Spiral feeding device and asphalt mixing station

Abstract

The application relates to the asphalt feeding field, and provides a spiral feeding device and an asphalt mixing station, which comprise a feeding mechanism, a scattering mechanism and a screening mechanism. The feeding mechanism comprises a first feeding pipeline and a second feeding pipeline which are connected with each other and are used for driving powder to pass through the first feeding pipeline and the second feeding pipeline in sequence and then be sent out. The scattering mechanism is arranged in the first feeding pipeline and is used for scattering the powder entering the first feeding pipeline. The screening mechanism comprises multiple groups of screen mesh structures which are arranged on the pipe wall of the second feeding pipeline and are sequentially arranged along the length direction of the second feeding pipeline, so that the powder with different particles after being scattered is screened and discharged. The powder can be treated in the conveying process, the functionality and the practicability of the equipment are improved, the powder can be conveyed along the preset pipeline path, the powder can be secondarily scattered and screened, and different particles can be screened out through the screening mechanism.

Description

Technical Field

[0001] This application relates to the field of asphalt mixing equipment, and in particular to a screw conveyor and an asphalt mixing plant. Background Technology

[0002] The screw conveyor system in asphalt mixing towers is a device that uses a drive unit to rotate a screw, thereby conveying materials by pushing. This system has multi-directional conveying capabilities and can be arranged horizontally, inclined, or vertically. It also boasts advantages such as simple structure, small cross-sectional area, excellent sealing, convenient operation, low maintenance costs, and ease of enclosed transport. In asphalt mixing operations, the screw conveyor system is primarily responsible for transferring aggregates such as sand and mineral powder. However, in actual working conditions, some aggregates may exhibit agglomeration or exceed particle size standards. Directly conveying such substandard aggregates can not only lead to uneven mixing in the asphalt mixing equipment but may also cause material jamming in the conveyor system, resulting in blockages in the equipment or the entire conveying channel. Utility Model Content

[0003] This application aims to improve at least one technical problem in the background art.

[0004] This application provides a spiral feeding device, which includes a feeding mechanism, including a first feeding pipe and a second feeding pipe. The first feeding pipe and the second feeding pipe are connected to each other and are used to drive powder to pass through the first feeding pipe and the second feeding pipe in sequence and then be fed out.

[0005] A dispersing mechanism is provided inside the first feeding pipeline and is used to disperse the powder entering the first feeding pipeline.

[0006] The screening mechanism includes multiple sets of screen structures, which are arranged sequentially on the wall of the second feeding pipeline along the length of the second feeding pipeline to screen and discharge powder of different particles after dispersal.

[0007] According to some technical solutions of this application, multiple discharge plates are spaced apart on the outer side of the second feeding pipeline, and multiple sets of the screen structure are separated by the multiple discharge plates.

[0008] According to some technical solutions of this application, each group of screen structures is provided with multiple screening holes, and the diameter of the screening holes gradually decreases along the feeding direction of the second feeding pipeline.

[0009] According to some technical solutions of this application, the second feeding pipeline includes a driving device, a screw rod, screw blades and a screw cylinder. The screw cylinder is connected to the first feeding pipeline. The screw rod is disposed inside the screw cylinder. The screw blades are sleeved on the screw rod. The driving device is used to drive the screw rod to rotate. Multiple sets of screens are disposed on the bottom wall of the screw cylinder.

[0010] According to some technical solutions of this application, the first feeding pipeline includes a feeding cylinder, a driving mechanism, a rotating shaft, and a rotating blade. The feeding cylinder is connected to the second feeding pipeline. The rotating shaft is located inside the feeding cylinder. The rotating blade is sleeved on the rotating shaft. The driving mechanism is located outside the feeding cylinder and connected to the rotating shaft to drive the rotating shaft to rotate. The dispersing mechanism includes a cutter, which is fixed on the rotating shaft and alternately arranged with the rotating blade.

[0011] According to some technical solutions of this application, the dispersing mechanism further includes a conveying cylinder, which is disposed inside the feeding cylinder. The rotating shaft, rotating blade and the cutter are all disposed inside the conveying cylinder. The conveying cylinder is provided with an inlet and an outlet. The inlet is used to connect to the feeding pipeline, and the outlet is disposed on the side wall of the conveying cylinder to allow the powder to be dispersed and enter the feeding cylinder along the outlet.

[0012] According to some technical solutions of this application, the cutter includes an annular seat and a cutter head. The annular seat is fixed on the rotating shaft, and the cutter head has a plate-like structure and is distributed along the circumference of the annular seat.

[0013] The second aspect of this application discloses an asphalt mixing plant, which includes the screw feeding device described in the above technical solution.

[0014] The spiral feeding device provided in this application has at least the following beneficial effects: it can not only convey powder along a preset pipeline path, but also perform secondary dispersion and screening of the powder, and classify and screen out different particles through a screening mechanism, thereby providing conditions for subsequent uniform and stable feeding. Attached Figure Description

[0015] Figure 1 A perspective structural diagram of the screw feeding device provided in the embodiments of this application;

[0016] Figure 2 Internal structure diagram of the second feeding pipeline provided in the embodiments of this application;

[0017] Figure 3 A cross-sectional view of the first feeding pipeline provided in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the structure of the cutter provided in an embodiment of this application.

[0019] In the attached diagram: 100-first feeding pipe; 110-feeding cylinder; 130-rotating shaft; 150-conveying cylinder; 200-second feeding pipe; 210-drive device; 220-screw rod; 230-screw blade; 240-screw cylinder; 250-discharge plate; 300-screening mechanism; 400-dispersing mechanism; 410-cutter; 411-ring seat; 412-cutter head. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0022] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0023] The following is combined Figures 1 to 4 The embodiments of this utility model are described below.

[0024] This application provides a spiral feeding device, which includes a feeding mechanism, comprising a first feeding pipe 100 and a second feeding pipe 200, wherein the first feeding pipe 100 and the second feeding pipe 200 are connected to each other, for driving powder material to pass through the first feeding pipe 100 and the second feeding pipe 200 in sequence and then being fed out.

[0025] The first feeding pipe 100 and the second feeding pipe 200 are respectively equipped with an inlet and an outlet, forming a feeding channel between them. The outlet of the first feeding pipe 100 is connected to the inlet of the second feeding pipe 200. The powder first enters through the inlet of the first feeding pipe 100 and is conveyed to the second feeding pipe 200 under its action. Then, it continues to be conveyed under the drive of the second feeding pipe 200 and finally exits from the second feeding pipe 200, thus realizing the continuous conveying of powder along the preset pipeline path. In actual configuration, it can be set to an inclined configuration with the inlet end higher and the outlet end lower. Combined with the rotation direction of the rotating blades, it can assist the material to flow in the correct direction, reduce the risk of backflow, and reduce the accumulation of powder at the inlet.

[0026] The first feeding pipe 100 is equipped with a dispersing mechanism 400 for dispersing the powder entering the first feeding pipe 100; the second feeding pipe 200 is equipped with a screening mechanism 300, wherein the screening mechanism 300 includes multiple sets of screen structures, which are arranged sequentially along the length of the second feeding pipe 200 on the pipe wall to screen and discharge powder of different particle sizes after dispersal. The screen diameter can be configured as needed to achieve controllable particle size to adapt to different particle size requirements. In this way, there is no need for separate crushing and conveying operations, reducing equipment changeover time, and both processes can be completed in a single operation, improving work efficiency and saving operation steps and space.

[0027] Therefore, by setting up a first feeding pipeline 100 and a second feeding pipeline 200 that are interconnected, and setting up a dispersing mechanism 400 and a screening mechanism 300 in them respectively, the powder can be processed during the conveying process, which improves the functionality and practicality of the equipment. It can not only convey the powder along the preset pipeline path, but also perform secondary dispersing and screening of the powder, and screen out different particles through the screening mechanism 300, thereby providing conditions for subsequent uniform and stable feeding.

[0028] In some embodiments, a plurality of discharge plates 250 are spaced apart on the outer side of the second feeding pipe 200, and the multiple sets of screen structures are separated by the multiple discharge plates 250. Powders of different particle sizes separated by the screening mechanism 300 are sent out through the corresponding screen holes along the discharge plates 250 on the outer side of the second feeding pipe 200 to avoid mixing of materials of different particle sizes. Alternatively, the external pipe can be connected to the discharge plates 250 to transport the separated powders of specific particle sizes to designated locations such as different raw material bins, so as to achieve graded collection and transfer.

[0029] Optionally, each set of screen structures is provided with multiple screening holes, the diameter of which gradually decreases along the feeding direction of the second feeding pipe 200. The powder first passes through the first set of screens with larger apertures, separating smaller particles; the remaining larger particles continue forward, passing through the next set of screens with smaller apertures, further separating even smaller particles. Alternatively, large particles that cannot pass through all screens are discharged from the end of the first feeding pipe 100 or the second feeding pipe 200, thus completing the stepped screening. In this way, the separated materials of different particle sizes can be reused as needed, reducing raw material waste.

[0030] In some embodiments, the second feeding pipeline 200 includes a driving device 210, a screw rod 220, a screw blade 230, and a screw cylinder 240. The screw cylinder 240 is connected to the first feeding pipeline 100. The screw rod 220 is disposed inside the screw cylinder 240, and the screw blade 230 is sleeved on the screw rod 220. The driving device 210 is used to drive the screw rod 220 to rotate. Multiple sets of screens are disposed on the bottom wall of the screw cylinder 240.

[0031] Specifically, taking a drive motor as an example, the drive device 210 starts, driving the spiral rod 220 inside the spiral cylinder 240 to rotate, and the spiral blades 230 sleeved on the spiral rod 220 rotate synchronously. The dispersed powder enters the spiral cylinder 240 from the first feeding pipe 100, and the spiral blades 230 apply axial thrust to the powder through rotation, pushing the powder to move along the length of the spiral cylinder 240. During the movement, the powder contacts multiple sets of screens on the bottom wall of the spiral cylinder 240. After screening, the material is discharged from the screens or the end of the spiral cylinder 240.

[0032] In some embodiments, the first feeding pipe 100 includes a feeding cylinder 110, a drive mechanism, a rotating shaft 130, and rotating blades. The feeding cylinder 110 communicates with the second feeding pipe 200. The rotating shaft 130 is disposed inside the feeding cylinder 110, and the rotating blades are sleeved on the rotating shaft 130. The drive mechanism is disposed outside the feeding cylinder 110 and connected to the rotating shaft 130 to drive the rotating shaft 130 to rotate. The dispersing mechanism 400 includes a cutter 410, which is fixed on the rotating shaft 130 and alternately arranged with the rotating blades. In actual configuration, in order to accommodate the cutter 410, the original spiral blades 230 are segmented, leaving space on the spiral cylinder and spiral rod. During assembly, the cutter and spiral blades are alternately installed, so that each cutter 410 is located between the left and right segments of the spiral blades. In addition, the size of the cutter and the number of blades can also be configured according to the actual space to reduce interference with the spiral blades.

[0033] Similarly, the drive mechanism starts, causing the rotating shaft 130 inside the feeding cylinder 110 to rotate. The rotating blades on the shaft rotate synchronously with the cutter 410. After the powder enters the feeding cylinder 110, the rotating blades push the powder forward. During the movement, the cutter 410 cuts and breaks up any clumps of powder. Under the continuous push of the rotating blades, the broken-up powder enters the second feeding pipe 200 from the feeding cylinder 110. This avoids clogging the screen or affecting the screening accuracy after clumps enter the second feeding pipe 200, eliminating the need for a separate breaking-up device, reducing equipment changeover time, and improving operational efficiency.

[0034] In some embodiments, the dispersing mechanism 400 further includes a conveying cylinder 150, which is disposed inside the feeding cylinder 110. The rotating shaft 130, the rotating blade, and the cutter 410 are all disposed inside the conveying cylinder 150. The conveying cylinder 150 is provided with an inlet and an outlet. The inlet is used to connect to the feeding pipeline, and the outlet is disposed on the side wall of the conveying cylinder 150 to allow the powder to be dispersed and then enter the feeding cylinder 110 along the outlet.

[0035] During operation, since the conveying cylinder 150 is located inside the feeding cylinder 110 of the first feeding pipeline 100, the powder enters the conveying cylinder 150 through the feeding pipeline. The rotating shaft 130 drives the cutter 410 and the rotating blade to rotate. The cutter 410 breaks up the powder in the conveying cylinder 150, crushing large lumps into small particles; the rotating blade pushes the material to move. The broken powder enters the feeding cylinder 110 through the discharge hole on the side wall of the conveying cylinder 150, and is then conveyed by the feeding cylinder 110 to the second feeding pipeline 200; the large pieces of material that are not broken up are confined inside the conveying cylinder and continue to be cut and broken up by the cutter, or are sent out along the discharge end set at the end of the conveying cylinder.

[0036] In some optional embodiments, the cutter 410 includes an annular seat 411 and a cutter head 412. The annular seat 411 is fixed on the rotating shaft, and the cutter head 412 has a plate-like structure and is distributed along the circumference of the annular seat 411. The rotating shaft drives the annular seat 411 to rotate, and the plate-like cutter heads on the annular seat 411 rotate synchronously with the shaft. During rotation, the plate-like cutter heads come into contact with the agglomerated powder and break up the powder agglomerates through their blades. The annular seat 411 ensures that the cutter heads 412 are evenly distributed along the circumference of the rotating shaft, allowing the powder to be cut and broken up at all positions within the conveying cylinder. The plate-like cutter heads increase the contact area with the powder, improving cutting efficiency, while preventing material jamming due to the complex structure of the cutter heads 412. Optionally, the cutter head 412 can be made of wear-resistant alloys such as high-manganese steel or high-temperature resistant steel to avoid rapid wear of components. This reduces maintenance frequency, extends equipment life, and enhances conveying stability.

[0037] This application also provides an asphalt mixing plant, which includes a screw conveyor as disclosed in any of the above embodiments. Since the asphalt mixing tower adopts the screw conveyor disclosed in the embodiments of this application, the asphalt mixing tower also has the technical advantages of the screw conveyor disclosed in the embodiments of this application, and will not be described in detail in the embodiments of this application.

[0038] Furthermore, certain terms in this specification have been used to describe embodiments of this specification. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this specification. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be appropriately combined in one or more embodiments of this specification.

[0039] The preferred embodiments of this application have been described in detail above, but this application is not limited to the embodiments described. Without departing from the spirit and scope of this specification, those skilled in the art can make equivalent modifications or alternative configurations based on the embodiments in this specification to implement the application in this specification. These equivalent modifications or alternatives are all included within the scope defined by the claims of this application.

Claims

1. A screw feeding device, characterized in that: include: The feeding mechanism includes a first feeding pipe and a second feeding pipe, which are connected to each other and are used to drive the powder material through the first feeding pipe and the second feeding pipe in sequence before it is fed out. A dispersing mechanism is provided inside the first feeding pipeline and is used to disperse the powder entering the first feeding pipeline. The screening mechanism includes multiple sets of screen structures, which are arranged sequentially on the wall of the second feeding pipeline along the length of the second feeding pipeline to screen and discharge powder of different particles after dispersal.

2. The screw feeding device according to claim 1, characterized in that: Multiple discharge plates are spaced apart on the outer side of the second feeding pipe, and the multiple sets of screen structures are separated by the multiple discharge plates.

3. The screw feeding device according to claim 2, characterized in that: Each of the screen structures is provided with multiple screening holes, and the diameter of the screening holes gradually decreases along the feeding direction of the second feeding pipeline.

4. The screw feeding device according to claim 1, characterized in that: The second feeding pipeline includes a driving device, a screw rod, screw blades, and a screw cylinder. The screw cylinder is connected to the first feeding pipeline. The screw rod is located inside the screw cylinder, and the screw blades are sleeved on the screw rod. The driving device is used to drive the screw rod to rotate. Multiple sets of screens are located on the bottom wall of the screw cylinder.

5. The screw feeding device according to claim 1, characterized in that: The first feeding pipeline includes a feeding cylinder, a driving mechanism, a rotating shaft, and a rotating blade. The feeding cylinder is connected to the second feeding pipeline. The rotating shaft is located inside the feeding cylinder, and the rotating blade is sleeved on the rotating shaft. The driving mechanism is located outside the feeding cylinder and connected to the rotating shaft to drive the rotating shaft to rotate. The dispersing mechanism includes a cutter, which is fixed on the rotating shaft and alternately arranged with the rotating blade.

6. The screw feeding device according to claim 5, characterized in that: The dispersing mechanism also includes a conveying cylinder, which is located inside the feeding cylinder. The rotating shaft, rotating blade, and cutter are all located inside the conveying cylinder. The conveying cylinder has an inlet and an outlet. The inlet is used to connect to the feeding pipeline, and the outlet is located on the side wall of the conveying cylinder to allow the powder to be dispersed and then enter the feeding cylinder through the outlet.

7. The screw feeding device according to claim 5, characterized in that: The cutter includes an annular seat and a cutter head. The annular seat is fixed on the rotating shaft, and the cutter head has a plate-like structure and is distributed along the circumference of the annular seat.

8. An asphalt mixing plant, characterized in that: Includes the screw feeder as described in any one of claims 1-7.

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