CN110601006A - Hot plug type digital power distribution terminal - Google Patents

Abstract

The invention provides a hot-plug type digital power distribution terminal which comprises a power distribution terminal main body and a base, wherein the power distribution terminal main body comprises a main control module, and the main control module comprises an operational amplifier unit, a CPU unit, a communication unit, a power supply unit and a first connector; the base comprises a base module, and the base module comprises a second connector, a voltage sampling circuit, a current sampling circuit and a terminal; the first connector on the power distribution terminal main body is connected with the second connector on the base, and the strong current and the weak current of the base module are separately designed, so that the hot plugging of the digital power distribution terminal is realized; the installation of digital distribution terminal main part is maintained conveniently, when distribution terminal breaks down, can directly change, need not cut off power supply to switch board drawer switch major loop, reduces the maintenance cost, reduces the probability that other inside connecting terminal of switch unit are not hard up, drop, avoids operating personnel to electrocute, has improved work efficiency.

Description

A hot-swappable digital power distribution terminal

technical field

The invention belongs to the technical field of high and low voltage power distribution equipment, and in particular relates to a hot-swappable digital power distribution terminal.

Background technique

At present, digital power distribution terminals are installed on the panels of some power distribution cabinets or power distribution boxes, as well as on the panels of drawer switch units in power distribution cabinets, which can comprehensively check the residual current, voltage, voltage, etc. The power parameters such as current, electric energy and temperature are monitored and indicated, and they play the role of human-computer interaction. At present, digital power distribution terminals are developing in the direction of digitization, integration, intelligence and light weight. The existing digital power distribution terminals have complex installation structures in the power distribution system and poor maintainability. They need to be disconnected before installation and disassembly. Only by turning on the power supply and opening the front panel of the switch unit of the power distribution cabinet, can the connecting wires of the digital power distribution terminal be connected and pulled out. This operation method is not convenient for the operator to install and replace on site, and it is easy to cause other connection terminals inside the switch unit to loosen. , falling off, causing the power distribution cabinet to work abnormally, and opening the switch unit for operation at the same time, the operator is in danger of electric shock.

The hot-swappable digital power distribution terminal disclosed in the Chinese Patent Application Publication (Application No. 201910382226.5, 201910382227.X, 201920655451.7, 201920655095.9) proposes the design idea of the hot-swappable digital power distribution terminal, which solves the problem to a certain extent. The existing digital power distribution terminal is inconvenient to maintain, but there is still a certain risk of hot swapping safety. When the power distribution cabinet or power distribution box is plugged and unplugged, the connection terminal interface involves strong current and live power. The problem of plugging and unplugging, the division of strong and weak electricity is not complete, and the security is not high enough, which is easy to cause the burning of digital power distribution terminals.

Therefore, it is necessary to develop a new type of hot-swappable digital power distribution terminal, which can safely connect the digital power distribution terminal without opening the front panel of the switch unit and the power distribution cabinet or distribution box is live. The main body is installed and removed. The new digital power distribution terminal can solve this problem. It can be quickly disassembled and assembled during on-site installation and maintenance, which can improve work efficiency, reduce the probability of loosening and falling off of other connecting terminals inside the switch unit, and avoid electric shocks for operators.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the defects in the prior art, and to provide a hot-swappable digital power distribution terminal, which realizes the separation design of strong and weak currents between the main body of the power distribution terminal and the base, and can be used in a power distribution cabinet/distribution box. The main body of the digital power distribution terminal can be quickly installed and dismantled when it is live, and it will not cause damage to the power distribution cabinet/distribution box. Users are increasingly demanding power distribution.

In order to achieve the above object, an embodiment of the present invention provides a hot-swappable digital power distribution terminal, including a power distribution terminal body and a base, the power distribution terminal body is provided with a first connector, and the base is There is a second connector on it, the first connector and the second connector are connected, and the connection signals of the first connector and the second connector are weak current signals, realizing a digital power distribution terminal The main body and the base are hot-swapped, avoiding the occurrence of electric shock accidents and device burning; the main body of the power distribution terminal includes a main control module, and the main control module includes an operational amplifier unit, a CPU unit, a communication unit, a power supply unit and a third a connector; the first connector is electrically connected to the operational amplifier unit, the CPU unit, the communication unit, and the power supply unit; the CPU unit is electrically connected to the operational amplifier unit, the communication unit, and the power supply unit; the power supply unit is electrically connected to the The operational amplifier unit, the CPU unit, and the communication unit are electrically connected; the base includes a base module, and the base module includes a voltage sampling circuit, a current sampling circuit, a second connector, and a terminal, the voltage sampling circuit and the The current sampling circuit is electrically connected with the second connector and the terminal respectively.

In the above-mentioned hot-swappable digital power distribution terminal, the voltage sampling circuit includes a voltage transformer and a sampling resistor, and the voltage sampling circuit converts the voltage signal input from the terminal into a low-voltage signal and then passes through the first connector and the first connector. Two connectors are connected to the op amp unit.

In the above-mentioned hot-swappable digital power distribution terminal, the current sampling circuit includes a current transformer and a sampling resistor, and the current sampling circuit converts the current signal input from the terminal into a weak current signal through the first connector and the second signal. Two connectors are connected to the op amp unit.

In the above hot-swappable digital power distribution terminal, the communication unit adopts at least one of RS485 communication unit, RS232 communication unit, CAN communication unit, and ZigBee wireless communication unit.

In the above hot-swappable digital power distribution terminal, the terminal and the second connector are electrically connected, and the terminal includes a current interface, a voltage interface, a temperature interface, a power interface, an RS485 bus interface, a CAN bus interface, an auxiliary At least one of the contact interface, the shunt release interface, the electric operating mechanism interface, the cascade control interface, and the pulse output interface of the meter chip.

Preferably, the main body of the power distribution terminal further comprises a display screen, and the display screen is electrically connected with the CPU unit, the communication unit and the power supply unit.

The invention relates to a hot-swappable digital power distribution terminal. The separation design realizes the hot swap of the main body of the digital power distribution terminal; the main body of the digital power distribution terminal is easy to install and maintain. When the power distribution terminal fails, it can be replaced directly without powering off the power distribution cabinet or the main circuit of the power distribution box. , reduce the maintenance cost, do not affect the user's electricity consumption, improve the work efficiency, reduce the probability of other connecting terminals in the switch unit being loose and falling off, and avoid electric shocks for operators.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, rather than limit the present invention. .

FIG. 1 is a schematic block diagram of a hot-swappable digital power distribution terminal according to Embodiment 1 of the present invention;

FIG. 2 is a schematic block diagram of the principle of a hot-swappable digital power distribution terminal according to Embodiment 2 of the present invention;

FIG. 3 is a schematic front view of the main body structure diagram of the hot-swappable digital power distribution terminal provided in Embodiment 1 of the present invention;

FIG. 4 is a bottom schematic diagram of a main structure diagram of a hot-swappable digital power distribution terminal provided in Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a front structure of a hot-swappable digital power distribution terminal base according to Embodiment 1 of the present invention;

6 is a schematic bottom view of the structure of a hot-swappable digital power distribution terminal base provided in Embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of the definition of the core wires of the first connector and the second connector of the hot-pluggable digital power distribution terminal according to Embodiment 1 of the present invention;

8 is a schematic diagram of a schematic diagram of a CPU unit of a hot-swappable digital power distribution terminal provided in Embodiment 1 of the present invention;

9 is a schematic diagram of a schematic diagram of a current sampling circuit of a hot-swappable digital power distribution terminal base module according to Embodiment 1 of the present invention;

FIG. 10 is a schematic diagram of a schematic diagram of a voltage sampling circuit of a hot-swappable digital power distribution terminal base module according to Embodiment 1 of the present invention.

In the picture:

1. Power distribution terminal body; 11. Main control module; 12. Operational amplifier unit; 13. CPU unit; 14. Communication unit; 15. Power supply unit; 16. First connector; 17. Display screen; 2. Base 21, the second connector; 22, the base module; 23, the voltage sampling circuit; 24, the current sampling circuit; 25, the terminal.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in this disclosure, "comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. In the embodiment, the "up", "down", "left", "right" positions of the described object in the display terminal are only used to represent the relative positional relationship. When the absolute position of the described object in the embodiment changes, the The relative positional relationship may also change accordingly.

The hot-pluggable digital power distribution terminal according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

FIG. 1 shows a schematic block diagram of a hot-pluggable digital power distribution terminal according to Embodiment 1 of the present invention; the hot-pluggable digital power distribution terminal includes a power distribution terminal main body 1 and a base 2. The power distribution terminal The main body 1 is provided with a first connector 16, the base is provided with a second connector 21, the first connector 16 and the second connector 21 are connected, FIG. 7 shows the implementation of the present invention Example 1 provides a schematic diagram of the definition of the core wires of the first connector and the second connector of the hot-pluggable digital power distribution terminal. The connection signals of the first connector 16 and the second connector 21 are both weak current signals, so The hot swap of the main body 1 of the digital power distribution terminal and the base 2 is realized, avoiding the occurrence of electric shock accidents and device burning. Fig. 4 is a schematic diagram of the front side of the figure, Fig. 4 is a schematic diagram of the bottom side of the main body structure of the hot-pluggable digital power distribution terminal provided by Embodiment 1 of the present invention, and Fig. 5 is a schematic diagram of the bottom side of the hot-pluggable digital power distribution terminal provided by Embodiment 1 of the present invention. A schematic diagram of the front structure of the electrical terminal base, FIG. 6 shows a schematic bottom view of the structure of the hot-swappable digital power distribution terminal base provided in Embodiment 1 of the present invention; the power distribution terminal main body 1 includes a main control module 11, The main control module 11 includes an operational amplifier unit 12 , a CPU unit 13 , a communication unit 14 , a power supply unit 15 and a first connector 16 .

The first connector 16 is electrically connected with the operational amplifier unit 12, the CPU unit 13, the communication unit 14, and the power supply unit 15, and is used for inputting and outputting control signals and sampling signals.

The CPU unit 13 is electrically connected with the operational amplifier unit 12, the communication unit 14 and the power supply unit 15; the AD sampling port of the CPU unit 13 is connected with the operational amplifier unit 12, and is connected with the communication unit 14 through the UART serial port of the CPU unit 13, The power supply unit 15 supplies power to the CPU unit by converting the 24V power supply into 5V and 3.3V. FIG. 8 shows a schematic diagram of the CPU unit of the hot-swappable digital power distribution terminal provided in Embodiment 1 of the present invention.

The power supply unit 15 is electrically connected with the operational amplifier unit 12 , the CPU unit 13 and the communication unit 14 to provide power supply for the above-mentioned units.

The base 2 includes a base module 22, the base module 22 includes a voltage sampling circuit 23, a current sampling circuit 24, a second connector 21, a terminal 25, the voltage sampling circuit 23 and the current sampling circuit 24 They are electrically connected to the second connector 21 and the terminal 25 respectively; the voltage sampling circuit 23 and the current sampling circuit 24 convert the strong electric signal provided from the terminal 25 into a weak electric signal and output it to the main body of the power distribution terminal through the second connector 21 1.

The hot-pluggable digital power distribution terminal provided in the first embodiment further includes a display screen 17 , and the display screen 17 is electrically connected with the CPU unit 13 , the communication unit 14 , and the power supply unit 15 .

In the above-mentioned hot-swappable digital power distribution terminal, the voltage sampling circuit 23 includes a voltage transformer and a sampling resistor. The connector 16 and the second connector 21 are connected to the operational amplifier unit 12 .

Fig. 10 shows a schematic diagram of the voltage sampling circuit of the hot-pluggable digital power distribution terminal base module provided in the first embodiment of the present invention. The voltage signal is converted into a mV-level voltage signal by the voltage transformer HPT225A-G and is input to the The amplification unit 12 performs filtering and amplification processing.

In the above-mentioned hot-swappable digital power distribution terminal, the current sampling circuit 24 includes a current transformer and a sampling resistor, and the current sampling circuit 24 converts the current signal input from the terminal into a weak current signal through the first connector. 16 and the second connector 21 are connected to the operational amplifier unit 12 .

Fig. 9 shows a schematic diagram of the current sampling circuit of the hot-swappable digital power distribution terminal base module provided in the first embodiment of the present invention, and the input current signal is converted into a mV-level voltage signal by the current transformer HCT226HJZ, which is input to the The operational amplifier unit 12 performs filtering and amplification processing.

In the above hot-swappable digital power distribution terminal, the communication unit 14 adopts at least one of an RS485 communication unit, an RS232 communication unit, a CAN communication unit, and a ZigBee wireless communication unit.

In the above hot-swappable digital power distribution terminal, the terminal 25 is electrically connected to the second connector 21, and the terminal 25 includes a current interface, a voltage interface, a temperature interface, a power interface, an RS485 bus interface, and a CAN bus. At least one of the interface, the auxiliary contact interface, the shunt release interface, the electric operating mechanism interface, the cascade control interface, and the pulse output interface of the meter chip.

Embodiment 2

2 shows a schematic block diagram of a hot-swappable digital power distribution terminal provided by Embodiment 2 of the present invention. Except for the following technical solutions, the others are the same as Embodiment 1:

The second embodiment does not include the display screen 17, and correspondingly lacks the connection between the display screen 17 and the CPU unit 13, the communication unit 14, and the power supply unit 15; the embodiment of the present invention is connected with other digital power distribution terminals through the RS485 bus interface to realize multiple Digital power distribution terminals share one display screen, which reduces the number of display screens and effectively reduces production costs.

In the hot-pluggable digital power distribution terminal provided by the embodiment of the present invention, the operational amplifier unit 12 , the CPU unit 13 , the communication unit 14 , and the power supply unit 15 all adopt the prior art, and the above-mentioned units can be performed according to the description in the embodiment. Upgrade or replace for a similar digital distribution terminal.

Compared with the prior art, the hot-swappable digital power distribution terminal has a simple structure and reasonable design. By connecting the first connector on the power distribution terminal main body and the second connector on the base, the The strong and weak currents are separated and designed to realize hot swapping; the main body of the digital power distribution terminal is easy to install and maintain. When the power distribution terminal fails, it can be replaced directly without powering off the main circuit of the drawer switch of the power distribution cabinet, reducing maintenance costs. , and control the fault range inside the terminal, which does not affect the user's power consumption, improves the work efficiency, reduces the probability of other connecting terminals in the switch unit being loose and falling off, and avoids electric shocks for operators.

The following points need to be noted:

(1) Unless otherwise defined, in the embodiments of the present invention and the drawings, the same reference numerals represent the same meaning.

(2) The accompanying drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures may refer to general designs.

(3) For the sake of clarity, in the drawings for describing the embodiments of the present invention, some structures in the drawings may be enlarged or reduced, that is, the drawings are not drawn in actual scale.

(4) The embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments without conflict.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included 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 (6)

1. The hot-plug type digital power distribution terminal is characterized by comprising a power distribution terminal main body (1) and a base (2), wherein a first connector (16) is arranged on the power distribution terminal main body (1), a second connector (21) is arranged on the base (2), and the first connector (16) is connected with the second connector (21); the power distribution terminal main body (1) comprises a main control module (11), wherein the main control module (11) comprises an operational amplifier unit (12), a CPU unit (13), a communication unit (14), a power supply unit (15) and a first connector (16); the first connector (16) is electrically connected with the operational amplifier unit (12), the CPU unit (13), the communication unit (14) and the power supply unit (15); the CPU unit (13) is electrically connected with the operational amplifier unit (12), the communication unit (14) and the power supply unit (15); the power supply unit (15) is electrically connected with the operational amplifier unit (12), the CPU unit (13) and the communication unit (14); the base (2) comprises a base module (22), the base module (22) comprises a voltage sampling circuit (23), a current sampling circuit (24), a second connector (21) and a terminal (25), and the voltage sampling circuit (23) and the current sampling circuit (24) are electrically connected with the second connector (21) and the terminal (25) respectively.

2. A hot-pluggable digital power distribution terminal according to claim 1, wherein the voltage sampling circuit (23) comprises a voltage transformer and a sampling resistor, and the voltage sampling circuit (23) converts the voltage signal inputted from the terminal (25) and connects the operational amplifier unit (12) through the second connector (21) and the first connector (16).

3. A hot-pluggable digital power distribution terminal according to claim 1, wherein the current sampling circuit (24) comprises a current transformer and a sampling resistor, and the current sampling circuit (24) converts the current signal inputted from the terminal (25) and connects the operational amplifier unit (12) through the second connector (21) and the first connector (16).

4. A hot-pluggable digital power distribution terminal according to any one of claims 1 to 3, wherein the communication unit (14) adopts at least one of an RS485 communication unit, an RS232 communication unit, a CAN communication unit and a ZigBee wireless communication unit.

5. A hot-pluggable digital power distribution terminal according to claim 4, wherein the terminal (25) is electrically connected with the second connector (21), and the terminal (25) comprises at least one of a current interface, a voltage interface, a temperature interface, a power interface, an RS485 bus interface, a CAN bus interface, an auxiliary contact interface, a shunt release interface, an electric operating mechanism interface, a cascade control interface, and an electric meter chip pulse output interface.

6. A hot-pluggable digital power distribution terminal according to claim 5, wherein the power distribution terminal body (1) further comprises a display screen (17), and the display screen (17) is electrically connected with the CPU unit (13), the communication unit (14) and the power supply unit (15).