CN114999738A - Fireproof flame-retardant cable and cladding device for production thereof - Google Patents
Fireproof flame-retardant cable and cladding device for production thereof Download PDFInfo
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- CN114999738A CN114999738A CN202210657578.9A CN202210657578A CN114999738A CN 114999738 A CN114999738 A CN 114999738A CN 202210657578 A CN202210657578 A CN 202210657578A CN 114999738 A CN114999738 A CN 114999738A
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- stuffing box
- retardant cable
- insulating layer
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- gear
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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
- H01B13/06—Insulating conductors or cables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
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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
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Insulated Conductors (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The invention relates to the technical field of cable processing, and discloses a fireproof flame-retardant cable which comprises a fireproof flame-retardant cable, wherein a wire core is arranged at the center of the fireproof flame-retardant cable, an insulating layer is coated on the surface of the wire core, seven groups of assembly bodies of the wire core and the insulating layer are arranged, six groups of circumference arrays are arranged on the outer side of the other group, a fireproof layer, an armor layer and a surface layer are sequentially coated on the outer sides of the seven groups of assembly bodies of the wire core and the insulating layer, and a filling part is filled in the fireproof layer. Through the removal of melting insulating layer material and heart yearn to the right side, the hydraulic pressure that the piston board received reduces, and pressure sensor transmits pressure signal to PLC controller again, and the servo motor increase rotational speed that the PLC controller is two connections of control gear again for the hydraulic pressure of packing box right-hand member department keeps dynamic stability, thereby ensures the effect of sinle silk cladding insulating layer. Therefore, the effects of ensuring the hydraulic stability of the contact part of the wire core and the molten insulating layer material and ensuring the coating effect of the wire core are achieved.
Description
Technical Field
The invention relates to the technical field of cable processing, in particular to a fireproof flame-retardant cable and a cladding device for producing the same.
Background
The cable is used for transmitting electric power, generally, the surface of a copper wire or an aluminum wire is coated with an insulating layer and a protective layer through the processes of metal drawing, stranding, coating, re-stranding, re-coating and the like in the processing process of the cable, and in the coating processing process of the cable, the conducting wire passes through an extruder, so that insulating glue solution in a molten state is attached to the conducting wire, and then coating is carried out.
In the cladding process, because copper line or aluminium wire move in the wire passing channel, drive the glue solution and remove, easily make melting glue solution internal pressure change to make the glue solution under unstable extrusion molding pressure, the surface of cladding copper line or aluminium wire makes the cladding effect worsen, the inhomogeneous condition appears on the surface of cladding.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a fireproof flame-retardant cable and a coating device for producing the same, which have the advantages of stable extrusion molding pressure, good coating effect and the like, and solve the problems of uneven extrusion molding pressure on molten glue and poor coating effect.
(II) technical scheme
In order to realize the purposes of stable extrusion pressure and good coating effect, the invention provides the following technical scheme:
a fireproof flame-retardant cable comprises a fireproof flame-retardant cable body, wherein a wire core is arranged in the center of the fireproof flame-retardant cable body, an insulating layer is wrapped on the surface of the wire core, seven groups of assembly bodies of the wire core and the insulating layer are arranged, six groups of circumference arrays are arranged on the outer side of the other group of circumference arrays, the outer sides of the seven groups of assembly bodies of the wire core and the insulating layer are sequentially wrapped with a fireproof layer, an armor layer and a surface layer, and a filling part is filled in the fireproof layer;
the processing technology of the surface layer comprises the following specific steps:
s1, weighing the components of the surface layer according to the parts by weight, namely low-density polyethylene: 20-30 parts of polyphenyl ether resin, 35-40 parts of azobenzene-4, 4-dicarboxylic acid: 18-22 parts of aluminum hydroxide, 20-25 parts of plant ash: 5-8 parts;
s2, stirring the components in the S1 at normal temperature and normal pressure, wherein the rotating speed is 1200r/min, stirring for 2-3h, then heating to 260-300 ℃, and stirring for 11-1.5h at normal pressure and 1800 r/min;
and S3, adding the raw materials stirred in the step S2 into an extruder, and coating the surface of the fireproof flame-retardant cable.
The cladding device for producing the fireproof flame-retardant cable comprises a stuffing box, wherein a cylindrical cavity is arranged inside the stuffing box, a material injection pipe is fixedly arranged at the top of the left side of the stuffing box, a conveying part is arranged inside the stuffing box, a sensing part and an opening and closing part are arranged inside the right end of the stuffing box, and the sensing part is positioned between the right end of the conveying part and the opening and closing part.
Preferably, conveying part changes the roller including rotating the hollow of connecting at the stuffing box left end, the skin weld of hollow commentaries on classics roller has helical blade, the left end fixed mounting who changes the roller is with gear one, the surface meshing of gear one has gear two, gear two rotates the left end of connecting at the stuffing box, the right-hand member cover that changes the roller is equipped with the lantern ring, the surface array of lantern ring is provided with the bracing piece, the other end fixed mounting of bracing piece is on the inner wall of stuffing box, the inner wall array that changes the roller is provided with the ball, and the ball that the circumference array set up on hollow commentaries on classics roller inner wall is a set of, the inside that changes the roller has set gradually three groups from a left side to the right side.
Preferably, the left end of the hollow rotating roller is provided with a horn mouth, the right end of the hollow rotating roller is provided with a conical head part, the conical head part is in a hollow conical shape, a cavity at the right end of the packing box is provided with a contraction part matched with the conical head part, and the right end of the packing box is provided with a discharge hole communicated with the contraction part.
Preferably, the helical blade gradually decreases in pitch from left to right, and the diameter of the helical blade is matched with the cavity of the stuffing box.
Preferably, the sensing part is including setting up the piston plate in the inside of stuffing box, the piston groove that is the slope form has been seted up to inside and being located the constriction portion inner wall of stuffing box, the quantity of piston groove is two to be located the upper and lower side of hollow commentaries on classics roller right-hand member, piston plate sliding connection is inside the piston plate, the opening part of piston groove is provided with the stopper, one side fixed mounting that the piston plate is close to the piston groove terminal surface has the connecting plate, the connecting plate runs through the stuffing box and extends to the outside of stuffing box, fixed mounting has the spring between the terminal surface of piston plate and piston groove, the one end butt that the piston plate was kept away from to the connecting plate has pressure sensor, pressure sensor fixed mounting is on the surface of stuffing box.
Preferably, the opening and closing part comprises a turntable arranged inside the right end of the packing box, a mounting groove is formed in the packing box and on the inner wall of the discharge hole, a through hole matched with the discharge hole is formed in the center of the turntable, the turntable is rotatably connected to the right side wall of the mounting groove, an arc-shaped groove is formed in the left side of the turntable in an array mode, the arc center of the arc-shaped groove is staggered with the axis of the discharge hole, a sliding column is slidably connected to the left side of the turntable, which is positioned inside the arc-shaped groove, a baffle is fixedly arranged in the middle of the sliding column, the baffle is composed of a square plate and a triangular plate, an arc-shaped part is arranged at the tip end of the baffle close to the axis of the discharge hole, a wire groove is formed in the left side wall of the mounting groove in a circumferential array mode, the other end of the sliding column is slidably connected inside the wire groove, and a gear III is fixedly arranged on the circumferential surface of the turntable, and a fourth gear is meshed with the rear side of the third gear.
Preferably, fixed mounting has the arc piece on the left side wall of mounting groove, the arc piece is located between carousel and the mounting groove left side wall, the middle part fixed mounting of arc piece is on the left side wall of mounting groove, the arc piece is kept away from its arc heart one side butt and has two spacing posts, the both ends of arc piece butt respectively on the inclined plane of two adjacent baffles.
Preferably, a rotating shaft is fixedly mounted at the center of the fourth gear, penetrates through the stuffing box and extends to the right side of the stuffing box, a servo motor is fixedly mounted at the rotating shaft, another servo motor is arranged at the center of the second gear, the pressure sensor is in signal connection with a PLC (programmable logic controller), and the output end of the PLC is in signal connection with the two servo motors.
(III) advantageous effects
Compared with the prior art, the invention provides a fireproof flame-retardant cable and a cladding device for producing the same, which have the following beneficial effects:
1. the fireproof flame-retardant cable and the coating device for producing the same have the advantages that the spiral blade rotates along the hollow rotating roller, the molten insulating layer material in the packing box is conveyed towards the right side, the pressure of the molten insulating layer material is increased, the pressure at the right end of the packing box is increased, the piston plate moves towards the end face of the piston groove along the inner wall of the piston groove under the action of hydraulic pressure, the spring is compressed to accumulate elastic potential energy, the connecting plate moves along the piston plate and extrudes the surface of the pressure sensor, the pressure sensor transmits a pressure signal to the PLC controller, when the pressure applied to the pressure sensor reaches a preset value, the PLC controller controls the servo motor connected with the gear four to be started to drive the gear four to rotate, the meshing action of the gear four and the gear three is matched to drive the turntable to rotate, the sliding column is extruded through the side wall of the arc groove formed in the turntable, so that the sliding column slides along the wire groove formed in the left side wall of the mounting groove, the baffle is far away from the discharge hole along with the sliding column, so that the discharge hole is exposed, and the wire core and the molten insulating layer material penetrate out from the discharge hole. Through melting insulating layer material and heart yearn to the right side removal, the hydraulic pressure that the piston board received reduces, and pressure sensor transmits pressure signal to PLC controller again, and the servo motor increase rotational speed that gear two are connected is controlled again to the PLC controller for the hydraulic pressure of stuffing box right-hand member department keeps the dynamic stability, thereby ensures the effect of sinle silk cladding insulating layer. Therefore, the effects of ensuring the hydraulic stability of the contact part of the wire core and the molten insulating layer material and ensuring the coating effect of the wire core are achieved.
2. This cladding device of fire prevention flame retarded cable and production usefulness thereof passes through from the inside of hollow commentaries on classics roller through the sinle silk, only at shrink portion and discharge gate department cladding insulating layer for sinle silk and melting insulating layer contact time are short, and the sinle silk is stable can not heat up because of the heat transfer of melting insulating layer material by a wide margin, makes the difference in temperature between sinle silk and the melting insulating layer great, makes the insulating layer material on sinle silk surface can solidify sooner, can reduce follow-up insulating layer cooling time. Thereby achieving the effect of reducing the cooling time of the insulating layer.
3. This cladding device of fire prevention flame retarded cable and production usefulness thereof, at the wire core processing completion, or when shutting down, the piston plate is under the elastic action of spring, move to the constriction along the piston groove, promote the inside melting insulating layer material that gets into the piston groove and flow in to the constriction, thereby make the melting insulating layer material of packing box right-hand member flow to left side miniascape, the melting insulating layer material that drives in the discharge opening is followed and is moved left, prevent that the packing box from gathering too much insulating layer material in discharge opening right-hand member department, and cooperation carousel antiport, it seals the discharge opening to drive the baffle, it takes place the drippage to restrain packing box right-hand member melting insulating layer material, cause the waste of material, thereby reach when shutting down, automatic backward flow of packing box tip melting insulating layer material, prevent the effect of drippage.
Drawings
FIG. 1 is a schematic sectional view of a fire-retardant cable and a covering device for producing the same;
FIG. 2 is a schematic perspective view of a fire-retardant cable and a covering device for producing the same according to the present invention;
FIG. 3 is a schematic perspective view of a spiral blade of a fire-proof and flame-retardant cable and a covering device for producing the same according to the present invention;
FIG. 4 is a schematic cross-sectional view of an idle roller of a fireproof flame-retardant cable and a covering device for producing the same according to the present invention;
FIG. 5 is a schematic sectional view of a fire-retardant cable and a sensing part and an opening/closing part of a covering device for producing the fire-retardant cable;
fig. 6 is an enlarged structural diagram of a detail a in fig. 1 of a fireproof flame-retardant cable and a covering device for producing the same according to the present invention.
Fig. 7 is a schematic perspective view of a fire-proof and flame-retardant cable and a covering device for producing the same at a baffle plate;
FIG. 8 is a schematic diagram of a right-side sectional perspective view of a turntable of a fireproof flame-retardant cable and a cladding device for producing the same according to the present invention;
fig. 9 is a schematic cross-sectional structure view of a fireproof flame-retardant cable and a cladding device for producing the same according to the present invention.
In the figure: 1. a stuffing box; 2. a material injection pipe; 3. a conveying member; 4. a sensing component; 5. an opening/closing member; 6. a fire-resistant and flame-retardant cable; 11. a constriction; 12. a discharge hole; 31. hollow rotating rollers; 32. a helical blade; 33. a first gear; 34. a second gear; 35. a collar; 36. a support bar; 37. a ball bearing; 311. a bell mouth; 312. a conical head portion; 41. a piston plate; 42. a piston groove; 43. a limiting block; 44. a connecting plate; 45. a spring; 46. a pressure sensor; 51. a turntable; 52. mounting grooves; 53. an arc-shaped slot; 54. a traveler; 55. a baffle plate; 551. an arc-shaped portion; 56. a wire slot; 57. an arc-shaped sheet; 571. a limiting column; 58. a third gear; 59. a fourth gear; 61. a wire core; 62. an insulating layer; 63. a fire barrier layer; 64. a filling section; 65. an armor layer; 66. a surface layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2 and 5, a covering device for producing a fireproof and flame-retardant cable comprises a stuffing box 1, a cylindrical cavity is arranged inside the stuffing box 1, a material injection pipe 2 is fixedly arranged at the top of the left side of the stuffing box 1 and is connected with the material injection pipe 2 through an extruding machine, and a molten insulating layer material is conveyed into the stuffing box 1. The inside of stuffing box 1 is provided with conveyor components 3, carry the inside melting insulating layer material of stuffing box 1 from a left side to the right side through conveyor components 3, the inside sensing part 4 and the switching part 5 of being provided with of stuffing box 1 right-hand member, sensing part 4 is located between 3 right-hand members of conveyor components and the switching part 5, utilize sensing part 4 to monitor the inside pressure of stuffing box 1 right-hand member, sensing part 4 signal connection has the PLC controller, feed back pressure to the PLC controller through sensing part 4, again through the switching of PLC controller control conveyor components 3 transmission rate and switching part 5, thereby the pressure of the inside melting insulating layer material of regulation stuffing box 1.
Please refer to fig. 1-4, the conveying component 3 includes a hollow rotating roller 31 rotatably connected to the left end of the stuffing box 1, the left end of the hollow rotating roller 31 is provided with a bell mouth 311, which facilitates the insertion of the core of the cable into the hollow rotating roller 31, the right end of the hollow rotating roller 31 is provided with a cone head 312, the cone head 312 is in a hollow conical shape, the core of the cable is guided, the core of the cable is conveniently penetrated out from the hollow rotating roller 31, and the inner diameter of the core is gradually reduced from left to right through the cone head 312, so that the core of the cable is more stably located on the axis of the hollow rotating roller 31 when the core of the cable penetrates out from the right end of the hollow rotating roller 31. The cavity of the right end of the stuffing box 1 is provided with a contraction part 11 matched with the conical head part 312, and the right end of the stuffing box 1 is provided with a discharge hole 12 communicated with the contraction part 11. The surface of the hollow rotating roller 31 is welded with a helical blade 32, the pitch of the helical blade 32 is gradually reduced from left to right, and the diameter of the helical blade 32 is matched with the cavity of the stuffing box 1. Thus, when the assembly of the hollow rotating roll 31 and the spiral blade 32 rotates, the spiral blade 32 applies pressure to the molten insulating layer material while conveying the molten insulating layer material to the right side, thereby increasing the pressure of the molten insulating layer material. Hollow roller 31's left end fixed mounting has gear 33, gear 33's surface engagement has gear 34 two, gear 34 rotates the left end of connecting at stuffing box 1, hollow roller 31's right-hand member cover is equipped with lantern ring 35, the surface array of lantern ring 35 is provided with bracing piece 36, the other end fixed mounting of bracing piece 36 is on stuffing box 1's inner wall, hollow roller 31's inner wall array is provided with ball 37, the circumference array sets up ball 37 on hollow roller 31 inner wall as a set of, hollow roller 31's inside has set gradually three groups from a left side to the right side. The wire cores inside the hollow rotating roller 31 are clamped and limited through the balls 37, so that the wire cores are stably conveyed from the axle center of the hollow rotating roller 31 from left to right.
Referring to fig. 1-4, the sensing component 4 includes a piston plate 41 disposed inside the stuffing box 1, inclined piston grooves 42 are disposed inside the stuffing box 1 and on the inner wall of the contraction portion 11, the number of the piston grooves 42 is two and is located on the upper and lower sides of the right end of the hollow roller 31, the piston plate 41 is slidably connected inside the piston plate 41, a stopper 43 is disposed at an opening of the piston groove 42, and the stopper 43 blocks the piston plate 41 to prevent the piston plate 41 from separating from the piston groove 42 and entering the contraction portion 11. A connecting plate 44 is fixedly mounted on one side of the piston plate 41 close to the end face of the piston groove 42, the connecting plate 44 penetrates through the stuffing box 1 and extends to the outer side of the stuffing box 1, a spring 45 is fixedly mounted between the piston plate 41 and the end face of the piston groove 42, and the spring 45 is a high-temperature-resistant spring and is made of 30W4Cr 2V. The end of the connecting plate 44 away from the piston plate 41 is abutted with a pressure sensor 46, the pressure sensor 46 is fixedly installed on the surface of the stuffing box 1, and the pressure sensor 46 is inclined and is perpendicular to the connecting plate 44. By arranging the pressure sensor 46 outside the stuffing box 1, the pressure sensor 46 is prevented from being affected by high temperatures inside the stuffing box 1.
Referring to fig. 5-8, the opening and closing member 5 includes a rotating disc 51 disposed inside the right end of the packing box 1, a mounting groove 52 is disposed inside the packing box 1 and on the inner wall of the discharge hole 12, a through hole adapted to the discharge hole 12 is disposed at the center of the rotating disc 51, the rotating disc 51 is rotatably connected to the right side wall of the mounting groove 52, an arc-shaped groove 53 is disposed on the left side of the rotating disc 51, the arc center of the arc-shaped groove 53 is staggered with the axis of the discharge hole 12, a sliding column 54 is slidably connected inside the arc-shaped groove 53 at the left side of the rotating disc 51, a baffle 55 is fixedly disposed at the middle of the sliding column 54, the baffle 55 is composed of a square plate and a triangular plate, an arc portion 551 is disposed at the tip of the baffle 55 near the axis of the discharge hole 12, a line slot 56 is disposed on the circumference of the left side wall of the mounting groove 52 inside the packing box 1, and the other end of the sliding column 54 is slidably connected to the line slot 56, therefore, when the turntable 51 rotates, the sliding column 54 slides in the line groove 56 formed in the left side wall of the mounting groove 52 under the extrusion action of the side wall of the arc-shaped groove 53 formed in the turntable 51, so that the baffle 55 is inserted into the discharge hole 12 or separated from the discharge hole 12, and the discharge hole 12 is opened and closed. And through the setting of arc portion 551, when baffle 55 inserts in discharge opening 12, the laminating is on the surface of sinle silk, dodges the sinle silk.
Referring to fig. 7-8, an arc-shaped piece 57 is fixedly mounted on the left side wall of the mounting groove 52, the arc-shaped piece 57 is located between the turntable 51 and the left side wall of the mounting groove 52, the middle portion of the arc-shaped piece 57 is fixedly mounted on the left side wall of the mounting groove 52, the arc-shaped piece 57 is made of 65Mn steel, two limiting columns 571 are abutted to one side of the arc-shaped piece 57 away from the arc center, and two ends of the arc-shaped piece 57 are abutted to the inclined surfaces of two adjacent baffle plates 55 respectively. The arc-shaped piece 57 and the baffle 55 are matched with each other to shield a gap between the rotary disc 51 and the left side wall of the mounting groove 52, and the molten insulating layer material is inhibited from entering the gap. A third gear 58 is fixedly mounted on the circumferential surface of the turntable 51, and a fourth gear 59 is engaged with the rear side of the third gear 58. The center department fixed mounting of gear four 59 has a pivot, and the pivot runs through stuffing box 1 and extends to the right side of stuffing box 1, and pivot fixed mounting has servo motor, and the center department of gear two 34 is provided with another servo motor, and pressure sensor 46 signal connection has the PLC controller, the output and two servo motor signal connection of PLC controller.
Referring to fig. 9, the fireproof flame-retardant cable 6 produced by the device includes a wire core 61, the surface of the wire core 61 is coated with an insulating layer 62, the insulating layer 62 is made of polyethylene, seven groups of assemblies of the wire core 61 and the insulating layer 62 are arranged, six groups of circumference arrays are arranged outside the other group, the seven groups of assemblies of the wire core 61 and the insulating layer 62 are sequentially coated with a fireproof layer 63, an armor layer 65 and a surface layer 66, the fireproof layer 63 is made of mica, and the armor layer 65 is made of steel wire mesh. The interior of the fireproof layer 63 is filled with a filling portion 64, and the filling portion 64 is made of aluminum hydroxide.
The processing technology of the surface layer 66 comprises the following specific steps:
s1, weighing the components of the surface layer 66 according to the parts by weight, namely low-density polyethylene: 20-30 parts of polyphenyl ether resin, 35-40 parts of azobenzene-4, 4-dicarboxylic acid: 18-22 parts of aluminum hydroxide, 20-25 parts of plant ash: 5-8 parts;
s2, stirring the components in the S1 at normal temperature and normal pressure, wherein the rotating speed is 1200r/min, stirring for 2-3h, then heating to 260-300 ℃, and stirring for 11-1.5h at normal pressure and 1800 r/min;
and S3, adding the raw materials stirred in the step S2 into an extruder, and coating the surface of the fireproof flame-retardant cable.
The working principle is as follows: the sinle silk of cable passes from the inside of hollow commentaries on classics roller 31 to in the right-hand member entering constriction 11 and discharge opening 12 of hollow commentaries on classics roller 31, and wear out from discharge opening 12, the sinle silk is when passing constriction 11 and discharge opening 12 department, and the cladding of fused insulating layer material is on the sinle silk surface, and at first, baffle 55 is in mounting groove 52 and insert discharge opening 12 in, and the tip of baffle 55 passes through arc 551 laminating on the surface of sinle silk, seals discharge opening 12.
The plastic extruding machine adds the melted insulating layer material into the left end of the stuffing box 1 through the material injection pipe 2, then drives the gear II 34 to rotate through a servo motor, and drives the assembly body of the gear I33 and the hollow rotating roller 31 to rotate by matching with the meshing action of the gear II 34 and the gear I33, the helical blade 32 rotates along the hollow rotating roller 31, the melted insulating layer material in the stuffing box 1 is conveyed towards the right side and the pressure of the melted insulating layer material is increased, the pressure at the right end of the stuffing box 1 is increased, the piston plate 41 moves towards the end surface of the piston groove 42 along the inner wall of the piston groove 42 under the action of hydraulic pressure, the spring 45 is compressed to accumulate elastic potential energy, the connecting plate 44 moves along the piston plate 41 and extrudes the surface of the pressure sensor 46, the pressure sensor 46 transmits a pressure signal to the PLC controller, when the pressure received by the pressure sensor 46 reaches a preset value, the PLC controller controls the servo motor connected with the gear IV 59 to start, the fourth gear 59 is driven to rotate, the fourth gear 59 and the third gear 58 are meshed to drive the rotary table 51 to rotate, the sliding column 54 is extruded through the side wall of the arc-shaped groove 53 formed in the rotary table 51, the sliding column 54 slides along the line groove 56 formed in the left side wall of the mounting groove 52, the baffle 55 is far away from the discharge hole 12 along with the sliding column 54, the discharge hole 12 is exposed, and the wire core and the molten insulating layer material penetrate out of the discharge hole 12.
Through melting insulating layer material and heart yearn to the right side removal, the hydraulic pressure that piston plate 41 received reduces, and pressure sensor 46 transmits pressure signal to the PLC controller again, and the servo motor increase rotational speed that two 34 of gear are connected is controlled again to the PLC controller for the hydraulic pressure of the right-hand member department of stuffing box 1 keeps dynamic stability, thereby ensures the effect of sinle silk cladding insulating layer.
And the wire core passes through the hollow roller 31, and only the insulating layer is coated at the contraction part 11 and the discharge hole 12, so that the contact time of the wire core and the molten insulating layer is short, the wire core is stable and cannot be greatly heated due to the heat transfer of the molten insulating layer material, the temperature difference between the wire core and the molten insulating layer is large, the insulating layer material on the surface of the wire core can be rapidly solidified, and the cooling time of the subsequent insulating layer can be reduced.
In addition, when the processing of the wire core is completed, or when the machine is stopped, the piston plate 41 moves to the contraction part 11 along the piston groove 42 under the elastic action of the spring 45, and the molten insulating layer material entering the inside of the piston groove 42 is pushed to flow into the contraction part 11, so that the molten insulating layer material at the right end of the stuffing box 1 flows to the left in a small range, the molten insulating layer material in the discharge hole 12 is driven to move leftwards, excessive insulating layer material is prevented from being gathered at the right end of the discharge hole 12 by the stuffing box 1, and the baffle 55 is driven to seal the discharge hole 12 in a reverse rotation manner by matching with the turntable 51, so that the molten insulating layer material at the right end of the stuffing box 1 is prevented from dripping, and the material is wasted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A fireproof flame-retardant cable is characterized in that: the fireproof flame-retardant cable comprises a fireproof flame-retardant cable (6), wherein a wire core (61) is arranged at the center of the fireproof flame-retardant cable (6), an insulating layer (62) is coated on the surface of the wire core (61), seven groups of assemblies of the wire core (61) and the insulating layer (62) are arranged, six groups of circumference arrays are arranged on the outer side of the other group, seven groups of assemblies of the wire core (61) and the insulating layer (62) are sequentially coated with a fireproof layer (63), an armor layer (65) and a surface layer (66), and a filling part (64) is filled in the fireproof layer (63);
the processing technology of the surface layer (66) comprises the following specific steps:
s1, weighing the components of the surface layer (66) according to the parts by weight: 20-30 parts of polyphenyl ether resin, 35-40 parts of azobenzene-4, 4-dicarboxylic acid: 18-22 parts of aluminum hydroxide, 20-25 parts of plant ash: 5-8 parts;
s2, stirring the components in the S1 at normal temperature and normal pressure, wherein the rotating speed is 1200r/min, stirring for 2-3h, then heating to 260-300 ℃, and stirring for 11-1.5h at normal pressure and 1800 r/min;
and S3, adding the raw materials stirred in the step S2 into an extruder, and coating the surface of the fireproof flame-retardant cable.
2. The utility model provides a cladding device of fire prevention flame retarded cable production usefulness, includes stuffing box (1), the inside of stuffing box (1) is provided with cylindric cavity, the left top fixed mounting of stuffing box (1) has notes material pipe (2), the inside of stuffing box (1) is provided with conveying part (3), inside sensing part (4) and the switching part (5) of being provided with of right-hand member of stuffing box (1), sensing part (4) are located between conveying part (3) right-hand member and switching part (5).
3. The covering device for producing the fireproof flame-retardant cable according to claim 2, wherein: the conveying component (3) comprises a hollow rotating roller (31) which is rotatably connected with the left end of the stuffing box (1), the surface of the hollow rotating roller (31) is welded with a helical blade (32), the left end of the hollow rotating roller (31) is fixedly provided with a first gear (33), a second gear (34) is meshed with the surface of the first gear (33), the second gear (34) is rotatably connected to the left end of the stuffing box (1), a lantern ring (35) is sleeved at the right end of the hollow rotating roller (31), supporting rods (36) are arranged on the surface of the lantern ring (35) in an array manner, the other end of the supporting rod (36) is fixedly arranged on the inner wall of the stuffing box (1), the inner wall array of hollow commentaries on classics roller (31) is provided with ball (37), and ball (37) that the circumference array set up on hollow commentaries on classics roller (31) inner wall are a set of, the inside of hollow commentaries on classics roller (31) has set gradually three groups from a left side to the right side.
4. The covering device for producing the fireproof flame-retardant cable according to claim 3, wherein: the left end of hollow commentaries on classics roller (31) is provided with horn mouth (311), the right-hand member of hollow commentaries on classics roller (31) is provided with conical head portion (312), conical head portion (312) are hollow circular cone form, the cavity department of gland box (1) right-hand member is provided with constriction part (11) with conical head portion (312) looks adaptation, the right-hand member of gland box (1) is provided with discharge opening (12) with constriction part (11) intercommunication.
5. The covering device for producing the fireproof flame-retardant cable according to claim 3, wherein: the pitch of the spiral blade (32) is gradually reduced from left to right, and the diameter of the spiral blade (32) is matched with the cavity of the stuffing box (1).
6. The covering device for producing the fireproof flame-retardant cable according to claim 2, wherein: the sensing part (4) comprises a piston plate (41) arranged inside the stuffing box (1), inclined piston grooves (42) are formed in the inner wall of the contraction part (11) inside the stuffing box (1), the number of the piston grooves (42) is two, the piston grooves are arranged on the upper side and the lower side of the right end of the hollow rotating roller (31), the piston plate (41) is connected inside the piston plate (41) in a sliding mode, a limiting block (43) is arranged at the opening of each piston groove (42), a connecting plate (44) is fixedly installed on one side, close to the end face of each piston groove (42), of each piston plate (41), the connecting plate (44) penetrates through the stuffing box (1) and extends to the outer side of the stuffing box (1), a spring (45) is fixedly installed between the end faces of the piston plate (41) and the piston groove (42), and one end, far away from the piston plate (41), of the connecting plate (44) abuts against a pressure sensor (46), the pressure sensor (46) is fixedly arranged on the surface of the stuffing box (1).
7. The covering device for producing the fireproof flame-retardant cable according to claim 2, wherein: the opening and closing component (5) comprises a turntable (51) arranged inside the right end of the packing box (1), a mounting groove (52) is formed in the packing box (1) and located on the inner wall of the discharge hole (12), a through hole matched with the discharge hole (12) is formed in the center of the turntable (51), the turntable (51) is rotatably connected to the right side wall of the mounting groove (52), arc-shaped grooves (53) are formed in the left side of the turntable (51) in an array mode, the arc centers of the arc-shaped grooves (53) are staggered with the axis of the discharge hole (12), a sliding column (54) is slidably connected to the left side of the turntable (51) and located inside the arc-shaped grooves (53), a baffle plate (55) is fixedly installed in the middle of the sliding column (54), the baffle plate (55) is composed of a square plate and a triangular plate, and a tip end portion (551) is arranged at the position, close to the axis of the discharge hole (12), of the baffle plate (55), wire grooves (56) are formed in the packing box (1) and located on the left side wall of the mounting groove (52) in a circumferential array mode, the other end of the sliding column (54) is connected into the wire grooves (56) in a sliding mode, a third gear (58) is fixedly mounted on the circumferential surface of the rotary disc (51), and a fourth gear (59) is meshed with the rear side of the third gear (58).
8. The covering device for producing the fireproof flame-retardant cable according to claim 7, wherein: the mounting structure is characterized in that an arc-shaped piece (57) is fixedly mounted on the left side wall of the mounting groove (52), the arc-shaped piece (57) is located between the turntable (51) and the left side wall of the mounting groove (52), the middle of the arc-shaped piece (57) is fixedly mounted on the left side wall of the mounting groove (52), one side, far away from an arc center, of the arc-shaped piece (57) is abutted to two limiting columns (571), and two ends of the arc-shaped piece (57) are abutted to inclined surfaces of two adjacent baffles (55) respectively.
9. The covering device for producing the fireproof flame-retardant cable according to claim 7, wherein: the center department fixed mounting of gear four (59) has a pivot, the pivot runs through stuffing box (1) and extends to the right side of stuffing box (1), pivot fixed mounting has servo motor, the center department of gear two (34) is provided with another servo motor, pressure sensor (46) signal connection has the PLC controller, the output and two servo motor signal connection of PLC controller.
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| CN114999738B (en) | 2023-01-24 |
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