Lithium battery powder screw conveyor

Abstract

The lithium battery powder screw conveyor comprises a conveying screw shaft and a conveyor shell, the conveying screw shaft comprises a screw core shaft and screw blades which are combined along the axial direction and are connected to the screw core shaft by sleeving, the conveyor shell is combined along the length direction by a plurality of shell segments, the adjacent shell segments are connected by connecting flanges, a sealing device is arranged between the end cover of the conveyor shell and the screw core shaft, an inner hole of a sealing seat body on the sealing device is connected to a ring cavity between the screw core shaft, inner and outer sealing packing rings are arranged in the ring cavity, and an elastic sealing wing ring is embedded in the gas sealing ring, the inner edge of the annular sealing wing on the elastic sealing wing ring is elastically attached to the screw core shaft and is inclined to one end of the inner side sealing packing ring. The lithium battery powder screw conveyor can avoid leakage of the conveyed material through the sealing device of the conveying screw, can ensure reliable isolation of the conveyed material from metal materials in the conveying channel, and has a long service life.

Description

Technical Field

[0001] This invention relates to a conveying device, and more particularly to a screw conveying device for powdery materials. Background Technology

[0002] The conveying of powdery materials requires enclosed conveying equipment to avoid material waste, environmental pollution, or other potential safety accidents caused by dust. Screw conveyors enclose the material within the conveyor casing, meeting the requirement of closed conveying from inlet to outlet. However, the screw shaft of the screw conveyor must rotate relative to the casing, inevitably creating radial clearance where the screw extends beyond the casing. This is the potential point of leakage for the conveyed powdery material. Therefore, a sealing device is needed between the screw and the casing. However, for powdery materials, conventional sealing devices are difficult to maintain reliable sealing and long service life due to the abrasive effect of dust on the sealing elements. For certain special... Certain materials, such as lithium battery powder, must not come into contact with metal materials during transportation to prevent metal ions from contaminating the material and affecting its purity and performance. To meet this requirement, screw conveyors typically coat the surfaces of the conveying blades and inner surfaces of the casing with plastic or other non-metallic materials. However, the lifespan of such a coating is difficult to guarantee, especially for the conveying screw and the inner surface of the casing, where friction with the conveyed material is most severe, making the coating prone to wear or peeling. Furthermore, since these areas are within the enclosed conveyor casing, it is difficult to detect coating wear or peeling. Once coating wear or peeling occurs, exposing the metal substrate, it will cause serious quality issues. Summary of the Invention In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a lithium battery powder screw conveyor that can prevent leakage of the conveyed material through the sealing device of the conveying screw, ensure reliable isolation of the conveyed material from the metal material in the conveying channel, and has a long service life.

[0003] To solve the above-mentioned technical problems, the present invention provides a lithium battery powder screw conveyor, comprising a conveying screw shaft connected to a drive device, a conveyor housing, and a feed port and a discharge port communicating with the inner cavity of the conveyor housing. The conveying screw shaft is rotatably supported on conveying supports at both ends, and the conveyor housing is fixedly supported on the conveying supports by end caps at both ends. The conveying screw shaft includes a screw core and screw blades. The screw blades are composed of several blade segments arranged axially. Each screw pitch L of the screw blade includes at least two blade segments. Each blade segment includes a connecting sleeve and a blade portion, and the blade segment is sleeved and fixedly connected to the screw core shaft through the connecting sleeve. The conveyor housing is composed of several housing segments arranged along the length direction. Each housing segment has connecting flanges at both ends, and adjacent housing segments are connected by connecting flanges. The end caps are connected to the corresponding housing segments by connecting flanges. The discharge port is located at the lower part of the casing section at one end of the conveyor housing. A sealing device is provided between the end cover and the conveying screw shaft. The sealing device includes a sealing seat body, which is fixed to the end cover. At least one inner sealing packing and several outer sealing packings are installed in the annular cavity between the inner hole of the sealing seat body and the screw core of the conveying screw shaft. An air seal ring is provided between the inner and outer sealing packings. An air seal ring groove is provided on the inner wall of the air seal ring. The air seal ring groove is connected to the vent joint hole on the sealing seat body through an air inlet hole on the air seal ring wall. An elastic sealing wing ring is embedded in the air seal ring groove. The elastic sealing wing ring is located on the air seal ring between the end of the inner sealing packing and the air inlet hole. At least one annular sealing wing is provided on the inner wall of the elastic sealing wing ring. The inner edge of the annular sealing wing is elastically fitted with the screw core shaft and obliquely towards the end where the inner sealing packing is located.

[0004] In the above structure, since the conveying spiral shaft includes a spiral mandrel and spiral blades, and the spiral blades are composed of several blade segments assembled axially, each pitch length L of the spiral blade includes at least two blade segments. Each blade segment includes a connecting sleeve and a blade portion. The blade segments are connected to the spiral mandrel through the connecting sleeve. Thus, the entire spiral blade composed of several blade segments assembled axially is made of a non-metallic material with high wear resistance. Each blade segment is made of the same material as a whole, avoiding the problems of coating wear and peeling that exist when coating non-metallic materials on metal spiral blades. This results in reliable use and a long service life. The segmented manufacturing of the spiral blade makes it possible to use a non-metallic material with high wear resistance. The inclusion of at least two blade segments in each pitch length L of the spiral blade makes it easier to form the blade segments during the manufacturing process and maintain a consistent shape. The blade segments are connected to the spiral mandrel through the connecting sleeve. This allows the use of a metal spiral mandrel to ensure the rigidity of the conveying spiral and completely isolates the conveyed material from the metal spiral mandrel, ensuring the performance of the conveying spiral shaft.

[0005] Furthermore, since the conveyor shell is composed of several shell segments combined along its length, with connecting flanges at both ends of each shell segment, adjacent shell segments are connected by these connecting flanges. The end cap is connected to the corresponding shell segment by these connecting flanges. The discharge port is located at the lower part of one shell segment of the conveyor shell. Thus, each shell segment is integrally made of a non-metallic material with high wear resistance. The shell segments are connected by bolts and nuts through the connecting flanges. The connecting bolts will not come into contact with the conveyed material. The conveyor shell formed after connection avoids the problems of coating wear and peeling that exist when coating a non-metallic material onto a metal shell. This ensures the isolation between the conveyed material and the metal material, resulting in reliable use and a long service life.

[0006] Furthermore, a sealing device is provided between the end cover and the conveying screw shaft. This sealing device includes a sealing seat body, which is fixedly connected to the end cover. At least one inner sealing packing and several outer sealing packings are installed in the annular cavity between the inner hole of the sealing seat body and the screw core of the conveying screw shaft. An air seal ring is provided between the inner and outer sealing packings. An air seal ring groove is provided on the inner wall of the air seal ring. The air seal ring groove communicates with the vent joint hole on the sealing seat body through an air inlet hole on the air seal ring wall. An elastic sealing wing ring is embedded in the air seal ring groove. The elastic sealing wing ring is located on the air seal ring and fits against the inner sealing ring. Between one end of the packing and the air inlet, at least one annular sealing wing is provided on the inner wall of the elastic sealing wing ring. The inner edge of the annular sealing wing elastically fits the spiral mandrel and is inclined towards the end where the inner sealing packing is located. Thus, the air seal ring provided between the inner and outer sealing packing in the sealing device can be connected to an external air pressure source. Gas with a certain pressure enters the annular cavity between the air seal ring groove and the spiral mandrel in the conveying spiral shaft, forming a relatively high pressure on the side of the conveyed material in the conveyor housing, preventing the conveyed powdery material from entering through the radial gap between the spiral mandrel and the inner sealing packing. The elastic sealing wing ring, embedded in the air seal ring groove, forms a one-way channel between its left and right sides through an annular sealing wing that elastically fits against the spiral mandrel and is angled inward towards the sealing packing. When the pressure on both sides of the annular sealing wing is equal, the inner ring of the annular sealing wing will adhere to the spiral mandrel due to its elasticity, preventing communication between the left and right sides. Even if the conveyed powdery material enters the area where the elastic sealing wing ring is located from the inner sealing packing, it will not enter the air seal ring groove on the side where the air inlet is located. When the air pressure on the side where the air inlet is located is greater than that on the annular sealing wing... When the pressure on the other side is equalized, the pressure difference will cause the annular sealing wing to overcome its own elasticity and detach from the contact state between it and the spiral mandrel. Gas will enter the other side of the annular sealing wing through the gap between the annular sealing wing and the spiral mandrel until the pressure on both sides of the annular sealing wing is balanced. The inner ring of the annular sealing wing will then re-contact the spiral mandrel. During this process, the powdery material cannot leak outward against the airflow, thus preventing the conveyed powdery material from entering the sealing device and leaking outward. As long as the air seal groove is connected to the air pressure source, it can maintain this good sealing performance, thereby improving the service life of the conveyor sealing device.

[0007] In a preferred embodiment of the present invention, the blade segment is a ceramic component, and each pitch length L of the helical blade includes three to six blade segments, all of which have equal axial length. Using this embodiment, the ceramic component blade segments exhibit excellent wear resistance and rigidity, can be manufactured using mature production processes, and offer superior performance. The helical angle in each blade segment is 120 to 60 degrees, facilitating the manufacturing and shaping of the blade segments. Furthermore, the blade segments can be arranged arbitrarily without needing to follow a specific order during assembly, simplifying manufacturing and assembly.

[0008] In another preferred embodiment of the present invention, the blade segments are fixedly connected to the spiral mandrel via connecting sleeves using connecting screws, with the connecting screws recessed into connecting screw holes on the connecting sleeves. A plug is provided at the opening of the connecting screw hole. With this embodiment, the connection between each blade segment and the spiral mandrel is safe and reliable, and the connecting screws can be isolated from the conveyed material by the plug, ensuring worry-free use.

[0009] In another preferred embodiment of the present invention, the plug is a PTFE product, which is press-fitted into the opening of the connecting screw hole, with its outer surface resting on the outer surface of the connecting sleeve. In this embodiment, the PTFE material is acid and alkali resistant, has a low coefficient of friction, and meets the usage requirements; the connection between the plug and the connecting screw hole is reliable and does not protrude beyond the connecting sleeve; the contact and friction between the conveyed material and the plug will not cause the plug to loosen.

[0010] In a further preferred embodiment of the present invention, the connecting sleeve portion on the blade segment is divided into two parts circumferentially, and each part of the connecting sleeve portion is provided with a connecting screw hole, with the blade portion located on one part of the connecting sleeve portion. This embodiment facilitates the forming of the blade segment, and the two parts of the blade segment can be respectively fixed to the helical mandrel using connecting screws, resulting in a simple structure.

[0011] In another preferred embodiment of the present invention, the conveyor housing is a U-shaped trough. A top cover connecting edge is provided at the opening at the top of the U-shaped trough. A top cover is installed on the conveyor housing via this connecting edge. The feed inlet is located at one end of the top cover, and the feed inlet and discharge inlet are located at opposite ends of the conveyor housing. Using this embodiment, the U-shaped trough conveyor housing is mainly suitable for twin-screw conveyors, which can improve conveying efficiency. The top cover ensures that the open top of the conveyor housing forms a closed conveying space.

[0012] In another preferred embodiment of the present invention, the housing section constituting the U-shaped conveyor shell is a ceramic component, and the upper cover is a metal product. A plastic coating is applied to the inner surface of the upper cover and its feed inlet. With this embodiment, the ceramic component housing section exhibits excellent wear resistance and rigidity, and can be manufactured using mature production processes, resulting in superior performance. The upper cover of the U-shaped conveyor shell has less contact with materials, thus experiencing less friction. The plastic coating on the inner surface of the upper cover effectively isolates the conveyed material from the metal cover, meeting usage requirements and saving costs.

[0013] In a further preferred embodiment of the present invention, the elastic sealing wing ring is a wear-resistant rubber product, and two annular sealing wings are provided on the inner wall of the elastic sealing wing ring. With this embodiment, the wear-resistant rubber product possesses both the required elasticity and a certain degree of wear resistance, meeting the usage requirements of the elastic sealing wing ring. The two annular sealing wings form two unidirectional channels, resulting in a better sealing effect.

[0014] In another further preferred embodiment of the present invention, an outer elastic sealing wing ring is also embedded in the air seal ring groove. This outer elastic sealing wing ring is located between the end of the air seal ring that is fitted with the outer sealing packing and the air inlet. At least one annular sealing wing is provided on the inner wall of the outer elastic sealing wing ring, with the inner edge of the annular sealing wing elastically fitted with the spiral mandrel and inclined towards the end where the inner sealing packing is located. With this embodiment, the inner edge of the annular sealing wing on the inner wall of the outer elastic sealing wing ring, inclined towards the end where the inner sealing packing is located and elastically fitted with the spiral mandrel, will continuously maintain a fitted state with the spiral mandrel under the action of the air pressure in the air seal ring groove. This prevents further leakage of the conveyed powdery material that may have entered the air seal ring groove, adding another layer of protection for the sealed and leak-free conveying of the conveyed powdery material.

[0015] In a further preferred embodiment of the present invention, the outer elastic sealing wing ring is made of wear-resistant rubber, and an annular sealing wing is provided on the inner wall of the outer elastic sealing wing ring. With this embodiment, the wear-resistant rubber product possesses both the required elasticity and a certain degree of wear resistance, meeting the usage requirements of the outer elastic sealing wing ring, and the annular sealing wing ensures that the leakage of powdery materials is prevented. Attached Figure Description

[0016] The lithium battery powder screw conveyor of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of a specific embodiment of the lithium battery powder screw conveyor of the present invention; Figure 2 yes Figure 1 Side view of the structure shown; Figure 3 yes Figure 1 Cross-sectional views of the shell section and the top cover in the structure shown; Figure 4 yes Figure 3 Side view of the middle shell section; Figure 5 yes Figure 1 A schematic diagram of the conveying screw shaft in the structure shown; Figure 6 yes Figure 5 A sectional view of part AA; Figure 7 yes Figure 5 A schematic diagram of the leaf segment in the structure shown; Figure 8 yes Figure 7 The diagram shows a structure in which the connecting sleeve is divided into two parts and then connected to a part of the blade section. Figure 9 yes Figure 1 A schematic diagram of the sealing device in the structure shown; Figure 10 yes Figure 9 A schematic diagram of the gas seal ring and related components in the structure shown; Figure 11 yes Figure 1 A schematic diagram of another embodiment of the sealing device in the structure shown; Figure 12 yes Figure 11 A schematic diagram of the gas seal ring and related components in the structure shown.

[0018] In the diagram: 1-Sealing device, 101-Sealing seat, 102-Inner sealing packing, 103-Air seal ring, 104-Elastic sealing wing ring, 105-Ventilation connector hole, 106-Air inlet, 107-Air seal ring groove, 108-Outer sealing packing, 109-Annular sealing wing, 110-Outer elastic sealing wing ring, 2-End cover, 3-Conveying bracket, 4-Discharge interface, 5-Conveying housing, 51-Housing section, 511-Upper cover connecting edge, 512-Connecting flange, 6-Conveying screw shaft, 61-Screw spindle, 62-Screw blade, 621-Blade section, 6211-Blade part, 6212-Connecting sleeve part, 6213-Connecting screw hole, 63-Plug, 64-Connecting screw, 7-Feeding interface, 8-Drive device, 9-Plastic coating, 10-Upper cover. Detailed Implementation

[0019] exist Figure 1 and Figure 2 In the lithium battery powder screw conveyor shown, the conveyor housing 5 is fixedly supported on the conveyor brackets 3 at both ends by end caps 2 at both ends. The feed port 7 and the discharge port 4 are respectively connected to the inner cavity of the conveyor housing 5. The conveyor housing 5 is a U-shaped trough, and two conveying screw shafts 6 are provided inside the U-shaped trough to form a double screw conveyor. Of course, the conveyor housing 5 can also be cylindrical, and a single screw shaft 6 is provided inside the cylindrical conveyor housing 5 to form a single screw conveyor. The conveyor housing 5 is composed of several housing segments 51 combined along the length direction. Each housing segment 51 has connecting flanges 512 at both ends, and adjacent housing segments 51 are connected by connecting flanges 512. The end caps 2 are connected to the corresponding housing segments 51 by connecting flanges 512. The discharge port 4 is located at the lower part of the housing segment 51 at one end of the conveyor housing 5. See also Figure 3 and Figure 4 A top cover connecting edge 511 is provided at the opening above the U-shaped trough. The top cover 10 is installed on the conveyor housing 5 through the top cover connecting edge 511. The top cover 10 and the U-shaped trough conveyor housing 5 form a closed conveying channel. The feed port 7 is located at the end of the top cover 10 opposite to the discharge port 4. The housing section 51 that constitutes the U-shaped trough conveyor housing 5 is a ceramic component. The top cover 10 is a metal product. A plastic coating 9 is provided on the inner surface of the top cover 10 and the feed port 7. If it is a cylindrical conveyor housing 5, its housing section 51 will also be a ceramic component. Its feed port 7 will be located above the housing section 51 opposite to the discharge port 4. The end cap 10 connected to the housing section 51 is also a metal product with a plastic coating on its inner surface.

[0020] The two ends of the conveying screw shaft 6 pass through corresponding end caps 2 and are rotatably supported on the conveying brackets 3 at both ends by bearings. One end of the conveying screw shaft 6 is connected to the drive device 8 for transmission. Figure 5 and Figure 6 As shown, the conveying screw shaft 6 includes a screw mandrel 61 and screw blades 62. The screw blades 62 are located inside the conveyor housing 5. The two ends of the screw mandrel 61 pass through the corresponding end caps 2. The screw blades 62 are composed of several blade segments 621 arranged axially. Each pitch length L of the screw blade 62 includes at least two blade segments 621, preferably three to six blade segments 621 per pitch length L. The figure shows a four-blade segment 621. The axial length of each blade segment 621 is equal. See [reference needed]. Figure 7 and Figure 8 Each blade segment 621 includes a connecting sleeve 6212 and a blade portion 6211. The blade segment 621 is fixedly connected to the spiral mandrel 61 via the connecting sleeve 6212. The blade segment 621 is preferably a precision ceramic component. A connecting screw hole 6213 is provided on the connecting sleeve 6212. The blade segment 621, fitted onto the spiral mandrel 61, is fixedly connected to the spiral mandrel 61 via the connecting screw hole 6213 on the connecting sleeve 6212 using a connecting screw 64. The connecting screw 64 is recessed within the connecting screw hole 6213 on the connecting sleeve 6212. A plug 63, made of PTFE, is provided at the opening of the connecting screw hole 6213. This plug 63 is press-fitted into the opening of the connecting screw hole 6213, with its outer surface resting on the outer surface of the connecting sleeve 6212. As a preferred embodiment, such as… Figure 7 and Figure 8 As shown, the connecting sleeve 6212 on the blade segment 621 is divided into two parts along the circumference. The two parts of the connecting sleeve 6212 are respectively provided with connecting screw holes 6213 so that the two parts of the connecting sleeve 6212 are respectively installed and fixed to the spiral mandrel 61. The blade part 6211 is located on one part of the connecting sleeve 6212.

[0021] Sealing devices 1 are provided between the end caps 2 and the conveying screw shaft 6, such as Figure 9 As shown, the sealing device 1 includes a sealing seat 101, which is fixedly connected to the corresponding end cap 2. At least one inner sealing packing 102 and several outer sealing packings 108 are installed in the annular cavity between the inner hole of the sealing seat 101 and the spiral mandrel 61 in the conveying spiral shaft 6. The figure shows two inner sealing packings 102 and five outer sealing packings 108 installed. An air seal ring 103 is provided between the inner sealing packings 102 and the outer sealing packings 108. (See Figure 1 for details.) Figure 10 An air seal groove 107 is provided on the inner wall of the air seal ring 103. The air seal groove 107 is connected to the vent hole 105 on the sealing seat 101 through the air inlet hole 106 on the air seal ring wall. An external air source with a certain pressure will enter the air seal groove 107 through the vent hole 105 to achieve the sealing function. An elastic sealing wing ring 104 is embedded in the air seal groove 107. The elastic sealing wing ring 104 is a wear-resistant rubber product. Located between the end of the air seal ring 103 that is attached to the inner sealing packing 102 and the air inlet 106, at least one annular sealing wing 109 is provided on the inner wall of the elastic sealing wing ring 104. Preferably, two annular sealing wings 109 are provided on the inner wall of the elastic sealing wing ring 104. The annular sealing wings 109 are conical rings. The inner edge of the annular sealing wings 109 is elastically attached to the spiral mandrel 61 by its own elasticity and is obliquely directed towards the end where the inner sealing packing 102 is located. Figure 11 and Figure 12 Another embodiment of the sealing device 1 is shown. In addition to the elastic sealing wing ring 104 embedded in the air seal ring groove 107, an outer elastic sealing wing ring 110 is also embedded in the air seal ring groove 107. The outer elastic sealing wing ring 110 is located on the air seal ring 103 between one end of the outer sealing packing 108 and the air inlet 106. At least one annular sealing wing 109 is provided on the inner wall of the outer elastic sealing wing ring 110, preferably one. The inner edge of the annular sealing wing 109 is elastically fitted with the spiral mandrel 61 and obliquely towards the end where the inner sealing packing 102 is located. Like the elastic sealing wing ring 104, the outer elastic sealing wing ring 110 is also made of wear-resistant rubber.

[0022] The above are only some preferred embodiments of the present invention, but the present invention is not limited thereto, and many improvements and modifications can be made. Any improvements and modifications made based on the basic principles of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. A lithium battery powder screw conveyor, comprising a conveying screw shaft (6) connected to a drive device (8), a conveyor housing (5), a feed port (7) and a discharge port (4) communicating with the inner cavity of the conveyor housing (5), wherein the conveying screw shaft (6) is rotatably supported on conveying supports (3) at both ends, and the conveyor housing (5) is fixedly supported on the conveying supports (3) by end caps (2) at both ends, characterized in that: The conveying spiral shaft (6) includes a spiral mandrel (61) and spiral blades (62). The spiral blades (62) are composed of several blade segments (621) arranged axially. Each pitch length L of the spiral blades (62) includes at least two blade segments (621). Each blade segment (621) includes a connecting sleeve (6212) and a blade portion (6211). The blade segment (621) is fixedly connected to the spiral mandrel (61) by the connecting sleeve (6212). The conveyor housing (5) is composed of several housing segments (51). The components are assembled along the length direction. Each housing segment (51) has connecting flanges (512) at both ends. Adjacent housing segments (51) are connected by connecting flanges (512). The end cap (2) is connected to the corresponding housing segment (51) by connecting flanges (512). The discharge port (4) is located at the lower part of the housing segment (51) at one end of the conveyor housing (5). A sealing device (1) is provided between the end cap (2) and the conveying screw shaft (6). The sealing device (1) includes a sealing seat (101). (101) is fixed to the end cap (2). At least one inner sealing packing (102) and several outer sealing packings (108) are installed in the annular cavity between the inner hole of the sealing seat (101) and the spiral mandrel (61) in the conveying spiral shaft (6). An air seal ring (103) is provided between the inner sealing packing (102) and the outer sealing packing (108). An air seal ring groove (107) is provided on the inner wall of the air seal ring (103). The air seal ring groove (107) is connected to the sealing seat through the air inlet hole (106) on the air seal ring wall. The ventilation joint hole (105) on (101) is connected, and an elastic sealing wing ring (104) is embedded in the air seal ring groove (107). The elastic sealing wing ring (104) is located on the air seal ring (103) between one end of the inner sealing packing (102) and the air inlet (106). At least one annular sealing wing (109) is provided on the inner wall of the elastic sealing wing ring (104). The inner edge of the annular sealing wing (109) is elastically fitted with the spiral mandrel (61) and obliquely towards the end where the inner sealing packing (102) is located.

2. The lithium battery powder screw conveyor according to claim 1, characterized in that: The blade segment (621) is a ceramic component. Each pitch length L on the helical blade (62) includes three to six blade segments (621), and the axial length of each blade segment (621) is equal.

3. The lithium battery powder screw conveyor according to claim 1 or 2, characterized in that: The leaf segment (621) is fixedly connected to the spiral mandrel (61) by a connecting screw (64) through the connecting sleeve (6212). The connecting screw (64) is recessed into the connecting screw hole (6213) on the connecting sleeve (6212), and a plug (63) is provided at the opening of the connecting screw hole (6213).

4. The lithium battery powder screw conveyor according to claim 3, characterized in that: The plug (63) is a PTFE product. The plug (63) is press-fitted into the opening of the connecting screw hole (6213), and its outer surface is on the outer surface of the connecting sleeve (6212).

5. The lithium battery powder screw conveyor according to claim 3, characterized in that: The connecting sleeve (6212) on the leaf segment (621) is divided into two parts along the circumference. The two parts of the connecting sleeve (6212) are respectively provided with connecting screw holes (6213). The blade part (6211) is located on one part of the connecting sleeve (6212).

6. The lithium battery powder screw conveyor according to claim 1, characterized in that: The conveyor housing (5) is a U-shaped trough. A top cover connecting edge (511) is provided at the opening above the U-shaped trough. The conveyor housing (5) is fitted with a top cover (10) through the top cover connecting edge (511). The feed port (7) is located at one end of the top cover (10). The feed port (7) and the discharge port (4) are located at both ends of the conveyor housing (5).

7. The lithium battery powder screw conveyor according to claim 6, characterized in that: The housing section (51) constituting the U-shaped conveyor housing (5) is a ceramic component, and the upper cover (10) is a metal product. A plastic coating (9) is provided on the inner side of the upper cover (10) and its upper feed interface (7).

8. The lithium battery powder screw conveyor according to claim 1, characterized in that: The elastic sealing wing ring (104) is a wear-resistant rubber product, and two annular sealing wings (109) are provided on the inner wall of the elastic sealing wing ring (104).

9. The lithium battery powder screw conveyor according to claim 1, characterized in that: An outer elastic sealing wing ring (110) is also embedded in the air seal ring groove (107). The outer elastic sealing wing ring (110) is located on the air seal ring (103) between one end of the outer sealing packing (108) and the air inlet (106). At least one annular sealing wing (109) is provided on the inner wall of the outer elastic sealing wing ring (110). The inner edge of the annular sealing wing (109) is elastically fitted with the spiral mandrel (61) and obliquely towards the end where the inner sealing packing (102) is located.

10. The lithium battery powder screw conveyor according to claim 9, characterized in that: The outer elastic sealing wing ring (110) is a wear-resistant rubber product, and an annular sealing wing (109) is provided on the inner wall of the outer elastic sealing wing ring (110).

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