Forestry seed screening device

Abstract

The invention relates to the field of seed screening devices, in particular to a forestry seed screening device which comprises a screening cylinder, a vibration motor is fixedly connected to the lower portion of the inner wall of the screening cylinder, a conical screen is movably connected to the rotating end of the vibration motor, and the forestry seed screening device further comprises a margin screening mechanism. According to the forestry seed screening device, after most qualified seeds are discharged, a small number of qualified seeds and a large number of unqualified seeds remain in the conical screen, at the moment, screening fan blades on the allowance screening mechanism drive the qualified seeds to roll and rise on the surface of the conical screen along a spiral track, and in the process, the qualified seeds are screened out; when the seed screening device is used, large-mass seeds are extruded, non-full and hollow seeds are deformed and broken under certain pressure and cannot rotate and ascend along with the screening fan blades, the non-full and hollow seeds can be removed, light-mass small seeds cannot enter the space between the conical screen and the side walls of the screening fan blades and are discharged along with the space, and the seed screening effect is further improved.

Description

Technical Field

[0001] This invention relates to the field of seed screening devices, specifically a forestry seed screening device. Background Technology

[0002] The quality of forestry seeds directly affects the growth, development, yield, and resistance of trees. Therefore, it is crucial to select healthy, plump seeds free from pests and diseases. Traditional methods of selecting forestry seeds often rely on manual selection or simple mechanical screening.

[0003] The following problems exist in the existing technology and have not been well resolved: 1. Since forestry seeds include heavy seeds and light seeds, heavy seeds are usually more plump and suitable for growth, while light seeds have poor plumpness and may be hollow, making them unsuitable for growth. Some existing screening devices remove hollow and light seeds through water selection and air selection. Water-selected seeds require subsequent drying, which is a complex process with a long screening cycle. Air-selected seeds tend to retain impurities with a weight similar to that of the seeds, and hollow seeds with a similar weight may also remain, affecting the screening quality. Some existing seed screening institutions are unable to effectively screen light and hollow seeds. Summary of the Invention

[0004] The purpose of this invention is to provide a forestry seed screening device to solve the problems mentioned in the background art: 1. Some existing seed screening devices are difficult to screen light seeds and hollow seeds. To achieve the above objective, this invention provides the following technical solution: a forestry seed screening device, including a screening cylinder, wherein a vibration motor is fixedly connected to the lower part of the inner wall of the screening cylinder, and a conical screen is movably connected to the rotating end of the vibration motor; It also includes: a residual screening mechanism, which is movably installed on the inner top surface of the screening cylinder, and is used to screen the remaining seeds in the conical screen. The bottom of the conical screen is movably equipped with a seed rejection mechanism, which can discharge qualified seeds from the bottom of the screening cylinder.

[0005] Preferably, the residual screening mechanism includes an electric telescopic rod, which is rotatably connected to the top of the screening cylinder. A support sleeve is fixedly connected to the movable end of the electric telescopic rod, and three screening fan blades are equidistantly installed on the outer ring of the support sleeve along the circumference. The fixed end of the electric telescopic rod is hinged with three connecting rods at equal intervals along the circumference, and the bottom of the three connecting rods is respectively hinged to the top of the three screening fan blades.

[0006] Preferably, a rubber pad is fixedly connected to the side of the screening fan blade near the support sleeve, and a guide hole is provided between the screening fan blade and the rubber pad; The surface of the support sleeve is fixedly connected to a guide rod that mates with a guide hole, and a tension spring is fixedly connected between the end of the guide rod and the inner wall of the corresponding guide hole. A spring stop bar is fixedly connected to the end of the screening fan blade away from the support sleeve, and the end of the spring stop bar overlaps with the inner wall of the conical screen.

[0007] Preferably, the upper part of the conical screen has six rectangular grooves equidistantly spaced along the circumference, and the outer wall of the upper part of the conical screen is movably fitted with a retaining ring that matches the rectangular grooves. The bottom of the retaining ring is fixedly connected to an electric pull rod, and the surface of the electric pull rod is fixedly connected to the surface of the conical screen.

[0008] Preferably, a drive motor is fixedly connected to the top of the screening cylinder, a drive gear is fixedly connected to the rotating end of the drive motor, and a driven gear is fixedly installed at the fixed end of the electric telescopic rod, with the side wall of the driven gear meshing with the side wall of the drive gear.

[0009] Preferably, the seed removal mechanism includes a support frame, which is fixedly connected to the lower part of the outer wall of the conical screen. One end of the support frame is rotatably connected to an adjusting cylinder that cooperates with the bottom of the conical screen. The top of the adjusting cylinder is provided with an arc-shaped adjusting groove. The bottom of the conical screen is fixedly connected to a connecting ring. The inner top surface of the connecting ring is provided with a sliding groove. A wedge-shaped baffle is slidably connected inside the sliding groove. The wedge-shaped baffle is disposed between the bottom of the connecting ring and the top of the adjusting cylinder. A sliding pin is fixedly connected to the surface of the wedge-shaped baffle. The top of the sliding pin is slidably disposed inside the sliding groove, and the bottom of the sliding pin is slidably connected inside the corresponding arc-shaped adjusting groove. An adjusting gear ring is fixedly sleeved in the middle of the outer wall of the adjusting cylinder, an adjusting motor is fixedly connected to the bottom of the support frame, a half gear rod is fixedly connected to the rotating end of the adjusting motor, and a transmission gear ring that cooperates with the adjusting gear ring is slidably arranged in the middle of the half gear rod. An adjustment component is movably connected between the side wall of the support frame and the surface of the transmission gear ring. The adjustment component is used to switch the position of the transmission gear ring.

[0010] Preferably, the adjusting assembly includes a transmission rod, the upper part of which is fixedly sleeved with a spherical gear that cooperates with the half gear rod, and the lower part of the transmission rod is provided with an adjusting arc groove; The lower part of the transmission rod is movably sleeved with an adjustment frame. The inner wall of the adjustment frame is fixedly connected with an adjustment pin that matches the adjustment arc groove. One side of the adjustment frame is movably sleeved on the surface of the half gear rod. The retaining sleeve on one side of the adjustment frame is between the top and bottom of the transmission gear ring. The support frame has a vertical groove on its side wall, and the other side of the adjustment frame is slidably disposed inside the vertical groove. The inner wall of the vertical groove is symmetrically and fixedly connected with helical teeth. The inner wall of the other side of the adjustment frame is symmetrically provided with movable grooves. A spring limiting sleeve that engages with the helical teeth is slidably arranged inside the movable groove. A compression spring is fixedly connected between one end of the spring limiting sleeve and the inner wall of the movable groove. A spring rod is movably inserted at the top of the adjusting frame. One end of the spring rod extends through the movable groove to the top of the spring limiting sleeve. A limiting ring groove is formed on the surface of the spring limiting sleeve. A T-shaped reset rod is vertically slidably arranged in the middle of the adjusting frame. A limiting insert plate that cooperates with the limiting ring groove is symmetrically fixedly connected to the top of the T-shaped reset rod.

[0011] Preferably, there are twelve sliding grooves, which are equidistantly arranged on the inner top surface of the connecting ring along the circumference. There are also twelve arc-shaped adjusting grooves, which are equidistantly arranged on the top of the adjusting cylinder along the circumference. The number of wedge-shaped baffles is the same as the number of arc-shaped adjusting grooves, and the wedge-shaped baffles are movably installed between the corresponding sliding grooves and arc-shaped adjusting grooves. A torsion spring is fixedly connected between the bottom of the adjusting cylinder and the surface of the support frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the combined use of components such as a screening cylinder, a conical screen, and a seed rejection mechanism ensures that, during the seed screening process, qualified heavy seeds accumulate at the bottom of the conical screen, while unqualified light seeds and hollow seeds accumulate at the top. The phased opening of the rejection mechanism effectively discharges the qualified seeds, and the range of the wedge-shaped baffles opened at each stage is different, ensuring that the discharge of unqualified seeds is reduced during the rejection of qualified seeds at different stages, thus improving the seed screening quality.

[0013] In this invention, through the combined use of components such as a vibrating motor, a conical screen, and a residual screening mechanism, after most of the qualified seeds are discharged, a small number of qualified seeds and a large number of unqualified seeds remain inside the conical screen. At this time, the screening blades on the residual screening mechanism carry the qualified seeds up along a spiral trajectory on the surface of the conical screen. During this process, the large-mass seeds are squeezed, and under a certain pressure, the unfulfilled and hollow seeds will deform and break, and will not be able to rise with the rotating screening blades. This can remove the unfulfilled and hollow seeds, and the light-mass small seeds cannot enter the space between the conical screen and the side wall of the screening blades and will be discharged with them, further improving the seed screening effect.

[0014] In this invention, the combined use of components such as the screening cylinder, the conical screen, and the screening fan blades allows the seeds inside the conical screen to be turned over during the downward rotation of the screening fan blades, thereby improving the stratification effect of the screening vibration. When the screening fan blades rise, a suction effect is generated as the electric telescopic rod rotates. The airflow force of this suction further lifts the light seeds to the surface, improving the stratification effect between heavy and light seeds. Attached Figure Description

[0015] Figure 1 This is a perspective view of the screening cylinder and the electric telescopic rod of the present invention; Figure 2 This is a cross-sectional view showing the positions of the screening cylinder and the electric telescopic rod in this invention. Figure 3 This is a cross-sectional view of a portion of the electric telescopic rod and the screening fan blades of the present invention; Figure 4 This is a perspective view of a portion of the conical screen and support frame of the present invention; Figure 5 This is a perspective view of a portion of the support frame and adjusting cylinder of the present invention; Figure 6 This is a cross-sectional view of a portion of the adjusting cylinder and the arc-shaped adjusting groove of the present invention; Figure 7 This is a bottom view of a portion of the connecting ring and the slide groove of the present invention; Figure 8 This is a bottom view of a portion of the position of the adjusting cylinder and the wedge-shaped baffle of the present invention; Figure 9 This is a bottom view of the wedge-shaped baffle in its moving state according to the present invention; Figure 10 This is a cross-sectional view of a portion of the support frame and adjustment frame of the present invention; Figure 11 This is a rear view of a portion of the support frame and the helical tooth of the present invention; Figure 12 This is a cross-sectional view of a portion of the adjusting frame of the present invention; Figure 13 For the present invention Figure 12 Enlarged view of the structure at point A in the middle; Figure 14 This is a cross-sectional view of a portion of the transmission rod and the adjusting groove of the present invention.

[0016] In the diagram: 1. Screening cylinder; 2. Vibrating motor; 3. Conical screen; 4. Residual screening mechanism; 401. Electric telescopic rod; 402. Support sleeve; 403. Screening fan blade; 404. Connecting rod; 5. Seed removal mechanism; 501. Support frame; 502. Adjusting cylinder; 503. Arc-shaped adjusting groove; 504. Connecting ring; 505. Sliding groove; 506. Wedge baffle; 507. Sliding pin; 508. Adjusting gear ring; 509. Adjusting motor; 510. Half gear rod; 511. Transmission gear ring; 512. Adjusting assembly; 5121. Transmission rod; 5122. Circular gear; 5123. Adjusting arc groove; 5124. Adjusting frame; 5125. Adjusting pin; 5126. Helical tooth; 5127. Spring limiting sleeve; 5128. Spring pressure rod; 5129. T-shaped reset rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1 to 14 This invention provides a technical solution: a forestry seed screening device, including a screening cylinder 1. A vibration motor 2 is fixedly connected to the lower part of the inner wall of the screening cylinder 1, and a conical screen 3 is movably connected to the rotating end of the vibration motor 2. It should be noted that the conical screen 3 can remove small particles and foreign matter remaining inside the seeds. The vibration motor 2 drives the conical screen 3 to shake inside the screening cylinder 1, thus performing the seed screening operation. The structure of the conical screen 3 and the usage of the vibration motor 2 are existing technologies and will not be described in detail here.

[0019] It also includes a residual screening mechanism 4, which is movably installed on the inner top surface of the screening cylinder 1. The residual screening mechanism 4 is used to screen the remaining seeds in the conical screen 3. It should be noted that: usually, qualified forestry seeds are heavier than unqualified seeds due to their high plumpness and large size. Under the action of the conical screen 3, when the conical screen 3 vibrates, the heavier seeds, due to their greater gravity, will continuously "squeeze" the lighter seeds downwards during the vibration, occupying a more stable lower layer space. The lighter seeds, due to their insufficient gravity, are unable to resist this compression and are gradually "squeezed" to the top of the accumulation layer, achieving the effect of seed stratification. This device is suitable for screening and processing circular forestry seeds.

[0020] A seed rejection mechanism 5 is movably installed at the bottom of the conical screen 3, which can discharge qualified seeds from the bottom of the screening cylinder 1.

[0021] In this embodiment, as Figures 1 to 14 As shown, the residual screening mechanism 4 includes an electric telescopic rod 401, which is rotatably connected to the top of the screening cylinder 1. The movable end of the electric telescopic rod 401 is fixedly connected to a support sleeve 402, and three screening fan blades 403 are equidistantly installed on the outer ring of the support sleeve 402 along the circumference. It should be noted that: the electric telescopic rod 401 can bring the screening blades 403 into the interior of the conical screen 3. When the electric telescopic rod 401 rotates with the screening blades 403, it can turn over the vibrating seeds and improve the seed vibration screening effect. When the conical screen 3 stops vibrating, the electric telescopic rod 401 moves down to the limit position with the screening blades 403 and then rotates. At this time, under the action of the arc contour of the outer wall of the screening blades 403, the screening blades 403 can press the qualified seeds between the side wall of the screening blades 403 and the inner wall of the conical screen 3. When the electric telescopic rod 401 retracts, the screening blades 403 rotate and bring the squeezed qualified seeds to the upper position of the conical screen 3 for discharge.

[0022] The fixed end of the electric telescopic rod 401 is hinged with three connecting rods 404 at equal intervals along the circumference. The bottom of the three connecting rods 404 is hinged to the top of the three screening blades 403 respectively. It should be noted that when the electric telescopic rod 401 retracts, under the action of the connecting rods 404, the screening blades 403 slowly slide horizontally on the side wall of the support sleeve 402, so that the screening blades 403 can always maintain an effective distance from the surface of the conical screen 3. This ensures that qualified seeds are always in contact with the screening blades 403 and the conical screen 3. During this process, unqualified seeds are easily crushed under compression and cannot rise with the screening blades 403, which can effectively improve the rejection of unqualified seeds.

[0023] In this embodiment, as Figures 1 to 14 As shown, a rubber pad is fixedly connected to the side of the screening blade 403 near the support sleeve 402, and a guide hole is provided between the screening blade 403 and the rubber pad. It should be noted that the rubber pad is designed to prevent excessive squeezing pressure from damaging qualified seeds and to improve screening stability.

[0024] The surface of the support sleeve 402 is fixedly connected with a guide rod that mates with the guide hole, and a tension spring is fixedly connected between the end of the guide rod and the inner wall of the corresponding guide hole.

[0025] A spring stop is fixedly connected to the end of the screening blade 403 away from the support sleeve 402, and the end of the spring stop overlaps with the inner wall of the conical screen 3. It should be noted that when qualified seeds are between the side wall of the screening blade 403 and the conical screen 3, the spring stop can block the qualified seeds during the rotation of the screening blade 403, preventing the qualified seeds from falling out, and ensuring that the qualified seeds are discharged from the upper position of the conical screen 3 after moving upward with the rotating screening blade 403.

[0026] In this embodiment, as Figures 1 to 14 As shown, the upper part of the conical screen 3 has six rectangular slots equidistantly spaced along its circumference. A retaining ring that mates with the rectangular slots is movably fitted onto the outer wall of the upper part of the conical screen 3. An electric pull rod is fixedly connected to the bottom of the retaining ring, and the surface of the electric pull rod is fixedly connected to the surface of the conical screen 3. It should be noted that the electric pull rod is of the type 401 electric telescopic rod. When the screening fan blade 403 rotates and carries qualified seeds upwards, the electric pull rod pulls the retaining ring to move and releases the obstruction to the rectangular slots, allowing the rising qualified seeds to be discharged from the rectangular slots.

[0027] In this embodiment, as Figures 1 to 14 As shown, a drive motor is fixedly connected to the top of the screening cylinder 1, and a drive gear is fixedly connected to the rotating end of the drive motor. A driven gear is fixedly installed at the fixed end of the electric telescopic rod 401, and the side wall of the driven gear meshes with the side wall of the drive gear. It should be noted that: by the drive motor driving the drive gear to mesh with the driven gear, the electric telescopic rod 401 and the screening fan blade 403 can rotate inside the screening cylinder 1. When the electric telescopic rod 401 is in the retracted state and is rotating with the screening fan blade 403, the rotation of the screening fan blade 403 causes the airflow above the conical screen 3 to generate a certain suction force. This suction force can further enhance the floating effect of light seeds and improve the efficiency of stratified screening of heavy and light seeds.

[0028] In this embodiment, as Figures 1 to 14 As shown, the seed removal mechanism 5 includes a support frame 501, which is fixedly connected to the lower part of the outer wall of the conical screen 3. One end of the support frame 501 is rotatably connected to an adjusting cylinder 502 that cooperates with the bottom of the conical screen 3. An arc-shaped adjusting groove 503 is provided on the top of the adjusting cylinder 502.

[0029] A connecting ring 504 is fixedly connected to the bottom of the conical screen 3. A groove 505 is formed on the inner top surface of the connecting ring 504. A wedge-shaped baffle 506 is slidably connected inside the groove 505. The wedge-shaped baffle 506 is positioned between the bottom of the connecting ring 504 and the top of the adjusting cylinder 502. A sliding pin 507 is fixedly connected to the surface of the wedge-shaped baffle 506. The top of the sliding pin 507 is slidably positioned inside the groove 505, and the bottom of the sliding pin 507 is slidably connected inside the corresponding arc-shaped adjusting groove 503. It should be noted that the bottom of the conical screen 3 has a circular hole that mates with the connecting ring 504. When the adjusting cylinder 502 rotates, the adjusting cylinder 502, along with the arc-shaped adjusting groove 503, slides in conjunction with the sliding pin 507, causing the sliding pin 507 to slide along the trajectory of the wedge-shaped baffle 506 along the groove 505. At this time, the wedge-shaped baffle 506 releases its obstruction of the circular hole, discharging the qualified seeds screened at the bottom of the conical screen 3.

[0030] An adjusting gear ring 508 is fixedly sleeved on the middle of the outer wall of the adjusting cylinder 502. An adjusting motor 509 is fixedly connected to the bottom of the support frame 501. A half gear rod 510 is fixedly connected to the rotating end of the adjusting motor 509. A transmission gear ring 511 that cooperates with the adjusting gear ring 508 is slidably arranged in the middle of the half gear rod 510. It should be noted that: a moving groove is symmetrically opened in the middle of the half gear rod 510. A moving block is symmetrically fixedly connected to the inner ring of the transmission gear ring 511. The transmission gear ring 511 is slidably arranged inside the moving groove through the moving block. Three half teeth of different lengths are arranged sequentially on the surface of the transmission gear ring 511, from top to bottom: long half tooth, slightly shorter half tooth, and short half tooth. Whenever the adjusting motor 509 rotates the half gear rod one revolution, the half tooth on the transmission gear ring 511 meshes with the adjacent adjusting gear ring 508, causing the adjusting gear ring 508 to deflect the adjusting cylinder 502 once at the bottom of the connecting ring 504.

[0031] An adjusting component 512 is movably connected between the side wall of the support frame 501 and the surface of the transmission gear ring 511. The adjusting component 512 is used to switch the position of the transmission gear ring 511. It should be noted that: because the three half teeth on the surface of the transmission gear ring 511 have different lengths, when the height position of the transmission gear ring 511 is switched under the action of the adjusting component 512, the angle of rotation of the adjusting gear ring 508 and the transmission gear ring 511 will also change, thereby changing the angle of opening of the wedge baffle 506. Since the first discharge of the conical screen 3 has the most qualified seeds, and the second and third discharges of qualified seeds gradually decrease, a large number of unqualified seeds remain inside the conical screen 3. Therefore, the opening range of the bottom discharge of the conical screen 3 can be controlled according to different screening stages to ensure that qualified seeds are effectively discharged. The remaining large number of unqualified seeds and a small number of qualified seeds are screened out by the residual screening mechanism 4.

[0032] In this embodiment, as Figures 1 to 14 As shown, the adjusting assembly 512 includes a transmission rod 5121. A spur gear 5122, which meshes with the half-gear rod 510, is fixedly sleeved on the upper part of the transmission rod 5121. An adjusting arc groove 5123 is provided on the lower part of the transmission rod 5121. It should be noted that there can be two adjusting arc grooves 5123 and two adjusting pins 5125. The two adjusting arc grooves 5123 are symmetrically arranged on the surface of the transmission rod 5121, which can improve the upward stability of the adjusting frame 5124.

[0033] The lower part of the transmission rod 5121 is movably sleeved with an adjusting frame 5124. The inner wall of the adjusting frame 5124 is fixedly connected with an adjusting pin 5125 that cooperates with the adjusting arc groove 5123. One side of the adjusting frame 5124 is movably sleeved on the surface of the half gear rod 510. The sleeve on one side of the adjusting frame 5124 is between the top and bottom of the transmission gear ring 511. It should be noted that: a return spring is movably connected between the top of the adjusting frame 5124 and the upper part of the transmission rod 5121. When the adjusting frame 5124 is unlocked, the return spring moves the adjusting frame 5124 down to reset. When the adjusting motor 509 rotates the half gear rod 510 once, the half gear rod 510 meshes with the spur gear 5122 once, causing the spur gear 5122 to deflect the transmission rod 5121 once. At this time, the adjusting arc groove 5123 on the transmission rod 5121 slides with the adjusting pin 5125 on the inner ring of the adjusting frame 5124, causing the adjusting frame 5124 to move once on the surface of the transmission rod 5121. During this process, the adjusting frame 5124 can move the transmission gear ring 511 on the surface of the half gear rod 510 to switch the position of the half teeth. Thus, when the adjusting motor 509 rotates once to drive the wedge baffle 506 to open, the transmission gear ring 511 will rise once to switch the position, changing the opening angle of the wedge baffle 506 next time, thus controlling the opening range.

[0034] The support frame 501 has a vertical groove on its side wall, and the other side of the adjusting frame 5124 is slidably disposed inside the vertical groove. The inner wall of the vertical groove is symmetrically fixedly connected with helical teeth 5126. It should be noted that the side of the adjusting frame 5124 near the transmission gear ring 511 is U-shaped. Through this U-shaped structure, the adjusting frame 5124 is fitted between the top and bottom of the transmission gear ring 511. When the adjusting frame 5124 moves up and down, it can slide vertically on the surface of the half gear rod 510 along with the transmission gear ring 511.

[0035] The inner wall of the other side of the adjusting frame 5124 is symmetrically provided with movable grooves. A spring limiting sleeve 5127 that cooperates with the helical tooth 5126 is slidably arranged inside the movable groove. A compression spring is fixedly connected between one end of the spring limiting sleeve 5127 and the inner wall of the movable groove.

[0036] A spring rod 5128 is movably inserted into the top of the adjusting frame 5124. One end of the spring rod 5128 extends through the movable groove to the top of the spring limiting sleeve 5127. A limiting ring groove is formed on the surface of the spring limiting sleeve 5127. A T-shaped reset rod 5129 is vertically slidably arranged in the middle of the adjusting frame 5124. A limiting insert plate that cooperates with the limiting ring groove is symmetrically fixedly connected to the top of the T-shaped reset rod 5129. It should be noted that the spring limiting sleeve 5127 is tapered on one side inside the movable groove. When the adjusting frame 5124 rises to its limit position inside the vertical groove, the spring pressure rod 5128 contacts and is pressed against the top surface of the vertical groove, causing the bottom of the spring pressure rod 5128 to press against the tapered surface of the spring limiting sleeve 5127. At this time, the limiting ring groove on the surface of the spring limiting sleeve 5127 moves to the limiting insert plate position and engages and locks, releasing the end of the spring limiting sleeve 5127 from the engagement and limiting of the helical tooth 5126. At this time, the return spring carries the adjusting frame 5124 to its limit position. 24. After the adjusting frame 5124 moves down to its limit position, the bottom of the T-shaped reset rod 5129 is pressed, causing the T-shaped reset rod 5129 to rise with the limit plate and disengage from the limit ring groove. At this time, the compression spring resets the spring limit sleeve 5127, and after the spring limit sleeve 5127 is reset, it is re-inserted into the position of the helical tooth 5126. At this point, when the adjusting frame 5124 rises with the transmission gear ring 511 to its limit position, the adjusting component 512 can be triggered and the adjusting frame 5124 moves down with the transmission gear ring 511 to reset.

[0037] In this embodiment, as Figures 1 to 14 As shown, there are twelve swivel grooves 505, which are equidistantly spaced along the circumference on the inner top surface of the connecting ring 504. There are also twelve arc-shaped adjusting grooves 503, which are equidistantly spaced along the circumference on the top of the adjusting cylinder 502. The number of wedge-shaped baffles 506 is the same as the number of arc-shaped adjusting grooves 503, and the wedge-shaped baffles 506 are movably installed between the corresponding swivel grooves 505 and arc-shaped adjusting grooves 503. It should be noted that the twelve wedge-shaped baffles 506 work together to shield the bottom of the conical screen 3.

[0038] A torsion spring is fixedly connected between the bottom of the adjusting cylinder 502 and the surface of the support frame 501. It should be noted that when the half-gear rod 510 disengages from the adjusting gear ring 508 along with the transmission gear ring 511, the torsion spring causes the adjusting cylinder 502 to rotate and reset, allowing the offset wedge-shaped baffle 506 to return to its original position and block the bottom of the conical screen 3 again. An electric push rod is fixedly connected to the side of the conical screen 3 away from the support frame 501. One end of the electric push rod is fixedly connected to an adjusting rack that engages with the adjusting gear ring 508. The electric push rod drives the adjusting rack to engage with the adjusting gear ring 508, causing the adjusting gear ring 508 to rotate along with the adjusting cylinder 502, discharging any remaining unqualified seeds and fragments inside the conical screen 3.

[0039] The method of use and advantages of this invention: The working process of this forestry seed screening device is as follows: like Figures 1 to 14 As shown, during use, seeds are first placed inside the conical screen 3, and then the vibration motor 2 is started to vibrate and screen the conical screen 3. During this process, the electric telescopic rod 401 is extended, and the drive motor drives the drive gear and the driven gear to rotate the electric telescopic rod 401 and the screening fan blade 403. The screening fan blade 403 moves down to the upper part of the inner wall of the conical screen 3 to stir the seeds at a low speed, so that the seeds can be turned over during the screening process, which improves the stratification effect of heavy and light seeds. After the screening fan blade 403 stirs for a while, the electric telescopic rod 401 retracts. At this time, the screening fan blade 403 located at the upper part of the inner wall of the screening cylinder 1 will drive the airflow at the top of the conical screen 3 to generate a certain suction force during rotation. This suction force can further enhance the floating effect of light seeds and improve the stratification efficiency of heavy and light seeds. After the conical screen 3 vibrates for a limited time, small particles of impurities inside the seeds are discharged from the sieve holes on the side wall of the conical screen 3. At this time, the heavy seeds accumulate at the lower part of the conical screen 3. Then, the regulating motor 509 is started to rotate the half gear rod 510 one revolution. At this time, the long half tooth on the surface of the transmission gear ring 511 on the half gear rod 510 meshes with the adjacent regulating gear ring 508, causing the regulating gear ring 508 to deflect the regulating cylinder 502 at the bottom of the connecting ring 504. At this time, the arc-shaped regulating groove 503 on the surface of the regulating cylinder 502... The sliding pin 507 slides in conjunction with the sliding pin 507, causing the sliding pin 507 to slide with the wedge baffle 506 inside the sliding groove 505. The twelve wedge baffles 506 slide synchronously to the maximum position, releasing the obstruction of the bottom of the conical screen 3, allowing a large number of qualified seeds accumulated at the bottom of the conical screen 3 to be discharged. When the half tooth on the transmission gear ring 511 disengages from the adjusting gear ring 508, the torsion spring causes the adjusting cylinder 502 to reverse and reset, causing the wedge baffle 506 to obstruct the bottom of the conical screen 3 again. Then, the vibration motor 2 is started to continue vibrating and screening. During one rotation of the half-gear rod 510, it meshes with the adjacent spur gear 5122, causing the spur gear 5122 to rotate once with the transmission rod 5121. During the sliding process of the adjusting groove 5123 and the adjusting pin 5125 on the inner ring of the adjusting frame 5124, the adjusting pin 5125 slides upward along the trajectory of the adjusting groove 5123, causing the adjusting frame 5124 to move the transmission gear ring 511 once on the surface of the half-gear rod 510. This causes the slightly shorter half-tooth in the middle of the transmission gear ring 511 to move to the side wall position of the adjusting gear ring 508. When the conical screen 3... After the vibration stops, the regulating motor 509 is restarted to rotate the half gear rod 510 one revolution. At this time, the slightly shorter half tooth in the middle of the transmission gear ring 511 meshes with the regulating gear ring 508, causing the angle of the regulating cylinder 502 to change. Then, the opening range of the twelve wedge baffles 506 is reduced. Since the remaining qualified seeds inside the conical screen 3 are reduced at this time, the amount of seeds discharged from the bottom of the conical screen 3 is automatically reduced. At this point, when the transmission gear ring 511 rises again, the discharge range of the wedge baffles 506 is even smaller under the action of the short half tooth. As the adjusting frame 5124 moves upward in stages at the vertical groove position on the side wall of the support frame 501, and the adjusting frame 5124 is unidirectionally limited by the engagement of the end of the spring limiting sleeve 5127 on the side wall with the helical tooth 5126, when the adjusting frame 5124 moves upward with the spring pressure rod 5128 to the top surface position inside the vertical groove, the spring pressure rod 5128 is compressed and presses against the conical surface position of the spring limiting sleeve 5127, causing the spring limiting sleeve 5127 to move with the limiting ring groove to the limiting insert plate position. And engage with the limit position. At this time, the end of the spring limit sleeve 5127 is released from engagement with the helical tooth 5126, so that the return spring can move down with the adjustment frame 5124 to return to the initial position. As the adjustment frame 5124 moves down, the bottom of the T-shaped reset rod 5129 is pressed, so that the T-shaped reset rod 5129 moves up with the limit plate and releases engagement with the limit ring groove. At this time, the compression spring moves the spring limit sleeve 5127 to reset and engage again with the corresponding helical tooth 5126 position. When a small number of qualified seeds and a large number of unqualified seeds remain inside the conical screen 3, the vibration motor 2 is turned off, and then the electric telescopic rod 401 is started to move the screening fan blade 403 down to its limit position. During this process, the screening fan blade 403 rotates with the electric telescopic rod 401. At this time, the qualified seeds are guided by the arc surface of the rotating screening fan blade 403, so that the qualified seeds enter between the side wall of the screening fan blade 403 and the inner wall of the conical screen 3 and are pressed against its surface. When the electric telescopic rod 401 retracts, the qualified seeds roll synchronously along the surface of the conical screen 3 with the rotating and rising screening fan blade 403 in a spiral trajectory to the rectangular groove position and are discharged. The unqualified hollow seeds are broken during the squeezing of the screening fan blade 403 and the friction of the surface of the conical screen 3, and the small-diameter unfilled seeds cannot be squeezed onto the surface of the conical screen 3 and remain inside the conical screen 3. After the qualified seeds are screened, the wedge baffle 506 is opened to discharge the unqualified seeds and fragments.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forestry seed screening device, comprising a screening cylinder (1), wherein a vibration motor (2) is fixedly connected to the lower part of the inner wall of the screening cylinder (1), and a conical screen (3) is movably connected to the rotating end of the vibration motor (2). Its features are, Also includes: The residual screening mechanism (4) is movably installed on the inner top surface of the screening cylinder (1). The residual screening mechanism (4) is used to screen the remaining seeds in the conical screen (3). The bottom of the conical screen (3) is movably equipped with a seed removal mechanism (5), which can discharge qualified seeds from the bottom of the screening cylinder (1).

2. The forestry seed screening device according to claim 1, characterized in that: The residual screening mechanism (4) includes an electric telescopic rod (401), which is rotatably connected to the top of the screening cylinder (1). The movable end of the electric telescopic rod (401) is fixedly connected to a support sleeve (402), and three screening fan blades (403) are equidistantly installed on the outer ring of the support sleeve (402) along the circumference. The fixed end of the electric telescopic rod (401) is hinged with three connecting rods (404) at equal intervals along the circumference, and the bottom of the three connecting rods (404) is respectively hinged to the top of the three screening fan blades (403).

3. The forestry seed screening device according to claim 2, characterized in that: A rubber pad is fixedly connected to the side of the screening fan blade (403) near the support sleeve (402), and a guide hole is provided between the screening fan blade (403) and the rubber pad; The surface of the support sleeve (402) is fixedly connected with a guide rod that mates with the guide hole, and a tension spring is fixedly connected between the end of the guide rod and the inner wall of the corresponding guide hole. A spring stop bar is fixedly connected to one end of the screening fan blade (403) away from the support sleeve (402), and the end of the spring stop bar overlaps with the inner wall of the conical screen (3).

4. The forestry seed screening device according to claim 3, characterized in that: The upper part of the conical screen (3) has six rectangular grooves equidistantly spaced along the circumference. The outer wall of the upper part of the conical screen (3) is movably fitted with a retaining ring that matches the rectangular groove. The bottom of the retaining ring is fixedly connected to an electric pull rod, and the surface of the electric pull rod is fixedly connected to the surface of the conical screen (3).

5. A forestry seed screening device according to claim 4, characterized in that: A drive motor is fixedly connected to the top of the screening cylinder (1), and a drive gear is fixedly connected to the rotating end of the drive motor. A driven gear is fixedly installed at the fixed end of the electric telescopic rod (401), and the side wall of the driven gear meshes with the side wall of the drive gear.

6. The forestry seed screening device according to claim 5, characterized in that: The seed removal mechanism (5) includes a support frame (501), which is fixedly connected to the lower part of the outer wall of the conical screen (3). One end of the support frame (501) is rotatably connected to an adjusting cylinder (502) that cooperates with the bottom of the conical screen (3). An arc-shaped adjusting groove (503) is provided on the top of the adjusting cylinder (502). The bottom of the conical screen (3) is fixedly connected to a connecting ring (504). The inner top surface of the connecting ring (504) is provided with a sliding groove (505). A wedge-shaped baffle (506) is slidably connected inside the sliding groove (505). The wedge-shaped baffle (506) is disposed between the bottom of the connecting ring (504) and the top of the adjusting cylinder (502). A sliding pin (507) is fixedly connected to the surface of the wedge-shaped baffle (506). The top of the sliding pin (507) is slidably disposed inside the sliding groove (505), and the bottom of the sliding pin (507) is slidably connected inside the corresponding arc-shaped adjusting groove (503). An adjusting gear ring (508) is fixedly sleeved in the middle of the outer wall of the adjusting cylinder (502). An adjusting motor (509) is fixedly connected to the bottom of the support frame (501). A half gear rod (510) is fixedly connected to the rotating end of the adjusting motor (509). A transmission gear ring (511) that cooperates with the adjusting gear ring (508) is slidably arranged in the middle of the half gear rod (510). An adjustment component (512) is movably connected between the side wall of the support frame (501) and the surface of the transmission gear ring (511). The adjustment component (512) is used to switch the position of the transmission gear ring (511).

7. A forestry seed screening device according to claim 6, characterized in that: The adjustment assembly (512) includes a transmission rod (5121), the upper part of which is fixedly sleeved with a spur gear (5122) that cooperates with the half gear rod (510), and the lower part of the transmission rod (5121) is provided with an adjustment arc groove (5123). The lower part of the transmission rod (5121) is movably sleeved with an adjusting frame (5124). The inner wall of the adjusting frame (5124) is fixedly connected with an adjusting pin (5125) that cooperates with the adjusting arc groove (5123). One side of the adjusting frame (5124) is movably sleeved on the surface of the half gear rod (510). The retaining sleeve on one side of the adjusting frame (5124) is between the top and bottom of the transmission gear ring (511). The support frame (501) has a vertical groove on its side wall, and the other side of the adjustment frame (5124) is slidably disposed inside the vertical groove. The inner wall of the vertical groove is symmetrically fixedly connected with helical teeth (5126). The inner wall of the other side of the adjusting frame (5124) is symmetrically provided with movable grooves. A spring limiting sleeve (5127) that cooperates with the helical tooth (5126) is slidably arranged inside the movable groove. A compression spring is fixedly connected between one end of the spring limiting sleeve (5127) and the inner wall of the movable groove. A spring rod (5128) is movably inserted into the top of the adjusting frame (5124). One end of the spring rod (5128) extends through the movable groove to the top of the spring limiting sleeve (5127). A limiting ring groove is formed on the surface of the spring limiting sleeve (5127). A T-shaped reset rod (5129) is vertically slidably arranged in the middle of the adjusting frame (5124). A limiting insert plate that cooperates with the limiting ring groove is symmetrically fixedly connected to the top of the T-shaped reset rod (5129).

8. A forestry seed screening device according to claim 7, characterized in that: The slide groove (505) is provided in twelve places, and the twelve slide grooves (505) are equally spaced along the circumference on the inner top surface of the connecting ring (504). The arc-shaped adjustment groove (503) is provided in twelve places, and the twelve arc-shaped adjustment grooves (503) are equally spaced along the circumference on the top of the adjustment cylinder (502). The number of wedge-shaped baffles (506) is the same as the number of arc-shaped adjustment grooves (503). The wedge-shaped baffles (506) are movably installed between the corresponding slide grooves (505) and arc-shaped adjustment grooves (503). A torsion spring is fixedly connected between the bottom of the adjusting cylinder (502) and the surface of the support frame (501).

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