CN102706732B - Device for sticking and straightening drawing head by adopting drilling and pulling method - Google Patents
Device for sticking and straightening drawing head by adopting drilling and pulling method Download PDFInfo
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- CN102706732B CN102706732B CN201210187785.9A CN201210187785A CN102706732B CN 102706732 B CN102706732 B CN 102706732B CN 201210187785 A CN201210187785 A CN 201210187785A CN 102706732 B CN102706732 B CN 102706732B
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- drawing head
- sleeve
- sticking
- core sample
- concrete
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to a device for sticking and straightening a drawing head by adopting a drilling and pulling method. The device is characterized by comprising a drawing head and a sleeve (3) matched with a concrete core sample, wherein a diaphragm (2) is arranged in an inner hole of the sleeve. An outer cylindrical surface of the sleeve is a conical surface which is matched with a core sample ring groove (5) so as to facilitate the obtaining of the coaxility of the drawing head (1) and a core sample (6). The device for sticking and straightening the drawing head, which is disclosed by the invention, is placed into the ring groove formed by drilling of a special drilling machine, so that the drawing head can be stuck at the central position when the drawing head is stuck without sideslip; particularly when a detection surface is vertically arranged, the sliding even falling of the drawing head can be avoided; and in addition, structural adhesive for sticking can be prevented from leaking into the ring groove and the problem that the drawing head is difficult in sticking in the testing process of the axial tensile strength of concrete on a structure solid body is solved.
Description
Technical field
The present invention relates to a kind of device of on-the-spot test concrete tensile strength, particularly a kind of drawing head of concrete core sample pullout machine pastes erection device.
Background technology
The test of structural concrete compressive strength is now very ripe both at home and abroad, also a lot of corresponding technical standard has been worked out, but concrete axial tensile strength for new construction design, old building thing rebuilding and reinforcement is often even more important, as checking computations structural concrete whether ftracture, fracture width etc.Still there is no the direct instruments and methods testing concrete tensile strength on structural solid both at home and abroad at present, have in standard a kind of in testing laboratory production standard test specimen be placed on method universal testing machine doing axle center tensile test, the shortcoming of the method makes test specimen inconvenience, and test value intuitively can not reflect the situation of engineering entity, certain difference is had with structural solid, especially for existing building and bond between fresh and hardened concretes situation, because of cannot production standard test specimen and can not get its tensile strength.There is a kind of method can the concrete split tensile strength of test structure in standard, be then converted into concrete axial tensile strength, but the inherently data by rule of thumb that convert, accuracy is difficult to ensure.Researchist efforts be made so that always and uses concrete core sample pullout machine, utilize and bore the test that daraf(reciprocal of farad) carries out on-the-spot axial tensile strength, but the problem how realizing pasting efficiently and easily drawing head in arbitrarily angled detection faces does not solve all the time.
Summary of the invention
The object of the invention is to solve the drawing head of existing concrete core sample pullout machine and core and paste the problem that end face cannot adjust, provide and a kind ofly bore the anti-skidding leakproof erection device of daraf(reciprocal of farad), for solving the stickup of boring drawing head in daraf(reciprocal of farad).
This invention takes following technical scheme:
A kind of daraf(reciprocal of farad) drawing head that bores pastes erection device, and it is characterized in that it comprises a sleeve coordinated with drawing head and concrete core sample, hub internal bore is provided with barrier film.Described barrier film is plastic foil, and the hub internal bore wall of liner coordinates with drawing head and concrete core sample outside cylinder, correctly aims at and after firm pasting, be beneficial to taken out by sleeve and can not cement with drawing head when drawing head and concrete core sample.
On the basis of technique scheme, there is the technical scheme of following optimization:
The external cylindrical surface of described sleeve is taper surface, and the conical surface coordinates with core annular groove, is beneficial to the right alignment ensureing drawing head and core.
The present invention has following beneficial effect: achieve when at the scene structural solid testing concrete axial tensile strength, the efficient stickup of drawing head, thus ensure that the accuracy of test data.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, the present invention is that a kind of daraf(reciprocal of farad) drawing head that bores pastes erection device, and it comprises a sleeve 3 coordinated with drawing head and concrete core sample, and the external cylindrical surface of sleeve 3 is taper surface, and sleeve 3 endoporus is provided with barrier film 2.
Before utilizing the present invention, first on structural concrete structural matrix 4, get out with rig the concrete core sample 6 that diameter is 75mm, length 152mm, keep concrete core sample 6 to be connected with xoncrete structure parent 4.The ring groove 5 that width is about 4mm is formed between concrete core sample and structural matrix.
After having bored ring groove 5, dried up by trough inner water, put into circumferential groove 5 after righting-oriented sleeve 3 of the present invention is padded upper barrier film 2, sleeve 3 exceeds concrete surface and is about 5mm.Now, avoid foreign material to fall into effect that groove affects follow-up test is played.When pasting drawing head 1, the sleeve 3 exceeded limits drawing head 1 and can not slide and ensure drawing head 1 and the right alignment of core 6, also can not leak into ring groove, and can ensure that drawing head is pasted onto the position, center of core end face for the structure glue of pasting drawing head.
Claims (1)
1. one kind is bored daraf(reciprocal of farad) drawing head stickup erection device, it is characterized in that it comprises a sleeve coordinated with drawing head and concrete core sample (3), sleeve (3) endoporus is provided with barrier film (2), barrier film (2) liner coordinates with drawing head and concrete core sample outside cylinder at hub internal bore wall, when drawing head and concrete core sample correctly aim at and firm pasting after, be beneficial to sleeve is taken out and can not cement with drawing head, the external cylindrical surface of described sleeve (3) is taper surface, taper surface coordinates with core annular groove, is beneficial to the right alignment ensureing drawing head and core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210187785.9A CN102706732B (en) | 2012-06-08 | 2012-06-08 | Device for sticking and straightening drawing head by adopting drilling and pulling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210187785.9A CN102706732B (en) | 2012-06-08 | 2012-06-08 | Device for sticking and straightening drawing head by adopting drilling and pulling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102706732A CN102706732A (en) | 2012-10-03 |
| CN102706732B true CN102706732B (en) | 2015-07-15 |
Family
ID=46899675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210187785.9A Active CN102706732B (en) | 2012-06-08 | 2012-06-08 | Device for sticking and straightening drawing head by adopting drilling and pulling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102706732B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020013B (en) * | 2014-06-13 | 2016-04-06 | 宁波工程学院 | A kind of non-through concrete cylindrical core sampler and method of operating thereof |
| CN104807699B (en) * | 2015-04-23 | 2018-09-04 | 河北工程大学 | Tensile Strength of Rock experimental rig in situ and its test method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4866992A (en) * | 1987-02-27 | 1989-09-19 | Rice Edward K | Device and method for tensile testing of brittle materials |
| CN101762421A (en) * | 2010-02-09 | 2010-06-30 | 邱平 | Direct pulling device and method for detecting compressive strength of concrete |
| CN202599746U (en) * | 2012-06-08 | 2012-12-12 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Pulling head sticking centralizing device in drilling-pulling method |
-
2012
- 2012-06-08 CN CN201210187785.9A patent/CN102706732B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4866992A (en) * | 1987-02-27 | 1989-09-19 | Rice Edward K | Device and method for tensile testing of brittle materials |
| CN101762421A (en) * | 2010-02-09 | 2010-06-30 | 邱平 | Direct pulling device and method for detecting compressive strength of concrete |
| CN202599746U (en) * | 2012-06-08 | 2012-12-12 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Pulling head sticking centralizing device in drilling-pulling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102706732A (en) | 2012-10-03 |
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Address after: The Huaihe River Road in Anhui province Bengbu City 233000 Longzihu District No. 771 Patentee after: WATER RESOURCES Research Institute OF ANHUI AND HUAIHE RIVER COMMISSION Patentee after: Anhui Construction Engineering Quality Supervision and Inspection Station Co.,Ltd. Address before: The Huaihe River Road in Anhui province Bengbu City 233000 Longzihu District No. 771 Patentee before: WATER RESOURCES Research Institute OF ANHUI AND HUAIHE RIVER COMMISSION Patentee before: ANHUI BUILDING ENGINEERING QUALITY SUPERVISION AND TESTING STATION |
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