JPH0615472Y2 - High temperature part direct connection type power cable connection part - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a high temperature direct connection type power cable connection part, and in particular, by arranging an adapter between the cable connection part and the termination connection part, The present invention relates to a high temperature part direct connection type power cable connection part that can be directly connected even at high temperatures.

[Background Art] As a method of connecting a power cable to a device or the like, a power cable in which a terminal connecting portion having a cable conductor insertion port formed in an insulating block is provided in the device and a connecting member such as a stress cone is attached It is common to connect by inserting into the terminal connection part. For example, as shown in FIG. 3, the cable insulator 1a is removed to remove the cable conductor 1b.
To the power cable 1 with the exposed
The stress cone pressing metal fitting 4 having the spring 4a between it and the stress cone 5 having the bell mouth 5a and the cable conductor 1b are fixed to a conductor 14 described later, and the two are electrically connected to each other. The cable connection portion A composed of the wedge 13 and the like is attached, and the cable conductor 1b and the wedge 13 are inserted into the fixing insertion opening provided in the conductor 14 of the terminal connection portion C embedded in the mounting device 2 and fixed at that location. The clamp metal fitting 3 of the cable connecting portion A to the epoxy member of the terminal connecting portion C.
Complete the connection by fixing to 15.

When such a power cable connecting portion is formed between devices or the like that reach a high temperature, in order to prevent the temperature at the terminal connecting portion C from exceeding the heat resistant temperature (maximum operating temperature) of the power cable 1, the terminal connecting portion is formed. By enlarging the section C, the power cable is moved away from a high-temperature device or the like to maintain a safe temperature range.

[Problems to be solved by the device]

However, according to the conventional power cable connecting part, when the terminal connecting part is enlarged, the entire device protrudes from the device and becomes large, and there is a risk that the device is damaged during transportation and loading / unloading to / from the installation place. Further, when the device itself is upgraded in terms of temperature, it is necessary to replace the terminating terminal portion, which causes a problem that the replacement work is troublesome.

The present invention has been made in view of the above, and an object of the present invention is to set the temperature decrease width freely, and
It is an object of the present invention to provide a high temperature section direct connection type power cable connecting section in which the terminal connecting section does not protrude from the high temperature equipment when the cable is not connected.

It is another object of the present invention to provide a high temperature section direct connection type power cable connecting section which does not need to replace the terminal connecting section and can be appropriately dealt with even when the high temperature equipment is thermally upgraded. .

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention arranges an adapter between a cable connecting portion and a terminal connecting portion, and incorporates a power cable integrated into the cable connecting portion via the adapter and a terminal connecting portion. A high-temperature section direct-connection type power cable connection section is provided for electrically and mechanically connecting devices to be operated.

That is, the high temperature part direct connection type power cable connection part of the present invention replaces the conventional method in which the temperature of the power cable is adjusted by projecting the terminal connection part and keeping the distance from the high temperature part,
An adapter is placed between the cable connection part and the device-side terminal connection part to keep the distance from the high temperature part appropriately by the length (distance) of the adapter. Even when the high temperature device is upgraded in temperature. It is designed so that appropriate measures can be taken only by replacing the adapter.

The direct connection type high temperature power cable of the present invention comprises the following means.

(1) Cable connection part Consists of a stress cone, metal fittings for pressing the stress cone, etc., which holds the power cable and is inserted into the coupling recess of the adapter to be described later and substantially forms the gap formed between the adapter interface Zero and connect the cable conductor to the adapter conductor.

(2) Adapter It is composed of an adapter conductor, a conductor connecting portion, a molded insulator having a coupling concave portion and a coupling convex portion, and the like.

One end of the adapter conductor is connected to the cable conductor and the other end thereof is connected to the connection conductor of the terminal connection portion, thereby enabling electrical and mechanical connection between the power cable and the high temperature device.

The conductor connecting portion is for connecting and fixing the cable conductor to the adapter conductor, and for example, tulip contacts or the like may be used in consideration of easiness of connection.

The molded insulator supports the adapter conductor and forms a coupling concave portion that receives the cable connection portion and a coupling convex portion that couples with the concave portion of the terminal connection portion. Specifically, in order to increase the heat shielding effect of the adapter. It is preferable to use a resin having a low thermal conductivity such as an epoxy resin.

It should be noted that several types of adapters having different configurations (lengths) with the above configuration are prepared, and an adapter with a length that allows the cable to have an appropriate temperature is selected and used based on the temperature of the high temperature device. In addition, a void may be provided in the non-contact interface of the coupling protrusion to reduce the cross-sectional area in order to reduce heat transfer from the terminal connection.

(3) Termination connection part It has an adapter insertion port for receiving the convex part of the adapter and a connection member such as a wedge for gripping and connecting the adapter conductor, and is embedded in the insulating block. In the embodiment, the wedge that holds the adapter conductor is provided with a spring washer-shaped current-carrying portion, and has both a wedge effect and a plug-in effect.

[Action]

With the above configuration, depending on the temperature of the high temperature part of the high temperature equipment,
The length of the adapter is determined so that the connection portion of the power cable has an appropriate temperature, and the conductor connection and the termination connection are electrically and mechanically connected via the adapter. It is more effective to provide a heat radiation fin on the outer circumference of the adapter. Further, it is preferable that the heat radiation fins have a shape that lengthens the electrical creepage.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail.

1 and 2 show an embodiment of the present invention, in which a power cable 1 having a cable insulator 1a peeled off to expose a cable conductor 1b is used with a cable connection portion A, an adapter B, and a termination connection portion C. High temperature equipment 2 (A with a heat resistance of 90 ° C or higher
It is connected to a gas transformer, etc., which uses enamel wire of Class E, Class E, etc.). The cable connection part A is a holding metal fitting 3,
It consists of a stress cone pressing metal fitting 4 having a spring 4a between the taper portion 4b and a stress cone 5 having a bell mouth 5a, and the adapter B has tulip contacts 6c and tulip contacts 6 for connecting the cable conductor 1b. Forming the attached adapter conductor 7, the coupling concave portion 8a and the coupling convex portion 8b (having a silicon packing 8d at the interface) to protect the molding insulator (epoxy resin) 8 for fixing the adapter conductor 7 and the molding insulator 8 It comprises a protective metal fitting 9. Also, the terminal connecting portion C is an adapter insertion port.
10, a wedge 11 having a spring washer-shaped conducting portion 11a, and a device-side conductor 12 connected to the cable conductor 1b of the power cable 1 via the adapter conductor 7. In addition, 8c indicates a void that reduces the cross-sectional area of the molded insulator 8 to reduce the heat transfer on the side of the terminal connection portion C.

In the above configuration, the cable insulator 1a is peeled off to form the cable connection portion A in the power cable 1 in which the cable conductor 1b is exposed. Next, connect the cable conductor 1b to the adapter B.
Of the cable connection portion A, and at the same time, the stress cone 5 of the cable connection portion A is inserted into the coupling recess 8a. Prior to this, the adapter conductor 7 is fitted into the spring washer-shaped current-carrying portion 11a, the coupling convex portion 8b is inserted into the adapter insertion port 10, and the wedge 11 connects the adapter B and the terminal connecting portion C. Here, the protective metal fitting 9 is attached to the device 2
When the fixing member 3 is fixed to the side and the pressing metal member 3 is fixed to the protective metal member 9, the stress cone pressing metal member 4 having the spring 4a is attached.
As a result, the interface between the stress cone 5 and the adapter B is brought into close contact, and the molded insulator 8 is pressed downward, so that the interface between the connecting convex portion 8b and the terminal connecting portion C is also brought into close contact. it can. Occasionally, by attaching the spring washer-shaped current-carrying portion 11a to the wedge 11 of the terminal end connecting portion C, a highly reliable plug-in connection is made possible by simply inserting the adapter conductor 7.

On the other hand, when mounting the adapter B, the tip of the adapter conductor 7 is inserted into the spring washer-shaped energizing portion 11a, so that the center is fixed and the mounting workability is good.
Since the tulip contact 6 is also used when attaching and detaching, it is simple.

By forming the high temperature part direct connection type power cable connection part as described above, the tip part of the cable conductor 1b is arranged between the cable connection part A and the termination connection part C and is the adapter B.
Thus, it can be provided at a position away from the high temperature part of the high temperature device 2. Also, by adopting a structure in which the spring washer-shaped energization portion 11a is combined in the wedge 11, both wedge connection and plug-in connection can be performed,
For example, at the time of testing the equipment at the construction site, the test may be performed by plug-in connection to the spring washer-shaped current-carrying portion 11a, and the wedge connection may be performed at the final mounting to ensure the fixation.

In the embodiment, it is used as a power cable connecting portion directly connected to a high temperature portion. However, it is also applicable to a case where the temperature is extremely low and the rubber elasticity of the stress cone 5 is lowered so that the electrical characteristics are not good. It is considered to belong to the scope of the present invention.

[Effect of device]

As described above, according to the high temperature direct connection type power cable connecting part of the present invention, an adapter is arranged between the cable connecting part and the terminating connecting part, and the power cable connected to the cable connecting part via the adapter. , Electrical termination connections,
Since the connection is made mechanically, the terminal connection portion does not project from the high temperature device, and it is possible to prevent the device from increasing in size. Further, even if the high-temperature equipment is upgraded in temperature, it is possible to deal with it by simply replacing the adapter without replacing the end connection part.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention. FIG. 2 is an explanatory view showing a wedge with a spring washer. FIG. 3 is an explanatory view of a conventional power cable connecting portion. Explanation of code 1 …… Power cable 1a …… Cable insulator 1b …… Cable conductor 2 …… Device 3 …… Pressing fitting 4 …… Stress cone pressing fitting 4a …… Spring 4b …… Tapered portion 5 …… Stress cone 5a …… Bell mouth 6 …… Tulip contact 7 …… Adapter conductor 8 …… Molded insulation 8 a …… Coupling recess 8 b …… Coupling projection 8 c …… Void 8 d …… Silicon packing 9 …… Protective metal fitting 10 …… Adapter insertion Mouth 11 ...... wedge 11a ...... spring washer-shaped current-carrying part 12 ...... device-side conductor 13 ...... wedge

Claims (2)

[Scope of utility model registration request] 1. A device direct connection type connecting part for inserting and connecting a conductor to be connected to a conductor connecting part embedded in an insulating block provided on the device side, wherein the connecting part is electrically and mechanically inserted into the conductor connecting part. An adapter conductor to be connected, a conductor connecting portion provided on the adapter conductor for connecting the adapter conductor and a conductor of a power cable, a coupling recess for fixing the adapter conductor and receiving a terminal end of the power cable, and An adapter having a molded insulating material such as epoxy resin formed with a coupling convex portion that fits with a concave portion formed in the insulating block is provided, and the adapter is provided at the end portion of the power cable and the insulating block on the device side. High temperature, which is arranged between the electric power cable and the device via the adapter conductor to make electrical and mechanical connection. Direct-type power cable connection. 2. The conductor connecting portion embedded in the insulating block has a structure for connecting the adapter conductor and a device-side conductor through a structure in which a spring washer is combined in a wedge. High temperature part direct connection type power cable connection part according to the first paragraph.