Special anti-fatigue electric connecting wire for 400-hour-speed contact network

Abstract

The utility model discloses a special anti-fatigue electric connecting wire for a 400-hour-speed contact network. The special anti-fatigue electric connecting wire has high fatigue resistance, high mechanical strength and excellent conductivity and can adapt to high-speed dynamic working conditions. The cable comprises a central unit which is formed by twisting three groups of stranded wire twisting units; the first twisted layer is twisted into a ring shape by nine groups of stranded wire twisted units; the second twisted layer is formed by twisting fifteen groups of stranded wire twisting units into a ring shape; the periphery of the central unit is surrounded by the first stranded layer, and the periphery of the first stranded layer is surrounded by the second stranded layer; each strand wire twisting unit comprises three strand wires which are formed by twisting at a central position and nine first single wires at a peripheral position, the nine first single wires surround the periphery of a central area formed by twisting the three strand wires, and the nine first single wires are arranged in a twisting manner; each strand of wire is of a 1 + 6 stranded wire structure formed by combining seven second single wires with the same diameter; the wire diameter of each first single wire is 0.7 mm; and the wire diameter of each second single wire is 0.23 mm.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of railway connecting line, specifically is 400 hour speed contact net special anti -fatigue electric connecting line. BACKGROUND

[0002] With the rapid development of high-speed railway technology, the train running speed is continuously improved, and the performance requirements of the contact net system are increasingly stringent. In the 400km / h high-speed railway contact net, the electric connecting line as a key component to ensure the continuity and stability of power transmission faces many unprecedented challenges.

[0003] At present, although the traditional contact net electric connecting line and its connecting process can basically meet the power transmission demand in the application of low-speed railway, many defects are gradually exposed when applied in the 400km / h high-speed working condition. According to the detection statistics of the electrification system of the contact net, 90% of the fractures of the electric connecting line occur at the connecting contact line side clamp port.

[0004] On the one hand, the dynamic contact force between the train pantograph and the contact net is greatly increased and fluctuates violently during high-speed operation, which makes the electric connecting line frequently bear high-intensity mechanical impact and vibration. The connection structure and material mechanical properties of the traditional electric connecting line are difficult to withstand such harsh working conditions, and problems such as loose connection, accelerated wear and even fracture are prone to occur at the connection part. The existing electric connecting line has the problem of broken strands at the work support contact line side. Through analysis, the cyclic stress generated by the vibration when the motor train pantograph passes and the tensile stress it bears are the direct causes of the strand fatigue fracture.

[0005] On the other hand, the current carrying requirement of the 400km / h contact net is significantly improved, and the electric connecting line of the traditional electric connecting line will produce a large amount of electric energy loss and heating phenomenon during the long-time transmission of large current. This not only reduces the energy utilization efficiency, but also accelerates the aging and damage of the electric connecting line and its surrounding components due to the high temperature, shortens the service life of the entire contact net system, and increases the maintenance cost and operation risk.

[0006] Therefore, in order to meet the demand of safe, efficient and stable operation of 400km / h high-speed railway contact net, it is urgent to develop a new type of electric connecting line with high fatigue resistance, high mechanical strength, excellent electrical conductivity and adaptability to high-speed dynamic working conditions. UTILITY MODEL CONTENTS

[0007] In view of the above problems, the utility model provides a 400km / h contact net special anti-fatigue electric connecting line, which has high fatigue resistance, high mechanical strength, excellent electrical conductivity and adaptability to high-speed dynamic working conditions.

[0008] The 400km / h contact net special anti-fatigue electric connecting line comprises:

[0009] a center unit formed by three groups of strand twisting units;

[0010] a first twisting layer formed by nine groups of strand twisting units in a ring shape;

[0011] and a second twisting layer formed by fifteen groups of strand twisting units in a ring shape;

[0012] the center unit is surrounded by the first twisting layer, and the first twisting layer is surrounded by the second twisting layer;

[0013] each of the strand twisting units comprises three strands twisted at a center position, nine first single wires at a peripheral position surrounding an outer periphery of the center area of the three strands, and the nine first single wires are twistedly arranged;

[0014] each strand is formed by seven second single wires of the same diameter in a 1+6 stranded wire structure.

[0015] It is further characterized in that:

[0016] each of the first single wires has a wire diameter of 0.7 mm, each of the second single wires has a wire diameter of 0.23 mm, and the cross-sectional area of the electrical connection wire is 125 mm 2 ;

[0017] each of the first single wires and the second single wires is softened by heat treatment;

[0018] all of the first single wires and the second single wires are made of the same material, and the composition of the material is 0.1 wt% of Ag, the balance of Cu, and inevitable impurities, and the total of the inevitable impurity elements is ≦0.03 wt%;

[0019] the electrical connection wire allows a continuous current carrying capacity of ≧560 A.

[0020] It is further characterized in that:

[0021] the three groups of strand twisting units at the center unit are right-twistedly arranged, the outer nine first single wires of each group of strand twisting units at the center unit are left-twistedly arranged relative to the three strands at the inner layer, and the center one second single wire of each strand of each group of strand twisting units at the center unit is right-twistedly arranged relative to the six second single wires at the outer layer;

[0022] the nine groups of strand twisting units at the first twisting layer are left-twistedly arranged, the outer nine first single wires of each group of strand twisting units at the first twisting layer are right-twistedly arranged relative to the three strands at the inner layer, and the center one second single wire of each strand of each group of strand twisting units at the first twisting layer is left-twistedly arranged relative to the six second single wires at the outer layer;

[0023] The fifteen groups of strand twisting units in the second layer are right twisted, the outer nine first single wires of each group of strand twisting units in the second layer are left bundled relative to the three strands in the inner layer, and the center one second single wire of each strand of each group of strand twisting units in the second layer is right bundled with the six outer second single wires.

[0024] After the technical scheme is used, for the railway speed-up to 400km / h, the working condition is changed, the wire section area is increased to 125mm 2 , and the problems of small transmission current, large wire heating amount, high temperature, accelerated aging and low energy utilization efficiency of the traditional pure copper 95, 120mm 2 wire are avoided; the Φ0.23mm fine wire is bundled to 0.7 single wire and then used as the center wire of the strand, so that the flexibility, fatigue resistance and tensile strength of the wire are greatly improved; the AgCu alloy material single wire is annealed, compared with the traditional pure copper single wire annealing, the former can further improve the conductivity, ductility, flexibility and fatigue resistance of the wire. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure longitudinal section schematic view of the utility model;

[0026] Figure 2 It is a layered schematic view of the utility model section schematic view;

[0027] Figure 3 It is a process diagram of longitudinal spiral electric connection using the utility model;

[0028] Figure 4 It is a process of horizontal C type electric connection using the utility model Figure 1 ;

[0029] Figure 5 It is a process of horizontal C type electric connection using the utility model Figure 2 ;

[0030] Figure 6 It is a process of horizontal S type electric connection using the utility model Figure 1 ;

[0031] Figure 7 It is a process of horizontal S type electric connection using the utility model Figure 2 ;

[0032] The names corresponding to the serial numbers in the figure are as follows:

[0033] Center unit 10, first layer 20, second layer 30, strand twisting unit 40, strand 50, first single wire 60, second single wire 70;

[0034] The electric connection wire 100, the intermediate electric connection wire 101, the spiral area 1011, the upper eight-character wire group 102, the lower eight-character wire group 103, the first electric connection wire 104, and the second electric connection wire 105;

[0035] The contact wire 1, the dropper wire 2, the messenger cable 3, the messenger cable clamp 4, and the contact wire clamp 5. DETAILED DESCRIPTION

[0036] The 400-kilometer-per-hour contact net special anti-fatigue electric connection wire is shown in Figure 1 、 Figure 2 The electric connection wire 100 includes a center unit 10, a first stranding layer 20, and a second stranding layer 30.

[0037] The center unit 10 is formed by stranding three groups of strand stranding units 40

[0038] The first stranding layer 20 is formed by stranding nine groups of strand stranding units 40 into a ring shape.

[0039] The second stranding layer 30 is formed by stranding fifteen groups of strand stranding units 40 into a ring shape.

[0040] The entire electric connection wire is formed by stranding twenty-seven groups of strand stranding units 40.

[0041] The center unit 10 is surrounded by the first stranding layer 20, and the first stranding layer 20 is surrounded by the second stranding layer 30.

[0042] Each strand stranding unit 40 includes three strands 50 strandingly formed at a center position, nine first single wires 60 at an outer position, and the nine first single wires 60 strandingly arranged around an outer periphery of the center area formed by the three strands 50.

[0043] Each strand 50 is formed by seven second single wires 70 with the same diameter into a 1+6 stranding structure.

[0044] In the specific embodiment, the diameter of each first single wire 60 is 0.7 mm, the diameter of each second single wire 70 is 0.23 mm, each first single wire 60 and second single wire 70 is softened by heat treatment, and the cross-sectional area of the electric connection wire 100 is 125 mm 2 .

[0045] In the specific embodiment, all the first single wires 60 and the second single wires 70 are made of the same material, which is composed of 0.1wt% of Ag, the balance of Cu, and unavoidable impurities, and the total amount of the unavoidable impurity elements is ≦0.03wt%.

[0046] The electric connection wire 100 allows a continuous passing current of ≧560A.

[0047] In the embodiment, the three groups of strand twisting units 40 are right-twistedly arranged in the center unit 10, the outer nine first single wires 60 of each group of strand twisting units 40 in the center unit 10 are left-bundled relative to the inner three strands 50, and the center one second single wire 70 of each strand 50 of each group of strand twisting units 40 in the center unit 40 is right-bundled with the outer six second single wires 70.

[0048] The nine groups of strand twisting units 40 are left-twistedly arranged in the first twisting layer 20, the outer nine first single wires 60 of each group of strand twisting units 40 in the first twisting layer 20 are right-bundled relative to the inner three strands 50, and the center one second single wire 70 of each strand 50 of each group of strand twisting units 40 in the first twisting layer 20 is left-bundled with the outer six second single wires 70.

[0049] The fifteen groups of strand twisting units 40 are right-twistedly arranged in the second twisting layer 30, the outer nine first single wires 60 of each group of strand twisting units 40 in the second twisting layer 30 are left-bundled relative to the inner three strands 50, and the center one second single wire 70 of each strand 50 of each group of strand twisting units 40 in the second twisting layer 30 is right-bundled with the outer six second single wires 70.

[0050] The longitudinal connection of the electric connection wire in the railway catenary is the electrical connection of the flexible suspension turnout, track and non-insulated anchor joint. The track electrical connection can connect the catenaries of each track in parallel, and the turnout electrical connection can connect the two contact suspensions at the turnout, realizing equipotential and shunt, improving the local current distribution of the contact suspension, and stably and sufficiently supplying electric energy to the locomotive.

[0051] The transverse connection of the electric connection wire realizes the connection between the catenary and the contact wire, realizes parallel power supply, increases the cross-sectional area of the conductor, reduces the impedance, meets the large current demand of the electric locomotive during starting, reduces the power loss, and ensures the power supply quality.

[0052] The connection process of the 400km / h catenary electric connection wire, the contact wire 1 in the catenary is fixed by the dropper wire 2 to parallelly suspend the catenary 3, characterized in that: the electric connection wire 100 flexibly connects the contact wire 1 and the catenary 3, ensures the smooth conversion of the current between the catenary 3 and the contact wire 1, avoids the current of the catenary 3 flowing through the dropper wire 2, the support device and the positioning device to the contact wire 1, and burns the dropper wire 2, the positioning device or makes the catenary 3 burn out.

[0053] In specific implementation, when longitudinally electrically connected, an intermediate electric connecting line 101 is arranged between the height regions of the contact line 1 of the upper part and the bearing cable 3 of the lower part, an upper splayed line group 102 is arranged at the position of the contact line 1 of the upper part, a lower splayed line group 103 is arranged at the position of the bearing cable 3 of the lower part, the upper splayed line group 102 is formed by two electric connecting lines 100 to form an upper splayed structure, the lower splayed line group 103 is formed by two electric connecting lines 100 to form a lower splayed structure, the middle part of the intermediate electric connecting line 101 in the height direction forms a spiral region 1011, the upper part of the intermediate electric connecting line 101 in the height direction clamps the lower connecting end of the upper splayed line group 102 through the bearing cable clamp 4, the lower part of the intermediate electric connecting line 101 in the height direction clamps the upper connecting end of the lower splayed line group 103 through the bearing cable clamp 4, the two ends of the splayed structure of the upper splayed line group 102 clamp the corresponding positions of the contact line 1 through the contact line clamp 5 respectively, and the two ends of the splayed structure of the lower splayed line group 103 clamp the corresponding positions of the bearing cable 3 through the bearing cable clamp 4 respectively.

[0054] The spiral region 1011 and the upper splayed structure of the upper splayed line group 102 and the lower splayed structure of the lower splayed line group 103 enable the longitudinal electric connection of the electric connecting lines 100 to be reliably buffered during the shaking process of the contact line 1 and the bearing cable 2, and ensure stable and reliable connection.

[0055] In specific implementation, when transversely electrically connected, the spacing between the contact line 1 of the upper part and the bearing cable 3 of the lower part is SH, the contact line 1 and the bearing cable 3 are connected through a first electric connecting line 104 and a second electric connecting line 105, the first electric connecting line 104 is longer than the second electric connecting line 105, the length of the first electric connecting line 104 is greater than SH, the upper end of the first electric connecting line 104 clamps the corresponding position of the contact line 1 through the contact line clamp 5, the lower end of the second electric connecting line 105 clamps the first corresponding position of the bearing cable 3 through the bearing cable clamp 4, the upper end of the second electric connecting line 105 clamps the middle segment position region of the first electric connecting line 104 through the bearing cable clamp 4, the lower end of the second electric connecting line 105 clamps the second corresponding position of the bearing cable 3 through the bearing cable clamp 4, and the lower end region of the first electric connecting line 104 and the second electric connecting line 105 combine to form a splayed structure.

[0056] In specific implementation, see Figure 3 and Figure 4 When SH≤1.00 meter, the connection of the first electric connecting line 104 and the contact line 1 and the bearing cable 3 forms a C-shaped connection, and the lower half segment of the first electric connecting line 104 and the C-shaped connection combine to form an inner splayed fixed connection (see Figure 3 ) or an outer splayed fixed connection (see Figure 4 ).

[0057] Specific connection, see Figure 5 and Figure 6 When SH>1.00 meters, the connection of the first electric connection line 104 and the contact line 1 and the bearing cable 3 forms an S-shaped connection, and the second electric connection line 105 and the lower half of the first electric connection line 104 of the S-shaped connection are combined to form an inner eight-shaped fixed connection (see Figure 5 ) or an outer eight-shaped fixed connection (see Figure 6 ).

[0058] The first electric connection line 104 uses C-shaped connection or S-shaped connection, which has a buffering function between the contact line 1 and the bearing cable 3, and the inner eight-shaped fixed connection or the outer eight-shaped fixed connection further improves the buffering performance.

[0059] The beneficial effects are as follows:

[0060] 1. For the railway speed to 400 km / h, the working condition changes, by increasing the wire cross-sectional area to 125 mm 2 , avoiding the problems of small current transmission, large wire heating, high temperature, accelerated aging, low energy utilization efficiency and other problems of traditional pure copper 95, 120 mm 2 wire;

[0061] 2. Set Φ0.23 mm fine wire bundle to 0.7 single wire as the center line of the strand, which greatly improves the flexibility, fatigue resistance and tensile strength of the wire;

[0062] 3. Using AgCu alloy material single wire annealing, compared with traditional pure copper single wire annealing, it can further improve the conductivity, ductility, flexibility and fatigue resistance of the wire;

[0063] 4. The setting of the twisting and bundling direction eliminates the stress generated between the complex stranded wire and the wire, reduces the friction between the wires, and enhances the ductility;

[0064] 5. The change of the connection process is more beneficial to the large current shunt of the contact line, the wire temperature is low, the aging resistance is enhanced, the wire shaking and dancing are reduced, the wire and clamp end abrasion and fracture are reduced, the fatigue resistance is enhanced, and the degaussing and communication signal weakening in the contact system are reduced.

[0065] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0066] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single independent technical solution, but this does not mean that each embodiment only contains one independent technical solution. The specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A fatigue-resistant electrical connection wire for 1,400 km / h overhead contact lines, characterized in that: It includes: The central unit is formed by twisting together three sets of stranded wire units; The first strand layer is formed by twisting nine strands together to form a ring; And the second strand, which is formed by twisting fifteen strands together to form a ring; The central unit is surrounded by the first stranded layer, and the first stranded layer is surrounded by the second stranded layer. Each stranded unit includes three strands twisted together at the center and nine first single wires at the periphery. The nine first single wires surround the outer periphery of the central area formed by the three strands twisted together. Each wire consists of seven second single wires of equal diameter forming a 1+6 stranded wire structure.

2. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: The diameter of each first single wire is 0.7mm; the diameter of each second single wire is 0.23mm; the cross-sectional area of ​​the electrical connection wire is 125mm². 2 .

3. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: The three strand strand units in the central unit are twisted to the right. The outer nine first single wires of each strand strand unit in the central unit are bound to the left relative to the inner three strands. The center one second single wire of each strand strand unit in the central unit is bound to the right with the outer six second single wires.

4. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: The nine strand stranding units in the first strand layer are stranded to the left. The nine outer strands of each strand stranding unit in the first strand layer are bundled to the right relative to the three inner strands. The center strand of each strand in each strand stranding unit in the first strand layer is bundled to the left with the six outer strands.

5. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: The fifteen strand strand units in the second strand layer are right-hand stranded. The nine outer first single wires of each strand strand unit in the second strand layer are left-hand bundled relative to the three inner strands. The center of each strand of each strand in the second strand layer is right-hand bundled with the six outer second single wires.

6. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: Each of the first and second single wires is heat-treated to soften it.

7. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: All first and second single wires are made of the same material, with a composition of 0.1 wt% Ag, the balance being Cu and unavoidable impurities, and the total amount of unavoidable impurity elements is ≤0.03 wt%.

8. The fatigue-resistant electrical connection wire for 400 km / h overhead contact lines according to claim 1, characterized in that: The electrical connection line is allowed to continuously carry a current of ≥560A.

Images