A device for preventing wear of a catenary cross wire turnout

Abstract

The utility model relates to a contact net cross line branch anti-abrasion device. The current anti-abrasion device has the problems of easy slipping failure, high friction coefficient, poor wear resistance and weather resistance, which makes the protection effect imperfect. The utility model discloses a first anti-abrasion component for protecting the cross point of the load cable and a second anti-abrasion component for protecting the cross point of the contact wire. The first anti-abrasion component includes a sleeved anti-abrasion sheath, which is wrapped around the load cable and has a plurality of protruding anti-abrasion edges on the outer wall. The second anti-abrasion component includes a pre-stranded anti-abrasion protection strip, which is spirally wound around the contact wire. The utility model can prevent slipping, reduce the friction coefficient, and has strong wear resistance and weather resistance.

Description

Technical Field

[0001] This utility model relates to the field of overhead contact line maintenance technology for electrified railways, specifically to an anti-wear device for overhead contact line crossover switches. Background Technology

[0002] Electrified railways are an important form of modern rail transit. Their power comes from the catenary system, which is in direct sliding contact with the locomotive's pantograph. This system usually consists of a catenary and a contact wire. The catenary mainly bears the tension, and the contact wire is suspended at a certain height by droppers.

[0003] Both the catenary and the contact wire are subjected to considerable working tension during installation. Changes in ambient temperature can cause significant expansion and contraction of the catenary and contact wire. If the parameters such as the raising and positioning of the wires are not properly controlled during construction, adjacent wires will experience relative displacement and irregular swaying when the temperature changes, resulting in continuous mechanical friction and wear. At the same time, windy and sandy environments will exacerbate wear. Long-term mechanical wear will cause local deformation such as deep grooves and pits on the surface of the wires (especially the contact wire), reducing its effective cross-sectional area. This not only affects the conductivity but, more seriously, significantly reduces the tensile strength of the wires. When the wear develops to a certain extent, under the action of dynamic tension, stress concentration can easily occur at the point of most severe wear, leading to breakage, which poses an extremely serious threat to railway traffic safety. In addition to pure mechanical wear, there is also a risk of electrochemical corrosion at turnout intersections. The electrochemical corrosion process erodes metal materials at an extremely fast rate. Mechanical wear and electrochemical corrosion promote each other, forming a vicious cycle that drastically shortens the service life of the wires.

[0004] Currently, the common solution to the problem of wear at intersections is to install protective sleeves. However, this anti-wear measure is relatively simple, and these traditional protective measures are prone to slippage failure, have a high coefficient of friction, and poor wear and weather resistance, resulting in imperfect protection.

[0005] Therefore, there is an urgent need for a wear-resistant device that can prevent slippage, reduce friction, and is highly wear-resistant and weather-resistant. Summary of the Invention

[0006] The purpose of this invention is to provide a wear-resistant device for overhead contact line crossovers, which can at least solve the problems of easy slippage failure, high friction coefficient, and poor wear resistance and weather resistance of existing wear-resistant devices.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A wear-resistant device for overhead contact line crossing points includes a first wear-resistant component for protecting the crossing points of the catenary wires and a second wear-resistant component for protecting the crossing points of the contact wires. The first anti-wear component includes a set-type anti-wear sleeve, which covers the load-bearing cable, and the outer wall of the set-type anti-wear sleeve is provided with several raised anti-wear ridges. The second anti-wear component includes a pre-stirred anti-wear protective strip, which is spirally wound around the contact wire.

[0008] Furthermore, the fitted anti-wear sleeve includes two petals, which are symmetrically arranged on the load-bearing cable to form a cylindrical sleeve.

[0009] Furthermore, the inner wall of the valve is embedded with a layer of steel grit, which is embedded in the surface of the load-bearing cable.

[0010] Furthermore, the two valves are closed and fixed by a connector.

[0011] Furthermore, the connector is a grooved buckle, which includes a male head and a female seat. The male head is provided on the lower end face of one of the valve bodies, and the female seat is provided on the lower end face of the other valve body.

[0012] Furthermore, the male head is a barb, and the female seat is a slot corresponding to the barb.

[0013] Furthermore, the anti-wear ridges are spaced axially on the outer surface of the petal body.

[0014] Furthermore, the adjacent load-bearing cables at the intersection point have multi-point line contact.

[0015] Furthermore, the pre-twisted abrasion-resistant protective strip includes an internal metal wire core and a high-temperature resistant nylon outer sheath covering the outer wall of the metal wire core.

[0016] Furthermore, the metal wire core is pre-formed by spirally winding multiple metal wires.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a wear-resistant device for contact wire crossings, which is equipped with a sleeve-type wear-resistant sleeve for protecting the crossing points of the catenary wires and a pre-twisted wear-resistant protective strip for protecting the crossing points of the contact wires. The inner wall of the sleeve-type wear-resistant sleeve is provided with a steel grit layer. The steel grit layer increases the friction between the sleeve and the catenary wire through its embedding effect, preventing the sleeve from slipping due to the relative displacement of the catenary wires, thereby ensuring the continuous effectiveness of the protection.

[0018] 2. This utility model, by setting anti-wear ridges on the outer wall of the petal, transforms the surface contact at the intersection of the load-bearing cables into multi-point line contact, significantly reducing the contact area and thus greatly reducing friction and wear; by covering the outer wall of the metal wire core of the pre-twisted anti-wear protective strip with a high-temperature resistant nylon jacket, the mechanical wear between adjacent contact lines at the intersection is reduced by utilizing its low coefficient of friction.

[0019] 3. The set of anti-wear protective sleeves and high-temperature resistant nylon outer jackets of this utility model are both made of high-temperature resistant and weather-resistant engineering nylon material. They have a low coefficient of friction and high wear resistance, can adapt to the harsh climate of the Gobi Desert with large temperature differences between day and night and strong ultraviolet radiation, and have a long service life and high reliability.

[0020] 4. This utility model provides targeted protection based on classification, and its simple structure and easy installation can effectively extend the service life of the guide wire and prevent major traffic accidents caused by wear and breakage, resulting in significant economic and safety benefits. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the utility model's set-type anti-wear sleeve installed at the intersection of the catenary cable; Figure 2 This is a schematic diagram of the structure of the kit-type anti-wear protective sleeve of this utility model; Figure 3 This is a schematic diagram of the valve structure of this utility model; Figure 4 This is a schematic diagram of the structure of the pre-twisted anti-wear protective strip of this utility model; Figure 5 This is a schematic diagram of the structure of the pre-twisted anti-wear protective strip of this utility model installed on the contact wire; The diagram is labeled as follows: 1-Set of anti-wear sleeves, 11-Petal body, 12-Groove buckle, 13-Steel grit layer, 14-Anti-wear ridge, 2-Pre-twisted abrasion-resistant protective strip, 21-Metal wire core, 22-High-temperature resistant nylon jacket, 3-Package wire, 4-Contact wire. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0027] Example: This embodiment provides a wear-resistant device for overhead contact line crossovers, including a first wear-resistant component for protecting the crossover points of the catenary wires 3 and a second wear-resistant component for protecting the crossover points of the contact wires 4.

[0028] Specifically, such as Figure 1 As shown, the first anti-wear component includes a set-type anti-wear sleeve 1, which covers the intersection of the load-bearing cable 3, and the outer wall of the set-type anti-wear sleeve 1 is provided with several raised anti-wear ridges 14.

[0029] Among them, such as Figure 2 and Figure 3 As shown, the kit-type anti-wear sleeve 1 includes two petals 11, both of which are semi-circular. The petals 11 are symmetrically arranged on the load-bearing cable 3 to form a cylindrical sleeve.

[0030] In this embodiment, a steel grit layer 13 is embedded in the inner wall of the petal 11. After the two petals 11 are fastened, the steel grit layer 13 is tightly embedded in the surface of the load-bearing cable 3. The steel grit layer 13 provides anti-slip friction. The embedding effect of the steel grit layer 13 increases the friction between the petal 11 and the load-bearing cable 3, preventing the petal 11 from slipping due to the relative displacement of the load-bearing cable 3, thereby ensuring the continuous effectiveness of the protection.

[0031] The two petals 11 are closed and fixed by a connector. In this embodiment, the connector is a groove buckle 12, which includes a male head and a female seat. The male head is integrally provided on the two lower end faces of one petal 11, and the female seat is integrally provided on the two lower end faces of the other petal 11. The closure and fixation between the two petals 11 are achieved by the snap-fit ​​and interlocking between the male head and the female seat. The male head is a barb, and the female seat is a groove corresponding to the barb. The two semi-circular petals 11 are symmetrically placed at the intersection of the load-bearing cable 3 that needs to be protected. The male head on one side of the petal 11 is initially aligned with the corresponding female seat on the other side of the petal 11. The two petals 11 are then closed by force. During the closing process, the barb will contact the entrance edge of the groove. When the barb is fully engaged in the groove, a mechanical interlock is formed.

[0032] Specifically, the anti-wear ridge 14 is integrally disposed on the outer surface of the petal body 11 at intervals along the axial direction. The anti-wear ridge 14 makes the adjacent load-bearing cables 3 at the intersection point make multi-point line contact, significantly reducing the contact area and thus reducing friction loss. The height of the anti-wear ridge 14 is 2-4mm. In this embodiment, the height of the anti-wear ridge 14 is 3mm.

[0033] The set of anti-wear protective sleeves 1 is made of high temperature and weather-resistant engineering nylon material. It has a low coefficient of friction and high wear resistance, and can adapt to the harsh climate of the Gobi Desert with large temperature difference between day and night and strong ultraviolet radiation. It has a long service life and high reliability.

[0034] In this embodiment, the length of the set-type anti-wear sleeve 1 is 1m. In other embodiments, it can be spliced ​​and installed as needed to extend the protection range.

[0035] Specifically, such as Figure 5 As shown, the second anti-wear component includes a pre-twisted anti-wear protective strip 2, which is spirally wound around the contact wire 4.

[0036] Among them, such as Figure 4 As shown, the pre-twisted abrasion-resistant protective strip 2 includes an internal metal wire core 21 and a high-temperature resistant nylon outer jacket 22 covering the outer wall of the metal wire core 21.

[0037] The metal wire core 21 is pre-formed by spirally winding multiple metal wires (such as aluminum alloy wires). The metal wire core 21 is directly wrapped and tightened at the intersection of the contact wire 4. The metal wire core 21 provides strong gripping force and good conductivity, ensuring smooth electrical connection and avoiding electro-corrosion caused by potential difference.

[0038] The thickness of the high-temperature resistant nylon jacket 22 is 2-3mm. The high-temperature resistant nylon jacket 22 can reduce the coefficient of friction and reduce wear. The adjacent contact lines 4 at the intersection point are in direct contact through the outer high-temperature resistant nylon jacket 22. Its low coefficient of friction can reduce mechanical wear. In addition, the high-temperature resistant nylon jacket 22 is resistant to high temperature and weathering.

[0039] The installation process in this embodiment is as follows: At the intersection of the catenary cable 3, the first anti-wear component is installed, which covers the catenary cable 3 with two symmetrical petals 11, and then the two petals 11 are closed and fixed by the groove buckle 12 to form a complete cylindrical sheath.

[0040] At the intersection of contact wires 4, a second anti-wear component is installed by directly spirally winding the pre-twisted anti-wear protective strip 2 onto contact wires 4.

[0041] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A wear-resistant device for overhead contact line crossover switches, characterized in that: It includes a first anti-abrasion component for protecting the cross points of the catenary (3) and a second anti-abrasion component for protecting the cross points of the contact wire (4); The first anti-wear component includes a set-type anti-wear sleeve (1), which covers the load-bearing cable (3), and the outer wall of the set-type anti-wear sleeve (1) is provided with several raised anti-wear ridges (14). The second anti-wear component includes a pre-twisted anti-wear protective strip (2), which is spirally wound around the contact line (4).

2. The wear-resistant device for overhead contact line crossovers according to claim 1, characterized in that: The set-type anti-wear sleeve (1) includes two petals (11), which are symmetrically arranged on the load-bearing cable (3) to form a cylindrical sleeve.

3. The wear-resistant device for overhead contact line crossovers according to claim 2, characterized in that: The inner wall of the petal (11) is embedded with a steel grit layer (13), which is embedded in the surface of the load-bearing cable (3).

4. The wear-resistant device for overhead contact line crossovers according to claim 2, characterized in that: The two valves (11) are closed and fixed by a connector.

5. The wear-resistant device for overhead contact line crossovers according to claim 4, characterized in that: The connector is a groove buckle (12), which includes a male head and a female seat. The male head is provided on the lower end face of one of the valve bodies (11), and the female seat is provided on the lower end face of the other valve body (11).

6. The wear-resistant device for overhead contact line crossovers according to claim 5, characterized in that: The male end has a barb, and the female end has a slot corresponding to the barb.

7. The wear-resistant device for overhead contact line crossovers according to claim 2, characterized in that: The anti-wear ridges (14) are spaced axially on the outer surface of the petal body (11).

8. The wear-resistant device for overhead contact line crossovers according to claim 1, characterized in that: The adjacent load-bearing cables (3) at the intersection are in multi-point line contact.

9. The wear-resistant device for overhead contact line crossovers according to claim 1, characterized in that: The pre-twisted abrasion-resistant protective strip (2) includes an inner metal wire core (21) and a high-temperature resistant nylon outer jacket (22) covering the outer wall of the metal wire core (21).

10. The wear-resistant device for overhead contact line crossovers according to claim 9, characterized in that: The metal wire core (21) is preformed by spirally winding multiple metal wires.

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