Shrapnel-type wire connector of auxiliary terminal of intelligent electric energy meter

Abstract

The invention provides a shrapnel-type wire connector of an auxiliary terminal of an intelligent electric energy meter. The shrapnel-type wire connector comprises metal shrapnel which is connected with a fixed board; fasteners are fixedly connected to both ends of the fixed board; and a welding hole is formed at the tail end of the metal shrapnel. By adoption of the structure, the shrapnel-type wire connector has advantages of good contact effect and high fault tolerance rate; the contactable area when the metal shrapnel is contacted with a terminal screw is larger than the contactable area when the metal shrapnel is contacted with a terminal hole; virtual connection can be avoided; moreover, as compaction pressure of the shrapnel is smaller, the shrapnel-type wire connector is easy to fix.

Description

technical field [0001] The invention relates to a connector for connecting an electric energy meter conforming to the series standard of the intelligent electric energy meter of the State Grid Corporation of China to an electric energy meter verification device for connecting its auxiliary terminal to the electric energy meter verification device for electric energy measurement error and function test. Background technique [0002] The existing connectors used for error testing and function detection of smart electric energy meters (hereinafter referred to as electric energy meters) are connected to electric energy meter verification devices. The most common and widely used is the use of metal conductor alligator clips to clamp the auxiliary terminals of electric energy meters to obtain signals and through welding The wire transmission to the tail of the alligator clip is plugged into the connector of the watt-hour meter verification device. This kind of wiring device requir...

AI Technical Summary

Problems solved by technology

This kind of wiring device requires the electric energy meter to be installed with L-shaped metal sheets on its auxiliary terminals (at least 6). One end is fixed to the electric energy meter with auxiliary terminal screws, and the other end is used for clamping; The other end of the signal of the auxiliary terminal is exposed for clamping. Although these two methods can effectively output signals to the watt-hour meter verification device, they have many shortcomings: first, the waste of materials is serious, and both the former and the latter require additional connections. Body connection, that is, L-shaped metal sheet or short wire, each electric energy meter needs more than 6 additional connecting bodies, and the connecting body does not need to be used when installing and using the electric energy meter, resulting in waste of materials and increase in the manufacturing cost of the electric energy meter ; Secondly, the wiring efficiency is low. Since both of these two connection methods require manual wiring many times and need to correspond to their terminal clips one by one, it is easy to make wrong connections and virtual connections that will hinder the verification of the electric energy meter and take a lot of time. Finally, the wiring device The reliability rate is low. Due to the tight arrangement of the auxiliary terminals, the metal clamp wire head is easy to touch and short circuit occurs, or due to the high frequency of use of the connector, the metal clamp and the wire welding part are easily damaged, resulting in poor contact and the wire insertion part is easy to loose, resulting in signal failure. It is sent to the verification device of the electric energy meter, which affects the quality and efficiency of the meter calibration

[0003] Chinese Patent No. ZL200720106133.2 also discloses a connector that uses a spring pin to contact the output signal of the auxiliary terminal through the terminal hole, but the friction force provided by the fixed part of the connector (clamping the two sides of the electric energy meter by elastic force) is difficult to achieve Article 7.5 of "Interpretation of Type Specifications for Smart Energy Meters" stipulates that when the auxiliary terminal terminal is under the pressure of 10N in the shaft, the terminal should not be retracted, that is, the 6 auxiliary terminals must be at least greater than 60N; and the wiring needs to be from the electric energy meter Look up from the bottom to locate the auxiliary terminal hole to ensure good contact, and then clamp the electric energy meter shell with smooth surface by the clips at both ends. In the actual batch electric energy meter verification, it is impossible to observe the hole from the bottom of the electric energy meter upwards and confirm that the contact is good, and the positioning requirements are high. The positioning time is also long;

[0004] The auxiliary terminal terminal of the wire connector adopts the fixed spring needle mode and cannot be fine-tuned, and the small diameter of the auxiliary terminal hole increases the difficulty of positioning; because the existing electric energy meter verification device uses multiple single-row pin types such as 485 communication, clock pulse, and error Socket, its integrated wiring output mode requires structural modification of the electric energy meter verification device, which increases the cost of modification and reduces the safety factor of the original device

[0005] To sum up, the wiring time of batch electric energy meter verification accounts for about 1 / 3 of the total verification time, and the existing several wiring connector wiring methods cannot meet the huge verification demand of today's smart meters and the efficiency and accuracy of electric energy meter verification. requirements, there is an urgent need to provide new solutions

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