Plant seed screening device

Abstract

The invention discloses a plant seed screening device, and relates to the technical field of seed screening equipment, the plant seed screening device comprises a seat plate and a screen drum longitudinal movement guide mechanism, the screen drum longitudinal movement guide mechanism comprises a longitudinal movement plate, a longitudinal sliding groove is formed in the upper side of the seat plate, and a longitudinal sliding block is slidably connected in the longitudinal sliding groove; the top of the longitudinal sliding block is fixedly connected with a longitudinal moving plate, the plant seed screening mechanism comprises a screening cylinder, and the outer sides of the front end and the rear end of the screening cylinder are rotationally sleeved with two supporting rings correspondingly. According to the plant seed screening device, the rotary screening barrel composed of the first-stage screening sleeve, the second-stage screening sleeve and the third-stage screening sleeve is adopted for screening, spiral conveying blades convey plant seeds at the bottom in the screening barrel backwards along with rotation of the screening barrel, and multi-stage slow screening can be conducted on the plant seeds; and weed seeds and non-full plant seeds contained in the plant seeds can be screened out.

Description

Technical Field

[0001] The invention relates to the technical field of seed screening equipment, in particular to a plant seed screening device. Background Art

[0002] At present, in agricultural plant cultivation, the harvested plant seeds generally contain seeds of other weeds, and the plant seeds also have incomplete grains. In order to improve the survival rate of seeds and reduce weed seeds in plants, plant seeds are generally screened. In the prior art, inclined screens are generally used. However, during screening, plant seeds fall on the inclined screen and fall downward quickly. In addition, some plant leaves may be mixed in the plant seeds. The plant leaves may interfere with the plant seeds falling from the mesh of the screen, resulting in poor screening effect for plant seeds. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a plant seed screening device, which adopts a rotating screening cylinder composed of a primary screening sleeve, a secondary screening sleeve and a tertiary screening sleeve for screening. The spiral conveying blades convey the plant seeds at the bottom of the screening cylinder backwards as the screening cylinder rotates, and can perform multi-stage slow screening on the plant seeds, which is beneficial to screening out weed seeds and incomplete plant seeds contained in the plant seeds. A dust and debris blowing mechanism can be used to blow away debris and broken plant leaves in the plant seeds, and large plant leaves are discharged from the rear end of the screening cylinder, which can avoid the plant leaves interfering with the screening of plant seeds. The plant seeds are fully screened and the screening effect is good, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a plant seed screening device, comprising a seat plate and a screen drum longitudinal movement guide mechanism, wherein the screen drum longitudinal movement guide mechanism comprises a longitudinal slide groove, a longitudinal movement plate and a longitudinal slider, wherein a longitudinal slide groove is provided on the upper side of the seat plate, a longitudinal slider is slidably connected in the longitudinal slide groove, and a longitudinal movement plate is fixedly connected to the top of the longitudinal slider, and further comprising: The plant seed screening mechanism comprises a bracket, a support ring, a screening cylinder, an anti-drop end sleeve and a spiral conveying blade. The front and rear ends of the screening cylinder are respectively rotatably sleeved with two support rings, and the two support rings are respectively installed on the longitudinal movement plate through the bracket. The front end of the screening cylinder is fixedly connected with the anti-drop end sleeve, and the front end diameter of the anti-drop end sleeve is smaller than the rear end diameter. The screening cylinder is a conical cylinder, and the front end diameter of the screening cylinder is larger than the rear end diameter, and the inner wall of the screening cylinder is provided with a spiral conveying blade; The shift screening power mechanism is connected to the rear end of the screening cylinder.

[0005] The longitudinal slide groove and the longitudinal slider are provided to allow the longitudinal moving plate to move forward and backward relative to the seat plate, so that the plant seed screening mechanism can move back and forth, which is beneficial for the plant seeds in the screening cylinder to shake back and forth, and is beneficial for the plant seeds to fully pass through the sieve holes on the screening cylinder. The plant seeds to be screened can be sent into the screening cylinder through the front end of the anti-drop end sleeve. Due to the shape of the screening cylinder, the anti-drop end sleeve is required to block the bottom of the front end of the screening cylinder to prevent the plant seeds from falling from the bottom of the front end of the screening cylinder due to the tilted state of the bottom of the screening cylinder. The shift screening power mechanism drives the screening cylinder to rotate counterclockwise relative to the support ring, and the spiral conveying blades transport the plant seeds at the bottom of the screening cylinder backward as the screening cylinder rotates counterclockwise, so that the screening cylinder can fully screen the plant seeds. The rotating screening cylinder screens the plant seeds more fully, and large plant leaves that cannot pass through the sieve holes are discharged from the rear end of the screening cylinder.

[0006] Furthermore, the screening cylinder includes a primary screening sleeve, a secondary screening sleeve and a tertiary screening sleeve, wherein the primary screening sleeve, the secondary screening sleeve and the tertiary screening sleeve are connected end to end from front to back, the front peripheral side of the primary screening sleeve is rotatably connected to the front support ring, the rear peripheral side of the tertiary screening sleeve is rotatably connected to the rear support ring, and the front end of the primary screening sleeve is fixedly connected to the rear end of the anti-drop end sleeve, and the diameters of the sieve holes on the primary screening sleeve, the secondary screening sleeve and the tertiary screening sleeve increase in sequence. The screening cylinder is divided into three levels, wherein the sieve holes on the primary screening sleeve are used to screen out weed seeds, the sieve holes on the secondary screening sleeve are used to screen out unfilled plant seeds, and the sieve holes on the tertiary screening sleeve are used to screen out full plant seeds, while debris that cannot pass through the sieve holes on the tertiary screening sleeve, such as plant leaves, will be discharged from the rear end of the tertiary screening sleeve, completing multi-level screening of plant seeds.

[0007] Furthermore, the shift screening power mechanism includes a bent rod, a transmission plate, an active rod one, an active rod two, a power plate, a power shaft, a power motor, and a motor frame. The rear end of the three-stage screening sleeve is connected to the transmission plate through a plurality of bent rods distributed in a circular array. The rear side of the transmission plate is movably connected to three active rods one distributed at equal angles through an active shaft one. The rear ends of the three active rods one are movably connected to the front ends of the three active rods two through active shaft two, respectively. The rear ends of the three active rods two are movably connected to the power plate through active shaft three. The center lines of the power plate, the transmission plate, and the screening drum coincide with each other, and the middle part of the rear side of the power plate is fixedly connected to the output shaft of the power motor through a longitudinal power shaft. The power motor is installed at the rear end of the seat plate through the motor frame. The motor frame is used to install and fix the power motor. When the power motor works, it drives the power shaft and the power disk to rotate counterclockwise. The power disk drives the transmission disk to rotate counterclockwise through the transmission of three sets of movable rods 1 and 2. The transmission disk drives the screening drum to rotate counterclockwise through the bent rod. The angle of movable rod 1 and movable rod 2 becomes larger to adapt to the forward and backward reciprocating movement of the longitudinal moving plate and the screening drum. When the longitudinal moving plate and the screening drum move forward, the angle between movable rod 1 and movable rod 2 becomes larger. When the longitudinal moving plate and the screening drum move backward, the angle between movable rod 1 and movable rod 2 becomes smaller.

[0008] Furthermore, it also includes a longitudinal vibration mechanism, which includes a turntable, a hemispherical protrusion, a curved frame, a roller and a vibration opening control component. The front end of the longitudinal slide groove is connected to the front side of the longitudinal sliding block through a longitudinal return spring, and the rear side of the longitudinal movement plate is connected to the front end of the horizontal part of the curved frame through a vibration opening control component. The top rear side of the vertical part of the curved frame is rotatably connected to the roller, the power shaft is fixedly connected to the middle of the turntable, and a plurality of hemispherical protrusions are arranged in a circular array on the front edge of the turntable, and the rear end of the roller is fixedly connected to the front edge of the turntable. When the power shaft rotates, it drives the turntable to rotate. When the hemispherical protrusion on the turntable meets the roller, it pushes the roller, the curved frame and the longitudinal plate forward. At this time, the reset spring is compressed. When the hemispherical protrusion on the turntable is separated from the roller, the reset spring resets and extends, pushing the longitudinal plate backward. As the turntable continues to rotate, the longitudinal plate drives the screening cylinder to vibrate back and forth. When the screening cylinder does not need to vibrate back and forth to fully screen the plant seeds, the vibration control component is turned on to drive the curved frame and the roller forward so that the roller cannot contact the hemispherical protrusion. At this time, the rotation of the turntable cannot act on the roller, and the longitudinal plate and the screening cylinder will no longer vibrate back and forth.

[0009] Furthermore, it also includes a seed screening and receiving mechanism, which includes an arc receiving plate, an arc partition, a feed groove, a seed feed groove body and a large-particle debris feed groove body. An arc receiving plate is arranged below the screening cylinder, and the arc receiving plate is fixedly connected to the bracket. The arc receiving plate is divided into three arc receiving grooves by four arc partitions. Three feed grooves are respectively opened on the arc receiving plate corresponding to the middle parts of the three arc receiving grooves, and the bottom of each feed groove is respectively fixedly connected to a seed feed groove body, and the seed feed groove body is inclined with the left side lower and the right side higher. A large-particle debris feed groove body is fixedly connected to the bracket on the rear side, and the left end of the large-particle debris feed groove body is located below the rear end of the three-stage screening sleeve, and the large-particle debris feed groove body is inclined with the left side higher and the right side lower. The weed seeds screened out by the first-stage screening sleeve fall into the circular arc receiving groove on the front side, the unfilled plant seeds screened out by the second-stage screening sleeve fall into the circular arc receiving groove in the middle part, and the full plant seeds screened out by the third-stage screening sleeve fall into the circular arc receiving groove on the rear side. The weed seeds, unfilled plant seeds and full plant seeds in the three circular arc receiving grooves fall into the three seed feeding trough bodies respectively through the three feeding troughs. Three boxes can be placed at the left ends of the three seed feeding trough bodies to receive the weed seeds, unfilled plant seeds and full plant seeds respectively. The plant leaves or other large-particle debris that cannot be screened out are transported backwards along the spiral conveying blades, fall from the rear end of the screening cylinder into the large-particle debris feeding trough body, and are guided into the debris collection box through the large-particle debris feeding trough body.

[0010] Furthermore, it also includes a dust and debris blowing mechanism, which includes a support rod, a guide channel, a wind direction adjustment component and a blower. Two support rods are fixedly connected to the left sides of the two brackets respectively, and a guide channel is connected between the two support rods through the wind direction adjustment component. A blower is installed at the left end of the guide channel, and the right end air outlet of the guide channel faces the upper side of the arc receiving plate. Broken plant leaves or dust will fall onto the arc receiving plate through the sieve holes and mix into weed seeds, unfilled plant seeds and full plant seeds. Therefore, a dust and debris blowing mechanism is provided. The blower blows air to the left end of the guide channel, and the wind blows from the right end of the guide channel to the upper side of the arc receiving plate, blowing away the broken plant leaves or dust that fall through the sieve holes to the right. The wind direction adjustment component can change the direction of the guide channel so that the wind can better blow away the broken plant leaves or dust.

[0011] Furthermore, it also includes a knocking vibration mechanism, which includes a support block, a knocking spring, a knocking ball and a hemispherical block. The support block is fixedly connected to the top of the rear support ring, and the front side of the support block is connected to the knocking ball through the knocking spring. The outer peripheral side of the secondary screening sleeve is provided with a plurality of hemispherical blocks in a circular array corresponding to the position of the knocking ball. As the secondary screening sleeve rotates, the hemispherical block meets the knocking ball, the hemispherical block lifts up the knocking ball, and the knocking spring bends upward. When the hemispherical block leaves the knocking ball, the knocking spring rebounds downward due to the bending, driving the knocking ball to knock the secondary screening sleeve, so that the secondary screening sleeve, the primary screening sleeve and the tertiary screening sleeve are knocked and vibrated, thereby achieving full screening of plant seeds in the screening cylinder and promoting screening of the corresponding things.

[0012] Furthermore, it also includes a screening raw material quantity control adding mechanism, the screening raw material quantity control adding mechanism includes a support frame, an inclined channel and a raw material adding bucket, the front end of the seat plate is installed with an inclined channel through the support frame, the inclined channel is tilted high at the front and low at the back, the rear end of the inclined channel extends into the anti-drop end sleeve, and the front end of the inclined channel is fixedly connected with the raw material adding bucket. If the plant seeds to be screened are directly poured into the anti-drop end sleeve, the screening effect of the plant seeds is poor due to the accumulation of a large number of plant seeds, so the plant seeds to be screened are poured into the raw material adding bucket, and the plant seeds in the raw material adding bucket are gradually guided into the anti-drop end sleeve through the inclined channel, so as to facilitate the control of the addition amount of the plant seeds to be screened.

[0013] Furthermore, the screening material quantity control adding mechanism further comprises a gate and a gate control assembly, wherein the gate is slidably connected in the upper guide groove of the inclined channel, and the top of the gate is connected to the upper side of the inclined channel through the gate control assembly. The gate control assembly controls the length of the gate extending into the inclined channel, thereby being able to control the speed at which the plant seeds pass through the inclined channel, allowing the plant seeds to enter the screening cylinder at a suitable speed, which is conducive to the screening cylinder fully screening the plant seeds.

[0014] Furthermore, the screening raw material controlled quantity adding mechanism also includes a feeding reciprocating plate, a feeding convex strip and a reciprocating power assembly. A reciprocating slot is provided at the front bottom of the raw material adding bucket, and a feeding reciprocating plate is slidably connected in the reciprocating slot. The rear end of the feeding reciprocating plate is located at the bottom of the inclined channel. A plurality of feeding convex strips are longitudinally arranged at equal distances on the upper side of the rear end of the feeding reciprocating plate. The front end of the feeding reciprocating plate is connected to a reciprocating power assembly. The reciprocating power assembly is used to drive the feeding reciprocating plate to reciprocate back and forth. The feeding reciprocating plate reciprocates at the bottom of the inclined channel. The feeding convex strips on the feeding reciprocating plate can promote the plant seeds in the inclined channel to pass through the bottom of the gate plate, thereby preventing the plant seeds to be screened from sliding smoothly backward from the inclined channel due to a large number of leaves mixed in the plant seeds.

[0015] Compared with the prior art, the plant seed screening device has the following beneficial effects: 1. The screening is carried out by a rotating screening cylinder composed of a primary screening sleeve, a secondary screening sleeve and a tertiary screening sleeve. The spiral conveying blades convey the plant seeds at the bottom of the screening cylinder backwards as the screening cylinder rotates, and the plant seeds can be screened slowly in multiple stages, which is conducive to screening out weed seeds and incomplete plant seeds contained in the plant seeds.

[0016] 2. Broken plant leaves or dust will fall through the sieve holes onto the arc receiving plate and mix with weed seeds, unfilled plant seeds and full plant seeds. Therefore, a dust and debris blowing mechanism is provided. The blower blows air toward the left end of the guide channel, and the wind blows from the right end of the guide channel to the upper side of the arc receiving plate, blowing away the broken plant leaves or dust that fall through the sieve holes to the right. The wind direction adjustment component can change the direction of the guide channel so that the wind can better blow away the broken plant leaves or dust.

[0017] 3. Large pieces of plant leaves are discharged from the rear end of the screening cylinder, which can prevent the plant leaves from interfering with the screening of plant seeds, so that the plant seeds can be fully screened and the screening effect is good.

[0018] 4. The gate control component controls the length of the gate extending into the inclined channel, thereby controlling the speed at which the plant seeds pass through the inclined channel, allowing the plant seeds to enter the screening cylinder at a suitable speed, which is beneficial for the screening cylinder to fully screen the plant seeds. The reciprocating power component is used to drive the feeding reciprocating plate to reciprocate back and forth. The feeding reciprocating plate reciprocates at the bottom of the inclined channel, and the feeding convex strips on the feeding reciprocating plate can promote the plant seeds in the inclined channel to pass through the bottom of the gate, avoiding the mixing of a large number of leaves in the plant seeds and affecting the smooth sliding backwards of the plant seeds to be screened from the inclined channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the plant seed screening device of the present invention; Figure 2 The plant seed screening device of the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 This is a schematic diagram of the rear structure of the plant seed screening device of the present invention; Figure 4 The plant seed screening device of the present invention Figure 3 A schematic diagram of the partially enlarged structure at B in the middle; Figure 5 The plant seed screening device of the present invention Figure 3 A schematic diagram of the partially enlarged structure at C in the middle; Figure 6 It is a cross-sectional structural schematic diagram of a plant seed screening mechanism and a knocking vibration mechanism in the plant seed screening device of the present invention; Figure 7It is a structural schematic diagram of a seed screening receiving mechanism in a plant seed screening device of the present invention; Figure 8 It is a schematic cross-sectional structure diagram of a mechanism for controlling the amount of raw materials to be added in the plant seed screening device of the present invention; In the figure: 1 seat plate, 2 screen drum longitudinal guide mechanism, 21 longitudinal slide groove, 22 longitudinal shift plate, 23 longitudinal slider, 24 guide longitudinal column, 25 reset spring, 3 plant seed screening mechanism, 31 bracket, 32 support ring, 33 primary screening sleeve, 34 secondary screening sleeve, 35 tertiary screening sleeve, 36 anti-drop end sleeve, 37 spiral transmission blade, 4 shift screening power mechanism, 41 bent rod, 42 transmission plate, 43 movable rod one, 44 movable rod two, 45 power plate, 46 power shaft, 47 power motor, 48 motor frame, 5 longitudinal vibration mechanism, 51 turntable, 52 hemispherical protrusion, 53 bent frame, 54 roller, 55 control panel, 56 longitudinal guide rod, 57 longitudinal screw, 58 knob one , 6 knocking vibration mechanism, 61 support block, 62 knocking spring, 63 knocking ball, 64 hemispherical block, 7 dust and debris blowing mechanism, 71 support rod, 72 guide channel, 73 stud, 74 fastening nut, 75 blower, 8 seed screening receiving mechanism, 81 arc receiving plate, 82 arc partition, 83 feeding trough, 84 seed feeding trough body, 85 large particle debris feeding trough body, 9 screening raw material control adding mechanism, 91 support frame, 92 inclined channel, 93 raw material adding bucket, 94 gate, 95 screw nut, 96 control screw, 97 knob two, 98 feeding reciprocating plate, 99 feeding convex strip, 910 cylinder, 911 connecting rod, 912 rotary rod, 913 reciprocating motor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] For example, see Figures 1 to 8 The present embodiment provides a technical solution: a plant seed screening device, comprising a seat plate 1 and a screen drum longitudinal movement guide mechanism 2, the screen drum longitudinal movement guide mechanism 2 comprises a longitudinal slide groove 21, a longitudinal movement plate 22 and a longitudinal slide block 23, the upper side of the seat plate 1 is provided with a longitudinal slide groove 21, the longitudinal slide groove 21 is slidably connected with the longitudinal slide block 23, and the top of the longitudinal slide block 23 is fixedly connected with the longitudinal movement plate 22; The screen drum longitudinal guide mechanism 2 also includes a guide longitudinal column 24, which is fixedly connected in the longitudinal slide groove 21. The guide longitudinal column 24 is slidably connected to the sliding hole on the longitudinal slide block 23. With the help of the guide longitudinal column 24, the longitudinal slide groove 21 and the longitudinal slide block 23 are more stably slidably connected to each other, thereby preventing the longitudinal movement plate 22 from separating from the seat plate 1.

[0022] It also includes a plant seed screening mechanism 3 and a shift screening power mechanism 4; The plant seed screening mechanism 3 includes a bracket 31, a support ring 32, a screening cylinder, an anti-drop end sleeve 36 and a spiral conveying blade 37. Two support rings 32 are rotatably sleeved on the outer sides of the front and rear ends of the screening cylinder, and the two support rings 32 are respectively installed on the longitudinal moving plate 22 through the bracket 31. The front end of the screening cylinder is fixedly connected with the anti-drop end sleeve 36, and the front end diameter of the anti-drop end sleeve 36 is smaller than the rear end diameter. The screening cylinder is a conical cylinder, and the front end diameter of the screening cylinder is larger than the rear end diameter, and the inner wall of the screening cylinder is provided with a spiral conveying blade 37; The screening cylinder includes a primary screening sleeve 33, a secondary screening sleeve 34 and a tertiary screening sleeve 35, which are connected end to end from front to back, the front peripheral side of the primary screening sleeve 33 is rotatably connected to the front support ring 32, the rear peripheral side of the tertiary screening sleeve 35 is rotatably connected to the rear support ring 32, and the front end of the primary screening sleeve 33 is fixedly connected to the rear end of the anti-drop end sleeve 36, and the diameters of the sieve holes on the primary screening sleeve 33, the secondary screening sleeve 34 and the tertiary screening sleeve 35 are increased in sequence. The screening cylinder is divided into three levels, wherein the sieve holes on the primary screening sleeve 33 are used to screen out weed seeds, the sieve holes on the secondary screening sleeve 34 are used to screen out unfilled plant seeds, and the sieve holes on the tertiary screening sleeve 35 are used to screen out full plant seeds, while debris that cannot pass through the sieve holes on the tertiary screening sleeve 35, such as plant leaves, will be discharged from the rear end of the tertiary screening sleeve 35, completing multi-level screening of plant seeds.

[0023] The shift screening power mechanism 4 is connected to the rear end of the screening cylinder; The shift screening power mechanism 4 includes a bent rod 41, a transmission disk 42, an active rod 1 43, an active rod 2 44, a power disk 45, a power shaft 46, a power motor 47, and a motor frame 48. The rear end of the three-stage screening sleeve 35 is connected to the transmission disk 42 through a plurality of bent rods 41 distributed in a circular array, wherein three bent rods 41 are specifically provided, and the rear side of the transmission disk 42 is movably connected to three active rods 1 43 distributed at equal angles through an active shaft 1, and the rear ends of the three active rods 1 43 are respectively movably connected to the front ends of the three active rods 2 44 through an active shaft 2, and the rear ends of the three active rods 2 44 are all movably connected to the power disk 45 through an active shaft 3. The center lines of the power disk 45, the transmission disk 42 and the screening cylinder coincide, and the middle part of the rear side of the power disk 45 is fixedly connected to the output shaft of the power motor 47 through a longitudinal power shaft 46, and the power motor 47 is installed at the rear end of the seat plate 1 through a motor frame 48. The motor frame 48 is used to install and fix the power motor 47. When the power motor 47 works, it drives the power shaft 46 and the power disk 45 to rotate counterclockwise. The power disk 45 drives the transmission disk 42 to rotate counterclockwise through the transmission of three sets of movable rods 1 43 and movable rods 2 44. The transmission disk 42 drives the screening drum to rotate counterclockwise through the bent rod 41. The angle of movable rod 1 43 and movable rod 2 44 becomes larger to adapt to the forward and backward reciprocating movement of the longitudinal moving plate 22 and the screening drum. When the longitudinal moving plate 22 and the screening drum move forward, the angle between movable rod 1 43 and movable rod 2 44 becomes larger. When the longitudinal moving plate 22 and the screening drum move backward, the angle between movable rod 1 43 and movable rod 2 44 becomes smaller.

[0024] It also includes a longitudinal vibration mechanism 5, which includes a turntable 51, a hemispherical protrusion 52, a curved frame 53, a roller 54 and a vibration opening control component. The front end of the longitudinal slide groove 21 is connected to the front side of the longitudinal slide 23 through a longitudinal return spring 25. The return spring 25 is sleeved on the front end of the guide longitudinal column 24. The rear side of the longitudinal movement plate 22 is connected to the front end of the horizontal part of the curved frame 53 through a vibration opening control component. The top rear side of the vertical part of the curved frame 53 is rotatably connected to the roller 54. The power shaft 46 is fixedly connected to the middle part of the turntable 51. A plurality of hemispherical protrusions 52 are arranged in a circular array on the front side edge of the turntable 51. Specifically, six hemispherical protrusions 52 are arranged. The rear end of the roller 54 is fixedly connected to the front side edge of the turntable 51.

[0025] The vibration opening control assembly includes a control plate 55, a longitudinal guide rod 56, a longitudinal moving screw 57, and a knob 58. The rear side of the longitudinal moving plate 22 is fixedly connected to the front end of the longitudinal guide rod 56, and the rear side of the longitudinal moving plate 22 is rotatably connected to the front end of the longitudinal moving screw 57 through a bearing. The rear end of the longitudinal moving screw 57 is fixedly connected to a knob 58. The sliding hole on the control plate 55 is slidably connected to the longitudinal guide rod 56, and the threaded hole on the control plate 55 is threadedly connected to the longitudinal moving screw 57. The rear side of the control plate 55 is fixedly connected to the front end of the horizontal part of the bending frame 53, and the longitudinal moving screw is rotated clockwise by a knob 58. The threaded action of the lever 57, the longitudinal movement screw 57 and the control plate 55 drives the control plate 55 to move forward along the longitudinal guide rod 56, so that the roller 54 can be moved away from the turntable 51, so that when the turntable 51 rotates, it cannot act on the curved frame 53, the roller 54 and the longitudinal movement plate 22 with the help of the hemispherical protrusion 52, and the screening drum cannot vibrate back and forth at this time. By rotating the longitudinal movement screw 57 counterclockwise through the knob 58, the turntable 51 can be brought close to the roller 54. At this time, when the turntable 51 rotates, it can act on the curved frame 53, the roller 54 and the longitudinal movement plate 22 through the hemispherical protrusion 52, so that the screening drum can vibrate back and forth.

[0026] When the power shaft 46 rotates, it drives the turntable 51 to rotate. When the hemispherical protrusion 52 on the turntable 51 meets the roller 54, the roller 54, the curved frame 53 and the longitudinal plate 22 are pushed forward. At this time, the reset spring 25 is compressed. When the hemispherical protrusion 52 on the turntable 51 is separated from the roller 54, the reset spring 25 is reset and extended, pushing the longitudinal plate 22 to move backward. As the turntable 51 continues to rotate, the longitudinal plate 22 drives the screening drum to vibrate back and forth. When the screening drum does not need to vibrate back and forth to fully screen the plant seeds, the vibration control assembly is turned on to drive the curved frame 53 and the roller 54 to move forward, so that the roller 54 cannot contact the hemispherical protrusion 52. At this time, the rotation of the turntable 51 cannot act on the roller 54, and the longitudinal plate 22 and the screening drum will no longer vibrate back and forth.

[0027] When in use, the longitudinal slide groove 21 and the longitudinal slide block 23 are set to allow the longitudinal moving plate 22 to move forward and backward relative to the seat plate 1, so that the plant seed screening mechanism 3 can move back and forth, which is beneficial for the plant seeds in the screening cylinder to shake back and forth, and is beneficial for the plant seeds to fully pass through the sieve holes on the screening cylinder. The plant seeds to be screened can be sent into the screening cylinder through the front end of the anti-drop end sleeve 36. Due to the shape of the screening cylinder, the anti-drop end sleeve 36 is required to block the bottom of the front end of the screening cylinder to prevent the plant seeds from falling from the bottom of the front end of the screening cylinder due to the inclined state of the bottom of the screening cylinder. The shift screening power mechanism 4 drives the screening cylinder to rotate counterclockwise relative to the support ring 32, and the spiral conveying blades 37 transport the plant seeds at the bottom of the screening cylinder backward as the screening cylinder rotates counterclockwise, so that the screening cylinder can fully screen the plant seeds. The rotating screening cylinder screens the plant seeds more fully, and large plant leaves that cannot pass through the sieve holes are discharged from the rear end of the screening cylinder.

[0028] For example 2, please refer to Figures 1 to 8 This embodiment provides a technical solution: a plant seed screening device. The structure of this embodiment is roughly the same as that of the first embodiment, except that: The seed screening receiving mechanism 8 is also included, and the seed screening receiving mechanism 8 includes an arc receiving plate 81, an arc partition plate 82, a feeding groove 83, a seed feeding trough body 84 and a large particle debris feeding trough body 85. An arc receiving plate 81 is arranged below the screening cylinder, and the arc receiving plate 81 is fixedly connected to the bracket 31. The arc receiving plate 81 is divided into three arc receiving grooves by four arc partition plates 82. Three feeding grooves 83 are respectively opened on the arc receiving plate 81 corresponding to the middle parts of the three arc receiving grooves. The bottom of each feeding groove 83 is respectively fixedly connected to a seed feeding trough body 84. The seed feeding trough body 84 is tilted with the left lower and the right higher. A large particle debris feeding trough body 85 is fixedly connected to the bracket 31 on the rear side. The left end of the large particle debris feeding trough body 85 is located below the rear end of the three-stage screening sleeve 35, and the large particle debris feeding trough body 85 is tilted with the left higher and the right lower.

[0029] During use, the weed seeds screened out by the first-stage screening sleeve 33 fall into the circular arc receiving groove on the front side, the unfilled plant seeds screened out by the second-stage screening sleeve 34 fall into the circular arc receiving groove in the middle, and the full plant seeds screened out by the third-stage screening sleeve 35 fall into the circular arc receiving groove on the rear side. The weed seeds, unfilled plant seeds and full plant seeds in the three circular arc receiving grooves fall into the three seed feeding trough bodies 84 respectively through the three feeding grooves 83. Three boxes can be placed at the left ends of the three seed feeding trough bodies 84 to receive the weed seeds, unfilled plant seeds and full plant seeds. The plant leaves or other large particles of debris that cannot be screened out are transported backwards along the spiral conveying blades 37, fall from the rear end of the screening cylinder into the large particle debris feeding trough body 85, and are guided into the debris collection box through the large particle debris feeding trough body 85.

[0030] For example 3, please refer to Figures 1 to 8 This embodiment provides a technical solution: a plant seed screening device. The structure of this embodiment is roughly the same as that of the second embodiment, except that: It also includes a dust and debris blowing mechanism 7, which includes a support rod 71, a guide channel 72, a wind direction adjustment component and a blower 75. The left sides of the two brackets 31 are respectively fixedly connected to two support rods 71, and the guide channel 72 is connected between the two support rods 71 ​​through the wind direction adjustment component. The blower 75 is installed at the left end of the guide channel 72, and the air outlet at the right end of the guide channel 72 faces the upper side of the arc receiving plate 81.

[0031] The wind direction adjustment assembly includes a stud 73 and a fastening nut 74. The front and rear ends of the guide channel 72 are fixedly connected to two studs 73 respectively. The two studs 73 pass through the through holes on the two support rods 71 ​​respectively, and the ends of the two studs 73 away from the guide channel 72 are threadedly connected with fastening nuts 74. By loosening the fastening nuts 74, the guide channel 72 can rotate relative to the support rod 71 through the studs 73, and the direction of the right end of the guide channel 72 can be changed, thereby changing the direction of the air blowing. Then, the fastening nuts 74 are tightened to re-fix the guide channel 72.

[0032] Broken plant leaves or dust will fall onto the arc receiving plate 81 through the sieve holes and be mixed with weed seeds, unfilled plant seeds and full plant seeds. Therefore, a dust and debris blowing mechanism 7 is provided. The blower 75 blows air toward the left end of the guide channel 72, and the wind blows from the right end of the guide channel 72 toward the upper side of the arc receiving plate 81, blowing away the broken plant leaves or dust that fall through the sieve holes to the right. The wind direction adjustment component can change the direction of the guide channel 72 so that the wind can better blow away the broken plant leaves or dust.

[0033] Example 4, please refer to Figures 1 to 8 This embodiment provides a technical solution: a plant seed screening device. The structure of this embodiment is roughly the same as that of the third embodiment, except that: It also includes a knocking vibration mechanism 6, which includes a support block 61, a knocking spring 62, a knocking ball 63 and a hemispherical block 64. The support block 61 is fixedly connected to the top of the rear support ring 32, and the front side of the support block 61 is connected to the knocking ball 63 through the knocking spring 62. The outer peripheral side of the secondary screening sleeve 34 is provided with a plurality of hemispherical blocks 64 in a circular array corresponding to the position of the knocking ball 63, and specifically four hemispherical blocks 64 are provided.

[0034] When in use, as the secondary screening sleeve 34 rotates, the hemispherical block 64 meets the knocking ball 63, the hemispherical block 64 lifts up the knocking ball 63, and the knocking spring 62 bends upward. When the hemispherical block 64 leaves the knocking ball 63, the knocking spring 62 rebounds downward due to the bending, driving the knocking ball 63 to knock on the secondary screening sleeve 34, so that the secondary screening sleeve 34 as well as the primary screening sleeve 33 and the tertiary screening sleeve 35 are knocked and vibrated, thereby achieving sufficient screening of the plant seeds in the screening cylinder and promoting the screening of their respective corresponding things.

[0035] For example 5, please refer to Figures 1 to 8 This embodiment provides a technical solution: a plant seed screening device. The structure of this embodiment is roughly the same as that of the fourth embodiment, except that: It also includes a screening raw material quantity control adding mechanism 9, which includes a support frame 91, an inclined channel 92 and a raw material adding bucket 93. The front end of the seat plate 1 is installed with an inclined channel 92 through the support frame 91. The inclined channel 92 is tilted high at the front and low at the back. The rear end of the inclined channel 92 extends into the anti-drop end sleeve 36, and the front end of the inclined channel 92 is fixedly connected with the raw material adding bucket 93. If the plant seeds to be screened are directly poured into the anti-drop end sleeve 36, due to the accumulation of a large number of plant seeds, the screening effect of the plant seeds is poor. Therefore, the plant seeds to be screened are poured into the raw material adding bucket 93, and the plant seeds in the raw material adding bucket 93 are gradually guided into the anti-drop end sleeve 36 through the inclined channel 92, so as to facilitate the control of the addition amount of the plant seeds to be screened.

[0036] The screening raw material quantity control adding mechanism 9 also includes a gate plate 94 and a gate plate control component. The gate plate 94 is slidably connected in the upper guide groove of the inclined channel 92, and the top of the gate plate 94 is connected to the upper side of the inclined channel 92 through the gate plate control component.

[0037] The gate control assembly includes a screw nut 95, a control screw 96, and a knob 97. The upper side of the inclined channel 92 is rotatably connected to the bottom end of the control screw 96 through a bearing. The control screw 96 is perpendicular to the upper side of the inclined channel 92. The top of the control screw 96 is fixedly connected to the knob 97. The top of the gate 94 is fixedly connected to the screw nut 95. The screw nut 95 is threadedly connected to the control screw 96. The control screw 96 is rotated clockwise by the knob 97. The threaded action of the control screw 96 and the screw nut 95 drives the gate 94 to move upward along the guide groove. At this time, the speed of plant seeds passing through the inclined channel 92 is accelerated. The control screw 96 is rotated counterclockwise by the knob 97. The bottom end of the gate 94 extends into the inclined channel 92, and the speed of plant seeds passing through the inclined channel 92 is slowed down.

[0038] The gate control assembly controls the length of the gate 94 extending into the inclined channel 92, thereby controlling the speed at which plant seeds pass through the inclined channel 92, allowing the plant seeds to enter the screening cylinder at a suitable speed, which is beneficial for the screening cylinder to fully screen the plant seeds.

[0039] The screening raw material quantity control and addition mechanism 9 also includes a feeding reciprocating plate 98, a feeding convex strip 99 and a reciprocating power assembly. A reciprocating groove is provided at the front bottom of the raw material adding bucket 93, and a feeding reciprocating plate 98 is slidably connected in the reciprocating groove. The rear end of the feeding reciprocating plate 98 is located at the bottom of the inclined channel 92. A plurality of feeding convex strips 99 are longitudinally equidistantly arranged on the upper side of the rear end of the feeding reciprocating plate 98. The number of the feeding convex strips 99 is selected according to demand. The feeding reciprocating plate 98 always corresponds to the bottom of the gate plate 94 regardless of its forward and backward movement, and the front end of the feeding reciprocating plate 98 is connected to a reciprocating power assembly.

[0040] The reciprocating power assembly includes a cylinder 910, a connecting rod 911, a rotating rod 912, and a reciprocating motor 913. The front bottom of the feeding reciprocating plate 98 is fixedly connected to the top of the cylinder 910. The bottom end of the cylinder 910 is rotatably connected to one end of the connecting rod 911. The other end of the connecting rod 911 is movably connected to one end of the rotating rod 912 through a connecting shaft. The other end of the rotating rod 912 is fixedly connected to the output shaft of the reciprocating motor 913. The reciprocating motor 913 is fixed at the bottom of the inclined channel 92. The connecting rod 911 and the rotating rod 912 form a crank connection structure. The reciprocating motor 913 drives the rotating rod 912 to rotate when it works. The rotating rod 912 drives the feeding reciprocating plate 98 to reciprocate back and forth relative to the inclined channel 92 through the connecting rod 911 and the cylinder 910.

[0041] The reciprocating power assembly is used to drive the feeding reciprocating plate 98 to reciprocate back and forth. The feeding reciprocating plate 98 reciprocates at the bottom of the inclined channel 92. The feeding ridges 99 on the feeding reciprocating plate 98 can promote the plant seeds in the inclined channel 92 to pass through the bottom of the gate plate 94, thereby preventing the plant seeds to be screened from sliding smoothly backward from the inclined channel 92 due to a large number of leaves mixed in the plant seeds.

[0042] It is worth noting that the power motor 47, the blower 75, and the reciprocating motor 913 disclosed in the above embodiments are all controlled by an external PLC controller, and the control method thereof adopts the method commonly used in the prior art.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plant seed screening device, comprising a base plate (1) and a screen drum longitudinal movement guide mechanism (2), wherein the screen drum longitudinal movement guide mechanism (2) comprises a longitudinal slide groove (21), a longitudinal movement plate (22) and a longitudinal slide block (23), wherein the upper side of the base plate (1) is provided with a longitudinal slide groove (21), the longitudinal slide block (23) is slidably connected in the longitudinal slide groove (21), and the top of the longitudinal slide block (23) is fixedly connected to the longitudinal movement plate (22), characterized in that: Also includes: A plant seed screening mechanism (3) comprises a bracket (31), a support ring (32), a screening cylinder, an anti-drop end sleeve (36) and a spiral conveying blade (37); two support rings (32) are rotatably sleeved on the outer sides of the front and rear ends of the screening cylinder respectively; the two support rings (32) are respectively mounted on the longitudinal moving plate (22) through the bracket (31); the front end of the screening cylinder is fixedly connected to the anti-drop end sleeve (36); the screening cylinder is a conical cylinder, the front end diameter of the screening cylinder is larger than the rear end diameter, and the inner wall of the screening cylinder is provided with a spiral conveying blade (37); The shift screening power mechanism (4) is connected to the rear end of the screening cylinder.

2. The plant seed screening device according to claim 1, characterized in that: The screening cylinder comprises a primary screening sleeve (33), a secondary screening sleeve (34) and a tertiary screening sleeve (35), wherein the primary screening sleeve (33), the secondary screening sleeve (34) and the tertiary screening sleeve (35) are connected end to end in sequence from front to back, the front end outer peripheral side of the primary screening sleeve (33) is rotatably connected to the front support ring (32), the rear end outer peripheral side of the tertiary screening sleeve (35) is rotatably connected to the rear support ring (32), and the front end of the primary screening sleeve (33) is fixedly connected to the rear end of the anti-drop end sleeve (36).

3. The plant seed screening device according to claim 2, characterized in that: The shift screening power mechanism (4) comprises a bent rod (41), a transmission disc (42), a movable rod one (43), a movable rod two (44), a power disc (45), a power shaft (46), a power motor (47), and a motor frame (48). The rear end of the three-stage screening sleeve (35) is connected to the transmission disc (42) via a plurality of bent rods (41) distributed in a ring array. The rear side of the transmission disc (42) is movably connected to three movable rods one (43) distributed at equal angles. The rear ends of the three movable rods one (43) are respectively movably connected to the front ends of three movable rods two (44). The rear ends of the three movable rods two (44) are all movably connected to the power disc (45). The center lines of the power disc (45), the transmission disc (42) and the screening drum coincide with each other. The middle part of the rear side of the power disc (45) is fixedly connected to the output shaft of the power motor (47) via a longitudinal power shaft (46). The power motor (47) is mounted on the rear end of the seat plate (1) via the motor frame (48).

4. The plant seed screening device according to claim 3, characterized in that: It also includes a longitudinal vibration mechanism (5), which includes a turntable (51), a hemispherical protrusion (52), a curved frame (53), a roller (54) and a vibration opening control component. The front end of the longitudinal slide groove (21) is connected to the front side of the longitudinal slide block (23) through a longitudinal return spring (25), the rear side of the longitudinal movement plate (22) is connected to the front end of the horizontal part of the curved frame (53) through the vibration opening control component, and the top rear side of the vertical part of the curved frame (53) is rotatably connected to the roller (54), the power shaft (46) is fixedly connected to the middle part of the turntable (51), and a plurality of hemispherical protrusions (52) are arranged in a ring array on the front side edge of the turntable (51), and the rear end of the roller (54) is fixedly connected to the front side edge of the turntable (51).

5. The plant seed screening device according to claim 2, characterized in that: The seed screening receiving mechanism (8) further comprises a seed screening receiving mechanism (8), the seed screening receiving mechanism (8) comprising an arc receiving plate (81), an arc partition plate (82), a material discharge trough (83), a seed material discharge trough body (84) and a large particle debris material discharge trough body (85), a arc receiving plate (81) is arranged below the screening cylinder, the arc receiving plate (81) is fixedly connected to the bracket (31), and the arc receiving plate (81) is divided into three arc receiving troughs by the arc partition plate (82). The arc receiving plate (81) is provided with three material discharge slots (83) at positions corresponding to the middle parts of the three arc receiving slots, and the bottom of each material discharge slot (83) is fixedly connected to a seed material discharge slot body (84), and the seed material discharge slot body (84) is tilted and arranged with a lower left side and a higher right side, and a large particle debris material discharge slot body (85) is fixedly connected to the rear bracket (31), and the left end of the large particle debris material discharge slot body (85) is located below the rear end of the three-stage screening sleeve (35).

6. The plant seed screening device according to claim 5, characterized in that: The device also comprises a dust and debris blowing mechanism (7), wherein the dust and debris blowing mechanism (7) comprises a support rod (71), a guide channel (72), a wind direction adjustment component and a blower (75); the left sides of the two brackets (31) are respectively fixedly connected to two support rods (71); the guide channel (72) is connected between the two support rods (71) via the wind direction adjustment component; the blower (75) is installed at the left end of the guide channel (72); and the air outlet at the right end of the guide channel (72) faces the upper side of the arc receiving plate (81).

7. The plant seed screening device according to claim 2, characterized in that: The invention also comprises a knocking vibration mechanism (6), wherein the knocking vibration mechanism (6) comprises a support block (61), a knocking spring (62), a knocking ball (63) and a hemispherical block (64); the support block (61) is fixedly connected to the top of the rear support ring (32); the front side of the support block (61) is connected to the knocking ball (63) via the knocking spring (62); and a plurality of hemispherical blocks (64) are arranged in a circular array on the outer peripheral side of the secondary screening sleeve (34) corresponding to the position of the knocking ball (63).

8. The plant seed screening device according to claim 1, characterized in that: The invention also comprises a screening raw material quantity-controlled adding mechanism (9), the screening raw material quantity-controlled adding mechanism (9) comprising a support frame (91), an inclined channel (92) and a raw material adding bucket (93), the front end of the seat plate (1) being provided with an inclined channel (92) through the support frame (91), the inclined channel (92) being arranged with a high front and a low rear, the rear end of the inclined channel (92) extending into the anti-drop end sleeve (36), and the front end of the inclined channel (92) being fixedly connected to the raw material adding bucket (93).

9. The plant seed screening device according to claim 8, characterized in that: The screening raw material controlled addition mechanism (9) further comprises a gate plate (94) and a gate plate control assembly, the gate plate (94) being slidably connected in the upper guide groove of the inclined channel (92), and the top of the gate plate (94) being connected to the upper side of the inclined channel (92) via the gate plate control assembly.

10. The plant seed screening device according to claim 9, characterized in that: The screening raw material controlled addition mechanism (9) further comprises a feeding reciprocating plate (98), a feeding convex strip (99) and a reciprocating power assembly. A reciprocating groove is provided at the front bottom of the raw material addition bucket (93), and a feeding reciprocating plate (98) is slidably connected in the reciprocating groove. The rear end of the feeding reciprocating plate (98) is located at the bottom of the inclined channel (92). A plurality of feeding convex strips (99) are longitudinally arranged at equal distances on the upper side of the rear end of the feeding reciprocating plate (98), and the front end of the feeding reciprocating plate (98) is connected to the reciprocating power assembly.

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