Spiral conveying device

Abstract

According to the spiral conveying device, a first filter element is directly arranged in a charging barrel, the space in the charging barrel is divided into a first space used for conveying materials and a second space used for negative pressure degassing, gas in the materials can be effectively pumped out while the materials are conveyed, the materials are degassed, and the packaging efficiency is improved. And the degassed materials are compactly conveyed, material overflow in the conveying process is reduced, small packaging bags can be used for packaging the materials with the same mass, and the packaged packaging bags are regular in shape.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging equipment, and particularly relates to a screw conveyor device. Background Art

[0002] Currently, in industries such as chemical engineering, new energy, food and feed, and medicine, during the process of using screw packaging for material products (especially powder products), phenomena such as material leakage and large gas content in the material will occur. This phenomenon is likely to cause environmental pollution; secondly, larger packaging bags are required when packaging the same mass of materials; thirdly, the problem of irregular packaging bag shape appears.

[0003] In the prior art, the following methods are usually used to solve the problems of material flying and large gas content during the use of screw packaging for material products: First, after packaging is completed, a degassing rod is inserted into the packaging bag to separate air from the material. Second, mechanical force extrusion at the top of the bag is used to expel air from the material. The above solutions all have corresponding disadvantages. The disadvantage of the first method is that the degassing effect for large bag packaging is not ideal, which affects the packaging efficiency. The disadvantage of the second method is that some materials (especially powders) will run out during extrusion, which increases additional load requirements for the conveying equipment.

[0004] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of implication that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a screw conveyor device that can overcome the defects in the prior art.

[0006] To achieve the above purpose, the technical solution provided by a specific embodiment of the present utility model is as follows:

[0007] A screw conveyor device includes:

[0008] A material cylinder, which forms an accommodation space therein;

[0009] A first filter element, which is arranged in the accommodation space of the material cylinder and divides the accommodation space into a first space for accommodating materials and a second space for forming negative pressure;

[0010] A first degassing port, which is arranged on the material cylinder on the side where the second space is located;

[0011] A screw conveyor member, which is arranged in the first space and is used for transporting materials.

[0012] In one or more embodiments of the present utility model, the material cylinder is a circular first material cylinder; or

[0013] The cartridge is a U-shaped second cartridge; or

[0014] The cartridge is formed by splicing a circular first cartridge and / or a U-shaped second cartridge.

[0015] In one or more embodiments of the present invention, when the cartridge is a circular first cartridge, or when the cartridge is formed by splicing a circular first cartridge and / or a U-shaped second cartridge, the shape of the first filter element in the first cartridge is circular;

[0016] When the cartridge is a U-shaped second cartridge, or when the cartridge is formed by splicing a circular first cartridge and / or a U-shaped second cartridge, the shape of the first filter element in the second cartridge is U-shaped;

[0017] The first filter element is disposed close to the inner wall of the first cartridge or the second cartridge.

[0018] In one or more embodiments of the present invention, when the cartridge is a U-shaped second cartridge, or when the cartridge is formed by splicing a circular first cartridge and / or a U-shaped second cartridge, the second cartridge includes a first housing arranged in a U shape and first connectors arranged on both sides of the first housing, and the first filter element is fixed between the first connectors.

[0019] In one or more embodiments of the present invention, the first filter element is a non-metallic filter element, the material of the non-metallic filter element includes a polymer material, and the non-metallic filter element has filter holes formed by polymer material particles; and / or

[0020] A non-metallic coating is provided on the inner wall of the cartridge on the side where the first space is located.

[0021] In one or more embodiments of the present invention, a degassing cover plate is provided on the cartridge on the side where the first space is located, and the degassing cover plate includes:

[0022] A first cover plate, which is detachably arranged on the cartridge, a third space is defined between the first cover plate and the cartridge, and a second degassing port communicating with the third space is provided on the first cover plate;

[0023] A second filter element, which is arranged in the third space to filter the gas flowing to the second degassing port.

[0024] In one or more embodiments of the present invention, a chamber is formed by enclosing the inner wall of the first cover plate and the second filter element, and the second degassing port communicates with the chamber.

[0025] In one or more embodiments of the present utility model, the degassing cover plate further includes a second cover plate, which is disposed on the first cover plate and located between the first cover plate and the barrel, and the second cover plate and the first cover plate jointly define the third space.

[0026] In one or more embodiments of the present utility model, a first window is provided on the first cover plate, and the second filter element completely covers the first window.

[0027] In one or more embodiments of the present utility model, a non-metallic coating is provided on the inner wall of the second cover plate on the side where the first space is located.

[0028] In one or more embodiments of the present utility model, the second filter element is a non-metallic filter element, the material of the non-metallic filter element includes a polymer material, and the non-metallic filter element has filter holes formed by polymer material particles.

[0029] Compared with the prior art, the screw conveyor of the present utility model can effectively extract the gas in the material while conveying the material, degas the material, improve the packaging efficiency, convey the degassed material densely, reduce the overflow of the material during the conveying process, and can also use a smaller packaging bag for packaging materials of the same quality, and the shape of the packaging bag after packaging is regular.

[0030] For the screw conveyor of the present utility model, the filter elements (including the first filter element and the second filter element) are made of non-metallic materials, preferably polymer material particles, and the barrel is provided with a non-metallic material coating, which can be applied to the packaging of lithium battery cathode materials, effectively avoid metal contamination of the powder material, and isolate metal foreign objects.

[0031] The screw conveyor of the present utility model has a simple structure, reliable operation, energy conservation and carbon reduction, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Schematic diagram of a screw conveyor in an embodiment of the present utility model;

[0034] Figure 2 Cross-sectional view of the barrel of the screw conveyor in an embodiment of the present utility model;

[0035] Figure 3Cross-sectional view of the barrel of the screw conveyor device in another embodiment of the present utility model;

[0036] Figure 4 Schematic diagram of the degassing cover plate of the screw conveyor device in an embodiment of the present utility model.

[0037] Reference numerals:

[0038] 10 - Barrel; B - Accommodating space; B1 - First space; B2 - Second space; 11 - First degassing port; 12 - Feed port; 121 - Silo; 13 - Discharge port; 131 - Four-way discharge port; 1311 - Movable cover plate; 141 - First housing; 142 - First connecting member; 1421a - Protruding portion; 1421 - Non-metallic connecting portion; 1422 - Support portion; 15 - Degassing cover plate; 151 - First cover plate; 1511 - Second degassing port; 152 - Second filter element; C - Third space; A - Chamber; 153 - Second cover plate; 1531 - First window; 20 - First filter element; 30 - Screw conveyor member; 31 - Screw conveyor shaft; 32 - Screw conveyor blade; 40 - Bearing seat; 50 - Driving motor. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0040] The present application provides a screw conveyor device. By directly arranging a first filter element in the barrel, the space in the barrel is divided into a first space for transporting materials and a second space for negative pressure degassing. While transporting the materials, the gas in the materials can be effectively extracted, the materials are degassed, the packaging efficiency is improved, the degassed materials are densely transported, the overflow of materials during transportation is reduced, smaller packaging bags can be used for packaging materials of the same quality, and the shape of the packaging bags after packaging is regular.

[0041] As Figure 1 shown, the screw conveyor device in an embodiment of the present utility model includes a barrel 10, a first filter element 20 disposed in the barrel 10, and a screw conveyor member 30 disposed in the barrel 10. An accommodating space B is formed in the barrel 10. The first filter element 20 is disposed in the accommodating space B of the barrel 10 and divides the accommodating space B into a first space B1 for accommodating materials and a second space B2 for forming negative pressure. The screw conveyor member 30 is disposed in the first space B1 for transporting materials.

[0042] On the barrel wall of the barrel 10 on the side where the second space B2 is located, a first degassing port 11 directly communicating with the second space B2 is provided. A first degassing pipe is arranged on the first degassing port 11, and the first degassing pipe is communicated with an external negative pressure suction device to form a negative pressure in the second space B2, so as to degas the materials transported in the first space B1.

[0043] In one embodiment, a feed port 12 may be provided on the barrel wall of the barrel 10 on the side where the first space B1 is located. Preferably, the feed port 12 is arranged corresponding to the head end of the screw conveyor 30 in the transport direction. A feed bin 121 may be fixedly arranged on the feed port 12.

[0044] In one embodiment, a discharge port 13 may be provided on the barrel wall of the barrel 10 on the side where the first space B1 is located. Preferably, the discharge port 13 is arranged corresponding to the tail end of the screw conveyor 30 in the transport direction. A multi-way discharge port is fixedly connected to the discharge port 13 through a flange, and preferably a four-way discharge port 131 in this embodiment. Above the four-way discharge port 131 ( Figure 1 shown as an example), a movable cover plate 1311 is used for bolt fastening. When the discharge port 13 is blocked, the movable cover plate 1311 can be opened to clean the inside of the discharge port 13.

[0045] The radial cross-sectional shape of the barrel 10 may be approximately circular or approximately U-shaped, or the barrel 10 is composed of a combination of a part with a circular radial cross-sectional shape and a part with a U-shaped radial cross-sectional shape.

[0046] Reference Figure 2 As shown, in a specific embodiment, the barrel 10 is a first barrel with a radial cross-sectional shape approximately circular. The first filter element 20 is embedded in the first barrel and is arranged close to the inner wall of the first barrel. The radial cross-sectional shape of the first filter element 20 is also circular.

[0047] In this embodiment, the first filter element 20 may be arranged to partially cover the inner wall of the barrel 10. In this case, both the feed port 12 and the discharge port 13 are located on the barrel wall not covered by the first filter element 20. The first degassing port 11 is arranged on the barrel wall covered by the first filter element 20. The gas in the first space B1 can only flow to the second space B2 after being filtered by the first filter element 20.

[0048] Reference Figure 3 As shown, in another specific embodiment, the barrel 10 is a second barrel with a radial cross-sectional shape approximately U-shaped. The radial cross-sectional shape of the first filter element 20 is also U-shaped. The first filter element 20 is arranged close to the inner wall of the second barrel and partially or completely covers the inner wall of the second barrel.

[0049] Exemplarily, the second barrel includes a first housing 141 arranged in a U-shape and first connectors 142 arranged on both sides of the first housing 141. The first connectors 142 can be fixed to the first housing 141 through fasteners such as screws. The first filter element 20 is fixed between the first connectors 142.

[0050] Preferably, the first connector 142 has a protruding portion 1421a protruding from the inner wall of the first housing 141, and the first filter element 20 is fixed on the protruding portion 1421a, and there is still a certain gap between the first filter element 20 and the inner wall of the first housing 141 to form a second space B2. The formation of the second space B2 can better construct a negative pressure chamber, facilitating the degassing treatment of the materials in the first space B1.

[0051] In this embodiment, the two first connectors of the second barrel define a feed port 12, and the discharge port 13 can be opened at any one end of the first housing 141 in the axial direction (depending on the conveying direction of the screw conveyor 30).

[0052] In yet another specific embodiment, the barrel 10 can also be formed by splicing a circular first barrel and / or a U-shaped second barrel. Circular first filter elements are provided in some or all of the first barrels, and U-shaped first filter elements are provided in some or all of the second barrels. The first filter elements are arranged close to the inner walls of the first barrel or the second barrel.

[0053] It can be understood that in the above embodiments, the first barrel and the second barrel can be spliced in any number of combinations or independently to form the barrel 10. In order to enable the materials to be fully degassed in the barrel 10, the feed port 12 is preferably opened on the first barrel or the second barrel at the head end of the material transmission direction, and the discharge port 13 is preferably opened on the first barrel or the second barrel at the tail end of the material transmission direction.

[0054] Refer to Figure 1 and Figure 4 As shown, in order to further improve the degassing efficiency and facilitate the dredging when the interior is blocked with materials, a degassing cover plate 15 for opening the barrel 10 is further provided on the barrel 10 on the side where the first space B1 is located. The degassing cover plate 15 includes a first cover plate 151 and a second filter element 152. The first cover plate 151 is detachably arranged on the barrel 10. The first cover plate 151 and the inner wall of the barrel 10 define a third space C. A second degassing port 1511 communicating with the third space C is provided on the first cover plate 151. A second degassing pipe is provided on the second degassing port 1511. The second filter element 152 is arranged in the third space C to filter the gas flowing towards the second degassing port 1511.

[0055] Similarly, to improve the degassing efficiency, a chamber A is formed by enclosing the inner wall of the first cover plate 151 and the second filter element 152, and the second degassing port 1511 is directly communicated with the chamber A. The formation of the chamber A can better construct a negative pressure chamber, facilitating the degassing treatment of the material in the first space B1. The third space C includes the chamber A.

[0056] The degassing cover plate 15 further includes a second cover plate 153. The second cover plate 153 is disposed on the first cover plate 151 and is located between the first cover plate 151 and the barrel 10. The second cover plate 153 and the first cover plate 151 jointly define the third space C. A first window 1531 is provided on the second cover plate 153, and the second filter element 152 completely covers the first window 1531 to prevent the second space B1 and the chamber A from being directly communicated.

[0057] The setting of the degassing cover plate 15 enables the entire device to quickly clean the material when it is blocked. When the degassing cover plate 15 is used in cooperation with the U-shaped barrel 10, the degassing area can be increased, resulting in a better degassing effect.

[0058] Reference Figure 1 As shown, the screw conveyor 30 includes a screw conveyor shaft 31 and screw conveyor blades 32 provided on the screw conveyor shaft 31. The screw conveyor blades 32 are arranged at equal or variable pitches, preferably at equal pitches, which can prevent the accumulation of materials at the tail end. The screw conveyor 30 is a common structure in the prior art. Since it is not an innovation point of this application, it will not be elaborated in detail here.

[0059] The screw conveyor device of this application further includes a bearing seat 40 and a driving motor 50. The bearing seat 40 is installed at both ends of the barrel 10 through flanges, and bearings are provided inside the bearing seat 40. The driving motor 50 is connected to the screw conveyor 30 and drives it to rotate, so as to uniformly convey the material from the feed port to the discharge port.

[0060] In the screw conveyor device of the present utility model, while the screw conveyor 30 conveys the material towards the discharge port 13, an external negative pressure suction device is connected to the first degassing port 11 and the second degassing port 1511 to construct the second space B2 and the chamber A into a negative pressure chamber, so as to degas the material in the first space B1 and improve the packaging efficiency. The degassed material is densely conveyed, reducing the overflow of the material during the conveying process, and smaller packaging bags can be used for packaging the same mass of materials.

[0061] In one embodiment, in order to make the screw conveyor of the present application applicable to powder materials in the lithium battery industry, in the screw conveyor of this embodiment, both the first filter element 20 and the second filter element 152 are non-metallic filter elements. The material of the non-metallic filter element includes polymer materials, and the non-metallic filter element has filter holes formed by incomplete sintering of polymer material particles. The filter holes on the first filter element 20 and the second filter element 152 are irregular in shape and irregularly distributed due to the incomplete sintering of the polymer material particles, which can effectively degas the material while filtering the material more effectively and delicately, and will not contaminate the material.

[0062] Furthermore, non-metallic coatings are provided on the inner walls of the barrel 10 on the side where the first space B1 is located. A non-metallic coating is also provided on the second cover plate 153 of the degassing cover plate 15. The first connecting member 142 and the second connecting member can also be made of non-metallic materials and are fixedly connected to the first filter element 20 by gluing. Or, as Figure 3 shown, both the first connecting member 142 and the second connecting member can include a non-metallic connecting portion 1421 and a supporting portion 1422 fixed to the non-metallic connecting portion 1421 by screws. The non-metallic connecting portion 1421 is fixedly connected to the first filter element 20 by gluing, and a non-metallic coating is applied on the inner surface of the supporting portion 1422.

[0063] Compared with the prior art, the screw conveyor of the present invention can effectively extract the gas in the material while conveying the material, degas the material, improve the packaging efficiency, densely convey the degassed material, reduce the overflow of the material during the conveying process, and smaller packaging bags can be used for packaging materials of the same quality. After packaging, the shape of the packaging bag is regular.

[0064] For the screw conveyor of the present invention, the filter element (including the first filter element and the second filter element) is made of non-metallic materials, preferably polymer material particles, and the barrel is provided with a non-metallic material coating, which can be applicable to the packaging of lithium battery cathode materials, effectively avoid metal contamination of the powder material, and isolate metal foreign objects.

[0065] The screw conveyor of the present invention has a simple structure, reliable operation, energy saving and carbon reduction, and a wide range of applications.

[0066] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0067] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A screw conveying device, characterized in that: include: A barrel having an accommodating space formed therein; A first filter element is disposed in the accommodating space of the barrel and divides the accommodating space into a first space for accommodating materials and a second space for forming negative pressure; A first degassing port is provided on the barrel at the side where the second space is located; The screw conveyor is arranged in the first space and is used for conveying materials.

2. The screw conveying device according to claim 1, characterized in that: The barrel is a first circular barrel; or The barrel is a U-shaped second barrel; or The barrel is formed by splicing a circular first barrel and / or a U-shaped second barrel.

3. The screw conveying device according to claim 2, characterized in that: When the barrel is a circular first barrel, or the barrel is formed by splicing a circular first barrel and / or a U-shaped second barrel, the shape of the first filter element in the first barrel is circular; When the barrel is a U-shaped second barrel, or the barrel is formed by splicing a circular first barrel and / or a U-shaped second barrel, the shape of the first filter element in the second barrel is U-shaped; The first filter element is arranged close to the inner wall of the first barrel or the second barrel.

4. The screw conveying device according to claim 2, characterized in that: When the barrel is a U-shaped second barrel, or the barrel is formed by splicing a circular first barrel and / or a U-shaped second barrel, the second barrel includes a U-shaped first shell and first connecting parts arranged on both sides of the first shell, and the first filter element is fixed between the first connecting parts.

5. The screw conveying device according to claim 1, characterized in that: The first filter element is a non-metallic filter element, the material of the non-metallic filter element includes a polymer material, and the non-metallic filter element has filter holes formed by polymer material particles; and / or, A non-metallic coating is provided on the inner wall of the barrel at the side where the first space is located.

6. The screw conveying device according to claim 1, characterized in that: A degassing cover plate is provided on the barrel at the side where the first space is located, and the degassing cover plate comprises: a first cover plate, detachably disposed on the barrel, wherein a third space is defined between the first cover plate and the barrel, and a second degassing port communicating with the third space is disposed on the first cover plate; The second filter element is arranged in the third space to filter the gas flowing toward the second degassing port.

7. The screw conveying device according to claim 6, characterized in that: The inner wall of the first cover plate and the second filter element enclose a chamber, and the second degassing port is connected to the chamber.

8. The screw conveying device according to claim 6, characterized in that: The degassing cover plate further includes a second cover plate, which is disposed on the first cover plate and located between the first cover plate and the barrel, and the second cover plate and the first cover plate together define the third space.

9. The screw conveying device according to claim 8, characterized in that: The second cover plate is provided with a non-metallic coating on the inner wall of the side where the first space is located.

10. The screw conveying device according to claim 6, characterized in that: The second filter element is a non-metallic filter element. The material of the non-metallic filter element includes a polymer material. The non-metallic filter element has filter pores formed by polymer material particles.

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