WO2020076169A1 - A fibre optic cable jetting control method and a device for implementing that method - Google Patents

A fibre optic cable jetting control method and a device for implementing that method Download PDF

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Publication number
WO2020076169A1
WO2020076169A1 PCT/PL2019/000088 PL2019000088W WO2020076169A1 WO 2020076169 A1 WO2020076169 A1 WO 2020076169A1 PL 2019000088 W PL2019000088 W PL 2019000088W WO 2020076169 A1 WO2020076169 A1 WO 2020076169A1
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WO
WIPO (PCT)
Prior art keywords
blowing
motor
cable
plc
fibre optic
Prior art date
Application number
PCT/PL2019/000088
Other languages
French (fr)
Other versions
WO2020076169A8 (en
Inventor
Przemysław FABISIAK
Krysztof BURCZYŃSKI
Original Assignee
TERMA Spółka z o.o.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TERMA Spółka z o.o. filed Critical TERMA Spółka z o.o.
Priority to EP19805777.0A priority Critical patent/EP3864449A1/en
Publication of WO2020076169A1 publication Critical patent/WO2020076169A1/en
Publication of WO2020076169A8 publication Critical patent/WO2020076169A8/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
    • G02B6/52—Underground or underwater installation; Installation through tubing, conduits or ducts using fluid, e.g. air
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
    • G02B6/54—Underground or underwater installation; Installation through tubing, conduits or ducts using mechanical means, e.g. pulling or pushing devices
    • 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

Definitions

  • the subject matter of this invention is a fibre optic cable jetting control method and a device adopting that method.
  • Fibre optic cables or microcables are jetted into a telecommunication ducting system by taking advantage of the combination of forces from two sources.
  • One of them is a mechanical feeder, which is used for pushing the fibre optic cable into the duct, and the other source is a compressor supplying compressed air pushed into that duct. Water is also used instead of air.
  • the flowing agent causes cable blowing/pulling into the duct.
  • the supporting force from the mechanical feeder permits cable jetting at considerable distances.
  • a fibre optic cable pushed into the duct becomes buckled; the higher the pushing force acting on the cable, the greater the buckling.
  • the fibre optic cable undulates in the air stream and, while pushing against the duct wall, causes an additional friction-increasing reaction perpendicularly to the duct axis.
  • the more strongly the fibre optic cable is pushed-in the greater resistance it offers. This results in the reduction of the cable movement speed in the duct and of the distance over which the cable may can be jetted into the duct.
  • the increase of the pushing force is also related to a higher risk of the fibre optic cable damage.
  • the cable moves in the duct until such time when friction resistance resulting from cable contact with the duct becomes equal to the (air/water) pulling force and to the (feeder) pushing force acting at the same time. Friction resistance is reduced through the use of liquid lubricants.
  • Devices used at present for fibre optic cable jetting into telecommunication ducting systems such devices being also called cable blowing-in machines, consist of a pneumatically, hydraulically or electrically powered mechanical feeder and of a blowing-in head combined with a feeder in a detachable or non- detachable (most often) way, the head being connected to a source of compressed air or water (rarely).
  • the cable pushing speed and blowing-in air pressure is now controlled "manually" and only on the basis of the subjective assessment and experience of the operator who analyses pressure readings and the pushing force value read on a meter or display, if the device is equipped with one.
  • the efficiency of fibre optic cable jetting requires the process parameters to be optimised in a reliable way, which means parameter control on an ongoing basis so that the cable introduction resistance will be as small as possible (therefore so that the cable pushing force will be as low as possible) with the possibly high speed and required distance of cable jetting maintained.
  • the fibre optic cable jetting control method in line with the invention consists in regulating the cable pushing speed and blowing-in air pressure by means of a PLC (programmable logic controller), which communicates with the motor regulator and blowing-in air pressure sensor, processes input signals received from them on an ongoing basis according to a predefined algorithm and sends signals setting the desirable values of the cable pushing speed and blowing-in air pressure to the blowing-in air valve assembly and, by return, to the motor regulator.
  • PLC programmable logic controller
  • the PLC sends a voltage signal specifying the valve opening degree to the blowing-in air valve assembly, and the cable pushing speed is regulated in such a way that the motor regulator receives voltage signals from the pushing force potentiometer and the pushing speed potentiometer, and also reads the voltage and intensity of the current and the frequency of power supply to the motor and, on that basis, sends the PLC the information about the value of the setpoints on the pushing force potentiometer and pushing speed potentiometer and about the present torque on the shaft of the motor and its speed. In return, the PLC sends the motor regulator the information about the required value of the motor shaft rotational speed and of the torque on the shaft of the motor. Following that, the motor regulator generates a signal causing the motor to be fed with the current with desirable voltage, intensity and frequency.
  • the device for the implementation of the fibre optic cable jetting control method in line with the invention consists of a mechanical cable feeder and of an openable blowing-in head connected with the feeder in a detachable way.
  • the cable feeder includes a three phase electric motor, worm gear combined with the motor, cable pushing belts driven by a pair of active rollers, a blowing-in air pressure sensor connected with the blowing-in head by means of a pressure measurement hose, as well as the cable length meter with a display, a PLC, motor regulator, pushing force potentiometer with a display showing the force value, and a cable pushing force potentiometer.
  • the blowing-in head is an element fitted to the fibre optic cable feeder by means of the fixing screw.
  • the head consists of two semi-cylindrical segments congruent to each other and connected with each other by means of a hinge. Along their axes, the semi-cylindrical segments feature a groove inside them, which is suitable for the placing, inside those segments, of the duct with its seal and clamping sleeve, and a fibre optic cable bipartite guide sleeve with a seal.
  • Fig. 1 is the isometric view of a device in line with the invention, with the fibre optic cable introduced into the blowing-in head and between the pushing belts.
  • Fig. 2 shows the front view of the device in line with the invention (also with the fibre optic cable introduced into the device),
  • Fig. 3 shows the isometric view of the open "charged" blowing- in head, and
  • Fig. 4 is a block diagram showing the course of signals between the elements of the device as per the invention, such elements involved in the control of the device operation.
  • the fibre optic cable jetting control method in line with the invention consists in regulating the cable pushing speed and blowing-in air pressure by means of a PLC (6), which communicates with the motor regulator (4) and blowing-in air pressure sensor (7), processes input signals received from them on an ongoing basis according to a predefined algorithm and sends signals setting the desirable values of the cable pushing speed and blowing-in air pressure to the blowing-in air valve assembly (ZP) and, by return, to the motor regulator (4).
  • a PLC (6) which communicates with the motor regulator (4) and blowing-in air pressure sensor (7), processes input signals received from them on an ongoing basis according to a predefined algorithm and sends signals setting the desirable values of the cable pushing speed and blowing-in air pressure to the blowing-in air valve assembly (ZP) and, by return, to the motor regulator (4).
  • the PLC sends a voltage signal specifying the valve opening degree to the blowing-in air valve assembly (ZP), and the cable pushing speed is regulated in such a way that the motor regulator (4) receives voltage signals from the pushing force potentiometer (13) and the pushing speed potentiometer (14), and also reads the voltage and intensity of the current and the frequency of power supply to the motor (5) and, on that basis, sends the PLC (6) the information about the value of the setpoints on the pushing force potentiometer (13) and pushing speed potentiometer (14) and about the present torque on the shaft of the motor (5) and its speed.
  • ZP blowing-in air valve assembly
  • the PLC (6) sends the motor regulator (4) the information about the required value of the rotational speed of the shaft of the electric motor (5) and of the torque on the shaft of the motor.
  • the motor regulator (4) generates a signal causing the motor to be supplied with the current with desirable voltage, intensity and frequency.
  • the device for the implementation of the fibre optic jetting control method in line with the invention consists of a mechanical cable feeder and of an openable blowing-in head (3) connected with the feeder in a detachable way.
  • the cable feeder includes a three phase electric motor (3), worm gear (8) combined with the motor, cable pushing belts (10) driven by a pair of active rollers (9), a blowing-in air pressure sensor (7) connected with the blowing-in head (3) by means of the pressure measurement hose (12), as well as the cable length meter (16) with a display (18), the PLC (6), motor regulator (4), pushing force potentiometer (17) with a display showing the force value (17), and a cable pushing force potentiometer (14).
  • the blowing-in head (3) is an element fitted to the fibre optic cable feeder by means of the fixing screw (19).
  • the head consists of two semi-cylindrical segments congruent to each other and connected with each other by means of a hinge. Along their axes, the semi-cylindrical segments feature a groove inside them, which is suitable for the placing, inside those segments, of the duct (2) with its seal (22) and clamping sleeve (23), and a bipartite guide sleeve (24) for the fibre optic cable with a seal (21).
  • the PLC (6) is directly connected with the blowing-in air pressure sensor (7) and the blowing-in valve assembly (ZP) by means of a signal course.
  • the PLC is connected with the pushing force potentiometer (13), the pushing speed potentiometer (14) and with the motor via the motor regulator (4).
  • the motor regulator (4) reads the cable pushing force value at the start and sends that information to the PLC (6), which treats that value as a point of reference. Then the controller checks the pushing force increase and, on that basis, increases the blowing-in air valve opening in predefined steps until such time as the fibre optic cable pushing force stops increasing.
  • Opening the blowing-in air valve results in the air flow increase in the duct, and so increases the speed of that air, too.
  • the speed increase generates an aerodynamic force which "pulls" the cable in the air flow direction. It is possible to increase the flow until such time as the value corresponding to the pressure drop for the given diameter and optical fibre cable ducting length is achieved, not higher, however, than the maximum compressor working pressure. When the maximum pressure or maximum valve opening has been achieved, the possibly small fibre optic cable pushing force may be maintained through the reduction of the cable pushing speed.
  • pulse blowing-in is useful for fibre optic cable jetting.
  • Pulse blowing-in consists in alternating air valve opening and closing in such a way that the pulsating air flow effect is achieved with the stop and start of the feeder drive at the same time. This takes place in variable duration cycles, that is the valve opening and closing time becomes longer with each cycle. Regulation continues as long as length of the cable blown-in in cycles is shorter than the programmed minimum threshold.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Electric Cable Installation (AREA)

Abstract

The control method of fibre optic cable jetting into a telecommunication ducting system, where the cable pushing speed and blowing-in air pressure are controlled by the PLC (6), which communicates with the motor regulator (4) and with the blowing-in air pressure sensor (7), processes input signals received from them on an ongoing basis according to predefined algorithm and sends the blowing-in air valve assembly (ZP) a voltage signal specifying the valve opening degree, and the PLC (6) sends the motor regulator (4) the information about the required value of the rotational speed of the shaft of the motor (5) and about the required value of the torque on the shaft. The device for the implementation of the control method of fibre optic cable jetting into a telecommunication ducting system; such a device includes a mechanical cable feeder and includes the PLC (6) as is an integral part of the feeder, the PLC being directly connected with the blowing-in air pressure sensor (7) and the blowing-in air valve assembly (ZP) and, via the motor regulator (4), with the motor (5), pushing force potentiometer (13) and pushing speed potentiometer (14).

Description

A FIBRE OPTIC CABLE JETTING CONTROL METHOD AND A DEVICE FOR IMPLEMENTING THAT METHOD
The subject matter of this invention is a fibre optic cable jetting control method and a device adopting that method.
Fibre optic cables or microcables are jetted into a telecommunication ducting system by taking advantage of the combination of forces from two sources. One of them is a mechanical feeder, which is used for pushing the fibre optic cable into the duct, and the other source is a compressor supplying compressed air pushed into that duct. Water is also used instead of air.
Owing to friction against the cable surface, the flowing agent causes cable blowing/pulling into the duct. The supporting force from the mechanical feeder permits cable jetting at considerable distances.
A fibre optic cable pushed into the duct (or microduct) becomes buckled; the higher the pushing force acting on the cable, the greater the buckling. As a result of buckling, the fibre optic cable undulates in the air stream and, while pushing against the duct wall, causes an additional friction-increasing reaction perpendicularly to the duct axis. The more strongly the fibre optic cable is pushed-in, the greater resistance it offers. This results in the reduction of the cable movement speed in the duct and of the distance over which the cable may can be jetted into the duct. The increase of the pushing force is also related to a higher risk of the fibre optic cable damage. The cable moves in the duct until such time when friction resistance resulting from cable contact with the duct becomes equal to the (air/water) pulling force and to the (feeder) pushing force acting at the same time. Friction resistance is reduced through the use of liquid lubricants.
Devices used at present for fibre optic cable jetting into telecommunication ducting systems, such devices being also called cable blowing-in machines, consist of a pneumatically, hydraulically or electrically powered mechanical feeder and of a blowing-in head combined with a feeder in a detachable or non- detachable (most often) way, the head being connected to a source of compressed air or water (rarely).
Those devices do not usually offer the reading of the current pushing force acting on the cable when it is jetted into the duct, and none of those devices used at present employs the feedback of that force with the cable feeding speed and with the blowing-in air pressure as a relationship used for process automation, because such devices are not equipped with appropriate electronics.
The cable pushing speed and blowing-in air pressure, the tuning of which is necessary in the control of fibre optic cable jetting, is now controlled "manually" and only on the basis of the subjective assessment and experience of the operator who analyses pressure readings and the pushing force value read on a meter or display, if the device is equipped with one.
However, the efficiency of fibre optic cable jetting requires the process parameters to be optimised in a reliable way, which means parameter control on an ongoing basis so that the cable introduction resistance will be as small as possible (therefore so that the cable pushing force will be as low as possible) with the possibly high speed and required distance of cable jetting maintained.
The fibre optic cable jetting control method in line with the invention consists in regulating the cable pushing speed and blowing-in air pressure by means of a PLC (programmable logic controller), which communicates with the motor regulator and blowing-in air pressure sensor, processes input signals received from them on an ongoing basis according to a predefined algorithm and sends signals setting the desirable values of the cable pushing speed and blowing-in air pressure to the blowing-in air valve assembly and, by return, to the motor regulator. In the case of blowing-in air pressure regulation, the PLC sends a voltage signal specifying the valve opening degree to the blowing-in air valve assembly, and the cable pushing speed is regulated in such a way that the motor regulator receives voltage signals from the pushing force potentiometer and the pushing speed potentiometer, and also reads the voltage and intensity of the current and the frequency of power supply to the motor and, on that basis, sends the PLC the information about the value of the setpoints on the pushing force potentiometer and pushing speed potentiometer and about the present torque on the shaft of the motor and its speed. In return, the PLC sends the motor regulator the information about the required value of the motor shaft rotational speed and of the torque on the shaft of the motor. Following that, the motor regulator generates a signal causing the motor to be fed with the current with desirable voltage, intensity and frequency.
The device for the implementation of the fibre optic cable jetting control method in line with the invention consists of a mechanical cable feeder and of an openable blowing-in head connected with the feeder in a detachable way. The cable feeder includes a three phase electric motor, worm gear combined with the motor, cable pushing belts driven by a pair of active rollers, a blowing-in air pressure sensor connected with the blowing-in head by means of a pressure measurement hose, as well as the cable length meter with a display, a PLC, motor regulator, pushing force potentiometer with a display showing the force value, and a cable pushing force potentiometer.
The blowing-in head is an element fitted to the fibre optic cable feeder by means of the fixing screw. The head consists of two semi-cylindrical segments congruent to each other and connected with each other by means of a hinge. Along their axes, the semi-cylindrical segments feature a groove inside them, which is suitable for the placing, inside those segments, of the duct with its seal and clamping sleeve, and a fibre optic cable bipartite guide sleeve with a seal. There is a service connection for the pressure measurement hose on one semi- cylindrical segment and a blowing-in air connection on the other segment. Following "charging," putting together and bolting with closing screws, both semi-cylindrical segments form the appropriately sealed head ready for blowing- in the fibre optic cable.
The PLC is directly connected with the blowing-in air pressure sensor and the blowing-in valve assembly by means of a signal course. The PLC is connected with the pushing force potentiometer, the pushing speed potentiometer and with the motor via the motor regulator. The subject matter of the invention is explained in a greater detail on the example of the construction based on drawings. Fig. 1 is the isometric view of a device in line with the invention, with the fibre optic cable introduced into the blowing-in head and between the pushing belts. Fig. 2 shows the front view of the device in line with the invention (also with the fibre optic cable introduced into the device), Fig. 3 shows the isometric view of the open "charged" blowing- in head, and Fig. 4 is a block diagram showing the course of signals between the elements of the device as per the invention, such elements involved in the control of the device operation.
The fibre optic cable jetting control method in line with the invention consists in regulating the cable pushing speed and blowing-in air pressure by means of a PLC (6), which communicates with the motor regulator (4) and blowing-in air pressure sensor (7), processes input signals received from them on an ongoing basis according to a predefined algorithm and sends signals setting the desirable values of the cable pushing speed and blowing-in air pressure to the blowing-in air valve assembly (ZP) and, by return, to the motor regulator (4). In the case of blowing-in air pressure regulation, the PLC sends a voltage signal specifying the valve opening degree to the blowing-in air valve assembly (ZP), and the cable pushing speed is regulated in such a way that the motor regulator (4) receives voltage signals from the pushing force potentiometer (13) and the pushing speed potentiometer (14), and also reads the voltage and intensity of the current and the frequency of power supply to the motor (5) and, on that basis, sends the PLC (6) the information about the value of the setpoints on the pushing force potentiometer (13) and pushing speed potentiometer (14) and about the present torque on the shaft of the motor (5) and its speed. In return, the PLC (6) sends the motor regulator (4) the information about the required value of the rotational speed of the shaft of the electric motor (5) and of the torque on the shaft of the motor. Following that, the motor regulator (4) generates a signal causing the motor to be supplied with the current with desirable voltage, intensity and frequency.
The device for the implementation of the fibre optic jetting control method in line with the invention consists of a mechanical cable feeder and of an openable blowing-in head (3) connected with the feeder in a detachable way. The cable feeder includes a three phase electric motor (3), worm gear (8) combined with the motor, cable pushing belts (10) driven by a pair of active rollers (9), a blowing-in air pressure sensor (7) connected with the blowing-in head (3) by means of the pressure measurement hose (12), as well as the cable length meter (16) with a display (18), the PLC (6), motor regulator (4), pushing force potentiometer (17) with a display showing the force value (17), and a cable pushing force potentiometer (14).
The blowing-in head (3) is an element fitted to the fibre optic cable feeder by means of the fixing screw (19). The head consists of two semi-cylindrical segments congruent to each other and connected with each other by means of a hinge. Along their axes, the semi-cylindrical segments feature a groove inside them, which is suitable for the placing, inside those segments, of the duct (2) with its seal (22) and clamping sleeve (23), and a bipartite guide sleeve (24) for the fibre optic cable with a seal (21). There is a service connection for the pressure measurement hose (12) on one semi-cylindrical segment and a blowing-in air connection (11) on the other segment. Following "charging," putting together and bolting with closing screws (25), both semi-cylindrical segments form the appropriately sealed head ready for blowing-in the fibre optic cable.
The PLC (6) is directly connected with the blowing-in air pressure sensor (7) and the blowing-in valve assembly (ZP) by means of a signal course. The PLC is connected with the pushing force potentiometer (13), the pushing speed potentiometer (14) and with the motor via the motor regulator (4).
The regulation of the parameters influencing the force pushing the fibre optic cable into the duct takes place as follows:
After the operator has determined the maximum safe fibre optic cable pushing force and speed setpoints by means of the potentiometers (13 and 14) designed for the purpose, the motor regulator (4) reads the cable pushing force value at the start and sends that information to the PLC (6), which treats that value as a point of reference. Then the controller checks the pushing force increase and, on that basis, increases the blowing-in air valve opening in predefined steps until such time as the fibre optic cable pushing force stops increasing.
Opening the blowing-in air valve results in the air flow increase in the duct, and so increases the speed of that air, too. The speed increase generates an aerodynamic force which "pulls" the cable in the air flow direction. It is possible to increase the flow until such time as the value corresponding to the pressure drop for the given diameter and optical fibre cable ducting length is achieved, not higher, however, than the maximum compressor working pressure. When the maximum pressure or maximum valve opening has been achieved, the possibly small fibre optic cable pushing force may be maintained through the reduction of the cable pushing speed.
In certain situations, pulse blowing-in is useful for fibre optic cable jetting. Pulse blowing-in consists in alternating air valve opening and closing in such a way that the pulsating air flow effect is achieved with the stop and start of the feeder drive at the same time. This takes place in variable duration cycles, that is the valve opening and closing time becomes longer with each cycle. Regulation continues as long as length of the cable blown-in in cycles is shorter than the programmed minimum threshold.
Explanations of drawing markings
1 Fibre optic cable
2 Duct
3 Blowing-in head
4 Motor regulator
5 Electric motor
6 - PLC
7 Blowing-in air pressure sensor
8 Worm gear
9 Active roller
10 Cable pushing belt
11 Blowing-in air connection
12 Pressure measurement hose
13 Pushing force potentiometer
14 Pushing speed potentiometer
15 On/off push buttons
16 Cable length meter
17 Pushing force value display
18 Cable length meter display
19 Screw fixing the blowing-in head to the feeder
20 Belt pressure release screw knob
21 Fibre optic cable seal
22 Duct seal
23 Duct clamping sleeve
24 (Bipartite) fibre optic cable guide sleeve
25 Blowing-in head closing screw
ZP Blowing-in air valve assembly

Claims

Patent claims
1. The fibre optic cable jetting control method using both the blowing-in (pulling) and pushing force of the air pressed into a duct and the pushing force from the mechanical cable feeder, characterised in that the cable pushing speed and blowing-in air pressure are controlled by the a PLC (6), which communicates with the motor regulator (4) and with the blowing-in air pressure sensor (7), processes input signals received from them on an ongoing basis according to predefined algorithm and sends the motor regulator (4) and blowing-in air valve assembly (ZP) the controlling signals regulating the operation of those sub assemblies.
2. The fibre optic cable jetting control method in line with claim 1 characterised in that the the motor regulator (4) receives voltage signals from the pushing force potentiometer (13) and from the pushing speed potentiometer (14), and also reads the voltage and intensity of the current and the frequency of power supply of the motor (5) and, on that basis, sends the PLC (6) the signal about the value of the setpoints on the pushing force potentiometer (13) and pushing speed potentiometer (14) and about the present torque on the shaft of the motor (5) and its speed. In return, the PLC (6) sends the motor regulator (4) the information about the required value of the rotational speed of the shaft of the motor (5) and about the required value of the torque on the shaft of the electric motor (5). Following that, the motor controller (4) generates a signal causing the motor to be supplied with the current with desirable voltage, intensity and frequency.
3. The fibre optic cable jetting control method in line with claim 1 , characterised in that the PLC (6) sends the blowing-in air valve assembly (ZP) a voltage signal specifying the valve opening degree.
4. The device for the implementation of the fibre optic cable jetting control method in line with the invention; such a device consisting of a mechanical cable feeder equipped with a three phase electric motor, worm gear and a pair of active rollers driving fibre optic cable pushing belts and a blowing-in air pressure sensor and a cable length meter with a display, and also a blowing-on head detachable from the cable feeder, the head being connected with a blowing-in air pressure sensor; the device being characterised in that it includes the PLC (6) as is an integral part of the feeder, the PLC being directly connected with the blowing-in air pressure sensor (7) and the blowing-in air valve assembly (ZP) and, via the motor regulator (4), with the motor (5), pushing force potentiometer (13) and pushing speed potentiometer (14).
PCT/PL2019/000088 2018-10-13 2019-10-11 A fibre optic cable jetting control method and a device for implementing that method WO2020076169A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19805777.0A EP3864449A1 (en) 2018-10-13 2019-10-11 A fibre optic cable jetting control method and a device for implementing that method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PLP.427410 2018-10-13
PL427410A PL237502B1 (en) 2018-10-13 2018-10-13 Method of controlling the introduction of an optical fibre cable into the telecommunications cable system and a device for implementing the method

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WO2020076169A1 true WO2020076169A1 (en) 2020-04-16
WO2020076169A8 WO2020076169A8 (en) 2020-06-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111667952A (en) * 2020-06-11 2020-09-15 黄宝春 Blowing device for power cable processing
CN113968517A (en) * 2021-09-14 2022-01-25 郑州治世长云科技有限公司 Optical cable blowing device
WO2022128888A1 (en) * 2020-12-17 2022-06-23 Fremco A/S Apparatus for installing a cable into a conduit

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Publication number Priority date Publication date Assignee Title
EP1015928A1 (en) * 1996-09-19 2000-07-05 BRITISH TELECOMMUNICATIONS public limited company Blowing head
US20150316041A1 (en) * 2014-04-30 2015-11-05 Verizon Patent And Licensing Inc. Dynamically adjustable impulse driving fluid jetting device
WO2018090043A1 (en) * 2016-11-14 2018-05-17 Radichel Bradley P Transmission line installation system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1015928A1 (en) * 1996-09-19 2000-07-05 BRITISH TELECOMMUNICATIONS public limited company Blowing head
US20150316041A1 (en) * 2014-04-30 2015-11-05 Verizon Patent And Licensing Inc. Dynamically adjustable impulse driving fluid jetting device
WO2018090043A1 (en) * 2016-11-14 2018-05-17 Radichel Bradley P Transmission line installation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111667952A (en) * 2020-06-11 2020-09-15 黄宝春 Blowing device for power cable processing
WO2022128888A1 (en) * 2020-12-17 2022-06-23 Fremco A/S Apparatus for installing a cable into a conduit
CN113968517A (en) * 2021-09-14 2022-01-25 郑州治世长云科技有限公司 Optical cable blowing device

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EP3864449A1 (en) 2021-08-18
PL427410A1 (en) 2020-04-20
WO2020076169A8 (en) 2020-06-25

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