A medium voltage vacuum circuit breaker

Abstract

The utility model relates to the field of electric power equipment, concretely is a kind of medium voltage vacuum circuit breaker, including mechanism box, three groups of mounting seat are fixedly installed in mechanism box top end, the outer side of mounting seat top protruding block is movably sleeved with sealing ring, three groups of mounting seat are respectively fixedly installed with arc extinguishing subassembly by four groups of fixed bolts, the mounting base of arc extinguishing subassembly is provided with sealing groove, the upper end of sealing ring is slidably connected in sealing groove, the mounting base of arc extinguishing subassembly is provided with camber, a group of rustproof parts is cooperatively installed on fixed bolt;The utility model is assembled, when arc extinguishing subassembly is stably fixed and installed on mounting seat top end, it can cause extrusion to sealing ring, so that mounting seat top and arc extinguishing subassembly bottom keep good sealing property by sealing ring;When sealing ring needs to be replaced when aging, after arc extinguishing subassembly is disassembled, sealing ring can be directly taken down, directly replace, and it is convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of power equipment, specifically a medium-voltage vacuum circuit breaker. Background Technology

[0002] Medium-voltage vacuum circuit breakers are key protection and control devices in medium-voltage power systems and are widely used in power distribution networks, industrial power distribution systems and other scenarios. Their main function is to quickly cut off fault current when a circuit fault occurs, so as to ensure the safe and stable operation of the power system.

[0003] Existing medium-voltage vacuum circuit breaker technologies, such as the combined medium-voltage vacuum circuit breaker disclosed in CN219393254U, involve a fixed assembly connecting the arc-extinguishing component, protective cover, and mechanism box. This fixed assembly is connected to the arc-extinguishing component via fastening bolts. The lower end of the arc-extinguishing component is protected by a sealing cover, with gaskets and fastening bolts positioned below the protective cover. A sealing cover is also fitted onto the fixed assembly above the bottom of the arc-extinguishing component, allowing rainwater to flow from the top of the sealing cover to its bottom. The sealing ring also enhances the sealing at the connection between the arc-extinguishing component and the sealing cover, providing good waterproofing and preventing the fastening bolts from aging, thus increasing the service life of the fixed assembly. However, with prolonged use, the sealing ring gradually ages, reducing its sealing performance. When replacement is needed, the sealing ring is stuck inside the inner ring of the sealing cover through a hole, making direct removal and replacement inconvenient. Therefore, we propose a medium-voltage vacuum circuit breaker. Utility Model Content

[0004] The purpose of this utility model is to provide a medium-voltage vacuum circuit breaker, including a mechanism box. Three sets of mounting seats are fixedly installed on the top of the mechanism box. A sealing ring is movably fitted on the outer side of the top protrusion of the mounting seat. An arc extinguishing component is fixedly installed on each of the three sets of mounting seats by four sets of fixing bolts. The mounting base of the arc extinguishing component has a sealing groove. The upper end of the sealing ring is slidably engaged in the sealing groove. An arc surface is provided on the mounting base of the arc extinguishing component. A set of anti-rust parts is installed on the fixing bolts.

[0005] Preferably, the fixing bolt is threaded to the inner side of the mounting base in the arc extinguishing assembly, and the fixing bolt is threaded to the threaded hole on the mounting base.

[0006] Preferably, the rust-proof component includes a rust-proof sleeve and a sealing bevel gasket. The rust-proof sleeve is fitted onto the hexagonal head of the fixing bolt. The inner side of the sealing ring gasket is provided with an inclined surface. The sealing bevel gasket is fixedly installed at the bottom of the rust-proof sleeve.

[0007] Preferably, a set of inclined rings is fixedly installed on the mounting base of each of the three sets of arc extinguishing components, and the inclined surface of the inclined ring is in contact with the inclined surface provided on the inner side of the sealing ring gasket.

[0008] Preferably, a set of handles is fixedly installed at each end of the mechanism box, and two sets of lifting rings are respectively provided through the two sets of handles.

[0009] Preferably, the bottom of the mechanism box is fixedly equipped with two sets of mounting base plates, and the mounting base plates are provided with two sets of mounting connection holes.

[0010] Preferably, the mechanism box is equipped with a circuit breaker indicator needle and an operating handle.

[0011] Preferably, the mechanism box is provided with heat dissipation holes, the inner cavity of the heat dissipation holes is interconnected with the inner cavity of the mechanism box, and a dustproof net is fixedly installed on the heat dissipation holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. During assembly, when the arc-extinguishing component is stably fixed on the top of the mounting base, it will compress the sealing ring, thereby maintaining a good seal between the top of the mounting base and the bottom of the arc-extinguishing component. When the sealing ring ages and needs to be replaced, the arc-extinguishing component can be disassembled and the sealing ring can be removed directly for replacement, which is convenient.

[0014] 2. After the mounting base and the arc-extinguishing component are securely fixed together with the fixing bolts, the anti-rust component is fitted onto the hexagonal head of the fixing bolt. When the hexagonal head of the fixing bolt is inserted into the hexagonal groove inside the anti-rust sleeve, the inclined surface on the inner side of the sealing gasket will tightly fit against the inclined ring. The anti-rust sleeve is made of plastic, and the sealing gasket is made of rubber. By compressing the sealing gasket, a good seal is maintained between the inclined ring and the anti-rust component. This isolates the fixing bolt from the outside environment through the anti-rust component, thus preventing rust from entering the fixing bolt. Furthermore, the inclined ring has an upward slope, preventing rainwater from penetrating along the upward slope, further waterproofing the bolt.

[0015] 3. This utility model is equipped with two sets of handles, which makes it easy for workers to move the medium-voltage vacuum circuit breaker. A lifting ring is provided through the handle to provide an additional lifting point for the lifting equipment, which facilitates the hoisting of the vacuum circuit breaker. Moreover, the lifting ring is provided on the handle, which fully enhances the function of the handle and eliminates the need to fix and install a lifting connection structure on the outside of the mechanism box. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of part of the structure of this utility model;

[0018] Figure 3 This is a sectional view of the rust-proof component;

[0019] Figure 4 This is a schematic diagram of the bottom of the arc-extinguishing assembly;

[0020] Figure 5 Exploded view of the mounting base and sealing ring;

[0021] Figure 6 for Figure 2 Schematic diagram of area A in the middle.

[0022] In the diagram: 1. Mechanism box; 2. Mounting base; 3. Sealing ring; 4. Fixing bolt; 5. Arc extinguishing assembly; 501. Sealing groove; 502. Arc surface; 503. Inclined ring; 6. Rust-proof parts; 601. Rust-proof sleeve; 602. Sealing gasket; 7. Lifting handle; 8. Lifting ring; 9. Mounting base plate; 10. Mounting connection hole; 11. Opening / closing indicator needle; 12. Operating handle; 13. Heat dissipation hole; 14. Dustproof net. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 - Figure 6 This utility model discloses a medium-voltage vacuum circuit breaker, comprising a mechanism box 1. Three sets of mounting seats 2 are fixedly installed on the top of the mechanism box 1. A sealing ring 3 is movably fitted on the outer side of the top protrusion of the mounting seat 2. Arc extinguishing components 5 are fixedly installed on the three sets of mounting seats 2 by four sets of fixing bolts 4. The mounting base of the arc extinguishing component 5 has a sealing groove 501. The upper end of the sealing ring 3 is slidably engaged in the sealing groove 501. An arc surface 502 is provided on the mounting base of the arc extinguishing component 5. A set of anti-rust parts 6 are installed on the fixing bolts 4.

[0025] The fixing bolt 4 is threaded to the inner side of the mounting base in the arc extinguishing assembly 5, and the fixing bolt 4 is threaded to the threaded hole opened on the mounting seat 2; during installation, the fixing bolt 4 simultaneously threads to the mounting seat 2 and the mounting base of the arc extinguishing assembly 5, thereby stably fixing the arc extinguishing assembly 5 on the top of the mounting seat 2.

[0026] The rust-proof component 6 includes a rust-proof sleeve 601 and a sealing inclined gasket 602. The rust-proof sleeve 601 is fitted onto the hexagonal head of the fixing bolt 4. The sealing ring gasket 602 has an inclined surface on its inner side and is fixedly installed at the bottom of the rust-proof sleeve 601. The rust-proof component 6 consists of two parts: the rust-proof sleeve 601 and the sealing inclined gasket 602. After the mounting base 2 and the arc-extinguishing component 5 are stably fixed together by the fixing bolt 4, the rust-proof component 6 is fitted onto the hexagonal head of the fixing bolt 4. When the hexagonal head of the fixing bolt 4 is inserted into the hexagonal groove in the rust-proof sleeve 601, the inclined surface on the inner side of the sealing inclined gasket 602 will tightly fit the inclined ring 503. The rust-proof sleeve 601 is made of plastic and the sealing inclined gasket 602 is made of rubber. Thus, the rust-proof component 6 isolates the fixing bolt 4 from the outside world and can prevent the fixing bolt 4 from rusting.

[0027] Each of the three sets of arc-extinguishing components 5 has a set of inclined rings 503 fixedly installed on its mounting base. The inclined surface of the inclined ring 503 fits against the inclined surface of the inner side of the sealing ring gasket 602. The inclined ring 503 surrounds the threaded hole that runs through the mounting base of the arc-extinguishing component 5. The inclined surface of the inclined ring 503 fits tightly against the inclined surface of the inner side of the sealing gasket 602. By squeezing the sealing gasket 602, the inclined ring 503 and the anti-rust component 6 maintain a good seal. The inclined surface of the inclined ring 503 is inclined from bottom to top, which prevents rainwater from penetrating along the inclined surface from bottom to top, further waterproofing the device.

[0028] A set of handles 7 is fixedly installed at each end of the mechanism box 1. Two sets of lifting rings 8 are respectively opened through the two sets of handles 7. The two sets of handles 7 facilitate the movement of medium-voltage vacuum circuit breakers by the staff. The lifting rings 8 are opened through the handles 7 to provide additional lifting points for the lifting equipment, which facilitates the hoisting of vacuum circuit breakers. Moreover, the lifting rings 8 are opened on the handles 7, which fully enhances the function of the handles 7 and eliminates the need to fix and install a lifting connection structure on the outside of the mechanism box 1.

[0029] Two sets of mounting base plates 9 are fixedly installed at the bottom of the mechanism box 1. Two sets of mounting connection holes 10 are opened through the mounting base plates 9. By placing the mounting base plate 9 at the bottom of the medium-voltage vacuum circuit breaker on the mounting frame at the installation site, the medium-voltage vacuum circuit breaker can be fixedly installed in a suitable position by using the mounting connection holes 10 on the mounting base plate 9 and the bolts.

[0030] The mechanism box 1 is equipped with a closing / opening indicator 11 and an operating handle 12. The operating handle 12, the closing / opening indicator 11, and the arc-extinguishing assembly 5 share the same transmission mechanism. This transmission mechanism is typically complex, and its application varies depending on the type of circuit breaker. Common transmission mechanisms include gear transmission mechanisms and linkage transmission mechanisms. Gear transmission mechanisms and linkage transmission mechanisms are commonly used in existing medium-voltage vacuum circuit breakers, and therefore will not be described in detail here. This configuration allows the vacuum circuit breaker to be opened and closed by pulling the operating handle 12. Since the operating handle 12, the closing / opening indicator 11, and the arc-extinguishing assembly 5 all utilize the same transmission mechanism, pulling the operating handle 12 opens and closes the conductive rod inside the arc-extinguishing assembly 5, while the closing / opening indicator 11 provides real-time indication. This makes operation simple and convenient.

[0031] The mechanism box 1 is provided with heat dissipation holes 13, the inner cavity of the heat dissipation holes 13 is interconnected with the inner cavity of the mechanism box 1, and a dustproof net 14 is fixedly installed on the heat dissipation holes 13. The mechanism box 1 is one of the core functional components of the medium-voltage vacuum circuit breaker. Its core function is to provide physical protection, environmental isolation and installation carrier for the "operating mechanism" of the circuit breaker, and to integrate related auxiliary components to ensure that the operating mechanism can stably and reliably drive the arc-extinguishing chamber to complete the opening and closing actions. It is a key component to ensure the mechanical performance and operational safety of the circuit breaker. Therefore, heat will be generated inside the mechanism box 1 during use. The heat dissipation holes 13 are provided to facilitate the dissipation of heat from the mechanism box 1. The dustproof net 14 can play a dustproof role to prevent external dust from entering the mechanism box 1 through the heat dissipation holes 13.

[0032] The working principle of this utility model is as follows: During installation, the sealing ring 3 is placed on the outside of the top protrusion of the mounting base 2, and then the arc extinguishing component 5 is placed in the installation position. At this time, the upper end of the sealing ring 3 will slide and engage in the sealing groove 501. Then, the arc extinguishing component 5 is stably fixed on the top of the mounting base 2 by the fixing bolts 4. When the arc extinguishing component 5 is stably fixed on the top of the mounting base 2, it will compress the sealing ring 3, thereby maintaining a good seal between the top of the mounting base 2 and the bottom of the arc extinguishing component 5 through the sealing ring 3. When the sealing ring 3 ages and needs to be replaced, the arc extinguishing component 5 can be disassembled and the sealing ring 3 can be directly removed and replaced.

[0033] After the mounting base 2 and the arc extinguishing component 5 are stably fixed together by the fixing bolt 4, the anti-rust part 6 is put on the hexagonal head of the fixing bolt 4. When the hexagonal head of the fixing bolt 4 is inserted into the hexagonal groove in the anti-rust sleeve 601, the inclined surface set on the inner side of the sealing inclined gasket 602 will tightly fit the inclined ring 503. The anti-rust sleeve 601 is made of plastic and the sealing inclined gasket 602 is made of rubber. Thus, the anti-rust part 6 isolates the fixing bolt 4 from the outside world, which can play a role in preventing rust on the fixing bolt 4. In addition, the inclined ring 503 is an inclined surface from bottom to top, which prevents rainwater from penetrating along the inclined surface from bottom to top, further waterproofing.

[0034] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A medium-voltage vacuum circuit breaker, comprising a mechanism box (1), characterized in that: Three sets of mounting seats (2) are fixedly installed on the top of the mechanism box (1). A sealing ring (3) is movably fitted on the outer side of the top protrusion of the mounting seat (2). The three sets of mounting seats (2) are respectively fixedly installed with arc extinguishing components (5) by four sets of fixing bolts (4). The mounting base of the arc extinguishing component (5) is provided with a sealing groove (501). The upper end of the sealing ring (3) is slidably engaged in the sealing groove (501). An arc surface (502) is provided on the mounting base of the arc extinguishing component (5). A set of anti-rust parts (6) is installed on the fixing bolts (4).

2. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: The fixing bolt (4) is threadedly connected to the inner side of the mounting base in the arc extinguishing assembly (5), and the fixing bolt (4) is threadedly connected to the threaded hole opened on the mounting base (2).

3. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: The rust-proof component (6) includes a rust-proof sleeve (601) and a sealing gasket (602). The rust-proof sleeve (601) is fitted onto the hexagonal head of the fixing bolt (4). The sealing gasket (602) has an inclined surface on its inner side and is fixedly installed at the bottom of the rust-proof sleeve (601).

4. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: Each of the three sets of arc extinguishing components (5) has a set of inclined rings (503) fixedly installed on its mounting base. The inclined surface of the inclined ring (503) is in contact with the inclined surface set on the inner side of the sealing inclined gasket (602).

5. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: A set of handles (7) are fixedly installed at both ends of the mechanism box (1), and two sets of lifting rings (8) are respectively opened through the two sets of handles (7).

6. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: Two sets of mounting base plates (9) are fixedly installed at the bottom of the mechanism box (1), and two sets of mounting connection holes (10) are opened through the mounting base plates (9).

7. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: The mechanism box (1) is equipped with a circuit breaker indicator needle (11) and an operating handle (12).

8. A medium-voltage vacuum circuit breaker according to claim 1, characterized in that: The mechanism box (1) is provided with heat dissipation holes (13), the inner cavity of the heat dissipation holes (13) is connected to the inner cavity of the mechanism box (1), and a dustproof net (14) is fixedly installed on the heat dissipation holes (13).

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