JP4377289B2 - Large current power supply device and mobile power supply device using the same - Google Patents

Description

  The present invention relates to a high-current power supply device that sequentially supplies power to a plurality of load facilities that require high-current power supply using a set of power supply devices, and a mobile power supply device using the same.

  One of the load facilities that require a large current supply is a graphitization furnace. This graphitization furnace is a facility for crystallizing a graphite electrode by heating carbon put in a heating furnace to a high temperature by flowing a large current. Many heating furnaces are installed side by side. Since heated carbon is crystallized by natural cooling, a power source is only required during heating. Therefore, a method of reducing the capital investment by sharing a set of mobile power supply devices has been adopted.

  As the mobile power supply device for the graphitization furnace, one using a water-cooled cable has been conventionally used, but this has the following problems to be solved.

  A graphitization furnace generally requires a conductor having a large capacity because a large current of 10 KA to 200 KA or more flows. In addition, since the terminals on the graphitization furnace generate heat when energized and expand, and a conductor that can absorb the transition of the connection point due to this is required, a dozen or so wires are combined with the mobile power supply for the graphitization furnace. A water-cooled cable weighing several tons was used.

  This water-cooled cable was suspended by a manual winch, and the terminal at the end of the cable was connected to the terminal on the graphitization furnace with bolts. However, this conventional mobile power supply device takes a great deal of time and effort to switch the connection. In short, it became a bottleneck and the operating rate of the equipment was decreasing. There was also a problem that the equipment was large.

  The present invention makes it possible to stably supply a large current to a load facility such as a graphitization furnace with a small device that does not use a water-cooled cable, and also makes it possible to easily switch the connection before and after feeding. It is an object of the present invention to provide a high-current power supply device and a mobile power supply device that can efficiently and sequentially flow a large current to a plurality of load facilities using the same.

In order to solve the above-mentioned problems, in the present invention, a conductor plate connected to the power supply side terminal, a flexible conductor fixed to one end of the conductor plate and opposed to each other vertically, and the other ends of the upper and lower flexible conductors Clamping mechanism for moving the sides closer to and away from each other, horizontally long upper and lower contacts fixed to the opposite surfaces of the upper and lower flexible conductors, a load equipment side conductor plate connected to load equipment, and the upper part A disconnector comprising pressing means for pressing the contact and the lower contact against the upper and lower surfaces of the load equipment side conductor plate,
The clamp mechanism includes a drive source and a floating link that is disposed on both sides of the flexible conductor and receives a pressing reaction force applied to the pressing means of the upper contact and the lower contact,
Provided is a large-current power feeding device configured to supply power from a power source to a load facility by sandwiching a load facility side conductor plate between an upper contact and a lower contact of the disconnector.

The clamp mechanism includes a floating link provided with an upper protrusion and a lower protrusion at the upper and lower portions, a compression link coupled to the upper protrusion of the floating link with a pin, and one end side An upper contact compression plate link having the other end side coupled to the compression plate by a pin to a bearing plate arranged on both sides of the flexible conductor, and a lower end of the conductor plate with the other end approaching the conductor plate A lower contact compression plate link, one end of which is connected to the lower projecting portion of the floating link with a pin, and a longitudinal intermediate portion is connected to the bearing plate with a pin, and the compression link is connected to the floating link. It is composed of an actuator as a drive source that rotates around a fulcrum.
Preferred forms of this power supply device are listed below.
(1) The conductor plate, the power supply side terminal , and the load facility side conductor plate are provided with a cooling water circulation passage and forcedly cooled.
(2) The contact surface of the upper contact and the lower contact is the R surface.
(3) The upper and lower flexible conductors, the upper contact that is attached to the opposing surface on the other end of the pair of flexible conductors, and the lower contact that are each divided into a plurality in the width direction.
(4) raised from the previous SL unclamped point the compression link actuator above the point of attachment of the point of attachment compression links and an upper contact compression plate links of the compression link between floating link when rotated to the clamp point The load equipment side conductor plate is sandwiched between the upper and lower contacts.
(5) An actuator using an electric cylinder that pushes and pulls the compression link to rotate.

  In the present invention, the large current feeding device described above is installed on a carriage, the carriage is caused to travel along a track, and a large current is sequentially applied to terminal boards of a plurality of load facilities arranged at intervals along the track. A mobile power supply device configured to connect a power feeding device and energize each load facility for a predetermined time is also provided.

  Since the disconnector included in the large current feeding device of the present invention sandwiches the load facility side conductor plate from above and below by the upper contact and the lower contact, the load facility side conductor plate and the disconnector are in the longitudinal direction of the terminal plate in the energized state. The relative movement in the vertical direction is possible, and the displacement of the connection point due to the thermal expansion of the load equipment side conductor can be absorbed without using a cable.

  In addition, since the upper contact and the lower contact are supported by the floating link, and further, a pressing force is applied to these contacts, the holding pressure of the load equipment side conductor plate by the upper contact and the lower contact becomes equal, and the holding pressure Is constant. In addition, since the upper and lower contacts are attached to the flexible conductor, even if the load equipment side conductor plate is twisted or the parallelism of the upper and lower surfaces is deteriorated, the contact of the contacts is ensured. The electrical resistance is not changed at the contact portion, and the energized state is stabilized.

  Furthermore, since the disconnector is compact, the apparatus can be reduced in size as compared with a conventional apparatus in which a water-cooled cable is suspended.

In addition, those that perform forced cooling with the water-cooled structure of the conductor plate, the power supply side terminal , and the load facility side conductor plate may pass more current (for example, 4 to 5 times) than the self-cooling type. And further miniaturization of the apparatus can be achieved.

  Further, in the case where the contact surface of the upper contact and the lower contact is the R surface, the contact with the load equipment side conductor plate becomes a line contact, and the energized state becomes more stable.

  When a pair of flexible conductors and an upper contact and a lower contact attached to the flexible conductor are divided into a plurality of parts in the width direction, the followability of the contact with respect to the surface displacement is improved, and the contact of the contact is made more reliably.

  The clamp mechanism of the disconnector is preferably a push / pull actuator, in particular, an apparatus that performs clamping and unclamping using an electric cylinder that does not require piping as a drive source.

  1 to 8 show an embodiment of a disconnector included in the large current feeder of the present invention. The illustrated disconnector 20 includes a conductor plate 1, flexible conductors 2 and 3 which are fixed to one end of the conductor plate 1 and vertically opposed to each other, and the other end side (contact fixing side) of the flexible conductors 2 and 3. ) Are moved toward and away from each other, the upper contact 5 and the lower contact 6 attached to the opposing surfaces of the upper and lower flexible conductors 2 and 3, respectively, and the upper contact 5 and the lower contact 6 are pressed individually. The contact pressing spring 7 (see FIG. 4) and the load facility side conductor plate 8 connected to the load facility side terminal B are configured. In addition, the load equipment side conductor plate 8 is a terminal with a contact in which a contact is made at a portion where the upper contact 5 and the lower contact 6 come into contact.

  The conductor plate 1 is connected to the power supply side terminal A by tightening with a bolt and nut (not shown). The conductor plate 1, the power supply side terminal A, and the load facility side conductor plate 8 are provided with a cooling water circulation passage (not shown) in the interior, and forced cooling is performed by flowing the cooling water through the circulation passage. preferable.

  The flexible conductors 2 and 3 are divided into a plurality in the width direction. The upper contact 5 and the lower contact 6 are preferably the horizontally long rod-shaped contacts shown in FIG. 5 whose contact surfaces 5a and 6a are R surfaces as shown in FIG. 5, and more preferably the same as the flexible conductors 2 and 3, divided in the width direction. We adopt what we did.

The clamp mechanism 4 includes a floating link 9 provided with protrusions 9a and 9b on the load equipment side (right side in FIGS. 1 and 2) on the upper and lower parts, and a pin P ₁ on the upper protrusion 9a of the floating link 9. And the compression link 10 to be coupled with each other, one end side is coupled to the compression link 10 with a pin P ₂ , and the other end side is coupled to the bearing plate 11 disposed on both sides of the flexible conductors 2 and ₃ with a pin P ₃ . The upper contact compression plate link 12 to be moved, the other end is made close to the conductor plate 1 and arranged at the lower portion of the conductor plate 1, one end side is the lower projecting portion 9b of the floating link 9, and the longitudinal intermediate portion is the bearing plate 11. The lower contact compression plate link 13 to be coupled by the pins P ₄ and P ₅ and the tip of the output rod 14a are connected to the compression link 10 by the pin P ₆ and the compression link 10 is pushed and pulled to use the pin P ₁ as a fulcrum. It consists of an actuator 14 that rotates . FIG. 6 shows an exploded view of the link employed in the clamp mechanism 4. The actuator 14 has been illustrated unnecessary electric cylinder of pipe that swingably supported by a pin P ₇ as a fulcrum, but is not limited thereto.

  As shown in FIG. 5, a reaction force receiving pin 15 is provided upright on the upper contact compression plate link 12, and the reaction force receiving pin 15 is passed through the other end of the flexible conductor 2, and this reaction force receiving is received. A contact pressing spring 7 is interposed between the retainer 16 supported by the pin 15 and the flexible conductor 2, and the other end side of the flexible conductor 2 to which the upper contact 5 is fixed is pressed downward by the contact pressing spring 7. Yes.

  The same applies to the other end side of the flexible conductor 3. That is, a reaction force receiving pin 15 provided to hang from the lower contact compression plate link 13 is passed through the flexible conductor 3, and is interposed between the retainer 16 supported by the reaction force receiving pin 15 and the flexible conductor 3. The other end of the flexible conductor 3 to which the lower contact is fixed is pressed upward by the contact pressing spring 7.

Compression link 10 is formed into a substantially L-shape, in the substantially the same height position the pin P ₂ is the pin P ₁ is in a state retracted output rod 14a of the actuator 14 as shown in FIG. 7 the clamping device 4 is in an unclamped state.

  When the actuator 14 is operated, the clamp device 4 performs clamping, and the upper contact 5 and the lower contact 6 sandwich the load equipment side conductor plate 8. The operation at that time will be described in detail.

As shown in FIG. 7, the clamp mechanism 4 is unclamped, and the disconnecting switch 20 that has been opened is moved to the installation point of the load facility side conductor plate 8 to open the load facility side conductor plate 8. Get in. Next, when the state shown in FIG. 7 is reached, the actuator 14 is operated to push out the output rod 14a. By this extrusion, the compression link 10 rotates about the pin P ₁ as a fulcrum, the contact attachment end side of the flexible conductor 2 is pushed down, and the upper contact 5 hits the upper surface of the load equipment side conductor plate 8 as shown in FIG.

Further, when the output rod 14a is further pushed out, the connecting point by the pin P ₁ is rotated about the pin P ₂ as a fulcrum, and the free end of the lower contact compression plate link 13 is brought to the lower surface of the conductor plate 1 at this time. Since the floating link 9 and the lower contact compression plate link 13 are moved in the direction in which the connecting point by the pin P ₄ is lifted, the contact attachment end side of the flexible conductor 3 is pushed up and the lower contact 6 is moved. Is pressed against the lower surface of the load facility side conductor plate 8, and the load facility side conductor plate 8 is sandwiched between the upper contact 5 and the lower contact 6 as shown in FIG.

  At this time, the clamping pressure of the load equipment side conductor plate 8 by the upper contact 5 and the clamping pressure by the lower contact 6 are equal because the pressing reaction force applied to the contact pressing spring 7 is received by the floating link 9. In addition, the conductor plate 1 and the load facility side conductor plate 8 are heated by energization of the load facility, and therefore, the clamp mechanism 4 and the load facility side conductor plate 8 are elongated in the terminal plate longitudinal direction (in FIG. 1). When the position is relatively displaced in the left-right direction), the sandwiching point between the upper and lower contacts 5 and 6 slides on the load equipment side conductor plate 8 to absorb the displacement, and the contact state and contact pressure of the contact do not change.

  Further, since the contact surfaces of the upper and lower contacts 5 and 6 are R surfaces, a stable contact state and a contact pressure are maintained even when the position of the contact point is shifted in the vertical direction. , 6 and the load equipment side conductor plate 8 are always constant, and the stability of energization is ensured.

  When the output rod 14a of the actuator 14 is pulled back, the clamp mechanism 4 opens its mouth by an opposite mechanism to the above and enters an unclamped state, and the connecting portion is disconnected.

  FIG. 9 and FIG. 10 show an outline of a mobile power supply device 30 configured by providing a power feeding device having the disconnector 20 described above on a carriage.

  In the figure, reference numeral 31 denotes a carriage that runs on the rail 32. The carriage 31 has a self-propelled driving device and a braking device (not shown), and can be accurately positioned and stopped at a designated position.

  On this carriage 31, a transformer 34, a rectifier 35, a rectifier control board 36, a carriage control board 37, and a cooling device 38 that cools pure water and supplies it to the conductor, which are connected to the power line via a three-pole section switch 33. The disconnector 20 that characterizes the present invention is installed together with the above. The illustrated mobile power supply device 30 allocates two disconnectors 20 to the P and N poles of a load facility (graphitization furnace) C, and supplies power to one load facility C using the four disconnectors 20. Like that.

  Two load equipment side conductor plates 8 are attached to the P and N poles of each load equipment C, and the load equipment side conductor plates 8 having a total number of 4 per unit are clamped by the corresponding disconnector 20 and moved. Power is supplied from the power supply device 30 to the load facility C. When power is supplied for a predetermined time, the disconnecting device 20 is unclamped, the mobile power supply device 30 is disconnected from the supplied load facility C, the power supply device 30 is moved to the position of the next load facility, and power is supplied to the load facility.

  When this mobile power supply device 30 is installed, it is possible to automate the connection switching work that has been performed manually, and it is possible to greatly reduce the time and labor required for switching and increase the operating rate of the load equipment. Become.

Side view showing an example of a disconnector included in the power feeding device of the present invention Plan view of the disconnector of FIG. Front view of disconnector Sectional view showing the attachment part of the upper and lower contacts Diagram showing the pressing state of the upper and lower contacts Exploded perspective view of link used in disconnector clamp mechanism Side view showing the disconnector opened Side view showing the disconnector partially closed The side view which simplifies and shows an example of the mobile power supply device of this invention FIG. 9 is a simplified plan view of the mobile power supply device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conductor plate 2, 3 Flexible conductor 4 Clamp mechanism 5 Upper contact 6 Lower contact 7 Contact pressing spring 8 Load equipment side conductor plate 9 Floating link 9a Upper protrusion 9b Lower protrusion 10 Compression link 11 Bearing plate 12 Upper contact compression plate link 13 bottom contact compression plate link 14 actuator 15 reaction force receiving pin 16 retainer P ₁ to P ₆ pin A line terminal B load facility side terminal C load facility 30 mobile power supply 31 trolley 32 rail 33 three-pole section switch 34 transformer 35 Rectifier 36 Rectifier control panel 37 Dolly control panel 38 Cooling device

Claims (7)

In addition to the conductor plate (1) connected to the power supply side terminal (A) , the flexible conductors (2, 3) fixed to the conductor plate and vertically opposed to each other, the upper and lower flexible conductors (2, 3) A clamp mechanism (4) for moving the end sides closer to and away from each other, a horizontally long upper contact (5) and a lower contact (6) that are fixed to the opposite surfaces of the upper and lower flexible conductors (2, 3) , a load facility side conductor plate for connecting to the load equipment (C) (8), said upper contact (5), each contact pressing for pressing separately on upper and lower surfaces of the load facility side conductor plate bottom contact (6) (8) A disconnector (20) comprising a spring (7) ;
The clamp mechanism (4) includes a floating link (9) provided with an upper projecting portion (9a) and a lower projecting portion (9b) projecting toward the load facility (C) at the upper and lower portions, and the floating link (9). A compression link (10) coupled to the upper protrusion (9a) by the pin (P1), one end side to the compression link (10), and the other end side to both sides of the flexible conductor (2, 3) An upper contact compression plate link (12) to be coupled to the arranged bearing plate (11) by pins (P2, P3), respectively, and the lower end of the conductor plate (1) with the other end approaching the conductor plate (1) The lower contact compression plate link (13) having one end side coupled to the lower protrusion (9b) of the floating link by a pin (P4) and the longitudinal middle portion to the bearing plate (11) by a pin (P5). ) And the compression link (10) to the floating link (9). (P1) in the fulcrum is constructed out with the actuator (14) as a drive source for rotating the,
The floating link (9) is supported at two points by the pin (P1) of the upper protrusion and the pin (P4) of the lower protrusion,
The contact fixing part side end of the upper flexible conductor (2) is the upper contact compression plate link (12), and the contact fixing part side end of the lower flexible conductor (3) is the lower contact compression plate link. (13) is held so as to be vertically movable ,
Large current configured to supply power from the power source to the load equipment (C) by sandwiching the load equipment side conductor plate (8) between the upper contact (5) and the lower contact (6) of the disconnector (20). Power supply device. The conductor plate (1), a power supply terminal (A), and load equipment side conductor plate (8), according to claim 1 which is adapted to forcibly cool by providing it found inside the circulation path of the cooling water Large current power supply device. The large current feeder according to claim 1 or 2, wherein contact surfaces of the upper contact (5) and the lower contact (6) are R surfaces. The large current feeder according to any one of claims 1 to 3, wherein the upper and lower flexible conductors (2, 3) , the upper contact (5), and the lower contact (6) are each divided into a plurality in the width direction. The point of attachment by said pin (P1) of said compression links compression link (10) from the unclamped point when rotated in the clamping point (10) and said floating link (9) is the in the actuator (14) compression link (10) and said upper contact compression plate link (12) load facility side conductor plate by said pin (P2) in accordance the lifted above the point of attachment top contact (5) and a lower contact (6) of ( The large current power feeding device according to any one of claims 1 to 4, wherein the pinching of 8) is performed. The high-current power feeding device according to claim 1 , wherein an electric cylinder that pushes and pulls the compression link (10) to rotate is used as the actuator (14) . A large current feeding device according to any one of claims 1 to 6 is installed on a bogie (31), the bogie (31) is run along a track, and a plurality of them are arranged at intervals along the track. A mobile power supply facility configured to connect a large-current power supply device in order to terminals of the load facility (C) and to energize each load facility (C) for a predetermined time.

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