Post insulator for rail transit disconnecting switch

Abstract

The utility model discloses a post insulator for a rail transit isolating switch, which comprises an upper flange, an umbrella skirt, a lower flange and a core rod formed by dipping glass fibers in epoxy resin and then drawing, the core rod is of a solid structure, grooves are arranged at two ends of the core rod, the upper flange and the lower flange are respectively assembled in the two grooves, and the umbrella skirt is arranged on the core rod. The outer end face of the upper flange and the outer end face of the lower flange are flush with the outer end faces of the corresponding sides of the core rod respectively, and threaded holes are formed in the upper flange and the lower flange in the axial direction. And the umbrella skirts are sleeved on the core rod. The core rod is formed by dipping glass fibers in epoxy resin and then drawing, and the core rod is high in mechanical strength, not prone to being affected with damp, long in service life and safer to use.

Description

Technical Field

[0001] The utility model relates to a support insulator for a rail transit disconnector. Background Art

[0002] The post insulators used in rail transit disconnectors were previously mostly made of epoxy resin casting or porcelain insulators. Epoxy resin is easily affected by moisture, resulting in a degradation of its performance, while porcelain post insulators are prone to flashover or brittle fracture, seriously threatening the operational safety of urban rail transit. Summary of the Invention

[0003] The utility model provides a support insulator for a rail transit disconnector in order to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this utility model are:

[0005] A post insulator for a rail transit disconnector comprises an upper flange, an shed, a lower flange, and a core rod formed by drawing and forming glass fiber impregnated with epoxy resin. The core rod is a solid structure with grooves provided at both ends of the core rod. The upper flange and the lower flange are respectively assembled in the two grooves, and the outer end faces of the upper flange and the lower flange are respectively flush with the outer end faces of the corresponding sides of the core rod. Threaded holes are provided in the axial direction of the upper flange and the lower flange. The shed is sleeved on the core rod.

[0006] Furthermore, a raised step portion is provided on the outer wall of the core rod on the side where the lower flange is located, and the corresponding side of the umbrella skirt is sleeved on the step portion.

[0007] Furthermore, sealing rings are provided between the upper flange and the lower flange and the core rod respectively.

[0008] The utility model has the following beneficial effects:

[0009] The core rod of the utility model is formed by drawing after glass fiber is impregnated with epoxy resin. The core rod has high mechanical strength, is not easily affected by moisture, has a long service life, and is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of the utility model. DETAILED DESCRIPTION

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] like Figure 1The utility model discloses a support insulator for a rail transit disconnector, comprising an upper flange 1, an umbrella skirt 3, a lower flange 4 and a core rod 2. The core rod 2 is a solid structure, which is formed by drawing glass fiber impregnated with epoxy resin. Grooves are provided at both ends of the core rod 2. The upper flange 1 and the lower flange 4 are respectively assembled in the two grooves, and the outer end faces of the upper flange 1 and the lower flange 4 are respectively flush with the outer end faces of the corresponding sides of the core rod 2. Threaded holes are provided in the axial directions of the upper flange 1 and the lower flange 4.

[0013] The shed 3 is fitted over the mandrel 2. To further ensure the shed's stable assembly on the mandrel 2, a raised step is provided on the outer wall of the mandrel 2, located on the side where the lower flange 4 is located. The corresponding side of the shed 3 fits over this step. Compared to a smooth, flat outer wall, the stepped portion on the outer wall of the mandrel 2 allows the shed 3 to fit more tightly to the mandrel, preventing it from separating from the mandrel. During manufacturing, the rubber shed is either directly cast onto the outer wall of the mandrel or glued to the mandrel 2 after molding, securing the shed to the mandrel. Therefore, the present invention only requires a step on one side of the mandrel, not both ends. This ensures a tight fit while reducing manufacturing complexity and cost.

[0014] When the umbrella sleeve is integrally formed on the core rod, the entire post insulator can have better weather resistance and excellent anti-pollution performance.

[0015] To ensure sealing, sealing rings are provided between the upper flange 1 and the lower flange 4 and the core rod 2 respectively.

[0016] The core rod of the utility model is formed by drawing after glass fiber is impregnated with epoxy resin. The core rod has high mechanical strength, is not easily affected by moisture, has a long service life, and is safer to use.

[0017] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A post insulator for a rail transit disconnector, characterized in that: The invention comprises an upper flange (1), an umbrella skirt (3), a lower flange (4) and a core rod (2) formed by drawing and molding glass fiber impregnated with epoxy resin. The core rod (2) is a solid structure. Grooves are provided at both ends of the core rod (2). The upper flange (1) and the lower flange (4) are respectively assembled in the two grooves. The outer end faces of the upper flange (1) and the lower flange (4) are respectively flush with the outer end faces of the corresponding sides of the core rod (2). Threaded holes are provided in the axial directions of the upper flange (1) and the lower flange (4). The umbrella skirt (3) is sleeved on the core rod (2).

2. The rail transit disconnector post insulator according to claim 1, characterized in that: A raised step portion is provided on the core rod (2) and on the outer wall on the side where the lower flange (4) is located, and the corresponding side of the umbrella skirt (3) is sleeved on the step portion.

3. The post insulator for a rail transit disconnector according to claim 1, characterized in that: Sealing rings are provided between the upper flange (1) and the lower flange (4) and the core rod (2).

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