Different-direction differential screw mechanism, kneading machine and material manufacturing system

Abstract

The utility model discloses an incongruous differential screw mechanism, a kneading machine and a material manufacturing system, the screw mechanism comprises a central screw and a peripheral screw which are in incongruous differential fit, and the screw mechanism is provided with a plurality of conveying areas and a plurality of kneading areas along the axial direction of the screws; the conveying areas and the kneading areas are arranged at intervals; the central screw and the peripheral screws are provided with a plurality of conveying units corresponding to the plurality of conveying areas, and are provided with a plurality of kneading units corresponding to the plurality of kneading areas; the conveying units of the central screw and the peripheral screws are meshed through spiral blades, and the kneading units are meshed through kneading blades. According to the screw mechanism, the conveying units and the kneading units are arranged on the screw at intervals in the axial direction, materials are continuously and alternately subjected to dispersing mixing and kneading mixing in the mixing and conveying process, the material conveying efficiency is guaranteed, meanwhile, the material mixing contact area is increased, and the material mixing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material mixing and dispersing, in particular to a heterodyning differential speed screw mechanism, a kneading machine and a material production system used for material mixing and dispersing. Background Art

[0002] The petroleum, chemical, rubber, plastic, pharmaceutical, food and other industries often involve mixing, shearing and plasticizing high-viscosity fluids. Extruders and kneaders are important equipment for mixing, shearing and plasticizing high-viscosity fluids.

[0003] Chinese invention patent 202010216298.5 discloses a counter-rotating differential speed extrusion device, in which a screw mechanism is arranged in a barrel, and the screw mechanism includes a first screw and a second screw, and the first screw and the second screw rotate in a counter-rotating differential speed at a fixed speed ratio; the top diameter and the root diameter of the first screw are always meshed with the root diameter and the top diameter of the second screw respectively, and at least one first intermediate circular arc structure is arranged between the root diameter and the top diameter of the first screw, and a second intermediate circular arc structure which is always tangent to the first intermediate circular arc structure is arranged between the root diameter and the top diameter of the second screw, and the first intermediate circular arc structure of the first screw and the second intermediate circular arc structure of the second screw are realized by opening the screw grooves of the two screws to each other, and the original closed C-type chamber positive displacement conveying unit is expanded to an "8"-type chamber positive displacement conveying unit, thereby increasing the mixing effect. The screw mechanism of this non-directional differential speed extruder achieves material mixing and conveying by the mutual meshing of the axial spiral blades of the first screw and the second screw. The contact area of ​​the mixing zone between the spiral blades of the two screws is small, resulting in a poor mixing effect. Although the first screw and the second screw expand the original closed C-chamber positive displacement conveying unit into an "8"-chamber positive displacement conveying unit through the first intermediate arc structure and the second intermediate arc structure tangent thereto to increase the contact area of ​​the mixing zone, there is still an axial closed structure of the screw groove on the screw mechanism. That is to say, the mixing zone of the positive displacement conveying unit between the first screw and the second screw is not fully penetrated along the axial direction, but is divided into several mixing sub-regions by the axial closed structure of the screw groove. Moreover, the material in the mixing sub-region is still mixed and conveyed by the meshing of the spiral blades. Therefore, the contact area of ​​the mixing sub-region is still relatively small, and the mixing effect of the material is still not ideal. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing differential-speed rotating extruders, the applicant provides a rationally structured differential-speed screw mechanism, a kneading machine, and a material production system. A plurality of conveying units and kneading units are arranged on the screw assembly to increase the contact area of ​​the mixing zone and improve the material mixing effect.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A differential-speed screw mechanism comprises a central screw and a peripheral screw matched with differential speeds in different directions. The screw mechanism is provided with a plurality of conveying areas and a plurality of kneading areas along the axial direction of the screw; the conveying areas and the kneading areas are arranged at intervals; the central screw and the peripheral screw are provided with a plurality of conveying units corresponding to the plurality of conveying areas, and a plurality of kneading units corresponding to the plurality of kneading areas; the conveying units of the central screw and the peripheral screw are meshed through spiral blades, and the kneading units are meshed through kneading blades.

[0007] As a further improvement of the above technical solution:

[0008] The conveying units of the central screw and the peripheral screw are generated by axially spirally twisting a radial cross section including a plurality of blades, and the output unit forms a plurality of spiral blades on the screw.

[0009] The kneading units of the central screw and the peripheral screws are generated by a plurality of kneading blades with a cross-sectional shape of a radial cross-section including a plurality of blades, which are stacked in an axial direction and deflected in a certain angle in the circumferential direction in sequence; from the feed end to the discharge end, the angular deflection direction of the kneading blades is opposite to the rotation direction of the screw.

[0010] The ratio of the deflection angle α of the central kneading blade of the central kneading unit to the deflection angle β of the peripheral kneading blade of the peripheral kneading unit is: α / β= n1 / n2.

[0011] The central radial cross-section of the central screw includes a plurality of central blades, and the peripheral radial cross-section of the peripheral screw includes a plurality of peripheral blades; the number of central blades is greater than or equal to the number of peripheral blades, and the number of central blades is an integer multiple of the peripheral blades; there is an engagement clearance c between the central blade root diameter of the central blade and the peripheral blade top diameter of the peripheral blade, c=b-(d1+D2) / 2=b-(D1+d2) / 2, and the engagement clearance c is 0.5mm-20mm.

[0012] The conveying area includes a feeding conveying area, an intermediate conveying area and a discharging conveying area, and a plurality of intermediate conveying areas and a plurality of kneading areas are arranged one by one; a first conveying unit, a second conveying unit and a third conveying unit are arranged on the central screw and the peripheral screw, the spiral direction of the first conveying unit is the same as the spiral direction of the second conveying unit, and the spiral direction of the third conveying unit is opposite to the spiral directions of the first conveying unit and the second conveying unit; the first output unit is arranged in the feeding conveying area, the second conveying unit is arranged in the intermediate conveying area, and the third conveying unit is arranged in the intermediate conveying area and / or the discharging conveying area.

[0013] The axial length L1 of the first conveying unit is greater than the axial length L2 of the second conveying unit, L1=(2~50)L2; the axial length L2 of the second conveying unit is equal to the axial length L4 of the third conveying unit; the axial length L3 of the kneading unit is greater than or equal to the axial length L2 of the second conveying unit, L3=(1.0~2.5)L2.

[0014] At least one peripheral screw is meshed with the outer circumference of the central screw.

[0015] A kneading machine, a screw mechanism is arranged in a mixing cylinder, one end of the screw mechanism is connected to a driving device, and the mixing cylinder and the driving device are arranged on a frame; the mixing cylinder is provided with at least one powder inlet, a plurality of liquid inlets, and a plurality of discharge ports, the powder inlet is arranged on one side of a feeding and conveying area of ​​the screw mechanism, and an upper discharge port and a lower discharge port are arranged on one side of a discharge and conveying area of ​​the screw mechanism.

[0016] A material production system includes a kneading machine, a powder batching system, a liquid batching system and several slurry dispersion systems. The powder batching system includes several powder silos and buffer silos. The powder silos are connected to the buffer silos through pipelines, and the buffer silos are connected to the powder inlet of the kneading machine through pipelines; the liquid batching system includes several liquid tanks, and the slurry dispersion system includes a slurry tank. A stirrer is arranged in the slurry tank; some liquid tanks are connected to the liquid inlet of the kneading machine through pipelines, and some liquid tanks are connected to the slurry dispersion system through pipelines.

[0017] The beneficial effects of the utility model are as follows:

[0018] The screw mechanism of the utility model is provided with a plurality of conveying units and kneading units at intervals along the axial direction on the screw. In the conveying area, the central screw and the peripheral screws continuously rub, disperse, mix and convey the materials forward through the meshing of the spiral blades of the conveying units, thereby improving the positive displacement conveying capacity and ensuring the positive conveying efficiency of the materials. In the kneading area, the central screw and the peripheral screws continuously knead the materials through the meshing of the kneading blades, so that the materials are more fully mixed, the mixing effect of the materials is increased, and the mixing capacity is improved. In the process of mixing and conveying, the materials are continuously and alternately subjected to dispersed mixing and kneading mixing, which not only ensures the material conveying efficiency, but also increases the contact area of ​​the material mixing and improves the mixing effect of the materials.

[0019] A meshing gap c is provided between the top diameter / root diameter of the central screw of the utility model and the root diameter / top diameter of the peripheral screws, so that the mixing area between the central screw and the peripheral screws is fully connected in the axial direction, which greatly increases the contact area of ​​the mixing area, thereby greatly improving the mixing effect of the materials and enhancing the material mixing capacity. Under the condition of the same mixing requirements, the overall length of the screw can be greatly shortened, the structure of the screw mechanism is simplified, and the wear of the screw is reduced.

[0020] The axial length of the first conveying unit of the utility model is set longer, which is beneficial to improve the positive displacement conveying capacity of the feed and facilitate the forward conveying of the material. The axial length of the kneading unit is greater than or equal to the axial length of the second conveying unit, the kneading path is longer, the material stays in the kneading unit for a longer time, and the kneading effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the first embodiment of the screw mechanism of the utility model.

[0022] Figure 2 It is a schematic diagram of the top structure of the first embodiment of the screw mechanism of the utility model.

[0023] Figure 3 It is a structural schematic diagram of a radial cross section of the first embodiment of the screw mechanism of the utility model.

[0024] Figure 4 Schematic diagram of the structure of the central conveying unit of the central screw.

[0025] Figure 5 Schematic diagram of the structure of the central kneading unit of the central screw.

[0026] Figure 6 The left side view of the central kneading unit with the central screw.

[0027] Figure 7 Schematic diagram of the structure of the peripheral conveying unit of the peripheral screw.

[0028] Figure 8 Schematic diagram of the structure of the peripheral kneading unit of the peripheral screw.

[0029] Fig. 9 Left side view of the peripheral kneading unit of the peripheral screw.

[0030] Fig.10 It is a structural schematic diagram of a radial cross section of a second embodiment of the screw mechanism of the utility model.

[0031] Fig.11 It is a structural schematic diagram of a radial cross section of a third embodiment of the screw mechanism of the utility model.

[0032] Fig.12 It is a structural schematic diagram of a radial cross section of a fourth embodiment of the screw mechanism of the utility model.

[0033] Fig.13 This is the main structural view of the kneading machine.

[0034] Fig.14 It is a schematic diagram of the top view of the kneading machine.

[0035] Fig.15 This is a structural diagram of the material production system.

[0036] In the figure: 100, screw mechanism; 101, feeding conveying area; 102, intermediate conveying area; 103, kneading area; 104, discharging conveying area;

[0037] 1. Central screw; 10. Central radial cross section; 11. Central conveying unit; 111. Central first conveying unit; 112. Central second conveying unit; 113. Central third conveying unit; 12. Central kneading unit; 13. Central paddle; 131. Central blade top diameter; 132. Central blade root diameter; 133. Central blade concave surface; 1331. First concave surface segment; 1332. Second concave surface segment; 14. Central spiral blade; 15. Central kneading blade;

[0038] 2. Peripheral screw; 20. Peripheral radial cross section; 21. Peripheral conveying unit; 211. Peripheral first conveying unit; 212. Peripheral second conveying unit; 213. Peripheral third conveying unit; 22. Peripheral kneading unit; 23. Peripheral blade; 231. Peripheral blade top diameter; 232. Peripheral blade root diameter; 233. Peripheral blade convex surface; 2331. Convex surface segment; 2332. Third concave surface segment; 24. Peripheral spiral blade; 25. Peripheral kneading blade;

[0039] 200, kneading machine; 201, frame; 202, mixing cylinder; 203, driving device; 204, powder inlet; 205, first liquid inlet; 206, second liquid inlet; 207, upper discharge port; 208, lower discharge port;

[0040] 300, powder batching system; 301, powder silo; 302, buffer silo;

[0041] 400, liquid batching system; 401, liquid tank;

[0042] 500. Slurry dispersion system; 501. Slurry tank; 502. Agitator. DETAILED DESCRIPTION

[0043] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0044] The first embodiment of the screw mechanism 100:

[0045] like Figure 1 , Figure 2As shown, the screw mechanism 100 described in the utility model includes a central screw 1 and a peripheral screw 2 with different directions and differential speeds, and the spiral directions of the central screw 1 and the peripheral screw 2 are opposite; the screw mechanism 100 is provided with a feeding conveying area 101, a plurality of intermediate conveying areas 102, a plurality of kneading areas 103, and a discharging conveying area 104 along the axial direction of the screw, and the plurality of intermediate conveying areas 102 and the plurality of kneading areas 103 are arranged one by one. The central screw 1 is provided with a plurality of central conveying units 11 and a plurality of central kneading units 12 corresponding to each area, and the peripheral screw 2 is also provided with a plurality of peripheral conveying units 21 and a plurality of peripheral kneading units 22 corresponding to each area; the central conveying unit 11 and the peripheral conveying unit 21 are meshed with each other and arranged in the conveying area to continuously disperse and mix the powder and the liquid and convey them forward; the central kneading unit 12 cooperates with the peripheral kneading unit 22 to continuously knead and mix the powder and the liquid and convey them forward.

[0046] The central conveying unit 11 of the central screw 1 includes a central first conveying unit 111, a plurality of central second conveying units 112, and a central third conveying unit 113. The central first conveying unit 111 is arranged in the feeding conveying area 101, the central second conveying unit 112 is arranged in the middle conveying area 102, the central third conveying unit 113 is arranged in the discharging conveying area 104, and the central kneading unit 12 is arranged in the kneading area 103. The peripheral conveying unit 21 of the peripheral screw 2 includes a peripheral first conveying unit 211, a plurality of peripheral second conveying units 212, and a peripheral third conveying unit 213. The peripheral first conveying unit 211 is arranged in the feeding conveying area 101, the peripheral second conveying unit 212 is arranged in the middle conveying area 102, the peripheral third conveying unit 213 is arranged in the discharging conveying area 104, and the peripheral kneading unit 22 is arranged in the kneading area 103. The screw mechanism 100 is provided with a plurality of conveying units and kneading units at intervals along the axial direction on the screw. During the mixing and conveying process, the material undergoes dispersed mixing and kneading mixing alternately, which not only ensures the material conveying efficiency, but also increases the contact area of ​​the material mixing, thereby improving the mixing effect of the material.

[0047] like Figure 2As shown, the spiral direction of the first conveying unit (located in the feeding conveying area 101) of the central screw 1 / peripheral screw 2 is the same as the spiral direction of the second conveying unit (located in the middle conveying area 102), and the spiral direction of the third conveying unit (located in the discharging conveying area 104) is opposite to the spiral directions of the first conveying unit and the second conveying unit. The screw discharging conveying area 104 is provided with a third conveying unit with an opposite spiral direction. After the material enters the third conveying unit, it will turn, which is beneficial to reduce the sealing pressure at the discharging end and improve the sealing life. In other embodiments, a third conveying unit with an opposite spiral direction can also be provided in the middle conveying area 102, which can extend the residence time of the material in the conveying area, extend the mixing time, and improve the mixing effect of the material. The axial length L1 of the first conveying unit is greater than the axial length L2 of the second conveying unit, L1=(2~50)L2. The axial length of the first conveying unit located in the feeding conveying area 101 is set longer, which is beneficial to improve the positive displacement conveying capacity of the feed and facilitate the forward conveying of the material. The axial length L2 of the second conveying unit is equal to the axial length L4 of the third conveying unit. The axial length L3 of the kneading unit is greater than or equal to the axial length L2 of the second conveying unit, L3=(1.0-2.5)L2, the kneading path is longer, the material stays in the kneading unit for a longer time, and the kneading effect is better.

[0048] The rotation speed n1 of the central screw 1 is less than or equal to the rotation speed n2 of the peripheral screw 2, n2 / n1≧1, and the rotation speed n2 is an integer multiple of the rotation speed n1, which is convenient for the processing and manufacturing of the screw. The ratio of the pitch S1 of the central screw 1 to the pitch S2 of the peripheral screw 2 is: S1 / S2=n1 / n2.

[0049] like Figure 3As shown, the central radial cross-section 10 of the central screw 1 includes a plurality of central blades 13, and the peripheral radial cross-section 20 of the peripheral screw 2 includes a plurality of peripheral blades 23. The number of central blades 13 and the number of peripheral blades 23 can be equal, and the number of central blades 13 can also be an integer multiple of the peripheral blades 23. In this embodiment, there are four central blades 13 and two peripheral blades 23. The central blade 13 includes a central blade top diameter 131 and a central blade root diameter 132, and the peripheral blade 23 includes a peripheral blade top diameter 231 and a peripheral blade root diameter 232; the diameter D1 of the central blade top diameter 131 is equal to the diameter D2 of the peripheral blade top diameter 231, and the diameter d1 of the central blade root diameter 132 is equal to the diameter d2 of the peripheral blade root diameter 232; the distance b between the center point O1 of the central screw 1 and the center point O2 of the peripheral screw 2 is greater than (d1+D2) / 2, or greater than (D1+d2) / 2, that is, there is a meshing gap c between the central blade root diameter 132 of the central blade 13 and the peripheral blade top diameter 231 of the peripheral blade 23, and there is also a meshing gap c between the central blade top diameter 131 of the central blade 13 and the peripheral blade root diameter 232 of the peripheral blade 23, c=b-(d1+D2) / 2=b-(D1+d2) / 2, and the meshing gap c is 0.5mm-20mm. A meshing gap c is set between the top diameter / root diameter of the central screw 1 and the root diameter / top diameter of the peripheral screw 2, so that the mixing area between the central screw 1 and the peripheral screw 2 is fully connected in the axial direction, which greatly increases the contact area of ​​the mixing area, thereby greatly improving the mixing effect of the material and enhancing the material mixing capacity. Under the same mixing requirements, the overall length of the screw can be greatly shortened, the structure of the screw mechanism 100 is simplified, and the wear of the screw is reduced.

[0050] The central blades 13 of the central screw 1 are formed by extending outward from the screw along the direction of rotation thereof and facing the peripheral screw 2. The peripheral screw 2 is formed by extending outward from the screw along the direction of rotation thereof and facing the central screw 1. The rotation direction of the peripheral blades 23 is opposite to that of the central blades 13. A central blade concave surface 133 is provided on one side of the central blade 13 along the direction of rotation thereof and facing the peripheral blades 23. The central blade concave surface 133 includes an outer first concave surface section 1331 and an inner second concave surface section 1332. Figure 3 The AB curve segment is the first concave segment 1331, and the BC curve segment is the second concave segment 1332. The peripheral blade 23 is provided with a peripheral blade convex surface 233 along the rotation direction thereof and on the side facing the central blade 13. The peripheral blade convex surface 233 includes an outer convex surface segment 2331 and an inner third concave surface segment 2332. Figure 3, the DE curve segment is the convex segment 2331 , and the EF curve segment is the third concave segment 2332 . The first concave section 1331 of the central blade 13 and the convex section 2331 of the peripheral blade 23 serve as material kneading sections for the two, and cooperate with each other to knead the material; the ratio of the arc length L1 of the first concave section 1331 to the arc length L2 of the convex section 2331 is: L1 / L2=n1 / n2; there is a spacing between the first concave section 1331 and the convex section 2331, forming a kneading gap e, and the kneading gap e is 0.1mm-10mm. The kneading gap e between the first concave section 1331 and the convex section 2331 is equal from the beginning of meshing (the two enter the envelope fit) to the end of meshing (the two leave the envelope fit), that is, when the first concave section 1331 and the convex section 2331 are kneading the material in the envelope, the kneading gap e remains unchanged, which ensures the forward conveying of the material while also allowing the material to be fully kneaded and mixed, thereby improving the mixing effect of the material.

[0051] like Figure 4 As shown, the central conveying unit 11 of the central screw 1 is generated by the central radial cross section 10 being twisted along the axial direction with a pitch S1, and a plurality of central spiral blades 14 are formed on the central screw 1 corresponding to the plurality of central blades 13; from the feed end to the discharge end, the spiral twisting direction of the central first conveying unit 111 and the central second conveying unit 112 is opposite to the rotation direction of the central screw 1, and the spiral twisting direction of the central third conveying unit 113 is the same as the rotation direction of the central screw 1. Figure 5 , Figure 6 As shown, the central kneading unit 12 of the central screw 1 is composed of a plurality of central kneading blades 15 with a cross-sectional shape of a central radial cross-section 10, which are stacked in the axial direction and are deflected in the circumferential direction at a certain angle α from the feed end to the discharge end. The angle between the center lines of two adjacent central kneading blades 15 (the central blade deflection angle α) is equal. From the feed end to the discharge end, the angular deflection direction of the central kneading blades 15 is opposite to the rotation direction of the central screw 1.

[0052] like Figure 7 As shown, the peripheral conveying unit 21 of the peripheral screw 2 is generated by the peripheral radial cross section 20 with a pitch S2 along the axial spiral twist, and a plurality of peripheral spiral blades 24 are formed on the peripheral screw 2 corresponding to the plurality of peripheral blades 23; from the feed end to the discharge end, the spiral twisting direction of the peripheral first conveying unit 211 and the peripheral second conveying unit 212 is opposite to the rotation direction of the peripheral screw 2, and the spiral twisting direction of the peripheral third conveying unit 213 is the same as the rotation direction of the peripheral screw 2. Figure 8 , Fig. 9As shown, the peripheral kneading unit 22 of the peripheral screw 2 is composed of a plurality of peripheral kneading blades 25 with a cross-sectional shape of a peripheral radial cross-section 20, which are stacked in the axial direction and are deflected by a certain angle β in the circumferential direction from the feed end to the discharge end, that is, the angle between the center lines of two adjacent peripheral kneading blades 25 (peripheral blade deflection angle β) is equal, and the angular deflection direction of the peripheral kneading blades 25 is opposite to the rotation direction of the peripheral screw 2 from the feed end to the discharge end. The ratio of the deflection angle α of the central kneading blade 15 of the central kneading unit 12 to the deflection angle β of the peripheral kneading blade 25 of the peripheral kneading unit 22 is: α / β=n1 / n2.

[0053] like Figure 1 , Figure 2 As shown, in the conveying area (feeding conveying area 101, intermediate conveying area 102, and discharging conveying area 104), the central screw 1 and the peripheral screw 2 continuously rub, disperse, mix, and convey the materials forward through the meshing of the spiral blades of the conveying unit, thereby improving the positive displacement conveying capacity and ensuring the positive conveying efficiency of the materials. In the kneading area 103, the central screw 1 and the peripheral screw 2 continuously knead the materials through the meshing of the kneading blades, so that the materials are mixed more fully, the mixing effect of the materials is increased, and the mixing capacity is improved.

[0054] Second embodiment of the screw mechanism 100:

[0055] like Fig.10 As shown, different from the first embodiment, the screw mechanism 100 of this embodiment includes a central screw 1 and two peripheral screws 2 with different directions and differential speeds, the three screws are arranged in a row, and the two peripheral screws 2 are located on the left and right sides of the central screw 1. The three-screw screw mechanism 100 has better mixing effect and output, and higher efficiency.

[0056] The third embodiment of the screw mechanism 100:

[0057] like Fig.11 As shown, different from the second embodiment, the screw mechanism 100 of this embodiment includes a central screw 1 and four peripheral screws 2 with different directions and differential speeds, the five screws are arranged in a "cross" shape, and the four peripheral screws 2 are located on the left and right sides and the upper and lower sides of the central screw 1. The multi-screw screw mechanism 100 further improves the mixing effect, output and efficiency.

[0058] Fourth embodiment of the screw mechanism 100:

[0059] like Fig.12 As shown, unlike the first embodiment, the number of the central blades 13 of the central screw 1 of this embodiment is equal to the number of the peripheral blades 23 of the peripheral screw 2, both of which are two. The central screw 1 and the peripheral screw 2 are provided with the same number of blades, which makes the structure simpler and more convenient to assemble.

[0060] Embodiment of kneading machine 200:

[0061] like Fig.13 , Fig.14 As shown, a mixing cylinder 202 and a driving device 203 are arranged on the frame 201 of the kneading machine 200, and the screw mechanism 100 is arranged in the mixing cylinder 202, and one end of the screw mechanism 100 is connected to the driving device 203. The mixing cylinder 202 is provided with at least one powder inlet 204, a plurality of liquid inlets, and a plurality of discharge ports. In this embodiment, the mixing cylinder 202 is provided with a first liquid inlet 205 and a second liquid inlet 206, an upper discharge port 207 and a lower discharge port 208. The powder inlet 204 is arranged on one side of the feeding and conveying area 101 of the screw mechanism 100, and the upper discharge port 207 and the lower discharge port 208 are arranged on one side of the discharge and conveying area 104 of the screw mechanism 100.

[0062] Example of material production system:

[0063] like Fig.15 As shown, the material production system includes the above-mentioned kneading machine 200, the powder batching system 300, the liquid batching system 400 and several slurry dispersion systems 500. The powder batching system 300 includes several powder bins 301 and buffer bins 302, the powder bins 301 are connected to the buffer bins 302 through pipelines, and the buffer bins 302 are connected to the powder inlet 204 of the kneading machine 200 through pipelines. The liquid batching system 400 includes several liquid tanks 401, and some of the liquid tanks 401 are connected to the liquid inlet of the kneading machine 200 through pipelines. The slurry dispersion system 500 includes a slurry tank 501, an agitator 502 is arranged in the slurry tank 501, the material outlet of the kneading machine 200 is connected to the slurry tank 501, and some of the liquid tanks 401 of the liquid batching system 400 are also connected to the slurry tank 501 through pipelines. In actual use, the powder of the powder batching system 300 is added into the kneading machine 200 through the powder inlet 204, and the liquid of the liquid batching system 400 is added into the kneading machine 200 through the liquid inlet. After the powder and the liquid are fully mixed in the kneading machine 200, they are output from the discharge port to the slurry dispersion system 500, and are further mixed and dispersed with the liquid in the slurry dispersion system 500.

[0064] The above description is an explanation of the utility model, not a limitation of the utility model. The utility model can be modified in any form without violating the spirit of the utility model.

Claims

1. A differential screw mechanism, comprising a central screw (1) and a peripheral screw (2) in a differentially matched manner, characterized in that: The screw mechanism (100) is provided with a plurality of conveying zones and a plurality of kneading zones (103) along the axial direction of the screw; the conveying zones and the kneading zones (103) are arranged at intervals; the central screw (1) and the peripheral screw (2) are provided with a plurality of conveying units corresponding to the plurality of conveying zones, and a plurality of kneading units corresponding to the plurality of kneading zones (103); the conveying units of the central screw (1) and the peripheral screw (2) are meshed with each other through spiral blades, and the kneading units are meshed with each other through kneading blades.

2. The differential screw mechanism according to claim 1, characterized in that: The conveying unit of the central screw (1) and the peripheral screw (2) is generated by axially twisting a radial cross section containing a plurality of blades, and the output unit forms a plurality of spiral blades on the screw.

3. The differential screw mechanism according to claim 1, characterized in that: The kneading unit of the central screw (1) and the peripheral screw (2) is generated by a plurality of kneading blades having a cross-sectional shape of a radial cross-section including a plurality of blades, which are stacked in an axial direction and deflected in turn in a circumferential direction by a certain angle; from the feed end to the discharge end, the angular deflection direction of the kneading blades is opposite to the rotation direction of the screw.

4. The differential screw mechanism according to claim 3, characterized in that: The ratio of the deflection angle α of the central kneading blade (15) of the central kneading unit (12) to the deflection angle β of the peripheral kneading blade (25) of the peripheral kneading unit (22) is: α / β=n1 / n2.

5. The differential screw mechanism according to claim 1, characterized in that: The central radial cross section (10) of the central screw (1) includes a plurality of central blades (13), and the peripheral radial cross section (20) of the peripheral screw (2) includes a plurality of peripheral blades (23); the number of the central blades (13) is greater than or equal to the number of the peripheral blades (23), and the number of the central blades (13) is an integer multiple of the peripheral blades (23); there is a meshing clearance c between the central blade root diameter (132) of the central blade (13) and the peripheral blade tip diameter (231) of the peripheral blade (23), c=b-(d1+D2) / 2=b-(D1+d2) / 2, and the meshing clearance c is 0.5mm-20mm.

6. The differential screw mechanism according to claim 1, characterized in that: The conveying area comprises a feed conveying area (101), an intermediate conveying area (102) and a discharge conveying area (104), wherein a plurality of intermediate conveying areas (102) and a plurality of kneading areas (103) are arranged in a spaced relationship; a first conveying unit, a second conveying unit and a third conveying unit are arranged on the central screw (1) and the peripheral screw (2); the spiral direction of the first conveying unit is the same as the spiral direction of the second conveying unit, and the spiral direction of the third conveying unit is opposite to the spiral directions of the first conveying unit and the second conveying unit; the first output unit is arranged in the feed conveying area (101), the second conveying unit is arranged in the intermediate conveying area (102), and the third conveying unit is arranged in the intermediate conveying area (102) and / or the discharge conveying area (104).

7. The differential screw mechanism according to claim 6, characterized in that: The axial length L1 of the first conveying unit is greater than the axial length L2 of the second conveying unit, L1=(2~50)L2; the axial length L2 of the second conveying unit is equal to the axial length L4 of the third conveying unit; the axial length L3 of the kneading unit is greater than or equal to the axial length L2 of the second conveying unit, L3=(1.0~2.5)L2.

8. The differential screw mechanism according to claim 1, characterized in that: At least one peripheral screw (2) is meshedly arranged on the periphery of the central screw (1).

9. A kneading machine, characterized in that: The screw mechanism described in any one of claims 1 to 8 is arranged in a mixing barrel (202), one end of the screw mechanism (100) is connected to a driving device (203), and the mixing barrel (202) and the driving device (203) are arranged on a frame (201); at least one powder inlet (204), a plurality of liquid inlets, and a plurality of discharge ports are arranged on the mixing barrel (202), the powder inlet (204) is arranged on one side of a feeding and conveying area (101) of the screw mechanism (100), and an upper discharge port (207) and a lower discharge port (208) are arranged on one side of a discharge and conveying area (104) of the screw mechanism (100).

10. A material production system, characterized in that: The kneading machine comprises the kneading machine as claimed in claim 9, and further comprises a powder batching system (300), a liquid batching system (400) and a plurality of slurry dispersion systems (500), wherein the powder batching system (300) comprises a plurality of powder bins (301) and a buffer bin (302), wherein the powder bin (301) is connected to the buffer bin (302) via a pipeline, and the buffer bin (302) is connected to a powder inlet (204) of the kneading machine (200) via a pipeline; the powder batching system (400) comprises a plurality of liquid tanks (401), and the slurry dispersion system (500) comprises a slurry tank (501), wherein an agitator (502) is arranged in the slurry tank (501); a portion of the liquid tank (401) is connected to the liquid inlet of the kneading machine (200) via a pipeline, and a portion of the liquid tank (401) is connected to the slurry dispersion system (500) via a pipeline.

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