A device for tidal flat biological sediment original sampling and vertical layering

Abstract

The invention is a tidal flat biological sediment undisturbed sampling and vertical layering device, belonging to the field of sediment sampling devices, comprising a ground drill and a sampling assembly; the ground drill comprises a handheld part and a drill bit part, the drill bit part being rotationally connected to the handheld part; the sampling assembly comprises an inner cylinder without a bottom wall at the lower end; a connecting pipe is fixed to the circumferential outer wall of the inner cylinder and is fixedly connected to the handheld part; a rotating rod is rotationally connected in the connecting pipe; a plurality of connecting sleeves are arranged along the axis of the rotating rod, the connecting sleeves being detachably connected to the rotating rod, and a blade is fixedly connected to each connecting sleeve; a plurality of second slits are arranged on the circumferential outer wall of the inner cylinder along the axial direction, the blades being rotationally arranged along the axis of the rotating rod and being inserted into the corresponding second slits; an outer cylinder is sleeved on the inner cylinder, a liquid nitrogen cavity is formed in the outer cylinder, a liquid injection port is formed in the outer cylinder and is in communication with the liquid nitrogen cavity, and a screw plug is threadedly connected to the liquid injection port. The device can undisturbedly sample biological sediment and layer the sampled sediment. Moreover, the device can be stored at low temperature during transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sediment sampling device, in particular to a tidal flat biological sediment undisturbed sampling and vertical layering device. BACKGROUND

[0002] Biological sediment refers to the sediment formed by the close combination of the high molecular weight extracellular polymers secreted by the microbial community in the tidal flat and the sediment particles. The characteristics of the tidal flat sediment is a basic research problem in multiple disciplines such as dynamic geomorphology and ecological environment. And a suitable tidal flat biological sediment undisturbed sampling and vertical layering device is the basis for understanding the characteristics of the tidal flat sediment.

[0003] The above-mentioned biological sediment is quite different from the traditional sediment, which is mainly reflected in the following two aspects: 1. The microbial properties of the biological sediment are more fragile than those of the traditional sediment. After sampling, if the microorganisms in the biological sediment cannot be preserved at low temperature in time, the microbial properties will change greatly. 2. The biological distribution characteristics of the biological sediment are different from those of the traditional sediment. The microorganisms in the biological sediment are obviously distributed in layers, and most of the microorganisms are only distributed in the surface of the biological sediment within a depth of several centimeters. The properties of the biological sediment change obviously with the depth of the sediment. The microorganisms in the traditional sediment are evenly distributed without obvious layer structure. Therefore, when sampling the traditional sediment, it is not necessary to keep the traditional sediment undisturbed, and the distribution of the microorganisms in different depths is not different. When sampling the biological sediment, it is necessary to keep the biological sediment undisturbed, and the layer distribution of the microorganisms in the biological sediment cannot be destroyed.

[0004] The existing sampling device is only suitable for sampling the traditional sediment and has no requirement for the preservation and distribution characteristics of the biological sediment. In view of the above-mentioned differences, the traditional sampling device cannot be used for sampling the biological sediment, and therefore a special sampling device needs to be designed for sampling the biological sediment. SUMMARY

[0005] In order to overcome the deficiencies in the prior art, the present application provides a tidal flat biological sediment undisturbed sampling and vertical layering device, which is used to solve the technical problem of how to realize the undisturbed sampling and vertical layering of the biological sediment and ensure the biological properties of the biological sediment.

[0006] In order to achieve the above-mentioned purpose, the present application provides a tidal flat biological sediment undisturbed sampling and vertical layering device, which comprises a ground drill and a sampling assembly; the ground drill comprises a hand-held part and a drill bit part, and the drill bit part is rotationally connected to the hand-held part;

[0007] The sampling assembly comprises an inner cylinder, which is in the shape of a cylindrical tube and has no bottom wall at the lower end. A connecting pipe is fixed to the outer circumferential wall of the inner cylinder, and the connecting pipe is fixedly connected to the hand-held part;

[0008] A rotating connecting rod is rotatably connected in the connecting pipe; a plurality of connecting sleeves are arranged along the axis of the rotating connecting rod, each connecting sleeve is sleeved on the rotating connecting rod, the connecting sleeve is detachably connected with the rotating connecting rod, and each connecting sleeve is fixedly connected with a blade;

[0009] A plurality of second slits are arranged on the circumferential outer wall of the inner cylinder along the axial direction, the second slits are arranged in one-to-one correspondence with the blades, and each second slit is at the same height as the corresponding blade as viewed in the axial direction of the inner cylinder; the blades rotate about the axis of the rotating connecting rod and are inserted into the corresponding second slits;

[0010] The outer cylinder is sleeved on the inner cylinder, the liquid nitrogen cavity is formed in the outer cylinder, the liquid injection port is formed in the outer cylinder and communicates with the liquid nitrogen cavity, the screw plug is threadedly connected to the liquid injection port, and the liquid nitrogen cavity is provided with liquid nitrogen for cooling the inner cylinder.

[0011] Further, the connecting sleeve is provided with a limiting screw, the limiting screw is threadedly connected with the connecting sleeve, the end of the limiting screw is in contact with the circumferential outer wall of the rotating connecting rod, and the long hole is formed in the connecting pipe for sleeving the connecting sleeve and the blade on the rotating connecting rod.

[0012] The connecting sleeve and the blade are detachably connected with the rotating connecting rod as a whole through the limiting screw, so that the blade can be conveniently replaced and installed on site.

[0013] Further, the outer cylinder is provided with a heating resistor for heating the inner cylinder, the heating resistor is attached to the circumferential outer wall of the inner cylinder, and the outer cylinder is provided with a battery for supplying power to the heating resistor.

[0014] Since the liquid nitrogen is used to cool and preserve the biological mud and sand, there is frost on the inner wall of the inner cylinder when it is delivered to the laboratory, and the inner cylinder is heated by the heating resistor, which can not only achieve the purpose of defrosting but also make the environment in the inner cylinder close to the temperature of the mud and sand when sampling.

[0015] Further, the outer cylinder and the inner cylinder are provided with buckles that cooperate with each other, and the outer cylinder is detachably connected and mounted on the inner cylinder by means of the buckles.

[0016] When the inner cylinder is sampling, the outer cylinder is not mounted on the inner cylinder, and the outer cylinder does not increase the resistance of the inner cylinder sampling. Only when the inner cylinder is cooled or heated, the outer cylinder is sleeved on the inner cylinder, and the connection between the inner cylinder and the outer cylinder is kept firm by the buckles, so that the use is more flexible.

[0017] Further, the upper end surface wall of the inner cylinder is provided with a transparent glass for the sampling personnel to observe the mud and sand in the inner cylinder.

[0018] Since the mud and sand enters the inner cylinder from the lower end of the inner cylinder, the mud and sand finally reaches the upper end of the inner cylinder, and the position of the mud and sand in the inner cylinder can be directly observed through the transparent glass at the upper end to determine whether the mud and sand has reached the uppermost end of the inner cylinder.

[0019] Further, the outer side of the connecting pipe is fixed with a cutter barrel, the cutter barrel is provided with a plurality of third slits for placing the cutter blades along the axial direction of the inner barrel, the third slits are arranged one-to-one with the cutter blades, and each third slit is at the same height with the cutter blade in the axial direction of the inner barrel.

[0020] The position for placing the cutter blade is arranged, so as to protect the sampling personnel from being scratched by the cutter blade, and also to protect the cutter blade from being bent when the cutter blade is not used. Beneficial effects

[0021] During sampling, the drill cutter part is inserted into the biological mud and sand by rotating, the inner barrel is vertically moved with the hand-held part, the mud and sand are inserted into the inner barrel in the original state, and the biological distribution in the inner barrel is not damaged.

[0022] The liquid nitrogen cavity is arranged, liquid nitrogen is injected into the liquid nitrogen cavity, the microorganism in the inner barrel is cooled, and the biological characteristics are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the whole device;

[0024] Figure 2 is a top view of the device;

[0025] Figure 3 is a structural schematic diagram of the inner barrel, the connecting pipe and the cutter barrel;

[0026] Figure 4 is Figure 3 is a structural schematic diagram of the device in which the cutter barrel is hidden;

[0027] Figure 5 is a structural schematic diagram of the outer barrel.

[0028] Fig. 1, the inner barrel; 2, the hand-held part; 3, the drill cutter part; 4, the connecting pipe; 41, the vertical section pipe; 42, the horizontal section pipe; 5, the rotating rod; 6, the connecting sleeve; 7, the limiting screw; 8, the circular cutter blade; 9, the first slit; 10, the second slit; 11, the long hole; 12, the cutter barrel; 13, the third slit; 14, the outer barrel; 15, the buckle; 16, the liquid nitrogen cavity; 17, the liquid injection port; 18, the screw plug; 19, the heating resistance; EMBODIMENT

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0030] A device for undisturbed sampling and vertical stratification of tidal flat biological sediment, comprising a sampling component and a ground drill.

[0031] See Figure 1 and Figure 2 The sampling assembly includes an inner cylinder 1, which is cylindrical in shape, with no bottom wall at the lower end and a bottom wall at the upper end. The axis of the inner cylinder 1 is set along the vertical direction, consistent with the length direction of the drilling rig. A connecting pipe 4 is fixed to the outer circumference of the inner cylinder 1. The connecting pipe 4 is in the shape of an inverted "L" and includes a vertical section pipe 41 and a horizontal section pipe 42 that are fixedly connected. The axis of the vertical section pipe 41 is parallel to the axis of the inner cylinder 1, and the vertical section pipe 41 is fixed to the outer circumference of the inner cylinder 1 by welding or other means.

[0032] See Figure 1 The drill bit includes a handheld part 2 and a drill bit part 3. When in use, the handheld part 2 does not rotate, while the drill bit part 3 rotates relative to the handheld part 2, with the axis of rotation along the vertical direction. The horizontal section tube 42 is fixedly connected to the handheld part 2.

[0033] A rotating rod 5 is provided on the vertical section pipe 41. The axis of the rotating rod 5 coincides with the axis of the horizontal section pipe 42. The vertical section pipe 41 is sleeved on the rotating rod 5, and the rotating rod 5 is rotatably mounted on the vertical section pipe 41. Specifically, only the upper end of the rotating rod 5 is rotatably connected to the vertical section pipe 41 through a bearing.

[0034] See Figure 3 and Figure 4 A plurality of connecting sleeves 6 are fitted onto the rotating rod 5. Each connecting sleeve 6 has at least one limiting screw 7 threaded onto its outer circumferential wall. The axis of the limiting screw 7 is arranged along the radial direction of the rotating rod 5, and the limiting screw 7 passes through the outer circumferential wall of the connecting sleeve 6, with its end abutting against the outer circumferential wall of the rotating rod 5. The connecting sleeve 6 and the rotating rod 5 are fixed together by the frictional force generated between the limiting screw 7 and the rotating rod 5.

[0035] A plurality of connecting sleeves 6 are arranged along the axis of the rotating rod 5. A circular blade 8 is fixed to the outer wall of each connecting sleeve 6, and a plurality of circular blades 8 are arranged along the axis of the rotating rod 5. The circular blade 8 extends radially from the vertical section pipe 41, and the surface of the circular blade 8 is perpendicular to the axis of the rotating rod 5. The circular blade 8, the connecting sleeve 6 and the rotating rod 5 rotate as a whole along the axis of the rotating rod 5. The outer wall of the vertical section pipe 41 is provided with a first gap 9 for the rotation of the circular blade 8. Each first gap 9 is at the same height as the corresponding circular blade 8, and the first gaps 9 are arranged along the axis of the vertical section pipe 41. Furthermore, a plurality of second gaps 10 are provided in the wall of the inner cylinder 1, each second gap 10 being at the same height as the corresponding first gap 9. The circular blade 8 can be inserted into the second gap 10 by rotating along the axis of the rotating rod 5. The width of the second gap 10 along the axis of the inner cylinder is between 2-5mm. If the width is greater than this range, the inner cylinder is prone to soil leakage, affecting the undisturbed sampling effect. If the width is less than this range, the circular blade 8 is not easy to insert into the second gap 10.

[0036] The connecting sleeve 6 and the circular blade 8 can be detached as a whole from the rotating rod 5. Only need to unscrew the limiting screw 7 from the connecting sleeve 6, so that the limiting screw 7 no longer interferes with the rotating rod 5, so that the connecting sleeve 6 and the rotating rod 5 are loosened relative to each other. The connecting sleeve 6 and the circular blade 8 are slid along the axis of the rotating rod 5, and the connecting sleeve 6 and the circular blade 8 are slid from the lower end of the rotating rod 5, realizing the disassembly of the connecting sleeve 6 and the circular blade 8 as a whole. The outer wall of the vertical section pipe 41 is provided with a long hole 11 for the circular blade 8 to slide along the axis of the rotating rod 5. The design intention is to facilitate the replacement of the circular blade 8.

[0037] See Figure 3 and Figure 4 The outer wall of the vertical section pipe 41 is detachably connected to the cutter cylinder 12 by bolts or other means. The cutter cylinder 12 is cylindrical in shape, and its axis is parallel to the axis of the inner cylinder 1. The outer wall of the cutter cylinder 12 is provided with a third gap 13 for placing the circular blade 8. A plurality of third gaps 13 are arranged along the axis of the cutter cylinder 12, and each third gap 13 is at the same height as the corresponding circular blade 8.

[0038] See Figure 2 The outer cylinder 14 is sleeved on the inner cylinder 1. The outer cylinder 14 is tubular, and the two ends in the axial direction do not have a bottom wall. The axes of the inner cylinder 1 and the outer cylinder 14 coincide. In this embodiment, the inner cylinder 1 and the outer cylinder 14 are equal in length, but they can also be unequal in length in other embodiments. The outer wall of the outer cylinder 14 is provided with a strip-shaped hole. In order to avoid the position of the connecting pipe 4, the length direction of the strip-shaped hole is consistent with the axis direction of the outer cylinder 14, and the two ends of the strip-shaped hole extend to the two ends of the outer cylinder 14.

[0039] The upper surface wall of the outer cylinder 14 and the upper surface wall of the inner cylinder 1 are provided with buckles 15 that cooperate with each other. The outer cylinder 14 and the inner cylinder 1 are fixedly connected to each other by the buckles 15.

[0040] See Figure 1 and Figure 2 The outer cylinder 14 is provided with a liquid nitrogen cavity 16 in the cylinder wall, and the liquid nitrogen cavity 16 is wrapped outside the inner cylinder 1 along the circumferential direction of the inner cylinder 1 from the axis direction of the outer cylinder 14. The top of the liquid nitrogen cavity 16 is provided with a plurality of liquid injection ports 17, and the plurality of liquid injection ports 17 are in communication with the liquid nitrogen cavity 16 at the same time. Each liquid injection port 17 is threadedly connected with a plug 18, and the plug 18 is used to plug the liquid injection port 17.

[0041] See Figure 5 The inner wall of the outer cylinder 14 is provided with a heating resistor 19, and the heating resistor 19 is attached to the outer wall of the inner cylinder 1. The outer cylinder 14 is provided with a battery (not shown) for supplying power to the heating resistor 19 to generate heat.

[0042] The use process of the device is as follows:

[0043] During assembly, the connecting sleeve 6 and the circular blade 8 are sleeved on the rotating rod 5 as a whole. Specifically, the connecting sleeve 6 and the circular blade 8 are slid upward along the long hole 11 from the lower end of the rotating rod 5, and are sleeved on the rotating rod 5 along the axis of the rotating rod 5. The circular blades 8 are installed in sequence from the top to the bottom. The height of each circular blade 8 is adjusted to the same height as the corresponding first gap 9. Holes are drilled in each connecting sleeve 6, and limiting screws 7 are screwed into the holes. The end of the limiting screw 7 is in contact with the rotating rod 5, and the limiting screw 7 is used to install the connecting sleeve 6 and the circular blade 8 on the rotating rod 5 as a whole.

[0044] During use, the drill bit part 3 of the ground drill rotates and spirally penetrates vertically into the sand to a certain depth, and the handheld part 2 also descends in height as a whole. Since the inner cylinder 1 is fixed with the handheld part 2, the inner cylinder 1 also moves and penetrates into the sand to a certain depth. The sand is extruded, and since the lower end of the inner cylinder 1 has no bottom wall, the sand enters the inner cylinder 1 until the sand fills the entire inner cylinder 1. The top wall of the inner cylinder 1 is provided with a transparent glass for the sampler to observe the amount of sand in the inner cylinder 1 to ensure that the sand completely fills the inner cylinder 1. Moreover, the sand maintains the layered structure before sampling and enters the inner cylinder 1, that is, the purpose of undisturbed sampling is achieved.

[0045] During layering, the sampler rotates the top end of the rotating rod 5 to achieve the purpose that each circular blade 8 in the cutter cylinder 12 rotates around the axis of the rotating rod 5, and each circular blade 8 penetrates into the corresponding second gap 10 of the inner cylinder 1. After all the circular blades 8 are inserted into the second gap 10, since the heights of the circular blades 8 are different, the circular blades 8 separate the sand in the inner cylinder 1 into layers according to the height, that is, the purpose of vertical layering is achieved. The sand in each layer is no longer in communication with each other, and the layered sand is transported to the laboratory for observation of the distribution and breeding of microorganisms in each layer of sand to prepare for subsequent experiments.

[0046] When transporting, the outer cylinder 14 is sleeved on the inner cylinder 1, the inner wall of the outer cylinder 14 is in contact with the outer wall of the inner cylinder 1, and the heating resistor 19 is attached to the outer wall of the inner cylinder 1, at this time the heating resistor 19 does not work. Unscrew the screw plug 18 on the liquid injection port 17, inject a small amount of liquid nitrogen into the liquid nitrogen cavity 16 through the needle cylinder, and then screw the screw plug 18 to close the liquid injection port 17. The low temperature of the liquid nitrogen can ensure that the biological characteristics of the silt will not be destroyed by high temperature during transportation to the experiment.

[0047] Before the experiment, the liquid nitrogen in the liquid nitrogen cavity 16 is extracted by the needle cylinder, the heating resistor is powered by the battery to generate heat, the heat generated by the heating resistor warms up and dissolves the frost condensed on the inner wall of the inner cylinder 1, and also makes the microorganisms in each layer of silt reach the environmental temperature at the time of sampling.

[0048] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A device for undisturbed sampling and vertical layering of tidal flat biogenic sediments, characterized in that, The utility model provides a kind of earth drill and sampling assembly, and the utility model relates to the technical field of earth drill. The earth drill includes a hand-held portion and a drill bit portion, and the drill bit portion is rotatably connected to the hand-held portion. The sampling assembly includes an inner cylinder, which is cylindrical and has no bottom wall at its lower end. A connecting tube is fixed to the outer circumferential wall of the inner cylinder and is fixedly connected to the hand-held portion. A rotating rod is rotatably connected in the connecting tube. A plurality of connecting sleeves are arranged along the axis of the rotating rod, each connecting sleeve is sleeved on the rotating rod, and the connecting sleeve is detachably connected to the rotating rod.

2. The device according to claim 1, wherein, Each connecting sleeve is fixedly connected to a blade.

3. The device according to claim 1, wherein, A plurality of second slits are arranged on the outer circumferential wall of the inner cylinder along the axial direction, and each second slit is correspondingly arranged with a blade.

4. The device according to claim 1, wherein, From the axial direction of the inner cylinder, each second slit is at the same height as the corresponding blade.

5. The device according to claim 1, wherein, The blade rotates around the axis of the rotating rod and is inserted into the corresponding second slit.

6. The device according to claim 1, wherein, An outer cylinder is sleeved on the inner cylinder, a liquid nitrogen cavity is formed in the outer cylinder, a liquid injection port is formed in the outer cylinder and is in communication with the liquid nitrogen cavity, a screw plug is threadedly connected to the liquid injection port, and liquid nitrogen is arranged in the liquid nitrogen cavity for cooling the inner cylinder. A limiting screw is arranged on the connecting sleeve, the limiting screw is threadedly connected to the connecting sleeve, the end of the limiting screw is in contact with the outer circumferential wall of the rotating rod, and a long hole is formed in the connecting tube for sleeving the connecting sleeve and the blade on the rotating rod. A heating resistor is arranged on the outer cylinder for heating the inner cylinder, the heating resistor is in contact with the outer circumferential wall of the inner cylinder, and a battery is arranged on the outer cylinder for supplying power to the heating resistor. The outer cylinder is detachably connected to the inner cylinder by the buckle. A transparent glass is arranged on the upper end surface of the inner cylinder for observing the internal silt of the inner cylinder. A blade cylinder is fixed to the outer side of the connecting tube, a plurality of third slits are formed in the blade cylinder along the axial direction of the inner cylinder for placing the blades, and each third slit is correspondingly arranged with a blade.

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