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Water and soil sampling device for sand collection pond in karst area, and sampling method and process thereof

发布日期:2020-01-07 13:11 Document serial number: 19641798 Release date: 2020-01-07 13:11
Water and soil sampling device for sand collection pond in karst area, and sampling method and process thereof

The invention relates to the technical field of sampling devices, in particular to a water and soil sampling device and a sampling method for a sand pool in a karst area.



Background technique:

Runoff plot is a testing facility for quantitative research on soil and water loss in sloping fields and in small watersheds. Generally, it is composed of border areas, border areas, collecting troughs, runoff and sediment storage equipment, protection zones and drainage systems. In the karst area, due to heavy rainfall and relatively loose soil, runoff areas are set up in this area. In most cases, the sand collection tank used in the experimental facility has a large amount of soil and water. The traditional sampling method is to first stir the deposited water and soil evenly and then directly hold a wide-mouth beaker to collect the water and soil mixed sample from the sand collection tank. Obviously through this It is difficult to ensure that the mixed sample obtained by this sampling method is close to the actual water and soil ratio, which is a problem currently facing.



Technical realization elements:

The technical problem to be solved by the present invention is to provide a water and soil sampling device for a sand pool in a karst area, so as to solve the problem that it is difficult to ensure that the water and soil mixed sample in the sand pool in the runoff area is close to the actual water and soil ratio in the karst area .

To solve the above problems, the present invention provides the following technical solutions:

A water and soil sampling device for a sand pool in a karst area includes a sampling cylinder. The sampling cylinder is made of transparent material. The sampling cylinder is a hollow rod structure with two ends open. A circular cutting edge is provided at the lower bottom of the sampling cylinder and the sampling A scale mark is also provided on the outer wall of the cylinder; an operation cylinder is installed on the outer surface of the sampling cylinder; the axis of the operation cylinder is parallel to the axis of the sampling barrel, and the interior of the operation cylinder is arranged in a direction parallel to its axis There is a driving lever; the two ends of the driving lever are respectively fixed with the sealing disc and the manual switch; the sealing disc is rotatably installed near the bottom of the sampling cylinder, and its rotation direction is set along the radial direction of the sampling cylinder, and the sealing disc The area of the end surface is larger than the port area of the sampling cylinder; the manual switch is rotatably installed on the operation cylinder.

Preferably, more than one annular clamping plate is provided on the inner side of the operating cylinder along its circumferential direction; a transmission rotary rod is set through the annular clamping plate; and a limited step is provided on both sides of the transmission rotating rod near the annular clamping plate. .

Further, a seal ring is further provided between the annular clamp plate and the transmission rotating rod.

Preferably, an arc-shaped groove matching the size of the sealing disc is formed on the lower bottom of the sampling cylinder along its circumference; the sealing disc is rotatably mounted on the sampling cylinder through the arc-shaped groove.

Further, the 0 scale line of the scale mark is set at the upper edge position of the arc-shaped groove.

Further, the inner wall of the sampling cylinder is further provided with a positioning groove connected to the arc-shaped groove; a side edge position cut into the inside of the sampling cylinder on the top surface of the sealing disc is provided with a limiting block matching the positioning groove. And a buffering limit pad is also installed on the sealing plate at a position opposite to the limit block.

Further, the shape of the notch of the arc-shaped groove is tapered, and its narrow end points to the inside of the sampling cylinder; the side of the sealing disc cut into the inside of the sampling cylinder is in the shape of a blade.

Preferably, a torsion spring is further provided inside the operation cylinder; two ends of the torsion spring are respectively connected to the inner wall of the operation cylinder and the transmission rotating rod.

Preferably, an end of the operation cylinder near the bottom side of the sampling cylinder has a frustum structure.

A sampling method for a water and soil sampling device of a sand collection pond in a karst area includes the following steps:

s1. Install the device and check whether the device is intact; manipulate the manual switch to drive the sealing disc to rotate through the transmission lever, so that the bottom opening of the sampling cylinder is not closed by the sealing disc;

s2. Pretreat the water and soil mixture in the sand collection tank: 1. When the total volume of the water and soil mixture is greater than 300 l, stir the water and soil mixture and allow it to settle naturally; 2. When the total volume of the water and soil mixture When less than 200l, the soil-water mixture needs to be fully stirred until the sediment is evenly distributed; 3. When the amount of sediment in the soil-water mixture accounts for less than 5% of the total soil-water mixture, and the sediment is deposited at the bottom of the soil-water mixture When the thickness is the same, no pre-treatment is required;

s3. Keep the inside of the sampling cylinder open, and insert the lower bottom of the sampling cylinder into the soil sample at the bottom of the sand collection tank until it is close to the bottom of the sand collection tank. During this operation, it is necessary to ensure that the outer wall of the sampling barrel and sand collection The bottom of the pool is vertical, and the height of the water and soil mixture in the sand collection tank is recorded by reading the submerged position of the scale;

s4. Drive the transmission lever again through the manual switch to cut the sealing disc into the inside of the sampling cylinder horizontally, and attach the stopper on the sealing disc to the positioning groove on the sampling cylinder;

s5. Control the sealing disc no longer to rotate, take the sampling cylinder out of the sand collection tank to complete a sampling;

s6. Determine the number of samples according to the amount of samples required for the experiment, and repeat steps s3 to s5 according to the number of samples. In the subsequent sampling process, the inlet position of each sampling cylinder inserted into the sand collection tank is different, and any adjacent The two inlet positions will not interfere with each other;

s7. The samples obtained by sampling and collecting in each of the previous steps are separately stirred and evenly transferred, and the required sample amount is sequentially transferred to a container provided with a label for separate storage.

The beneficial effects of the present invention:

The present invention improves the device currently used for collecting samples in pools in areas with high soil content. First, a sampling cylinder is used as a container for soil and water mixed samples; and a manual switch can be provided on the outside of the sampling cylinder to switch the transmission lever and The sealing disc is rotated to control, so that the sealing disc can seal the bottom side of the sampling cylinder; by directly collecting vertical soil and water mixed samples, it is effective to solve the current soil and water mixed samples in the sand collection pond in the runoff community in the karst area. It is difficult to ensure that the actual water-soil ratio is close when collecting. On the other hand, the invention also has the advantages of simple operation, stable transmission, and reliable sealing effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

2 is a sectional view taken along the arrow a of FIG. 1;

FIG. 3 is an enlarged schematic view of a position where the transmission rotating rod and the annular clamping plate match in FIG. 1; FIG.

4 is a schematic diagram of a three-dimensional structure of a sealing disc in this embodiment;

DESCRIPTION OF SYMBOLS: 1. Sampling cylinder, 2. Operation cylinder, 3. Transmission lever, 4. Sealing disc. 5. Manual switch. 11. Scale mark. 12. Arc groove. 13. Positioning groove. 14. Ring. Cutting edge, 21, ring card, 22, seal ring, 31, limit step, 41, limit block, 42, buffer limit pad.

detailed description

The present invention is further described below with reference to the drawings and specific embodiments:

Example:

Referring to FIG. 1, this embodiment provides a water and soil sampling device for a sand collection pond in a karst area, which includes a sampling cylinder 1; the sampling cylinder 1 is made of a transparent material; the sampling cylinder 1 is a hollow rod structure with two ends open; An annular cutting edge 14 is provided on the lower bottom, and a scale mark 11 is also provided on the outer side wall of the sampling cylinder 1; an operating cylinder 2 is installed on the outer surface of the sampling cylinder 1; the axis of the operating cylinder 2 and the sampling barrel The axis of 1 is parallel, and a transmission rotating rod 3 is provided inside the operating cylinder 2 in a direction parallel to its axis; the two ends of the transmission rotating rod 3 are respectively fixed to the sealing disc 4 and the manual switch 5; the sealing disc 4 can rotate It is installed near the lower bottom of the sampling cylinder 1 and its rotation direction is set along the radial direction of the sampling cylinder 1. The end face area of the sealing disc 4 is larger than the port area of the sampling cylinder 1. The manual switch 5 is rotatably installed in the operation. Tube 2 on. In this embodiment, the operating cylinder 2 is surrounded by an outer side wall of the sampling cylinder 1 and an arc-shaped curved surface; the sealing disc 4 is a bottle-shaped structure with large ends and small middle ends, and the sealing disc is welded and fixed on the transmission rotating rod 3 .

There are more than one annular clamp plate 21 provided on the inner side of the operation cylinder 2 along its circumferential direction; a transmission rotating rod 3 is provided through the annular clamping plate 21; and the two sides of the transmission rotating rod 3 near the annular clamping plate 21 are provided. A finite step 31; a sealing ring 22 is further provided between the annular clamping plate 21 and the transmission rotating rod 3. In this embodiment, there are two ring card plates 21, and they are respectively disposed at positions near the two ends of the operation cylinder 2. The purpose of setting the ring card plates 21 is to provide a certain degree of support for the transmission lever 3 By using the upper limit step 31 of the transmission rotating rod 3, it is possible to prevent the sliding displacement of the transmission rotating rod 3 in the operation cylinder 2, and the outer side of the annular clamping plate 21 in this embodiment is in close contact with the inner wall of the operation cylinder 2 and further set The sealing ring 22 is used for placing soil into the middle of the operation cylinder 2 and hinders the movement of the transmission rotating rod 3.

An arc-shaped groove 12 is formed in the lower bottom of the sampling cylinder 1 along the circumferential direction to match the sealing disc 4; the sealing disc 4 is rotatably mounted on the sampling cylinder 1 through the arc-shaped groove 12. In this embodiment, the lower bottom port of the operation cylinder 2 is disposed below the arc-shaped groove 12. Considering the size structure of the sealing disc 4, the same size is also opened at the position of the side wall of the operation cylinder 2 adjacent to the arc-shaped groove 12. The arc-shaped structure notch is convenient for the sealing disc 4 to move; the cooperation of the arc-shaped groove 12 and the sealing disc 4 can move the sealing disc 4.

The zero scale line of the scale mark 11 is set at the cutting edge position of the annular cutting edge 14.

The inner wall of the sampling cylinder 1 is further provided with a positioning groove 13 connected to the arc-shaped groove 12; a side edge position cut into the inside of the sampling cylinder 1 on the upper end surface of the sealing disc 4 is provided with a fitting with the positioning groove 13 The limiting block 41 is further provided with a buffering limiting pad 42 on the sealing plate 4 at a position opposite to the limiting block 41. In order to prevent the sealing disc 12 from being actively detached from the inside of the sampling cylinder 1, a stop block 41 is provided on the sealing disc 4 to use the inner wall of the sampling cylinder 1 to block the limiting block 41. Taking into account the tightness, The positioning groove 13 is matched with the limiting block 41 so that the bottom surface of the sealing disc 4 completely closes the port of the sampling cylinder 1; and the setting of the buffer limit pad 42 can prevent the sealing disc 4 from blocking the sampling cylinder 1 during the rotation process. In addition to the collision caused by the side wall, it can also play a certain sealing effect; reduce the outflow of sediment from the arc-shaped groove 12.

The shape of the notch of the arc-shaped groove 12 is tapered, and its narrow end points to the inside of the sampling cylinder 1. Referring to FIG. 4, the side of the sealing disc 4 cut into the inside of the sampling cylinder 1 has a blade shape. The cutting edge is designed to be smoother when the sealing disc 4 is rotated into the inside of the sampling cylinder 1 through the sand in the sand collection tank.

A torsion spring is also provided inside the operation cylinder 2; two ends of the torsion spring are respectively connected to the inner wall of the operation cylinder 2 and the transmission rotating rod 3. In this embodiment, the torsion spring is not identified in the figure. When the torsion spring is in the original length state, the sealing disc 4 coincides with the port of the sampling cylinder 1.

An end of the operation cylinder 2 near the bottom side of the sampling cylinder 1 is a frustum structure. The operation cylinder 2 of the frustum structure is designed to facilitate the operation cylinder 2 to enter the mud layer in the sand collection tank more easily and quickly.

This embodiment also provides a sampling method of the sampling device, including the following steps:

s1. Install the device and check whether the device is intact; manipulate the manual switch 5 and drive the sealing disc 4 to rotate through the transmission lever 3 so that the bottom opening of the sampling cylinder 1 is not closed by the sealing disc 4;

s2. Pretreat the water and soil mixture in the sand collection tank: 1. When the total volume of the water and soil mixture is greater than 300 l, stir the water and soil mixture and allow it to settle naturally; 2. When the total volume of the water and soil mixture When less than 200l, the soil-water mixture needs to be fully stirred until the sediment is evenly distributed; 3. When the amount of sediment in the soil-water mixture accounts for less than 5% of the total soil-water mixture, and the sediment is deposited at the bottom of the soil-water mixture When the thicknesses are the same, no pre-treatment is required; considering that the sediment in the sand collection tank is highly uneven due to the large volume of the water and soil mixture, the mud is near the entrance of the sand collection tank. Sand deposition is often several times higher than the other side. When the total volume is larger than 300l, the difficulty of completely stirring the entire sand collection tank will increase a lot, so it is not necessary to ensure that the sand mixing tank is fully stirred everywhere. Make the sediment evenly distributed, and below 200l can ensure the uniformity of the sediment after stirring, but if the proportion of sediment is small, and the sedimentation pond is already settled naturally in the early stage , An upper clear water, sediment at the bottom of the sandbox set substantially uniform deposition thickness can be the case without first stir resampling, the sampling tube can be directly sampled.

s3. Keep the inside of the sampling cylinder 1 unblocked, and insert the lower bottom of the sampling cylinder 1 into the soil sample at the bottom of the sand collection tank until it is close to the bottom of the sand collection tank. During this operation, the outer wall of the sampling barrel 1 must be ensured. It is perpendicular to the bottom of the sand pool, and the height of the water and soil mixture in the sand pool is recorded by reading the submerged position of the scale;

s4. Use the manual switch 5 to drive the transmission lever 3 again to cut the sealing disc 4 into the inside of the sampling cylinder 1 laterally, and attach the limiting block 41 on the sealing disc 4 to the positioning groove 13 on the sampling cylinder 1;

s5. Control the sealing disc 4 no longer to rotate, and take the sampling cylinder out of the sand collection tank to complete a sampling;

s6. Determine the number of samples according to the amount of samples required for the experiment, and repeat steps s3 to s5 according to the number of samples. In the subsequent sampling process, the inlet position of each sampling cylinder 1 inserted into the sand collection tank is different, and any adjacent The two inlet positions of the two will not interfere with each other; in this embodiment, the distance between any two adjacent inlet positions of the sampling cylinder 1 is not less than 1.5 times the outer diameter of the sampling cylinder; Distance to ensure that the previous inlet insertion point will not affect the next inlet insertion point.

s7. The samples obtained by sampling and collecting in each of the previous steps are stirred uniformly, and the required sample amount is sequentially transferred to a container provided with a label for separate storage.

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