CN113702089A - Paddy field soil sampler - Google Patents

Abstract

A paddy field soil sampler comprises a sleeve (5), wherein the sleeve (5) comprises an outer sleeve (51) and an inner sleeve (52); the rotating sleeve (7) is arranged between the outer sleeve (51) and the inner sleeve (52), and the rotating sleeve (7) is in rotating fit with the inner sleeve (52); the sampling tube (1) is arranged in the inner sleeve (52), moves along the axial direction of the inner sleeve (52) and passes through the sampling end of the inner sleeve (52) for sampling; the closing device (8) is arranged at the sampling end of the inner sleeve (52), and the rotating sleeve (7) is in transmission connection with the closing device (8) so that the rotating sleeve (7) which rotates circumferentially relative to the inner sleeve (52) drives the closing device (8) to open or close the sampling end of the inner sleeve (52). The utility model provides a paddy field soil sampling ware can the stronger paddy field soil sample of mobile completely be gathered, guarantees soil sample's original state nature.

Description

Paddy field soil sampler

Technical Field

The invention relates to the technical field of soil sampling, in particular to a paddy field soil sampler.

Background

Soil samplers are tools for taking soil samples and are widely varied. Collecting a surface soil sample of the farm land or the wasteland, wherein a small iron shovel can be used; the general physical properties of soil, such as soil volume weight, porosity, water holding property and the like, can be researched by utilizing a cutting ring, wherein the cutting ring is a cylinder with openings at two ends, the lower opening is provided with an edge, and the height and the diameter of the cylinder are both about 5 cm. The most common sampling tool is the earth auger, which is divided into two types, manual and mechanical operation. Manually operated earth drills have many models, and the earth drill with a short handle for collecting shallow earth samples and a screw head earth drill for observing the profile characteristics in about 1 m of soil layer are provided; the screw head soil drilling is labor-saving, is particularly suitable for observing underground water level change, but has small soil sample collection amount. When a soil sample for chemical analysis or physical analysis of undisturbed soil is collected, an open-type soil drill is used. Collecting undisturbed soil sample without damaging soil structure or shape, and using sleeve type soil drill. The mechanical soil sampling drill is driven by a motor to enable a drill body to enter soil with a certain depth, then the soil column is lifted, laid flat for observation, and cut and sampled according to requirements. The earth pillar diameter can be controlled with drill bodies of different diameters, such as 5 cm, 10 cm or thicker. The mechanical drill has high efficiency, can save manpower, but is not as flexible and portable as a manual drill.

The existing soil sampler is often required to take a soil sample from a water layer or a soil sample from an environment with higher water content in the environment of water accumulation or water accumulation in a growing season and periodic flooding for a long time. Because soil water content is bigger, compares its mobility with general soil and is stronger, takes out the in-process of leaving after soil sampling draws, probably because influenced by the water body, frictional force is not enough between soil and the sample thief, easily takes place disturbance, the sample breaks away from or runs off, can't keep sediment structure original state, also is inconvenient to fall into the soil sample to influence the accuracy of research work.

In addition, the accuracy and scientificity of the research on certain physical properties of soil and related research work require to collect undisturbed soil samples, so that the development of a sampling device meeting the above requirements is a problem to be solved urgently.

Disclosure of Invention

Objects of the invention

The invention aims to provide a paddy field soil sampler, which overcomes the defect of soil separation in the sampling process, can collect undisturbed soil samples and ensures the accuracy and the scientificity of related research work.

(II) technical scheme

To solve the above problems, according to one aspect of the present invention, there is provided a paddy field soil sampler comprising: the sleeve comprises an outer sleeve and an inner sleeve; the rotating sleeve is arranged between the outer sleeve and the inner sleeve and is in rotating fit with the inner sleeve; the sampling tube is arranged in the inner sleeve, moves along the axial direction of the inner sleeve and penetrates through the sampling end of the inner sleeve to sample; the closing device is arranged at the sampling end of the inner sleeve, and the rotating sleeve is in transmission connection with the closing device so that the rotating sleeve rotating circumferentially relative to the inner sleeve drives the closing device to open or close the sampling end of the inner sleeve.

Further, the closure device comprises: a plurality of closing pieces which are rotatably connected with the inner sleeve; the linkage rods correspond to the closed sheets one by one, one end of each linkage rod is rotatably connected with the corresponding closed sheet, the other end of each linkage rod is rotatably connected with the rotating sleeve, and the rotating sleeve rotates circumferentially relative to the inner sleeve to drive the closed sheets to rotate so that the closed sheets open or close the sampling ends of the inner sleeve; the rotary joint of the linkage rod and the closed sheet is provided with a shaft-connected rotary button which is used for matching with the linkage rod to drive the closed sheet to rotate.

Further, each closure flap comprises a convex end and a concave end; the convex end is matched with the concave end of the adjacent closing piece, and the concave end is matched with the convex end of the adjacent closing piece; each closing sheet also comprises a forming end, and the two ends of the forming end are fixedly connected with the convex end and the concave end respectively.

Furthermore, the sampling end of the outer sleeve is provided with an inverted cone-shaped tube head, the sampling end of the sampling tube is provided with an inverted cone-shaped sampling tube head, and the inverted cone-shaped sampling tube head penetrates through the inverted cone-shaped tube head for sampling; the sampling end diameter of back taper tube head is greater than the sampling end diameter of back taper sampling tube head, and the sampling end diameter of back taper tube head is less than the other end diameter of back taper sampling tube head.

Further, the method also comprises the following steps: a piston and a piston pusher; the piston is installed in the sampling pipe, and with piston push rod fixed connection, piston push rod is used for driving the axial displacement of piston along the sampling pipe.

Further, an inner graduated scale is arranged on the piston push rod, and an outer graduated scale is arranged on the outer sleeve; the scale difference between the graduated scale and the outer graduated scale is the height of the inverted cone-shaped pipe head.

Furthermore, a plurality of drainage holes are formed in the side wall of the inverted cone-shaped sampling tube head.

Furthermore, a handle in a T shape is arranged on the outer wall of the top of the outer sleeve and used for moving the paddy field soil sampler; the outer wall of the top of the sampling tube is provided with a T-shaped handle which is used for moving the sampling tube to move in the inner sleeve along the axial direction of the inner sleeve.

Furthermore, a limiting clamping groove is formed in the inner wall of the top of the outer sleeve, and a limiting clamping bolt matched with the clamping groove is arranged on the rotating sleeve and used for controlling the opening and closing of the closing device and the opening and closing size of the closing device.

Further, a sliding groove is formed in the inner wall of the inner sleeve and comprises a vertical groove arranged axially, a first transverse groove arranged circumferentially and communicated with one end of the vertical groove and a second transverse groove arranged circumferentially and communicated with the other end of the vertical groove; the outer wall of the sampling pipe is provided with a clamping bolt matched with the sliding groove, and the clamping bolt can move along the sliding groove.

(III) advantageous effects

The technical scheme of the invention has the following beneficial technical effects:

the sampler provided by the invention is simple, practical, portable and easy to carry, is accurate in sampling, and can overcome the defect that the original shape of the soil structure cannot be maintained due to the fact that the paddy field soil is disturbed by the influence of water bodies and the sample is separated or lost.

The closing device of the invention plays a role of a protective plate, and avoids the problem that soil is separated due to high soil fluidity and needs to be collected again when the collecting pipe is pulled upwards after being inserted into soil to collect a sample. After the sampling is accomplished, push down the sleeve pipe, ensure that the sampling pipe just gets into interior sheathed tube through-hole, rotate rotatory sleeve again and drive the closure device closure, and then guarantee that the soil sample in the collection pipe can not drop, kept the original state nature of soil, improved work efficiency, also alleviateed user of service's burden simultaneously.

When the sampler was gathered soil, through the cooperation of the outer scale of the interior scale on the piston push rod and outer tube, ensured the accuracy of sampling depth, realized collecting the sampling to the soil of the different degree of depth.

The piston arranged in the collecting pipe can conveniently and stably push out the soil core collected in the collecting pipe, so that a complete soil sample soil core is provided for soil detection of agricultural soil general survey, obvious technical effects are achieved on accurately obtaining soil information and improving the accurate agricultural science informatization management level, and the method has a good popularization and application prospect in the agricultural soil general survey detection sampling operation.

Compared with a mechanical power drill, the sampler provided by the invention is low in cost, simple and practical, easy to carry, suitable for field sampling and applicable to the collection of other types of soil.

Drawings

FIG. 1 is a schematic side view of the beginning of sampling of a paddy field soil sampler provided by the present invention;

FIG. 2 is a schematic diagram of a side view structure of the paddy field soil sampler during sampling

FIG. 3 is a schematic view of the sampling completion structure of the paddy field soil sampler provided by the invention;

FIG. 4 is a schematic structural diagram of a sampling pipe of the paddy field soil sampler provided by the invention;

FIG. 5 is a schematic structural view of a casing of a paddy field soil sampler according to the present invention;

FIG. 6 is a schematic view of the closure assembly of the paddy field soil sampler in an open position, viewed from the bottom;

FIG. 7 is a schematic structural view of the closing device of the paddy field soil sampler viewed from the bottom of the sampling end in the working state;

FIG. 8 is a schematic top view of a closure assembly of a paddy field soil sampler according to the present invention;

FIG. 9 is a schematic top view of a closure device of a paddy field soil sampler according to the present invention in an open state;

FIG. 10 is a schematic view showing the structure of a sliding groove of a paddy field soil sampler according to the present invention.

Reference numerals:

1-a sampling tube; 2-a piston; 3-piston push rod; 4-a grip; 5-sleeving a pipe; 6-a handle; 7-rotating the sleeve; 8-a closure device; 10-a limit slot; 11-a limit stop; 12-a sliding groove; 13-a bolt; 14-inverted cone-shaped sampling tube head; 15-drainage holes; 51-outer sleeve; 52-inner cannula; 53-a through hole; 54-inverted conical tip; 81-closing piece; 82-linkage; 83-coupling a rotating knob; 91-inner graduated scale; 92-outer graduated scale; 811-bump end; 812-a concave end; 813-composition end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the drawings a schematic view of a layer structure according to an embodiment of the invention is shown. The figures are not drawn to scale and certain details may be omitted. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.

It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

In one embodiment, the invention provides a paddy field soil sampler for collecting a paddy field soil sample. Fig. 1 is a schematic side view of a sampling start structure of a paddy field soil sampler according to the present invention, and referring to fig. 1, the paddy field soil sampler includes: sampling tube 1, cannula 5 and rotating sleeve 7.

Fig. 4 is a schematic structural view of a sampling tube of a paddy field soil sampler provided by the present invention, please refer to fig. 4, the sampling tube 1 is configured as a cylindrical tube with two through ends, a handle 4 in a T shape is arranged on the top side wall of the sampling tube 1, and the sampling tube 1 is moved up and down by pushing the handle 4 during sampling; the sampling end of sampling pipe 1, the one end of inserting paddy field soil sampling promptly forms to wide back taper type sampling tube head 14 narrow down, and is equipped with drainage hole 15 on the lateral wall of back taper type sampling tube head 14 for the drainage.

Preferably, the inner diameter of the sampling tube 1 is 2.6cm to 3.2 cm.

In one embodiment, a piston 2 and a piston push rod 3 are further installed in the sampling tube 1, the piston 2 is fixedly connected with the piston push rod 3, and the piston push rod 3 is used for driving the piston 2 to move along the axial direction of the sampling tube 1.

In one embodiment, the piston rod 3 is further provided with an inner scale 91 for determining the sampling depth.

FIG. 5 is a schematic structural view of a casing of a paddy field soil sampler according to the present invention, please refer to FIG. 5.

In one embodiment, the cannula 5 comprises an outer cannula 51 and an inner cannula 52 which are concentric and have different diameters, a handle 6 in a T shape is arranged on the side wall of the top of the outer cannula 51, and the cannula 5 is moved up and down by pushing the handle 6 during sampling; the sampling end of the outer sleeve 51, i.e. the end inserted into the paddy soil for sampling, is formed into an inverted cone-shaped pipe head 54 with a wide top and a narrow bottom.

In one embodiment, the diameter of the sampling end of the inverted cone-shaped pipe head 54 is smaller than the diameter of the outer sleeve 51, and the diameter of the other end of the inverted cone-shaped pipe head 54 is the same as the diameter of the outer sleeve 51; and the sampling end diameter of the inverted cone-shaped pipe head 54 is larger than the diameter of the sampling pipe 1, so that the sampling pipe 1 passes through the inverted cone-shaped pipe head 54 to contact the soil.

Preferably, the sampling end diameter of the inverted cone-shaped tip 54 is greater than the sampling end diameter of the inverted cone-shaped sampling tip 14, and the sampling end diameter of the inverted cone-shaped tip 54 is less than the other end diameter of the inverted cone-shaped sampling tip 14, such that a portion of the inverted cone-shaped sampling tip 14 passes through the inverted cone-shaped tip 54 and another portion of the card is retained within the inverted cone-shaped tip 54.

Preferably, the diameter of the sampling end of the inverted conical tip 54 is slightly less than the diameter of the other end of the inverted conical sampling tip 14 by 1-2 mm. Such that the inverted cone-shaped sampling tip 14 may only pass through a portion of the inverted cone-shaped tip 54, and not all of it. So that the matching between the cannula 5 and the sampling tube 1 is more convenient and the operation of the person skilled in the art is facilitated.

In one embodiment, the inner sleeve 52 is penetrated at both ends to form a through hole 53, and the diameter of the sampling tube 1 is slightly smaller than the diameter of the through hole 53 by 2-3mm, so that the sampling tube 1 is disposed in the through hole 53 and moves in the axial direction of the through hole 53. After passing through the through hole 53, the sampling tube 1 passes through the inverted cone-shaped tube head 54 and enters the paddy field soil for sampling.

Preferably, the diameter of the through hole 53 is slightly larger than the diameter of the sampling end of the inverted cone-shaped tip 54 by 1 to 2 mm.

In one embodiment, a rotating sleeve 7 is arranged between the outer sleeve 51 and the inner sleeve 52, and the rotating sleeve 7 is in rotating fit with the inner sleeve 52; and both ends of the rotating sleeve 7 are flush with both ends of the inner sleeve 52.

The closing device 8 is arranged at the sampling end of the inner sleeve 52, and the rotating sleeve 7 is in transmission connection with the closing device 8, so that the rotating sleeve 7 rotating circumferentially relative to the inner sleeve 52 drives the closing device 8 to open or close the sampling end of the inner sleeve 52.

When the closing device 8 is opened, the through hole 53 is opened, and the sampling pipe 1 penetrates through the through hole 53 to enter paddy soil for sampling; after the sampling tube 1 is sampled and returns to the through hole 53, the closing device 8 is closed, and the through hole 53 is sealed, so that the sample in the sampling tube 1 cannot fall off or run off.

Fig. 6 is a schematic structural view from the bottom of a sampling end when a closing device of a paddy field soil sampler provided by the present invention is opened, fig. 7 is a schematic structural view from the bottom of the sampling end when the closing device of the paddy field soil sampler provided by the present invention is in an operating state, fig. 8 is a schematic structural view from the top when the closing device of the paddy field soil sampler provided by the present invention is closed, fig. 9 is a schematic structural view from the top when the closing device of the paddy field soil sampler provided by the present invention is opened, and please see fig. 6, fig. 7, fig. 8 and fig. 9.

In one embodiment, the closure device 8 comprises: a plurality of closing pieces 81, a plurality of linkage bars 82, and a plurality of pivoting knobs 83. The closing plates 81 are rotatably connected with the inner sleeve 52 through a shaft-connected rotating button 83, the linkage rods 82 correspond to the closing plates 81 one by one, one end of each linkage rod 82 is rotatably connected with the corresponding closing plate 81, the other end of each linkage rod is rotatably connected with the rotating sleeve 7, and the rotating sleeve 7 rotates circumferentially relative to the inner sleeve 52 to drive the closing plates 81 to rotate so that the closing plates 81 open or close the sampling end of the inner sleeve 52; the rotation connection between the linkage rod 82 and the closing plate 81 is provided with a shaft-connected rotation knob 83 for cooperating with the linkage rod 82 to drive the closing plate 81 to rotate.

Preferably, the plurality of closing pieces 81 are equally divided by a complete circle having the same diameter as that of the through hole 53. The pivot knob 83 provided between the inner sleeve 52 and the closing piece 81 is used to fix the closing piece 81 at the bisector of the edge of the through hole 53 and to enable the closing piece 81 to be rotatably connected to the inner sleeve 52. The coupling rod 82 and the closing plate 81 are connected by a pivot knob 83, which is disposed between the coupling rod 82 and the closing plate 81, and cooperates with the coupling rod 82 to drive the closing plate 81 to rotate.

Preferably, the closing device 8 is closed when the plurality of closing pieces 81 circumferentially move clockwise around the same dot; the closure device 8 opens when the plurality of closure tabs 81 move circumferentially counterclockwise around the same dot.

In one embodiment, each closure tab 81 includes a convex end 811 and a concave end 812; the convex end 811 is matched with the concave end 812 of the adjacent closing sheet 81, and the concave end 812 is matched with the convex end 811 of the adjacent closing sheet 81; each closing piece 81 further includes a component end 813 having two ends fixedly connected to the convex end 811 and the concave end 812, respectively.

Alternatively, the plurality of closing pieces 81 are formed in a petal shape or a leaf shape.

Optionally, the closing device 8 includes two closing pieces 81, the shape of the two closing pieces 81 after being overlapped is the same as that of the through hole 53, and the closing pieces 81 are opened and closed by translating left and right.

In some embodiments, a limiting clamping groove 10 is formed in the inner wall of the top of the outer sleeve 51, and a limiting clamping bolt 11 matched with the limiting clamping groove 10 is arranged on the rotating sleeve 7 and used for limiting the rotation of the rotating sleeve 7 so as to control the opening and closing of the closing device 8; meanwhile, the rotation range of the rotating sleeve 7 can be controlled and limited, and the opening and closing scale of the closing device 8 can be further controlled.

Specifically, fig. 6 and 7 respectively show the states of the rotary sleeve 7 driving the closing device 8 to be fully opened and the states of the rotary sleeve 7 when viewed from the sampling end of the sampler in the opening process, fig. 8 shows that the limit latch 11 is buckled into the limit slot 10 when the rotary sleeve 7 driving the closing device 8 to be fully closed so as to fix the rotary sleeve 7 to be not rotated any more, and fig. 9 shows the position of the limit latch 11 far away from the limit slot 10 when the rotary sleeve 7 driving the closing device 8 to be opened.

Optionally, when the rotating sleeve 7 rotates clockwise and circumferentially around the circumference of the inner sleeve 52, the closing device 8 is closed; the closure device 8 opens upon a counter-clockwise circumferential rotation of the rotating sleeve 7 around the circumference of the inner sleeve 52.

Fig. 10 is a schematic structural view of a sliding groove of a paddy field soil sampler provided by the present invention, please see fig. 10.

In some embodiments, the inner sleeve 52 is provided with a sliding groove 12 on the inner wall, and the sliding groove 12 comprises an axially arranged vertical groove, a first circumferentially arranged transverse groove communicated with one end of the vertical groove, and a second circumferentially arranged transverse groove communicated with the other end of the vertical groove; the outer wall of the sampling tube 1 is provided with a clamping bolt 13 matched with the sliding groove 12, and the clamping bolt 13 can move along the sliding groove 12.

Preferably, the slide groove 12 is formed in an i-shape.

Specifically, when the latch 13 is located in the first transverse slot of the sliding slot 12, the sampling end of the sampling tube 1 is flush with the sampling end of the inner sleeve 52; when the clamping bolt 13 is rotated from the first transverse groove of the sliding groove 12 to the vertical groove of the sliding groove 12, the sampling tube 1 can axially move in the through hole 53 of the inner sleeve 52; after sampling tube 1 removed the certain distance, in the perpendicular groove of bayonet 13 follow sliding tray 12 rotated to the second transverse groove of sliding tray 12, sampling tube 1 was fixed, and at this moment, sampling tube 1's back taper sampling tube head 14 just appeared completely.

Optionally, the height of the vertical slot of the sliding groove 12 is slightly higher than the height of the inverted cone-shaped tip 54 by 1-2mm, so that the inverted cone-shaped sampling tip 14 is just flush with the sampling end of the inner cannula 52 when sampling is completed. The sampler of this application is used for the soil that moisture is more and mobility is stronger, so when accomplishing sampling push down sleeve pipe 5, sampling pipe 1 as long as just get into interior sleeve pipe 52 inside can, need not get into too long to prevent that the paddy field soil from droing, cause the sampling incomplete.

In some embodiments, the outer sleeve 51 has an outer scale 92 on its outer wall.

Specifically, the scale difference between the outer scale 92 and the inner scale 91 is the height of the inverted conical sampling tube head 14, and the outer scale 92 and the inner scale 91 interact with each other during sampling, so that the accuracy of the sampling depth is further ensured.

Optionally, the sampling tube 1, the inner sleeve 52 and the outer sleeve 51 are made of transparent materials, so as to facilitate visual sampling by those skilled in the art.

In one embodiment, the present invention provides a paddy field soil sampler having the following operation principle:

fig. 1 is a schematic side view of a sampling start structure of a paddy field soil sampler according to the present invention, and referring to fig. 1, when the paddy field soil sampler is ready to work, a rotating sleeve 7 is rotated to drive a closing device 8, such that a plurality of closing pieces 81 are completely opened; then the bolt 13 in the first horizontal slot of the sliding slot 12 is screwed into the vertical slot of the sliding slot 12, and the sampling tube 1 can move up and down. The handle 4 is pushed to push the inverted cone-shaped sampling tube head 14 of the sampling tube 1 out of the inverted cone-shaped tube head 54 of the outer sleeve 51, at the moment, the clamping bolt 13 is just screwed into the second transverse groove of the I-shaped sliding groove 12, and the sampling tube 1 is fixed and cannot move up and down.

Fig. 2 is a schematic side view of the paddy field soil sampler during sampling, please refer to fig. 2, after the paddy field soil sampler is placed at a sampling point position by a handle 6, a piston push rod 3 is pulled towards a direction far away from the sampling point, and a required sampling depth is set according to a graduated scale 91 on the piston push rod 3; the handle 4 is pushed to insert the whole paddy field soil sampler into the soil. While the accuracy of the sampling depth is further ensured by means of a scale 92 on the outer sleeve 51.

Fig. 3 is a schematic structural diagram of the paddy field soil sampler provided by the present invention after sampling, please look at fig. 3, after completing the sampling, the sampling tube 1 is rotated, and the latch 13 located in the second horizontal slot of the sliding slot 12 is screwed into the vertical slot of the sliding slot 12, at this time, the sampling tube 1 can move up and down; the handle 6 is pushed towards the soil until the latch 13 is snapped into the first transverse groove of the sliding groove 12, and the sampling tube 1 is fixed, at which point the sampling tube 1 will just return into the inner sleeve 52.

The rotating sleeve 7 is rotated to close the closing device 8, and the through hole 53 of the inner sleeve 52 is sealed, so that the sample in the sampling tube 1 is prevented from being lost. Meanwhile, the limit clamping bolt 11 is buckled into the limit clamping groove 10, and the rotary sleeve 7 is fixed and does not rotate.

The pull handle 6 pulls the paddy field soil sampler in the direction far away from the soil, and the soil sample collection is completed. The paddy field soil sampler is overturned, the sampling tube 1 is drawn out, the piston push rod 3 is pushed slowly, the collected soil sample is pushed out of the sampling tube 1 slowly, and then the soil sample is loaded into a soil container.

The invention aims to protect a paddy field soil sampler, comprising: sampling tube 1, sleeve 5 and rotating sleeve 7; the sleeve 5 comprises an outer sleeve 51 and an inner sleeve 52; the rotating sleeve 7 is arranged between the outer sleeve 51 and the inner sleeve 52 and is in rotating fit with the inner sleeve 52; the sampling tube 1 is arranged in the inner sleeve 52, moves along the axial direction of the inner sleeve 52 and passes through the sampling end of the inner sleeve 52 for sampling; the closing device 8 is arranged at the sampling end of the inner sleeve 52, and the rotating sleeve 7 is in transmission connection with the closing device 8, so that the rotating sleeve 7 rotating circumferentially relative to the inner sleeve 52 drives the closing device 8 to open or close the sampling end of the inner sleeve 52. The sampler provided by the invention is simple, practical, portable and easy to carry, is accurate in sampling, and can overcome the defect that the original shape of the soil structure cannot be maintained due to the fact that the paddy field soil is disturbed by the influence of water bodies and the sample is separated or lost.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A paddy field soil sampler, comprising:

a cannula (5), the cannula (5) comprising an outer cannula (51) and an inner cannula (52);

the rotating sleeve (7) is arranged between the outer sleeve (51) and the inner sleeve (52), and the rotating sleeve (7) is in rotating fit with the inner sleeve (52);

the sampling tube (1) is arranged in the inner sleeve (52), moves along the axial direction of the inner sleeve (52) and samples through the sampling end of the inner sleeve (52);

the closing device (8) is arranged at the sampling end of the inner sleeve (52), the rotating sleeve (7) is in transmission connection with the closing device (8), so that the rotating sleeve (7) which rotates circumferentially relative to the inner sleeve (52) drives the closing device (8) to open or close the sampling end of the inner sleeve (52).

2. Paddy field soil sampler according to claim 1 characterized in that the closing means (8) comprise:

a plurality of closing pieces (81) rotatably connected to the inner tube (52) by a pivot knob (83);

the linkage rods (82) correspond to the closing plates (81) one by one, one end of each linkage rod (82) is rotatably connected with the corresponding closing plate (81), the other end of each linkage rod is rotatably connected with the rotating sleeve (7), and the rotating sleeve (7) circumferentially rotates relative to the inner sleeve (52) to drive the closing plates (81) to rotate so that the closing plates (81) open or close the sampling end of the inner sleeve (52);

the rotating connection position of the linkage rod (82) and the closing sheet (81) is provided with the shaft-connected rotating button (83) which is used for matching with the linkage rod (82) to drive the closing sheet (81) to rotate.

3. The paddy field soil sampler as claimed in claim 2,

each of the closure tabs (81) includes a convex end (811) and a concave end (812);

the convex end (811) is matched with the concave end (812) of the adjacent closing sheet (81), and the concave end (812) is matched with the convex end (811) of the adjacent closing sheet (81);

each closing piece (81) further comprises a composition end (813) with two ends fixedly connected with the convex end (811) and the concave end (812) respectively.

4. The paddy field soil sampler as claimed in claim 1,

the sampling end of the outer sleeve (51) is provided with an inverted conical tube head (54), the sampling end of the sampling tube (1) is provided with an inverted conical sampling tube head (14), and the inverted conical sampling tube head (14) penetrates through the inverted conical tube head (54) for sampling;

the sample site diameter of back taper tube head (54) is greater than the sample site diameter of back taper sample tube head (14), just the sample site diameter of back taper tube head (54) is less than the other end diameter of back taper sample tube head (14).

5. The paddy field soil sampler of claim 4, further comprising: a piston (2) and a piston push rod (3);

piston (2) are located in sampling pipe (1), and with piston push rod (3) fixed connection, piston push rod (3) are used for driving piston (2) are followed the axial displacement of sampling pipe (1).

6. Paddy field soil sampler according to claim 5,

an inner graduated scale (91) is arranged on the piston push rod (3), and an outer graduated scale (92) is arranged on the outer sleeve (51);

the scale difference between the scale (91) and the outer scale (92) is the height of the inverted conical pipe head (54).

7. Paddy field soil sampler according to claim 4,

the side wall of the inverted cone-shaped sampling tube head (14) is provided with a plurality of drainage holes (15).

8. The paddy field soil sampler as claimed in claim 1,

a handle (6) in a T shape is arranged on the outer wall of the top of the outer sleeve (51) and used for moving the paddy field soil sampler;

the sampling tube is characterized in that a T-shaped handle (4) is arranged on the outer wall of the top of the sampling tube (1) and used for moving the sampling tube (1) in the inner sleeve (52) along the axial direction of the inner sleeve (52).

9. The paddy field soil sampler as claimed in claim 1,

the top inner wall of the outer sleeve (51) is provided with a limiting clamping groove (10), and the rotating sleeve (7) is provided with a limiting clamping bolt (11) matched with the clamping groove (10) and used for controlling the opening and closing of the closing device (8) and the opening and closing scale of the closing device (8).

10. The paddy field soil sampler as claimed in claim 1,

a sliding groove (12) is formed in the inner wall of the inner sleeve (52), and the sliding groove (12) comprises a vertical groove arranged axially, a first transverse groove arranged circumferentially and communicated with one end of the vertical groove, and a second transverse groove arranged circumferentially and communicated with the other end of the vertical groove;

be provided with on the outer wall of sampling pipe (1) with sliding tray (12) assorted snib (13), snib (13) can be followed sliding tray (12) remove.

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