CN112213143A - Concrete core sample clamping device - Google Patents
Concrete core sample clamping device Download PDFInfo
- Publication number
- CN112213143A CN112213143A CN201910612965.9A CN201910612965A CN112213143A CN 112213143 A CN112213143 A CN 112213143A CN 201910612965 A CN201910612965 A CN 201910612965A CN 112213143 A CN112213143 A CN 112213143A
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- arc
- core sample
- shaped
- hinge member
- gripper
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
- G01N2001/085—Grabs
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of nondestructive testing, and discloses a concrete core sample clamping device which comprises at least two arc-shaped grippers arranged on the circumference at uniform intervals, wherein two ends of each arc-shaped gripper are respectively a connecting end and a core sample clamping end, and the inner wall of each connecting end is provided with an upper hinging part and a lower hinging part which are corresponding to each other in the vertical position at intervals along the length direction of each arc-shaped gripper; the upper hinge component is hinged with the upper hinge parts of the arc-shaped grippers, the connecting pieces are hinged with the lower hinge parts in a one-to-one correspondence mode, and the lower hinge components are hinged with the connecting pieces.
Description
Technical Field
The invention belongs to the technical field of nondestructive testing of engineering structures, and particularly relates to a concrete core sample clamping device.
Background
The core drilling method for concrete is a micro-damage on-site detection method, and a special drilling machine is used for drilling a core sample from structural concrete so as to detect the strength of the concrete or observe the internal quality of the concrete. There are some clamping devices for clamping concrete core samples, such as a cylindrical concrete core sample clamping device disclosed in patent application No. CN208109462U, which has two clamping pieces capable of extending into a gap between the concrete core sample and a concrete foundation, and the two clamping pieces clamp the concrete core sample to be taken out by pressing and holding a first operating handle and a second operating handle with hands. Although the technical solution of the patent application can achieve the purpose of taking out the core sample, it still has certain limitations, one of which is: the two clamping pieces can only be tightened and cannot be properly opened, and aiming at a core sample with the diameter being as much as the diameter of the circumference formed by the two clamping pieces, the two clamping pieces cannot smoothly extend into the periphery of the core sample to be clamped; the second step is as follows: the radian of the two clamping pieces is 90-degree span, the wrapping degree of the two clamping pieces to the core sample after being tightened is not enough, and the risk that the core sample falls off or is crushed and damaged easily occurs; thirdly, the clamping force of the clamping piece on the core sample is totally dependent on the pressing force of an operator on the two operating handles, and the one-time taking-out efficiency of the core sample cannot be ensured.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the concrete core sample clamping device which is labor-saving, good in fitting degree with a core sample and stable in clamping.
The technical scheme of the invention is as follows: a concrete core sample clamping device comprises at least two arc-shaped grippers which are uniformly arranged on the circumference and have intervals, wherein one end of each arc-shaped gripper is a connecting end, the other end of each arc-shaped gripper is a core sample clamping end, and the inner wall of the connecting end of each arc-shaped gripper is provided with an upper hinge part and a lower hinge part which correspond to each other in the vertical position at intervals along the length direction of each arc-shaped gripper; the device also comprises an upper hinged member which is hinged with the upper hinged parts of the plurality of arc-shaped grippers, a plurality of connecting pieces which are hinged with the lower hinged parts in a one-to-one correspondence manner, and a lower hinged member which is hinged with the other end parts of the plurality of connecting pieces, the centers of the upper hinged member and the lower hinged member are aligned, the center positions of the upper hinged member and the lower hinged member are respectively provided with a center hole, the center holes of the upper hinged member are through holes, lower compression rods are arranged in the center holes of the upper hinged member and the lower hinged member, the end parts of the lower compression rods, which are deviated from the lower hinged member, are extension ends extending out of the surface of the upper hinged member, upper compression rods used for controlling the; the lower hinge member is located between the lower hinge portion and the upper hinge member as viewed in the axial direction of the lower pressure lever.
The further technical scheme of the invention is as follows: the number of the arc-shaped grippers is four.
The further technical scheme of the invention is as follows: the distance between the arc-shaped grippers is 8-10 mm.
The further technical scheme of the invention is as follows: the core appearance of circular-arc tongs snatchs the end inner wall and is equipped with anti-skidding structure.
The further technical scheme of the invention is as follows: the anti-slip structure is a sawtooth structure, and the sawtooth tips of the sawtooth structure face the direction of the connecting end.
The further technical scheme of the invention is as follows: the center hole of the lower hinge component is a threaded hole, and the lower pressing rod is in threaded connection with the lower hinge component.
The further technical scheme of the invention is as follows: the extension end of the lower pressure rod is provided with external threads, and the upper pressure rod is in threaded connection with the extension end of the lower pressure rod.
The invention further adopts the technical scheme that: the upper pressure lever comprises a plurality of sub upper pressure levers, and the adjacent sub upper pressure levers are in head-to-tail threaded connection.
Compared with the prior art, the invention has the following characteristics:
1) the distance between the adjacent arc-shaped grippers is small, the core sample is well attached to the grippers when being gripped, the core sample is not easy to eccentrically slip, the gripping is stable and powerful, the gripping efficiency is high, and the use is convenient;
2) the transfer device is formed by hinging a plurality of parts, and the vertical force and the displacement applied to the upper pressure rod can be decomposed and combined for the second time by utilizing the relation between the force and the displacement, so that the effects of saving labor and efficiently clamping the core sample by using the ingenious force are achieved;
3) according to different core sample diameters, the expansibility is good, the structure is simple, and the maintenance is convenient.
The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
FIG. 1 is a front view of a concrete core sampler according to example 1;
FIG. 2 is a top view of the four arcuate fingers of FIG. 1;
FIG. 3 is a front view (showing the inner surface) of a single arcuate hand grip;
FIG. 4 is a partial enlarged view of a saw-toothed structure of a gripping end of the arc-shaped gripper core sample;
FIG. 5 is a front view of the upper hinge member;
FIG. 6 is a top view of the upper hinge member;
FIG. 7 is a front view of the lower hinge member;
FIG. 8 is a top view of the lower hinge member;
FIG. 9 is a front view of the connector;
FIG. 10 is a top view of the connector;
figure 11 is a front view of a hinged connection.
Detailed Description
Example 1
As shown in fig. 1, a concrete core sample clamping device is provided, which is mainly used for clamping a deep-hole concrete core sample after a concrete drill core in an engineering structure is completed, and comprises at least two arc-shaped grippers 1 (see fig. 2-4 in detail) which are uniformly arranged on the circumference and have intervals, wherein one end of each arc-shaped gripper is a connecting end, and the other end of each arc-shaped gripper is a core sample clamping end, and an upper hinge part 11 and a lower hinge part 12 which correspond to each other in the up-down position are arranged on the inner wall of the connecting end along the length direction of each arc-shaped gripper 1 at intervals; the device also comprises an upper hinged member 2 which is hinged with the upper hinged parts 11 of the plurality of arc-shaped grippers simultaneously, a plurality of connecting pieces 3 which are hinged with the lower hinged parts 12 in a one-to-one correspondence manner, and a lower hinged member 4 which is hinged with the other end parts of the plurality of connecting pieces 3 simultaneously, wherein the centers of the upper hinged member 2 and the lower hinged member 4 are aligned and the center positions of the upper hinged member 2 and the lower hinged member 4 are both provided with center holes, the center hole of the upper hinged member is a through hole, the center hole of the lower hinged member can be a through hole, a lower pressure rod 5 is arranged in the center holes of the upper hinged member 2 and the lower hinged member 4, the end part of the lower pressure rod 5 departing from the lower hinged member is an extending end extending out of the surface of the upper hinged member, an upper pressure rod 6 used; the lower hinge member 4 is located between the lower hinge portion 12 and the upper hinge member 2 as viewed in the axial direction of the lower pressure lever.
Specifically, the concrete core sample clamping device of the embodiment mainly utilizes the hinged transmission devices formed by all the parts, applies vertical downward pressure or vertical upward lifting force to the upper pressure rod, and can perform secondary decomposition and combination on the applied vertical force and displacement by utilizing the relationship between the force and the displacement, so that the core sample can be smoothly clamped.
The upper hinged member 2 is equivalent to a clamping diameter control member, the upper pressure rod 6 is pressed downwards to slightly open the clamping tail end of each arc-shaped gripper 1, so that each arc-shaped gripper is increased on the basis of the originally formed circumferential diameter, when the upper pressure rod 6 is lifted upwards, the clamping tail end of each arc-shaped gripper 1 can be automatically tightened, the concrete core sample clamping device can be adaptively adjusted according to the actual diameter of a core sample, and the connecting piece plays a role of a key transmission member to assist in smoothly transmitting the downward pressure and the upward pressure of the upper pressure rod to the arc-shaped gripper.
The upper hinge part and the lower hinge part on the arc-shaped hand grip are both two hinge plates which are arranged in parallel and are provided with inner holes, as shown in fig. 5-6, the hinge structure hinged with the upper hinge part 11 on the upper hinge member 2 is an insert plate 21 which can be inserted into the two parallel hinge plates, the hinge plates and the inner holes 211 of the insert plate 21 are fastened with hinge pieces 7 to realize stable hinge, and the hinge pieces 7 are generally flat-head cylindrical pins with holes, and the structure of the hinge pieces is shown in fig. 11.
Based on the above description about the structure of the lower hinge portion, the portion of the connecting member hinged to the lower hinge portion may be designed to have the same structure as the upper insert plate of the upper hinge member (the "insert plate" on the connecting member is denoted by 31), as shown in fig. 9 to 10, the connecting member is a symmetrical member as a whole, i.e., the portion hinged to the lower hinge member at the other end thereof is also denoted by an insert plate structure, so that the hinge structure of the lower hinge member hinged to the insert plate structure on the connecting member may refer to the form of two parallel hinge plates on the arc-shaped grip, as shown in fig. 7 to 8, and the "hinge plate" on the lower hinge member is denoted by.
It should be noted that the form of the hinge structure of each part of the concrete core sample clamping device at the hinge joint is not limited to the above description, and the above structural description does not constitute a limitation to this patent.
In order to detachably connect the lower hinge member and the lower pressing rod and ensure the verticality, the lower hinge member 4 and the lower pressing rod 5 can be considered to be in threaded connection, and the central hole of the lower hinge member is a threaded hole.
Similarly, in order to ensure the detachable connection and the coaxiality of the upper pressure lever and the lower pressure lever, the lower pressure lever 5 and the upper pressure lever 6 are also combined in a threaded connection mode, the extending end of the lower pressure lever is provided with an external thread, and the end part of the upper pressure lever is provided with a threaded inner hole which is matched and connected with the external thread of the lower pressure lever. In fact, the upper pressing rod can also be overlapped by a plurality of sub upper pressing rods 61 according to the actual use condition of the core sample clamping device, as shown in fig. 1, the adjacent sub upper pressing rods 61 are in head-to-tail threaded connection, and the sub upper pressing rods are rod pieces with the length of about 60cm generally.
In order to realize good package of the core sample when being clamped to the maximum extent, the number of the arc-shaped grippers 1 is four in the embodiment, the distance between the arc-shaped grippers is 8-10 mm, the distance is enough to enable the arc-shaped grippers to be combined to change the diameter, and meanwhile, the arc-shaped grippers can surround the core sample by 360 degrees, so that the core sample is prevented from falling off, and the core sample is prevented from being damaged by clamping.
The inner wall of the core sample grabbing end of the arc-shaped gripper 1 is further provided with an anti-slip structure 13, preferably, the anti-slip structure is a tiny saw-toothed structure, the tips of the saw teeth 131 of the saw-toothed structure face the direction of the connecting end, as shown in fig. 4, the saw-toothed design can ensure that when the arc-shaped gripper is placed downwards, the grinding resistance between the arc-shaped gripper and the core sample is small, and when the arc-shaped gripper is taken upwards, the grinding resistance between the arc-shaped gripper and the core sample is large, so that the clamping of the core.
The working principle and the process of the concrete core sample clamping device are as follows:
1) when the upper pressure lever is pressed downwards, the diameter of the upper pressure lever is larger than that of the central hole of the upper hinge component, and the upper pressure lever and the upper hinge component have relative displacement limitation, so that the arc-shaped gripper only can be properly opened at a certain angle, and the arc-shaped gripper can be conveniently placed in.
2) When the upper pressure rod is upwards extracted, the diameter of the lower pressure rod is equal to that of the central hole of the upper hinge component, the contact surface is smooth, the arc-shaped gripper can be tightened to the diameter of the core sample, and the larger the upward force and displacement are, the tighter the core sample clamp is.
This ware is got to concrete core appearance clamp can be fast in the deep hole, take out the concrete core appearance completely, for a neotype practicality appurtenance, have with the laminating degree of core appearance good, press from both sides get efficient, convenient to use, press from both sides get stable strong, difficult eccentric skidding, simple structure, easy maintenance, according to characteristics such as core appearance diameter expansibility is good of difference.
The present invention is not limited to the specific structure or connection described above, and it is within the scope of the present invention to provide a corer having substantially the same structure or connection as the present invention.
Claims (8)
1. The utility model provides a ware is got to concrete core appearance clamp which characterized by: the core sample gripping device comprises at least two arc-shaped grippers (1) which are uniformly arranged on the circumference and have intervals, wherein one end of each arc-shaped gripper is a connecting end, the other end of each arc-shaped gripper is a core sample gripping end, and the inner wall of the connecting end of each arc-shaped gripper is provided with an upper hinge part (11) and a lower hinge part (12) which correspond to each other in the vertical position at intervals along the length direction of each arc-shaped gripper; the device is characterized by further comprising an upper hinge member (2) which is hinged with the upper hinge parts (11) of the plurality of arc-shaped grippers simultaneously, a plurality of connecting pieces (3) which are hinged with the lower hinge parts (12) in a one-to-one correspondence mode, and a lower hinge member (4) which is hinged with the other end parts of the plurality of connecting pieces (3) simultaneously, wherein the centers of the upper hinge member (2) and the lower hinge member (4) are aligned and are provided with center holes, the center holes of the upper hinge member are through holes, a lower pressure rod (5) is arranged in the center holes of the upper hinge member and the lower hinge member, the end part of the lower pressure rod, which deviates from the lower hinge member, is an extending end extending out of the surface of the upper hinge member, an upper pressure rod (6) used for controlling the arc-shaped grippers to open or tighten; the lower hinge member is located between the lower hinge portion and the upper hinge member as viewed in the axial direction of the lower pressure lever.
2. The concrete core sample gripper as recited in claim 1, wherein: the number of the arc-shaped grippers (1) is four.
3. The concrete core sample gripper as recited in claim 2, wherein: the distance between the arc-shaped grippers (1) is 8-10 mm.
4. A concrete core sampler as claimed in claim 1, 2 or 3, wherein: the inner wall of the core sample grabbing end of the arc-shaped grab is provided with an anti-skidding structure (13).
5. The concrete core sample gripper as recited in claim 4, wherein: the anti-slip structure (13) is a sawtooth structure, and the tips of the sawteeth (131) of the sawtooth structure face the direction of the connecting end.
6. The concrete core sample gripper as recited in claim 1, wherein: the center hole of the lower hinge component (4) is a threaded hole, and the lower pressure lever (5) is in threaded connection with the lower hinge component (4).
7. The concrete core sample gripper as claimed in claim 1 or 6, wherein: the extending end of the lower pressure lever (5) is provided with external threads, and the upper pressure lever (6) is in threaded connection with the extending end of the lower pressure lever (5).
8. The concrete core sample gripper as recited in claim 7, wherein: the upper pressure lever comprises a plurality of sub upper pressure levers (61), and the adjacent sub upper pressure levers are in head-to-tail threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910612965.9A CN112213143A (en) | 2019-07-09 | 2019-07-09 | Concrete core sample clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910612965.9A CN112213143A (en) | 2019-07-09 | 2019-07-09 | Concrete core sample clamping device |
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| Publication Number | Publication Date |
|---|---|
| CN112213143A true CN112213143A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910612965.9A Pending CN112213143A (en) | 2019-07-09 | 2019-07-09 | Concrete core sample clamping device |
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| CN (1) | CN112213143A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945410A (en) * | 2021-10-14 | 2022-01-18 | 山东省交通工程监理咨询有限公司 | Road core extractor |
-
2019
- 2019-07-09 CN CN201910612965.9A patent/CN112213143A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945410A (en) * | 2021-10-14 | 2022-01-18 | 山东省交通工程监理咨询有限公司 | Road core extractor |
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