Large-current terminal structure of electric energy meter

Abstract

The utility model discloses a large-current terminal structure of an electric energy meter. The large-current terminal structure comprises a terminal main body, a thermistor is arranged on the terminal main body; the thermistor is tightly attached to the terminal main body to monitor the temperature of the terminal main body; the terminal main body is also provided with a hardware interface which is connected with an electric energy meter and transmits information. The terminal main body is provided with a radiating fin and a ventilation opening; an electroplated layer is arranged on the surface of the terminal main body; through the structural design of the terminal main body, the thermistor is embedded, the thermistor is in close contact with the metal part of the terminal main body, the thermistor and the terminal main body are fixed through the heat-conducting silica gel, the temperature is monitored in real time, the temperature reliability of the terminal is greatly improved, and once the temperature exceeds a set threshold value, a system can automatically give an alarm and start a cooling mechanism; and meanwhile, an electroplated layer thickening technology is adopted to reduce contact impedance, so that the electric energy meter can operate more efficiently, and the performance and the service life of the electric energy meter are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to electric energy meters, and in particular to a high-current terminal structure of an electric energy meter. Background Art

[0002] At present, the design of high-current terminals of electricity meters has considered improving the terminal metal electroplating technology. The solution of increasing the plating thickness and improving the contact area of ​​the screws by tightening the screws has solved the contact impedance problem of the product design itself. However, due to the lack of unified and standardized requirements for screw tightening torque, wire terminal processing and materials during on-site installation, the impedance of some on-site wiring at the terminal exceeds the specified value. If a large current passes through it for a long time, it will cause the terminal to generate high temperature and burn the terminal, thereby affecting the working efficiency and life of the electricity meter, and may even cause failures. Utility Model Content

[0003] The utility model aims to provide a high-current terminal structure of an electric energy meter, which can monitor the temperature of the electric energy meter terminal in real time, ensure the safe use of the electric energy meter, and reduce the impedance and improve the working efficiency of the electric energy meter.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a high-current terminal structure of an electric energy meter, comprising a terminal body;

[0005] The terminal body is provided with a thermistor;

[0006] The thermistor is closely attached to the terminal body to monitor the temperature of the terminal body;

[0007] The terminal body is also provided with a hardware interface for connecting to an electric energy meter to transmit information;

[0008] The terminal body is provided with a heat sink and a vent;

[0009] The surface of the terminal body is provided with an electroplating layer.

[0010] Preferably, the thermistor is fixed on the terminal body by thermally conductive silicone.

[0011] Preferably, the thermistor is connected to an NTC temperature measuring circuit, and real-time monitoring is performed through the NTC temperature measuring circuit.

[0012] Preferably, the NTC temperature measurement circuit includes an operational amplifier, a first resistor and a diode; one input pin of the operational amplifier is connected to the thermistor, and the other input pin is connected to the second resistor; the output pin of the operational amplifier is connected to the first resistor; and the first resistor is connected in series with the diode.

[0013] In a preferred solution, a third resistor is connected in parallel to one side of the operational amplifier; the operational amplifier is also provided with a power pin and a ground pin, wherein the power pin is connected to a capacitor, and the ground pin is directly grounded.

[0014] Preferably, one end of the thermistor is further connected to a fourth resistor.

[0015] Preferably, the electroplating layer is made of a high-conductivity alloy material.

[0016] Due to the application of the above technical solution, the beneficial effects of the present application compared with the prior art are:

[0017] The present application discloses a high-current terminal structure for an electric energy meter. The terminal body structure is designed with an embedded thermistor, so that the thermistor is in close contact with the metal part of the terminal body, and the thermistor and the terminal body are fixed by thermal conductive silicone. The temperature is monitored in real time, which greatly improves the reliability of the terminal temperature. Once the temperature exceeds the set threshold, the system will automatically alarm and start the cooling mechanism. In addition, the electroplating layer thickening technology is used to reduce the contact impedance, so that the electric energy meter can operate more efficiently, which greatly improves the performance and service life of the electric energy meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Attached Figure 1 It is a schematic diagram of the high current terminal structure of the electric energy meter of the utility model;

[0020] Attached Figure 2 This is a schematic diagram of the NTC temperature measurement circuit of the utility model;

[0021] Among them: 1. Terminal body; 2. Thermistor; 3. Hardware interface; 4. Heat sink; 5. Ventilation port; 6. Operational amplifier; 7. First resistor; 8. Diode; 9. Second resistor; 10. Third resistor; 11. Capacitor; 12. Fourth resistor. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0026] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Embodiment 1

[0029] Attached Figure 1-2 The utility model is a high current terminal structure of an electric energy meter, comprising a terminal body 1;

[0030] The terminal body 1 is provided with a thermistor 2; the thermistor 2 is fixed to the terminal body 1 by means of thermally conductive silicone;

[0031] The thermistor 2 is closely attached to the terminal body 1 to monitor the temperature of the terminal body 1; the thermistor 2 is connected to an NTC temperature measurement circuit and is monitored in real time by the NTC temperature measurement circuit; the NTC temperature measurement circuit includes an operational amplifier 6, a first resistor 7 and a diode 8; one input pin of the operational amplifier 6 is connected to the thermistor 2, and the other input pin is connected to a second resistor 9; the output pin of the operational amplifier 6 is connected to the first resistor 7; the first resistor 7 is connected in series with the diode 8; a third resistor 10 is also connected in parallel to one side of the operational amplifier 6; the operational amplifier 6 is also provided with a power pin and a ground pin, wherein the power pin is connected to a capacitor 11, and the ground pin is directly grounded; one end of the thermistor 2 is also connected to a fourth resistor 12;

[0032] The entire NTC temperature measurement circuit can monitor the temperature of the metal of the terminal body 1 in real time. Once the temperature exceeds the set threshold, the system will automatically alarm and start the cooling mechanism to ensure the safety of the energy meter;

[0033] The terminal body 1 is also provided with a hardware interface 3 for connecting to an electric energy meter to transmit information, so as to facilitate connecting to an electric energy meter to transmit information;

[0034] The terminal body 1 is provided with a heat sink 4 and a vent 5 to improve the heat dissipation effect of the terminal body 1;

[0035] The surface of the terminal body 1 is provided with an electroplating layer; the contact impedance is reduced by using a technology for thickening the electroplating layer on the surface of the terminal body 1. For example, by using a high-conductivity alloy material for electroplating, the impedance can be effectively reduced and the working efficiency of the electric energy meter can be improved.

[0036] The present application discloses a high-current terminal structure for an electric energy meter. The terminal body 1 is designed with a built-in thermistor 2, so that the thermistor 2 is in close contact with the metal part of the terminal body 1, and the thermistor 2 and the terminal body 1 are fixed by thermally conductive silicone. The temperature is monitored in real time, which greatly improves the reliability of the terminal temperature. Once the temperature exceeds the set threshold, the system will automatically alarm and start the cooling mechanism. In addition, the electroplating layer thickening technology is used to reduce the contact impedance, so that the electric energy meter can operate more efficiently, which greatly improves the performance and service life of the electric energy meter.

[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high current terminal structure for an electric energy meter, characterized in that: including a terminal body; The terminal body is provided with a thermistor; The thermistor is closely attached to the terminal body to monitor the temperature of the terminal body; The terminal body is also provided with a hardware interface for connecting to an electric energy meter to transmit information; The terminal body is provided with a heat sink and a vent; The surface of the terminal body is provided with an electroplating layer.

2. A high current terminal structure for an electric energy meter as claimed in claim 1, characterized in that: The thermistor is fixed on the terminal body through thermal conductive silicone.

3. The high current terminal structure of an electric energy meter as claimed in claim 1, characterized in that: The thermistor is connected to an NTC temperature measuring circuit and is monitored in real time by the NTC temperature measuring circuit.

4. A high current terminal structure for an electric energy meter as claimed in claim 3, characterized in that: The NTC temperature measurement circuit includes an operational amplifier, a first resistor and a diode; one input pin of the operational amplifier is connected to the thermistor, and the other input pin is connected to the second resistor; the output pin of the operational amplifier is connected to the first resistor; and the first resistor is connected in series with the diode.

5. A high current terminal structure for an electric energy meter as claimed in claim 4, characterized in that: A third resistor is also connected in parallel to one side of the operational amplifier; the operational amplifier is also provided with a power pin and a ground pin, wherein the power pin is connected to a capacitor, and the ground pin is directly grounded.

6. A high current terminal structure for an electric energy meter as claimed in claim 5, characterized in that: One end of the thermistor is also connected to a fourth resistor.

7. The high current terminal structure of an electric energy meter according to claim 1, characterized in that: The electroplating layer is made of a high-conductivity alloy material.

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