CN203929505U - A kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching - Google Patents
A kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching Download PDFInfo
- Publication number
- CN203929505U CN203929505U CN201420326929.9U CN201420326929U CN203929505U CN 203929505 U CN203929505 U CN 203929505U CN 201420326929 U CN201420326929 U CN 201420326929U CN 203929505 U CN203929505 U CN 203929505U
- Authority
- CN
- China
- Prior art keywords
- self
- hollow shape
- reinforcing bar
- voussoir
- locking jig
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching, comprise low-temperature test chamber, reinforcing bar sample and for reinforcing bar sample being fixed on to upper fixture and the lower clamp in low-temperature test chamber, upper fixture and lower clamp be one end of connecting reinforcement sample respectively, and is fixed on low-temperature test chamber; One end that upper fixture and lower clamp coordinate with reinforcing bar sample is that cross section is the hollow shape tube-in-tube structure of U-shaped, the internal diameter of U-shaped openend is less than the internal diameter of U-shaped bottom, and the inwall of hollow shape sleeve is smooth bevel transition to bottom from openend, and self-locking jig also comprises the voussoir that is arranged on hollow shape sleeve inner.There is this kind of self-locking jig of said structure by being provided with upper fixture and the lower clamp of the hollow shape sleeve on inclined-plane, and coordinate voussoir to be fixed reinforcing bar sample, avoid sample to carry out cut, the data of the reinforcing bar sample that assurance is measured in cryogenic tensile test are true, reliable.
Description
Technical field
The utility model relates to metal material cryogenic tensile test field, especially relates to the self-locking jig of a kind of being applicable to-165 ℃ ultralow temperature steel bar stretching test.
Background technology
The low temperature reinforcing bar of resistance to-165 ℃ is widely used in the construction of LNG tank engineering, and supplier need provide the cryogenic tensile test findings of-165 ℃, and sample do not allow turning processing, consistent with mother metal to guarantee the tensile property of measuring.At present, steel bar stretching test General Requirements carries out under normal temperature environment, the design of normal temperature fixture, install comparatively simple, but need in low-temperature test chamber, carry out during cryogenic tensile, owing to being put to the test, machine stroke is limit, in cryogenic box fixture need that volume is little, holding force is large, low temperature resistant, so low temperature jig Design, difficulty is installed.In prior art, the applicable minimum temperature of low temperature fixture of reinforcing bar sample is-80 ℃, and reinforcing bar sample needs turning to be processed into the standard sample of band shoulder, structure as shown in Figure of description 1, the stretching result drawing like this can not truly reflect parent material of reinforcement rebar whole mechanical property at low temperatures.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching for problems of the prior art, its objective is in assurance and reinforcing bar sample is not carried out under the prerequisite of turning processing, reflect that truly, accurately reinforcing bar sample is at the tensile property of low temperature below-165 ℃.
The technical solution of the utility model is that self-locking jig that this kind is applicable to ultralow temperature steel bar stretching test comprises low-temperature test chamber, reinforcing bar sample and for reinforcing bar sample being fixed on to the fixture in low-temperature test chamber, described fixture comprises fixture and lower clamp, upper fixture and lower clamp be one end of connecting reinforcement sample respectively, and is fixed on low-temperature test chamber; One end that described upper fixture and lower clamp coordinate with reinforcing bar sample is that cross section is the hollow shape tube-in-tube structure of U-shaped, the internal diameter of U-shaped openend is less than the internal diameter of U-shaped bottom, and the inwall of hollow shape sleeve is smooth bevel transition to bottom from openend, described self-locking jig also comprises the voussoir that is arranged on hollow shape sleeve inner, the face that voussoir coordinates with hollow shape sleeve ramp is smooth bevel, a face relative with smooth bevel is the arc surface coordinating with reinforcing bar sample, and the other end of upper fixture and lower clamp is connected with universal tensile testing machine.
The arc surface that described voussoir coordinates with reinforcing bar sample is provided with the some toppings that increase voussoir and reinforcing bar sample friction force.
The oblique angle scope on the inclined-plane on described voussoir and hollow shape sleeve interior surface inclined-plane is all 5 °-20 °.
As a kind of preferred version of the present utility model, the oblique angle scope on the inclined-plane on described voussoir and hollow shape sleeve interior surface inclined-plane is preferably 6 °-15 °.
The bottom of described hollow shape sleeve is provided with for the mounting hole of pretension screw is installed, and pretension screw acts on voussoir.
The side of described hollow shape sleeve is provided with for the gathering sill of set screw is installed.
The self-locking jig that this kind with said structure is applicable to the test of ultralow temperature steel bar stretching has the following advantages:
1. the self-locking jig that this kind is applicable to the test of ultralow temperature steel bar stretching is by being provided with upper fixture and the lower clamp of the hollow shape sleeve on inclined-plane, and coordinate voussoir to be fixed reinforcing bar sample, avoid sample to carry out cut, the data of the reinforcing bar sample that assurance is measured in cryogenic tensile test are true, reliable, and under low temperature environment, can realize the tensile testing of Multi-example, many specifications, greatly save cost.
2. to be applicable to the self-locking jig installation process of ultralow temperature steel bar stretching test simple for this kind, is swift in motion, and is difficult for skidding, easy to operate, safety labor-saving, and labour intensity that can the person of lightening one's labor, increases work efficiency.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the structural representation of reinforcing bar sample in prior art.
Fig. 2 is structural representation of the present utility model.
Fig. 3 goes up the structural representation of fixture or lower clamp in the utility model.
Fig. 4 is the structural representation that in the utility model, upper fixture or lower clamp coordinate with voussoir.
In Fig. 1-4,1: low-temperature test chamber; 2: reinforcing bar sample; 3: upper fixture; 4: lower clamp; 5: voussoir; 6: pretension screw; 7: set screw; 8: gathering sill.
Embodiment
Fig. 1 is the structural representation of reinforcing bar sample in prior art, and as shown in the figure, reinforcing bar sample needs turning to be processed into the standard sample of band shoulder, and the stretching result drawing like this can not truly reflect parent material of reinforcement rebar whole mechanical property at low temperatures.
Fig. 2 is structural representation of the present utility model, and Fig. 3 is the structural representation of upper fixture and lower clamp in the utility model, and Fig. 4 is the structural representation that in the utility model, upper fixture or lower clamp coordinate with voussoir.From structure shown in Fig. 2-Fig. 4 in conjunction with, the self-locking jig that this kind is applicable to ultralow temperature steel bar stretching test comprises low-temperature test chamber 1, reinforcing bar sample 2 and for reinforcing bar sample 2 is fixed on to the fixture in low-temperature test chamber 1, fixture comprises fixture 3 and lower clamp 4, upper fixture 3 and lower clamp 4 be one end of connecting reinforcement sample 2 respectively, and is fixed on low-temperature test chamber 1; One end that described upper fixture 3 and lower clamp 4 coordinate with reinforcing bar sample 2 is that cross section is the hollow shape tube-in-tube structure of U-shaped, the internal diameter of U-shaped openend is less than the internal diameter of U-shaped bottom, and the inwall of hollow shape sleeve is smooth bevel transition to bottom from openend, described self-locking jig also comprises the voussoir 5 that is arranged on hollow shape sleeve inner, the face that voussoir 5 coordinates with hollow shape sleeve ramp is smooth bevel, and coats kollag; A face relative with smooth bevel is the arc surface coordinating with reinforcing bar sample 2, and the arc surface that voussoir 5 coordinates with reinforcing bar sample 2 is provided with the some toppings that increase voussoir 5 and reinforcing bar sample 2 friction force.The other end of upper fixture 3 and lower clamp 4 is connected with universal tensile testing machine.
The oblique angle scope on the inclined-plane on voussoir 5 and hollow shape sleeve interior surface inclined-plane is all 5 °-20 °.As a kind of preferred version of the present utility model, the oblique angle scope on the inclined-plane on voussoir 5 and hollow shape sleeve interior surface inclined-plane is preferably 6 °-15 °.
The bottom of hollow shape sleeve is provided with for the mounting hole of pretension screw 6 is installed, and pretension screw 6 acts on voussoir 5; The side of hollow shape sleeve is provided with for the gathering sill 8 of set screw 7 is installed.
A kind of using method that is applicable to the self-locking jig of ultralow temperature steel bar stretching test comprises:
1) hollow shape tube-in-tube structure one end of upper fixture 3 and lower clamp 4 is stretched in cryogenic box 1, and be connected with reinforcing bar sample 2, the other end of upper fixture 3 and lower clamp 4 is connected with universal tensile testing machine;
2) three voussoirs 5 are put into the hollow shape sleeve of upper fixture 3 and lower clamp 4, and fixing by set screw 7;
3) voussoir 5 is evenly distributed in the hollow shape sleeve of upper fixture 3 and lower clamp 4, then reinforcing bar sample 2 put into the circular preformed hole place of three voussoirs, 5 compositions and shifted onto position, be screwed into pretension screw 6 and adjust voussoir 5 ends in same plane, now set screw 7 is in the interior movement of gathering sill 8, continue to adjust pretension screw 6 and make the nip surface of reinforcing bar sample 2 of topping on voussoir 5 form primary clamp force, can start the tension test of reinforcing bar under ultra-low temperature surroundings.
This kind with said structure is applicable to the self-locking jig of ultralow temperature steel bar stretching test and using method thereof by being provided with upper fixture and the lower clamp of the hollow shape sleeve on inclined-plane, and coordinate voussoir to be fixed reinforcing bar sample, avoid sample to carry out cut, the data of the reinforcing bar sample that assurance is measured in cryogenic tensile test are true, reliable, and under low temperature environment, can realize the tensile testing of Multi-example, many specifications, greatly save cost; And installation process is simple, be swift in motion, be difficult for skidding, easy to operate, safety labor-saving, labour intensity that can the person of lightening one's labor, increases work efficiency.
Claims (6)
1. one kind is applicable to the self-locking jig that ultralow temperature steel bar stretching is tested, it is characterized in that: described self-locking jig comprises low-temperature test chamber (1), reinforcing bar sample (2) and for reinforcing bar sample (2) being fixed on to the fixture in low-temperature test chamber (1), described fixture comprises fixture (3) and lower clamp (4), upper fixture (3) and lower clamp (4) be one end of connecting reinforcement sample (2) respectively, and is fixed on low-temperature test chamber (1), one end that described upper fixture (3) and lower clamp (4) coordinate with reinforcing bar sample (2) is that cross section is the hollow shape tube-in-tube structure of U-shaped, the internal diameter of U-shaped openend is less than the internal diameter of U-shaped bottom, and the inwall of hollow shape sleeve is smooth bevel transition to bottom from openend, described self-locking jig also comprises the voussoir (5) that is arranged on hollow shape sleeve inner, the face that voussoir (5) coordinates with hollow shape sleeve ramp is smooth bevel, a face relative with smooth bevel is the arc surface coordinating with reinforcing bar sample (2), upper fixture (3) is connected with universal tensile testing machine with the other end of lower clamp (4).
2. a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching according to claim 1, is characterized in that: the arc surface that described voussoir (5) coordinates with reinforcing bar sample (2) is provided with the some toppings that increase voussoir (5) and reinforcing bar sample (2) friction force.
3. a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching according to claim 2, is characterized in that: the oblique angle scope on the inclined-plane on described voussoir (5) and hollow shape sleeve interior surface inclined-plane is all 5 °-20 °.
4. a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching according to claim 3, is characterized in that: the oblique angle scope on the inclined-plane on described voussoir (5) and hollow shape sleeve interior surface inclined-plane is preferably 6 °-15 °.
5. according to a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching described in claim 1-4 any one claim, it is characterized in that: the bottom of described hollow shape sleeve is provided with for the mounting hole of pretension screw (6) is installed, and pretension screw (6) acts on voussoir (5).
6. a kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching according to claim 5, is characterized in that: the side of described hollow shape sleeve is provided with the gathering sill (8) for set screw (7) are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420326929.9U CN203929505U (en) | 2014-06-18 | 2014-06-18 | A kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420326929.9U CN203929505U (en) | 2014-06-18 | 2014-06-18 | A kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203929505U true CN203929505U (en) | 2014-11-05 |
Family
ID=51825305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420326929.9U Expired - Fee Related CN203929505U (en) | 2014-06-18 | 2014-06-18 | A kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203929505U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034579A (en) * | 2014-06-18 | 2014-09-10 | 马钢(集团)控股有限公司 | Self-locking clamp suitable for ultralow-temperature steel bar tension test and using method of clamp |
| CN106525573A (en) * | 2016-12-12 | 2017-03-22 | 兰州大学 | Self-adaptive clamp for superconductive multi-strand wire |
-
2014
- 2014-06-18 CN CN201420326929.9U patent/CN203929505U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034579A (en) * | 2014-06-18 | 2014-09-10 | 马钢(集团)控股有限公司 | Self-locking clamp suitable for ultralow-temperature steel bar tension test and using method of clamp |
| CN106525573A (en) * | 2016-12-12 | 2017-03-22 | 兰州大学 | Self-adaptive clamp for superconductive multi-strand wire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203929505U (en) | A kind of self-locking jig that is applicable to the test of ultralow temperature steel bar stretching | |
| CN103175741A (en) | Device and testing method for reinforcing steel bar tensile test in supper-low temperature environment | |
| CN104034579A (en) | Self-locking clamp suitable for ultralow-temperature steel bar tension test and using method of clamp | |
| CN104198279B (en) | Standard specimen union joint is used in a kind of stretching | |
| CN203606210U (en) | Clamping device for Z-direction tensile testing on steel plate | |
| CN203463859U (en) | Thief hole sealing cap for rapidly detachable gas pipe | |
| CN205352833U (en) | Bolt tensile test universal fixturing | |
| CN205096567U (en) | Combination tool holder of processing valve body | |
| CN203965247U (en) | A kind of novel fastener tensile test apparatus | |
| CN204373990U (en) | Sprayed concrete early strength rapid determination device | |
| CN202886187U (en) | Tensile strength testing fixture | |
| CN204228514U (en) | A kind of stretching uses standard sample connector | |
| CN204666060U (en) | A kind of variator bonnet comprehensively tests tool | |
| CN204594393U (en) | A kind of automobile bend pipe cubing | |
| CN203977877U (en) | Flexible locking type new reinforcing steel bar tied silk hook | |
| CN204082843U (en) | A kind of stone bolt | |
| CN203254081U (en) | Omnidirectional tangential intersecting laying-off template for pipelines | |
| CN103940665B (en) | Bridge zinc-coated wire makees the clamping device of high frequency fatigue test | |
| CN203101191U (en) | Device for steel bar tension test in ultra-low-temperature environment | |
| CN202290092U (en) | Crucible tongs | |
| CN205968847U (en) | Piston frock | |
| CN204944400U (en) | One is exclusively used in pipe fitting internal groove and takes measurement of an angle dip stick | |
| CN202002589U (en) | Multifunctional convenient measuring scale | |
| CN104999257A (en) | Assembly device and assembly method of hose component metal thread connecting piece | |
| CN205749101U (en) | A kind of safety device for steel concrete supporting tension test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20210618 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |