CN214576972U

CN214576972U - Sampling drilling tool with high extraction rate

Info

Publication number: CN214576972U
Application number: CN202120696536.7U
Authority: CN
Inventors: 张小明; 伦志其; 段延智
Original assignee: Dongguan City Construction Engineering Testing Center
Current assignee: Dongguan Construction Engineering Testing Center Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-02
Anticipated expiration: 2031-04-06

Abstract

The utility model relates to a pile foundation technical field of loosing core, more specifically says, and it relates to a sample drilling tool that extraction rate is high, and its technical scheme main points are: including the driving joint, the nipple, the outer tube, inner tube and drill bit, nipple and outer tube all cup joint with the driving joint, the nipple is located the outer tube, the inner tube cup joints with the nipple, the one end at the outer tube is connected to the drill bit, the washing structure has been seted up between driving joint and the drill bit, wash the feed liquor hole that the structure flows through in proper order including supplying the flush fluid, multichannel flowing liquid hole, the regulation hole, pipe space and play liquid hole, the regulating part has been inserted to the replacer in the driving joint, the regulating part is used for sealing the passageway between flowing liquid hole and the regulation hole, and the driving joint is provided with carries out the mounting fixed to the regulating part, the utility model discloses a sample drilling tool that the extraction rate is high can avoid reducing the extraction rate of sample drilling tool because of the flush fluid blowout too much or blowout too little.

Description

Sampling drilling tool with high extraction rate

Technical Field

The utility model belongs to the technical field of the pile foundation technique of loosing core and specifically relates to a sample drilling tool that extraction rate is high.

Background

Generally, after the construction of the cast-in-situ bored pile is completed, the pile foundation needs to be detected. The main methods for detecting the pile foundation comprise a static load test, a core drilling method, a low strain method, a high strain method, a sound wave transmission method and the like, wherein the core drilling method is a method for obtaining a pile foundation sample, has the characteristics of science, intuition, practicality and the like, and is widely applied to the aspect of detecting the concrete cast-in-place pile.

In the core drilling method, in order to improve the extraction rate in the sampling process, a single-action double-pipe sampling drilling tool can be used for sampling, the single-action double-pipe sampling drilling tool is a double-pipe drilling tool with an outer pipe rotating and an inner pipe not moving, and the damage of the friction vibration generated due to the rotation of the drilling tool to a sample can be effectively reduced. In the related art, when core drilling is performed, flushing fluid needs to be continuously sprayed out of a drill bit of a single-acting double-pipe sampling drilling tool, and then the drill bit needs to be cooled.

With respect to the related art among the above, the inventors consider that the following drawbacks exist; when the single-action double-pipe sampling drilling tool needs to drill and core different pile foundations at different rotating speeds, the ejection quantity of flushing liquid of the single-action double-pipe sampling drilling tool can not be adjusted, so that insufficient or excessive flushing liquid can be easily ejected, and the extraction rate of the single-action double-pipe sampling drilling tool is reduced.

SUMMERY OF THE UTILITY MODEL

In order to avoid reducing the extraction rate of the sampling drilling tool due to too much or too little flushing liquid spraying, the application provides a sampling drilling tool with high extraction rate.

The application provides a sample drilling tool that extraction rate is high adopts following technical scheme:

a sampling drilling tool with high extraction rate comprises a driving joint, an inner joint, an outer pipe, an inner pipe and a drill bit, wherein the inner joint and the outer pipe are both sleeved with the driving joint, the inner joint is positioned in the outer pipe, the inner pipe is sleeved with the inner joint, the drill bit is connected to one end, away from the driving joint, of the outer pipe, and a flushing structure is arranged between the driving joint and the drill bit;

the flushing structure comprises a liquid inlet hole, a plurality of liquid flow holes, an adjusting hole, a pipe gap and a liquid outlet hole, wherein flushing liquid sequentially flows through the liquid inlet hole, the plurality of liquid flow holes and the adjusting hole;

multichannel the vertical direction interval arrangement is followed to the flowing liquid hole, the feed liquor hole with the equal vertical setups in regulation hole, the feed liquor hole with the regulation hole communicates respectively in the multichannel the both sides in flowing liquid hole, just the feed liquor hole is located the central point that the drive connects puts, the regulating part has been inserted to the drive joint inner replaceability, the regulating part be used for with the flowing liquid hole with passageway between the regulation hole seals, just the drive joint is provided with and carries out the fixed mounting to the regulating part.

By adopting the technical scheme, when the core-pulling sampling is carried out by using the sampling drilling tool, flushing liquid enters the driving joint through the liquid inlet pipe, the flushing liquid in the driving joint flows into the space between the pipe gaps through the communicated liquid flow hole and the adjusting hole, and finally the flushing liquid is sprayed out of the drill bit through the liquid outlet hole to cool the drill bit, when core-pulling sampling is required to be carried out at a higher rotating speed, the number of the liquid flow holes communicated with the adjusting holes is increased by replacing the adjusting piece, thereby increasing the spraying amount of the flushing liquid, reducing the number of the liquid flow holes communicated with the adjusting holes by replacing the adjusting piece when core pulling sampling is required to be carried out at a lower rotating speed, therefore, the spraying amount of the flushing liquid is reduced, and the replaced adjusting piece is fixed through the fixing piece, so that the sampling drilling tool can avoid the reduction of the extraction rate of the sampling drilling tool due to too much spraying or too little spraying of the flushing liquid.

Preferably, the mounting hole has been seted up at the drive joint top, the regulation hole with the vertical intercommunication of mounting hole, the aperture of mounting hole is greater than the aperture of regulation hole, the regulating part has spacing portion and separation portion of interconnect, and is different the regulating part the separation portion length inequality, the outer wall of spacing portion can with the outer wall laminating of mounting hole, separation portion can with the inner wall laminating of regulation hole, the separation portion of regulating part inserts through the mounting hole in the regulation hole, the regulating part through spacing portion spacing in the mounting hole with between the regulation hole.

Through adopting above-mentioned technical scheme, the separation portion of regulating part inserts the downthehole back of regulation, and the separation portion can seal the passageway between regulation hole and the flowing liquid hole that it passed through, because the length of the separation portion of different regulating parts is inequality, consequently just can seal the flowing liquid hole and the regulation hole of different quantity through replacing the regulating part to the realization is to the regulation of washout liquid blowout volume.

Preferably, the mounting hole is round hole form, the internal thread has been seted up to the mounting hole, the mounting is the cake form, the external screw thread has been seted up to the mounting, the mounting can with mounting hole threaded connection.

Through adopting above-mentioned technical scheme, mounting and mounting hole threaded connection back, the mounting can with the spacing portion of regulating part support tightly in the mounting hole to the realization is to the fixed of regulating part.

Preferably, the cross-sectional area of the regulating hole is equal to the sum of the cross-sectional areas of the plurality of liquid flow holes connected thereto.

Through adopting above-mentioned technical scheme for when a plurality of flowing liquid pipes all relieved the closure with the regulating tube, the flush fluid can in time flow through the regulating tube.

Preferably, the liquid outlet holes are formed in a plurality, and the liquid outlet holes are formed in the circumferential direction around the rotation axis of the drill bit.

Through adopting above-mentioned technical scheme for when the flow of flush fluid increases, the flush fluid can in time be through going out liquid hole blowout.

Preferably, the liquid flowing hole is inclined downwards from the liquid inlet hole to the adjusting hole.

Through adopting above-mentioned technical scheme, the washing liquid of being convenient for in the inlet liquid hole flows into in the regulation hole.

Preferably, the top of the fixing piece is provided with a counter bore, and the counter bore is a polygonal hole.

By adopting the technical scheme, the counter bore is formed, so that people can conveniently use the tool to screw the fixing piece, and the fixing piece can be conveniently disassembled and assembled by people.

Preferably, the liquid outlet hole is inclined from the top of the drill bit to the outer side wall of the drill bit.

Through adopting above-mentioned technical scheme for the flush fluid can be by the lateral wall blowout of drill bit, thereby easily the flush fluid carries out abundant cooling to the drill bit.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sampling drilling tool can avoid the reduction of the extraction rate of the sampling drilling tool due to too much or too little spraying of the flushing fluid;

2. after the blocking part of the regulating part is inserted into the regulating hole, the blocking part can seal the passage between the regulating hole and the liquid flow hole, and the blocking parts of different regulating parts have different lengths, so that different numbers of liquid flow holes and regulating holes can be sealed by replacing the regulating part, thereby realizing the regulation of the spraying amount of the flushing liquid;

3. after the fixing piece is in threaded connection with the mounting hole, the fixing piece can tightly support the limiting part of the adjusting piece in the mounting hole, and therefore the adjusting piece is fixed.

Drawings

FIG. 1 is a schematic view of the internal structure of a sampling drill in an embodiment of the present application;

figure 2 is a schematic view of the internal structure of the drive joint and nipple in an embodiment of the present application.

Description of reference numerals: 1. a drive joint; 11. a drive section; 111. mounting holes; 12. a first connection portion; 13. a joining section; 14. a second connecting portion; 141. a bearing; 2. an inner joint; 21. a third connecting portion; 22. a fourth connecting portion; 31. an outer tube; 311. a drill bit; 32. an inner tube; 4. a sealing plate; 51. a liquid inlet hole; 52. a liquid flow hole; 53. an adjustment hole; 54. a tube void; 55. a liquid outlet hole; 6. an adjustment member; 61. a limiting part; 62. a blocking section; 7. a fixing member; 71. a counterbore.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a sampling drilling tool with high extraction rate. Referring to fig. 1 and 2, the sampling drill with high extraction rate includes a driving joint 1, an inner joint 2, an outer tube 31, an inner tube 32 and a drill bit 311, wherein the inner joint 2 and the outer tube 31 are both sleeved with the driving joint 1. Specifically, the driving joint 1 includes a driving portion 11, a first connecting portion 12, a joining portion 13, and a second connecting portion 14 that are integrally connected in sequence, the driving portion 11, the first connecting portion 12, the joining portion 13, and the second connecting portion 14 are all generally cylindrical and have decreasing outer diameters, wherein the outer wall of the first connecting portion 12 is in threaded connection with the inner wall of the outer tube 31, so that the outer tube 31 is sleeved with the driving joint 1. In addition, the bearing 141 is sleeved on the second connecting portion 14, the bearing 141 is in interference fit with the second connecting portion 14, the nipple 2 is sleeved outside the bearing 141 of the second connecting portion 14, and the nipple 2 is in interference fit with the bearing 141, so that the nipple 2 is rotatably sleeved on the outer wall of the second connecting portion 14, and the nipple 2 is located in the outer tube 31. Meanwhile, the second connecting portion 14 of the driving structure is interference-fitted with a sealing plate 4, and the sealing plate 4 abuts against the top of the nipple 2 to prevent the washing liquid from entering the nipple 2. Further, the nipple 2 includes a third connecting portion 21 and a fourth connecting portion 22 connected to each other, the outer diameter and the inner diameter of the third connecting portion 21 and the fourth connecting portion 22 are decreased progressively, the nipple 2 is sleeved with the driving nipple 1 through the third connecting portion 21, and the outer wall of the nipple 2 is in threaded connection with the inner wall of the inner tube 32, so that the inner tube 32 is sleeved with the nipple 2. The drill bit 311 is fixedly connected to one end of the outer tube 31 far away from the driving joint 1, when the driving joint 1 rotates, the driving joint 1 drives the outer tube 31 to rotate, the inner tube 32 is kept still, and the outer tube 31 drives the drill bit 311 to rotate, so that single-action double tubes are realized.

A flushing structure is disposed between the driving joint 1 and the drill bit 311, and in this embodiment, two flushing structures are disposed. The flushing structure comprises a liquid inlet hole 51, a plurality of liquid flow holes 52, an adjusting hole 53, a pipe gap 54 and a liquid outlet hole 55, wherein flushing liquid flows through the liquid inlet hole 51, the plurality of liquid flow holes 52 and the adjusting hole 53 in sequence, the liquid inlet hole 51, the plurality of liquid flow holes 52 and the adjusting hole 53 are all arranged in the driving connector 1, the pipe gap 54 is formed between the inner wall of the outer pipe 31 and the outer wall of the inner pipe 32, and the liquid outlet hole 55 is arranged in the drill bit 311. The number of the liquid flowing holes 52 of each flushing structure is three, the three liquid flowing holes 52 of the same flushing structure are arranged at intervals in the vertical direction, the liquid inlet hole 51 and the adjusting hole 53 are both vertically formed, the liquid inlet hole 51 and the adjusting hole 53 are respectively communicated with two sides of the three liquid flowing holes 52 in the same group, and the liquid inlet hole 51 is positioned in the center of the driving joint 1.

The adjusting piece 6 is inserted into the driving joint 1 alternatively, the adjusting piece 6 is used for sealing a channel between the liquid flowing hole 52 and the adjusting hole 53, the driving joint 1 is provided with a fixing piece 7 for fixing the adjusting piece 6, at the moment, when the core pulling sampling is carried out by using the sampling drilling tool, the flushing liquid enters the driving joint 1 through the liquid inlet pipe, the flushing liquid in the driving joint 1 flows into the pipe gap 54 through the liquid flowing hole 52 and the adjusting hole 53 which are communicated, and finally is sprayed out of the drill 311 through the liquid outlet hole 55 to cool the drill 311, when the core pulling sampling is carried out by using a higher rotating speed, the number of the liquid flowing holes 52 communicated with the adjusting hole 53 is increased by replacing the adjusting piece 6, so that the spraying amount of the flushing liquid is increased, when the core pulling sampling is carried out by using a lower rotating speed, the number of the liquid flowing holes 52 communicated with the adjusting hole 53 is reduced by replacing the adjusting piece 6 again, thereby reducing the spraying amount of the washing liquid, and fixing the replaced adjusting member 6 by the fixing member 7, so that the sampling drill can avoid the reduction of the extraction rate of the sampling drill due to too much or too little spraying of the washing liquid.

Mounting hole 111 has been seted up at drive joint 1 top, and mounting hole 111 is the round hole, and regulation hole 53 and the vertical intercommunication of mounting hole 111, and the aperture of mounting hole 111 is greater than the aperture of regulation hole 53. And regulating part 6 has spacing portion 61 and separation portion 62 of interconnect, and the separation portion 62 length inequality of different regulating parts 6, and the spacing portion 61 of regulating part 6 corresponds with the shape of mounting hole 111 for spacing portion 61's outer wall can be laminated with the outer wall of mounting hole 111, and the separation portion 62 of regulating part 6 corresponds with the shape of adjusting hole 53, makes separation portion 62 can be laminated with the inner wall of adjusting hole 53. At this time, the blocking portion 62 of the regulating member 6 is inserted into the regulating hole 53 through the mounting hole 111, the regulating member 6 is limited between the mounting hole 111 and the regulating hole 53 through the limiting portion 61, after the blocking portion 62 of the regulating member 6 is inserted into the regulating hole 53, the blocking portion 62 can seal the passage between the regulating hole 53 and the liquid flow hole 52 through which the blocking portion passes, and since the lengths of the blocking portions 62 of different regulating members 6 are different, the liquid flow holes 52 and the regulating holes 53 of different numbers can be sealed by replacing the regulating member 6, thereby realizing the regulation of the ejection amount of the flushing liquid.

The mounting hole 111 is provided with an internal thread, the fixing piece 7 is in a round cake shape, and the sum of the thickness of the fixing piece 7 and the thickness of the limiting part 61 of the adjusting piece 6 is equal to the depth of the mounting hole 111, so that the top of the fixing piece 7 is flush with the top of the driving joint 1 after the fixing piece 7 is completely placed in the mounting hole 111. Further, the fixing part 7 is provided with an external thread, so that the fixing part 7 can be in threaded connection with the mounting hole 111, and after the fixing part 7 is in threaded connection with the mounting hole 111, the fixing part 7 can abut against the limiting part 61 of the adjusting part 6 in the mounting hole 111, so that the adjusting part 6 is fixed. Furthermore, a counter bore 71 is formed in the top of the fixing member 7, the counter bore 71 is a polygonal hole, and the counter bore 71 is formed to facilitate people to screw the fixing member 7 by using a tool, so that people can conveniently disassemble and assemble the fixing member 7.

The cross-sectional area of regulation hole 53 equals the sum of the cross-sectional area of the three flow hole 52 that is connected with it for when all removing between three flow tube and the regulation pipe and seal, the flush fluid can in time flow through the regulation pipe, and is further, three flow hole 52 of the same group are by feed liquor hole 51 downward sloping to regulation hole 53, makes the flush fluid in the flow hole 52 have the trend of flow direction regulation hole 53, thereby is convenient for the flush fluid in the feed liquor hole 51 to flow into in the regulation hole 53.

A plurality ofly have been seted up out liquid hole 55, and a plurality of liquid holes 55 are seted up around the rotation axis circumference of drill bit 311 for when the flow of flush fluid increases, the flush fluid can in time be through going out liquid hole 55 blowout, avoids the flush fluid to pile up excessively in tub space 54. In addition, the liquid outlet 55 is inclined from the top of the drill 311 to the outer side wall thereof, so that the flushing liquid can be sprayed out from the side wall of the drill 311, and the drill 311 can be sufficiently cooled by the flushing liquid.

The implementation principle of the sampling drilling tool with high extraction rate in the embodiment of the application is as follows: when the core-pulling sampling is carried out by using the sampling drilling tool, flushing liquid enters the driving joint 1 through the liquid inlet pipe, the flushing liquid in the driving joint 1 flows into the space between the pipe gaps 54 through the communicated liquid flow hole 52 and the adjusting hole 53, and finally the flushing liquid is sprayed out of the drilling bit 311 through the liquid outlet hole 55 to cool the drilling bit 311, when core-pulling sampling is required to be carried out at a higher rotating speed, the number of the liquid flow holes 52 communicated with the adjusting holes 53 is increased by replacing the adjusting piece 6, thereby increasing the spraying amount of the flushing liquid, reducing the number of the liquid flow holes 52 communicated with the adjusting holes 53 by replacing the adjusting piece 6 when core pulling sampling is required by using lower rotating speed, thereby reducing the spraying amount of the flushing liquid, and fixing the replaced adjusting member 6 through the fixing member 7, the sampling drilling tool can avoid the reduction of the extraction rate of the sampling drilling tool due to too much or too little spraying of the flushing liquid.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A sampling drilling tool with high extraction rate is characterized in that: the flushing device comprises a driving joint (1), an inner joint (2), an outer pipe (31), an inner pipe (32) and a drill bit (311), wherein the inner joint (2) and the outer pipe (31) are both sleeved with the driving joint (1), the inner joint (2) is positioned in the outer pipe (31), the inner pipe (32) is sleeved with the inner joint (2), the drill bit (311) is connected to one end, far away from the driving joint (1), of the outer pipe (31), and a flushing structure is arranged between the driving joint (1) and the drill bit (311);

the flushing structure comprises a liquid inlet hole (51), a plurality of liquid flow holes (52), an adjusting hole (53), a pipe gap (54) and a liquid outlet hole (55), wherein flushing liquid sequentially flows through the liquid inlet hole (51), the plurality of liquid flow holes (52) and the adjusting hole (53) are all arranged in the driving joint (1), the pipe gap (54) is formed between the inner wall of the outer pipe (31) and the outer wall of the inner pipe (32), and the liquid outlet hole (55) is arranged in the drill bit (311);

multichannel flow liquid hole (52) are along vertical direction interval arrangement, feed liquor hole (51) with the equal vertical setups in regulation hole (53), feed liquor hole (51) with regulation hole (53) communicate respectively in the multichannel the both sides in flow liquid hole (52), just feed liquor hole (51) are located the central point that the drive connects (1) puts, the drive connects (1) in the replacement has inserted regulating part (6), regulating part (6) are used for with flow liquid hole (52) with the passageway between regulation hole (53) is sealed, just drive joint (1) is provided with and carries out fixed mounting (7) to regulating part (6).

2. A high extraction rate sampling drill as claimed in claim 1, wherein: mounting hole (111) have been seted up at drive joint (1) top, regulation hole (53) with the vertical intercommunication of mounting hole (111), the aperture of mounting hole (111) is greater than the aperture of regulation hole (53), regulating part (6) have spacing portion (61) and separation portion (62) of interconnect, the difference regulating part (6) separation portion (62) length inequality, the outer wall of spacing portion (61) can with the outer wall laminating of mounting hole (111), separation portion (62) can with the inner wall laminating of regulation hole (53), separation portion (62) of regulating part (6) insert through mounting hole (111) in regulation hole (53), regulating part (6) through spacing portion (61) spacing in mounting hole (111) with between regulation hole (53).

3. A high extraction rate sampling drill as claimed in claim 2, wherein: the mounting hole (111) is in a circular hole shape, an internal thread is formed in the mounting hole (111), the fixing piece (7) is in a round cake shape, an external thread is formed in the fixing piece (7), and the fixing piece (7) can be in threaded connection with the mounting hole (111).

4. A high extraction rate sampling drill as claimed in claim 3, wherein: the cross-sectional area of the regulating hole (53) is equal to the sum of the cross-sectional areas of the plurality of liquid flow holes (52) connected thereto.

5. A high extraction rate sampling drill as claimed in claim 4, wherein: the liquid outlet holes (55) are formed in a plurality, and the liquid outlet holes (55) are formed in the circumferential direction around the rotating axis of the drill bit (311).

6. A high extraction rate sampling drill as claimed in claim 5, wherein: the liquid flowing hole (52) is inclined downwards to the adjusting hole (53) from the liquid inlet hole (51).

7. A high extraction rate sampling drill as claimed in claim 6, wherein: a counter bore (71) is formed in the top of the fixing piece (7), and the counter bore (71) is a polygonal hole.

8. A high extraction rate sampling drill as claimed in claim 7, wherein: the liquid outlet hole (55) is inclined from the top of the drill bit (311) to the outer side wall thereof.