Circuit breaker for ring main unit

Abstract

The utility model provides a circuit breaker for a ring main unit, which relates to the technical field of circuit breakers and comprises a bottom plate, a buffer mechanism is arranged at the top end of the bottom plate, a mounting plate is mounted at the top end of the buffer mechanism, a mounting cavity is mounted at the top end of the mounting plate, and a connecting mechanism is arranged in the mounting cavity. A circuit breaker main body is mounted at the top end of the connecting mechanism; according to the circuit breaker, the connecting mechanism is arranged in the mounting cavity, and the circuit breaker main body can be conveniently dismounted and mounted through the mutual cooperation of the mounting seat, the connecting block, the positioning hole, the cavity, the fixing pin and the telescopic spring of the connecting mechanism, so that the circuit breaker main body can be efficiently overhauled and maintained; therefore, the circuit breaker main body is better in use effect and is more convenient and faster to replace, so that the convenience of the circuit breaker in use is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker for a ring main unit. Background Technique

[0002] A ring main unit is a set of power transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into a prefabricated sectionalized ring main unit power supply unit. Its core part uses a circuit breaker, which has the advantages of simple structure, small volume, low price, improved power supply parameters and performance, and power supply safety, etc., and realizes the functions of an intelligent power grid.

[0003] For example, the patent application No. CN216289851U discloses "a vacuum circuit breaker for a gas-insulated ring main unit" and specifically discloses that: the door panel assembly is clamped on the ring main unit assembly, the pulley assembly is fixedly connected to the bottom of the ring main unit assembly, the gas charging pipe assembly is fixedly connected to one side of the ring main unit assembly, the lock handle mechanism is rotatably connected to the other side of the ring main unit assembly, the elastic mechanism is fixedly connected to the inside of the ring main unit assembly, and the vacuum circuit breaker assembly is slidably connected to the upper end of the elastic mechanism. However, when the circuit breaker is in use, due to frequent opening and closing, wear of the operating mechanism, and the influence of environmental conditions on the protection characteristics, the circuit breaker is prone to damage. In the above technology, when in use, since it is inconvenient to perform convenient replacement processing on the circuit breaker, the replacement of the circuit breaker after damage is more cumbersome, thereby reducing the convenience of the circuit breaker in use. Therefore, the utility model proposes a circuit breaker for a ring main unit to solve the above problems. Content of the Utility Model

[0004] In view of the above problems, the utility model proposes a circuit breaker for a ring main unit to solve the problem that it is inconvenient to perform convenient replacement processing on the circuit breaker in the above technology, resulting in more cumbersome replacement of the circuit breaker after damage, thereby reducing the convenience of the circuit breaker in use.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: A circuit breaker for a ring main unit includes a bottom plate, a buffer mechanism is arranged at the top end of the bottom plate, a mounting plate is installed at the top end of the buffer mechanism, a mounting cavity is installed at the top end of the mounting plate, a connection mechanism is arranged inside the mounting cavity, and a circuit breaker main body is installed at the top end of the connection mechanism;

[0006] The connection mechanism includes a mounting seat, a connection block, a positioning hole and a positioning structure. The mounting seat is installed at the bottom end inside the mounting cavity. A connection block is arranged inside the mounting seat. The top end of the connection block extends to the outside of the mounting cavity. The top end of the connection block is connected to the bottom end of the circuit breaker main body. A positioning hole is opened inside the connection block.

[0007] A further improvement lies in that: the positioning structure includes a cavity, a fixing pin and a telescopic spring. The cavity is installed on one side of the installation cavity. A fixing pin is penetrated through the interior of the cavity. One end of the fixing pin extends into the positioning hole. A telescopic spring is arranged on the outer side wall of the fixing pin, and the telescopic spring is installed inside the cavity.

[0008] A further improvement lies in that: the outer diameter of the fixing pin is smaller than the inner diameter of the positioning hole, and a combined structure is formed between the positioning hole and the fixing pin.

[0009] A further improvement lies in that: the buffer mechanism includes a fixed cavity, a damper, a movable plate, a return spring, a hinged rod, a moving plate, a transmission rod and a limiting structure. The fixed cavity is installed at the top end of the bottom plate. Dampers are installed below both sides inside the fixed cavity. One end of each damper is installed with a movable plate. A return spring is installed on the inner side of the movable plate. A hinged rod is hinged to the top end of the movable plate. A moving plate is hinged to the top end of the hinged rod. A transmission rod is installed at the top end of the moving plate, and the top end of the transmission rod extends outside the fixed cavity, and the top end of the transmission rod is connected to the bottom end of the mounting plate.

[0010] A further improvement lies in that: the limiting structure includes a limiting rod and a limiting sleeve. The limiting rods are installed on both sides inside the fixed cavity. A limiting sleeve is arranged on the outer side wall of the limiting rod, and one end of the limiting sleeve is connected to one side of the moving plate.

[0011] A further improvement lies in that: the cross-section of the limiting rod is smaller than the cross-section of the limiting sleeve, and a sliding structure is formed between the limiting rod and the limiting sleeve.

[0012] The beneficial effects of the present utility model are as follows: by arranging a connection mechanism inside the installation cavity, and through the mutual cooperation among the mounting seat, connection block, positioning hole, cavity, fixing pin and telescopic spring of the connection mechanism, the breaker main body can be conveniently disassembled and installed, so that the breaker main body can be efficiently overhauled and maintained, making the breaker main body have a better effect during use, and also making the replacement of the breaker main body more convenient and fast, thus greatly improving the convenience of the breaker during use; by arranging a buffer mechanism, and through the mutual cooperation among the fixed cavity, damper, movable plate, return spring, hinged rod, moving plate, transmission rod, limiting rod and limiting sleeve of the buffer mechanism, the breaker main body can be buffered during use, and further shock-absorbing protection is provided for the breaker main body, making the breaker main body not easily damaged during use, thereby extending the service life of the breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the overall structural schematic diagram of the present utility model;

[0014] Figure 2Front view sectional structure schematic diagram of the connection mechanism of the present utility model;

[0015] Figure 3 Of the present utility model Figure 2 Partial enlarged structure schematic diagram at position A in it;

[0016] Figure 4 Of the present utility model Figure 2 Partial enlarged structure schematic diagram at position B in it.

[0017] Wherein: 1, bottom plate; 2, mounting plate; 3, mounting cavity; 4, circuit breaker body; 5, mounting seat; 6, connecting block; 7, positioning hole; 8, cavity; 9, fixing pin; 10, telescopic spring; 11, fixing cavity; 12, damper; 13, movable plate; 14, return spring; 15, hinged rod; 16, moving plate; 17, transmission rod; 18, limiting rod; 19, limiting sleeve. Specific implementation manner

[0018] In order to deepen the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model.

[0019] According to Figure 1 、 2 As shown in 、3、4, this embodiment provides a circuit breaker for a ring main unit, including a bottom plate 1, a buffer mechanism is arranged at the top of the bottom plate 1, a mounting plate 2 is installed at the top of the buffer mechanism, a mounting cavity 3 is installed at the top of the mounting plate 2, a connection mechanism is arranged inside the mounting cavity 3, and a circuit breaker body 4 is installed at the top of the connection mechanism.

[0020] The connecting mechanism includes a mounting base 5, a connecting block 6, a positioning hole 7 and a positioning structure. The mounting base 5 is installed at the bottom end inside the installation cavity 3. A connecting block 6 is arranged inside the mounting base 5. The top end of the connecting block 6 extends to the outside of the installation cavity 3. The top end of the connecting block 6 is connected to the bottom end of the circuit breaker body 4. A positioning hole 7 is formed inside the connecting block 6. The positioning structure includes a cavity 8, a fixing pin 9 and a telescopic spring 10. The cavity 8 is installed on one side of the installation cavity 3. The fixing pin 9 penetrates through the inside of the cavity 8. One end of the fixing pin 9 extends into the positioning hole 7. A telescopic spring 10 is arranged on the outer side wall of the fixing pin 9. The telescopic spring 10 is installed inside the cavity 8. The outer diameter of the fixing pin 9 is smaller than the inner diameter of the positioning hole 7. The positioning hole 7 and the fixing pin 9 form a latching structure. During use, the circuit breaker body 4 is taken out, and then the fixing pin 9 is pulled. The connecting block 6 is placed into the installation cavity 3. After the mounting base 5 and the connecting block 6 are engaged with each other, the fixing pin 9 is released. At this time, the telescopic spring 10 drives the fixing pin 9 to extend under the action of the elastic force, so that the fixing pin 9 is engaged with the positioning hole 7, completing the convenient installation of the circuit breaker body 4. When the circuit breaker body 4 needs to be disassembled, only the fixing pin 9 needs to be pulled to disengage the fixing pin 9 from the positioning hole 7, and then the connecting block 6 can be taken out of the installation cavity 3. The circuit breaker body 4 can be conveniently disassembled and installed, so that the circuit breaker body 4 can be efficiently overhauled and maintained, making the circuit breaker body 4 have a better effect during use and making the replacement of the circuit breaker body 4 more convenient and fast, thus greatly improving the convenience of the circuit breaker during use.

[0021] The buffer mechanism includes a fixed cavity 11, a damper 12, a movable plate 13, a return spring 14, a hinge rod 15, a moving plate 16, a transmission rod 17 and a limiting structure. The fixed cavity 11 is installed at the top end of the bottom plate 1. Dampers 12 are installed below both sides inside the fixed cavity 11. One end of each damper 12 is installed with a movable plate 13. A return spring 14 is installed inside the movable plate 13. The top end of the movable plate 13 is hinged with a hinge rod 15. The top end of the hinge rod 15 is hinged with a moving plate 16. A transmission rod 17 is installed at the top end of the moving plate 16. The top end of the transmission rod 17 extends to the outside of the fixed cavity 11. The top end of the transmission rod 17 is connected to the bottom end of the mounting plate 2. When the circuit breaker main body 4 is in use and is subjected to an external impact force, the transmission rod 17 moves downward, driving the hinge rod 15 to move. Therefore, the movable plate 13 moves to both sides. At this time, with the cooperation of the damper 12, the return spring 14 drives the movable plate 13 to move toward the middle under the action of the elastic force. Therefore, the hinge rod 15 is driven to move. Furthermore, under the limitation of the limiting rod 18 and the limiting sleeve 19, the hinge rod 15 drives the transmission rod 17 to move, alleviating the impact force received by the circuit breaker main body 4, thereby protecting the circuit breaker main body 4 and making the circuit breaker main body 4 not easily damaged during use, thus prolonging the service life of the circuit breaker.

[0022] The limiting structure includes a limiting rod 18 and a limiting sleeve 19. The limiting rods 18 are installed on both sides inside the fixed cavity 11. A limiting sleeve 19 is arranged on the outer side wall of each limiting rod 18. One end of the limiting sleeve 19 is connected to one side of the moving plate 16. The cross-sectional area of the limiting rod 18 is smaller than that of the limiting sleeve 19. A sliding structure is formed between the limiting rod 18 and the limiting sleeve 19. During use, with the mutual cooperation between the limiting rod 18 and the limiting sleeve 19, the movement of the moving plate 16 can be limited during movement, making the moving plate 16 more stable during movement.

[0023] Working principle: First, the operator takes out the circuit breaker main body 4, then pulls the fixing pin 9, places the connecting block 6 into the interior of the installation cavity 3. After the mounting seat 5 and the connecting block 6 are engaged with each other, the fixing pin 9 is released. At this time, the telescopic spring 10 drives the fixing pin 9 to extend under the action of the elastic force, so that the fixing pin 9 is engaged with the positioning hole 7, completing the convenient installation of the circuit breaker main body 4. When it is necessary to disassemble the circuit breaker main body 4, just pull the fixing pin 9 to disengage the fixing pin 9 from the positioning hole 7, and then take out the connecting block 6 from the interior of the installation cavity 3. When the circuit breaker main body 4 is in use and is subjected to an external impact force, the transmission rod 17 moves downward, driving the articulated rod 15 to move. Therefore, the movable plate 13 moves to both sides. At this time, with the cooperation of the damper 12, the return spring 14 drives the movable plate 13 to move towards the middle under the action of the elastic force, so as to drive the articulated rod 15 to move. Furthermore, under the limitation of the limiting rod 18 and the limiting sleeve 19, the articulated rod 15 drives the transmission rod 17 to move, relieving the impact force received by the circuit breaker main body 4, and thus protecting the circuit breaker main body 4.

[0024] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker for a ring main unit, comprising a bottom plate (1), characterized in that: A buffer mechanism is provided at the top of the base plate (1), a mounting plate (2) is installed at the top of the buffer mechanism, a mounting cavity (3) is installed at the top of the mounting plate (2), a connecting mechanism is provided inside the mounting cavity (3), and a circuit breaker body (4) is installed at the top of the connecting mechanism; The connection mechanism comprises a mounting seat (5), a connection block (6), a positioning hole (7) and a positioning structure; the mounting seat (5) is mounted at the bottom end of the mounting cavity (3); a connection block (6) is arranged inside the mounting seat (5); the top end of the connection block (6) extends to the outside of the mounting cavity (3); the top end of the connection block (6) is connected to the bottom end of the circuit breaker body (4); and a positioning hole (7) is provided inside the connection block (6).

2. A circuit breaker for a ring main unit according to claim 1, characterized in that: The positioning structure comprises a cavity (8), a fixing pin (9) and a telescopic spring (10); the cavity (8) is installed on one side of the installation cavity (3); a fixing pin (9) is arranged through the cavity (8); one end of the fixing pin (9) extends to the inside of the positioning hole (7); a telescopic spring (10) is arranged on the outer wall of the fixing pin (9); and the telescopic spring (10) is installed inside the cavity (8).

3. A circuit breaker for a ring main unit according to claim 2, characterized in that: The outer diameter of the fixing pin (9) is smaller than the inner diameter of the positioning hole (7), and a combined structure is formed between the positioning hole (7) and the fixing pin (9).

4. A circuit breaker for a ring main unit according to claim 1, characterized in that: The buffer mechanism comprises a fixed cavity (11), a damper (12), a movable plate (13), a return spring (14), a hinged rod (15), a movable plate (16), a transmission rod (17) and a limiting structure. The fixed cavity (11) is installed at the top of the base plate (1). The dampers (12) are installed below the two sides of the fixed cavity (11). The movable plate (13) is installed at one end of the damper (12). The inner side of the movable plate (13) is installed with a return spring (14). The top of the movable plate (13) is hinged with a hinged rod (15). The top of the hinged rod (15) is hinged with the movable plate (16). The top of the movable plate (16) is installed with a transmission rod (17). The top of the transmission rod (17) extends to the outside of the fixed cavity (11). The top of the transmission rod (17) is connected to the bottom of the mounting plate (2).

5. A circuit breaker for a ring main unit according to claim 4, characterized in that: The limiting structure comprises a limiting rod (18) and a limiting sleeve (19); the limiting rod (18) is installed on both sides of the fixed cavity (11); the outer wall of the limiting rod (18) is provided with a limiting sleeve (19); one end of the limiting sleeve (19) is connected to one side of the movable plate (16).

6. A circuit breaker for a ring main unit according to claim 5, characterized in that: The cross section of the limiting rod (18) is smaller than the cross section of the limiting sleeve (19), and a sliding structure is formed between the limiting rod (18) and the limiting sleeve (19).

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