An inflatable cabinet

Abstract

This utility model provides a gas-insulated switchgear, including a switchgear housing, a circuit-breaking linkage mechanism, a contact assembly, and a grounding protection system. The switchgear housing is filled with insulating gas. The circuit-breaking linkage mechanism is driven by closing and opening springs to achieve rapid closing and opening actions. The trip unit, under the electromagnetic force of the closing and opening coils, controls the trip lever, driving the drive shaft to rotate, causing the contact plates to contact or separate from the linkage contact plates, thereby achieving circuit on / off control. The grounding switch latch provides reliable grounding protection through the grounding port, ensuring safety during equipment maintenance or failure. The support frame and isolation plate optimize the internal structural layout, and the cable management holes facilitate cable management. The overall structure features high reliability, safety, and ease of operation, suitable for switch control and protection needs in high-voltage electrical environments. Its dual-spring drive, electromagnetic trip control, and grounding protection functions significantly improve operating efficiency and service life.

Description

Technical Field

[0001] This utility model relates to the field of gas-filled cabinets, and more specifically, to a gas-filled cabinet. Background Technology

[0002] Gas-insulated switchgear, as an indispensable and important piece of equipment in power systems, is widely used in substations and distribution stations of various voltage levels, undertaking key functions of circuit control, protection, and switching. With the continuous development of power systems, higher requirements are being placed on the performance, safety, and reliability of gas-insulated switchgear.

[0003] However, existing gas-insulated switchgear has many shortcomings in practical applications. Regarding closing and opening operations, some traditional gas-insulated switchgear uses a drive method with a slow response speed, making it difficult to complete circuit switching quickly. When faced with circuit faults or normal operational needs, it cannot respond promptly and reliably, which not only affects the stability of the power system but may also lead to the expansion of the fault range, posing a potential threat to the safety of electrical equipment and personnel.

[0004] Regarding the tripping protection mechanism, the existing gas-insulated switchgear trip unit's coordination with other components is not precise enough, resulting in poor accuracy and stability of closing and opening actions. When a circuit abnormality occurs, the trip unit cannot respond quickly and disconnect the circuit in time, thus failing to effectively prevent the further deterioration of the fault.

[0005] The contact assembly also has structural defects. Some gas-insulated switchgear has inflexible contact action and poor contact performance, resulting in high contact resistance, increased energy loss, and reduced power transmission efficiency.

[0006] In terms of safety protection, the wiring ports of traditional gas-insulated switchgear lack effective protective measures, posing a high risk of personnel accidentally touching live parts and easily causing electric shock accidents. Moreover, the wiring ports are susceptible to the effects of moisture and dust in the external environment, thus shortening the service life of the equipment.

[0007] Regarding internal wiring, existing gas-insulated switchgear lacks a reasonable wiring guidance structure, resulting in a chaotic cable and wire arrangement. This not only increases the difficulty of installation and maintenance but also easily causes mutual interference between cables, affecting the overall performance of the equipment. Furthermore, the existing internal support structure of the gas-insulated switchgear is not stable enough, reducing the reliability and stability of the equipment.

[0008] In summary, existing gas-insulated switchgear technology can no longer meet the demands of modern power systems for high performance, high safety, and high reliability, and urgently needs improvement. Therefore, we propose a gas-insulated switchgear. Utility Model Content

[0009] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: an inflatable cabinet, including an inflatable cabinet shell, a wiring port provided on the inflatable cabinet shell, a circuit breaking linkage mechanism provided inside the inflatable cabinet shell, the circuit breaking linkage mechanism being connected to a conductive cable socket cable wire, and the circuit breaking linkage mechanism being linked to a contact assembly.

[0010] As a preferred technical solution of this utility model, the circuit breaking linkage mechanism is provided with a closing spring and a opening spring, the closing spring and the opening spring are connected to the drive shaft, a cam is installed on the drive shaft, and a trip unit is provided above the cam.

[0011] As a preferred technical solution of this utility model, the trip unit is electrically connected to the opening and closing coil, the trip unit cooperates with the latch rod, the latch rod is connected to the crank arm, and the crank arm is linked with the drive shaft.

[0012] As a preferred technical solution of this utility model, the contact assembly is provided with an insulating pull rod and an electric contact piece, the electric contact piece is connected to the rotating shaft, and the electric contact piece is linked to the linkage contact piece.

[0013] As a preferred technical solution of this utility model, the interior of the gas cabinet shell is provided with a shielding inner cover, the gas cabinet shell is provided with a comb hole, and the interior of the gas cabinet shell is provided with a support frame.

[0014] As a preferred technical solution of this utility model, a grounding switch latch is provided at the bottom of the gas-filled cabinet shell, and a grounding port is provided at the center of the grounding switch latch.

[0015] As a preferred technical solution of this utility model, grounding switch positioning pins are provided at both ends of the outer side of the grounding switch latch.

[0016] As a preferred technical solution of this utility model, a front panel is provided on the front side of the gas-filled cabinet shell.

[0017] As a preferred technical solution of this utility model, an isolation plate is provided inside the gas-filled cabinet shell.

[0018] As a preferred technical solution of this utility model, an insulating sleeve is provided on the outer surface of the wiring port.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model's circuit breaker linkage mechanism utilizes closing and opening springs to drive the drive shaft, achieving rapid and reliable closing and opening operations. This spring-driven method offers fast response, enabling circuit switching to be completed quickly, effectively addressing circuit faults or normal operational needs, and improving the stability and reliability of the power system.

[0021] The precise coordination between the trip unit, the opening and closing coils, the trip lever, and the crank arm components ensures the accuracy and stability of the closing and opening actions. In the event of a circuit malfunction, the trip unit can respond quickly, promptly cutting off the circuit to prevent the fault from escalating and ensuring the safety of equipment and personnel.

[0022] This utility model's contact assembly employs an insulated pull rod and a contact piece structure, achieving circuit connection and disconnection through the linkage of the contact pieces. This structure makes the contact piece movement more flexible, ensures good contact, reduces contact resistance, lowers energy loss, and improves power transmission efficiency.

[0023] The insulating sleeve on the outer surface of the wiring port of this invention effectively prevents accidental contact with live parts and avoids electric shock accidents. At the same time, the insulating sleeve also provides moisture and dust protection, protecting the wiring port from external environmental influences and extending the service life of the equipment.

[0024] The grounding switch latch and grounding port of this invention provide reliable grounding protection for the equipment. In the open state, the equipment can be grounded by operating the grounding switch latch, releasing residual charge within the equipment and ensuring the safety of maintenance personnel. The grounding switch positioning pin ensures the accuracy of the grounding switch position and improves the reliability of grounding.

[0025] The cable management holes on the gas-insulated cabinet shell of this invention facilitate the organization and guidance of cables and wires, resulting in neater and more orderly internal wiring. The support frame inside the shell provides stable support for the internal electrical components, ensuring the positional stability of each part. During equipment operation, the support frame effectively resists vibration and external forces, preventing component displacement or damage, thus improving the reliability and stability of the equipment.

[0026] The front panel design of this invention facilitates the operation and observation of the equipment by the operator. Operators can intuitively understand the equipment's operating status and perform corresponding operations through the windows or buttons on the front panel, thus improving work efficiency.

[0027] The insulating plate installed inside the gas-insulated cabinet of this invention separates different electrical areas, preventing mutual interference and short circuits between electrical components. This isolation structure improves the safety and reliability of the equipment and reduces the probability of malfunctions. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0030] Figure 3 This is a partial structural schematic diagram of the present invention;

[0031] Figure 4 This is a partial structural diagram of the contact pad provided by this utility model;

[0032] Figure 5 This is a partial structural diagram of the comb hole provided by this utility model.

[0033] The image shows:

[0034] 1. Gas-filled switchgear housing; 101. Front panel; 2. Wiring port; 3. Closing spring; 4. Opening spring; 5. Drive shaft; 6. Cam; 7. Trip unit; 8. Opening and closing coils; 9. Crank arm; 10. Buckle; 11. Conductive cable socket; 12. Insulating pull rod; 13. Contact piece; 131. Rotating shaft; 14. Linkage contact piece; 15. Shielding inner cover; 16. Comb hole; 17. Support frame; 18. Grounding switch latch; 181. Grounding port; 19. Grounding switch positioning pin; 20. Isolation plate; 21. Insulating box sleeve. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0036] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] Example 1: An inflatable switchgear includes a switchgear housing 1, a wiring port 2 on the switchgear housing 1, and a circuit breaker linkage mechanism inside the switchgear housing 1. The circuit breaker linkage mechanism is connected to a conductive cable socket 11 and a contact assembly. The circuit breaker linkage mechanism includes a closing spring 3 and a opening spring 4, which are connected to a drive shaft 5. A cam 6 is mounted on the drive shaft 5, and a trip unit 7 is located above the cam 6. The trip unit 7 is electrically connected to a closing / opening coil 8, and cooperates with a latch 10. The latch 10 is connected to a crank arm 9, and the crank arm 9 is linked to the drive shaft 5.

[0038] The contact assembly includes an insulating pull rod 12 and an electric contact piece 13. The electric contact piece 13 is connected to the rotating shaft 131 and is linked to the linkage contact piece 14. The gas-insulated cabinet housing 1 has an inner shielding cover 15 inside, a comb hole 16 on its surface, and a support frame 17 inside. A grounding switch latch 18 is located at the bottom of the gas-insulated cabinet housing 1, with a grounding port 181 at its center.

[0039] Grounding switch locking pins 19 are provided at both ends of the outer side of the grounding switch latch 18. A front panel 101 is provided on the front side of the gas-filled cabinet housing 1. An isolation plate 20 is provided inside the gas-filled cabinet housing 1. An insulating sleeve 21 is provided on the outer surface of the wiring port 2.

[0040] Gas-insulated switchgear is mainly used to realize the on-off control of circuits and grounding protection functions. Its core function lies in the coordinated action of the circuit breaking linkage mechanism and the contact assembly to realize the closing and opening operations of the circuit. At the same time, each component also has the function of ensuring safe and stable operation.

[0041] Working principle of the gas-insulated switchgear: Closing process: When closing is required, the opening and closing coils 8 are energized, sending a signal to the trip unit 7. The energy stored in the closing spring 3 begins to be released, driving the drive shaft 5 to rotate. The closing spring 3 is connected to the drive shaft 5, and its elastic potential energy is converted into the rotational kinetic energy of the drive shaft 5.

[0042] When the drive shaft 5 rotates, the cam 6 mounted on it rotates accordingly. At this time, the trip unit 7 is in normal condition, allowing the trip lever 10 to perform corresponding actions under its action.

[0043] The latch 10 is connected to the crank arm 9. The rotation of the drive shaft 5 is transmitted to the latch 10 through the crank arm 9, so that the latch 10 is in the appropriate position, ensuring the smooth operation of the closing operation.

[0044] The rotation of the drive shaft 5 drives the insulating pull rod 12 to move through the linkage structure. The insulating pull rod 12 pushes the contact piece 13 to rotate around the rotating shaft 131, so that the contact piece 13 contacts the linkage contact piece 14, thereby realizing the circuit conduction and completing the closing operation.

[0045] Tripping process: When a circuit fault occurs or tripping is required, the tripping coil 8 is energized, sending a tripping signal to the trip unit 7. The trip unit 7 then activates, releasing the restriction on the trip lever 10.

[0046] The opening spring 4 releases energy, driving the drive shaft 5 to rotate in the opposite direction. Similar to the closing spring 3, the opening spring 4 is also connected to the drive shaft 5, and its elastic potential energy is converted into the kinetic energy of the drive shaft 5 rotating in the opposite direction.

[0047] The reverse rotation of the drive shaft 5 drives the insulating pull rod 12 to move in the opposite direction through the linkage structure. The insulating pull rod 12 pulls the contact piece 13 to rotate in the opposite direction around the rotating shaft 131, so that the contact piece 13 is separated from the linkage contact piece 14, thereby cutting off the circuit and completing the circuit breaker opening operation.

[0048] Wiring port 2 is used to connect external cables and wires. The insulating sleeve 21 is installed on the outer surface of wiring port 2 to prevent personnel from accidentally touching live parts, and at the same time, it plays a role in insulation and protection, improving the safety of use. The shielding cover 15 inside the gas-insulated cabinet shell 1 can shield the electromagnetic interference generated by the internal electrical components, reduce the impact on the surrounding environment and other equipment, and at the same time prevent the external electromagnetic interference from affecting the internal components of the gas-insulated cabinet, ensuring the stable operation of the equipment.

[0049] The comb hole 16 on the gas-insulated cabinet shell 1 is used to organize and guide the cables and wires, making the internal wiring more neat and orderly, facilitating installation, maintenance and management, and also helping to reduce mutual interference between cables.

[0050] The support frame 17 is installed inside the gas-insulated cabinet shell 1 to support and fix the internal electrical components, ensure the stability of the position of each component, and prevent the components from shifting or being damaged due to vibration or external force.

[0051] The grounding switch latch 18 is located at the bottom of the gas-insulated cabinet housing 1, and its central grounding port 181 is used to connect the grounding wire. In the open state, the equipment can be grounded by operating the grounding switch latch 18 to release residual charge within the equipment and ensure the safety of maintenance personnel. Grounding switch positioning pins 19 are located at both ends of the outer side of the grounding switch latch 18 to accurately fix the position of the grounding switch and ensure the reliability of the grounding operation.

[0052] The front panel 101 is located on the front side of the gas chamber housing 1, serving to protect the internal components and facilitate operation and observation. Operators can monitor and operate the gas chamber through the window or operation buttons on the front panel.

[0053] The isolation plate 20 installed inside the gas-insulated cabinet shell 1 is used to separate different electrical areas, prevent mutual interference and short circuits between electrical components, and improve the safety and reliability of the equipment. The circuit breaker linkage mechanism is connected to the cable through the conductive cable socket 11 to realize the electrical connection with the external circuit, enabling the circuit breaker linkage mechanism to control the on / off state of the circuit.

[0054] Example 2: A gas-filled switchgear, during the closing process, when the operator issues a closing command, the opening and closing coil 8 is energized, generating electromagnetic force to drive the trip unit 7 to operate, so that it is in a state that allows closing.

[0055] Spring energy release: The closing spring 3 releases its stored elastic potential energy, driving the drive shaft 5 to rotate clockwise. The cam 6 on the drive shaft 5 rotates accordingly, pushing the latch 10 to move. The latch 10 drives the crank arm 9 to move, and the crank arm 9 further enhances the rotation effect of the drive shaft 5.

[0056] The rotation of the drive shaft 5 drives the insulating rod 12 forward through the internal transmission structure. The insulating rod 12 pushes the contact piece 13 to rotate clockwise around the rotating shaft 131, so that the contact piece 13 and the linkage contact piece 14 make close contact, thereby realizing the circuit conduction and completing the closing operation. At this time, the external power supply delivers electrical energy to the load through the wiring port 2, the conductive cable socket 11 and the contact piece assembly.

[0057] During equipment operation, the inner shield 15 shields against electromagnetic interference generated by electrical components, reducing the impact on the surrounding environment and other equipment; the support frame 17 provides stable support for the internal components, ensuring the stability of the equipment structure. The cable management holes 16 organize and guide cables and wires, avoiding mutual interference and safety hazards caused by tangled cables.

[0058] The insulating box 21 outside the wiring port 2 prevents personnel from accidentally touching live parts, and at the same time provides insulation protection to ensure the safety of operators.

[0059] Tripping Process: Fault Detection or Command Issuance: When an overload or short-circuit fault occurs in the circuit, or when the operator issues a tripping command, the tripping coil 8 is energized, sending a tripping signal to the trip unit 7. The trip unit 7 then activates, releasing the restriction on the trip lever 10.

[0060] The tripping spring 4 releases its elastic potential energy, driving the drive shaft 5 to rotate counterclockwise. The counterclockwise rotation of the drive shaft 5 drives the insulating pull rod 12 to move backward through the transmission structure. The insulating pull rod 12 pulls the contact piece 13 to rotate counterclockwise around the rotating shaft 131, causing the contact piece 13 to separate from the linkage contact piece 14, cutting off the circuit and completing the tripping operation.

[0061] Before performing grounding operations, it must be confirmed that the equipment is in the open state and the circuit is disconnected. The operator operates the grounding switch latch 18 and connects it to the grounding port 181 to ground the equipment. The grounding switch positioning pin 19 ensures the accurate position of the grounding switch and guarantees the reliability of the grounding. Through the grounding operation, residual charge in the equipment is released, providing safety assurance for equipment inspection and maintenance.

[0062] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. An inflatable cabinet, comprising an inflatable cabinet shell (1), characterized in that, The gas cabinet housing (1) is provided with a wiring port (2). The gas cabinet housing (1) is provided with a circuit breaking linkage mechanism. The circuit breaking linkage mechanism is connected to the cable wire of the conductive cable socket (11). The circuit breaking linkage mechanism is linked to the contact assembly. The circuit breaking linkage mechanism is provided with a closing spring (3) and a opening spring (4). The closing spring (3) and the opening spring (4) are connected to the drive shaft (5). A cam (6) is installed on the drive shaft (5). A trip unit (7) is provided above the cam (6). The trip unit (7) is electrically connected to the opening and closing coil (8). The trip unit (7) cooperates with the latch (10). The latch (10) is connected to the crank arm (9). The crank arm (9) is linked to the drive shaft (5).

2. The gas-filled cabinet according to claim 1, characterized in that, The contact assembly is provided with an insulating pull rod (12) and an electric contact piece (13). The electric contact piece (13) is connected to the rotating shaft (131), and the electric contact piece (13) is linked to the linkage contact piece (14).

3. The gas-filled cabinet according to claim 2, characterized in that, The gas cabinet housing (1) is provided with a shielding inner cover (15), the gas cabinet housing (1) is provided with a comb hole (16), and the gas cabinet housing (1) is provided with a support frame (17).

4. The gas-filled cabinet according to claim 3, characterized in that, A grounding switch latch (18) is provided at the bottom of the gas-filled cabinet shell (1), and a grounding port (181) is provided at the center of the grounding switch latch (18).

5. The gas-insulated cabinet according to claim 4, characterized in that, The grounding switch latch (18) is provided with grounding switch positioning pins (19) at both ends of its outer side.

6. The gas-filled cabinet according to claim 5, characterized in that, The front panel (101) is provided on the front side of the gas-filled cabinet shell (1).

7. The gas-insulated cabinet according to claim 6, characterized in that, An isolation plate (20) is provided inside the gas-filled cabinet shell (1).

8. The gas-filled cabinet according to claim 7, characterized in that, An insulating sleeve (21) is provided on the outer surface of the wiring port (2).

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