CN113327724B - Filling process and processing system for security and protection cable waterproof glue and security and protection cable waterproof structure - Google Patents
Filling process and processing system for security and protection cable waterproof glue and security and protection cable waterproof structure Download PDFInfo
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- CN113327724B CN113327724B CN202110580864.5A CN202110580864A CN113327724B CN 113327724 B CN113327724 B CN 113327724B CN 202110580864 A CN202110580864 A CN 202110580864A CN 113327724 B CN113327724 B CN 113327724B
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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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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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
- H01B13/32—Filling or coating with impervious material
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
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- 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 application relates to the field of security cables, and particularly discloses a filling process and a processing system for security cable waterproof glue and a security cable waterproof structure. The filling process of the security cable waterproof adhesive sequentially comprises the following steps according to the treatment process: mixing polyolefin and a diluent, uniformly stirring, adding a high-temperature antioxidant, stirring until the high-temperature antioxidant is dissolved, adding a coagulant, and stirring until the coagulant is dissolved to obtain the security cable waterproof adhesive; and heating the security cable waterproof glue, and putting the metal conductor into the security cable waterproof glue for infiltration after the security cable waterproof glue is completely melted. The security and protection cable processing system comprises an infiltration device, the infiltration device comprises an infiltration groove used for containing security and protection cable waterproof glue, and a heating assembly used for heating the security and protection cable waterproof glue and a tensioning assembly used for tensioning a metal conductor are arranged in the infiltration groove. The application provides a packing technology of security protection cable waterproof glue has the gas tightness that improves the security protection cable, makes the inside advantage of security protection cable of difficult infiltration of steam.
Description
Technical Field
The application relates to the field of security cables, in particular to a filling process and a processing system for security cable waterproof glue and a waterproof structure of a security cable.
Background
The security protection cable is a weak current cable used for transmitting video signals, control signals and other data information in security protection engineering projects. The security cable is generally formed by coating a metal conductor such as tinned copper with a plastic insulating material and glue to isolate the metal conductor from the external environment so as to prevent the metal conductor from being damaged and affecting the normal operation of the security cable.
The gas tightness is one of the important performances that the security cable should possess, if the gas tightness of security cable is not good, when external environment changes, for example temperature change, air flow etc. make easily to produce the atmospheric pressure difference between security cable plastic insulation layer inside and outside, lead to moisture and oxygen from security cable exterior space to the internal clearance undirectional diffusion. Especially when the air is moist and abundant in water vapor, such as in the rainy season in the south, a large amount of water vapor in the air permeates into the metal conductor inside the security cable, so that the signal attenuation is greatly increased, the stability and reliability of digital information transmission are seriously affected, and the oxidation of the metal conductor is accelerated in a high-humidity aerobic environment, so that the digital information transmission is further affected, and a vicious circle is formed.
Most security cables in the market at present adopt a manual end-sealing glue dispensing process, and glue is dispensed at the end parts of the security cables. However, the security protection cable that obtains through the mode of artifical terminal capping point glue all has certain clearance between the metallic conductor, between metallic conductor and the plastic insulation material to and between metallic conductor and other cable components, and fluid such as steam can flow in the clearance after permeating security protection cable is inside, therefore security protection cable has the not good enough defect of gas tightness.
Therefore, a new security cable processing technology is urgently needed in the industry to make up for the defects.
Disclosure of Invention
In order to improve the gas tightness of security protection cable, make inside steam is difficult to the infiltration security protection cable, this application provides a waterproof packing technology, system of processing and the waterproof construction of security protection cable of gluing of security protection cable.
In a first aspect, the application provides a filling process for a security cable waterproof adhesive, which adopts the following technical scheme: the filling process of the security cable waterproof adhesive sequentially comprises the following steps according to the treatment process:
s1: mixing polyolefin and a diluent, uniformly stirring, adding a high-temperature antioxidant, stirring until the high-temperature antioxidant is dissolved, adding a coagulant, and stirring until the coagulant is dissolved to obtain the security cable waterproof adhesive;
s2: and heating the security cable waterproof glue, and putting the metal conductor into the security cable waterproof glue for infiltration after the security cable waterproof glue is completely melted.
By adopting the technical scheme, the security cable waterproof glue prepared from the polyolefin, the diluent, the coagulant and the high-temperature antioxidant has an extremely low viscosity index, and the security cable waterproof glue is endowed with a unique viscosity-temperature characteristic, so that the mobility of the security cable waterproof glue can be increased along with the rise of the temperature, and the security cable waterproof glue is endowed with good metal wettability. On this basis, when processing the security protection cable, earlier with the waterproof glue of security protection cable heat up to the melting, then put into metallic conductor, the waterproof glue of security protection cable can be abundant moisten metallic conductor surface, and cladding metallic conductor, fill between the metallic conductor, between metallic conductor and the plastics insulating material, and in the clearance between metallic conductor and other cable components, get rid of the interior air in the clearance, and plug up the clearance, thereby help preventing that the security protection cable from being permeated or migrating by steam in the application in later stage, oxygen, inside the erosion that causes of security protection cable is perhaps transferred to water or other fluids, the effect that has the gas tightness that improves the security protection cable.
Preferably, in the S2, the temperature of the security cable waterproof glue is raised to be more than 150 ℃.
By adopting the technical scheme, when the temperature is lower than 90 ℃, the security cable waterproof glue is white homogeneous gel-like semisolid. When the temperature is about 90 ℃, the viscosity of the security cable waterproof glue is reduced, the fluidity is improved, and the security cable waterproof glue begins to soften into a semi-fluid state. When the temperature is about 130 ℃, the viscosity of the security cable waterproof glue is continuously reduced and slowly changed into colorless transparent liquid from a semi-fluid state. When the temperature reaches 150 ℃, the security cable waterproof glue is completely melted into colorless and transparent liquid with excellent fluidity, so that the metal conductor is easy to wet, and the twisted metal conductor is more convenient to infiltrate and fill.
Preferably, in S2, the waterproof glue for the security and protection cable is heated to 160-180 ℃.
By adopting the technical scheme, when the temperature is 160-180 ℃, the viscosity of the security cable waterproof glue is moderate and stable, and the infiltration effect of the security cable waterproof glue on the metal conductor is better.
Meet some too big equipment of heating power, when heating temperature directly sets up to more than 160 ℃, the waterproof glue of security protection cable is easy because local overheat, and local heating temperature is greater than 160 ℃ far away and the waterproof glue of semi-solid state thermal conductivity relatively poor characteristic, the phenomenon of smoking appears, to this, can adopt the mode of segmentation heating to heat the waterproof glue of security protection cable, for example first step temperature sets for 100 ℃, after the waterproof glue of security protection cable is most to become the semifluid from the semi-solid, set for 135 ℃, after the waterproof glue of security protection cable is most to become the fluid, set for 160 ℃. The mode of sectional heating makes the waterproof inside heat that glues of security protection cable can in time transmit, and the waterproof inside and outside heat of gluing of security protection cable is more even, balanced, has alleviated the waterproof local overheated phenomenon of gluing of security protection cable, more helps solving the thermal decomposition and the problem of smoking.
Preferably, S1 comprises the following steps in sequence according to the treatment process:
s11: mixing 45-70 parts by weight of polyolefin and 20-44 parts by weight of diluent, and stirring at 100-120 ℃ and 50-200rpm for 10-30min to ensure that the polyolefin and the diluent are uniform;
s12: adding 0.5-1.5 weight parts of high temperature antioxidant, stirring at 130-160 deg.C and 200-500rpm for 20-30min to dissolve the high temperature antioxidant;
s13: adding 9-14 parts by weight of coagulant, stirring at 130-180 ℃ and 300-800rpm for 3-5h to dissolve the coagulant, and obtaining the security cable waterproof adhesive.
Through adopting above-mentioned technical scheme, the preparation process of security protection cable waterproof glue only needs to mix, stir the raw materials according to the order, easy operation, convenience, swift, no special condition requirement also need not a large amount of manpower and materials participation, is favorable to the large-scale volume production and the application of security protection cable waterproof glue.
In a second aspect, the application provides a security cable processing system, which adopts the following technical scheme:
the utility model provides a be applied to among the above-mentioned technical scheme security protection cable processing system of waterproof gluey filling process of security protection cable, includes the infiltration device, the infiltration device is including being used for holding the waterproof gluey infiltration groove of security protection cable, be equipped with the tensioning subassembly that is used for tensioning metallic conductor and be used for heating the waterproof gluey heating element of security protection cable in the infiltration groove.
Through adopting above-mentioned technical scheme, through setting up infiltration groove, heating element and tensioning assembly, hold security protection cable waterproof glue in infiltration inslot to pass through tensioning assembly with metal conductor and fix infiltration inslot back, when the heating element heating, security protection cable waterproof glue is heated the melting back, and the waterproof glue of complete melting will carry out abundant infiltration to the cable core through capillary action, thereby makes in the cable core by the copper line transposition and the inside hole and the surface recess that form are filled by waterproof glue completely.
Preferably, the tensioning assembly comprises two fixing pieces arranged in the infiltration tank, the lower ends of the fixing pieces extend into the infiltration tank and are provided with a plurality of fixing guide wheels, and the metal conductors are sequentially wound on the fixing guide wheels of the two fixing pieces in a staggered manner.
Through adopting above-mentioned technical scheme, through all setting up a plurality of fixed guide pulleys on two mountings, make the winding that metal conductor can constantly make a round trip on two mountings, increased the length of metal conductor winding on the mounting, increased the stroke of metal conductor in the infiltration groove promptly to increased the infiltration time of metal conductor in the infiltration groove under the condition of not prolonging infiltration groove length, makeed the infiltration of metal conductor more abundant, high-efficient.
Preferably, the metal conductor is wound on the fixed guide wheel from top to bottom.
By adopting the technical scheme, the larger the infiltration depth is, the larger the infiltration pressure is, and the better the infiltration effect on the metal conductor with more strands is. Through from last down around locating fixed guide pulley with metal conductor, be favorable to promoting inside security protection cable waterproof glue gets into the metal conductor of transposition along with the increase of degree of depth, from the surface more evenly fill between the metal conductor, reach better infiltration effect. The security cable processing system has a good infiltration filling effect on metal conductors with the number of strands up to 65.
Preferably, the heating assembly comprises a bottom heating plate and a side heating plate, the bottom heating plate is arranged on the bottom surface of the infiltration tank, and the side heating plate is arranged on the side surface of the infiltration tank.
Through adopting above-mentioned technical scheme, all set up the hot plate through bottom surface and the side at infiltration groove, can heat the waterproof glue of security protection cable of infiltration groove bottom surface and side simultaneously to it is more even to make the waterproof glue heating of security protection cable, has not only promoted metallic conductor's infiltration effect, still helps avoiding leading to the phenomenon that thermal decomposition appears the smoking because of the waterproof local overheat of gluing of security protection cable.
Preferably, the security and protection cable processing system further comprises a preheating device, and the metal conductor is preheated by the preheating device and then infiltrated by the infiltration device.
By adopting the technical scheme, the metal conductor is preheated and then infiltrated, so that the temperature of the metal conductor is closer to the temperature of the waterproof glue of the security cable when the metal conductor is infiltrated, and the infiltration effect of the metal conductor is further improved.
Preferably, the security and protection cable processing system further comprises an unwinding device, an extrusion device, a cooling device, a traction device and a winding device, wherein the unwinding device, the preheating device, the soaking device, the extrusion device, the cooling device, the traction device and the winding device are sequentially arranged along the conveying direction of the metal conductor.
Through adopting above-mentioned technical scheme, metallic conductor preheats through preheating device after unreeling from unwinding device, then soaks, fills the waterproof glue of security protection cable through infiltration device, eschs line, cladding plastics insulating material through escorting the device again, forms the security protection cable, and the security protection cable cools off through cooling device, draws through draw gear again, and the rolling is got up the security protection cable through the coiling mechanism at last, accomplishes metallic conductor's whole course of working.
The third aspect, this application provides a waterproof construction of security protection cable, adopts following technical scheme:
the waterproof structure of the security and protection cable manufactured by the filling process of the security and protection cable waterproof glue comprises a metal conductor, wherein a waterproof glue layer is arranged on the surface of the metal conductor, and a plastic insulating layer is arranged outside the waterproof glue layer.
Through adopting above-mentioned technical scheme, waterproof glue film is soaked the waterproof glue of security protection cable by metal conductor and is formed, and waterproof glue film is filled in metal conductor because of the inside hole and the surperficial recess that the transposition formed, air between the metal conductor that can effectual discharge to plug up the clearance, prevent the air admission between the metal conductor, thereby realize the improvement of security protection cable gas tightness, reach waterproof effect. The waterproof structure of the security cable is beneficial to preventing the metal conductor oxidation, signal attenuation and digital information transmission instability caused by the fact that the security cable is permeated or migrated into the security cable by water vapor, oxygen, water or other fluids in later-stage application.
In summary, the present application has the following beneficial effects:
1. the security and protection cable waterproof glue prepared from the polyolefin, the diluent, the coagulant and the high-temperature antioxidant has an extremely low viscosity index, and the security and protection cable waterproof glue is endowed with a unique viscosity-temperature characteristic, so that the mobility of the security and protection cable waterproof glue can be increased along with the rise of the temperature, and the security and protection cable waterproof glue is endowed with good metal wettability. On this basis, when processing the security protection cable, earlier with the waterproof glue of security protection cable heat up to the melting, then put into metallic conductor, the waterproof glue of security protection cable can be abundant moisten metallic conductor surface, and cladding metallic conductor, fill between the metallic conductor, between metallic conductor and the plastics insulating material, and in the clearance between metallic conductor and other cable components, get rid of the interior air in the clearance, and plug up the clearance, thereby help preventing that the security protection cable from being permeated or migrating by steam in the application in later stage, oxygen, inside the erosion that causes of security protection cable is perhaps transferred to water or other fluids, the effect that has the gas tightness that improves the security protection cable. The security cable manufactured by the filling process of the security cable waterproof adhesive has an all-dimensional waterproof function, and meets the requirement of three-level waterproof grade.
2. The preparation process of the security cable waterproof adhesive only needs to mix and stir the raw materials in sequence, is simple, convenient and quick to operate, does not have special condition requirements, does not need participation of a large amount of manpower and material resources, and is favorable for large-scale mass production and application of the security cable waterproof adhesive.
3. The security and protection cable waterproof glue's that this application was made viscosity-temperature characteristic still makes security and protection cable waterproof glue have more excellent cohesiveness and compliance, makes the security and protection cable in the face of buckle for a long time, when the environment of curling, the phenomenon that the security and protection cable waterproof glue also is difficult for appearing splitting, for laying effects such as cable provides good insulation, buffering, waterproof, dampproofing, fully ensured security and protection cable digital information transmission's stability, reliability and safety in utilization.
4. The security cable waterproof glue prepared by the method is excellent in compatibility with plastic insulating materials such as silicon rubber, ethylene propylene diene monomer, PE, crosslinked PE and PVC, does not swell or slightly swells after being contacted for a long time, and can ensure long-term stable use of security cables. In addition, the security cable waterproof glue has the advantages of no oil separation, small acid value, strong corrosion resistance, no emulsification, excellent dielectric property and electrical property, and is more excellent and prominent than most security cable waterproof glue in the market. The security cable waterproof adhesive can only slightly yellow after being placed at 180 ℃ for 7 days, does not affect performance, and can keep soft at-40 ℃.
5. Through setting up infiltration groove, heating element and tensioning assembly, hold security protection cable waterproof glue in the infiltration groove to pass through tensioning assembly with metallic conductor and fix the back in the infiltration groove, when the heating element heating, security protection cable waterproof glue is heated the melting back, can fully soak metallic conductor through the capillary action, thereby permeate into metallic conductor because of in the inside hole and the surperficial recess that the transposition formed, realize the packing to metallic conductor.
6. Through all setting up a plurality of fixed guide pulleys on two mountings, make the winding that metal conductor can constantly make a round trip on two mountings, increased the length of metal conductor winding on the mounting, increased the stroke of metal conductor in the infiltration groove promptly to increased the infiltration time of metal conductor in the infiltration groove under the condition of not prolonging infiltration groove length, makeed the infiltration of metal conductor more abundant, high-efficient.
7. The metal conductor is preheated and then infiltrated, so that the temperature of the metal conductor is closer to the temperature of the security cable waterproof glue when the metal conductor is infiltrated, and the infiltration effect of the metal conductor is further improved.
8. The utility model provides an infiltration groove clears up easily, both can heat earlier the infiltration groove and arrange security protection cable waterproof glue behind the waterproof glue melting of security protection cable, also can cool down the waterproof glue of security protection cable earlier and remove with the metal spatula after recovering semisolid, cleans the clearance with the base oil that kinematic viscosity (40 ℃) is less than or equal to 20cst after cooling remaining security protection cable waterproof glue again.
Drawings
FIG. 1 is a schematic diagram of the overall architecture of the security cable processing system of the present application;
FIG. 2 is a schematic view of the overall construction of the infiltration apparatus;
FIG. 3 is a schematic longitudinal cross-sectional view of the infiltration apparatus;
FIG. 4 is a schematic cross-sectional view of an infiltration apparatus;
FIG. 5 is an enlarged schematic view of portion A of FIG. 3;
fig. 6 is an overall structural schematic diagram of a waterproof structure of the security cable of the present application;
FIG. 7 is a schematic structural view of a security cable manufactured in comparative example 1;
FIG. 8 is an enlarged view of a single piece of tin-plated copper prepared in example 1 taken in the longitudinal direction under an electron digital microscope;
FIG. 9 is a magnified view of the tin-plated copper prepared in example 1 in the transverse direction under an electron digital microscope;
FIG. 10 is a magnified view of the tin-plated copper prepared in comparative example 1 in the transverse direction under an electron digital microscope;
FIG. 11 is a schematic external view of the waterproof glue for security cables according to example 1 in a semi-solid state;
FIG. 12 is a schematic external view of the waterproof adhesive for security cables according to embodiment 1 in a semi-fluid state;
fig. 13 is an appearance schematic view of the security cable waterproof adhesive of embodiment 1 when the security cable waterproof adhesive is liquid.
Description of the reference numerals: 1. an unwinding device; 2. a preheating device; 3. an infiltration device; 31. soaking the tank; 311. a wire inlet; 312. an outlet; 32. a tension assembly; 321. a fixing member; 3211. a locking groove; 322. a connecting rod; 323. fixing the guide wheel; 33. a heating assembly; 331. a bottom heating plate; 332. a side heating plate; 4. an extrusion device; 5. a cooling device; 6. a winding device; 71. plating tin and copper; 72. a security cable; 721. a metal conductor; 722. a waterproof glue layer; 723. a plastic insulating layer; 8. a support frame; 9. a top cover; 1011. a mounting frame; 1012. a bolt; 102. positioning a guide wheel; 103. a transition guide wheel; 104. a traction device.
Detailed Description
The present application is described in further detail below with reference to figures 1-13 and examples.
The air tightness is one of important performances that a security cable should have, however, the security cable obtained by adopting the manual end-capping and dispensing process generally has the defect of poor air tightness, so that water vapor and the like in the air easily permeate into the metal conductor inside the security cable, and the transmission of digital information is influenced.
In order to solve the problem, the applicant carries out a great deal of research on the processing technology of the security cable, and finds a method capable of improving the air tightness of the security cable according to the drawing. As a result, the applicant has found that the airtightness of the security cable can be improved by heating the security cable waterproof adhesive prepared from polyolefin, a diluent, a high-temperature antioxidant and a coagulant and processing the metal conductor in a manner of immersing the metal conductor in the security cable waterproof adhesive, thereby successfully solving the technical problem to be solved by the present application. The present application has been made based on the above findings.
Specifically, the specific examples are taken as illustrations, and the raw materials in the examples are all purchased from markets, wherein:
the polyolefin is one or a combination of more of polybutylene 1400, polybutylene 2000, polybutylene 2200, polyisobutylene PB2400, polyisobutylene PB1300, polyisobutylene PB680, polyisobutylene PB300, polyisobutylene PB5T and polyisobutylene PB 950.
The diluent is one or a combination of more of 60N base oil, 250N base oil, PAO40, PAO60, 32# base oil, GTL base oil and N4016 naphthenic oil.
The high-temperature antioxidant is one or a combination of 168 antioxidant, 1010 antioxidant, 1076 antioxidant, 626 antioxidant and 1098 antioxidant.
The coagulant is one or more of EVA wax, PP wax, fischer-Tropsch wax and PE wax.
Examples
Example 1
s1: preparing a security cable waterproof adhesive:
s11: mixing 10kg of polyisobutylene PB2400, 50kg of polyisobutylene PB1300,5kg of 60N base oil and 25kg of 250N base oil, and stirring at 100 ℃ and 80rpm for 15min to ensure that the polyisobutylene PB2400, the polyisobutylene PB1300, the polyisobutylene PB 60N base oil and the 25kg of 250N base oil are uniform;
s12: adding 0.3kg of 168 antioxidant, 0.3kg of 1010 antioxidant and 0.4kg of 1076 antioxidant, stirring at 160 ℃ and 300rpm for 30min to dissolve the 168 antioxidant, the 1010 antioxidant and the 1076 antioxidant;
s13: adding 9kg of EVA wax, stirring at 138 ℃ and 500rpm for 3.5h to dissolve the EVA wax, and preparing the security cable waterproof adhesive;
s2: and heating the security cable waterproof glue to 150 ℃, and putting the tinned copper into the security cable waterproof glue for infiltration after the security cable waterproof glue is completely melted.
Referring to fig. 2 and 3, the wetting apparatus 3 includes a wetting tank 31, a tensioning assembly 32, and a heating assembly 33. Infiltration groove 31 is open-topped rectangular channel, and infiltration groove 31 is arranged in holding the security protection cable waterproof glue among the S2. The bottom of the infiltration tank 31 is fixedly connected with a support frame 8 for supporting the infiltration tank 31. The stainless steel top cover 9 is covered on the top of the infiltration tank 31, before the tinned copper 71 is infiltrated, the security cable waterproof glue can be added into the infiltration tank 31 by opening the top cover 9, and when the tinned copper 71 is infiltrated, the top cover 9 is covered to cover the opening on the top of the infiltration tank 31.
Referring to fig. 3, the upper portions of the two ends of the infiltration tank 31 are respectively provided with a wire inlet 311 and a wire outlet 312, the wire inlet 311 and the wire outlet 312 both penetrate through the sidewall of the infiltration tank 31, the wire inlet 311 allows the tin-plated copper 71 to penetrate into the infiltration tank 31, and the wire outlet 312 allows the tin-plated copper 71 to penetrate out of the infiltration tank 31.
Two positioning guide wheels 102 are arranged on the outer wall of the infiltration tank 31 close to one end of the wire inlet 311 and at the position of the wire inlet 311 in a rotating mode, the two positioning guide wheels 102 are arranged up and down and are matched with each other, and the tin-plated copper 71 can penetrate through the space between the two positioning guide wheels 102 and then penetrate into the infiltration tank 31 through the wire inlet 311.
Referring to fig. 4, the tension assembly 32 includes fixing members 321 respectively installed at two end portions of the wetting tank 31 and on the same side surface, and a connecting rod 322 fixedly connected between the two fixing members 321. The fixing member 321 is a substantially vertically disposed rod-shaped structure, and two ends of the connecting rod 322 are respectively and vertically and fixedly connected to the middle portions of the two fixing members 321.
The end parts of the two ends of the infiltration tank 31 and the side surface of the same side are fixedly connected with an L-shaped aluminum mounting rack 1011, one end of the mounting rack 1011 is fixedly connected to the edge of the top of the infiltration tank 31, and the other end of the mounting rack 1011 extends upwards and is in threaded connection with two bolts 1012. The length direction of the upper end of the fixing member 321 is provided with a locking groove 3211, the bolt 1012 passes through the locking groove 3211 and is in threaded connection with the mounting rack 1011, and the fixing member 321 is fixedly connected with the mounting rack 1011 through the bolt 1012 and the locking groove 3211, so that the fixing member 321 is mounted on the soaking groove 31.
The lower end of the fixing member 321 extends into the wetting groove 31, and the middle portion of the fixing member 321 bends downward after bending toward the side surface of the side far away from the mounting frame 1011 of the wetting groove 31, so that the lower end of the fixing member 321 is located in the middle portion of the wetting groove 31 and does not adhere to the side surface of the wetting groove 31. Five fixed guide wheels 323 for winding the tinned copper 71 (see fig. 3) are rotatably connected to the lower end of the fixing member 321 in the length direction, and the five fixed guide wheels 323 are distributed on the fixing member 321 at equal intervals. The circumferential side face of the fixed guide wheel 323 is recessed inwards and used for limiting the tinned copper 71. It should be noted that, in the present application, the fixing member 321 is provided with five fixed guide wheels 323, and in practical applications, the number of the fixed guide wheels 323 is not limited to five, and may be flexibly adjusted according to the depth of the infiltration tank 31, the distance between the fixed guide wheels 323, and other factors, such as three, four, six, seven, and so on.
Referring to fig. 3, after the tin-plated copper 71 penetrates into the infiltration tank 31 from the wire inlet 311, the tin-plated copper 71 firstly winds around the first fixed guide wheel 323 from top to bottom on the fixed member 321 near one end of the wire inlet 311, then winds around the first fixed guide wheel 323 from top to bottom on the fixed member 321 near one end of the wire outlet 312, then winds around the second fixed guide wheel 323 from top to bottom on the fixed member 321 near one end of the wire inlet 311, then winds around the … … on the second fixed guide wheel 323 from top to bottom on the fixed member 321 near one end of the wire outlet 312, and so on, and the tin-plated copper 71 is sequentially and alternately wound from top to bottom between the two fixed members 321 in a reciprocating manner. The tinned copper 71 finally winds the last fixed guide wheel 323 arranged on the fixed part 321 close to one side of the outlet 312 from top to bottom and then passes out of the outlet 312.
When the tin-plated copper 71 is transported from the inlet 311 to the outlet 312, each part of the tin-plated copper 71 enters the wetting tank 31 in sequence and then leaves the wetting tank 31. The tinned copper 71 is tensioned through the fixed guide wheels 323 and fixed in the infiltration tank 31, under the action of the fixed guide wheels 323, the tinned copper 71 is continuously wound on the two fixing pieces 321 back and forth, the length of the tinned copper 71 wound on the fixing pieces 321 is increased, namely, the stroke of the tinned copper 71 in the infiltration tank 31 is increased, so that the infiltration time of the tinned copper 71 in the infiltration tank 31 is increased under the condition that the length of the infiltration tank 31 is not prolonged, and the security cable waterproof glue is favorably promoted to enter the stranded tinned copper 71 along with the increase of the depth, and the security cable waterproof glue is more uniformly filled between the tinned copper 71 from outside to inside, so that the infiltration of the tinned copper 71 is more sufficient and efficient, and a better infiltration effect is achieved.
Preferably, the lower end of the fixing member 321 extends into the bottom of the wetting tank 31, so that the wetting depth of the tin-plated copper 71 is larger, the wetting pressure is larger, and the wetting efficiency is higher.
Preferably, the end parts of both ends of the infiltration tank 31 are rotatably connected with transition guide wheels 103, and the transition guide wheels 103 are rotatably connected to the side surfaces of the same side of the infiltration tank 31. The two transition guide wheels 103 are respectively positioned between the wire inlet 311 and the fixed guide wheel 323 at one end of the infiltration groove 31 close to the wire inlet 311, and between the wire outlet 312 and the fixed guide wheel 323 at one end of the infiltration groove 31 close to the wire outlet 312, and the two transition guide wheels 103 are basically as high as the wire inlet 311 and the wire outlet 312 so as to facilitate the transportation of the tinned copper 71.
Referring to fig. 4, the heating unit 33 includes a bottom heating plate 331 and two side heating plates 332. The area of the bottom heating plate 331 is substantially equal to the area of the bottom surface of the infiltration tank 31, and the bottom heating plate 331 covers the bottom surface of the infiltration tank 31 and is used for heating the security and protection cable waterproof adhesive at the bottom surface of the infiltration tank 31. The length of the side heating plates 332 is substantially equal to the length of the infiltration tank 31, the width of the side heating plates 332 is substantially half of the width of the infiltration tank 31, and the two side heating plates 332 are respectively attached to the lower portions of the two sides of the infiltration tank 31 and used for heating the security and protection cable waterproof glue at the lower portions of the two sides of the infiltration tank 31.
Preferably, the bottom surface and the two side surfaces of the infiltration tank 31 are coated with heat insulation layers for performing a heat insulation effect on the security cable waterproof adhesive so as to maintain the temperature of the security cable waterproof adhesive, which is not only beneficial to the stable infiltration of the tinned copper 71, but also beneficial to the reduction of heat loss.
The security and protection cable waterproof glue in the S2 is placed in the infiltration tank 31, the bottom heating plate 331 and the side heating plates 332 can heat the security and protection cable waterproof glue to 150 ℃, so that the security and protection cable waterproof glue is heated to be molten, the tin-plated copper 71 can be fully infiltrated, and the tin-plated copper 71 is wrapped on the surface of the tin-plated copper 71, the tin-plated copper 71 is filled, and the effect of improving the air tightness of the security and protection cable 72 (shown in figure 1) is achieved.
When the length of the infiltration tank 31 is 2 meters, and the infiltration tank 31 is filled with the security cable waterproof glue, the pressing linear speed of the tinned copper 71, namely the conveying speed of the tinned copper 71, can be controlled within 100-300m/min according to the difference of the wire gauge and the structure of the tinned copper 71, so that the air tightness of the security cable 72 can be more stable. For example, the wire gauge is 26AWG, the structure is 7/0.16 (7 strands, the diameter of each strand is 0.16 mm) tin-plated copper 71, the pressing line speed can be controlled to 300m/min; the wire gauge is 20AWG, the structure is tin-plated copper 71 of 26/0.16 (26 strands, the diameter of each strand is 0.16 mm), the line speed is controlled to be 230m/min; the wire gauge is 16AWG, the structure is 65/0.16 (65 strands, the diameter of each strand is 0.16 mm) tin-plated copper 71, and the pressing wire speed can be controlled to be 80m/min. The smaller the number of strands of the tin-plated copper 71, the easier the wetting becomes and the faster the pressing line speed becomes, and conversely, the larger the number of strands of the tin-plated copper 71, the harder the wetting becomes and the slower the pressing line speed becomes. When the pressing linear velocity is too fast, the infiltration time is too short, the melted security cable waterproof glue is difficult to fully infiltrate the stranded tinned copper 71, so that gaps exist among the tinned copper 71, the phenomenon of incomplete filling occurs, and then partial unqualified security cables 72 occur.
Referring to fig. 3 and 5, further, the inner diameter of the outlet 312 gradually decreases from the middle toward the end away from the inner wall of the infiltration groove 31, so that the inner wall of the outlet 312 away from one section of the infiltration groove 31 forms a taper with a continuously decreasing cross section, and the space of the tinned copper 71 passing through the outlet 312 is continuously decreased and the pressure is continuously increased, thereby extruding the security and protection cable waterproof adhesive into the stranded tinned copper 71, and achieving a better filling effect. Meanwhile, the smaller inner diameter of the outlet 312 can also remove the redundant security and protection cable waterproof glue on the tinned copper 71, so that the security and protection cable waterproof glue coated on the tinned copper 71 is more uniform.
Referring to fig. 1, the unwinding device 1 is an unwinding machine, the preheating device 2 is a preheating machine, the extrusion device 4 is an extrusion machine, the cooling device 5 is a cooling tank, the traction device 104 is a traction machine, and the winding device 6 is a winding machine. The processing process of the tinned copper 71 sequentially passes through the unreeling device 1, the preheating device 2, the infiltrating device 3, the extrusion device 4, the cooling device 5, the traction device 104 and the reeling device 6, and finally the whole processing process of the tinned copper 71 is completed, so that the security cable 72 filled with the security cable waterproof glue is manufactured. Because the tinned copper 71 passes through the preheating device 2 and then passes through the infiltration device 3, the tinned copper 71 is preheated before infiltration, the temperature is closer to the temperature of the security cable waterproof adhesive when the tinned copper 71 is infiltrated, and the infiltration effect of the tinned copper 71 is further improved.
The implementation principle of the security cable processing system and the waterproof structure of the security cable of the embodiment 1 is as follows: tinned copper 71 unreels from unwinding device 1 earlier in the course of working, then preheats through preheating device 2, soak through infiltration device 3 again, fill the waterproof glue of security protection cable, give as security line, cladding plastics insulating material are given as security protection cable 72 through giving as security out device 4 again, security protection cable 72 cools off through cooling device 5, draw through draw gear 104 again, at last get up security protection cable 72 through coiling mechanism 6, accomplish tinned copper 71's whole course of working.
Examples 2 to 6
Embodiments 2 to 6 all disclose a filling process of a security cable waterproof adhesive, which is different from embodiment 1 in that in S1, the raw material type and the raw material weight of the security cable waterproof adhesive are shown in table 1, and the preparation conditions are shown in table 2.
Table 1 raw material types and raw material weights of security and protection cable waterproof adhesives of examples 1 to 6
Table 2 preparation conditions of security cable waterproof glue of embodiments 1 to 6
Example 7
Example 8
Example 9
Embodiment 9 discloses a filling process of security cable waterproof glue, which is different from embodiment 1 in that in S2, the security cable waterproof glue is heated to 180 ℃.
Example 10
Comparative example 10 discloses a filling process of security cable waterproof glue, which is different from that of example 1 in that in S2, the security cable waterproof glue is heated to 130 ℃.
Comparative example
Comparative example 1
Comparative example 1 discloses an artificial end-capping dispensing process: the wire is extruded by a commercial waterproof glue machine, and the commercial waterproof glue is dispensed at the end part of the wire to obtain the security cable, as shown in fig. 7. Wherein the commercially available waterproof adhesive is an ultraviolet light curing adhesive, the main component of which is acrylate, the viscosity of which is 5000-7000 mPa.s, and the density of which is 1g/cm 3 。
Performance test
The security cables prepared in examples 1 to 10 and comparative example 1 were tested for air tightness. The test method comprises the following steps: clamping one end of a security cable in a closed cavity die, connecting the other end of the security cable into water, injecting gas with a pressure value simulating waterproof depth into the closed cavity through an air tightness tester (JC-TC-500S, excellent department of technology), and judging whether the security cable meets the waterproof grade requirement or not by means of pressure loss of the sealed cavity in unit time in the pressurizing and pressure maintaining process or observing whether bubbles are emitted from one end of the water. The length of the wire to be tested is 100mm, the pressure value is 3kPa, and the test time is 10s. When the end of the security cable immersed in water meets the air pressure of 300kPa and does not bubble for more than 10s or the actual leakage value is less than or equal to 300Pa, the security cable is qualified. The test results are shown in Table 3.
Table 3 test results of airtightness of security cables of examples 1 to 10 and comparative example 1
It can be seen by combining embodiment 1 and table 3 that the actual leakage value of the security cable prepared in embodiment 1 is 203Pa, which indicates that the air tightness of the security cable prepared in embodiment 1 is qualified, and proves that the air tightness of the security cable is effectively improved by the security cable waterproof glue filling process of the present application, and the security cable waterproof glue is filled into the security cable, so that water vapor is not easy to permeate into the security cable, and the water resistance of the security cable is better. As shown in fig. 8-9, after the security cable waterproof glue is infiltrated by the tinned copper, the security cable waterproof glue can be coated on the surface of the tinned copper and filled between the tinned copper, so that a gap between the tinned copper is blocked, and the effects of improving the air tightness and the water resistance of the security cable are achieved.
By combining the embodiment 1 and the comparative example 1 and combining the table 3, the actual leakage value of the security cable prepared by adopting the manual end-capping glue dispensing process in the comparative example 1 is 300kPa, and the air tightness test result is unqualified, which proves that the filling process of the security cable waterproof glue of the application is greatly improved, more excellent and more prominent compared with the existing manual end-capping glue dispensing process. As shown in fig. 10, gaps exist between the tinned copper, so that moisture and oxygen in the external environment easily permeate into and diffuse into the gaps, and thus the security cable prepared in comparative example 1 has poor air tightness.
By combining the embodiment 1 and the embodiments 2 to 6 and combining the table 3, it can be seen that, as in the embodiment 1, the air tightness test results of the security cables prepared in the embodiments 2 to 6 are all qualified, which indicates that the security cables with good air tightness can still be prepared by reasonably adjusting the preparation conditions of the security cable waterproof adhesive.
The security cable waterproof adhesive prepared in the embodiments 1 to 6 has high and low temperature performance of which the state changes along with the change of temperature, and taking the embodiment 1 as an example, as shown in fig. 11 to 13, the security cable waterproof adhesive is in a semi-solid state at normal temperature, gradually changes into a semi-fluid state after being heated, and is melted into a liquid after reaching high temperature. The high-low temperature performance of the security cable waterproof glue enables the viscosity of the security cable waterproof glue to be rapidly increased due to rapid reduction of temperature after the tinned copper soaked with the security cable waterproof glue leaves the soaking tank, the security cable waterproof glue is restored to be in a semi-fluid state after the temperature is lower than 130 ℃, the security cable waterproof glue is solidified back to be in an original homogeneous gel state after the temperature is lower than 90 ℃, and the security cable waterproof glue soaked and coated on the cable core can be effectively prevented from dripping and running off.
In addition, the inventor also performs other performance tests on the security cable waterproof glue prepared in the examples 1 to 6, and the test results show that the security cable waterproof glue prepared in the examples 1 to 6 has the solid content of 100% of effective substances, the dropping point of 81 to 146 ℃, the dynamic viscosity of 158 to 385mPas, the cone penetration (@ 25 ℃) of 60 to 151dmm, the density of 0.88 to 0.93g/ml and the oxidation induction period (@ 190 ℃,10 ℃, min) of 52-86min, relative dielectric constant (@ 50Hz,23 deg.C) of 2.19-2.29, and dielectric loss factor (1 MHz) of 7.8 × 10 -4 -9.8×10 -4 The volume resistivity (@ 20 ℃ C.) was 4.0X 10 14 -5.9×10 14 Omega. Cm, an acid value of 0.19 to 0.3mgKOH/g, and a compatibility (mass change rate) (70 ℃/240 h) of PVC: -0.07-1.01%; PE:0.34 to 4.21 percent; XLPE:0.44-4.63%, corrosion resistance (80 ℃,336 h) is the same as that of copper, aluminum and steel, and water resistance (168 h) is the same as that of the sample without disintegration.
The detection results all accord with the national standard, so the security cable waterproof glue prepared by the method is a product with excellent comprehensive performance, can provide good insulation, buffering, water resistance, moisture resistance and other effects for the security cable, is excellent in compatibility with plastic insulating materials, does not swell, is not oil-separating, has small acid value, strong corrosion resistance, does not emulsify, does not hydrolyze, and has excellent dielectric property and electrical property, the quality of the security cable is effectively improved, and the stability, reliability and use safety of the security cable digital information transmission are fully guaranteed.
It can be seen by combining example 1 and examples 7 to 9 and combining table 3 that the actual leakage values of the security cables prepared in examples 7 to 9 are all less than 300Pa and are much less than 203Pa of example 1, which fully indicates that when the heating temperature of the security cable waterproof adhesive is 160 to 180 ℃, the security cable waterproof adhesive has a better infiltration effect on the tinned copper, and the security cable has more excellent air tightness and is very remarkable. Meanwhile, the practical leakage value of the embodiment 1, the embodiment 7, the embodiment 8 and the embodiment 9 is gradually reduced along with the rise of the temperature, that is to say, the air tightness of the security cable and the heating temperature of the security cable waterproof glue are in negative correlation, and therefore the heating temperature of the security cable waterproof glue is increased, so that the air tightness of the security cable is improved. However, in practice, the heating temperature of the security cable waterproof adhesive is too high, so that the long-term stability and the oxidation resistance of the security cable are easily reduced, and the heating temperature of the security cable waterproof adhesive is not more than 180 ℃ through tests.
It can be seen by combining example 1 and example 10 and table 3 that, although the air tightness of the security cable prepared by heating the security cable waterproof adhesive to 130 ℃ in example 10 is qualified, the air tightness is inferior to that in example 1, because the heating temperature of the security cable waterproof adhesive is too low, the security cable waterproof adhesive is not completely melted, so that the tin-plated copper is not sufficiently infiltrated, and the air tightness is reduced, therefore, the heating temperature of the security cable waterproof adhesive is not lower than 150 ℃. It can be concluded by combining examples 7-10 that the heating temperature of the security cable waterproof adhesive is controlled above 150 ℃ and can be completely melted and fully infiltrated with the tin-plated copper, and preferably controlled at 160-180 ℃ to ensure that the tin-plated copper has good quality.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The utility model provides a security protection cable system of processing which characterized in that: the cable waterproof glue soaking device comprises a soaking device (3), wherein the soaking device (3) comprises a soaking groove (31) for containing waterproof glue of a security cable, and a tensioning assembly (32) for tensioning a metal conductor and a heating assembly (33) for heating the waterproof glue of the security cable are arranged in the soaking groove (31); the upper parts of two ends of the infiltration groove (31) are respectively provided with a wire inlet (311) and a wire outlet (312), the inner diameter of the wire outlet (312) is gradually reduced from the middle part to the direction far away from one end of the inner wall of the infiltration groove (31), and the inner wall of one section of the wire outlet (312) far away from the infiltration groove (31) forms a cone with the cross section being continuously reduced;
the bottom surface and the side surfaces at two sides of the infiltration groove (31) are coated with heat-insulating layers;
the heating assembly (33) comprises a bottom heating plate (331) and a side heating plate (332), the bottom heating plate (331) is arranged on the bottom surface of the soaking tank (31), and the side heating plate (332) is arranged on the side surface of the soaking tank (31);
the tensioning assembly (32) comprises fixing pieces (321) which are respectively installed at the end parts of two ends of the infiltration groove (31) and located on the same side face, the end parts of the two ends of the infiltration groove (31) are respectively fixedly connected with an L-shaped aluminum installation rack (1011) on the same side face, one end of the installation rack (1011) is fixedly connected to the top edge of the infiltration groove (31), the other end of the installation rack (1011) extends upwards and is in threaded connection with two bolts (1012), a locking groove (3211) is formed in the length direction of the upper end of the fixing piece (321), the bolts (1012) penetrate through the locking groove (3211) and are in threaded connection with the installation rack (1011), the fixing piece (321) is fixedly connected to the installation rack (321) through the bolts (1012) and the locking groove (3211), the lower end of the fixing piece (321) extends into the infiltration groove (31) and is provided with a plurality of fixing guide wheels (323), and metal conductors are sequentially wound on the fixing guide wheels (323) of the two fixing pieces (321) in a staggered manner;
the end parts of the two ends of the infiltration groove (31) are rotatably connected with transition guide wheels (103); the transition guide wheel (103) is as high as the wire inlet (311) and the wire outlet (312).
2. The security cable processing system of claim 1, wherein: the metal conductor is wound on the fixed guide wheel (323) from top to bottom.
3. The security cable processing system of claim 1, wherein: the security and protection cable processing system further comprises a preheating device (2), and the metal conductor is preheated by the preheating device (2) and then infiltrated by the infiltrating device (3).
4. The security cable processing system according to claim 1, wherein: the security and protection cable processing system further comprises an unwinding device (1), an extrusion device (4), a cooling device (5), a traction device (104) and a winding device (6), wherein the unwinding device (1), the preheating device (2), the soaking device (3), the extrusion device (4), the cooling device (5), the traction device (104) and the winding device (6) are sequentially arranged along the conveying direction of the metal conductor.
5. A filling process of a security cable waterproof adhesive is characterized in that the security cable processing system according to any one of claims 1 to 4 is adopted, and the filling process sequentially comprises the following steps according to a processing procedure:
s1: mixing polyolefin and a diluent, uniformly stirring, adding a high-temperature antioxidant, stirring until the high-temperature antioxidant is dissolved, adding a coagulant, and stirring until the coagulant is dissolved to obtain the security cable waterproof adhesive;
s2: and heating the security cable waterproof glue, and putting the metal conductor into the security cable waterproof glue for infiltration after the security cable waterproof glue is completely melted.
6. The filling process of the security cable waterproof adhesive according to claim 5, wherein the filling process comprises the following steps: and S2, heating the security cable waterproof adhesive to 160-180 ℃.
7. The filling process of the security cable waterproof adhesive according to claim 5, wherein the filling process comprises the following steps: s1, sequentially comprising the following steps according to a treatment process:
s11: mixing 45-70 parts by weight of polyolefin and 20-44 parts by weight of diluent, and stirring at 100-120 ℃ and 50-200rpm for 10-30min to ensure that the polyolefin and the diluent are uniform;
s12: adding 0.5-1.5 weight parts of high temperature antioxidant, stirring at 130-160 deg.C and 200-500rpm for 20-30min to dissolve the high temperature antioxidant;
s13: adding 9-14 parts by weight of coagulant, stirring at 130-180 ℃ and 300-800rpm for 3-5h to dissolve the coagulant, and obtaining the security cable waterproof adhesive.
8. The waterproof structure of the security cable manufactured by the filling process of the security cable waterproof adhesive according to claim 5 is characterized in that: the waterproof structure comprises a metal conductor (721), wherein a waterproof adhesive layer (722) is arranged on the surface of the metal conductor (721), and a plastic insulating layer (723) is arranged outside the waterproof adhesive layer (722).
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