CN105486539A - Cohesionless soil sampling apparatus - Google Patents

Abstract

The invention discloses a non-cohesive soil sampling device, which comprises a cylindrical sampling cylinder, and the sampling cylinder comprises a sampling top and a sampling bottom which are connected to each other through threads, and the sampling bottom is provided with a fixed baffle and a movable baffle The fixed block is fixedly arranged on the inner wall of the sampling bottom, the movable block is connected to the fixed block through a central rotating shaft, and the movable block is located below the fixed block, the The central rotating shaft is arranged coaxially with the sampling cylinder, the top surface of the fixed block is composed of two fan-shaped plates symmetrical to the central rotating shaft, the radians of the two fan-shaped plates are both 90°, and the movable block The structure of the sheet is the same as that of the top surface of the fixed block, and the top surface of the movable block and the fixed block are both perpendicular to the central axis of rotation. The invention can conveniently close the bottom of the sampling cylinder without loss of sampling volume, thereby improving the accuracy of soil layer sampling and analysis work.

Description

A non-cohesive soil sampling device

technical field

The invention relates to a non-cohesive soil sampling device, which belongs to the technical field of soft and low-cohesion soil layer sampling equipment.

Background technique

Fly ash and coal gangue solid waste generated during the operation of thermal power plants and coal mines are often used to fill subsidence areas of coal mines, and the surface is covered with soil and then the land is reclaimed. In order to understand the changes in the physical and chemical properties of the filling material and soil layer in the subsidence area, it is necessary to conduct section sampling, and then perform physical and chemical analysis on the samples taken out layer by layer with the sampling shovel. Because the fly ash and coal gangue weathering filling layer is relatively soft and has low cohesiveness, and the existing sampler has a simple structure, most of which are bottom hinge closed structures, during the lifting process, the samples in the sampler will fall under the action of gravity , resulting in fewer samples taken and less obvious stratification, etc., even if some remain in the sampler, it will affect the judgment of technicians.

For this reason, Chinese patent document CN104849092A discloses a kind of sandy soil type saline-alkali soil layer sampler and it mainly comprises sampling shovel, and sampling shovel is the tubular body of inner hollow, and the bottom of sampling shovel is provided with tapered shovel mouth, and sampling shovel top connection part, connects There is a pressure rod at the bottom, and a block is provided at the connection between the mouth of the shovel and the sampling shovel, and the block is located on the inner wall of the sampling shovel and is hinged with the inner wall of the sampling shovel. Its shortcomings are:

First, the stopper is hinged to the inner wall of the sampling shovel. Since the sampling shovel is usually circular, the free end of the stopper that can be turned over is located at the diameter of the circular sampling shovel. Affected by the limiting effect of the arc-shaped side wall, the stopper actually The slice cannot be turned over to the inside of the sampling shovel;

Secondly, even if the sampling shovel is designed to have a rectangular cross-section, so that the baffle can be turned inside the sampling shovel, after sampling, it will be squeezed by the soil sample between the baffles, making it difficult to reset and flip the baffle , it is difficult to realize the closure of the flap, and prevent the soil sample in the sampler from falling under the action of gravity, so as to completely preserve the function of the soil sample;

Again, the soil samples between the baffles can be dropped by gravity through shaking, so as to avoid hindering the resetting and flipping of the baffles. A certain amount of sampled soil samples will also be lost in the above process, thus affecting the accuracy of the analysis results. Moreover, the amount of samples lost each time is not the same, which introduces a large error factor to the soil sampling and analysis work.

Contents of the invention

The present invention aims at the deficiencies of the prior art, and provides a cohesive soil sampling device, which can conveniently close the bottom of the sampling cylinder after reaching the predetermined sampling depth, and will not lose the sampling volume during the process of closing the bottom of the sampling cylinder , so as to improve the accuracy of soil sampling analysis and meet the actual use requirements.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A non-cohesive soil sampling device, comprising: a cylindrical sampling cylinder, the sampling cylinder includes a sampling top and a sampling bottom that are screwed to each other, the sampling bottom is provided with a fixed baffle and a movable baffle, the The fixed baffle is fixedly arranged on the inner wall of the sampling bottom, the movable baffle is connected to the fixed baffle through a central rotating shaft, and the movable baffle is located below the fixed baffle, and the central rotating shaft is connected to the fixed baffle. The sampling cylinder is coaxially arranged, and the top surface of the movable block is composed of two fan-shaped plates symmetrical to the central rotating shaft. The radians of the two fan-shaped plates are both 90°, and the structure of the fixed block is It is the same as the top surface of the movable blocking piece, and both the top surface of the movable blocking piece and the fixed blocking piece are perpendicular to the central rotation axis.

As an improvement of the above technical solution, the top surface of the movable blocking plate is also provided with a limiting protrusion, the limiting protrusion is located at the radial edge of the moving blocking plate, and the height of the top of the limiting protrusion is greater than The height of the bottom of the fixed bracket.

As an improvement of the above technical solution, the bottom of the movable block is provided with two tapered legs symmetrical to the central axis of rotation, and each of the sector plates is provided with one tapered leg at the bottom.

As an improvement of the above technical solution, the sampling top is provided with a sampling support rod, the sampling support rod is arranged coaxially with the cylinder, and the lower end of the sampling support rod is connected to the sampling top, and the sampling support The upper end of the rod is provided with a pressurized handle.

As an improvement of the above technical solution, the upper end of the sampling support rod is also provided with an oblate washer for hammering, and the oblate washer is located above the pressure handle.

As an improvement of the above technical solution, a sampling indicating flap perpendicular to the axial direction of the cylindrical shape is provided inside the cylinder, a limiting guide post is arranged above the sampling indicating flap, and a sampling top is provided with Cooperate with the limit guide sleeve of the limit guide post, the upper end of the limit guide post passes through the limit guide sleeve and extends to the outside of the cylinder, and the surface of the limit guide post is provided with Sampling scale.

As an improvement of the above technical solution, the sampling cylinder also includes a sampling middle part arranged between the sampling top and the sampling bottom, and the sampling middle part is one or more, the sampling top, the sampling middle part It is connected with the bottom of the sample by thread.

The present invention compares with prior art, and implementation effect of the present invention is as follows:

The non-cohesive soil sampling device of the present invention can conveniently close the bottom of the sampling cylinder after reaching the predetermined sampling depth, without losing the sampling volume during the process of closing the bottom of the sampling cylinder, and can precisely control the sampling depth , so as to improve the accuracy of soil sample analysis work; the present invention is not only applicable to the sampling analysis of the soil layer in the subsidence area filled in the coal mine area, but also applicable to the sampling analysis of soft geographical environments such as lake sediments and wetland bottom mud.

In addition, the present invention is provided with the position-limiting protrusions to clearly indicate and restrict the rotation states of the fixed fence and the movable fence, thereby making it easier to move the fixed fence and the movable fence Rotation operation; the pointed cone-shaped legs are set so that the movable baffle can be firmly fixed in the soil layer, and when the sampling cylinder is rotated and the fixed baffle is driven, it can be ensured that the movable baffle does not rotate, so that It is used to change the rotation state of the fixed block and the movable block; the pressurization handle is set to facilitate the rotation and pressurization operation, and the oblate gasket is set to facilitate the hammering operation; the sampling indicator block is set The plate and the limit guide post are convenient for real-time observation of the sampling depth, thereby providing a reliable measurement function for sampling; the sampling top, the sampling middle and the sampling bottom are connected to each other by threads, so that the The length of the sampling cylinder needs to be adjusted.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of fixed shutter and movable shutter of the present invention;

Fig. 2 is the top view structural representation when the fixed shutter and the movable shutter of the present invention are opened for sampling;

Fig. 3 is the schematic diagram of the top view structure of the fixed shutter and the movable shutter according to the present invention after sampling and closing;

Fig. 4 is the overall structure schematic diagram of a kind of cohesive soil sampling device described in specific embodiment 1 of the present invention;

Fig. 5 is a schematic diagram of the overall structure of a cohesive soil sampling device described in Embodiment 2 of the present invention.

detailed description

The content of the present invention will be described below in conjunction with specific embodiments.

Specific embodiment 1

As shown in Fig. 1 to Fig. 4, it is a schematic structural diagram of a cohesive soil sampling device described in this embodiment.

A kind of non-cohesive soil sampling device described in this embodiment comprises: a cylindrical sampling cylinder, and the sampling cylinder comprises a sampling top 1 and a sampling bottom 2 which are screwed to each other, and the sampling bottom 2 is provided with a fixed Block 4 and movable block 3, the fixed block 4 is fixedly arranged on the inner wall of the sampling bottom 2, the movable block 3 is connected to the fixed block 4 through the central rotating shaft 5, and the movable block The sheet 3 is located below the fixed blocking sheet 4, the central rotating shaft 5 is coaxially arranged with the sampling cylinder, and the top surface of the movable blocking sheet 3 is composed of two fan-shaped plates 31 symmetrical to the central rotating shaft 5 , the radians of the two fan-shaped plates 31 are 90°, the structure of the fixed block 4 is the same as the top surface of the movable block 3, and the top surface of the movable block 3 and the fixed block The sheets 4 are all perpendicular to the central axis of rotation 5 .

Further, the top surface of the movable blocking plate 3 is also provided with a limiting protrusion 32, the limiting protrusion 32 is located at the radial edge 33 of the movable blocking plate 3, and the top of the limiting protrusion 32 The height is greater than the height of the bottom of the fixed block 4 . Further, the bottom of the movable block 3 is provided with two tapered feet 34 symmetrical to the central rotating shaft 5 , and the bottom of each sector plate 31 is provided with one tapered foot 34 .

Specifically, the sampling top 1 is provided with a sampling support rod 6, the sampling support rod 6 is arranged coaxially with the cylinder, and the lower end of the sampling support rod 6 is connected to the sampling top 1, and the sampling support rod 6 is connected to the sampling top 1. The upper end of the support rod 6 is provided with a pressure handle 61 . Specifically, the upper end of the sampling support rod 6 is also provided with an oblate washer 62 for hammering, and the oblate washer 62 is located above the pressure handle 61 .

As a further improvement, the inside of the cylinder is provided with a sampling indicator flap 7 perpendicular to the axial direction of the cylinder, a limit guide post 71 is arranged above the sampling indicator flap 7, and the sampling top 1 is provided with There is a limit guide sleeve 11 matching the limit guide post 71, the upper end of the limit guide post 71 extends through the limit guide sleeve 11 to the outside of the cylinder, and the limit guide post The surface of 71 is provided with sampling scales. Specifically, the sampling cylinder also includes a sampling middle part 8 arranged between the sampling top 1 and the sampling bottom 2, and there are two sampling middle parts 8, the sampling top 1, the sampling middle part 8 It is connected with the sampling bottom 2 through threads.

Specific embodiment 2

As shown in FIG. 5 , it is a schematic structural diagram of a cohesionless soil sampling device described in this embodiment.

The non-cohesive soil sampling device described in this embodiment has one central sampling part 8, and the rest of the structure is the same as that in Embodiment 1.

When sampling, first rotate the movable flap 3 so that the fixed flap 4 and the movable flap 3 are in the state shown in FIG. The pressurized handle 61 makes the sampling cylinder go deep into the sampling depth, and at the same time, the soil layer sample that enters the sampling cylinder lifts the sampling indicator baffle 7, and moves the limit guide column 71 upward to analyze and sample. Personnel can observe the sampling depth in real time according to the scale on the surface of the limit guide post 71, stop pressing down the sampling cylinder after reaching a predetermined depth, and rotate the sampling cylinder so that the fixed stopper 4 and the movable stopper 3 is in the state shown in Figure 3, and then pull up the sampling cylinder to complete the sampling.

The above content is a detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (7)

1. A non-cohesive soil sampling device, characterized in that it includes: a cylindrical sampling cylinder, the sampling cylinder includes a sampling top (1) and a sampling bottom (2) that are screwed to each other, the sampling The bottom (2) is provided with a fixed flap (4) and a movable flap (3), the fixed flap (4) is fixed on the inner wall of the sampling bottom (2), and the movable flap (3) The fixed block (4) is connected by a central shaft (5), and the movable block (3) is located below the fixed block (4), and the central shaft (5) is the same as the sampling cylinder Shaft setting, the top surface of the movable block (3) is composed of two fan-shaped plates (31) symmetrical to the central rotating shaft (5), the arcs of the two fan-shaped plates (31) are both 90°, The structure of the fixed flap (4) is the same as the top surface of the movable flap (3), and the top surface of the movable flap (3) and the fixed flap (4) are both perpendicular to the Center shaft (5). 2. A non-cohesive soil sampling device according to claim 1, characterized in that, the top surface of the movable block (3) is also provided with a limit protrusion (32), and the limit protrusion (32 ) is located at the radial edge (33) of the movable blocking piece (3), and the top height of the limiting protrusion (32) is greater than the bottom height of the fixed blocking piece (4). 3. A non-cohesive soil sampling device according to claim 1, characterized in that, the bottom of the movable block (3) is provided with two tapered legs ( 34), and the bottom of each fan-shaped plate (31) is provided with a pointed cone-shaped leg (34). 4. A non-cohesive soil sampling device according to claim 1, characterized in that, the sampling top (1) is provided with a sampling support rod (6), and the sampling support rod (6) is connected to the cylinder The shape is arranged coaxially, and the lower end of the sampling support rod (6) is connected to the sampling top (1), and the upper end of the sampling support rod (6) is provided with a pressure handle (61). 5. A non-cohesive soil sampling device according to claim 4, characterized in that, the upper end of the sampling support rod (6) is also provided with an oblate washer (62) for hammering, the oblate gasket (62) A round washer (62) is located above said pressurized handle (61). 6. A non-cohesive soil sampling device according to claim 1, characterized in that, a sampling indicator block (7) perpendicular to the axial direction of the cylinder is arranged inside the cylinder, and the sampling A limit guide post (71) is set above the indicating block (7), and the sampling top (1) is provided with a limit guide sleeve (11) matching the limit guide post (71), and the limit guide The upper end of the post (71) extends through the limit guide sleeve (11) to the outside of the cylinder, and the surface of the limit guide post (71) is provided with a sampling scale. 7. A non-cohesive soil sampling device according to claim 1, characterized in that, the sampling cylinder further comprises a sampling middle part ( 8), and the sampling middle part (8) is one or more, and the sampling top (1), the sampling middle part (8) and the sampling bottom (2) are connected to each other by threads.