Vacuum circuit breaker with safety structure

Abstract

The utility model discloses a vacuum circuit breaker with insurance structure belongs to vacuum circuit breaker field, including vacuum circuit breaker body, set up the installation mechanism cooperation vacuum circuit breaker body's use, will mount pad be fixed to the position of vacuum circuit breaker body installation in advance, when installing vacuum circuit breaker body, make the plug -in board through the spigot and insert into the mount pad, push the press lever through the connecting rod and push the movable plate, make the movable plate follow the guide rod and move through the guide hole, and force the spring to make the shrinkage operation, let the card board pass through the strip mouth and insert into the bayonet, after the press lever cannot push, the movable block is removed to the left side and makes the limiting rod insert into the press lever, and the press lever is limited, can complete the installation and fixed of vacuum circuit breaker body, compared with the traditional bolt fixed mode, can reach the purpose of being convenient for the quick disassembly of vacuum circuit breaker body, makes the installation and disassembly process of vacuum circuit breaker body become convenient, need not use special tool.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breakers, and in particular to a vacuum circuit breaker with a safety structure. Background Technology

[0002] A vacuum circuit breaker with integrated fuse is a composite electrical device that combines a vacuum circuit breaker with a fuse (such as a fuse). It uses vacuum as the arc-extinguishing and insulating medium, leveraging the vacuum circuit breaker's ability to quickly interrupt fault currents (such as short-circuit currents) to ensure circuit safety. Simultaneously, it integrates a fuse; when an overload or minor short-circuit fault occurs in the circuit, the fuse (such as a fuse) melts due to the current exceeding its rated value, cutting off the circuit and providing dual protection. This design leverages the advantages of vacuum circuit breakers—high breaking capacity and long lifespan—while compensating for their shortcomings in overload protection sensitivity or protection range in specific scenarios. It provides more comprehensive and reliable electrical protection for power systems and is widely used in industrial and commercial buildings and power distribution systems, effectively reducing equipment damage and power outages.

[0003] Existing vacuum circuit breakers present numerous inconveniences in practical applications, particularly when installed outdoors, where they are typically secured with bolts. This method is highly susceptible to rusting due to the complex and variable outdoor environment, particularly from rain and moisture. Rusting not only compromises the stability of the vacuum circuit breaker installation but also creates significant difficulties for subsequent maintenance and replacement. Installation and disassembly require specialized tools and involve cumbersome procedures. Especially when repairing or replacing the vacuum circuit breaker, removing it is time-consuming and labor-intensive due to rusted bolts and operational difficulties, resulting in extremely low efficiency. This not only increases maintenance costs but can also disrupt the normal operation of the power system due to prolonged repair times, causing unnecessary losses for users. Utility Model Content

[0004] The main objective of this invention is to provide a vacuum circuit breaker with a safety structure, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A vacuum circuit breaker with a safety structure includes a vacuum circuit breaker body. A fuse is provided on the top surface of the vacuum circuit breaker body. The vacuum circuit breaker body is fixedly connected to the top surface of a mounting base via a mounting mechanism. The mounting mechanism includes a guide rod, a spring, a movable plate, a locking plate, a pressing rod, a connecting rod, and a movable block. The guide rod is fixedly connected between an inner plate and a protrusion block inside the mounting base, and the spring is sleeved on the outside of the guide rod. The movable plate is movably connected to the guide rod through a guide hole on the side wall, and the locking plate is fixedly connected to the side wall of the movable plate. The connecting rod is movably connected between the movable plate and the pressing rod via rotating rods at both ends, and the movable block is movably connected to the front end of the mounting base via a T-shaped slider at the rear end, and is fixedly connected to the pressing rod via a limiting rod on the side wall.

[0007] As a preferred technical solution of this utility model, a set of symmetrical insert plates are fixedly installed on the bottom surface of the vacuum circuit breaker body, and the side walls of the insert plates are provided with slots.

[0008] As a preferred embodiment of this utility model, the mounting base has an internal cavity and a set of symmetrical slots on its top surface.

[0009] As a preferred embodiment of this utility model, a set of symmetrical inner plates are fixedly installed inside the cavity, and the side walls of the inner plates are provided with slots that penetrate the mounting base. Two sets of symmetrical protrusions are also fixedly installed on the inner wall of the cavity, and a through hole communicating with the cavity is provided on the front wall of the mounting base. Guide blocks are fixedly installed on both sides of the inner wall of the through hole, and a T-shaped groove is also provided on the front wall of the mounting base located on the right side of the through hole.

[0010] As a preferred embodiment of this utility model, the guide rod is fixedly installed between the inner plate and the protruding block, and the spring is sleeved on the outside of the guide rod. The movable plate is movably installed with the guide rod through the guide hole opened on the side wall, and the spring is also fixedly installed between the opposite surfaces of the inner plate and the movable plate. The clamping plate is fixedly installed on the outer side wall of the movable plate. The pressing rod is inserted into the through hole, and the side wall of the pressing rod is provided with a limit hole. The two side walls of the pressing rod are respectively provided with guide grooves corresponding to the guide block. The rear ends of the two side walls of the pressing rod and the inner side wall of the movable plate are respectively fixedly installed with concave blocks. The top and bottom surfaces of the concave blocks are respectively provided with rotating holes, and a set of symmetrical rotating rods are fixedly installed at both ends of the connecting rod and movably installed in the rotating holes.

[0011] As a preferred embodiment of this utility model, a T-shaped slider is fixedly installed on the rear end wall of the movable block, and the T-shaped slider is movably installed in the T-shaped groove. A limit rod is fixedly installed on the left side wall of the movable block, and the limit rod is inserted into the limit hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, the installation mechanism, in conjunction with the vacuum circuit breaker body, pre-fixes the mounting base to the position where the vacuum circuit breaker body will be installed. During installation, the insert plate is inserted into the mounting base through the socket. The pressing rod is then pushed through the connecting rod to move the movable plate, causing it to move along the guide rod through the guide hole. This forces the spring to tighten, allowing the locking plate to pass through the slot and insert into the locking socket. Once the pressing rod can no longer be pushed, the movable block is moved to the left, causing the limiting rod to insert into the pressing rod, thus restricting the pressing rod and completing the installation and fixing of the vacuum circuit breaker body. Compared to the traditional bolt-fixing method, this design facilitates quick installation and disassembly of the vacuum circuit breaker body, making the installation and disassembly process convenient. No special tools are required; installation and disassembly can be completed with simple operations. This convenient operation significantly saves installation and disassembly time, reduces manpower, and improves work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the vacuum circuit breaker body of this utility model;

[0016] Figure 3 This is a cross-sectional schematic diagram of the mounting base of this utility model;

[0017] Figure 4 This is a structural breakdown diagram of the installation mechanism of this utility model;

[0018] Figure 5 This is a plan view sectional diagram of the installation mechanism of this utility model.

[0019] In the diagram: 1. Vacuum circuit breaker body; 2. Fuse; 3. Mounting base; 4. Mounting mechanism; 5. Insert plate; 6. Bayonet; 7. Inner cavity; 8. Insertion port; 9. Inner plate; 10. Slot; 11. Protrusion block; 12. Through hole; 13. Guide block; 14. T-shaped slide groove; 15. Guide rod; 16. Spring; 17. Movable plate; 18. Guide hole; 19. Clamping plate; 20. Pressing rod; 21. Limiting hole; 22. Guide groove; 23. Concave block; 24. Rotating hole; 25. Connecting rod; 26. Rotating rod; 27. Movable block; 28. T-shaped slider; 29. ​​Limiting rod. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0021] like Figure 1 - Figure 5 As shown, a vacuum circuit breaker with a safety structure includes a vacuum circuit breaker body 1. A fuse 2 is provided on the top surface of the vacuum circuit breaker body 1. The vacuum circuit breaker body 1 is fixedly connected to the top surface of the mounting base 3 through a mounting mechanism 4. The mounting mechanism 4 includes a guide rod 15, a spring 16, a movable plate 17, a clamping plate 19, a pressing rod 20, a connecting rod 25, and a movable block 27. The guide rod 15 is fixedly connected between the inner plate 9 and the protrusion 11 inside the mounting base 3, and the spring 16 is sleeved on the outside of the guide rod 15. The movable plate 17 is movably connected to the guide rod 15 through a guide hole 18 on the side wall, and the clamping plate 19 is fixedly connected to the side wall of the movable plate 17. The connecting rod 25 is movably connected between the movable plate 17 and the pressing rod 20 through rotating rods 26 at both ends, and the movable block 27 is movably connected to the front end of the mounting base 3 through a T-shaped slider 28 at the rear end, and is fixedly connected to the pressing rod 20 through a limiting rod 29 on the side wall.

[0022] like Figure 2 As shown, a set of symmetrical insert plates 5 are fixedly installed on the bottom surface of the vacuum circuit breaker body 1, and a slot 6 is provided on the side wall of the insert plate 5. The insert plate 5 and the slot 6 on the side wall are used to cooperate with the vacuum circuit breaker body 1 to achieve quick installation and fixation.

[0023] like Figure 3 As shown, the mounting base 3 has an inner cavity 7 inside, and the top surface of the mounting base 3 also has a set of symmetrical sockets 8. The inner cavity 7 is used to accommodate the various components of the mounting mechanism 4 and provide movement space, while the sockets 8 are used to cooperate with the plug plate 5 to realize the quick positioning and installation of the vacuum circuit breaker body 1.

[0024] like Figure 3As shown, a set of symmetrical inner plates 9 are fixedly installed inside the inner cavity 7, and a slot 10 is provided on the side wall of the inner plate 9 to pass through the mounting base 3. The slot 10 provides a moving channel for the clamping plate 19, allowing the clamping plate 19 to pass through the inner plate 9 and cooperate with the slot 6 on the insert plate 5 to achieve a tight clamping fixation. Two sets of symmetrical protrusions 11 are also fixedly installed on the inner wall of the inner cavity 7, which, together with the inner plate 9, provide a fixed support point for the guide rod 15 to ensure the stability of the guide rod 15. The front wall of the mounting base 3 is provided with a through hole 12 communicating with the inner cavity 7. The through hole 12 provides a mounting and moving space for the pressing rod 20. The moving channel allows the pressing rod 20 to move back and forth within the perforation 12, thereby driving the connecting rod 25 and the movable plate 17 to move. Guide blocks 13 are fixedly installed on both sides of the inner wall of the perforation 12, which cooperate with the guide grooves 22 on the side walls of the pressing rod 20 to guide and ensure that the pressing rod 20 maintains a straight line during movement, avoids deviation, and plays a role in limiting movement. A T-shaped slide groove 14 is also provided on the front wall of the mounting base 3 and on the right side of the perforation 12 to provide a sliding track for the T-shaped slider 28 on the rear wall of the movable block 27, so that the movable block 27 can move left and right.

[0025] like Figure 4 and Figure 5 As shown, the guide rod 15 is fixedly installed between the inner plate 9 and the protrusion 11, and the spring 16 is fitted onto the outside of the guide rod 15. The movable plate 17 is movably installed with the guide rod 15 through the guide hole 18 opened on the side wall, and the spring 16 is also fixedly installed between the opposing surfaces of the inner plate 9 and the movable plate 17. The clamping plate 19 is fixedly installed on the outer side wall of the movable plate 17. The pressing rod 20 is inserted into the through hole 12, and the side wall of the pressing rod 20 is provided with a limit hole 21. The two side walls of the pressing rod 20 are also provided with guide grooves 22 corresponding to the guide block 13, and the rear ends of the two side walls of the pressing rod 20 and the inner side wall of the movable plate 17 are also provided with guide grooves 22. Concave blocks 23 are fixedly installed on the top and bottom surfaces of the concave blocks 23, respectively. Rotating holes 24 are opened on the top and bottom surfaces of the connecting rods 25. A set of symmetrical rotating rods 26 are fixedly installed at both ends of the connecting rods 25 and movably installed in the rotating holes 24. When the pressing rod 20 is pressed, it will enter into the mounting base 3 and force the connecting rods 25 on both sides to tilt and push the movable plate 17 outward. The movable plate 17 moves along the guide rod 15 through the guide hole 18 and then forces the spring 16 to perform a tightening operation until the clamping plate 19 passes through the slot 10 and is inserted into the slot 6. Thus, the vacuum circuit breaker body 1 can be quickly installed and fixed on the mounting base 3.

[0026] like Figure 4 and Figure 5As shown, a T-shaped slider 28 is fixedly installed on the rear wall of the movable block 27, and the T-shaped slider 28 is movably installed in the T-shaped groove 14. A limit rod 29 is fixedly installed on the left side wall of the movable block 27, and the limit rod 29 is inserted into the limit hole 21. Pushing the movable block 27 causes the T-shaped slider 28 to slide in the through hole 12. After the limit rod 29 is inserted into the limit hole 21, it can limit the pressing rod 20 and prevent the pressing rod 20 from moving forward due to the rebound force of the spring 16, causing the card plate 19 to fall out of the slot 6.

[0027] The operating principle of this vacuum circuit breaker with a safety mechanism is as follows:

[0028] When installing the vacuum circuit breaker body 1, insert the insertion plate 5 on the bottom surface of the vacuum circuit breaker body 1 into the insertion slot 8 on the top surface of the mounting base 3, and then push the protruding pressing rod 20 located at the front end of the mounting base 3. The pressing rod 20 will pass through the guide grooves 22 on both sides and enter the inner cavity 7 along the guide blocks 13 installed on both sides of the through hole 12 on the front wall of the mounting base 3. As the pressing rod 20 moves backward into the inner cavity 7, the symmetrical rotating rods 26 installed at both ends of the connecting rods 25 on both sides of the pressing rod 20 will rotate within the rotating holes 24 on the top and bottom surfaces of the opposing concave blocks 23 installed on both sides of the pressing rod 20 and the inner wall of the movable plate 17. The connecting rod 25 tilts, causing the angle between the connecting rods 25 to gradually increase. During this process, the connecting rod 25 pushes the movable plates 17 on both sides to move outward. The movable plates 17 move outward through the guide holes 18 on the side walls, along the guide rods 15 installed between the inner plate 9 and the protrusion 11 in the inner cavity 7, forcing the springs 16 on the outside of the guide rods 15 to tighten until the locking plate 19 passes through the slot 10 on the side wall of the inner plate 9 and is inserted into the slot 6 on the side wall of the insert plate 5. At the same time, with the cooperation of the guide block 13 and the guide groove 22, the operator can no longer press the pressing rod 20 backward. Maintaining the pushing force on the pressing rod 20 unchanged, the movable block 27 is pushed to the left. The T-shaped slider 28 installed on the rear wall of the movable block 27 will slide within the T-shaped groove 14 opened on the front wall of the mounting base 3 until the limiting rod 29 installed on the left side wall of the movable block 27 is inserted and passes through the limiting hole 21 opened on the side wall of the pressing rod 20. Therefore, the pressing rod 20 can be restricted, and the installation operation of the vacuum circuit breaker body 1 can be completed. When it is necessary to disassemble and maintain the vacuum circuit breaker body 1, simply move the movable block 27 to the right so that the limiting rod 29 moves out of the limiting hole 21. The elastic recovery extension force of the spring 16 will push the pressing rod 28 to the left. The movable plate 17 moves inward, causing the connecting rod 25 to tilt and the angle between them to decrease. Then, the pressing rod 20 is pushed forward until the clamping plate 19 is removed from the clamping slot 6. The vacuum circuit breaker body 1 can then be removed from the mounting base 3. Compared with the traditional bolt fixing method, this method facilitates the quick installation and removal of the vacuum circuit breaker body 1. This makes the installation and removal process of the vacuum circuit breaker body 1 more convenient. No special tools are required. The installation and removal of the vacuum circuit breaker body 1 can be completed with simple operations. The convenient operation method greatly saves installation and removal time, reduces manpower input, and improves work efficiency.

[0029] The existing vacuum circuit breaker body utilizes vacuum as the arc-extinguishing and insulating medium. Its core component, the vacuum interrupter chamber, is in a high vacuum state. When the circuit is working normally, the moving and stationary contacts of the circuit breaker are in the closed state, and the current can pass smoothly to supply power to the load. When a fault occurs in the circuit, the fault current will increase rapidly. At this time, the operating component receives a signal from the protection device and drives the moving contact to move rapidly, causing the moving and stationary contacts to separate. At the moment of contact separation, an electric arc will be generated between the contacts. Due to the excellent insulation and arc-extinguishing performance of the vacuum environment, the electric arc will quickly spread, cool and extinguish in the vacuum interrupter chamber, thereby quickly cutting off the fault current and protecting the safety of the circuit and equipment.

[0030] As an existing technology, fuse 2 is a simple and effective overcurrent protection device. It mainly consists of a fuse element, a fuse wire, and a fuse tube. The fuse element is the core component of the fuse and is usually made of a metal material with high resistivity and low melting point, such as lead-tin alloy or zinc. When the circuit is working normally, the current passing through the fuse element is within its rated current range, and the fuse element will not melt, and the circuit remains conductive. When a short circuit or severe overload occurs in the circuit, the current will increase sharply and exceed the rated current of the fuse element. At this time, the fuse element will heat up rapidly due to the thermal effect of the current. When the temperature reaches the melting point of the fuse element, the fuse element will melt and break the circuit, thereby cutting off the circuit and playing a protective role.

[0031] When a short circuit fault occurs in the circuit, the short circuit current will be very large. Fuse 2 can respond quickly, and the fusible element melts in a very short time, interrupting the short circuit current and preventing the short circuit current from causing serious damage to the circuit and equipment, thus playing a protective role for the vacuum circuit breaker body 1.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A vacuum circuit breaker with a fuse structure, comprising a vacuum circuit breaker body (1), wherein a fuse (2) is provided on the top surface of the vacuum circuit breaker body (1), characterized in that: The vacuum circuit breaker body (1) is fixedly connected to the top surface of the mounting base (3) by the mounting mechanism (4), and the mounting mechanism (4) includes a guide rod (15), a spring (16), a movable plate (17), a clamping plate (19), a pressing rod (20), a connecting rod (25), and a movable block (27). The guide rod (15) is fixedly connected between the inner plate (9) and the protrusion (11) inside the mounting base (3), and the spring (16) is sleeved on the outside of the guide rod (15). The movable plate (17) is movably connected to the guide rod (15) through the guide hole (18) on the side wall, and the clamping plate (19) is fixedly connected to the side wall of the movable plate (17). The connecting rod (25) is movably connected between the movable plate (17) and the pressing rod (20) through the rotating rods (26) at both ends, and the movable block (27) is also connected to the guide rod (15). The T-shaped slider (28) at the rear end is movably connected to the front end of the mounting base (3), and is fixedly connected to the pressing rod (20) by the limiting rod (29) on the side wall.

2. A vacuum circuit breaker with a safety structure according to claim 1, characterized in that: A set of symmetrical insert plates (5) are fixedly installed on the bottom surface of the vacuum circuit breaker body (1), and a bayonet (6) is provided on the side wall of the insert plate (5).

3. A vacuum circuit breaker with a safety structure according to claim 2, characterized in that: The mounting base (3) has an inner cavity (7) inside, and a set of symmetrical slots (8) are also provided on the top surface of the mounting base (3).

4. A vacuum circuit breaker with a safety structure according to claim 3, characterized in that: A set of symmetrical inner plates (9) are fixedly installed inside the inner cavity (7), and a slot (10) through the mounting base (3) is opened on the side wall of the inner plate (9). Two sets of symmetrical protrusions (11) are also fixedly installed on the inner wall of the inner cavity (7), and a through hole (12) communicating with the inner cavity (7) is opened on the front wall of the mounting base (3). Guide blocks (13) are fixedly installed on both sides of the inner wall of the through hole (12). A T-shaped groove (14) is also opened on the front wall of the mounting base (3) and located on the right side of the through hole (12).

5. A vacuum circuit breaker with a safety structure according to claim 4, characterized in that: The guide rod (15) is fixedly installed between the inner plate (9) and the protrusion (11), and the spring (16) is fitted on the outside of the guide rod (15). The movable plate (17) is movably installed with the guide rod (15) through the guide hole (18) opened on the side wall, and the spring (16) is also fixedly installed between the opposite surfaces of the inner plate (9) and the movable plate (17). The clamping plate (19) is fixedly installed on the outer side wall of the movable plate (17). The pressing rod (20) is inserted into the through hole (12), and the pressing rod... Limiting holes (21) are provided on the side wall of (20). Guide grooves (22) corresponding to guide blocks (13) are also provided on the two side walls of the pressing rod (20). Concave blocks (23) are fixedly installed on the rear end of the two side walls of the pressing rod (20) and the inner side wall of the movable plate (17). Rotating holes (24) are provided on the top and bottom surfaces of the concave blocks (23). A set of symmetrical rotating rods (26) are fixedly installed at both ends of the connecting rod (25) and movably installed in the rotating holes (24).

6. A vacuum circuit breaker with a safety structure according to claim 5, characterized in that: A T-shaped slider (28) is fixedly installed on the rear wall of the movable block (27), and the T-shaped slider (28) is movably installed in the T-shaped groove (14). A limit rod (29) is fixedly installed on the left side wall of the movable block (27), and the limit rod (29) is inserted into the limit hole (21).

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