CN218890790U - Roller screening device - Google Patents

Abstract

The utility model provides a roller screening device which is convenient for selecting proper roller feeding according to the types of materials to be screened so as to meet the screening requirements of different materials, particularly different grains, and relates to the technical field of screening devices. The roller screening device comprises a support, a first roller screen, a second roller screen and a hopper, wherein a first screen cavity is formed in an inner cavity of the first roller screen, a distance is reserved between the second roller screen and the first roller screen to form a second screen cavity, the hopper is installed on the support, annular feed inlets are respectively arranged at the high ends of the first screen cavity and the second screen cavity, a blanking pipe is arranged in the hopper, a first feed branch pipe of which the lower end stretches into the feed inlet of the first screen cavity is arranged at the lower end of the blanking pipe, a second feed branch pipe of which the lower end stretches into the feed inlet of the second screen cavity is also arranged in the blanking pipe, and an on-off control mechanism for controlling the on-off of the first feed branch pipe and the second feed branch pipe is arranged in the blanking pipe. The utility model is more convenient to use.

Description

Roller screening device

Technical Field

The utility model relates to the technical field of screening devices, in particular to a roller screening device.

Background

The roller screening device mainly utilizes a driving device to drive the roller screen cylinder to rotate around the axis of the roller screen cylinder, so that materials in the roller screen cylinder can be overturned and rolled, and screening equipment of the materials is completed, and the roller screening device is applied to various industries.

Grains include wheat, rice, soybean, corn and the like, in the grain processing industry, different kinds of grains may have different impurity contents and sizes, and different kinds of grains may have large particle size differences, such as: the grain size of the rice and the wheat is small, but the impurity content is large, the difference of the impurity sizes is large, the rice and the wheat not only contains a large amount of impurities larger than the grain size of the rice and the wheat, but also contains a large amount of impurities smaller than the grain size of the rice and the wheat, two times of screening are needed, the impurities are removed firstly, then the impurities are removed, the grain size of the corn and the soybean is large, but only contains a small part of impurities with small grain size, the primary screening is needed, and the screening requirement of the soybean and the corn is not met by the screen holes of the drum screen for the primary screening of the rice and the wheat, so that a proper screening strategy is needed to be selected according to the types of the grains to be screened and the impurity content. The existing roller screening device is partially provided with a multi-layer roller screen, but has the problem that proper roller feeding is inconvenient to select according to the type of the screened materials so as to realize proper screening strategies.

Disclosure of Invention

The utility model aims to provide a roller screening device which is convenient for selecting proper roller feeding according to the types of materials to be screened so as to meet the screening requirements of different materials, in particular different grains.

The technical scheme adopted for solving the technical problems is as follows: the roller screening device comprises a support, a first roller screen, a second roller screen and a hopper, wherein the first roller screen and the second roller screen are inclined and coaxially installed on the support, the first roller screen is arranged in the second roller screen, the screen holes are larger than those of the second roller screen, an inner cavity of the first roller screen forms a first screen cavity, the second roller screen and the first roller screen are provided with a distance to form a second screen cavity, the hopper is installed on the support, annular feed inlets are respectively arranged at the high ends of the first screen cavity and the second screen cavity, a blanking pipe is arranged on the hopper, the lower end of the blanking pipe is provided with a first feed branch pipe, the lower end of the first feed branch pipe stretches into the feed inlet of the first screen cavity, and a second feed branch pipe, the lower end of the second feed branch pipe stretches into the feed inlet of the second screen cavity, and an on-off control mechanism for controlling on-off of the first feed branch pipe and the second feed branch pipe is arranged in the blanking pipe.

Further, the on-off control mechanism comprises a control rod and a baffle plate which can be matched with the pipe orifice of the first feeding branch pipe and the pipe orifice of the second feeding branch pipe, the control rod is arranged between the first feeding branch pipe and the second feeding branch pipe and is rotationally connected with the blanking pipe, and one end of the baffle plate is fixedly connected with the control rod.

Further, the mesh openings of the second trommel are bar-shaped holes extending in the axial direction thereof.

Further, a plug board for feeding adjustment is arranged at the discharge hole of the hopper.

Further, a material guide plate for material guide is arranged in each of the first rotary screen and the second rotary screen.

Further, the grain receiving hopper connected with the lower end discharge port of the second rotary screen is arranged on the bracket, and the feed inlet of the lifting device is connected with the grain receiving hopper.

Further, the lifting device is a spiral lifter.

The beneficial effects of the utility model are as follows: according to the roller screening device, the blanking pipe of the hopper is provided with the first feeding branch pipe extending into the feeding port of the first screening cavity and the second feeding branch pipe extending into the feeding port of the second screening cavity, the on-off control mechanism is arranged in the blanking pipe, and the first feeding branch pipe or the second feeding branch pipe can be opened through the on-off control mechanism, so that materials can enter the first screening cavity or the second screening cavity, and proper roller feeding can be conveniently selected according to the types of the screened materials, so that screening requirements of different materials, particularly different grains, can be met, and the use is more convenient.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the connection of a hopper to a trommel;

the figure shows: the grain hopper comprises a bracket 1, a first rotary screen 2, a second rotary screen 3, a hopper 4, an inserting plate 5, a guide plate 6, a grain hopper 7, a lifting device 8, a first screen cavity 21, a strip-shaped hole 22, a second screen cavity 31, a blanking pipe 41, a first feeding branch pipe 42, a second feeding branch pipe 43, a baffle 44 and a control rod 45.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

As shown in fig. 1 and 2, the roller screening device of the utility model comprises a bracket 1, a first roller screen 2, a second roller screen 3 and a hopper 4, wherein the first roller screen 2 and the second roller screen 3 are inclined and coaxially arranged on a rotating shaft 11 on the bracket 1, the first roller screen 2 is arranged in the second roller screen 3, the sieve holes are larger than those of the second roller screen 3, the inner cavity of the first roller screen 2 forms a first sieve cavity 21, the second roller screen 3 and the first roller screen 2 are provided with a space to form a second sieve cavity 31, the hopper 4 is arranged on the bracket 1, annular feed inlets are respectively arranged at the high ends of the first sieve cavity 21 and the second sieve cavity 31, the hopper 4 is provided with a blanking pipe 41, the lower end of the blanking pipe 41 is provided with a first feed branch pipe 42, the lower end of the blanking pipe 41 is arranged into the feed inlet of the first sieve cavity 21, the inner cavity is further provided with a second feed branch pipe 43, and the lower end of the blanking pipe 41 is provided with a second feed branch pipe 43 for controlling the on-off of the second feed branch pipe 43.

The upper ends of the first sieve chamber 21 and the second sieve chamber 31 are respectively provided with annular feed inlets, and the main function of the annular feed inlets is to facilitate the rotation of the first drum sieve 2 and the second drum sieve 3, so that the first drum sieve 2 is prevented from being influenced by the first feed branch pipe 42 when rotating, and the second drum sieve 3 is prevented from being influenced by the second feed branch pipe 43 when rotating.

The first rotary screen 2 mainly has the function of screening out large impurities in the materials, so that the materials fall from the screen holes of the first rotary screen 2. The size of the sieve holes of the first rotary screen 2 is set according to the material condition in the application field, and the shape of the sieve holes can be set arbitrarily. In the grain processing field, according to the conditions of large and small impurities of grains with small grain diameters such as rice, wheat and the like, in order to facilitate sieving and removing the large impurities and not to influence material falling, the sieve holes of the first rotary screen in the embodiment of the utility model are strip-shaped holes 22 extending along the axis direction of the first rotary screen, and the length of the strip-shaped holes is 15-25 mm and the width of the strip-shaped holes is 3.5-4 mm. The screen holes adopt the strip-shaped holes 22 extending along the axis direction of the drum screen, so that the screening efficiency is higher, and the screening device is more suitable for screening large impurities of grains with small grain diameters such as rice, wheat and the like.

The second trommel 3 serves to screen out small impurities of the material, i.e. the material remains on the screening surface of the second trommel 3. The size of the sieve holes of the second drum sieve 3 is also set according to the material condition in the application field, and the shape of the sieve holes can be set arbitrarily. In the field of grain processing, according to the grain size of grains with small grain sizes such as rice, wheat and the like, in the embodiment of the utility model, the sieve holes of the second rotary screen 3 are round holes, and the aperture is 2-2.5 mm.

Taking the grain processing field as an example: the blanking pipe 41 of the hopper 4 of the roller screening device is provided with a first feeding branch pipe 42 extending into a feeding port of the first screen cavity 21 and a second feeding branch pipe 43 extending into a feeding port of the second screen cavity 31, and an on-off control mechanism is arranged in the blanking pipe 41, so that when processed materials are rice and wheat, the first feeding branch pipe 42 can be opened through the on-off control mechanism, the second feeding branch pipe 43 can be closed, and the materials can enter the first screen cavity 21, so that the materials can be removed from large impurities through the first roller screen 2 and then small impurities can be removed through the second roller screen 3; when the processed materials are soybeans and corns, the impurities are mainly small-particle impurities, in order to prevent the materials from falling from the first rotary screen 2, the first feeding branch pipe 42 can be closed through the on-off control mechanism, the second feeding branch pipe 43 is opened, the materials enter the second screen cavity 31, and the small impurities are removed by the second rotary screen 3. The roller screening device provided by the utility model is convenient for selecting proper roller feeding according to the type of the screened material so as to meet the screening requirements of different materials, in particular different grains.

The on-off control mechanism may be an electric control valve mechanism or a plugboard mechanism, as shown in fig. 2, and in the embodiment of the present utility model, the on-off control mechanism includes a control rod 45 and a baffle 44 capable of being plugged and matched with a pipe orifice of the first feeding branch pipe 42 and a pipe orifice of the second feeding branch pipe 43, where the control rod 45 is disposed between the first feeding branch pipe 42 and the second feeding branch pipe 43 and is rotationally connected with the blanking pipe 41, and one end of the baffle 44 is fixedly connected with the control rod 45. Thus, the baffle plate 44 can be turned over by rotating the control rod 45, so that the baffle plate 44 is matched with the pipe orifice of the first feeding branch pipe 42 or the pipe orifice of the second feeding branch pipe 43 to realize on-off control of the first feeding branch pipe 42 and the second feeding branch pipe 43. The structure is simple, and the control is convenient.

In the embodiment of the utility model, a material inlet adjusting plugboard 5 is arranged at the material outlet of the hopper 4. The size of the discharge hole of the hopper 4 can be adjusted by the sliding plugboard 5, so that the feed flow of the hopper to the drum screen can be adjusted, and the hopper can be turned off, thereby facilitating the overturning of the baffle 44.

In order to improve the flow speed of the materials on the screen surface of the rotary screen, a material guide plate 6 for material guide is arranged in each of the first rotary screen 2 and the second rotary screen 3. Specifically, the material guiding plate 6 may be arranged in a spiral structure or inclined relative to the axis of the drum screen, so that the drum screen rotates in a proper direction according to the arrangement mode of the material guiding plate 6, and the material can be pushed to move towards the lower end through the material guiding plate 6.

In grain processing field, need promote grain processing equipment or storage equipment such as rice mill, rice huller, rubbing crusher after the cereal screening, in order to conveniently promote the material after the screening, this is including installing the hoisting device 8 on frame 1, be equipped with the grain receiver 7 that meets with the low-end discharge gate of second drum sieve 3 on the frame 1, the feed inlet and the grain receiver 7 of hoisting device 8 meet. The lifting device 8 may be any existing lifting device, and in the embodiment of the present utility model, the lifting device is a spiral lifter. The belt is a belt with circular arc-shaped groove structure, the axis of the driving belt pulley of the driving motor is not parallel to the axis of the belt pulley of the spiral conveying shaft, and the driving belt pulley of the driving motor and the belt pulley of the spiral conveying shaft are in crossed arrangement, so that the belt is prevented from sliding out of the belt pulley groove of the belt pulley.

Claims (7)

1. Roller screening device, including support (1), first drum sieve (2), second drum sieve (3) and hopper (4), first drum sieve (2) slope and coaxial arrangement with second drum sieve (3) on support (1), first drum sieve (2) set up in second drum sieve (3), and the sieve mesh is greater than the sieve mesh of second drum sieve (3), the inner chamber of first drum sieve (2) forms first sieve chamber (21), second drum sieve (3) are equipped with the interval with first drum sieve (2) in order to form second sieve chamber (31), hopper (4) are installed on support (1), its characterized in that: the high-end of first sieve chamber (21) and second sieve chamber (31) are equipped with annular feed inlet respectively, hopper (4) are equipped with blanking pipe (41), the lower extreme of blanking pipe (41) is equipped with first feeding branch pipe (42) in the feed inlet that a lower extreme stretched into first sieve chamber (21), still is equipped with second feeding branch pipe (43) in the feed inlet that a lower extreme stretched into second sieve chamber (31), be equipped with the on-off control mechanism that is used for controlling first feeding branch pipe (42) and second feeding branch pipe (43) break-make in blanking pipe (41).

2. The roller screening device according to claim 1, wherein: the on-off control mechanism comprises a control rod (45) and a baffle (44) which can be matched with the pipe orifice of the first feeding branch pipe (42) and the pipe orifice of the second feeding branch pipe (43), the control rod (45) is arranged between the first feeding branch pipe (42) and the second feeding branch pipe (43) and is rotationally connected with the blanking pipe (41), and one end of the baffle (44) is fixedly connected with the control rod (45).

3. The roller screening device according to claim 1, wherein: the screen holes of the second rotary screen (3) are strip-shaped holes (22) extending along the axial direction of the screen holes.

4. The roller screening device according to claim 1, wherein: the discharge hole of the hopper (4) is provided with a plugboard (5) for feeding adjustment.

5. The roller screening device according to claim 1, wherein: and a material guide plate (6) for material guide is arranged in each of the first rotary screen (2) and the second rotary screen (3).

6. The roller screening device according to claim 1, wherein: the grain receiving hopper (7) connected with the low-end discharge port of the second rotary screen (3) is arranged on the support (1), and the feed inlet of the lifting device (8) is connected with the grain receiving hopper (7).

7. The roller screening device as claimed in claim 6, wherein: the lifting device (8) is a spiral lifter.

Images