CN114309360B - Equidistant sample preparation device for cable shrinkage test - Google Patents
Equidistant sample preparation device for cable shrinkage test Download PDFInfo
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- CN114309360B CN114309360B CN202111668356.9A CN202111668356A CN114309360B CN 114309360 B CN114309360 B CN 114309360B CN 202111668356 A CN202111668356 A CN 202111668356A CN 114309360 B CN114309360 B CN 114309360B
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- cable
- tool rest
- steel
- beam tool
- shrinkage test
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000003825 pressing Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 9
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000013519 translation Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of cable detection, and discloses an equidistant sample preparation device for a cable shrinkage test. According to the invention, the 'translation theorem of force' and the 'distance definition of two parallel planes' are fully utilized, when a right hand holds a compression bar to apply pressure to the middle point of a beam tool rest, the pressure is parallelly transferred to the left and right points of the beam tool rest, namely a fixed blade and a movable blade, at the moment, a cable is in a tight state, and under the assistance of protection of a cable clamp rod and left hand stirring, equal-distance annular rolling cutting of a cable insulation section can be realized at one time, and the left and right end faces are tidy. The invention has the function of rebound, pressure is eliminated, and the cutter automatically restores to the original position, thereby being convenient and quick. The invention has the advantages of carrying handles, small and exquisite appearance, light weight and suitability for carrying in multiple places.
Description
Technical Field
The invention belongs to the technical field of cable processing, and relates to an equidistant sample preparation device for a cable shrinkage test.
Background
In the production process of the crystalline polymer cable, if the extrusion die or the cooling mode is improper, residual stress in the insulation is released to form shrinkage under the action of heat along with the extension of the operation time of the cable, so that the conductor is exposed, and the electric shock danger is generated. The thermal shrinkage test is a measurement of the shrinkage rate of an insulated wire core with a conductor under a heated state and is used for representing the residual damage of the thermal stress of the insulation. The general test provides that the insulation mark length L 0 +/-5 mm is accurate to 0.5mm, and the shrinkage rate is not more than 4%. And a certain torsional bending deformation exists in the process of twisting a plurality of insulating wire cores into a cable, the larger the conductor section is, the larger the manual straight difficulty of the wire cores is, the longer the time length error deviation is larger in sample preparation, and the test result is inaccurate.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the equidistant sample preparation device for the cable shrinkage test, solve the accidental errors caused by human factors and improve the test accuracy.
In order to achieve the above purpose, the present invention is realized by the following technical scheme: the cable clamp is characterized by comprising a base, wherein a tool rest stand column, a pressure lever support column and a cable clamp rod are fixedly connected to the upper surface of the base respectively, the tool rest stand column consists of two guide posts penetrating through springs, a cross beam tool rest connected with the guide posts in a sliding mode is arranged above the springs, positioning nuts are connected to the top ends of the guide posts in a threaded mode, blades for cutting cables are arranged on two sides of the lower surface of the cross beam tool rest, a pressure lever for pressing the cross beam tool rest is hinged to the top end of the pressure lever support column, and the pressure lever is located above the cross beam tool rest.
Further, the upper end of the guide rod is provided with a fixed cover plate, and the fixed cover plate is fixed on the guide rod through a positioning nut.
Further, the compression bar support column is a square steel column.
Further, the pressure lever is wavy, the pressure lever is provided with a section of straight lever handle, and the valley point of the pressure lever is propped against the beam tool rest.
Further, one end of the lower surface of the beam tool rest is welded with a fixed tool holder, the other end of the beam tool rest is provided with a square hole with the length of 10mm-15mm, the movable tool holder is connected below the beam tool rest through a set screw arranged in the square hole, and the fixed tool holder and the movable tool holder are connected with a blade through bolts.
Further, the cable clamp sticks are two groups of steel sticks welded on the base under the fixed tool holder and the movable tool holder, each group is provided with two steel sticks used for limiting a cable, and the length of each steel stick is 10-20 mm and is parallel to the tool rest of the upper beam.
Further, the base is made of steel plates, and the side wall of the base is fixedly connected with a handle.
The invention has the positive beneficial effects that:
The device is inspired by a 'translation theorem of force' and a 'distance definition of two parallel planes', when a right hand holds a compression bar to apply pressure to the middle point of a beam tool rest, the pressure is transferred to the left and right points of the beam tool rest, namely a fixed blade and a movable blade, at the moment, a cable is in a tight state, and under the assistance of protection of a cable clamp rod and left hand stirring, equal-distance annular rolling cutting of a cable insulation section can be realized at one time, and the left and right end faces are tidy. The invention has the function of rebound, pressure is eliminated, and the cutter automatically restores to the original position, thereby being convenient and quick. The invention has the advantages of carrying handles, small and exquisite appearance, light weight and suitability for carrying in multiple places.
Drawings
FIG. 1 is a perspective view of a cable shrinkage test equidistant sample preparation device of the present invention;
FIG. 2 is a front view of a cable shrinkage test equidistant sample preparation device of the present invention;
FIG. 3 is a right side view of the cable shrinkage test equidistant sample preparation device of the present invention;
fig. 4 is a top view of an equidistant sample preparation device for a cable shrinkage test of the invention.
In the figure: 1. a base; 2. a handle; 3. a tool rest column; 4. a compression bar strut; 5. a cable grip; 6. a compression bar; 7. a spring; 8. a beam tool rest; 9. fixing the cover plate; 10. positioning a nut; 11. fixing the tool holder; 12. a movable toolholder; 13. a blade.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings:
referring to fig. 1-4, a equidistant sample preparation device for a cable shrinkage test comprises a base 1, wherein a tool rest upright post 3, a pressure lever upright post 4 and a cable clamping rod 5 are fixedly connected to the upper surface of the base 1 respectively, the tool rest upright post 3 consists of two guide posts penetrating through springs 7, in the embodiment, the guide posts are round steel posts, a beam tool rest 8 which is in sliding connection with the guide posts is arranged above the springs 7, positioning nuts 10 are in threaded connection with the top ends of the guide posts, blades 13 for cutting cables are arranged on two sides of the lower surface of the beam tool rest 8, a pressure lever 6 for pressing the beam tool rest 8 is hinged to the top ends of the pressure lever upright posts 4, and the pressure lever 6 is located above the beam tool rest 8.
According to one embodiment of the present invention, as shown in figures 1-4,
The guide bar upper end is equipped with fixed apron 9, and fixed apron 9 passes through positioning nut 10 to be fixed on the guide bar, makes depression bar 6 be located between fixed apron 9 and the crossbeam knife rest 8, and fixed apron 9 plays the limiting displacement, prevents to lead to depression bar 6 upset to appear unexpected accident because of spring 7 elasticity is too big.
The compression bar support 4 is a square steel column, a round hole is drilled on the side surface of the upper end of the steel column, and the steel column is hinged with the inverted U-shaped lifting lug of the compression bar 6 through a fastening screw.
The compression bar 6 is the wave, and compression bar 6 is equipped with one section straight-bar handle, and the valley point of compression bar 6 supports and presses on crossbeam knife rest 8, and compression bar 6 comprises a circular steel pipe and ". U" -shaped lug welding, and the first half of steel pipe forms the wave after being extruded by square and crooked, and the second half junction can remain transition curve. When the pressing rod 6 performs the pressing action, the valley point of the pressing rod can just abut against the beam tool rest 8, and when the pressing action disappears, the spring 7 pushes the beam tool rest 8 and the pressing rod 6 upwards to achieve the purpose of resetting.
The fixed cutter holder 11 is welded on one end of the lower surface of the beam cutter holder 8, a square hole with the length of 10mm-15mm is formed in the other end of the beam cutter holder 8, the movable cutter holder 12 is connected below the beam cutter holder 8 through a set screw arranged in the square hole, the fixed cutter holder 11 and the movable cutter holder 12 are connected with the cutter blades 13 through bolts, and the distance between the cutter blades 13 reaches L 0 +6mm, so that the distance between the cutter blades is accurate to 0.5mm.
The cable holder stick 5 is two groups of steel sticks welded on the base 1 under the fixed tool holder 11 and the movable tool holder 12, each group is provided with two steel sticks used for limiting a cable, each steel stick is round, the two round steel sticks just can fix the cable, and the adaptability is good, the cable holder stick can adapt to cables with various specifications, the length of each steel stick is 10mm-20mm, and is parallel to the beam tool rest 8 above, the purpose is to ensure that when a finger dials a cable sample to perform circular cutting, the insulating tangent plane of the cable is vertical and level, and in other embodiments, the cable holder stick 5 can also adopt fixing parts such as V-shaped blocks to limit and fix the cable.
According to another embodiment of the present invention, as shown in figures 1-4,
The base 1 is made of steel plates, the side wall of the base 1 is fixedly connected with the handle 2, and the handle 2 is convenient for equipment to move.
All the parts are made of common carbon steel, and the manufacturing cost is economical and practical.
When the invention is used for equidistant cutting of the insulated cable, the right hand holds the pressing rod 6 to press down, the cable is rolled by the left hand under the vertical pressing of the two blades 13, and the equidistant cutting of the insulation shrinkage sample is completed once. The insulation of the middle section is reserved, the rest insulation is stripped to expose the conductor, marking lines are respectively arranged at the left and right positions of 3mm, the distance between the measured marks accords with L 0 (generally L 0 =200 mm) in the test standard, and the test is carried out in an oven. After the test is finished, the insulation contraction length L is measured, and the cable contraction rate DeltaL= (L-L 0)/ L0 multiplied by 100 percent) is calculated to verify whether the cable contraction test is qualified or not.
In the present invention, unless explicitly specified and defined otherwise, for example, it may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (5)
1. Equidistant system appearance device of cable shrinkage test, its characterized in that: the cable cutting device comprises a base (1), wherein a tool rest stand column (3), a pressure lever support column (4) and a cable clamping rod (5) are fixedly connected to the upper surface of the base (1) respectively, the tool rest stand column (3) is composed of two guide posts penetrating through springs (7), a beam tool rest (8) which is in sliding connection with the guide posts is arranged above the springs (7), positioning nuts (10) are connected to the top ends of the guide posts in a threaded manner, blades (13) for cutting cables are arranged on two sides of the lower surface of the beam tool rest (8), a pressure lever (6) for pressing the beam tool rest (8) is hinged to the top ends of the pressure lever support column (4), and the pressure lever (6) is located above the beam tool rest (8); one end of the lower surface of the beam tool rest (8) is welded with a fixed tool holder (11), the other end of the beam tool rest (8) is provided with a square hole with the length of 10mm-15mm, the movable tool holder (12) is connected below the beam tool rest (8) through a set screw arranged in the square hole, and the fixed tool holder (11) and the movable tool holder (12) are both connected with a blade (13) through bolts; the cable clamping rods (5) are two groups of steel rods welded on the base (1) and right below the fixed cutter holder (11) and the movable cutter holder (12), each group is provided with two steel rods for limiting the cable, the length of each steel rod is 10-20 mm, and the steel rods are parallel to the upper beam cutter rest (8); the steel sticks are round, the two round steel sticks can just fix the cable, and when the cable test sample is cut in a circular manner by pulling fingers, the insulating tangential plane of the cable is vertical and level.
2. The equidistant sample preparation device for cable shrinkage test of claim 1, wherein: the upper end of the guide rod is provided with a fixed cover plate (9), and the fixed cover plate (9) is fixed on the guide rod through a positioning nut (10).
3. The equidistant sample preparation device for cable shrinkage test of claim 2, wherein: the compression bar support column (4) is a square steel column.
4. A cable shrinkage test equidistant sampling device as defined in claim 3, wherein: the compression bar (6) is wave-shaped, the compression bar (6) is provided with a section of straight bar handle, and the valley point of the compression bar (6) is propped against the beam tool rest (8).
5. The equidistant sample preparation device for cable shrinkage test as defined in any one of claims 1-4, wherein: the base (1) is made of steel plates, and a handle (2) is fixedly connected to the side wall of the base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111668356.9A CN114309360B (en) | 2021-12-31 | 2021-12-31 | Equidistant sample preparation device for cable shrinkage test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111668356.9A CN114309360B (en) | 2021-12-31 | 2021-12-31 | Equidistant sample preparation device for cable shrinkage test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114309360A CN114309360A (en) | 2022-04-12 |
| CN114309360B true CN114309360B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111668356.9A Active CN114309360B (en) | 2021-12-31 | 2021-12-31 | Equidistant sample preparation device for cable shrinkage test |
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| Country | Link |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924503A1 (en) * | 1997-12-19 | 1999-06-23 | Anton Meyer & Co.AG | A device for use in an ultramicrotome |
| CN101225597A (en) * | 2008-02-13 | 2008-07-23 | 中国农业科学院兰州畜牧与兽药研究所 | Floccus sectionalized sample cutting instrument |
| CN203019433U (en) * | 2013-01-24 | 2013-06-26 | 王桂玲 | Cutter adjustable in length |
| CN206898279U (en) * | 2017-04-01 | 2018-01-19 | 中广核研究院有限公司北京分公司 | Patch chip pin shearing device |
| CN109047591A (en) * | 2018-09-27 | 2018-12-21 | 吴江市凯宝电器有限公司 | A kind of data line fixed-length cutting device |
| CN210487303U (en) * | 2019-08-26 | 2020-05-08 | 陕西工业职业技术学院 | Physical and chemical detection sampling device |
| CN211527865U (en) * | 2019-10-25 | 2020-09-18 | 河北泉恩高科技管业有限公司 | Polyolefin plastic DSC detects sampling device |
| CN213559645U (en) * | 2020-09-02 | 2021-06-29 | 吴迪 | Civil engineering construction is with high-efficient reinforcing bar cutting equipment |
-
2021
- 2021-12-31 CN CN202111668356.9A patent/CN114309360B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924503A1 (en) * | 1997-12-19 | 1999-06-23 | Anton Meyer & Co.AG | A device for use in an ultramicrotome |
| CN101225597A (en) * | 2008-02-13 | 2008-07-23 | 中国农业科学院兰州畜牧与兽药研究所 | Floccus sectionalized sample cutting instrument |
| CN203019433U (en) * | 2013-01-24 | 2013-06-26 | 王桂玲 | Cutter adjustable in length |
| CN206898279U (en) * | 2017-04-01 | 2018-01-19 | 中广核研究院有限公司北京分公司 | Patch chip pin shearing device |
| CN109047591A (en) * | 2018-09-27 | 2018-12-21 | 吴江市凯宝电器有限公司 | A kind of data line fixed-length cutting device |
| CN210487303U (en) * | 2019-08-26 | 2020-05-08 | 陕西工业职业技术学院 | Physical and chemical detection sampling device |
| CN211527865U (en) * | 2019-10-25 | 2020-09-18 | 河北泉恩高科技管业有限公司 | Polyolefin plastic DSC detects sampling device |
| CN213559645U (en) * | 2020-09-02 | 2021-06-29 | 吴迪 | Civil engineering construction is with high-efficient reinforcing bar cutting equipment |
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| CN114309360A (en) | 2022-04-12 |
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