Rotary feeder

Abstract

The present application relates to a rotary feeder comprising: a storage barrel, a driving unit, a rotating shaft and a rotating impeller, wherein the storage barrel has a storage cavity inside, a weighing unit is installed at a supporting point, a discharge pipe is connected to one side of the storage barrel at an angle downward, the driving unit is connected to the rotating shaft in a transmission manner, the rotating shaft extends from the bottom of the storage barrel into the interior thereof, and matches the bottom of the storage barrel, the rotating impeller is mounted on the rotating shaft and is located in the storage cavity, the rotating impeller is a ring structure of two or more layers coaxial and spaced from the middle to the outer edge, the adjacent two layers of the ring structure are connected by a number of blades, and the blades are arranged around the center of the ring structure. By replacing the single-layer blades with the multi-layer ring structure and the blades uniformly arranged around the axis of the rotating shaft on the ring structure, the discharge pipe can stably dock with the storage cavity, and the blades and the discharge pipe are always stably and dynamically intersected, so that the feeding amount is stable, and stable feeding can be achieved even when a large feeding device is running at a low load.

Description

Technical Field

[0001] The present application relates to the field of rotary feeding technology, and in particular to a rotary feeder. Background Art

[0002] Current industrial production processes in industries such as steel, electricity, nonferrous metals, coal chemical industry, silicon chemical industry, and solid waste involve the quantitative addition of large quantities of bulk granular or powdered solid materials to various high-temperature and high-pressure furnaces, gasifiers, and reactors. Stable and accurate feeding by feeders often has a significant impact on production stability, product quality, production efficiency, and raw material consumption. A rotary feeder is a volumetric feeding device that uses a rotating impeller to transport material from the feed to the discharge port, and then transports it into the kiln or reactor for reaction via conveying air. Due to its advantages such as good controllability and airtightness, rotary feeders are widely used for the continuous feeding and transportation of pressurized bulk granular or powdered solid materials.

[0003] The operating principle of existing rotary feeding devices is as follows: when a certain amount of solid material is stored in the feed tank, the solid material flows through the top plate feed port and fills the fan-shaped subspace of the rotating impeller. A variable frequency motor drives the shaft of the rotary feeding device, causing the filled fan-shaped subspace to rotate 180 degrees. The solid material in the fan-shaped subspace falls into the bottom plate discharge port. Air from the discharge pipe then acts to feed and transport the solid material.

[0004] The rotary impeller in the existing rotary feeding device adopts a single-layer divergent "orange peel" structure. In order to ensure the strength and wear resistance of the rotary impeller blades, the blades must reach a certain thickness. Therefore, when each blade rotates through the discharge port, the solid material cannot fall into the discharge port; when the blade rotates at a small angle, due to the wall effect and dynamic arching, the solid material feeding amount is small. Only when the blade rotates to a certain angle, the solid material feeding amount reaches the designed value. The feeding amount of the feeding device will fluctuate every time a blade is passed. In particular, the rotary feeding device with a large feeding amount design will have a more obvious feeding amount fluctuation when running at low load, which seriously affects the reaction effect and operation stability in the kiln and reactor.

[0005] In summary, the feeding fluctuation problem of the existing rotary feeding device is that as the scale of the feeding device increases and the operating pressure increases, the feeding stability and accuracy deteriorate, and it cannot meet the feeding stability requirements of the reaction in the kiln or reactor, resulting in poor product quality. Summary of the Invention

[0006] In view of this, the present application proposes a rotary feeder comprising a material storage barrel, a drive unit, a rotating shaft, and a rotating impeller; the material storage barrel has a material storage cavity inside, and a weighing unit is mounted at a support point; one side of the material storage barrel is connected to a discharge pipe at an angle downward; the drive unit is drivingly connected to the rotating shaft, which extends from the bottom of the material storage barrel into the interior thereof and mates with a bearing assembly located at the bottom of the material storage barrel; the rotating impeller is fixedly mounted on the rotating shaft and located within the material storage cavity; the rotating impeller comprises a ring structure of two or more layers, coaxial and spaced from the middle to the outer edge, with adjacent layers of the ring structure connected by a plurality of blades, which are arranged around the center of the ring structure.

[0007] In a possible implementation, the projection of the blade in the direction of the rotation axis is linear, and the blades in two adjacent layers of the ring structure are not located on the same straight line.

[0008] In a possible implementation, the projection of the blade in the direction of the rotation axis is arc-shaped, and the arc directions of the blades in two adjacent layers of the ring structure are opposite.

[0009] In a possible implementation, the number of layers of the ring structure is within [2, 4].

[0010] In a possible implementation, a storage space is formed between two adjacent blades in the same layer of the ring structure, and the radial lengths of the storage spaces in each layer are equal, or the volumes of the storage spaces in each layer are equal.

[0011] In a possible implementation, except for the blades in the outermost circle, each blade is arranged at the midpoint between two adjacent blades in the adjacent layer.

[0012] In a possible implementation, it also includes a feeding tank, the storage cylinder includes a cylinder body, a top plate and a bottom plate; the middle and lower sections of the feeding tank are in a trumpet-shaped structure that is wide at the top and narrow at the bottom; the cylinder body is a hollow cylinder, and is surrounded by the top plate and the bottom plate to form the storage cavity; the top plate cover is arranged on the upper part of the cylinder body, and a feed port is provided on one side of the plate surface of the top plate, the opening position of the feed port is opposite to the direction of the discharge pipe, and the top plate is provided with an air intake pipe from the radial inward direction; The air intake pipeline includes a main pipeline opened inward from the outside of the top plate, and several branch pipelines connected to the main pipeline and opened downward; the bottom plate is installed at the lower part of the barrel body, and a discharge port is opened on the bottom plate, which is connected and matched with the shape of the discharge pipe, and the discharge port is correspondingly arranged below several branch pipelines; the feeding tank is installed on the storage barrel body, and the middle and lower sections are trumpet-shaped structures that are wide at the top and narrow at the bottom, and the lower opening is connected to the inside of the storage cavity through the feed port.

[0013] In a possible implementation, the blades are provided around the outer circumference of the ring structure with the largest radius, and the blades in each layer of the ring structure are evenly distributed around the axis of the rotating shaft.

[0014] In one possible implementation, an axial hole for passing the rotating shaft is provided on the top plate and is connected to the feed port, and the axial hole is eccentrically arranged on the rotating shaft; wherein a material discharge channel is formed between the eccentrically arranged axial hole and the rotating shaft, and the material discharge channel gradually increases in width along the rotation direction of the rotating impeller on one side of the discharge pipe.

[0015] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The lower sprocket. The ring is provided with the upper bearing assembly and the upper high-pressure sealing assembly, and the top of the upper shaft extends into the storage barrel; the driving part is a servo motor, and the servo motor has its own encoder to form a closed-loop control system, which can achieve fast start and fast stop, and has a stronger lifting load capacity, and can achieve a fast response to changes in feeding amount, thereby improving feeding accuracy; a stirring part is fixedly mounted on the rotating shaft, and the stirring part is located in the feeding tank and above the rotating impeller; it also includes a PLC main control module, and the air inlet pipe is sequentially provided with a flow regulating valve and a check valve in the direction from the outside to the storage chamber, and the PLC main control module is electrically connected to the driving part and the flow regulating valve respectively.

[0016] The beneficial effects of this application are as follows: by replacing a single-layer divergent blade with a multi-layered ring structure and blades evenly distributed around the axis of the ring structure, this layered blade arrangement ensures that the discharge pipe is always stably docked with the storage chamber, and the blades and the discharge pipe are always stably and dynamically intersecting, thus ensuring a stable feeding rate. Even when a large feeding device is operating at low load, stable feeding can be achieved. This avoids the problem of blockage caused by the complete overlap of the blades and the discharge port in a single-layer divergent structure, and the problem of reduced feed rate caused by the wall effect and arching of the blades when the opening angle between the blades and the discharge pipe is very small.

[0017] Furthermore, the blades and ring structure form a closed storage space, significantly reducing the risk of material leakage and discharge caused by non-rotating factors such as pressure fluctuations, static material pressure, and vibration on the impeller blades during rotation. This reduces the impact of material leakage on the precise feeding of the rotary feeder. Furthermore, the blades are fixed between two adjacent ring structures, providing the impeller with a higher overall structural strength.

[0018] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

[0020] Figure 1 A schematic structural diagram of a rotating impeller according to an embodiment of the present application is shown;

[0021] Figure 2 A schematic diagram showing the main structure of the rotary feeder according to an embodiment of the present application is shown;

[0022] Figure 3 A schematic structural diagram showing a rotating impeller according to another embodiment of the present application;

[0023] Figure 4 A schematic structural diagram showing a rotating impeller and an integrated shaft according to a third embodiment of the present application;

[0024] Figure 5 A schematic structural diagram showing a rotary impeller according to a fourth embodiment of the present application;

[0025] Figure 6 A schematic diagram showing the structure of the top plate, the rotating shaft and the bottom plate of an embodiment of the present application in a longitudinal projection;

[0026] Figure 7 A partially enlarged schematic diagram showing an embodiment of the present application in which an upper shaft and a lower shaft are connected via a coupling;

[0027] Figure 8 The curve of the feeding amount of the existing rotary feeder (single-layer impeller) changing with the rotation speed;

[0028] Figure 9 This is a curve showing the change in feeding amount versus rotation speed of a rotary feeder with a double-layer, equal-volume storage space in this application. DETAILED DESCRIPTION

[0029] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0030] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0032] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0033] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0034] Figure 1 A schematic structural diagram of a rotating impeller according to an embodiment of the present application is shown; Figure 2 A schematic diagram showing the main structure of the rotary feeder according to an embodiment of the present application is shown; Figure 3 A schematic structural diagram showing a rotating impeller according to another embodiment of the present application; Figure 4 A schematic structural diagram showing a rotating impeller and an integrated shaft according to a third embodiment of the present application; Figure 5 A schematic structural diagram showing a rotary impeller according to a fourth embodiment of the present application; Figure 6 A schematic diagram showing the structure of the top plate, the rotating shaft and the bottom plate of an embodiment of the present application in a longitudinal projection; Figure 7A partially enlarged schematic diagram showing an embodiment of the present application in which an upper shaft and a lower shaft are connected via a coupling; Figure 8 The curve of the feeding amount of the existing rotary feeder (single-layer impeller) changing with the rotation speed; Figure 9 This is a curve showing the change in feeding amount versus rotation speed of a rotary feeder with a double-layer, equal-volume storage space in this application.

[0035] like Figures 1-9 As shown, the rotary feeder includes: a storage barrel 50, a driving part, a rotating shaft 100 and a rotating impeller 60. The storage barrel 50 has a storage cavity inside, and the upper part is open. One side of the storage barrel 50 is tilted downward and connected to a discharge pipe 70. The driving part is connected to the rotating shaft 100 in a transmission manner. The rotating shaft 100 extends from the bottom of the storage barrel 50 into the interior thereof. The rotating shaft 100 matches the bearing group located at the bottom of the storage barrel 50. The rotating impeller 60 is fixedly mounted on the rotating shaft 100 and is located in the storage cavity. The rotating impeller 60 is a ring structure 62 with two or more layers that are coaxial and spaced apart from the middle to the outer edge. The adjacent two layers of the ring structure 62 are connected by a number of blades 61, and the blades 61 are arranged around the center of the ring structure 62.

[0036] In this embodiment, a multi-layered ring structure 62 and blades 61 arranged around the axis of rotation 100 of the ring structure replace the single-layer diverging blades. This layered arrangement of blades 61 ensures that the discharge pipe 70 is always stably docked with the storage chamber, and that the blades 61 and the discharge pipe 70 are always stably and dynamically intersecting, thereby ensuring a stable feeding rate. Even when a large feeding device is operating at a low load, stable feeding can be achieved. This avoids the problem of blockage caused by the complete overlap of the blades 61 and the discharge port in a single-layer diverging structure, and the problem of reduced feed rate caused by the wall effect and arching of the blades 61 when the opening angle between the blades 61 and the discharge pipe 70 is very small.

[0037] Moreover, the design of the multi-layered ring structure 62 divides the entire rotating impeller 60 into a plurality of independent storage spaces, thereby improving the sealing performance of each storage space, and effectively improving the blowing efficiency of each storage space to the discharge pipe 50. The material is blown downward in a directional manner in each smaller storage space, and the blowing is more precise and controllable. Compared with single-layer blades, it can reasonably avoid the situation where the blowing airflow is unstable and blows downward in a single-layer blade that is too large, resulting in more energy loss and poor discharge effect.

[0038] It should be emphasized that the rotary feeder of the present application is mainly used for feeding and transporting powdered and granular solid materials. Moreover, the blades 61 and the ring structure 62 form a closed storage space, which greatly reduces the leakage and discharge problems caused by non-rotational factors such as pressure fluctuations, static pressure and vibration of the blades 61 when the rotating impeller 60 rotates, thereby reducing the impact of leakage on the precise feeding of the rotary feeding device. In addition, the blades 61 are fixed between two adjacent layers of the ring structure 62. This fixing method makes the rotating impeller 60 have a higher structural strength as a whole. The middle part of the ring structure 62 with the smallest radius is suitable for passing the rotating shaft 100 and is directly fixed to the rotating shaft 100.

[0039] In one specific embodiment, the projection of the blades 61 in the direction of the rotating shaft 100 is linear, and the blades 61 in two adjacent layers of the ring structure 62 are not located on the same straight line.

[0040] In this embodiment, the axial projection of the blade 61 on the rotating shaft 100 is linear, that is, the blade 61 is a straight blade, and the blades 61 in the two adjacent layers of the ring structure 62 are not on the same straight line in the axial projection on the rotating shaft 100, so that part of the storage space is always connected to the discharge pipe 70, and the feeding amount is stable.

[0041] In one specific embodiment, the rotary impeller 60 is a double-layer rotary impeller, which includes a rotating shaft 100, a first-layer ring structure, a second-layer ring structure, a first-layer blade 61, and a second-layer blade 61. The first-layer blade 61, the first-layer ring structure, and the second-layer ring structure constitute a first-layer storage space, and the second-layer blade 61, the second-layer ring structure, and the wall surface of the storage cavity constitute a second-layer storage space. The first-layer blade 61 and the second-layer blade 61 are arranged alternately, and the first-layer storage space and the second-layer storage space can be designed with equal length, that is, the first-layer blade 61 and the second-layer blade 61 are the same length. Since the storage space is divided into two layers, and the two layers of blades 61 are designed to be evenly arranged alternately, the problems of feed amount fluctuation and poor precision that occur in a single-layer diffuse structure are avoided.

[0042] In one specific embodiment, the projection of the blade 61 in the direction of the rotating shaft 100 is arc-shaped, and the arc directions of the blades 61 in two adjacent layers of the ring structure 62 are opposite.

[0043] In this embodiment, the impellers within two adjacent layers of the ring structure 62 have arcs in opposite directions, forming an "S" shape. As the impellers rotate with the shaft 100, the discharge pipe 70 and blades 61 continuously and dynamically intersect, eliminating problems such as blocking, wall effects, and arching, ensuring stable feeding of the rotary feeding device. To enhance the strength and self-flow resistance of the S-shaped impeller 60, a ring structure 62 is added to its outermost periphery.

[0044] The present application also provides a two-layer S-shaped rotating impeller 60, which locates the ring structure of the reinforcing blade 61 at the center of the blade 61, and the straight length of the first layer storage space in its radial direction is the same as that of the second layer storage space.

[0045] In one specific embodiment, for a large rotary feeding device, the present application provides a structure in which the rotary impeller 60 is a four-layer rotary impeller. The rotary blades 61 are composed of blades 61 and a ring structure to form four layers of storage space. The blades 61 of a layer are located at the center of two adjacent blades 61 of the previous layer, and the storage space volume of each layer is the same.

[0046] In one specific embodiment, the number of layers of the ring structure 62 is between 2 and 4.

[0047] In this embodiment, the number of layers of the ring structure 62 is preferably 2-4. Compared with the single-layer rotating impeller 60 structure, its design structure is simpler, and the number of ring structure layers is moderate, without requiring more material costs, and the ring structure 62 is suitable for occupying a smaller discharge area.

[0048] In one specific embodiment, a material storage space is formed between two adjacent blades 61 in the same layer of the annular structure 62 , and the radial length of each layer of the material storage space is the same.

[0049] In one embodiment, the volume of each storage space in the multi-layered ring structure 62 is equal.

[0050] In this embodiment, the storage space volume of each grid is equal, which makes it easier to control the discharge accuracy and makes the design of the rotary feeder of the present application more reasonable.

[0051] In one specific embodiment, each blade 61 is disposed at the midpoint between two adjacent blades 61 in the adjacent layer.

[0052] In one specific embodiment, the middle and lower sections of the feeding tank 10 are in a trumpet-shaped structure that is wider at the top and narrower at the bottom.

[0053] In one specific embodiment, the number of blades 61 is an even number.

[0054] In this embodiment, the number of blades 61 in each layer of the ring structure 62 is about 6-10, ensuring that it is divided into a relatively appropriate number of storage spaces. An even number of blades 61 can easily divide the circle evenly, making it easy for practitioners in this field to produce and process.

[0055] In one specific embodiment, a stirring portion 20 is fixedly mounted on the rotating shaft 100 . The stirring portion 20 is located in the feeding tank 10 and above the rotating impeller 60 . The driving portion is specifically a servo motor 120 that drives the reducer 110 to drive the rotating shaft 100 for transmission.

[0056] In one specific embodiment, a weighing assembly 130 for weighing the material is installed on the outer wall of the feeding tank 10 near the upper portion.

[0057] It also includes a PLC main control module. The air inlet pipe 40 is sequentially provided with a flow regulating valve and a check valve in the direction from the outside to the inside of the material storage chamber. The PLC main control module is electrically connected to the driving part and the flow regulating valve respectively.

[0058] To sum up, the working principle of the rotary feeder of the present application is as follows: a certain amount of solid material is stored in the feeding tank 10, and the driving part drives the rotating shaft 100 to rotate. The stirring part 20 stirs the material in the feeding tank 10 and starts to drop the material. The solid material fills the subspace of the rotating impeller 60 through the feed port on the top plate 30. After entering the multiple storage spaces in the rotating impeller 60, the solid material rotates with the rotating impeller 60 together with the rotating shaft 100. After this storage space rotates by a preset angle, the subspace at this position begins to overlap with the pipe mouth of the discharge pipe. At this time, the solid material in the subspace begins to be discharged along the discharge port under the action of the blowing gas in the storage cavity from the air inlet, thereby realizing the feeding and transportation of powder and granular solid materials.

[0059] In one specific embodiment, the storage cylinder 50 includes a cylinder body, a top plate 30 and a bottom plate 71. The middle and lower sections of the feeding tank 10 are in a trumpet-shaped structure with a wide top and a narrow bottom. The cylinder body is a hollow cylinder, and is surrounded by the top plate 30 and the bottom plate 71 to form a storage cavity. The top plate 30 is covered on the upper part of the cylinder body, and a feed port 31 is provided on one side of the plate surface of the top plate 30. The opening position of the feed port 31 is opposite to the direction of the discharge pipe 70, and the top plate 30 is provided with an air inlet pipe 40 from the radial inward. The air inlet pipeline 40 includes a main pipeline opened inward from the outside of the top plate 30, and several branch pipelines connected to the main pipeline and opened downward. The bottom plate 71 is installed at the lower part of the cylinder body. A discharge port that is connected and matched with the shape of the discharge pipe 70 is opened on the bottom plate 71, and the discharge port is correspondingly arranged below the several branch pipelines. The feeding tank 10 is installed on the storage cylinder body 50, and the middle and lower sections are in a trumpet structure that is wide at the top and narrow at the bottom, and the lower opening is connected to the inside of the storage cavity through the feed port 31.

[0060] In this embodiment, the storage barrel 50 includes a hollow cylindrical barrel body, and a top plate 30 and a bottom plate 71 respectively covering the upper and lower parts of the barrel body. The main barrel, the top plate 30 and the bottom plate 71 together enclose a storage chamber. A feed port 31 is provided on one side of the top plate 30. The feed tank 10 and the storage barrel 50 are connected to each other through the feed port 31. Generally, the structure of the feed port 31 is the same as the shape of a portion of the rotating impeller 60, that is, the feed port 31 is a fan-shaped structure adapted to the rotating impeller 60 to maximize the feeding area and efficiency. In addition, the feed port 31 is arranged in opposite directions to the discharge pipe 70 to ensure that the material does not directly enter the storage barrel 50 from the feed port 31 and then directly fall out of the discharge pipe 70, making the design and structure more reasonable.

[0061] Furthermore, the structure of the feeding tank 10 is a hopper structure, and the middle and lower sections are in the form of a bell mouth that is wider at the top and narrower at the bottom, and is fixedly mounted on the top plate 30 of the storage cylinder 50 .

[0062] In one specific embodiment, the air inlet line 40 is connected to the air inlet end in the material storage chamber and is oriented vertically downward.

[0063] Preferably, on the other side of the top plate 30 where the feed port 31 is not provided, an air intake pipeline 40 is provided from the outer periphery to the middle of the top plate 30. The air intake pipeline 40 includes a main pipeline and a branch pipeline. The diameter of the main pipeline is greater than or equal to the diameter of each branch pipeline, and the setting direction of the main pipeline is parallel to the direction of the plate surface of the top plate 30. Multiple branch pipelines are connected below the main pipeline, and the gas outflow direction of the branch pipeline is vertically downward, that is, the upper end of the branch pipeline is connected to the main pipeline, and the whole is set vertically downward, and the lower pipe mouth of the branch pipeline is located directly above the connection position between the storage cylinder 50 and the discharge pipe 70.

[0064] In this embodiment, the branch pipe that blows out gas vertically downward is more reasonable to cooperate with the multi-layer wheel ring structure 62 in the rotary feeder of this application. Compared with the direct side-blowing air intake method, the top-down air intake method will not be blocked by the outermost structure in the multi-layer wheel ring structure 62, avoiding affecting the blowing and discharging efficiency of the remaining layers except the outermost structure, or the airflow is completely blocked by the outermost layer.

[0065] In one specific embodiment, blades 61 are provided around the outer circumference of the ring structure 62 with the largest radius, and the blades 61 in each layer of the ring structure 62 are evenly distributed around the axis of the rotation shaft, and the number of blades 61 is an even number.

[0066] In one specific embodiment, an axial hole 32 for passing the rotating shaft is opened on the top plate 30 and is connected to the feed port 31. The axial hole 32 is eccentrically arranged on the rotating shaft, wherein a material discharge channel 33 is formed between the eccentrically arranged axial hole 32 and the rotating shaft, and the material discharge channel 33 gradually increases in width along the rotation direction of the rotating impeller 60 on one side of the discharge pipe 70.

[0067] In this embodiment, a shaft hole 32 matching the rotating shaft is opened on the top plate 30, and the shaft hole 32 is connected to the feed port 31. Normally, the feed port 31 is a fan-shaped structure. After the middle of the bottom edge of the fan is connected to the shaft hole 32, a fan-shaped structure with a circular hole protruding from the center of the bottom edge is formed. There is a gap between the shaft hole 32 and the rotating shaft. Under normal circumstances, the gap between the rotating shaft and the shaft hole 32 is equal, and the rotary feeder conveys solid and granular materials. This gap is easy to accumulate materials when unloading, and the accumulation of small amounts will affect the rotation of the shaft, thereby affecting the rotation of the shaft. The rotation of the rotating impeller 60 ultimately affects the discharge speed and efficiency, and the shaft hole 32 that is set off the center axis of the rotating shaft has an uneven gap between the shaft hole 32 and the rotating shaft, which forms the material discharge channel 33 mentioned above, and the material discharge channel 33 should gradually increase from narrow to wide along the rotation direction of the rotating impeller 60, so that the material sandwiched between the shaft hole 32 and the rotating shaft gradually rotates to a wider position under the action of the rotation of the rotating shaft, and can eventually fall down, achieving many beneficial effects such as no jamming of the feeding and no interference with the rotation of the rotating shaft, and no influence on the discharge efficiency.

[0068] In one specific embodiment, a connecting base adapted to the rotating shaft and the bearing group is provided between the bottom of the storage barrel 50 and the top of the driving part. The rotating shaft includes an upper shaft 81, a coupling 82 and a lower shaft 83. The bearing group also includes an upper high-pressure sealing assembly 93, an upper bearing assembly 91, a lower high-pressure sealing assembly 94 and a lower bearing assembly 92. The upper shaft 81 and the lower shaft 83 are axially connected through the coupling 82. The connecting base is sleeved on the outer side of the lower shaft 83, the coupling 82 and part of the upper shaft 81, and is located between the lower shaft 83 and the bottom plate 71. The lower bearing assembly 9 is arranged in a ring from bottom to top. 2 and the lower high-pressure sealing assembly 94, the upper shaft 81 is located at the bottom of the storage barrel 50, and is sequentially provided with an upper bearing assembly 91 and an upper high-pressure sealing assembly 93 from bottom to top. The top of the upper shaft 81 extends into the storage barrel 50. The driving part is a servo motor. The stirring part 20 is fixedly mounted on the rotating shaft. The stirring part 20 is located in the feeding tank 10 and above the rotating impeller 60. It also includes a PLC main control module. The air inlet pipe is sequentially provided with a flow regulating valve and a check valve in the direction from the outside to the storage chamber. The PLC main control module is electrically connected to the driving part and the flow regulating valve respectively.

[0069] It should be pointed out that after long-term use, solid particles, dust, etc. enter the transmission structure of the rotary feeder's transmission components, which are prone to failure or fragile high-pressure sealing components and bearing structures need to be replaced frequently.

[0070] In one specific embodiment, a connecting base is provided between the storage barrel 50 and the driving part. The upper and lower ends of the connecting base are open, the interior is hollow, and it is covered outside the rotating shaft. The coupling 82 axially connects the upper shaft 81 and the lower shaft 83 to form an integral rotating shaft structure. The connecting base is sleeved on the outside of the shaft structure to cover and protect the shaft system structure. The inner wall of the connecting base is adapted to the shaft structure and the high-pressure sealing assembly and bearing parts provided at the corresponding positions, thereby obtaining a technical solution that is easy for personnel in this field to maintain and maintain the high-pressure sealing assembly and bearing parts. Specifically, the connecting base is sleeved on the outside of the lower shaft 83, the coupling 82 and part of the upper shaft 81, and between the lower shaft 83 and the bottom plate 71, a lower bearing assembly 92 and a lower high-pressure sealing assembly 94 are arranged in sequence from bottom to top. The upper shaft 81 is located at the storage barrel 5 0, an upper bearing assembly 91 and an upper high-pressure sealing assembly 93 are arranged in sequence from bottom to top. When a technician in this field needs to perform regular maintenance, he only needs to remove the lower part of the shaft 83 and keep the upper shaft 81 in the rotary feeder, thereby achieving the redundant step of maintenance without disassembling the rotary feeder as a whole. The specific disassembly steps are: disassemble the drive part, the connecting base, the lower high-pressure sealing group, the lower bearing group 83, the lower shaft 83 and the coupling 82 in sequence, and then the upper high-pressure sealing assembly 93 and the upper bearing assembly 91 arranged on the lower part of the upper shaft 81 can be removed, and maintenance, cleaning or replacement or installation in reverse order can be achieved, which increases the difficulty of overhauling the bearing assembly and the high-pressure sealing assembly, reduces manpower and labor maintenance costs, and ultimately achieves a significant reduction in overhaul time.

[0071] In one specific embodiment, for a rotary feeder that still uses an integrated shaft, it is possible to avoid the need for maintenance personnel in this field to disassemble the entire mechanism for maintenance work by simply changing the position of the shaft shoulder. Figure 4 As shown, specifically: the position of the shaft shoulder is moved to above the upper high-pressure sealing assembly 93 and the upper bearing assembly 91, and the shaft section is located in each stepped shaft section below the upper high-pressure sealing assembly 93 and the upper bearing assembly 91, and the radius becomes smaller and smaller from top to bottom, so as to avoid the trouble of practitioners in this field being unable to remove the upper high-pressure sealing assembly 93 and the upper bearing assembly 91 from the shaft.

[0072] The traditional drive mode of the feeder is variable frequency motor drive. The drive described in the present invention is servo motor drive. Servo motor drive has the following advantages:

[0073] 1. High precision, realizing closed-loop control of position, speed and torque, overcoming the problem of stepping motor losing step.

[0074] 2. High speed and good high-speed performance. The general rated speed can reach 2000 to 3000 rpm.

[0075] 3. Good adaptability and strong overload resistance. It can withstand loads three times the rated torque and is particularly suitable for occasions with instantaneous load fluctuations and requirements for rapid starting. It has stronger adaptability for special materials, such as those with high moisture content, large particles, and easy material jamming.

[0076] 4. It runs smoothly at low speed and does not produce the stepping phenomenon similar to that of a stepper motor. It is suitable for occasions with high-speed response requirements.

[0077] 5. Good response, the dynamic response time of motor acceleration and deceleration is short, generally within tens of milliseconds. It is conducive to the dynamic adjustment of feeder and system.

[0078] 6. Comfort: Heat and noise are significantly reduced.

[0079] Table 1 below shows the feeding amount of the existing rotary feeder, and Table 2 below shows the comparison of the feeding amount data statistics of the rotary feeder of the present application. The feeders of the same specifications were used for testing, and only the impeller structure was different. The existing one used a conventional single impeller structure, and the impeller of the embodiment of the present application was double-layered, and the impeller with equal storage space on each layer was used for the experiment. The following two sets of comparative data are for reference:

[0080]

[0081] Table 1 Statistical data of feeding amount of existing rotary feeder (single-layer impeller)

[0082]

[0083] Table 2 Statistical data of feeding amount of rotary feeder with double-layer and equal-volume storage space in this application

[0084] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A rotary feeder, characterized in that: It includes a storage cylinder, a driving part, a rotating shaft and a rotating impeller; The storage barrel has a storage cavity inside, and one side of the storage barrel is connected to a discharge pipe which is tilted downward; The driving part is in transmission connection with the rotating shaft, the rotating shaft extends from the bottom of the storage barrel into the interior thereof, and the rotating shaft matches the bearing group located at the bottom of the storage barrel; The rotating impeller is fixedly mounted on the rotating shaft and is located in the material storage chamber. The rotating impeller is a ring structure having two or more layers coaxially and spaced apart from each other from the middle to the outer edge. Two adjacent layers of the ring structure are connected by a plurality of blades, and the blades are arranged around the center of the ring structure. The projection of the blade in the direction of the rotating shaft is arc-shaped, and the arc directions of the blades in two adjacent layers of the ring structure are opposite; A storage space is formed between two adjacent blades in the same layer of the ring structure, and the volume of the storage space in each layer is equal; The top of the charging aperture is formed on one side of the charging aperture, and the bottom of the charging aperture is formed on the other side of the charging aperture, and the charging aperture is connected with the charging aperture of the charging aperture to form a through-hole, and the like. The top plate is provided with an axial hole for passing the rotating shaft, which is connected to the feed port, and the axial hole is eccentrically arranged on the rotating shaft; wherein a material discharge channel is formed between the eccentrically arranged axial hole and the rotating shaft, and the material discharge channel gradually increases in width along the rotation direction of the rotating impeller on one side of the discharge pipe.

2. The rotary feeder according to claim 1, characterized in that The number of layers of the ring structure is between 2 and 4.

3. The rotary feeder according to claim 1, characterized in that Except for the blades in the outermost circle, each blade is arranged at the midpoint of two adjacent blades in the adjacent layer.

4. The rotary feeder according to claim 1, characterized in that The blades are arranged around the outer circumference of the wheel ring structure with the largest radius, and the blades in each layer of the wheel ring structure are evenly distributed around the axis of the rotating shaft.

5. The rotary feeder according to claim 1, characterized in that A connecting base adapted to the rotating shaft and the bearing assembly is provided between the bottom of the storage cylinder and the top of the driving part; The rotating shaft includes an upper shaft, a coupling and a lower shaft; The bearing assembly further comprises an upper high-pressure seal assembly, an upper bearing assembly, a lower high-pressure seal assembly and a lower bearing assembly; The upper shaft and the lower shaft are axially connected through the coupling, the connecting base is sleeved on the outer sides of the lower shaft, the coupling and part of the upper shaft, and a lower bearing assembly and a lower high-pressure sealing assembly are arranged in sequence from bottom to top between the lower shaft and the bottom plate; The upper shaft is located at the bottom of the material storage barrel, and is annularly provided with the upper bearing assembly and the upper high-pressure sealing assembly in sequence from bottom to top, and the top of the upper shaft extends into the material storage barrel; The driving part is a servo motor; A stirring portion is fixedly mounted on the rotating shaft, and the stirring portion is located in the feeding tank and above the rotating impeller; It also includes a PLC main control module. The air inlet pipe is sequentially provided with a flow regulating valve and a check valve in the direction from the outside to the inside of the material storage chamber. The PLC main control module is electrically connected to the driving part and the flow regulating valve respectively.

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