CN110132721B - Stretching device and method for optical fiber composite low-voltage cable - Google Patents
Stretching device and method for optical fiber composite low-voltage cable Download PDFInfo
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- CN110132721B CN110132721B CN201910543906.0A CN201910543906A CN110132721B CN 110132721 B CN110132721 B CN 110132721B CN 201910543906 A CN201910543906 A CN 201910543906A CN 110132721 B CN110132721 B CN 110132721B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 76
- 239000002131 composite material Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000011241 protective layer Substances 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims description 44
- 238000009434 installation Methods 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention relates to a stretching device and a method for an optical fiber composite low-voltage cable, which can ensure the integrity of the optical fiber composite low-voltage cable while stretching, wherein the stretching device comprises a protective layer coated on the optical fiber composite low-voltage cable, a first stretching belt, a second stretching belt and a connecting component, the first stretching belt comprises a first clamping section spirally wound on the outermost protective layer, and a first tension section connected with the connecting component, and the second stretching belt comprises a second clamping section spirally wound on the first clamping section and a second tension section connected with the connecting component; friction contact is formed between the protective layer and the optical fiber composite cable, between the protective layer and the first clamping section, and between the first clamping section and the second clamping section; the first tension section and the second tension section are symmetrically positioned at two sides of the straightened optical fiber composite cable, and an included angle between the first tension section and the optical fiber composite cable is larger than 0 DEG and smaller than 90 deg.
Description
Technical Field
The invention relates to the field of cable detection, in particular to a stretching device and a stretching method for an optical fiber composite low-voltage cable.
Background
An optical fiber composite low-voltage cable (OPLC for short) is a cable which is formed by compositing a low-voltage cable and an optical transmission unit and has the dual functions of a low-voltage power cable and a communication optical cable. Under the policy background of strategic development of new energy, new generation information technology and other strategic emerging industries, the inherent requirements of smart grid construction and the necessary trend of information communication industry development bring unprecedented development opportunities for fiber to the home. The optical fiber composite low-voltage cable (combining optical fibers in a low-voltage power cable structural layer to realize simultaneous entry of power lines and optical fibers) provides an ideal solution for solving the communication problem in the power distribution and utilization field. By adopting the optical fiber composite low-voltage cable, the purpose of energy information synchronization is achieved, and two industries of electric power and information communication are integrated, integrated and complemented, so that power can be supplied, and the information problem of the last hundred meters of a power grid can be thoroughly solved.
Tensile property testing is an important test item for OPLC detection. Compared with the condition that tension can be applied only by installing closed connecting terminals at two ends of a common power cable after the cable is cut off, the OPLC has to ensure the integrity of a cable body in an access section of a photoelectric testing instrument in a tensile test. At present, no mature solution exists, so that the OPLC can be applied with larger tension, and the performance of a photoelectric unit part in the cable can be monitored at the same time.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a stretching device and a method for an optical fiber composite low-voltage cable, which can stably and effectively stretch the optical fiber composite low-voltage cable while maintaining the integrity of the optical fiber composite low-voltage cable.
In order to achieve the above object, the present invention provides a stretching device for an optical fiber composite low voltage cable, for being mounted on a straightened optical fiber composite low voltage cable, comprising a protective layer covering the optical fiber composite low voltage cable, a first stretching strap, a second stretching strap, and a connecting component, wherein the first stretching strap comprises a first clamping section spirally wound on an outermost protective layer, and a first tension section connected with the connecting component, and the second stretching strap comprises a second clamping section spirally wound on the first clamping section, and a second tension section connected with the connecting component; friction contact is formed between the protective layer and the optical fiber composite cable, between the protective layer and the first clamping section, and between the first clamping section and the second clamping section; the first tension section and the second tension section are symmetrically positioned at two sides of the straightened optical fiber composite cable, and an included angle between the first tension section and the optical fiber composite cable is larger than 0 DEG and smaller than 90 deg.
Further, the protective layer is formed by spirally winding a belt-shaped protective belt around the optical fiber composite low-voltage cable
Further, the protective belt is a wire belt formed by connecting a plurality of wires in parallel.
Further, the first stretching strap and the second stretching strap are both wire straps formed by connecting a plurality of wires in parallel.
Further, the first and second clamping sections are each preformed helical structures.
Further, the first tension section of the first stretching strap is U-shaped, the first clamping sections are two and are respectively connected to two ends of the first tension section of the U-shaped, and the two first clamping sections are spirally wound on the protective layer at intervals.
Further, the second tension section of the second stretching strap is U-shaped, the second clamping sections are two and are respectively connected to two ends of the second tension section of the U-shaped, and the two second clamping sections are spirally wound on the first clamping section at intervals.
Further, the connecting assembly comprises an isosceles triangle connecting plate, the first tension section and the second tension section are respectively connected at two equal bottom corners of the isosceles triangle connecting plate, and the vertex angle of the isosceles triangle connecting plate is used for applying tension.
Further, the connecting assembly further comprises two connecting shackles which are respectively connected to two equal base angles of the isosceles triangle connecting plate, and the first tension section and the second tension section are respectively connected with the two connecting shackles.
The invention also provides a stretching method for the optical fiber composite low-voltage cable, which is carried out by adopting the stretching device and comprises the following steps:
s1, selecting a section on an optical fiber composite low-voltage cable as a cable detection section, and straightening the cable detection section;
S2, respectively installing one stretching device at two ends of the cable detection section, wherein after the installation is completed, the connecting assemblies of the two stretching devices face opposite directions and face directions away from the cable detection section;
And S3, simultaneously applying a pulling force along the axis of the cable detection section to the two connecting assemblies, wherein the two pulling forces are opposite in direction and are both directed away from the cable detection section.
As described above, the stretching apparatus and method according to the present invention have the following advantageous effects:
Through setting up protective layer, first stretching strap, second stretching strap, and coupling assembling, select one section as the cable detection section on the compound low tension cable of optic fibre, the cable detection section keeps straightening, install a stretching device respectively at the both ends of cable detection section, exert pulling force F1 to first pulling force section simultaneously through coupling assembling, and exert pulling force to second pulling force section, because the direction of pulling force F1 and F2 is not along the axis direction of cable detection section, and first clamping section and second clamping section are the mode of spiral winding, second clamping section can tighten up further and tighten up on first clamping section under the effect of pulling force F1, first clamping section can tighten up further on the protective layer under the effect of pulling force, have great frictional force between protective layer and the cable detection section surface, and under the combined action of pulling force F1 and F2, the protective layer exerts the force along cable detection section axis, thereby realize the tensile to cable detection section. The tensile performance test is carried out on the cable detection section, the structure of the optical fiber composite low-voltage cable is not required to be damaged, the integrity of the optical fiber composite low-voltage cable is guaranteed, and the photoelectric unit of the optical fiber composite low-voltage cable can be directly connected into a photoelectric test instrument, so that the optical fiber performance and the electrical performance of the optical fiber composite low-voltage cable in a stressed tensile state are monitored.
Drawings
Fig. 1 is a schematic structural view of a stretching apparatus in the present invention.
Fig. 2 is a bottom view of fig. 1.
Fig. 3 is a schematic structural diagram of the protective layer before installation.
Fig. 4 is a schematic view of the structure of the first stretching strap of the present invention before installation.
Fig. 5 is a schematic view of the structure of the second stretching strap of the present invention before installation.
Fig. 6 is a schematic operation diagram of the stretching apparatus of the present invention.
Description of element reference numerals
1. Optical fiber composite low-voltage cable
11. Cable detection section
2. Protective layer
3. First stretching strap
31. A first clamping section
32. First tension section
4. Second stretching strap
41. A second clamping section
42. Second tension section
5. Connection assembly
51. Isosceles triangle connecting plate
52. Connecting shackle
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the invention, and the relative changes or modifications are not to be construed as essential to the scope of the invention.
Referring to fig. 1 to 6, the present invention provides a stretching apparatus for an optical fiber composite low voltage cable, for being mounted on a straightened optical fiber composite low voltage cable 1, comprising a protective layer 2 coated on the optical fiber composite low voltage cable 1, a first stretching strap 3, a second stretching strap 4, and a connection member 5, the first stretching strap 3 comprising a first clamping section 31 spirally wound on the outermost protective layer 2, and a first tension section 32 connected to the connection member 5, the second stretching strap 4 comprising a second clamping section 41 spirally wound on the first clamping section 31, and a second tension section 42 connected to the connection member 5; friction contact is formed between the protective layer 2 and the optical fiber composite cable 1, between the protective layer 2 and the first clamping section 31, and between the first clamping section 31 and the second clamping section 41; the first tension section 32 and the second tension section 42 are symmetrically located at two sides of the straightened optical fiber composite low voltage cable 1, and an included angle between the first tension section 32 and the optical fiber composite low voltage cable 1 is larger than 0 degrees and smaller than 90 degrees. Specifically, the thickness of the protective layer 2 may be determined according to practical needs, and the protective layer 2 may be one or more layers, and when multiple layers are adopted, the adjacent protective layers 2 are in friction contact. The number of windings and the winding length of the first clamping section 31 and the second clamping section 41 can be determined according to actual needs, the first clamping section 31 applies a certain clamping force to the protective layer 2, and the second clamping section 41 applies a certain clamping force to the first clamping section 31. The friction coefficient between the protective layer 2 and the optical fiber composite cable 1, the friction coefficient between the protective layer 2 and the inner side surface of the first clamping section 31, and the friction coefficient between the outer side surface of the first clamping section 31 and the inner side surface of the second clamping section 41 can be selected according to actual needs, so that enough friction force can be provided, meanwhile, relative sliding is avoided, and an included angle theta between the first tension section 32 and the optical fiber composite cable 1 is between 0 and 90 degrees according to actual needs.
The working principle of the stretching device related by the invention is as follows: a section is selected as a cable detection section 11 on the optical fiber composite cable 1, the cable detection section 11 is kept to be straightened, two ends of the cable detection section 11 are respectively provided with a stretching device, and the stretching device is arranged in the following way: coating the protective layer 2 on the optical fiber composite cable 1; spirally winding a first clamping section 31 of the first tension band3 on the outermost protective layer 2, the first tension section 32 being connected to the connecting assembly 5; the first clamping section 31 of the second tension band4 is wound spirally around the outer side of the first clamping section 31 and the second tension section 42 is connected to the connecting assembly 5. After the installation, the first tension section 32 and the second tension section 42 are symmetrical with respect to the cable test section 11, and the connection assemblies 5 of the two stretching devices are opposite and both directed away from the cable test section 11. Simultaneously, a pulling force F is respectively applied to the two connecting components 5 along the axis of the cable detecting section 11, the directions of the two pulling forces F are opposite and are far away from the cable detecting section 11, so that under the action of the pulling force F, the pulling force F1 is simultaneously applied to the first pulling force section 32 and the pulling force F2 is simultaneously applied to the second pulling force section 42 by the connecting components 5, as the directions of the pulling forces F1 and F2 are not along the axis direction of the cable detecting section 11, the first clamping section 31 and the second clamping section 41 are in a spiral winding mode, the second clamping section 41 can be tightened to be further tightened on the first clamping section 31 under the action of the pulling force F2, the first clamping section 31 can be tightened to be further tightened on the protective layer 2 under the action of the pulling force F1, a large pressure is arranged between the protective layer 2 and the outer surface of the cable detecting section 11, and under the combined action of the pulling forces F1 and F2, the protective layer 2 applies a friction force along the axis of the cable detecting section 11 to the cable detecting section 11, so that the cable detecting section 11 is stretched, and the first clamping section 31 can be tightened to prevent the first clamping section 31 from being damaged due to the low-voltage composite fiber 1 in the process. The tensile property test was performed on the cable test section 11 by the tensile action of the tensile devices at both ends of the cable test section 11. The stretching device can apply a large stretching force to the optical fiber composite low-voltage cable 1, and the stretching effect of the stretching device on the cable detection section 11 is uniform and stable, so that the optical fiber composite low-voltage cable 1 is not easy to slip when being subjected to a relatively stretching force.
By adopting the stretching device, the length of the cable detection section 11 for the test is not limited by adopting a mode of directly coating the optical fiber composite low-voltage cable 1, the structure of the optical fiber composite low-voltage cable 1 is not required to be damaged, the integrity of the optical fiber composite low-voltage cable 1 is ensured, the stretching to which the cable detection section 11 is subjected is uniform and stable, and the effect of the stretching performance test is ensured. Because the closed wiring terminal is not required to be installed, the optical fiber composite low-voltage cable 1 is not required to be damaged, and the photoelectric unit of the optical fiber composite low-voltage cable 1 can be directly connected into a photoelectric testing instrument, so that the optical fiber performance and the electrical performance of the optical fiber composite low-voltage cable 1 in a stressed and stretched state are monitored, and the accurate detection of the performance of the optical fiber composite low-voltage cable 1 is realized.
The stretching device of the present invention may be provided with a plurality of stretching belts, for example, a third stretching belt, a fourth stretching belt, etc. may be further provided on the basis of the first stretching belt 3 and the second stretching belt 4, the stretching belts have the same working principle, specifically, the number of the stretching belts used may be determined according to the actual stretching needs, and two or more stretching belts may be provided to stretch based on the same principle, and the present invention is also included in the protection scope of the present invention.
In the present invention, the material of the protective layer 2 may be selected according to actual needs, ensuring a certain strength and a sufficient friction force with the optical fiber composite low voltage cable 1 and with the second clamping section 41. In the preferred embodiment, the protective layer 2 is formed by spirally winding a belt-shaped protective belt around the optical fiber composite low-voltage cable 1, so that the installation is convenient, the protective belt is preferably a metal wire belt formed by connecting a plurality of metal wires in parallel, and the metal wire belt is prefabricated into a spiral structure before installation, as shown in fig. 3, so that the on-site installation is convenient. The protective layer 2, which is formed by spirally winding the wire ribbon, has a sufficient mechanical strength to resist extrusion while having a sufficient coefficient of friction between the two sides of the wire ribbon and the optical fiber composite cable 1 and the second clamping section 41.
As a preferred design, as shown in fig. 1, 2, 4 and 5, the first stretching strap 3 and the second stretching strap 4 are both wire straps formed by connecting a plurality of wires in parallel, so as to ensure sufficient mechanical strength, withstand sufficient extrusion force and stretching, and have sufficient friction force. Before installation, the first clamping section 31 and the second clamping section 41 are both preformed helical structures, facilitating field installation.
As shown in fig. 1, 2 and 4, the first tension section 32 of the first stretching strap 3 is U-shaped, the first clamping sections 31 are two, respectively connected to two ends of the U-shaped first tension section 32, and the two first clamping sections 31 are spirally wound on the protective layer 2 at intervals. When in use, the bending part of the U-shaped first tension section 32 is used for penetrating through the connecting component 5 to connect, as shown in fig. 1 and 2, so that the connecting component 5 can conveniently apply tension to the first tension section 32, and meanwhile, the two first clamping sections 31 are spirally wound on the protective layer 2 at intervals, so that the friction force between the first stretching strap 3 and the protective layer 2 can be further ensured. Similarly, as shown in fig. 4 and 5, the second stretching strap 4 is designed in the same manner as the first stretching strap 3, that is, the second tension section 42 is U-shaped, the second clamping sections 41 are two, and are respectively connected to two ends of the U-shaped second tension section 42, and the two second clamping sections 41 are spirally wound on the first clamping section 31 at intervals, so that the principle and effect are the same as those of the first stretching strap 3.
As a preferred design, as shown in fig. 1 and 2, the connection assembly 5 comprises an isosceles triangle connection plate 51, and two connection shackles 52 respectively connected at two equal bottom corners of the isosceles triangle connection plate 51, the first tension section 32 and the second tension section 42 are respectively connected with the two connection shackles 52, and the top corners of the isosceles triangle connection plate 51 are used for applying tension. Specifically, in the present embodiment, as shown in fig. 1 and 2, when the connection shackle 52 is installed, the connection is performed through the bent portion of the U-shaped second tension section 42, the installation is convenient, and a long contact surface is provided between the second tension section 42 and the connection shackle 52, so that sufficient tension can be transmitted between the first tension section 32 and the connection shackle 52. Similarly, sufficient tension can be transferred between the U-shaped first tension leg 32 and the connecting shackle 52. Moreover, by adopting the design mode of the isosceles triangle connecting plate 51, when tension is applied to the vertex angle of the isosceles triangle connecting plate 51, the isosceles triangle connecting plate 51 simultaneously applies equal tension to the first tension section 32 and the second tension section 42 through the connecting shackle 52, and ensures that the first tension section 32 and the second tension section 42 are symmetrically positioned on two sides of the cable detection section 11, and ensures that the cable detection section 11 is uniformly and stably stretched.
Referring to fig. 1,2 and 6, the present invention also provides a drawing method for an optical fiber composite low voltage cable, which is performed by using the drawing device, and includes the following steps:
S1, selecting a section on an optical fiber composite cable 1 as a cable detection section 11, and straightening the cable detection section 11; no influence is exerted on the other parts of the optical fiber composite cable 1 than the cable detection section 11,
S2, respectively installing one stretching device at two ends of the cable detection section 11, wherein after the installation is finished, the connecting assemblies 5 of the two stretching devices face opposite directions and are both far away from the cable detection section 11, and the drawing is shown in reference to FIG. 6;
When the stretching device in the embodiment is adopted, the method for installing the stretching device specifically comprises the following steps: spirally winding a metal wire belt on the optical fiber composite low-voltage cable 1 to form a protective layer 2; the two first clamping sections 31 of the first stretching strap 3 are spirally wound on the protective layer 2 alternately and clamped, and the first tension section 32 is connected with one connecting shackle 52 of the connecting assembly 5; the two second clamping sections 41 of the second stretching strap 4 are spirally wound on the outer side surface of the first clamping section 31 alternately and clamped, the second tension section 42 is connected with the other connecting shackle 52 of the connecting assembly 5, after the two stretching devices are installed at the two ends of the cable detection section 11, the isosceles triangle connecting plate 51 is symmetrical with respect to the cable detection section 11, and the second tension section 42 are straightened and symmetrical with respect to the cable detection section 11, as shown in reference to fig. 1.
S3, referring to fig. 6, a pulling force along the axis of the cable detection section 11 is applied to the two connection assemblies 5 at the same time, and the two pulling forces are opposite in direction and are both directed away from the cable detection section 11. Specifically, when the stretching device in the present embodiment is adopted, a pressure is applied at the apex angle of the isosceles triangle connecting plate 51 of the connecting assembly 5, so that the tensile forces received by the first tensile force section 32 and the second tensile force section 42 are ensured to be the same and symmetrical with respect to the axis of the cable detection section 11.
The tensile performance test of the optical fiber composite low-voltage cable 1 was performed by stretching the optical fiber composite low-voltage cable 1 according to the above-described stretching method, and adjusting the magnitude of the tensile force applied to the isosceles triangle connecting plate 51 according to the actual requirement.
From the above, the stretching device in this embodiment has a simple structure and stable and reliable stretching effect on the cable. When the stretching device in the embodiment is used for carrying out the stretching performance test on the optical fiber composite low-voltage cable 1, the optical fiber composite low-voltage cable 1 is not required to be damaged, the integrity of the optical fiber composite low-voltage cable 1 is ensured, the optical fiber performance and the electrical performance of the optical fiber composite low-voltage cable 1 can be monitored while the optical fiber composite low-voltage cable 1 is stretched, and the accuracy of test detection results is ensured.
The drawing device and the method according to the invention can be used for optical fiber composite low-voltage cables 1, but can of course also be applied to a variety of other cables, and are intended to be included in the scope of protection of the invention when applied to other cables on the same principle.
In summary, the invention effectively overcomes the defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (4)
1. The utility model provides a stretching device for compound low-voltage cable of optic fibre for install on the compound low-voltage cable (1) of optic fibre that straightens, its characterized in that: the optical fiber composite low-voltage cable comprises a protective layer (2) coated on the optical fiber composite low-voltage cable (1), a first stretching band (3), a second stretching band (4) and a connecting component (5), wherein the first stretching band (3) comprises a first clamping section (31) spirally wound on the outermost protective layer (2) and a first tension section (32) connected with the connecting component (5), and the second stretching band (4) comprises a second clamping section (41) spirally wound on the first clamping section (31) and a second tension section (42) connected with the connecting component (5); friction contact is formed between the protective layer (2) and the optical fiber composite cable (1), between the protective layer (2) and the first clamping section (31) and between the first clamping section (31) and the second clamping section (41); the first tension section (32) and the second tension section (42) are symmetrically positioned at two sides of the straightened optical fiber composite cable (1), and an included angle between the first tension section (32) and the optical fiber composite cable (1) is larger than 0 degrees and smaller than 90 degrees; the protective layer (2) is formed by spirally winding a belt-shaped protective belt around the optical fiber composite cable (1), and the first clamping section (31) and the second clamping section (41) are of preformed spiral structures; the first tension sections (32) of the first stretching strap (3) are U-shaped, the first clamping sections (31) are two and are respectively connected to two ends of the U-shaped first tension sections (32), and the two first clamping sections (31) are spirally wound on the protective layer (2) at intervals; the second tension sections (42) of the second tension belt (4) are U-shaped, the second clamping sections (41) are two and are respectively connected to two ends of the U-shaped second tension sections (42), and the two second clamping sections (41) are spirally wound on the first clamping section (31) alternately; the connecting assembly (5) comprises an isosceles triangle connecting plate (51), the first tension section (32) and the second tension section (42) are respectively connected to two equal base angles of the isosceles triangle connecting plate (51), the top angle of the isosceles triangle connecting plate (51) is used for applying tension, the connecting assembly (5) further comprises two connecting shackles (52) respectively connected to two equal base angles of the isosceles triangle connecting plate (51), and the first tension section (32) and the second tension section (42) are respectively connected with the two connecting shackles (52).
2. Stretching apparatus as in claim 1, wherein: the protective belt is a metal wire belt formed by connecting a plurality of metal wires in parallel.
3. Stretching apparatus as in claim 1, wherein: the first stretching strap (3) and the second stretching strap (4) are metal wire straps formed by connecting a plurality of metal wires in parallel.
4. A method for stretching an optical fiber composite low-voltage cable, characterized by: the stretching apparatus of claim 1, comprising the steps of:
S1, selecting a section on an optical fiber composite cable (1) as a cable detection section (11), and straightening the cable detection section (11);
s2, respectively installing one stretching device at two ends of the cable detection section (11), wherein after the installation is finished, the connecting assemblies (5) of the two stretching devices face opposite directions and face directions away from the cable detection section (11);
S3, simultaneously applying a pulling force along the axis of the cable detection section (11) to the two connecting assemblies (5), wherein the two pulling forces are opposite in direction and are both directed away from the cable detection section (11).
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| CN201910543906.0A CN110132721B (en) | 2019-06-21 | 2019-06-21 | Stretching device and method for optical fiber composite low-voltage cable |
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| CN201910543906.0A CN110132721B (en) | 2019-06-21 | 2019-06-21 | Stretching device and method for optical fiber composite low-voltage cable |
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| CN110132721B true CN110132721B (en) | 2024-04-30 |
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Address after: 200093 No. 1000, military road, Shanghai, Yangpu District Applicant after: SHANGHAI ELECTRIC CABLE RESEARCH INSTITUTE Co.,Ltd. Applicant after: STATE GRID LIAONING ELECTRIC POWER SUPPLY Co.,Ltd. Applicant after: Shanghai Guoxian Testing Co.,Ltd. Address before: 200093 No. 1000, military road, Shanghai, Yangpu District Applicant before: SHANGHAI ELECTRIC CABLE RESEARCH INSTITUTE Co.,Ltd. Applicant before: STATE GRID LIAONING ELECTRIC POWER SUPPLY Co.,Ltd. Applicant before: SHANGHAI NATIONAL CENTER OF TESTING AND INSPECTION FOR ELECTRIC CABLE AND WIRE Co.,Ltd. |
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