A spraying device for cultivating watermelon seedlings in a greenhouse

Abstract

The present invention relates to the field of greenhouse planting technology, specifically a spray device for cultivating watermelon seedlings in a greenhouse, comprising a box body, a conveying structure, a cultivation box, a driving assembly and a spray structure. The conveying structure comprises two groups of conveying chains respectively installed on both sides of the box body, and multiple groups of cultivation boxes are linearly arranged in sequence along the conveying direction of the conveying chain. The cultivation boxes are rotatably connected to the mounting columns on the conveying chain. The driving assembly comprises two groups of rotating power parts and a driving shaft. The spray structure comprises a water supply box, a water supply pipe and multiple groups of spray branch pipes. The present invention drives two groups of driving shafts to rotate through two groups of rotating power parts, drives the two groups of conveying chains to intermittently convey the multiple groups of cultivation boxes, and drives the water supply pipe to rotate back and forth to drive the multiple groups of spray branch pipes to intermittently insert into the corresponding cultivation boxes, thereby accurately conveying the spray water to the cultivation box, avoiding the problem that water accumulates on the leaves of the watermelon seedlings and evaporates to affect the spraying effect during the current conventional spraying operation.

Description

Technical Field

[0001] The invention relates to the technical field of greenhouse planting, in particular to a spraying device for cultivating watermelon seedlings in a greenhouse. Background Art

[0002] Watermelon is a summer fruit with sweet flesh that can cool down and relieve heat, making it very popular among consumers. Watermelon is grown by growing and cultivating watermelon seedlings. During the greenhouse cultivation process, watermelon seedlings need to be sprayed with water and medicine regularly to ensure their healthy growth.

[0003] Watermelon seedlings have a high demand for water. In order to ensure that the soil is slightly moist during the cultivation and production of watermelon seedlings, planting personnel need to spray the watermelon seedlings regularly. In the actual operation process, existing planting personnel mainly use two parts, manual spraying and machine spraying. Among them, machine spraying is less dependent on manual labor compared with manual handheld sprinkler spraying, which greatly improves the efficiency of spraying.

[0004] In actual operation, both manual spraying and machine spraying spray water to the upper part of the watermelon seedling planting area, and the water falls to the planting area under the influence of gravity. Although the above method can complete the spraying operation, some water will drip and accumulate on the leaves of the watermelon seedlings. This water often evaporates without being absorbed by the leaves in the greenhouse environment, thereby reducing the quality of the spraying. Summary of the Invention

[0005] The purpose of the present invention is to provide a spraying device for cultivating watermelon seedlings in a greenhouse, so as to solve the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides a spraying device for cultivating watermelon seedlings in a greenhouse, comprising:

[0007] Box;

[0008] The conveying structure includes two sets of conveying chains, which are respectively installed on both sides of the box body. The two ends of each conveying chain are respectively meshed and connected to the two ends of the box body and are rotatably installed on the driving gear and the auxiliary gear.

[0009] There are multiple groups of incubation boxes, which are linearly arranged in sequence along the conveying direction of the conveyor chain, and two groups of side plates of the incubation boxes close to the two groups of conveyor chains are rotatably connected to the mounting posts on the conveyor chains respectively;

[0010] The drive assembly includes two sets of rotating power members and a drive shaft. The two sets of rotating power members are respectively installed on both sides of the box. The power shafts are coaxially mounted with corresponding drive shafts. The two sets of drive shafts are connected to the rotary shafts of the corresponding driving gears through an intermittent transmission assembly.

[0011] The spray structure includes a water supply box, a water supply pipe, and multiple groups of spray branch pipes. The water supply box is fixedly mounted on one end of the box body. Both ends of the water supply pipe are rotatably connected to the side panels on both sides of the box body. The water inlet of the water supply box is connected to the water supply box through a delivery pipe. The side wall of the water supply pipe is linearly provided with multiple groups of drainage ports along its axial direction. One end of the multiple groups of spray branch pipes is fixedly connected to the corresponding drainage ports. The end of the water supply pipe is connected to the drive shaft on the corresponding side through a reciprocating transmission assembly.

[0012] The two sets of rotating power parts drive the two sets of driving shafts to rotate, which drive the two sets of conveying chains to intermittently convey multiple sets of cultivation boxes, and drive the water supply pipes to rotate back and forth to drive multiple sets of spray branches to intermittently insert into the corresponding cultivation boxes.

[0013] As a further solution of the present invention, the conveying chain includes multiple groups of chain link units that rotate in sequence, the mounting column is fixedly installed in the middle of the chain link unit corresponding to the connected cultivation box, and the side panel of the cultivation box is provided with a limiting ring for rotating the connecting mounting column.

[0014] As a further solution of the present invention, the rotary shaft of the driving gear is connected to the driven shaft of the auxiliary gear on the same side through a transmission belt.

[0015] As a further solution of the present invention, the intermittent transmission assembly includes a driving pulley and a driven sheave;

[0016] The driven sheave is coaxially fixedly mounted on the end of the rotating shaft of the driving gear, and the driven sheave is provided with a plurality of guide grooves spaced apart along its radial direction;

[0017] The active dial is coaxially mounted on the end side of the driving shaft, a lever is fixedly mounted on the end face of the active dial along its radial direction, a limiting column is mounted on one end of the lever away from the center of the active dial, and the limiting column is used for sliding engagement along the guide groove.

[0018] As a further solution of the present invention, the reciprocating transmission assembly includes a first transmission shaft, a second transmission shaft and a transmission gear;

[0019] The first transmission shaft and the second transmission shaft are rotatably mounted on the side panels of the cultivation box, and the ends of the first transmission shaft and the second transmission shaft are connected by driven gears, wherein the first transmission shaft and the driving shaft are connected by a continuous transmission assembly, and the driving shaft drives the first transmission shaft to rotate synchronously, and a group of incomplete gears are coaxially mounted on the shaft bodies of the first transmission shaft and the second transmission shaft, and the transmission gears are coaxially fixedly mounted on the ends of the water supply pipes, and the two sides thereof are connected to the two groups of incomplete gears respectively, and the tooth surface ends of the two groups of incomplete gears are alternately meshed with the transmission gears for transmission.

[0020] As a further solution of the present invention, the continuous transmission assembly includes a transmission main gear and a transmission sub gear;

[0021] The transmission main gear and the transmission sub-gear are coaxially mounted on the drive shaft and the first transmission shaft respectively and are meshedly connected. The gear diameter of the transmission main gear is larger than the gear diameter of the transmission sub-gear.

[0022] As a further solution of the present invention, the spray branch pipe is arc-shaped, and a spray nozzle is fixedly installed on the drainage port of the spray branch pipe.

[0023] As a further solution of the present invention, a water pump is installed in the water supply box, the water pump is connected to one end of the delivery pipe, and a detachable water collection box is provided at the bottom of the water supply pipe.

[0024] Compared with the prior art, the present invention provides a conveying structure on the box body, connects the culture box with two sets of conveying chains in the conveying structure, and installs a spray structure at one end of the box body. When the present invention is in use;

[0025] 1. When it is necessary to spray the watermelon seedlings in multiple groups of cultivation boxes, the driving component is turned on and the intermittent transmission component drives the two groups of conveyor chains to intermittently drive the multiple groups of cultivation boxes installed thereon to move. The multiple groups of cultivation boxes are moved to the spraying station at one end of the box in turn, and the driving component drives the water supply pipe to rotate back and forth during the spraying process. When the cultivation box intermittently moves to the spraying station and stops, the multiple groups of spray branch pipes are inserted into the cultivation box for spraying under the rotation of the water supply pipe. When the cultivation box is driven to leave the spraying station, the water supply pipe rotates and resets to drive the multiple groups of spray branch pipes to rotate in the opposite direction, thereby making way for the next group of cultivation boxes moved to the spraying station. Since the spray branch pipes are directly inserted into the cultivation box, the sprayed water can be directly sent to the soil in the cultivation box for storage, which greatly improves the water spraying utilization efficiency.

[0026] 2. The spray assembly is installed at one end of the box body, and its range of movement is small, limited to the rotation of the water supply pipe and the spray branch pipe, so that the water body has a shorter stroke when it is transported from the water supply tank to the end of the spray branch pipe, which reduces the difficulty of water transportation, ensures the stability of water pressure, and ensures the spraying quality of each group of spray branches. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic structural diagram of a spraying device for cultivating watermelon seedlings in a greenhouse.

[0028] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of point A in the middle.

[0029] Figure 3This is a side schematic diagram of a spray device for cultivating watermelon seedlings in a greenhouse according to the present invention.

[0030] Figure 4 It is a structural schematic diagram of the conveying structure in the present invention.

[0031] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of point B in the middle.

[0032] Figure 6 It is a structural schematic diagram of the spray structure in the present invention.

[0033] In the accompanying drawings: 1. Box body; 2. Conveying structure; 201. Conveying chain; 202. Driving gear; 2021. Rotating shaft; 203. Auxiliary gear; 204. Transmission belt; 205. Mounting column; 3. Cultivation box; 4. Spraying structure; 401. Water supply box; 402. Water accumulation box; 403. Water supply pipe; 404. Water pump; 405. Spray branch pipe; 406. Spray nozzle; 5. Intermittent transmission assembly; 501. Driven sheave; 502. Driving dial; 503. Driving rod; 504. Limiting column; 6. Reciprocating transmission assembly; 601. First transmission shaft; 602. Second transmission shaft; 603. Driven gear; 604. Incomplete gear; 605. Transmission gear; 7. Continuous transmission assembly; 701. Transmission main gear; 702. Transmission sub-gear; 8. Driving assembly; 801. Rotating power part; 802. Drive shaft. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0035] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 as well as Figure 6As shown, in an embodiment of the present invention, a spraying device for cultivating watermelon seedlings in a greenhouse includes a box body 1; a conveying structure 2, including two groups of conveying chains 201, the two groups of conveying chains 201 are respectively installed on both sides of the box body 1, and the two ends of each group of conveying chains 201 are respectively meshed and connected to the two ends of the box body 1 and rotatably installed on the driving gear 202 and the auxiliary gear 203; a cultivation box 3, which is in multiple groups, and the multiple groups of cultivation boxes 3 are linearly arranged in sequence along the conveying direction of the conveying chain 201, and the two groups of side plates of the cultivation box 3 close to the two groups of conveying chains 201 are respectively rotatably connected to the mounting posts 205 on the conveying chain 201; a driving assembly 8, including two groups of rotating power parts 801 and a driving shaft 802, and the two groups of rotating power parts 801 are respectively installed on the two ends of the box body 1 On the other side, its power shaft is coaxially mounted with a corresponding drive shaft 802, and the two groups of drive shafts 802 are transmission-connected by an intermittent transmission assembly 5 and the rotary shaft 2021 of the corresponding driving gear 202; the spray structure 4 comprises a water supply box 401, a water supply pipe 403 and a plurality of spray branch pipes 405, the water supply box 401 is fixedly mounted at one end of the box body 1, and both ends of the water supply pipe 403 are rotationally connected to the side plates on both sides of the box body 1, the water inlet of the water supply box 401 is connected to the water supply box 401 through a delivery pipe, and the side wall of the water supply pipe 403 is linearly provided with a plurality of drain outlets along its axial direction, and one end of the plurality of spray branch pipes 405 is fixedly connected to the corresponding drain outlet, and the end of the water supply pipe 403 is transmission-connected to the drive shaft 802 on the corresponding side through a reciprocating transmission assembly 6;

[0036] The two sets of rotating power members 801 drive the two sets of drive shafts 802 to rotate, and the transmission belts 204 drive the two sets of conveying chains 201 to intermittently convey multiple sets of culture boxes 3, and drive the water supply pipes 403 to rotate back and forth, driving the multiple sets of spray branch pipes 405 to intermittently insert into the corresponding culture boxes 3;

[0037] Specifically, in the present invention, when it is necessary to spray the watermelon seedlings in the multiple groups of cultivation boxes 3, the driving assembly 8 is turned on to drive the driving shaft 802 to rotate, and the intermittent transmission assembly 5 drives the driving gear 202 and the auxiliary gear 203 connected in the transmission to rotate intermittently, thereby driving the two groups of conveying chains 201 to intermittently drive the multiple groups of cultivation boxes 3 installed thereon to move. The multiple groups of cultivation boxes 3 are moved to one end of the box body 1 in turn and cooperate with the spraying structure 4 to perform the spraying operation, and the water supply pipe 403 in the spraying assembly is connected to the driving shaft 802 through the reciprocating transmission assembly 6. The water supply pipe 403 rotates back and forth during the spraying process, driving the multiple groups of spray branch pipes 405 installed thereon to swing back and forth periodically, and adapting to the delivery rhythm of the multiple groups of culture boxes 3. When the culture box 3 intermittently moves to the spraying station and stops, the multiple groups of spray branch pipes 405 are inserted into the culture box 3 for spraying operation under the rotation of the water supply pipe 403. When the culture box 3 is driven to leave the spraying station, the water supply pipe 403 rotates and resets to drive the multiple groups of spray branch pipes 405 to rotate in the opposite direction, and then make way for the next group of culture boxes 3 moved to the spraying station, thereby realizing continuous spraying operation.

[0038] like Figure 4 and Figure 5 As shown, in an embodiment of the present invention, the conveying chain 201 includes a plurality of groups of chain link units that rotate in sequence, the mounting column 205 is fixedly installed in the middle of the chain link unit corresponding to the connected incubation box 3, and the side panel of the incubation box 3 is provided with a limiting ring for rotating the connected mounting column 205. During the transportation process, the incubation box 3 is kept in a vertical state by gravity, so that after the incubation box 3 is driven by the conveying chain 201 to move to the spraying station on one side of the box body 1, its open end is ensured to face upward, so that the spray branch pipe 405 can be inserted into the incubation box 3 during rotation and alignment.

[0039] like Figure 4 As shown, in an embodiment of the present invention, the rotary shaft 2021 of the driving gear 202 is connected to the driven shaft of the auxiliary gear 203 on the same side through a transmission belt 204. In the present invention, the two sets of conveying chains 201 located on both sides of the box body 1 are respectively driven to rotate by the driving components 8 on the corresponding sides. The rotating power parts 801 in the two sets of driving components 8 use synchronous motors of the same specifications. The two sets of synchronous motors are controlled by a set of controllers. When the incubation box 3 needs to be transported, the controller synchronously starts the two sets of synchronous motors to perform the driving operation.

[0040] like Figure 2 as well as Figure 3As shown, in the embodiment of the present invention, the intermittent transmission assembly 5 includes an active dial wheel 502 and a driven sheave wheel 501, wherein the driven sheave wheel 501 is coaxially fixedly mounted on the end of the rotary shaft 2021 of the active gear 202, and the driven sheave wheel 501 is provided with a plurality of guide grooves spaced apart along its radial direction, the active dial wheel 502 is coaxially mounted on the end side of the drive shaft 802, and the end face of the active dial wheel 502 is fixedly mounted with a lever 503 along its radial direction, and a limiting column 504 is mounted on one end of the lever 503 away from the center of the active dial wheel 502, and the limiting column 504 is used to slide along the guide groove. When the present invention realizes the rotary intermittent drive operation, the synchronous motor is turned on to drive the drive shaft 802 and the active dial wheel at its end. When the driving dial 502 rotates, the limiting post 504 at the end of the driving lever 503 slides along the limiting groove on the driven groove wheel 501. At this time, the driving lever 503 drives the driven groove wheel 501 to rotate, thereby transmitting and mobilizing the driving gear 202 to rotate and the conveying chain 201 to be transported. When the limiting post 504 at the end of the driving lever 503 slides out of the limiting groove on the driven groove wheel 501, the driving lever 503 is disengaged from the driven groove wheel 501. At this time, the outer arm of the driven groove wheel 501 slides and clamps the outer wall of the driving dial 502. The driven groove wheel 501 stops rotating due to the limiting positioning of the driving dial 502. At this time, the driving gear 202 and the conveying chain 201 remain in a stopped state together with the driven groove wheel 501.

[0041] And further, the reciprocating transmission assembly 6 includes a first transmission shaft 601, a second transmission shaft 602 and a transmission gear 605, the first transmission shaft 601 and the second transmission shaft 602 are rotatably mounted on the side plate of the incubation box 3, the ends of the first transmission shaft 601 and the second transmission shaft 602 are connected by a driven gear 603, wherein the first transmission shaft 601 and the drive shaft 802 are connected by a continuous transmission assembly 7, and the drive shaft 802 drives the first transmission shaft 601 to rotate synchronously, and a set of non-rotating gears are coaxially mounted on the shaft bodies of the first transmission shaft 601 and the second transmission shaft 602. The complete gear 604 and the transmission gear 605 are coaxially fixedly mounted on the end of the water supply pipe 403, and are respectively connected to two sets of incomplete gears 604 on both sides. The tooth surface ends of the two sets of incomplete gears 604 alternately mesh with the transmission gear 605 for transmission. In the present invention, the drive shaft 802 is connected to the first transmission shaft 601 through the continuous transmission assembly 7, and drives the second transmission shaft 602 to rotate in different directions at the same speed through the driven gear 603. During the rotation of the first transmission shaft 601 and the second transmission shaft 602, the two sets of incomplete gears 604 at their ends alternately mesh with the two sides of the transmission gear 605.

[0042] Specifically, when the tooth surface of a group of incomplete gears 604 on the first transmission shaft 601 is meshed with the transmission gear 605, the tooth surface of the incomplete gear 604 on the second transmission shaft 602 on the other side is disengaged from the transmission gear 605, and the first transmission shaft 601 can rotate the transmission belt 204 to drive the water supply pipe 403 to rotate, thereby driving the multiple groups of spray branch pipes 405 to flip and insert into the corresponding culture box 3 to perform a spraying operation on the culture box 3. 4 is disengaged from the transmission gear 605, the second transmission shaft 602 on the other side replaces the first transmission shaft 601 to be connected to the water supply pipe 403, and the tooth surface of the incomplete gear 604 on the second transmission shaft 602 is meshed with the transmission gear 605. The second transmission shaft 602 can rotate the transmission belt 204 to drive the water supply pipe 403 to reverse and reset, driving the multiple groups of spray branch pipes 405 to flip away from the corresponding cultivation box 3, making way for the next group of cultivation boxes 3 to move to the spraying station.

[0043] like Figure 2 As shown, in an embodiment of the present invention, the continuous transmission component 7 includes a main transmission gear 701 and a sub-transmission gear 702, and the main transmission gear 701 and the sub-transmission gear 702 are coaxially mounted on the drive shaft 802 and the first transmission shaft 601, respectively, and are meshed and connected. The gear diameter of the main transmission gear 701 is larger than the gear diameter of the sub-transmission gear 702. The present invention sets the main transmission gear 701 and the sub-transmission gear 702 to transmit and connect the drive shaft 802 and the first transmission shaft 601, and limits the gear diameters of the main transmission gear 701 and the sub-transmission gear 702, so that when the drive shaft 802 drives the intermittent transmission component 5 transmission belt 204 to move multiple groups of culture boxes 3 to the spraying station in sequence, the spray branch pipe 405 can complete the insertion and flipping of the spray branch pipe 405 in the intermittent movement cycle of the culture box 3.

[0044] like Figure 6 As shown, in an embodiment of the present invention, the spray branch pipe 405 is arc-shaped, and a spray nozzle 406 is fixedly installed on the drainage port of the spray branch pipe 405. In the present invention, the arc-shaped spray branch pipe 405 is provided, so that the end of the spray branch pipe 405 can maintain a vertical state with the bottom plate of the inner cavity of the cultivation box 3 under the rotation of the water supply pipe 403, ensuring that the spray nozzle 406 can cover most of the position of the cultivation box 3 during the spraying process, ensuring the uniformity of soil water absorption during the spraying process, and at the same time, the arc-shaped spray branch pipe 405 makes it easy for it to make way for the cultivation box 3 moved to the spraying station during the rotation process.

[0045] like Figure 6As shown, in an embodiment of the present invention, a water pump 404 is installed in the water supply tank 401, and the water pump 404 is connected to one end of the delivery pipe. A detachable water collection box 402 is provided at the bottom of the water supply pipe 403. The water collection box 402 can be disassembled and replaced according to actual spraying requirements, thereby ensuring the flexibility of the spraying operation.

[0046] In summary, the present invention sets a conveying structure 2 on the box body 1, connects the cultivation box 3 with the two groups of conveying chains 201 in the conveying structure 2, and installs a spraying structure 4 at one end of the box body 1. When the present invention is in use, when it is necessary to spray the watermelon seedlings in multiple groups of cultivation boxes 3, the drive component 8 is turned on and the intermittent transmission component 5 transmission belt 204 drives the two groups of conveying chains 201 to intermittently drive and move the multiple groups of cultivation boxes 3 installed thereon, and the multiple groups of cultivation boxes 3 are moved to the spraying station at one end of the box body 1 in turn. At the same time, the drive component 8 drives the water supply pipe 403 to spray. During the process, the cultivation box 3 intermittently moves to the spraying station and stops. At this time, the multiple groups of spray branch pipes 405 are inserted into the cultivation box 3 for spraying operation under the rotation of the water supply pipe 403. When the cultivation box 3 is driven to leave the spraying station, the water supply pipe 403 rotates and resets to drive the multiple groups of spray branch pipes 405 to rotate in the opposite direction, thereby making way for the next group of cultivation boxes 3 moving to the spraying station. Since the spray branch pipes 405 are directly inserted into the cultivation box 3, the sprayed water can be directly sent to the soil of the cultivation box 3 for storage, which greatly improves the water spraying efficiency.

[0047] At the same time, the spray assembly is installed at one end of the box body 1, and its range of movement is small, limited to the rotation of the water supply pipe 403 and the spray branch pipe 405, so that the water body has a shorter stroke when it is transported from the water supply box 401 to the end of the spray branch pipe 405, which reduces the difficulty of water transportation, ensures the stability of water pressure, and ensures the spraying quality of each group of spray branches 405.

[0048] This solution also provides a controller which is mounted on the device. When in use, each electrical device can be started and operated separately through the controller. The power connection method for each electrical device is an existing mature technology, and the control circuit of the controller can be implemented by simple programming by technicians in this field. These are all well-known technologies in this field and will not be elaborated on here.

[0049] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A spraying device for cultivating watermelon seedlings in a greenhouse, characterized in that: include: Box (1); The conveying structure (2) comprises two groups of conveying chains (201), which are respectively installed on both sides of the box (1), and the two ends of each group of conveying chains (201) are respectively meshed and connected to the two ends of the box (1) and are rotatably installed on the driving gear (202) and the auxiliary gear (203); There are multiple groups of cultivation boxes (3), and the multiple groups of cultivation boxes (3) are linearly arranged in sequence along the conveying direction of the conveying chain (201). The two groups of side plates of the cultivation boxes (3) close to the two groups of conveying chains (201) are respectively rotatably connected to the mounting posts (205) on the conveying chain (201); The driving assembly (8) comprises two groups of rotating power members (801) and a driving shaft (802), wherein the two groups of rotating power members (801) are respectively mounted on both sides of the housing (1), and the corresponding driving shafts (802) are coaxially mounted on the power shafts thereof, and the two groups of driving shafts (802) are connected to the rotating shafts (2021) of the corresponding driving gears (202) via the intermittent transmission assembly (5); A spray structure (4) comprises a water supply box (401), a water supply pipe (403) and a plurality of spray branch pipes (405), wherein the water supply box (401) is fixedly mounted on one end of the box body (1), and both ends of the water supply pipe (403) are rotatably connected to the side panels on both sides of the box body (1); the water inlet of the water supply box (401) is connected to the water supply box (401) via a delivery pipe, and the side wall of the water supply pipe (403) is linearly provided with a plurality of drainage ports along its axial direction, and one end of the plurality of spray branch pipes (405) is fixedly connected to the corresponding drainage ports, and the end of the water supply pipe (403) is transmission-connected to the drive shaft (802) on the corresponding side via a reciprocating transmission assembly (6); The two sets of rotating power members (801) drive the two sets of driving shafts (802) to rotate, and the transmission belts (204) drive the two sets of conveying chains (201) to intermittently convey the multiple sets of cultivation boxes (3), and drive the water supply pipes (403) to reciprocate and drive the multiple sets of spray branch pipes (405) to intermittently insert into the corresponding cultivation boxes (3); The intermittent transmission assembly (5) comprises a driving dial (502) and a driven grooved wheel (501); The driven sheave (501) is coaxially fixedly mounted on the end of the rotating shaft (2021) of the driving gear (202), and the driven sheave (501) is provided with a plurality of guide grooves spaced apart along its radial direction; The active dial wheel (502) is coaxially mounted on the end side of the driving shaft (802); a shifting rod (503) is fixedly mounted on the end surface of the active dial wheel (502) along its radial direction; a limiting column (504) is mounted on one end of the shifting rod (503) away from the center of the active dial wheel (502); the limiting column (504) is used for sliding engagement along the guide groove; The reciprocating transmission assembly (6) comprises a first transmission shaft (601), a second transmission shaft (602) and a transmission gear (605); The first transmission shaft (601) and the second transmission shaft (602) are rotatably mounted on the side plate of the cultivation box (3), and the ends of the first transmission shaft (601) and the second transmission shaft (602) are connected in transmission via a driven gear (603), wherein the first transmission shaft (601) is connected in transmission with the drive shaft (802) via a continuous transmission assembly (7), and the drive shaft (802) drives the first transmission shaft (601) to rotate synchronously, and a group of incomplete gears (604) are coaxially mounted on the shaft bodies of the first transmission shaft (601) and the second transmission shaft (602), respectively, and the transmission gear (605) is coaxially fixedly mounted on the end of the water supply pipe (403), and its two sides are connected in transmission with the two groups of incomplete gears (604), and the tooth surface ends of the two groups of incomplete gears (604) are alternately meshed with the transmission gear (605) for transmission; The continuous transmission assembly (7) comprises a transmission main gear (701) and a transmission sub gear (702); The transmission main gear (701) and the transmission sub-gear (702) are coaxially mounted on the drive shaft (802) and the first transmission shaft (601), respectively, and are meshedly connected. The gear diameter of the transmission main gear (701) is larger than the gear diameter of the transmission sub-gear (702).

2. A spraying device for cultivating watermelon seedlings in a greenhouse according to claim 1, characterized in that, The conveying chain (201) comprises a plurality of chain link units that rotate in sequence, the mounting post (205) is fixedly mounted on the middle of the chain link unit corresponding to the cultivation box (3), and a limiting ring for rotating the mounting post (205) is provided on the side plate of the cultivation box (3).

3. A spraying device for cultivating watermelon seedlings in a greenhouse according to claim 1, characterized in that, The rotary shaft (2021) of the driving gear (202) is connected to the driven shaft of the auxiliary gear (203) on the same side through a transmission belt (204).

4. A spraying device for cultivating watermelon seedlings in a greenhouse according to claim 1, characterized in that, The spray branch pipe (405) is arc-shaped, and a spray nozzle (406) is fixedly installed on the drainage port of the spray branch pipe (405).

5. A spraying device for cultivating watermelon seedlings in a greenhouse according to claim 1, characterized in that, A water pump (404) is installed in the water supply box (401), and the water pump (404) is connected to one end of the delivery pipe. A detachable water collection box (402) is provided at the bottom of the water supply pipe (403).

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