An intelligent circuit breaker

Abstract

The present invention discloses an intelligent circuit breaker, which is characterized in that it comprises a shell structure, a control unit and an isolation protection device. The shell structure comprises a accommodating chamber formed between a middle cover and an upper cover; the control unit comprises a circuit board assembly installed in the accommodating chamber and a power supply circuit structure for supplying power to the circuit board assembly; the isolation protection device is provided with a first isolation member and a second isolation member connected in series in an electrical circuit of the power supply circuit structure. When the circuit breaker is subjected to a withstand voltage test, the electrical circuit of the power supply circuit structure is disconnected by the isolation protection device, thereby cutting off the circuit connection between the circuit board assembly and the incoming line terminal, so as to avoid breakdown damage to the control unit caused by high voltage. The isolation protection device using the technical solution can play a role of electrical insulation isolation protection for the control unit part, and can also achieve the purpose of conducting a withstand voltage test on the circuit breaker without disassembling the control unit.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to an intelligent circuit breaker. Background Art

[0002] With the construction and development of the national smart grid, as the low-voltage distribution system at the end of the smart grid, the molded case circuit breaker is an important part of building a strong smart grid. The existing molded case circuit breaker is widely used in the distribution line for infrequent switching and motor protection. It has overload long delay, short circuit instantaneous and undervoltage protection functions, which can protect the line and power supply equipment from damage. With the increasing requirements for the intelligence of the molded case circuit breaker, it also has signal acquisition and remote control, telemetry, and remote adjustment functions. It is often necessary to perform real-time detection of many power parameters, such as voltage, current, power factor, harmonics, etc. The current practice is to install a control unit and a communication module in the circuit breaker. The control unit is mainly composed of several circuit boards and electronic components, and the detection circuit and control circuit in the circuit breaker are connected to these circuit boards by wires, so as to realize the information collection, communication transmission and intelligent control functions of the control unit for the circuit breaker. At the same time, these circuit boards are powered from the incoming line of the circuit breaker through the voltage-collecting power supply line, and the working voltage requirements of the control unit are met by transformer technology. However, existing circuit breakers need to undergo a power frequency AC withstand voltage test before leaving the factory. When the circuit breaker is powered on for the withstand voltage test, the power supply circuit of the control unit will be turned on, which is easy to break through the circuit board under high voltage conditions, thereby causing the entire control unit to be scrapped and need to be replaced, increasing manufacturing costs. Therefore, the entire control unit needs to be disassembled in advance before the circuit breaker undergoes the withstand voltage test. The installation and disassembly process is relatively cumbersome, affecting work efficiency. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the circuit breaker will turn on the power supply circuit of the control unit during the voltage withstand test, which is easy to break through the circuit board under high voltage, thereby causing the control unit and its circuit board to be scrapped and need to be replaced, increasing manufacturing costs.

[0004] In order to solve the above technical problems, the present invention provides an intelligent circuit breaker, comprising:

[0005] The shell structure includes a middle cover, an upper cover, and a receiving chamber formed between the middle cover and the upper cover;

[0006] A control unit, comprising a circuit board assembly installed in the accommodation chamber and a power supply circuit structure for supplying power to the circuit board assembly, wherein the power supply circuit structure connects the circuit board assembly with an inlet terminal of a circuit breaker;

[0007] An isolation protection device is installed in the shell structure and connected in series in the electrical circuit of the power supply circuit structure. The isolation protection device includes a first isolation member and a second isolation member for connecting or disconnecting the electrical circuit of the power supply circuit structure. The first isolation member and the second isolation member are movably connected and have the function of isolating the power supply circuit structure to form an isolation state of at least two breakpoints.

[0008] In the above-mentioned intelligent circuit breaker, the isolation protection device includes an installation cavity for accommodating a first isolation member and a second isolation member, the first isolation member includes two isolation sockets arranged in the installation cavity, the second isolation member includes an isolation plug-in that forms a plug-in electrical connection with the two isolation sockets, and the power-taking circuit structure includes a first circuit connecting one of the isolation sockets and the incoming line end, and a second circuit connecting the other isolation socket and the circuit board assembly; when the isolation plug-in is plugged into the two isolation sockets, the first circuit and the second circuit are connected, and when the isolation plug-in is pulled out of the two isolation sockets, the first circuit and the second circuit are disconnected.

[0009] In the above-mentioned intelligent circuit breaker, a circuit connection plate respectively connected to the first circuit and the second circuit is provided in the installation cavity, two isolation sockets are insulated from each other and arranged on the circuit connection plate and are respectively provided with a plurality of conductive sockets corresponding to each other, the isolation plug-in includes a plurality of plug-in terminals arranged in a U-shaped structure corresponding to the plurality of conductive sockets, and the two ends of each plug-in terminal are respectively plugged into the two conductive sockets corresponding to the two isolation sockets, so that the two isolation sockets are connected through the plurality of plug-in terminals to form a plurality of conductive paths, the isolation protection device is located in the accommodating chamber, and the isolation plug-in is detachably inserted into the upper cover relative to the isolation socket, so that the isolation plug-in is pulled outward from the upper cover to achieve separation and disconnection from the two isolation sockets.

[0010] In the above-mentioned intelligent circuit breaker, the isolation protection device includes a mounting base provided with a mounting cavity, the isolation socket and the circuit connection plate are integrally installed in the mounting base, the mounting base is detachably installed at the bottom of the upper cover, the top of the upper cover is provided with an operating port connected to the mounting cavity, the isolation plug-in is detachably connected to the operating port, and the isolation plug-in drives the core terminal to pass through the operating port to form a plug-in fit with the two isolation sockets.

[0011] In the above-mentioned intelligent circuit breaker, an upper limit groove is arranged around the operating port on the top of the upper cover, and the isolation plug-in includes an isolation cover that is blocked in the upper limit groove and covers the operating port, and a plurality of groups of jack structures are arranged at intervals on the isolation cover, and a plurality of plug-in terminals are sequentially and spaced apart and inserted into the isolation cover through the plurality of groups of jack structures.

[0012] In the above-mentioned intelligent circuit breaker, an installation groove is provided on the upper side surface of the isolation cover facing away from the operation port, and a plurality of strip grooves are arranged in the installation groove at intervals, and a plurality of groups of jack structures are correspondingly distributed in the plurality of strip grooves. The two ends of the plug-in terminal extend to the lower side surface of the isolation cover through the jack structure, and the U-shaped end of the plug-in terminal is accommodated in the strip groove. A pressure plate with a limited position for pressing the plurality of plug-in terminals is provided in the installation groove.

[0013] In the above-mentioned intelligent circuit breaker, the relative position between the mounting base and the upper cover is kept fixed by a connecting structure, and the connecting structure includes: two connecting bosses located on both sides of the operating port are provided at the bottom of the upper cover, and two connecting plates extending from both sides of the mounting base and cooperating with the two connecting bosses are abutted, and the two connecting bosses are kept fixedly connected with the two connecting plates by a fastening structure.

[0014] In the above-mentioned intelligent circuit breaker, the mounting seat and the upper cover are kept in fixed relative position by a connecting structure, and the connecting structure includes: a limiting boss is provided around the operating port at the bottom of the upper cover, and a limiting port connected to the operating port is formed around the limiting boss, and the top of the mounting seat is matched and accommodated in the limiting port, and a group of limiting blocks that cooperate with the limiting boss to form a limiting match are provided on both sides of the mounting seat, and a limiting portion that is limitedly abutted against the bottom end of the mounting seat is provided in the accommodating chamber.

[0015] In the above-mentioned intelligent circuit breaker, the isolation protection device is installed between the upper cover and the circuit board assembly, and the circuit board assembly includes a first control board and a second control board distributed in the accommodating chamber up and down, and the first control board includes a limiting portion that forms a limiting match with the bottom end of the mounting seat.

[0016] In the above-mentioned intelligent circuit breaker, the side wall of the mounting base is provided with two threading holes for two power lines to pass through, the first line and the second line are respectively composed of four wires, the two isolation sockets are respectively provided with four conductive jacks, and the isolation plug-in is provided with four core terminals.

[0017] In the above-mentioned intelligent circuit breaker, the shell structure also includes a base installed in cooperation with the middle cover, and a power-taking hole is provided at the bottom of the base corresponding to the position of the incoming line terminal, and a lead hole and a lead groove extending between the lead hole and the power-taking hole are provided at the bottom of the base. After the first line extends to the bottom of the base through the lead hole, it is inserted into the power-taking hole along the lead groove and connected to the component.

[0018] In the above-mentioned intelligent circuit breaker, the isolation protection device includes a mounting seat provided with a first isolation member and a second isolation member, the first isolation member includes a circuit connection plate fixed in the mounting seat, and two groups of contact structures relatively arranged on the circuit connection plate, the first isolation member includes an isolation slider reciprocatingly slidably arranged in the mounting seat, the bottom of the isolation slider is provided with a contact claw structure reciprocatingly moving between the two groups of contact structures, the isolation slider has a first position driving the contact claw structure to connect the two groups of contact structures, and a second position driving the contact claw structure to disconnect the connection with one of the groups of contact structures, and the isolation slider has a handle portion extending from the top of the upper cover.

[0019] In the above-mentioned intelligent circuit breaker, the two groups of contact structures respectively include a plurality of gold finger pieces spaced apart on the circuit connection plate, the contact claw structure includes a plurality of elastic contact claws arranged at the bottom of the isolation slider, and the power supply circuit structure includes a first circuit and a second circuit respectively connecting the two groups of contact structures.

[0020] The technical solution of the present invention has the following advantages compared with the prior art:

[0021] 1. In the intelligent circuit breaker provided by the present invention, the isolation protection device is provided with a first isolation member and a second isolation member connected in series in the electrical circuit of the power supply line structure. When the circuit breaker is working normally, the electrical circuit of the power supply line structure is connected through the electrical connection between the first isolation member and the second isolation member; and when the circuit breaker is subjected to a withstand voltage test, the electrical circuit of the power supply line structure is disconnected through the electrical separation between the first isolation member and the second isolation member, thereby cutting off the circuit connection between the circuit board assembly and the circuit breaker inlet terminal, thereby ensuring the electrical insulation isolation of the circuit board assembly, so as to avoid the high voltage generated during the withstand voltage test from causing breakdown damage to the control unit and its circuit board assembly. The isolation protection device using the technical solution can play the role of electrical insulation isolation protection for the control unit part during the withstand voltage test, and at the same time can achieve the purpose of conducting a withstand voltage test on the circuit breaker without disassembling the control unit.

[0022] 2. In the intelligent circuit breaker provided by the present invention, according to the isolation protection device including two isolation sockets and an isolation plug connected by plugging, the power circuit structure includes a first circuit and a second circuit respectively connected to the two isolation sockets. When the circuit breaker is working normally, the isolation plug is plugged into the two isolation sockets, so that the first circuit and the second circuit are connected through the two isolation sockets to achieve circuit connectivity, thereby connecting the electrical circuit of the power circuit structure to ensure normal power supply to the control unit part; and when the circuit breaker is subjected to a withstand voltage test, the electrical circuit of the power circuit structure can be disconnected by simply pulling out the isolation plug from the two isolation sockets, so that the first circuit and the second circuit are disconnected and cannot be conducted, thereby achieving electrical insulation isolation of the control unit part, and the isolation plug can be directly pulled out from the upper cover to achieve separation from the two isolation sockets, so that there is no need to disassemble the upper cover of the shell structure to perform the plug-in and pull-out operation on the isolation protection device, and the isolation plug and the isolation socket can be independently plugged in and out, so that the circuit breaker can be subjected to a withstand voltage test without disassembling the control unit, which is convenient and quick to operate, simplifies the operation steps, and improves work efficiency.

[0023] 3. In the intelligent circuit breaker provided by the present invention, conductive sockets are provided on the two isolation sockets, and the isolation plug-in is correspondingly provided with a plug-in terminal plugged into the conductive socket. This plug-in terminal is designed as a U-shaped structure, which can meet the electrical connection between the two isolation plug-ins. This structural setting is designed according to the principle of an electrical connector between the two isolation sockets and the isolation plug-in, has excellent electrical and mechanical properties, is convenient for plugging and unplugging, and the product structure is made more compact, realizing modular connection and improving installation efficiency. This design is also convenient for plugging and unplugging the isolation protection device. As long as the isolation plug-in is inserted or unplugged from the operating port position of the upper cover, the circuit between the two isolation sockets can be turned on or off. This setting does not require disassembling the entire circuit breaker or disassembling the control unit, so that the circuit breaker can be subjected to a withstand voltage test.

[0024] 4. In the intelligent circuit breaker provided by the present invention, a plurality of groups of jack structures for inserting a plurality of plug-in terminals are provided on the isolation cover. Such a design enables the plurality of plug-in terminals to be arranged in sequence and spaced apart on the isolation cover, and an installation groove surrounding the plurality of groups of jack structures is provided on the upper side of the isolation cover. A pressure plate is fixed to the installation groove to limit and press the plurality of plug-in terminals to prevent the plug-in terminals from detaching from the terminal slots, thereby playing a role in limiting the installation of the plurality of plug-in terminals.

[0025] 5. In the intelligent circuit breaker provided by the present invention, the first isolating member and the second isolating member can also adopt a connection method in which a claw structure and two groups of contact structures are in sliding contact. Specifically, the two groups of contact structures are respectively connected to the first circuit and the second circuit, and the claw structure is driven by the isolation slider to move back and forth between the two groups of contact structures. When the circuit breaker is working normally, the isolation slider drives the claw structure to move to the first position. At this time, the claw structure connects the two groups of contact structures, thereby connecting the electrical circuit of the power supply line structure to ensure normal power supply to the control unit part; and when the circuit breaker is subjected to a withstand voltage test, the isolation slider drives the claw structure to move to the second position. At this time, the claw structure disconnects the connection between the two groups of contact structures, thereby disconnecting the electrical circuit of the power supply line structure and realizing electrical insulation isolation of the control unit part. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the planar structure of the intelligent circuit breaker provided by the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the intelligent circuit breaker of the present invention along the AA line;

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the intelligent circuit breaker of the present invention along the opposite direction of line AA;

[0030] Figure 4 for Figure 3 A partial enlarged structural schematic diagram of the intelligent circuit breaker shown;

[0031] Figure 5 It is a schematic diagram of the structure of the intelligent circuit breaker of the present invention after the isolation plug-in is hidden;

[0032] Figure 6 It is a structural schematic diagram of the isolation protection device of the present invention;

[0033] Figure 7 It is a schematic diagram of the split structure of the isolation protection device of the present invention;

[0034] Figure 8 It is a schematic diagram of the installation structure of the base and the upper cover of the present invention;

[0035] Fig. 9It is a schematic diagram of another installation structure of the base and the upper cover of the present invention;

[0036] Fig.10 This is a schematic diagram of the structure of the first isolation member and the second isolation member in Example 2.

[0037] Explanation of the accompanying drawings: 1. Shell structure; 10. Accommodating chamber; 11. Upper cover; 12. Middle cover; 13. Base; 14. Operation port; 15. Power extraction hole; 2. Circuit board assembly; 21. First control board; 22. Second control board; 3. Power extraction circuit structure; 31. First circuit; 32. Second circuit; 4. Isolation protection device; 41. Mounting seat; 42. Threading port; 5. Isolation socket; 51. Conductive jack; 6. Isolation plug-in; 61. Plug terminal; 62. Isolation cover; 63. Installation groove; 64. Strip groove; 65. Press plate; 66. Lug structure; 7. Circuit connecting plate; 81. Isolation slider; 82. Contact claw structure; 83. Contact piece structure; 91. Connecting boss; 92. Connecting plate; 93. Limiting boss; 94. Limiting block; 95. Limiting part. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms “first”, “second” and “third” are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Example 1

[0043] The present embodiment is described in detail below with reference to the accompanying drawings:

[0044] This embodiment provides Figure 1-Figure 9 An intelligent circuit breaker is shown, comprising:

[0045] The housing structure 1 comprises a base 13, a middle cover 12, an upper cover 11 and a receiving chamber 10 formed between the middle cover 12 and the upper cover 11;

[0046] A control unit, comprising a circuit board assembly 2 installed in the accommodation chamber 10 and a power supply circuit structure 3 for supplying power to the circuit board assembly 2, wherein the power supply circuit structure 3 connects the circuit board assembly 2 with the incoming line terminal of the circuit breaker, that is, the circuit board assembly 2 takes power from the incoming line terminal of the circuit breaker;

[0047] The isolation protection device 4 is installed on the shell structure 1 and is used to connect or disconnect the power supply circuit structure 3. The isolation protection device 4 is provided with a first isolation member and a second isolation member connected in series in the electrical circuit of the power supply circuit structure 3. The first isolation member and the second isolation member are movably connected and have an isolation state in which the power supply circuit structure 3 is separated to form at least two breakpoints, and a joining state in which the electrical circuit of the power supply circuit structure 3 is connected, that is, the first isolation member and the second isolation member are electrically connected in the joined state, and are electrically disconnected in the isolation state to achieve separation.

[0048] In the above embodiment, the circuit board assembly 2 draws power from the incoming line end of the circuit breaker through the power supply line structure 3. The isolation protection device has a first isolation member and a second isolation member connected in series in the electrical circuit of the power supply line structure. When the circuit breaker is working normally, the electrical circuit of the power supply line structure 3 is connected through the electrical connection between the first isolation member and the second isolation member; and when the circuit breaker is subjected to a withstand voltage test, the electrical circuit of the power supply line structure 3 is disconnected through the electrical separation between the first isolation member and the second isolation member, thereby cutting off the circuit connection between the circuit board assembly and the incoming line end of the circuit breaker, thereby ensuring the electrical insulation isolation of the circuit board assembly, so as to avoid the high voltage generated during the withstand voltage test from causing breakdown damage to the control unit and its circuit board assembly. The isolation protection device using this technical solution can play the role of electrical insulation isolation protection for the control unit part during the withstand voltage test, while achieving the purpose of performing a withstand voltage test on the circuit breaker without disassembling the control unit.

[0049] Combine the following Figure 2-Figure 5 The specific structure of the isolation protection device is described in detail:

[0050] The isolation protection device 4 includes a mounting seat 41 with a mounting cavity, the first isolation member and the second isolation member are accommodated in the mounting cavity, the first isolation member includes two isolation sockets 5 arranged in the mounting cavity, the second isolation member includes an isolation plug-in 6 that forms a plug-in electrical connection with the two isolation sockets 5, the power supply circuit structure 3 includes a first circuit 31 connecting one of the isolation sockets 5 with the incoming line end, and a second circuit 32 connecting the other isolation socket 5 with the circuit board assembly 2, the isolation plug-in 6 connects the first circuit 31 and the second circuit 32 when plugged into the two isolation sockets 5, that is, the electrical circuit of the power supply circuit structure 3 is connected, and the isolation plug-in 6 disconnects the first circuit 31 and the second circuit 32 when pulled out of the two isolation sockets 5, that is, the electrical circuit of the power supply circuit structure 3 is disconnected. This isolation protection device 4 and its isolation sockets 5 are located in the accommodation chamber 10, and the isolation plug-in 6 is detachably inserted into the upper cover 11 relative to the isolation sockets 5, so that the isolation plug-in 6 is pulled out from the top of the upper cover to separate from the two isolation sockets 5. With this structural setting, when the circuit breaker is working normally, the isolation plug 6 is plugged into the two isolation sockets 5, so that the first circuit 31 and the second circuit 32 are connected through the two isolation sockets 5 to achieve circuit connectivity, thereby connecting the electrical circuit of the power circuit structure 3 to ensure normal power supply to the control unit; and when the circuit breaker is subjected to a withstand voltage test, the electrical circuit of the power circuit structure 3 can be disconnected by simply pulling out the isolation plug 6 from the two isolation sockets 5, so that the first circuit 31 and the second circuit 32 cannot be connected after being disconnected, thereby achieving electrical insulation isolation protection for the control unit. In addition, the isolation plug 6 is detachably connected to the upper cover 11 relative to the isolation socket 5, that is, the isolation plug 6 can be directly pulled out from the upper cover to achieve separation from the two isolation sockets 5, so that the isolation protection device can be operated without removing the upper cover of the shell structure, and the isolation plug and the isolation socket can be independently plugged in and out, so that the circuit breaker can be subjected to a withstand voltage test without disassembling the control unit, simplifying the operation steps, making the operation convenient and quick, and improving work efficiency.

[0051] Combination Figure 4 , Figure 6-Figure 7As shown, a circuit connection board 7 connected to the first circuit 31 and the second circuit 32 respectively is provided in the installation cavity, and the first circuit 31 and the second circuit 32 are connected to the circuit connection board 7 by plug-in connection or welding. Two isolation sockets 5 are insulated from each other and are arranged on the circuit connection board 7 and are respectively provided with a plurality of conductive sockets 51 corresponding to each other. The isolation plug-in 6 includes a plurality of plug-in terminals 61 arranged in a U-shaped structure corresponding to the plurality of conductive sockets 51, and the two ends of each plug-in terminal 61 are respectively plugged into the two conductive sockets 51 corresponding to the two isolation sockets 5. The isolation socket 5 has a socket terminal arranged in the conductive socket 51 and connected to the plug-in terminal 61, so that the two isolation sockets 5 are connected to each other through the plurality of plug-in terminals 61 to form a plurality of conductive paths. With this structural arrangement, the first circuit 31 and the first circuit 31 are connected to each other by plug-in terminals 61. The two circuits 32 are connected to the isolation plug-in 6 through two isolation sockets 5 to form one or more power supply circuits for the circuit board assembly. It is further preferably arranged that the isolation socket 5 and the circuit connection board 7 are integrally installed in the mounting seat 41, and the mounting seat 41 is detachably installed at the bottom of the upper cover 11. The mounting seat 41 not only plays an installation support role for the isolation socket 5, but also plays an insulating and isolating role for the isolation socket 5 and the control unit in the accommodating chamber 10 to ensure a safe electrical distance. The top of the upper cover 11 is provided with an operating port 14 connected to the installation cavity, and the opening of the installation cavity is provided at the top of the installation bottom. The isolation plug-in 6 is detachably connected to the operating port 14, and the isolation plug-in 6 drives the core terminal 61 to pass through the operating port 14 to form a plug-in fit with the two isolation sockets 5. It can be seen from the above structure that the plug-in terminal 61 is designed as a U-shaped structure to meet the electrical connection between the two isolation sockets. It is designed according to the principle of electrical connectors between the two isolation sockets 5 and the isolation plug-in 6, has excellent electrical and mechanical properties, is easy to plug and unplug, and has a more compact product structure to achieve modular connection and improve installation efficiency. This design also facilitates the detachable plug-in and pull-out operation of the isolation protection device. As long as the isolation plug-in is inserted or pulled out from the operating port of the upper cover, the circuit between the two isolation sockets can be connected or disconnected. This setting does not require disassembly of the entire circuit breaker or the control unit, so as to facilitate the withstand voltage test of the circuit breaker.

[0052] In order to facilitate the plugging and unplugging operation of the isolation plug-in 6 on the upper cover, Figure 5As shown, an upper limit groove is provided around the operation port 14 at the top of the upper cover 11, and the isolation plug-in 6 includes an isolation cover 62 which is blocked in the upper limit groove and covers the operation port 14, and a plurality of groups of jack structures are arranged at intervals on the isolation cover 62, and a plurality of plug-in terminals 61 are sequentially and spaced apart through the plurality of groups of jack structures. Two lug structures 66 are provided on both sides of the isolation cover 62, and the lug structures 66 are used to facilitate the application of force to grab the isolation cover 62. With this structural arrangement, the isolation cover 62 and a plurality of plug-in terminals 61 are assembled to form the isolation plug-in 6. Therefore, when the isolation cover 62 is installed in the upper limit groove, the plug-in terminals 61 are driven to be correspondingly inserted into the conductive jacks 51 of the two isolation sockets 5, thereby connecting the electrical circuit of the power supply circuit structure, and shielding the operation port 14 through the isolation cover 62 to play a protective role. The isolation cover 62 is designed to facilitate the plug-in connection between the isolation plug-in 6 and the isolation socket 5.

[0053] For further optimization, refer to Figure 6-Figure 7 The upper side of the isolation cover 62 facing away from the operation port 14 is provided with a mounting groove 63, and a plurality of strip grooves 64 are arranged in the mounting groove 63, and a plurality of groups of jack structures are distributed in the plurality of strip grooves 64 accordingly. The two ends of the plug-in terminal 61 extend to the lower side of the isolation cover 62 through the jack structure, and the U-shaped end of the plug-in terminal 61 is accommodated in the strip groove 64. A pressure plate 65 for pressing the plurality of plug-in terminals 61 with limited position is provided in the mounting groove 63, and the pressure plate 65 is detachably connected to the isolation cover 62, which is also convenient for replacement and maintenance of the plug-in terminals 61. This design enables the plurality of plug-in terminals 61 to be arranged on the isolation cover 62 in sequence and at intervals through the jack structure, so as to realize the integrated installation between the isolation cover 62 and the plurality of plug-in terminals 61, and the pressure plate 65 is fixed to the mounting groove 63 to play a role of limiting the pressing of the plurality of plug-in terminals 61, so as to prevent the plug-in terminals 61 from being separated from the jack structure, thereby playing a role of limiting the installation of the plurality of plug-in terminals.

[0054] In this embodiment, according to the three-phase four-wire system adopted by the circuit breaker, the circuit breaker is provided with four incoming terminals for connecting the A, B, C, and N lines, each of which includes an incoming terminal and an incoming board, and the housing structure 1 includes a base 13 mounted in cooperation with the middle cover 12, and the bottom of the base 13 is provided with four power-taking holes 15 corresponding to the incoming terminals, the first line 31 extends to the bottom of the base 13 and penetrates into the power-taking hole 15 and is connected to the incoming terminal, and the second line 32 is detachably connected to the circuit board assembly 2 through a wiring harness connector, for specific reference Figure 4 and Figure 6The side wall of the mounting seat 41 is provided with two threading openings for two power lines to pass through, so that the first line 31 and the second line 32 pass through the mounting seat 41 and are respectively connected to the line connection plate 7. The line connection plate 7 serves as an intermediate circuit connection between the two lines and the two isolation sockets 5. The first line 31 and the second line 32 are respectively composed of four wires. Correspondingly, four conductive sockets 51 are respectively provided on the two isolation sockets 5. The isolation plug-in is provided with four plug terminals 61, that is, the power line structure 3 formed by connecting the first line 31 and the second line 32 through the isolation protection device 4 has multiple power circuits. The advantage of such a design is that the power line structure 3 can be wired to draw power from the circuit breakers A, B, C, and N, so as to realize multi-way power supply to the control unit. Even if one phase of the circuit breaker fails, the control unit can still be normally powered by the remaining phase lines. The control unit includes a transformer module that can convert the voltage at the incoming line end into the working voltage required by itself.

[0055] The specific installation method of the isolation protection device is described in detail below:

[0056] This isolation protection device 4 can be assembled with the upper cover 11 to form an installation unit, and the mounting seat 41 and the upper cover 11 are kept in a fixed relative position by a connecting structure. Figure 4 and Figure 8 The connection structure includes: two connecting bosses 91 located on both sides of the operation port 14 are provided at the bottom of the upper cover 11, and two connecting plates 92 are extended on both sides of the mounting seat 41 to cooperate with the two connecting bosses 91. The two connecting bosses 91 and the two connecting plates 92 are fixedly connected by a fastening structure. The fastening structure can select screws, and there are screw holes on the connecting bosses 91 and the connecting plates 92. This structural setting fixes the mounting seat 41 to the top of the upper cover 11 by screw fastening, ensuring that the mounting cavity opening of the mounting seat 41 corresponds to the position of the operation port 14. According to the isolation socket 5 and the circuit connection plate 7 are fixed to the mounting seat 41, and the isolation plug-in 6 forms a pluggable electrical connection with the isolation socket 5 from the position of the operation port 14, so as to realize the installation connection between the isolation protection device 4 and the upper cover 11, and then when the upper cover 11 is installed to the middle cover 12, the isolation protection device 4 is driven to be partially loaded into the accommodating chamber.

[0057] As another connection structure between the mounting base 41 and the upper cover 11, refer to Fig. 9The mounting seat 41 and the upper cover 11 are kept in a fixed relative position by a connecting structure, and the connecting structure includes: a limiting boss 93 is provided around the operating port 14 at the bottom of the upper cover 11, and the limiting boss 93 is formed around a limiting port connected to the operating port 14, the top of the mounting seat 41 is matched and accommodated in the limiting port, and a group of limiting blocks 94 are provided on both sides of the mounting seat 41 to form a limiting match with the limiting boss 93, and a limiting portion 95 is provided in the accommodating chamber 10 to abut against the bottom end of the mounting seat 41, and the circuit board assembly 2 includes a first control board 21 and a second control board 22 distributed in the accommodating chamber 10 from top to bottom, and the first control board 21 and the second control board 22 are electrically connected by a circuit, and the second circuit is electrically connected to the second control board, and the first control board 21 includes a limiting portion 95 that forms a limiting match with the bottom end of the mounting seat, that is, the limiting portion 95 is used as a part of the first control board 21; or, the limiting portion 95 is a limiting baffle provided on the middle cover 12. This structural setting, during installation, the mounting seat 41 is inserted into the limiting opening, and the isolation plug-in 6 and the isolation socket 5 are plugged together, and the plug-in and pull-out force between the two is used to first position and connect the mounting seat 41 in the limiting opening, and then the upper cover 11 is installed to the middle cover 12, so that the bottom end of the mounting seat 41 is matched and abutted against the limiting portion 95 to form a limiting fit, and at the same time, the limiting block 94 is abutted against the limiting boss 93 to form another limiting fit, thereby limiting the mounting seat in the vertical direction, and the mounting seat is limitedly connected in the limiting opening, and the limiting opening is used to limit the mounting seat in the horizontal direction to prevent the mounting seat from being displaced relative to the upper cover. This setting plays a role in limiting the installation of the mounting seat 41 at the bottom of the upper cover, so that the isolation protection device 4 is stably and reliably installed between the upper cover 11 and the circuit board assembly 2, and the installation connection of the isolation protection device 4 and the upper cover 11 is realized, and the entire installation process does not require the use of fasteners such as screws, which simplifies the installation structure, makes the installation convenient and fast, and improves work efficiency. Since the distance between the isolation protection device 4 and the circuit board assembly 2 is relatively close, the isolation seat can ensure a safe electrical distance between the isolation socket 5 and the circuit board assembly 2. Those skilled in the art can select the connection structure between the mounting seat and the upper cover according to the above description, and other equivalent embodiments will not be described one by one here.

[0058] Example 2

[0059] As an alternative connection method of the first isolating member and the second isolating member, Fig.10As shown, the isolation protection device 4 includes a mounting seat 41 installed at the bottom of the upper cover 11, the first isolation member includes a circuit connection plate 7 fixed in the mounting seat 41, and two groups of contact structures 83 relatively arranged on the circuit connection plate 7, the second isolation member includes an isolation slider 81 reciprocatingly slidably arranged in the mounting seat 41, the bottom of the isolation slider 81 is provided with a contact claw structure 82 that reciprocates between the two groups of contact structures 83, the contact claw structure and the isolation slider are linked, the isolation slider 81 has a first position for driving the contact claw structure 82 to connect the two groups of contact structures 83, and a second position for driving the contact claw structure 82 to disconnect from one of the groups of contact structures 83, the power-taking circuit structure 3 includes a first circuit 31 and a second circuit 32 respectively connected to the two groups of contact structures 83, the isolation slider 81 has a handle portion extending from the top of the upper cover 11, the upper cover 11 is provided with an operation opening 14 for the handle portion to slide, and a cover covering the handle portion is provided at the operation opening 14 to prevent the isolation slider 81 from being arbitrarily operated to slide. As a specific structural setting, the two groups of contact sheet structures 83 respectively include a plurality of gold finger sheets arranged at intervals on the circuit connection plate 7, the contact claw structure 82 includes a plurality of elastic contact claws arranged at the bottom of the isolation slider 81, the first circuit 31 is electrically connected to the gold finger sheets of one group of contact sheet structures 83, and the first circuit 31 is electrically connected to the gold finger sheets of the other group of contact sheet structures 83. From the above structure, it can be seen that the first isolation member and the second isolation member of this embodiment adopt the connection mode of sliding contact between the contact claw structure 82 and the two groups of contact sheet structures 83 to realize the connection or disconnection of the power supply circuit structure 3, and the isolation slider 81 drives the contact claw structure 82 to move back and forth between the two groups of contact sheet structures 83, so the connection stability is good, the structure is more compact, and the operation is convenient. When the circuit breaker is working normally, the isolating slider 81 drives the contact claw structure 82 to move to the first position, and the contact claw structure 82 is now connected to the two groups of contact structures 83, so that the electrical circuit of the power supply line structure 3 is connected to ensure the normal power supply to the control unit; and when the circuit breaker is subjected to a withstand voltage test, the isolating slider 81 drives the contact claw structure 82 to move to the second position, and the contact claw structure disconnects the circuit connection between the two groups of contact structures, thereby disconnecting the electrical circuit of the power supply line structure and realizing electrical insulation isolation of the control unit.

[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An intelligent circuit breaker, characterized in that: include: A housing structure (1) comprises a middle cover (12), an upper cover (11), and a receiving chamber (10) formed between the middle cover (12) and the upper cover (11); A control unit, comprising a circuit board assembly (2) installed in the receiving chamber (10) and a power supply circuit structure (3) for supplying power to the circuit board assembly (2), wherein the power supply circuit structure (3) connects the circuit board assembly (2) and an incoming line terminal of a circuit breaker; An isolation protection device (4) is installed on the housing structure and is used to connect or disconnect the power supply circuit structure (3). The isolation protection device is provided with a first isolation member and a second isolation member connected in series in the electrical circuit of the power supply circuit structure (3). The first isolation member is movably connected to the second isolation member and has an isolation state of isolating the power supply circuit structure (3) to form at least two breakpoints. The isolation protection device (4) comprises an installation cavity for accommodating a first isolation member and a second isolation member, the first isolation member comprises two isolation sockets (5) arranged in the installation cavity, and the second isolation member comprises an isolation plug-in (6) forming a plug-in electrical connection with the two isolation sockets (5); The isolation protection device (4) comprises a mounting seat (41) provided with a mounting cavity, the isolation socket (5) and the circuit connection plate (7) are integrally mounted in the mounting seat (41), the mounting seat (41) is detachably mounted on the bottom of the upper cover (11), the top of the upper cover (11) is provided with an operating port (14) connected to the mounting cavity, the isolation plug (6) is detachably connected to the operating port (14), and the isolation plug (6) drives the plug-in terminal (61) to pass through the operating port (14) to form a plug-in fit with the two isolation sockets (5); An upper limit slot is arranged at the top of the upper cover (11) around the operating port (14); the isolation plug-in (6) comprises an isolation cover (62) that is received in the upper limit slot and covers the operating port (14); and a plurality of groups of jack structures are arranged at intervals on the isolation cover (62); and a plurality of plug-in terminals (61) are sequentially and spaced apart and inserted into the isolation cover (62) through the plurality of groups of jack structures.

2. The intelligent circuit breaker according to claim 1, characterized in that: The power supply circuit structure (3) comprises a first circuit (31) connecting one of the isolation sockets (5) and the incoming line end, and a second circuit (32) connecting the other isolation socket (5) and the circuit board assembly (2); when the isolation plug-in (6) is plugged into the two isolation sockets (5), the first circuit (31) and the second circuit (32) are connected; when the isolation plug-in (6) is pulled out of the two isolation sockets (5), the first circuit (31) and the second circuit (32) are disconnected.

3. An intelligent circuit breaker according to claim 2, characterized in that: A circuit connection plate (7) connected to the first circuit (31) and the second circuit (32) is provided in the installation cavity; two isolation sockets (5) are insulated from each other and arranged on the circuit connection plate (7) and are respectively provided with a plurality of conductive plug holes (51) corresponding to each other; the isolation plug (6) comprises a plurality of plug terminals (61) arranged in a U-shaped structure corresponding to the plurality of conductive plug holes (51); two ends of each plug terminal (61) are respectively plugged into two conductive plug holes (51) corresponding to the two isolation sockets (5); The isolation protection device (4) is located in the accommodating chamber (10), and the isolation plug-in (6) is detachably inserted into the upper cover (11) relative to the isolation socket (5), so that the isolation plug-in (6) can be pulled outward from the upper cover to achieve separation from the two isolation sockets (5).

4. The intelligent circuit breaker according to claim 1, characterized in that: The upper side surface of the isolation cover (62) facing away from the operation port (14) is provided with a mounting groove (63), a plurality of strip grooves (64) are arranged in the mounting groove (63), a plurality of groups of jack structures are correspondingly distributed in the plurality of strip grooves (64), the two ends of the plug-in terminal (61) extend out of the lower side surface of the isolation cover (62) through the jack structure, the U-shaped end of the plug-in terminal (61) is accommodated in the strip groove (64), and a pressure plate (65) for pressing the plurality of plug-in terminals (61) with a limited position is provided in the mounting groove (63).

5. An intelligent circuit breaker, characterized in that: include: A housing structure (1) comprises a middle cover (12), an upper cover (11), and a receiving chamber (10) formed between the middle cover (12) and the upper cover (11); A control unit, comprising a circuit board assembly (2) installed in the receiving chamber (10) and a power supply circuit structure (3) for supplying power to the circuit board assembly (2), wherein the power supply circuit structure (3) connects the circuit board assembly (2) and an incoming line terminal of a circuit breaker; An isolation protection device (4) is installed on the housing structure and is used to connect or disconnect the power supply circuit structure (3). The isolation protection device is provided with a first isolation member and a second isolation member connected in series in the electrical circuit of the power supply circuit structure (3). The first isolation member is movably connected to the second isolation member and has an isolation state of isolating the power supply circuit structure (3) to form at least two breakpoints. The isolation protection device (4) comprises a mounting seat (41) provided with a first isolation member and a second isolation member, the first isolation member comprises a circuit connection plate (7) fixed in the mounting seat (41), and two groups of contact sheet structures (83) arranged relatively on the circuit connection plate (7), the second isolation member comprises an isolation slider (81) arranged in the mounting seat (41) for reciprocating sliding, a contact claw structure (82) for reciprocating movement between the two groups of contact sheet structures (83) is provided at the bottom of the isolation slider (81), the isolation slider (81) has a first position for driving the contact claw structure (82) to connect the two groups of contact sheet structures (83), and a second position for driving the contact claw structure (82) to disconnect from one of the groups of contact sheet structures (83), and the isolation slider (81) has a handle portion extending from the top of the upper cover.

6. The intelligent circuit breaker according to claim 5, characterized in that: The two groups of contact sheet structures (83) respectively include a plurality of gold finger sheets arranged at intervals on the circuit connection plate (7), the contact claw structure (82) includes a plurality of elastic contact claws arranged at the bottom of the isolation slider (81), and the power supply circuit structure (3) includes a first circuit (31) and a second circuit (32) respectively connecting the two groups of contact sheet structures (83).

7. An intelligent circuit breaker according to claim 1 or 5, characterized in that: The mounting seat (41) and the upper cover (11) are kept in a fixed relative position by a connecting structure, and the connecting structure comprises: two connecting bosses (91) located on both sides of the operating port (14) are provided at the bottom of the upper cover (11); two connecting plates (92) are extended on both sides of the mounting seat (41) and are matched with and abutted against the two connecting bosses (91); the two connecting bosses (91) and the two connecting plates (92) are kept fixedly connected by a fastening structure.

8. An intelligent circuit breaker according to claim 1 or 5, characterized in that: The mounting seat (41) and the upper cover (11) are kept in a fixed relative position by a connecting structure, and the connecting structure comprises: a limiting boss (93) is provided around the operating port (14) at the bottom of the upper cover (11), and a limiting port connected to the operating port (14) is formed around the limiting boss (93); the top end of the mounting seat (41) is matched and accommodated in the limiting port, and a group of limiting blocks (94) are provided on both sides of the mounting seat (41) to cooperate with the limiting boss (93) to form a limiting match, and a limiting portion (95) is provided in the accommodation chamber (10) and is limitedly abutted against the bottom end of the mounting seat (41).

9. The intelligent circuit breaker according to claim 1, characterized in that: The circuit board assembly (2) comprises a first control board (21) and a second control board (22) which are distributed in the receiving chamber (10) from top to bottom, the first control board (21) comprising a limiting portion (95) which forms a limiting match with the bottom end of the mounting seat; the side wall of the mounting seat (41) is provided with two threading openings (42) for respectively inserting a first circuit and a second circuit, the first circuit (31) and the second circuit (32) are respectively composed of four wires, the two isolation sockets (5) are respectively provided with four conductive jacks (51), and the isolation plug-in is provided with four plug terminals (61); the housing structure (1) comprises a base (13) which is installed in cooperation with the middle cover (12), the bottom of the base (13) is provided with at least one power extraction hole (15) corresponding to the incoming line end, the first circuit (31) extends to the bottom of the base (13) and is inserted into the power extraction hole (15) to be connected with the incoming line end.

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