CN211652633U - Shrinkage test device behind loose tube - Google Patents
Shrinkage test device behind loose tube Download PDFInfo
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- CN211652633U CN211652633U CN201921718626.0U CN201921718626U CN211652633U CN 211652633 U CN211652633 U CN 211652633U CN 201921718626 U CN201921718626 U CN 201921718626U CN 211652633 U CN211652633 U CN 211652633U
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- type groove
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Abstract
The utility model relates to a loose tube backward shrinkage test device, which comprises a test platform bottom plate, a fixed V-shaped groove, a movable V-shaped groove and a measuring instrument, wherein the fixed V-shaped groove, the movable V-shaped groove and the measuring instrument are sequentially arranged from back to front, the length of the fixed V-shaped groove is 300mm, the rear end of the fixed V-shaped groove is provided with a baffle, the movable V-shaped groove is positioned in front of the fixed V-shaped groove and can be butted with the front end of the fixed V-shaped groove, a loose tube is placed in the fixed V-shaped groove, and the outer sides of the fixed V-; during measurement, the rear end of the loose tube props against the baffle, the front end of the loose tube is cut at the front end of the fixed V-shaped groove, and the measuring device is used for measuring the shrinkage distance of the loose tube after cutting, so that the accurate length of the loose tube is obtained. The difficulty of loose sleeve pipe crooked has been overcome to this application, keeps straight not crooked in the measurement process. The measuring instrument is adopted to carry out accurate measurement to obtain accurate data before and after the shrinkage test after the loose tube, the accuracy can reach 0.01mm, and the requirement of the industry standard is higher.
Description
Technical Field
The utility model relates to a testing arrangement of shrink behind loose tube.
Background
The test method for the axial shrinkage of loose tubes is specified in the communications industry standard YD/T1118.1-2001, wherein a test accuracy of 0.02mm and a test length of about 300mm are required. The precision required by the test is high, in the actual operation process, the micrometer is required to be used for being accurate to 0.02mm, and the conventional micrometer cannot be applied to a sample with the measurement length of 300 mm. In addition, the loose tube cannot be guaranteed to be straight and not bent during measurement, difficulty is brought to sample measurement after sampling and testing, measurement is not accurate, and experimental data are unreliable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned prior art provide a device of ability accurate measurement loose tube sample length, overcome the crooked difficulty of loose tube when measuring, make the measurement requirement that reaches industry standard, guarantee that test data is accurate reliable.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a shrink test device behind loose sleeve pipe, the test platform bottom plate, from setting gradually fixed V type groove, activity V type groove, measuring tool to preceding after on the test platform bottom plate, the length in fixed V type groove is 300mm, the rear end in fixed V type groove is provided with the baffle, activity V type groove is located fixed V type groove the place ahead can remove to dock with fixed V type groove front end, and the loose sleeve pipe is placed fixed V type inslot, fixed V type groove and activity V type groove outside all set up and are used for fixed loose sheathed tube anchor clamps.
During measurement, the rear end of the loose tube abuts against the baffle, the front end of the loose tube is cut at the front end of the fixed V-shaped groove, and the measuring device is used for measuring the contraction distance of the loose tube relative to the front end of the fixed V-shaped groove after cutting, so that the actual length of the loose tube is obtained.
Optionally, the measuring instrument is a micrometer or an electronic watch with an accuracy of 0.01 mm.
Specifically, anchor clamps include the base, press the awl, crank arm, handle, press the awl to fix on crank arm, crank arm and handle articulate respectively on the base, handle and crank arm are articulated each other, the handle acts on crank arm, makes to press the awl to compress tightly loose sleeve pipe in fixed V type inslot.
Optionally, the end of the pressing cone is provided with a V-shaped notch, and the loose tube is pressed under the V-shaped notch, so that the loose tube is prevented from sliding and bending.
Optionally, a strip-shaped hole is formed in the movable V-shaped groove, and a screw is arranged in the strip-shaped hole, so that the position of the movable V-shaped groove can be adjusted.
The length of a fixed V-shaped groove on the test platform base is 300mm and is used for placing a loose tube, one end of the loose tube abuts against a baffle at the rear end of the fixed V-shaped groove, the loose tube is fixed by a clamp and does not slide and bend, a movable V-shaped groove is adjusted to the front end of the fixed V-shaped groove and is in front-back butt joint, and the surplus length part at the front end of the loose tube is fixed in the movable V-shaped groove. The loose tube is then cut approximately 300mm along the front end of the fixed V-groove and the cut loose tube fixed to the movable V-groove is removed. The measuring instrument is aligned with the front end of the fixed V-shaped groove, and the counting returns to zeroAnd finally, measuring the deviation value of the cut loose tube relative to the front end of the fixed V-shaped groove by using a measuring instrument (if the loose tube shrinks, the measured value is negative, and if the loose tube lengthens, the measured value is positive), wherein the precision is 0.01 mm. The actual length L of the loose tube0300+ offset (mm), the measurement instrument is always fixed.
And then taking down the loose tube, heating and insulating the loose tube, then measuring, re-fixing the loose tube on the fixed V-shaped groove, enabling the rear end of the loose tube to abut against the baffle, adjusting the movable V-shaped groove to be in front-back butt joint with the fixed V-shaped groove, supporting the extension part of the loose tube on the movable V-shaped groove, keeping the whole loose tube straight front and back, and measuring the deviation value of the loose tube relative to the front end of the fixed V-shaped groove by using a measuring instrument, wherein the precision is 0.01 mm. The actual length L of the loose tube1300+ deviation (mm), according to L (%) (L)0-L1)/L0100 evaluation of the post-shrinkage of the loose tube.
Compared with the prior art, the invention has the advantages that:
the difficulty of bending the loose sleeve is overcome, and the loose sleeve is kept straight and not bent in the measuring process.
The measuring instrument is adopted to carry out accurate measurement to obtain accurate data before and after the shrinkage test after the loose tube, the accuracy can reach 0.01mm, and the requirement of the industry standard is higher.
The method and the device can accurately detect the post-shrinkage performance of the PBT material, and are convenient for guiding how to select a proper loose sleeve material and a production process.
Drawings
Fig. 1 is a schematic structural diagram of a shrinkage test device after loosening a sleeve in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a shrinkage test device after loosening a sleeve in embodiment 2 of the present invention.
FIG. 3 is a right side view of the loose tube holder 4 according to embodiments 1 and 2 of the present invention
Reference numeral 1-a test platform base plate, 2-a fixed V-shaped groove, 3-a movable V-shaped groove, 4-a clamp, 5-a measuring instrument, 6-a measuring instrument base, 7-a baffle, 8-a vernier caliper, 9-a rivet, 10-a rivet, 11-a rivet, 12-a rivet, 13-a press cone and 14-a handle.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
Shrink test device behind loose tube includes test platform bottom plate 1, from setting gradually fixed V type groove 2, activity V type groove 3, measuring tool 5 to preceding after on the test platform bottom plate 1, the length in fixed V type groove 2 is 300mm, and the rear end in fixed V type groove 2 is provided with baffle 7.
Activity V type groove 3 is located 2 the place ahead in fixed V type groove, has seted up the bar hole on the activity V type groove 3 to set up the screw rod in the bar hole, thereby can make with the seamless butt joint of 2 front ends in fixed V type groove by 2 adjustments in relatively fixed V type groove.
The loose tube is placed in a fixed V-shaped groove 2, and the outer sides of the fixed V-shaped groove 2 and the movable V-shaped groove 3 are provided with clamps 4 for fixing the loose tube.
In the present embodiment, the distance measuring instrument 5 is a micrometer having a precision of 0.01 mm.
Anchor clamps 4 include the base, press awl 13, crank arm, handle 14, press awl 13 to fix on crank arm, are provided with V type notch on pressing the front end terminal surface of awl, loose sleeve pipe is pressed and is articulated on the base through the rivet respectively at this V type notch lower crank arm and handle 14, and handle 14 and crank arm are articulated each other, and handle 14 acts on crank arm and makes the action of pressing the awl compress tightly loose sleeve pipe in fixed V type inslot.
The test method comprises the following steps: before measurement, the measurement instrument 5 is firstly subjected to zero calibration, the position of a measuring head of the measurement instrument 5 is aligned with the left end edge of the fixed V-shaped groove 2, and counting is returned to zero. During the measurement, fixed V type groove 2 is used for placing the loose tube on test platform base 1, the length in fixed V type groove is accurate 300mm length, loose tube one end supports fixed V type groove 2 right side baffle 7, with the fixed loose tube bending that does not slide of 2 top anchor clamps of fixed V type groove 4, cut off loose tube along fixed V type groove 2 left end, because notched out of plumb or unevenness, loose tube is about 300mm, adjust activity V type groove 3 position afterwards, activity V type groove 3 and fixed V type groove 2 all around butt joint and be in same height, adjacent fixed V type groove 2, measure deviation numerical value with measuring instrument 5 accuracy at last, the precision is 0.01 mm. Then the sleeve is loosenedLength L0: 300+ deviation value (mm), the measuring instrument 5 is fixed on the measuring instrument seat 6 by a screw and is not movable.
After the sampled loose sleeve passes through a constant temperature test box at 85 ℃ for 24 hours, the loose sleeve is taken out and cooled to room temperature, and the method is still used for measuring the length L of the loose sleeve after the test1And then the test result is:
L(％)＝(L0-L1)/L0*100
the arithmetic mean of 5 samples was taken as the post-shrinkage test result of the sample.
Example 2
Referring to fig. 2, the loose tube sampling method is the same as that of example 1, and the length measurement is performed by using a vernier caliper to be accurate to 0.01mm, so that the accurate value of the loose tube can be directly obtained. The post-shrinkage test results were obtained in the same manner.
Although the preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a shrink test device behind loose tube which characterized in that: test platform bottom plate, from setting gradually fixed V type groove, activity V type groove, measuring tool to preceding after on the test platform bottom plate, the length in fixed V type groove is 300mm, the rear end in fixed V type groove is provided with the baffle, activity V type groove is located fixed V type groove the place ahead can remove to dock with fixed V type groove front end, and the pine sleeve pipe is placed fixed V type inslot, fixed V type groove and activity V type groove outside all set up and are used for fixed loose sheathed tube anchor clamps.
2. The loose tube post-shrinkage test device of claim 1, wherein: the measuring instrument is a micrometer or an electronic watch with the precision of 0.01 mm.
3. The loose tube post-shrinkage test device of claim 1, wherein: the clamp comprises a base, a pressing cone, a crank arm and a handle, wherein the pressing cone is fixed on the crank arm, the crank arm and the handle are hinged to the base respectively, the handle and the crank arm are hinged to each other, and the handle acts on the crank arm to enable the pressing cone to compress the loose sleeve in the fixed V-shaped groove.
4. The loose tube post-shrinkage test device of claim 3, wherein: the end of the pressing cone is provided with a V-shaped notch, and the loose tube is pressed below the V-shaped notch.
5. The loose tube post-shrinkage test device of claim 1, wherein: a strip-shaped hole is formed in the movable V-shaped groove, and a screw rod is arranged in the strip-shaped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921718626.0U CN211652633U (en) | 2019-10-14 | 2019-10-14 | Shrinkage test device behind loose tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921718626.0U CN211652633U (en) | 2019-10-14 | 2019-10-14 | Shrinkage test device behind loose tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211652633U true CN211652633U (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921718626.0U Active CN211652633U (en) | 2019-10-14 | 2019-10-14 | Shrinkage test device behind loose tube |
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| Country | Link |
|---|---|
| CN (1) | CN211652633U (en) |
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2019
- 2019-10-14 CN CN201921718626.0U patent/CN211652633U/en active Active
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