CN108913977A - A kind of composite material cable slot box - Google Patents
A kind of composite material cable slot box Download PDFInfo
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- CN108913977A CN108913977A CN201810622967.1A CN201810622967A CN108913977A CN 108913977 A CN108913977 A CN 108913977A CN 201810622967 A CN201810622967 A CN 201810622967A CN 108913977 A CN108913977 A CN 108913977A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Organic Insulating Materials (AREA)
- Fireproofing Substances (AREA)
Abstract
The invention discloses a kind of composite material cable slot boxes, are related to cable tray technical field.The composite material cable slot box includes following components by mass percentage：Fe：10-40 parts, C：5-11 parts, Cr：2-4 parts, Mo：6-12 parts, Mn：5-8 parts, Cu：6-13 parts, Ni：2-4 parts, Si：1-3 parts, 8-13 parts of resin, 5-10 parts of fire retardant, 4-9 parts of chlorinating agent, 8-12 parts of perlite, 4-9 parts of glass fibre, 2-4 parts of modifying agent, 2-4 parts of stick, mixed slurry is coated on the surface of substrate, and contains this efficient fire resistant flame retardant object of perlite in the raw material of the mixed slurry, effectively improves the fire resistance of cable tray, magnesium hydroxide is added again as fire retardant, further increases fireproof performance.
Description
Technical field
The present invention relates to cable tray technical fields, more particularly to a kind of composite material cable slot box.
Background technique
Cable is the important carrier of the transmission of substation's electric energy and information transmission, and substation cable is mainly applied in cable duct
If being laid with cover board on cable duct carries out cable protection.Project of transmitting and converting electricity carries out unattended operation transformer station mostly at this stage, for electricity
The hidden danger that cable occurs in fire or operational process is difficult to find in time.Once this, which allows for cable duct cable, occurs fire
When, it is more difficult to control rapidly often involves other circuits.Cable fire is jumped in addition to causing cable bad to may also result in equipment
Lock subtracts for load, even the serious consequences such as damages to firefighter.
Cable tray be in fire prevention system place cable slot box, in present building and factory construction, with
The surge of electricity and the aging of part route, cable overheat spontaneous combustion phenomenon on fire happen occasionally, once cable is on fire, do not exist
At the first time if discovery control, the intensity of a fire can travel to each corner with cable quickly.Another side, cable itself belong to inflammable
Product, the flame that other positions are lighted also is easy to be exposed to outer cable and light, so that fire hazard is caused, so cable tray
The generation of this phenomenon can be effectively prevented.
The working environment of cable tray is complex, unavoidably in high temperature, the deep-etching even working environment of flame,
This requires cable tray have good fire prevention and Corrosion Protection, but existing cable tray all can not meet mostly compared with
High performance requirement.
Summary of the invention
It all can not meet higher fire prevention mostly the technical problem to be solved by the present invention is to existing cable tray and prevent
The performance requirement of corrosion.
In order to solve the above technical problems, the present invention provides a kind of composite material cable slot box, the composite material cable slot
Box includes following components by mass percentage：Fe：10-40 parts, C：5-11 parts, Cr：2-4 parts, Mo：6-12 parts, Mn：5-8 parts,
Cu：6-13 parts, Ni：2-4 parts, Si：1-3 parts, 8-13 parts of resin, 5-10 parts of fire retardant, 4-9 parts of chlorinating agent, 8-12 parts of perlite,
4-9 parts of glass fibre, 2-4 parts of modifying agent, 2-4 parts of stick.
The technical solution that the present invention further limits is：The composite material cable slot box includes following by mass percentage
Component：Fe：25 parts, C：6 parts, Cr：3 parts, Mo：7 parts, Mn：6 parts, Cu：7 parts, Ni：3 parts, Si：2 parts, 9 parts of brominated epoxy resin,
6 parts of fire retardant, 5 parts of chlorinating agent, 9 parts of perlite, 6 parts of glass fibre, 3 parts of modifying agent, 3 parts of stick.
Further, resin is brominated epoxy resin.
The preceding composite material cable slot box, fire retardant is magnesium hydroxide.
The preceding composite material cable slot box, chlorinating agent is thionyl chloride.
The preceding composite material cable slot box, stick are sodium alginate and phosphatic mixture, the sodium alginate
It is 3 with phosphatic ratio:5.
The present invention also provides a kind of preparation methods of composite material cable slot box, include the following steps：
S1：Fe, C, Cr, Mo, Mn, Cu, Ni, Si are added in smelting furnace by weight, the temperature of smelting furnace is adjusted to 1580-
1650 DEG C, melting forms alloy solution afterwards for a period of time, and perlite is then added, and carries out alloy solution and removes Slag treatment；
S2：Will slagging-off treated alloy solution cold water to 850-880 DEG C, be subsequently poured into casting, form substrate；
S3：Resin, fire retardant, chlorinating agent, modifying agent, glass fibre, stick are prepared into mixing by melting blended under agitation method
Slurry；
S4：Substrate is placed in cable tray mold, coats the mixed slurry that one layer of S3 is obtained on each surface of substrate, then
Extrusion forming；
S5：The gantry of extrusion forming is placed in heating furnace and is heating and curing；
S6：Quality inspection is carried out to the cable tray that is cured, using being inside ultrasonic flaw detection instrument detection cable gantry
No to have slight crack, examining flawless is qualified product, is polished qualified product, cleans, obtains composite material cable slot box.
The beneficial effects of the invention are as follows：
(1) in the present invention, silicon is added in the feed as reducing agent and antioxidant, the bullet of cable tray material can be significantly improved
The property limit；Mo and Mn is added in raw material, distortion of lattice is caused in melting, distortion of lattice increases the resistance of dislocation motion, makes
Sliding is difficult to carry out, so that the intensity of Alloy solid solution and hardness be made all to dramatically increase；
(2) in the present invention, mixed slurry is coated on the surface of substrate, and contains this height of perlite in the raw material of the mixed slurry
Fire resistant flame retardant object is imitated, the fire resistance of cable tray is effectively improved, and magnesium hydroxide is added as fire retardant, is further mentioned
High fireproof performance；Mixed slurry uses brominated epoxy resin for main material, and butyronitrile hydroxyl polyurethane is added as modifying agent,
Further increase the resistance to corrosion of brominated epoxy resin, to improve the resistance to corrosion of cable tray；
(3) in the present invention, and stick is added, and stick presses 10 by sodium alginate, starch, phosphate:3:5 match, and have
It is bonding with substrate more stable to make mixed slurry, and cable tray is put into heating furnace and carries out thermosetting for good cementability,
Further increase mixed slurry with the bonding stability of substrate.
Specific embodiment
Embodiment 1：A kind of composite material cable slot box provided in this embodiment, composite material cable slot box press quality percentage
It include following components than meter：Fe：40 parts, C：5 parts, Cr：2 parts, Mo：6 parts, Mn：5 parts, Cu：6 parts, Ni：2 parts, Si：1 part, bromination
8 parts of epoxy resin, 5 parts of magnesium hydroxide, 4 parts of thionyl chloride, 8 parts of perlite, 4 parts of glass fibre, 2 parts of modifying agent, sodium alginate
With 2 parts of phosphatic mixture, wherein sodium alginate and phosphatic ratio are 3:5.
The preparation method of composite material cable slot box provided in this embodiment, includes the following steps：
S1：Fe, C, Cr, Mo, Mn, Cu, Ni, Si are added in smelting furnace by weight, the temperature of smelting furnace is adjusted to 1580-
1650 DEG C, melting forms alloy solution afterwards for a period of time, and perlite is then added, and carries out alloy solution and removes Slag treatment；
S2：Will slagging-off treated alloy solution cold water to 850 DEG C, be subsequently poured into casting, form substrate；
S3：Resin, fire retardant, chlorinating agent, modifying agent, glass fibre, stick are prepared into mixing by melting blended under agitation method
Slurry；
S4：Substrate is placed in cable tray mold, coats the mixed slurry that one layer of S3 is obtained on each surface of substrate, then
Extrusion forming；
S5：The gantry of extrusion forming is placed in heating furnace and is heating and curing；
S6：Quality inspection is carried out to the cable tray that is cured, using being inside ultrasonic flaw detection instrument detection cable gantry
No to have slight crack, examining flawless is qualified product, is polished qualified product, cleans, obtains composite material cable slot box.
Embodiment 2：A kind of composite material cable slot box provided in this embodiment, composite material cable slot box press quality percentage
It include following components than meter：Fe：25 parts, C：6 parts, Cr：3 parts, Mo：7 parts, Mn：6 parts, Cu：7 parts, Ni：3 parts, Si：2 parts, bromination
9 parts of epoxy resin, 6 parts of magnesium hydroxide, 5 parts of thionyl chloride, 9 parts of perlite, 6 parts of glass fibre, 3 parts of modifying agent, sodium alginate
With 3 parts of phosphatic mixture, wherein sodium alginate and phosphatic ratio are 3:5.
The preparation method of composite material cable slot box provided in this embodiment, includes the following steps：
S1：Fe, C, Cr, Mo, Mn, Cu, Ni, Si are added in smelting furnace by weight, the temperature of smelting furnace is adjusted to 1580-
1650 DEG C, melting forms alloy solution afterwards for a period of time, and perlite is then added, and carries out alloy solution and removes Slag treatment；
S2：Will slagging-off treated alloy solution cold water to 865 DEG C, be subsequently poured into casting, form substrate；
S3：Resin, fire retardant, chlorinating agent, modifying agent, glass fibre, stick are prepared into mixing by melting blended under agitation method
Slurry；
S4：Substrate is placed in cable tray mold, coats the mixed slurry that one layer of S3 is obtained on each surface of substrate, then
Extrusion forming；
S5：The gantry of extrusion forming is placed in heating furnace and is heating and curing；
S6：Quality inspection is carried out to the cable tray that is cured, using being inside ultrasonic flaw detection instrument detection cable gantry
No to have slight crack, examining flawless is qualified product, is polished qualified product, cleans, obtains composite material cable slot box.
Embodiment 3：A kind of composite material cable slot box provided in this embodiment, composite material cable slot box press quality percentage
It include following components than meter：Fe：10 parts, C：7 parts, Cr：4 parts, Mo：8 parts, Mn：7 parts, Cu：8 parts, Ni：4 parts, Si：3 parts, bromination
10 parts of epoxy resin, 7 parts of magnesium hydroxide, 6 parts of thionyl chloride, 10 parts of perlite, 8 parts of glass fibre, 4 parts of modifying agent, alginic acid
4 parts of sodium and phosphatic mixture, wherein sodium alginate and phosphatic ratio are 3:5.
The preparation method of composite material cable slot box provided in this embodiment, includes the following steps：
S1：Fe, C, Cr, Mo, Mn, Cu, Ni, Si are added in smelting furnace by weight, the temperature of smelting furnace is adjusted to 1580-
1650 DEG C, melting forms alloy solution afterwards for a period of time, and perlite is then added, and carries out alloy solution and removes Slag treatment；
S2：Will slagging-off treated alloy solution cold water to 880 DEG C, be subsequently poured into casting, form substrate；
S3：Resin, fire retardant, chlorinating agent, modifying agent, glass fibre, stick are prepared into mixing by melting blended under agitation method
Slurry；
S4：Substrate is placed in cable tray mold, coats the mixed slurry that one layer of S3 is obtained on each surface of substrate, then
Extrusion forming；
S5：The gantry of extrusion forming is placed in heating furnace and is heating and curing；
S6：Quality inspection is carried out to the cable tray that is cured, using being inside ultrasonic flaw detection instrument detection cable gantry
No to have slight crack, examining flawless is qualified product, is polished qualified product, cleans, obtains composite material cable slot box.
1~embodiment of embodiment 3 and commercially available cable tray are subjected to performance comparison test, properties are surveyed by national standard
Fixed, experimental condition and other experimental materials are all the same, and test result is as shown in table 1：
Table 1
As can be seen from Table 1, cable testing bridge prepared by the present invention, hardness and tensile strength are above comparative example, year corrosion depth
Lower than comparative example, oxygen index (OI), refractoriness and fire endurance are above comparative example, it can thus be seen that cable produced by the invention
Gantry, not only mechanical performance be better than commercially available cable testing bridge, and fireproof performance and Corrosion Protection be also superior to it is commercially available
Cable testing bridge.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (7)
1. a kind of composite material cable slot box, it is characterised in that：The composite material cable slot box include by mass percentage with
Lower component：Fe：10-40 parts, C：5-11 parts, Cr：2-4 parts, Mo：6-12 parts, Mn：5-8 parts, Cu：6-13 parts, Ni：2-4 parts, Si：
1-3 parts, 8-13 parts of resin, 5-10 parts of fire retardant, 4-9 parts of chlorinating agent, 8-12 parts of perlite, 4-9 parts of glass fibre, modifying agent 2-
4 parts, 2-4 parts of stick.
2. a kind of composite material cable slot box according to claim 1, it is characterised in that：The described composite material cable slot
Box includes following components by mass percentage：Fe：25 parts, C：6 parts, Cr：3 parts, Mo：7 parts, Mn：6 parts, Cu：7 parts, Ni：3
Part, Si：2 parts, 9 parts of brominated epoxy resin, 6 parts of fire retardant, 5 parts of chlorinating agent, 9 parts of perlite, 6 parts of glass fibre, modifying agent 3
Part, 3 parts of stick.
3. a kind of composite material cable slot box according to claim 1 or 2, it is characterised in that：The resin is brominated
Oxygen resin.
4. a kind of composite material cable slot box according to claim 1 or 2, it is characterised in that：The fire retardant is hydrogen-oxygen
Change magnesium.
5. a kind of composite material cable slot box according to claim 1 or 2, it is characterised in that：The chlorinating agent is chlorination
Sulfoxide.
6. a kind of composite material cable slot box according to claim 1 or 2, it is characterised in that：The stick is alginic acid
Sodium and phosphatic mixture, the sodium alginate and phosphatic ratio are 3:5.
7. a kind of preparation method of the composite material cable slot box as described in claim 1-6 is any, it is characterised in that：Including with
Lower step：
S1：Fe, C, Cr, Mo, Mn, Cu, Ni, Si are added in smelting furnace by weight, the temperature of smelting furnace is adjusted to 1580-
1650 DEG C, melting forms alloy solution afterwards for a period of time, and perlite is then added, and carries out alloy solution and removes Slag treatment；
S2：Will slagging-off treated alloy solution cold water to 850-880 DEG C, be subsequently poured into casting, form substrate；
S3：Resin, fire retardant, chlorinating agent, modifying agent, glass fibre, stick are prepared into mixing by melting blended under agitation method
Slurry；
S4：Substrate is placed in cable tray mold, coats the mixed slurry that one layer of S3 is obtained on each surface of substrate, then
Extrusion forming；
S5：The gantry of extrusion forming is placed in heating furnace and is heating and curing；
S6：Quality inspection is carried out to the cable tray that is cured, using being inside ultrasonic flaw detection instrument detection cable gantry
No to have slight crack, examining flawless is qualified product, is polished qualified product, cleans, obtains composite material cable slot box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810622967.1A CN108913977A (en) | 2018-06-15 | 2018-06-15 | A kind of composite material cable slot box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810622967.1A CN108913977A (en) | 2018-06-15 | 2018-06-15 | A kind of composite material cable slot box |
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| Publication Number | Publication Date |
|---|---|
| CN108913977A true CN108913977A (en) | 2018-11-30 |
Family
ID=64420625
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810622967.1A Pending CN108913977A (en) | 2018-06-15 | 2018-06-15 | A kind of composite material cable slot box |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256248A (en) * | 2015-11-12 | 2016-01-20 | 江苏宇恒电气有限公司 | Steel plate special for cable bridge and thermal treatment method for steel plate |
| CN107565474A (en) * | 2017-10-29 | 2018-01-09 | 江苏鼎荣电气集团有限公司 | A kind of composite electric cable bridge and its production technology |
| CN107904482A (en) * | 2017-10-29 | 2018-04-13 | 江苏鼎荣电气集团有限公司 | A kind of retarding corrosion-resisting cable bridge frame and preparation method thereof |
-
2018
- 2018-06-15 CN CN201810622967.1A patent/CN108913977A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256248A (en) * | 2015-11-12 | 2016-01-20 | 江苏宇恒电气有限公司 | Steel plate special for cable bridge and thermal treatment method for steel plate |
| CN107565474A (en) * | 2017-10-29 | 2018-01-09 | 江苏鼎荣电气集团有限公司 | A kind of composite electric cable bridge and its production technology |
| CN107904482A (en) * | 2017-10-29 | 2018-04-13 | 江苏鼎荣电气集团有限公司 | A kind of retarding corrosion-resisting cable bridge frame and preparation method thereof |
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Application publication date: 20181130 |