Pot seedling detection and supplement seedling test device for plug seedling transplanter

Abstract

The utility model provides a pot seedling detection and supplement seedling test device of a plug seedling transplanter, and relates to the field of agricultural machinery. The device comprises a supporting frame, a conveying mechanism, seedling cups, a seedling removing mechanism and a seedling supplementing mechanism. The seedling cups are driven by the conveying mechanism to move along an annular track from an initial position; for unqualified pot seedlings or seedling cups without seedlings, the seedling picking mechanism and the seedling supplementing mechanism are respectively utilized to realize seedling picking and seedling supplementing operations; according to the scheme, inferior seedlings and seedling leakage in the seedling cup can be avoided, and seedling missing in a planting plot is avoided; the transplanting efficiency is improved, and the transplanting effect and planting income are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of agricultural machinery, concretely relates to a pot seedling detection and replanting test device of plug seedling transplanting machine. BACKGROUND

[0002] The plug seedling technology and the mechanized transplanting of plug seedlings play a crucial role in promoting the development of China's vegetable industry. The vegetable seedling transplanting technology not only can improve the multiple cropping index, but also can effectively reduce the influence of diseases, pests and weeds, and thus improve the yield and quality of vegetables. This technology has been widely popularized and applied in China. At present, China's vegetable transplanting operation mainly relies on manual transplanting and semi-automatic transplanting technology. Although the semi-automatic transplanting technology has strong adaptability to plug seedlings, it still needs manual seedling taking and feeding operation, and the transplanting machine only completes the automatic planting action. However, the manual seedling taking method has several shortcomings: first, during the movement of the transplanting machine, due to the factors such as body shaking and rotation of the seedling feeding device, the manual seedling taking and feeding operation becomes inconvenient; second, when the operator directly contacts the seedlings, due to the adhesion between the plug seedling pot body and the plug, the seedling stems and leaves are easily broken, thereby increasing the seedling damage rate; third, the manual seedling taking method is high in cost and low in efficiency, especially when the transplanting machine moves at a high speed, the manual seedling taking and feeding operation is difficult to complete in time, resulting in an increase in the seedling missing rate. In addition, workers are prone to fatigue and dizziness after a long time of work, which further aggravates the problems of missing and damaging seedlings. In contrast, the application of fully automatic transplanting machine can significantly improve the transplanting efficiency and quality, reduce the labor intensity of workers and production cost, and therefore it represents the future development trend of vegetable transplanting operation. SUMMARY

[0003] The utility model aims at providing a pot seedling detection and replanting test device of plug seedling transplanting machine, which solves the problems of high cost and low efficiency of the manual seedling taking method in the prior art.

[0004] In order to achieve the above purpose, the pot seedling detection and replanting test device of plug seedling transplanting machine provided by the utility model comprises a support frame, a conveying mechanism, seedling cups, a seedling removing mechanism and a seedling replanting mechanism.

[0005] The support frame comprises cross beams and vertical columns, a plurality of cross beams are arranged in a rectangular structure, and a plurality of vertical columns are arranged at the bottom of the cross beams.

[0006] The conveying mechanism is arranged on the cross beam.

[0007] A plurality of seedling cups are connected with the conveying mechanism, and the seedling cups can move along a circular track under the driving of the conveying mechanism.

[0008] The lower opening position of the seedling cup is provided with a pot seedling releasing mechanism for closing the opening to carry the pot seedling or opening the lower opening to release the pot seedling;

[0009] The seedling removing mechanism is located at one side of the conveying mechanism and is used for driving the pot seedling releasing mechanism to open the lower opening to release the pot seedling;

[0010] The seedling supplementing mechanism is arranged downstream of the seedling removing mechanism and above the moving track of the seedling cup and is used for supplementing the pot seedling to the upper opening of the seedling cup.

[0011] Further, the conveying mechanism comprises a driving device, a driving gear, a plurality of driven gears and a chain;

[0012] The driving gear and the driven gears are rotatably mounted above the crossbeam by shafts respectively, the driving gear and the plurality of driven gears are driven by the chain, and a ring-shaped conveying track is formed;

[0013] The driving device is arranged on the crossbeam and is used for being connected with the driving gear;

[0014] The seedling cup is fixedly mounted on the outside of the chain, so that the plurality of seedling cups are driven by the chain to make rotary motion on the running track.

[0015] Further, the pot seedling releasing mechanism comprises two rotating assemblies arranged on the opposite side walls of the seedling cup and baffle assemblies connected with the rotating assemblies respectively;

[0016] The rotating assembly comprises a rotating shaft, a shaft seat, a linkage plate and a torsion spring;

[0017] The rotating shaft is connected with the side wall of the seedling cup by the shaft seat;

[0018] The rotating shaft is connected with the linkage plate at two ends respectively, the linkage plate is provided with a gear tooth at an end away from the rotating shaft, and the linkage plates in the two rotating assemblies are linked by the gear teeth;

[0019] The baffle assembly is fixedly connected with the rotating shaft, and an end of any baffle assembly is provided with a connecting rod with a limiting bearing;

[0020] The torsion spring is sleeved on the rotating shaft, and two spring legs of the torsion spring are in contact with the side wall of the seedling cup and the side wall of the baffle assembly respectively, so that the two baffle assemblies are in a normally closed state.

[0021] Further, the seedling removing mechanism comprises a seedling cup fixing frame, a push plate support, a push plate and a seedling removing cylinder;

[0022] The seedling cup fixing frame is arranged on the cross beam and has a channel for passing through the seedling cup.

[0023] The sidewalls of the seedling cup are respectively provided with positioning blocks for contacting the support frame.

[0024] The push plate support is arranged on the support frame, and the inner side of the push plate support is provided with a transverse limiting rod, the upper side of the limiting rod and the upper end inner wall of the push plate support form a moving space for passing through the push plate.

[0025] One end of the push plate is connected with the telescopic rod of the seedling removing air cylinder through a movable connecting piece, and the other end of the push plate passes through the moving space for contacting and pressing down the limiting bearing, so that the pot seedling releasing mechanism can open the lower opening.

[0026] Further, the other end of the push plate is provided with a transition plate on both sides in the direction of the seedling cup moving track, and the lower end surface of the transition plate is used for contacting the limiting bearing.

[0027] Further, the seedling removing mechanism further comprises a base sliding block and a guide rail.

[0028] The guide rail is connected with the inner side of the cross beam, the base sliding block is slidingly connected with the guide rail, and the seedling removing air cylinder is connected with the base sliding block.

[0029] Further, the seedling supplementing mechanism comprises a seedling supplementing support, a seedling supplementing cup, a seedling supplementing air cylinder, an air cylinder connecting seat, a connecting rod and a movable baffle.

[0030] The seedling supplementing cup is fixed on the seedling supplementing support, and the seedling supplementing air cylinder is connected with the inner side of the seedling supplementing cup through an air cylinder base.

[0031] The telescopic rod of the seedling supplementing air cylinder moves downward and upward, and the air cylinder connecting seat is connected with the end of the telescopic rod.

[0032] The opposite sidewalls at the lower opening of the seedling supplementing cup are respectively hinged with the movable baffles through shafts, the two ends of the connecting rod are respectively hinged with the air cylinder connecting seat and the movable baffle, and when the telescopic rod of the seedling supplementing air cylinder moves, the movable baffle can be driven to open or close the lower opening of the seedling supplementing cup.

[0033] Further, the seedling unloading mechanism is arranged downstream of the seedling supplementing mechanism.

[0034] The seedling unloading mechanism comprises a seedling unloading support, a guide plate and a seedling cup support frame.

[0035] The unloading bracket is L-shaped, the vertical bracket is connected with the crossbeam, the horizontal bracket is flat and faces the seedling cup, the two sides of the horizontal bracket in the direction of the seedling cup moving track are provided with the guide plates for contacting the limiting bearing, and the movable baffle is opened by the downward pressure of the limiting bearing on the guide plates and the horizontal bracket; the seedling cup support frame is arranged on the crossbeam, and the seedling cup support frame has a channel for passing the seedling cup.

[0036] Further, the seedling cup fixing frame is detachably connected with the crossbeam through bolts, so that the spacing of the channel for passing the seedling cup is adjustable.

[0037] Further, the seedling cup fixing frame is detachably connected with the crossbeam through bolts, so that the spacing of the channel for passing the seedling cup is adjustable.

[0038] With the technical scheme, the plug seedling detection and bad seedling removing and supplementing test device has the following technical effects compared with the prior art:

[0039] In the scheme, the seedling cup is moved along the annular track from the initial position under the driving of the conveying mechanism; when the seedling cup rotates into the area where the bad seedling removing mechanism is located, for the unqualified plug seedling or the seedling cup with missing seedlings, the bad seedling removing mechanism drives the plug seedling releasing mechanism to open the lower opening to release the plug seedling, and the bad seedling is removed; when the seedling cup continues to rotate into the area where the seedling supplementing mechanism is located, for the unqualified plug seedling or the seedling cup with missing seedlings, the seedling supplementing mechanism supplements the plug seedling into the upper opening of the seedling cup; the scheme can ensure that there is no poor seedling or missing seedling in the seedling cup, and there is no missing seedling phenomenon in the planting plot; the transplanting efficiency is increased, and the transplanting effect and planting income are improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the specific embodiment or prior art of the present application, the drawings needed in the specific embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0041] Figure 1 is a structure schematic view of the plug seedling detection and bad seedling removing and supplementing test device provided by the embodiment of the present application;

[0042] Figure 2 is a top view of the plug seedling detection and bad seedling removing and supplementing test device provided by the embodiment of the present application;

[0043] Figure 3 is a side view of the plug seedling detection and bad seedling removing and supplementing test device provided by the embodiment of the present application;

[0044] Figure 4 is Figure 3 is an enlarged view of A in figure 1;

[0045] Figure 5 is a structural schematic view of a pot seedling releasing mechanism provided by an embodiment of the present application;

[0046] Figure 6 is a structural schematic view of a seedling removing mechanism provided by an embodiment of the present application;

[0047] Figure 7 is a contact schematic view between the seedling removing mechanism and the pot seedling releasing mechanism provided by an embodiment of the present application;

[0048] Figure 8 is a structural schematic view of a seedling supplementing mechanism provided by an embodiment of the present application.

[0049] Figure: 100 - support frame; 200 - conveying mechanism; 210 - driving device; 220 - driving gear; 230 - driven gear; 240 - chain; 300 - seedling cup; 301 - lower opening; 302 - positioning block; 500 - seedling removing mechanism; 510 - seedling cup fixing frame; 520 - push plate support; 530 - push plate; 531 - transition plate; 540 - seedling removing cylinder; 550 - movable connecting piece; 560 - base sliding block; 570 - guide rail; 600 - seedling supplementing mechanism; 610 - seedling supplementing support; 620 - seedling supplementing cup; 630 - seedling supplementing cylinder; 640 - cylinder connecting seat; 650 - linkage rod; 660 - movable baffle; 700 - pot seedling releasing mechanism; 710 - baffle assembly; 720 - rotating shaft; 730 - linkage plate; 731 - gear tooth; 740 - torsional spring; 750 - limiting bearing; 800 - seedling unloading mechanism; 810 - seedling unloading support; 820 - guide plate; 830 - seedling cup support frame. DETAILED DESCRIPTION

[0050] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0051] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0053] As Figure 1 , Figure 2 , Figure 3 And Figure 4 As shown in the application, a plug seedling detection and plug seedling detection and replacement seedling test device of plug seedling transplanting machine is provided, which comprises a support frame 100, a conveying mechanism 200, a seedling cup 300, a seedling removal mechanism 500 and a seedling replacement mechanism 600.

[0054] Wherein, the support frame 100 comprises a crossbeam 101 and a stand column 102, a plurality of crossbeams 101 are surrounded to form a rectangular structure, and a plurality of stand columns 102 are arranged at the bottom of the crossbeam; the crossbeam 101 and the stand column 102 can adopt a profile, and the crossbeams 101 can be assembled by bolt connection, or can be assembled by plate-shaped connecting pieces combined with bolts.

[0055] The crossbeam 101 and the stand column 102 can also be assembled by bolt connection or plate-shaped connecting pieces combined with bolts.

[0056] The conveying mechanism 200 is arranged on the support frame 100, specifically on the crossbeam 101, and plays a conveying role for the seedling cup 300; a plurality of seedling cups 300 are connected with the conveying mechanism 200, and the seedling cups 300 can move along a circular track under the driving of the conveying mechanism 200; the lower opening 301 position of the seedling cup 300 is provided with a plug seedling release mechanism 700, which is used to close the lower opening 301 to carry the plug seedling or open the lower opening 301 to release the plug seedling.

[0057] The culling mechanism 500 is located on one side of the conveying mechanism 200, when the seedling cup 300 moves to the culling position, the culling mechanism 500 drives the pot seedling releasing mechanism 700 to open the lower opening 301 to release the pot seedling, it should be noted that the pot seedling to be released here refers to the poor quality seedling;

[0058] The seedling supplementing mechanism 600 is arranged downstream of the culling mechanism 500, and the seedling supplementing mechanism 600 is above the moving track of the seedling cup 300, when the seedling cup 300 from which the poor quality seedling is removed moves to the seedling supplementing position, the seedling supplementing mechanism 600 is used to supplement the pot seedling to the upper opening of the seedling cup 300.

[0059] In the embodiment, the conveying mechanism 200 includes a driving device 210, a driving gear 220, a plurality of driven gears 230 and a chain 240;

[0060] The support frame 100 can be arranged as a ring-shaped frame, the driving gear 220 and the driven gears 230 are rotatably mounted above the support frame 100 through shafts respectively, the driving gear 220 and the driven gears 230 are driven through the chain 240, forming a ring-shaped conveying track; the driving device 210 can be a servo motor, which is arranged at the bottom of the cross beam 101, used to be connected with the driving gear 220 to drive the driving gear 220 to rotate, and then drive the driven gears 230 to rotate synchronously through the chain 240;

[0061] The seedling cup 300 is fixedly mounted on the outside of the chain 240, specifically, the seedling cup 300 is fixed on the chain 240 through a connecting piece, so that the plurality of seedling cups 300 make rotary motion on the running track driven by the chain 240, realizing the conveying of the pot seedling. The connecting piece can be an L-shaped plate, one end of which is connected with the chain through a bolt or is welded, and the other end is connected with the seedling cup 300 through a bolt.

[0062] Referring to Figure 5 In the embodiment, the pot seedling releasing mechanism 700 includes two rotating assemblies arranged on the opposite side walls of the seedling cup 300, and a baffle assembly 710 connected with the rotating assemblies respectively;

[0063] The rotating assembly includes a rotating shaft 720, a shaft seat, a linkage plate 730 and a torsional spring 740;

[0064] The rotating shaft 720 is connected with the side wall of the seedling cup 300 through the shaft seat, so that the rotating shaft 720 can rotate relative to the seedling cup 300; the two ends of the rotating shaft 720 are connected with the linkage plates 730 respectively, the end of the linkage plate 730 away from the rotating shaft 720 is provided with a gear tooth 731, the linkage plates 730 in the two rotating assemblies are meshed and linked through the gear teeth 731; the baffle assembly 710 is fixedly connected with the rotating shaft 720; the end of any baffle assembly 710 is provided with a connecting rod with a limiting bearing 750;

[0065] Torsion spring 740 is sleeved on rotating shaft 720, and two spring legs of torsion spring 740 are respectively in contact with the side wall of seedling cup 300 and the side wall of baffle assembly 710, so that two baffle assemblies 710 are in a normally closed state; in use, when the limit bearing 750 is subjected to a downward pressure during movement, it drives the baffle assembly 710 to move, and at the same time, due to the meshing of the gear teeth 731, the two baffle assemblies 710 move towards opposite directions, thereby opening the lower opening 301 of the seedling cup 300, and making the poor pot seedlings fall; when the limit bearing 750 is no longer subjected to a downward pressure during movement, under the action of the torsion spring 740, the two baffle assemblies 710 reset, and the lower part of the lower opening 301 of the seedling cup 300 is closed, which serves to support the newly fallen pot seedlings.

[0066] With reference to Figure 6 and Figure 7 In this embodiment, the seedling removing mechanism 500 includes a seedling cup fixing frame 510, a push plate support 520, a push plate 530 and a seedling removing cylinder 540.

[0067] The seedling cup fixing frame 510 is arranged on the cross beam 101, and the seedling cup fixing frame 510 has a passage for passing the seedling cup 300, which is arranged as a straight passage.

[0068] The side wall of the seedling cup 300 is provided with a positioning block 302 for contacting the support frame 100, which serves to prevent the seedling cup 300 from tilting and shaking when the seedling removing operation is performed.

[0069] The push plate support 520 is arranged on the support frame 100, and the inner side of the push plate support 520 is provided with a transverse limit rod, and the upper part of the limit rod and the upper end inner wall of the push plate support 520 form an activity space for passing the push plate 530.

[0070] One end of the push plate 530 is connected with the telescopic rod of the seedling removing cylinder 540 through the movable connecting piece 550, and the push plate 530 can be driven to swing up and down by the seedling removing cylinder 540, and the other end of the push plate 530 passes through the activity space to contact the downward limit bearing 750, so that the pot seedling releasing mechanism 700 can open the lower opening 301.

[0071] In addition, the other end of the push plate 530 is provided with a transition plate 531 inclined on both sides of the moving track direction of the seedling cup 300, and the lower end surface of the transition plate 531 is used to contact the limit bearing 750.

[0072] When the seedling cup 300 moves to the seedling removing station, and the poor seedlings in the seedling cup 300 need to be removed, the seedling removing cylinder 540 drives the toggle plate 530 to be in a horizontal position, at this time, the seedling cup 300 is in the moving process, the limiting bearing 750 sequentially contacts the upstream transition plate and the lower end surface of the toggle plate 530, so that the limiting bearing 750 is subjected to a downward pressure, and the two baffle assemblies 710 are opened to release the poor seedlings, when the seedling cup 300 moves to the downstream transition plate 531, the limiting bearing 750 is no longer subjected to the pressure, and the two baffle assemblies 710 are reset under the action of the torsional spring 740.

[0073] It should be noted that the seedling cup fixing frame 510 is composed of two spaced-apart split fixing frames, and the two split fixing frames are detachably connected with the cross beam 101 by bolts, so that the spacing of the channel for passing the seedling cup is adjustable.

[0074] As a preferred embodiment, the seedling removing mechanism 500 further comprises a base sliding block 560 and a guide rail 570.

[0075] The guide rail 570 is connected with the inner side of the support frame 100, the base sliding block 560 is slidingly connected with the guide rail 570, and the seedling removing cylinder 540 is connected with the base sliding block 560. By arranging the guide rail 570 and the base sliding block 560, the installation position of the seedling removing cylinder 540 can be adjusted, and then the installation position of the toggle plate 530 can be adjusted.

[0076] Referring to Figure 8 In the embodiment, the seedling supplementing mechanism 600 comprises a seedling supplementing support 610, a seedling supplementing cup 620, a seedling supplementing cylinder 630, a cylinder connecting seat 640, a connecting rod 650 and a movable baffle 660.

[0077] The seedling supplementing cup 620 is fixed on the seedling supplementing support 610, and the seedling supplementing cylinder 630 is connected with the inside of the seedling supplementing cup 620 through the cylinder base.

[0078] The telescopic rod of the seedling supplementing cylinder 630 moves downward and upward, and the cylinder connecting seat 640 is connected with the end of the telescopic rod.

[0079] The opposite side walls at the lower opening 301 of the seedling supplementing cup 620 are respectively hinged with the movable baffles 660 through shafts, the two ends of the connecting rod 650 are respectively hinged with the cylinder connecting seat 640 and the movable baffles 660, and when the telescopic rod of the seedling supplementing cylinder 630 moves, the movable baffles 660 can be driven to open or close the lower opening 301 of the seedling supplementing cup 620, and when the movable baffles 660 are opened, the pot seedlings can fall into the vacant seedling cup 300 from which the poor seedlings have been removed.

[0080] The pot seedling detection and seedling removing and supplementing test device provided in the embodiment further comprises a seedling unloading mechanism 800 arranged downstream of the seedling supplementing mechanism 600.

[0081] The seedling unloading mechanism 800 comprises a seedling unloading support 810, a guide plate 820 and a seedling cup support 830;

[0082] The seedling unloading support 810 is L-shaped, the vertical frame of which is connected with the support 100, and the horizontal frame thereof is a flat plate facing the seedling cup 300. The two sides of the horizontal frame in the direction of the moving track of the seedling cup 300 are provided with the guide plates 820, which are used to contact and limit the bearing 750, and the bearing 750 is pressed downward by the guide plates 820 and the horizontal frame to open the movable baffle 660.

[0083] The seedling cup support 830 is arranged on the support 100, and the seedling cup support 830 has a channel for passing the seedling cup.

[0084] Specifically, the seedling cup support 830 is composed of two spaced-apart split supports, and the two split supports are respectively detachably connected with the cross beam 101 by bolts, so that the spacing of the channel for passing the seedling cup is adjustable.

[0085] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting and removing and replacing seedlings of a pot seedling transplanting machine for a plug tray, characterized in that, The device comprises a support frame, a conveying mechanism, seedling cups, a seedling removing mechanism and a seedling supplementing mechanism. The support frame comprises crossbeams and uprights, the crossbeams are arranged in a rectangular structure, and the uprights are arranged at the bottom of the crossbeams. The conveying mechanism is arranged on the crossbeams. The seedling cups are connected to the conveying mechanism and can move along a circular track under the driving of the conveying mechanism. The lower opening position of the seedling cup is provided with a pot seedling releasing mechanism for closing the opening to carry the pot seedlings or opening the lower opening to release the pot seedlings. The seedling removing mechanism is arranged on one side of the conveying mechanism and is used to drive the pot seedling releasing mechanism to open the lower opening to release the pot seedlings. The seedling supplementing mechanism is arranged downstream of the seedling removing mechanism and above the moving track of the seedling cups and is used to supplement the pot seedlings to the upper opening of the seedling cups.

2. The pot seedling detection and replanting test device for a plug transplanter according to claim 1, characterized in that, The conveying mechanism comprises a driving device, a driving gear, a plurality of driven gears and a chain. The driving gear and the driven gears are rotatably mounted above the crossbeams by shafts, the driving gear and the driven gears are connected by the chain to form a circular conveying track. The driving device is arranged on the crossbeams and is connected to the driving gear. The seedling cups are fixedly installed on the outside of the chain so that the seedling cups rotate on the running track under the driving of the chain.

3. The pot seedling detection and replanting test device for a plug tray transplanter according to claim 1, wherein The pot seedling releasing mechanism comprises two rotating assemblies arranged on the opposite side walls of the seedling cup and a baffle assembly connected to the rotating assemblies. The rotating assembly comprises a rotating shaft, a shaft seat, a linkage plate and a torsional spring. The rotating shaft is connected to the side wall of the seedling cup by the shaft seat. The two ends of the rotating shaft are respectively connected to the linkage plates, the end of the linkage plate away from the rotating shaft is provided with a gear, and the linkage plates in the two rotating assemblies are connected by the gear. The baffle assembly is fixedly connected to the rotating shaft, and the end of any baffle assembly is provided with a connecting rod with a limiting bearing. The torsional spring is sleeved on the rotating shaft, and the two spring legs of the torsional spring are respectively in contact with the side wall of the seedling cup and the side wall of the baffle assembly, so that the two baffle assemblies are in a normally closed state.

4. The pot seedling detection and replanting test device of the plug tray transplanting machine according to claim 3, characterized in that, The seedling removing mechanism comprises a seedling cup fixing frame, a push plate support, a push plate and a seedling removing cylinder. The seedling cup fixing frame is arranged on the crossbeams and has a passage for the seedling cups. The side walls of the seedling cups are respectively provided with positioning blocks for contacting the support frame. The push plate support is arranged on the support frame, the inner side of the push plate support is provided with a transverse limiting rod, and the upper end of the limiting rod and the inner wall of the push plate support form a moving space for the push plate. One end of the push plate is connected to the telescopic rod of the seedling removing cylinder by a movable connecting piece, and the other end of the push plate passes through the moving space to contact and press the limiting bearing, so that the pot seedling releasing mechanism can open the lower opening.

5. The pot seedling detection and replanting test device of the plug tray seedling transplanting machine according to claim 4, characterized in that, The other end of the push plate is provided with a transition plate inclined on both sides in the direction of the moving track of the seedling cup, and the lower end surface of the transition plate is used to contact the limiting bearing.

6. The pot seedling detection and replanting test device for a plug tray transplanting machine according to claim 4, wherein The seedling removing mechanism further comprises a base sliding block and a guide rail. The guide rail is connected with the inner side of the cross beam, the base slider is slidingly connected with the guide rail, and the seedling removing cylinder is connected with the base slider.

7. The pot seedling detection and replanting test device for a plug transplanter according to claim 1, wherein The seedling supplementing mechanism comprises a seedling supplementing support, a seedling supplementing cup, a seedling supplementing cylinder, a cylinder connecting seat, a linkage rod and a movable baffle. The seedling supplementing cup is fixed on the seedling supplementing support, and the seedling supplementing cylinder is connected with the inside of the seedling supplementing cup through a cylinder base. The telescopic rod of the seedling supplementing cylinder moves downward and upward, and the cylinder connecting seat is connected with the end of the telescopic rod. The opposite side walls of the lower opening of the seedling supplementing cup are respectively hinged with the movable baffles through shafts, the two ends of the linkage rod are respectively hinged with the cylinder connecting seat and the movable baffles, and the telescopic rod of the seedling supplementing cylinder moves to drive the movable baffles to open or close the lower opening of the seedling supplementing cup.

8. The pot seedling detection and replanting test device for a plug tray transplanting machine according to claim 7, characterized in that, The seedling unloading mechanism is arranged downstream of the seedling supplementing mechanism. The seedling unloading mechanism comprises a seedling unloading support, a guide plate and a seedling cup support frame. The seedling unloading support is L-shaped, the vertical frame of which is connected with the cross beam, and the horizontal frame in the form of a flat plate faces the seedling cup, the two sides of the horizontal frame in the direction of the moving track of the seedling cup are obliquely provided with the guide plates for contacting the limiting bearings, and the guide plates and the horizontal frame apply downward pressure on the limiting bearings to drive the movable baffles to open; the seedling cup support frame is arranged on the cross beam, and the seedling cup support frame has a channel for passing the seedling cup.

9. The pot seedling detection and replanting test device for a plug transplanter according to claim 4, wherein The seedling cup fixing frame is detachably connected with the cross beam through bolts, so that the spacing of the channel for passing the seedling cup is adjustable.

10. The pot seedling detection and replanting test device for a plug tray transplanting machine according to claim 8, characterized in that, The seedling cup support frame is detachably connected with the cross beam through bolts, so that the spacing of the channel for passing the seedling cup is adjustable.

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