CN106848958A - A kind of cable orifice protecting device - Google Patents
A kind of cable orifice protecting device Download PDFInfo
- Publication number
- CN106848958A CN106848958A CN201710240014.4A CN201710240014A CN106848958A CN 106848958 A CN106848958 A CN 106848958A CN 201710240014 A CN201710240014 A CN 201710240014A CN 106848958 A CN106848958 A CN 106848958A
- Authority
- CN
- China
- Prior art keywords
- pulley
- fixed part
- cable
- fixed
- protection sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004224 protection Effects 0.000 claims abstract description 40
- 238000005096 rolling process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Pulleys (AREA)
Abstract
The invention discloses a kind of cable orifice protecting device, the device includes protection sleeve, pulley bracket fixed plate, pulley bracket, pulley and pulley spindle；The pulley bracket fixed plate is provided with fixes after passing through the circular hole with protection sleeve outer diameter identical circular hole, protection sleeve with the pulley bracket fixed plate；The pulley bracket includes two, and symmetrical is fixed in the pulley bracket fixed plate of the side lower part of protection sleeve；By pulley spindle between two pulley brackets, pulley can freely be rotated pulley relative to pulley spindle, and described two pulley bracket outsides are further fixed on limiting component.The present invention is prevented from the card line phenomenon that cable moves to the action deprivation of the pulley caused outside pulley region or causes using limiting component；After using limiting component, the size of pulley can be reduced, save material, while being prevented from aperture and protection sleeve ends scuffing cable.
Description
Technical field
The present invention relates to cable protection equipment technical field, in particular it relates to a kind of cable orifice protecting device.
Background technology
In power construction, present cable is frequently necessary to through pipeline or through wall mouthful, in cable is installed or is overhauled,
Usually need cable to be sent to or hauled out pipeline or through wall mouthful, because the aperture of pipeline or wall is more sharp, easily draw
Hinder cable outer layer.
Have in the prior art for protect cable for cable orifice protecting device, but the cable orifice protecting device without
Method cable is carried out it is spacing, due to cable itself bending, cause cable often to slide into outside pulley, cause the effect of pulley to be lost
Lose, increase the difficulty of drag cable, when more serious, cable can be stuck in the outside of pulley mounting bracket.Solve this in the prior art
Problem generally using the size for increasing pulley, makes the width of the width more than protection sleeve of pulley, so not only increases material
Waste, and increased the weight of pulley, convenient use.Secondly, cable is often scratched by protection sleeve, therefore during fabrication,
It is general that protection sleeve ends are polished into fillet, or rubber is set up, complex manufacturing technology.
The content of the invention
The purpose of the present invention is directed to the deficiency of prior art presence, there is provided a kind of novel cable orifice protecting device, should
Device has simple structure, easy to make, can effectively protect cable not by aperture and protection sleeve ends are scratched and cable takes off
From pulley region.
Technical scheme：The technical scheme that solve problem of the present invention is used for：
A kind of cable orifice protecting device, including protection sleeve, pulley bracket fixed plate, pulley bracket, pulley, pulley spindle；Institute
Pulley bracket fixed plate is stated to be provided with and protect sleeve outer diameter identical circular hole, protection sleeve through after the circular hole with the cunning
Wheel support fixed plate is fixed；The pulley bracket includes two, the symmetrical pulley bracket for being fixed on the side lower part for protecting sleeve
In fixed plate；Pulley is by pulley spindle between two pulley brackets, and pulley can freely be rotated relative to pulley spindle, described two
Pulley bracket outside is further fixed on limiting component.
Preferably, the limiting component includes the first fixed part, the second fixed part and limiting section；The limiting section is set
In the first fixed part and the centre of the second fixed part；First fixed part is fixed in " L " shape, the second fixed part and first is inverted
Portion's specular, the first fixed part and the second fixed part are separately fixed at two pulley bracket outsides, and the limiting section is in
Upward arc-shaped.
Preferably, length of the horizontal length of the limiting section less than pulley, first fixed part and the second fixation
Distance is 0.4-0.6cm between portion and pulley two ends top.
Preferably, being additionally provided with two gag lever posts on first fixed part and the second fixed part, two gag lever posts symmetrically set
Put, the distance between two gag lever posts are not more than the length in the level rolling face of pulley, and the gag lever post bottom is rolled with the level of pulley
The distance between face is 0.4-0.6cm.
Preferably, the limiting component includes the 3rd fixed part, the 4th fixed part and limitting casing, the 3rd fixed part
In " L " shape, the 4th fixed part and the 3rd fixed part specular, the 3rd fixed part and the 4th fixed part have two ends respectively
Portion, one of end is fixed on pulley bracket outside；Another end is fixed on the sidepiece of limitting casing, the limitting casing level
It is arranged on the oblique bottom of pulley, the length of the length less than pulley of limitting casing.
Preferably, internal diameter of the length of the pulley less than the protection sleeve；The pulley level rolls the position in face
Higher than protection sleeve inner face bottom.
Preferably, one kind being shaped as in rectangle, oval or circle of the limitting casing.
Beneficial effect：The present invention is prevented from the work that cable moves to the pulley caused outside pulley region using limiting component
With the card line phenomenon lost or cause；After using limiting component, the size of pulley can be reduced, material be saved, while can prevent
Only aperture and protection sleeve ends scratch cable.
Brief description of the drawings
Fig. 1 is the structural representation of the cable orifice protecting device of the embodiment of the present invention one；
Fig. 2 is the structural representation of the cable orifice protecting device of the embodiment of the present invention two；
Fig. 3 is the upward view of the cable orifice protecting device of the embodiment of the present invention three；
Fig. 4 is the side view of the cable orifice protecting device of the embodiment of the present invention three.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, and the present embodiment is with technical solution of the present invention
Premised under implemented, it should be understood that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.
The structure of cable orifice protecting device of the present invention is described in detail below in conjunction with several specific embodiments.
Fig. 1 illustrates the cable orifice protecting device structure of the embodiment of the present invention one, and it includes protection sleeve 1, pulley branch
Frame fixed plate 2, pulley bracket 3, pulley 4, pulley spindle 5；Pulley bracket fixed plate 2 is provided with justifies with protection sleeve 1 external diameter identical
Hole, protection sleeve 1 is welded and fixed after partially passing through the circular hole；Pulley bracket 3 is two, and symmetrical is fixed on protection sleeve 1
Side lower part pulley bracket fixed plate 2 on；Pulley 4 has bent rolling face and a level rolling face 10, bent rolling face it is symmetrical located at level
The both sides in rolling face 10.This cable orifice protecting device also includes two fixing nuts 14；The two ends of pulley spindle 5 are provided with and fixing nut
14 screw threads for coordinating, the top of pulley bracket 3 is provided with the installation fixing hole passed through for pulley spindle 5, and pulley spindle 5 passes through pulley 4
Centre bore and pulley bracket 3 on installation fixing hole after, pulley spindle 5 and pulley 4 are located at two pulleys by two ends nut 14
Between support 3.Pulley spindle 5 can be also fixed between two pulley brackets 3 with welding or other modes.Fixed rear wheel 4 can be with
Freely rotated relative to pulley spindle 5, this cable orifice protecting device also has limiting component.Limiting component includes the first fixed part
6th, the second fixed part 7 and limiting section 8；Limiting section 8 is arranged on the centre of the first fixed part 6 and the second fixed part 7；First fixed part
6 in inversion " L " shape, the first fixed part 7 and the specular of the second fixed part 6.First fixed part 6 and the second fixed part 7 are solid respectively
It is scheduled on two outsides of pulley bracket 3.Distance is 0.4- between first fixed part 6 and the second fixed part 7 and the two ends top of pulley 4
0.6cm, also dependent on being actually needed, suitably increaseds or decreases the first fixed part 6 and the second fixed part 7 and the two ends top of pulley 4
Vertical range.After unclamping clamp nut 14, limiting component can adjusting position within the specific limits, to adapt to different inlet wire sides
To.Limiting section 8 is arranged in arc-shaped, and arc-shaped design can be effectively increased can be by the size of cable.The level of limiting section 8
Length less than pulley 4 length, this ensures that cable will not be slided when by region between pulley 4 and limiting component
Go out outside pulley 4.Limiting component may be integrally formed, it is also possible to by the first fixed part 6 and 8 points of the second fixed part 7 and limiting section
Do not manufacture, be then fixed together by welding or other modes, the fixed position of limiting component can be bent into annular shape,
End can also be welded together with pad, the outside of pulley bracket is then fixed on fixing nut 14.Due to using
When, limiting component relative with conductive cable contacts and generation can be slided, and to avoid limiting component from scratching cable, limiting component can be selected
Cross section is that circular metal is made, such as stainless steel strip or aluminum strip.
When using, cable through the region limiting section 8 and pulley, into protection sleeve 1, due to limiting component
First fixed part 6 and the second fixed part 7 leave a certain distance with pulley 4, can effectively prevent cable run out of pulley 4 it
Outward, it is avoided that fixed part 6 is contacted with pulley 4 and influences pulley 4 to operate again.
Because in embodiment one, when cable passes through on the bent rolling face of pulley 4, the rotating effect of pulley 4 is not good, easily makes
Slided on pulley into cable, be unfavorable for pull cable.Therefore, on the basis of embodiment one, limiting component can be carried out
Improve, refer to Fig. 2, Fig. 2 illustrates the structure of the cable orifice protecting device of the embodiment of the present invention two, and the first of the device consolidates
Determine the fixed part 7 of portion 6 and second and be provided with two gag lever posts 9, two gag lever posts 9 are symmetrical arranged, the distance between two gag lever posts are less
The length in face 10 is rolled in the level of pulley 4, distance is 0.4- between the bottom of the gag lever post 9 and the level rolling face 10 of pulley 4
0.6cm.After unclamping clamp nut 14, limiting component can adjusting position within the specific limits, to adapt to different inlet wire directions.
In the case of not changing the distance in the bottom of gag lever post 9 and the level rolling face 10 of pulley 4, also can selectively by the first fixed part
6 and second the high level of synchronization of fixed part 7 and gag lever post 9 increase, and then increase can be by the size of cable.
When using, cable is entered by the region in the middle of the first fixed part 6, the second fixed part 7, gag lever post 9 and pulley 4
In protection sleeve 1, can effectively prevent cable from running out of outside pulley 4, moreover it is possible to prevent cable from passing through from the inclined-plane of pulley 4, keep away
Exempt from cable and produce slip with inclined-plane.
Limiting component in embodiment two can also be used cooperatively with cylindric pulley, and the distance of two gag lever posts 9 is less than circle
The length of column pulley, the symmetrical inner side for being distributed in cylindric pulley two ends of gag lever post 9, gag lever post 9 and with cylindric pulley
Certain distance is left in face, and under two protections of the gag lever post 9 with protection portion 8, cable is not fallen out outside pulley equally.Cylindric cunning
The use of wheel, further saves the material for making pulley, and pulley manufacture craft also becomes simple, and mitigates this protection device
Weight, convenient use.
Wherein, internal diameter of the length of the pulley 4 in the embodiment of the present invention one and two less than the protection sleeve 1；The cunning
The position in wheel level rolling face 10 is higher than protection sleeve 1 inner face bottom.It is so designed that, when cable passes through between pulley and limiting component
Region enter when in protection sleeve 1, do not contacted with protection sleeve 1, fillet or adopted even if protection sleeve 1 porch is not polished
Take other modes protection, it is also possible to effective to prevent protection sleeve 1 from causing to scratch to cable.
Due to the gag lever post 9 in embodiment 2, by long-term use after, outside two may be rolled under the active force of cable
Tiltedly deformation, and then contacted with pulley 4, influence the rotation of pulley 4, influence to use.Therefore, to the further improvement of limiting component, such as
Shown in Fig. 3, Fig. 4, the limiting component includes the 3rd fixed part 11, the 4th fixed part 12 and limitting casing 13, and the described 3rd fixes
Portion 11 is in " L " shape, the 4th fixed part 12 and the specular of the 3rd fixed part 11, and the 3rd fixed part 11 is distinguished with the 4th fixed part 12
With two ends, one of end is fixed on the outside of pulley bracket 3；Another end is fixed on the sidepiece of limitting casing 13,
The length of limitting casing 13 is less than the length of pulley 4, one kind being shaped as in rectangle, oval or circle of limitting casing 13.As
A kind of decision design, as shown in figure 4, limitting casing 13 is located at the oblique bottom of pulley 4, and is horizontally disposed with.As shown in figure 3, pulley 4
Level rolling face 10 is fallen into limitting casing 13 in vertical direction, and distance is 5-10cm between limitting casing 13 and pulley 4.Unclamp fastening spiral shell
After female 14, the position of limitting casing in certain scope, can be adjusted, to adapt to different inlet wire directions.Using rectangle limitting casing
When 13, sleeve pipe, the external diameter of the internal diameter slightly larger than the framework of limitting casing 13 of sleeve pipe so that set can be set in the framework periphery of limitting casing 13
Pipe can be rotated in the framework of limitting casing 13, when cable and casing-contact so that sleeve pipe is rotated in the framework of limitting casing 13, be reduced
The resistance produced when limitting casing 13 is with conductive cable contacts, is easy to pull cable.
When using, cable is entered 1 in protection sleeve after passing through limitting casing 13 by pulley 4, can as needed, in limitting casing
In the case that 13 length is not more than the length of the length of pulley 4, selectively change the size of limitting casing 9.
The present invention using limiting component be prevented from cable move to the pulley caused outside pulley region action deprivation or
The card line phenomenon for causing；After using limiting component, the size of pulley can be reduced, material is saved, at the same be prevented from aperture and
Protection sleeve ends scratch cable.
The present invention will protect sleeve to be designed to two hinged up and down parts like that also like prior art, by silk
Bar is changed the line of production raw catenary motion in nut inward turning, and screw mandrel produces pressure to cause that upper and lower two parts protection sleeve is separated to lower sleeve portion,
And then the aperture suitable for sizes uses.The above is only the preferred embodiment of the present invention, it is noted that for this
For the those of ordinary skill of technical field, under the premise without departing from the principles of the invention, some improvement and profit can also be made
Decorations, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of cable orifice protecting device, including protection sleeve（1）, pulley bracket fixed plate（2）, pulley bracket（3）, pulley
（4）And pulley spindle（5）, it is characterised in that：The pulley bracket fixed plate（2）It is provided with and protection sleeve（1）External diameter identical
Circular hole, protects sleeve（1）Fixed with the pulley bracket fixed plate after through the circular hole；The pulley bracket（3）Including two
Individual, symmetrical is fixed on protection sleeve（1）Side lower part pulley bracket fixed plate（2）On；Pulley（4）By pulley spindle（5）
Located at two pulley brackets（3）Between, pulley（4）Can be relative to pulley spindle（5）Freely rotate, described two pulley brackets（3）Outward
Side is further fixed on limiting component.
2. cable orifice protecting device according to claim 1, it is characterised in that：The limiting component includes that first fixes
Portion（6）, the second fixed part（7）And limiting section（8）；The limiting section（8）It is arranged on the first fixed part（6）With the second fixed part
（7）Centre；First fixed part（6）In inversion " L " shape, the second fixed part（7）With the first fixed part（6）Specular,
First fixed part（6）With the second fixed part（7）It is separately fixed at two pulley brackets（3）Outside, the limiting section（8）In upward
Arc-shaped.
3. cable orifice protecting device according to claim 2, it is characterised in that：The limiting section（8）Horizontal length
Less than pulley（4）Length, first fixed part（6）With the second fixed part（7）Distance is between the top of pulley two ends
0.4-0.6cm。
4. cable orifice protecting device according to claim 2, it is characterised in that：First fixed part（6）With second
Fixed part（7）On be additionally provided with two gag lever posts（9）, two gag lever posts（9）It is symmetrical arranged, the distance between two gag lever posts are not more than to be slided
Wheel（4）Level rolling face（10）Length, the gag lever post bottom and pulley（4）Level rolling face（10）The distance between be
0.4-0.6cm。
5. cable orifice protecting device according to claim 1, it is characterised in that：The limiting component includes that the 3rd fixes
Portion（11）, the 4th fixed part（12）And limitting casing（13）, the 3rd fixed part（11）In " L " shape, the 4th fixed part（12）With
3rd fixed part（11）Specular, the 3rd fixed part（11）With the 4th fixed part（12）It is separately fixed at two pulley brackets
（3）Outside；The limitting casing（13）It is horizontally set on the oblique bottom of pulley (4), limitting casing（13）Length be less than pulley（4）'s
Length.
6. the cable orifice protecting device according to claim 3 or 4, it is characterised in that：The pulley（4）Length be less than
The protection sleeve（1）Internal diameter；The pulley level rolls face（10）Position higher than protection sleeve（1）Inner face bottom.
7. cable orifice protecting device according to claim 5, it is characterised in that：The limitting casing（13）Be shaped as square
One kind in shape, ellipse or circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710240014.4A CN106848958A (en) | 2017-04-13 | 2017-04-13 | A kind of cable orifice protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710240014.4A CN106848958A (en) | 2017-04-13 | 2017-04-13 | A kind of cable orifice protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106848958A true CN106848958A (en) | 2017-06-13 |
Family
ID=59146837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710240014.4A Pending CN106848958A (en) | 2017-04-13 | 2017-04-13 | A kind of cable orifice protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106848958A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879182A (en) * | 2017-11-11 | 2018-04-06 | 邹城市邹旺食用菌有限公司 | A kind of electric power actinobacillus wheel suitable for multiple diameter cable |
| CN111244841A (en) * | 2020-03-20 | 2020-06-05 | 张文彩 | MPP cable protection pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735505A (en) * | 1995-04-03 | 1998-04-07 | Data Connections, Inc. | Cable pulley device and method |
| CN203289021U (en) * | 2013-02-06 | 2013-11-13 | 中国十七冶集团有限公司 | Nested hole protection device for cable pay-off |
| CN103715635A (en) * | 2013-09-30 | 2014-04-09 | 无锡市神力通信工程有限公司 | Cable laying auxiliary guide wheel |
| US20140138496A1 (en) * | 2012-11-16 | 2014-05-22 | Jameson, Llc | Aerial sheave device |
| CN203707651U (en) * | 2014-03-10 | 2014-07-09 | 国家电网公司 | Line laying pulley for multi-specification cables |
| CN203895862U (en) * | 2014-06-17 | 2014-10-22 | 国网山东齐河县供电公司 | Novel house-service wire barrow |
| CN204131008U (en) * | 2014-09-26 | 2015-01-28 | 国网山东省电力公司潍坊供电公司 | The comprehensive guider of a kind of cable laying |
| CN104934896A (en) * | 2015-06-05 | 2015-09-23 | 天津送变电工程公司 | Pulley capable of preventing leads from jumping in power transmission line engineering and construction technology of pulley |
| CN106532570A (en) * | 2016-12-07 | 2017-03-22 | 国网山东省电力公司烟台供电公司 | Power line construction wire drawing device |
-
2017
- 2017-04-13 CN CN201710240014.4A patent/CN106848958A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735505A (en) * | 1995-04-03 | 1998-04-07 | Data Connections, Inc. | Cable pulley device and method |
| US20140138496A1 (en) * | 2012-11-16 | 2014-05-22 | Jameson, Llc | Aerial sheave device |
| CN203289021U (en) * | 2013-02-06 | 2013-11-13 | 中国十七冶集团有限公司 | Nested hole protection device for cable pay-off |
| CN103715635A (en) * | 2013-09-30 | 2014-04-09 | 无锡市神力通信工程有限公司 | Cable laying auxiliary guide wheel |
| CN203707651U (en) * | 2014-03-10 | 2014-07-09 | 国家电网公司 | Line laying pulley for multi-specification cables |
| CN203895862U (en) * | 2014-06-17 | 2014-10-22 | 国网山东齐河县供电公司 | Novel house-service wire barrow |
| CN204131008U (en) * | 2014-09-26 | 2015-01-28 | 国网山东省电力公司潍坊供电公司 | The comprehensive guider of a kind of cable laying |
| CN104934896A (en) * | 2015-06-05 | 2015-09-23 | 天津送变电工程公司 | Pulley capable of preventing leads from jumping in power transmission line engineering and construction technology of pulley |
| CN106532570A (en) * | 2016-12-07 | 2017-03-22 | 国网山东省电力公司烟台供电公司 | Power line construction wire drawing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879182A (en) * | 2017-11-11 | 2018-04-06 | 邹城市邹旺食用菌有限公司 | A kind of electric power actinobacillus wheel suitable for multiple diameter cable |
| CN111244841A (en) * | 2020-03-20 | 2020-06-05 | 张文彩 | MPP cable protection pipe |
| CN111244841B (en) * | 2020-03-20 | 2021-04-23 | 浙江荣正管业有限公司 | MPP cable protection pipe |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170613 |
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| WD01 | Invention patent application deemed withdrawn after publication |