CN107219088B - Undisturbed grassland sample sampling device - Google Patents

Undisturbed grassland sample sampling device Download PDF

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Publication number
CN107219088B
CN107219088B CN201710403343.6A CN201710403343A CN107219088B CN 107219088 B CN107219088 B CN 107219088B CN 201710403343 A CN201710403343 A CN 201710403343A CN 107219088 B CN107219088 B CN 107219088B
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rod
arc
cutter head
pull rod
fixing device
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CN107219088A (en
Inventor
孙义
侯扶江
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Lanzhou University
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Lanzhou University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/04Devices for withdrawing samples in the solid state, e.g. by cutting

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses an undisturbed grassland sample sampling device which comprises a vertically arranged supporting rod, wherein the bottom end of the supporting rod is connected with a vertical telescopic probe, the bottom end of the supporting rod is provided with a plurality of connecting arms which are vertical to the supporting rod, the free ends of the connecting arms are respectively connected with a fixing device for fixing a cutter head, the fixing device comprises a hollow arc-shaped plate and a pull rod, the arc-shaped plate is used for penetrating through the cutter head, the inner surface of the arc-shaped plate is movably connected with one end of a connecting rod, the other end of the connecting rod is fixedly connected with the connecting arm, one end of the pull rod is fixed on the arc-shaped plate, the other end of the pull rod is connected with the connecting rod, the change of angles between the connecting arm and the fixing device is realized by adjusting the length of the pull rod, and the fixing device and the cutter head have the same vertical direction and curvature in the vertical direction.

Description

Undisturbed grassland sample sampling device
Technical Field
The invention particularly relates to an undisturbed grassland sample sampling device.
Background
Soil and plant sampling are important steps in plant physiology and ecology research, and research methods for indoor condition control of undisturbed soil and vegetation are common means in research practice. At present, sampling technology based on undisturbed soil is mature, but can not meet the field sampling of the undisturbed soil-vegetation whole, and further control experiments of indoor conditions are carried out. The existing undisturbed soil technology mainly has the following defects:
1. neglecting vegetation: only the soil portion is emphasized and plants attached to their existence are disregarded. And coexistence research of the two is often the focus of research of academy of sciences.
2. The application is single:
2.1, only used for measuring physical indexes such as volume weight, and the like, the sample is difficult to carry out other more valuable utilization, so that the yield is lower;
2.2, studies in soil and vegetation response artificial environments cannot be achieved.
3. The structure is single: typically cylinders or cubes of different volumes, cannot be transformed into a variety of shapes.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for researching environment change response of an undisturbed sample in a common flowerpot by considering vegetation and soil, and has ingenious structure and convenient use.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a former state meadow sample sampling device includes the branch of vertical setting, the bottom of branch is connected with vertical scalable probe, the branch bottom be equipped with m with branch vertically linking arm, and m=2n (n is no less than 1,1 is natural number), the fixing device of fixed tool bit is connected respectively to the free end of linking arm, fixing device includes hollow arc and pull rod, be used for passing the tool bit in the arc, the one end of arc internal surface swing joint connecting rod, the connecting rod other end with linking arm links firmly, pull rod one end is fixed on the arc, and sets up the midpoint of the outer 1/3 department of stretching out tool bit one end on the arc, the pull rod other end is connected with the connecting rod, the pull rod is scalable pull rod, through adjusting the length of pull rod, realizes the change of linking arm and fixing device's angle for the tool bit on the fixing device and the splendid attire container of sample fit, fixing device has the curvature of same vertical direction and vertical direction with the tool bit.
Preferably, the connecting arm comprises a plurality of connecting units which are connected in sequence, the opposite connecting positions of two adjacent connecting units are respectively provided with a tooth-shaped structure, and the tooth-shaped structures are engaged relatively and connected through a fixing piece.
Preferably, the pull rod comprises two bolts and a double-headed screw, one end of one bolt is fixed on the arc plate, one end of the other bolt is fixed on the connecting rod, the two bolts are respectively screwed with the double-headed screw, and the length of the pull rod is changed by changing the connection depth of the bolts and the double-headed screw.
Preferably, one end of the connecting rod is movably connected with the arc plate through a bolt seat, and one end of the connecting rod is arranged at the midpoint of 1/3 of the outer edge of one end of the knife handle extending out of the arc plate.
Preferably, the number of the connecting arms is four, the angle formed by two adjacent connecting arms is 90 degrees, and the connecting arms are respectively connected with the supporting rod through connecting pieces.
Preferably, the sampling device further comprises a lifting handle, wherein the lifting handle is arranged at the top end of the supporting rod and is used for lifting and sampling.
Preferably, a buckle is arranged on the arc-shaped plate of the fixing device and is used for fixing the position of the cutter head.
The invention has the beneficial effects that:
1) The applicability is improved: easy to carry and disassemble the method is suitable for ex-situ tests;
2) Diversity of: the angle can be adjusted or the cutter head can be replaced according to the requirement to obtain undisturbed samples with different sizes and shapes, and the operation is easy;
3) Improving the follow-up test precision: the influence on the subsequent test caused by the fact that the soil cannot be tightly combined with the flowerpot due to the fact that the shape and the size are not matched with the flowerpot is removed;
4) Economic: low cost and can be used infinitely.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an undisturbed lawn sample sampling apparatus of the present invention;
FIG. 2 is a schematic view of a fixing device according to the present invention;
FIG. 3 is a schematic view of the structure of an arc plate and a cutter head in the fixing device of the invention;
FIG. 4 is a schematic view showing the split structure of the connecting arm and the fixing device in the invention;
FIG. 5 is a schematic illustration of the connection of the connecting arm to the brace in the present invention;
in the figure: the lifting handle is 1, the supporting rod is 2, the fixing device is 3, the connecting arm is 4, the tool bit is 5, the probe is 6, the pull rod is 7, the bolt is 701, the double-headed screw is 702, the movable stud is 703, the arc-shaped plate is 8, the transverse curvature is 9, the longitudinal curvature is 10, the connecting rod is 11, the fastening seat is 12, the stud is 13, the supporting frame is 15, the push-pull handle is 16, the scale is 17, the notch is 18, the cutting edge is 19, the first screw is 20, the connecting unit is 21, the rotating screw is 22, and the fastening is 23.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
The utility model provides a former state meadow sample sampling device includes the branch of vertical setting, the bottom of branch is connected with vertical scalable probe, the branch bottom be equipped with m with branch vertically linking arm, and m=2n (n is no less than 1,1 is natural number), the fixing device of fixed tool bit is connected respectively to the free end of linking arm, fixing device includes hollow arc and pull rod, be used for passing the tool bit in the arc, the one end of arc internal surface swing joint connecting rod, the connecting rod other end with linking arm links firmly, pull rod one end is fixed on the arc, and sets up the midpoint of the outer 1/3 department of stretching out tool bit one end on the arc, the pull rod other end is connected with the connecting rod, the pull rod is scalable pull rod, through adjusting the length of pull rod, realizes the change of linking arm and fixing device's angle for the tool bit on the fixing device and the splendid attire container of sample fit, fixing device has the curvature of same vertical direction and vertical direction with the tool bit.
As shown in fig. 1, the undisturbed grassland sample sampling device comprises a vertically arranged supporting rod 2, wherein a vertical telescopic probe 6 is connected to the bottom end of the supporting rod 2, a connecting arm 4 perpendicular to the supporting rod 2 is arranged at the bottom end of the supporting rod 2, and in this embodiment, the connecting arm 4 is respectively and vertically connected with the supporting rod through a connecting piece; the free ends of the connecting arms 4 are respectively connected with a fixing device 3 for fixing the tool bit 5, the fixing device 3 is matched with the tool bit 5 for use, the fixing device 3 and the tool bit 5 have the same vertical direction and the same transverse curvature 9 and the same vertical curvature 10, the proper fixing device 3 and the tool bit 5 are selected according to the difference of selected samples, the top end of the supporting rod 2 is provided with a lifting handle 1, the lifting handle 1 is connected with the supporting rod 2 through a rotary screw 22, and the lifting handle 1 is used for lifting the selected samples.
As shown in fig. 2 and 5, the fixing device 3 includes a hollow arc plate 8 and a pull rod 7, where the arc plate 8 is of a hollow structure and is used to pass through the cutter head 5, the inner surface of the arc plate 7 is movably connected with one end of a connecting rod 11, the other end of the connecting rod 11 is fixedly connected with the connecting arm 4, in this embodiment, the length direction of the connecting rod 11 is consistent with the length direction of the connecting arm 4, and the angle between the connecting rod 11 and the connecting arm 4 is 0 °. One end of the outer surface of the arc-shaped plate is provided with a supporting frame 15, one end of the connecting rod 11 is movably connected with the arc-shaped plate 8 through a bolt seat 12, a bolt 13 is inserted into the bolt seat 12, the connecting rod 11 is movably connected with the bolt 13, when the angle between the connecting rod 11 and the arc-shaped plate 8 needs to be adjusted, the connecting rod 11 needs to be rotated to a required position, and at the moment, the connecting rod 11 can be fixed at the position; the bolt seat 12 is arranged at the midpoint of 1/3 of the outer edge of one end of the knife handle extending out of the arc-shaped plate 8; one end of the pull rod 7 is fixed on the arc-shaped plate 8 and is arranged at the midpoint of 1/3 of the outer edge of one end of the cutter head extending out of the arc-shaped plate 8, the other end of the pull rod 7 is connected with the connecting rod 11, the pull rod 7 is a telescopic pull rod, the change of the angle between the connecting arm 4 and the fixing device 3 is realized by adjusting the length of the pull rod 7, as shown in fig. 2, the angle a is the angle formed by the connecting rod 11 and the arc-shaped plate 8, namely the angle formed by the connecting arm 4 and the fixing device 3, is the angle formed by the connecting arm 4 and the cutter head 5, and is the angle required by the cutter head and the sample container to be wedged, and before sampling, the angle is firstly required to be adjusted according to the shape of the required selected sample to change the angle, and the wedging of the cutter head and the sample container is ensured. The pull rod 7 in this embodiment includes two bolts 701 and one stud 702, one end of one bolt 701 is fixed on the arc plate 8, one end of the other bolt is fixed on the connecting rod 11 through the movable stud 703, the two bolts 701 are respectively screwed with the stud 702, and the length of the pull rod 7 is changed by changing the connection depth of the bolt 701 and the stud 702, so that the angle between the connecting rod 11 and the fixing device 3 is changed.
In this embodiment, as shown in fig. 3, the front end of the cutter head 5 is a cutting edge 19, the rear end is a push-pull handle 16, the cutter head 5 is provided with a scale 17 penetrating up and down, two sides of the cutter head 5 are respectively provided with a notch 18 with a distance of 1mm, the arc plate 8 is provided with a buckle 23 for being clamped at the notch 18 to ensure the required length of the cutter head, and in this embodiment, the shape of the cutter head is a shape structure similar to a Luoyang shovel.
In this embodiment, as shown in fig. 4, the connecting arm 4 is a telescopic connecting arm, the connecting arm 4 is connected with the supporting rod through a connecting piece, the connecting arm 4 includes a plurality of connecting units 21 connected in sequence, each connecting unit 21 is provided with a scale 18, and the length of the sampling radius is determined through the scale 18 during connection; the opposite connection positions of the two adjacent connection units 21 are respectively provided with a tooth-shaped structure, the tooth-shaped structures are meshed with each other and are connected through the first screw 20, and the tooth-shaped structures can ensure the connection tightness of the two connection units 21 and are not easy to slip; the number of the connecting arms 4 is even and the distribution should be symmetrical so that every two of the connecting arms cut into soil, in the embodiment, four connecting arms 4 are arranged, and an included angle formed between every two adjacent connecting arms 4 is 90 degrees, so that the arrangement can ensure that the cutter heads are pressed downwards symmetrically and uniformly, namely, the stress on two sides is consistent when the cutter heads in the 180-degree direction are pressed down simultaneously, and the expected cutting shape is realized; furthermore, when the radius of the sample to be taken is larger, the sample can be cut in a plurality of times, the rotation angle of each tool bit is consistent when the sample is rotated each time, and an accurate target sample can be obtained by combining the telescopic probe.
The device is used: by placing the device at the target location (some undisturbed lawn), the sampling center point can be accurately specified by the retractable probe and the sampling area can be determined by the graduated connecting arm. The tool bit and the fixing device which are suitable for the target container (the flowerpot with big top and small bottom) are selected, and the angle between the tool bit and the ground (namely the longitudinal and transverse curvature and the included angle between the tool bit and the ground which are suitable for the flowerpot) are adjusted. And (5) performing sample cutting by adopting a mode of pressing the diagonal cutter heads simultaneously. If the sampling area is smaller, the operation can be completed once (the diagonal cutter head is pressed twice), if the sampling area is larger, the cutter head can be pulled out by utilizing a push-pull handle on the cutter head, the in-situ rotation is conducted for multiple cutting by utilizing the guiding direction of the telescopic probe, and the complete test sample is obtained by means of the pressure inside the shape of the cut sample (the shape with the big top and the small bottom on the flowerpot) and the extraction of the lifting handle.
In this specification, the invention has been described with reference to specific embodiments thereof. It will be apparent, however, that various modifications and changes may be made without departing from the spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims (5)

1. The undisturbed grassland sample sampling device is characterized by comprising a vertically arranged supporting rod, wherein the bottom end of the supporting rod is connected with a vertical telescopic probe, m connecting arms perpendicular to the supporting rod are arranged at the bottom end of the supporting rod, m=2n, n is larger than or equal to 1, n is a natural number, the free ends of the connecting arms are respectively connected with a fixing device for fixing a cutter head, the fixing device comprises a hollow arc-shaped plate and a pull rod, the arc-shaped plate is used for penetrating the cutter head, the inner surface of the arc-shaped plate is movably connected with one end of a connecting rod, the other end of the connecting rod is fixedly connected with the connecting arm, one end of the pull rod is fixed on the arc-shaped plate and is arranged at the midpoint of 1/3 part of the outer edge of one end of the cutter head extending out of the arc-shaped plate, the other end of the pull rod is connected with the connecting rod, the pull rod is a telescopic pull rod, and the angle between the connecting arm and the fixing device is changed by adjusting the length of the pull rod, so that the cutter head on the fixing device is matched with a container for holding the cutter head and the sample, and the cutter head on the same vertical direction and vertical direction;
the connecting arm comprises a plurality of connecting units which are connected in sequence, tooth-shaped structures are respectively arranged at the opposite connection positions of the two adjacent connecting units, and the tooth-shaped structures are engaged relatively and connected through a fixing piece;
the pull rod comprises two bolts and a double-headed screw, one end of one bolt is fixed on the arc-shaped plate, one end of the other bolt is fixed on the connecting rod, the two bolts are respectively screwed with the double-headed screw, and the length of the pull rod is changed by changing the connection depth of the bolts and the double-headed screw.
2. The undisturbed lawn sample sampling device of claim 1, wherein one end of the connecting rod is movably connected with the arc plate through a bolt seat, and one end of the connecting rod is arranged at a midpoint of 1/3 of an outer edge of one end of the handle extending out of the arc plate.
3. The undisturbed lawn sample sampling device as defined in claim 1, wherein the connecting arms are four, and the angle formed by two adjacent connecting arms is 90 degrees, and the connecting arms are respectively connected with the supporting rod through connecting pieces.
4. The undisturbed lawn sample sampling device of claim 1, further comprising a pull handle disposed at a top end of the strut for pulling a sample.
5. The undisturbed lawn sample sampling device of claim 1, wherein a clasp is provided on an arcuate plate of the fixture for securing the position of the cutter head.
CN201710403343.6A 2017-06-01 2017-06-01 Undisturbed grassland sample sampling device Active CN107219088B (en)

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