Portable energy release and storage device and permanent magnet type vacuum circuit breaker

Abstract

The utility model discloses a portable energy release and storage device and a permanent magnet type vacuum circuit breaker. The device comprises a voltage conversion module, a change-over switch, an energy storage element, an energy consumption element, a first interface and a second interface, the input end of the voltage conversion module is connected with an external power supply, the positive output end of the voltage conversion module is connected with the positive electrode of the energy storage element and the positive electrode of the first interface, and the negative output end of the voltage conversion module is connected with the second selection end of the change-over switch; the first selection end of the change-over switch is connected with the positive electrode of the second interface through the energy consumption element, and the control end of the change-over switch is connected with the negative electrode of the energy storage element and the negative electrodes of the first interface and the second interface. According to the utility model, the energy release function and the energy storage function are integrated together, the size and the weight of the device are reduced, the field debugging, operation and maintenance of the permanent magnet type vacuum circuit breaker are facilitated, and the problem that the service life of electrical elements of a control loop is shortened due to on-off operation under the state of insufficient energy storage of a permanent magnet mechanism is solved.

Description

Technical Field

[0001] The utility model belongs to the field of vacuum circuit breakers, and in particular relates to a portable energy storage device and a permanent magnet vacuum circuit breaker. Background Art

[0002] Currently, high- and low-voltage circuit breakers equipped with permanent magnetic mechanisms are attracting widespread attention and application in power supply and distribution systems for industries such as industrial and mining enterprises, railways, water conservancy, municipal administration, and electric power, due to their high reliability and long life. Compared to spring mechanisms, which store mechanical potential energy (i.e., energy stored by spring tension, which can be manually stored mechanically), permanent magnetic mechanisms store electrical energy, often using energy storage capacitors as the power source for the pulse excitation circuit. Therefore, in the absence of power or a failure in the energy storage power supply, permanent magnetic mechanisms are unable to store energy, while spring mechanisms can store energy manually. Therefore, compared to spring mechanisms, permanent magnetic mechanisms have always had functional drawbacks in terms of passive energy storage. In emergency situations, without the assistance of other power supply equipment, permanent magnetic mechanisms cannot store energy and open and close the circuit breaker. There are also no dedicated tools or devices for discharging the energy storage capacitors, making on-site commissioning and maintenance inconvenient. This has seriously hampered the promotion and rapid development of permanent magnetic mechanisms and high- and low-voltage circuit breakers equipped with them.

[0003] Currently, during on-site commissioning or maintenance of permanent-magnetic vacuum circuit breakers, energy storage and control power typically comes from the switchgear control busbar power supply or a mobile power supply vehicle. If the switchgear control busbar power supply fails or switchgear system construction is incomplete, a mobile power supply vehicle or power supply unit is the only option to provide energy storage and control power for the permanent-magnetic vacuum circuit breaker. Relying solely on mobile power supply vehicles or power supply units to provide energy storage and control power for the permanent-magnetic vacuum circuit breaker is extremely inconvenient to carry or transport due to their large size and weight. This not only increases management costs and operational difficulties, but also restricts the efficiency of emergency repairs.

[0004] For specific occasions such as transportation and transshipment, it is necessary to discharge the energy storage capacitor of the permanent magnetic vacuum circuit breaker. There are two existing energy discharge solutions:

[0005] The first method involves disconnecting the energy storage power supply of the permanent magnet vacuum circuit breaker and performing multiple closing and opening operations until the voltage of the energy storage capacitor reaches zero, thereby discharging the energy. This energy discharge scheme can cause closing and opening operations when the permanent magnet mechanism is under-energy-storage, significantly impacting the control circuit electrical components and, to a certain extent, reducing their service life and control lifespan.

[0006] The second method is to use a resistor element to directly connect the positive and negative poles of the energy storage capacitor to release energy through discharge. If this energy release scheme is not operated carefully, it will cause the positive and negative poles of the energy storage capacitor to short-circuit, resulting in danger to the energy discharge operator and damage to energy storage and control components such as capacitors, making it impossible to ensure the safety of personnel and equipment. Utility Model Content

[0007] The purpose of the present utility model is to provide a portable energy storage release device and a permanent magnet vacuum circuit breaker to solve at least one of the following problems during on-site commissioning and maintenance of high and low circuit breakers equipped with permanent magnet mechanisms: the lack of a dedicated energy storage release device leads to low operation and maintenance efficiency, poor safety, a large device size, inconvenience in carrying, cumbersome operation, and high professional requirements.

[0008] The present utility model solves the above-mentioned technical problems through the following technical solutions: a portable energy storage device, comprising a voltage conversion module, a conversion switch, an energy storage element, an energy consumption element, a first interface and a second interface; the input end of the voltage conversion module is connected to an external power supply, the positive output end of the voltage conversion module is connected to the positive pole of the energy storage element and the positive pole of the first interface, and the negative output end of the voltage conversion module is connected to the second selection end of the conversion switch; the first selection end of the conversion switch is connected to the positive pole of the second interface through the energy consumption element, and the control end of the conversion switch is connected to the negative pole of the energy storage element, the first interface and the negative pole of the second interface.

[0009] When the permanent magnet vacuum circuit breaker is subjected to energy storage operation, the first interface is connected to the energy storage circuit of the permanent magnet vacuum circuit breaker, the control end of the conversion switch is connected to the second selection end, the energy storage circuit is turned on, and the external power supply is converted by the voltage conversion module and then discharges energy into the energy storage circuit of the permanent magnet vacuum circuit breaker through the energy storage element; when the permanent magnet vacuum circuit breaker is subjected to energy release operation, the second interface is connected to the energy release circuit of the permanent magnet vacuum circuit breaker, the control end of the conversion switch is connected to the first selection end, the energy release circuit is turned on, and the energy release circuit of the permanent magnet vacuum circuit breaker releases energy through the energy consumption element.

[0010] Furthermore, the energy storage element is a capacitor, and the energy consumption element is a resistor.

[0011] Furthermore, a diode is provided between the positive electrode of the energy storage element and the positive electrode of the first interface.

[0012] Furthermore, the device also includes a voltage monitoring module for monitoring the voltage of the energy storage circuit of the permanent magnet vacuum circuit breaker or the voltage of the energy release circuit of the permanent magnet vacuum circuit breaker, and a display module connected to the voltage monitoring module.

[0013] When performing energy storage operation, the voltage of the energy storage circuit of the permanent magnet vacuum circuit breaker is monitored by the voltage monitoring module, and the voltage is displayed on the display module. When the voltage of the energy storage circuit of the permanent magnet vacuum circuit breaker reaches the energy storage threshold, the energy storage operation of the permanent magnet vacuum circuit breaker is stopped by disconnecting the external power supply and the first interface; when performing energy release operation, the voltage of the energy release circuit of the permanent magnet vacuum circuit breaker is monitored by the voltage monitoring module, and the voltage is displayed on the display module. When the voltage of the energy release circuit of the permanent magnet vacuum circuit breaker reaches the energy release threshold, the energy release operation of the permanent magnet vacuum circuit breaker is stopped by disconnecting the external power supply and the second interface.

[0014] Furthermore, the device also includes an energy storage control branch, an energy release control branch, a first relay, and a second relay, wherein the energy storage control branch and the energy release control branch are both connected in parallel to the input end of the voltage conversion module; the coil of the first relay is connected in series to the energy release control branch, and the first normally open contact of the first relay is arranged between the first selection end of the conversion switch and the energy consumption element; the coil of the second relay is connected in series to the energy storage control branch, the first normally open contact of the second relay is arranged between the positive pole of the energy storage element and the positive pole of the first interface, and the second normally open contact of the second relay is arranged between the negative pole of the energy storage element and the negative pole of the first interface;

[0015] The voltage monitoring module adopts a voltage relay, which includes a power supply coil, a sampling coil, a first normally closed contact and a second normally closed contact. The sampling coil corresponds to the first normally closed contact and the second normally closed contact of the voltage relay; the power supply coil is connected in parallel to the input end of the voltage conversion module and is used to start monitoring; the positive pole of the first interface is connected to the positive pole of the second interface, the sampling coil is connected in parallel to the two ends of the first interface and the second interface and is used to monitor the energy storage circuit voltage of the permanent magnet vacuum circuit breaker or the energy release circuit voltage of the permanent magnet vacuum circuit breaker, the first normally closed contact of the voltage relay is connected in series in the energy storage control branch, and the second normally closed contact of the voltage relay is connected in series in the energy release control branch.

[0016] When performing energy storage operation, the energy release control branch is disconnected, the coil of the first relay loses power, and the first normally open contact of the first relay opens. The energy storage control branch is connected, the coil of the second relay becomes energized, the first normally open contact and the second normally open contact of the second relay close, and the energy storage circuit is connected. When external power is input, the power supply coil of the voltage relay becomes energized, the voltage relay starts, and the first normally closed contact and the second normally closed contact of the voltage relay close. When the voltage of the permanent magnet vacuum circuit breaker energy storage circuit measured by the sampling coil of the voltage relay reaches the energy storage threshold, the first normally closed contact of the voltage relay opens, disconnecting the energy storage control branch, de-energizing the coil of the second relay, and disconnecting the first normally open contact and the second normally open contact of the second relay. The energy storage circuit is automatically disconnected, thus realizing automatic disconnection control of energy storage operation.

[0017] During the energy release operation, the energy storage control branch is disconnected, the coil of the second relay loses power, the first and second normally open contacts of the second relay open, the energy storage element is disconnected from the first interface, and the energy storage circuit is disconnected. The energy release control branch is connected, the coil of the first relay is energized, the first normally open contact of the first relay closes, and the energy release circuit is connected. When external power is input, the power supply coil of the voltage relay is energized, the voltage relay is activated, and the first and second normally closed contacts of the voltage relay close. When the voltage of the permanent magnet vacuum circuit breaker's energy release circuit, as measured by the voltage relay's sampling coil, reaches the energy release threshold, the second normally closed contact of the voltage relay opens, disconnecting the energy release control branch, de-energizing the coil of the first relay, opening the first normally open contact of the first relay, and automatically disconnecting the energy release circuit, thus achieving automatic disconnection control during the energy release operation.

[0018] Furthermore, the energy storage control branch further includes a first indicator light, a first normally open button and a first normally closed button connected in series; the first normally open button is used to control the energy storage control branch to be connected, the first normally closed button is used to control the energy storage control branch to be disconnected, and the first indicator light is connected in parallel to both ends of the coil of the second relay and is used to indicate the energy storage operation status;

[0019] The energy release control branch also includes a second indicator light, a second normally open button and a second normally closed button connected in series; the second normally open button is used to control the energy release control branch to be connected, and the second normally closed button is used to control the energy release control branch to be disconnected. The second indicator light is connected in parallel to both ends of the coil of the first relay and is used to indicate the energy release operation status.

[0020] Furthermore, the first relay also includes a second normally open contact and a third normally closed contact; the second relay also includes a third normally open contact and a fourth normally closed contact; the second normally open contact of the first relay is connected in parallel to the two ends of the second normally open button, and the third normally closed contact of the first relay is connected in series to the energy storage control branch; the third normally open contact of the second relay is connected in parallel to the two ends of the first normally open button, and the fourth normally closed contact of the second relay is connected in series to the energy release control branch.

[0021] When performing energy storage operation, the energy storage control branch is connected, the coil of the second relay is energized, the third normally open contact of the second relay is closed and enters the self-holding state, the fourth normally closed contact of the second relay cuts off the energy release control branch, the coil of the first relay is de-energized, the energy release circuit is cut off, and interlocking protection is formed; when performing energy release operation, the energy release control branch is connected, the coil of the first relay is energized, the second normally open contact of the first relay is closed and enters the self-holding state, the third normally closed contact of the first relay cuts off the energy storage control branch, the coil of the second relay is de-energized, the energy release circuit is cut off, and interlocking protection is formed.

[0022] Furthermore, the device also includes a shell, the voltage conversion module, energy storage element, energy consumption element, voltage relay, first relay and second relay are arranged in the shell, the first indicator light, first normally open button, first normally closed button, second indicator light, second normally open button, second normally closed button, conversion switch and display module are arranged on the shell, and the first interface and second interface are arranged outside the shell.

[0023] Furthermore, a miniature circuit breaker is provided at the input end of the voltage conversion module.

[0024] Based on the same concept, the present invention also provides a permanent magnet vacuum circuit breaker, including the portable energy storage device as described above.

[0025] Beneficial effects

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] The portable energy-discharging and storing device provided by the utility model is a special energy-discharging and storing device for permanent-magnetic vacuum circuit breakers, which integrates the energy-discharging and storing functions, greatly reduces the volume and weight of the device, is easy to carry, and is convenient for on-site commissioning and operation and maintenance of permanent-magnetic vacuum circuit breakers. The utility model is used to perform energy-discharging operations on permanent-magnetic vacuum circuit breakers, and there is no need to perform energy-discharging operations through multiple opening and closing operations, which solves the problem that the opening and closing operations under the state of insufficient energy storage of the permanent-magnetic mechanism reduce the use and control life of the electrical components of the control circuit to a certain extent, and improves the operation and maintenance efficiency of the permanent-magnetic vacuum circuit breaker. The utility model is simple to operate and highly practical.

[0028] The utility model monitors the voltage of the energy storage circuit or the energy release circuit of the permanent magnet vacuum circuit breaker through the voltage monitoring module and displays it on the display module, thereby achieving timely stopping of the energy storage operation or the energy release operation and improving safety.

[0029] The utility model uses a voltage relay as a voltage monitoring module, and adds an energy storage control branch, an energy release control branch, a first relay and a second relay. Through the coordinated action of the voltage relay, the energy storage control branch, the energy release control branch, the first relay and the second relay, automatic disconnection control of energy storage operation and automatic disconnection control of energy release operation are realized, thereby improving the degree of automation and safety of the device.

[0030] The utility model realizes the electrical interlocking of the energy storage circuit and the energy release circuit through the first relay and the second relay, thereby ensuring the operational safety and improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a circuit diagram of a portable energy storage device in an embodiment of the present utility model;

[0033] Figure 2 This is an appearance diagram of a portable energy storage device in an embodiment of the present utility model. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0036] like Figure 1As shown, a portable energy storage device provided by an embodiment of the present invention includes a voltage conversion module DY, a conversion switch SA, an energy storage element, an energy consumption element, a first interface XT-1 / XT-2 and a second interface XT-3 / XT-2; the input end of the voltage conversion module DY is connected to an external power supply, the positive output end of the voltage conversion module DY is connected to the positive pole of the energy storage element and the positive pole XT-1 of the first interface, and the negative output end of the voltage conversion module DY is connected to the second selection end SA-2 of the conversion switch SA; the first selection end SA-1 of the conversion switch SA is connected to the positive pole XT-3 of the second interface through the energy consumption element, and the control end of the conversion switch SA is connected to the negative pole of the energy storage element, the negative pole XT-2 of the first interface and the negative pole XT-2 of the second interface.

[0037] The device's power supply is input via the L and N terminals, providing power to the entire device. The voltage conversion module DY provides DC charging power to the energy storage element, which then outputs the stored energy. When the permanent magnetic vacuum circuit breaker is performing energy storage, the first interface is connected to the permanent magnetic vacuum circuit breaker's energy storage circuit, the control terminal of the transfer switch SA is connected to the second selection terminal SA-2, the energy storage circuit is turned on, and the external power, after conversion by the voltage conversion module DY, discharges energy into the permanent magnetic vacuum circuit breaker's energy storage circuit through the energy storage element. When the permanent magnetic vacuum circuit breaker is performing energy release, the second interface is connected to the permanent magnetic vacuum circuit breaker's energy release circuit, the control terminal of the transfer switch SA is connected to the first selection terminal SA-1, the energy release circuit is turned on, and the permanent magnetic vacuum circuit breaker's energy release circuit releases energy through the energy dissipation element.

[0038] The portable energy storage device of the utility model has relatively independent energy storage circuit and energy release circuit, which can realize both energy storage operation and energy release operation of the permanent magnet vacuum circuit breaker, reducing the volume and weight of the device, and is simple to operate and highly practical, facilitating on-site commissioning and maintenance of the permanent magnet vacuum circuit breaker.

[0039] In a specific embodiment of the present invention, the energy storage element is a capacitor C, and the energy consumption element is a resistor R.

[0040] In a specific embodiment of the present invention, a diode D is provided between the positive electrode of the energy storage element and the positive electrode XT-1 of the first interface to prevent backflow during energy storage operation.

[0041] In a specific embodiment of the present invention, the portable energy storage device further includes a voltage monitoring module for monitoring the voltage of the energy storage circuit of the permanent magnet vacuum circuit breaker or the voltage of the energy release circuit of the permanent magnet vacuum circuit breaker, and a display module connected to the voltage monitoring module.

[0042] During the energy storage operation, the voltage of the energy storage circuit of the permanent magnet vacuum circuit breaker is monitored by the voltage monitoring module, and the voltage is displayed on the display module. When the voltage of the energy storage circuit of the permanent magnet vacuum circuit breaker reaches the energy storage threshold, the energy storage operation of the permanent magnet vacuum circuit breaker is stopped by disconnecting the external power supply and the first interface;

[0043] During the energy release operation, the voltage of the energy release circuit of the permanent magnet vacuum circuit breaker is monitored by the voltage monitoring module and the voltage is displayed on the display module. When the voltage of the energy release circuit of the permanent magnet vacuum circuit breaker reaches the energy release threshold, the energy release operation of the permanent magnet vacuum circuit breaker is stopped by disconnecting the external power supply and the second interface.

[0044] In a specific embodiment of the present invention, the portable energy storage device further includes an energy storage control branch, an energy release control branch, a first relay, and a second relay. The energy storage control branch and the energy release control branch are both connected in parallel to the input end of the voltage conversion module DY; the coil KM1 of the first relay is connected in series to the energy release control branch, and the first normally open contact KM1-1 of the first relay is arranged between the first selection end SA-1 of the conversion switch SA and the energy consumption element; the coil KM2 of the second relay is connected in series to the energy storage control branch, the first normally open contact KM2-1 of the second relay is arranged between the positive pole of the energy storage element and the positive pole XT-1 of the first interface, and the second normally open contact KM2-2 of the second relay is arranged between the negative pole of the energy storage element and the negative pole of the first interface;

[0045] The voltage monitoring module adopts a voltage relay, which includes a power supply coil VD-U, a sampling coil VD-J, a first normally closed contact VD-1 and a second normally closed contact VD-2. The sampling coil VD-J corresponds to the first normally closed contact VD-1 and the second normally closed contact VD-2 of the voltage relay; the power supply coil VD-U is connected in parallel to the input end of the voltage conversion module DY and is used to start monitoring; the positive pole XT-1 of the first interface is connected to the positive pole XT-3 of the second interface, the sampling coil VD-J is connected in parallel to both ends of the first interface and the second interface and is used to monitor the energy storage circuit voltage or the energy release circuit voltage of the permanent magnet vacuum circuit breaker, the first normally closed contact VD-1 of the voltage relay is connected in series in the energy storage control branch, and the second normally closed contact VD-2 of the voltage relay is connected in series in the energy release control branch.

[0046] During energy storage operation, the energy release control branch opens, de-energizing the coil KM1 of the first relay and opening the first normally open contact KM1-1 of the first relay. The energy storage control branch connects, energizing the coil KM2 of the second relay and closing the first normally open contacts KM2-1 and KM2-2 of the second relay, thus energizing the energy storage circuit. When external power is input, the power supply coil VD-U of the voltage relay energizes, actuating the voltage relay and closing the first normally closed contacts VD-1 and VD-2 of the voltage relay. When the voltage of the permanent magnet vacuum circuit breaker energy storage circuit, as measured by the sampling coil VD-J of the voltage relay, reaches the energy storage threshold, the first normally closed contact VD-1 of the voltage relay opens, disconnecting the energy storage control branch. This de-energizes the coil KM2 of the second relay and opens the first normally open contacts KM2-1 and KM2-2 of the second relay, terminating the energy storage element from charging the stored energy circuit. The energy storage circuit automatically disconnects, thus achieving automatic disconnection control for energy storage operation.

[0047] When the energy release operation is performed, the energy storage control branch is disconnected, the coil KM2 of the second relay loses power, the first normally open contact KM2-1 and the second normally open contact KM2-2 of the second relay are disconnected, the energy storage element is disconnected from the first interface XT-1 / XT-2, and the energy storage circuit is disconnected; the energy release control branch is connected, the coil KM1 of the first relay is energized, the first normally open contact KM1-1 of the first relay is closed, and the energy release circuit is connected. When external power is input, the power coil VD-U of the voltage relay is energized, the voltage relay is started, and the first normally closed contact VD-1 and the second normally closed contact VD-2 of the voltage relay are closed; when the voltage of the permanent magnet vacuum circuit breaker energy release circuit collected by the sampling coil VD-J of the voltage relay reaches the energy release threshold, the second normally closed contact VD-2 of the voltage relay is disconnected, so that the energy release control branch is disconnected, the coil KM1 of the first relay loses power, and the first normally open contact KM1-1 of the first relay is disconnected, stopping the energy-consuming element from discharging to the released energy circuit, and the energy release circuit is automatically disconnected, realizing automatic disconnection control of the energy release operation.

[0048] In a specific embodiment of the present invention, the energy storage control branch further includes a first indicator light LD, a first normally open button SBC1 and a first normally closed button SBC2 connected in series; the first normally open button SBC1 is used to control the energy storage control branch to be connected, and the first normally closed button SBC2 is used to control the energy storage control branch to be disconnected. The first indicator light LD is connected in parallel to both ends of the coil KM2 of the second relay and is used to indicate the energy storage operation status;

[0049] The energy release control branch also includes a second indicator light HD, a second normally open button SBF1 and a second normally closed button SBF2 connected in series; the second normally open button SBF1 is used to control the energy release control branch to be connected, and the second normally closed button SBF2 is used to control the energy release control branch to be disconnected. The second indicator light HD is connected in parallel to the two ends of the coil KM1 of the first relay and is used to indicate the energy release operation status.

[0050] When performing energy storage operation, press the first normally open button SBC1, the energy storage control branch is connected, the first indicator light LD is lit, the coil KM2 of the second relay is energized, the first normally open contact KM2-1 and the second normally open contact KM2-2 of the second relay are closed, and the energy storage circuit is connected; when the voltage of the permanent magnet vacuum circuit breaker energy storage circuit collected by the sampling coil VD-J of the voltage relay does not reach the energy storage threshold, the energy storage control branch can be disconnected by the first normally closed button SBC2, the energy storage operation is manually terminated, and the first indicator light LD goes out;

[0051] When performing the energy release operation, press the second normally open button SBF1, the energy release control branch is connected, the second indicator light HD lights up, the coil KM1 of the first relay is energized, the first normally open contact KM1-1 of the first relay is closed, and the energy release circuit is connected; when the voltage of the permanent magnet vacuum circuit breaker energy release circuit collected by the sampling coil VD-J of the voltage relay does not reach the energy release threshold, the energy release control branch can be disconnected by the second normally closed button SBF2, the energy release operation is manually terminated, and the second indicator light HD goes out.

[0052] In a specific embodiment of the present invention, the first relay also includes a second normally open contact KM1-2 and a third normally closed contact KM1-3; the second relay also includes a third normally open contact KM2-3 and a fourth normally closed contact KM2-4; the second normally open contact KM1-2 of the first relay is connected in parallel to the two ends of the second normally open button SBF1, and the third normally closed contact KM1-3 of the first relay is connected in series in the energy storage control branch; the third normally open contact KM2-3 of the second relay is connected in parallel to the two ends of the first normally open button SBC1, and the fourth normally closed contact KM2-4 of the second relay is connected in series in the energy release control branch.

[0053] During energy storage operation, the energy storage control branch is connected, the coil KM2 of the second relay is energized, the third normally open contact KM2-3 of the second relay is closed and enters a self-holding state, and the fourth normally closed contact KM2-4 of the second relay cuts off the energy release control branch, the coil KM1 of the first relay is de-energized, and the energy release circuit is cut off, forming an interlock protection; when the energy storage control branch is disconnected, the coil KM2 of the second relay is de-energized, and the third normally open contact KM2-3 and the fourth normally closed contact KM2-4 of the second relay are reset, that is, the third normally open contact KM2-3 of the second relay is disconnected and the fourth normally closed contact KM2-4 of the second relay is closed, thereby releasing the interlock protection;

[0054] When the energy release operation is performed, the energy release control branch is connected, the coil KM1 of the first relay is energized, the second normally open contact KM1-2 of the first relay is closed and enters the self-holding state, and the third normally closed contact KM1-3 of the first relay cuts off the energy storage control branch, and the coil KM2 of the second relay loses power, cutting off the energy release circuit to form interlocking protection; when the energy release control branch is disconnected, the coil KM1 of the first relay loses power, and the second normally open contact KM1-2 and the third normally closed contact KM1-3 of the first relay are reset, that is, the second normally open contact KM1-2 of the first relay is disconnected, and the third normally closed contact KM1-3 of the first relay is closed, and the interlocking protection is released.

[0055] In the specific implementation of the present invention, Figure 2 As shown, the portable energy storage device also includes a shell, a voltage conversion module DY, an energy storage element, an energy consumption element, a voltage relay VD, a first relay KM1 and a second relay KM2 are arranged in the shell, a first indicator light LD, a first normally open button SBC1, a first normally closed button SBC2, a second indicator light HD, a second normally open button SBF1, a second normally closed button SBF2, a transfer switch SA and a display module are arranged on the shell, and a first interface XT-1 / XT-2 and a second interface XT-3 / XT-2 are arranged outside the shell.

[0056] In this embodiment, miniature circuit breakers QF-1 / QF-2 are installed at the input of the voltage conversion module DY and are mounted on the housing. When connected to an external power source, closing miniature circuit breakers QF-1 / QF-2 powers the entire device; opening miniature circuit breakers QF-1 / QF-2 disconnects the external power source.

[0057] When the energy storage or release operation is completed, the transfer switch SA is returned to the neutral position to disconnect the control terminal of the transfer switch SA from the first selection terminal SA-1 and the second selection terminal SA-2. Then, the miniature circuit breaker QF-1 / QF-2 is opened to cut off the external power supply, completing the energy storage or release operation.

[0058] The utility model solves the problems of low operation and maintenance efficiency, poor safety, large equipment size, inconvenience in carrying, cumbersome operation and high professional requirements caused by the lack of a special device for releasing stored energy during on-site commissioning and maintenance of high and low circuit breakers equipped with permanent magnetic mechanisms. The utility model can quickly solve the energy storage and release discharge problems in the commissioning and maintenance process through a compact and easy-to-carry appearance design and simple control operation, thereby improving work efficiency, enhancing safety and reliability, reducing personnel workload, and better leveraging the technical advantages of permanent magnetic mechanisms and high and low circuit breakers equipped with permanent magnetic mechanisms.

[0059] The utility model has the function of real-time display of energy storage voltage or energy release voltage, and can set the energy storage threshold (i.e. the maximum energy storage voltage) and energy release threshold (i.e. the minimum energy release voltage). The energy storage and release voltage ranges can be set to any value within the required range.

[0060] The utility model realizes the connection between the device and the permanent magnet vacuum circuit breaker by matching the first interface and the second interface (socket) with the secondary plug of the permanent magnet vacuum circuit breaker, thereby ensuring the reliability of power use during operation; the switching of the storage and release functions is provided with an electrical interlock, thereby ensuring the safety of operation; the device cost is low, and the overall cost performance is high, which can provide favorable conditions for the rapid operation and maintenance and wide-area application of permanent magnet mechanisms and high and low voltage circuit breakers equipped with permanent magnet mechanisms.

[0061] The above disclosure is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, and they should all be included in the protection scope of the present invention.

Claims

1. A portable energy storage device, characterized in that: The device includes a voltage conversion module, a conversion switch, an energy storage element, an energy consumption element, a first interface, and a second interface; the input end of the voltage conversion module is connected to an external power supply, the positive output end of the voltage conversion module is connected to the positive pole of the energy storage element and the positive pole of the first interface, and the negative output end of the voltage conversion module is connected to the second selection end of the conversion switch; the first selection end of the conversion switch is connected to the positive pole of the second interface through the energy consumption element, and the control end of the conversion switch is connected to the negative pole of the energy storage element, the first interface, and the negative pole of the second interface.

2. The portable energy storage device according to claim 1, characterized in that: The energy storage element is a capacitor, and the energy consumption element is a resistor.

3. The portable energy storage device according to claim 1, characterized in that: A diode is provided between the positive electrode of the energy storage element and the positive electrode of the first interface.

4. The portable energy storage device according to claim 1, characterized in that: The device further comprises a voltage monitoring module for monitoring the voltage of the energy storage circuit of the permanent magnetic vacuum circuit breaker or the voltage of the energy release circuit of the permanent magnetic vacuum circuit breaker, and a display module connected to the voltage monitoring module.

5. The portable energy storage device according to claim 4, characterized in that: The device further includes an energy storage control branch, an energy release control branch, a first relay, and a second relay, wherein the energy storage control branch and the energy release control branch are both connected in parallel to the input end of the voltage conversion module; the coil of the first relay is connected in series to the energy release control branch, and the first normally open contact of the first relay is arranged between the first selection end of the conversion switch and the energy consumption element; the coil of the second relay is connected in series to the energy storage control branch, the first normally open contact of the second relay is arranged between the positive pole of the energy storage element and the positive pole of the first interface, and the second normally open contact of the second relay is arranged between the negative pole of the energy storage element and the negative pole of the first interface; The voltage monitoring module adopts a voltage relay, which includes a power supply coil, a sampling coil, a first normally closed contact and a second normally closed contact. The sampling coil corresponds to the first normally closed contact and the second normally closed contact of the voltage relay; the power supply coil is connected in parallel to the input end of the voltage conversion module and is used to start monitoring; the positive pole of the first interface is connected to the positive pole of the second interface, the sampling coil is connected in parallel to the two ends of the first interface and the second interface and is used to monitor the energy storage circuit voltage of the permanent magnet vacuum circuit breaker or the energy release circuit voltage of the permanent magnet vacuum circuit breaker, the first normally closed contact of the voltage relay is connected in series in the energy storage control branch, and the second normally closed contact of the voltage relay is connected in series in the energy release control branch.

6. The portable energy storage device according to claim 5, characterized in that: The energy storage control branch further includes a first indicator light, a first normally open button and a first normally closed button connected in series; the first normally open button is used to control the energy storage control branch to be connected, and the first normally closed button is used to control the energy storage control branch to be disconnected; the first indicator light is connected in parallel to both ends of the coil of the second relay and is used to indicate the energy storage operation status; The energy release control branch also includes a second indicator light, a second normally open button and a second normally closed button connected in series; the second normally open button is used to control the energy release control branch to be connected, and the second normally closed button is used to control the energy release control branch to be disconnected. The second indicator light is connected in parallel to both ends of the coil of the first relay and is used to indicate the energy release operation status.

7. The portable energy storage device according to claim 6, characterized in that: The first relay also includes a second normally open contact and a third normally closed contact; the second relay also includes a third normally open contact and a fourth normally closed contact; the second normally open contact of the first relay is connected in parallel to the two ends of the second normally open button, and the third normally closed contact of the first relay is connected in series in the energy storage control branch; the third normally open contact of the second relay is connected in parallel to the two ends of the first normally open button, and the fourth normally closed contact of the second relay is connected in series in the energy release control branch.

8. The portable energy storage device according to claim 7, characterized in that: The device also includes a shell, the voltage conversion module, energy storage element, energy consumption element, voltage relay, first relay and second relay are arranged in the shell, the first indicator light, first normally open button, first normally closed button, second indicator light, second normally open button, second normally closed button, conversion switch and display module are arranged on the shell, and the first interface and second interface are arranged outside the shell.

9. The portable energy storage device according to any one of claims 1 to 8, characterized in that: A miniature circuit breaker is provided at the input end of the voltage conversion module.

10. A permanent magnet vacuum circuit breaker, characterized in that: The permanent magnet vacuum circuit breaker includes the portable energy storage device according to any one of claims 1 to 9.

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