CN114475368A - Pre-twisted wiring system of railway contact net - Google Patents
Pre-twisted wiring system of railway contact net Download PDFInfo
- Publication number
- CN114475368A CN114475368A CN202210165693.4A CN202210165693A CN114475368A CN 114475368 A CN114475368 A CN 114475368A CN 202210165693 A CN202210165693 A CN 202210165693A CN 114475368 A CN114475368 A CN 114475368A
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- power transmission
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- 230000005540 biological transmission Effects 0.000 claims abstract description 76
- 239000000725 suspension Substances 0.000 claims abstract description 29
- 230000007704 transition Effects 0.000 claims description 19
- 239000011295 pitch Substances 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 21
- 239000004020 conductor Substances 0.000 description 13
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 10
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
- B60M1/24—Clamps; Splicers; Anchor tips
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses a pre-twisted wiring system of a railway contact network, which comprises: the device comprises pillars arranged at two sides of a road, suspension wires erected between the top ends of the two pillars, a spiral pre-twisted wire clamp and a power transmission line; preformed armor clamp includes: the cable comprises pre-twisted wire concentration clamps with equal spiral diameters and pre-twisted parallel clamps with variable spiral diameters; the pre-twisted wire concentration clamp is arranged between the two pre-twisted parallel wire clamps; one or more power transmission lines are wound and fixed on the suspension lines section by the pre-twisted line concentration clamp; the pre-twisted parallel wire clamp comprises a first section, a second section and a third section, wherein a part of the power transmission line is wound and fixed on the suspension line by the first section of the pre-twisted parallel wire clamp, and the second section of the pre-twisted parallel wire clamp is wound and fixed on the suspension line by the second section of the pre-twisted parallel wire clamp; the first section of the pre-twisted parallel wire clamp is close to the pre-twisted wire concentration clamp. The pre-twisted wiring system perfectly solves the problems of cross connection of the power transmission line at any position and parallel binding and installation of a plurality of power transmission lines, greatly simplifies the cross connection installation steps of the power transmission lines, and improves the installation efficiency.
Description
Technical Field
The invention relates to the technical field of electrified railway contact networks, in particular to a pre-twisted wiring system of a railway contact network.
Background
Along with the rapid development of electrified railways in China, the power supply mode and the type of a railway system are also in multi-stage, when an existing transformer substation supplies power to a railway contact net, a power supply main conductor (aluminum alloy) fed out from the transformer substation is directly laid on a support column beside a track on the opposite side of the transformer substation, then the power is taken from the power supply main conductor (aluminum alloy), and the power supply main conductor is connected with a contact net power transmission conductor below the power supply main conductor through a copper-aluminum transition parallel groove clamp or a pre-twisted T-shaped connecting strip to supply power to the contact net. Referring to fig. 1 and 2, in the drawings, a is a pillar, b is a main power supply conductor (aluminum alloy), c is a power transmission line (copper alloy), d is a copper-aluminum transition parallel groove clamp, f is a track of a parallel train, if power is supplied to the train passing through a middle track f in fig. 1, referring to fig. 2, after the connection of the power supply conductor b to the power transmission line c is realized through the copper-aluminum transition parallel groove clamp d, the power is led to a contact network. In the power supply mode, the copper-aluminum transition parallel groove clamp d is easy to corrode and break, so that the power transmission line c is lapped on a contact net to cause railway accidents, and meanwhile, because the distance between the copper-aluminum transition parallel groove clamp d and the track f of a train in the same row is too high, the copper-aluminum transition parallel groove clamp d is difficult to frequently overhaul at ordinary times, and certain trouble and workload are brought to operators. Referring to fig. 3 and 4, in the drawings, a is a strut, b is a main power supply conductor (aluminum alloy), c is a power transmission line (aluminum alloy), g is a preformed T-shaped connecting strip, f is a track of a train in the same row, if power is supplied to the train passing through the middle track f in fig. 3, referring to fig. 4, after the connection of the power supply conductor b to the power transmission line c is realized through the preformed T-shaped connecting strip g, the power is led to a contact net. In the power supply mode, the preformed T-shaped connecting strip g is easy to have large connecting resistance, large in heating and easy to ablate, so that the power transmission line c is lapped on a contact network to cause railway accidents, and meanwhile, the mounting position of the preformed T-shaped connecting strip g is too far away from the track f of a train running on the same line, so that the preformed T-shaped connecting strip is difficult to frequently overhaul at ordinary times, and certain troubles and workload are brought to operators.
In order to overcome the defects that the existing transformer substation supplies power to the contact network, the power supply mode of the power supply main line to the contact network is improved, and the improved principle is that a copper-aluminum transition connection fitting is not adopted above the contact network as much as possible, so that the fault is prevented, and the burden of operators is reduced. Therefore, the related technical personnel provide that a main power supply conductor (aluminum alloy) of a transformer substation is connected to an inlet end of an isolating switch of a track side pillar, an outlet end of the isolating switch is connected with a power transmission line made of copper alloy material, conversion of an aluminum copper conductor is realized through the isolating switch, and the power transmission line directly supplies power to a contact net. The installation position of the isolating switch is at the position close to the middle part of the pillar, and the installation height of the isolating switch is greatly reduced relative to the copper-aluminum transition parallel groove clamp and the pre-twisted T-shaped connecting strip, so that the isolating switch is convenient for maintenance of operators; meanwhile, a copper-aluminum transition fitting does not need to be installed above the contact net, and the defect of the copper-aluminum transition fitting is avoided.
Referring to fig. 5, a main power supply conductor (aluminum alloy) b is connected to an incoming line end of an isolator h, a power transmission line (copper alloy) c is connected out from an outgoing line end of the isolator h, in order to supply power to trains on a plurality of groups of tracks f arranged in the same area at the same time, power needs to be supplied to a contact network above each group of tracks f, a plurality of power transmission lines c need to be respectively and vertically bridged at the contact network above the corresponding track f, in order to realize vertical bridging of the power transmission lines c, a hanging point needs to be arranged beside each group of tracks f, the track f adjacent to a pillar a where the isolator h is located can be provided with the hanging point by using the pillar a, but power supply of trains on other tracks f needs to be additionally provided with a corresponding number of hanging points, the hanging points are hanging pillars directly arranged on the ground or hanging positions arranged on a supporting beam, taking the power supply to the contact network above the middle track f in fig. 5 as an example, and a hanging support column j is arranged on the other side of the track f along the trend of the power transmission line c, fig. 6 is a schematic top view of the wiring of the power transmission line c after the hanging support column j is arranged on the ground, and the power transmission line c is hung on the overline support column through a hanging point fitting k such as a wire clamp, so that the power transmission line c at the position is hung downwards and vertically bridged on the contact net above the group of tracks f.
In order to realize the vertical bridging of the transmission line c, the power supply wiring method of the overhead line system, which is exemplified by fig. 5 and 6, has the following disadvantages: (1) for the roads with a plurality of groups of tracks f densely arranged, due to the limitation of the distance between the tracks, no position for bridging a pillar is set, or no supporting beam is provided or no position and space for hanging and holding positions are set on the supporting beam, so that the direct bridging of the transmission line c at any position cannot be realized; (2) even if there is a position and a space where a cross-over pillar or a hanging position can be set, the cost for setting the cross-over pillar, the supporting beam, and the hanging position is high, and the operation of hanging the power transmission line c using a hanging point fitting k such as a wire clamp is also complicated.
In order to match the flexible arrangement of the track, the transmission line that guarantees to connect out from isolator can be at arbitrary position to the bridging of contact net, needs urgently to provide a wiring system of railway contact net.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a pre-twisted type wiring system of a railway contact network, which can realize that a power transmission line is bridged to the contact network at any required position without the limitation of the arrangement interval of a track, and is convenient to install.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preformed binding post system of a railway catenary, comprising: the device comprises pillars arranged at two sides of a road, suspension wires erected between the top ends of the two pillars, a spiral pre-twisted wire clamp and a power transmission line;
the preformed armor clamp includes: the cable comprises pre-twisted wire concentration clamps with equal spiral diameters and pre-twisted parallel clamps with variable spiral diameters; the pre-twisted wire concentration clamp is arranged between the two pre-twisted parallel wire clamps;
the pre-twisted wire concentration clamp winds and fixes one or more power transmission wires to the suspension wires section by section;
the pre-twisted parallel wire clamp first section is used for winding and fixing a part of the power transmission line on the suspension line, and the pre-twisted parallel wire clamp second section is wound and fixed on the suspension line; the first section of the pre-twisted parallel wire clamp is close to the pre-twisted wire concentration clamp.
Furthermore, the pre-twisted wire concentration clamp comprises more than three screw pitches, all the screw pitches have the same diameter, and the diameters of the screw pitches are matched with the sum of the diameters of the power transmission line to be fixed and the suspension line.
Furthermore, the first section of the pre-twisted parallel wire clamp comprises more than three screw pitches, and the diameters of all the screws are the same and are equal to the diameters of the screws of the pre-twisted wire clamp;
the diameter of the second section of the pre-twisted parallel wire clamp is matched with the diameter of the suspension wire.
Furthermore, a transition section is connected between the first section and the second section of the pre-twisted parallel wire clamp, and the spiral diameter of the transition section is smaller than that of the first section and larger than that of the second section; and the transition section gradually decreases in diameter from the first section to the second section.
Furthermore, the pre-twisted wire concentration clamp and the pre-twisted wire parallel clamp are formed by fixing a plurality of wires side by side.
According to the pre-twisted wiring system, the hanging wire is matched with the pre-twisted wire concentration clamp and the pre-twisted parallel wire clamp, the pre-twisted wire concentration clamp can firmly bind the middle parts of a plurality of power transmission lines with the same or different diameters to the hanging wire, the first section of the pre-twisted parallel wire clamp continuously winds and fixes one part of the power transmission lines to the hanging wire, the vertical droop at one end of the power transmission lines is bridged to the contact net, and the second section of the pre-twisted parallel wire clamp is wound and fixed to the hanging wire, so that the pre-twisted parallel wire clamp can bear the weight of the power transmission lines which are bridged downwards, firm installation of the pre-twisted parallel wire clamp is guaranteed, and meanwhile the power transmission lines can be freely bridged downwards at a free angle. The pre-twisted wiring system perfectly solves the problems of cross connection of the power transmission lines at any position and parallel binding installation of a plurality of power transmission lines, saves the cost of erecting cross-line pillars or arranging hanging positions between tracks, greatly simplifies the cross connection installation steps of the power transmission lines and improves the installation efficiency; the pre-twisted wire concentration clamp and the pre-twisted parallel wire clamp can be firmly held on the power transmission line, are simple and convenient to install, can be installed by hands, do not need tools, improve the installation efficiency of the power transmission line, greatly reduce the operation cost simultaneously, do not need maintenance personnel to look over in unscheduled maintenance, and achieve the maintenance-free requirement.
Drawings
Fig. 1 is a schematic diagram of a connection mode of a power transmission line of a contact network in the prior art;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
fig. 3 is a schematic view of another connection mode of a power transmission line of a contact network in the prior art;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
fig. 5 is a schematic diagram of a connection mode of a power transmission line of a contact network in the related art;
fig. 6 is a schematic partial top view of a connection mode of a power transmission line of a contact network in the related art;
FIG. 7 is a schematic diagram of a pre-twisted wire system provided in the present example;
FIG. 8 is a schematic top view partially in section of the preformed electrical connection system provided in this example;
fig. 9 is a schematic structural view of the pre-twisted wire concentrating clamp 3 in fig. 7;
fig. 10 is a schematic structural view of the pre-twisted parallel wire clamp 4 in fig. 7;
in the figure:
1-a pillar; 2-a suspension wire; 3-preformed wire-collecting clamp; 4-preformed parallel wire clamps; 4-1 — first stage; 4-2 — second stage; 4-3-transition section; 5-a transmission line; 6, a power supply main conductor; 7, an isolating switch; 8-orbit.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is described clearly and completely below with reference to the drawings in the examples of the present invention, and it is obvious that the described examples are only a part of examples of the present invention, and not all examples. All other embodiments obtained by a person skilled in the art based on examples in the present invention shall fall within the scope of protection of the present invention without making creative efforts.
Referring to fig. 7-10, the present example provides a pre-twisted wire connection system for a railway catenary, comprising: the device comprises pillars 1 arranged at two sides of a road, suspension wires 2 erected between the top ends of the pillars 1, spiral pre-twisted wire clamps and power transmission wires 5;
preformed armor clamp includes: the cable comprises a pre-twisted wire concentration clamp 3 with equal spiral diameter and a pre-twisted parallel wire clamp 4 with variable spiral diameter; the pre-twisted wire concentration clamp 3 is arranged between two pre-twisted parallel wire clamps 4;
one or more power transmission lines 5 are wound and fixed on the suspension line 2 section by the pre-twisted line concentration clamp 3;
a first section 4-1 of the pre-twisted parallel wire clamp 4 winds and fixes a part of the power transmission line 5 on the suspension line 2, and a second section 4-2 of the pre-twisted parallel wire clamp 4 winds and fixes on the suspension line 2; the first section 4-1 of the pre-twisted parallel wire clamp 4 is close to the pre-twisted wire-collecting wire clamp 3.
The pre-twisted wire connection system of this example, the pre-twisted wire-collecting clamp 3 can firmly bind the middle of a plurality of power transmission lines 5 of the same or different diameters to the suspension line 2 by the cooperation of the suspension line 2 with the pre-twisted wire-collecting clamp 3 and the pre-twisted parallel clamp 4, the first section 4-1 of the pre-twisted parallel clamp 4 continues to wind and fix a part of the power transmission lines 5 to the suspension line 2, the second section 4-2 of the pre-twisted parallel clamp 4 winds and fixes to the suspension line 2, see fig. 7-8, the left end of the transmission line 5 in the figure is bridged to the suspension line 2 from the outgoing end of the isolating switch 7, the right end of the transmission line 5 in the figure is vertically bridged to the contact net in a drooping mode, the pre-twisted parallel wire clamp 4 can bear the weight of the transmission line 5 in downward bridging, firm installation of the pre-twisted parallel wire clamp 4 is guaranteed, and meanwhile the transmission line 5 can be freely bridged downward at a free angle. The pre-twisted wiring system perfectly solves the problem that the power transmission line 5 is bridged at any position and a plurality of power transmission lines 5 are bound and installed in parallel, saves the cost of erecting a cross-line pillar or arranging a hanging position between the tracks 8, greatly simplifies the step of bridging installation of the power transmission lines 5 and improves the installation efficiency; preformed helical line concentration fastener 3 and preformed helical parallel connection fastener 4 can firmly grip power transmission line 5, and simple installation can bare-handed installation, need not the instrument, has improved 5 installation effectiveness of power transmission line, simultaneously greatly reduced the cost of operation, need not maintainer unscheduled maintenance to look over, accomplished non-maintaining demand.
Referring to fig. 6, in the connection manner of the transmission lines c provided with the cross-over strut j, when the line diameters of the two transmission lines c are different greatly, the specifications of the hanging point fittings k for hanging different transmission lines c may be inconsistent, and the installation difficulty of the transmission lines c is further increased; when the pre-twisted wire concentration clamp 3 and the pre-twisted parallel wire clamp 4 of the example are used for installing the power transmission line 5, the two power transmission lines 5 with different wire diameters can be simultaneously wound and fixed, and the installation is convenient.
Referring to fig. 7, in this example, only hanging point fittings need to be installed at the pillars 1 on both sides of the road, and the hanging line 2 is erected between the two pillars 1 without other hanging point fittings for hanging the transmission line 5.
The pre-twisted wire concentration clamp 3 and the pre-twisted parallel wire clamp 4 are flexible to install, the length can be adjusted according to the position of the cross-over connection, the installation is simple and convenient, the installation can be carried out by hands, tools are not needed, and the installation efficiency of the power transmission line 5 is improved.
Referring to fig. 9, the pre-twisted wire concentration clamp 3 includes more than three pitches, all of which have the same diameter and are matched with the sum of the diameters of the transmission line 5 to be fixed and the suspension line 2.
Referring to fig. 10, the first section 4-1 of the pre-twisted parallel wire clamp 4 comprises more than three screw pitches, and all the screw diameters are the same and equal to the screw diameter of the pre-twisted wire concentration clamp 3;
the spiral diameter of the second section 4-2 of the pre-twisted parallel wire clamp 4 is matched with the wire diameter of the suspension wire 2.
A transition section 4-3 is connected between a first section 4-1 and a second section 4-2 of the pre-twisted parallel wire clamp 4, and the spiral diameter of the transition section 4-3 is smaller than that of the first section 4-1 and larger than that of the second section 4-2; and the transition section 4-3 gradually decreases in diameter from the first section 4-1 to the second section 4-2.
The spiral diameters of the pre-twisted wire concentration clamp 3 and the pre-twisted parallel wire clamp 4 enable the pre-twisted wire concentration clamp and the pre-twisted parallel wire clamp to be tightly matched with the power transmission line 5 and the suspension line 2 respectively, and the pre-twisted wire concentration clamp 3 and the pre-twisted parallel wire clamp 4 can be installed more firmly and conveniently. The pre-twisted wire concentration clamp 3 and the pre-twisted parallel wire clamp 4 can uniformly disperse the static pressure of the power transmission line 5, provide uniform holding power for power transmission points and have no stress concentration.
The pre-twisted wire concentration clamp 3 and the pre-twisted wire parallel clamp 4 of the present example are formed by fixing a plurality of wires side by side, and the pre-twisted wire concentration clamp 3 and the pre-twisted wire parallel clamp 4 may be formed by fixing metal wires side by side or non-metal wires side by side.
Finally, it is to be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not intended to be limiting. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as within the scope of the invention.
Claims (5)
1. The utility model provides a preformed helical wiring system of railway contact net which characterized in that includes: the device comprises pillars arranged at two sides of a road, suspension wires erected between the top ends of the two pillars, a spiral pre-twisted wire clamp and a power transmission line;
the preformed armor clamp includes: the cable comprises pre-twisted wire concentration clamps with equal spiral diameters and pre-twisted parallel clamps with variable spiral diameters; the pre-twisted wire concentration clamp is arranged between the two pre-twisted parallel wire clamps;
the pre-twisted wire concentration clamp winds and fixes one or more power transmission wires to the suspension wires section by section;
the pre-twisted parallel wire clamp first section is used for winding and fixing a part of the power transmission line on the suspension line, and the pre-twisted parallel wire clamp second section is wound and fixed on the suspension line; the first section of the pre-twisted parallel wire clamp is close to the pre-twisted wire concentration clamp.
2. The pre-twisted wire connection system of claim 1, wherein the pre-twisted wire concentration clamp comprises more than three pitches, all of which have the same diameter and are matched with the sum of the diameters of the transmission line and the suspension line to be fixed.
3. The pre-twisted wire connection system of claim 2, wherein the pre-twisted parallel clamp first section comprises more than three pitches, all of the spirals having the same diameter as the pre-twisted wire clamp spirals;
the diameter of the second section of the pre-twisted parallel wire clamp is matched with the diameter of the suspension wire.
4. The pre-twisted wire connection system of claim 3, wherein a transition section is connected between the first section and the second section of the pre-twisted parallel wire clamp, the transition section having a helical diameter that is less than the helical diameter of the first section and greater than the helical diameter of the second section; and the transition section gradually decreases in diameter from the first section to the second section.
5. The pre-twisted wire connection system of claim 1, wherein the pre-twisted wire concentration clamp and the pre-twisted wire parallel clamp are each comprised of a plurality of wires fixed side-by-side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165693.4A CN114475368B (en) | 2022-02-23 | 2022-02-23 | Preformed wiring system of railway contact net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165693.4A CN114475368B (en) | 2022-02-23 | 2022-02-23 | Preformed wiring system of railway contact net |
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| Publication Number | Publication Date |
|---|---|
| CN114475368A true CN114475368A (en) | 2022-05-13 |
| CN114475368B CN114475368B (en) | 2023-11-14 |
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| CN202210165693.4A Active CN114475368B (en) | 2022-02-23 | 2022-02-23 | Preformed wiring system of railway contact net |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004336967A (en) * | 2003-05-12 | 2004-11-25 | Nippon Telegr & Teleph Corp <Ntt> | Cable supporting system |
| CN205319658U (en) * | 2015-12-15 | 2016-06-15 | 北京帕尔普线路器材有限公司 | Carbon fiber wire fastener that continues |
| CN209358206U (en) * | 2018-12-29 | 2019-09-06 | 上海神勇机械技术有限公司 | A kind of preformed carrying out safety backup wire clamp mounting structure of conducting wire pendency |
| CN112118994A (en) * | 2018-06-01 | 2020-12-22 | 普拉塞-陶伊尔铁路机械出口股份有限公司 | Method for determining the actual position of a rail of a track |
| CN214689121U (en) * | 2021-03-09 | 2021-11-12 | 辽宁海澳科技有限公司 | Backup wire clamp for elastic sling |
| CN217334847U (en) * | 2022-02-23 | 2022-08-30 | 北京帕尔普线路器材有限公司 | Pre-twisted wire concentration parallel device |
-
2022
- 2022-02-23 CN CN202210165693.4A patent/CN114475368B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004336967A (en) * | 2003-05-12 | 2004-11-25 | Nippon Telegr & Teleph Corp <Ntt> | Cable supporting system |
| CN205319658U (en) * | 2015-12-15 | 2016-06-15 | 北京帕尔普线路器材有限公司 | Carbon fiber wire fastener that continues |
| CN112118994A (en) * | 2018-06-01 | 2020-12-22 | 普拉塞-陶伊尔铁路机械出口股份有限公司 | Method for determining the actual position of a rail of a track |
| CN209358206U (en) * | 2018-12-29 | 2019-09-06 | 上海神勇机械技术有限公司 | A kind of preformed carrying out safety backup wire clamp mounting structure of conducting wire pendency |
| CN214689121U (en) * | 2021-03-09 | 2021-11-12 | 辽宁海澳科技有限公司 | Backup wire clamp for elastic sling |
| CN217334847U (en) * | 2022-02-23 | 2022-08-30 | 北京帕尔普线路器材有限公司 | Pre-twisted wire concentration parallel device |
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| CN114475368B (en) | 2023-11-14 |
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