CN113345166B - A rail-type prepaid electric energy meter - Google Patents

Abstract

The invention relates to a guide rail type prepaid electric energy meter, which comprises a guide rail (1), a meter head (2) and several access modules (3), the meter head (2) and several access modules The modules (3) are installed in parallel on the guide rail (1) and connected in sequence, and data interaction is performed between the meter head (2) and the access module (3) and between each access module (3), and the The meter head (2) is used to buy electricity, and the access module (3) is used to realize power metering and power cut-off due to arrears. Compared with the prior art, the present invention has the advantages of modularization and high flexibility.

Description

A rail-type prepaid electric energy meter

technical field

The invention relates to the field of electric energy meters, in particular to a guide rail type prepaid electric energy meter.

Background technique

Prepaid energy is an energy meter with a prepaid function. Users must buy electricity before they can use electricity. If they do not continue to buy electricity after the electricity is used up, the meter will cut off the power and stop using electricity.

The existing prepaid energy meters are classified according to the installation method: rail type, wall-mounted type;

The wall-mounted prepaid energy meter is bulky and not suitable for centralized installation. It is mainly used in the charge management of residential buildings. The guide rail type prepaid energy meter is small in size and easy to install. It is more suitable for centralized installation and can be used in shopping malls, residential properties and other application scenarios.

With the development of power demand, the market has higher and higher requirements for centralized installation of electric meters. In addition to highly centralized installation, it also needs to be easy to install and replace.

Contents of the invention

The object of the present invention is to provide a guide rail type prepaid electric energy meter in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A guide rail type prepaid electric energy meter, characterized in that the electric energy meter includes a guide rail (1), a meter head (2) and several access modules (3), the meter head (2) and several connection modules The input modules (3) are installed in parallel on the guide rail (1) and connected sequentially, and data interaction is performed between the meter head (2) and the access modules (3) and between each access module (3), and the The meter head (2) is used to buy electricity, and the access module (3) is used to realize power metering and power cut-off due to arrears.

Preferably, the access module (3) is a direct access module, which is used to measure the electrical parameters of a three-phase circuit directly connected to one channel and the accurate measurement of power consumption, and to realize power cut-off due to arrears and over-current cut-off Function.

Preferably, the access module (3) is a transformer access module, which is used to measure the electrical parameters of the three-phase circuit connected by two transformers and the accurate measurement of power consumption, and to control the The switching value indirectly controls the circuit breaker connected with the switching value to realize the tripping function.

Preferably, the meter head (2) is connected to the access module (3) and each access module (3) through a crystal head (4).

Preferably, the meter head (2) includes a first MCU and a data storage chip respectively connected to the first MCU, a real-time clock circuit, a button circuit, a switching value input and output circuit, an infrared interface, a radio frequency interface, an RS485 interface and an Ethernet The network interface, the infrared interface and the RS485 interface are used to purchase electricity remotely, and the radio frequency interface is used to read relevant data in the radio frequency card for electricity purchase or parameter setting.

Preferably, the direct access module includes a second MCU, a first metering chip connected to the second MCU, a first sampling circuit, a first RS485 communication interface, a magnetic latching relay and a first LED indicator light.

Preferably, there are five first LED indicator lights, which respectively indicate the voltage states of A, B, and C phases, active pulses, and communication states.

Preferably, the transformer access module includes a third MCU and two second metering chips respectively connected to the third MCU, a second sampling circuit, a second RS485 communication interface, four switch outputs and a second LED light.

Preferably, there are five second LED indicator lights, which respectively indicate the power consumption status of the two households, the active pulse status of the two households and the communication status.

Preferably, the number of the access modules (3) does not exceed 12, and the guide rail (1) is a standard 35mm guide rail.

Compared with the prior art, the present invention has the following advantages:

1. The dimensions of the meter head, direct access module and transformer access module of the electric energy meter of the present invention are all 115*72*79.5, which is much smaller than that of ordinary rail-type prepaid electric energy meters.

2. The direct access module of the present invention can be used as a three-phase direct access prepaid electricity meter, and can also be used as three one-way prepaid electricity meters. One transformer connection module can be used as two three-phase transformers connected to the prepaid electricity meter.

3. The meter head of the present invention supports infrared communication, 485 communication, and radio frequency card reading and writing functions. It can purchase electricity remotely through 485, and can also purchase electricity for connected modules by swiping radio frequency cards.

4. The access module of the present invention can be any combination of a direct access module or a transformer access module.

5. The modules of the present invention are independent of each other. Any module can be directly removed from the guide rail, replaced with a new module, or added at the end, and the installation distance between the modules can also be adjusted appropriately.

Description of drawings

Fig. 1 is a structural schematic diagram of the electric energy meter of the present invention.

Among them, 1 is the guide rail, 2 is the meter head, 3 is the access module, and 4 is the crystal head.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

As shown in Figure 1, a rail-type prepaid energy meter includes a rail 1, a meter head 2 and several access modules 3, and the meter head 2 and several access modules 3 are installed in parallel on On the guide rail 1 and connected in sequence, the data interaction between the meter head 2 and the access module 3, and between each access module 3, the meter head 2 is used to buy electricity, and the access module 3 It is used to realize power metering and arrears power off.

The access module 3 is a direct access module or a transformer access module, and the direct access module is used to measure the electrical parameters of a three-phase circuit directly connected to one way and the accurate measurement of power consumption, and to realize the Power-off and over-current power-off functions; the transformer access module is used to measure the electrical parameters of the three-phase circuit connected to the two-way transformer and the accurate measurement of power consumption, and through the control switch in the case of arrears The circuit breaker connected with the switching value can be indirectly controlled to realize the tripping function.

The meter head 2 is connected to the access module 3 and each access module 3 through a crystal head 4 .

The meter head 2 includes an MCU, a data storage chip, a real-time clock circuit, a button circuit, a switch value input and output circuit, an infrared interface, a radio frequency interface, an RS485 interface and an Ethernet interface, and the described infrared interface and the RS485 interface are used for performing For remote power purchase, the radio frequency interface is used to read relevant data in the radio frequency card for power purchase or parameter setting.

The direct access module includes an MCU, a metering chip, a sampling circuit, RS485 communication, a magnetic latching relay, and an LED indicator light. There are 5 LED indicator lights, which respectively indicate the voltage states of A, B, and C phases and active pulses and communication status. It can realize the accurate measurement of the electrical parameters and power consumption of the three-phase loop directly connected to one channel, and can realize the functions of power failure due to arrears and overcurrent power failure, and can exchange data with the meter and other modules.

The transformer access module includes MCU, two metering and sampling circuits, RS485 communication, 4 switch output and LED indicator lights. There are 5 LED indicator lights, respectively indicating the power consumption status of two households, household active pulse status and communication status. It can realize the accurate measurement of the electric parameters and power consumption of the three-phase circuit connected by the two-way transformer, and can indirectly control the circuit breaker connected to the switch by controlling the switch to realize the tripping function in the case of arrears.

The number of the access modules 3 is no more than 12. The guide rail 1 is a standard 35mm guide rail.

The meter head, direct access module, and transformer access module can be installed in parallel on a standard 35mm guide rail for debugging, and the meter head and each module are connected through a crystal head for data interaction. The modules are independent of each other. Any module can be directly removed from the guide rail to replace a new module. A new module can also be added at the end and connected to the original last module with a crystal head. The installation distance between modules It can also be adjusted appropriately.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the present invention. Modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (7)

1. A rail-type prepaid electric energy meter is characterized in that the electric energy meter comprises a guide rail (1), a meter head (2) and several access modules (3), and the meter head (2) and several The two access modules (3) are installed in parallel on the guide rail (1) and connected sequentially, and data interaction is performed between the meter head (2) and the access modules (3) and between each access module (3), The meter head (2) is used to buy electricity, and the access module (3) is used to realize electricity metering and power off due to arrears; The access module (3) is a transformer access module, which is used to measure the electrical parameters of the three-phase circuit connected by the two transformers and the accurate measurement of power consumption, and indirectly through the control of the switching value in the case of arrears. Control the circuit breaker connected with the switch to realize the tripping function; the transformer access module includes the third MCU and two second metering chips respectively connected with the third MCU, the second sampling circuit, and the second RS485 communication interface , four-way switch output and the second LED indicator light; the direct access module can be used as a three-phase direct access prepaid meter, or as three one-way prepaid meters; a transformer access module can be used as two A three-phase sensor connected to the prepaid meter for use; The meter head, direct access module, and transformer access module can be installed in parallel on a standard 35mm rail for debugging. The meter head and each module are connected through a crystal head for data interaction. The modules are independent of each other. Any module It can be directly removed from the guide rail and replaced with a new module, or a new module can be added at the end, and connected to the original last module with a crystal head, and the installation distance between the modules can be adjusted appropriately. 2. A kind of rail-type prepaid electric energy meter according to claim 1, characterized in that, the access module (3) is a direct access module for measuring the electrical parameters of a three-phase circuit directly connected to one way And accurate measurement of electricity consumption, and realize the functions of power failure due to arrears and overcurrent power failure. 3. A kind of guide rail type prepaid electric energy meter according to claim 1, it is characterized in that, described meter head (2) comprises the first MCU and the data memory chip that is respectively connected with the first MCU, real-time clock circuit, Button circuit, switch value input and output circuit, infrared interface, radio frequency interface, RS485 interface and Ethernet interface, the infrared interface and RS485 interface are used for remote purchase of electricity, and the radio frequency interface is used for reading the relevant information in the radio frequency card. Data for power purchase or parameter setting. 4. A rail-type prepaid electric energy meter according to claim 2, wherein the direct access module includes a second MCU and a first metering chip and a first sampling circuit respectively connected to the second MCU , the first RS485 communication interface, the magnetic latching relay and the first LED indicator light. 5. A rail-type prepaid electric energy meter according to claim 4, characterized in that there are five first LED indicator lights, which respectively indicate the voltage states of A, B, and C phases, active pulses, and communication states . 6. A rail-type prepaid electric energy meter according to claim 1, characterized in that there are five second LED indicator lights, which respectively indicate the power consumption status of two households, the active pulse status of two households and the communication status . 7. A rail-type prepaid electric energy meter according to claim 1, characterized in that the number of said access modules (3) does not exceed 12, and said rail (1) is a standard 35mm rail.