Wear-resistant copper alloy contact line structure for rigid suspension of subway
By designing a wear-resistant copper alloy contact wire structure, the problem of easy wear of existing contact wires is solved, and the effect of extending service life and reducing operation and maintenance costs is achieved.
Patent Information
- Application Number
- CN202420127986.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-18
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-01-18
AI Technical Summary
The contact line structure of the existing subway rigid contact network is prone to wear, resulting in a reduced service life of contact lines and pantograph carbon skateboards and increasing operation and maintenance costs.
Design a wear-resistant copper alloy contact line structure for rigid suspension of subways. Its section is symmetrical with left and right, which increases the radius of curvature of the large arc surface and increases the contact surface between the contact line and the pantograph. , slows down mechanical wear.
By increasing the contact surface between the contact line and the pantograph, the pressure is reduced, the wear is reduced, the service life of the contact line and pantograph is extended, the operation and maintenance costs are reduced, and the current carrying capacity of the contact line is improved.
Smart Images
Figure CN222496122U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rigid contact networks, in particular to a wear-resistant copper alloy contact wire structure for rigid suspension of subways. Background Art
[0002] The rigid contact network of the subway is different from the flexible contact network of the high-speed rail. The subway generally adopts a low-voltage, high-current DC power supply mode. The contact wire is fixed in the busbar after installation. There is no need to apply tension at both ends of the contact wire to ensure the straightness of the wire, so the wire does not need too high tensile strength. At present, the circular CTA contact wire structure is generally used in rigid overhead contact networks at home and abroad. The contact wire of this circular structure has the following problems: when the pantograph and the contact wire do not cooperate well and arcing occurs, it will cause contact wire ablation, which will lead to serious wear of the contact wire. At the same time, the ablation and wear of the contact wire will also aggravate the uneven wear of the pantograph carbon slide and the arcing between the pantograph and the slide, thus forming a vicious circle, which will eventually reduce the service life of the contact wire and the pantograph carbon slide, increase the operation and maintenance costs, and other problems. At present, the rigid overhead contact networks of many domestic subway lines have serious problems of contact wire ablation and wear. Utility Model Content
[0003] The purpose of the utility model is to design a wear-resistant copper alloy contact wire structure for subway rigid suspension to solve the problems that the existing contact wire structure is easily worn, which easily causes the service life of the contact wire and the pantograph carbon slide to be reduced, and the operation and maintenance costs to be increased.
[0004] To solve the above problems, the utility model is implemented through the following technical solutions:
[0005] A wear-resistant copper alloy contact wire structure for subway rigid suspension is designed, which includes a contact wire body, and the cross-section of the contact wire body is a flat gourd-shaped structure with bilateral symmetry;
[0006] Two grooves are symmetrically arranged on both sides of the contact wire body, and the upper and lower parts of the contact wire body are transitionally connected through the grooves; the upper part of the contact wire body is used for clamping the busbar, and the lower part is used as the working surface of the contact wire, which is used to contact the carbon slide plate of the pantograph to collect electricity;
[0007] The upper part of the contact wire body is composed of a first arc surface with a radius of R1, and two identification grooves are symmetrically arranged on the first arc surface; the lower part of the contact wire body is composed of two second arc surfaces with a radius of R2 and a third arc surface with a radius of R3; wherein: R3>R2≥R1.
[0008] Furthermore, a wear-resistant copper alloy contact wire structure for subway rigid suspension: the identification groove is an arc-shaped groove with a radius not greater than 0.5 mm, and the center of the arc-shaped groove is on the arc line of the first arc surface.
[0009] Furthermore, a wear-resistant copper alloy contact wire structure for subway rigid suspension: an angle β is formed between the center of the two identification grooves and the line connecting the center of the circle where the first arc surface is located, and satisfies 10°≤β≤90°.
[0010] Furthermore, a wear-resistant copper alloy contact wire structure for subway rigid suspension: the two groove surfaces of the groove form an angle α, and satisfy 60°≤α≤80°
[0011] Furthermore, a wear-resistant copper alloy contact wire structure for subway rigid suspension: the distance between the bottoms of the two grooves is L, and L≥6.5mm.
[0012] Further, a wear-resistant copper alloy contact wire structure for subway rigid suspension: R2 = R1. Preferably, the radius R2 is the same as the radius R1.
[0013] Furthermore, a wear-resistant copper alloy contact wire structure for subway rigid suspension: R3 is greater than or equal to 2 times R2. R3≥2R2.
[0014] Furthermore, a wear-resistant copper alloy contact wire structure for rigid suspension of subways: the distance from the bottom of the groove to the top of the contact wire is H1, and the distance to the bottom of the contact wire is H2, satisfying H2>H1.
[0015] Furthermore, a wear-resistant copper alloy contact wire structure for subway rigid suspension: H2 is greater than or equal to 3 times H1. H2 ≥ 3H1.
[0016] Furthermore, a wear-resistant copper alloy contact wire structure for rigid suspension of subway: the third arc surface is used as the working surface of the contact wire to contact the carbon slide plate of the pantograph to draw electricity.
[0017] Beneficial effects of the utility model:
[0018] (1) The wear-resistant copper alloy contact wire structure for subway rigid suspension designed by the utility model is a flat contact wire structure, which increases the curvature radius of the large arc surface. Compared with the original contact wire, the bottom of the contact wire (i.e., the working surface) is flatter, and the contact surface between the contact wire and the pantograph is increased, thereby reducing the pressure between the pantograph and the contact wire, slowing down mechanical wear, and making the contact wire less prone to wear.
[0019] (2) Due to the structural design of the contact wire of the utility model, the contact surface between the contact wire and the pantograph is increased, which can obtain a better current collection effect, thereby alleviating the arcing, sparking and other electrical erosion phenomena in the process of accelerating current collection. At the same time, the contact wire structure designed by the utility model redesigns the proportional relationship between the upper and lower parts of the contact wire, and has more wearable height while ensuring that the contact wire can match the bus, thereby improving the utilization rate of the contact wire material and reducing the frequency of line replacement.
[0020] (3) The utility model designs a contact wire structure with a larger cross-section that can match the existing rigid contact network, thereby improving the current-carrying capacity of the wire and being more suitable for the application characteristics of large currents in subways. This makes the current density per unit cross-section of the contact wire relatively lower, reduces the effect of conductive temperature rise on wire softening, and reduces the energy consumption of subway operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 A schematic diagram of a wear-resistant copper alloy contact wire structure for subway rigid suspension designed by the utility model;
[0023] Figure 2 for Figure 1 Magnified view of area A.
[0024] Markings in the figure: 1-contact wire body, 2-groove, 3-identification groove, 11-first arc surface, 12-second arc surface, 13-third arc surface. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate positions or positional relationships, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.
[0027] Example 1
[0028] like Figure 1 As shown, a wear-resistant copper alloy contact wire structure for subway rigid suspension is designed, characterized in that it includes a contact wire body 1, and the cross-section of the contact wire body 1 is a flat gourd-shaped structure that is bilaterally symmetrical;
[0029] Two grooves 2 are symmetrically arranged on both sides of the contact line body 1. The upper part and the lower part of the contact line body 1 are transitionally connected through the grooves 2. The grooves 2 are arranged to facilitate the installation of the wire clamp and suspend the contact line without affecting the sliding current collection of the pantograph slide plate. At the same time, an angle α is formed between the two groove surfaces of the groove 2, and satisfies 60°≤α≤80°. The upper part of the contact line body 1 is used for clamping the busbar, and the lower part is used as the working surface of the contact line to contact the carbon slide plate of the pantograph to collect electricity.
[0030] The upper part of the contact wire body 1 is composed of a first arc surface 11 with a radius R1, and two marking grooves 3 (such as Figure 2 As shown), the marking groove 3 is an arc-shaped groove with a radius not greater than 0.5 mm, and the center of the arc-shaped groove is on the arc line of the first arc surface 11. The centers of the two marking grooves 3 are connected with the center of the first arc surface 11, and an angle β is formed between the connecting lines, and 10°≤β≤90° is satisfied;
[0031] The lower part of the contact wire body 1 is composed of two second arc surfaces 12 with a radius R2 and a third arc surface 13 with a radius R3. The third arc surface 13 is used as the working surface of the contact wire to contact the pantograph carbon slide plate to collect electricity; wherein: R3≥2R2, R2=R1;
[0032] The distance from the bottom of the groove 2 to the top of the contact line is H1, and the distance from the bottom of the groove 2 to the bottom of the contact line is H2, and H2≥3H1 is satisfied.
[0033] The above preferred embodiments of the utility model are only used to explain the utility model, and are not used to limit the utility model. Any obvious changes or modifications derived from the technical solution of the utility model are still within the protection scope of the utility model.
Claims
1. A wear-resistant copper alloy contact wire structure for subway rigid suspension, characterized in that: It comprises a contact wire body (1), wherein the cross section of the contact wire body (1) is a bilaterally symmetrical flat gourd-shaped structure; Two grooves (2) are symmetrically arranged on both sides of the contact wire body (1), and the upper part and the lower part of the contact wire body (1) are transitionally connected through the grooves (2); the upper part of the contact wire body (1) is used for clamping the busbar, and the lower part serves as the working surface of the contact wire, and is used for contacting the pantograph carbon slide plate to draw electricity; The upper part of the contact wire body (1) is composed of a first arc surface (11) with a radius R1, and two marking grooves (3) are provided on the first arc surface (11) in a bilaterally symmetrical manner; The lower part of the contact wire body (1) is composed of two second arc surfaces (12) with a radius R2 and a third arc surface (13) with a radius R3; wherein: R3>R2≥R1.
2. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1 is characterized in that: The marking groove (3) is an arc-shaped groove with a radius not greater than 0.5 mm, and the center of the arc-shaped groove is located on the arc line of the first arc surface (11).
3. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 2, characterized in that: An angle β is formed between the center of the two marking grooves (3) and the line connecting the center of the circle where the first arc surface (11) is located, and satisfies 10°≤β≤90°.
4. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1, characterized in that: An included angle α is formed between the two groove surfaces of the groove (2), and satisfies 60°≤α≤80°.
5. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1, characterized in that: The distance between the bottoms of the two grooves (2) is L, and L≥6.5 mm.
6. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1, characterized in that: R2=R1.
7. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1, characterized in that: R3 is greater than or equal to 2 times R2.
8. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1, characterized in that: The distance from the bottom of the groove (2) to the top of the contact line is H1, and the distance from the bottom of the groove (2) to the bottom of the contact line is H2, satisfying H2>H1.
9. The wear-resistant copper alloy contact wire structure for rigid suspension of subway according to claim 8, characterized in that: H2 is greater than or equal to 3 times H1.
10. The wear-resistant copper alloy contact wire structure for subway rigid suspension according to claim 1, characterized in that: The third arc surface (13) serves as a working surface of the contact line to make contact with the pantograph carbon slide plate to draw electricity.