A circuit breaker with an opening and closing drive mechanism

Abstract

The application discloses an opening and closing driving mechanism circuit breaker and relates to the technical field of circuit breakers. The circuit breaker comprises a box body, an insulating cylinder, a vacuum arc-extinguishing chamber and a contact assembly, and further comprises a driving assembly, a buffer assembly and a compensation assembly. The driving assembly comprises a driving rod which is in sliding connection with the box body and is used for driving the contact assembly to separate or contact. The buffer assembly comprises a supporting block which is located in the box body and is in sliding connection with the driving rod. The driving rod is in sliding connection with the supporting block through a push plate. The supporting block is fixedly provided with an air cylinder. The air cylinder is used for buffering the rapid sliding of the driving rod. The compensation assembly comprises an adjusting cylinder which is fixedly connected with the air cylinder. The adjusting cylinder is connected with a compensation cylinder through an air pipe. The adjusting cylinder is provided with an air guide hole. When the driving rod slides, the gas in the air cylinder is extruded into the compensation cylinder through the air guide hole. The sliding of the driving rod is dynamically compensated and buffered. The application can dynamically buffer and compensate the contact of the contact.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and in particular to a circuit breaker with a switching drive mechanism. Background Technology

[0002] A circuit breaker is a mechanical switching device capable of connecting and disconnecting the normal current carrying a circuit, as well as connecting and disconnecting the current carrying the circuit under specified abnormal circuit conditions and within a certain time. It can automatically disconnect the circuit in the event of severe overload, short circuit, or undervoltage faults. Its function is equivalent to a combination of a fuse switch and an over / under-temperature relay, and it generally does not require replacement of components after disconnecting the fault current, thus gaining widespread application.

[0003] Outdoor vacuum circuit breakers generally consist of a housing and an insulating cylinder at the top of the housing. Inside the insulating cylinder is a vacuum interrupter, containing fixed and moving contacts. These contacts connect to the power supply line and load line, respectively. The housing also houses a transmission mechanism and an operating mechanism, which extend into the insulating cylinder via an insulating rod to drive the moving contact in closing and opening motions. During this process, a spring energy storage mechanism stores energy to drive the transmission mechanism, thus completing the closing action. However, if the spring energy storage mechanism does not provide adequate cushioning after releasing its force, the transmission mechanism can easily cause the moving contact to impact the fixed contact, leading to contact wear and poor contact between the contacts. Furthermore, prolonged use of the spring energy storage mechanism can result in elastic fatigue, causing the transmission mechanism to fail to operate properly, also resulting in poor contact and potentially causing safety issues.

[0004] Therefore, a circuit breaker with a switching drive mechanism is invented to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a circuit breaker with a switching drive mechanism that can effectively solve the technical problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a circuit breaker with a switching drive mechanism, comprising a housing, an insulating cylinder, a vacuum interrupter chamber and a contact assembly, and further comprising: a drive assembly, which includes a drive rod slidably connected to the housing, for driving the contact assembly to open or close the circuit.

[0007] A buffer assembly includes a support block located inside the housing and slidably connected to the drive rod. The drive rod is slidably connected to the support block via a push plate. An air cylinder is fixed inside the support block to buffer the rapid sliding of the drive rod.

[0008] The compensation component includes an adjusting cylinder fixedly connected to the air cylinder. The adjusting cylinder is connected to the compensation cylinder via an air pipe. The adjusting cylinder has multiple sets of circumferentially distributed air guide holes. When the drive rod slides, the gas in the air cylinder is forced into the compensation cylinder through the air guide holes to dynamically compensate for and buffer the sliding of the drive rod.

[0009] Preferably, the push plate is located between the adjusting cylinder and the compensating cylinder, and a push rod that contacts the push plate is slidably connected inside the air cylinder, with a pressure plate that is slidably connected to the air cylinder fixed on the push rod.

[0010] Preferably, the compensation component includes an adjusting block that is slidably connected to the adjusting cylinder, the adjusting block being fixedly connected to the push plate via an auxiliary rod, and the adjusting block having a plurality of air guide grooves communicating with the air guide holes.

[0011] Preferably, the compensation cylinder is slidably connected to two piston plates, and an adjusting rod is fixedly connected to the piston plate. The two adjusting rods are slidably connected, and an elastic element is provided between the compensation cylinder and the piston plate.

[0012] Preferably, the diameter of the air guide groove is larger than the diameter of the air guide hole, and the diameter of the multiple sets of air guide holes increases sequentially towards the air cylinder.

[0013] Preferably, the air cylinder is filled with inert gas, and the connection port between the air pipe and the compensation cylinder is located between the two piston plates.

[0014] Preferably, the drive assembly includes a plurality of swing arms corresponding to the insulating cylinder and hinged to the drive rod. An insulating rod that is slidably connected to the insulating cylinder is hinged to the swing arm. A spring energy storage assembly located inside the housing is provided on the drive rod for storing energy for the rapid sliding of the drive rod.

[0015] Preferably, the contact assembly includes a stationary contact located within the vacuum interrupter chamber, an insulating rod extending into the vacuum interrupter chamber and having a moving contact fixed thereon, and a corrugated tube fitted onto the insulating rod.

[0016] Preferably, an upper terminal is fixed at the end of the insulating cylinder away from the housing, and a lower terminal is fixed at the middle of the insulating cylinder.

[0017] Preferably, a control component that is slidably connected to the drive rod is fixed inside the housing for controlling the release and energy storage of the spring energy storage component.

[0018] The technical effects and advantages of this invention are as follows:

[0019] This invention utilizes the coordinated arrangement of an air cylinder, push plate, adjusting block, compensating cylinder, and piston plate. When the drive rod slides rapidly, the inert gas inside the air cylinder is compressed. This compression, along with the connection between the air guide holes and guide grooves of different diameters, not only buffers the sliding of the drive rod but also, when the drive rod does not reach its designated position, the inert gas compresses the piston plate, thus compensating for the sliding of the drive rod. This ensures the drive rod slides to its designated position while providing some buffering. The dynamic buffering and compensation of the drive rod's sliding results in more stable contact between the stationary and moving contacts, guaranteeing normal operation and further improving the equipment's service life and safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 This is a cross-sectional view of the overall structure of the present invention from another perspective;

[0023] Figure 4 This is a schematic diagram of the buffer component in this invention;

[0024] Figure 5 This is a cross-sectional view of the buffer component in this invention;

[0025] Figure 6 This is a schematic diagram showing the structure of the buffer component and the compensation component in this invention.

[0026] Figure 7 This is a schematic diagram showing the structure of the compensation component of the present invention.

[0027] In the diagram: 1. Box housing; 2. Insulating cylinder; 3. Vacuum interrupter chamber;

[0028] 4. Contact assembly; 401. Stationary contact; 402. Moving contact; 403. Bellows;

[0029] 5. Drive assembly; 501. Drive rod; 502. Swing rod; 503. Insulating rod;

[0030] 6. Buffer assembly; 601. Support block; 602. Push plate; 603. Air cylinder; 604. Push rod; 605. Pressure plate;

[0031] 7. Compensation assembly; 701. Adjusting cylinder; 702. Air pipe; 703. Compensation cylinder; 704. Air guide hole; 705. Adjusting block; 706. Auxiliary rod; 707. Air guide groove; 708. Piston plate; 709. Adjusting rod; 710. Elastic element; 711. Inert gas;

[0032] 8. Spring energy storage component; 9. Upper terminal; 10. Lower terminal; 11. Control component. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figures 1 to 3 As shown, this embodiment provides a circuit breaker with an opening and closing drive mechanism, including a housing 1, an insulating cylinder 2, a vacuum interrupter 3, and a contact assembly 4. It also includes a drive assembly 5, which includes a drive rod 501 slidably connected to the housing 1 for driving the contact assembly 4 to open or close the circuit. The drive assembly 5 includes multiple swing rods 502 corresponding to the insulating cylinder 2 and hinged to the drive rods 501. An insulating rod 503 slidably connected to the insulating cylinder 2 is hinged to the swing rods 502. A spring energy storage assembly 8 located inside the housing 1 is provided on the drive rod 501 for storing energy during the rapid sliding of the drive rod 501.

[0036] The contact assembly 4 includes a stationary contact 401 located inside the vacuum interrupter 3, an insulating rod 503 extending into the vacuum interrupter 3 and a moving contact 402 fixed thereon, a bellows 403 fitted onto the insulating rod 503, an upper terminal 9 fixed at the end of the insulating cylinder 2 away from the housing 1, a lower terminal 10 fixed in the middle of the insulating cylinder 2, and a control assembly 11 fixed inside the housing 1 and slidably connected to the drive rod 501 for controlling the release and energy storage of the spring energy storage assembly 8.

[0037] In actual use, the upper terminal 9 and the lower terminal 10 are first connected. When closing the circuit is required, the spring energy storage component 8 is controlled by the control component 11 to release its elastic energy. Both the control component 11 and the spring energy storage component 8 are existing technologies, and their specific structures and connections will not be described in detail. At this time, the spring energy storage component 8 drives the drive rod 501 to slide along the housing 1 under the action of elastic force. This causes the drive rod 501 to drive the insulating rod 503 to slide upward along the insulating cylinder 2 through the swing rod 502. This causes the insulating rod 503 to drive the moving contact 402 to slide upward along the insulating cylinder 2. The vacuum interrupter 3 slides towards the stationary contact 401, and the bellows 403 inside the vacuum interrupter 3 extends and retracts, which can ensure the vacuum level inside the vacuum interrupter 3 and achieve a better arc extinguishing effect. When the spring energy storage component 8 has released its elasticity, the moving contact 402 contacts the stationary contact 401 to complete the closing action. When opening, the control component 11 only needs to drive the drive rod 501 to slide in the opposite direction to complete the opening action. At this time, the drive rod 501 can drive the spring energy storage component 8 to store energy again, which facilitates the rapid completion of the closing action.

[0038] Example 2

[0039] During use, it was found that during the release of the spring force, due to excessive impact force and lack of buffering, the moving contact 402 can easily impact the stationary contact 401 rapidly, leading to increased wear between the stationary contact 401 and the moving contact 402, which can easily cause poor contact. At the same time, the spring will experience elastic fatigue after long-term operation, and without proper compensation, the stationary contact 401 and the moving contact 402 may not make proper contact. Therefore, further improvements were made based on the above embodiments.

[0040] like Figures 2 to 7 As shown, the buffer assembly 6 includes a support block 601 located inside the housing 1 and slidably connected to the drive rod 501. The drive rod 501 is slidably connected to the support block 601 via a push plate 602. An air cylinder 603 is fixed inside the support block 601 to buffer the rapid sliding of the drive rod 501.

[0041] The compensation component 7 includes an adjusting cylinder 701 fixedly connected to the air cylinder 603. The adjusting cylinder 701 is connected to the compensation cylinder 703 through an air pipe 702. The adjusting cylinder 701 has multiple sets of circumferentially distributed air guide holes 704. When the drive rod 501 slides, the gas in the air cylinder 603 is squeezed into the compensation cylinder 703 through the air guide holes 704 to dynamically compensate for and buffer the sliding of the drive rod 501.

[0042] The push plate 602 is located between the adjusting cylinder 701 and the compensating cylinder 703. The push rod 604, which is in contact with the push plate 602, is slidably connected inside the air cylinder 603. The pressure plate 605, which is slidably connected to the air cylinder 603, is fixed on the push rod 604.

[0043] The compensation component 7 includes an adjustment block 705 that is slidably connected to the adjustment cylinder 701. The adjustment block 705 is fixedly connected to the pressure plate 605 via an auxiliary rod 706. The adjustment block 705 has multiple air guide grooves 707 that communicate with the air guide holes 704.

[0044] The compensating cylinder 703 is slidably connected to two piston plates 708. An adjusting rod 709 is fixedly connected to the piston plate 708. The two adjusting rods 709 are slidably connected. An elastic element 710 is provided between the compensating cylinder 703 and the piston plate 708.

[0045] The diameter of the air guide groove 707 is larger than the diameter of the air guide hole 704, and the diameter of the multiple sets of air guide holes 704 increases sequentially towards the air cylinder 603.

[0046] The air cylinder 603 is filled with inert gas 711, and the connection port between the air pipe 702 and the compensating cylinder 703 is located between the two piston plates 708.

[0047] In actual use, when the spring energy storage component 8 drives the drive rod 501 to slide rapidly, and the spring is in a normal state, the drive rod 501 drives the push plate 602 to slide along the support block 601, so that the push plate 602 gradually contacts the push rod 604. At the same time, under the action of the elastic element 710, the elastic element 710 drives the two adjusting rods 709 to slide along the compensation cylinder 703 through the piston plate 708, so that one of the adjusting rods 709 is always in contact with the push plate 602. When the push plate 602 contacts the push rod 604, the push plate 602 pushes the push rod 604 to drive the pressure plate 605 to slide rapidly along the air cylinder 603. The pressure plate 605 drives the adjusting block 705 to slide rapidly along the adjusting cylinder 701 through the auxiliary rod 706. The diameter of the adjusting cylinder 701 is much smaller than the diameter of the air cylinder 603. The compensation cylinder 703 is also filled with inert gas located between the two piston plates 708. Inert gas 711 is introduced. At this time, the air guide groove 707 on the adjusting block 705 is connected to the air guide hole 704 in sequence, and a portion of the inert gas 711 is squeezed into the compensation cylinder 703 through the air pipe 702 via the air guide groove 707 and the air guide hole 704. Since the spring energy storage component 8 is in normal condition, the air guide groove 707 on the adjusting block 705 is quickly connected to the air guide hole 704 with the smallest diameter. The diameter of the air guide hole 704 increases sequentially towards the air cylinder 603, so that the amount of inert gas 711 squeezed into the compensation cylinder 703 through the air pipe 702 is small. At this time, the air cylinder 603 provides a large buffering resistance to the sliding of the drive rod 501. Thus, after the spring energy storage component 8 has released its elastic force, it can play a certain buffering effect on the sliding of the drive rod 501, avoiding collision and accelerated wear of the stationary contact 401 and the moving contact 402, and avoiding the problem of poor contact.

[0048] When the spring energy storage component 8 experiences certain elastic fatigue, causing the stationary contact 401 and the moving contact 402 to fail to make proper contact, the drive rod 501 slides, causing the push plate 602 to slide along the support block 601, so that the push plate 602 gradually contacts the push rod 604. At the same time, under the action of the elastic element 710, the elastic element 710 drives the two adjusting rods 709 to slide along the compensation cylinder 703 through the piston plate 708, so that one of the adjusting rods 709 is always in contact with the push plate 602. When the push plate 602 contacts the push rod 604, the push plate 602 pushes the push rod 604 to drive the pressure plate 605 to slide along the air cylinder 603. The pressure plate 605 drives the adjusting block 705 to slide along the adjusting cylinder 701 through the auxiliary rod 706. At this time, the air guide groove 707 on the adjusting block 705 is connected to the air guide hole 704 in sequence.

[0049] At this time, because the air guide groove 707 on the adjusting block 705 cannot quickly contact the smallest diameter air guide hole 704, the air guide groove 707 first contacts the largest diameter air guide hole 704, causing a large amount of inert gas 711 in the air cylinder 603 to be forced into the compensating cylinder 703 through the air pipe 702. Since the connection between the air pipe 702 and the compensating cylinder 703 is located between the two piston plates 708, inert gas 711 is filled between the two piston plates 708. Because the two adjusting rods 709 are slidably connected, the inert gas 711 pushes one of the piston plates 708, causing one adjusting rod 709 to move along the other... One adjusting rod 709 slides, causing one of the adjusting rods 709 to apply pressure to the push plate 602 under the action of inert gas 711. This can compensate for the sliding of the drive rod 501 when the spring energy storage component 8 experiences elastic fatigue, allowing the drive rod 501 to slide stably to the preset position, so that the stationary contact 401 and the moving contact 402 can make contact and ensure a good closing environment. During the sliding process of the drive rod 501, dynamic buffering and pressure compensation can be performed to ensure that the stationary contact 401 and the moving contact 402 make contact and avoid impact wear.

[0050] In summary, through the coordinated arrangement of the air cylinder 603, push plate 602, adjusting block 705, compensating cylinder 703, and piston plate 708, when the drive rod 501 slides rapidly, the inert gas 711 inside the air cylinder 603 is compressed. This allows the air guide holes 704 and air guide grooves of different diameters to communicate, which not only provides a certain buffering effect on the sliding of the drive rod 501, but also compresses the piston plate 708 when the drive rod 501 does not slide to its intended position. This allows the adjusting rod 709 to compensate for the sliding of the drive rod 501, ensuring that the drive rod 501 slides to its intended position while also providing some buffering. The dynamic buffering and compensation of the sliding of the drive rod 501 makes the contact between the stationary contact 401 and the moving contact 402 more stable, ensuring normal operation and further improving the service life and safety of the equipment.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An open-close drive mechanism breaker comprising a tank (1), an insulating cylinder (2), a vacuum arc-extinguishing chamber (3) and a contact assembly (4), characterized in that, Also include: The driving assembly (5) includes the driving rod (501) which is slidably connected with the box (1), and is used for driving the contact assembly (4) to open or close; The buffer assembly (6) includes the support block (601) which is slidably connected with the driving rod (501), the driving rod (501) is slidably connected with the support block (601) through the push plate (602), the support block (601) is fixedly connected with the air cylinder (603) inside, and the rapid sliding of the driving rod (501) is buffered; The compensation assembly (7) includes the adjusting cylinder (701) which is fixedly connected with the air cylinder (603), the adjusting cylinder (701) is connected with the compensation cylinder (703) through the air pipe (702), a plurality of circumferentially distributed air guide holes (704) are formed in the adjusting cylinder (701), when the driving rod (501) slides, the gas in the air cylinder (603) is extruded into the compensation cylinder (703) through the air guide hole (704), and the dynamic compensation and buffering of the driving rod (501) sliding are realized; The compensation assembly (7) includes the adjusting block (705) which is slidably connected with the adjusting cylinder (701), the adjusting block (705) is fixedly connected with the push plate (602) through the auxiliary rod (706), and a plurality of air guide grooves (707) which are in communication with the air guide holes (704) are formed in the adjusting block (705); The compensation cylinder (703) is slidably connected with two piston plates (708), the adjusting rod (709) is fixedly connected with the piston plate (708), the two adjusting rods (709) are slidably connected, and the elastic member (710) is arranged between the compensation cylinder (703) and the piston plate (708); The diameter of the air guide groove (707) is greater than that of the air guide hole (704), and the diameters of the plurality of air guide holes (704) gradually increase in the direction close to the air cylinder (603); The air cylinder (603) is filled with inert gas (711), and the connecting port of the air pipe (702) and the compensation cylinder (703) is located between the two piston plates (708).

2. A drive mechanism circuit breaker according to claim 1, wherein: The push plate (602) is located between the adjusting cylinder (701) and the compensation cylinder (703), the push rod (604) which is in contact with the push plate (602) is slidably connected in the air cylinder (603), and the pressing plate (605) which is slidably connected with the air cylinder (603) is fixedly connected with the push rod (604).

3. A drive mechanism for an open-close circuit breaker according to claim 1, characterized in that: The driving assembly (5) includes a plurality of swing rods (502) which are correspondingly arranged in the insulating cylinder (2) and are hingedly connected with the driving rod (501), the insulating rod (503) which is slidably connected with the insulating cylinder (2) is hingedly connected with the swing rod (502), and the spring energy storage assembly (8) which is located in the box (1) is arranged on the driving rod (501), and the rapid sliding of the driving rod (501) is stored.

4. The opening and closing drive mechanism circuit breaker of claim 1, wherein: The contact assembly (4) comprises a static contact (401) located in the vacuum arc-extinguishing chamber (3), the insulating rod (503) extends into the vacuum arc-extinguishing chamber (3) and is fixed with a moving contact (402), and a bellows (403) is sleeved on the insulating rod (503).

5. An opening and closing drive mechanism circuit breaker according to claim 1, characterized in that: An upper wiring terminal (9) is fixed to one end of the insulating cylinder (2) away from the box (1), and a lower wiring terminal (10) is fixed to the middle of the insulating cylinder (2).

6. An opening and closing drive mechanism circuit breaker according to claim 3, characterized in that: A control assembly (11) is fixed in the box (1) and is in sliding connection with the driving rod (501), so as to control the release and energy storage of the spring energy storage assembly (8).

Images