CN-119811763-B - Dampproof and explosion-proof cable and preparation method thereof

CN119811763BCN 119811763 BCN119811763 BCN 119811763BCN-119811763-B

Abstract

The invention provides a moistureproof and explosion-proof cable and a preparation method thereof, and relates to the technical field of cables. The moistureproof and explosion-proof cable comprises a cable core formed by winding a plurality of conductive cores in the same direction, wherein an insulating shielding layer is sleeved on the outer side of the cable core, a filling layer is formed on the outer side of the insulating shielding layer, a plurality of armor layers are arranged on the outer side of the filling isolation layer, a protection layer is filled among the armor layers, a cable sheath is sleeved on the armor layer positioned on the outermost layer, and a heat-conducting flame-retardant body is arranged in the protection layer and is a carbon matrix with aluminum hydroxide nano particles doped on the surface. The invention can improve the moistureproof and explosion-proof performance of the cable.

Inventors

YANG LIFENG
YI JIANCHANG
JI JIQIANG
XIE XIAQING
GAO PENG
Li Fushenbao

Assignees

青海聚智龙线缆科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250123

Claims (9)

1. A moistureproof and explosion-proof cable is characterized by comprising a cable core formed by winding a plurality of strands of conductive cores in the same direction, wherein an insulating shielding layer is sleeved on the outer side of the cable core, a filling layer is formed on the outer side of the insulating shielding layer, a plurality of armor layers are arranged on the outer side of the filling layer, a protection layer is filled among the armor layers, the armor layer positioned on the outermost layer is sleeved with a cable sheath, a heat-conducting flame-retardant body is arranged in the protection layer, the heat-conducting flame-retardant body is a carbon matrix with aluminum hydroxide nano particles doped on the surface, the preparation method of the heat-conducting flame-retardant body comprises the steps of carrying out surface activation on the carbon matrix in a silane solution to obtain an activated matrix, carrying out ultrasonic mixing on the activated matrix in an aluminum ion solution containing a surfactant to obtain a mixed suspension, dropwise adding an alkaline solution into the mixed suspension, carrying out ultrasonic reaction, separating to obtain a modified intermediate, and carrying out melamine modification on the surface of the modified intermediate.
2. The moisture and explosion proof cable of claim 1, wherein the silane solute in the silane solution comprises KH550, KH792 or KH602, and/or the mass ratio of silane solute to carbon matrix in the silane solution is (0.3-0.5): 1, and/or the carbon matrix comprises single-walled carbon nanotubes or multi-walled carbon nanotubes, and/or the carbon matrix is surface activated within a silane solution of 40-50 ℃, and/or the carbon matrix is mechanically mixed within a silane solution for surface activation, the mechanical mixing comprising mechanical stirring, ultrasound or shaking.
3. The moisture-proof and explosion-proof cable according to claim 1, wherein the surfactant comprises KH550, KH792 or KH602, and/or the mass ratio of aluminum ions in the aluminum ion solution to the activated matrix is (0.5-0.8): 1, and/or the mass ratio of the surfactant to the activated matrix is (0.01-0.03): 1, and/or the activated matrix is preheated at 40-60 ℃ in advance, and/or the activated matrix is mixed in the aluminum ion solution containing the surfactant at an ultrasonic frequency of 10kHz-30 kHz.
4. The moisture and explosion proof cable of claim 1, wherein the alkali solution comprises sodium hydroxide or potassium hydroxide, and/or wherein the alkali solution is added dropwise to the mixed suspension at a rate of 30-50 drops/min, and/or wherein the alkali solution is added dropwise to the mixed suspension for ultrasonic reaction at 50-60 ℃.
5. The moistureproof and explosion-proof cable according to claim 1, wherein the modified intermediate is stirred and mixed in a melamine solution, then is subjected to standing separation and drying to obtain a heat-conducting flame retardant body, wherein the mass ratio of the modified intermediate to melamine solute in the melamine solution is 1 (0.1-0.3), and/or the solvent of the melamine solution comprises dimethylformamide, and/or the modified intermediate is stirred and mixed in the melamine solution at 40-50 ℃.
6. The moistureproof and explosion-proof cable according to claim 1, wherein the protective layer comprises, by mass, 8% -12% of a heat-conducting flame retardant body, 5% -8% of a functional auxiliary agent and the balance of an elastomer, wherein the elastomer comprises a styrene elastomer or a polyolefin elastomer, and the functional auxiliary agent comprises an antioxidant, a lubricant and a plasticizer.
7. The moisture and explosion proof cable of claim 6, wherein the antioxidant is antioxidant 1010, and/or the lubricant is stearate, and/or the plasticizer comprises one of dioctyl phthalate and dibutyl phthalate, and/or the styrene elastomer is one of SBS and SEBS.
8. The moistureproof and explosion-proof cable according to claim 1, wherein the cable sheath comprises a polyvinyl chloride matrix and a heat-conducting flame-retardant body, and the mass fraction of the heat-conducting flame-retardant body is 10% -25%.
9. A method for preparing the moistureproof and explosion-proof cable according to any one of claims 1 to 8, which is characterized by comprising the steps of winding a plurality of conductive cores in the same direction and synchronously weaving an insulating shielding layer to obtain a wire core, extruding a filling layer outside the wire core to obtain a primary wire, sequentially covering an armor layer and a protective layer outside the primary wire to obtain a middle-grade wire, and hot-melting and extruding a cable sheath outside the middle-grade wire to obtain the moistureproof and explosion-proof cable.

Description

Dampproof and explosion-proof cable and preparation method thereof Technical Field The invention relates to the technical field of cables, in particular to a moistureproof and explosion-proof cable and a preparation method thereof. Background In many industrial fields such as petrochemical industry, coal mining, natural gas transportation and the like, the production environment is extremely complex, a large amount of flammable and explosive gas exists, and serious threat is caused to the safety and stability of the power transmission cable, for example, when the power transmission cable is in a humid environment for a long time, the water in the environment permeates into a cable sheath to easily cause discharge, and the explosion of the gas in the environment is caused, so that production accidents are caused. Therefore, the dampproof and explosion-proof cable becomes important equipment for ensuring the safe and orderly production activities, not only maintains the normal operation of each electric equipment, but also is an important line for ensuring the personnel safety and the complete damage of production facilities, and if the performance of the dampproof and explosion-proof cable is insufficient, the loss caused by the dampproof and explosion-proof cable is difficult to measure. The current dampproofing explosion-proof cable that uses is metal conductor, insulating layer, dampproof course and explosion-proof armor from interior to exterior in proper order, and wherein metal conductor is used for conduction current as the core passageway of electric current transmission, and the insulating layer is then insulating protection to metal conductor, avoids the electric leakage to appear in metal conductor, and dampproof course and explosion-proof armor are then protecting the insulating layer, avoid the insulating layer to break and lead to dampproofing explosion-proof cable electric leakage, dampproofing course and explosion-proof armor play dampproofing and explosion-proof effect respectively in addition, and the armor can rely on its metallic structure to improve dampproofing explosion-proof cable's structural strength. However, although the moisture-proof and explosion-proof cable improves moisture-proof performance by providing a moisture-proof layer, moisture easily permeates into the surface when the cable is used in a high humidity environment for a long period of time, and particularly, moisture permeation easily occurs when the cable is subjected to external pressure or when defects such as folds, damages and the like occur in the surface during installation, thereby causing a decrease in insulation performance and affecting the morphological integrity of an armor layer inside the cable, thereby causing arc discharge and increasing explosion risk during the use of the cable, and thus, there is a need for providing a solution to improve the above problems. Disclosure of Invention The invention aims to provide a moistureproof and explosion-proof cable and a preparation method thereof. The moistureproof and explosion-proof cable comprises a cable core formed by winding a plurality of conductive cores in the same direction, wherein an insulating shielding layer is sleeved on the outer side of the cable core, a filling layer is formed on the outer side of the insulating shielding layer, a plurality of armor layers are arranged on the outer side of the filling isolation layer, a protection layer is filled among the armor layers, a cable sheath is sleeved on the armor layer positioned on the outermost layer, and a heat-conducting flame-retardant body is arranged in the protection layer and is a carbon matrix with aluminum hydroxide nano particles doped on the surface. According to the moistureproof and explosion-proof cable, the plurality of armor layers are arranged, the protective layers are arranged between the adjacent armor layers, so that the overall structural strength and mechanical strength of the cable can be effectively improved, the defects of crease, breakage and the like of the cable in the use process are prevented, meanwhile, the protective layers can well absorb impact to protect the armor layers, and heat generated in the use process of the cable can be timely conducted by the heat-conducting flame retardant in the protective layers, so that heat accumulation is avoided. The preparation method of the heat-conducting flame-retardant body comprises the steps of carrying out surface activation on a carbon matrix in a silane solution to obtain an activated matrix, carrying out ultrasonic mixing on the activated matrix in an aluminum ion solution containing a surfactant to obtain a mixed suspension, dropwise adding an alkali solution into the mixed suspension, carrying out ultrasonic reaction, separating to obtain a modified intermediate, and carrying out melamine modification on the surface of the modified intermediate to obtain the heat-conducting flame-retardant body. Optionally, the s