A continuous sampling device for soil and water conservation

Abstract

The present application discloses a soil and water conservation continuous sampling device, which relates to the technical field of sampling devices, and comprises an outer sampling rod, an inner sampling rod, a push rod, a soil breaking claw, a movable rod and a stopper; a vertical outer sampling cavity is arranged along the central axis direction in the outer sampling rod, and the bottom end of the outer sampling rod is open, so that the bottom end of the outer sampling cavity is connected with the outside; a plurality of earth-exiting channels are arranged inside the outer sampling rod, the lower end opening of the earth-exiting channels is connected with the outer sampling cavity, and the upper end opening is located at the top end of the outer sampling rod; the side wall of the inner sampling rod is slidably connected with the inner wall of the outer sampling cavity; the inner sampling rod is hollow inside and has an opening at the lower end, and the lower end of the inner sampling rod is connected with the soil breaking claw; the stopper is located inside the inner sampling rod, and the side wall of the stopper is slidably connected with the inner wall of the inner sampling rod; the top end of the inner sampling rod is fixedly connected with the bottom end of the push rod; it can achieve the technical effect that when sampling is performed, not too much soil of other depths will remain in the outer sampling cavity, and the sampling result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, and in particular to a soil and water conservation continuous sampling device. Background Art

[0002] Soil and water conservation is the work of preventing and controlling soil erosion, protecting, improving and rationally utilizing water and soil resources, and establishing a good ecological environment. In actual production and life, the water and soil in the area can be sampled to analyze the soil and water conservation situation in the area. When detecting the soil, the soil is usually sampled first, and then the sampled soil is tested and analyzed. At present, the most common soil sampling device is to insert the sampling tube deep into the soil to obtain soil samples, but this method makes the soil of different depths stored in the tube. It is not easy to take out the soil stored in the tube later, and it is easy to mix the soil of different depths together, which affects the test results of soil at different depths.

[0003] For example, a Chinese invention patent with authorization announcement number CN109000970B discloses a sampling mechanism capable of layered sampling of soil, comprising a first sampling rod, the outer diameter of the first sampling rod being gradually smaller from top to bottom, a first sampling cavity being provided inside the first sampling rod, the first sampling cavity being connected to the bottom end of the first sampling rod, a second sampling rod matching the first sampling cavity being provided inside the first sampling cavity, the second sampling rod being able to move inside the first sampling cavity, a second sampling cavity being provided inside the second sampling rod, the second sampling cavity being connected to the bottom end of the second sampling rod, a push rod being provided at the top end of the first sampling rod, the bottom end of the push rod being connected to the top end of the second sampling rod; when sampling soil, the push rod is used to extend the second sampling rod from the second sampling cavity, so that the second sampling cavity of the second sampling rod preferentially samples the upper layer of soil, and then the second sampling rod is retracted into the first sampling cavity, and the first sampling cavity of the first sampling rod is used to sample the lower layer of soil.

[0004] However, when the sampling mechanism is taking samples, relatively compact soil of other depths will remain in the first sampling cavity, and the second sampling rod will take away part of the soil remaining in the first sampling cavity when taking samples, resulting in inaccurate sampling results. Summary of the invention

[0005] The present application provides a continuous sampling device for soil and water conservation, which solves the technical problem in the prior art that when sampling, relatively dense soil of other depths will remain in the first sampling cavity, and the second sampling rod will take away part of the soil remaining in the first sampling cavity when sampling, resulting in inaccurate sampling results; and achieves the technical effect that when sampling, not too much soil of other depths will remain in the outer sampling cavity, and the sampling results will be more accurate.

[0006] The present application provides a soil and water conservation continuous sampling device, comprising an external sampling rod, an internal sampling rod, a push rod, a soil-breaking claw, a movable rod and a stopper; the external sampling rod as a whole is a truncated cone body with a larger upper portion and a smaller lower portion; a vertical external sampling cavity is arranged inside the external sampling rod along the central axis direction, the cross section of the external sampling cavity is a rhombus, and the bottom end of the external sampling rod is open, so that the bottom end of the external sampling cavity is connected with the outside world; the internal sampling rod and the soil-breaking claw are both located inside the external sampling cavity; a plurality of earth-excavation channels are opened inside the external sampling rod, the lower end opening of the earth-excavation channel is connected with the external sampling cavity, and the upper end opening is located at the top end of the external sampling rod; the internal sampling rod as a whole is a quadrangular prism, and the internal sampling cavity is a plurality of earth-excavation channels, the lower end opening of the earth-excavation channel is connected with the external sampling cavity, and the upper end opening is located at the top end of the external sampling rod; the internal sampling rod as a whole is a quadrangular prism, and the internal sampling cavity is a plurality of earth-excavation channels, and the lower end opening of the earth-excavation channel is connected with the external sampling cavity, and the upper end opening is located at the top end of the external sampling rod; the internal sampling rod as a whole is a quadrangular prism, and the internal sampling cavity is a plurality of earth-excavation channels, and the upper end opening of the external ... a plurality of earth-excavation channels, and the upper end opening of the external sampling cavity is a plurality of earth-excavation channels, The side wall of the rod is slidably connected to the inner wall of the outer sampling cavity; the inner sampling rod is hollow inside and open at the lower end, and the lower end of the inner sampling rod is connected to the soil-breaking claw; the stopper is located inside the inner sampling rod, and the stopper is a quadrangular prism as a whole, and the side wall of the stopper is slidably connected to the inner wall of the inner sampling rod; the top end of the inner sampling rod is fixedly connected to the bottom end of the push rod, and the push rod is a long straight rod arranged vertically as a whole, and the push rod passes through the outer sampling rod and extends to the top of the outer sampling rod; the interior of the push rod is penetrated along the central axis direction, and the outer wall of the movable rod is slidably connected to the inner wall of the push rod; the bottom end of the movable rod passes through the inner sampling rod and is fixedly connected to the top of the stopper, and the top end of the movable rod extends out of the push rod.

[0007] Furthermore, the diameter of the upper end face of the outer sampling rod is between 1.5 and 2 times the diameter of the lower end face; the sum of the cross-sectional areas of the multiple excavation paths is not less than the sum of the cross-sectional areas of the outer sampling cavity; the length of the inner sampling rod is one-third to one-half of the length of the outer sampling cavity; the length of the movable rod is greater than the sum of the lengths of the push rod and the inner sampling rod, and the length of the push rod is greater than the length of the outer sampling rod; when the top end of the inner sampling rod is in contact with the top end of the outer sampling cavity, the lower end opening of the excavation path is located below the inner sampling rod.

[0008] Furthermore, the middle opening area of ​​the earth-breaking claw is smaller than the cross-sectional area of ​​the inner sampling rod; the cross-sectional area of ​​the outer sampling cavity is square; a handle is fixed to the upper portion of the top side wall of the push rod to facilitate the control of the up and down movement of the push rod; the cross-sectional shape of the inner sampling rod is the same as the cross-sectional shape of the outer sampling cavity, and the cross-sectional shape of the block is the same as the cross-sectional shape of the inner sampling rod.

[0009] Furthermore, the soil-breaking claw includes four triangular claw blocks, which correspond to the four bottom edges of the bottom opening of the inner sampling rod. The triangular claw blocks are hinged to the corresponding bottom edges of the inner sampling rod through a spring-type hinge structure, and the triangular claw blocks can be close to or far above the central axis of the inner sampling rod when hinged, so that the soil-breaking claw as a whole can be in the shape of an inverted quadrangular pyramid when closed and in the shape of a claw when unfolded; in the initial state, the soil-breaking claw is in a closed state.

[0010] Furthermore, an inner magnet is provided on the inner wall of the outer sampling cavity, and the inner magnet is in the shape of a circular tube as a whole. The inner magnet is embedded in the inner wall of the outer sampling cavity, and the inner radius of the inner magnet is equal to the inner radius of the outer sampling cavity; the inner magnet is located below the excavation path; the spring-type hinged structure enables the earth-breaking claw to return to its original state after being unfolded under the action of the spring inside the spring-type hinged structure.

[0011] Furthermore, the push rod pushes the inner sampling rod to move downward, and when the soil breaking claw moves downward to the inside of the inner magnet, the soil breaking claw gradually expands under the magnetic force of the inner magnet, so that the inside of the inner sampling rod and the outer sampling cavity are connected. At this time, the inner sampling rod continues to move downward, so that the soil breaking claw expands to a greater extent, and the sample enters the inner sampling rod; the size of the space for storing the sample in the inner sampling rod is controlled by controlling the position of the stopper in the inner sampling rod; the push rod pulls the inner sampling rod upward, and when the soil breaking claw moves upward to be out of the range of the inner magnet, the soil breaking claw gradually returns to its original state under the action of the spring-type hinged structure.

[0012] Furthermore, it also includes multiple pull ropes; one end of the pull rope is evenly fixed on the bottom edge of the block, and the other end is fixed on the edge of the triangular claw block, and the number of pull ropes connected to the four triangular claw blocks is the same; the number of the pull ropes is not less than 12; in the initial state, when the soil-breaking claw is closed and the top of the block is in contact with the inner wall of the top of the inner sampling rod, the pull rope is in a taut state, so that during the sampling process, the opening and closing degree of the soil-breaking claw can be controlled by controlling the position of the block.

[0013] Furthermore, the pull cord includes a retractable cord and a magnetic cord, the number of the retractable cord and the magnetic cord are both multiple, and the retractable cord and the magnetic cord are cross-fixed and connected together; the number of the retractable cord and the magnetic cord on each pull cord is not less than three.

[0014] Furthermore, the interior of the magnetic rope is hollow, the interior of the magnetic rope is filled with magnetic fluid, and the material of the magnetic rope is nylon.

[0015] Furthermore, it is characterized in that the interior of the telescopic rope is hollow, the telescopic rope is an airbag structure, and the interior is filled with gas; the telescopic rope is made of elastic rubber, and the length of the telescopic rope becomes longer and the width becomes thinner after being pulled by external force, and the maximum length of the telescopic rope after being subjected to force is not greater than 1.5 times the length of the telescopic rope in the initial state.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0017] A continuous sampling device for soil and water conservation is provided, which includes an external sampling rod; a vertical external sampling cavity is arranged inside the external sampling rod along the central axis direction, and the bottom end of the external sampling rod is opened, so that the bottom end of the external sampling cavity is connected with the outside; a plurality of excavation channels are opened inside the external sampling rod, the lower end openings of the excavation channels are connected with the external sampling cavity, and the upper end openings are located at the top end of the external sampling rod; the technical problem in the prior art that relatively dense soil of other depths will remain in the first sampling cavity during sampling, and part of the soil retained in the first sampling cavity will be taken away by the second sampling rod during sampling, resulting in inaccurate sampling results is effectively solved; thereby achieving the technical effect that not too much soil of other depths will remain in the external sampling cavity during sampling, and the sampling results will be more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the soil and water conservation continuous sampling device of the present invention;

[0019] Figure 2 It is a bottom view schematic diagram of the outer sampling rod of the soil and water conservation continuous sampling device of the present invention;

[0020] Figure 3 It is a schematic diagram of the initial state of the soil breaking claw of the soil and water conservation continuous sampling device of the present invention;

[0021] Figure 4 It is a schematic diagram of the downward movement of the block of the soil and water conservation continuous sampling device of the present invention;

[0022] Figure 5 It is a schematic diagram of the block-assisted soil-breaking claw of the soil and water conservation continuous sampling device of the present invention when it is deployed;

[0023] Figure 6 It is a schematic diagram of the soil and water conservation continuous sampling device of the present invention when the internal magnet restricts the auxiliary soil breaking claw to unfold;

[0024] Figure 7 A schematic diagram of the pull rope position of the soil and water conservation continuous sampling device of the present invention;

[0025] Figure 8 It is a schematic diagram of the soil breaking claws being closed by pulling the pull rope of the soil and water conservation continuous sampling device of the present invention;

[0026] Fig. 9 This is a schematic diagram of the pull rope structure of the soil and water conservation continuous sampling device of the present invention;

[0027] Fig.10 This is a schematic diagram of the magnetic rope structure of the soil and water conservation continuous sampling device of the present invention;

[0028] Fig.11 It is a schematic diagram of the telescopic rope structure of the soil and water conservation continuous sampling device of the present invention.

[0029] In the figure:

[0030] The outer sampling rod 100 , the excavation channel 110 , the outer sampling cavity 120 , the inner magnet 130 , the inner sampling rod 200 , the push rod 300 , the handle 310 , the earth-breaking claw 400 , the movable rod 500 , the stopper 600 , the pull rope 700 , the telescopic rope 710 , and the magnetic rope 720 . DETAILED DESCRIPTION

[0031] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0032] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] Embodiment 1

[0035] like Figure 1 and Figure 2As shown, the soil and water conservation continuous sampling device of the present application comprises an outer sampling rod 100, an inner sampling rod 200, a push rod 300, a soil breaking claw 400, a movable rod 500 and a stopper 600; the outer sampling rod 100 is a truncated cone with a larger upper portion and a smaller lower portion, and the diameter of the upper end face of the outer sampling rod 100 is between 1.5 and 2 times the diameter of the lower end face; the length of the outer sampling rod 100 is 72 to 78 cm; a vertical outer sampling cavity 120 is provided in the outer sampling rod 100 along the central axis direction, the cross section of the outer sampling cavity 120 is a rhombus, and the bottom end of the outer sampling rod 100 is open, so that the bottom end of the outer sampling cavity 120 is connected to the outside; the inner sampling rod 200 and the soil breaking claw 400 are connected to the outer sampling cavity 120, and the outer sampling cavity 120 is connected to the outside; the inner sampling rod 200 and the soil breaking claw 400 are connected to the outer sampling cavity 120, and the outer sampling cavity 120 is connected to the outer sampling cavity 120. The soil claws 400 are all located inside the outer sampling cavity 120; a plurality of earth-excavating channels 110 are opened inside the outer sampling rod 100, the lower end opening of the earth-excavating channels 110 is connected to the outer sampling cavity 120, and the upper end opening is located at the top of the outer sampling rod 100; the sum of the cross-sectional areas of the plurality of earth-excavating channels 110 is not less than the sum of the cross-sectional areas of the outer sampling cavity 120; the inner sampling rod 200 is a quadrangular prism as a whole, and the cross-sectional shape of the inner sampling rod 200 is the same as the cross-sectional shape of the outer sampling cavity 120, so that the side wall of the inner sampling rod 200 and the inner wall of the outer sampling cavity 120 are slidably connected; the inner sampling rod 200 is hollow inside and has an opening at the lower end, and the lower end of the inner sampling rod 200 is The end is connected with the soil-breaking claw 400; the soil-breaking claw 400 is unfolded in a claw-like structure, so that the outer sampling cavity 120 and the inner sampling rod 200 are connected; the length of the inner sampling rod 200 is one-third to one-half of the length of the outer sampling cavity 120; the stopper 600 is located inside the inner sampling rod 200, the stopper 600 is a quadrangular prism as a whole, and the cross-sectional shape of the stopper 600 is the same as the cross-sectional shape of the inner sampling rod 200, so that the side wall of the stopper 600 and the inner wall of the inner sampling rod 200 are slidably connected; the top end of the inner sampling rod 200 is fixedly connected to the bottom end of the push rod 300, the push rod 300 is a vertically arranged long straight rod as a whole, and the push rod 300 passes through The outer sampling rod 100 extends to the top of the outer sampling rod 100; the interior of the push rod 300 is penetrated along the central axis direction, and the outer wall of the movable rod 500 is slidably connected to the inner wall of the push rod 300; the bottom end of the movable rod 500 passes through the inner sampling rod 200 and is fixedly connected to the top of the stopper 600, and the top end of the movable rod 500 extends out of the push rod 300; the length of the movable rod 500 is greater than the sum of the lengths of the push rod 300 and the inner sampling rod 200, and the length of the push rod 300 is greater than the length of the outer sampling rod 100; when the top end of the inner sampling rod 200 is in contact with the top end of the outer sampling cavity 120, the lower end opening of the excavation channel 110 is located below the inner sampling rod 200.

[0036] Preferably, the middle opening area of ​​the soil-breaking claw 400 is smaller than the cross-sectional area of ​​the inner sampling rod 200 .

[0037] Preferably, the cross section of the outer sampling cavity 120 is square.

[0038] Preferably, a handle 310 is fixed to the upper portion of the top side wall of the push rod 300 to facilitate controlling the push rod 300 to move up and down.

[0039] Preferably, since the top opening of the excavation channel 110 is located at the top of the outer sampling rod 100, this helps to reduce the friction between the soil and the inner wall of the outer sampling rod 100 during the sampling process, making the sampling smoother. Quantitatively speaking, the force required for inserting the sampling device with the excavation channel 110 into the soil may be 10% to 20% less than that of the device without the excavation channel 110; the provision of multiple excavation channels 110 ensures that the soil sample can enter the sampling cavity evenly from different positions, thereby improving the representativeness and uniformity of the sample. In terms of specific values, the uniformity of the soil sample obtained by the sampling device with the excavation channel 110 may be 15% to 25% higher than that of the device without the excavation channel 110.

[0040] like Figure 1 and Figure 2 As shown, when the soil and water conservation continuous sampling device of the embodiment of the present application is actually operated, the steps are as follows:

[0041] S1: First, push the movable rod 500 so that the stopper 600 abuts against the opening of the inner sampling rod 200, and the push rod 300 remains stationary;

[0042] S2: Then the outer sampling rod 100 is inserted into the soil, and the outer sampling rod 100 is forced to enter the soil to a certain depth by external force (pressing or hammering, etc.). At this time, the outer sampling cavity 120 contains the sample to be collected. When the outer sampling rod 100 moves downward, the stopper 600 abuts against the opening of the inner sampling rod 200 to prevent the soil in the outer sampling cavity 120 from entering the inner sampling rod 200.

[0043] S2: The push rod 300 is driven downward by the handle 310. At this time, the movable rod 500 can be controlled to be pressed downward (the pressing speed of the movable rod 500 is slower than the moving speed of the push rod 300), or the movable rod 500 can be controlled to be stationary, thereby controlling the volume of the sample taken out;

[0044] S3: After the sample is taken out, the inner sampling rod 200 is reset by pulling the push rod 300 and the movable rod 500, and then the outer sampling rod 100 is pulled out of the soil;

[0045] S4: Finally, the push rod 300 and the movable rod 500 are pushed to discharge the soil sample under the pressure of the stopper 600.

[0046] Preferably, a force sensor is used to measure the force required for the sampling device with and without the unearthed channel 110 to be inserted into the soil (the insertion depth into the soil is 60 cm, and the soil moisture is between 50% and 80%). The test simulation is performed multiple times to average the measured data to obtain the range of insertion force in each case. After the simulation, it is found that the device without the unearthed channel 110 requires a force of 90N to 120N to be inserted into the soil, and the device with the unearthed channel 110 requires an average force of 75N to 98N, and the force difference is between 10% and 20%.

[0047] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0048] 1. By providing the unearthed channel 110, part of the soil remaining in the external sampling cavity 120 can be pressed out along the unearthed channel 110, so that the sampled soil will not be mixed with the soil at other locations;

[0049] 2. By providing the soil-breaking claws 400, the soil in the external sampling cavity 120 can be broken open, so that the soil sample in the external sampling cavity 120 will not be compacted, and then squeezed out along the earth-exiting channel 110. The force required for inserting the sampling device with the earth-exiting channel 110 into the soil is reduced by 10% to 20% compared with the device without the earth-exiting channel 110;

[0050] 3. Improve the uniformity of soil samples obtained by the sampling device.

[0051] Embodiment 2

[0052] In the above embodiment, the soil breaking claws 400 may be closed due to the obstruction of the soil during sampling, resulting in unsuccessful sampling. The embodiment of the present application is optimized to a certain extent on the basis of the above embodiment.

[0053] like Figure 3 As shown, the soil-breaking claw 400 includes four triangular claw blocks, which correspond to the four bottom edges of the bottom opening of the inner sampling rod 200 one by one. The triangular claw blocks are hinged to the corresponding bottom edges of the inner sampling rod 200 through a spring-type hinge structure (not shown in the figure), and the triangular claw blocks can be close to or away from the central axis of the inner sampling rod 200 when hinged, so that the soil-breaking claw 400 as a whole can be in the shape of an inverted quadrangular pyramid when closed and in the shape of a claw when unfolded; in the initial state, the soil-breaking claw 400 is in a closed state. closed state; an inner magnet 130 is provided on the inner wall of the outer sampling cavity 120, the inner magnet 130 is in a cylindrical shape as a whole, the inner magnet 130 is embedded in the inner wall of the outer sampling cavity 120, and the inner radius of the inner magnet 130 is equal to the inner radius of the outer sampling cavity 120; the inner magnet 130 is located below the excavation road 11O; the spring-type hinged structure enables the earth-breaking claw 400 to return to its original state under the action of the internal spring of the spring-type hinged structure after being unfolded, which is a prior art and will not be repeated here.

[0054] like Figure 4 , Figure 5 and Figure 6 As shown, the push rod 300 pushes the inner sampling rod 200 to move downward, and when the soil breaking claw 400 moves downward to the inside of the inner magnet 130, the soil breaking claw 400 gradually expands under the magnetic force of the inner magnet 130, so that the inside of the inner sampling rod 200 and the outer sampling cavity 120 are connected. At this time, the inner sampling rod 200 continues to move downward, so that the soil breaking claw 400 is expanded to a greater extent, and the sample enters the inner sampling rod 200; the size of the space for storing the sample in the inner sampling rod 200 is controlled by controlling the position of the stopper 600 in the inner sampling rod 200; the push rod 300 pulls the inner sampling rod 200 to move upward, and when the soil breaking claw 400 moves upward to be out of the range of the inner magnet 130, the soil breaking claw 400 gradually returns to its original state under the action of the spring-type hinge structure.

[0055] Preferably, when the soil-breaking claw 400 is unfolded under the action of the inner magnet 130, it can grasp and cut the soil more effectively, so that more soil can enter the outer sampling cavity 120 and the inner sampling rod 200. A sampling device is provided with a soil-breaking claw 400 and can control the opening and closing; during the sampling process, the closed state of the soil-breaking claw 400 helps to prevent the soil sample that has entered the sampling cavity from falling during the lifting process; when the soil-breaking claw 400 moves up to the range of the inner magnet 130 and closes, it can close the bottom end of the inner sampling rod 200 to a certain extent, thereby reducing or avoiding the loss of samples during transportation. Further experimental simulation is carried out on the basis of Example 1, and the weight of the sample to be sampled at a single time is set to 500. grams, and the time required to pull the sampling device out of the soil each time is similar (15 seconds to 20 seconds). The weight of the sample after being pulled out of the sampling device without the closable soil-breaking claws 400 is 350 grams to 420 grams, and the sample loss rate in the process of retracting the sampling device is 16% to 30%; the weight of the sample after being pulled out of the sampling device with the closable soil-breaking claws 400 is 440 grams to 480 grams, and the sample loss rate in the process of retracting the sampling device is 4% to 12%; under comprehensive evaluation, the sampling device with the closable soil-breaking claws 400 has a soil sample loss rate that is 50% to 75% less during lifting and transportation than that of the device without the soil-breaking claws 400 or the soil-breaking claws 400 that cannot be closed.

[0056] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0057] 1. In the initial state, the soil-breaking claw 400 is closed into a quadrangular pyramid state, which has a better soil-breaking effect, and the unnecessary soil sample in the external sampling cavity 120 enters the soil-exiting channel 110 along the inclined surface of the soil-breaking claw 400;

[0058] 2. The inner magnet 130 and the soil breaking claw 400 are magnetically attracted to each other, so that the soil breaking claw 400 is unfolded under the magnetic attraction of the inner magnet 130, and it is difficult for the soil breaking claw 400 to close due to the obstruction of the soil during sampling, thereby ensuring smooth sampling;

[0059] 3. After the soil-breaking claw 400 is separated from the position of the inner magnet 130, it can gradually return to its original state, so that the sample inside the inner sampling rod 200 will not fall out too much. The sampling device provided with the soil-breaking claw 400 that can be closed has a soil sample loss rate that is 50% to 75% less during the lifting and transportation process than a device without the soil-breaking claw 400 or the soil-breaking claw 400 that cannot be closed.

[0060] Embodiment 3

[0061] In the above embodiment, if there are a large number of samples in the soil breaking claw 400 during sampling, it may not be possible to accurately reset it. During the upward movement of the inner sampling rod 200, a large amount of samples inside the inner sampling rod 200 will fall, resulting in a small amount of successfully sampled samples. The embodiment of the present application is optimized based on the above embodiment.

[0062] like Figure 7 and Figure 8 As shown, the soil and water conservation continuous sampling device of the present application also includes a plurality of pull ropes 700; one end of the pull rope 700 is evenly fixed to the bottom edge of the block 600, and the other end is fixed to the edge of the triangular claw block, and the number of pull ropes 700 connected to the four triangular claw blocks is the same; the number of the pull ropes 700 is not less than 12; in the initial state, when the soil-breaking claw 400 is closed and the top of the block 600 is in contact with the inner wall of the top of the inner sampling rod 200, the pull rope 700 is in a taut state, so that during the sampling process, the opening and closing degree of the soil-breaking claw 400 can be controlled by controlling the position of the block 600.

[0063] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0064] 1. By setting the pull rope 700, when the block 600 is away from the soil-breaking claw 400, the pull rope 700 pulls the soil-breaking claw 400 to close, and when the block 600 is close to the soil-breaking claw 400, the pull rope 700 is loosened, and the soil-breaking claw 400 can be normally unfolded. By connecting the block 600 and the triangular claw block with the pull rope 700, the opening and closing degree of the soil-breaking claw 400 can be more accurately controlled; quantitatively speaking, the sampling device provided with the pull rope 700 may have an accuracy of 1.5 to 2 times that of the previous solution in controlling the opening and closing of the soil-breaking claw 400, which means that in actual application, the operator can more finely adjust the opening and closing of the soil-breaking claw 400 to adapt to different soil conditions and sampling requirements;

[0065] 2. Through the multiple drawstrings 700, the sample can be cut and screened once by the multiple drawstrings 700 when entering the inner sampling rod 200, so that the sample and the sampling rod 200 will not be squeezed together, thus ensuring the integrity of the sampling;

[0066] 3. Multiple pull ropes 700 can intercept some larger stones and other foreign objects that may exist in the sample, ensuring the accuracy and effectiveness of sample sampling;

[0067] 4. The pull rope 700 is in a taut state in the initial state, which helps to enhance the connection stability between the earth-breaking claw 400 and the inner sampling rod 200. During the sampling process, this stability can avoid the possibility of the earth-breaking claw 400 being accidentally opened or closed.

[0068] Embodiment 4

[0069] In the above embodiment, when the pull rope 700 is in a relaxed state, the multiple pull ropes 700 will be moved away from each other under the greater pressure of the soil, and cannot effectively intercept larger foreign objects in the sample; the embodiment of the present application is optimized to a certain extent based on the above embodiment.

[0070] like Fig. 9 As shown, the pull rope 700 includes a retractable rope 710 and a magnetic rope 720. The number of the retractable rope 710 and the magnetic rope 720 are both multiple, and the retractable rope 710 and the magnetic rope 720 are cross-fixed and connected together; the number of the retractable rope 710 and the magnetic rope 720 on each pull rope 700 is not less than three.

[0071] like Fig.10 As shown, the magnetic rope 720 is hollow inside, is filled with magnetic fluid, and is made of nylon.

[0072] like Fig.11 As shown, the retractable rope 710 is hollow inside and is an airbag structure filled with gas. The retractable rope 710 is made of elastic rubber. When the retractable rope 710 is pulled by an external force, its length becomes longer and its width becomes thinner. Moreover, the maximum length of the retractable rope 710 after being subjected to force is no more than 1.5 times the length of the retractable rope 710 in the initial state.

[0073] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0074] 1. By setting a magnetic rope 720, the interior of the magnetic rope 720 is filled with magnetic fluid, and the magnetic ropes 720 on adjacent pull ropes 700 attract each other, so that the distance between the pull ropes 700 is small, which can intercept smaller foreign objects, and the soil sample can be quickly reset after being divided;

[0075] 2. The retractable rope 710 adopts an airbag structure design, which is filled with gas, so that the pull rope 700 can be stretched when pulled by external force, and return to its original state after the external force disappears. This stretching performance helps to prevent the soil-breaking claw 400 from accidentally closing or opening due to soil resistance or other external forces during the alkali-less sampling process. Quantitatively speaking, the retractable rope 710 can be stretched to within 1.5 times of the initial length after being stressed, thereby providing a larger telescopic range and better adaptability.

[0076] 3. The magnetic rope 720 is filled with magnetic fluid, which makes the adjacent magnetic ropes 720 have a certain mutual attraction. During the sampling process, this magnetic attraction helps the soil-breaking claw 400 to better fit the soil surface, improving the accuracy and stability of sampling, due to the magnetic attraction of the magnetic rope 720;

[0077] 4. The retractable rope 710 and the magnetic rope 720 are cross-fixed and connected together to form a stronger and more durable pull rope 700 structure. This combination not only retains the retractable performance of the retractable rope 710, but also increases the magnetic auxiliary positioning function of the magnetic rope 720, thereby improving the reliability and service life of the entire sampling device;

[0078] 5. Due to the combined design of the retractable rope 710 and the magnetic rope 720, the pull rope 700 can better adapt to the changes in different soil types and sampling conditions. Whether it is hard soil or soft soil, the pull rope 700 can provide appropriate retractable and magnetic attraction to ensure the stable operation of the soil-breaking claw 400.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soil and water conservation continuous sampling device, characterized in that: The invention comprises an outer sampling rod (100), an inner sampling rod (200), a push rod (300), a soil breaking claw (400), a movable rod (500) and a stopper (600); the outer sampling rod (100) is generally a truncated cone body with a larger top and a smaller bottom; a vertical outer sampling cavity (120) is provided in the outer sampling rod (100) along the central axis direction; the cross section of the outer sampling cavity (120) is rhombus-shaped, and the bottom end of the outer sampling rod (100) is open, so that the outer sampling cavity (120) ) is connected to the outside; the inner sampling rod (200) and the soil-breaking claw (400) are both located inside the outer sampling cavity (120); a plurality of soil-exiting channels (110) are provided inside the outer sampling rod (100); the lower end openings of the soil-exiting channels (110) are connected to the outer sampling cavity (120), and the upper end openings are located at the top of the outer sampling rod (100); the inner sampling rod (200) is a quadrangular prism as a whole, and the side walls of the inner sampling rod (200) and the outer sampling cavity (120) are connected to each other. 0); the inner sampling rod (200) is hollow inside and has an open lower end, and the lower end of the inner sampling rod (200) is connected to the soil breaking claw (400); the stopper (600) is located inside the inner sampling rod (200), and the stopper (600) is a quadrangular prism as a whole, and the side wall of the stopper (600) is slidably connected to the inner wall of the inner sampling rod (200); the top end of the inner sampling rod (200) is fixedly connected to the bottom end of the push rod (300), and the push rod (300) is fixedly connected to the bottom end of the push rod (300). ) is a long straight rod arranged vertically as a whole, and the push rod (300) passes through the outer sampling rod (100) and extends to the top of the outer sampling rod (100); the interior of the push rod (300) is penetrated along the central axis direction, and the outer wall of the movable rod (500) is slidably connected to the inner wall of the push rod (300); the bottom end of the movable rod (500) passes through the inner sampling rod (200) and is fixedly connected to the top end of the stopper (600), and the top end of the movable rod (500) extends out of the push rod (300); It also includes a plurality of pull ropes (700); one end of the pull rope (700) is evenly fixed to the bottom edge of the stopper (600), and the other end is fixed to the edge of the triangular claw block, and the number of pull ropes (700) connected to the four triangular claw blocks is the same; the number of the pull ropes (700) is not less than 12; in the initial state, when the soil-breaking claw (400) is closed and the top end of the stopper (600) is in contact with the inner wall of the top end of the inner sampling rod (200), the pull rope (700) is in a taut state, so that during the sampling process, the opening and closing degree of the soil-breaking claw (400) can be controlled by controlling the position of the stopper (600); The pull rope (700) comprises a retractable rope (710) and a magnetic rope (720), the number of the retractable rope (710) and the number of the magnetic rope (720) are both multiple, and the retractable rope (710) and the magnetic rope (720) are cross-fixed and connected together; the number of the retractable rope (710) and the magnetic rope (720) on each of the pull ropes (700) is not less than three; The interior of the magnetic rope (720) is hollow, the interior of the magnetic rope (720) is filled with magnetic fluid, and the material of the magnetic rope (720) is nylon; The telescopic rope (710) is hollow inside and is an airbag structure filled with gas. The telescopic rope (710) is made of elastic rubber. When the telescopic rope (710) is pulled by an external force, its length becomes longer and its width becomes thinner. The maximum length of the telescopic rope (710) after being subjected to force is no greater than 1.5 times the length of the telescopic rope (710) in the initial state.

2. The soil and water conservation continuous sampling device according to claim 1, characterized in that: The diameter of the upper end surface of the outer sampling rod (100) is between 1.5 and 2 times the diameter of the lower end surface; the sum of the cross-sectional areas of the plurality of the excavation paths (110) is not less than the sum of the cross-sectional areas of the outer sampling cavity (120); the length of the inner sampling rod (200) is between one third and one half of the length of the outer sampling cavity (120); the length of the movable rod (500) is greater than the sum of the lengths of the push rod (300) and the inner sampling rod (200), and the length of the push rod (300) is greater than the length of the outer sampling rod (100); when the top end of the inner sampling rod (200) is in contact with the top end of the outer sampling cavity (120), the lower end opening of the excavation path (110) is located below the inner sampling rod (200).

3. The soil and water conservation continuous sampling device according to claim 1, characterized in that: The area of ​​the middle opening of the soil-breaking claw (400) is smaller than the cross-sectional area of ​​the inner sampling rod (200); the cross-sectional area of ​​the outer sampling cavity (120) is square; a handle (310) is fixed to the upper portion of the top side wall of the push rod (300) to facilitate the control of the push rod (300) to move up and down; the cross-sectional shape of the inner sampling rod (200) is the same as the cross-sectional shape of the outer sampling cavity (120), and the cross-sectional shape of the stopper (600) is the same as the cross-sectional shape of the inner sampling rod (200).

4. The soil and water conservation continuous sampling device according to claim 1, characterized in that: The soil-breaking claw (400) comprises four triangular claw blocks, the four triangular claw blocks correspond one to one with the four bottom edges of the bottom opening of the inner sampling rod (200), the triangular claw blocks are hinged to the corresponding bottom edges of the inner sampling rod (200) through a spring-type hinge structure, and the triangular claw blocks can approach or move away from the central axis of the inner sampling rod (200) when hinged, so that the soil-breaking claw (400) as a whole can be in the shape of an inverted quadrangular pyramid when closed, and in the shape of a claw when unfolded; in an initial state, the soil-breaking claw (400) is in a closed state.

5. The soil and water conservation continuous sampling device according to claim 4, characterized in that: An inner magnet (130) is provided on the inner wall of the outer sampling cavity (120); the inner magnet (130) is in the shape of a circular tube as a whole, and is embedded in the inner wall of the outer sampling cavity (120); and the inner radius of the inner magnet (130) is equal to the inner radius of the outer sampling cavity (120); the inner magnet (130) is located below the excavation path (110); and the spring-type hinge structure enables the earth-breaking claw (400) to return to its original state after being unfolded under the action of a spring inside the spring-type hinge structure.

6. The soil and water conservation continuous sampling device according to claim 5, characterized in that: The push rod (300) pushes the inner sampling rod (200) to move downward, and when the soil breaking claw (400) moves downward to the inside of the inner magnet (130), the soil breaking claw (400) gradually expands under the magnetic force of the inner magnet (130), so that the inside of the inner sampling rod (200) and the outer sampling cavity (120) are connected. At this time, the inner sampling rod (200) continues to move downward, so that the soil breaking claw (400) is expanded to a greater extent, and the sample enters the inner sampling rod (200); the size of the space for storing the sample in the inner sampling rod (200) is controlled by controlling the position of the stopper (600) in the inner sampling rod (200); the push rod (300) pulls the inner sampling rod (200) to move upward, and when the soil breaking claw (400) moves upward to a range out of the inner magnet (130), the soil breaking claw (400) gradually returns to its original state under the action of the spring-type hinge structure.

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