Anti-vibration type primary and secondary fusion pole-mounted circuit breaker

Abstract

The invention relates to the technical field of electrical engineering, in particular to an anti-vibration type primary and secondary fusion pole-mounted circuit breaker. A vibration reduction assembly composed of a guide column, a middle bearing plate, a vibration reduction piece and a distance limiting piece with a first working state and a second working state is arranged between a bottom plate of a box body and a mounting base, so that the supporting rigidity of the mechanism box body relative to a tower cross arm can be switched between a mounting working condition and an operation working condition; a large distance is kept between the middle bearing plate and the mounting base, and the damping piece is in a small compression amount and can elastically absorb impact and vibration in the hoisting, carrying and in-place processes; under the operation working condition, the distance limiting piece limits the middle bearing plate at the preset position relative to the box body bottom plate, so that the vibration reduction piece is further compressed, the overall supporting rigidity is improved while certain vibration reduction capacity is kept, and shaking and displacement of the mechanism box body are reduced. Working condition switching can be achieved through a small number of mechanical parts, the structure is compact, and machining and on-site adjustment are convenient.

Description

Technical Field

[0001] This invention relates to the field of electrical engineering technology, specifically to a vibration-resistant primary and secondary integrated pole-mounted circuit breaker. Background Technology

[0002] With the improvement of the automation level of distribution networks, primary and secondary integrated pole-mounted circuit breakers are widely used in 10kV distribution lines. These devices typically integrate primary components such as solid-sealed poles and vacuum interrupters, as well as secondary components such as electronic instrument transformers, measurement and control and communication units, into the same mechanism box. The whole device is fixed to the crossarm of the pole by a mounting base. The device has a large self-weight, and its center of gravity is often off-center from the pole centerline.

[0003] Existing integrated primary and secondary pole-mounted circuit breakers mostly employ rigid connections in their installation structures, directly fastening the housing to the pole crossarm via mounting lugs, angle steel brackets, or an integral mounting base. Some designs incorporate rubber pads, elastic bushings, or spring dampers between the housing and the mounting base to buffer vibrations from the pole during operation. However, on the one hand, during factory transport, on-site hoisting, and placement, the device inevitably experiences swaying, swinging, and even collisions with the crossarm or temporary support components; if the overall rigidity of the installation structure is too high, impact loads can easily be directly transmitted to the housing and its internal primary and secondary components. On the other hand, under long-term operating conditions, the device must withstand periodic or impact vibrations caused by wind vibration, line galloping, icing, and ice shedding. To ensure the spatial geometry of the pole to phase line, the creepage distance of the external insulation, and the stress distribution of the conductor leads, the installation structure is usually required to have sufficient overall rigidity and bending resistance, so that the displacement and tilt of the mechanism box relative to the crossarm are controlled within a small range. Otherwise, under long-term vibration, mechanical problems such as amplified overall sway, wear of connecting bolts and bolt holes, and fatigue cracking of welds and supports are likely to occur. At the same time, the electronic current transformer, small signal connectors and internal circuits will be in a low-frequency, large displacement oscillation condition for a long time, causing repeated bending of the solder joints, plug-in connectors and flexible conductors, thereby inducing potential hazards such as poor contact, signal fluctuations, and even malfunctions or failures to operate.

[0004] Furthermore, in existing products, the lifting components used for hoisting and transporting the entire unit are typically located on the top or side wall of the mechanism housing, and are mostly used only during transportation and installation. They are arranged independently from the mounting base and vibration damping structure at the bottom of the housing, and the overall stress path and structural utilization need optimization. In general, the existing installation structure of primary and secondary integrated pole-mounted circuit breakers cannot simultaneously meet the different requirements for vibration damping performance and support stability under both installation and long-term operating conditions, and there is still room for further improvement. Summary of the Invention

[0005] (i) The technical problem to be solved by the present invention is that when the mechanism box is connected to the pole crossarm by a fixed stiffness installation structure in the primary and secondary integrated pole circuit breaker, it is difficult to effectively buffer the impact load under installation conditions such as factory transfer and on-site hoisting, while providing sufficient support stiffness and stability to the vibration from the pole under long-term operation conditions. Thus, it is impossible to take into account both the vibration reduction protection of the box and its internal primary and secondary components and the overall mechanical stability control.

[0006] (II) Technical Solution To address the aforementioned technical problems, this invention provides a vibration-damping primary and secondary integrated pole-mounted circuit breaker, comprising a mechanism housing, a pole assembly disposed on the mechanism housing, and a mounting base for mounting the mechanism housing onto a pole crossarm. A vibration damping component is provided between the mounting base and the bottom plate of the mechanism housing, the vibration damping component comprising: Several guide columns are fixed to the bottom plate of the box and extend downward; An intermediate support plate is slidably sleeved on each of the guide columns, so that the intermediate support plate can move relative to the bottom plate of the box along the axial direction of the guide columns; A vibration damping component is disposed between the intermediate bearing plate and the mounting base to provide elastic support between the intermediate bearing plate and the mounting base; A spacing limiting element is detachably or movably disposed between the intermediate support plate and the bottom plate of the box body; The spacing limiting member has a first working state and a second working state; In the first working state, there is a first gap between the intermediate bearing plate and the mounting base, and the vibration damping member is under a first compression. In the second working state, the spacing limiting member restricts the intermediate bearing plate to a preset position relative to the bottom plate of the box, so that there is a second spacing between the intermediate bearing plate and the mounting base that is less than the first spacing, and the vibration damping member is compressed to a second compression amount that is greater than the first compression amount.

[0007] By installing a vibration damping assembly consisting of guide columns, an intermediate bearing plate, vibration dampers, and spacing limiting components with first and second working states between the bottom plate of the mechanism housing and the mounting base, the connection stiffness between the mechanism housing and the tower crossarm can be switched between installation and operation conditions. When the spacing limiting component is in the first working state, the intermediate bearing plate maintains a first distance from the mounting base, and the vibration damper is at a first compression level, providing relatively flexible elastic support against swaying and collisions during hoisting and positioning, which helps to buffer impact loads and reduce mechanical impact on the mechanism housing and internal primary and secondary components. When the spacing limiting component is in the second working state, the intermediate bearing plate is restricted to a preset position relative to the bottom plate of the housing, and the distance between the intermediate bearing plate and the mounting base is a second distance smaller than the first distance. The vibration damper is compressed to a second compression level, thereby providing higher support stiffness and a stable pre-tightening state under long-term operation conditions, which helps to control the displacement and sway of the mechanism housing relative to the crossarm and reduce the risk of fatigue failure of fasteners, supports, and internal small signal components under vibrations such as wind vibration and icing.

[0008] Since the spacing limiting component is set between the intermediate bearing plate and the bottom plate of the box, and the spacing between the intermediate bearing plate and the mounting base and the compression of the vibration damper are indirectly adjusted by changing the relative position between the two, the present invention does not require the addition of a complex adjustment mechanism on the mounting base or the vibration damper body. It can complete the stiffness switching between the installation condition and the operation condition without disassembling the mechanism box and the vibration damping component. The structure is compact, which is convenient for on-site construction and maintenance. It is beneficial to balance vibration damping performance and installation convenience within the limited space of the tower crossarm.

[0009] According to one embodiment of the invention, the spacing limiter is an insert plate that is radially movable along the guide post and is configured to move between an insertion position and a withdrawal position: In the first working state, the insert plate is in the pulled-out position, so that the upper surface of the intermediate support plate abuts against the lower surface of the box bottom plate; In the second working state, the insert plate is inserted between the intermediate support plate and the bottom plate of the housing. The thickness of the insert plate is used to limit the distance between the intermediate support plate and the bottom plate of the housing, so that the intermediate support plate and the mounting base have the second distance, and together with the intermediate support plate, they bear the axial load transmitted from the bottom plate of the housing to the vibration damping component.

[0010] With the above configuration, the spacing limiter is implemented as a plate that can be inserted and removed radially along the guide post. This eliminates the need for complex adjustments to the damper body or mounting base. Simply switching the plate between the insertion and withdrawal positions allows for quick and reliable positioning of the intermediate bearing plate in both working conditions. In the first working state, the intermediate bearing plate directly contacts the bottom plate of the housing, resulting in a simple load path and smooth support, which is beneficial for absorbing impacts during hoisting and handling using the overall stroke of the damper. In the second working state, the thickness of the plate directly limits the spacing between the intermediate bearing plate and the bottom plate of the housing, and it participates in axial force sharing with the intermediate bearing plate. This is equivalent to adding a rigid pressure-bearing component to the upper end of the damper, maintaining the damper in a pre-compressed state while improving the overall support stiffness and anti-overturning stability of the housing relative to the mounting base. Simultaneously, it avoids the assembly complexity and consistency issues associated with adjusting the preload with multiple bolts one by one.

[0011] According to one embodiment of the present invention, the insert plate has an inner end and an outer end along the insertion direction, the inner end is provided with a connecting portion, and the outer end is provided with a lifting hole; When the insert plate is in the withdrawn position in the first working state, the connecting part is forcefully connected to the side wall of the mechanism housing.

[0012] Through the above structural design, the insert plate has a connecting part at its inner end for connecting with the side wall of the mechanism housing, and a lifting hole at its outer end for attaching lifting tools. This allows the same insert plate to perform two functions under different working conditions: spacing limitation and lifting support. In the second working state, the inner end of the insert plate is inserted between the intermediate bearing plate and the bottom plate of the housing, using its thickness to limit the distance between them and participate in axial bearing. In the first working state, the insert plate is removed from its insertion position and connected to the side wall of the housing via the connecting part. The lifting hole at the outer end is used to cooperate with the lifting mechanism to complete the lifting and transportation of the entire machine. Compared with the scheme of setting up separate lifting lugs, this dual-purpose structure reduces the number of dedicated lifting components, simplifies the external structural layout of the housing, and facilitates the rational selection of lifting points according to the actual layout of the mechanism housing, improving the convenience of lifting operations and the compactness of the overall layout.

[0013] According to one embodiment of the present invention, the mechanism housing is provided with a sliding groove extending from the side wall of the mechanism housing to the bottom plate of the housing, and a force-bearing part is formed at one end of the sliding groove near the side wall of the mechanism housing; The connecting part of the insert plate includes a force-receiving slider assembled in the slide groove. The force-receiving slider slides in conjunction with the slide groove to guide the insert plate to move between the first working state and the second working state. In the first working state, the force-receiving slider is located at one end of the slide groove near the side wall of the mechanism housing and abuts against the force-receiving part.

[0014] With the above arrangement, the integrated sliding groove extending from the side wall to the bottom plate of the mechanism box provides a closed guide channel for the insert plate. The force-bearing slider in the connecting part is constrained within the sliding groove throughout its entire length. When switching between the first and second working states, the position adjustment can be completed simply by sliding along the sliding groove, without disassembling the insert plate body, thus avoiding the risk of detachment due to misoperation during construction. The force-bearing part located near the side wall end of the sliding groove serves as the stop surface and force-bearing surface of the slider in the first working state, ensuring that the insert plate reliably abuts against the reinforced area near the side wall of the box during lifting. The entire box shell structure bears the lifting load, which helps improve safety and structural rigidity under lifting conditions. At the same time, the sliding cooperation between the slider and the sliding groove limits the movement direction and stroke of the insert plate, ensuring that the insert plate maintains a stable relative position with the guide column and intermediate bearing plate during insertion and extraction. This facilitates insertion and extraction operations in confined spaces and reduces assembly difficulty.

[0015] According to one embodiment of the present invention, the number of the insert plates is two, and they are respectively disposed on two opposite sides of the mechanism housing along its length direction; The slide is configured as two tracks, which extend from the two opposite side walls of the mechanism housing along its length to the bottom plate of the housing.

[0016] By placing paired insert plates on opposite sides of the mechanism housing along its length, and forming two sliding grooves extending from the side walls to the bottom plate of the housing on the corresponding side walls, the two insert plates are symmetrically arranged and can be inserted and removed synchronously along the length. This facilitates the even distribution of lifting points from both sides during the hoisting of the entire machine, reducing swaying and torsion caused by the shift in the center of gravity, and improving the balance during lifting and transportation. On the other hand, the sliding grooves on both sides guide the corresponding insert plates, which helps to form stable multi-point support at both ends of the housing, improving the overall stability of the vibration damping components along the length.

[0017] According to one embodiment of the present invention, the mechanism housing is generally rectangular in shape; The guide pillars are provided in four pairs and are symmetrically arranged in pairs at the four corners of the bottom plate of the box. The vibration damping component includes four spring damping dampers, which are respectively arranged corresponding to each of the guide columns, and each spring damping damper includes a damping cylinder arranged in the vertical direction and a helical compression spring sleeved on the outer periphery of the damping cylinder. The upper end of the damping cylinder extends upward and is fixedly connected to the bottom plate of the box, and its upper end forms the corresponding guide post so that the intermediate bearing plate is slidably sleeved on the upper end.

[0018] By symmetrically arranging four guide pillars in pairs at the four corners of the box's bottom plate, and making each of the four damping components a spring-damped vibration damper corresponding to each guide pillar, a "four-corner support" arrangement that is basically symmetrical about the center of gravity of the mechanism box is formed. Each damping component consists of a damping cylinder arranged vertically and a helical compression spring around its outer periphery. The upper end of the damping cylinder extends upward and is fixedly connected to the bottom plate of the box, and its upper end also serves as a guide pillar for the intermediate bearing plate to slide on, thus integrating the guiding and damping functions in the same component. This arrangement, on the one hand, allows the self-weight of the mechanism box and the vibration load during operation to be evenly transferred to the mounting base through the four corners, reducing local stress concentration and improving the overall anti-overturning stability; on the other hand, the elasticity and damping characteristics of the spring-damped vibration dampers attenuate the vibration along the vertical direction, which helps to improve the overall vibration reduction performance of the machine while maintaining a compact structure.

[0019] According to one embodiment of the present invention, the intermediate support plate includes a first intermediate support plate and a second intermediate support plate arranged at intervals along the length direction of the mechanism housing; The mounting base includes a first mounting base and a second mounting base arranged at intervals along the length of the mechanism housing; The four spring-damped vibration dampers are divided into two groups. Each group includes two spring-damped vibration dampers symmetrically arranged along the width direction of the mechanism housing. One group is located between the first intermediate bearing plate and the first mounting base, and the other group is located between the second intermediate bearing plate and the second mounting base, so as to support the two ends of the mechanism housing in its length direction respectively.

[0020] By dividing the intermediate bearing plate into a first intermediate bearing plate and a second intermediate bearing plate spaced apart along the length of the mechanism housing, and correspondingly setting a first mounting base and a second mounting base on the mounting base side, the four spring damping vibration dampers are divided into front and rear groups, supporting the two ends of the mechanism housing along its length. Each group contains two vibration dampers symmetrically arranged along its width. This structure, on the one hand, allows each end of the mechanism housing to form a locally rigid vibration damping support unit, enabling it to more evenly bear the weight of the housing and the vibration load during operation, reducing bending stress in the middle of the base plate and the risk of overall warping. On the other hand, the relatively dispersed space occupied by the front and rear mounting bases on the crossarm facilitates adjustment of the installation posture through the two sets of supports when there is local unevenness on the crossarm or limited bolt hole arrangement, improving the adaptability and stability of the overall installation.

[0021] According to one embodiment of the present invention, the inner end of the insert plate is provided with a clearance notch, which is used to avoid the guide post when inserted between the intermediate support plate and the bottom plate of the box.

[0022] By providing an avoidance notch at the inner end of the insert plate, the insert plate can bypass the guide post located near the insertion channel when inserted between the intermediate bearing plate and the bottom plate of the housing, avoiding interference or hard collision with the guide post. This allows for sufficient effective load-bearing area for the insert plate without reducing the diameter and strength of the guide post, ensuring its reliability in bearing loads during the second working state.

[0023] According to one embodiment of the present invention, the lifting hole includes a strip-shaped hole disposed at the outer end of the insert plate, the length direction of the strip-shaped hole being disposed along the width direction of the mechanism housing, and a plurality of recesses being formed on the inner edge of the strip-shaped hole at intervals along the length direction.

[0024] By designing the lifting hole as a strip-shaped opening at the outer end of the insert plate, with the length of the strip-shaped opening aligned with the width of the mechanism housing, and creating multiple recessed sections at intervals along the length of the inner edge of the strip-shaped opening, the hooks of the lifting tools can be positioned at different points within the strip-shaped opening as needed. On one hand, installers can flexibly adjust the lifting point position in the width direction according to the on-site conductor routing, tower structure, and overall center of gravity, reducing sway and torsion during lifting and improving lifting balance and operational safety. On the other hand, the strip-shaped opening accommodates both hand-held handling and mechanical lifting scenarios, providing a continuously adjustable stress area at the outer end of the insert plate without adding additional lifting lugs, which helps reduce localized stress concentration.

[0025] According to one embodiment of the present invention, the inner end of the insert plate is formed with a guide portion that narrows along the insertion direction; The intermediate support plate and the bottom plate of the box body respectively form an inlet slope at the insertion point of the insert plate to cooperate with the inlet part.

[0026] By machining the inner end of the insert plate into a narrowing guide section along the insertion direction, and forming guide ramps that mate with the guide section at the insertion positions of the intermediate support plate and the bottom plate of the housing, the insert plate can automatically center itself and gradually enter the designed position during insertion under the action of the guide section and the upper and lower ramps. On the one hand, even with slight deviations in the insertion angle or minor deformations on site, the ramps can guide and self-correct, reducing jamming and bumping, and facilitating insertion and removal operations in narrow spaces. On the other hand, the transitional contact between the guide section and the guide ramps replaces the sharp-angle hard contact, which helps reduce local impact and stress concentration on the edges of the intermediate support plate and the bottom plate of the housing, improving the structural reliability during long-term use.

[0027] (III) Beneficial Effects of the Invention: By setting a vibration damping assembly consisting of guide columns, an intermediate bearing plate, vibration damping components, and spacing limiting components with first and second working states between the bottom plate of the housing and the mounting base, the support stiffness of the mechanism housing relative to the tower crossarm can be switched between installation and operation conditions. In the installation condition, a large distance is maintained between the intermediate bearing plate and the mounting base, and the vibration damping components are under a small amount of compression, which can elastically absorb the impact and vibration during hoisting, handling, and positioning. In the operation condition, the spacing limiting components limit the intermediate bearing plate to a preset position relative to the bottom plate of the housing, further compressing the vibration damping components. While maintaining a certain vibration damping capacity, the overall support stiffness is improved, reducing the swaying and displacement of the mechanism housing under long-term wind vibration, icing, and other effects. The above-mentioned vibration damping assembly is directly arranged between the original housing and the mounting base without changing the primary and secondary electrical structures. The working condition switching can be achieved with a small number of mechanical parts, resulting in a compact structure that is easy to process and adjust on-site. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A three-dimensional structural diagram of the first working state of the vibration-resistant primary and secondary integrated pole-mounted circuit breaker provided in an embodiment of the present invention; Figure 2 A three-dimensional structural diagram of the second working state of the vibration-resistant primary and secondary integrated pole-mounted circuit breaker provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the mechanism housing provided in one embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of an insert plate provided in one embodiment of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the vibration damping component in its second working state according to an embodiment of the present invention.

[0030] Icons: 1. Mechanism housing; 11. Housing base plate; 111. Slide groove; 2. Pole column assembly; 3. Mounting base; 4. Vibration damping assembly; 41. Guide column; 42. Intermediate bearing plate; 43. Vibration damping component; 431. Spring damping vibration damper; 4311. Damping cylinder; 4312. Helical compression spring; 44. Insert plate; 441. Connecting part; 4411. Force-bearing slider; 442. Lifting hole; 4421. Recessed part; 443. Avoidance notch; 444. Guide part; 5. Guide slope. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Specific Implementation

[0032] like Figures 1 to 5 As shown, in this embodiment, the vibration-damping primary and secondary integrated pole-mounted circuit breaker is suitable for line segment locations erected on distribution towers. The mechanism housing 1 is arranged along the length of the tower crossarm, so that the phase arrangement direction of the pole assembly 2 is basically consistent with the line direction, facilitating the introduction and exit of the upper conductors from the sides or top of the pole assembly 2. The mounting base 3 is preferably located below the mechanism housing 1, and is arranged vertically opposite to the housing bottom plate 11 of the mechanism housing 1. The two are integrated and installed through the vibration damping component 4 and conventional fastening connection methods, thus forming a top-down load-bearing relationship of "pole assembly 2 - mechanism housing 1 - vibration damping component 4 - mounting base 3 - tower crossarm" in the structure.

[0033] The mounting base 3 can be a welded structure of steel plate or shaped steel. Its planar layout matches the upper surface or side of the tower crossarm. It is fixed to the tower crossarm through conventional connection methods such as bolt holes, clamps, or pressure plates, so that the mounting base 3 can reliably transfer the load to the tower structure when bearing the gravity and operating vibration from the mechanism housing 1. A certain vertical gap is reserved between the bottom plate 11 of the mechanism housing 1 and the mounting base 3. This gap is adjusted to different effective heights by the vibration damping components 4 under installation and operation conditions. This allows the mechanism housing 1 to obtain flexible vibration damping support during transportation, hoisting, and positioning, while maintaining a stable relative position to the mounting base 3, and to obtain high support stiffness and anti-overturning capacity during long-term operation. This balances the vibration damping protection of primary and secondary components with the overall installation stability of the machine.

[0034] In this embodiment, the mechanism housing 1 is generally rectangular, and the lower ends of its two opposite sidewalls along its length are respectively rolled downward to form through grooves 111. The grooves 111 extend from the inner surface of the sidewalls to near the bottom plate 11 of the housing, and the cross-section can be approximately inverted "U" shaped or other groove structures with a top opening, so as to form a guide space between the sidewalls and the bottom plate 11 of the housing for the reciprocating sliding of the connecting part 441. The bottom of the groove 111 near the sidewall of the mechanism housing 1 is locally thickened, bent into a step, or provided with an end shoulder to form a force-bearing part, so that the component sliding to this end can reliably bear the tensile and shear forces in the hoisting direction through surface contact, thereby avoiding stress concentration at a single weld point or bolt. The length direction of each slide 111 is consistent with the length direction of the mechanism housing 1. The two slides 111 are respectively arranged on the two opposite side walls of the mechanism housing 1, so that when the insert plate 44 moves in the slide 111, it only produces controlled displacement along the length direction and the insertion direction, and will not flip outward or come out.

[0035] Two insert plates 44 are provided, respectively arranged on two opposite sides of the mechanism housing 1 along its length. Each insert plate 44 is plate-shaped, with its inner end fixed to the force-bearing slider 4411 inside the slide groove 111 via a connecting part 441, and a lifting hole 442 machined on one side of its outer end. The force-bearing slider 4411 is machined into a block or strip structure that matches the inner cavity cross-section of the slide groove 111. Its outer contour maintains a fitting clearance with the bottom surface and sidewalls of the slide groove 111, allowing it to slide linearly in the slide groove 111 with low friction without significant shaking. The force-bearing slider 4411 can be connected to the connecting part 441 by welding, bolting, or riveting to achieve reliable force transmission. When the insert plate 44 moves from the second working state to the first working state, the force-bearing slider 4411 slides upward along the slide groove 111 until the end face of the slider abuts against the force-bearing part of the slide groove 111 near the side wall of the housing. At this time, the insert plate 44 is positioned on the outside of the side wall of the housing 1. The connecting part 441 distributes the lifting load to the plate structure of the side wall area of ​​the housing through the surface contact between the force-bearing slider 4411 and the force-bearing part. When the insert plate 44 moves from the first working state to the second working state, the force-bearing slider 4411 slides downward along the slide groove 111, guiding the inner end of the insert plate 44 past the edge of the bottom plate 11 of the housing and into the insertion channel between the bottom plate 11 of the housing and the intermediate bearing plate 42, thereby completing a smooth switch between the two working conditions without disassembling the insert plate 44.

[0036] To improve the smoothness of the insertion process and the fitting accuracy between the insert plate and the various components of the vibration damping assembly 4, the inner end of each insert plate 44 is machined into a gradually narrowing guide portion 444 along the insertion direction. The two sides of the guide portion 444 transition from the outside to the inside in a tapering shape, so that even if there are assembly deviations when the insert plate 44 approaches the insertion channel, its position can be automatically corrected by the contact action between the guide portion 444 and the guide slope 5 at the intermediate support plate 42 and the bottom plate 11 of the housing. The intermediate support plate 42 and the bottom plate 11 of the housing are respectively machined with guide slopes 5 at the edges of the predetermined insertion area of ​​the insert plate 44 towards the insertion channel. The two guide slopes 5 on both sides form a three-sided fit with the guide portion 444, so that the insert plate 44 is gradually guided to the designed parallel posture during the advancement process. Finally, its plate thickness is stably clamped between the intermediate support plate 42 and the bottom plate 11, which reduces the risk of jamming during the insertion and removal process and avoids local stress concentration caused by sharp corner hard contact. In addition, the inner end of the insert plate 44 is provided with a clearance notch 443. The opening of the clearance notch 443 faces the location of the guide post 41. Its shape and size match the outer contour of the guide post 41, so that the insert plate 44 can bypass the guide post 41 when it is inserted between the intermediate bearing plate 42 and the bottom plate 11 of the box, ensuring that the insert plate 44 has a sufficient effective force-bearing width without weakening the strength of the guide post 41.

[0037] The outer end of the insert plate 44 is machined with a lifting hole 442. The lifting hole 442 is a strip-shaped hole structure, and its length extends along the width direction of the mechanism housing 1, so that the lifting tool has a certain adjustment margin in the width direction. In order to meet the needs of both hand handling and mechanical lifting, the inner edge of the lifting hole 442 is formed with several recesses 4421 at intervals along its length direction. Each recess 4421 can be an arc-shaped or polygonal tooth-shaped structure that is recessed into the hole. During lifting, the lifting hook or sling can be engaged with any recess 4421 to form a local positioning point. Thus, based on the overall adjustment margin provided by the strip-shaped hole, more precise fine adjustment of the lifting point position can be achieved. The local engagement of the recess 4421 also inhibits the slippage of the hook along the length direction of the hole during the lifting process, which helps to improve the stability of the lifting posture and the safety of operation.

[0038] The vibration damping assembly 4 is installed between the bottom plate 11 of the housing and the mounting base 3. The assembly includes guide posts 41, intermediate bearing plate 42, vibration damping components 43, and insert plates 44 that serve as spacing limiters. In this embodiment, four guide posts 41 are provided and fixed to the four corners of the bottom plate 11 of the housing. Each guide post 41 is preferably formed by extending upward from the upper end of the damping cylinder 4311 of the corresponding vibration damping component 43. That is, the upper end of the damping cylinder 4311 is thickened and machined before being reliably fixed to the bottom plate 11 of the housing. The outer circular surface of the upper end directly serves as the sliding guide surface of the intermediate bearing plate 42. The vibration damping component 43 adopts four spring damping vibration dampers 431, which are arranged corresponding to each guide column 41. Each spring damping vibration damper 431 includes a damping cylinder 4311 arranged in the vertical direction and a helical compression spring 4312 sleeved on the outer periphery of the damping cylinder 4311. The upper and lower ends of the helical compression spring 4312 abut against the intermediate bearing plate 42 and the mounting base 3 respectively, so that the intermediate bearing plate 42 can move in the vertical direction relative to the bottom plate 11 of the box under the guidance of the guide column 41, and elastically isolates and dissipates the vibration from the mounting base 3 through the spring and damping element.

[0039] The intermediate support plate 42 is divided into a first intermediate support plate 42 and a second intermediate support plate 42 arranged at intervals along the length of the mechanism housing 1. The two intermediate support plates 42 respectively cover the front and rear ends of the mechanism housing 1 along its length. The mounting base 3 includes a first mounting base 3 and a second mounting base 3, which are arranged opposite to the two intermediate support plates 42 along the length of the mechanism housing 1 and are connected to the tower crossarm by bolts. The four spring damping vibration dampers 431 are divided into two groups. Each group includes two vibration dampers arranged symmetrically along the width of the mechanism housing 1. One group is arranged between the first intermediate support plate 42 and the first mounting base 3, and the other group is arranged between the second intermediate support plate 42 and the second mounting base 3, so that a local vibration damping support unit is formed at each end of the mechanism housing 1. With this arrangement of front and rear groups and left and right symmetry, the self-weight of the mechanism housing 1 and the dynamic load generated during operation can be more evenly distributed to the four corners, reducing the bending deformation in the middle of the housing bottom plate 11. When there is local unevenness in the tower crossarm or the bolt hole arrangement is restricted, the overall attitude can be corrected by fine adjustment of the height of the two sets of mounting bases 3.

[0040] When switching between the two working states of the vibration damping component 4, the position of the intermediate support plate 42 relative to the bottom plate 11 of the housing changes. In the first working state, both insert plates 44 are pulled to their extreme positions close to the side wall of the housing, and their insertion ends are completely out of the gap space between the intermediate support plate 42 and the bottom plate 11 of the housing. The intermediate support plate 42 moves downward under its own weight and the gravity of the housing 1 of the mechanism until its upper surface directly abuts against the lower surface of the bottom plate 11 of the housing, so that a large first gap is formed between the intermediate support plate 42 and the mounting base 3. At this time, the helical compression spring 4312 is in the first compression state and has a large usable deformation stroke, which is suitable for absorbing large displacement and impact energy during hoisting, handling and positioning. In the second working state, the insert plate 44 is inserted inward along the guide groove 111. The guide part 444 cooperates with the guide inclined surface 5 to complete automatic centering and enter the designed position. The plate thickness of the insert plate 44 is clamped between the intermediate support plate 42 and the bottom plate 11 of the box, so that the intermediate support plate 42 is lifted relative to the bottom plate 11 of the box and fixed at the preset height. At this time, the distance between the intermediate support plate 42 and the mounting base 3 is reduced to the second distance. The helical compression spring 4312 is in the second compression state, which is greater than the first compression amount. The overall support stiffness is increased. The intermediate support plate 42 and the insert plate 44 jointly bear the axial load transmitted from the bottom plate 11 of the box, which is more suitable for controlling wind vibration and icing vibration under long-term operating conditions.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vibration-damping primary and secondary integrated pole-mounted circuit breaker, comprising a mechanism housing, an electrode assembly disposed on the mechanism housing, and a mounting base for mounting the mechanism housing on a pole crossarm, characterized in that, A vibration damping assembly is provided between the mounting base and the bottom plate of the mechanism housing. The vibration damping assembly includes: Several guide columns are fixed to the bottom plate of the box and extend downward; An intermediate support plate is slidably sleeved on each of the guide columns, so that the intermediate support plate can move relative to the bottom plate of the box along the axial direction of the guide columns; A vibration damping component is disposed between the intermediate bearing plate and the mounting base to provide elastic support between the intermediate bearing plate and the mounting base; A spacing limiting element is detachably or movably disposed between the intermediate support plate and the bottom plate of the box body; The spacing limiting member has a first working state and a second working state; In the first working state, there is a first gap between the intermediate bearing plate and the mounting base, and the vibration damping member is under a first compression. In the second working state, the spacing limiting member restricts the intermediate bearing plate to a preset position relative to the bottom plate of the box, so that there is a second spacing between the intermediate bearing plate and the mounting base that is less than the first spacing, and the vibration damping member is compressed to a second compression amount that is greater than the first compression amount.

2. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that, The spacing limiter is a insert plate that is radially movable along the guide post and is configured to move between an insertion position and a withdrawal position. In the first working state, the insert plate is in the pulled-out position, so that the upper surface of the intermediate support plate abuts against the lower surface of the box bottom plate; In the second working state, the insert plate is inserted between the intermediate support plate and the bottom plate of the housing. The thickness of the insert plate is used to limit the distance between the intermediate support plate and the bottom plate of the housing, so that the intermediate support plate and the mounting base have the second distance, and together with the intermediate support plate, they bear the axial load transmitted from the bottom plate of the housing to the vibration damping component.

3. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 2, characterized in that, The insert plate has an inner end and an outer end along the insertion direction, the inner end is provided with a connecting part, and the outer end is provided with a lifting hole; When the insert plate is in the withdrawn position in the first working state, the connecting part is forcefully connected to the side wall of the mechanism housing.

4. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 3, characterized in that, The mechanism housing is provided with a sliding groove extending from the side wall of the mechanism housing to the bottom plate of the housing, and the sliding groove forms a force-bearing part at one end near the side wall of the mechanism housing; The connecting part of the insert plate includes a force-receiving slider assembled in the slide groove. The force-receiving slider slides in conjunction with the slide groove to guide the insert plate to move between the first working state and the second working state. In the first working state, the force-receiving slider is located at one end of the slide groove near the side wall of the mechanism housing and abuts against the force-receiving part.

5. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 4, characterized in that, The number of the insert plate components is two, and they are respectively arranged on two opposite sides of the mechanism housing along its length; The slide is configured as two tracks, which extend from the two opposite side walls of the mechanism housing along its length to the bottom plate of the housing.

6. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 5, characterized in that, The overall shape of the mechanism box is rectangular; The guide pillars are provided in four pairs and are symmetrically arranged in pairs at the four corners of the bottom plate of the box. The vibration damping component includes four spring damping dampers, which are respectively arranged corresponding to each of the guide columns, and each spring damping damper includes a damping cylinder arranged in the vertical direction and a helical compression spring sleeved on the outer periphery of the damping cylinder. The upper end of the damping cylinder extends upward and is fixedly connected to the bottom plate of the box, and its upper end forms the corresponding guide post so that the intermediate bearing plate is slidably sleeved on the upper end.

7. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 6, characterized in that, The intermediate support plate includes a first intermediate support plate and a second intermediate support plate arranged at intervals along the length direction of the mechanism box; The mounting base includes a first mounting base and a second mounting base arranged at intervals along the length of the mechanism housing; The four spring-damped vibration dampers are divided into two groups. Each group includes two spring-damped vibration dampers symmetrically arranged along the width direction of the mechanism housing. One group is located between the first intermediate bearing plate and the first mounting base, and the other group is located between the second intermediate bearing plate and the second mounting base, so as to support the two ends of the mechanism housing in its length direction respectively.

8. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 6, characterized in that, The inner end of the insert plate is provided with a clearance notch, which is used to avoid the guide post when it is inserted between the intermediate support plate and the bottom plate of the box.

9. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to any one of claims 5 to 8, characterized in that, The lifting hole includes a strip-shaped hole located at the outer end of the insert plate. The length direction of the strip-shaped hole is along the width direction of the mechanism housing. Several recesses are formed on the inner edge of the strip-shaped hole at intervals along the length direction.

10. The vibration-damping primary and secondary integrated pole-mounted circuit breaker according to claim 9, characterized in that, The inner end of the insert plate is formed with a guide portion that narrows along the insertion direction; The intermediate support plate and the bottom plate of the box body respectively form an inlet slope at the insertion point of the insert plate to cooperate with the inlet part.

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