CN116013592A - Cable core unit, fire-resistant trailing cable for firefighting elevator and manufacturing method of fire-resistant trailing cable - Google Patents
Cable core unit, fire-resistant trailing cable for firefighting elevator and manufacturing method of fire-resistant trailing cable Download PDFInfo
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- CN116013592A CN116013592A CN202211676078.6A CN202211676078A CN116013592A CN 116013592 A CN116013592 A CN 116013592A CN 202211676078 A CN202211676078 A CN 202211676078A CN 116013592 A CN116013592 A CN 116013592A
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Abstract
The application discloses cable core unit, fire-resistant retinue cable for fire elevator and manufacturing method thereof adopts the fire-resistant retinue cable for fire elevator that this application provided, can guarantee fire elevator normal operating's fire-resistant retinue cable under the conflagration circumstances, especially fire elevator well still can guarantee fire elevator power supply and control transmission characteristic under overheated or direct face conflagration influence circumstances, guarantees fire elevator car normal operating, improves fire safety, reduces people's life loss. The defect that the conventional travelling cable for the firefighting elevator does not have fire resistance or has certain fire resistance but has short service life is overcome, the fire resistance of the travelling cable for the firefighting elevator car can be greatly improved, the enough service life is ensured, and the fire operation reliability of the firefighting elevator is improved.
Description
Technical Field
The application relates to the technical field of fire-fighting elevator components, in particular to a cable core unit, a fire-resistant trailing cable for a fire-fighting elevator and a manufacturing method thereof.
Background
The elevator travelling cable is an important part of a vertical lifting elevator and is provided with the functions of controlling a lift car, transmitting electric power and communication signals, and the cable installation mode is freely suspended on the whole lifting height of the elevator so as to ensure that the elevator is completely following the vertical movement of the elevator, so that the bending performance of the travelling cable such as the service life, the bending diameter and the like are required, and the insulation and the sheath materials of the cable are made of plastic elastomer materials generally.
The fire-fighting elevator is an elevator which is used for fire fighters to extinguish and rescue when a building breaks out a fire and has a certain function, and the common passengers have to stop running when the elevator is required to break out the fire, so that the fire-fighting elevator has a very important meaning on the safety of high-rise buildings, has very high fireproof requirements, and has very important fireproof design. The power supply cable of the existing fire-fighting elevator adopts high-grade fire-resistant cables, but the following cable only adopts the following cable which is the same as the common elevator because the following cable needs to consider the characteristics of the following bending service life, the diameter and the like, and does not have the fire resistance performance which normally works during combustion. The prior art can not solve the problem that the fire-resistant and bending characteristics are combined with materials or structures, and the travelling cable becomes a great difficulty in further improving the fire-resistant grade of the power supply and control system of the fire-fighting elevator.
In order to ensure the normal operation function of the fire elevator in a fire disaster, the current industry solutions have only one of: the elevator is operated in the fire disaster by arranging an independent elevator shaft, improving the fire protection level of a well and a door and resisting the influence of the fire disaster on a fire-fighting elevator component system through a building structure, but in the actual fire disaster, if the fire disaster surface is large, the temperature rise of the whole structure possibly exceeds the softening temperature of the insulation and sheath materials of the travelling cable, and the fire-fighting elevator well can be affected by the disaster under extreme conditions, so that the fire-fighting elevator cannot work.
The applicant insists on research and development to really meet fire-fighting safety requirements of the fire-resistant trailing cable, in the patent technology of publication No. CN216901071U obtained by the applicant, a tank chain-like reinforcing frame is adopted, and rubber insulating materials are filled in the reinforcing frame to ensure bending characteristics and fire-resistant characteristics of the trailing cable, but the technical scheme has three obvious defects, namely the reliability and the service life of the reinforcing frame, and the service life of the elevator under the condition of non-fire at ordinary times is influenced; secondly, the fire-resistant characteristic of the rubber filling material is too low in bending movement life time in a fire scene, only about 10 times of reciprocating bending can be provided, and more operation needs are difficult to ensure.
Disclosure of Invention
The main object of the present application is to provide a cable core unit, a fire-resistant trailing cable for fire-fighting elevator and a manufacturing method thereof, so as to solve the current problems.
In order to achieve the above object, the present application provides the following techniques:
a first aspect of the present application provides a cable core unit for use as an elevator trailing cable core, comprising:
the conductors are formed by twisting a plurality of annealed soft copper conductor monofilaments;
an insulating layer as an insulating layer of the conductor;
a ceramic insulating skeleton as a refractory carrier for the insulating layer;
the conductors uniformly penetrate through the insulating layer to form an insulating conductor;
the insulated conductors uniformly penetrate through the ceramic insulating framework to form the cable core unit;
the free bending diameter of the cable core unit is preferably 350-600 mm.
As an alternative embodiment of the present application, optionally, the free bending diameter range of the cable core unit has an upper limit of 850mm.
As an alternative embodiment of the present application, the insulation layer is optionally a low drop thermosetting halogen-free polyolefin insulation material.
As an optional embodiment of the present application, optionally, the number of holes of the ceramic insulating skeleton corresponds to the number of cable cores, and is matched on the outer side surface of each insulating conductor in sequence in a unit section structure.
As an alternative embodiment of the present application, optionally, the first end and the second end of the ceramic insulating skeleton of each unit section are formed with an arc surface structure, and the radius r of the arc surface structure is 3.3-4.6 mm.
As an alternative embodiment of the present application, optionally, the height h of the ceramic insulating skeleton is 5.2 to 7.9mm.
A second aspect of the present application provides a fire-resistant trailing cable for a fire elevator, comprising:
a number of the cable core units of the first aspect;
the range of Shore hardness value of the plastic elastomer flame-retardant sheath is 65-77;
the cable core unit is coated in the plastic elastomer flame-retardant sheath to form the fire-resistant travelling cable for the firefighting elevator; the free bending diameter of the fire-resistant travelling cable for the fire-fighting elevator is preferably 450-650 mm, and the upper limit is 1200mm.
As an alternative embodiment of the present application, optionally, a reserved groove is left between two adjacent ceramic insulating frameworks, and the plastic elastomer flame-retardant sheath is formed with reinforcing ribs in the reserved groove, and the reinforcing ribs are uniformly and discontinuously arranged in the whole length of the cable.
A third aspect of the present application provides a manufacturing method for preparing the fire-resistant trailing cable for firefighting elevator according to the second aspect, including the steps of:
adopting annealed soft copper conductor monofilaments to be twisted into a plurality of core conductors serving as cable cores;
extruding and wrapping an insulating layer outside the cable core as the insulating layer of the cable core to obtain an insulating wire core;
carrying out electron irradiation crosslinking on the insulated wire core, wherein the irradiation dose is controlled to be 11+/-0.5 MGy;
adopting electrical ceramics, and customizing a plurality of ceramic insulating frameworks according to the specification of cable cores and the requirement of the free bending diameter of the cable, wherein the ceramic insulating frameworks are provided with mounting holes penetrating through the insulating cores, the number of the holes corresponds to the number of the cable cores, the head and the tail ends are formed with arc surface structures, and the outer side surfaces are formed with reserved grooves;
penetrating the insulated wire core into the ceramic insulated framework in a unit section structure in a traction mode to obtain a ceramic fireproof insulated cable core assembly;
continuously extruding a layer of plastic elastomer flame-retardant sheath outside the ceramic insulating cable core component; wherein, the fire-retardant sheath of plastics elastomer is connected through the strengthening rib between every adjacent ceramic insulation skeleton.
As an alternative embodiment of the present application, optionally, the insulating layer is made of a low-drop thermosetting halogen-free polyolefin insulating material, which comprises the following components in weight:
30 to 50 parts of linear ethylene-octene copolymer;
10-20 parts of ethylene-butyl acrylate copolymer;
20-30 parts of polypropylene copolymer;
20-30 parts of polyoxymethylene resin;
10-20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer;
80-100 parts of aluminum hydroxide;
20-40 parts of magnesium hydroxide;
10-20 parts of kaolin;
1-2 parts of methacryloxypropyl trimethoxysilane;
4-7 parts of silicone master batch;
2-3 parts of 2, 2-dihydroxymethyl-1, 3-propanediol (pentaerythritol);
3-6 parts of 4,4' -thiobis (6-tert-butyl-3-methylphenol) (antioxidant 300);
1.5 to 3 parts of trimethylolpropane trimethacrylate.
Compared with the prior art, the application can bring the following technical effects:
1. adopt fire-resistant formula retinue cable for fire elevator that this application provided can guarantee the normal operating of fire elevator under the conflagration condition, especially fire elevator well is overheated or under the direct face conflagration influence condition, still can guarantee fire elevator power supply and control signal normal transmission, guarantees the reliable operation of fire elevator, improves fire safety, reduces people's life loss and property loss.
2. The fire-resistant trailing cable can still maintain the integrity of a line within a certain time (more than 180 min) of fire occurrence, can normally transmit elevator control signals, ensures that a fire-fighting elevator can normally operate, and can still ensure normal transmission of power supply and control signals when a part of a fire-fighting elevator well is burnt by flame or overheated by high temperature. The defect that the conventional travelling cable for the firefighting elevator does not have fire resistance or has fire resistance but has short service life is overcome, the fire resistance of the travelling cable for the firefighting elevator car can be greatly improved, the enough service life is ensured, and the fire operation reliability of the firefighting elevator is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:
FIG. 1 is a schematic elevational view of the cable core unit of the invention;
FIG. 2 is a schematic top view of the cable core unit of the present invention;
fig. 3 is a schematic cross-sectional structure of the fire-resistant trailing cable for firefighting elevator of the present invention.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
In this embodiment, the design of the general-purpose conductor material of the cable and the number of cable cores is not limited. The embodiment is not limited as to, for example, plastic extrusion coating process, equipment, etc.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
The cable core unit of the present embodiment refers to a cable core composed of a plurality of ceramic insulating frameworks and a plurality of core insulating cores when no sheath is applied, as shown in fig. 1 and 2.
As shown in fig. 1, 2 and 3, a first aspect of the present application provides a cable core unit for use as an elevator trailing cable, comprising:
the conductor 1 is formed by twisting a plurality of annealed soft copper conductor monofilaments; the conductor 1 is a conductive wire core of the cable, adopts a soft multi-core stranded copper conductor 1, is formed by stranding multi-core annealed soft copper single wires, the corresponding relation between the number of the single wires and the number of the conductors is shown in the table 1, and the common specification is 1.5mm 2 Or 2.5mm 2 Other specifications are also within the protective range;
TABLE 1 correspondence between conductor specifications, ceramic insulation backbone and minimum free bend diameter of cable
An insulating layer 2 as an insulating layer of the conductor 1; the insulating layer 2 is insulated by special low-drop thermosetting halogen-free polyolefin, and the specific components are detailed in the following examples;
a ceramic insulating skeleton 3 serving as a carrier of the insulating layer 2; the ceramic insulating framework 3 is provided with a plurality of sections in one cable, the number of the sections depends on the length required by the cable, each section is contacted with each other through an arc surface 4, the free bending diameter D of the trailing cable is controlled through the radian r of the arc surface, the length l and the height h of each section, and the corresponding relation of the sections is shown in table 2 by combining the hardness characteristics of the material of the cable sheath 6; the minimum height h of each section corresponds to the section specification of the cable conductor, and the corresponding relation is shown in table 1.
TABLE 2 correspondence of cable free bend diameter to ceramic insulation backbone and elastomer jacket
A plurality of conductors 1 are uniformly arranged in the insulating layer 2 in a penetrating way to form an insulating conductor;
the insulated conductors uniformly penetrate through the ceramic insulating framework 3 to form the cable core unit;
the free bending diameter of the cable core unit is 350-600 mm.
The above range is preferred for the free bending diameter of the cable core unit in the present application, but the maximum achievable to 850mm can be achieved by the user according to the design structure of the present application.
As shown in fig. 2 and 3, in preparing the fire-resistant trailing cable for firefighting elevator of the second aspect of this embodiment by the above-described cable core unit:
the outer surface of the conductor 1 is extruded with a plastic insulating layer 2, and an insulating wire core formed by a plurality of conductors 1 and the insulating layer 2 is penetrated into a reserved mounting hole of the ceramic insulating framework 3 to form a ceramic insulating cable core assembly.
The ceramic insulating frameworks 3 (the arc transition surfaces formed at the head and the tail ends) are provided with a plurality of sections which are arranged in a unit section structure and are contacted with each other by arc surfaces 4, and square reserved grooves 5 are reserved on the arc surfaces of two of each framework.
Outside the ceramic insulating framework 3, a plastic elastomer flame-retardant sheath 6 is extruded. The inner side surface of the plastic elastomer flame-retardant sheath 6 is provided with a plurality of groups of reinforcing ribs, and when the plastic elastomer flame-retardant sheath 6 is extruded outside the ceramic insulation framework 3 through an extrusion process, the inner side surface of the plastic elastomer flame-retardant sheath 6 is provided with reinforcing ribs matched with the reserved grooves 5, so that the plastic elastomer flame-retardant sheath 6 can be firmly gripped on the outer side surface of the ceramic insulation framework 3.
Wherein, the Shore A hardness of the plastic elastomer flame-retardant sheath 6 is 65-77, and the special hardness can be more than 77, and the maximum hardness can be applied to 95, and the average thickness is 1.5-2.0 mm.
As an alternative embodiment of the present application, the cable core unit may optionally have a free bending diameter in the range of 450-650 mm. In particular, up to 1200mm can be achieved.
As shown in table 2, in this embodiment, different values of free bending diameter D of the cable are achieved by selecting ceramic insulating frameworks 3 and elastomer sheaths of different specifications. The radian and length of each specification ceramic insulating framework 3 and the free bending diameter of the corresponding cable core unit rise in a positive nonlinear proportion.
In this embodiment, the free bending diameter of the cable core unit is preferably controlled to 350-600 mm, and in particular, up to 850mm.
As an alternative embodiment of the present application, the insulating layer 2 is optionally made of a low-drop thermosetting halogen-free polyolefin insulating material, and has the characteristics of high temperature resistance, low drop and wear resistance. The application weight components are as follows:
30-50 parts of linear ethylene-octene copolymer (POE), 10-20 parts of ethylene-butyl acrylate copolymer (EBA), 20-30 parts of polypropylene copolymer (PP), 20-30 parts of polyoxymethylene resin (POM), 10-20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 80-100 parts of aluminum hydroxide, 20-40 parts of magnesium hydroxide, 10-20 parts of kaolin, 1-2 parts of methacryloxypropyl trimethoxysilane, 4-7 parts of silicone master batch, 2-3 parts of 2, 2-bis-hydroxymethyl-1, 3-propanediol (pentaerythritol), 3-6 parts of 4,4' -thiobis (6-tert-butyl-3-methylphenol) (antioxidant 300) and 1.5-3 parts of trimethylolpropane trimethacrylate (TMPTMA).
In application, a layer of the halogen-free polyolefin insulation is extruded outside the soft copper conductor, and the insulation thickness is 0.8 mm.
As an alternative embodiment of the present application, optionally, the ceramic insulating skeleton 3 is fitted on the outer side surface of each of the insulated conductors in turn in a unit-joint structure.
As shown in fig. 1 and 2, outside the single insulated wire core, a ceramic insulated skeleton 3 disposed in unit sections is provided. The cross section of the ceramic insulating framework 3 is a rectangular framework with an arc surface (the arc transition surface is reserved according to the required radian in preparation), and a plurality of penetrating holes are formed in the end face of the ceramic insulating framework and are used for penetrating insulating wire cores to fix the insulating wire cores. The unit sections are contacted in turn, and two adjacent ceramic insulating frameworks 3 are contacted by an arc surface 4.
When the insulated wire core passes through the ceramic insulation framework 3, a traction mode is adopted for carrying out:
and paying out half of the insulated wire core by using a proper pay-off rack, and placing the insulated wire core on a proper bracket, wherein the length of the bracket exceeds half of the practical application length of the travelling cable. The paying-off end conductors of the insulated wire cores are respectively welded with a single-core non-annealed bare copper wire with the diameter of 1.72-3.50 mm and the length of 10-50 mm, and the insulated wire cores are penetrated into a plurality of ceramic insulated frameworks through the hard copper conductors, wherein the number is the using length m of the cable/the length l of the ceramic insulated frameworks. And sequentially tensioning all the ceramic insulating frameworks, then twisting all the end wire cores, binding the end wire cores with the ceramic insulating frameworks at the end positions, and winding the cable drum.
And (3) fully winding the cable core unit with the ceramic insulating framework on the cable reel, reversely and fully penetrating the ceramic insulating framework into the insulating wire core from the tail end of the insulating wire core pay-off reel by adopting the method to form a complete ceramic insulating cable core assembly, and then tightly wrapping the cable end by adopting the similar method to fully winding the cable reel.
As an alternative embodiment of the present application, optionally, the first end and the second end of the ceramic insulating skeleton 3 of each unit section are formed with an arc surface structure 4, and the radius r of the arc surface structure 4 is 3.3-4.6 mm.
The arc surface structure 4 is directly formed at the head end and the tail end of the ceramic insulation framework 3 in a transition mode. The radius r of the arc surface structure 4 can be seen in table 2.
As an alternative embodiment of the present application, the height h of the ceramic insulating skeleton 3 is optionally 5.2 to 7.9mm. The heights of the ceramic insulating frameworks 3 with different specifications are shown in table 2.
The fire-resistant type travelling cable core for the fire-fighting elevator is prepared by adopting the cable core unit in the first aspect.
A second aspect of the present application provides a fire-resistant trailing cable for a fire elevator, comprising:
the cable core unit of the first aspect;
the plastic elastomer flame-retardant sheath 6, the cable core unit is wrapped in the plastic elastomer flame-retardant sheath 6, as an optional implementation manner of the application, optionally, two ends of every two adjacent ceramic insulating frameworks 3 in the cable core unit are formed with reserved grooves 5, and inner side surfaces of the plastic elastomer flame-retardant sheath 6 are connected in the reserved grooves 5 through reinforcing ribs.
As shown in fig. 2 to 3, in this embodiment, 8 insulating wire cores are used, and 8 circular holes are formed in the length direction of the ceramic insulating skeleton, and a reserved groove 5 shown in fig. 2 is formed. The 8 holes in the ceramic insulating skeleton 3 exhibit a longitudinally symmetrical balanced design.
A reserved groove 5 is reserved between two adjacent ceramic insulating frameworks 3, and is used for forming a discontinuous reinforcing rib in the reserved groove 5 on the inner side of the plastic elastomer flame-retardant sheath 6 when the plastic elastomer flame-retardant sheath 6 is extruded and coated.
When a layer of plastic elastomer flame-retardant sheath 6 is extruded outside the ceramic insulating cable core component by adopting an extrusion process, plastic fluid enters the reserved groove 5 to form reinforcing ribs, so that the grasping performance of the plastic elastomer flame-retardant sheath 6 on the ceramic insulating framework 3 is improved.
The final fire-resistant trailing cable for firefighting elevator was an 8-core cable as shown in fig. 3. The fire-fighting elevator can normally run under the condition of normal non-fire, has fire-resistant characteristics under the condition of fire, and can ensure the power supply and control signal transmission of the elevator car of the fire-fighting elevator under the condition of overheat or direct fire influence, thereby ensuring the reliable running of the fire-fighting elevator, improving the fire-fighting safety and reducing the life and property loss of people.
Although this embodiment describes with each conductor, the insulating sinle silk of above-mentioned quantity, but this scheme can all change according to the difference of ladder kind when in actual use, and also, when super high-rise building was used, the length extension of retinue cable can need increase and hold and draw wire rope, and at this moment, ceramic insulation skeleton can be more than 2 cable core for wear to establish and hold and draw wire rope, the overall dimension of cable also changes, as long as the improvement of what is done on the basis of this application technique, all is the scope of protection of this application.
On the basis of the technical implementation of the application, the length of the cable, the number of the ceramic insulating frameworks, the relevant technical parameters, the size and the like can be set by a user according to the project planning of the fire elevator, and the implementation range of the application can be incorporated as long as the design principle of the application is not deviated from in form.
Example 2
A third aspect of the present application provides a manufacturing method for preparing the fire-resistant trailing cable for firefighting elevator according to the second aspect, including the steps of:
1. by 2.5mm 2 The conductor specification is that 98 annealed soft copper monofilaments are twisted into a soft copper conductor through a beam twisting process, the beam twisting pitch is 16-23 mm, and the outer diameter of the conductor is controlled to be 2.20mm. The cable conductor core number is 8 cores.
2. And extruding and wrapping a layer of special high-temperature-resistant, low-dripping and wear-resistant thermosetting halogen-free polyolefin insulation outside the soft copper conductor, wherein the insulation thickness is 0.8mm, and the surfaces of 8 insulation wires are respectively printed with No. 1-No. 8 by adopting printing ink.
The special halogen-free flame-retardant polyolefin insulating material comprises the following components in parts by weight:
30-50 parts of linear ethylene-octene copolymer (POE), 10-20 parts of ethylene-butyl acrylate copolymer (EBA), 20-30 parts of polypropylene copolymer (PP), 20-30 parts of polyoxymethylene resin (POM), 10-20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 80-100 parts of aluminum hydroxide, 20-40 parts of magnesium hydroxide, 10-20 parts of kaolin, 1-2 parts of methacryloxypropyl trimethoxysilane, 4-7 parts of silicone master batch, 2-3 parts of 2, 2-bis-hydroxymethyl-1, 3-propanediol (pentaerythritol), 3-6 parts of 4,4' -thiobis (6-tert-butyl-3-methylphenol) (antioxidant 300) and 1.5-3 parts of trimethylolpropane trimethacrylate (TMPTMA).
3. And (3) carrying out electron irradiation crosslinking on the extruded insulating wire core, wherein the irradiation dose is controlled to be 11+/-0.5 MGy.
4. Adopt the electrician ceramic, according to the ceramic insulation skeleton of cable length needs customization a plurality of numbers, the appearance of ceramic insulation skeleton references fig. 1 ~ 3, length l=29.4 mm, width w=42.1 mm, terminal surface radian radius r=3.9 mm, height h=6.4 mm, reservation groove width w1=2.0 mm, reservation groove length l1=3.9 mm, hole centre-to-centre spacing: d1 =4.7 mm, d2=5.9 mm.
5. 8 proper pay-off frames are used, the insulating wire cores of the numbers 1-8 are sequentially paid out for half the length and placed on a proper bracket, and the length of the bracket exceeds half the practical application length of the travelling cable. The paying-off end conductors of the insulated wire cores are respectively welded with a non-annealed single-core bare copper wire with the diameter of 2.53mm and the length of 30mm, the insulated wire cores are penetrated into a plurality of ceramic insulated frameworks through hard copper conductors, the using length of the cable is 60m, and the number of the ceramic frameworks is 60/0.0294, which is 2041. And sequentially tensioning all the ceramic insulating frameworks, then twisting all the end wire cores, binding the end wire cores with the ceramic insulating frameworks at the end positions, and winding the cable drum.
6. And (3) winding all the insulated wire cores penetrating through the ceramic insulating frameworks on a cable drum, reversely penetrating all the ceramic insulating frameworks into the insulated wire cores from the tail ends of the insulated wire core pay-off reels by adopting the method to form a complete ceramic insulating cable core assembly, and then binding the cable ends by adopting the similar method to fully winding the cable drum.
7. Outside the ceramic insulating cable core component, a layer of halogen-free low-smoke flame-retardant plastic elastomer sheath 6 is extruded by adopting an extrusion process, the Shore A hardness of the sheath material is 76, and the average thickness is 1.8mm.
8. The free bending diameter value of the fire-resistant travelling cable for the firefighting elevator is 600+/-50 mm.
In the above preparation method, each structure body may be understood by referring to the technical scheme described in embodiment 1, and this embodiment will not be described in detail.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. A cable core unit for use as an elevator trailing cable, comprising:
the conductors are formed by twisting a plurality of annealed soft copper conductor monofilaments;
an insulating layer as an insulating layer of the conductor;
a ceramic insulating skeleton as a refractory carrier for the insulating layer;
the conductors uniformly penetrate through the insulating layer to form an insulating conductor;
the insulated conductors uniformly penetrate through the ceramic insulating framework to form the cable core unit;
the free bending diameter of the cable core unit is preferably 350-600 mm.
2. The cable core unit of claim 1, wherein the cable core unit has an upper free bend diameter of 850mm.
3. The cable core unit of claim 1, wherein the insulation layer is a low drop thermosetting halogen-free polyolefin insulation material.
4. The cable core unit of claim 1, wherein the ceramic insulating skeleton has a number of holes corresponding to the number of cores of the cable, and is fitted to the outer side surface of each of the insulated conductors in turn in a unit-segment structure.
5. The cable core unit of claim 4, wherein the ceramic insulating frameworks of each unit section are formed with arc surface structures at the first and the second ends, and the radius r of the arc surface structures is 3.3-4.6 mm.
6. The cable core unit of claim 4, wherein the ceramic insulating skeleton has a height h of 5.2-7.9 mm.
7. Fire-resistant retinue cable for fire elevator, its characterized in that includes:
a number of cable core units according to any one of claims 1-6;
the range of Shore hardness value of the plastic elastomer flame-retardant sheath is 65-77;
the cable core unit is coated in the plastic elastomer flame-retardant sheath to form the fire-resistant travelling cable for the firefighting elevator; the free bending diameter of the fire-resistant travelling cable for the fire-fighting elevator is preferably 450-650 mm, and the upper limit is 1200mm.
8. The fire resistant trailing cable for firefighting elevator according to claim 7, wherein a reserved groove is left between two adjacent ceramic insulating frameworks, and the plastic elastomer flame retardant sheath is formed with reinforcing ribs in the reserved groove, and the reinforcing ribs are uniformly arranged discontinuously over the whole length of the cable.
9. A method for manufacturing the fire-resistant trailing cable for firefighting elevator according to claim 7 or 8, characterized by comprising the steps of:
twisting annealed soft copper conductor monofilaments into a plurality of conductors serving as cable cores;
extruding a low-drop thermosetting insulating layer outside the cable core to obtain an insulating wire core as the insulating layer of the cable core;
carrying out electron irradiation crosslinking on the insulated wire core, wherein the irradiation dose is controlled to be 11+/-0.5 MGy;
adopting electrical ceramics, and customizing a plurality of ceramic insulating frameworks according to the specification of cable cores and the requirement of the free bending diameter of the cable, wherein the ceramic insulating frameworks are provided with mounting holes penetrating through the insulating cores, the number of the holes corresponds to the number of the cable cores, the head and the tail ends are formed with arc surface structures, and the outer side surfaces are formed with reserved grooves;
penetrating the insulated wire core into the ceramic insulated framework in a unit section structure in a traction mode to obtain a ceramic fireproof insulated cable core assembly;
continuously extruding a layer of plastic elastomer flame-retardant sheath outside the ceramic insulating cable core component; wherein, the fire-retardant sheath of plastics elastomer is connected through the strengthening rib between every adjacent ceramic insulation skeleton.
10. The method of manufacturing of claim 9, wherein the insulating layer is a low drop heat thermosetting halogen-free polyolefin insulating material comprising the following components in weight percent:
30 to 50 parts of linear ethylene-octene copolymer;
10-20 parts of ethylene-butyl acrylate copolymer;
20-30 parts of polypropylene copolymer;
20-30 parts of polyoxymethylene resin;
10-20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer;
80-100 parts of aluminum hydroxide;
20-40 parts of magnesium hydroxide;
10-20 parts of kaolin;
1-2 parts of methacryloxypropyl trimethoxysilane;
4-7 parts of silicone master batch;
2-3 parts of 2, 2-dihydroxymethyl-1, 3-propanediol (pentaerythritol);
3-6 parts of 4,4' -thiobis (6-tert-butyl-3-methylphenol) (antioxidant 300);
1.5 to 3 parts of trimethylolpropane trimethacrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211676078.6A CN116013592A (en) | 2022-12-26 | 2022-12-26 | Cable core unit, fire-resistant trailing cable for firefighting elevator and manufacturing method of fire-resistant trailing cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211676078.6A CN116013592A (en) | 2022-12-26 | 2022-12-26 | Cable core unit, fire-resistant trailing cable for firefighting elevator and manufacturing method of fire-resistant trailing cable |
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| CN116013592A true CN116013592A (en) | 2023-04-25 |
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| CN202211676078.6A Pending CN116013592A (en) | 2022-12-26 | 2022-12-26 | Cable core unit, fire-resistant trailing cable for firefighting elevator and manufacturing method of fire-resistant trailing cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908603A (en) * | 2023-09-14 | 2023-10-20 | 深圳市艾联特电子科技有限公司 | Reliability detection method and system based on connector |
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2022
- 2022-12-26 CN CN202211676078.6A patent/CN116013592A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908603A (en) * | 2023-09-14 | 2023-10-20 | 深圳市艾联特电子科技有限公司 | Reliability detection method and system based on connector |
| CN116908603B (en) * | 2023-09-14 | 2023-11-14 | 深圳市艾联特电子科技有限公司 | Reliability detection method and system based on connector |
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