CN104464921A - Intrinsically safe explosion-proof cable - Google Patents
Intrinsically safe explosion-proof cable Download PDFInfo
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- CN104464921A CN104464921A CN201410826685.5A CN201410826685A CN104464921A CN 104464921 A CN104464921 A CN 104464921A CN 201410826685 A CN201410826685 A CN 201410826685A CN 104464921 A CN104464921 A CN 104464921A
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- cable
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- safe explosion
- core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention provides an intrinsically safe explosion-proof cable which comprises a conductor bundle, copper belt sub shielding layers and a steel belt total shielding layer. The conductor comprises one or more wires. The wires are twisted. Each bundle of conductor is coated with an insulation layer to form an insulation wire core. A plurality of wire cores are twisted to form a twisted wire core, and the twisted wire core is coated with one copper belt sub shielding layer. A plurality of twisted wire cores coated with the copper belt sub shielding layers are twisted to form a cable core. The cable core is coated with the steel belt total shielding layer. The intrinsically safe explosion-proof cable can shield electric signal interference and magnetic signal interference at the same time, and is good in explosion-proof performance.
Description
Technical field
The present invention relates to field of cables, particularly relate to a kind of inbeing safe explosion prevention cable.
Background technology
Inbeing safe explosion prevention cable (be called for short intrinsic safe explosion-proof cable) is a kind of novel product be derived on the basis of computer and instrument cable and plastic insulated cable.
Intrinsic safety type anti-explosion cable compares common computer and instrument cable and plastic insulated cable, need that there is shielding properties and interference free performance better, and when running in explosion environment, cable itself can not ignite the damp of surrounding, thus effective guarantee circuit keeps good running status in the explosive environment of appearance.
The key problem that intrinsic safety type anti-explosion cable mainly solves is: in the hybird environment of complexity, ensure that circuit can effectively transmit faint signal and medium is blasted around not causing, this just requires that intrinsic safety type anti-explosion cable not only has good anti-signal of telecommunication interference and the ability of magnetic signal interference, also will ensure that the signal of telecommunication that itself produces and magnetic signal can not cause the mixed media thing of surrounding to blast to outdiffusion simultaneously.
What intrinsic safety type anti-explosion cable transmitted is small-signal, if extraneous signal of telecommunication interference and magnetic signal interference effectively can not be shielded, tremendous influence will be produced to the Signal transmissions of whole circuit, if can not effectively shielding itself produce the signal of telecommunication and magnetic signal, these signals are blasted probably causing the mixed media of surrounding.
Therefore, how effectively can shield extraneous signal of telecommunication interference, magnetic signal interference and prevent the signal of telecommunication itself and magnetic signal medium diffusion be towards periphery the topmost technical barrier of intrinsic safety type anti-explosion cable.
The common computer instrument cable existed in prior art and plastic insulation control cables employing copper wire separated-shielding add the shielding construction that copper wire always shields, only can shield the interference of external circuit to the signal of telecommunication of cable itself, and the interference that in environment for use, magnetic signal produces it can not be shielded.
Therefore, urgently develop a kind of signal of telecommunication that can shield and disturb the intrinsic safety type anti-explosion cable that simultaneously can shield again magnetic signal interference.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: be coated with insulating barrier in the conductor outside comprising one or more wire, form insulated wire cores, many insulated wire cores are twisted into pair twist core, copper strips sub-shield is coated with in described pair twist core outside, many outsides are coated with the pair twist core twisted synthesizing cable core of copper strips sub-shield, the total screen of steel band is coated with in described cable core outside, thus enable this inbeing safe explosion prevention cable shield signal of telecommunication interference and magnetic signal interference simultaneously, avoid the electric spark produced due to the signal of telecommunication and/or magnetic signal, improve the fail safe that it uses, simultaneously, it also avoid the mutual interference of signal between cable.
The object of the invention is to provide following aspect:
First aspect, the invention provides a kind of inbeing safe explosion prevention cable, it is characterized in that, this cable comprises the total screen 3 of conductor 1, copper strips sub-shield 2 and steel band, wherein,
Described conductor 1 comprises one or more wire, and wherein, multiple conducting wires is stranded mutually;
Be coated with insulating barrier 12 in described conductor 1 outside, form insulated wire cores, many insulated wire cores are twisted into mutually pair twist core, are coated with copper strips sub-shield 2 in described pair twist core outside;
Many outsides are coated with the pair twist core twisted synthesizing cable core of copper strips sub-shield, are coated with the total screen 3 of steel band in described cable core outside.
Second aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, inner at the total screen 3 of described steel band, outside at described cable core, is also coated with band 21.
The third aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, inner at the total screen 3 of described steel band, outside at described band 21, is also coated with inner sheath 22.
Fourth aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, is extruded with oversheath 31 in the outside of the total screen 3 of steel band.
5th aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, described in every root, the cross section of wire is circle, and the outside dimension of every root wire is identical.
6th aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, cable comprises multifilament conductors 1, and in conductor described in multi beam 1, the radical of wire is mutually the same.
7th aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, in many described pair twist cores, the radical of insulated wire cores is equal to each other.
Eighth aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, copper strips sub-shield 2 is wrapped or vertical to wrap in described pair twist core outside.
9th aspect, the present invention also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, the total screen of steel band 3 is wrapped or vertical to wrap in described cable core outside.
Accompanying drawing explanation
Fig. 1 illustrates the structural representation of the inbeing safe explosion prevention cable according to a kind of preferred implementation of the present invention.
Drawing reference numeral illustrates:
1-conductor
12-insulating barrier
2-copper strips sub-shield
21-band
22-inner sheath
The total screen of 3-steel band
31-oversheath
Embodiment
Below by the present invention is described in detail, the features and advantages of the invention will illustrate along with these and become more clear, clear and definite.
Word " exemplary " special here means " as example, embodiment or illustrative ".Here need not be interpreted as being better than or being better than other embodiment as any embodiment illustrated by " exemplary ".Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, accompanying drawing need not be drawn in proportion.
Described in the present invention, vertical bag is method for coating conventional in this area, specifically, clad material (refers to copper strips in the present invention, steel band or band) width be more than or equal to insulated wire cores, the girth of pair twist core or cable core, make clad material axis along its length and insulated wire cores, the axis being parallel of pair twist core or cable core, in insulated wire cores, pair twist core or cable core outside are carried out coated, after coated, clad material axis along its length and insulated wire cores, the axis of pair twist core or cable core is still parallel, clad material is that tubular is closely coated on insulated wire cores, pair twist core or cable core outside.
Wrapped described in the present invention is method for coating conventional in this area, specifically, clad material is made (to refer to copper strips in the present invention, steel band or band) axis along its length and insulated wire cores, the axis of pair twist core or cable core becomes predetermined angular, in insulated wire cores, pair twist core or cable core outside are carried out dislocation and are wound around, namely the clad material of later layer is pressed on the clad material of front one deck, put up between adjacent two lapping layers, the wrapped rate of putting up is more than or equal to 50%, after wrapped, clad material is closely coated on insulated wire cores in the shape of a spiral, pair twist core or cable core outside, described predetermined angular is for being greater than and being not equal to 0, be less than and be not equal to 90 degree, the rate of putting up described in the present invention is technical term conventional in this area, and general expression later layer twister puts up the area ratio on front one deck twister.
In the present invention, described in extrude be method for coating conventional in this area, specifically, adopt the method for extruding, make to extrude the sheath obtained and can be coated on screen outside closely, make cable keep rounding.
Described in the present invention, the wire of several same diameter or different-diameter twists together by certain direction Sum fanction by stranded referring to, becomes as a whole stranded core.
The present invention is to provide a kind of inbeing safe explosion prevention cable simultaneously with the interference of the shielding signal of telecommunication and magnetic signal interference, referred to as intrinsic safe explosion-proof cable.
According in a preferred embodiment of the present invention, as shown in fig. 1, described intrinsic safe explosion-proof cable comprises the total screen 3 of conductor 1, copper strips sub-shield 2 and steel band.
In one preferred embodiment, as shown in Figure 1, described conductor 1 comprises one or more wire, wherein, multiple conducting wires is stranded mutually, and in one preferred embodiment, the cross section of every root wire is circle, in a preferred execution mode, the outside dimension of every root wire is identical.
One more preferred embodiment in, cable comprises multifilament conductors 1, in conductor described in multi beam 1, the radical of wire is mutually the same, and be preferably, in conductor 1 described in every root, the radical of wire is regular stranded radical, specifically, the wire storied placement in conductor 1, wherein, innermost layer is 1 wire, the second layer is 6 wires, from third layer, and every layer of 6 piece wire more than front one deck, if third layer is 12 wires, the 4th layer is 18 wires.
Described in every root, conductor 1 outside is coated with insulating barrier 12, form insulated wire cores, many insulated wire cores are twisted into mutually pair twist core, in the present invention, described pair twist core forms by the insulated wire cores of more than two or two is mutually stranded, is coated with copper strips sub-shield 2 in described pair twist core outside.
In one preferred embodiment, insulating barrier 12 is polyethylene layer or polyvinyl chloride insulation layer, the good insulation preformance of this insulating barrier 12.
In one preferred embodiment, as shown in fig. 1, in pair twist core described in every root, the radical of insulated wire cores is equal, more preferably, in pair twist core described in every root, includes 2 insulated wire cores.
In a preferred embodiment, copper strips sub-shield 2 is wrapped outside at described pair twist core, and in another kind of preferred implementation, copper strips sub-shield 2 is vertical wraps in described pair twist core outside.
Described copper strips sub-shield 2 can shielded type cable inside produce the signal of telecommunication, prevent it from producing signal of telecommunication interference to other cable and instrument and meter etc. in environment for use, simultaneously, the interference that the signal of telecommunication that copper strips sub-shield 2 can shield other cable and instrument and meter generation in environment for use produces intrinsic safety cable, thus avoid the electric spark caused by the signal of telecommunication, and then add explosion-proof performance when cable uses.
The pair twist core that many outsides are coated with copper strips sub-shield 2 is twisted into cable core mutually, is coated with the total screen 3 of steel band in described cable core outside.
In a preferred embodiment, as shown in fig. 1, in described cable core, 4 pair twist cores are comprised.
In a preferred embodiment, the total screen of steel band 3 is wrapped outside at described cable core, and in another kind of preferred implementation, the total screen of steel band 3 is vertical wraps in described cable core outside.
In a preferred embodiment, the total screen of steel band 3 is the total screen of galvanized steel strip, thus improves the corrosion resistance that steel band always shields 3, extends the useful life of intrinsic safety type anti-explosion cable.
In a preferred embodiment, as shown in Figure 1, always shield 3 inside at described steel band, be also coated with band 21 in described cable core outside, for making pair twist core in described cable core relatively fixing, following process when being convenient to produce cable.
The total screen 3 of steel band can shield from the interference of the magnetic signal in environment for use to cable, simultaneously can the interference that other cable, instrument, instrument etc. in environment for use are caused of the magnetic signal that produces of shielded type cable inside, avoid the spark caused because of magnetic signal to produce.
In further preferred embodiment, as shown in Figure 1, inner at the total screen 3 of described steel band, outside at described band 21, also being coated with inner sheath 22, for preventing the even scuffing that causes of cable core of the total screen of steel band 3 pairs of bands, extending the useful life of intrinsic safe explosion-proof cable, in a preferred embodiment, inner sheath 22 is extruded with in described band 21 outside; In another kind of preferred implementation, be surrounded with inner sheath 22 in described band 21 outside.
Being extruded with oversheath 31 in the outside of the total screen 3 of steel band, for preventing other object in environment for use from damaging cable, extending the useful life of intrinsic safe explosion-proof cable.
In one preferred embodiment, oversheath 31 is outer protective polyethylene cover, and its mechanical strength is large, shock resistance and survivability strong.
According to inbeing safe explosion prevention cable provided by the invention, there is following beneficial effect:
(1) electric capacity is low, inductance is low and it is strong to shield the electromagnetic signal ability self produced, and prevents from producing electromagnetic interference to other parts;
(2) shielding properties is superior, adopts copper strips split screen and steel band always to shield, shields the extraneous signal of telecommunication, magnetic signal, radio frequency interference and anti-field coupled, ensures that signal normal table transmits accurately;
(3) explosion-proof performance is superior, and explosive-proof grade meets GB GB3836.4-2000, uses this cable that circuit can not be caused to explode under explosive-proof grade occasion;
(4) screen corrosion resistance is strong, uses, extend the useful life of intrinsic safety type anti-explosion cable under being adapted at the environment of various kinds of media thing mixing;
(5) electric property is superior, the mutual capacitance of this cable than computer and instrument cable mutual capacitance little by about 10%, the inductance of this cable reduces about 40% than common cable;
(6) softness is excellent, and cable minimum bending radius is not less than 12 times of the outside diameter of cable;
(7) transport of this anti-explosion cable, installation and accessory are comparatively simple, are similar to common cable.
Test example
the performance test of test example 1 cable
The structure of this test example specimen in use as shown in Figure 1, sub-shield in plain edition instrument and meter cable used (contrast is used) is copper wire split screen (count 80%), and total screen is that copper wire always shields (count 80%);
This test example used test instrument is triumph instrument digital multimeter, and test result is as shown in table 1 below,
Table 1 cable performance test result
More than in conjunction with embodiment and exemplary example to invention has been detailed description, but these explanations can not be interpreted as limitation of the present invention.It will be appreciated by those skilled in the art that when not departing from spirit and scope of the invention, can carry out multiple equivalencing, modification or improvement to technical solution of the present invention and execution mode thereof, these all fall within the scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (9)
1. an inbeing safe explosion prevention cable, is characterized in that, this cable comprises conductor (1), copper strips sub-shield (2) and the total screen of steel band (3), wherein,
Described conductor (1) comprises one or more wire, and wherein, multiple conducting wires is mutually stranded;
Be coated with insulating barrier (12) in described conductor (1) outside, form insulated wire cores, many insulated wire cores are twisted into mutually pair twist core, are coated with copper strips sub-shield (2) in described pair twist core outside;
Many outsides are coated with the pair twist core twisted synthesizing cable core of copper strips sub-shield (2), are coated with the total screen of steel band (3) in described cable core outside.
2. inbeing safe explosion prevention cable according to claim 1, is characterized in that, inner at the total screen of described steel band (3), outside at described cable core, is also coated with band (21).
3. inbeing safe explosion prevention cable according to claim 1, is characterized in that, inner at the total screen of described steel band (3), outside at described band (21), is also coated with inner sheath (22).
4. inbeing safe explosion prevention cable according to claim 1, is characterized in that, is extruded with oversheath (31) in the total screen of steel band (3) outside.
5. inbeing safe explosion prevention cable according to claim 1, is characterized in that, the cross section of wire described in every root is circular, and the outside dimension of every root wire is identical.
6. inbeing safe explosion prevention cable according to claim 1, is characterized in that, cable comprises multifilament conductors (1), and in conductor described in multi beam (1), the radical of wire is mutually the same.
7. inbeing safe explosion prevention cable according to claim 1, is characterized in that, in many described pair twist cores, the radical of insulated wire cores is equal to each other.
8. inbeing safe explosion prevention cable according to claim 1, its spy is, copper strips sub-shield (2) is wrapped or vertical to wrap in described pair twist core outside.
9. inbeing safe explosion prevention cable according to claim 1, is characterized in that, the total screen of steel band (3) is wrapped or vertical to wrap in described cable core outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826685.5A CN104464921A (en) | 2014-12-24 | 2014-12-24 | Intrinsically safe explosion-proof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826685.5A CN104464921A (en) | 2014-12-24 | 2014-12-24 | Intrinsically safe explosion-proof cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104464921A true CN104464921A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410826685.5A Pending CN104464921A (en) | 2014-12-24 | 2014-12-24 | Intrinsically safe explosion-proof cable |
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| CN (1) | CN104464921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109937459A (en) * | 2016-10-27 | 2019-06-25 | 川崎重工业株式会社 | The composite cable of Sefe antiexplosion, have Sefe antiexplosion composite cable signal processing apparatus, have Sefe antiexplosion composite cable teaching machine and have Sefe antiexplosion composite cable robot |
-
2014
- 2014-12-24 CN CN201410826685.5A patent/CN104464921A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109937459A (en) * | 2016-10-27 | 2019-06-25 | 川崎重工业株式会社 | The composite cable of Sefe antiexplosion, have Sefe antiexplosion composite cable signal processing apparatus, have Sefe antiexplosion composite cable teaching machine and have Sefe antiexplosion composite cable robot |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
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| WD01 | Invention patent application deemed withdrawn after publication |