CN203941331U - Optical cable erecting equipment - Google Patents
Optical cable erecting equipment Download PDFInfo
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- CN203941331U CN203941331U CN201420177384.XU CN201420177384U CN203941331U CN 203941331 U CN203941331 U CN 203941331U CN 201420177384 U CN201420177384 U CN 201420177384U CN 203941331 U CN203941331 U CN 203941331U
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- optical cable
- erecting equipment
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- wheel
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Abstract
A kind of optical cable erecting equipment, for optical cable is installed to pipeline, comprise: blowning installation, comprises high-pressure air source, admission gear, is connected with described pipeline with the output unit of conveying gas in described pipeline and for the input media of leading in cable in blowning installation; Drive unit, is arranged in described blowning installation, for described optical cable is pulled in described blowning installation by described input media; And sensor, for detection of the length that is transported to described ducted optical cable.This optical cable erecting equipment can detect the length of mounted optical cable, thereby monitors the installation process of optical cable.
Description
Technical field
The utility model relates to a kind of optical cable erecting equipment, particularly, relates to a kind of optical cable erecting equipment that utilizes blowing method that optical cable is installed in pipeline.
Background technology
Utilize blowing method that optical cable is installed to the known of method in pipeline.This method can reduce installs the resistance that optical cable is subject to when optical cable, and optical cable can be installed to continuously and reach hundreds of to the pipeline of several kms.
Fig. 1 is the principle schematic that a kind of optical cable erecting equipment of the prior art is shown.This optical cable erecting equipment comprise pipeline 203 for optical cable 300 is installed, for the blowning installation 201 of blowing to pipeline 203 and for by fashion of extrusion for example from spindle of fiber-optic cable go out optical cable and carry two rollers 2207 of optical cable.Further, be provided with the air intake opening 205 being communicated with source of the gas on blowning installation 201, optical cable 300, through the chamber 202 of blowning installation 201, is provided with connecting pipe 204 between blowning installation 201 and pipeline 203.In this optical cable erecting equipment, two rollers 207 rotate, drive optical cable 300 to move towards pipeline 203 by admission gear 206, simultaneously, the interior air blowing of chamber 202 to blowning installation 201 by air intake opening 205 from high-pressure air source (not shown), gas enters pipeline 203 through connecting pipe 204, blows optical cable 300 in the interior expansion of pipeline 203 and movement, so that optical cable is installed in pipeline 203 gradually.
In the optical cable erecting equipment of above-mentioned prior art, for a device that can accurately detect the installation length of optical cable 300 is not set, can only lean on the rice on optical cable 300 to mark the length of generally estimating mounted optical cable 300.When grow apart from laying optical cable 300 at complex environment in the situation that, the information such as the total length of the speed being blown into such as optical cable 300, the optical cable being blown in the unit interval are very important for laying optical cable.
Utility model content
For overcoming the defect of above-mentioned or other side of the prior art, the utility model proposes a kind of optical cable erecting equipment, can detect the length of mounted optical cable.
According to the embodiment of an aspect of the present utility model, a kind of optical cable erecting equipment is provided, for optical cable is installed to pipeline, comprise: blowning installation, comprises high-pressure air source, admission gear, is connected with described pipeline with the output unit of conveying gas in described pipeline and for the input media of leading in cable in blowning installation; Drive unit, is arranged in described blowning installation, for described optical cable is pulled in described blowning installation by described input media; And sensor, for detection of the length that is transported to described ducted optical cable.
In above-mentioned optical cable erecting equipment, described blowning installation also comprises: the first housing; And second housing, described the second housing is removably combined with described the first housing, to form the chamber of sealing.
In above-mentioned optical cable erecting equipment, described drive unit comprises: in described chamber, be arranged on driving wheel and engaged wheel on described the second housing, described driving wheel cooperates with engaged wheel, to pull the optical cable being clamped between the two.
In above-mentioned optical cable erecting equipment, described installation of sensors is in described chamber.
In above-mentioned optical cable erecting equipment, described drive unit also comprises: drive motor; And pinion wheel, be positioned at described chamber, and be arranged on the driving shaft of described drive motor.Described driving wheel comprises: wheel disc, can be arranged on the first back shaft that is arranged on described the second housing inner side rotationally; And ring part, being positioned on described wheel disc, the outside of described ring part cooperates with described engaged wheel, and the inner side of described ring part is formed with internal tooth, and described internal tooth and described pinion wheel are bonding, so that described pinion wheel drives described driving wheel to rotate.
Above-mentioned optical cable erecting equipment also comprises: integration module, and the information of described sensor is sent in described integration module; And display device, being arranged on described the first housing or the second housing, described integration module is configured to control the length that described display device shows the optical cable of described sensor detection.
In above-mentioned optical cable erecting equipment, the length information that described integration module is further configured for the optical cable detecting according to described sensor calculates described optical cable in ducted translational speed, and shows in described display device.
In above-mentioned optical cable erecting equipment, described admission gear is provided with the regulating device for regulating charge flow rate.
In above-mentioned optical cable erecting equipment, described integration module is according to regulating device described in the translational speed control of detected optical cable, to regulate the pressure of the gas in described chamber.
In above-mentioned optical cable erecting equipment, described display device is configured to be further used for showing the pressure of described chamber interior.
According to the optical cable erecting equipment of above-mentioned various embodiment of the present utility model, by detecting the length of mounted optical cable, can monitor the installation process of optical cable.
Brief description of the drawings
For the purpose of this utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, wherein:
Fig. 1 is the principle schematic that a kind of optical cable erecting equipment of the prior art is shown;
Fig. 2 is the schematic perspective view illustrating according to the optical cable erecting equipment of a kind of exemplary embodiment of the present utility model, has omitted partial shell in figure;
Fig. 3 is the anterior floor map that the optical cable erecting equipment shown in Fig. 2 is shown;
Fig. 4 is the floor map that the rear portion of the optical cable erecting equipment shown in Fig. 2 is shown;
Fig. 5 illustrates that the optical cable erecting equipment shown in Fig. 2 is at the schematic perspective view removing in the first housing situation, not shown sensor;
Fig. 6 is the floor map that the optical cable erecting equipment shown in Fig. 2 is shown;
Fig. 7 illustrates the schematic cross-section of cutting open along the axis of optical cable according to optical cable erecting equipment of the present utility model, not shown sensor;
Fig. 8 is the enlarged diagram that the A part in Fig. 7 is shown; And
Fig. 9 is the enlarged diagram that the B part in Fig. 7 is shown.
Embodiment
Although fully describe the utility model with reference to the accompanying drawing that contains preferred embodiment of the present utility model, but before describing, this should be appreciated that those of ordinary skill in the art can revise utility model described herein, obtains technique effect of the present utility model simultaneously.Therefore, must understand above description to those of ordinary skill in the art and Yan Weiyi discloses widely, and its content does not lie in the described exemplary embodiment of restriction the utility model.
Optical cable can be installed to continuously and for example there is hundreds of in the pipeline of a few km length according to the optical cable erecting equipment 100 of various exemplary embodiments of the present utility model, thereby realize the laying of optical cable in underground, buildings.
According to utility model design generally of the present utility model, a kind of optical cable erecting equipment 100 is provided, for optical cable 300 is installed to pipeline 400, comprise: blowning installation, comprises high-pressure air source, admission gear, is connected output unit to blow and the input media for leading in cable in blowning installation with described pipeline in described pipeline; Drive unit, is arranged in described blowning installation, for described optical cable is pulled in described blowning installation by described input media; And for detection of the sensor of length that is transported to described ducted optical cable.
Fig. 2 is the schematic perspective view illustrating according to the optical cable erecting equipment of a kind of exemplary embodiment of the present utility model, for ease of describing, has omitted the first housing in Fig. 2.Fig. 5 illustrates that the optical cable erecting equipment shown in Fig. 2 is at the schematic perspective view removing in the first housing situation.
As shown in Fig. 2-6, according to optical cable erecting equipment 100 of the present utility model, for optical cable 300 is installed to and is for example set in advance in the pipeline 400 of underground or buildings, blowning installation comprises high-pressure air source (not shown) for gases at high pressure are provided, with the admission gear 3 of high-pressure air source connection, be connected output unit 7 to blow to described pipeline and the input media 4 for leading in cable 300 in blowning installation with pipeline 400.Drive unit 8 is arranged in described blowning installation, for optical cable 300 is pulled in blowning installation by input media 4.Sensor is for detection of the length that is transported to described ducted optical cable.
Further, blowning installation comprises the housing 1 of being for example made up of stainless steel or rigid plastic.Housing 1 comprises the first housing 11 and the second housing 12, and described the second housing 12 is removably combined with the first housing 11, to form the chamber 2 of sealing.
In optical cable erecting equipment 100 of the present utility model, drive unit comprises: in chamber 2, be arranged on driving wheel 5 and engaged wheel 6 on the second housing 12, driving wheel 5 cooperates with engaged wheel 6, to pull the optical cable 300 being clamped between the two.The driving wheel of drive unit and engaged wheel are arranged in chamber 2, with by optical cable 300 from for example for being wound around the spool (not shown) unwinding of optical cable and optical cable 300 being incorporated in chamber 2 by input media 4.Pipeline 400 is communicated with chamber 2 by output unit 7, so that the optical cable in chamber 2 300 is blown in pipeline, thereby optical cable 300 is installed in pipeline 400, realizes the remote laying of optical cable.Installation of sensors is in chamber 2.In one embodiment, as shown in Figure 6, sensor is arranged on the upstream side of driving wheel 5 and engaged wheel 6 on the direct of travel of optical cable 300, not affect the conveying of optical cable 300.
According to the optical cable erecting equipment 100 of a kind of exemplary embodiment of the present utility model, the inner side of the first housing 11 and the second housing 12 is all formed with the recess that can be bonded to each other, the second housing 12 is for example removably combined by multiple bolt assemblies 13 with the first housing 11, to form chamber 2.
In optical cable erecting equipment 100 of the present utility model, described drive unit also comprises: the outside drive motor 51 and the pinion wheel 52 that are arranged on the first housing 11, pinion wheel 52 is positioned at chamber 2, and be arranged on the driving shaft through the drive motor 51 of the first housing 11, thereby rotated by drive motor 51 driving pinions 52.On the other hand, driving wheel 5 comprises wheel disc 54 and curved portions 53, and wheel disc 54 can be arranged on the first back shaft 56 (referring to Fig. 5) that is arranged on regularly the second housing 12 inner sides rotationally; Ring part 53 is arranged on wheel disc 54, and to rotate together with wheel disc 54, the outside 532 of ring part 53 cooperates with engaged wheel 6, to drive the optical cable 300 between the two.The inner side of ring part 53 is formed with internal tooth 531, and described internal tooth 531 is bonding with pinion wheel 52, so that pinion wheel 52 drives driving wheel 5 to rotate.
Be appreciated that by the engaging of pinion wheel 52 and internal tooth 531, can reduce the output speed of drive motor 51, and increase driving force, thereby by the mode of extrusion friction, optical cable 300 is pulled in chamber 2.Like this, optical cable 300 still has certain trend of previously having advanced after entering chamber 2, is conducive to optical cable 300 to be blown in pipeline 400.
In the interchangeable embodiment of one, can be rotated at the driving wheel of the second enclosure interior by the direct drive installation of drive motor that is for example arranged on for example direct current generator, stepper motor of the second outside and so on, and omit pinion wheel.In the interchangeable embodiment of another kind, drive motor and reduction gear can be arranged on to the outside of the second housing, make drive motor drive the driving wheel rotation that is arranged on the second enclosure interior by reduction gear.In addition, driving wheel and engaged wheel also can be arranged on respectively on the first housing and the second housing, as long as after the first housing and the combination of the second housing, driving wheel and engaged wheel can engage and drive optical cable to advance.
With reference to Fig. 5-7 and 9, in a kind of exemplary embodiment of optical cable erecting equipment of the present utility model, input media 4 comprises multi-stage sealed device.Particularly, input media 4 comprises: input pipe 41 in axial direction alternately forms successively multiple the first spill rings 42 and the second spill ring on the inwall of input pipe 72; And multiple the second sealing rings 43, be arranged on respectively in the second spill ring, and be provided with a first spill ring 42 between every two the second sealing rings 43.
As shown in Figure 9, the second sealing ring 43 that employing is arranged alternately and the first spill ring 42, can make the second sealing ring 43 of the first order of inner side form first order sealing, because optical cable 300 will slide with respect to the second sealing ring 43, between optical cable 300 and the second sealing ring 43, can not form sealing completely, and the second sealing ring 43 that has portion gas to pass through the first order is revealed from chamber 2, the gas of revealing enters the first spill ring 42 of the first order, now the first spill ring 42 of the first order forms the first order buffer air chamber of a relative closure, pressure in this first order buffer air chamber is by the pressure being less than in chamber 2.
Afterwards, the second sealing ring 43 of the second level forms second level sealing to the spill ring 42 of the first order, and there is portion gas to leak out the first spill ring 42 of the first order by the second sealing ring 43 of the second level, the gas of revealing enters the second spill ring 42 of the second level, now the second spill ring 42 of the second level forms the second level buffer air chamber of a relative closure, and the pressure in this second level buffer air chamber is by the pressure being less than in first order buffer air chamber.Like this, after multistage the second sealing ring 43 and the first spill ring 42, the pressure of the gas of leakage reduces gradually, does not finally almost have gas to be leaked to the outside of housing by input media 4.For ease of optical cable 300 enter input media 4, be provided with the second opening 411 of taper in the outside of input pipe 41.
In a kind of exemplary embodiment, input pipe 41 can be made up of two first halfbody parts with axially extended semi-cylindrical canyon, and two the first halfbody parts are placed on respectively in the first housing and the second housing, are convenient to like this install the second sealing ring 43.In the time that the first housing 11 and the second housing 12 are combined, two the first halfbody parts are the inner input pipe 41 with circular channel of the shapes such as cylindrical, polygon, ellipse in conjunction with forming outside, and the second sealing ring 43 is remained in input pipe 41.
As shown in Fig. 5-9, be provided with sealing ring 21 around chamber 2, sealing ring 21 can be arranged in any one in the first housing 11 and the second housing 12, with the first housing 11 and the second housing 12 in conjunction with time prevent from outwards leaking gas from chamber.Output unit 7 is provided with the intubate 71 of the taper engaging with pipeline 400.Particularly, output unit 7 comprises: efferent duct 72, comprises and have the Part I of less internal diameter and have the Part II compared with large diameter; Intubate 71, is inserted into Part I from the Part II of efferent duct 72, and described intubate 71 has the grafting part 711 reducing gradually at the direct of travel diameter of optical cable 300, and one end of pipeline 400 is plugged in grafting part 711.
Further, be provided with and there is flexible retaining ring 73 in the inner side of efferent duct 72 part corresponding with grafting part 711, in the time that pipeline 400 is plugged in grafting part 711, retaining ring 73 is carried out elasticity extruding to the outside of pipeline 400, thereby remains in grafting part 711 firm pipeline 400.Also be provided with the first sealing ring 74 in the inner side of retaining ring 73, to keep the sealing between pipeline 400 and chamber 2 to be combined.Optical cable 300 can pass intubate 71 in efferent duct 72, and enters in pipeline 400, thereby under the blowing of the high pressure draught in chamber 2, extend the inside along pipeline 400.For ease of the insertion of pipeline 400, be provided with the first opening 721 of taper in the outside of efferent duct 72.
In a kind of exemplary embodiment, efferent duct 72 can be made up of two second halfbody parts with axially extended semi-cylindrical canyon, two the second halfbody parts are placed on respectively in the first housing and the second housing, are convenient to like this install intubate 71, retaining ring 73 and the first sealing ring 74.In the time that the first housing 11 and the second housing 12 are combined, two the second halfbody parts are the inner efferent duct 72 with circular channel of the shapes such as cylindrical, polygon, ellipse in conjunction with forming outside, and installation intubate 71, retaining ring 73 and the first sealing ring 74 are remained in efferent duct 72.
According to the optical cable erecting equipment 100 of a kind of exemplary embodiment of the present utility model, as shown in Figure 6, sensor can comprise two roller inductors 9 of the inner side that is arranged on the second housing 12, optical cable 300 passes and drives roller inductor 9 to rotate between two roller inductors 9, at the counter that the revolution for measuring rotating shaft is installed on the rotating shaft (not shown) on the second housing 12 that is arranged on of roller inductor 9.In the time carrying optical cable 300 to the interior air blowing of pipeline 400, driving wheel 5 and engaged wheel 6 can promote optical cable 300, and the mobile roller inductor 9 that can drive of optical cable 300 synchronously rotates.
Further, optical cable erecting equipment 100 also comprises: integration module (not shown), and the information of described sensor is sent in described integration module; And being arranged on the display device 91 (referring to Fig. 3) of the first housing or the second outside, described integration module control display device 101 shows the length of the optical cable 300 that sensor detects.More specifically, utilize integration module can calculate the length of the optical cable 300 being installed in pipeline 400 according to the girth of the roller of the revolution of counted roller inductor 9 and roller inductor 9.
In the interchangeable embodiment of one, can on the first back shaft of driving wheel 5, be provided for the counter of the revolution of the first back shaft of measuring, or on the second back shaft of engaged wheel 6, be provided for the counter of the revolution of the second back shaft of measuring, so also can measure the length of the optical cable 300 being installed in pipeline 400.Like this, can help staff to control the air pressure in rotating speed and the chamber 2 of driving wheel 6 of optical cable erecting equipment 100.
In a kind of exemplary embodiment, the length information that integration module is further configured for the optical cable 300 detecting according to described sensor calculates the translational speed of optical cable 300 in pipeline 400, and shows in display device 91.For example, if the translational speed of shown optical cable 300 is less than predetermined value, for example be less than 40 meters/per second, the translational speed that can determine optical cable 300 is too slow, may be that optical cable 300 is subject to obstacle in pipeline 400, or insufficient pressure in the chamber 2 of blowning installation, thereby take further solution.
Referring to Fig. 2-5, optical cable erecting equipment 100 of the present utility model also comprises that, for the admission gear 3 to the interior conveying high-pressure gas of chamber 2, described admission gear 3 is provided with the regulating device 31 for regulating charge flow rate.For example, display device 91 shows the pressure in chamber 2, remain on about 1.6 MPas with the pressure of controlling in chamber 2 by operation regulating device 31 according to the pressure in shown chamber 2, make in the preset range of the pressure maintenance in chamber 2, to guarantee that optical cable 300 can successfully be installed in pipeline 400.
On the other hand, described integration module is according to the regulating device 31 of the translational speed control admission gear 3 of detected optical cable 300, to regulate the pressure of the gas in chamber 2.For example, if the translational speed of shown optical cable 300 is less than predetermined value, for example be less than 40 meters/per second, can determine the insufficient pressure in the chamber 2 of blowning installation, increase air inflow by operation regulating device 31, to increase the pressure of chamber 2, thereby increase air blowing intensity, improve the gait of march of optical cable 300.
In a further embodiment, as shown in Figures 2 and 3, optical cable erecting equipment 100 of the present utility model also comprises the transparency window 111 being arranged on the first housing 11, near the transparency window installation position corresponding with driving wheel and engaged wheel binding site, can observe the state of optical cable 300 between driving wheel 5 and engaged wheel 6 by transparency window 111.
According to a kind of exemplary embodiment of the present utility model, optical cable erecting equipment 100 also comprises distance adjusting means 8, for regulating the distance between engaged wheel 5 and driving wheel 6.
According to the optical cable erecting equipment of above-mentioned various embodiment of the present utility model, by detecting the length of mounted optical cable, can monitor the installation process of optical cable; Because drive unit is arranged on the inside of high-pressure chamber, optical cable can be pulled in chamber, and for optical cable provides thrust in ducted installation, this expulsive force is combined with the power of blowing of gas, be conducive to be installed in pipeline; Adopt multi-stage sealed device, can avoid to maximum length the gas leakage of chamber to outside.
It will be appreciated by those skilled in the art that, embodiment described above is exemplary, and those skilled in the art can make improvements, structure described in various embodiment can be carried out independent assortment in the case of the conflict aspect not recurring structure or principle, thereby solving on the basis of technical matters of the present utility model, realize more kinds of optical cable erecting equipments.
After describing preferred embodiment of the present utility model in detail; those of ordinary skill in the art can clearly understand; can carry out various variations and change not departing under the protection domain of the claim of enclosing and spirit, and the utility model is not also limited to the embodiment of examples cited embodiment in instructions.It should be noted that word " comprises " does not get rid of other element or step, and word " " or " one " do not get rid of multiple.In addition, any element numbers of claim should not be construed as restriction scope of the present utility model.
Claims (10)
1. an optical cable erecting equipment, for optical cable is installed to pipeline, is characterized in that, comprising:
Blowning installation, comprises high-pressure air source, admission gear, is connected with described pipeline with the output unit of conveying gas in described pipeline and for the input media of leading in cable in blowning installation;
Drive unit, is arranged in described blowning installation, for described optical cable is pulled in described blowning installation by described input media; And
Sensor, for detection of the length that is transported to described ducted optical cable.
2. optical cable erecting equipment as claimed in claim 1, is characterized in that, described blowning installation also comprises:
The first housing; And
The second housing, described the second housing is removably combined with described the first housing, to form the chamber of sealing.
3. optical cable erecting equipment as claimed in claim 2, it is characterized in that, described drive unit comprises: in described chamber, be arranged on driving wheel and engaged wheel on described the second housing, described driving wheel cooperates with engaged wheel, to pull the optical cable being clamped between the two.
4. optical cable erecting equipment as claimed in claim 2 or claim 3, is characterized in that, described installation of sensors is in described chamber.
5. optical cable erecting equipment as claimed in claim 3, is characterized in that,
Described drive unit also comprises:
Drive motor; And
Pinion wheel, is positioned at described chamber, and is arranged on the driving shaft of described drive motor, and described driving wheel comprises:
Wheel disc, can be arranged on the first back shaft that is arranged on described the second housing inner side rotationally; And
Ring part, is positioned on described wheel disc, and the outside of described ring part cooperates with described engaged wheel, and the inner side of described ring part is formed with internal tooth, and described internal tooth and described pinion wheel are bonding, so that described pinion wheel drives described driving wheel to rotate.
6. optical cable erecting equipment as claimed in claim 2 or claim 3, is characterized in that, also comprises:
Integration module, the information of described sensor is sent in described integration module; And
Display device, is arranged on described the first housing or the second housing, and described integration module is configured to control the length that described display device shows the optical cable of described sensor detection.
7. optical cable erecting equipment as claimed in claim 6, it is characterized in that, the length information that described integration module is further configured for the optical cable detecting according to described sensor calculates described optical cable in ducted translational speed, and shows in described display device.
8. optical cable erecting equipment as claimed in claim 7, is characterized in that, described admission gear is provided with the regulating device for regulating charge flow rate.
9. optical cable erecting equipment as claimed in claim 8, is characterized in that, described integration module is according to regulating device described in the translational speed control of detected optical cable, to regulate the pressure of the gas in described chamber.
10. optical cable erecting equipment as claimed in claim 9, is characterized in that, described display device is configured to be further used for showing the pressure of described chamber interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177384.XU CN203941331U (en) | 2014-04-14 | 2014-04-14 | Optical cable erecting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177384.XU CN203941331U (en) | 2014-04-14 | 2014-04-14 | Optical cable erecting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203941331U true CN203941331U (en) | 2014-11-12 |
Family
ID=51860634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420177384.XU Expired - Fee Related CN203941331U (en) | 2014-04-14 | 2014-04-14 | Optical cable erecting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203941331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110140073A (en) * | 2017-02-03 | 2019-08-16 | 普拉麦特兹控股股份公司 | For optical fiber to be laid with autonomous type fluid compression engine in the duct |
-
2014
- 2014-04-14 CN CN201420177384.XU patent/CN203941331U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110140073A (en) * | 2017-02-03 | 2019-08-16 | 普拉麦特兹控股股份公司 | For optical fiber to be laid with autonomous type fluid compression engine in the duct |
| CN110140073B (en) * | 2017-02-03 | 2020-12-08 | 普拉麦特兹控股股份公司 | Autonomous fluid compressor for laying optical fibers in a pipeline |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20210414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |