CN104931190A - Non-glue mechanical sealing structure of fiber grating osmometer - Google Patents
Non-glue mechanical sealing structure of fiber grating osmometer Download PDFInfo
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- CN104931190A CN104931190A CN201510415707.3A CN201510415707A CN104931190A CN 104931190 A CN104931190 A CN 104931190A CN 201510415707 A CN201510415707 A CN 201510415707A CN 104931190 A CN104931190 A CN 104931190A
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Abstract
The present invention aims at overcoming the problems that poor stability, poor sealing effect and affected osmometer precision can be caused by adoption of a waterproof glue for sealing a fiber grating osmometer in the prior art, and provides a non-glue mechanical sealing structure of a fiber grating osmometer. The non-glue mechanical sealing structure is characterized in that the traditional waterproof glue is replaced by nylon tubes, pressure-resistant fast screwed joints and a heat shrinkable tube for sealing the fiber grating osmometer, and a support effect is achieved through a metal support tube. Due to special material thereof, the nylon tube can be resistant to 10Mpa pressure without serious deformation, thus the nylon tube is used as a protection sleeve of an optical fiber; the pressure-resistant fast screwed joint can achieve the sealing effect by extruding the nylon tube; the heat shrinkable tube is used for butt joint of an optical cable and the nylon tube, and achieves firm and reliable effects; and a hydraulic tong is used for extruding the metal support tube to achieve the sealing effect. The non-glue mechanical sealing structure of the present invention can solve the defects of poor long-term stability, and small pressure-resistant range of the sealing mode of a current sealant.
Description
Technical field
The invention belongs to sensory field of optic fibre, be specifically related to the glue-free pure mechanical seal structure of a kind of fiber bragg grating osmometer.
Background technology
Osmometer is mainly used in measuring fluid for a long time, hole, dykes and dams, subway, the pressure at the places such as bridge.The shortcomings such as now, great majority all adopt traditional electric class osmometer, and it is low that traditional electrical class osmometer exists measuring accuracy, and water resistance is poor, and the life-span is short, anti-electromagnetic interference capability difference; Fiber bragg grating osmometer can overcome the shortcoming of traditional electrical class osmometer, has measuring accuracy high, and measurement range is large, the plurality of advantages such as water resistance is high, electromagnetism interference.But grating osmometer under light on the market, use marine glue to increase water proofing property, because marine glue is under long-time measurement, stability can reduce gradually because of glue itself, and the withstand voltage scope of marine glue is little, so be badly in need of the strong fiber bragg grating osmometer hermetically-sealed construction of a kind of reliable stability at present.
Summary of the invention
Technical matters to be solved by this invention is that the fiber bragg grating osmometer overcoming prior art existence uses marine glue to seal the problem that poor stability, sealing effectiveness are not good, affect osmometer precision, provides a kind of fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize:
A kind of fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction, comprise a fiber bragg grating osmometer be made up of fiber grating, it is characterized in that a withstand voltage fast one-way joint of twisting is docked by screw thread with fiber bragg grating osmometer, the withstand voltage fast other end of twisting one-way joint is screw nut structure, by withstand voltage fast screw nut structure of twisting one-way joint, one end of first paragraph nylon tube sealing is arranged on the withstand voltage fast other end of twisting one-way joint, the optical fiber that fiber bragg grating osmometer stretches out passes from withstand voltage fast twisting one-way joint, for the fused fiber splice of two sections of fiber alignments is disposed in first paragraph nylon tube, the other end of first paragraph nylon tube and two ends are that withstand voltage fast one end of twisting bidirectional joint of screw nut structure is tightly connected, the withstand voltage fast other end of twisting bidirectional joint is tightly connected second segment nylon tube, optical fiber continues to pass from second segment nylon tube, on optical cable, cover has metallic support pipe, the method of metal crimp is adopted second segment nylon tube and optical cable to be crimped together, metallic support pipe and its outer corresponding second segment nylon tube are carried out mechanically deform thus form distortion place, distortion place reaches crush seal effect,
Further technical scheme comprises:
Marine glue is full of in first paragraph nylon tube;
Distortion place cover has heat-shrink tube to do outer protection.
Compared with prior art the invention has the beneficial effects as follows:
What now most of fiber bragg grating osmometer tail optical fiber fiber place still adopted on the market is the bonding guarantee sealing property relying on marine glue; because marine glue self-characteristic causes this kind of withstand voltage scope of method less; long-time stability are poor; the glue-free pure mechanical seal structure of a kind of fiber bragg grating osmometer of the present invention; the pressure-resistant seal problem of fiber bragg grating osmometer under water under 10Mpa environment is solved completely by the mode of mechanical presses, and the protection sealing problem of disposable solution fusion point.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the structural representation of the glue-free pure mechanical seal structure of a kind of fiber bragg grating osmometer of the present invention.
In figure: 1, withstand voltagely fast twist one-way joint, 2, withstand voltagely twist bidirectional joint soon, 3, second segment nylon tube, 4, fiber bragg grating osmometer, 5, metallic support pipe, 6, distortion place, 7, heat-shrink tube, 8, optical cable, 9, fused fiber splice place, 10, first paragraph nylon tube, 11, optical fiber.
Embodiment
Below in conjunction with accompanying drawing, the present invention is explained in detail:
A kind of fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction, comprise a fiber bragg grating osmometer be made up of fiber grating 4, it is characterized in that a withstand voltage fast one-way joint 1 of twisting is docked by screw thread with fiber bragg grating osmometer 4, the withstand voltage fast other end of twisting one-way joint 1 is screw nut structure, by withstand voltage fast screw nut structure of twisting one-way joint 1, one end of first paragraph nylon tube 10 sealing is arranged on the withstand voltage fast other end of twisting one-way joint 1, the optical fiber 11 that fiber bragg grating osmometer 4 stretches out passes from withstand voltage fast twisting one-way joint, fused fiber splice 9 is disposed in first paragraph nylon tube 10, the other end of first paragraph nylon tube 10 and two ends are that withstand voltage fast one end of twisting bidirectional joint 2 of screw nut structure is tightly connected, the withstand voltage fast other end of twisting bidirectional joint 2 is tightly connected second segment nylon tube 3, optical fiber 11 continues to pass from second segment nylon tube 3, on optical cable 8, cover has metallic support pipe 5, the method of metal crimp is adopted second segment nylon tube 3 and optical cable 8 to be crimped together, metallic support pipe 5 and its outer corresponding second segment nylon tube 3 are carried out mechanically deform thus form distortion place 6, distortion place 6 reaches crush seal effect, marine glue is full of in first paragraph nylon tube 10, heat-shrink tube 7 is had to do outer protection in distortion place 6 outer cover.
The operating process using a kind of fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction of the present invention to seal the optical fiber 11 in fiber bragg grating osmometer 4 and to protect is as follows:
The first step, is screwed in one end of fiber bragg grating osmometer 4 fiber by withstand voltage fast one end of twisting one-way joint 1;
Second step, to first paragraph nylon tube 10 carry out 80 degree softening after be enclosed within and withstand voltagely twist on one-way joint 1 soon;
3rd step, locked withstand voltage fast sealing nut of twisting one-way joint 1;
4th step, cuts down one section and prepares welding by the optical fiber in first paragraph nylon tube 10;
5th step, welding success, goes to protection;
6th step, adds that at fused fiber splice place 9 then resin plate plate fills ultraviolet glue in order to strengthen fixed fiber weld 9, after ultraviolet glue solidification, whole first paragraph nylon tube 10 two ends cavity and resin plate is full of 704 marine glues;
7th step; first paragraph nylon tube 10 and second segment nylon tube 3 to be docked and locked by withstand voltage fast bidirectional joint 2 of twisting, so far protect two easy points revealed by withstand voltage fast one-way joint 1 of twisting respectively with withstand voltage fast bidirectional joint 2 of twisting: the fused fiber splice place 9 that the tail end fiber place of fiber bragg grating osmometer 4 and optical fiber extend.
8th step; fiber bragg grating osmometer 4 root pressure larger part is by after above step protection; as shown in Figure 1; first metallic support pipe 5 is enclosed within second segment nylon tube 3; optical fiber pierces into second segment nylon tube 3; adopt hydraulic tongs by metallic support pipe 5 compressive strain thus form distortion place 6, reaching the effect of crush seal, finally do outer protection with heat-shrink tube 7.
Claims (3)
1. a fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction, comprise a fiber bragg grating osmometer be made up of fiber grating (4), it is characterized in that a withstand voltage fast one-way joint (1) of twisting is docked by screw thread with fiber bragg grating osmometer (4), the withstand voltage fast other end of twisting one-way joint (1) is screw nut structure, by withstand voltage fast screw nut structure of twisting one-way joint (1), one end of first paragraph nylon tube (10) sealing is arranged on the withstand voltage fast other end of twisting one-way joint (1), the optical fiber (11) that fiber bragg grating osmometer (4) stretches out passes from withstand voltage fast twisting one-way joint (1), fused fiber splice place (9) is placed in first paragraph nylon tube (10), the other end of first paragraph nylon tube (10) and two ends are that withstand voltage fast one end of twisting bidirectional joint (2) of screw nut structure is tightly connected, the withstand voltage fast other end of twisting bidirectional joint (2) is tightly connected second segment nylon tube (3), optical fiber (11) continues to pass from second segment nylon tube (3), metallic support pipe (5) is had at the upper cover of optical cable (8), the method of metal crimp is adopted second segment nylon tube (3) and optical cable (8) to be crimped together, metallic support pipe (5) and its outer corresponding second segment nylon tube (3) are carried out mechanically deform thus form distortion place (6), distortion place (6) reaches crush seal effect.
2., according to the said a kind of fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction of claim 1, it is characterized in that being full of marine glue in first paragraph nylon tube (10).
3., according to claim 1 or 2 said fiber bragg grating osmometer glue-free mechanical hermetically-sealed construction, it is characterized in that distortion place (6) outer cover has heat-shrink tube (7) to do outer protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415707.3A CN104931190B (en) | 2015-07-16 | 2015-07-16 | A kind of fiber bragg grating osmometer glue-free mechanical sealing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415707.3A CN104931190B (en) | 2015-07-16 | 2015-07-16 | A kind of fiber bragg grating osmometer glue-free mechanical sealing structure |
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| CN104931190A true CN104931190A (en) | 2015-09-23 |
| CN104931190B CN104931190B (en) | 2018-03-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068995A (en) * | 2016-02-26 | 2018-12-21 | 新宁研究院 | Image probe with rotatable core |
| CN109211797A (en) * | 2018-11-01 | 2019-01-15 | 北京航空航天大学 | A kind of fiber bragg grating temperature sensor with the anti-axial strain interference of temperature-compensating |
| CN109633818A (en) * | 2018-12-10 | 2019-04-16 | 河北汉光重工有限责任公司 | A kind of optical fibre gyro optical fiber welding point protection method and device |
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| US5185844A (en) * | 1991-07-29 | 1993-02-09 | At&T Bell Laboratories | Closure for optical fiber connective arrangements and method of providing same |
| CN101545817A (en) * | 2009-04-30 | 2009-09-30 | 山东省科学院激光研究所 | Fiber grating osmotic pressure sensor with low measuring range |
| CN201327988Y (en) * | 2008-12-17 | 2009-10-14 | 古叶辉 | Pre-insulated butt pipe |
| CN101915966A (en) * | 2010-07-14 | 2010-12-15 | 中国科学院半导体研究所 | Downhole optical cable connecting and protecting device |
| CN102103028A (en) * | 2009-12-16 | 2011-06-22 | 中国石油天然气股份有限公司 | Sealing method of optical fiber pressure sensor |
| CN102109643A (en) * | 2011-02-18 | 2011-06-29 | 深圳市特发信息光网科技股份有限公司 | Optical fiber quick coupling and splicing method thereof |
| CN104155726A (en) * | 2014-08-22 | 2014-11-19 | 北京卫星环境工程研究所 | High-air-tightness multi-core optical fiber through-cabin sealing connector |
| CN204788771U (en) * | 2015-07-16 | 2015-11-18 | 吉林大学 | Fiber grating osmometer does not have gluey mechanical seal structure |
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2015
- 2015-07-16 CN CN201510415707.3A patent/CN104931190B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5185844A (en) * | 1991-07-29 | 1993-02-09 | At&T Bell Laboratories | Closure for optical fiber connective arrangements and method of providing same |
| CN201327988Y (en) * | 2008-12-17 | 2009-10-14 | 古叶辉 | Pre-insulated butt pipe |
| CN101545817A (en) * | 2009-04-30 | 2009-09-30 | 山东省科学院激光研究所 | Fiber grating osmotic pressure sensor with low measuring range |
| CN102103028A (en) * | 2009-12-16 | 2011-06-22 | 中国石油天然气股份有限公司 | Sealing method of optical fiber pressure sensor |
| CN101915966A (en) * | 2010-07-14 | 2010-12-15 | 中国科学院半导体研究所 | Downhole optical cable connecting and protecting device |
| CN102109643A (en) * | 2011-02-18 | 2011-06-29 | 深圳市特发信息光网科技股份有限公司 | Optical fiber quick coupling and splicing method thereof |
| CN104155726A (en) * | 2014-08-22 | 2014-11-19 | 北京卫星环境工程研究所 | High-air-tightness multi-core optical fiber through-cabin sealing connector |
| CN204788771U (en) * | 2015-07-16 | 2015-11-18 | 吉林大学 | Fiber grating osmometer does not have gluey mechanical seal structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068995A (en) * | 2016-02-26 | 2018-12-21 | 新宁研究院 | Image probe with rotatable core |
| CN109211797A (en) * | 2018-11-01 | 2019-01-15 | 北京航空航天大学 | A kind of fiber bragg grating temperature sensor with the anti-axial strain interference of temperature-compensating |
| CN109633818A (en) * | 2018-12-10 | 2019-04-16 | 河北汉光重工有限责任公司 | A kind of optical fibre gyro optical fiber welding point protection method and device |
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| Publication number | Publication date |
|---|---|
| CN104931190B (en) | 2018-03-09 |
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