Rice screening device

Abstract

The invention relates to the technical field of rice pre-processing equipment, and specifically to a rice screening device, which blows air along the axial direction of a screening channel to blow away light impurities, screens the rice through the sieve holes, and obliquely discharges the rice through a discharging channel. As the material is screened in the screening channel, the drum rotates continuously, and the rice is scraped by an inclined plate to make part of the rice flow along a fixed gap. As a result, the rice will not accumulate at the bottom end of the fixed drum where the material is fed, but will be scraped by the inclined plate and scattered at a larger angle. Moreover, since the diameter of large particle impurities in the rice is larger than the fixed gap, they will be scraped by the inclined plate and will not fall into the drum along the leakage hole until they are brought to the top end of the fixed drum. They will not stay in the screening channel and accumulate with the feed to affect the screening efficiency. Thus, the problem of low screening efficiency of rice in the pre-cleaning stage is solved.

Description

Technical Field

[0001] The invention relates to the technical field of rice pre-processing equipment, in particular to a rice screening device. Background Art

[0002] During the processing of rice, it generally needs to go through the steps of pre-cleaning, hulling, hulling, and fine screening to finally produce rice. Among them, pre-cleaning mainly involves first screening and removing a certain amount of various impurities mixed in the rice, such as light impurities such as shriveled rice and rice husks, as well as heavy impurities such as stones and mud. Of course, larger impurities such as rice stalks and weeds are removed at the feed end by manual picking or controlling the size of the feed port. For the screening of rice in the pre-cleaning stage, in the prior art, for example, a rice screening and processing device disclosed in Chinese patent document CN113019916A solves the problem that traditional screening devices cannot remove fine dust and debris by setting a blower, a transmission pipe and a collection box. The problem of being unable to separate full rice grains from shriveled rice grains was solved by setting a first vibrating screen and a second vibrating screen, so that the second vibrating screen can screen out full rice grains, and the second vibrating screen is convenient for disassembly, replacement and removal of full rice grains, that is, the pre-cleaning operation is achieved by means of air separation and vibration screening. However, the inventors found that in the method of combining air separation and vibration screening similar to that disclosed in CN113019916A, the feed end needs to control the dispersion of materials, otherwise the materials will be concentrated at the feed end of the vibrating screen, and even under the action of vibration, the problem of material accumulation will still occur, which will affect the screening efficiency, and heavy impurities will always be mixed with the feed and cannot be separated synchronously, which will further cause material accumulation and affect the screening efficiency. Summary of the Invention

[0003] In view of this, the object of the present invention is to provide a rice screening device to solve the problem of low screening efficiency of rice in the pre-cleaning stage in the prior art.

[0004] Based on the above purpose, the present invention provides a rice screening device, including a screening machine body, a feed hopper is provided on the top of the screening machine body, and further comprising:

[0005] The screening drum is tilted and installed in the screening machine body;

[0006] The fixed cylinder is arranged in the screening cylinder, and an annular discharge channel is formed between the fixed cylinder and the screening cylinder. The bottom end of the fixed cylinder is provided with a screening hole;

[0007] The rotating drum rotates inside the fixed drum, and an annular screening channel is formed between the rotating drum and the fixed drum. The rice enters the screening channel from the feed hopper, and air is blown along the axial direction of the screening channel to blow away light impurities. The rice is screened by the sieve holes and discharged obliquely through the discharge channel.

[0008] There are leakage holes on the outer side ends of the rotating drum, and inclined plates are arranged at intervals on the outer periphery of the rotating drum. The inclined plates are inclined in the opposite direction of the rotation direction of the rotating drum. A fixed gap is left between the end of the inclined plate away from the rotating drum and the fixed drum. When the rotating drum rotates, the inclined plate scrapes the rice so that part of the rice flows along the fixed gap. Large particles of impurities are scraped by the inclined plate until they are brought to the top of the fixed drum and fall into the rotating drum along the leakage holes.

[0009] Preferably, the screening drum, the fixed drum and the rotating drum are all coaxially designed.

[0010] Preferably, a flip cover is connected to the leakage hole for unidirectional rotation. When the flip cover rotates to the top of the drum, it rotates inward unidirectionally under its own gravity to open the leakage hole. When the flip cover rotates to the bottom of the drum, it rotates downward to reset and close the leakage hole.

[0011] Preferably, the sieve holes are simultaneously opened on each inclined plate.

[0012] Preferably, the screening drum is rotatably connected to the screening machine body, and a plurality of material receiving troughs are circumferentially arranged on the inner wall of the screening drum. Vertical partitions are erected in the material receiving troughs, which divide the material receiving trough into a left material chamber and a right material chamber. A cover is slidably connected to the top of the material receiving trough. When the material receiving trough rotates downward, the cover slides under the action of its own gravity to close the left material chamber. When the material receiving trough rotates upward, the cover slides under the action of its own gravity to close the right material chamber. Part of the rice is transported along the material receiving trough and scattered in the discharge channel.

[0013] Preferably, the end of the receiving trough facing the fixed cylinder is open

[0014] Preferably, a pressure detector is provided in the receiving trough for detecting the weight of the rice in the receiving trough. When the pressure detected by the pressure detector is less than a preset value, the air volume in the screening channel is triggered to increase.

[0015] Preferably, a contact switch is provided on the sealing cover, and when the sealing cover completely closes the right material chamber, the contact switch triggers the corresponding pressure detector to start detection.

[0016] Preferably, one end of the screening machine body is fixedly connected to a feed end plate, and the other end is fixedly connected to a discharge end plate, both ends of the screening drum are rotatably connected to the feed end plate and the discharge end plate, both ends of the rotating drum are rotatably connected to the feed end plate and the discharge end plate, and both ends of the fixed drum are fixedly connected to the feed end plate and the discharge end plate, one end of the screening drum is passed through the discharge end plate and the discharge end plate, and is connected to an inner gear ring, one end of the rotating drum is passed through the discharge end plate and is connected to an outer gear ring, and a transmission gear is meshed between the inner and outer gear rings, one side of the transmission gear is fixedly connected to a main gear, one end of the main gear passes through the screening machine body, and is drivingly connected to the large gear device on the outside of the screening machine body.

[0017] Preferably, the discharge end plate is located at the lower end of the drum, the lower end of the screening channel, and the lower end of the discharge channel are respectively connected to the discharge pipe.

[0018] The beneficial effects of the present invention are as follows: the rice enters the screening channel from the feed hopper, and air is blown along the axial direction of the screening channel to blow away light impurities, and the light impurities are discharged obliquely along the screening channel. The rice is screened by the sieve holes and discharged obliquely through the discharging channel. At the same time, leakage holes are opened on the outer peripheral side ends of the rotating drum, and inclined plates are arranged at intervals on the outer periphery of the rotating drum. A fixed gap is left between the end of the inclined plate away from the rotating drum and the fixed drum, so that as the material in the screening channel is screened, the rotating drum continues to rotate and the rice is scraped by the inclined plate, so that part of the rice flows along the fixed gap. In this way, the rice will not be concentrated and accumulated at the bottom end of the fixed drum for feeding, but will be scraped by the inclined plate and scattered at a larger angle. Moreover, large particles of impurities in the rice will fall into the rotating drum along the leakage holes after being scraped by the inclined plate because their diameter is larger than the fixed gap, and will not be detained in the screening channel and accumulate with the feed to affect the screening efficiency. Therefore, the problem of low screening efficiency of rice in the pre-cleaning stage is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the screening drum, fixed drum and rotating drum of the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified schematic diagram of point A in the middle;

[0023] Figure 4 It is a side view structural diagram of the screening drum, fixed drum and rotating drum of the present invention;

[0024] Figure 5 It is a schematic diagram of the lateral structure of the inclined plate and the material receiving trough of the present invention;

[0025] Figure 6 For the present invention Figure 5 A magnified schematic diagram of point B in the middle;

[0026] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of point C in the middle;

[0027] Figure 8 For the present invention Figure 5 The enlarged schematic diagram of point D in the middle;

[0028] The arrow in the figure indicates the direction of rotation of the drum.

[0029] The following are marked in the figure:

[0030] 1. Screening machine body; 2. Feed hopper; 3. Screening drum; 4. Fixed drum; 41. Sieve holes; 5. Discharge channel; 6. Rotating drum; 61. Leakage hole; 62. Flip cover; 7. Screening channel; 8. Inclined plate; 9. Fixed gap; 10. Receiving trough; 101. Left material chamber; 102. Right material chamber; 11. Vertical partition; 12. Sealing cover; 13. Contact switch; 14. Sliding sleeve; 15. Limiting head; 16. Feed end plate; 17. Discharge end plate; 18. Inner gear ring; 19. Outer gear ring; 20. Transmission gear; 21. Main gear; 22. Large gear unit; 23. Discharge pipe. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] like Figures 1 to 8As shown, a rice screening device includes a screening machine body 1, a feed hopper 2 is provided at the top of the screening machine body 1, a screening drum 3 is tiltedly provided in the screening machine body 1, a fixed drum 4 is provided in the screening drum 3, an annular discharge channel 5 is formed between the fixed drum 4 and the screening drum 3, a sieve hole 41 is opened at the bottom end of the fixed drum 4, a rotating drum 6 is provided in the fixed drum 4, an annular screening channel 7 is formed between the rotating drum 6 and the fixed drum 4, rice enters the screening channel 7 from the feed hopper 2, and air is blown along the axial direction of the screening channel 7 to blow away light impurities The rice is screened by the sieve holes 41 and discharged at an angle through the discharge channel 5. Leakage holes 61 are opened on the outer side ends of the rotating drum 6. Inclined plates 8 are arranged at intervals on the outer periphery of the rotating drum 6. The inclined plates 8 are arranged at an angle in the opposite direction of the rotation direction of the rotating drum 6. A fixed gap 9 is left between the end of the inclined plate 8 away from the rotating drum 6 and the fixed drum 4. When the rotating drum 6 rotates, the rice is scraped by the inclined plate 8 so that part of the rice flows along the fixed gap 9. Large particles of impurities are scraped by the inclined plate 8 until they are brought to the top of the fixed drum 4 and fall into the rotating drum 6 along the leakage holes 61.

[0034] The present invention is provided with a screening machine body 1, a feed hopper 2 at the top of the screening machine body 1, and a screening drum 3 obliquely arranged in the screening machine body 1. In particular, a fixed drum 4 is provided in the screening drum 3, and an annular discharge channel 5 is formed between the fixed drum 4 and the screening drum 3. A sieve hole 41 is provided at the bottom end of the fixed drum 4. A rotating drum 6 is rotatably provided in the fixed drum 4, and an annular screening channel 7 is formed between the rotating drum 6 and the fixed drum 4, so that rice enters the screening channel 7 from the feed hopper 2, and air is blown along the axial direction of the screening channel 7 to blow away light impurities. Light impurities such as shrunken rice and rice husks are discharged obliquely along the screening channel 7 with the air blowing. The rice is screened by the sieve hole 41 and discharged obliquely through the discharge channel 5. At the same time, a leakage hole 61 is provided on the outer side end of the rotating drum 6, and inclined plates 8 are provided at intervals on the outer periphery of the rotating drum 6, and the inclined plates 8 are inclined in the opposite direction of the rotation direction of the rotating drum 6. The sloping plate 8 is scraped by the sloping plate 8 and the fixed cylinder 4, and a fixed gap 9 is left between the end of the sloping plate 8 away from the rotating drum 6 and the fixed cylinder 4. As the material in the screening channel 7 is screened, the rotating drum 6 continues to rotate and scrapes the rice through the sloping plate 8, so that part of the rice flows along the fixed gap 9. As a result, the rice will not be concentrated at the bottom end of the fixed cylinder 4 where the feed is fixed and accumulated, but will be scraped by the sloping plate 8 and scattered at a larger angle, that is, part of the rice scraped upward will slide down along the inclined plate surface of the sloping plate 8 and then flow down along the fixed gap 9, which has a good scattering screening effect. Moreover, large particles of impurities in the rice, such as stones and mud, are scraped by the sloping plate 8 and are brought to the top end of the fixed cylinder 4, and then fall into the rotating drum 6 along the leakage hole 61, and will not be detained in the screening channel 7 and accumulated with the feed to affect the screening efficiency. Thus, the problem of low screening efficiency of rice in the pre-cleaning stage is solved.

[0035] In an embodiment of the present invention, Figures 1 to 8 As shown, the screening drum 3, the fixed drum 4 and the rotating drum 6 are all coaxially designed.

[0036] In an embodiment of the present invention, Figures 1 to 8 As shown, the leakage hole 61 is connected to a flip cover 62 for unidirectional rotation, that is, the flip cover 62 is either in a state of rotating to close the leakage hole 61, or in a state of unidirectional rotation toward the inside of the rotating drum 6. The flip cover 62 rotates together with the rotating drum 6. When it reaches the top of the rotating drum 6, it is acted on by its own gravity and rotates inward in a unidirectional direction to open the leakage hole 61, so that large particles of impurities are scraped by the inclined plate 8 and brought to the top of the fixed drum 4, and fall into the rotating drum 6 along the opened leakage hole 61. When the flip cover 62 gradually rotates to the bottom of the rotating drum 6, it is acted on by its own gravity and rotates downward to reset to close the leakage hole 61, ensuring that most of the large particles of impurities fall into the rotating drum 6 from the leakage hole 61 at the top, are retained and discharged along the inclined rotating drum 6.

[0037] In an embodiment of the present invention, Figures 1 to 8 As shown, the sieve holes 41 are simultaneously opened on each inclined plate 8, so that when part of the rice is scraped by the inclined plate 8, it slides down along the inclined plate surface of the inclined plate 8, part falls along the sieve holes 41 on the inclined plate 8, and part flows down along the fixed gap 9, showing a more efficient and greater degree of scattering, avoiding the situation when more material is fed, that the rice does not have time to flow down from the fixed gap 9, but falls into the leakage hole 61 opened at the top along the inclined plate 8.

[0038] In an embodiment of the present invention, Figures 1 to 8 As shown, the screening drum 3 is rotatably connected to the screening machine body 1, and a plurality of receiving grooves 10 are arranged on the inner wall of the screening drum 3 in the circumferential direction. A vertical partition 11 is provided in the receiving groove 10, and the vertical partition 11 divides the receiving groove 10 into a left material chamber 101 and a right material chamber 102. The rice that falls after screening by the sieve holes 41 on the fixed drum 4 is received by the receiving groove 10. A cover 12 is slidably connected to the top of the receiving groove 10. When the receiving groove 10 rotates downward, the cover 12 slides under the action of its own gravity to close the left material chamber 101. The rice that has been received is in a state whereby part of the rice that initially falls into the discharge channel 5 is transferred to the right material chamber 102 at the bottom to be received. As the receiving trough 10 rotates upward, the sealing cover 12 slides under the action of its own gravity to close the right material chamber 102. The received part of the rice is transported along with the receiving trough 10 until the receiving trough 10 rotates downward, at which time the sealing cover 12 slides to open the right material chamber 102, and the received rice slides down along the top of the outer wall of the fixed cylinder 4, which has the effect of being scattered in the discharge channel 5, thereby avoiding the pile-up of the discharged rice and affecting the discharge efficiency.

[0039] Preferably, the end of the receiving trough 10 facing the fixed cylinder 4 is open, which is conducive to receiving rice on the one hand, and on the other hand, the outer walls of adjacent receiving troughs 10 are designed in an eight-shaped shape, so that the rice falling between adjacent receiving troughs 10 is also scattered along the outer walls of the receiving trough 10, and because the outer walls of adjacent receiving troughs 10 are designed in an eight-shaped shape, part of the rice will continue to be scattered to the top of the outer wall of the fixed cylinder 4, which further facilitates the scattering efficiency.

[0040] In an embodiment of the present invention, Figures 1 to 8 As shown, a pressure detector is provided in the receiving trough 10. Specifically, the pressure detector can be an existing pressure sensor, which can be set on the inner side of the cover 12 to detect the weight of the rice in the receiving trough 10. When the pressure detected by the pressure detector is less than the preset value, it means that there are more light impurities remaining in the rice entering the discharge channel 5, which triggers the increase of the blowing air volume in the screening channel 7, thereby further increasing the wind screening of light impurities in the feed rice.

[0041] In an embodiment of the present invention, Figures 1 to 8 As shown, a contact switch 13 is provided on the cover 12. Specifically, a sliding sleeve 14 is provided on the top of the vertical partition 11. The cover 12 is slidably connected to the sliding sleeve 14 so that it can slide left and right. Limiting heads 15 are fixed at both ends of the cover 12. When the cover 12 slides to close the left material chamber 101 or the right material chamber 102, the limiting head 15 at one end abuts against the side end of the sliding sleeve 14 to prevent the cover 12 from sliding off completely. Preferably, the contact switch 13 is provided on the limiting head 15 near one end of the left material chamber 101, so that when the cover 12 completely closes the right material chamber 102, the contact switch 13 is triggered, and the contact switch 13 is used to trigger the pressure detector in the corresponding material trough 10 to start detection, that is, only the material trough 10 that has completed material loading is detected, and the material trough 10 that cannot close the right material chamber 102 due to excessive material loading is avoided.

[0042] In an embodiment of the present invention, Figures 1 to 8As shown, one end of the screening machine body 1 is fixedly connected to a feed end plate 16, and the other end is fixedly connected to a discharge end plate 17. The two ends of the screening drum 3 are rotatably connected to the feed end plate 16 and the discharge end plate 17 respectively. The two ends of the rotating drum 6 are rotatably connected to the feed end plate 16 and the discharge end plate 17 respectively. The two ends of the fixed drum 4 are fixedly connected to the feed end plate 16 and the discharge end plate 17 respectively. One end of the screening drum 3 is penetrated by the discharge end plate 17 and is connected to an inner gear ring 18. One end of the rotating drum 6 is penetrated by the discharge end plate 17 and is connected to an outer gear ring 19. The inner gear ring 18 and the outer gear ring 19 A transmission gear 20 is meshed and connected therebetween, and a main gear 21 is fixedly connected to one side of the transmission gear 20. One end of the main gear 21 passes through the screening machine body 1 and is drivingly connected to the large gear device 22 on the outside of the screening machine body 1. Specifically, the large gear device 22 can adopt a large ring gear and a large ring gear cover. The outside of the large ring gear can be meshed and connected with power components such as a driving gear and a driving motor to drive the large gear device 22 to rotate, thereby driving the main gear 21, the transmission gear 20, the inner ring gear 18, and the outer ring gear 19 to rotate in turn, that is, driving the screening drum 3 and the rotating drum 6 to rotate synchronously in opposite directions.

[0043] In an embodiment of the present invention, Figures 1 to 8 As shown, the discharge end plate 17 is located at the lower end of the drum 6, the lower end of the screening channel 7, and the lower end of the discharge channel 5 are respectively connected to the discharge pipes 23, that is, used for the respective inclined discharge of heavy impurity particles, light impurity particles and rice.

[0044] Specifically, an air inlet duct may be provided on one side of the feed end plate 16. The air inlet duct may be provided in a closed annular shape along the screening channel 7 or in an unclosed annular shape along the screening channel 7. For the unclosed annular shape design, the bottom end of the annular shape is empty, and the screening channel 7 expands outward at the empty bottom end of the annular shape to allow the slide at the bottom end of the feed hopper 2 to feed into the screening channel 7. Alternatively, for the closed annular shape screening channel 7 design, the slide at the bottom end of the feed hopper 2 feeds into the center of the feed end plate 16 and then falls into the screening channel 7.

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0046] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rice screening device, comprising a screening machine body (1), wherein a feed hopper (2) is provided at the top of the screening machine body (1), characterized in that: Also includes: A screening drum (3) is obliquely arranged in the screening machine body (1); A fixed cylinder (4) is arranged in the screening cylinder (3), an annular discharge channel (5) is formed between the fixed cylinder (4) and the screening cylinder (3), and a screening hole (41) is provided at the bottom end of the fixed cylinder (4); A rotating drum (6) is rotatably arranged in the fixed drum (4), and an annular screening channel (7) is formed between the rotating drum (6) and the fixed drum (4). Rice enters the screening channel (7) from the feed hopper (2), and air is blown along the axial direction of the screening channel (7) to blow away light impurities. The rice is screened by the sieve holes (41) and is obliquely discharged through the discharge channel (5); A leakage hole (61) is provided on the outer peripheral side end of the rotating drum (6), and an inclined plate (8) is provided at intervals on the outer periphery of the rotating drum (6). The inclined plate (8) is arranged to be inclined in the opposite direction of the rotation direction of the rotating drum (6), and a fixed gap (9) is left between the end of the inclined plate (8) away from the rotating drum (6) and the fixed drum (4). When the rotating drum (6) rotates, the rice is scraped by the inclined plate (8), so that part of the rice flows along the fixed gap (9), and large particles of impurities are scraped by the inclined plate (8) until they are brought to the top of the fixed drum (4) and fall into the rotating drum (6) along the leakage hole (61); The leakage hole (61) is connected to a flip cover (62) for unidirectional rotation. When the flip cover (62) is rotated to the top of the rotating drum (6), it is acted on by its own gravity and rotates inward in a unidirectional direction to open the leakage hole (61). When the flip cover (62) is rotated to the bottom of the rotating drum (6), it is rotated downward to reset and close the leakage hole (61).

2. A rice screening device according to claim 1, characterized in that: The screening drum (3), the fixed drum (4), and the rotating drum (6) are all coaxially designed.

3. A rice screening device according to claim 1, characterized in that: The sieve holes (41) are simultaneously opened on each of the inclined plates (8).

4. A rice screening device according to claim 1, characterized in that: The screening drum (3) is rotatably connected to the screening machine body (1), and a plurality of receiving grooves (10) are arranged circumferentially on the inner side wall of the screening drum (3). A vertical partition (11) is vertically provided in the receiving groove (10), and the vertical partition (11) divides the receiving groove (10) into a left material chamber (101) and a right material chamber (102). The top of the receiving groove (10) is slidably connected to a cover (12). When the receiving groove (10) rotates downward, the cover (12) slides under the action of its own gravity and is in a state of closing the left material chamber (101). When the receiving groove (10) rotates upward, the cover (12) slides under the action of its own gravity and is in a state of closing the right material chamber (102). Part of the rice is transported along with the receiving groove (10) and is spread in the discharge channel (5).

5. A rice screening device according to claim 4, characterized in that: The end of the material receiving trough (10) facing the fixing cylinder (4) is designed to be open.

6. A rice screening device according to claim 4, characterized in that: A pressure detector is provided in the receiving trough (10) for detecting the weight of the rice in the receiving trough (10). When the pressure detected by the pressure detector is less than a preset value, the air volume in the screening channel (7) is triggered to increase.

7. A rice screening device according to claim 6, characterized in that: The sealing cover (12) is provided with a contact switch (13). When the sealing cover (12) completely closes the right material chamber (102), the corresponding pressure detector is triggered by the contact switch (13) to start detection.

8. The rice screening device according to claim 1, characterized in that: One end of the screening machine body (1) is fixedly connected to a feed end plate (16), and the other end is fixedly connected to a discharge end plate (17). The two ends of the screening drum (3) are respectively rotatably connected to the feed end plate (16) and the discharge end plate (17). The two ends of the rotating drum (6) are respectively rotatably connected to the feed end plate (16) and the discharge end plate (17). The two ends of the fixed drum (4) are respectively fixedly connected to the feed end plate (16) and the discharge end plate (17). One end of the screening drum (3) The discharging end plate (17) is penetrated and connected to an inner gear ring (18); one end of the rotating drum (6) is penetrated and connected to an outer gear ring (19); a transmission gear (20) is meshed and connected between the inner gear ring (18) and the outer gear ring (19); one side of the transmission gear (20) is fixedly connected to a main gear (21); one end of the main gear (21) is penetrated and connected to the screening machine body (1) and is driven by a large gear device (22) on the outside of the screening machine body (1).

9. The rice screening device according to claim 8, characterized in that: The discharge end plate (17) is located at the lower end of the rotating drum (6), the lower end of the screening channel (7), and the lower end of the discharge channel (5), and is respectively connected to a discharge pipe (23).

Images