CN101466917B - System and method for controlling pipe pressurization of cable installation - Google Patents
System and method for controlling pipe pressurization of cable installation Download PDFInfo
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- CN101466917B CN101466917B CN200680054205.1A CN200680054205A CN101466917B CN 101466917 B CN101466917 B CN 101466917B CN 200680054205 A CN200680054205 A CN 200680054205A CN 101466917 B CN101466917 B CN 101466917B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
- H02G1/086—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling using fluid as pulling means, e.g. liquid, pressurised gas or suction means
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- Light Guides In General And Applications Therefor (AREA)
Abstract
A system (100) includes a duct (115), a pressurized fluid source (110), and a valve (140). The duct (115) receives one or more cables (125) and the pressurized fluid source (110) couples to a first end of the duct (115) and produces fluid pressure within the duct (115). The valve (140) couples to a second end of the duct (115) and is closed for a time to build pressure within the duct, and then opened to permit the fluid under pressure within the duct to escape rapidly from the duct and propel the one or more cables (125) through the duct.
Description
Technical field
The present invention relates in general to a kind of general cable (utility cable) mounting technique, more specifically, the present invention relates to use pressurized with fluid and settle general cable in pipeline.
Background technology
In general cable installing area, prior art has been used through the viscous flow of the fluid of for example air of piping and general cable has been installed in pipeline.This cable " blows " technology and has been applied to along ground general cable being installed or being used for suspension wires when building tedge than short distance.
Yet, be difficult to blow technology at the existing cable of distance application of crossing over greater than several kms.Mainly due to the viscous flow feature, fluid is obstructed greatly by mobile the becoming of extremely long and narrow pipeline, thereby causes standing high back pressure at place, the initial end of pipeline.This problem can limit existing cable and blow the applicable distance of technology, and can impose restriction for the conduit types that can be used and the cables types that can configure in given pipeline.Additionally, existing cable blows technical requirements and applies elevated pressures to the pipe end that feeds cable by it.These high pressure can cause pipeline " explosion (blow-outs) ", and its mesohigh causes that duct wall breaks or seals/clamp inefficacy, wherein break or lose efficacy at pipeline and the sealing that applies to pipeline between the unit of pressure fluid.
Summary of the invention
According to an aspect consistent with the principle of the invention, a kind of method for advancing cable by pipeline can comprise: the closing control pressure fluid is from the valve that flows of pipeline first end, the second end place at pipeline, apply pressure fluid to the inner space that is held by pipeline, and open the pressure fluid outflow of valve to be allowed for advancing cable to pass through at least a portion length pipeline.
According to consistent with the principle of the invention on the other hand, a kind of usefulness is so that settle the equipment of cable to comprise at pipe interior: be configured to be connected to the end of pipeline and the valve that the control pressure fluid outwards flows from pipe interior.This valve is designed to automatically open and close in response to the pressure sensor of pipe interior.Alternately, this valve can activated by timer or from the order of outer member.
According to the another aspect consistent with the principle of the invention, a kind of system for cable is installed at pipeline comprises: the valve that is connected to the first end of pipeline, and the source of pressurised fluid that is connected to the second end of pipeline, wherein this valve can activated to affect the pressure of pipe interior.
Description of drawings
The accompanying drawing that is merged in and consists of this manual part illustrates exemplary embodiment of the present invention, and explains the present invention with manual.In the drawings:
Figure 1A-1C illustrates the example system that is used for installing at pipeline general cable according to one aspect of the invention;
Fig. 2 and 3 illustrates the exemplary slip chart relevant with the operation of the different aspect of the system of Figure 1A-1C;
Fig. 4 illustrates the exemplary slip chart relevant with the flight time (time of flight) of the compression wave that is identified for advancing to the other end from an end of pipeline;
Fig. 5 is illustrated in one aspect of the present invention of end place's use vacuum generator of pipeline;
Fig. 6 illustrates the exemplary slip chart relevant with system's operation of describing in Fig. 5;
Fig. 7 illustrates the another aspect of the present invention of using for the automatic control system that opens and closes the valve that is connected to an end of pipeline; And
Fig. 8 is the flow chart that the exemplary cable installation process consistent with one aspect of the present invention is shown.
The specific embodiment
Detailed description below the present invention with reference to the accompanying drawings.Same reference numerals in different accompanying drawings can identify identical or similar element.And following detailed description does not limit the present invention.On the contrary, scope of the present invention is limited by claims and their equivalent form of value.
The system and method consistent with principle of the present invention comprises, cable inserted in the pipeline near-end and to pipeline apply for example compressed-air actuated pressure fluid, passes through duct length to carry cable.Particularly, the system and method consistent with principle of the present invention also comprise temporary close pipeline far-end with allow in pipeline pressure to raise and then opening conduits flow out to trigger pressure fluid, thereby advance cable to pass through pipeline.With blow the elevated pressures of using in the technology at existing cable and compare, use valve etc. can make it possible to use lower gross pressure in the whole length of pipeline in the even pressurization of pipe interior allowing at far-end.Low gross pressure can alleviate, the problem that for example " explosion " and seal for pipe joints/clampings lost efficacy, and these problems are more common when existing cable blows in the technology use elevated pressures.Alternately, the system and method consistent with principle of the present invention can pressurize by the pulsation that application is advanced via pipeline but not realize that along pipeline basic evenly the pressurization operates.Can carry out valve actuation with the time that pressurized impulse arrives the dress valve end of pipeline relevantly.
Figure 1A illustrates the use pressure fluid is installed one or more cables at pipeline the system 100 that is used for according to an aspect of the present invention.System 100 can comprise that pressurization feeds chamber 105 and feeds the compressor/pressurized reservoir 110 that end provides pressure fluid to the cable of pipeline 115.Compressor/pressurized reservoir 110 is source of pressurised fluid, and can comprise air pump, hair-dryer or from the compressible gas source of pressurized canister, such as air, carbon dioxide, drying nitrogen etc.In order to alleviate build-up of static charges, can use ionized gas.In some embodiments, pipeline 115 can have roughly several kms or even remarkable longer length.Clamp/seal 135 can form Fluid Sealing feeding between chamber 105 and the pipeline 115.Feeding chamber 105 can comprise and can help to feed feed roller 120 end from feeding cable that reel 130 is fed to pipeline 115 with cable 125.Feed roller 120 contacts cables and applies longitudinal force, (perhaps leaves pipeline, if necessary) to force cable to enter in the pipeline.Feed roller 120 normally motor drive and can comprise that motor control or transfer element feed speed with control.Feed roller 120 can also participate in monitoring or measuring the cumulative length that has been fed to ducted cable.This can be used to estimate the bending that may run between installation progress and definite installation period or the position of obstacle.Can use and feed tractor, clamping device or other device and apply active force to substitute feed roller to cable.
Valve 140 can be coupled to pipeline 115 " far-end ", that is, and and the end relative with feeding end of pipeline.About this explanation, with the cable of for example optical cable insert in the pipeline will along from " feeding end " to " far-end " or the direction from " inlet end " to " outlet end " carry out.Valve 140 can be closed, and can apply pressure fluid (pressure fluid also can be applied to conduit entrance consistently, and this allows valve 140 to act on and controls at any given time pipeline is pressurized or is depressurized) via compressor/pressurized reservoir 110.After valve-off 140, the pressure that the fluid of pipeline 115 inside can reach evenly, raise.When valve closing, compressible gas can be compressed in pipe interior or the inner space that is held by pipeline.After pressure raise, valve 140 can be opened, so that the pressure fluid that contains in pipeline 115 length flows out.This outflow can be the most remarkable at the far-end of pipeline 115, but suddenly step-down can cause in the whole length of pipeline 115 remarkable pressure driven flow 145, it can advance cable 125 by at least a portion (that is, by being called as the certain distance of fetch) of pipeline 115.Feed the high pressure phase ratio of the current requirement in end place when blowing technology with the existing cable of use at the cable of pipeline 115, evenly pressurization can make it possible to use lower gross pressure in the whole length of pipeline 115.Evenly pressurization can alleviate existing cable and blows the pipeline " explosion " that occurs in the technology or the problem of seal failure.
As shown in Figure 1B, be closed (shown in 145) afterwards at valve 140, pressure can be in the inner space of pipeline along the whole length of pipeline 115 and raise (shown in 150).Main aspect fluid compression and might degree much lowerly aspect the small expansion of the wall of pipeline 115, the pressurization of pipeline 115 is so that store potential energy in the whole length of pipeline 115.
As Fig. 1 C further shown in, after applying pressure fluid, valve 140 can be opened (seeing 155).Then pressure can be released 160 and mobile to advance cable 125 by at least a portion of pipeline 115 along the whole length promotion of pipeline 115.By having the potential energy of storage when pressurizeing (gas compression) along the whole length of pipeline 115, can be by near far-end, bringing out remarkable flowing to the pipe interior decompression and at the far-end near pipeline suddenly.With pipeline to feed the pressure fluid that the end place applies opposite owing to having run through the whole length of pipeline so that this flow not interrupted.This effect has improved substantially and has blowed the effectiveness of mounting technique in long distance is installed.
In some embodiments, for most of length or the whole length of towing cable 125 by pipeline 115, need to use repeatedly the unexpected decompression cycles shown in Figure 1B and the 1C.Pressure fluid is desirable by the series of pulses that flows or the moment increase of pipeline, and can be than more effective from the steady-state flow that feeds the end driving separately.Valve 140 can be designed to: when detecting preset pressure in pipeline 115, perhaps automatically open when detecting enough pressure reduction between the inside of pipeline 115 and atmosphere or environment stress.Valve 140 can be designed to: again close when the Pressure Drop of pipeline 115 inside is following to setting value.Valve 140 also can be designed to take the time as the basis, automatically between the opening and closing state, circulate in response to stress level or its combination of pipeline 115 inside.For example, automatically close if valve 140 is set as automatically opening under the first pressure and be under the second pressure that is lower than the first pressure, then can realize the automatic cycle action.Under this state, will cause do action at pipeline exit even apply steady state pressure in conduit entrance place, but the speed of forcing fluid to enter in the conduit entrance can be used to the brew cycle time.In case this automatic operation mode has been so that valve has been coupled to pipeline, just can be in the situation that use valve without further manual intervention, thus be convenient to be installed by still less Field Force.
Fig. 2 describes the relative timing according to the various aspects of the operation of the installation system of the exemplary embodiment of this instruction and method.In Fig. 2, ordinate represents the time.From the top to the bottom, the first chart represents in the import of pipeline or feeds the end place and applies pressure fluid, the second chart represents opening or closed condition at the valve 140 of pipeline far-end, the 3rd chart represents internal pipe pressure, the 4th chart show pressure fluid by the pipeline far-end speed and the 5th chart drawing in phase feed roller is carried out optional control mutually with other event.As shown in Figure 2, a series of " pulses " 205 of pressure fluid cable that can be applied in a looping fashion pipeline 115 feeds end.At the rising edge place of each pulse 205, valve 140 can be closed 210 to allow the pressure on the pipeline 115 whole length to be elevated to even level 215.After the pressure by pipeline 115 length had reached even level, valve 140 220 (preferably suddenly being opened) that can be opened were flowed out to cause fluid to pass through pipeline 115, thereby advance cable 125 by the part of pipeline 115.This technology can be especially be used at the cable of pipeline 115 viscous (for example, because along the obstacle of pipeline) or for increasing " fetch " at the friction point place in the pipeline 115.Being increased in suddenly that pressure raises and occuring by opening in valve 140 each circulation after discharging subsequently of outlet stream 230.Note, as utilize dash line 206 to describe, can select a kind of alternative, wherein pressure fluid be applied to consistently import simultaneously distal valve 140 open 220 and close 210 with being recycled.Pipeline pressure and outlet stream will still roughly show pressurization and release as shown.The 5th chart among Fig. 2 shows the optional control via the action of feed roller feed roller motor.With pressurization and valve open side by side, feed roller can be controlled to move during the All Time when pressure is just gathered or part-time, and/or moves during the All Time when pressure discharges or part-time.Fig. 2 is illustrated in whole pressure dwell feed roller along the operation of forward direction 240 (forcing cable to enter in the pipeline), can alternately be controlled to apply forward thrust being opened with valve 140 and exporting the about identical time be maximized of flowing but imagine roller.Alternatively, at this time durations, forward feed rate can be increased 242.In some embodiments, during the part of circulation, also can be used for overcoming obstacles thing along opposite a little direction operation feed roller (seeing 244), thereby effectively cause optical fiber automatically " to fall back and again trial ".In order to promote to carry out sensing to successfully feeding better, feed roller can in cycle period, become neutral gear, in order in the situation that do not provide any longitudinal force sense cable to feed progress especially during the earth pressure release part.Then when detecting successfully or during unsuccessful flow driving cable progress, can along forward or rightabout activate feed roller.
In another embodiment, as shown in Figure 3, for valve 140 open each time 320 also can follow pressure fluid burst 305.Each is burst and 305 can strengthen flow rate and cable 125 and carry by the viscosity of pipeline 115.Stress level 315 represents the first pressurization level, can be expressed as pressure or flow rate.305 representatives of bursting are pressurizeed or the flow rate level in second of conduit entrance place, and this second level is greater than the first level.Even during valve open, also can keep steady-state flow or stress level (302) in conduit entrance place.Alternately, in valve open, mobile or pressure can be ended (303) momently.
Can or feed flow control component (for example valve or adjuster are not shown) between the chamber 105 or that pressurization feeds between chamber 105 and the pipeline 115 between compressor/pressurized reservoir 110 and pressurization by modulated pressure realizes bursting 305.At circulation pressurization and the decompression of pipeline 115, control element can activated specific times.Bursting in addition 305 is used for just d/d the increasing simultaneously along the total flow of pipeline 115 of pressure of storing at pipeline.This bursting can be timed to roughly beginning before opening valve 140, thereby propagated through most duct length by this compression wave that causes of bursting before valve open.The sequential of bursting with respect to valve open can be conditioned as required, and particularly, and can and calculate or measure use to burst and burst in the propagation delay of exit between occurring in conduit entrance place is changed pro rata.
When advancing by optical fiber when bursting, it also can bounce cable or cause ripple along cable, is interrupted or any part of the cable of other obstruction shakes and gets loose thereby will make along " grasping " or " suspensions " of standing to rub, stick, relate to other cable, pipeline.Shown in 317, total pipeline pressure can burst 305 and raise a little in response to application, but this effect is dispensable for the successful operation that employing is burst.If in good time, bursting to have remarkable result partly, even it is not along the whole length rising equilibrium pressure of pipeline.The effect of bursting can cause the peak value outlet mobile 330 of increase.
Fig. 4 illustrates one aspect of the present invention, and wherein opening of valve can feed the far-end synchronization that end arrives pipeline 115 with the cable of ripple from pipeline 115 that pressurize.The user can calculating pressure 410 propagation time or flight time (t
FLIGHT) 405, this pressure 410 be the cable at pipeline 115 feed that the end place is applied in the far-end 415 that marches to pipeline 115 and received at this place.Then valve 140 can be opened at Best Times 420 based on the flight time that calculates, with the Air Flow of far-end of maximization pipeline 115.A kind of technology of calculating the flight time is, the length of measuring channel 115 (for example, unit is foot) and will record length divided by 1100 feet per seconds (or any spread speed that gas be suitable for of longitudinal wave by pipe interior, and take in pressure, density, temperature, gradient and the other factors that affects spread speed).The cable that a kind of technology for the empirical measurement flight time can be included in pipeline 115 feeds the end place and produces large noise (perhaps sound wave or compressional-dilatational wave), utilization is measured the flight time at the sound receiver of the far-end of pipeline 115, and the timing device of example such as stopwatch is determined the flight time.(certainly, can measure it along either direction, if but gas passes through the net flow of pipeline affects spread speed, and then may use correction factor).Cataclysm and the measurement time before the opposed end place of pipeline observes the relevant pressure change can be carried out a kind of very similarly technology by exerting pressure to an end of pipeline.
After determining the flight time, the user can feed at the cable to pipeline 115 end and open valve 140 at Best Times after applying pressure fluid, the pressure when thereby cable 125 is subjected to the far-end that it reaches pipeline 115, thereby cable 125 is pushed into by pipeline 115 ultimate ranges and is more effectively advanced past the distal part of pipeline.Sensing flight time and all can automatically carry out by controller in response to determined flight time by-pass valve control 140.
Consistent with another aspect of the present invention, valve 140 can partly be opened, perhaps pressure regulator can be coupled to pipeline 115 with place of valve 140, thereby keeps desired continuous flow rate when above when the whole length along the net pressure of the whole length of pipeline 115 along pipeline 115 is elevated to atmospheric pressure.Consistent with this aspect, keep minimum pressure or the flow rate of pipe interior, the flow-drag characteristic that can realize ideal always.
Fig. 5 illustrates another aspect of the present invention, wherein with at the near-end of pipeline 115 (namely, the cable of pipeline 115 feeds end) locate to apply pressure fluid and combine, can locate to apply vacuum at the far-end (that is, the cable apart from pipeline 115 of pipeline 115 feeds end end farthest) of pipeline 115.According to this aspect, for example the vacuum generating device of vacuum generator 505 can be coupled to pipeline 115.By opening valve 140 with suitable number of times, vacuum can be applied to the far-end of pipeline 115.The vacuum generating device can apply vacuum to pipe outlet inherently by opening valve 140, perhaps can connect by independent valve (not shown), thereby pipeline can optionally be open into atmospheric pressure or stand vacuum.
Fig. 6 illustrates a kind of slip chart of illustrative embodiments, wherein can apply vacuum (shown in 605) when valve 140 is opened (shown in 620).Combine with applying pressure fluid 615, apply vacuum and can help to advance cable 125 by pipeline 115 ultimate ranges.Timing burst of pressurization (617) in addition also can be used to as described above increase and flow.Use well known to a person skilled in the art technology, valve 140 can be designed in response to pressure or pressure reduction, comprise pipeline 115 internal pressure, be applied to the vacuum of the far-end of pipeline 115, the perhaps sensing of any combination of environment or atmospheric pressure and automatically regulate flow rate.The vacuum that applies can be integrated in the function of valve 140 or can utilize the independent valve (not shown) that vacuum generator 505 is connected to the outlet of valve 140 to realize.Also can near valve 140 places or its, comprise probe, when arrive the far-end of pipeline to survey the cable that just is being mounted.This detection can be used for to the signal that feeds end transmission installation.Also can indicate installation by the build-out of feed roller by monitoring.Automation formula system can stop further to feed/blowing process when detecting installation.
Fig. 7 describes to comprise the installation system 700 of the control system that is applicable to support various embodiments of the present invention.Fig. 7 also shows the automatic measurement system that can be used for be determined alternatively in the above flight time of describing about Fig. 4.
Controller 722 as shown in Figure 7 can be coordinated the action of other element, with the operation that realizes for example describing in Fig. 2,3 and 6.As one of ordinary skill will recognize, controller 722 may be also nonessential for all useful embodiment, because some elements can independently play a role, can directly interact or can have certain provide for oneself control functional.Following any combination can be controlled or coordinate to controller 722: the actuating of valve 140 (via connecting 740), be applied to the pressure of pipeline or flow rate (via connecting 710), be applied to the active force (via the connection 720 that is used for control motor 725) of cable and at apply (via the vacuum generators 505 that connect 705 controls) of the outlet end place of pipeline vacuum by feed roller 120 by compressor/pressurized reservoir 110.
Connect 740 and can be used as control link, by this control link controller 722 or other outer member can by-pass valve control 140 opening and closing.Additionally or alternately, connect 740 and can be used as signal and send link, send link valve 140 to controller 722 or according to embodiment other its opening and closing of element indication to the valve outside by this signal.According to more described embodiment, valve 140 can (for example sensor 750 in response to interval timer or pressure or flow-sensint unit, be described below) and independently open and close, any one in them all can form one or directly be connected to valve with valve.Controller 722 can use valve actuation indication with other action in the control system 700 in turn, the pressure that for example sends from compressor/pressurized reservoir 110 or flow or apply active force by motor 725 and feed roller 120.In order to coordinate and control the action of whole system 700, controller 722 can be in response to any one or all clauses and subclauses in the following clauses and subclauses and is moved: the outflow flow rate of observing at pipeline exit, relative or the absolute pressure (as being detected by pressure sensor) of pipe interior, such as the time by the timer indication, the actuating indication of valve 140, cable is with respect to the motion detection of pipeline (by feed roller 120 or by independently feeding monitoring device (not shown) sensing), and the place, an end at pipeline that perhaps records exerts pressure and changes and observe the time interval of relevant pressure between changing at the opposed end place of pipeline.
Exerting pressure about the place, end at pipeline changes and observes the time interval of relevant pressure between changing at the opposed end place of pipeline, and various mechanism can be used to measure propagation delay or so-called " flight time " empirically.This measurement can be by automation, and so that measurement result can be used to controller 722 to coordinate the sequential of specific action, and burst 305 sequential of pressure for example occurs.
In order to implement a kind of possible flight time measurement, system 700 can comprise acoustic transmitter 736, acoustic receiver 730 and flight time measurement device 715.Acoustic transmitter 736 can feed at the cable of pipeline 115 end (inlet end) and locate to produce acoustic signal (sound wave), and described acoustic signal can be located to be received by acoustic receiver 730 at the far-end (outlet end) of pipeline 115.Via connecting 734, measuring element 715 can trigger acoustic signal makes it from acoustic transmitter 736 emissions, perhaps can inform measuring element when acoustic transmitter 736 independently produces acoustic signal.Via connecting 732, when acoustic receiver 730 detected the signal of and internal communication that pass through pipeline 115 736 transmissions from acoustic transmitter, measuring element 715 can receive notice.Measuring element 715 can be measured the acoustic signal that occurs and feed the used time quantum (that is, flight time) of far-end that end advances to pipeline 115 from the cable of pipeline 115.Measuring element 715 can convey to controller 722 with measurement result via connecting 717.
Replacement can mainly comprise the acoustic signal of audio frequency or ultrasonic frequency component, and measuring element 715 can be for locate to introduce unexpected pressure increase and the time lag of measurement before the other end of pipeline is located to detect the relevant pressure increase in an end of pipeline.About this operation, measuring element 715 can be coupled to pressure or flow rate sensor 750, to survey near the outlet end that compression wave is arrived pipeline 115.Pressure or flow rate sensor 750 representatives are used for surveying at the outlet end place or near the sensor of the internal pipe pressure it, and perhaps representative is used for surveying pressure fluid passes through the flow rate of pipeline at this some place sensor.Record pressure and can be absolute or with respect to the environment stress of pipeline external (perhaps external vacuum, if you are using).For example, can form the compression wave that will be detected by controller 722, this controller direct pressurized fluid source 110 is applied to pressure or the flow rate of conduit entrance with change.Additionally, another pressure or flow rate sensor 756 can be coupled to pipe interior near the inlet end place of pipeline 115 or its.Pressure or flow rate sensor 756 can be used for surveying the pressure variation that occurs at the inlet end place of pipeline 115 and can be used for carrying out flight time measurement.By the effect of monitoring compressor/pressurized reservoir 110 in conduit entrance place, pressure or flow rate sensor 756 also can be used to other control purpose.In the exit of pipeline 115 or near the pressure/flow rate sensor it 756 can be used for to survey flow out flow rate, flow out end or its effectiveness that flow rate can be used to determine pressurization/release cycle.
Although comprising along the direction from conduit entrance to outlet, the measurement of just having described propagates acoustic signal or compression wave, but one of skill in the art will recognize that, also can estimate the flight time by similar measurement or relative certain mode of carrying out in opposite direction, that is, by from exporting to the import transmitting signal.The present invention be not be intended to Restriction of the Measuring for strictly along with cable is installed to direction identical in the pipeline and carries out.And then the flight time measurement that obtains in either direction may affect the sequential of other action in the system 700, but also not necessarily is used directly as the time numerical sequence for the event of coordination.For example, by propagate flight time measurement that acoustical sound waves realizes can be with to be used for the flight time that abrupt pressure increases not identical, indirectly the latter is estimated allowing yet the former is can be on mathematics relevant with the latter.May need to use other correction factor or side-play amount to realize action required.For example, in some embodiments, compression wave just in time arrives last 20% place of duct length in the time of may being desirably in valve and being opened.Therefore, exert pressure ripple and the sequential opened between the valve will be not equal to the flight time that records in conduit entrance place, but will expressly proportionally be defined as recording roughly 80% of the flight time.Also can how soon to be opened with for example valve and be used the constant offset amount relevantly.Describe ground as combining with Fig. 2,3 and 6, the various aspects of the sequencing of event and relative timing can be conditioned in this system, and to realize desired operation under different situations, these all are in the spirit and scope of the present invention.
Should be noted that, input from acoustic transmitter 736 for example, acoustic receiver 730, pressure/flow rate sensor 750,756 various sensors can be coupled by measuring element 715 (illustrating for clear), perhaps can be alternately or additionally directly be connected to controller 722.For example, controller 722 can adopt from the pressure of pressure/flow rate sensor or flow rate indication, to be used for except measuring the purpose the flight time.And then controller 722 can integrated or otherwise be realized the function of measuring element 715.
Although all clearly be shown in Fig. 7 for each possibility of settling pressure and flow-sensint unit, should be appreciated that, can use relatively or absolute pressure transducer any position in system 700, to determine at the pressure at Chosen Point place and the pressure reduction between Chosen Point, comprise the environment stress that is usually located at outside pipeline 115 or the system 700 and centers on it, for example earth atmosphere is pressed.The proper arrangement that those of ordinary skills can easily determine various types of sensors according to action required and the principle of instruction here is successfully to implement this instruction.
Measuring element 715 and related elements thereof are optional, and controller 722 can in response to or do not control pressurization and the decompression of pipeline 115 in response to flight time measurement.If the control response of system 700 is in flight time measurement, then controller 722 can cause or control apply for example pressure fluid of Compressed Gas from compressor/pressurized reservoir 110 via connecting 710, and then causes that via control line 740 valve 140 opens after based on the time interval that records the flight time.System 700 can be based on continuous or period measurement and control is by the installation of the cable of pipeline 115 automatically adaptively, and described measurement can be used in regulates action sequence and other operating parameter.
Controller 722 and measuring element 715 if you are using, can be positioned at any position.Can example any as in the various connections of describing among the signal of telecommunication by electric wire, realization Fig. 7 such as optical signal, radio signal by optical fiber.Can be by realizing described connection by cable or optical cable pipeline 115 installations or that in other situation, be parallel to the pipeline path installation.System element also can connect via the electric wire by public or private telephone network or radio telephone, " duties words electric wire (order wire) " connection or road equipment or for example public utility of telephone wire, power line and cable television appliances and mutually intercommunication.
Fig. 8 be illustrate for general cable is installed at pipeline with of the present invention aspect the flow chart of consistent example process.Cable normally circular and have uniform cross-section in its whole length.Yet for the ease of blowing installation, cable can alternately provide the cable section of thickening at place, an end or can temporarily be equipped with at far-end buoy, piston or the connector of certain form.Because the expection flow rate towards the pipeline far-end increases, these measures may be particularly useful in situation of the present invention.This example process can start from the cable that cable 125 is inserted pipeline 115 and feed (action 805) in the end.Then valve 140 can be closed (action 810).Valve 140 can the artificially or is closed via the control of device 715.Pressure fluid can feed via the cable that compressor/pressurized reservoir 110 is applied to pipeline 115 end (action 815).Can apply pressure fluid via Artificial Control or via the control of device 715.Alternatively, vacuum can temporarily be applied to the far-end (action 820) of pipeline 115.Can be just in time before opening valve 140 period after opening valve 140 apply vacuum.Alternatively, the pressure fluid liquid level that applies can be increased (action 825).Can be just in time before opening valve 140 period after opening valve 140 increase the pressure fluid liquid level that applies.
Valve 140 can be opened (action 830).Valve 140 can the artificially or is opened via the control of device 715.The far-end that can cause fluid to pass through pipeline 115 of opening of valve 140 flows out, and therefore, advances cable 125 by pipeline 115 certain distances.Then, alternatively, can end to feed end to the cable of pipeline 115 and apply pressure fluid (action 835).As shown in Figure 2, apply pressure fluid and can be ended to produce pressure " pulse ".Action 810-835 can be continuously repeated, and passes through whole or most pipeline 115 with towing cable 125.
The above stated specification of the embodiment of the invention provides signal and has described, but not be intended to limit or limit the invention to disclosed precise forms.According to above instruction, modifications and variations are possible, perhaps can be obtained from the practice of the present invention.Although described a series of action about Fig. 8, in other embodiment consistent with the present invention, running order can change.And non-complementary action can be carried out concurrently.For for purpose of brevity, the action that some are possible does not for example apply the execution of active force or flight time measurement by feed roller, and is shown in Figure 8 but fully describe elsewhere.
Any element, action or the instruction of using in above stated specification all should not be understood as that to be crucial or to be essential for the present invention, unless clearly be described as like this.And as used herein, article " a " is intended to comprise one or more clauses and subclauses.When only meaning clauses and subclauses, use term " " or similar language.And then, phrase " based on " be intended to expression " at least in part based on ", unless clearly be expressed as other situation.Scope of the present invention is limited by claims and the equivalent form of value thereof.
Claims (32)
1. one kind is used for advancing cable by the method for pipeline, comprising:
Close for the valve that flow of control pressure fluid from the first end of pipeline, wherein, described valve is controlled described pressure fluid and is outwards flowed from the inner space of pipeline;
Cable is inserted in the second end of described pipeline, and at the second end place of described pipeline, apply described pressure fluid to the described inner space that is held by described pipeline; And
The pressure of the described pressure fluid that calculating is applied at the second end place of described pipeline advances to the described first end of described pipeline and in the received propagation delay of described first end, and based on described propagation delay and definite time, open described valve, allow to advance the pressure fluid of described cable by at least a portion length of described pipeline from the first end outflow of described pipeline.
2. according to claim 1 method wherein, when the described inner space of at least a portion of described pipeline is in the higher pressure of environment stress than the outside of described pipeline, is opened described valve.
3. according to claim 2 method wherein, when the basic totality space of described pipeline reaches the uniform pressure of the environment stress that is higher than described pipeline external, is opened described valve.
4. according to claim 2 method, wherein, described pressure fluid comprises compressible gas, and described compressible gas is compressed in the inner space of described pipeline.
5. according to claim 1 method also comprises:
First end to described pipeline applies vacuum, thereby when described valve was opened, the inner space of described pipeline linked to each other with described vacuum.
6. according to claim 1 method also comprises:
Open and close repeatedly described valve, with generation increment of a series of moment in the flowing of the pressure fluid by described pipeline, thereby the described cable of towing is by at least a portion of described pipeline.
7. according to claim 1 method, wherein, described valve is set to: when detecting the first stress level in described pipeline, automatically open described valve.
8. according to claim 7 method, wherein, described valve further is set to: when described ducted Pressure Drop to the second stress level is following, automatically close described valve.
9. according to claim 8 method, wherein, described the first stress level is higher than described the second stress level.
10. according to claim 1 method also comprises:
In the portion of time during closing described valve, apply the pressurization of the first level to the second end of described pipeline; And
Apply the second level pressurization of the moment that is higher than described the first level pressurization to the second end of described pipeline.
11. method according to claim 10, wherein, the pressurization of the second level of described moment occurs in at least one the relevant really timing in the following time and carves: the inside that described the first level pressurization is applied to the time of described pipeline, described pipeline reaches the time of determining stress level, time, the longitudinal force that described valve is opened is applied in described cable with the time of mobile described cable or the time of the first end that vacuum is applied in described pipeline in described pipeline.
12. method according to claim 11 also comprises:
Determine that the pressure change introduce advances by described pipe interior and arrive the required described propagation delay of the first end of described pipeline; And
Control the determined moment based on described propagation delay.
13. method according to claim 12 wherein, is determined described propagation delay by at least a in the following technology: measure and apply sound wave at the place, an end of described pipeline and receive time interval between the described sound wave at the opposed end place of described pipeline; With the length of described pipeline divided by the spread speed by described pipeline; Measurement is exerted pressure at the place, end of described pipeline and is changed and observe time interval between the described pressure change at the opposed end place of described pipeline; Measurement is exerted pressure at the place, end of described pipeline and is changed and observe the time interval of flow rate between changing at the opposed end place of described pipeline.
14. method according to claim 1 also comprises:
Near the second end of described pipeline, apply longitudinal force to described cable, with mobile described cable longitudinally in described pipeline.
15. method according to claim 14, wherein, regularly quarter, the place applied described longitudinal force really relevant with in the following time at least one: the inside that puts on the reformed time of pressurization of described pipeline, described pipeline reaches the time of the first end that time of determining stress level, time that described valve is opened or vacuum be applied in described pipeline.
16. method according to claim 15 also comprises:
Determine the pressure change of introducing in the place, an end of described pipeline advance by described pipeline the inner space and arrive the described propagation delay that the opposed end place of described pipeline needs; And
Control the determined moment based on described propagation delay.
17. method according to claim 16 wherein, is determined described propagation delay by at least a in the following technology: measure and apply sound wave at the place, an end of described pipeline and receive time interval between the described sound wave at the opposed end place of described pipeline; With the length of described pipeline divided by the spread speed by described pipeline; Measurement is exerted pressure at the place, end of described pipeline and is changed and observe time interval between the described pressure change at the opposed end place of described pipeline; The time interval of flow rate between changing observed in measurement at end of described pipeline place's pressure change with at the opposed end place of described pipeline.
18. an equipment of being convenient to settle at pipe interior cable comprises:
Valve, this valve is set to be connected to the first end of pipeline, and wherein, described valve control pressure fluid outwards flows from the inside of described pipeline;
Controller is used for by control interface the actuating of described valve being controlled; And
Source of pressurised fluid, this source of pressurised fluid is connected to the second end of described pipeline, described pressure fluid is introduced the second end of described pipeline, wherein, cable is inserted in the second end of described pipeline, and wherein, advance to the first end of described pipeline and in the received propagation delay of described first end and definite time, described controller controls to open described valve at the pressure of the described pressure fluid that applies based on the second end place at described pipeline.
19. equipment according to claim 18 also comprises signaling interface, can indicate the state of described valve by described signaling interface.
20. equipment according to claim 18 also comprises:
Be used for measuring the sensor of the flow rate of the pressure of described pipe interior or described pressure fluid.
21. equipment according to claim 20, wherein, described controller further is configured to based on the pressure that records by pressure sensor valve be activated.
22. equipment according to claim 18 also comprises:
Timer for the actuating of controlling described valve.
23. equipment according to claim 18 also comprises:
Be connected to the vacuum generating device of the first end of described pipeline, described vacuum generating device aspirates described pressure fluid from described pipeline when described valve is opened.
24. equipment according to claim 18 also comprises:
Be used for the vacuum generating device is connected to the vacuum couplers of the first end of described pipeline.
25. a system that is used for installing at pipeline cable comprises:
Valve, this valve is connected to the far-end of pipeline; And
Source of pressurised fluid, this source of pressurised fluid is connected to the near-end of described pipeline, and described near-end is relative with the far-end of described pipeline, and wherein, the actuating of described valve affects the pressure of described pipe interior, so that cable moves towards described far-end by described pipeline; And
Propagation time is determined element, this propagation time is determined that element is determined to exert pressure in the proximal end of pipeline and changes and the time interval of observing at the far-end of pipeline between the relevant pressure change, wherein, apply pressure fluid from described source of pressurised fluid, then after the described time interval, open described valve.
26. system according to claim 25 also comprises:
Feed mechanism, this feed mechanism applies active force, with mobile described cable in described pipeline.
27. system according to claim 25 also comprises:
Feed probe, this feeds probe and surveys described cable with respect to the motion of described pipeline.
28. system according to claim 25 also comprises:
Measure the sensor of the flow of the pressure of described pipe interior or fluid.
29. system according to claim 25 also comprises:
The import barrier device, this import barrier device is used for affecting at least one of following items: the pressure that is applied to the proximal end of described pipeline by described source of pressurised fluid; Perhaps described fluid flows into the flow rate of described pipeline from described source of pressurised fluid.
30. system according to claim 25 also comprises:
Be connected to the vacuum generating device of the far-end of described pipeline, be used for the far-end suction pressure fluid from described pipeline.
31. system according to claim 25 also comprises:
Controller, at least one in its control following items: apply active force to move described cable with respect to described pipeline; The actuating of valve; Put on the pressure of the near-end of described pipeline by described source of pressurised fluid; Fluid flows into the flow rate of the inlet side of described pipeline from described source of pressurised fluid; Perhaps the vacuum generating device is to the connection of the first end of described pipeline.
32. system according to claim 31, wherein said controller is controlled in response at least one execution in the following items: the pressure of described pipe interior; By the time of timer indication; The actuating indication of described valve; Described cable is with respect to the detection of the motion of described pipeline; Cable feeds speed; Perhaps described time interval.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2006/013720 WO2007117244A1 (en) | 2006-04-12 | 2006-04-12 | Systems and methods for controlling duct pressurization for cable installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101466917A CN101466917A (en) | 2009-06-24 |
| CN101466917B true CN101466917B (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680054205.1A Expired - Fee Related CN101466917B (en) | 2006-04-12 | 2006-04-12 | System and method for controlling pipe pressurization of cable installation |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101466917B (en) |
| WO (1) | WO2007117244A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE1050003A1 (en) * | 2010-01-07 | 2011-05-31 | Allgotech Ab | Hose test printing device |
| RS66624B1 (en) * | 2016-08-04 | 2025-04-30 | Plumettaz Holding S A | DEVICE AND PROCEDURE FOR PLACING THE CABLE IN THE CHANNEL |
| EP3577508B1 (en) | 2017-02-03 | 2021-04-07 | Plumettaz Holding SA | Autonomous fluid compressor for laying optical fibers in a duct |
| CN110265926A (en) * | 2019-06-20 | 2019-09-20 | 国网江苏省电力有限公司徐州供电分公司 | A threading machine for line pipelines in walls |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3987537A (en) * | 1975-10-24 | 1976-10-26 | Teledyne Exploration Company | Method and apparatus for hydrophone streamer manufacture |
| US4185809A (en) * | 1978-01-27 | 1980-01-29 | Nelson Jonnes | Method and apparatus for pulling lightweight cable |
| US6059264A (en) * | 1994-11-23 | 2000-05-09 | Arnco Corporation | Cable feeding apparatus and method |
| US6631884B2 (en) * | 1998-10-08 | 2003-10-14 | Koninklijke Kpn N.V. | Method for installing cables in ducts using a pressurized fluid and a device for carrying out said method |
-
2006
- 2006-04-12 CN CN200680054205.1A patent/CN101466917B/en not_active Expired - Fee Related
- 2006-04-12 WO PCT/US2006/013720 patent/WO2007117244A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3987537A (en) * | 1975-10-24 | 1976-10-26 | Teledyne Exploration Company | Method and apparatus for hydrophone streamer manufacture |
| US4185809A (en) * | 1978-01-27 | 1980-01-29 | Nelson Jonnes | Method and apparatus for pulling lightweight cable |
| US6059264A (en) * | 1994-11-23 | 2000-05-09 | Arnco Corporation | Cable feeding apparatus and method |
| US6631884B2 (en) * | 1998-10-08 | 2003-10-14 | Koninklijke Kpn N.V. | Method for installing cables in ducts using a pressurized fluid and a device for carrying out said method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007117244A1 (en) | 2007-10-18 |
| HK1128947A1 (en) | 2009-11-13 |
| CN101466917A (en) | 2009-06-24 |
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