A bidirectional screw and a spiral mixing mixer composed of the same

Abstract

The utility model discloses a bidirectional screw and a bidirectional spiral mixing mixer composed of the same, including a shaft, which is used to drive the blades on the shaft to rotate; a first breaking and conveying blade group, which is arranged from one end of the shaft to the middle position; the spiral directions of the first breaking and conveying blade group and the second breaking and conveying blade group are opposite; the first breaking and conveying blade group and the second breaking and conveying blade group are used to break and transport powder; the first breaking and conveying blade group and the second breaking and conveying blade group each include at least one first arc blade, a second arc blade and a spiral blade; the first arc blade, the spiral blade and the second arc blade are not connected. When the first arc blade and the second arc blade rotate, the first arc blade and the second arc blade continuously break and crush the powder efficiently, and at the same time push the powder to move toward the middle of the shaft at a lower speed, so as to realize the turning and frying of the powder, so that the powder is less likely to agglomerate.

Description

Technical Field

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

[0002] In the process of stirring and conveying materials, especially powders with poor fluidity or high solid content, caking is prone to occur, resulting in uneven stirring. The Chinese patent with application number "202310227862.7" discloses a spiral mixing and stirring conveying integrated 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 by transmission, the surface of the tube is provided with a feed port and a discharge port connected to the inside 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, and a separation portion is left between the inner side of the spiral blade and the shaft to form an inner channel, and 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 integrated machine is a single spiral blade; under the conveying action of the spiral blade, the powder forms a circulation flow and mixing 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 agglomerated powders, resulting in poor stirring and mixing effects, and it is difficult to completely solve the problem of uneven stirring caused by powder agglomeration. Utility Model Content

[0003] The purpose of the utility model is to provide a bidirectional screw and a bidirectional spiral mixing mixer composed of the same in order to solve the above problems. The blades of the utility model can break up and crush the lumps of powder, and the blades can play a role of conveying, so that the broken and crushed lumps can circulate and mix. The blades of the utility model are composed of blades of various 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 utility model 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 at a position from one end to the middle of the shaft;

[0008] The second breaking and conveying blade group is arranged at the middle position from 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 powder; the first breaking and conveying blade group and the second breaking and conveying blade each include at least one first arc-shaped blade, a second arc-shaped blade and a spiral blade arranged between the first arc-shaped blade and the second arc-shaped blade; the first arc-shaped blade, the spiral blade and the second arc-shaped blade are connected along the axial direction of the shaft, and the first arc-shaped blade, the spiral blade and the second arc-shaped blade are not connected.

[0010] As a preferred solution, the spiral directions of the first breaking and conveying blade group and the second breaking and conveying blade group are opposite, the first breaking and conveying blade group and the second breaking and conveying blade group are separated from the shaft rod, 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 arc-shaped blade and the second arc-shaped 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. An inlet and an outlet are respectively arranged on the upper and lower sides of the cylinder barrel.

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

[0021] The implementation of this utility model has the following beneficial effects:

[0022] 1. The first arc blade and the second arc blade of the utility model are semi-arc blades, which mainly play the role of breaking; at the same time, because the first arc blade is semi-arc, when the shaft rotates, the first arc blade intermittently transports and conveys the powder, that is, the powder is pushed along the axial direction of the shaft to slowly transport, so as to achieve rapid breaking and crushing of the powder, thereby preventing the powder from agglomerating and improving the uniformity of stirring and mixing. When the first arc blade and the second arc blade rotate, the first arc blade and the second arc blade continuously break and crush the powder efficiently, and at the same time push the powder to move toward the middle of the shaft at a lower speed, so as to achieve flipping and stir-frying of the powder, making it less likely to agglomerate.

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

[0024] 3. The utility model 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 structures with different pitches and diameters, 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 utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of a structure in which the distance between two adjacent first arc-shaped blades is equal, and the distance between two adjacent second arc-shaped blades is also equal.

[0027] Figure 2 yes Figure 1 Stereoscopic diagram.

[0028] Figure 3It is a structural schematic diagram in which the distance between two adjacent first arc-shaped blades is unequal, and the distance between two adjacent second arc-shaped blades is also unequal.

[0029] Figure 4 It is a structural schematic diagram in which the distance between two adjacent first arc-shaped blades 1 gradually increases, and the distance between two adjacent second arc-shaped blades gradually increases.

[0030] Figure 5 It is a schematic diagram of a structure in which the distance between two adjacent first arc-shaped blades 1 gradually decreases, and the distance between two adjacent second arc-shaped blades gradually decreases.

[0031] Figure 6 It is a structural schematic diagram in which the diameter of the first arc-shaped blade gradually increases, while the diameter of the second arc-shaped blade remains unchanged.

[0032] Figure 7 It is a structural schematic diagram showing that the diameter of the first arc-shaped blade gradually increases, and the diameter of the second arc-shaped blade gradually increases.

[0033] Figure 8 It is a structural schematic diagram of a spiral mixing mixer composed of a bidirectional screw. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Example

[0036] Reference Figures 2 to 8This embodiment relates to a bidirectional screw, including a shaft 1 for driving 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 powder; the first breaking and conveying blade group 11 and the second breaking and conveying blade group 12 each include at least one first arc-shaped blade 111, a second arc-shaped blade 112 and a spiral blade 113 provided between the first arc-shaped blade 111 and the second arc-shaped blade 112; the first arc-shaped blade 111, the spiral blade 113 and the second arc-shaped blade 112 are connected along the axial direction of the shaft 1, and the first arc-shaped blade 111, the spiral blade 113 and the second arc-shaped 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 1 through a connecting rod 2. The spiral directions of the first breaking and conveying blade set 11 and the second breaking and conveying blade set 12 are opposite, and the first breaking and conveying blade set 11 and the second breaking and conveying blade set 12 are separated from the shaft rod 1, and two extrusion channels with opposite extrusion directions are formed respectively. Specifically, the first breaking and conveying blade set 11 and the second breaking and conveying blade set 12 with opposite spiral directions are separated from the shaft rod 1, and a reverse extrusion channel 21 and a forward extrusion channel 22 are formed respectively.

[0037] 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, and 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 constantly and evenly stirred in the working process of breaking, transporting, mixing and circulating flow.

[0038] The first arc blade 111 and the second arc blade 112 of the present structure are semi-arc blades, which mainly play the role of breaking; at the same time, because the first arc blade 111 is semi-arc, when the shaft 1 rotates, the first arc blade 111 intermittently transports and conveys the powder, that is, the powder is pushed along the axial direction of the shaft 1. During the process of slowly transporting, the powder is quickly broken and crushed, thereby preventing the powder from agglomerating and improving the uniformity of stirring and mixing. When the first arc blade 111 and the second arc blade 112 rotate, the first arc blade 111 and the second arc blade 112 continuously break and crush the powder efficiently, and at the same time push the powder to move toward the middle of the shaft 1 at a lower speed, thereby turning and stir-frying 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 arc blade 111, moves toward the spiral blade 113 at a low speed, and flows to the second arc blade 112 under the transportation action of the spiral blade 113, is broken again under the action of the second arc blade 112, and is squeezed and mixed with each other in the middle of the shaft 1.

[0039] 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.

[0040] It can be known from the above that the first arc-shaped blade 111 and the second arc-shaped blade 112 have various combination structures: Figure 1 It is a structural schematic diagram showing that the distance between two adjacent first arc-shaped blades 111 is equal, and the distance between two adjacent second arc-shaped blades 112 is also equal. Figure 3 It is a schematic diagram of a structure in which the distance between two adjacent first arc-shaped blades 111 is unequal, and the distance between two adjacent second arc-shaped blades 112 is also unequal. Figure 4 It is a structural schematic diagram in which the distance between two adjacent first arc-shaped blades 111 gradually increases, and at the same time, the distance between two adjacent second arc-shaped blades 112 gradually increases. Figure 5 It is a structural schematic diagram in which the distance between two adjacent first arc-shaped blades 111 gradually decreases, and at the same time, the distance between two adjacent second arc-shaped blades 112 gradually decreases.

[0041] Specifically, Figure 1 The first arc-shaped blade 111 and the second arc-shaped blade 112 break the powder evenly and intermittently, and the powder is transported at a uniform speed. Figure 3The first arc blade 111 and the second arc blade 112 break the powder unevenly and intermittently, and the movement speed of the powder is uneven, so that the flow speed of the powder at different positions is different, so that the intensity of the powder breaking and mixing at different positions is different. Figure 4 The first arc-shaped blade 111 and the second arc-shaped blade 112 break the powder unevenly and intermittently. As the distance increases, the transport speed decreases; otherwise, the transport speed increases.

[0042] The diameters of the first arc-shaped blade 111, the spiral blade 113, and the second arc-shaped blade 112 are equal or unequal. When improving the structural relationship between the first arc-shaped blade 111, the spiral blade 113, and the second arc-shaped blade 112, the diameters of the first arc-shaped blade 111 and the second arc-shaped blade 112 can be set to be smaller than the diameter of the spiral blade 113; the diameters of the first arc-shaped blade 111 and the second arc-shaped blade 112 can also be set to be larger than the diameters of the spiral blade 113; of course, the diameter of the first arc-shaped blade 111 can also be set to be larger than the diameters of the spiral blade 113 and the second arc-shaped blade 112; it can be seen that the diameter size relationship between the first arc-shaped blade 111, the spiral blade 113, and the second arc-shaped blade 112 can be set as needed to form a combination of blades with multiple different diameters, thereby achieving different functions and purposes of crushing and transporting powder.

[0043] When there are multiple first arc-shaped blades 111, the diameters of two adjacent first arc-shaped blades 111 are equal or unequal, or gradually increase or decrease. When there are multiple second arc-shaped blades 112, the diameters of two adjacent second arc-shaped blades 112 are equal or unequal, or gradually increase or decrease.

[0044] From the above, we can know that Figure 6 It is a structural schematic diagram in which the diameter of the first arc-shaped blade 111 gradually increases, and the diameter of the second arc-shaped blade 112 remains unchanged; Figure 7 It is a schematic diagram of a structure in which the diameter of the first arc-shaped blade 111 gradually increases, and the diameter of the second arc-shaped blade 112 gradually increases. Figure 6 or Figure 7 In the embodiment, the distance between two adjacent first arc-shaped blades 111 can also be set to be equal or unequal, or gradually increase or decrease. Similarly, the distance between two adjacent second arc-shaped blades 112 can also be set to be equal or unequal, or gradually increase or decrease. Thus, a combination of structures with different pitches and diameters is formed, thereby achieving different functions and purposes of crushing and transporting powder. Figure 6In the process, since the diameter of the first arc-shaped blade 111 gradually increases, when the shaft 1 rotates, the powder in the area of ​​the first arc-shaped blade 111 is driven to form a vortex-shaped powder mixing process, and the powder in this area is continuously transported to the second arc-shaped blade 112 by the spiral blade, and is broken under the action of the second arc-shaped blade 112 and flows along the flow channel to the center position of the shaft 1. Figure 7 In the embodiment, since the diameter of the first arc-shaped blade 111 gradually increases, when the shaft 1 rotates, the powder in the area of ​​the first arc-shaped blade 111 is driven to form a vortex-shaped powder mixing process, and the powder in this area is continuously transported to the second arc-shaped blade 112 by the spiral blade, and is driven by the second arc-shaped blade 112 to form a vortex-shaped powder mixing process and continuously flows to the center of the shaft 1. The whole process is mixed intensely, which improves the uniformity and efficiency of mixing.

[0045] The two second arc-shaped blades 112 located on both sides of the center of the shaft 1 are radially symmetrically staggered at their ends close to each other, and partially overlap axially. In the process of the powders on both sides of the center of the shaft 1 flowing toward the center, the powders are pushed to flow along the symmetrically staggered and partially axially overlapped channels, so that the two streams of powders produce intense positive collision and impact, so that the agglomerated powders can be evenly broken up, and the speed and efficiency of mixing the two can be improved.

[0046] The first arc blade 111 and the second arc blade 112 of the utility model are semi-arc spiral shapes, and the rotation angle of the first arc blade 111 and the second arc 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 a spiral shape, and the rotation angle of the spiral blade 113 can be set to be greater than or equal to 360 degrees.

[0047] This embodiment also provides a spiral mixing mixer composed of a bidirectional screw, such as Figures 1 to 8 As shown, it includes the bidirectional screw and the cylinder 4, the bidirectional screw can be rotatably installed in the cylinder 4, and the bidirectional screw is externally connected to a driving device, which drives the shaft 1 to rotate. The driving device can be an electric motor or a hydraulic motor; Figure 8 The driving device shown in the figure 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 arranged in the middle of the cylinder, and the discharge port 42 is arranged in the middle of the cylinder 4.

[0048] The feed port 41 and the discharge port 42 are respectively provided with a feed switch valve and a discharge switch valve (not shown in the figure).

[0049] A stirring rod 5 is provided on the outer circumference of the shaft 1. The stirring rod 5 is staggered with the first arc blade 111, the spiral blade 113 and the second arc blade 112, and extends to the inner wall close to the cylinder 4. By setting the stirring rod 5 at a position staggered with the first arc blade 111, the spiral blade 113 and the second arc blade 112, the powder in this position can be stirred to improve the uniformity of mixing; and the free end of the stirring rod 5 is set to a position close to the inner wall of the cylinder 4, so that the stirring rod can scrape off the crushed material adhering to the inner wall of the cylinder 4 to prevent the crushed material 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.

[0050] The two ends of the cylinder 4 are respectively provided with a front cover and a rear cover, and the two ends of the shaft rod 1 are rotatably matched with the front cover and the rear cover respectively; the rear 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.

[0051] 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 one end of the first breaking and conveying blade group 11 and the second breaking and conveying blade group 12 located in the middle of the shaft rod 1.

[0052] The bottoms of the first scraper plate 13 and the second scraper plate 14 are connected to the outer wall of the shaft rod 1 through the support rod 15 respectively, and the scraper plates and the support rod 15 are connected to form a T shape; the ends of the scraper plates close to each other are partially overlapped axially.

[0053] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by 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 at a position from one end to the middle of the shaft; The second breaking and conveying blade group is arranged at the middle position from the other end of the shaft; The spiral directions of the first breaking and conveying blade group and the second breaking and conveying blade group are opposite, the first breaking and conveying blade group and the second breaking and conveying blade group are separated from the shaft rod, and two extrusion channels with opposite extrusion directions are formed respectively; The first breaking and conveying blade group and the second breaking and conveying blade group are used to break and transport powder; the first breaking and conveying blade group and the second breaking and conveying blade each include at least one first arc-shaped blade, a second arc-shaped blade and a spiral blade arranged between the first arc-shaped blade and the second arc-shaped blade; the first arc-shaped blade, the spiral blade and the second arc-shaped blade are connected along the axial direction of the shaft, and the first arc-shaped blade, the spiral blade and the second arc-shaped blade are not connected.

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

3. A bidirectional screw according to claim 1, characterized in that: When there are a plurality of second arc-shaped blades, the distance between two adjacent second arc-shaped blades is equal or unequal.

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.

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.

7. A 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 rod have their ends close to each other radially symmetrically staggered and partially overlapped axially.

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

9. A 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 spiral mixer comprising a bidirectional screw according to any one of claims 1 to 9, characterized in that: The screw and the cylinder are rotatably installed in the cylinder, and a feed port and a discharge port are respectively arranged at the upper and lower parts of the middle of the cylinder.

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