Hydrogeological sampling device

Abstract

The invention discloses a hydrogeological sampling device and belongs to the technical field of hydrogeological sampling devices. The hydrogeological sampling device comprises a hand lever, the lower end of the hand lever is fixedly connected with a cylinder, at least one storage groove is formed in the side wall of the cylinder, a sampling rod is rotatably connected into the storage groove, and a rotating shaft of the sampling rod is provided with a first torsional spring and a damper; a limiting device is arranged in the cylinder body and is used for limiting and releasing the sampling rod from rotating out of the accommodating groove; a sampling barrel is arranged at the end of the sampling rod, and an extraction device is arranged in the sampling barrel. Samples on the side wall of an underground karst cave can be conveniently obtained, and soft mud or water can conveniently enter the sampling barrel through the suction effect.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogeological sampling devices, in particular to a hydrogeological sampling device. Background Art

[0002] Hydrogeology is a branch of geology, referring to the various changes and movements of groundwater in nature. It mainly studies the distribution and formation of groundwater, the physical properties and chemical composition of groundwater, groundwater resources and their rational utilization.

[0003] The hydrogeological sampling device with the prior art patent document publication number CN114076693A adopts a vertical operating rod and a sampling barrel. A frame is provided at the lower end of the operating rod. A plurality of sampling barrels are provided and are detachably vertically assembled at the lower end of the frame. The upper and lower ends of the sampling barrel are open, and a sample retention structure is provided in the inner cavity thereof for obtaining geological samples after the sampling barrel is inserted into the ground.

[0004] On the one hand, the sampling device retains air inside the sampling tube, making it difficult for soil to enter the sampling tube, and on the other hand, it is difficult to enter underground areas such as underground cavities and karst caves for sampling. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a hydrogeological sampling device, thereby solving the problems of the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hydrogeological sampling device, comprising a hand lever, the lower end of which is fixedly connected to a cylinder, the side wall of which is provided with at least one receiving groove, a sampling rod is rotatably connected in the receiving groove, a first torsion spring and a damper are provided on the rotating shaft of the sampling rod, a limit device is provided in the cylinder, and the limit device limits and releases the sampling rod from rotating out of the receiving groove;

[0008] A sampling barrel is arranged at the end of the sampling rod, and an extraction device is arranged in the sampling barrel.

[0009] Preferably, the limiting device includes a limiting rotating rod, which is coaxially rotatably connected in the hand rod, the upper end of the limiting rotating rod extends out of the hand rod and is fixedly connected to the rotating column, the outer wall of the limiting rotating rod is fixedly connected to the limiting cross bar, an annular avoidance groove is arranged inside the cylinder body, the limiting cross bar is located in the annular avoidance groove, and a slot is arranged at one end of the sampling rod, and the slot is adapted to the limiting cross bar.

[0010] Preferably, a mounting groove is provided at the end of the sampling rod, and the mounting groove is rotatably connected to the sampling barrel through a built-in motor. The extraction device includes a piston, and the piston is slidably connected to the sampling barrel. One side of the piston is fixedly connected to a pull rod, and the pull rod forms axial movement through a toggle structure.

[0011] Preferably, the toggle structure comprises an arcuate groove, the distance between one end of the arcuate groove and the sampling tube shaft is smaller than the distance between the other end of the arcuate groove, the pull rod is rotatably connected to the cylinder, and one end of the cylinder is located in the arcuate groove.

[0012] Preferably, the lower end of the sampling tube is rotatably connected to the inner tube, one side of the pull rod is fixedly connected to the support rod, the end of the support rod is rotatably connected to the ball, a spiral groove is arranged on the inner wall of the sampling tube, the ball is located in the spiral groove, a blocking plate is arranged at the lower end of the inner tube, the blocking plate is arranged with a mud inlet hole, and crushing teeth are evenly arranged at the bottom of the blocking plate.

[0013] Preferably, at least one retraction groove is provided on the inner arc surface of the arc groove, a first spring is fixedly connected between the pull rod and the sampling tube, a one-way valve is provided on the mud inlet hole, an exhaust hole is provided on the piston, and an exhaust valve is provided on the exhaust hole.

[0014] Preferably, the sampling rod is composed of at least two hinged rods, and each hinge axis is provided with a damper. The hinged rod for installing the sampling tube is an electric telescopic structure and the bottom is fixedly connected to the pressure sensor on both sides of the installation groove, and the end of the hinged rod for installing the sampling tube is fixedly connected to the counterweight block.

[0015] The advantages of the present invention are as follows: a hydrogeological sampling device provided by the present invention cooperates with a geological radar to drill a vertical or inclined pre-drilled hole on the ground, the sampling rod is first folded in a cylinder to form a rod-shaped structure, and is inserted into an underground cave through the vertical or inclined pre-drilled hole, the lower end of the cylinder contacts the bottom of the underground cave, the sampling rod slowly unfolds and extracts the mud or water on the side wall of the underground cave through the sampling tube and the extraction device at the end.

[0016] The sampling rod is composed of at least two hinged rods hinged together and an angle structure is formed by a damper and gravity. The more angles there are, the more it fits the side wall structure of the underground cave. After the pressure values ​​of the pressure sensors on both sides are stable, the sampling tube extracts the mud or water in the area, which can facilitate the acquisition of samples on the side wall of the underground cave, and the suction effect facilitates the mud or water to enter the sampling tube.

[0017] The present invention uses the piston to perform unidirectional suction through the mud inlet hole under the upward action of the pull rod. When the cylinder of the pull rod falls into the return groove, the piston falls back under the action of the first spring to squeeze the cavity between the blocking plate and the piston, and the gas that may be drawn in is discharged through the unidirectional exhaust hole, thereby making the extracted sample more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a basic structural schematic diagram of the present invention;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0020] Figure 3 yes Figure 2 A local enlarged view of point E in FIG.

[0021] Figure 4 is a schematic diagram of the state of the sampling rod of the present invention after being unfolded;

[0022] Figure 5 yes Figure 4 A local enlarged view of point F in FIG.

[0023] Figure 6 It is a schematic diagram of the state after the present invention is lifted;

[0024] Figure 7 It is a schematic diagram of the working state of the present invention in underground cave sampling. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Implementation Method 1

[0027] like Figures 1 to 7 As shown, the present invention provides a hydrogeological sampling device, including a handle 1, the lower end of which is fixedly connected to a cylinder 2, and the side wall of the cylinder 2 is provided with at least one receiving groove 21, and the receiving groove 21 is rotatably connected to a sampling rod 3, as shown in FIG. Figure 7 As shown, two sampling rods 3 are provided, and the two sampling rods 3 have different lengths and are used to obtain samples at different positions of the underground cave. The rotating shaft of the sampling rod 3 is provided with a first torsion spring and a damper, and the damper makes the sampling rod 3 rotate slowly. The damper is a common structure, such as a rubber ring is provided on the rotating shaft of the sampling rod 3, and the rotation speed is reduced by friction resistance. A limit device is provided in the cylinder 2, and the limit device limits and releases the sampling rod 3 from rotating out of the storage groove 21;

[0028] A sampling tube 5 is arranged at the end of the sampling rod 3, and an extraction device is arranged inside the sampling tube 5.

[0029] The sampling rod 3 is composed of at least two hinged rods 311, and each hinge axis is provided with a damper. The hinged rod 311 for installing the sampling tube 5 is an electric telescopic structure and the bottom is fixedly connected to the pressure sensor 312 on both sides of the installation groove 31, and the end of the hinged rod 311 for installing the sampling tube 5 is fixedly connected to the counterweight block.

[0030] The present invention cooperates with a geological radar, the use of which belongs to the prior art. The geological radar detects the range of underground caves and adjusts the use status of the present invention in a targeted manner. For example, a vertical or inclined pre-drilled hole 10 is drilled on the ground, and the sampling rod 3 is first folded in the cylinder 2 to form a rod-shaped structure, and then inserted into the underground cave through the vertical or inclined pre-drilled hole 10. The lower end of the cylinder 2 contacts the bottom of the underground cave, and the sampling rod 3 slowly unfolds and extracts the mud or water on the side wall of the underground cave through the sampling tube 5 at the end and the extraction device.

[0031] The sampling rod 3 is composed of at least two hinged rods 311 that are hinged and form an angle structure through a damper and gravity. The more angles there are, the more it fits the side wall structure of the underground cave. After the pressure values ​​of the pressure sensors 312 on both sides are stable, the sampling tube 5 extracts the mud or water in the area, which can facilitate the acquisition of samples on the side wall of the underground cave, and the suction effect facilitates the mud or water to enter the sampling tube 5.

[0032] When taking out, the sampling rod 3 is in a Figure 6 In the state shown, it can be easily taken out from the pre-drilled hole 10.

[0033] Implementation Method 2

[0034] like Figures 1 to 7 As shown, the limiting device includes a limiting rotating rod 41, which is coaxially rotatably connected in the hand lever 1, the upper end of the limiting rotating rod 41 extends out of the hand lever 1 and is fixedly connected to the rotating column 42, the outer wall of the limiting rotating rod 41 is fixedly connected to the limiting cross bar 43, an annular avoidance groove 44 is arranged inside the cylinder 2, the limiting cross bar 43 is located in the annular avoidance groove 44, and a clamping groove 45 is arranged at one end of the sampling rod 3, and the clamping groove 45 is adapted to the limiting cross bar 43. When the sampling rod 3 needs to be unfolded, by rotating the limiting rotating rod 41, the limiting cross bar 43 rotates in the annular avoidance groove 44 and disengages from the clamping groove 45, and the sampling rod 3 gradually rotates out of the storage groove 21 after losing the limit.

[0035] Implementation 3

[0036] like Figures 1 to 7 As shown, a mounting groove 31 is provided at the end of the sampling rod 3, and the mounting groove 31 is connected to the sampling tube 5 by rotation through a built-in motor. The extraction device includes a piston 51, and the piston 51 is slidably connected inside the sampling tube 5. One side of the piston 51 is fixedly connected to a pull rod 52, and the pull rod 52 forms an axial movement through a toggle structure. The toggle structure adopts a conventional structure such as an electric push rod to realize the suction of the sampled sludge; due to the swing of the sampling tube 5, the end of the sampling tube 5 is easy to sink into the sludge to avoid empty suction.

[0037] The conventional toggle structure cannot achieve the exhaust function. Therefore, the toggle structure further disclosed in the present invention includes an arc groove 53. The distance between one end of the arc groove 53 and the rotating shaft of the sampling tube 5 is smaller than the distance between the other end of the arc groove 53. The pull rod 52 is rotatably connected to the cylinder 521. One end of the cylinder 521 is located in the arc groove 53. When the sampling tube 5 rotates, the cylinder 521 slides from one end to the other end in the arc groove 53. Since the distances between the two ends of the arc groove 53 are different, the pull rod 52 is pulled.

[0038] The lower end of the sampling tube 5 is rotatably connected to the inner tube 54, one side of the pull rod 52 is fixedly connected to the support rod 55, the end of the support rod 55 is rotatably connected to the ball 56, the inner wall of the sampling tube 5 is provided with a spiral groove 57, the ball 56 is located in the spiral groove 57, the lower end of the inner tube 54 is provided with a plugging plate 58, the plugging plate 58 is provided with a mud inlet hole 59, and crushing teeth are evenly arranged on the bottom of the plugging plate 58. When the pull rod 52 pulls the piston 51, the inner tube 54 can rotate due to the action of the ball 56 and the spiral groove 57, and the crushing teeth crush the hard mud blocks that may appear in the soft mud, so that the sample taken out not only contains soft mud or water, but also obtains some hard soil, thereby facilitating the diversity of subsequent sample analysis.

[0039] Since the sampling tube 5 absorbs mud or water during rotation, some air will enter the sampling tube 5 and occupy space, resulting in insufficient sampling volume. Therefore, the present invention further discloses that at least one return groove 531 is arranged on the inner arc surface of the arc groove 53, and the contour of the return groove 531 is larger than the diameter of the cylinder 521. A first spring 532 is fixedly connected between the pull rod 52 and the sampling tube 5. A one-way valve 59 is arranged on the mud inlet hole 59, and an exhaust hole 6 is arranged on the piston 51. An exhaust valve is arranged on the exhaust hole 6. Both the exhaust valve and the one-way valve 59 are prior art, and are made of elastic rubber. The structure is a one-way medium flow restriction structure such as a heart valve, and mud and water can only enter between the blocking plate 58 and the piston 51.

[0040] Under the upward action of the pull rod 52, the piston 51 performs unidirectional suction through the mud inlet hole 59. When the cylinder 521 of the pull rod 52 falls into the return groove 531, the piston 51 falls back and squeezes the cavity between the blocking plate 58 and the piston 51 under the action of the first spring 532, and the gas that may be drawn in is discharged through the unidirectional exhaust hole 6, so that the extracted sample is more sufficient.

[0041] 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 hydrogeological sampling device, comprising a handle (1), the lower end of the handle (1) being fixedly connected to a cylinder (2), the side wall of the cylinder (2) being provided with at least one receiving groove (21), the receiving groove (21) being rotatably connected to a sampling rod (3), characterized in that: The rotating shaft of the sampling rod (3) is provided with a first torsion spring and a damper, and a limiting device is provided in the cylinder (2), which limits and releases the sampling rod (3) from rotating out of the storage groove (21); A sampling barrel (5) is arranged at the end of the sampling rod (3), and an extraction device is arranged inside the sampling barrel (5).

2. A hydrogeological sampling device according to claim 1, characterized in that: The limiting device comprises a limiting rotating rod (41), the limiting rotating rod (41) is coaxially rotatably connected in the hand lever (1), the upper end of the limiting rotating rod (41) extends out of the hand lever (1) and is fixedly connected to the rotating column (42), the outer wall of the limiting rotating rod (41) is fixedly connected to the limiting cross bar (43), an annular avoidance groove (44) is arranged inside the cylinder (2), the limiting cross bar (43) is located in the annular avoidance groove (44), and a clamping groove (45) is arranged at one end of the sampling rod (3), and the clamping groove (45) is adapted to the limiting cross bar (43).

3. A hydrogeological sampling device according to claim 1, characterized in that: The end of the sampling rod (3) is provided with a mounting groove (31), and the mounting groove (31) is rotatably connected to the sampling barrel (5) through a built-in motor. The extraction device comprises a piston (51), and the sampling barrel (5) is slidably connected to the piston (51). One side of the piston (51) is fixedly connected to a pull rod (52), and the pull rod (52) forms an axial movement through a toggle structure.

4. A hydrogeological sampling device according to claim 3, characterized in that: The toggle structure comprises an arcuate groove (53), wherein the distance between one end of the arcuate groove (53) and the rotating shaft of the sampling tube (5) is smaller than the distance between the other end of the arcuate groove (53), and the pull rod (52) is rotatably connected to the cylinder (521), and one end of the cylinder (521) is located in the arcuate groove (53).

5. A hydrogeological sampling device according to claim 4, characterized in that: The lower end of the sampling tube (5) is rotatably connected to the inner tube (54), one side of the pull rod (52) is fixedly connected to the support rod (55), the end of the support rod (55) is rotatably connected to the ball (56), the inner wall of the sampling tube (5) is provided with a spiral groove (57), the ball (56) is located in the spiral groove (57), the lower end of the inner tube (54) is provided with a blocking plate (58), the blocking plate (58) is provided with a mud inlet hole (59), and crushing teeth are evenly arranged at the bottom of the blocking plate (58).

6. A hydrogeological sampling device according to claim 5, characterized in that: At least one retraction groove (531) is arranged on the inner arc surface of the arc groove (53); a first spring (532) is fixedly connected between the pull rod (52) and the sampling tube (5); a one-way valve (59) is arranged on the mud inlet hole (59); an exhaust hole (6) is arranged on the piston (51); and an exhaust valve is arranged on the exhaust hole (6).

7. A hydrogeological sampling device according to claim 1, characterized in that: The sampling rod (3) is composed of at least two hinged rods (311) hinged together, and each hinged shaft is provided with a damper. The hinged rod (311) for mounting the sampling tube (5) is an electric telescopic structure and the bottom is fixedly connected to the pressure sensor (312) on both sides of the mounting groove (31). The end of the hinged rod (311) for mounting the sampling tube (5) is fixedly connected to a counterweight block.

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