CN113686607A

CN113686607A - Soil sampling and quantitative watering agricultural device based on seedling culture

Info

Publication number: CN113686607A
Application number: CN202110979458.6A
Authority: CN
Inventors: 朱纹萱; 陈颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-11-23

Abstract

The invention discloses an agricultural device for soil sampling and quantitative watering based on seedling culture, and belongs to the technical field of seedling culture. The invention relates to an agricultural device for soil sampling and quantitative watering based on seedling culture, which comprises a hand-push vehicle body, wherein the hand-push vehicle body is used as a carrier, a water tank is fixed on the hand-push vehicle body, a booster water pump connected with the water tank is installed, the booster water pump is connected with a single chip microcomputer to realize remote programming control, the water tank and the booster water pump are connected with the single chip microcomputer in parallel, a soil humidity sensor is connected onto the single chip microcomputer in parallel, the soil humidity sensor is directly inserted into soil to quickly sense the soil dryness degree and feed back the soil dryness degree to the single chip microcomputer, the single chip microcomputer controls the booster water pump to work to irrigate the soil, a soil sampler and the water tank are arranged on the hand-push vehicle body side by side, and the automatic sampling function is realized.

Description

Soil sampling and quantitative watering agricultural device based on seedling culture

Technical Field

The invention relates to the technical field of seedling culture, in particular to an agricultural device for soil sampling and quantitative watering based on seedling culture.

Background

Seedling cultivation requires rational use of watering, fertilizing, ensuring adequate and not necessarily intense illumination and adequate clearance to ensure adequate air flow. The dryness degree and the soil layer distribution state of soil need to be known before the seedling is cultivated and cultivated, and pollutants are detected. Soil collection modes in various fields including agriculture still adopt manual collection and then detection and analysis, and existing soil collection is characterized in that used tools are scattered and various, and the use and carrying are also inconvenient. In the seedling cultivation experiment process, hope can be dedicated to improving the convenient high efficiency of soil sampling, reduce manual operation.

Therefore, the agricultural device for soil sampling and quantitative watering based on seedling culture is designed, so that soil sampling and collection can be automatically completed, the dryness and humidity of soil can be quickly sensed, and watering can be performed in time.

Disclosure of Invention

The invention aims to provide an agricultural device for soil sampling and quantitative watering based on seedling culture, which aims to solve the problems that soil sampling and collection can be automatically completed, the dryness and humidity of soil can be quickly sensed and watering can be timely performed.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an agricultural device that soil property sample and ration watered based on seedling culture, includes the hand truck body, the internal portion of hand truck is fixed with the water tank, the water tank front side is connected with booster pump, booster pump goes out water piping connection has the water spray head, the inside position in water tank one side of hand truck body is provided with soil property humidity transducer, soil property humidity transducer connects in parallel on the singlechip with booster pump, the booster pump front side is equipped with soil property sampler.

Preferably, the soil sampler is including the box that is the rectangle, the box outer end is bilateral symmetry and is equipped with two ear seats, the vertical direction of handcart body top surface is rotated and is equipped with two first threaded rods that pass the ear seat and rather than threaded connection, one of them first threaded rod rear side is equipped with first servo motor, be fixed with pivot A on the first servo motor output shaft, pivot A extends to near first threaded rod and accomplishes the meshing through two perpendicular meshing's bevel gear A and connects, another first threaded rod is connected to on the pivot A through two mutually perpendicular's pivot B and bevel gear B meshing.

Preferably, the inside level of box is equipped with the division board, the inside sampling mechanism who passes the division board that is equipped with of box, the division board below is equipped with around the storage device of sampling mechanism.

Preferably, the sampling mechanism comprises a sampling tube, a guide sliding tube, a second threaded rod and a second servo motor, a limit hole is formed in the middle of the partition plate, the guide sliding tube is fixed above the limit hole and communicated with the limit hole, the second threaded rod is fixed in the middle of the top surface of the sampling tube, the sampling tube is arranged below the limit hole, the second threaded rod upwards sequentially penetrates through the limit hole and the guide sliding tube, extends to the upper part of the guide sliding tube and is in clearance fit with the guide sliding tube, a piston is arranged inside the top end of the guide sliding tube in a sliding manner, a piston rod is arranged at the top of the piston, penetrates through the middle of the second threaded rod, extends to the upper part of the second threaded rod and is in sliding connection with the second threaded rod, an internal threaded tube is rotatably arranged in the middle of the top end of the guide sliding tube, the internal second threaded rod penetrates through the threaded tube and is in threaded connection with the threaded tube, the outer end of the internal second threaded rod is sleeved with a chain wheel A, the second servo motor is fixed on the inner wall of the box body, and is sleeved with a chain wheel B on an output shaft thereof, the chain wheel A and the chain wheel B are connected in a meshed mode through a chain.

Preferably, storage device includes the vertical limiting plate in the division board below, and the limiting plate is located spacing hole rear, the limiting plate front side is bilateral symmetry and is equipped with a plurality of semicircular receivers, and a plurality of receivers of vertical direction pile up the setting, receiver rear end middle part adsorbs there is the sucking disc, the sucking disc rear end is equipped with the bracing piece that passes the limiting plate, the spout has been seted up to the middle part level around the bracing piece to the limiting plate.

Preferably, the position that limiting plate rear side middle part and spout are parallel is equipped with two-way threaded rod, the gear has been cup jointed at two-way threaded rod middle part unthreaded position, the two-way threaded rod left and right sides is the central symmetry setting just to the screw thread direction of rotation of spout position, the bracing piece rear end is fixed with the fixed block, two fixed blocks about two-way threaded rod passes respectively and is connected rather than the meshing, limiting plate rear side middle part is equipped with first slide, first slide bottom be equipped with at the back can with gear engagement's rack, first slide top is the setting of L type structure, first slide top front end is equipped with the second slide that the bottom is the setting of L type structure, the second slide passes the division board and extends to the position at second threaded rod top and rotates through direct rather than the top and is connected.

Compared with the prior art, the invention provides an agricultural device for soil sampling and quantitative watering based on seedling culture, which has the following beneficial effects:

(1) the soil moisture sensor is directly inserted into soil, so that the soil dryness can be quickly sensed and fed back to the singlechip, the singlechip controls the booster water pump to work to irrigate the soil, and the soil sampler and the water tank are arranged on the hand-push vehicle body side by side, so that the automatic sampling function is realized.

(2) The soil sampler provided by the invention is supported by the first threaded rod in the trolley body and is controlled by the first servo motor to finish the up-and-down movement of the box body of the soil sampler, so that the soil sampler is descended to the soil surface to finish the sampling preparation work.

(3) According to the automatic sampling device, the second threaded rod rotates to drive the sampling tube to rotate up and down, the sampling tube rotates and moves down after the second threaded rod is controlled to rotate by the second servo motor, the sampling tube is immersed in soil to finish sampling, the piston in the sampling tube is always positioned at the top of the sampling tube under the extrusion of soil, the second servo motor rotates reversely after sampling is finished, the sampling tube completely rises to the inside of the box body, the piston rod contacts the top of the box body, the second servo motor continues to work, and when the sampling tube gradually enters the guide sliding tube, the piston starts to discharge the collected soil from the sampling tube, so that automatic sampling and collection are realized.

(4) According to the invention, the second threaded rod moves up and down by utilizing the connection relationship between the second sliding plate and the second threaded rod, so that the forward and backward rotation of the bidirectional threaded pipe is controlled; during sampling, the two supporting rods are driven by the two-way threaded pipes to move left and right, the two adjacent storage boxes are separated, after sampling is completed, the two-way threaded pipes rotate reversely when the sampling pipes move upwards to the inside of the guide sliding pipe, the two supporting rods approach to the middle part, combination of the two storage boxes is completed, collected soil is gradually discharged by thrust of the piston in the ascending process of the sampling pipes, different soil samples can be collected according to soil depth layers, the samples are independently stored and collected, and the collection efficiency and the collection effect are improved.

Drawings

FIG. 1 is a schematic view of the overall left side top view configuration of the present invention;

FIG. 2 is a schematic overall right side elevational view of the present invention;

FIG. 3 is a rear view of the soil sampler and related components of the present invention;

FIG. 4 is a schematic diagram of the front cross-sectional view of the soil sampler of the present invention;

FIG. 5 is a schematic front sectional view of the assembly of the soil sampler of the present invention;

FIG. 6 is an enlarged view of the structure at A in FIG. 5 according to the present invention;

FIG. 7 is a rear view of the internal components of the soil sampler of the present invention;

FIG. 8 is a rear side view of the limiting plate of the present invention;

FIG. 9 is an enlarged view of the structure at B in FIG. 8 according to the present invention.

Description of the figure numbers: 1. the cart body is pushed by hand; 2. a water tank; 3. a booster water pump; 4. a water outlet nozzle; 6. a soil sampler; 601. a box body; 602. an ear mount; 603. a first threaded rod; 604. a rotating shaft A; 605. a partition plate; 606. a sampling tube; 607. a guide slide pipe; 608. a second threaded rod; 609. a second servo motor; 610. a limiting hole; 611. a piston; 612. a piston rod; 613. an internally threaded tube; 614. a chain wheel A; 615. a sprocket B; 616. a limiting plate; 617. a storage box; 618. a suction cup; 619. a support bar; 620. a chute; 621. a bidirectional threaded rod; 622. a gear; 623. a fixed block; 624. a first slide plate; 625. a rack; 626. a second slide plate; 627. a first servo motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-3, an agricultural device for soil sampling and quantitative watering based on seedling culture comprises a trolley body 1, a water tank 2 is fixed inside the trolley body 1, a booster water pump 3 is connected to the front side of the water tank 2, a water outlet nozzle 4 is connected to a water outlet pipe of the booster water pump 3, a soil humidity sensor is arranged inside the trolley body 1 on one side of the water tank 2, the soil humidity sensor and the booster water pump 3 are connected in parallel on a single chip microcomputer, and a soil sampler 6 is arranged on the front side of the booster water pump 3.

The invention provides an agricultural device for soil sampling and quantitative watering of seedling culture, which is used for analyzing soil components and nutritive value during seedling culture, detecting soil water content and irrigating, taking a trolley as a carrier, fixing a water tank 2 on the trolley body 1, installing a booster water pump 3 connected with the trolley body, connecting the booster water pump 3 with a single chip microcomputer, realizing remote programming control, simultaneously connecting the booster water pump 3 and the single chip microcomputer in parallel, and further comprising a soil humidity sensor, wherein the soil humidity sensor is directly inserted into soil, so that the soil dryness can be quickly sensed and fed back to the single chip microcomputer, the single chip microcomputer controls the booster water pump 3 to work for soil irrigation, and a soil sampler 6 and the water tank 2 are arranged on the trolley body 1 side by side, thereby realizing the automatic sampling function.

Example 2:

referring to fig. 2-3, the embodiment 1 is different from the above embodiments; the soil sampler 6 comprises a rectangular box body 601, two lug seats 602 are symmetrically arranged at the outer end of the box body 601 in the left-right direction, two first threaded rods 603 penetrating through the lug seats 602 and connected with the lug seats 602 in a threaded manner are arranged in the vertical direction of the top surface of the trolley body 1 in a rotating manner, a first servo motor 627 is arranged on the rear side of one first threaded rod 603, a rotating shaft A604 is fixed on an output shaft of the first servo motor 627, the rotating shaft A604 extends to the position near the first threaded rod 603 and is meshed and connected with the first threaded rod A through two vertically meshed bevel gears A, and the other first threaded rod 603 is meshed and connected with the rotating shaft A604 through two mutually perpendicular rotating shafts B and bevel gears B.

The invention relates to a soil sampler 6, wherein a downward-opening electric door is arranged at a position of a hand-push vehicle body 1, when the soil sampler 6 works, the electric door is automatically opened to enable the soil sampler 6 to descend to the soil surface, in particular, ear seats 602 are symmetrically arranged at the side surface of a box body 601 of the soil sampler 6, a first threaded rod 603 standing on the hand-push vehicle body 1 penetrates through the ear seats 602 to erect the box body 601, therefore, no matter the electric door opens and closes the box body 601 and is fixed, the first threaded rod 603 and the ear seats 602 are in threaded connection, when the first threaded rod 603 rotates, the ear seats 602 drive the box body 601 to move up and down, the first threaded rod 603 is connected to an output shaft of a first servo motor 627 through a rotating shaft A604 and a rotating shaft B by taking a plurality of bevel gears A and B which are vertically meshed with each other as connecting pieces, when the first servo motor 627 works, the first threaded rod 603 is driven to rotate, the up and down movement of the case 601 is further completed.

Example 3:

referring to FIGS. 4-6, the embodiment 1-2 is different therefrom; a partition plate 605 is horizontally arranged in the case 601, a sampling mechanism penetrating through the partition plate 605 is arranged in the case 601, and a storage device surrounding the sampling mechanism is arranged below the partition plate 605.

The sampling mechanism comprises a sampling tube 606, a guide sliding tube 607, a second threaded rod 608 and a second servo motor 609, wherein a limit hole 610 is formed in the middle of a partition plate 605, the guide sliding tube 607 is fixed above and communicated with the limit hole 610, the second threaded rod 608 is fixed in the middle of the top surface of the sampling tube 606, the sampling tube 606 is arranged below the limit hole 610, the second threaded rod 608 sequentially penetrates through the limit hole 610 and the guide sliding tube 607 to extend to the upper part of the limit hole and be in clearance fit with the limit hole, a piston 611 is arranged in the guide sliding tube 607 in a sliding mode inside the top end, a piston rod 612 is arranged on the top of the piston 611, the piston rod 612 penetrates through the middle of the second threaded rod 608 to extend to the upper part of the limit hole and is in sliding connection with the piston, an internal threaded tube 613 is rotatably arranged in the middle of the top end of the guide sliding tube 607, the internal second threaded rod 608 penetrates through the internal threaded tube 613 and is in threaded connection with the internal threaded tube, a sprocket A614 is sleeved at the outer end of the internal second threaded rod 608, a sprocket B615 is sleeved on an output shaft of the second servo motor 609 fixed on the inner wall of the box 601, sprocket A614 is in meshing engagement with sprocket B615.

The invention installs a partition plate 605 in a box body 601, the box body 601 at the position above the partition plate 605 is in a sealed state, the box body 601 at the position below the partition plate 605 is provided with a single door at the front end, the partition plate 605 is provided with a limit hole 610, a sampling tube 606 is arranged on the bottom surface of the box body 601 and extends to the bottom end of the limit hole 610, a communicated guide sliding tube 607 is fixed at the upper end of the limit hole 610, a second threaded rod 608 at the top of the sampling tube 606 upwards passes through the guide sliding tube 607, wherein the height of the guide sliding tube 607 is consistent with the length of the sampling tube 606, the second threaded rod 608 is connected to a second servo motor 609 at the position above the guide sliding tube 607 through the meshing connection of a chain wheel A614 and a chain wheel B615, the second threaded rod 608 and the sampling tube 606 rotate and move up and down by controlling the second servo motor 609, wherein the length of the second threaded rod 608 is longer than the length of the guide sliding tube 607, second threaded rod 608 can thus control sampling tube 606 to be completely submerged in the soil, or to travel up to the interior of guide slide 607.

In the invention, a piston 611 is further arranged at the top end inside the sampling tube 606, the piston 611 can slide up and down inside the sampling tube 606 and is used for taking down a collected sample, wherein a piston rod 612 arranged at the top of the piston 611 penetrates out of the middle of the second threaded rod 608 and is in sliding connection with the second threaded rod 608, and the distance between the top surface of the piston rod 612 and the top surface of the box body 601, which is higher than the second threaded rod 608, is consistent with the length of the sampling tube 606.

In the specific working mode of the sampling mechanism, after the first servo motor 627 is started to enable the box body 601 to descend to the surface of soil, the second servo motor 609 is started to drive the second threaded rod 608 and the sampling tube 606 to rotate and move downwards, sampling is completed when the sampling tube 606 is immersed in the soil, the piston 611 is always positioned at the top of the sampling tube 606 during the process of extruding by soil, and the sampling is completed; the second servo motor 609 rotates reversely, the sampling tube 606 is completely lifted into the box 601 first, the piston rod 612 contacts the top of the box 601, the second servo motor 609 continues to work, and when the sampling tube 606 gradually enters the guide sliding tube 607, the piston 611 starts to discharge the collected soil from the sampling tube 606.

Example 4:

referring to FIGS. 7-9, embodiments 1-3 are different in that; storage device includes vertical limiting plate 616 in division board 605 below, and limiting plate 616 is located spacing hole 610 rear, and limiting plate 616 front side is bilateral symmetry and is equipped with a plurality of semicircular in shape receiver 617, and a plurality of receiver 617 of vertical direction stack up the setting, and the middle part of receiver 617 rear end adsorbs there is sucking disc 618, and sucking disc 618 rear end is equipped with and passes limiting plate 616 bracing piece 619, and limiting plate 616 has seted up spout 620 to the middle part level around bracing piece 619.

The middle of the rear side of the limiting plate 616 is provided with a bidirectional threaded rod 621 parallel to the sliding chute 620, a gear 622 is sleeved at the middle of the bidirectional threaded rod 621 without threads, the left side and the right side of the bidirectional threaded rod 621 are arranged in central symmetry in the thread rotating direction opposite to the sliding chute 620, fixing blocks 623 are fixed at the rear end of the supporting rod 619, the bidirectional threaded rod 621 penetrates through the left fixing block 623 and the right fixing block 623 respectively and is in meshed connection with the two fixing blocks, a first sliding plate 624 is arranged at the middle of the rear side of the limiting plate 616, a rack 625 capable of being meshed with the gear 622 is arranged behind the bottom of the first sliding plate 624, the top of the first sliding plate 624 is arranged in an L-shaped structure, a second sliding plate 626 arranged at the front end of the top of the first sliding plate 624 in an L-shaped structure is arranged, and the second sliding plate 626 penetrates through the dividing plate 605 to extend to the top of the second threaded rod 608 and is directly in rotary connection with the top of the second sliding plate.

The invention provides a containing device for collecting collected soil, and particularly relates to a plurality of storage cups stacked below a separation plate 605, wherein the storage cups are cut from the middle part to form two semicircular containing boxes 617, the left containing box 617 and the right containing box 617 are arranged around a sampling tube 606 in a bilateral symmetry manner, magnetic stripes are arranged on the vertical surfaces of the inner sides of the containing boxes 617, adsorption and combination are realized when the left containing box 617 and the right containing box 617 are close, the plurality of containing boxes 617 are connected with a sucking disc 618 and a supporting rod 619, the bottom end of the separation plate 605 is positioned at a position fixing limiting plate 616 behind a limiting hole 610, the supporting rod 619 penetrates through the limiting plate 616 to support the containing boxes 617, a sliding groove 620 capable of enabling the supporting rod 619 to horizontally slide towards the middle part is formed in the limiting plate 616, and when the bilateral symmetry supporting rod 619 is close to the middle part, two adjacent containing boxes 617 are combined.

In the invention, the left and right ends of a plurality of bidirectional threaded rods 621 arranged at the rear side of a limiting plate 616 are provided with threaded parts which correspond to a left sliding groove 620 and a right sliding groove 620, a fixed block 623 arranged at the rear end of a supporting rod 619 is in threaded connection by the bidirectional threaded rods 621, when the bidirectional threaded rods 621 rotate, the two supporting rods 619 can move in an access or reverse direction, the middle part of each bidirectional threaded rod 621 is sleeved with a gear 622, the rear side of the limiting plate 616 is also provided with a first sliding plate 624 and a second sliding plate 626, wherein the second sliding plate 626 penetrates through a partition plate 605 to be connected to a second threaded rod 608, the second sliding plate 626 slides up and down and is driven by the second threaded rod 608, the first sliding plate 624 and the second sliding plate 626 are arranged in a staggered manner, the top of the first sliding plate 624 and the bottom of the second sliding plate 626 are both in an L-shaped structure, so that hooking driving can be realized, the bottom end of the first sliding plate 624 is provided with a rack 625 which can be meshed with the gear 622, drive first slide 624 at second slide 626 and go upward the setting, rack 625 can be followed and down drives gear 622 in proper order and rotate, and then has realized that left and right sides bracing piece 619 is close to the middle part, accomplishes the incorporation of receiver 617, wherein is connected with the spring between first slide 624 and the box 601, can automatic re-setting after first slide 624 breaks away from second slide 626 pulling force.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a soil property sample and quantitative watering's agricultural device based on seedling culture, includes hand truck body (1), its characterized in that: hand automobile body (1) inside is fixed with water tank (2), water tank (2) front side is connected with booster pump (3), booster pump (3) water piping connection has water outlet spray head (4), hand automobile body (1) inside is provided with soil property humidity transducer in the position of water tank (2) one side, soil property humidity transducer connects in parallel on the singlechip with booster pump (3), booster pump (3) front side is equipped with soil property sampler (6).

2. A seedling culture based soil sampling and quantitative watering agricultural device according to claim 1, wherein: soil property sampler (6) is including being rectangular box (601), box (601) outer end is bilateral symmetry and is equipped with two ear seats (602), the vertical direction of hand-push car body (1) top surface is rotated and is equipped with two and passes ear seat (602) and rather than threaded connection's first threaded rod (603), one of them first threaded rod (603) rear side is equipped with first servo motor (627), be fixed with pivot A (604) on first servo motor (627) output shaft, pivot A (604) extend to near first threaded rod (603) and accomplish the meshing connection through two perpendicular meshing's bevel gear A, another first threaded rod (603) are connected to on pivot A (604) through two mutually perpendicular pivot B and bevel gear B meshing.

3. A seedling culture based soil sampling and quantitative watering agricultural device according to claim 2, wherein: a partition plate (605) is horizontally arranged in the box body (601), a sampling mechanism penetrating through the partition plate (605) is arranged in the box body (601), and a containing device surrounding the sampling mechanism is arranged below the partition plate (605).

4. A seedling culture based soil sampling and quantitative watering agricultural device according to claim 3, wherein: the sampling mechanism comprises a sampling tube (606), a guide sliding tube (607), a second threaded rod (608) and a second servo motor (609), a limit hole (610) is formed in the middle of the separation plate (605), the guide sliding tube (607) is fixed above the limit hole (610) and communicated with the limit hole, the second threaded rod (608) is fixed in the middle of the top surface of the sampling tube (606), the sampling tube (606) is arranged below the limit hole (610), the second threaded rod (608) upwards sequentially penetrates through the limit hole (610) and the guide sliding tube (607) to extend to the upper part of the second threaded rod and be in clearance fit with the second threaded rod, a piston (611) is arranged in the top end of the guide sliding tube (607) in a sliding mode, a piston rod (612) is arranged at the top of the piston (611), the piston rod (612) penetrates through the middle of the second threaded rod (608) to extend to the upper part of the second threaded rod and is in sliding connection with the piston rod, an internal threaded tube (613) is rotatably arranged in the middle of the top end of the guide sliding tube (607), the inner second threaded rod (608) penetrates through the inner threaded pipe (613) and is in threaded connection with the inner threaded pipe, a chain wheel A (614) is sleeved at the outer end of the inner second threaded rod (608), the second servo motor (609) is fixed on the inner wall of the box body (601), a chain wheel B (615) is sleeved on an output shaft of the inner second threaded rod, and the chain wheel A (614) is meshed with the chain wheel B (615) through a chain.

5. A seedling culture based soil sampling and quantitative watering agricultural device according to claim 4, wherein: storage device includes vertical limiting plate (616) in division board (605) below, limiting plate (616) are located spacing hole (610) rear, limiting plate (616) front side is bilateral symmetry and is equipped with a plurality of semicircular in shape receiver (617), and a plurality of receiver (617) of vertical direction stack the setting, receiver (617) rear end middle part adsorbs there is sucking disc (618), sucking disc (618) rear end is equipped with bracing piece (619) that passes limiting plate (616), spout (620) have been seted up to the middle part level to limiting plate (616) around bracing piece (619).

6. A seedling culture based soil sampling and quantitative watering agricultural device according to claim 5, wherein: limiting plate (616) rear side middle part is equipped with two-way threaded rod (621) with the position that spout (620) is parallel, gear (622) have been cup jointed to two-way threaded rod (621) middle part unthreaded position, two-way threaded rod (621) left and right sides is just to the screw thread direction of rotation that spout (620) position sets up, bracing piece (619) rear end is fixed with fixed block (623), two fixed block (623) about passing respectively and rather than the meshing are connected, limiting plate (616) rear side middle part is equipped with first slide (624), first slide (624) bottom is equipped with rack (625) that can mesh with gear (622) at the back, first slide (624) top is L type structure setting, first slide (624) top front end is equipped with second slide (626) that the bottom is L type structure setting, second slide (626) pass division board (605) and extend to the position and the second threaded rod (608) top and the position of second threaded rod (608) top and the setting By direct rotational connection with its top.