Mechanical anti-misoperation switching ring network cabinet

Abstract

The mechanical anti-misoperation switching ring net cabinet provided by the embodiment of the application relates to the technical field of ring net cabinet auxiliary accessories. The mechanical anti-misoperation switching ring net cabinet comprises a box body, a clamping rail, a mechanical switch and a switch brake. A locking mechanism is arranged below the mechanical switch. The locking mechanism comprises two limiting grooves and an adjusting module. The adjusting module comprises a sleeve, a hollow cylinder and a protection cylinder. A threaded rod is threadedly connected to the sleeve. A locking handle is arranged at the outer end of the threaded rod. The protection cylinder is internally provided with a reinforcing module. The reinforcing module comprises a linkage threaded rod fixedly connected to the threaded rod, a moving piece and a linkage mechanism driven by the moving piece. A rubber piece is arranged at the end of the linkage mechanism. The rubber piece can extend out of the protection cylinder slot hole and abut against the inner wall of the limiting groove. The hollow cylinder is connected to the switch brake through a connecting assembly. Rotating the locking handle can achieve primary locking of the locking handle and the limiting groove. Meanwhile, the rubber piece is driven to extend radially and press the inner wall of the limiting groove to achieve secondary locking. Double locking effectively prevents misoperation.

Description

Technical Field

[0001] This invention relates to the field of auxiliary accessories technology for ring main units, and in particular to a mechanical anti-misoperation ring main unit. Background Technology

[0002] Ring main units (RMUs) are medium-voltage secondary power distribution switchgear that seals primary energized components such as busbars, high-voltage switches, and fuse assemblies within a gas-filled chamber. They offer advantages such as condensation resistance, pollution resistance, and dust protection, and have been widely used in the cable-based upgrades of urban power distribution networks. In accordance with the "five preventions" requirements of the power system—preventing accidental opening and closing of circuit breakers, preventing the opening and closing of disconnecting switches under load, preventing the application of grounding wires while energized, preventing the closing of switches with grounding wires connected, and preventing accidental entry into energized compartments—RMUs require interlocking mechanisms between their various operating parts. Mechanical interlocking is currently the most common implementation method. It achieves sequential locking through mutually restrictive and linked mechanical mechanisms, requiring no keys or other auxiliary tools during operation and automatically unlocking upon correct operation sequence.

[0003] In existing mechanical interlocking devices for ring main units, operators rotate or move the locking handle to engage the locking element in the corresponding position of the limit slot, thereby limiting and locking the operating stroke of the switch. In addition, some mechanical interlocking devices incorporate linkage mechanisms and baffle structures. The sliding of the linkage drives the baffle to rotate, thus blocking or exposing the opening and closing operation holes, achieving forced interlocking. While these locking mechanisms can prevent accidental opening and closing of the switch to some extent, their locking method mainly relies on the mechanical contact between the locking handle and the limit slot. The locking force is transmitted only through localized contact between the handle end and the slot wall. Long-term repeated operation can easily lead to wear at the contact points, resulting in loosening and affecting the reliability of the locking mechanism.

[0004] Therefore, in order to address the above problems, the applicant needs to design a mechanical anti-misoperation ring main unit to solve the problem. Summary of the Invention

[0005] This application provides a mechanical anti-misoperation ring main unit, which solves the problem that the existing mechanical interlocking device of the ring main unit mainly relies on mechanical abutment, and the locking force is only transmitted through the partial contact between the handle end and the groove wall, which easily leads to wear of the contact parts and loosening. It includes a box, and a rail is fixedly installed on the back plate of the box. A mechanical switch is installed on the rail, and a switch is installed on the mechanical switch. A locking mechanism is installed below the mechanical switch, and the locking mechanism is used to lock the switch. The locking mechanism includes two limit grooves, and an adjustment module is slidably installed inside the limit grooves. The adjustment module includes a sleeve, a hollow cylinder and a protective cylinder. A connecting component is installed on the outside of the hollow cylinder and is connected to the switch. An adjusting threaded rod is installed on the inner side of the sleeve, and a locking handle corresponding to the limit groove is installed at one end of the adjusting threaded rod. A reinforcement module is installed inside the protective cylinder, and the reinforcement module is controlled by the adjusting threaded rod to squeeze the inner wall of the limit groove.

[0006] Preferably, the reinforcement module includes a linkage threaded rod fixedly connected to the adjusting threaded rod, and a movable part is threaded on the linkage threaded rod. A limit arm is hinged on the movable part, and a movable arm is hinged to the outside of the limit arm. A fixed shaft is fixedly installed on the movable arm, and a rubber part is rotatably installed on the fixed shaft. The linkage mechanism consisting of the linkage threaded rod, the movable part, the limit arm, and the movable arm converts the rotational motion of the adjusting threaded rod into the radial extension motion of the rubber part, so that the locking force changes from single-point contact to multi-point surface contact, thereby enhancing the locking stability and wear resistance.

[0007] Preferably, the protective cylinder is provided with a slot, and the slot is used for the rubber part to pass through the protective cylinder and abut against the limiting groove. The slot on the protective cylinder provides a precise radial extension channel for the rubber part, ensuring that the rubber part can accurately pass through the protective cylinder and abut against the inner wall of the limiting groove, thus avoiding motion interference.

[0008] Preferably, a fixed plate is provided on the outer side of the linkage threaded rod, and the fixed plate is fixedly connected to the inner wall of the protective cylinder. A connecting block is fixedly provided on the fixed plate, and the connecting block is hinged to the movable arm. The fixed plate and the connecting block provide a stable hinge fulcrum for the movable arm, ensuring the structural stability and operational reliability of the linkage mechanism during the movement process.

[0009] Preferably, the movable component is located between the fixed disk and the closed end of the protective cylinder, the limiting arm is hinged to the inner circumferential surface of the movable component, the movable arm is hinged to the outer circumferential surface of the connecting block, and the limiting arm and the movable arm are hinged to each other, forming a linkage mechanism driven by the movable component to change the radial extension amount, which limits the relative positional relationship of the movable component, the fixed disk, the closed end of the protective cylinder, and each hinge point, so that the linkage mechanism forms a compact radial telescopic structure, effectively improving transmission efficiency and reducing the space occupied.

[0010] Preferably, the connecting assembly includes a connecting plate fixedly connected to the hollow cylinder, and a sliding sleeve is fixedly provided at the end of the connecting plate away from the hollow cylinder. A sliding rod is provided inside the sliding sleeve, and a connecting ring is rotatably provided on the sliding rod and sleeved on the outside of the switch gate. The connecting assembly consisting of the connecting plate, sliding sleeve, sliding rod and connecting ring reliably links the action of the locking mechanism with the switch gate, ensuring that the locking operation corresponds synchronously with the position of the switch gate, and improving the accuracy of interlocking.

[0011] Preferably, a locking ring is provided on the outer side of the sliding sleeve, and the locking ring is threadedly connected to the sliding rod. The locking ring and the sliding rod are threadedly connected to lock and fix the position of the sliding sleeve, preventing the sliding sleeve from axially moving during long-term vibration or operation, and enhancing the long-term working reliability of the connecting assembly.

[0012] Preferably, the outer side of the locking handle is covered with an anti-slip sleeve, and the surface of the anti-slip sleeve is provided with anti-slip texture. Covering the outer side of the locking handle with an anti-slip sleeve with anti-slip texture increases the friction between the hand and the handle during operation, and at the same time increases the locking friction between the locking handle and the limiting groove.

[0013] Preferably, the inner wall of the limiting groove is provided with a wear-resistant liner, and the wear-resistant liner is used to abut against the rubber part. The wear-resistant liner on the inner wall of the limiting groove reduces the wear on the groove wall when the rubber part is in direct contact with the limiting groove, extends the service life of the limiting groove and maintains long-term locking accuracy.

[0014] Preferably, the sleeve, hollow cylinder, and protective cylinder have coincident axes and are fixedly connected in sequence. The adjusting threaded rod passes through the sleeve and extends into the hollow cylinder. The linkage threaded rod passes through the protective cylinder and extends into the hollow cylinder, and is fixedly connected to the adjusting threaded rod. The sleeve, hollow cylinder, and protective cylinder are set to be coaxially fixedly connected, and the adjusting threaded rod and linkage threaded rod are coaxially fixed to ensure that the rotational driving force is efficiently transmitted along the same axis, avoiding jamming or wear caused by eccentric movement.

[0015] The mechanical anti-misoperation ring main unit provided in this embodiment of the invention has the following advantages compared with the prior art: This mechanical anti-misoperation ring main unit provides primary locking through the mechanical abutment between the locking handle and the limit groove. Simultaneously, the adjusting threaded rod drives the linkage threaded rod to rotate, causing the moving part to move axially. Through the linkage mechanism formed by the limit arm and the movable arm, the rubber part extends radially out of the groove of the protective cylinder, forming a tight contact with the wear-resistant liner on the inner wall of the limit groove, thus achieving secondary locking. This dual locking structure transforms the locking force of the traditional single contact point into a multi-point surface contact compression and friction synergy, improving the locking strength and impact resistance. It effectively avoids the locking loosening problem caused by local contact wear in existing technologies, and improves the locking reliability and service life of the ring main unit under long-term repeated operation.

[0016] This mechanical anti-misoperation ring main unit achieves synchronous sliding of the switch and the regulating module within the limit groove during switch operation through the sliding fit and rotational connection of the sliding sleeve, sliding rod, and connecting ring in the connecting components. This ensures that the locking position accurately corresponds to the open or closed state. At the same time, the threaded locking structure of the locking ring on the sliding sleeve and sliding rod effectively prevents axial movement under vibration, ensuring linkage accuracy. The anti-slip sleeve has the dual function of increasing hand friction and increasing locking friction between the locking handle and the limit groove. Combined with the elastic adaptive compensation of wear-resistant pads and rubber parts, the overall operation is convenient and the locking effect is good. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the locking mechanism, housing, and mechanical switch of the device of the present invention; Figure 3 This is a schematic diagram of the connection structure between the locking mechanism and the mechanical switch of the present invention; Figure 4 This is a three-dimensional structural diagram of the locking mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A; Figure 6 This is a three-dimensional structural diagram of the adjustment module of the present invention; Figure 7 This is a three-dimensional structural diagram of the reinforcement module of the present invention.

[0019] icon: 1. Housing; 2. Locking mechanism; 11. Rail; 12. Mechanical switch; 13. Switch gate; 21. Limit groove; 22. Adjustment module; 23. Connecting plate; 24. Sliding sleeve; 25. Sliding rod; 26. Locking ring; 27. Connecting ring; 221. Sleeve; 222. Adjusting threaded rod; 223. Locking handle; 224. Protective cylinder; 225. Groove; 226. Hollow cylinder; 2241. Linkage threaded rod; 2242. Fixed plate; 2243. Connecting block; 2244. Movable arm; 2245. Moving part; 2246. Limiting arm; 2247. Fixed shaft; 2248. Rubber parts. Detailed Implementation

[0020] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] Please refer to Figures 1-7 This invention provides a mechanical anti-misoperation ring main unit, including a housing 1. A rail 11 is fixed to the back panel of the housing 1 by screws. A mechanical switch 12 is mounted on the rail 11. The mechanical switch 12 can be a load switch or a circuit breaker. A switch gate 13, which can be moved up and down, is located on its top. A locking mechanism 2 is located below the mechanical switch 12. The locking mechanism 2 is used to lock the switch gate 13 when it is in the open or closed position to prevent misoperation.

[0022] The locking mechanism 2 is fixedly installed on the back plate of the housing 1 and located directly below the mechanical switch 12. The locking mechanism 2 includes two limiting grooves 21 fixedly set on the back plate. The inner wall of the limiting groove 21 is fixedly provided with a wear-resistant pad. The wear-resistant pad is made of high-hardness stainless steel sheet and is fixed to the inner side wall of the limiting groove 21 by adhesive bonding. It is used to abut against the rubber part 2248 described below, which can effectively reduce the wear on the inner wall of the limiting groove 21 during long-term locking, extend the service life of the limiting groove 21 and maintain long-term locking accuracy.

[0023] An adjustment module 22 is slidably mounted inside the limiting groove 21. The adjustment module 22 can slide up and down along the vertical direction of the limiting groove 21, thereby switching between the open and closed locking positions. The adjustment module 22 includes a sleeve 221, a hollow cylinder 226, and a protective cylinder 224, all three having coincident axes and being fixedly connected in sequence. The hollow cylinder 226 is located between the sleeve 221 and the protective cylinder 224. An internal thread is formed on the inner wall of the sleeve 221, which meshes with the external thread of the adjusting threaded rod 222. A locking handle 223 is fixedly mounted at one end (the outer end) of the adjusting threaded rod 222. The locking handle 223 is located outside the sleeve 221 and corresponds to the opening of the limiting groove 21. The adjusting threaded rod 222 can be rotated within the sleeve 221 by rotating the locking handle 223. The outer side of the locking handle 223 is covered with an anti-slip sleeve. The anti-slip sleeve is made of rubber material injection molding, which increases the friction between the hand and the handle during operation, and at the same time increases the locking friction between the locking handle 223 and the limiting groove 21.

[0024] A reinforcing module is provided on the inner side of the protective cylinder 224. This module, controlled by adjusting the rotation of the threaded rod 222, further compresses the inner wall of the limiting groove 21 while the locking handle 223 contacts the limiting groove 21, achieving a more reliable locking. The reinforcing module includes a linkage threaded rod 2241, which penetrates the protective cylinder 224 and extends into the hollow cylinder 226. Inside the hollow cylinder 226, it is coaxially and fixedly connected to the inner end of the adjusting threaded rod 222 via a coupling, thus enabling the linkage threaded rod 2241 to rotate synchronously with the adjusting threaded rod 222. The linkage threaded rod 2241 has an external thread that meshes with the internal thread of the moving part 2245.

[0025] A fixed disk 2242 is provided on the outer side of the linkage threaded rod 2241. The fixed disk 2242 is disc-shaped, with a through hole in its center for the linkage threaded rod 2241 to pass through. The linkage threaded rod 2241 passes through the through hole with a gap between it and the through hole to ensure that the linkage threaded rod 2241 can rotate freely. The outer edge of the fixed disk 2242 is welded and fixed to the inner wall of the protective cylinder 224. A connecting block 2243 is fixedly provided on the fixed disk 2242. The connecting block 2243 is a block-shaped structure protruding from the surface of the fixed disk 2242, and four are evenly spaced along the circumference of the fixed disk 2242. The moving part 2245 is annular and is located between the fixed disk 2242 and the protective cylinder 224. Limiting arms 2246 are hinged to the inner circumferential surface of the moving part 2245. The limiting arms 2246 are long strip rods, four in number, and one end of each is hinged to the inner circumferential surface of the moving part 2245 by a pin. A movable arm 2244 is hinged to the outer peripheral surface of the connecting block 2243. The movable arm 2244 is a long strip rod, one end of which is hinged to the outer peripheral surface of the connecting block 2243 via a pin. The limiting arm 2246 is hinged to the movable arm 2244, that is, the other end of the limiting arm 2246 and the other end of the movable arm 2244 are hinged together via the same pin, thus forming a linkage mechanism driven by the moving member 2245 to change the radial extension amount.

[0026] A fixed shaft 2247 is fixedly mounted on the movable arm 2244, extending along the width of the movable arm 2244 and protruding from its surface. A rubber component 2248 is rotatably mounted on the fixed shaft 2247, and is rotatably fitted onto it. The rubber component 2248 is made of wear-resistant rubber material and has a certain elastic deformation capacity. The protective cylinder 224 has slots 225 on its wall, which are through holes arranged circumferentially around the protective cylinder 224, with their number and position corresponding to the rubber components 2248. The slots 225 allow the rubber components 2248 to pass through the wall of the protective cylinder 224, enabling them to extend outside the protective cylinder 224 under the drive of the linkage mechanism, thereby contacting the wear-resistant liner on the inner wall of the limiting groove 21.

[0027] A connecting assembly is provided on the outer side of the hollow cylinder 226. The connecting assembly is used to realize the linkage between the locking mechanism 2 and the switch 13. The connecting assembly includes a connecting plate 23. One end of the connecting plate 23 is welded and fixed to the outer wall of the hollow cylinder 226. A sliding sleeve 24 is fixedly provided on the end of the connecting plate 23 away from the hollow cylinder 226. The sliding sleeve 24 has a tubular structure, and a sliding rod 25 is slidably sleeved on its inner side. The sliding rod 25 can slide freely along the axial direction of the sliding sleeve 24. A connecting ring 27 is rotatably provided on the sliding rod 25. The connecting ring 27 is sleeved on the outer side of the switch 13, and the inner diameter of the connecting ring 27 is larger than the outer diameter of the switch 13, so that the connecting ring 27 can rotate freely relative to the switch 13. A locking ring 26 is provided on the outer side of the sliding sleeve 24. The inner side of the locking ring 26 is provided with an internal thread. The outer side of the sliding rod 25 is provided with an external thread section that matches the internal thread. The locking ring 26 and the sliding rod 25 are threadedly connected. When the locking ring 26 is tightened, its end face abuts against the end face of the sliding sleeve 24, thereby locking and fixing the relative position of the sliding sleeve 24 and the sliding rod 25, preventing the sliding sleeve 24 from moving axially along the sliding rod 25 during long-term vibration or operation.

[0028] The specific usage process and working principle are as follows: When the circuit breaker needs to be closed and locked, hold the anti-slip sleeve on the locking handle 223 and rotate the locking handle 223 clockwise. The locking handle 223 drives the adjusting threaded rod 222 to rotate inside the sleeve 221. The rotation of the adjusting threaded rod 222 synchronously drives the linkage threaded rod 2241 to rotate. The rotation of the linkage threaded rod 2241 drives the moving part 2245 to move axially. When the locking handle 223 is tightened, the moving part 2245 moves away from the fixed plate 2242, causing the limit arm 2246 to swing. This pushes the movable arm 2244 to swing outward around its hinge point with the connecting block 2243. The fixed shaft 2247 on the movable arm 2244 drives the rubber part 2248 to extend radially outward, passing through the slot 225 on the protective cylinder 224. Finally, the rubber part 2248 is tightly pressed against the wear-resistant pad on the inner wall of the limit groove 21, thus achieving locking.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mechanical anti-misoperation ring main unit, characterized in that: Includes a housing (1), and a rail (11) is fixedly installed on the back plate of the housing (1). A mechanical switch (12) is installed on the rail (11), and a switch gate (13) is installed on the mechanical switch (12). A locking mechanism (2) is installed below the mechanical switch (12), and the locking mechanism (2) is used to lock the switch gate (13). The locking mechanism (2) includes two limiting grooves (21), and an adjustment module (22) is slidably installed inside the limiting grooves (21). The adjustment module (22) includes a sleeve (2 21) Hollow cylinder (226) and protective cylinder (224). The hollow cylinder (226) is provided with a connecting component on the outside and the connecting component is connected to the switch (13). The sleeve (221) is provided with an adjusting thread rod (222) on the inner thread and a locking handle (223) corresponding to the limiting groove (21) is provided at one end of the adjusting thread rod (222). The protective cylinder (224) is provided with a reinforcing module on the inner side and the reinforcing module is controlled by the adjusting thread rod (222) to squeeze the inner wall of the limiting groove (21).

2. The mechanical anti-misoperation ring main unit according to claim 1, characterized in that: The reinforcement module includes a linkage threaded rod (2241) fixedly connected to the adjusting threaded rod (222), and a movable part (2245) is threaded on the linkage threaded rod (2241). A limit arm (2246) is hinged on the movable part (2245), and a movable arm (2244) is hinged on the outside of the limit arm (2246). A fixed shaft (2247) is fixedly provided on the movable arm (2244), and a rubber part (2248) is rotatably provided on the fixed shaft (2247).

3. A mechanical anti-misoperation ring main unit according to claim 2, characterized in that: The protective cylinder (224) is provided with a groove (225), and the groove (225) is used for the rubber part (2248) to pass through the protective cylinder (224) and abut against the limiting groove (21).

4. A mechanical anti-misoperation ring main unit according to claim 2, characterized in that: A fixed plate (2242) is provided on the outside of the linkage threaded rod (2241), and the fixed plate (2242) is fixedly connected to the inner wall of the protective cylinder (224). A connecting block (2243) is fixedly provided on the fixed plate (2242), and the connecting block (2243) is hinged to the movable arm (2244).

5. A mechanical anti-misoperation ring main unit according to claim 4, characterized in that: The movable component (2245) is located between the fixed disk (2242) and the closed end of the protective cylinder (224). The limiting arm (2246) is hinged to the inner circumferential surface of the movable component (2245), and the movable arm (2244) is hinged to the outer circumferential surface of the connecting block (2243). The limiting arm (2246) and the movable arm (2244) are hinged to each other, forming a linkage mechanism driven by the movable component (2245) to change the radial extension amount.

6. A mechanical anti-misoperation ring main unit according to claim 1, characterized in that: The connecting assembly includes a connecting plate (23) fixedly connected to the hollow cylinder (226), and a sliding sleeve (24) is fixedly provided at one end of the connecting plate (23) away from the hollow cylinder (226). A sliding rod (25) is provided inside the sliding sleeve (24), and a connecting ring (27) sleeved on the outside of the switch gate (13) is rotatably provided on the sliding rod (25).

7. A mechanical anti-misoperation ring main unit according to claim 6, characterized in that: A locking ring (26) is provided on the outer side of the sliding sleeve (24), and the locking ring (26) is threadedly connected to the sliding rod (25).

8. A mechanical anti-misoperation ring main unit according to claim 1, characterized in that: The locking handle (223) is fitted with an anti-slip sleeve on its outer side, and the surface of the anti-slip sleeve is provided with anti-slip texture.

9. A mechanical anti-misoperation ring main unit according to claim 2, characterized in that: The inner wall of the limiting groove (21) is provided with a wear-resistant liner, and the wear-resistant liner is used to abut against the rubber part (2248).

10. A mechanical anti-misoperation ring main unit according to claim 4, characterized in that: The sleeve (221), hollow cylinder (226) and protective cylinder (224) have their axes coincide and are fixedly connected in sequence. The adjusting threaded rod (222) passes through the sleeve (221) and extends into the hollow cylinder (226). The linkage threaded rod (2241) passes through the protective cylinder (224) and extends into the hollow cylinder (226) and is fixedly connected to the adjusting threaded rod (222).

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