Combined grain cleaning machine

Abstract

The application discloses a composite grain cleaning machine, and relates to the technical field of grain cleaning machines, wherein the composite grain cleaning machine comprises a first grain cleaning device and a second grain cleaning device, a grain passing channel is formed in the air selection grain cleaning device, the air selection grain cleaning device is used for air selection of grain flowing through the grain passing channel, and the electromagnetic grain cleaning device is used for electromagnetic cleaning of grain flowing through the first grain cleaning device. The air selection grain cleaning device and the electromagnetic grain cleaning device are used for primary screening of raw grain to remove light impurities and dust in the raw grain. The grain after the primary screening flows through the vibration screen of the second grain cleaning device to remove large impurities and small impurities in the grain. In this way, the impurities and magnetic substances in the grain are separated, and the quality of grain screening is improved.

Description

Technical Field

[0001] This invention relates to the field of grain cleaning machine technology, and in particular to a composite grain cleaning machine. Background Technology

[0002] Currently, grain cleaning machines are widely used in my country, and most of them use vibrating screens and fans to screen grains. However, the screening process generates a lot of dust, which affects workers and reduces the lifespan of the machines. Nowadays, related equipment has been combined to reduce dust. However, the screened materials still contain a lot of dust and impurities, and magnetic substances mixed in cannot be screened, which may interfere with the normal operation of the machines. Summary of the Invention

[0003] The main objective of this invention is to propose a composite grain cleaning machine, which aims to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention proposes a composite grain cleaner, comprising:

[0005] A first grain cleaning device includes an air-separation grain cleaning device and an electromagnetic grain cleaning device. The air-separation grain cleaning device has a grain passage channel formed within it. The air-separation grain cleaning device is used to perform air separation on the grain flowing through the grain passage channel. The electromagnetic grain cleaning device is used to perform electromagnetic cleaning on the grain flowing through the first grain cleaning device.

[0006] The second grain cleaning device includes a vibrating screen disposed below the first grain cleaning device to vibrate and screen the grain cleaned by the first grain cleaning device.

[0007] In one embodiment, two air-separated grain cleaning devices are provided, one of which is arranged in the front-to-back direction and the other in the left-to-right direction, and the electromagnetic grain cleaning device is arranged between the two air-separated grain cleaning devices.

[0008] In one embodiment, the electromagnetic grain cleaning device includes a support frame and an electromagnet disposed in the grain passage, wherein the support frame is fixed to one side of the grain passage.

[0009] In one embodiment, the electromagnet includes a cylinder and an electromagnetic rod. The electromagnetic rod is inserted into the cylinder, and a plurality of electromagnetic coil groups are movably sleeved on the outer surface of the electromagnetic rod along its length. Each electromagnetic coil group includes a multi-turn coil and two sliders. The two sliders are respectively disposed on both sides of the multi-turn coil, so that the spacing between the multi-turn coil can be changed by the movement of the two sliders.

[0010] In one embodiment, the electromagnetic grain cleaning device further includes a cleaning device, which includes a motor, a cleaning block, and a lead screw and a guide post extending along the length direction of the electromagnet. The output shaft of the motor is drivenly connected to the lead screw. The lead screw and the guide post are fixed on the support frame. The cleaning block has a slot corresponding to the length direction of the electromagnet to engage the electromagnet. The cleaning block has a threaded hole and a mounting hole along its length to connect the lead screw and the guide post respectively.

[0011] In one embodiment, a guide plate is provided above the electromagnet, the guide plate extends along the length of the electromagnet and has a protrusion in the middle, so that the grain falling from the grain outlet of the grain passage falls along both sides of the protrusion.

[0012] In one embodiment, the two air separation grain cleaning devices include a first air separation grain cleaning device located above the electromagnetic grain cleaning device. The first air separation grain cleaning device includes a first fan and a first impurity removal channel disposed on both sides of the grain passage.

[0013] In one embodiment, the two air-separation grain cleaning devices include a second air-separation grain cleaning device located below the electromagnetic grain cleaning device, comprising:

[0014] An upper and lower diffuser plate are spaced apart along a vertical direction, and the upper diffuser plate is inclined toward the lower diffuser plate in a downward direction; and,

[0015] A splitter drive device drives one of the upper splitter and the lower splitter to move one of them toward the other in the vertical direction.

[0016] In one embodiment, the splitter plate driving device includes a drive motor, a rotating shaft, and an eccentric mechanism. The motor is driven and connected to the rotating shaft, and the eccentric mechanism is rotatably mounted on the rotating shaft and abuts against the bottom surface of the lower splitter plate.

[0017] In one embodiment, the vibrating screen and the lower diversion plate are spaced apart. One end of the vibrating screen is inclined downward and is provided with a final grain outlet and an impurity outlet. The final grain outlet is provided with a detection device.

[0018] The technical solution of this invention employs an air-separation grain cleaning device and an electromagnetic grain cleaning device to screen the raw grain to remove light impurities and dust. The air-separation grain cleaning device has a grain passage channel, which is used to air-separate the grain flowing through the passage. The electromagnetic grain cleaning device is used to electromagnetically clean the grain flowing through the first grain cleaning device. The grain, after passing through the air-separation and magnetic grain cleaning devices, flows through the vibrating screen of the second grain cleaning device to vibrate and screen the grain after it has been cleaned by the first grain cleaning device, removing large and small impurities. This separates impurities and magnetic substances from the grain, improving the quality of grain screening. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a structure of an embodiment of the composite grain cleaner provided by the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the internal structure of the composite grain cleaner shown;

[0022] Figure 3 for Figure 1 The diagram shows the structure of the electromagnetic grain cleaning device in the composite grain cleaning machine.

[0023] Figure 4 for Figure 3 A schematic diagram of the electromagnet structure in the electromagnetic grain cleaning device shown.

[0024] Figure 5 for Figure 3 A schematic diagram of the electromagnetic rod in the electromagnetic grain cleaning device shown.

[0025] Figure 6 for Figure 3 The diagram shows the structure of the cleaning block in the electromagnetic grain cleaning device.

[0026] Figure 7 for Figure 1 A partial cross-sectional view of the first air separation cleaning device of the composite grain cleaner shown;

[0027] Figure 8 for Figure 1 A schematic diagram of the second air separation cleaning device of the composite grain cleaner shown;

[0028] Figure 9 for Figure 8 The diagram shows the structure of the lower diversion plate of the second air separation grain cleaning device.

[0029] Explanation of icon numbers:

[0030] 100. Compound grain cleaner; 1. First grain cleaning device; 11. First air-separation grain cleaning device; 111. First fan; 112. First impurity removal channel; 12. Electromagnetic grain cleaning device; 121. Electromagnet; 1211. Cylinder; 1212. Electromagnetic rod; 1213. Slider; 1214. Coil; 1211a. Groove; 122. Support frame; 123. Guide plate; 13. Cleaning device; 131. Motor; 132. Lead screw; 133. Guide column; 134. Cleaning block; 1341. Slot; 1341a. Protrusion 14. Second air separation grain cleaning device; 141. Upper diversion plate; 142. Lower diversion plate; 14a. Guide channel; 143. Second fan; 144. Second impurity removal channel; 145. Diversion plate drive device; 1451. Drive motor; 1452. Rotating shaft; 1453. Eccentric mechanism; 1454. Worm; 1455. Worm wheel; 146. Housing; 2. Second grain cleaning device; 21. Vibrating screen; 211. Final grain outlet; 212. Detection device; 3. Impurity suction device; 31. Dust collector; 32. Impurity suction pipe.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] Currently, grain cleaning machines are widely used in my country, and most of them use vibrating screens and fans to screen grains. However, the screening process generates a lot of dust, which affects workers and reduces the lifespan of the machines. Nowadays, related equipment has been combined to reduce dust. However, the screened materials still contain a lot of dust and impurities, and magnetic substances mixed in cannot be screened, which may interfere with the normal operation of the machines.

[0036] In view of this, the present invention proposes a composite grain cleaning machine.

[0037] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the composite grain cleaner 100 includes a first grain cleaning device 1 and a second grain cleaning device 2. The air-separated grain cleaning device forms a grain passage, which is used to air-separate the grain flowing through the grain passage. The electromagnetic grain cleaning device 12 is used to electromagnetically clean the grain flowing through the first grain cleaning device 1. The second grain cleaning device 2 includes a vibrating screen 21 disposed below the first grain cleaning device 1 to vibrate and screen the grain cleaned by the first grain cleaning device 1.

[0038] Specifically, the present invention does not limit the specific form of the first grain cleaning device 1. For example, the air separation device and the electromagnetic grain cleaning device 12 can be integrated or independently arranged, as long as they have interconnected upper and lower grain passages. The air separation grain cleaning device can be one or multiple. Of course, the present invention does not limit the specific position of the air separation device and the electromagnetic grain cleaning device 12. The air separation grain cleaning device can be located above the electromagnetic grain cleaning device 12, or below the electromagnetic grain cleaning device 12, or it can be located in the grain passage in the middle of multiple air separation devices. That is, the raw grain can be air separated first and then magnetically separated, or it can be magnetically separated first and then air separated.

[0039] The raw grain collected from the drying yard needs to be screened because it contains dust, magnetic impurities, shriveled grains and other impurities. After passing through the wind separation and magnetic separation devices, the grain removes dust, light impurities and magnetic impurities. Then, it passes through the vibrating screen 21 of the second grain cleaning device 2 to further remove large impurities and heavy impurities. Through layer-by-layer screening, impurities and magnetic substances in the grain are screened out, improving the quality of grain screening.

[0040] In an embodiment of the present invention, two air-separation grain cleaning devices are provided, one of which is arranged in a front-to-back direction and the other in a left-to-right direction. The electromagnetic grain cleaning device 12 is arranged between the two air-separation grain cleaning devices. In this way, as the grain falls, it first passes through the preliminary screening of the preceding air-separation grain cleaning device to remove some dust and impurities. The heavier magnetic substances are then further removed by the magnetic separation device. Finally, it passes through the lower air-separation device to further remove lighter impurities. The electromagnetic grain cleaning device 12, located between the two air-separation grain cleaning devices, not only improves the quality of grain screening but also has a more reasonable spatial layout. In addition, the two air-separation grain cleaning devices are arranged in intersecting directions, which can perform air separation on the falling grain from different directions, further improving the screening efficiency and quality.

[0041] Further, please refer to Figure 3The electromagnetic grain cleaning device 12 includes a support frame 122 and an electromagnet 121 disposed in the grain passage. The support frame 122 is fixed to one side of the grain passage. Specifically, the front and rear sides of the electromagnet 121 are arranged in the middle of the grain passage so that the grain can flow through the front and rear sides of the electromagnet 121 during the falling process. Since the electromagnet 121 can adsorb magnetic impurities in the grain on both the front and rear sides, the electromagnet 121 is provided with corona electrodes at intervals on both the front and rear sides. The corona electrodes are connected to the negative terminal of the power supply to ionize the surrounding gas, thereby generating electricity and charging the dust particles. The electromagnet 121 is connected to the positive terminal of the power supply, so the negatively charged dust particles move towards the electromagnet 121 and are adsorbed on the surface of the electromagnet 121, thus achieving efficient dust removal.

[0042] Please see Figure 4 and Figure 5 When grain falls through the grain passage, vibrations from the machine may cause a greater amount of grain to be distributed in the middle and less in the sides. To adapt to different working conditions, the adsorption efficiency of the electromagnet 121 at different parts along its length is adjusted. Therefore, the electromagnet 121 includes a cylinder 1211 and an electromagnetic rod 1212. The electromagnetic rod 1212 is inserted into the cylinder 1211. Multiple electromagnetic coil groups are movably sleeved on the outer surface of the electromagnetic rod 1212 along its length. Each electromagnetic coil group includes a multi-turn coil 1214 and two sliders 1213. The two sliders 1213 are located on both sides of the multi-turn coil 1214, so that the spacing between the multi-turn coil 1214 can be changed by the movement of the two sliders 1213. Specifically, the two sliders 1213 are respectively connected to the two ends of the multi-turn electromagnetic coil 1214. When a large amount of grain falls from the grain passage and is distributed in the middle, the sliders 1213 on both sides of the coil 1214 in the middle part of the electromagnetic rod 1212 are moved closer to each other. This reduces the gap between the coils 1214 in the middle part and increases the distribution density of the coils 1214, thus increasing the current and achieving a better adsorption effect. It can be understood that when a large amount of grain falls on one side of the grain passage, the sliders 1213 can be adjusted to move towards that side, causing the coils 1214 to move to the corresponding side. This changes the position of the coil 1214, resulting in a better adsorption effect at the corresponding part. In addition, if less grain passes through one side of the grain passage, the slider 1213 can be adjusted to move away from each other to reduce the density of the coil 1214. To further improve the adsorption effect, the outer periphery of the cylinder 1211 is provided with multiple grooves 1211a at intervals along its axial direction to better accommodate dust and other impurities in the grain. It should be noted that the present invention does not limit the installation form of the slider 1213. For example, the outer periphery of the electromagnetic rod 1212 can be provided with a slide rail corresponding to the sliding of the slider 1213.

[0043] Please see Figure 3 and Figure 6 When the electromagnet 121 of the electromagnetic grain cleaning device 12 accumulates a certain amount of impurities, it needs to be stopped for cleaning. At this time, the power is cut off, allowing the adsorbed dust particles to lose their charge and thus some of them to fall off. To further enhance the dust removal effect, the electromagnetic grain cleaning device 12 is also equipped with a cleaning device 13. The cleaning device 13 includes a motor 131, a cleaning block 134, and a lead screw 132 and a guide post 133 extending along the length of the electromagnet 121. The output shaft of the motor 131 is driven by the lead screw 132. The lead screw 132 and the guide post 133 are fixed to the support frame 122. The cleaning block 134 has a slot 1341 corresponding to its length to engage the electromagnet 121. To avoid cleaning dead spots, the inner side of the slot 1341 has a protruding strip 1341a corresponding to the groove, which also guides the movement of the cleaning block 134. The cleaning block 134 has threaded holes along its length. The motor 131 is fixed to the support frame 122. When the equipment is stopped for maintenance, the motor 131 is started. The output shaft of the motor 131 drives the lead screw 132 to rotate, thereby driving the cleaning block 134 to move along the length of the electromagnet 121 to remove magnetic impurities from the electromagnet 121. In order to control the flow rate on the front and rear sides of the electromagnet 121, two electromagnets 121 are set. The two electromagnets 121 are set at intervals to reduce the weight of the equipment. Correspondingly, the cleaning block 134 is provided with two slots to respectively engage the two electromagnets 121. This makes the gap between the front and rear sides of the electromagnet 121 and the sides of the grain passage more reasonable, so as to make the adsorption more thorough. In addition, it can be understood that in order to improve the stability of the cleaning block 134 during operation, two guide columns 133 are provided and are respectively spaced on both sides of the lead screw 132.

[0044] To better control the grain falling from both sides of electromagnet 121, please refer to... Figure 2 A guide plate 123 is provided above the electromagnet 121. The guide plate 123 extends along the length of the electromagnet 121. It can be understood that the guide plate 123 is located in the grain passage and has a protrusion in the middle, so that the grain falling from the grain outlet of the grain passage falls along both sides of the protrusion. This allows both sides of the electromagnet 121 to contact the grain, increasing the working area.

[0045] Please see Figure 7In an embodiment of the present invention, the two air-separation grain cleaning devices include a first air-separation grain cleaning device 11 located above the electromagnetic grain cleaning device 12. The first air-separation grain cleaning device 11 includes a first fan 111 and a first impurity removal channel 112 respectively disposed on both sides of the grain passage. Specifically, in this embodiment, the first air-separation grain cleaning device 11 is arranged in a left-right direction as an example. In order to reduce dust at the inlet of the raw grain entering the first air-separation grain cleaning device 11, the first air-separation grain cleaning device 11 is provided with a grain inlet box. The upper side is provided with a cover plate to seal the grain inlet box, and the cavity of the grain inlet box forms the grain passage. The raw grain enters through the front or rear side of the grain inlet box to reduce dust from escaping from the grain inlet box. The left and right sides of the grain inlet box are respectively provided with a first fan 111 and a first impurity removal channel 112. The air outlet of the first fan 111 is arranged opposite to the impurity removal channel so that the dust in the grain falls into the first impurity removal channel 112. In order to facilitate the collection of dust and other impurities, the cross-section of the first impurity removal channel 112 is gradually reduced from top to bottom.

[0046] Please see Figure 8 and Figure 9, in order to further enhance the effect of winnowing, the two winnowing and cleaning devices include a second winnowing and cleaning device 14 located below the electromagnetic cleaning device 12. The second winnowing and cleaning device 14 includes an upper shunt plate 141, a lower shunt plate 142, and a shunt plate driving device 145. The upper shunt plate 141 and the lower shunt plate 142 are arranged at intervals in the vertical direction and in the direction from top to bottom, and the upper shunt plate 141 is inclined towards the lower shunt plate 142. Specifically, the second winnowing and cleaning device 14 includes a housing 146, and the inner cavity of the housing 146 forms the grain passing channel. The upper shunt plate 141 and the lower shunt plate 142 are arranged in the grain passing channel and extend in the front-back direction. The fixed ends of the upper shunt plate 141 and the lower shunt plate 142 are rotatably installed on the housing 146. In order to prevent grains from slipping off the sides of the upper shunt plate 141 and the lower shunt plate 142, resulting in incomplete screening, in the embodiments of the present invention, the left and right sides of the upper shunt plate 141 and the lower shunt plate 142 are formed with retaining edges; further, a plurality of diversion grooves 14a are also provided on the upper shunt plate 141 and the lower shunt plate 142. The plurality of diversion grooves 14a are arranged at intervals. The present invention does not limit the specific form of the diversion grooves 14a. For example, they can be arranged in a "return" shape or in a "human" shape. In the embodiments of the present invention, the diversion grooves 14a of the upper shunt plate 141 and the lower shunt plate 142 are bent in the front-back direction and are arranged in a "human" shape. The height of the diversion grooves 14a is 3 - 5 cm. According to the stacking angle test, it is verified that the stacking height of grains is 15 mm. Due to different types of raw grains, considering the increase in the inclined surface stacking angle, the height of the diversion grooves 14a is set at 3 - 5 cm. At this time, the raw grains can smoothly flow down along the diversion grooves 14a, and it can be ensured that grains can fall from the diversion grooves 14a in the middle shunt part. In this way, when the grains fall onto the upper shunt plate 141 and the lower shunt plate 142, the diversion grooves 14a divert the grains and then the grains uniformly fall along the diversion grooves 14a, avoiding the accumulation of grains on the shunt plate; the shunt plate driving device 145 is drivingly connected to one of the upper shunt plate 141 and the lower shunt plate 142 to drive one of them to move towards the other in the vertical direction, so as to change the relative inclination angle between the upper shunt plate 141 and the lower shunt plate 142. In the embodiments of the present invention, the specific form of the shunt plate driving device 145 is not limited. For example, a cylinder can be arranged in the vertical direction at the free end of the upper shunt plate 141 or the free end of the lower shunt plate 142 to drive the free end to move up and down, or an eccentric mechanism 1453 can be arranged for driving.

[0047] It should be noted that the second air separation grain cleaning device 14 is also provided with a second fan 143 and a second impurity removal channel 144. The air outlet of the second fan 143 and the second impurity removal channel 144 are respectively located in the grain passage below the free end of the lower diversion plate 142 and are arranged in a front-to-back manner. In order to facilitate the collection of impurities, the cross-section of the second impurity removal channel 144 is set to gradually decrease along the direction from the inlet to the outlet. This allows the air outlet to more fully blow the light impurities in the falling grain into the second impurity removal channel 144 in the left-right direction.

[0048] Please continue reading. Figure 8 The specific form of the diverter drive device 145 is also part of this invention. The diverter drive device 145 includes a drive motor 1451, a rotating shaft 1452, and an eccentric mechanism 1453. The rotating shaft 1452 is located on the lower side of the lower diverter 142 and fixed to both sides of the housing 146. The eccentric mechanism 1453 is rotatably mounted on the rotating shaft 1452 and abuts against the free end of the lower diverter 142. Specifically, this invention does not limit the specific form of the eccentric mechanism 1453; for example, it can be an eccentric disc or a cam. In an embodiment of this invention, the eccentric mechanism 1453 is a cam. A reducer is also connected between the drive motor 1451 and the rotating shaft 1452. The reducer includes mutually... A worm gear 1455 and a worm 1454 are meshed together. The worm 1454 is connected to the output shaft of the drive motor 1451 via a coupling. The worm gear 1455 and the rotating shaft 1452 are fixedly connected. The drive motor 131 drives the worm 1454 to rotate, which in turn drives the worm gear 1455 and the rotating shaft 1452 to rotate. The cam rotates to move the free end of the lower diverter plate 142 up and down, thereby changing the inclination of the lower diverter plate 142 relative to the upper diverter plate 141, thus changing the flow rate of the lower diverter plate 142. Specifically, when the free end of the lower diverter plate 142 moves upward, the flow rate decreases; conversely, when the free end of the lower diverter plate 142 moves downward, the flow rate increases.

[0049] Furthermore, considering that the flow rate is small when the diversion plate inclination angle is small, the efficiency of the second air separation grain cleaning device 14 is low, and it will also cause the raw grain to accumulate. When the diversion plate inclination angle gradually increases, the flow rate increases, causing the raw grain to be unable to flow from the upper diversion plate 141 to the lower diversion plate 142 during the falling process, and the guide groove 14a on the lower diversion plate 142 also cannot play a role. The raw grain falls directly from the middle diversion position, and the middle diversion situation cannot be achieved. The screening effect will have a downward trend. Therefore, in order to more accurately control the speed of grain falling, the inclination angle of the diversion plate is limited. In the embodiment of the present invention, the diversion plate adjustment angle is set to 30°~60°.

[0050] Further, please refer to Figure 2 The vibrating screen 21 and the lower diversion plate 142 are spaced apart along the vertical direction. One end of the vibrating screen 21 is inclined downwards and has a final grain outlet 211 and an impurity outlet. The vibrating screen 21 is configured to allow grain to fall while large impurities remain on it. In an embodiment of the present invention, the vibrating screen is configured in two layers: an upper vibrating screen for allowing grain and small impurities to fall while large impurities remain on it, and a lower vibrating screen for allowing small impurities to fall while grain remains on it. The final grain outlet 211... 1. A detection device 212 is provided. The present invention does not limit the specific form of the detection device 212. In this embodiment, the detection device 212 includes an imaging element for observing the screening of impurities in the final grain. Specifically, when there are many impurities in the final grain, the flow rate of the lower diversion plate 142 can be adjusted to a smaller flow rate, that is, the free end can be adjusted upward. Conversely, when there are few impurities in the final grain, the flow rate of the lower diversion plate 142 can be adjusted to a larger flow rate, that is, the free end can be adjusted downward. On the other hand, the air volume of the first fan 111 and the second fan 143 is adjusted at the same time to improve the screening effect.

[0051] In addition, to facilitate the collection of impurities, the composite grain cleaner 100 is also equipped with a suction device 3. The suction device 3 includes a dust collector 31 and a suction pipe 32. The suction pipe 32 connects the first impurity removal pipe and the second impurity removal pipe and is connected to the dust collector 31. It should be noted that the specific form of the dust collector 31 is not limited here. In the embodiments of the present invention, a cyclone dust collector 31 is preferred. In this way, the gas containing impurities enters the cyclone dust collector 31 and rotates downward along the cavity. Due to the effect of rotational inertia, the particles are separated when they reach the bottom and fall to the bottom. The filtered gas is discharged through the exhaust pipe of the cyclone dust collector 31, reducing dust pollution to the environment.

[0052] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A combined grain cleaner, characterized in that, The utility model relates to a grain cleaning device, including: A first grain cleaning device includes a winnowing grain cleaning device and an electromagnetic grain cleaning device, a through channel is formed in the winnowing grain cleaning device, the winnowing grain cleaning device is used for winnowing grain flowing through the through channel, and the electromagnetic grain cleaning device is used for electromagnetically cleaning grain flowing through the first grain cleaning device. A second grain cleaning device includes a vibrating screen arranged below the first grain cleaning device to vibrate and screen grain cleaned by the first grain cleaning device. The winnowing grain cleaning device is arranged in the front-back direction, and the electromagnetic grain cleaning device is arranged between the two winnowing grain cleaning devices. The electromagnetic grain cleaning device includes a support frame and an electromagnet arranged in the through channel, and the support frame is fixed to one side of the through channel. The electromagnet includes a cylinder and an electromagnetic rod, the electromagnetic rod is inserted into the cylinder, a plurality of electromagnetic coil groups are movably arranged on the outer surface of the electromagnetic rod along the length direction of the electromagnetic rod, each electromagnetic coil group includes a multi-turn coil and two sliders, and the two sliders are arranged on both sides of the multi-turn coil to change the distance between the multi-turn coil when the two sliders move. The electromagnetic grain cleaning device further includes a cleaning device, the cleaning device includes a motor, a cleaning block, a lead screw and a guide column extending along the length direction of the electromagnet, the output shaft of the motor is drivingly connected with the lead screw, the lead screw and the guide column are fixed to the support frame, the cleaning block is provided with a clamping groove corresponding to the length direction of the electromagnet to clamp the electromagnet, and the cleaning block is provided with a threaded hole and a mounting hole along the length direction to respectively connect the lead screw and the guide column.

2. The combined grain cleaner according to claim 1, wherein A guide plate is arranged above the electromagnet, the guide plate extends along the length direction of the electromagnet, and a protrusion is formed in the middle of the guide plate to make the grain falling from the grain outlet of the through channel fall along both sides of the protrusion.

3. The combined grain cleaner as claimed in claim 1, wherein The two winnowing grain cleaning devices include a first winnowing grain cleaning device arranged above the electromagnetic grain cleaning device, the first winnowing grain cleaning device includes a first fan and a first impurity removal channel arranged on both sides of the through channel.

4. The combined grain cleaner according to claim 1, wherein The two winnowing grain cleaning devices include a second winnowing grain cleaning device arranged below the electromagnetic grain cleaning device, including: An upper layer shunt plate and a lower layer shunt plate are arranged in the up-down direction, and the upper layer shunt plate is arranged obliquely towards the lower layer shunt plate in the direction from top to bottom. A shunt plate driving device is drivingly connected with one of the upper layer shunt plate and the lower layer shunt plate to drive one of them to move towards the other in the up-down direction.

5. The combined grain cleaner according to claim 4, wherein The shunt plate driving device includes a driving motor, a rotating shaft and an eccentric mechanism, the motor is drivingly connected with the rotating shaft, and the eccentric mechanism is rotatably arranged on the rotating shaft and abuts against the lower bottom surface of the lower layer shunt plate.

6. The combined grain cleaner according to claim 4, wherein The vibrating screen is arranged in the up-down direction, one end of the vibrating screen is arranged obliquely downwards, and the vibrating screen is provided with a finished grain outlet and an impurity outlet, and the finished grain outlet is provided with a detection device.

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