JP2007035510A5 - - Google Patents

Description

Electrical connection device

  The present invention relates to an electrical connection device that electrically connects conductors to each other.

  In general, a vacuum valve has a movable electrode and a fixed electrode arranged facing each other, and a fixed side rod and a movable side rod are pulled out of the vacuum valve from the back of these electrodes, and the movable side rod is driven by an operating device. It is electrically opened and closed by contacting and separating from the fixed electrode to constitute a vacuum circuit breaker. The fixed-side rod and the movable-side rod drawn out of the vacuum valve are connected to the fixed-side conductor and the movable-side conductor arranged in a direction perpendicular to one side of these rods. The fixed-side conductor and the movable-side conductor are connected to the board-side conductor via an electrical connection device.

  Further, by moving the vacuum circuit breaker, the electrical connection device connects or opens between the fixed-side conductor and the movable-side conductor. The structure of such an electrical connection device is described in detail in Patent Document 1, so please refer to it.

In addition, the electrical connection device forms a block contact by combining a plurality of contact pieces, and a plurality of block contacts are connected to a plurality of electrical contacts that connect the fixed side conductor, the movable side conductor, and the board side conductor. The contact portion is formed. A plurality of energization points are formed in this electrical contact portion, and local concentration of the current is prevented by dividing the current.
JP-A-5-227612

  When a large current flows through each block contact of the electrical connection device, displacement vibrations such as left, right, up, down, and twisting occur between the block contacts due to the electromagnetic force of this current. A portion where the contact pressure is unstable is formed in the electrical contact portion of the metal, and not only a welding phenomenon occurs but also a drawback such as a short life of the electrical connection device may occur.

  An object of the present invention is to obtain an electrical connection device that allows a stable large current to flow and has a long life.

The electrical connection device according to claim 1 of the present invention is an electrical connection device for electrically connecting conductors to each other, and a block contact 14 for connecting one side conductor 16 of the conductors, and the block And a separator 15 fixed to the other side conductors 10 and 11 so as to support the contact 14, and the separator 15 has a main body portion 15 </ b> A fixed to the other side conductors 10 and 11 to the one side conductor 16 side. A plurality of extending protrusions are provided, and the protrusion is formed of a bent part 15B bent upward or downward from the main body part 15A and an intermediate part 15C bent perpendicularly from the bent part 15B to the one conductor 16 side. The block contactor 14 has a main body part 13A connected via an elastic body 13E and openings 13G, 13 for receiving the conductors 10, 11, 16 between the main body part 13A. Are formed by a plurality of pairs of contact pieces 13 provided with protrusions 13B and 13C, and projecting support portions 13F provided on the respective contact piece 13 are inserted into 15E through insertion holes provided in the main body portion 15A of the separator 15. While inserting, each contact piece 13 has been arrange | positioned between the intermediate parts 15C of the separator 15, It is characterized by the above-mentioned.

The electrical connection device according to claim 2 of the present invention is characterized in that the intermediate portion 15C of the separator 15 extends toward the one side conductor 16 beyond the center point O of the block contactor 14. 1 is described.

According to a third aspect of the present invention, there is provided the electrical connecting device according to the first or second aspect, wherein a bent portion 15D is formed at a front end of the intermediate portion 15C at a right angle toward the inside. is there.

  According to the electrical connection device of the present invention, the block contacts are supported by the separator, and the displacement vibration between the block contacts can be suppressed by the amount of the separator provided. It is possible to provide an electrical connection device having a longer life and longer life.

The best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a vacuum valve 1 according to the preferred embodiment of the present invention, and FIG. 2 is a plan view of one phase when the vacuum valve 1 is viewed from above. The vacuum valve 1 is surrounded by an insulation barrier 2 and supported by the insulation barrier 2. A fixed electrode 3 and a movable electrode 4 are disposed in the vacuum valve 1 . The fixed side rod 5 and the movable side rod 6 attached to the fixed electrode 3 and the movable electrode 4 are drawn out of the vacuum valve 1. A bellows 8 is attached between the movable side rod 6 and the end plate 7 to form a vacuum valve 1 having a vacuum inside. Then, the movable side rod 6 is driven by an electromagnetic actuator (not shown), and the movable electrode 4 is brought into contact with and separated from the fixed electrode 3 to be electrically opened and closed.

  The intermediate shield 9 is disposed between the fixed electrode 3 and the movable electrode 4 and the inner surface of the vacuum valve 1, is supported by the vacuum valve 1, and surrounds the fixed electrode 3 and the movable electrode 4. The fixed side conductor 10 and the movable side conductor 11 are attached to the fixed side rod 5 and the movable side rod 6, and the fixed side conductor 10 and the movable side conductor 11 are perpendicular to the fixed side rod 5 and the movable side rod 6 on one side. It extends in the direction. The fixed-side conductor 10 and the movable-side conductor 11 are connected to the board-side conductor 16 via the electrical connection device 12 shown in FIGS. 5 and 6 are side views of the electrical connecting device 12 when opened and connected.

Next, the structure of the electrical connection device 12 will be described. As shown in FIG. 3, the contact piece 13 of the electrical connecting device 12 has an end portion facing the fixed side conductor 10, the movable side conductor 11, and the board side conductor 16 of the contact piece main body portion 13 </ b> A. Protrusions 13B and 13C that extend in this manner are formed. A mesh-like elastic portion 13E having a hole 13D is formed between the contact piece main body portions 13A between the protruding portions 13B and 13C. This net-like elastic portion 13E has elasticity, that is, springiness. Reference numeral 13F denotes a support provided on the inner surface of the protrusion 13B. Four contact pieces 13 are arranged between the separators 15 shown in FIG. 2 to form a block contact 14. The outer surfaces of the four contact pieces 13 are supported by the separator 15.

In the separator 15, a separator body 15 </ b> A is attached to the ends of the fixed-side conductor 10 and the movable-side conductor 11 with bolts 18. In this embodiment, since the structure of the fixed side conductor 10 and the movable side conductor 11 is the same, the case where the separator 15 is used for the fixed side conductor 10 will be described. A stainless steel member is used for the separator 15. The separator 15 has a U-shaped separator main body 15A, and is bent at a right angle up and down from both ends of the separator main body 15A to form a bent portion 15B. Further, the end of each bent portion 15B is bent toward the board-side conductor 16 to form an intermediate portion 15C, and the end of the intermediate portion 15C is bent in a direction opposite to the bent portion 15B to form a bent portion 15D. That is, the bent portions 15B and 15D are bent in a direction perpendicular to the intermediate portion 15C. A plurality of projecting portions projecting toward the board-side conductor 16 are formed by the bent portions 15B and 15D and the intermediate portion 15C. An insertion hole 15E is formed between the intermediate portions 15C of the separator main body portion 15A.

  When the contact piece 13 disposed between the intermediate portions 15C of the separator 15 is pressed in the direction of the arrow A in FIG. 3, the mesh-like elastic portion 13E is compressed, and the opening 13G between the one side projections 13B becomes the other side projection. The opening 13H between the portions 13C is wider, and the supporting portion 13F from which the one-side protruding portion 13B protrudes can be easily inserted into the insertion hole 15E as shown in FIG. Then, as shown in FIG. 5, the block contact 14 is disposed between the intermediate portion 15C and the intermediate portion 15C of the separator 15, and the support portion 13F of the one-side protruding portion 13B is inserted into the insertion hole 15E. 14 is supported by a separator 15.

  Move the vacuum circuit breaker in the direction of the arrow X1 and move the electrical connection device 12 away from the board-side conductor 16 as shown in FIG. 5, or move the vacuum circuit breaker in the direction of the arrow X2 and make the electrical connection as shown in FIG. The device 12 is brought into contact with the board-side conductor 16. Next, when the block contact 14 of the electrical connection device 12 is energized from the board side conductor 16, the fixed side conductor 10 is energized from the block contact 14. At this time, the left and right vibrations generated in the block contactor 14 are suppressed by the separator 15 supporting the outer surface of the block contactor 14, and the displacement vibrations when energized are suppressed. Therefore, the block contactor 14 and the board-side conductor 16 are suppressed. In addition, the welding at the contact portion 17 with the fixed-side conductor 10 is suppressed, and the provision of the separator 15 not only allows a large current to flow stably, but also increases the life of the electrical connection device 12. It became so.

  Further, the elastic mesh portion 13E expands and contracts in response to the vibration in the vertical direction, so that the vibration in the vertical direction is absorbed, so that the displacement vibration can be suppressed. Further, even if a reverse torsional vibration is applied to the upper protrusions 13B and 13C and the lower protrusions 13B and 13C, the torsional vibration is suppressed by the separator 15 supporting the outer surface of the block contactor 14. Can be suppressed. Thus, displacement vibration can be suppressed with a simple structure in which the outer surface of the block contact 14 is supported by the separator 15.

Furthermore, in the best embodiment, the following effects can be achieved in addition to the effects described above.
(1) In order to determine the length of the intermediate portion 15C of the separator 15, a center point O is formed between the end portions B1 and B2 of the block contactor 14. When the distance between the center point O and the end portions B1 and B2 is L1 and L2, it is assumed that the relationship is L1 = L2. If the length of the intermediate portion 15C of the separator 15 is extended to the board-side conductor 16 side beyond the center point O, there is an effect of further suppressing displacement vibration. Regarding the center point O, the center point O of the block contact 14 is the same as the center point O described above. Further, in the plate-like member in which the intermediate portion 15C has the thickness portion T in the direction perpendicular to the width portion W of the intermediate portion 15C, the outer surface of the block contact 14 is preferably supported by the thickness portion T, that is, the inner portion of the plate-like member. Compared with the case where the block contactor 14 is supported by the width portion W, mechanical strength can be obtained and the block contactor 14 can be further supported, so that displacement vibration can be more effectively suppressed. The separator 15 can be easily manufactured.
(2) If both end portions of the intermediate portion 15C of the separator 15 are bent in a direction perpendicular to the longitudinal direction of the intermediate portion 15C to form the bent portions 15B and 15D, the block contactor 14 is bent by the amount of the bent portions 15B and 15D. The pressing area increases, and displacement vibration can be further suppressed. In short, the separator 15 may be provided with bent portions corresponding to the bent portions 15B and 15D so as to support the block contact 14. In addition, the bending part 15B can suppress displacement vibration more effectively if it is provided on the board-side conductor 16 side than on the fixed-side conductor 10 side . This is the same when the bent portion 15B is provided on the movable conductor 11.
(3) When the four contact pieces 13 are inserted between the intermediate portions 15C to form the block contacts 14, the contact pieces 13 are guided to the intermediate portions 15C, so that the support portions 13F are inserted into the insertion holes. It becomes easy to insert in 15E, and insertion work is easy. Further, when the contact piece 13 is arranged, when the contact piece 13 arranged between the intermediate portions 15C of the separator 15 is pressed in the direction of the arrow A, the net-like elastic portion 13E is compressed, and the one side protruding portion The opening 13G of 13B is wider than the opening 13H of the other side protrusion 13C, and the support portion 13F of the one side protrusion 13B is inserted into the insertion hole 15E. That is, pressing the contact piece 13 from the arrow A and causing it to perform the above-described function is the same as the principle of the clothespin.

In the above-described best embodiment, the block contact 14 is configured by combining four contact pieces 13. However, a block contact in which one or several pieces of the contact pieces 13 are integrally formed in advance is used. It may be configured. Further, the block contactor only needs to have an electrical connection portion in a portion in contact with the conductor, and is not limited to the above-described shape of the mouth . Furthermore, although the electrical connection device has been described by taking the vacuum circuit breaker as an example, the electrical connection device can be applied to an electrical connection device that connects a conductor such as a disconnect switch or a load switch.

  As described above, according to the electrical connection device of the present invention, by providing the separator 15, not only can a large current flow stably, but also the lifetime of the electrical connection device can be extended. Became.

It is a longitudinal cross-sectional view of the vacuum valve by embodiment of this invention. 1 is a plan view of a vacuum valve according to an embodiment of the present invention. It is a side view of the contact piece by embodiment of this invention. It is a perspective view of the separator by embodiment of this invention. It is a side view at the time of opening of an electrical connection device by an embodiment of the invention. It is a side view at the time of the connection of the electrical connection apparatus by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vacuum valve 2 ... Insulation barrier 3, 4 ... Electrode 5, 6 ... Rod 8 ... Bellows 10 ... Fixed side conductor 11 ... Movable side conductor 12 ... Electrical connection device 13 ... Contact piece 13A ... Contact piece main-body part 13B , 13C ... projection 13D ... hole 13E ... mesh-like elastic part 13F ... support part 14 ... block contact 15 ... separator 15A ... separator body part 15B, 15D ... bent part 15C ... intermediate part 15E ... insertion hole 16 ... board side conductor 17 ... Contact part

Claims (3)

In the electrical connection device for electrically connecting between conductors, a block contact 14 for connecting one side conductor 16 among the conductors, and the other side conductor 10 for supporting the block contact 14, The separator 15 is provided with a plurality of protrusions extending from the main body portion 15A fixed to the other side conductors 10 and 11 to the one side conductor 16 side. The block contactor 14 is formed of a bent part 15B bent upward or downward from the main body part 15A and an intermediate part 15C bent perpendicularly from the bent part 15B to the one side conductor 16 side. Protrusions 13B and 13C forming openings 13G and 13H for receiving the conductors 10, 11, and 16 between the connected main body 13A and the main body 13A are provided. The protruding support portions 13F formed on the contact pieces 13 are inserted into the insertion holes 15E provided on the main body portion 15A of the separator 15, and the contact pieces 13 are separated from each other. An electrical connection device, wherein the electrical connection device is arranged between 15 intermediate portions 15C . 2. The electrical connection device according to claim 1, wherein an intermediate portion 15 </ b> C of the separator 15 extends toward the one-side conductor 16 beyond the center point O of the block contact 14 . 3. The electrical connection device according to claim 1, wherein a bent portion 15 < / b > D is formed at a front end of the intermediate portion 15 < / b > C at a right angle toward the inside .