Soil sample in-situ sampling device

Abstract

The utility model discloses an in-situ sampling device for a soil sample. The in-situ sampling device comprises a separated square cutting ring device, a supporting rod device, a cutting device and a driving device, when a soil sample is sampled, the separation type square cutting ring device enables the cutting ring and the soil sample to be separated more conveniently after the soil sample is sampled, disturbance to the soil sample is smaller, the supporting rod device increases the overall rigidity of the separation type square cutting ring, and the defect that the separation type square cutting ring is prone to deformation is overcome. The screw rod in the cutting device is matched with the screw on the cutting knife, so that the cutting ring can cut the soil sample more accurately and uniformly and hardly disturbs the soil sample, the driving device can continuously output increased force in a convenient and labor-saving manner and uniformly distribute the force to the cutting knife, and the sampling efficiency of the soil sample is greatly improved. The problems that in the soil sample sampling process, separation of the cutting ring and the soil sample easily disturbs the soil sample, vibration liquefaction of the soil sample and unevenness of the lower section of the soil sample are easily caused by hammering and cutting, and the sampling process is extremely time-consuming and labor-consuming are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of river dynamics, concretely relates to a soil sample in-situ sampling device. BACKGROUND

[0002] Silt starting flow velocity is the cornerstone of riverbed evolution and silt movement research, and can provide basis for river regulation, energy dissipation and erosion prevention design of water conservancy hub project, development of reservoir operation management scheme, etc. Silt starting flow velocity test is usually carried out in an indoor flume, and there is contact scour phenomenon caused by change of flume and test soil sample medium, which affects the judgment of starting state of the soil sample, therefore, obtaining soil sample with original structure integrity, low disturbance and large enough sampling area is the key to ensure the accuracy of test data.

[0003] The starting flow velocity parameters determined by the test can truly and accurately reflect the characteristics of the regional soil layer only when the soil body is subjected to low external disturbance and the original structure in the natural state is not damaged. The sufficient soil sampling area can effectively reduce the adverse scouring effect when the test flume and the edge of the soil sample are in contact, and improve the stability and reliability of the test results. At present, the commonly used starting flow velocity test soil sample of undisturbed soil is usually collected by a small volume ring knife, and is made by splicing multiple small volume soil samples. The test soil sample has the following obvious deficiencies: (1) for high hardness soil body, the ring knife is knocked by artificial high frequency, which is easy to cause soil body jolt compaction and liquefaction; (2) the sampling device such as the ring knife is easy to produce extrusion and shearing effect on the soil body, especially the wet clay soil body, which causes problems such as crack, stratification, interface damage and pore water pressure mutation of the soil sample in the transfer process; (3) the starting flow velocity test soil sample made by splicing multiple small volume soil bodies has gaps or artificial filling soil bodies, which is easy to cause contact scour in the test soil sample, increase the error of starting flow velocity test parameters, and reduce the accuracy and repeatability of the data.

[0004] Therefore, in order to meet the strict requirements of the starting flow velocity test on the undisturbed soil sample with small disturbance and large area sampling, it is urgent to develop a new undisturbed soil sampling device. The device should have the characteristics of low invasiveness and low disturbance, and can maximize the maintenance of the natural water content, pore structure and other characteristics of the soil sample, so as to improve the accuracy and reliability of the detection data of the starting flow velocity and other parameters. SUMMARY

[0005] The utility model discloses a soil sample in-situ sampling device to overcome the above prior art's shortcomings, to meet the sampling of silt starting test undisturbed soil. It also provides a new device for obtaining undisturbed soil sample in other fields of geotechnical engineering investigation, environmental geological survey and agricultural soil analysis.

[0006] In order to solve the above technical problems, the utility model realizes the following technical scheme:

[0007] The soil sample in-situ sampling device comprises a square ring cutter device, a support rod device, a cutting device, and a driving device; the square ring cutter device is used for pressing into a soil sample; the support rod device is detachably supported on the inner wall of the square ring cutter device to support the square ring cutter device; the cutting device comprises a cutting knife and a cutting frame; the cutting frame is sleeved on the square ring cutter device; the cutting knife is movably arranged on the cutting frame; and the driving device is connected with the cutting knife to drive the cutting knife to move along the bottom of the square ring cutter device to cut the soil sample.

[0008] Further, the square ring cutter device comprises:

[0009] two ring cutter bodies, the two ring cutter bodies are oppositely arranged, each ring cutter body comprises a main body part and two extension parts respectively arranged at two ends of the main body part, and each extension part is provided with a connecting groove;

[0010] two T-shaped ring cutter walls, the two T-shaped ring cutter walls are oppositely arranged, each T-shaped ring cutter wall is connected with one end of two ring cutter bodies respectively, each T-shaped ring cutter wall comprises a body and two fixing parts arranged on two sides of the body, and each fixing part is fixed in a corresponding connecting groove.

[0011] Further, the support rod device comprises:

[0012] two support rods, the two support rods are hingedly connected through a middle hinge, and each support rod is provided with a support rod hinge base at two ends thereof;

[0013] two telescopic rods, the two telescopic rods are respectively arranged on opposite sides of the two support rods, each telescopic rod comprises two rod members and a telescopic knob, and the rod members are threadedly connected to the telescopic knob at end portions thereof; and each telescopic rod is provided with a telescopic rod hinge base at two ends thereof.

[0014] Further, the cutting frame comprises:

[0015] a cutting frame shell, comprising a shell and a support, the shell is used for sleeving on the square ring cutter, and the support is arranged on one side of the shell;

[0016] a transmission gear, rotatably arranged on the support, comprising an upper transmission gear and a lower transmission gear fixed coaxially;

[0017] a rotating rod, rotatably fixed to the support through a rotating rod fixing block, a gear is arranged in the middle of the rotating rod to mesh with the upper transmission gear, and rotating gears are arranged at two ends of the rotating rod respectively;

[0018] two screw rods, rotatably arranged on two sides of the cutting frame shell respectively, one end of each screw rod is meshed with a rotating gear, and the two screw rods are threadedly connected with the cutting knife;

[0019] A transmission rod has one end provided with a gear to engage with the lower transmission gear and the other end connected to the driving device to rotate under the driving of the driving device.

[0020] Further, the driving device comprises:

[0021] A fixed base;

[0022] A driving ring rotatably arranged in the fixed base;

[0023] A driving rod has one end fixedly connected with the driving ring to drive the driving ring to rotate;

[0024] A transmission gear is located in the driving ring and rigidly connected with the transmission rod;

[0025] A clamping key is hingedly arranged on the inner side of the driving ring;

[0026] A spring has two ends respectively abutting against the clamping key and the driving ring to elastically push the clamping key to abut against the transmission gear;

[0027] When the driving rod drives the driving ring to rotate forwardly, the spring drives the clamping key to clamp into the transmission gear to drive the transmission gear to rotate; when the driving rod drives the driving ring to rotate reversely, the driving ring drives the clamping key to rotate relative to the transmission gear.

[0028] Further, the cutting knife has a length and a width greater than those of the square ring knife, and the part of the cutting knife protruding from the square ring knife is provided with a nut to be threadedly connected with a screw rod.

[0029] Further, the circumference of the upper transmission gear is greater than that of the lower transmission gear.

[0030] Further, the inner dimension of the shell is the same as the outer dimension of the square ring knife, the shell is provided with triangular reinforcing members at four corners, and the shell is hollow in the middle.

[0031] Further, the ring knife body is provided with a ring knife handle at the top.

[0032] Further, the square ring knife is detachable.

[0033] Compared with the prior art, the utility model has the beneficial effects that:

[0034] The utility model discloses a square ring knife with the structure characteristics of separation, which makes the soil sample in the ring knife more convenient to take out in the soil sample box after sampling, avoids the damage to the integrity of the soil sample caused by the difficulty of separating the traditional ring knife from the soil sample.

[0035] The utility model discloses a cutting device's screw rod drives nut and then drives cutting knife along the vertical ring cutter direction to the soil sample even cutting, guarantees the integrity of soil sample, avoids manual hammering disturbance, and ensures that the cutting surface is even, solves the problem of soil sample vibration liquefaction and uneven cutting surface

[0036] The utility model discloses according to lever principle through pulling drive rod cooperation drive arrangement makes the process of the soil sample of the advance cutting plate cutting ring cutter more laborsaving and convenient, almost has no disturbance to the soil sample simultaneously, solves the problem of time -consuming and labor -saving of traditional manual need to use hammer to hammer cutting plate process.

[0037] In addition to the technical problems solved by the utility model, the technical features of the technical solutions and the advantages brought by these technical features, the other technical problems solved by the soil sample in-situ sampling device of the utility model, the other technical features included in the technical solutions and the advantages brought by these technical features will be further explained in detail in combination with the drawings BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is three -dimensional schematic view of separation formula square ring cutter device in the embodiment of the utility model;

[0039] Figure 2 It is three -dimensional schematic view of support rod device in the embodiment of the utility model;

[0040] Figure 3 It is three -dimensional schematic view of cutting knife in the embodiment of the utility model;

[0041] Figure 4 It is three -dimensional schematic view of cutting frame in the embodiment of the utility model;

[0042] Figure 5 It is three -dimensional schematic view of cutting frame in the embodiment of the utility model;

[0043] Figure 6 It is three -dimensional schematic view of cutting frame in the embodiment of the utility model;

[0044] Figure 7 It is three -dimensional schematic view of cutting frame in the embodiment of the utility model;

[0045] Figure 8 It is three -dimensional schematic view of cutting frame in the embodiment of the utility model;

[0046] Figure No. 101 - T-shaped ring knife wall; 102 - internal hexagonal fixing screw; 103 - fixing hole; 104 - fixing screw hole; 105 - connecting groove; 106 - ring knife handle; 107 - square ring knife; 108 - ring knife bottom; 201 - support rod; 202 - hinged base; 203 - rubber pad; 204 - hinged base; 205 - hinged hole; 206 - telescopic knob; 207 - telescopic rod; 301 - cutting knife; 302 - lower half of nut; 303 - upper half of nut; 304 - fixing screw; 305 - hinged hole of nut; 401 - protective shell; 402 - opening; 403 - upper transmission gear; 404 - fixing bearing; 405 - transmission rod; 406 - rotating rod fixing block; 407 - rotating rod fixing bearing; 408 - rotating rod; 409 - rotating gear; 410 - screw rod; 411 - driving rod; 412 - cutting frame rigid support; 413 - cutting frame shell; 414 - shell bearing; 415 - lower transmission gear; 416 - driving ring; 417 - spring; 418 - key; 419 - transmission gear; 420 - fixing base. DETAILED DESCRIPTION

[0047] The in-situ soil sampling device of the present embodiment is shown in Figures 1-8 Fig. 1, which mainly consists of a square ring knife device, a support rod device, a cutting device, and a driving device. The square ring knife device is used to press into the soil sample, the support rod device is detachably supported on the inner wall of the square ring knife device to support the square ring knife device, the cutting device includes a cutting knife and a cutting frame, the cutting frame is sleeved on the square ring knife device, the cutting knife is movably arranged on the cutting frame, and the driving device is connected to the cutting knife to drive the cutting knife to move along the bottom of the square ring knife device to cut the soil sample.

[0048] In at least one embodiment, the square ring knife device adopts a detachable square ring knife device. The square ring knife device can be detached and separated to facilitate sampling.

[0049] The detachable square ring knife device includes:

[0050] The ring knife handle 106 is rigidly connected to the top of the square ring knife 107 and the main body part of the ring knife;

[0051] The T-shaped ring knife wall 101 has a protrusion on the side wall surface, which matches the connecting groove 105 of the main body of the ring knife,

[0052] The T-shaped ring knife wall 101 has a fixing hole 103 reserved thereon, the fixing hole 103 is aligned with the fixing screw hole 104 after the T-shaped ring knife wall 101 is inserted into the ring knife, and the internal hexagonal fixing screw 102 is tightened to fix the whole ring knife;

[0053] The main body of the ring knife and the lower edge 108 of the T-shaped ring knife wall are sharpened.

[0054] The support rod device comprises:

[0055] a support rod 201, two support rods are hinged through a hinge 205 at the center;

[0056] a telescopic rod 207 located on both sides of the support rod 201, the telescopic rod 207 is composed of two rod members with similar sizes and a telescopic knob 206, and one end of the telescopic rod close to each other has a helical thread matched with the telescopic knob 206;

[0057] a hinge base, a support rod hinge base 202 is located at the end of the support rod and is hinged with the support rod 201; a telescopic rod hinge base 204 is located at the end of the telescopic rod and is hinged with the telescopic rod 207; a rubber pad 203 is bonded outside the hinge base.

[0058] The cutting device comprises a cutting knife and a cutting frame.

[0059] The cutting knife comprises:

[0060] a cutting knife 301 located at the lower part of the detachable square ring knife, the length of the cutting knife is slightly longer than that of the detachable square ring knife, and the width of the cutting knife is slightly wider than that of the detachable square ring knife; the parts protruding out of the cutting knife on both sides are symmetrically and rigidly connected with the lower half of the nut 302;

[0061] The nut is divided into a nut upper half 303 and a nut lower half 302, the nut upper half can be rotated to be opened around the nut hinge 305, and a fixing screw 304 is arranged at one end of the nut; the circular inner wall of the nut upper half 303 and the nut lower half 302 is embedded with threads.

[0062] The cutting knife is sharpened on the front side 306.

[0063] The cutting frame comprises:

[0064] a protective shell 401 located on the left side of the device, the shell has a reserved hole for the rotation of the driving rod;

[0065] a cutting frame shell 413 rigidly connected with the cutting frame rigid support 412 as a whole, the right side shell 413 has the same size as the outer size of the detachable square ring knife 107, the four corners of the shell are triangular, and the middle is hollow;

[0066] a transmission gear rigidly connected by an upper transmission gear 403 and a lower transmission gear 415, fixed through a fixed bearing 404, the fixed bearing 404 is connected with the shell 401 and the base; the transmission gear is connected with the rotating rod 408 and the transmission rod 405 through a gear structure;

[0067] a rotating rod 408, the rotating rod has rotating gears 409 on both sides, the rotating rod is fixed through a rotating rod fixing block 406, and the rotating rod fixing block 406 is connected with the rotating rod 408 through a rotating rod fixing bearing 407;

[0068] Screw rod 410, located on both sides of the entire cutting device, is fixed by fixing block and shell bearing 414, screw rod 410 has threads, and the thread parameters match the threads of the screw cap on cutting knife 301;

[0069] The driving device comprises:

[0070] Driving ring 416 is rigidly connected with driving rod 411; driving ring 416 has two clamping keys 418 inside; clamping key 418 is hinged with driving ring 416, and spring 417 is installed between the two;

[0071] Transmission gear 419 is located inside driving ring 416, is rigidly connected with transmission rod 405, and has fixed base 420 installed on both sides, and bearing is arranged in fixed base.

[0072] When the soil sample in-situ sampling device is used: the split square ring knife is assembled, the two T-shaped ring knife walls 101 are inserted into the connecting grooves 105 of the square ring knife 107 along the side protrusions, and the internal hexagonal fixing screws 102 are screwed and fixed through the fixing holes 103 and the fixing screw holes 104.

[0073] The support frame device is placed in the internal hollow position from the top of the square ring knife 107, the telescopic knob 206 is adjusted to make the telescopic rod 207 elongate, the support rod 201 is pushed to elongate, the hinged base 202 at the four corners of the support rod 201 is gradually tightened, and the middle rubber pad 203 makes the stress more uniform.

[0074] The assembled and supported square ring knife 107 is placed in the area to be sampled, gravity is applied on the ring knife to drive the square ring knife 107 into the soil sample, when the remaining depth of the ring knife is half, the support device is timely taken out along the top hollow, and then gravity is continuously applied to drive the square ring knife 107 into the soil sample.

[0075] The soil sample around the square ring knife 107 is removed, the cutting device is installed, the cutting frame shell 413 is sleeved on the square ring knife 107, and it is ensured that the four corners are in close contact with the square ring knife 107.

[0076] The fixed screw 304 is opened to open the upper half 303 of the screw cap of the cutting knife 301, the cutting knife 301 is installed at the bottom of the cutting device after the direction is confirmed, and the upper half 303 of the screw cap is closed and the fixed screw 304 is tightened after the position is confirmed.

[0077] The driving rod 411 is continuously pulled by hand to drive the transmission rod 405 to rotate, and the transmission rod 405 drives the transmission gear 419 to rotate. Figure 6For example, when the drive rod 411 rotates to the right, the drive rod 411 drives the card key 418 to rotate to the right, and due to the arrangement of the spring 417 and the shape of the transmission gear 419, the card key 418 will press the spring 417 and rotate to the right to the next groove, and the transmission gear 419 will not rotate with the drive rod 411; when the drive rod 411 rotates to the left, the card key 418 is engaged with the transmission gear 419, and the drive rod 411 drives the card key 418 to drive the transmission gear 419 to rotate to the left.

[0078] The transmission gear 419 transmits force to the upper transmission gear 403 through the transmission rod 405 and the end gear, and expands the force to the lower transmission gear 415 through lever action, and the lower transmission gear 415 drives the screw rod 410 on both sides of the cutting device to rotate continuously through the rotating rod 408.

[0079] The screw rod 410 rotates to cooperate with the nuts 303 and 304 to drive the cutting knives 301 to advance uniformly, and the cutting of the soil sample of the ring knife is completed.

[0080] After the soil sample is cut, the ring knife is placed in the soil sample box, the internal hexagonal fixing screw 102 is unscrewed, the T-shaped ring knife wall 101 is slowly pulled out vertically, and the remaining ring knife is slowly pulled out, so that the sampling of the soil sample is completed.

[0081] The embodiments not specifically described in the utility model are prior art or can be realized by prior art, and the specific implementation cases described in the utility model are only preferred implementation cases of the utility model, and are not used to limit the implementation scope of the utility model. Any equivalent changes and modifications made according to the content of the patent application scope of the utility model should be regarded as the technical scope of the utility model.

Claims

1. An in-situ soil sampling device, characterized by, The device comprises a square ring cutter device, a support rod device, a cutting device and a driving device; the square ring cutter device is used to press into the soil sample; the support rod device is detachably supported on the inner wall of the square ring cutter device to support the square ring cutter device; the cutting device comprises a cutting knife and a cutting frame; the cutting frame is sleeved on the square ring cutter device; the cutting knife is movably arranged on the cutting frame; the driving device is connected with the cutting knife to drive the cutting knife to move along the bottom of the square ring cutter device to cut the soil sample.

2. The soil sample in-situ sampling device according to claim 1, wherein the square ring cutter device comprises two ring cutter bodies arranged oppositely; each ring cutter body comprises a main body and two extension parts arranged at two ends of the main body respectively; each extension part is provided with a connecting groove; two T-shaped ring cutter walls are arranged oppositely; each T-shaped ring cutter wall is connected with one end of the two ring cutter bodies respectively; each T-shaped ring cutter wall comprises a body and two fixing parts arranged at two sides of the body respectively; each fixing part is fixed in the corresponding connecting groove. The support rod device comprises two support rods hinged through a middle hinge; each support rod is provided with a support rod hinge base at two ends thereof; two telescopic rods are arranged on opposite sides of the two support rods respectively; each telescopic rod comprises two rod members and a telescopic knob; the rod members are threadedly connected with the telescopic knob at the end portions thereof; each telescopic rod is provided with a telescopic rod hinge base at two ends thereof. The cutting frame comprises a cutting frame shell comprising a shell and a support; the shell is used to sleeve the square ring cutter; the support is arranged on one side of the shell; a transmission gear is rotatably arranged on the support; the transmission gear comprises a upper transmission gear and a lower transmission gear fixed coaxially; a rotating rod is rotatably fixed on the support through a rotating rod fixing block; the rotating rod is provided with a gear at the middle portion thereof to engage with the upper transmission gear; the rotating rod is provided with a rotating gear at two ends thereof; two screw rods are rotatably arranged on two sides of the cutting frame shell respectively; one end of each screw rod engages with one rotating gear respectively; the two screw rods are threadedly connected with the cutting knife; a transmission rod is provided with a gear at one end thereof to engage with the lower transmission gear; the other end of the transmission rod is connected with the driving device to rotate under the driving of the driving device. The driving device comprises a fixed base; a driving ring is rotatably arranged on the fixed base; a driving rod is fixedly connected with the driving ring at one end thereof to drive the driving ring to rotate; a transmission gear is located in the driving ring and is rigidly connected with the transmission rod; a clamping key is hinged on the inner side of the driving ring; an elastic member is arranged at two ends thereof to abut against the clamping key and the driving ring respectively to elastically push the clamping key to abut against the transmission gear; when the driving rod drives the driving ring to rotate forwardly, the elastic member drives the clamping key to engage into the transmission gear to drive the transmission gear to rotate; when the driving rod drives the driving ring to rotate reversely, the driving ring drives the clamping key to rotate relative to the transmission gear.

3. The soil sample in situ sampling device of claim 1, wherein, The cutting knife has a length and a width greater than those of the square ring cutter; the part of the cutting knife protruding from the square ring cutter is provided with a screw nut to be threadedly connected with the screw rod. ​ ​ 4. The soil sample in situ sampling device of claim 1, wherein, ​ ​ ​ ​ ​ ​ 5. The soil sample in situ sampling device of claim 4, wherein, ​ ​ ​ ​ ​ ​ ​ ​ 6. The soil sample in situ sampling device of claim 4, wherein, ​ 7. The soil sample in situ sampling device of claim 5, wherein, The circumference of the upper transmission gear is greater than the circumference of the lower transmission gear.

8. The soil sample in situ sampling device of claim 5, wherein, The housing has the same size as the square ring cutter, and the housing is provided with triangular reinforcing members at four corners and is hollow in the middle.

9. The soil sample in situ sampling device of claim 2, wherein, The ring cutter body is provided with a cutter handle at the top.

10. The soil sample in situ sampling device of claim 4, wherein, The square ring cutter is detachable.

Images