CN213902932U - Portable sand drilling and sampling device - Google Patents

Abstract

The utility model provides a portable sand drilling and sampling device, which comprises a handle, a drill rod and a drill bit, wherein the handle is connected with the first end of the drill rod; the first end of the drill bit is connected with the second end of the drill rod, a drilling knife edge is arranged at the second end of the drill bit, a soil storage column is arranged on the inner side of the drill bit, a helical blade is arranged on the outer peripheral side of the soil storage column, and an opening matched with the upper end of the helical blade in a guiding mode is formed in the upper end side of the soil storage column. The utility model discloses a set up handle, drilling rod and drill bit, the handle is connected with the first end of drilling rod, the vertical setting of drilling rod, the first end of drill bit is connected with the second end of drilling rod, the second end of drill bit sets up the well drilling edge of a knife, set up in the drill bit and deposit earth pillar and helical blade to set up the opening in the upper end of depositing the earth pillar, realize through rotatory helical blade with sand by the opening guide deposit the earth pillar in, the hourglass of sand when effectively preventing to lift the drill bit flows, improves sampling efficiency and accuracy.

Description

Portable sand drilling and sampling device

Technical Field

The utility model relates to an ecological scientific research instrument and equipment technical field especially relates to a portable sand drilling and sampling device.

Background

The soil being humanNon-renewable resources relying on survival and development have significant spatial heterogeneity due to the dual effects of natural factors and human activities. In regional soil resource evaluation and soil attribute mapping research work, soil samples at a certain depth are often required to be collected for analysis and determination. The traditional soil profile sampling method is to excavate a profile with a certain depth and then collect samples according to a soil occurrence layer or at equal intervals. However, because digging a soil profile is time-consuming and labor-consuming, the traditional soil profile sampling method is limited to shallow soil (less than 2m) sample collection, and deep soil (more than 2m) sample collection is usually dependent on professional soil taking equipment. In addition, the traditional soil profile sampling method is difficult to be carried out under the regional scale (larger than 10 multiplied by 10)⁵km²) And large-scale sampling is carried out, and the representativeness of the obtained samples is often limited by the number of the mining sections. In order to meet large-scale sampling in a regional scale and quickly obtain a deep soil (larger than 2m) sample, a portable high-efficiency soil sampling device needs to be designed urgently.

The traditional soil sampler adopts pressure to rotate or directly press the soil sampler into soil, the soil sampler is pulled out after a sleeve is filled with the soil to finish soil sampling, and the soil is mainly extracted by using cohesive force of the soil and friction force between a soil sample and the sleeve in the soil sampling process. However, the traditional soil sampler has higher requirements on soil characteristics, is only suitable for collecting loam and clay samples with strong plasticity, and has poor applicability to sandy soil with poor plasticity and weak cohesive force.

The traditional soil sampler mainly has two problems when drilling sandy soil: (1) when the soil sampler is lifted upwards, sandy soil easily flows out of the sleeve and is difficult to be taken out by the soil sampler, so that the sampling purpose cannot be achieved; (2) as the depth of the drill increases, the quicksand around the drill hole is highly susceptible to slip and collapse, resulting in the earth sampler being buried and difficult to remove.

SUMMERY OF THE UTILITY MODEL

The utility model provides a portable sand drilling and sampling device for solve among the prior art and lift the in-process sand and soil and flow easily at the geotome, the unable defect of taking out realizes stabilizing the sample, improves sample efficiency.

The utility model provides a portable sand drilling and sampling device, which comprises a handle, a drill rod and a drill bit, wherein the handle is connected with the first end of the drill rod;

the first end of the drill bit is connected with the second end of the drill rod, a drilling knife edge is arranged at the second end of the drill bit, a soil storage column is arranged on the inner side of the drill bit, a helical blade is arranged on the outer peripheral side of the soil storage column, and an opening matched with the upper end of the helical blade in a guiding mode is formed in the upper end side of the soil storage column.

According to the utility model provides a pair of portable sand drilling and sampling device, the bottom of depositing the earth pillar is equipped with toper sharp sword, toper sharp sword deposit the earth pillar with the drilling rod coaxial line.

According to the utility model provides a pair of portable sand drilling and sampling device, the drilling edge of a knife is triangle-shaped, follows the perpendicular to the direction of the axis of drill bit, the double-phase offside of the second end of drill bit sets up respectively the drilling edge of a knife.

According to the utility model provides a pair of portable sand drilling and sampling device still includes and separates husky sleeve pipe, separate husky sheathed tube internal diameter and be greater than the diameter of drill bit.

According to the utility model provides a pair of portable sand drilling and sampling device, it is equipped with the two-way joint to separate husky sheathed tube upper end.

According to the utility model provides a pair of portable sand drilling and sampling device, the bottom side of handle is equipped with first spliced pole, first spliced pole be equipped with the first draw-in groove of the second spliced pole joint adaptation of the first end of drilling rod.

According to the utility model provides a pair of portable sand drilling and sampling device, the second end of drilling rod is equipped with the third spliced pole, the third spliced pole is equipped with the second draw-in groove, the first end of drill bit be equipped with the fourth spliced pole of second draw-in groove joint adaptation.

According to the utility model provides a pair of portable sand drilling and sampling device, the handle cover is equipped with anti-skidding holding sleeve.

The utility model provides a pair of portable sand drilling and sampling device, through setting up the handle, drilling rod and drill bit, the handle is connected with the first end of drilling rod, the vertical setting of drilling rod, the first end of drill bit is held with the second of drilling rod and is connected, the second end of drill bit sets up the well drilling edge of a knife, set up in the drill bit and deposit earth pillar and helical blade, and set up the opening in the upper end of depositing the earth pillar, realize leading sand by the opening to deposit the earth pillar through rotatory helical blade, the hourglass of sand when effectively preventing to lift the drill bit flows, improve sample efficiency and accuracy.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the portable sand drilling and sampling device provided by the present invention;

FIG. 2 is a schematic structural view of a drill rod in the portable sand drilling and sampling device provided by the present invention;

fig. 3 is a schematic structural diagram of a drill bit in the portable sand drilling and sampling device provided by the present invention;

fig. 4 is a schematic structural view of a helical blade in the portable sand drilling and sampling device provided by the present invention;

fig. 5 is a schematic structural diagram of a soil column stored in the portable sand drilling and sampling device provided by the present invention;

fig. 6 is the structural schematic diagram of the sand separating sleeve in the portable sand drilling and sampling device provided by the present invention.

Reference numerals:

100. a handle; 110. a first connecting column; 120. an anti-slip grip sleeve; 200. a drill stem; 210. a second connecting column; 220. a third connecting column; 230. clamping the beads; 300. a drill bit; 310. drilling a cutting edge; 320. storing a soil column; 330. a helical blade; 340. a conical sharp knife; 350. a guide post; 360. an opening; 400. a sand-isolation sleeve; 410. a bi-directional joint; 420. and (7) clamping the table.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The portable sand drilling and sampling device of the present invention is described with reference to fig. 1 to 6, and comprises a handle 100, a drill rod 200 and a drill bit 300, wherein the handle 100 is connected to a first end of the drill rod 200;

the first end of the drill bit 300 is connected with the second end of the drill rod 200, the second end of the drill bit 300 is provided with a drilling knife edge 310, the inner side of the drill bit 300 is provided with a soil storage column 320, the outer peripheral side of the soil storage column 320 is provided with a helical blade 330, and the upper end side of the soil storage column 320 is provided with an opening 360 matched with the upper end of the helical blade 330 in a guiding manner. It will be appreciated that the handle 100 is horizontally disposed for hand grasping by an operator. The drill rod 200 is vertically arranged, the first end, namely the upper end, of the drill rod 200 is connected with the handle 100 to realize relative fixation, preferably, the first end of the drill rod 200 is connected with the bottom side of the middle position of the handle 100, and an operator can hold the handle 100 parts at two sides of the drill rod 200 to conveniently and uniformly apply force.

Further, the drill bit 300 is vertically disposed, and the axis of the drill bit 300 coincides with the axis of the drill rod 200. The second or lower end of the drill rod 200 is connected to the first or upper end of the drill bit 300, ensuring a relatively fixed position. That is, when the operator rotates the handle 100, the drill rod 200 drives the drill bit 300 to rotate synchronously with the handle 100.

Wherein, the second end, i.e. the lower end, of the drill bit 300 is provided with a drilling knife edge 310 for excavating earth and drilling, thereby increasing the drilling speed. The drill bit 300 is a hollow cylindrical structure, the inner top side of the drill bit 300 is provided with a soil storage column 320, and the upper end of the soil storage column 320 is fixedly connected with the inner top side of the drill bit 300. The periphery side of depositing the earth pillar 320 is equipped with helical blade 330, it is preferred that helical blade 330 sets up in reverse, helical blade 330's lower extreme and sand contact, helical blade 330's upper end and the 360 guide adaptations of opening that the upper end side of depositing the earth pillar 320 set up, that is to say, through rotatory helical blade 330, sand rises to helical blade 330's upper end along helical blade 330, and get into in depositing the earth pillar 320 through opening 360, store, through lifting up drill bit 300, will deposit earth pillar 320 and propose the well outside, in this process, the guard action of drill bit 300 prevents that sand of other depths from getting into depositing earth pillar 320, improve the degree of accuracy of taking a sample, prevent spilling of sample simultaneously and leak. When the soil storage column 320 is lifted to the outer side of the well, the sand and soil in the soil storage column 320 is poured out from the opening 360 by inclining the soil storage column 320, and the sampling of the sample is completed.

Preferably, the bottom end of the storage column 320 is provided with a guide column 350, and the helical blade 330 is arranged on the peripheral side of the guide column 350 to ensure the connection strength.

According to the utility model provides a pair of portable sand drilling and sampling device, the bottom of depositing earth pillar 320 is equipped with toper sharp sword 340, toper sharp sword 340 deposit earth pillar 320 with the drilling rod 200 coaxial line. It can be understood that the conical sharp knife 340 is arranged at the bottom end of the soil storage column 320, and the tip end of the conical sharp knife 340 faces downwards to cut off the plant root system in the drilling process, so that the pushing is facilitated. It is worth to be noted that the conical sharp knife 340, the soil storage column 320, the helical blade 330 and the drill rod 200 are coaxial, the diameter of the conical sharp knife 340 is smaller than the outer diameter of the helical blade 330, the plane where the lower end of the helical blade 330 is located and the fixed end of the conical sharp knife 340 are located on the same plane, so that sandy soil pushed away to the two sides by the conical sharp knife 340 in the drilling process is in contact with the lower end of the helical blade 330, and in the rotating process, the sandy soil moves upwards, and the sandy soil acted by the conical sharp knife 340 is relatively loose and sufficient, so that the guiding of the helical blade 330 is facilitated, and the sampling efficiency is improved.

According to the utility model provides a pair of portable sand drilling and sampling device, the drilling edge of a knife 310 is triangle-shaped, along the perpendicular to the direction of the axis of drill bit 300, the double-phase offside of the second end of drill bit 300 sets up respectively the drilling edge of a knife 310. It can be understood that the two drilling edges 310 are triangular, and preferably two drilling edges 310 are provided, and two drilling edges 310 are fixedly provided at the second end of the drill bit 300, are symmetrical about the axis of the drill bit 300, and are inclined towards the inner side of the drill bit 300 along the axial direction of the drill bit 300, so that the rapid drilling into the sandy soil is facilitated, and the drilling and sampling efficiency is improved.

According to the utility model provides a pair of portable sand drilling and sampling device still includes and separates husky sleeve pipe 400, the internal diameter that separates husky sleeve pipe 400 is greater than the diameter of drill bit 300. It will be appreciated that the sand exclusion sleeve 400 is intended to be placed in a well to prevent the collapse of the quicksand. The inner diameter of the sand-isolation sleeve 400 is slightly larger than the diameter of the drill bit 300 and is matched with the diameter of the well, so that the sand-isolation sleeve 400 can be inserted into the well to form a supporting effect on the wall of the well, the drill bit 300 penetrates through the sand-isolation sleeve 400 and can freely rotate and move up and down, and sampling is completed. The outer diameter of the sand-isolation casing 400 is matched with the diameter of the well, so that the inner wall of the well is supported. It should be noted that, in the actual drilling process, the diameter of the well is slightly larger than that of the drill bit 300 due to manual operation of drilling, so that the sand-isolation casing 400 can be completely put into the well to support the wall of the well. When the length of the drill rod 200 needs to be increased, the drill bit 300 is lifted up from the sand separation sleeve 400, the drill bit 300 and the drill rod 200 are disassembled, the drill rod 200 and the drill bit 300 are connected after the number of the drill rods 200 is increased, and the sand separation sleeve 400 is inserted into a well for drilling or sampling.

According to the utility model provides a pair of portable sand drilling and sampling device, the upper end that separates husky sleeve pipe 400 is equipped with two-way joint 410. It can be understood that the upper end of the sand-isolation casing 400 is provided with the bidirectional joint 410, so that the two sand-isolation casings 400 can be spliced to meet the requirement of the drilling depth. Specifically, the middle of the bidirectional connector 410 is provided with an annular clamping table 420, the outer diameter of the clamping table 420 is the same as that of the sand-separating sleeve 400, the two sides of the clamping table 420 are both provided with inserting parts, and the outer diameter of each inserting part is the same as that of the sand-separating sleeve 400. The grafting portion of ka tai 420 downside inserts the upper end that is located two-way joint 410 downside and separates husky sleeve pipe 400, and the grafting portion of ka tai 420 upside inserts the lower extreme that is located two-way joint 410 upside and separates husky sleeve pipe 400, realizes two and separates the concatenation of husky sleeve pipe 400, adapts to the degree of depth of well, guarantees the effect of strutting to the wall of a well.

According to the utility model provides a pair of portable sand drilling and sampling device, the bottom side of handle 100 is equipped with first spliced pole 110, first spliced pole 110 be equipped with the first draw-in groove of second spliced pole 210 joint adaptation of the first end of drilling rod 200. It can be understood that the first connecting column 110 is fixedly arranged in the middle of the bottom side of the handle 100, a first clamping groove is arranged in the first connecting column 110, the second connecting column 210 is arranged at the upper end of the drill rod 200, the second connecting column 210 is inserted into the first connecting column 110, and the drill rod 200 and the handle 100 can be detachably connected through the first clamping groove in a clamping manner, so that the assembly and the carrying are convenient. It should be noted that, the clamping bead 230 is disposed on the periphery of the second connection column 210, the clamping bead 230 can be elastically moved in a direction perpendicular to the axis of the second connection column 210, when assembling, the second connection column 210 is inserted into the first connection column 110, the clamping bead 230 is compressed toward the axis of the first connection column 110, when the clamping bead 230 moves to the position of the first slot, the clamping bead 230 elastically moves away from the axis of the first connection column 110 and is clamped in the first slot, so as to fix the handle 100 and the drill rod 200 relatively, and when the handle 100 is rotated, the drill rod 200 and the handle 100 rotate synchronously. During disassembly, the handle 100 or the drill rod 200 is pulled along the axial direction of the second connecting column 210 or the handle 100 and the drill rod 200 are pulled along the reverse direction at the same time, the clamping beads 230 are contracted and moved towards the axial direction of the second connecting column 210 by the extrusion force of the inner wall of the first connecting column 110 and slide out of the first clamping grooves, and the handle 100 and the drill rod 200 are disassembled.

According to the utility model provides a pair of portable sand drilling and sampling device, the second end of drilling rod 200 is equipped with third spliced pole 220, third spliced pole 220 is equipped with the second draw-in groove, the first end of drill bit 300 be equipped with the fourth spliced pole of second draw-in groove joint adaptation. It can be understood that the lower end of the drill rod 200 is provided with the third connecting column 220, the inner side of the third connecting column 220 is provided with the second clamping groove, the upper end of the drill bit 300 is provided with the fourth connecting column, the fourth connecting column is inserted into the third connecting column 220 and is clamped and fixed through the second clamping groove, the detachable connection between the drill rod 200 and the drill bit 300 is realized, and the assembly and the carrying are convenient.

It should be noted that, the clamping balls 230 are disposed on the periphery of the fourth connecting column, the clamping balls 230 can be elastically moved in a direction perpendicular to the axis of the fourth connecting column, when the assembly is performed, the fourth connecting column is inserted into the third connecting column 220, the clamping balls 230 are compressed in the axis direction of the fourth connecting column, when the clamping balls 230 move to the position of the second clamping groove, the clamping balls 230 elastically move in the axis direction away from the fourth connecting column and are clamped and fixed in the second clamping groove, so that the drill bit 300 and the drill rod 200 are relatively fixed, and when the handle 100 is rotated, the drill bit 300 and the drill rod 200 synchronously rotate. During disassembly, the drill rod 200 or the drill bit 300 is pulled along the axial direction of the fourth connecting column or the drill bit 300 and the drill rod 200 are pulled along the reverse direction at the same time, the clamping balls 230 are contracted and moved towards the axial direction of the fourth connecting column by the extrusion force of the inner wall of the third connecting column 220 and slide out of the second clamping groove, and the drill bit 300 and the drill rod 200 are disassembled.

Further, the first connecting column 110 and the second connecting column 210, and the third connecting column 220 and the fourth connecting column can be detachably connected by threads. It should be noted that the screwing rotation direction of the first connecting column 110 and the second connecting column 210 is the same as that of the third connecting column and the fourth connecting column, and is opposite to the screwing direction of the helical blade 330, that is, when the helical blade 330 guides sand and soil in the rotating handle 100, the first connecting column 110 and the second connecting column 210 rotate towards the screwing direction, and the third connecting column 220 and the fourth connecting column 220 also rotate towards the screwing direction.

Wherein, the second connection column 210 is connected with the third connection column 220 in a same adaptive manner, that is, if the length of a single drill rod 200 cannot meet the sampling depth, the third connection column 220 at the lower end of the second drill rod 200 can be clamped with the second connection column 210 at the upper end of the first drill rod 200, so as to meet the sampling depth requirement.

According to the utility model provides a pair of portable sand drilling and sampling device, handle 100 covers is equipped with anti-skidding grip 120. It can be understood that the anti-slip grip 120 is respectively sleeved on the handles 100 on both sides of the first connecting column 110 to increase the friction between the palm and the handles 100, so as to prevent the palm from slipping and falling off when the palm sweats.

The utility model provides a pair of portable sand drilling and sampling device's operating procedure is as follows:

selecting the number of the drill rods 200 and the sand-separating sleeves 400 according to the sampling depth;

inserting the second connecting column 210 at the upper end of the drill rod 200 into the first connecting column 110 at the bottom side of the handle 100 to realize the relative fixed connection of the drill rod 200 and the handle 100; the handle 100 is made of a hollow stainless steel pipe with the thickness of 3-5 mm, the diameter of 2.8-3.2 cm and the length of 60cm, the inner diameter of the first connecting column 110 is 2cm, the drill rod 200 is made of a solid stainless steel pipe with the diameter of 2.5cm and the length of 1m, the diameter of the second connecting column 210 is 2cm, and the inner diameter of the third connecting column 220 is 2 cm;

connecting a plurality of required drill rods 200 end to end in sequence, and splicing to a sufficient length;

inserting a fourth connecting column at the upper end of a drill bit 300 into a third connecting column 220 at the lower end of a drill rod 200 to realize the relative fixation of the drill bit 300 and the drill rod 200, wherein the diameter of the drill bit 300 is 8cm, the height of the drill bit 300 is 20cm, the thickness of the drill bit is 2cm, the height of an opening 360 is 6cm, the arc length is 8 cm-10 cm, the thickness of a helical blade 330 is 2mm, the height of a conical sharp knife 340 is 6 cm-8 cm, the height of a drilling knife edge 310 is 3 cm-4 cm, and the thickness of the drilling knife edge is 2 mm;

rotating clockwise and pressing down the handle 100, synchronously rotating the drill rod 200 and the drill bit 300 clockwise, drilling the well by the drill bit 300, at the moment, rotating the helical blade 330 anticlockwise, guiding the sandy soil, making the sandy soil enter the soil storage column 320 from the opening 360, after the soil storage column 320 is filled with the sandy soil, lifting the drill bit 300, inclining the drill bit 300, making the opening 360 face downwards, and making the sandy soil in the soil storage column 320 pour out from the opening 360;

repeating the above steps until the drilling depth reaches 1m, putting the sand-separating casing 400 into the well to form a support, taking out the drill rod 200 and the drill bit 300 through the inner side of the sand-separating casing 400, splicing a plurality of drill rods 200, inserting the spliced and lengthened drill rods 200 and drill bits 300 into the sand-separating casing 400, and sampling;

after sampling is completed, the handle 100 is pulled up to lift the drill bit 300 and the drill rod 200 together, and the drill bit 300 is tilted to have the opening 360 facing downward, so that the sample is poured out.

The utility model provides a pair of portable sand drilling and sampling device, through setting up the handle, drilling rod and drill bit, the handle is connected with the first end of drilling rod, the vertical setting of drilling rod, the first end of drill bit is held with the second of drilling rod and is connected, the second end of drill bit sets up the well drilling edge of a knife, set up in the drill bit and deposit earth pillar and helical blade, and set up the opening in the upper end of depositing the earth pillar, realize leading sand by the opening to deposit the earth pillar through rotatory helical blade, the hourglass of sand when effectively preventing to lift the drill bit flows, improve sample efficiency and accuracy.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims (8)

1. A portable sand drilling and sampling device is characterized by comprising a handle, a drill rod and a drill bit, wherein the handle is connected with a first end of the drill rod;

the first end of the drill bit is connected with the second end of the drill rod, a drilling knife edge is arranged at the second end of the drill bit, a soil storage column is arranged on the inner side of the drill bit, a helical blade is arranged on the outer peripheral side of the soil storage column, and an opening matched with the upper end of the helical blade in a guiding mode is formed in the upper end side of the soil storage column.

2. The portable sand drilling and sampling device of claim 1 wherein the bottom end of the column is provided with a conical point cutter, the column and the drill pipe being coaxial.

3. A portable sand drilling and sampling device as claimed in claim 1, wherein the drilling edge is triangular and is provided on opposite sides of the second end of the drill bit in a direction perpendicular to the axis of the drill bit.

4. The portable sand drilling and sampling device of claim 1 further comprising a sand exclusion sleeve having an inner diameter greater than the drill bit diameter.

5. A portable sand drilling and sampling device as claimed in claim 4, wherein the upper end of the sand exclusion sleeve is provided with a bi-directional fitting.

6. The portable sand drilling and sampling device of claim 1, wherein the handle has a first connecting post at a bottom side thereof, the first connecting post having a first engaging groove adapted to engage with a second connecting post at the first end of the drill rod.

7. The portable sand drilling and sampling device of claim 1, wherein the second end of the drill rod is provided with a third connecting column, the third connecting column is provided with a second clamping groove, and the first end of the drill bit is provided with a fourth connecting column matched with the second clamping groove in a clamping manner.

8. A portable sand drilling and sampling device as claimed in any one of claims 1 to 7, wherein the handle grip is provided with an anti-slip grip.

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