Self-cleaning vegetable selection table

Abstract

The present invention discloses a self-cleaning vegetable selection table, which belongs to the technical field of vegetable screening, and includes a workbench and a conveyor belt. A detection table is arranged on the workbench, an electric push rod and a work station are arranged on the workbench, and a transmission roller is arranged inside the workbench, and the transmission roller is connected to the conveyor belt. The present invention can make the conveyor belt intermittently driven through the cooperation of the inflation mechanism and the air path mechanism. During the transmission process, the detection mechanism can automatically press and detect and automatically remove the surface of each group of fruits and vegetables passing through. During the detection process, through the design of the air jet tube and the detection tube, the distance of the detection movement stroke from contact to stopping the pressure is the spacing distance between the first and second nozzle holes, which can ensure that the detection force applied each time during the detection is consistent, and the accuracy of the detection and selection screening can be ensured while avoiding damage to the fruits and vegetables, and effectively improving the efficiency of the screening and selection of fruits and vegetables.

Description

Technical Field

[0001] The present invention relates to the technical field of vegetable screening, and in particular to a self-cleaning vegetable selection table. Background Art

[0002] Before storing or transporting vegetables, they generally need to be selected and tested, screened and classified based on their size, quality, maturity, color, etc., and defective products removed. They are then packaged for storage and transportation.

[0003] However, the current screening of fruits and vegetables based on appearance conditions such as size and color is relatively simple. However, for soft fruits and vegetables such as tomatoes, when they are too mature, it is difficult to distinguish them by visual inspection alone, and manual grasping and pressing are required for testing. Mature tomatoes have a certain elasticity and will rebound slightly after being pressed. They have a certain hardness overall. If they are too soft and rotten after being pressed, they are generally over-ripe or stale bad fruits. However, traditional testing that relies solely on manual testing not only has low screening and selection efficiency, but also makes it difficult to ensure consistent testing intensity, which can easily lead to excessive pressing pressure during testing, causing damage to the surface of fruits and vegetables. Not only is the screening efficiency low, but it can also easily lead to economic losses.

[0004] How to invent a self-cleaning vegetable picking table to improve these problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0005] In order to make up for the above deficiencies, the present invention provides a self-cleaning vegetable selection table, which aims to improve the problems raised by the above background technology.

[0006] The present invention is achieved in that:

[0007] The present invention provides a self-cleaning vegetable picking table, comprising a workbench and a conveyor belt, a detection table is arranged on the workbench, an electric push rod and a work station are arranged on the workbench, a transmission roller is arranged inside the workbench, the transmission roller is connected to the conveyor belt by transmission, a motor connected to the transmission roller by transmission is arranged on the side wall of the detection table, an inflation mechanism is arranged inside the detection table, the inflation mechanism comprises a gear 1 arranged on the side wall of the transmission roller, a group of gears 2 meshing with the gear 1 are arranged inside the detection table, a transmission plate is arranged on the output shaft of the gear 2, a sealing chamber 1, a sealing chamber 2 and a sealing chamber 3 are symmetrically arranged inside the detection table, a piston 1 is arranged inside the sealing chamber 1, and an air-filling mechanism is arranged inside the sealing chamber 1. A connecting rod is arranged between the bottom of plug one and the transmission plate, a piston two is sleeved inside the sealing chamber two, a spring and a limiting sleeve are arranged between the piston two and the inside of the sealing chamber two, the top of the sealing chamber one is connected with the bottom of the sealing chamber two, a one-way valve is arranged at the connecting point, an air intake valve is arranged at the top of the sealing chamber one, an air path mechanism is arranged at the connection between the sealing chamber two and the sealing chamber three, the air path mechanism includes a sliding block slidably connected to the connection between the sealing chamber two and the sealing chamber three, an exhaust hole is opened at the top of the sealing chamber three, an air intake hole connected with the sealing chamber three is opened on the side wall of the sealing chamber two, and a screening mechanism for limiting the force detection of vegetable hardness is arranged on the inner side of the sealing chamber three.

[0008] Preferably, the number of teeth of gear two is smaller than that of gear one, and the length of the transmission plate is larger than the diameter of gear two.

[0009] Preferably, the side wall of the slider is provided with two groups of protrusions extending into the interior of the second sealing cavity, the interior of the slider is provided with an air inlet pipe matching the air inlet hole, the side wall of the slider is provided with a blocking block matching the exhaust hole, and the interior of the blocking block is provided with an exhaust pipe.

[0010] Preferably, a limit groove matching the slider is provided inside the second sealing cavity, magnets are provided at the top and bottom of the limit groove, the slider is made of a magnetic material, and a switch 1 is provided at the top of the limit groove.

[0011] Preferably, the screening mechanism includes a detection head movably connected to the sealing chamber three, an air circuit pipe is opened inside the detection head, the part of the detection head extending to the inner side of the sealing chamber three is designed as a piston rod, a spring is arranged between the detection head and the sealing chamber three, an arc-shaped surface is designed at the end of the detection head away from the sealing chamber three, a plurality of slide grooves are arranged on the arc-shaped surface, a detection rod is movably connected inside the slide groove, a spring is arranged between the detection rod and the slide groove, an injection pipe connected to the air circuit pipe is symmetrically designed on the arc-shaped surface of the detection head along the detection rod, a detection tube is movably connected on the outer side of the injection pipe, and a connecting component for driving the electric push rod to start and stop is arranged inside the detection head.

[0012] Preferably, the connecting component includes conductive contacts symmetrically arranged on the inner side walls of each group of slide grooves, the side walls of the detection rod are provided with conductive rings matching the conductive contacts, the interior of the detection head is provided with wires and a control center, the conductive contacts arranged on the side walls of adjacent slide grooves are connected by wires, and the two groups of conductive contacts that are farthest apart are connected in series by wires and the control center.

[0013] Preferably, the side wall of the jet tube is provided with a first spray hole, the side wall of the detection tube is provided with a second spray hole matching the first spray hole, a spring is provided between the detection tube and the detection head, and a second switch matching the detection tube is provided inside the detection head.

[0014] Preferably, one end of the air circuit tube is communicated with the inner cavity of the sealing cavity three, and the other end of the air circuit tube is communicated with the interior of the jet tube, and the interior of the jet tube is hollow.

[0015] In summary, the beneficial effects of the present invention are:

[0016] 1. Through the cooperation of the inflation mechanism and the air path mechanism, the conveyor belt can be intermittently transmitted. During the transmission process, the detection mechanism can automatically press and detect the surface of each group of passing fruits and vegetables and automatically remove them. During the detection process, through the design of the air jet tube and the detection tube, it can be ensured that the detection movement stroke is consistent during each detection, and the pressure will not continue to be applied when the detection stroke is exceeded, so that the detection force applied each time during the detection can also be consistent, which ensures the accuracy of detection and selection and screening while avoiding damage to fruits and vegetables, effectively improving the efficiency of vegetable and fruit screening and selection.

[0017] 2. During the detection process, when the maximum detection stroke is reached, the first and second nozzles overlap to release excess gas, which can not only prevent the detection head from continuing to move and cause squeezing damage to the surface of fruits and vegetables, but also release excess gas through the second nozzle. During the detection, the surface of fruits and vegetables and the conveyor belt are automatically cleaned by air blowing, which can effectively remove dust and impurities on the surface of fruits and vegetables while reducing contact with fruits and vegetables, avoiding damage caused by contact with fruits and vegetables during cleaning, and ensuring the integrity and freshness of fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is an overall schematic diagram of the present invention.

[0020] Figure 2It is a schematic diagram of the interior of the detection platform of the present invention.

[0021] Figure 3 It is a schematic diagram of the interior of sealed chamber 1 and sealed chamber 2 of the present invention.

[0022] Figure 4 It is a schematic diagram of the connection between the sealing chamber 2 and the sealing chamber 3 of the present invention.

[0023] Figure 5 It is a schematic diagram of a slider of the present invention.

[0024] Figure 6 It is a schematic diagram of the interior of the detection head of the present invention.

[0025] Figure 7 It is a schematic diagram of the interior of the detection tube of the present invention.

[0026] Legend:

[0027] 100, workbench; 101, work station; 102, electric push rod; 103, conveyor belt; 104, motor; 105, transmission roller; 106, gear 1; 107, gear 2; 200, test bench; 300, sealing chamber 1; 301, sealing chamber 2; 302, sealing chamber 3; 303, piston 1; 304, connecting rod; 305, test head; 306, piston 2; 307, slider; 308, exhaust hole; 309, switch one; 310, air inlet; 311, air inlet pipe; 312, exhaust pipe; 313, bump; 314, blocking block; 315, jet pipe; 316, detection tube; 317, detection rod; 318, conductive ring; 319, conductive contact piece; 320, slide groove; 321, wire; 322, control center; 323, switch two; 324, air pipe; 325, spray hole one; 326, spray hole two. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0029] Reference Figure 1-7The present invention provides a self-cleaning vegetable selection table, including a workbench 100 and a conveyor belt 103. A detection table 200 is arranged on the workbench 100. An electric push rod 102 and a work station 101 are arranged on the workbench 100. A transmission roller 105 is arranged inside the workbench 100. The transmission roller 105 is transmission-connected to the conveyor belt 103. A motor 104 transmission-connected to the transmission roller 105 is arranged on the side wall of the detection table 200. An inflation mechanism is arranged inside the detection table 200. The inflation mechanism includes a gear 106 arranged on the side wall of the transmission roller 105. A group of gears 2 107 meshing with the gear 1 106 is arranged inside the detection table 200. The output shaft of the gear 2 107 is provided with a transmission plate. A sealed chamber 1 300, a sealed chamber 2 301 and a sealed chamber 3 302 are symmetrically arranged inside the detection table 200. The inside of the sealed chamber 1 300 A piston 1 303 is provided, a connecting rod 304 is provided between the bottom of the piston 1 303 and the transmission plate, a piston 2 306 is sleeved inside the sealed chamber 2 301, a spring and a limiting sleeve are provided between the piston 2 306 and the inside of the sealed chamber 2 301, the top of the sealed chamber 1 300 is connected with the bottom of the sealed chamber 2 301, a one-way valve is provided at the connection, an air intake valve is provided at the top of the sealed chamber 1 300, an air path mechanism is provided at the connection between the sealed chamber 2 301 and the sealed chamber 3 302, the air path mechanism includes a slider 307 slidably connected to the connection between the sealed chamber 2 301 and the sealed chamber 3 302, an exhaust hole 308 is provided at the top of the sealed chamber 302, an air intake hole 310 connected to the sealed chamber 3 302 is provided on the side wall of the sealed chamber 2 301, and a screening mechanism for limiting the force detection of vegetable hardness is provided on the inner side of the sealed chamber 302.

[0030] Furthermore, the number of teeth of gear two 107 is smaller than the number of teeth of gear one 106 , and the length of the transmission plate is greater than the diameter of gear two 107 .

[0031] It should be noted that the rotation stroke and speed of the driving roller 105 can be amplified by the gear 2 107, thereby accelerating the piston movement of the driving piston 1 303 inside the sealing chamber 1 300 to inflate the inside of the sealing chamber 2 301, so that it satisfies the two sets of adjacent partitions on the surface of the conveyor belt 103 as one cycle. After each cycle, sufficient amount of gas can be filled in to make the piston 2 306 rise to push the bump 313.

[0032] Furthermore, the side wall of the slider 307 is provided with two groups of protrusions 313 extending into the interior of the sealing chamber 2 301, the interior of the slider 307 is provided with an air inlet pipe 311 matching the air inlet hole 310, the side wall of the slider 307 is provided with a blocking block 314 matching the exhaust hole 308, and the interior of the blocking block 314 is provided with an exhaust pipe 312.

[0033] Reference Figure 4-5A limiting groove matching the slider 307 is provided inside the sealed cavity 301, magnets are provided at the top and bottom of the limiting groove, the slider 307 is made of a magnetic material, and a switch 309 is provided at the top of the limiting groove.

[0034] Reference Figure 2-7 The screening mechanism includes a detection head 305 movably connected to the sealing chamber three 302, an air circuit pipe 324 is provided inside the detection head 305, the portion of the detection head 305 extending to the inner side of the sealing chamber three 302 is designed as a piston rod, a spring is provided between the detection head 305 and the sealing chamber three 302, an arcuate surface is designed at one end of the detection head 305 away from the sealing chamber three 302, a plurality of groups of slide grooves 320 are provided on the arcuate surface, a detection rod 317 is movably connected inside the slide groove 320, a spring is provided between the detection rod 317 and the slide groove 320, an injection pipe 315 connected to the air circuit pipe 324 is symmetrically designed along the detection rod 317 on the arcuate surface of the detection head 305, a detection tube 316 is movably connected to the outer side of the injection pipe 315, and a connecting component for driving the electric push rod 102 to start and stop is provided inside the detection head 305.

[0035] Furthermore, the connecting component includes conductive contacts 319 symmetrically arranged on the inner wall of each group of slide grooves 320, the side wall of the detection rod 317 is provided with a conductive ring 318 that cooperates with the conductive contact 319, the interior of the detection head 305 is provided with a wire 321 and a control center 322, the conductive contacts 319 arranged on the side walls of adjacent slide grooves 320 are connected by the wire 321, and the two groups of conductive contacts 319 that are farthest apart are connected in series by the wire 321 and the control center 322.

[0036] Furthermore, a spray hole 325 is provided on the side wall of the jet tube 315, a spray hole 326 matching the spray hole 325 is provided on the side wall of the detection tube 316, a spring is provided between the detection tube 316 and the detection head 305, and a switch 323 matching the detection tube 316 is provided inside the detection head 305.

[0037] It should be noted that one end of the gas line tube 324 is connected to the inner cavity of the sealing cavity 302, and the other end of the gas line tube 324 is connected to the interior of the injection tube 315, and the interior of the injection tube 315 is hollow.

[0038] The working process of this self-cleaning vegetable picking table is as follows:

[0039] The motor 104 starts to drive the transmission roller 105 to rotate, driving the conveyor belt 103 to move and transport the fruits and vegetables on the surface of the conveyor belt 103. It should be noted that a partition is provided on the surface of the conveyor belt 103, which can isolate and transport the fruits and vegetables on the surface at a fixed distance. The rotation of the transmission roller 105 drives the gear 106 to rotate, and then drives the gear 2 107 to accelerate the rotation, thereby driving the piston 1 303 to perform piston movement inside the sealed chamber 1 300. When the piston 1 303 moves downward, the air pressure inside the sealed chamber 1 300 decreases and the gas is sucked in through the intake valve. When the piston 1 303 moves upward, the internal gas is pumped into the sealed chamber 2 301 through the one-way valve, and the sealed chamber 2 301 is continuously inflated in a cycle, pushing the piston 2 306 to move upward until the piston 2 306 contacts the protrusion 313. Further upward movement can push the protrusion 313 to move upward, thereby pushing the slider 307 to move upward and disengage from the limit. The connection between the slider 307 and the magnet at the bottom of the limit groove is realized, and the slider 307 moves up to be attracted by the magnet at the top of the limit groove, and at the same time pushes the trigger switch 1 309. The switch 1 309 controls the motor 104 to stop rotating, so that the conveyor belt 103 stops moving. At the same time, the fruits and vegetables transported on the surface of the conveyor belt 103 stay between the two groups of detection heads 305. Further, after the slider 307 moves up, the air inlet pipe 311 and the air inlet hole 310 overlap, and the compressed gas inside the sealed chamber 2 301 enters the sealed chamber 3 302 through the air inlet pipe 311, and is pressurized and continuously transported to the sealed chamber 3 302 under the action of the spring force connected to the piston 2 306. At the same time, the blocking block 314 rises to block the exhaust hole 308. At this time, the side opening of the exhaust pipe 312 fits with the side wall of the exhaust hole 308, which can prevent the internal gas of the sealed chamber 302 from leaking through the exhaust hole 308.

[0040] The increase in air pressure inside the sealed chamber 302 can push the detection head 305 to move toward the fruit and vegetable. During this process, the detection tube 316 on the side wall of the detection head 305 first contacts the surface of the round fruit and vegetable and then resists. When the detection head 305 continues to move toward the fruit and vegetable, the detection tube 316 slides along the outer wall of the air jet tube 315 until the end of the detection rod 317 contacts the surface of the fruit and vegetable. As the detection head 305 moves further, the pressure between the detection rod 317 and the surface of the fruit and vegetable gradually increases. At this time, the overripe fruit and vegetable or bad fruit is too soft and rotten, and the surface pressure will produce a large degree of The detection rod 317 is sunken to a certain extent, so that the detection rod 317 sinks into it, so that the compression degree of the spring connected to the detection rod 317 is low, and the displacement amount of the detection rod 317 in the slide groove 320 is small, so that the conductive ring 318 will not contact the conductive contact piece 319. The fruits and vegetables that are suitable for transportation and storage are not soft and rotten, and have a certain hardness on the surface. When they are in contact with the detection rod 317 and are pressed, the degree of depression is small, so that when the detection head 305 moves, the detection rod 317 retracts to a greater extent into the slide groove 320 under the action of pressure, and the conductive ring 318 will contact the conductive contact piece 319.

[0041] During the detection process, as the detection head 305 continues to move, the detection tube 316 slides along the outer wall of the jet tube 315 until the second jet hole 326 coincides with the first jet hole 325. At this time, the detection tube 316 just contacts the second switch 323, triggering the second switch 323. At this time, the internal power supply of the control center 322 is started, and the current passes through the wire 321, the conductive contact piece 319 and the conductive ring 318 to form a set of circuits. If the control center 322 receives the loop electrical signal, it means that the control center 322, the wire 321, the conductive contact piece 319 and the conductive ring 318 form a complete loop. If the control center 322 receives no loop signal, the retraction amount of the detection rod 317 satisfies the contact between the conductive ring 318 and the conductive contact sheet 319, and the surface hardness of the group of fruits and vegetables detected meets the conditions for suitable transportation and storage. If the control center 322 receives no loop signal, it means that the circuit is broken, indicating that the detection compression amount of at least one detection rod 317 in the detection area does not meet the detection conditions, indicating that the detected fruits and vegetables have soft and rotten areas and are not suitable for subsequent transportation and storage. At this time, the control center 322 controls the electric push rod 102 to delay starting, and pushes the group of fruits and vegetables away from the conveyor belt 103 when they pass by, thereby realizing automatic selection and screening of fruits and vegetables.

[0042] It should be noted that the flow cross-sectional area of ​​the detection tube 316 is the same as the flow cross-sectional area of ​​the air inlet pipe 311. During the detection process, when the spray hole 1 325 and the spray hole 2 326 overlap, the gas entering the sealed chamber 302 through the air inlet pipe 311 can enter the gas line tube 324, the spray hole 1 325 and finally be sprayed out through the spray hole 2 326, thereby relieving the pressure inside the sealed chamber 302. This can not only prevent the detection head 305 from continuing to move and causing squeezing damage to the surface of fruits and vegetables, but also allow excess gas to be discharged through the spray hole 2 326, thereby automatically blowing and cleaning the surface of fruits and vegetables and the surface of the conveyor belt 103 during detection.

[0043] It should be noted that, through the above-mentioned design, during the detection, starting from the contact between the detection tube 316 and the detection object, the detection rod 317 can further fully contact the detection object and apply pressure until it continues to move until the nozzle 1 325 and the nozzle 2 326 overlap. The stroke of each detection can be from the contact between the detection tube 316 and the detection object until the detection is terminated. The detection stroke can be controlled to be the spacing distance between the nozzle 1 325 and the nozzle 2 326 in the initial state, thereby ensuring that the displacement stroke of each detection remains consistent and the detection pressure remains consistent.

[0044] When the second piston 306 moves down under the pressure of the spring until it contacts the convex block 313 located below the side wall of the slider 307, the convex block 313 can be pushed downward, so that the slider 307 is disconnected from the magnet at the top of the limit groove and moves down to be attracted by the magnet at the bottom of the limit groove. In this process, the switch 1 309 that is disengaged from the pressing controls the motor 104 to start, and the device starts the cycle to resume the inflation of the inside of the second sealed chamber 301 to detect the next fruit and vegetable. At the same time, the slider 307 moves downward to dislocate the air inlet hole 310 and the air inlet pipe 311, and the second sealed chamber 301 is disconnected from the third sealed chamber 302. The plugging block 314 moves downward to make the two ends of the exhaust pipe 312 open, with one end connected to the outside and the other end connected to the inside of the sealed chamber 302. During the reset process of the detection head 305 through the spring connected to the detection head 305, excess gas can be discharged through the exhaust pipe 312, so that the air pressure inside the sealed chamber 302 returns to the initial state. At the same time, the detection tube 316 is reset under the reset action of the spring connected to the detection tube 316, so that the distance between the spray hole 1 325 and the spray hole 2 326 is reset. By resetting the initial conditions, the stable cycle of the detection work is guaranteed.

[0045] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-cleaning vegetable selection table, comprising a workbench (100) and a conveyor belt (103), wherein a detection table (200) is arranged on the workbench (100), characterized in that: The workbench (100) is provided with an electric push rod (102) and a work station (101); a transmission roller (105) is provided inside the workbench (100); the transmission roller (105) is transmission-connected to a conveyor belt (103); a motor (104) transmission-connected to the transmission roller (105) is provided on a side wall of the inspection table (200); an inflation mechanism is provided inside the inspection table (200); the inflation mechanism comprises a gear 1 (106) provided on the side wall of the transmission roller (105); a group of gear 2 (107) meshing with gear 1 (106) is provided inside the inspection table (200); a transmission plate is provided on an output shaft of gear 2 (107); a sealed chamber 1 (300), a sealed chamber 2 (301) and a sealed chamber 3 (302) are symmetrically provided inside the inspection table (200); a piston 1 (303) is provided inside the sealed chamber 1 (300); a bottom of the piston 1 (303) is provided A connecting rod (304) is arranged between the sealing chamber (300) and the transmission plate, a piston (306) is sleeved inside the sealing chamber (301), a spring and a limit sleeve are arranged between the piston (306) and the inside of the sealing chamber (301), the top of the sealing chamber (300) and the bottom of the sealing chamber (301) are connected, a one-way valve is arranged at the connection point, an intake valve is arranged at the top of the sealing chamber (300), and the sealing chambers (301) and (302) are connected to each other. ) is provided at the connection of the sealed chamber 2 (301) and the sealed chamber 3 (302), the sealed chamber 3 (302) is provided with an air path mechanism, the air path mechanism comprises a slider (307) slidably connected to the connection of the sealed chamber 2 (301) and the sealed chamber 3 (302), the top of the sealed chamber 3 (302) is provided with an exhaust hole (308), the side wall of the sealed chamber 2 (301) is provided with an air inlet hole (310) connected to the sealed chamber 3 (302), and the inner side of the sealed chamber 3 (302) is provided with a screening mechanism for limiting the strength of vegetable hardness detection; The screening mechanism comprises a detection head (305) movably connected to the sealing chamber three (302), an air path pipe (324) is provided inside the detection head (305), the portion of the detection head (305) extending to the inside of the sealing chamber three (302) is designed as a piston rod, a spring is provided between the detection head (305) and the sealing chamber three (302), and an arc surface is designed at one end of the detection head (305) away from the sealing chamber three (302), and the arc surface is provided with a plurality of groups of slide grooves (320 ), a detection rod (317) is movably sleeved inside the slide groove (320), a spring is arranged between the detection rod (317) and the slide groove (320), an air injection pipe (315) connected to the air pipe (324) is symmetrically designed along the detection rod (317) on the arc surface of the detection head (305), and the detection tube (316) is movably sleeved on the outer side of the air injection pipe (315), and a connecting component for driving the electric push rod (102) to start and stop is arranged inside the detection head (305); The connecting component comprises conductive contacts (319) symmetrically arranged on the inner side wall of each group of slide grooves (320); the side wall of the detection rod (317) is provided with a conductive ring (318) matched with the conductive contacts (319); the interior of the detection head (305) is provided with a wire (321) and a control center (322); the conductive contacts (319) arranged on the side walls of adjacent slide grooves (320) are connected by the wire (321); and the two groups of conductive contacts (319) that are farthest apart are connected in series by the wire (321) and the control center (322).

2. A self-cleaning vegetable selection table according to claim 1, characterized in that: The number of teeth of the gear 2 (107) is less than the number of teeth of the gear 1 (106), and the length of the transmission plate is greater than the diameter of the gear 2 (107).

3. A self-cleaning vegetable selection table according to claim 1, characterized in that: The side wall of the slider (307) is provided with two groups of protrusions (313) extending into the interior of the second sealing cavity (301); an air inlet pipe (311) matching with the air inlet hole (310) is provided inside the slider (307); a blocking block (314) matching with the air exhaust hole (308) is provided on the side wall of the slider (307); an air exhaust pipe (312) is provided inside the blocking block (314).

4. A self-cleaning vegetable selection table according to claim 3, characterized in that: A limit groove matching the slider (307) is provided inside the second sealed cavity (301), magnets are provided at the top and bottom of the limit groove, the slider (307) is made of a magnetic material, and a switch 1 (309) is provided at the top of the limit groove.

5. A self-cleaning vegetable selection table according to claim 1, characterized in that: The side wall of the jet tube (315) is provided with a first jet hole (325), the side wall of the detection tube (316) is provided with a second jet hole (326) that matches the first jet hole (325), a spring is provided between the detection tube (316) and the detection head (305), and a second switch (323) that matches the detection tube (316) is provided inside the detection head (305).

6. A self-cleaning vegetable selection table according to claim 1, characterized in that: One end of the air circuit tube (324) is in communication with the inner cavity of the sealed cavity three (302), and the other end of the air circuit tube (324) is in communication with the interior of the jet tube (315), and the interior of the jet tube (315) is of hollow design.

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