Today, I will introduce a national invention authorized patent-a new type of quick-wired combination smart meter. The patent was applied for by Huaihua Jiannan Machinery Factory Co., Ltd., and the authorization was announced on October 16, 2018. The invention relates to the technical field of smart electric meter design, in particular to a new type of quick-connection type combined smart electric meter. An electric meter is a meter used to measure electrical energy, which is widely used in the power industry. Smart meters have the following requirements for magnetic interference from external constant magnetic field to electromagnetic current transformer (CT) sampling: 300mT magnet interferes at the bottom of the meter, and the deviation of meter measurement accuracy (CT sampling accuracy) should be ≤2%. The existing smart meter is shown in Figure 1. The external network wire passes through the current transformer 3 through the wire connector 4 and is connected to the relay 2 and is led out. The induction wire of the current transformer is connected to the reading mechanism 1; Core, the ring iron core is surrounded by induction wires; when the current in the external network wires flows through the current transformer, the iron core magnetic induction line will be generated on the ring iron core, and the iron core magnetic induction line causes the induction on the current transformer The wire generates a secondary current and transmits it to the reading mechanism to achieve the purpose of measuring the current size of the PCB chip. The current transformer in the existing smart electric meter is exposed and fixed in the electric meter, which is very susceptible to the interference of the external magnetic field, which leads to errors in the current reading and reduces the accuracy of the electric power reading. Since the current transformer must be fixed on the electric meter during installation, and its induction wire also needs to be connected with the reading mechanism of the electric meter, its assembly process is complicated, the assembly speed is slow, and the production efficiency is reduced. If the current transformer is damaged, it is difficult to repair the meter. The user can only replace it with a new meter, which leads to a waste of resources. When the user needs to repair or replace the meter, the external power supply must be turned off first. Loosen the screws in the wire connectors with a screwdriver, and then pull out the wires of the meter to replace and repair the energy meter. This operation is complicated and slow, and turning off the external power supply will affect the living of the surrounding residents. Electricity, operation errors can easily lead to electric shock accidents. The purpose of the present invention is to solve the above problems and provide a new type of quick-connection type combined smart meter, which can make the current transformer in the meter be replaced and used repeatedly, and realize the rapid replacement and maintenance of the meter without turning off the external power supply. It is especially suitable for frequent replacement of electric meters on the construction site. The beneficial effects of the present invention: 1. The present invention adopts an independent combined current transformer, which can be quickly inserted into the electric energy meter for use, is convenient and quick to disassemble and assemble, subverts the traditional electric energy meter design, and greatly improves the service life and maintenance of the electric energy meter Convenience; 3 small current transformers that can be freely disassembled and assembled are separately designed in the combined current transformer, which solves the problem of replacing all of them as long as one of them is damaged in the traditional technical solution, which saves resources and improves the service life. At the same time, after the installation structure of the small current transformer and the transformer housing is changed, the thickness of the combined transformer is reduced, the volume becomes smaller, the installation is more convenient, and the cost is reduced. 2. In this technical solution, the 220v wire interface of the combined current transformer is set as a high-insulation concave jack and is set at the end of the transformer shell, and the connection point of the current transformer is set on the upper end surface of the transformer shell , It is at a different end surface from the 220v wire interface. Compared with the previous technical solution, it realizes that the current transformer can be freely disassembled and assembled even when the electric energy meter is energized, and it is very safe and reliable. 3. The small transformer box of the present invention is made of high-permeability materials, which saves materials and has better shielding effect compared to the entire transformer housing provided with a shielding layer; a positioning slot is provided on the combined transformer , The positioning piece is arranged in the transformer cavity to improve the positioning stability and make the current transformer run more stable and reliable. 4. In the present invention, two layers of plates with heat dissipation holes are provided at the bottom of the transformer cavity: a heat dissipation hole plate and a fixing plate, so that it can prevent water stains and dust from entering while achieving heat dissipation; at the same time, it is uniform on the transformer housing The heat dissipation groove is arranged horizontally, which makes the heat dissipation groove and the heat dissipation hole conductive, and improves the heat dissipation effect. Since the heat of the current transformer is separately emitted from the bottom outlet, it can ensure that the heat generated by the current transformer is not It will affect Other components in the electric meter, increase the service life of other components, and increase the total service life of the electric meter. 5. Move the combination switch upwards, the current is turned on, and the U-shaped lock lever moves upwards, so that the locking piece is stuck to the fixed copper core, and the connector cannot be manually pulled out. Move the combination switch down, and the current is disconnected. The U-shaped lock lever moves down, pushes the locking piece, and easily pulls out the connector, and the meter can be replaced quickly and safely. 6. In the unplugged connection sleeve, the locking piece is pressed against each other to completely isolate the copper core of the wiring from the outside, forming an insulation effect. Even if a rod is inserted into the connector, it will not get an electric shock. It is connected without disconnecting the external power supply. The external network wires of the connection sleeve will not have contact accidents. 7. The meter with wiring device can make the meter replacement more convenient. Because the unplugged connector is completely insulated, the meter can be replaced without turning off the power grid. It is especially suitable for frequent meter replacement on the construction site. Motorola Radio,Motorola Two Way Radios,Motorola Talkabout Radios,Motorola Handheld Radio Guangzhou Etmy Technology Co., Ltd. , https://www.gzdigitaltalkie.com