CN116705389B - Eighteen-lead electrocardiograph monitoring main cable and manufacturing method thereof - Google Patents
Eighteen-lead electrocardiograph monitoring main cable and manufacturing method thereof Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses an eighteen-lead electrocardiograph monitoring main cable and a manufacturing method thereof, comprising the following steps: the cable comprises a single shielding signal transmission unit, a double shielding signal transmission unit and two control units, wherein a first PTFE (polytetrafluoroethylene) wrapping belt is wrapped on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units which form a cable, a sheath is extruded on the first PTFE wrapping belt, and a net-shaped tearing rope coated with long-acting antistatic liquid, a second cotton rope and an antistatic filling assembly are filled in the first PTFE wrapping belt; when manufacturing the single shielding signal transmission unit and the double shielding signal transmission unit, long-acting antistatic liquid needs to be coated on the first insulating wire core, the second aramid fiber monofilament and the third cotton rope. Different conductor materials and insulating materials can be adopted according to different monitoring positions, so that excellent electrical performance of each unit is ensured, transmission performance is stable, and meanwhile, cost is saved. The cable has excellent antistatic performance and anti-interference performance, and ensures the quality of the signal transmission process.
Description
Technical Field
The invention relates to the field of cables, in particular to an eighteen-lead electrocardiograph monitoring main cable and a manufacturing method thereof.
Background
Before the heart beats, the cardiac muscle is excited first, and weak current is generated during excitation, and the current is conducted to various parts through human tissue. Because the tissues of each part of the body are different, the distances between each part and the heart are different, so that the electric current can show different electric potential changes at each part of the body surface of the human body, and the relationship between the surface electric potential generated by the electric activity in the heart of the human body and time is called an electrocardiogram. Electrocardiographs are instruments that record these physiological electrical signals. Along with the progress of scientific technology, the electrocardiograph commonly used at present has nine-lead state electrocardiographs, twelve-lead state electrocardiographs, fifteen-lead state electrocardiographs and eighteen-lead state electrocardiographs, and through evaluation statistics of the four electrocardiographs, the eighteen-lead state electrocardiographs have the advantages of synchronous acquisition, synchronous measurement, synchronous analysis and synchronous printing, and are fully compatible with fifteen-lead, twelve-lead and nine-lead acquisition modes. The eighteen-lead dynamic electrocardiogram diagnosis of cardiovascular diseases has the advantages of remarkable effect, higher accuracy, sensitivity and specificity, simple operation, convenience, rapidness and high safety, is an optimal detection means for diagnosing cardiovascular diseases at present, and has obvious advantages and is worthy of wide clinical implementation.
In order to adapt to an eighteen-lead state electrocardiogram, and ensure that the eighteen-lead state electrocardiogram can realize high-quality electrocardiosignal acquisition, and provide accurate and stable electrocardio waveforms, the corresponding main cable is required to have the advantages of excellent data transmission performance, high temperature resistance, high shielding performance, static resistance, low noise, high bending strength, high tensile strength, durability, excellent ageing resistance and the like, the currently commonly used main cable is provided with the advantages of improving the corrosion resistance and oxidation resistance of the cable by adopting a tinned conductor or a silver-plated conductor, then the electrical transmission performance of the cable is ensured by PVC insulation, the softness of the cable is increased by filling cotton ropes, the anti-interference problem of the cable is solved by adopting tinned copper wire braiding shielding in a PVC sheath, and the softness and the environmental resistance of the cable are solved by adopting the PVC sheath. But the difference of the conductivity of each element in the cable cannot be controlled according to different interfaces, and the problems that the service life of the cable is influenced by heating of the cable caused by electromagnetic interference among main cable elements, antistatic problem in the using process of the cable, medical noise and high temperature generated in the using process of equipment cannot be well solved, so that the service life of an electrocardiograph is short, signal transmission is unstable, the variation difference of electrocardiograph wave deformation is large, and the diagnosis effect is influenced.
Disclosure of Invention
The invention aims to provide an eighteen-lead electrocardiograph monitoring main cable and a manufacturing method thereof, wherein the manufactured main cable can be used for adapting to different interfaces of an electrocardiogram by using units with different electrical properties and shielding properties, and the problems of electromagnetic interference among the units, cable static resistance and the like can be solved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: eighteen-lead electrocardiograph monitoring main cable, comprising: the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units are respectively abutted against two sides of the double shielding signal transmission unit, the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units are twisted into a cable, net-shaped tearing ropes are filled between the single shielding signal transmission unit and the two control units, a second cotton rope is respectively filled between the double shielding signal transmission unit and the two control units, long-acting antistatic liquid is coated on the net-shaped tearing ropes and the second cotton rope, antistatic filling components are filled among the single shielding signal transmission unit, the double shielding signal transmission unit, the control units and the net-shaped tearing ropes, a first PTFE wrapping belt is wrapped on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units which form the cable, and a sheath is extruded on the first PTFE wrapping belt;
The single shielding signal transmission unit includes: the cable comprises a first conductor, a first insulating layer, a second PTFE tape, a first winding shielding layer and a third PTFE tape, wherein the first conductor is formed by twisting a plurality of tinned copper wires, the first conductor is extruded with the first insulating layer to form a first insulating wire core, the first insulating wire core is coated with long-acting antistatic liquid, the three first insulating wire cores are twisted into a cable, three second aramid filaments are filled among the three first insulating wire cores which are formed into a cable, the second aramid filaments are coated with long-acting antistatic liquid, the three first insulating wire cores which are formed into a cable are wound with one layer of second PTFE tape, the second PTFE tape is wound with the first winding shielding layer, and the first winding shielding layer is wound with one layer of third PTFE tape;
the double-shielded signal transmission unit includes: the second conductor is formed by twisting a plurality of silver-plated copper wires, the second conductor is extruded with a second insulating layer to form a second insulating wire core, the second insulating wire core is coated with long-acting antistatic liquid, two second insulating wire cores are twisted into a cable, two third cotton ropes are filled between the two second insulating wire cores of the cable, the third cotton ropes are coated with long-acting antistatic liquid, the two second insulating wire cores of the cable are wound with two layers of fourth PTFE tape, the fourth PTFE tape positioned on the outer side is wound with an aluminum-plastic composite tape, the second winding shielding layer is wound on the aluminum-plastic composite tape, the second winding shielding layer is connected with the aluminum surface of the aluminum-plastic composite tape in a conducting manner, and the fifth PTFE tape is wound on the second winding shielding layer;
The control unit includes: the cable comprises a third conductor and a third insulating layer, wherein the third conductor is formed by twisting a plurality of silver-plated copper wires, the third insulating layer is extruded on the third conductor to form a third insulating wire core, and seven third insulating wire cores are twisted into a cable in a 1+6 structure.
Further, the foregoing eighteen-lead electrocardiograph monitoring main cable, wherein the antistatic filling component comprises: the two first cotton ropes and the four first aramid filaments are twisted into a twisted rope in a two-to-two mode, the two twisted ropes are twisted with the two first cotton ropes, and the first cotton ropes and the first aramid filaments are coated with long-acting antistatic liquid.
Further, the eighteen-lead electrocardiograph monitoring main cable is characterized in that the first conductor is formed by concentrically twisting seven tinned copper wires with the diameter of 0.127mm, the first insulating layer is made of PE6006 material, the thickness of the second PTFE wrapping tape is 0.2mm, and the thickness of the third PTFE wrapping tape is 0.1mm.
Further, the eighteen-lead electrocardiograph monitoring main cable is characterized in that the second conductor is formed by concentrically twisting nineteen silver-plated copper wires with the diameter of 0.16mm, the second insulating layer is made of FEP material, the thickness of the fourth PTFE wrapping tape is 0.1mm, and the thickness of the fifth PTFE wrapping tape is 0.05mm.
Further, the eighteen-lead electrocardiograph monitoring main cable is characterized in that the third conductor is formed by twisting seven 0.079mm silver-plated copper wires.
Further, the eighteen-lead electrocardiograph monitoring main cable is characterized in that the thickness of the first PTFE wrapping tape is 0.05mm, and the sheath is made of PUR material.
The manufacturing method of the eighteen-lead electrocardiograph monitoring main cable comprises the following steps:
s1, manufacturing a single shielding signal transmission unit, wherein when a first insulating layer is extruded, the water capacitance value of the first insulating layer is controlled to be 138+/-5 pF/m, the concentricity of the first insulating layer is ensured to be less than or equal to 1.1%, before the first insulating wire core is twisted, the first insulating wire core and the second aramid fiber monofilament are required to pass through a long-acting antistatic solution at 120+/-2 ℃ respectively, and then the first insulating wire core and the second aramid fiber monofilament coated with the long-acting antistatic solution are dried and cooled;
s2, manufacturing a double-shielding signal transmission unit, wherein when a second insulating layer is extruded, the water electrolysis value of the second insulating layer is controlled to be 211+/-5 pF/m, the concentricity of the second insulating layer is ensured to be less than or equal to 1.1%, before the second insulating wire core is twisted, the second insulating wire core and a third cotton rope respectively pass through a long-acting antistatic solution at 120+/-2 ℃, and then the first insulating wire core and the second cotton rope coated with the long-acting antistatic solution are dried and cooled;
S3, manufacturing a control unit, wherein when the third insulating layer is extruded, the concentricity of the third insulating layer is required to be less than or equal to 1.1%, and seven third insulating wire cores are twisted into a cable in a 1+6 structure;
s4, respectively passing the netlike tearing ropes and the third aramid filaments through long-acting antistatic solutions at 120+/-2 ℃, and respectively drying and cooling the netlike tearing ropes and the third aramid filaments coated with the long-acting antistatic solutions;
s5, manufacturing an antistatic filling assembly: respectively passing the first aramid filaments and the first cotton ropes through long-acting antistatic solutions at 120+/-2 ℃, respectively drying and cooling the first aramid filaments and the first cotton ropes coated with the long-acting antistatic solutions, twisting the first cotton ropes in pairs to form twisted ropes, passing the twisted ropes through the long-acting antistatic solutions at 120+/-2 ℃, drying and cooling, twisting the two first cotton ropes and the two groups of twisted ropes to form antistatic filling components, and finally passing the antistatic filling components through the long-acting antistatic solutions at 120+/-2 ℃, and drying and cooling;
s6, carrying out 100% untwisting stress-free twisting on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units by taking the antistatic filler as a center to form a cable, respectively filling a netlike tearing rope coated with a long-acting antistatic solution between the single shielding signal transmission unit and the two control units during twisting, and respectively filling a third aramid monofilament coated with the long-acting antistatic solution between the double shielding signal transmission unit and the two control units;
And S7, wrapping a first PTFE wrapping tape on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units which are formed into a cable, and extruding a sheath on the first PTFE wrapping tape.
Further, the manufacturing method of the eighteen-lead electrocardiographic monitoring main cable is realized by controlling the outer diameter of the first insulating layer or the second insulating layer when controlling the water capacitance in the S1 and the S2.
Further, in the method for manufacturing the eighteen-lead electrocardiograph monitoring main cable, the long-acting antistatic liquid is uniformly mixed with soft water according to the volume ratio of 1:50 by using an antistatic solvent Hecostat 290.
Further, in the manufacturing method of the eighteen-lead electrocardiograph monitoring main cable, the first insulating wire core, the second insulating wire core, each aramid monofilament, each cotton rope and the netlike tearing rope pass through the long-acting antistatic liquid at the speed of 10m/min and then sequentially enter the drying channel and the cooling channel for drying and cooling.
The invention has the advantages that: the single shielding signal transmission unit, the double shielding signal transmission unit and the control unit with different electrical property, shielding property and transmission property requirements can be selected according to the difference of potential changes of the detection part, so that the electrocardiosignal can be accurately collected, the signal transmission quality can be improved, the production cost can be reduced, the transmission quality of the electrocardiosignal can be prevented from being influenced by stray current due to the fact that the single shielding signal transmission unit and the double shielding signal transmission unit are coated with long-acting antistatic liquid, and the antistatic filling component is matched with the reticular tearing rope coated with the long-acting antistatic liquid to reduce signal interference between the single shielding signal transmission unit and the double shielding signal transmission unit and between the single shielding signal transmission unit and the control unit;
Because the electrocardio change intensity of the upper limb is general, the requirements on the electrical property, the signal transmission property and the shielding property of a single shielding signal transmission unit connected with the upper limb are higher, a tinned copper wire is selected to be made into a first conductor in the single shielding signal transmission unit, the production cost can be reduced on the premise that the unit can accurately collect the electrocardiosignal of the upper limb, a first insulating layer made of PE6006 material in the unit can ensure that the unit has excellent electrical property and reduces electric energy loss, the stable signal transmission and the stable signal transmission quality are ensured, a first winding shielding layer is used in the unit, the good shielding property can be achieved, and long-acting antistatic liquid is coated on a first insulating wire core and a second aramid fiber monofilament of the unit, so that the unit has excellent and long-acting antistatic property;
because the electrocardio change intensity of the lower limb is weaker, the requirements on the electrical property, the signal transmission property and the shielding property of a double-shielding signal transmission unit connected with the lower limb are extremely high, silver-plated copper wires are selected to be made into a second conductor in the double-shielding signal transmission unit, the manufacturing cost is high, the conductivity of the unit can be improved, the unit can accurately acquire electrocardiosignals of the lower limb, the signal transmission property is improved, a second insulating layer made of FEP material in the unit has excellent high-low temperature resistance, a lower dielectric coefficient value, low friction coefficient and excellent wear resistance, the conductor consumption can be saved under the same power transmission current, the electrical property of a cable is improved, the transmission loss is reduced, the unit has excellent EMC property by using a double-shielding structure of an aluminum-plastic composite belt and a second winding shielding layer, the weaker electrocardiosignals can be accurately acquired, and long-acting antistatic liquid can be coated on a second insulating wire core and a third cotton rope of the unit to enable the unit to have excellent and long-acting antistatic property;
Because the electrocardio change of the chest and the back is extremely strong, but heart pulsation is required to be monitored directly, extremely high signal transmission performance is required, but the shielding performance requirement is not high, a silver-plated copper wire is selected to be made into a third conductor in a control unit, so that the conductivity of the unit can be improved, the unit can accurately collect electrocardio signals of the chest and the back, and the extremely strong electrocardio change can cover the influence of stray current, a shielding layer is not required to be additionally arranged in the unit, and the antistatic effect of a reticular tearing rope, a second cotton rope and an antistatic filling assembly in a cable can meet the antistatic requirement of the unit, so that the long-acting antistatic liquid is not required to be coated on a third insulating layer of the unit, and the manufacturing cost of the control unit can be reduced;
the antistatic solvent Hecostat 290 and soft water are uniformly mixed according to the volume ratio of 1:50 and then coated on each element, so that the antistatic solvent Hecostat 290 can be permanently attached to the element and cannot lose efficacy due to wiping or environmental change, and the cable can be ensured to keep antistatic property for a long time.
Drawings
Fig. 1 is a schematic structural view of an eighteen-lead electrocardiographic monitoring main cable according to the invention.
Fig. 2 is a schematic diagram of the structure of the single-shielded signal transmission unit in fig. 1.
Fig. 3 is a schematic diagram of a structure of the double-shielded signal transmission unit in fig. 1.
Fig. 4 is a schematic diagram of the structure of the control unit in fig. 1.
Fig. 5 is a general process flow diagram for manufacturing an eighteen-lead electrocardiographic monitoring main cable.
Fig. 6 is a process flow diagram of manufacturing a single shielded signal transmission unit.
Fig. 7 is a process flow diagram of manufacturing a double shielded signal transmission unit.
Fig. 8 is a process flow diagram of manufacturing a control unit.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and the preferred embodiments.
As shown in fig. 1 to 4, the eighteen-lead electrocardiographic monitoring main cable of the present invention includes: the anti-static shielding device comprises a single shielding signal transmission unit 1, a double shielding signal transmission unit 2 and two control units 3, wherein the two control units 3 respectively lean against two sides of the double shielding signal transmission unit 2, the single shielding signal transmission unit 1, the double shielding signal transmission unit 2 and the two control units 3 are twisted into a cable, a reticular tearing rope 4 is respectively filled between the single shielding signal transmission unit 1 and the two control units 3, a second cotton rope 5 is respectively filled between the double shielding signal transmission unit 2 and the two control units 3, long-acting anti-static liquid is coated on the reticular tearing rope 4 and the second cotton rope 5, an anti-static filling assembly 6 is filled among the single shielding signal transmission unit 1, the double shielding signal transmission unit 2, the control units 3 and the reticular tearing rope 4, and the anti-static filling assembly 6 comprises: two first cotton ropes 61 and four first aramid monofilaments 62 are coated on the first cotton ropes 61 and the first aramid monofilaments 62, the four first aramid monofilaments 62 are twisted into a twisted rope in two pairs, the two twisted ropes and the two first cotton ropes 61 are twisted, after the first aramid monofilaments 62 are twisted with the first cotton ropes 61, the tensile strength of the first cotton ropes 61 can be improved, the softness of the first cotton ropes 61 is not affected, the antistatic filling component 6 separates the single shielding signal transmission unit 1 from the double shielding signal transmission unit 2, the signal interference between the single shielding signal transmission unit 1 and the double shielding signal transmission unit 2 can be reduced, the meshed tearing rope 4 is matched with the antistatic filling component 6 to separate the control unit 3 from the single shielding signal transmission unit 1, the signal interference between the single shielding signal transmission unit 1 and the control unit 3 is prevented, the double-shielding signal transmission unit 2 can prevent signal interference with the control unit 3 through two shielding layers of the double-shielding signal transmission unit 2, and the filling net-shaped tearing ropes 4, the antistatic filling components 6 and the second cotton ropes 5 can ensure flexibility and roundness of the cable and can also improve the whole tensile strength of the cable, the single-shielding signal transmission unit 1, the double-shielding signal transmission unit 2 and the two control units 3 which are in a cable form are wrapped with a first PTFE wrapping belt 7 with the thickness of 0.05mm, the first PTFE wrapping belt 7 with the thickness of 0.05mm is not only electrically insulating and protruding, but also has good flexibility, the hardness of the cable is not additionally increased in use, the friction coefficient, the non-sticking surface property and the wide use temperature range are very low, the bending resistance of the cable in the operation process is improved, the sheath 8 made of PUR materials is extruded on the first PTFE belt 7, the PUR has the characteristics of excellent wear resistance, tearing resistance, bending resistance, low-temperature flexibility, excellent oil resistance, solvent resistance, water resistance, weather resistance and the like, ensures that the cable has excellent physical and mechanical properties such as tensile resistance, bending resistance and the like, can protect an internal insulating wire core from mechanical damage and chemical corrosion, ensures that the cable can normally and reliably run in a severe medical environment, can isolate the sheath 8 from each unit by the first PTFE wrapping tape 7, prevents the sheath 8 from adhering to each unit during extrusion, and can not interfere between the sheath 8 and each unit during bending of the cable, thereby ensuring the bending resistance of the cable.
The single shielded signal transmission unit 1 includes: the first conductor 11, the first insulating layer 12, the second PTFE tape 13, the first winding shielding layer 14 and the third PTFE tape 15, the first conductor 11 is formed by concentrically twisting seven tin-plated copper wires with the diameter of 0.127mm, the tin-plated copper wires ensure that the first conductor 11 has excellent corrosion resistance and oxidation resistance when the first conductor 11 has good conductive performance, the first insulating layer 12 made of PE6006 material is extruded on the first conductor 11 to form a first insulating wire core, the PE6006 has good heat resistance and cold resistance, stronger toughness and rigidity and good chemical stability and has excellent insulating dielectric strength, the single shielding signal transmission unit 1 is ensured to have excellent electrical performance and reduce electric energy loss, the signal transmission stability and the signal transmission quality are ensured, the three first insulating wire cores are coated with long-acting antistatic liquid to form a cable, the three first insulated wire cores are filled with three second aramid monofilaments 16, the aramid is a novel high-tech synthetic fiber, the novel high-tech synthetic fiber has excellent performances of ultrahigh strength, high modulus, high temperature resistance, acid resistance, alkali resistance, light weight and the like, the strength of the novel high-tech synthetic fiber is 5 to 6 times of that of a steel wire, the modulus of the novel high-tech synthetic fiber is about 1/5 of that of the steel wire, the novel high-tech synthetic fiber has good insulativity, 2 to 3 times of that of an anti-aging glass fiber, the toughness of the novel high-strength synthetic fiber is 2 times of that of the steel wire, the novel high-tech synthetic fiber is light in weight, the single-shielded signal transmission unit 1 is ensured to have excellent tensile property, the second aramid monofilaments 16 are coated with long-acting antistatic liquid, a layer of second PTFE tape 13 with the thickness of 0.2mm is wrapped on the three first insulated wire cores, a first winding shielding layer 14 is wrapped on the second PTFE tape 13, the novel high-strength synthetic fiber can tighten the three first insulated wire cores of the novel high-strength synthetic fiber, the first winding shielding layer 14 and the first insulating wire core can be separated, the first winding shielding layer 14 is prevented from damaging the first insulating layer 12 on the first insulating wire core when being bent after being in direct contact with the first insulating wire core, a layer of third PTFE wrapping tape 15 with the thickness of 0.1mm is wrapped on the first winding shielding layer 14, the third PTFE wrapping tape 15 is further tightly bound into three first insulating wire cores and the first winding shielding layer 14 of the cable, and the first winding shielding layer 14 is prevented from loosening when the single shielding signal transmission unit 1 is bent, so that the shielding performance of the single shielding signal transmission unit 1 is ensured;
The double shielded signal transmission unit 2 includes: the second conductor 21, the second insulating layer 22, the fourth PTFE tape 23, the aluminum composite tape 24, the second winding shielding layer 25 and the fifth PTFE tape 26 are concentrically twisted, the second conductor 21 is formed by nineteen silver-plated copper wires with the thickness of 0.16mm, the silver-plated copper wires can improve the conductivity, corrosion resistance and oxidation resistance of the second conductor 21, the second insulating layer 22 made of FEP material is extruded on the second conductor 21 to form a second insulating wire core, the FEP has excellent high-low temperature resistance, the lower dielectric coefficient value, the low friction coefficient and the excellent wear resistance, the same transmission current can save the conductor consumption, the electrical performance of the cable is improved, the transmission loss is reduced, the second insulating wire core is coated with a long-acting antistatic liquid, two second insulating wire cores are twisted into a cable, two third cotton ropes 27 are filled with long-acting antistatic liquid, two second insulating wire cores are wrapped with a second layer thickness of 0.1mm, the fourth insulating wire core is provided with a fourth insulating layer of 0.23 mm thickness, the second insulating wire core is provided with a PTFE composite tape 24 which has the high-frequency resistance, the second shielding tape 25 has the high-frequency-interference resistance to the second shielding tape 25, the second shielding tape 25 is provided with the high-frequency-signal transmission shielding tape 2 mm, the high-frequency shielding performance is guaranteed to be connected with the second insulating tape 25, the second shielding tape is provided with the second shielding tape 25, and the high-frequency shielding tape is provided with the high-frequency shielding tape is coated with the second shielding tape 25, the second insulating wire core and the aluminum-plastic composite belt 24 can be prevented from being adhered, but the fourth PTFE wrapping belt 23 is used for adhering the two layers of the fourth PTFE wrapping belt 23 together through friction of self-adhesion characteristics, friction between the second insulating wire core and the aluminum-plastic composite belt 24 can be avoided when bending is carried out, and the second insulating wire core is prevented from being damaged.
The control unit 3 includes: the third conductor 31 and the third insulating layer 32, wherein the third conductor 31 is formed by twisting seven silver-plated copper wires with the diameter of 0.079mm, the silver-plated copper wires can improve the conductivity, corrosion resistance and oxidation resistance of the third conductor 31, the third insulating layer 32 is extruded on the third conductor 31 to form a third insulating wire core, and the seven third insulating wire cores are twisted into a cable in a 1+6 structure.
The single shielding signal transmission unit 1, the double shielding signal transmission unit 2 and the control unit 3 are different in structure, because the positions to be monitored of the single shielding signal transmission unit 1, the double shielding signal transmission unit 2 and the control unit 3 are different, the single shielding signal transmission unit 1 monitors the upper limb, the double shielding signal transmission unit 2 monitors the lower limb, the control unit 3 monitors the chest and back close to the heart, the electrocardio change strength of the upper limb is general, the requirements on the electrical property, the signal transmission property and the shielding property of the single shielding signal transmission unit 1 connected with the upper limb are higher, a tin-plated copper wire is selected to be made into a first conductor 11 in the single shielding signal transmission unit 1, the production cost can be reduced on the premise that the unit can accurately collect electrocardiosignals of the upper limb, the first insulating layer 12 made of PE6006 material can ensure the unit to have excellent electrical property and reduce electric energy loss, the stable signal transmission and the signal transmission quality are ensured, the first winding layer 14 can play a good role in shielding property, and the second monofilament and the second aramid fiber core 16 of the unit can be coated with excellent electrostatic resistance and long-lasting electrostatic resistance;
The electrical performance, signal transmission performance and shielding performance of the double-shielding signal transmission unit 2 connected with the lower limb are required to be extremely high, silver-plated copper wires are selected to be used for manufacturing the second conductor 21 in the double-shielding signal transmission unit 2, although the manufacturing cost is high, the conductivity of the unit can be improved, so that the unit can accurately collect electrocardiosignals of the lower limb, the signal transmission performance is improved, the second insulating layer 22 made of FEP material in the unit has excellent high and low temperature resistance, the dielectric coefficient is lower, the friction coefficient is low, the wear resistance is excellent, the conductor consumption can be saved under the same power transmission current, the electrical performance of a cable is improved, the transmission loss is reduced, the double-shielding structure of the aluminum-plastic composite belt 24 and the second winding shielding layer 25 in the unit can enable the unit to have excellent EMC performance, the weaker electrocardiosignals can be accurately collected, and the second insulating wire core and the third cotton rope 27 of the unit can be coated with long-acting anti-static electricity performance;
the electrocardio change of chest back is extremely strong, but need directly monitor heart beat, so need extremely high signal transmission performance, but to shielding nature requirement not high, select silver-plated copper wire to make third conductor 31 in control unit 3, can improve the electric conductivity of this unit, make this unit can accurately gather the electrocardio signal of chest back, and extremely strong electrocardio change can cover the influence of stray current, so need not set up the shielding layer in this unit additionally, and the antistatic effect that netted tearing rope 4 in the cable, second cotton rope 5 and antistatic filling assembly 6 played can satisfy the antistatic requirement of this unit, so need not to coat long-term antistatic liquid on the third insulating layer 32 of this unit, just so can reduce the manufacturing cost of control unit 3.
When using eighteen-lead electrocardiograph to monitor, leads are needed to be conducted on the lower limb, the upper limb, the front chest and the back chest of a patient, the potential changes reflected by the two lower limbs are different, the potential changes are weaker when the two lower limbs are far away from the heart, the potential changes are weakest, the two lower limbs are required to be monitored by using the two second insulating wire cores in the double-shielding signal transmission unit 2 with best shielding effect and conductivity and low transmission loss, the distance between the two upper limbs and the heart is smaller than the distance between the lower limbs and the heart, the potential changes are generally smaller, the two upper limbs are required to be monitored by using the two first insulating wire cores in the single-shielding signal transmission unit 1 with better shielding effect and conductivity, meanwhile, the third first insulating wire core in the single-shielding signal transmission unit 1 is required to be connected with the ground wire, the front chest and the back chest are nearest to the heart, the potential changes are extremely strong, but the two lower limbs are required to be monitored by directly beating the heart, the sensing sensitivity and the sensitivity are required to be very high, and the conductivity is required to be controlled by using the three insulating wire cores in the single-shielding signal transmission unit 1. In the monitoring process, the first insulating layer 12, the second insulating layer 22, the second aramid fiber monofilament 16 and the third cotton rope 27 in the single shielding signal transmission unit 1 and the double shielding signal transmission unit 2 are coated with long-acting antistatic liquid, so that the single shielding signal transmission unit 1 and the double shielding signal transmission unit 2 have excellent antistatic performance, the influence of stray current on the transmission quality of signals is avoided, and the antistatic performance of the whole cable can be improved by matching with the reticular tearing rope 4 coated with the long-acting antistatic liquid, the second cotton rope 5 and the antistatic filling component 6, the antistatic effect of the single shielding signal transmission unit 1 and the double shielding signal transmission unit 2 is further improved, and the current intensity received by the control unit 3 is relatively high because the chest and back part monitored by the control unit 3 is close to the heart, the signal transmission quality in the control unit 3 is not influenced by the stray current, and the antistatic effect of the reticular tearing rope 4, the second cotton rope 5 and the antistatic filling component 6 can meet the antistatic requirement of the control unit 3, so that the long-acting antistatic effect of the third insulating layer 32 on the control unit 3 is not needed.
As shown in fig. 5 to 8, the manufacturing method of the eighteen-lead electrocardiograph monitoring main cable comprises the following steps:
s1, manufacturing a single-shielding signal transmission unit 1, firstly, concentrically twisting seven tin-plated copper wires with the diameter of 0.127mm to form a first conductor 11, extruding a first insulating layer 12 on the first conductor 11 to ensure that the concentricity of the first insulating layer 12 is less than or equal to 1.1%, respectively passing a first insulating wire core and a second aramid fiber monofilament 16 through long-acting antistatic solutions with the diameters of 120+/-2 ℃, drying and cooling the first insulating wire core and the second aramid fiber monofilament 16 coated with the long-acting antistatic solutions, twisting the three first insulating wire cores into a cable, filling the three second aramid fiber monofilaments 16, wrapping a second PTFE tape 13 on the three first insulating wire cores of the cable, wrapping a first winding shielding layer 14 on the second PTFE tape 13, wherein the first winding shielding layer 14 is formed by winding six silver-plated copper wires with the diameter of 0.079mm, the first winding shielding layer 14 is formed by winding the silver-plated copper wires with the diameters of 100%, and the phenomenon that stacking wires or gaps are too large does not occur after the winding, meanwhile, the three first shielding layer 14 has excellent corrosion resistance, low-loss resistance, and high-temperature resistance, and high-resistance, and the like, and the single-shielding signal transmission unit has excellent high-temperature resistance, and the first shielding performance, and the first shielding unit has high-temperature resistance, and can be finally wrapped on a first shielding unit, and 15;
Because the single shielding signal transmission unit 1 is connected with the upper limb body lead, and the potential change of the upper limb is common, the single shielding signal transmission unit 1 needs to have good electrical transmission performance, and the electrical transmission performance is represented by a capacitance value, so in the step, when the first insulating layer 12 needs to be extruded, the water capacitance value of the first insulating layer 12 is controlled to be 138+/-5 pF/m, so that the single shielding signal transmission unit 1 after cabling has good electrical transmission performance, and the potential change of the upper limb can be accurately detected;
s2, manufacturing a double-shielding signal transmission unit 2, firstly, concentrically twisting nineteen silver-plated copper wires with the diameter of 0.16mm into a second conductor 21, extruding a second insulating layer 22 on the second conductor 21 to ensure that the concentricity of the second insulating layer 22 is less than or equal to 1.1%, respectively enabling a second insulating wire core and a third cotton rope 27 to pass through long-acting antistatic solution with the temperature of 120+/-2 ℃, drying and cooling the first insulating wire core and the third cotton rope 27 coated with the long-acting antistatic solution, twisting the two second insulating wire cores into a cable, filling the two third cotton ropes 27, wrapping two layers of fourth PTFE (polytetrafluoroethylene) 23 on the two third insulating wire cores, wrapping an aluminum-plastic composite belt 24 on the outer side of the fourth PTFE (polytetrafluoroethylene) wrapping belt 23, wrapping a second winding shielding layer 25 on the aluminum-plastic composite belt 24, and finally wrapping the second shielding layer 25 with the covering rate of 100% by eight silver-plated copper wires with the diameter of 0.079 mm;
Because the double-shielded signal transmission unit 2 is connected with the lower limb and the potential change of the lower limb is weak, the double-shielded signal transmission unit 2 is required to have excellent electrical transmission performance, so in the step, when the second insulating layer 22 is required to be extruded, the water capacitance value of the second insulating layer 22 is controlled to be 211+/-5 pF/m, so that the double-shielded signal transmission unit 2 after being cabled is ensured to have excellent electrical transmission performance, and the potential change of the lower limb can be accurately detected;
s3, manufacturing a control unit 3, firstly twisting seven silver-plated copper wires with the diameter of 0.079mm into a third conductor 31, extruding a third insulating layer 32 on the third conductor 31 to ensure that the concentricity of the third insulating layer 32 is less than or equal to 1.1%, and finally twisting seven third insulating wire cores into a cable in a 1+6 type structure, wherein the control unit 3 is connected with the chest and back near the heart, and the potential change of the chest and back is stronger, so that the capacitance value of the control unit 3 does not need to be considered;
s4, respectively penetrating the netlike tearing ropes 4 and the third aramid filaments 5 through long-acting antistatic solutions at 120+/-2 ℃, and respectively drying and cooling the netlike tearing ropes 4 and the third aramid filaments 5 coated with the long-acting antistatic solutions;
S5, manufacturing an antistatic filling assembly: respectively passing the first aramid filaments and the first cotton ropes through long-acting antistatic solutions at 120+/-2 ℃, respectively drying and cooling the first aramid filaments and the first cotton ropes coated with the long-acting antistatic solutions, twisting the first cotton ropes in pairs to form twisted ropes, passing the twisted ropes through the long-acting antistatic solutions at 120+/-2 ℃, drying and cooling, twisting the two first cotton ropes and the two groups of twisted ropes to form antistatic filling components, and finally passing the antistatic filling components through the long-acting antistatic solutions at 120+/-2 ℃, and drying and cooling;
s6, 100% untwisting stress-free twisting is carried out on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units by taking the antistatic filler as a center to form a cable, one net-shaped tearing rope is respectively filled between the single shielding signal transmission unit and the two control units during twisting, and a third aramid monofilament coated with a long-acting antistatic solution is filled between the double shielding signal transmission unit and the two control units;
and S7, wrapping a first PTFE wrapping tape on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units which are formed into a cable, and extruding a sheath on the first PTFE wrapping tape.
In this embodiment, the concentricity is calculated as follows:the concentricity of the insulating layer is controlled to ensure the electrical performance and the mechanical performance of the cable, when the insulating layer is not concentric, different thicknesses can appear on the insulating layer, if the ratio of the maximum thickness to the minimum thickness of the insulating layer is too large, the electric field distribution of the cable can be uneven, the electrical performance of the cable is affected, and if the minimum thickness of the insulating layer is too thin, the interference received by adjacent lines can be increased, the near-end crosstalk can be increased, and the electrical performance of the cable is affected. Therefore, it is necessary to control concentricity of the first, second and third insulating layers 12, 22 and 32 to be 1.1% or less, so that the single-shielded signal transmission unit 1, the double-shielded signal transmission unit 2 and the control unit 3 are provided with a relatively high degree of concentricityExcellent electrical and mechanical properties.
In this embodiment, although the water capacitance values required for the first insulating layer 12 and the second insulating layer 22 are different, the method of controlling the water capacitance values of the first insulating layer 12 and the second insulating layer 22 is the same, and the first insulating layer 12 is described as an example: according to the formulaIt is understood that the water content of the first insulating layer 12 is equal to the outer diameter (D) of the first conductor 11, the outer diameter (D) of the first insulating layer 12, and the equivalent relative permittivity (ε) of the first insulating layer 12 1 ) In the related manner, since the first insulating layer 12 is made of the PE6006 material, the dielectric constant of the PE6006 is a constant value, and the first conductor 11 is formed by concentrically twisting seven tin-plated copper wires with the diameter of phi 0.127mm, the formula is calculated by the twisting outer diameter of the conductor: as d= (1+2n) ×d '(n is the number of layers of the conductor from inside to outside), since the outer diameter (D) of the first conductor 11 is a constant value calculated from the wire diameter (D') and the number of layers (n) of the tinned copper wire, it is known that, in summary, the change in the water capacitance value of the first insulating layer 12 is related to the change in the outer diameter (D) of the first insulating layer 12; the specific control method is as follows: when the capacitance tester detects that the water capacitance value of the extruded first insulating layer 12 is unqualified, the capacitance tester can change the outer diameter (D) of the first insulating layer 12 by adjusting the preheating temperature, the extrusion temperature, the position of the cooling water tank and the cooling water temperature or can change the outer diameter (D) of the first insulating layer 12 more accurately by adjusting the screw speed of the extruder host and the rotating speed of the traction wheel within the allowable range of the insulation outer diameter tolerance of the first insulating layer 12, so that the water capacitance value of the first insulating layer 12 meets the requirement.
In this embodiment, the long-acting antistatic liquid is uniformly mixed by the antistatic solvent Hecostat290 and the soft water according to the volume ratio of 1:50, in the mixing process, 1 part by volume of the antistatic solvent Hecostat290 is firstly added into a container, 50 parts by volume of the soft water is then poured into the container to be mixed with the antistatic solvent Hecostat290, then the container is heated and stirred while heating, when the temperature of the long-acting antistatic liquid formed by mixing the antistatic solvent Hecostat290 and the soft water reaches 120+/-2 ℃, the long-acting antistatic liquid is kept warm, so that the long-acting antistatic liquid formed by mixing the antistatic solvent and the soft water can exist on each element for a long time, and can not be invalid due to wiping or environmental change, so that the cable can keep the antistatic property for a long time, and the single shielding signal transmission unit 1 and the double shielding signal transmission unit 2 have excellent antistatic property, and the transmission quality of the signal can be prevented from being influenced by stray current.
In this embodiment, the method of coating the first insulating wire core, the second insulating wire core, each aramid monofilament, the netlike tearing rope and each cotton rope with the long-acting antistatic liquid is the same, and the first insulating wire core is taken as an example for explanation: the long-acting antistatic liquid in the container is passed through by the first insulating wire core at the speed of 10m/min, the speed can ensure that the first insulating wire core is fully contacted with the long-acting antistatic liquid, then the long-acting antistatic liquid vertically upwards enters into the drying channel for drying, the redundant long-acting antistatic liquid attached to the first insulating wire core falls back into the container along the first insulating wire core under the action of gravity, the drying efficiency can be improved, the waste of the redundant long-acting antistatic liquid can be avoided, and the long-acting antistatic liquid enters into the cooling channel for air cooling after the drying is finished.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (9)
1. Eighteen-lead electrocardiograph monitoring main cable is characterized in that: comprising the following steps: the single shielding signal transmission unit, the double shielding signal transmission unit, and two control units, two control units support respectively and lean on the both sides of double shielding signal transmission unit, single shielding signal transmission unit, double shielding signal transmission unit and two control units hank become the cable, all fill between single shielding signal transmission unit and two control units and tear the rope with the net, fill respectively between double shielding signal transmission unit and two control units and have a second cotton rope, all coat long-term antistatic liquid on netted tearing rope and second cotton rope, it has antistatic filling assembly to fill between single shielding signal transmission unit, double shielding signal transmission unit, control unit and netted tearing rope, antistatic filling assembly includes: the two first cotton ropes and four first aramid monofilaments are twisted into a twisted rope in a two-to-two mode, the two twisted ropes are twisted with the two first cotton ropes, long-acting antistatic liquid is coated on the first cotton ropes and the first aramid monofilaments, a first PTFE wrapping belt is wrapped on a single shielding signal transmission unit, a double shielding signal transmission unit and two control units of the cable, and a sheath is extruded on the first PTFE wrapping belt;
The single shielding signal transmission unit includes: the cable comprises a first conductor, a first insulating layer, a second PTFE tape, a first winding shielding layer and a third PTFE tape, wherein the first conductor is formed by twisting a plurality of tinned copper wires, the first conductor is extruded with the first insulating layer to form a first insulating wire core, the first insulating wire core is coated with long-acting antistatic liquid, the three first insulating wire cores are twisted into a cable, three second aramid filaments are filled among the three first insulating wire cores which are formed into a cable, the second aramid filaments are coated with long-acting antistatic liquid, the three first insulating wire cores which are formed into a cable are wound with one layer of second PTFE tape, the second PTFE tape is wound with the first winding shielding layer, and the first winding shielding layer is wound with one layer of third PTFE tape;
the double-shielded signal transmission unit includes: the second conductor is formed by twisting a plurality of silver-plated copper wires, the second conductor is extruded with a second insulating layer to form a second insulating wire core, the second insulating wire core is coated with long-acting antistatic liquid, two second insulating wire cores are twisted into a cable, two third cotton ropes are filled between the two second insulating wire cores of the cable, the third cotton ropes are coated with long-acting antistatic liquid, the two second insulating wire cores of the cable are wound with two layers of fourth PTFE tape, the fourth PTFE tape positioned on the outer side is wound with an aluminum-plastic composite tape, the second winding shielding layer is wound on the aluminum-plastic composite tape, the second winding shielding layer is connected with the aluminum surface of the aluminum-plastic composite tape in a conducting manner, and the fifth PTFE tape is wound on the second winding shielding layer;
The control unit includes: the cable comprises a third conductor and a third insulating layer, wherein the third conductor is formed by twisting a plurality of silver-plated copper wires, the third insulating layer is extruded on the third conductor to form a third insulating wire core, and seven third insulating wire cores are twisted into a cable in a 1+6 structure.
2. The eighteen-lead electrocardiographic monitoring main cable of claim 1, wherein: the first conductor is formed by concentrically twisting seven tinned copper wires with phi of 0.127mm, the first insulating layer is made of PE6006 material, the thickness of the second PTFE tape is 0.2mm, and the thickness of the third PTFE tape is 0.1mm.
3. The eighteen-lead electrocardiographic monitoring main cable of claim 1, wherein: the second conductor is formed by concentrically twisting nineteen silver-plated copper wires with phi of 0.16mm, the second insulating layer is made of FEP material, the thickness of the fourth PTFE tape is 0.1mm, and the thickness of the fifth PTFE tape is 0.05mm.
4. The eighteen-lead electrocardiographic monitoring main cable of claim 1, wherein: the third conductor is formed by twisting seven silver-plated copper wires with the thickness of 0.079 mm.
5. The eighteen-lead electrocardiographic monitoring main cable of claim 1, wherein: the thickness of the first PTFE tape is 0.05mm, and the sheath is made of PUR material.
6. The method of manufacturing an eighteen-lead electrocardiographic monitoring main cable according to any one of claims 1-5, comprising the steps of:
s1, manufacturing a single shielding signal transmission unit, wherein when a first insulating layer is extruded, the water capacitance value of the first insulating layer is controlled to be 138+/-5 pF/m, the concentricity of the first insulating layer is ensured to be less than or equal to 1.1%, before the first insulating wire core is twisted, the first insulating wire core and the second aramid fiber monofilament are required to pass through a long-acting antistatic solution at 120+/-2 ℃ respectively, and then the first insulating wire core and the second aramid fiber monofilament coated with the long-acting antistatic solution are dried and cooled;
s2, manufacturing a double-shielding signal transmission unit, wherein when a second insulating layer is extruded, the water electrolysis value of the second insulating layer is controlled to be 211+/-5 pF/m, the concentricity of the second insulating layer is ensured to be less than or equal to 1.1%, before the second insulating wire core is twisted, the second insulating wire core and a third cotton rope respectively pass through a long-acting antistatic solution at 120+/-2 ℃, and then the second insulating wire core and the third cotton rope coated with the long-acting antistatic solution are dried and cooled;
s3, manufacturing a control unit, wherein when the third insulating layer is extruded, the concentricity of the third insulating layer is required to be less than or equal to 1.1%, and seven third insulating wire cores are twisted into a cable in a 1+6 structure;
S4, respectively passing the netlike tearing ropes and the third aramid filaments through long-acting antistatic solutions at 120+/-2 ℃, and respectively drying and cooling the netlike tearing ropes and the third aramid filaments coated with the long-acting antistatic solutions;
s5, manufacturing an antistatic filling assembly: respectively passing the first aramid filaments and the first cotton ropes through long-acting antistatic solutions at 120+/-2 ℃, respectively drying and cooling the first aramid filaments and the first cotton ropes coated with the long-acting antistatic solutions, twisting the first cotton ropes in pairs to form twisted ropes, passing the twisted ropes through the long-acting antistatic solutions at 120+/-2 ℃, drying and cooling, twisting the two first cotton ropes and the two groups of twisted ropes to form antistatic filling components, and finally passing the antistatic filling components through the long-acting antistatic solutions at 120+/-2 ℃, and drying and cooling;
s6, carrying out 100% untwisting stress-free twisting on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units by taking the antistatic filler as a center to form a cable, respectively filling a netlike tearing rope coated with a long-acting antistatic solution between the single shielding signal transmission unit and the two control units during twisting, and respectively filling a third aramid monofilament coated with the long-acting antistatic solution between the double shielding signal transmission unit and the two control units;
And S7, wrapping a first PTFE wrapping tape on the single shielding signal transmission unit, the double shielding signal transmission unit and the two control units which are formed into a cable, and extruding a sheath on the first PTFE wrapping tape.
7. The method of manufacturing an eighteen-lead electrocardiographic monitoring main cable according to claim 6, wherein: in controlling the water capacitance value in S1 and S2, this is achieved by controlling the outer diameter of the first insulating layer or the second insulating layer.
8. The method of manufacturing an eighteen-lead electrocardiographic monitoring main cable according to claim 6, wherein: the long-acting antistatic liquid is uniformly mixed with soft water by an antistatic solvent Hecostat 290 according to the volume ratio of 1:50.
9. The method of manufacturing an eighteen-lead electrocardiographic monitoring main cable according to claim 6, wherein: the first insulating wire core, the second insulating wire core, each aramid fiber monofilament, each cotton rope and the netlike tearing rope pass through the long-acting antistatic liquid at the speed of 10m/min, and then enter a drying channel and a cooling channel in sequence for drying and cooling.
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| CN202310942627.8A CN116705389B (en) | 2023-07-31 | 2023-07-31 | Eighteen-lead electrocardiograph monitoring main cable and manufacturing method thereof |
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| CN202310942627.8A CN116705389B (en) | 2023-07-31 | 2023-07-31 | Eighteen-lead electrocardiograph monitoring main cable and manufacturing method thereof |
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| CN212541956U (en) * | 2020-07-15 | 2021-02-12 | 深圳市金瑞龙特种线材有限公司 | Medical multifunctional combined wire |
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