CN218669346U - Complete extraction device for broken core sample in drill hole - Google Patents

Abstract

The utility model discloses a complete remove device of broken core appearance in drilling, including refrigeration plant subassembly and the freezing body subassembly that can stretch into to the drilling, freezing body subassembly include with the cryogenic fluid business turn over pipe and the freezing heat exchanger of cavity form of refrigeration plant subassembly intercommunication, the cavity of the freezing heat exchanger of cavity form with cryogenic fluid business turn over pipe intercommunication, the outer still parcel of the freezing heat exchanger of cavity form has lower terminal surface open-ended heat preservation. Through stretching into the drilling with freezing body subassembly, utilize refrigeration plant subassembly to cool down freezing body subassembly, make the liquid between freezing body subassembly and the broken core appearance frozen to can be through mentioning the complete broken core appearance of taking out of freezing body.

Description

Complete extraction device for broken core sample in drill hole

Technical Field

The utility model relates to a complete remove device of broken core appearance in drilling belongs to geological exploration technical field.

Background

In geological exploration or structural core drilling sampling detection, core drilling sampling needs to be carried out on underground rocks or structures, and when core samples are broken and fall off in the core drilling lifting process. If the broken core sample needs to be taken out from the drilled hole, the existing method generally adopts a clamp to clamp the broken core sample or drill the core after glue injection.

However, in the actual operation process, the diameter of the drilled hole is relatively small, the position of the broken core sample is mostly deep, the gap around the broken core sample is small, the clamp is difficult to play, if the core is drilled after glue injection, the broken core sample is further broken and damaged even if the core is taken out, and the purpose of complete and nondestructive taking out cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a complete remove device of broken core appearance and method in drilling is provided, through will freezing the body subassembly and stretch into to the drilling in, utilize the refrigeration plant subassembly to cool down freezing the body subassembly, make the liquid between freezing body subassembly and the broken core appearance frozen to can be through mentioning the complete broken core appearance of taking out of freezing body.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a complete remove device of broken core appearance in drilling, includes refrigeration plant subassembly and the freezing body subassembly that can stretch into to the drilling, freezing body subassembly include with the cryogenic fluid business turn over pipe and the freezing heat exchanger of cavity form of refrigeration plant subassembly intercommunication, the cavity of the freezing heat exchanger of cavity form with cryogenic fluid business turn over pipe intercommunication, the outer terminal surface open-ended heat preservation that has still wrapped up of the freezing heat exchanger of cavity form.

The complete withdrawing device for the broken core sample in the drill hole is characterized in that: the lower end surface of the heat insulation layer protrudes out of the bottom surface of the hollow freezing heat exchanger.

The complete withdrawing device of the broken core sample in the drill hole is characterized in that: and a plurality of through grooves are formed in the lower end face of the heat insulation layer.

The complete withdrawing device of the broken core sample in the drill hole is characterized in that: also comprises an industrial endoscope and a liquid injection pipe which can extend into the drill hole.

The complete withdrawing device of the broken core sample in the drill hole is characterized in that: the hollow refrigeration heat exchanger is made of pure copper with good heat conducting property.

The complete withdrawing device of the broken core sample in the drill hole is characterized in that: the heat preservation layer is made of pearl wool, the bottom of the side face of the heat preservation layer protrudes out of the hollow freezing heat exchanger by 1-2 mm, and the opening of the heat preservation layer is of an outward opening structure.

The complete withdrawing device for the broken core sample in the drill hole is characterized in that: the liquid injection pipe is a medical injector bound on an iron wire.

The utility model has the advantages that:

1. the utility model fully utilizes water to be cooled to below 0 ℃ and becomes solid frozen body, freezes the broken core sample and the frozen body together, the ice has larger bonding and tensile strength, the whole mass of the broken core sample is relatively smaller, and the broken core sample can not fall and be damaged when lifting the frozen body and the frozen body of the broken core sample; when the temperature is above 0 ℃ and the normal temperature state, ice can be slowly melted into water, the crushed core sample is automatically separated from the frozen body, and the crushed core sample can be completely taken out;

2. under the anhydrous working condition, the water absorption and retention effects of the cotton gauze are fully utilized, the instilled water can be retained between the hollow freezing heat exchanger and the broken core sample, and the broken core sample can be conveniently taken out when the temperature is reduced to below 0 ℃;

3. through the structural design of the heat preservation layer of the freezing body assembly and the hollow freezing heat exchanger, the freezing body assembly and the broken core sample are not frozen with the inner wall of the drill hole while the freezing body assembly and the broken core sample are guaranteed to be frozen, and the freezing body assembly and the broken core sample which are frozen together can be conveniently and synchronously taken out.

Drawings

FIG. 1 is a schematic structural view of a device for completely taking out a broken core sample in a drill hole of the present invention;

fig. 2 is an enlarged schematic view of the first embodiment of the present invention at the position a in fig. 1;

fig. 3 is a schematic view of the structure of the first embodiment of the present invention at the freezing body assembly;

fig. 4 is an enlarged schematic view of the second embodiment of the present invention at the position a in fig. 1;

figure 5 is a cross-sectional view of a refrigeration body assembly according to a second embodiment of the invention;

fig. 6 is a schematic structural view of a refrigerating body assembly according to a second embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to specific embodiments.

Example 1

As shown in fig. 1 to fig. 3, a complete withdrawing device for a broken core sample in a drill hole comprises a refrigeration equipment assembly 1 and a freezing body assembly 4 which can extend into the drill hole 9, wherein the freezing body assembly 4 comprises a freezing fluid inlet and outlet pipe 43 and a hollow freezing heat exchanger 41 which are communicated with the refrigeration equipment assembly 1, a hollow cavity of the hollow freezing heat exchanger 41 is communicated with the freezing fluid inlet and outlet pipe 43, and an insulating layer 42 with an opening on the lower end surface is wrapped outside the hollow freezing heat exchanger 41. Wherein the refrigerating fluid inlet and outlet pipe 43 is communicated with the refrigerating equipment assembly 1 through the refrigerating fluid conveying pipe 2.

The refrigerating equipment 1 is a common industrial water chiller or canned liquid nitrogen and provides a low-temperature cold source, the refrigerating fluid conveying pipes 2 are two in total, one is a refrigerating fluid output pipe, the other is a refrigerating fluid return pipe, the refrigerating fluid is made of a rubber pipe, the refrigerating fluid 3 is antifreeze or liquid nitrogen, and the refrigerating fluid can still keep a flowable liquid state at the subzero temperature.

Under the anhydrous operating mode condition in drilling 9, through laying a cotton gauze 6 in the drilling, annotate the liquid pipe 7 through stretching into to drilling 9 in to annotate the liquid moist to it, then stretch into drilling 9 with freezing body subassembly 4 in, freeze the freezing realization to broken core sample to cotton gauze 6 cooling, be convenient for with the complete taking out of broken core sample. The liquid injected by the liquid injection pipe 7 may be water or other liquid convenient for freezing, and in this embodiment, the freezing is performed by using water. Annotate liquid pipe 7 for the medical syringe of ligature on the iron wire, be convenient for control annotate liquid pipe 7 and stretch into position and angle in the drilling, and the control injection volume that medical syringe can be fine.

The lower end face of the heat insulation layer 42 protrudes out of the bottom face of the hollow freezing heat exchanger 41, so that the hollow freezing heat exchanger 41 is isolated from the heat insulation layer 42, the hollow freezing heat exchanger 41 only cools and freezes the cotton gauze 6 below the hollow freezing heat exchanger, the freezing body assembly 4, the broken core sample 8 or the cotton gauze 6 cannot be frozen with the inner wall of the drill hole 9 when the broken core sample is frozen, and the frozen freezing body assembly 4 and the broken core sample 8 cannot be lifted out of the drill hole.

The lower end face of the heat preservation layer 42 is provided with a plurality of through grooves 44, when the hollow freezing heat exchanger 41 cools the cotton gauze 6, the liquid injection pipe 7 can be utilized to continuously perform liquid injection on the cotton gauze 6 to ensure the whole freezing effect, and the injected liquid enters the cotton gauze 6 at the position below the hollow freezing heat exchanger 41 through the through grooves 44.

In the embodiment, the freezing device further comprises an industrial endoscope 5 which can extend into the drill hole 9, whether the interior of the drill hole 9 is a waterless working condition or not can be judged through the industrial endoscope 5, the laying condition and the freezing state of the cotton gauze 6 can also be observed, so that the cotton gauze 6 can be conveniently paved and adjusted by the liquid injection pipe 7, the instillation position and the instillation amount of the cotton gauze 6 by the liquid injection pipe 7 can also be adjusted according to the freezing condition in the freezing process, and the freezing effect is further ensured.

The hollow freezing heat exchanger 41 is made of pure copper with good heat conductivity, heat exchange can be rapidly carried out between the hollow freezing heat exchanger 41 and cotton gauze, the heat preservation layer 42 is made of pearl wool, the bottom of the side face of the heat preservation layer protrudes out of the bottom of the hollow freezing heat exchanger 41 by 1-2 mm, the opening of the heat preservation layer is of an outward opening structure, when the bottom face of the hollow freezing heat exchanger 41 and the broken core sample 8 are pressed together, the heat preservation layer 42 on the side face is soft in material, the lower portion of the heat preservation layer deforms outwards in an expanding mode and is pressed on the surface of the broken core sample 8, water between the hollow freezing heat exchanger 41 and the broken core sample 8 forms certain separation and sealing with the outside, freezing can be accelerated, energy consumption is reduced, and freezing of the inner walls of the freezing body assembly 4, the broken core sample 8 or the cotton gauze 6 and the drilled hole 9 is avoided.

According to the method for completely taking out the broken core sample in the drill hole, under the working condition that no water exists in the drill hole, the step of taking out the broken core sample comprises the following steps:

(a) Placing the cotton gauze 6 down to the surface of the broken core sample 8 along the drill hole 9, and injecting liquid into the cotton gauze 6 through a liquid injection pipe 7 extending into the drill hole 9 for wetting; wherein, after the cotton gauze 6 is put into the drilled hole 9, the position condition of the cotton gauze 6 is observed through the industrial endoscope 5, and the cotton gauze 6 is paved through the liquid injection pipe 7;

(b) Putting the freezing body assembly 4 to the bottom along the drill hole 9, and pressing the cotton gauze 6 between the hollow freezing heat exchanger 41 and the crushing core sample 8;

(c) Starting the refrigeration equipment assembly 1, cooling the refrigerating fluid 3, continuously conveying the refrigerating fluid to the refrigerating body assembly 4, and cooling the hollow refrigerating heat exchanger 41 to be maintained below 0 ℃; when cavity form heat exchanger 41 cools down, through annotate liquid pipe 7 with the cotton gauze cloth 6 of cavity form heat exchanger 41 below is instilled liquid to the logical groove 44 of terminal surface under the heat preservation 42, keeps cotton gauze cloth 6 is in moist state, uses industry endoscope 5 observes cavity form heat exchanger 41 with broken core appearance 8 contact surface freezes the condition, adjusts annotate liquid pipe 7 instillation position.

(d) When the contact surface of the freezing body assembly 4 and the crushing core sample 8 is completely frozen, taking out the liquid injection pipe 7, and lifting the freezing body assembly 4 and the crushing core sample 8 which are frozen together out of the drill hole 9 through the freezing liquid conveying pipe 2;

(e) And stopping the operation of the refrigeration equipment component 1, melting the frozen body between the frozen body component 4 and the broken core sample 8 in an environment with the temperature of above 0 ℃, separating the broken core sample 8 from the hollow freezing heat exchanger 41, and finishing the complete and nondestructive taking out of the broken core sample 8.

The working principle of the embodiment is as follows:

1. freezing principle: the refrigeration equipment 1 cools the refrigerating fluid 3 to below 0 ℃, and conveys the refrigerating fluid to the interior of the hollow freezing heat exchanger 41 of the freezing body assembly 4, the refrigerating fluid 3 continuously circulates, the temperature of the hollow freezing heat exchanger 41 is reduced to and continuously kept below 0 ℃, liquid water around the hollow freezing heat exchanger 41 is changed into solid ice, and the bottom surface of the hollow freezing heat exchanger 41 and the top surface of the crushing core sample 8 are frozen together.

2. Heat conduction and heat preservation:

(1) Heat conduction and temperature reduction: considering the economic cost and the processing convenience comprehensively, the hollow freezing heat exchanger 41 is processed by pure copper, the heat conductivity coefficient is as high as 401W/(m.K), the temperature of the surrounding environment can be quickly reduced, and the water or water vapor between the hollow freezing heat exchanger 41 and the crushing core sample 8 can be quickly cooled and frozen because the water quantity between the hollow freezing heat exchanger and the crushing core sample is small and the height is only a few millimeters.

(2) Heat preservation and heat insulation: the heat conductivity coefficient of the ice is only 2.2W/(m.K), the speed of just starting to freeze is higher after water or water vapor around the hollow freezing heat exchanger 41 is frozen into ice, the ice plays a certain heat preservation role along with the increase of the thickness of the ice, the speed of changing liquid water at the periphery of the ice into solid ice is obviously reduced, the hollow freezing heat exchanger 41 cannot be frozen with the hole wall of the drill hole 9 which is far away in a short time, and the taking-out of the broken core sample 8 is not influenced; the heat preservation plate 42, such as a pearl wool packaging film, does not absorb water, and has a heat conductivity coefficient of only about 0.04-0.095W/(m.K), on one hand, the hollow freezing heat exchanger 41 is subjected to heat preservation and heat insulation, so that the energy consumption is reduced, meanwhile, the hollow freezing heat exchanger 41 can be prevented from being in contact with the hole wall of the drill hole 9, on the other hand, a certain amount of separation can be performed on the water body between the hollow freezing heat exchanger 41 and the crushing core sample 8 and the external water body, so that the heat conduction is reduced, and the freezing of other external water bodies can be prevented in a short time; the core sample is mostly made of concrete or rock, the thermal conductivity coefficient of the core sample is low and is about 0.4-7.0W/(m.K), and the heat conduction quantity with the outside is small in the freezing process of the water body between the hollow freezing heat exchanger 41 and the broken core sample 8.

3. Mechanical properties of ice: the compression strength of ice is 0.3-5.5 MPa, the shear strength is about 1/2 of the compression strength, the bonding strength of ice can reach more than 100MPa, the tensile strength of ice is about 0.27MPa, the two objects are frozen together by freezing water, when the ice is taken out, the weakest tensile strength of ice is the tensile strength of ice, the ice with the area of 1cm & lt 2 & gt can bear the tensile force of about 27N (about 2.75kg of force), and the weight of the ice is converted into a cylindrical reinforced concrete core sample with the diameter of 72mm, and the length of the cylindrical reinforced concrete core sample can reach about 250mm; if the frozen ice area on the surfaces of the two objects is larger, the bearable tension can be larger, and larger and heavier broken core samples 8 can be extracted.

4. Core sample freeze resistance: when the broken core sample 8 is made of concrete, the strength of the concrete before being frozen is generally required to be not lower than 5.0Mpa in order to avoid the damage of the concrete caused by freezing at the temperature of minus 15 ℃, and the strength of the hardened old concrete is generally greater than 5.0Mpa, namely, when the hollow freezing heat exchanger 41 and the broken core sample 8 are frozen together by cooling, the surface damage of the broken core sample 8 cannot occur.

Example 2

As shown in fig. 1 and fig. 4 to fig. 6, the complete withdrawing device for the broken core sample in the drill hole comprises a refrigeration equipment assembly 1 and a freezing body assembly 4 capable of extending into the drill hole 9, wherein the freezing body assembly 4 comprises a freezing fluid inlet and outlet pipe 43 communicated with the refrigeration equipment assembly 1 and a hollow freezing heat exchanger 41, a hollow cavity of the hollow freezing heat exchanger 41 is communicated with the freezing fluid inlet and outlet pipe 43, and an insulating layer 42 with an opening on a lower end surface is further wrapped outside the hollow freezing heat exchanger 41.

When the top surface of the broken core sample 8 in the drill hole 9 is positioned in water, the cotton gauze 6 is not needed to be dripped with water by the water injection pipe 7. Freezing with water in the bore 9.

The lower end face of the heat insulation layer 42 protrudes out of the bottom face of the hollow freezing heat exchanger 41, so that the hollow freezing heat exchanger 41 is conveniently isolated from the outside of the heat insulation layer 42, the hollow freezing heat exchanger 41 only cools and freezes water at the position below the hollow freezing heat exchanger, the freezing body assembly 4 and the broken core sample 8 are guaranteed not to freeze with the inner wall of the drill hole 9 when the broken core sample freezes, and the frozen freezing body assembly 4 and the broken core sample 8 cannot be lifted out of the drill hole.

In this embodiment, the endoscope also includes an industrial endoscope 5 which can be inserted into the borehole 9, and the industrial endoscope 5 can judge whether the borehole 9 is under a water-free condition or not, and can observe the state of the borehole 9 when frozen.

The hollow freezing heat exchanger 41 is made of pure copper with good heat conduction performance, heat exchange can be rapidly carried out between the hollow freezing heat exchanger 41 and cotton gauze, the heat preservation layer 42 is made of pearl wool, the bottom of the side face of the heat preservation layer protrudes out of the bottom of the hollow freezing heat exchanger 41 by 1-2 mm, the opening of the heat preservation layer is of an outward opening structure, when the bottom face of the hollow freezing heat exchanger 41 and the broken core sample 8 are pressed together, the heat preservation layer 42 on the side face is soft in material, the lower portion of the heat preservation layer deforms outwards in an expanding mode and is pressed on the surface of the broken core sample 8, water between the hollow freezing heat exchanger 41 and the broken core sample 8 forms certain separation and sealing with the outside, freezing can be accelerated, energy consumption is reduced, and freezing body assemblies 4, the broken core sample 8 and the inner wall of a drilling hole 9 are prevented from being frozen.

Under the working condition that water exists in the drill hole, the step of taking out the broken core sample comprises the following steps:

putting the freezing body assembly 4 down along the drilling hole 9 to the bottom, pressing the heat insulation layer 42 on the crushing core sample 8, and filling water 11 between the hollow freezing heat exchanger 41 and the crushing core sample 8;

(ii) starting the refrigeration equipment assembly 1, cooling the refrigerating fluid 3, and continuously conveying the refrigerating fluid to the refrigerating body assembly 4 to cool the hollow refrigerating heat exchanger 41 and maintain the temperature below 0 ℃;

（

) When water is completely frozen between the hollow freezing heat exchanger 41 and the broken core sample 8, the frozen freezing body assembly 4 and the broken core sample 8 are lifted out of the drill hole 9 through the freezing fluid conveying pipe 2;

（

) And stopping the refrigeration equipment component 1, melting the ice between the freezing body component 4 and the broken core sample 8 in the environment with the temperature of above 0 ℃, separating the broken core sample 8 from the hollow freezing heat exchanger 41, and finishing the complete and nondestructive taking out of the broken core sample 8.

In the whole implementation process, the industrial water chiller is automatically started, when the temperature of the antifreeze is reduced from 0 ℃ to-11 ℃, the time is about 16 minutes, the crushed core sample and the frozen body with water are frozen together, and the frozen body is lifted out from the drill hole; the operation of the industrial water chiller is stopped, the crushed core sample and the frozen body with water are placed in an environment with the temperature of about 29 ℃ to be iced into water in about 10 minutes, and the crushed core sample and the frozen body with water are naturally separated (the separation of the crushed core sample and the frozen body with water can be accelerated by adding warm water on ice).

To sum up, the utility model provides a pair of complete remove device of broken core appearance in drilling and method, through stretching into the drilling with freezing body subassembly, utilize the refrigeration plant subassembly to cool down freezing body subassembly, make the liquid between freezing body subassembly and the broken core appearance frozen to can be through mentioning the complete broken core appearance of taking out of freezing body.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a complete remove device of broken core appearance in drilling which characterized in that: including refrigeration plant subassembly (1) and freezing body subassembly (4) that can stretch into in drilling (9), freezing body subassembly (4) include with refrigerating fluid business turn over pipe (43) and the freezing heat exchanger (41) of cavity form of refrigeration plant subassembly (1) intercommunication, the cavity of the freezing heat exchanger (41) of cavity form with refrigerating fluid business turn over pipe (43) intercommunication, cavity form freezing heat exchanger (41) outer still parcel has terminal surface open-ended heat preservation (42) down.

2. The apparatus for removing a broken core sample from a borehole as set forth in claim 1, wherein: the lower end surface of the heat insulation layer (42) protrudes out of the bottom surface of the hollow refrigeration heat exchanger (41).

3. The apparatus for removing a broken core sample from a borehole as set forth in claim 2, wherein: the lower end face of the heat-insulating layer (42) is provided with a plurality of through grooves (44).

4. The apparatus for taking out a broken core sample in a borehole as claimed in any one of claims 1 to 3, wherein: also comprises an industrial endoscope (5) which can extend into the drill hole (9) and an injection tube (7).

5. The apparatus of claim 4, wherein the apparatus further comprises: the hollow freezing heat exchanger (41) is made of pure copper with good heat conduction performance.

6. The apparatus of claim 5, wherein the means for removing the broken core sample from the borehole comprises: the heat preservation layer (42) is made of pearl wool, the bottom of the side face of the heat preservation layer protrudes out of the hollow freezing heat exchanger (41) by 1-2 mm, and the opening of the heat preservation layer is of an outward opening structure.

7. The apparatus of claim 6, wherein the means for removing the broken core sample from the borehole comprises: the liquid injection pipe (7) is a medical injector bound on an iron wire.

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