JP2013105563A - Direct-current receptacle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a direct-current receptacle that enables arc-extinguishing of a number of circuits, prevention of increase in product size, and blocking of accident currents.SOLUTION: A plurality of circuits 4a to 4g each have a first circuit 5 and a second circuit 7 that enable current separation. A switching mechanism 6 is arranged in the first circuit 5, and a switching mechanism 8 is arranged in the second circuit 7. The second circuit 7 is connected to an arc-extinguishing circuit 13 common to the circuits 4a to 4g at the upstream side of the second circuit 7. The arc-extinguishing circuit 13 is connected to a circuit-breaker 14. The switching mechanisms 6 and 8 are usually in an ON state and an OFF state, respectively. In a process where a plug is to be drawn from the direct-current receptacle or be rotated, the switching mechanism 8 and the circuit-breaker 14 are sequentially turned on, and then the switching mechanism 6 are turned off. Thereafter, the circuit-breaker 14 is turned off and then the switching mechanism 8 is turned off.

Description

  The present invention relates to a DC outlet having a large number of circuits, and more particularly to a DC outlet having an arc-extinguishing circuit that extinguishes an arc generated when a plug is removed during energization.

  In recent years, in consideration of the situation where a power transmission system that supplies DC power is adopted as a next-generation power grid (smart grid), even in electrical equipment that is used by plugging into an outlet installed in a house or building. However, there is a current situation that electric devices corresponding to DC power sources have been developed and commercialized.

  However, when a DC outlet is used as an outlet installed in a house or a building, it is known that the existing DC outlet causes deterioration of the contact of the DC outlet due to an arc generated when the plug is removed during energization. On the other hand, a DC outlet provided with an arc extinguishing unit has already been developed as an arc countermeasure, for example, as shown in Patent Document 1. In this patent document 1, the structure provided with the high resistance parallel circuit which connects between the connection parts of an outlet is shown as an arc-extinguishing part at the time of disconnection | disconnection of the connection part of an outlet, and the contact of a plug.

  In addition, there is an outlet device having a multi-circuit so that a plurality of plugs can be inserted into the outlet as shown in FIGS. 1 and 2 of Patent Document 2, for example. It is conceivable to use an outlet.

JP 2009-146782 A JP 2011-9046 A

  However, for example, when a DC outlet as shown in Patent Document 1 is a multi-circuit type as shown in Patent Document 2, for example, as shown in Patent Document 1, between outlet connection parts as an arc extinguishing part, That is, if a high resistance parallel circuit is provided for each of a large number of circuits, the product size of the DC outlet is relatively increased. In addition, when a high-resistance parallel circuit is provided as disclosed in Patent Document 1, there is also a problem that it is impossible to cut off the accident current.

  Therefore, the present invention prevents the relative increase in product dimensions while enabling arc extinguishing in all circuits even if it has a large number of circuits, and also prevents the fault current from being interrupted. The purpose is to provide a possible DC outlet.

  The direct current outlet according to the present invention is a direct current outlet having a plurality of circuits so as to individually flow to a plurality of loads through a plug into which a current from a direct current power source is inserted, and the circuit shunts the current. A first circuit and a second circuit that can be operated, and a first opening / closing mechanism for opening and closing the first circuit is disposed in the first circuit, and the second circuit Has a second opening / closing mechanism for opening and closing the second circuit, and the upstream side of the second circuit is connected to one arc-extinguishing circuit common to the plurality of circuits, The arc extinguishing circuit is provided with a circuit breaker for opening and closing the arc extinguishing circuit. When the plug is inserted, the first opening / closing mechanism is in the on state, and the second opening / closing mechanism is in the off state. In the process of pulling out or rotating the plug The second switching mechanism and the circuit breaker are sequentially turned on, then the first switching mechanism is turned off, and after the circuit breaker is turned off, the second switching mechanism is turned off. (Claim 1). Here, it is desirable that the number of circuit breakers arranged in the arc extinguishing circuit is also one. In addition, each open / close mechanism may have a simple configuration that does not have a relatively high blocking ability. On the other hand, a circuit breaker having a relatively high breaking ability is used. In the process of pulling out or rotating the plug from the state in which the first opening / closing mechanism is in the on state and the second opening / closing mechanism in the off state, the second opening / closing mechanism and the circuit breaker are sequentially turned on, and then the first The process of turning the second open / close mechanism off after the open / close mechanism is turned off and the circuit breaker is turned off manually, such as manually operating the push button, even if it is performed mechanically You can go. Further, the circuit of the present invention can be used in a DC distribution board as well as a DC outlet.

  More specifically, the circuit connects the first circuit to a first bus connected at one end to the DC power source, and the second circuit has a current on the same pole side as the first bus. A load-side circuit that is connected to a flowing second bus, and that the first circuit and the second circuit are aggregated downstream of the switching mechanism and connected to one of the plurality of loads. (Claim 2).

  In the circuit, one end of the first circuit is connected to the DC power source, and the first opening / closing mechanism is disposed at the other end, and the first opening / closing mechanism is in contact with and separated from the plug. To open and close the first circuit, connect one end of the second circuit to one of a plurality of branch lines extending from the arc-extinguishing circuit, and connect the second opening and closing mechanism to the other end. And the second opening / closing mechanism contacts and separates from the plug, and the circuit breaker opens / closes to open / close the second circuit. Item 3). Here, the circuit breaker may open and close the second circuit by ON / OFF control of power supply to the electromagnetic coil.

  Thus, when the plug is completely removed from the DC outlet, the first opening / closing mechanism and the second opening / closing mechanism are at least cut off, so that both the first circuit and the second circuit constituting the circuit are provided. Is opened, and no current flows from the DC outlet to the plug, so no arc is generated and the contact of the DC outlet is not deteriorated.

  Even if there are many circuits in the DC outlet, the number of arc-extinguishing circuits in which the circuit breakers are arranged is one, and the first and second opening / closing mechanisms arranged in each circuit are also relatively capable of breaking off. Since the thing of the simple structure which is not high can be used, it is suppressed that the product dimension of a DC outlet becomes large.

  Further, in the DC outlet according to the present invention, a detection mechanism for detecting an accident occurring in the load side circuit is arranged in the load side circuit, and the plug is inserted in response to a signal from the detection mechanism. Even in the state, first, the second switching mechanism and the circuit breaker are sequentially turned on, then the first switching mechanism is turned off, and after the circuit breaker is turned off, the second switching mechanism is (Claim 4). As the detection mechanism, for example, a current transformer called CT (Current Transformer) is used.

  As a result, when an electrical accident such as a ground fault or short circuit occurs in the load side circuit, the detection mechanism detects this accident, sends this detection signal to the control unit, and receives the detection signal. As in the process of pulling out or rotating the plug even when the plug is inserted, an instruction signal is issued to each control mechanism of each switching mechanism and circuit breaker so as to shut off the load side circuit where the accident occurred. The second switching mechanism and the circuit breaker were sequentially turned on, then the first switching mechanism was turned off, and after the circuit breaker was turned off, the second switching mechanism was turned off and an accident occurred. The load side circuit is shut off.

  As described above, according to the first to fourth aspects of the present invention, when the plug is completely removed from the DC outlet by pulling out or rotating the plug, the first opening / closing mechanism, the second At least the first and second circuits constituting the circuit are opened, and no current flows from the DC outlet to the plug, so the plug is removed during energization. Therefore, it is possible to prevent the occurrence of an arc that has occurred for this reason, and therefore it is possible to prevent the arc contact from deteriorating due to the arc.

  Moreover, according to invention of Claim 1-Claim 4, the number of the arc-extinguishing circuits by which the circuit breaker is arrange | positioned can be integrated into one, and the 1st opening-closing mechanism and the 2nd opening-closing mechanism of Since the configuration can be simplified, the product dimensions of the DC outlet can be made compact.

  In particular, according to the invention described in claim 4, when an accident such as a ground fault or a short circuit occurs in the load side circuit, the detection mechanism detects this accident and sends this detection signal to the control unit. An instruction signal is issued to each control unit of the first and second switching mechanisms and the circuit breaker so as to shut off the load side circuit where the accident occurred from the control unit that received the signal, and the plug is pulled out or rotated. In the same manner as in the process, the second switching mechanism and the circuit breaker are sequentially turned on, then the first switching mechanism is turned off, and after the circuit breaker is turned off, the second switching mechanism is turned off. Therefore, it is possible to shut off the load side circuit where the accident occurred.

FIG. 1 is an explanatory diagram showing an outline of a DC outlet according to the present invention. FIG. 2 is a flowchart showing the transition of each step in the arc extinguishing method in the DC outlet. FIG. 3 shows a circuit for one load in the DC outlet shown in FIG. 1. In this circuit, in the normal state, the first switching mechanism is turned on, the second switching mechanism is turned off, and the circuit breaker is turned off. It is explanatory drawing corresponding to the 2nd step from the top of FIG. 2 while showing the flow of the electric power supply in this state. FIG. 4 shows a flow of power supply in a state where the circuit to one load is extracted from the DC outlet shown in FIG. 1, the second switching mechanism is inserted, and the circuit breaker is closed. It is explanatory drawing corresponding to the 3rd and 4th step from the top. 5 shows a flow of power supply in a state where the circuit to one load is extracted from the DC outlet shown in FIG. 1 and the first opening / closing mechanism is turned off in this circuit, and the fifth from the top in FIG. It is explanatory drawing corresponding to the 6th step. FIG. 6 is an explanatory diagram corresponding to the seventh step from the top of FIG. 2, in which the circuit to one load is extracted from the DC outlet shown in FIG. 1 and the circuit breaker is turned off in this circuit. is there. FIG. 7 shows a state in which the circuit to one load is extracted from the DC outlet shown in FIG. 1, the first switching mechanism is turned off, the second switching mechanism is turned off, and the circuit breaker is opened. FIG. 9 is an explanatory diagram corresponding to the eighth step from the top in FIG. 2. FIG. 8 is an explanatory diagram showing a configuration in which a detection mechanism for detecting an accident current is arranged in the load side circuit of the circuit with respect to the DC outlet shown in FIG. FIG. 9 illustrates the first embodiment that more specifically shows the configuration of the first switching mechanism, the second switching mechanism, and the circuit breaker in the DC outlet of the present invention. It is explanatory drawing which showed the flow of the electric power supply in the state in which the mechanism was turned on, the second switching mechanism was turned off, and the circuit breaker was turned off. FIG. 10 is an explanatory diagram showing the flow of power supply in a state in which the circuit breaker is inserted and the second opening / closing mechanism is inserted in the configuration of the first embodiment. FIG. 11 is an explanatory diagram showing a flow of power supply in a state where the first opening / closing mechanism is turned off in the configuration of the first embodiment. FIG. 12 is an explanatory view showing a state in which the circuit breaker is cut in the configuration of the first embodiment. FIG. 13 is an explanatory view showing a state in which the second opening / closing mechanism is turned off in the configuration of the first embodiment. In the case of the rotary type described above, a protrusion is provided on the plug electrode and a groove that is pulled out at the rightmost position on the opening side so that the plug cannot be pulled out until the right rotation operation at the time of extraction is completed. A structure is needed. FIG. 14 illustrates a second embodiment that more specifically shows the configuration of the first switching mechanism, the second switching mechanism, and the circuit breaker in the DC outlet according to the present invention. It is explanatory drawing which showed the flow of the electric power supply in the state in which the mechanism was turned on, the second switching mechanism was turned off, and the circuit breaker was turned off. FIG. 15 is an explanatory diagram showing the flow of power supply in a state where the breaker is inserted and the second opening / closing mechanism is inserted in the configuration of the second embodiment. FIG. 16 is an explanatory diagram showing a flow of power supply in a state where the first opening / closing mechanism is turned off in the configuration of the second embodiment. FIG. 17 is an explanatory view showing a state in which the circuit breaker is cut off in the configuration of the second embodiment. FIG. 18 is an explanatory view showing a state in which the second opening / closing mechanism is turned off in the configuration of the second embodiment. FIG. 19 illustrates a third embodiment that more specifically shows the configuration of the first opening / closing mechanism, the second opening / closing mechanism, and the circuit breaker in the DC outlet according to the present invention. It is explanatory drawing which showed the flow of the electric power supply in the state in which the mechanism entered and the circuit breaker connected to the second switching mechanism was turned off. FIG. 20 is an explanatory diagram showing the flow of power supply in a state where the second switching mechanism is inserted and the circuit breaker is inserted in the configuration of the third embodiment. FIG. 21 is an explanatory diagram showing a flow of power supply in a state where the first opening / closing mechanism is turned off in the configuration of the third embodiment. FIG. 22 is an explanatory view showing a state in which the circuit breaker is cut in the configuration of the third embodiment. FIG. 23 is an explanatory diagram showing a state in which the second opening / closing mechanism is turned off in the configuration of the third embodiment. In the case of the above mechanism, as a safety measure, a mechanism is provided for locking so that other plugs cannot be removed while the plug is pulled out.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a schematic configuration of an integrated circuit as an example of an integrated circuit 1 of a DC outlet according to the present invention. Although the overall circuit 1 of the DC outlet is shown as being connected to the negative electrode side 2 of the DC power supply in this embodiment, it is not necessarily limited to this, but not shown, but connected to the positive electrode side of the DC power supply. It may be.

  The DC outlet integrated circuit 1 includes a plurality (seven in this embodiment) of plug insertion circuits 4a to 4g, and each of the plug insertion circuits 4a to 4g includes a first opening / closing mechanism 6. Circuit 5 and a second circuit 7 having an opening / closing mechanism 8. The open / close mechanisms 6 and 8 are, for example, DC switches having a relatively low blocking capability. In the case of rated DC 400V and open / close 4A, the sizes of the open / close mechanisms 6 and 8 are, for example, 42 mm long, 24 mm wide, and high. 46 mm (excluding the height of the manual lever) can be accommodated, for example, compared to the case of using a DC circuit breaker (also referred to as NFB “no-fuse breaker”, the same shall apply hereinafter). However, it can be significantly reduced. One end of the first circuit 5 is connected to the bus 10 and connected to the negative side 2 of the DC power supply, and one end of the second circuit 7 is connected to the bus 11 and can be connected to the negative side 2 of the DC power supply. It has become. The first circuit 5 and the second circuit 7 are plugs that are aggregated between the opening / closing mechanism 6 and the opening / closing mechanism 8 (on the downstream side of the circuits 5, 7 from the opening / closing mechanisms 6, 8). And a load side circuit 9 for connecting to the loads F1 to F7.

  Further, the DC outlet integrated circuit 1 has one arc extinguishing circuit 13. The arc-extinguishing circuit 13 is connected to the negative electrode side 2 of the DC power source at one end and connected to the negative electrode side 2 of the DC power source, and connected to the negative electrode side 2 of the DC power source, separately from the plug insertion circuits 4a to 4g. Connection with side 2 is possible. That is, the arc extinguishing circuit 13 is connected to the second circuit 7 of the plug insertion circuits 4 a to 4 g through the bus 11. The arc extinguishing circuit 13 is provided with one circuit breaker 14. For example, the DC circuit breaker described above is used as the circuit breaker 14. As an example of the dimensions, if the rated DC is 350 V, the energizing current is 50 A, and the breaking current is 10 kA, the length is 155 mm, the width is 120 mm and the height is 70 mm. (However, the height of the manual lever is excluded.)

  Next, regarding the arc extinguishing method using the DC outlet integrated circuit 1, the plug insertion circuit 4 a for supplying current to the load F 1 shown in the flowchart of FIG. 2 and FIGS. 3 to 7 and the arc extinguishing This will be described below with reference to the drawing of the circuit 13.

  In the normal state where power is supplied from the DC power source to the load F1 through the plug inserted into the DC outlet, as shown in FIG. 3, the switching mechanism 6 is turned on, the switching mechanism 8 is turned off, and the circuit breaker 14 is turned off. Thus, as indicated by step 101 in FIG. 2 and the arrow in FIG. 3, the current from the DC power source is arranged in the first circuit 5 and the first circuit 5 from the bus 10. It flows to the load side circuit 9 via the opening / closing mechanism 6 and further reaches the load F1.

  On the other hand, in the process of pulling out the plug from the DC outlet or rotating the plug, the following steps are switched.

  First, as shown in step 102 of FIG. 2 and FIG. 4, the switching mechanism 8 and the circuit breaker 14 are turned on in this order while the switching mechanism 6 is kept on. Thereby, as indicated by step 103 in FIG. 2 and the arrow in FIG. 4, the first circuit 5 and the opening / closing mechanism disposed in the first circuit 5 from the bus 10 as one route of the current from the DC power supply. 6 flows to the load side circuit 9 via 6 and reaches the load F 1, and as the other route of the current from the DC power supply, from the bus 10 through the arc extinguishing circuit 13 and the circuit breaker 14 arranged in the arc extinguishing circuit 13. After flowing through the bus 11, it flows to the load side circuit 9 via the second circuit 7 and the opening / closing mechanism 8 disposed in the second circuit 7 and reaches the load F <b> 1.

  Next, as shown in step 104 of FIG. 2 and FIG. 5, the switching mechanism 6 is turned off while the switching mechanism 8 is turned on and the circuit breaker 14 is turned on. As a result, as indicated by step 105 in FIG. 2 and the arrow in FIG. 5, the current from the DC power source is sent from the bus 10 through the arc extinguishing circuit 13 and the circuit breaker 14 arranged in the arc extinguishing circuit 13. After flowing through the second circuit 7 and the opening / closing mechanism 8 disposed in the second circuit 7, it flows to the load side circuit 9 and reaches the load F1.

  Further, as shown in step 106 of FIG. 2 and FIG. 6, the circuit breaker 14 is turned off while the switching mechanism 6 is turned off and the switching mechanism 8 is kept on. As a result, as shown in FIG. 6, both the first circuits 5 and 7 and the load side circuit 9 connected thereto are in an open state, so that the current from the DC power supply passes through the plug to the load F1. It will not lead to.

  Then, as described above, it is confirmed that the current does not flow to the load side circuit 9, and as shown in step 107 of FIG. 2 and FIG. The opening / closing mechanism 8 is turned off while maintaining the turning off.

  According to the arc-extinguishing method shown above, even if it is a DC outlet, the load side circuit 9 of the plug insertion circuit 4a can be in a state where the current is cut off. Even if the plug is removed, it is not energized, so it is possible to prevent arcing.

  Then, as shown in FIG. 8, the DC outlet integrated circuit 1 has an excessive power / abnormal power when an accident such as a ground fault or a short circuit occurs in the load side circuit 9 of each plug insertion circuit 4a to 4g. As a detection mechanism, for example, a current transformer 15 such as CT is arranged in the load side circuit 9 of each plug insertion circuit 4a to 4g, and the current from the current transformer 15 is A control unit that receives the detection signal and sends an instruction signal to the control units 16, 17, 18 that move the switching mechanisms 6, 8 and the circuit breaker 14 so as to cut off the supply of power to the load-side circuit 9 where the accident has occurred. 19 may be provided.

  As a result, even when the plug is plugged into the DC outlet, the control similar to the step in the process of rotating the plug as shown in FIG. 2 is automatically performed by a signal from the control unit. Therefore, the plug insertion circuit 4a having the load side circuit 9 where the accident has occurred can be in a state where the current is cut off, and the DC outlet can be damaged due to excessive power / abnormal power flowing. It becomes possible to prevent.

  Next, specific configurations for turning the opening / closing mechanism 6, the opening / closing mechanism 8, and the circuit breaker 14 on and off will be described as Example 1, Example 2, and Example 3.

  9 to 13 show the first embodiment of the present invention. As shown in FIGS. 9A to 13A, the plug 21 used in the first embodiment includes a plug body 24 having two cylindrical terminals 22 and 23 and a cord 25. And is connected to a load F (F1 is shown for convenience in the figure).

  As shown in FIGS. 9 (a) to 13 (a), the direct current outlet has two disk-like members 27 and 28 in the first embodiment, and these disk-like members 27 and 28 are They are combined so as to overlap along the axial direction of the terminals 22 and 23 of the plug 21.

  The disk-shaped member 27 is not rotated, and has two insertion holes 29 and 30 formed on the same circular orbit drawn around the center P1 of the disk-shaped member 27. The opening edges on the plug 21 side of the insertion holes 29 and 30 are provided with substantially U-shaped electrodes 31 and 32 extending from one end of the insertion holes 29 and 30 to the middle thereof. , 32 can be brought into contact with the terminals 22, 23 when the terminals 22, 23 of the plug 21 are in contact with the insertion holes 29, 30, and the electrodes 31, 32 and the terminals 22, 22 are in contact with each other. Alternatively, the separation functions as turning on and off of the opening / closing mechanism 6.

  The disk-shaped member 28 is rotated by a rotational force transmitted from the outside to a rotating shaft 33 provided at the center P2 of the disk-shaped member 27, and in the first embodiment, the plug 21 is rotated. Two raised portions 34 and 35 formed on different circular orbits drawn with the center P2 of the disk-shaped member 28 as the center are formed on the opposite surface. The bulging portion 34 and the bulging portion 35 have a bulging start point at the bulging portion 34 earlier than the bulging portion 35, and a bulging end point at the bulging portion 34 later than the bulging portion 35. That is, the dimension of the raised portion 34 is longer than that of the raised portion 35 along the arc trajectory.

  Further, the DC outlet has movable parts 36 and 37 in addition to the disk-like members 27 and 28. The movable portions 36 and 37 are not moved when viewed from the axial direction of the disk-shaped member 28, and have protrusions 36a and 37a protruding toward the disk-shaped member 28 and are disk-shaped. Since the protrusions 36a and 37a are always urged toward the member 28, the tips of the protrusions 36a and 37a are not located on the raised portions 34 and 35 of the disk-like member 28. At the position on the 28 side and overlapping with the raised portions 34, 35, it is pushed by the raised portions 34, 35 so as to move away from the disk-shaped member 28. The contact points 38 are disposed on a flow line that moves in a direction away from the disk-shaped member 28 of the movable part 36. When the contact points 38, 38 and the movable parts 36, 37 are in contact with or separated from each other, the opening / closing mechanism 8, The circuit breaker 14 is turned on and off.

  In a normal state in which the plug 21 is inserted and power is supplied from the DC power source to the load F1 through the plug 21, the terminals 22 and 23 of the plug 21 are connected to the electrodes 31 and 32 as shown in FIG. The movable parts 36 and 37 are not in contact with the contact points 38 and 38 because both the movable parts 36 and 37 do not overlap with the raised parts 34 and 35 and are not pushed away from the disk-shaped member 28. That is, the opening / closing mechanism 6 is turned on, the opening / closing mechanism 8 is turned off, and the circuit breaker 14 is turned off. Therefore, as shown in FIG. 9B, as in FIG. 3, the current from the DC power source passes through the first circuit 5 and the opening / closing mechanism 6 disposed in the first circuit 5 from the bus 10. Then, it flows to the load side circuit 9 and further reaches the load F1.

  On the other hand, when the plug 21 is rotated with respect to the disk-like member 27 in the direction of the arrow in FIG. 10A to FIG. 13A, the following steps are mechanically switched.

  First, when the plug 21 is rotated so that the terminals 22 and 23 of the plug 21 move from the position of FIG. 9A to the position of FIG. 10A, as shown in FIG. Since the disk-shaped member 27 does not move and the disk-shaped member 28 rotates accompanyingly, the terminals 22 and 23 of the plug 21 remain in contact with the electrodes 31 and 32, and both the movable parts 36 and 37 are The raised portions 34, 35 are overlapped with the raised portions 34, 35 and are pushed in a direction away from the disk-shaped member 28, and come into contact with the contacts 38, 38. That is, the opening / closing mechanism 6 is turned on, the opening / closing mechanism 8 is turned on, and the circuit breaker 14 is turned on. Therefore, as shown in FIG. 10 (b), as in FIG. 4, the first circuit 5 and the opening / closing mechanism disposed in the first circuit 5 from the bus 10 as one route of the current from the DC power source. 6 flows to the load side circuit 9 via 6 and reaches the load F 1, and as the other route of the current from the DC power supply, from the bus 10 through the arc extinguishing circuit 13 and the circuit breaker 14 arranged in the arc extinguishing circuit 13. After flowing through the bus 11, it flows to the load side circuit 9 via the second circuit 7 and the opening / closing mechanism 8 disposed in the second circuit 7 and reaches the load F <b> 1.

  Next, when the plug 21 is rotated so that the terminals 22 and 23 of the plug 21 move from the position shown in FIG. 10A to the position shown in FIG. 11A, as shown in FIG. Since the disk-shaped member 27 does not move and the disk-shaped member 28 rotates accompanyingly, the terminals 22 and 23 of the plug 21 are separated from the electrodes 31 and 32, while both the movable parts 36 and 37 are raised parts. 34 and 35 are pushed in a direction away from the disk-shaped member 28 and maintained in contact with the contacts 38 and 38. That is, the opening / closing mechanism 6 is turned off, the opening / closing mechanism 8 is turned on, and the circuit breaker 14 is turned on. Therefore, as shown in FIG. 11B, similarly to FIG. 5, the current from the DC power source is sent from the bus 10 to the bus 11 via the arc-extinguishing circuit 13 and the circuit breaker 14 arranged in the arc-extinguishing circuit 13. After flowing through the second circuit 7 and the opening / closing mechanism 8 disposed in the second circuit 7, it flows to the load side circuit 9 and reaches the load F1.

  Further, when the plug 21 is rotated so that the terminals 22 and 23 of the plug 21 are moved from the position of FIG. 11A to the position of FIG. 12A, as shown in FIG. Since the disk-shaped member 27 does not move and the disk-shaped member 28 rotates accompanyingly, the terminals 22 and 23 of the plug 21 are separated from the electrodes 31 and 32, and the movable part 36 overlaps the raised part 34. The movable portion 37 does not overlap with the raised portion 35 while being pushed away in the direction away from the shaped member 28, and the protrusion 37 a is separated from the disk-like member 28 at the raised portion 35. Since it is no longer pushed in the direction, it moves to the disk-like member 28 side by the urging force against the movable portion 37 and moves away from the contacts 38, 38. That is, the opening / closing mechanism 6 is turned off, the opening / closing mechanism 8 is turned on, and the circuit breaker 14 is turned off. Therefore, as shown in FIG. 12B, as in FIG. 6, the current from the DC power supply does not flow in either the first circuit 5 or the second circuit 7, and therefore the current is also supplied to the load side circuit 9. No longer flows.

  When the plug 21 is rotated so that the terminals 22 and 23 of the plug 21 move from the position of FIG. 12A to the position of FIG. 13A, that is, the end of the insertion holes 29 and 30, 13 (a), the disk-shaped member 27 does not move and the disk-shaped member 28 rotates accompanyingly, so that the terminals 22 and 23 of the plug 21 are separated from the electrodes 31 and 32, and the movable part. While 37 does not overlap with the raised portion 35 and maintains a state away from the contacts 38, 38, the movable portion 36 also does not overlap with the raised portion 34, and the protrusion 36 a is separated from the disk-shaped member 28 at the raised portion 34. Since it is not pushed, it moves to the disk-like member 28 side by the urging force against the movable part 36 and moves away from the contact points 38, 38. That is, the opening / closing mechanism 6 is turned off, the opening / closing mechanism 8 is turned off, and the circuit breaker 14 is turned off. Therefore, as shown in FIG. 13B, as in FIG. 7, the current from the DC power source does not flow into either the first circuit 5 or the second circuit 7, and therefore also to the load side circuit 9. The opening / closing mechanism 8 can be turned off in a manner in which a state in which no current flows is maintained.

  According to the above, even if the plug 21 inserted in the DC outlet shown in FIG. 9 is rotated and removed in the state shown in FIG. 13, the load side circuit 9 of the plug insertion circuit 4a is interrupted at that time. Since the plug 21 is not energized, it is possible to prevent arcing.

  14 to 18 show a second embodiment of the present invention. As shown in FIGS. 14A to 18A, the plug 21 used in the second embodiment includes a plug body 24 having two thin rectangular plate-like terminals 22 and 23. In addition, it is connected to a load F (F1 is shown for convenience in the figure) via a cord 25. The DC outlet has electrodes 31 and 32 that contact the terminals 22 and 23 by inserting the terminals 22 and 23 of the plug 21. The contact or separation between the electrodes 31 and 32 and the terminals 22 and 22 functions as turning on and off of the opening / closing mechanism 6.

  Further, the plug 21 has an operation rod 40 extending in the same direction as the extending direction of the terminals 22 and 23 from between the terminals 22 and 23 of the plug main body 24 in the second embodiment, and DC. The outlet has movable parts 37 and 38 arranged so as to be between the operation rod 40 and the terminals 22 and 23.

  The operation rod 40 has a raised portion 34 raised on the movable portion 36 side (terminal 23 side) and a raised portion 35 raised on the movable portion 37 side (terminal 22 side). The raised portions 34 and 35 are the operation rod 40. And the bulge start point of the bulge portion 34 on the end end side of the operation rod 40 is earlier than the bulge start point of the bulge portion 35 of the bulge portion 35 on the plug body 24 side of the operation rod 40. The bulge end point of the bulge portion 34 is later than the bulge end point of the bulge portion 35 of the bulge portion 35. That is, the dimension of the raised portion 34 along the axial direction of the operation rod 40 is longer than that of the raised portion 35.

  The movable portions 37 and 38 are constantly urged toward the operation rod 40 and have projections 37a and 38a protruding toward the operation rod 40. The tips of the projections 36a and 37a are on the side relatively close to the operation rod 40 in a position that does not overlap with the protrusions 34 and 35 of the operation rod 40, and the protrusions 34 and 35 in a position that overlaps the protrusions 34 and 35. Is moved to the terminal 22 or 23 side. The contact points 38 and 38 are arranged on the flow line that moves to the terminal 22 or 23 side of the movable part 36, and the contact point 38 and 38 and the movable part 36 and 37 come into contact with or separate from each other. 14 turns on and off respectively.

  In a normal state in which the plug 21 is inserted and power is supplied from the DC power source to the load F1 through the plug 21, the terminals 22, 23 of the plug 21 are connected to the electrodes 31, 32, as shown in FIG. In contact with each other, both the movable parts 36 and 37 do not overlap the raised parts 34 and 35 and are not pushed to the terminal 22 or 23 side, and thus are not in contact with the contact points 38 and 38. That is, the opening / closing mechanism 6 is turned on, the opening / closing mechanism 8 is turned off, and the circuit breaker 14 is turned off. Therefore, as shown in FIG. 14B, as in FIG. 3, the current from the DC power supply passes through the first circuit 5 and the opening / closing mechanism 6 disposed in the first circuit 5 from the bus 10. Then, it flows to the load side circuit 9 and further reaches the load F1.

  On the other hand, when the plug 21 is pulled out from the DC outlet as shown in the direction of the arrow in FIGS. 15A to 18A, the following steps are mechanically switched.

  First, when the plug 21 is pulled out in the direction of the arrow so that the terminals 22 and 23 of the plug 21 move from the position of FIG. 14A to the position of FIG. 15A, as shown in FIG. In addition, the terminals 22 and 23 of the plug 21 remain in contact with the electrodes 31 and 32, and both the movable portions 36 and 37 overlap the raised portions 34 and 35 and are pushed toward the terminals 22 or 23 to contact the contacts 38 and 38. Abut. That is, the opening / closing mechanism 6 is turned on, the opening / closing mechanism 8 is turned on, and the circuit breaker 14 is turned on. Therefore, as shown in FIG. 15 (b), as in FIG. 4, the first circuit 5 and the opening / closing mechanism arranged in the first circuit 5 from the bus 10 as one route of the current from the DC power supply. 6 flows to the load side circuit 9 via 6 and reaches the load F 1, and as the other route of the current from the DC power supply, from the bus 10 through the arc extinguishing circuit 13 and the circuit breaker 14 arranged in the arc extinguishing circuit 13. After flowing through the bus 11, it flows to the load side circuit 9 via the second circuit 7 and the opening / closing mechanism 8 disposed in the second circuit 7 and reaches the load F <b> 1.

  Next, when the plug 21 is pulled out in the direction of the arrow so that the terminals 22 and 23 of the plug 21 move from the position of FIG. 15A to the position of FIG. Thus, while the terminals 22 and 23 of the plug 21 are separated from the electrodes 31 and 32, both the movable parts 36 and 37 overlap with the raised parts 34 and 35 and are pushed toward the terminals 22 or 23 so as to contact the contacts 38 and 38. Maintain contact. That is, the opening / closing mechanism 6 is turned off, the opening / closing mechanism 8 is turned on, and the circuit breaker 14 is turned on. Therefore, as shown in FIG. 16B, similarly to FIG. 5, the current from the DC power source is supplied from the bus 10 to the bus 11 via the arc-extinguishing circuit 13 and the circuit breaker 14 arranged in the arc-extinguishing circuit 13. After flowing through the second circuit 7 and the opening / closing mechanism 8 disposed in the second circuit 7, it flows to the load side circuit 9 and reaches the load F1.

  Further, when the plug 21 is pulled out in the direction of the arrow so that the terminals 22 and 23 of the plug 21 move from the position of FIG. 16A to the position of FIG. 17A, as shown in FIG. In addition, the terminals 22 and 23 of the plug 21 are separated from the electrodes 31 and 32, while the movable portion 36 overlaps with the raised portion 34 and is pushed to the terminal 23 side while maintaining the contact state with the contacts 38 and 38, Since the movable portion 37 does not overlap the raised portion 35 and the protrusion 37 a is not pushed toward the terminal 22 by the raised portion 35, the movable portion 37 moves to the terminal 23 side due to the urging force against the movable portion 37 and moves away from the contacts 38 and 38. That is, the opening / closing mechanism 6 is turned off, the opening / closing mechanism 8 is turned on, and the circuit breaker 14 is turned off. Therefore, as shown in FIG. 17B, as in FIG. 6, the current from the DC power supply does not flow in either of the first circuits 5 and 7, and therefore no current flows in the load side circuit 9 as well.

  Then, when the plug 21 is pulled out in the direction of the arrow so that the terminals 22 and 23 of the plug 21 move from the position of FIG. 17A to the position of FIG. 18A, as shown in FIG. In addition, since the terminals 22 and 23 of the plug 21 are separated from the electrodes 31 and 32 and the movable portion 37 does not overlap with the raised portion 35, the movable portion 36 is also separated from the contacts 38 and 38. Since the protrusion 36 a is not pushed to the terminal 23 side by the raised portion 34 because it does not overlap with the protrusion 34, it moves to the terminal 22 side by the urging force against the movable portion 36, and moves away from the contacts 38, 38. That is, the opening / closing mechanism 6 is turned off, the opening / closing mechanism 8 is turned off, and the circuit breaker 14 is turned off. Therefore, as shown in FIG. 18B, as in FIG. 7, the current from the DC power supply does not flow to either the first circuit 5 or the second circuit 7, and therefore also to the load side circuit 9. The opening / closing mechanism 8 can be turned off in a manner in which a state in which no current flows is maintained.

  According to the above, when the plug 21 inserted into the DC outlet shown in FIG. 14 is further pulled out from the state shown in FIG. 18 and the plug 21 is completely removed, the load side circuit 9 of the plug insertion circuit 4a receives a current. Since the plug 21 is cut off and the plug 21 is not energized, it is possible to prevent arcing.

  A third embodiment of the present invention is shown in FIGS. As shown in FIGS. 19 (a) to 23 (a), the plug 21 used in the third embodiment has two thin rectangular parallelepiped plate-like terminals 22 and 23 (however, the description of the configuration of the embodiment is omitted). For convenience, only a terminal 22 is displayed) and is connected to a load F (F1 is shown for convenience in the drawing) via a cord 25.

  As shown in FIG. 19A to FIG. 23A, the DC outlet includes a plurality of plug insertion circuits 4 each having a first circuit 5 and a second circuit 7 (however, FIG. , Only the plug insertion circuit 4a is displayed.). The first circuit 5 of the plug insertion circuit 4 can be in contact with the terminal 22 of the plug 21 that is connected to the positive electrode side 3 of the DC power source and connected to the DC outlet at the other end in the third embodiment. A simple electrode 42 is arranged. The electrode 42 functions as the opening / closing mechanism 6, and turns on / off the opening / closing mechanism 6 by contacting or leaving the terminal 22 of the plug 21. The second circuit 7 of the plug insertion circuit 4 has one end connected to the arc extinguishing circuit 13 described below, and the other end has an electrode 43 that can contact the terminal 22 of the plug 21 inserted into a DC outlet. Has been placed. The electrode 43 acts as the opening / closing mechanism 8, and turns on / off the opening / closing mechanism 8 by contacting or leaving the terminal 22 of the plug 21.

  Moreover, the DC outlet has an arc extinguishing circuit 13 in which a circuit breaker 14 is arranged. The arc extinguishing circuit 13 is integrated into one, one end is connected to the positive electrode side 3 of the DC power supply, and the other end is connected to the plurality of second circuits 7 at point D. In this embodiment, the backflow prevention element 44 such as a diode or a thyristor is arranged on the side closest to the point D in the second circuit 7.

  Further, the DC outlet has a control circuit 45 for turning on and off the circuit breaker 14, and this control circuit 45 has one end connected to the positive side 3 of the DC power supply and the other end connected to the DC. The electromagnetic coil 46 is arranged while being connected to the negative electrode side 2 ′ of the power source. The control circuit 45 includes two opening / closing mechanisms 47 and 48 between the electromagnetic coil 46 and the negative electrode side 2 'of the DC power source.

  The opening / closing mechanism 47 is basically composed of a movable portion 49 that is always urged toward the terminal 22 of the plug 21 and two contacts 50 and 50 that are located closer to the terminal 22 of the plug 21 than the movable portion 49. ing. The opening / closing mechanism 47 is in a state in which the movable portion 49 is pressed against the urging force by the plug 21 when the movable portion 49 is in contact with the side surface of the terminal 22 of the plug 21. When the movable part 49 is not in contact with the side surface of the terminal 22 of the plug 21, the movable part 49 is not pressed by the plug 21, so that it comes into contact with the contacts 50, 50 by the urging force. ing.

  The opening / closing mechanism 48 basically includes a movable portion 51 that is always urged toward the terminal 22 of the plug 21 and two contact points 52 and 52, and the movable portion 51 is plugged more than the contact points 52 and 52. 21 on the terminal 22 side. The opening / closing mechanism 48 is in a state in which the movable portion 51 is pressed against the urging force by the plug 21 when the movable portion 51 is in contact with the side surface of the terminal 22 of the plug 21. , 52 and when the movable part 51 is not in contact with the side surface of the terminal 22 of the plug 21, the movable part 51 is not pushed by the plug 21, so that it does not come into contact with the contacts 52, 52 by the urging force. Yes. That is, power is supplied to the control circuit 45 only when the movable part 49 of the opening / closing mechanism 47 does not contact the terminal 22 of the plug 21 and the movable part 51 of the opening / closing mechanism 48 contacts the terminal 22 of the plug 21, The circuit breaker 14 is turned on by the electromagnetic force generated by the electromagnetic coil 46.

  In a normal state in which the plug 21 is inserted and power is supplied from the DC power source to the load F1 through the plug 21, as shown in FIG. Since the movable portion 49 of the opening / closing mechanism 47 is pushed by the terminal 22 of the plug 21 while being in contact with the terminal 22, it does not contact the contacts 50, 50, and power is not supplied to the electromagnetic coil 46. The circuit breaker 14 is also turned off. That is, the opening / closing mechanism 6 is on, the opening / closing mechanism 8 is on, and the circuit breaker 14 is off.

  Therefore, as shown in FIG. 19B, the current from the positive electrode side 3 of the DC power supply flows from the electrode 42 acting as the opening / closing mechanism 6 through the first circuit 5 to the terminal 22 of the plug 21. It reaches the load F1.

  On the other hand, when the plug 21 is pulled out from the DC outlet as shown in the direction of the arrow in FIGS. 20A to 23A, the following steps are mechanically switched.

  First, when the plug 21 is pulled out in the direction of the arrow so that the terminal 22 of the plug 21 moves from the position of FIG. 19A to the position of FIG. 20A, as shown in FIG. The terminal 22 of the plug 21 remains in contact with both the electrode 42 acting as the opening / closing mechanism 6 and the electrode 43 acting as the opening / closing mechanism 8, while the movable part 49 of the opening / closing mechanism 47 is pushed by the terminal 22 of the plug 21. The contact is made with the contacts 50, 50, and the movable part 51 of the opening / closing mechanism 48 is pushed by the terminal 22 of the plug 21, so that the contact with the contacts 52, 52 is maintained. Therefore, both the electrode 42 acting as the opening / closing mechanism 6 and the electrode 43 acting as the opening / closing mechanism 8 are turned on, the power is supplied to the electromagnetic coil 46, and the circuit breaker 14 is turned on. That is, the opening / closing mechanism 6 is on, the opening / closing mechanism 8 is on, and the circuit breaker 14 is on.

  Therefore, as shown in FIG. 20B, the current from the positive electrode side 3 of the DC power source flows from the electrode 42 acting as the opening / closing mechanism 6 through the first circuit 5 to the terminal 22 of the plug 21. After passing through the route to the load F1, the arc extinguishing circuit 13, the circuit breaker 14 disposed in the arc extinguishing circuit 13, and the diode 44, the electrode 43 acting as the opening / closing mechanism 8 through the second circuit 7 is connected to the plug 21. To the terminal 22 and another route to the load F1.

  Next, when the plug 21 is pulled out in the direction of the arrow so that the terminal 22 of the plug 21 moves from the position of FIG. 20A to the position of FIG. 21A, as shown in FIG. The terminal 22 of the plug 21 is separated from the electrode 42 that acts as the opening / closing mechanism 6, but maintains a state in contact with the electrode 43 that acts as the opening / closing mechanism 6, while the movable portion 49 of the opening / closing mechanism 47 has contacts 50, 50. In order to maintain the state where the movable part 51 of the opening / closing mechanism 48 is in contact with the contacts 52 and 52, respectively, the electromagnetic coil 46 is supplied with power and the circuit breaker 14 is maintained in the on state. That is, the open / close mechanism 6 is off, the open / close mechanism 8 is on, and the circuit breaker 14 is on.

  Accordingly, as shown in FIG. 21B, the current from the positive electrode side 3 of the DC power supply passes through the arc extinguishing circuit 13, the circuit breaker 14 disposed in the arc extinguishing circuit 13, and the diode 44, and then the second From the electrode 43 acting as the opening / closing mechanism 8 through the circuit 7 to the terminal 22 of the plug 21, the load F1 is further reached.

  Furthermore, at the stage where the plug 21 is pulled out in the direction of the arrow so that the terminal 22 of the plug 21 moves from the position of FIG. 21 (a) to the position of FIG. 22 (a), as shown in FIG. 22 (a), While the terminal 22 of the plug 21 is kept away from the electrode 42 acting as the opening / closing mechanism 6 and in contact with the electrode 43 acting as the opening / closing mechanism 8, the movable part 49 of the opening / closing mechanism 47 has contacts 50, 50. However, the movable part 51 of the opening / closing mechanism 48 is not pushed by the terminal 22 of the plug 21 because the terminal 32 of the plug 21 is detached and is separated from the contacts 52, 52, so that the electromagnetic coil 46 is not supplied with power. Is turned off. That is, the opening / closing mechanism 6 is off, the opening / closing mechanism 8 is on, and the circuit breaker 14 is off.

  Therefore, as shown in FIG. 22 (b), the current from the positive electrode side 3 of the DC power supply does not flow to either of the first circuits 5 and 7, and thus the electrode 42 and the opening / closing mechanism that act as the opening / closing mechanism 6 No current flows from any of the electrodes 43 acting as 8 to the terminal 22 of the plug 21.

  Then, as shown in FIG. 23A, when the terminal 22 of the plug 21 is completely pulled out from the DC outlet, the terminal 22 of the plug 21 is kept away from the electrode 42 acting as the opening / closing mechanism 6. While moving away from the electrode 43 acting as the opening / closing mechanism 8, the movable part 49 of the opening / closing mechanism 47 is kept in contact with the contacts 50, 50, and the movable part 51 of the opening / closing mechanism 48 is kept away from the contacts 52, 52, respectively. Therefore, since the power is not supplied to the electromagnetic coil 46, the circuit breaker 14 is maintained in the off state. That is, the opening / closing mechanism 6 is off, the opening / closing mechanism 8 is off, and the circuit breaker 14 is off.

  According to the above, even if the plug 21 in the state inserted into the DC outlet shown in FIG. 19 is completely pulled out as shown in FIG. The circuit 5 and the second circuit 7 are in a state in which the current is cut off, and the plug 21 is not energized. Therefore, it is possible to prevent the arc from occurring when the terminal 22 of the plug 21 is separated from the electrode 43. is there.

1 DC outlet integrated circuit 2, 2 'DC power supply negative side 3 DC power supply positive side 4a to 4g Plug insertion circuit (circuit)
5 Circuit (first circuit)
6 Opening and closing mechanism (first opening and closing mechanism)
7 Circuit (second circuit)
8 Opening / closing mechanism (second opening / closing mechanism)
9 Load side circuit 10 Bus (1st bus)
11 bus (second bus)
13 Arc extinguishing circuit 14 Breaker 15 Current transformer (detection mechanism)
16 to 18 Control section 19 Control unit 21 Plug 22, 23 Terminal 24 Plug body 25 Cord 27, 28 Disc-shaped member 29, 30 Insertion hole 31, 32 Electrode 33 Rotating shaft 34, 35 Raised section 36, 37 Movable section 36a , 37a Projection 38 Contact 40 Operation rod 42 Electrode (first opening / closing mechanism)
43 Electrode (second opening / closing mechanism)
44 Backflow prevention element such as diode or thyristor 45 Control circuit 46 Electromagnetic coil 47, 48 Opening / closing mechanism 49 Movable part 50 Contact point 51 Movable part 52 Contact point F1 to F7 Load

Claims (4)

A DC outlet having a plurality of circuits so that a current from a DC power source flows individually to a plurality of loads through a plug into which the current is inserted,
The circuit has a first circuit and a second circuit capable of diverting current, and the first circuit is provided with a first opening / closing mechanism for opening / closing the first circuit. The second circuit is provided with a second opening / closing mechanism for opening / closing the second circuit, and the upstream side of the second circuit is connected to one power supply common to the plurality of circuits. Connected to an arc circuit, the arc-extinguishing circuit is provided with a circuit breaker for opening and closing the arc-extinguishing circuit,
When the plug is inserted, the first opening / closing mechanism is in the on state, the second opening / closing mechanism is in the off state, and in the process of pulling out or rotating the plug, A DC outlet characterized in that the circuit breaker is sequentially turned on, the first switching mechanism is then turned off, and the second switching mechanism is turned off after the circuit breaker is turned off.   The circuit connects the first circuit to a first bus that is connected at one end to the DC power source, and the second circuit is connected to a second bus that carries the same pole-side current as the first bus. In addition to being connected, the first circuit and the second circuit are aggregated on the downstream side of the opening and closing mechanism to form a load side circuit that connects to one of the plurality of loads. The direct current outlet according to claim 1 characterized by things.   In the circuit, one end of the first circuit is connected to the DC power source, and the first opening / closing mechanism is disposed at the other end, and the first opening / closing mechanism is configured to contact and separate from the plug. The first circuit is opened and closed, one end of the second circuit is connected to one of a plurality of branch lines extending from the arc-extinguishing circuit, and the second opening and closing mechanism is disposed at the other end. The second opening / closing mechanism performs contact and separation with the plug, and the circuit breaker opens / closes to open / close the second circuit. DC outlet as described.   A detection mechanism for detecting an accident occurring in the load side circuit is disposed in the load side circuit. Even when the plug is inserted in response to a signal from the detection mechanism, first, the second opening / closing mechanism is provided. And the circuit breaker are sequentially turned on, then the first switching mechanism is turned off, and after the circuit breaker is turned off, the second switching mechanism is turned off. DC outlet according to 2.

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