JP2902144B2 - Solid insulator coated conductor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid insulator-coated conductor covered with a solid insulator such as an epoxy resin or an insulating rubber, and more particularly to a structure of a connecting portion thereof.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a cross-sectional view showing an example of a connection portion of a conventional solid insulator-coated conductor disclosed in Japanese Unexamined Patent Publication. In the figure, reference numerals 1 and 2 are first butted but electrically connected to each other.
The second and third internal conductors 3, 3 and 4 are first and second solid insulators which fixedly cover the respective inner conductors 1, 2 and are each made of, for example, epoxy resin. In addition, first and second flange portions 3a, 4a which are abutted and joined to each other are formed at ends of the respective solid insulators 3, 4.

[0003] 5 full fin guard contact that is attached by a bolt 6 to the end of the first inner conductor 1, conductor Karadatotsu unit that provided in an end portion of the second inner conductor 2 7, 8 Bolts and nuts 9 for tightening and connecting the first and second flange portions 3a, 4a to each other are solid insulators 3,
4, a space formed by the finger contacts 5 and the conductor protrusions 7 and in which air is sealed.

[0004] In the solid insulator-coated conductor configured as described above, the finger contacts 5 have flexibility in the radial direction. By connecting the respective flange portions 3a and 4a by tightening them with bolts and nuts 8, the conductor protrusions 7 are slidably inserted into the finger contacts 5, and a contact pressure is generated between them so that the first inner conductor 1 And the second internal conductor 2 are electrically connected. The first and second inner conductors 1 and 2 have a connection structure in which the conductor protrusion 7 is inserted into the finger contact 5 for the purpose of contacting and separating as necessary.

A current flowing through the connected solid insulator-coated conductor flows from the first inner conductor 1 to the second inner conductor 2 via the finger contacts 5 and the conductor protrusions 7. At this time, the contact portion between the finger contact 5 and the conductor convex portion 7 has a contact electric resistance, and the finger contact 5 and the like itself have an electric resistance due to the specific resistance of the material. The part generates heat. Therefore, in order to prevent a problem from occurring even if the device is used for a long time in such a state where the temperature is raised, the temperature rise limit is specified in the standards of this kind of solid insulator-coated conductor.

[0006]

In the connection portion of the conventional solid insulator-coated conductor configured as described above, the contact portion between the finger contact 5 and the conductor protrusion 7 is formed in a predetermined space 9.
Are closed inside each of the solid insulators 3 and 4.
For this reason, the heat generated at this contact portion cannot escape directly to the outside, but is transferred to almost both the inner conductors 1 and 2,
Thereafter, heat is transferred from the interface between the first internal conductor 1 and the first solid insulator 3 and the interface between the second internal conductor 2 and the second solid insulator 4 to each of the solid insulators 3 and 4. Finally, heat is radiated from the surfaces of the solid insulators 3 and 4 to the outside. Therefore,
At the time of energization, the temperature in the vicinity of the contact portion tends to be the highest, and in order to increase the rated energizing capacity, in order to lower the temperature in the vicinity of the contact portion, the diameter of the finger contact 5 must be increased, In order to reduce the electric resistance of each part, such as increasing the diameter of each of the inner conductors 1, 2, etc. in response to the above, there is only a method of suppressing the conduction loss, and as a result, the outer diameter dimension increases, There have been problems such as an increase in size and cost as a whole.

[0007] The present invention has been made as a problem of solving the above problems, finger co
A solid insulator coating that facilitates heat dissipation at the connection between the contact and the projecting portion of the conductor without increasing the external dimensions, and can increase the rated current carrying capacity without increasing the overall size and cost. The purpose is to obtain a conductor.

[0008]

Means for Solving the Problems] Solid insulation coated conductor of the invention according to claim 1, the conductor projections of the finger contact
The heat conductive line which has elasticity by contacting the outer
The bar is at least one of the first and second solid insulators.
It is provided on one of the inner surfaces . In the solid insulator-coated conductor according to the second aspect of the present invention, the thickness of the distal end of the finger contact is greater than the thickness of the proximal end.
The solid insulator-coated conductor according to the invention according to claim 3 is a second solid-insulated conductor.
Finger contact to the conductor protrusion inside the insulator
The second solid insulator is made of a soft insulating rubber,
In addition, the inner peripheral surface of the end of the second solid insulator is
It comes into contact with the outer periphery of the connection part with the conductor convex part of tact
is there.

[0009]

[Action] In the invention according to claim 1, off by energization
Most of the heat generated in the vicinity of the contact portion between the finger contact and the conductor convex portion is transferred to the first or second solid through the heat conductive rubber.
Heat is transferred to the body insulator and then radiated to the outside. In the invention according to claim 2, by thicker than the proximal portion the wall thickness of the distal portion wall thickness of the finger contact, without changing stress value due to the deflection, thermal resistance and electrical resistance, etc. Most, finger Contacts Is shortened in the axial direction, thereby increasing the contact area of the interface between the first inner conductor and the first solid insulator, thereby facilitating heat dissipation. In the invention according to claim 3, the finger
The heat generated at the connection between the contact and the conductor protrusion is
Directly to the solid insulator, and then radiate heat to the outside.
You.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a sectional view showing a contact portion of a solid insulator-coated conductor according to a first embodiment of the present invention. The same or corresponding parts as those in FIG. In the figure, reference numeral 10 is a full fin guard contact that is attached by a bolt 6 to the end of the first inner conductor 1,
The finger contact 10, as in the related art guide Karadatotsu portion 7 is in contact is inserted. Further, the finger contact 10 has approximately one-third of its total length in the axial direction.
The tip portion corresponding to な い し or ３ is thicker than before, and the remaining portion, that is, the base end portion, is relatively thin. Further, the entire length of the finger contact 10 in the axial direction is shorter than in the related art.

Reference numeral 11 denotes a heat conductive rubber which is attached to the inner surface of the tip of the second solid insulator 4 and forms a part of the second solid insulator 4. The heat conductive rubber 11 has elasticity. It is made of a thin material having good properties and good thermal conductivity. The heat conductive rubber 11 is in contact with the outer periphery of the tip of the finger contact 10.

At the connection portion of the solid insulator-coated conductor configured as described above, a current flows as in the related art, and heat is generated near the contact portion between the finger contact 10 and the conductor protrusion 7. At this time, in the connection part of the above embodiment, the outer periphery of the tip part of the finger contact 10 is
Most of the heat generated in the contact portion by the current flow is transmitted from the heat conductive rubber 11 to the end of the solid insulator 4 by direct heat conduction, and is radiated to the outside from there. .

Further, the finger contact 10 has a thicker tip portion as compared with the conventional one in the entire length in the axial direction, and the remaining portion, that is, the root portion is relatively thin. And the stress due to the bending of the base end portion is reduced. For this reason, the axial length can be reduced as compared with the conventional finger contact 5 while maintaining the electric resistance value, the thermal resistance value, and the stress value due to the deflection in the conventional finger contact 5 as a whole. As a result, the axial length of the space 9 at the connection portion is reduced, and the contact area of the interface between the first inner conductor 1 and the first solid insulator 3 is increased as compared with the related art, so that the heat generated as a result is reduced. It is easy to dissipate heat.

As described above, in the solid insulator-coated conductor of the above embodiment, the heat generated in the connection portion by the energization is easily radiated without increasing the external dimensions, so that the overall size and cost are increased. It is possible to increase the rated energizing capacity without performing.

FIG. 2 shows a second embodiment of the present invention.
It is sectional drawing which shows a solid insulator covering conductor. In this example
Indicates that the second solid insulator 12 is made of soft insulating rubber.
The inner peripheral surface of the tip of the second solid insulator 12 is filled.
It is in direct contact with the outer periphery of the anchor contact 10.

In the configuration shown in FIG . 2, the second solid insulator 12 is
Because it is made of soft insulating rubber, it can
Edge 12 directly contacts finger contact 10
Also, the elastic deformation of the finger contact 10 in the conductor radial direction
The shape of the finger contact 10 is not hindered
7 can be inserted smoothly and the finger contour
The contact pressure of the conductor 10 on the conductor protrusion 7 can be secured.
Wear. Also, the finger contact 10 is
Because it is connected to the conductor protrusion 7 inside the edge 12,
1 between the solid insulator 3 and the finger contact 10
Space can be secured, and this also allows finger
The contact 10 can be elastically deformed.

In the first embodiment, the heat conductive rubber 1 is used.
1 is provided on the second solid insulator 4, but the present invention is not limited to this. For example, as shown in FIG. 3, the conductor protrusion 7 protrudes from the end face of the flange 4a, and the heat conductive rubber 11 is The contact may be provided on the first solid insulator 3 on the side where the contact 10 is provided .

[0018]

As described above, the solid insulator-coated conductor according to the first aspect of the present invention provides a conductor for a finger contact.
Heat that has elasticity by contacting the outer periphery of the connection with the body projection
The conductive rubber is made of at least the first and second solid insulators.
Since it is provided on one of the inner surfaces, it has a simple configuration
Finger without damaging the elasticity of the finger contacts.
ー The heat generated at the connection between the contact and the conductor
Heat can be efficiently transferred to the insulator, so that heat dissipation can be improved without increasing the outer dimensions, and the rated current carrying capacity can be increased without increasing the overall size and cost. .

Further, in the solid insulator-coated conductor according to the second aspect of the present invention, the thickness of the distal end of the finger contact is made larger than the thickness of the base end, so that the stress value due to deflection,
Without altering the thermal resistance and electrical resistance, etc. Most, Fi
It is possible to shorten the axial length of the banger contact , thereby increasing the contact area at the interface between the first inner conductor and the first solid insulator, thereby facilitating heat dissipation. kill at.

The solid insulator according to the third aspect of the present invention.
The insulated conductor is connected to a finger connector inside the second solid insulator.
Connect the tact to the conductor protrusion and attach the second solid insulator to the soft
Insulating rubber, and the inside of the end of the second solid insulator
Surround the outer surface of the contact area with the conductor projection of the finger contact.
Because it is in contact with the circumference, finger contacts and conductor protrusions
Heat generated at the connection with the second solid
Heat can be transferred to the rim. Also, the second solid insulation
Even if objects come into direct contact with the finger contacts,
The elastic deformation of the finger contacts in the
You can insert conductor protrusion smoothly finger con tact
As well as contact of the finger contact with the conductor
Pressure can be secured. Also, finger contour
Is connected to the conductor protrusion inside the second solid insulator.
The first solid insulator and the finger contact
A space can be secured between
The appropriate elasticity of the anchor contacts
You.

[Brief description of the drawings]

FIG. 1 is a sectional view of a connecting portion of a solid insulator-coated conductor according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating an example of a connection portion of a conventional solid insulator-coated conductor.

[Description of Signs] 1 First internal conductor, 2 Second internal conductor, 3 First internal conductor
Solid insulator, 4 second solid insulator, 7 conductor protrusion, 1
0 Finger contact.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 4/58 H01R 13/11

Claims (3)

(57) [Claims] 1. A finger contact is provided at an end.
And the first inner conductor is inserted into the finger contact and electrically connected to the first inner conductor.
A second internal conductor provided with a conductor protrusion at its end.
A body, a first solid insulator covering the first inner conductor, and a finger contact covering the second inner conductor;
End and the first end so as to seal the conductor convex portion.
A second solid insulator connected to an end of the solid insulator
And at least one of the first and second solid insulators
Is provided on the inner surface and has elasticity.
On the outer periphery of the connection part of the finger contact with the above conductor protrusion
Solid insulation coated conductor, characterized in that it comprises a thermally conductive rubber in contact. 2. A finger contact is provided at an end.
And the first inner conductor is inserted into the finger contact and electrically connected to the first inner conductor.
A second internal conductor provided with a conductor protrusion at its end.
A body, a first solid insulator covering the first inner conductor, and a finger contact covering the second inner conductor;
End and the first end so as to seal the conductor convex portion.
A second solid insulator connected to an end of the solid insulator;
Wherein the finger contact has a thickness at a distal end portion at a proximal end portion.
A solid insulator coated conductor characterized by being thicker than the thickness of the conductor. 3. A finger contact is provided at an end.
And the first inner conductor is inserted into the finger contact and electrically connected to the first inner conductor.
A second internal conductor provided with a conductor protrusion at its end.
A body, a first solid insulator covering the first inner conductor, and a finger contact covering the second inner conductor;
End and the first end so as to seal the conductor convex portion.
A second solid insulator connected to an end of the solid insulator;
Wherein the finger contacts are connected to the second solid insulator.
Connected to the conductor convex portion inside the edge object;
Solid insulator is made of soft insulating rubber.
And the inner peripheral surface of the end is above the finger contact.
It is characterized by being in contact with the outer periphery of the connection part with the conductor protrusion
Solid insulator coated conductor.