A cable flexible comprehensive protective layer and preparation method thereof

Abstract

The present application relates to the technical field of cable protective materials, and more specifically, it relates to a flexible integrated protective layer for cables and a preparation method thereof. The flexible integrated protective layer for cables, from outside to inside, includes an anti-corrosion layer and an insulating and heat-insulating layer, and a plurality of rectangular cavities are formed between the anti-corrosion layer and the insulating and heat-insulating layer, and the cavities are filled with a fireproof, heat-insulating and explosion-proof material layer, and a fireproof rope is arranged on the anti-corrosion layer; the fireproof, heat-insulating and explosion-proof material layer, from outside to inside, is composed of a fireproof layer, a heat-insulating layer and an explosion-proof layer. The preparation method of the flexible integrated protective layer for cables is as follows: overlapping the explosion-proof layer, the heat-insulating layer and the fireproof layer in sequence to obtain a fireproof, heat-insulating and explosion-proof material layer; filling the fireproof, heat-insulating and explosion-proof material layer in the cavity, and sewing the cavity into a closed cavity to obtain a semi-finished product; then, sewing the fireproof rope at both ends of the semi-finished product in the width direction to obtain a flexible integrated protective layer for cables. The flexible integrated protective layer for cables obtained in the present application has good softness and fireproof and heat-insulating properties.

Description

Technical Field

[0001] The present application relates to the technical field of cable protection materials, and more specifically, to a flexible integrated cable protection layer and a preparation method thereof. Background Art

[0002] Cable explosion-proof blanket is a flame-retardant heat-insulating material that uses glass fiber cloth as a reinforcement material and non-combustible resin as a matrix. By wrapping and fixing the cable explosion-proof blanket on the outside of the cable, it can provide fire protection and heat insulation for the cable. Moreover, the softer the cable explosion-proof blanket is, the easier it is to wrap around the outside of the cable, and the more convenient it is to install.

[0003] Because the lower the density of the material component, the softer the material will be. Therefore, in order to improve the softness of the cable explosion-proof blanket, people generally use materials with lower density when preparing the cable explosion-proof blanket. However, it is found during use that the fireproof and heat-insulating properties of the cable explosion-proof blanket prepared with materials with lower density will decrease to a certain extent.

[0004] Therefore, there is an urgent need for a cable explosion-proof blanket with good softness and good fireproof and heat-insulating properties. Summary of the invention

[0005] In order to solve the above problems, the present application provides a cable flexible comprehensive protective layer and a preparation method thereof.

[0006] In a first aspect, the present application provides a flexible integrated protective layer for cables, which adopts the following technical solution:

[0007] A flexible integrated cable protective layer, comprising an anti-corrosion layer and an insulating and heat-insulating layer from outside to inside, a plurality of rectangular cavities are formed between the anti-corrosion layer and the insulating and heat-insulating layer, the cavities are filled with a fireproof, heat-insulating and explosion-proof material layer, and a fireproof rope is arranged on the anti-corrosion layer;

[0008] The fireproof, heat-insulating and explosion-proof material layer consists of a fireproof layer, a heat-insulating layer and an explosion-proof layer from the outside to the inside.

[0009] By adopting the above technical solution, firstly, the fireproof, heat-insulating and explosion-proof material layer is filled in a plurality of continuous cavities, and the fireproof, heat-insulating and explosion-proof material layer in the cavity and the anti-corrosion layer and the insulating and heat-insulating layer forming the cavity constitute a fireproof and heat-insulating unit. Since the plurality of fireproof and heat-insulating units are easy to bend, the cable flexible comprehensive protective layer composed of a plurality of parallel fireproof and heat-insulating units has better flexibility than the whole blanket type cable explosion-proof blanket.

[0010] Secondly, due to the special structure of the cable flexible comprehensive protective layer of the present application, it is not necessary to reduce the material density to prepare a cable flexible comprehensive protective layer with good softness. Therefore, the cable flexible comprehensive protective layer of the present application has better fireproof and heat-insulating performance and applicability than the full-blanket cable explosion-proof blanket currently on the market. At the same time, since the cable flexible comprehensive protective layer of the present application has good softness, a material layer with a higher density can also be used to improve the fireproof and heat-insulating performance of the cable flexible comprehensive protective layer of the present application.

[0011] Thirdly, when the cable flexible integrated protective layer is installed on the outside of the cable, on the one hand, a plurality of bendable fireproof and heat-insulating units can be closely attached to the outside of the cable layer, reducing the gap between the cable flexible integrated protective layer and the outside of the cable, and further improving the fireproof and heat-insulating ability of the cable flexible integrated protective layer to the cable. On the other hand, when multiple layers (at least two layers) of cable flexible integrated protective layers are wrapped around the outside of the cable, the fireproof and heat-insulating units of the outer layer can be closely attached to the boundaries of the adjacent fireproof and heat-insulating units of the inner layer, which can improve the tightness and firmness of the multiple layers of cable flexible integrated protective layers when they are wrapped around the outside of the cable, and further improve the fireproof and heat-insulating ability of the cable flexible integrated protective layer to the cable.

[0012] Preferably, the fireproof layer is a high-aluminum refractory fiber layer; the thermal insulation layer is an aerogel felt layer; and the explosion-proof layer is an aluminum foil layer.

[0013] High-aluminum refractory fiber is a high-purity amorphous fiber heat-resistant refractory material with an alumina content of more than 58%, Al2O3 and SiO2 greater than 98.5%. It can withstand a temperature of 500°C without open flames and 300°C under open flames. Aerogel felt is a flexible thermal insulation felt. Due to its high density of vacuum-compressed silica fiber and the solidification of high-temperature resistant glue, it has good thermal insulation and can prevent open flames. It can withstand a temperature of 680°C without open flames.

[0014] By adopting the above technical scheme, the fireproof, heat-insulating and explosion-proof material layer is composed of a high-aluminum refractory fiber layer, an aerogel felt layer and an aluminum foil layer from the outside to the inside. Due to the special combination structure between the three material layers, the temperature of the inner layer of the cable flexible comprehensive protective layer can be reduced to below 200°C when continuously baked with an open flame at 1000°C for 60 minutes, and the cable has good fireproof and heat-insulating properties.

[0015] Preferably, the thickness of the fireproof, heat-insulating and explosion-proof material layer is 26.3-37 mm.

[0016] By adopting the above technical solution, the cable flexible comprehensive protective layer prepared by the fireproof, heat-insulating and explosion-proof material layer of the above thickness has both good fireproof, heat-insulating performance and softness.

[0017] Preferably, the width of the cavity is 36.3-47 mm.

[0018] By adopting the above technical scheme, the appearance of the flexible integrated protective layer of the cable is relatively neat, and the displacement of the fireproof, heat-insulating and explosion-proof material layer in the cavity can be reduced, which is beneficial to improving the thermal insulation performance of the flexible integrated protective layer of the cable. At the same time, since the fireproof, heat-insulating and explosion-proof material layer will expand when heated, by controlling the width of the cavity, especially when the cavity width is equal to the thickness of the fireproof, heat-insulating and explosion-proof material layer plus 10mm, it is more conducive to accommodating the expanded fireproof, heat-insulating and explosion-proof material layer, which is beneficial to protecting the flexible integrated protective layer of the cable and extending the service life of the flexible integrated protective layer of the cable.

[0019] Preferably, the anti-corrosion layer is a high-silica fire-retardant coating cloth layer.

[0020] Preferably, the insulating and heat-insulating layer is a high-silica fireproof cloth layer.

[0021] Preferably, the fireproof rope is a high-performance aramid steel wire reinforced sewing thread.

[0022] In a second aspect, the present application provides a method for preparing a flexible integrated protective layer for a cable, using the following technical solution:

[0023] A method for preparing a flexible comprehensive protective layer for a cable, comprising the following preparation steps:

[0024] S1: overlapping the explosion-proof layer, the thermal insulation layer and the fireproof layer in sequence to obtain a fireproof, thermal insulation and explosion-proof material;

[0025] S2: Fill the fireproof, heat-insulating and explosion-proof material layer into the rectangular cavity formed by the anti-corrosion layer and the insulating and heat-insulating layer, and sew the cavity into a closed cavity to obtain a semi-finished product; then, sew the fireproof rope at both ends of the semi-finished product in the width direction to obtain a flexible comprehensive protective layer for the cable.

[0026] By adopting the above technical scheme, the method for preparing the flexible integrated protective layer of the cable of the present application has simple steps, simple operation, and is convenient for large-scale production.

[0027] In summary, this application has the following beneficial effects:

[0028] The present application fills multiple continuous cavities formed between the anti-corrosion layer and the insulating and heat-insulating layer with fire-proof, heat-insulating and explosion-proof material layers composed of a fire-proof layer, a heat-insulating layer and an explosion-proof layer from the outside to the inside. The resulting cable flexible comprehensive protective layer has good softness and fire-proof and heat-insulating properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of the flexible integrated protective layer for cables in an embodiment of the present application;

[0030] Figure 2It is a schematic diagram of the cross-sectional structure of the flexible integrated protective layer of the cable in the embodiment of the present application;

[0031] Figure 3 It is a flow chart for preparing the flexible integrated protective layer for cables in the embodiment of the present application.

[0032] Description of the drawings: 1. Anti-corrosion layer; 2. Insulation layer; 3. Fireproof, heat-insulating and explosion-proof material layer; 301. Fireproof layer; 302. Insulation layer; 303. Explosion-proof layer; 4. Fireproof rope. DETAILED DESCRIPTION

[0033] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0034] Performance Testing

[0035] The cable flexible comprehensive protective layer obtained in the embodiment and the cable explosion-proof blanket obtained in the comparative example were tested for fire resistance and temperature resistance, and the testing method was as follows:

[0036] Test method: butane combustion test;

[0037] The specific experimental steps are as follows:

[0038] (1) A thermocouple thermometer is fixed on the cable, and then a layer of cable flexible comprehensive protective layer or cable explosion-proof blanket is wrapped and fixed on the cable fixed with the thermocouple thermometer to obtain a sample to be tested, wherein the initial temperature of the thermocouple thermometer in the sample to be tested is 33°C, and the thermocouple thermometer, model TA612B, is purchased from Teans Hardware Store.

[0039] (2) Use a GAS explosion-proof butane torch with a flame temperature of 1000°C to continuously burn the same location of the sample to be tested, and record the temperature of the temperature measuring instrument every 10 minutes. The burning time is 60 minutes.

[0040] Example

[0041] Example 1

[0042] A flexible integrated protective layer for cables, referring to Figure 1 , from outside to inside, including an anti-corrosion layer 1 and an insulating and heat-insulating layer 2. A plurality of rectangular cavities are formed between the anti-corrosion layer 1 and the insulating and heat-insulating layer 2, and the cavities are filled with a fireproof, heat-insulating and explosion-proof material layer 3, and a fireproof rope 4 is fixedly arranged on the anti-corrosion layer 1.

[0043] The anti-corrosion layer 1 mentioned above is a high-silicon-oxygen fire-retardant coating cloth layer with a thickness of 0.8 mm, a length of 100 cm, and a width of 60 cm, purchased from Suzhou Jujiu Fireproof Material Co., Ltd.;

[0044] The insulating layer 2 is a high-silica fireproof cloth layer with a thickness of 0.8 mm, a length of 100 cm, and a width of 60 cm, which is purchased from Suzhou Jujiu Fireproof Materials Co., Ltd.

[0045] The fireproof rope 4 is a high-performance aramid steel wire reinforced sewing thread, and the distance between adjacent fireproof ropes 4 is 200 mm.

[0046] Reference Figure 2 The fireproof, heat-insulating and explosion-proof material layer 3, from outside to inside, consists of a fireproof layer 301, a heat-insulating layer 302 and an explosion-proof layer 303;

[0047] The fireproof layer 301 is a high-aluminum fireproof fiber layer with a thickness of 10 mm, a length of 60 cm, and a width of 8 cm, purchased from Suzhou Yongse Co., Ltd.

[0048] The thermal insulation layer 302 is an aerogel felt layer, the density of the aerogel felt layer is 191.48 kg / m3, the thermal conductivity at 25°C is 0.021 W / (m·K), the heat load shrinkage temperature is 758°C, the heating permanent linear change is 0.6%, the tensile strength is 432.36 KPa, and the compressive strength is 80.48 KPa.

[0049] The aerogel felt layer has a thickness of 15 mm, a length of 60 cm, and a width of 8 cm;

[0050] The explosion-proof layer 303 is an aluminum foil layer with a thickness of 1.3 mm, a length of 60 cm, and a width of 8 cm, which was purchased from Suzhou Yongse Co., Ltd.

[0051] In the embodiments of the present application, only the width and length of the above-mentioned material layers are taken as examples for illustration. However, in actual production, the width and length of each material layer can be customized according to actual needs.

[0052] The method for preparing the above-mentioned cable flexible comprehensive protective layer comprises the following steps:

[0053] S1: overlapping the explosion-proof layer 303, the thermal insulation layer 302 and the fireproof layer 301 in sequence to obtain a fireproof, thermal insulation and explosion-proof material layer 3.

[0054] S2: Reference Figure 3 3-1 and 3-2 in the figure, after the anti-corrosion layer 1 and the insulation layer 2 are overlapped, they are sewn to form a cavity with one opening remaining ( Figure 3 The dotted lines in 3-1 and 3-2 represent the opening of the cavity), wherein the width of the cavity is 36.3 mm;

[0055] Fill the cavity with a fireproof, heat-insulating and explosion-proof material layer 3, referring to Figure 3 3-3, the cavity is sutured to form a closed cavity to obtain a semi-finished product. Then, refer to Figure 33-4, sew the fireproof rope 4 to the two ends of the semi-finished product in the width direction to obtain the flexible comprehensive protective layer of the cable.

[0056] After testing, the thickness of the flexible comprehensive protective layer of the cable obtained above is 27.9 mm.

[0057] Embodiment 2-5

[0058] A flexible integrated protective layer for cables, which is different from Example 1 in that the thickness of the fireproof, heat-insulating and explosion-proof material layer 3, the thickness of the flexible integrated protective layer for cables and the width of the cavity are as shown in the following table.

[0059]

[0060] The cable flexible comprehensive protective layer obtained in the above embodiments 1-5 was subjected to heat resistance test, and the test results are shown in the following table.

[0061]

[0062] By analyzing the data in the above table, it can be seen that the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Examples 1-5 of the present application is as low as 139.5-150.5°C when continuously baked with an open flame at 1000°C for 60 minutes.

[0063] By analyzing Examples 1-3 and 4 in combination with the above table, it can be seen that the thickness of the fireproof, heat-insulating and explosion-proof material layer 3 in Example 4 is lower than the thickness of the fireproof, heat-insulating and explosion-proof material layer 3 in Examples 1-3. Therefore, under the condition of continuous burning with an open flame at 1000°C for 60 minutes, the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Example 4 is higher than the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Examples 1-3.

[0064] By analyzing Examples 1-3 and 5 in combination with the above table, it can be seen that the thickness of the fireproof, heat-insulating and explosion-proof material layer 3 in Example 5 is higher than the thickness of the fireproof, heat-insulating and explosion-proof material layer 3 in Examples 1-3. Therefore, under the condition of continuous burning with an open flame at 1000°C for 60 minutes, the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Example 5 is lower than the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Examples 1-3.

[0065] Through the above analysis, it can be known that in the total raw materials for preparing the flexible comprehensive protective layer of the cable of the present application, the thickness of the fireproof, heat-insulating and explosion-proof material layer 3 increases, and the fireproof and heat-insulating properties of the obtained flexible comprehensive protective layer of the cable are enhanced. However, the inventors found in application that the softness of the flexible comprehensive protective layer of the cable obtained in Examples 1-3 is better than the softness of the flexible comprehensive protective layer of the cable obtained in Example 5, and the softness of the flexible comprehensive protective layer of the cable obtained in Example 4 is better than the softness of the flexible comprehensive protective layer of the cable obtained in Examples 1-3. Therefore, in order to take into account the softness and fireproof and heat-insulating properties of the flexible comprehensive protective layer of the cable, the thickness of the fireproof, heat-insulating and explosion-proof material of the present application is preferably 26.3-37mm.

[0066] Comparative Example

[0067] Comparative Example 1

[0068] A cable explosion-proof blanket, which is different from Example 1 in that a fireproof layer 301 of equal thickness is used to replace a thermal insulation layer 302 and an explosion-proof layer 303.

[0069] Comparative Example 2

[0070] A cable explosion-proof blanket is different from the embodiment 1 in that a thermal insulation layer 302 of equal thickness is used to replace the fireproof layer 301, the thermal insulation layer 302 and the explosion-proof layer 303.

[0071] Comparative Example 3

[0072] A cable explosion-proof blanket, which is different from Example 1 in that an explosion-proof layer 303 of equal thickness is used to replace a thermal insulation layer 302 and a fireproof layer 301.

[0073] Comparative Example 4

[0074] A cable explosion-proof blanket is different from Example 1 in that the fireproof, heat-insulating and explosion-proof material layer 3 is composed of a fireproof layer 301, an explosion-proof layer 303 and a heat-insulating layer 302 from the outside to the inside.

[0075] Comparative Example 5

[0076] A cable explosion-proof blanket is different from Example 1 in that the fireproof, heat-insulating and explosion-proof material layer 3 is composed of a heat-insulating layer 302, a fireproof layer 301 and an explosion-proof layer 303 from the outside to the inside.

[0077] Comparative Example 6

[0078] A cable explosion-proof blanket is different from Example 1 in that the fireproof, heat-insulating and explosion-proof material layer 3 is composed of a heat-insulating layer 302, an explosion-proof layer 303 and a fireproof layer 301 from the outside to the inside.

[0079] Comparative Example 7

[0080] A cable explosion-proof blanket is different from Example 1 in that the fireproof, heat-insulating and explosion-proof material layer 3 is composed of an explosion-proof layer 303, a fireproof layer 301 and a heat-insulating layer 302 from the outside to the inside.

[0081] Comparative Example 8

[0082] A cable explosion-proof blanket is different from Example 1 in that the fireproof, heat-insulating and explosion-proof material layer 3 is composed of an explosion-proof layer 303, a heat-insulating layer 302 and a fireproof layer 301 from the outside to the inside.

[0083] Comparative Example 9

[0084] A cable explosion-proof blanket, which is different from Example 1 in that the cable explosion-proof blanket is a whole blanket structure, which, from the outside to the inside, consists of an anti-corrosion layer 1, a fireproof layer 301, a thermal insulation layer 302, an explosion-proof layer 303 and an insulating and heat-insulating layer 2.

[0085] The preparation method of the above cable explosion-proof blanket is as follows: from the outside to the inside, after overlapping the anti-corrosion layer 1, the fireproof layer 301, the thermal insulation layer 302, the explosion-proof layer 303 and the insulating thermal insulation layer 2, the five material layers are sewed together to obtain a cable explosion-proof blanket with a whole blanket structure.

[0086] Comparative Example 10

[0087] A cable explosion-proof blanket is a commercially available whole-blanket cable explosion-proof blanket, the outer layer of which is made of high-temperature resistant silicone coated glass fiber cloth, and the inner interlayer is a high-temperature resistant layer, a 304 stainless steel plate, a composite metal foil heat-reflecting layer, an explosion-proof fiber layer and an anti-static layer; the cable explosion-proof blanket model is ZR-FHT-1, and the high temperature resistance can reach above 1200°C.

[0088] The cable explosion-proof blankets obtained in the above comparative examples 1-10 were subjected to heat resistance testing, and the test results are shown in the following table.

[0089]

[0090] According to the above table, the embodiment 1 and comparative examples 1-3 are analyzed to know that the embodiment 1 uses the fireproof, heat-insulating and explosion-proof material layer 3 composed of the fireproof layer 301, the heat-insulating layer 302 and the explosion-proof layer 303. Compared with the fireproof, heat-insulating and explosion-proof material layer 3 composed of a single material layer in comparative examples 1-3, after continuous burning with an open flame at 1000°C for 60 minutes, the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in embodiment 1 is lower than the temperature of the inner layer of the cable explosion-proof blanket obtained in comparative examples 1-3, and during the continuous burning with an open flame at 1000°C for 60 minutes, the temperature of the inner layer of the cable explosion-proof blanket obtained in comparative examples 1-3 rises significantly. At the same time, when the cable fire blanket obtained in comparative example 2 is continuously burned with an open flame at 1000°C, open flame splashes appear at the burning place on the outside of the cable fire blanket.

[0091] The fireproof, heat-insulating and explosion-proof material layer 3 used in Example 1 is composed of a fireproof layer 301, a heat-insulating layer 302 and an explosion-proof layer 303 from the outside to the inside. Compared with the fireproof, heat-insulating and explosion-proof material layer 3 with different structures used in Comparative Examples 4-8, after continuous burning at 1000°C open flame for 60 minutes, the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Example 1 is lower than the temperature of the inner layer of the cable explosion-proof blanket obtained in Comparative Examples 4-8, and during the continuous burning at 1000°C open flame for 60 minutes, the temperature of the inner layer of the cable explosion-proof blanket obtained in Comparative Examples 1-3 rises significantly. At the same time, when the cable fire blanket obtained in Comparative Example 6 is continuously burned at 1000°C open flame, the burning place on the outside of the cable fire blanket is punctured and open flame splashes appear.

[0092] Through the above analysis, it can be seen that in the preparation steps of the cable flexible comprehensive protective layer of the present application, the fireproof, heat-insulating and explosion-proof material layer 3, from the outside to the inside, is composed of a fireproof layer 301, a heat-insulating layer 302 and an explosion-proof layer 303. The obtained cable flexible comprehensive protective layer has better fireproof and heat-insulating effects.

[0093] By analyzing Example 1 and Comparative Example 9 in combination with the above table, it can be seen that the split-blanket-type cable flexible integrated protective layer obtained in Example 1, compared with the whole-blanket-type cable explosion-proof blanket obtained in Comparative Example 9, after continuous burning at 1000°C open flame for 60 minutes, the temperature of the inner layer of the cable flexible integrated protective layer obtained in Example 1 is lower than the temperature of the inner layer of the cable explosion-proof blanket obtained in Comparative Example 9, and during the continuous burning at 1000°C open flame for 60 minutes, the temperature of the inner layer of the cable explosion-proof blanket obtained in Comparative Example 9 rises significantly. The reason may be that during the continuous burning at 1000°C open flame, the fireproof layer 301, the thermal insulation layer 302 and the explosion-proof layer 303 in the cable flexible integrated protective layer and the cable explosion-proof blanket may expand due to the heat, but due to the effect of the cavity in the cable flexible integrated protective layer of the present application, the expanded fireproof layer 301, the thermal insulation layer 302 and the explosion-proof layer 303 can be accommodated. Therefore, compared with the full-blanket cable explosion-proof blanket, the fireproof layer 301, the thermal insulation layer 302 and the explosion-proof layer 303 of the present application will not be damaged even if they expand, and can continue to function. Therefore, compared with the full-blanket cable explosion-proof blanket of comparative example 9, the split-blanket cable flexible comprehensive protective layer of the present application has better flexibility and fireproof and thermal insulation effects.

[0094] When the present application performs a heat resistance test on the cable explosion-proof blanket of comparative example 10, the test thickness of the cable explosion-proof blanket of comparative example 10 is the same as the test thickness of the cable flexible integrated protective layer of embodiment 1 of the present application.

[0095] From the analysis of Example 1 and Comparative Example 10 in combination with the above table, it can be seen that the split-blanket-type cable flexible comprehensive protective layer obtained in Example 1, compared with the commercially available whole-blanket-type cable explosion-proof blanket in Comparative Example 11, after continuous burning with an open flame at 1000°C for 60 minutes, the temperature of the inner layer of the cable flexible comprehensive protective layer obtained in Example 1 is lower than the temperature of the inner layer of the cable explosion-proof blanket obtained in Comparative Example 10, and during the continuous burning with an open flame at 1000°C for 60 minutes, the temperature of the inner layer of the cable explosion-proof blanket obtained in Comparative Example 10 rises significantly. This shows that the cable flexible comprehensive protective layer of the present application has better softness and fireproof and heat-insulating effects than the commercially available whole-blanket-type cable explosion-proof blanket.

[0096] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A flexible integrated protective layer for cables, characterized in that: From the outside to the inside, it includes an anti-corrosion layer and an insulating and heat-insulating layer, a plurality of rectangular cavities are formed between the anti-corrosion layer and the insulating and heat-insulating layer, the cavities are filled with a fireproof, heat-insulating and explosion-proof material layer, and a fireproof rope is arranged on the anti-corrosion layer; The fireproof, heat-insulating and explosion-proof material layer is composed of a fireproof layer, a heat-insulating layer and an explosion-proof layer from the outside to the inside; The fireproof layer is a high-aluminum fire-resistant fiber layer; the thermal insulation layer is an aerogel felt layer; and the explosion-proof layer is an aluminum foil layer; The thickness of the fireproof, heat-insulating and explosion-proof material layer is 26.3-37 mm; The width of the cavity is 36.3-47 mm.

2. The cable flexible integrated protective layer according to claim 1, characterized in that: The anti-corrosion layer is a high-silica fire-retardant coating cloth layer.

3. The cable flexible integrated protective layer according to claim 1 is characterized in that: The insulating and heat-insulating layer is a high-silica fireproof cloth layer.

4. The cable flexible integrated protective layer according to claim 1, characterized in that: The fireproof rope is a high-performance aramid steel wire reinforced sewing thread.

5. The method for preparing the flexible integrated protective layer for cables according to any one of claims 1 to 4, characterized in that: The method comprises the following preparation steps: S1: overlapping the explosion-proof layer, the thermal insulation layer and the fireproof layer in sequence to obtain a fireproof, thermal insulation and explosion-proof material layer; S2: Fill the fireproof, heat-insulating and explosion-proof material layer into the rectangular cavity formed by the anti-corrosion layer and the insulating and heat-insulating layer, and sew the cavity into a closed cavity to obtain a semi-finished product; then, sew the fireproof rope at both ends of the semi-finished product in the width direction to obtain a flexible comprehensive protective layer for the cable.

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