Contact line section insulating rod insulator

Abstract

The utility model relates to a contact line section insulating rod insulator, which comprises a core rod and two end hardware fittings, the two end hardware fittings are respectively connected and fixed at two ends of the core rod, the contact line section insulating rod insulator further comprises a first sheath and a second sheath, the first sheath wraps the outer side of the core rod, the second sheath wraps the outer side of the first sheath in a sleeving manner, and the core rod is sleeved with the first sheath. The second sheath is arranged in an integrated or segmented mode, annular grooves are formed in the inner walls of the two ends of the integrated second sheath and the inner walls of the two ends of each segment of the segmented second sheath, and sealing rings are arranged in the grooves. According to the contact line sectional insulating rod insulator, the first sheath and the second sheath are matched with the core rod, so that in the use process of the contact line sectional insulating rod insulator, the insulation reliability of a product can be better improved by utilizing a double-layer sheath structure, the damage of the product is reduced, and the cost is reduced through the arrangement of the structure of the end hardware fitting. And the efficiency and the stress upper limit of connection with external accessories are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of insulators, in particular to a contact line segmented insulating rod insulator. Background Art

[0002] With the rapid development of my country's national economy and urban construction, the population of first-tier and second-tier cities in my country is increasing. However, due to the lag in existing urban infrastructure, urban management cannot keep up with the development needs and urban traffic congestion is a serious problem. At present, the problem of traffic congestion is common in first-tier and second-tier cities in my country, which brings great trouble to the work and life of urban residents. Therefore, solving urban traffic congestion and developing rapid public transportation have become a top priority for the national economy and people's livelihood. Due to the rapid and efficient nature of urban light rail subways and their ability to make full use of underground space and save urban land resources, first-tier, second-tier cities and coastal cities are now willing to take or have taken relevant measures, hoping to improve the urban public transportation environment through the development of urban light rail transportation and subway construction.

[0003] The overhead contact network is a special form of power transmission line erected above the subway line to supply power to electric locomotives. The insulators used in this position on the overhead contact network are generally provided with a core rod and a ceramic sheath wrapped around the core rod. Since the porcelain sheath is wrapped around the outer surface of the core rod in sections, the porcelain sheath has poor dirt resistance and dirt easily accumulates on the surface, so the product is prone to power frequency flashover; on the other hand, the porcelain sheath is made of a fragile material, and the porcelain sheath is damaged or broken during the use of the product. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a contact line segmented insulating rod insulator, which solves the problems in the above background technology that the insulator used on the contact network with a ceramic sheath is prone to power frequency flashover and the sheath is easily damaged and broken during the use of the product.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A contact line segmented insulating rod insulator comprises a core rod and two end fittings, wherein the two end fittings are respectively connected and fixed to the two ends of the core rod, and further comprises a first sheath and a second sheath, wherein the first sheath is coated on the outer side of the core rod, and the second sheath is coated on the outer side of the first sheath, and the second sheath is configured as an integral type or a segmented type, and annular grooves are provided on the inner walls at both ends of the integral second sheath and on the inner walls at both ends of each segment of the segmented second sheath, and a sealing ring is provided in the groove.

[0009] Preferably, the first sheath is configured as a fire-resistant silicone rubber sheath.

[0010] In a further embodiment, the second sheath is configured as a polytetrafluoroethylene sheath.

[0011] It is further preferred that the end fitting includes a core rod connecting part and a connecting plate, wherein the connecting plate is formed at one end of the core rod connecting part, a plurality of connecting holes are formed on the connecting plate, and the connecting holes on the connecting plate all penetrate the connecting plate, and a slot matching the core rod is formed at the other end of the core rod connecting part.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a contact line segmented insulating rod insulator, which has the following beneficial effects:

[0014] In the utility model, the first sheath and the second sheath are arranged in cooperation with the core rod, so that the contact line segmented insulating rod insulator can use the double-layer sheath structure to better improve the reliability of product insulation during use, and reduce damage to the product itself;

[0015] By setting the structure of the end fittings themselves, the contact line segmented insulating rod insulator can be optimized from the compression friction connection in the prior art to a multi-bolt locking connection when connected, thereby improving the efficiency and force upper limit of the connection with external accessories, and also improving the mechanical reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a contact wire segmented insulating rod insulator according to an implementation scheme;

[0017] Figure 2 It is a schematic structural diagram of an end fitting according to an implementation scheme.

[0018] In the figure: 10, core rod; 20, first sheath; 30, second sheath; 31, groove; 40, end fitting; 41, core rod connecting part; 411, slot; 42, connecting plate; 43, connecting hole. DETAILED DESCRIPTION

[0019] 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. 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.

[0020] See also Figure 1 and Figure 2 A contact wire segmented insulating rod insulator comprises a core rod 10, a first sheath 20, a second sheath 30 and two end fittings 40. When the device is assembled, the first sheath 20 is covered on the outside of the core rod 10, the second sheath 30 is covered on the outside of the first sheath 20, and the first sheath 20 and the second sheath 30 are bonded by an adhesive, and the two end fittings 40 are respectively connected and fixed to the two ends of the core rod 10 and used to connect with the power fittings on the contact network. This contact wire segmented insulating rod insulator can form a double sheath structure using the first sheath 20 and the second sheath 30.

[0021] In this embodiment, the core rod 10 can be a solid fiberglass core rod with a diameter of 18 mm or more, so as to reduce the breakage during the use of the product, improve the tensile load of the product, and increase the overall mechanical safety margin of the product.

[0022] In this embodiment, the first sheath 20 is made of fire-resistant silicone rubber, which can be ceramic flame-retardant fire-resistant silicone rubber available in the prior art, which is a fire-resistant and flame-retardant material prepared by adding inorganic mineral powder fillers, structure control agents and other additives to a silicone rubber matrix. This material has the excellent properties of general polymers at room temperature. When encountering high temperature or flame burning, the silicone rubber composite material forms a hard ceramic protection layer, which plays a role in isolating flames and preventing fire, thereby ensuring the normal operation of electricity in the event of a fire. It is understandable that those skilled in the art can also use other flame-retardant rubber materials available in the prior art to make the first sheath.

[0023] In this embodiment, the second sheath 30 can be made of polytetrafluoroethylene material to form an integrated or segmented sheath structure. Polytetrafluoroethylene material has good dirt resistance, and the second sheath 30 of the outer layer of polytetrafluoroethylene material is not easy to be damaged and broken, and has excellent wear resistance, which improves the reliability of the product. It is understandable that those skilled in the art can also use other rubber materials with similar properties to polytetrafluoroethylene material in the prior art to make the second sheath.

[0024] In this embodiment, when the second sheath 30 adopts a segmented sheath structure, the segmented sheath structure ensures that even if one section of the insulation fails, the remaining section still has sufficient electrical safety margin.

[0025] In addition, annular grooves are provided on the inner walls at both ends of the integrated second sheath 30 and on the inner walls at both ends of each segment of the segmented second sheath 30. A sealing ring is provided in the groove 31 to prevent the entry of external water and moisture.

[0026] In this embodiment, the end fitting 40 includes a core rod connection part 41 and a connection plate 42. The connection plate 42 is formed at one end of the core rod connection part 41, and a plurality of connection holes 43 penetrating the connection plate 42 are formed on the connection plate 42. When the end fitting 40 is connected for use, the compression friction connection can be changed to a multi-bolt locking connection; when connecting, the connection plate 42 can be inserted into the gap between the power fittings to be connected, and then the bolts are passed through the connection holes 43 aligned with the two, and the connection is completed by tightening with the nut. The other end of the core rod connection part 41 is formed with a slot 411 that matches the core rod 10. When assembling, the end of the core rod 10 can be inserted into the slot 411, and then the core rod connection part 41 is pressed and fixed to the end of the core rod 10 by a crimping facility.

[0027] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not listed here one by one. In the above, all fixed connections are preferably crimped. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A contact wire segmented insulating rod insulator, comprising a core rod (10) and two end fittings (40), wherein the two end fittings (40) are respectively connected and fixed to two ends of the core rod (10), characterized in that: It also includes a first sheath (20) and a second sheath (30), wherein the first sheath (20) is coated on the outside of the core rod (10), and the second sheath (30) is coated on the outside of the first sheath (20). The second sheath (30) is configured as an integral type or a segmented type. Annular grooves are provided on the inner walls at both ends of the integral second sheath (30) and on the inner walls at both ends of each segment of the segmented second sheath (30), and sealing rings are provided in the grooves.

2. A contact wire segmented insulating rod insulator according to claim 1, characterized in that: The first protective sleeve (20) is configured as a fire-resistant silicone rubber sleeve.

3. A contact line segmented insulating rod insulator according to claim 1 or 2, characterized in that: The second sheath (30) is configured as a polytetrafluoroethylene sheath.

4. The contact wire segmented insulating rod insulator according to claim 1, characterized in that: The end fitting (40) comprises a core rod connecting portion (41) and a connecting plate (42), wherein the connecting plate (42) is formed at one end of the core rod connecting portion (41), a plurality of connecting holes (43) are formed on the connecting plate (42), and a slot (411) matching with the core rod (10) is formed at the other end of the core rod connecting portion (41).

5. A contact line segmented insulating rod insulator according to claim 4, characterized in that: The connection holes (43) on the connection plate (42) all penetrate the connection plate (42).

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