CN113036708A

CN113036708A - Cable anti-twisting protection device

Info

Publication number: CN113036708A
Application number: CN202110279421.2A
Authority: CN
Inventors: 侯彬彬; 谢明亮; 冯学斌; 彭超义; 姚运帅; 廖志勇; 严煜坤; 黎缘
Original assignee: Zhuzhou Times New Material Technology Co Ltd
Current assignee: Zhuzhou Times New Material Technology Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-06-25

Abstract

The invention relates to the field of cable protection, in particular to a cable anti-twisting protection device which comprises a drag chain and a plurality of stress relief assemblies, wherein the drag chain is positioned in the stress relief assemblies and is contacted with the stress relief assemblies, and the drag chain is formed by sequentially connecting a plurality of hollow chain links. The invention has the advantages that the cable can be arranged in the drag chain in a binding belt, hand pasting and other modes, so that the cable and the drag chain cannot slide relatively, the cable is prevented from being damaged, the cable has enough moving space in the drag chain and cannot be locked, the problem of abrasion of the outer skin of the cable during relative twisting can be solved, the cable can also transmit torsion to the drag chain, the drag chain transmits the torsion to the stress removing assembly, and the stress removing assembly can remove a part of the torsion, so that the torsion borne by the cable is reduced, the twisting damage of the blade in the variable pitch process is reduced, and the influence of the variable pitch action on the cable is reduced.

Description

Cable anti-twisting protection device

Technical Field

The invention relates to the field of cable protection, in particular to a cable anti-twisting protection device.

Background

According to the existing deicing scheme of the wind generating set, no matter the electrothermal deicing scheme that an electrothermal element is embedded into a blade body or the gas-heated deicing scheme of heating and blowing circulation is adopted, a cable for providing a power supply for a system or a sensing cable for providing control for the system is arranged inside the blade, and the cable needs to be arranged from the inside of the blade and is routed to a slip ring through a hub. Can produce relative rotation in order to satisfy the blade and become the oar operation between blade and wheel hub usually, when the unit becomes the oar action, the relative wheel hub rotation of blade is 0 ~ 90, if the cable adopts the fixed mode of laying, becomes the oar action and can cause the damage to the cable, and the wearing and tearing skin will appear in the cable after long-term operation, causes wheel hub equipment to damage even after twisting off, not only influences deicing system and normally starts, also probably has the risk that the cable of twist off causes other equipment in the wheel hub to drop simultaneously. It is therefore necessary to design a reliable anti-twisting structure to reduce the effect of the pitching action on the cables. If the cable is not protected by a corresponding anti-twist device,

disclosure of Invention

The invention aims to solve the technical problem that the cable is damaged by the variable pitch action, and provides a cable anti-twisting protection device which can reduce the influence of the variable pitch action on the cable.

The invention relates to a cable twisting-prevention protection device which comprises a drag chain and a plurality of stress relief assemblies, wherein the drag chain is positioned in the stress relief assemblies and is contacted with the stress relief assemblies, and the drag chain is formed by sequentially connecting a plurality of hollow chain links.

Further, the chain link have the mounting panel, the mounting panel has first mounting panel and second mounting panel, first mounting panel can peg graft with adjacent second mounting panel.

Furthermore, the number of the mounting plates is two, and the two mounting plates are arc-shaped plates with opposite openings.

Furthermore, a connecting frame is arranged in the chain link.

Furthermore, one side of link set up the connecting plate, set up the spread groove on the connecting plate, the fixed slot is seted up to the opposite side of link, sets up the connecting block in the fixed slot, the connecting plate is located the fixed slot of adjacent link, the connecting block is located the spread groove of adjacent link.

Furthermore, an avoiding groove is formed in the side portion of the connecting frame.

Furthermore, the connecting frame is provided with lightening holes.

Further, the subassembly that goes to stress on set up the through-hole, the tow chain is located the through-hole, has first retaining member and second retaining member, one side of first retaining member and one side of second retaining member are articulated, the opposite side of first retaining member and the opposite side of second retaining member set up the buckle, the lateral part of first retaining member and second retaining member all sets up the fixed block, the fixed block is located the through-hole border, the tow chain touches with the fixed block mutually.

Furthermore, a connecting hole is formed in the stress removing assembly.

Further, still include first mounting bracket and second mounting bracket, the several destressing subassembly is installed respectively on first mounting bracket and second mounting bracket.

The invention has the advantages that the cable can be arranged in the drag chain in a binding belt, hand pasting and other modes, so that the cable and the drag chain cannot slide relatively, the cable is prevented from being damaged, the cable has enough moving space in the drag chain and cannot be locked, the problem of abrasion of the outer skin of the cable during relative twisting can be solved, the cable can also transmit torsion to the drag chain, the drag chain transmits the torsion to the stress removing assembly, and the stress removing assembly can remove a part of the torsion, so that the torsion borne by the cable is reduced, the twisting damage of the blade in the variable pitch process is reduced, and the influence of the variable pitch action on the cable is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of a link of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is a schematic view of several link connections;

FIG. 6 is a schematic structural view of a stress relief assembly of the present invention;

FIG. 7 is a front view of the stress relief assembly of the present invention;

FIG. 8 is a schematic structural view of a first mount of the present invention;

fig. 9 is a schematic structural view of a second mount according to the present invention.

In the figure, the towing chain 1, the towing chain 2, the stress relieving assembly 3, the first mounting frame 4, the second mounting frame 11, the first mounting plate 12, the second mounting plate 13, the connecting frame 14, the connecting plate 15, the connecting groove 16, the fixing groove 17, the connecting block 18, the avoiding groove 19, the lightening hole 21, the first locking piece 22, the second locking piece 23, the fixing block 24, the buckle 25 and the connecting hole are arranged.

Detailed Description

As shown in the attached drawing 1, the cable anti-twisting protection device comprises a drag chain 1 and a plurality of stress relief assemblies 2, wherein the drag chain 1 is positioned in the stress relief assemblies 2 and is in contact with the stress relief assemblies 2, and the drag chain 1 is formed by sequentially connecting a plurality of hollow chain links. Generating set is at the operation in-process, the blade is heavy reopening oar and receipts oar action frequently for satisfying electricity generation or safe demand, when blade and wheel hub take place relative motion, it is static for the reference to assume wheel hub, the cable also receives torsion when the blade twists clockwise, the cable accessible ribbon, the inside at tow chain 1 is installed to mode such as hand is pasted, make can not take place relative slip between the two, avoid destroying the cable, the cable has sufficient activity space in tow chain 1, can not die, can solve the wearing and tearing problem of the crust of cable when relative wrench movement, the cable can also transmit torsion for tow chain 1, tow chain 1 transmits torsion for destressing subassembly 2, destressing subassembly 2 can unload partly torsion, thereby the torsion that the reduction cable received, thereby the twist injury of blade change oar process has been subdued, the influence of changing oar action to the cable is reduced. The stress relieving component 2 is a joint component, can be arranged at two ends of the stroke of the drag chain 1, can also be arranged at intervals along the length direction of the drag chain 1, can realize extremely sensitive bending, and can automatically unload force once the cable is twisted.

As shown in fig. 2 to 5, the chain link has mounting plates, which have a first mounting plate 11 and a second mounting plate 12, the first mounting plate 11 being capable of being plugged into the adjacent second mounting plate 12. This kind of structure makes several chain link can peg graft in proper order through first mounting panel 11 and second mounting panel 12 for 1 length of tow chain that constitutes after the several chain link is connected can be adjusted according to the application scene, increases and decreases wantonly according to actual demand, has reduced the degree of difficulty of engineering construction, and the connection of adjacent chain link is still convenient for to this kind of structure, thereby realizes the quick packing of many specification and dimension pipelines.

As shown in fig. 2-5, the two mounting plates are arc plates with opposite openings. The curved mounting plates allow the first mounting plate 11 and the second mounting plate 12 to rotate relative to each other, thereby allowing a portion of the torque to be removed.

As shown in fig. 2-5, a connecting frame 13 is provided in the chain link. The connecting frame 13 not only can play a role in fixing and supporting the chain link, but also can divide the inside of the chain link into two parts, so that when the cable and the sensing cable are simultaneously installed in the chain link, the cable and the sensing cable are prevented from being wound and knotted.

As shown in fig. 2-5, a connecting plate 14 is disposed on one side of the connecting frame 13, a connecting groove 15 is disposed on the connecting plate 14, a fixing groove 16 is disposed on the other side of the connecting frame 13, a connecting block 17 is disposed in the fixing groove 16, the connecting plate 14 is disposed in the fixing groove 16 of the adjacent connecting frame 13, and the connecting block 17 is disposed in the connecting groove 15 of the adjacent connecting frame 13.

As shown in fig. 2, the side of the connecting frame 13 is provided with an avoiding groove 18. The avoiding groove 18 can avoid the connecting block 17, and a gap exists between the connecting parts of the adjacent chain links, so that the adjacent chain links can rotate relatively, the torsion angle of the drag chain 1 is increased along with the chain links, the torsion angle of the drag chain can reach 180 degrees when the length of the drag chain is 200mm, and a part of torsion force can be removed.

As shown in fig. 2, the connecting frame 13 is provided with lightening holes 19. The lightening holes 19 can effectively reduce the dead weight and facilitate the transmission of torsion.

As shown in the accompanying drawings 6 and 7, the stress removing assembly 2 is provided with a through hole, the drag chain 1 is arranged in the through hole, the first locking piece 21 and the second locking piece 22 are arranged, one side of the first locking piece 21 is hinged to one side of the second locking piece 22, the other side of the first locking piece 21 and the other side of the second locking piece 22 are provided with a buckle 24, the lateral parts of the first locking piece 21 and the second locking piece 22 are provided with a fixing block 23, the fixing block 23 is arranged on the periphery of the through hole, and the drag chain 1 is contacted with the fixing block 23. This configuration can facilitate the opening and closing of the stress relief assembly 2, facilitating the installation of the tow chain 1 within the stress relief assembly 2.

As shown in fig. 6 and 7, the stress relieving assembly 2 is provided with a connecting hole 25. This configuration can facilitate the attachment of the destressing assembly 2 to other components via the attachment holes 25, facilitating the attachment of the destressing assembly 2.

As shown in fig. 8 and 9, the stress-relief assembly further comprises a first mounting frame 3 and a second mounting frame 4, and a plurality of stress-relief assemblies 2 are respectively mounted on the first mounting frame 3 and the second mounting frame 4. The first mounting frame 3 is mounted on the wind power blade, and the second mounting frame 4 is mounted on the unit hub. The first mounting frame 3 and the second mounting frame 4 may be provided with mounting holes and/or with connectors for connecting to the stress relief assembly 2. The cable can be coaxial with the blade and the hub through the first mounting frame 3 and the second mounting frame 4, and the phenomenon that an inner core of the cable is twisted or twisted due to eccentric rotation can be prevented to the maximum extent. The first mounting rack 3 and the second mounting rack 4 can be automatically adjusted and designed according to the actual measurement distance, the flexibility is high, the concentricity can be guaranteed to the maximum extent, and the twisting prevention effect is achieved

First mounting bracket 3 is welded structure, and first mounting bracket 3 has first base, montant and first footstock, and on first base was fixed in the blade body through the technique of pasting the bonding by hand, first base cut hole was handled so that bonding strength promoted, and the cable was binded on the montant through the ribbon, installs destressing subassembly 2 on the first footstock. Second mounting bracket 4 is welded structure, and second mounting bracket 4 has second base, L type pole and second footstock, and the second base passes through the bolt fastening on the wheel hub foundry goods, and the moment value should satisfy the standard requirement value, installs destressing subassembly 2 on the second footstock, sets up tow chain 1 between the destressing subassembly 2 on first footstock and the second footstock, and the cable passes tow chain 1. The drag chain 1 is a universal module consisting of easily detachable and rotatably supported links, which can be quickly mounted on the de-stressing assembly 2. The chain link is a buckle formula structure that adopts the ball groove design principle, and length and size can be prolonged, reduce and replace according to the application scene, and the structure of easily opening of chain link can realize that many specification and dimension pipelines fill fast, and the torsion angle of every chain link can reach 10, and the torsion angle of tow chain 1 increases along with the chain link and grow. The stress relief assembly 2 is a joint assembly and can be arranged at two ends of the stroke of the drag chain 1, extremely sensitive bending can be realized, and once the cable is twisted, the force can be automatically relieved. The cable includes signal cable and power cable, the conductor of two kinds of cables can adopt the meticulous naked copper stranded conductor of high flexibility to the line, applicable in small-size model unit, the cable can realize the effect of cable protection in short distance torsion range, the shielding layer adopts the high bending resistance tinned copper wire weaving structure that the coverage exceeds 70%, resistant bending characteristic satisfies when bend radius is greater than 7.5D under 15 ℃ and bend radius is greater than 10D fatigue number of times under 25 ℃ below all be greater than 500 ten thousand, the oversheath adopts PUR TPE material. The cable connection de-icing arrangement is arranged inside the tow chain. The ribbon is a special binding ribbon for low-temperature wind power and is used for fixing cables and assemblies. The distance between the first mounting frame 3 and the second mounting frame 4 is 200-500 mm; the axis offset is less than 50mm after installation; the bending radius of the machine joint is more than 110 mm; the fixed length of the two ends of the cable is more than 1 m; the suspension length of the drag chain 1 is less than 500 mm; the suspension length of the cable is less than 200 mm; the section of the cable which is not protected by the drag chain needs to be protected by a corrugated pipe; the first mounting frame 3 and the second mounting frame 4 are designed in a light weight mode, and the contact part of the first mounting frame and the second mounting frame with the cable is not provided with sharp edges; the first mounting bracket 3 and the second mounting bracket 4 reserve the position of a cable tie or other means for fixing the cable.

Claims

1. Protection device is prevented turning round by cable, its characterized in that: the chain type traction device comprises a drag chain (1) and a plurality of destressing assemblies (2), wherein the drag chain (1) is positioned in the destressing assemblies (2) and is in contact with the destressing assemblies (2), and the drag chain (1) is formed by sequentially connecting a plurality of hollow chain links.

2. The cable twist-proof protection device of claim 1, wherein: the chain link have the mounting panel, the mounting panel has first mounting panel (11) and second mounting panel (12), first mounting panel (11) can be pegged graft with adjacent second mounting panel (12).

3. The cable twist-proof protection device of claim 2, wherein: the mounting panel be two, two mounting panels are the arc that the opening is relative.

4. The cable twist-proof protection device of claim 1, wherein: a connecting frame (13) is arranged in the chain link.

5. The cable twist-proof protection device of claim 4, wherein: one side of link (13) set up connecting plate (14), set up spread groove (15) on connecting plate (14), fixed slot (16) are seted up to the opposite side of link (13), set up connecting block (17) in fixed slot (16), connecting plate (14) are located fixed slot (16) of adjacent link (13), connecting block (17) are located spread groove (15) of adjacent link (13).

6. The cable twist-proof protection device of claim 5, wherein: an avoiding groove (18) is formed in the side portion of the connecting frame (13).

7. The cable twist-proof protection device of claim 4, wherein: the connecting frame (13) is provided with lightening holes (19).

8. The cable twist-proof protection device of claim 1, wherein: remove on stress component (2) and set up the through-hole, tow chain (1) are located the through-hole, there are first retaining member (21) and second retaining member (22), one side of first retaining member (21) and one side of second retaining member (22) are articulated, the opposite side of first retaining member (21) and the opposite side of second retaining member (22) set up buckle (24), the lateral part of first retaining member (21) and second retaining member (22) all sets up fixed block (23), fixed block (23) are located the through-hole border, tow chain (1) touch with fixed block (23).

9. The cable twist-proof protection device of claim 8, wherein: and the stress removing component (2) is provided with a connecting hole (25).

10. The cable twist-proof protection device of any one of claims 1-9, wherein: the stress relieving assembly is characterized by further comprising a first mounting frame (3) and a second mounting frame (4), and the plurality of stress relieving assemblies (2) are respectively mounted on the first mounting frame (3) and the second mounting frame (4).