A concrete core sampler

Abstract

The application provides a concrete core sampler, which comprises a main rod, a first opening at the bottom of the main rod, a second opening at the top end of the main rod, the first opening being larger than the second opening, a first internal thread arranged on the hole wall of the second opening, and a mounting groove at the bottom end of the main rod; a clamping part arranged in the first opening, which comprises a tubular body and a clamping head, and a cover connected to the top end of the tubular body; an auxiliary clamping part, which comprises a mounting ring arranged in the mounting groove and an auxiliary clamping head, and the auxiliary clamping head can extend out of the mounting groove to form a supporting platform; and a handle, which comprises a handle rod and a handle knob, is arranged in the second opening of the main rod, the handle rod is connected to the cover of the clamping part, and a first external thread is arranged on the handle rod; wherein a connecting hole is arranged on the groove wall of the mounting groove, the clamping part and the auxiliary clamping part are hinged through a hinge, and the hinge passes through the connecting hole. In the technical scheme, the structure of the core sampler is simple, one person can operate the core sampler, the clamping is stable, and the core sample can be completely extracted.

Description

Technical Field

[0001] This invention relates to the field of building inspection, and more specifically, to a concrete core sample extractor. Background Technology

[0002] Core drilling is a key method for testing the strength and quality of concrete, but existing core sampling tools have obvious limitations: 1. Core samples are easily damaged: simple tools such as screwdrivers and steel bars can easily damage the integrity of the core sample, affecting the accuracy of the test; 2. Insufficient ability to prevent falling back: the force point of the existing device is concentrated on the upper part of the core sample, and the core sample is prone to falling back to the bottom of the hole due to loosening during extraction. Summary of the Invention

[0003] The present invention aims to provide a concrete core sample extractor to solve the problems of easy damage and fallback of core samples during extraction in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a concrete core sample extractor is provided, comprising: a hollow main rod, a first opening at the bottom of the main rod, and a second opening from the first opening to the top of the main rod, wherein the diameter of the first opening is larger than the diameter of the second opening, a first internal thread is provided on a portion of the wall of the second opening, and an axially extending mounting groove is formed between the inner and outer walls of the bottom end of the first rod; and a clamping part disposed within the first opening of the main rod, comprising a tubular body and a clamping head disposed at the bottom end of the tubular body. The top of the main body is connected to a cap; the auxiliary clamping part includes a mounting ring disposed in the mounting groove and an auxiliary clamping head connected to the mounting ring, the auxiliary clamping head can extend out of the mounting groove and form a support platform with the bottom end of the main rod; the handle includes a handle rod and a handle disposed on the handle rod, the handle rod passes through the second opening of the main rod and is connected to the cap of the clamping part, the handle rod is provided with a first external thread adapted to the first internal thread; wherein the mounting groove wall is provided with a connecting hole, the clamping part and the auxiliary clamping part are hinged by a chain, and the hinge passes through the connecting hole.

[0005] Furthermore, the clamping head includes a plurality of first lobes, which are evenly distributed along the cross-sectional center of the tubular body. The outer surface of the first lobes is arc-shaped. The plurality of first lobes contract and close within the main rod, and the first lobes expand radially outward when extending out of the main rod.

[0006] Furthermore, a roller is provided at the connection hole, the chain is laid on the roller, and one end of the chain is connected to the mounting ring.

[0007] Furthermore, it also includes a secondary rod, which is hollow, with a second external thread at the top of the main rod and a second internal thread at the bottom of the secondary rod that mates with the second external thread.

[0008] Furthermore, the handle is a telescopic rod, and when the secondary rod is connected to the main rod, the handle passes through the main rod and the secondary rod.

[0009] Furthermore, friction points are provided on the inner surface of the first petal and on the inner wall of the tubular body, and the distribution density of friction points on the inner wall of the tubular body gradually decreases from the bottom upwards.

[0010] Furthermore, a first torsion spring is provided at the mounting end of the first petal, and a second torsion spring is provided at the mounting end of the second petal.

[0011] Furthermore, the auxiliary clamping head comprises multiple second lobes, the outer surface of which is arc-shaped and the free end of which is spherical.

[0012] In the technical solution of the present invention, the core sample extractor has a simple structure, can be operated by a single person and is stable in clamping, and can make the core sample extraction complete. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0014] Figure 1 A schematic diagram of a concrete core sample extractor according to the present invention is shown; and

[0015] Figure 2 It shows Figure 1 A schematic diagram of the appearance of a concrete core sample extractor. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] See appendix for details. Figure 1 and Figure 2The concrete core sample extractor of this embodiment includes: a main rod 10, which is hollow, with a first opening 11 at the bottom and a second opening 12 from the first opening 11 to the top of the main rod 10. The diameter of the first opening 11 is larger than the diameter of the second opening 12. A first internal thread is provided on part of the wall of the second opening 12. An axially deep mounting groove is formed between the inner and outer walls at the bottom of the main rod 10. A clamping part is disposed in the first opening 11 of the main rod 10, including a tubular body 21 and a clamping head disposed at the bottom of the tubular body 21. The top of the tubular body 21 is connected to... The main rod 10 is equipped with a cover 23; an auxiliary clamping part, including a mounting ring 31 disposed in the mounting groove and multiple auxiliary clamping heads connected to the mounting ring 31, the multiple auxiliary clamping heads can extend out of the mounting groove and support the bottom end of the main rod 10; a handle 40, including a handle rod and a handle disposed on the handle rod, the handle rod passing through the second opening 12 of the main rod 10 and the handle rod being connected to the cover 23 of the clamping part, the handle rod being provided with a first external thread adapted to the first internal thread; wherein the mounting groove wall is provided with a connecting hole, the clamping part and the auxiliary clamping part are hinged by a chain 33, the hinge passing through the connecting hole.

[0018] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: simple structure, can be operated by a single person and is stable in clamping, and can make the core sample extraction complete.

[0019] Preferably, the clamping head in this embodiment includes a plurality of first petals 22, preferably four. The outer surface of the first petals 22 is arc-shaped, and the inner surface of the first petals 22 has a plane that contacts the core sample. The plurality of first petals 22 are evenly distributed along the center of the cross-section of the tubular body 21. The mounting end of the first petal 22 is mounted on a mounting shaft provided in a clearance notch at the bottom of the tubular body 21, so that the first petal 22 can rotate around the mounting shaft. At the same time, a first torsion spring is also provided between the first petal 22 and the mounting shaft. The first torsion spring causes the first petal 22 to maintain the tendency of its free end to expand radially outward, so that the first petal 22 moves radially after extending into the tubular body 21, thereby opening the clamping head. When the first petal 22 retracts into the first opening 11 of the main rod 10, the bottom ends of the plurality of first petals 22 contract towards the center to form a clamp by the limiting effect of the inner wall of the first opening 11. To reduce the likelihood of core sample loss during sampling, friction points are provided on the inner side of the first petal 22 and on the inner wall of the tubular body 21 at locations that avoid the first petal 22. Preferably, the density of friction points on the inner wall of the tubular body 21 gradually decreases in the axial direction from bottom to top.

[0020] Preferably, the auxiliary clamping part provided in the mounting groove includes a mounting ring 31 and an auxiliary clamping head rotatably sleeved on the mounting ring 31. The auxiliary clamping head is a plurality of second lobes 32, preferably eight. Preferably, the outer surface of the second lobes 32 is arc-shaped, and the free end of the second lobes 32 is spherical. A second torsion spring is also provided between the mounting ends of the plurality of second lobes 32 and the mounting ring 31. Under the action of the second torsion spring, the free end of the second lobes 32 maintains a radially inward contraction tendency. A plurality of connecting holes are provided on the side wall of the mounting groove near the tubular body 21. The plurality of connecting holes are on the same plane, which is located between the highest point of the cap 23 and the first internal thread. Each connecting hole is equipped with a rotating shaft. One end of multiple chains 33 is connected to the mounting ring 31, and the other end passes through the connecting hole and is connected to the cover 23. This arrangement makes the movement directions of the clamping part and the auxiliary clamping part opposite. When the clamping part extends out of the main rod 10, the auxiliary clamping part retracts into the mounting groove. When the clamping part holds the core sample and retracts into the main rod 10, the auxiliary clamping part extends out of the mounting groove, and the free end of the ball begins to contact the core sample and assist in clamping the core sample. When the clamping part continues to drive the core sample upward, the auxiliary clamping part will continue to move downward until it detaches from the core sample. At this time, the free end of the second petal 32 of the auxiliary clamping part closes at the axis, forming a support platform to prevent the core sample from falling.

[0021] Preferably, the free ends of the plurality of first lobes 22 and the free ends of the plurality of second lobes 32 are all located in the same horizontal plane, and this horizontal plane is slightly higher than the horizontal plane where the bottom end of the main rod 10 is located. This facilitates the daily storage of the core sample extractor of this embodiment.

[0022] To extract core samples from deep depths, the core sample extractor of this embodiment also includes a secondary rod 50. The main rod 10 and the secondary rod 50 are connected by threads. In this embodiment, the end where the main rod 10 and the secondary rod 50 are connected is provided with a second external thread, and the connecting end of the secondary rod 50 is provided with a matching second internal thread. The secondary rod 50 is also hollow to accommodate the handle 40. To accommodate the secondary rod 50, the handle 40 can have a telescopic structure, so that the overall length of the handle 40 can be extended when the secondary rod 50 is fitted.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A concrete core sample extractor, characterized in that, include: The main rod (10) is hollow. The bottom of the main rod (10) is provided with a first opening (11) and a second opening (12) from the first opening (11) to the top of the main rod (10). The diameter of the first opening (11) is larger than the diameter of the second opening (12). A first internal thread is provided on part of the hole wall of the second opening (12). An axially deep mounting groove is provided between the inner and outer walls of the bottom end of the main rod (10). The clamping part is provided in the first opening (11) of the main rod (10), including a tubular body (21) and a clamping head provided at the bottom end of the tubular body (21), and a cap (23) is connected to the top end of the tubular body (21). The auxiliary clamping part includes a mounting ring (31) disposed in the mounting groove and an auxiliary clamping head connected to the mounting ring (31). The auxiliary clamping head can extend out of the mounting groove and form a support platform with the bottom end of the main rod (10). The handle (40) includes a handle and a grip provided on the handle. The handle passes through the second opening (12) of the main rod (10) and is connected to the cover (23) of the clamping part. The handle is provided with a first external thread that is adapted to the first internal thread. The mounting groove has a connecting hole on its groove wall, and the clamping part and the auxiliary clamping part are hinged by a chain (33), which passes through the connecting hole.

2. The concrete core sample extractor according to claim 1, characterized in that, The clamping head includes a plurality of first lobes (22), which are evenly distributed along the cross-sectional center of the tubular body (21). The outer surface of the first lobes (22) is arc-shaped. The plurality of first lobes (22) contract and close within the main rod (10). When the first lobes (22) extend outward radially from the main rod (10), they are closed.

3. The concrete core sample extractor according to claim 1, characterized in that, A roller is provided at the connection hole, the chain (33) is placed on the roller, and one end of the chain (33) is connected to the mounting ring (31).

4. The concrete core sample extractor according to claim 1, characterized in that, It also includes a secondary rod (50), which is hollow. The top end of the main rod (10) is provided with a second external thread, and the bottom end of the secondary rod (50) is provided with a second internal thread that mates with the second external thread.

5. The concrete core sample extractor according to claim 4, characterized in that, The handle is a telescopic rod. When the auxiliary rod (50) is connected to the main rod (10), the handle passes through the main rod (10) and the auxiliary rod (50).

6. The concrete core sample extractor according to claim 2, characterized in that, Friction points are provided on the inner side of the first petal (22), and friction points are provided on the inner wall of the tubular body (21). The distribution density of friction points on the inner wall of the tubular body (21) gradually decreases from the bottom upwards.

7. The concrete core sample extractor according to claim 2, characterized in that, The first petal (22) is provided with a first torsion spring at its mounting end, and the second petal (32) is provided with a second torsion spring at its mounting end.

8. The concrete core sample extractor according to claim 1, characterized in that, The auxiliary clamping head consists of multiple second lobes (32), the outer surface of which is arc-shaped and the free end of which is spherical.

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