A soil sampling device for geochemical exploration

Abstract

The present application relates to a soil sampling device for geochemical exploration, and relates to the field of geochemical exploration equipment, which includes a box, a sampling tube, a drill bit, a drilling assembly and a sampling assembly. A mounting plate is arranged in the box, the sampling tube is arranged at the bottom of the mounting plate, a plurality of sample collecting grooves are arranged circumferentially on the lower side wall of the sampling tube, and the drill bit is arranged below the sampling tube; the drilling assembly is arranged in the box, the drilling assembly includes a downward moving part and a rotating part, the downward moving part drives the mounting plate to move in a vertical direction, the rotating part is arranged at the top of the mounting plate, and the downward moving part drives the drill bit to rotate through the rotating part; the sampling assembly includes a power part and a soil collecting part, the power part is arranged on the mounting plate, the soil collecting part is arranged at the upper part of the sample collecting groove, and corresponds to the sample collecting groove one by one, the power part drives the soil collecting part to rotate, and the soil is transferred into the sample collecting groove. The present application enables the sampling device to obtain soil samples of different depths at a single time, thereby improving the detection efficiency.

Description

Technical Field

[0001] The present application relates to the field of geochemical exploration equipment, and in particular to a soil sampling device for geochemical exploration. Background Art

[0002] Soil geochemical exploration is the systematic determination of the element content in soil (including residual deposits, colluvial deposits, aeolian deposits, and glacial deposits), studying the distribution, allocation, concentration, and dispersion of each element in the soil, in order to discover geochemical anomalies related to mines in the soil, thereby finding mineral sources or solving geological problems.

[0003] When using the existing soil sampling device, first drill a hole downward from the ground to allow the sampling device to enter the soil. When drilling downward to a specified depth, the drilling is stopped. After sampling the soil, the sampling device is moved upward and removed from the soil to collect the soil sample for measurement and analysis.

[0004] However, since the existing soil sampling device can only sample soil at a specified depth at a time, if soil at different depths needs to be measured and analyzed, multiple sampling operations are required, which is inefficient. Summary of the invention

[0005] In order to enable the sampling device to obtain soil samples at different depths in a single time and improve the detection efficiency, the present application provides a soil sampling device for geochemical exploration.

[0006] The present application provides a soil sampling device for geochemical exploration, which adopts the following technical solution:

[0007] A soil sampling device for geochemical exploration, comprising a box, a sampling barrel, a drill bit, a drilling assembly and a sampling assembly, wherein a mounting plate is arranged in the box, the sampling barrel is arranged at the bottom of the mounting plate, a plurality of sample collecting grooves are arranged circumferentially on the lower side wall of the sampling barrel, and the drill bit is arranged below the sampling barrel;

[0008] The drilling assembly is arranged in the box body, and the drilling assembly comprises a downward moving member and a rotating member, wherein the downward moving member drives the mounting plate to move in a vertical direction, and the rotating member is arranged on the top of the mounting plate, and the downward moving member drives the drill bit to rotate through the rotating member;

[0009] The sampling assembly includes a power piece and a soil collecting piece. The power piece is arranged on the mounting plate. The soil collecting piece is arranged on the upper part of the sample collecting groove and corresponds to the sample collecting groove one by one. The power piece drives the soil collecting piece to rotate and pushes the soil into the sample collecting groove.

[0010] By adopting the above technical solution, when sampling, both the downward moving part and the rotating part are started, driving the mounting plate to drive the sampling tube and the drill bit to move downward, while the drill bit can be rotated downward to facilitate the sampling tube to enter the soil. When the sampling tube reaches the specified depth, the power part is started, driving the soil collecting part to push the surrounding soil into the corresponding sample collecting groove, completing the collection of soil samples. Then, the downward moving part and the rotating part are started again, and the sampling tube continues to move downward to another specified depth, and the soil sample is collected into another sample collecting groove, which saves manpower and can collect soil samples of multiple depths at one time, thereby improving detection efficiency.

[0011] Optionally, the soil collecting member includes a rotating tube and a soil expelling plate, the rotating tube is rotatably connected to the upper part of the sample collecting trough, at least two soil expelling plates are provided, and the two soil expelling plates are arranged in the same plane to close the sample collecting trough.

[0012] By adopting the above technical solution, when the sampling tube moves downward, the soil-pushing plate can close the sample collecting groove to prevent soil samples at other depths from entering the sample collecting groove. When the sampling tube reaches the specified depth, the power part drives the rotating tube to rotate, and the soil-pushing plate rotates along the axis of the rotating tube, which can break up the soil and push it into the sample collecting groove. The operation is simple and convenient.

[0013] Optionally, the power part includes an air supply cylinder, a sealing block and a plurality of rotating telescopic rods, the air supply cylinder is arranged on the top of the mounting plate, the sealing block is sealingly and slidably connected in the air supply cylinder, a spiral groove is opened on the inner wall of the rodless cavity of the rotating telescopic rod, a protrusion is fixedly connected to the movable end of the rotating telescopic rod, the protrusion is slidably connected in the spiral groove, the movable end of the rotating telescopic rod is passed through the rotating tube and is keyed to the rotating tube, a plurality of rotating telescopic rods correspond one by one to a plurality of sample collecting slots, an end of the air supply cylinder away from the sealing block is connected to the rodless cavity of one of the rotating telescopic rods, the rodless cavity of the rotating telescopic rod connected to the air supply cylinder is connected to the rodless cavities of other rotating telescopic rods in sequence, and an overflow valve is connected between the rodless cavities of adjacent rotating telescopic rods.

[0014] By adopting the above technical solution, when the sampling tube reaches the specified depth, the sealing block is pushed to press the gas in the air supply tube into the rodless cavity of the rotating telescopic rod, driving the movable end of the rotating telescopic rod to extend. While the movable end of the rotating telescopic rod extends, the protrusion will move along the setting direction of the spiral groove, driving the movable end of the rotating telescopic rod to rotate, thereby driving the rotating tube to rotate, so that the soil-moving plate will move the surrounding soil into the sample collecting groove, and due to the setting of the overflow valve, the sample collecting groove will collect soil in turn when reaching different depths, and the operation is convenient and quick.

[0015] Optionally, the downward moving member includes a driving motor, a driving gear and a guide rack. The driving motor is fixedly mounted on the top of the mounting plate, and the output shaft of the driving motor drives the driving gear to rotate. The guide rack is fixedly mounted on the inner wall of the box in a vertical direction, and the driving gear is meshed with the guide rack.

[0016] By adopting the above technical solution, the drive motor is started, and the output shaft of the drive motor drives the active gear to rotate, driving the mounting plate to drive the sampling tube and the drill bit to move downward along the setting direction of the guide rack, with a compact structure and stable transmission.

[0017] Optionally, the rotating part includes a first synchronous pulley, a second synchronous pulley, a synchronous belt, a first bevel gear and a second bevel gear, the first synchronous pulley is driven to rotate by the output shaft of the driving motor, a connecting shaft is provided on the mounting plate, the second synchronous pulley is coaxially fixedly connected to the connecting shaft, the synchronous belt is wound around the first synchronous pulley and the second synchronous pulley, the first bevel gear is coaxially fixedly connected to the connecting shaft, the second bevel gear is coaxially fixedly connected to the rotating shaft of the drill bit, and the first bevel gear is meshingly connected to the second bevel gear.

[0018] By adopting the above technical solution, when the driving motor is started, the output shaft of the driving motor can drive the first synchronous pulley to rotate, and the first synchronous pulley drives the second synchronous pulley to rotate through the synchronous belt, and the second synchronous pulley can drive the first bevel gear to rotate through the connecting shaft, thereby driving the second bevel gear to drive the rotating shaft of the drill bit to rotate, so that the drill bit can rotate along its own axis while moving downward, making it easier to open a downward movement channel in the soil, making it convenient for the sampling tube to enter the soil.

[0019] Optionally, a switching assembly is also provided in the box body, and the switching assembly includes a connecting telescopic rod, the connecting telescopic rod is fixedly connected to the output shaft of the driving motor, the driving gear is fixedly connected to the movable end of the connecting telescopic rod, the first synchronous pulley is fixedly connected to the fixed end of the connecting telescopic rod, and a pushing rack is provided on the top of the mounting plate, and the pushing rack is fixedly connected to the sealing block, when the connecting telescopic rod is in an extended state, the driving gear is meshed and connected with the guide rack, and when the connecting telescopic rod is in a contracted state, the driving gear is meshed and connected with the pushing rack.

[0020] By adopting the above technical solution, when the sampling tube reaches the specified depth, the connected telescopic rod is controlled to retract, so that the active gear is engaged with the pushing rack and no longer engaged with the guide rack. At this time, the sampling tube stays at the specified depth, and the active gear still rotates with the output shaft of the driving motor, driving the pushing rack to move. The pushing rack will push the sealing block, and the gas in the air delivery tube will be pressed into the rodless cavity of the rotating telescopic rod. The movable end of the rotating telescopic rod drives the rotating tube to rotate, and the soil-digging plate will dig the soil sample into the sample collecting groove. After the sampling is completed, the connected telescopic rod is controlled to extend, and the active gear is engaged with the guide rack again, driving the sampling tube to continue to move downward. The switching between the moving and sampling states can be completed by controlling the connected telescopic rod, and the operation is simple.

[0021] Optionally, the switching assembly also includes a plurality of depth telescopic rods, which are arranged on the inner wall of the box at intervals in the vertical direction, and the plurality of depth telescopic rods correspond one-to-one to the plurality of sample collecting slots, the rod-free cavity of each depth telescopic rod is connected to the rod cavity of the connecting telescopic rod, and the movable end of each depth telescopic rod is provided with a guide slope.

[0022] By adopting the above technical solution, the depth telescopic rods are installed at the specified depth below the mounting plate according to the calculation of the initial position of the mounting plate. When the mounting plate moves downward, the movable end of the depth telescopic rod is squeezed along the guide slope, and the medium in the rodless cavity of the depth telescopic rod is pressed into the rod cavity of the connecting telescopic rod, driving the connecting telescopic rod to contract, so that the driving gear is disengaged from the guide rack and meshed with the push rack. The sampling tube no longer moves, and the soil-moving plate is used for sampling without manual operation, which is more convenient and quick.

[0023] Optionally, the switching assembly also includes multiple gravity telescopic rods and multiple yield telescopic rods, the multiple gravity telescopic rods correspond one-to-one to the multiple sample collecting slots, the gravity telescopic rod is arranged at the bottom of the sample collecting slot, the top of the movable end of the gravity telescopic rod is fixedly connected with a receiving plate, the inner wall of the box body is provided with a yield slot, the depth telescopic rod is arranged in the yield slot, the yield telescopic rod corresponds one-to-one to the depth telescopic rod, the yield telescopic rod is fixedly installed on the inner wall of the yield slot, the movable end of the yield telescopic rod is fixedly connected to the depth telescopic rod, the rodless cavity of the gravity telescopic rod is connected to the rodless cavity of the yield telescopic rod, and a return spring is arranged in the rodless cavity of the depth telescopic rod.

[0024] By adopting the above technical scheme, the soil-pushing plate pushes the surrounding soil into the sample collecting groove and drops it on the receiving plate. As the weight of the soil increases, the receiving plate moves downward, pressing the medium in the rodless cavity of the gravity telescopic rod into the rodless cavity of the yielding telescopic rod. The yielding telescopic rod extends, driving the depth telescopic rod to move toward the bottom of the yielding groove. At this time, under the elastic reset action of the reset spring, the depth telescopic rod extends, and the medium in the rod cavity of the connected telescopic rod enters the rodless cavity of the depth telescopic rod. The connected telescopic rod extends, and the active gear meshes with the guide rack again, and the sampling tube continues to move downward to another specified depth for sampling, making the device more automated and further improving the detection efficiency.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. When the sampling tube moves downward, the soil-swiping plate can close the sample collecting groove to prevent soil samples from other depths from entering the sample collecting groove. When the sampling tube reaches the specified depth, the power part drives the rotating tube to rotate, and the soil-swiping plate rotates along the axis of the rotating tube to break up the soil and push it into the sample collecting groove. The operation is simple and convenient.

[0027] 2. When the sampling tube reaches the specified depth, the sealing block is pushed to press the gas in the air delivery tube into the rodless cavity of the rotating telescopic rod, driving the movable end of the rotating telescopic rod to extend. When the movable end of the rotating telescopic rod extends, the convex block will move along the setting direction of the spiral groove, driving the movable end of the rotating telescopic rod to rotate, thereby driving the rotating tube to rotate, so that the soil-digging plate will dig the surrounding soil into the sample collecting groove. In addition, due to the setting of the overflow valve, the sample collecting groove will collect soil in turn when reaching different depths, and the operation is convenient and quick;

[0028] 3. Calculate based on the initial position of the mounting plate, and install the depth telescopic rods at the specified depth below the mounting plate. When the mounting plate moves downward, the movable end of the depth telescopic rod will be squeezed along the guide slope, and the medium in the rodless cavity of the depth telescopic rod will be pressed into the rod cavity of the connecting telescopic rod, driving the connecting telescopic rod to contract, so that the driving gear disengages from the guide rack and engages with the push rack. The sampling tube no longer moves, and the soil-moving plate takes samples without manual operation, which is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the soil sampling device for geochemical exploration of the present application;

[0030] Figure 2 is a cross-sectional view of the soil sampling device for geochemical exploration of the present application;

[0031] Figure 3 It is a schematic diagram of the installation of the depth telescopic rod and the yielding telescopic rod in the soil sampling device for geochemical exploration of the present application;

[0032] Figure 4 It is a schematic diagram of the installation of the rotating parts in the soil sampling device for geochemical exploration of the present application;

[0033] Figure 5 It is a schematic diagram of the installation of the overflow valve in the soil sampling device for geochemical exploration of the present application;

[0034] Figure 6 yes Figure 3 A magnified view of part A;

[0035] Figure 7 yes Figure 5 Magnified view of part B.

[0036] Description of reference numerals: 1, housing; 11, mounting plate; 12, support spring; 13, clearance groove; 2, sampling tube; 21, sample collecting groove; 3, drill bit; 4, drilling assembly; 41, lower moving member; 411, driving motor; 412, driving gear; 413, guide rack; 42, rotating member; 421, first synchronous pulley; 422, second synchronous pulley; 423, synchronous belt; 424, first bevel gear; 425, second bevel gear; 5. Sampling assembly; 51. Power part; 511. Air delivery cylinder; 512. Sealing block; 513. Rotating telescopic rod; 5131. Spiral groove; 5132. Bump; 52. Soil collecting part; 521. Rotating tube; 522. Soil-moving plate; 6. Switching assembly; 61. Depth telescopic rod; 611. Return spring; 62. Connecting telescopic rod; 63. Gravity telescopic rod; 64. Yielding telescopic rod; 7. Overflow valve; 8. Push rack; 9. Receiver plate. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 This application is described in further detail.

[0038] Reference Figure 1 , Figure 2 and Figure 3 A soil sampling device for geochemical exploration disclosed in an embodiment of the present application includes a box body 1, a sampling tube 2, a drill bit 3, a drilling assembly 4, a sampling assembly 5 and a switching assembly 6. The box body 1 is a hollow square body. In order to facilitate movement, a moving wheel is installed at the bottom of the box body 1, and a handle is installed on one side of the box body 1. A mounting plate 11 is arranged in the horizontal direction inside the box body 1, and the bottom edge of the mounting plate 11 is mounted on the inner bottom wall of the box body 1 through a supporting spring 12.

[0039] The sampling tube 2 is a cylinder and is fixedly mounted on the bottom of the mounting plate 11 in the vertical direction. The lower side wall of the sampling tube 2 is provided with a plurality of sample collecting grooves 21 along its own axis circumferentially for collecting soil samples of different depths. In this embodiment, three sample collecting grooves 21 are provided.

[0040] The drill bit 3 is an inverted cone and is disposed below the sampling tube 2 . A rotating shaft is fixedly mounted on the top of the drill bit 3 . The rotating shaft of the drill bit 3 penetrates the sampling tube 2 in a vertical direction and is rotatably connected to the mounting plate 11 .

[0041] Reference Figure 2 and Figure 4 The drilling assembly 4 includes a downward moving member 41 and a rotating member 42, wherein the downward moving member 41 includes a driving motor 411, a driving gear 412 and a guide rack 413, the driving motor 411 is fixedly installed on the top of the mounting plate 11, the output shaft of the driving motor 411 is fixedly connected to the driving gear 412, the guide rack 413 is fixedly installed on the inner wall of the box body 1 along the vertical direction, and the driving gear 412 is meshed with the guide rack 413.

[0042] The rotating member 42 includes a first synchronous pulley 421, a second synchronous pulley 422, a synchronous belt 423, a first bevel gear 424 and a second bevel gear 425, wherein the first synchronous pulley 421 is fixedly connected to the output shaft of the driving motor 411, a connecting shaft is arranged at the top of the mounting plate 11 in the horizontal direction, the second synchronous pulley 422 is coaxially fixedly connected to the connecting shaft, the synchronous belt 423 is wound around the first synchronous pulley 421 and the second synchronous pulley 422, the first bevel gear 424 is also coaxially fixedly connected to the connecting shaft, the second bevel gear 425 is coaxially fixedly connected to the rotating shaft of the drill bit 3, and the first bevel gear 424 and the second bevel gear 425 are meshingly connected.

[0043] When the inspector pushes the box 1 to the specified position, the drive motor 411 is started. The output shaft of the drive motor 411 drives the active gear 412 and the first synchronous pulley 421 to rotate synchronously, driving the mounting plate 11 to drive the sampling tube 2 and the drill bit 3 to move downward. At the same time, the first synchronous pulley 421 drives the second synchronous pulley 422 to rotate synchronously through the synchronous belt 423, and the first bevel gear 424 also rotates accordingly, thereby driving the second bevel gear 425 to drive the rotating shaft of the drill bit 3 to rotate, so that the drill bit 3 can rotate along its own axis while moving downward, making it easier to open up a downward movement channel in the soil, making it convenient for the sampling tube 2 to enter the soil.

[0044] Reference Figure 3 , Figure 5 and Figure 6The sampling assembly 5 includes a power component 51 and multiple soil collecting components 52, wherein the power component 51 includes an air supply cylinder 511, a sealing block 512 and multiple rotating telescopic rods 513, the air supply cylinder 511 is installed on the top of the mounting plate 11 in the horizontal direction, the sealing block 512 is sealingly and slidably connected in the air supply cylinder 511, the rotating telescopic rod 513 is installed on one side of the sample collecting slot 21, and the multiple rotating telescopic rods 513 correspond one by one to the multiple sample collecting slots 21. Therefore, in this embodiment, three rotating telescopic rods 513 are also provided, and the rodless cavity of one rotating telescopic rod 513 is connected to the end of the air supply cylinder 511 away from the guide rack 413, the rodless cavities of the three rotating telescopic rods 513 are connected in sequence, and an overflow valve 7 is connected between adjacent rotating telescopic rods 513. That is to say, when the sealing block 512 moves, the medium in the air cylinder 511 is squeezed into the rodless cavity of one of the rotating telescopic rods 513. When the sealing block 512 continues to move, the medium in the air cylinder 511 will pass through the rodless cavity of the first rotating telescopic rod 513 and enter the rodless cavity of the second rotating telescopic rod 513. The sealing block 512 continues to move, and the medium in the air cylinder 511 will pass through the rodless cavity of the first rotating telescopic rod 513 and the rodless cavity of the second rotating telescopic rod 513 and enter the rodless cavity of the third rotating telescopic rod 513.

[0045] It should be noted that, refer to Figure 7 A spiral groove 5131 is provided on the inner wall of the rodless cavity of the rotating telescopic rod 513, and a protrusion 5132 is fixedly connected to the side wall of the movable end of the rotating telescopic rod 513, and the protrusion 5132 is slidably connected to the spiral groove 5131. When the medium in the air supply cylinder 511 enters the rodless cavity of the rotating telescopic rod 513, the movable end of the rotating telescopic rod 513 is extended. At the same time, since the protrusion 5132 moves along the setting direction of the spiral groove 5131, the movable end of the rotating telescopic rod 513 can rotate along its own axis while extending.

[0046] Reference Figure 3 and Figure 6 The soil collecting pieces 52 also correspond to the sample collecting grooves 21 one by one. Three soil collecting pieces 52 are also provided in the present application. Each soil collecting piece 52 includes a rotating tube 521 and at least two soil expelling plates 522. The rotating tube 521 is rotatably connected to the upper inner wall of the sample collecting groove 21. The soil expelling plates 522 are fixedly connected to the side walls of the rotating tube 521 along the circumferential direction of the axis of the rotating tube 521. In the present embodiment, three soil expelling plates 522 are provided, two of which are in the same vertical plane, which can close the sample collecting groove 21. When the sampling tube 2 moves in the soil, soil is prevented from falling into the sample collecting groove 21 as much as possible.

[0047] The movable end of the rotating telescopic rod 513 is passed through the rotating tube 521 and is key-connected to the rotating tube 521. When the gas in the air supply cylinder 511 enters the rodless cavity of the rotating telescopic rod 513, the movable end of the rotating telescopic rod 513 can drive the rotating tube 521 to rotate, and the soil-moving plate 522 rotates accordingly, pushing the soil in the surrounding environment into the corresponding sample collecting slot 21 to complete the sampling.

[0048] Reference Figure 3 , Figure 4 and Figure 6 The switching assembly 6 includes a depth telescopic rod 61, a connecting telescopic rod 62, a gravity telescopic rod 63 and a yielding telescopic rod 64. In this embodiment, three depth telescopic rods 61 are provided, and they correspond one to one with the sample collecting slots 21. Based on the initial position of the mounting plate 11, the three depth telescopic rods 61 are respectively installed at a specified depth below the mounting plate 11 in the vertical direction. Three yielding slots 13 are provided on the side wall of the box body 1. The three depth telescopic rods 61 correspond one to one with the three yielding slots 13, and the depth telescopic rods 61 are installed in the yielding slots 13. It should be supplemented that a guiding inclined plane is provided at the top of the movable end of the depth telescopic rod 61, and the guiding inclined plane is arranged to be inclined downward from the side close to the bottom of the yielding slot 13 to the side away from the bottom of the yielding slot 13.

[0049] The connecting telescopic rod 62 is fixedly connected to the output shaft of the driving motor 411, the driving gear 412 is coaxially fixedly connected to the movable end of the connecting telescopic rod 62, the first synchronous pulley 421 is coaxially fixedly connected to the fixed end of the connecting telescopic rod 62, the rodless cavities of the three depth telescopic rods 61 are all connected to the rod cavity of the connecting telescopic rod 62, and a return spring 611 is fixedly installed in the rodless cavity of the depth telescopic rod 61. The top of the mounting plate 11 is slidably connected to the pushing rack 8 in the horizontal direction. When the connecting telescopic rod 62 is in the extended state, the driving gear 412 is meshed and connected with the guide rack 413, and when the connecting telescopic rod 62 is in the retracted state, the driving gear 412 is meshed and connected with the pushing rack 8.

[0050] Three gravity telescopic rods 63 are also provided and are respectively fixedly installed on the inner bottom walls of the three sample collecting slots 21 along the vertical direction. The movable ends of the gravity telescopic rods 63 are fixedly connected with the receiving plates 9 .

[0051] There are also three yielding telescopic rods 64, which are respectively installed in the three yielding slots 13. The three yielding telescopic rods 64 correspond to the three depth telescopic rods 61 one by one, and the movable ends of the yielding telescopic rods 64 are fixedly connected to the fixed ends of the depth telescopic rods 61. It should be noted that the three yielding telescopic rods 64 correspond to the three gravity telescopic rods 63 one by one, and the rodless cavity of the gravity telescopic rod 63 is connected to the rodless cavity of the corresponding yielding telescopic rod 64.

[0052] The implementation principle of a soil sampling device for geochemical exploration in an embodiment of the present application is as follows: when the inspector pushes the box 1 to the specified position, the drive motor 411 is started. At this time, the connecting telescopic rod 62 is in an extended state. The output shaft of the drive motor 411 drives the active gear 412 and the first synchronous pulley 421 to rotate synchronously. The first synchronous pulley 421 drives the second synchronous pulley 422 to rotate synchronously through the synchronous belt 423, and the first bevel gear 424 also rotates accordingly, thereby driving the second bevel gear 425 to drive the rotating shaft of the drill bit 3 to rotate, so that the drill bit 3 can rotate along its own axis while moving downward, opening up a channel.

[0053] When the mounting plate 11 moves down to contact the movable end of the depth telescopic rod 61, it will squeeze the movable end of the depth telescopic rod 61 along the guiding inclined surface, press the medium in the rodless cavity of the depth telescopic rod 61 into the rod cavity of the connecting telescopic rod 62, drive the connecting telescopic rod 62 to contract, so that the active gear 412 disengages from the guide rack 413 and engages with the pushing rack 8. At this time, the sampling tube 2 no longer moves, and the active gear 412 still rotates with the output shaft of the driving motor 411, driving the pushing rack 8 to move. The pushing rack 8 will push the sealing block 512, and press the gas in the air delivery tube 511 into the rodless cavity of the rotating telescopic rod 513. The movable end of the rotating telescopic rod 513 drives the rotating tube 521 to rotate, and the soil-digging plate 522 digs the soil sample into the sample collecting groove 21.

[0054] The soil sample dialed into the sample collecting slot 21 falls on the receiving plate 9. As the weight of the soil increases, the receiving plate 9 moves downward, pressing the medium in the rodless cavity of the gravity telescopic rod 63 into the rodless cavity of the yielding telescopic rod 64. The yielding telescopic rod 64 stretches, driving the depth telescopic rod 61 to move toward the bottom of the yielding slot 13. At this time, under the elastic reset action of the reset spring 611, the depth telescopic rod 61 stretches, that is, the movable end of the depth telescopic rod 61 is still in contact with the mounting plate 11, and the medium in the rod cavity of the connecting telescopic rod 62 enters the rodless cavity of the depth telescopic rod 61. The connecting telescopic rod 62 stretches, and the active gear 412 meshes with the guide rack 413 again, driving the sampling tube 2 to continue to move downward to another specified depth for sampling. Therefore, the soil sampling device in the present application can sample soils of different depths at a single time, which significantly improves the sampling efficiency and detection efficiency.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A soil sampling device for geochemical exploration, characterized in that: The invention comprises a housing (1), a sampling tube (2), a drill bit (3), a drilling assembly (4) and a sampling assembly (5); a mounting plate (11) is arranged in the housing (1); the sampling tube (2) is arranged at the bottom of the mounting plate (11); a plurality of sample collecting grooves (21) are circumferentially arranged on the lower side wall of the sampling tube (2); and the drill bit (3) is arranged below the sampling tube (2); the drilling assembly (4) is arranged in the housing (1); the drilling assembly (4) comprises a downward moving member (41) and a rotating member (42); the downward moving member (41) drives the mounting plate (11) to move in a vertical direction; the rotating member (42) is arranged at the top of the mounting plate (11); and the downward moving member (41) drives the drill bit (3) to rotate through the rotating member (42); The sampling assembly (5) comprises a power member (51) and a soil collecting member (52), wherein the power member (51) is arranged on the mounting plate (11), and the soil collecting member (52) is arranged on the upper part of the sample collecting groove (21) and corresponds to the sample collecting groove (21) one by one, and the power member (51) drives the soil collecting member (52) to rotate, so as to push the soil into the sample collecting groove (21); The soil collecting member (52) comprises a rotating tube (521) and a soil expelling plate (522), wherein the rotating tube (521) is rotatably connected to the upper part of the sample collecting trough (21), and at least two soil expelling plates (522) are provided, and the two soil expelling plates (522) are arranged on the same plane, and can close the sample collecting trough (21); The power member (51) comprises an air supply cylinder (511), a sealing block (512) and a plurality of rotating telescopic rods (513); the air supply cylinder (511) is arranged on the top of the mounting plate (11); the sealing block (512) is sealingly and slidably connected in the air supply cylinder (511); a spiral groove (5131) is provided on the inner wall of the rodless cavity of the rotating telescopic rod (513); a protrusion (5132) is fixedly connected to the movable end of the rotating telescopic rod (513); the protrusion (5132) is slidably connected in the spiral groove (5131); the movable end of the rotating telescopic rod (513) is fixedly connected to the movable end of the rotating telescopic rod (513); the protrusion (5132) is slidably connected in the spiral groove (5131); The movable end is passed through the rotating tube (521) and is key-connected to the rotating tube (521); the plurality of rotating telescopic rods (513) correspond one-to-one to the plurality of sample collecting slots (21); one end of the air supply cylinder (511) away from the sealing block (512) is connected to the rodless cavity of one of the rotating telescopic rods (513); the rodless cavity of the rotating telescopic rod (513) connected to the air supply cylinder (511) is connected to the rodless cavity of the other rotating telescopic rods (513) in sequence; and an overflow valve (7) is connected between the rodless cavities of adjacent rotating telescopic rods (513).

2. The soil sampling device for geochemical exploration according to claim 1, characterized in that: The downward moving member (41) comprises a driving motor (411), a driving gear (412) and a guide rack (413); the driving motor (411) is fixedly mounted on the top of the mounting plate (11); the output shaft of the driving motor (411) drives the driving gear (412) to rotate; the guide rack (413) is fixedly mounted on the inner wall of the box body (1) in a vertical direction; the driving gear (412) is meshedly connected with the guide rack (413).

3. The soil sampling device for geochemical exploration according to claim 2, characterized in that: The rotating member (42) comprises a first synchronous pulley (421), a second synchronous pulley (422), a synchronous belt (423), a first bevel gear (424) and a second bevel gear (425); the first synchronous pulley (421) is driven to rotate by the output shaft of the driving motor (411); a connecting shaft is provided on the mounting plate (11); the second synchronous pulley (422) is coaxially fixedly connected to the connecting shaft; the synchronous belt (423) is wound around the first synchronous pulley (421) and the second synchronous pulley (422); the first bevel gear (424) is coaxially fixedly connected to the connecting shaft; the second bevel gear (425) is coaxially fixedly connected to the rotating shaft of the drill bit (3); and the first bevel gear (424) is meshingly connected with the second bevel gear (425).

4. The soil sampling device for geochemical exploration according to claim 3, characterized in that: A switching assembly (6) is also provided in the box body (1), and the switching assembly (6) comprises a connecting telescopic rod (62), the connecting telescopic rod (62) is fixedly connected to the output shaft of the driving motor (411), the driving gear (412) is fixedly connected to the movable end of the connecting telescopic rod (62), the first synchronous pulley (421) is fixedly connected to the fixed end of the connecting telescopic rod (62), a pushing rack (8) is provided on the top of the mounting plate (11), and the pushing rack (8) is fixedly connected to the sealing block (512), when the connecting telescopic rod (62) is in an extended state, the driving gear (412) is meshedly connected to the guide rack (413), and when the connecting telescopic rod (62) is in a retracted state, the driving gear (412) is meshedly connected to the pushing rack (8).

5. The soil sampling device for geochemical exploration according to claim 4, characterized in that: The switching assembly (6) further comprises a plurality of depth telescopic rods (61), the plurality of depth telescopic rods (61) being arranged at intervals on the inner wall of the box body (1) along the vertical direction, the plurality of depth telescopic rods (61) corresponding one-to-one to the plurality of sample collecting slots (21), the rodless cavity of each depth telescopic rod (61) being connected to the rod cavity of the connecting telescopic rod (62), and the movable end of each depth telescopic rod (61) being provided with a guiding inclined surface.

6. The soil sampling device for geochemical exploration according to claim 5, characterized in that: The switching assembly (6) further comprises a plurality of gravity telescopic rods (63) and a plurality of yielding telescopic rods (64), wherein the plurality of gravity telescopic rods (63) correspond to the plurality of sample collecting slots (21) in a one-to-one manner, the gravity telescopic rods (63) are arranged at the bottom of the sample collecting slots (21), the top of the movable end of the gravity telescopic rod (63) is fixedly connected to a receiving plate (9), the inner wall of the box body (1) is provided with a yielding slot (13), and the depth telescopic rod (61) is arranged at the yielding slot. In the groove (13), the yielding telescopic rod (64) corresponds to the depth telescopic rod (61) one by one, the yielding telescopic rod (64) is fixedly installed on the inner wall of the yielding groove (13), the movable end of the yielding telescopic rod (64) is fixedly connected to the depth telescopic rod (61), the rodless cavity of the gravity telescopic rod (63) is connected to the rodless cavity of the yielding telescopic rod (64), and a return spring (611) is arranged in the rodless cavity of the depth telescopic rod (61).

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