A high-reliability sealed pole-mounted circuit breaker mechanism tank

Abstract

The utility model belongs to the technical field of pole circuit breaker sealing, disclose a kind of high reliability sealed pole circuit breaker mechanism box.The mechanism box includes shell, circuit breaker pillar, bottom plate, fastening fixing bolt, sealing ring, square steel;Shell is installed on the upper end of circuit breaker pillar;Square steel is installed in the box body of shell;Sealing ring, bottom plate are sequentially installed on square steel by fastening fixing bolt on square steel upper surface, and positioning hole is provided on square steel;On the body of sealing ring, corresponding position with the positioning hole on square steel, design has conical protrusion, and conical protrusion is interference fit with positioning hole, for sealing ring positioning and preventing displacement.The utility model enhances the protection level of mechanism box: effectively prevent moisture, salt fog, sand and other harmful medium intrusion mechanism box inside, protect internal operating mechanism and component, prolong the service life of equipment, improve the reliability of circuit breaker action.Reduce the risk of sealing failure due to improper human operation.

Description

Technical Field

[0001] This utility model belongs to the field of pole-mounted circuit breaker sealing technology, and particularly relates to a highly reliable sealed pole-mounted circuit breaker mechanism box. Background Technology

[0002] Pole-mounted circuit breakers, as key protection and control devices in power distribution networks, are typically installed on outdoor utility poles for extended periods, directly exposed to harsh environments such as wind, rain, dust, salt spray, high temperatures, and high humidity. Their internal mechanism housing contains sophisticated operating mechanisms, transmission components, and control units; the reliable operation of these components directly affects the safety and stability of the power grid.

[0003] In existing technology, the mechanism box of a pole-mounted circuit breaker typically consists of a box body, a base plate, and a sealing ring placed between the two. The base plate is fixedly connected to a square steel (or mounting beam) welded to the bottom of the box body by bolts, thereby pressing the sealing ring to achieve a seal.

[0004] Based on the above analysis, the problems and shortcomings of the existing technology are as follows: (1) The sealing ring is prone to displacement, which leads to sealing failure: During the assembly process, if the operator fails to tighten the bolts evenly in a diagonal sequence, or if the base plate is subjected to uneven impact and vibration during transportation and installation, it will cause local stress and slight deformation or tilting. At this time, the traditional flat sealing ring lacks effective radial positioning measures and is prone to slippage or lifting due to friction alone, which causes the sealing ring to be locally displaced from the preset compression position and form a gap.

[0005] (2) Insufficient moisture-proof, corrosion-proof, and dust-proof capabilities: Once the sealing ring is displaced and gaps are formed, external moisture, salt spray from coastal areas, and windblown dust will enter the interior of the mechanism box through these gaps. The internal operating mechanism, metal parts, and electronic components will rust, oxidize, and accumulate dust in this harsh environment for a long time, leading to a series of faults such as jamming of mechanical operations (such as closing and opening), increased resistance, incomplete operation, poor contact of electrical contacts, and decreased insulation performance, which seriously affect the service life and operational reliability of the circuit breaker.

[0006] (3) Lack of secondary sealing and fault tolerance mechanism: The traditional sealing structure is a single plane compression seal, which is simple in structure but has poor fault tolerance. Once the main sealing surface fails for any reason, there is no other barrier to prevent the intrusion of external media, and the safety margin is low.

[0007] Therefore, there is an urgent need in this field for a new structure that can effectively prevent the displacement of the sealing ring, improve the overall sealing reliability of the mechanism box, and enhance its environmental adaptability. Utility Model Content

[0008] To overcome the problems existing in related technologies, the present invention discloses a highly reliable sealed pole-mounted circuit breaker mechanism box.

[0009] The technical solution is as follows: A highly reliable sealed pole-mounted circuit breaker mechanism box includes a shell, a circuit breaker support, a base plate, fastening bolts, a sealing ring, and a square steel. The shell is installed on the upper end of the circuit breaker support. A square steel is installed inside the shell. A sealing ring and a base plate are sequentially installed on the square steel by fastening bolts. A positioning hole is provided on the square steel. On the body of the sealing ring, a conical protrusion is designed at a position corresponding to the positioning hole on the square steel. The conical protrusion is interference-fitted with the positioning hole for positioning the sealing ring and preventing displacement.

[0010] A transverse enclosure plate is welded to the outer side of the square steel, and a longitudinal enclosure plate is welded to the outer side of the square steel. The transverse enclosure plate, the longitudinal enclosure plate, and the inner wall of the shell together form a groove.

[0011] The sealing ring is placed in the groove.

[0012] The base plate has a first threaded hole, the sealing ring has a second threaded hole, and the square steel has a third threaded hole. The first threaded hole on the base plate, the second threaded hole on the sealing ring, and the third threaded hole on the square steel are all fixed by fastening bolts.

[0013] The locating hole is located between two adjacent third threaded holes.

[0014] The tapered protrusion and the second threaded hole of the sealing ring are located on different upper and lower surfaces, and the tapered protrusion is located between two adjacent second threaded holes.

[0015] There are multiple positioning holes, distributed on the transverse and longitudinal steel plates of the square steel, and multiple conical protrusions, distributed around the lower part of the transverse and longitudinal end faces of the sealing ring.

[0016] Combining all the above technical solutions, the beneficial effects of this utility model are as follows: This invention solves the problem of radial displacement of the sealing ring: it provides an active, mechanical positioning structure to ensure that the sealing ring will not slip laterally or twist during the base plate tightening process or under uneven external forces. It improves the overall reliability and stability of the seal: through multiple structural designs, it enhances the anti-interference capability and long-term stability of the sealing system, ensuring sustained and effective sealing performance in harsh outdoor environments. It enhances the protection level of the mechanism housing: effectively preventing harmful media such as moisture, salt spray, and sand from entering the interior of the mechanism housing, protecting the internal operating mechanisms and components, extending equipment life, and improving the reliability of circuit breaker operation. It optimizes assembly processability: it provides a structure that facilitates assembly and alignment, reducing the risk of seal failure due to improper human operation. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure; Figure 1 This is a schematic diagram of a highly reliable sealed pole-mounted circuit breaker mechanism box provided in this embodiment of the utility model; Figure 2 This is an exploded view of the sealing ring and the base plate provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the assembly of the housing and the sealing ring provided in an embodiment of this utility model; Figure 4 This is provided by the embodiment of the present utility model. Figure 3 Enlarged view of section A in the middle; Figure 5 This is a schematic diagram of the assembly of the sealing ring and the square steel provided in this embodiment of the utility model; Figure 6 This is a three-dimensional schematic diagram of the sealing ring provided in an embodiment of this utility model; In the diagram: 1. Housing; 2. Circuit breaker support; 3. Base plate; 301. First threaded hole; 4. Fastening bolt; 5. Sealing ring; 501. Conical protrusion; 502. Second threaded hole; 6. Square steel; 601. Third threaded hole; 602. Positioning hole; 7. Transverse enclosure; 8. Longitudinal enclosure; 9. Groove. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0019] Example 1, as Figures 1-6 As shown, the highly reliable sealed pole-mounted circuit breaker mechanism box has a double anti-displacement sealing system at the bottom of the mechanism box, including: housing 1, circuit breaker support 2, base plate 3, fastening bolts 4, sealing ring 5, and square steel 6; the housing 1 is installed on the upper end of the circuit breaker support 2. like Figure 3 As shown, a square steel bar 6 is installed inside the housing 1; a transverse surrounding plate 7 is welded to the transverse outer side of the square steel bar 6, and a longitudinal surrounding plate 8 is welded to the longitudinal outer side of the square steel bar 6. The transverse surrounding plate 7 and the longitudinal surrounding plate 8 together form a groove 9 with the inner wall of the housing 1. Figure 3 , Figure 5 As shown; like Figure 4As shown, the sealing ring 5 is placed in the groove 9; the upper part of the sealing ring 5 is fastened to the base plate 3 by the fastening bolt 4; a positioning hole 602 is provided on the square steel 6; on the body of the sealing ring 5, at the position corresponding to the positioning hole 602 on the square steel 6, a conical protrusion 501 is designed, such as... Figure 6 The tapered protrusion 501 is interference-fitted with the positioning hole 602 and is used for positioning the sealing ring 5.

[0020] For example, the base plate 3 has a first threaded hole 301, the sealing ring 5 has a second threaded hole 502, and the square steel 6 has a third threaded hole 601. The first threaded hole 301 of the base plate 3, the second threaded hole 502 of the sealing ring 5, and the third threaded hole 601 of the square steel 6 are all fixed by fastening bolts 4.

[0021] The positioning hole 602 is located between two adjacent third threaded holes 601; the tapered protrusion 501 and the second threaded hole 502 of the sealing ring 5 are located on different upper and lower surfaces, and the tapered protrusion 501 is located between two adjacent second threaded holes 502; Figure 5 As shown.

[0022] There are multiple positioning holes 602, distributed on the transverse and longitudinal steel plates of the square steel, and multiple conical protrusions 501, which are distributed around the lower part of the transverse and longitudinal end faces of the sealing ring 5.

[0023] Working principle.

[0024] (1) Active anti-displacement mechanism of tapered protrusion and positioning hole; Structure: On the existing square steel 6 used to fix the base plate 3, in addition to the existing third threaded hole 601, a positioning hole 602 is added between every two adjacent threaded holes. Correspondingly, on the body of the sealing ring 5, at the position corresponding to the positioning hole 602 on the square steel 6, an upwardly protruding conical protrusion 501 is designed, such as... Figure 6 As shown, Among them, the first threaded hole 301 of the base plate 3, the second threaded hole 502 of the sealing ring 5, and the third threaded hole 601 of the square steel 6 are all fixed by fastening bolts 4. The conical protrusion 501 of the sealing ring 5 cooperates with the positioning hole 602 on the square steel 6 for positioning the sealing ring 5 and preventing displacement. During assembly, the tapered protrusion 501 on the sealing ring 5 fits precisely into the third threaded hole of the positioning hole 602 on the square steel 6. This tapered-hole fit structure forms a highly efficient radial positioning system. Regardless of the force applied to the base plate 3 during tightening, the horizontal position of the sealing ring 5 is firmly restricted by the tapered protrusion 501 and the positioning hole 602, fundamentally eliminating the possibility of lateral displacement.

[0025] (2) The passive constraint mechanism of the groove formed by the enclosure and the box body; Structure: A transverse surrounding plate 7 is welded to the transverse outer side of the square steel 6, and a longitudinal surrounding plate 8 is welded to the longitudinal outer side of the square steel 6. The transverse surrounding plate 7, the longitudinal surrounding plate 8, and the inner wall of the shell 1 together form a groove 9. Figure 3 , Figure 5 As shown; Function: The sealing ring 5 is placed within this groove 9. This groove 9 forms a natural "wall," enclosing and constraining the entire outer periphery of the sealing ring 5. Even in extreme cases, the groove can act as a second line of defense, limiting significant overall movement or detachment of the sealing ring 5.

[0026] This invention upgrades the traditional "single-plane compression" sealing mode to a dual anti-displacement sealing mode of "active positioning (cone-hole fit) + passive constraint (groove 9 limit)," which greatly improves the robustness of the sealing system.

[0027] It can be seen that the positioning hole 602 on the square steel 6 and the tapered protrusion 501 on the sealing ring 5 for embedding in the positioning hole 602 are in an interference fit relationship. This is the most core and essential innovation of this solution.

[0028] The groove 9 constraint structure is a structural feature of the transverse surrounding plate 7 and the longitudinal surrounding plate 8 welded to the outside of the square steel 6, and the groove 9 formed by the transverse surrounding plate 7, the longitudinal surrounding plate 8 and the box body of the shell 1 to accommodate the sealing ring 5.

[0029] System Combination: The complete dual anti-displacement sealing system is formed by combining the above-mentioned "conical protrusion-positioning hole" structure with the "enclosure plate-groove" structure.

[0030] This utility model proposes a specific layout in which the positioning hole 602 is located between every two third threaded holes 601 on the square steel 6 and the tapered protrusion 501 is located between every two second threaded holes 502 on the sealing ring 5.

[0031] This utility model incorporates the core concept of "positioning holes + protrusions". By gradually adding grooves in the surrounding plate, conical protrusions, and positioning holes 602 located between every two third threaded holes 601 on the square steel 6, a layered, progressive, three-dimensional, and stable system with a wide protection range is formed.

[0032] As can be seen from the above embodiments, the sealing reliability of this utility model is significantly improved: through the dual protection of mechanical interlocking (cone-hole) and physical constraint (groove), the problem of sealing ring displacement caused by assembly and transportation is completely solved, and the sealing reliability has achieved a leap from "relying on operator experience" to "being guaranteed by the structure itself". Significantly enhanced environmental adaptability: The excellent sealing performance allows the mechanism box to better resist the invasion of rainwater, condensation, salt spray, sand and dust, etc., and is especially suitable for harsh geographical and climatic environments such as coastal areas, sandstorms, and humidity. Extended equipment service life: The internal mechanism and working components are effectively protected, avoiding failures caused by corrosion and pollution, significantly reducing maintenance frequency and costs, and extending the service life of the entire circuit breaker. Improved power grid operation reliability: It ensures the accuracy and smoothness of the pole-mounted circuit breaker operating mechanism, reduces failure to operate or malfunctions caused by mechanism box failures, and improves the operational safety and stability of the distribution network. Convenient assembly and good manufacturability: The conical protrusion and groove have a self-guiding effect, facilitating quick alignment during assembly, reducing assembly difficulty and the technical requirements for operators, and improving production efficiency.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the scope of the technology disclosed in the present utility model, within the spirit and principles of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A highly reliable sealed pole-mounted circuit breaker mechanism box, comprising a housing (1), a circuit breaker support (2), a base plate (3), fastening bolts (4), a sealing ring (5), and a square steel (6); the housing (1) is installed on the upper end of the circuit breaker support (2); the square steel (6) is installed inside the housing (1); the sealing ring (5) and the base plate (3) are sequentially installed on the square steel (6) by fastening bolts (4), characterized in that, The square steel (6) is provided with a positioning hole (602); on the body of the sealing ring (5), a conical protrusion (501) is designed at the position corresponding to the positioning hole (602) on the square steel (6). The conical protrusion (501) is press-fitted with the positioning hole (602) for positioning the sealing ring (5) and preventing displacement. The base plate (3) has a first threaded hole (301), the sealing ring (5) has a second threaded hole (502), and the square steel (6) has a third threaded hole (601). The first threaded hole (301) of the base plate (3), the second threaded hole (502) of the sealing ring (5), and the third threaded hole (601) of the square steel (6) are all fixed by fastening bolts (4).

2. The high-reliability sealed pole-mounted circuit breaker mechanism box according to claim 1, characterized in that, A transverse enclosure plate (7) is welded to the transverse outer side of the square steel (6), and a longitudinal enclosure plate (8) is welded to the longitudinal outer side of the square steel (6). The transverse enclosure plate (7), the longitudinal enclosure plate (8), and the inner wall of the shell (1) together form a groove (9).

3. The high-reliability sealed pole-mounted circuit breaker mechanism box according to claim 2, characterized in that, The sealing ring (5) is placed in the groove (9).

4. The high-reliability sealed pole-mounted circuit breaker mechanism box according to claim 1, characterized in that, The positioning hole (602) is located between two adjacent third threaded holes (601).

5. The high-reliability sealed pole-mounted circuit breaker mechanism box according to claim 1, characterized in that, The tapered protrusion (501) and the second threaded hole (502) of the sealing ring (5) are located on different upper and lower surfaces, and the tapered protrusion (501) is located between two adjacent second threaded holes (502).

6. The high-reliability sealed pole-mounted circuit breaker mechanism box according to claim 1, characterized in that, There are multiple positioning holes (602) distributed on the transverse and longitudinal steel plates of the square steel, and multiple conical protrusions (501) distributed around the lower part of the transverse and longitudinal end faces of the sealing ring (5).

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