CN114188193A

CN114188193A - Strong and weak electricity disconnect-type upper and lower structure circuit breaker

Info

Publication number: CN114188193A
Application number: CN202111571961.4A
Authority: CN
Inventors: 李佳诺; 张晓芳; 黄磊
Original assignee: Hubei Tengming Intelligent Electric Co ltd
Current assignee: Hubei Tengming Intelligent Electric Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-03-15

Abstract

The present invention is a circuit breaker with a strong and weak current separation type upper and lower structure, comprising a casing, an incoming terminal, an outgoing terminal, a static contact plate, a moving contact, an electromagnetic system and an operating mechanism, and the casing is provided with side plates on both sides. The incoming terminal and the outgoing terminal are distributed at both ends of the housing, and the incoming terminal is connected in series with the static contact plate, the moving contact, and the electromagnetic system in sequence to form a conductive circuit with the outgoing terminal; the operating mechanism controls the static contact plate and the dynamic contact. The contacts are opened and closed to realize the on-off of the conductive circuit; the bottom of the housing is provided with an insulating baffle, a weak current compartment is arranged under the insulating baffle, the weak current compartment is provided with a circuit board, and one side of the insulating baffle is arranged A power taking port, the circuit board is provided with a power taking extension portion extending upward from the power taking port, the power taking extension portion is electrically connected with the conductive circuit, and electronic components are connected and arranged on the circuit board. The invention effectively avoids the influence of strong electricity on weak electricity, and provides reliable guarantee for the function and safety of the electronic circuit.

Description

Strong and weak electricity disconnect-type upper and lower structure circuit breaker

Technical Field

The invention relates to the field of circuit breakers, in particular to a circuit breaker with a strong and weak current separated upper and lower structure.

Background

The electric power thing networking and the intelligent electric power distribution are present electric power system development trend, and the miniature circuit breaker that terminal distribution used all is the mechanical type product of modulus usually, and small space is not enough, can't install intelligent electronic component, and there are two kinds at present way, firstly install electronic intelligent part in the space of adding one utmost point or half utmost point beside a utmost point circuit breaker, and the other kind is the volume that increases a utmost point circuit breaker, arranges electronic circuit in the space between a utmost point circuit breaker mechanical mechanism and circuit.

The two approaches of the prior art have the following problems for use and product production: the product volume is large, so that under the requirement of the same power utilization loop of a user, if the intelligent circuit breaker is replaced and installed, the space of the distribution box needs to be increased, the workload is increased, the building structure of the user is damaged, and the cost is increased; the strong and weak current lines are mixed in a small space in a crossed mode, the production process of the product is complex, the production efficiency is low, automatic assembly cannot be achieved, the mechanical and electronic connection mode mostly uses a wire power taking mode, the wire is thin, the wire breaking risk exists after welding, the wire needs to be arranged in the assembly process, and the wire is pulled in the assembly process to enable the wire to be broken and broken, so that the unsafe risk exists.

Disclosure of Invention

In order to solve the defects of the prior art of the breaker, the invention provides the breaker with the strong and weak electricity separated upper and lower structures, under the condition of not changing the size of the short-circuiting device, the mechanical structure and the electronic components in the breaker are separately arranged, so that the influence of strong electricity on weak electricity is effectively avoided, and the function and the safety of an electronic circuit are reliably guaranteed.

The invention is realized by the following technical scheme:

a strong and weak electricity separation type upper and lower structure circuit breaker comprises a shell, incoming line terminals, outgoing line terminals, a static touch plate, a moving contact, an electromagnetic system and an operating mechanism, wherein side plates are arranged on two sides of the shell; the operating mechanism controls the static contact plate and the moving contact to be separated and combined so as to realize the on-off of the conductive loop; the shell is characterized in that an insulating partition plate is arranged at the bottom of the shell, a weak current bin is arranged below the insulating partition plate and provided with a circuit board, a power taking opening is formed in one side of the insulating partition plate, a power taking extending portion extending upwards from the power taking opening is arranged on the circuit board and electrically connected with a conductive loop, and an electronic element is connected and arranged on the circuit board.

Further, the static contact plate is fixedly connected to the insulating partition plate, a power taking port is arranged on one side, located on the static contact plate, of the insulating partition plate, and at least three power taking points are arranged on the static contact plate.

Furthermore, a leakage mutual inductor is connected to a wire connected between the outgoing line terminal and the moving contact, and a power taking point is arranged on the leakage mutual inductor.

Furthermore, the power taking point is a mechanical contact pin, and a jack is arranged at the position of the corresponding circuit board.

Furthermore, the wiring terminal is fixedly installed on an insulating wiring seat, a thermocouple is arranged in the insulating wiring seat, and two output ends of the thermocouple penetrate through the insulating partition plate and are connected to the circuit board.

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

(1) the overall dimension of this circuit breaker is the same with conventional circuit breaker, does not need additionally to increase the light current part, can realize changing with conventional circuit breaker one to five at most, and the user need not to increase the block terminal size under the prerequisite that keeps the same electric return circuit, reduces electric intelligent installation work load and cost.

(2) The mechanical structure and the cavity of the electronic component are independently separated, the electric arc generated by the mechanical structure when the large current is switched on and off cannot influence the electronic part, the influence of the strong current on the weak current is effectively avoided, and the function and the safety of an electronic circuit are reliably guaranteed;

(3) because the mechanical mechanism and the electronic part are separated, the mechanical mechanism and the electronic part can be separately produced and sequentially installed, the production process is simplified, automatic assembly and soldering are realized, and the production working hour cost is reduced;

(4) the plug pin type electricity taking mode is adopted, the fusing risk of taking electricity by the electric wire is avoided, the connection mode is simple in production process, the connection is reliable, and automatic production can be realized.

Drawings

Fig. 1 is a schematic diagram of an N-pole front view structure of a preferred embodiment of a circuit breaker with a strong and weak current separation type upper and lower structure according to the present invention;

fig. 2 is a schematic diagram of an L-pole front view structure of a preferred embodiment of a circuit breaker with a strong and weak current separation type upper and lower structure.

The reference numbers are as follows:

1. an insulating spacer; 2. a stationary contact plate; 3. a moving contact; 4. an electromagnetic system; 5. an incoming terminal; 6. an outlet terminal; 7. an arc extinguishing system; 8. a weak current cabin; 9. a circuit board; 10. taking the electricity for the extension part; 11. a power taking port; 12. a housing; 13. mechanically inserting a pin; 14. a power taking socket; 15. a leakage transformer; 16. a thermocouple; 17. an insulated wire holder; 18. an operating mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following further describes embodiments of the present invention with reference to the drawings.

A strong and weak electricity separation type upper and lower structure circuit breaker comprises a shell 12, a wire inlet terminal 5, a wire outlet terminal 6, a static contact plate 2, a moving contact 3, an electromagnetic system 4 and an operating mechanism 18, wherein two sides of the shell 12 are provided with side plates, the wire inlet terminal 5 and the wire outlet terminal 6 are distributed at two ends of the shell 12, and the wire inlet terminal 5 is sequentially connected with the static contact plate 2, the moving contact 3 and the electromagnetic system 4 in series and then connected with the wire outlet terminal 6 in series to form a conductive loop; the operating mechanism 18 controls the static contact plate 2 and the moving contact 3 to be separated and combined so as to realize the on-off of the conductive loop; the bottom of the shell 12 is provided with an insulating partition plate 1, a weak electricity bin 8 is arranged below the insulating partition plate 1, the weak electricity bin 8 is provided with a circuit board 9, an electricity taking port 11 is arranged on one side of the insulating partition plate 1, the circuit board 9 is provided with an electricity taking extension portion 10 extending upwards from the electricity taking port 11, the electricity taking extension portion 10 is electrically connected with a conductive loop, and an electronic element is arranged on the circuit board 9 in a connecting mode. The basic assembly of the circuit breaker can be referred to in the prior art. The selected electronic components can be selected according to actual needs and are intensively arranged in the weak current cabin 8 according to a conventional wiring principle. The mechanical structure part is generally also provided with an arc extinguishing system 7.

In a preferred embodiment of the present invention, a bipolar double-break circuit breaker is taken as an example, and the circuit breaker is generally used for a double-break structure of a live wire and a zero wire of alternating current, so that power needs to be taken from an L pole and an N pole simultaneously. As shown in fig. 1 and 2, an insulating partition plate 1 is arranged at the bottom of a shell 12 of the structure, the upper half part of the insulating partition plate 1 is a mechanical mechanism part of a bipolar double-breakpoint circuit breaker, as shown in fig. 1, two conductive loops which are not communicated with each other are arranged in the shell 12, one conductive loop is a live line loop (L pole), and the other conductive loop is a zero line loop (N pole); correspondingly, two sets of corresponding connecting terminals are arranged at two ends of the shell 12 and respectively correspond to the two conductive loops, and two sets of static contact plates 2 and two sets of movable contact plates 3 are also respectively arranged and are staggered with each other, and the on-off of the static contact plates and the movable contact plates is controlled by the same operating mechanism 18. The circuit board 9 is arranged on one side of the live wire loop, an extending part is upwards arranged on the static contact plate 2 of the live wire loop, and an electricity taking socket 14 is arranged on the extending part. The electricity of the L utmost point is got on stationary contact plate 2 in live wire return circuit, and stationary contact plate 2 is the U-shaped shell fragment, and the first half of U-shaped shell fragment is as the contact of stationary contact plate 2 with moving contact 3, and the latter half fixed connection is on insulating barrier 1, and the outside of the latter half is provided with three bellied mechanical contact pin 13 side by side, and this mechanical contact pin 13 welds with circuit board 9, as the getting electric point of the L utmost point for the current and voltage sampling of the L utmost point. Because the static touch panel 2 and the moving contact 3 of two return circuits set up with staggering, the position that the static touch panel 2 of L utmost point corresponds is the fixed connection point of moving contact 3 one side of the N utmost point, and this point is through copper sheet or wire fixed connection on getting electric seat, gets electric seat bottom and leads to the other end and circuit board 9 through getting the electric terminal, gets electric terminal end and is provided with a mechanical contact pin 13 and circuit board 9 welding, as the getting electric point of the N utmost point.

In this embodiment, the electricity taking point of the L utmost point and the N utmost point generally all is located the normally closed end that circuit breaker and power are connected, and this side binding post is for advancing the electric end promptly, and the binding post of the circuit breaker other end is for going out the electric end, under the general condition, still need set up electric leakage transformer 15 on the wire that circuit breaker inner loop and play electric end binding post are connected, also be provided with two electric leakages on electric leakage transformer 15 and get the electricity point, electric leakage transformer 15 department has the extension end that is provided with circuit board 9, electric leakage transformer 15's electric leakage is got the electricity spot and is welded on circuit board 9. When the breaker is in a disconnected state, the leakage transformer 15 generates an induced current, which indicates that the breaker has leakage or breakdown and needs to be replaced in time, and the principle and the installation mode of the leakage transformer 15 can refer to the prior art.

In this embodiment, as shown in fig. 1, the connection terminal is fixedly mounted on an insulating connection base 17, a thermocouple 16 is disposed in the insulating connection base 17, and two output ends of the thermocouple 16 penetrate through the insulating partition plate 1 and then are connected to the circuit board 9 through mechanical pins 13. The thermocouple 16 is used to detect if there is a problem with the terminal connection and if the wiring torque is not sufficient, the temperature will rise.

In this embodiment, the insulating partition board 1 is placed with the breaker mechanism on the upper part and the electronic components on the lower part. The two parts are independently produced, and finally, the welding connection points are assembled. Because the mechanical and electronic cavities are independently separated, the electric arc generated by the mechanical structure when the large current is switched on and off cannot influence the electronic part, the influence of the strong current on the weak current is effectively avoided, and the function and the safety of an electronic circuit are reliably guaranteed. During assembly, the mechanical mechanism of the circuit breaker with the upper cavity is installed, the side plate is covered, then the circuit board 9 is installed on the lower cavity, the power taking extending portion 10 of the circuit board 9 extends into the power taking port 11, the circuit board 9 is soldered after the hole is aligned with the mechanical pin 13, the two portions are firmly connected together, and an electric signal is provided for the circuit board 9.

In another preferred embodiment of the present invention, a single-pole double-break-point circuit breaker is taken as an example, and since the single-pole double-break-point circuit breaker has only one loop, no N-pole power supply exists. Generally, three protrusions are arranged on a static contact connected with a power inlet end and welded with a circuit board 9 to serve as current and voltage sampling points, and a leakage transformer 15 is arranged on a lead of the power outlet end.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A circuit breaker with a strong and weak current separation type upper and lower structure, comprising a casing, an incoming terminal, an outgoing terminal, a static contact plate, a moving contact, an electromagnetic system and an operating mechanism, the casing has side plates on both sides, so the The incoming terminal and the outgoing terminal are distributed at both ends of the housing, and the incoming terminal is connected in series with the static contact plate, the moving contact, and the electromagnetic system in sequence to form a conductive circuit with the outgoing terminal; the operating mechanism controls the static contact plate and the dynamic contact. The contacts are opened and closed to realize the on-off of the conductive circuit; it is characterized in that an insulating baffle is arranged at the bottom of the casing, a weak current compartment is arranged under the insulating baffle, and a circuit board is arranged in the weak current compartment, and the insulating baffle is arranged One side of the separator is provided with a power taking port, the circuit board is provided with a power taking extension extending upward from the power taking port, the power taking extension is electrically connected with the conductive circuit, and electronic components are connected to the circuit board.

2 . The strong and weak current separation type upper and lower structure circuit breaker according to claim 1 , wherein the static contact plate is fixedly connected to the insulating baffle plate, and the insulating baffle plate is located on the side of the static contact plate. 3 . One side is provided with a power-taking port, and at least three power-taking points are set on the static contact plate.

3 . A type of upper and lower structure circuit breaker with strong and weak current separation according to claim 1 , wherein a leakage current transformer is connected to the wire connecting the outgoing terminal and the moving contact, and the leakage current mutual inductance is arranged. 4 . There is a power take-off point on the device.

4 . The circuit breaker with a strong and weak current separation type upper and lower structure according to claim 2 or 3 , wherein the power taking point is a mechanical pin, and the corresponding circuit board position is provided with a jack. 5 .

5 . The high and weak current separation type upper and lower structure circuit breaker according to claim 1 , wherein the connection terminal is fixedly installed on an insulating connection seat, and a thermocouple is arranged in the insulating connection seat. 6 . The two output ends of the thermocouple are connected to the circuit board through the insulating spacer.