Drum screening machine

Abstract

The utility model discloses a drum screening machine which comprises a machine frame, a feeding mechanism is arranged on the upstream portion of the machine frame, a drum screen is arranged on the downstream portion of the feeding mechanism and communicated with the feeding mechanism, the drum screen is arranged on the machine frame in a rotating mode and driven to rotate through a driving mechanism arranged on one side, and a plurality of lifting plates are arranged in the drum screen. And the lifting plate is obliquely arranged on the inner side wall of the drum screen. According to the drum screening machine, the material raising plates are arranged in the drum screen, when materials are rotationally filtered, the materials attached to the interior of the drum screen can be raised and turned over, and then the screening efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fertilizer production, and in particular relates to a drum screening machine. Background Art

[0002] In modern agricultural production, fertilizer is one of the key factors to improve crop yield and quality. Fertilizer production involves multiple preparation processes, from raw materials to finished products. In multiple processes, material screening is involved. When screening materials, a rotary drum screen is used for screening. Qualified materials are screened from the bottom and enter the next process. Unqualified particles are discharged from the tail of the drum screen for collection or another process. The existing drum screen is set to an inclined setting. In order to ensure the efficiency of screening, the inclination angle should not be too large. If it is too large, it will easily cause insufficient screening, and if it is too small, it will easily cause the material to be unable to move forward. Therefore, during the screening process, the existing drum screen is prone to the problem that the material is always at the bottom of the drum screen when the drum screen rotates, and is not dispersed and all piled up at the bottom. The screening area is small, which leads to poor screening effect. Utility Model Content

[0003] In view of the above-mentioned shortcomings, the purpose of the utility model is to provide a drum screening machine, which solves the problem in the prior art that the material is always at the bottom of the drum screen when it rotates, resulting in poor screening effect.

[0004] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0005] A drum screening machine comprises a frame, a feeding mechanism is arranged upstream of the frame, a cylindrical screen is arranged downstream of the feeding mechanism and the cylindrical screen is connected to the frame, the cylindrical screen is rotatably mounted on the frame and driven to rotate by a driving mechanism arranged on one side, a plurality of lifting plates are arranged inside the cylindrical screen, and the lifting plates are obliquely arranged on the inner wall of the cylindrical screen.

[0006] By adopting the above structural design and arranging a plurality of lifting plates in the drum screen, the material attached to the inside of the drum screen can be lifted and turned when the material is rotated and filtered, thereby improving the screening efficiency.

[0007] As a further improvement, the lower frame of the cylindrical screen is connected to a conveying device arranged downstream to convey the screened material. The cylindrical screen includes a frame, a connecting shaft and a screen. The screen is mounted on the frame. The connecting shaft passes through the frame and is fixedly connected. One end of the connecting shaft is rotatably mounted on a mounting piece fixed on the frame at an upstream position, and the other end of the connecting shaft is connected to a driving mechanism arranged downstream.

[0008] With the above structural design, the two ends of the cylindrical screen are rotatably connected via mounting parts and a driving mechanism respectively, and the driving mechanism drives the cylindrical screen to rotate as a whole to achieve material screening.

[0009] As a further improvement, the driving mechanism includes a first driving motor and a transmission assembly. The first driving motor is fixedly installed on the frame through a mounting bracket and is located at the discharging end of the cylindrical screen. The first driving motor is connected to the connecting shaft through a rotating assembly and drives the cylindrical screen to rotate.

[0010] As a further improvement, the cylindrical screen can be partitioned into multiple regions by a framework, and one or more of the material lifting plates are provided in each region.

[0011] With the above structural design, the cylindrical screen is provided with a framework to partition it into multiple regions, which can improve the stress intensity of the cylindrical screen. And the multiple material lifting plates provided inside can improve the material lifting efficiency, ensure that the materials are turned over during the rotation of the cylindrical screen, and improve the screening efficiency.

[0012] As a further improvement, the cylindrical screen is inclined, and its upstream end is connected to the feeding mechanism for feeding. The middle part automatically screens and drops the materials, and the downstream end is provided with an outlet for the materials that have not passed through the screen.

[0013] With the above structural design, it can ensure that the materials are screened as completely as possible during the screening process, and at the same time ensure that the materials that have not passed through the screen are discharged from the lower outlet.

[0014] As a further improvement, baffles are provided on both sides of the cylindrical screen on the frame, and a shielding cover is provided above the cylindrical screen.

[0015] With the above structural design, it can not only ensure that the materials leak out, but also prevent sundries from entering the inside of the cylindrical screen and affecting the product quality.

[0016] As a further improvement, the feeding mechanism includes a feed bin. The feed bin is connected to an inclined transmission assembly to lift the materials. The upper end of the transmission assembly is provided with a slide plate that slopes downward, and the outlet of the slide plate is arranged inside the upstream end of the cylindrical screen.

[0017] As a further improvement, the transmission assembly includes a conveyor belt and a second driving motor for driving the conveyor belt to move, and a number of limiting bumps are evenly arranged on the conveyor belt.

[0018] With the above structural design, it can realize the automatic feeding of materials into the cylindrical screen for screening. At the same time, the limiting bumps arranged on the conveyor belt can ensure that the materials will not automatically fall during the transmission.

[0019] As a further improvement, a limiting mechanism is provided at the lower end of the slide plate. The limiting mechanism includes a limiting roller rotatably installed at the end of the slide plate. The limiting roller is spaced from the slide plate by a certain distance, and a brush is provided on the limiting roller. The limiting roller is driven to rotate by a third driving motor provided below.

[0020] With the above structural design, by setting a limiting mechanism at the sliding material plate, it can not only limit the material, prevent too much material from feeding, but also, by setting a brush on the limiting roller, assist the material feeding and clean the excess material on the sliding material plate.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] 1. In the drum screening machine of the present utility model, by setting a number of material lifting plates inside the drum sieve, when rotating and filtering the material, the material attached to the inside of the drum sieve can be lifted and flipped, thereby improving the screening efficiency;

[0023] 2. The present utility model is provided with a limiting mechanism at the upstream sliding material plate of the drum sieve, which can limit the material, prevent too much material from feeding. At the same time, a brush is provided on the limiting roller, which can assist the feeding during its rotation and also clean the material on the sliding material plate. Description of the Drawings

[0024] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0025] Figure 1 is a structural schematic diagram of the present utility model;

[0026] Figure 2 is Figure 1 an enlarged view of part A in

[0027] Figure 3 is Figure 1 an enlarged view of part B in

[0028] In the figure:

[0029] Frame 1, baffle 1a, feeding mechanism 2, feed bin 2a, conveying assembly 2b, conveyor belt 21b, second driving motor 22b, convex block 23b, sliding material plate 2c, cylindrical sieve 3, skeleton 3a, connecting shaft 3b, screen 3c, mounting member 3d, outlet 3e, driving mechanism 4, first driving motor 4a, transmission assembly 4b, transmission chain 41b, driven gear 42b, mounting frame 4c, speed reducer 4d, driving gear 4e, material lifting plate 5, limiting mechanism 6, limiting roller 6a, brush 6b, third driving motor 6c. Detailed Description of the Embodiment

[0030] In order to explain in detail the technical content, structural features, achieved purposes and effects of the present utility model, the following is described in detail in conjunction with the embodiments and with reference to the drawings.

[0031] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0032] Please refer to Figures 1 to 3 , a drum screening machine, including a frame 1, a feeding mechanism 2 is provided upstream of the frame 1, a cylindrical screen 3 is provided downstream of the feeding mechanism 2 and is connected, the cylindrical screen 3 is rotatably installed on the frame 1, and is driven to rotate by a driving mechanism 4 provided on one side. A plurality of material lifting plates 5 are provided inside the cylindrical screen 3, and the material lifting plates 5 are inclinedly arranged on the inner side wall of the cylindrical screen 3. The material lifting plates 5 are arranged inside the cylindrical screen 3, and can turn over the materials attached to the inside when the cylindrical screen 3 rotates, thereby improving the screening efficiency. In this embodiment, the direction of the feeding mechanism 2 is defined as the upstream direction.

[0033] The frame 1 below the cylindrical screen 3 is connected to a conveying device arranged downstream to convey the screened materials. The cylindrical screen 3 includes a skeleton 3a, a connecting shaft 3b and a screen mesh 3c, the screen mesh 3c is installed on the skeleton 3a, and the connecting shaft 3b passes through the skeleton 3a and is fixedly connected. The skeleton 3a is provided in multiple groups and is designed as a disc shape corresponding to the cylindrical screen 3, thereby ensuring the load-bearing capacity of the cylindrical screen 3. One end of the connecting shaft 3b is rotatably installed on a mounting member 3d fixed to the frame 1 at the upstream position, and the other end of the connecting shaft 3b is connected to the driving mechanism 4 arranged downstream. The upper end of the mounting member 3d is internally placed inside the cylindrical screen 3 and is rotatably connected to the connecting shaft 3b, and the lower end of the mounting member 3d protrudes outside the cylindrical screen 3 and is fixedly connected to the frame 1 below, thereby realizing the support of the cylindrical screen 3. In this embodiment, the cylindrical screen 3 can be partitioned into multiple regions by the skeleton 3a, and one or more of the material lifting plates 5 are provided in each region, and the setting position and quantity of the material lifting plates 5 can be changed according to the screening effect.

[0034] Please continue to refer to Figure 2The driving mechanism 4 includes a first driving motor 4a and a transmission assembly 4b. The first driving motor 4a is fixedly mounted on the frame 1 through a mounting frame 4c and is located at the discharge end of the cylindrical screen 3. The first driving motor 4a is connected to the connecting shaft 3b through a rotating assembly 4b and drives the cylindrical screen 3 to rotate. The specific structure is as follows: the rotating assembly 4b includes a transmission chain 41b and a driven gear 42b fixedly connected to the end of the connecting shaft 3b. The first driving motor 4a is provided with a reducer 4d, and the output end of the reducer 4d is provided with a driving gear 4e, and the driving gear 4e is connected to the driven gear 42b through the transmission chain 41b.

[0035] In this embodiment, the cylindrical screen 3 is tilted to reduce the speed of the material entering the downstream, thereby ensuring that the material is fully screened and that the material enters the downstream smoothly. The upstream end is connected to the feeding mechanism 2 for feeding, the middle part automatically screens the falling material, and the downstream end is provided with an outlet 3e for the material that has not passed the screen. The frame 1 is provided with baffles 1a on both sides of the cylindrical screen 3, and a shielding cover is provided above the cylindrical screen 3.

[0036] Please continue reading Figure 3 The feeding mechanism 2 includes a silo 2a, which is connected to an inclined conveying assembly 2b to lift the material. The upper end of the conveying assembly 2b is provided with a sliding plate 2c inclined downward, and the outlet of the sliding plate 2c is arranged in the upstream end of the cylindrical screen 3. The conveying assembly 2b includes a conveyor belt 21b and a second driving motor 22b for driving the conveyor belt 21b to move, and a plurality of limiting protrusions 23b are evenly arranged on the conveyor belt 21b, so that the conveyor belt 21b can be isolated into multiple areas, which is convenient for lifting and feeding the granular material.

[0037] Furthermore, a limiting mechanism 6 is provided at the lower end of the sliding plate 2c, and the limiting mechanism 6 includes a limiting roller 6a rotatably mounted on the end of the sliding plate 2c, and the limiting roller 6a is spaced a certain distance from the sliding plate 2c, so as to facilitate the automatic sliding of the material into the cylindrical screen 3, and a brush 6b is provided on the limiting roller 6a, and the brush 6b can assist the material to pass through during the rotation of the limiting roller 6a, and can also clean the material. The limiting roller 6a is driven to rotate by a third driving motor 6c provided below.

[0038] The working principle of the utility model is as follows:

[0039] When screening materials through this drum screen, first, the materials are loaded into the silo 2a. The second drive motor 22b drives the conveyor belt 21b to rotate, and the materials are lifted to the top and then enter the chute plate 2c. The materials slide down automatically and enter the cylindrical screen 3. At this time, the limiting mechanism 6 provided on the chute plate 2c plays a limiting role to prevent the materials from entering too fast or unevenly. At the same time, the first drive mechanism 4 drives the rotation of the cylindrical screen 3, and the materials are screened as the cylindrical screen 3 rotates. The screened materials enter the next process from below, and the larger particles roll to the end outlet 3e. During the screening process, the material lifting plate 5 provided in the cylindrical screen 3 can play a role in turning the materials to prevent the materials from rotating along with the rotation of the cylindrical screen 3, thereby improving the screening efficiency.

[0040] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention. Any other devices using the same or similar structures are within the protection scope of the present invention.

Claims

1. A drum screening machine, comprising a frame (1), a feeding mechanism (2) being provided upstream of the frame (1), a cylindrical screen (3) being provided downstream of the feeding mechanism (2) and being connected to each other, characterized in that: The cylindrical screen (3) is rotatably mounted on the frame (1) and driven to rotate by a driving mechanism (4) arranged on one side. A plurality of lifting plates (5) are arranged inside the cylindrical screen (3), and the lifting plates (5) are obliquely arranged on the inner wall of the cylindrical screen (3); The frame (1) below the cylindrical screen (3) is connected to a conveying device arranged downstream to convey the screened material. The cylindrical screen (3) comprises a frame (3a), a connecting shaft (3b) and a screen (3c). The screen (3c) is mounted on the frame (3a). The connecting shaft (3b) passes through the frame (3a) and is fixedly connected. One end of the connecting shaft (3b) is rotatably mounted on a mounting member (3d) fixed on the frame (1) at an upstream position. The other end of the connecting shaft (3b) is connected to a driving mechanism (4) arranged downstream.

2. A drum screening machine according to claim 1, characterized in that: The driving mechanism (4) comprises a first driving motor (4a) and a transmission assembly (4b); the first driving motor (4a) is fixedly mounted on the frame (1) via a mounting frame (4c) and is located at the discharge end of the cylindrical screen (3); the first driving motor (4a) is connected to the connecting shaft (3b) via the transmission assembly (4b) and drives the cylindrical screen (3) to rotate.

3. A drum screening machine according to claim 1, characterized in that: The cylindrical screen (3) can be divided into a plurality of areas by a frame (3a), and one or more lifting plates (5) are provided in each area.

4. A drum screening machine according to claim 1, characterized in that: The cylindrical screen (3) is arranged obliquely, and the upstream end is connected to the feeding mechanism (2) for feeding, the middle part automatically screens the falling materials, and the downstream end is provided with an outlet (3e) for the materials that have not passed the screen.

5. A drum screening machine according to claim 1, characterized in that: Baffles (1a) are provided on the frame (1) at both sides of the cylindrical screen (3), and a shielding cover is provided above the cylindrical screen (3).

6. A drum screening machine according to claim 1, characterized in that: The feeding mechanism (2) comprises a silo (2a), the silo (2a) being connected to an inclined conveying assembly (2b) to lift the material, the upper end of the conveying assembly (2b) being provided with a sliding plate (2c) inclined downward, the outlet of the sliding plate (2c) being arranged in the upstream end of the cylindrical screen (3).

7. A drum screening machine as claimed in claim 6, characterized in that: The conveying assembly (2b) comprises a conveying belt (21b) and a second driving motor (22b) for driving the conveying belt (21b) to move, and a plurality of limiting protrusions (23b) are evenly arranged on the conveying belt (21b).

8. A drum screening machine as claimed in claim 6, characterized in that: A limiting mechanism (6) is provided at the lower end of the sliding plate (2c), and the limiting mechanism (6) comprises a limiting roller (6a) rotatably mounted on the end of the sliding plate (2c), the limiting roller (6a) being spaced a certain distance from the sliding plate (2c), and a brush (6b) being provided on the limiting roller (6a), and the limiting roller (6a) is driven to rotate by a third driving motor (6c) arranged below.

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