CN104296915A - Device and method for monitoring tension of underwater umbilical cable - Google Patents
Device and method for monitoring tension of underwater umbilical cable Download PDFInfo
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- CN104296915A CN104296915A CN201410559031.0A CN201410559031A CN104296915A CN 104296915 A CN104296915 A CN 104296915A CN 201410559031 A CN201410559031 A CN 201410559031A CN 104296915 A CN104296915 A CN 104296915A
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Abstract
The invention relates to a device and method for monitoring the tension of an underwater umbilical cable in an ocean device. The device comprises a connecting device, a clamp, a steel cable hanging net and a tension monitoring sensor, wherein the connecting device, the upper end and the lower end of the steel cable hanging net, and the tension monitoring sensor are located on the same plumb line, the connecting device, the clamp and the steel cable hanging net are used for being connected with and fixing the umbilical cable, the tension monitoring sensor is arranged below the connecting device and connected to an instrument bin of a submersible device through a signal line and a watertight connector, a computer in the instrument bin is communicated with a water surface computer through an RS-422 communication interface, and voltage signals of the tension of the umbilical cable are transmitted to the computer in the instrument bin by the tension monitoring sensor and then are transmitted to the water surface computer through the umbilical cable. By means of the method and device, the tension of the underwater umbilical cable can be monitored and is prevented from exceeding a threshold value, necessary information can be provided for the operation of operation personnel in time so that the fatigue cracks of the umbilical cable and the operation accidents of the submersible device can be avoided, and the operation safety of a body of the submersible device can be ensured.
Description
Technical field
What the present invention relates to is a kind of control gear and method of seafari device technique field, specifically a kind of device and method for umbilical cables tension force monitoring under water.
Background technology
Ocean is richly stored with mineral products, biology and space resources, and underwater vehicle, as a kind of new and high technology means, is explored in the process of ocean the mankind and played very important effect.And as one of the key components of submersible system, umbilical cables provides hydraulic power supply, electric supply and signal of communication etc. for underwater vehicle.Umbilical cables be subject to conduct oneself with dignity, wave, stream impact under can be stable smoothly work particularly important to the safety work of submersible system.But underwater vehicle body can not in water and lash ship or repeater synchronization heave, and when there is phase differential, underwater vehicle umbilical cables will bear enormous impact power.Impulsive force not only may be greater than the operating load of umbilical cables, even far may exceed the Fracture Force of umbilical cables, cause underwater vehicle under water operation or hang recovery time lose.For this reason, in submersible system configuration, needing to be thought of as umbilical cables increases tension monitoring equipment, monitors the cable internal tension of umbilical cables, thus provides reference for the payout operations scheme of reality, ensures the safe operation of underwater vehicle and cable system.
Through finding the retrieval of prior art, open (bulletin) the day 2012.04.04 of Chinese patent literature CN102401766A, disclose a kind of umbilical cable test joint and installation method thereof, it comprises an end young large back taper cover shape suitable for reading push pedal, some locking screw holes are equipped with at the edge of push pedal outer, the conical sleeve of a sheathed right cone and a left cone two halves tapered sleeve composition in the bellmouth of push pedal, an annular pressing plate is provided with at conical sleeve top, the edge of pressing plate end face is provided with some through holes corresponding with locking screw holes, and be arranged at intervals with some fastening screws simultaneously, the disc flange for concave bottom bottom one is provided with at the top of pressing plate, the center of flange is provided with some connecting through holes, the edge of end face of flange is provided with the through hole corresponding with the screw on pressing plate, connect on one at the end face of flange, under be respectively counter flange cylindrically in the middle of annular, the orchid dish at counter flange top is provided with some through holes of connecting corresponding to experimental facilities, the bottom orchid dish of counter flange is provided with the through hole that connect corresponding to the through hole of flange.It can be widely used in the test process of umbilical cable for underwater production system.But this technology only provides a kind of exterior pin to sample cable dress layer and cable core is fixed simultaneously, make umbilical cables can bear umbilical cable test joint and the installation method thereof of tension force and torsion, do not relate to tension monitoring equipment, do not form complete umbilical cables tension force supervising device, do not consider the practical application in Underwater Engineering simultaneously.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of device and method for umbilical cables tension force monitoring is under water proposed, automatic alarm can be realized, for operating personnel's proper operation of underwater vehicle submits necessary information, to take safety measures in time, avoid the fatigue break of umbilical cables and the work accident of underwater vehicle occur.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of device for umbilical cables tension force monitoring under water, comprise: for connecting and the coupling arrangement of fixing umbilical cables, clip, wirerope cat net and tension monitoring sensor, wherein: the upper and lower end of coupling arrangement, wirerope cat net and tension monitoring sensor are positioned on same pedal line, wirerope cat net upper end is fixed in umbilical cables by clip, lower end is fixed in underwater vehicle structure, tension monitoring sensor setting below coupling arrangement, and is connected to the instrument room of underwater vehicle through signal wire by watertight connector.
Computing machine in described instrument room carries out communication by RS ?422 communication interface and water surface computing machine, by tension monitoring sensor passes to the voltage signal of the umbilical cables tension force of computing machine in instrument room, pass to water surface computing machine by umbilical cables again, realize the monitoring of lash ship operating personnel to umbilical cables tension force.
Described tension monitoring sensor comprises: the Hollow Cylindrical Shaft of composition sensor external cavity and withstand voltage end cap and the resistance-strain induction installation be arranged in external cavity, watertight connector and strain amplification system, wherein: resistance-strain induction installation, strain amplification system and watertight connector connect successively, and be connected to instrument room on underwater vehicle through signal wire, resistance-strain induction installation exports the low voltage voltage signal of reflected resistance strain size, after the amplification of strain amplification system also analog to digital conversion, on output digit signals to underwater vehicle, instrument room carries out threshold decision to realize automatic alarm.
The present invention relates to the implementation method of said apparatus, comprise the following steps:
The first step, length requirement according to umbilical cables and the wiring of underwater vehicle body, by the coupling arrangement of the umbilical cables of corresponding length through underwater vehicle top;
Second step, wirerope cat net upper end clip is fixed in the umbilical cables below the coupling arrangement of underwater vehicle top;
3rd step, below the coupling arrangement of underwater vehicle top installation tension monitoring sensor;
4th step, wirerope cat net lower end earrings is fixed on tension monitoring sensing device;
The voltage signal that 5th step, tension monitoring sensor collect is sent to the computing machine in underwater vehicle instrument room by signal wire, send to water surface computing machine after treatment by the inside cable of umbilical cables;
6th step, the computing machine in underwater vehicle instrument room and water surface computing machine are carried out communication, monitored by water surface computing machine, when monitor value is greater than the umbilical cables tension force threshold values of setting, this umbilical cables tension force supervising device can carry out automatic alarm.
Technique effect
Compared with prior art, advantage of the present invention comprises:
1, this apparatus structure is simple, and it is convenient to assemble, and has higher sensitivity and reliability, considers the particular surroundings of submersible service simultaneously, and tension monitoring sensor have employed seal approach, is suitable for depth of water scope wide.
2, this device can submit necessary information directly to operating personnel's proper operation of underwater vehicle, to take safety measures in time, avoids the fatigue break of umbilical cables and the work accident of underwater vehicle occur.
3, this method can be used for all kinds of cable tension force monitoring hanging system, such as underwater robot, underwater trencher or other underwater operation equipment, and versatility and function expansibility better, can meet different actual job demands.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the scheme of installation of the present invention on underwater vehicle;
Fig. 3 is the structural representation of tension monitoring sensor of the present invention;
In figure: 1 coupling arrangement, 2 clips, 3 wirerope cat nets, 4 tension monitoring sensors, 5 encapsulants, 6 watertight connectors, 7 withstand voltage end caps, 8 strain amplification system, 9 resistance-strain induction installations, 10 Hollow Cylindrical Shaft, 11 underwater vehicles, 12 umbilical cables, 13 instrument rooms.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As figure 1 ?shown in 2, the present embodiment comprises: coupling arrangement 1, clip 2, wirerope cat net 3 and tension monitoring sensor 4, wherein: coupling arrangement 1, wirerope cat net 3 upper, lower end and tension monitoring sensor 4 are positioned on same pedal line, coupling arrangement 1, clip 2, wirerope cat net 3 is for connecting and fixing umbilical cables 12, wirerope cat net 3 upper end clip is fixed in umbilical cables 12, lower end is fixed on underwater vehicle 11, tension monitoring sensor 4 is arranged at below coupling arrangement 1, and be connected to the instrument room 13 of underwater vehicle 11 through signal wire by watertight connector 6, computing machine in instrument room 13 carries out communication by RS ?422 communication interface and water surface computing machine, tension monitoring sensor 4 is passed to the voltage signal of the umbilical cables tension force of computing machine in instrument room 13, water surface computing machine is passed to again by umbilical cables 12, realize the monitoring of lash ship operating personnel to umbilical cables tension force.
When umbilical cables 12 pull-up, wirerope cat net 3 diameter zooms in, and hangs on to umbilical cables 12 oversheath, thus is discharged on wirerope cat net 3 by umbilical cables 12 pulling force, and the umbilical cables 12 after wirerope cat net 3 is not stressed.
As shown in Figure 3, described tension monitoring sensor 4 comprises: the Hollow Cylindrical Shaft 10 of composition sensor external cavity and withstand voltage end cap 7 and the resistance-strain induction installation 9 be arranged in external cavity, watertight connector 6 and strain amplification system 8, wherein: resistance-strain induction installation 9, strain amplification system 8 and watertight connector 6 connect successively, and be connected to instrument room on underwater vehicle through signal wire, resistance-strain induction installation 9 exports the low voltage voltage signal of reflected resistance strain size, after the amplification of strain amplification system 8 also analog to digital conversion, on output digit signals to underwater vehicle, instrument room carries out threshold decision to realize automatic alarm.
Described low voltage voltage signal is relevant with the resistance-strain structure in the quantitative relation of umbilical cables Tensity size and the resistance-strain induction installation 9 of employing.
Described Hollow Cylindrical Shaft 10 and withstand voltage end cap 7 are bolted, and junction is provided with encapsulant 5.
This device is realized by following steps:
The first step, according to umbilical cables 12 length requirement with the wiring of underwater vehicle 11 body, by the coupling arrangement 1 of the umbilical cables 12 of corresponding length through underwater vehicle 11 top;
Second step, wirerope cat net 3 upper end clip 2 is fixed on underwater vehicle 11 top coupling arrangement 1 below umbilical cables 12 on;
3rd step, below underwater vehicle 11 top coupling arrangement 1 installation tension monitoring sensor 4;
4th step, wirerope cat net 3 lower end earrings is fixed on tension monitoring sensing device 4;
The voltage signal that 5th step, tension monitoring sensor 4 collect is sent to the computing machine in underwater vehicle instrument room 13 by signal wire, send to water surface computing machine after treatment by the inside cable of umbilical cord 12 cable;
6th step, the computing machine in underwater vehicle instrument room 13 and water surface computing machine are carried out communication, monitored by water surface computing machine, when monitor value is greater than the umbilical cables tension force threshold values of setting, this umbilical cables tension force supervising device can carry out automatic alarm, for operating personnel's proper operation of underwater vehicle 11 submits necessary information, to take safety measures in time, avoid the fatigue break of umbilical cables 12 and the work accident of underwater vehicle 11 occur.
Compared with prior art, this device can be used for all kinds of monitoring hanging the umbilical cables tension force of system, such as underwater robot, underwater trencher or other underwater operation equipment, by monitoring the cable internal tension of umbilical cables under different work environment, for the folding and unfolding cable scheme of lash ship winch in actual job provides reference, make umbilical cables internal tension unlikely excessive and exceed threshold values, ensure the safe operation of underwater vehicle and cable system, to meet different actual job demands.
Claims (5)
1. the device for umbilical cables tension force monitoring under water, it is characterized in that, comprise: for connecting and the coupling arrangement of fixing umbilical cables, clip, wirerope cat net and tension monitoring sensor, wherein: the upper and lower end of coupling arrangement, wirerope cat net and tension monitoring sensor are positioned on same pedal line, wirerope cat net upper end is fixed in umbilical cables by clip, lower end is fixed in underwater vehicle structure, tension monitoring sensor setting below coupling arrangement, and is connected to the instrument room of underwater vehicle through signal wire by watertight connector; When umbilical cables pull-up, wirerope cat net diameter zooms in and holds umbilical cables oversheath, thus is discharged on wirerope cat net by umbilical cables pulling force, and the umbilical cord after wirerope cat net is not stressed.
2. the device for umbilical cables tension force monitoring under water according to claim 1, it is characterized in that, computing machine in described instrument room carries out communication by RS ?422 communication interface and water surface computing machine, by tension monitoring sensor passes to the voltage signal of the umbilical cables tension force of computing machine in instrument room, pass to water surface computing machine by umbilical cables again, realize the monitoring of lash ship operating personnel to umbilical cables tension force.
3. the device for umbilical cables tension force monitoring under water according to claim 1, it is characterized in that, described tension monitoring sensor comprises: the Hollow Cylindrical Shaft of composition sensor external cavity and withstand voltage end cap and the resistance-strain induction installation be arranged in external cavity, watertight connector and strain amplification system, wherein: resistance-strain induction installation, strain amplification system and watertight connector connect successively, and be connected to instrument room on underwater vehicle through signal wire, resistance-strain induction installation exports the low voltage voltage signal of reflected resistance strain size, after the amplification of strain amplification system also analog to digital conversion, on output digit signals to underwater vehicle, instrument room carries out threshold decision to realize automatic alarm.
4. the device for umbilical cables tension force monitoring under water according to claim 1, it is characterized in that, described Hollow Cylindrical Shaft and withstand voltage end cap are bolted, and junction is provided with encapsulant.
5. a method for supervising for the device for umbilical cables tension force monitoring under water according to above-mentioned arbitrary claim, is characterized in that, comprise the following steps:
The first step, length requirement according to umbilical cables and the wiring of underwater vehicle body, by the coupling arrangement of the umbilical cables of corresponding length through underwater vehicle top;
Second step, wirerope cat net upper end clip is fixed in the umbilical cables below the coupling arrangement of underwater vehicle top;
3rd step, below the coupling arrangement of underwater vehicle top installation tension monitoring sensor;
4th step, wirerope cat net lower end earrings is fixed on tension monitoring sensing device;
The voltage signal that 5th step, tension monitoring sensor collect is sent to the computing machine in underwater vehicle instrument room by signal wire, send to water surface computing machine after treatment by the inside cable of umbilical cables;
6th step, the computing machine in underwater vehicle instrument room and water surface computing machine are carried out communication, monitored by water surface computing machine, when monitor value is greater than the umbilical cables tension force threshold values of setting, this umbilical cables tension force supervising device can carry out automatic alarm.
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| CN201410559031.0A CN104296915B (en) | 2014-10-20 | 2014-10-20 | For the device and method of umbilical cables tension force monitoring under water |
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| CN201410559031.0A CN104296915B (en) | 2014-10-20 | 2014-10-20 | For the device and method of umbilical cables tension force monitoring under water |
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| CN104296915A true CN104296915A (en) | 2015-01-21 |
| CN104296915B CN104296915B (en) | 2016-02-17 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258826A (en) * | 2015-11-17 | 2016-01-20 | 湖南科技大学 | Underwater tensile force measurement device |
| CN105947869A (en) * | 2016-07-01 | 2016-09-21 | 中国船舶重工集团公司七五○试验场 | Fast hook device for ROV suspension |
| CN106299906A (en) * | 2016-09-18 | 2017-01-04 | 北京机械设备研究所 | Possess transmission channel to safeguard and the umbilical cable protection socket of simulation training function |
| CN107340090A (en) * | 2017-08-02 | 2017-11-10 | 中国计量大学 | Mud retaining cloth condition monitoring system and monitoring method |
| CN108120540A (en) * | 2017-12-18 | 2018-06-05 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Mooring anchor chain tension monitoring device |
| CN109269721A (en) * | 2018-09-27 | 2019-01-25 | 广船国际有限公司 | Ship freely equals floating method in a kind of guarantee measurement experiment |
| CN109572964A (en) * | 2018-11-20 | 2019-04-05 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of underwater robot automatic control system applied to non-powered positioning ship |
| CN109622820A (en) * | 2018-12-27 | 2019-04-16 | 中国船舶重工集团公司第七0研究所 | A kind of underwater compound towrope emergency cutting mechanism |
| CN109799023A (en) * | 2019-03-21 | 2019-05-24 | 杭州电子科技大学 | A kind of compensation tension sensing device of deep-sea detecting |
| CN113866346A (en) * | 2021-07-20 | 2021-12-31 | 海洋石油工程股份有限公司 | Monitoring devices is revealed to umbilical cable upper portion methyl alcohol |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653331A (en) * | 1986-06-20 | 1987-03-31 | The United States Of America As Represented By The Secretary Of The Navy | Test apparatus for uniform tensioning of long lengths of small cables in simulated environments |
| JP3048355B1 (en) * | 1999-01-11 | 2000-06-05 | 防衛庁技術研究本部長 | Cable tension measuring device |
| CN101545814A (en) * | 2008-12-30 | 2009-09-30 | 中国海洋大学 | Real-time automatic recording type underwater tension gauge |
| CN102214905A (en) * | 2010-04-09 | 2011-10-12 | 中国海洋石油总公司 | Device for monitoring laying stress of undersea cables of cable burying machine |
| US20120328372A1 (en) * | 2011-06-23 | 2012-12-27 | Ghaham Hawkes | Dual mode fiber optic cable system for underwater remotely operated vehicle |
| CN102935966A (en) * | 2012-11-25 | 2013-02-20 | 中国船舶重工集团公司第七一〇研究所 | Winch for online test of automatic cable arranging tension |
-
2014
- 2014-10-20 CN CN201410559031.0A patent/CN104296915B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653331A (en) * | 1986-06-20 | 1987-03-31 | The United States Of America As Represented By The Secretary Of The Navy | Test apparatus for uniform tensioning of long lengths of small cables in simulated environments |
| JP3048355B1 (en) * | 1999-01-11 | 2000-06-05 | 防衛庁技術研究本部長 | Cable tension measuring device |
| CN101545814A (en) * | 2008-12-30 | 2009-09-30 | 中国海洋大学 | Real-time automatic recording type underwater tension gauge |
| CN102214905A (en) * | 2010-04-09 | 2011-10-12 | 中国海洋石油总公司 | Device for monitoring laying stress of undersea cables of cable burying machine |
| US20120328372A1 (en) * | 2011-06-23 | 2012-12-27 | Ghaham Hawkes | Dual mode fiber optic cable system for underwater remotely operated vehicle |
| CN102935966A (en) * | 2012-11-25 | 2013-02-20 | 中国船舶重工集团公司第七一〇研究所 | Winch for online test of automatic cable arranging tension |
Non-Patent Citations (3)
| Title |
|---|
| 张智勇等: "一种新型张力保护自动收放脐带缆绞车装置", 《海洋工程》 * |
| 张波等: "用于水下作业的锯绳张力检测系统", <<仪表技术与传感器>> * |
| 束理: "在线测试水下缆索及钢索张力的探讨", 《机械管理开发》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258826A (en) * | 2015-11-17 | 2016-01-20 | 湖南科技大学 | Underwater tensile force measurement device |
| CN105258826B (en) * | 2015-11-17 | 2016-12-07 | 湖南科技大学 | One tension measuring device under water |
| CN105947869A (en) * | 2016-07-01 | 2016-09-21 | 中国船舶重工集团公司七五○试验场 | Fast hook device for ROV suspension |
| CN106299906B (en) * | 2016-09-18 | 2018-12-11 | 北京机械设备研究所 | The umbilical cable protection socket for having transmission channel maintenance and simulated training function |
| CN106299906A (en) * | 2016-09-18 | 2017-01-04 | 北京机械设备研究所 | Possess transmission channel to safeguard and the umbilical cable protection socket of simulation training function |
| CN107340090A (en) * | 2017-08-02 | 2017-11-10 | 中国计量大学 | Mud retaining cloth condition monitoring system and monitoring method |
| CN108120540A (en) * | 2017-12-18 | 2018-06-05 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Mooring anchor chain tension monitoring device |
| CN109269721A (en) * | 2018-09-27 | 2019-01-25 | 广船国际有限公司 | Ship freely equals floating method in a kind of guarantee measurement experiment |
| CN109269721B (en) * | 2018-09-27 | 2020-08-07 | 广船国际有限公司 | Method for ensuring free floating of ship in determination experiment |
| CN109572964A (en) * | 2018-11-20 | 2019-04-05 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of underwater robot automatic control system applied to non-powered positioning ship |
| CN109622820A (en) * | 2018-12-27 | 2019-04-16 | 中国船舶重工集团公司第七0研究所 | A kind of underwater compound towrope emergency cutting mechanism |
| CN109799023A (en) * | 2019-03-21 | 2019-05-24 | 杭州电子科技大学 | A kind of compensation tension sensing device of deep-sea detecting |
| CN113866346A (en) * | 2021-07-20 | 2021-12-31 | 海洋石油工程股份有限公司 | Monitoring devices is revealed to umbilical cable upper portion methyl alcohol |
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