CN204270722U - A kind of inbeing safe explosion prevention cable - Google Patents
A kind of inbeing safe explosion prevention cable Download PDFInfo
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- CN204270722U CN204270722U CN201420837889.4U CN201420837889U CN204270722U CN 204270722 U CN204270722 U CN 204270722U CN 201420837889 U CN201420837889 U CN 201420837889U CN 204270722 U CN204270722 U CN 204270722U
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Abstract
The utility model provides a kind of inbeing safe explosion prevention cable, and this anti-explosion cable comprises conductor, insulating barrier, proof copper-wire braided sub-shield, the total screen of braided steel wire and sheath, and described conductor comprises one or more wire, and wherein, multiple conducting wires is stranded mutually; Described in every root, conductor outside is coated with insulating barrier, form insulated wire cores, many insulated wire cores are twisted into pair twist core, proof copper-wire braided sub-shield is coated with in described pair twist core outside, the total screen of braided steel wire is coated with in described proof copper-wire braided sub-shield outside, be extruded with sheath in the outside of the total screen of described braided steel wire, can shield signal of telecommunication interference and magnetic signal interference according to the inbeing safe explosion prevention cable that the utility model provides, explosion-proof performance is good simultaneously.
Description
Technical field
The utility model relates to a kind of cable, particularly relates 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.
At present, what common computer instrument cable and plastics control cables mainly adopted is that brass wire shielding structure is to shield signal of telecommunication interference and magnetic signal interference, but copper itself is diamagnetic substance, its relative permeability is 1, shield effectiveness for magnetic signal is not fine, this runs under making the environment of cable medium relative complex around exists very large risk, that is, circuit cannot be ensured in the hybird environment of complexity effectively to transmit faint signal and medium is blasted around not causing.
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.
For above-mentioned reasons, the present inventor conducts in-depth research existing cable technology, to expect that designing a kind of signal of telecommunication that can shield disturbs the intrinsic safety type anti-explosion cable that can shield again magnetic signal interference simultaneously.
Utility model content
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: at the outside coated insulation layer of the conductor comprising one or more wire, form insulated wire cores, many insulated wire cores are twisted into pair twist core, proof copper-wire braided sub-shield is coated with in described pair twist core outside, the total screen of braided steel wire is coated with in described proof copper-wire braided sub-shield outside, sheath is coated with in the outside of the total screen of described braided steel wire, 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.
Specifically, the utility model object is to provide following aspect:
First aspect, the utility model provides a kind of inbeing safe explosion prevention cable, it is characterized in that, this cable comprises conductor 1, insulating barrier 12, proof copper-wire braided sub-shield 2, the total screen 3 of braided steel wire and sheath 31, wherein,
Described conductor bundle 1 comprises one or more wire, and wherein, multiple conducting wires is stranded mutually;
Be coated with insulating barrier 12 in every Shu Suoshu conductor 1 outside, form insulated wire cores, many insulated wire cores are twisted into mutually pair twist core, are coated with proof copper-wire braided sub-shield 2 in described pair twist core outside;
Be coated with the total screen 3 of braided steel wire in proof copper-wire braided sub-shield 2 outside, be extruded with sheath 31 in braided steel wire total screen 3 outside.
Second aspect, the utility model also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, described proof copper-wire braided sub-shield 2 comprises one or more layers proof copper-wire braided net, count >=85% of described proof copper-wire braided net.
The third aspect, the utility model also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, the total screen 3 of described braided steel wire comprises one or more layers braided steel wire net, count >=85% of described braided steel wire net.
Fourth aspect, the utility model also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, outside at described pair twist core, inner in proof copper-wire braided sub-shield 2, is coated with the first belting layer 13.
5th aspect, the utility model also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, the outer wall of described proof copper-wire braided sub-shield 2 is coated with the second belting layer 21, many outsides are coated with the pair twist core twisted synthesizing cable core of proof copper-wire braided sub-shield 2.
6th aspect, the utility model also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, in the outside of described cable core, in the inside of the total screen 3 of braided steel wire, is coated with the 3rd belting layer 22.
7th aspect, the utility model 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.
Eighth aspect, the utility model 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.
9th aspect, the utility model also provides above-mentioned inbeing safe explosion prevention cable, it is characterized in that, in many described cable cores, the radical of insulated wire cores is equal to each other.
Accompanying drawing explanation
Fig. 1 illustrates the radial section structural representation of the inbeing safe explosion prevention cable according to a kind of preferred implementation of the utility model.
Drawing reference numeral illustrates:
1-conductor
12-insulating barrier
13-first belting layer
2-proof copper-wire braided sub-shield
21-second belting layer
22-the 3rd belting layer
The total screen of 3-braided steel wire
31-sheath
Embodiment
Be described in detail below by the utility model, feature of the present utility model and advantage 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.
In description of the present utility model, it should be noted that, term " first ", " second ", " the 3rd " etc. are only the utility model reach the effect of simplified characterization for convenience of description, avoid confusion, and can not be interpreted as instruction or hint relative importance.
Described in the utility model, vertical bag is method for coating conventional in this area, specifically, the width of clad material (at the utility model middle finger band) is 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 utility model is method for coating conventional in this area, specifically, make clad material (at the utility model middle finger 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 utility model 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 utility model, described in extrude be method for coating conventional in this area, specifically, adopt the method for extruding, making to extrude the sheath obtained, can be coated on the total screen of braided steel wire closely outside, makes cable keep rounding.
Stranded described in the utility model is winding method conventional in this area, specifically refers to and is twisted together by certain direction and certain rule by the wire of some same diameter or different-diameter, become as a whole stranded core.
The utility model provides 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 implementation of the present utility model, as shown in fig. 1, described intrinsic safe explosion-proof cable, comprises conductor 1, insulating barrier 12, proof copper-wire braided sub-shield 2, the total screen 3 of braided steel wire and sheath 31.
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, in described conductor 1, the radical of wire is mutually the same, and be preferably, in every Shu Suoshu conductor 1, the radical of wire is the regular stranded radical of conductor, 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.
Insulating barrier 12 is coated with in every Shu Suoshu conductor 1 outside, preferably be coated with insulating barrier 12 in every Shu Suoshu conductor 1 outside, form insulated wire cores, the many mutual stranded formation pair twist cores of insulated wire cores, in the utility model, described twisted pair wire forms by the insulated wire cores of more than two or two is mutually stranded, and many pair twist cores are twisted into cable core mutually, in one preferred embodiment, described cable core outer wall is coated with the first belting layer 13.
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 every root pair twist core, insulated wire cores number is identical, and more preferably, every root pair twist core comprises 2 insulated wire cores.
In one preferred embodiment, the first belting layer 13 is wrapped on described twisted pair wire outer core, and in another kind of preferred implementation, the first belting layer 13 is vertical to be wrapped on described twisted pair wire outer core.
Be coated with proof copper-wire braided sub-shield 2 in the first belting layer 13 outside, in a preferred embodiment, be coated with the second belting layer 21 in described proof copper-wire braided sub-shield 2 outside.
In one preferred embodiment, described proof copper-wire braided sub-shield 2 comprises one or more layers proof copper-wire braided net, is preferably 2 layers; Count >=85% of described proof copper-wire braided net, is preferably >=90%.
Described proof copper-wire braided sub-shield 2 can shielded type cable inside produce the signal of telecommunication, prevent it from producing interference to other cable and instrument and meter etc. in environment for use, simultaneously, the interference that the signal of telecommunication that proof copper-wire braided 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 interference signal of telecommunication, and then add explosion-proof performance when cable uses.
In one preferred embodiment, the second belting layer 21 is wrapped outside in described proof copper-wire braided sub-shield 2, and in another kind of preferred implementation, the second belting layer 21 is vertical wraps in described proof copper-wire braided sub-shield 2 outside.
Many outsides are coated with the pair twist core twisted synthesizing cable core of proof copper-wire braided sub-shield, are coated with the 3rd belting layer 22 in described cable core outside.
In one preferred embodiment, in cable core described in every root, the number of pair twist core is equal, is preferably 4.
In one preferred embodiment, the 3rd belting layer 22 is wrapped outside at described cable core, and in another kind of preferred implementation, the 3rd belting layer 22 is vertical wraps in described cable core outside.
Be coated with the total screen 3 of braided steel wire in the 3rd belting layer 22 outside, preferably, be extruded with sheath 31 in described braided steel wire total screen 3 outside.
In one preferred embodiment, the total screen 3 of described braided steel wire comprises one or more layers braided steel wire net, is preferably 2 layers; Count >=85% of described braided steel wire net, is preferably >=90%.
In a preferred embodiment, the total screen 3 of described braided steel wire is zinc-coated wire mesh grid, improves the corrosion resistance of the total screen 3 of braided steel wire, extends the useful life of intrinsic safety cable.
The total screen 3 of braided steel wire 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 interference magnetic signal to produce.
Extruding sheath 31 in the outside of the total screen 3 of braided steel wire, 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, sheath 31 is outer protective polyethylene cover, and its mechanical strength is large, shock resistance and survivability strong.
Specifically, according to the inbeing safe explosion prevention cable that the utility model provides, there is following beneficial effect:
(1) explosion-proof performance is superior, and explosive-proof grade meets GB GB3836.4-2000, meets and under the occasion of explosive-proof grade, uses this cable and do not cause circuit to blast phenomenon.
(2) shielding properties is superior, adopts proof copper-wire braided separated-shielding and the total screening energy of braided steel wire well to shield the interference of the extraneous signal of telecommunication and magnetic signal, ensures that signal normal table transmits accurately.
(3) screen corrosion resistance is strong, uses and does not cause circuit itself that any fault occurs, effectively extend the useful life of intrinsic safety type anti-explosion cable under being adapted at the environment of various kinds of media thing mixing.
(4) electric property is superior, the mutual capacitance of this cable with than computer and instrument cable mutual capacitance little by about 10%, the inductance of this cable reduces about 40% than common cable.
(5) softness is excellent, and cable minimum bending radius is not less than 8 times of the outside diameter of cable.
(6) transport of this anti-explosion cable, installation and accessory are comparatively simple, are similar to common cable.
(7) this anti-explosion cable is due to manufacture craft advanced person, installs simple, and the shielding of total screen employing braided steel wire, under equal conditions its comprehensive cost is low than the expense of common computer and instrument cable and plastic insulation control cables.
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, the utility model has been described in detail, but these explanations can not be interpreted as restriction of the present utility model.It will be appreciated by those skilled in the art that when not departing from the utility model spirit and scope, can carry out multiple equivalencing, modification or improvement to technical solutions of the utility model and execution mode thereof, these all fall in scope of the present utility model.Protection range of the present utility model is as the criterion with claims.
Claims (9)
1. an inbeing safe explosion prevention cable, it is characterized in that, this cable comprises conductor (1), insulating barrier (12), proof copper-wire braided sub-shield (2), the total screen of braided steel wire (3) and sheath (31), wherein
Described conductor (1) comprises one or more wire, and wherein, multiple conducting wires is stranded mutually;
Be coated with insulating barrier (12) in every Shu Suoshu conductor (1) outside, form insulated wire cores, many insulated wire cores are twisted into mutually pair twist core, are coated with proof copper-wire braided sub-shield (2) in described pair twist core outside;
Be coated with the total screen of braided steel wire (3) in proof copper-wire braided sub-shield (2) outside, be extruded with sheath (31) in the total screen of braided steel wire (3) outside.
2. inbeing safe explosion prevention cable according to claim 1, is characterized in that, described proof copper-wire braided sub-shield (2) comprises one or more layers proof copper-wire braided net, count >=85% of described proof copper-wire braided net.
3. inbeing safe explosion prevention cable according to claim 1, is characterized in that, the total screen of described braided steel wire (3) comprises one or more layers braided steel wire net, count >=85% of described braided steel wire net.
4. inbeing safe explosion prevention cable according to claim 1, is characterized in that, outside at described pair twist core, inner in proof copper-wire braided sub-shield (2), is coated with the first belting layer (13).
5. inbeing safe explosion prevention cable according to claim 1, it is characterized in that, the outer wall of described proof copper-wire braided sub-shield (2) is coated with the second belting layer (21), and many outsides are coated with the pair twist core twisted synthesizing cable core of proof copper-wire braided sub-shield (2).
6. according to the inbeing safe explosion prevention cable one of claim 1 to 5 Suo Shu, it is characterized in that, in the outside of described cable core, in the inside of the total screen of braided steel wire (3), be coated with the 3rd belting layer (22).
7. according to the inbeing safe explosion prevention cable one of claim 1 to 5 Suo Shu, 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.
8. according to the inbeing safe explosion prevention cable one of claim 1 to 5 Suo Shu, 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.
9. according to the inbeing safe explosion prevention cable one of claim 1 to 5 Suo Shu, it is characterized in that, in many described cable cores, the radical of insulated wire cores is equal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420837889.4U CN204270722U (en) | 2014-12-24 | 2014-12-24 | A kind of inbeing safe explosion prevention cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420837889.4U CN204270722U (en) | 2014-12-24 | 2014-12-24 | A kind of inbeing safe explosion prevention cable |
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| Publication Number | Publication Date |
|---|---|
| CN204270722U true CN204270722U (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420837889.4U Active CN204270722U (en) | 2014-12-24 | 2014-12-24 | A kind of inbeing safe explosion prevention cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117476276A (en) * | 2023-10-23 | 2024-01-30 | 广东新亚光电缆股份有限公司 | Cable with high explosion-proof and anti-electromagnetic interference characteristics |
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2014
- 2014-12-24 CN CN201420837889.4U patent/CN204270722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117476276A (en) * | 2023-10-23 | 2024-01-30 | 广东新亚光电缆股份有限公司 | Cable with high explosion-proof and anti-electromagnetic interference characteristics |
| CN117476276B (en) * | 2023-10-23 | 2024-04-23 | 广东新亚光电缆股份有限公司 | Cable with high explosion-proof and anti-electromagnetic interference characteristics |
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