CN101694787B - Novel coaxial cable and a manufacture method thereof for video security monitoring and control - Google Patents
Novel coaxial cable and a manufacture method thereof for video security monitoring and control Download PDFInfo
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- CN101694787B CN101694787B CN2009101907640A CN200910190764A CN101694787B CN 101694787 B CN101694787 B CN 101694787B CN 2009101907640 A CN2009101907640 A CN 2009101907640A CN 200910190764 A CN200910190764 A CN 200910190764A CN 101694787 B CN101694787 B CN 101694787B
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- coaxial cable
- colloidal sol
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- polyurethane colloidal
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 7
- 229920002635 polyurethane Polymers 0.000 claims abstract description 36
- 239000004814 polyurethane Substances 0.000 claims abstract description 36
- 239000004020 conductor Substances 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 6
- 238000007757 hot melt coating Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 9
- 238000009422 external insulation Methods 0.000 abstract description 3
- 238000009421 internal insulation Methods 0.000 abstract 2
- 230000010354 integration Effects 0.000 abstract 1
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- 238000007664 blowing Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
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- 229920000573 polyethylene Polymers 0.000 description 1
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Abstract
The invention relates to the field of cables for video security monitoring and control, in particular to a novel coaxial cable and a manufacture method thereof for video security monitoring and control. The novel coaxial cable comprises a conductor and a sheath layer, wherein the outer side of the conductor is an internal insulation layer, the outer side of the internal insulation layer is provided with a metal screen layer, and polyurethane sol is used to integrally fill and shape between the metal screen layer and the sheath layer. The invention has the advantages that the polyurethane sol is used for shaping and guarding between an external insulation layer of a signal line and the sheath layer as well as the screen layer to enable shaped coaxial cable to form integration, thereby improving the processing quality of the cable during the manufacturing process, reducing the degree of irregularity of the conductor or central conductor eccentric amount, and lowering return loss, namely the impedance which affects the cable; and the method is easy to be standardized in construction, enables the appearance of the cable not to be damaged easily, and ensures the impedance and screen characteristics of the cable.
Description
Technical field
The present invention relates to video safety monitoring field of cables, refer more particularly to a kind of novel coaxial cable and production method thereof that is used for the video safety monitoring.
Background technology
Along with the continuous progress of society, industry-by-industry since U.S.'s Bell Laboratory nineteen twenty-nine invention coaxial cable, has passed through many decades history all in develop rapidly.In the meantime, coaxial cable has passed through repeatedly to improve.First generation cable adopts solid material as filled media, because it is big to high frequency attenuation, mainly it is used for transmission video signal usually now.People adopted polyethylene the chemical method foaming as filled media afterwards.Its foam degrees can reach 30%, and the high-frequency transmission characteristic increases.We call second generation cable to this.The eighties, the vertical hole of third generation cable with porous core occurs, and its high frequency attenuation reaches the level of present novel cable.But the moisture barrier properties comprises of chemical blowing cable and vertical hole cable with porous core is all bad.At the beginning of the nineties, physical blowing cable and ring cable have been released in market.We be called the 4th generation cable.Though ring cable energy is moistureproof and high-frequency loss is low, medium has inhomogeneities, at high frequency pip is arranged.Unmanned afterwards the use.The foam degrees of physical blowing cable can reach 80%.The medium main component is a nitrogen, between the bubble is to isolate mutually.Therefore, it has moistureproof and low-loss characteristics, is the best coaxial cable of present composite characteristic.
The coaxial cable schematic diagram comprises the signal of Electric Field Distribution and Distribution of Magnetic Field as depicted in figs. 1 and 2 in the drawings.The coaxial cable part that also comes with some shortcomings but, mainly cause cable to break away from nominal impedance in design with in producing or cable resistance inhomogeneous, all can cause the mismatch loss of signal.In construction, cause overbending, distortion, damage and the joint water inlet of cable, also can cause mismatch loss.The characteristic impedance of coaxial cable is relevant with cable geometry, and it influences equivalent capacity in the cable and inductance decision, and these equivalent capacitys and inductance are again by the dielectric constant decision of internal and external conductor diameter and medium.Generally speaking can produce the irregular or center conductor eccentricity issues (having reduced the reflection loss that influences cable is impedance) of conductor circularity in the conventional video safety monitoring cable production process; The impedance operator of cable and the problem of shielding character have been destroyed with distortion of the cable in construction.
Based on the weak point of above-mentioned existing outdoor electrical equipment distribution and signal control line, the inventor has designed the present invention's a kind of " novel coaxial cable of video safety monitoring and production method thereof ".
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art technical problem to be solved is: novel coaxial cable and production method thereof that a kind of video safety monitoring is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of novel coaxial cable of video safety monitoring comprises conductor and restrictive coating, and the outside of conductor is an internal insulating layer, and the described internal insulating layer outside is provided with metal screen layer, carries out integral-filled typing with polyurethane colloidal sol between metal screen layer and the restrictive coating.Utilize the polyurethane-hot melt sizing material when the lead stranding, will to finalize the design with the polyurethane-hot melt sizing material between the internal insulating layer of distribution power supply and signal control line and the restrictive coating (comprising filler) and protect.
Described restrictive coating is the PVC layer, with polyurethane colloidal sol complete filling, does not have air gap between PVC layer and the internal insulating layer.Air-gap between wire sheath PVC layer and the internal insulating layer (comprising filler) is eliminated, and should not produce be full of cracks.
A kind of novel coaxial cable production method of above-mentioned video safety monitoring is at first made polyurethane colloidal sol, and the proportion of described polyurethane colloidal sol is 1.14g/cm
3, the open hour of polyurethane colloidal sol are 35-60S second, and thickness is 0.03m, and temperature is 25 ℃.
Described polyurethane colloidal sol is applied to glue between internal insulating layer and the restrictive coating with cylinder formula hot melt coating gun, and the applying glue working temperature of polyurethane colloidal sol is＜130 ℃.Reaction type polyurethane hot-melt adhesive is a series of adjustable in actual working time, and has the adhesive of strong bonding force.The effective time that has 2 to 10 minutes behind the gluing is applicable to the bonding of multiple material, comprises metal material and nonmetallic materials, has good thermal endurance and hydrolytic resistance, utilizes cylinder formula hot melt coating gun gluing.
Described polyurethane colloidal sol is Off-white solid.
Described polyurethane colloidal sol is 12 ± 1pa.s 120 ℃ viscosity.
The serviceability temperature of described polyurethane colloidal sol after curing is＜120 ℃.
Principle of the present invention is to finalize the design with polyurethane colloidal sol between the external insulation of holding wire and restrictive coating and screen and to protect, make the coaxial cable of moulding constitute whole, improved cable crudy in process of production, reduced the irregular or center conductor offset of conductor circularity, having reduced the reflection loss that influences cable is impedance; And in construction, be easy to standardized work, make the external form of cable should not destroy impedance operator and the shielding character that has guaranteed cable.(arbitrarily lead is screwed in together when preventing the cable connection and gets over, must adopt supporting specific purpose tool) connects.The globality of cable has reduced mismatch loss, physical structure main and coaxial cable is closely related, if coaxial cable causes cable to break away from nominal impedance or the mismatch loss of the inhomogeneous signal that causes of cable resistance, the overbending that causes cable in construction, distortion, damage and joint water inlet, the mismatch loss that causes in design with in producing.
The novel coaxial cable of a kind of video safety monitoring of the present invention and the beneficial effect of production method thereof are:
To finalize the design with polyurethane colloidal sol between the external insulation of holding wire and restrictive coating and screen and protect, make the coaxial cable of moulding constitute whole, improved cable crudy in process of production, reduced the irregular or center conductor offset of conductor circularity, having reduced the reflection loss that influences cable is impedance; And in construction, be easy to standardized work, make the external form of cable should not destroy impedance operator and the shielding character that has guaranteed cable.(arbitrarily lead is screwed in together when preventing the cable connection and gets over, must adopt supporting specific purpose tool).
The globality of coaxial cable has reduced mismatch loss, and (physical structure main and coaxial cable is closely related, if coaxial cable causes cable to break away from nominal impedance or the mismatch loss of the inhomogeneous signal that causes of cable resistance, the overbending that causes cable in construction, distortion, damage and joint water inlet, the mismatch loss that causes in design with in producing).
Have following characteristics:
1. improved cable crudy in process of production, reduced the irregular or center conductor offset of conductor circularity, having reduced the reflection loss that influences cable is impedance; The globality of coaxial cable has reduced mismatch loss.(physical structure main and coaxial cable is closely related, if coaxial cable causes cable to break away from the mismatch loss of nominal impedance or the inhomogeneous signal that causes of cable resistance in design with in producing)
2. solved the problem during the video safety monitoring uses;
In construction, cause overbending, distortion, damage and the joint water inlet of cable, the mismatch loss that causes, make the external form of cable should not destroy impedance operator and the shielding character that has guaranteed cable, arbitrarily lead is screwed in together when preventing the cable connection and gets over, must adopt supporting specific purpose tool to connect, be easy to standardized work in the construction.
3. reduce engineering cost approximately, promoted social benefit (energy-conserving and environment-protective) simultaneously.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a coaxial cable cross section field distribution schematic diagram;
Fig. 2 is a coaxial cable longitudinal field distribution schematic diagram;
Fig. 3 is a cross section structure schematic diagram of the present invention.
Description of reference numerals:
10, oversheath 20, heart yearn 30, inner insulating layer
40, polyurethane colloidal sol 50, metal screen layer
Embodiment
With reference to Fig. 3, the present invention implements like this:
In Fig. 3, a kind of novel coaxial cable of video safety monitoring, comprise conductor 20 and restrictive coating 10, the outside of conductor 20 is an internal insulating layer 30, described internal insulating layer 30 outsides are provided with metal screen layer 50, carry out integral-filled typing with polyurethane colloidal sol 40 between metal screen layer 50 and the restrictive coating 10.
The novel coaxial cable production method of above-mentioned video safety monitoring is, at first makes polyurethane colloidal sol 40, and the proportion of described polyurethane colloidal sol 40 is 1.14g/cm
3, the open hour of polyurethane colloidal sol 40 are 35-60S second, and thickness is 0.03m, and temperature is 25 ℃.
Polyurethane colloidal sol 40 usefulness cylinder formula hot melt coating guns are applied to glue between internal insulating layer and the restrictive coating, and the applying glue working temperature of polyurethane colloidal sol is＜130 ℃.Polyurethane colloidal sol 40 is Off-white solid.Polyurethane colloidal sol 40 is 12 ± 1pa.s 120 ℃ viscosity.The serviceability temperature of polyurethane colloidal sol 40 after curing is＜120 ℃.
The above, only be the novel coaxial cable of video safety monitoring of the present invention and a kind of preferred embodiment of production method thereof, be not that technical scope of the present invention is imposed any restrictions, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention above any trickle modification, equivalent variations and modification that embodiment did.
Claims (6)
1. the novel coaxial cable of a video safety monitoring, comprise conductor (20) and restrictive coating (10), the outside of conductor (20) is internal insulating layer (30), it is characterized in that: described internal insulating layer (30) outside is provided with metal screen layer (50), carry out integral-filled typing with polyurethane colloidal sol (40) between metal screen layer (50) and the restrictive coating (10), and described restrictive coating (10) is the PVC layer, with polyurethane colloidal sol (40) complete filling, there is not air gap between PVC layer and the internal insulating layer (30).
2. the novel coaxial cable production method of a video safety monitoring as claimed in claim 1, it is characterized in that: at first make polyurethane colloidal sol (40), the proportion of described polyurethane colloidal sol (40) is 1.14g/cm
3, the open hour of polyurethane colloidal sol (40) are 35-60S second, and thickness is 0.03m, and temperature is 25 ℃.
3. the novel coaxial cable production method of video safety monitoring according to claim 2, it is characterized in that described polyurethane colloidal sol (40) is applied to glue between internal insulating layer and the restrictive coating with cylinder formula hot melt coating gun, the applying glue working temperature of polyurethane colloidal sol is＜130 ℃.
4. the novel coaxial cable production method of video safety monitoring according to claim 2 is characterized in that described polyurethane colloidal sol (40) is Off-white solid.
5. the novel coaxial cable production method of video safety monitoring according to claim 2 is characterized in that described polyurethane colloidal sol (40) is 12 ± 1pa.s 120 ℃ viscosity.
6. the novel coaxial cable production method of video safety monitoring according to claim 2 is characterized in that the serviceability temperature of described polyurethane colloidal sol (40) after curing is＜120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101907640A CN101694787B (en) | 2009-09-28 | 2009-09-28 | Novel coaxial cable and a manufacture method thereof for video security monitoring and control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101907640A CN101694787B (en) | 2009-09-28 | 2009-09-28 | Novel coaxial cable and a manufacture method thereof for video security monitoring and control |
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| Publication Number | Publication Date |
|---|---|
| CN101694787A CN101694787A (en) | 2010-04-14 |
| CN101694787B true CN101694787B (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101907640A Active CN101694787B (en) | 2009-09-28 | 2009-09-28 | Novel coaxial cable and a manufacture method thereof for video security monitoring and control |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2947082A1 (en) * | 1979-11-22 | 1981-05-27 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Cable screen corrosion prevention - uses jelly filling around screen wires which exudes if sheath fracture occurs |
| US4866212A (en) * | 1988-03-24 | 1989-09-12 | W. L. Gore & Associates, Inc. | Low dielectric constant reinforced coaxial electric cable |
| CN1308964C (en) * | 1997-05-15 | 2007-04-04 | 皮雷利·卡维系统有限公司 | Cable with impact-resistant coating |
| CN201600955U (en) * | 2009-09-28 | 2010-10-06 | 深圳市联嘉祥科技股份有限公司 | Novel coaxial cable for video security monitoring |
-
2009
- 2009-09-28 CN CN2009101907640A patent/CN101694787B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2947082A1 (en) * | 1979-11-22 | 1981-05-27 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Cable screen corrosion prevention - uses jelly filling around screen wires which exudes if sheath fracture occurs |
| US4866212A (en) * | 1988-03-24 | 1989-09-12 | W. L. Gore & Associates, Inc. | Low dielectric constant reinforced coaxial electric cable |
| CN1308964C (en) * | 1997-05-15 | 2007-04-04 | 皮雷利·卡维系统有限公司 | Cable with impact-resistant coating |
| CN201600955U (en) * | 2009-09-28 | 2010-10-06 | 深圳市联嘉祥科技股份有限公司 | Novel coaxial cable for video security monitoring |
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| CN101694787A (en) | 2010-04-14 |
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Denomination of invention: Novel coaxial cable and a manufacture method thereof for video security monitoring and control Effective date of registration: 20140819 Granted publication date: 20110921 Pledgee: Shenzhen SME credit financing guarantee Group Co.,Ltd. Pledgor: SHENZHEN LIANJIAXIANG SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: 2014990000669 |
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Date of cancellation: 20220620 Granted publication date: 20110921 Pledgee: Shenzhen SME credit financing guarantee Group Co.,Ltd. Pledgor: SHENZHEN LIANJIAXIANG SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: 2014990000669 |
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Denomination of invention: A new type of coaxial cable for video security monitoring and its production method Effective date of registration: 20220817 Granted publication date: 20110921 Pledgee: Bank of Communications Limited Shenzhen Branch Pledgor: SHENZHEN LIANJIAXIANG SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2022440020165 |
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Granted publication date: 20110921 Pledgee: Bank of Communications Limited Shenzhen Branch Pledgor: SHENZHEN LIANJIAXIANG SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2022440020165 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
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Denomination of invention: New coaxial cable for video security monitoring and its production method Granted publication date: 20110921 Pledgee: Bank of Communications Limited Shenzhen Branch Pledgor: SHENZHEN LIANJIAXIANG SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2024980036242 |
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