Electric operation tool for low-voltage chamber cabinet door of 6KV switch cabinet of nuclear power plant

Abstract

The utility model relates to the technical field of switch cabinets in nuclear power plants, aims to solve the mechanical fault problems of cabinet door sinking, deformation and the like caused by misoperation of personnel, and discloses an electric operation tool for a low-voltage chamber cabinet door of a 6KV switch cabinet in a nuclear power plant. Comprising a driving assembly, a torque output interface, a boss interface, a connecting piece, a double-wing inner groove output interface and a forward and reverse rotation switching button, the torque output interface is arranged at the end of the driving assembly, the boss interface is arranged at one end of the connecting piece, the double-wing inner groove output interface is arranged at the other end of the connecting piece, and the torque output interface is connected with the boss interface; the positive and negative rotation switching button is arranged on the outer surface of the driving assembly. According to the utility model, the failure rate of the low-voltage chamber cabinet door of the 6KV switch cabinet is effectively reduced by 50%, unnecessary operation time is reduced by 40%, operation and maintenance time is greatly saved, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant switchgear technology, and in particular to an electric operating tool for the door of the low-voltage compartment of a 6KV switchgear in a nuclear power plant. Background Technology

[0002] Currently, the 6KV switchgear used in nuclear power plants consists of a busbar compartment, a circuit breaker compartment, a cable compartment, and a low-voltage compartment. The low-voltage compartment and its door house the secondary components of the switchgear, including relay protection components, instruments, analog busbars, operating switches, and other secondary equipment with special requirements.

[0003] When operators perform circuit breaker operations or wiring checks in the low-voltage compartment, they need to open the low-voltage compartment cabinet doors. These doors are operated by a standardized double-winged key. The key is inserted into the lock hole and rotated to open or close the door. Each low-voltage compartment cabinet door has three lock holes arranged vertically at intervals; all three lock holes must be open before the door can be opened. In actual operation, the three lock holes are positioned relatively high, with the lowest being approximately 1.75m. When closing and locking the door, due to the small gripping area behind the double-winged key and the limited rotational force surface, it often happens that some lock holes, while manually tightened, are not actually fully closed or are stuck in the middle position. This is especially problematic during major and minor overhauls, when one or more sections of the 6kV busbar are being repaired or decommissioned, requiring the operation of many low-voltage compartments, which easily leads to some low-voltage compartment cabinet door lock holes not being properly locked.

[0004] The following risks to equipment and personnel exist if the lock hole is not locked: Firstly, it will cause uneven force on the low-voltage compartment door, which may cause the door to sink, the hinges to loosen and wear, and even the pin inside the lock hole to become crooked, resulting in damage to the door. Secondly, it will cause the low-voltage compartment to be incompletely closed and sealed. If an electrical cabinet malfunction occurs, such as the arc flash protection tripping, the low-voltage compartment door may not be able to perform its mechanical functions and may pop out directly, causing injury. Utility Model Content

[0005] The purpose of this utility model is to provide an electric operating tool for the low-pressure compartment door of a 6KV switchgear in a nuclear power plant, which solves the mechanical failure problems such as door sinking and deformation caused by improper operation by personnel, effectively reduces the failure rate of the low-pressure compartment door of the 6KV switchgear by 50%, and reduces unnecessary operation time by 40%, greatly saving operation and maintenance time and improving production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An electric operating tool for the low-pressure compartment door of a 6KV switchgear in a nuclear power plant includes a drive assembly, a torque output interface, a boss interface, a connector, a double-winged recessed output interface, and a forward / reverse switching button. The torque output interface is located at one end of the drive assembly, the boss interface is located at one end of the connector, and the double-winged recessed output interface is located at the other end. The torque output interface is connected to the boss interface, and the forward / reverse switching button is located on the outer surface of the drive assembly.

[0008] In some embodiments, the boss interface, the connector, and the double-wing inner groove output interface are integral cast iron parts.

[0009] In some embodiments, a transition section is provided between the boss interface and the connector.

[0010] In some embodiments, the ends of the connector and the double-winged inner groove output interface are flush.

[0011] In some embodiments, the outer surface of the double-winged inner groove output interface is provided with two protrusions arranged at 180°.

[0012] In some embodiments, the protrusion is a cuboid structure.

[0013] In some embodiments, the torque output interface is an internal hexagonal groove torque output interface, the boss interface is a hexagonal boss interface, and the internal hexagonal groove torque output interface and the hexagonal boss interface are connected through a hexagonal groove.

[0014] In some embodiments, the torque output interface is connected to a reducer within the drive assembly.

[0015] In some embodiments, the length of the connector is 3.4 to 3.6 cm.

[0016] In some embodiments, the drive assembly contains two 5V batteries.

[0017] Compared with the prior art, the electric operating tool for the low-pressure compartment door of the 6KV switchgear in nuclear power plants provided by this utility model has the following advantages:

[0018] This invention effectively ensures the cabinet door is locked when operating the 6KV low-voltage cabinet, preventing the door from sinking or deforming, ensuring the cabinet remains functional during service, saving labor costs, and improving operational efficiency.

[0019] This invention greatly reduces the possibility of cabinet doors sinking or deforming due to improper operation by on-site personnel, thereby reducing the maintenance costs of the power plant; it uses power tools to replace manual operation, saving related labor costs; and it shortens the maintenance period during the overhaul of the nuclear power plant, improving the economic efficiency of the power plant. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the technical description will be briefly introduced below.

[0021] Figure 1 A schematic diagram of the structure of an electric operating tool for the low-pressure compartment door of a 6KV switchgear in a nuclear power plant, provided as an embodiment of this utility model;

[0022] Figure 2 A front view of the one-piece cast iron part provided for an embodiment of this utility model;

[0023] Figure 3 Left view of the one-piece cast iron part provided for an embodiment of this utility model;

[0024] Figure 4 A top view of the integrated cast iron double-wing inner groove output interface provided in this embodiment of the utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Drive assembly; 2. Torque output interface 2; 3. Boss interface; 4. Connector; 5. Double-wing inner groove output interface; 6. Forward / reverse switching button; 7. Transition section. Detailed Implementation

[0027] The following detailed description provides further details on specific implementation methods.

[0028] like Figures 1 to 4 As shown in the figure, this application embodiment provides an electric operating tool for the low-pressure room cabinet door of a 6KV switchgear in a nuclear power plant, including a drive assembly 1, a torque output interface 2, a boss interface 3, a connector 4, a double-wing inner groove output interface 5, and a forward / reverse switching button 6.

[0029] The drive assembly 1 contains two 5V batteries, and the drive assembly 1 and torque output interface 2 are integrated into one unit. The torque output interface 2 is connected to the boss interface 3, transmitting the power of the drive assembly 1 to the boss interface 3 through the torque output interface 2.

[0030] The drive assembly 1 contains two replaceable 5V batteries, and the forward / reverse switching button 6 is located on the outer surface of the drive assembly 1. When the forward / reverse switching button 6 on the outer panel is in the middle position, the drive assembly 1 is in a power-off and stopped state. Pushing the forward / reverse switching button 6 forward will make the motor rotate forward, and pushing the forward / reverse switching button 6 back will make the motor rotate in reverse. The torque of the drive assembly 1 is the same as that of the lock hole of the low-voltage compartment door of the 6KV switchgear.

[0031] The boss interface 3, connector 4, and double-winged recessed output interface 5 are integrated cast iron parts. The double-winged recessed output interface 5 is inserted into the door interface of the low-voltage compartment of the 6KV switchgear. The forward / reverse switching button 6 drives the integrated cast iron part to rotate forward / reverse, thereby locking and opening the cabinet door. The outer surface of the double-winged recessed output interface 5 has two 180° protrusions, which are cuboid in shape.

[0032] The connector 4 is a cylindrical structure, and the double-winged inner groove output interface 5 is located at the end of the connector 4.

[0033] Optionally, the drive component 1 is a handheld drive component, designed to be easy for the human hand to grip.

[0034] Optionally, the torque output interface 2 is an internal hexagonal groove torque output interface, and the boss interface 3 is a hexagonal boss interface. The internal hexagonal groove torque output interface and the hexagonal boss interface are compatible and are detachably connected through the hexagonal groove.

[0035] Optionally, connector 4 is an extended connector. The length of connector 4 is 3.4 to 3.6 cm.

[0036] like Figure 2 and Figure 3 As shown, the one-piece cast iron part consists of a boss interface 3, a connector 4, and a double-winged inner groove output interface 5. The boss interface 3 and the connector 4 are connected by a gradually expanding casting, which ensures that the extended connector will not come into contact with the torque output interface 2 during driving. Preferably, the boss interface 3 is a hexagonal boss interface, and the connector 4 is an extended connector.

[0037] Optionally, a transition section 7 is provided between the boss interface 3 and the connector 4. The outer surface of the transition section 7 is curved, and the transition section 7 is a rotating structure, such as... Figure 2 and Figure 3 As shown. The ends of the double-winged inner groove output interface 5 and the connector 4 are flush.

[0038] Specifically, one end of the torque output interface 2 is connected to the reducer inside the drive assembly 1, and the other end is connected to the boss interface 3, which enables the drive assembly 1 to drive the integrated cast iron part to rotate in both directions.

[0039] The double-winged inner groove output interface 5 of the one-piece cast iron part is vertically inserted into the lock hole of the low-voltage room cabinet door of the 6KV switchgear in the nuclear power plant. The depth of the central groove of the double-winged inner groove output interface 5 is 0.8 to 1.0 cm, and the groove hole diameter is 0.6 to 0.7 cm, which is consistent with the protrusion height of the lock hole of the low-voltage room cabinet door of the 6KV switchgear. It is confirmed that the rotation opening and closing is based on the maximum force surface.

[0040] The other electronic components used in the drive assembly 1 of this utility model are conventional electronic components of the prior art, which can realize electric control and drive the integrated cast iron part to rotate forward / reverse through the forward / reverse switching button 6.

[0041] In use, the protrusion interface 3 of the integrated cast iron part is connected to the torque output interface 2. The output interface 5 of the double-wing inner groove of the integrated cast iron part is inserted into the door interface of the low-voltage room of the 6KV switchgear. The forward / reverse switching button 6 is used to drive the integrated cast iron part to rotate forward / reverse, thereby locking and opening the cabinet door.

[0042] The design scheme of this utility model for an integrated cast iron part includes the following steps:

[0043] Step 1: Conduct a feasibility and necessity analysis of power-operated tools;

[0044] Step 2: Measure the specific dimensions of the current electric operating handle and manual tools;

[0045] Step 3: Draw the CAD model of the electric operating tool;

[0046] Step 4: Machining the solid iron body using CAD blueprints;

[0047] Step 5: Optimize after actual operation.

[0048] Step 2 specifically includes: measuring the depth / diameter of the interface at the electric operating handle using tools such as vernier calipers, and measuring the relevant dimensional parameters of the existing matching ABB hand tools.

[0049] Step 3 specifically includes:

[0050] Step 3.1: To meet the two functions of adapting to the electric operating handle and opening the low-pressure chamber cabinet door, design the initial draft of the power tool;

[0051] Step 3.2: Discuss the most ergonomic operating angle and length with the on-site operators, and draw specific drawings using CAD.

[0052] Step 4 specifically includes: machining the cast iron according to the drawings using a machine tool.

[0053] Step 2 specifically includes:

[0054] Step 5.1: Optimize the tool's parameters and reverse navigation based on user feedback from on-site personnel;

[0055] Step 5.2: Reprocess the drawings with optimized parameters and apply them to daily work.

[0056] This utility model optimizes the operating key for the low-voltage compartment door of a 6kV switchgear, avoiding door sagging and deformation that may be caused by improper operation by on-site personnel, while also greatly saving on-site operation time.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant, characterized in that, The device includes a drive assembly (1), a torque output interface (2), a boss interface (3), a connector (4), a double-wing inner groove output interface (5), and a forward / reverse switching button (6). The torque output interface (2) is located at one end of the drive assembly (1), the boss interface (3) is located at one end of the connector (4), and the double-wing inner groove output interface (5) is located at the other end. The torque output interface (2) is connected to the boss interface (3), and the forward / reverse switching button (6) is located on the outer surface of the drive assembly (1).

2. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 1, characterized in that, The boss interface (3), the connector (4), and the double-wing inner groove output interface (5) are all integral cast iron parts.

3. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 2, characterized in that, A transition section (7) is provided between the boss interface (3) and the connector (4).

4. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 2, characterized in that, The ends of the connector (4) and the double-winged inner groove output interface (5) are flush.

5. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 2, characterized in that, The outer surface of the double-winged inner groove output interface (5) is provided with two protrusions arranged at 180°.

6. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 5, characterized in that, The protrusion has a cuboid structure.

7. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 1, characterized in that, The torque output interface (2) is an inner hexagonal groove torque output interface, and the boss interface (3) is a hexagonal boss interface. The inner hexagonal groove torque output interface and the hexagonal boss interface are connected through the hexagonal groove.

8. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 1, characterized in that, The torque output interface (2) is connected to the reducer in the drive assembly (1).

9. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 1, characterized in that, The length of the connector (4) is 3.4 to 3.6 cm.

10. The electric operating tool for the low-voltage compartment door of a 6KV switchgear in a nuclear power plant according to claim 1, characterized in that, The drive assembly (1) contains two 5V batteries.

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