Pre-twisted anti-galloping whip and cable protection device

Abstract

The utility model discloses a pre-twisted anti-galloping whip and a cable protection device, the pre-twisted anti-galloping whip is arranged on a carrier cable, the pre-twisted anti-galloping whip comprises a whip body, and the whip body is made of a plurality of whip wires; the whip body comprises an anti-galloping section, and the anti-galloping section is wound by a plurality of whip wires to form a circular tube structure and is used for being wound on a carrier cable; winding sections are arranged at the two ends of the anti-galloping section respectively, and the winding sections can be fixedly wound on the carrier cable; when the pre-twisted type anti-galloping whip provided by the utility model is used, the anti-galloping section of the whip body is spirally wound on a carrier cable, and then the winding section is fixedly wound on the carrier cable, so that when the ice-coated carrier cable is influenced by wind power, the anti-galloping section spirally wound on the carrier cable can interfere and restrict the aerodynamic effect, and the anti-galloping whip can be used for preventing galloping. In addition, the whip body is made of the multiple metal whip wires, on one hand, the structural strength of the whip body can be improved, and on the other hand, the reliability of fixed connection between the winding section of the whip body and the carrier cable can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of line catenaries, in particular to a pre-twisted anti-galloping whip and a cable protection device. Background Art

[0002] When the wind blows on the ice-covered conductor, certain aerodynamic forces will be generated, inducing the conductor to produce a self-excited vibration with a low frequency and large amplitude. The galloping of the ice-covered conductor caused by such a relatively high wind speed is called galloping. The anti-galloping whip is an efficient product for solving the galloping of the line due to ice coating. However, the existing anti-galloping whips are all of single-root structure and made of PVC material. This product has two defects: relatively low strength, easy to age and break or fatigue and break in the anti-galloping section; insufficient grip on the conductor, easy to slide on the conductor.

[0003] The carrier cable is an important part of the electrified railway catenary system. It is mainly responsible for supporting and suspending the contact wire. In a railway with electric traction, the catenary provides continuous power supply for the high-speed running electric locomotive, and the contact wire is the wire that directly contacts the pantograph of the locomotive and transmits current. The carrier cable is arranged above the contact wire and is connected to the contact wire through the dropper, playing the role of bearing the weight of the contact wire, dispersing the tension and keeping the contact wire stable. It not only needs to have sufficient strength to bear its own gravity and wind load, but also be able to maintain the geometric position stability of the contact wire under various working conditions, ensure good contact between the pantograph and the contact wire, so as to ensure the safe and reliable power transmission. Anti-galloping is crucial for the safe operation of the carrier cable. When the wind load passes through the ice-covered carrier cable, it will cause the carrier cable to have a low-frequency, large-amplitude, and long-duration galloping that can reach more than ten hours, that is, galloping. Therefore, implementing scientific and reasonable anti-galloping design and construction for the carrier cable is one of the key links to ensure the safe and efficient operation of the electrified railway. When the existing PVC material anti-galloping whip is used for the carrier cable, the grip on the carrier cable is insufficient and it is easy to slip off; if the anti-galloping whip breaks due to fatigue, aging or slips off, the broken or slipped anti-galloping whip invading the train operation limit will bring great potential safety hazards to the train operation. Therefore, the existing PVC material anti-galloping whip products can only be used for the additional conductors of the electrified railway catenary and are not suitable for solving the galloping problem of the carrier cable. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to overcome the deficiencies in the existing related technologies. The utility model provides a pre-twisted anti-galloping whip and a cable protection device.

[0005] The utility model provides the following technical solutions:

[0006] A pre-twisted anti-galloping whip is installed on the carrier cable and includes:

[0007] A whip body, and the whip body is made of a plurality of whip wires;

[0008] The whip body includes an anti-galloping section which is formed into a circular tube structure by winding multiple whip wires, and is used to helically wind around the catenary;

[0009] Winding sections are respectively arranged at both ends of the anti-galloping section, and the winding sections can be fixedly wound around the catenary through multiple whip wires.

[0010] Among them, the catenary plays an extremely important role in the electrified railway catenary system. It suspends the contact wire through droppers and can carry a certain current to reduce the impedance of the traction network, thereby reducing voltage loss and energy consumption. Anti-galloping is crucial for the safe operation of the catenary. When a high-speed train runs, when the wind load passes through the ice-covered catenary, it will cause the catenary to undergo galloping with low frequency, large amplitude, and a duration of up to more than ten hours, that is, galloping. Continuous galloping will quickly cause fatigue fractures of the catenary and related catenary components, resulting in serious train operation safety accidents. By installing and using the preformed anti-galloping whip provided by the present utility model, the probability of such harmful galloping can be effectively reduced to maintain a stable contact pressure between the contact wire and the pantograph, ensure the continuity and reliability during the power transmission process, and avoid problems such as power supply interruption or power quality degradation caused by poor contact; and effective anti-galloping measures can prevent outages and repairs caused by line failures, maintain the normal operation order of trains, and improve transportation efficiency and service quality.

[0011] As a further improvement of the above technical solution, when winding the anti-galloping section of the present utility model around the catenary, the number of pitches of the anti-galloping section wound around the catenary at equal intervals is limited to no more than 3.

[0012] As a further improvement of the above technical solution, multiple whip wires of the winding section are arranged side by side to form a winding piece, and the winding piece can be helically wound around the catenary.

[0013] As a further improvement of the above technical solution, the winding piece of the winding section is a single-piece spiral shape.

[0014] As a further improvement of the above technical solution, a support section is provided between the anti-galloping section and the winding section, and the middle of the support section is far from the catenary.

[0015] As a further improvement of the above technical solution, the diameter of the whip wire is set as X, and the diameter of the catenary is set as Y, satisfying: X≥Y×0.25.

[0016] As a further improvement of the above technical solution, the outer diameter of the circular tube structure formed by helically winding multiple whip wires is set as Z, satisfying: Z≥Y×0.75.

[0017] As a further improvement of the above technical solution, the whip body is made of six whip wires.

[0018] As a further improvement of the above technical solution, a plurality of the whip filaments in the anti-galloping section are helically wound around each other.

[0019] As a further improvement of the above technical solution, the whip filaments are made of hard copper wires.

[0020] The present utility model further provides a cable protection device, including the pre-twisted anti-galloping whip as described in any one of the above.

[0021] Compared with the related art, the beneficial effects of the present utility model are as follows:

[0022] When the pre-twisted anti-galloping whip provided by the present utility model is in use, first, the anti-galloping section of the whip body is spirally wound around the carrier cable, and then the winding section is fixedly wound around the carrier cable. The cross-sectional shapes of each section of the complex formed by the anti-galloping section wound around the carrier cable and the carrier cable are all different. Therefore, when the wind blows through the carrier cable, the eddy current excitation directions formed behind the above different cross-sections are all different. Furthermore, the eddy current excitations formed behind different cross-sections interfere with and suppress each other, achieving the purpose of reducing the galloping excitation of the carrier cable and improving the anti-galloping ability of the carrier cable. Moreover, by using a plurality of whip filaments made of metal materials to form the whip body, on the one hand, the structural strength of the whip body can be improved to prevent the whip body from breaking; on the other hand, the reliability of the fixed connection between the winding section of the whip body and the carrier cable can also be improved to prevent the anti-galloping whip from moving on the carrier cable.

[0023] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed descriptions. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 Shows a perspective structural schematic diagram of the pre-twisted anti-galloping whip in an embodiment of the present utility model;

[0026] Figure 2 Shows Figure 1 The end face cross-sectional view at A-A therein;

[0027] Figure 3 Shows a perspective structural schematic diagram of the pre-twisted anti-galloping whip in another embodiment of the present utility model.

[0028] Description of Main Component Symbols:

[0029] 100 - Flagellum; 101 - Flagellum filament; 110 - Anti - galloping section; 120 - Winding section; 130 - Support section. Specific Embodiment

[0030] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These 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 orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides a pre-twisted anti-dancing whip, which is installed on a load-bearing cable. The pre-twisted anti-dancing whip includes a whip body 100.

[0037] The whip body 100 is made of multiple whip wires 101, and the whip body 100 includes an anti-dancing section 110. The anti-dancing section 110 is formed into a circular tube structure by winding multiple whip wires 101, and is used for spirally winding on the load-bearing cable; the two ends of the anti-dancing section 110 are respectively provided with a winding section 120, and the winding section 120 can be fixedly wound on the load-bearing cable through multiple whip wires 101.

[0038] The pre-twisted anti-dancing whip provided in the present embodiment is firstly used by spirally winding the anti-dancing section 110 of the whip body 100 on the load-bearing cable, and then fixing the winding section 120 on the load-bearing cable so that when the load-bearing cable is affected by wind, each section of the complex composed of the anti-dancing section 110 spirally wound on the load-bearing cable and the load-bearing cable has different shapes, thereby causing different directions of eddy current excitations formed behind the above-mentioned different sections when wind blows, and then the eddy current excitations formed behind different sections interfere with and suppress each other, thereby achieving the purpose of reducing the dancing excitation of the load-bearing cable and improving the anti-dancing ability of the load-bearing cable.

[0039] Moreover, the present embodiment uses a plurality of whip wires 101 to form the whip body 100, which can, on the one hand, improve the structural strength of the whip body 100, effectively avoid breakage due to its own insufficient strength, and improve the safety of use of the present embodiment; on the other hand, it can also improve the reliability of the fixed connection between the winding section 120 of the whip body 100 and the load-bearing cable, and prevent the anti-dancing section 110 of the present embodiment from moving on the load-bearing cable.

[0040] It should be particularly noted that when the anti-vibration section 110 of the preformed anti-vibration whip is wound around the carrier cable, the number of pitches of the equal-spacing winding of the anti-vibration section 110 on the carrier cable is limited to no more than 3. By limiting the number of pitches of the winding of the anti-vibration section 110, the excessive pressure on the winding sections 120 at both ends of the vibration section is avoided, so as to ensure the reliability of the fixed connection between the winding sections 120 at both ends of the anti-vibration section 110 and the carrier cable.

[0041] Of course, in other embodiments, the number of pitches of the equal-spacing winding of the anti-vibration section 110 on the carrier cable can also be 1.5, 2.0, 2.5, etc., and no further examples will be given here.

[0042] Exemplarily, during the installation of this embodiment by workers, it is necessary to pre-detect the average wind force in the environment where the carrier cable is located, so that when this embodiment is installed on the carrier cable, the pitch size of the winding of the anti-vibration section 110 is adaptively adjusted to ensure the anti-vibration performance of this embodiment; among them, if the wind force in the environment is too large, the winding pitch of the anti-vibration section 110 will be correspondingly adjusted smaller when installing this embodiment, and if the wind force in the environment is small, the winding pitch of the anti-vibration section 110 will be correspondingly adjusted larger when installing this embodiment, so that this embodiment can always provide good anti-vibration performance for the carrier cable.

[0043] It should be particularly noted that the carrier cable plays an extremely important role in the catenary system of electrified railways. It suspends the contact wire through suspension strings and can carry a certain amount of current to reduce the impedance of the traction network, thereby reducing voltage loss and energy consumption. Anti-vibration is crucial for the safe operation of the carrier cable. When a high-speed train runs, when the wind load passes through the ice-covered carrier cable, it will cause the carrier cable to undergo galloping with low frequency, large amplitude, and a duration of up to more than ten hours, that is, vibration, which affects the good contact between the contact wire and the pantograph, and even causes a wire breakage accident; while anti-vibration measures can effectively suppress these irregular movements and ensure the stability of the power supply system.

[0044] Moreover, continuous vibration and galloping will accelerate the fatigue damage of the carrier cable and related components, resulting in premature fatigue fracture of metal materials. By installing and using the preformed anti-vibration whip provided in this embodiment, this unnecessary mechanical stress can be reduced, which helps to extend the service life of the carrier cable and other catenary components.

[0045] Furthermore, by using the preformed anti-vibration whip provided in this embodiment, the probability of galloping can be reduced to maintain a stable contact pressure between the contact wire and the pantograph, ensure the continuity and reliability during the power transmission process, and avoid problems such as power supply interruption or power quality degradation caused by poor contact; and effective anti-vibration measures can prevent outages and repairs caused by line failures, maintain the normal operation order of trains, and improve transportation efficiency and service quality.

[0046] In one embodiment, multiple whip filaments 101 of the winding section 120 are arranged side by side to form a winding sheet, and the winding sheet can be spirally wound around the load-bearing cable; by arranging the whip filaments 101 at the winding section 120 side by side to form a winding sheet, when it is wound and fixed on the load-bearing cable, the contact area with the load-bearing cable is increased, thereby increasing the friction force, and thus improving the reliability of the fixed connection between the winding section 120 and the load-bearing cable; of course, in other embodiments of the present invention, the whip filaments 101 at the winding section 120 can also be set in other shapes for fixed connection with the load-bearing cable.

[0047] In one embodiment, the winding sheet of the winding section 120 is a single-piece spiral shape, which is used to reduce the processing difficulty of the shape of the winding section 120, and at the same time is convenient for installation, greatly improving the installation efficiency of this embodiment.

[0048] As Figure 3 shown, in one embodiment, a support section 130 is provided between the anti-vibration section 110 and the winding section 120, and the middle of the support section 130 is far from the load-bearing cable; by using the support section 130 as a buffer section between the anti-vibration section 110 and the winding section 120, it is convenient for workers to separately process the shapes of the anti-vibration section 110 and the winding section 120 and then install them on the load-bearing cable, which can greatly reduce the processing difficulty; of course, in other embodiments of the present invention, other structures can also be provided to reduce the processing and installation difficulty of the anti-vibration whip.

[0049] As Figure 2 shown, in one embodiment, the diameter of the whip filament 101 is set to X, and the diameter of the load-bearing cable is set to Y, satisfying: X≥Y×0.25; when X≥Y×0.25, the structural strength and connection performance of the circular tube structure formed by twisting multiple whip filaments 101 can be effectively ensured.

[0050] Of course, in other embodiments, the relationship between the diameter of the whip filament 101 and the diameter of the load-bearing cable can specifically also be X = Y×0.26, X = Y×0.28, X = Y×0.30, X = Y×0.31, X = Y×0.33, X = Y×0.35, X = Y×0.37, X = Y×0.38, X = Y×0.40, etc., and no further examples will be given here.

[0051] In one embodiment, the outer diameter of the circular tube structure formed by helically winding multiple of the whip filaments 101 is set to Z, satisfying: Z ≥ Y × 0.75. By setting the outer diameter of the circular tube structure formed by helically winding multiple of the whip filaments 101 to Z, each cross-section formed by helically winding the anti-vibration section 110 around the carrier cable has sufficient differences, and the effect of mutual interference and suppression of the eddy current excitations formed behind different cross-sections is achieved, thereby improving the usage effect of the anti-vibration section 110.

[0052] Of course, in other embodiments, the relationship between the outer diameter of the circular tube structure formed by helically winding multiple of the whip filaments 101 and the diameter of the carrier cable may specifically also be Z = Y × 0.77, Z = Y × 0.79, Z = Y × 0.81, Z = Y × 0.83, Z = Y × 0.85, Z = Y × 0.87, Z = Y × 0.89, Z = Y × 0.91, Z = Y × 0.93, Z = Y × 0.95, Z = Y × 0.97, Z = Y × 0.99, etc. Examples are not given one by one here.

[0053] In one embodiment, the whip body 100 is made of six of the whip filaments 101; by supporting the whip body 100 with six of the whip filaments 101, it can be directly produced according to existing twisting equipment during the production process, which can greatly reduce the production cost and greatly improve the production efficiency; of course, in other embodiments of the present invention, the whip body 100 can also be made of twelve of the whip filaments 101 or other quantities of the whip filaments 101.

[0054] In one embodiment, after multiple of the whip filaments 101 of the anti-vibration section 110 are helically wound around each other into a sheet, the anti-vibration section 110 is then twisted into a circular tube structure by a twisting device. When the anti-vibration section 110 is wound around the carrier cable, since the anti-vibration section 110 wound around the carrier cable is a circular tube formed by helically winding multiple of the whip filaments 101, each cross-section of the anti-vibration section 110 is also different, further increasing the difference in each cross-section of the complex formed by the anti-vibration section 110 and the carrier cable, thereby further increasing the difference in the directions of the eddy current excitations formed behind the above different cross-sections when the wind blows, and further improving the effect of mutual interference and suppression of the eddy current excitations formed behind different cross-sections, achieving the purpose of further reducing the dancing excitation of the carrier cable and improving the anti-dancing ability of the carrier cable.

[0055] In one embodiment, the whip filament 101 is a hard copper wire, which has the advantages of hard texture, not easily deformed, not aging, strong tensile performance, strong corrosion resistance, etc., and can further improve the usage reliability of the present invention; of course, in other embodiments of the present invention, other metal materials with good performance can also be used to make the whip filament 101.

[0056] Embodiment 2

[0057] The present utility model also provides a cable protection device for protecting a catenary, which includes the pre-twisted anti-vibration whip described in Embodiment 1. The cable protection device includes all the beneficial effects of the pre-twisted anti-vibration whip, and will not be described in detail herein.

[0058] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0059] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A pre-twisted anti-galloping whip is installed on the load-carrying cable, and is characterized in that, Comprising: A whip body, which is made of multiple whip filaments; The whip body includes an anti-vibration section, and the anti-vibration section is formed into a circular tube structure by winding multiple whip filaments, and is used for spirally winding on a catenary; Both ends of the anti-vibration section are respectively provided with winding sections, and the winding sections can be fixedly wound on the catenary through multiple whip filaments.

2. The pre-twisted anti-galloping whip according to claim 1, characterized in that, Multiple whip filaments of the winding section are arranged side by side to form a winding sheet, and the winding sheet can be spirally wound on the catenary.

3. The pre-twisted anti-galloping whip according to claim 2, characterized in that, The winding sheet of the winding section is a single-piece spiral shape.

4. The pre-twisted anti-galloping whip according to claim 3, characterized in that, A support section is provided between the anti-vibration section and the winding section, and the middle part of the support section is far away from the catenary.

5. The pre-twisted anti-galloping whip according to claim 1, wherein, The diameter of the whip filament is set as X, and the diameter of the catenary is set as Y, satisfying: X≥Y×0.

25.

6. The pre-twisted anti-galloping whip according to claim 5, wherein, The outer diameter of the circular tube structure formed by spirally winding multiple whip filaments is set as Z, satisfying: Z≥Y×0.

75.

7. The pre-twisted anti-galloping whip according to any one of claims 1 to 6, characterized in that, The whip body is made of six whip filaments.

8. The pre-twisted anti-galloping whip according to any one of claims 1 to 6, characterized in that, Multiple whip filaments of the anti-vibration section are spirally wound around each other.

9. The pre-twisted anti-galloping whip according to any one of claims 1 to 6, characterized in that, The whip filament is a hard copper wire.

10. A cable protection device, characterized in that, Comprising the pre-twisted anti-vibration whip according to any one of claims 1 to 9.

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