CN107030008A - A kind of agricultural cereal three level screen device - Google Patents

Abstract

The invention discloses a three-stage screening device for agricultural grains, which comprises a screening box installed on a frame, the screening box is fixed on the upper end of the frame, and a material inlet is provided in the middle part on the left side of the top of the screening box. There is an auger feeding mechanism at the butt joint of the feed port; a blast pipe is provided on the right side of the feed port, and the blast pipe is connected with an external blower; inside the screening box, a coarse screen and a fine screen are installed at intervals from top to bottom. net; on the right side of the screening box, there are first sundries outlet, grain outlet and second sundries outlet; a shock-absorbing base is installed in the middle of the bottom end of the frame, and a vibration motor is fixed on the shock-absorbing base, and an eccentric connection The rod assembly connects the vibrating end of the vibrating motor with the bottom of the bottom plate of the screening box. The left side of the screening box is provided with a suction pipe, and the inner end of the suction pipe communicates with the inside of the screening box through multiple suction ports, and the outer end is connected to the bag filter. butt.

Description

A three-stage screening device for agricultural grain

technical field

The invention relates to the field of agricultural machinery and equipment, in particular to a three-stage screening device for agricultural grains.

Background technique

At present, after the grain is harvested, impurities such as stones and sand are often mixed into the grain, which affects the overall quality of the grain. Therefore, the grain screening machine is usually used to clean the grain and separate large impurities such as stones and sand grains in the raw materials. However, during the use of the existing drum-type grain screening machine, because the angle of the screen drum is mostly fixed, it cannot be adjusted according to different materials and different cleaning requirements, resulting in unsatisfactory screening effect. The shriveled grains, drum skins, wheat ear silk mixed in the grain grains and the dust wrapped in the finished product flow cannot be effectively separated.

In addition, due to the many impurities in the grain in the existing drum type grain screening machine, a large amount of dust will appear during the screening process, which will affect the health of the operators. And in the process of farmers selling grain, the screening of grain particles has become an important processing step. Most of the existing grain screening vibrating cleaning sieves only have the first-level classification and screening function, and the material classification degree is low. Sometimes multiple devices are used for series screening to achieve multi-grain size classification, which greatly wastes space resources and increases costs. Grain grading and screening cannot be efficiently completed in multiple stages; most of the existing vibrating cleaning sieves cannot efficiently remove the dust generated during the screening process, causing great harm to the environment and operators. If manual separation is adopted, not only the workload of farmers will be increased, but also the operation speed will be slow, the work efficiency will be low, time-consuming and laborious, and the quality will be unstable.

Contents of the invention

The object of the present invention is to provide a three-stage screening device for agricultural grains to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A three-level screening device for agricultural grains, comprising a screening box installed on a frame, the screening box is fixed on the upper end of the frame, and a feeding port is provided in the left middle part of the top of the screening case, and the butt joint of the feeding port There is an auger feeding mechanism; the right side of the feeding port is provided with a blast pipe, and the blast pipe is connected to the external blower; inside the screening box, a coarse screen and a fine screen are installed at intervals from top to bottom; The auger feeding mechanism includes a conveying cylinder docked with the feeding port. The top of one side of the conveying cylinder is provided with a feeding port, and the bottom of the other side is provided with a discharge channel, and the feeding port is connected to the silo; A feeding auger is installed in the barrel; the first debris outlet, the grain outlet and the second debris outlet are arranged on the right side of the screening box; a shock-absorbing base is installed in the middle of the bottom end of the frame, and a shock-absorbing base is fixed on the shock-absorbing base A vibration motor, an eccentric connecting rod assembly connects the vibration end of the vibration motor and the bottom end of the bottom plate of the screening box, the left side of the screening box is provided with a suction pipe, and the inner end of the suction pipe communicates with the inside of the screening box through multiple suction ports, The outer end is docked with the bag filter, and chain conveyors are respectively arranged under the outlets of the first sundries outlet, the grain outlet and the second sundries outlet.

As a further technical solution of the present invention, both the coarse screen and the fine screen are designed with an inclination angle of 10° to 35°.

As a further technical solution of the present invention, the inclination angle is 26°.

As a further technical solution of the present invention, the feeding auger includes a rotating shaft and a helical blade fixed on the rotating shaft. The rotating shaft is rotatably installed in the conveying cylinder through a bearing. One end of the rotating shaft extends out of the conveying cylinder and connects with the first transmission The motor is connected through a coupling.

As a further technical solution of the present invention, the middle part of the silo is equipped with a stirring shaft spanning both sides of the silo, the stirring shaft is rotatably installed in the silo through a bearing, and one end of the stirring shaft extends out of the silo. A section of the stirring shaft located in the silo is fixed with several groups of evenly spaced stirring assemblies, and one end of the stirring shaft protruding out of the silo is fixedly connected to the second transmission motor through a coupling.

As a further technical solution of the present invention, the stirring assembly includes 3 stirring round rods evenly distributed on the circumference.

As a further technical solution of the present invention, the first transmission motor and the second transmission motor are fixed on the upper end of the frame through the motor bracket.

As a further technical solution of the present invention, the first debris outlet is located at the bottom right of the coarse screen, the grain outlet is located at the bottom right of the fine screen, and the second debris outlet is located at the bottom right of the coarse screen.

As a further technical solution of the present invention, the eccentric link assembly is composed of an upper strut and a lower strut, and the upper strut and the lower strut are fixedly connected by a connecting shaft.

As a further technical solution of the present invention, a sound insulation board is installed on the periphery of the frame to reduce the noise during its operation.

Compared with the prior art, the present invention is convenient to control the feeding speed and feeding uniformity through the auger conveying and feeding; the impurities in the grain can be effectively separated through the double-layer screen sorting, and the wind blowing can effectively separate the impurities from the grain. Impurities and dust are collected and separated, making the grains after screening very clean and improving the screening effect.

Description of drawings

Fig. 1 is a structural schematic diagram of a three-stage screening device for agricultural grains of the present invention.

Fig. 2 is a schematic structural diagram of the stirring assembly in Fig. 1 .

Fig. 3 is a schematic structural diagram of the eccentric transmission rod in Fig. 1 .

detailed description

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

Please refer to Figures 1 to 3, a three-stage screening device for agricultural grains, including a screening cabinet 11 installed on a frame 17, the screening cabinet 11 is fixed on the upper end of the frame 17, and the left middle part of the top of the screening cabinet 11 There is a feeding port 24, which is connected with an auger feeding mechanism; the right side of the feeding port is provided with a blast pipe 25, and the blast pipe 25 is docked with an external blower; the inside of the screening cabinet 11 is Coarse screening net 22 and fine screening net 20 are installed at intervals from top to bottom, and coarse screening net 22 and fine screening net 20 are all inclined designs and its inclination angle is between 10 °～35 °; In a kind of preferred embodiment of the present invention , the inclination angle is 26°.

The auger feeding mechanism includes a conveying cylinder 2 docked with the feed port 24, the top of one side of the conveying cylinder 2 is provided with a feed port 7, and the bottom of the other side is provided with a discharge channel, and the feed port 7 It is connected with the silo 4; the feeding auger is installed in the conveying cylinder 2, and the feeding auger includes a rotating shaft 11 and a screw blade 3 fixed on the rotating shaft 11, and the rotating shaft 11 is rotatably installed in the conveying cylinder 2 through a bearing , one end of the rotating shaft 11 extends out of the conveying cylinder 2 and is docked with the first transmission motor 10 through a coupling;

During specific implementation, the middle part in the feed bin 4 is equipped with a stirring shaft 5 across both sides of the feed bin 4, the stirring shaft 5 is rotatably installed in the feed bin 4 by bearings, and one end of the stirring shaft 5 stretches out of the feed bin 4 In addition, a section of the stirring shaft 5 located in the silo 4 is fixed with several groups of evenly spaced stirring assemblies 6 , and one end of the stirring shaft 5 protruding out of the silo 4 is fixedly connected to the second transmission motor 10 through a coupling;

In a preferred embodiment of the present invention, the stirring assembly 6 includes 3 stirring round rods evenly distributed on the circumference.

In a preferred embodiment of the present invention, the first transmission motor 10 and the second transmission motor 10 are fixed on the upper end of the frame 17 through the motor bracket 9 .

The first debris outlet 23, the grain outlet 21 and the second debris outlet 19 are provided on the right side of the screening cabinet 11, wherein the first debris outlet 23 is positioned at the bottom right side of the coarse screen 22, and the grain outlet 21 is positioned at On the right side of the bottom end of the fine screen 20 , the second sundry outlet 19 is located on the right side below the coarse screen 22 .

A shock-absorbing base 13 is installed in the middle part of the bottom end of the frame 17, and a vibration motor 14 is fixed on the shock-absorbing base. The assembly 11 is composed of an upper pole 18 and a lower pole 15, and the upper pole 18 and the lower pole 15 are fixedly connected by a connecting shaft 16, and the left side of the screening cabinet 11 is provided with a suction pipe 26, and the air suction The inner end of the pipe 26 communicates with the inside of the screening cabinet 11 through a plurality of suction ports, and the outer end is connected with the bag filter 12 .

In a preferred solution of the present invention, the outlet ends of the first debris outlet 23, the grain outlet 21 and the second debris outlet 19 are all equipped with chain conveyors corresponding to them, so as to facilitate timely transportation and transfer. .

In a preferred solution of the present invention, a sound insulation board is installed on the periphery of the frame 17 to reduce the noise during its operation.

The present invention is convenient to control the feeding speed and feeding uniformity by conveying the feed through the auger; the impurities in the grain can be effectively separated through the double-layer screen sorting, and the impurities and dust can be effectively collected and separated in combination with the wind blowing, so that The grain after screening is very clean, which improves the screening effect.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the purpose of this patent. kind of change.

Claims (9)

1. A three-level screening device for agricultural grains, comprising a screening cabinet installed on a frame, the screening cabinet is fixed on the upper end of the frame, and the left middle part of the top of the screening cabinet is provided with a feed inlet, the feed inlet There is an auger feeding mechanism for the docking of the feed port; a blast pipe is provided on the right side of the feed port, and the blast pipe is docked with an external blower; it is characterized in that a coarse screen and a screen are installed at intervals from top to bottom inside the screening box. Fine screen; the auger feeding mechanism includes a conveying cylinder docked with the feed inlet, the top of one side of the conveying cylinder is provided with a feed inlet, and the bottom of the other side is provided with a discharge channel, and the feed inlet is connected to the feed inlet. The silos are connected; the feeding auger is installed in the conveying cylinder; the first sundry outlet, the grain outlet and the second sundry outlet are arranged on the right side of the screening box; a shock-absorbing base is installed in the middle of the bottom of the frame, A vibrating motor is fixed on the shock-absorbing base, and an eccentric connecting rod assembly connects the vibrating end of the vibrating motor and the bottom of the bottom plate of the screening box. The left side of the screening box is provided with a suction pipe, and the inner end of the suction pipe passes through multiple suction ports. It is connected to the inside of the screening box, and the outer end is connected to the bag filter. The first sundries outlet, the grain outlet and the second sundries outlet are all equipped with chain conveyors corresponding to them under the outlet ends. 2. A three-stage screening device for agricultural grains according to claim 1, characterized in that both the coarse screen and the fine screen are designed to be inclined and the angle of inclination is 10° to 35°. 3. A three-stage screening device for agricultural grains according to claim 2, characterized in that the inclination angle is 26°. 4. A three-stage screening device for agricultural grain according to claim 1, wherein the feeding auger comprises a rotating shaft and a helical blade fixed on the rotating shaft, the rotating shaft is rotatably installed in the conveying cylinder through a bearing, and the rotating shaft One of the ends extends out of the conveying cylinder and is connected with the first transmission motor through a coupling. 5. A three-stage screening device for agricultural grains according to claim 1, characterized in that, the middle part of the silo is equipped with a stirring shaft spanning both sides of the silo, and the stirring shaft is rotatably installed on the hopper through a bearing. In the silo, one end of the stirring shaft protrudes out of the silo, and a section of the stirring shaft inside the silo is fixed with several groups of evenly spaced stirring components. drive motor. 6 . The three-stage screening device for agricultural grains according to claim 5 , wherein the stirring assembly includes 3 stirring round rods evenly distributed on the circumference. 6 . 7. A three-stage screening device for agricultural grain according to claim 1, wherein the first sundry outlet is located at the bottom right side of the coarse screen, the grain outlet is located at the bottom right side of the fine screen, and the second outlet is located at the bottom right side of the fine screen. The second debris outlet is located on the right side below the coarse screen. 8. A three-stage screening device for agricultural grains according to claim 4 or 5, characterized in that the first transmission motor and the second transmission motor are fixed on the upper end of the frame through a motor bracket. 9. A three-stage screening device for agricultural grains according to claim 1, characterized in that, the eccentric connecting rod assembly is composed of an upper strut and a lower strut, and the upper strut and the lower strut are connected by The shaft is fixedly connected.