CN210296003U - Novel rubber sheath direct current traction cable for rail transit - Google Patents
Novel rubber sheath direct current traction cable for rail transit Download PDFInfo
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- CN210296003U CN210296003U CN201921565842.6U CN201921565842U CN210296003U CN 210296003 U CN210296003 U CN 210296003U CN 201921565842 U CN201921565842 U CN 201921565842U CN 210296003 U CN210296003 U CN 210296003U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model provides a novel rubber sheath direct current traction cable for track traffic, including tin-plated copper conductor, rubber insulation layer, water blocking layer, first fire-retardant layer, fire-retardant oxygen layer, the fire-retardant layer of second and the cable rubber sheath layer that sets gradually from inside to outside. The cable provided by the utility model has a good flame retardant structure, adopts the tin-plated copper conductor inner core to extrude and wrap the insulating layer, the oxygen isolation layer and the low-smoke halogen-free flame retardant rubber sheath, and the low-smoke halogen-free flame retardant belt is wrapped around the insulating layer, the oxygen isolation layer and the sheath layer; the high flame-retardant rubber oxygen-insulating material adopted by the oxygen-insulating layer takes most heat and crusts when burning, thereby playing the dual effects of cooling and insulating oxygen; meanwhile, the two flame-retardant layers are designed, so that the overall flame-retardant performance of the cable is improved; and moreover, a water-resistant layer and a cable rubber sheath layer are also arranged, the sheath material has good flame retardant property and low temperature resistance, and the flame retardant and waterproof properties of the cable are further ensured on the basis of ensuring the flexibility of the cable.
Description
Technical Field
The utility model relates to the technical field of cables, particularly, relate to a novel rubber sheath direct current traction cable for track traffic.
Background
According to the difference of service ranges, rail transit is generally divided into three major categories of national railway systems, intercity rail transit and urban rail transit. The rail transit has the advantages of large transportation volume, high speed, dense shift, safety, comfort, high punctuality rate, all weather, low transportation cost, energy conservation, environmental protection and the like. The direct current traction cable for the track traffic is used for a traction power supply system of the urban track traffic, is mainly suitable for connecting a feeder line from a traction substation to a contact net with a return line, has multiple special performances of low smoke, zero halogen, flame retardance, water resistance, rat resistance, ant resistance, ultraviolet resistance and the like due to the specific use environment requirement, and meets the special requirements of intensive people flow and important occasions of facilities on cable cleanness, environmental protection, flame retardance and the like.
In the prior art, the cable has some defects in comprehensive performance. The using environment of the power cable for rail transit is mostly underground places with dense population. In case of fire, the underground closed environment brings great difficulty to escape and fire fighting. These factors determine that the cable for rail transit (subway) must have good flame retardant property and low smoke and low toxicity. Due to the effects of environmental and meteorological factors, the cable may be laid in a humid environment for a long time, and water molecules may radially penetrate through the protective layer, invade into the cable, and are adsorbed by insulation, so that the electrical performance is reduced, and therefore, the cable is required to have a radial waterproof function. At present, thermoplastic halogen-free low-smoke flame-retardant cable materials are generally adopted in the market, the defects of the thermoplastic halogen-free low-smoke cable materials are gradually shown along with the time, and the cable materials are particularly difficult to lay in a narrow space due to high hardness, easy to crack at the temperature of-5 ℃ and the like.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a novel rubber sheath direct current traction cable for track traffic, in order to solve the above problems completely or partially, the cable has a good flame retardant structure, adopts the tin-plated copper conductor inner core to extrude and wrap the insulating layer, the oxygen isolation layer and the low smoke and zero halogen flame retardant rubber sheath, and the low smoke and zero halogen flame retardant belt is wrapped around the insulating layer, the oxygen isolation layer and the sheath layer; the high flame-retardant rubber oxygen-insulating material adopted by the oxygen-insulating layer takes most heat and crusts when burning, thereby playing the dual effects of cooling and insulating oxygen; meanwhile, the two flame-retardant layers are designed, so that the overall flame-retardant performance of the cable is improved; and moreover, a water-resistant layer and a cable rubber sheath layer are also arranged, the sheath material has good flame retardant property and low temperature resistance, and the flame retardant and waterproof properties of the cable are further ensured on the basis of ensuring the flexibility of the cable. The cable is mainly suitable for connecting a feeder line from a traction substation to a contact net and a return line, has multiple special performances of low smoke, zero halogen, flame retardance, water resistance, rat resistance, ant resistance, ultraviolet ray resistance and the like due to specific use environment requirements, and meets the special requirements of intensive people flow, important facilities and occasions on cable cleanness, environmental protection, flame retardance and the like.
In order to realize the above purpose of the utility model, the following technical scheme is adopted:
a novel rubber sheath direct current traction cable for rail transit comprises a tinned copper conductor, a rubber insulation layer, a water blocking layer, a first flame-retardant layer, a flame-retardant oxygen isolation layer, a second flame-retardant layer and a cable rubber sheath layer which are sequentially arranged from inside to outside.
Preferably, a reinforced non-woven fabric layer is arranged between the tin-plated copper conductor and the rubber insulating layer.
Preferably, the tin-plated copper conductor is selected from a 5 th tin-plated copper conductor or a 6 th tin-plated copper conductor.
Preferably, the insulating rubber layer is an ethylene propylene diene monomer insulating material layer.
Preferably, the first flame-retardant layer and/or the second flame-retardant layer is a wrapped low-smoke halogen-free flame-retardant belt.
Preferably, the water-blocking layer adopts a high-speed swelling high-molecular water-absorbing resin type water-blocking tape.
Preferably, the oxygen-isolating flame-retardant layer is a high-flame-retardant rubber oxygen-isolating layer.
Preferably, the cable rubber sheath is a low-smoke halogen-free flame-retardant rubber sheath material.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the cable provided by the utility model has a good flame retardant structure, adopts the tin-plated copper conductor inner core to extrude and wrap the insulating layer, the oxygen isolation layer and the low-smoke halogen-free flame retardant rubber sheath, and the low-smoke halogen-free flame retardant belt is wrapped around the insulating layer, the oxygen isolation layer and the sheath layer; the high flame-retardant rubber oxygen-insulating material adopted by the oxygen-insulating layer takes most heat and crusts when burning, thereby playing the dual effects of cooling and insulating oxygen; meanwhile, the two flame-retardant layers are designed, so that the overall flame-retardant performance of the cable is improved; and moreover, a water-resistant layer and a cable rubber sheath layer are also arranged, the sheath material has good flame retardant property and low temperature resistance, and the flame retardant and waterproof properties of the cable are further ensured on the basis of ensuring the flexibility of the cable.
(2) The utility model provides a cable sheath adopts low smoke and zero halogen rubber sheath material, and sheath material adopts cross-linking agent and helps the synergism of both intercombinations of cross-linking agent, makes its cross-linking density high, and the sizing material water absorption rate is low, has good waterproof performance. In addition, a layer of high-speed expanded polymer water-absorbent resin type water-blocking tape is wrapped outside the insulated wire core, so that the waterproof performance of the cable is further guaranteed, and the flexibility of the cable is not influenced.
(3) The utility model provides a cable sheath adopts low smoke and zero halogen rubber sheath material, and the used ethylene octene copolymer of sheath material is the elastomer that has narrow relative molecular mass distribution and even short chain branch and distributes that metallocene is the catalyst, and the molecular chain is saturated relatively, and the sheath material has excellent properties such as low temperature resistant, ozone-resistant, ageing-resistant, ultraviolet resistance. Meanwhile, the cold-resistant plasticizer is added to enable the rubber material to have better low temperature resistance, the rubber material is good in flexibility, the low temperature resistance can reach-40 ℃, the Shore hardness is not more than 70A, and the problem that the traditional thermoplastic halogen-free low-smoke cable material is easy to crack at low temperature is solved. The termite resistance of the finished cable meets the JB/T10696.9 standard requirement, and a colony method is adopted for carrying out cable termite test, so that the corrosion grade reaches 1 level; meanwhile, the ratproof performance meets the JB/T10696.10 standard requirement, and the protection grade is 'remarkable'.
(4) The utility model provides a cable for urban rail transit pulls power supply system, mainly is applicable to and pulls the feeder and the return line of transformer substation to contact net and connect, because its specific service environment requires, the cable has low cigarette, no halogen, fire-retardant, waterproof, protection against rodents, prevents multiple special properties such as ant and ultraviolet protection, and it is intensive to satisfy the stream of people, and the important occasion of facility is clean to the cable, environmental protection, special requirements such as fire-retardant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a cable according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a cable according to another embodiment of the present invention. …
Reference numerals:
1-tin-plated copper conductor; 2-a rubber insulating layer; 3-a water-resistant layer;
4-a first flame retardant layer; 5-flame-retardant oxygen-isolating layer; 6-a second flame retardant layer;
7-cable rubber sheath layer; 8-reinforced non-woven fabric layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a cable, as shown in figure 1, including tin-plated copper conductor 1, rubber insulation layer 2, water blocking layer 3, first fire-retardant layer 4, fire-retardant oxygen layer 5, the fire-retardant layer 6 of second and cable rubber sheath layer 7 that set gradually from inside to outside.
The tinned copper conductor 1 is a copper monofilament with a thin layer of metallic tin plated on the surface of a copper wire, and the tinned copper conductor 1 is formed after wire bundling and stranding. The tinned copper wire is soft in material and good in conductivity, and compared with a bare copper wire, the tinned copper wire is higher in corrosion resistance and oxidation resistance, and the service life of a weak current cable can be greatly prolonged. In the present application, the tin-plated copper conductor 1 is selected from the 5 th type tin-plated copper conductor 1 or the 6 th type tin-plated copper conductor 1, and more preferably the 5 th type tin-plated copper conductor 1. The diameter of the cross section of the cable conductor specified in GB-T3956-.
In some preferred embodiments of the present invention, the insulating rubber layer is selected from ethylene propylene rubber insulating materials, more preferably ethylene propylene diene monomer insulating materials, and the ethylene propylene diene monomer insulating materials have excellent properties of aging resistance, ozone resistance, electrical insulation, and the like, and allow the maximum working temperature of the conductor to be 90 ℃.
In some preferred embodiments of the present invention, a reinforced non-woven fabric layer 8 is disposed between the tin-plated copper conductor and the rubber insulating layer.
In some preferred embodiments of the present invention, the tinned copper conductor is selected from the group consisting of a 5 th tinned copper conductor or a 6 th tinned copper conductor, and more preferably a 5 th tinned copper conductor.
In some preferred embodiments of the present invention, the first flame retardant layer 4 and/or the second flame retardant layer 6 are selected from a low smoke halogen-free flame retardant tape, a low smoke halogen-free cable material, which is an environment-friendly cable material that is made of a rubber material that does not contain halogen (F, Cl, Br, I, At), does not contain environmental substances such as lead, cadmium, chromium, mercury, etc., and does not emit toxic smoke during combustion. The low-smoke halogen-free cable material has the advantages of excellent flame retardant property, very low smoke intensity during combustion and no corrosive gas escape. More preferably, the low-smoke halogen-free flame-retardant belt is made of glass fiber cloth and a low-smoke halogen-free flame-retardant material.
In some preferred embodiments of the present invention, due to the effects of environmental and meteorological factors, the cable may be laid in a humid environment for a long time, and water molecules may penetrate through the sheath in the radial direction, invade inside the cable, and be adsorbed by insulation, causing the electrical performance to decrease, so that the cable should have a radial waterproof function. The low-smoke halogen-free rubber sheath material has high crosslinking density, low water absorption of the rubber material and excellent waterproof performance. In addition, an expansion type water-blocking tape is wrapped outside the insulated wire core, so that the waterproof performance of the cable is further guaranteed, and the flexibility of the cable is not influenced. More preferably, the water-blocking tape is a high-speed swelling high-molecular water-absorbing resin type water-blocking tape.
In some preferred embodiments of the present invention, a layer of high flame retardant rubber oxygen-insulating layer is extruded between the insulation layer and the sheath, and the oxygen-insulating flame retardant layer is made of low smoke halogen-free flame retardant rubber oxygen-insulating material.
The flame retardant mechanism is as follows: ignition of the cable is a process of absorbing heat firstly and then releasing heat, and the cable needs to absorb a large amount of heat before ignition so that materials in the cable reach an ignition point and can be combusted. The high flame-retardant oxygen-insulating layer 5 is filled with a large amount of non-flammable inorganic hydroxide, and after being heated, the high flame-retardant oxygen-insulating layer is subjected to endothermic decomposition reaction, so that a large amount of heat can be taken away; simultaneously, a large amount of water vapor can be released, the water vapor evaporation can also take away heat, and the burning of the cable is effectively prevented through double cooling. Meanwhile, the flame-retardant belt wrapping structure can effectively ensure crusting of the oxygen-insulating layer. After flame combustion, the water is separated out and converted into insoluble and non-combustible alumina hard shell which is wrapped outside the insulation to prevent flame from entering the insulation, and the insulation is isolated from contacting with external oxygen, so that the fire behavior is controlled.
In some preferred embodiments of the present invention, the cable rubber sheath layer is made of a low-smoke halogen-free flame-retardant rubber sheath material.
The low-smoke halogen-free rubber sheath material has excellent performances of low temperature resistance, ozone resistance, aging resistance, ultraviolet resistance and the like. Meanwhile, the cold-resistant plasticizer is added to enable the rubber material to have better low temperature resistance, the rubber material is good in flexibility, the low temperature resistance can reach-40 ℃, the Shore hardness is not more than 70A, and the problem that the traditional thermoplastic halogen-free low-smoke cable material is easy to crack at low temperature is solved. The termite resistance of the finished cable meets the JB/T10696.9 standard requirement, and a colony method is adopted for carrying out cable termite test, so that the corrosion grade reaches 1 level; meanwhile, the ratproof performance meets the JB/T10696.10 standard requirement, and the protection grade is 'remarkable'.
The preparation method of the cable comprises the following steps:
bundling and twisting the single wires of the tinned copper conductor 1 to form the needed tinned copper conductor 1, extruding and wrapping the tinned copper conductor 1 with an insulating material, sequentially wrapping a water-resistant layer 3, a first flame-retardant layer 4, an extruded flame-retardant oxygen-isolating layer 5, a second flame-retardant layer 6 and an extruded cable rubber sheath layer 7 to obtain the cable.
The cable is applied to the rail transit direct-current traction cable.
The utility model provides an usage of cable in track traffic direct current traction cable for urban rail transit pulls power supply system, mainly is applicable to and pulls the feeder and the backward flow line connection of transformer substation to contact net, because its specific service environment requires, the cable has low cigarette, does not have halogen, fire-retardant, waterproof, protection against rodents, multiple special properties such as ant and ultraviolet protection, and it is intensive to satisfy the stream of people, and the important occasion of facility is to cable cleanness, environmental protection, special requirement such as fire-retardant.
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
The cable provided by the embodiment has the following materials for each layer:
tin-plated copper conductor 1: no. 5 annealed copper conductor
Rubber insulating layer 2: ethylene propylene diene monomer insulating material
Water-resistant layer 3: expansion type water-blocking tape
First flame-retardant layer 4: low smoke halogen-free flame retardant belt
Flame-retardant oxygen barrier layer 5: low-smoke halogen-free flame-retardant rubber oxygen-insulating material
Second flame-retardant layer 6: low smoke halogen-free flame retardant belt
Cable rubber sheath layer 7: a low-smoke halogen-free flame-retardant rubber sheath material.
Example 2
Specification of model voltage: FSYZ-WDZA-GDEGR 1500V 1X 400
Cable name and specification: copper core ethylene propylene rubber insulating thermosetting polyolefin sheath low smoke halogen-free class A flame retardant, rat proof, ant proof, ultraviolet proof linear rail transit soft power cable, direct current 1500V, single core, nominal section 400mm2The material of each layer thereof is selected as follows.
Tin-plated copper conductor 1: no. 5 annealed copper conductor
Reinforced non-woven fabric layer 8: reinforced non-woven fabric
Rubber insulating layer 2: polyolefin oxygen-insulating material
Water-resistant layer 3: expansion type water-blocking tape
First flame-retardant layer 4: low smoke halogen-free flame retardant belt
Flame-retardant oxygen barrier layer 5: low-smoke halogen-free flame-retardant rubber oxygen-insulating material
Second flame-retardant layer 6: low smoke halogen-free flame retardant belt
Cable rubber sheath layer 7: a low-smoke halogen-free flame-retardant rubber sheath material.
Example 3
The cable provided by the embodiment has the following materials for each layer:
tin-plated copper conductor 1: 6 th annealed copper conductor
Insulating rubber layer: ethylene propylene diene monomer insulating material
Water-resistant layer 3: expansion type water-blocking tape
First flame-retardant layer 4: low smoke halogen-free flame retardant belt
Oxygen-barrier flame-retardant layer: low-smoke halogen-free flame-retardant rubber oxygen-insulating material
Second flame-retardant layer 6: low smoke halogen-free flame retardant belt
Cable rubber sheath layer 7: a low-smoke halogen-free flame-retardant rubber sheath material.
While particular embodiments of the present invention have been illustrated and described, it will be appreciated that the above embodiments are merely illustrative of the technical solution of the present invention and are not restrictive; those of ordinary skill in the art will understand that: modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced without departing from the spirit and scope of the present invention; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; it is therefore intended to cover in the appended claims all such alternatives and modifications that are within the scope of the invention.
Claims (8)
1. The utility model provides a novel rubber sheath direct current traction cable for track traffic which characterized in that, includes tin-plated copper conductor, rubber insulation layer, water blocking layer, first fire-retardant layer, fire-retardant oxygen layer, the fire-retardant layer of second and cable rubber sheath layer that sets gradually from inside to outside.
2. The cable of claim 1, wherein a reinforced non-woven fabric layer is disposed between the tin-plated copper conductor and the rubber insulation layer.
3. The cable of claim 1, wherein the tin-plated copper conductor is selected from a 5 th tin-plated copper conductor or a 6 th tin-plated copper conductor.
4. The cable of claim 1, wherein the rubber insulation layer is an ethylene propylene diene monomer insulation layer.
5. The cable of claim 1, wherein the first flame retardant layer and/or the second flame retardant layer is a wrapped low smoke halogen free flame retardant tape.
6. The cable of claim 1, wherein the water-blocking layer is a high-speed swelling polymeric water-absorbent resin type water-blocking tape.
7. The cable of claim 1 wherein the flame retardant oxygen barrier layer is a high flame retardant rubber oxygen barrier layer.
8. The cable of claim 1, wherein the cable rubber sheath layer is a low smoke zero halogen flame retardant rubber sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921565842.6U CN210296003U (en) | 2019-09-19 | 2019-09-19 | Novel rubber sheath direct current traction cable for rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921565842.6U CN210296003U (en) | 2019-09-19 | 2019-09-19 | Novel rubber sheath direct current traction cable for rail transit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210296003U true CN210296003U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921565842.6U Active CN210296003U (en) | 2019-09-19 | 2019-09-19 | Novel rubber sheath direct current traction cable for rail transit |
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| Country | Link |
|---|---|
| CN (1) | CN210296003U (en) |
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2019
- 2019-09-19 CN CN201921565842.6U patent/CN210296003U/en active Active
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