KR101858738B1 - Sampling device for chloride content test in concrete structure - Google Patents

Abstract

The present invention relates to a device for collecting a sample for a chloride test in concrete, which includes: an electric drill having a drill head and a drill bit coupled to the drill head for collecting a sample of a concrete structure during a rotary operation; a support member having one side coupled to the drill head and an opposite side positioned at an end portion of the drill bit so that the drill bit constituting the electric drill is disposed at the center; and a sample outlet having one end detachably mounted to the support member and a remaining end coming into close contact with the concrete structure so as to discharge the sample to the outside when the drill bit collects the sample upon operation of the electric drill. The sampling device for a chloride test in the concrete structure according to the present invention collects samples from a surface of the concrete structure for each depth, so that the durability of the concrete structure is accurately diagnosed, and the remaining endurance time of the concrete structure is calculated.

Description

Technical Field [0001] The present invention relates to a sampling device for a concrete chloride test,

The present invention relates to a sample collection apparatus for concrete chloride test, and more particularly, to a sample collection apparatus for a concrete chloride test for accurately and precisely obtaining a ground sample of a concrete structure in depth.

In the construction field, the proportion of cement concrete is absolute, and studies are being conducted steadily to secure the performance and stability of the concrete structures concerned.

Especially, in case of concrete structures exposed to the coastal environment, the problem of corrosion of reinforcing steel due to penetration of chloride is raised.

For example, cracks and detachment of concrete structures occur due to an increase in internal stress when rebar corrosion occurs, and there is a problem that concrete structures cause structural defects as the cross-sectional area of reinforcing bars decreases.

Therefore, there is a great deal of research on the method of measuring the amount of chloride, which is a main factor of corrosion of steel in concrete. However, there is a complication in the process of collecting and measuring the chloride sample, There are no specific regulations.

In order to evaluate the durability life of reinforced concrete structures in general, it is necessary to predetermine the time of corrosion of reinforcing bars and the remaining life of the structures in reinforced concrete structures.

For this purpose, the fracture samples are individually obtained from the specimens taken from the reinforced concrete structures, and the amount of chloride contained in the crushed specimens is measured and analyzed to evaluate the durability life of the actual reinforced concrete structures.

As a sample collection test method for the chloride content test, there are a powder sampling method and a core sampling method by electric drill.

Specifically, a powder sampling method using an electric drill is a method of collecting powdered powder generated by crushing concrete with an electric drill as a sample, similar to drilling for measuring the carbonation depth, And the specimen is cut according to the depth of the core and the concrete powder is obtained.

FIG. 1 shows a conventional method for collecting powder samples by an electric drill for concrete chloride test. The conventional method for collecting powder samples by electric drill for concrete chloride test is a drill bit for concrete of an electric drill 10, The concrete structure 21 is pierced by using the slurry 11 to collect the powdered powder 22 pulverized by the drill bit 11 as a sample and then a predetermined chloride test is performed using the powdered powder sample collected .

FIG. 2 is a view showing a core sampling method for a conventional concrete chloride test, in which a core sample 31 taken from a concrete structure or a concrete sample is cut into a predetermined thickness in the direction of chloride ion infiltration, And obtains the ground sample 34 from the sample piece 33.

In addition, in order to obtain the crushing sample 34 by depth in the core sample 31 in the case of the core sampling method for the conventional concrete chloride test, it is necessary to first measure the depth of the core sample 31 31 are cut to a predetermined thickness. At this time, a general cutting tool 32 equipped with a cutter blade is used for cutting.

The plurality of core sample pieces 33 thus cut by the depth are crushed through the crusher to individually obtain the crushed samples 16 and to measure and analyze the amount of chloride from the crushed samples 34 obtained.

However, when the core sample 31 is cut in order to obtain the ground sample 34 in depth as described above, the core sample 31 is lost by the thickness of the cutter blade in the cutting process.

Particularly, in order to measure the amount of chloride more precisely according to penetration depth, it is necessary to further narrow the cutting interval by depth. In the conventional method, there is a loss due to the thickness of the cutter blade. So that the number of the core sample pieces 33 can not be further increased.

Therefore, since the measurement under the condition that the number of the core sample pieces 33 is limited is not a finer measurement according to the penetration depth, the evaluation of the durability life of the actual concrete structure is limited, There is a problem in that it falls off.

Korean Patent Publication No. 2008-096057 (Oct. 30, 2008) Korean Patent Laid-Open Publication No. 1994-009680 (May 20, 1994)

SUMMARY OF THE INVENTION The object of the present invention is to provide a sample collecting apparatus for a concrete chloride test which can accurately diagnose the durability of a concrete structure by sampling samples on the surface of a concrete structure in depth .

A concrete sampling device for a concrete chloride test according to an embodiment of the present invention includes a drill head and an electric drill coupled to the drill head and having a drill bit for collecting a sample of a concrete structure during a rotary operation; A supporting means having one side coupled to the drill head and the opposite side positioned at an end portion of the drill bit so that the drill bit constituting the electric drill is centered; And a sample discharge port which is detachably attached to the support means and the other end is in close contact with the concrete structure and discharges the sample to the outside during sampling of the drill bit according to the operation of the electric drill .

And the support means includes a head coupling portion coupled to or separated from the drill head; A horizontal guide rod having one end coupled to both sides of the head coupling portion; A finishing plate coupled to the other end of the horizontal guide rod and having a drill bit through hole formed at the center thereof; An auxiliary support plate mounted on a horizontal guide rod positioned between the head engaging portion and the finishing plate and having a drill bit through hole formed at the center thereof; A spacing holder spaced apart from the finishing plate and the auxiliary support plate in the vertical direction and coupled at both ends thereof; And a spring mounted on a gap retaining port located between the finishing plate and the auxiliary supporting plate.

Here, the head coupling portion is divided into left and right head coupling portions, a head mounting hole is formed at the center, a fastener composed of a bolt and a nut is coupled to the upper portion, and a handle having a nut and bolt formed at the lower portion is coupled have.

Also, a latch coupled with a return spring is rotatably mounted on the left and right head coupling portions, and the guide rod fixing groove formed on the latch can be supported on the outer surface of the horizontal guide rod by the rotation operation of the latch.

In addition, the horizontal guide bar may have a predetermined diameter and a length, a scale may be formed on the outer circumference to measure the depth by the naked eye, and a spiral may be formed at the center to adjust the position of the auxiliary support plate.

Here, a spiral is formed at an end portion of the horizontal guide rod located in the electric drill direction, and the position guide means can be fastened to the spiral.

The spacing member may have a predetermined diameter and a length, a head portion formed at one end thereof, and a spiral formed at an outer peripheral surface of the other end portion. An intermediate connecting member having a hollow shape formed on an inner circumferential surface thereof with an inner surface coupling portion to which a spiral of the length adjusting member is coupled, and a spiral and a support tab formed on an outer circumferential surface thereof; A position restricting member which is spirally coupled to an outer circumferential surface located in the direction of the finishing plate with respect to the supporting jaw constituting the intermediate connecting member and limits the operation range of the finishing plate; And a fastener that is spirally coupled to an outer circumferential surface located in the direction of the electric drill on the basis of the support jaw constituting the intermediate connection member.

Here, the length adjusting member may be formed with a fine depth adjusting groove between the head portion and the spiral to visually confirm the insertion depth of the drill bit constituting the electric drill.

The sample discharge port includes a hollow finishing plate fixing member having a finishing plate coupling portion provided with a ring coupling groove formed on one side thereof and a spiral formed on an outer circumferential surface of the other end thereof. A discharge member in which a spiral is formed on one inner circumferential surface of the hollow shape, an inclined surface is formed on the inner circumferential surface of the other end, and a discharge hole is formed in a lower portion of the center; A sample outlet formed integrally with or spirally connected to the discharge hole of the discharge member and through which the sample is discharged; And a fixing ring fitted to the ring coupling groove of the finishing plate fixing member and fixing the finishing plate fixing member to the finishing plate.

The sample collecting apparatus for the concrete chloride test according to the present invention is capable of accurately diagnosing the durability of a concrete structure by collecting a sample by depth from the surface of the concrete structure and also calculating the remaining service life of the concrete structure .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a powder sample collection method using an electric drill for a conventional concrete chloride test. FIG.
2 is a view showing a core sampling method for a concrete chloride test according to a conventional technique.
3 is a perspective view showing a sample collecting apparatus for a concrete chloride test according to the present invention.
FIGS. 4 and 5 are a plan view and a side view, respectively, of a sample collection device for testing concrete chloride according to the present invention.
6 is a front view showing a head coupling portion of a support means constituting a sample collection device for testing concrete chloride according to the present invention.
7 is a view showing a horizontal guide rod constituting a sample collecting apparatus for a concrete chloride test according to the present invention.
8 and 9 are a front view and a cross-sectional view showing a finishing plate and a supporting plate constituting a sample collecting apparatus for a concrete chloride test according to the present invention.
FIG. 10 is an exploded perspective view showing a gap holding part constituting a sample collecting device for testing concrete chloride according to the present invention. FIG.
11 and 12 are an exploded perspective view and a cross-sectional view showing a sample discharge port constituting a sample collection device for testing concrete chloride according to the present invention.
13 is a side view showing a state of use of a sample collecting apparatus for testing concrete chloride according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. And is provided to fully illustrate the scope of the invention to those skilled in the art, and the invention is defined by the claims.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that " comprises, " or "comprising," as used herein, means the presence or absence of one or more other components, steps, operations, and / Do not exclude the addition.

FIG. 3 is a perspective view of a sample collection device for testing concrete chloride according to the present invention, and FIGS. 4 and 5 are cross-sectional views of concrete chloride 6 is a front view showing a head coupling portion of a supporting means constituting a sample collecting apparatus for testing concrete chloride according to the present invention, and Fig. 7 is a front view showing a concrete collecting apparatus for concrete chloride 8 and 9 are a front view and a sectional view showing a finishing plate and a supporting plate constituting a sample collecting apparatus for a concrete chloride test according to the present invention, FIG. 10 is a graph showing the relationship between the distance Is an exploded perspective view showing, 11, and 12 is an exploded perspective view and a sectional view of the sample outlet constituting a sampler for concrete chloride test in accordance with the present invention.

The apparatus for collecting concrete chloride 100 according to the present invention comprises an electric drill 200, a support means 300, and a sample discharge port 400.

The electric drill 200 comprises a drill head 220 and a drill bit 240 coupled to the drill head 220 and collecting a sample 20 of the concrete structure 10 during a rotary operation.

That is, the drill bit 240 rotates while the drill head 220 is operated while the drill bit 240 is mounted on the drill head 220, so that the sample of the concrete structure 10 (20).

Here, the electric drill 200 is not limited to the drawing, and an electric drill having a known drill head and a drill bit may be applied.

The supporting means 300 is coupled to the drill head 220 constituting the electric drill 200 at one side.

That is, the support means 300 is arranged in the same line as the drill bit 240 so that the drill bit 240 is positioned at the center of the inner side while one side is coupled to the drill head 220 constituting the electric drill 200 do.

The support means 300 includes a head coupling portion 310 coupled to or separated from the drill head 220, a horizontal guide rod 320 having one end coupled to both sides of the head coupling portion 310, A finishing plate 330 coupled to the other end of the horizontal guide rod 320 and having a drill bit through hole 331 formed at the center thereof and a finishing plate 330 disposed between the head fitting 310 and the finishing plate 330, A second support plate 340 mounted on the rod 320 and having a drill bit through hole 341 formed at the center thereof and a second support plate 340 disposed vertically spaced from the finish plate 330 and the auxiliary support plate 340, And a spring 360 mounted on the spacing holder 350 disposed between the finishing plate 330 and the auxiliary supporting plate 340. The spacing holder 350 is provided with a spacer 360,

That is, after the head coupling part 310 is coupled to the drill head 220, the support part 300 is coupled to both sides of the head coupling part 310 with a horizontal guide rod 320 having a predetermined diameter and length After the auxiliary support plate 340 is mounted on the horizontal guide bar 320, a spring 360 is mounted on the horizontal guide bar 320 and then a finishing plate 330, respectively.

The head coupling portion 310 is divided into left and right head coupling portions 310a and 310b and a head mounting hole 311 is formed at the center of the head coupling portion 310. A fastening hole 312 composed of a bolt and a nut And a knob 313 having a nut and a bolt formed thereon.

That is, the head coupling part 310 is easily coupled to the drill head 220 through the head coupling part 310 separated by the left and right head coupling parts 310a and 310b, 313 to facilitate the operation of the electric drill 200.

The latch 314 coupled to the restoring spring 315 is rotatably mounted on the left and right head coupling portions 310a and 310b and is formed in the latch 314 in accordance with the rotation operation of the latch 314. [ The guide rod fixing groove 314a is supported on the outer surface of the horizontal guide rod 320. [

That is, the left and right head coupling portions 310a and 310b not only fix the head coupling portion 310 to the electric drill 200 through the fastener 312 and the handle 313, It is possible to fix the position by engaging the guide rod fixing groove 314a with the scale 322 of the horizontal guide rod 320 through the rotation operation.

A rod coupling hole 316 is formed on both sides of the left and right head coupling portions 310a and 310b so that the horizontal guide rod 320 can move in the longitudinal direction.

At this time, a spiral may be formed on the inner circumferential surface of the rod coupling hole 316 so as to be coupled with a position guide member to be inserted.

The horizontal guide rods 320 are formed to have a predetermined diameter and length. Scales 322 are formed on the outer circumferential surface so that the depth can be measured with the naked eye, and a spiral 324 is formed in the center portion.

That is, the horizontal guide rods 320 are inserted through the scale 322 formed on the outer circumferential surface of the horizontal guide rods 320 so that the depth of insertion of the drill bits 240 of the electric drill 200 And the position of the auxiliary support plate 340 is adjusted through the spiral 324 formed at the center portion.

At this time, the scale 322 formed on the horizontal guide rods 320 adjusts the set depth, and the fine depth adjusting grooves of the gap maintaining grooves adjust the fine depth.

The horizontal guide rods 320 are coupled to the head coupling part 310 and are threaded to be fixed through a fastener such as a nut.

A position guide hole 326 having a spiral portion 326a formed on the outer surface thereof is inserted into the end portion of the horizontal guide rod 320 located in the direction of the electric drill 200.

That is, the position guide holes 326 are spirally coupled to the rod coupling holes 316 formed at both sides of the left and right head coupling portions 310a and 310b to guide the movement of the horizontal guide rods 320 .

At this time, a spiral portion 326a is formed on the outer surface of the position guide hole 326 so as to be engaged with the rod coupling hole 316. [

The finishing plate 330 has a predetermined thickness and a drill bit through hole 331 formed at the center thereof. A bar through hole 332 is formed on both sides of the finish plate 330, and a holding bar through hole 333 is formed on the upper and lower sides .

That is, the finishing plate 330 is formed with a drill bit through hole 331 through which a drill bit 240 can pass, and a horizontal guide rod 320 and spacing holes 350 Through hole 332 and a retaining bar through-hole 333 are formed for the movement of the support bar 332 and the support bar 333, respectively.

Here, the shape of the finishing plate 330 is not limited to the drawings, and it can be variously changed according to the environment, purpose, and the like.

The auxiliary support plate 340 has a predetermined thickness and a drill bit through hole 341 formed at the center thereof, a bar through hole 342 is formed on both sides thereof, and a holding bar through hole 343 is formed on the upper and lower sides .

That is, the auxiliary support plate 340 has a drill bit through hole 341 through which the drill bit 240 can penetrate, a bar through hole 342 through which the horizontal guide rod 320 passes, And a holding bar through-hole 343 is formed in the upper and lower portions to fix the gap maintaining hole 350 through the fastening hole.

Here, the shape of the auxiliary support plate 340 is not limited to the drawings, and various changes may be made according to the environment, purpose, and the like.

The gap holding tool 350 has a predetermined diameter and length and includes a head portion 351a at one end and a length adjusting member 351 formed at an outer circumferential surface of the other end portion to form a spiral 351b, An intermediate connecting member 352 having an inner surface engaging portion 352a coupled to the spiral 351b of the length adjusting member 351 and having a spiral 352b and a supporting step 352c formed on the outer circumferential surface thereof, A position restricting member 353 spirally coupled to an outer circumferential surface positioned in the direction of the finishing plate 330 with respect to the supporting limb 352c constituting the intermediate connecting member 352 and restricting the operation range of the finishing plate 330, And a fastener 354 which is coupled to the outer circumferential surface of the electric drill 200 in the direction of the electric drill 200 with reference to the support step 352c constituting the intermediate connecting member 352.

That is, after the intermediate connecting member 352 is fastened to the spiral 351b of the length adjusting member 351, the gap holding member 350 is inserted into the space holding member 350 so that the end of the length adjusting member 351 passes through the auxiliary supporting plate 340 The position of the intermediate connecting member 352 is adjusted according to the depth at which the sample 20 of the concrete structure 10 is to be sampled.

The length adjusting member 351 is provided between the head portion 351a and the spiral 351b so that the depth of the drill bit 240 constituting the drill 200 can be visually checked, Is formed.

That is, the operator can adjust the insertion depth of the drill bit 240 through the scale 322 formed on the horizontal guide rod 320 and the fine depth adjustment groove 351c of the length adjusting member 351.

The spring 360 is disposed in the gap retaining hole 350 located between the finishing plate 330 and the auxiliary support plate 340 to expand and contract.

That is, the spring 360 is mounted on the gap retaining hole 350 and is positioned between the finishing plate 330 and the auxiliary supporting plate 340 during use, Thereby holding the support plate 340 in its original state.

One end of the sample outlet 400 is detachably attached to the supporting means 300.

That is, the sample discharge port 400 is mounted on the drill bit through hole 331 of the finishing plate 330 constituting the supporting means 300 in use, and when not in use, the finishing plate 330 of the supporting means 300 Separated and stored separately.

The sample outlet 400 includes a hollow finishing plate fixing member 411 having a finishing plate engaging portion 411 having a ring engaging groove 412 formed on one side thereof and a spiral 413 formed on an outer circumferential surface of the other end thereof. A discharge member 420 having an inner circumferential surface formed with an inclined surface 422 and a lower central portion formed with a discharge hole 423, A sample outlet 430 integrally formed or spirally coupled to the discharge hole 423 of the discharge member 420 and through which the sample 20 is discharged, And a fixing ring 440 for fixing the finishing plate fixing member 410 to the finishing plate 330.

That is, after the sample outlet 430 is formed integrally with the discharge member 420, the sample discharge port 400 is connected to the spiral 421 of the discharge member 420 through the spiral 413 of the finishing plate fixing member 410 After the finishing plate fixing member 410 is inserted into the drill bit through hole 331 of the finishing plate 330, the fixing ring 440 is fitted to the ring coupling groove 412 to be fixed .

Hereinafter, an embodiment of a sample collection apparatus for testing a concrete chloride as described above will be described.

First, an electric drill 200 is prepared, which is composed of a drill head 220 and a drill bit 240 which is coupled to the drill head 220 and which takes a sample 20 of the concrete structure 10 during a rotary operation.

A head coupling part 310 coupled to or separated from the drill head 220 to the electric drill 200, a horizontal guide rod 320 having one end connected to both sides of the head coupling part 310, A finishing plate 330 coupled to the other end of the guide rod 320 and having a drill bit through hole 331 formed at the center thereof and a finishing plate 330 interposed between the head fitting 310 and the finishing plate 330, An auxiliary support plate 340 mounted on the support plate 320 and having a drill bit through hole 341 formed at the center thereof and spaced vertically from the finish plate 330 and the auxiliary support plate 340, A space holding member 350 and a spring 360 mounted on the spacing member 350 between the finishing plate 330 and the auxiliary supporting plate 340 are mounted.

Next, a finishing plate fixing portion 411 having a ring coupling groove 412 is formed on one side of the supporting means 300, and a hollow finishing plate fixing portion 411 having a spiral 413 formed on the outer circumferential surface of the other end thereof. And a discharge member 420 having a discharge hole 423 formed at a lower portion of the center thereof. The discharge member 420 has a hollow portion 422 formed on an inner circumferential surface thereof at one end thereof and an inclined surface 422 at an inner circumferential surface of the other end thereof. A sample outlet 430 integrally formed or spirally coupled to the discharge hole 423 of the discharge member 420 and through which the sample 20 is discharged and a discharge port 430 for discharging the sample 20 to the ring coupling groove 412 of the finishing plate fixing member 410 (400) including a fixing ring (440) for fitting the finishing plate fixing member (410) and fixing the finishing plate fixing member (410) to the finishing plate (330) Is completed.

Here, it is understood that the assembling procedure of the sample collecting apparatus for the concrete chloride test may be different from the above.

Next, the use condition of the sample collecting apparatus 100 for concrete chloride test will be described as follows.

The end of the discharge member 420 constituting the sample discharge port 400 constituting the sample collecting apparatus 100 for testing the concrete chloride is brought into close contact with the wall surface of the concrete structure 10, So that the drill bit 240 is brought into close contact with the wall surface of the concrete structure 10.

At this time, the finishing plate 330 constituting the sample discharging port 400 and the supporting means 300 moves in the direction of the electric drill 200, and the spring 360 maintains the compressed state.

When the electric drill 200 is operated, the drill bit 240 is inserted into the concrete structure 10 to transfer the sample 20 to the discharge member 420 of the sample discharge port 400, The sample 20 introduced into the member 420 is discharged to the outside through the discharge hole 423 of the discharge member 420 and the sample discharge port 430.

At this time, the worker is positioned at a desired depth of the concrete structure 10 through the scale 322 of the horizontal guide rods 320 constituting the support means 300 and the fine depth adjustment groove 351c of the gap retaining hole 350 The sample 20 can be collected.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made without departing from the essential characteristics of the present invention.

Therefore, the embodiments described in the present invention are not intended to limit the scope of the present invention, but are intended to be illustrative, and the scope of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are equivalent or equivalent thereto should be interpreted as being included in the scope of the present invention.

10: concrete structure 20: sample
100: Sampling device for concrete chloride test
200: Electric drill 220: Drill head
240: Drill bit 300: Support means
310: head coupling portion 310a: left head coupling portion
310b: right head coupling portion 311: head mounting hole
312: fastener 313: handle
314: latch 315: return spring
316: rod coupling hole 320: horizontal guide rod
322: scale 324: helix
330: finish plate 331: drill bit through hole
332: Ball through hole 333: Holding ball through hole
340: auxiliary support plate 341: drill bit through hole
342: Ball through hole 343: Holding ball through hole
350: spacing holder 351: length adjusting member
352: intermediate connecting member 353: position restricting member
354: fastener 360: spring
400: Sample outlet 410: Finishing plate fixing member
411: Finishing plate engaging portion 412: Ring engaging groove
413: helix 420: discharge member
421: helix 422: incline
423: Exhaust hole 430: Sample outlet
440: Retaining ring

Claims (9)

An electric drill coupled to the drill head and the drill head and having a drill bit for picking up a sample of the concrete structure during a rotary operation;
A supporting means having one side coupled to the drill head and the opposite side positioned at an end portion of the drill bit so that the drill bit constituting the electric drill is centered; And
And a sample discharge port which is attached to the support means so as to be detachable and detachable and whose other end is brought into close contact with the concrete structure and discharges the sample to the outside when sampling the drill bit according to the operation of the electric drill,
The support means includes a head coupling portion coupled to or separated from the drill head; A horizontal guide rod having one end coupled to both sides of the head coupling portion; A finishing plate coupled to the other end of the horizontal guide rod and having a drill bit through hole formed at the center thereof; An auxiliary support plate mounted on a horizontal guide rod positioned between the head engaging portion and the finishing plate and having a drill bit through hole formed at the center thereof; A spacing holder spaced apart from the finishing plate and the auxiliary support plate in the vertical direction and coupled at both ends thereof; And a spring mounted on a gap retaining port located between the finishing plate and the auxiliary support plate.
delete The method according to claim 1,
Wherein the head coupling portion is divided into left and right head coupling portions, a head mounting hole is formed at the center, a fastener having bolt and nut is coupled to the upper portion, and a handle having a nut and bolt formed at the lower portion is coupled to the head coupling portion. Sampling device for chloride testing.
The method of claim 3,
And the guide rod fixing groove formed on the latch is supported on the outer surface of the horizontal guide rod by the rotary operation of the latch so that the latch with the circular return spring is rotatably mounted on the left and right head coupling portions, .
The method according to claim 1,
The horizontal guide rod is formed to have a predetermined diameter and length, a scale is formed on the outer circumference to measure the depth by the naked eye, and a spiral is formed on the center portion to adjust the position of the auxiliary support plate. .
6. The method of claim 5,
Wherein a spiral is formed at an end portion of a horizontal guide rod located in the direction of the electric drill and a position guide member is fastened to the spiral.
The apparatus according to claim 1,
A length adjusting member having a predetermined diameter and a length, a head portion formed at one end thereof, and a spiral formed at an outer circumferential surface of the other end portion;
An intermediate connecting member having a hollow shape formed on an inner circumferential surface thereof with an inner surface coupling portion to which a spiral of the length adjusting member is coupled, and a spiral and a support tab formed on an outer circumferential surface thereof;
A position restricting member which is spirally coupled to an outer circumferential surface located in the direction of the finishing plate with respect to the supporting jaw constituting the intermediate connecting member and limits the operation range of the finishing plate;
And a fastener which is spirally coupled to an outer circumferential surface located in the direction of the electric drill on the basis of a support jaw constituting the intermediate connection member.
8. The method of claim 7,
Wherein the length adjusting member has a fine depth adjusting groove formed between the head and the spiral so as to visually confirm the insertion depth of the drill bit constituting the electric drill.
The apparatus according to claim 1,
A finishing plate fixing member having a hollow finish plate coupling portion having a ring coupling groove formed on one side and a spiral formed on an outer circumferential surface of the other end;
A discharge member in which a spiral is formed on one inner circumferential surface of the hollow shape, an inclined surface is formed on the inner circumferential surface of the other end, and a discharge hole is formed in a lower portion of the center;
A sample outlet formed integrally with or spirally connected to the discharge hole of the discharge member and through which the sample is discharged; And
And a fixing ring fitted in the ring coupling groove of the finishing plate fixing member and fixing the finishing plate fixing member to the finishing plate.

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