Multifunctional electric meter with power-off protection

Abstract

The present invention relates to the technical field of electric meters. Disclosed is a multifunctional electric meter with power-off protection. In the present invention, the whole electric meter is divided according to functional regions into mutually independent modules including a functional module, an open-circuit protection module and a wiring module, and the functional module, the open-circuit protection module and the wiring module are connected to a protective housing by means of lock catch assemblies; and an internal circuit uses a conductive sheet I, a conductive sheet II, and a conductive sheet III, which are fixed for conduction. Therefore, on one hand, each part can be independently mounted and dismounted, thereby improving the convenience and also preventing damage to a normal module; on the other hand, the circuit is connected once the modules have been mounted and fixed and is disconnected upon disassembly, so that there is no need for independent circuit operation, thereby further improving the convenience.

Description

A multifunctional electric meter with power-off protection

[0001] The present invention relates to the technical field of electric meters, and in particular to a multifunctional electric meter with power-off protection.

[0002] Electricity meter, also known as energy meter, watt-hour meter, etc., can record the use of electricity in real time, including the time of use and amount of electricity used, etc., to help users understand the consumption of electricity, so as to use electricity reasonably, save energy and reduce waste.

[0003] A search revealed Chinese patent publication number CN201811984U, which discloses an electric meter box and electric meter box assembly, comprising an electric meter box body, a switch, an electric energy meter assembled with the electric meter box body, and a bracket; the switch is guided by the bracket to assemble with the electric energy meter; the electric energy meter has two first sockets that mate with the two first plug connectors of the switch, and when the two first plug connectors of the switch are plugged into the two first sockets of the electric energy meter, an electrical connection between the switch and the electric energy meter is achieved. Alternatively, the electric energy meter has two first plug connectors that mate with the two first sockets of the switch, and when the two first plug connectors of the electric energy meter are plugged into the two first sockets of the switch, an electrical connection between the switch and the electric energy meter is achieved.

[0004] The above patent has the following shortcomings: its various functional areas are a whole and are all contained inside the shell. Therefore, when a single functional area needs to be repaired, replaced, inspected, etc., the entire shell needs to be disassembled, which is not convenient and will also expose other normal areas, posing a risk of damage.

[0005] To this end, the present invention provides a multifunctional electric meter with power-off protection.

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multifunctional electric meter with power failure protection.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A multifunctional electric meter with power-off protection includes a mounting base and a protective shell fixed to the side wall of the mounting base.

[0009] The protective shell has three cavities, and the three cavities of the protective shell are respectively detachably connected with a functional module, a circuit breaker protection module and a wiring module;

[0010] The wiring module includes a wiring housing and a plurality of wiring terminals movably plugged into the inner wall of the wiring housing;

[0011] The functional module, the circuit breaker protection module and the wiring housing are all detachably connected to the protective shell via a locking assembly;

[0012] Conductive sheet one, conductive sheet two and conductive sheet three are fixed on the inner wall of the mounting base, and contact electrodes are fixed on the input and output ends of the functional module and the circuit breaker protection module. Conductive sheet one is used to connect the contact electrode and the wiring terminal of the input end of the circuit breaker protection module, conductive sheet three is used to connect the contact electrode of the output end of the circuit breaker protection module and the contact electrode of the input end of the functional module, and conductive sheet two is used to connect the contact electrode and the wiring terminal of the output end of the functional module.

[0013] Preferably: the functional module includes:

[0014] MCU processing chip, which is used for signal processing;

[0015] A metering module, which is used to monitor the electrical energy of the circuit;

[0016] MCU processing module, which is used for data processing;

[0017] A power module, which is used to convert input electrical energy into low-voltage electrical energy and supply power;

[0018] A display module for displaying electric energy usage;

[0019] The control module is used to control the MCU processor.

[0020] Furthermore: the locking assembly includes a connecting column fixed to the functional module, the circuit breaker protection module, and the bottom of the wiring shell, an elastic rod fixed to the bottom of the connecting column, and a top block engaged with the bottom of the elastic rod through an inclined surface. A locking hook is provided on the outer side of the elastic rod, and a lock groove that can be engaged with the locking hook is opened on the side wall of the protective shell.

[0021] Based on the above scheme: the inner wall of the mounting seat is slidably fitted with a magnetic plate, the multiple top blocks are fixed to the outer wall of one side of the magnetic plate, the other side wall of the magnetic plate is buckled with spring 1, and the other end of spring 1 is buckled to the inner wall of the mounting seat.

[0022] A more preferable solution among the above solutions is that the wiring terminal includes a shell movably plugged into the inner wall of the wiring housing, an electrode block fixed to the inner wall of the shell, and a screw connected to the inner wall of the shell through a thread.

[0023] As a further solution of the present invention: fixed pole pieces are fixed at both ends of one side of the electrode block, and a movable pole piece is rotatably connected to the middle part of the side of the electrode block. Multiple arches are provided on the movable pole piece and the fixed pole piece, and the screw is located on the other end of the movable pole piece.

[0024] At the same time, a second spring is welded to the bottom of the movable pole piece, and the other end of the second spring is fixed to the inner wall of the electrode block.

[0025] As a preferred embodiment of the present invention, the circuit breaker protection module includes a protection shell, a magnetic piston slidably connected to the inner wall of the protection shell, and multiple switch components arranged on the inner wall of the protection shell.

[0026] At the same time, the switch assembly includes two fixed electrodes, a movable electrode, an insulating block, and a lever. The two fixed electrodes are symmetrically fixed to the inner wall of the protective shell, and the two fixed electrodes are respectively connected to the input and output ends of the circuit breaker protection module. The two movable electrodes are connected through wires and are arranged in conjunction with the two fixed electrodes, and the two movable electrodes are respectively fixed to the side walls of the two insulating blocks. The two levers are arranged crosswise and symmetrically, and one end of the two levers is rotatably connected to the outer walls of the two insulating blocks respectively. The other ends of the two levers are provided with strip grooves, and the magnetic pistons are movably limited to the inner walls of the strip grooves through limit columns. The middle parts of all the levers are rotatably connected to the same limit shaft, and the two ends of the limit shaft are fixed to the inner wall of the protective shell.

[0027] As a more preferred solution of the present invention: an electromagnet is fixed to the bottom inner wall of the protective housing, the electromagnet is connected to the output terminal of the circuit breaker protection module, and a spring three is buckled on the bottom outer wall of the magnetic piston, and the other end of the spring three is buckled on the inner wall of the protective housing;

[0028] The inner wall of the protective shell is provided with a limiting assembly for limiting the magnetic piston, and the limiting assembly includes a spring four, a movable block and an arc head limiting block. The movable block is slidably connected to the inner wall of the protective shell, and the movable block is connected to the protective shell through a spring four. The arc head limiting block is fixed to the other side wall of the movable block, and the arc head limiting block is in contact with the magnetic piston for cooperation;

[0029] The inner cavity of the protective housing containing the switch assembly is filled with a mixed gas of nitrogen dioxide and nitrogen tetroxide;

[0030] The length between the limiting shaft and the insulating block is greater than the length between the limiting shaft and the limiting column.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention divides the entire electric meter into mutually independent modules, namely, a functional module, a circuit breaker protection module, and a wiring module, according to their functions. The functional module, the circuit breaker protection module, and the wiring module are connected to the protective shell through a locking assembly. The internal circuit adopts a fixed conductive form of conductive sheet one, conductive sheet two, and conductive sheet three. Therefore, on the one hand, each part can be independently installed and disassembled, which increases convenience while preventing normal modules from being damaged. On the other hand, the circuit is turned on after each module is installed and fixed, and the circuit is disconnected when it is disassembled, without the need for separate circuit operation, further increasing convenience.

[0033] 2. In the present invention, based on the arrangement of multiple modules, each module is fixed to the connecting column by a locking assembly, and the connecting column is further refined so that it can be engaged and disengaged under the influence of magnetic force. Combined with the electromagnetic induction effect when the meter is in use, compared with traditional bolt fixing, on the one hand, no additional operation of the fasteners is required for disassembly, and on the other hand, it can be disassembled only when the power is off, ensuring safety.

[0034] 3. The present invention, by arranging the terminal block as a combination of a movable electrode and a fixed electrode, increases the contact area with the wire core to ensure good contact on the one hand; on the other hand, the movable electrode and the fixed electrode are arranged in a staggered manner, which can fix wire harnesses of different thicknesses; at the same time, the provision of multiple arches enables each wire harness to be independent of each other when a single terminal block fixes multiple wire harnesses, thereby ensuring that each wire harness can be reliably fixed and conductive; finally, the movable electrode is fixed in the form of rotary crimping, and when fixing multiple wire harnesses, they can be fixed in sequence, so that only one wire harness can be operated at a time, which increases the convenience of operation.

[0035] 4. The present invention provides a magnetic piston and an electromagnet. When an abnormality occurs in the circuit, the magnetic piston is exerted with magnetic attraction force on the magnetic piston on the one hand, and is exerted with gas expansion on the other hand. Under the dual action, the reaction of the entire circuit breaker protection module is more sensitive, thereby increasing safety. On the other hand, by providing a lever and designing the length of the lever from the insulating block and the limit column, it can play a role in speeding up, preventing the generation of an arc between the movable electrode and the fixed electrode, thereby further increasing safety.

[0036] 5. The present invention fills the inner cavity of the protective shell with a mixture of nitrogen dioxide and dinitrogen tetroxide. When a circuit anomaly occurs, the gas's thermal expansion exerts pressure on the magnetic piston. Furthermore, the shift in chemical equilibrium increases the rate of pressure increase, thereby further accelerating the separation between the movable and fixed electrodes and preventing arcing. Furthermore, because the chemical bonds between nitrogen dioxide and dinitrogen tetroxide are stronger than those between air, nitrogen dioxide and dinitrogen tetroxide act as an insulating gas during filling, extinguishing arcs and further enhancing safety.

[0037] FIG1 is a schematic diagram of the overall structure of a multifunctional electric meter with power-off protection proposed by the present invention;

[0038] FIG2 is a schematic diagram of the internal structure of a multifunctional electric meter with power-off protection proposed by the present invention;

[0039] FIG3 is a schematic diagram of the connection structure of a functional module, a circuit breaker protection module, a wiring housing, and a mounting base of a multifunctional electric meter with power-off protection proposed by the present invention;

[0040] FIG4 is a schematic structural diagram of a multifunctional lock assembly of an electric meter with power-off protection proposed by the present invention;

[0041] FIG5 is a schematic diagram of the structure of a magnetic plate of a multifunctional electric meter with power-off protection proposed by the present invention;

[0042] FIG6 is a schematic diagram of the wiring terminal structure of a multifunctional electric meter with power-off protection proposed by the present invention;

[0043] FIG7 is a schematic cross-sectional view of the wiring terminal structure of a multifunctional electric meter with power-off protection proposed by the present invention;

[0044] FIG8 is a schematic diagram of the internal structure of a circuit breaker protection module of a multifunctional electric meter with power failure protection proposed by the present invention;

[0045] FIG9 is a schematic structural diagram of part A in FIG8 of a multifunctional electric meter with power-off protection proposed by the present invention;

[0046] FIG10 is a schematic diagram of the circuit structure of a multifunctional electric meter with power-off protection proposed by the present invention.

[0047] In the figure: 1. Mounting base; 2. Mounting ear; 3. Protective shell; 4. Functional module; 5. Circuit breaker module; 6. Wiring module; 7. Wiring shell; 8. Wiring terminal; 9. Conductive sheet 1; 10. Conductive sheet 2; 11. Contact electrode; 12. Lock assembly; 13. Connecting column; 14. Elastic rod; 15. Lock hook; 16. Lock slot; 17. Conductive sheet 3; 18. Top block; 19. Inclined surface; 20. Magnetic plate; 21. Spring 1; 22. Housing; 23. Movable pole piece; 24. Electrode block; 25. Fixed pole piece; 26. Arch; 27. Screw; 28. Spring 2; 29. ​​Switch assembly; 30. Fixed electrode; 31. Movable electrode; 32. Insulating block; 33. Lever; 34. Limiting shaft; 35. Strip groove; 36. Magnetic piston; 37. Limiting column; 38. Limiting assembly; 39. Spring 3; 40. Electromagnet; 41. Protective shell; 42. Spring 4; 43. Movable block; 44. Arc head limiting block.

[0048] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0049] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] Example 1:

[0051] A multifunctional electric meter with power-off protection, as shown in Figure 10, includes a mounting base 1 and a protective shell 3 fixed to the side wall of the mounting base 1, the protective shell 3 having three cavities, and the three cavities of the protective shell 3 are respectively detachably connected to a functional module 4, a circuit breaker protection module 5 and a wiring module 6.

[0052] The wiring module 6 includes a wiring housing 7 and a plurality of wiring terminals 8 movably plugged into the inner wall of the wiring housing 7 .

[0053] The functional module 4 , the circuit breaker protection module 5 and the wiring housing 7 are all detachably connected to the protective shell 3 via a locking assembly 12 .

[0054] The inner wall of the mounting base 1 is fixed with conductive sheet 1 9 , conductive sheet 2 10 and conductive sheet 3 17 , and the input and output ends of the functional module 4 and the circuit breaker protection module 5 are fixed with contact electrodes 11 , the conductive sheet 1 9 is used to connect the contact electrode 11 at the input end of the circuit breaker protection module 5 and the wiring terminal 8 , the conductive sheet 3 17 is used to connect the contact electrode 11 at the output end of the circuit breaker protection module 5 and the contact electrode 11 at the input end of the functional module 4 , and the conductive sheet 2 10 is used to connect the contact electrode 11 at the output end of the functional module 4 and the wiring terminal 8 .

[0055] When the device is in use, the terminal 8 in contact with the conductive sheet 1 9 can be used as input, and the terminal 8 in contact with the conductive sheet 2 10 can be used as output. The input power is transmitted to the functional module 4 through the conductive sheet 1 9, and then output through the output end of the functional module 4. The output power enters the functional module 4 through the conductive sheet 3 17. On the one hand, the functional module 4 uses electric energy to power itself, and on the other hand, it monitors the voltage and current of the circuit and calculates the electric energy. Then the electric energy is transmitted to the terminal 8 as the output through the conductive sheet 2 10, thereby acting on the electrical equipment again.

[0056] This device divides the entire electric meter into mutually independent modules, namely, a functional module 4, a circuit breaker protection module 5, and a wiring module 6, according to their functions. The functional module 4, the circuit breaker protection module 5, and the wiring module 6 are connected to the protective shell 3 through a locking assembly 12. The internal circuit adopts a conductive sheet 1 9, a conductive sheet 2 10, and a conductive sheet 3 17 in a fixed conductive form. On the one hand, each part can be independently installed and disassembled, which increases convenience while preventing normal modules from being damaged. On the other hand, the circuit is turned on after each module is installed and fixed, and the circuit is disconnected when it is disassembled. There is no need for separate circuit operation, which further increases convenience.

[0057] The functional module 4 includes:

[0058] MCU processing chip, which is used for signal processing;

[0059] A metering module, which is used to monitor the electrical energy of the circuit;

[0060] MCU processing module, which is used for data processing;

[0061] A power module, which is used to convert input electrical energy into low-voltage electrical energy and supply power;

[0062] A display module for displaying electric energy usage;

[0063] The control module is used to control the MCU processor.

[0064] Since the above components are all existing technologies and are relatively mature, this embodiment does not make any creative work on them, so they will not be described in detail.

[0065] In order to solve the safety problem; as shown in Figure 4, the locking assembly 12 includes a connecting column 13 fixed to the functional module 4, the circuit breaker protection module 5, and the bottom of the wiring housing 7, an elastic rod 14 fixed to the bottom of the connecting column 13, and a top block 18 engaged with the bottom of the elastic rod 14 through an inclined surface 19. A locking hook 15 is provided on the outer side of the elastic rod 14, and a locking groove 16 that can be engaged with the locking hook 15 is opened on the side wall of the protective shell 3.

[0066] The connecting column 13 is transitionally matched with the inner wall of the protective shell 3, that is, they can slide relatively, but the sliding has a certain friction resistance.

[0067] The inner wall of the mounting base 1 is slidably fitted with a magnetic plate 20, and the plurality of top blocks 18 are fixed to one outer wall of the magnetic plate 20, and the other side wall of the magnetic plate 20 is buckled with a spring 21, and the other end of the spring 21 is buckled to the inner wall of the mounting base 1.

[0068] During installation, the connecting column 13 and the elastic rod 14 can be inserted into the inner wall of the protective shell 3. Then, after the electric meter is installed and powered on, a magnetic field will be generated inside the entire protective shell 3 due to the electromagnetic induction effect, and the magnetic field will attract the magnetic plate 20, causing the magnetic plate 20 to move, thereby driving the top block 18 to move. The inclined surface 19 expands the elastic rod 14 outward through the inclined surface 19, so that the lock hook 15 is inserted into the lock groove 16 to achieve engagement. After power is cut off, the elastic rod 14 is reset and the lock hook 15 is pulled out of the lock groove 16.

[0069] In this device, based on the arrangement of multiple modules, each module is fixed to the connecting column 13 by a locking assembly 12, and the connecting column 13 is further refined so that it can be engaged and disengaged under the influence of magnetic force. Combined with the electromagnetic induction effect when the meter is in use, compared with traditional bolt fixing, on the one hand, no additional fastener operation is required for disassembly, and on the other hand, it can be disassembled only when the power is off, thereby ensuring safety.

[0070] In order to solve the wiring problem; as shown in Figures 6 and 7, the terminal block 8 includes a housing 22 that is movable and plugged into the inner wall of the wiring housing 7, an electrode block 24 fixed to the inner wall of the housing 22, and a screw 27 that is threadedly connected to the inner wall of the housing 22.

[0071] Fixed pole pieces 25 are fixed at both ends of one side of the electrode block 24 , and a movable pole piece 23 is rotatably connected to the middle of the side of the electrode block 24 . A plurality of arch protrusions 26 are provided on both the movable pole piece 23 and the fixed pole piece 25 , and the screw 27 is located on one side of the other end of the movable pole piece 23 .

[0072] A second spring 28 is welded to the bottom of the movable pole piece 23 , and the other end of the second spring 28 is fixed to the inner wall of the electrode block 24 .

[0073] The side wall of the mounting seat 1 is fixed with a mounting ear 2 .

[0074] When installing and removing the wire, the core part of the wire can be inserted into the arch bulge 26 of the fixed pole piece 25, and then the screw 27 is tightened, which limits the other end of the movable pole piece 23, so that the movable pole piece 23 can be rotated, and the wire core inserted into the arch bulge 26 is gradually pressed and fixed from one side to the other.

[0075] This device, by setting the terminal 8 as a combination of a movable pole piece 23 and a fixed pole piece 25, on the one hand increases the contact area with the wire core to ensure good contact; on the other hand, the movable pole piece 23 and the fixed pole piece 25 are arranged in a staggered manner, which can fix wire harnesses of different thicknesses. At the same time, the provision of multiple arches 26 can make it possible for a single terminal 8 to fix multiple wire harnesses, and each wire harness is independent of each other, thereby ensuring that each wire harness can be reliably fixed and conductive. Finally, the movable pole piece 23 is fixed in the form of rotary crimping, and when fixing multiple wire harnesses, they can be fixed in sequence, so that only one wire harness can be operated at a time, which increases the convenience of operation.

[0076] When this embodiment is in use, the terminal 8 that contacts and cooperates with the conductive sheet 1 9 can be used as input, and the terminal 8 that contacts and cooperates with the conductive sheet 2 10 can be used as output. The input power is transmitted to the functional module 4 through the conductive sheet 1 9, and then output through the output end of the functional module 4. The output power enters the functional module 4 through the conductive sheet 3 17. On the one hand, the functional module 4 uses electric energy to power itself, and on the other hand, it monitors the voltage and current of the circuit and calculates the electric energy. Then, the electric energy is transmitted to the terminal 8 as the output through the conductive sheet 2 10, so as to act on the electrical equipment again. During installation, the connecting column 13 and the elastic rod 14 can be inserted into the inner wall of the protective shell 3, and then after the meter is installed and energized, Due to the electromagnetic induction effect, a magnetic field is generated inside the entire protective shell 3, which attracts the magnetic plate 20, causing the magnetic plate 20 to move, thereby driving the top block 18 to move. The inclined surface 19 expands the elastic rod 14 outward through the inclined surface 19, so that the lock hook 15 is inserted into the interior of the lock groove 16 to achieve engagement. After power is cut off, the elastic rod 14 is reset and the lock hook 15 is pulled out of the lock groove 16. When installing and removing the wire, the core part of the wire can be inserted into the arch 26 of the fixed pole piece 25, and then the screw 27 is tightened, which limits the other end of the movable pole piece 23, so that the movable pole piece 23 rotates, and the wire core inserted into the arch 26 is gradually pressed and fixed from one side to the other.

[0077] Example 2:

[0078] A multifunctional electric meter with power-off protection, as shown in Figures 9, is provided to solve the problem of circuit-breaking protection. This embodiment makes the following improvements on the basis of Example 1: the circuit-breaking protection module 5 includes a protective shell 41, a magnetic piston 36 slidably connected to the inner wall of the protective shell 41, and a plurality of switch assemblies 29 arranged on the inner wall of the protective shell 41.

[0079] The switch assembly 29 includes two fixed electrodes 30, a movable electrode 31, an insulating block 32, and a lever 33. The two fixed electrodes 30 are symmetrically fixed to the inner wall of the protective shell 41, and the two fixed electrodes 30 are respectively connected to the input end and the output end of the circuit breaker protection module 5. The two movable electrodes 31 are connected by wires and are arranged in conjunction with the two fixed electrodes 30, and the two movable electrodes 31 are respectively fixed to the side walls of the two insulating blocks 32. The two levers 33 are arranged crosswise and symmetrically, and one end of the two levers 33 is respectively rotatably connected to the outer walls of the two insulating blocks 32. The other ends of the two levers 33 are each provided with a strip groove 35, and the magnetic piston 36 is movably limited and matched to the inner wall of the strip groove 35 through a limiting column 37. The middle part of all the levers 33 is rotatably connected to the same limiting shaft 34, and the two ends of the limiting shaft 34 are fixed to the inner wall of the protective shell 41.

[0080] An electromagnet 40 is fixed to the bottom inner wall of the protective shell 41, and the electromagnet 40 is connected to the output terminal of the circuit breaker protection module 5. A spring three 39 is buckled on the bottom outer wall of the magnetic piston 36, and the other end of the spring three 39 is buckled on the inner wall of the protective shell 41.

[0081] The inner wall of the protective shell 41 is provided with a limiting assembly 38 for limiting the magnetic piston 36. The limiting assembly 38 includes a spring four 42, a movable block 43 and an arc head limiting block 44. The movable block 43 is slidably connected to the inner wall of the protective shell 41, and the movable block 43 is connected to the protective shell 41 through the spring four 42. The arc head limiting block 44 is fixed to the other side wall of the movable block 43, and the arc head limiting block 44 is in contact with the magnetic piston 36 for cooperation.

[0082] The inner cavity of the protective housing 41 containing the switch assembly 29 is filled with a mixed gas of nitrogen dioxide and dinitrogen tetroxide.

[0083] The length between the limiting shaft 34 and the insulating block 32 is greater than the length between the limiting shaft 34 and the limiting column 37 .

[0084] When this embodiment is in use, during normal operation, the current and voltage of the entire circuit are relatively small. At this time, the magnetic field of the electromagnet 40 is also small, and its magnetic attraction force on the magnetic piston 36 is small. On the other hand, the current between the fixed electrode 30 and the movable electrode 31 is also small, and the Joule heat generated is relatively small. The heat generation and heat dissipation in the inner cavity of the protective shell 41 reach a balance, and its inner cavity temperature is relatively low. When a short circuit or overload occurs in the circuit, on the one hand, the magnetic attraction force of the electromagnet 40 increases, and on the other hand, the heat generation in the inner cavity of the protective shell 41 is greater than the heat dissipation, and the temperature increases, thereby causing the volume of the mixed gas in the inner cavity of the protective shell 41 to expand. At the same time, the chemical equilibrium of the mixed gas shifts towards the direction of producing nitrogen dioxide, which also causes the volume to expand. The expanded volume causes the pressure in the inner cavity of the protective shell 41 to increase, and the force on the magnetic piston 36 increases. At this time, the magnetic piston 36 is affected by the gas force and the magnetic attraction force of the electromagnet 40 to overcome the elastic force of the spring three 39 and the elastic resistance of the arc head limit block 44, causing the lever 33 to rotate, thereby separating the movable electrode 31 from the fixed electrode 30 and disconnecting the circuit.

[0085] This device, by providing a magnetic piston 36 and an electromagnet 40, can exert a force on the magnetic piston 36 by using magnetic attraction on the one hand, and exert a force on the magnetic piston 36 by gas expansion on the other hand when an abnormality occurs in the circuit. Under the dual action, the reaction of the entire circuit breaker protection module 5 can be made more sensitive, thereby increasing safety. On the other hand, by providing a lever 33 and designing the length of the lever 33 from the insulating block 32 and the limit column 37, it can play a role in speeding up, preventing the generation of an arc between the movable electrode 31 and the fixed electrode 30, thereby further increasing safety.

[0086] In addition, the present device fills the inner cavity of the protective shell 41 with a mixture of nitrogen dioxide and dinitrogen tetroxide. When the circuit is abnormal, on the one hand, the gas thermal expansion itself is used to apply pressure to the magnetic piston 36. On the other hand, the pressure rise rate can be increased by shifting the chemical equilibrium, thereby further accelerating the separation between the movable electrode 31 and the fixed electrode 30 to prevent the generation of an arc. Moreover, since the chemical bonds between nitrogen dioxide and dinitrogen tetroxide are stronger than those of air, they can also act as insulating gases during filling, playing an arc extinguishing role, further increasing safety.

[0087] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent replacements or changes according to the technical solution and inventive concept of the present invention shall be covered by the protection scope of the present invention.

Claims

A multifunctional electric meter with power-off protection comprises a mounting base (1) and a protective shell (3) fixed to a side wall of the mounting base (1), characterized in that: The protective shell (3) has three cavities, and the three cavities of the protective shell (3) are respectively detachably connected with a functional module (4), a circuit breaker protection module (5) and a wiring module (6); the wiring module (6) includes a wiring housing (7) and a plurality of wiring terminals (8) movably plugged into the inner wall of the wiring housing (7); the functional module (4), the circuit breaker protection module (5) and the wiring housing (7) are all detachably connected to the protective shell (3) through a locking assembly (12); the inner wall of the mounting seat (1) is fixed with a conductive sheet 1 (9), a conductive sheet 2 (10 ) and conductive sheet three (17), the input end and output end of the functional module (4) and the circuit breaker protection module (5) are fixed with contact electrodes (11), the conductive sheet one (9) is used to connect the contact electrode (11) of the input end of the circuit breaker protection module (5) and the wiring terminal (8), the conductive sheet three (17) is used to connect the contact electrode (11) of the output end of the circuit breaker protection module (5) and the contact electrode (11) of the input end of the functional module (4), and the conductive sheet two (10) is used to connect the contact electrode (11) of the output end of the functional module (4) and the wiring terminal (8). The multifunctional electric meter with power failure protection according to claim 1 is characterized in that: The functional module (4) includes: an MCU processing chip for signal processing; a metering module for monitoring the electric energy of the circuit; an MCU processing module for data processing; a power module for converting input electric energy into low-voltage electric energy and supplying power; a display module for displaying electric energy usage; and a control module for controlling the MCU processor. The multifunctional electric meter with power failure protection according to claim 1 is characterized in that: The locking assembly (12) includes a connecting column (13) fixed to the bottom of the functional module (4), the circuit breaker protection module (5), and the wiring housing (7), an elastic rod (14) fixed to the bottom of the connecting column (13), and a top block (18) engaged with the bottom of the elastic rod (14) through an inclined surface (19), a locking hook (15) is provided on the outer side of the elastic rod (14), and a locking groove (16) that can be engaged with the locking hook (15) is opened on the side wall of the protective housing (3). The multifunctional electric meter with power failure protection according to claim 3 is characterized in that: The inner wall of the mounting seat (1) is slidably fitted with a magnetic plate (20), and the plurality of top blocks (18) are fixed to one side outer wall of the magnetic plate (20). The other side wall of the magnetic plate (20) is buckled with a spring (21), and the other end of the spring (21) is buckled to the inner wall of the mounting seat (1). The multifunctional electric meter with power failure protection according to claim 1 is characterized in that: The wiring terminal (8) comprises a shell (22) movably plugged into the inner wall of the wiring housing (7), an electrode block (24) fixed to the inner wall of the shell (22), and a screw (27) threadedly connected to the inner wall of the shell (22). The multifunctional electric meter with power failure protection according to claim 5 is characterized in that: Fixed pole pieces (25) are fixed at both ends of one side of the electrode block (24), and movable pole pieces (23) are rotatably connected in the middle of both sides of the electrode block (24). A plurality of arches (26) are provided on both the movable pole piece (23) and the fixed pole piece (25), and the screw (27) is located on one side of the other end of the movable pole piece (23). The multifunctional electric meter with power failure protection according to claim 6 is characterized in that: A second spring (28) is welded to the bottom of the movable pole piece (23), and the other end of the second spring (28) is fixed to the inner wall of the electrode block (24). The multifunctional electric meter with power failure protection according to claim 1 is characterized in that: The circuit breaker protection module (5) comprises a protection shell (41), a magnetic piston (36) slidably connected to the inner wall of the protection shell (41), and a plurality of switch components (29) arranged on the inner wall of the protection shell (41). The multifunctional electric meter with power failure protection according to claim 8 is characterized in that: The switch assembly (29) includes two fixed electrodes (30), a movable electrode (31), an insulating block (32), and a lever (33). The two fixed electrodes (30) are symmetrically fixed to the inner wall of the protective shell (41), and the two fixed electrodes (30) are respectively connected to the input end and the output end of the circuit breaker protection module (5). The two movable electrodes (31) are connected through wires and are arranged in conjunction with the two fixed electrodes (30). The two movable electrodes (31) are respectively fixed to the two insulating blocks (3 2), the two levers (33) are arranged crosswise and symmetrically, and one end of the two levers (33) is rotatably connected to the outer wall of the two insulating blocks (32), and the other end of the two levers (33) is provided with a strip groove (35), and the magnetic piston (36) is movably limited to the inner wall of the strip groove (35) through the limiting column (37), and the middle part of all the levers (33) is rotatably connected to the same limiting shaft (34), and the two ends of the limiting shaft (34) are fixed to the inner wall of the protective shell (41). The multifunctional electric meter with power failure protection according to claim 9 is characterized in that: An electromagnet (40) is fixed to the inner wall of the bottom of the protective shell (41), and the electromagnet (40) is connected to the output terminal of the circuit breaker protection module (5). A spring three (39) is buckled on the outer wall of the bottom of the magnetic piston (36), and the other end of the spring three (39) is buckled on the inner wall of the protective shell (41).

Images