Box structure of pole circuit breaker

Abstract

The utility model discloses a box structure of a pole circuit breaker, which belongs to the technical field of circuit breakers and comprises a bottom cover. The shell is arranged on the bottom cover, and a cavity is defined by the shell and the bottom cover; the pole mounting holes are used for connecting poles; the multifunctional mounting hole assembly is used for realizing connection and wiring between the electrical elements; the sealing ring is embedded in the first sealing groove, and the sealing ring is used for sealing a gap between the bottom cover and the shell; the flat gasket is embedded in the second sealing groove, the second sealing groove is communicated with the first sealing groove, the flat gasket is arranged on the sealing ring, and the flat gasket is used for preventing the sealing ring from displacing during installation. According to the utility model, a dual sealing structure can be formed, so that the sealing performance between the shell and the bottom cover is improved, a mechanism and a secondary function module in the cavity are ensured to operate in a sealed and dry environment, and the operation failure rate of the circuit breaker is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a pole circuit breaker box structure. Background Art

[0002] In electrical systems, the pole-type circuit breaker is a crucial device used to protect circuits from faults such as overloads and short circuits. The pole-type circuit breaker's housing, acting as its outer casing, not only protects the internal electrical components but also maintains airtightness.

[0003] In the prior art, the airtightness of the pole circuit breaker box is insufficient, which easily allows external moisture, impurities or other pollutants to enter the box, reducing the insulation performance of electrical components, shortening the service life of the equipment, and increasing the risk of equipment failure. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a pole circuit breaker box structure, which can improve the airtightness inside the box and extend the service life of the equipment.

[0005] According to some embodiments of the present invention, the pole circuit breaker box structure includes a bottom cover; a shell, the shell is arranged on the bottom cover, and a cavity is formed between the shell and the bottom cover; a plurality of pole mounting holes, the plurality of pole mounting holes are arranged on the shell, and the pole mounting holes are used to connect the poles; a multifunctional mounting hole assembly, the multifunctional mounting hole assembly is arranged on the shell, and the multifunctional mounting hole assembly is used to realize the connection and wiring between electrical components; a first sealing groove and a sealing ring, the first sealing groove is opened on the shell near one end of the bottom cover, the sealing ring is embedded in the first sealing groove, and the sealing ring is used to seal the gap between the bottom cover and the shell; a second sealing groove and a flat gasket, the second sealing groove is opened on the shell near one end of the bottom cover, the flat gasket is embedded in the second sealing groove, the second sealing groove is arranged on the first sealing groove, the flat gasket is arranged on the sealing ring, and the flat gasket is used to fix the sealing ring to prevent the sealing ring from being displaced during installation.

[0006] The pole circuit breaker box structure according to the embodiment of the present utility model has at least the following beneficial effects: the sealing ring is embedded in the first sealing groove, the flat gasket is embedded in the second sealing groove, the first sealing groove and the second sealing groove are interconnected, and the flat gasket and the sealing ring are connected to each other, forming a double sealing structure, thereby improving the sealing performance between the housing and the bottom cover, ensuring that the mechanism and secondary functional module in the cavity operate in a sealed and dry environment, and reducing the failure rate of the circuit breaker operation.

[0007] According to some embodiments of the present invention, the second sealing groove is arranged at the outer edge of the first sealing groove, and the flat gasket is arranged at the outer edge of the sealing ring.

[0008] According to some embodiments of the utility model, the flat pad is uniformly provided with a plurality of mounting holes, and the bottom cover is threadedly connected with the shell through the plurality of mounting holes to fix the flat pad between the bottom cover and the shell.

[0009] According to some embodiments of the utility model, the shell comprises a top plate, a side plate and a support boss, the top plate and the support boss are respectively arranged at opposite ends of the side plate, the support boss extends away from the cavity, and a plurality of pole mounting holes are arranged on the top plate.

[0010] According to some embodiments of the utility model, a pole mounting boss is arranged on the top plate, the number of the pole mounting bosses corresponds to the number of the pole mounting holes, one pole mounting hole is arranged on each pole mounting boss, and the pole mounting boss is used for reducing the deformation amount of the top plate.

[0011] According to some embodiments of the utility model, the shell is integrally pressure die cast by aluminum alloy.

[0012] According to some embodiments of the utility model, the bottom cover is integrally pressure die cast by aluminum alloy.

[0013] According to some embodiments of the utility model, a pointer rotating shaft mounting hole, an on-site handle rotating shaft mounting hole, an isolation switch mounting hole, an isolation interlocking shaft through hole, an aviation socket mounting hole, a digital module mounting hole and a split handle rotating shaft mounting hole are arranged on the side plate, and a grounding stud is arranged on the side plate.

[0014] According to some embodiments of the utility model, the top plate is provided with a handle.

[0015] According to some embodiments of the utility model, an inflation valve mounting hole is arranged on the bottom cover, and the inflation valve mounting hole is used for mounting a helium leak detection inflation valve to detect the sealing performance of the cavity.

[0016] Additional aspects and advantages of the utility model will be given in part in the following description, will become obvious in part from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further illustrated in connection with the drawings and embodiments as follows:

[0018] Figure 1 is the structure schematic diagram of the pole circuit breaker box structure and the pole structure of the utility model embodiments;

[0019] Figure 2 is Figure 1 the structure schematic diagram of the pole circuit breaker box structure;

[0020] Figure 3 is Figure 1 the structure schematic diagram of the hidden bottom cover;

[0021] Figure 4 yes Figure 1 Bottom view of the middle shell;

[0022] Figure 5 yes Figure 1 Structural diagram of the middle sealing ring and flat gasket;

[0023] Figure 6 yes Figure 1 Schematic diagram of the structure of the midsole cover;

[0024] Figure 7 yes Figure 1 Schematic cross-section of the middle sealing ring and flat gasket between the bottom cover and the housing.

[0025] Reference numerals:

[0026] Bottom cover 100, inflation valve mounting hole 110;

[0027] Housing 200, cavity 210, top plate 220, pole mounting boss 221, handle 222, side plate 230, grounding stud 231, support boss 240;

[0028] Pole mounting hole 300;

[0029] Multifunctional mounting hole assembly 400, pointer shaft mounting hole 410, local handle shaft mounting hole 420, isolating switch mounting hole 430, isolation interlock shaft through hole 440, aviation socket mounting hole 450, digital module mounting hole 460;

[0030] First sealing assembly 500, first sealing groove 510, sealing ring 520;

[0031] Second sealing assembly 600 , second sealing groove 610 , flat gasket 620 , mounting hole 621 . DETAILED DESCRIPTION

[0032] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] refer to Figures 1 to 7 The pole circuit breaker box structure according to an embodiment of the present invention is described.

[0037] like Figure 1 and Figure 7 As shown, the pole circuit breaker box structure according to the embodiment of the present invention includes a bottom cover 100; a shell 200, the shell 200 is arranged on the bottom cover 100, and the shell 200 and the bottom cover 100 enclose a cavity 210; a plurality of pole mounting holes 300, the plurality of pole mounting holes 300 are arranged on the shell 200, and the pole mounting holes 300 are used to connect the poles; a multifunctional mounting hole assembly 400, the multifunctional mounting hole assembly 400 is arranged on the shell 200, and the multifunctional mounting hole assembly 400 is used to realize the connection and wiring between electrical components; a first sealing groove 510 and a sealing ring 520, the first sealing groove 510 and the sealing ring 520, The sealing groove 510 is opened on the shell 200 near one end of the bottom cover 100, and the sealing ring 520 is embedded in the first sealing groove 510. The sealing ring 520 is used to seal the gap between the bottom cover 100 and the shell 200; the second sealing groove 610 and the flat gasket 620, the second sealing groove 610 is opened on the shell 200 near one end of the bottom cover 100, the flat gasket 620 is embedded in the second sealing groove 610, the second sealing groove 610 is set on the first sealing groove 510, the flat gasket 620 is set on the sealing ring 520, and the flat gasket 620 is used to fix the sealing ring 520 to prevent the sealing ring 520 from being displaced during installation.

[0038] like Figure 1 and Figure 2As shown, the housing 200 is arranged on the bottom cover 100, and a cavity 210 for accommodating electrical components is formed between the housing 200 and the bottom cover 100. A plurality of pole mounting holes 300 are provided on the housing 200 along the left and right directions, and the poles are sealed and connected to the housing 200 through the pole mounting holes 300. The housing 200 is also provided with a multifunctional mounting hole assembly 400, and multiple electrical components can be connected to the housing 200 respectively through the multifunctional mounting hole assembly 400. The first sealing groove 510 and the second sealing groove 610 are both provided on the housing 200, and the open ends of the first sealing groove 510 and the second sealing groove 610 are both arranged in the direction of the bottom cover 100. A sealing ring 520 is embedded in the first sealing groove 510, and a flat gasket 620 is embedded in the second sealing groove 610, and the flat gasket 620 is arranged on the sealing ring 520. Thus, the sealing ring 520 is embedded in the first sealing groove 510, and the flat gasket 620 is embedded in the second sealing groove 610. The first sealing groove 510 and the second sealing groove 610 are interconnected, and the flat gasket 620 and the sealing ring 520 are connected to each other, forming a double sealing structure, thereby improving the sealing performance between the shell 200 and the bottom cover 100, ensuring that the mechanism and secondary functional module in the cavity 210 operate in a sealed and dry environment, and reducing the failure rate of the circuit breaker operation.

[0039] In some specific embodiments of the present invention, the second sealing groove 610 is disposed on the outer edge of the first sealing groove 510 , and the flat gasket 620 is disposed on the outer edge of the sealing ring 520 .

[0040] It should be noted that the cross-section of the sealing ring 520 is circular, while the cross-section of the flat gasket 620 is rectangular, and the plane of the flat gasket overlaps the diameter of the cross-section of the sealing ring 520. Therefore, the special-shaped sealing structure formed by the combination of the sealing ring 520 and the flat gasket 620 can better adapt to the shape of the sealing surface, filling potential gaps and irregularities, thereby reducing the possibility of leakage. Furthermore, because the flat gasket 620 is located at the outer edge of the sealing ring 520, it prevents the sealing ring 520 from shifting during installation, thereby extending the service life of the sealing element.

[0041] In this specific embodiment, the depth of the first sealing groove 510 is 3.5 mm, the width is 6 mm, and the outer diameter of the sealing ring 520 is 5 mm. When the sealing ring 520 is installed in the first sealing groove 510, a compression amount of 30% of the sealing ring 520 can be achieved, thereby ensuring a compression sealing effect.

[0042] In some specific embodiments of the present invention, a plurality of mounting holes 621 are evenly formed on the flat gasket 620 , and the bottom cover 100 is threadedly connected to the housing 200 through the plurality of mounting holes 621 to fix the flat gasket 620 between the bottom cover 100 and the housing 200 .

[0043] like Figure 5 、 Figure 6 and Figure 7 As shown, the flat gasket 620 is provided with a plurality of mounting holes 621 along the circumferential direction. It should be noted that the bottom cover 100 and the shell 200 are provided with connecting holes for threaded connection, and the connecting holes correspond one-to-one to the mounting holes 621 on the flat gasket 620. Bolts are passed through the mounting holes 621 and the connecting holes to fix the sealing ring 520 and the flat gasket 620 between the shell 200 and the bottom cover 100, so as to prevent the sealing ring 520 and the flat gasket 620 from being displaced during installation, which may cause the sealing ring 520 to fail, thereby avoiding affecting the airtightness of the cavity 210.

[0044] Specifically, there are 12 mounting holes 621 along the circumference of the flat gasket 620 to ensure that the bottom cover 100 is installed and tightened without abnormal bottom plate deformation causing the sealing ring 520 and the flat gasket 620 to fail in compression, thereby affecting the sealing effect of the box.

[0045] In some specific embodiments of the present invention, the shell 200 includes a top plate 220, a side plate 230 and a support boss 240, the top plate 220 and the support boss 240 are respectively arranged at opposite ends of the side plate 230, the support boss 240 extends in a direction away from the cavity 210, and a plurality of pole mounting holes 300 are arranged on the top plate 220.

[0046] like Figure 2 、 Figure 3 and Figure 4 As shown, the side panels 230 are formed by four wall panels, the top panel 220 is provided at the upper end of the side panels 230, and the support bosses 240 are provided at the lower end of the side panels 230. The support bosses 240 extend outward away from the side panels 230 to form a horizontal fixing platform. The top panel 220 is provided with pole mounting bosses 221. The number of pole mounting bosses 221 corresponds to the number of pole mounting holes 300, and each pole mounting boss 221 is provided with a corresponding pole mounting hole 300. In this specific embodiment, three pole mounting holes 300 are provided. Correspondingly, three pole mounting bosses 221 are provided on the top plate 220 along the left and right directions. Each pole mounting boss 221 is provided with a pole mounting hole 300. Thus, by reducing the mounting area between the pole and the top plate 220, the deformation of the top plate 220 is reduced, and the surface flatness of the top plate 220 is improved. Since the pole mounting boss 221 is higher than other parts of the surface of the top plate 220, rainwater, dust, etc. are not easy to enter the cavity 210 through the gap at the lower end of the pole, thereby improving the sealing effect of the pole connection and playing a role in waterproofing and dustproofing.

[0047] Furthermore, the side panels 230 are provided with a draft angle to facilitate demolding and also enhance the overall stability of the housing 200 .

[0048] Furthermore, the support boss 240 is provided at the lower end of the side plate 230 as a supporting structure of the entire shell 200. Waist-shaped mounting holes are provided on both ends of the support boss 240 opposite to the side plate 230 to increase the adaptability of the switch upper rod installation and fixation.

[0049] Furthermore, reinforcing ribs are provided on the top plate 220 to improve the flatness of the surface of the top plate 220 and the overall mechanical strength of the housing 200 .

[0050] Furthermore, mounting studs are provided on the side panel 230 , and users can install different functional modules according to the switch function requirements to enrich the functions and performance of the entire switch.

[0051] In some specific embodiments of the present invention, the housing 200 is formed by integral die-casting of an aluminum alloy, and the bottom cover 100 is formed by integral die-casting of an aluminum alloy.

[0052] It should be noted that the traditional circuit breaker box bottom plate adopts a sheet metal structure, which is prone to extrusion deformation during the bolt tightening process, thereby affecting the sealing performance of the box. In this specific embodiment, the housing 200 and the bottom cover 100 are manufactured by a one-piece aluminum alloy die-casting method. This manufacturing method ensures that the housing 200 and the bottom cover 100 have higher overall flatness and mechanical strength, making them less likely to deform during the installation or connection of components, thereby ensuring that the airtightness of the cavity 210 is not affected. This not only improves the durability and stability of the overall structure, but also ensures the reliability and safety of the circuit breaker during use.

[0053] In some specific embodiments of the present invention, the side panel 230 is provided with a pointer shaft mounting hole 410, a local handle shaft mounting hole 420, an isolating switch mounting hole 430, an isolating interlock shaft through hole 440, an aviation socket mounting hole 450, a digital module mounting hole 460 and a separating and closing handle shaft mounting hole, and a grounding stud 231 is provided on the side panel 230.

[0054] like Figure 2 and Figure 3As shown, the pointer shaft mounting hole 410 is located at the front end of the side panel 230. In this specific embodiment, the pointer shaft mounting hole 410 is centrally located and is used for interference fit installation of the pointer sleeve. The local handle shaft mounting hole 420 is used to install the local sleeve. Additional local handle shaft mounting holes 420 can be added as needed to add a remote local operating handle and enhance operational performance. The isolating switch mounting hole 430 is located on the rear end of the side panel 230. This is a pre-reserved structure that can be adapted to accommodate an integrated isolating switch structure, enhancing the switch's functionality and performance. The isolating interlock shaft through-hole 440 is used to install the interlocking sleeve. Additional isolating interlock shaft through-hole 440 can be added as needed to install the isolating switch interlocking shaft, achieving interlocking between the switch's internal mechanism and the external isolating switch. The aviation socket mounting hole 450 is located on the rear end of the side panel 230. Through a series of hollowed-out structural designs, this reduces the amount of aluminum used while ensuring the mechanical strength of the aviation socket mounting structure, resulting in a lighter overall weight for the housing 200. The digital module mounting hole 460 is set on one side of the aviation socket mounting hole 450, so that an external integrated digital module conversion unit can be integrated. The secondary voltage, current analog small signal and switch status signal of the sensor inside the box are connected to the external digital module through the digital module mounting hole 460, realizing the on-site digitization function of the analog quantity, and is compatible with the online quick-release function of the digital module, thereby realizing the conversion from electronic switch to digital switch.

[0055] The opening and closing handle shaft mounting hole is located on the left end face of the side plate 230, and is used for interference-fitting the tripping bushing. Furthermore, the opening and closing handle shaft mounting hole is directly aligned with the internal mechanism's synchronization shaft, creating a rigid connection between the opening and closing handle and the synchronization shaft, resulting in a simple transmission structure and high, reliable transmission efficiency. Furthermore, opening and closing indicators are located on one side of both the opening and closing handle shaft mounting hole and the pointer shaft mounting hole 410. In this embodiment, the opening and closing indicators are protruding structures provided on the side plate 230, molded directly from the housing 200.

[0056] In some specific embodiments of the present invention, the top plate 220 is provided with a handle 222 .

[0057] like Figures 1 to 3 As shown, handles 222 are provided at both ends of the top plate 220. The upper surfaces of the handles 222 are flush with the upper surface of the top plate 220. Specifically, the bottom of the handles 222 are provided with reinforcing ribs to enhance the mechanical strength of the handles 222. The corners of the handles 222 are rounded to accommodate the shape of the lifting hand and improve the comfort of manual lifting.

[0058] In some specific embodiments of the present invention, an inflation valve installation hole 110 is opened on the bottom cover 100 , and the inflation valve installation hole 110 is used to install a helium leak detection inflation valve to detect the sealing performance of the cavity 210 .

[0059] like Figure 5 As shown, the bottom cover 100 is provided with reinforcing ribs to enhance its mechanical strength and flatness, ensuring that the flatness of the bottom cover 100 meets design requirements, thereby improving the sealing reliability of the bottom cover 100. The bottom cover 100 also has a gas valve mounting hole 110 for installing a helium leak detection and inflation valve. After the entire switch is installed, helium is injected through the gas valve mounting hole 110 for helium leak detection and testing the sealing performance of the entire switch, thereby improving the sealing reliability of the entire switch.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A pole circuit breaker box structure, characterized in that: include: Bottom cover (100); a housing (200), the housing (200) being arranged on the bottom cover (100), the housing (200) and the bottom cover (100) enclosing to form a cavity (210); A plurality of pole mounting holes (300), wherein the plurality of pole mounting holes (300) are provided on the housing (200), and the pole mounting holes (300) are used for connecting poles; a multifunctional mounting hole assembly (400), the multifunctional mounting hole assembly (400) being arranged on the housing (200), the multifunctional mounting hole assembly (400) being used to realize connection and wiring between electrical components; a first sealing groove (510) and a sealing ring (520), wherein the first sealing groove (510) is provided on the housing (200) near one end of the bottom cover (100), and the sealing ring (520) is embedded in the first sealing groove (510), and the sealing ring (520) is used to seal the gap between the bottom cover (100) and the housing (200); A second sealing groove (610) and a flat gasket (620), wherein the second sealing groove (610) is provided on the housing (200) near one end of the bottom cover (100), and the flat gasket (620) is embedded in the second sealing groove (610), the second sealing groove (610) is provided on the first sealing groove (510), and the flat gasket (620) is provided on the sealing ring (520), and the flat gasket (620) is used to fix the sealing ring (520) to prevent the sealing ring (520) from being displaced during installation.

2. The pole circuit breaker box structure according to claim 1, characterized in that: The second sealing groove (610) is arranged at the outer edge of the first sealing groove (510), and the flat gasket (620) is arranged at the outer edge of the sealing ring (520).

3. The pole circuit breaker box structure according to claim 2, characterized in that: A plurality of mounting holes (621) are evenly formed on the flat gasket (620), and the bottom cover (100) is threadedly connected to the housing (200) through the plurality of mounting holes (621) to fix the flat gasket (620) between the bottom cover (100) and the housing (200).

4. The pole circuit breaker box structure according to claim 3, characterized in that: The housing (200) comprises a top plate (220), a side plate (230) and a supporting boss (240), wherein the top plate (220) and the supporting boss (240) are respectively arranged at opposite ends of the side plate (230), the supporting boss (240) extends in a direction away from the cavity (210), and a plurality of the pole mounting holes (300) are arranged on the top plate (220).

5. The pole circuit breaker box structure according to claim 4, characterized in that: The top plate (220) is provided with a pole mounting boss (221), the number of the pole mounting bosses (221) corresponds to the number of the pole mounting holes (300), and each pole mounting boss (221) is provided with a corresponding pole mounting hole (300). The pole mounting boss (221) is used to reduce the deformation of the top plate (220).

6. The pole circuit breaker box structure according to claim 1, characterized in that: The housing (200) is formed by integral die-casting of aluminum alloy.

7. The pole circuit breaker box structure according to claim 1, characterized in that: The bottom cover (100) is formed by integral die-casting of aluminum alloy.

8. The pole circuit breaker box structure according to claim 5, characterized in that: The side plate (230) is provided with a pointer shaft mounting hole (410), a local handle shaft mounting hole (420), an isolating switch mounting hole (430), an isolating interlock shaft through hole (440), an aviation socket mounting hole (450), a digital module mounting hole (460) and an opening / closing handle shaft mounting hole. A grounding stud (231) is provided on the side plate (230).

9. The pole circuit breaker box structure according to claim 4, characterized in that: The top plate (220) is provided with a handle (222).

10. The pole circuit breaker box structure according to claim 1, characterized in that: An inflation valve installation hole (110) is provided on the bottom cover (100), and the inflation valve installation hole (110) is used to install a helium leak detection inflation valve to detect the sealing performance of the cavity (210).

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