A soil condition automatic monitoring device

Abstract

The invention discloses an automatic soil condition monitoring device, which comprises: a frame placed on the ground, a carrier plate, a drilling positioning unit, a side bracket and a leaching mechanism, wherein two guide rods are vertically and symmetrically connected to the frame, the carrier plate is slidably connected to the guide rods, and a drill bit is installed below the drilling positioning unit; the leaching mechanism is coaxially installed on the drilling positioning unit and is located above the drill bit; the side bracket is vertically fixed to one side of the frame, a main liquid pipe is arranged on the side bracket, one end of the main liquid pipe is connected to the leaching mechanism, and a liquid storage tank and a liquid delivery tank are symmetrically installed on the side bracket; prefabricated leaching solution is stored in the liquid delivery tank; the invention mainly adopts the leaching mechanism to perform multi-point leaching monitoring on the soil, so as to realize real-time monitoring of microbial changes and nutrient distribution in the soil by comparing the components of the leaching solution in different time periods.

Description

Technical Field

[0001] The invention belongs to the technical field of soil monitoring equipment, and in particular is an automatic soil condition monitoring device. Background Art

[0002] Automatic monitoring of soil conditions is an important part of modern agriculture, environmental science, and land resource management. Real-time and continuous monitoring of soil parameters can provide important data support for agricultural production, environmental protection, and scientific research. Common soil monitoring equipment such as moisture sensors and temperature sensors can be used to monitor soil moisture and temperature, but cannot obtain soil nutrients, microbial changes, etc. Changes in soil microbial communities are crucial to soil health and crop growth, but traditional physical sensors cannot capture these dynamics. Soil leaching solutions can directly reflect the dissolved concentration of these nutrients in the soil, and can also reflect the acidity and alkalinity of the soil, helping to assess whether the soil is suitable for the growth of specific crops.

[0003] In the prior art, such as the invention patent with publication number CN107014645A, during the leaching process, the leaching solution flows into the operating pipe well through the adsorption and filtration effects of the porous small leaching tube and the porous large leaching tube, and the leaching solution is transported to the collecting bottle by a micro water pump through the liquid suction tube, so that the dynamic changes of the hydrology inside the soil can be intuitively fed back through the leaching solution monitoring; however, since the position of the monitoring point is fixed, it is impossible to reflect the differences in different soil layers and spatial positions in the entire monitoring area, and it is impossible to achieve multi-point monitoring, resulting in the leaching solution sample being unrepresentative; at the same time, the pipe burying process of this method is complicated, and it is difficult to flexibly adjust the monitoring strategy according to research needs or environmental changes.

[0004] Therefore, it is necessary to provide a soil condition automatic monitoring device to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: an automatic soil condition monitoring device, comprising: a frame placed on the ground, a carrier plate, a drilling positioning unit, a side bracket and a leaching mechanism, the frame is vertically and symmetrically connected to two guide rods, the carrier plate is slidably connected to the guide rods, the drilling positioning unit is vertically rotatably connected to the carrier plate, and a drill bit is installed below the drilling positioning unit;

[0006] The leaching mechanism is coaxially mounted on the drilling positioning unit and is located above the drill bit; the side bracket is vertically fixed to one side of the frame, a main liquid pipe is arranged on the side bracket, one end of the main liquid pipe is connected to the leaching mechanism, and a liquid storage tank and a liquid delivery tank are symmetrically mounted on the side bracket, the liquid storage tank and the liquid delivery tank are connected to the other end of the main liquid pipe through a three-way valve; the liquid delivery tank stores a prefabricated leaching solution;

[0007] The leaching mechanism comprises:

[0008] A guide sleeve is coaxially fixed outside the drilling positioning unit, and a plurality of connecting frames are hingedly connected to the outer circumference of the guide sleeve;

[0009] The leaching pipes are arranged one by one corresponding to each of the connecting frames, and the leaching pipes are fixed parallel to the connecting frames;

[0010] An axle tube, the center of which is slidably connected in the drilling positioning unit, a connecting ring is fixed outside the axle tube, and the connecting ring is connected to each of the connecting frames through a plurality of ribs;

[0011] The sealing tube is centrally fixed in the drilling positioning unit, the sliding sealing sleeve at the lower end of the shaft tube is arranged outside the sealing tube, a hose is connected to the side wall of the sealing tube, and one end of the hose is connected to the leaching tube.

[0012] Further, preferably, the leaching tube comprises:

[0013] A pipe joint is fixed parallel to the lower part of the connecting frame, a thin pipe is slidably connected to the center of the pipe joint, and an outer pipe sleeve is coaxially provided outside the thin pipe;

[0014] A guide cavity is arranged in the pipe joint, and a plurality of guide holes are distributed circumferentially on one side of the guide cavity;

[0015] The ring chambers are arranged and distributed along the axial direction of the outer sleeve, and the adjacent ring chambers are connected through the inner flow channel. A plurality of seepage grooves are distributed circumferentially on the side wall of the outer sleeve, and the ring chambers are connected with the seepage grooves through side holes;

[0016] A straight hole is provided on the outer pipe sleeve and is connected with the seepage groove, and the other end of the straight hole is connected with the capillary tube.

[0017] Further, as a preference, a spacer ring is fixed outside the capillary tube, a sealing ring is fixed inside the guide cavity, the spacer ring and the sealing ring are slidably assembled, and a sealing valve is fixed in the center of the guide cavity, one end of the sealing valve slides into the capillary tube, and a ball groove is provided inside the capillary tube;

[0018] A limit spring is connected between the outer pipe sleeve and the pipe joint.

[0019] Furthermore, preferably, the cross section of the seepage groove is an oblique slot hole structure.

[0020] Further, preferably, a soil-breaking cone head is fixed to one end of the leaching pipe away from the guide sleeve.

[0021] Further, as a preference, the leaching mechanism further comprises:

[0022] A shaft cylinder is vertically mounted on the carrier plate, the upper end of the shaft tube is slidably connected in the shaft cylinder, an inner piston is slidably connected in the shaft cylinder, and the shaft tube is rotatably connected to the inner piston;

[0023] A support spring is arranged in the shaft cylinder and below the inner piston; a pneumatic hole is opened on the side wall of the shaft cylinder, and a pneumatic tube is connected to the outside of the pneumatic hole;

[0024] The upper connecting cylinder is coaxially fixed above the shaft cylinder, the main liquid pipe is sealingly connected above the upper connecting cylinder, a liquid isolation sleeve is cocentrically fixed in the upper connecting cylinder, the shaft tube is sealingly rotatably connected to the liquid isolation sleeve, and the shaft tube slides axially along the liquid isolation sleeve.

[0025] Further, preferably, the drilling positioning unit comprises:

[0026] A rotating sleeve is vertically rotatably connected to the carrier plate, and a driving wheel is disposed on the outer sleeve of the rotating sleeve;

[0027] The drill pipe is coaxially connected to the lower part of the rotary sleeve;

[0028] A driving motor is vertically mounted on the carrier plate, and an output end of the driving motor is connected to the driving wheel through a transmission chain for transmission;

[0029] A threaded rod is vertically rotatably connected to the frame, and the carrier plate is threadedly connected to the threaded rod;

[0030] The control motor is fixed on the frame, and the output end of the control motor is connected with the threaded rod for transmission through the meshing action of gears.

[0031] Further, preferably, the limit spring causes the spacer ring and the sealing ring to be sealed against each other under the action of the spring tension, and at this time the sealing valve is separated from the ball groove in the capillary tube.

[0032] Furthermore, preferably, the liquid delivery tank adopts a steady liquid delivery or a pulse liquid delivery method.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The leaching mechanism used on the drilling positioning unit in the present invention can penetrate into different positions of the soil with the drilling positioning unit, so that the leaching mechanism can perform multi-point leaching monitoring on the soil, which can achieve soil monitoring effects in a larger range. At the same time, when encountering special circumstances (such as soil structure changes, pollution source migration, etc.), the monitoring strategy can be quickly adjusted to ensure the timeliness and accuracy of the data; the multiple leaching tubes used therein can be plugged into the soil layer, and the leaching solution is transported to each leaching tube through the liquid delivery tank. When the leaching solution soaks the soil through the seepage groove on the surface of the leaching tube, it flows back into the leaching tube and is collected by the liquid storage tank, which reduces the risk of contamination in the transmission path and ensures the purity and authenticity of the sample, thereby comparing the composition of the leaching solution in different time periods to achieve real-time monitoring of microbial changes and nutrient distribution in the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the leaching mechanism in the present invention;

[0037] Figure 3 It is a schematic diagram of the cross-sectional structure of the leaching tube in the present invention;

[0038] Figure 4 It is a schematic diagram of the three-dimensional structure of the elution tube in the present invention;

[0039] Figure 5 It is a structural schematic diagram of the center shaft cylinder of the present invention;

[0040] Figure 6 It is a schematic diagram of the local structure of the drilling positioning unit in the present invention;

[0041] In the figure: 1, frame; 11, carrier plate; 12, side bracket; 13, guide rod; 14, main liquid pipe; 15, liquid feeding tank; 2, drilling positioning unit; 21, drill bit; 22, rotating sleeve; 23, drill rod; 24, driving wheel; 25, driving motor; 26, threaded rod; 27, control motor; 3, leaching mechanism; 31, guide sleeve; 32, connecting frame; 33, shaft tube; 34, chain; 35, rib rod; 36. Sealing tube; 37. Hose; 38. Soil-breaking cone head; 4. Leaching tube; 41. Pipe joint; 42. Capillary; 43. Outer tube sleeve; 44. Guide cavity; 45. Guide hole; 46. Ring chamber; 47. Seepage groove; 48. Straight hole; 49. Limit spring; 5. Spacer ring; 51. Sealing ring; 52. Sealing valve; 6. Shaft cylinder; 61. Inner piston; 62. Air pressure hole; 63. Upper connecting cylinder; 64. Liquid-isolating sleeve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] See also Figure 1 - Figure 6 In an embodiment of the present invention, a soil condition automatic monitoring device includes: a frame 1 placed on the ground, a carrier plate 11, a drilling positioning unit 2, a side bracket 12 and a leaching mechanism 3, the frame 1 is vertically and symmetrically connected to two guide rods 13, the carrier plate 11 is slidably connected to the guide rods 13, the drilling positioning unit 2 is vertically and rotatably connected to the carrier plate 11, and a drill bit 21 is installed below the drilling positioning unit 2 to facilitate drilling into the soil;

[0045] The leaching mechanism 3 is coaxially mounted on the drilling positioning unit 2 and is located above the drill bit 21; the side bracket 12 is vertically fixed on one side of the frame 1, and a main liquid pipe 14 is arranged on the side bracket 12, one end of the main liquid pipe 14 is connected to the leaching mechanism 3, and a liquid storage tank and a liquid delivery tank 15 are symmetrically mounted on the side bracket 12, and the liquid storage tank and the liquid delivery tank 15 are connected to the other end of the main liquid pipe 14 through a three-way valve; the liquid delivery tank 15 stores a prefabricated leaching solution; the prefabricated leaching solution in the liquid delivery tank 15 can be transported to the leaching mechanism 3 through the main liquid pipe 14 (using a liquid pump device), the prefabricated leaching solution fully flows through the soil layer and flows back to the leaching mechanism 3, and then the leaching solution is extracted and collected by the liquid storage tank through the main liquid pipe 14, thereby realizing the purpose of efficient and accurate multi-point monitoring of the regional soil by detecting the leaching solution in the liquid storage tank.

[0046] The leaching mechanism 3 includes:

[0047] A guide sleeve 31 is coaxially fixed outside the drilling positioning unit 2, and a plurality of connecting frames 32 are hingedly connected to the outer circumference of the guide sleeve 31;

[0048] The leaching pipes 4 are arranged one by one corresponding to each connecting frame 32, and the leaching pipes 4 are fixed parallel to the connecting frame 32;

[0049] The shaft tube 33 is centrally connected in a sliding manner in the drilling positioning unit 2. A link 34 is fixed outside the shaft tube 33. The link 34 is connected to each connecting frame 32 through a plurality of ribs 35. Thus, the leaching tube 4 on the connecting frame 32 is pushed to expand or retract through each rib 35 during the axial displacement adjustment of the shaft tube 33. A contraction groove can be provided on the surface of the drill rod 23 in the drilling positioning unit 2. When the leaching tube 4 is retracted, it can be embedded in the contraction groove in parallel, and the maximum expansion angle of the leaching tube 4 is 85°.

[0050] The sealing tube 36 is centrally fixed in the drilling positioning unit 2, and the sliding sealing sleeve at the lower end of the shaft tube 33 is arranged outside the sealing tube 36. A hose 37 is connected to the side wall of the sealing tube 36, and one end of the hose 37 is connected to the leaching tube 4. That is to say, the leaching solution can enter the sealing tube 36 through the shaft tube 33, and then be transported to the leaching tube 4 by each hose 37 on the sealing tube 36.

[0051] In this embodiment, the leaching tube 4 includes:

[0052] The pipe joint 41 is fixed parallel to the lower part of the connecting frame 32. A thin tube 42 is slidably connected to the center of the pipe joint 41. An outer pipe sleeve 43 is coaxially sleeved outside the thin tube 42. The pipe joint 41 is connected and fixed to the connecting frame 32.

[0053] A guide cavity 44 is disposed in the pipe joint 41, and a plurality of guide holes 45 are distributed circumferentially on one side of the guide cavity 44;

[0054] The ring chambers 46 are arranged and distributed along the axial direction of the outer sleeve 43. Adjacent ring chambers 46 are connected through inner flow channels (not shown in the figure). A plurality of seepage grooves 47 are distributed circumferentially on the side wall of the outer sleeve 43. The ring chambers 46 are connected to the seepage grooves 47 through side holes.

[0055] A straight hole 48 is provided on the outer pipe sleeve 43 and connected to the seepage groove 47, and the other end of the straight hole 48 is connected to the capillary 42. Specifically, the leachate enters the guide cavity 44 of the pipe joint 41, passes through the guide hole 45 and enters the annular bin 46 at the first position, and then flows into the remaining annular bins 46 through the inner flow channel. When the leachate in each annular bin 46 flows fully, it flows into the seepage groove 47 through the side hole, so that the soil at the position of the seepage groove 47 can be infiltrated. The infiltrated leachate flows into the capillary 42 through the straight hole 48 in the seepage groove 47 for centralized collection.

[0056] As a preferred embodiment, a spacer ring 5 is fixed outside the capillary tube 42, a sealing ring 51 is fixed inside the guide cavity 44, the spacer ring 5 and the sealing ring 51 are slidably assembled, and a sealing valve 52 is fixed in the center of the guide cavity 44, one end of the sealing valve 52 slides into the capillary tube 42, and a ball groove is provided in the capillary tube 42; the sealing valve 52 can slide and seal with the ball groove in the capillary tube 42;

[0057] A limit spring 49 is connected between the outer pipe sleeve 43 and the pipe joint 41 .

[0058] In this embodiment, the cross-section of the seepage trough 47 is an inclined slot structure, which makes it convenient for the leachate to soak the soil while flowing along the seepage trough 47. In order to avoid the phenomenon of soil residue in the seepage trough 47 causing hole blockage, a biological membrane with a suitable mesh size can be used to cover and protect the outside of the seepage trough 47 according to the soil mud.

[0059] In this embodiment, a soil-breaking cone head 38 is fixed to one end of the leaching pipe 4 away from the guide sleeve 31 to facilitate the leaching pipe 4 to break through the soil and drill into.

[0060] In this embodiment, the leaching mechanism 3 further includes:

[0061] The shaft cylinder 6 is vertically mounted on the carrier plate 11. The upper end of the shaft tube 33 is slidably connected in the shaft cylinder 6. An inner piston 61 is slidably connected in the shaft cylinder 6. The shaft tube 33 is rotatably connected to the inner piston 61.

[0062] The support spring is arranged in the shaft cylinder 6 and below the inner piston 61; a gas pressure hole 62 is opened on the side wall of the shaft cylinder 6, and a gas pressure pipe (not shown in the figure) is connected to the outside of the gas pressure hole 62, so that the gas pressure in the shaft cylinder 6 is adjusted by the gas pressure pipe to drive the inner piston 61 to perform vertical sliding adjustment, and at this time, the shaft tube 33 on the inner piston 61 can be synchronously displaced and adjusted;

[0063] The upper connecting cylinder 63 is coaxially fixed above the shaft cylinder 6, and the main liquid pipe 14 is sealingly connected above the upper connecting cylinder 63. A liquid isolation sleeve 64 is fixed cocentrically in the upper connecting cylinder 63. The shaft tube 33 is sealed and rotatably connected to the liquid isolation sleeve 64, and the shaft tube 33 slides axially along the liquid isolation sleeve 64. The liquid isolation sleeve 64 has a high sealing and leak-proof effect to prevent the leakage solution from overflowing.

[0064] As a preferred embodiment, the drilling positioning unit 2 includes:

[0065] A rotating sleeve 22 is vertically rotatably connected to the carrier plate 11, and a driving wheel 24 is disposed on the outer cover of the rotating sleeve 22;

[0066] The drill rod 23 is coaxially connected to the lower side of the rotating sleeve 22;

[0067] The drive motor 25 is vertically mounted on the carrier plate 11, and the output end of the drive motor 25 is connected to the drive wheel 24 through a transmission chain; the drive motor 25 is used to provide drilling driving force to the drill rod 23;

[0068] The threaded rod 26 is vertically rotatably connected to the frame 1, and the carrier plate 11 is threadedly connected to the threaded rod 26;

[0069] The control motor 27 is fixed on the frame 1, and the output end of the control motor 27 is connected to the threaded rod 26 through gear meshing. Specifically, when the leaching tube 4 is breaking the ground and drilling, the control motor 27 is preferably used to drive the threaded rod 26 to rotate. The carrier plate 11 on the threaded rod 26 can slide vertically downward through the thread meshing action. At this time, the leaching mechanism 3 on the drill rod 23 can be displaced to the corresponding monitoring point position (the ground-breaking cone head 38 on the leaching tube 4 is at the drilling point), and the air pressure is adjusted by the air pressure tube outside the shaft cylinder 6 to drive the shaft tube 33 to slide upward. At this time, each leaching tube 4 is gradually unfolded. At the same time, the control motor 27 drives the threaded rod 26 to rotate synchronously again, so that the drill rod 23 slides upward gradually, thereby keeping the drilling point position of each leaching tube 4 unchanged, and the leaching tube 4 gradually penetrates into the soil layer; this can effectively avoid the leaching tube 4 from having a large gap with the soil during the expansion drilling, resulting in excessive loss of subsequent leaching solution.

[0070] In this embodiment, the limit spring 49 causes the spacer ring 5 to be sealed against the sealing ring 51 under the action of the spring tension, and the sealing valve 52 is separated from the ball groove in the capillary 42. That is to say, when the leachate is sent into the leachate tube 4, the leachate is quickly filled in the guide cavity 44. At this time, it drives the capillary 42 and the outer tube sleeve 43 to slide axially under the hydraulic pressure, and the limit spring 49 is gradually stretched, so that the spacer ring 5 is separated from the sealing ring 51, and the sealing valve 52 is in sealing contact with the ball groove in the capillary 42, and the leachate enters the ring chamber 46 through the guide hole 45, and the leachate gradually flows back to the capillary 42 during the flow; and during the extraction of the leachate, the limit spring 49 is elastically reset, and the spacer ring 5 is sealed against the sealing ring 51, and the sealing valve 52 is separated from the ball groove in the capillary 42, so that the capillary 42 is in an open state, and the leachate completes the reflux extraction.

[0071] In this embodiment, the liquid delivery tank 15 adopts a steady liquid delivery or a pulse liquid delivery mode, wherein the liquid delivery tank 15 can flexibly change the flow position of the seepage groove 47 in the pulse liquid delivery, thereby increasing the contact and infiltration effect between the leaching solution and the soil, and on the other hand, it can expand the gap between the leaching pipe 4 and the soil layer to a certain extent, thereby ensuring that the leaching solution flows fully and further improving the infiltration effect. The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes according to the technical scheme and its inventive concept of the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A soil condition automatic monitoring device, comprising a frame (1) placed on the ground, a carrier plate (11), a drilling positioning unit (2), a side bracket (12) and a leaching mechanism (3), characterized in that: Two guide rods (13) are vertically and symmetrically connected to the frame (1), the carrier plate (11) is slidably connected to the guide rods (13), the drilling positioning unit (2) is vertically rotatably connected to the carrier plate (11), and a drill bit (21) is installed below the drilling positioning unit (2); The leaching mechanism (3) is coaxially mounted on the drilling positioning unit (2) and is located above the drill bit (21); the side bracket (12) is vertically fixed to one side of the frame (1); a main liquid pipe (14) is arranged on the side bracket (12); one end of the main liquid pipe (14) is connected to the leaching mechanism (3); and a liquid storage tank and a liquid delivery tank (15) are symmetrically mounted on the side bracket (12); the liquid storage tank and the liquid delivery tank (15) are connected to the other end of the main liquid pipe (14) through a three-way valve; the liquid delivery tank (15) stores a prefabricated leaching solution; The leaching mechanism (3) includes: A guide sleeve (31) is coaxially fixed outside the drilling positioning unit (2), and a plurality of connecting frames (32) are hingedly connected to the outer circumference of the guide sleeve (31); The leaching pipes (4) are arranged one by one corresponding to each connecting frame (32), and the leaching pipes (4) are all fixed in parallel with the connecting frame (32); The shaft tube (33) is centrally slidably connected in the drilling positioning unit (2), a connecting ring (34) is fixed outside the shaft tube (33), and the connecting ring (34) is connected to each connecting frame (32) through a plurality of ribs (35); The sealing tube (36) is centrally fixed in the drilling positioning unit (2), the lower end sliding sealing sleeve of the shaft tube (33) is arranged outside the sealing tube (36), the side wall of the sealing tube (36) is connected with a hose (37), and one end of the hose (37) is connected to the leaching tube (4); The leaching tube (4) comprises: The pipe joint (41) is fixed parallel to the lower part of the connecting frame (32), a thin pipe (42) is slidably connected to the center of the pipe joint (41), and an outer pipe sleeve (43) is coaxially sleeved outside the thin pipe (42); A guide cavity (44) is arranged in the pipe joint (41), and a plurality of guide holes (45) are distributed around one side of the guide cavity (44); The ring chambers (46) are arranged and distributed along the axial direction of the outer tube sleeve (43), and the adjacent ring chambers (46) are connected to each other through the inner flow channel. A plurality of seepage grooves (47) are distributed circumferentially on the side wall of the outer tube sleeve (43), and the ring chambers (46) are connected to the seepage grooves (47) through side holes; A straight hole (48) is formed on the outer tube sleeve (43) and is connected to the seepage groove (47). The other end of the straight hole (48) is connected to the capillary tube (42).

2. The soil condition automatic monitoring device according to claim 1, characterized in that: A spacer ring (5) is fixed outside the capillary tube (42), a sealing ring (51) is fixed inside the guide cavity (44), the spacer ring (5) and the sealing ring (51) are slidably assembled, and a sealing valve (52) is fixed at the center of the guide cavity (44), one end of the sealing valve (52) slides into the capillary tube (42), and a ball groove is provided inside the capillary tube (42); A limit spring (49) is connected between the outer pipe sleeve (43) and the pipe joint (41).

3. The soil condition automatic monitoring device according to claim 1, characterized in that: The cross section of the seepage groove (47) is an oblique slot hole structure.

4. The soil condition automatic monitoring device according to claim 1, characterized in that: A soil breaking cone head (38) is fixed to one end of the leaching pipe (4) away from the guide sleeve (31).

5. The soil condition automatic monitoring device according to claim 1, characterized in that: The leaching mechanism (3) also includes: The shaft cylinder (6) is vertically mounted on the carrier plate (11), the upper end of the shaft tube (33) is slidably connected in the shaft cylinder (6), an inner piston (61) is slidably connected in the shaft cylinder (6), and the shaft tube (33) and the inner piston (61) are rotatably connected; A support spring is arranged in the shaft cylinder (6) and below the inner piston (61); a pneumatic hole (62) is provided on the side wall of the shaft cylinder (6), and a pneumatic tube is connected to the outside of the pneumatic hole (62); The upper connecting cylinder (63) is coaxially fixed above the shaft cylinder (6), the main liquid pipe (14) is sealingly connected above the upper connecting cylinder (63), a liquid isolating sleeve (64) is coaxially fixed inside the upper connecting cylinder (63), the shaft tube (33) is sealingly rotatably connected to the liquid isolating sleeve (64), and the shaft tube (33) slides axially along the liquid isolating sleeve (64).

6. The soil condition automatic monitoring device according to claim 1, characterized in that: The drilling positioning unit (2) comprises: A rotating sleeve (22) is vertically rotatably connected to the carrier plate (11), and a driving wheel (24) is disposed on the outer cover of the rotating sleeve (22); A drill rod (23) is coaxially connected to the lower side of the rotary sleeve (22); A driving motor (25) is vertically mounted on the carrier plate (11), and an output end of the driving motor (25) is connected to a driving wheel (24) through a transmission chain for transmission; A threaded rod (26) is vertically rotatably connected to the frame (1), and the carrier plate (11) is threadedly connected to the threaded rod (26); The control motor (27) is fixed on the frame (1), and the output end of the control motor (27) is transmission-connected with the threaded rod (26) through a gear.

7. The soil condition automatic monitoring device according to claim 2, characterized in that: The limiting spring (49) causes the spacer ring (5) to seal against the sealing ring (51) under the action of the spring tension, and at this time, the sealing valve (52) is separated from the ball groove in the capillary (42).

8. The soil condition automatic monitoring device according to claim 1, characterized in that: The liquid delivery tank (15) adopts a steady liquid delivery or a pulse liquid delivery mode.

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