Box structure of pole circuit breaker

Abstract

The invention 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 invention, 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 invention relates to the technical field of circuit breakers, and in particular to a box structure of a pole circuit breaker. Background Art

[0002] In electrical systems, pole circuit breakers are vital devices used to protect circuits from faults such as overload or short circuit. The box of the pole circuit breaker, as its outer shell, not only protects the internal electrical components, but also has the important task of maintaining airtightness.

[0003] In the prior art, the air tightness of the pole circuit breaker box is insufficient, which easily allows external moisture, impurities or other pollutants to enter the box, reduce the insulation performance of electrical components, shorten the service life of the equipment, and increase the risk of equipment failure. Summary of the invention

[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 air tightness 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 invention 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 shell and the bottom cover, ensuring that the mechanism and the secondary functional module in the cavity operate in a sealed and dry environment, and reducing the circuit breaker operation failure rate.

[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 present invention, a plurality of mounting holes are evenly formed on the flat gasket, and the bottom cover is threadedly connected to the shell through the plurality of mounting holes to fix the flat gasket between the bottom cover and the shell.

[0009] According to some embodiments of the present invention, the shell includes 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 in a direction away from the cavity, and a plurality of pole mounting holes are arranged on the top plate.

[0010] According to some embodiments of the present invention, pole mounting bosses are provided on the top plate, the number of the pole mounting bosses corresponds to the number of the pole mounting holes, a pole mounting hole is correspondingly provided on each pole mounting boss, and the pole mounting bosses are used to reduce the deformation of the top plate.

[0011] According to some embodiments of the present invention, the housing is formed by integral die-casting of aluminum alloy.

[0012] According to some embodiments of the present invention, the bottom cover is formed by integral die-casting of aluminum alloy.

[0013] According to some embodiments of the present invention, the side panel is provided with a pointer shaft mounting hole, a local handle shaft mounting hole, an isolating switch mounting hole, an isolating interlock shaft through hole, an aviation socket mounting hole, a digital module mounting hole and a separation and combination handle shaft mounting hole, and a grounding stud is provided on the side panel.

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

[0015] According to some embodiments of the present invention, a gas filling valve installation hole is provided on the bottom cover, and the gas filling valve installation hole is used to install a helium leak detection gas filling valve to detect the sealing performance of the cavity.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the structure of a pole circuit breaker box and a pole according to an embodiment of the present invention;

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

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure of the hidden bottom cover;

[0021] Figure 4yes Figure 1 A 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 A schematic diagram of the structure of the midsole cover;

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

[0025] Reference numerals:

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

[0027] Shell 200, cavity 210, top plate 220, pole mounting boss 221, handle 222, side plate 230, grounding stud 231, supporting 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, isolating interlock shaft through hole 440, aviation socket mounting hole 450, digital module mounting hole 460;

[0030] A first sealing assembly 500, a first sealing groove 510, and a 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 the 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., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. 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 A 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 are enclosed to form 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 The 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, and 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, and 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, and 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 enclosed between the housing 200 and the bottom cover 100. A plurality of pole mounting holes 300 are arranged 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. A multifunctional mounting hole assembly 400 is also arranged on the housing 200, and a plurality of electrical components can be respectively connected to the housing 200 through the multifunctional mounting hole assembly 400. The first sealing groove 510 and the second sealing groove 610 are both arranged on the housing 200, and the opening 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. Therefore, the sealing ring 520 is embedded in the first sealing groove 510, 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 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, the cross section of the flat gasket 620 is rectangular, and the plane where the flat gasket is located overlaps with the diameter of the cross section of the sealing ring 520. Therefore, the special-shaped sealing structure formed by the sealing ring 520 and the flat gasket 620 can better adapt to the shape of the sealing surface, fill potential gaps and irregular surfaces, and thus reduce the possibility of leakage. At the same time, since the flat gasket 620 is located at the outer edge of the sealing ring 520, it can prevent the sealing ring 520 from being displaced during installation, thereby extending the service life of the sealing element.

[0041] In this specific embodiment, the first sealing groove 510 has a depth of 3.5 mm and a width of 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 , so as 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 with 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 and causing failure of the sealing ring 520, thereby avoiding affecting the air tightness of the cavity 210.

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

[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 plate 230 is formed by enclosing four wall plates, the top plate 220 is arranged at the upper end of the side plate 230, and the support boss 240 is arranged at the lower end of the side plate 230, and the support boss 240 extends outward in a direction away from the side plate 230 to form a horizontal fixing platform. Among them, the top plate 220 is provided with a pole mounting boss 221, and the number of the pole mounting boss 221 corresponds to the number of the pole mounting holes 300, and each pole mounting boss 221 is correspondingly provided with a pole mounting hole 300. In this specific embodiment, three pole mounting holes 300 are provided, and correspondingly, three pole mounting bosses 221 are provided on the top plate 220 along the left and right directions, and each pole mounting boss 221 is provided with a pole mounting hole 300, thereby reducing the deformation of the top plate 220 by reducing the mounting area between the pole and the top plate 220, and improving the surface flatness of the top plate 220. 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 plate 230 is 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 arranged at the lower end of the side plate 230 as a supporting structure of the entire shell 200, and waist-shaped mounting holes are arranged on the supporting boss 240 at both opposite ends of 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 the user 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 conventional bottom plate of the circuit breaker box 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 integral die-casting of aluminum alloy. This manufacturing method makes the housing 200 and the bottom cover 100 have higher overall flatness and mechanical strength, making it less likely to deform when installing or connecting components, thereby ensuring that the airtightness of the cavity 210 is not affected, which 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 separation and combination 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 set at the front end of the side plate 230. In this specific embodiment, the pointer shaft mounting hole 410 is set in the center, and the pointer shaft mounting hole 410 is used to install the pointer sleeve by interference. The local handle shaft mounting hole 420 is used to install the local sleeve. According to actual needs, the local handle shaft mounting hole 420 can be added to increase the remote local operation handle to enrich the operation performance. The isolating switch mounting hole 430 is set on the rear end face of the side plate 230. It belongs to a reserved structure and can be adapted to install an integrated isolating switch structure to improve the function and performance of the switch. The isolation interlocking shaft through hole 440 is used to install the interlocking shaft sleeve. Users can add the isolation interlocking shaft through hole 440 according to needs to install the isolation switch interlocking shaft to realize the interlocking function of the internal mechanism of the switch and the appearance of the isolating switch. The aviation socket mounting hole 450 is set on the rear end face of the side plate 230. Through a series of hollow structure designs, while meeting the mechanical strength of the aviation plug installation structure, it also reduces the use of aluminum materials, making the overall weight of the housing 200 lighter. The digital module mounting hole 460 is arranged on one side of the aviation socket mounting hole 450, so that an external integrated digital module conversion unit can be integrated, and 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, thereby realizing the on-site digitization function of the analog quantity, and being compatible with the online quick release function of the digital module, thereby realizing the conversion of the electronic switch to the digital switch.

[0055] The split handle shaft mounting hole is provided on the left end face of the side plate 230, which is used for interference mounting of the split gate shaft sleeve. Furthermore, the split handle shaft mounting hole is directly on the same horizontal line as the internal mechanism synchronization shaft, and the split handle and the synchronization shaft are rigidly connected, with a simple transmission structure, high transmission efficiency and reliability. Furthermore, a split handle shaft mounting hole and a pointer shaft mounting hole 410 are both provided with a split indication on one side. In this specific embodiment, the split indication is a protruding structure provided on the side plate 230, which is directly formed by the housing 200 mold.

[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, and the upper surface of the handle 222 is flush with the upper surface of the top plate 220. Specifically, reinforcing ribs are provided at the bottom of the handle 222 to improve the mechanical strength of the handle 222, and the corners of the handle 222 are rounded to fit the lifting hand shape and improve the comfort of manual lifting.

[0058] In some specific embodiments of the present invention, a gas filling valve installation hole 110 is provided on the bottom cover 100 , and the gas filling valve installation hole 110 is used to install a helium leak detection gas filling 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, which are used to enhance the mechanical strength and flatness of the bottom cover 100, and ensure that the flatness of the bottom cover 100 meets the design requirements, thereby improving the sealing reliability of the bottom cover 100. The bottom cover 100 is also provided with an inflation valve installation hole 110 for installing a helium leak detection inflation valve. After the whole machine is installed, helium is injected through the inflation valve installation hole 110 for helium leak detection, and the sealing performance of the whole switch is tested to improve the sealing reliability of the whole switch.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope 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 arranged on the housing (200), and the pole mounting holes (300) are used to connect 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) at one end close to 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 opened on the shell (200) at one end close to the bottom cover (100), and the flat gasket (620) is embedded in the second sealing groove (610). The second sealing groove (610) is arranged on the first sealing groove (510), and the flat gasket (620) is arranged on the sealing ring (520). 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: The flat gasket (620) is evenly provided with a plurality of mounting holes (621), and the bottom cover (100) is threadedly connected to the housing (200) via the plurality of mounting holes (621), so as 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 shell (200) comprises a top plate (220), a side plate (230) and a supporting boss (240); 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), each pole mounting boss (221) is correspondingly provided with one pole mounting hole (300), and 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 integrally die-casted using aluminum alloy.

7. The pole circuit breaker box structure according to claim 1, characterized in that: The bottom cover (100) is integrally die-casted using 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 and closing handle shaft mounting hole, and 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: The bottom cover (100) is provided with an inflation valve installation hole (110), 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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