Miniaturized integrated switchgear

Abstract

The application relates to the technical field of switch cabinets, and discloses a miniaturized integrated switch cabinet which comprises a cabinet body, a placing groove is formed in the cabinet body, a circuit breaker is arranged in the placing groove, a containing groove is formed in the cabinet body, a sensor and a mutual inductor are arranged in the containing groove, the sensor, the mutual inductor and the circuit breaker are electrically connected in sequence, a through hole is formed in the placing groove and communicates with the containing groove, a contact port is arranged on the outgoing line side of the circuit breaker, the contact port passes through the through hole and is located in the containing groove, and the contact port, the mutual inductor and the sensor are integrally poured by an insulating pouring material to form a fixed shell. The three functionally independent elements of the sensor, the mutual inductor and the contact port of the circuit breaker are integrally poured by the insulating pouring material to form a modularized fixed shell, traditional independent connection structures (such as the mounting frame, the bolt and the wire in the background art) between the elements are eliminated, and the integration degree of the elements is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of switchgear, and in particular to a miniaturized integrated switchgear. Background Technology

[0002] Switchgear is a key piece of equipment in power systems used for power generation, transmission, distribution, and energy conversion. It mainly realizes the opening, closing, control, and protection of lines. To monitor the operating status, switchgear is usually equipped with vacuum circuit breakers and voltage sensors. The voltage sensors are used to collect voltage signals and transmit them to the display. At the same time, the cabinet is also equipped with current transformers to convert the high voltage of the main circuit into a low voltage signal for safe and accurate collection by the voltage sensors.

[0003] In related technologies, switch cabinets include cabinets, inside which vacuum circuit breakers and sensors are installed. The outgoing side of the vacuum circuit breaker is provided with contact ports. The cabinet is also provided with current transformers, which are used to connect the sensors and contact ports. The cabinet is provided with mounting brackets, which are fixedly connected to the cabinet by bolts. The current transformers are mounted on the mounting brackets.

[0004] The mounting bracket, as an independent component, occupies the already limited space inside the cabinet, reducing the space utilization rate of the cabinet. The additional mounting bracket increases the number of parts and assembly processes, which is not conducive to the miniaturization design of the switch cabinet, and also restricts the integrated layout of components inside the cabinet, resulting in an overall structure that is not compact enough, which in turn affects the manufacturing cost and ease of maintenance of the equipment. Summary of the Invention

[0005] To increase space utilization during transformer installation, this application provides a miniaturized integrated switch cabinet.

[0006] This application provides a miniaturized integrated switchgear, which adopts the following technical solution: A miniaturized integrated switch cabinet includes a cabinet body with a placement slot inside the cabinet body. A circuit breaker is placed in the placement slot. A receiving slot is also provided inside the cabinet body, with a sensor and a current transformer placed in the receiving slot. The sensor, current transformer, and circuit breaker are electrically connected in sequence. A through hole is provided on the placement slot to connect to the receiving slot. A contact port is provided on the outgoing side of the circuit breaker. The contact port passes through the through hole and is located in the receiving slot. The contact port, current transformer, and sensor are integrally cast into a fixed shell using insulating casting material.

[0007] By adopting the above technical solution, the three functionally independent components—sensor, transformer, and circuit breaker contact points—are integrally cast into a modular "fixed shell" using insulating casting material. This eliminates the traditional, space-consuming independent connection structures between them (such as mounting brackets, bolts, and wires in the prior art), greatly improving the integration of components. The integrally cast fixed shell directly serves as a structural component, replacing the independent mounting bracket through the integral molding of the contact points and transformer. This frees up space previously occupied by the mounting bracket, making the internal structure of the cabinet more compact and providing a structural basis for miniaturized switchgear design. The integrally cast insulating material tightly wraps all electrical connection points between the contact points, transformer, and sensor, forming a seamless, integral insulator. This not only provides robust mechanical support but also completely eliminates the risk of insulation failure caused by loose connections, oxidation, or external contamination and moisture erosion, significantly improving the system's insulation strength and long-term operational reliability.

[0008] Optionally, the fixing shell is provided with a fixing strip, and the cabinet body is provided with a fixing hole for inserting the fixing strip; when the fixing strip is inserted into the fixing hole, the fixing shell is installed in the cabinet body.

[0009] By adopting the above technical solution, a simple plug-in installation structure is formed by setting "fixing strips" on the fixed shell and opening corresponding "fixing holes" on the cabinet. During installation, simply align the fixing strips and insert them into the fixing holes to complete the initial positioning and pre-fixation of the fixed shell, making the operation simple and quick. The plug-in structure ensures a high degree of consistency in positional accuracy for each installation, avoiding installation deviations that may occur due to differences in worker operation when using traditional methods such as bolts. At the same time, the modular fixed shell has good interchangeability, facilitating later maintenance and replacement.

[0010] Optionally, the cabinet is provided with a support frame, the support frame has a mounting hole for the contact port to pass through, and the support frame is provided with a support bar, the support bar abutting against the fixed shell.

[0011] By adopting the above technical solution, the support frame abuts against the fixed shell from one side through its "support bars," forming a multi-point, multi-directional support and fixation structure with the fixing bars of the fixed shell itself from the other side. This "clamping"-like fixing method is far more stable than a simple plug-in connection, effectively resisting vibrations and impacts generated during equipment operation or transportation, and preventing displacement or loosening of the fixed shell. The "mounting holes" opened on the support frame allow the contact port to pass through, providing a second positioning point for the contact port in addition to the fixed shell abutting against the hole wall, ensuring the positional accuracy and coaxiality of the contact port in the hole, and avoiding the risk of poor plugging due to cantilever or skew.

[0012] Optionally, the current transformer is provided with a heat dissipation frame, which protrudes from the fixed shell during the casting process and abuts against the heat-generating position of the current transformer.

[0013] By adopting the above technical solution, and by setting up a "heat dissipation frame" that "contacts the position where the current transformer generates heat," and making it "protrude from the fixed shell" during casting, it is equivalent to embedding a dedicated heat conduction channel in the integrally cast insulation module. Heat can be directly and efficiently conducted from the heat source (current transformer) to the air outside the fixed shell through the highly thermally conductive frame, solving the problem of poor thermal conductivity of insulation casting materials and the tendency for internal heat to accumulate.

[0014] Optionally, the support bar has a flow groove that extends through the support frame. The inner diameter of the flow groove gradually decreases along the direction from the placement groove to the receiving groove, and the support bar abuts against the heat dissipation frame.

[0015] By adopting the above technical solution, the "flow groove" opened on the support bar extends through the support frame, and its inner diameter "gradually decreases" along the direction from the placement groove to the receiving groove. This structure, similar to a Venturi tube or chimney, allows the hot air to rise and accelerate outward along the path of gradually decreasing inner diameter after the heat is heated in the groove. This creates negative pressure in the flow groove, drawing in external cold air from the support frame and forming a continuous and efficient directional air convection that quickly removes the heat dissipation frame. The support bar not only provides structural support but also forms part of the efficient heat dissipation system (airflow channel), achieving "multi-purpose functionality" and significantly improving overall heat dissipation performance without occupying much additional space.

[0016] Optionally, the support frame is provided with a baffle, and the baffle and the support bar are located on different sides of the support frame respectively.

[0017] By adopting the above technical solution, when the support frame is subjected to the insertion and extraction force of the contact port or the pressure of the fixed shell, it may undergo displacement or deformation in the direction of the placement groove. The baffle set on the other side can abut against the groove wall of the placement groove, providing rigid reverse support force for the support frame, firmly restricting it in the predetermined position, and ensuring the long-term effectiveness of the double fixing structure.

[0018] Optionally, the baffle is provided with a stop block, the stop block abutting against the side of the fixing strip away from the support frame, and the baffle abutting against the side of the fixing strip away from the fixing shell.

[0019] By adopting the above technical solution, the "stop block" on the baffle abuts against the side of the fixing strip away from the support frame, forming a physical "locking" relationship. Even if the equipment suffers severe vibration, causing the fixing strip to tend to come off away from the fixing hole, the stop block will firmly stop it. At the same time, the baffle abuts against the side of the fixing strip, restricting its lateral movement. This multi-faceted limiting structure completely locks the fixing shell, achieving an extremely high level of anti-loosening; through the tight abutment of the baffle and the stop block, the assembly gap between the fixing strip and the fixing hole, and between the support strip and the fixing shell, is completely eliminated, avoiding fretting wear and noise caused by micro-vibrations during equipment operation.

[0020] Optionally, the fixing strip is provided with a dovetail block, which is located in the placement groove.

[0021] By adopting the above technical solution, the "dovetail block" on the fixing strip is located on one side of the placement groove. When the equipment is subjected to vibration or external force during operation, causing the fixing strip to tend to come out away from the fixing hole, the dovetail block structure, with its gradually increasing width (or thickness), will physically interfere with the groove wall, acting like a barb to firmly "lock" the fixing strip to the cabinet partition. This fundamentally eliminates the possibility of the fixing strip being accidentally pulled out of the perforation, achieving extremely high mechanical connection reliability.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By integrating the three functionally independent components—sensors, instrument transformers, and circuit breaker contacts—into a modular "fixed shell" using insulating casting material, the traditional, space-consuming independent connection structures (such as mounting brackets, bolts, and wires in the prior art) are eliminated, significantly improving component integration. The integrally cast fixed shell directly serves as a structural component, replacing independent mounting brackets through the integrated molding of the contacts and instrument transformers. This frees up space previously occupied by mounting brackets, resulting in a more compact internal cabinet structure and providing a structural basis for miniaturized switchgear design. The integrally cast insulating material tightly wraps all electrical connection points between the contacts, instrument transformers, and sensors, forming a seamless, integral insulator. This not only provides robust mechanical support but also completely eliminates the risk of insulation failures caused by loose connections, oxidation, or external contamination and moisture erosion, significantly improving system insulation strength and long-term operational reliability.

[0023] The "flow channels" on the support bars extend through the support frame, and their inner diameter gradually decreases from the placement channel to the receiving channel. This structure, similar to a Venturi tube or chimney, allows the hot air to rise and accelerate outward along the path of the gradually decreasing inner diameter after being heated by heat. This creates negative pressure within the flow channels, drawing in cool air from the support frame and forming a continuous and efficient directional air convection that quickly removes the heat dissipation from the heat dissipation frame. The support bars serve both a structural support function and constitute part of the efficient heat dissipation system (airflow channel), achieving "multi-purpose functionality" and significantly improving overall heat dissipation performance without occupying much additional space. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application; Figure 2 This is a cross-sectional view highlighting the placement slot in Embodiment 1 of this application; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this application; Figure 5 This is a cross-sectional view highlighting the placement slot in Embodiment 2 of this application; Figure 6 This is a schematic diagram of the support frame structure in Embodiment 2 of this application; Figure 7 yes Figure 5 Enlarged diagram of part B.

[0025] Reference numerals: 1. Cabinet; 11. Placement slot; 12. Receiving slot; 13. Perforation; 2. Circuit breaker; 21. Current transformer; 22. Sensor; 23. Heat dissipation frame; 231. Insertion strip; 3. Fixing shell; 31. Fixing strip; 32. Fixing hole; 33. Dovetail block; 4. Support frame; 41. Mounting hole; 42. Support strip; 421. Flow channel; 43. Insertion hole; 44. Baffle; 441. Stop block. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail. Example 1

[0027] This embodiment discloses a miniaturized integrated switch cabinet. (Refer to...) Figure 1 and Figure 2 A miniaturized integrated switch cabinet includes a cabinet body 1. The cabinet body 1 has a placement slot 11 and a receiving slot 12. The wall of the placement slot 11 has a through hole 13, which connects to the receiving slot 12 and extends through to the side of the cabinet body 1 where the receiving slot 12 is located.

[0028] Reference Figure 2 A circuit breaker 2, a vacuum circuit breaker, is installed in the placement slot 11, with its contact port located on the outgoing side. A current transformer 21 and a sensor 22 are installed in the receiving slot 12. The current transformer 21, the contact port of the circuit breaker 2, and the sensor 22 are integrally cast into a fixed shell 3 using epoxy resin as the insulating casting material. The operator directly places the circuit breaker 2 into the placement slot 11, with the fixed shell 3, current transformer 21, and sensor 22 simultaneously positioned within the receiving slot 12, the fixed shell 3 abutting against the wall of the through hole 13.

[0029] Reference Figure 3 Two fixing strips 31 are integrally formed on the side of the fixing shell 3, and two fixing holes 32 are opened on the groove wall of the receiving groove 12 for the fixing strips 31 to be inserted. The through hole 13 is located between the two fixing holes 32.

[0030] The implementation principle of Example 1 is as follows: the operator directly places the circuit breaker 2 into the placement slot 11, and then the operator pushes the fixed shell 3 to move, so that the fixing strip 31 is inserted into the corresponding fixing hole 32. The fixed shell 3 is supported by the wall of the through hole 13 and the contact opening. Example 2

[0031] Reference Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that the current transformer 21 is provided with a heat dissipation frame 23, which is made of aluminum alloy and abuts against the heat-generating part of the current transformer 21. When the contact port, current transformer 21, sensor 22 and heat dissipation frame 23 are cast together, the heat dissipation frame 23 protrudes from the fixing shell 3 so that the heat dissipation frame 23 can quickly transfer the heat in the current transformer 21 out of the fixing shell 3.

[0032] Reference Figure 6 The cabinet 1 is provided with a support frame 4. The surface of the support frame 4 is provided with a mounting hole 41 for the contact port to pass through. The support frame 4 is integrally formed with a support strip 42, which abuts against the outer wall of the fixed shell 3. The support strip 42 is L-shaped.

[0033] Reference Figure 6 and Figure 7 A flow groove 421 is provided on the support bar 42, and the flow groove 421 extends through to the side of the support frame 4. The inner diameter of the flow groove 421 gradually decreases along the direction from the support bar 42 to the support frame 4.

[0034] Reference Figure 7The support bar 42 has an insertion hole 43, and the heat dissipation frame 23 has an integrally formed insertion strip 231. The insertion strip 231 is used to insert into the insertion hole 43 so that the heat dissipation frame 23 abuts against the support bar 42. The air in the flow groove 421 can be blown towards the heat dissipation frame 23 to enhance the air flow at the heat dissipation frame 23.

[0035] Reference Figure 6 and Figure 7 The support frame 4 has two baffles 44 integrally formed on it, and the two baffles 44 are located on different sides of the contact opening. The baffles 44 and the support bar 42 are located on different sides of the support frame 4, the support bar 42 is located in the receiving groove 12, and the baffles 44 are located in the placement groove 11.

[0036] Reference Figure 7 A dovetail block 33 is fixedly connected to the fixing strip 31, and the dovetail block 33 has elastic deformation capability. When the fixing strip 31 is inserted into the fixing hole 32, the dovetail block 33 can be located in the placement groove 11. A stop block 441 is integrally formed on the baffle 44, and the stop block 441 abuts against the groove wall of the placement groove 11. The stop block 441 can abut against the side of the dovetail block 33 away from the contact opening, so that the stop block 441 can restrict the movement of the dovetail block 33 towards the receiving groove 12, so that the dovetail block 33 can be stably located in the placement groove 11.

[0037] The implementation principle of Example 2 is as follows: First, the operator places the circuit breaker 2, the current transformer 21, the fixed shell 3 and the sensor 22 inside the cabinet 1. Then, the operator installs the support frame 4 in the through hole 13 so that the contact port can be located in the mounting hole 41 of the support frame 4. After that, the operator pushes the current transformer 21 so that the plug 231 can be inserted into the plug hole 43, so that the heat dissipation frame 23 and the support bar 42 can be relatively fixed.

[0038] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A miniaturized integrated switch cabinet, comprising a cabinet (1), characterized in that: The cabinet (1) has a placement slot (11) inside, and a circuit breaker (2) is installed in the placement slot (11). The cabinet (1) also has a receiving slot (12) inside, and a sensor (22) and a current transformer (21) are installed in the receiving slot (12). The sensor (22), the current transformer (21), and the circuit breaker (2) are electrically connected in sequence. The placement slot (11) has a through hole (13) that connects to the receiving slot (12). The circuit breaker (2) has a contact port on its outgoing side. The contact port passes through the through hole (13) and is located in the receiving slot (12). The contact port, the current transformer (21), and the sensor (22) are integrally cast with insulating casting material to form a fixed shell (3).

2. The miniaturized integrated switchgear according to claim 1, characterized in that: The fixed shell (3) is provided with a fixing strip (31), and the cabinet (1) is provided with a fixing hole (32) for inserting the fixing strip (31); when the fixing strip (31) is inserted into the fixing hole (32), the fixed shell (3) is installed in the cabinet (1).

3. The miniaturized integrated switchgear according to claim 2, characterized in that: The cabinet (1) is provided with a support frame (4), the support frame (4) is provided with an installation hole (41) for the contact port to pass through, the support frame (4) is provided with a support bar (42), and the support bar (42) abuts against the fixed shell (3).

4. A miniaturized integrated switchgear according to claim 3, characterized in that: The current transformer (21) is provided with a heat dissipation frame (23). When the fixed shell (3) is cast, the heat dissipation frame (23) protrudes from the fixed shell (3) and the heat dissipation frame (23) abuts against the position where the current transformer (21) generates heat.

5. A miniaturized integrated switchgear according to claim 4, characterized in that: The support bar (42) has a flow groove (421) that extends through the support frame (4). The inner diameter of the flow groove (421) gradually decreases along the direction from the placement groove (11) to the receiving groove (12). The support bar (42) abuts against the heat dissipation frame (23).

6. A miniaturized integrated switchgear according to claim 3, characterized in that: The support frame (4) is provided with a baffle (44), and the baffle (44) and the support bar (42) are located on different sides of the support frame (4).

7. A miniaturized integrated switchgear according to claim 6, characterized in that: The baffle (44) is provided with a stop block (441), the stop block (441) abuts against the side of the fixing strip (31) away from the support frame (4), and the baffle (44) abuts against the side of the fixing strip (31) away from the fixing shell (3).

8. A miniaturized integrated switchgear according to claim 3, characterized in that: The fixing strip (31) is provided with a dovetail block (33), which is located in the placement groove (11).

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