Soil sampling device for geological exploration

Abstract

The invention relates to the technical field of geological exploration, in particular to a soil sampling device for geological exploration. Comprising a sampling drill bit and a material storage barrel detachably connected with the sampling drill bit, a material storage cavity is formed in the material storage barrel, a notch is formed in the material storage barrel, a baffle detachably connected with the material storage barrel is arranged at the notch, the top of the material storage barrel is coaxially connected with an output shaft of a motor, a handle is arranged on the motor, and a power mechanism is arranged at the top of the material storage barrel. Air is used as power to overcome elastic potential energy of a reset spring to push a check block to rotate anticlockwise, the check block drives an arc-shaped rod to rotate, an outer rotating disc rotates with the central axis of a material storage cavity as the center, similarly, the outer rotating disc drives blades to rotate through a plurality of supporting rods, and soil between a sampling drill bit and the material storage cavity is gradually separated along with rotation of the blades; when the multiple blades are matched with one another, the blades play a role in supporting soil in the material storage cavity, and therefore loose soil in the material storage cavity is prevented from falling off.

Description

Technical Field

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

[0002] In the process of geological exploration, soil sampling is required for the geology to be explored. Commonly used sampling tools include soil drills, iron hoes and shovels. The sampling depth is an important factor in determining the collection of soil samples. The sampling depth should be determined according to specific engineering requirements and the purpose of the survey. For example, in the study of soil mechanical properties, it is usually necessary to collect samples at different depths for experimental analysis to obtain soil properties, including cohesion, adhesion, plasticity, and swelling and shrinkage.

[0003] Existing soil detection sampling methods are divided into manual sampling and drilling sampling. Manual sampling is suitable for shallow soil. When drilling sampling is adopted, the sampling process is affected by the looseness of the soil. When the drilled soil is in a loose state, the friction between the soil and the inner wall of the sampling drill bit is small. After the drilling is completed, the sampling drill bit is taken out of the ground. During this process, there is not enough friction to prevent the soil from falling off, which affects the later detection and analysis of soil samples. Moreover, in order to avoid the soil in the sampling drill bit from being squeezed with the inner wall, space is usually left between the soil and the inner wall during drilling. After the manual operation of the machine drilling is completed, the sampling drill bit is often placed horizontally. At this time, the loose soil will overturn to one side of the sampling drill bit, resulting in a change in the relative position between the soil particles, destroying the in-situ structure of the soil, and affecting the accurate assessment of the soil properties. Summary of the invention

[0004] The technical problem to be solved by the present invention is to prevent the sampled soil from falling out of the sampling drill bit, and secondly, to avoid the soil in the sampling drill bit tipping over to one side when the sampling drill bit is placed horizontally, thereby destroying the original state.

[0005] In order to solve the above technical problems, the present invention provides a soil sampling device for geological exploration, including a sampling drill bit and a storage barrel detachably connected to the sampling drill bit, the storage barrel has a storage cavity inside, the storage barrel has a notch, a baffle detachably connected to the storage barrel is arranged at the notch, the top of the storage barrel is coaxially connected to the output shaft of the motor, the motor is provided with a handle, a power mechanism is arranged on the top of the storage barrel, an iris mechanism is arranged between the sampling drill bit and the storage barrel, and an air transmission channel opened in the storage barrel transfers the power mechanism The power mechanism is connected with the iris mechanism. When drilling is finished, the power mechanism is pressed to use air as power to push the iris mechanism to contract. The iris mechanism is used to separate the sampling drill bit from the soil inside the storage barrel to limit the falling of the soil. A limiting mechanism for blocking the loose soil is arranged in the storage cavity inside the storage barrel. A chamber connected with the air transmission channel is formed between the upper part of the limiting mechanism and the inner wall of the storage barrel. The power mechanism is continuously pressed to supply air to the chamber, so that the limiting mechanism moves downward to reduce the space for the overturning of the loose soil.

[0006] As a further improvement of the present technical solution, the iris mechanism includes a plurality of blades of the same size, which, when matched with each other, form a circular plate that separates the material storage cavity, and the blades have a matching angle, a fixed angle, and a rotation angle, wherein the fixed angle is rotationally connected to an inner turntable located above the blades, the inner turntable is fixedly connected to the material storage barrel above, and the inner diameter of the inner turntable is the same as the inner diameter of the material storage cavity.

[0007] As a further improvement of the technical solution, an outer turntable slidably connected to the upper surface of the sampling drill bit is provided on the outer ring of the blade, a support rod is rotatably connected between the outer turntable and the rotation angle, an arc rod is fixedly connected to the outer turntable, a reset spring sleeved on the arc rod is against the stopper, and the other end of the arc rod is fixedly connected to the stopper, the stopper is sleeved and matched with a cavity opened inside the sampling drill bit, and the connection between the cavity and the gas transmission channel is located on the side away from the reset spring.

[0008] As a further improvement of the present technical solution, the power mechanism includes an upper pressure plate with a through hole in the middle, and a lower pressure plate fixedly connected to the bottom of the upper pressure plate by a vertical rod, the upper pressure plate is located above the storage barrel, and the vertical rod penetrates the storage barrel, the lower pressure plate is located in an air storage cavity opened inside the storage barrel and is sleeved with the air storage cavity, the top of the air storage cavity is connected to the external environment, and the bottom is connected to the air transmission channel.

[0009] As a further improvement of the present technical solution, a ring coaxially connected to the storage barrel is arranged in the through hole of the upper pressure plate, and a plurality of slots are arranged on the outer edge of the ring in the vertical direction. A clamping plate that passes through the upper pressure plate is arranged corresponding to the slots, and the end of the clamping plate has a clamping block that engages with the slot, and the other end is elastically connected to the bottom of the upper pressure plate by a connecting spring.

[0010] As a further improvement of the present technical solution, a plurality of partitions are arranged in the storage cavity, and the chambers in the storage barrel are divided by cross-shaped partitions. The angle corresponding to each chamber is the same as the angle corresponding to the notch on the storage barrel. The end of the partition away from the central axis of the storage cavity is fitted with the inner wall of the storage cavity. The top of the partition is coaxially connected to the knob located inside the ring, and a through groove for rotating the knob is provided on the ring corresponding to the knob.

[0011] As a further improvement of the technical solution, the limiting mechanism includes a limiting plate with the same angle as the chamber, the side of the limiting plate is in contact with the partition, and a tension spring is elastically connected between each limiting plate and the inner wall of the storage barrel.

[0012] As a further improvement of the technical solution, the air storage cavity and the chamber are connected by a second branch air channel opened in the storage barrel, and the second branch air channels on both sides are symmetrically arranged, each second branch air channel and the first branch air channel respectively corresponds to a chamber, and the connection between the second branch air channel and the chamber is lower than the upper surface of the limit plate in the horizontal direction, and a silicone strip for limiting the movement of the limit plate is arranged on the inner wall of the storage cavity of the storage barrel.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the soil sampling device for geological exploration, air is used as a power to overcome the elastic potential energy of the reset spring to push the block to rotate counterclockwise. As the block drives the arc rod to rotate, the outer turntable rotates with the central axis of the storage cavity as the center. Similarly, the outer turntable drives the blades to rotate through multiple support rods. As the blades rotate, the soil between the sampling drill bit and the storage cavity is gradually separated. When the multiple blades are matched with each other, the blades support the soil in the storage cavity, thereby preventing the loose soil in the storage cavity from falling off.

[0014] 2. In the soil sampling device for geological exploration, the card slot and the card block are released, and the upper pressure plate is pressed downward again to make the lower pressure plate continue to move downward. At this time, the blades have been matched with each other, and the air in the air storage cavity is transported into the chamber, so that the thrust of the air on the limit plate breaks through the friction between the limit plate and the silicone strip and the elastic potential energy of the stretch spring. The limit plate approaches the soil below to prevent the soil from tipping over to one side and affecting the original structure of the soil during horizontal sampling and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the sampling drill bit and the storage barrel of the present invention; Figure 3 It is a schematic diagram of the connection structure of the blade, inner rotating disk, inner rotating disk and outer rotating disk of the present invention; Figure 4It is a top view of the cutaway structure of the material storage barrel of the present invention; Figure 5 It is a schematic diagram of the partial cutaway structure of the material storage barrel of the present invention; Figure 6 It is a front view of the internal structure of the storage barrel of the present invention with a partial cutaway view; Figure 7 It is a partially cut-away internal left view of a storage barrel of the present invention.

[0016] The meaning of each number in the figure is: 100, sampling drill bit; 101, motor; 110, storage barrel; 111, baffle; 112, gas transmission channel; 113, gas storage cavity; 114, first branch gas channel; 115, second branch gas channel; 116, silicone strip; 120, power mechanism; 121, upper pressing plate; 122, lower pressing plate; 130, partition; 131, knob; 140, iris mechanism; 141, blade; 142, inner rotating disk; 143, support rod; 144, outer rotating disk; 145, cavity; 146, arc rod; 147, stopper; 148, return spring; 150, limit mechanism; 151, limit plate; 152, tension spring; 160. Clamp plate; 161. Connecting spring; 162. Ring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. All directional indications in the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0018] like Figure 1-Figure 4 As shown, a soil sampling device for geological exploration is provided, including a sampling drill bit 100 and a storage barrel 110 detachably connected to the sampling drill bit 100, the storage barrel 110 has a storage cavity inside, a notch on the storage barrel 110, a baffle 111 detachably connected to the storage barrel 110 is arranged at the notch, the top of the storage barrel 110 is coaxially connected to the output shaft of the motor 101, and the motor 101 is provided with a handle. When performing soil sampling, first ensure that there are no obstacles at the drilling site, the terrain is flat, and relevant markings are made, then assemble the sampling drill bit 100, the storage barrel 110, the motor 101 and other components, ensure that the connection is firm, start the equipment, aim the sampling drill bit 100 at the drilling point, and slowly descend until the target depth is reached.

[0019] When the drilled soil is in a loose state, the friction between the soil and the inner wall of the storage barrel 110 is small. After the drilling is completed, the storage barrel 110 is taken out of the ground. During this process, there is not enough friction to prevent the soil from falling off, which affects the later detection and analysis of the soil sample. Therefore, a power mechanism 120 is provided on the top of the storage barrel 110, and an iris mechanism 140 is provided between the sampling drill bit 100 and the storage barrel 110. The air transmission channel 112 opened in the storage barrel 110 connects the power mechanism 120 with the iris mechanism 140. When the drilling is completed, the power mechanism 120 is pressed to use air as power to push the iris mechanism 140 to contract. The iris mechanism 140 is used to separate the sampling drill bit 100 from the soil inside the storage barrel 110 to prevent the soil from falling off.

[0020] First, based on the above structure, combined with Figure 3 and Figure 4 The structure of the iris mechanism 140 is further disclosed as shown. The iris mechanism 140 includes a plurality of blades 141 of the same size. When the blades 141 fit together, a circular plate is formed to separate the storage cavity. The blades 141 form a fitting angle, a fixed angle and a rotation angle, wherein the fixed angle is rotationally connected to an inner turntable 142 located above the blades 141. The inner turntable 142 is fixedly connected to the storage barrel 110 above, and the inner diameter of the inner turntable 142 is the same as the inner diameter of the storage cavity. The purpose of this is that during the soil sampling process, as the saw teeth at the bottom of the sampling drill bit 100 rotate continuously, the depth of the drilled soil increases, the storage barrel 110 gradually sinks into the soil, and at the same time, the soil in the storage cavity also increases. At this time, the blades 141 are in an open state, so that the soil in the sampling drill bit 100 can smoothly enter the storage cavity for storage.

[0021] Secondly, since the loose soil has low adhesiveness and cohesion, the interaction force between soil particles is weak, resulting in an unstable soil structure. In order to pull out the storage barrel 110 after sampling and ensure the integrity of the soil inside the storage cavity, on the basis of the above structure, an outer turntable 144 is provided on the outer ring of the blade 141, which is slidably connected to the upper surface of the sampling drill bit 100. A support rod 143 is rotatably connected between the outer turntable 144 and the rotation angle. An arc rod 146 is fixedly connected to the outer turntable 144. A reset spring 148 sleeved on the arc rod 146 abuts against a stopper 147, and the other end of the arc rod 146 is fixedly connected to the stopper 147. The stopper 147 is sleeved with a cavity 145 opened inside the sampling drill bit 100. The connection between the cavity 145 and the gas transmission channel 112 is located on the side away from the reset spring 148. The specific working principle is shown as follows: After sampling, the power mechanism 120 is pressed to make the air in the air delivery channel 112 flow into the cavity 145, and the air is used as a power to overcome the elastic potential energy of the return spring 148 to push the stopper 147 to rotate counterclockwise (refer to Figure 4 As shown in the figure), as the stopper 147 drives the arc rod 146 to rotate, the outer turntable 144 rotates around the central axis of the storage chamber. Similarly, the outer turntable 144 drives the blades 141 to rotate through multiple support rods 143. The multiple blades 141 are in an open state under normal conditions, so that the soil can smoothly enter the storage chamber during the sampling process. On the contrary, as the blades 141 rotate, the soil between the sampling drill bit 100 and the storage chamber is gradually separated. When the multiple blades 141 are aligned with each other, the blades 141 support the soil in the storage chamber, thereby preventing the loose soil in the storage chamber from falling off.

[0022] Further, combined with Figure 5 and Figure 6 As shown, the specific structure of the power mechanism 120 is publicly described. The power mechanism 120 includes an upper pressing plate 121 with a through hole in the middle, and a lower pressing plate 122 fixedly connected to the bottom of the upper pressing plate 121 by a vertical rod. The upper pressing plate 121 is located above the storage barrel 110, and the vertical rod penetrates the storage barrel 110. The lower pressing plate 122 is located in the air storage cavity 113 opened inside the storage barrel 110 and is sleeved with the air storage cavity 113. The top of the air storage cavity 113 is connected to the external environment, and the bottom is connected to the air transmission channel 112. In this way, when the sampling is completed, the lower pressing plate 122 moves downward to push the air in the air storage cavity 113 to the air transmission channel 112. Figure 4 The material is delivered into the cavity 145 in order to provide a thrust for pushing the stopper 147 to move.

[0023] The upper pressing plate 121 is manually pressed for a long time to prevent the hands from getting sore and the strength of the hand getting weakened. Therefore, a collar 162 coaxially connected to the material storage barrel 110 is provided in the through hole of the upper pressing plate 121. The outer edge of the collar 162 is provided with a plurality of slots in the vertical direction. A clamping plate 160 passing through the upper pressing plate 121 is provided corresponding to the slots. The end of the clamping plate 160 has a clamping block engaged with the slot, and the other end is elastically connected to the bottom of the upper pressing plate 121 with a connecting spring 161. In this way, the clamping block is separated from the slot by pushing the clamping plate 160 to both sides. Then, after the soil in the material storage chamber is blocked, the clamping plates 160 on both sides are released. Under the elastic action of the connecting spring 161, the clamping block of the clamping plate 160 is pressed against the slot, thereby limiting the upward movement of the lower pressing plate 122.

[0024] In addition, since most of the soil samples taken out by traditional methods are in the shape of a whole cylinder, when studying the samples, if the original structure of the samples is damaged due to a mistake in taking them, it is necessary to re-sample, which affects the efficiency. For this reason, a plurality of partitions 130 are arranged in the storage cavity, and the chambers in the storage barrel 110 are divided by cross-shaped partitions 130. The angle corresponding to each chamber is the same as the angle corresponding to the notch on the storage barrel 110. The end of the partition 130 away from the central axis of the storage cavity is in contact with the inner wall of the storage cavity. The top of the partition 130 is coaxially connected to the knob 131 located inside the ring 162, and a through groove for rotating the knob 131 is provided on the ring 162 corresponding to the knob 131.

[0025] Since different soil components such as water, minerals, organic matter, etc. are unevenly distributed in the vertical or horizontal direction, the partition 130 can be set to clarify the properties of the soil in each chamber, so that the detection and analysis can be more accurate. In addition, separating the soil into different block areas can avoid mixing, which helps to retain the soil characteristics of each area during sampling and analysis. This is particularly important for analyzing areas with multiple types of soil, such as multiple layers or areas containing special minerals.

[0026] Next, when taking soil samples from different chambers, Figure 1 The baffle 111 in the chamber is opened, and the baffle 130 is driven to rotate by rotating the knob 131 to rotate the soil in the chamber to be tested to the notch for testing and analysis.

[0027] In addition, in order to avoid the soil in the storage barrel 110 from being squeezed against the inner wall, a space is usually left between the soil and the inner wall during the drilling process. After the manual drilling machine is completed, the storage barrel 110 is often placed horizontally for sampling. At this time, the loose soil will overturn to one side of the storage barrel 110, causing the relative positions of the soil particles to change, destroying the in-situ structure of the soil and affecting the accurate assessment of the soil properties.

[0028] So, below Figure 5 and Figure 6 Based on and combined with Figure 4 As shown, a limiting mechanism 150 for blocking loose soil is provided in the storage cavity inside the storage barrel 110, and a chamber connected to the air supply channel 112 is formed between the upper part of the limiting mechanism 150 and the inner wall of the storage barrel 110. By continuously pressing the power mechanism 120 to supply air to the chamber, the limiting mechanism 150 moves downward to reduce the space for overturning of the loose soil, thereby maximizing the protection of the original structure of the soil.

[0029] As mentioned above, the limiting mechanism 150 is used to limit the movement of the soil. Therefore, the structure of the limiting mechanism 150 is disclosed. The limiting mechanism 150 includes a limiting plate 151 with the same angle as the chamber. The side of the limiting plate 151 is in contact with the partition 130. A tension spring 152 is elastically connected between each limiting plate 151 and the inner wall of the storage barrel 110. On the other hand, the air storage cavity 113 is connected to the chamber by a second branch air channel 115 opened in the storage barrel 110. The second branch air channels 115 on both sides are symmetrically arranged. Each second branch air channel 115 and the first branch air channel 114 correspond to a chamber respectively, and the connection between the second branch air channel 115 and the chamber is lower than the upper surface of the limiting plate 151 in the horizontal direction. A silicone strip 116 is arranged on the inner wall of the storage cavity of the storage barrel 110 to limit the movement of the limiting plate 151.

[0030] Specifically during operation: since the first branch air channel 114 and the second branch air channel 115 are both connected to the air storage chamber 113, and the air storage chamber 113 is also connected to the air supply channel 112, when the lower pressure plate 122 moves downward, the air in the air storage chamber 113 is respectively transported to the chamber and the air supply channel 112, and at this time, the friction between the limit plate 151 and the inner wall of the storage chamber is increased by the setting of the silicone strip 116, so that the air in the air storage chamber 113 is only transported through the air supply channel 112, and the limit plate 151 maintains this position unchanged.

[0031] Before taking the soil in the chamber, release the card slot and the card block, and apply pressure to the upper pressure plate 121 again, so that the lower pressure plate 122 continues to move downward. At this time, the blades 141 have been matched with each other, and the air in the air storage chamber 113 is transported into the chamber, so that the thrust of the air on the limit plate 151 breaks through the friction between the limit plate 151 and the silicone strip 116 and the elastic potential energy of the tension spring 152, and the limit plate 151 moves closer to the soil below to prevent the soil from tipping over to one side and affecting the original structure of the soil during horizontal sampling and analysis. In addition, during the movement of the limit plate 151, the distance moved by the limit plate 151 can be observed through the transparent window on the storage barrel 110, and the position of the upper pressure plate 121 can be fixed by the card block and the card slot to prevent the limit plate 151 from excessively moving and squeezing the soil, thereby destroying the original structure of the soil.

[0032] It should be noted that: during the sampling process, in order to prevent the transparent window from being scratched, a protective plate can be set outside the transparent window to protect the transparent window. Moreover, when the soil is restricted as described above, it is aimed at the situation where the top of the soil in the chamber exceeds the upper edge of the notch of the storage barrel 110 in the horizontal direction.

[0033] Finally, the soil in the chamber is taken out for research and analysis, and then the block is restored to its original position. Under the action of elasticity, the limit plate 151 moves upward in the opposite direction, and the blade 141 opens again to clean the soil in the sampling drill bit 100 for next use.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil sampling device for geological exploration, comprising a sampling drill bit (100) and a storage barrel (110) detachably connected to the sampling drill bit (100), wherein the storage barrel (110) has a storage cavity inside, the storage barrel (110) has a notch, a baffle (111) detachably connected to the storage barrel (110) is provided at the notch, an output shaft of a motor (101) is coaxially connected to the top of the storage barrel (110), and a handle is provided on the motor (101), characterized in that: A power mechanism (120) is arranged at the top of the material storage barrel (110), and an iris mechanism (140) is arranged between the sampling drill bit (100) and the material storage barrel (110). An air delivery channel (112) provided in the material storage barrel (110) connects the power mechanism (120) and the iris mechanism (140). When drilling is finished, the power mechanism (120) is pressed to use air as a power to push the iris mechanism (140) to contract. The iris mechanism (140) is used to move the sampling drill bit (100) to the top of the material storage barrel (110). 00) is separated from the soil inside the storage barrel (110) to limit the soil from falling off, and a limiting mechanism (150) for blocking the loose soil is provided in the storage cavity inside the storage barrel (110), and a chamber connected to the air supply channel (112) is formed between the upper part of the limiting mechanism (150) and the inner wall of the storage barrel (110), and air is supplied to the chamber by continuously pressing the power mechanism (120), so that the limiting mechanism (150) moves downward to reduce the space for the loose soil to overturn.

2. A soil sampling device for geological exploration according to claim 1, characterized in that: The iris mechanism (140) comprises a plurality of blades (141) of the same size, wherein the blades (141) are matched with each other to form a circular plate that separates the material storage chamber, and the blades (141) are formed with a matching angle, a fixed angle, and a rotation angle, wherein the fixed angle is rotationally connected to an inner rotating disk (142) located above the blades (141), and the inner rotating disk (142) is fixedly connected to the material storage barrel (110) at its upper portion, and the inner diameter of the inner rotating disk (142) is the same as the inner diameter of the material storage chamber.

3. A soil sampling device for geological exploration according to claim 2, characterized in that: An outer turntable (144) is provided on the outer ring of the blade (141) and is slidably connected to the upper surface of the sampling drill bit (100). A support rod (143) is rotatably connected between the outer turntable (144) and the rotation angle. An arc-shaped rod (146) is fixedly connected to the outer turntable (144). A return spring (148) sleeved on the arc-shaped rod (146) abuts against a stopper (147), and the other end of the arc-shaped rod (146) is fixedly connected to the stopper (147). The stopper (147) is sleeved and matched with a cavity (145) provided inside the sampling drill bit (100). The connection between the cavity (145) and the gas transmission channel (112) is located on a side away from the return spring (148).

4. A soil sampling device for geological exploration according to claim 1, characterized in that: The power mechanism (120) comprises an upper pressing plate (121) having a through hole in the middle, and a lower pressing plate (122) fixedly connected to the bottom of the upper pressing plate (121) via a vertical rod, wherein the upper pressing plate (121) is located above the storage barrel (110), and the vertical rod penetrates the storage barrel (110), and the lower pressing plate (122) is located in an air storage cavity (113) provided inside the storage barrel (110) and is sleeved with the air storage cavity (113), and the top of the air storage cavity (113) is in communication with the external environment, and the bottom is in communication with the air delivery channel (112).

5. A soil sampling device for geological exploration according to claim 4, characterized in that: A collar (162) coaxially connected to the material storage barrel (110) is arranged in the through hole of the upper pressure plate (121); a plurality of slots are arranged on the outer edge of the collar (162) in the vertical direction; a clamping plate (160) passing through the upper pressure plate (121) is arranged corresponding to the slots; an end of the clamping plate (160) has a clamping block that engages with the slot; the other end of the clamping plate (160) is elastically connected to the bottom of the upper pressure plate (121) by a connecting spring (161).

6. A soil sampling device for geological exploration according to claim 5, characterized in that: A plurality of partitions (130) are arranged in the material storage cavity. The cavity in the material storage barrel (110) is divided by the cross-shaped partitions (130). The angle corresponding to each cavity is the same as the angle corresponding to the notch on the material storage barrel (110). One end of the partition (130) away from the central axis of the material storage cavity is in contact with the inner wall of the material storage cavity. The top of the partition (130) is coaxially connected to a knob (131) located inside a collar (162). A through groove for rotating the knob (131) is provided on the collar (162) corresponding to the knob (131).

7. A soil sampling device for geological exploration according to claim 6, characterized in that: The limiting mechanism (150) comprises a limiting plate (151) having the same angle as the chamber, the side of the limiting plate (151) being in contact with the partition plate (130), and a tension spring (152) being elastically connected between each limiting plate (151) and the inner wall of the storage barrel (110).

8. A soil sampling device for geological exploration according to claim 7, characterized in that: The air storage cavity (113) is connected to the chamber via a second air branch channel (115) provided in the material storage barrel (110), the second air branch channels (115) on both sides are symmetrically arranged, each second air branch channel (115) and the first air branch channel (114) respectively corresponds to a chamber, and the connection between the second air branch channel (115) and the chamber is lower than the upper surface of the limiting plate (151) in the horizontal direction, and a silicone strip (116) is arranged on the inner wall of the material storage cavity of the material storage barrel (110) to limit the movement of the limiting plate (151).

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