CN111467538A - Seedling tray disinfection device and disinfection method thereof - Google Patents

Abstract

The invention discloses a sterilizing device for a seedling tray and a sterilizing method thereof. The sterilizing device comprises: a rack; a sterilizing box body is arranged on the rack; a channel, which is penetrated in the disinfection channel, and both ends extend out of the openings at both ends of the disinfection channel; a plurality of first water gun nozzles are arranged in the upper part of the disinfection channel and face the upper part of the carrying transmission channel surface; a plurality of second water gun nozzles are arranged in the lower part of the sterilization channel and face the lower surface of the carrying conveyor; wherein, as the carrying conveyor carries the seedling trays through the sterilizing channel, several The first water gun nozzle and the second water gun nozzle spray the disinfectant liquid on the front and back sides of the seedling tray respectively, and the upper and lower surfaces of the nurse tray can be simultaneously sprayed and disinfected when the nurse tray passes through the disinfection channel. In order to be thorough, and can greatly improve the disinfection efficiency.

Description

A kind of seedling tray disinfection device and disinfection method

technical field

The invention relates to a seedling tray disinfection device and a disinfection method, belonging to the technical field of seedling tray disinfection.

Background technique

In the process of flue-cured tobacco seedling raising, both old and new float trays need to be thoroughly disinfected to ensure that the seedling trays do not enter the seedling shed with viruses, and prevent tobacco seedlings from being infected and causing diseases. The existing disinfection methods include manual disinfection and machine disinfection. Among them, manual disinfection is the manual operation of the breeding team to clean the nursery trays using brushes and disinfectants. This method is extremely inefficient, and only a few nursery trays are cleaned per person per hour. Ten, and it is easy to retain the substrate or roots at the bottom of the seedling tray, which easily affects the subsequent normal seedling raising. Machine disinfection is conveyed by conveyor, and then rinsed and disinfected from above with a water gun nozzle. However, this method can only disinfect one side of the seedling tray at a time. If secondary disinfection is required, it is necessary to turn over the seedling tray and disinfect the other side. , the work efficiency is still low. In addition, the existing machine disinfection cannot completely and comprehensively disinfect the seedling tray, which will also affect the effect of seedling. For example, the applicant has repeatedly found that the seedlings are not neat.

SUMMARY OF THE INVENTION

Based on the above, the present invention provides a seedling tray disinfection device and a disinfection method thereof, which can thoroughly sterilize the front and back sides of the seedling tray at one time, and can greatly improve the disinfection efficiency to overcome the deficiencies of the prior art.

The technical scheme of the present invention is: a seedling tray disinfection device, comprising:

frame;

A sterilization box is arranged on the rack, and the sterilization box has a sterilization channel with openings at both ends;

a carrying transmission channel, which is penetrated in the sterilization channel, and both ends extend out of the openings at both ends of the sterilization channel;

a plurality of first water gun spray heads, arranged in the upper part of the sterilization channel and facing the upper surface of the bearing conveying channel;

A plurality of second water gun nozzles are arranged in the lower part of the sterilization channel and face the lower surface of the bearing conveying channel;

Wherein, as the carrying conveying channel carries the seedling tray through the disinfection channel, the first and second water gun nozzles spray the disinfection liquid on the front and back sides of the seedling tray respectively.

In one example, the carrier conveyor is inclined along its width direction, the spray of the first water gun nozzle is perpendicular to the upper surface of the carrier conveyor, and the injection of the second water gun nozzle is perpendicular to the carrier The lower surface of the conveyor.

In one example, the carrying conveyor is a power roller conveyor, and the spraying direction of the second water gun nozzles is toward the gap between adjacent power rollers, so that the sterilization sprayed by the second water gun nozzles The liquid is sprayed onto the lower surface of the seedling tray after passing through the gap.

In one example, a row of auxiliary rollers are spaced along the length of the lower end side of the powered roller conveyor to block and limit the movement of the seedling trays within the powered roller conveyor.

In one example, the device for sterilizing seedling trays further includes:

a disinfection water tank, arranged on the rack, for containing the disinfectant;

A water pump is arranged in the sterilizing water tank to pump the sterilizing liquid in the sterilizing water tank to the first water gun spray head and the second water gun spray head.

In one example, the bottom of the disinfection channel is formed with a large upper and a lower small liquid collection channel, and the lower end of the liquid collection channel is communicated with the disinfection water tank.

In one example, a movably plugged filter screen is arranged in the liquid collection channel to filter the liquid entering the disinfection water tank.

In one example, the device for sterilizing seedling trays further includes:

The disinfection water tank has a first inlet and a second inlet;

a disinfectant tank, arranged on the frame, the disinfectant tank is connected to the first inlet through a first pipeline, the disinfectant tank can introduce the disinfectant into the disinfectant tank, and the disinfectant tank is A pipeline is provided with a first valve;

A supplementary water tank is arranged on the frame, the supplementary water tank is connected with the second inlet through a second pipeline, the supplementary water tank can introduce water into the disinfection water tank, and the second pipeline is provided with a supplementary water tank. There is a second valve.

In one example, the device for sterilizing seedling trays further includes:

a liquid level detection sensor, arranged in the disinfection water tank, for detecting the liquid level of the disinfectant;

a concentration detection sensor, arranged in the disinfection water tank, for detecting the concentration of the disinfectant;

a controller, the liquid level detection sensor and the concentration detection sensor are respectively electrically connected to the controller, and the controller is electrically connected to the control ends of the first valve and the second valve, and the controller is controlled by the controller A controller controls the actions of the first valve and the second valve.

The present invention also provides a method for sterilizing the seedling tray sterilizing device, comprising the following steps:

S1, place the seedling tray on the carrying conveyor, and make the seedling hole on the seedling tray toward the carrying conveyor;

S2, the seedling tray is carried forward by the carrying conveyor, and when passing through the disinfection channel, the disinfection liquid is sprayed on the front and back of the seedling tray by several of the first water gun nozzles and the second water gun nozzles. on both sides to complete the disinfection.

The beneficial effects of the present invention are as follows: when sterilizing, first place the seedling tray to be sterilized on the bearing conveyor, and then the carrying conveyor moves forward with the seedling tray continuously, and along with the carrying conveyor, the seedling tray is sterilized Channel, a plurality of first water gun nozzles and second water gun nozzles spray the disinfection liquid on the front and back sides of the seedling tray respectively, and the tray is transported to the outside after disinfection. Since the water gun nozzles are installed on the upper and lower sides of the carrying conveyor, the upper and lower surfaces of the seedling tray can be sprayed and disinfected at the same time when the seedling tray passes through the disinfection channel, which not only makes the disinfection more thorough, but also greatly improves the disinfection. efficiency.

In addition, in the present invention, the carrying conveyor is inclined along its width direction, the spray of the first water gun nozzle is perpendicular to the upper surface of the carrying conveyor, and the spray of the second water gun nozzle is perpendicular to the lower surface of the carrying conveyor. It is in a tilted state, and the water gun nozzles on the upper and lower sides are perpendicular to its surface. Therefore, when the nursery tray is disinfected, a large amount of disinfectant will flow down the inclination direction of the nursery tray, so that it will not hinder the impact of the water gun nozzles on the lower side. spray, which can improve the disinfection effect.

At the same time, the auxiliary roller arranged on the lower end side of the power roller conveyor can block and limit the movement of the seedling tray in the power roller conveyor, so that the seedling tray during the movement is always located at the bottom of the power roller conveyor. The inside, and then the second water gun nozzle can completely and thoroughly sterilize the bottom surface of the seedling tray.

Description of drawings

Fig. 1 is the front view of the sterilizing device for seedling trays according to the embodiment of the present invention;

Fig. 2 is the side view of the sterilizing device of the seedling tray of the embodiment of the present invention;

Fig. 3 is an enlarged view of the structure in the disinfection channel in Fig. 2;

Fig. 4 is the structural representation of the disinfection water tank;

Description of reference numbers:

10 racks, 11 walking wheels;

20 disinfection boxes, 21 liquid collection channels, 22 filters;

30 carrying conveyor, 31 power rollers, 32 frame bodies, 33 auxiliary rollers;

40 first water gun nozzle, 41 upper support;

50 second water gun nozzle, 51 lower support;

60 disinfection water tank, 61 discharge port, 62 liquid inlet, 63 transparent observation window, 64 first inlet, 65 second inlet, 66 water pump;

70 disinfectant tank, 71 first pipeline, 72 first valve, 73 concentration detection sensor;

80 supplementary water tank, 81 second pipeline, 82 second valve, 83 liquid level detection sensor.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation disclosed below.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIGS. 1 to 4 , an apparatus for sterilizing a seedling tray according to an embodiment of the present invention includes a rack 10, a sterilizing box 20, a carrying transmission channel 30, a first water gun nozzle 40, a second water gun nozzle 50, a disinfection water tank 60, Disinfectant tank 70 , supplementary water tank 80 , liquid level detection sensor 83 and concentration detection sensor 73 .

The rack 10 mainly plays a supporting role, and is used to support parts such as the disinfection box 20 , the carrying conveyor 30 , the first water gun nozzle 40 and the second water gun nozzle 50 . The bottom of the rack 10 is provided with traveling wheels 11 , through which the rack 10 can be moved, so that it is convenient to sterilize at different positions.

The disinfection box 20 provides a disinfection place for the seedling tray. The sterilization box 20 has a sterilization channel with openings at both ends, and is installed horizontally on the rack 10 so that the two ends of the sterilization channel are laid flat, with one end opening as an inlet and the other end opening as an outlet.

The carrying conveyor 30 is used for conveying the seedling trays. The carrying conveying channel 30 is passed through the sterilization channel, and both ends extend out of the openings at both ends of the sterilization channel, wherein the end extending out of the inlet is reserved for an entry station, and the end extending out of the outlet is reserved for a collection station.

Several first water gun spray heads 40 are mainly used for spraying disinfectant. Specifically, several first water gun nozzles 40 are installed in the upper part of the sterilization channel and face the upper surface of the carrying conveyor 30 , for example, several first water gun nozzles 40 can be fixed in the disinfection channel through the upper support 41 . Several first water gun spray heads 40 can be arranged in multiple rows, and the length of each row matches the width of the carrying conveyor 30, so that the upper surface of the seedling tray can be thoroughly sterilized.

Several second water gun spray heads 50 are mainly used for spraying disinfectant. Specifically, several second water gun nozzles 50 are installed in the lower part of the sterilization channel and face the lower surface of the carrying conveying channel 30 , for example, several second water gun nozzles 50 can be fixed in the disinfection channel through lower supports 51 . Several second water gun nozzles 50 can be arranged in multiple rows, and the length of each row matches the width of the carrying conveyor 30, so that the lower surface of the seedling tray can be thoroughly sterilized.

During sterilization, first place the seedling tray to be sterilized on the entry station of the carrying conveyor 30, then the carrying conveyor 30 moves forward with the seedling tray, and the carrying conveyor 30 carries the seedling tray through the disinfection channel, Several first water gun nozzles 40 and second water gun nozzles 50 spray the disinfection liquid on the front and back sides of the seedling tray respectively. After disinfection, the nurse tray is transported to the collection station, and the nurse tray can be removed from the collection station. Since the water gun nozzles are installed on the upper and lower sides of the carrying conveyor 30, the upper and lower surfaces of the seedling tray can be sprayed and sterilized at the same time when the seedling tray passes through the disinfection channel, which not only makes the disinfection more thorough, but also greatly improves the Disinfection efficiency.

The applicant has found in practice that if the carrying conveyor 30 adopts a flat structure, the disinfectant sprayed by the first water gun nozzle 40 will fall from the bottom of the carrying conveyor 30 after being sterilized, which will hinder the spraying of the second water gun nozzle 50, and further Affect the disinfection effect, so that the bottom of the seedling tray is not completely disinfected. In the present application, the carrier conveyor 30 is inclined along its width direction. The advantage of this structure is that since the seedling tray is in an inclined state when it is moved and disinfected, and the water gun nozzles on the upper and lower sides are perpendicular to its surface, a large amount of disinfectant will follow the inclination direction of the seedling tray when the seedling tray is sterilized. Flow down, so as not to hinder the spray that affects the lower side of the water gun nozzle, which can improve the disinfection effect.

In an example, the carrying conveyor 30 is a power roller 31 conveyor. The power roller 31 conveyor is composed of several power rollers 31 and a frame body 32. The power roller 31 conveyor is installed obliquely through brackets with different heights on both sides. , the spraying direction of the second water gun nozzle 50 is towards the gap between the adjacent power rollers 31, so that the disinfectant liquid sprayed by the second water gun nozzle 50 passes through the gap and is sprayed on the lower surface of the seedling tray, thereby completing the seedling tray Disinfection of the underside.

In one example, a row of auxiliary rollers 33 are spaced along the length of the conveyor at the lower end of the power roller 31 conveyor. These auxiliary rollers 33 can rotate to block and limit the movement of the seedling tray to the power rollers. 31 conveyor, so that the seedling tray in the moving process is always located inside the conveyor of the power roller 31, and the second water gun nozzle 50 can completely and thoroughly sterilize the bottom surface of the seedling tray.

The sterilizing water tank 60 is used for containing the sterilizing liquid. The sterilizing water tank 60 is installed on the rack 10 to provide the sterilizing liquid required for spraying by the first water gun spray head 40 and the second water gun spray head 50 . A water pump 66 is installed in the sterilizing water tank 60, the inlet end of the water pump 66 is immersed in the sterilizing liquid in the sterilizing water tank 60, and the outlet end of the water pump 66 is communicated with the first water gun nozzle 40 and the second water gun nozzle 50 through pipes, so as to The sterilizing liquid in the sterilizing water tank 60 is pumped to the first water gun nozzle 40 and the second water gun nozzle 50 .

In one example, the sterilizing water tank 60 is installed below the sterilizing box body 20, the bottom of the sterilizing channel is formed with a large upper and lower small liquid collecting channel 21, and the lower end of the liquid collecting channel 21 is communicated with the sterilizing water tank 60, so that the first The sterilizing liquid sprayed by the water gun nozzle 40 and the second water gun nozzle 50 is returned to the disinfection water tank 60, so as to be reused.

In one example, a movably plugged filter screen 22 is provided in the liquid collection channel 21 to filter the liquid entering the disinfection water tank 60 . Specifically, a socket may be provided on one side of the liquid collection channel 21 , and the filter screen 22 may be inserted into the socket, so as to filter the liquid returning to the disinfection water tank 60 . When there are too many filter residues, the filter screen 22 can be taken out for cleaning. The filtration aperture of the filter screen 22 can be determined as required.

In one example, the bottom of the disinfection water tank 60 is provided with a discharge port 61, and a manual valve is provided at the discharge port 61. After the disinfection is completed, or when the disinfection liquid no longer meets the standard, the liquid can be discharged through the discharge port 61. A liquid inlet 62 is provided on the upper part of the sterilizing water tank 60, and a manual valve is arranged at the liquid inlet 62. Before disinfection, the sterilizing liquid can be transported into the sterilizing water tank 60 through the liquid inlet 62, for example, through a pipe or a funnel. Disinfection liquid introduction.

In one example, the disinfection water tank 60 has a first inlet 64 and a second inlet 65 , and the two liquid inlets 62 are both provided at the upper portion of the disinfection water tank 60 .

The supplementary water tank 80 is mainly used to supplement the water in the disinfection water tank 60 . Specifically, the supplementary water tank 80 is installed on the rack 10, for example, above the sterilization box 20, and the supplementary water tank 80 is used to hold water. The supplementary water tank 80 is connected to the second inlet 65 through the second pipeline 81, and the supplementary water tank 80 can introduce water into the disinfection water tank 60, thereby increasing the disinfectant. A second valve 82 is installed on the second pipe 81, and the second valve 82 may be a solenoid valve for water.

The disinfection liquid tank 70 is mainly used to adjust the concentration of the disinfection liquid in the disinfection water tank 60 . Specifically, the disinfectant tank 70 is installed on the rack 10 , for example, above the disinfection box body 20 , and the disinfectant tank 70 is used for holding high-concentration disinfectant liquid. The disinfectant tank 70 is connected to the first inlet 64 through the first pipeline 71. The disinfectant tank 70 can introduce the disinfectant into the disinfectant tank 60 to increase the concentration of the disinfectant in the disinfectant tank 60, thereby meeting the required concentration for disinfection. A first valve 72 is installed on the first pipe 71, and the first valve 72 may be a solenoid valve for water.

The liquid level detection sensor 83 is used to detect the liquid level of the disinfectant. Specifically, the liquid level detection sensor 83 is installed in the disinfection water tank 60 .

The concentration detection sensor 73 is used to detect the concentration of the disinfectant. Specifically, the concentration detection sensor 73 is installed in the disinfection water tank 60 .

In the controller, the signal output ports of the liquid level detection sensor 83 and the concentration detection sensor 73 are respectively electrically connected to the signal input ports of the controller, and the controller is electrically connected to the control terminals of the first valve 72 and the second valve 82, and is controlled by the controller. The controller controls the actions of the first valve 72 and the second valve 82 .

During the disinfection process, the disinfectant will splash out of the disinfection water tank 60, or adhere to the seedling tray, thereby causing the disinfectant to gradually decrease and the concentration to gradually decrease. For this reason, the normal liquid level range value and the normal concentration range value of the disinfectant in the disinfection water tank 60 are preset, and when the liquid level detection sensor 83 detects that the actual liquid level in the disinfection water tank 60 is lower than the set normal liquid level range value , the controller controls the second valve 82 to open, and the water in the supplementary water tank 80 enters the disinfection water tank 60. When the liquid level reaches the normal liquid level range value, the controller controls the second valve 82 to close to stop the water supply. At this time, the concentration detection The sensor 73 detects the concentration value of the disinfectant. When the concentration detection sensor 73 detects that the actual concentration in the disinfectant tank 60 is lower than the set normal concentration range value, the controller controls the first valve 72 to open, and the high level in the disinfectant tank 70. Concentration water enters the disinfection water tank 60, and when the liquid level reaches the normal concentration range value, the controller controls the first valve 72 to close to stop the liquid replenishment. Because the disinfectant in the disinfection water tank 60 is pumped by the water pump 66 to the first water gun nozzle 40 and the second water gun nozzle 50 in real time to rinse the seedling tray, the disinfectant in the disinfection water tank 60 is swaying, and the high concentration of disinfectant and disinfection The liquid in the water tank 60 can be uniformly mixed without special stirring and mixing.

In one example, the amount of water to be added can be obtained according to the liquid level value detected by the liquid level detection sensor 83 after adding water and the liquid level value before adding water, and then according to the normal concentration range value, the high-concentration water that needs to be added can be converted. amount of disinfectant.

In one example, a transparent observation window 63 is provided on one side of the sterilizing water tank 60, so that the sterilizing liquid in the sterilizing water tank 60 can be observed from the outside.

In one example, a scale dimension is provided at the transparent viewing window 63 for measuring the volume or depth of the liquid in the sterilizing water tank 60, so that the operator can decide whether to add sterilizing liquid.

The present invention also provides a method for sterilizing using the seedling tray sterilizing device, comprising the following steps:

S1. Place the seedling tray on the carrying conveyor 30, and make the seedling holes on the seedling tray face the carrying conveyor 30.

S2, the seedling tray is carried forward by the carrying conveyor 30, and when passing through the disinfection channel, the disinfection liquid is sprayed on the front and back sides of the seedling tray by several first water gun nozzles 40 and second water gun nozzles 50 respectively, and then complete disinfect.

In the present invention, the seedling holes on the seedling tray face downward, so that the disinfectant will not gather in the seedling holes during disinfection, which reduces the problem that the disinfectant falls in a line and then hinders the spraying of the second water gun nozzle 50; two Then make the disinfectant flow back as much as possible and improve the reuse rate.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a educate seedling tray degassing unit which characterized in that includes:

a frame (10);

the disinfection box body (20) is arranged on the rack (10), and the disinfection box body (20) is provided with a disinfection channel with two open ends;

the bearing conveying channel (30) is arranged in the disinfection channel in a penetrating mode, and two ends of the bearing conveying channel extend out of openings at two ends of the disinfection channel;

a plurality of first water gun nozzles (40) arranged at the upper part in the disinfection channel and facing to the upper surface of the bearing conveying channel (30);

a plurality of second water gun nozzles (50) arranged at the lower part in the disinfection channel and facing to the lower surface of the bearing conveying channel (30);

the first water gun nozzles (40) and the second water gun nozzles (50) spray disinfection liquid on the front surface and the back surface of the seedling raising plate respectively along with the seedling raising plate passing through the disinfection channel under the driving of the bearing conveying channel (30).

2. A nursery tray sterilizing device according to claim 1, wherein the carrying conveyor (30) is inclined in a width direction thereof, and the first water gun spray heads (40) spray perpendicularly to an upper surface of the carrying conveyor (30), and the second water gun spray heads (50) spray perpendicularly to a lower surface of the carrying conveyor (30).

3. The nursery tray sterilizing apparatus according to claim 2, wherein the carrying conveyor (30) is a power roller (31) conveyor, and the spraying direction of the second water gun spray heads (50) is toward the gap between the adjacent power rollers (31), so that the sterilizing liquid sprayed from the second water gun spray heads (50) is sprayed onto the lower surface of the nursery tray after passing through the gap.

4. A sterilization apparatus for nursery trays according to claim 2, wherein a row of auxiliary rollers (33) is provided at the lower end side of the power roller (31) conveyor at intervals along the length direction thereof to block and restrict the movement of the nursery trays within the power roller (31) conveyor.

5. A sterilization apparatus for nursery trays according to claim 1, further comprising:

the disinfection water tank (60) is arranged on the rack (10) and is used for containing disinfection liquid;

a water pump (66) disposed in the sterilizing water tank (60) to pump the sterilizing liquid in the sterilizing water tank (60) to the first and second water gun nozzles (40, 50).

6. A sterilization apparatus for nursery trays according to claim 5, wherein a liquid collecting channel (21) having a large top and a small bottom is formed at the bottom of the sterilization channel, and the lower end of the liquid collecting channel (21) is communicated with the sterilization water tank (60).

7. A nursery site disinfection device as claimed in claim 6, characterized in that a filter screen (22) is movably inserted in said liquid collection channel (21) to filter the liquid entering said disinfection tank (60).

8. A sterilization apparatus for nursery trays according to claim 5, further comprising:

the sterilizing water tank (60) having a first inlet (64) and a second inlet (65);

the disinfectant tank (70) is arranged on the rack (10), the disinfectant tank (70) is connected with the first inlet (64) through a first pipeline (71), disinfectant can be introduced into the disinfectant tank (60) through the disinfectant tank (70), and a first valve (72) is arranged on the first pipeline (71);

and the supplementary water tank (80) is arranged on the rack (10), the supplementary water tank (80) is connected with the second inlet (65) through a second pipeline (81), the supplementary water tank (80) can guide water into the sterilizing water tank (60), and a second valve (82) is arranged on the second pipeline (81).

9. A sterilization apparatus for nursery trays according to claim 8, further comprising:

a liquid level detection sensor (83) arranged in the disinfection water tank (60) and used for detecting the liquid level of the disinfection liquid;

a concentration detection sensor (73) disposed in the sterilizing water tank (60) for detecting a concentration of the sterilizing liquid;

and the liquid level detection sensor (83) and the concentration detection sensor (73) are respectively electrically connected with the controller, the controller is electrically connected with the control ends of the first valve (72) and the second valve (82), and the controller controls the actions of the first valve (72) and the second valve (82).

10. A method for sterilizing a nursery site using the sterilizing apparatus for a nursery site according to any one of claims 1 to 9, comprising the steps of:

s1, placing the seedling raising tray on the bearing conveying channel (30) and enabling the seedling raising holes on the seedling raising tray to face the bearing conveying channel (30);

s2, the seedling tray is driven by the bearing conveying channel (30) to move forwards, and when the seedling tray passes through the disinfection channel, disinfection liquid is respectively sprayed on the front surface and the back surface of the seedling tray by the first water gun spray heads (40) and the second water gun spray heads (50), so that disinfection is completed.

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