Composite stirring paddle and double-cooling combined device and processing technology thereof

Abstract

The invention discloses a composite stirring paddle which comprises a shaft sleeve, a first cooling stirring main paddle fixed on the lower section of the shaft sleeve, and a second cooling stirring main paddle fixed on the upper section of the shaft sleeve, a first reinforcing rod is arranged between the first cooling and stirring main paddle and the shaft sleeve, and a plurality of first cooling and stirring auxiliary paddles are arranged at the bottom of the first cooling and stirring main paddle; a second reinforcing rod is arranged between the second cooling and stirring main paddle and the shaft sleeve, and a plurality of second cooling and stirring auxiliary paddles are arranged at the top of the second cooling and stirring main paddle. According to the composite stirring paddle with the structure, materials are subjected to shearing, overturning and throwing composite motion, so that the heat of the materials is quickly dissipated. The invention further discloses a double-cooling combined device and a processing technology thereof, the composite stirring paddle in the device is combined with the cooling ring and the external cooling interlayer to quickly cool the material, the material cooling uniformity is good, the cooling speed is high, the cooling time can be greatly shortened, and the cooling efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mixing and stirring, in particular to a composite stirring paddle, a double cooling combined device and a processing technology thereof. BACKGROUND

[0002] Mixing and stirring equipment is an indispensable equipment in industrial production, which is used to realize uniform mixing of various materials and is widely used in the fields of plastics, chemical industry, food, pharmaceuticals and the like.

[0003] The mixing and stirring equipment mainly includes a high-speed stirring and mixing machine and a low-speed cooling and stirring machine. The main process of using the high-speed stirring and mixing machine and the low-speed cooling and stirring machine is as follows: the weighed main materials and auxiliary materials are subjected to high-speed stirring and mixing by the high-speed stirring and mixing machine to obtain uniformly mixed materials. Since the high-speed stirring and mixing causes the temperature of the materials to rise, the temperature rise causes the materials to have stickiness and not to be easily outputted outward, so the low-speed cooling and stirring machine is needed to perform heat exchange to cool the materials, so that the materials can be smoothly fed to the next process.

[0004] The low-speed cooling and stirring machine is further divided into a vertical cooling and stirring machine and a horizontal cooling and stirring machine. The existing vertical cooling and stirring machine generally has the disadvantages of long cooling time, low cooling efficiency and poor cooling uniformity. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a composite stirring paddle capable of enabling materials to perform shear, overturning and parabolic compound motion. When the composite stirring paddle is used to stir the materials, the materials can be rapidly cooled.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: the composite stirring paddle comprises a shaft sleeve, a first cooling and stirring main paddle fixed on the shaft sleeve and a second cooling and stirring main paddle fixed on the shaft sleeve, wherein the first cooling and stirring main paddle and the second cooling and stirring main paddle are both fixed on the shaft sleeve by welding; vertical center surfaces of the first cooling and stirring main paddle and the second cooling and stirring main paddle and an axis of the shaft sleeve are all located in the same plane, and the first cooling and stirring main paddle is located on an outer circumferential wall of the upper half of the shaft sleeve, and the second cooling and stirring main paddle is located on an outer circumferential wall of the lower half of the shaft sleeve; a first reinforcing rod is arranged between the first cooling and stirring main paddle and the shaft sleeve, one end of the first reinforcing rod is fixedly connected to the bottom of the first cooling and stirring main paddle, and the other end of the first reinforcing rod is fixedly connected to the outer circumferential wall of the lower half of the shaft sleeve; a plurality of first cooling and stirring auxiliary paddles are uniformly and spacedly arranged inward from the outer end of the first cooling and stirring main paddle at the bottom of the first cooling and stirring main paddle; A second reinforcing rod is provided between the second cooling and stirring main impeller and the bushing. One end of the second reinforcing rod is fixedly connected to the top of the second cooling and stirring main impeller, and the other end of the second reinforcing rod is fixedly connected to the outer circumferential wall of the upper half of the bushing. Several second cooling and stirring auxiliary blades are evenly spaced at the top of the second cooling and stirring main blade, extending inward from the outer end of the second cooling and stirring main blade.

[0007] After the composite stirring paddle is processed and shaped, its balance is tested using a balance testing device. If the test results meet the condition that the balance accuracy level is ≤G40, the composite agitator is qualified. At this time, the mass distribution of each part of the composite agitator is uniform when rotating, which can improve the stability of the composite agitator rotation and reduce vibration. If the test results do not meet the condition of balance accuracy level ≤ G40, the outer end of the heavier side of the composite agitator should be adjusted by grinding or reducing weight by drilling chips, and the balance test should continue after adjustment.

[0008] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that the first cooling stirring main impeller is perpendicular to the bushing, and the second cooling stirring main impeller is perpendicular to the bushing. Both the first reinforcing rod and the second reinforcing rod are round rod structures, and the axis of the first reinforcing rod is in the same plane as the vertical center plane of the first cooling and stirring main impeller; the axis of the second reinforcing rod is in the same plane as the vertical center plane of the second cooling and stirring main impeller.

[0009] The surfaces of the first and second reinforcing bars are finely polished to reduce surface material accumulation.

[0010] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that the first cooling stirring main impeller has a flat plate structure, and the end of the first reinforcing rod and each of the first cooling stirring auxiliary impellers are disposed on the bottom surface of the first cooling stirring main impeller. One long side end face of the first cooling stirring main impeller is the first non-pushing end, and the other long side end face opposite to the first non-pushing end is the first pushing end; The first cooling and stirring paddle is set in an inclined direction, and the inclined direction gradually slopes downward from the first non-push end to the first push end. A first shearing surface is inclinedly provided on the top surface of the first cooling and stirring main impeller at the first pushing end, and the first shearing surface intersects with the first pushing end; a first bottom plane parallel to the horizontal plane is provided on the bottom surface of the first cooling and stirring main impeller at the first pushing end, and the first bottom plane intersects with the first pushing end. The second cooling and stirring main impeller has a flat plate structure, and the end of the second reinforcing rod and each of the second cooling and stirring auxiliary impellers are located on the top surface of the second cooling and stirring main impeller. One long side end face of the second cooling and stirring main impeller is the second non-pushing end, and the other long side end face opposite to the second non-pushing end is the second pushing end; The second cooling and stirring paddle is set in an inclined direction, and the inclined direction gradually slopes downward from the second non-push end to the second push end; A second shearing surface is inclinedly provided on the top surface of the second cooling and stirring main impeller at the second pushing end, and the second shearing surface intersects with the second pushing end; a second bottom plane parallel to the horizontal plane is provided on the bottom surface of the second cooling and stirring main impeller at the second pushing end, and the second bottom plane intersects with the second pushing end.

[0011] Spraying is performed on the first shear surface, the second shear surface, the top surface of the first cooling stirring main impeller, and the top surface of the second cooling stirring main impeller of the composite stirring impeller that have passed the balance test to obtain a WC-10Co-4Cr tungsten carbide alloy reinforcement layer. The thickness of the WC-10Co-4Cr tungsten carbide alloy reinforcement layer is 0.1 to 0.3 mm. The alloy-reinforced composite stirring paddle is subjected to rough grinding and polishing, fine grinding and polishing, and drying.

[0012] 4. A composite stirring paddle according to claim 3, characterized in that: the spraying speed used in the spraying operation is 1000-2200m / s, the flame temperature is 3000±10℃, the porosity is less than 10%, the density is 98%-99.8%, and the bonding strength between the coating and the substrate is 70-90Wpa. The steps for rough grinding and polishing, fine grinding and polishing, and drying of the alloy-reinforced composite stirring paddle are as follows: (1) Coarse grinding and polishing: Select 3P grinding stone, and the volume ratio of 3P grinding stone to the composite stirring paddle to be coarsely ground is 4:1; add grinding liquid and grind at high speed for 20 to 30 minutes to remove burrs and oxide scale from the surface of the composite stirring paddle. (2) Fine grinding and polishing: Take out the 3P grinding stone used for coarse grinding and polishing, put in a new 3P grinding stone, and the volume ratio of the 3P grinding stone to the composite stirring paddle to be coarsely ground is 6:1; add a brightener, grind at high speed for 20 to 30 minutes, so that the surface roughness of the composite stirring paddle is ≤0.8. (3) Drying: Use vibration drying technology to dry the surface of the composite stirring paddle at high speed for 10 to 15 minutes.

[0013] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that the tilt angle α1 of the first cooling stirring main impeller is 30±5°; and the tilt angle β1 of the first shear surface is 60±5°. The tilt angle α2 of the second cooling stirring impeller is 30±5°; the tilt angle β2 of the second shear surface is 60±5°.

[0014] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that: the thickness t1 of the first cooling stirring main impeller is 25±1mm; the end face height H1 of the first pushing end is 2.5±0.5mm; the length L1 of the first bottom plane is 5±0.5mm; and the outer end of the first cooling stirring main impeller has a first pushing angle θ1 of 5±1°. The thickness t2 of the second cooling and stirring main impeller is 25±1mm; the end face height H2 of the second pushing end is 2.5±0.5mm; the length L2 of the second bottom plane is 5±0.5mm; the outer end of the second cooling and stirring main impeller has a second pushing angle, and the second pushing angle θ2 is 5±1°.

[0015] Furthermore, in the aforementioned composite stirring paddle, a more preferred embodiment is that the end face of the first non-pushing end is an arc-shaped curved surface that bulges outward and smoothly transitions to the top and bottom surfaces of the first cooling stirring main paddle. The end face of the second non-push end is an arc-shaped outward protrusion that smoothly transitions to the top and bottom surfaces of the second cooling and stirring main impeller.

[0016] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that the first cooling stirring sub-impeller is a parallelogram plate structure, and both sides of the first cooling stirring sub-impeller are parallel to the axis of the bushing. The first cooling and stirring auxiliary paddle is set vertically relative to the horizontal plane, and the first cooling and stirring auxiliary paddle is set in an inclined direction relative to the vertical plane of the first cooling and stirring main paddle, and the inclined direction is gradually outward from the pushing end of the first cooling and stirring main paddle towards the non-pushing end. The second cooling and stirring sub-blade has a parallelogram plate structure; and both sides of the second cooling and stirring sub-blade are parallel to the axis of the bushing. The second cooling and stirring auxiliary paddle is set vertically relative to the horizontal plane, and the second cooling and stirring auxiliary paddle is set at an inclination relative to the vertical plane of the second cooling and stirring main paddle, and the inclination direction is gradually inward from the pushing end of the second cooling and stirring main paddle towards the non-pushing end.

[0017] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that the tilt angle γ1 of the first cooling stirring sub-impeller is 30±5°; and the tilt angle γ2 of the second cooling stirring sub-impeller is 30±5°.

[0018] Furthermore, in the aforementioned composite stirring impeller, a more preferred embodiment is that the first shear surface, the second shear surface, the top surface of the first cooling stirring main impeller, and the top surface of the second cooling stirring main impeller are the working surfaces of the first cooling stirring main impeller and the second cooling stirring main impeller, respectively. The working surfaces of the first cooling and stirring main impeller, the second cooling and stirring main impeller, and the bushing, all made of high-strength stainless steel, have a tungsten carbide alloy reinforcement layer.

[0019] Among them, high-strength stainless steel materials such as 304 / 316L.

[0020] To address the shortcomings of existing technologies, this invention also provides a dual cooling combination device that enables materials to undergo shearing, tumbling, and parabolic compound motions and achieve rapid cooling through dual heat exchange. This device is located in a vertical cooling mixer. When the device is used to stir the material, the compound stirring paddle causes the material to undergo shearing, tumbling, and parabolic compound motions, which quickly dissipates heat. Combined with internal and external dual cooling, it achieves rapid cooling with good cooling uniformity and fast cooling speed, which can greatly shorten the cooling time and greatly improve the cooling efficiency.

[0021] To achieve the above objectives, the technical solution adopted by the present invention is as follows: the dual cooling combination device includes: a mixing tank and a mixing device disposed in the mixing tank; the composite mixing blade on the mixing device is the composite mixing blade described in the present invention. The mixing tank is a double-layered tank structure with a cooling jacket. A cooling jacket water inlet pipe and a cooling jacket water outlet pipe are provided on the outer wall of the mixing tank, which are connected to the cooling jacket. The cooling ring is fixedly connected to the inner wall of the mixing tank through a support assembly, thereby suspending the cooling ring above the composite mixing paddle; a cooling ring inlet pipe and a cooling ring outlet pipe are provided on the outer wall of the cooling ring, which communicate with the annular cooling cavity of the cooling ring. Both the cooling ring inlet pipe and the cooling ring outlet pipe are sealed through the mixing tank and extend outside the outer wall of the mixing tank. Alternatively, the cooling ring inlet pipe is sealed to the cooling jacket inlet pipe and has an inlet that communicates with the cooling jacket. The cooling ring outlet pipe is sealed to the cooling jacket outlet pipe and has an outlet that communicates with the cooling jacket.

[0022] The mixing tank is made of high-strength stainless steel, such as 304 / 316L. The inner wall of the mixing tank and the outer surface of the cooling ring are precision polished to Ra≤0.4 to prevent material accumulation on the surface.

[0023] Furthermore, in the aforementioned dual cooling combination device, a more preferred embodiment is that the distance between the lowest position of the composite stirring paddle and the inner bottom surface of the stirring tank is 4-6 mm; and the distance between the outermost end of the composite stirring paddle and the inner wall of the stirring tank is 3-6 mm.

[0024] The processing technology of the dual cooling combination device described in this solution is characterized in that: the processing technology is based on the above-mentioned dual cooling combination device, and the processing technology of mixing materials using this device is as follows: The rotational speed of the drive shaft for the composite agitator is controlled by a frequency converter. The stirring time controlled by the driving agitator shaft is set by a time controller; A speed monitoring sensor for measuring the rotational speed of the driving stirring shaft is installed on the dual cooling combination device at the driving stirring shaft. The mixing tank is equipped with a temperature monitoring sensor that comes into contact with the material and is used to measure the temperature of the material. The temperature of the cooling medium introduced into the cooling jacket and cooling ring is controlled by the cooling medium controller. The manufacturing process of the dual cooling combination device is as follows: The manufacturing is controlled by a main controller. The main controller can control the frequency converter, time controller, and cooling medium controller based on signals from the speed monitoring sensor and temperature monitoring sensor, according to the formula: U=C×N. 4 / 5 ×T -1 / 5 ×t 3 / 5 Optimize stirring speed, stirring time, and cooling medium inlet temperature; In the formula: U: uniformity of mixing and cooling; C: material difference coefficient; N: rotational speed of the driving agitator shaft; T: temperature of the cooling medium; t: stirring time of the driving agitator shaft.

[0025] AI algorithms are used to optimize the above process parameters to achieve the energy consumption control values ​​for relevant industries (such as 1.8 to 3.0 kg of standard coal / kg for the plastic products industry).

[0026] The beneficial effects of this invention are: ① Through the overall structural design of the composite stirring paddle, the material can undergo shearing, tumbling, and parabolic compound motion during the stirring process, thereby rapidly dissipating heat from the material; ② The overall structural design of the composite stirring paddle, combined with the circulation of cooling media such as water and refrigerant in the internal cooling ring and external cooling jacket, realizes heat exchange between the material and cools it rapidly. The material has good cooling uniformity and fast cooling speed, which can greatly shorten the cooling time and greatly improve the cooling efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a composite stirring impeller according to the present invention.

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure in the AA section.

[0029] Figure 3 Yes Figure 2 A schematic diagram with various angles and dimensions marked.

[0030] Figure 4 yes Figure 1 A structural schematic diagram in the BB section.

[0031] Figure 5 Yes Figure 4 A schematic diagram with various angles and dimensions marked.

[0032] Figure 6 yes Figure 1 A schematic diagram of the structure from a top-down view.

[0033] Figure 7 yes Figure 6 A partial structural diagram of the second cooling and stirring impeller.

[0034] Figure 8 yes Figure 6 A partial structural diagram of the first cooling and stirring impeller.

[0035] Figure 9 This is a schematic diagram of the structure of a dual cooling combination device according to the present invention.

[0036] Figure 10 This is a schematic diagram of the connection structure between the cooling ring inlet pipe and the cooling jacket inlet pipe.

[0037] Figure 11 This is a schematic diagram of the connection structure between the cooling ring outlet pipe and the cooling jacket outlet pipe of the cooling ring.

[0038] Figure 12 yes Figure 9 A magnified schematic diagram of part C in the middle.

[0039] in: 1. First cooling and stirring impeller; 11. First top surface; 12. First bottom surface; 13. First shear surface; 14. First bottom plane; 15. First pushing end; 16. First non-pushing end; 101. First vertical center plane; 2. Second cooling and stirring main impeller; 21. Second top surface; 22. Second bottom surface; 23. Second shear surface; 24. Second bottom plane; 25. Second pushing end; 26. Second non-pushing end; 201. Second vertical center surface; 3. Bushing; 4. First cooling and stirring impeller; 5. First reinforcing rod; 6. Second reinforcing rod; 7. Second cooling and stirring impeller; 8. Mixing tank; 81. Inner tank; 82. Outer tank; 83. Cooling jacket; 84. Cooling jacket water inlet pipe; 841. Water inlet; 85. Cooling jacket water outlet pipe; 851. Water outlet; 9. Cooling ring; 91. Annular cooling cavity; 92. Cooling ring inlet pipe; 921. First shoulder; 93. Cooling ring outlet pipe; 931. Second shoulder; 94. First connecting ring; 95. Second connecting ring; 100. Composite mixing paddle. Detailed Implementation

[0040] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, the exemplary embodiments described may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0041] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other. Example 1

[0042] like Figure 1 and Figure 6 As shown, the composite stirring impeller 100 described in this embodiment includes: a bushing 3, a first cooling stirring main impeller 1 fixed on the bushing 3, and a second cooling stirring main impeller 2 fixed on the bushing 3, wherein the first cooling stirring main impeller 1 and the second cooling stirring main impeller 2 are both fixed to the bushing 3 by welding.

[0043] For ease of description, a vertical center plane is defined for both the first cooling stirring impeller 1 and the second cooling stirring impeller 2, denoted as the first vertical center plane 101 and the second vertical center plane 201, respectively. Figure 6As shown. The first vertical center surface 101 of the first cooling and stirring main impeller 1, the second vertical center surface 201 of the second cooling and stirring main impeller 2, and the axis of the bushing 3 are all in the same plane, and the first cooling and stirring main impeller 1 is located on the outer circumferential wall of the upper half of the bushing 3, and the second cooling and stirring main impeller 2 is located on the outer circumferential wall of the lower half of the bushing 3.

[0044] In this embodiment, a first reinforcing rod 5 is provided between the first cooling and stirring main impeller 1 and the bushing 3. One end of the first reinforcing rod 5 is fixedly connected to the bottom of the first cooling and stirring main impeller 1, and the other end of the first reinforcing rod 5 is fixedly connected to the outer circumferential wall of the lower half of the bushing 3 to improve strength.

[0045] In this embodiment, a plurality of first cooling and stirring auxiliary impellers 4 are evenly spaced from the outer end of the first cooling and stirring main impeller 1 at its bottom. Figure 1 The following example illustrates the setup of two first cooling and stirring paddles 4.

[0046] A more preferred embodiment is that the first cooling and stirring main impeller 1 is perpendicular to the bushing 3. The first reinforcing rod 5 is a round rod structure, and the axis of the first reinforcing rod 5 is in the same plane as the first vertical center plane 101 of the first cooling and stirring main impeller 1. The first reinforcing rod 5 is fixed to the first cooling and stirring main impeller 1 and the bushing 3 by welding. The surface of the first reinforcing rod 5 is finely polished to reduce surface material accumulation.

[0047] A more preferred embodiment is that the first cooling and stirring impeller 1 has a flat plate structure, such as... Figure 2 As shown, the end of the first reinforcing rod 5 and each of the first cooling and stirring auxiliary blades 4 are disposed on the bottom surface of the first cooling and stirring main blade 1. For ease of description, the bottom surface of the first cooling and stirring main blade 1 is referred to as the first bottom surface 12, and the top surface of the first cooling and stirring main blade 1 is referred to as the first top surface 11. One long side end face of the first cooling and stirring main blade 1 is the first non-pushing end 16, and the other long side end face opposite to the first non-pushing end 16 is the first pushing end 15.

[0048] The purpose of setting the first reinforcing rod 5 is to prevent the first cooling and stirring main blade 1 from deforming, so as to avoid the deformation causing the first cooling and stirring main blade 1 to scrape against the bottom of the stirring tank and affect the normal operation of the stirring.

[0049] like Figure 2 As shown, the first cooling and stirring paddle 1 is set in an inclined direction, and the inclined direction gradually slopes downward from the first non-push end 16 to the first push end 15.

[0050] like Figure 2As shown, a first shearing surface 13 is inclinedly provided on the first top surface 11 at the first push end 16, and the first shearing surface 13 intersects with the first push end 15; a first bottom plane 14 parallel to the horizontal plane is provided on the first bottom surface 12 at the first push end 15, and the first bottom plane 14 intersects with the first push end 15.

[0051] A better option is: such as Figure 3 As shown, the tilt angle α1 of the first cooling and stirring main impeller 1 is 30±5°; wherein, the optimal tilt angle α1 of the first cooling and stirring main impeller 1 is 30°.

[0052] The tilt angle β1 of the first shear surface 13 is 60±5°; wherein, the optimal tilt angle β1 of the first shear surface 13 is 60°.

[0053] A better option is: such as Figure 2 , Figure 3 and Figure 8 As shown, the thickness t1 of the first cooling and stirring main impeller 1 is 25±1mm; wherein, the thickness t1 of the first cooling and stirring main impeller 1 is preferably 25mm.

[0054] The end face height H1 of the first pusher end 15 is 2.5±0.5mm; wherein, the optimal end face height H1 of the first pusher end 15 is 2.5mm.

[0055] The length L1 of the first bottom plane 14 is 5 ± 0.5 mm; wherein, the optimal length L1 of the first bottom plane 14 is 5 mm.

[0056] The outer end of the first cooling stirring impeller has a first pushing angle, the first pushing angle θ1 being 5±1°; wherein, the first pushing angle θ1 is preferably 5°.

[0057] The end face of the first non-push end 16 is an arc-shaped outward protrusion that smoothly transitions with the first top surface 11 and the first bottom surface 12. When the thickness t1 of the first cooling stirring main impeller 1 is 25mm, the radius of the first non-push end 16 is 12.5mm.

[0058] A more preferred embodiment is that the first cooling and stirring sub-blade 4 is a parallelogram plate structure, and both sides of the first cooling and stirring sub-blade 4 are parallel to the axis of the bushing 3.

[0059] The first cooling and stirring auxiliary impeller 4 is vertically arranged relative to the horizontal plane, and is inclined relative to the vertical plane of the first cooling and stirring main impeller 1. The inclination direction gradually slopes outward from the first pushing end 15 of the first cooling and stirring main impeller 1 towards the non-pushing end 16. Figure 6 As shown.

[0060] A better option is: such as Figure 8 As shown, the tilt angle γ1 of the first cooling stirring sub-blade 4 is 30±5°; wherein, the optimal tilt angle γ1 of the first cooling stirring sub-blade 4 is 30°.

[0061] In this embodiment, a second reinforcing rod 6 is provided between the second cooling and stirring main impeller 2 and the bushing 3. One end of the second reinforcing rod 6 is fixedly connected to the top of the second cooling and stirring main impeller 2, and the other end of the second reinforcing rod 6 is fixedly connected to the outer circumferential wall of the upper half of the bushing 3.

[0062] In this embodiment, as Figure 1 and Figure 6 As shown, a plurality of second cooling and stirring auxiliary blades 7 are evenly spaced from the outer end of the second cooling and stirring main blade 2 on the top of the second cooling and stirring main blade 2. This embodiment Figure 1 The following example illustrates the setup of two second cooling and stirring paddles 7.

[0063] A more preferred embodiment is that the second cooling and stirring main impeller 2 is perpendicular to the bushing 3. All second reinforcing rods 6 are round rods, and the axis of the second reinforcing rod 6 is in the same plane as the first vertical center plane 201 of the second cooling and stirring main impeller 2. The second reinforcing rod 6 is fixed to the second cooling and stirring main impeller 2 and the bushing 3 by welding. The surface of the second reinforcing rod 6 is finely polished to reduce surface material accumulation.

[0064] A better option is: such as Figure 4 As shown, the second cooling and stirring main impeller 2 has a flat plate structure. The ends of the second reinforcing rod 6 and each of the second cooling and stirring auxiliary impellers 7 are located on the top surface of the second cooling and stirring main impeller 2. For ease of description, the bottom surface of the second cooling and stirring main impeller 2 is referred to as the second bottom surface 22, and the top surface of the second cooling and stirring main impeller 2 is referred to as the second top surface 21. One long side end face of the second cooling and stirring main impeller 2 is the second non-push end 26, and the other long side end face opposite to the second non-push end 26 is the second push end 25.

[0065] The purpose of setting the second reinforcing rod 6 is to prevent the second cooling and stirring main blade 2 from deforming, so as to avoid the deformation causing the second cooling and stirring main blade 2 to scrape against the bottom of the stirring tank and affect the normal operation of the stirring.

[0066] like Figure 4 As shown, the second cooling and stirring paddle 2 is set in an inclined direction, and the inclined direction gradually slopes downward from the second non-push end 26 to the second push end 25.

[0067] like Figure 4As shown, a second shearing surface 23 is inclinedly provided on the second top surface 21 at the second push end 25, and the second shearing surface 23 intersects with the second push end 25; a second bottom plane 24 parallel to the horizontal plane is provided on the second bottom surface 22 at the second push end 25, and the second bottom plane 24 intersects with the second push end 25.

[0068] A better option is: such as Figure 5 As shown, the tilt angle α2 of the second cooling and stirring main impeller 2 is 30±5°; wherein, the optimal tilt angle α2 of the second cooling and stirring main impeller 2 is 30°.

[0069] The tilt angle β2 of the second shear surface 23 is 60±5°; wherein, the optimal tilt angle β2 of the second shear surface 23 is 60°.

[0070] A better option is: such as Figure 4 , Figure 5 and Figure 7 As shown, the thickness t2 of the second cooling and stirring main impeller 2 is 25±1mm; wherein, the optimal thickness t2 of the second cooling and stirring main impeller 2 is 25mm.

[0071] The end face height H2 of the second pusher end 25 is 2.5±0.5mm, wherein the optimal end face height H2 of the second pusher end 25 is 2.5mm.

[0072] The length L2 of the second bottom plane 24 is 5 ± 0.5 mm; wherein, the optimal length L2 of the second bottom plane 24 is 5 mm.

[0073] The outer end of the second cooling and stirring main impeller 2 has a second pushing angle, the second pushing angle θ2 being 5±1°; wherein, the second pushing angle θ2 is optimally 5°.

[0074] The end face of the second non-push end 26 is an arc-shaped outward protrusion that smoothly transitions with the second top surface 21 and the second bottom surface 22. When the thickness t2 of the second cooling stirring main impeller 2 is 25mm, the radius of the second non-push end 26 is 12.5mm.

[0075] A more preferred embodiment is that the second cooling and stirring sub-blade 7 is a parallelogram plate structure; and both sides of the second cooling and stirring sub-blade 7 are parallel to the axis of the bushing 3.

[0076] The second cooling and stirring auxiliary impeller 7 is vertically arranged relative to the horizontal plane, and is inclined relative to the vertical plane of the second cooling and stirring main impeller 2. The inclination direction gradually slopes inward from the second pushing end 25 of the second cooling and stirring main impeller 2 towards the second non-pushing end 26. Figure 6 As shown.

[0077] A better option is: such as Figure 7 As shown, the tilt angle γ2 of the second cooling stirring sub-paddle 7 is 30±5°; wherein, the optimal tilt angle γ2 of the second cooling stirring sub-paddle 7 is 30°.

[0078] The composite agitator 100 is made of high-strength stainless steel, such as 304 / 316L.

[0079] After the composite stirring paddle 100 is processed and formed, it is first tested for balance using a balance test device. Balance test is a mature existing testing technology.

[0080] If the test results meet the condition that the balance accuracy level is ≤G40, then the composite agitator 100 is qualified. At this time, the mass distribution of each part of the composite agitator 100 is uniform when rotating, which can improve the stability of the rotation of the composite agitator 100 and reduce vibration. If the test results do not meet the condition that the balance accuracy level is ≤G40, the outer end of the heavier side of the composite stirring paddle 100 shall be adjusted by grinding or reducing the weight by drilling chips, and the balance test shall continue after adjustment.

[0081] Next, the first shear surface 13, the second shear surface 23, the first top surface 11 of the first cooling stirring main impeller 1, and the second top surface 22 of the second cooling stirring main impeller 2 of the composite stirring impeller 100 that have passed the balance test are sprayed to obtain a WC-10Co-4Cr tungsten carbide alloy reinforcement layer. The thickness of the WC-10Co-4Cr tungsten carbide alloy reinforcement layer is 0.1 to 0.3 mm.

[0082] In this embodiment, the coating is carried out using the American HVOF (High-Speed ​​Fire Coating) system. The spraying speed is 1000-2200 m / s, the flame temperature is 3000±10℃, the porosity is less than 10%, the density is 98%-99.8%, and the bonding strength between the coating and the substrate is 70-90 Wpa.

[0083] Finally, the alloy-reinforced composite stirring paddle 100 is subjected to rough grinding and polishing, fine grinding and polishing, and drying.

[0084] The steps for rough grinding and polishing, fine grinding and polishing, and drying of the alloy-reinforced composite stirring paddle 100 are as follows: (1) Coarse grinding and polishing: Select 3P grinding stone. 3P grinding stone is an irregularly shaped grinding stone. The volume ratio of 3P grinding stone to the composite stirring paddle 100 to be coarsely ground is 4:1. Add grinding liquid. The amount of grinding liquid used is adjusted according to the actual working conditions. Grind at high speed for 20 to 30 minutes to remove burrs and oxide scale from the surface of the composite stirring paddle 100. (2) Fine grinding and polishing: Take out the 3P grinding stone used for coarse grinding and polishing, put in a new 3P grinding stone, and the volume ratio of the 3P grinding stone to the composite stirring paddle 100 to be coarsely ground is 6:1; add a brightener, and adjust the amount of brightener according to the actual working conditions; grind at high speed for 20 to 30 minutes to make the surface roughness of the composite stirring paddle 100 ≤0.8; (3) Drying: Using vibration drying technology, the surface of the composite mixing paddle 100 is dried by high-speed processing for 10 to 15 minutes.

[0085] The alloyed composite agitator 100 exhibits high wear resistance and corrosion resistance, meeting the cooling and agitation requirements of various materials. Furthermore, its surface roughness after coarse and fine grinding and polishing is ≤0.8, effectively eliminating material accumulation on the surface.

[0086] The outer edges of the first cooling and stirring main impeller 1 and the second cooling and stirring main impeller 2 are usually rounded.

[0087] Through the overall structural design of the composite mixing paddle 100, the material can undergo shearing, tumbling, and parabolic compound motion during the mixing process, thereby enabling the material to disperse quickly and dissipate heat rapidly. Example 2

[0088] The dual cooling combination device described in this embodiment is an improvement on the structure of an existing vertical low-speed cooling mixer.

[0089] The improvement is to replace the agitator on the stirring device inside the mixing tank 8 with the composite agitator 100 described in Example 1, such as... Figure 9 As shown.

[0090] The second improvement involves configuring the mixing tank 8 as a double-layered tank structure with a cooling jacket 83. In this case, the mixing tank 8 includes an inner tank 81 and an outer tank 82, with the sealed space between the inner tank 81 and the outer tank 82 forming the cooling jacket 83. A cooling jacket inlet pipe 84 and a cooling jacket outlet pipe 85, communicating with the cooling jacket 83, are installed on the outer wall of the mixing tank 8. Specifically, the cooling jacket inlet pipe 84 is located at the lower section of the cooling jacket 83, and the cooling jacket outlet pipe 85 is located at the upper section of the cooling jacket 83, allowing the cooling medium to enter from the bottom and exit from the top. Figure 9 As shown.

[0091] The third improvement involves adding a cooling ring 9. The cooling ring 9 is fixedly connected to the inner wall of the mixing tank 8 via a support assembly, thus suspending the cooling ring 9 above the composite mixing paddle 100. A cooling ring inlet pipe 92 and a cooling ring outlet pipe 93, communicating with the annular cooling cavity 91 of the cooling ring 9, are provided on the outer wall of the cooling ring 9. The cooling ring inlet pipe 92 is located at the lower section of the annular cooling cavity 91, and the cooling ring outlet pipe 93 is located at the upper section of the annular cooling cavity 91, allowing the cooling medium to enter from the bottom and exit from the top. Figure 9 As shown.

[0092] There are two methods for supplying cooling medium to the cooling jacket 83 and the annular cooling cavity 91. The first method involves each cooling jacket 83 and the annular cooling cavity 91 being supplied with its own cooling medium, without sharing a common inlet and outlet pipe. In this case, there are two inlet pipes outside the outer wall of the mixing tank 8: a cooling jacket inlet pipe 84 and a cooling ring inlet pipe 92. There are also two outlet pipes outside the outer wall of the mixing tank 8: a cooling jacket outlet pipe 85 and a cooling ring outlet pipe 93. Specifically, both the cooling ring inlet pipe 92 and the cooling ring outlet pipe 93 are sealed and pass through the mixing tank 8 before extending outside the outer wall of the mixing tank. In this case, the cooling ring inlet pipe 92 is connected to the corresponding cooling medium supply source, and the cooling jacket inlet pipe 84 is also connected to the corresponding cooling medium supply source. The cooling medium supply source can be shared, and the cooling medium can be water or refrigerant.

[0093] The second method involves the cooling jacket 83 and the annular cooling cavity 91 sharing the same inlet and outlet water pipes. In this case, there is only one inlet water pipe outside the outer wall of the mixing tank 8, namely the cooling jacket inlet water pipe 84. There is only one outlet water pipe outside the outer wall of the mixing tank 8, namely the cooling jacket outlet water pipe 85. Specifically: like Figure 10 and Figure 11 As shown, the cooling ring water inlet pipe 92 is sealed to the cooling jacket water inlet pipe 84, and the cooling jacket water inlet pipe 84 has a water inlet 841 that communicates with the cooling jacket 83. The number of water inlets 841 can be one or more.

[0094] At this time, one end of the cooling jacket water inlet pipe 84 is located outside the outer wall of the mixing tank 8, and the other end of the cooling jacket water inlet pipe 84 extends into the mixing tank 8. The cooling jacket water inlet pipe 84 is sealed and inserted into the inner tank 81 and the outer tank 82. Each water inlet 841 is located on the cooling jacket water inlet pipe 84 between the inner tank 81 and the outer tank 82.

[0095] The cooling ring inlet pipe 92 and the cooling jacket inlet pipe 84 can be sealed by welding or by detachment. A first protruding shoulder 921 is provided at the end of the cooling ring inlet pipe 92, and a first external thread section is provided at the end of the cooling jacket inlet pipe 84 that extends into the mixing tank 8. A first sealing element, such as a sealing ring, is provided between the cooling ring inlet pipe 92 and the cooling jacket inlet pipe 84. The first connecting ring 94, which is fitted on the cooling ring inlet pipe 92, is tightened by the first internal thread section and the first external thread section.

[0096] The cooling ring outlet pipe 93 is sealed to the cooling jacket outlet pipe 85, and the cooling jacket outlet pipe 85 has an outlet 851 that communicates with the cooling jacket 83. The number of outlets 851 can be one or more.

[0097] At this time, one end of the cooling jacket water outlet pipe 85 is located outside the outer wall of the mixing tank 8, and the other end of the cooling jacket water outlet pipe 85 extends into the mixing tank 8. The cooling jacket water outlet pipe 85 is sealed and inserted into the inner tank 81 and the outer tank 82. Each water outlet 851 is located on the cooling jacket water outlet pipe 85 between the inner tank 81 and the outer tank 82.

[0098] The cooling ring outlet pipe 93 and the cooling jacket outlet pipe 85 can be sealed by welding or by detachment. A second protruding shoulder 931 is provided at the end of the cooling ring outlet pipe 93, and a second external thread section is provided at the end of the cooling jacket outlet pipe 85 that extends into the mixing tank 8. A second sealing element, such as a sealing ring, is provided between the cooling ring outlet pipe 93 and the cooling jacket outlet pipe 85. The second connecting ring 95, which is fitted on the cooling ring outlet pipe 93, is tightened by the second internal thread section and the second external thread section on it.

[0099] Temperature instruments and temperature sensors can be installed in the mixing tank 8 and the cooling jacket 83 to enable real-time monitoring of the material temperature.

[0100] In this embodiment, the mixing tank 8 and the composite mixing paddle 100 are made of high-strength stainless steel, such as 304 / 316L. The inner wall of the mixing tank 8 is also coated with a WC-10Co-4Cr tungsten carbide alloy reinforcing layer, which is treated by coarse grinding, fine grinding, and drying.

[0101] The alloyed composite stirring paddle 100 and the stirring tank 8 have high wear resistance and corrosion resistance, and can meet the cooling and stirring requirements of different materials. In addition, the surface roughness after coarse grinding and fine grinding is ≤0.8, which can eliminate the problem of material accumulation on the surface.

[0102] The distances between the composite agitator 100 and the inner bottom surface of the mixing tank 8, as well as the distances between the composite agitator 100 and the inner wall of the mixing tank 8, need to be strictly set. If the gaps are too small, the composite agitator 100 will not operate smoothly; if the gaps are too large, the composite agitator 100 will not be able to scrape the material cleanly during discharge, resulting in incomplete discharge and residual material remaining in the mixing tank 8. A more preferable solution is: Figure 9 and Figure 12 As shown, the distance H1 between the lowest point of the composite stirring paddle 100 and the inner bottom surface of the stirring tank 8 (which is also the inner bottom surface of the inner tank body 81) is 3-6 mm; the distance H2 between the outermost end of the composite stirring paddle 100 and the inner wall of the stirring tank 8 (which is also the inner wall of the inner tank body 81) is 4-6 mm. The specific values ​​of H1 and H2 are determined based on the size of the stirring tank 8. Generally, the larger the size of the stirring tank 8, the larger the values ​​of H1 and H2 should be, and vice versa.

[0103] By designing the overall structure of the composite stirring paddle 100, the material can undergo shearing, tumbling, and parabolic compound motion during the stirring process, thereby rapidly dissipating heat from the material. Combined with the circulation of cooling media such as water and refrigerant in the internal cooling ring 9 and the external cooling jacket 83, the material can exchange heat and cold, and cool down rapidly. The material has good cooling uniformity and fast cooling speed, which can greatly shorten the cooling time and greatly improve the cooling efficiency. Example 3

[0104] The drive shaft of the composite agitator 100 is typically driven by a combination of a drive motor and belt drive. This embodiment, based on Embodiment 2, controls the rotational speed of the drive shaft of the composite agitator 100 using a frequency converter. Specifically, the frequency converter controls the rotational speed of the output shaft of the drive motor, ultimately changing the rotational speed of the drive shaft.

[0105] The stirring time of the drive stirring shaft is set by a time controller, that is, the time of the drive motor operation is controlled by the time controller.

[0106] A speed monitoring sensor is installed on the dual cooling assembly at the drive stirring shaft to measure the rotational speed of the drive stirring shaft.

[0107] The mixing tank is equipped with a temperature monitoring sensor that comes into contact with the material and is used to measure the temperature of the material.

[0108] The temperature of the cooling medium introduced into the cooling jacket and cooling ring is controlled by the cooling medium controller.

[0109] The material mixing process of the dual cooling combination device is as follows: All other steps in the process are the same as in the traditional method. The difference lies in the addition of a central controller for processing control during the mixing process. The central controller can control the variable frequency drive, time controller, and cooling medium controller based on signals from the speed monitoring sensor and temperature monitoring sensor, according to the formula: U=C×N. 4 / 5 ×T -1 / 5 ×t 3 / 5 Optimize stirring speed, stirring time, and cooling medium inlet temperature; In the formula: U: uniformity of cooling of mixture (the calculation of uniformity of cooling of mixture is a mature algorithm in this field, so it will not be elaborated here); C: material difference coefficient (obtained through experiments, which is also a conventional method in this field, so it will not be elaborated here); N: rotational speed of the driving stirring shaft; T: temperature of the cooling medium; t: stirring time of the driving stirring shaft.

[0110] AI algorithms are used to optimize the above process parameters to achieve the energy consumption control values ​​for relevant industries (such as 1.8 to 3.0 kg of standard coal / kg for the plastic products industry).

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any modifications or equivalent changes made based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A composite stirring impeller, comprising: A bushing, a first cooling and stirring main impeller fixed on the bushing, and a second cooling and stirring main impeller fixed on the bushing, characterized in that: the vertical center plane of the first cooling and stirring main impeller, the vertical center plane of the second cooling and stirring main impeller, and the axis of the bushing are all in the same plane, and the first cooling and stirring main impeller is located on the outer circumferential wall of the upper half of the bushing, and the second cooling and stirring main impeller is located on the outer circumferential wall of the lower half of the bushing; A first reinforcing rod is provided between the first cooling and stirring main impeller and the bushing. One end of the first reinforcing rod is fixedly connected to the bottom of the first cooling and stirring main impeller, and the other end of the first reinforcing rod is fixedly connected to the outer circumferential wall of the lower half of the bushing. Several first cooling and stirring auxiliary blades are evenly spaced from the outer end of the first cooling and stirring main blade to the bottom of the first cooling and stirring main blade. A second reinforcing rod is provided between the second cooling and stirring main impeller and the bushing. One end of the second reinforcing rod is fixedly connected to the top of the second cooling and stirring main impeller, and the other end of the second reinforcing rod is fixedly connected to the outer circumferential wall of the upper half of the bushing. Several second cooling and stirring auxiliary blades are evenly spaced from the outer end of the second cooling and stirring main blade to the top of the second cooling and stirring main blade. After the composite stirring paddle is processed and shaped, its balance is tested using a balance testing device. If the test results meet the condition that the balance accuracy level is ≤G40, then the composite agitator is qualified. If the test results do not meet the condition of balance accuracy level ≤ G40, the outer end of the heavier side of the composite agitator should be adjusted by grinding or reducing weight by drilling chips, and the balance test should continue after adjustment.

2. The composite stirring impeller according to claim 1, characterized in that: The first cooling and stirring main impeller is perpendicular to the shaft sleeve, and the second cooling and stirring main impeller is perpendicular to the shaft sleeve; Both the first reinforcing rod and the second reinforcing rod are round rod structures, and the axis of the first reinforcing rod is in the same plane as the vertical center plane of the first cooling and stirring main impeller; the axis of the second reinforcing rod is in the same plane as the vertical center plane of the second cooling and stirring main impeller.

3. The composite stirring impeller according to claim 1, characterized in that: The first cooling and stirring main impeller has a flat plate structure, and the end of the first reinforcing rod and each of the first cooling and stirring auxiliary impellers are all located on the bottom surface of the first cooling and stirring main impeller. One long side end face of the first cooling stirring main impeller is the first non-pushing end, and the other long side end face opposite to the first non-pushing end is the first pushing end; The first cooling and stirring paddle is set in an inclined direction, and the inclined direction gradually slopes downward from the first non-push end to the first push end. A first shearing surface is inclinedly provided on the top surface of the first cooling and stirring main impeller at the first pushing end, and the first shearing surface intersects with the first pushing end; A first bottom plane parallel to the horizontal plane is provided on the bottom surface of the first cooling and stirring main impeller at the first pushing end, and the first bottom plane intersects with the first pushing end; The second cooling and stirring main impeller has a flat plate structure, and the end of the second reinforcing rod and each of the second cooling and stirring auxiliary impellers are located on the top surface of the second cooling and stirring main impeller. One long side end face of the second cooling and stirring main impeller is the second non-pushing end, and the other long side end face opposite to the second non-pushing end is the second pushing end; The second cooling and stirring paddle is set in an inclined direction, and the inclined direction gradually slopes downward from the second non-push end to the second push end; A second shearing surface is inclinedly provided on the top surface of the second cooling and stirring main paddle at the second pushing end, and the second shearing surface intersects with the second pushing end; a second bottom plane parallel to the horizontal plane is provided on the bottom surface of the second cooling and stirring main paddle at the second pushing end, and the second bottom plane intersects with the second pushing end. Spraying is performed on the first shear surface, the second shear surface, the top surface of the first cooling stirring main impeller, and the top surface of the second cooling stirring main impeller of the composite stirring impeller that have passed the balance test to obtain a WC-10Co-4Cr tungsten carbide alloy reinforcement layer. The thickness of the WC-10Co-4Cr tungsten carbide alloy reinforcement layer is 0.1 to 0.3 mm. The alloy-reinforced composite stirring paddle is subjected to rough grinding and polishing, fine grinding and polishing, and drying.

4. The composite stirring impeller according to claim 3, characterized in that: The spraying speed used in the spraying operation is 1000-2200m / s, the flame temperature is 3000±10℃, the porosity is less than 10%, the density is 98%-99.8%, and the bonding strength between the coating and the substrate is 70-90Wpa. The steps for rough grinding and polishing, fine grinding and polishing, and drying of the alloy-reinforced composite stirring paddle are as follows: (1) Coarse grinding and polishing: Select 3P grinding stone, and the volume ratio of 3P grinding stone to the composite stirring paddle to be coarsely ground is 4:1; add grinding liquid and grind at high speed for 20 to 30 minutes to remove burrs and oxide scale from the surface of the composite stirring paddle. (2) Fine grinding and polishing: Take out the 3P grinding stone used for coarse grinding and polishing, put in a new 3P grinding stone, and the volume ratio of the 3P grinding stone to the composite stirring paddle to be coarsely ground is 6:1; add a brightener, grind at high speed for 20 to 30 minutes, so that the surface roughness of the composite stirring paddle is ≤0.

8. (3) Drying: Use vibration drying technology to dry the surface of the composite mixing paddle at high speed for 10-15 minutes.

5. A composite stirring impeller according to claim 3, characterized in that: The tilt angle α1 of the first cooling stirring impeller is 30±5°; the tilt angle β1 of the first shear surface is 60±5°. The tilt angle α2 of the second cooling stirring impeller is 30±5°; the tilt angle β2 of the second shear surface is 60±5°.

6. A composite stirring impeller according to claim 5, characterized in that: The thickness t1 of the first cooling and stirring main impeller is 25±1mm; the end face height H1 of the first pushing end is 2.5±0.5mm; the length L1 of the first bottom plane is 5±0.5mm; the outer end of the first cooling and stirring main impeller has a first pushing angle θ1 of 5±1°. The thickness t2 of the second cooling and stirring main impeller is 25±1mm; the end face height H2 of the second pushing end is 2.5±0.5mm; the length L2 of the second bottom plane is 5±0.5mm; the outer end of the second cooling and stirring main impeller has a second pushing angle, and the second pushing angle θ2 is 5±1°. The end face of the first non-push end is an arc-shaped outward convex surface that smoothly transitions to the top and bottom surfaces of the first cooling and stirring main impeller. The end face of the second non-push end is an arc-shaped outward protrusion that smoothly transitions to the top and bottom surfaces of the second cooling and stirring main impeller.

7. A composite stirring impeller according to claim 1, 3, 4, 5, or 6, characterized in that: The first cooling and stirring sub-blade is a parallelogram plate structure, and both sides of the first cooling and stirring sub-blade are parallel to the axis of the bushing. The first cooling and stirring auxiliary paddle is set vertically relative to the horizontal plane, and the first cooling and stirring auxiliary paddle is set at an inclination relative to the vertical plane of the first cooling and stirring main paddle, and the inclination direction is gradually inclined outward and inward from the pushing end of the first cooling and stirring main paddle towards the non-pushing end. The second cooling and stirring sub-blade has a parallelogram plate structure; and both sides of the second cooling and stirring sub-blade are parallel to the axis of the bushing. The second cooling and stirring auxiliary paddle is set vertically relative to the horizontal plane, and the second cooling and stirring auxiliary paddle is set in an inclined direction relative to the vertical plane of the second cooling and stirring main paddle, and the inclined direction is gradually inclined inward from the pushing end of the second cooling and stirring main paddle to the non-pushing end. The tilt angle γ1 of the first cooling stirring sub-paddle is 30±5°; the tilt angle γ2 of the second cooling stirring sub-paddle is 30±5°.

8. A composite stirring impeller according to claim 1, characterized in that: The first shear surface, the second shear surface, the top surface of the first cooling stirring main blade, and the top surface of the second cooling stirring main blade of the composite stirring blade are the working surfaces of the first cooling stirring main blade and the second cooling stirring main blade. The working surfaces of the first cooling and stirring main impeller, the second cooling and stirring main impeller, and the bushing, all made of high-strength stainless steel, have a tungsten carbide alloy reinforcement layer.

9. A dual cooling combination device, comprising: A mixing tank and a mixing device disposed in the mixing tank; characterized in that: the composite mixing blade on the mixing device is a composite mixing blade as described in any one of claims 1 to 9; The mixing tank is a double-layered tank structure with a cooling jacket. A cooling jacket water inlet pipe and a cooling jacket water outlet pipe are provided on the outer wall of the mixing tank, which are connected to the cooling jacket. The cooling ring is fixedly connected to the inner wall of the mixing tank through a support assembly, thereby suspending the cooling ring above the composite mixing paddle; a cooling ring inlet pipe and a cooling ring outlet pipe are provided on the outer wall of the cooling ring, which communicate with the annular cooling cavity of the cooling ring. Both the cooling ring inlet pipe and the cooling ring outlet pipe are sealed through the mixing tank and extend out of the outer wall of the mixing tank. Alternatively, the cooling ring inlet pipe is sealed to the cooling jacket inlet pipe and the cooling jacket inlet pipe has an inlet that communicates with the cooling jacket. The cooling ring outlet pipe is sealed to the cooling jacket outlet pipe and the cooling jacket outlet pipe has an outlet that communicates with the cooling jacket. The distance from the lowest point of the composite stirring paddle to the inner bottom surface of the mixing tank is 4-6 mm; the distance from the outermost end of the composite stirring paddle to the inner wall of the mixing tank is 3-6 mm.

10. A processing technology for a dual cooling combination device, characterized in that: Based on the dual cooling combination device according to claim 9; The rotational speed of the drive shaft for the composite agitator is controlled by a frequency converter. The stirring time controlled by the driving agitator shaft is set by a time controller; A speed monitoring sensor for measuring the rotational speed of the driving stirring shaft is installed on the dual cooling combination device at the driving stirring shaft. The mixing tank is equipped with a temperature monitoring sensor that comes into contact with the material and is used to measure the temperature of the material. The temperature of the cooling medium introduced into the cooling jacket and cooling ring is controlled by the cooling medium controller. The manufacturing process of the dual cooling combination device is as follows: The manufacturing is controlled by a main controller. The main controller can control the frequency converter, time controller, and cooling medium controller based on signals from the speed monitoring sensor and temperature monitoring sensor, according to the formula: U=C×N. 4 / 5 ×T -1 / 5 ×t 3 / 5 Optimize stirring speed, stirring time, and cooling medium inlet temperature; In the formula: U: uniformity of mixing and cooling; C: Material difference coefficient; N: Rotational speed of the driving agitator shaft; T: Temperature of the cooling medium entering the shaft; t: The time for the stirring shaft to be driven.

Images