Soil screening device for soil detection

Abstract

The invention discloses a soil screening device for soil detection, and relates to the technical field of soil detection, and the soil screening device is composed of a frame, a sampling assembly, a lifting assembly, a beating assembly and a collecting assembly. The frame is of a rectangular structure, universal wheels are arranged at the bottom, and counterweight boxes are arranged on the two sides. The sampling assembly comprises a round rod, sampling pieces and a hammer plate, the round rod slides in the round through hole of the frame, and the hammer plate is used for pressing downwards to enable the two sampling pieces of the semicircular truncated cone structures to be combined for sampling. The lifting assembly lifts the sampling piece through a lifting ferrule, an auxiliary rod, an air bag and other components. The hammering assembly is composed of a stand column, a sliding rail, a heavy hammer and the like, a winch pulls a pull rope to enable the heavy hammer to slide down along the sliding rail, and the sampling piece is hammered to screen soil. Finally, the collecting assembly pushes a connecting bent rod through a first air cylinder, a collecting frame and a disposable storage bag are moved to the position below the sampling piece, the screened soil is collected, and the soil sampling efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil detection, and in particular to a soil screening device for soil detection. Background Art

[0002] As a key means of assessing soil health, soil testing is vital to agricultural production, environmental protection and land resource management. Soil is the basis for plant growth, and its quality directly affects the yield and quality of crops. Through soil testing, we can accurately understand indicators such as nutrient content, pH, heavy metal pollution and microbial activity in the soil, providing data support for scientific fertilization, soil improvement and pollution prevention. At the same time, soil testing can also help to discover potential environmental risks, such as the threat of soil pollution to groundwater and ecosystems, so as to take timely measures to protect the ecological environment. With the development of modern agriculture and the enhancement of environmental awareness, the demand for soil testing is increasing, and its technology is also constantly improving. From traditional chemical analysis to modern instrument testing, soil testing is moving towards a faster, more accurate and more comprehensive direction, providing a strong guarantee for the sustainable use of soil resources and environmental protection.

[0003] Publication No. CN112014149B discloses a surface soil sampling device for soil detection, including a device body, a base fixed at the bottom end of the device body, a soil detector arranged at the top end of the device body, a display screen installed at the top end of the soil detector, a control button arranged on one side of the display screen, a rotating disk connected to the top end of the device body located on one side of the soil detector, and a fixing frame fixed on the outer wall of the rotating disk. The present invention is provided with a No. 3 motor, a No. 3 rod, a connecting sleeve, a moving rod, a moving plate, and a moving wheel. The output end of the No. 3 motor drives the No. 3 rod to rotate, the No. 3 rod drives the connecting sleeve to move, the movement of the connecting sleeve drives the moving rod to make a fan-shaped movement, the moving rod drives the moving plate to move downward, the moving plate moves downward and drives the moving wheel to move downward, the moving wheel is in close contact with the ground, and the user can drive the device body to move to a designated position through the moving wheel.

[0004] During the actual use of the above device, if the soil is hard, it will be difficult to insert the sampling tube into the soil for sampling, thus affecting the sampling efficiency. Summary of the invention

[0005] The present application solves the technical problem in the prior art that it is difficult to insert a sampling tube into the soil for sampling because the soil is relatively hard by providing a soil screening device for soil detection. A heavy hammer is used to strike a hammer plate so that the sampling piece can smoothly enter the interior of the soil for sampling in relatively hard soil. The repulsive force and the suction force of the electromagnet are alternately replaced so that the sampling piece can enter the interior of the soil more smoothly after entering the soil surface layer. The sampling piece is also lifted up by an air bag to achieve the technical effect of lifting the sampling piece.

[0006] The present application provides a soil screening device for soil detection, comprising a frame, a sampling assembly, a lifting assembly, a hammering assembly, and a collecting assembly; The frame is a rectangular structure, and a plurality of universal wheels are provided at the lower end of the frame. Both side ends of the frame are fixedly connected with a counterweight box for placing a counterweight block; A rectangular groove is formed at one end of the frame, and a round through hole is formed on the top surface of the rectangular groove; The sampling assembly comprises a round rod, a sampling piece and a hammer plate, wherein the round rod is slidably connected in the round through hole, the hammer plate is fixedly connected to the top of the round rod, and the lower end of the round rod is hinged with two sampling pieces; The two sampling pieces are both semi-conical structures, and the two sampling pieces are combined to form a cavity for loading the sampling soil, and the lower end of the combined pieces has an opening for allowing the soil to enter the cavity from the opening; Two pairs of electromagnets are also fixedly connected to the opposite surfaces of the two sampling members; The frame is symmetrically provided with lifting cavities at both ends close to the rectangular groove, and is also symmetrically provided with lifting through grooves communicating with the rectangular groove; The lifting assembly includes a lifting ring, an auxiliary rod, an air bag, a lifting plate, a dual-purpose air pump and a connecting air pipe, wherein the round rod is provided with a notch for limiting the upper and lower positions of the lifting ring, and the lifting ring is rotatably connected to the round rod through the notch; One end of the two auxiliary rods is symmetrically fixedly connected to the lifting ring, and the other end passes through the lifting slot and is fixedly connected to the lifting plate; the bottom of the lifting cavity is fixedly connected to the airbag, and the lifting plate is located at the upper end of the airbag, and the lifting plate is slidably connected to the lifting cavity; The dual-purpose air pump is also fixedly connected to the interior of the frame, one end of the connecting air pipe is fixedly connected to the dual-purpose air pump, and the other end is fixedly connected to the air bag; The hammering assembly includes a column, a slide rail, a heavy hammer, a first auxiliary roller, a second auxiliary roller, a winch and a pull rope, wherein the column is fixedly connected to the top of the frame and close to the round through hole, the end of the column facing the round through hole is provided with a slide rail, and the top end of the column is fixedly connected to the first auxiliary roller; The second auxiliary roller and the winch are fixedly connected in sequence at the top of the frame away from the round through hole; The weight is slidably connected to the slide rail and is concentric with the round rod; One end of the pull rope is fixedly connected to the top of the weight, and the other end passes through the first auxiliary roller and the second auxiliary roller respectively and is fixedly connected to the output end of the winch; A collecting groove is formed at the bottom of the frame and is close to the rectangular groove; The collection assembly includes a first cylinder, a connecting bent rod, a collection frame and a disposable storage bag, wherein the first cylinder is fixedly connected to one end in the collection tank, the output end of the first cylinder is fixedly connected to the connecting bent rod, the end of the connecting bent rod away from the first cylinder is fixedly connected to the collection frame, and a disposable storage bag is detachably provided on the collection frame.

[0007] Preferably, the column is further divided into a lower column and an upper column; the lower column is also fixedly connected to a second cylinder, wherein the lower column and the upper column are connected via the second cylinder; the slide rail is further divided into a fixed slide rail and a movable slide rail; wherein the fixed slide rail has a cavity, the movable slide rail is smaller in size than the fixed slide rail, and the movable slide rail is slidably connected in the cavity.

[0008] Preferably, the frame also includes a rotating motor, a belt, an auxiliary shaft, a first gear, a second gear and a fixed bar; the rotating motor is fixedly connected to the top of the frame and is close to one end of the round rod; the auxiliary shaft is fixedly connected to the top of the frame, wherein a cavity for storing the first gear and the second gear is opened in the frame; the belt is rotatably connected to the output end of the rotating motor and the auxiliary shaft respectively; the lower end of the auxiliary shaft is fixedly connected to the first gear; the inner ring of the second gear is fixedly connected to a plurality of the fixed bars; the outer cross-section of the round rod is opened with a plurality of grooves, and the size is the same as that of the fixed bars; the number of the grooves is equal to the number of the fixed bars; the fixed bar is clamped in the groove; the second gear is fixedly connected to the round rod through the fixed bar.

[0009] Preferably, an arc-shaped groove is formed on the inner ring of the second gear; a guide block is fixedly connected to one end of the fixing bar; and the guide block is slidably connected in the arc-shaped groove.

[0010] One or more technical solutions provided in this application have at least the following technical effects or advantages: By hammering the hammer plate with a heavy hammer, the sampling piece can smoothly enter the soil to take samples in harder soil. By alternating the repulsive force and suction force of the electromagnet, the sampling piece can enter the soil more smoothly after entering the soil surface, and the air bag can lift the sampling piece to achieve the technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a soil screening device for soil detection according to the present invention; Figure 2 A half-section structural diagram of a soil screening device for soil detection according to the present invention; Figure 3 It is a partial cross-sectional view of a soil screening device for soil detection according to the present invention; Figure 4 A top cross-sectional view of a frame of a soil screening device for soil detection according to the present invention; Figure 5 It is a partial cross-sectional view of a second embodiment of a soil screening device for soil detection according to the present invention; Figure 6 This is a schematic structural diagram of a third embodiment of a soil screening device for soil detection according to the present invention; Figure 7 It is a partial cross-sectional view of a third embodiment of a soil screening device for soil detection according to the present invention; Figure 8 This is a structural diagram of a fixing bar of a third embodiment of a soil screening device for soil detection according to the present invention; Fig. 9 This is a structural diagram of a guide block of a fourth embodiment of a soil screening device for soil detection according to the present invention.

[0012] In the figure: 100, frame, 101, rectangular groove, 102, round through hole, 103, lifting cavity, 104, lifting through groove, 105, collecting groove, 110, universal wheel, 120, counterweight box, 200, round rod, 201, sampling piece, 202, hammer plate, 203, electromagnet, 204, strip groove, 210, lifting ring, 211, auxiliary rod, 212, air bag, 213, lifting plate, 214, dual-purpose air pump, 215, connecting air pipe, 220, column, 2201, lower column, 2202, upper column, 221, Slide rail, 2211, fixed slide rail, 2212, movable slide rail, 222, weight, 223, first auxiliary roller, 224, second auxiliary roller, 225, winch, 226, pull rope, 227, second cylinder, 230, first cylinder, 231, connecting bent rod, 232, collecting frame, 233, disposable storage bag, 240, rotating motor, 241, belt, 242, auxiliary shaft, 243, first gear, 244, second gear, 245, fixing bar, 2441, arc groove, 2451, guide block. DETAILED DESCRIPTION

[0013] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0014] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0016] Embodiment 1: Figures 1 to 4 As shown, the present application is a soil screening device for soil detection, comprising a frame 100, a sampling assembly, a lifting assembly, a hammering assembly and a collecting assembly; The frame 100 is a rectangular structure, and a plurality of universal wheels 110 are provided at the lower end of the frame 100. Both side ends of the frame 100 are fixedly connected with a counterweight box 120 for placing a counterweight block; A rectangular groove 101 is formed at one end of the frame 100, and a round through hole 102 is formed on the top surface of the rectangular groove 101; The sampling assembly includes a round rod 200, a sampling piece 201 and a hammer plate 202, wherein the round rod 200 is slidably connected in the round through hole 102, the hammer plate 202 is fixedly connected to the top of the round rod 200, and the lower end of the round rod 200 is hinged with two sampling pieces 201; The two sampling pieces 201 are both semi-conical structures, and the two sampling pieces 201 are combined to form a cavity for loading sampling soil, and the lower ends of the combined pieces have an opening for allowing the soil to enter the cavity from the opening; Two pairs of electromagnets 203 are fixedly connected to the opposite surfaces of the two sampling members 201; The frame 100 is symmetrically provided with lifting cavities 103 at both ends close to the rectangular slot 101, and is also symmetrically provided with lifting through slots 104 communicating with the rectangular slot 101; The lifting assembly includes a lifting ring 210, an auxiliary rod 211, an air bag 212, a lifting plate 213, a dual-purpose air pump 214 and a connecting air pipe 215, wherein the round rod 200 is provided with a notch for limiting the upper and lower positions of the lifting ring 210, and the lifting ring 210 is rotatably connected to the round rod 200 through the notch; One end of the two auxiliary rods 211 is symmetrically fixedly connected to the lifting ring 210, and the other end passes through the lifting slot 104 and is fixedly connected to the lifting plate 213; the bottom of the lifting cavity 103 is fixedly connected to the airbag 212, and the lifting plate 213 is located at the upper end of the airbag 212, and the lifting plate 213 is slidably connected to the lifting cavity 103; The dual-purpose air pump 214 is also fixedly connected to the interior of the vehicle frame 100, one end of the connecting air pipe 215 is fixedly connected to the dual-purpose air pump 214, and the other end is fixedly connected to the air bag 212; The hammering assembly includes a column 220, a slide rail 221, a weight 222, a first auxiliary roller 223, a second auxiliary roller 224, a winch 225 and a pull rope 226, wherein the column 220 is fixedly connected to the top of the frame 100 and is close to the round through hole 102, the end of the column 220 facing the round through hole 102 is provided with a slide rail 221, and the top end of the column 220 is fixedly connected to the first auxiliary roller 223; the top of the frame 100 away from the round through hole 102 is fixedly connected to the second auxiliary roller 224 and the winch 225 in sequence; The weight 222 is slidably connected to the slide rail 221 and is coaxial with the round rod 200; One end of the pull rope 226 is fixedly connected to the top of the weight 222, and the other end passes through the first auxiliary roller 223 and the second auxiliary roller 224 and is fixedly connected to the output end of the winch 225; A collecting groove 105 is formed at the bottom of the frame 100 and is close to the rectangular groove 101; The collecting assembly includes a first cylinder 230, a connecting bent rod 231, a collecting frame 232 and a disposable storage bag 233, wherein the first cylinder 230 is fixedly connected to one end in the collecting tank 105, the output end of the first cylinder 230 is fixedly connected to the connecting bent rod 231, the end of the connecting bent rod 231 away from the first cylinder 230 is fixedly connected to the collecting frame 232, and a disposable storage bag 233 is detachable from the collecting frame 232.

[0017] Specific implementation: the frame 100 is moved to the position where soil needs to be collected by the universal wheel 110, and the counterweight block is placed in the counterweight box 120 to improve the stability of the frame 100 and reduce the shaking effect of the hammer assembly on the frame 100 when hammering. The electromagnet 203 is started to make the two sampling pieces 201 attract each other, and then the sampling piece 201 is aligned with the soil position to be sampled and pressed against the surface of the soil, and the winch 225 is started. The heavy hammer 222 repeatedly hammers the hammer plate 202. When the heavy hammer 222 is lifted by hammering, the repulsive force and the suction force of the electromagnet 203 can be alternately replaced, so that the two sampling pieces 201 can be slightly opened, and the surface soil on both sides of the sampling piece 201 can be pushed away; when the two sampling pieces 201 enter the soil, the soil enters the two sampling pieces. In the inner cavity formed by the sample piece 201, after sampling, the dual-purpose air pump 214 is started, so that the air bag 212 expands upward in the lifting cavity 103 to drive the lifting plate 213 to move upward, the lifting plate 213 drives the auxiliary rod 211 and the lifting ring 210 to move upward, the lifting ring 210 drives the round rod 200 to move upward, the sampling piece 201 is moved to a position higher than the collection frame 232 and the dual-purpose air pump 214 is turned off, and then the first cylinder 230 is started, and the first cylinder 230 drives the connecting bent rod 231 and the collection frame 232 to extend forward to the bottom direction of the sampling piece 201. At this time, the electromagnet 203 of the sampling piece 201 is adjusted to a mutually repelling magnetic force, so that the two sampling pieces 201 are opened, and the sampled soil is poured into the disposable storage bag 233, that is, the sampling work of soil screening is completed.

[0018] Beneficial effect: The heavy hammer 222 strikes the hammer plate 202, so that the sampling piece 201 can smoothly enter the soil to take samples in harder soil. The repulsive force and the suction force of the electromagnet 203 are alternately replaced, so that the sampling piece 201 can enter the soil more smoothly after entering the soil surface, and the sampling piece 201 is lifted up by the air bag 212. The technical problem that it is difficult to insert the sampling tube into the soil for sampling when the soil is hard is effectively solved.

[0019] Embodiment 2: Since the soil on the surface is relatively hard, in order to allow the heavy hammer 222 to cope with soils of different hardness, the column 220 and the slide rail 221 are improved; like Figure 5 As shown, the column 220 is further divided into a lower column 2201 and an upper column 2202; the lower column 2201 is further fixedly connected to a second cylinder 227, wherein the lower column 2201 is connected to the upper column 2202 via the second cylinder 227; The slide rail 221 is further divided into a fixed slide rail 2211 and a movable slide rail 2212 , wherein the fixed slide rail 2211 has a cavity, the movable slide rail 2212 is smaller than the fixed slide rail 2211 , and the movable slide rail 2212 is slidably connected in the cavity.

[0020] One or more technical solutions provided in this application have at least the following technical effects or advantages: The hammering height of the heavy hammer 222 is controlled, thereby controlling the hammering force thereof. According to the different hardness of the surface soil and the inner soil of the soil, the hammering force of the heavy hammer 222 is controlled, so that the heavy hammer 222 can cope with soils of different hardnesses and improve its applicable environmental range.

[0021] Embodiment 3: Some soils have a certain viscosity. In order to improve the efficiency of the airbag 212 in lifting the sampling assembly, the frame 100 and the round rod 200 are improved; like Figures 6 to 8 As shown, the frame 100 further includes a rotating motor 240, a belt 241, an auxiliary shaft 242, a first gear 243, a second gear 244 and a fixing bar 245; The rotating motor 240 is fixedly connected to the top of the frame 100 and close to one end of the round rod 200; The auxiliary shaft 242 is fixedly connected to the top of the frame 100, wherein a cavity for storing the first gear 243 and the second gear 244 is opened in the frame 100; The belt 241 is rotatably connected to the output end of the rotating motor 240 and the auxiliary shaft 242 respectively; the lower end of the auxiliary shaft 242 is fixedly connected to the first gear 243; The inner ring of the second gear 244 is fixedly connected with a plurality of fixing bars 245; The outer cross section of the round rod 200 is provided with a plurality of slots 204, and the size of the slots 204 is the same as that of the fixing bars 245; the number of the slots 204 is equal to the number of the fixing bars 245; The fixing strip 245 is clamped in the strip groove 204; The second gear 244 is fixedly connected to the round rod 200 via a fixing bar 245 .

[0022] One or more technical solutions provided in this application have at least the following technical effects or advantages: The round rod 200 is driven to rotate by the fixing bar 245, so that the sticky connection between the sampled soil and the original soil can be broken by the torsional force. After the sticky connection is broken, the fixing bar 245 drives the round rod 200 to keep rotating during the rising process to prevent it from getting stuck during the process of pulling out the sampling component, thereby effectively improving its lifting efficiency.

[0023] Embodiment 4: The soil during the sampling process has a certain viscosity, and it is necessary to further break the sticky connection between the sampled soil and the original soil, so the second gear 244 and the fixing bar 245 are further improved; like Fig. 9As shown, an arc groove 2441 is formed on the inner ring of the second gear 244 ; a guide block 2451 is fixedly connected to one end of the fixing bar 245 ; and the guide block 2451 is slidably connected in the arc groove 2441 .

[0024] One or more technical solutions provided in this application have at least the following technical effects or advantages: When the second gear 244 drives the round rod 200 to rotate, there can be a certain height of lifting, so that the sticky connection between the sampled soil and the original soil can be interrupted by the torsional force and the lifting force. After the sticky connection is interrupted, the sampling assembly is lifted in cooperation with the airbag 212, thereby improving the sampling efficiency.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soil screening device for soil detection, comprising a frame (100), a sampling assembly, a lifting assembly, a beating assembly and a collecting assembly, characterized in that: The vehicle frame (100) is a rectangular structure, and a plurality of universal wheels (110) are provided at the lower end of the vehicle frame (100). Both side ends of the vehicle frame (100) are fixedly connected with a counterweight box (120) for placing a counterweight block; A rectangular groove (101) is formed at one end of the vehicle frame (100), and a round through hole (102) is formed on the top surface of the rectangular groove (101); The sampling assembly comprises a round rod (200), a sampling piece (201) and a hammer plate (202), wherein the round rod (200) is slidably connected in the round through hole (102), the hammer plate (202) is fixedly connected to the top of the round rod (200), and the two sampling pieces (201) are hingedly connected to the lower end of the round rod (200); The two sampling pieces (201) are both semi-conical structures, and the two sampling pieces (201) are combined to form a cavity, and the combined lower ends have an opening; Two pairs of electromagnets (203) are also fixedly connected to the opposite surfaces of the two sampling members (201); The vehicle frame (100) has lifting cavities (103) symmetrically formed at both ends close to the rectangular groove (101), and also has lifting through grooves (104) symmetrically formed to communicate with the rectangular groove (101).

2. A soil screening device for soil detection as claimed in claim 1, characterized in that: The lifting assembly comprises a lifting ring (210), an auxiliary rod (211), an air bag (212), a lifting plate (213), a dual-purpose air pump (214) and a connecting air pipe (215), wherein the round rod (200) is provided with a notch for limiting the upper and lower positions of the lifting ring (210), and the lifting ring (210) is rotatably connected to the round rod (200) via the notch.

3. A soil screening device for soil detection as claimed in claim 2, characterized in that: One end of the two auxiliary rods (211) is symmetrically fixedly connected to the lifting ring (210), and the other end passes through the lifting slot (104) and is fixedly connected to the lifting plate (213); the bottom of the lifting cavity (103) is fixedly connected to the airbag (212), and the lifting plate (213) is located at the upper end of the airbag (212), and the lifting plate (213) is slidably connected to the lifting cavity (103).

4. A soil screening device for soil detection as claimed in claim 3, characterized in that: The hammering assembly comprises a column (220), a slide rail (221), a weight (222), a first auxiliary roller (223), a second auxiliary roller (224), a winch (225) and a pull rope (226), wherein the column (220) is fixedly connected to the top of the frame (100) and close to the round through hole (102), the slide rail (221) is provided at one end of the column (220) facing the round through hole (102), and the first auxiliary roller (223) is fixedly connected to one end of the top of the column (220); The second auxiliary roller (224) and the winch (225) are fixedly connected in sequence to the top of the vehicle frame (100) away from the round through hole (102); The weight (222) is slidably connected to the slide rail (221) and is cocentric with the round rod (200); One end of the pull rope (226) is fixedly connected to the top of the weight (222), and the other end passes through the first auxiliary roller (223) and the second auxiliary roller (224) respectively and is fixedly connected to the output end of the winch (225); A collecting groove (105) is provided at the bottom of the vehicle frame (100) and is close to the rectangular groove (101).

5. A soil screening device for soil detection as claimed in claim 4, characterized in that: The collection assembly comprises a first cylinder (230), a connecting bent rod (231), a collection frame (232) and a disposable storage bag (233), wherein the first cylinder (230) is fixedly connected to one end in the collection tank (105), and the output end of the first cylinder (230) is fixedly connected to the connecting bent rod (231); One end of the connecting bent rod (231) away from the first cylinder (230) is fixedly connected to the collecting frame (232), and a disposable storage bag (233) is detachably provided on the collecting frame (232).

6. A soil screening device for soil detection as claimed in claim 5, characterized in that: The column (220) is further divided into a lower column (2201) and an upper column (2202); the lower column (2201) is further fixedly connected to a second cylinder (227), wherein the lower column (2201) and the upper column (2202) are connected via the second cylinder (227); the slide rail (221) is further divided into a fixed slide rail (2211) and a movable slide rail (2212); wherein the fixed slide rail (2211) has a cavity, the movable slide rail (2212) is smaller than the fixed slide rail (2211), and the movable slide rail (2212) is slidably connected in the cavity.

7. A soil screening device for soil detection as claimed in claim 6, characterized in that: The vehicle frame (100) further comprises a rotating motor (240), a belt (241), an auxiliary shaft (242), a first gear (243), a second gear (244) and a fixing bar (245); the rotating motor (240) is fixedly connected to the top of the vehicle frame (100) and close to one end of the round rod (200); the auxiliary shaft (242) is fixedly connected to the top of the vehicle frame (100), wherein a cavity for storing the first gear (243) and the second gear (244) is opened in the vehicle frame (100).

8. A soil screening device for soil detection as claimed in claim 7, characterized in that: The belt (241) is rotationally connected to the output end of the rotating motor (240) and the auxiliary shaft (242) respectively; the lower end of the auxiliary shaft (242) is fixedly connected to the first gear (243); and the inner ring of the second gear (244) is fixedly connected to a plurality of the fixing bars (245).

9. A soil screening device for soil detection as claimed in claim 8, characterized in that: The outer cross-section of the round rod (200) is provided with a plurality of slots (204) of the same size as the fixing strips (245); the number of the slots (204) is equal to the number of the fixing strips (245); the fixing strips (245) are snap-fitted into the slots (204); and the second gear (244) is fixedly connected to the round rod (200) via the fixing strips (245).

10. A soil screening device for soil detection as claimed in claim 9, characterized in that: The inner ring of the second gear (244) is provided with an arc-shaped groove (2441); one end of the fixing bar (245) is fixedly connected to a guide block (2451); and the guide block (2451) is slidably connected in the arc-shaped groove (2441).

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