Double-transmission high-speed mixer and material mixing method

Abstract

The invention relates to a material mixing method and a material mixing method, a differential stirring and mixing mode is adopted, and the mixing process of the same batch of materials in a container comprises the following steps: a feeding stage: the materials firstly rise along the inner wall under the thrust and centrifugal force of a stirring paddle group; in the stirring stage, the materials are scattered and mixed by the dispersing paddles in the stirring paddle group, and in the blowback stage, the detained materials are blown back and raised by an air vent positioned in the container or communicated with the interior of the container, and are mixed with the materials in the container again. One set of transmission mechanism drives the dust raising blades to rotate at a low speed, the other set of transmission mechanism drives the upper scattering blades to rotate at a high speed, differential material raising and scattering mixing are adopted, local power consumption is reduced, the probability of super-current operation is reduced, and the material mixing uniformity is improved through multiple times of mixing.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed mixers, in particular to a double-drive high-speed mixer and a material mixing method. Background Art

[0002] High-speed mixers are one of the essential equipment in plastic processing plants and are widely used in many industries. High-speed mixers are especially used in premixing of powder coatings, coating of metal powders, mixing of battery materials, etc.

[0003] In the prior art, the high-speed mixer is prone to the following problems during the stirring process:

[0004] The transmission structure of the high-speed mixer is a single-shaft transmission. The dust-raising paddle and the dispersing paddle are driven by the same transmission mechanism with the same speed, consuming a large amount of power and placing high demands on equipment design and manufacturing.

[0005] In addition, when mixing high-density materials, the equipment is prone to overcurrent operation at a speed lower than the rated speed. For some materials with higher hardness, the blades are prone to wear during the mixing process. Summary of the invention

[0006] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a rationally structured dual-drive high-speed mixer and a material mixing method, in which the dispersion paddle and the dust-raising paddle are designed as a differential transmission structure. The dust-raising paddle rotates at high speed to lift the material; the dispersion paddle rotates at low speed to reduce the possibility of being worn by high-hardness materials.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A material mixing method adopts a differential stirring mixing method. The mixing process of the same batch of materials in a container includes:

[0009] Feeding stage: the material is pushed up along the inner wall by the thrust of the stirring paddle group and the centrifugal force, and then falls down by gravity.

[0010] Mixing stage: the materials are dispersed and mixed by the dispersing paddles in the mixing paddle group.

[0011] Back-blowing stage: The back-blowing airflow generated in the container or connected to the container will back-blow the retained material and mix it with the material in the container again.

[0012] As a further improvement of the above technical solution:

[0013] After the material enters the container, it is first lifted and then dispersed.

[0014] The lifting speed of the stirring paddle group is lower than the breaking speed.

[0015] A double-drive high-speed mixer suitable for a material mixing method comprises a frame component, a bearing cavity component and a container component located on the top of the bearing cavity component are arranged on the frame component; a kettle cover component is provided on the mouth of the container component, and a stirring paddle component is built in the container component.

[0016] The stirring paddle component comprises:

[0017] The dust-raising paddle is driven by the bearing cavity components.

[0018] The dispersion paddle group is coaxially arranged above the dust raising paddle and is driven by the bearing cavity components.

[0019] The speeds of the dust-raising and dispersing paddles are different.

[0020] The bearing cavity component is used to provide differential power to the stirring paddle component.

[0021] As a further improvement of the above technical solution:

[0022] Each group of dispersing blades of the dispersing blade group rotates at the same speed or at a differential speed.

[0023] The blades of the dust raising paddle and the dispersing paddle group are all arranged at an inclination, and the inclination directions are the same.

[0024] The bearing cavity component includes at least one group of transmission structures with independent output speeds, and each group of transmission structures includes:

[0025] The power source, mounted on the frame assembly,

[0026] The main shaft is hollow and connected to the power source with a belt transmission.

[0027] The rotary joint is connected to the bottom of the main shaft, and a medium flows between the rotary joint and the main shaft.

[0028] The main shafts of the multiple transmission structures are coaxially sleeved, and the output speed of each transmission structure is output to the corresponding blade at a fixed point.

[0029] A discharge port is arranged at the bottom of the container component, a discharge plug is arranged between the discharge port and the inner cavity of the container component, and a cylinder is arranged outside the container component, and the piston rod of the cylinder pushes the discharge plug to control the on-off of the material output path.

[0030] The discharge port is provided with at least one back-blowing hole, and the back-blowing hole receives air to back-blow the material.

[0031] The outer wall of the container part is provided with jackets which act independently of each other, and partitions are arranged between adjacent jackets.

[0032] The beneficial effects of the present invention are as follows:

[0033] 1. Two stirring motors are arranged in the present invention, which respectively drive and adjust two sets of transmission mechanisms; one set of transmission mechanisms drives the dust raising blades to rotate at a low speed, and the other set of transmission mechanisms drives the upper dispersing blades to rotate at a high speed, the dust raising blades lift the materials, and the dispersing blades lift the materials and scatter the materials at the same time; when the materials are put into the stirring tank from the feed inlet, under the thrust and centrifugal force of the stirring paddles of the high-speed mixer, the materials are thrown toward the inner wall in the cylinder, rise along the inner wall, fall under the action of gravity, and continue to participate in mixing. This is the first mixing, and the materials can achieve the purpose of uniform and sufficient mixing and coating in a relatively short time.

[0034] 2. The combined blades of the stirring paddle are tilted at a set angle, which increases the mixing area between the blades and the material, is conducive to uniform mixing, can ensure the adequacy of the mixing, and effectively shorten the mixing time. The stirring of the stirring paddle in direct contact with the material is the second mixing, which further improves the mixing degree.

[0035] 3. The blades are designed to be wear-resistant. The blades are made of 2205 material and are nitrided to extend the service life of the stirring blades.

[0036] 4. The jacket is equipped with two sets of independent temperature control systems to achieve separate temperature control of the materials during the mixing process, and a thermometer is provided to measure the temperature of the materials.

[0037] 5. The discharge port at the bottom of the side wall adopts a pneumatic structure, is designed with a mirror component, and has a back-blowing function. The main purpose of the back-blowing function is to facilitate the discharge of materials. The present application also proposes an adoptable implementation method, in which a vent can be added to the side wall of the container or the bottom of the container. At this time, the airflow blown into the vent can be blown into the container, acting on the material, blowing the material in the stirring chamber to lift the material, that is, the third material mixing, to further mix the material evenly.

[0038] The inside of the discharge hole adopts a plug design, and the lowest point is lower than the bottom of the container to prevent material accumulation in the discharge hole area; the air blowing structure blows air evenly to various areas around the discharge port through the air pipe to lift up the material that may accumulate on the wall of the cylinder and discharge it from the discharge port; when the mixing is completed and the discharge is completed, the cylinder is used to move the discharge plug outward to the extreme position, and the material is discharged along the discharge hole, and the discharge of the material at the discharge hole can be clearly observed through the sight glass component. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is the front view of the high mixer of the present invention.

[0040] Figure 2 It is a side view of the high-speed mixer of the present invention.

[0041] Figure 3 It is a schematic diagram of the dual-transmission stirring structure of the present invention.

[0042] Figure 4 It is the front view of the stirring chamber of the present invention.

[0043] Figure 5 It is a side view of the stirring chamber of the present invention.

[0044] Among them: 10, container component; 20, kettle cover component; 30, bearing chamber component; 40, frame component; 50, stirring paddle component;

[0045] 101, first jacket; 102, partition; 103, second jacket; 104, first thermometer connector; 105, second thermometer connector; 106, first jacket inlet; 107, first jacket outlet; 108, second jacket inlet; 109, second jacket outlet; 110, sight glass hole; 111, first backflush hole; 112, second backflush hole; 113, discharge port; 114, cylinder; 115, mounting seat; 116, discharge plug;

[0046] 301, rotary joint; 302, hexagonal nut; 303, spring washer; 304, flat washer; 305, screw; 306, mounting flange; 307, first spindle; 308, first V-belt pulley; 309, first flat key; 310, second V-belt pulley; 311, second flat key; 312, second spindle; 313, bearing cavity; 314, mounting plate;

[0047] 501, dust-raising paddle; 502, first dispersing paddle; 503, second dispersing paddle; 504, nut. DETAILED DESCRIPTION

[0048] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0049] like Figure 1 As shown, the material mixing method of this embodiment adopts a differential stirring mixing method, and the mixing process of the same batch of materials in the container includes:

[0050] Feeding stage: the material is pushed up along the inner wall by the thrust of the stirring paddle group and the centrifugal force, and then falls down by gravity.

[0051] Mixing stage: the materials are dispersed and mixed by the dispersing paddles in the mixing paddle group.

[0052] Blowback stage: The blowback airflow generated in the container or connected to the container blows the retained material back and mixes it with the material in the container again

[0053] After the material enters the container, it is first lifted and then dispersed.

[0054] The lifting speed of the stirring paddle group is lower than the breaking speed.

[0055] The dual-drive high-speed mixer of this embodiment applicable to the above-mentioned material mixing method comprises a frame component 40, on which a bearing cavity 313 component 30 and a container component 10 located on the top of the bearing cavity 313 component 30 are arranged; the mouth of the container component 10 is covered with a kettle cover component 20, and the container component 10 has a built-in stirring paddle component 50.

[0056] The stirring paddle component 50 includes:

[0057] The dust-raising paddle 501 is driven by the bearing chamber 313 component 30,

[0058] The dispersion paddle group is coaxially arranged above the dust raising paddle 501 and is driven by the bearing cavity 313 component 30.

[0059] The dust-raising paddle 501 and the dispersing paddle group have different rotation speeds.

[0060] The bearing cavity 313 component 30 is used to provide differential power to the stirring paddle component 50 .

[0061] Each group of dispersing blades of the dispersing blade group rotates at the same speed or at a differential speed.

[0062] The blades of the dust-raising paddle 501 and the dispersing paddle group are all arranged obliquely, and the oblique directions are the same.

[0063] The bearing cavity 313 component 30 includes at least one set of transmission structures with independent output speeds, each set of transmission structures including:

[0064] A power source, mounted on the frame member 40,

[0065] The main shaft is hollow and connected to the power source with a belt transmission.

[0066] The rotary joint 301 is connected to the bottom of the main shaft, and a medium flows between the rotary joint 301 and the main shaft.

[0067] The main shafts of the multiple transmission structures are coaxially sleeved, and the output speed of each transmission structure is output to the corresponding blade at a fixed point.

[0068] A discharge port 113 is provided at the bottom of the container part 10, and a discharge plug 116 is provided between the discharge port 113 and the inner cavity of the container part 10. A cylinder 114 is provided outside the container part 10, and the piston rod of the cylinder 114 pushes the discharge plug 116 to control the on-off of the material output path.

[0069] The discharge port 113 is provided with at least one back-blowing hole, and the back-blowing hole receives air to back-blow the material.

[0070] The outer wall of the container part 10 is provided with jackets that act independently of each other, and partitions 102 are provided between adjacent jackets.

[0071] The specific structure and working principle of the present invention are as follows:

[0072] like Figure 1 and Figure 2 As shown, the present invention provides a high-speed mixer, including a frame component 40, a container component 10 is arranged on the side of the frame component 40, and the mouth of the container component 10 is covered with a kettle cover component 20. The bottom of the container component 10 is provided with a mounting plate 314 connected to the frame component 40 as a support. A bearing cavity 313 component 30 is arranged below the container component 10, and the bearing cavity 313 component 30 is a power source to drive the stirring paddle component 50 located in the container component 10 to move.

[0073] The container part 10 is provided with a jacket outside, and the jacket is divided into a second jacket 103 wrapped around the upper half of the container part 10 and a first jacket 101 wrapped around the lower half of the container part 10. A discharge port 113 is provided on the side wall of the container part 10, and a first jacket 101 inlet, a first jacket 101 outlet, and a first thermometer connector 104 are provided on the first jacket 101; a second jacket 103 inlet, a second jacket 103 outlet, and a second thermometer connector 105 are provided on the second jacket 103.

[0074] The two jackets of the container part 10 are separated by a partition 102, so that they become two independently acting temperature control systems.

[0075] The inlets of the two jackets are respectively introduced with heating or cooling medium for heat exchange, so as to achieve the purpose of individually controlling the temperature of the materials during the mixing process. Since the materials are mainly mixed and stirred in the lower part of the container, the first jacket 101 is provided with a first thermometer connector 104 and a second thermometer connector 105 at different axial heights and circumferential angles in the lower half, which are respectively connected to the first thermometer and the second thermometer to measure the temperature of the materials at different axial heights, and adjust the temperature and flow rate of the medium entering the jacket through the real-time transmitted temperature signal.

[0076] As a technical point of the present invention, the bearing cavity 313 component 30 is provided with two sets of transmission mechanisms, which are respectively used to provide different rotation speeds to drive the dust raising paddle 501 to rotate at a low speed and the dispersion paddle to rotate at a high speed.

[0077] like Figure 3 As shown, the two transmission mechanisms include a first transmission mechanism and a second transmission mechanism. The first transmission mechanism includes a first transmission motor mounted on a frame, and the first transmission motor drives a first main shaft 307 through a first V-belt pulley 308 and a first flat key 309.

[0078] The second transmission mechanism includes a second transmission motor on the frame, and a second main shaft 312 driven by the second transmission motor through a second V-belt pulley 310 and a second flat key 311 .

[0079] The first main shaft 307 and the second main shaft 312 are coaxially sleeved, and the second main shaft 312 is sleeved outside the first main shaft 307 .

[0080] A hollow flow channel is opened inside the first main shaft 307, and a rotary joint 301 is set at the lower end of the first main shaft 307; the rotary joint 301 and the first main shaft 307 are connected in sequence through a hexagonal nut 302 with a specification of M12, a spring washer 303 with a specification of 12, a flat washer 304 with a specification of 12, a screw 305, and a mounting flange 306.

[0081] An oil seal and air seal combined sealing structure is used between the first main shaft 307 and the stirring paddle component 50. Nitrogen is introduced into the hollow flow channel of the first main shaft 307 through the interface of the rotary joint 301 to ensure sealing, thereby extending the service life of the oil seal.

[0082] The dispersing paddles of the stirring paddle component 50 include a first dispersing paddle 502 and a second dispersing paddle 503, and only one group of dust-raising paddles 501 is provided. The second dispersing paddle 503, the first dispersing paddle 502 and the dust-raising paddle 501 are arranged in sequence from top to bottom in the vertical direction; the blade size of the second dispersing paddle 503 is smaller than the blade size of the first dispersing paddle 502. The first dispersing paddle 502 and the second dispersing paddle 503 are driven by the first main shaft 307 to rotate at high speed, and the dust-raising paddle 501 is driven by the second main shaft 312 to rotate at low speed.

[0083] The function of the dust raising paddle 501 is to raise the material during the low-speed stirring process. When the material is raised to the dispersion paddle, it is dispersed by the high-speed rotating dispersion paddle with double blades.

[0084] Among all the blades, every two adjacent blades are arranged at 90° intervals in the horizontal direction. The blades of the dust-raising paddle 501 are inclined at a certain angle to the horizontal plane, and the angle range is an acute angle. The blades of the first dispersing paddle 502 and the second dispersing paddle 503 are also set at an acute angle to the horizontal plane. This inclined arrangement of the blades can fully expand the mixing area, increase the mixing area between the blades and the material, is conducive to uniform mixing, and ensures the adequacy of the mixing, effectively shortens the mixing time, and improves work efficiency.

[0085] All blade edges are rounded to gently break up the material. In one embodiment of the present invention, the blades are designed to be wear-resistant, specifically: the blades are made of 2205 duplex stainless steel and nitrided to extend the service life of the stirring blades.

[0086] The side bottom discharge port 113 of the container part 10 adopts a pneumatic structure, and the specific composition of the pneumatic structure is as follows: Figure 4 and Figure 5As shown, a discharge plug 116 is installed inside the discharge port 113, and the discharge plug 116 remains closed during the stirring process, separating the container part 10 from the discharge port 113; and the discharge plug 116 is driven by the cylinder 114, and the cylinder 114 is located outside the discharge port 113. The arc surface of the discharge plug 116 is flush with the inner wall of the container part 10, preventing material accumulation in the area of ​​the mounting seat 115 at the discharge port 113. When discharging, the piston rod of the cylinder 114 moves the discharge plug 116 to the extreme position along the output direction, and the material is discharged along the discharge port 113; the first back-blowing hole 111 and the second back-blowing hole 112 at the discharge port 113 blow away the material adhering to the inner wall of the discharge port 113 to discharge the material; the blowing here is mainly to facilitate the discharge of the material, and the blown material may not necessarily enter the container.

[0087] As an optimized implementation, vents are added to the side wall or bottom of the container, and the back-blowing holes with the same structure as the first back-blowing holes and the second back-blowing holes are used. The airflow of these back-blowing holes can pass into the container. The back-blowing holes are set according to the shape of the container so that the output airflow path of the back-blowing holes can pass through the corners of the container, the gap formed by the installation of the container and the stirring paddle, etc., so that the materials in these dead corners can be lifted again. Or according to the actual use, the material can be lifted in the stirring process or in the stirring gap to improve the mixing uniformity.

[0088] A sight glass hole 110 is also designed at the discharge port 113, through which the discharge of materials can be observed at any time.

[0089] The advantages of the present invention are that it adopts differential lifting and dispersed mixing to reduce local power consumption, reduce the probability of overcurrent operation, and improve the uniformity of the mixture through multiple mixing.

[0090] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A material mixing method, characterized in that: Using differential speed mixing, the mixing process of the same batch of materials in the container includes: Feeding stage: the material is pushed up along the inner wall by the thrust of the stirring paddle group and the centrifugal force, and then falls down by gravity. Mixing stage: the materials are dispersed and mixed by the dispersing paddles in the mixing paddle group. Back-blowing stage: The back-blowing airflow generated in the container or connected to the container will back-blow the retained material and mix it with the material in the container again.

2. The material mixing method according to claim 1, characterized in that: After the material enters the container, it is first lifted and then dispersed.

3. The material mixing method according to claim 2, characterized in that: The lifting speed of the stirring paddle group is lower than the breaking speed.

4. A dual-drive high-speed mixer suitable for the material mixing method according to claim 1, comprising a frame component (40), characterized in that: A bearing cavity (313) component (30) and a container component (10) located on the top of the bearing cavity (313) component (30) are arranged on the frame component (40); a kettle cover component (20) is added to the mouth of the container component (10); a stirring paddle component (50) is built into the container component (10); The stirring paddle component (50) comprises: The dust-raising paddle (501) is driven by the bearing chamber (313) component (30), The dispersion paddle group is coaxially arranged above the dust raising paddle (501) and is driven by the bearing chamber (313) component (30). The dust raising paddle (501) and the dispersion paddle group have different rotation speeds. The bearing cavity (313) component (30) is used to provide differential power to the stirring paddle component (50).

5. The dual-drive high-mixer according to claim 4, characterized in that: Each group of dispersing blades of the dispersing blade group rotates at the same speed or at a differential speed.

6. The dual-drive high-mixer according to claim 4, characterized in that: The blades of the dust raising paddle (501) and the dispersing paddle group are all arranged obliquely, and the oblique directions are the same.

7. The dual-drive high-mixer according to claim 4, characterized in that: The bearing cavity (313) component (30) includes at least one group of transmission structures with independent output speeds, each group of transmission structures including: a power source mounted on the frame component (40); The main shaft is hollow and connected to the power source with a belt transmission. The rotary joint (301) is connected to the bottom of the main shaft, and a medium flows between the rotary joint and the main shaft.

8. The dual-drive high-mixer according to claim 7, characterized in that: The main shafts of the multiple transmission structures are coaxially sleeved, and the output speed of each transmission structure is output to the corresponding blade at a fixed point.

9. The dual-drive high-speed mixer as claimed in claim 4, characterized in that: A discharge port (113) is provided at the bottom of the container component (10), a discharge plug (116) is provided between the discharge port (113) and the inner cavity of the container component (10), and a cylinder (114) is provided outside the container component (10), and a piston rod of the cylinder (114) pushes the discharge plug (116) to control the on and off of the material output path. The discharge port (113) is provided with at least one back-blowing hole, and the back-blowing hole receives air to back-blow the material.

10. The dual-drive high-mixer according to claim 4, characterized in that: The outer wall of the container component (10) is provided with jackets that act independently of each other, and partitions (102) are provided between adjacent jackets.

Images