CN111302759A - Preparation method of cable flame-retardant pipeline - Google Patents
Preparation method of cable flame-retardant pipeline Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
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- C04B2111/20—Resistance against chemical, physical or biological attack
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
A preparation method of a cable flame-retardant pipeline is characterized by comprising the following steps: the cable flame-retardant pipeline is prepared by taking 100 parts by weight of magnesium oxide, 55-60 parts by weight of magnesium sulfate and 60-65 parts by weight of water as reaction raw materials, 0.8-1.6 parts by weight of citric acid monohydrate, 0.5-1 part by weight of sodium citrate and 0.5-2.8 parts by weight of calcium stearate as modification aids, 5-10 parts by weight of bentonite, 12-28 parts by weight of fly ash and 18-28 parts by weight of talcum powder as filling materials, winding the formed slurry on a core mold together with low-alkali glass fiber gray fabric and non-woven fabric, and curing to prepare the cable flame-retardant pipeline. The cable flame-retardant pipeline prepared by the invention comprises the following components: the formaldehyde emission is as low as 0.1ml/L, reaching E0 level; the mechanical strength is high, and the breaking strength reaches 4; the bearing capacity can reach 13000KN when the pressure is more than 5 MPa; the fireproof performance reaches A1 level, deformation does not occur at the flame temperature of 1400 ℃, the material does not melt at the temperature of 2800 ℃, and the fire resistance limit can reach 4 hours.
Description
Technical Field
The invention relates to the technical field of power cables and channel materials, in particular to a preparation method of a cable flame-retardant pipeline.
Background
With the rapid development of Chinese national economy, China cabling popularization projects are distributed in each city, more and more cabling projects concentrate cables into cable trenches or cable wells, however, with the popularization of power cabling projects, the cable accident rate is increased, and a large number of facts prove that most cable accidents are related to cable accessories. Due to the quality and the installation process, once an accident happens to the cable, other cables which are arranged in the same ditch side by side are damaged, and a cable fire disaster can be caused seriously, so that the irreparable loss is caused to the whole power system.
High-voltage cables such as power grid systems, tunnels, channels and the like are generally provided with a layer of cable protection pipe on the outer layer of the cable, the existing cable protection pipes can be divided into steel pipes, cast iron pipes, clay-mixed pipes, plastic pipes and the like from the material quality, wherein the steel pipes, the cast iron pipes, the clay pipes and the clay-mixed pipes have the problems of poor corrosion resistance, short service life, poor impermeability and the like, the plastic pipes are more generally applied due to good insulation property and low price, but the plastic pipes are easy to age, the mechanical strength in use is not enough, the service life is short, the oxygen index of polyethylene, polyvinyl chloride and other materials is low, the flame retardant property is low in the use process, and the combustion is easy to occur to cause fire.
Disclosure of Invention
The invention aims to provide a preparation method of a cable flame-retardant pipeline. The method effectively improves the flame retardance, corrosion resistance and waterproof performance of the cable flame-retardant pipeline.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a cable flame-retardant pipeline is characterized by comprising the following steps: the cable flame-retardant pipeline is characterized in that 100 parts of magnesium oxide, 55-60 parts of magnesium sulfate and 60-65 parts of water are used as reaction raw materials, 0.8-1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate, 1-2 parts of organic silicon and 0.5-2.8 parts of calcium stearate are used as modification aids, 5-10 parts of bentonite, 12-28 parts of fly ash and 18-28 parts of talcum powder are used as filling materials to prepare colloidal slurry, a non-woven fabric is soaked in the colloidal slurry and then spirally and continuously wound on the surface of a tubular core mold, a low-alkali glass fiber gray fabric soaked with the colloidal slurry is sequentially wound on the core mold wound with the non-woven fabric, finally the non-woven fabric soaked with the colloidal slurry is wound on the outermost surface, the layer ratio of the sequentially wound non-woven fabric, the low-alkali glass fiber gray fabric and the non-woven fabric is 1:8-14:1, and then the non-woven fabric, Curing for 7-12 hours under the condition of 80-90% humidity, demoulding, and curing for 36 hours under the conditions of 30-40 ℃ and 60-70% humidity, wherein the talcum powder is a mixture consisting of 5.5-6 mu m talcum powder A and 9-10 mu m talcum powder B, and the mass ratio of the talcum powder A: and talcum powder B is 2: 1-1.5.
In the preparation process, light weight and large bearing capacity are pursued in the field, but the bearing capacity is relatively reduced when the light weight is ensured, and the weight is relatively increased when the high bearing capacity is ensured; the low-alkali glass fiber grey cloth and the non-woven fabric are used, so that the insulativity and the heat insulation of the flame-retardant pipeline are improved, and the stability of the material is ensured as a first defense line for preventing overheating combustion. By combining the formula with multilayer winding forming, the light weight is ensured, the tension between layers is reduced, the equal-strength structure of the product in all directions is realized, the strength of the material is enhanced, the bearing capacity of the material is improved, the volume change of the flame-retardant pipe is reduced, and the demolding is facilitated.
Furthermore, the mixture of the talcum powder A with the particle size D of 5.5 μm and the talcum powder B with the particle size of 10 μm, which have different thicknesses, comprises the following components in percentage by mass: and talcum powder B is 2:1.
The talcum powder is added into the system as a filler, plays a role of a framework and can improve the flame retardance of the material. However, the talcum powder has a special rhombic lamellar structure, which directly affects the density of the material, and larger gaps are formed among particles due to the accumulation of the talcum powder, so that the density of the material is reduced, and the corrosion resistance and the deformation resistance of the material are affected. The invention adopts the talcum powder with different thickness degrees as the filling material, realizes secondary filling, increases the material density, thereby reducing the shrinkage rate of the prepared material, simultaneously reduces the hydration heat, prevents high-temperature deformation and ensures the dimensional stability.
Further, the slurry is prepared by adding magnesium sulfate into water to prepare a solution, then sequentially adding magnesium oxide and calcium stearate, stirring for 15-20min at a stirring speed of 80-100r/min, and then adding bentonite, fly ash, talcum powder, citric acid monohydrate, citric acid and sodium organic silicon, stirring to prepare the slurry, wherein the stirring speed is 100-120r/min, and the stirring time is 10-15 min.
The magnesium oxide, magnesium sulfate and water react to form a crystalline phase, and the reaction process is as follows:
5MgO+MgSO4+12H2O＝5Mg(OH)2MgSO4·7H2O；
citric acid monohydrate, sodium citrate and talcum powder synergistically prolong the reaction crystallization and condensation time of magnesium oxide and magnesium sulfate, prevent water from evaporating too fast, and improve the stability and uniformity of a crystallization phase, so that the strength and acid-base corrosion resistance of the prepared flame-retardant pipeline are improved; the calcium stearate is added to improve the water resistance and the water resistance of the material, improve the softening coefficient of the material and reduce the overall deformation of the material after the material is contacted with external water.
When various fillers are added into the slurry, the heat inside the prepared material cannot be released, when the external temperature and pressure are gradually increased, and the heat reaches a certain degree, the material is expanded, cracks and even bursting easily occur, and in addition, the bentonite is easy to absorb water and expand, so that the filling effect and the material strength are influenced; the bentonite in the invention can enhance the fire-proof limit of the material, simultaneously increase the plasticity and cohesiveness of the slurry, inhibit the layering phenomenon of the non-woven fabric layer and the glass fiber grey cloth layer, the talcum powder promotes the self-hydration reaction of the fly ash to generate calcium silicate, the waterproofness of the material is increased, the hydration heat is synergistically reduced, so that the temperature stress is reduced, the material is inhibited from generating cracks or bursting under high temperature and high pressure, the setting time of a crystalline phase is prolonged, the stability of the material is increased, the fly ash is uniformly dispersed in the slurry and is combined with the crystalline phase, so that capillary pores in the slurry are refined, the strength of the material is enhanced, the impermeability and the durability of the material are improved, and the water swelling property of the.
Further, the colloidal slurry is subjected to radiation treatment for 6-8 hours by adopting Cs-137, so that the molecular structure of the slurry is changed, the toughness and tensile strength of the material are enhanced, and the surface cracking and pulverization of the material are inhibited.
Most specifically, the preparation method of the cable flame-retardant pipeline is characterized by comprising the following steps of:
step (1): taking 60-65 parts of water according to the proportion, adding 55-60 parts of magnesium sulfate to mix into magnesium sulfate solution, and sending the magnesium sulfate solution into a stirrer for later use;
step (2): weighing 100 parts of magnesium oxide and 0.5-2.8 parts of calcium stearate, sequentially adding into a proportioning bin, conveying into a stirrer, and stirring together with a magnesium sulfate solution for 15-20min at a stirring speed of 80-100 r/min;
and (3): sequentially adding 5-10 parts of bentonite, 12-28 parts of fly ash, 18-28 parts of talcum powder, 0.8-1.6 parts of citric acid monohydrate and 0.5-1 part of sodium citrate, stirring for 10-15min at the speed of 100-120r/min to form colloidal slurry, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D of 5.5-6 mu m and talcum powder B with the particle size of 9-10 mu m and different in thickness, and the mass ratio of the talcum powder A: talcum powder B is 2: 1-1.5;
and (4): performing irradiation treatment on the slurry in the step (3) for 6-8h by adopting Cs-137;
and (5): impregnating non-woven fabrics with the colloidal slurry after the irradiation treatment, spirally and continuously winding the non-woven fabrics on the surface of a tubular core mould, sequentially winding low-alkali glass fiber grey fabrics impregnated with the colloidal slurry on the core mould wound with the non-woven fabrics, finally winding the non-woven fabrics impregnated with the colloidal slurry on the outermost surface, wherein the layer ratio of the non-woven fabrics, the glass fiber grey fabrics and the non-woven fabrics wound sequentially is 1:8-14:1, then curing for 7-12 hours at the temperature of 35-45 ℃ and the humidity of 80-90%, demoulding, curing for 36 hours at the temperature of 30-40 ℃ and the humidity of 65-70%, and then curing for 7 days at normal temperature and entering a cutting production line.
In the preparation process, the talcum powder is easy to suspend on the surface of the slurry, bentonite is agglomerated in the slurry, the dispersibility and the surface structure are poor, the mechanical strength of the prepared fire-resistant cable trough box assembly material is influenced, warping, deformation, size deviation and the like are easy to occur, and the volume of the cured fire-retardant tube is seriously shrunk, so that the demolding is difficult. According to the invention, the reaction auxiliary agents, namely citric acid monohydrate, sodium citrate and organic silicon, are added after the filler is added, so that the talcum powder and the bentonite are uniformly dispersed in the slurry, and the effect of the talcum powder and the bentonite is effectively exerted, so that the environment-friendly fire-resistant cable trough box component material has good glossiness, good uniformity, good fire resistance and moisture resistance, and good mechanical property.
The invention has the following technical effects:
the cable flame-retardant pipeline prepared by the invention comprises the following components: (1) the formaldehyde emission is as low as 0.1ml/L, reaches E0 grade and is greatly lower than European Union standard, and no other radioactive substances are generated; (2) the mechanical strength is high, the breaking strength reaches more than 45MPa, and the bearing capacity can reach 13000 KN; (3) the cable has excellent physical and chemical properties, has excellent waterproof capability and corrosion resistance, prevents the cable from being affected with damp and corrosion, thereby preventing the possibility of cable fire and prolonging the service life of the cable flame-retardant pipeline; (4) the fireproof cable has excellent fireproof performance, the fireproof performance reaches A1 level, deformation does not occur at the flame temperature of 1400 ℃, the material does not melt at the temperature of 2800 ℃, the fire resistance limit can reach 4h, and the fireproof cable has excellent heat insulation performance, and when the cable is on fire, a fire does not occur.
Detailed Description
The present invention is described in detail below by way of examples, it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make some insubstantial modifications and adaptations of the present invention based on the above-mentioned disclosure.
Example 1
A preparation method of a cable flame-retardant pipeline is carried out according to the following scheme:
step (1): taking 62 parts of water according to the proportion, adding 58 parts of magnesium sulfate to mix into magnesium sulfate solution, and sending the magnesium sulfate solution into a stirrer for later use;
step (2): weighing 100 parts of magnesium oxide and 1 part of calcium stearate, sequentially adding the magnesium oxide and the calcium stearate into a proportioning bin, conveying the mixture into a stirrer, and stirring the mixture and the magnesium sulfate solution for 18min at a stirring speed of 90 r/min;
and (3): sequentially adding 6 parts of bentonite, 15 parts of fly ash, 25 parts of talcum powder, 1 part of citric acid monohydrate and 0.8 part of sodium citrate, stirring for 12min at 110r/min to form colloidal slurry, wherein the talcum powder is a mixture consisting of two talcum powders with different thicknesses, namely talcum powder A with the particle size D being 5.8 mu m and talcum powder B with the particle size being 9.5 mu m, and the talcum powder A and the talcum powder B are composed of the following components in mass ratio: talcum powder B is 2: 1;
and (4): performing irradiation treatment on the slurry in the step (3) for 7 hours by adopting Cs-137;
and (5): impregnating non-woven fabrics with the colloidal slurry after the irradiation treatment, spirally and continuously winding the non-woven fabrics on the surface of a tubular core mould, sequentially winding low-alkali glass fiber gray fabrics impregnated with the colloidal slurry on the core mould wound with the non-woven fabrics, finally winding the non-woven fabrics impregnated with the colloidal slurry on the outermost surface, wherein the layer ratio of the non-woven fabrics, the low-alkali glass fiber gray fabrics and the non-woven fabrics wound sequentially is 1:12:1, then curing for 10 hours under the conditions of 40 ℃ and 85% humidity, demoulding, curing for 36 hours under the conditions of 35 ℃ and 68% humidity, then curing for 7 days at normal temperature, and then entering a cutting production line.
The cable flame-retardant tube prepared by the invention is subjected to performance test, the chemical properties of the cable flame-retardant tube are shown in table 1, and the combustion performance of the cable flame-retardant tube is shown in table 2.
Table 1:
the product of the invention is respectively soaked in clear water, saline water, acidic water and alkaline water for 20 days at the temperature of 20 +/-3 ℃, and the product has no obvious deformation, no peeling, pulverization and other phenomena on the surface. The cable flame-retardant pipeline prepared by the invention has excellent water resistance and acid and alkali corrosion resistance, and can effectively prevent the cable in the flame-retardant pipeline from being affected with damp, acid, alkali, salt and the like.
Table 2:
the fire-retardant cable pipeline prepared by the invention has the fire-retardant grade up to A1 grade, the fire-resistant limit up to 4 hours, and the cable pipeline does not deform when meeting the flame temperature of 1500 ℃ and can not be melted at the high temperature of 2800 ℃.
Example 2
A preparation method of a cable flame-retardant pipeline is carried out according to the following scheme:
step (1): taking 65 parts of water according to the proportion, adding 55 parts of magnesium sulfate to mix into magnesium sulfate solution, and sending the magnesium sulfate solution into a stirrer for later use;
step (2): weighing 100 parts of magnesium oxide and 0.5 part of calcium stearate, sequentially adding the magnesium oxide and the calcium stearate into a proportioning bin, conveying the mixture into a stirrer, and stirring the mixture and the magnesium sulfate solution for 15min at a stirring speed of 100 r/min;
and (3): sequentially adding 10 parts of bentonite, 12 parts of fly ash, 28 parts of talcum powder, 0.8 part of citric acid monohydrate and 0.5 part of sodium citrate, stirring for 10min at the speed of 120r/min to form colloidal slurry, wherein the talcum powder is a mixture consisting of 6-micron-sized talcum powder A and 9-micron-sized talcum powder B, and the talcum powder A and the talcum powder B have different thicknesses and are prepared according to the mass ratio: talcum powder B is 2: 1.5;
and (4): performing irradiation treatment on the slurry in the step (3) for 6 hours by adopting Cs-137;
and (5): impregnating non-woven fabrics with the colloidal slurry after irradiation treatment, spirally and continuously winding the non-woven fabrics on the surface of a tubular core mould, sequentially winding low-alkali glass fiber gray fabrics impregnated with the colloidal slurry on the core mould wound with the non-woven fabrics, finally winding the non-woven fabrics impregnated with the colloidal slurry on the outermost surface, wherein the layer ratio of the non-woven fabrics, the low-alkali glass fiber gray fabrics and the non-woven fabrics wound sequentially is 1:8:1, then curing for 12 hours under the conditions of 45 ℃ and 80% humidity, demoulding, curing for 36 hours under the conditions of 30 ℃ and 65% humidity, then curing for 7 days at normal temperature, and then entering a cutting production line.
Example 3
A preparation method of a cable flame-retardant pipeline is carried out according to the following scheme:
step (1): taking 60 parts of water according to the proportion, adding 60 parts of magnesium sulfate to mix into magnesium sulfate solution, and sending the magnesium sulfate solution into a stirrer for later use;
step (2): weighing 100 parts of magnesium oxide and 2.8 parts of calcium stearate, sequentially adding into a proportioning bin, conveying into a stirrer, and stirring with a magnesium sulfate solution for 20min at a stirring speed of 80 r/min;
and (3): sequentially adding 5 parts of bentonite, 28 parts of fly ash, 18 parts of talcum powder, 1.6 parts of citric acid monohydrate and 1 part of sodium citrate, stirring for 10-15min at 100r/min to form colloidal slurry, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D being 5.5 mu m and talcum powder B with the particle size being 10 mu m and different in thickness, and the talcum powder A and the talcum powder B are prepared according to the following mass ratio: talcum powder B is 2: 1.3;
and (4): performing irradiation treatment on the slurry in the step (3) for 8 hours by adopting Cs-137;
and (5): impregnating non-woven fabrics with the colloidal slurry after the irradiation treatment, spirally and continuously winding the non-woven fabrics on the surface of a tubular core mould, sequentially winding low-alkali glass fiber gray fabrics impregnated with the colloidal slurry on the core mould wound with the non-woven fabrics, finally winding the non-woven fabrics impregnated with the colloidal slurry on the outermost surface, wherein the layer ratio of the non-woven fabrics, the low-alkali glass fiber gray fabrics and the non-woven fabrics wound sequentially is 1:14:1, then curing for 7 hours at 35 ℃ and 90% humidity, demoulding, curing for 36 hours at 40 ℃ and 70% humidity, then curing for 7 days at normal temperature, and then entering a cutting production line.
The physical properties and mechanical properties of the flame-retardant cable duct prepared according to the present invention were measured as shown in table 3.
Table 3:
the cable flame-retardant pipeline prepared by the invention has the advantages of dry shrinkage of 0.1%, wet expansion of 0.1%, good dimensional stability of the plate, high mechanical strength, flexural strength of more than 45MPa and bearing capacity of 13000 KN.
Claims (4)
1. A preparation method of a cable flame-retardant pipeline is characterized by comprising the following steps: the cable flame-retardant pipeline is characterized in that 100 parts of magnesium oxide, 55-60 parts of magnesium sulfate and 60-65 parts of water are used as reaction raw materials, 0.8-1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate, 1-2 parts of organic silicon and 0.5-2.8 parts of calcium stearate are used as modification aids, 5-10 parts of bentonite, 12-28 parts of fly ash and 18-28 parts of talcum powder are used as filling materials to prepare colloidal slurry, a non-woven fabric is soaked in the colloidal slurry and then spirally and continuously wound on the surface of a tubular core mold, a low-alkali glass fiber gray fabric soaked with the colloidal slurry is sequentially wound on the core mold wound with the non-woven fabric, finally the non-woven fabric soaked with the colloidal slurry is wound on the outermost surface, the layer ratio of the sequentially wound non-woven fabric, the low-alkali glass fiber gray fabric and the non-woven fabric is 1:8-14:1, and then the non-woven fabric, Curing for 7-12 hours under the condition of 80-90% humidity, demolding, and curing for 36 hours under the conditions of 30-40 ℃ and 60-70% humidity, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D =5.5-6 μm and talcum powder B with the particle size of 9-10 μm, and the talcum powder A and the talcum powder B have different thicknesses and are prepared from the following components in mass ratio: talc B =2: 1-1.5.
2. The method for preparing a flame-retardant cable duct according to claim 1, wherein the method comprises the following steps: the slurry is prepared by adding magnesium sulfate into water to prepare a solution, then sequentially adding magnesium oxide and calcium stearate, stirring for 15-20min at a stirring speed of 80-100r/min, then adding bentonite, fly ash, talcum powder, citric acid monohydrate, citric acid and sodium organic silicon, and stirring to prepare the slurry, wherein the stirring speed is 100-120r/min, and the stirring time is 10-15 min.
3. A method for preparing a flame retardant cable duct according to claim 1 or 2, wherein: and (3) irradiating the colloidal slurry for 6-8h by adopting Cs-137.
4. The preparation method of the cable flame-retardant pipeline is characterized by comprising the following steps of:
step (1): taking 60-65 parts of water according to the proportion, adding 55-60 parts of magnesium sulfate to mix into magnesium sulfate solution, and sending the magnesium sulfate solution into a stirrer for later use;
step (2): weighing 100 parts of magnesium oxide and 0.5-2.8 parts of calcium stearate, sequentially adding into a proportioning bin, conveying into a stirrer, and stirring together with a magnesium sulfate solution for 15-20min at a stirring speed of 80-100 r/min;
and (3): sequentially adding 5-10 parts of bentonite, 12-28 parts of fly ash, 18-28 parts of talcum powder, 0.8-1.6 parts of citric acid monohydrate and 0.5-1 part of sodium citrate, stirring for 10-15min at the speed of 100-120r/min to form colloidal slurry, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D =5.5-6 mu m and talcum powder B with the particle size of 9-10 mu m and different in thickness, and the mass ratio of the talcum powder A: talcum powder B =2: 1-1.5;
and (4): performing irradiation treatment on the slurry in the step (3) for 6-8h by adopting Cs-137;
and (5): impregnating non-woven fabrics with the colloidal slurry after the irradiation treatment, spirally and continuously winding the non-woven fabrics on the surface of a tubular core mould, sequentially winding low-alkali glass fiber grey fabrics impregnated with the colloidal slurry on the core mould wound with the non-woven fabrics, finally winding the non-woven fabrics impregnated with the colloidal slurry on the outermost surface, wherein the layer ratio of the non-woven fabrics, the glass fiber grey fabrics and the non-woven fabrics wound sequentially is 1:8-14:1, then curing for 7-12 hours at the temperature of 35-45 ℃ and the humidity of 80-90%, demoulding, curing for 36 hours at the temperature of 30-40 ℃ and the humidity of 65-70%, and then curing for 7 days at normal temperature and entering a cutting production line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010281935.7A CN111302759B (en) | 2020-04-11 | 2020-04-11 | Preparation method of cable flame-retardant pipeline |
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| CN202010281935.7A CN111302759B (en) | 2020-04-11 | 2020-04-11 | Preparation method of cable flame-retardant pipeline |
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| CN111302759A true CN111302759A (en) | 2020-06-19 |
| CN111302759B CN111302759B (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010281935.7A Active CN111302759B (en) | 2020-04-11 | 2020-04-11 | Preparation method of cable flame-retardant pipeline |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2032106A5 (en) * | 1969-02-13 | 1970-11-20 | Augier Ets | High tension electric supply for buildings |
| JPH10226555A (en) * | 1997-02-14 | 1998-08-25 | C I Kasei Co Ltd | Cable protecting tube holder, its production and structure of cable protecting tube connecting part |
| CN105130350A (en) * | 2015-08-13 | 2015-12-09 | 惠州美森板业有限公司 | Novel inorganic decoration base material plate and preparation method thereof |
| CN108774042A (en) * | 2018-05-24 | 2018-11-09 | 武汉格林森建筑科技有限公司 | One seeds algae calcium and magnesium composite material, ecological composite plate and its preparation and application |
| CN109942863A (en) * | 2019-03-19 | 2019-06-28 | 江苏馨德高分子材料股份有限公司 | A kind of high performance power cable protective case and its production method |
-
2020
- 2020-04-11 CN CN202010281935.7A patent/CN111302759B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2032106A5 (en) * | 1969-02-13 | 1970-11-20 | Augier Ets | High tension electric supply for buildings |
| JPH10226555A (en) * | 1997-02-14 | 1998-08-25 | C I Kasei Co Ltd | Cable protecting tube holder, its production and structure of cable protecting tube connecting part |
| CN105130350A (en) * | 2015-08-13 | 2015-12-09 | 惠州美森板业有限公司 | Novel inorganic decoration base material plate and preparation method thereof |
| CN108774042A (en) * | 2018-05-24 | 2018-11-09 | 武汉格林森建筑科技有限公司 | One seeds algae calcium and magnesium composite material, ecological composite plate and its preparation and application |
| CN109942863A (en) * | 2019-03-19 | 2019-06-28 | 江苏馨德高分子材料股份有限公司 | A kind of high performance power cable protective case and its production method |
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| CN111302759B (en) | 2022-01-11 |
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