CN106384629A - High transmission load bearing detection cable - Google Patents

High transmission load bearing detection cable Download PDF

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Publication number
CN106384629A
CN106384629A CN201611082555.0A CN201611082555A CN106384629A CN 106384629 A CN106384629 A CN 106384629A CN 201611082555 A CN201611082555 A CN 201611082555A CN 106384629 A CN106384629 A CN 106384629A
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CN
China
Prior art keywords
cable
twisted
layer
core
transmission
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Granted
Application number
CN201611082555.0A
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Chinese (zh)
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CN106384629B (en
Inventor
王雪莹
其他发明人请求不公开姓名
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Shandong Hill Cable Co Ltd
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Shandong Hill Cable Co Ltd
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Priority to CN201611082555.0A priority Critical patent/CN106384629B/en
Publication of CN106384629A publication Critical patent/CN106384629A/en
Application granted granted Critical
Publication of CN106384629B publication Critical patent/CN106384629B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/06Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/06Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08Screens specially adapted for reducing cross-talk
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875Multi-layer sheaths
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22Metal wires or tapes, e.g. made of steel

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Communication Cables (AREA)

Abstract

The invention discloses a high transmission load bearing detection cable. The high transmission load bearing detection cable comprises a plurality of cable conductors, insulation layers, a shielding layer, and armoring layers. The plurality of cable conductors are used for transmitting signals; the insulation layers wrap the cable conductors and perform insulation separation among the cable conductors; the cable conductor is wrapped by the insulation layer to form a cable core; a shielding layer is arranged on the outside of the insulation layers to shield various interferences; the armoring layers are arranged on the outside of the shielding layer and are obtained through armoring of a plurality of steel wires; double-stranded-wire-structure cable cores exist among the plurality of the cable conductors and each double-stranded-wire-structure cable core is obtained through two cable conductors, which improve a cable signal transmission speed. The high transmission load bearing detection cable improves a twisting mode of a cable core and the two cable cores in the middle adopt a double-stranded-wire mode, which effectively inhibits common mode interference; the double-stranded-wire communication mode is beneficial for transmission modes of a Manchester code, DSL, OFDM, etc; even under a strong interference environment, the double stranded wire can transmit quality images and signals; the double-stranded-wire cable can realize duplex communication, replaces a traditional simplex communication mode and increases the transmission speed of the cable from 200kbs to 5Mbps.

Description

A kind of high-transmission charge bearing detecting cable
Technical field
The present invention relates to field of cables, particularly relate to a kind of high-transmission charge bearing detecting cable.
Background technology
Oil is more and more important as strategic resource, during oil exploitation, needs to gather by various loggers The various indexs of down-hole and parameter, and it is transferred to the analysis controlling unit on ground through logging cable, adopted according to different situations Treatment measures, are controlled to downhole instrument, conventional cable length general 4000-7000 rice, and signal attenuation is very big, and speed carries High difficult, current downhole instrument quickly grows so that the speed of cable transmission becomes efficiency bottle neck, therefore reliably passes through at a high speed Long cable transmission data is very important research direction.Long-distance transmissions mainly pass through fiber optic communication at present, but pass in well logging Require in defeated system to bear the working environment of pulling force and High Temperature High Pressure so that optical fiber difficulty is big on engineering, maintenance cost Height, therefore adopts the long-distance transmissions of cable irreplaceable at present.
Charge bearing detecting cable, as downhole probe measurement connecting line, while transmitting signal, also has load bearing equipment Effect.Affected by the objective factor such as existing logging technique and remote measurement short circuit equipment, the transfer rate of data is typically in 100Kbps Left and right, by orthogonal frequency division multiplexi(OFDM)Message transmission rate highest can arrive 500Kbps, and transmission speed is relatively Slowly, and capacity of resisting disturbance is weak, data degradation ratio is more serious, and traditional logging cable can not meet use demand, need badly and do Go out to change, to meet the demand to this cable for the market.
The cable core structure of existing logging cable is the stranded form of 1+6, and the concrete structure of 1+6 form can be found in patent documentation , during the wireline logging of the type, will necessarily there is following Railway Project in CN201773614U, CN2762292Y etc.:
1st, during induction logging, influence each other between the vortex that transmitting coil induces in rock stratum so that logging instrument is remembered The conductivity signal of record weakens significantly;
2nd, in well logging, crosstalk phenomenon is serious, and data lacks seriously after remote measurement short circuit is transferred to ground, and reference significance is not Greatly;
In sum it is necessary to design a kind of new cable, to solve the above problems.
Content of the invention
The problem existing for prior art, the mesh of the present invention is to provide a kind of high-transmission charge bearing detecting cable, passes through Brand-new design to cable twisting structure, changes traditional stranded form, effectively reduces the Kelvin effect of cable, and really Protect signal pure.
In order to reach above-mentioned purpose, the present invention adopts the following technical scheme that:
A kind of high-transmission charge bearing detecting cable, this cable includes:
Some cable conductors, described cable conductor is used for transmission signal;
Insulating barrier, coats cable conductor, by insulated separation between each cable conductor, described cable conductor is wrapped up shape by insulating barrier Become cable core;
Screen layer, is located at outside insulating barrier, shielding various interference it is ensured that cable signal pure;
Armor, is located at outside screen layer, is formed by many wire armorings, and protection internal structure is injury-free;
Wherein, it is provided with, in some cable conductors, the twisted pair construction being formed by two cable conductors, to improve cable signal Transfer rate.
Preferably, described cable conductor is quad, and using the unconventional stranded form of 2+2, middle two cable cores are adopted With the form of twisted-pair feeder, another two cable cores are cabled on the gap of twisted-pair feeder, and this stranding mode can effectively suppression common mode interference.
Preferably, twisted-pair feeder will not be able to be occurred each other using graceful code, DSL or OFDM transmission mode, many twisted-pair feeders Interference, twisted-pair feeder adopts duplex signaling to substitute traditional either simplex communication modes, and the transfer rate of cable can be made to reach 5Mbps.
Preferably, form the cable core diameter with diameter greater than other non-twisted-pair feeders for the cable core of twisted-pair feeder, in the cable core of twisted-pair feeder The seal wire quantity that portion cable conductor adopts is more than the seal wire quantity of non-twisted-pair feeder, the thickness of insulating layer of the cable core of twisted-pair feeder also greater than The thickness of insulating layer of non-twisted-pair feeder cable core.
Preferably, described armor is divided into inner armor layer and armoured layer, inner armor layer and armoured layer by many steel wires Armouring forms, and also has an inner restrictive coating, filling with sealant between inner armor layer and inner restrictive coating, between described steel wire and steel wire, Between inner armor layer and armoured layer and seamless presence between cable and choke tube.
Preferably, the section of steel wire of described inner armor layer or armoured layer is circular, fan annular, zigzag or is combined into Circular shaped filaments.
Preferably, described cable core is two cores, three cores, four cores or seven cored structures.
Preferably, wherein, described screen layer be shielding material or shielding band it is ensured that wired signal transmission pure.
Preferably, using seven core cable, a combination thereof structure is 2+5, and that is, center position is provided with two cable conductors, its Around his 5 cable conductors are evenly spaced in, two middle cable conductors 1 adopt twisted pair construction.
Preferably, the quantity according to cable inner cable conductor, can also arrange two or more sets twisted pair construction in cable.
The invention has the beneficial effects as follows:
Improve the stranded mode of cable conductor, be designed as the unconventional strand of 2+2 taking 4 core cables as a example by regular stranded mode Conjunction form, in the form of twisted-pair feeder, another two cable cores are cabled on the gap of twisted-pair feeder middle two cable cores, this stranding mode Can effectively suppression common mode interference, the communication modes of twisted-pair feeder are conducive to the transmission means such as graceful code, DSL and OFDM, make the cable be Make under strong interference environment, twisted-pair feeder also can transmit fabulous picture intelligence, and many twisted-pair feeders will not occur each other Interference;Twisted-pair cable can realize duplex signaling, substitutes traditional either simplex communication modes, can make the transfer rate of cable by 200kbs brings up to 5Mbps.The raising of transfer rate, can simplify downhole logging instruments, optimize circuit, directly transfer signals to Well face is it is not necessary to a series of activities such as data processing.Between steel wire and steel wire, between inner armor layer and armoured layer and cable Gap filling and choke tube between have fluid sealant or extrusion sheath, cable go into the well degree-of-difficulty factor reduce, service life improve, ring Border pollution substantially reduces.
Brief description
Fig. 1 is the structural representation of the present invention;
Fig. 2 is another structural representation of the present invention;
Wherein:1st, cable conductor, 1-1, twisted-pair cable conductor, 1-2, non-twisted-pair cable conductor, 2, insulation, 3, screen layer, 4th, fill, 5, inner armor layer, 6, armoured layer.
Specific embodiment
Below, refer to the attached drawing, is more fully illustrated to the present invention, shown in the drawings of the exemplary enforcement of the present invention Example.However, the present invention can be presented as multiple multi-forms, it is not construed as the exemplary enforcement being confined to describe here Example.And it is to provide these embodiments, so that the present invention is fully and completely, and will fully convey the scope of the invention to this The those of ordinary skill in field.
For ease of explanation, here can using " on ", the space relative terms such as D score " left " " right ", for saying Shown in bright in figure a element or feature are with respect to the relation of another element or feature.It should be understood that except in figure Outside the orientation illustrating, spatial terminology is intended to the different azimuth in use or operation including device.For example, if in figure Device is squeezed, be stated as positioned at the element of other elements or feature D score will be located into other elements or feature " on ".Cause This, exemplary term D score can comprise both upper and lower orientation.Device can otherwise position(Ratate 90 degrees or be located at Other orientation), can correspondingly explain used herein of space explanation relatively.
Embodiment one
As shown in figure 1, a kind of present invention high-transmission charge bearing detecting cable, the bosom of cable is cable conductor 1, cable conductor 1 Varying number can be set, and accompanying drawing is shown as four, i.e. quad, also have two cores, three cores, seven cored structures.Quad Conventional set-up mode is formed for four identical cable cores.In order to obtain higher transmission quality, conventional 4 core rows in the prior art Improve on the basis of cloth structure, wherein two cable cores of cable are set to twisted pair construction, another two cable cores are cabled to double On the gap of twisted wire, abbreviation 2+2 structure, this stranding mode can effectively suppression common mode be disturbed, and the communication modes of twisted-pair feeder are conducive to The transmission means such as graceful code, DSL and OFDM, even if making cable under strong interference environment, twisted-pair feeder also can transmit fabulous image Signal, and many twisted-pair feeders will not disturb each other;Twisted-pair cable can realize duplex signaling, substitutes traditional Either simplex communication modes, can make the transfer rate of cable bring up to 5Mbps by 200kbs.
The design of cable center's cable core twisted-pair feeder form, can effectively suppression common mode disturb in common mode transmission, common mode passes Defeated be because that two conductor current potentials are identical, therefore mutual capacitance is zero, and electric capacity reduces because mutual capacitance reduces, and sense of current phase Instead, mutual inductance is maximum, and inductance increases, accordingly even when under strong interference environment, twisted-pair feeder also can transmit because mutual inductance increases Fabulous picture intelligence, and many twisted-pair feeders will not disturb each other.Can using the low twisted-pair feeder of characteristic impedance Suppression crosstalk, the characteristic impedance of twisted-pair feeder is 100 about, and the propagation delay time is 5.3ns/m, not only low cost, using Convenient.
In the embodiment of preferred quad, two cable cores using twisted pair construction are arranged than other two cable cores Must have thicker cable conductor diameter, the cable conductor 1-1 of twisted-pair feeder is formed using 19 seal wires, is set to 3 layers, bosom 1 Root, 6, intermediate layer, 12 close-packed arrays of outer layer, the cable conductor 1-2 of remaining non-twisted-pair feeder is formed using 7 seal wires.Every electricity All it is coated with insulating barrier 2, the thickness of insulating layer outside two cable conductor 1-1 of twisted pair construction is more than non-double outside cable conductor Thickness of insulating layer outside two cable conductor 1-2 of twisted wire.That is the cable core of twisted pair construction with diameter greater than remaining The diameter of cable core.Such advantage is to improve the compactness between each cable core, and the cable of twisted pair construction is led Body 1-1, farther away from armor, can reduce the impact to each cable conductor transmission quality for the armor to a greater extent.
It is crosstalk due to affecting one of major reason of transmission quality, crosstalk is caused by mutual tolerance and mutual inductance, cable Between crosstalk be when two or several longer wires parallel and in close proximity when, the signal on any of which wire will be to other Signal on wire produces interference.Between line, interference mostly occurs between parallel wire on multicore cable.The power of crosstalk with Between adjacent two holding wires, the impedance of mutual impedance and holding wire itself is relevant.
Make transmission line with the twisted-pair feeder of two points ground fault, both can significantly reduce crosstalk noise, electrostatic screen can be played again and make With.
Every cable conductor 1 is all wrapped up by insulating barrier 2, and the effect of insulating barrier 2 is that each cable conductor 1 is separated insulation, Prevent connection between each cable conductor conductive, every cable conductor 1 is all formed by 7 seal wires are stranded.The outside of insulating barrier 2 Effect for screen layer 3, screen layer 3 is to shield other signals and electromagnetic interference, and described screen layer 3 is shielding material or shielding band, Screen layer 3 by all cable conductors 1 be wrapped in interior it is ensured that wired signal transmission pure;Inner armor layer 5 and armoured layer 6, its Effect is that the cable core structure to its inside provides protection to adapt to severe working environment, and has good tension resistance The change to adapt to external channel of energy and suitable flexibility;Filling 4, it is distributed between insulating barrier 2 and screen layer 3 and shields Between layer 3 and inside and outside armor 5,6, effect is to maintain and supports each cable to lead 1 in tram, prevents from deforming and shifts, Filling 4 can be fluid sealant or extrusion sheath.
Wherein, it is additionally provided with inner restrictive coating outside screen layer 3, described inner armor layer 5 forms for many wire armorings, inner armor layer Filling with sealant between 5 and inner restrictive coating.
Described armoured layer 6 is also formed by many wire armorings.Between described steel wire and steel wire, inner armor layer 5 and outer armour Fill between layer 6 and seamless presence between cable and choke tube.
The section of steel wire of described inside and outside armor can be circular or fan annular, zigzag etc. other be combined into Circular shaped filaments.
Embodiment two
As shown in Fig. 2 another preferred embodiment is 7 core cables, if adopting 7 core cables, conventional seven core cable structure is usual For a cable core in centre, other six roots of sensation are looped around the structure of surrounding., attenuation constant with frequency is in taking 7 core armored cables as a example Existing linear change.And it is important that because the impact of armor has approach effect, center cable core declining than peripheral cable core Subtract that constant is little, the transmission attenuation of therefore center cable core less that is to say, that the transmission signal mass ratio periphery cable core of center cable core Quality high.
In order to obtain higher transmission quality, improve on the basis of conventional 7 core arrangements in the prior art, will The middle cable core of cable is set to twin-core structure, and that is, center position is provided with two cable conductors, and other 5 cable conductors are equal Even be arranged in around, two middle cable conductors 1 adopt twisted pair construction.That is conventional 7 core cable settings are 1+6 knots Structure, present invention employs 2+5 structure.
Because the reason approach effect, armouring impact than larger so that closing on the cable core signal attenuation of armor relatively Big that is to say, that center cable core with respect to cable core around farther away from the interference of armor, there is more excellent transmission matter The cable core of twisted pair construction is therefore had the technique effect of more preferable transmission signal by amount located at center.
Because the cable core of twisted pair construction has preferable transmission characteristic, therefore it is not limited to using one group of twisted pair construction, Two groups of twisted pair construction or multigroup twisted pair construction can also be set, such as in 7 core cables can for 2+5 structure it is also possible to It is 2+2+3 structure or 1+2+2+2 structure.Other such as three-core cables can adopt 2+1 structure.There is the electricity of greater number cable core Cable can also such one group of row of propulsion, two or more sets twisted pair construction arrangement.
Due between the steel wire and steel wire of armor, between inner armor layer and armoured layer and cable and choke tube it Between gap filling have fluid sealant or extrusion sheath, cable go into the well degree-of-difficulty factor reduce, service life improve, environmental pollution is significantly Reduce.And the outer surface of armoured layer 6 is almost considered as pure circle type, forms dynamic sealing with choke tube, improve to a great extent Fluency of going into the well.
Although only giving 4 and 7 cored structures in this programme, but not changing other structures, only changing cable core quantity The deformation of other schemes is it should be also considered as falling into the protection domain of this programme.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one The scope the widest causing.

Claims (10)

1. a kind of high-transmission charge bearing detecting cable is it is characterised in that this cable includes:
Some cable conductors, for transmission signal;
Insulating barrier, for coating cable conductor, by insulated separation between each cable conductor, described cable conductor is by insulating barrier bag Wrap up in formation cable core;
Screen layer, is located at outside insulating barrier, for shielding various interference;
Armor, is located at outside screen layer, is formed by many wire armorings;
Wherein, be formed as twisted pair construction using two cable conductors in some cable conductors, to improve wired signal transmission Speed.
2. high-transmission charge bearing detecting cable according to claim 1 is it is characterised in that described cable conductor is four core electricity Cable, using the unconventional stranded form of 2+2, in the form of twisted-pair feeder, another two cable cores are cabled to multiple twin to middle two cable cores On the gap of line, this stranding mode can effectively suppression common mode interference.
3. high-transmission charge bearing detecting cable according to claim 2 it is characterised in that twisted-pair feeder adopt graceful code, DSL or OFDM transmission mode, many twisted-pair feeders will not disturb each other, and twisted-pair feeder adopts duplex signaling to substitute traditional either simplex Communication modes, can make the transfer rate of cable reach 5Mbps.
4. the high-transmission charge bearing detecting cable according to Claims 2 or 3 is it is characterised in that the cable core forming twisted-pair feeder is straight Footpath is more than the cable core diameter of other non-twisted-pair feeders, and the seal wire quantity that the cable core inside cable conductors of twisted-pair feeder adopt is more than non-multiple twin The seal wire quantity of line, the thickness of insulating layer of the cable core of twisted-pair feeder is also greater than the thickness of insulating layer of non-twisted-pair feeder cable core.
5. the high-transmission charge bearing detecting cable according to any one of claims 1 to 3 is it is characterised in that described armor divides For inner armor layer and armoured layer, inner armor layer and armoured layer are formed by many wire armorings, also have inner restrictive coating, interior armour Filling with sealant between dress layer and inner restrictive coating, between described steel wire and steel wire, between inner armor layer and armoured layer and electric Seamless presence between cable and choke tube.
6. the high-transmission charge bearing detecting cable according to any one of claims 1 to 3, described high-transmission bearing detection is electric Cable is it is characterised in that the section of steel wire of described armor is circular, fan annular, zigzag or is combined into circular abnormity Silk.
7. high-transmission charge bearing detecting cable according to claim 1 it is characterised in that described cable core be two cores, three cores, Four cores or seven cored structures.
8. the high-transmission charge bearing detecting cable according to any one of claims 1 to 3 is it is characterised in that described screen layer is Shielding material or shielding band it is ensured that wired signal transmission pure.
9. high-transmission charge bearing detecting cable according to claim 1 it is characterised in that adopting seven core cable, tie by a combination thereof Structure is 2+5, and that is, center position is provided with two cable conductors, and other 5 cable conductors are evenly spaced in around, the two of centre Root cable conductor 1 adopts twisted pair construction.
10. high-transmission charge bearing detecting cable according to claim 1 is it is characterised in that according to cable inner cable conductor Quantity, can also arrange two or more sets twisted pair construction in cable.
CN201611082555.0A 2016-11-30 2016-11-30 A kind of high-transmission charge bearing detecting cable Active CN106384629B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107331463A (en) * 2017-08-07 2017-11-07 山东希尔电缆有限公司 WMF adjusts the closed charge bearing detecting cable of dedicated spill-proof stream when surveying
CN107359003A (en) * 2017-08-07 2017-11-17 山东希尔电缆有限公司 WMF high-intensity high-tenacities adjust charge bearing detecting cable when surveying
CN109003718A (en) * 2018-06-19 2018-12-14 江苏华能电缆股份有限公司 Robot hot dry rock charge bearing detecting cable
CN110998975A (en) * 2017-09-14 2020-04-10 株式会社藤仓 Leakage coaxial cable
CN112271014A (en) * 2020-09-23 2021-01-26 上海天诚通信技术股份有限公司 Foaming type one-to-one Ethernet twisted pair
CN115641992A (en) * 2022-11-15 2023-01-24 江苏华能电缆股份有限公司 Load-bearing detection cable and logging system

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CN202394574U (en) * 2011-11-18 2012-08-22 特变电工股份有限公司 Load-bearing exploration cable
CN106057310A (en) * 2016-07-29 2016-10-26 山东希尔电缆有限公司 WMF series sealed wear-resisting load-bearing detection cable

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GB2329487B (en) * 1997-09-04 2002-02-20 Western Atlas Int Inc Combined optic fibre/electrical well logging cables
CA2298313A1 (en) * 1999-03-05 2000-09-05 Nordx/Cdt, Inc. A semi-shielded cable
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CN106057310A (en) * 2016-07-29 2016-10-26 山东希尔电缆有限公司 WMF series sealed wear-resisting load-bearing detection cable

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107331463A (en) * 2017-08-07 2017-11-07 山东希尔电缆有限公司 WMF adjusts the closed charge bearing detecting cable of dedicated spill-proof stream when surveying
CN107359003A (en) * 2017-08-07 2017-11-17 山东希尔电缆有限公司 WMF high-intensity high-tenacities adjust charge bearing detecting cable when surveying
CN107359003B (en) * 2017-08-07 2023-05-05 山东希尔电缆有限公司 WMF high-strength high-toughness load-bearing detection cable capable of measuring and adjusting simultaneously
CN110998975A (en) * 2017-09-14 2020-04-10 株式会社藤仓 Leakage coaxial cable
CN110998975B (en) * 2017-09-14 2022-07-22 株式会社藤仓 Leakage coaxial cable
CN109003718A (en) * 2018-06-19 2018-12-14 江苏华能电缆股份有限公司 Robot hot dry rock charge bearing detecting cable
CN109003718B (en) * 2018-06-19 2024-04-16 江苏华能电缆股份有限公司 Dry-hot rock load-bearing detection cable for robot
CN112271014A (en) * 2020-09-23 2021-01-26 上海天诚通信技术股份有限公司 Foaming type one-to-one Ethernet twisted pair
CN115641992A (en) * 2022-11-15 2023-01-24 江苏华能电缆股份有限公司 Load-bearing detection cable and logging system

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