A visual grounding switch operation structure for a medium-voltage switch cabinet in a steel plant without a handle

Abstract

This invention belongs to the field of high-voltage switchgear technology and discloses a hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants. It includes a push-pull rod fixedly mounted inside the switchgear, with a limit frame fixedly installed at the bottom of one end of the push-pull rod. The inside of the limit frame is slidably connected to one end of a flip arm, and the other end of the flip arm is drively connected to the rotating shaft of the grounding switch body. When the push-pull rod slides back and forth, the limit frame drives the flip arm to flip, thereby driving the rotating shaft to rotate, realizing the closing or opening of the grounding switch. This invention addresses the problem that existing grounding switch operations rely on a dedicated hand crank and the status is not visible. Through a transmission mechanism that combines the push-pull rod, the limit frame, and the flip arm, a push-pull operation replaces the traditional rotary hand crank operation, eliminating the need for additional special tools. Simultaneously, the extended or retracted position of the push-pull rod visually reflects the closing or opening status of the grounding switch, improving operational convenience and safety.

Description

Technical Field

[0001] This invention belongs to the technical field of high voltage switchgear, specifically relating to a hand-crank-free visual grounding switch operation structure for medium voltage switchgear in steel plants. Background Technology

[0002] Steel production is a process industry, with continuous operations in processes such as ironmaking, steelmaking, and rolling, requiring extremely high power supply reliability. The KYN28 high-voltage switchgear is a core piece of equipment in the medium-voltage power distribution system of steel plants, possessing industry-standard "five-proof" safety functions; the grounding switch, as its key safety component, forms a ground discharge circuit by connecting the equipment under maintenance to the ground, thus ensuring the personal safety of maintenance personnel.

[0003] Currently, the mainstream operating method for grounding switches in high-voltage switchgear is "external crank operation." Taking the KYN28 switchgear as an example, the operator needs to hold a special crank and insert it into the external interface of the cabinet. By rotating the crank, the internal rotating rod is driven to rotate, thereby realizing the closing and opening operation of the grounding switch. Some companies are also exploring improved solutions such as electric operating mechanisms, but from the perspective of the industry as a whole, manual crank operation is still the mainstream operating method for the grounding switches in the vast majority of medium-voltage switchgear.

[0004] However, the aforementioned crank-driven operation method still has significant shortcomings in practical applications. On the one hand, this operation method relies on a dedicated crank. If the crank is lost, damaged, or the operator forgets to bring it, the grounding switch will be unable to operate, delaying maintenance work. For steel companies, maintenance delays may further lead to unplanned downtime, causing huge economic losses. On the other hand, the crank rotation operation lacks external visual status indicators—the rotation angle of the crank cannot be intuitively judged from outside the cabinet, making it difficult for operators to confirm the closed or open status of the grounding switch, easily leading to misoperation and thus threatening the personal safety of maintenance personnel. Summary of the Invention

[0005] The purpose of this invention is to provide a hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants. It uses a transmission mechanism consisting of a push-pull rod, a limit frame, and a flip arm to replace the traditional rotary hand crank operation with a push-pull operation, eliminating the need for additional special tools. At the same time, the extension or retraction position of the push-pull rod visually reflects the closed or open status of the grounding switch, improving operational convenience and safety.

[0006] The present invention adopts the following technical solution: A hand-free visual grounding switch operation structure for medium-voltage switchgear in steel plants includes a push-pull rod fixedly assembled inside the switchgear. A limit frame is fixedly installed at the bottom of one end of the push-pull rod. The inside of the limit frame is slidably connected to one end of a flip arm, and the other end of the flip arm is drively connected to the rotating shaft of the grounding switch body. When the push-pull rod slides back and forth, it drives the flip arm to flip through the limit frame, which in turn drives the rotating shaft to rotate, thereby realizing the closing or opening of the grounding switch.

[0007] The beneficial effects of this invention are as follows: This invention adopts a transmission structure that combines a push-pull rod, a limit frame, and a flipping arm. The push-pull rod and the flipping arm transmit motion through the limit frame. By reciprocating push-pull, the rotating shaft can be driven to rotate, realizing the closing and opening operations of the grounding switch. There is no need to carry a special crank, avoiding operation delays caused by the loss or forgetting of the crank. The push-pull operation is simple, time-saving, and labor-saving. At the same time, the extension or retraction position of the push-pull rod can intuitively reflect the closing or opening status of the grounding switch. The operator can accurately judge the switch status from outside the cabinet, avoiding the risk of misoperation caused by unclear status identification, and effectively improving the convenience and safety of operation. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the switch cabinet structure in this invention; Figure 3 This is a schematic diagram of the assembly of the present invention in a switch cabinet; In the diagram: 1. Switchgear, 11. High-voltage switchgear body, 12. Storage slot, 13. Equipment room, 14. Installation room, 15. Maintenance door, 2. Operating mechanism, 21. Push-pull rod, 22. Sliding sleeve, 23. Handle, 24. Fixing sleeve, 25. Limiting bracket, 26. Flip arm, 3. Grounding switch mechanism, 31. Grounding switch body, 32. Rotating shaft, 33. Knife switch. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] like Figure 1 , Figure 2 and Figure 3As shown, this invention provides a crank-free, visually-oriented grounding switch operating structure for medium-voltage switchgear in steel plants, which is installed inside the switchgear 1. The switchgear 1 includes a high-voltage switchgear body 11, with an equipment chamber 13 and an installation chamber 14 respectively inside. The equipment chamber 13 is used to install supporting electrical equipment, and the installation chamber 14 is used to install the grounding switch body 31 and the operating mechanism 2. A storage slot 12 is provided at the front end of the high-voltage switchgear body 11, and a maintenance door 15 corresponding to the installation chamber 14 is hinged to the rear end of the high-voltage switchgear body 11. The grounding switch body 31 is fixedly installed on the inner wall of the installation chamber 14. A switch 33 is rotatably mounted on the grounding switch body 31 via a rotating shaft 32. When the rotating shaft 32 rotates, it can drive the switch 33 to contact or separate from the grounding switch body 31, realizing closing or opening the circuit. The operating mechanism 2 of this invention is assembled inside the installation chamber 14 and is used to drive the rotating shaft 32 to rotate.

[0011] In one embodiment, such as Figure 1 As shown, a hand-crankless visual grounding switch operation structure for medium-voltage switchgear in steel plants is provided. It includes a push-pull rod 21 fixedly assembled in the switchgear 1. A limit frame 25 is fixedly installed at the bottom of one end of the push-pull rod 21. The interior of the limit frame 25 is slidably connected to one end of a flip arm 26. The other end of the flip arm 26 is drivenly connected to the rotating shaft 32 of the grounding switch body 31. When the push-pull rod 21 slides back and forth, it drives the flip arm 26 to flip through the limit frame 25, thereby driving the rotating shaft 32 to rotate, realizing the closing or opening of the grounding switch.

[0012] Specifically, the push-pull rod 21 is slidably installed on the inner wall of the mounting chamber 14 of the high-voltage switchgear body 11, with one end extending out of the cabinet body for the operator to push and pull.

[0013] The limit bracket 25 is fixed to the bottom of the push-pull rod 21 near the switch body 31 and moves synchronously with the push-pull rod 21.

[0014] One end of the flip arm 26 is slidably installed inside the limit frame 25, and the other end is connected to the rotating shaft 32 of the grounding switch body 31.

[0015] When the push-pull rod 21 slides back and forth, the limit frame 25 drives the flip arm 26 to slide within the limit frame 25, causing the flip arm 26 to flip from a horizontal state to a vertical state or from a vertical state back to a horizontal state, thereby driving the rotating shaft 32 to rotate forward or reverse, realizing the closing or opening of the switch knife 33 and the grounding switch body 31.

[0016] With the aforementioned push-pull transmission structure, operators do not need to carry additional special tools such as cranks. They can complete the closing and opening of the grounding switch simply by pushing and pulling, effectively avoiding operational delays caused by forgetting or losing tools and simplifying the operation process.

[0017] In another embodiment, the tilting arm 26 is connected to the rotating shaft 32 by a snap-fit ​​mechanism.

[0018] Specifically, one end of the tilting arm 26 is provided with a bayonet, and one end of the rotating shaft 32 is provided with a clamp head that matches the bayonet. The tilting arm 26 and the rotating shaft 32 are connected by the bayonet and the clamp head to achieve a transmission connection.

[0019] This snap-fit ​​method is simple to assemble and can be completed without the need for additional tools, facilitating disassembly and assembly during on-site assembly and maintenance. When the tilting arm 26 tilts, the snap-fit ​​mechanism drives the snap-fit ​​head to rotate synchronously, thereby driving the rotating shaft 32 to rotate.

[0020] In another embodiment, a handle 23 is fixedly mounted on the other end of the push-pull rod 21.

[0021] Specifically, the handle 23 is located at one end of the push-pull rod 21 extending out of the high-voltage switchgear body 11. The operator can perform push-pull operations by holding the handle 23, which saves effort. The handle 23 also serves as a limit stop at the operating end, preventing the push-pull rod 21 from being pushed excessively into the cabinet.

[0022] In another embodiment, such as Figure 2 As shown, the switch cabinet 1 has a storage slot 12 corresponding to the handle 23. When the switch is closed, the handle 23 extends out of the storage slot 12, and when the switch is open, the handle 23 retracts into the storage slot 12.

[0023] Specifically, the front end of the high-voltage switchgear body 11 is provided with a storage slot 12, the size of which is adapted to the handle 23. When the push-pull rod 21 is pulled out to close the circuit, the handle 23 extends out of the storage slot 12 simultaneously, and the operator can see the handle 23 in the extended state from outside the cabinet, thus determining that the grounding switch is in the closed state; when the push-pull rod 21 is pushed in to open the circuit, the handle 23 retracts into the storage slot 12 simultaneously to hide the circuit, and the operator can see the handle 23 in the retracted and hidden state from outside the cabinet, thus determining that the grounding switch is in the open state.

[0024] With the cooperation of handle 23 and storage slot 12, the operator can accurately identify the switching status of the grounding switch body from the outside by visual inspection without the need for any instruments or indicators, effectively avoiding the risk of misoperation caused by unclear status identification.

[0025] In another embodiment, the push-pull rod 21 is slidably mounted inside the switch cabinet 1 via a sliding sleeve 22.

[0026] Specifically, the sliding sleeve 22 is fixedly installed on the inner wall of the installation chamber 14, and the push-pull rod 21 passes through the sliding sleeve 22 and can slide horizontally along its inner wall.

[0027] The sliding sleeve 22 supports and guides the sliding of the push-pull rod 21, reduces the friction when the push-pull rod 21 slides, ensures the stability and smoothness of the horizontal sliding of the push-pull rod 21, and avoids operational difficulties caused by the push-pull rod 21 being misaligned or stuck.

[0028] In another embodiment, the push-pull rod 21 is fixedly installed with the limit frame 25 by a fixing sleeve 24.

[0029] Specifically, the fixing sleeve 24 is fitted onto the bottom of the push-pull rod 21, and the limiting frame 25 is fixedly connected to the push-pull rod 21 through the fixing sleeve 24.

[0030] The fixed sleeve 24 ensures the rigidity of the connection between the limit frame 25 and the push-pull rod 21, so that the push-pull rod 21 can move synchronously to drive the limit frame 25 to move, thus ensuring the accuracy and reliability of the transmission.

[0031] In another embodiment, the tilting arm 26 tilts 90° as the push-pull rod 21 slides. When the tilting arm 26 is in a vertical state, it drives the rotating shaft 32 to rotate to achieve closing the gate, and when it is in a horizontal state, it achieves opening the gate.

[0032] Specifically, when the push-pull rod 21 is pulled outward from the high-voltage switchgear body 11, the limit frame 25 moves synchronously, causing the flip arm 26 to slide upward and flip 90° within the limit frame 25 to a vertical state. The flipping of the flip arm 26 causes the rotating shaft 32 to rotate synchronously by 90°, thereby causing the switch 33 to contact the grounding switch body 31 to achieve closing. When the push-pull rod 21 is pushed inward from the high-voltage switchgear body 11, the limit frame 25 moves synchronously in the opposite direction, causing the flip arm 26 to flip downward by 90° to return to a horizontal state. The rotating shaft 32 rotates synchronously in the opposite direction by 90°, causing the switch 33 to separate from the grounding switch body 31 to achieve opening.

[0033] By cooperating with the limit frame 25 and the flip arm 26, the horizontal reciprocating motion of the push-pull rod 21 is transformed into the 90° rotational motion of the rotating shaft 32, thus realizing the change of operation mode.

[0034] In another embodiment, the limiting frame 25 has a guide groove inside for the tilting arm 26 to slide.

[0035] Specifically, the guide groove is provided along the length of the limiting frame 25, and the flipping arm 26 is slidably installed in the guide groove. The guide groove limits and guides the sliding of the flipping arm 26. When the push-pull rod 21 drives the limiting frame 25 to move horizontally, the flipping arm 26 slides along a specific trajectory under the constraint of the guide groove. The wall of the guide groove guides the flipping arm 26 to flip from a horizontal state to a vertical state or from a vertical state back to a horizontal state, ensuring that the flipping process of the flipping arm 26 is smooth and reliable, and preventing the flipping arm 26 from deviating or coming off during the movement.

[0036] In another embodiment, the sliding direction of the push-pull rod 21 is perpendicular to the axis of the rotating shaft 32.

[0037] Specifically, the push-pull rod 21 slides reciprocally in the horizontal direction, and the rotating shaft 32 is arranged along a horizontal axis perpendicular to the sliding direction of the push-pull rod 21. The sliding direction of the push-pull rod 21 is perpendicular to the axis of the rotating shaft 32. The horizontal reciprocating motion of the push-pull rod 21 drives the rotating shaft 32 to rotate around its own axis through the conversion of the limiting frame 25 and the flipping arm 26. This motion conversion method has a compact structure, high transmission efficiency, and can reliably convert linear motion into rotational motion.

[0038] The working process of this invention will be described below.

[0039] During the grounding switch closing operation, the operator holds handle 23 and pulls push-pull rod 21 outwards towards the high-voltage switchgear body 11. Push-pull rod 21 slides horizontally outwards along sliding sleeve 22, driving limit frame 25 to move outwards synchronously via fixed sleeve 24. Limit frame 25 drives flip arm 26 to flip 90° upwards from a horizontal position to a vertical position within the guide groove inside limit frame 25. The flipping of flip arm 26 drives the rotating shaft 32, which is engaged with it, to rotate 90° synchronously. The rotating shaft 32 drives the switch knife 33 to rotate until it contacts the grounding switch body 31, thus closing the circuit. At this time, handle 23 extends out of storage slot 12, and the operator can visually confirm from outside the cabinet that the grounding switch is in the closed state.

[0040] During the grounding switch opening operation, the operator holds handle 23 and pushes push-pull rod 21 into the high-voltage switchgear body 11. Push-pull rod 21 slides horizontally inward along sliding sleeve 22, driving limit frame 25 to move inward synchronously through fixed sleeve 24. Limit frame 25 drives flip arm 26 to flip 90° downward from a vertical position in the guide groove inside limit frame 25 to return to a horizontal position. The flipping of flip arm 26 drives rotating shaft 32 to rotate 90° in the opposite direction synchronously. Rotating shaft 32 drives knife switch 33 to rotate until it separates from grounding switch body 31, realizing the opening. At this time, handle 23 retracts into storage groove 12 and is hidden. The operator can visually confirm from the outside of the cabinet that the grounding switch is in the open state.

[0041] When the grounding switch needs to be inspected and maintained, the operator can open the maintenance door 15 at the rear of the high-voltage switchgear body 11 to expose the installation chamber 14, which allows for convenient inspection and maintenance of the grounding switch body 31 and the operating mechanism 2.

[0042] In summary, this invention utilizes a transmission structure consisting of a push-pull rod 21, a limit frame 25, and a flip arm 26 to replace the traditional rotary crank operation with a push-pull operation. This eliminates the need to carry special tools and avoids operational delays caused by forgetting or losing tools. Furthermore, the extended or retracted position of the handle 23 at the end of the push-pull rod 21 allows operators to visually identify the closed or open status of the grounding switch from outside the cabinet, effectively improving operational convenience and safety.

Claims

1. A structure for visualizing the operation of a shake-free grounding switch of a medium voltage switchgear in a steel plant, characterized in that, Includes a push-pull rod (21) fixedly assembled in the switch cabinet (1), a limit frame (25) is fixedly installed at the bottom of one end of the push-pull rod (21), the interior of the limit frame (25) is slidably connected to one end of the flip arm (26), and the other end of the flip arm (26) is connected to the rotating shaft (32) of the grounding switch body (31) through transmission. When the push-pull rod (21) slides back and forth, it drives the flip arm (26) to flip through the limit frame (25), thereby driving the rotating shaft (32) to rotate, so as to realize the closing or opening of the grounding switch.

2. A visualized grounding switch operating structure for a medium voltage switchgear in a steel plant without a handle according to claim 1, characterized in that, The flipping arm (26) and the rotating shaft (32) are connected by a snap-fit ​​mechanism.

3. A visualized grounding switch operating structure for a medium voltage switchgear in a steel plant without a handle according to claim 1, characterized in that, A handle (23) is fixedly installed at the other end of the push-pull rod (21).

4. The hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants according to claim 3, characterized in that, The switch cabinet (1) is provided with a storage slot (12) corresponding to the handle (23). When the switch is closed, the handle (23) extends out of the storage slot (12), and when the switch is open, the handle (23) retracts into the storage slot (12).

5. The hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants according to claim 4, characterized in that, The push-pull rod (21) is slidably assembled inside the switch cabinet (1) via a sliding sleeve (22).

6. The hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants according to claim 5, characterized in that, The push-pull rod (21) and the limit frame (25) are fixedly installed by a fixing sleeve (24).

7. The hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants according to claim 6, characterized in that, The flip arm (26) flips 90° as the push-pull rod (21) slides. When the flip arm (26) is in a vertical state, it drives the rotating shaft (32) to rotate to achieve closing the gate. When it is in a horizontal state, it achieves opening the gate.

8. The hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants according to claim 7, characterized in that, The limiting frame (25) has a guide groove inside for the sliding of the flipping arm (26).

9. The hand-crank-free visual grounding switch operation structure for medium-voltage switchgear in steel plants according to claim 8, characterized in that, The sliding direction of the push-pull rod (21) is perpendicular to the axis of the rotating shaft (32).

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