Bidirectional leadscrew and spiral mixing blender having same

Abstract

A bidirectional spiral mixing blender having a bidirectional leadscrew, comprising: a shaft configured to drive blades on the shaft to rotate; a first breaking and conveying blade set arranged from one end to the middle of the shaft; and a second breaking and conveying blade set arranged from the other end to the middle of the shaft. The spiral direction of the first breaking and conveying blade set is opposite to that of the second breaking and conveying blade set. The first breaking and conveying blade set and the second breaking and conveying blade set are used for breaking up and conveying powder. The first breaking and conveying blade set and the second breaking and conveying blade set each comprise first arc-shaped blades, second arc-shaped blades, and a spiral blade. The first arc-shaped blades, the spiral blade and the second arc-shaped blades are not connected. When rotating, the first arc-shaped blades and the second arc-shaped blades continuously break up and crush the powder efficiently, while pushing the powder toward the middle of the shaft at a low speed, thereby flipping and stirring the powder to prevent agglomeration.

Description

A bidirectional screw and a spiral mixing mixer composed thereof Technical Field

[0001] The present invention relates to a screw and a mixer formed by the screw, in particular to a bidirectional screw and a bidirectional spiral mixing mixer formed by the screw. Background Art

[0002] When mixing and conveying materials, especially powders with poor fluidity or high solids, caking is prone to occur, leading to uneven mixing. Chinese patent application number "202310227862.7" discloses a spiral mixing and conveying machine, which includes a tube, a rotary drive device and a spiral shaft. The spiral shaft is rotatably arranged in the tube and is connected to the rotary drive device. The surface of the tube is provided with a feed port and a discharge port connected to the interior thereof. The spiral shaft includes a shaft and a spiral blade. The spiral blade is sleeved outside the shaft. The outer side of the spiral blade is close to the inner wall of the tube. A partition is left between the inner side of the spiral blade and the shaft to form an inner channel. An outer spiral channel is formed between the inner channel and the inner wall of the tube, and the outer spiral channel is connected to the inner channel. However, the blade of the conveying machine is a single spiral blade; under the conveying action of the spiral blade, the powder is caused to circulate and mix between the inner channel and the outer spiral channel. When the spiral shaft rotates, the blades mainly play a conveying role and have a poor effect on breaking up the agglomerated powder, resulting in poor stirring and mixing effects, and it is difficult to completely solve the problem of uneven stirring caused by powder agglomeration. Summary of the Invention

[0003] The object of the present invention is to address the above-mentioned problems and provide a bidirectional screw and a bidirectional spiral mixing mixer composed thereof. The blades of the present invention can break up and crush lumps of powder, and the blades can also play a conveying role, so that the broken and crushed lumps circulate and mix. The blades of the present invention are composed of blades of various different structures; the main functions of various blades are different: some are mainly used for conveying, and some are mainly used for breaking and crushing. By conveying and breaking the powder at the same time, the conveying effect is improved and the uniformity of mixing is greatly improved.

[0004] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0005] A bidirectional spiral mixing mixer, comprising

[0006] A shaft, used for driving blades on the shaft to rotate;

[0007] The first breaking and conveying blade group is arranged between one end and the middle of the shaft;

[0008] The second breaking and conveying blade group is located at the middle position of the other end of the shaft;

[0009] The first breaking and conveying blade group and the second breaking and conveying blade group are used to break and transport the powder; the first breaking and conveying blade group and the second breaking and conveying blade each include at least one first curved blade, a second curved blade and a spiral blade arranged between the first curved blade and the second curved blade; the first curved blade, the spiral blade and the second curved blade are connected along the axial direction of the shaft, and the first curved blade, the spiral blade and the second curved blade are not connected.

[0010] As a preferred solution, the spiral directions of the first and second breaking and conveying blade groups are opposite, the first and second breaking and conveying blade groups are separated from the shaft, and two extrusion channels with opposite extrusion directions are formed respectively.

[0011] As a preferred solution, when there are multiple first arc-shaped blades, the distance between two adjacent first arc-shaped blades is equal or unequal, or gradually increases or decreases.

[0012] As a preferred solution, when there are multiple second arc-shaped blades, the distance between two adjacent second arc-shaped blades is equal or unequal, or gradually increases or decreases.

[0013] As a preferred solution, the diameters of the first arc-shaped blade, the spiral blade and the second arc-shaped blade are equal or unequal.

[0014] As a preferred solution, when there are multiple first arc-shaped blades, the diameters of two adjacent first arc-shaped blades are equal or unequal, or gradually increase or decrease.

[0015] As a preferred solution, when there are multiple second arc-shaped blades, the diameters of two adjacent second arc-shaped blades are equal or unequal, or gradually increase or decrease.

[0016] As a preferred solution, the two second arc-shaped blades located on both sides of the center of the shaft are radially symmetrically staggered at their ends close to each other and partially overlap axially.

[0017] As a preferred solution, the rotation angle of the first curved blade and the second curved blade is 120 to 210 degrees.

[0018] As a preferred solution, the rotation angle of the spiral blade is greater than or equal to 360 degrees.

[0019] A bidirectional spiral mixing mixer composed of a bidirectional screw comprises the screw and a cylinder barrel. The screw is rotatably installed in the cylinder barrel. The upper and lower sides of the cylinder barrel are respectively provided with a feed port and a discharge port.

[0020] As a preferred solution, the feed port and the discharge port are respectively provided with a feed switch valve and a discharge switch valve.

[0021] The implementation of the present invention has the following beneficial effects:

[0022] 1. The first curved blade and the second curved blade of the present invention are semi-arc blades, which mainly play the role of breaking. At the same time, because the first curved blade is semi-arc, when the shaft rotates, the first curved blade intermittently transports and conveys the powder, that is, it pushes the powder to be slowly transported along the axial direction of the shaft, thereby quickly breaking and crushing the powder, thereby preventing the powder from agglomerating and improving the uniformity of stirring and mixing. When the first curved blade and the second curved blade rotate, the first curved blade and the second curved blade continuously and efficiently break and crush the powder, while pushing the powder toward the middle of the shaft at a lower speed, thereby turning and stir-frying the powder, making the powder less likely to agglomerate.

[0023] 2. The present invention intermittently crushes the powder at the crushing position through the different structural combination settings of the first curved blade and the second curved blade, and realizes different regional control of the movement speed of the powder, so that the intensity of the crushing and mixing of the powder at different positions is different, thereby achieving different functions and purposes of crushing and transporting the powder.

[0024] 3. The present invention sets the distance between two adjacent first arc-shaped blades to be equal or unequal, or gradually increase or decrease. Similarly, the distance between two adjacent second arc-shaped blades can also be set to be equal or unequal, or gradually increase or decrease; thereby forming a combination of various pitch and diameter size structures, thereby achieving different functions and purposes of crushing and transporting powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0026] FIG1 is a schematic diagram showing a structure in which the distance between two adjacent first curved blades is equal, and the distance between two adjacent second curved blades is also equal.

[0027] FIG. 2 is a perspective view of FIG. 1 .

[0028] FIG3 is a schematic structural diagram showing that the distance between two adjacent first curved blades is unequal, and the distance between two adjacent second curved blades is also unequal.

[0029] FIG4 is a schematic structural diagram showing that the distance between two adjacent first curved blades 1 gradually increases, and the distance between two adjacent second curved blades gradually increases.

[0030] FIG5 is a schematic structural diagram showing that the distance between two adjacent first curved blades 1 gradually decreases, and the distance between two adjacent second curved blades gradually decreases.

[0031] FIG6 is a schematic structural diagram showing that the diameter of the first curved blade gradually increases, while the diameter of the second curved blade remains unchanged.

[0032] FIG7 is a schematic structural diagram showing that the diameter of the first curved blade gradually increases, and the diameter of the second curved blade gradually increases.

[0033] FIG8 is a schematic structural diagram of a spiral mixing mixer composed of a bidirectional screw. DETAILED DESCRIPTION

[0034] 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 creative efforts are within the scope of protection of the present invention. Example

[0035] 2 to 8 , this embodiment relates to a bidirectional screw, comprising a shaft 1 for driving the blades to rotate; a first breaking and conveying blade group 11 provided from one end to the middle of the shaft 1, and a second breaking and conveying blade group 12 provided from the other end to the middle of the shaft 1; the first breaking and conveying blade group 11 and the second breaking and conveying blade group 12 are used to break and transport the powder; the first breaking and conveying blade group 11 and the second breaking and conveying blade group 12 each include at least one first curved blade 111, a second curved blade 112, and a spiral blade 113 provided between the first curved blade 111 and the second curved blade 112; the first curved blade 111, the spiral blade 113, and the second curved blade 112 are connected along the axial direction of the shaft 1, and the first curved blade 111, the spiral blade 113, and the second curved blade 112 are not connected. The first breaking and conveying blade group 11 and the second breaking and conveying blade group 12 are fixedly connected to the shaft via a connecting rod 2. The first and second rupture and conveying blade groups 11 and 12 have opposite spiral directions. The first and second rupture and conveying blade groups 11 and 12 are separated from the shaft 1 and form two extrusion channels with opposite extrusion directions. Specifically, the first and second rupture and conveying blade groups 11 and 12, which have opposite spiral directions, are separated from the shaft 1 and form a reverse extrusion channel 21 and a forward extrusion channel 22, respectively.

[0036] When the shaft 1 rotates, the first breaking and conveying blade group 11 breaks the powder at one end of the shaft 1 and transports it to the middle of the shaft 1. At the same time, the second breaking and conveying blade group 12 breaks the powder at the other end and transports it to the middle of the shaft 1, so that the powders are squeezed and mixed with each other in the middle of the shaft 1. The mixed powders flow in the opposite direction to the end of the shaft 1 through the reverse extrusion channel 21 and the forward extrusion channel 22, thereby forming a circulating flow, so that the powders are continuously and evenly stirred during the working process of breaking, transporting, mixing and circulating flow.

[0037] The first curved blade 111 and the second curved blade 112 of the present structure are semi-arc blades, which mainly play the role of breaking. At the same time, because the first curved blade 111 is semi-arc, when the shaft 1 rotates, the first curved blade 111 intermittently transports and conveys the powder, that is, it pushes the powder to be slowly transported along the axial direction of the shaft 1, thereby achieving rapid breaking and crushing of the powder, thereby preventing the powder from agglomerating and improving the uniformity of stirring and mixing. When the first curved blade 111 and the second curved blade 112 rotate, the first curved blade 111 and the second curved blade 112 continuously and efficiently break and crush the powder, while pushing the powder toward the middle of the shaft 1 at a lower speed, thereby achieving flipping and stir-frying of the powder (similar to the action of cooking), making the powder less likely to agglomerate. The specific working process is as follows: the powder is stir-fried under the breaking action of the first curved blade 111, moves toward the spiral blade 113 at a low speed, and flows to the second curved blade 112 under the transportation action of the spiral blade 113, and is broken again under the action of the second curved blade 112, and is squeezed and mixed with each other in the middle of the shaft 1.

[0038] When there are multiple first curved blades 111, the distance between two adjacent first curved blades 111 is equal or unequal, or gradually increases or decreases. When there are multiple second curved blades 112, the distance between two adjacent second curved blades 112 is equal or unequal, or gradually increases or decreases.

[0039] From the above, it can be known that there are multiple combination structures between the first curved blades 111 and the second curved blades 112: Figure 1 is a structural schematic diagram in which the distance between two adjacent first curved blades 111 is equal, and the distance between two adjacent second curved blades 112 is also equal. Figure 3 is a structural schematic diagram in which the distance between two adjacent first curved blades 111 is not equal, and the distance between two adjacent second curved blades 112 is not equal. Figure 4 is a structural schematic diagram in which the distance between two adjacent first curved blades 111 gradually increases, and the distance between two adjacent second curved blades 112 gradually increases. Figure 5 is a structural schematic diagram in which the distance between two adjacent first curved blades 111 gradually decreases, and the distance between two adjacent second curved blades 112 gradually decreases.

[0040] Specifically, the first curved blade 111 and the second curved blade 112 in Figure 1 crush the powder at a uniform and intermittent location, and the powder is transported at a uniform speed. However, the first curved blade 111 and the second curved blade 112 in Figure 3 crush the powder at an uneven and intermittent location, and the powder's movement speed is uneven, resulting in different flow rates at different locations, and thus different levels of crushing and mixing of the powder at different locations. Furthermore, the first curved blade 111 and the second curved blade 112 in Figure 4 crush the powder at an uneven and intermittent location, and as the distance increases, the transport speed decreases; conversely, the transport speed increases.

[0041] The diameters of the first curved blade 111, the spiral blade 113, and the second curved blade 112 are equal or unequal. When improving the structural relationship between the first curved blade 111, the spiral blade 113, and the second curved blade 112, the diameters of the first curved blade 111 and the second curved blade 112 can be set to be smaller than the diameter of the spiral blade 113; or the diameters of the first curved blade 111 and the second curved blade 112 can be set to be larger than the diameters of the spiral blade 113; of course, the diameter of the first curved blade 111 can also be set to be larger than the diameters of the spiral blade 113 and the second curved blade 112; it can be seen that the diameter size relationship between the first curved blade 111, the spiral blade 113, and the second curved blade 112 can be set as needed to form a combination of blades with different diameters, thereby achieving different functions and purposes of crushing and transporting powder.

[0042] When there are multiple first curved blades 111, the diameters between two adjacent first curved blades 111 are equal or unequal, or gradually increase or decrease. When there are multiple second curved blades 112, the diameters between two adjacent second curved blades 112 are equal or unequal, or gradually increase or decrease.

[0043] As can be seen from the above, Figure 6 is a schematic diagram of a structure in which the diameter of the first curved blade 111 gradually increases, while the diameter of the second curved blade 112 remains unchanged; Figure 7 is a schematic diagram of a structure in which the diameter of the first curved blade 111 gradually increases, while the diameter of the second curved blade 112 gradually increases. Furthermore, in Figures 6 and 7, the distance between two adjacent first curved blades 111 can be set to be equal or unequal, or gradually increase or decrease. Similarly, the distance between two adjacent second curved blades 112 can also be set to be equal or unequal, or gradually increase or decrease. This can form a combination of various pitch and diameter structures, thereby achieving different functions and purposes of crushing and transporting powder. In Figure 6, as the diameter of the first curved blade 111 gradually increases, when the shaft 1 rotates, the powder in the area of ​​the first curved blade 111 is driven to form a vortex-shaped powder mixing process, and the powder in this area is continuously transported by the spiral blade to the second curved blade 112, where it is broken down and flows along the flow channel toward the center of the shaft 1. In Figure 7, as the diameter of the first curved blade 111 gradually increases, when the shaft 1 rotates, the powder in the area of ​​the first curved blade 111 is driven to form a vortex-shaped powder mixing process, and the powder in this area is continuously transported by the spiral blade to the second curved blade 112, where it is driven to form a vortex-shaped powder mixing process and continuously flows toward the center of the shaft 1. The intense mixing throughout the process improves mixing uniformity and efficiency.

[0044] The two second curved blades 112 on either side of the center of the shaft 1 are radially symmetrically staggered at their respective ends, and partially overlap axially. As the powders on either side of the center of the shaft 1 flow toward the center, they are pushed along these symmetrically staggered and partially overlapping channels, causing the two streams of powder to violently collide and impact, evenly breaking up any agglomerated powders and increasing the speed and efficiency of mixing.

[0045] The first curved blade 111 and the second curved blade 112 of the present invention are semi-arc spirals, and the rotation angle of the first curved blade 111 and the second curved blade 112 can be set to 120 to 210 degrees; preferably, the angle is set to 180 degrees. In addition, the spiral blade 113 is spiral, and the rotation angle of the spiral blade 113 can be set to be greater than or equal to 360 degrees.

[0046] This embodiment also provides a spiral mixing mixer composed of a bidirectional screw, as shown in Figures 1 to 8, comprising the bidirectional screw and a cylinder 4. The bidirectional screw is rotatably mounted in the cylinder 4, and the bidirectional screw is externally connected to a drive device, which drives the shaft 1 to rotate. The drive device can be an electric motor or a hydraulic motor; the drive device shown in Figure 8 is a motor 40. The upper and lower sides of the cylinder are respectively provided with a feed port 41 and a discharge port 42. The feed port 41 is provided in the middle of the cylinder, and the discharge port 42 is provided in the middle of the cylinder 4.

[0047] The feed port 41 and the discharge port 42 are respectively provided with a feed on-off valve and a discharge on-off valve (not shown in the figure).

[0048] A stirring rod 5 is provided on the outer circumference of the shaft 1. The stirring rod 5 is staggered with the first curved blade 111, the spiral blade 113, and the second curved blade 112, and extends close to the inner wall of the cylinder 4. By arranging the stirring rod 5 at a position staggered with the first curved blade 111, the spiral blade 113, and the second curved blade 112, the powder in this position can be stirred, thereby improving the uniformity of the mixing; and the free end of the stirring rod 5 is arranged in a position close to the inner wall of the cylinder 4, so that the stirring rod can scrape off the powder adhering to the inner wall of the cylinder 4, thereby preventing the powder from agglomerating on the inner wall. The stirring rod 5 includes a straight rod 51 and a T-shaped rod 52. Among them, the straight rod 51 mainly plays the role of stirring, while the T-shaped rod 52 plays the dual main role of scraping and stirring.

[0049] The two ends of the cylinder 4 are respectively provided with a front end cover and a rear end cover, and the two ends of the shaft rod 1 are respectively rotatably matched with the front end cover and the rear end cover; the rear end cover is detachably connected to the cylinder 4; the cylinder is also provided with a breathing valve and an inspection port, and the inspection port is provided with an inspection cover.

[0050] A first scraper plate 13 and a second scraper plate 14 are respectively provided on the left and right sides of the middle of the shaft rod 1. The first scraper plate 13 and the second scraper plate 14 are evenly distributed around the central ring of the shaft rod 1 and are staggered with the first breaking and conveying blade group 11 and the second breaking and conveying blade group 12 at one end of the middle part of the shaft rod 1.

[0051] The bottoms of the first scraper plate 13 and the second scraper plate 14 are respectively connected to the outer wall of the shaft 1 through a support rod 15, and the scraper plates and the support rod 15 are connected in a T-shape; the ends of the scraper plates that are close to each other partially overlap axially.

[0052] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A bidirectional screw, characterized in that: include A shaft, used for driving blades on the shaft to rotate; The first breaking and conveying blade group is arranged between one end and the middle of the shaft; The second breaking and conveying blade group is located at the middle position of the other end of the shaft; The spiral directions of the first and second breaking and conveying blade groups are opposite to each other. The first and second breaking and conveying blade groups are separated from the shaft and form two extrusion channels with opposite extrusion directions. The first breaking and conveying blade group and the second breaking and conveying blade group are used to break and transport the powder; the first breaking and conveying blade group and the second breaking and conveying blade each include at least one first curved blade, a second curved blade and a spiral blade arranged between the first curved blade and the second curved blade; the first curved blade, the spiral blade and the second curved blade are connected along the axial direction of the shaft, and the first curved blade, the spiral blade and the second curved blade are not connected.

2. A bidirectional screw according to claim 1, characterized in that: When there are multiple first arc-shaped blades, the distance between two adjacent first arc-shaped blades is equal, gradually increases, or gradually decreases.

3. A bidirectional screw according to claim 1, characterized in that: When there are multiple second arc-shaped blades, the distance between two adjacent second arc-shaped blades may be equal or unequal, or gradually increase or decrease.

4. A bidirectional screw according to claim 1, characterized in that: The diameters of the first arc-shaped blade, the spiral blade, and the second arc-shaped blade are equal or unequal.

5. A bidirectional screw according to claim 1, characterized in that: When there are multiple first arc-shaped blades, the diameters of two adjacent first arc-shaped blades are equal or unequal, or gradually increase or decrease.

6. A bidirectional screw according to claim 1, characterized in that: When there are multiple second arc-shaped blades, the diameters of two adjacent second arc-shaped blades are equal or unequal, or gradually increase or decrease.

7. The bidirectional screw according to claim 1, characterized in that: The two second arc-shaped blades located on both sides of the center of the shaft are radially symmetrically staggered at their ends close to each other, and partially overlap axially.

8. The bidirectional screw according to claim 1, characterized in that: The rotation angle of the first curved blade and the second curved blade is 120 to 210 degrees.

9. The bidirectional screw according to claim 1, characterized in that: The rotation angle of the spiral blade is greater than or equal to 360 degrees.

10. A bidirectional screw mixing mixer based on any one of claims 1 to 9, characterized in that: The screw and the cylinder are rotatably mounted in the cylinder, and a feed port and a discharge port are respectively provided at the upper and lower parts of the middle of the cylinder.

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