CN117831844A - Oxygen-isolation layer high-flame-retardance control cable - Google Patents

Oxygen-isolation layer high-flame-retardance control cable Download PDF

Info

Publication number
CN117831844A
CN117831844A CN202311747440.9A CN202311747440A CN117831844A CN 117831844 A CN117831844 A CN 117831844A CN 202311747440 A CN202311747440 A CN 202311747440A CN 117831844 A CN117831844 A CN 117831844A
Authority
CN
China
Prior art keywords
layer
insulating layer
flame
cavity
stirring
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
Application number
CN202311747440.9A
Other languages
Chinese (zh)
Inventor
於广勇
杨金花
李正宝
吴海燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Hui Ning Electrical Instrument Group Co ltd
Original Assignee
Anhui Hui Ning Electrical Instrument Group Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui Hui Ning Electrical Instrument Group Co ltd filed Critical Anhui Hui Ning Electrical Instrument Group Co ltd
Priority to CN202311747440.9A priority Critical patent/CN117831844A/en
Publication of CN117831844A publication Critical patent/CN117831844A/en
Pending legal-status Critical Current

Links

Abstract

The utility model discloses a high-flame-retardance control cable with an oxygen-isolation layer, which relates to the technical field of cables and comprises a plurality of wire cores, wherein shielding layers are wrapped outside each wire core, all the wire cores wrap the outside of a composite sheath, the composite sheath comprises an insulating layer, a heat insulating layer, a flame-retardance layer and an anti-corrosion layer, the insulating layer is positioned on the inner side of the composite sheath, the anti-corrosion layer is positioned on the outer side of the sheath, the heat insulating layer and the flame-retardance layer are positioned between the insulating layer and the anti-corrosion layer, the heat insulating layer is arranged on one side close to the insulating layer, and the flame-retardance layer is arranged on one side close to the anti-corrosion layer; a filling cavity is arranged between the shielding layer and the inner wall of the composite sheath, a cavity is formed in the flame-retardant layer, and a rat and termite preventing agent is filled in the cavity; through set up the cavity in fire-retardant layer to pack the protection against rodents ant agent in the cavity, make the compound sheath not only have fire-retardant, thermal-insulated, anticorrosive and insulating effect, can also prevent that the rodents ant from continuously causing the damage to the cable surface.

Description

Oxygen-isolation layer high-flame-retardance control cable
Technical Field
The utility model relates to the technical field of cables, in particular to a high-flame-retardance control cable with an oxygen barrier layer.
Background
Control cables generally refer to cables for connecting control devices and controlled devices. These cables are commonly used to transmit control signals and power supplies; the control cable typically comprises a multi-core cable having a plurality of insulated conductors, each conductor for transmitting a different signal or power source.
The utility model discloses a flame-retardant fire-resistant control cable in the prior art, such as a Chinese patent with publication number of CN220065236U, which comprises a cable sheath, the inner wall fixedly connected with flame retardant layer of cable sheath, the inner wall fixedly connected with enhancement layer of flame retardant layer, the inner wall fixedly connected with high temperature resistant layer of enhancement layer, the inner wall fixedly connected with wear-resistant inlayer of high temperature resistant layer, the inside of wear-resistant inlayer is equipped with the filling layer, the inside of filling layer is equipped with the parcel layer, the inside of parcel layer is equipped with the cable core, the cable sheath adopts wear-resistant chromeplate rubber crust, the material of wear-resistant inlayer is carborundum wearing layer.
However, the above cable has the following disadvantages in use: when the cable is erected in a tunnel or a cable trench, the cable is easily bitten by rats and ants, and the biting of the rats and the ants can cause water inflow of the cable, so that a series of problems are caused; therefore, the utility model provides the oxygen-barrier high-flame-retardance control cable.
Disclosure of Invention
The technical problems solved by the utility model are as follows: the existing control cable is poor in rat and termite resistance, when the cable is erected in a tunnel or a cable trench, the cable is easy to bite by rats and termites, and the rats and termites bite to cause water inflow of the cable, so that a series of problems are caused.
The utility model can be realized by the following technical scheme: the high-flame-retardant control cable comprises a plurality of wire cores, wherein shielding layers are wrapped outside each wire core, all the wire cores wrap the outside of a composite sheath, the composite sheath comprises an insulating layer, a heat insulating layer, a flame-retardant layer and an anti-corrosion layer, the insulating layer is positioned on the inner side of the composite sheath, the anti-corrosion layer is positioned on the outer side of the sheath, the heat insulating layer and the flame-retardant layer are positioned between the insulating layer and the anti-corrosion layer, the heat insulating layer is arranged on one side close to the insulating layer, and the flame-retardant layer is arranged on one side close to the anti-corrosion layer; a filling cavity is arranged between the shielding layer and the inner wall of the composite sheath, and water-resistant flame-retardant inorganic filler is filled in the filling cavity; the flame-retardant layer is internally provided with a cavity, and the cavity is filled with a rat and termite preventing agent.
The utility model further technically improves that: the rat and termite preventing agent comprises the following components:
the utility model further technically improves that: the preparation method of the rat and termite preventing agent comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, and stirring at room temperature for reaction for 1h to obtain a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, and stirring at room temperature for reacting for 1h to obtain a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reacting for 1h to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ to obtain the rat and termite preventing agent.
The utility model further technically improves that: in the first step, the second step and the third step, the stirring speed is 100r/min.
The utility model further technically improves that: the compatilizer is maleic anhydride grafting.
The utility model further technically improves that: and a self-repairing sealant is arranged on one side of the inner wall of the cavity, which is close to the anti-corrosion layer.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the cavity is formed in the flame retardant layer, and the cavity is filled with the rat and termite preventing agent, so that the composite sheath has the functions of flame retardance, heat insulation, corrosion prevention and insulation, and can prevent the rat and termite from continuously damaging the cable surface by matching with the functions of the insulating layer, the heat insulation layer, the flame retardant layer and the corrosion prevention layer.
2. In the utility model, borax is added into the rat and termite preventing agent, and can be used for killing insects, and the borax is not inflammable and is not easy to burn at high temperature, so that the borax can be used as a flame retardant; by adding ammonium polyphosphate into the rat and termite preventing agent, the ammonium polyphosphate has good flame retardant property and chemical stability, and can release ammonia and phosphorus monoxide when being burnt, so that the ammonium polyphosphate has a repelling effect on rats and termites.
Drawings
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a schematic cross-sectional view of a cable according to the present utility model;
fig. 2 is a schematic cross-sectional structure of a flame retardant layer according to the present utility model.
In the figure: 1. a wire core; 2. an insulating layer; 3. a thermal insulation layer; 4. a flame retardant layer; 5. an anti-corrosion layer; 6. filling the cavity; 7. a cavity.
Detailed Description
In order to further describe the technical means and effects adopted by the utility model for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the utility model with reference to the attached drawings and the preferred embodiment.
Referring to fig. 1-2, an oxygen barrier high flame retardant control cable comprises a plurality of wire cores 1, wherein a shielding layer is wrapped outside each wire core 1, the shielding layer is made of tin-plated copper wires by braiding, and the tin-plated copper is mainly composed of a copper base material, a tin coating and an oxide, has excellent conductivity and mechanical strength, and is widely applied to the field of electromagnetic wave shielding; the tin-plated copper realizes shielding mainly by absorbing and reflecting electromagnetic waves, the shielding efficiency is also influenced by the placement environment and the shape, and the tin-plated copper has excellent shielding effect especially in high-frequency occasions; meanwhile, due to the existence of the tin coating, the tinned copper has better resistance to strong acid and alkali environments such as oxidation, corrosion and the like;
all the wire cores 1 are wrapped outside a composite sheath, the composite sheath is used for protecting the wire cores 1, the composite sheath comprises an insulating layer 2, a heat insulating layer 3, a flame retardant layer 4 and an anti-corrosion layer 5, the insulating layer 2 is positioned at the inner side of the composite sheath, the anti-corrosion layer 5 is positioned at the outer side of the sheath, the heat insulating layer 3 and the flame retardant layer 4 are positioned between the insulating layer 2 and the anti-corrosion layer 5, the heat insulating layer 3 is arranged at one side close to the insulating layer 2, and the flame retardant layer 4 is arranged at one side close to the anti-corrosion layer 5; a filling cavity 6 is arranged between the shielding layer and the inner wall of the composite sheath, and a water-resistant flame-releasing inorganic filler is filled in the filling cavity 6; a cavity 7 is formed in the flame-retardant layer 4, and a rat and termite preventing agent is filled in the cavity 7; the cavity 7 is arranged in the flame-retardant layer 4, and the cavity 7 is filled with the rat and termite preventing agent, so that the composite sheath has the functions of flame retardance, heat insulation, corrosion resistance and insulation, and can prevent the rat and termite from continuously damaging the surface of the cable;
wherein the material of the insulating layer 2 is soft polyvinyl chloride, the soft polyvinyl chloride contains more plasticizer, the softness, the elongation at break and the cold resistance of the soft polyvinyl chloride are improved, the texture is soft, and the air tightness and the water impermeability are good. Although the electrical insulation is reduced due to the addition of the plasticizer, very high electrical insulation is maintained;
the heat insulation layer 3 is made of glass wool, which is a fiber product prepared by taking glass fiber as a raw material, adding a proper amount of resin glue, and then melting at high temperature; the glass wool has the characteristics of fire resistance, heat insulation, sound absorption, chemical stability, no toxicity, excellent softness and the like;
the flame-retardant layer 4 is prepared by carrying out melt blending, extrusion granulation and complete processing on polyolefin and expandable graphite loaded layered double hydroxide; specifically comprises the steps of expanding graphite, fe (NO) 3 ) 3 ·9H 2 O and Mg (NO) 3 )·6H 2 Mixing O with deionized water, adjusting pH to 10, reacting at 2000 deg.C for 15 hr, and coolingCentrifuging and drying to obtain the expandable graphite supported layered double hydroxide;
the anticorrosive layer 5 is mainly made of rubber material, and is coated with anticorrosive paint, also called anticorrosive paint, which is a coating material and is characterized by water resistance, corrosion resistance, fire resistance and electrical insulation. The common anti-corrosion paint is acrylic anti-corrosion paint, epoxy anti-corrosion paint and the like.
When a rat bites the surface of the composite sheath, the rat and termite preventing agent in the cavity 7 flows out, and in order to solve the problem, a self-repairing sealant is arranged on one side, close to the anticorrosive layer 5, of the inner wall of the cavity 7; when the spike is inserted into the cavity 7 and pulled out again, the hole at the damaged position is repaired under the action of the self-repairing composite adhesive, so that the rat and termite preventing agent is prevented from flowing out from the damaged position;
in the application, the rat and termite preventing agent comprises the following components:
the preparation method of the rat and termite preventing agent comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, and stirring at room temperature for reaction for 1h to obtain a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, and stirring at room temperature for reacting for 1h to obtain a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reacting for 1h to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ to obtain the rat and termite preventing agent.
The utility model further technically improves that: in the first step, the second step and the third step, the stirring speed is 100r/min.
The compatilizer is maleic anhydride grafting.
Selecting a rat and termite preventing agent with corresponding components, preparing the rat and termite preventing agent by the preparation method, and then performing corresponding tests;
example 1
The components of the rat and termite preventing agent are as follows: 20 parts of deionized water; 15 parts of borax; 5 parts of silicon dioxide powder; 10 parts of ammonium polyphosphate; 10 parts of aluminum hydroxide magnesium phosphate; 10 parts of dimethyl sulfoxide; 10 parts of compatilizer; the preparation method comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, so as to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ at the stirring speed of 100r/min to obtain the rat and termite preventing agent.
Example two
The components of the rat and termite preventing agent are as follows: 25 parts of deionized water; 17 parts of borax; 8 parts of silicon dioxide powder; 15 parts of ammonium polyphosphate; 15 parts of aluminum hydroxide magnesium phosphate; 15 parts of dimethyl sulfoxide; 15 parts of a compatilizer; the preparation method comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, so as to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ at the stirring speed of 100r/min to obtain the rat and termite preventing agent.
Example III
The components of the rat and termite preventing agent are as follows: 30 parts of deionized water; 20 parts of borax; 10 parts of silicon dioxide powder; 20 parts of ammonium polyphosphate; 20 parts of aluminum hydroxide magnesium phosphate; 20 parts of dimethyl sulfoxide; 20 parts of a compatilizer; the preparation method comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, so as to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ at the stirring speed of 100r/min to obtain the rat and termite preventing agent.
Comparative example one
The components of the rat and termite preventing agent are as follows: 20 parts of deionized water; 5 parts of silicon dioxide powder; 10 parts of ammonium polyphosphate; 10 parts of aluminum hydroxide magnesium phosphate; 10 parts of dimethyl sulfoxide; 10 parts of compatilizer; the preparation method comprises the following steps:
adding ammonium polyphosphate and deionized water into a container A, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, so as to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ at the stirring speed of 100r/min to obtain the rat and termite preventing agent.
Comparative example two
The components of the rat and termite preventing agent are as follows: 25 parts of deionized water; 17 parts of borax; 8 parts of silicon dioxide powder; 15 parts of aluminum hydroxide magnesium phosphate; 15 parts of dimethyl sulfoxide; 15 parts of a compatilizer; the preparation method comprises the following steps:
adding borax and deionized water into a container A, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, so as to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ at the stirring speed of 100r/min to obtain the rat and termite preventing agent.
Comparative example three
The components of the rat and termite preventing agent are as follows: 30 parts of deionized water; 20 parts of borax; 20 parts of ammonium polyphosphate; 20 parts of aluminum hydroxide magnesium phosphate; 20 parts of dimethyl sulfoxide; 20 parts of a compatilizer; the preparation method comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, and obtaining a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reaction for 1h, wherein the stirring speed is 100r/min, so as to obtain a third intermediate;
and thirdly, placing the third intermediate in a condition of 35 ℃ for stirring reaction for 2 hours, wherein the stirring speed is 100r/min, and the rat and termite preventing agent is obtained.
According to GB2951.38-86, performing an ant-proof performance test, and according to the standard GB/T34016-2017, performing a mouse-proof performance test; flame retardant performance tests were carried out according to test standard GB/T8626, and the test results are shown in Table 1:
TABLE 1
From the above, the oxygen-isolation layer high-flame-retardance control cable has a good flame-retardance effect and an excellent rat and termite prevention effect.
The present utility model is not limited to the above embodiments, but is capable of modification and variation in all aspects, including those of ordinary skill in the art, without departing from the spirit and scope of the present utility model.

Claims (6)

1. The utility model provides a high fire-retardant control cable in oxygen barrier layer which characterized in that: the cable comprises a plurality of cable cores (1), wherein shielding layers are wrapped outside each cable core (1), all the cable cores (1) wrap the outside of a composite sheath, the composite sheath comprises an insulating layer (2), a heat insulating layer (3), a flame retardant layer (4) and an anti-corrosion layer (5), the insulating layer (2) is positioned on the inner side of the composite sheath, the anti-corrosion layer (5) is positioned on the outer side of the sheath, the heat insulating layer (3) and the flame retardant layer (4) are positioned between the insulating layer (2) and the anti-corrosion layer (5), the heat insulating layer (3) is arranged on one side close to the insulating layer (2), and the flame retardant layer (4) is arranged on one side close to the anti-corrosion layer (5); a filling cavity (6) is arranged between the shielding layer and the inner wall of the composite sheath, and the filling cavity (6) is filled with water-fire-resistant inorganic filler; a cavity (7) is formed in the flame-retardant layer (4), and a rat and termite preventing agent is filled in the cavity (7).
2. The oxygen barrier high flame retardant control cable of claim 1, wherein the rodenticide comprises the following components:
3. the oxygen barrier high flame retardant control cable according to claim 2, wherein the preparation method of the rat and termite preventing agent comprises the following steps:
adding borax, ammonium polyphosphate and deionized water into a container A, and stirring at room temperature for reaction for 1h to obtain a first intermediate; adding aluminum hydroxide ammonium phosphate and dimethyl sulfoxide into a container B, and stirring at room temperature for reacting for 1h to obtain a second intermediate;
step two, adding the first intermediate and the second intermediate into a C container, adding a compatilizer, and stirring at room temperature for reacting for 1h to obtain a third intermediate;
and thirdly, adding the silicon dioxide powder into a third intermediate, and stirring and reacting for 2 hours at 35 ℃ to obtain the rat and termite preventing agent.
4. The oxygen barrier high flame retardant control cable of claim 3, wherein in step one, step two and step three, the stirring speed is 100r/min.
5. An oxygen barrier high flame retardant control cable according to claim 2, wherein the compatibilizer is maleic anhydride grafted.
6. The oxygen barrier high-flame-retardance control cable according to claim 1, wherein self-repairing sealant is arranged on one side, close to the anticorrosive layer (5), of the inner wall of the cavity (7).
CN202311747440.9A 2023-12-18 2023-12-18 Oxygen-isolation layer high-flame-retardance control cable Pending CN117831844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311747440.9A CN117831844A (en) 2023-12-18 2023-12-18 Oxygen-isolation layer high-flame-retardance control cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311747440.9A CN117831844A (en) 2023-12-18 2023-12-18 Oxygen-isolation layer high-flame-retardance control cable

Publications (1)

Publication Number Publication Date
CN117831844A true CN117831844A (en) 2024-04-05

Family

ID=90514702

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311747440.9A Pending CN117831844A (en) 2023-12-18 2023-12-18 Oxygen-isolation layer high-flame-retardance control cable

Country Status (1)

Country Link
CN (1) CN117831844A (en)

Similar Documents

Publication Publication Date Title
US4549041A (en) Flame-retardant cross-linked composition and flame-retardant cable using same
CN102842376B (en) High-temperature fire-resistant insulated cable for ships and warships
CN103601954A (en) Flame-retardant ceramic composite material and preparation method thereof
CN103554919A (en) Flame-retardant ceramic silicone rubber and preparation method thereof
CN110335711A (en) A kind of naval vessel termite-resistant rodent-resistant low-smoke non-halogen flame-retardant control cable
CN105931718A (en) High-reliability flexible mineral insulated cable
CN117831844A (en) Oxygen-isolation layer high-flame-retardance control cable
CN112908545A (en) High-strength flexible fireproof and fire-resistant cable and manufacturing method thereof
CN112435782A (en) Polyvinyl chloride insulation nylon sheath cable
CN114242307B (en) Waterproof, fireproof and rat-proof composite cable
CN214897764U (en) High-strength flexible fireproof and fire-resistant cable
CN108648868B (en) Fiber reinforced fireproof cable
CN107103952A (en) A kind of insulated flame-resistant cable of silicon-carbon doping and preparation method thereof
CN105913943A (en) Special cable for railway traffic
CN111524652A (en) Ethylene propylene rubber insulation rat-proof ant-proof low-smoke halogen-free flame-retardant power cable for ships
CN215527294U (en) Environment-friendly sheathed cable
CN216817937U (en) Environment-friendly termite-proof laid power cable
CN217280069U (en) Small cross-section control line
JP2001002840A (en) Non-halogen flame-retarded resin composition, and inclusion and flame-retarded wire and cable using the same
CN212847815U (en) Polyvinyl chloride protective sleeve for electrical aluminum alloy conductor cable
CN217544220U (en) Fireproof and waterproof medium-voltage cable
CN215377009U (en) Armored cable
CN218647678U (en) Flexible mineral insulation copper corrugated metal sheath fireproof cable
CN212136054U (en) Intelligent building house-entering integrated cable
CN210349430U (en) Network cable with flame retardant capability

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination