CN105469851B - Elevator network cable and its manufacture method - Google Patents
Elevator network cable and its manufacture method Download PDFInfo
- Publication number
- CN105469851B CN105469851B CN201610027072.4A CN201610027072A CN105469851B CN 105469851 B CN105469851 B CN 105469851B CN 201610027072 A CN201610027072 A CN 201610027072A CN 105469851 B CN105469851 B CN 105469851B
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- periphery
- insulating barrier
- oversheath
- network cable
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 57
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000004888 barrier function Effects 0.000 claims abstract description 26
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 230000006872 improvement Effects 0.000 claims abstract description 14
- 238000004513 sizing Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000011889 copper foil Substances 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000011888 foil Substances 0.000 claims description 19
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000005253 cladding Methods 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 7
- 229920001778 nylon Polymers 0.000 claims description 7
- 239000005030 aluminium foil Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 241001589086 Bellapiscis medius Species 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000004709 Chlorinated polyethylene Substances 0.000 description 14
- 229920000915 polyvinyl chloride Polymers 0.000 description 11
- 239000004800 polyvinyl chloride Substances 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 7
- 230000008054 signal transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/041—Flexible cables, conductors, or cords, e.g. trailing cables attached to mobile objects, e.g. portable tools, elevators, mining equipment, hoisting cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
Landscapes
- Insulated Conductors (AREA)
- Ropes Or Cables (AREA)
Abstract
The present invention is applied to field of cable technology, there is provided a kind of elevator network cable and its manufacture method.It includes some conductors, insulating barrier, screen layer, oversheath and tensile steel wire, and insulating barrier wraps up the periphery of conductor, and screen layer wraps up the periphery of insulating barrier, and oversheath wraps up the periphery of screen layer, and tensile steel wire is embedded in oversheath.Conductor is twisted into beam using multiply naked copper and copper foil wire through meticulous strand and essence, be provided between insulating barrier and screen layer it is middle by liner sheath, it is middle to be made up of the improvement sizing material that PVC material is mixed with CPE materials by liner sheath.Conductor in the present invention is twisted into beam using multiply naked copper and copper foil wire through meticulous strand and essence, and set between insulating barrier and screen layer during the improvement sizing material mixed by PVC material and CPE materials is made by liner sheath, so as to increase the elasticity and flexibility of the elevator network cable, greatly strengthen using reversed bending life-span and signal source transmission stability and anti-interference.
Description
Technical field
The present invention relates to a kind of cable, more particularly to a kind of elevator network cable and its manufacture method.
Background technology
Elevator network cable can provide piece electrical control in the case where suspension length is more long, while bear machinery should
Power.It can be used to hang use occasion over long distances because carrying cable core using steel wire.
The defect that current elevator monitoring network-specific cable is present is：Use time in use is left in half a year
Right just disconnected heart yearn, it is present, and service life is short, and the stability of signal transmission does not reach requirement, and anti-jamming effectiveness is bad
Shortcoming, inconvenience and puzzlement are caused to user and installing engineering business.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of long service life and the good electricity of stable signal transmission
Terraced network cable.
The present invention is achieved in that a kind of elevator network cable, including some conductors, insulating barrier, screen layer, oversheath
And tensile steel wire, the periphery of the insulating barrier parcel conductor, the screen layer wraps up the periphery of the insulating barrier, described
Oversheath wraps up the periphery of the screen layer, and the tensile steel wire is embedded in the oversheath；The conductor is naked using multiply
Copper and copper foil wire are twisted into beam through meticulous strand and essence, are provided between the insulating barrier and the screen layer middle by liner sheath, institute
State and middle be made up of the improvement sizing material that PVC material is mixed with CPE materials by liner sheath.
Further, the oversheath is made up of the improvement sizing material that PVC material is mixed with CPE materials.
Further, mass ratio of the CPE materials in the improvement sizing material is between 4%~8%.
Further, the insulating barrier is made up of PE materials.
Further, the middle aluminium foil mark that is provided between liner sheath and the insulating barrier draws layer.
Further, the aluminium foil mark draws and tension nylon wire is filled with layer.
Further, the screen layer includes naked copper wire mesh braided layer and foil shielding layer, and the foil shielding layer wraps up institute
The middle periphery by liner sheath is stated, the naked copper wire mesh braided layer wraps up the periphery of the foil shielding layer.
Further, the count of the naked copper wire mesh braided layer is more than 90%.
Present invention also offers a kind of manufacture method of elevator network cable as described above, the manufacture method includes following
Step：
A, using multiply thin copper wire and copper foil wire precision process bunchy, conductor is obtained；
B, the insulating barrier for being made up the good conductor of process of PE materials of one layer of extrusion molding production line pressing and wrapping it
Afterwards, then by obtaining some the root network heart yearns after segmentation；
C, some the root network heart yearns are matched two-by-two by high-speed pair twister, and according to the lay of technological requirement, point
It is other some to network heart yearn to being twisted into；
D, tension nylon wire is filled between some heart yearns to network by multiple strand cable-former, and intersected and be twisted into again
Beam；
E, by extrusion molding production line extrude suppress, in all of network heart yearn periphery cladding one layer by PVC material with
CPE materials mix in by liner sheath；
F, by high-speed knitter in it is middle by liner sheath periphery woven shield；
G, by extruding compacting on extrusion molding production line, in one layer of woven screen layer periphery cladding by PVC material
The oversheath mixed with CPE materials, and it is embedded in two tensile steel wires for playing carrying to network heart yearn in oversheath.
Further, in the step f, screen layer includes naked copper wire mesh braided layer and foil shielding layer, high-speed knitter
First knit out during foil shielding layer is coated by the periphery of liner sheath, then knit out naked copper wire mesh braided layer cladding foil shielding layer
Periphery.
Compared with prior art, beneficial effect is the present invention：Conductor in the present invention uses multiply naked copper and copper foil wire
Beam is twisted into through meticulous strand and essence, and the improvement mixed by PVC material and CPE materials is set between insulating barrier and screen layer
Sizing material be made in by liner sheath, so as to increase the elasticity and flexibility of the elevator network cable, greatly strengthen using following
Ring flex life and signal source transmission stability and interference free performance, solve user and installing engineering business frequently changes cable
Inconvenience and puzzlement.
Brief description of the drawings
Fig. 1 is elevator network cable cross-sectional view provided in an embodiment of the present invention；
Fig. 2 is the bend resistance flexible test analysis chart of the elevator network cable of embodiment illustrated in fig. 1.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, a kind of elevator network cable of the embodiment of the present invention, it includes some conductors 1, insulating barrier 2, shielding
Layer 3, oversheath 4 and tensile steel wire 5, insulating barrier 2 are wrapped in the periphery of conductor 1, and screen layer 3 is wrapped in the periphery of insulating barrier 2,
Oversheath 4 is wrapped in the periphery of screen layer 3, in the insertion oversheath 4 of tensile steel wire 5.Conductor 1 is passed through using multiply naked copper and copper foil wire
It is meticulous strand and essence be twisted into beam, be provided between insulating barrier 2 and screen layer 3 it is middle by liner sheath 6, it is middle by liner sheath 6 by PVC
(Polyvinyl chloride polyvinyl chloride) material and CPE (Chlorinated Polyethylene haloflexes) material
The improvement sizing material for mixing is made, and mass ratio of the CPE materials in sizing material is improved is between 4%~8%, the improvement glue
Expect to wave elastomer glue stock for low viscosity strength extruding height so that the elevator network cable can strengthen its elasticity and flexibility,
Improve stretching resistance and resist and wave, so as to increase the service life.Simultaneously as by liner sheath 6 by the tight of conductor 1 in this,
Stability action is played so as to the signal transmission to the elevator network cable.
In the present embodiment, by CPE materials improve sizing material in mass ratio be arranged on 5%, the cable it is elastic and soft
It is soft to reach an optimal effectiveness.Refer to shown in Fig. 2, laboratory report, the electricity are analyzed by bend resistance flexible test
The use reversed bending life-span of terraced network cable be can reach more than 500,000 times, and the use of conventional conventional lift network cable is followed
Ring flex life can only be at 5000 times or so, it follows that the elevator network cable is conventional lift network cable service life
More than 100 times, substantially prolongs service life, solve user and installing engineering business frequently change the inconvenience of elevator cable
And puzzlement, and economic benefit can be brought.
In above-described embodiment, the quantity of conductor 1 is set according to actual requirement, and it is passed through by multiply thin copper wire and copper foil wire
Thin strand is twisted into beam with precision, and the stretching resistance and drawing that increased the cable wave performance.Oversheath 4 is also by PVC material and CPE materials
The improvement sizing material for mixing is made, and component ratio of the CPE materials in the improvement sizing material is also disposed between 4%~8%,
Effect is optimal when 5%, so as to further improve the stretching resistance of the elevator network cable and resist wave.
In above-described embodiment, insulating barrier 2 is made up of PE (Poly Ethylene polyethylene) material, and the PE materials can be very
Waterproof action is played well, so as to play Electrical Safety protective effect to the automation equipment being currently running.
In above-described embodiment, layer 7 is drawn in the middle aluminium foil mark that is provided between liner sheath 6 and insulating barrier 2, drawn in aluminium foil mark
Tension nylon wire 8 is filled with layer 7, the anti-interference and stretching resistance effect of the elevator network cable is further improved.
Screen layer 3 in the present embodiment includes naked copper wire mesh braided layer 31 and foil shielding layer 32, and foil shielding layer 32 is wrapped up
The middle periphery by liner sheath 6, naked copper wire mesh braided layer 31 wraps up the periphery of foil shielding layer 32, the braiding of naked copper wire mesh braided layer 31
Density more than 90%, using the double shield structure of naked copper wire mesh braided layer 31 and foil shielding layer 32, can be to elevator network cable
Network transmission signal play anti-jamming effectiveness well.
Embodiments of the invention also include a kind of manufacture method of above-mentioned elevator network cable, and the manufacture method includes following
Step：
A, using multiply thin copper wire and copper foil wire precision process bunchy, conductor 1 is obtained；Waved so as to improve the anti-of conductor 1
Ability.
B, by the good conductor 1 of process by one layer of insulating barrier 2 being made up of PE materials of extrusion molding production line pressing and wrapping
Afterwards, then by obtaining some the root network heart yearns after segmentation.The insulating barrier 2 being made up of PE materials can play good signal and pass
Defeated effect.
C, some the root network heart yearns are matched two-by-two by high-speed pair twister, and according to the lay of technological requirement, point
It is other some to network heart yearn to being twisted into；So that each pair network heart yearn difference transmission signal, produces sympathetic effect, stable signal transmission
Property is good.
D, tension nylon wire 8 is filled between some heart yearns to network by multiple strand cable-former, and intersected and be twisted into again
Beam；The tension nylon wire 8 of filling plays certain drawing-resistant function in the cable.
E, by extrusion molding production line extrude suppress, in all of network heart yearn periphery cladding one layer by PVC
Material and CPE materials mix in by liner sheath 6；Increased the elasticity of the elevator network cable
And flexibility, so as to greatly strengthen using the reversed bending life-span.
F, by high-speed knitter in middle by the peripheral woven shield 3 of liner sheath 6；Improve the anti-interference of the cable
Energy.
G, by extruding compacting on extrusion molding production line, in one layer of the periphery of woven screen layer 3 cladding by PVC material
The oversheath 4 mixed with CPE materials；The elasticity and flexibility of the elevator network cable are further improved, extension uses the longevity
Life.
Two tensile steel wires 5 for playing carrying to network heart yearn are embedded in oversheath 4, it is used for suspension over long distances makes
Occasion.
Further, in step f, screen layer 3 includes foil shielding layer 32 and naked copper wire mesh braided layer 31, high-speed knitter
First knit out during foil shielding layer 32 is coated by the periphery of liner sheath 6, then knit out the cladding aluminum foil screen of naked copper wire mesh braided layer 31
Cover the periphery of layer 32 so that signal transmitted data stabilization, anti-jamming effectiveness is good.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of elevator network cable, including some conductors, insulating barrier, screen layer, oversheath and tensile steel wire, the insulation
The periphery of the layer parcel conductor, the screen layer wraps up the periphery of the insulating barrier, and the oversheath wraps up the screen layer
Periphery, the tensile steel wire is embedded in the oversheath；It is characterized in that：The conductor uses multiply naked copper and copper foil wire
Beam is twisted into through meticulous strand and essence, is provided between the insulating barrier and the screen layer middle by liner sheath, the screen layer bag
Naked copper wire mesh braided layer and foil shielding layer are included, the foil shielding layer wraps up the middle periphery by liner sheath, the naked copper
Net braiding layer wraps up the periphery of the foil shielding layer, and the count of the naked copper wire mesh braided layer is more than 90%；In described
It is made up of the improvement sizing material that PVC material is mixed with CPE materials by liner sheath, the CPE materials are in the improvement sizing material
In mass ratio be arranged on 5%.
2. elevator network cable as claimed in claim 1, it is characterised in that：The oversheath is mixed by PVC material with CPE materials
The improvement sizing material for closing is made.
3. elevator network cable as claimed in claim 1, it is characterised in that：The insulating barrier is made up of PE materials.
4. the elevator network cable as described in claim 1 or 3, it is characterised in that：It is described middle by liner sheath and the insulation
Aluminium foil mark is provided between layer and draws layer.
5. elevator network cable as claimed in claim 4, it is characterised in that：The aluminium foil mark draws and tension nylon is filled with layer
Line.
6. a kind of manufacture method of elevator network cable as claimed in claim 1, it is characterised in that comprise the following steps：
A, using multiply thin copper wire and copper foil wire precision process bunchy, conductor is obtained；
After b, the insulating barrier for being made up the good conductor of process of PE materials of one layer of extrusion molding production line pressing and wrapping, then
By obtaining some the root network heart yearns after segmentation；
C, some the root network heart yearns are matched two-by-two by high-speed pair twister, and according to the lay of technological requirement, it is right respectively
It is twisted into some to network heart yearn；
D, tension nylon wire is filled between some heart yearns to network by multiple strand cable-former, and intersected and be twisted into beam again；
E, extruded by extrusion molding production line and suppressed, in one layer of all of network heart yearn periphery cladding by PVC material and CPE materials
By liner sheath in expecting to mix；
F, by high-speed knitter in it is middle by liner sheath periphery woven shield；
G, by extruding compacting on extrusion molding production line, in one layer of woven screen layer periphery cladding by PVC material and CPE
The oversheath that material is mixed, and it is embedded in two tensile steel wires for playing carrying to network heart yearn in oversheath.
7. the manufacture method of elevator network cable as claimed in claim 6, it is characterised in that in the step f, screen layer
Including naked copper wire mesh braided layer and foil shielding layer, high-speed knitter is first knit out during foil shielding layer is coated by the outer of liner sheath
Enclose, then knit out the periphery that naked copper wire mesh braided layer coats foil shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610027072.4A CN105469851B (en) | 2016-01-14 | 2016-01-14 | Elevator network cable and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610027072.4A CN105469851B (en) | 2016-01-14 | 2016-01-14 | Elevator network cable and its manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105469851A CN105469851A (en) | 2016-04-06 |
| CN105469851B true CN105469851B (en) | 2017-06-30 |
Family
ID=55607466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610027072.4A Active CN105469851B (en) | 2016-01-14 | 2016-01-14 | Elevator network cable and its manufacture method |
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| Country | Link |
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| CN (1) | CN105469851B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808706B (en) * | 2017-09-27 | 2019-08-13 | 广东思柏科技股份有限公司 | A kind of elevator is vertically accompanied cable for digital communication |
| CN107910116A (en) * | 2017-11-22 | 2018-04-13 | 深圳市红旗电工科技有限公司 | The elevator network synthesis line and preparation method of a kind of powered source signal |
| CN108022689B (en) * | 2017-11-30 | 2020-02-21 | 深圳市红旗电工科技有限公司 | Network cable for drag chain system |
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| CN202487281U (en) * | 2012-03-07 | 2012-10-10 | 苏州科宝光电科技有限公司 | Electric cable for 3G data communication |
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|---|---|---|---|---|
| CN101887778B (en) * | 2010-05-05 | 2011-11-23 | 深圳市联嘉祥科技股份有限公司 | Low-smoke flame-retardant pull tension cable special for elevator monitoring |
| CN201804605U (en) * | 2010-09-14 | 2011-04-20 | 上海贝恩科电缆有限公司 | Follower network cable for lift shaft |
| CN103834117A (en) * | 2012-11-20 | 2014-06-04 | 浙江正导电缆有限公司 | Preparation method of modified polyvinyl chloride soft sheath cable material |
| CN102938265B (en) * | 2012-11-21 | 2016-01-27 | 上海贝恩科电缆有限公司 | Explosion-proof elevator cable for fire protection |
| CN104112519A (en) * | 2013-04-20 | 2014-10-22 | 扬州市永诚电器线缆有限公司 | Special-purpose elevator cable |
| CN105244107B (en) * | 2015-10-16 | 2017-10-03 | 安徽蓝德集团股份有限公司 | A kind of shock resistance flame-proof control cable |
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2016
- 2016-01-14 CN CN201610027072.4A patent/CN105469851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2796033Y (en) * | 2005-05-11 | 2006-07-12 | 吴荣裕 | Anti-bending type microphone conductor |
| CN201222363Y (en) * | 2008-04-12 | 2009-04-15 | 吴荣裕 | Novel durable tensile bending-proof type microphone line |
| CN201233742Y (en) * | 2008-06-21 | 2009-05-06 | 吴荣裕 | Novel microphone wire |
| CN201918189U (en) * | 2010-12-31 | 2011-08-03 | 陈榕武 | Microphone cable |
| CN202487281U (en) * | 2012-03-07 | 2012-10-10 | 苏州科宝光电科技有限公司 | Electric cable for 3G data communication |
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| CN105469851A (en) | 2016-04-06 |
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Denomination of invention: Elevator network cables and their manufacturing methods Effective date of registration: 20231225 Granted publication date: 20170630 Pledgee: Shenzhen Rural Commercial Bank Co.,Ltd. Nanshan Sub branch Pledgor: SHENZHEN RED BANNER ELECTRICIAN TECHNOLOGY Co.,Ltd. Registration number: Y2023980074064 |