CN214667816U

CN214667816U - Geological sampling mechanism

Info

Publication number: CN214667816U
Application number: CN202120919085.9U
Authority: CN
Inventors: 段林江; 唐爱东; 胥芮铭
Original assignee: Sichuan Shudu Geological Engineering Survey Co ltd
Current assignee: Sichuan Shudu Geological Engineering Survey Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-09
Anticipated expiration: 2031-04-30

Abstract

The utility model provides a geology sampling mechanism, the purpose is solved current geology sampling mechanism and is acquireed the technical problem that soil sample drops from the bottom easily when soil sample. The adopted technical scheme is as follows: a geological sampling mechanism comprising: the drill comprises a hollow drill bit, a rod core arranged in the drill bit and a spiral blade surrounding the rod core; wherein the helical blade divides a space between the rod core and the drill bit into helical channels; a sealing piece is arranged at the inlet of the bottom end of the spiral channel, and the top end of the sealing piece touches the lower surface of the spiral blade and is hinged with the drill bit; when the drill bit tunnels downwards, the sealing piece is pushed by soil to turn backwards in the spiral channel and is attached to the lower surface of the spiral blade; when the drill bit is lifted upwards, the sealing piece rotates forwards under the pushing of soil to seal the spiral channel; the drill bit is provided with a limiting structure for preventing the sealing piece from crossing a vertical position when rotating forwards.

Description

Geological sampling mechanism

Technical Field

The utility model relates to a geological exploration equipment technical field, concretely relates to geological sampling mechanism.

Background

Variability of soil and groundwater environment, complexity of stratum structure, high discreteness of pollutant space-time distribution, concealment, long-term accumulation, low-dose toxicity release and slowness of removal, so that soil and groundwater environment investigation, monitoring, health risk assessment, management and pollution remediation methods are different from atmospheric and surface environments.

In order to determine the contamination of soil and groundwater, the subsurface earth formations need to be sampled by a drilling rig. The drilling machine drives the drill rod to rotate, so that the drill rod drills downwards, and after the drill rod drills to a preset depth, the drill rod is lifted upwards, and the soil sample retained in the drill rod can be obtained. In the process of lifting the drill rod upwards, the soil sample at the bottom end of the drill rod is easy to fall out of the drill rod, so that the soil sample is partially lost.

Disclosure of Invention

An object of the utility model is to provide a geology sampling mechanism, it can avoid soil sample to deviate from the drilling rod bottom to the soil sample that makes the acquisition is more complete, and the degree of conformity of constituteing with secret soil layer is higher.

In order to achieve the above object, the utility model adopts the following technical scheme:

a geological sampling mechanism comprising: the drill comprises a hollow drill bit, a rod core arranged in the drill bit and a spiral blade surrounding the rod core; wherein the helical blade divides a space between the rod core and the drill bit into helical channels; a sealing piece is arranged at the inlet of the bottom end of the spiral channel, and the top end of the sealing piece touches the lower surface of the spiral blade and is hinged with the drill bit; when the drill bit tunnels downwards, the sealing piece is pushed by soil to turn backwards in the spiral channel and is attached to the lower surface of the spiral blade; when the drill bit is lifted upwards, the sealing piece rotates forwards under the pushing of soil to seal the spiral channel; the drill bit is provided with a limiting structure for preventing the sealing piece from crossing a vertical position when rotating forwards.

Optionally, a first sleeve with two through ends is arranged at the top end of the sealing piece, and a hinge shaft is penetrated through the first sleeve; the drill bit is provided with a first positioning hole penetrating through the inner peripheral surface of the drill bit, and the rod core is provided with a second positioning hole corresponding to the first positioning hole; and the two ends of the hinge shaft are respectively positioned in the first positioning hole and the second positioning hole.

Optionally, the first positioning hole is provided with an internal thread, the hinge shaft is provided with an external thread corresponding to the external section of the first positioning hole, and the hinge shaft is in threaded connection with the first positioning hole; and a hexagonal groove is formed in the outer end face of the hinge shaft.

Optionally, a second sleeve is arranged at the bottom end of the sealing member, and one end of the second sleeve, which faces the rod core, is closed; a guide rod penetrates through the second sleeve, and the drill bit is provided with a guide through hole for the guide rod to penetrate through; the extending direction of the guide through hole corresponds to the moving track of the guide rod when the sealing member rotates, and the guide through hole forms a limiting structure of the drill bit.

Optionally, a spring for pushing the guide rod outwards is arranged in the second sleeve; the side of guide bar rigid coupling a locating part, the second sleeve is equipped with the bar hole that runs through its inner peripheral face, the bar hole extends and constitutes spacingly to the locating part along second telescopic length direction.

Optionally, the limiting member is a screw or a threaded rod, and a threaded hole for mounting the limiting member is formed in a side surface of the guide rod.

The utility model discloses a theory of operation does: the drill bit is arranged at the bottom end of the drill rod, and the drill rod is driven by the drilling machine to drive the drill bit to rotate, so that the drill bit tunnels underground. In the downward tunneling process, the spiral blade cuts soil in a rotating advancing mode; the sealing piece can be pushed by soil to turn backwards and upwards and is attached to the lower surface of the spiral blade, so that the spiral channel is in an open state, and soil samples can enter the drill rod along the spiral channel and are filled in the drill rod. After the drill is drilled to a preset depth, the soil in the drill bit loses the soil layer support along with the upward lifting of the drill rod and slides downwards along the spiral channel; at the moment, the sealing piece can rotate downwards under the pushing of the self gravity and the sliding soil, so that the spiral channel is cut off, and the soil is prevented from continuously falling off.

Therefore, the utility model has the advantages that: the soil sample can be effectively prevented from falling off from the bottom end of the drill rod, so that the obtained soil sample is more complete and has higher conformity with the underground soil layer, and the pollution degree of the underground soil layer can be more reliably evaluated.

Drawings

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

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the closure member sealing the spiral channel;

FIG. 3 is a schematic view of the spiral channel in an open state;

FIG. 4 is a schematic view of the assembly of the hinge shaft, guide bar and closure;

FIG. 5 is a schematic view of the stem core being provided with a second positioning hole;

reference numerals: 1. a drill bit; 2. a rod core; 3. helical leaves; 4. a closure member; 5. a first sleeve; 6. hinging a shaft; 7. a second positioning hole; 8. a second sleeve; 9. a guide bar; 10. a guide through hole; 11. a limiting member; 12. and (4) strip-shaped holes.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Embodiments of the present invention will be described in detail below with reference to fig. 1 to 5.

The embodiment of the utility model provides a geology sampling mechanism, this geology sampling mechanism includes: the drill bit comprises a hollow drill bit 1, a rod core 2 arranged in the drill bit 1 and spiral blades 3 surrounding the rod core 2. It should be understood that the drill bit 1, the core 2 and the helical blades 3 are integrally fixed. The helical blades 3 divide the space between the shank core 2 and the drill bit 1 into helical channels. The inlet of the bottom end of the spiral channel is provided with a sealing piece 4, and the top end of the sealing piece 4 touches the lower surface of the spiral blade 3 and is hinged with the drill bit 1. When the drill bit 1 tunnels downwards, the sealing piece 4 is pushed by soil to turn backwards in the spiral channel and is attached to the lower surface of the spiral blade 3; when the drill bit 1 is lifted upwards, the sealing piece 4 rotates forwards under the pushing of soil to seal the spiral channel. It should be understood that the forward direction of the helical blade 3 as the drill bit 1 rotates is referred to as "forward". The drill bit 1 is provided with a limiting structure for preventing the sealing piece 4 from crossing the vertical position when rotating forwards.

Explaining the specific embodiment of the utility model below, install drill bit 1 in the bottom of drilling rod, drive drill bit 1 through the drilling rig drive drilling rod and rotate, make drill bit 1 tunnel to the underground. In the downward tunneling process, the spiral blade 3 cuts soil in a rotating advancing mode; the sealing piece 4 can be pushed by soil to turn backwards and upwards and is attached to the lower surface of the spiral blade 3, so that the spiral channel is in an open state, and soil samples can enter the drill rod along the spiral channel and are filled in the drill rod. After the drill is drilled to a preset depth, the soil in the drill bit 1 loses the soil layer support along with the upward lifting of the drill rod and slides downwards along the spiral channel; at this time, the sealing member 4 is pushed by its own weight and the sliding soil to rotate downward, thereby cutting off the spiral passage and preventing the soil from continuously falling off. The utility model discloses can effectively avoid soil sample to drop from the drilling rod bottom to the soil sample that makes the acquisition is more complete, and is higher with the degree of conformity that secret soil layer is constituteed, and then assesss the contaminated degree on secret soil layer more reliably.

In one embodiment disclosed in the present application, a first sleeve 5 with two through ends is disposed at the top end of the sealing member 4, and a hinge shaft 6 is penetrated through; the drill bit 1 is provided with a first positioning hole penetrating through the inner peripheral surface of the drill bit, and the rod core 2 is provided with a second positioning hole 7 corresponding to the first positioning hole; and two ends of the hinge shaft 6 are respectively positioned in the first positioning hole and the second positioning hole 7. It will be understood that the closure 4 is placed in the helical channel, and the hinge shaft 6 is passed through the first locating hole and the first sleeve 5 in sequence, and through the second locating hole 7; and then, fixedly connecting the articulated shaft 6 with the drill bit 1 by welding and the like, and then assembling the sealing member 4 and the articulated shaft 6.

In one embodiment disclosed in the present application, the first positioning hole is provided with an internal thread, the hinge shaft 6 is provided with an external thread corresponding to the external section of the first positioning hole, and the hinge shaft 6 is in threaded connection with the first positioning hole; and a hexagonal groove is formed in the outer end face of the hinge shaft 6. It should be understood that the hinge shaft 6 is fixedly connected to the first positioning hole of the drill bit 1 in a threaded manner, so as to facilitate later maintenance or replacement of the hinge shaft 6 and the sealing member 4.

In one embodiment disclosed in the present application, the bottom end of the sealing member 4 is provided with a second sleeve 8, and the second sleeve 8 is closed towards one end of the rod core 2; a guide rod 9 penetrates through the second sleeve 8, and the drill bit 1 is provided with a guide through hole 10 for the guide rod 9 to pass through; the extending direction of the guide through hole 10 corresponds to the moving track of the guide rod 9 when the sealing member 4 rotates, and the guide through hole 10 forms a limiting structure of the drill bit 1.

In one embodiment disclosed in the present application, a spring for pushing the guide rod 9 outwards is arranged in the second sleeve 8; the side of guide bar 9 rigid coupling a locating part 11, second sleeve 8 is equipped with the bar hole 12 that runs through its inner peripheral face, bar hole 12 extends and constitutes spacingly to locating part 11 along the length direction of second sleeve 8. It will be appreciated that under the force of the spring, the guide rods 9 will be pushed outwardly against the wall of the earthen layer on the outside of the drill bit 1. When the drill bit 1 is lifted upwards, the soil layer wall applies downward force to the guide rod 9, so that the sealing piece 4 is driven to rotate downwards to seal the spiral channel. Furthermore, as the sealing member 4 is turned backwards and upwards or turned downwards, the guiding rod 9 will adjust its position in the second sleeve 8 spontaneously under the action of the soil layer wall outside the drill bit 1 and the action of the spring, preventing the guiding rod 9 from protruding from the outer wall of the drill bit 1.

In one embodiment disclosed in the present application, the limiting member 11 is a screw or a threaded rod, and a threaded hole for installing the limiting member 11 is formed in a side surface of the guide rod 9. It will be appreciated that the assembly of the guide rod 9 with the second sleeve 8 is completed by passing the guide rod 9 through the second sleeve 8 and screwing the stop 11.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, and these changes and modifications are intended to fall within the scope of the invention.

Claims

1. A geological sampling mechanism, comprising:

a hollow drill bit (1); and

a rod core (2) arranged in the drill bit (1); and

a helical blade (3) surrounding the rod core (2);

wherein the spiral blade (3) divides the space between the rod core (2) and the drill bit (1) into spiral channels;

a sealing piece (4) is arranged at the inlet of the bottom end of the spiral channel, and the top end of the sealing piece (4) is contacted with the lower surface of the spiral blade (3) and is hinged with the drill bit (1);

when the drill bit (1) tunnels downwards, the sealing piece (4) is pushed by soil to turn backwards in the spiral channel and is attached to the lower surface of the spiral blade (3); when the drill bit (1) is lifted upwards, the sealing piece (4) rotates forwards under the pushing of soil to seal the spiral channel; the drill bit (1) is provided with a limiting structure for preventing the sealing piece (4) from crossing a vertical position when rotating forwards.

2. The geological sampling mechanism of claim 1, wherein: the top end of the sealing piece (4) is provided with a first sleeve (5) with two through ends, and a hinge shaft (6) is penetrated through; the drill bit (1) is provided with a first positioning hole penetrating through the inner peripheral surface and the outer peripheral surface of the drill bit, and the rod core (2) is provided with a second positioning hole (7) corresponding to the first positioning hole; and two ends of the hinge shaft (6) are respectively positioned in the first positioning hole and the second positioning hole (7).

3. The geological sampling mechanism of claim 2, wherein: the first positioning hole is provided with internal threads, the outer section of the articulated shaft (6) corresponding to the first positioning hole is provided with adaptive external threads, and the articulated shaft (6) is in threaded connection with the first positioning hole; the outer end face of the hinge shaft (6) is provided with a hexagonal groove.

4. A geological sampling mechanism according to any of claims 1-3, wherein: a second sleeve (8) is arranged at the bottom end of the sealing piece (4), and one end, facing the rod core (2), of the second sleeve (8) is closed; a guide rod (9) penetrates through the second sleeve (8), and the drill bit (1) is provided with a guide through hole (10) for the guide rod (9) to pass through; the extending direction of the guide through hole (10) corresponds to the moving track of the guide rod (9) when the sealing piece (4) rotates, and the guide through hole (10) forms a limiting structure of the drill bit (1).

5. The geological sampling mechanism of claim 4, wherein: a spring which pushes the guide rod (9) outwards is arranged in the second sleeve (8); the side of guide bar (9) rigid coupling a locating part (11), second sleeve (8) are equipped with bar hole (12) that run through its inner and outer peripheral face, bar hole (12) extend and constitute spacingly to locating part (11) along the length direction of second sleeve (8).

6. The geological sampling mechanism of claim 5, wherein: the limiting piece (11) is a screw or a threaded rod, and a threaded hole for mounting the limiting piece (11) is formed in the side face of the guide rod (9).