Rice threshing device

Abstract

A rice threshing device comprises a drum screen device, a rice conveying device, a vibrating screen device, a first cyclone separation device, a rice thresher, a second cyclone separation device, and a straw recovery device. The drum screen device is provided with a first rice discharge port and a first debris discharge port. The vibrating screen device is provided with a second rice discharge port and a second debris discharge port. The second rice discharge port is connected to a feed port of a rice conveying device. The second debris discharge port is connected to a feed port of the first cyclone separation device. The first cyclone separation device is provided with a third rice discharge port and a third debris discharge port. The third debris discharge port is connected to a feed port of a straw recovery device. The third rice discharge port is connected to a feed port of the rice thresher. The second cyclone separation device is provided with a fourth rice discharge port and a fourth debris discharge port. The fourth rice discharge port is connected to a feed port of a rice conveying device. The fourth debris discharge port is connected to a feed port of a straw recovery device.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural product processing, in particular to a rice threshing device. Background Art

[0002] After rice matures, it is harvested by a harvester. The rice harvested by the harvester contains a lot of straw and rice ears that are not completely threshed. Before rice milling, the rice must be cleaned, mainly to remove the straw and rice leaves from the rice. The method used is to screen the rice, and the rice falls from the screen, and the straw is left on the screen. In addition to the straw, the rice ears that are not completely threshed will also be retained on the screen, and eventually the rice ears and straw will be cleared out as waste, resulting in a waste of rice. Since the proportion of rice ears containing rice in the waste is very small, if the waste is threshed twice, it will consume a lot of electricity and increase the cost of machine use. Especially for large-scale rice processing, if the screening time is long during screening, the energy consumption of the screen will increase and it will also take time; if the screening time is short, a lot of rice will be screened out with the waste. Rice mixed in the waste will also increase the power consumption of the thresher. Summary of the invention

[0003] In view of this, it is necessary to provide a high-efficiency and low-consumption rice threshing device suitable for large-scale rice processing.

[0004] A rice threshing device comprises a drum screen device, a rice conveying device, a vibrating screen device, a first cyclone separation device, a rice thresher, a second cyclone separation device, and a straw recovery device. The drum screen device is provided with a first rice discharge port and a first debris discharge port, the first rice discharge port is connected to a feed port of the rice conveying device, the first debris discharge port is connected to a feed port of the vibrating screen device, so as to further vibrate and screen the debris remaining after the initial screening. The vibrating screen device is provided with a second rice discharge port and a second debris discharge port, the second rice discharge port is connected to a feed port of the rice conveying device, the second debris discharge port is connected to a feed port of the first cyclone separation device, so as to separate the straw from the rice and the rice ears. For separation, the first cyclone separation device is provided with a third rice discharge port and a third debris discharge port, the third debris discharge port is connected with the feed port of the straw recovery device to recover the straw and dust, the third rice discharge port is connected with the feed port of the rice thresher to thresh the rice on the rice ears, the discharge port of the rice thresher is connected with the feed port of the second cyclone separation device to separate the rice ears removed from the rice, the second cyclone separation device is provided with a fourth rice discharge port and a fourth debris discharge port, the fourth rice discharge port is connected with the feed port of the rice conveying device, the fourth debris discharge port is connected with the feed port of the straw recovery device to transfer the rice ears removed from the rice to the straw recovery device.

[0005] Preferably, the drum screen device includes a first elevator, a drum screen body, and a first dust cover. The feed port of the first elevator is arranged at the bottom of the rice pile to facilitate lifting of the rice. The discharge port of the first elevator is at the feed port of the drum screen body to transfer the rice to the drum screen body for screening. The first dust cover covers the drum screen body. The first rice discharge port and the first debris discharge port are located at the lower end of the drum screen body.

[0006] Preferably, the vibrating screen device includes a second elevator, a vibrating screen body, and a second dust cover. The feed port of the second elevator is connected to the first debris discharge port. The discharge port of the second elevator is located above the vibrating screen body to further screen the debris remaining after the initial screening. The second dust cover covers the vibrating screen body, and the second rice discharge port and the second debris discharge port are located at the lower end of the vibrating screen body.

[0007] Preferably, the straw recovery device includes a fixed bracket, a collecting hopper, and several dust removal nets. The upper end of the fixed bracket is fixedly connected to the collecting hopper. The upper end of the collecting hopper is provided with several air outlets. The dust removal nets are arranged on the air outlets of the collecting hopper. A discharge port is arranged below the collecting hopper. A discharge valve is arranged on the discharge port to facilitate the control of the discharge of materials.

[0008] Preferably, the rice conveying device includes a barrel, a driving motor, and a screw conveying paddle. One end of the barrel is fixedly connected to the driving motor, and the rotating shaft of the driving motor is fixedly connected to the screw conveying paddle. The screw conveying paddle is located in the barrel. Three feed ports are set at the upper end of the barrel. The three feed ports of the barrel are respectively connected to the first rice discharge port, the second rice discharge port, and the third rice discharge port. A discharge port is set at the end of the barrel to discharge rice.

[0009] Beneficial effect: The rice threshing device of the present invention includes a drum screen device, a rice conveying device, a vibrating screen device, a first cyclone separation device, a rice thresher, a second cyclone separation device, and a straw recovery device. The harvested raw materials first enter the drum screen device for screening. The drum screen has low efficiency, but low power consumption. First, most of the rice is quickly separated from the raw materials by the drum screen. The separated rice consumes less energy per unit weight, and in the process of rapid screening, it is difficult for debris to be continuously squeezed and clog the screen. The remaining rice, together with the straw, rice leaves, rice ears, etc., enter the vibrating screen device. The efficiency of the vibrating screen is high, that is, the screening is relatively clean and the time consumed is short, but the power consumption is also high. At this time, the proportion of rice in the material is not high, and the overall weight of the material is relatively light, which can effectively reduce the power consumption of the vibrating screen. And under the action of vibration, straw and other debris will repeatedly float above the rice grains due to gravity, thereby speeding up screening. The debris screened by the vibrating screen mainly includes straw, rice leaves, rice ears and a trace amount of rice grains. After that, these debris enter the first cyclone separation device, which can separate the denser rice ears and rice grains from the lighter straw, rice leaves and empty rice grains. After separation, the rice ears and rice grains enter the thresher for threshing. Since it only contains rice ears and rice grains, threshing will be very efficient. The weight of the rice ears after threshing is relatively light, and very pure rice grains can be obtained after passing through the second cyclone separator. Although the entire processing process is long, the time for rice processing has not increased, because the time for each screening step has become shorter, and the rice obtained is also cleaner, and the waste contains almost no rice grains. While improving efficiency, the quality of the rice to be processed is also improved. At the same time, the step-by-step processing is more in line with the characteristics of the machine itself. While effectively utilizing its advantages, it avoids its shortcomings and makes the processing process more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of a rice threshing device of the present invention at a preferred angle.

[0011] Figure 2 It is a schematic structural diagram of the rice threshing device of the present invention from another preferred angle.

[0012] Figure 3 The present invention is a schematic structural diagram of a rice threshing device at another preferred angle.

[0013] Figure 4 for Figure 3 Schematic diagram of the local structure.

[0014] In the figure: a rice threshing device 10, a cylindrical screen device 20, a first rice discharge port 201, a first debris discharge port 202, a first elevator 203, a cylindrical screen body 204, a first dust cover 205, a rice conveying device 30, a vibrating screen device 40, a second rice discharge port 401, a second debris discharge port 402, a second elevator 403, a vibrating screen body 404, a second dust cover 405, a first cyclone separation device 50, a third rice discharge port 501, a third debris discharge port 502, a rice thresher 60, a second cyclone separation device 70, a fourth rice discharge port 701, a fourth debris discharge port 702, a straw recovery device 80, a fixed bracket 801, a collecting hopper 802, and a dust removal net 803. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Please see Figures 1 to 4 A rice threshing device 10 includes a drum screen device 20, a rice conveying device 30, a vibrating screen device 40, a first cyclone separation device 50, a rice thresher 60, a second cyclone separation device 70, and a straw recovery device 80. The drum screen device 20 is provided with a first rice discharge port 201 and a first debris discharge port 202. The first rice discharge port 201 is connected to a feed port of the rice conveying device 30, and the first debris discharge port 202 is connected to a feed port of the vibrating screen device 40 to further vibrate and screen the debris remaining after the initial screening. The vibrating screen device 40 is provided with a second rice discharge port 401 and a second debris discharge port 402. The second rice discharge port 401 is connected to a feed port of the rice conveying device 30, and the second debris discharge port 402 is connected to a feed port of the first cyclone separation device 50 to separate the straw and the waste. The rice grains and rice ears are separated, the first cyclone separation device 50 is provided with a third rice discharge port 501 and a third debris discharge port 502, the third debris discharge port 502 is connected to the feed port of the straw recovery device 80 to recover the straw and dust, the third rice discharge port 501 is connected to the feed port of the rice thresher 60 to thresh the rice on the rice ears, the discharge port of the rice thresher 60 is connected to the feed port of the second cyclone separation device 70 to separate the rice ears from the rice, the second cyclone separation device 70 is provided with a fourth rice discharge port 701 and a fourth debris discharge port 702, the fourth rice discharge port 701 is connected to the feed port of the rice conveying device 30, the fourth debris discharge port 702 is connected to the feed port of the straw recovery device 80 to transfer the rice ears from which the rice is removed to the straw recovery device 80.

[0017] Furthermore, the drum screen device 20 includes a first elevator 203, a drum screen body 204, and a first dust cover 205. The feed port of the first elevator 203 is arranged at the bottom of the rice pile to facilitate lifting of the rice. The discharge port of the first elevator 203 is at the feed port of the drum screen body 204 to transfer the rice to the drum screen body 204 for screening. The first dust cover 205 covers the drum screen body 204. The first rice discharge port 201 and the first debris discharge port 202 are located at the lower end of the drum screen body 204.

[0018] Furthermore, the vibrating screen device 40 includes a second elevator 403, a vibrating screen body 404, and a second dust cover 405. The feed port of the second elevator 403 is connected to the first debris discharge port 202. The discharge port of the second elevator 403 is located above the vibrating screen body 404 to further screen the debris remaining after the initial screening. The second dust cover 405 covers the vibrating screen body 404. The second rice discharge port 401 and the second debris discharge port 402 are located at the lower end of the vibrating screen body 404.

[0019] Furthermore, the straw recovery device 80 includes a fixed bracket 801, a collecting hopper 802, and a plurality of dust removal nets 803. The upper end of the fixed bracket 801 is fixedly connected to the collecting hopper 802. The upper end of the collecting hopper 802 is provided with a plurality of air outlets. The dust removal nets 803 are arranged on the air outlets of the collecting hopper 802. A discharge port is arranged below the collecting hopper 802, and a discharge valve is arranged on the discharge port to control the discharge of materials.

[0020] Furthermore, the rice conveying device 30 includes a barrel, a driving motor, and a screw conveying paddle. One end of the barrel is fixedly connected to the driving motor, and the rotating shaft of the driving motor is fixedly connected to the screw conveying paddle. The screw conveying paddle is located in the barrel. Three feed ports are set at the upper end of the barrel. The three feed ports of the barrel are respectively connected to the first rice discharge port 201, the second rice discharge port 401, and the third rice discharge port 501. A discharge port is set at the end of the barrel to discharge rice.

[0021] The ingredients of harvested rice raw materials include materials such as rice, undeveloped empty rice, rice ears, straw, rice leaves, dust, etc. In the past, when a single screening device was used for screening, problems such as screen blockage, low efficiency, and incomplete screening were prone to occur. After the rice raw materials enter the rice threshing device 10 of the present invention, the raw materials are first screened by a cylindrical screen quickly, and most of the rice in the raw materials are separated. The remaining rice and other sundries enter the vibrating screen for processing. Since the remaining material mass is lighter, the vibrating screen also does less work to overcome gravity during the vibration process, thereby consuming less energy. At the same time, since the overall material mass is lighter, it is also more conducive to the heavier rice being bumped to the bottom of the lighter material. In this way, the separation of rice will be more thorough, and it will also be more conducive to the empty rice staying in the sundries layer. At the same time, since the first cyclone separator 50 is followed by the vibrating screen device 40, and the cylindrical screen device 20, the vibrating screen device 40, and the first cyclone separator 50 are all connected, these empty rice, straw, and dust with low density will be sucked into the first cyclone separator 50, and finally enter the straw recovery device 80. In this way, it is more conducive to the separation of empty rice from normal rice. During the vibration of the vibrating screen, straw and other debris will be temporarily separated from rice, etc. The first cyclone separator 50 will provide a relatively negative pressure environment for the vibrating screen device 40, and the debris during separation will not be pressed by the rice, so it will enter the first cyclone separator 50 under the action of negative pressure, and thus be separated. Some rice may also enter the cyclone separator driven by negative pressure, but affected by the airflow in the cyclone separator, the rice will fall to the bottom of the first cyclone separator 50 and fall into the thresher. After running for a period of time, some straw and rice ears will remain on the vibrating screen. At this time, the wind force of the first cyclone separation device 50 can be appropriately adjusted so that the rice ears can also be sucked into the first cyclone separation device 50. The rice ears entering the first cyclone separation device 50 will also fall into the thresher under the influence of the airflow, and then the thresher will thresh them. In this way, the power consumed by the thresher is very small. The threshed rice ears and rice grains enter the second cyclone separation device 70 for separation, so that the rice grains are separated more thoroughly, and all the rice ears containing rice grains are processed at the same time, reducing the waste of rice grains.

[0022] That is, during the use of the present invention, the thresher can be used intermittently, and when the thresher has accumulated enough rice ears and rice grains, the thresher can be started again for threshing. In order to accumulate these rice ears and rice grains, a silo can be added above the thresher. The second cyclone separation device 70 is also used intermittently.

[0023] At the same time, in terms of processing time, the time for step-by-step processing of rice is not inferior to the time for single processing of rice. When the rice is processed step by step, the processing time of each screening device will be significantly shortened. For example, if the rice raw material is originally only screened by a cylindrical screen, then in order to screen thoroughly, it is necessary to force screening repeatedly. During the repeated screening process, straws, rice leaves, rice ears, etc. are easy to block the screen. Using the rice threshing device 10 of the present invention, it is not necessary to screen thoroughly with a cylindrical screen, and it is only necessary to use the cylindrical screen to screen most of the rice during the rotation process. According to the "80 / 20 rule", the time required for the cylindrical screen to screen the remaining rice may be equal to or even more than the time spent by most of the rice to be screened. This is caused by the structural characteristics of the cylindrical screen itself, and also by the properties of the material itself, such as the obstruction of large particles such as straws, rice leaves, and rice ears on rice during the rotation process, and the adhesion of rice leaves and rice ears to rice. These rice grains, together with the sundries, etc., enter the vibrating screen. The rice grains are separated from the rice leaves, rice ears, straws, etc. by the vibration. Under the action of gravity, the rice grains fall and are separated, and the rice leaves, rice ears, straws, etc. are finally subjected to the negative pressure wind force and enter the first cyclone separation device 50. At this time, the rice grains have been basically separated, but the existing rice ears have not been processed. Through the action of the first cyclone separation device 50, a trace amount of rice grains, rice ears, straws, and rice leaves are separated and enter the thresher. In addition to separating rice ears, the first cyclone separation device 50 can also reduce the separation time of rice grains in the vibrating screen. Because the negative pressure generated by the first cyclone separation device 50 can separate the straws, rice leaves, etc. from the rice grains faster, it is more conducive to improving the separation efficiency of the vibrating screen.

[0024] The rice threshing device 10 of the present invention is in a closed state throughout the whole process. The dust generated during the screening process and threshing will enter the straw recovery device 80 together with the straw and the threshed rice ears under the action of the cyclone separator, so that no dust will be generated in the entire operating space, thereby optimizing the working environment.

[0025] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A rice threshing device, characterized in that: The invention comprises a drum screen device, a rice conveying device, a vibrating screen device, a first cyclone separation device, a rice thresher, a second cyclone separation device and a straw recovery device. The drum screen device is provided with a first rice discharge port and a first debris discharge port. The first rice discharge port is connected with a feed port of the rice conveying device. The first debris discharge port is connected with a feed port of the vibrating screen device so as to further vibrate and screen the debris remaining after the initial screening. The vibrating screen device is provided with a second rice discharge port and a second debris discharge port. The second rice discharge port is connected with a feed port of the rice conveying device. The second debris discharge port is connected with a feed port of the first cyclone separation device so as to separate the straw from the rice and the rice ears. The first cyclone separation device is provided with a third rice discharge port and a third debris discharge port, the third debris discharge port is connected with the feed port of the straw recovery device to recover the straw and dust, the third rice discharge port is connected with the feed port of the rice thresher to thresh the rice on the rice ears, the discharge port of the rice thresher is connected with the feed port of the second cyclone separation device to separate the rice ears from the rice, the second cyclone separation device is provided with a fourth rice discharge port and a fourth debris discharge port, the fourth rice discharge port is connected with the feed port of the rice conveying device, the fourth debris discharge port is connected with the feed port of the straw recovery device to transfer the rice ears from which the rice is removed to the straw recovery device.

2. The rice threshing device according to claim 1, characterized in that: The drum screen device includes a first elevator, a drum screen body, and a first dust cover. The feed port of the first elevator is arranged at the bottom of the rice pile to facilitate lifting of the rice. The discharge port of the first elevator is located at the feed port of the drum screen body to transfer the rice to the drum screen body for screening. The first dust cover covers the drum screen body. The first rice discharge port and the first debris discharge port are located at the lower end of the drum screen body.

3. The rice threshing device according to claim 2, characterized in that: The vibrating screen device includes a second elevator, a vibrating screen body, and a second dust cover. The feed port of the second elevator is connected to the first debris discharge port. The discharge port of the second elevator is located above the vibrating screen body to further screen the debris remaining after the initial screening. The second dust cover covers the vibrating screen body. The second rice discharge port and the second debris discharge port are located at the lower end of the vibrating screen body.

4. The rice threshing device according to claim 3, characterized in that: The straw recovery device includes a fixed bracket, a collecting hopper, and several dust removal nets. The upper end of the fixed bracket is fixedly connected to the collecting hopper. The upper end of the collecting hopper is provided with several air outlets. The dust removal nets are arranged on the air outlets of the collecting hopper. A discharge port is arranged below the collecting hopper. A discharge valve is arranged on the discharge port to facilitate the control of the discharge of materials.

5. The rice threshing device according to claim 4, characterized in that: The rice conveying device includes a barrel, a driving motor, and a screw conveying paddle. One end of the barrel is fixedly connected to the driving motor, and the rotating shaft of the driving motor is fixedly connected to the screw conveying paddle. The screw conveying paddle is located in the barrel. Three feed ports are arranged at the upper end of the barrel. The three feed ports of the barrel are respectively connected to the first rice discharge port, the second rice discharge port, and the third rice discharge port. A discharge port is arranged at the end of the barrel to discharge rice.

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