CN117198607B - Rat-proof cable and production method thereof - Google Patents

Rat-proof cable and production method thereof Download PDF

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Publication number
CN117198607B
CN117198607B CN202311231939.4A CN202311231939A CN117198607B CN 117198607 B CN117198607 B CN 117198607B CN 202311231939 A CN202311231939 A CN 202311231939A CN 117198607 B CN117198607 B CN 117198607B
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cable
layer
conductive
rat
proof
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CN117198607A (en
Inventor
何云平
潘泽国
余琳玲
钟广尧
林建清
黄展滔
张锐斌
李浩华
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Guangdong New Yaguang Cable Co ltd
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Guangdong New Yaguang Cable Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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Abstract

The invention relates to the technical field of electricity utilization material production, and discloses a rat-proof cable and a production method thereof; the rat-proof cable is composed of a cable core group positioned in the center of the cable, and a base layer, a conductive induction film, a protective layer and a waterproof layer which are sequentially arranged from inside to outside. The wire core group is formed by twisting and filler adhesion, the base layer and the protective layer are extruded and coated by an extruder, the conductive induction film is paid off and coated by wire feeding equipment, and the waterproof layer is coated by a coating technology. When the protective layer of the cable is slightly damaged, the protective layer material has self-repairing property, so that the cable can be self-repaired after a certain time; when the protective layer is bitten by mice and reaches the inner conductive sensing film, the conductive layer of the conductive sensing film generates micro-current to stimulate and drive the mice, and the damage degree of the cable is judged and the damage position is determined through the inner pressure sensing assembly and an outer measuring circuit.

Description

Rat-proof cable and production method thereof
Technical Field
The invention relates to the technical field of electricity utilization material production, in particular to a rat-proof cable and a production method thereof.
Background
Cables are an integral part of modern electrical and telecommunications systems, and they are widely used for the transmission of power and data. However, in practical applications, the cable is often bitten by rodents such as rats, which not only causes damage to the cable, but also may cause safety accidents. Therefore, developing a cable with a rat-proof function is an important subject in the current cable production field.
Conventional ratproof cables are usually provided with a metal sheath or additives on the outside of the cable to increase the hardness of the cable, thereby preventing biting of the rats. However, these methods have some problems. For example, metal jackets increase the weight and cost of the cable and the installation process is complex; the additives may affect the electrical properties of the cable and it is difficult to ensure the protection against rodents.
According to the technical scheme disclosed in the publication No. CN104109305B, a rat-proof polyvinyl chloride cable material and a preparation method thereof are provided, wherein the cable material is added with a material with flame retardance and rat-proof performance, so that the cable generates rat-repellent smell, has excellent flame retardance and has better low smoke and low toxicity characteristics; the technical proposal with the publication number of JP2007042530A proposes a rat-proof cable, which is characterized in that a layer of stainless steel mesh belt is added in a cable sheath material, so that the cable is difficult to be scratched by rats to protect the cable; the technical scheme of publication number WO2021082687A1 proposes an all-dielectric central beam tube type rat-proof, termite-proof and lightning-proof optical cable, which improves the protection effect of the cable by adding three sheath layers and one glass fiber yarn layer inside the cable.
The above technical solutions all propose various reinforced cables or prevent mice from biting the cable by adding substances with mouse-repelling taste into the cable material, however, too many protective layers make the cost of the cable obviously raised, and the odors added into the materials are easy to dissipate over time and easily affect the surrounding environment. Therefore, some technical solutions of the rat-proof cable which is more efficiently used are required to be proposed.
The foregoing discussion of the background art is intended to facilitate an understanding of the present invention only. This discussion is not an admission or admission that any of the material referred to was common general knowledge.
Disclosure of Invention
The invention aims at providing a rat-proof cable and a production method thereof; the rat-proof cable is composed of a cable core group positioned in the center of the cable, and a base layer, a conductive induction film, a protective layer and a waterproof layer which are sequentially arranged from inside to outside. The wire core group is formed by twisting and filler adhesion, the base layer and the protective layer are extruded and coated by an extruder, the conductive induction film is paid off and coated by wire feeding equipment, and the waterproof layer is coated by a coating technology. When the protective layer of the cable is slightly damaged, the protective layer material has self-repairing property, so that the cable can be self-repaired after a certain time; when the protective layer is bitten by mice and reaches the inner conductive sensing film, the conductive layer of the conductive sensing film generates micro-current to stimulate and drive the mice, and the damage degree of the cable is judged and the damage position is determined through the inner pressure sensing assembly and the outer sensing circuit.
The invention adopts the following technical scheme:
a rat-proof cable 1, the rat-proof cable 1 comprising, in order from the outside to the inside:
a protective layer including, but not limited to, a material derived from an acrylate copolymer, polyurethane, silicone rubber, or mixtures thereof, and including carbon black as a filler to enhance the physical properties of the protective layer; the thickness of the protective layer is 0.6mm plus or minus 0.1mm; the protective layer is used for automatically sealing and repairing a damaged area when the protective layer is subjected to external physical damage through free flow of materials;
the conductive sensing film is used for sensing the pressure applied to the cable, and the conductive sensing film is coupled to a measuring circuit arranged outside the cable or embedded in the cable so as to realize the measurement of the real-time state and the real-time change of the electric parameter of the conductive sensing film to determine the specific position of the cable subjected to the external pressure; and further, by applying a voltage to the conductive sensing film, when the external living things contact the conductive sensing film, corresponding current is generated in the external living things under the action of the voltage, so that the external living things are stimulated and retreated;
the base layer is used for wrapping and fixing the wire cores positioned in the base layer; and a filler is filled between the base layer and the wire cores and used for stabilizing one or more wire cores in the base layer and buffering the physical pressure outside the cable;
wherein the base layer is made of insulating materials;
the conductive induction film comprises a conductive layer, a piezoelectric layer and an electrode layer which are sequentially arranged from outside to inside; the conductive layer is made of a material with high conductivity and is used for generating micro-current which stimulates the external organisms; the piezoelectric layer and the electrode layer form a capacitive pressure sensing assembly for sensing the physical pressure of the cable to the cable outside;
preferably, the conductive induction film is wound outside the base layer in a double spiral manner;
preferably, the base layer material is one or a combination of more than one of insulating glue, mica, asbestos, phenolic resin, epoxy resin and polytetrafluoroethylene;
preferably, the outer surface of the protective layer further comprises a waterproof layer;
preferably, the waterproof layer is a polyurethane waterproof paint layer or an acrylic waterproof paint layer;
preferably, the filler is a fine powder of hydrous magnesium silicate;
preferably, the thickness T of the base layer is related to the maximum outer diameter K of the core group wrapped by the base layer, and the relationship between the thickness T and the maximum outer diameter K is calculated by the following calculation formula:
T＝δ·(-e ε·K +1)·K 0 ；
in the above, delta is the thickness adjustment coefficient, K 0 As the basic outer diameter, epsilon is the thickness increment coefficient, delta, K 0 And epsilon values are set by relevant technicians based on the material of the base material of the rat-proof cable and the actual application scene; and, require ε<-0.1; e is natural logarithm;
preferably, after the rat-proof cable is formed, the piezoelectric constant d33 of the rat-proof cable is 200-500 pC/N;
further, a production method of a rat-proof cable is provided, the production method is applied to the production of the rat-proof cable; the production method comprises the following steps:
s100: preparing materials, mixing and granulating the raw materials of the protective layer and the base layer,
s200: twisting a plurality of wire cores according to the number of the wire cores to form a wire core group, and enabling the surface of the wire core group to be adhered with enough filler through a filler cylinder;
s300: coating the base layer, and extruding the base layer by using an extruder to completely coat the base layer on the wire core group;
s400: the conductive induction film is wrapped, the semi-finished cable in the step S300 is paid off through wire feeding equipment, and the free end of the formed conductive induction film strip coil is wrapped in a double-spiral mode on the periphery of the free end of the semi-finished cable; the electrode layer is wound on the outer side of the base layer in the wrapping process;
s500: coating the protective layer, extruding the protective layer by using an extruder, and completely coating the protective layer on the outer side of the conductive induction film of the cable obtained in the step S400;
s600: coating a waterproof layer;
s700: leading out the pressure sensing component and the conductive layer forming port from the cable section of the S600; the cable was tested for pressure constant and insulation properties.
The beneficial effects obtained by the invention are as follows:
1. the rat-proof cable disclosed by the invention can not only timely stimulate rats to drive when the cable is bitten by adopting the conductive induction film, but also more accurately position and detect the damaged position of the cable by an external detection circuit;
2. the rat-proof cable can effectively improve the rat-proof performance of the cable by accurately controlling the proportional relation between the thickness of the base layer and the maximum thickness of the wire core group; the design can not only prevent the mice from directly biting the wire core, but also adapt to the requirements of preventing mice in different environments through the adjustment of thickness;
3. the rat-proof cable provided by the invention can be self-repaired when being subjected to slight pressure injury or wound by arranging the protective layer with the self-repairing performance, so that the maintenance frequency is effectively reduced;
4. the rat-proof cable provided by the invention has the advantages that the conductive induction film is arranged in a double-screw mode, so that the manufacturing cost is effectively reduced on the basis of ensuring the function.
Drawings
The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Description of sequence number: 1-a rat-proof cable; 10-wire cores; 12-packing; 13-a base layer; 14-a conductive inductive film; 16-a protective layer; 18-a waterproof layer; 22-electrode layer; 24-a piezoelectric layer; 26-a conductive layer;
FIG. 1 is a schematic view of a cross section of a rat-proof cable according to the present invention;
FIG. 2 is a schematic diagram of a conductive sensing film according to an embodiment of the invention;
fig. 3 is a schematic diagram of a double spiral winding of a conductive sensing film in an embodiment of the invention.
Detailed Description
In order to make the technical scheme and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples thereof; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. Other systems, methods, and/or features of the present embodiments will be or become apparent to one with skill in the art upon examination of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description. Included within the scope of the invention and protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if any, the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, this is for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or component to be referred to must have a specific orientation. The terms describing the positional relationship in the drawings are merely for illustrative purposes and are not to be construed as limiting the present patent, and specific meanings of the terms are understood by those of ordinary skill in the art according to specific circumstances.
Embodiment one: as shown in fig. 1, an exemplary rat-proof cable is provided, which comprises, in order from the outside to the inside:
a protective layer 16 including, but not limited to, a material of acrylate copolymer, polyurethane, silicone rubber or mixtures thereof, and including carbon black as a filler to enhance the physical properties of the protective layer; the thickness of the protective layer 16 is 0.6mm + -0.1 mm; the protective layer 16 self-seals and repairs the damaged area when subjected to external physical damage by free flow of material;
a conductive sensing film 14 for sensing pressure applied to the cable and measuring a real-time state and a real-time change of an electrical parameter of the conductive sensing film by coupling the conductive sensing film to a measuring circuit disposed outside or embedded in the cable to determine a specific position of the cable subjected to the external pressure; and further, by applying a voltage to the conductive sensing film, when the external living things contact the conductive sensing film, corresponding current is generated in the external living things under the action of the voltage, so that the external living things are stimulated and retreated;
a base layer 13 for wrapping and fixing the wire core 10 inside the base layer 13; and, a filler 12 is filled between the base layer 13 and the wire core 10, for stabilizing one or more wire cores 10 inside the base layer 13 and buffering physical pressure outside the cable;
wherein, the base layer 13 is made of insulating material;
as shown in fig. 2, the conductive sensing film 14 includes a conductive layer 26, a piezoelectric layer 24, and an electrode layer 22 sequentially arranged from outside to inside; the conductive layer 26 is made of a material with high conductivity for generating micro-current which stimulates the outside organism; the piezoelectric layer 24 and the electrode layer 22 form a capacitive pressure sensing assembly for sensing physical pressure of the cable outside the cable;
preferably, the conductive sensing film 14 is wound outside the base layer 13 in a double spiral manner;
preferably, the material of the base layer 13 is one or more of insulating glue, mica, asbestos, phenolic resin, epoxy resin and polytetrafluoroethylene;
preferably, the outer surface of the protective layer 16 further comprises a waterproof layer 18;
preferably, the waterproof layer 18 is a polyurethane waterproof paint layer or an acrylic waterproof paint layer;
preferably, the filler 12 is a fine powder of hydrous magnesium silicate;
preferably, the thickness T of the base layer 13 is related to the maximum outer diameter K of the core group wrapped by the base layer 13, and the relationship between the two is calculated by the following calculation formula:
T＝δ·(-e ε·K +1)·K 0 ；
in the above, delta is the thickness adjustment coefficient, K 0 As the basic outer diameter, epsilon is the thickness increment coefficient, delta, K 0 And epsilon values are set by relevant technicians based on the material of the base material of the rat-proof cable and the actual application scene; and, require ε<-0.1; e is natural logarithm;
preferably, after the rat-proof cable is formed, the piezoelectric constant d33 of the rat-proof cable is 200-500 pC/N;
by using the base layer 13 as a support for the conductive sensing film 14 on its outer surface, the conductive sensing film 14 can be double-spirally wound in a relatively uniform and stable state;
further, a production method of a rat-proof cable is provided, the production method is applied to the production of the rat-proof cable; the production method comprises the following steps:
s100: preparing materials, mixing and granulating the raw materials of the protective layer and the base layer,
s200: twisting a plurality of wire cores according to the number of the wire cores to form a wire core group, and enabling the surface of the wire core group to be adhered with enough filler through a filler cylinder;
s300: coating the base layer, and extruding the base layer by using an extruder to completely coat the base layer on the wire core group;
s400: the conductive induction film is wrapped, the semi-finished cable in the step S300 is paid off through wire feeding equipment, and the free end of the formed conductive induction film strip coil is wrapped in a double-spiral mode on the periphery of the free end of the semi-finished cable; the electrode layer is wound on the outer side of the base layer in the wrapping process;
s500: coating the protective layer, extruding the protective layer by using an extruder, and completely coating the protective layer on the outer side of the conductive induction film of the cable obtained in the step S400;
s600: coating a waterproof layer;
s700: leading out the pressure sensing component and the conductive layer forming port from the cable section of the S600; the cable was tested for pressure constant and insulation properties.
Embodiment two: this embodiment should be understood to include at least all of the features of any one of the foregoing embodiments, and further improvements thereto:
the piezoelectric layer 24 included in the conductive induction film 14 is a thin film having piezoelectricity;
in some preferred embodiments, the piezoelectric layer 24 is a resin film; the resin in the present embodiment may be one type of resin or a combination of two or more types of resins as long as the resin has piezoelectric characteristics expressed by a piezoelectric constant d 33; examples of the resin satisfying the above conditions include fluororesins, polyamides, celluloses, polyurethanes, polyureas, and the like;
among the above-listed resins, a fluororesin is preferably selected as a main material of the piezoelectric layer; the fluororesin has excellent transparency and piezoelectric characteristics represented by a piezoelectric constant d 33; in the present embodiment, the term "made of a fluororesin" means that the main component of the composition constituting the piezoelectric layer is a fluororesin; the term "fluororesin as a main component" means that the fluororesin is the largest component among the resin components in the composition; the content of the fluororesin in the composition is preferably 51% by mass or more, more preferably 80% by mass or more, particularly preferably 100%;
further, among the fluorine resins, polyvinylidene fluoride resins are preferable; examples of the polyvinylidene fluoride resin include polyvinylidene fluoride homopolymers and copolymers thereof; the content of the structural unit derived from a monomer other than polyvinylidene fluoride in the polyvinylidene fluoride copolymer can be appropriately determined within a range in which the piezoelectric layer exhibits characteristics according to the use thereof; examples of the monomer other than vinylidene fluoride in the vinylidene fluoride copolymer include hydrocarbon monomers and fluorine compounds; examples of hydrocarbon monomers include fluoromonomers such as Vinyl Fluoride (VF), trifluoroethylene (TrFE), tetrafluoroethylene (TeFE), hexafluoropropylene (HFP), 1-chloro-1-fluoro-ethylene (1, 1-CFE), 1-chloro-2-fluoro-ethylene (1, 2-CFE), 1-chloro-2, 2-difluoroethylene (CDFE), chlorotrifluoroethylene (CTFE), trifluoroethylene monomers, perfluoroalkyl vinyl ethers, perfluoromethyl vinyl ethers (PMVE), perfluoropropyl vinyl ethers (PPVE), perfluoro acrylates, 2-trifluoroethyl acrylate, 2- (perfluorohexyl) ethyl acrylate; and ethylene, propylene, maleic anhydride, vinyl ethers, vinyl esters, allyl glycidyl ether, acrylic monomers, methacrylic monomers, and hydrocarbon monomers such as vinyl acetate; among these monomers other than polyvinylidene fluoride in the copolymer, trifluoroethylene, tetrafluoroethylene, and hexafluoropropylene are preferable;
alternatively, the polyvinylidene fluoride copolymer includes a copolymer of polyvinylidene fluoride and trifluoroethylene, a polyvinylidene fluoride copolymer (VDF/TrFE), and a copolymer of polyvinylidene fluoride and hexafluoropropylene.
(VDF/HFP) or polyvinylidene fluoride copolymer (VDF/TeFE) obtained by copolymerizing polyvinylidene fluoride with tetrafluoroethylene; the binary copolymer preferably has a mixing ratio of polyvinylidene fluoride to comonomer of 50:50 to 90:10; for example, a polyvinylidene fluoride copolymer (VDF/TeFP) obtained by copolymerizing polyvinylidene fluoride and tetrafluoroethylene at a mixing ratio of 80:20; in addition, a terpolymer such as polyvinylidene fluoride copolymer (VDF/TFE/HFP) in which polyvinylidene fluoride, trifluoroethylene and hexafluoropropylene are copolymerized in a mixing ratio of 40:40:20;
the piezoelectric layer of the present embodiment may contain various additives as long as the effects of the present embodiment can be obtained; such additives may be a combination of one or more, examples of which include plasticizers, lubricants, crosslinking agents, ultraviolet absorbers, pH adjusters, stabilizers, antioxidants, surfactants, and pigments;
in a preferred embodiment, the thickness of the piezoelectric layer 24 may be appropriately determined in accordance with the use of the cable within a range where the effect of the present embodiment can be obtained; if the thickness of the piezoelectric layer 24 is too thin, the mechanical strength may be insufficient, while if it is too thick, the cost to the cable is too high, or it causes excessive hardness or affects deformation thereof; based on this, the thickness of the piezoelectric layer 24 may be 20 μm or more, preferably 30 μm or more, more preferably 35 μm or more; the thickness of the piezoelectric layer 24 is preferably 80 μm or less;
further, in a preferred embodiment, the electrode layer 22 is a structure having planar expansion and conductivity; the electrode layer 22 may be composed of a conductive member or have a composition including a conductive member, which may have an extremely thin or extremely fine structure;electrode layer 22May be formed on a substrate, and may be adhered to one side of the piezoelectric layer 24 together with the substrate; the electrode layer 22 need only be disposed on at least one side of the piezoelectric layer;
the material constituting the electrode layer 22 is not limited, and may be selected from a metal oxide of one metal preferably used in In, sn, zn, ga, sb, ti, si, zr, mg, al, au, ag, cu, pd; for example, ITO, zinc oxide, antimony tin composite oxide (ATO), or the like is preferably used, and ITO is particularly preferably used; the metal oxides may be doped with the metal atoms listed in the above group, if desired; in a preferred embodiment, the material of the electrode layer 22 is indium tin composite oxide; in another preferred embodiment, the electrode layer 22 is made of indium tin composite oxide;
and preferably, the thickness of the electrode layer 22 may be 13nm or more, preferably 15nm or more, more preferably 20nm or more; if the thickness of the electrode layer 22 is too thin, there is a risk that the resistance of the conductive sensing film 14 increases, and there is also a risk that a discontinuous portion is formed in the electrode layer 22; by ensuring that the thickness of the electrode layer 22 is not less than the above lower limit, the transparent conductive film 14 can be made into a monolithic continuous film having a surface resistance value of less than 480 Ω/sq and good conductivity; in particular, the thickness of the electrode layer 22 is preferably 20nm or more; by setting the thickness of the electrode layer 22 to 20nm or more, a more suitable conductive film having a surface resistance value of less than 300 Ω/sq can be obtained; on the other hand, the thickness of the electrode layer 22 is preferably less than 40nm, preferably less than 38nm, more preferably less than 35nm; if the thickness of the electrode layer 22 becomes too thick, it is also possible to cause an additional increase in cost and to reduce the softness of the cable;
further, in an exemplary embodiment, the conductive layer 26 may be an alloy foil containing a conductive medium; the thickness of the alloy foil may be between 0.1 and 0.3 mm; the voltage applied to the conductive layer 26 may be set at 36v±4v so as to cause a certain stimulus pain to the mice;
preferably, in measuring the thickness of each layer of the conductive sensing film 14, embedding the conductive sensing film 14 in epoxy resin, and cutting the epoxy resin block so that the cross section of the transparent conductive film is exposed; the cross section of the exposed conductive sensing film 14 and the remaining coatings including the cable were observed using a scanning electron microscope at an acceleration voltage of 3.0kV and a magnification of 50,000 times to measure the actual thickness of each layer; in addition, when the actual thickness of each layer of the cable is measured, any two separated positions are selected for measurement, and the average value of the measured values obtained by each layer is calculated as the thickness of each layer;
preferably, the double winding is adopted, and two winding units are adopted to perform double spiral winding of the conductive induction film 14 on the semi-finished cable wrapped with the base layer 13; the conductive sensing film 14 after forming is shown in fig. 3; after the conductive induction film 14 is wound, the conductive induction film 14 is attached to the outer side of the base layer by adopting a heating, pressurizing and curing mode;
by arranging the conductive sensing film 14 in a double-spiral mode, the consumption of the conductive sensing film 14 can be saved by about 50%, and the conductive sensing film 14 is prevented from being broken under abrupt pulling when the cable is greatly bent;
in some preferred embodiments, access to the measurement circuitry may be provided at fixed length intervals of the cable for monitoring the condition of injury to the conductive sensing film 14 within its measurement range;
in some preferred embodiments, the current for stimulation can be generated by supplying a suitable operating voltage to the conductive layer by externally accessing a power supply or taking electricity from a cable; moreover, the on-off of the input voltage can be controlled by adopting an activating circuit mode; when the cable is perceived to be damaged externally, a voltage is input to the conductive layer.
Embodiment III: this embodiment should be understood to include at least all of the features of any one of the foregoing embodiments, and further improvements thereto:
in some preferred embodiments, the material of the protective layer comprises a material prepared by mixing bisphenol A compound (2-hydroxy-3-methacryloxypropyl) and dioxyethyl disulfide (2-methacryloyl) in a mass fraction of 50:50 or 40:60; additionally, a blend of glycidyl dimethacrylate and triethylene glycol dimethacrylate can be used as a reference for a sample containing no disulfide bond;
the above formulation activates visible light polymerization by adding 0.7wt% Camphorquinone (CQ) and 0.32wt% dimethylaminoethyl methacrylate (DMAEMA); CQ and DMAEMA are a pair of commonly used photoinitiators and co-initiators that can initiate free radical polymerization in an inorganic solvent by absorbing visible light, thereby accelerating the polymerization of the blend;
alternatively, in some preferred embodiments, the protective layer is made of bisphenol A glycidyl ether resin (DGEBA, epoxy value 0.51), methyl hexahydrophthalic anhydride (MHHPA, 99%), triethanolamine (TEOA, 99.9%), 3' -dithiodipropionic acid (DTDPA, 99.9%), and Ethylene Glycol (EG),
99.9%); the DGEBA, MHHPA and TEOA were thoroughly mixed in a stirrer at 80℃for 15 minutes; pouring the mixture into a mold, vacuum drying at 80deg.C for 15min to remove all bubbles, heating at 110, 130 or 150deg.C for 3 hr, and DSC to optimize curing temperature; after curing, a single epoxy glass resin Vicarrier-0%S-S containing only dynamic ester bonds was obtained, after which the starting material was carried out to produce the protective layer.
While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That is, the methods, systems and devices discussed above are examples. Various configurations may omit, replace, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in a different order than described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. Furthermore, as the technology evolves, elements therein may be updated, i.e., many of the elements are examples, and do not limit the scope of the disclosure or the claims.
Specific details are given in the description to provide a thorough understanding of exemplary configurations involving implementations. However, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring configurations. This description provides only an example configuration and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configuration will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is intended that it be regarded as illustrative rather than limiting. Various changes and modifications to the present invention may be made by one skilled in the art after reading the teachings herein, and such equivalent changes and modifications are intended to fall within the scope of the invention as defined in the appended claims.

Claims (9)

1. The utility model provides a protection against rodents cable which characterized in that, protection against rodents cable includes from outside to inside in proper order:
a protective layer made of an acrylate copolymer, polyurethane, silicone rubber or a mixture thereof as a raw material, and carbon black as a filler to enhance physical properties of the protective layer; the thickness of the protective layer is 0.6mm plus or minus 0.1mm;
the conductive sensing film is used for sensing the pressure applied to the cable, and the conductive sensing film is coupled to a measuring circuit arranged outside the cable or embedded in the cable so as to realize the measurement of the real-time state and the real-time change of the electric parameter of the conductive sensing film to determine the specific position of the cable subjected to the external pressure; and further, by applying a voltage to the conductive sensing film, when the external living things contact the conductive sensing film, corresponding current is generated in the external living things under the action of the voltage, so that the external living things are stimulated and retreated;
the base layer is used for wrapping and fixing the wire cores positioned in the base layer; and a filler is filled between the base layer and the wire cores and used for stabilizing one or more wire cores in the base layer and buffering the physical pressure outside the cable;
wherein the base layer is made of insulating materials;
the conductive induction film comprises a conductive layer, a piezoelectric layer and an electrode layer which are sequentially arranged from outside to inside; the conductive layer is made of a material with high conductivity and is used for generating micro-current which stimulates the external organisms; the piezoelectric layer and the electrode layer form a capacitive pressure sensing assembly for sensing physical pressure of the cable to the cable.
2. The rat-proof cable of claim 1 wherein the conductive sensing film is wound in a double spiral fashion around the outside of the substrate.
3. The rat-proof cable of claim 2, wherein the base material is one or a combination of more than one of an insulating glue, mica, asbestos, phenolic resin, epoxy resin, and polytetrafluoroethylene.
4. A rat-proof cable according to claim 3, wherein the protective layer outer surface further comprises a water-repellent layer coated thereon.
5. The rat-proof cable of claim 4 wherein the water-proof layer is a polyurethane water-proof coating or an acrylic water-proof coating.
6. The rat-proof cable of claim 5 wherein the filler is a finely divided powder of hydrous magnesium silicate.
7. The rat-proof cable of claim 6, wherein the thickness T of the base layer is related to the maximum outer diameter K of the core group surrounded by the base layer, the relationship being calculated by the following equation:
；
in the above, delta is the thickness adjustment coefficient, K 0 As the basic outer diameter, epsilon is the thickness increment coefficient, delta, K 0 And epsilon values are set by relevant technicians based on the material of the base material of the rat-proof cable and the actual application scene; and, require ε<-0.1; e is natureLogarithmic.
8. The rat-proof cable of claim 7, wherein the rat-proof cable has a piezoelectric constant d33 of 200 to 500pC/N after being formed.
9. A method of producing a rat-proof cable, characterized in that the method of production is applied to the production of a rat-proof cable according to one of claims 1 to 8; the production method comprises the following steps:
s100: preparing materials, mixing and granulating the raw materials of the protective layer and the base layer,
s200: twisting a plurality of wire cores according to the number of the wire cores to form a wire core group, and enabling the surface of the wire core group to be adhered with enough filler through a filler cylinder;
s300: coating the base layer, and extruding the base layer by using an extruder to completely coat the base layer on the wire core group;
s400: the conductive induction film is wrapped, the semi-finished cable in the step S300 is paid off through wire feeding equipment, and the free end of the formed conductive induction film strip coil is wrapped in a double-spiral mode on the periphery of the free end of the semi-finished cable; the electrode layer is wound on the outer side of the base layer in the wrapping process;
s500: coating the protective layer, extruding the protective layer by using an extruder, and completely coating the protective layer on the outer side of the conductive induction film of the cable obtained in the step S400;
s600: coating a waterproof layer;
s700: leading out the pressure sensing component and the conductive layer forming port from the cable section of the S600; the cable was tested for pressure constant and insulation properties.
CN202311231939.4A 2023-09-22 2023-09-22 Rat-proof cable and production method thereof Active CN117198607B (en)

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JP2007042530A (en) * 2005-08-05 2007-02-15 Yazaki Corp Rat proof cable
CN104109305A (en) * 2014-06-23 2014-10-22 安徽荣玖光纤通信科技有限公司 Anti-rat-type PVC cable material and preparation method
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CN217361162U (en) * 2022-03-10 2022-09-02 江苏天诚智能集团有限公司 Environment-friendly ratproof cable

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