JPH0436203Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of Application of the Invention The present invention relates to an insulation processing component for terminating a power cable to an insulating support member, and particularly relates to a porcelain porcelain tube insertion type cable terminal processing component for terminating a power cable to a porcelain porcelain tube. .

Prior Art The structure of a conventional porcelain insulator tube plug-in type cable end processing part is shown in FIG. 1, partially in cross section. Reference number 1 is a conductor connection terminal, 2 is a cable conductor, 3
is an insulating compound, 4 is a porcelain insulator, 5 is a cable insulation coating, 6 is a molded stress cone, 7 is
Reference numeral 8 indicates the cable shielding coating, 8 indicates the cable, and 10 indicates the central through hole of the porcelain insulator tube.

Prior art for such a configuration includes the “Quick-Term Porcelain Termination Kits” manufactured by 3M in the United States.
5800 Series” and “JCAA-C-3101 Standard for Salt Damage Resistant Terminal Connections for 6600V Cross-linked Polyethylene Insulated Power Cables” by the Japan Electric Power Cable Accessories Industry Association.
1980" is available. To give an overview of these conventional operations, after attaching the conductor connection terminal 1 and the molded stress cone 6 to the porcelain insulator tube 4, the cable conductor 2, cable insulator sheath 5, and cable shielding sheath 7 are gradually attached from the end. Cable 8 exposed to
into the cable insertion hole of the mold stress cone 6 until the cable conductor 2 reaches the tip of the cable conductor insertion hole of the conductor connection terminal 1, and then swage the cable conductor insertion hole of the conductor connection terminal 1 to connect the cable and the conductor connection terminal. 1 is electrically connected. Furthermore, in order to insulate the gap in the center through hole 10 of the porcelain insulator, a viscous insulating compound 3 such as polyurethane resin is applied to the conductor connecting terminal 1.
Fill the insulating compound through the insulating compound filling hole (not shown). (Filling with insulation compound may be done before inserting the cable into the central through hole 10)
With the hardening of the insulating compound, the insulation process inside the porcelain insulator tube is completed. However, in the above method, although the insulating compound has fluidity, it has a high viscosity, so filling the inside of the porcelain insulator tube does not proceed smoothly and the process takes a long time. Also, the work is
Since the work will be carried out on-site where porcelain insulators should be installed,
There have been problems with uneven insulation treatment (for example, insufficient filling of insulation compound, incorporation of air or moisture, incorrect selection of compound, poor mixing, etc.).

Problems to be Solved by the Invention This invention solves the above-mentioned disadvantages and problems.Insulation inside the porcelain insulator tube can be completed by simply inserting the cable. The aim is to provide parts for That is, the object of the present invention is to provide an internal insulating part for a porcelain insulator tube, which is molded from an insulating material having elasticity and flexibility, and has a cylindrical insulating part provided with a through hole in the center in the longitudinal direction to allow the cable end to pass through. Our goal is to provide parts.

Means for solving the problem According to the present invention, there is provided an internal insulating part for a porcelain tube having an internal hole for receiving and terminating a cable terminal, said part being made of foamed insulating rubber having closed cells that are elastic and flexible, and said internal insulating part being cylindrical with a through hole provided in the center in the longitudinal direction for passing said terminal part therethrough.

The present invention will be explained below with reference to the attached drawings.

FIG. 2 shows a partially sectional view of a cylindrical insulating component used in the present invention.

In the figure, the same reference numerals as in FIG. 1 indicate the same members.
In FIG. 2, numeral 90 indicates a cylindrical insulating component having good heat resistance and moisture resistance, such as silicone rubber, EPDM rubber, or neoprene rubber. Flange-shaped gaskets 91 integrally formed are provided at both ends in the longitudinal direction of the component 90 (or the gaskets are provided by first forming the main body and then gluing separately prepared gaskets), A through hole 92 for penetrating and storing the cable is provided in the central part in the axial direction, and the part 9
0 has closed cells 93 inside to provide uniform elasticity and flexibility. Flange-shaped packing 9
1, as will be described later, is not only that no separate packing is required when attaching the porcelain porcelain tube 4 and the conductor connection terminal 1, but also that the insulating component 90 is displaced from the porcelain porcelain tube 4 when inserting the cable into the through hole 92. It has the effect of preventing Next, if the insulating component 90 does not have elasticity and flexibility, as will be described later, the workability of fitting the insulating component 90 into the porcelain insulator tube 4 and the workability of inserting the cable into the through hole 92 of the insulating component 90 will be reduced. Not only are both inferior, but also there is a gap between the cable insulator coating 5 and the inner wall surface of the through hole 92 after the cable is inserted.
This creates gaps, allowing water and moisture to enter, leading to insulation deterioration. When the insulating component 90 is molded from foamed insulating rubber having closed cells, it not only has the above-mentioned elasticity and flexibility, but also is economical because it can be easily manufactured without impairing the water resistance and moisture resistance of the insulating component itself. and is more preferable.

FIG. 3 shows the structure of the porcelain insulator tube insertion type cable end processing component of the present invention, with a partial cross section.

After press-fitting the insulating component 90 from one end of the central through hole 10 of the porcelain porcelain tube 4, the conductor connection terminal 1 and the molded stress cone 6 are attached to the porcelain porcelain tube 4 to form a porcelain porcelain tube insertion type cable end processing component.

A cable 8 with the cable conductor 2, cable insulator sheath 5, and cable shielding sheath 7 exposed in stages from the end is molded into a stress cone until the cable conductor 2 reaches the tip of the cable conductor insertion hole of the conductor connection terminal 1. The work is completed by inserting the cable through the cable insertion hole 6 and caulking the cable conductor insertion hole of the conductor connection terminal 1.

Effects of the invention As described above, when the porcelain insulator tube insertion type cable terminal processing part of the present invention is used at the cable terminal section, it is possible to handle many types of cables with different diameters, and the cable conductor, insulation coating, and shielding coating can be removed at the end. Insulating the inside of the porcelain porcelain tube is completed by simply inserting the cable exposed in stages from the porcelain porcelain tube into the cable end treatment component, and also prevents moisture from entering between the cable insulator sheath 5 and the central through hole of the porcelain porcelain tube. Since it is possible to prevent insulation deterioration by preventing insulation deterioration, not only can termination work be carried out in a short time, but also because it can be provided as a completed molded product, there is no uneven insulation treatment caused by conventional on-site construction. Furthermore, since the elastic deformation rate of the insulating parts is large, it is possible to accommodate the insertion of various types of cables. Also, since the cylinder is straight, the cable will not come off due to residual pressure after insertion.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing the structure of a conventional porcelain insulator tube type cable end processing part, Fig. 2 is a partial sectional view showing a cylindrical insulating part used in the present invention, and Fig. 3 FIG. 2 is a partial cross-sectional view showing the structure of the porcelain insulator tube insertion type cable end processing component of the present invention. In the figure 1... Conductor connection terminal, 2... Cable conductor, 3... Insulating compound, 4... Porcelain insulator tube,
5... Cable insulator coating, 6... Mold stress cone, 7... Cable shielding coating, 8... Cable, 90... Cylindrical insulation component, 91... Flange-shaped packing, 92... Through hole, 93... …closed cell,
10...Central through hole of porcelain insulator tube.

Claims (1)

[Claims for Utility Model Registration] (1) A porcelain insulator tube having a central through hole for receiving and terminating a cable end, the center through hole being made of foamed insulating rubber having closed cells and having elasticity and flexibility. , a cylindrical internal insulating component having a through hole extending through the terminal portion in the central part in the longitudinal direction is press-fitted, a conductor connection terminal is attached to one end of the porcelain porcelain tube, and a conductor connection terminal is attached to the other end of the porcelain porcelain tube. A porcelain insulator tube plug-in type cable terminal processing part with a molded stress cone attached. (2) The porcelain according to claim (1) of the utility model registration, characterized in that the internal insulating component of the porcelain insulator tube has a structure in which flanged packings are provided at both ends in the longitudinal direction. Cable end processing parts for insulator tube plug-in type.