CN1008832B - The gas closure device of heat-shrinkable tube of optical fiber cable - Google Patents
The gas closure device of heat-shrinkable tube of optical fiber cableInfo
- Publication number
- CN1008832B CN1008832B CN 88106563 CN88106563A CN1008832B CN 1008832 B CN1008832 B CN 1008832B CN 88106563 CN88106563 CN 88106563 CN 88106563 A CN88106563 A CN 88106563A CN 1008832 B CN1008832 B CN 1008832B
- Authority
- CN
- China
- Prior art keywords
- gas
- heat
- tight
- optical fiber
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention is in the gas-tight pressurized capsule that is formed by parts such as seal sleeve, end plate, fairlead and O-ring seals, adopts heat-shrink tube that optical fiber cable is sealed, and makes that gas is from the pressure of tube wall to tube core to the acting force that seals with heat-shrink tube in the cabin in.Apparatus structure is simple, inner gas pressure is high, and airtight effect is good, parts handling ease, easy to use and maintenance.The present invention also can expand the relevant gas-tight device that is used for electric wire, cable.
Description
The present invention relates to a kind of gas-tight device of optical fiber cable.
For to the optical cable inflation, carry out air pressure and safeguard, perhaps optical repeater is carried out air pressure and safeguard, perhaps when optical cable advances office's one-tenth end, with gas-tight block circuit is disconnected usually, make it to be divided into two or more separate airtight spaces.Gas-tight block or the space that communicates with it can be inflated, and the pressure of inflating all is higher than ambient atmosphere pressure, leak to prevent contingent water, cause in water entry-line or the cabinet, line fault occurs.People are referred to as hyperbaric chamber with the gas-tight device cavity of the projecting ambient atmosphere pressure of air pressure habitually.The gas-tight device of optical fiber cable adopts casting method or rubber self sealss method to carry out gas-tight more at present, the Japan clear 61-48682 of special permission bulletin discloses a kind of gas check of telecommunication cable, it is by airtight sleeve, in the gas-tight cabin that end plate and O-ring seal etc. are formed, utilize the aperture of core wire through hole on the rubber elastomer to form the airtight construction that is similar to bicycle valve core less than the cable core external diameter that passes through hole.This gas-tight device can bear certain sealing air pressure, and result of use is better, but the apparatus structure complexity, parts are more, and especially the caoutchouc elasticity shape is special, and production technology realizes difficulty, is difficult for penetration and promotion.
Existing at present employing heat-shrink tube seals cable splice, and its method is referring to Fig. 1.The two ends of heat-shrink tube 2 closely stick among the figure needs on the airtight cable 4, the gas pressure that the inflation back forms in the heat-shrink tube 2 is on the heat-shrink tube inwall, pipe envelope part to heat-shrink tube produces the peeling force (shown in arrow among Fig. 1) of tearing from inside to outside, therefore, the air pressure that this sealing means can bear is limited, can not satisfy the requirement that air pressure is safeguarded.
The purpose of this invention is to provide the gas-tight device of optical fiber cable that a kind of airtight effect is good, design of part simple, easy processing realizes.
The present invention is achieved in that employing is by seal sleeve, end plate, be positioned at optical fiber on the end plate (optical cable) fairlead, O-ring seal and heat-shrink tube are formed gas-tight pressurized capsule, the both sides that it is characterized in that end plate are installed with fairlead, adopt an end heat shrink of heat-shrink tube to stick on the optical fiber cable, the other end also heat shrink sticks on the end plate fairlead, optical fiber cable is realized gas-tight sealing, the gas that is filled in the gas-tight pressurized capsule is from the pressure (as Fig. 2 arrow shown in) of tube wall to tube core to the acting force that seals with heat-shrink tube, thereby make gas-tight device of the present invention can tolerate higher inner gas pressure, meet in the communication line service regulations the requirement of air pressure, guarantee airtight reliability.
Accompanying drawing of the present invention has five, wherein:
Fig. 1 is the schematic diagram of the gas-tight device of prior art cable heat-shrink tube joint.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is tip plate configurations figure of the present invention.
Fig. 4 is the schematic diagram that the present invention is used for drawing from optical cable the gas-tight device embodiment of simple optical fiber.
Fig. 5 is the schematic diagram that the present invention is used for drawing from optical cable the gas-tight device embodiment of multiply optical fiber.
Below in conjunction with drawings and Examples, the present invention will be described in detail.
1 is pressurized capsule among Fig. 2, is filled with the gas that is higher than ambient atmosphere pressure in the cabin.2 and 8 all is heat-shrink tube, and they are that an end sticks on the optical fiber cable, and the other end sticks on the end plate fairlead, makes it collapsed seal, just can realize gas-tight to optical fiber cable.And the hyperbaric chamber internal gas pressure is from the pressure of tube wall to tube core to the acting force of heat-shrink tube, helps the reliability that guarantees that optical fiber cable is airtight.
Fig. 3 is the pressurized capsule strength member-tip plate configurations figure among the present invention.The 9th, end plate is slim garden plate-like, and two side planes should be processed straight, be uniform-distribution with single on it or several fairleads 10, fairlead is fixedly mounted on both sides, end plate plane and stretches out certain-length for thin-walled garden pipe, and its aperture is slightly larger than the optical cable that need pass its hole, the external diameter of optical fiber.If advance the end plate of optical cable, be generally single fairlead; Going out fairlead number on the end plate of optical fiber then has and has fewly more, depends on the needs.These part available metal made of end plate, fairlead and seal sleeve, also available high-intensity engineering plastics or compound substance manufacturing.O-ring seal is that heat-shrink tube then adopts macromolecular material manufacturings such as polyolefin, synthetic rubber or poly-fluororesin with macromolecular material manufacturings such as natural rubber, synthetic rubber.
Fig. 4 is one of embodiments of the invention.The Kong Bingyu that the optical cable 4 that enters gas-tight device is passed the fairlead 7 on the end plate 6 reserves enough length, with the big heat-shrink tube 2a of respective diameters size and 2b respectively with optical cable 4 fixing seals on the left and right sides of end plate 6 fairlead 7, the length that heat-shrink tube 2a and 2b are overlapped on optical cable 4 and the fairlead 7 should be about equally.Then, the optical cable 4 that enters gas-tight device is divested oversheath, remove cable core band and packing material, simple optical fiber 5 is disperseed, makes in order, numbers, and the heat-shrink tube 8a that puts corresponding size on every optical fiber respectively passes the hole with optical fiber corresponding fairlead 10 from another end plate 9 of gas-tight device again, then heat-shrink tube 8a and 8b are moved on to the intersection of optical fiber and fairlead 10, make equally heat-shrink tube and optical fiber the lap of splice and with the lap of splice of fairlead about equally.At this moment, make the heat-shrink tube collapsed seal just can finish sealing to optical fiber.In order to make the end plate both sides can both play the gas-tight effect of sealing well, it is airtight all to adopt heat-shrink tube to guarantee on the fairlead of end plate both sides.By Design of Mechanical Structure, use again
Methods such as RunddichtringO 19, make two end plates 6 and 9 and seal sleeve 11 be connected into air-tight cabin, the gas that charges into required air pressure forms hyperbaric chamber.So just constituted a complete gas-tight device.
The optical cable that enters the cabin body can be one, also can be many.Many are advanced cable in this way, also dispose the fairlead of respective numbers on the end plate 6, and gas-tight method is the same.
The embodiment that draws the gas-tight device of multiply optical fiber from optical cable is provided by Fig. 5.Its principle method is to above-mentioned similar.10 is fairlead on the end plate 9 among the figure, and 12 is the hot melt pipe on the optical fiber, and 13 is wire harness, and the multiply fibre bundle is become a bundle.
Apparatus structure of the present invention is simple, the inner gas pressure height, and airtight effect is good, and parts are processed realization easily, easy to use and maintenance.Through nearly 2 years practice test, prove a kind of gas-tight device that the optical cable inflation of applications well prospect is quite arranged, can be used as the gas-tight block or the optical repeater gas-tight block of optical cable.The present invention also can expand the relevant gas-tight device that is used for electric wire, cable.
Claims (5)
1, a kind of gas closure device of heat-shrinkable tube of optical fiber cable, form gas-tight pressurized capsule by seal sleeve, end plate, optical fiber (optical cable) fairlead, O-ring seal and the heat-shrink tube that are positioned on the end plate, the both sides that it is characterized in that end plate are installed with fairlead, adopt an end heat shrink of heat-shrink tube to stick on the optical fiber cable, the other end also heat shrink sticks on the end plate fairlead, optical fiber cable is realized gas-tight sealing, and the gas that is filled in the gas-tight pressurized capsule is from the pressure of tube wall to tube core to the acting force that seals with heat-shrink tube.
2, gas-tight device according to claim 1 is characterized in that heat-shrink tube is to adopt macromolecular materials such as polyolefin, synthetic rubber and poly-fluororesin to make.
3, gas-tight device according to claim 1 is characterized in that heat-shrink tube is divided into two or more separate airtight spaces with optical cable in gas-tight pressurized capsule, inflates in these spaces to press to be higher than ambient atmosphere pressure.
4, gas-tight device according to claim 1, it is characterized in that can be as the gas-tight block of optical fiber cable gas-tight block or repeater.
5, gas-tight device according to claim 1 is characterized in that except that being applicable to optical fiber cable, also can expand the gas-tight device that is used for electric wire, cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106563 CN1008832B (en) | 1988-09-29 | 1988-09-29 | The gas closure device of heat-shrinkable tube of optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106563 CN1008832B (en) | 1988-09-29 | 1988-09-29 | The gas closure device of heat-shrinkable tube of optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031765A CN1031765A (en) | 1989-03-15 |
| CN1008832B true CN1008832B (en) | 1990-07-18 |
Family
ID=4834288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88106563 Expired CN1008832B (en) | 1988-09-29 | 1988-09-29 | The gas closure device of heat-shrinkable tube of optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008832B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661036A (en) * | 2018-06-11 | 2018-10-16 | 浙江工业大学 | A kind of absorption type sealing device |
-
1988
- 1988-09-29 CN CN 88106563 patent/CN1008832B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031765A (en) | 1989-03-15 |
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| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |