Core drilling and sampling device for foundation pile detection

Abstract

The invention discloses a core drilling and sampling device for foundation pile detection, and relates to the technical field of core drilling and sampling. The device comprises an outer drill rod and a mounting sleeve, the outer drill rod is mounted on an output shaft of a rotary driving source, the mounting sleeve is mounted on a shell of the rotary driving source, a hinge cavity is formed in the outer drill rod, an inner drill rod is arranged in the outer drill rod, and multiple sets of sliding holes are formed in the inner wall of the outer drill rod in a penetrating mode; a lifting pin is slidably connected into the sliding hole and abuts against the inner drill rod, an outer sleeve capable of ascending and descending is arranged at the bottom of the mounting sleeve, an inner ring groove is formed in the inner wall of the outer sleeve, and an abutting block is arranged in the inner ring groove. The inclined prying force is given to the concrete core through the inner drill rod, concrete is assisted to fall off, and the fallen concrete core is inclined relative to the outer drill rod, so that when the outer drill rod is taken out of a drill hole, the concrete core can be taken out, no extra coring tool is needed, the coring efficiency is high, and the overall structure of a sample is complete.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of core drilling sampling, in particular to a foundation pile detection core drilling sampling device. BACKGROUND

[0002] Core drilling sampling is a method of obtaining continuous columnar samples of underground soil or rock through drilling technology, which can reflect the characteristics of soil or rock at different depths and is widely used in geological exploration, environmental monitoring, soil analysis, geotechnical engineering and other fields. Through core drilling sampling of foundation piles, the actual physical and mechanical properties of concrete or rock can be obtained to judge the construction quality of foundation piles, soil characteristics and bearing capacity.

[0003] In the utility model patent (publication number: CN218973865U), a concrete core drilling sampling device is disclosed, which comprises a base and a core drilling part. The base is fixedly installed with a stand column, the upper end of the stand column is rotatably installed with a rack, the rack is slidably installed with a sleeve, the core drilling part is fixedly arranged on the side of the sleeve, the upper end of the rack is rotatably installed with a locking arm, the base is provided with a first locking part and a second locking part, the first locking part is used for fixing the rack, and the second locking part is used for fixing the locking arm. The patent and the prior art need to use special tools (such as sampling pipes and core drilling samplers) to extract concrete samples after the drilling of the foundation pile concrete sampling is completed, and when the core is taken, the concrete core does not fall off smoothly or is stuck in the hole, and a crowbar needs to be used to gently pry out the core sample, which not only leads to a complex core taking process, but also easily causes damage to the concrete core, especially when the sample is used for detection, the complete core sample is crucial to the test result. SUMMARY

[0004] The purpose of the present application is to solve the above-mentioned problems, and the present application provides a foundation pile detection core drilling sampling device.

[0005] In order to achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] A foundation pile detection core drilling sampling device, comprising an outer drill rod and a mounting sleeve, the outer drill rod is installed on the output shaft of a rotary drive source, the mounting sleeve is installed on the shell of the rotary drive source, a hinge cavity is formed in the inner part of the outer drill rod, an inner drill rod is arranged in the inner part of the outer drill rod, a hinge part is arranged at the bottom of the inner drill rod and is hinged in the hinge cavity, a swing cavity is arranged between the inner drill rod and the inner wall of the outer drill rod, a through gap is arranged between the inner top of the inner drill rod and the outer drill rod, and the swing cavity and the through gap are connected in communication.

[0007] The inner wall of the outer drill rod is provided with a plurality of groups of sliding holes in a ring shape, the inside of the sliding hole is slidably connected with a jack pin, a jack spring is arranged between the jack pin and the outer drill rod, the jack pin is pressed on the inner drill rod, the bottom of the mounting sleeve is provided with a liftable outer sleeve, the outer sleeve is sleeved on the outer side of the outer drill rod, the inner wall of the outer sleeve is provided with an inner ring groove, the inside of the inner ring groove is provided with a pressing block, and the jack pin can be inserted into the inner ring groove.

[0008] Further, the bottom of the outer drill rod is threadedly connected with a detachable drill bit.

[0009] Further, the top of the outer drill rod is threadedly connected with a connecting top disc, the top of the connecting top disc is provided with a connecting barrel connected with the output shaft of the rotary driving source, the inside of the connecting top disc is provided with a water injection hole in communication with an external water pump.

[0010] Further, the top of the inner drill rod is provided with a rotating part, and a filter screen is arranged between the rotating part and the connecting top disc.

[0011] Further, the inner wall of the swing cavity is provided with a plurality of groups of spray holes in a ring shape, and the spray holes are located above the hinged cavity.

[0012] Further, the outer side of the outer drill rod is provided with a dial ring located above the sliding hole, and a plurality of elastic protrusions are annularly arranged on the outer side of the dial ring and can extrude the pressing block.

[0013] Further, the end of the jack pin away from the outer drill rod is designed in a circular arc.

[0014] Further, the outer side of the mounting sleeve is threadedly connected with an adjusting nut, the bottom of the mounting sleeve is provided with a guide hole, the top of the outer sleeve is fixedly provided with four guide columns, the four guide columns pass through the guide hole, the top of the four guide columns is fixedly connected with a rotating ring, and the rotating ring is rotatably installed at the bottom of the adjusting nut.

[0015] Further, the top of the mounting sleeve is provided with a connecting flange.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The present application limits the inner drill rod by a plurality of jack pins, so that the inner drill rod remains coaxial with the outer drill rod during the drilling process. After the drilling is completed, the outer sleeve is controlled to descend relative to the outer drill rod, the inner ring groove descends to the position of the jack pin, the outer drill rod is controlled to rotate, and the jack pins in each direction are sequentially pushed by the pressing block. The inner drill rod applies a prying force to the concrete core, assisting the concrete to fall off. The fallen concrete core is inclined relative to the outer drill rod, so that the outer drill rod can take out the concrete core when it is taken out of the drill hole. Therefore, the core taking step is simple, the core taking efficiency is high, and the overall structure of the sample is complete.

[0018] 2. The present invention provides a swing cavity and a through spacing between the outer drill rod and the inner drill rod. When drilling and coring, more water can flow in the outer drill rod, which has a better cooling effect, can lower the temperature of the drill bit, reduce friction, extend the service life of the drill bit, and improve working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic cross-sectional structural diagram of the present invention;

[0021] Figure 3 It is an exploded view of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the outer drill rod of the present invention;

[0023] Figure 5 This invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0024] Figure 6 This is a schematic diagram of the inner drill rod structure of the present invention;

[0025] Figure 7 It is a schematic structural diagram of the outer sleeve of the present invention.

[0026] Figure numerals: 1. outer drill rod; 11. hinge chamber; 12. spray hole; 13. sliding hole; 14. ejector pin; 15. ejector spring; 16. dial ring; 17. connecting top plate; 18. connecting cylinder; 2. inner drill rod; 21. hinge part; 22. filter screen; 3. detachable drill bit; 4. mounting sleeve; 5. adjusting nut; 6. outer sleeve; 61. guide column; 62. swivel; 63. inner ring groove; 64. top pressure block. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] Example 1, as Figures 1-7 As shown, a foundation pile inspection core sampling device includes an outer drill rod 1 and a mounting sleeve 4. The outer drill rod 1 is mounted on the output shaft of a rotary drive source, and the mounting sleeve 4 is mounted on the outer housing of the rotary drive source. A hinge cavity 11 is defined within the outer drill rod 1. An inner drill rod 2 is disposed within the outer drill rod 1. A hinge portion 21 is disposed at the bottom of the inner drill rod 2. The hinge portion 21 is spherical and hinged in the hinge cavity 11. A swing cavity is disposed between the inner drill rod 2 and the inner wall of the outer drill rod 1. A through gap is disposed between the inner drill rod 2 and the inner top of the outer drill rod 1. The swing cavity is connected to the through gap.

[0029] The inner wall of the outer drill rod 1 is provided with a plurality of groups of sliding holes 13, which are annularly distributed, and in this embodiment, ten groups of sliding holes 13 are provided. The inner part of the sliding hole 13 is slidably connected with a jacking pin 14, and the jacking pin 14 is provided with a jacking spring 15 between the jacking pin 14 and the outer drill rod 1. The jacking pin 14 is pressed on the inner drill rod 2. The bottom of the mounting sleeve 4 is provided with a liftable outer sleeve 6, which is sleeved on the outer side of the outer drill rod 1. The inner wall of the outer sleeve 6 is provided with an inner ring groove 63, and the inner part of the inner ring groove 63 is provided with a jacking block 64. The jacking pin 14 can be inserted into the inner ring groove 63.

[0030] Drilling core: At this time, the jacking pin 14 is pressed on the inner wall of the outer sleeve 6, and a plurality of jacking pins 14 press the inner drill rod 2 at the same time, so as to limit the inner drill rod 2, so that the axis of the inner drill rod 2 coincides with the axis of the outer drill rod 1. At this time, the rotary drive source drives the outer drill rod 1 to rotate, and the outer drill rod 1 descends to drill a hole. The concrete core enters the inner drill rod 2. When the outer drill rod 1 descends to the appropriate depth, the drilling of the core is stopped. In the process of drilling the core, cooling water enters the outer drill rod 1 and simultaneously enters the inner drill rod 2 and the swing cavity. Through the arrangement of the swing cavity, the amount of cooling water in the outer drill rod 1 is much larger than that in the existing drilling tool, which can more efficiently cool down, reduce the temperature of the drill bit, reduce friction, prolong the service life of the drill bit, and improve the operation efficiency.

[0031] Core taking: Control the outer sleeve 6 to descend, and the outer sleeve 6 makes the inner ring groove 63 descend to the position of the jacking pin 14. Under the action of the jacking spring 15, the jacking pin 14 is inserted into the inner ring groove 63, and the jacking pin 14 is away from the inner drill rod 2. The inner drill rod 2 can swing. It should be noted that when the outer sleeve 6 descends, the jacking block 64 is located between the two jacking pins 14, and the jacking block 64 can smoothly descend to the same horizontal plane as the jacking pin 14. At this time, continue to control the outer drill rod 1 to rotate, and the outer drill rod 1 drives the jacking pin 14 to rotate relative to the outer sleeve 6. When the jacking pin 14 rotates to the jacking block 64, the jacking block 64 pushes the jacking pin 14 to press on the inner drill rod 2 again, and the pushing depth is greater than the initial pushing depth of the jacking pin 14. The jacking pin 14 gives the inner drill rod 2 an oblique thrust force, and the other jacking pins 14 are located in the inner ring groove 63 and do not give the inner drill rod 2 a limiting force. Therefore, the inner drill rod 2 can be inclined in the outer drill rod 1 to assist the concrete core to separate, and after the concrete core is inclined in the outer drill rod 1, it will not fall off from the outer drill rod 1. When the outer drill rod 1 is taken out of the hole, the concrete core can be directly taken out without the need for additional core taking tools. The core taking is simple. After the core is taken, control the outer drill rod 1 to rotate so that the jacking pin 14 is away from the jacking block 64, and then control the outer sleeve 6 to ascend relative to the outer drill rod 1. The jacking pin 14 is separated from the inner ring groove 63, the jacking pin 14 is pressed on the inner wall of the outer sleeve 6, and the inner drill rod 2 is upright again. At this time, the concrete core can be easily taken out of the tool, and the structure of the concrete core is complete.

[0032] In the embodiment two, on the basis of the above embodiment, the bottom of the outer drill rod 1 is threadedly connected with the detachable drill bit 3, the inner diameter of the detachable drill bit 3 is same with the inner diameter of the inner drill rod 2, which is convenient for coping with different working conditions.

[0033] In the embodiment three, on the basis of the above embodiment, the top of the outer drill rod 1 is threadedly connected with the connecting top disc 17, the top of the connecting top disc 17 is provided with the connecting barrel 18 which is connected with the output shaft of the rotary driving source, and the inside of the connecting top disc 17 is provided with the water injection hole which is communicated with the external water pump.

[0034] Through the setting of the connecting top disc 17, the inner drill rod 2 is conveniently installed in the outer drill rod 1.

[0035] In the embodiment four, on the basis of the above embodiment, the top of the inner drill rod 2 is provided with the rotating part, and the filter screen 22 is arranged between the rotating part and the connecting top disc 17.

[0036] Further, the inner wall of the swing cavity is provided with a plurality of groups of spray holes 12 which are annularly distributed and located above the hinged cavity 11.

[0037] Through the setting of the filter screen 22, the large-particle gravel can be prevented from entering the swing cavity, and the water in the swing cavity is sprayed out through the spray holes 12, so that the water in the swing cavity flows and can be directly washed at the drilling position of the detachable drill bit 3, and the cooling effect is better.

[0038] In the embodiment five, on the basis of the above embodiment, the outer side of the outer drill rod 1 is provided with the push ring 16 which is located above the sliding hole 13, and the outer side of the push ring 16 is annularly provided with a plurality of elastic protrusions which can extrude the top pressing block 64, and ten groups of elastic protrusions are arranged in the embodiment and correspond to the top pin 14.

[0039] Further, the end of the top pin 14 away from the outer drill rod 1 is designed as a circular arc, so that when the outer sleeve 6 rises, the top pin 14 can smoothly separate from the inner ring groove 63.

[0040] When the core is drilled, the top pressing block 64 corresponds to the position of the push ring 16, so that in the core drilling process, the top pressing block 64 can repeatedly knock on the elastic protrusions, so that the outer drill rod 1 generates micro-vibration, and through the micro-vibration, the concrete particles are better kept in place under the vibration, so as to avoid the distortion of the sample caused by the drilling disturbance, thereby improving the accuracy of the judgment on the concrete segregation condition, and when the top pressing block 64 extrudes the elastic protrusion, the elastic protrusion can be used, so as not to affect the rotation of the outer drill rod 1.

[0041] In the above embodiment, the outer side of the mounting sleeve 4 is threadedly connected with an adjusting nut 5, the bottom of the mounting sleeve 4 is provided with a guide hole, the top of the outer sleeve 6 is fixedly provided with four guide columns 61, the four guide columns 61 penetrate through the guide hole, the top of the four guide columns 61 is fixedly connected with a rotating ring 62, and the rotating ring 62 is rotatably arranged at the bottom of the adjusting nut 5.

[0042] Further, the top of the mounting sleeve 4 is provided with a connecting flange.

[0043] By rotating the adjusting nut 5, the adjusting nut 5 drives the rotating ring 62 to ascend and descend, the rotating ring 62 ascends and descends through the guide column 61, and the guide column 61 drives the outer sleeve 6 to ascend and descend, so that the control is simple and stable, and the outer sleeve 6 cannot rotate.

[0044] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pile testing core sampling device comprising an outer drill rod (1) and a mounting sleeve (4), characterized in that, The outer drill rod (1) is installed on the output shaft of the rotary driving source, the mounting sleeve (4) is installed on the shell of the rotary driving source, the inner wall of the outer drill rod (1) is provided with a hinged cavity (11), the inner drill rod (2) is arranged in the outer drill rod (1), the bottom of the inner drill rod (2) is provided with a hinged part (21), the hinged part (21) is hinged in the hinged cavity (11), the inner drill rod (2) and the inner wall of the outer drill rod (1) are provided with a swing cavity, the inner drill rod (2) and the inner top of the outer drill rod (1) are provided with a through distance, and the swing cavity and the through distance are communicated. The inner wall of the outer drill rod (1) is provided with a plurality of slide holes (13), the plurality of slide holes (13) are annularly distributed, the inner wall of the slide hole (13) is slidably connected with a jack pin (14), the jack pin (14) and the outer drill rod (1) are provided with a jack spring (15), the jack pin (14) is pressed on the inner drill rod (2), the bottom of the mounting sleeve (4) is provided with a liftable outer sleeve (6), the outer sleeve (6) is sleeved on the outer side of the outer drill rod (1), the inner wall of the outer sleeve (6) is provided with an inner ring groove (63), the inner ring groove (63) is provided with a pressing block (64), and the jack pin (14) can be inserted into the inner ring groove (63).

2. A drilled core sampling device for pile testing according to claim 1, wherein, The bottom of the outer drill rod (1) is threadedly connected with a detachable drill bit (3).

3. A drilled core sampling device for pile testing as defined in claim 1, wherein The top of the outer drill rod (1) is threadedly connected with a connecting top disc (17), the top of the connecting top disc (17) is provided with a connecting barrel (18), the connecting barrel (18) is connected with the output shaft of the rotary driving source, the inner wall of the connecting top disc (17) is provided with a water injection hole, and the water injection hole is communicated with the water pump outside.

4. A drilled core sampling device for pile testing as claimed in claim 3, wherein, The top of the inner drill rod (2) is provided with a rotating part, and the rotating part is provided with a filter screen (22) between the connecting top disc (17).

5. A drilled core sampling device for pile testing as claimed in claim 4, wherein, The inner wall of the swing cavity is provided with a plurality of spray holes (12), the plurality of spray holes (12) are annularly distributed, and the spray holes (12) are located above the hinged cavity (11).

6. A drilled core sampling device for pile testing as defined in claim 1, wherein, The outer side of the outer drill rod (1) is provided with a dial ring (16), the dial ring (16) is located above the slide hole (13), and the outer side of the dial ring (16) is annularly provided with a plurality of elastic protrusions which can extrude the pressing block (64).

7. A drilled core sampling device for pile testing as defined in claim 1 wherein, The end of the jack pin (14) away from the outer drill rod (1) is designed as a circular arc.

8. A drilled core sampling device for pile testing as defined in claim 1 wherein, The outer side of the mounting sleeve (4) is threadedly connected with an adjusting nut (5), the bottom of the mounting sleeve (4) is provided with a guide hole, the top of the outer sleeve (6) is fixedly installed with four guide columns (61), the four guide columns (61) penetrate through the guide hole, the top of the four guide columns (61) is fixedly connected with a rotating ring (62), and the rotating ring (62) is rotatably installed at the bottom of the adjusting nut (5).

9. A drilled core sampling device for pile testing as claimed in claim 8, wherein, The top of the mounting sleeve (4) is provided with a connecting flange.

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