Novel molded case circuit breaker

Abstract

The utility model relates to the field of circuit breakers, in particular to a novel molded case circuit breaker. Comprising a circuit breaker shell; the linkage rotating shaft is arranged in the plurality of limiting rings; the energy storage mechanism is arranged on the circuit breaker shell and is linked with the linkage rotating shaft; the contact system is matched with the linkage rotating shaft; the auxiliary switch is arranged on the circuit breaker shell; the motor is installed on the circuit breaker shell and arranged on the side face of the energy storage mechanism, and an output shaft of the motor is connected with a main shaft of the energy storage mechanism in a matched mode; the circuit breaker protection cover is arranged on the circuit breaker shell, and all parts of the circuit breaker are arranged in the circuit breaker protection cover; wherein the limiting ring is of an omega-shaped structure and is fixed on the circuit breaker shell through a fastener; according to the utility model, the linkage rotating shaft is detachably arranged on the circuit breaker shell, so that the replacement cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a novel molded case circuit breaker. Background Art

[0002] A circuit breaker is a mechanical switching device that can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry for a certain time and disconnect current under specified abnormal circuit conditions.

[0003] There is an old type of molded case circuit breaker, which relies on manual or external special motors for opening and closing. The additional motor increases the size of the circuit breaker a lot, resulting in insufficient installation conditions for users, forcing users to give up. Due to the conditions of the circuit breaker itself, users cannot better experience the convenience brought by intelligence, and the selection of accessories is small (after installing one or two, there is no space for other accessories, which cannot meet customer needs, and the reliability of the accessories is not high, which is prone to problems and brings some adverse effects to users). The degree of intelligence is not high and the protection performance is not perfect. It is difficult for old molded case circuit breakers to meet the rapid development of intelligent and networked products.

[0004] Therefore, there is an urgent need to provide an improved technical solution to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a technical effect of facilitating the maintenance and replacement of the linkage rotating shaft in view of the above-mentioned existing technical problems.

[0006] In view of this, the utility model provides a new type of molded case circuit breaker, which is characterized by comprising:

[0007] Circuit breaker housing;

[0008] A linkage rotating shaft, wherein the linkage rotating shaft is arranged in a plurality of limit rings;

[0009] An energy storage mechanism, which is mounted on the circuit breaker housing and is linked to the linkage shaft;

[0010] A contact system, the contact system cooperates with a linkage shaft;

[0011] Auxiliary switch, the auxiliary switch is arranged on the circuit breaker housing;

[0012] The motor is mounted on the circuit breaker housing and arranged on the side of the energy storage mechanism, and the output shaft of the motor is cooperatively connected with the main shaft of the energy storage mechanism;

[0013] A circuit breaker protection cover, wherein the circuit breaker protection cover is arranged on the circuit breaker housing, and all parts of the circuit breaker are arranged in the circuit breaker protection cover;

[0014] The limiting ring is an Ω-shaped structure and is fixed to the circuit breaker housing by fasteners.

[0015] Furthermore, it also includes:

[0016] Intelligent controller,Intelligent controller is used to control and protect the power distribution network.

[0017] Furthermore, the intelligent controller includes a display screen.

[0018] Furthermore, it also includes:

[0019] A manual energy storage handle is provided on the energy storage mechanism and is used to adjust the energy storage mechanism to an energy storage state.

[0020] Furthermore, it also includes: a plurality of positioning blocks, which are evenly distributed at the edge of the circuit breaker housing and are wedged with the inner wall of the circuit breaker protection cover.

[0021] Furthermore, the linkage shaft is installed on the energy storage mechanism.

[0022] Furthermore, the energy storage mechanism adopts a five-link structure.

[0023] Furthermore, a reserved space is provided above the energy storage mechanism, and a plurality of reserved mounting holes for mounting shunt releasers are provided on the upper end surface of the energy storage mechanism.

[0024] Furthermore, it also includes: a closing electromagnet, which is arranged in a reserved space above the energy storage mechanism and is arranged in coordination with the energy storage mechanism.

[0025] Furthermore, it also includes: an arc extinguishing chamber, which is arranged on the upper end surface of the circuit breaker housing.

[0026] The beneficial effects of the utility model are:

[0027] 1. The utility model detachably mounts the linkage shaft on the circuit breaker housing. When the linkage shaft loses its working ability due to damage and needs to be replaced, the limit ring is removed and the linkage shaft is replaced, thereby reducing the replacement cost.

[0028] 2. The utility model provides a plurality of positioning blocks, which can enable the circuit breaker protection cover to be positioned and installed more quickly during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0030] Figure 2 It is a three-dimensional structural schematic diagram of another direction of the utility model;

[0031] Figure 3A schematic diagram of the three-dimensional structure of the circuit breaker protection cover of the utility model

[0032] Figure 4 for Figure 2 Schematic diagram of the structure of the middle A area;

[0033] Figure 5 for Figure 1 Schematic diagram of the structure of area B.

[0034] The symbols in the figure are:

[0035] 1. Circuit breaker housing; 2. Limiting ring; 3. Linkage shaft; 4. Energy storage mechanism; 5. Contact system; 6. Circuit breaker protection cover; 7. Intelligent controller; 8. Motor; 9. Manual energy storage handle; 10. Arc extinguishing chamber; 11. Reserved space; 12. Reserved installation hole; 13. Base; 14. Display screen; 15. Positioning block. Specific embodiments

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0037] Embodiment 1:

[0038] This embodiment provides a new type of molded case circuit breaker, which is characterized by comprising:

[0039] Circuit breaker housing 1;

[0040] A linkage shaft 3, wherein the linkage shaft 3 is arranged in a plurality of limit rings 2;

[0041] An energy storage mechanism 4, which is mounted on the circuit breaker housing 1 and is linked to the linkage shaft 3;

[0042] The contact system 5 cooperates with the linkage shaft 3;

[0043] Auxiliary switch, the auxiliary switch is arranged on the circuit breaker housing 1;

[0044] The motor 8 is mounted on the circuit breaker housing 1 and arranged on the side of the energy storage mechanism 4, and the output shaft of the motor 8 is cooperatively connected with the main shaft of the energy storage mechanism 4;

[0045] A circuit breaker protection cover 6, wherein the circuit breaker protection cover 6 is arranged on the circuit breaker housing 1, and all parts of the circuit breaker are arranged in the circuit breaker protection cover 6;

[0046] The limiting ring (2) is an Ω-shaped structure and is fixed to the circuit breaker housing (1) by means of fasteners.

[0047] The circuit breaker housing 1 is a square structure, and the front end surface of the circuit breaker housing 1 is the mounting surface. The energy storage mechanism 4 is a prior art. The energy storage mechanism 4 can compress the energy storage spring to make it have corresponding potential energy. The energy storage spring is inside the energy storage mechanism. When closing or opening the circuit breaker, after the switch is pulled (pressing the corresponding button), the energy storage spring quickly closes or separates the moving contact of the circuit breaker. Its main purpose is to reduce the arc existence time of closing or opening the circuit breaker, so as to achieve the purpose of rapid arc extinguishing (fast closing), and the energy storage mechanism can pre-store energy. When opening or closing the circuit breaker is required, the energy storage mechanism releases energy. After releasing energy, pre-storage can be performed manually or electrically.

[0048] The linkage shaft 3 is an intermediate linkage mechanism used to make the contact system 5 and the energy storage mechanism cooperate with each other.

[0049] The linkage rotating shaft 3 is installed on the circuit breaker housing 1 through the limiting ring 2.

[0050] The auxiliary switch is a part of the main switch. The specific structure of the auxiliary switch is not shown in the figure. The figure provides a base 13 for mounting the auxiliary switch. It is usually composed of a control circuit, a contact system and an operating mechanism. When the circuit breaker is in normal working state, the auxiliary switch transmits corresponding signals through the closing or opening of the contacts to realize the control and monitoring of the circuit breaker.

[0051] The contact system of the auxiliary switch is usually composed of normally closed contacts and normally open contacts. When the circuit breaker is in the closed state, the normally closed contacts are closed and the normally open contacts are open; when the circuit breaker is in the open state, the normally open contacts are closed and the normally closed contacts are open. By monitoring the status of these two sets of contacts, the opening and closing status of the circuit breaker can be obtained.

[0052] The control circuit of the auxiliary switch is responsible for receiving the status signal of the contact and then transmitting the signal to the control system to realize the control and monitoring of the circuit breaker.

[0053] A motor 8 is provided on the right side of the energy storage mechanism 4. The rotating output shaft of the motor 8 is connected to the main shaft of the energy storage mechanism 4. The connection can be through a coupling, or through a wedge-shaped structure and then fixedly connected through a fastener. The motor 8 can be externally connected to a power supply or internally connected to a circuit for power supply. The motor 8 rotates to rotate the main shaft of the energy storage mechanism 4, so that the energy storage spring in the energy storage mechanism 4 is adjusted to the energy storage state. The circuit breaker protection cover 6 is installed on the circuit breaker housing 1 through fasteners, and all parts of the circuit breaker are arranged in the circuit breaker protection cover 6. The motor 8 is arranged in the circuit breaker housing 1. The circuit breaker protective cover 6 is used to prevent the motor 8 from being accidentally touched by external force, causing the motor 8 to move, resulting in the output shaft of the motor 8 and the main shaft of the energy storage mechanism 4 rotating out of axial rotation, which will cause vibration and reduce the possibility of fracture of the interface between the output shaft of the motor 8 and the main shaft of the energy storage mechanism 4. By arranging the motor 8 in the circuit breaker protective cover 6, the motor 8 and the circuit breaker are integrated as a whole, and the circuit breaker protective cover 6 can protect all devices in the circuit breaker protective cover 6. When the motor and the electric opening and closing device are added, electrical linkage and remote override can be easily realized, and the overall volume is smaller.

[0054] The limiting ring 2 is an Ω-shaped structure, and the two ends of the limiting ring 2 are plate-shaped. Bolts penetrate the plate-shaped structure, and the linkage shaft 3 is first installed in all the limiting rings 2 and then fixed on the circuit breaker housing 1.

[0055] By detachably mounting the linkage shaft 3 on the circuit breaker housing 1 , when the linkage shaft 3 loses its working ability due to damage and needs to be replaced, the limit ring 2 is removed and then the linkage shaft 3 is replaced, thereby reducing replacement costs.

[0056] Embodiment 2:

[0057] This embodiment provides a new type of molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0058] Also includes:

[0059] The intelligent controller 7 is used to control and protect the power distribution network.

[0060] The intelligent controller 7 is composed of three basic modules: data acquisition, intelligent identification and adjustment device. The intelligent identification module is the core of the intelligent control unit. The microcomputer control system composed of a microprocessor can automatically identify the state of the electrical equipment under the control of the circuit breaker according to the grid information collected before the operation and the operation signal sent by the main control room, protect the normal operation of the electrical equipment, determine the appropriate opening and closing movement characteristics according to the results of the circuit breaker simulation analysis, and send adjustment information to the actuator, and send the opening and closing signal after the adjustment is completed; the data acquisition module is mainly composed of new sensors, which provide the data of the power consumption of the electrical equipment in the form of digital signals to the intelligent identification module at any time for processing and analysis; the actuator is composed of components that can receive quantitative control information and drive actuators, which are used to adjust the parameters of the operating mechanism so as to change the movement characteristics during each operation. In addition, display modules, communication modules and various detection modules can be installed as needed to expand the intelligent functions of the intelligent operation circuit breaker; the circuit breaker status diagnosis and maintenance can be performed, such as detecting contact wear, measuring current size, etc.; the intelligent controller can read the operating parameters of the power grid in time through a visual window, and users can allocate electricity according to their needs to achieve energy saving and emission reduction.

[0061] Embodiment 3:

[0062] This embodiment provides a new type of molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] The intelligent controller 7 includes a display screen 14 .

[0064] The intelligent controller 7 is provided with a display screen 14 , through which the current state of the circuit breaker can be intuitively reflected.

[0065] Also includes:

[0066] The manual energy storage handle 9 is arranged on the energy storage mechanism 4 and is used to adjust the energy storage mechanism 4 to the energy storage state.

[0067] By providing a manual energy storage handle 9 connected to the energy storage shaft of the energy storage mechanism 4, the shaft can be rotated manually to store energy, and when the motor 8 is damaged, the manual energy storage handle 9 can be used as an emergency measure.

[0068] The contact system 5 is arranged in the circuit breaker housing.

[0069] It also includes an arc extinguishing chamber 10, which is arranged on the upper end surface of the circuit breaker housing 1. The arc extinguishing chamber 10 includes a housing, grids and an arc extinguishing cover 11. A plurality of grids are arrayed inside a housing, and the arc extinguishing cover 11 is arranged on the top of the arc extinguishing chamber 10. When a strong current is interrupted, a large amount of high-temperature and high-pressure ionized gas will be generated along with the arc burning. These gases are quickly cooled, compounded, and deionized inside the arc extinguishing chamber 10 of the phase and are discharged from the arc extinguishing chamber 10 in time to prevent leakage through the surrounding gaps to the adjacent phase or contact with the grounded metal outside the circuit breaker. Otherwise, it will cause phase-to-phase and ground short-circuit faults, the arc cannot be extinguished, and the breaking failure (damage to the circuit breaker, electrical equipment and lines) will occur.

[0070] The circuit breaker housing 1 further comprises: a plurality of positioning blocks 15 , which are evenly arranged at the edge of the circuit breaker housing 1 and abut against the inner wall of the circuit breaker protection cover 6 .

[0071] By providing a plurality of positioning blocks 15 , the circuit breaker protection cover 6 can be positioned and installed more quickly during installation.

[0072] The linkage rotating shaft 3 is installed on the energy storage mechanism 4 .

[0073] The linkage shaft 3 is installed on the energy storage mechanism 4. The linkage shaft 3 is directly installed on the energy storage mechanism 4. When installing, the linkage shaft 3 can be installed on the energy storage mechanism 4 first and then installed. The energy storage mechanism 4 is first fixed on the circuit breaker housing 1 to achieve fixation, and then the linkage shaft 3 is fixed and limited by the limit ring 2. Through the technology of preferentially installing the linkage shaft 3, the installation of the linkage shaft 3 can be more convenient.

[0074] The energy storage mechanism adopts a five-link structure.

[0075] The energy storage mechanism adopts a five-link structure in the energy storage structure of the frame circuit breaker.

[0076] A reserved space 11 is provided above the energy storage mechanism 4 , and a plurality of reserved mounting holes 12 for mounting shunt releasers are provided on the upper end surface of the energy storage mechanism 4 .

[0077] Two reserved mounting holes 12 for mounting shunt releases are provided at the rear side of the upper surface of the energy storage mechanism 4. Installing a shunt release can improve the safety of the equipment. By setting a shunt release, it is actually a tripping coil. Applying a specified voltage or current to the shunt release can trip the circuit breaker. With the shunt release, remote tripping control can be achieved through a certain control loop. By setting the reserved mounting holes 12 and the reserved space 11, a shunt release can be added to the reserved mounting hole 12, and two can be installed. When one of the shunt releases fails, a shunt release can be used as an emergency measure.

[0078] It also includes a closing electromagnet, which is arranged in a reserved space (15) above the energy storage mechanism (4) and is arranged in coordination with the energy storage mechanism (4).

[0079] The closing electromagnet cooperates with the external circuit to prevent the circuit breaker from being connected by mistake. The closed normally open auxiliary point is connected in series to the circuit of the circuit breaker, and the circuit is not turned on before the closure becomes electrical. The piston rod of the circuit breaker lock electromagnet is installed next to the connection shaft. When it is not started, the piston rod will lock the connection mechanism to prevent the circuit breaker from being manually connected.

[0080] The circuit breaker further comprises an arc extinguishing chamber 10 , which is arranged on the upper end surface of the circuit breaker housing 1 .

[0081] The arc extinguishing chamber 10 includes a shell, grids and an arc extinguishing cover. Multiple grid arrays are inside a shell, and the arc extinguishing cover is arranged on the top of the arc extinguishing chamber 10. When a strong current is interrupted, a large amount of high-temperature and high-pressure ionized gas will be generated along with the arc burning. These gases are quickly cooled, recombined, and deionized inside the arc extinguishing chamber 10 of the phase and are discharged from the arc extinguishing chamber 10 in time to prevent leakage through the surrounding gaps to the adjacent phase or contact with the grounded metal outside the circuit breaker. Otherwise, it will cause phase-to-phase and ground short-circuit faults, the arc cannot be extinguished, and the interruption failure occurs.

[0082] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which belong to the protection scope of the present application.

Claims

1. A new type of molded case circuit breaker, characterized in that: include: Circuit breaker housing (1); A linkage rotating shaft (3), wherein the linkage rotating shaft (3) is arranged in a plurality of limiting rings (2); An energy storage mechanism (4), the energy storage mechanism (4) is mounted on the circuit breaker housing (1) and is linked to the linkage shaft (3); A contact system (5), the contact system (5) cooperates with the linkage shaft (3); An auxiliary switch, the auxiliary switch being arranged on the circuit breaker housing (1); An electric motor (8), the electric motor (8) being mounted on the circuit breaker housing (1) and arranged on the side of the energy storage mechanism (4), the output shaft of the electric motor (8) being cooperatively connected with the main shaft of the energy storage mechanism (4); A circuit breaker protection cover (6), wherein the circuit breaker protection cover (6) is arranged on the circuit breaker housing (1), and all parts of the circuit breaker are arranged in the circuit breaker protection cover (6); The limiting ring (2) is an Ω-shaped structure and is fixed to the circuit breaker housing (1) by means of fasteners.

2. A new type of molded case circuit breaker according to claim 1, characterized in that: Also includes: An intelligent controller (7) is used to control and protect a power distribution network.

3. A new type of molded case circuit breaker according to claim 1, characterized in that: The intelligent controller (7) comprises a display screen (14).

4. A new type of molded case circuit breaker according to claim 1, characterized in that: Also includes: A manual energy storage handle (9) is arranged on the energy storage mechanism (4) and is used to adjust the energy storage mechanism (4) to an energy storage state.

5. A new type of molded case circuit breaker according to claim 1, characterized in that: Also includes: A plurality of positioning blocks (15) are evenly distributed on the edge of the circuit breaker housing (1) and are wedged with the inner wall of the circuit breaker protection cover (6).

6. A new type of molded case circuit breaker according to claim 1, characterized in that: The linkage rotating shaft (3) is mounted on the energy storage mechanism (4).

7. A new type of molded case circuit breaker according to claim 1, characterized in that: The energy storage mechanism adopts a five-link structure.

8. A new type of molded case circuit breaker according to claim 1, characterized in that: A reserved space (11) is provided above the energy storage mechanism (4), and a plurality of reserved mounting holes (12) for mounting shunt releasers are provided on the upper end surface of the energy storage mechanism (4).

9. A new type of molded case circuit breaker according to claim 8, characterized in that: Also includes: A closing electromagnet is arranged in a reserved space (11) above the energy storage mechanism (4) and is arranged in coordination with the energy storage mechanism (4).

10. A new type of molded case circuit breaker according to claim 1, characterized in that: Also includes: The arc extinguishing chamber (10) is arranged on the upper end surface of the circuit breaker housing (1).

Images