An electric energy meter with a relay convenient to replace and a method for replacing the relay thereof

Abstract

The application provides an electric energy meter with a relay convenient to replace and a method for replacing the relay, and the electric energy meter comprises a relay, characterized in that a conductive sheet and a sampling element are arranged on the relay, the conductive sheet and the sampling element are detachably connected with current terminals of the electric energy meter through connectors, and the relay is arranged outside a closed shell of the electric energy meter. The application overcomes the defect that the electric energy meter with a built-in relay is directly scrapped when a problem occurs, does not need to use an external circuit breaker with high price, can flexibly install and replace relays with different specifications according to actual conditions, enhances universality, saves resources and avoids waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of smart electric energy meter, in particular to an electric energy meter with a relay convenient to replace and a method for replacing the relay. BACKGROUND

[0002] According to the fee control mode, the single-phase smart electric energy meter can be divided into two types: switch built-in electric energy meter and switch external electric energy meter.

[0003] The switch built-in electric energy meter is seen Figure 1 In the current sampling part, the switch built-in electric energy meter adopts manganese copper and relay integrated design, and uses one device to realize current sampling and fee control.

[0004] The switch external electric energy meter is seen Figure 2 In the current sampling part, the switch external electric energy meter adopts manganese copper, and uses a small circuit breaker or intelligent circuit breaker for fee control.

[0005] With the reform of the smart grid of State Grid Corporation of China and the response to the call for the transformation from a manufacturing country to a manufacturing power, the State Grid Corporation of China has proposed a 16-year life requirement for electric energy meters. SUMMARY

[0006] The present application provides an electric energy meter with a relay convenient to replace and a method for replacing the relay, to solve the technical problem that the relay of the electric energy meter cannot be replaced flexibly in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] The utility meter with the relay convenient to replace comprises a relay, a conductive sheet and a sampling element arranged on the relay, the conductive sheet and the sampling element are detachably connected with current terminals of the utility meter through connectors, and the relay is arranged outside a closed shell of the utility meter.

[0009] As a further technical scheme of the present application, the connector comprises a plurality of connecting contacts and annular elastic members arranged on the connecting contacts, two conductive parts are arranged on one side of each connecting contact in the elastic member, a buckling groove is arranged between the two conductive parts, a current terminal connecting buckle is arranged on the current terminal, a relay connecting buckle is arranged on the conductive sheet and the sampling element, and annular grooves adapted to buckle the conductive parts are arranged on the relay connecting buckle and the current terminal connecting buckle. The pulling force of the annular elastic member ensures the contact between the two conductive parts on the connecting contact and the relay connecting buckle and the current terminal connecting buckle, and ensures the firmness of buckling of the relay connecting buckle and the current terminal connecting buckle with the connecting contact.

[0010] As a further technical scheme of the present application, the connecting contacts are uniformly arranged in at least three groups around the annular elastic members, and the annular elastic members are symmetrically arranged in at least two groups above and below the connecting contacts.

[0011] As a further technical scheme of the present application, a state detection pin is arranged on the conductive sheet of the relay, a matched state detection socket is arranged on a circuit board of the utility meter, and the state detection socket is connected with a state detection device of the utility meter.

[0012] As a further technical scheme of the present application, a temperature monitoring device is arranged on the circuit board of the utility meter, and a temperature probe of the temperature monitoring device is used to measure the temperature of the current terminal.

[0013] As a further technical scheme of the present application, a sampling element is arranged on the relay, a sampling pin is arranged on the sampling element, and a matched sampling element socket is arranged on the circuit board of the utility meter.

[0014] As a further technical scheme of the present application, a control end pin is arranged on the relay, and a matched control end socket is arranged on the circuit board of the utility meter.

[0015] The present application uses a method for replacing a relay of a utility meter with the relay convenient to replace, which comprises the following steps:

[0016] S1 information collection: the utility meter collects relay state information of the utility meter, user power consumption information and temperature information of a current terminal of the utility meter through a state detection pin, a sampling pin and a temperature probe respectively;

[0017] S2 analysis and judgment: the electric energy meter analyzes and judges the relay state information, the user power consumption information and the temperature information of the current terminal of the electric energy meter, and then obtains the problems of the relay;

[0018] S3 report and maintenance: the electric energy meter reports the fault information, and the maintenance personnel maintains or replaces the relay.

[0019] As a further technical solution of the application: in step S2, the relay state information is used to judge whether the internal logic and the actual voltage of the relay match, the user power consumption information is used to judge whether the relay specification is suitable, and the temperature information of the current terminal of the electric energy meter is used to judge whether the relay and the current terminal of the electric energy meter are in poor contact.

[0020] The technical solution provided by the application has the following beneficial effects:

[0021] The electric energy meter with replaceable relay provided by the application can replace the relay flexibly according to the actual situation, and can replace relays of different specifications, thereby enhancing the universality, saving resources and avoiding waste. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a switch built-in electric energy meter in the prior art;

[0023] Figure 2 is a structural schematic diagram of a switch external electric energy meter in the prior art;

[0024] Figure 3 is a structural schematic diagram of an electric energy meter with replaceable relay provided by the application;

[0025] Figure 4 is an interface schematic diagram of the electric energy meter with replaceable relay provided by the application;

[0026] Figure 5 is a plug structure schematic diagram;

[0027] Figure 6 is a structural schematic diagram of a current terminal;

[0028] Figure 7 is a current terminal connection schematic diagram;

[0029] Figure 8 is a structural schematic diagram of a current terminal connecting buckle;

[0030] Figure 9 is a structural schematic diagram of a connecting contact;

[0031] Figure 10 is a structural schematic diagram of a relay;

[0032] Figure 11 is a structural schematic diagram of a sampling element;

[0033] Figure 12 is a structural schematic diagram of a conductive sheet;

[0034] Figure 13 is a structural schematic diagram of a circuit board;

[0035] In the figure: 1 - electric energy meter, 11 - connector, 111 - connecting contact, 112 - spring, 1111 - conductive part, 1112 - buckling part, 12 - current terminal, 121 - current terminal connecting column, 122 - current terminal connecting buckle, 1221 - annular groove, 2 - relay, 21 - sampling element, 211 - relay connecting buckle, 2111 - annular groove, 212 - sampling pin, 22 - conductive sheet, 221 - state detection pin, 13 - circuit board, 131 - sampling socket, 132 - control end socket, 133 - temperature probe, 134 - state detection socket, 23 - control end pin, 3 - cabin, 4 - circuit breaker. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the claimed present disclosure, but only represents selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0037] As Figures 1-13 , the present disclosure provides an electric energy meter facilitating replacement of a relay, comprising a relay 2, wherein a conductive sheet 22 and a sampling element 21 are arranged on the relay 2, and the conductive sheet 22 and the sampling element 21 are detachably connected with a current terminal 12 of the electric energy meter 1 through a connector 11, and the relay 2 is arranged in a cabin 3 with a cover, and the cabin 3 is independent relative to the electric energy meter 1.

[0038] It should be noted that the electric energy meter 1 is designed according to a 100A current specification, and the electric energy meter 1 has only two specifications of 60A and 100A, i.e. 60A specification relays and 100A specification relays are arranged accordingly. Under the two specifications, the temperature limits of the current terminals of the electric energy meter after thermal stabilization (at least 20 min) are T1 and T2 respectively. In the present embodiment, the relay uses a 60A specification, and the current terminal temperature limit at this time is T1.

[0039] As a preferred embodiment of the present application: a relay connecting buckle is arranged on the current terminal 12, one end of the connector 11 is buckled and fixed on the current terminal connecting buckle 122, the other end of the connector 11 is buckled with the relay connecting buckle 211 arranged on the terminal of the relay 2, the relay connecting buckle 211 and the current terminal connecting buckle 122 are buckled on the connector 11, the connector 11 comprises a plurality of connecting contacts 111 and a ring-shaped elastic member, i.e. spring 112, arranged on the connecting contacts 111, two conductive parts 1111 are arranged on one side of the elastic member, a buckling groove 1112 is arranged between the two conductive parts 1111, the relay connecting buckle 211 and the current terminal connecting buckle 122 are provided with a ring-shaped groove 1221 which is adapted to buckle with the conductive part 1111, the tension of the ring-shaped elastic member 112 ensures that the two conductive parts 1111 on the connecting contact 111 are in contact with the relay connecting buckle 211 and the current terminal connecting buckle 122, and also ensures the firmness of the buckling of the relay connecting buckle 211 and the current terminal connecting buckle 122 with the connecting contact 111.

[0040] As a preferred embodiment of the present application: the connecting contact 111 is uniformly provided with three groups around the ring-shaped elastic member 112, and the ring-shaped elastic member 112 is symmetrically arranged in two groups about the connecting contact 111.

[0041] As a preferred embodiment of the present application: a state detection pin 221 is arranged on the conductive sheet 22 of the relay 2, and a state detection socket 134 adapted thereto is arranged on the line board 13 of the electric energy meter, the state detection socket 134 is connected with the state detection device of the electric energy meter.

[0042] As a preferred embodiment of the present application: a temperature monitoring device is arranged on the line board 13 of the electric energy meter 1, and a temperature probe 133 of the temperature monitoring device is in contact with the current terminal 12 of the electric energy meter 1.

[0043] As a preferred embodiment of the present application: a sampling element 21 is arranged on the relay 2, a sampling pin 212 is arranged on the sampling element 21, and a sampling element socket 131 adapted thereto is arranged on the line board 13 of the electric energy meter 1.

[0044] As a preferred embodiment of the present application: a control end pin 23 is arranged on the relay, and a control end socket 132 adapted thereto is arranged on the line board 13 of the electric energy meter 1.

[0045] The method for replacing the relay of the electric energy meter with the relay-replaceable electric energy meter of the present application comprises the following steps:

[0046] The relay 2 current sampling is performed at a fixed interval (3 minutes in the embodiment), the relay 2 state detection is performed at a fixed interval (3 minutes in the embodiment), and the temperature of the primary current terminal 12 is collected at a fixed interval (5 seconds in the embodiment).

[0047] The electric energy meter judges whether the power consumption exceeds the current specification 60A set in the meter for a long time (1 hour in the embodiment), judges whether the internal logic (closed or open) of the electric energy meter and the actual relay terminal voltage match, and judges whether the collected temperature of the current terminal for 12 times is greater than T1.

[0048] If the sampled current exceeds the current specification 60A set in the meter, the electric energy meter records and reports the current overcurrent event to the master station, and the master station informs the maintenance personnel to replace the 100A specification relay.

[0049] If the internal logic (closed or open) of the relay 2 and the actual relay 2 terminal voltage do not match, it means that the relay 2 has a fault, and the maintenance personnel is informed to replace the relay 2.

[0050] If the collected temperature of the current terminal 12 for 12 times is greater than T1, it is considered that the relay 2 and the current terminal 12 have a contact fault, and the master station is reported for maintenance.

[0051] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacement or change within the disclosed scope of the present application according to the technical solution and concept of the present application, which belongs to the protection scope of the present application.

Claims

1. An electric energy meter facilitating replacement of a relay, comprising a relay, characterized in that, The relay is provided with a conductive sheet and a sampling element, which are detachably connected with the current terminal of the electric energy meter through a connector, the relay is arranged outside the closed housing of the electric energy meter, the connector comprises a plurality of connecting contacts and a ring-shaped elastic component arranged on the connecting contacts, each connecting contact is provided with two conductive parts on one side in the elastic component, a buckling groove is arranged between the two conductive parts, the connecting contacts are uniformly arranged with at least three groups around the ring-shaped elastic component, and the ring-shaped elastic component is symmetrically arranged with at least two groups about the connecting contacts; the current terminal is provided with a current terminal connecting buckle, the conductive sheet and the sampling element are provided with a relay connecting buckle, and the relay connecting buckle and the current terminal connecting buckle are provided with a ring-shaped groove matched with the conductive part.

2. The electric energy meter with easy replacement of relays according to claim 1, characterized in that, Further comprising a circuit board, the conductive sheet is provided with a state detection pin, the circuit board is provided with a matched state detection socket, and the state detection socket is connected with the state detection device of the electric energy meter.

3. The electric energy meter with easy replacement of relays according to claim 2, characterized in that, The circuit board is provided with a temperature monitoring device, and a temperature probe of the temperature monitoring device is used to measure the temperature of the current terminal.

4. The electric energy meter of claim 3, wherein, The sampling element is provided with a sampling pin, and the circuit board of the electric energy meter is provided with a matched sampling element socket.

5. The electric energy meter of claim 4, wherein, The relay is provided with a control terminal pin, and the circuit board of the electric energy meter is provided with a matched control terminal socket.

6. A method of replacing the relay of the electric energy meter of claim 5, wherein, The method comprises the following steps: S1 information collection: the electric energy meter collects the relay state information, user electricity consumption information and temperature information of the current terminal of the electric energy meter through the state detection pin, the sampling pin and the temperature probe respectively; S2 analysis and judgment: the electric energy meter analyzes and judges the relay state information, user electricity consumption information and temperature information of the current terminal of the electric energy meter, and then obtains the problems of the relay; S3 reporting and maintenance: the electric energy meter reports fault information, and the maintenance personnel maintains or replaces the relay.

7. The method of replacing a relay according to claim 6, characterized in that, In the step S2, the relay state information is used to judge whether the internal logic of the relay matches the actual voltage, the user electricity consumption information is used to judge whether the relay specification is suitable, and the temperature information of the current terminal of the electric energy meter is used to judge whether the relay and the current terminal of the electric energy meter are in poor contact.

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