Compact high-voltage outgoing line cabinet

Abstract

The utility model discloses a compact high -voltage outgoing line cabinet relates to transformer manufacturing technical field, aims at solving the low space utilization of existing equipment, poor heat dissipation, insufficient reliability and other problems. It includes cabinet body, top cover and base, and the cabinet body is divided into upper, middle, lower layer space through mounting panel, and the lower layer is equipped with lower disconnecting switch, and the contact blade is inner circular arc shape, and is matched with the linkage plate and lock catch structure, reduces the space occupation and promotes the operation accuracy, and the top cover is split type, and forms efficient heat dissipation system with the base cavity, and can switch heat dissipation mode according to temperature, and the integrated control panel, observation window and operating lever are convenient for operation and maintenance. The utility model improves space utilization, power transmission efficiency and equipment stability through the modularization stratification, structural innovation and heat dissipation optimization, and reduces the cost.

Description

Technical Field

[0001] This utility model relates to the field of transformer manufacturing technology, specifically to a compact high-voltage outgoing switchgear. Background Technology

[0002] High-voltage outgoing switchgear is a key piece of equipment in a power system that connects transmission lines and transformers, and its performance directly affects the stability and security of power transmission.

[0003] Existing high-voltage outgoing switchgear has several problems. For example, the isolating blades are mostly linear structures, requiring a large amount of safety space above, below, and in front when rotating, resulting in low space utilization and increased manufacturing costs. The layout of the functional modules inside the cabinet lacks optimization, which can easily lead to eddy current losses in the transformer core and reduce power transmission efficiency. The overall structure is not compact enough, and the space allocation is unreasonable. The ventilation structure of the cabinet is unreasonable, with the air inlet and outlet being too close, causing cold air to be discharged directly without flowing through the core heat source. The components inside the cabinet are densely packed, and there are areas that airflow cannot reach, making it easy for heat to accumulate locally.

[0004] To address the aforementioned issues, this utility model aims to achieve interference-resistant and compact design, improve equipment heat dissipation, and ensure equipment stability and ease of operation and maintenance through structural innovation and layout optimization. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a compact high-voltage outgoing switchgear. Through modular layered design, innovative isolating switch structure, and optimized heat dissipation system, it achieves the dual goals of improving space utilization and enhancing anti-interference performance.

[0006] This utility model adopts the following technical solution: a compact high-voltage outgoing line cabinet, including a cabinet body 1, a top cover 2, and a base 3, characterized in that: the cabinet body 1 includes a frame 1-1, a shell 1-2, an upper door panel 1-3, and a lower door panel 1-4; the frame 1-1 is composed of a square tubular structure with mounting holes on the outer surface and mounting grooves on the inner side, and the frame 1-1 is divided into an upper space 1-6, a middle space 1-7, and a lower space 1-8 by a horizontally arranged mounting plate 1-5; the mounting plate 1-5 and the frame 1-1 are rigidly connected by bolts, and a shock-absorbing structure is provided at the connection node; at the same time, a lower isolating switch 1-9 that can reduce interference with surrounding components is installed in the lower space 1-8; the lower isolating switch 1-9 includes an isolating blade 1-10, a linkage plate 1-11, a stationary contact 1-12, and a moving contact 1-13; the contact blade of the isolating blade 1-10 includes two contacts extending to both sides in an inner arc shape. The blade body 1-14 has a contact spring 1-15 and a locking hole 1-16 mounted on it. The linkage plate 1-11 is located between the stationary contact 1-12 and the moving contact 1-13. Its lower end is connected to the base frame through a connecting pin, and its upper end is connected to the isolating knife 1-10 through a connecting pin, thus limiting the lateral sway of the isolating knife 1-10. The moving contact 1-13 includes a contact seat 1-17 and a tripping limit plate 1-18. One end of the contact blade is fitted onto the contact seat 1-17 and rotates between the stationary contact 1-12 and the tripping limit plate 1-18 along the connecting shaft. One end of the stationary contact 1-12 includes a contact seat 1-17 and a locking plate. After closing, the locking plate engages between the locking holes 1-16 of the two contact blade bodies 1-14, forming a combined structure with locking force under the compression of the contact spring 1-15.

[0007] Preferably, a top cover 2 is provided above the upper space 1-6, and a heat dissipation mechanism is provided inside.

[0008] Preferably, the top cover 2 is a split structure, with the upper and lower layers separable; the lower layer is a flat sealed plate with a heat dissipation vent 2-1 with an external protruding edge on the surface; the upper layer has a corresponding ventilation pipe 2-2, the shape and size of which match the heat dissipation vent 2-1, and a groove is opened on the lower side to accommodate the protruding edge of the lower layer; the ventilation pipe 2-2 is equipped with an air exchange fan 2-3, and the outlet is equipped with a one-way opening dust cover 2-4; the heat dissipation vent 2-1, the ventilation pipe 2-2 and the air exchange fan 2-3 form a heat dissipation mechanism, which can switch the heat dissipation mode according to the temperature inside the cabinet.

[0009] Preferably, the base 3 has an internal cavity, ventilation holes and a filter layer on its four side walls, and airflow holes that are evenly distributed on the top sealing plate and communicate with the interior of the cabinet 1 to form a heat dissipation airflow channel.

[0010] Preferably, a control panel and indicator lights are installed on the upper door panel 1-3; and an observation window for the circuit breaker and an operating lever for the lower disconnect switch 1-9 are provided on the lower door panel 1-4.

[0011] Beneficial effects This utility model achieves significant progress through the following technical improvements: ①The inner arc-shaped contact blade of the lower disconnect switch described in this application significantly reduces the distance between the switch and surrounding components when the switch is open, compared with the traditional straight structure, thus significantly reducing the cabinet volume, saving material costs, and improving space utilization.

[0012] ②This application adopts a modular layered layout, which reduces the electromagnetic coupling between the disconnecting switch and the transformer, reduces the eddy current loss of the transformer, and improves the power transmission efficiency.

[0013] ③ The linkage plate and locking structure described in this application work together to improve the operating accuracy of the disconnecting switch, reduce contact resistance fluctuations, and reduce the failure rate; the vibration damping design of the connection node enhances the overall structural stability.

[0014] ④ This application also adopts a split top cover and base cavity to form a high-efficiency heat dissipation system, which can adjust the heat dissipation mode according to the temperature, effectively control the temperature rise inside the cabinet, and ensure the operating environment of the equipment.

[0015] ⑤ This application also integrates a control panel, observation window, and emergency operating lever design, which effectively shortens fault response time and improves operation and maintenance efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of the high-voltage outgoing switchgear.

[0017] Figure 2 This is a rear view of the high-voltage outgoing switchgear.

[0018] Figure 3 This is a side view of the high-voltage outgoing switchgear.

[0019] Figure 4 This is a top view of the top cover.

[0020] Figure 5 This is a front view of the top cover.

[0021] Figure 6 This is a schematic diagram of the lower disconnector switch structure.

[0022] In the diagram: Cabinet 1, Top cover 2, Heat dissipation vent 2-1, Ventilation pipe 2-2, Exhaust fan 2-3, Dust cover 2-4, Base 3, Frame 1-1, Shell 1-2, Upper door panel 1-3, Lower door panel 1-4, Mounting plate 1-5, Upper space 1-6, Middle space 1-7, Lower space 1-8, Lower isolating switch 1-9, Isolating blade 1-10, Linkage plate 1-11, Stationary contact 1-12, Moving contact 1-13, Contact blade body 1-14, Contact spring 1-15, Locking hole 1-16, Contact seat 1-17, Opening limit plate 1-18. Detailed Implementation

[0023] refer to Figure 1-6 This embodiment discloses a compact high-voltage outgoing line switch, the specific structure of which is as follows: The high-voltage outgoing line cabinet includes a cabinet body 1, a top cover 2, and a base 3, which are rigidly connected by bolts to form a closed and layered installation space. Among them: Cabinet 1: Composed of frame 1-1, shell 1-2, upper door panel 1-3 and lower door panel 1-4; Frame 1-1 is welded from square steel pipes with a cross-sectional size of 50mm×50mm. Mounting holes with a diameter of 10mm are opened every 100mm on the outer surface, and mounting grooves with a width of 20mm are opened along the length of the inner side; Shell 1-2 is made of cold-rolled steel plate with a thickness of 1.5mm, which is fixed to the outside of the frame with bolts to achieve dust and rain protection.

[0024] The frame 1-1 is divided into an upper space 1-6, a middle space 1-7 and a lower space 1-8 by a horizontally set mounting plate 1-5. The mounting plate 1-5 is an insulated steel plate, which is bolted to the frame. Rubber shock-absorbing washers are fitted at the connection nodes to reduce the transmission of vibration during equipment operation.

[0025] The lower disconnector switch 1-9 is fixedly installed in the lower space 1-8. Its structure includes an isolating blade 1-10, a linkage plate 1-11, a stationary contact 1-12, and a moving contact 1-13. The specific design is as follows: The contact blade of the isolating knife 1-10 consists of two inner arc-shaped contact blade bodies 1-14, made of copper with an arc radius of 150mm and an included angle of 60° between the two bodies. The contact spring is fixed to the contact blade body by bolts, and a locking hole 1-16 is opened in the middle. The linkage plate 1-11 is made of steel plate stamping, with its lower end hinged to the base frame by a stainless steel connecting pin, and its upper end connected to the isolating knife 1-10 by a connecting pin of the same specification, limiting the lateral sway angle of the isolating knife to ≤±5°, thus improving operational stability. One end of the stationary contact 1-12 is provided with a contact seat 1-17 and a locking plate, and the moving contact 1-13 includes a contact seat 1-17 and a tripping limit plate 1-18. One end of the isolating knife 1-10 is fitted onto the contact seat of the moving contact and can rotate around the connecting shaft between the stationary contact and the tripping limit plate.

[0026] When the circuit is closed, the locking plate of the stationary contact engages between the locking holes of the two contact blades, forming a locking structure under the compression of the contact spring; when the circuit is opened, the isolating blade rotates to contact the opening limit plate, at which point the distance between it and the stationary contact is ≥120mm, meeting the safety distance requirements.

[0027] A split-type top cover 2 is installed above the upper space 1-6, with an integrated heat dissipation mechanism inside. The lower layer of the top cover 2 is an aluminum plate with four heat dissipation vents 2-1 on the surface. A ventilation pipe 2-2 is installed at the corresponding position on the upper layer. The upper and lower layers of the top cover 2 are connected by a buckle. An air exchange fan 2-3 is installed in each ventilation pipe 2-2, and a one-way dust cover 2-4 is installed at the outlet, allowing only air to be discharged outward.

[0028] During operation, the temperature in the middle layer space is monitored. When the temperature is ≤40℃, the fan is turned off; when the temperature is 40℃<60℃, two fans run at low speed; when the temperature is >60℃, four fans run at high speed. The base 3 has a hollow structure with ventilation holes on the four side walls. The top cover plate has evenly distributed airflow holes, which are connected to the lower space of the cabinet, forming an airflow channel of "air intake at the base → heat dissipation inside the cabinet → exhaust at the top cover" to avoid heat accumulation.

[0029] The upper door panel 1-3 is equipped with a control panel and indicator lights to display the operating status and fault alarms respectively; the lower door panel 1-4 has a glass observation window, corresponding to the working position of the circuit breaker and the lower disconnecting switch; an insulated operating rod is provided below the observation window to facilitate manual opening and closing operations and shorten the fault response time.

[0030] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any simple modifications, equivalent changes, and alterations made to the following based on the technical essence of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A compact high-voltage outgoing switchgear, comprising a cabinet body (1), a top cover (2), and a base (3), characterized in that: The cabinet (1) includes a frame (1-1), a shell (1-2), an upper door panel (1-3), and a lower door panel (1-4). The frame (1-1) is composed of a square tube structure with mounting holes on the outer surface and mounting grooves on the inner side. The frame (1-1) is divided into an upper space (1-6), a middle space (1-7), and a lower space (1-8) by a horizontally arranged mounting plate (1-5). The mounting plate (1-5) is rigidly connected to the frame (1-1) by bolts, and a shock-absorbing structure is provided at the connection node. At the same time, a lower isolating switch (1-9) that can reduce interference with surrounding components is installed in the lower space (1-8). The lower isolating switch (1-9) includes an isolating blade (1-10), a linkage plate (1-11), a stationary contact (1-12), and a moving contact (1-13). The contact blade of the isolating blade (1-10) includes two blades that extend to both sides in an inner arc shape. Each contact blade body (1-14) has a contact spring (1-15) and a locking hole (1-16) mounted on it; a linkage plate (1-11) is located between the stationary contact (1-12) and the moving contact (1-13), with its lower end connected to the base frame via a connecting pin and its upper end connected to the isolating blade (1-10) via a connecting pin, thus limiting the lateral swaying of the isolating blade (1-10); the moving contact (1-13) includes a contact seat (1-17) and a tripping limit switch. Plate (1-18), one end of the contact blade is fitted onto the contact seat (1-17), and rotates along the connecting shaft between the stationary contact (1-12) and the tripping limit plate (1-18); one end of the stationary contact (1-12) includes the contact seat (1-17) and the locking plate. After closing, the locking plate is engaged between the locking holes (1-16) of the two contact blade bodies (1-14), forming a combined structure with locking force under the compression of the contact spring (1-15).

2. A compact high-voltage outgoing switchgear according to claim 1, characterized in that, A top cover (2) is provided above the upper space (1-6), and a heat dissipation mechanism is provided inside.

3. A compact high voltage outlet cabinet according to claim 1, characterized in that The top cover (2) is a split structure, and the upper and lower layers can be separated. The lower layer is a flat sealed plate with a heat dissipation vent (2-1) with an external protruding edge on the surface. The upper layer is provided with a ventilation pipe (2-2) at the corresponding position. Its shape and size match the heat dissipation vent (2-1), and a groove is opened on the lower side to accommodate the protruding edge of the lower layer. The ventilation pipe (2-2) is provided with an air exchange fan (2-3), and the outlet is provided with a dust cover (2-4) with a one-way opening. The heat dissipation vent (2-1), ventilation pipe (2-2) and air exchange fan (2-3) form a heat dissipation mechanism, which can switch the heat dissipation mode according to the temperature inside the cabinet.

4. A compact high voltage outlet cabinet according to claim 1, characterized in that The base (3) has an internal cavity, and the four side walls are provided with ventilation holes and filter layers. The top sealing plate is evenly distributed with airflow holes that communicate with the inside of the cabinet (1) to form a heat dissipation airflow channel.

5. A compact high voltage outlet cabinet according to claim 1, characterized in that The upper door panel (1-3) is equipped with a control panel and indicator lights; the lower door panel (1-4) is equipped with an observation window for the circuit breaker and an operating lever for the lower disconnect switch (1-9).

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