A walnut planting seedling maintenance device

Abstract

The present application relates to the technical field of sapling maintenance device, and specifically relates to a sapling maintenance device for walnut planting, which comprises a cultivation box, the inside of the cultivation box is filled with soil, the upper end face of the cultivation box is provided with a group of vertical plates on both sides, each group of the vertical plates is provided with two, the two vertical plates are fixedly connected to the upper end face of the cultivation box on both sides respectively, a longitudinal deep cultivation assembly is arranged between each group of the vertical plates, the longitudinal deep cultivation assembly is used for providing a downward unobstructed growth space for the straight root of the walnut seedling, the longitudinal deep cultivation assembly comprises a deep cultivation pipe, a plurality of wedges are uniformly and interval fixedly connected to the inner wall of the deep cultivation pipe, the inside of the deep cultivation pipe is used for planting the walnut seedling, and a water supply assembly is arranged at the lower end of the cultivation box. Compared with the prior art, the present application solves the problems of longitudinal guidance of the straight root of the walnut seedling, stable water supply and subsequent transplanting in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sapling maintenance devices, and particularly relates to a sapling maintenance device for walnut planting. BACKGROUND

[0002] Walnut is a typical straight-root fruit tree, and its taproot is developed and has strong vertical rooting capacity, and is suitable for deep, well-drained and strong aeration soil environment. In the cultivation process of walnut seedlings, the root structure of the seedlings has an important influence on the subsequent transplanting survival rate, growth and development level and stress resistance. In particular, the growth of the straight-root system directly determines the rooting depth of the plant and the water and fertilizer acquisition capacity.

[0003] However, in the existing seedling raising device or seedling raising method, the following problems exist:

[0004] Firstly, the existing seedling raising container is mostly shallow seedling tray or uniform flat seedling box, which is difficult to provide the vertical downward space suitable for the straight-root growth characteristics of the walnut seedlings, so that the taproot is bent and wound after encountering resistance at the bottom during growth, affecting the root development, and even causing root breakage, which greatly reduces the survival rate of the seedlings during transplanting. Although some seedling raising methods increase the depth of the seedling box to adapt to the downward growth of the straight root of the walnut seedlings, such methods often result in a significant increase in the soil filling amount in the seedling box, which not only increases the seedling raising cost, but also increases the overall weight and transportation difficulty of the device.

[0005] Secondly, most of the current seedling raising devices have simple water management structures, and water is usually supplied through surface sprinkling irrigation or bottom soaking, but there is no accurate control of the soil water retention state. Especially during the seedling raising process, uneven water supply can easily cause local water accumulation or water shortage, which not only affects the normal respiration of the root system, but also easily breeds diseases and reduces the quality of the seedlings.

[0006] Furthermore, in order to solve the problems in the prior art in the vertical guidance of the straight root of the walnut seedlings, stable water supply and convenient subsequent transplanting, the present application discloses a sapling maintenance device for walnut planting. SUMMARY

[0007] Therefore, the purpose of the present application is to provide a sapling maintenance device for walnut planting to solve the problems in the prior art in the vertical guidance of the straight root of the walnut seedlings, stable water supply and convenient subsequent transplanting.

[0008] Based on the above purpose, the present application provides a walnut seedling maintenance device for planting, comprising a cultivation box, the inside of the cultivation box is filled with soil, the upper end surface of the cultivation box is provided with a group of vertical plates on both sides, each group of vertical plates is provided with two, the two vertical plates are fixedly connected to the upper end surface of the cultivation box on both sides, a longitudinal deep cultivation assembly is arranged between each group of vertical plates, the longitudinal deep cultivation assembly is used for providing a downward unobstructed growth space for the straight root of the walnut seedling, the longitudinal deep cultivation assembly comprises a deep cultivation pipe, the inner wall of the deep cultivation pipe is uniformly and spacedly fixedly connected with a plurality of wedges, the inside of the deep cultivation pipe is used for planting walnut seedlings;

[0009] The lower end of the cultivation box is provided with a water supply assembly, the water supply assembly comprises a water absorption box fixedly connected to the lower end of the cultivation box, the inside of the water absorption box is used for storing the liquid required by the soil inside the cultivation box, and the water supply assembly is used to maintain the soil inside the cultivation box at a suitable moisture content.

[0010] Preferably, the upper end of the deep cultivation pipe is fixedly connected with a sliding frame, the lower end of the deep cultivation pipe is provided with a connecting rod on both sides, the connecting rod is provided in an L shape, the middle part of the connecting rod is fixedly connected with a rotating shaft, and the connecting rod is rotatably connected with the cultivation box through the rotating shaft.

[0011] Preferably, the upper and lower ends of the connecting rod are rotatably connected with rollers, the outer wall of the lower end of the deep cultivation pipe is fixedly connected with a triangular plate on both sides, the side end face of the triangular plate close to the connecting rod is inclinedly arranged, and the side end face of the triangular plate close to the connecting rod is in contact with the roller at the upper end of the connecting rod.

[0012] Preferably, the side close to the deep cultivation pipe of the lower end of the connecting rod is provided with a push plate, the surfaces of the deep cultivation pipe and the push plate are both porous structures for water transmission, the side end face of the push plate close to the connecting rod is in contact with the roller at the lower end of the connecting rod, one end of the side end face of the push plate close to the deep cultivation pipe is fixedly connected with a return spring, and the return spring is fixedly connected with the cultivation box.

[0013] Preferably, a mounting groove is formed in the inner side wall of the cultivation box, and the return spring is arranged in the mounting groove.

[0014] Preferably, the opposite faces of each group of vertical plates are provided with sliding grooves, the two ends of the sliding frame are slidably connected with the vertical plates through the sliding grooves, one side of the sliding frame is fixedly connected with an extension spring, and one end of the extension spring is fixedly connected with a limiting column.

[0015] Preferably, the upper and lower ends of one of the vertical plates in each group of vertical plates are provided with through holes, and the limiting column is clamped in the through holes.

[0016] Preferably, the upper end of the water absorption box is provided with a water absorption pad, the cultivation box has a hollow structure, the upper end of the water absorption pad is in contact with the soil inside the cultivation box, and multiple water absorption columns are evenly spaced and fixedly connected to the lower end of the water absorption pad, with the lower ends of the multiple water absorption columns extending into the interior of the water absorption box.

[0017] Preferably, the inside of the water absorption tank is provided with a float plate, a connecting frame is fixedly connected to one side of the float plate, and a baffle is fixedly connected to the middle of the connecting frame.

[0018] Preferably, a water storage tank is fixedly connected to the middle of one side end face of the incubation box, and a connecting pipe is fixedly connected to the lower end of the water storage tank. The lower end of the connecting pipe is connected to the water absorption tank, and the connection height between the connecting pipe and the water absorption tank is higher than the lowest end of the water absorption column. When the float is at the highest point, the baffle can block the connection between the connecting pipe and the water absorption tank. The end of the float near the baffle is longitudinally slidably connected to the water absorption tank. A drain pipe is fixedly connected to one side of the lower end of the water absorption tank, and a switch valve is installed on the drain pipe.

[0019] The beneficial effects of this invention are:

[0020] Effectively adapts to the vertical growth characteristics of walnut seedling taproots, reducing the amount of soil used for seedling cultivation and the burden of transportation:

[0021] By installing a longitudinally sliding deep-growing component inside the cultivation box, the deep-growing tube structure provides an independent space for the taproots of walnut seedlings to extend freely downwards. This avoids problems such as bending, coiling, and knotting caused by bottom obstruction during root growth, thus improving root development from the source, enhancing seedling quality, and increasing transplant survival rate. In particular, during seedling growth, the sliding frame drives the deep-growing tube to rise step by step, and the linkage structure drives the push plate to replenish soil to the roots layer by layer. In actual use, the height of the deep-growing tube can be adjusted according to the actual situation, thereby meeting the root growth space requirements without increasing the overall depth of the cultivation box. This significantly reduces the amount of soil filling, lowers seedling costs and box weight, and solves the cost and transportation difficulties caused by deepening the seedling box to accommodate taproot growth in existing technologies.

[0022] Construct a passive response water supply system to achieve precise and stable water regulation:

[0023] An independent water-absorbing tank is installed below the cultivation box, and a continuous capillary water supply path is constructed through the water-absorbing column and water-absorbing pad, so that water can be evenly infiltrated from the bottom to the entire soil layer, achieving stable water supply without power. At the same time, a passive closed-loop control water replenishment mechanism based on liquid level changes is formed by using a floating plate-baffle linkage structure. When the water level in the water-absorbing tank is too high, the floating plate automatically rises and drives the baffle to close the water inlet to prevent excessive water supply. When the water level drops, the water supply path is reopened to ensure continuous water supply. This system avoids the problem of "local water accumulation and local drought" common in traditional sprinkler or bottom immersion water supply, effectively inhibits the occurrence of diseases, ensures balanced root absorption, and helps improve the overall quality and survival rate of seedlings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the longitudinal deep-growing component of the present invention;

[0028] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the deep incubation tube of the present invention;

[0029] Figure 5 This is a three-dimensional structural diagram of the water supply component of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the water absorption tank of the present invention;

[0031] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0032] The following are labeled in the diagram: 1. Incubator; 2. Water Absorption Box; 3. Upright Plate; 4. Slide; 5. Slide Rack; 6. Deep Incubation Tube; 7. Water Storage Tank; 8. Drainage Pipe; 9. Water Absorption Pad; 10. Water Absorption Column; 11. Wedge; 12. Connecting Pipe; 13. Float; 14. Telescopic Spring; 15. Limiting Post; 16. Triangular Plate; 17. Connecting Rod; 18. Roller; 19. Push Plate; 20. Rotating Shaft; 21. Return Spring; 22. Baffle; 23. Connecting Frame. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] like Figures 1 to 7 As shown, a walnut seedling maintenance device includes a cultivation box 1, the inside of which is filled with soil. A set of upright plates 3 is provided on both sides of the upper end face of the cultivation box 1. Each set of upright plates 3 has two plates, which are fixedly connected to the two sides of the upper end face of the cultivation box 1. A longitudinal deep cultivation component is provided between each set of upright plates 3. The longitudinal deep cultivation component is used to provide a downward unobstructed growth space for the taproot of the walnut seedling. The longitudinal deep cultivation component includes a deep cultivation tube 6. Multiple wedges 11 are evenly spaced and fixedly connected to the inner wall of the deep cultivation tube 6. The inside of the deep cultivation tube 6 is used to plant walnut seedlings.

[0036] A slide 5 is fixedly connected to the upper end of the deep incubation tube 6. Connecting rods 17 are provided on both sides of the lower end of the deep incubation tube 6. The connecting rods 17 are L-shaped, and a rotating shaft 20 is fixedly connected to the middle of the connecting rods 17. The connecting rods 17 are rotatably connected to the incubation box 1 via the rotating shaft 20. Rollers 18 are rotatably connected to both the upper and lower ends of the connecting rods 17. Triangular plates 16 are fixedly connected to both sides of the lower end of the outer wall of the deep incubation tube 6. The end face of the triangular plate 16 near the connecting rod 17 is inclined, and the end face of the triangular plate 16 near the connecting rod 17 contacts the roller 18 at the upper end of the connecting rod 17. A push plate 19 is provided on the lower end of the connecting rod 17 near the deep incubation tube 6. The surfaces of both the deep incubation tube 6 and the push plate 19 are porous for water... In the transmission process, the end face of the push plate 19 near the connecting rod 17 contacts the roller 18 at the lower end of the connecting rod 17. A return spring 21 is fixedly connected to one end face of the push plate 19 near the deep incubation tube 6. The return spring 21 is fixedly connected to the incubation box 1. An installation groove is provided on the inner side wall of the incubation box 1. The return spring 21 is located inside the installation groove. A sliding groove 4 is provided on the opposite side of each set of upright plates 3. The two ends of the slide frame 5 are slidably connected to the upright plate 3 through the sliding groove 4. A telescopic spring 14 is fixedly connected to one side of the slide frame 5. A limit post 15 is fixedly connected to one end of the telescopic spring 14. A through hole is provided at the upper and lower ends of one of the upright plates 3 in each set of upright plates 3. The limit post 15 is locked inside the through hole.

[0037] Walnut seedlings or seedlings are placed at the top of the deep growing tube 6. After growing for a period of time, their taproots will gradually take root downwards along the inside of the deep growing tube 6. As the seedling grows taller and the root system extends, in order to prevent the root system from bending and coiling due to the bottom restriction in the original soil layer, the user can push the slide 5 to slide upwards in the slide groove 4 on the upright plate 3, thereby driving the deep growing tube 6 to be lifted upwards as a whole.

[0038] As the deep-growing tube 6 rises, a new cavity is formed between its bottom and the bottom of the cultivation box 1. At this time, the push plate 19 located below the deep-growing tube 6 will automatically rise under the action of the connecting rod 17 and the roller 18 to complete the filling of soil. Specifically, the middle part of the connecting rod 17 is rotatably connected to the cultivation box 1 via the rotating shaft 20. The connecting rod 17 has an L-shaped structure, and the roller 18 engaged at its upper end is always in contact with the inclined triangular plate 16 on the outer wall of the deep-growing tube 6. When the deep-growing tube 6 moves upward, the triangular plate 16 also rises and pushes the upper roller 18 of the connecting rod 17 through its inclined end face, driving the connecting rod 17 to rotate counterclockwise around the rotating shaft 20. This causes the lower roller 18 of the connecting rod 17 to push the push plate 19 in contact with it, thus moving it upward. Finally, the soil at the bottom of the cultivation box 1 is slowly pushed into the empty area at the bottom of the deep-growing tube 6, providing a support medium for the continued growth of the taproot.

[0039] To ensure that the push plate 19 returns to its initial position after the soil filling action, a return spring 21 is fixedly connected to one end face of it. The other end of the spring is fixedly connected to the inner wall of the cultivation box 1. When the push plate 19 moves upward, the return spring 21 is stretched, generating elastic potential energy. After the structure returns to its original position, it automatically contracts and pushes the push plate 19 back to its original position, completing the cycle. To ensure that the return spring 21 works stably for a long time in a moist soil environment and to avoid soil clogging or corrosion affecting its elastic performance, a placement groove is provided on the inner side wall of the cultivation box 1. The return spring 21 is placed inside the placement groove. This placement groove not only protects the spring from soil interference but also optimizes the internal space layout, improves the neatness of the structure and the reliability of the device.

[0040] In addition, to adapt to the adjustment requirements of the height of the deep seedling tube 6 at different seedling stages, the two ends of the slide frame 5 are slidably connected in the slide groove 4. A telescopic spring 14 is fixedly connected to one side of the slide frame 5, and a limiting post 15 is provided at its free end. The limiting post 15 can be inserted into the through hole opened on the upright plate 3 to realize multi-level limiting and stable support of the rising height of the deep seedling tube 6. Through the combined use of the above structures, the deep seedling space can be flexibly adjusted according to the growth needs of the seedlings, and soil can be added downwards step by step. This not only meets the depth requirements of the taproot growth of walnut seedlings, but also effectively reduces the soil consumption, device weight and seedling cost caused by deepening the whole box.

[0041] like Figures 1 to 7 As shown, the lower end of the cultivation box 1 is equipped with a water supply component, which is used to continuously provide the required water to the soil layer inside the box to maintain the stable water environment required by the walnut seedlings during the seedling stage, and avoid problems such as seedling wilting or root stagnation due to water shortage caused by soil dryness. The water supply component includes a water absorption box 2 set at the bottom of the cultivation box 1. The water absorption box 2 can be made of polypropylene (PP) or polyethylene (PE) material with good sealing properties, and is used to hold clean water, nutrient solution or seedling special solution.

[0042] A water-absorbing pad 9 is fixedly installed at the upper part of the inside of the water-absorbing box 2. The water-absorbing pad 9 can be made of hydrophilic polyester fiber non-woven fabric, polypropylene felt and other materials, which have good water retention and water permeability. Its upper end is in direct contact with the soil layer filled inside the cultivation box 1 to form a stable water seepage interface, so that the water absorption process can be completed naturally by capillary action without the need for an additional power device.

[0043] Multiple absorbent columns 10 are evenly spaced and fixedly connected to the lower end of the absorbent pad 9. The absorbent columns 10 are hollow tubular structures, and their materials can be hydrophilic cotton core, foam rope core or soft capillary tube. They have good liquid siphon and capillary climbing ability. Multiple absorbent columns 10 penetrate the bottom plate of the incubator 1 from top to bottom and extend into the liquid layer of the absorbent box 2, forming a series of water conduction paths. This allows the liquid to be continuously transferred through the absorbent columns 10 to the absorbent pad 9 and then evenly distributed into the soil layer in the incubator 1, thereby maintaining the soil in a suitable moist state.

[0044] To achieve intelligent water level regulation and avoid over-supply, a float plate 13 is installed inside the water suction tank 2. The float plate 13 can be made of lightweight plastic material such as foamed PP board, and its buoyancy controls water level changes. When the liquid level in the water suction tank 2 rises, the float plate 13 floats up accordingly. A baffle 22 is fixedly connected to one side of the float plate 13 through a connecting frame 23. The connecting frame 23 is a rigid connector with a hinge in the middle for adjusting the angle of the baffle 22.

[0045] The baffle 22 is used to block and control the outlet of the connecting pipe 12. One end of the connecting pipe 12 is connected to the water absorption tank 2, and the other end is connected to the water storage tank 7 located in the middle of the side end face of the incubator 1. The water storage tank 7 is a backup water source. When the liquid level in the water absorption tank 2 is lower than the preset value, water can be automatically replenished into the water absorption tank 2 through the connecting pipe 12.

[0046] To achieve automatic opening and closing control, the outlet of the connecting pipe 12, which connects to the water tank 2, is positioned at a height higher than the lowest end of the water suction column 10. When the liquid level in the water tank 2 rises to near saturation, the float 13 will also rise to its highest point. At this time, the baffle 22 is driven by the connecting frame 23 to precisely block the outlet of the connecting pipe 12, thereby preventing further water replenishment. When the water level drops, the float 13 sinks, and the baffle 22 automatically opens the water inlet to complete the next liquid replenishment process.

[0047] To ensure long-term operational stability, the float 13 and the water tank 2 are connected in a longitudinal sliding manner, meaning that the float 13 can rise and fall freely in the vertical direction. Its guide edge is provided with a guide groove structure to prevent lateral drift or jamming, ensuring accurate and reliable operation.

[0048] In addition, a drain pipe 8 is fixedly connected to one side of the bottom of the water tank 2. The drain pipe 8 is a cleaning and liquid replacement channel. A switch valve is installed on it for quick drainage when the water absorption liquid needs to be replaced or the inside of the tank needs to be cleaned. The switch valve can be a manual knob type or a quick ball valve type, with good sealing performance and convenient operation.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0050] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A seedling care device for walnut planting, comprising a cultivation box (1), wherein the interior of the cultivation box (1) is filled with soil, characterized in that: The upper surface of the cultivation box (1) is provided with a set of upright plates (3) on both sides. Each set of upright plates (3) has two plates. The two upright plates (3) are fixedly connected to the upper surface of the cultivation box (1) on both sides. A longitudinal deep cultivation component is provided between each set of upright plates (3). The longitudinal deep cultivation component is used to provide a downward unobstructed growth space for the taproot of the walnut seedling. The longitudinal deep cultivation component includes a deep cultivation tube (6). Multiple wedges (11) are fixedly connected evenly at intervals on the inner wall of the deep cultivation tube (6). The inside of the deep cultivation tube (6) is used to plant walnut seedlings. The lower end of the cultivation box (1) is provided with a water supply component, which includes a water absorption box (2) fixedly connected to the lower end of the cultivation box (1). The interior of the water absorption box (2) is used to store the liquid required by the soil inside the cultivation box (1). The water supply component is used to maintain the appropriate moisture content of the soil inside the cultivation box (1). The upper end of the deep incubation tube (6) is fixedly connected to a slide (5), and both sides of the lower end of the deep incubation tube (6) are provided with connecting rods (17). The connecting rods (17) are L-shaped, and the middle part of the connecting rods (17) is fixedly connected to a rotating shaft (20). The connecting rods (17) are rotatably connected to the incubation box (1) through the rotating shaft (20). Rollers (18) are rotatably connected to both the upper and lower ends of the connecting rod (17). Triangular plates (16) are fixedly connected to both sides of the lower end of the outer wall of the deep breeding tube (6). The end face of the triangular plate (16) near the connecting rod (17) is inclined, and the end face of the triangular plate (16) near the connecting rod (17) is in contact with the roller (18) at the upper end of the connecting rod (17). A push plate (19) is provided on the side of the lower end of the connecting rod (17) near the deep incubation tube (6). The surfaces of the deep incubation tube (6) and the push plate (19) are porous for water transfer. The end face of the push plate (19) near the connecting rod (17) is in contact with the roller (18) at the lower end of the connecting rod (17). A return spring (21) is fixedly connected to one end of the end face of the push plate (19) near the deep incubation tube (6). The return spring (21) is fixedly connected to the incubation box (1). The incubator (1) has a placement groove on its inner side wall, and the reset spring (21) is located inside the placement groove.

2. The walnut seedling maintenance device according to claim 1, characterized in that: Each set of the upright plates (3) has a sliding groove (4) on the opposite side. The two ends of the slide frame (5) are slidably connected to the upright plate (3) through the sliding groove (4). A telescopic spring (14) is fixedly connected to one side of the slide frame (5), and a limit post (15) is fixedly connected to one end of the telescopic spring (14).

3. The walnut seedling maintenance device according to claim 2, characterized in that: Each of the vertical plates (3) in each group has through holes at the upper and lower ends of one of the vertical plates (3), and the limiting post (15) is locked inside the through hole.

4. The walnut seedling maintenance device according to claim 3, characterized in that: The upper end of the water-absorbing box (2) is provided with a water-absorbing pad (9). The cultivation box (1) has a hollow structure. The upper end of the water-absorbing pad (9) is in contact with the soil inside the cultivation box (1). The lower end of the water-absorbing pad (9) is evenly spaced and fixedly connected with multiple water-absorbing columns (10). The lower ends of the multiple water-absorbing columns (10) all extend into the interior of the water-absorbing box (2).

5. The walnut seedling maintenance device according to claim 4, characterized in that: The water tank (2) is equipped with a float plate (13) inside. A connecting frame (23) is fixedly connected to one side of the float plate (13), and a baffle (22) is fixedly connected to the middle of the connecting frame (23).

6. The walnut seedling maintenance device according to claim 5, characterized in that: A water tank (7) is fixedly connected to the middle of one side end face of the incubation box (1). A connecting pipe (12) is fixedly connected to the lower end of the water tank (7). The lower end of the connecting pipe (12) is connected to the water suction box (2). The connection height between the connecting pipe (12) and the water suction box (2) is higher than the lowest end of the water suction column (10). When the float (13) is at the highest point, the baffle (22) can block the connection between the connecting pipe (12) and the water suction box (2). The end of the float (13) near the baffle (22) is longitudinally slidably connected to the water suction box (2). A drain pipe (8) is fixedly connected to one side of the lower end of the water suction box (2). A switch valve is installed on the drain pipe (8).

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