CN209880515U - Internal series structure of high-voltage direct-current molded case circuit breaker - Google Patents

Abstract

The utility model discloses an internal series structure of a high-voltage direct-current molded case circuit breaker, which comprises a circuit breaker body, wherein the circuit breaker body is provided with a static contact, a static contact mounting screw, a moving contact, a rotating shaft, a flexible connection connecting plate, a wiring board, a conductor connecting plate, a switch button, a series conductor, the static contact is matched with the moving contact to switch on a circuit and break the circuit, the static contact mounting screw is used for fixing the static contact on a fixed seat, the moving contact is arranged above the static contact, the moving contact is fixed on the rotating shaft and can be used for fixing the moving contact, so that the synchronism is ensured when each moving contact is opened, the flexible connecting plate is used for connecting the series conductor and the moving contact, the series conductor is used for the series function of a B phase and a C phase, the utility model discloses an internal series, high safety, convenient use and strong popularization.

Description

Internal series structure of high-voltage direct-current molded case circuit breaker

Technical Field

The utility model relates to a low-voltage circuit breaker technical field especially relates to a high voltage direct current moulded case circuit breaker's inside series structure.

Background

With the planning of new energy application in the country, new energy has been one of the emerging industries that have attracted attention in China or even in the world in recent years, new energy application technology has been developed at a high speed, and simultaneously higher requirements are provided for low-voltage electrical components applied thereto, some conventional products cannot meet the use requirements, and especially with the continuous expansion of the scale of a solar photovoltaic power plant, the performance index requirements of an electrical protection component direct current plastic-shell circuit breaker are continuously improved, for example, in a photovoltaic power supply direct current system, the working voltage of a power generation system is higher and higher, the working voltage is usually 1000 volts direct current, and with the technical development, the requirement of the working voltage reaches 1500 volts direct current. At present, a plurality of plastic case direct current manufacturers at home improve the breaking performance of the circuit breaker at high voltage through a multi-breakpoint series connection wiring mode, so that a plurality of photovoltaic power generation manufacturers at home and abroad propose various wiring schemes of the circuit breaker, but the breaking voltage of the series connection mode at present can only meet the use requirement of direct current at 1250V, but no better solution is provided for a photovoltaic direct current power generation system with direct current at 1500V, and meanwhile, the existing series connection mode has some defects through practice proof of mass use, such as multiple series connection parts with complex structures and large internal resistance, and the power consumption of the circuit breaker is large during use; secondly, 4-pole conventional circuit breakers are connected in series to form a large occupied space, the insulation effect of the conventional circuit breakers cannot meet the standard requirement, the highest breaking voltage of the conventional series connection mode can only meet the use requirement of direct current at 1250V, a better solution is not provided for a photovoltaic direct current power generation system with direct current at 1500V, and meanwhile, the conventional series connection mode has some defects through practice verification of large use, such as multiple series connection parts with complex structures and large internal resistance and large power consumption of the circuit breakers during use; secondly, 4-pole conventional circuit breakers are connected in series to form a high-voltage direct-current circuit breaker which occupies a large space, cannot meet the standard requirement in terms of insulation effect, and aims to overcome the defects and meet the use requirement of a 1500-volt direct-current power generation system. The pole connection points are optimally selected in a multi-breakpoint pole connection structure mode, the distance of a conductive loop is shortened, and contact resistance is reduced, so that the power consumption of the circuit breaker is reduced; simultaneously, realize great creepage distance through the circuit breaker size design of an unconventional circuit breaker and the circuit breaker structure of easily making, mainly through increasing the circuit breaker interphase distance, the interelectrode size of conventional circuit breaker generally is 35mm, and the utility model discloses an interelectrode distance is 42mm, and conventional circuit breaker wiring board position size is 24, and the utility model discloses wiring board department size reaches 31mm, reaches 1500V direct current power generation system's insulating requirement, realizes circuit breaker rated operating voltage DC1500V, rated insulation voltage 1600V through a many breakpoints polar connection structure. And can through to many breakpoints utmost point allies oneself with the structural style optimization selection utmost point allies oneself with the point, reduce conductive loop distance, reduce contact resistance to reduce the circuit breaker consumption, simultaneously, realize great creepage distance through the circuit breaker size design of an unconventional circuit breaker and the circuit breaker structure of easily making.

The switch button among the existing circuit breaker is mostly welded on the fixed seat, and when the switch button is damaged, the switch button is not convenient to replace, so that the internal series structure of the high-voltage direct-current molded case circuit breaker is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the inside series structure of a high voltage direct current moulded case circuit breaker who proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an internal series structure of a high-voltage direct-current molded case circuit breaker comprises a circuit breaker body, wherein the circuit breaker body is provided with a static contact, a static contact mounting screw, a moving contact, a rotating shaft, a flexible connection connecting plate, a wiring board, a conductor connecting plate, a switch button, a series conductor, a circuit connecting and breaking circuit which is matched between the static contact and the moving contact, the static contact mounting screw is used for fixing the static contact on a fixed seat, the moving contact is arranged above the static contact, the moving contact is fixed on the rotating shaft and can be used for fixing the moving contact to ensure the synchronism when each moving contact is opened, the flexible connection connecting plate, the conductor connecting plate and the connecting plate are all used for connecting the series conductor and the moving contact, the series conductor is used for the series connection function of a B phase and a C phase, the switch button is provided with a spring, one end of the fixing plate is fixed inside the switch button, the other end of the fixing plate is sleeved on the fixing shaft, and the fixing shaft is arranged at the bottom of the fixing plate

In a further technical scheme, the number of the static contacts is three, the static contacts are arranged on the fixed seat, and the number of the dynamic contacts is three, and the dynamic contacts are arranged on the rotating shaft.

According to the technical scheme, the rotating shaft is provided with three rotating shaft grooves, the rotating shaft grooves are provided with pin shaft holes, the moving contact is arranged in the middle of the rotating shaft grooves and fixed in the rotating shaft grooves through pins, and the moving contact, the pins and the pin shaft holes are in interference fit.

According to the further technical scheme, the number of the wiring boards is two, and the middle of the wiring boards is disconnected.

Compared with the prior art, the beneficial effects of the utility model are that:

the static contact passes through the static contact installation screw fixation on the fixing base, and is more stable when making the moving contact, and the fixing base adopts insulating material, and the pivot groove is equipped with the round pin shaft hole, the moving contact is established in the middle of the pivot groove, and fixes at the pivot inslot through the pin, and moving contact, pin, round pin shaft hole cooperation mode be interference fit, guarantees the synchronism when can making each moving contact open, and the wiring board sets up for two opening a way, avoids appearing the wiring and is close to the emergence short circuit problem, the utility model discloses be convenient for change the button, simple structure, convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of an internal series structure of a high voltage dc molded case circuit breaker according to the present invention;

fig. 2 is a perspective view of an internal series structure of a high voltage dc molded case circuit breaker according to the present invention;

in the figure: 1 static contact, 2 static contact mounting screws, 3 moving contact, 4 rotating shafts, 5 flexible connection connecting plates, 6 wiring boards, 7 conductor connecting wires, 8 connecting plates, 10 switch buttons, 11 series conductors, 20 manual brake buttons, 21 fixing pieces, 22 springs, 23 pins and 24 pin shaft holes

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, an internal series structure of a high voltage dc molded case circuit breaker includes a circuit breaker body, the circuit breaker body is provided with a static contact 1, a static contact mounting screw 2, a moving contact 3, a rotating shaft 4, a flexible connection coupling plate 5, a wiring board 6, a conductor coupling plate 7, a connecting plate 8, a switch button 10, a series conductor 11, the static contact 1 and the moving contact 3 cooperate to connect an electric circuit and a breaking circuit, the static contact mounting screw 2 is used to fix the static contact 1 on a fixed seat, the moving contact 3 is arranged above the static contact 1, the moving contact 3 is fixed on the rotating shaft 4 and can be used to fix the moving contact 3, so that the moving contact 3 can be synchronized when opened, the flexible connection coupling plate 5, the conductor connecting plate 7 and the coupling plate 8 are all used to connect the series conductor and the moving contact 3, the series conductor 11, The C-phase serial connection function is that the switch button 10 is provided with a spring 22, a fixing plate 21 and a manual brake button 20, the spring 22 is arranged inside the fixing plate 21, one end of the spring 22 is fixed inside the switch button 10, the other end of the spring is sleeved on a fixing shaft, and the fixing shaft is arranged at the bottom of the fixing plate 21.

In the utility model, three static contacts 1 are arranged on the fixed seat, three moving contacts 3 are arranged and are corresponding to the static contacts 1 one by one and arranged above the static contacts 1, the rotating shaft 4 is provided with three rotating shaft grooves, the rotating shaft grooves are provided with pin shaft holes 24, the moving contacts 3 are arranged in the middle of the rotating shaft grooves and are fixed in the rotating shaft grooves through pins 23, and the moving contacts 3, the pins 23 and the pin shaft holes 24 are in interference fit, thus the design has the advantages that the synchronism can be ensured when each moving contact 3 is opened, the problem of poor contact can be avoided, the number of the wiring boards 9 is two, the middle is disconnected, the design has the advantages that the external wires can be prevented from being close together, the short circuit is prevented, the spring 22 is arranged in the fixed plate 21, one end is fixed in the switch button 10, the other end sleeve is arranged on the fixed shaft, and the fixed shaft, the advantage of this design is that the movable contact 3 can be synchronously pushed by the elastic deformation of the spring 22 to drive the manual button 20.

The working principle is as follows: the wiring board 9 is connected with an external power supply line, the moving contact 3 is connected through the wiring board 6 and the conductor connecting wire 7, the moving contact 3 is in an open state at the moment, the static contact 1 is connected with the power supply line, the whole circuit is in an open circuit state at the moment, when an electric appliance or an electric equipment needs power, the rotating shaft 4 is provided with three rotating shaft grooves by pushing a manual brake button 20 on a switch button 10, the rotating shaft grooves are provided with pin shaft holes 24, the moving contact 3 is arranged in the middle of the rotating shaft grooves and fixed in the rotating shaft grooves through pins 23, the matching mode of the moving contact 3, the pins 23 and the pin shaft holes 24 is in interference fit, and when the moving contact is pushed to be.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (4)

1. An internal series structure of a high-voltage direct-current molded case circuit breaker comprises a circuit breaker body, wherein the circuit breaker body is provided with a static contact, a static contact mounting screw, a moving contact, a rotating shaft, a flexible connection connecting plate, a wiring board, a conductor connecting plate, a switch button and a series conductor, and is characterized in that the static contact and the moving contact are matched to switch on a circuit and break the circuit, the static contact mounting screw is used for fixing the static contact on a fixed seat, the moving contact is arranged above the static contact, the moving contact is fixed on the rotating shaft and can be used for fixing the moving contact to ensure the synchronism when each moving contact is opened, the flexible connection connecting plate, the conductor connecting plate and the connecting plate are all used for connecting the series conductor and the moving contact, the series conductor is used for the series function of a B phase and a C phase, the spring is arranged in the fixed plate, one end of the spring is fixed in the switch button, the other end of the spring is sleeved on the fixed shaft, and the fixed shaft is arranged at the bottom of the fixed plate.

2. The internal series structure of a high voltage dc molded case circuit breaker according to claim 1, wherein the number of the fixed contacts is three, and the fixed contacts are disposed on the fixed base, and the number of the movable contacts is three, and the movable contacts are disposed on the rotating shaft.

3. The internal series structure of a high voltage dc molded case circuit breaker according to claim 1, wherein the rotating shaft is provided with three rotating shaft slots, the rotating shaft slots are provided with pin holes, the moving contact is disposed in the middle of the rotating shaft slots and fixed in the rotating shaft slots by pins, and the moving contact, the pins and the pin holes are in interference fit.

4. The internal series structure of a high voltage direct current molded case circuit breaker according to claim 1, wherein the number of the terminal blocks is two with a break in between.