A soil sampling device for geological exploration

Abstract

The present application relates to geological exploration technical field, specifically, it is a kind of soil sampling device for geological exploration.The sampling drill bit and the storage cartridge that can be detachably connected with sampling drill bit are included, the storage cartridge has storage cavity inside, the notch is formed on the storage cartridge, the baffle that can be detachably connected with storage cartridge is arranged at the notch, the output shaft of motor is coaxially connected on the top of storage cartridge, handle is arranged on motor, and power mechanism is arranged on the top of storage cartridge.The elastic potential energy of reset spring is overcome by air as power to promote the anticlockwise rotation of baffle, with the rotation of baffle driving arc-shaped rod, outer turntable rotates with the central axis of storage cavity as center, similarly, outer turntable drives blade to rotate through multiple support rods, with the rotation of blade, the soil between sampling drill bit and storage cavity is gradually separated, when multiple blades mutually coincide, blade plays supporting role to soil in storage cavity, thereby prevent loose soil in storage cavity from falling off.

Description

Technical Field

[0001] This invention relates to the field of geological exploration technology, and more specifically, to a soil sampling device for geological exploration. Background Technology

[0002] In geological exploration, soil sampling is necessary for the geological area to be explored. Commonly used sampling tools include soil drills, shovels, and iron spades. The sampling depth is a crucial factor in determining soil sample collection. The sampling depth should be determined based on specific engineering requirements and exploration objectives. For example, in the study of soil mechanical properties, samples are typically collected at different depths for experimental analysis to obtain soil properties, including cohesion, adhesion, plasticity, and swelling / shrinkage.

[0003] Existing soil sampling methods are divided into manual sampling and drilling sampling. Manual sampling is suitable for shallow soils. When using drilling sampling, the soil looseness affects the sampling process. When the soil being drilled is loose, the friction between the soil and the inner wall of the sampling drill bit is small. After drilling is completed, the sampling drill bit is removed from the soil. During this process, there is not enough friction to prevent soil from falling off, which affects the subsequent testing and analysis of the soil sample. Moreover, in order to avoid the soil inside the sampling drill bit being squeezed against the inner wall, space is usually left between the soil and the inner wall during drilling. After the manual drilling is completed, the sampling drill bit is often placed horizontally. At this time, the loose soil will tilt to one side of the sampling drill bit, causing the relative position between soil particles to change, destroying the in-situ structure of the soil, and affecting the accurate assessment of soil properties. Summary of the Invention

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

[0005] To address the aforementioned technical problems, this invention provides a soil sampling device for geological exploration, comprising a sampling drill bit and a storage cylinder detachably connected to the sampling drill bit. The storage cylinder has a storage cavity inside and a notch. A baffle detachably connected to the storage cylinder is provided at the notch. An output shaft of a motor is coaxially connected to the top of the storage cylinder, and a handle is provided on the motor. A power mechanism is provided at the top of the storage cylinder. An iris mechanism is provided between the sampling drill bit and the storage cylinder. An air supply channel opened inside the storage cylinder supplies air to the power mechanism. The structure is connected to the iris mechanism. When drilling ends, pressing the power mechanism uses 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 cylinder to limit soil shedding. The storage chamber inside the storage cylinder is equipped with a limiting mechanism to block loose soil. A chamber connected to the air supply channel is formed between the upper part of the limiting mechanism and the inner wall of the storage cylinder. By continuously pressing the power mechanism to supply air to the chamber, the limiting mechanism moves downward to reduce the space for the loose soil to overturn.

[0006] As a further improvement to this technical solution, the iris mechanism includes several blades of the same size. When the blades fit together, they form a circular plate that divides the storage chamber. The blades have a fitting angle, a fixed angle, and a rotation angle. The fixed angle is rotatably connected to an inner turntable located above the blade. The inner turntable is fixedly connected to the storage cylinder above, and the inner diameter of the inner turntable is the same as the inner diameter of the storage chamber.

[0007] As a further improvement to this technical solution, an outer turntable is provided on the outer ring of the blade and slidably connected to the upper surface of the sampling drill bit. A support rod is rotatably connected between the outer turntable and the rotation angle. An arc-shaped rod is fixedly connected to the outer turntable. A return spring sleeved on the arc-shaped rod abuts against a stop block, and the other end of the arc-shaped rod is fixedly connected to the stop block. The stop block is sleeved and fitted with a cavity opened inside the sampling drill bit. The connection between the cavity and the gas delivery channel is located on the side away from the return spring.

[0008] As a further improvement to this 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 cylinder, and the vertical rod passes through the storage cylinder. The lower pressure plate is located in the air storage cavity opened inside the storage cylinder 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 delivery channel.

[0009] As a further improvement to this technical solution, a collar coaxially connected to the storage cylinder is provided in the through hole of the upper pressure plate. Multiple slots are provided on the outer edge of the collar in the vertical direction. A card plate is provided corresponding to the slots to pass through the upper pressure plate. The end of the card plate has a card block that engages with the slot, and the other end is elastically connected to the bottom of the upper pressure plate with a connecting spring.

[0010] As a further improvement to this technical solution, multiple baffles are set in the storage cavity. The chambers inside the storage cylinder are divided by cross-shaped baffles. The angle corresponding to each chamber is the same as the angle corresponding to the notch on the storage cylinder. The end of the baffle away from the central axis of the storage cavity is attached to the inner wall of the storage cavity. The top of the baffle is coaxially connected to a knob located inside the collar. A through groove for rotating the knob is opened on the collar corresponding to the knob.

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

[0012] As a further improvement to this technical solution, a second air channel is provided between the gas storage chamber and the storage cylinder. The second air channels on both sides are symmetrically arranged. Each second air channel and the first air channel correspond to a chamber. The connection between the second air channel and the chamber is lower than the upper surface of the limiting plate in the horizontal direction. A silicone strip is provided on the inner wall of the storage chamber of the storage cylinder to restrict the movement of the limiting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. In this soil sampling device for geological exploration, air is used as a power source to overcome the elastic potential energy of the reset spring and drive the stop block to rotate counterclockwise. As the stop block drives the arc rod to rotate, the outer turntable rotates around the central axis of the storage chamber. Similarly, the outer turntable drives the blades to rotate through multiple support rods. As the blades rotate, they gradually separate the soil between the sampling drill bit and the storage chamber. When multiple blades fit together, the blades support the soil in the storage chamber, thereby preventing the loose soil in the storage chamber from falling off.

[0015] 2. In this soil sampling device for geological exploration, the slot and the block are released, and pressure is applied to the upper pressure plate again, causing the lower pressure plate to continue moving downward. At this time, the blades are already in contact with each other, and the air in the air storage chamber is transported into the chamber. This causes the air to push against the limiting plate, breaking through the friction between the limiting plate and the silicone strip and the elastic potential energy of the tension spring. The limiting plate moves closer to the soil below, so as to prevent the soil from tilting to one side and affecting the original structure of the soil during horizontal sampling and analysis. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the sampling drill bit and storage cylinder of the present invention;

[0018] Figure 3This is a schematic diagram of the connection structure of the blade, inner turntable, inner turntable and outer turntable of the present invention;

[0019] Figure 4 This is a top view of the cross-sectional structure of the storage cylinder of the present invention;

[0020] Figure 5 This is a partial cross-sectional view of the storage cylinder of the present invention;

[0021] Figure 6 This is a front view of the partially cut internal structure of the storage cylinder of the present invention;

[0022] Figure 7 This is a partial cross-sectional left view of the storage cylinder of the present invention.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 100. Sampling drill bit; 101. Motor; 110. Storage cylinder; 111. Baffle; 112. Air supply channel; 113. Air storage chamber; 114. First air channel; 115. Second air channel; 116. Silicone strip;

[0025] 120. Power mechanism; 121. Upper pressure plate; 122. Lower pressure plate;

[0026] 130. Partition; 131. Knob;

[0027] 140. Iris recognition mechanism; 141. Blade; 142. Inner turntable; 143. Support rod; 144. Outer turntable; 145. Cavity; 146. Arc-shaped rod; 147. Stop block; 148. Return spring;

[0028] 150. Limiting mechanism; 151. Limiting plate; 152. Tension spring;

[0029] 160. Clamping plate; 161. Connecting spring; 162. Collar. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All directional indicators (such as up, down, left, right, front, back, etc.) in the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly.

[0031] like Figures 1-4As shown, a soil sampling device for geological exploration is provided, including a sampling drill bit 100 and a storage cylinder 110 detachably connected to the sampling drill bit 100. The storage cylinder 110 has a storage chamber inside and a notch on it. A baffle 111 detachably connected to the storage cylinder 110 is provided at the notch. The output shaft of a motor 101 is coaxially connected to the top of the storage cylinder 110. A handle is provided on the motor 101. When sampling soil, first ensure that there are no obstacles at the drilling site, the terrain is flat, and relevant markings are made. Then, assemble the components such as the sampling drill bit 100, the storage cylinder 110, and the motor 101, ensuring that the connection is firm. Start the equipment, align the sampling drill bit 100 with the drilling point, and slowly lower it until the target depth is reached.

[0032] When the drilled soil is in a loose state, the friction between the soil and the inner wall of the storage cylinder 110 is small. After drilling is completed, the storage cylinder 110 is removed from the soil. During this process, there is not enough friction to prevent the soil from falling off, which affects the subsequent detection and analysis of the soil sample. Therefore, a power mechanism 120 is set at the top of the storage cylinder 110, and an iris mechanism 140 is set between the sampling drill bit 100 and the storage cylinder 110. An air supply channel 112 opened in the storage cylinder 110 connects the power mechanism 120 and the iris mechanism 140. When drilling is finished, pressing the power mechanism 120 uses 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 cylinder 110 to limit the soil from falling off.

[0033] First, based on the above structure, combined with Figure 3 and Figure 4 The diagram further discloses the structure of the iris mechanism 140, which includes several blades 141 of the same size. When the blades 141 are engaged, they form a circular plate that divides the storage chamber. The blades 141 have engagement angles, a fixed angle, and a rotation angle. The fixed angle is rotatably connected to an inner turntable 142 located above the blades 141. The inner turntable 142 is fixedly connected to the storage cylinder 110, and its inner diameter is the same as the inner diameter of the storage chamber. This is done so that during soil sampling, as the bottom teeth of the sampling drill bit 100 rotate continuously, the drilling depth increases, and the storage cylinder 110 gradually sinks into the soil. Simultaneously, the soil in the storage chamber also increases. At this time, the blades 141 are in an open state, allowing the soil inside the sampling drill bit 100 to smoothly enter the storage chamber for storage.

[0034] Secondly, because loose soil has low cohesion and low cohesion, the interaction force between soil particles is weak, resulting in an unstable soil structure. In order to remove the storage cylinder 110 after sampling and to ensure the integrity of the soil inside the storage chamber, 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 stop block 147, and the other end of the arc-shaped rod 146 is fixedly connected to the stop block 147. The stop block 147 is fitted into a cavity 145 opened inside the sampling drill bit 100. The connection between the cavity 145 and the air delivery channel 112 is located on the side away from the return spring 148. The specific working principle is shown below:

[0035] After sampling, pressing the power mechanism 120 causes air inside the air supply channel 112 to flow into the cavity 145. This air, acting as a power source, overcomes the elastic potential energy of the return spring 148, causing the stop block 147 to rotate counterclockwise (see reference). Figure 4 As shown, as the stop block 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 normally in the open state so that the soil can smoothly enter the storage chamber during the sampling process. Conversely, as the blades 141 rotate, they gradually separate the soil between the sampling drill bit 100 and the storage chamber. When the multiple blades 141 match each other, the blades 141 support the soil in the storage chamber, thereby preventing the loose soil in the storage chamber from falling off.

[0036] Furthermore, in combination Figure 5 and Figure 6 As shown, the specific structure of the power mechanism 120 is disclosed. The power mechanism 120 includes an upper pressure plate 121 with a through hole in the middle, and a lower pressure plate 122 fixedly connected to the bottom of the upper pressure plate 121 by a vertical rod. The upper pressure plate 121 is located above the storage cylinder 110, and the vertical rod passes through the storage cylinder 110. The lower pressure plate 122 is located in the air storage cavity 113 opened inside the storage cylinder 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 delivery channel 112. In this way, after sampling is completed, the lower pressure plate 122 moves downward to deliver the air in the air storage cavity 113 to the air delivery channel 112. Figure 4 It is conveyed in the cavity 145 to provide thrust for moving the stop 147.

[0037] Considering that after sealing the soil in the storage chamber, it is necessary to manually press the upper pressure plate 121 for a long time, which may easily lead to hand fatigue and weakening of strength, a collar 162 coaxially connected to the storage cylinder 110 is provided in the through hole of the upper pressure plate 121. Multiple slots are provided on the outer edge of the collar 162 in the vertical direction. Corresponding to the slots, a plate 160 is provided to pass through the upper pressure plate 121. The end of the plate 160 has a locking block that engages with the slot, and the other end is elastically connected to the bottom of the upper pressure plate 121 with a connecting spring 161. Thus, by pushing the plate 160 to both sides, the locking block is separated from the slot. Then, after the soil in the storage chamber is sealed, the plate 160 on both sides is released. Under the elastic action of the connecting spring 161, the locking block of the plate 160 abuts against the slot, thereby restricting the upward movement of the lower pressure plate 122.

[0038] Furthermore, since soil samples obtained using traditional methods are mostly cylindrical, if the original structure of the sample is damaged due to handling errors during the study, the sampling process needs to be repeated, affecting efficiency. To address this, multiple partitions 130 are installed inside the storage chamber. The chambers inside the storage cylinder 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 cylinder 110. The end of the partition 130 away from the central axis of the storage chamber is attached to the inner wall of the storage chamber. The top of the partition 130 is coaxially connected to a knob 131 located inside the collar 162. A through groove is provided on the collar 162 corresponding to the knob 131 for rotating the knob 131.

[0039] Because different soil components, such as moisture, minerals, and organic matter, are unevenly distributed vertically or horizontally, the partition 130 clearly defines the soil properties in each chamber, making detection and analysis more accurate. Furthermore, dividing the soil into different block areas prevents mixing, which helps preserve the soil characteristics of each area during sampling and analysis. This is particularly important for analyzing areas with multiple soil types, such as multi-layered soils or areas containing specific minerals.

[0040] Next, when taking soil samples from different chambers, Figure 1 When the baffle 111 is opened, the partition 130 is rotated by rotating the knob 131, which rotates the soil in the chamber to be tested to the opening for testing and analysis.

[0041] In addition, to avoid the soil inside the storage cylinder 110 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 is completed, the storage cylinder 110 is often placed horizontally before sampling. At this time, the loose soil will tilt to one side of the storage cylinder 110, causing the relative position between soil particles to change, destroying the in-situ structure of the soil, and affecting the accurate assessment of soil properties.

[0042] So, below Figure 5 and Figure 6 Based on and combined Figure 4 As shown, a limiting mechanism 150 for blocking loose soil is provided in the storage cavity inside the storage cylinder 110. A chamber communicating with the air supply channel 112 is formed between the upper part of the limiting mechanism 150 and the inner wall of the storage cylinder 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 the loose soil to overturn, thereby maximizing the preservation of the soil's in-situ structure.

[0043] As described above, the limiting mechanism 150 is used to restrict 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 attached to the partition 130. Each limiting plate 151 is elastically connected to the inner wall of the storage cylinder 110 by a tension spring 152. On the other hand, the air storage chamber 113 is connected to the chamber by a second air channel 115 opened in the storage cylinder 110. The two second air channels 115 are symmetrically arranged. Each second air channel 115 and the first air channel 114 correspond to a chamber. The connection between the second 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 provided on the inner wall of the storage chamber of the storage cylinder 110 to restrict the movement of the limiting plate 151.

[0044] Specifically, during operation: Since the first air channel 114 and the second air channel 115 are both connected to the air storage chamber 113, and the air storage chamber 113 is also connected to the air delivery channel 112, when the pressure plate 122 moves downward, the air in the air storage chamber 113 is delivered to the chamber and the air delivery channel 112 respectively. At this time, the setting of the silicone strip 116 increases the friction between the limiting plate 151 and the inner wall of the storage chamber. In this way, the air in the air storage chamber 113 is only delivered through the air delivery channel 112, while the limiting plate 151 remains in the same position.

[0045] Before taking soil from the chamber, the slots and blocks are released, and pressure is applied downwards to the upper pressure plate 121 again, causing the lower pressure plate 122 to continue moving downwards. At this time, the blades 141 are already in contact with each other, and air from the air storage chamber 113 is delivered into the chamber. This causes the air's thrust on the limiting plate 151 to overcome the friction between the limiting plate 151 and the silicone strip 116, as well as the elastic potential energy of the tension spring 152. The limiting plate 151 moves closer to the soil below, preventing the soil from tilting to one side and affecting its original structure during horizontal sampling and analysis. Furthermore, during the movement of the limiting plate 151, the distance it moves can be observed through the transparent window on the storage cylinder 110, and the position of the upper pressure plate 121 can be fixed by the blocks and slots to prevent excessive movement of the limiting plate 151 from squeezing the soil and damaging its original structure.

[0046] It should be noted that during the sampling process, in order to prevent the transparent window from being scratched, a protective plate can be installed outside the transparent window to protect it. Moreover, the above-mentioned restrictions on the soil apply to the situation where the top of the soil in the chamber exceeds the upper edge of the notch of the storage cylinder 110 in the horizontal direction.

[0047] Finally, the soil in the chamber was removed for study and analysis. Then, the block was returned to its original position. Under the action of elasticity, the limiting plate 151 moved upward in the opposite direction, and the blade 141 opened again to clean the soil in the sampling drill bit 100 for the next use.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil sampling device for geological exploration, comprising a sampling drill bit and a storage cylinder detachably connected to the sampling drill bit, the storage cylinder having a storage cavity inside, a notch on the storage cylinder, a baffle detachably connected to the storage cylinder at the notch, and an output shaft of a motor coaxially connected to the top of the storage cylinder, the motor having a handle, characterized in that: The power mechanism is arranged at the top of the storage cylinder, the iris mechanism is arranged between the sampling drill bit and the storage cylinder, the gas conveying passage arranged in the storage cylinder is communicated with the power mechanism and the iris mechanism, when the drilling is completed, the power mechanism is pressed to push the iris mechanism to shrink by using air as power, the iris mechanism is used for separating the sampling drill bit from the soil in the storage cylinder to limit the falling of the soil, and the limiting mechanism for blocking the loose soil is arranged in the storage cavity in the storage cylinder, a first chamber communicated with the gas conveying passage is formed between the limiting mechanism and the inner wall of the storage cylinder, air is continuously conveyed to the first chamber by continuously pressing the power mechanism, and the limiting mechanism is moved downward to reduce the space for overturning of the loose soil; The power mechanism comprises an upper pressing plate with a through hole in the middle, and a lower pressing plate fixedly connected with the upper pressing plate through a vertical rod, the upper pressing plate is located above the storage cylinder, the vertical rod penetrates the storage cylinder, and the lower pressing plate is located in the gas storage cavity arranged in the storage cylinder and is sleeved with the gas storage cavity, the top of the gas storage cavity is communicated with the external environment, and the bottom is communicated with the gas conveying passage; A plurality of partition plates are arranged in the storage cavity, and the second chambers in the storage cylinder are divided by the cross-shaped partition plates, the angle of each second chamber is the same as the angle corresponding to the notch on the storage cylinder, and the end of the partition plate away from the axis of the storage cavity is attached to the inner wall of the storage cavity; The iris mechanism comprises a plurality of blades with the same size, the blades are mutually matched to form a circular plate for separating the storage cavity, the blades are formed with a matching angle, a fixed angle and a rotating angle, the fixed angle is rotatably connected with an inner rotating disc above the blades, the inner rotating disc is fixedly connected with the storage cylinder, and the inner diameter of the inner rotating disc is the same as the inner diameter of the storage cavity; An outer rotating disc is arranged on the outer circle of the blade and is slidably connected with the upper surface of the sampling drill bit, a support rod is rotatably connected between the outer rotating disc and the rotating angle, an arc-shaped rod is fixedly connected to the outer rotating disc, a reset spring sleeved on the arc-shaped rod abuts against a stop block, the other end of the arc-shaped rod is fixedly connected with the stop block, the stop block is sleeved with a cavity arranged in the storage cylinder, and the connection position of the cavity and the gas conveying passage is located on the side away from the reset spring; A sleeve ring coaxially connected with the storage cylinder is arranged in the through hole of the upper pressing plate, a plurality of clamping grooves are arranged on the outer edge of the sleeve ring in the vertical direction, a clamping plate penetrating the upper pressing plate is arranged corresponding to the clamping grooves, the end of the clamping plate is provided with a clamping block matched with the clamping grooves, and the other end is elastically connected with the bottom of the upper pressing plate through a connecting spring; The limiting mechanism comprises limiting plates with the same angle as the second chambers, the side edges of the limiting plates are attached to the partition plates, and a stretching spring is elastically connected between each limiting plate and the inner wall of the storage cylinder.

2. The soil sampling device for geological exploration according to claim 1, characterized in that: The top of the partition plate is coaxially connected with a knob arranged in the inner part of the sleeve ring, and a through groove for rotating the knob is arranged on the sleeve ring corresponding to the knob.

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