A soil sampling device for highway engineering

Abstract

The present invention relates to the technical field of soil sampling, and in particular to a soil sampling device for highway engineering, which comprises a base tube, a sampling tube, at least one extended outer tube and an extended inner tube, wherein the base tube can move in the vertical direction; the extended outer tube is used to extend the total length of the base tube; the sampling tube is inserted inside the base tube, and can elastically move relative to the base tube in the vertical direction, and has a tendency to move upward in the vertical direction; the extended inner tube is used to extend the total length of the sampling tube; and the locking mechanism has a locking state and an unlocking state. When sampling or adding the extended outer tube, the locking mechanism is in a locking state and is used to lock the position of the sampling tube, so that sampling can be convenient; when adding the extended inner tube, the locking mechanism is in an unlocking state, so that the sampling tube can move upward in the vertical direction under the elastic action, so that the extended inner tube can automatically move to the bottom of the sampling tube to achieve extension, thereby avoiding taking out the soil sample during the sampling process and ensuring the continuity of the soil sample.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a soil sampling device for highway engineering. Background Art

[0002] Highway engineering refers to the work involving the entire process of investigation, measurement, design, construction, maintenance and management of highway structures; highway structures mainly include roadbed, pavement, bridges, culverts, tunnels, drainage systems, safety protection facilities, greening and traffic monitoring facilities, as well as houses, workshops and other service facilities used for construction, maintenance and monitoring.

[0003] Before carrying out a highway project, in order to ensure the quality of the project and prevent safety accidents, it is necessary to sample and test the soil; when sampling the soil, a sampling device is needed. In the related art, for example, Chinese patent CN221631026U discloses a highway engineering soil sampling device, which can drive the sampling tube and the sampling drill to perform sampling work through the cooperation of a driving motor, a threaded rod, a bidirectional motor, a sampling tube and a connecting block, thereby quickly completing the soil sampling work, and at the same time, the sampled soil can be quickly taken out of the sampling tube through a sampling plate, a fixing rod and a buffer spring, so as to reduce the workload of the staff.

[0004] Although the above-mentioned highway engineering soil sampling device can improve the efficiency of sampling to a certain extent, it is found in the actual sampling process that when drilling deeper soil layers through the highway engineering soil sampling device, due to the limited length of the sampling tube, each soil sample of a certain depth needs to be taken out and then more auxiliary rods are connected to sample deeper soil, which is not only time-consuming and labor-intensive, but also affects the continuity of the soil samples. Summary of the invention

[0005] Based on this, it is necessary to provide a soil sampling device for highway engineering to address the problems of time-consuming, labor-intensive and poor continuity of soil samples in the current highway engineering soil sampling process.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A soil sampling device for highway engineering, the soil sampling device for highway engineering comprising:

[0008] A base cylinder, wherein the base cylinder is movable in a vertical direction;

[0009] At least one extended outer cylinder, the extended outer cylinder is composed of two first arc-shaped plates that can be spliced ​​with each other, and is configured to be detachably connected to the base cylinder to extend the total length of the base cylinder;

[0010] A sampling cylinder, which is inserted into the base cylinder and can elastically move relative to the base cylinder in a vertical direction and has a tendency to move upward in the vertical direction, and is configured to sample soil;

[0011] At least one extended inner cylinder, the extended inner cylinder is composed of two second arc-shaped plates that can be spliced ​​with each other, and is configured to be inserted into the base cylinder from top to bottom and detachably connected to the bottom of the sampling cylinder to extend the total length of the sampling cylinder;

[0012] The locking mechanism is configured to have a locking state and an unlocking state. When sampling or installing the extended outer cylinder, the locking mechanism is in the locking state and is used to lock the position of the sampling cylinder; when installing the extended inner cylinder, the locking mechanism is in the unlocking state, so that the sampling cylinder can move upward in the vertical direction under the action of elasticity.

[0013] Further, the locking mechanism includes a plurality of first annular protrusions, a plurality of second annular protrusions and a plurality of clamping blocks, the plurality of first annular protrusions being fixed and axially evenly spaced on the inner circumferential wall of the extended inner cylinder; a part of the second annular protrusions being fixed and axially evenly spaced on the outer circumferential wall of the sampling cylinder, and another part of the second annular protrusions being fixed and axially evenly spaced on the outer circumferential wall of the extended inner cylinder, the second annular protrusions being able to form a stop fit with the first annular protrusions; the plurality of clamping blocks being divided into two groups, the two groups being symmetrical and respectively corresponding to the second arc-shaped plates, the clamping blocks in the same group being axially evenly spaced on the inner circumferential wall of the base cylinder, and being able to elastically slide along the radial direction of the base cylinder, and being able to form a stop fit with the second annular protrusions.

[0014] Furthermore, the locking mechanism further comprises a plurality of first elastic members, wherein the first elastic members and the clamping blocks are arranged in a one-to-one correspondence, and under the action of the first elastic members, the clamping blocks have a tendency to move towards the axial direction of the base tube.

[0015] Furthermore, the first elastic member includes a compression spring, and the compression spring is connected between the clamping block and the base cylinder.

[0016] Furthermore, the soil sampling device for highway engineering further comprises a second elastic member, under the action of which the sampling tube has a tendency to move upward in the vertical direction.

[0017] Furthermore, the second elastic member includes a tension spring, and the tension spring is connected between the base cylinder and the sampling cylinder.

[0018] Furthermore, the bottom of the base tube is configured as a conical structure, and the small opening is configured downward.

[0019] Furthermore, a scale is provided on the outer peripheral wall of the base tube, and the scale extends along the axial direction of the base tube.

[0020] Furthermore, the soil sampling device for highway engineering also includes a ruler, which is sleeved on the outside of the base tube and can slide along the axial direction of the base tube to move to the scale at a preset position.

[0021] Furthermore, the soil sampling device for highway engineering further comprises a driving member, and the driving member is configured to provide a driving force for the base tube to move downward in a vertical direction.

[0022] The beneficial effects of the present invention are:

[0023] When in use, the soil sampling device for highway engineering provided by the present invention first places the base tube vertically on the ground, then drives the base tube to move downward in the vertical direction, so as to synchronously drive the sampling tube to be inserted into the ground, and soil simultaneously enters the interior of the sampling tube for sampling; when the sampling tube is completely immersed in the ground, the extended inner tube is put into the interior of the base tube, and the extended inner tube can move from top to bottom under the action of its own weight and vibration, and drives the locking mechanism to switch from a locked state to an unlocked state, so that on the one hand, the sampling tube can move upward in the vertical direction under the action of elasticity, and on the other hand, the extended inner tube can move to the bottom of the sampling tube to achieve extension; then the extended outer tube is connected to the base tube to achieve extension; then the base tube is continued to be driven to move downward in the vertical direction, and soil simultaneously enters the interior of the extended inner tube for sampling, thereby avoiding taking out of the soil sample during the sampling process, and ensuring the continuity and integrity of the soil sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic front view of the structure of a soil sampling device for highway engineering without an extended outer cylinder and an extended inner cylinder provided in one embodiment of the present invention;

[0025] Figure 2 for Figure 1 A side view structural schematic diagram of;

[0026] Figure 3 for Figure 2 Middle AA section view;

[0027] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at B in the middle;

[0028] Figure 5 A schematic front view of the structure of a soil sampling device for highway engineering provided by an embodiment of the present invention, which is equipped with an extended outer cylinder and an extended inner cylinder;

[0029] Figure 6 for Figure 5A side view structural schematic diagram of;

[0030] Figure 7 for Figure 6 Middle CC section view;

[0031] Figure 8 for Figure 7 The schematic diagram of the local enlarged structure at D in the middle;

[0032] Fig. 9 A schematic cross-sectional view of a soil sampling device for highway engineering provided by an embodiment of the present invention when an extended inner cylinder is installed;

[0033] Fig.10 A schematic diagram of the three-dimensional structure of an impact joint of a soil sampling device for highway engineering provided by one embodiment of the present invention.

[0034] in:

[0035] 1. Base cylinder; 11. Impact joint; 12. First sub-cylinder; 13. Second sub-cylinder;

[0036] 2. Lengthen the outer cylinder;

[0037] 3. Sampling tube; 31. Connecting rod; 32. Tension spring;

[0038] 4. Lengthened inner cylinder; 41. First annular convex;

[0039] 5. Locking mechanism; 51. Second annular protrusion; 52. Block; 521. First arc surface; 522. Second arc surface; 53. Compression spring;

[0040] 6. Gasoline main engine. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] like Figures 1 to 10 As shown, a soil sampling device for highway engineering provided by an embodiment of the present invention is used for soil sampling, and is configured to include a base tube 1, a sampling tube 3, a locking mechanism 5, at least one extended outer tube 2 and at least one extended inner tube 4, wherein the base tube 1 can move in the vertical direction; the extended outer tube 2 is composed of two first arc-shaped plates that can be spliced ​​with each other, and is configured to be detachably connected to the base tube 1 to extend the total length of the base tube 1; the sampling tube 3 is inserted into the base tube 1, and can elastically move relative to the base tube 1 in the vertical direction, and has a tendency to move upward in the vertical direction, sampling. The sampling tube 3 is configured to be able to sample soil; the extended inner tube 4 is composed of two second arc-shaped plates that can be spliced ​​with each other, and is configured to be inserted into the base tube 1 from top to bottom, and can be detachably connected to the bottom of the sampling tube 3 to extend the total length of the sampling tube 3; the locking mechanism 5 is configured to have a locked state and an unlocked state. When sampling or adding the extended outer tube 2, the locking mechanism 5 is in a locked state and is used to lock the position of the sampling tube 3; when adding the extended inner tube 4, the locking mechanism 5 is in an unlocked state, so that the sampling tube 3 can move upward in the vertical direction under the action of elasticity.

[0045] Specifically in this embodiment, before the extension outer cylinder 2 is installed, Figure 3As shown, the base cylinder 1 is configured to have an impact joint 11, a first sub-cylinder 12 and a second sub-cylinder 13 arranged in sequence from top to bottom, wherein Fig.10 As shown, a first recessed groove is provided on the outer peripheral wall of the bottom of the impact joint 11, an external thread is provided on the circumferential side wall of the first recessed groove, and an opening is provided at the top of the impact joint 11 to facilitate the placement of the second arc plate.

[0046] A second groove is provided on the inner circumferential wall of the top of the first sub-drum 12, and an internal thread is provided on the circumferential side wall of the second groove; a third groove is provided on the outer circumferential wall of the bottom of the first sub-drum 12, and an external thread is provided on the circumferential side wall of the third groove; a fourth groove is provided on the inner circumferential wall of the top of the second sub-drum 13, and an internal thread is provided on the circumferential side wall of the fourth groove; when installing, the first sub-drum 12 is arranged so that the top end thread is sleeved on the bottom of the impact joint 11, and the bottom end thread is inserted into the top of the second sub-drum 13, and the bottom end of the second sub-drum 13 is suspended.

[0047] like Figure 7 As shown, a fourth groove is opened on the inner circumferential wall of the top of the extended outer cylinder 2, and an internal thread is arranged on the circumferential side wall of the fourth groove; a third groove is opened on the outer circumferential wall of the bottom of the extended outer cylinder 2, and an external thread is arranged on the circumferential side wall of the third groove; after the extended outer cylinder 2 and the extended inner cylinder 4 are installed, the top end thread of the extended outer cylinder 2 is sleeved on the bottom of the first sub-cylinder 12, and the bottom end thread is inserted into the top of the second sub-cylinder 13, and the bottom end of the second sub-cylinder 13 is suspended, and the top end of the extended inner cylinder 4 is sleeved on the bottom of the sampling cylinder 3, and the bottom end is suspended.

[0048] More specifically, in order to facilitate the fixation of the extended outer cylinder 2, an external thread is provided on the outer peripheral wall at the top of the extended outer cylinder 2; the soil sampling device for highway engineering is configured to also include a first nut, which is configured to be threadedly sleeved on the top of the extended outer cylinder 2 when in use to fix the two first arc-shaped plates.

[0049] During use, the base tube 1 is first placed vertically on the ground, and then the base tube 1 is driven to move downward in the vertical direction to synchronously drive the sampling tube 3 to be inserted into the ground, and the soil simultaneously enters the sampling tube 3 for sampling.

[0050] When the sampling tube 3 is completely immersed in the ground, the two second arc-shaped plates are simultaneously put into the base tube 1. Under the action of its own weight and vibration, the extended inner tube 4 can move from top to bottom, and drive the locking mechanism 5 to switch from a locked state to an unlocked state. On the one hand, the sampling tube 3 can move upward in the vertical direction under the action of elasticity, and on the other hand, the extended inner tube 4 can move to the bottom of the sampling tube 3 to achieve lengthening.

[0051] Then unscrew the first sub-tube 12 and the second sub-tube 13, and clamp the bottom of the first sub-tube 12 and the top of the second sub-tube 13 with two first arc plates respectively, and then tighten the first nut to connect the extended outer tube 2 to the base tube 1 to achieve extension.

[0052] Then the base cylinder 1 is driven to move downward in the vertical direction, and the soil simultaneously enters the interior of the extended inner cylinder 4 for sampling.

[0053] The above process is repeated until the bottom of the lowest extended inner cylinder 4 reaches the preset depth, thereby avoiding taking out the soil sample during the sampling process and ensuring the continuity and integrity of the soil sample.

[0054] In some embodiments, the locking mechanism 5 is configured to include a plurality of first annular protrusions 41, a plurality of second annular protrusions 51 and a plurality of clamping blocks 52, wherein the plurality of first annular protrusions 41 are fixed and axially evenly spaced on the inner circumferential wall of the extended inner tube 4; a portion of the second annular protrusions 51 are fixed and axially evenly spaced on the outer circumferential wall of the sampling tube 3, and another portion of the second annular protrusions 51 are fixed and axially evenly spaced on the outer circumferential wall of the extended inner tube 4, and the second annular protrusions 51 can form a stop fit with the first annular protrusions 41; the plurality of clamping blocks 52 are divided into two groups, the two groups are symmetrical and respectively arranged corresponding to the second arc plate, the clamping blocks 52 of the same group are axially evenly spaced on the inner circumferential wall of the base tube 1, and can elastically slide along the radial direction of the base tube 1, and can form a stop fit with the second annular protrusion 51.

[0055] Specifically in this embodiment, Figure 7 and Figure 8 As shown, the first annular protrusion 41 is set as an annular cone structure, and the large mouth is set downward, and a fifth sink groove is set on the inner circumferential wall of the top of the elongated inner tube 4. The first annular protrusion 41 is set on the circumferential side wall of the fifth sink groove during installation; Figure 3 and Figure 4 As shown, the second annular protrusion 51 is set as an annular cone structure, and the large mouth is set upward. A sixth sink groove is set on the outer peripheral wall of the bottom of the sampling tube 3. The second annular protrusion 51 on the sampling tube 3 is set on the circumferential side wall of the sixth sink groove during installation. Figure 7As shown, a sixth groove is provided on the outer peripheral wall of the bottom of the extended inner cylinder 4, and the first annular protrusion 41 on the extended inner cylinder 4 is provided on the circumferential side wall of the sixth groove during installation; the clamping block 52 is provided as a T-shaped structure, and a first arc surface 521 is obliquely provided at the top of the left end of the clamping block 52, and a second arc surface 522 is obliquely provided at the bottom of the left end of the clamping block 52, and the inclination angle of the first arc surface 521 is greater than that of the second arc surface 522. On the one hand, when the second annular protrusion 51 and the first arc surface 521 cooperate, the clamping block 52 can be driven to retract under the action of a small external force to avoid affecting the normal falling of the extended inner cylinder 4. On the other hand, when the second annular protrusion 51 and the second arc surface 522 cooperate, the clamping block 52 can be driven to retract only under the action of a large external force, thereby avoiding the clamping block 52 being driven to retract due to a small disturbance during the sampling process, thereby avoiding affecting the normal sampling of the sampling cylinder 3.

[0056] More specifically, to facilitate installation of the card block 52, as Figure 4 As shown, a plurality of mounting grooves are provided on the inner peripheral wall of the bottom of the second sub-tube 13 , and the plurality of mounting grooves are arranged on the inner peripheral wall of the second sub-tube 13 at equal intervals along the axial direction.

[0057] During use, if Figure 4 As shown, before the extended inner cylinder 4 is installed, the locking mechanism 5 is in a locked state, and the top surface of the second annular protrusion 51 on the sampling cylinder 3 and the second curved surface 522 of the block 52 are stopped, so that the sampling cylinder 3 cannot move upward in the vertical direction under the action of elasticity, thereby ensuring that the sampling cylinder 3 can sample normally; when the extended inner cylinder 4 is installed, under the pushing action of the bottom of the second curved plate, the block 52 can be retracted into the installation groove from top to bottom in sequence, so that the locking mechanism 5 can be switched from the locked state to the unlocked state, thereby, on the one hand, the sampling cylinder 3 can move upward in the vertical direction under the action of elasticity, and on the other hand, the extended inner cylinder 4 can be moved to the bottom of the sampling cylinder 3 to achieve lengthening.

[0058] When the extended inner cylinder 4 moves to the bottom of the sampling cylinder 3, the two second arc plates can close together under the pushing action of the clamping block 52, and drive the first annular protrusion 41 and the corresponding second annular protrusion 51 to engage, thereby fixing the position of the extended inner cylinder 4; at this time, the sampling cylinder 3 has a tendency to move upward under the elastic action, on the one hand, the two second arc plates have a tendency to approach each other under the cooperation of the stopper between the second annular protrusion 51 and the first annular protrusion 41, and on the other hand, the two second arc plates have a tendency to approach each other under the cooperation of the stopper between the second annular protrusion 51 and the second arc surface 522 of the clamping block 52, thereby further strengthening the connection stability between the two second arc plates, avoiding the opening of the extended inner cylinder 4 during sampling, and making the obtained soil sample more compact.

[0059] In a further embodiment, in order to facilitate the provision of driving force for the elastic sliding of the block 52, the locking mechanism 5 is configured to also include multiple first elastic members, and the first elastic members and the block 52 are arranged in a one-to-one correspondence. Under the action of the first elastic members, the block 52 has a tendency to move toward the axial direction close to the base tube 1.

[0060] Specifically in this embodiment, the first elastic member is configured to include a compression spring 53. Taking one compression spring 53 as an example, Figure 4 As shown, the compression spring 53 is arranged to be placed horizontally during installation and is sleeved on the right end of the block 52. The left end of the compression spring 53 abuts against the block 52, and the right end abuts against the second sub-tube 13. Under the action of the compression spring 53, the block 52 has a tendency to extend out of the installation slot.

[0061] In a further embodiment, in order to improve the transmission stability between the block 52 and the second annular protrusion 51, the number of blocks 52 can be set to multiple groups, each group includes multiple blocks 52, and the multiple blocks 52 in the same group are arranged along the axial direction of the base tube 1, and the blocks 52 in different groups are evenly arranged along the circumferential direction.

[0062] When in use, different groups of multiple clamping blocks 52 located in the same circle can cooperate with the same second annular protrusion 51 at the same time, thereby facilitating the improvement of the transmission stability between the clamping blocks 52 and the second annular protrusion 51 .

[0063] In other embodiments, the soil sampling device for highway engineering is configured to further include a second elastic member, and under the action of the second elastic member, the sampling tube 3 has a tendency to move upward in the vertical direction.

[0064] Specifically in this embodiment, the second elastic member is configured to include a tension spring 32, which is connected between the base tube 1 and the sampling tube 3; to facilitate the connection of the tension spring 32, the soil sampling device for highway engineering is configured to also include a connecting rod 31, and the tension spring 32 is configured to be connected to the impact joint 11 at the top end and connected to the top of the connecting rod 31 at the bottom end during installation, and the bottom thread of the connecting rod 31 is inserted into the top of the sampling tube 3.

[0065] In a further embodiment, in order to better guide the movement of the second curved plate, as Figure 3 As shown, a conical portion is fixedly sleeved on the connecting rod 31, the small end of the conical portion is arranged upward, and the large end abuts against the top of the sampling tube 3, so that when in use, the second arc plate can move outward under the guidance of the conical surface of the conical portion to avoid movement interference.

[0066] In other embodiments, in order to improve the efficiency of the base tube 1 when drilling the ground and prevent soil from entering between the base tube 1 and the outer tube, the bottom of the base tube 1 is set to a conical structure with the small opening facing downward.

[0067] Specifically in this embodiment, Figure 3As shown, the bottom of the second sub-tube 13 is configured as a conical structure, and the small opening is configured downward.

[0068] In other embodiments, a scale is provided on the outer peripheral wall of the base tube 1, and the scale extends along the axial direction of the base tube 1, so that when sampling, it is convenient for the user to judge the insertion depth of the base tube 1, so as to accurately obtain the soil at the target depth and improve the accuracy of sampling.

[0069] In a further embodiment, the soil sampling device for highway engineering is configured to also include a ruler, which is sleeved on the outside of the base tube 1 and can slide along the axial direction of the base tube 1 to move to a scale at a preset position; when in use, the ruler can be slid to the target scale line, and then the base tube 1 can be deeply inserted into the soil, so that the user can more accurately judge the insertion depth of the base tube 1, thereby obtaining soil with a more accurate depth, further improving the accuracy of sampling.

[0070] In other embodiments, the soil sampling device for highway engineering is configured to further include a driving member, and the driving member is configured to provide a driving force for the base tube 1 to move downward in a vertical direction.

[0071] Specifically in this embodiment, the driving member can be configured to include a gasoline main engine 6, which has an output shaft that can slide up and down in the vertical direction. When in use, the output shaft pushes on the top of the impact joint 11, so as to drive the base tube 1 to move downward in the vertical direction by continuously hitting the impact joint 11.

[0072] In other embodiments, in order to facilitate the convenience of subsequent soil sample removal, the second sub-cylinder 13 is configured to be composed of two third arc-shaped plates that can be spliced ​​with each other; in order to facilitate the fixation of the second sub-cylinder 13, external threads are provided on the top and bottom outer peripheral walls of the second sub-cylinder 13, and the soil sampling device for highway engineering is configured to also include two second nuts, which are configured to be threadedly sleeved on the top and bottom of the second sub-cylinder 13 respectively when in use, so as to fix the two third arc-shaped plates.

[0073] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0074] First, place the base tube 1 vertically on the ground, then move the ruler to a position flush with the top of the sampling tube 3, and then start the gasoline main engine 6. The gasoline main engine 6 drives the base tube 1 to move downward in the vertical direction by continuously hitting the impact joint 11, so as to synchronously drive the sampling tube 3 to be inserted into the ground, and the soil simultaneously enters the sampling tube 3 for sampling; at this time, the top surface of the second annular convex 51 on the sampling tube 3 and the second arc surface 522 of the block 52 stop the sampling tube 3, so that the sampling tube 3 cannot move upward in the vertical direction under the pull of the tension spring 32, thereby ensuring that the sampling tube 3 can sample normally.

[0075] When the scale touches the ground, the two second arc plates are simultaneously put into the base tube 1. Under the action of their own weight and vibration, the second arc plates can move from top to bottom. Under the pushing action of the bottom of the second arc plates, the blocks 52 can be retracted into the mounting grooves from top to bottom in sequence, so that the locking mechanism 5 can be switched from a locked state to an unlocked state. On the one hand, the sampling tube 3 can be moved upward in the vertical direction under the pull of the tension spring 32, and on the other hand, the extended inner tube 4 can be moved to the bottom of the sampling tube 3 to achieve lengthening.

[0076] When the extended inner tube 4 moves to the bottom of the sampling tube 3, the two second arc plates can close together under the pushing action of the block 52, and drive the first annular protrusion 41 and the corresponding second annular protrusion 51 to engage, thereby fixing the position of the extended inner tube 4; at this time, the sampling tube 3 has a tendency to move upward under the pulling of the tension spring 32. On the one hand, the two second arc plates have a tendency to approach each other under the cooperation of the stopper between the second annular protrusion 51 and the first annular protrusion 41. On the other hand, the two second arc plates have a tendency to approach each other under the cooperation of the stopper between the second annular protrusion 51 and the second arc surface 522 of the block 52, thereby further strengthening the connection stability between the two second arc plates, avoiding the opening of the extended inner tube 4 during sampling, and making the obtained soil sample more compact.

[0077] Then turn off the gasoline main engine 6, unscrew the first sub-cylinder 12 and the second sub-cylinder 13, and clamp the bottom of the first sub-cylinder 12 and the top of the second sub-cylinder 13 with two first arc plates respectively, and then tighten the first nut to connect the extended outer cylinder 2 to the base cylinder 1 to achieve lengthening.

[0078] Then the gasoline main engine 6 is restarted, and the gasoline main engine 6 continues to drive the base cylinder 1 to move downward in the vertical direction, and the soil simultaneously enters the interior of the lengthened inner cylinder 4 for sampling.

[0079] The above process is repeated until the bottom of the lowest extended inner cylinder 4 reaches a preset depth.

[0080] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A soil sampling device for highway engineering, characterized in that: The highway engineering soil sampling device comprises: A base cylinder, wherein the base cylinder is movable in a vertical direction; At least one extended outer cylinder, the extended outer cylinder is composed of two first arc-shaped plates that can be spliced ​​with each other, and is configured to be detachably connected to the base cylinder to extend the total length of the base cylinder; A sampling cylinder, which is inserted into the base cylinder and can elastically move relative to the base cylinder in a vertical direction and has a tendency to move upward in the vertical direction, and is configured to sample soil; At least one extended inner cylinder, the extended inner cylinder is composed of two second arc-shaped plates that can be spliced ​​with each other, and is configured to be inserted into the base cylinder from top to bottom and detachably connected to the bottom of the sampling cylinder to extend the total length of the sampling cylinder; A locking mechanism, wherein the locking mechanism is configured to have a locking state and an unlocking state. When sampling or installing the extended outer cylinder, the locking mechanism is in the locking state and is used to lock the position of the sampling cylinder; when installing the extended inner cylinder, the locking mechanism is in the unlocking state, so that the sampling cylinder can move upward in the vertical direction under the action of elasticity; The locking mechanism includes a plurality of first annular protrusions, a plurality of second annular protrusions and a plurality of clamping blocks, wherein the plurality of first annular protrusions are fixed and axially evenly spaced on the inner circumferential wall of the elongated inner cylinder; a part of the second annular protrusions are fixed and axially evenly spaced on the outer circumferential wall of the sampling cylinder, and another part of the second annular protrusions are fixed and axially evenly spaced on the outer circumferential wall of the elongated inner cylinder, and the second annular protrusions can form a stop fit with the first annular protrusions; the plurality of clamping blocks are divided into two groups, the two groups are symmetrical and respectively arranged corresponding to the second arc-shaped plates, the clamping blocks in the same group are axially evenly spaced on the inner circumferential wall of the base cylinder, and can elastically slide along the radial direction of the base cylinder, and can form a stop fit with the second annular protrusions.

2. The soil sampling device for highway engineering according to claim 1, characterized in that: The locking mechanism further comprises a plurality of first elastic members, wherein the first elastic members and the clamping blocks are arranged in a one-to-one correspondence, and under the action of the first elastic members, the clamping blocks have a tendency to move towards the axial direction of the base tube.

3. The soil sampling device for highway engineering according to claim 2, characterized in that: The first elastic member includes a compression spring, and the compression spring is connected between the clamping block and the base cylinder.

4. The soil sampling device for highway engineering according to claim 1, characterized in that: The soil sampling device for highway engineering further comprises a second elastic member, under the action of which the sampling tube has a tendency to move upward in a vertical direction.

5. The soil sampling device for highway engineering according to claim 4, characterized in that: The second elastic member includes a tension spring, and the tension spring is connected between the base cylinder and the sampling cylinder.

6. The soil sampling device for highway engineering according to claim 1, characterized in that: The bottom of the base tube is arranged in a conical structure, and the small opening is arranged downward.

7. The soil sampling device for highway engineering according to claim 1, characterized in that: The outer peripheral wall of the base tube is provided with scales, and the scales extend along the axial direction of the base tube.

8. The soil sampling device for highway engineering according to claim 7, characterized in that: The soil sampling device for highway engineering further comprises a ruler, which is sleeved on the outside of the base tube and can slide along the axial direction of the base tube to move to the scale at a preset position.

9. The soil sampling device for highway engineering according to claim 1, characterized in that: The soil sampling device for highway engineering further comprises a driving member, which is configured to provide a driving force for the base tube to move downward in a vertical direction.

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