CN116184588A

CN116184588A - Armored structure reducing special optical cable and manufacturing method thereof

Info

Publication number: CN116184588A
Application number: CN202211598231.8A
Authority: CN
Inventors: 蔡召洲; 黄志新; 蔡晶; 陈重; 胡楚星; 杨晨
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-30

Abstract

The invention discloses an armored structure variable-diameter special optical cable and a manufacturing method thereof, belonging to the technical field of optical cable preparation, and comprising an optical unit, a plurality of sensors which are axially and alternately arranged along the optical unit, wherein the sensors are sleeved on the periphery of the optical unit, and the sensors are all in optical connection with the optical unit; the plurality of armoured steel wires are arranged on the periphery of the optical unit and the sensor along the axial direction of the optical unit; and the first belting layers are arranged between every two adjacent sensors and are wound on the peripheries of the armor wires along the circumferential direction of the optical unit. The special optical cable in this application mainly utilizes armoured steel wire structure along cable axial cladding at light unit and sensor periphery to utilize first band layer structure to carry out spacingly with the armoured steel wire at the axial both ends of sensor, with the periphery at light unit and sensor forms armoured structure, with protect it, solved the current optical cable that has the sensor can't install under water and lay and the problem that damages easily.

Description

Armored structure reducing special optical cable and manufacturing method thereof

Technical Field

The invention belongs to the technical field of optical cable preparation, and particularly relates to an armored structure variable-diameter special optical cable and a manufacturing method thereof.

Background

With the application of optical cables in the sensing fields of oil and gas well monitoring, underwater detection and the like, the sensors in the common sensing optical cable are miniature sensors, are wrapped in the optical cable, have weak external environment perception, cannot monitor the conditions of underwater and surrounding of the oil and gas well, and generally need to be installed at specific positions along the distribution direction of the optical cable at intervals.

At present, the conventional arrangement mode is that an optical cable is laid, then a sensor or a detector is fixedly arranged at a designated position on the outer surface of the optical cable, but the installation mode can cause complicated construction on one hand, for example, the sensor or the detector is required to be installed under water after the laying of an underwater monitoring optical cable is completed, and on the other hand, the problem that the sensor or the detector is directly exposed on the outer surface of the optical cable exists, and the sensor and the detector are easy to damage under the influence of external environment.

Disclosure of Invention

Aiming at one or more of the defects or improvement demands of the prior art, the invention provides an armored structure reducing special optical cable which is used for solving the problem that a sensor is easy to damage when monitoring in the existing underwater and oil-gas well fields.

In order to achieve the above object, the present invention provides an armored structure variable diameter special optical cable, which comprises:

a light unit;

the sensors are axially arranged at intervals along the light unit, are sleeved on the periphery of the light unit and are all in optical connection with the light unit;

a plurality of armoured steel wires, the armoured steel wires are axially arranged along the optical unit at the periphery of the optical unit and the sensor;

the first tape layers are arranged between every two adjacent sensors, and the first tape layers are circumferentially wound around the outer circumferences of the armoured steel wires along the optical unit.

As a further development of the invention, the angle between the armoured wire axis direction and the light unit axis direction is not more than 20 °.

As a further improvement of the invention, the ratio of the diameter of the light unit to the diameter of the sensor is 1 (1.2-3).

As a further improvement of the invention, the sensor further comprises a second tape layer coated on the periphery of the armored steel wire, wherein the second tape layer is aligned with the sensor along the radial direction.

The invention also comprises a manufacturing method of the armored structure reducing special optical cable, which comprises the following steps:

s1, arranging sensors at intervals along the axial direction of an optical unit to form a variable-diameter cable core;

s2, sequentially arranging an armored steel wire outlet device and a stranding head along the wire collecting direction of the variable-diameter cable core, and setting the position of the stranding head as an initial position at the moment;

s3, pulling the variable-diameter cable core, continuously leading out the armored steel wires towards a stranding head by the armored steel wire outlet device, and enabling the stranding head to be Zhou Jiaoge armored steel wires outside the variable-diameter cable core;

s4, when the sensor on the variable-diameter cable core moves to the stranding port, the stranding caliber of the stranding head is enlarged, the stranding head is moved along the wire outlet direction of the variable-diameter cable core, and the stranding caliber of the stranding head is recovered after the stranding head passes through the position of the sensor;

s5, when the current sensor on the variable-diameter cable core moves to the position of the stranding port through the initial position of the stranding head/the next sensor on the variable-diameter cable core moves to the position of the stranding port, the stranding head returns to the initial position;

and S6, when the next sensor on the diameter-variable cable core moves to the stranding port again, repeating the steps S4 and S5.

As a further improvement of the invention, the rotating speed of the twisting head is 5-10 r/min, and the traction speed of the light unit is 0.5-3 m/min.

As a further improvement of the present invention, step S2 further includes:

determining the number of armored steel wires led out by the armored steel wire outlet device; the number N of the armored steel wires is obtained by the following steps:

wherein D is the diameter of the light unit, and D is the diameter of the armored steel wire.

As a further improvement of the invention, when the sensor part is not arranged and the sensor part is arranged on the stranding head stranding variable-diameter cable core, the stranding pitch of the armoured steel wires is 0.3-3 m.

As a further improvement of the present invention, in step S3 and step S4, the twisting frequency of the portion of the twisted head twisted diameter-variable cable core where the sensor is not provided is greater than the twisting frequency of the portion of the twisted diameter-variable cable core where the sensor is provided.

As a further improvement of the present invention, step S7 is further included: and the outer periphery of the armored steel wire of the part of the variable-diameter cable core, which is not provided with the sensor, is coated with a first wrapping band.

As a further improvement of the present invention, step S7 further includes: and the outer periphery of the armored steel wire of the sensor part is coated with a second wrapping layer.

The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.

In general, the above technical solutions conceived by the present invention have the beneficial effects compared with the prior art including:

(1) According to the armored structure reducing special optical cable, the sensor is arranged in the axial direction of the optical unit, the armored steel wire and the first wrapping band layer structure form the protective structure outside the optical unit and the sensor, the armored steel wire is tensioned at two ends of the sensor by utilizing the first wrapping band layer, so that effective protection is formed at the periphery of the sensor, the sensor and the external environment are not blocked by the armored steel wire structure, and the sensing monitoring effect is ensured, and meanwhile, effective protection is formed.

(2) According to the armored structure variable-diameter special optical cable, the second wrapping layer is arranged on the periphery of the sensor, the sensor is wrapped and fixed by the second wrapping layer, the second wrapping layer can effectively protect the outside of the sensor, the armored steel wires can be fixed, the problem that the armored steel wires deviate to two sides in the using process is avoided, and the effective protection of the armored steel wires on the sensor is ensured.

(3) According to the manufacturing method of the armored structure variable-diameter special optical cable, the twisting head is arranged in a reciprocating mode, the armored steel wires are wrapped on the periphery of the optical unit by utilizing the twisting head, when the sensor moves to the twisting head, the armored steel wires at the sensor are arranged along the axial direction by moving the twisting head and passing over the sensor, the armored steel wires at the sensor are driven to twist by twisting force of the armored steel wires wrapped on the optical units at two sides of the sensor, so that the armored steel wires at the sensor are tightly tied, and finally the armored steel wires at two sides of the sensor are fixed by the wrapping tape layer, so that the stability of the obtained armored structure variable-diameter special optical cable is ensured.

Drawings

FIG. 1 is a schematic cross-sectional view of an armored construction variable diameter specialty cable in accordance with an embodiment of the present invention;

FIG. 2 is an axial schematic view of an armored structure variable diameter special optical cable in an embodiment of the present invention;

FIG. 3 is a schematic view of a first sensor covered by an armored wire in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a first sensor coated with an armored wire in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of the armored wire in contact with a second sensor in accordance with an embodiment of the present invention;

fig. 6 is a schematic view showing a structure in which the twisting head is retracted to the original position in the embodiment of the present invention.

Like reference numerals denote like technical features throughout the drawings, in particular:

1. a light unit; 2. a sensor; 3. armoured steel wires; 4. a first tape layer; 5. a second tape layer; 6. twisting heads;

21. a first sensor; 22. and a second sensor.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples:

referring to fig. 1 to 6, the armored structure reducing special optical cable in the preferred embodiment of the present invention includes an optical unit 1, a plurality of sensors 2 arranged at intervals along the axial direction of the optical unit 1, the sensors 2 are sleeved on the periphery of the optical unit 1, and the plurality of sensors 2 are all optically connected with the optical unit 1; a plurality of armoured wires 3, the armoured wires 3 being arranged on the outer periphery of the light unit 1 and the sensor 2 along the axial direction of the light unit 1; a plurality of first tape layers 4, at least one first tape layer 4 is provided between each adjacent two of the sensors 2, and the first tape layers 4 are wound around the outer circumferences of the plurality of armor wires 3 in the circumferential direction of the light unit 1.

The armoured structure reducing special optical cable mainly utilizes armoured steel wire 3 structure to cover at optical unit 1 and sensor 2 periphery along the cable axial to utilize first band layer 4 structure to carry out spacingly with armoured steel wire 3 at the axial both ends of sensor 2, with the periphery at optical unit 1 and sensor 2 forms armoured structure, with protect it, solved the problem that current optical cable with sensor 2 can't install under water and lay and damage easily.

Further, the optical unit 1 in the present application preferably includes an optical fiber or an optical fiber bundle, and an outer sheath is disposed at the outer periphery of the optical fiber or the optical fiber bundle, and a reinforcing core, a water-blocking yarn or a water-blocking paste, a stripping rope, and the like can be disposed in the outer sheath according to requirements, so that the conventional use of the optical cable is facilitated.

Of course, because the sensor 2 in the application needs to be optically connected with the optical unit 1, in order to facilitate the preparation of the optical cable, when the armored structure reducing special optical cable is applied to non-underwater environments such as oil-gas well monitoring, the outer periphery of the optical unit 1 can be protected only by the armored steel wire 3.

Further, as a preferred embodiment of the present invention, the diameter ratio of the light unit 1 to the sensor 2 in the present application is 1: (1.2-3). Because the armored steel wire 3 needs to completely cover the optical unit 1 and the sensor 2, when the diameter difference between the optical unit 1 and the sensor 2 is large, the armored steel wire 3 can cause the situation that most of the sensor 2 is exposed outside after the optical unit 1 is completely covered, the armored steel wire 3 is inconvenient for forming the variable-diameter characteristic optical cable of the armored structure, and the armored steel wire 3 is easy to deviate to the two radial sides of the optical unit 1 to expose the sensor 2 in the use process; when the sensor 2 is completely wrapped by the armored steel wire 3, the armored steel wire 3 cannot be bundled and stacked on the periphery of the optical unit 1, and the optical cable cannot be formed. Therefore, the diameter ratio of the optical unit 1 to the sensor 2 in the application needs to be strictly limited, so that after the armored structure reducing special optical cable is formed, the armored steel wire 3 can not only cover the whole periphery of the optical unit 1, but also form good protection on the periphery of the sensor 2.

It should be noted that, as shown in fig. 2, the arrangement form of the armored wire 3 and the optical unit 1 in the axial direction in the present application is close to parallel arrangement, that is, the extending direction of the armored wire 3 is consistent with the extending direction of the optical unit 1, which is convenient for the armored wire 3 to coat the sensor 2 on the periphery of the optical unit 1, but in the substantial process, in order to ensure the coating tightness of the armored wire 3 and the optical unit 1, the sensor 2, etc., the armored wire 3 is substantially twisted on the periphery of the optical unit 1 and the sensor 2, that is, the twisting intercept of the armored wire 3 is larger, the sensor 2 can be completely coated by the armored wire 3 along the axial coating form, the exposure of the sensor 2 caused by the torsion of the spiral coating is avoided, and the twisting arrangement form of the armored wire 3 can ensure the coating tightness of the armored wire 3 on the whole optical cable section.

Further, the armored steel wire 3 in the application is a steel wire structure commonly used in the field of optical cable manufacturing, the diameter of the armored steel wire is usually 0.5-3.0 mm, and the armored steel wire has good tensile property and extensibility. Preferably, the armoured steel wires 3 in the present application may also use other filament structures, such as FPR rods, carbon fiber rods, FRP strips, etc., that can form a protection around the periphery of the light unit 1 and the sensor 2.

Further, the number N of armoured wires 3 in the present application is obtained by:

where D is the diameter of the light unit 1 and D is the diameter of the armoured wire 3.

The number N of the armored wires 3 obtained through calculation in the mode is the number of the periphery of the light unit 1, so that the armored wires 3 form good protection on the light unit 1, and the armored wires 3 are conveniently stranded and formed on the periphery of the light unit 1. The number N of the armoured wires 3 is an integer, and the value obtained according to the formula 1 is rounded down.

Preferably, the sensor 2 in the present application is sleeved on the periphery of the light unit 1, and for the convenience of the overmolding of the armored wire 3, the sensor 2 is preferably of a cylindrical structure, and the sensor 2 is of a shuttle-shaped structure as a whole, so that the armored wire 3 is convenient to extend along the axial direction of the light unit 1.

Further preferably, each sensor 2 is formed by surrounding two semicircular structures, and when the sensor 2 needs to be mounted on the periphery of the light unit 1, the two semicircular structures are spliced on the light unit 1 to form the sensor. Preferably, the sensor 2 is provided with a plurality of notches for the armored steel wire 3 to pass through along the axial direction of the light unit 1, so as to facilitate the arrangement and fixation of the armored steel wire 3 along the axial direction of the light unit 1, and avoid the problem that the armored steel wire 3 deflects towards the two radial sides of the sensor 2 in the use process of the optical cable.

Still preferably, the armored structure reducing special optical cable in the application further comprises a plurality of second wrapping layers 5, wherein the number of the second wrapping layers 5 is corresponding to that of the sensors 2, so that the periphery of the armored steel wire at each sensor 2 is wrapped with the second wrapping layers 5. Because the sensor 2 external diameter is greater than the external diameter of the light unit 1 for the armoured wire 3 is when the light unit 1 is fully cladding, the armoured wire 3 of sensor 2 periphery must be the scattering form and distribute, in order to avoid sensor 2 periphery armoured wire 3 uneven distribution to cause the problem that sensor 2 part exposes totally outside, at this sensor 2 circumferential direction cladding second band layer 5, fix sensor 2 department armoured wire 3 through second band layer 5, avoid its removal. Preferably, the second cladding layer 5 extends here in the axial direction of the light unit 1, such that the second cladding layer 5 completely covers the sensor 2 to protect the sensor 2.

The application also discloses a manufacturing method of the armored structure reducing special optical cable, which is used for preparing the armored structure reducing special optical cable and comprises the following steps:

s1, arranging sensors 2 at intervals along the axial direction of an optical unit 1 to form a variable-diameter cable core;

specifically, the optical unit 1 is placed on a pay-off rack, the optical unit 1 is pulled, and the sensors 2 are sequentially arranged along the axial direction of the optical unit 1 to obtain a variable-diameter cable core;

s2, sequentially arranging an armored steel wire outlet device and a stranding head 6 along the wire collecting direction of the variable-diameter cable core, and setting the position of the stranding head 6 at the moment as an initial position;

s3, drawing the variable-diameter cable core, continuously leading out the armored steel wires 3 towards the stranding head by the armored steel wire outlet device, and arranging the stranding head 6 outside the variable-diameter cable core for Zhou Jiaoge armored steel wires 3;

alternatively, the drawing of the variable-diameter cable core is achieved by a drawing device by first passing the paying-off end of the variable-diameter cable core and the paying-off end of the armoured wire 3 through the twisting head 6 and then connecting it with the drawing device by a drawing rope.

S4, when the sensor 2 on the variable-diameter cable core moves to the stranding port, the stranding caliber of the stranding head 6 is enlarged, the stranding head 6 is moved along the wire outlet direction of the variable-diameter cable core, and the stranding caliber of the stranding head 6 is recovered after the stranding head 6 passes through the position of the sensor 2;

s5, when the next sensor 2 on the diameter-variable cable core moves to the stranding port, the stranding head 6 returns to the initial position;

and S6, when the next sensor 2 on the diameter-variable cable core moves to the stranding port again, repeating the steps S4 and S5.

Further, the application further comprises a step S7 of coating the first tape layer 4 on the periphery of the armored steel wire 3 of the part of the variable-diameter cable core, which is not provided with the sensor 2; the second wrapping layer 5 is wrapped on the outer periphery of the armored steel wire 3 of the part where the sensor 2 is arranged on the diameter-variable cable core. In order to ensure that the armored steel wire 3 is stably coated on the periphery of the optical unit 1, when the part of the variable-diameter cable core, which is not provided with the sensor 2, passes out of the initial position of the twisting opening of the twisting head 6, performing first wrapping treatment at the passing-out position so as to form a first wrapping layer 4 on the periphery of the armored steel wire; and meanwhile, carrying out second wrapping treatment on the middle position of the armored steel wire 3 corresponding to the periphery of the first sensor 2 so as to form a second wrapping layer 5 at the corresponding position of the sensor 2.

Optionally, when the distance between the first sensor 2 and the second sensor 2 exceeds 3m, the first wrapping layer 4 is only wrapped at two ends of the sensor 2, so that the stabilization of the special optical cable with the whole reducing structure cannot be realized, and the light unit 1 and the armored steel wire 3 between two adjacent sensors 2 also have a detachment problem, so that the armored steel wire 3 needs to be further subjected to the first wrapping treatment at the middle position of the distance, and the armored steel wire 3 between two adjacent sensors 2 is fixed at the periphery of the light unit 1 through the first wrapping layer 4. When the distance between the first sensor 2 and the second sensor 2 is too large, a plurality of first wrapping layers may be disposed between the two sensors to avoid the light unit 1 from being separated from the armoured wire 3.

Further, the device structure used in the manufacturing method of the special optical cable with the variable diameter structure in the application is as follows in sequence according to the traction preparation sequence of the optical cable: pay-off rack, armoured steel wire outlet device, transposition head 6, draw gear.

Further, step S2 in the present application further includes: determining the number of the armored steel wires 3 led out from the armored steel wire outlet device; the number N of armoured wires 3 is obtained by:

wherein D is the diameter of the light unit 1, and D is the diameter of the armored steel wire 3. The number of the armoured wires 3 is determined so that the armoured wires 3 completely cover the light unit 1 in the circumferential direction.

As an alternative embodiment of the present invention, the twisting position adjustment of the twisting head 6 may be a manual adjustment or an automatic adjustment by means of a device. When the manual mode is adopted, the twisting can be directly stopped when the twisting head 6 correspondingly moves. Of course, whether the position of the twisting head 6 is automatically controlled or manually adjusted, in the above step S3, the twisting frequency of the portion of the twisting head 6 where the sensor 2 is not provided of the variable diameter cable core is greater than the twisting frequency of the portion of the twisting variable diameter cable core where the sensor 2 is provided.

Further, as a preferred embodiment of the present invention, when the twisting head 6 adopts automatic adjustment, the twisting head 6 twists the portion of the variable diameter cable core where the sensor 2 is not provided and the portion where the sensor 2 is provided, and the control system controls the twisting pitch of the armoured wire 3 to be: 0.3-3 meters. Through the control of transposition pitch for armor steel wire 3 is the certain angle cladding in the periphery of sensor 2, can reduce the quantity of use of armor steel wire 3 under the prerequisite of guaranteeing to wrap up optical unit 1 and sensor 2 simultaneously under this transposition pitch, can also improve the manufacturing efficiency of this reducing structure special optical cable simultaneously.

Further, as a preferred embodiment of the present invention, when the twisting head 6 is manually adjusted, the twisting is stopped when the twisting head 6 twists the portion of the variable diameter cable core where the sensor 2 is provided, and the armoured wire 3 is coated in parallel on the outer circumference of the sensor 2. When the stranding head 6 strays the part of the variable-diameter cable core, where the sensor 2 is not arranged, the control system controls the stranding pitch of the armored steel wires 3 to be equal to: 0.3-3 m.

Further preferably, the rotational speed of the twisting head 6 is 5-10 r/min, and the traction rate of the light unit 1 is 0.5-3 m/min. By controlling the rotation speed of the twisting head 6, the traction rate of the variable-diameter cable core and the twisting pitch of the armoured steel wires 3, the axial included angle between the armoured steel wires 3 and the optical unit 1 of the formed sensor 2 and the first wrapping layer 4 of the special optical cable with the variable-diameter structure is not more than 20 degrees. The axial included angle between the armoured steel wires 3 and the light unit 1 is not larger than 20 degrees, so that the problems that the radial size of the sensor 2 is too large or the distance between the arrangement position of the first wrapping belt layer 4 and the sensor 2 is too short, the armoured steel wires 3 have large inclination, the inclination of the armoured steel wires 3 is larger when the arrangement quantity of the armoured steel wires 3 is determined, the exposed part of the sensor 2 outside the armoured steel wires 3 is larger, and an optical cable is easy to cause in the use process of the optical cable, the sensor 2 is impacted by the outside, and the armoured steel wires 3 on the periphery of the sensor 2 deviate and expose the sensor 2 can be avoided.

Further, in the step S1, the optical unit 1 may be manufactured or purchased by itself, the optical unit 1 is adjusted according to practical application requirements, and when the armored structure variable-diameter special optical cable is applied to an underwater environment, an outer sheath is preferably extruded at the periphery of the optical unit 1 to protect the internal optical fiber. When the armored structure reducing special optical cable is applied to non-underwater environments such as oil and gas wells, the sensor 2 can be directly sleeved on the periphery of the optical fiber or the optical fiber bundle, because the optical unit 1 needs to be in optical connection with the sensor 2, a skylight needs to be opened on the outer sheath after the outer sheath is arranged, and then the optical fiber is led out and connected with the sensor 2, the preparation difficulty of the special optical cable can be greatly increased, and the preparation efficiency is reduced.

Further, the armored wire outlet device is not shown in the drawings, and is arranged at the right vertical line position in fig. 3-6, namely, the outlet of the armored wire outlet device.

Optionally, in the preparation process of the optical unit 1, an abutment can be set at a fixed point in the axial direction of the optical unit 1, and the abutment is connected with the sensor 2, so as to improve the assembly efficiency of the sensor.

Further, in the above steps, the twisting head 6 is disposed on a twisting forming table, and the twisting forming table can drive the twisting head 6 to reciprocate in the cable axis direction, so as to adjust the distance between the twisting head 6 and the wire outlet device of the armored steel wire 3.

Preferably, in order to facilitate the cladding of the light unit 1 and the sensor 2 by the armoured wire 3, the sensors 2 in the present application are equally spaced in the axial direction of the light unit 1.

Preferably, the extending direction of the light unit 1 is from left to right in this application, and the sequence of the sheathing wire 3 coating the light unit 1 and the sensor 2 is from right to left. The following method for manufacturing the special optical cable with the variable diameter simulated armor structure sets the sensors 2 in the axial direction of the optical unit 1 as the first sensor 21 and the second sensor 22 for convenience of description. The optical unit 1 with the first sensor 21 and the second sensor 22 is twisted towards the twisting head 6, the twisting head 6 continuously rotates to wrap the armored steel wire 3 around the optical unit 1, when the first sensor 21 moves to the twisting head 6, the twisting head 6 is driven by the twisting forming table to move towards the outgoing line direction of the optical unit 1, the twisting head 6 passes through the position of the first sensor 21, at the moment, the twisting head 6 stops rotating, and the armored steel wire 3 wrapped along the axial direction is formed around the first sensor 21, as shown in fig. 3 and 4. The twisting head 6 continues to rotate after passing through the first sensor 21, the optical unit 1 with the sensor 2 is pulled to twist towards the twisting head 6, when the second sensor 22 is pulled to the twisting head 6, the twisting head 6 is retracted to the initial position, the twisting head 6 continues to wrap the armoured steel wires 3 around the optical unit 1, when the second sensor 22 is pulled to the twisting head 6, the twisting head 6 passes through the second sensor 22 again to form the armoured steel wires 3 wrapped along the axial direction around the second sensor 22, and the twisting head is reciprocated to wrap the armoured steel wires 3 around the optical unit 1 with the sensor 2.

Further, the length of L1 in the above step is preferably 0.6 to 5m, and the length of L2 is obtained by subtracting the axial length of the sensor 2 from the length of L1. In the conventional optical cable production process, the rotating speed of the twisting head 6 for twisting the optical unit is usually 15-20 r/min, and in the application, the rotating speed of the twisting head 6 needs to be adjusted down to 5-10 r/min, and meanwhile, the traction rate of the optical unit 1 is controlled to be 0.5-3 m/min. This is to make the armour wire 3 in the present application to be twisted, the armour wire 3 takes a twisted form, but the armour wire 3 between the sensor 2 and the first tape layers 4 on both sides is approximately wrapped in the axial direction so that there is substantially no torsion between the armour wire 3 and the sensor 2. When the sensor 2 is spirally coated by the armored steel wire 3, the sensor 2 radially protrudes out of the light unit 1 in the radial direction, so that an inclined surface structure is formed when the sensor 2 transits to the light units 1 at two sides, when the armored steel wire 3 is spirally coated and the included angle with the axial direction of the optical cable is too large, larger withdrawal torque force is generated between the armored steel wire 3 and the sensor 2, and when the sensor 2 is impacted by external water flow and the like, the sensor 2 is exposed out by the armored steel wire 3 very easily. Therefore, the rotational speed of the twisting head 6 and the pulling speed of the optical unit 1 need to be strictly controlled here to ensure that the armoured wire 3 is wrapped around the outer circumference of the optical unit 1 and the sensor 2.

Because the radial distance between the outlet of the armored steel wire 3 and the optical unit 1 is fixed, when the distance between the stranding head 6 and the outlet of the armored steel wire 3 is adjusted, the coating angle between the armored steel wire 3 and the optical unit 1 is correspondingly adjusted, and the coating tightness degree of the armored steel wire 3 on the optical unit 1 is different. The wire outlet distance between the stranding head 6 and the armored steel wire 3 is controlled, so that the armored steel wire 3 is in the looest state when correspondingly wrapping the sensor 2, namely, the loose position of the sensor 2 is formed, and the two axial ends of the sensor 2 are gradually tightened. Then, the wrapping layer is wrapped at the middle of the two adjacent sensors 2 to form a spindle-shaped armor wire 3 wrapping structure at each sensor 2.

As an alternative embodiment of the present invention, the cladding of the armor wire 3 and the cladding of the wrapping layer in the armored-structure reducing special optical cable in the present application are discontinuous procedures, that is, after the outer circumferences of the optical unit 1 and the sensor 2 are clad with the wrapping layer, the cladding procedure of the armor wire 3 is paused, the wrapping layer is fixed by adopting other fixing procedures, and then the subsequent cladding procedure of the armor wire 3 is performed. The wrapping layer structure usually adopts a metal wrapping layer, and when the wrapping layer wraps the periphery of the armored steel wire 3, the wrapping layer is not a stable wrapping structure, and the wrapping layer needs to be formed into an annular integral structure by adopting welding or other fixing procedures so as to completely fix the armored steel wire 3 on the periphery of the sensor 2 or the optical unit 1.

As an alternative embodiment of the present invention, the present application further includes another method for manufacturing an armored structure reducing special optical cable, which includes the steps of:

s2, sequentially arranging an armored steel wire outlet device and a stranding head 6 along the wire collecting direction of the variable-diameter cable core, and setting the position of the stranding head 6 as an initial position when the sensor 2 on the variable-diameter cable core moves to the stranding port of the stranding head 6;

s3, drawing the variable-diameter cable core, continuously sheathing the steel wire 3 by the stranding head 6 outside the variable-diameter cable core by Zhou Jiaoge, expanding the stranding caliber of the stranding head 6 when the sensor 2 on the variable-diameter cable core moves to the stranding port, moving the stranding head 6 along the wire outlet direction of the variable-diameter cable core, and recovering the stranding caliber of the stranding head 6 after the stranding head 6 passes through the position of the sensor 2;

s4, after the sensor 2 on the variable-diameter cable core moves through the initial position of the stranding head 6, the stranding head 6 returns to the initial position;

s5, repeating the steps S3 and S4.

This method differs from the previous manufacturing method in that after the first sensor 2 moves with the diameter-variable cable core and passes over the initial position of the twisting head 6, the twisting head 6 is directly moved back to the initial position, and then the next sensor 2 is waited for being moved to the twisting port for cladding.

Further, in the above-mentioned two methods for manufacturing the armored-structured variable-diameter special optical cable, the moving speed V1 of the stranding head 6 in the wire-outgoing direction along the variable-diameter cable core is smaller than the pulling speed V2 of the optical unit 1. When the stranding head 6 returns to the initial position, when the moving speed of the stranding head 6 is larger than the traction speed of the optical unit 1, since the armor wires 3 are wound around the periphery of the variable-diameter cable core along the traction direction end of the optical unit 1, the stranding head 6 untwists the armor wires 3 wound around the periphery of the variable-diameter cable core, so that the speed V1 of the stranding head 6 returning to the initial position is smaller than the traction speed V2 of the optical unit 1, the stranded armor wires 3 are not untwisted when the stranding head 6 is reset, and stable forming of the special optical cable with the variable-diameter structure is ensured.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. An armored structure reducing special optical cable, comprising:

a light unit;

2. The armored structural variable diameter specialty cable of claim 1, wherein said armored wire axial angle between said sensor and said first armor layer is no more than 20 ° from said optical unit axial angle.

3. The armored structural variable diameter specialty cable of claim 1, further comprising a second tape layer wrapped around the outer circumference of said armored wire, said second tape layer being radially aligned with said sensor.

4. The manufacturing method of the armored structure reducing special optical cable is characterized by comprising the following steps of:

5. The method for manufacturing a variable diameter optical cable according to claim 4, wherein the rotational speed of the twisting head is 5-10 r/min, and the traction rate of the optical unit is 0.5-3 m/min.

6. The method for manufacturing a special optical cable with a variable diameter in an armored structure according to claim 4, wherein the step S2 further comprises: determining the number of armored steel wires led out by the armored steel wire outlet device;

the number N of the armored steel wires is obtained by the following steps:

7. The method for manufacturing a special optical cable with a variable diameter in an armored structure according to claim 4, wherein when the sensor part is not arranged on the stranded head stranded variable diameter cable core and the sensor part is arranged on the stranded head stranded variable diameter cable core, the stranded pitch of the armored steel wires is 0.3-3 m.

8. The method for manufacturing a special optical cable with a variable diameter in an armor structure according to claim 4, wherein in step S3 and step S4, the stranding frequency of the stranding head stranding the portion of the variable diameter cable core where the sensor is not provided is larger than the stranding frequency of the stranding variable diameter cable core where the sensor is provided.

9. The method for manufacturing a special optical cable with a variable diameter in an armored structure according to claim 4, further comprising the step S7:

and the outer periphery of the armored steel wire of the part of the variable-diameter cable core, which is not provided with the sensor, is coated with a first wrapping band.

10. The method for manufacturing a special optical cable with a variable diameter in an armored structure according to claim 9, wherein the step S7 further comprises:

and the outer periphery of the armored steel wire of the sensor part is coated with a second wrapping layer.