CN117238564B - Cable for railway vehicle - Google Patents
Cable for railway vehicle Download PDFInfo
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- CN117238564B CN117238564B CN202311215802.XA CN202311215802A CN117238564B CN 117238564 B CN117238564 B CN 117238564B CN 202311215802 A CN202311215802 A CN 202311215802A CN 117238564 B CN117238564 B CN 117238564B
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- buffer
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- 239000010410 layer Substances 0.000 claims abstract description 230
- 239000003292 glue Substances 0.000 claims abstract description 84
- 239000012790 adhesive layer Substances 0.000 claims abstract description 57
- 238000002156 mixing Methods 0.000 claims abstract description 39
- 239000003981 vehicle Substances 0.000 claims abstract description 33
- 239000004020 conductor Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001704 evaporation Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 108010010803 Gelatin Proteins 0.000 claims abstract description 15
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 15
- 229920000159 gelatin Polymers 0.000 claims abstract description 15
- 239000008273 gelatin Substances 0.000 claims abstract description 15
- 235000019322 gelatine Nutrition 0.000 claims abstract description 15
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 15
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002383 tung oil Substances 0.000 claims abstract description 15
- 230000008020 evaporation Effects 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 30
- 229920003023 plastic Polymers 0.000 claims description 30
- 239000004033 plastic Substances 0.000 claims description 30
- 239000000835 fiber Substances 0.000 claims description 16
- 229920002577 polybenzoxazole Polymers 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000011231 conductive filler Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 16
- 239000004800 polyvinyl chloride Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 14
- 238000001125 extrusion Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
The invention provides a cable for a railway vehicle, which comprises a conductor, an insulating layer, a buffer adhesive layer and a sheath layer which are coaxially arranged in sequence from inside to outside, wherein the buffer adhesive layer comprises the following raw materials in parts by weight: 5 parts of rosin, 4 parts of tung oil, 2 parts of gelatin and 38 parts of water, and the preparation method of the buffer glue layer comprises the following steps: mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer. The cable for the railway vehicle has good vibration resistance, can effectively maintain the structural strength of the sheath layer 4 in a vibration environment, and ensures that the service life of the cable in the vibration environment is longer.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a cable for a railway vehicle.
Background
In order to meet the power demand of high-speed running, a rail transit vehicle is generally required to be provided with a stable power supply system in a matched manner, and in the rail transit vehicle, cables are widely applied to various parts of the rail transit vehicle, and the stability of the cables becomes a necessary condition for the stable running of the rail transit vehicle.
In the prior art, a direct current cable for a medium-low voltage railway vehicle generally comprises a conductor, an insulating layer, a shielding layer and a sheath layer which are arranged from inside to outside, and armor layers are arranged outside part of the special-purpose cable. Although the cable can meet the requirement of power transmission, the reliability problem still exists in practical use, and due to the special working environment of the railway vehicle, the vehicle is inevitably in a vibration environment for a long time, so that the cable for the railway vehicle needs to face a long-term vibration effect, is limited by the layered structure of the cable, and the vibration is easy to cause abrasion and accelerated aging among layers in the cable, so that the service stability of the cable is greatly limited.
In view of this, how to improve the structural stability of the cable for railway vehicles is one of the technical problems to be solved at present.
Disclosure of Invention
In view of the above, the invention provides a cable for a railway vehicle, which aims to provide a cable with more reasonable structural design, thereby improving the adaptability of the cable to the vibration environment to a certain extent.
The technical scheme of the invention is realized as follows: the invention provides a cable for a railway vehicle, which comprises a conductor, an insulating layer, a buffer adhesive layer and a sheath layer which are coaxially arranged in sequence from inside to outside, wherein the buffer adhesive layer comprises the following raw materials in parts by weight: 5 parts of rosin, 4 parts of tung oil, 2 parts of gelatin and 38 parts of water, and the preparation method of the buffer glue layer comprises the following steps: mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer.
In some embodiments, the insulation layer is arranged on the first wrapping layer, and the insulation layer is arranged on the second wrapping layer.
In some embodiments, the method further comprises a second wrapping layer, wherein the second wrapping layer is arranged between the first wrapping layer and the sheath layer, and two side surfaces of the second wrapping layer are covered with buffer glue layers.
In some embodiments, the first wrapping layer and the second wrapping layer are formed by wrapping an aluminum-plastic composite belt, and a first protrusion is arranged on one surface of the aluminum-plastic composite belt of the first wrapping layer, which is close to the second wrapping layer, and extends along the wrapping direction of the first wrapping layer.
In some embodiments, the aluminum-plastic composite strip of the second wrapping layer is provided with a second protrusion near one surface of the first wrapping layer, and the second protrusion extends along the wrapping direction of the second wrapping layer.
In some embodiments, the wrapping direction of the first wrap layer is opposite to the wrapping direction of the second wrap layer.
In some embodiments, the raw materials of the buffer adhesive layer further comprise 2 parts of heat conducting filler, and the preparation method of the buffer adhesive layer comprises the steps of adding 2 parts of heat conducting filler when mixing the first glue solution and the second glue solution, and mixing to obtain the buffer adhesive layer.
In some embodiments, the thermally conductive filler is a mixture of aluminum powder and polybenzobisoxazole fibers, wherein the mass ratio of aluminum powder to polybenzobisoxazole fibers is 1:1, the average particle size of the aluminum powder is 40-50 μm, and the average length of the polybenzobisoxazole fibers is 1-2mm.
In some embodiments, the heat conducting layer is filled between the conductor and the insulating layer, and the heat conducting layer is made of heat conducting mud.
In some embodiments, a third wrap layer is further included, the third wrap layer being disposed between the thermally conductive layer and the insulating layer, the third wrap layer being wrapped with copper foil.
Compared with the prior art, the cable for the railway vehicle has the following beneficial effects:
According to the cable for the railway vehicle, the buffer adhesive layer structure is improved, so that the vibration resistance of the cable is greatly improved, the structural stability of the sheath layer of the cable is greatly improved under a vibration environment, and the sheath layer is more stable and reliable through the isolation effect and the vibration absorption effect of the buffer adhesive layer.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a cable for a railway vehicle of the present invention;
FIG. 2 is an exploded view of the cable for a railway vehicle of the present invention;
FIG. 3 is an isometric view of a first wrap in the cable for a railway vehicle of the present invention;
Fig. 4 is an isometric view of a second wrap in the cable for a railway vehicle of the present invention.
In the figure: 1-conductor, 2-insulating layer, 3-buffer glue layer, 4-sheath layer, 5-first cladding layer, 6-second cladding layer, 7-heat conduction layer, 8-third cladding layer, 51-first protrusion, 61-second protrusion.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the invention belong. If the definitions set forth in this section are contrary to or otherwise inconsistent with the definitions set forth in the patents, patent applications, published patent applications and other publications incorporated herein by reference, the definitions set forth in this section are preferentially set forth in the definitions set forth herein.
As shown in fig.1, referring to fig. 2 to 4, the cable for a railway vehicle of the present invention includes a conductor 1, an insulating layer 2, a buffer adhesive layer 3 and a sheath layer 4 coaxially disposed in sequence from inside to outside, wherein the buffer adhesive layer 3 includes the following raw materials in parts by weight: 5 parts of rosin, 4 parts of tung oil, 2 parts of gelatin and 38 parts of water, and the preparation method of the buffer glue layer 3 comprises the following steps: mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer 3.
In the above embodiment, the buffer adhesive layer 3 is a viscous colloid at normal temperature, the buffer adhesive layer 3 is adopted to be filled between the sheath layer 4 and the insulating layer 2, so that a certain vibration-resistant effect can be achieved, and in particular, the insulating layer 2 and the sheath layer 4 cannot be in direct contact under the vibration effect, because the surface tension of the buffer adhesive layer 3 acts on the adhesiveness of the buffer adhesive layer and the buffer adhesive layer, the vibration effect can be directly absorbed by the buffer adhesive layer 3 after passing through the sheath layer 4, the collision and friction between the sheath layer 4 and the insulating layer 2 cannot occur basically, and because of the vibration-absorbing effect of the buffer adhesive layer 3, the insulating layer 2 can be prevented from being affected by the vibration to a great extent.
In the above embodiment, the buffer adhesive layer may be other colloid or glue solution that is stable and viscous at normal temperature.
In some embodiments, the insulation layer further comprises a first wrapping layer 5, the first wrapping layer 5 is arranged between the insulation layer 2 and the sheath layer 4 in a wrapping mode, and two side surfaces of the first wrapping layer 5 are covered with the buffer glue layers 3.
In the above embodiment, the buffer adhesive layer 3 is a viscous material, and the insulating layer 2 and the sheath layer 4 are extruded and processed on the surface of the cable, so as to avoid the influence of the viscous buffer adhesive layer 3 on the quality of the extruded sheath layer 4 on the surface of the insulating layer 2, therefore, the buffer adhesive layer 3 is attached to the surface of the wrapping material of the first wrapping layer 5 in advance as an attachment, the buffer adhesive layer 3 is processed to the outer surface of the insulating layer 2 in a wrapping manner, and then the sheath layer 4 is wrapped on the buffer adhesive layer 3 and the corresponding outer side of the first wrapping layer 5 in an extrusion wrapping manner.
In the above embodiment, the first wrapping layer 5 may completely wrap the outer side of the insulating layer 2, or may also perform incomplete wrapping, where the first wrapping layer 5 is mainly used to improve the uniformity of the overall distribution of the viscous buffer glue layer 3, and avoid the uneven distribution of the buffer glue layer 3 caused by the extrusion process during the extrusion of the sheath layer 4.
In some embodiments, the second wrapping layer 6 is further included, the second wrapping layer 6 is arranged between the first wrapping layer 5 and the sheath layer 4 in a wrapping mode, and two side surfaces of the second wrapping layer 6 are covered with the buffer glue layer 3.
In the above embodiment, as a preferred embodiment, during the extrusion process of the sheath layer 4, the material of the sheath layer 4 may extrude the buffer glue layer 3 located on the outer surface of the first sheath layer 5 in the extrusion die head, so as to reduce the residual buffer glue layer on the outer surface of the first sheath layer 5, which may cause the external vibration effect to be transmitted to the surface of the first sheath layer 5 again through the sheath layer 4, and the friction between the two layers may also affect the structural stability of the sheath layer 4. The second wrapping layer 6 is matched with the first wrapping layer 5, a storage space of the buffer adhesive layer 6 can be formed between the first wrapping layer 5 and the second wrapping layer 6, and if the buffer adhesive layer 3 in the storage space is pressed in the extrusion process of the sheath layer 4, the buffer adhesive layer 3 in the storage space can be extruded to compensate the buffer adhesive layer 3 lost outside the second wrapping layer 6, so that the stability of the buffer adhesive layer 3 in the inner side of the sheath layer 4 in the extrusion process of the sheath layer 4 is improved.
In some embodiments, the first wrapping layer 5 and the second wrapping layer 6 are formed by wrapping an aluminum-plastic composite belt, and a first protrusion 51 is arranged on one surface of the aluminum-plastic composite belt of the first wrapping layer 5, which is close to the second wrapping layer 6, and the first protrusion 51 extends along the wrapping direction of the first wrapping layer 5.
In the above embodiment, the first protrusion 51 can block the buffer adhesive layer 3 along the reverse direction of the axis of the cable, so as to avoid uneven distribution and detachment of the buffer adhesive layer 3 caused by dragging the buffer adhesive layer 3 to other positions in the extrusion process of the sheath layer 4, and meanwhile, the first protrusion 51 can play a supporting role, so that a supporting role is provided for the space between the first wrapping layer 5 and the second wrapping layer 6, and the second wrapping layer 6 is prevented from being directly attached to the first wrapping layer 5, so that the buffer adhesive layer 3 is unevenly distributed and loses the anti-vibration effect.
In the above embodiment, the aluminum-plastic composite belt is used as the material of the wrapping layer, so that the heat conduction performance of the wrapping layer can be improved.
In some embodiments, the aluminum-plastic composite strip of the second wrapping layer 6 is provided with a second protrusion 61 on a surface close to the first wrapping layer 5, and the second protrusion 61 extends along the wrapping direction of the second wrapping layer 6.
In the above embodiment, the second winding protrusion 61 functions the same as the first winding protrusion 51.
In some embodiments, the wrapping direction of the first wrapping layer 5 is opposite to the wrapping direction of the second wrapping layer 6.
In the above embodiment, the first wrapping layer 5 and the second wrapping layer 6 of the reverse wrapping can effectively avoid the mutual interference between the first wrapping layer 5 and the second wrapping layer 6, and secondly, after the reverse wrapping, the contact point between the first protrusion 51 and the second protrusion 61 is greatly reduced, the space stability between the first wrapping layer 5 and the second wrapping layer 6 is higher and stronger, which is beneficial to maintaining the uniform distribution of the intermediate buffer glue layer 3.
In some embodiments, the raw materials of the buffer adhesive layer 3 further include 2 parts of a heat conductive filler, and the preparation method of the buffer adhesive layer 3 includes adding 2 parts of the heat conductive filler when mixing the first glue solution and the second glue solution, and mixing to obtain the buffer adhesive layer 3.
In the above embodiment, due to the deviation of the heat conducting effect of the buffer glue layer 3, in order to reduce the temperature accumulation in the cable as much as possible, the heat dissipation effect of the cable can be within the range of reasonable expected effect, and the material with part capable of increasing the heat conducting effect, such as metal powder or heat conducting fiber, can be added into the raw material of the buffer glue layer. The heat conductivity of the buffer adhesive layer 3 is increased by adding the heat conducting filler, so that the heat dissipation of the cable is in a reasonable expected range.
In some embodiments, the thermally conductive filler is a mixture of aluminum powder and polybenzobisoxazole fibers, wherein the mass ratio of aluminum powder to polybenzobisoxazole fibers is 1:1, the average particle size of the aluminum powder is 40-50 μm, and the average length of the polybenzobisoxazole fibers is 1-2mm.
In the embodiment, aluminum powder and polybenzoxazole fibers are adopted as the heat conducting filler, and the particle filler and the fiber filler are matched, so that the heat conducting effect is better, and meanwhile, the polybenzoxazole fibers are distributed in the buffer adhesive layer 3 to have smaller abrasion effect on the insulating layer 2 and the sheath layer 4.
In some embodiments, the heat conducting layer 7 is further included, the heat conducting layer 7 is filled between the conductor 1 and the insulating layer 2, and the heat conducting layer 7 is made of heat conducting mud.
In the above embodiment, the heat conducting layer made of the heat conducting mud is disposed between the conductor 1 and the insulating layer 2, so that on one hand, the contact area and the heat conducting efficiency between the conductor 1 and the insulating layer 2 are improved, and on the other hand, the heat conducting layer 7 is used as a buffer structure, so that the vibration resistance between the insulating layer 2 and the conductor 1 can be further improved, and the damage to the conductor 1 caused by vibration is avoided.
In some embodiments, a third wrapping layer 8 is further included, the third wrapping layer 8 being disposed between the heat conducting layer 7 and the insulating layer 2, the third wrapping layer 8 being formed by wrapping copper foil.
In the above embodiment, since the insulating layer 2 is wrapped on the outer side of the conductor 1 in an extrusion manner, in order to avoid the impact of the extrusion process on the uniform distribution of the heat conducting layer 7, after the heat conducting layer 7 is coated on the outer side of the conductor 1, the heat conducting layer 7 is wrapped by the third wrapping layer 8, so as to improve the structural stability of the heat conducting layer 7, and the third wrapping layer 8 obtained by wrapping the copper foil has certain anti-interference capability and good heat conducting performance.
Example 1
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer.
And extruding and wrapping crosslinked polyvinyl chloride outside the conductor 1 with the diameter of 9mm to obtain an insulating layer 2 with the thickness of 2mm, wrapping an aluminum-plastic composite belt with a buffer glue layer with the surface of 1mm attached to the surface of the insulating layer 2, and extruding and wrapping crosslinked polyvinyl chloride with the thickness of 2mm outside to obtain the cable.
Example 2
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer.
And extruding and wrapping crosslinked polyvinyl chloride on the outer side of a conductor 1 with the diameter of 9mm to obtain an insulating layer 2 with the thickness of 2mm, wrapping an aluminum-plastic composite belt with a buffer glue layer with the surface of 1mm attached to the surface of the insulating layer 2, then extruding and wrapping the crosslinked polyvinyl chloride with the thickness of 2mm on the outer side of the insulating layer, and obtaining the cable.
Example 3
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer.
And extruding and wrapping crosslinked polyvinyl chloride on the outer side of a conductor 1 with the diameter of 9mm to obtain an insulating layer 2 with the thickness of 2mm, wrapping an aluminum-plastic composite belt with a buffer glue layer with the surface of 1mm attached to the surface of the insulating layer 2, attaching an aluminum-plastic composite belt with the buffer glue layer with the surface of 1mm attached to the surface of the wrapping in the opposite direction, and extruding and wrapping crosslinked polyvinyl chloride with the thickness of 2mm on the outer side to obtain the cable.
Example 4
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer.
Extruding and wrapping crosslinked polyvinyl chloride on the outer side of a conductor 1 with the diameter of 9mm to obtain an insulating layer 2 with the thickness of 2mm, and wrapping an aluminum-plastic composite belt with a buffer glue layer with the surface of 1mm on the surface of the insulating layer 2, wherein a convex edge is arranged on one side, close to a sheath layer 4, of the aluminum-plastic composite belt along the length direction; then an aluminum-plastic composite belt with a 1mm buffer adhesive layer is attached to the surface of the reverse wrapping, and a convex edge is arranged on one side, close to the insulating layer 2, of the aluminum-plastic composite belt along the length direction; and then extruding and wrapping crosslinked polyvinyl chloride with the thickness of 2mm on the outer side to obtain the cable.
Example 5
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; mixing the first glue solution, the second glue solution, 1 part of aluminum powder with the average particle diameter of 40-50 mu m and 1 part of polybenzobisoxazole fiber with the average length of 1-2mm to obtain the buffer glue layer.
Extruding and wrapping crosslinked polyvinyl chloride on the outer side of a conductor 1 with the diameter of 9mm to obtain an insulating layer 2 with the thickness of 2mm, and wrapping an aluminum-plastic composite belt with a buffer glue layer with the surface of 1mm on the surface of the insulating layer 2, wherein a convex edge is arranged on one side, close to a sheath layer 4, of the aluminum-plastic composite belt along the length direction; then an aluminum-plastic composite belt with a 1mm buffer adhesive layer is attached to the surface of the reverse wrapping, and a convex edge is arranged on one side, close to the insulating layer 2, of the aluminum-plastic composite belt along the length direction; and then extruding and wrapping crosslinked polyvinyl chloride with the thickness of 2mm on the outer side to obtain the cable.
Example 6
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; mixing the first glue solution, the second glue solution, 1 part of aluminum powder with the average particle diameter of 40-50 mu m and 1 part of polybenzobisoxazole fiber with the average length of 1-2mm to obtain the buffer glue layer.
Coating a layer of heat conduction mud with the average thickness of 1mm along the radial direction on the outer side of a conductor 1 with the diameter of 9mm, extruding and coating crosslinked polyvinyl chloride to obtain an insulating layer 2 with the thickness of 2mm, wrapping an aluminum-plastic composite belt with a buffer adhesive layer with the surface of 1mm attached to the surface of the insulating layer 2, and arranging a convex edge on one side, close to a sheath layer 4, of the aluminum-plastic composite belt along the length direction; then an aluminum-plastic composite belt with a 1mm buffer adhesive layer is attached to the surface of the reverse wrapping, and a convex edge is arranged on one side, close to the insulating layer 2, of the aluminum-plastic composite belt along the length direction; and then extruding and wrapping crosslinked polyvinyl chloride with the thickness of 2mm on the outer side to obtain the cable.
Example 7
Preparing a buffer adhesive layer:
Mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; mixing the first glue solution, the second glue solution, 1 part of aluminum powder with the average particle diameter of 40-50 mu m and 1 part of polybenzobisoxazole fiber with the average length of 1-2mm to obtain the buffer glue layer.
Wrapping copper foil with the thickness of 0.2mm on the outer side of a conductor 1 with the diameter of 9mm, coating heat conduction mud with the thickness of 1mm on one side of the copper foil close to the conductor 1, extruding and wrapping crosslinked polyvinyl chloride on the outer side of the conductor 1 wrapped with the copper foil to obtain an insulating layer 2 with the thickness of 2mm, wrapping an aluminum-plastic composite belt with a buffer glue layer with the surface of 1mm attached to the surface of the insulating layer 2, and arranging a convex edge on one side of the aluminum-plastic composite belt close to a sheath layer 4 along the length direction; then an aluminum-plastic composite belt with a 1mm buffer adhesive layer is attached to the surface of the reverse wrapping, and a convex edge is arranged on one side, close to the insulating layer 2, of the aluminum-plastic composite belt along the length direction; and then extruding and wrapping crosslinked polyvinyl chloride with the thickness of 2mm on the outer side to obtain the cable.
Comparative example
The outer side of the conductor 1 with the diameter of 9mm is extruded with crosslinked polyvinyl chloride to obtain the insulating layer 2 with the thickness of 2mm, and then the outer side is extruded with crosslinked polyvinyl chloride with the thickness of 2mm to obtain the cable.
Vibration failure experiment: the cables prepared in examples 1 to 7 and comparative example were placed on a vibrating table, and subjected to reciprocating vibration treatment in the vertical direction at a vibration frequency of 300hz and a vibration amplitude of 2mm, and after 12 hours of vibration treatment, the sheath layer was subjected to ring-cutting separation, and the ring-cut separated sheath layer 4 was stretched in the axial direction, and the tensile strength at break was measured to obtain the data shown in the following table:
Meanwhile, the cables of the above examples and comparative examples were subjected to heat dissipation test at 1kV voltage, and after 6 hours of energization, the surface temperature of the conductor 1 was detected, to obtain data shown in the following table:
According to the data, compared with a conventional cable structure, the cable for the railway vehicle has good vibration resistance, and meanwhile, the problem of poor heat dissipation caused by the introduction of the buffer adhesive layer is reduced through the formula improvement of the buffer adhesive layer and the structural improvement of the heat conducting layer.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The cable for the railway vehicle is characterized by comprising a conductor, an insulating layer, a buffer adhesive layer and a sheath layer which are coaxially arranged from inside to outside in sequence, wherein the buffer adhesive layer comprises the following raw materials in parts by weight: 5 parts of rosin, 4 parts of tung oil, 2 parts of gelatin and 38 parts of water, and the preparation method of the buffer glue layer comprises the following steps: mixing 5 parts of rosin with 20 parts of water, heating to 80 ℃, and adding 4 parts of tung oil and uniformly stirring when the heat preservation evaporation is carried out until no obvious steam exists, so as to obtain a first glue solution; mixing gelatin with 18 parts of water, heating to 80 ℃, and preserving heat and evaporating until no obvious steam exists to obtain a second glue solution; and mixing the first glue solution and the second glue solution to obtain the buffer glue layer.
2. The cable for a railway vehicle as claimed in claim 1, further comprising a first wrapping layer provided between the insulating layer and the sheath layer, both side surfaces of the first wrapping layer being covered with the buffer glue layer.
3. The cable for a railway vehicle as claimed in claim 2, further comprising a second wrapping layer provided between the first wrapping layer and the sheath layer, both side surfaces of the second wrapping layer being covered with the buffer glue layer.
4. A cable for a railway vehicle as claimed in claim 3, wherein the first wrapping layer and the second wrapping layer are formed by wrapping an aluminum-plastic composite tape, and a first protrusion is arranged on one surface of the aluminum-plastic composite tape of the first wrapping layer, which is close to the second wrapping layer, and extends along the wrapping direction of the first wrapping layer.
5. The cable for railway vehicle as claimed in claim 4, wherein the aluminum-plastic composite tape of the second wrapping layer is provided with a second protrusion on a side thereof adjacent to the first wrapping layer, the second protrusion extending in a wrapping direction of the second wrapping layer.
6. The cable for a railway vehicle as claimed in claim 5, wherein the wrapping direction of the first wrapping layer is opposite to the wrapping direction of the second wrapping layer.
7. The cable for railway vehicles according to claim 1, wherein the raw materials of the buffer adhesive layer further comprise 2 parts of heat conducting filler, and the preparation method of the buffer adhesive layer comprises the steps of adding 2 parts of heat conducting filler when mixing the first adhesive solution and the second adhesive solution, and obtaining the buffer adhesive layer after mixing.
8. The cable for railway vehicles according to claim 7, wherein the heat conductive filler is a mixture of aluminum powder and polybenzobisoxazole fibers, wherein the mass ratio of aluminum powder to polybenzobisoxazole fibers is 1:1, the average particle diameter of aluminum powder is 40 to 50 μm, and the average length of polybenzobisoxazole fibers is 1 to 2mm.
9. The cable for a railway vehicle as claimed in claim 1, further comprising a heat conductive layer filled between the conductor and the insulating layer, the heat conductive layer being of a heat conductive paste material.
10. The cable for a railway vehicle as claimed in claim 9, further comprising a third wrapping layer disposed between the heat conductive layer and the insulating layer, the third wrapping layer being formed by wrapping a copper foil.
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