Bidirectional spiral feeding device

Abstract

The utility model provides a two-way spiral feeding device which is characterized in that feeding ports are arranged on the upper side face of a material pipe, a discharging port is arranged between the two feeding ports, a spiral shaft penetrates through the material pipe and is connected with two ports of the material pipe through a shaft end sealing piece, and the spiral directions of the discharging port towards the feeding ports at the two ends of the spiral shaft are opposite. The feeding motor is fixed to one end of the material pipe and connected with the spiral shaft. According to the bidirectional spiral feeding device, the design of two inlets and one outlet is adopted, one motor is used for supplying energy to the double-spiral feeder, the occupied space can be reduced, and the cost is saved. Furthermore, a spiral discharge valve is additionally arranged at the feeding hole, so that stable and constant-speed feeding can be realized, and blockage caused by material bridging due to overlarge feeding quantity is prevented; the two ends of the material pipe are sealed in an air-tight mode, and the material pipe has the advantages of being small in leakage amount, small in frictional wear, long in service life, easy to operate, low in maintenance amount and the like, and sealing stability and reliability are obviously improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material conveying and feeding equipment, and particularly relates to a bidirectional screw feeding device. Background Technique

[0002] In the production process of lithium battery powder materials, a screw feeder is usually used to transport the lithium battery powder materials.

[0003] At present, most of the lithium battery material industry uses screw feeders for material steady flow transportation and quantitative control. In the production of lithium battery materials, it is mainly used as a material transportation device for each bin or equipment. When the feeding amount is large, directly connecting the screw feeder to the bin or other equipment easily causes bridging and blockage at the feeding port. And in some cases, two adjacent devices may need to transport and mix materials into the same equipment. At this time, using multiple screw feeders will occupy more space and require multiple feeding and discharging ports. And because some of the transported materials are corrosive, the blades are easily worn due to the dual effects of friction and corrosion, generating metal chips and making the materials impure, increasing the production risk. Content of the Utility Model

[0004] The utility model provides a bidirectional screw feeding device, which can effectively solve the above problems.

[0005] The utility model is realized as follows:

[0006] A bidirectional screw feeding device includes a material pipe, a feeding port, a discharging port, a screw shaft, a shaft end seal and a feeding motor. The feeding port is arranged on the upper side of the material pipe. There are two feeding ports and they are located at both ends of the material pipe. The discharging port is arranged between the two feeding ports. The screw shaft penetrates through the material pipe and is connected to both ends of the material pipe through the shaft end seal. The spiral directions of the spiral blades on the screw shaft from the discharging port to the two feeding ports are opposite. The feeding motor is fixed at one end of the material pipe and is connected to the screw shaft.

[0007] As a further improvement, air supplement filter cartridges are respectively arranged between the feeding port and the discharging port.

[0008] As a further improvement, the air supplement filter cartridges are arranged on the upper side of the material pipe.

[0009] As a further improvement, rotary discharge valves are respectively arranged at the feeding ports.

[0010] As a further improvement, a pneumatic butterfly valve is arranged at the discharging port.

[0011] As a further improvement, the shaft end seal is provided with a spiral lock plate, a sealing ring, a nylon exhaust disc, packing, a skeleton oil seal and a cover plate. The sealing ring is in interference connection with the shaft hole of the spiral lock plate. The nylon exhaust disc, the packing and the skeleton oil seal are stacked in the sealing ring in sequence. The cover plate is fixed to the outer end of the sealing ring. An air vent is arranged on the side surface of the sealing ring and communicated with the nylon exhaust disc.

[0012] As a further improvement, the air supplement filter cartridge is provided with a chuck base, a filter screen, an inner network support and a plug. The filter screen is arranged on the chuck base. The inner network support is arranged inside the filter screen and fixed to the chuck base. An air supplement hole is arranged on the chuck base and communicated with the filter screen. The plug is arranged at the upper ends of the filter screen and the inner network support.

[0013] As a further improvement, the rotary discharge valve is provided with a flange pipe, a sealing shaft, a star-shaped stirring shaft and a feeding motor. A relatively penetrating mounting hole is arranged in the middle of the flange pipe. The sealing shaft is arranged on the mounting hole. The star-shaped stirring shaft is arranged inside the flange pipe and connected with the sealing shafts on both sides. The feeding motor is fixed to the outer side of the flange pipe and connected with the star-shaped stirring shaft.

[0014] As a further improvement, the shaft end seal is provided with a connecting pipe. One end of the connecting pipe is connected with the shaft end seal, and a bearing is arranged at the other end. Both ends of the spiral shaft are connected with the bearing. An inspection port is arranged on the side surface of the connecting pipe.

[0015] As a further improvement, ceramic coatings are arranged on the surface of the spiral shaft and the inner wall of the material pipe.

[0016] The beneficial effects of the present utility model are as follows: The two-way spiral feeding device adopts the design of two feeding ports and one discharging port, and uses two-way spiral blades on a single shaft to feed materials into the same inlet together. Only one motor is needed to supply energy to the spiral feeder, which can reduce the occupied space and save costs. Further, a spiral discharge valve is installed at the feeding port, which can feed materials stably and uniformly, and prevent blockage caused by material bridging due to excessive feeding amount. Gas seals are adopted at both ends of the material pipe, which have the characteristics of less leakage, less friction and wear, long service life, simple operation, significantly improved sealing stability and reliability, and low maintenance amount. The spiral shaft and the material pipe are sprayed with ceramic coatings, making them more wear-resistant and not generating metal chips to pollute the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram provided by an embodiment of a two-way spiral feeding device of the present utility model;

[0019] Figure 2 It is a cross-sectional view provided by an embodiment of a two-way spiral feeding device of the present utility model;

[0020] Figure 3 is Figure 2 a partial structural schematic diagram in;

[0021] Figure 4 It is an internal structural schematic diagram provided by an embodiment of a two-way spiral feeding device of the present utility model;

[0022] Figure 5 It is a schematic structural diagram of a shaft end seal provided by an embodiment of a two-way spiral feeding device of the present utility model;

[0023] Figure 6 It is an exploded view of a shaft end seal provided by an embodiment of a two-way spiral feeding device of the present utility model;

[0024] Figure 7 It is a schematic structural diagram of an air supplement filter cartridge provided by an embodiment of a two-way spiral feeding device of the present utility model;

[0025] Figure 8 It is a schematic structural diagram of a rotary discharge valve provided by an embodiment of a two-way spiral feeding device of the present utility model.

[0026] Reference numerals:

[0027] Material pipe 1; Feed inlet 2; Discharge opening 3; Spiral shaft 4; Spiral blade 41; Shaft end seal 5; Spiral lock plate 51; Sealing ring 52; Nylon exhaust disc 53; Packing 54; Skeleton oil seal 55; Cover plate 56; Vent hole 57; Connecting pipe 58; Maintenance port 581; Bearing 59; Feeding motor 6; Air supplement filter cartridge 7; Chuck base 71; Air supplement hole 711; Filter screen 72; Inner network support 73; Diamond mesh hole 731; Plug 74; Rotary discharge valve 8; Flange pipe 81; Sealing shaft 82; Star-shaped stirring shaft 83; Feed inlet motor 84; Pneumatic butterfly valve 9. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0029] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0030] In the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "middle", "side", "side face", "upper side", "end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0031] Refer to Figures 1-8 As shown, a two-way spiral feeding device includes a material pipe 1, a feeding port 2, a discharging port 3, a spiral shaft 4, a shaft end seal 5, and a feeding motor 6. The feeding port 2 is provided on the upper side face of the material pipe 1. There are two feeding ports 2 and they are located on both ends of the material pipe 1. The discharging port 3 is provided between the two feeding ports 2. The spiral shaft 4 penetrates through the material pipe 1 and is connected to both ends of the material pipe 1 through the shaft end seal 5. The spiral directions of the spiral blades 41 on the spiral shaft 4 at the discharging port 3 towards the two feeding ports 2 are opposite. The feeding motor 6 is fixed to one end of the material pipe 1 and is connected to the spiral shaft 4. The feeding motor 6 is connected with a reducer.

[0032] In order to enable two adjacent devices to mix and convey materials into the same device together, two feeding ports and one discharging port are provided. The middle spiral shaft 4 is provided with two reverse spiral blades 41, so that the motor at one end can drive the spiral shaft 4 to convey the materials from both ends of the feeding ports towards the middle discharging port simultaneously.

[0033] To ensure the sealing performance, shaft end seals 5 are used at both ends to achieve positive pressure sealing, and a closed material pipe 1 is used in the middle.

[0034] Furthermore, air supplement filter cartridges 7 are respectively provided between the feed inlet 2 and the discharge outlet 3.

[0035] Since the production and transportation process of lithium battery materials is basically in a closed form and has good airtightness, the material pipe 1 is prone to material blockage due to air pressure reasons. Adding two air supplement filter cartridges 7 at the upper end of the closed material pipe 1 can play a role in balancing the air pressure and make it not easy to be blocked.

[0036] Furthermore, the air supplement filter cartridge 7 is arranged on the upper side surface of the material pipe 1.

[0037] Furthermore, rotary discharge valves 8 are respectively provided at the feed inlet 2.

[0038] Furthermore, a pneumatic butterfly valve 9 is provided at the discharge outlet 3.

[0039] Furthermore, the shaft end seal 5 is provided with a spiral lock plate 51, a sealing ring 52, a nylon exhaust disc 53, packing 54, a skeleton oil seal 55 and a cover plate 56. The sealing ring 52 is in interference fit with the shaft hole of the spiral lock plate 51. The nylon exhaust disc 53, packing 54 and skeleton oil seal 55 are stacked in the sealing ring 52 in sequence, and the cover plate 56 is fixed to the outer end of the sealing ring 52. A vent hole 57 is provided on the side surface of the sealing ring 52 and is communicated with the nylon exhaust disc 53.

[0040] Shaft end seals 5 are used at both ends to achieve airtight sealing. Compared with most screw feeders on the market that use mechanical seals, airtight sealing has the characteristics of less leakage, less friction and wear, long service life, simple operation, significantly improved sealing stability and reliability, and low maintenance volume.

[0041] Furthermore, the air supplement filter cartridge 7 is provided with a chuck base 71, a filter screen 72, an inner net support 73 and a plug 74. The filter screen 72 is arranged on the chuck base 71. The inner net support 73 is arranged inside the filter screen 72 and is fixed to the chuck base 71. An air supplement hole 711 is provided on the chuck base 71 and is communicated with the filter screen 72. The plug 74 is arranged at the upper ends of the filter screen 72 and the inner net support 73. Circular or diamond-shaped mesh holes 731 are provided on the inner net support 73.

[0042] Since the production and transportation process of lithium battery materials is basically in a closed form, to ensure that the material pipe 1 is not blocked due to air pressure reasons, two air supplement filter cartridges 7 are added at the upper end of the closed material pipe 1 and are arranged at the position between the feed inlet 2 and the discharge outlet, so that it can better balance the air pressure. Its assembly with the material pipe 1 uses a quick-release chuck, which is convenient for cleaning or replacement. The pneumatic butterfly valve 9 below controls the discharging of this device, ensuring that no material leakage occurs during the discharging stop period. It can also prevent external dust from polluting the material and allow ventilation.

[0043] Further, the rotary discharge valve 8 is provided with a flange pipe 81, a sealing shaft 82, a star-shaped stirring shaft 83 and a feeding motor 84. A relatively penetrating mounting hole is provided in the middle of the flange pipe 81. The sealing shaft 82 is arranged on the mounting hole. The star-shaped stirring shaft 83 is arranged in the flange pipe 81 and connected to the sealing shafts 82 on both sides. The feeding motor 84 is fixed on the outer side of the flange pipe 81 and connected to the star-shaped stirring shaft 83.

[0044] When transporting lithium battery materials, in order to prevent the feeding port 2 from bridging and clogging due to excessive feeding volume, a spiral discharge valve is installed at the feeding port 2 to supply materials stably and uniformly and prevent the feeding volume from being too large.

[0045] Further, the shaft end seal 5 is provided with a connecting pipe 58. One end of the connecting pipe 58 is connected to the shaft end seal 5, and the other end is provided with a bearing 59. Both ends of the spiral shaft 4 are connected to the bearing 59. A maintenance port 581 is provided on the side of the connecting pipe 58.

[0046] The connecting pipe 58 not only plays a supporting role, but also facilitates inspection, repair and maintenance, and introduces compressed air to ensure the sealing effect.

[0047] Further, a ceramic coating is provided on the surface of the spiral shaft 4 and the inner wall of the material pipe 1.

[0048] Spraying a ceramic coating on the spiral shaft 4 and the material pipe 1 makes them more wear-resistant and does not generate metal abrasion debris.

[0049] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A two-way spiral feeding device, characterized in that, It includes a material pipe, a feeding port, a discharging port, a spiral shaft, shaft end seals, and a feeding motor. The feeding port is provided on the upper side surface of the material pipe. There are two feeding ports and they are located on both ends of the material pipe. The discharging port is provided between the two feeding ports. The spiral shaft penetrates through the material pipe and is connected to both ends of the material pipe through the shaft end seals. The spiral directions of the spiral blades on the spiral shaft from the discharging port to the two feeding ports are opposite. The feeding motor is fixed to one end of the material pipe and connected to the spiral shaft.

2. The bi-directional spiral feeding device according to claim 1, characterized in that, Air supplement filter cartridges are respectively provided between the feeding port and the discharging port.

3. A two-way spiral feeding device according to claim 2, characterized in that, The air supplement filter cartridges are provided on the upper side surface of the material pipe.

4. A two-way spiral feeding device according to claim 1 or 2, characterized in that, Rotary discharge valves are respectively provided at the feeding ports.

5. A two-way spiral feeding device according to claim 1 or 2, characterized in that, A pneumatic butterfly valve is provided at the discharging port.

6. The two-way spiral feeding device according to claim 1, characterized in that, The shaft end seal is provided with a spiral lock plate, a sealing ring, a nylon exhaust disc, packing, a skeleton oil seal, and a cover plate. The sealing ring is in interference fit with the shaft hole of the spiral lock plate. The nylon exhaust disc, packing, and skeleton oil seal are stacked in sequence inside the sealing ring. The cover plate is fixed to the outer end of the sealing ring. An air vent hole is provided on the side surface of the sealing ring and is communicated with the nylon exhaust disc.

7. A two-way spiral feeding device according to claim 2 or 3, characterized in that, The air supplement filter cartridge is provided with a chuck base, a filter screen, an inner network support, and a plug. The filter screen is provided on the chuck base. The inner network support is provided inside the filter screen and fixed to the chuck base. An air supplement hole is provided on the chuck base and is communicated with the filter screen. The plug is provided at the upper ends of the filter screen and the inner network support.

8. A two-way spiral feeding device according to claim 4, characterized in that, The rotary discharge valve is provided with a flange pipe, a sealing shaft, a star-shaped stirring shaft, and a feeding motor. An installation hole penetrating relatively is provided in the middle of the flange pipe. The sealing shaft is provided on the installation hole. The star-shaped stirring shaft is provided inside the flange pipe and connected to the two side sealing shafts. The feeding motor is fixed to the outer side of the flange pipe and connected to the star-shaped stirring shaft.

9. A two-way spiral feeding device according to claim 1, characterized in that, The shaft end seal is provided with a connecting pipe. One end of the connecting pipe is connected to the shaft end seal and the other end is provided with a bearing. Both ends of the spiral shaft are connected to the bearing. An inspection port is provided on the side surface of the connecting pipe.

10. A two-way spiral feeding device according to claim 1, characterized in that, Ceramic coatings are provided on the surface of the spiral shaft and the inner wall of the material pipe.

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