[0037] The upper stirring mechanism of the device of the present invention adopts a coreless structure, which eliminates the "climbing pole" effect under high viscosity systems, and the number of blades of the inner and outer upper stirring paddles 7 can be changed according to working conditions.

[0038] The lower stirring mechanism includes a lower stirring shaft 8, a lower shaft sleeve 9 and a plurality of lower stirring paddles 10; the upper portion of the lower stirring shaft 8 is fixedly connected to a plurality of lower side cross beams 4.1 of the upper stirring component, and a plurality of lower side cross beams 4.1 are fixedly connected to the upper portion of the lower stirring shaft 8 at uniform intervals along the circumferential direction, the outer fixed sleeve of the lower stirring shaft 8 is provided with a lower shaft sleeve 9, the lower end of the lower stirring shaft 8 is vertically movably connected to a bottom bearing 11, one side of each lower stirring paddle 10 is respectively fixedly connected to a vertically detachable slot of the lower shaft sleeve 9, and each lower stirring paddle 10 is evenly spaced circumferentially arranged along the outer circumference of the lower shaft sleeve 9.

[0039] The vertical cross-section of each lower stirring paddle 10 is an inverted right-angled trapezoid, and the right-angled side of the lower stirring paddle 10 is vertically connected to the lower shaft sleeve 9, that is, the lower stirring paddle 10 is arranged radially and its right-angled side is fixed to the outer wall of the lower shaft sleeve 9; each lower stirring paddle 10 is provided with a plurality of groups of grids, which is conducive to the formation of fluid circulation, and the number and size of the grids can be determined according to the specific working conditions. The total area of ​​the grids provided on each lower stirring paddle 10 accounts for 30-50% of the area of ​​the corresponding lower stirring paddle 10, and the number of the lower stirring paddles 10 can also be adjusted according to the actual material viscosity. The shape of the lower stirring paddle 10 is the same as the shape of the bottom of the stirring shell 1 and the gap is very small, and a "wall scraping" effect occurs during operation, which can effectively reduce wall deposition and improve the mixing effect.

[0040] The coreless double-blade combined stirring kettle suitable for mixing viscous systems also includes a control system, which is electrically connected to a motor, and the rotation speed can be adjusted by the motor.

[0041] The stirring shell 1 is divided into an upper cylindrical hollow shell and a lower conical hollow shell; the upper cylindrical hollow shell and the lower conical hollow shell are welded and fixedly connected, an upper stirring mechanism is arranged in the upper cylindrical hollow shell, a motor is arranged outside the upper end of the upper cylindrical hollow shell, the lower end of the lower conical hollow shell is fixedly mounted on a bottom bearing 11, and a lower stirring mechanism is arranged in the lower conical hollow shell.

[0042] The stirring tank working process of the present invention is as follows:

[0043] When the stirring kettle is working, the control system controls the transmission shaft of the motor to rotate, and the transmission shaft drives the upper stirring shaft 2 to rotate, and the upper stirring shaft 2 thereby drives the upper stirring mechanism and the lower stirring mechanism to rotate together;

[0044] When the stirring kettle stops working, the control system does not control the transmission shaft of the motor to rotate, so that the upper stirring mechanism and the lower stirring mechanism stop rotating together.

[0045] The overall installation process of the device of the present invention is as follows:

[0046] First, the reinforcing plate 5 and the upper crossbeam 4.1 are uniformly welded and fixed to the upper sleeve 3 along the outer circumference of the upper sleeve 3. The upper and lower sides of the reinforcing shaft 6 are respectively connected to the reinforcing plate 5 and the upper crossbeam 4.1 with bolts, and the upper sleeve 3 is fixed to the upper stirring shaft 2 with bolts.

[0047] Then, the inner blades 7.2 and the outer blades 7.1 of the upper stirring paddle 7 of the determined type and number are respectively welded and fixed on both sides of the vertical shaft 4.2, and the vertical shaft 4.2 is connected to the upper crossbeam 4.1 by bolts.

[0048] Next, the determined type and number of lower stirring paddles 10 are welded and fixed to the lower sleeve 9, the lower sleeve 9 is connected to the lower stirring shaft 8 by bolts, the lower stirring shaft 8 is welded and fixed to the lower crossbeam 4.1, and the lower crossbeam 4.1 is connected to the vertical shaft 4.2 by bolts.

[0049] Finally, after the internal structure of the stirring kettle is installed, the internal structure of the stirring kettle is hoisted as a whole into the stirring shell 1 by a crane until the lower end of the lower stirring shaft 8 is located in the bottom bearing 11 .

[0050] The specific embodiments of the present invention are as follows: Example 1

[0051] The device of the present invention is used to stir and prepare polydimethylsiloxane material. As an important silicone rubber material, polydimethylsiloxane is widely used in the fields of sealing, coating, construction, etc. due to its advantages such as high elasticity, temperature resistance, easy modification, and low price.

[0052] S1 Mixing: 80 kg of the pre-prepared dimethylsiloxane ring body and 1.5 kg of alkali glue are added into a stirred tank of the present invention with a volume of 120 L.

[0053] S2 reaction: After step S1 is completed, the stirring kettle is heated. When the temperature rises to 100°C, a proper amount of water vapor is introduced into the stirring kettle according to the viscosity of the desired product, and the temperature in the stirring kettle is maintained at about 120°C for about 2 hours.

[0054] S3 Decomposition: After step S2 is completed, the stirring kettle is further heated to 180°C. After the catalyst is fully decomposed, the introduction of water vapor into the stirring kettle is stopped.

[0055] S4 impurity removal: After step S3 is completed, a sufficient amount of N2 is introduced into the stirring kettle for about 3.5 hours. After the oligomers in the stirring kettle are completely removed, the polydimethylsiloxane with the required specific viscosity can be obtained.

[0056] Comparative Example 1

[0057] The difference between this comparative example 1 and the example is that a conventional frame-type paddle stirred kettle is used, and the rest is the same as that of the example 1.

[0058] Comparative Example 2

[0059] The difference between this comparative example 2 and the embodiment is that a conventional anchor-type paddle stirred kettle is used, and the rest is the same as the embodiment.

[0060] Dispersion test

[0061] The polydimethylsiloxane products obtained in Example 1 and Comparative Examples 1 and 2 were subjected to gel permeation chromatography (GPC) to obtain the polymer dispersibility index (PDI) of each group of products. Each group of samples was tested three times, and the average value of the three test results was taken as the polymer dispersibility index of the group of products.

[0062] The implementation conditions and test results of each group of tests are shown in Table 1.

[0063] Table 1

[0064] Dimethylsiloxane ring body (kg) Alkali rubber (kg) Stirred tank type Polymer Dispersibility Index (PDI) Example 80 1.5 The present invention 1.65 Comparative Example 1 80 1.5 Frame type stirring kettle 1.85 Comparative Example 2 80 1.5 Anchor type stirred tank 1.81

[0065] Results Analysis

[0066] Analysis of Comparative Example 1 and the embodiment shows that the polymer dispersion effect of the embodiment is better than that of Comparative Example 1, which proves that the stirred tank of the present invention can effectively improve the mixing effect of the reaction system compared with the traditional frame stirred tank, and the molecular weight distribution of the prepared polydimethylsiloxane is more concentrated.

[0067] Analysis of Comparative Example 2 and Example shows that the polymer dispersion effect of Example is better than that of Comparative Example 1, which proves that the stirring kettle of the present invention can effectively improve the mixing effect of the reaction system compared with the traditional anchor stirring kettle, and the molecular weight distribution of the prepared polydimethylsiloxane is more concentrated.

[0068] In summary, the present invention provides a coreless double-blade combined stirring kettle suitable for mixing viscous systems. Compared with the frame-type stirring kettle and anchor-type stirring kettle commonly used in traditional high-viscosity systems, it can effectively improve the mixing effect and make the molecular weight distribution of the prepared silicone product more concentrated.

[0069] The innovation of the present invention is that the stirring kettle adopts a coreless wide-width combined structure, in which the stirring frame crossbeam and the vertical axis are connected by flanges, and both the upper stirring paddle and the lower stirring paddle are detachable. The upper stirring paddle is composed of a plurality of groups of outer blades and inner blades, and the lower stirring paddle has a plurality of groups of symmetrical grids, so that the upper stirring mechanism forms a large axial circulation that runs through the inside and outside when working, and at the same time, the lower stirring paddle is convenient for refining the shear fluid, effectively avoiding the occurrence of stirring blind spots and reducing the occurrence of wall material adhesion. The design of the entire structure makes the stirring kettle have a wide adaptability, and achieves good stirring and mixing effects in variable viscosity and high viscosity systems, while bringing the advantage of effectively avoiding the "pole climbing" effect in high viscosity systems, and the device can be easily disassembled and replaced according to the working conditions, and a reinforcing plate is also provided above the stirring frame to improve the rigidity of the device.

Claims

1. A coreless double-blade combined stirred tank suitable for mixing viscous systems, characterized in that: The invention comprises an upper stirring mechanism, a lower stirring mechanism, a stirring shell (1), a motor and a bottom bearing (11); the bottom bearing (11) is arranged on a stirring site, the stirring shell (1) is arranged on the bottom bearing and the bottom of the stirring shell (1) is fixedly connected to the bottom bearing (11); the upper stirring mechanism, the lower stirring mechanism and the bottom bearing (11) are installed in sequence from top to bottom; the upper stirring mechanism and the lower stirring mechanism are arranged in the stirring shell (1); the motor is installed at the upper end of the upper stirring mechanism and the motor is located outside the upper end of the stirring shell (1); The upper stirring mechanism comprises an upper stirring shaft (2), an upper shaft sleeve (3), an upper stirring component and a reinforcing component; the upper stirring shaft (2) is drivingly connected to a transmission shaft of a motor via a bearing; an outer fixed sleeve of the upper stirring shaft (2) has an upper shaft sleeve (3); the reinforcing component is arranged on the outer periphery of the upper shaft sleeve (3), and the upper part of the reinforcing component is fixedly connected to the upper part of the upper shaft sleeve (3); the upper stirring component is arranged below the reinforcing component, and the upper part of the upper stirring component is respectively fixedly connected to the lower part of the upper shaft sleeve (3) and the lower part of the reinforcing component; and the lower part of the upper stirring component is fixedly connected to the lower stirring mechanism; The reinforcing component comprises a plurality of reinforcing plates (5) and a plurality of reinforcing shafts (6); one end of each of the reinforcing plates (5) is vertically fixedly connected to the upper part of the upper shaft sleeve (3), and the reinforcing plates (5) are evenly spaced along the outer circumference of the upper shaft sleeve (3); the upper end of each of the reinforcing shafts (6) is vertically fixedly connected to the lower side of the other end of each of the reinforcing plates (5), and the lower end of each of the reinforcing shafts (6) is fixedly connected to the upper part of the upper stirring component.

2. The coreless double-blade combined stirred kettle suitable for mixing viscous systems according to claim 1, characterized in that: The upper stirring component comprises a plurality of stirring frames (4) and a plurality of upper stirring paddles (7); each stirring frame (4) is provided with a plurality of upper stirring paddles (7); each stirring frame (4) comprises a vertical shaft (4.2) and two cross beams (4.1); the upper and lower ends of the vertical shaft (4.2) are respectively fixedly connected via one end of a respective cross beam (4.1); the other ends of the two cross beams (4.1) are respectively vertically fixedly connected to the lower part of the upper shaft sleeve (3) and the upper part of the lower stirring mechanism; and the upper end of the vertical shaft (4.2) is also fixedly connected to the lower end of the reinforcing shaft (6); The vertical axis (4.2) of each stirring frame (4) is arranged parallel to the upper stirring axis (2) and is evenly spaced around the circumference of the upper stirring axis (2); each vertical axis (4.2) is provided with a plurality of upper stirring paddles (7) on both inner and outer sides in the radial direction, the outer upper stirring paddle (7) is an outer paddle blade (7.1), and the inner upper stirring paddle (7) is an inner paddle blade (7.2), and each vertical axis (4.2) is provided with N outer paddle blades (7.1) on the outer side, N The outer blades (7.1) are evenly spaced along the axial direction of the vertical axis (4.2), and N-1 inner blades (7.2) are arranged on the inner side of each vertical axis (4.2). The N-1 inner blades (7.2) are evenly spaced along the axial direction of the vertical axis (4.2), and the outer blades (7.1) and the inner blades (7.2) are alternately arranged in sequence along the axial direction of the vertical axis (4.2), and an inner blade (7.2) is arranged between every two outer blades (7.1).

3. The coreless double-blade combined stirred kettle suitable for mixing viscous systems according to claim 2, characterized in that: The inner blades (7.2) and the outer blades (7.1) are arranged non-horizontally and tilted, and the inner blades (7.2) and the outer blades (7.1) are tilted in opposite directions.

4. The coreless double-blade combined stirred kettle suitable for mixing viscous systems according to claim 2, characterized in that: The lower stirring mechanism comprises a lower stirring shaft (8), a lower shaft sleeve (9) and a plurality of lower stirring paddles (10); the upper portion of the lower stirring shaft (8) is fixedly connected to a plurality of lower side cross beams (4.1) of the upper stirring component; the outer fixed sleeve of the lower stirring shaft (8) has a lower shaft sleeve (9); the lower end of the lower stirring shaft (8) is vertically movably connected to a bottom bearing (11); one side of each of the lower stirring paddles (10) is respectively vertically fixedly connected to the lower shaft sleeve (9); and the lower stirring paddles (10) are evenly spaced along the outer circumference of the lower shaft sleeve (9).

5. The coreless double-blade combined stirred kettle suitable for mixing viscous systems according to claim 4, characterized in that: The vertical cross-section of each lower stirring paddle (10) is an inverted right-angled trapezoid, and the right-angled side of the lower stirring paddle (10) is vertically connected to the lower shaft sleeve (9); each lower stirring paddle (10) is provided with a plurality of groups of grids, and the total area of ​​the grids provided on each lower stirring paddle (10) accounts for 30% to 50% of the area of ​​the corresponding lower stirring paddle (10).

6. The coreless double-blade combined stirred kettle suitable for mixing viscous systems according to claim 1, characterized in that: The coreless double-blade combined stirring kettle suitable for mixing viscous systems also includes a control system, which is electrically connected to the motor.

7. The coreless double-blade combined stirred kettle suitable for mixing viscous systems according to claim 1, characterized in that: The stirring shell (1) is divided into an upper cylindrical hollow shell and a lower conical hollow shell; The upper cylindrical hollow shell and the lower conical hollow shell are fixedly connected, an upper stirring mechanism is arranged inside the upper cylindrical hollow shell, the motor is arranged outside the upper end of the upper cylindrical hollow shell, the lower end of the lower conical hollow shell is fixedly mounted on a bottom bearing (11), and the lower stirring mechanism is arranged inside the lower conical hollow shell.

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