CN220232068U - Intraductal structure of keeping somewhere that optical cable air-blowing laid - Google Patents

Abstract

The utility model discloses an intraductal indwelling structure for air-blowing laying of an optical cable, which comprises a guide head and an indwelling ring connected outside the guide head, wherein the indwelling ring is coaxial with the guide head, and the diameter of the indwelling ring is larger than or equal to the maximum outer diameter of the guide head; the retaining ring is a conical ring with the outer diameter gradually decreasing from the rear side to the front side. The utility model provides an in-pipe retaining structure for air-blowing laying of an optical cable, which aims to solve the problems that in the prior art, the air-blowing laying construction of the optical cable is blocked and the optical cable cannot pass through deformation points and the like due to deformation of a pipeline, and achieve the purposes of enabling the air-blown optical cable to pass when the pipeline is deformed and improving the operation efficiency.

Description

Intraductal structure of keeping somewhere that optical cable air-blowing laid

Technical Field

The utility model relates to the field of optical cable air blowing, in particular to an in-pipe indwelling structure for optical cable air blowing laying.

Background

And (3) the optical cable is laid by air blowing, namely, the optical cable is blown into a pre-buried silicon core tube or other plastic pipelines by adopting a high-pressure air flow blowing mode. The cable blowing machine blows high-pressure and high-speed compressed air into the plastic silicon core tube, the high-pressure air flow pushes the air seal piston, and the air seal piston provides tension for the optical cable, so that the penetrated optical cable rapidly passes through the pipeline in a suspended state along with the air flow to finish the required laying. For the cable blowing work of highway construction, single section pipeline distance is longer, blows the cable machine and need carry out the cable operation of blowing of 1-2km once, receives the influence of external factors such as engineering construction, and the pipeline of burying underground can appear local deformation phenomenon, leads to: the air seal piston carrying the optical cable cannot normally pass through; the gas seal piston is forced to pass through along the axial extrusion, so that the pipeline is easy to break, and the gas seal piston has great hidden trouble for long-term protection of the optical cable. In the prior art, the problems are generally overcome by adopting the operation of digging a blocking point position from the ground after the air seal piston is blocked, cutting a deformation point after digging out a pipeline and reconnecting the deformation point, the workload is large, the process is complex, and the operation efficiency of air-blowing laying of the expressway optical cable is greatly influenced.

Disclosure of Invention

The utility model provides an in-pipe retaining structure for air-blowing laying of an optical cable, which aims to solve the problems that in the prior art, the air-blowing laying construction of the optical cable is blocked and the optical cable cannot pass through deformation points and the like due to deformation of a pipeline, and achieve the purposes of enabling the air-blown optical cable to pass when the pipeline is deformed and improving the operation efficiency.

The utility model is realized by the following technical scheme:

the in-tube indwelling structure for air-blowing laying of the optical cable comprises a guide head and an indwelling ring connected outside the guide head, wherein the indwelling ring is coaxial with the guide head, and the diameter of the indwelling ring is larger than or equal to the maximum outer diameter of the guide head; the retaining ring is a conical ring with the outer diameter gradually decreasing from the rear side to the front side.

Aiming at the problems that the construction of optical cable air-blowing laying is blocked and the deformation point position cannot be passed due to the deformation of a pipeline in the prior art, the utility model provides an in-pipe retaining structure for optical cable air-blowing laying.

The retaining ring is connected with the guide head in a normal state and is coaxially arranged, and the diameter of the retaining ring is larger than or equal to the maximum outer diameter of the guide head, so that the guide head can pass through the retaining ring; when the retaining ring encounters a pipeline deformation point, the guide head and the retaining ring are separated from each other, and then the guide head continuously moves forward through the retaining ring under the pushing of the air pressure at the upstream end, and the retaining ring is retained at the pipeline deformation point.

The method and the device solve the problems that in the prior art, the air-blowing laying construction of the optical cable is blocked and cannot normally pass due to the deformation of the pipeline, can obviously reduce the frequency and the frequency of excavation and cutting operation of the pipeline in the air-blowing laying construction process of the optical cable, and obviously improve the operation efficiency; moreover, the application is kept somewhere the ring and is kept somewhere pipeline deformation department, is kept somewhere the ring and shelters from pipeline deformation point position by keeping somewhere, has not only avoided forcing the pipeline and leading to the emergence of damaged accident condition, can also protect the optical cable of passing through keeping somewhere the ring, has reduced the optical cable and has warp regional direct contact risk with the pipeline, and then is favorable to protecting the optical cable for a long time more.

It should be noted that: the front side and the rear side in the application take the advancing direction (namely the air blowing direction) of the equipment in the pipeline as the front and the opposite direction as the rear; the inner and outer parts in the application take the radial direction of the pipeline as a reference; the diameter of the indwelling ring in this application refers to the smallest inner diameter of the indwelling ring itself.

Further, the outer wall of the retaining ring is provided with a plurality of pressure sensing devices. According to the scheme, whether a pipeline deformation area enters a gap between the retaining ring and the pipe wall or not can be sensed through the pressure sensing device, and then the required function can be realized under the working condition that the pipeline deformation point position is unknown.

Further, the device also comprises jacks, a pushing piston, a connecting rod and a power assembly, wherein the jacks are annularly and uniformly distributed on the surface of the guide head, the pushing piston is in dynamic seal fit in the jacks, the connecting rod is fixedly connected with the pushing piston, and the power assembly is used for driving the pushing piston to move radially in the jacks; the outer diameter end of the connecting rod is matched with the retaining ring; when the connecting rod is positioned at the inner end of the travel in the radial direction, the connecting rod and the retaining ring are axially fixed; when the connecting rod is positioned at the outer end of the travel along the radial direction, the connecting rod is separated from the retaining ring along the axial direction.

Further, the device also comprises sliding grooves which are uniformly distributed on the inner wall of the retaining ring, the sliding grooves are open on the front side surface of the retaining ring, and one end of the connecting rod, which is far away from the pushing piston, is in sliding fit in the sliding grooves.

The outer side surface of the guide head is annularly and uniformly provided with a plurality of jacks, each jack is internally provided with a pushing piston in a dynamic seal fit manner, the specific dynamic seal manner is not limited herein, and the guide head can be realized by adopting the existing dynamic seal technology. Each pushing piston is connected with a connecting rod which extends outwards in the radial direction, the outer end of the connecting rod is positioned in a chute on the inner wall of the retaining ring, and the chute is arranged along the front-back direction and is open at the front side surface of the retaining ring.

The pushing piston moves radially under the control of the power assembly, and the pushing piston drives the connecting rod to move radially synchronously, so that the stroke of the connecting rod has two limit positions of an inner end and an outer end, the limit position of the inner end is determined by the limit position of the pushing piston controlled by the power assembly, and the limit position of the outer end can be preferably a position when the limit position is abutted with the side wall of the chute. In the scheme, when the connecting rod is positioned at the inner end of the radial travel, the connecting rod and the retaining ring are relatively fixed in the axial direction, namely, the connecting rod and the retaining ring can synchronously move in the axial direction at the moment, in the state, the guide head advances to drive the connecting rod to synchronously advance, and each connecting rod drives the retaining ring to synchronously advance; when the connecting rod is positioned at the outer end of the radial stroke, the connecting rod and the retaining ring are separated in the axial direction, namely, the connecting rod and the retaining ring can move relatively in the axial direction at the moment, in this state, the guide head moves forward, the retaining ring is not forced to move along with the connecting rod when the connecting rod is driven to move forward synchronously, the connecting rod can be separated from the retaining ring from the opening end of each sliding groove, and then the separation between the guide head and the retaining ring is finally realized, and the retaining ring is left at the deformation position in the pipe.

Further, the rear side surface of the sliding groove is flush with the rear side surface of the corresponding jack; limiting blocks which are opposite to each other are arranged on the groove walls at two sides of the sliding groove along the circumferential direction; notches matched with the limiting blocks are formed in the two opposite side walls of the connecting rod; when the connecting rod is positioned at the inner end of the radial travel, the limiting block and the notch are distributed in a dislocation manner; when the connecting rods are positioned at the outer ends of the strokes in the radial direction, the limiting blocks are opposite to the notches one by one.

In this scheme, the trailing flank of spout flushes with the trailing flank of the jack that corresponds, because connecting rod and jack are dynamic seal cooperation, consequently when the connecting rod got into the spout, the trailing flank of connecting rod also can be contacted with the trailing flank of spout to this realizes the spacing to the axial backward direction, is favorable to improving the stability of connecting rod under the operating mode that advances.

According to the scheme, the axial clutch between the connecting rod and the retaining ring is switched through the cooperation of the limiting block and the notch. Specifically, the two limiting blocks are relatively distributed on the groove walls at two sides of the chute along the circumferential direction, under the normal state, the connecting rod is positioned at the inner end of the radial stroke, the limiting blocks and the notch on the connecting rod are distributed in a staggered manner, at the moment, the complete part on the connecting rod is opposite to the limiting blocks, and the limiting blocks block the connecting rod so that the connecting rod cannot move beyond the limiting blocks, namely the connecting rod cannot axially move relative to the retaining ring, and the axial relative fixation between the connecting rod and the retaining ring is ensured; when the connecting rod is positioned at the outer end of the radial stroke, the notch on the connecting rod moves to the position opposite to the two limiting rings, at the moment, the weak part on the connecting rod is opposite to the limiting blocks, and the connecting rod can move through the area between the two limiting blocks, so that the axial separation of the connecting rod and the retaining ring can be realized.

Further, the power assembly comprises a second airflow channel positioned in the guide head and a first valve positioned in the second airflow channel, and the second airflow channel is communicated with the inner diameter end of each jack.

When the equipment normally advances, the first valve is closed, and compressed air cannot enter each jack, so that the normal advance of the whole equipment under the pushing of air flow can be ensured; when the power assembly is required to work, air is supplied to the second air flow channel, high-pressure air enters each jack, and the pushing pistons are pushed to move outwards in the radial direction, so that each connecting rod is driven to move outwards in the radial direction.

Further, the device also comprises a mounting ring fixed in the jack, wherein the mounting ring is positioned at the inner side of the pushing piston, and an elastic piece is connected between the mounting ring and the pushing piston; when no external force acts, the connecting rod is positioned at the inner end of the travel along the radial direction.

The mounting ring is of an annular structure, so that the air flow can normally enter the jack; the mounting ring is used for providing a mounting station for the elastic piece, the elastic piece can ensure that each connecting rod is positioned at the radial inner end when the equipment normally advances, and after encountering a pipeline deformation point, the retaining ring is retained at the pipeline deformation point and the guide head integrally passes through the retaining ring, the connecting rods can be reset to the radial inner end by the reset force of the elastic piece, so that the interference of each connecting rod on the follow-up advance of the guide head is reduced.

Further, an external air source for supplying air to the second air flow channel is also included.

Further, the optical cable connector is connected to the rear side of the guide head.

Further, the air seal piston is connected to the rear side of the guide head.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. the in-pipe indwelling structure for the optical cable air-blowing laying solves the problems that in the prior art, the optical cable air-blowing laying construction is blocked and cannot normally pass due to deformation of a pipeline, can obviously reduce the frequency and the frequency of excavation and cutting operation of the pipeline in the optical cable air-blowing laying construction process, and obviously improves the operation efficiency.

2. According to the intra-pipe indwelling structure for air-blowing laying of the optical cable, the indwelling ring is reserved at the deformation position of the pipeline, the deformation position of the pipeline is shielded by the indwelling ring, so that the occurrence of accident conditions of damage caused by forced extrusion of the pipeline is avoided, the optical cable passing through the indwelling ring can be protected, the direct contact risk of the optical cable and the deformation region of the pipeline is reduced, and further the long-term protection of the optical cable is facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:

FIG. 1 is a cross-sectional view of an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the retaining ring according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is a partial enlarged view at B in FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 2 at C;

fig. 6 is a schematic view of a partial structure of a connecting rod according to an embodiment of the present utility model.

In the drawings, the reference numerals and corresponding part names:

the device comprises a guide head 1, a gas seal piston 2, a 3-optical cable connector, a 4-retaining ring, a 5-torsion spring, a 6-pressure sensing device, a 7-rotating shaft, an 8-jack, a 9-pushing piston, a 10-connecting rod, a 11-sliding chute, a 12-limiting block, a 13-notch, a 14-first air flow channel, a 15-second air flow channel, a 16-first valve, a 17-mounting ring, a 18-elastic piece, a 19-third air flow channel, a 20-nozzle and a 21-second valve.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

Example 1:

the in-pipe indwelling structure for air-blowing laying of the optical cable as shown in fig. 1 and 2 comprises a guide head 1 and an indwelling ring 4 connected outside the guide head 1, wherein the indwelling ring 4 is coaxial with the guide head 1, and the drift diameter of the indwelling ring 4 is larger than or equal to the maximum outer diameter of the guide head 1; the retaining ring 4 is a tapered ring with an outer diameter gradually decreasing from the rear side to the front side. The outer wall of the retaining ring 4 is provided with a plurality of pressure sensing devices 6.

The retaining ring in this embodiment is a thin-walled annular structure, and its rear end portion may be provided with a streamline structure such as a rounded corner or a pointed end, so that after the retaining ring is retained, the upstream air-pushing force borne by the retaining ring is reduced, and the retaining stability of the retaining ring is improved.

In this embodiment, the indwelling ring 4 is a tapered ring whose outer diameter gradually decreases from the rear side to the front side. The maximum outer diameter of the retaining ring 4 is equal to the inner diameter of the pipe for the optical cable to be laid, and the minimum inner diameter of the retaining ring 4 is equal to the maximum outer diameter of the guide head 1. Preferably, the guide head 1 may also be provided in a tapered structure with a small front and a large rear so that a gap is provided between the guide head 1 and the retaining ring 4. More preferably, the taper of the guide head 1 is larger than that of the retaining ring 4, so that the gap is gradually widened from back to front, and the smooth passing of the guide head during retaining of the retaining ring is facilitated.

Example 2:

on the basis of the embodiment 1, as shown in fig. 1 to 6, the in-pipe indwelling structure for the optical cable air-blowing laying further comprises jacks 8 which are annularly and uniformly distributed on the surface of the guide head 1, pushing pistons 9 which are in dynamic seal fit in the jacks 8, connecting rods 10 which are fixedly connected with the pushing pistons 9, and a power assembly which is used for driving the pushing pistons 9 to radially move in the jacks 8; the outer diameter end of the connecting rod 10 is matched with the retaining ring 4; when the connecting rod 10 is positioned at the inner end of the travel along the radial direction, the connecting rod 10 and the retaining ring 4 are axially fixed; when the connecting rod 10 is positioned at the outer end of the travel in the radial direction, the connecting rod 10 is axially separated from the retaining ring 4.

The embodiment further comprises sliding grooves 11 which are annularly and uniformly distributed on the inner wall of the retaining ring 4, the sliding grooves 11 are opened on the front side surface of the retaining ring 4, and one end, far away from the pushing piston 9, of the connecting rod 10 is in sliding fit in the sliding grooves 11.

The rear side surface of the chute 11 is flush with the rear side surface of the corresponding jack 8; limiting blocks 12 which are opposite to each other are arranged on the groove walls of the two sides of the sliding groove 11 along the circumferential direction; notches 13 matched with the limiting blocks 12 are formed in the two opposite side walls of the connecting rod 10; when the connecting rod 10 is positioned at the inner end of the travel along the radial direction, the limiting block 12 and the notch 13 are distributed in a dislocation manner; when the connecting rod 10 is positioned at the outer end of the radial stroke, the limiting blocks 12 are opposite to the notches 13 one by one.

The power assembly comprises a second air flow channel 15 positioned in the guide head 1, and a first valve 16 positioned in the second air flow channel 15, wherein the second air flow channel 15 is communicated with the inner diameter end of each jack 8.

The device further comprises a mounting ring 17 fixed in the jack 8, wherein the mounting ring 17 is positioned on the inner side of the pushing piston 9, and an elastic piece 18 is connected between the mounting ring 17 and the pushing piston 9; when no external force is applied, the connecting rod 10 is located at the inner end of travel in the radial direction.

The air sealing device also comprises an external air source for supplying air to the second air flow channel 15, an optical cable connector 3 connected to the rear side of the guide head 1 and an air sealing piston 2 connected to the rear side of the guide head 1.

When the deformation point of the pipeline is known, the embodiment can control or judge the arrival position of the equipment through the feeding length of the optical cable, and when the equipment arrives at the deformation point, the separation mechanism is started.

When the deformation point position of the pipeline is unknown, the embodiment can be provided with a plurality of pressure sensing devices 6 on the outer wall of the retaining ring 4, the pressure sensing devices 6 are in signal connection with a controller, and the controller is used for controlling the separating mechanism.

The controller can be arranged in any feasible position inside the device, and can be arranged at the pipeline inlet of the upstream end, and the carrying optical cable is used as a signal transmission medium.

Preferably, the pressure sensing device 6 may employ a pressure sensing membrane, such as a high resistance flexible pressure sensor.

In a more preferred embodiment, the guide head further comprises a third air flow channel 19 positioned in the guide head 1 and a second valve 21 positioned in the third air flow channel 19, wherein the third air flow channel 19 is communicated with a plurality of nozzles 20, the nozzles 20 are positioned in the rear side direction of the connecting rod 10 on the outer wall of the guide head 1, and the nozzles 20 are in one-to-one correspondence with the connecting rod 10. Wherein there is only one communication between the third air flow channel 19 and the second air flow channel 15, downstream of which communication the nozzles 20 are connected by a number of branches.

In a more preferred embodiment, the jack 8 is a square hole, the pushing piston 9 is a square piston in dynamic sealing fit with the jack, the connecting rod 10 consists of an inner section and an outer section which are distributed inwards and outwards along the radial direction, wherein the outer section is of a square structure matched with the square hole, and the structure of the inner section is not limited; the outer section is always located partially within the receptacle 8 during operation of the device.

Example 3:

on the basis of the embodiment 3, as shown in fig. 1 to 6, the air seal piston 2 is hinged to the rear end face of the guide head 1 through a plurality of annular uniformly distributed torsion springs 5, and the torsion springs 5 are used for applying a forward overturning acting force to the air seal piston 2. Wherein, a plurality of annular equipartition's mounting groove is offered to the rear side terminal surface of direction head 1, all through one in any mounting groove torsional spring 5 articulated pivot 7, all pivot 7 are all fixed to be inserted establish in the atmoseal piston 2.

In the process that the air seal piston 2 passes through the retaining ring 4, the air seal piston 2 turns inwards under the limitation of the retaining ring 4 and always keeps dynamic sealing fit with the inner wall of the retaining ring 4 until the air seal piston 2 completely passes through the retaining ring 4, and then turns outwards to reset and be in dynamic sealing fit with the inner wall of the pipeline again under the action of each torsion spring 5.

The working process of the embodiment comprises the following steps:

s1, connecting an optical cable on an optical cable connector 3, and plugging an optical cable air-blowing laying passing device into a pipeline by using an automatic cable blowing plug;

s2, introducing compressed air into the pipeline to enable the guide head 1 and the retaining ring 4 to synchronously advance in the pipeline; the guide head 1 and the retaining ring 4 are kept axially fixed relatively in the advancing process;

and S3, when the retaining ring 4 encounters a pipeline deformation point, the guide head 1 and the retaining ring 4 are separated from each other through the separating mechanism, the guide head 1 continuously moves forward through the retaining ring 4, and the retaining ring 4 is retained at the pipeline deformation point.

Preferably, S3 specifically includes:

s301, when the controller receives a disengaging instruction, a first valve 16 is opened, so that high-pressure air flows into a first air flow channel 14 and enters a second air flow channel 15, and enters the inner diameter end of each jack 8 through the second air flow channel 15 to push each pushing piston 9 to move radially outwards;

s302, each pushing piston 9 drives the corresponding connecting rod 10 to move radially outwards until each connecting rod 10 abuts against the outer side wall of the corresponding chute 11, and at the moment, the notch 13 on each connecting rod 10 is opposite to the limiting block 12 in the corresponding chute 11;

s303, closing the first valve 16, and pushing the air seal piston 2 and the guide head 1 to advance by upstream compressed air until the air seal piston 2 and the guide head 1 pass through the retaining ring 4.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the term "coupled" as used herein may be directly coupled or indirectly coupled via other components, unless otherwise indicated.

Claims (10)

1. The intra-tube indwelling structure for air-blowing laying of the optical cable comprises a guide head (1) and is characterized by further comprising an indwelling ring (4) connected outside the guide head (1), wherein the indwelling ring (4) is coaxial with the guide head (1), and the drift diameter of the indwelling ring (4) is larger than or equal to the maximum outer diameter of the guide head (1); the retaining ring (4) is a conical ring with the outer diameter gradually decreasing from the rear side to the front side.

2. An intraductal indwelling structure for air blown laying of optical fibre cables according to claim 1, in which the outer wall of said indwelling ring (4) is provided with a plurality of pressure sensing means (6).

3. The in-pipe indwelling structure for air-blown laying of an optical cable according to claim 1, further comprising jacks (8) annularly and uniformly distributed on the surface of the guide head (1), pushing pistons (9) dynamically and hermetically matched in the jacks (8), connecting rods (10) fixedly connected with the pushing pistons (9), and power components for driving the pushing pistons (9) to radially move in the jacks (8); the outer diameter end of the connecting rod (10) is matched with the retaining ring (4); when the connecting rod (10) is positioned at the inner end of the travel along the radial direction, the connecting rod (10) and the retaining ring (4) are axially fixed; when the connecting rod (10) is positioned at the outer end of the travel along the radial direction, the connecting rod (10) is separated from the retaining ring (4) along the axial direction.

4. An intraductal structure of keeping somewhere of optical cable air-blowing laying according to claim 3, characterized by further comprising chute (11) of annular equipartition on keeping somewhere ring (4) inner wall, chute (11) are uncovered at the leading flank of keeping somewhere ring (4), the one end that pushing piston (9) was kept away from to connecting rod (10) is in sliding fit in chute (11).

5. An intraductal indwelling structure for air blown laying of optical cable according to claim 4, in which the rear side of said runner (11) is flush with the rear side of the corresponding jack (8); limiting blocks (12) which are opposite to each other are arranged on the groove walls of the two sides of the sliding groove (11) along the circumferential direction; notches (13) matched with the limiting blocks (12) are formed in the two opposite side walls of the connecting rod (10); when the connecting rod (10) is positioned at the inner end of the travel along the radial direction, the limiting block (12) and the notch (13) are distributed in a dislocation manner; when the connecting rod (10) is positioned at the outer end of the radial stroke, the limiting blocks (12) are opposite to the notches (13) one by one.

6. An in-line indwelling structure for air-blown laying of optical cable according to claim 4, in which said power unit comprises a second air flow passage (15) located inside the guide head (1), a first valve (16) located inside the second air flow passage (15), said second air flow passage (15) communicating with the inner diameter end of each jack (8).

7. An intraductal indwelling structure for air blown laying of optical cable according to claim 6, further comprising a mounting ring (17) fixed in said jack (8), said mounting ring (17) being located inside the ejector piston (9) and an elastic member (18) being connected between the mounting ring (17) and the ejector piston (9); when no external force is applied, the connecting rod (10) is positioned at the inner end of the travel along the radial direction.

8. An in-line indwelling structure for air-blown laying of fiber optic cable according to claim 6, further comprising an external air source for supplying air to said second air flow channel (15).

9. An in-tube indwelling structure for air-blown laying of optical cable according to claim 1, further comprising an optical cable connector (3) attached to the rear side of said guide head (1).

10. An in-tube indwelling structure for air-blown laying of optical cable according to claim 1, further comprising an air-seal piston (2) attached to the rear side of the guide head (1).