CN207560832U - A kind of millet cleaning plant - Google Patents

Abstract

A millet cleaning device, the cleaning device includes a frame and a feeding assembly arranged on the frame, a threshing assembly, a screening assembly, a winnowing assembly, a grain conveying assembly, a power assembly and a control mechanism, the control mechanism and the power assembly , threshing assembly, screening assembly, air selection assembly and grain conveying assembly are electrically connected to regulate the power assembly to drive the threshing assembly, screening assembly, air selection assembly and grain conveying assembly to complete the threshing, screening, air selection and grain conveying of millet raw materials Operation. The utility model provides a millet cleaning device, which can remarkably improve the grain cleaning quality through the effective coordination of grain rubbing rollers, centrifugal winnowing, multi-stage vibration screening and the like.

Description

A millet cleaning device

technical field

The utility model relates to the technical field of mechanical equipment for cleaning crops and grains, in particular to a millet cleaning device.

Background technique

With the continuous improvement of the development level of agricultural mechanization in our country, modern agricultural production pays more and more attention to the harvesting technology of grains. However, the harvested grains usually contain a lot of unnecessary adulterants and more incompletely hulled grains. These incompletely hulled grains and adulterants not only affect the overall quality of the grains after cleaning, but also Cause the larger entrainment loss rate of grain, and also be unfavorable for the appearance and sale of grain. Therefore, need to carry out cleaning processing to grain by a kind of new cleaning mechanical equipment.

The existing traditional grain cleaning machines in the prior art can meet the basic requirements of grain cleaning, but there are still problems such as single cleaning function, unstable technical performance, backward process equipment and high entrainment loss rate, which cannot well meet the current situation in my country. actual needs of the stage.

Therefore, aiming at the biological characteristics of millet, it is a problem to be solved at present to design and prepare a millet cleaning device with ingenious structure, low processing cost and high cleaning rate, so as to meet the needs of the market.

Contents of the invention

In order to solve the technical problem of single cleaning function and serious entrainment loss of the grain cleaning machine in the prior art, the utility model provides a kind of grain cleaning device, which uses grain rubbing rollers, centrifugal winnowing, multi-stage vibration Screening and other effective cooperation methods have significantly improved the quality of grain cleaning.

In order to solve the above-mentioned technical problems, the utility model adopts a technical scheme as follows: a millet cleaning device, which includes a frame and a feeding assembly, a threshing assembly, a screening assembly, and a winnowing assembly arranged on the frame. , grain conveying assembly, power assembly and control mechanism, the control mechanism is electrically connected with the power assembly, threshing assembly, screening assembly, winnowing assembly and grain conveying assembly, and is used to regulate the power assembly to drive the threshing assembly, screening assembly, air selection assembly and grain The conveying components complete the threshing, screening, winnowing and grain conveying of millet raw materials;

The feeding assembly includes a feeding hopper arranged at the top of the frame, and the threshing assembly includes driving rollers whose central axes are parallel to each other, driven rollers and pressure rollers, and conveyor belts wound around the driving rollers and driven rollers. The angle between the plane formed by the central axis of the driving roller and the central axis of the driven roller and the vertical direction is 20-30°, and the pinch roller is arranged between the driving roller and the driven roller, and rubs against the conveyor belt contact, the discharge port of the feeding hopper is set above the pinch roller and the conveyor belt, and the millet raw materials unloaded from the discharge port are threshed through the extrusion friction between the pinch roller and the conveyor belt;

The screening assembly includes a first-level sieve and a second-level sieve arranged in parallel up and down, the first-level sieve and the second-level sieve are at an angle of 5-10° to the horizontal plane, and along the first-level sieve and the second-level sieve In the inclined direction, the highest end of the primary sieve and the lowest end of the secondary sieve have overlapping parts in the vertical direction. The primary sieve and the secondary sieve are evenly provided with a plurality of sieve holes, and the sieve holes The diameter is 1.05-1.2 times of the particle size of millet, and the matching double rocker mechanism and crank linkage mechanism are set on the primary sieve and the secondary sieve, which are used to process the materials on the primary sieve and the secondary sieve. Push-up screening along its inclined direction;

The winnowing assembly includes a centrifugal fan fixed on the frame, which is arranged on the side close to the lowest end of the primary screen, and has an angle of 8-15° between the air outlet pipe and the horizontal plane, for Cooperate with the screening component to separate the grain and impurities by winnowing;

The grain conveying assembly includes a V-shaped collecting plate arranged under the screening assembly and a screw conveyor installed in the concave groove of the V-shaped collecting plate, one side of the V-shaped collecting plate is tangent to the end bottom plate of the air outlet pipe of the centrifugal fan , and the bottom of the V-shaped collecting plate is located below the output end of the screw conveyor to open a grain outlet.

Preferably, the feeding hopper is in the shape of a funnel with a wide top and a narrow bottom.

Preferably, the angle between the plane formed by the central axis of the driving roller and the central axis of the driven roller and the vertical direction is 23°.

Preferably, the included angle between the primary sieve and the secondary sieve and the horizontal plane is 7°.

Preferably, the angle between the air outlet pipe of the centrifugal fan and the horizontal plane is °.

Preferably, the power assembly includes two electric motors electrically connected to the control mechanism, and the two electric motors respectively provide power for the centrifugal fan and the driving roller, and the crank linkage mechanism in the centrifugal fan and the screening assembly transmits power through a belt, and the driving The power is transmitted between the roller and the screw conveyor through the pulley.

Preferably, the primary sieve is a woven sieve, the secondary sieve is a punching sieve, the sieve aperture of the woven sieve is 1.1-1.2 times the grain diameter, and the sieve aperture of the punching sieve is 1.05 times the grain diameter. -1.1 times.

Preferably, the included angle of the V-shaped collecting plate is 100-130°.

The beneficial effects of the utility model:

1. The millet cleaning device of the present utility model, through the setting of grain rubbing rollers, multi-stage sieve plates and centrifugal fans, can realize the re-threshing of grains through the squeezing and frictional slipping action between the pressing roller and the conveyor belt. The push-type multi-stage screening of the primary screen and the secondary screen and the directional winnowing and separation of the centrifugal fan, the multi-step cooperation completes the thorough cleaning of the millet raw materials. The overall structure of the device is simple, the functions are diverse, the cleaning efficiency is high, the stability is good, and the entrainment loss rate is low, the quality of the finished millet is good, and at the same time, the operation is simple, the processing cost is low, and it is suitable for popularization and use.

2. The threshing assembly of the present invention includes a driving roller, a pinch roller, a driven roller and a conveyor belt. The grain and debris are discharged between the pinch roller and the conveyor belt through the feeding hopper. Due to the slipping effect between the pinch roller and the conveyor belt, there will be a certain speed difference between the two, and the grain that has not been completely threshed before will be re-threshed. Threshing. The secondary threshing function of the threshing unit can reduce the unnecessary entrainment loss of the grain, provide a better foundation for the later screening and winnowing operations, and also improve the cleaning effect of the entire cleaning machine.

3. The screening assembly of the present invention includes a primary sieve and a secondary sieve with a woven sieve and a punching sieve respectively. By using different sieve surfaces for the upper and lower vibrating sieves, the grains that are easy to be screened can be obtained first. After passing through the first-level sieve, the grain residues that are difficult to clean are screened through the second-level sieve with punching screens in the lower layer, and then through two layers of different degrees of screening, the grain and residues can be better separated. separate. The primary sieve and the secondary sieve are parallel to each other and form an angle of 7° upward with the horizontal plane. The included angle can ensure that the grains and debris keep moving upwards at a constant speed along the inclined direction under the multiple effects of the double rocker mechanism, the crank linkage mechanism and its own gravity, so as to prolong the residence time on the screen and increase the grain being screened. The time period, thereby improving the cleaning effect of grain.

4. The millet cleaning device of the present invention, through the setting of the V-shaped collecting plate and the screw conveyor under the screening assembly, can realize better collection and transportation of the grains after cleaning, and prevent blockage in the cleaning device. Thereby the working efficiency of the whole cleaning device is improved.

Description of drawings

Fig. 1 is a structural schematic front view of the utility model;

Fig. 2 is the structural representation right view of the utility model;

Fig. 3 is the structural representation of threshing assembly in the utility model;

Fig. 4 is the structural representation of screw conveyor in the utility model;

Fig. 5 is the structural representation of the primary sieve in the utility model;

Fig. 6 is the structural representation of secondary sieve in the utility model;

Reference signs: 1, grain outlet, 2, screw conveyor, 3, centrifugal fan, 4, frame, 5, conveyor belt, 6, feeding hopper, 7, primary sieve, 8, driving roller, 9, pressing Roller, 10, driven roller, 11, V-shaped collection plate, 12, secondary sieve, 13, crank linkage mechanism, 14, double rocker mechanism.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in the figure, a millet cleaning device includes a frame 4 and a feeding assembly, a threshing assembly, a screening assembly, a winnowing assembly, a grain conveying assembly, a power assembly and a control assembly arranged on the frame 4. Mechanism, the control mechanism is electrically connected with the power component, threshing component, screening component, winnowing component and grain conveying component, and is used to regulate the power component to drive the threshing component, screening component, winnowing component and grain conveying component to complete the millet raw material threshing, Screening, winnowing and grain conveying operations;

The feeding assembly includes a feeding hopper 6 arranged on the top of the frame 4, the feeding hopper 6 is placed above the driving roller 8 of the threshing assembly, and is shaped like a triangular funnel with a wide top and a narrow bottom. The threshing assembly is arranged on the top of the frame, including a driving roller 8 whose central axis is parallel to each other, a driven roller 10 and a pressure roller 9, and a conveyor belt 5 that is wound on the driving roller 8 and the driven roller 10, and the driving roller 8 The angle between the plane and the vertical direction formed by the central axis of the central axis and the central axis of the driven roller 10 is 23°, and the pinch roller 9 is arranged between the driving roller 8 and the driven roller 10, and rubs against the conveyor belt 5 contact, and the power is transmitted between the rollers through the conveyor belt 5. The discharge port of the feeding hopper 6 is arranged above the pinch roller 9 and the conveyor belt 5, and the millet raw material unloaded from the discharge port passes between the pinch roller 9 and the conveyor belt 5. The extrusion friction between them is used for threshing, and the whole threshing assembly is fixedly connected with the small frame 4 by bolts.

The screening assembly includes a first-level sieve 7 and a second-level sieve 12 arranged in parallel up and down, the first-level sieve 7 is the sieve surface of the woven sieve, the second-level sieve 12 is the sieve surface of the punching sieve, and the sieve aperture of the woven sieve is grain 1.1-1.2 times the diameter, the sieve aperture of the punching screen is 1.1.05-1.1 times the grain diameter. The primary sieve 7 and the secondary sieve 12 all form an angle of 5-10° with the horizontal plane, and on the inclined direction along the primary sieve 7 and the secondary sieve 12, the highest end of the primary sieve 7 and the secondary sieve The lowest end of the sieve 12 has an upper and lower overlapping portion in the vertical direction, and the first-stage sieve 7 and the second-stage sieve 12 are evenly provided with a plurality of sieve holes, and the diameter of the sieve holes is 1.05-1.2 times the grain diameter , the primary screen 7 and the secondary screen 12 are equipped with a matching double rocker mechanism 14 and a crank linkage mechanism 13, which are used to process the materials on the primary screen 7 and the secondary screen 12 along the direction of their inclination. Upward push-vibration screening; the two-layer screens are respectively fixed and powered by two sets of double-rocker mechanisms and two sets of crank-link mechanisms, and the joints of the double-rocker mechanisms and crank-link mechanisms are connected by rolling bearings. In order to reduce the wear on the connecting parts, at the same time, the primary screen is placed under the threshing assembly, and the material threshed by the threshing assembly passes through a guide plate and is dumped onto the screen surface of the primary screen. The first-level sieve and the second-level sieve have upper and lower overlapping parts. The sieve surfaces of the first-level sieve and the second-level sieve are parallel and placed upward and at 7° to the horizontal plane. Screening effect for grains.

Described winnowing assembly comprises the centrifugal fan 3 that is fixed on the frame 4 by bolts, and this centrifugal fan 3 is arranged on the side close to the lowest end of the primary screen 7, and there is a clamping angle of 10° between the air outlet pipe and the horizontal plane. Corner, used for winnowing and separating grains and impurities in cooperation with screening components;

The grain conveying assembly includes a V-shaped collecting plate 11 arranged below the screening assembly and a screw conveyor 2 installed in the concave groove of the V-shaped collecting plate 11, and one side of the V-shaped collecting plate 11 is connected to the air outlet duct of the centrifugal fan 3 The end bottom plate is tangent, and the bottom of the V-shaped collecting plate 11 is located below the output end of the screw conveyor 2 to open a grain outlet 1 . The screw conveyor is designed under the screening assembly, and is welded by the screw blade and the shaft. One side of the screw conveyor communicates with the grain outlet 1, which is convenient for removing the conveyed grains from the device.

The power assembly includes two motors electrically connected to the control mechanism, the two motors provide power for the centrifugal fan 3 and the driving roller 8 respectively, and the driving roller of the threshing assembly transmits power to the driven roller through a belt, and at the same time, passes The pulley on the driving roller transmits the power to the screw conveyor below; the centrifugal fan transmits the power to the active part of the crank linkage mechanism of the primary screen through the belt, and the vibration of the primary screen is realized through the crank linkage mechanism of the primary screen And its active part transmits power to the active part of the crank linkage mechanism of the secondary screen, thereby realizing the vibration of the secondary screen.

Working principle of the utility model:

When working, the grain raw material is fed through the feeding hopper and reaches the threshing assembly. Due to the slipping effect between the pressing roller and the conveyor belt in the threshing assembly, there is a speed difference between the grain raw material and the conveyor belt. The grain is subjected to secondary threshing. The setting of the threshing unit can reduce the entrainment rate during grain cleaning. Grain grains, chaff and light debris processed by the threshing assembly enter the screening assembly below through the guide plate, and are screened twice in different degrees by two vibrating screens with different screen surfaces and interact with the centrifugal fan. Cooperate to effectively separate grain grains from chaff and light impurities. The grains fall through the sieve holes into the V-shaped collecting plate below the screening assembly. Transported to the grain outlet, the chaff and light debris are discharged out of the machine through the miscellaneous discharge port under the action of the centrifugal fan, thus realizing the cleaning of the grain.

During the cleaning process, chaff, light debris and grain grains have different floating speeds. When objects with different floating speeds move relative to the airflow, they receive different airflow forces. Therefore, when designing, the centrifugal fan The airflow speed is set to be higher than the floating speed of chaff and light debris, and at the same time lower than the floating speed of grain grains. The effective cleaning of grain grains is realized through the different forces of airflow on different objects.

The millet cleaning device of the utility model is simple in structure and easy to use, can realize secondary threshing of grains, and effectively prolongs the screening time of millet on the sieve, thereby improving the screening effect of millet. The grain conveying component installed at the lower end of the device is equipped with a screw conveyor, which can accelerate the transport of the cleaned grains to the grain discharge port, prevent blockage in the cleaning device, and thus improve the working efficiency of the entire cleaning device.

Claims (8)

1. a kind of millet cleaning plant, it is characterised in that：The cleaning plant includes rack（4）And it is arranged on rack（4）On Feed component, threshing component, screening component, selection by winnowing component, seed conveying assembly, Power Component and control mechanism, control mechanism It is electrically connected with Power Component, threshing component, screening component, selection by winnowing component and seed conveying assembly, to regulate and control Power Component band Dynamic threshing component, screening component, selection by winnowing component and seed conveying assembly be respectively completed the threshing of millet raw material, screening, selection by winnowing and Seed conveys operation；

The feed component includes being arranged on rack（4）One feeding hopper on top（6）, it is mutual that threshing component includes central axes Parallel drive roll（8）, driven voller（10）And hold-down roller（9）And around being located at drive roll（8）And driven voller（10）On transmission Band（5）, the drive roll（8）Central axes and driven voller（10）The plane that is formed of central axes and vertical direction between folder Angle is 20-30 °, hold-down roller（9）It is arranged on drive roll（8）And driven voller（10）Between, and and conveyer belt（5）CONTACT WITH FRICTION, institute State feeding hopper（6）Discharge port be arranged on hold-down roller（9）And conveyer belt（5）Top, the millet raw material warp dropped from discharge port Hold-down roller（9）And conveyer belt（5）Between extrusion friction carry out threshing；

The screening component includes the level-one being arranged in parallel up and down sieve（7）It is sieved with two level（12）, level-one sieve（7）It is sieved with two level （12）It is in 5-10 ° of angle between horizontal plane, and is sieved along level-one（7）It is sieved with two level（12）Inclined direction on, level-one Sieve（7）Most significant end and two level sieve（12）Least significant end in the vertical direction have upper and lower lap, the level-one sieve（7） It is sieved with two level（12）On be uniformly provided with multiple sieve pores, and 1.05-1.2 times of a diameter of millet grain size of sieve pore, level-one sieve （7）It is sieved with two level（12）On be both provided with the double rocker mechanism mating with it（14）And toggle（13）, for one Grade sieve（7）It is sieved with two level（12）On material shake formula screening along upward the pushing away of its inclined direction；

The selection by winnowing component includes being fixed on rack（4）On centrifugal blower（3）, the centrifugal blower（3）It is positioned close to one Grade sieve（7）The side of least significant end, and the angle between its air outlet pipeline and horizontal plane in 8-15 °, for matching with screening component It closes and selection by winnowing separation is carried out to grain and impurity；

The seed conveying assembly includes being arranged on the V-arrangement collecting board below screening component（11）With mounted on V-arrangement collecting board （11）Auger conveyor in recessed groove（2）, V-arrangement collecting board（11）Side and centrifugal blower（3）The end of air outlet pipeline Bottom plate is tangent, and V-arrangement collecting board（11）Bottom be located at auger conveyor（2）Output end below offer grain outlet（1）.

2. a kind of millet cleaning plant according to claim 1, it is characterised in that：The feeding hopper（6）It presents under width Narrow funnel-form.

3. a kind of millet cleaning plant according to claim 1, it is characterised in that：The drive roll（8）Central axes and Driven voller（10）The plane that is formed of central axes and vertical direction between angle be 23 °.

4. a kind of millet cleaning plant according to claim 1, it is characterised in that：The level-one sieve（7）It is sieved with two level （12）Angle between horizontal plane is 7 °.

5. a kind of millet cleaning plant according to claim 1, it is characterised in that：The centrifugal blower（3）Air outlet Angle between pipeline and horizontal plane is 10 °.

6. a kind of millet cleaning plant according to claim 1, it is characterised in that：The Power Component includes and control Two motor of mechanism electrical connection, two motor are respectively centrifugal blower（3）And drive roll（8）Power is provided, and is centrifuged Wind turbine（3）With the toggle in screening component（13）Pass through belt passing power, drive roll（8）With auger conveyor （2）Between pass through belt wheel passing power.

7. a kind of millet cleaning plant according to claim 1, it is characterised in that：The level-one sieve（7）For wire gauze sieve, Two level is sieved（12）For stamped sieve, the screen-aperture of wire gauze sieve is 1.1-1.2 times of grain diameter, and the screen-aperture of stamped sieve is paddy 1.05-1.1 times of grain diameter.

8. a kind of millet cleaning plant according to claim 1, it is characterised in that：The V-arrangement collecting board（11）Angle It is 100-130 °.