CN210037269U

CN210037269U - Undisturbed miniature columnar sediment sampler

Info

Publication number: CN210037269U
Application number: CN201920702573.7U
Authority: CN
Inventors: 兰波; 张琳枫; 陈有玲; 叶华; 周柯宏
Original assignee: Chongqing Three Gorges University
Current assignee: Chongqing Three Gorges University
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-02-07
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses a disturbance-free mini-type columnar sediment sampler, which comprises seven parts, namely a push rod (001), a movable baffle plate (005), a movable valve (006), a sampling pipe (003), a contour sleeve (004), a circular cover plate (002) and a plastic piston (007); the device is suitable for sampling in an environment with small fluidity of sediment (soil or sandy soil), effectively prevents disturbance of a sample in the sampling process and disturbance of collapse of the sediment after sampling from interfering an experimental result, discharges overlying water in the sampling process, directly obtains the sediment, and is simple in structure and convenient to operate.

Description

Undisturbed miniature columnar sediment sampler

Technical Field

The utility model relates to an environmental science sample collection technical field, concretely relates to miniature cylindric deposit collector of no disturbance.

Background

The migration and transformation of substances in sediments are always a research hotspot in the field of environmental science. Therefore, how to rapidly and undisturbed acquire columnar deposits is important for researching the material migration of the deposits.

At present, the existing sampler in the market is mainly a gravity sampler for collecting sediments in lakes or rivers, and the principle of the gravity sampler is mainly that a sampling tube is hammered into the sediments by gravity, then the upper end of the sampling tube is sealed in the lifting process, the sediments are prevented from falling off from the sampling tube by the pressure of water and the friction force in the sampling tube, and finally the sediments are lifted to the water surface. For laboratory simulation experiments, which are usually carried out in relatively small containers, the above-described sampler is therefore not at all suitable for such experiments. During the study of sediment material migration in a chamber, columnar sediment samples are typically collected destructively. And utilize instruments such as pipette to gather the column appearance, then probably disturb the vertical distribution condition of column appearance, simultaneously, along with the removal of pipette after the sample, soft deposit can fill up the space of drilling to leave over behind the column deposit sample to can cause great disturbance to the deposit, finally influenced the vertical distribution condition of material in the deposit, cause the great interference to the experiment. This is very disadvantageous for studying the vertical distribution of substances. It follows that how to prevent collapse of sediment after sampling and maintain the ordering of the columnar sediment samples is key to addressing the above.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mini column deposit collector of no disturbance is fit for sampling in the less environment of deposit (earth or sand) mobility, gathers the deposit-the column deposit sample in the two-phase system of covering water, prevents effectively that the disturbance of sample and sample back deposit collapse disturbance from causing the interference to the experimental result in the sample in-process, and simple structure, simple operation.

The utility model discloses the purpose is realized through following technical scheme:

a undisturbed mini-column sediment collector adopts a double-layer jacket structure and comprises: the sampling device comprises a push rod, a circular cover plate, a movable baffle, a movable valve, a sampling pipe, a contour sleeve and a plastic piston; the sampling pipe is characterized in that the movable baffle is arranged in the sampling pipe and is in close contact with the pipe wall, the push rod penetrates through the circular cover plate to be connected with the movable baffle in a threaded mode, the movable valve is located on the movable baffle and is fixed in a shaft connection mode, the pipe orifice at the upper end of the sampling pipe is outwards turned and hung at the upper port of the contour sleeve, the circular cover plate is buckled at the pipe orifice of the sampling pipe, and the plastic piston is arranged at the bottom of the sampling pipe.

Further, the overall diameter of the undisturbed mini-column sediment collector does not exceed 5 cm.

Furthermore, the sampling tube is made of transparent materials, and the diameter of the inner opening is smaller than 4 cm.

Furthermore, a sealing ring is arranged on the movable baffle, and the diameter of the movable baffle is the same as that of the sampling tube.

Further optimization, the movable valve is symmetrical left and right by taking the circle center of the movable baffle as a center, and a sealing ring is arranged on the valve.

Furthermore, the surface of the circular cover plate is in a hollow grid shape, the diameter of the circular cover plate is the same as that of the sampling tube, a circular hole is formed in the center of the circular cover plate, and only enough push rods penetrate through the circular hole and are tightly buckled on the upper port of the sampling tube.

Further, the outer wall of the sampling tube is in full contact with the inner wall of the contour sleeve.

Furthermore, the push rod is provided with a strip-shaped slotted hole, and a bolt and a nut are matched and fixed above the circular cover plate.

The utility model discloses following beneficial effect has:

the utility model discloses a miniature column deposit collector of no disturbance effectively reduces the disturbance of sample in the sampling process and sample back deposit collapse disturbance and causes the interference to the experimental result, upper liquid in the sample of sample discharge in-process directly gains lower floor's deposit, reduces the interference to the experimental study analysis in the result, and the size is less, simple structure, and the simple operation is applicable to laboratory sampling research.

Drawings

FIG. 1: the structure of the utility model is schematically shown.

FIG. 2: the utility model discloses well adjustable fender structure sketch map.

FIG. 3: a schematic diagram of a push rod structure; a is a long strip-shaped hole groove, and B is a bolt and nut fastener.

Detailed Description

The present invention is described in detail below with reference to the following embodiments, which are necessary to point out here and are only used for further explanation of the present invention, which should not be understood as a limitation to the scope of the present invention, and those skilled in the art can make some non-essential improvements and modifications to the present invention according to the above-mentioned contents of the present invention.

Examples

A undisturbed mini-column sediment collector adopts a double-layer jacket structure and comprises: the sampling device comprises a push rod 001, a circular cover plate 002, a movable baffle plate 005, a movable valve 006, a sampling pipe 003, a contour sleeve 004 and a plastic piston 007; the movable baffle 005 is arranged in the sampling tube 003 and is in close contact with the tube wall, the push rod 001 is connected with the movable baffle 005 in a threaded manner, the movable valve 006 is positioned on the movable baffle 005 and is connected with the movable baffle 005 through a shaft, the orifice at the upper end of the sampling tube is outwards turned and hung on the contour sleeve 004, the circular cover plate 002 is buckled at the orifice of the sampling tube 003, and the plastic piston 007 is arranged at the bottom of the sampling tube 003;

the overall diameter of the undisturbed mini-column sediment collector is 5 cm.

Sampling pipe 003 is transparent material, and its wall body has the scale, and internal orifice diameter is 4 cm.

A sealing ring is arranged on the movable baffle 005, and the diameter of the sealing ring is the same as the inner diameter of the sampling pipe 003.

The contoured sleeve 004 is a rigid plastic.

The movable valve 006 is symmetrical left and right with the center of the circle of the movable baffle 005, and a sealing ring is arranged on the valve.

Circular apron 002 is the plastic material, and the surface is the latticed for the fretwork, and open at the center has the round hole, only enough push rod 001 pass to the end opening on sampling pipe 003 is detained closely.

The outer wall of the sampling tube 003 is in full contact with the inner wall of the profile sleeve 004.

The smooth frictional force of sampling pipe 003 outer wall and profile sleeve 004 inner wall is less, and the two break away from when being favorable to the sample to accomplish and extract sampling pipe 003.

The utility model aims at collecting a columnar sediment sample in a sediment-overlying water two-phase system. During sampling, the push rod 001 is pushed above the sampling tube 003, the whole device is slowly and vertically inserted into the bottom of the container, and sediment samples and overlying water are slowly injected into the sampling tube 003. After the deposit got into sampling pipe 003 completely, promote push rod 001 downwards, when the liquid level reachd movable baffle 005 after, because the reaction of pressure, the deposit sample and go up the water can upwards push away two movable valve 006 on the movable baffle 005, and because movable valve 006 is lighter and thinner, it can upwards push open movable valve 006 to go up the water that goes up, it flows into movable baffle 005 top to open along with the valve in the sample upper and lower water, and because movable valve 006 bilateral symmetry, the atress is even when making the solution flow in, makes its velocity of flow and flow direction stable. When the movable baffle plate 005 is close to the sediment, the push rod 001 stops being pushed, the position of a slotted hole A on the push rod 001, which is exposed above the circular cover plate 002, is fastened by using a bolt and a nut B, so that the position of the push rod 001 is fixed and does not slide downwards compared with the circular cover plate 002, the sampling pipe 003 is extracted from the outline sleeve 004, the movable valve 006 is pressed downwards by the liquid gravity above the movable baffle plate 005 to be closed, the phenomenon that the overlying water flows back to generate disturbance to destroy the vertical distribution and the orderliness of the research substances in the sample is prevented, and when the sampling pipe 003 leaves the container, the bottom of the sampling pipe 003 is quickly plugged by using a plastic piston 007; after taking away sampling tube 003, owing to deposit pressure effect for profile sleeve 004 remains in the sample container and keeps motionless, prevents effectively that the deposit on every side from getting into the space that the sample caused, avoids the deposit in the container to take place the disturbance.

Claims

1. A disturbance-free miniature columnar sediment sampler is characterized in that: adopt double-deck jacket layer structure, include: the sampling device comprises a push rod (001), a movable baffle (005), a movable valve (006), a sampling pipe (003), a contour sleeve (004), a circular cover plate (002) and a plastic piston (007); during sampling pipe (003) was arranged in to adjustable fender (005), with pipe wall in close contact with, push rod (001) are connected with adjustable fender (005) screw thread mode, adjustable valve (006) are located adjustable fender (005), and are fixed with the hub connection mode, sampling pipe (003) upper end mouth of pipe turns up to hang on profile sleeve (004), circular apron (002) are detained at sampling pipe (003) mouth of pipe, sampling pipe (003) bottom is arranged in to plastic piston (007).

2. The undisturbed mini-column sediment sampler of claim 1 wherein: the overall diameter of the undisturbed mini-column sediment sampler is not more than 5 cm.

3. A disturbance-free mini-type column sediment sampler as claimed in claim 1 or 2, wherein: sampling pipe (003) are transparent material, and the pipe wall is equipped with the scale, and interior mouthful diameter is less than 4 cm.

4. A disturbance-free mini-column type sediment sampler as claimed in claim 3, wherein: the diameter of the movable baffle (005) is the same as the inner diameter of the sampling pipe (003), and the edge of the movable baffle is provided with a sealing ring.

5. The undisturbed mini-column sediment sampler of claim 4 wherein: the movable valve (006) is symmetrical left and right by taking the circle center of the movable baffle (005) as the center, and a sealing ring is arranged at the edge.

6. The undisturbed mini-column sediment sampler of claim 5 wherein: the outer wall of the sampling pipe (003) is in full contact with the inner wall of the contour sleeve (004).

7. The undisturbed mini-column sediment sampler of claim 6 wherein: the surface of the circular cover plate (002) is latticed, a round hole is formed in the center of the circular cover plate, and the circular cover plate only needs to be penetrated by the push rod (001) and is tightly buckled on the upper port of the sampling tube (003).