A soil sampler for soil ecological environment detection work

Abstract

The application discloses a kind of soil sampler for soil ecological environment detection work, it is related to environmental science and engineering technical field, including frame body, frame body is by support foot and stands on ground;Sampling part: including coaxial sleeve and can relatively rotate inner container and outer container, inner container is connected by elastic element and outer container and forms torque transmission;Telescopic part: install in frame body, for sampling part provides axial propulsive force;Driving part: install in telescopic part movable end, and can move along frame body axial direction;For driving the rotation of inner container of sampling part;Adjusting part: including coaxial setting dynamic tooth and fixed tooth, reset spring is rotationally arranged between dynamic tooth and fixed tooth, dynamic tooth and inner container synchronous rotation, dynamic tooth can produce axial displacement with fixed tooth;Through the deflection angle of sampler inner container and outer container, real-time sensing soil hardness change and automatically adjusting drilling strategy, avoid the drilling difficulty or sample damage problem that traditional sampler is prone to when facing different hardness soil.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of environmental science and engineering technology, in particular to a soil sampler for soil ecological environment detection work. BACKGROUND

[0002] In the field of soil ecological environment detection and related scientific research, agriculture, geological exploration, etc., obtaining representative and structurally complete soil samples is the key to accurately analyzing and evaluating soil conditions and formulating treatment measures. Therefore, efficient and accurate sampling equipment with little damage to soil structure is essential.

[0003] The existing soil sampler has many shortcomings: first, it is difficult to adapt to different hardness of soil, and the working mode and parameters are fixed or need to be adjusted manually. In soft soil, excessive pressure may cause excessive extrusion of the soil layer and damage the soil structure. In hard soil, insufficient axial cutting force may cause sampling difficulties. Second, it is difficult to maintain the integrity of the soil structure, and the control of the cutting force in different directions of the soil is unreasonable, which may distort the soil layer and change the particle distribution, making it difficult to accurately reflect the in-situ characteristics of the soil. Third, the demand for manual intervention is high, and the efficiency is low. The operator needs to frequently adjust the parameters based on experience, which increases the complexity and uncertainty of the operation, and it is difficult to meet the demand of large-scale detection. Manual differences may also affect the consistency of the sampling results. SUMMARY

[0004] The technical problem solved by the present application is to provide a soil sampler for soil ecological environment detection work. By adjusting the deflection angle of the inner and outer barrels of the sampling part, the hardness of the soil can be sensed in real time and the drilling strategy can be automatically adjusted. This avoids the problems of drilling difficulty or sample damage that may occur when traditional samplers face different hardness of soil, and significantly improves the success rate of sampling.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a soil sampler for soil ecological environment detection work, comprising a frame:

[0006] The frame is erected on the ground by support feet and is used to install and fix other components;

[0007] The sampling part includes an inner barrel and an outer barrel that are coaxially sleeved and can rotate relative to each other. The inner barrel is connected to the outer barrel by a torsion transmission connection through an elastic member. When the hardness of the soil changes and causes the torsion imbalance between the inner and outer barrels, the two barrels will rotate relative to each other;

[0008] The telescopic member is installed on the frame and is used to provide axial thrust for the sampling part;

[0009] The driving part is installed on the movable end of the telescopic member and can move axially along the frame. It is used to drive the rotation of the inner barrel of the sampling part;

[0010] Adjusting part: including coaxially arranged movable tooth and fixed tooth, the movable tooth and the fixed tooth are provided with reset spring arranged in the axial direction, the movable tooth moves synchronously with the inner container, the movable tooth can produce axial displacement with the fixed tooth; according to the deflection angle of the outer container relative to the inner container, the depth of the movable tooth embedded in the fixed tooth is adjusted, so that the axial reciprocating distance of the inner container is controlled in real time.

[0011] As a further scheme of the present application, the driving part comprises:

[0012] Shell: slidingly arranged on the frame body;

[0013] Driving motor: installed in the shell, the output end of which is connected with the speed regulator;

[0014] Transmission member: synchronously rotating with the output end of the speed regulator;

[0015] Transmission rod: slidingly arranged on the output end of the transmission member, the transmission member drives the inner container to synchronously rotate and axially reciprocate through the transmission rod;

[0016] Fixed tooth and movable tooth: the fixed tooth is fixedly arranged on the shell, the movable tooth synchronously rotates with the transmission member through the spline, the movable tooth is fixedly arranged with a lifting ring embedded in the transmission rod, and the movable tooth drives the transmission rod to axially displace through the lifting ring; the adjacent end faces of the fixed tooth and the movable tooth are both provided with wave-shaped teeth, and the two are connected through the reset spring;

[0017] When the deflection angle of the outer container relative to the inner container changes, the depth of the movable tooth embedded in the fixed tooth changes, the axial movement stroke of the transmission rod changes, so as to adjust the axial reciprocating stroke of the inner container.

[0018] As a further scheme of the present application, the adjusting part comprises:

[0019] Fixed ring: fixedly arranged in the shell, and a stepped limiting groove is formed in the inner wall of the fixed ring;

[0020] Movable ring: rotationally arranged at the bottom of the movable tooth, and a limiting block is fixedly arranged on the side wall of the movable ring, the limiting block is slidingly arranged in the limiting groove;

[0021] Movable roller group: a plurality of groups are arranged, the number of which is the same as the number of the stepped horizontal planes of the limiting groove, and the movable roller group is slidingly arranged in the fixed ring and can extend into the stepped horizontal planes of the limiting groove;

[0022] Spring rod: installed on the movable roller group, used for adjusting the rotation resistance of the limiting block;

[0023] Fixed roller group: fixedly arranged on the limiting block, and the fixed roller group overlaps the circumferential part of the movable roller group.

[0024] As a further scheme of the present application, the adjusting part further comprises:

[0025] Pressing plate: axially slidingly arranged in the fixed ring, used for pressing down the spring rod to adjust the pre-tightening force of the spring rod;

[0026] Adjusting sleeve: rotationally arranged outside the fixed ring, the inner side end is threadedly connected with the pressing plate, used for driving the pressing plate to axially move relative to the fixed ring.

[0027] As a further scheme of the present application, the sampling part further comprises:

[0028] Dial lever: slidingly connected with the transmission rod through the spline;

[0029] Sleeve ring: rotationally arranged at the bottom of the fixed ring, and connected with the dial lever through the elastic element;

[0030] Extension rod: detachably connected between the transmission rod and the inner container, used for transmitting rotation and axial displacement;

[0031] Sleeve: connecting the outer container and the sleeve ring, so that the sleeve ring and the outer container rotate synchronously.

[0032] As a further scheme of the present application, the inner container is sleeved with a sampling container, and the inner wall of the sampling container is flush with the inner wall of the bottom of the inner container;

[0033] The bottom of the inner container is fixed with a sampling cutter head, and the outer wall is provided with a spiral chip removal groove;

[0034] The bottom of the outer container is provided with a chamfer for cutting the side wall of the sampling hole.

[0035] As a further scheme of the present application, the top of the extension rod is provided with a slot, the bottom of the transmission rod is fixedly provided with a connecting bolt inserted into the slot, and the connecting bolt is inserted into the slot and fixed radially by an inner bolt;

[0036] The top of the sleeve is sleeved with the sleeve ring through a connecting sleeve, and is fixed radially by an outer bolt.

[0037] Compared with the prior art, the present application has the following advantages:

[0038] In the present application, the relative rotation angle between the outer container and the inner container is used to perceive the soil hardness, and the motion state of the inner container is adjusted synchronously, so that full-stratum coverage from soft plastic soil to strong weathered rock is realized; in soft soil, the inner container is automatically switched to pure rotation mode to avoid sample compression caused by axial pressure; the coupling control of low-speed propulsion and rotary cutting maintains the in-situ characteristics of the soil liquid limit index IL; in hard soil, the combined action of axial impact stroke and rotation reduces the cutting resistance, reduces the sample layering distortion angle, reduces the sample structure damage, and the axial impact stroke of the inner container is dynamically adjusted according to the soil hardness, so that the device can adapt to different geological conditions without manual intervention, and the operation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0040] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0041] Figure 2 It is a schematic diagram of the cross-sectional structure of the present application.

[0042] Figure 3 It is a schematic diagram of the cross-sectional structure of the present application. Figure 2 It is a schematic diagram of the enlarged structure at A in the present application.

[0043] Figure 4 It is a schematic diagram of the enlarged structure at B in the present application. Figure 2 It is a schematic diagram of the enlarged structure at B in the present application.

[0044] Figure 5 It is a schematic diagram of the enlarged structure at C in the present application. Figure 2 It is a schematic diagram of the enlarged structure at C in the present application.

[0045] Figure 6 It is a schematic diagram of the exploded structure of the present application.

[0046] Figure 7 It is a schematic diagram of the enlarged structure at D in the present application. Figure 6 It is a schematic diagram of the enlarged structure at D in the present application.

[0047] Figure 8 It is a schematic diagram of the enlarged structure at E in the present application. Figure 6 It is a schematic diagram of the enlarged structure at E in the present application.

[0048] Figure 9 It is a schematic diagram of the cross-sectional structure of the present application.

[0049] In the drawings, the components represented by each reference numeral are listed as follows:

[0050] 1, frame body; 2, telescopic part; 3, driving part; 31, shell; 32, driving motor; 34, transmission part; 35, transmission rod; 37, lifting ring; 4, sampling part; 41, inner container; 411, sampling container; 412, sampling cutter head; 413, helical chip removal groove; 42, outer container; 43, elastic part; 44, push rod; 45, sleeve ring; 48, extension rod; 49, sleeve; 50, connecting bolt; 51, inner bolt; 52, connecting sleeve; 53, outer bolt; 6, adjusting part; 61, fixed ring; 611, limiting groove; 62, movable ring; 621, limiting block; 63, movable roller shaft set; 64, spring rod; 65, fixed roller shaft set; 66, pressing plate; 67, adjusting sleeve; 71, movable tooth; 72, fixed tooth; 73, return spring. DETAILED DESCRIPTION

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Please see Figures 1-9 The present invention provides a technical solution: a soil sampler for soil ecological environment testing, including a frame 1, which stands on the ground with support legs for installing and fixing other components;

[0053] Sampling unit 4: includes an inner liner 41 and an outer liner 42 that are coaxially fitted and can rotate relative to each other. The inner liner 41 is connected to the outer liner 42 by an elastic element 43 to form a torque transmission connection. When the change in soil hardness causes the torque between the outer liner 42 and the inner liner 41 to become unbalanced, the two will rotate relative to each other.

[0054] Telescopic component 2: Installed on the frame 1, used to provide axial thrust to the sampling unit 4; in this embodiment, the telescopic component 2 is a hydraulic component, including but not limited to a hydraulic cylinder;

[0055] Drive unit 3: Installed on the movable end of telescopic component 2 and capable of moving along the axial direction of frame 1; used to drive the inner liner 41 of sampling unit 4 to rotate; the rotation of inner liner 41 can generate circumferential cutting force on the soil in contact with it, while the axial periodic advance and retraction of inner liner 41 can generate axial cutting force on the soil; the multi-angle cutting force can ensure the sampling speed.

[0056] Adjustment unit 6 includes a movable tooth 71 and a fixed tooth 72 arranged coaxially. An axially arranged return spring 73 is rotatably arranged between the movable tooth 71 and the fixed tooth 72. The movable tooth 71 moves synchronously with the inner liner 41 (synchronous movement includes axial rotation and lifting). The movable tooth 71 can generate axial displacement with the fixed tooth 72. According to the deflection angle of the outer liner 42 relative to the inner liner 41, the depth to which the movable tooth 71 can be embedded in the fixed tooth 72 is adjusted to control the axial reciprocating distance of the inner liner 41 in real time.

[0057] See Figure 1 and Figure 2 When in use, the frame 1 is placed on the ground with its support legs on the soil to be sampled. The drive unit 3 and the sampling unit 4 are moved into the soil by the telescopic component 2. The telescopic component 2 provides downward pressure to the sampling unit 4, so that the sampling unit 4 is inserted into the soil. Compared with the manual pressing method, it can provide stable downward pressure and reduce damage to the sample structure. At the same time, the drive unit 3 drives the inner liner 41 to rotate, and the inner liner 41 drives the outer liner 42 to rotate along with it through the elastic component 43.

[0058] Soft soil: due to the small cutting resistance of soft soil, the resistance of the soil to the outer barrel 42 is small, the outer barrel 42 can rotate synchronously with the inner barrel 41 or produce slight deflection, and does not contact the fixed tooth 72. When the movable tooth 71 rotates synchronously with the inner barrel 41, the movable tooth 71 does not contact the fixed tooth 72, and the movable tooth 71 is not affected by the fixed tooth 72. The inner barrel 41 only rotates and does not have axial displacement. The axial cutting force on the soil only comes from the telescopic part 2. The speed of the sampling part 4 into the soil is slow. The inner barrel 41 rotates and continuously advances slowly into the soil. It can avoid the axial reciprocating movement of the inner barrel 41 to generate excessive axial pressure on the soft soil, which can destroy the structure of the soft soil layer, and avoid the soil being compressed due to the too fast advancing speed, which can destroy the integrity of the soil structure.

[0059] Hard soil: due to the large cutting resistance of hard soil, the resistance of the soil to the outer barrel 42 is increased. With the increase of the hardness of the soil, the outer barrel 42 is relatively deflected with the inner barrel 41. The adjusting part 6 increases the maximum depth of the movable tooth 71 embedded in the fixed tooth 72. When the movable tooth 71 rotates synchronously with the inner barrel 41, the movable tooth 71 will be axially reciprocated under the influence of the fixed tooth 72, so that the inner barrel 41 is axially periodically reciprocated. At this time, the inner barrel 41 not only rotates, but also periodically reciprocates along the axial direction. The radial cutting force of the inner barrel 41 on the soil is increased. In combination with the rotary motion, a "wedge-shaped crushing" effect is formed, which can reduce the cutting resistance of the hard soil and improve the cutting efficiency and the success rate of sampling.

[0060] In summary, the relative rotation angle between the outer barrel 42 and the inner barrel 41 can perceive the hardness of the soil, and the motion state of the inner barrel 41 can be adjusted synchronously, so that the full stratigraphic coverage from soft soil to strong weathered rock can be realized. In soft soil, the inner barrel 41 is automatically switched to a pure rotation mode to avoid sample compression caused by axial pressure. The coupling control of low-speed advancement and rotary cutting can maintain the in-situ characteristics of the liquid limit index IL of the soil. In hard soil, the combination of axial impact stroke and rotation can reduce the cutting resistance and the sample layering distortion angle, reduce the sample structure damage, and the axial impact stroke of the inner barrel 41 is dynamically adjusted according to the hardness of the soil, so that the device can adapt to different geological conditions without manual intervention, and the operation efficiency is improved.

[0061] As a further scheme of the present application, the driving part 3 comprises:

[0062] The shell 31 is arranged on the frame 1 and slides with the telescopic part 2;

[0063] The driving motor 32 is installed in the shell 31, and the output end of the driving motor 32 is connected with the speed regulator;

[0064] The transmission part 34 rotates synchronously with the output end of the speed regulator;

[0065] Transmission rod 35: slidingly arranged at the output end of transmission member 34, and rotating with transmission member 34, transmission member 34 drives inner container 41 to rotate and axially reciprocate synchronously through transmission rod 35;

[0066] Fixed tooth 72 and movable tooth 71: fixed tooth 72 is fixedly arranged on shell 31, movable tooth 71 rotates synchronously with transmission member 34 through the spline, movable tooth 71 is fixedly arranged with lifting ring 37 embedded in transmission rod 35, movable tooth 71 drives transmission rod 35 to axially reciprocate through lifting ring 37; the adjacent end faces of fixed tooth 72 and movable tooth 71 are provided with wave-shaped teeth, and the two are connected through return spring 73;

[0067] Referring to Figure 1 , Figure 2 and Figure 6 , drive motor 32 drives transmission member 34 to rotate through a speed regulator (in this embodiment, a planetary gear speed regulator), transmission member 34 drives inner container 41 to rotate synchronously through transmission rod 35; at the same time, transmission member 34 also drives movable tooth 71 to rotate, movable tooth 71 and fixed tooth 72 produce relative rotation, when movable tooth 71 is embedded in fixed tooth 72, the wave crests of the wave-shaped teeth on fixed tooth 72 and movable tooth 71 are in contact with each other, so that movable tooth 71 axially reciprocates and stretches return spring 73, when the wave crests of the wave-shaped teeth on fixed tooth 72 and movable tooth 71 are out of position, return spring 73 resets movable tooth 71, so as to realize the periodic axial reciprocation of movable tooth 71, movable tooth 71 drives transmission rod 35 to axially reciprocate relative to transmission member 34 through lifting ring 37, so that inner container 41 can rotate and periodically reciprocate along the axial direction at the same time;

[0068] When the deflection angle of outer container 42 relative to inner container 41 changes, the maximum depth of embedding of movable tooth 71 in fixed tooth 72 changes, and the axial movement stroke of transmission rod 35 changes, so as to realize the adjustment of the axial reciprocation stroke of inner container 41;

[0069] As a further scheme of the present application, the adjusting part 6 comprises:

[0070] Fixed ring 61: fixedly arranged in shell 31, and a stepped limiting groove 611 is formed in the inner wall thereof;

[0071] Movable ring 62: rotatably arranged at the bottom of movable tooth 71, and a limiting block 621 is fixedly arranged on the side wall thereof, and the limiting block 621 is slidingly arranged in the limiting groove 611;

[0072] Movable roller shaft group 63: provided with a plurality of groups, and the number is the same as the number of stepped horizontal planes of limiting groove 611, and the movable roller shaft group 63 is slidingly arranged in fixed ring 61 and can extend into the stepped horizontal planes of limiting groove 611;

[0073] Spring rod 64: mounted on movable roller shaft group 63, used for adjusting the rotating resistance of limiting block 621;

[0074] Fixed roller group 65: fixed on the limiting block 621, and the circumferential part of the fixed roller group 65 and the dynamic roller group 63 overlap;

[0075] Referring to Figure 2 , Figure 6 and Figure 7 , the limiting block 621 is located on the stepped surface of the limiting groove 611, and the limiting groove 611 limits the axial displacement of the limiting block 621 along the fixed ring 61, thereby limiting the axial displacement of the dynamic ring 62 fixed on the limiting block 621. When the limiting block 621 is located on different stepped surfaces of the limiting groove 611, the displacement of the dynamic ring 62 is different. When the soil is soft, the limiting block 621 is located at the bottom of the limiting groove 611 (see Figure 6 ) and is in contact with the stepped surface. As the hardness of the soil changes, the limiting block 621 gradually rotates with the outer barrel 42, so that the limiting block 621 axially overlaps with the stepped surface of the limiting groove 611 at different heights, so that the axial movement distance of the limiting block 621 changes, thereby changing the displacement of the dynamic tooth 71 rotatingly arranged on the top of the dynamic ring 62, changing the radial overlap area of the dynamic tooth 71 and the fixed tooth 72, and adjusting the axial displacement of the dynamic tooth 71 and the inner barrel 41, so as to realize that the outer barrel 42 senses the hardness of the soil and automatically adjusts the axial displacement of the inner barrel 41, realizes intelligent adaptation, and reduces the operation difficulty;

[0076] The adjacent surfaces of the fixed roller group 65 and the dynamic roller group 63 are provided with a plurality of rollers, which can reduce the moving resistance of the fixed roller group 65 and the dynamic roller group 63 and improve the sensitivity of the deflection of the outer barrel 42;

[0077] The circumferential part of the fixed roller group 65 and the dynamic roller group 63 overlaps, the resistance of the limiting block 621 when rotating increases, and the rotating resistance of the limiting block 621 is proportional to the pressure applied by the spring rod 64 on the dynamic roller group 63. The limiting block 621 needs to overcome the pressure applied by the spring rod 64 on the dynamic roller group 63 to make the dynamic roller group 63 rise until there is no circumferential overlap between the fixed roller group 65 and the dynamic roller group 63, and then the limiting block 621 can be moved to the next stepped surface.

[0078] As a further scheme of the application, the adjusting part 6 further comprises:

[0079] The pressing plate 66 is axially slidably arranged in the fixed ring 61, and is used for pressing the spring rod 64 to adjust the pre-tightening force of the spring rod 64;

[0080] The adjusting sleeve 67 is rotationally arranged outside the fixed ring 61, and the inner side end thereof is threadedly connected with the pressing plate 66, and is used for driving the pressing plate 66 to axially move relative to the fixed ring 61;

[0081] Referring to Figure 2 , Figure 3 , Figure 6 and Figure 7, the rotating adjusting sleeve 67 is synchronous with the pressing plate 66 screwed to it to rise or fall, the strength of the spring rod 64 pressed by the pressing plate 66 changes, and the pressure applied by the spring rod 64 to the movable roller shaft group 63 changes;

[0082] When the pressure applied by the spring rod 64 to the movable roller shaft group 63 is reduced, the rotating resistance of the outer barrel 42 is reduced, the soil resistance borne by the outer barrel 42 is unchanged, thus the rotating angle of the outer barrel 42 is increased, the sensitivity of the deflection of the outer barrel 42 is improved, the fast correction is realized, and the drilling in complex strata is applicable;

[0083] When the pressure applied by the spring rod 64 to the movable roller shaft group 63 is increased, the rotating resistance of the outer barrel 42 is increased, the soil resistance borne by the outer barrel 42 is unchanged, thus the rotating angle of the outer barrel 42 is reduced, the sensitivity of the deflection of the outer barrel 42 is reduced, the stability of the system is ensured, and the drilling in homogeneous strata is applicable.

[0084] As a further scheme of the present application, the sampling part 4 further comprises:

[0085] The shifting rod 44 is slidably connected with the transmission rod 35 through the spline;

[0086] The sleeve ring 45 is rotatably arranged at the bottom of the fixed ring 61 and connected with the shifting rod 44 through the elastic element 43;

[0087] The lengthened rod 48 is detachably connected between the transmission rod 35 and the inner barrel 41 and used for transmitting the rotation and the axial displacement;

[0088] The sleeve pipe 49 connects the outer barrel 42 with the sleeve ring 45, so that the sleeve ring 45 is synchronous with the outer barrel 42 in rotation;

[0089] Referring to Figure 6 and Figure 8 , when the transmission rod 35 rotates, the transmission rod 35 drives the inner barrel 41 to rotate and axially displace through the lengthened rod 48; at the same time, the transmission rod 35 drives the shifting rod 44 to rotate through the spline, and the shifting rod 44 is synchronous with the inner barrel 41 in rotation;

[0090] The shifting rod 44 drives the sleeve ring 45 to rotate through the elastic element 43, the sleeve ring 45 drives the outer barrel 42 to rotate through the sleeve pipe 49, and the sleeve ring 45 is synchronous with the outer barrel 42 in rotation;

[0091] When the soil resistance borne by the inner barrel 41 and the outer barrel 42 is increased, since the inner barrel 41 is directly driven by the transmission rod 35, the rotating speed of the inner barrel 41 is not affected, while the rotating speed of the outer barrel 42 is instantaneously reduced, the rotating angles of the inner barrel 41 and the outer barrel 42 are changed, the elastic element 43 is stretched or compressed, until the elastic element 43 overcomes the soil resistance applied to the outer barrel 42, the inner barrel 41 and the outer barrel 42 restore synchronous rotation, so that the relative rotation angle between the outer barrel 42 and the inner barrel 41 is perceived to sense the hardness of the soil;

[0092] As a further scheme of the present application, the inner container 41 is sleeved with a sampling container 411, and the inner wall of the sampling container 411 is flush with the inner wall of the bottom of the inner container 41.

[0093] The bottom of the inner container 41 is fixed with a sampling cutter head 412, and the outer wall is provided with a spiral chip removal groove 413 for discharging the soil material generated in the sampling cutter head 412.

[0094] The bottom of the outer container 42 is provided with a chamfer for cutting the side wall of the sampling hole.

[0095] Referring to Figure 2 and Figure 5 , the inner container 41 and the top of the sampling container 411 have a gap, and when the inner container 41 rotates, the sampling container 411 rotates at a low speed or does not rotate due to the resistance of the soil. When the top of the sampling container 411 contacts the inner container 41, the sampling container 411 descends with the inner container 41, and when the inner container 41 rises, the sampling container 411 does not rise with the inner container 41 due to the resistance of the soil, thereby reducing the damage to the soil structure when the inner container 41 rotates and reciprocates axially.

[0096] As a further scheme of the present application, the top of the extension rod 48 is provided with a slot, the bottom of the transmission rod 35 is fixedly provided with a connecting bolt 50 inserted into the slot, and the connecting bolt 50 is inserted into the slot and fixed radially by an inner bolt 51.

[0097] Referring to Figure 2 and Figure 4 , during installation, the slot at the top of the extension rod 48 is aligned with and inserted into the connecting bolt 50 at the bottom of the transmission rod 35, and the two can be installed together by the inner bolt 51.

[0098] The top of the sleeve 49 is sleeved with the sleeve ring 45 through a connecting sleeve 52, and is fixed radially by an outer bolt 53.

[0099] Referring to Figure 2 and Figure 4 , during installation, the sleeve 49 and the sleeve ring 45 can be sleeved by the connecting sleeve 52, and the sleeve 49 and the sleeve ring 45 can be connected by the outer bolt 53.

[0100] The installation and disassembly of the inner container 41 and the outer container 42 are facilitated, which facilitates the reduction of the length of the equipment and the storage, and facilitates the replacement of the excessively worn inner container 41 and outer container 42.

Claims

1. A soil sampler for soil ecological environment detection work, comprising a frame (1), characterized in that: the frame (1) is erected on the ground by supporting feet for mounting and fixing other components; a sampling part (4) comprising an inner barrel (41) and an outer barrel (42) coaxially sleeved and relatively rotatable, the inner barrel (41) is connected with the outer barrel (42) by a torsion transmission connection through an elastic element (43); when the soil hardness changes to cause the torsion imbalance between the outer barrel (42) and the inner barrel (41), the two produce relative rotation; a telescopic part (2) mounted on the frame (1) for providing axial thrust for the sampling part (4); a driving part (3) mounted on the movable end of the telescopic part (2) and capable of moving axially along the frame (1) for driving the inner barrel (41) of the sampling part (4) to rotate, the driving part (3) comprising a housing (31) slidingly arranged on the frame (1); an adjusting part (6) comprising a movable gear (71) and a fixed gear (72) coaxially arranged, an axial reset spring (73) being rotatably arranged between the movable gear (71) and the fixed gear (72), the movable gear (71) moving synchronously with the inner barrel (41), the movable gear (71) being capable of axially displacing with the fixed gear (72); according to the deflection angle of the outer barrel (42) relative to the inner barrel (41), the depth of the movable gear (71) embeddable in the fixed gear (72) is adjusted to control the axial reciprocating distance of the inner barrel (41) in real time; the adjusting part (6) comprising, a fixed ring (61) fixed in the housing (31), a stepped limiting groove (611) being formed in the inner wall of the fixed ring (61); a movable ring (62) rotatably arranged at the bottom of the movable gear (71), a limiting block (621) being fixedly arranged on the sidewall of the movable ring (62), the limiting block (621) being slidingly arranged in the limiting groove (611); a movable roller shaft group (63) being provided in several groups, the number of the movable roller shaft group (63) being the same as the number of the stepped horizontal planes of the limiting groove (611), the movable roller shaft group (63) being slidingly arranged in the fixed ring (61) and being capable of extending into the stepped horizontal planes of the limiting groove (611); a spring rod (64) mounted on the movable roller shaft group (63) for adjusting the rotational resistance of the limiting block (621); a fixed roller shaft group (65) fixed on the limiting block (621) and overlapping the movable roller shaft group (63) circumferentially.

2. The soil sampler according to claim 1, characterized in that: the driving part (3) further comprises, a driving motor (32) mounted in the housing (31), an output end of the driving motor (32) being connected with a speed regulator; a transmission part (34) rotating synchronously with the output end of the speed regulator; a transmission rod (35) slidingly arranged at the output end of the transmission part (34), the transmission part (34) driving the inner barrel (41) to synchronously rotate and axially reciprocate through the transmission rod (35). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A fixed tooth (72) is fixed on the shell (31), and a movable tooth (71) rotates synchronously with the transmission member (34) through a spline, the movable tooth (71) is fixed with a lifting ring (37) embedded in the transmission rod (35), and the movable tooth (71) drives the transmission rod (35) to axially displace through the lifting ring (37); the adjacent end faces of the fixed tooth (72) and the movable tooth (71) are provided with wave-shaped teeth, and the two are connected through a return spring (73); When the deflection angle of the outer barrel (42) relative to the inner barrel (41) changes, the embedding depth of the movable tooth (71) in the fixed tooth (72) changes, the axial movement stroke of the transmission rod (35) changes, so as to realize the adjustment of the axial reciprocating stroke of the inner barrel (41).

3. The soil sampler for soil ecological environment detection work according to claim 1, wherein: The adjusting part (6) further comprises, A pressing plate (66) is axially slidably arranged in the fixed ring (61) and used for pressing the spring rod (64) to adjust the pre-tightening force of the spring rod (64); An adjusting sleeve (67) is rotatably arranged outside the fixed ring (61), the inner side end of the adjusting sleeve (67) is threadedly connected with the pressing plate (66), and the adjusting sleeve (67) is used for driving the pressing plate (66) to axially move relative to the fixed ring (61).

4. The soil sampler for soil ecological environment detection work according to claim 1, wherein: The sampling part (4) further comprises, A shifting rod (44) is slidably connected with the transmission rod (35) through a spline; A sleeve ring (45) is rotatably arranged at the bottom of the fixed ring (61) and connected with the shifting rod (44) through an elastic member (43); An extension rod (48) is detachably connected between the transmission rod (35) and the inner barrel (41) and used for transmitting rotation and axial displacement; A sleeve pipe (49) connects the outer barrel (42) and the sleeve ring (45) to make the sleeve ring (45) rotate synchronously with the outer barrel (42).

5. The soil sampler for soil ecological environment detection work according to claim 1, wherein: An inner barrel (411) is arranged in the inner barrel (41), and the inner wall of the inner barrel (411) is flush with the inner wall of the bottom of the inner barrel (41); A sampling cutter head (412) is fixed to the bottom of the inner barrel (41), and a spiral chip removal groove (413) is arranged on the outer wall of the inner barrel (41); The bottom of the outer barrel (42) is provided with a chamfer for cutting the side wall of the sampling hole.

6. The soil sampler for soil ecological environment detection work according to claim 4, wherein: The top of the extension rod (48) is provided with a slot, the bottom of the transmission rod (35) is fixed with a connecting bolt (50) inserted into the slot, and the connecting bolt (50) is inserted into the slot and fixed radially through an inner bolt (51); The top of the sleeve pipe (49) is sleeved with the sleeve ring (45) through a connecting sleeve (52) and is fixed radially through an outer bolt (53).

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