A well cellar filling and sealing fertilizer device

Abstract

The application discloses a well cellar filling and sealing topdressing device, which comprises a connecting column, a filling and sealing mechanism A for filling and sealing a well cellar is arranged at the bottom of the connecting column, a filling and sealing mechanism B for filling and sealing a film opening and a topdressing mechanism for quantitative topdressing are arranged outside the connecting column, the filling and sealing mechanism A comprises four inclined gathering rods which are hinged at the bottom of the connecting column and are axisymmetric, L-shaped connecting rods are fixedly connected to the ends of the four inclined gathering rods away from the connecting column, and filling and sealing inserts are fixedly connected to the ends of the L-shaped connecting rods away from the inclined gathering rods. In the application, the four filling and sealing inserts are inserted into the soil around the well cellar by pressing the connecting column downward, the soil around the well cellar is gathered between the well cellar and the tobacco seedling roots by pressing the foot pedals, and the effect of filling and sealing the well cellar is achieved; the soil in the low ditch is filled and sealed between the outer circle of the well cellar and the outer circle of the film opening by the filling and sealing mechanism B, and the effect of filling and sealing the film opening is achieved.

Description

Technical Field

[0001] This invention relates to the field of agricultural implements technology, and in particular to a well filling and topdressing device. Background Technology

[0002] With the increasing calls for tobacco control, the tobacco industry faces increasingly severe challenges, making the improvement of tobacco leaf quality particularly important. Scientific transplanting methods are a key factor in producing high-quality tobacco. The well-cellar transplanting technique for flue-cured tobacco is an improved method of transplanting seedlings under plastic film. Its principle is that as external temperature and humidity change, the hydraulic gradient created within the well causes soil moisture to evaporate or condense, thus maintaining relative stability in temperature and humidity within the well. This provides a suitable temperature, humidity, and nutrient environment for the seedlings during the optimal transplanting season. When using the well-cellar transplanting technique, firstly, plastic film is laid over each ridge of the tobacco field, and the sloping sides of the film (located on both sides of the ridge) are covered and compacted with soil. Then, holes are punched in the ridges using a hole puncher, and the seedlings are transplanted into the holes. When the seedlings grow to a certain size, the holes previously punched in the plastic film are enlarged, and the well is filled and fertilized.

[0003] A search revealed Chinese utility model patent CN 212588810 U, which discloses a well filling and topdressing device, comprising a soil sealing system and a topdressing system. The soil sealing system consists of two operating rods, a bearing connecting device, and two soil sealing rods. One end of each operating rod has a handle, and the soil sealing rods are welded to the other end of the operating rods, with the welded joint connected by the bearing connecting device. The topdressing system consists of a backpack fertilizer tank, a fertilizer delivery pipe, a fertilizer metering regulator, a limiting plate, a fertilizer output pipe, and a fertilizer outlet pipe. The fertilizer outlet at the bottom of the backpack fertilizer tank is connected to one end of the fertilizer delivery pipe, and the other end of the fertilizer delivery pipe is connected to the inlet of the fertilizer metering regulator. One end of the fertilizer output pipe is connected to the fertilizer outlet of the fertilizer metering regulator, and the other end is connected to the fertilizer outlet pipe. The limiting plate is fixed to the two operating rods, and the fertilizer metering regulator is installed in the gap of the limiting plate. Compared with existing technologies, this Chinese utility model patent with patent number CN 212588810 U can complete drilling, soil sealing and fertilization in one step, overcoming the time-consuming and labor-intensive defects of existing field management processes, improving efficiency, and is suitable for seedling transplanting of crops such as flue-cured tobacco, tomatoes, and peppers.

[0004] However, the above-mentioned well-filling and topdressing device achieves the filling effect of well filling by inserting the sealing rod into the soil and tightening the two operating rods. It is also not convenient to fill the soil around the membrane opening to make the overall shape a bowl shape with a low center and high edges. Therefore, a well-filling and topdressing device with good filling effect and easy to press the membrane opening is needed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the unsatisfactory sealing effect of filling wells and pits by inserting sealing rods into the soil and tightening two operating rods, and the difficulty in filling the perimeter of the membrane opening with soil to achieve a bowl-shaped overall shape that is low in the middle and high around the edges. Therefore, this invention proposes a well and pit filling and topdressing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A well filling and topdressing device includes a connecting column, a filling mechanism A for filling the well is provided at the bottom of the connecting column, a filling mechanism B for filling the membrane opening and a topdressing mechanism for quantitative topdressing are provided on the outside of the connecting column;

[0008] The sealing mechanism A includes four inclined gathering rods hinged to the bottom of the connecting column and symmetrical about the axis. An L-shaped connecting rod is fixedly connected to the end of each of the four inclined gathering rods away from the connecting column. A sealing insert is fixedly connected to the end of each L-shaped connecting rod away from the inclined gathering rod.

[0009] The sealing mechanism A further includes a drive cylinder slidably connected to the outside of the connecting column and a short connecting rod fixedly connected to the bottom of the connecting column. Four axially symmetrical return springs are fixedly connected to the outside of the short connecting rod, and the ends of the four return springs away from the short connecting rod are respectively fixedly connected to the inside of the four inclined gathering rods.

[0010] The above technical solution further includes:

[0011] The drive cylinder is used to gather the four inclined gathering rods, and a foot pedal is fixedly connected to the outside of the drive cylinder.

[0012] By pressing down on the foot pedal, the drive cylinder can bring together the four inclined gathering rods. When the four inclined gathering rods are fully gathered, the gap between the vertical rods of the four L-shaped connecting rods is sufficient for the tobacco leaves of the tobacco seedling to pass through. The gap between the four sealing inserts is minimal, and at this time the gap is sufficient for the roots and stems of the tobacco seedling to pass through.

[0013] The sealing mechanism B includes a limiting ring fixedly connected to the lower part of the connecting post, an iron ring fixedly connected to the upper part of the connecting post, and a magnetic ring adapted to the iron ring. A connecting ring is fixedly connected to the side of the magnetic ring away from the iron ring, and the connecting ring is slidably connected to the outside of the connecting post. The limiting ring is used to abut against the connecting ring.

[0014] The connecting ring is fixedly connected to two axially symmetrical long connecting rods. The ends of the two long connecting rods away from the connecting ring are fixedly connected to a connecting cylinder. The side of the connecting cylinder away from the long connecting rods has a receiving cavity. The bottom of the connecting cylinder is hinged to two axially symmetrical arc-shaped sealing plates. The inside of the receiving cavity is used to hold soil in the ditch.

[0015] By sliding the connecting ring downwards to disengage the magnet ring from the iron ring and abutting the connecting ring against the limiting ring, the connecting cylinder can be slid to the bottom. Then, stepping on the connecting cylinder will allow the soil in the ditch to enter the receiving cavity.

[0016] The two arc-shaped sealing plates are used to seal the receiving cavity. The receiving cavity is provided with a control component for restricting the rotation of the two arc-shaped sealing plates. The control component includes two slide rails fixedly connected to the inner wall of the receiving cavity and symmetrical about the axis. Each of the two slide rails is slidably connected to a limit block. The two limit blocks are arc-shaped on the side near the ground and have a certain weight. In the initial state, the two limit blocks abut against the inner side of the two arc-shaped sealing plates.

[0017] When the connecting cylinder is stepped on to allow the soil in the ditch to enter the cavity, the soil will push the two limiting blocks upwards and separate them from the inside of the two arc-shaped sealing plates.

[0018] The control assembly also includes guide wheels that are rotatably connected to the inner wall of the receiving cavity and are axially symmetrical. Each of the two guide wheels is provided with a connecting rope. One end of each of the two connecting ropes is fixedly connected to the inner side of the two arc-shaped sealing plates, and the other end of each of the two connecting ropes passes around the two guide wheels and extends to the outside of the connecting cylinder. The top of the connecting cylinder is provided with two through holes for the two connecting ropes to pass through.

[0019] The control assembly also includes two damping sleeves movably connected to the two long connecting rods, and a connecting ring fixedly connected to the two connecting ropes is fixedly connected between the two damping sleeves.

[0020] When the connecting cylinder is pressed down to a certain depth, the two connecting ropes can be moved to close the two arc-shaped sealing plates by sliding the connecting ring upwards, preventing the soil inside the cavity from falling out when the connecting column is lifted.

[0021] The topdressing mechanism includes a quantitative topdressing water gun movably connected to the outside of the connecting column. The external of the quantitative topdressing water gun is fixedly connected to a connecting pipe that is fixedly connected to the backpack fertilizer box. The limiting ring, the iron ring, and the magnet ring are all provided with damping grooves on their external surfaces, and the quantitative topdressing water gun can slide up and down inside the damping grooves.

[0022] The present invention has the following beneficial effects:

[0023] 1. In this invention, by holding the connecting column, the four sealing inserts are aligned directly above the tobacco seedlings. Then, the connecting column is pressed down to insert the four sealing inserts into the soil around the well. Then, the foot pedal is pressed down to make the drive cylinder abut against the four inclined gathering rods. The four inclined gathering rods, abutted by the drive cylinder, will cause the four L-shaped connecting rods and the four sealing inserts to gather together. The gathering of the four sealing inserts can gather the soil around the well between the well and the roots of the tobacco seedlings, thereby achieving a good sealing effect in the well.

[0024] 2. In this invention, the connecting ring is slid downwards to make it abut against the limiting ring. Then, the connecting cylinder is stepped down to make it and the two arc-shaped sealing plates at its bottom enter the soil of the ditch. After the connecting cylinder is stepped down to a certain depth, the connecting ring is slid upwards to make the two connecting ropes drive the two arc-shaped sealing plates to close. Then, without releasing the connecting ring, the connecting cylinder is aligned with the top of the tobacco seedling. Releasing the connecting ring will allow the soil inside the receiving cavity to fall between the outer ring of the well and the outer ring of the membrane opening, thus achieving the effect of sealing the membrane opening, so that the overall shape is a bowl shape with a low center and high sides.

[0025] 3. In this invention, the bottom of the quantitative fertilizer water gun is lowered into the soil to the left of the largest tobacco leaf of the tobacco seedling by sliding down the quantitative fertilizer water gun. Then, the quantitative switch on the quantitative fertilizer water gun is turned on to allow a quantitative amount of water-soluble fertilizer to enter the soil. Then, the quantitative fertilizer water gun is taken out and fertilizer is applied to the soil to the right of the largest tobacco leaf of the tobacco seedling to complete the fertilizer application. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a well filling and topdressing device proposed in this invention;

[0027] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0028] Figure 3 This is a schematic diagram of the first part of the structure of a well filling and topdressing device proposed in this invention;

[0029] Figure 4 This is a schematic diagram of the second part of the structure of a well filling and topdressing device proposed in this invention;

[0030] Figure 5 This is a cross-sectional structural diagram of the connecting cylinder in this invention;

[0031] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point B;

[0032] Figure 7 for Figure 5Enlarged schematic diagram of the structure at point C;

[0033] Figure 8 This is a front view schematic diagram of a well filling and topdressing device proposed in this invention.

[0034] In the diagram: 1. Connecting column; 2. Sealing mechanism A; 21. Inclined gathering rod; 22. L-shaped connecting rod; 23. Sealing insert; 24. Drive cylinder; 25. Short connecting rod; 26. Return spring; 27. Foot pedal; 3. Sealing mechanism B; 31. Limiting ring; 32. Iron ring; 33. Magnet ring; 34. Connecting ring; 35. Long connecting rod; 36. Connecting cylinder; 37. Receiving cavity; 38. Arc-shaped sealing plate; 39. Control component; 391. Slide rail; 392. Limiting block; 393. Guide wheel; 394. Connecting rope; 395. Damping sleeve; 396. Connecting ring; 4. Topdressing mechanism; 41. Quantitative topdressing water gun; 42. Backpack fertilizer box; 43. Connecting pipe. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] like Figure 1-3 and Figure 8 As shown, the present invention proposes a well filling and topdressing device, which includes a connecting column 1, a handle fixedly connected to the top of the connecting column 1, a filling mechanism A2 for filling the well and cellar provided at the bottom of the connecting column 1, a filling mechanism B3 for filling the membrane opening and a topdressing mechanism 4 for quantitative topdressing provided on the outside of the connecting column 1.

[0038] The sealing mechanism A2 includes four inclined gathering rods 21 hinged to the bottom of the connecting column 1 and symmetrical about the axis. Each of the four inclined gathering rods 21 is fixedly connected to an L-shaped connecting rod 22 at the end away from the connecting column 1. The end of the L-shaped connecting rod 22 away from the inclined gathering rod 21 is fixedly connected to a sealing insert 23. The gap between the four sealing inserts 23 is the largest in the initial state, and the gap is large enough for the tobacco leaves of the tobacco seedling to pass through.

[0039] The sealing mechanism A2 also includes a drive cylinder 24 slidably connected to the outside of the connecting column 1 and a short connecting rod 25 fixedly connected to the bottom of the connecting column 1. The drive cylinder 24 is used to gather four inclined gathering rods 21. A foot pedal 27 is fixedly connected to the outside of the drive cylinder 24. By stepping down on the foot pedal 27, the drive cylinder 24 can gather the four inclined gathering rods 21. When the four inclined gathering rods 21 are fully gathered, the gap between the vertical rods of the four L-shaped connecting rods 22 is sufficient for the tobacco leaves of the tobacco seedling to pass through. The gap between the four sealing inserts 23 is the smallest, and the gap at this time is sufficient for the roots and stems of the tobacco seedling to pass through.

[0040] Four axially symmetrical return springs 26 are fixedly connected to the outer side of the short connecting rod 25. The ends of the four return springs 26 away from the short connecting rod 25 are fixedly connected to the inner side of the four inclined gathering rods 21 respectively. The four return springs 26 are used to assist the four inclined gathering rods 21 in resetting.

[0041] In this embodiment, after the membrane opening is enlarged manually, the connecting column 1 is held so that the four sealing inserts 23 are aligned directly above the tobacco seedlings. Then, the connecting column 11 is pressed down so that the four sealing inserts 23 are inserted into the soil around the well cellar (when the four sealing inserts 23 are fully inserted into the soil, the bottoms of the four L-shaped connecting rods 22 are all in contact with the ground). Then, the connecting column 1 is held and the foot pedal 27 is stepped on so that the drive cylinder 24 is pressed down against the four inclined gathering rods 21. The four inclined gathering rods 21 are pressed down by the drive cylinder 24, which will drive the four L-shaped connecting rods 22 and the four sealing inserts 23 to gather together (during the process of the four inclined gathering rods 21 gathering together, the four return springs 26 are all compressed). The gathering of the four sealing inserts 23 can gather the soil around the well cellar between the well cellar and the roots of the tobacco seedlings, thereby achieving a good well cellar filling effect.

[0042] After the well is filled and sealed, release the foot pedal 27. The four compressed return springs 26 will immediately assist the four inclined gathering rods 21 in resetting, thereby resetting the four L-shaped connecting rods 22, the four filling inserts 23, the drive cylinder 24 and the foot pedal 27. Then, lift the connecting column 1 upward to separate the device from the tobacco seedling.

[0043] This well-filling and topdressing device inserts four filling inserts 23 into the soil around the well by pressing down the connecting column 1, and then stepping down the foot pedal 27 to bring the four filling inserts 23 together, gathering the soil around the well between the well and the tobacco seedling roots, thus achieving a good well-filling effect.

[0044] Example 2

[0045] like Figure 1-2 and Figure 4-8As shown, based on Embodiment 1, the sealing mechanism B3 includes a limiting ring 31 fixedly connected to the lower part of the connecting column 1, an iron ring 32 fixedly connected to the upper part of the connecting column 1, and a magnet ring 33 adapted to the iron ring 32. The limiting ring 31 is used to abut against the connecting ring 34. The side of the magnet ring 33 away from the iron ring 32 is fixedly connected to the connecting ring 34. The connecting ring 34 is slidably connected to the outside of the connecting column 1. Two axially symmetrical long connecting rods 35 are fixedly connected to the outside of the connecting ring 34. A connecting cylinder 36 is fixedly connected to the end of the two long connecting rods 35 away from the connecting ring 34. A receiving cavity 37 is opened on the side of the connecting cylinder 36 away from the long connecting rods 35. The inside of the receiving cavity 37 is used to receive soil in the ditch. Two axially symmetrical arc-shaped sealing plates 38 are hinged to the bottom of the connecting cylinder 36. The two arc-shaped sealing plates 38 are used to seal the receiving cavity 37.

[0046] By sliding the connecting ring 34 downwards to disengage the magnet ring 33 from the iron ring 32, and with the connecting ring 34 abutting against the limiting ring 31, the connecting cylinder 36 can be slid to the bottom. Then, stepping on the connecting cylinder 36 will allow the soil in the ditch to enter the receiving cavity 37.

[0047] The cavity 37 is equipped with a control assembly 39 for restricting the rotation of the two arc-shaped sealing plates 38. The control assembly 39 includes two slide rails 391 that are fixedly connected to the inner wall of the cavity 37 and are axially symmetrical. Limiting blocks 392 are slidably connected inside the two slide rails 391. The side of the two limiting blocks 392 closest to the ground is arc-shaped and has a certain weight. In the initial state, the two limiting blocks 392 abut against the inner side of the two arc-shaped sealing plates 38 respectively.

[0048] When the connecting cylinder 36 is stepped down to allow the soil in the ditch to enter the receiving cavity 37, the soil will push the two limiting blocks 392 upward and disengage them from the inner side of the two arc-shaped sealing plates 38.

[0049] The control assembly 39 also includes guide wheels 393 that are rotatably connected to the inner wall of the receiving cavity 37 and are axially symmetrical. Each of the two guide wheels 393 is provided with a connecting rope 394. One end of each connecting rope 394 is fixedly connected to the inner side of the two arc-shaped sealing plates 38, and the other end of each connecting rope 394 passes around the two guide wheels 393 and extends to the outside of the connecting cylinder 36. The top of the connecting cylinder 36 is provided with two through holes for the two connecting ropes 394 to pass through.

[0050] The control assembly 39 also includes two damping sleeves 395 movably connected to the two long connecting rods 35. A connecting ring 396 fixedly connected to the two connecting ropes 394 is fixedly connected between the two damping sleeves 395. After the connecting cylinder 36 is pressed down to a certain depth, the two connecting ropes 394 can be moved to close the two arc-shaped sealing plates 38 by sliding the connecting ring 396 upward, so as to prevent the soil inside the receiving cavity 37 from falling when the connecting column 1 is lifted.

[0051] In this embodiment, after lifting the connecting column 1 upward, the connecting ring 34 is slid downward to disengage the magnet ring 33 from the iron ring 32. During the downward movement of the connecting ring 34, the connecting ring 34 will drive the connecting cylinder 36, the receiving cavity 37, the two arc-shaped sealing plates 38 and the control component 39 to slide down synchronously through the two long connecting rods 35 (when the connecting cylinder 36 slides down, it will abut against the four inclined gathering rods 21 and gather the four inclined gathering rods 21, the four L-shaped connecting rods 22 and the four filling inserts 23). The connecting ring 34 continues to slide down until it abuts against the limiting ring 31. At this time, the connecting cylinder 36 slides to the outside and below the four L-shaped connecting rods 22.

[0052] Then, the connecting cylinder 36 is placed on the soil of the ditch, and the connecting cylinder 36 is stepped on so that the connecting cylinder 36 and the two arc-shaped sealing plates 38 at its bottom enter the soil of the ditch. As the connecting cylinder 36 is stepped into the soil of the ditch, the soil will gradually enter the interior of the receiving cavity 37 and push the two limiting blocks 392 upward, so that the two limiting blocks 392 no longer abut against the inner side of the two arc-shaped sealing plates 38. At this time, the two limiting blocks 392 lose their left and right limiting effect on the two arc-shaped sealing plates 38.

[0053] After the connecting cylinder 36 is pressed down to a certain depth, slide the connecting ring 396 upwards to make the two connecting ropes 394 drive the two arc-shaped sealing plates 38 to close. Then, without releasing the connecting ring 396, lift the connecting column 1 upwards, align the connecting cylinder 36 directly above the tobacco seedlings, and move the connecting column 1 downwards by one distance. Then release the connecting ring 396. The two arc-shaped sealing plates 38 are opened and reset due to the gravity of the soil inside the receiving cavity 37. The soil inside the receiving cavity 37 falls between the outer ring of the well and the outer ring of the membrane opening, thereby achieving the effect of sealing the membrane opening, so that the overall shape is a bowl shape with a low center and high sides. After the sealing between the outer ring of the well and the outer ring of the membrane opening is completed, lift the connecting column 1 and reset the sealing mechanism B3.

[0054] This well-cellar filling and topdressing device uses the filling mechanism B3 to fill and seal the soil in the low ditch between the outer ring of the well-cellar and the outer ring of the membrane opening, thereby achieving the effect of sealing the membrane opening, which makes the overall shape resemble a bowl with a low center and high edges.

[0055] Example 3

[0056] like Figure 1 , Figure 3 and Figure 8 As shown, based on Embodiment 1 and Embodiment 2, the topdressing mechanism 4 includes a quantitative topdressing water gun 41 movably connected to the outside of the connecting column 1. The limiting ring 31, the iron ring 32 and the magnetic ring 33 are all provided with damping grooves on their outside. The quantitative topdressing water gun 41 can slide up and down inside the damping groove. The outside of the quantitative topdressing water gun 41 is fixedly connected to a connecting pipe 43 that is fixedly connected to the backpack fertilizer box 42. The quantitative topdressing water gun 41 and the backpack fertilizer box 42 are both existing technologies and will not be described in detail here.

[0057] In this embodiment, after the membrane opening is sealed and the sealing mechanism B3 is reset, the quantitative fertilizer water gun 41 is slid down so that the bottom of the quantitative fertilizer water gun 41 enters the soil to the lower left of the largest tobacco leaf of the tobacco seedling. Then, the quantitative switch on the quantitative fertilizer water gun 41 is turned on so that a quantitative amount of water-soluble fertilizer enters the soil. Then, the quantitative fertilizer water gun 41 is taken out and fertilizer is applied to the soil to the lower right of the largest tobacco leaf of the tobacco seedling to complete the fertilizer application.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A well filling and topdressing device, comprising a connecting column (1), characterized in that: The bottom of the connecting column (1) is provided with a sealing mechanism A (2) for sealing the well pit, and the outside of the connecting column (1) is provided with a sealing mechanism B (3) for sealing the membrane opening and a topdressing mechanism (4) for quantitative topdressing. The sealing mechanism A (2) includes four inclined gathering rods (21) hinged to the bottom of the connecting post (1) and axially symmetrical. An L-shaped connecting rod (22) is fixedly connected to the end of each of the four inclined gathering rods (21) away from the connecting post (1). A sealing insert (23) is fixedly connected to the end of each L-shaped connecting rod (22) away from the inclined gathering rod (21). The sealing mechanism A (2) further includes a drive cylinder (24) slidably connected to the outside of the connecting post (1) and a short connecting rod (25) fixedly connected to the bottom of the connecting post (1). Four axially symmetrical return springs (26) are fixedly connected to the outside of the short connecting rod (25). The ends of the four return springs (26) away from the short connecting rod (25) are respectively fixedly connected to the inside of the four inclined gathering rods (21). The sealing mechanism B (3) includes a limiting ring (31) fixedly connected to the lower part of the connecting post (1), an iron ring (32) fixedly connected to the upper part of the connecting post (1), and a magnetic ring (33) adapted to the iron ring (32). A connecting ring (34) is fixedly connected to the side of the magnetic ring (33) away from the iron ring (32). The connecting ring (34) is slidably connected to the outside of the connecting post (1). Two long connecting rods (35) that are axially symmetrical are fixedly connected to the outside of the connecting ring (34). A connecting cylinder (3) is fixedly connected to one end of the two long connecting rods (35) away from the connecting ring (34). 6) The connecting cylinder (36) has a receiving cavity (37) on the side away from the long connecting rod (35). The bottom of the connecting cylinder (36) is hinged with two axially symmetrical arc-shaped sealing plates (38). The two arc-shaped sealing plates (38) are used to seal the receiving cavity (37). The receiving cavity (37) is provided with a control component (39) for restricting the rotation of the two arc-shaped sealing plates (38). The control component (39) includes two slide rails (391) fixedly connected to the inner wall of the receiving cavity (37) and axially symmetrical. The two slide rails (391) are slidably connected with limit blocks (392) inside.

2. The well filling and topdressing device according to claim 1, characterized in that, The drive cylinder (24) is used to gather the four inclined gathering rods (21), and a foot pedal (27) is fixedly connected to the outside of the drive cylinder (24).

3. The well filling and topdressing device according to claim 1, characterized in that, The control assembly (39) further includes a guide wheel (393) rotatably connected to the inner wall of the receiving cavity (37) and axially symmetrical. A connecting rope (394) is provided on the outside of each of the two guide wheels (393). One end of each of the two connecting ropes (394) is fixedly connected to the inner side of each of the two arc-shaped sealing plates (38), and the other end of each of the two connecting ropes (394) passes around the two guide wheels (393) and extends to the outside of the connecting cylinder (36).

4. A well filling and topdressing device according to claim 3, characterized in that, The control assembly (39) further includes two damping sleeves (395) movably connected to the two long connecting rods (35), and a connecting ring (396) fixedly connected to the two connecting ropes (394) is fixedly connected between the two damping sleeves (395).

5. A well filling and topdressing device according to claim 1, characterized in that, The topdressing mechanism (4) includes a quantitative topdressing water gun (41) movably connected to the outside of the connecting column (1), and the outside of the quantitative topdressing water gun (41) is fixedly connected to a connecting pipe (43) that is fixedly connected to the backpack fertilizer box (42).

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