CN214334367U - Tidal flat sampling device - Google Patents
Tidal flat sampling device Download PDFInfo
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- CN214334367U CN214334367U CN202120351343.8U CN202120351343U CN214334367U CN 214334367 U CN214334367 U CN 214334367U CN 202120351343 U CN202120351343 U CN 202120351343U CN 214334367 U CN214334367 U CN 214334367U
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Abstract
The utility model provides a tidal flat sampling device, include: the sample tube is provided with a first end and a second end which are both in an opening structure along the axial length direction; a piston: the device is arranged in the lumen of the sample tube and is matched with the inner wall of the lumen; a piston rod: the piston rod is connected with the piston, penetrates out of the first end of the sample tube, and is provided with radial through holes at intervals along the length direction of the piston rod; the sampling device further includes a plunger dimensioned to: can pass through the through hole and can be clamped at the opening of the first end of the sample tube. The sampling device is a non-compression original state sampling, a sampling sample is convenient to fix after sampling, the operation is convenient, and the sample leakage and secondary sample suction processes of a sample at the bottom layer of the sampling tube under the negative pressure action caused by air residue at the top of the sampling tube are avoided; the sample pollution caused by cutting and sample separation of the existing sampling tube is avoided.
Description
Technical Field
The utility model relates to a marine environment monitors technical field, concretely relates to tidal flat sampling device.
Background
The tidal flat is located in the land-sea crossing zone, and the mud tidal flat is generally developed due to the periodical seawater submergence. Tidal flat deposits, under the dual influence of global changes and human activities, not only bury large amounts of blue carbon, but also receive numerous watershed contaminants. In order to accurately reconstruct the environmental evolution process and mechanism of a tidal flat, the primary task is to obtain an uncompressed undisturbed columnar sediment sample.
Referring to fig. 1, a tidal flat sampling apparatus and a sampling flow chart in the prior art are shown. The existing tidal flat columnar sediment sampling mostly uses a tube inserting method, and generally comprises a sampling tube, a handle, a rubber hammer and a sealing cover. The specific sampling method is that the sampling tube is vertically inserted into tidal flat sediment, after the sediment is penetrated into the sampling tube for a certain depth, the upper end of the sampling tube is sealed by a sealing cover, and then the sampling tube is vertically pulled out and taken back to a laboratory for cutting and analysis. The sampling tube is of a structure with an opening at one end and a closed end at the other end. When the sampling tube is inserted into the tidal bank, air is trapped in the tube.
The principle of intubation sampling is simple, the equipment is convenient and fast, and the device is widely applied to collecting tidal flat columnar sediments. However, the existing sampler has the following defects: 1) in the process of inserting the sampling pipe into the sediment, the sediment in the pipe can be compressed to different degrees under the influence of the frictional resistance between the pipe wall and the sediment; 2) in the process of upwards pulling out the sampling tube after the sediment is injected, because the top end of the sampling tube is difficult to avoid residual air, the air thickness is lengthened due to stretching under the action of negative pressure, so that sample leakage and secondary sample suction processes of a bottom sample in the sampling tube are inevitable; 3) the traditional cylindrical sample needs to be cut open by a cutting machine, and the generated pipe wall scraps are easy to pollute the sample.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a.
In order to achieve the above object, the utility model adopts the following technical scheme:
a tidal flat sampling apparatus, comprising:
the sample tube is provided with a first end and a second end which are both in an opening structure along the axial length direction;
a piston: the device is arranged in the lumen of the sample tube and is matched with the inner wall of the lumen;
a piston rod: the piston rod is connected with the piston, penetrates out of the first end of the sample tube, and is provided with radial through holes at intervals along the length direction of the piston rod; the sampling device further includes a plunger dimensioned to: can pass through the through hole and can be clamped at the opening of the first end of the sample tube.
In some embodiments of the present invention, the piston rod is provided with a handle on one side.
In some embodiments of the utility model, the sampling device further includes along the solid fixed ring that the first end side periphery of sample cell set up, is provided with the handle along solid fixed ring outer wall.
In some embodiments of the present invention, the sampling device further comprises a rubber ring, wherein the rubber ring is disposed inside the fixing ring.
The utility model discloses in some embodiments, the sample cell is bilayer structure, including sample cell outer pipe wall and sample cell interior pipe wall.
The utility model discloses in some embodiments, along sample cell axial length direction, be provided with the scale mark on the sample cell pipe wall.
The utility model discloses in some embodiments, sample cell second end opening part, pipe are the contraction structure by the direction of first end to second end.
In some embodiments of the present invention, the outer wall of the sample tube is a contraction structure from the first end to the second end.
The utility model provides a sampling yellow paper, its beneficial effect lies in:
the sampling device is a non-compression original state sampling device, a sampling sample is convenient to fix after sampling, the operation is convenient, and sample leakage and secondary sample suction processes of a sample at the bottom layer of the sampling tube under the negative pressure action caused by air residue at the top of the sampling tube are avoided; the sample pollution caused by cutting and sample separation of the existing sampling tube is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic diagram of a sampling flow of a sampler in the prior art.
Fig. 2 is a schematic diagram of the sampler of the present invention.
Fig. 3 is a schematic structural view of the fixing ring.
Fig. 4 is a schematic diagram of the sampling flow of the sampler of the present invention.
In the above figures:
101-a first end of a sample tube, 102-a second end of the sample tube, 103-an inner wall of the sample tube, 104-an outer wall of the sample tube, 105-a scale, 106-a lumen;
2-a piston;
3-piston rod, 301-through hole, 302-handle;
4-inserting a rod;
5-fixing the ring;
6-operating handle;
7-a rubber ring;
8-knob.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on," "connected to" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and are not intended to imply relative importance.
A tidal flat sampling device is used for sampling a muddy tidal flat.
Referring to fig. 1 and 2, the sampling device includes a sample tube, a piston 2, a piston rod 3, and the like.
The sample tube has an open configuration along its axial length at both the first end 101 and the second end 102. The sample tube cavity is used for placing tidal flat mud samples. The utility model discloses in some embodiments, the sample cell is bilayer structure, including inner tube wall 103 and outer tube wall 104, this kind of structure more is favorable to guaranteeing the intensity of sample cell. The length direction of the sample tube is the axial direction, and the sample tube is provided with a scale mark 105 along the axial direction, wherein the scale mark 105 can be selectively arranged on the inner wall 103 of the sample tube or the inner wall 014 of the sample tube.
In some embodiments of the present invention, the opening of the second end 102 of the sample tube is in a contracting structure from the first end 101 to the second end 102. For a sample tube with a double-layer structure, the outer wall 104 of the sample tube is in a contracted structure from the first end to the second end. During sampling, the second end 102 of the sample tube is inserted into the tidal flat, and the second end 102 is designed to be a necking structure, so that the sample tube is more beneficial to being inserted into the tidal flat.
The hardness of the visual tidal flat beach face of material of sample cell is selected, if the foot is soft, can select to use organic glass pipe, if harder, can select stainless steel pipe, improves the resistance to pressure of sampling tube at the injection sediment in-process. Further, a PVC pipe or the like may be selected.
And (3) a piston 2: is arranged in the cavity 106 of the sample tube and is tightly matched with the inner wall of the cavity 106.
A piston rod 3: the piston rod 3 is connected with the piston 2, penetrates out of the first end 101 of the sample tube and is provided with radial through holes 301 at intervals along the length direction of the piston rod 3; the sampling device further comprises a plunger 4, the plunger 4 being dimensioned to: can pass through the through hole 301, and the length of the inserted rod 4 needs to be satisfied and can be clamped at the opening of the first end 101 of the sample tube.
The effect of piston rod 3 lies in the motion of control piston 2, the utility model discloses some embodiments, piston rod 3 wears out one side and is provided with handle 302, and handle 302 is used for assisting to draw and rises piston rod 3.
The utility model discloses in some embodiments, for the convenience of sampling operation, sampling device further includes along the solid fixed ring 5 that the first end 101 side periphery of sample cell set up, is provided with handle 6 along solid fixed ring 5 outer walls. The fixing ring 5 is provided with a knob 8 which can be used for adjusting the clamping degree of the fixing ring 5.
The utility model discloses in some embodiments, in order to improve the fixity of solid fixed ring 5, increase frictional force, sampling device further includes rubber ring 7, rubber ring 7 sets up in solid fixed ring 5's inboard, is located the one side of hugging closely sample cell outer wall 104 promptly.
During sampling, the piston 2 is pushed to the limit position of the bottom (the second end 102) of the sample tube and is flush with the second port of the sample tube, so that the possibility of air retention is reduced; the lower bottom surface of the piston 3 is tightly attached to the surface of the tidal flat sediment, and air on the contact surface is squeezed out.
One person can hold the handle 301 tightly to keep the piston 3 at a fixed height position in the process of the sampling tube penetrating the sediment. The other person holds the sampling tube operating handle 6 and vertically presses down with force until the sediment fills the sampling tube or the required sampling depth.
After sampling is finished, inserting the inserted rod 4 and fixing the piston rod 3; the elevation position of the handle 301 may be fixed by means of a tripod or the like. Two persons hold the two ends of the sampling tube handle 301 respectively and lift the tube out slowly at a constant speed.
Carefully observing the integrity of the sample in the sampling tube, and if the sample is interrupted, discontinuous and the like, cleaning the sampling tube with distilled water and then repeating the sampling step.
Cleaning the outer wall of the sampling tube, recording the characteristics of each layer of the sediment and taking a picture; and moving the inserted rod 4 outwards one hole one by one, pushing the piston rod 3 to extrude deposits, and then placing the cut layer-by-layer samples in sample bags for sealed storage.
In the above process, the amount of the sample taken and the amount of the cut sample can be observed with the aid of the scale 105.
The piston 2 is added in the sampling tube to offset the frictional resistance generated in the process of penetrating the sediment into the sampling tube, so that the sample in the tube is ensured not to be compressed; meanwhile, the piston 2 is tightly contacted with the surface of the sediment to completely extrude air, so that sample leakage and secondary sample suction processes of the sediment at the bottom layer in the sampling pipe in the pulling-out process are eliminated. After the sampling is finished, the sediments are extruded layer by layer through the piston rod 3, and the sample pollution caused by the traditional cutting and sample splitting is avoided.
Referring to fig. 1 and 4, the difference between the prior sampler and the novel sampler in the process of collecting the column sample is shown; assume that the length of the sampler and the height of the exposed beach surface after the penetration of the muddy tidal beach deposits are both h and a, respectively.
1. Difference in the sampling tube penetration process: in the penetration process of the existing sampler, the height of the top surface of the sediment in the tube is reduced by b (step 12) due to the frictional resistance between the tube wall and the sediment, so that the sediment in the tube is compressed to a certain degree; the novel sampler has the advantages that the piston is in close contact with the beach surface, the suction force offsets the frictional resistance generated by the sampling tube in the process of inserting the sampling tube, and the sediment is not compressed (step 16).
2. Difference in sampling tube extraction process: because the top of the existing sampler inevitably contains part of air, during the process of upwards pulling out the sampler, the sediment is sucked out by the negative pressure brought by air stretching (step 13), compared with the air length (step 12), the air in the (step 13) is stretched by d, so that the sediment sample in the length of the deep layer d (step 12) is leaked out, during the process of completely pulling out the sampling tube, the negative pressure of the air is gradually weakened, and the bottom of the sampling tube secondarily sucks the sediment of a certain layer/layers (step 14, generally, e < d); the new sampler has no air residue, so the air stretching and sample leakage and secondary sample suction processes (step 16 → step 17 → step 18) do not exist.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A tidal flat sampling apparatus, comprising:
the sample tube is provided with a first end and a second end which are both in an opening structure along the axial length direction;
a piston: the device is arranged in the lumen of the sample tube and is matched with the inner wall of the lumen;
a piston rod: the piston rod is connected with the piston, penetrates out of the first end of the sample tube, and is provided with radial through holes at intervals along the length direction of the piston rod; the sampling device further includes a plunger dimensioned to: can pass through the through hole and can be clamped at the opening of the first end of the sample tube.
2. The tidal flat sampling device of claim 1, wherein the piston rod is provided with a handle on the side that the piston rod extends out.
3. The tidal flat sampling apparatus of claim 1, wherein: the sampling device further comprises a fixing ring arranged along the periphery of the first end side of the sample tube, and an operating handle is arranged along the outer wall of the fixing ring.
4. The tidal flat sampling device of claim 3, further comprising a rubber ring disposed inside the securing ring.
5. The tidal flat sampling apparatus of claim 1, wherein the sample tube has a double-layer structure comprising an outer sample tube wall and an inner sample tube wall.
6. The tidal flat sampling apparatus of claim 1 or 5, wherein the wall of the sample tube has graduation marks along the axial length of the sample tube.
7. The tidal flat sampling apparatus of claim 1 or claim, wherein the sample tube is open at the second end and the tube is in a contracted configuration from the first end to the second end.
8. The tidal flat sampling device of claim 7 or the sample tube outer wall is in a contracted configuration from the first end to the second end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120351343.8U CN214334367U (en) | 2021-02-08 | 2021-02-08 | Tidal flat sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120351343.8U CN214334367U (en) | 2021-02-08 | 2021-02-08 | Tidal flat sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN214334367U true CN214334367U (en) | 2021-10-01 |
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| CN202120351343.8U Active CN214334367U (en) | 2021-02-08 | 2021-02-08 | Tidal flat sampling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117686262A (en) * | 2024-02-04 | 2024-03-12 | 中国海洋大学 | Drilling device and method for tidal flat sediment acquisition |
| CN117686262B (en) * | 2024-02-04 | 2024-06-04 | 中国海洋大学 | Drilling device and method for tidal flat sediment acquisition |
-
2021
- 2021-02-08 CN CN202120351343.8U patent/CN214334367U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117686262A (en) * | 2024-02-04 | 2024-03-12 | 中国海洋大学 | Drilling device and method for tidal flat sediment acquisition |
| CN117686262B (en) * | 2024-02-04 | 2024-06-04 | 中国海洋大学 | Drilling device and method for tidal flat sediment acquisition |
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