Material circulation lifting device

Abstract

The invention discloses a material circulation lifting device. One or two feeding port sets are formed in the outer side wall of the bottom of a lifting barrel. A circulating discharge hole group is formed in the outer side wall of the top of the lifting barrel; an opening in the top of the lifting barrel is sealed and covered by an upper connecting plate, and an opening in the bottom of the lifting barrel is sealed and covered by a lower connecting plate; a lifting screw is arranged in an inner cavity of the lifting barrel, the upper portion of the lifting screw is supported on the upper connecting plate through an upper bearing set, and the lower portion of the lifting screw is supported on the lower connecting plate through a lower bearing set. And the lifting screw is driven by a driving device to rotate. According to the device, materials are scattered after being lifted upwards from the bottom, the device is applied to mixing in the mixing barrel body of the mixer, and the device has the advantages of being uniform in mixing, free of damage to the materials and the like.

Description

Technical Field

[0001] This invention relates to the field of material mixing technology, and more particularly to a material circulation and lifting device. Background Technology

[0002] A mixing machine is a type of equipment used to mix multiple materials evenly. It is widely used in industries such as plastics, chemicals, pharmaceuticals, and food. Currently, the most common type of mixing machine on the market is the vertical mixing machine. Its main structure includes a mixing tank and a stirring paddle. Its working principle is to use a high-speed rotating stirring paddle to stir and mix the materials in the mixing tank. During the mixing process, the high-speed rotating stirring paddle causes the materials to undergo high and low speed parabolic and shearing motions.

[0003] The vertical mixer with the above structure has the following defects: ① The three-dimensional movement of the material is insufficient, so it cannot be adapted to the mixing of materials with stratification or extremely high uniformity requirements; ② The high-speed rotating agitator has high-speed shearing and mixing, which can easily damage fragile particles or crystals, fragile finished materials, etc.; ③ The bottom of the mixing tank is a flat bottom structure, so there are dead corners for mixing materials at the bottom of the mixing tank. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a material circulation lifting device that lifts materials from the bottom up and then scatters them. This material circulation lifting device is used in the mixing tank of a mixer for mixing, and has the advantages of uniform mixing and no damage to the materials. It is suitable for mixing powder, granules or small flake materials, and is especially suitable for mixing materials that are layered or have extremely high uniformity requirements.

[0005] To achieve the above objectives, the present invention utilizes a lifting screw to lift the material from the bottom upwards, and then the material lifted to the higher position falls under the action of gravity. The process of lifting and falling is repeated to achieve uniform mixing of the material.

[0006] This invention provides two technical solutions.

[0007] The first technical solution is: the material circulation lifting device includes: a lifting cylinder, a set of feed inlets is provided on the outer side wall at the bottom of the lifting cylinder, the feed inlet set consists of at least one feed inlet; a set of circulation discharge outlets is provided on the outer side wall at the top of the lifting cylinder, the circulation discharge outlet set consists of at least four circulation discharge outlets, and each circulation discharge outlet is evenly spaced around the lifting cylinder. The top opening of the lifting cylinder is covered by an upper connecting plate, and the bottom opening of the lifting cylinder is covered by a lower connecting plate; A lifting screw is provided in the inner cavity of the lifting cylinder. The upper part of the lifting screw is supported on the upper connecting plate by an upper bearing assembly, and the lower part of the lifting screw is supported on the lower connecting plate by a lower bearing assembly. The lifting screw is driven to rotate by a drive device, thereby lifting the material entering from each feed port to each circulating discharge port, and dropping it outward from each circulating discharge port. A material throwing disc is fixedly installed on the lifting cylinder, and the material throwing disc is located below the circulating discharge port group.

[0008] When the aforementioned material circulation and lifting device is applied to a mixer, a circulation hopper is installed on the lifting cylinder located at the feed inlet group. Material falling out from each circulation outlet returns to the circulation hopper. The circulation hopper has a conical structure, preferably a cylindrical one. A finished product discharge pipe is installed on the circulation hopper, and a discharge valve is installed on the finished product discharge pipe. Guided by the conical surface of the circulation hopper, the material flows and converges towards each feed inlet and the finished product discharge pipe. When the discharge valve is closed, the material is circulated, lifted, and scattered by the material circulation and lifting device. When the discharge valve is opened, the material is discharged through the discharge valve.

[0009] A better solution is to make each of the feed inlets and each of the circulating discharge outlets rectangular open shapes.

[0010] Furthermore, in the aforementioned material circulation and lifting device, the throwing disc includes: a flat throwing disc fixed to the lifting cylinder, with a smooth, curved extension along its circumferential edge forming a downward-curving arc surface with a circular cross-section; and a plurality of vertically penetrating throwing disc discharge holes are spaced apart on the flat throwing disc. Of the material falling outward from each circulation outlet, some material falls downward through the discharge holes on the throwing disc, while other material slides and moves along the top surface of the throwing disc, scattering in an umbrella-like manner.

[0011] Furthermore, in the aforementioned material circulation lifting device, each circulation outlet is at the same height, and the throwing disc is located at the lower edge of the circulation outlet group; the unloading holes of each throwing disc are evenly spaced on the flat throwing disc, and the evenly arranged throwing disc unloading holes can increase the uniformity of the material distribution space scattered through each throwing disc unloading hole; the cross-section of the downward-curved arc surface is a 1 / 4 circular shape.

[0012] Furthermore, in the aforementioned material circulation lifting device, a plurality of baffle rods are fixedly installed on the lifting screw located at the circulation outlet group. The baffle rods are at the same height and are evenly spaced around the lifting cylinder. The distance between the outer end of each baffle rod and the axis of the lifting screw is less than the inner radius of the lifting cylinder.

[0013] In addition to the above-mentioned configuration, the baffle rods can also be grouped, specifically as follows: Two sets of baffle rods are arranged from top to bottom on the lifting screw located at the circulating discharge port group: an upper baffle rod group and a lower baffle rod group; each baffle rod group consists of several baffle rods, and the number of baffle rods in each group is the same; the height of each baffle rod in each group is the same, and the baffle rods in each group are evenly spaced around the lifting screw; the baffle rods in the upper baffle rod group and the baffle rods in the lower baffle rod group are staggered vertically; the distance between the outer end of each baffle rod in each baffle rod group and the axis of the lifting screw is less than the inner radius of the lifting cylinder.

[0014] The second technical solution is as follows: The material circulation lifting device includes a lifting cylinder, on the outer wall at the bottom of the lifting cylinder, two sets of inlet groups are spaced apart from bottom to top: a feeding inlet group and a circulating inlet group; the feeding inlet group consists of at least one feeding inlet, and all feeding inlets are at the same height; the circulating inlet group consists of at least four circulating inlets, all circulating inlets are at the same height, and the circulating inlets are evenly spaced around the lifting cylinder; A set of circulating discharge ports is provided on the outer wall at the top of the lifting cylinder. The set of circulating discharge ports consists of at least four circulating discharge ports, and each circulating discharge port is evenly spaced around the lifting cylinder. The top opening of the lifting cylinder is covered by an upper connecting plate, and the bottom opening of the lifting cylinder is covered by a lower connecting plate; A lifting screw is provided in the inner cavity of the lifting cylinder. The upper part of the lifting screw is supported on the upper connecting plate by an upper bearing assembly, and the lower part of the lifting screw is supported on the lower connecting plate by a lower bearing assembly. The lifting screw is driven to rotate by a drive device, thereby lifting the material entering from each feeding inlet or each circulating inlet to each circulating outlet, and dropping it outward from each circulating outlet. A material throwing disc is fixedly installed on the lifting cylinder, and the material throwing disc is located below the circulating discharge port group.

[0015] When the aforementioned material circulation lifting device is applied to a mixer, a circulation hopper is installed on the lifting cylinder located at the circulation inlet group. Material falling out from each circulation outlet returns to the circulation hopper. The circulation hopper has a conical structure, preferably a cylindrical conical structure. A finished product discharge pipe and a circulation discharge pipe are installed on the circulation hopper. A discharge valve is installed on the finished product discharge pipe, and a circulation discharge valve is installed on the circulation discharge pipe. Guided by the conical surface of the circulation hopper, the material in the circulation hopper flows and converges towards each circulation inlet, the finished product discharge pipe, and the circulation discharge pipe.

[0016] A bottom feeding hopper is also installed on the lifting cylinder at the feeding inlet assembly. The outlet of the circulating discharge pipe passes through the top inlet of the bottom feeding hopper and extends into the inner cavity of the bottom feeding hopper. The bottom feeding hopper has a conical structure, and the material in the bottom feeding hopper flows and converges towards each feeding inlet under the guidance of the conical surface of the bottom feeding hopper. When the discharge valve is closed and the circulating discharge valve is open, the material in the bottom feeding hopper enters the lifting cylinder through each feeding inlet, is lifted upward by the lifting screw, and falls from each circulating discharge outlet. The falling material falls into the circulating hopper, and then falls back into the bottom feeding hopper through the circulating discharge pipe. The material is circulated, lifted, and scattered under the action of the material circulation lifting device.

[0017] A better solution is to make each feeding inlet, each circulating feeding inlet, and each circulating discharge outlet a rectangular open shape.

[0018] A more preferred embodiment is that an inspection port is provided on the outer side wall at the bottom of the lifting cylinder, the inspection port is located outside the bottom feeding hopper, and an inspection door is provided at the inspection port.

[0019] Furthermore, in the aforementioned material circulation lifting device, the material discharge plate includes: a flat material discharge plate fixed on the lifting cylinder, which is smoothly curved and extended along the circumferential edge of the flat material discharge plate to form a downward-curved arc surface with a circular arc cross-section; and a plurality of material discharge holes that pass through the plate at intervals are provided on the flat material discharge plate.

[0020] Furthermore, in the aforementioned material circulation lifting device, each circulation outlet is at the same height, and the throwing disc is located at the lower edge of the circulation outlet group; the discharge holes of each throwing disc are evenly distributed on the flat throwing disc; the cross-section of the downward-folding arc-shaped surface is a 1 / 4 circular shape.

[0021] Furthermore, in the aforementioned material circulation lifting device, a plurality of baffle rods are fixedly installed on the lifting screw located at the circulation outlet group. The baffle rods are at the same height and are evenly spaced around the lifting cylinder. The distance between the outer end of each baffle rod and the axis of the lifting screw is less than the inner radius of the lifting cylinder.

[0022] In addition to the above-mentioned configuration, the baffle rods can also be grouped, specifically as follows: Two sets of baffle rods are arranged from top to bottom on the lifting screw located at the circulating discharge port group: an upper baffle rod group and a lower baffle rod group; each baffle rod group consists of several baffle rods, and the number of baffle rods in each group is the same; the height of each baffle rod in each group is the same, and the baffle rods in each group are evenly spaced around the lifting screw; the baffle rods in the upper baffle rod group and the baffle rods in the lower baffle rod group are staggered vertically; the distance between the outer end of each baffle rod in each baffle rod group and the axis of the lifting screw is less than the inner radius of the lifting cylinder.

[0023] The beneficial effects of this invention are: ① The device of this invention uses a lifting screw to lift the material from the bottom upwards, and then the material lifted to the high position falls under the action of gravity. The material is circulated between lifting and falling, so as to achieve uniform mixing; ② The material is circulated between lifting and falling, and the material is thrown back in an umbrella-shaped manner by the throwing disc and also falls back through the discharge holes of each throwing disc, so that the material falls evenly in the mixing barrel, thereby further improving the uniformity of material mixing; ③ The setting of each baffle rod plays the role of blocking the material, preventing the material from splashing onto the barrel lid and the top of the mixing barrel to form clumps, and solving the dead corner position; ④ The device of this invention is applied to the mixing barrel of a mixer for mixing, and has the advantages of uniform mixing and no damage to the material. It is suitable for mixing powder, granules or small flakes, especially for mixing materials with layering or extremely high uniformity requirements. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a material circulation and lifting device according to the present invention.

[0025] Figure 2 yes Figure 1 The diagram shows a material circulation lifting device installed in the mixing tank of a mixer, in use.

[0026] Figure 3 yes Figure 1 A magnified schematic diagram of part A in the middle.

[0027] Figure 4 yes Figure 3 A schematic diagram of another configuration for each material stop bar.

[0028] Figure 5 yes Figure 1 A magnified schematic diagram of part B in the middle section.

[0029] Figure 6 yes Figure 1 A schematic diagram of the structure of the lifting cylinder.

[0030] Figure 7 yes Figure 6 A schematic diagram of the structure in the CC section.

[0031] Figure 8 This is another structural schematic diagram of a material circulation lifting device according to the present invention.

[0032] Figure 9 yes Figure 8 A magnified schematic diagram of part D in the middle section.

[0033] Figure 10 yes Figure 8 The diagram shows a material circulation lifting device installed in the mixing tank of a mixer, in use.

[0034] Figure 11 yes Figure 8 A schematic diagram of the structure of the lifting cylinder.

[0035] in: 1. Lifting cylinder; 2. Feed inlet; 3. Circulating discharge outlet; 4. Upper connecting plate; 5. Lower connecting plate; 6. Lifting screw; 7. Upper bearing assembly; 8. Lower bearing assembly; 9. Mixing tank; 10. Tank lid; 11. Drive motor; 12. First pulley; 13. Second pulley; 14. Discharge disc; 15. Flat discharge disc; 16. Discharge disc with downward-folding arc-shaped panel; 17. Discharge disc discharge hole; 18. Baffle rod; 19. Upper baffle rod assembly; 20. Lower baffle rod assembly; 21. Upper cylinder; 22. Circulating hopper; 23. Feed inlet; 24. Circulating feed inlet; 25. Inspection port; 26. Inspection door; 27. Finished product discharge pipe; 28. Support rod; 29. ​​Transmission belt; 30. Circulating discharge pipe; 31. Bottom feeding hopper. Detailed Implementation

[0036] 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.

[0037] 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

[0038] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown in the figure, the material circulation lifting device described in this embodiment includes: a lifting cylinder 1, a set of feed inlets is provided on the outer side wall at the bottom of the lifting cylinder 1, the feed inlet set consisting of at least one feed inlet 2; and a set of circulation outlets is provided on the outer side wall at the top of the lifting cylinder 1, the circulation outlet set consisting of at least four circulation outlets 3.

[0039] A more preferred embodiment is that the feed inlet group consists of at least four feed inlets 2, all at the same height and evenly spaced around the lifting cylinder 1. Similarly, all circulating discharge outlets 3 are at the same height and evenly spaced around the lifting cylinder 1.

[0040] A more preferred embodiment is that each inlet 2 and each circulating outlet 3 is a rectangular open shape.

[0041] The top opening of the lifting cylinder 1 is covered by an upper connecting plate 4, and the bottom opening of the lifting cylinder 1 is covered by a lower connecting plate 5. A lifting screw 6 is installed inside the lifting cylinder 1. The upper part of the lifting screw 6 is supported on the upper connecting plate 4 by an upper bearing assembly 7, and the lower part of the lifting screw 6 is supported on the lower connecting plate 5 by a lower bearing assembly 8. The lifting screw 6 is driven to rotate by a drive device, thereby lifting the material entering from each feed port 2 to each circulating discharge port 3. The material reaching each circulating discharge port 3 then falls away under its own gravity.

[0042] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in this embodiment, a material throwing disc 14 is fixedly installed on the lifting cylinder 1. The material throwing disc 14 is located below each circulating discharge port 3. The material throwing disc 14 includes: a flat material throwing disc 15 fixed on the lifting cylinder 1, and a downward-curved curved surface with a circular arc cross-section formed by smoothly bending and extending along the circumferential edge of the flat material throwing disc 15, which is called the downward-curved curved surface 16 of the material throwing disc; a plurality of vertically penetrating material throwing disc discharge holes 17 are provided at intervals on the flat material throwing disc 15.

[0043] A more preferred embodiment is that the material throwing disc 14 is located at the lower edge of each circulating discharge port 3; the material throwing disc discharge holes 17 are evenly distributed on the flat material throwing disc 15; and the cross-section of the material throwing disc folding arc-shaped curved panel 16 is a 1 / 4 circular shape.

[0044] like Figure 4As shown, several baffle rods 18 are fixedly installed on the lifting screw 1 located at each circulating discharge port 3. The baffle rods 18 are at the same height and are evenly spaced around the lifting screw 1. The distance between the outer end of each baffle rod 18 and the axis of the lifting screw 6 is less than the inner radius of the lifting cylinder 1.

[0045] In addition to the above-described configuration, each material stop 8 can also be divided into two groups, such as... Figure 3 As shown, specifically, two sets of baffle rods are arranged from top to bottom on the lifting screw 6 located at the circulating discharge port 3: the upper baffle rod group 19 and the lower baffle rod group 20.

[0046] Each set of baffle rods consists of several baffle rods 18, and the number of baffle rods 18 in each set is the same; the height of each baffle rod 18 in each set is the same, and the baffle rods 18 in each set are evenly spaced around the lifting screw 6; the baffle rods 18 in the upper baffle rod set 19 and the baffle rods 18 in the lower baffle rod set 20 are staggered in vertical position; the distance between the outer end of each baffle rod 18 in each set and the axis of the lifting screw 6 is less than the inner radius of the lifting cylinder 1.

[0047] The drive unit adopts a combination of drive motor and belt drive. After the top of the lifting screw 6 passes through the through hole on the upper connecting plate 4, it is supported by the upper bearing assembly 7 fixed to the top of the upper connecting plate 4. A sealing element, such as a sealing ring, is provided between the lifting screw 6 and the through hole on the upper connecting plate 4. The sealing ring can be installed by creating a sealing ring mounting groove on the wall of the through hole on the upper connecting plate 4 or on the outer wall of the lifting screw 6. In addition, for sealing purposes, a sealing element, such as a sealing ring, is also provided between the bearing seat of the lower bearing assembly 8 and the inner wall of the lifting cylinder.

[0048] like Figure 2 As shown, when the material circulation lifting device is installed in the mixing tank 9 of the mixer, the lower part of the lifting cylinder 1 is installed at the bottom of the mixing tank 9, the lifting cylinder 1 extends into the middle through hole of the tank cover 10 of the mixing tank 9, and the upper connecting plate 4 is fixed to the top of the tank cover 10 of the mixing tank 9. The drive motor 11 is fixed to the tank cover 10 of the mixing tank 9 through the motor base. The output shaft of the drive motor 11 is provided with a first pulley 12, and the top of the lifting screw 6 extending above the upper bearing assembly 7 is fixed with a second pulley 13. The conveyor belt 14 is wound around the first pulley 12 and the second pulley 13 to form a belt drive. The belt drive is preferably a synchronous belt drive.

[0049] The mixing tank 9 includes an upper cylindrical tank 21 and a circulating hopper 22. The bottom of the circulating hopper 22 is located on the lifting cylinder 1 at the feed inlet assembly. Materials falling out from each circulating discharge port 3 return to the circulating hopper 22. The circulating hopper 22 has a conical structure, preferably a cylindrical structure. A finished product discharge pipe 27 is provided on the circulating hopper 22, and a discharge valve is installed on the finished product discharge pipe 27.

[0050] Guided by the conical surface of the circulating hopper 22, the material flows and converges towards each feed inlet 2 and the finished product discharge pipe 27. When the discharge valve is closed, the material is circulated, lifted, and scattered by the material circulation lifting device. When the discharge valve is opened, the material is discharged through the discharge valve.

[0051] A more preferred embodiment is that the relationship between the outer diameter D of the material throwing disc 14 and the inner diameter d of the upper cylindrical barrel 21 of the mixing barrel 9 is: D = 1 / 3d ~ 2 / 3d.

[0052] In addition, to improve the support strength of the lifting cylinder 1, several support rods 28 are installed between the lifting cylinder 1 and the circulating hopper 22, such as... Figure 2 As shown, each support rod 28 is preferably distributed at a uniform interval around the lifting cylinder 1.

[0053] In this scheme, a material feeding port can be set on the mixing tank 9. When the material is fed into the mixing tank 9 through the material feeding port, the material flows and converges in the direction of each feeding port 2. During the material lifting and circulation process, the material enters the lifting cylinder 1 through each feeding port 2, and is then lifted to each circulation discharge port 3 by the lifting screw 6. The material falls outward from each circulation discharge port 3. Part of the material that falls outward passes through the discharge holes 17 of each throwing plate and falls downward. The remaining material that falls outward falls back in the umbrella-shaped dispersion form through the throwing plate 14. The fallen material enters the lifting cylinder 1 again through each feeding port 2, is lifted again, and is circulated and dispersed, thereby achieving the purpose of uniform mixing.

[0054] The material circulation lifting device described in this embodiment is used in the mixing tank 9 of the mixer for mixing. It has the advantages of uniform mixing and no damage to the material. It is suitable for mixing powder, granules or small flakes, and is especially suitable for mixing materials with stratification or extremely high uniformity requirements. Example 2

[0055] like Figure 8 , Figure 9 and Figure 11As shown in this embodiment, a material circulation lifting device includes: a lifting cylinder 1, and two sets of inlet groups are provided on the outer side wall at the bottom of the lifting cylinder 1, which are: a feeding inlet group and a circulation inlet group from bottom to top; the feeding inlet group consists of at least one feeding inlet 23; the circulation inlet group consists of at least four circulation inlets 24, each circulation inlet 24 is at the same height, and each circulation inlet 24 is evenly spaced around the lifting cylinder.

[0056] like Figure 3 and Figure 4 As shown, a set of circulating discharge ports is provided on the outer wall at the top of the lifting cylinder 1. The circulating discharge port set consists of at least four circulating discharge ports 3. Each circulating discharge port 3 is at the same height and is evenly distributed around the lifting cylinder 1.

[0057] A more preferred embodiment is that each feeding inlet 23, each circulating feeding inlet 24, and each circulating discharge outlet 3 is a rectangular open shape.

[0058] In this embodiment, as Figure 9 and Figure 10 As shown, an inspection port 25 is provided on the outer wall at the bottom of the lifting cylinder 1, and an inspection door 26 is provided at the inspection port 25.

[0059] like Figure 8 , Figure 9 and Figure 11 As shown, the top opening of the lifting cylinder 1 is covered by an upper connecting plate 4, and the bottom opening of the lifting cylinder 1 is covered by a lower connecting plate 5. A lifting screw 6 is installed inside the lifting cylinder 1. The upper part of the lifting screw 6 is supported on the upper connecting plate 4 by an upper bearing assembly 7, and the lower part of the lifting screw 6 is supported on the lower connecting plate 5 by a lower bearing assembly 8. The lifting screw 6 is driven to rotate by a drive device, thereby lifting the material entering from each feeding inlet 23 or each circulating feeding inlet 24 to each circulating discharge outlet 3. The material reaching each circulating discharge outlet 3 then falls away under its own gravity.

[0060] A material throwing disc 14 is fixedly installed on the lifting cylinder 1, and the material throwing disc 14 is located below each circulating discharge port 3; the material throwing disc 14 includes: a flat material throwing disc 15 fixed on the lifting cylinder 1, and a downward-curved curved surface with a circular arc cross-section formed by smoothly bending and extending along the circumferential edge of the flat material throwing disc 15, which is called the downward-curved curved surface 16 of the material throwing disc; a plurality of material throwing disc discharge holes 17 are provided at intervals on the flat material throwing disc 15.

[0061] A more preferred embodiment is that the material throwing disc 14 is located at the lower edge of each circulating discharge port 3; the material throwing disc discharge holes 17 are evenly distributed on the flat material throwing disc 15; and the cross-section of the material throwing disc flip-down arc-shaped curved panel 16 is a 1 / 4 circular shape.

[0062] like Figure 4 As shown, several baffle rods 18 are fixedly installed on the lifting screw 1 located at each circulating discharge port 3. The baffle rods 18 are at the same height and are evenly spaced around the lifting screw 1. The distance between the outer end of each baffle rod 18 and the axis of the lifting screw 6 is less than the inner radius of the lifting cylinder 1.

[0063] In addition to the above-described configuration, each material stop 8 can also be divided into two groups, such as... Figure 3 As shown, specifically, two sets of baffle rods are arranged from top to bottom on the lifting screw 6 located at the circulating discharge port 3: the upper baffle rod group 19 and the lower baffle rod group 20.

[0064] Each set of baffle rods consists of several baffle rods 18, and the number of baffle rods 18 in each set is the same; the height of each baffle rod 18 in each set is the same, and the baffle rods 18 in each set are evenly spaced around the lifting screw 6; the baffle rods 18 in the upper baffle rod set 19 and the baffle rods 18 in the lower baffle rod set 20 are staggered in vertical position; the distance between the outer end of each baffle rod 18 in each set and the axis of the lifting screw 6 is less than the inner radius of the lifting cylinder 1.

[0065] The drive unit adopts a combination of drive motor and belt drive. After the top of the lifting screw 6 passes through the through hole on the upper connecting plate 4, it is supported by the upper bearing assembly 7 fixed to the top of the upper connecting plate 4. A sealing element, such as a sealing ring, is provided between the lifting screw 6 and the through hole on the upper connecting plate 4. The sealing ring can be installed by creating a sealing ring mounting groove on the wall of the through hole on the upper connecting plate 4 or on the outer wall of the lifting screw 6. In addition, for sealing purposes, a sealing element, such as a sealing ring, is also provided between the bearing seat of the lower bearing assembly 8 and the inner wall of the lifting cylinder.

[0066] like Figure 2As shown, when the material circulation lifting device is installed in the mixing barrel 9 of the mixer, the lower part of the lifting cylinder 1 extends downward through the through hole at the bottom of the mixing barrel 9, and the upper part of the lifting cylinder 1 extends into the middle through hole of the barrel cover 10 of the mixing barrel 9, and the upper connecting plate 4 is fixed to the top of the barrel cover 10 of the mixing barrel 9. The drive motor 11 is fixed to the barrel cover 10 of the mixing barrel 9 through the motor base. The output shaft of the drive motor 11 is provided with a first pulley 12, and the top of the lifting screw 6 extending above the upper bearing assembly 7 is fixed with a second pulley 13. The conveyor belt 14 is wound around the first pulley 12 and the second pulley 13 to form a belt drive. The belt drive is preferably a synchronous belt drive.

[0067] The mixing tank 9 includes an upper cylindrical tank 21 and a circulating hopper 22. The bottom of the circulating hopper 22 is located on the lifting cylinder 1 at the circulating feed inlet group. Materials falling out from each circulating discharge port 3 return to the circulating hopper 22. The circulating hopper 22 has a conical structure, preferably a cylindrical structure. A finished product discharge pipe 27 and a circulating discharge pipe 30 are provided on the circulating hopper 22. A discharge valve is installed on the finished product discharge pipe 27, and a circulating discharge valve is installed on the circulating discharge pipe 30. Guided by the conical surface of the circulating hopper 22, the material flows and converges towards each circulating feed inlet 24, the finished product discharge pipe 27, and the circulating discharge pipe 30.

[0068] A more preferred embodiment is that the relationship between the outer diameter D of the material throwing disc 14 and the inner diameter d of the upper cylindrical barrel 21 of the mixing barrel 9 is: D = 1 / 3d ~ 2 / 3d.

[0069] In addition, to improve the support strength of the lifting cylinder 1, several support rods 28 are installed between the lifting cylinder 1 and the circulating hopper 22, such as... Figure 10 As shown, each support rod 28 is preferably distributed at a uniform interval around the lifting cylinder 1.

[0070] A bottom feeding hopper 31 is also installed on the lifting cylinder 1 at the feeding inlet group. The discharge port of the circulating discharge pipe 30 passes through the top feeding port of the bottom feeding hopper 31 and extends into the inner cavity of the bottom feeding hopper 31. The bottom feeding hopper 31 has a conical structure. The material in the bottom feeding hopper 31 flows and converges towards each feeding inlet 23 under the guidance of the conical surface of the bottom feeding hopper 31.

[0071] In this design, the top opening of the bottom feeding hopper 31 serves as the material feeding port for the mixer. The inspection port 25 is located outside the bottom feeding hopper 31. During the material lifting and circulation process, there are two forms. One is when both the discharge valve and the circulation discharge valve are closed. The material enters the lifting cylinder 1 through the feeding inlet 23, is lifted by the lifting screw 6 to each circulation discharge port 3, and then falls outward from each circulation discharge port 3. A portion of the material falling outward passes through the discharge holes 17 of each throwing disc and falls downward. The remaining material falling outward falls back into the circulation hopper 22 in an umbrella-like scattered manner through the throwing disc 14, and then is lifted again through each circulation inlet 24, circulating and scattering, thereby achieving the purpose of uniform mixing.

[0072] Another method involves the discharge valve being closed while the circulating discharge valve is open. Material is fed into the bottom hopper 31, and the material in the bottom hopper 31 enters the lifting cylinder 1 through the feeding inlet 23. It is then lifted by the lifting screw 6 to each circulating discharge port 3 and falls outward from each circulating discharge port 3. Some of the material falling outward passes through the discharge holes 17 of each throwing disc and falls downward. The remaining material falling outward falls back into the circulating hopper 22 in an umbrella-like scattered manner through the throwing disc 14. Then, it returns to the external feeding hopper 27 through the circulating discharge pipe 30 and is lifted again through the feeding inlet 23. The material is then circulated and scattered, thereby achieving the purpose of uniform mixing.

[0073] In practice, the two operations of material lifting and circulation are selected according to actual needs.

[0074] The material circulation lifting device described in this embodiment is used in the mixing tank 9 of the mixer for mixing. It has the advantages of uniform mixing and no damage to the material. It is suitable for mixing powder, granules or small flakes, and is especially suitable for mixing materials with stratification or extremely high uniformity requirements.

[0075] 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 material circulation and lifting device, characterized in that: include: The lifting cylinder has a set of feed inlets on the outer side wall at the bottom of the lifting cylinder, the feed inlet set consisting of at least one feed inlet; and a set of circulating discharge outlets on the outer side wall at the top of the lifting cylinder, the circulating discharge outlet set consisting of at least four circulating discharge outlets, and each circulating discharge outlet is evenly spaced around the lifting cylinder. The top opening of the lifting cylinder is covered by an upper connecting plate, and the bottom opening of the lifting cylinder is covered by a lower connecting plate; A lifting screw is provided in the inner cavity of the lifting cylinder. The upper part of the lifting screw is supported on the upper connecting plate by an upper bearing assembly, and the lower part of the lifting screw is supported on the lower connecting plate by a lower bearing assembly. The lifting screw is driven to rotate by a drive device, thereby lifting the material entering from each feed port to each circulating discharge port, and dropping it outward from each circulating discharge port. A material throwing disc is fixedly installed on the lifting cylinder, and the material throwing disc is located below the circulating discharge port group.

2. The material circulation and lifting device according to claim 1, characterized in that: The material discharge plate includes: a flat material discharge plate fixed on the lifting cylinder, which is smoothly curved and extended along the circumferential edge of the flat material discharge plate to form a downward-curved arc surface with a circular arc cross-section; and a number of material discharge holes that pass through the plate at intervals.

3. The material circulation and lifting device according to claim 2, characterized in that: Each circulating discharge port is at the same height, and the throwing disc is located at the lower edge of the circulating discharge port group; the discharge holes of each throwing disc are evenly distributed on the flat throwing disc; the cross-section of the downward-folding arc surface is a 1 / 4 circle shape.

4. A material circulation lifting device according to claim 1, 2, or 3, characterized in that: Several baffle rods are fixedly installed on the lifting screw located at the circulating discharge port group. The baffle rods are at the same height and are evenly distributed around the lifting cylinder. The distance between the outer end of each baffle rod and the axis of the lifting screw is less than the inner cylinder radius of the lifting cylinder.

5. A material circulation lifting device according to claim 1, 2, or 3, characterized in that: Two sets of baffle rods are installed from top to bottom on the lifting screw located at the circulating discharge port group: an upper baffle rod set and a lower baffle rod set; each baffle rod set consists of several baffle rods, and the number of baffle rods in each set is the same; the baffle rods in each set are at the same height, and the baffle rods in each set are evenly spaced around the lifting screw; the baffle rods in the upper baffle rod set and the baffle rods in the lower baffle rod set are staggered in vertical position; the distance between the outer end of each baffle rod in each set and the axis of the lifting screw is less than the inner radius of the lifting cylinder.

6. A material circulation and lifting device, characterized in that: include: The lifting cylinder has two sets of feed inlets spaced apart from bottom to top on its outer side wall at the bottom: a feeding feed inlet group and a circulating feed inlet group; the feeding feed inlet group consists of at least one feeding feed inlet, and all feeding feed inlets are at the same height; the circulating feed inlet group consists of at least four circulating feed inlets, and all circulating feed inlets are at the same height and are evenly spaced around the lifting cylinder. A set of circulating discharge ports is provided on the outer wall at the top of the lifting cylinder. The set of circulating discharge ports consists of at least four circulating discharge ports, and each circulating discharge port is evenly spaced around the lifting cylinder. The top opening of the lifting cylinder is covered by an upper connecting plate, and the bottom opening of the lifting cylinder is covered by a lower connecting plate; A lifting screw is provided in the inner cavity of the lifting cylinder. The upper part of the lifting screw is supported on the upper connecting plate by an upper bearing assembly, and the lower part of the lifting screw is supported on the lower connecting plate by a lower bearing assembly. The lifting screw is driven to rotate by a drive device, thereby lifting the material entering from each feeding inlet or each circulating inlet to each circulating outlet, and dropping it outward from each circulating outlet. A material throwing disc is fixedly installed on the lifting cylinder, and the material throwing disc is located below the circulating discharge port group.

7. A material circulation lifting device according to claim 6, characterized in that: The material discharge plate includes: a flat material discharge plate fixed on the lifting cylinder, which is smoothly curved and extended along the circumferential edge of the flat material discharge plate to form a downward-curved arc surface with a circular arc cross-section; and a number of material discharge holes that pass through the plate at intervals.

8. A material circulation lifting device according to claim 7, characterized in that: Each circulating discharge port is at the same height, and the throwing disc is located at the lower edge of the circulating discharge port group; the discharge holes of each throwing disc are evenly distributed on the flat throwing disc; the cross-section of the downward-folding arc surface is a 1 / 4 circle shape.

9. A material circulation lifting device according to claim 6, 7, or 8, characterized in that: Several baffle rods are fixedly installed on the lifting screw located at the circulating discharge port group. The baffle rods are at the same height and are evenly distributed around the lifting cylinder. The distance between the outer end of each baffle rod and the axis of the lifting screw is less than the inner cylinder radius of the lifting cylinder.

10. A material circulation lifting device according to claim 6, 7, or 8, characterized in that: Two sets of baffle rods are installed from top to bottom on the lifting screw located at the circulating discharge port group: an upper baffle rod set and a lower baffle rod set; each baffle rod set consists of several baffle rods, and the number of baffle rods in each set is the same; the baffle rods in each set are at the same height, and the baffle rods in each set are evenly spaced around the lifting screw; the baffle rods in the upper baffle rod set and the baffle rods in the lower baffle rod set are staggered in vertical position; the distance between the outer end of each baffle rod in each set and the axis of the lifting screw is less than the inner radius of the lifting cylinder.

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