A kind of sealing plate device for marine medium voltage cabinet interlock
Patent Information
- Application Number
- CN202522616943.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-12-10
AI Technical Summary
传统螺栓固定式封板拆装需借助工具，操作繁琐、耗时较长，已无法满足快速检修的需求；而缺乏可靠联锁的结构，也与船舶安全管理的严格要求相悖
[0015]本实用新型的有益效果在于：本实用新型所提供的用于船用中压柜联锁的封板装置，针对现有船用中压柜封板的缺陷，通过针对性的结构设计，实现了多维度的性能提升。首先，相较于现有螺栓固定无强制联锁的形式，本装置通过支点台阶螺母限位、上封板与下封板嵌配、 定位杆与限位套定位 以及锁定走锁定实现了多点协同机械联锁，形成了强制防护机制，从结构层面杜绝了误开封板、误入带电间隔的风险，完全符合国家标准及船级社规范的“五防”安全要求，大幅提升了船用中压柜的运行安全等级；第二，针对船舶舱室柜后操作空间狭小的特点，采用挂接 + 定位 的装配形式，上封板通过上封板配合孔 直接挂接于支点台阶螺母，下封板通过定位杆快速嵌合于限位套，无需传统门板所需的开启空间，仅在柜后预留的有限空间内即可完成拆装操作，完美适配船舶紧凑的设备布置环境；第三，本结构通过上封板与下封板之间的嵌配压紧、定位杆与限位套的嵌合配合，形成了多向约束的稳定结构，可有效抵抗航行振动带来的松动风险，确保封板在船舶动态工况下长期保持可靠固定，且安装拆卸过程无需复杂工具与专业技能，操作人员可快速完成封板的拆装作业，缩短了检修维护的工时，提升了船用中压柜的运维效率；最后，上封板、下封板与一对支点台阶螺母采用热镀锌与喷塑的多重防腐处理，可耐受船舶高盐雾、高湿度的恶劣环境，大幅降低了封板因腐蚀失效的概率，延长了部件使用寿命，减少了设备的维护频次与运维成本。
Smart Images
Figure CN224804494U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of marine machinery and equipment, specifically relating to a sealing plate device for interlocking marine medium-pressure cabinets. Background Technology
[0002] Medium-voltage switchgear is a core component of a ship's electrical system, responsible for core functions such as propulsion system operation, power supply for navigation and communication equipment, and operation of living facilities. Its reliability and safety directly determine the ship's navigation safety, operational efficiency, and the safety of personnel and property. As a core hub device in the ship's electrical system, the medium-voltage switchgear is responsible for the distribution, control, protection, and fault isolation of medium-voltage power. It is a key component ensuring the stable operation of the power system and is widely used in various types of vessels and offshore floating facilities, including ocean-going cargo ships, cruise ships, special-purpose vessels, and offshore platforms. The internal chambers of the medium-voltage switchgear, such as the cable compartment, busbar compartment, and circuit breaker compartment, are all high-voltage energized areas. During long-term voyages, these areas are affected by factors such as the marine environment (salt spray, high humidity, vibration), power load fluctuations, and equipment aging. Regular maintenance and repair work is required for these areas, including insulation testing, component tightening, and fault diagnosis. To meet maintenance accessibility requirements, the aforementioned high-voltage energized parts must be equipped with openable sealing plates. These plates must not only possess sufficient mechanical strength and protective performance (such as dustproof, waterproof, and foreign object intrusion prevention) to adapt to the harsh environment of ship cabins, but also ensure ease of operation to guarantee efficient maintenance work. According to Chinese national standards GB / T3906-2020 3.6kV~40.5kV AC metal-enclosed switchgear and controlgear, GB14048.1-2020 Low-voltage switchgear and controlgear Part 1: General technical requirements, and the mandatory specifications of international classification societies (such as China Classification Society (CCS), Det Norske Veritas (DNV), and Lloyd's Register (LR), marine medium-voltage switchgear must possess "five-proof" safety interlocking functions: preventing accidental opening and closing of circuit breakers, preventing opening and closing of disconnecting switches under load, preventing the connection (or closing) of grounding wires (grounding switches) while energized, preventing the closing of circuit breakers (disconnecting switches) with grounding wires (grounding switches) connected, and preventing accidental entry into energized compartments. Among them, "preventing accidental entry into energized compartments" is the core line of defense to ensure the personal safety of maintenance personnel. Because the energy of a single fault in the ship's medium-voltage system is large, once personnel accidentally enter an energized compartment, it is very easy to cause fatal accidents such as arc burns and high-voltage electric shocks. This can not only cause casualties, but may also lead to the paralysis of the power system, which in turn can cause a chain of disasters such as loss of control of the ship, grounding, and fire. Its harm is far greater than that of land-based power equipment.
[0003] However, the existing mainstream marine medium-voltage switchgear enclosure structures generally have design flaws, making it difficult to simultaneously meet safety regulations and the special operating conditions of ships: First, existing enclosures mostly use simple bolt fixing or ordinary snap-fit connections, without mechanical interlocking mechanisms that force linkage with the cabinet's energized state. Their safety protection relies entirely on the professional skills, safety awareness, and operational standards of the operators, lacking physical constraints. During ship navigation, factors such as cabin turbulence, tight operating time, and personnel fatigue can easily lead to misoperations like "opening the cover for maintenance while energized," creating a significant safety hazard of accidentally entering an energized compartment. Some enclosures may also experience bolt loosening and snap-fit failure due to long-term ship vibration, not only reducing the protection level but also potentially causing equipment failure due to accidental enclosure detachment. Second, ship cabins (especially engine rooms and electrical distribution rooms) have extremely limited space and dense equipment layout. Medium-voltage switchgear is usually close to the bulkhead or arranged closely with other equipment, leaving only 30-80cm of operating space behind and to the side of the cabinet after installation, far less than the standard operating space for land-based electrical distribution rooms. Traditional sealing panels mostly adopt a swing door or hinged opening structure, which requires a large amount of side or rear space when opening. This not only may cause collisions with surrounding equipment and pipelines, but also makes it difficult to fully open the sealing panel. As a result, the operating space of maintenance personnel is limited, making it impossible to quickly access the core maintenance parts, which greatly reduces maintenance efficiency, prolongs the downtime of the power system, and affects the normal operation of the ship.
[0004] Furthermore, with the increasing electrification and intelligence of ships, the integration of medium-voltage switchgear is becoming higher, and the requirements for maintenance efficiency are also increasing. Traditional bolt-fixed switchgear requires tools for disassembly and assembly, which is cumbersome and time-consuming, and can no longer meet the needs of rapid maintenance; on the other hand, the lack of a reliable interlocking structure also contradicts the strict requirements of ship safety management. At present, although openable switchgear with reliable interlocking has been developed for land-based medium-voltage switchgear, land-based equipment is not limited by space and the environmental conditions are relatively mild. Its structure cannot be directly adapted to the compact space and harsh environment of ships. There is an urgent need to develop a marine medium-voltage switchgear switchgear structure that combines interlocking reliability, space adaptability, ease of operation, and environmental tolerance to solve the pain points of existing technologies and ensure the safe and stable operation of the ship's power system. Utility Model Content
[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a sealing plate device for interlocking marine medium-pressure cabinets that is suitable for compact ship compartments, has reliable interlocking, is easy to operate, and has excellent corrosion resistance.
[0006] The purpose of this utility model is achieved as follows: a sealing plate device for interlocking marine medium-pressure cabinets includes: an upper sealing plate, a lower sealing plate, a pair of fulcrum step nuts, and a locking shaft; wherein, the upper and lower sealing plates are arranged vertically and can be detachably assembled to a preset mounting position on the side of the medium-pressure cabinet body; the upper part of the lower sealing plate can cooperate and fix with the lower part of the upper sealing plate to achieve fixed installation; the two fulcrum step nuts are symmetrically fixed on the upper left and right sides of the side of the medium-pressure cabinet body, and the upper sealing plate is hooked on the two fulcrum step nuts and reciprocates with the fulcrum step nuts; the fulcrum step nuts can abut against the upper sealing plate body to limit the upward displacement of the upper sealing plate in the vertical direction; the locking shaft is rotatably inserted into the medium-pressure cabinet body, one end of the locking shaft protrudes from the side of the medium-pressure cabinet body and can engage with the lower sealing plate; by operating the locking shaft, the lower sealing plate and the medium-pressure cabinet body can be locked or unlocked.
[0007] In a specific embodiment of this utility model, a plurality of positioning rods are installed on one side of the lower sealing plate, and a plurality of limiting sleeves are fixed on the medium-pressure cabinet body at positions corresponding to the positioning rods. The limiting sleeves are cylindrical structures, and the plurality of positioning rods can be fitted into the mating holes of their respective limiting sleeves, thereby achieving positioning of the side of the lower sealing plate.
[0008] In another specific embodiment of this utility model, a lower sealing plate fitting protrusion is formed at the top of the lower sealing plate, and the lower sealing plate fitting protrusion has a multi-layered stepped structure along the direction away from the lower sealing plate; while an upper sealing plate fitting groove matching the shape of the lower sealing plate fitting protrusion is formed at the bottom of the upper sealing plate, and the lower sealing plate fitting protrusion can be fitted into the upper sealing plate fitting groove, and the side wall of the lower sealing plate fitting protrusion fits snugly with the groove wall of the upper sealing plate fitting groove, thereby realizing the positioning and fixing of the upper sealing plate and the lower sealing plate.
[0009] In another specific embodiment of this utility model, the lower sealing plate fitting protrusion has a stepped contour structure of “]”, and the lower sealing plate fitting protrusion has a vertical section parallel to the lower sealing plate body and two horizontal sections. Multiple through-type lower sealing plate positioning holes are also provided on the vertical section of the lower sealing plate fitting protrusion, and corresponding mounting holes are provided on the upper sealing plate. The multiple lower sealing plate positioning holes are used for fasteners to pass through to fix the fitting state of the upper sealing plate and the lower sealing plate.
[0010] In another specific embodiment of this utility model, the two fulcrum stepped nuts are a stepped integral structure, and the fulcrum stepped nut includes a nut head, a stepped mating section, and a screw section. An upper sealing plate assembly part is formed on the left and right sides of the upper sealing plate, arranged vertically. Multiple upper sealing plate mating holes are provided on the upper sealing plate assembly part to engage with the fulcrum stepped nuts. The upper sealing plate mating holes are elongated through holes arranged vertically. The screw section of the fulcrum stepped nut passes through the upper sealing plate mating hole and is fixedly connected to the medium-pressure cabinet body. The upper sealing plate mating hole and the stepped mating section of the fulcrum stepped nut reciprocate in a moving engagement. The nut head abuts against the assembly surface of the upper sealing plate assembly part. When the upper sealing plate moves upward until the stepped mating section of the fulcrum stepped nut abuts and engages with the bottom of the upper sealing plate mating hole, the fulcrum stepped nut can reliably limit the position of the upper sealing plate.
[0011] In another specific embodiment of this utility model, the width of the upper sealing plate mating hole is adapted to the outer diameter of the stepped mating section of the fulcrum stepped nut, and the vertical length of the upper sealing plate mating hole is not less than the preset moving stroke of the upper sealing plate; the diameter of the nut head of the fulcrum stepped nut is greater than the width of the upper sealing plate mating hole to form a stable abutting stepped structure.
[0012] In a further specific embodiment of this utility model, a locking tongue is formed at one end of the locking shaft protruding from the medium-pressure cabinet body, and a corresponding locking hole is provided on the lower sealing plate; the locking tongue can pass through the locking hole and protrude from the outer surface of the lower sealing plate and can rotate on the outside of the lower sealing plate; by moving the locking tongue, it can rotate about the axis of the locking shaft body; when the locking tongue moves to match the locking hole of the lower sealing plate, the lower sealing plate can pass through the locking tongue to realize the unlocking and relative movement between the lower sealing plate and the medium-pressure cabinet body; when the locking tongue moves to abut against the plate body of the lower sealing plate, the locking tongue can restrict the relative movement between the lower sealing plate and the medium-pressure cabinet body and achieve a locking state between the two.
[0013] In a further specific embodiment of this utility model, the locking tongue is a lever-type structure, and the locking hole of the lower sealing plate extends vertically; wherein, when the locking tongue is kept vertical and corresponds to the locking hole of the lower sealing plate, the lower sealing plate and the medium-pressure cabinet body are in a state of relative movement; when the locking tongue rotates upward to form a horizontal state, the lower sealing plate and the medium-pressure cabinet body are in a locked state.
[0014] In yet another specific embodiment of this utility model, the surfaces of the upper sealing plate, the lower sealing plate, and the pair of fulcrum step nuts are subjected to hot-dip galvanizing and powder coating for corrosion protection.
[0015] The beneficial effects of this utility model are as follows: The sealing plate device for interlocking marine medium-pressure switchgear provided by this utility model addresses the shortcomings of existing marine medium-pressure switchgear sealing plates and achieves multi-dimensional performance improvements through targeted structural design. First, compared with the existing bolt-fixed form without forced interlocking, this device achieves multi-point coordinated mechanical interlocking through fulcrum step nut limiting, upper and lower sealing plate fitting, positioning rod and limiting sleeve positioning, and locking movement locking, forming a forced protection mechanism. This structurally eliminates the risk of accidental opening of the sealing plate and accidental entry into energized compartments, fully complying with the "five-proof" safety requirements of national standards and classification society specifications, and significantly improving the operational safety level of marine medium-pressure switchgear. Second, considering the limited operating space behind the switchgear in ship compartments, a hook-and-loop connection is adopted... The positioning assembly method allows the upper sealing plate to be directly hooked onto the fulcrum step nut via its mating holes, while the lower sealing plate is quickly engaged with the limiting sleeve via a positioning rod. This eliminates the need for the opening space required by traditional door panels, allowing for assembly and disassembly within the limited space reserved at the rear of the cabinet, perfectly adapting to the compact equipment layout of ships. Thirdly, this structure, through the interlocking and pressing between the upper and lower sealing plates and the engagement of the positioning rod and the limiting sleeve, forms a multi-directional constraint and stable structure. This effectively resists the risk of loosening caused by navigation vibrations, ensuring the sealing plates remain reliably fixed under dynamic ship conditions. Furthermore, the installation and disassembly process requires no complex tools or specialized skills, allowing operators to quickly complete the assembly and disassembly, shortening maintenance time and improving the operational efficiency of marine medium-pressure cabinets. Finally, the upper and lower sealing plates and the pair of fulcrum step nuts undergo multiple anti-corrosion treatments, including hot-dip galvanizing and powder coating, to withstand the harsh environment of high salt spray and high humidity on ships. This significantly reduces the probability of sealing plate failure due to corrosion, extends component lifespan, and reduces equipment maintenance frequency and costs. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cooperation structure between the locking shaft and the lower sealing plate in this utility model; Figure 3 This is a planar sectional view of the upper and lower sealing plates fitting together in this utility model.
[0017] In the diagram: 1. Upper sealing plate, 11. Upper sealing plate fitting groove, 12. Upper sealing plate assembly part, 13. Upper sealing plate mating hole; 2. Lower sealing plate, 21. Lower sealing plate fitting protrusion, 22. Lower sealing plate positioning hole, 23. Lower sealing plate locking hole; 3. Pivot step nut, 31. Nut head, 32. Step mating section, 33. Screw section; 4. Locking shaft, 41. Locking tongue; 5. Medium-pressure cabinet body; 6. Positioning rod; 7. Limit sleeve. Detailed Implementation
[0018] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the utility model solution. Any formal but not substantive equivalent transformations made based on the utility model concept should be considered within the scope of the utility model's technical solution.
[0019] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 It refers to the position and state of the utility model, and therefore cannot be understood as a special limitation on the technical solution provided by the utility model.
[0020] Please see Figures 1 to 3 This paper illustrates a sealing plate device for interlocking marine medium-pressure switchgear, comprising: an upper sealing plate 1, a lower sealing plate 2, a pair of fulcrum stepped nuts 3, and a locking shaft 4; wherein the aforementioned upper sealing plate 1 and lower sealing plate 2 are arranged vertically and are detachably assembled to a preset mounting position on the side of the medium-pressure switchgear cabinet 5; the upper part of the aforementioned lower sealing plate 2 can cooperate and fix with the lower part of the upper sealing plate 1 to achieve fixed installation; and the two are detachably connected by a stepped interlocking structure, forming a complete side sealing surface of the medium-pressure switchgear cabinet 5; the two aforementioned fulcrum stepped nuts 3 are symmetrically fixed to the side of the medium-pressure switchgear cabinet 5. The upper sealing plate 1 is attached to the two aforementioned support step nuts 3 on the upper left and right sides of the part, and the upper sealing plate 1 is hung on the two aforementioned support step nuts 3 and reciprocates with the aforementioned support step nuts 3. The aforementioned support step nuts 3 can abut against the plate body of the upper sealing plate 1 to limit the upward displacement of the upper sealing plate 1 in the vertical direction. The upper sealing plate 1 is connected to the support step nuts 3 by a hanging method and can reciprocate along the support step nuts 3. At the same time, when the upper sealing plate 1 moves to the highest point, the support step nuts 3 directly abut against the plate body of the upper sealing plate 1, which structurally limits the upward displacement of the upper sealing plate 1 in the vertical direction and ensures the longitudinal stability of the upper sealing plate 1 after installation.
[0021] The aforementioned locking shaft 4 is rotatably inserted into the aforementioned medium-pressure cabinet body 5. One end of the aforementioned locking shaft 4 protrudes from the side of the medium-pressure cabinet body 5 and can engage with the lower sealing plate 2. By operating the aforementioned locking shaft 4, the aforementioned lower sealing plate 2 and the medium-pressure cabinet body 5 can be locked or unlocked. By rotating the locking shaft 4, the operator can lock or unlock the locking shaft and the lower sealing plate 2, thereby achieving the locking or disassembly of the lower sealing plate 2 and the medium-pressure cabinet body 5.
[0022] In this embodiment, a plurality of positioning rods 6 are installed on one side of the aforementioned lower sealing plate 2, and a plurality of limiting sleeves 7 are fixed on the aforementioned medium-pressure cabinet 5 at positions corresponding to the aforementioned positioning rods 6. The aforementioned limiting sleeves 7 are cylindrical structures, and the plurality of aforementioned positioning rods 6 can be fitted into the mating holes of their respective corresponding limiting sleeves 7, thereby achieving positioning of the side of the aforementioned lower sealing plate 2.
[0023] When the lower sealing plate 2 needs to be assembled, multiple positioning rods 6 on one side are precisely aligned with the corresponding limiting sleeves 7 on the medium-pressure cabinet body 5. The positioning rods 6 are fitted into the cylindrical mating holes of the limiting sleeves 7. The precise positioning of the side of the lower sealing plate 2 is achieved through the cooperation between the rods and sleeves, avoiding sealing failure or locking difficulties caused by assembly deviation. At the same time, the symmetrically arranged fulcrum stepped nuts 3 provide bidirectional balanced support for the upper sealing plate, avoiding tilting caused by unilateral force. The fitting of the positioning rods 6 and the limiting sleeves 7 not only achieves precise positioning of the lower sealing plate 2, but also resists vibration and turbulence during ship navigation, prevents the sealing plate from shifting, and ensures the reliability of sealing and interlocking.
[0024] Please continue reading Figure 1 and Figure 3 A lower sealing plate fitting protrusion 21 is formed at the top of the aforementioned lower sealing plate 2. The lower sealing plate fitting protrusion 21 has a multi-layered stepped structure along the direction away from the aforementioned lower sealing plate 2. At the bottom of the aforementioned upper sealing plate 1, an upper sealing plate fitting groove 11 is formed that matches the shape of the aforementioned lower sealing plate fitting protrusion 21. The aforementioned lower sealing plate fitting protrusion 21 can fit into the upper sealing plate fitting groove 11, and the sidewall of the aforementioned lower sealing plate fitting protrusion 21 fits snugly with the groove wall of the upper sealing plate fitting groove 11, thereby achieving the positioning and fixation of the aforementioned upper sealing plate 1 and lower sealing plate 2. During assembly, the lower sealing plate 2 is aligned upward with the upper sealing plate 1, so that the lower sealing plate fitting protrusion 21 is inserted into the upper sealing plate fitting groove 11 along the multi-layered stepped guide direction, so that the two form a perfectly matched complementary structure. This structure not only restricts the relative displacement of the upper sealing plate 1 and lower sealing plate 2 in the horizontal direction, but also ensures the coaxiality and sealing performance of the fitting.
[0025] Furthermore, the aforementioned lower sealing plate fitting protrusion 21 has a stepped outline structure of “]”, and the lower sealing plate fitting protrusion 21 has a vertical section parallel to the lower sealing plate 2 body and two horizontal sections. Multiple through lower sealing plate positioning holes 22 are also provided on the vertical section of the aforementioned lower sealing plate fitting protrusion 21, and corresponding mounting holes are provided on the aforementioned upper sealing plate 1. The multiple aforementioned lower sealing plate positioning holes 22 are used for fasteners to pass through to fix the fitting state of the aforementioned upper sealing plate 1 and lower sealing plate 2. The stepped fitting structure of the upper sealing plate 1 and the lower sealing plate 2 not only ensures the integrity of the sealing surface but also enhances the structural synergy, effectively preventing the intrusion of harsh marine environmental media such as seawater and humid air into the cabinet. In addition, the "]"-shaped stepped contour ensures the fit in the vertical direction through the vertical section and restricts the offset in the horizontal direction on both sides, forming an all-round positioning constraint to avoid skewness or misalignment during assembly. Combined with the locking of the positioning holes and fasteners, the upper and lower sealing plates form a mechanically integrated structure, which can withstand impact loads even under the severe vibration and turbulence conditions of ship navigation, prevent the fitting from loosening, and ensure structural stability.
[0026] In this embodiment, the two aforementioned fulcrum stepped nuts 3 are a stepped integral structure, and the aforementioned fulcrum stepped nuts 3 include a nut head 31, a stepped mating section 32, and a screw section 33. An upper sealing plate assembly part 12 is formed on the left and right sides of the aforementioned upper sealing plate 1, arranged vertically. Multiple upper sealing plate mating holes 13 are provided on the upper sealing plate assembly part 12 to engage with the fulcrum stepped nuts 3. The aforementioned upper sealing plate mating holes 13 are elongated through holes arranged vertically. The screw section 33 of 3 passes through the aforementioned upper sealing plate mating hole 13 and is fixedly connected to the aforementioned medium-pressure cabinet body 5. The aforementioned upper sealing plate mating hole 13 and the aforementioned fulcrum step nut 3's stepped mating section 32 reciprocate to engage. The aforementioned nut head 31 abuts against the aforementioned upper sealing plate assembly part 12's assembly surface. When the aforementioned upper sealing plate 1 moves upward until the aforementioned fulcrum step nut 3's stepped mating section 32 abuts against the bottom of the aforementioned upper sealing plate mating hole 13, the aforementioned fulcrum step nut 3 can reliably limit the aforementioned upper sealing plate 1.
[0027] Furthermore, the width of the aforementioned upper sealing plate mating hole 13 is adapted to the outer diameter of the stepped mating section 32 of the aforementioned fulcrum stepped nut 3, and the vertical length of the upper sealing plate mating hole 13 is not less than the preset travel of the upper sealing plate 1; the diameter of the nut head 31 of the aforementioned fulcrum stepped nut 3 is greater than the width of the aforementioned upper sealing plate mating hole 13 to form a stable abutting stepped structure. Specifically, the length direction of the upper sealing plate mating hole 13 is consistent with the moving direction of the upper sealing plate 1, and forms a sliding fit with the stepped mating section 32 of the fulcrum stepped nut 3. The operator can push the upper sealing plate 1 vertically, so that the upper sealing plate mating hole 13 moves up and down along the stepped mating section 32 to achieve fine adjustment of the installation position. When it is necessary to limit the upward displacement of the upper sealing plate 1, push the upper sealing plate 1 until the stepped mating section 32 and the bottom of the upper sealing plate mating hole 13 are fully engaged. At this time, the axial end face of the stepped mating section 32 and the bottom of the upper sealing plate mating hole 13 form a mechanical block. Combined with the reverse limit of the nut head 31, a reliable two-way limit is achieved for the upper sealing plate 1 to prevent it from moving excessively.
[0028] Please continue reading Figure 1 and Figure 2A locking tongue 41 is formed at one end of the aforementioned locking shaft 4 protruding from the aforementioned medium-pressure cabinet body 5, and a corresponding lower sealing plate locking hole 23 is provided on the aforementioned lower sealing plate 2. The aforementioned locking tongue 41 can pass through the lower sealing plate locking hole 23 and protrude from the outer surface of the aforementioned lower sealing plate 2, and can rotate on the outside of the lower sealing plate 2. By moving the aforementioned locking tongue 41, it can be rotated about the axis of the aforementioned locking shaft 4. When the aforementioned locking tongue 41 moves to match the lower sealing plate locking hole 23, the aforementioned lower sealing plate 2 can pass through the locking tongue 41 to realize the unlocking and relative movement between the lower sealing plate 2 and the aforementioned medium-pressure cabinet body 5. When the aforementioned locking tongue 41 moves to abut against the plate body of the aforementioned lower sealing plate 2, the aforementioned locking tongue 41 can restrict the relative movement between the aforementioned lower sealing plate 2 and the aforementioned medium-pressure cabinet body 5 and achieve a locking state between the two.
[0029] Furthermore, the aforementioned locking tongue 41 is a lever-type structure, while the aforementioned lower sealing plate locking hole 23 extends vertically. When the aforementioned locking tongue 41 remains vertical and corresponds to the lower sealing plate locking hole 23, the aforementioned lower sealing plate 2 and the medium-pressure cabinet body 5 are in a state of relative movement. When the aforementioned locking tongue 41 rotates upward 90 degrees to form a horizontal state, the aforementioned lower sealing plate 2 and the medium-pressure cabinet body 5 are in a locked state. By setting the lever-type locking tongue 41 structure, the user does not need complicated tools and only needs to manually turn it to complete the locking or unlocking. It is suitable for the needs of limited space and rapid maintenance in marine scenarios. The operation efficiency is far superior to the traditional bolt locking structure. Moreover, the horizontal locking tongue 41 forms a surface contact with the lower sealing plate 2, with a large contact area and uniform force, which can effectively resist the severe vibration and turbulence during ship navigation, prevent the locking tongue from accidentally rotating and causing unlocking, and the locking state is intuitively visible, making it easy for operators to confirm the locking effect.
[0030] Preferably, the surfaces of the aforementioned upper sealing plate 1, lower sealing plate 2, and a pair of fulcrum step nuts 3 are treated with hot-dip galvanizing and powder coating for corrosion protection. The synergistic effect of the aforementioned dual protective layers of hot-dip galvanizing and powder coating results in an exponential improvement in protection compared to a single corrosion protection treatment. The zinc layer can resist electrochemical corrosion, and the powder coating can resist physical wear and chemical media erosion, blocking corrosive media such as seawater, salt spray, and humid air in the marine environment from eroding the component substrate and extending the service life of the component.
[0031] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above-mentioned technical effects column.
Claims
1. A sealing plate device for interlocking marine medium-pressure switchgear, characterized in that, include: The unit comprises an upper sealing plate (1), a lower sealing plate (2), a pair of fulcrum step nuts (3), and a locking shaft (4); wherein the upper sealing plate (1) and the lower sealing plate (2) are arranged vertically and can be detachably assembled on the side of the medium-pressure cabinet body (5) at a preset mounting position, and the upper part of the lower sealing plate (2) can cooperate with the lower part of the upper sealing plate (1) to achieve fixed installation of the two; the two fulcrum step nuts (3) are symmetrically fixed on the upper left and right sides of the side of the medium-pressure cabinet body (5), and the upper sealing plate (1) is hung on the two fulcrum step nuts (4). The step nut (3) is positioned on the fulcrum step nut (3) and reciprocates with it. The fulcrum step nut (3) can abut against the upper sealing plate (1) to limit the upward displacement of the upper sealing plate (1) in the vertical direction. The locking shaft (4) is rotatably inserted into the medium-pressure cabinet body (5). One end of the locking shaft (4) protrudes from the side of the medium-pressure cabinet body (5) and can engage with the lower sealing plate (2). By operating the locking shaft (4), the lower sealing plate (2) and the medium-pressure cabinet body (5) can be locked or unlocked.
2. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 1, characterized in that: Multiple positioning rods (6) are installed on one side of the lower sealing plate (2), and multiple limiting sleeves (7) are fixed on the medium-pressure cabinet body (5) at positions corresponding to the positioning rods (6). The limiting sleeves (7) are cylindrical structures, and the multiple positioning rods (6) can be fitted into the mating holes of their respective limiting sleeves (7), thereby achieving positioning of the side of the lower sealing plate (2).
3. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 2, characterized in that: A lower sealing plate fitting protrusion (21) is formed at the top of the lower sealing plate (2), and the lower sealing plate fitting protrusion (21) has a multi-layered stepped structure in the direction away from the lower sealing plate (2); while an upper sealing plate fitting groove (11) matching the shape of the lower sealing plate fitting protrusion (21) is formed at the bottom of the upper sealing plate (1), and the lower sealing plate fitting protrusion (21) can fit into the upper sealing plate fitting groove (11) and the side wall of the lower sealing plate fitting protrusion (21) fits into the groove wall of the upper sealing plate fitting groove (11), thereby realizing the positioning and fixing of the upper sealing plate (1) and the lower sealing plate (2).
4. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 3, characterized in that: The lower sealing plate fitting protrusion (21) has a stepped profile structure of "]", and the lower sealing plate fitting protrusion (21) has a vertical section parallel to the body of the lower sealing plate (2) and two horizontal sections. Multiple through-type lower sealing plate positioning holes (22) are also provided on the vertical section of the lower sealing plate fitting protrusion (21). Corresponding mounting holes are provided on the upper sealing plate (1). The multiple lower sealing plate positioning holes (22) are used for fasteners to pass through to fix the fitting state of the upper sealing plate (1) and the lower sealing plate (2).
5. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 1, characterized in that: The two fulcrum stepped nuts (3) are stepped integral structures, and the fulcrum stepped nuts (3) include a nut head (31), a stepped mating section (32), and a screw section (33). An upper sealing plate assembly part (12) is formed on the left and right sides of the upper sealing plate (1) respectively, arranged vertically. Multiple upper sealing plate mating holes (13) are provided on the upper sealing plate assembly part (12) to engage with the fulcrum stepped nuts (3). The upper sealing plate mating holes (13) are elongated through holes arranged vertically. The screw section of the fulcrum stepped nut (3) ( 33) Passing through the upper sealing plate mating hole (13) and being fixedly connected to the medium-pressure cabinet body (5), the upper sealing plate mating hole (13) and the step mating section (32) of the fulcrum step nut (3) are reciprocated and engaged, the nut head (31) abuts against the assembly surface of the upper sealing plate assembly part (12), when the upper sealing plate (1) moves upward until the step mating section (32) of the fulcrum step nut (3) abuts against the bottom of the upper sealing plate mating hole (13), the fulcrum step nut (3) can reliably limit the upper sealing plate (1).
6. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 5, characterized in that: The width of the upper sealing plate mating hole (13) is adapted to the outer diameter of the step mating section (32) of the fulcrum step nut (3), and the vertical length of the upper sealing plate mating hole (13) is not less than the preset travel of the upper sealing plate (1); the diameter of the nut head (31) of the fulcrum step nut (3) is greater than the width of the upper sealing plate mating hole (13) to form a stable abutting step structure.
7. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 1, characterized in that: A latch (41) is formed at one end of the locking shaft (4) protruding from the medium-pressure cabinet body (5), and a corresponding locking hole (23) is provided on the lower sealing plate (2); the latch (41) can pass through the locking hole (23) and protrude from the outer surface of the lower sealing plate (2) and can rotate on the outside of the lower sealing plate (2); by moving the latch (41), it can rotate about the axis of the locking shaft (4). When the latch (41) moves to match the locking hole (23) of the lower sealing plate, the lower sealing plate (2) can pass through the latch (41) to unlock and move relative to the cabinet body (5) of the medium-pressure cabinet; when the latch (41) moves to abut against the plate body of the lower sealing plate (2), the latch (41) can restrict the relative movement of the lower sealing plate (2) and the cabinet body (5) of the medium-pressure cabinet and achieve a locking state between the two.
8. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 7, characterized in that: The latch (41) is a lever-type structure, and the locking hole (23) of the lower sealing plate extends vertically. When the latch (41) is in a vertical state and corresponds to the locking hole (23) of the lower sealing plate, the lower sealing plate (2) and the medium-pressure cabinet body (5) are in a relatively moving state. When the latch (41) rotates upward (90) degrees to form a horizontal state, the lower sealing plate (2) and the medium-pressure cabinet body (5) are in a locked state.
9. A sealing plate device for interlocking marine medium-pressure switchgear according to claim 1, characterized in that: The surfaces of the upper sealing plate (1), the lower sealing plate (2), and the pair of fulcrum step nuts (3) are treated with hot-dip galvanizing and powder coating for corrosion protection.