A spraying device for preventing diseases and insect pests in corn planting

Abstract

The invention relates to the technical field of agricultural pest control drug spraying devices, and discloses a pest control spraying device for corn planting, wherein a wheel drives a roller to rotate, and a rotating column connected in rotation is arranged at an eccentric position on the roller, one end of a rocker passes through the rotating column, and the other end of the rocker is connected to a rotating member, and the water tank also includes: a pressurized pipe, a liquid inlet and a liquid outlet are arranged at the bottom; a lifting column, a nut sleeve is fixedly connected to the top, and an array of fixed blocks and multiple groups of elastic blocks are arranged on the side from top to bottom, and a screw rod driven to rotate by the rotating member is threadedly connected to the nut sleeve, and the reciprocating rotation of the screw rod drives the lifting column to move up and down reciprocatingly; a piston sleeve is sleeved on the side of the lifting column, and the upper and lower ends are fixed by a fixed block or an elastic block. The height of the piston sleeve is automatically adjusted according to the liquid level in the water tank, so that it is easier to absorb the liquid in the water tank, and since the power for the lifting and lowering of the piston sleeve comes from the wheel, the resistance to the wheel is also kept balanced.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural pest control medicine spraying devices, in particular to a pest control spraying device for corn planting. Background Art

[0002] The pest control spraying device for corn planting is a mechanical device specially designed for accurately spraying pesticides in corn fields to prevent and control pests and diseases. These devices play a vital role in the growth process of corn. The pest control spraying device can accurately control the spraying amount and spraying range of pesticides, ensuring that the pesticides can directly act on the areas where pests and diseases occur, thereby improving the prevention and control effect. Through precise spraying, the waste of pesticides and environmental pollution can be reduced, while reducing accidental damage to corn and other beneficial organisms.

[0003] In the prior art, using the rotation of the wheel body to drive the pesticide spraying can reduce labor costs or electric costs. For example, the patent document with the patent publication number CN117941671A discloses a drug spraying device for agricultural pest control, including a square frame support plate, a swing assembly connected to the transmission assembly and the spraying pipe respectively arranged on the fixed frame, an adjustment frame arranged on the swing assembly, a pneumatic mixing assembly connected to the swing assembly installed on the drug storage assembly, and a steering assembly connected to the handle assembly arranged between the two rear wheel assemblies. No additional motor drive is required, which reduces the power consumption in the drug spraying work and reduces the later use cost to a certain extent.

[0004] However, since the force of the wheel rotation is used to drive the pesticide extraction, when the liquid level in the water tank drops, the extraction force may be insufficient or the wheel rotation may be seriously affected. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a pest and disease prevention spraying device for corn planting, which solves the problem that the extraction force is insufficient or the rotation of the wheels is seriously affected after the liquid level in the water tank drops.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A pest and disease prevention spraying device for corn planting, comprising a frame, a wheel and a water tank are installed on the frame, the frame comprises a handlebar and a support rod, a spraying member is arranged on the support rod, the spraying member is connected to the water tank through an infusion tube, a water tank cover and a rotating member are arranged on the water tank, the wheel drives a roller to rotate through a transmission connection, a rotating column connected to rotation is arranged at an eccentric position on the roller, one end of a rocker passes through the rotating column, and the other end of the rocker is connected to the rotating member, and the water tank also includes:

[0010] A pressurized tube, wherein a liquid inlet and a liquid outlet are provided at the bottom of the pressurized tube, the liquid outlet is connected to the infusion tube, and the liquid inlet is connected to the inside of the water tank;

[0011] The lifting column has a nut sleeve fixed on the top, and a group of fixed blocks and multiple groups of elastic spring blocks are arranged in an array from top to bottom on the side. The screw rod driven by the rotating member is threadedly connected to the nut sleeve, and the reciprocating rotation of the screw rod drives the lifting column to move up and down reciprocatingly;

[0012] The piston sleeve is sleeved on the side of the lifting column and fixed at the upper and lower ends by a fixing block or a spring block;

[0013] When the liquid level in the water tank drops, the resistance to the upward pull of the piston sleeve increases, causing the spring block at the bottom of the piston sleeve to retract inward, causing the piston sleeve to drop. After the piston sleeve drops for a certain distance, the top is fixed by the spring block that pops out again, and the bottom is fixed by the next group of spring blocks. At this time, the lifting column does not drive the piston sleeve to rise when it rises, but drives the piston sleeve to drop again when it drops, causing the liquid level in the pressurized pipe to drop. This avoids insufficient suction to suck the liquid from the water tank into the pressurized pipe due to the drop in the liquid level in the water tank, and also ensures that the resistance to the wheel remains balanced.

[0014] Preferably, a pull rod is fixedly connected to the top of the piston sleeve, and the top of the pull rod passes through the top of the water tank. A pull ring is provided on the top of the pull rod. The pull ring and the pull rod are used to reset the piston sleeve when adding liquid. The pull rod is also used to display the liquid level height in the pressurized tube, thereby reflecting the remaining liquid level height in the water tank.

[0015] Preferably, the liquid inlet and the liquid outlet are one-way valves, the liquid inlet is used to pass the liquid transferred from the water tank to the pressurized pipe, and the liquid outlet is used to pass the liquid transferred from the pressurized pipe to the infusion pipe.

[0016] Preferably, the top of the lifting column is fixed to the bottom of the nut sleeve through a connecting rod, a fixed fixing seat is provided in the pressure tube, a guide column is provided above the nut sleeve, the guide column passes through the fixing seat, the pull rod also passes through the fixing seat, and a through hole is reserved on the fixing seat.

[0017] Preferably, the fixing block is fixed above the side of the lifting column, the lower side of the fixing block is a plane, the spring block array is below the fixing block, each spring block is provided with a spring, and the upper and lower sides of the spring block are inclined surfaces.

[0018] Preferably, a swivel is provided on the rotating member, and the rocker comprises two straight rods connected at right angles, the bottom of one section slides in the through hole on the rotating column, and the other section passes through the swivel. When the roller rotates, the rotating column drives the rocker to swing left and right, thereby driving the rotating member to rotate left and right.

[0019] Preferably, a gear transmission is provided in the rotating member, and the large gear drives the small gear to rotate to increase the rotation angle of each swing, and drives the screw to rotate.

[0020] Preferably, the spraying member includes an infusion tube, a main liquid tube and a nozzle, the infusion tube is connected to the main liquid tube, the main liquid tube is slidably connected to the support rod for adjusting the height of the main liquid tube, and the nozzle is connected to both ends of the main liquid tube for spraying the solution transported from the infusion tube.

[0021] Preferably, the top end of the pressurizing tube is isolated from the inside of the water tank, the portion of the pressurizing tube on the piston sleeve is connected upward to the outside of the water tank, and the portion of the pressurizing tube on the piston sleeve is added with lubricating oil.

[0022] Preferably, the top end of the pressurizing tube is connected to the inside of the water tank, and the high pressure brought by the rising piston sleeve is used to squeeze the liquid in the water tank to flow into the bottom of the pressurizing tube.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a pest and disease prevention spraying device for corn planting, which has the following beneficial effects:

[0025] 1. The corn planting pest and disease prevention spraying device is provided with a fixing block and a nut sleeve on the lifting column. When the lifting column moves up and down, the upper and lower ends of the piston sleeve are fixed by the fixing block or the spring block. After the liquid level in the water tank drops, the pressure on the piston sleeve when it rises to absorb liquid increases, causing the spring block to retract. At this time, the lifting column rises without driving the piston sleeve to rise. When the lifting column drops, the spring block that pops out again and the next group of spring blocks respectively fix the upper and lower ends of the piston sleeve, and the height of the piston sleeve is automatically adjusted according to the liquid level in the water tank, so that it is easier to absorb the liquid in the water tank. Since the power for the lifting and lowering of the piston sleeve comes from the wheel, the resistance on the wheel is also kept balanced.

[0026] 2. By connecting a pull rod above the piston sleeve and connecting a pull ring to the top of the pull rod, after re-adding pesticide into the water tank, the height of the piston sleeve can be raised by pulling the pull ring and the pull rod. In addition, the height of the pull rod can also be used to display the liquid level height in the pressurized pipe, thereby reflecting the remaining liquid level height in the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the structure inside the water tank of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure inside the pressurized tube of the present invention.

[0030] Figure 4 It is a schematic structural diagram of the connection between the rotating part, the lifting column and the piston sleeve of the present invention.

[0031] Figure 5 It is a schematic structural diagram of the lifting column of the present invention.

[0032] Figure 6 It is a structural schematic diagram of the rotating part of the present invention.

[0033] Figure 7 It is a structural schematic diagram of the piston sleeve of the present invention.

[0034] Figure 8 The figure is a schematic diagram of the structure of the connection between the roller, the rotating column and the rocker of the present invention.

[0035] Fig. 9 It is a schematic diagram of the structure in which the rocker of the present invention is connected to the swivel.

[0036] Fig.10 It is a schematic structural diagram of the spraying member of the present invention.

[0037] In the figure: 1. frame; 2. wheels; 3. spray parts; 4. water tank;

[0038] 11. Handlebar; 12. Support rod;

[0039] 21. Roller; 22. Rotating column; 23. Rocker;

[0040] 31. Infusion tube; 32. Main liquid tube; 33. Nozzle;

[0041] 41. Rotating part; 412. Swivel; 411. Screw; 42. Water tank cover; 43. Lifting column; 431. Fixed block; 432. Spring block; 433. Nut sleeve; 434. Guide column; 435. Connecting rod; 44. Piston sleeve; 441. Pull rod; 442. Pull ring; 45. Pressurizing pipe; 451. Liquid inlet; 452. Liquid outlet; 453. Fixed seat. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0043] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] Embodiment 1:

[0046] This embodiment provides a pest and disease prevention spraying device for corn planting, which has the following technical features.

[0047] See also Figure 1-10 A pest and disease prevention spraying device for corn planting, comprising a frame 1, a wheel 2 and a water tank 4 are installed on the frame 1, the frame 1 comprises a handlebar 11 and a support rod 12, a spraying member 3 is arranged on the support rod 12, the spraying member 3 is connected to the water tank 4 through an infusion tube 31, a water tank cover 42 and a rotating member 41 are arranged on the water tank 4, the wheel 2 drives the roller 21 to rotate through a transmission connection, a rotating column 22 connected in rotation is arranged at an eccentric position on the roller 21, one end of a rocker 23 passes through the rotating column 22, and the other end of the rocker 23 is connected to the rotating member 41, and the water tank 4 also includes:

[0048] A pressurized tube 45, wherein a liquid inlet 451 and a liquid outlet 452 are provided at the bottom of the pressurized tube 45, wherein the liquid outlet 452 is connected to the infusion tube 31, and the liquid inlet 451 is connected to the inside of the water tank 4;

[0049] The lifting column 43 has a nut sleeve 433 fixed on the top, and a group of fixed blocks 431 and multiple groups of elastic spring blocks 432 arranged in an array from top to bottom on the side. The screw rod 411 driven to rotate by the rotating member 41 is threadedly connected to the nut sleeve 433, and the reciprocating rotation of the screw rod 411 drives the lifting column 43 to move up and down reciprocatingly;

[0050] The piston sleeve 44 is sleeved on the side of the lifting column 43 and fixed at the upper and lower ends by a fixing block 431 or a spring block 432 .

[0051] By arranging a fixing block 431 and a nut sleeve 433 on the lifting column 43, when the lifting column 43 moves up and down, the fixing block 431 or the spring block 432 fixes the upper and lower ends of the piston sleeve 44. After the liquid level in the water tank 4 drops, the pressure on the piston sleeve 44 when it rises to absorb liquid increases, causing the spring block 432 to retract. At this time, the lifting column 43 does not drive the piston sleeve 44 to rise when it rises, and the spring block 432 and the next group of spring blocks 432 that pop up again when the lifting column 43 drops fix the upper and lower ends of the piston sleeve 44 respectively, and the height of the piston sleeve 44 is automatically adjusted according to the height of the liquid level in the water tank 4, so that it is easier to absorb the liquid in the water tank 4. Since the power for the lifting and lowering of the piston sleeve 44 comes from the wheel 2, the resistance on the wheel 2 is also kept balanced.

[0052] It should be noted that the roller 21 is connected to the sprocket on the wheel 2 through a chain drive, and the rotating column 22 is rotatably connected to a fixed position at the eccentric part of the roller 21. A through hole is provided on the rotating column 22, and the rocker 23 passes through the through hole. When the roller 21 rotates, the height position of the rocker 23 remains unchanged, the rotating column 22 slides up and down relative to the rocker 23, and the rotating column 22 swings left and right relative to the roller 21.

[0053] In an optional embodiment, after the pesticide in the water tank 4 is used up, it is necessary to reopen the water tank cover 42 to add solution into the water tank 4, and at this time, it is necessary to raise the height of the piston sleeve 44 again. Therefore, a pull rod 441 is fixedly connected to the top of the piston sleeve 44, and the top of the pull rod 441 passes through the top of the water tank 4. A pull ring 442 is provided on the top of the pull rod 441. The pull ring 442 and the pull rod 441 are used to reset the piston sleeve 44 when adding liquid. The pull rod 441 is also used to display the liquid level height in the pressurized tube 45, thereby reflecting the remaining liquid level height in the water tank 4.

[0054] By connecting a pull rod 441 above the piston sleeve 44 and connecting a pull ring 442 to the top of the pull rod 441, after re-adding pesticide into the water tank 4, the height of the piston sleeve 44 can be raised by pulling the pull ring 442 and the pull rod 441, and the height of the pull rod 441 can also be used to display the liquid level height in the pressurized pipe 45, thereby reflecting the remaining liquid level height in the water tank 4.

[0055] It should be noted that in order to better display the height of the pull rod 441, a scale can be set on the pull rod 441. In order to facilitate disassembly, the pull ring 442 can be connected to the top of the pull rod 441 through a thread. In order to make pulling the piston sleeve 44 smoother, multiple pull rods 441 can be set circumferentially distributed on the piston sleeve 44, and then the tops of each pull rod 441 are connected together for pulling.

[0056] In an optional embodiment, the liquid inlet 451 and the liquid outlet 452 are one-way valves, the liquid inlet 451 is used to pass the liquid transferred from the water tank 4 to the pressurized pipe 45, and the liquid outlet 452 is used to pass the liquid transferred from the pressurized pipe 45 to the infusion pipe 31.

[0057] It should be noted that, in order to prevent impurities from entering the pressurizing pipe 45 and the spraying member 3 , a filter screen may be provided on the liquid inlet 451 and the liquid outlet 452 .

[0058] In an optional embodiment, the top of the lifting column 43 is fixed to the bottom of the nut sleeve 433 through a connecting rod 435, a fixed fixing seat 453 is arranged in the pressurizing tube 45, a guide column 434 is arranged above the nut sleeve 433, the guide column 434 passes through the fixing seat 453, the pull rod 441 also passes through the fixing seat 453, and a through hole is reserved on the fixing seat 453.

[0059] It should be noted that the through hole on the fixing seat 453 is to prevent the fixing seat 453 and the piston sleeve 44 from forming a seal, so that the piston sleeve 44 is not affected by high pressure when it rises.

[0060] In an optional embodiment, the fixed block 431 is fixed above the side of the lifting column 43, the lower side of the fixed block 431 is a plane, the spring blocks 432 are arrayed below the fixed block 431, each spring block 432 is provided with a spring, and the upper and lower sides of the spring blocks 432 are inclined surfaces.

[0061] It should be noted that the bottom surfaces of the fixing blocks 431 in the same group are flush, and the upper and lower surfaces of the spring blocks 432 in the same group are flush. In order to make the downward pressure of the piston sleeve 44 more stable, the lower inclined surface of the spring block 432 can be set closer to the horizontal than the upper inclined surface.

[0062] In an optional embodiment, a swivel 412 is provided on the rotating member 41, and the rocker 23 includes two straight rods connected at right angles, the bottom of one section slides in the through hole on the rotating column 22, and the other section passes through the swivel 412. When the roller 21 rotates, the rotating column 22 drives the rocker 23 to swing left and right, thereby driving the rotating member 41 to rotate left and right.

[0063] It should be noted that, in order to prevent the roller 21 from driving the rotating member 41 to rotate when spraying is not required, the rotating ring 412 and the rocker 23 are set to be detachably connected, such as fixed with bolts, and the rocker 23 is removed when not in use.

[0064] In an optional embodiment, in order to increase the amount of liquid sprayed each time the piston sleeve 44 moves back and forth, a gear transmission is provided in the rotating member 41, and the large gear drives the small gear to rotate to increase the rotation angle of each swing and drive the screw 411 to rotate.

[0065] In an optional embodiment, since the height of corn varies greatly during the growth stage when it is planted, it is necessary to adapt to spraying work at different heights. The spraying member 3 includes an infusion tube 31, a main liquid tube 32 and a nozzle 33. The infusion tube 31 is connected to the main liquid tube 32, and the main liquid tube 32 is slidably connected to the support rod 12 for adjusting the height of the main liquid tube 32. The nozzle 33 is connected to both ends of the main liquid tube 32 for spraying the solution transported from the infusion tube 31.

[0066] It should be noted that, in order to adapt to corn planting fields of different widths, the nozzle 33 can be slidably connected in the main liquid pipe 32, so that the extended length of the nozzle 33 can be adjusted.

[0067] In an optional embodiment, the top of the pressurizing tube 45 is isolated from the water tank 4, the part of the pressurizing tube 45 on the piston sleeve 44 is connected to the outside of the water tank 4, and the part of the pressurizing tube 45 on the piston sleeve 44 is added with lubricating oil;

[0068] Alternatively, the top end of the pressurizing tube 45 is connected to the water tank 4 , and the high pressure brought by the rising piston sleeve 44 is used to squeeze the liquid in the water tank 4 to flow into the bottom of the pressurizing tube 45 .

[0069] Working principle: when the liquid level in the water tank 4 drops, the resistance to the upward pull of the piston sleeve 44 increases, causing the spring block 432 at the bottom of the piston sleeve 44 to retract inward, causing the piston sleeve 44 to drop. After the piston sleeve 44 drops for a while, the top is fixed by the spring block 432 that pops out again, and the bottom is fixed by the next group of spring blocks 432. At this time, when the lifting column 43 rises, it does not drive the piston sleeve 44 to rise, but when the lifting column 43 drops, it drives the piston sleeve 44 to drop again, causing the liquid level in the pressurized pipe 45 to drop, thereby avoiding the suction force that is insufficient to suck the liquid from the water tank 4 into the pressurized pipe 45 due to the drop in the liquid level in the water tank 4, and also ensuring that the resistance to the wheel 2 remains balanced.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spraying device for preventing pests and diseases in corn planting, comprising a frame (1), wherein the frame (1) is provided with wheels (2), a water tank (4), a handlebar (11) and a support rod (12), wherein the support rod (12) is provided with a spraying member (3), wherein the spraying member (3) is connected to the water tank (4) via a liquid infusion tube (31), and wherein the water tank (4) is provided with a water tank cover (42) and a rotating member (41), wherein the device is characterized in that: The wheel (2) drives the roller (21) to rotate through a transmission connection, a rotation column (22) for rotation connection is provided at an eccentric position on the roller (21), one end of a rocker (23) passes through the rotation column (22), and the other end of the rocker (23) is connected to the rotating member (41); The water tank (4) also includes: A pressurized tube (45), wherein a liquid inlet (451) and a liquid outlet (452) are provided at the bottom of the pressurized tube (45), wherein the liquid outlet (452) is connected to the infusion tube (31), and the liquid inlet (451) is connected to the interior of the water tank (4); A lifting column (43) is fixedly connected to a nut sleeve (433) at the top, and a group of fixed fixing blocks (431) and a plurality of groups of elastic spring blocks (432) are arranged in an array from top to bottom on the side. The screw rod (411) driven to rotate by the rotating member (41) is threadedly connected to the nut sleeve (433), and the reciprocating rotation of the screw rod (411) drives the lifting column (43) to reciprocate up and down. The piston sleeve (44) is sleeved on the side of the lifting column (43) and fixed at the upper and lower ends by a fixing block (431) or a spring block (432); The top end of the piston sleeve (44) is fixedly connected to a pull rod (441), the top end of the pull rod (441) passes through the top of the water tank (4), and the top end of the pull rod (441) is provided with a pull ring (442). The pull ring (442) and the pull rod (441) are used to reset the piston sleeve (44) when adding liquid. The pull rod (441) is also used to display the liquid level height in the pressurizing tube (45), thereby reflecting the remaining liquid level height in the water tank (4); the top end of the lifting column (43) is fixed to the bottom of the nut sleeve (433) through a connecting rod (435), a fixed fixing seat (453) is provided in the pressurizing tube (45), and a guide column (434) is provided above the nut sleeve (433). The column (434) passes through the fixed seat (453), and the pull rod (441) also passes through the fixed seat (453), and the fixed seat (453) is provided with a through hole; the fixed block (431) is fixed at a position above the side of the lifting column (43), the lower side of the fixed block (431) is a plane, and the spring blocks (432) are arranged in an array below the fixed block (431), and each spring block (432) is provided with a spring, and the upper and lower sides of the spring blocks (432) are inclined surfaces; a rotating ring (412) is provided on the rotating member (41), and the rocker (23) includes two straight rods connected at right angles, the bottom of one section slides in the through hole on the rotating column (22), and the other section passes through the rotating ring (412); The top end of the pressurizing tube (45) is isolated from the water tank (4), the portion of the pressurizing tube (45) on the piston sleeve (44) is connected upward to the outside of the water tank (4), and lubricating oil is added to the portion of the pressurizing tube (45) on the piston sleeve (44); or, the top end of the pressurizing tube (45) is connected to the water tank (4), and the high pressure brought by the rising piston sleeve (44) is used to squeeze the liquid in the water tank (4) into the bottom of the pressurizing tube (45).

2. A corn planting pest and disease prevention spraying device according to claim 1, characterized in that: The liquid inlet (451) and the liquid outlet (452) are one-way valves.

3. A corn planting pest and disease prevention spraying device according to claim 1, characterized in that: The rotating member (41) is provided with a gear transmission, and the large gear drives the small gear to rotate to increase the rotation angle of each swing, and drives the screw rod (411) to rotate.

4. A corn planting pest and disease prevention spraying device according to claim 1, characterized in that: The spraying member (3) comprises a liquid infusion tube (31), a main liquid tube (32) and a nozzle (33); the liquid infusion tube (31) is connected to the main liquid tube (32); the main liquid tube (32) is slidably connected to a support rod (12) for adjusting the height of the main liquid tube (32); the nozzle (33) is connected to both ends of the main liquid tube (32) for spraying the solution transported from the liquid infusion tube (31).

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