Automatic screening type screw feeder

Abstract

The utility model relates to the technical field of material screening, and discloses an automatic material screening type screw feeder which comprises a material screening barrel and a screw rod, the screw rod and the material screening barrel are coaxially arranged, the screw rod is a long rod, a spiral protrusion is arranged on the side face of the screw rod, and raw materials needing to be screened can be conveyed downwards through the protrusion on the screw rod. The material screening barrel and the screw rod are driven by a motor to rotate, at least two annular material screening discs with high peripheries and low middles are arranged on the inner wall of the material screening barrel, the inner sides of the material screening discs are attached to the outer sides of the spiral protrusions of the screw rod, a material screening opening is formed in the connecting position of the material screening barrel and the material screening discs, and a discharging opening is formed in the lower portion of the material screening barrel. Raw materials falling into the material screening barrel move upwards along the material screening disc through centrifugal force generated by rotation of the material screening barrel and the screw rod, so that light-weight materials are sent out from the material screening opening, and heavy-weight materials are retained at the position of the axis screw rod, are conveyed downwards through the screw rod and are conveyed out from the discharging opening.

Description

Technical Field

[0001] The utility model relates to the technical field of material screening, in particular to an automatic screening type spiral feeder. Background Art

[0002] The main raw materials of aerated concrete blocks include siliceous materials (such as sand, fly ash and silicon-containing tailings, etc.) and calcareous materials (such as lime and cement). In addition, other materials such as gas-generating agents (such as aluminum powder), gypsum, slag, etc. are also needed. In the production process of aerated concrete blocks, the screening of raw materials is an important link to ensure the quality of the raw materials and the uniformity of the mixing. Usually, siliceous materials and calcareous materials, such as sand, fly ash, lime and cement, need to be screened by a feeder. The main purpose of screening is to remove impurities in the raw materials and ensure the purity of the raw materials and the uniformity of the particle size. For example, sand needs to be free of impurities, and the content of calcium carbonate (such as coral, shell, etc.) needs to be controlled within a certain range. In the production process of aerated concrete blocks, the volume weight of the raw materials has a significant impact on the mixing ratio, slurry consistency and the final performance of the product. Therefore, correctly measuring and controlling the volume weight of various raw materials is one of the key steps to ensure stable product quality.

[0003] Conventional screening devices can only screen particles of a single volume. If there are many types of particles in the raw materials, multiple screenings are required, and particles may remain in the screen, causing blockage and reducing the screening efficiency, increasing the overall screening manufacturing time, and some particles may have the same volume, resulting in incomplete screening and the presence of impurities mixed in. Utility Model Content

[0004] (I) Technical problems solved: In view of the deficiencies of the prior art, the utility model provides an automatic screening screw feeder, which has the advantages of continuous and accurate screening and solves the problem of low screening efficiency.

[0005] (ii) Technical solution: In order to achieve the above-mentioned purpose of continuous and precise screening, the utility model provides the following technical solution: an automatic screening screw feeder, comprising a screening drum and a screw rod, the screw rod and the screening drum are coaxially arranged, the screw rod is a long rod with a spiral protrusion on the side, and the raw materials to be screened can be transported downward through the protrusion on the screw rod, the screening drum and the screw rod are driven to rotate by a motor, and an annular screening disc with high sides and low middle is provided on the inner wall of the screening drum, and at least two are provided, the inner side of the screening disc is fitted with the outer side of the spiral protrusion of the screw rod, a screening port is provided at the connection between the screening drum and the screening disc, and a discharge port is provided at the bottom, the raw materials falling into the screening drum are subjected to the centrifugal force generated by the rotation of the screening drum and the screw rod, so that the small weight materials move upward along the screening disc and are discharged from the screening port, and the large weight materials are retained at the axial screw rod, and are transported downward by the screw rod and discharged from the discharge port.

[0006] Preferably, a collecting tray is provided on the outside of the screening cylinder, and after the screened material is sent out from the screening port, it falls into the collecting tray for collection and is then transported by a conveyor belt.

[0007] Preferably, a screening cylinder cover is provided above the screening cylinder to seal the screening cylinder during the screening process to avoid raising dust.

[0008] Preferably, the screen plates have different inclinations, with the inclination of the screen plates on the upper layer being greater than that of the screen plates on the lower layer. The screen plates on the lower layers are more parallel, so that they can screen out particles with larger volume and weight. The multi-layer design makes the screening process more detailed and precise, and each layer of screen plates can screen out particles of a specific volume and weight, thereby realizing multi-stage screening of raw materials.

[0009] Preferably, the screen disc is provided with concave patterns which radiate toward the edge along the axis rotation. The design of the concave patterns makes it easier for the raw material particles to be affected by the centrifugal force and move toward the edge of the screen disc along the pattern direction when the screen disc rotates. This design effectively promotes the separation of particles, so that light particles can be discharged through the screen port more quickly, while heavy particles can stay more smoothly in the center area of ​​the screen disc or be transported to the next layer for further screening. Therefore, the concave patterns significantly improve the screening efficiency and reduce the screening time.

[0010] (III) Beneficial effects: Compared with the prior art, the utility model provides an automatic screening screw feeder, which has the following beneficial effects:

[0011] 1. The automatic screening screw feeder, driven by a motor, works with the screening barrel and the screw rod, which not only realizes the continuous screening of raw materials, but also ensures the stability and continuity of the screening process. The existence of the screw rod enables the raw materials to move in an orderly manner during the screening process, avoiding blockage and accumulation. Through the setting of the screening plate, the center part is lower and the surrounding parts gradually rise to form an inclined plane. This design allows the raw materials to gradually move outward along the inclined plane under the action of centrifugal force. The principle of centrifugal force is used to enable small and light particles to be quickly discharged through the screening port, while heavier particles stay at the axis due to their own weight and are then transported to the next layer for further screening. This design greatly improves the screening efficiency and accuracy. The multi-layer design is adopted, and the screen of each layer The inclination of the material trays is different. The lower the screen trays are, the more parallel they tend to be. The multi-layer design makes the screening process more delicate and precise. Each layer of the screen trays can screen out particles of a specific volume and weight, thereby realizing multi-stage screening of raw materials. The lower the screen trays are, the more parallel they are, which helps to screen out particles with larger volume and weight. This design not only improves the screening accuracy, but also makes the screening process more flexible and controllable. The screening port is located on the side of the screening barrel to discharge the light particles after screening; the discharge port is located at the bottom or side of the screening barrel to discharge the heavy particles that cannot be discharged from the screening port. Through the reasonable design of the screening port and the discharge port, the screened particles can be discharged in an orderly manner to avoid mixing and cross-contamination. At the same time, this design also makes the screening process more efficient and convenient.

[0012] 2. The automatic screening screw feeder, through the use of screening drum and collecting plate, screens the raw materials with different particle sizes, and divides them into components of different particle sizes according to the different sizes of the materials. This helps to remove impurities and foreign matter in the raw materials and improve the purity and quality of the raw materials. Aerated concrete blocks have high requirements for the purity of raw materials. The screening process can ensure that only particles that meet the requirements enter the production process, thereby improving the overall quality of the product. The screening process helps to control the particle size of the raw materials. Aerated concrete blocks require raw materials to have a certain particle distribution to ensure that the ideal uniformity and strength can be achieved during the mixing, stirring and molding process. The screening machine can accurately adjust the particle size so that the raw materials are more in line with production requirements. Screening can also improve the utilization rate of raw materials. By removing oversized or undersized particles, the raw materials can better adapt to the processing capacity of production equipment and reduce waste and loss. At the same time, for some raw materials with special requirements, such as calcium materials or silicon materials that require specific particle sizes, screening can ensure that the raw materials meet production requirements, thereby improving product performance and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0015] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 4 This is a schematic diagram of the screen plate texture of the utility model.

[0017] In the figure: 1, screening barrel; 11, spiral rod; 12, screening barrel cover; 101, collecting tray; 102, discharge port; 111, screening tray; 112, screening port. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 2 The automatic screening screw feeder comprises a screening drum 1 and a screw rod 11, wherein the screw rod 11 and the screening drum 1 are coaxially arranged, wherein the screw rod 11 is a long rod with a spiral protrusion on the side, and the raw materials to be screened can be transported downward through the protrusion on the screw rod 11, wherein the screening drum 1 and the screw rod 11 are driven to rotate by a motor, wherein an annular screening plate 111 with a high periphery and a low middle is arranged on the inner wall of the screening drum 1, and at least two of them are arranged, wherein the inner side of the screening plate 111 is fitted with the outer side of the spiral protrusion of the screw rod 11, wherein a screening port 112 is arranged at the connection between the screening drum 1 and the screening plate 111, and a discharge port 102 is arranged at the bottom. The raw materials falling into the screening drum 1 are subjected to the centrifugal force generated by the rotation of the screening drum 1 and the screw rod 11, so that the small weight materials move upward along the screening plate 111 and are sent out from the screening port 112, and the large weight materials are retained at the axial screw rod 11, and are transported downward by the screw rod 11 and transported out from the discharge port 102. The materials are divided into components of different particle sizes according to their different sizes, which helps to remove impurities and foreign matter in the raw materials and improve the purity and quality of the raw materials. Aerated concrete blocks have high requirements on the purity of raw materials. The screening process can ensure that only particles that meet the requirements enter the production process, thereby improving the overall quality of the product.

[0020] Furthermore, the screen plates 111 have different inclinations. The inclination of the screen plates 111 on the upper layer is greater than that of the screen plates 111 on the lower layer. The screen plates 111 on the lower layers are more parallel, so that they can screen out particles with larger volume and weight. The multi-layer design makes the screening process more delicate and precise. Each layer of the screen plates 111 can screen out particles of a specific volume and weight, thereby realizing multi-stage screening of raw materials.

[0021] See also Figure 3 A collecting tray 101 is disposed on the outside of the screening drum 1. After the screened materials are sent out from the screening port 112, they fall into the collecting tray 101 for collection and are then transported by a conveyor belt.

[0022] A screening cylinder cover 12 is provided above the screening cylinder 1 to seal the screening cylinder 1 during the screening process to prevent dust from being raised.

[0023] See also Figure 4 The screen disc 111 is provided with concave patterns that radiate toward the edge along the axis rotation. The design of the concave patterns makes it easier for the raw material particles to be affected by the centrifugal force when the screen disc 111 rotates, and moves toward the edge of the screen disc 111 along the pattern direction. This design effectively promotes the separation of particles, so that light particles can be discharged through the screen port 112 more quickly, while heavy particles can stay more smoothly in the center area of ​​the screen disc 111 or be transported to the next layer for further screening. Therefore, the concave patterns significantly improve the screening efficiency and reduce the screening time. Due to the guiding effect of the concave patterns, the raw material particles can flow more smoothly during the screening process, reducing the friction and collision between the particles. This not only reduces the energy consumption during the screening process, but also reduces the wear and failure rate of the equipment, and extends the service life of the equipment.

[0024] Working principle: The motor drives the screening barrel 1 and the screw rod 11 to rotate, and the raw materials to be screened are poured into the barrel. The screw rod 11 is located at the axis of the screening barrel 1, and a ring-shaped screening plate 111 with a low center and high surroundings is arranged between the screw rod 11 and the inner wall of the side of the screening barrel 1. The raw materials falling into the screening barrel 1 generate centrifugal force through the rotation of the screening barrel 1. The small and light particles will gradually move outward along the inclined surface of the screening plate 111 and be transported out of the screening barrel 1 through the screening port 112. The heavier particles stay at the axis due to their own weight and the limitation of the inclined screening plate 111, and are transported to the next layer by the screw rod 11. The inclination of the screening plate 111 on each layer is different. The lower the layer, the heavier the particles. The screening discs 111 are more parallel, so that they can screen out particles of larger volume and weight. The multi-layer design makes the screening process more delicate and precise. Each layer of the screening discs 111 can screen out particles of specific volume and weight, thereby realizing multi-stage screening of raw materials. Finally, the particles that cannot be transported out from the screening port 112 are transported out from the discharge port 102, and are divided into components of different particle sizes according to the different sizes of the materials. This helps to remove impurities and foreign matter in the raw materials and improve the purity and quality of the raw materials. Aerated concrete blocks have high requirements on the purity of raw materials. The screening process can ensure that only particles that meet the requirements enter the production process, thereby improving the overall quality of the product.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic screening screw feeder, comprising a screening cylinder (1) and a screw rod (11), characterized in that: The screw rod (11) and the screening drum (1) are coaxially arranged. The screw rod (11) is a long rod with a spiral protrusion on the side thereof, and the raw materials to be screened can be transported downward through the protrusion on the screw rod (11). The screening drum (1) and the screw rod (11) are driven to rotate by a motor. An annular screening plate (111) with a high periphery and a low center is arranged on the inner wall of the screening drum (1), and at least two of the annular screening plates (111) are arranged. The inner side of the screening plate (111) is connected to the outer side of the spiral protrusion of the screw rod (11). The sieve drum (1) and the sieve disc (111) are fitted side by side, and a sieve opening (112) is provided at the connection between the sieve drum (1) and the sieve disc (111), and a discharge opening (102) is provided below. The raw materials falling into the sieve drum (1) are subjected to the centrifugal force generated by the rotation of the sieve drum (1) and the screw rod (11), so that the light weight materials move upward along the sieve disc (111) and are discharged from the sieve opening (112), while the heavy weight materials are retained at the axial screw rod (11), and are transported downward by the screw rod (11) and discharged from the discharge opening (102).

2. The automatic screening screw feeder according to claim 1 is characterized in that: A collecting tray (101) is provided on the outside of the screening cylinder (1); after the screened material is sent out from the screening opening (112), it falls into the collecting tray (101) for collection and is then transported via a conveyor belt.

3. The automatic screening screw feeder according to claim 1 is characterized in that: A screening cylinder cover (12) is provided above the screening cylinder (1).

4. The automatic screening screw feeder according to claim 1, characterized in that: The sieve material plates (111) have different inclinations, and the inclination of the sieve material plates (111) located at the upper layer is greater than that of the sieve material plates (111) located at the lower layer.

5. The automatic screening screw feeder according to claim 1 is characterized in that: The screening plate (111) is provided with concave patterns that diverge toward the edge along the axis.

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