Vacuum raw material mixing device

Abstract

The application discloses a kind of vacuum raw material mixing devices of raw material mixing technical field, including stirring barrel, the bottom of the stirring barrel is provided with discharge part;Activity plate, axial sliding is set in the inner wall of stirring barrel by linear drive assembly, and bottom and stirring barrel form the mixing bin of variable volume;Storage bin, fixedly set in the outer wall of stirring barrel;Feeding part, for controlling the opening and closing of the feeding line of mixing bin;Folding stirring assembly, rotation is set between the bottom of activity plate and stirring barrel, adjusts folding state with activity plate lifting adjustment;Stirring part, rotation is between the bottom of activity plate and stirring barrel, for driving folding stirring assembly rotation, the vacuum degree in mixing bin is adjusted by the lifting of activity plate, realize the relative vacuum inside mixing bin, and when mixing bin inside approaches normal pressure, mixing bin inside can still keep the state of isolation with outside, can reduce the operation difficulty, mixing time and mixing cost of material mixing with aseptic requirement.

Description

Technical Field

[0001] The invention relates to the technical field of raw material mixing, in particular to a vacuum raw material mixing device. Background Art

[0002] Vacuum mixing refers to the process of stirring, degassing, or reacting materials under negative pressure. Through a standardized process of sealing - vacuuming - mixing - breaking the air gap - and discharging, combined with automated control, vacuum mixing devices achieve efficient degassing, anti-oxidation, and uniform mixing. They are primarily used to eliminate bubbles and air gaps, prevent oxidation and deterioration, accelerate volatilization and drying, and meet high purity and sterility requirements.

[0003] In the existing vacuum mechanical mixing method, there is a stirring feature in the mixing chamber. If the stirring feature is located outside the mixing chamber, when the stirring feature is moved to the inside of the mixing chamber, it will face a very difficult sealing problem because the stirring feature is usually irregular. Therefore, in existing equipment, the stirring feature is often set inside the mixing chamber, and the vacuum degree of the mixing chamber is adjusted by a vacuum pump. Figure 12 (The left side is before vacuuming, and the right side is after vacuuming). The vacuuming method requires vacuuming the entire internal space of the mixing chamber. Since the space to be vacuumed is relatively large, it takes a long time to make the vacuum degree in the mixing chamber reach the set value. For batch mixing of materials that require vacuum mixing, especially materials that require multiple mixing of small quantities, this scenario requires frequent and long-term vacuuming by the vacuum pump, and the vacuuming space is large, which not only prolongs the time of the entire mixing process, but also reduces the efficiency of the entire mixing process. For materials with sterility requirements, protective gas needs to be filled into the mixing chamber before unloading, which further reduces the efficiency of the entire mixing process and increases the cost of the mixing process. Summary of the Invention

[0004] The invention provides a vacuum raw material mixing device, which can quickly achieve relative vacuum and restore normal pressure by changing the volume of a sealed mixing bin.

[0005] To achieve the above object, the present invention provides the following technical solution: a vacuum raw material mixing device, comprising a stirring barrel, wherein a discharge portion is provided at the bottom of the stirring barrel;

[0006] Also includes:

[0007] The movable plate is axially slidably arranged on the inner wall of the mixing barrel through a linear drive assembly, and the bottom and the mixing barrel form a mixing chamber with a variable volume;

[0008] The storage bin is fixed on the outer wall of the mixing barrel;

[0009] The feeding part is installed between the storage bin and the movable plate, and is used to control the opening and closing of the feeding pipeline of the mixing bin;

[0010] The folding stirring assembly is rotatably arranged between the bottom of the movable plate and the stirring barrel, and the folding state is adjusted as the movable plate rises and falls;

[0011] The stirring part rotates between the bottom of the movable plate and the stirring barrel, and is used to drive the folding stirring assembly to rotate.

[0012] As a further embodiment of the present invention, the folding stirring assembly includes:

[0013] Slide blocks are arranged in a linear array in the mixing chamber. The slide blocks at the bottom are axially fixed to the mixing barrel. The slide blocks are slidably arranged on the mixing part and are equidistantly distributed. The movable plate drives the top slide blocks up and down, and the drive slide blocks are equidistantly distributed.

[0014] The stirring shaft is slidably arranged with the slider along the axial direction of the stirring shaft, and adjacent stirring shafts are arranged in opposite directions, and the stirring part can drive the stirring shaft and the slider to rotate;

[0015] There are at least two scissor frame groups, the top of which moves along the axial direction of the mixing bin with the movable plate to drive the slider and the stirring shaft to rise and fall; the tops of the two groups of scissor frame groups can move relatively to drive the end of the stirring shaft to swing up and down.

[0016] As a further solution of the present invention, the bottom of one group of the scissor frame groups slides radially relative to the bottom slider, and the top of the other group of scissor frame groups slides radially relative to the top of the stirring part, and a locking part is provided between the stirring part, and the locking part is used to lock the top of one group of the scissor frame groups during mixing; the hinge point of each group of scissor frame groups close to the slider is rotated with the slider, and the middle hinge point is rotated with the stirring shaft, and the adjacent sliders, stirring shafts and the scissor frame groups on both sides are rotated alternately.

[0017] As a further embodiment of the present invention, the stirring unit includes:

[0018] The top plate and the driven wheel are rotatably arranged on the bottom of the movable plate and the bottom of the mixing bin respectively;

[0019] There are at least two drive shafts, the top of which is rotatably arranged with the top plate and the bottom of which passes through the driven wheel, and the drive shafts both slide axially with the slider;

[0020] The driving part is used to drive the driven wheel to rotate.

[0021] As a further solution of the present invention, a lifting wheel is axially slidably provided in the top plate, and the lifting wheel is used to drive the top slider to rise and fall. A lifting key is fixedly provided on the side wall of the lifting wheel. A lifting wheel is fixedly provided on the top of one of the driving shafts, and a rotating wheel is slidably provided on the bottom through the key axis. A closed wave groove is provided on the side wall of the lifting wheel, and the wave groove drives the lifting wheel to rise and fall through the lifting key; a gear ring meshing with the rotating wheel is fixedly provided on the lower surface of the bottom of the mixing barrel.

[0022] As a further solution of the present invention, the feeding part includes a feeding pipe 1 and a feeding pipe 2, and the feeding pipe 1 and the feeding pipe 2 are respectively connected to the storage bin and the mixing bin; a sealing plate is provided between the feeding pipe 1 and the feeding pipe 2 and is axially slidable with the mixing barrel, and the sealing plate is fixed with a magnetic ring, and the magnetic ring can adsorb the movable plate, and the magnetic ring and the mixing barrel are slidably arranged through an elastic sliding component.

[0023] As a further solution of the present invention, the slider at the bottom is fixed with a discharge plate, and the mixing barrel is fixed with a protrusion, which is slidably arranged with the discharge plate, and the protrusion is used to limit the rise of the bottom slider.

[0024] As a further solution of the present invention, a threaded sleeve and a threaded groove that fit together are respectively provided between the stirring shaft and the slider.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the present invention, the volume of the mixing bin in a closed state is changed by lifting and lowering the movable plate to achieve relative vacuum in the mixing bin. Compared with vacuuming by a vacuum pump, the folding stirring component is located inside the mixing bin, reducing the sealing structure. At the same time, the folding stirring component can be displaced to both sides to ensure that the mixing range fills the entire mixing bin. In the initial state, there is only a small amount of gas inside the mixing bin. By moving the movable plate upward, the vacuum degree of most of the volume inside the mixing bin can be adjusted to be extracted, which can achieve relative vacuum inside the mixing bin more quickly, shorten the time of the entire mixing process, and improve the efficiency of the mixing process.

[0027] 2. In the present invention, the resetting process of the movable plate completes the pressure relief work of the mixing chamber, and when the interior of the mixing chamber is close to normal pressure, there is no need to fill in a small amount of protective gas to balance the pressure inside and outside the mixing chamber. The interior of the mixing chamber can still remain isolated from the outside world. Compared with vacuum pumping, it can enter the discharge process faster, and can also reduce the operational difficulty, mixing time and mixing cost of mixing materials with sterility requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0031] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0032] Figure 4 This is a schematic diagram of the partial cross-sectional structure of the stirring portion of the present invention;

[0033] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0034] Figure 6 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0035] Figure 7 This is a schematic diagram of the overall structure of the folding stirring assembly of the present invention;

[0036] Figure 8 The scissor frame and its connection structure of the present invention are schematically shown. Figure 1 ;

[0037] Figure 9 The scissor frame and its connection structure of the present invention are schematically shown. Figure 2 ;

[0038] Figure 10 This is a schematic structural diagram of the foldable stirring assembly of the present invention in an unfolded state;

[0039] Figure 11 This is a schematic structural diagram of the foldable stirring assembly of the present invention in a stored state;

[0040] Figure 12 Schematic diagram of the conventional vacuum type mechanical hybrid vacuum pumping area and before and after comparison of the present invention;

[0041] The figures are as follows: 1. Mixing barrel; 11. Discharging part; 12. Linear drive assembly; 13. Mixing bin; 131. Solid volume bin; 132. Variable volume bin; 14. Storage bin; 2. Movable plate; 3. Feeding part; 31. Feeding pipe 1; 32. Feeding pipe 2; 33. Sealing plate; 34. Magnetic ring; 4. Folding stirring assembly; 41. Slider; 42. Stirring shaft; 43. Scissors frame assembly; 44. Locking piece; 5. Stirring part; 51. Top plate; 52. Driven wheel; 53. Drive shaft; 54. Driving part; 55. Lifting wheel; 56. Lifting key; 57. Lifting wheel; 58. Rotating wheel; 59. Gear ring; 61. Discharging plate; 62. Protrusion. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] See also Figures 1-12 , the present invention provides a technical solution: a vacuum raw material mixing device, comprising a stirring barrel 1, the bottom of the stirring barrel 1 is provided with a discharge portion 11;

[0044] Also includes:

[0045] The movable plate 2 is axially slidably arranged on the inner wall of the mixing barrel 1 through the linear drive component 12, and the bottom and the mixing barrel 1 form a variable volume mixing chamber 13, which includes a solid volume chamber 131 and a variable volume chamber 132; in this embodiment, the linear drive component 12 is a telescopic motor, see Figure 1 and Figure 2 , the linear drive assembly 12 drives the movable plate 2 to rise and fall along the inner wall of the mixing barrel 1 through telescoping. When the movable plate 2 rises, the internal space of the mixing chamber 13 increases, that is, the internal space of the variable-volume chamber 132 increases from nothing and gradually increases as the movable plate 2 rises, and vice versa. Before the movable plate 2 rises, the solid-volume chamber 131 inside the mixing chamber 13 is filled with material, and there is no gas or a small amount of gas, while there is no gas at all inside the variable-volume chamber 132. After the movable plate 2 rises, there is no gas or a small amount of gas in the mixing chamber 13 (a small amount of gas in the solid-volume chamber 131 before the movable plate 2 rises). Compared with vacuum pump evacuation, there is no need to exhaust the entire area of ​​the variable-volume chamber 132, and a relative vacuum can be quickly achieved inside the mixing chamber 13. Compared with vacuum pump evacuation, it can avoid the powder material from flying, causing the material to enter the vacuum pump and causing a workload for the vacuum pump.

[0046] The storage bin 14 is fixed to the outer wall of the mixing barrel 1 and is used to store two or more materials together;

[0047] The feeding part 3 is installed between the storage bin 14 and the movable plate 2, and is used to control the opening and closing of the feeding pipeline of the mixing bin 13. When the movable plate 2 moves to the lower limit of the lifting, the feeding part 3 opens the feeding pipeline connected to the mixing bin 13, and the two or more materials stored in the storage bin 14 enter the mixing bin 13 through the feeding part 3. After the feeding is completed, the feeding pipeline connected to the mixing bin 13 is closed by the feeding part 3, and the mixing bin 13 stops feeding, and the mixing bin 13 is closed. The movable plate 2 is driven to rise by the linear drive component 12, the space in the mixing bin 13 is increased, and the internal pressure of the mixing bin 13 is reduced, thereby achieving relative vacuum in the mixing bin 13. Compared with vacuuming by a vacuum pump, the method of the present invention is faster and more convenient;

[0048] For mixing materials with high vacuum requirements, the mixing chamber 13 can be selectively vacuumed before the movable plate 2 rises;

[0049] The folding stirring assembly 4 is rotatably arranged between the bottom of the movable plate 2 and the stirring barrel 1, and the folding state is adjusted as the movable plate 2 rises and falls;

[0050] The stirring portion 5 rotates between the bottom of the movable plate 2 and the mixing barrel 1 and is used to drive the folding stirring assembly 4 to rotate; when the movable plate 2 rises, the top of the folding stirring assembly 4 moves and unfolds along with the movable plate 2, and the stirring portion 5 drives the folding stirring assembly 4 to rotate around the axis of the mixing chamber 13. The folding stirring assembly 4 in the unfolded state mixes the materials in the mixing chamber 13;

[0051] Specific steps:

[0052] The materials to be mixed are put into the storage bin 14 in proportion, and the materials to be mixed enter the mixing bin 13 through the feeding part 3; after the feeding is completed, the feeding part 3 is closed to seal the mixing bin 13, and the linear drive component 12 drives the movable plate 2 to rise. As the movable plate 2 rises, the space of the variable-volume bin 132 inside the mixing bin 13 increases, and the inside of the mixing bin 13 gradually tends to be vacuum. Until the vacuum degree in the mixing bin 13 reaches the mixing requirement, the movable plate 2 stops rising and maintains the height. At the same time, the top of the folding stirring component 4 rises and unfolds as a whole; during mixing, the stirring part 5 drives the folding stirring component 4 to rotate around the axis of the mixing bin 13, and the folding stirring component 4 stirs and mixes the materials; after the stirring is completed, the movable plate 2 is reset, the internal pressure of the mixing bin 13 is restored, and the mixed materials are discharged from the discharging part 11. The folding stirring component 4 is located inside the mixing bin 13, reducing the sealing structure. At the same time, the folding stirring component 4 can be displaced to both sides to ensure that the mixing range fills the entire mixing bin 13;

[0053] In the present invention, the volume of the mixing chamber 13 in the closed state is changed by lifting the movable plate 2, so as to achieve a relative vacuum in the mixing chamber 13. Compared with the vacuum pump, the foldable stirring assembly 4 is located inside the mixing chamber 13, which reduces the sealing structure. At the same time, the foldable stirring assembly 4 can be folded and stored in the solid volume chamber 131. After unfolding, it can be displaced to both sides and the top can be moved into the variable volume chamber 132 to ensure that the mixing range fills the entire mixing chamber 13. In the initial state, the material in the mixing chamber 13 fills the solid volume chamber 131, and there is no or a small amount of gas stored in the gaps between the solid materials in the solid volume chamber 131. By moving the movable plate 2 upward, the vacuum degree of most of the volume inside the mixing chamber 13 can be adjusted, and the relative vacuum inside the mixing chamber 13 can be achieved more quickly, thereby shortening the time of the entire mixing process and improving the efficiency of the mixing process.

[0054] Since the air pressure in the mixing chamber 13 is relatively low in a vacuum environment, there is a pressure difference with the outside world. Therefore, the pressure inside and outside the mixing chamber 13 needs to be balanced. Only after the pressure inside the mixing chamber 13 is balanced can the material in the mixing chamber 13 be discharged.

[0055] For the mixing of materials that are suitable for mechanical stirring and have aseptic requirements, the vacuum pump vacuuming method requires a large amount of protective gas to be rushed into the mixing chamber 13 to balance the pressure inside and outside the mixing chamber 13 before the internal materials can be discharged; in the present invention, the resetting process of the movable plate 2 completes the pressure relief work of the mixing chamber 13, and when the interior of the mixing chamber 13 is close to normal pressure (before the feed part 3 is opened), no need or a small amount of protective gas is needed to balance the pressure inside and outside the mixing chamber 13, and the interior can still remain isolated from the outside world. Compared with the vacuum pump vacuuming method, the discharge process can be entered faster, and the operational difficulty, mixing time and mixing cost of mixing materials with aseptic requirements can also be reduced.

[0056] As a further embodiment of the present invention, the folding stirring assembly 4 includes:

[0057] The sliders 41 are arranged in a linear array in the mixing chamber 13. The bottom slider 41 is axially fixed to the mixing barrel 1. The sliders 41 are slidably arranged on the mixing part 5 and are evenly spaced. The movable plate 2 drives the top slider 41 to rise and fall, and the driving sliders 41 are evenly spaced.

[0058] The stirring shaft 42 is slidably arranged with the slider 41 along the axial direction of the stirring shaft 42, and adjacent stirring shafts 42 are arranged in opposite directions. The stirring part 5 can drive the stirring shaft 42 and the slider 41 to rotate;

[0059] There are at least two scissor frame groups 43, the tops of which can move axially along the mixing chamber 13 with the movable plate 2, driving the slider 41 and the stirring shaft 42 to rise and fall; the tops of the two scissor frame groups 43 can move relative to each other, driving the end of the stirring shaft 42 to swing up and down;

[0060] For details, see Figure 2 and Figure 7 When the movable plate 2 rises, the top slider 41 rises synchronously, and the top slider 41 drives the remaining sliders 41 and the stirring shaft 42 to slide along the axis of the stirring part 5 through the two sets of scissor frame groups 43, and the sliders 41 and the stirring shaft 42 are equidistantly distributed on the stirring part 5, thereby unfolding the folding stirring assembly 4. In the process of creating a vacuum environment, the folding stirring assembly 4 can be unfolded synchronously, further reducing the time of the entire mixing process and improving the efficiency of the mixing process; and the tops of the two sets of scissor frame groups 43 can be relatively displaced, and the inclination angle of the stirring shaft 42 can be adjusted to increase the stirring area and improve the mixing efficiency.

[0061] As a further solution of the present invention, the bottom of one group of scissor frame groups 43 slides radially relative to the bottom slider 41 and is rotatably arranged with the top slider 41, and the top of the other group of scissor frame groups 43 slides radially relative to the top of the stirring part 5 and is rotatably arranged with the bottom slider 41, and a locking member 44 is provided between the stirring part 5. In this embodiment, the locking member 44 is an electromagnet. When the electromagnet is energized, magnetism is generated, so that the locking member 44 is locked with the stirring part 5, so that the top of one group of scissor frame groups 43 can be locked during mixing; the hinge point of each group of scissor frame groups 43 close to the slider 41 is rotatably arranged with the slider 41, and the middle hinge point is rotatably arranged with the stirring shaft 42, and the adjacent sliders 41, stirring shaft 42 and the scissor frame groups 43 on both sides are rotated alternately;

[0062] For details, see Figure 10 and Figure 11 When the movable plate 2 descends, the two sets of scissor frame groups 43 alternately drive the stirring shafts 42 and the slider 41 at different heights of the stirring shaft 42 to descend, and the stirring shaft 42 moves relative to the slider 41 at the same time. The outer end of the stirring shaft 42 is away from the inner wall of the mixing bin 13, so that when the stirring shaft 42 is folded, it can occupy a smaller space, so that it can enter the material guide area at the bottom of the mixing bin 13 (that is, the conical area at the bottom of the mixing bin 13); on the contrary, the stirring shaft 42 approaches the inner wall of the mixing bin 13, shortening the gap or fit between the stirring shaft 42 and the mixing bin 13. When the stirring shaft 42 rotates around the axis of the mixing bin 13, the stirring area of ​​the stirring shaft 42 can be increased, thereby improving the mixing efficiency. Moreover, by relative movement of the tops of the two sets of scissor frame groups 43, the height difference of the hinge points at the same position of the two sets of scissor frame groups 43 is changed, so that the stirring shaft 42 can be tilted, the stirring area is increased, and the mixing efficiency is improved.

[0063] As a further embodiment of the present invention, the stirring unit 5 includes:

[0064] The top plate 51 and the driven wheel 52 are rotatably disposed on the bottom of the movable plate 2 and the bottom of the mixing chamber 13 respectively;

[0065] There are at least two drive shafts 53, the top of which is rotatably arranged with the top plate 51, and the bottom of which passes through the driven wheel 52, and the drive shafts 53 are axially slidable with the slider 41;

[0066] The driving unit 54 is used to drive the driven wheel 52 to rotate. In this embodiment, the driving unit 54 is composed of a driving motor and a pulley assembly.

[0067] Specifically, the driving part 54 drives the driven wheel 52 to rotate, the driven wheel 52 drives the driving shaft 53 to rotate around the axis of the mixing bin 13, the driving shaft 53 drives the slider 41 to rotate synchronously, and the slider 41 drives the stirring shaft 42 to rotate, thereby achieving material mixing.

[0068] As a further embodiment of the present invention, a lifting wheel 55 is provided in the top plate 51 for axial sliding movement via a key. The lifting wheel 55 is used to drive the top slider 41 to move up and down. A lifting key 56 is fixed to the side wall of the lifting wheel 55. A lifting wheel 57 is fixed to the top of one of the drive shafts 53, and a rotating wheel 58 is provided at the bottom for sliding movement via the key axis. A closed wave groove is provided on the side wall of the lifting wheel 57, and the wave groove drives the lifting wheel 57 to move up and down via the lifting key 56. A gear ring 59 is fixed to the lower surface of the bottom of the mixing barrel 1 and meshes with the rotating wheel 58.

[0069] For details, see Figure 4-Figure 6 When the driving shaft 53 rotates around the axis of the mixing bin 13 with the driven wheel 52, the rotating wheel 58 rotates synchronously under the action of the driving shaft 53. The rotating wheel 58 drives the driving shaft 53 to rotate along its own axis under the action of the gear ring 59. The rotation of the driving shaft 53 can drive the lifting wheel 57 to rotate. The lifting wheel 57 drives the lifting key 56 to move up and down through the closed wave groove. The lifting key 56 drives the lifting wheel 55 fixed to it to rise at the same time. The lifting wheel 55 drives the top slider 41 to rise. The top slider 41 is lifted and lowered by the stirring shaft 42 and the slider 41 hinged to the scissor frame group 43 through the scissor frame group 43, thereby realizing the continuous adjustment of the inclination angle of the stirring shaft 42. Continuously changing the inclination angle of the stirring shaft 42 can enable the materials to be axially mixed, improve the uniformity of mixing, increase the stirring area and improve the mixing efficiency.

[0070] As a further solution of the present invention, the feeding part 3 includes a feeding pipe 1 31 and a feeding pipe 2 32, and the feeding pipe 1 31 and the feeding pipe 2 32 are respectively connected to the storage bin 14 and the mixing bin 13; a sealing plate 33 is provided between the feeding pipe 1 31 and the feeding pipe 2 32, and is axially slidably arranged with the mixing barrel 1, and a magnetic ring 34 is fixed to the sealing plate 33, and the magnetic ring 34 can adsorb the movable plate 2, and the magnetic ring 34 and the mixing barrel 1 are slidably arranged through an elastic sliding component; in this embodiment, the elastic sliding component is a spring, and the magnetic rings 34 at both ends of the spring are connected to the mixing barrel 1; the surface materials of the outer side and the inner side of the magnetic ring 34 are made of magnetic and non-magnetic materials respectively; and the outer ring of the movable plate 2 is also provided with a magnet, such as martensitic stainless steel and austenitic stainless steel;

[0071] For details, see Figure 2 and Figure 3 When the movable plate 2 moves to overlap the magnetic ring 34, the magnetic ring 34 can move up and down with the movable plate 2 to achieve the connection and closure of the feed pipe 1 31 and the feed pipe 2 32. When the movable plate 2 moves to separate the magnetic ring 34, the magnetic ring 34 can be adsorbed on the magnetic outer wall, so that the magnetic ring 34 and the sealing plate 33 remain in a fixed position, avoiding the sealing failure of the mixing chamber 13;

[0072] Also, see Figure 2The bottom of the second feeding pipe 32 is connected to the top of the movable plate 2. When filling the material, the compressed mixing chamber 13 can fill the interior of the mixing chamber 13 with the material, reduce the residual gas inside the mixing chamber 13, and improve the vacuum degree inside the expanded mixing chamber 13.

[0073] As a further solution of the present invention, the bottom slider 41 is fixed with a discharge plate 61, and the mixing barrel 1 is fixed with a protrusion 62, which is slidably arranged with the discharge plate 61, and the protrusion 62 is used to limit the rise of the bottom slider 41;

[0074] Specifically, the discharge plate 61 can mix the materials at the bottom of the mixing bin 13, and when discharging, the rotation of the discharge plate 61 can accelerate the discharging.

[0075] As a further solution of the present invention, mutually fitting screw sleeves and screw grooves are provided between the stirring shaft 42 and the slider 41;

[0076] Specifically, when the stirring shaft 42 moves relative to the slider 41, the stirring shaft 42 can rotate relative to the slider 41. When the movable plate 2 descends, the rotation of the stirring shaft 42 can push the accumulated materials into the bottom of the mixing bin 13, reducing the obstruction of the materials to the stirring shaft 42 and avoiding the inability of the stirring shaft 42 to reset.

Claims

1. A vacuum raw material mixing device, comprising a stirring barrel (1), characterized in that: The bottom of the mixing barrel (1) is provided with a discharge portion (11); Also includes: The movable plate (2) is axially slidably arranged on the inner wall of the mixing barrel (1) through a linear drive assembly (12), and the bottom and the mixing barrel (1) form a mixing chamber (13) with a variable volume; A storage bin (14) is fixedly mounted on the outer wall of the mixing barrel (1); The feeding part (3) is installed between the storage bin (14) and the movable plate (2) and is used to control the opening and closing of the feeding pipeline of the mixing bin (13); A folding stirring assembly (4) is rotatably arranged between the bottom of the movable plate (2) and the stirring barrel (1), and the folding state is adjusted as the movable plate (2) rises and falls; The folding stirring assembly (4) comprises: Slide blocks (41) are arranged in a linear array in the mixing chamber (13), the slide blocks (41) at the bottom are axially fixed to the mixing barrel (1), the slide blocks (41) are slidably arranged on the mixing portion (5) and are equidistantly distributed, and the movable plate (2) drives the top slide blocks (41) to rise and fall, driving the slide blocks (41) to be equidistantly distributed; A stirring shaft (42) is slidably arranged with the slider (41) along the axial direction of the stirring shaft (42), and adjacent stirring shafts (42) are arranged in opposite directions, and the stirring portion (5) is capable of driving the stirring shaft (42) and the slider (41) to rotate; There are at least two scissor frame assemblies (43), the tops of which move along the axial direction of the mixing chamber (13) with the movable plate (2), driving the slider (41) and the stirring shaft (42) to rise and fall; the tops of the two scissor frame assemblies (43) can move relative to each other, driving the end of the stirring shaft (42) to swing up and down; The stirring portion (5) rotates between the bottom of the movable plate (2) and the stirring barrel (1) and is used to drive the folding stirring assembly (4) to rotate; The stirring part (5) comprises: The top plate (51) and the driven wheel (52) are rotatably arranged on the bottom of the movable plate (2) and the bottom of the mixing chamber (13), respectively; There are at least two drive shafts (53), the top of which is rotatably arranged with the top plate (51) and the bottom of which passes through the driven wheel (52), and the drive shafts (53) are axially slidable with the slider (41); A driving portion (54) for driving the driven wheel (52) to rotate; A lifting wheel (55) is axially slidably provided in the top plate (51), and the lifting wheel (55) is used to drive the top slider (41) to rise and fall. A lifting key (56) is fixedly provided on the side wall of the lifting wheel (55). A lifting wheel (57) is fixedly provided on the top of one of the drive shafts (53), and a self-rotating wheel (58) is slidably provided on the bottom through the key axis. A closed wave groove is provided on the side wall of the lifting wheel (57), and the wave groove drives the lifting wheel (57) to rise and fall through the lifting key (56). A gear ring (59) is fixedly provided on the lower surface of the bottom of the mixing barrel (1) and is engaged with the self-rotating wheel (58).

2. A vacuum raw material mixing device according to claim 1, characterized in that: The bottom of one group of the scissor frame groups (43) slides radially relative to the bottom slider (41), and the top of the other group of the scissor frame groups (43) slides radially relative to the top of the stirring part (5), and a locking member (44) is provided between the stirring part (5), and the locking member (44) is used to lock the top of one group of the scissor frame groups (43) during mixing; the hinge point of each group of the scissor frame groups (43) close to the slider (41) is rotatably arranged with the slider (41), and the middle hinge point is rotatably arranged with the stirring shaft (42), and the adjacent sliders (41), the stirring shaft (42) and the scissor frame groups (43) on both sides are alternately rotatably arranged.

3. The vacuum raw material mixing device according to claim 1, characterized in that: The feeding part (3) includes a feeding pipe 1 (31) and a feeding pipe 2 (32), and the feeding pipe 1 (31) and the feeding pipe 2 (32) are respectively connected to the storage bin (14) and the mixing bin (13); a sealing plate (33) is provided between the feeding pipe 1 (31) and the feeding pipe 2 (32) and is axially slidably arranged with the mixing barrel (1), and the sealing plate (33) is fixed with a magnetic ring (34), and the magnetic ring (34) can adsorb the movable plate (2), and the magnetic ring (34) and the mixing barrel (1) are slidably arranged through an elastic sliding component.

4. The vacuum raw material mixing device according to claim 1, characterized in that: The slider (41) at the bottom is fixedly provided with a discharge plate (61), and the mixing barrel (1) is fixedly provided with a protrusion (62). The protrusion (62) and the discharge plate (61) are slidably arranged, and the protrusion (62) is used to limit the rise of the bottom slider (41).

5. The vacuum raw material mixing device according to claim 1, characterized in that: A threaded sleeve and a threaded groove that fit together are respectively provided between the stirring shaft (42) and the slider (41).

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