A compact integrated four-voltage transformer incoming line PT cabinet for 10kV looped network cabinet

Abstract

The utility model provides a compact integrated four voltage mutual inductor incoming line PT cabinet for 10kV looped netowrk cabinet relates to 10kV high voltage power transmission and distribution technical field, including the cabinet body still includes the top outside of the cabinet door rotation connection in the cabinet body, the cabinet door is attached to the outside of cabinet body top opening place, and the installation box is arranged in the bottom inside of cabinet body, and the inside of each installation box is equipped with voltage mutual inductor, and the first mounting bracket is movably arranged in the top inside of cabinet body, and the first limit piece is arranged in the inside of cabinet body, the limit piece is used for limiting the position of first mounting bracket, by integrating one installation box in single cabinet body, the power distribution room space is saved greatly, reduces a set of cabinet shell and part structural member consumption, reduces raw material consumption and manufacturing cost, can also eliminate and the interface problem and additional trouble point brought by cabinet, improves system security and operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of 10kV high voltage power transmission and distribution technology, and in particular to a compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet. Background Technology

[0002] Currently, in 10kV distribution network systems, gas-insulated ring main units (GNUS) are widely used due to their compact structure, high reliability, and maintenance-free operation. To improve power supply reliability and meet the needs of distribution automation systems for monitoring, protecting, and controlling the power grid's operational status, power operators such as China Southern Power Grid require ring main units to be equipped with incoming PT cabinets containing four voltage transformers (4PTs) in specific situations. The 4PT connection method (usually a VV connection combination or other special connections) provides more comprehensive voltage information for advanced functions such as accurate power calculation, insulation monitoring, and synchronization.

[0003] However, the current mainstream technical solution is to install two independent, standard-designed 2PT cabinets side by side to create a 4PT function. The side-by-side installation of two independent 2PT cabinets not only leads to a significant reduction in the utilization rate of the floor space in the switch station or distribution room, but also results in a large waste of raw materials such as cabinet panels, metal components, and insulation materials. Two independent cabinets mean two sets of outer shells, internal structural components, mounting brackets, busbar systems, and secondary wiring terminals, etc. At the same time, the complexity of operation and maintenance of traditional equipment increases and the safety risks are high. Utility Model Content

[0004] The purpose of this utility model is to provide a compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinets. This solves the problem that the existing mainstream technical solution is to install two independent, standard-designed 2PT cabinets side by side to create a 4PT function. The side-by-side installation of two independent 2PT cabinets not only significantly reduces the utilization rate of the floor space in the switch station or distribution room, but also wastes a large amount of raw materials such as cabinet panels, metal components, and insulation materials. Two independent cabinets mean two sets of outer shells, internal structural components, mounting brackets, busbar systems, and secondary wiring terminals, etc. At the same time, the complexity of operation and maintenance of traditional equipment increases and the safety risks are high.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet, comprising a cabinet body, and further comprising: The cabinet door is rotatably connected to the outer side of the top of the cabinet body, and the cabinet door fits against the outer side of the opening at the top of the cabinet body; The mounting box is located on the inner side of the bottom end of the cabinet, and a voltage transformer is installed on the inner side of each mounting box; The first mounting bracket is movably mounted on the inner side of the top of the cabinet. A first limiting member is disposed inside the cabinet, and the limiting member is used to limit the position of the first mounting bracket; The second mounting bracket is movably connected to the inner side of the top of the cabinet; The second limiting member is disposed inside the cabinet and is used to adjust the lateral position of the second mounting bracket inside the cabinet.

[0006] In one preferred embodiment, the mounting arm is fixedly connected to the inner side of the top of the cabinet; A limiting slide rail is fixedly connected to the upper surface of the mounting arm, and a trapezoidal through groove is provided on one side of the limiting slide rail; The slider is slidably connected to the inner side of the limiting slide rail, and the bottom end of the first mounting bracket is fixedly connected to one side of the slider. A limiting block is movably disposed on the inner side of both ends of the slider. An inclined structure is provided on the outer side of one end of the limiting block. The inclined structure at the end of the limiting block contacts the inner wall surface of the trapezoidal through groove on the inner side of the limiting slide rail.

[0007] In a preferred embodiment, the insert rod is movably disposed inside the slider; A limiting ball is fixedly connected to the outside of the insertion rod. The limiting ball has a spherical structure, and the outside of the limiting ball is in fixed contact with one side of the limiting block. A first spring is fixedly connected to the outer side of the end of the insertion rod, and the outer side of the end of the first spring away from the limiting ball is fixedly connected to the inner side of one end of the slider.

[0008] In a preferred embodiment, a push button is fixedly connected to the outer side of the end of the insertion rod away from the first spring, and the push button is made of silicone.

[0009] In a preferred embodiment, a friction strip is fixedly connected to one side of the limiting block. The friction strip is made of rubber, and the limiting block contacts the inner wall of the trapezoidal groove of the limiting slide rail through the friction strip.

[0010] As a preferred embodiment, a limiting plate is fixedly connected to the inner side of the top of the cabinet; The slots are evenly distributed on the inner side of one end of the limiting plate; A sliding sleeve is slidably connected to the outside of the limiting plate. The sliding sleeve moves along the axial direction of the limiting plate. The second mounting bracket is fixedly connected to one side of the sliding sleeve. A sleeve head is fixedly connected to the outer side of one end of the sliding sleeve, and the sleeve head is fitted onto the outer side of the limiting plate; The push plate is slidably connected to the inner sides of both ends of the sleeve; A limiting block is fixedly connected to one side of the push plate. The limiting block is inserted into the slot to limit the position of the sleeve.

[0011] In a preferred embodiment, a second spring is fixedly disposed on the outer side of one end of the push plate, and the outer side of the end of the second spring away from the limiting block is fixedly connected to the inner side of the middle part of the sleeve.

[0012] In a preferred embodiment, a handle is fixedly connected to one side of the sliding sleeve.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This compact, integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet boasts four major advantages: space saving, cost control, optimized operation and maintenance, and flexible layout, making it highly practical and economical. By integrating a single mounting box into a single cabinet, it significantly saves space in the distribution room, reduces the amount of cabinet shell and some structural components used, lowers raw material consumption and manufacturing costs, and eliminates interface problems and additional fault points caused by parallel cabinets, thereby improving system safety and operation and maintenance efficiency. It also supports dual flexible adjustment: pressing the push plate adjusts the position of the second mounting bracket, and pressing the button slides to adjust the layout of the first mounting bracket. This allows for quick adaptation to different installation requirements of electronic components without complicated operations, making it suitable for the compact and multifunctional use scenarios of ring main units. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of a compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet provided by this utility model. Figure 2 A schematic diagram of the cabinet and mounting box of a compact integrated 10kV ring main unit with four voltage transformers for incoming line PT. Figure 3 This utility model provides a compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet. Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the limiting plate and slot in a compact integrated 10kV ring main unit with four voltage transformers for the present invention. Figure 5 A schematic diagram of the sliding sleeve and sleeve in a compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet provided by this utility model; Figure 6A schematic diagram of the limiting block and the second spring in a compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet provided by this utility model. Figure 7 A schematic diagram of the structure of the mounting arm and limiting slide rail in the four voltage transformer incoming PT cabinet of a compact integrated 10kV ring main unit provided by this utility model; Figure 8 This utility model provides a cross-sectional view of the slider in a compact integrated 10kV ring main unit with four voltage transformers in the incoming PT cabinet.

[0015] Legend: 1. Cabinet body; 101. Cabinet door; 102. Mounting box; 2. First mounting bracket; 201. Mounting arm; 202. Limiting slide rail; 203. Slider; 204. Insert rod; 205. Limiting block; 206. Limiting ball; 207. First spring; 208. Friction strip; 209. Press button; 3. Second mounting bracket; 301. Limiting plate; 302. Slot; 303. Sliding sleeve; 304. Sleeve head; 305. Push plate; 306. Limiting insert block; 307. Second spring; 308. Handle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figure 1 - Figure 8 This embodiment provides a compact and integrated 10kV ring main unit with four voltage transformers for the incoming line PT cabinet, and its specific concept is as follows: A compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinet includes a cabinet body 1 and a cabinet door 101. The compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinet also includes a first mounting bracket 2 and a first limiting member.

[0018] The cabinet body 1 has a cabinet door 101 rotatably connected to the outer side of the top of the cabinet body 1. The cabinet door 101 can fit tightly against the outer side of the opening at the top of the cabinet body 1, thereby achieving a closed seal of the opening at the top of the cabinet body 1, which serves as a dustproof and protective function. The cabinet body 1 has an installation box 102 on the inner side of the bottom. Each installation box 102 has a voltage transformer installed on its inner side. The installation box 102 provides a stable installation space for the voltage transformer, ensuring its safety and stability during operation.

[0019] As some examples, in this embodiment, the first limiting member includes: mounting arm 201 and limiting slide rail 202.

[0020] The cabinet 1 has a first mounting bracket 2 movably installed on the inner side of its top. To precisely limit the position of the first mounting bracket 2, the cabinet 1 is equipped with a first limiting component. The inner side of the top of the cabinet 1 is also fixedly connected to a mounting arm 201, which serves as the mounting carrier for the limiting slide rail 202. The limiting slide rail 202 is fixedly connected to its surface. A trapezoidal through groove is provided on one side of the limiting slide rail 202, providing a suitable track structure for the sliding and limiting of the slider 203.

[0021] Meanwhile, a slider 203 is slidably connected to the inner side of the limiting slide rail 202, and the bottom end of the first mounting bracket 2 is fixedly connected to one side of the slider 203, so that the first mounting bracket 2 can slide along the limiting slide rail 202 through the slider 203 to achieve position adjustment. Limiting blocks 205 are movably provided on the inner sides of both ends of the slider 203, and an inclined structure is provided on the outer side of one end of the limiting block 205. The inclined structure contacts the inner wall of the trapezoidal through groove on the inner side of the limiting slide rail 202, and the initial limiting is achieved by the contact of the inclined surface. In addition, a rod 204 is movably provided on the inner side of the slider 203, and a spherical limiting ball 206 is fixedly connected to the outer side of the rod 204. The outer side of the limiting ball 206 is in close contact with one side of the limiting block 205. The movement of the rod 204 can cause the limiting ball 206 to squeeze or release the limiting block 205, thereby adjusting the degree of fit between the limiting block 205 and the limiting slide rail 202.

[0022] A first spring 207 is fixedly connected to the outer end of the insertion rod 204. The outer end of the first spring 207 away from the limiting ball 206 is fixedly connected to the inner end of the slider 203, providing a reset force for the insertion rod 204 and ensuring that the limiting ball 206 maintains stable pressure on the limiting block 205. A silicone button 209 is fixedly connected to the outer end of the insertion rod 204 away from the first spring 207. The silicone material has both good tactile feel and anti-slip properties, making it convenient for operators to press and control the movement of the insertion rod 204.

[0023] In addition, a rubber friction strip 208 is fixedly connected to one side of the limiting block 205. The limiting block 205 contacts the inner wall of the trapezoidal through groove of the limiting slide rail 202 through the friction strip 208. The rubber friction strip 208 can effectively increase the friction between the limiting block 205 and the limiting slide rail 202, further improve the limiting stability, and prevent the slider 203 from sliding in the non-operational state. Example

[0024] Please see Figure 1 - Figure 8This embodiment provides another structurally sound, compact, integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet. The specific concept is as follows: A compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinet includes a cabinet body 1 and a cabinet door 101. The compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinet also includes a second mounting bracket 3 and a second limiting member.

[0025] The second mounting bracket 3 is movably connected to the inner side of the top of the cabinet 1, and the second limiting member is set inside the cabinet 1. The second limiting member is used to adjust the lateral position of the second mounting bracket 3 inside the cabinet 1.

[0026] As examples, in this embodiment, the second limiting member includes a limiting plate 301 and a slot 302.

[0027] The cabinet 1 has a limiting plate 301 fixedly connected to the inner top of its top surface. One end of the limiting plate 301 has evenly spaced slots 302 on its inner side, providing a positioning base for the subsequent limiting structure. A sliding sleeve 303 is slidably connected to the outer side of the limiting plate 301. The sliding sleeve 303 can move flexibly along the axial direction of the limiting plate 301, and a second mounting bracket 3 is fixedly connected to one side to support and drive the synchronous displacement of related components.

[0028] Meanwhile, a sleeve head 304 is fixedly connected to the outer side of one end of the sliding sleeve 303. The sleeve head 304 is fitted onto the outer side of the limiting plate 301, serving as an auxiliary positioning and protective function. Push plates 305 are slidably connected to the inner sides of both ends of the sleeve head 304. A limiting block 306 is fixedly connected to one side of the push plate 305. The limiting block 306 can be precisely inserted into the slot 302, thereby achieving stable limiting of the sleeve head 304 and the sliding sleeve 303 and preventing accidental displacement.

[0029] In addition, a second spring 307 is fixedly installed on the outer side of one end of the push plate 305. The outer side of the end of the second spring 307 away from the limiting block 205 is fixedly connected to the inner side of the middle part of the sleeve 304, which can provide elastic restoring force for the push plate 305 and the limiting block 306, ensuring flexible switching of the limiting structure. In addition, a handle 308 is fixedly connected to one side of the sliding sleeve 303, which makes it convenient for the operator to manually push the sliding sleeve 303 to adjust its position, improving the ease of operation.

[0030] Working principle: This integrated incoming PT cabinet, by integrating four mounting boxes 102 into a single cabinet 1, not only greatly saves the space of the power distribution room, but also reduces the number of outer shells and some internal structural components of the cabinet 1 through the integrated design, thereby reducing the amount of board material and raw material consumption, effectively controlling manufacturing costs and responding to the needs of a low-carbon economy. At the same time, it eliminates the interface problems and additional fault points caused by parallel cabinets, simplifies the operation and maintenance process, and improves operation and maintenance efficiency and system security. When the user needs to arrange the structure on one side of the cabinet door 101, the user can press the two push plates 305, which will cause the limit plug 306 to slide out from the inside of the slot 302, and at the same time compress the second spring 307. At this time, the limit plug 306 loses its limiting function on the sleeve head 304, and then the user can adjust the position of the sliding sleeve 303 and the second mounting bracket 3 on its upper surface through the handle 308, thereby adjusting the position of the second mounting bracket 3. The position of the fixed electronic components is adjusted by pressing the button 209. The button 209 moves the rod 204 towards the inside of the slider 203, thereby disengaging the limiting ball 206 from one end of the limiting block 205. Simultaneously, the button 209 is compressed, reducing the pressure on the inside of the limiting slide rail 202 by the limiting block 205 and the friction strip 208. The user can then slide the slider 203 on the inside of the limiting slide rail 202, moving the first mounting bracket 2 on the upper surface of the slider 203. Once the slider is in the correct position, the user can release the button 209, releasing the elastic potential energy of the first spring 207 and pushing the rod 204 outward. The limiting ball 206 then limits the limiting block 205 again, and the friction strip 208 limits the slider 203 again, allowing for quick adjustment of the position of the first mounting bracket 2.

[0031] This compact, integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet boasts four major advantages: space saving, cost control, optimized operation and maintenance, and flexible layout, making it highly practical and economical. By integrating four mounting boxes 102 into a single cabinet 1, it significantly saves space in the distribution room, reduces the amount of outer shell and some structural components required for one cabinet 1, lowers raw material consumption and manufacturing costs, and eliminates interface problems and additional fault points caused by parallel cabinets, thereby improving system safety and operation and maintenance efficiency. It also supports dual flexible adjustment: pressing the push plate 305 adjusts the position of the second mounting bracket 3, and pressing the button 209 slides to adjust the layout of the first mounting bracket 2. This allows for quick adaptation to different installation requirements of electronic components without complex operations, making it suitable for the compact and multifunctional use scenarios of ring main units.

[0032] The mounting box 102 has multiple heat dissipation holes on one side, and ensures that there is sufficient insulation clearance between each phase of the charged body and to ground to meet the insulation strength requirements.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinets, comprising a cabinet body (1), characterized in that: Also includes: Cabinet door (101) is rotatably connected to the outer side of the top of the cabinet body (1), and the cabinet door (101) fits against the outer side of the top opening of the cabinet body (1); Mounting boxes (102) are located on the inner side of the bottom end of the cabinet (1), and each mounting box (102) is equipped with a voltage transformer on its inner side. The first mounting bracket (2) is movably mounted on the inner side of the top of the cabinet (1); The first limiting member is disposed inside the cabinet (1), and the limiting member is used to limit the position of the first mounting bracket (2); The second mounting bracket (3) is movably connected to the inner side of the top of the cabinet (1); The second limiting member is disposed inside the cabinet (1) and is used to adjust the lateral position of the second mounting bracket (3) inside the cabinet (1).

2. The compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet according to claim 1, characterized in that: The first limiting member includes: Mounting arm (201) is fixedly connected to the inner side of the top of the cabinet (1); A limiting slide rail (202) is fixedly connected to the upper surface of the mounting arm (201), and a trapezoidal through groove is provided on one side of the limiting slide rail (202); The slider (203) is slidably connected to the inner side of the limiting slide rail (202), and the bottom end of the first mounting bracket (2) is fixedly connected to one side of the slider (203); The limiting block (205) is movably disposed on the inner side of both ends of the slider (203). An inclined structure is provided on the outer side of one end of the limiting block (205). The inclined structure at the end of the limiting block (205) is in contact with the inner wall surface of the trapezoidal through groove on the inner side of the limiting slide rail (202).

3. The compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet according to claim 2, characterized in that: The first limiting member also includes: The insert rod (204) is movably disposed inside the slider (203); A limiting ball (206) is fixedly connected to the outside of the insert rod (204). The limiting ball (206) has a spherical structure, and the outside of the limiting ball (206) is in fixed contact with one side of the limiting block (205). The first spring (207) is fixedly connected to the outer side of the end of the insertion rod (204), and the outer side of the end of the first spring (207) away from the limiting ball (206) is fixedly connected to the inner side of one end of the slider (203).

4. A compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet according to claim 3, characterized in that: A button (209) is fixedly connected to the outer side of the end of the insertion rod (204) away from the first spring (207), and the button (209) is made of silicone.

5. A compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet according to claim 2, characterized in that: A friction strip (208) is fixedly connected to one side of the limiting block (205). The friction strip (208) is made of rubber. The limiting block (205) contacts the inner wall of the trapezoidal groove of the limiting slide rail (202) through the friction strip (208).

6. A compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinets according to claim 2, characterized in that: The second limiting member includes: Limiting plate (301) is fixedly connected to the inner side of the top of the cabinet (1); The slots (302) are evenly distributed on the inner side of one end of the limiting plate (301); The sliding sleeve (303) is slidably connected to the outside of the limiting plate (301). The sliding sleeve (303) moves along the axial direction of the limiting plate (301). The second mounting bracket (3) is fixedly connected to one side of the sliding sleeve (303). A sleeve (304) is fixedly connected to the outer side of one end of the sliding sleeve (303), and the sleeve (304) is sleeved on the outer side of the limiting plate (301); The push plate (305) is slidably connected to the inner sides of both ends of the sleeve (304); The limiting plug (306) is fixedly connected to one side of the push plate (305). The limiting plug (306) is inserted into the slot (302) to limit the sleeve (304).

7. A compact integrated 10kV ring main unit with four voltage transformers for the incoming PT cabinet according to claim 6, characterized in that: The second limiting member also includes: The second spring (307) is fixedly disposed on the outer side of one end of the push plate (305), and the outer side of the end of the second spring (307) away from the limiting block (205) is fixedly connected to the inner side of the middle part of the sleeve (304).

8. A compact integrated 10kV ring main unit with four voltage transformers for incoming PT cabinets according to claim 6, characterized in that: A handle (308) is fixedly connected to one side of the sliding sleeve (303).

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