Interlocking device of solid insulation ring main unit

Abstract

An interlocking device of a solid insulation ring main unit comprises a machine box and an interlocking device body arranged on one side of the machine box, the interlocking device body comprises a circuit breaker operating mechanism and an upper isolation operating mechanism or a lower isolation operating mechanism, and the upper isolation operating mechanism or the lower isolation operating mechanism is arranged on the machine box. Comprising an isolation main shaft, an isolation operation shaft, a grounding operation shaft, an isolation closing interlocking piece, an auxiliary switch, a hinge support column and a connecting rod, and the auxiliary switch comprises an auxiliary switch shaft, an auxiliary switch indicator and a swing arm rotating along with the auxiliary switch shaft. By improving the structures of the isolation closing interlocking sheet, the opening button and the closing button, parts are optimized, so that the part cost is reduced. According to the utility model, the structure is optimized, the indication of the auxiliary switch, the isolation opening and closing interlocking sheet and the button cap piece are directly printed by a plastic material instead of the original metal surface layer pasting film indication, the problems that the pasted identification is not firm and is easy to fall off are solved, the service life is longer, the appearance is more attractive, and the cost of replacing accessories is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of solid insulation switches, in particular to an interlocking device for a solid insulation ring network cabinet. Background Art

[0002] Ring Main Unit (Ring Main Unit) is an electrical equipment commonly used in ring network power supply. Its core components are load switches, fuses and disconnectors. Because the ring network unit is often installed on the distribution branch, the ring network unit is also considered to be a kind of outgoing line switch cabinet. It is an important switching equipment for ring network power supply and terminal power supply.

[0003] Solid insulated ring main unit uses epoxy resin material as insulator and solid-sealed pole technology to organically combine vacuum switch tubes, main conductive circuits and insulation supports into a whole. Through the movement of the operating mechanism, it can realize functions such as opening and closing load current or fault current, isolating loads, etc., thereby realizing the control of the power supply and distribution system and the protection of equipment and personal safety.

[0004] In the prior art, solid-insulated ring main unit (RMU) adopts a structural solution of either upper isolation or lower isolation.

[0005] Lower isolation focuses on isolating and controlling the load side of the ring main unit (RMU), primarily using a load switch or load isolating switch. When a load fault occurs, the lower isolation quickly isolates the faulty circuit. Mechanically linked interlocks and transmissions on the RMU drive the lower isolating blade and grounding contact of the solid-insulated switch to close, protecting grid equipment and loads.

[0006] Upper isolation primarily refers to the isolation and control of the power supply side of the ring main unit (RMU), typically using a load switch or load disconnector. When a power failure occurs, this isolation device quickly isolates the faulty circuit. Mechanically linked interlocks and transmissions on the RMU drive the upper disconnector and grounding contact within the solid-insulated switch to close, protecting the power supply network and preventing damage to other equipment.

[0007] As the instruction manual Figure 1-5 The conventional interlocking device shown includes an isolation-grounding operating mechanism. A1 is rotated by the isolation main shaft, connecting it to the grounding shaft via a bevel gear set in a transmission device (existing technology and not shown in the figure). A swing arm is mounted on the grounding shaft, rotating forward and reverse with the shaft, reciprocating the swing arm and pulling the insulating rod, which drives the isolation switch connected to the insulating rod to open and close the circuit breaker. This achieves upper or lower isolation.

[0008] The interlocking device also includes a circuit breaker operating mechanism that drives the vacuum switch tube in the solid-insulated switch. The elastic force of its energy storage component A2 acts on the circuit breaker main shaft A3, which, through the transmission device, causes the circuit breaker main shaft to perform instantaneous opening and closing actions, driving the vacuum switch tube back and forth.

[0009] In the existing interlocking device, an isolation operating shaft A4 and a grounding operating shaft A5 for manually operating the isolation main shaft A1 are provided, and an isolation separation and closing interlocking plate A6 is provided to prevent misoperation. The isolation separation and closing interlocking plate A6 is provided on the isolation main shaft A1. As the rotation angle of the isolation main shaft (i.e., the opening and closing position) rotates to the isolation position, or to the position of making way for the first and grounding operating shafts, the interlocking function is performed to prevent misoperation.

[0010] Similarly, the interlocking device is also provided with an opening button A7 and a closing button A8 for manually operating the energy storage group A2, and a connecting rod A10 driven by the auxiliary switch A9. The opening button A7, the closing button A8 and the connecting rod A10 are all interlocked with the energy storage component to drive different actions of the energy storage spring (the specific structure is shown in the drawings in the specification, which is prior art and will not be repeated here).

[0011] Among them, the auxiliary switch shaft of the auxiliary switch is provided with a first swing arm A17 hingedly connected to the connecting rod A10, and a second swing arm A11 is also provided, which is connected to the isolation and closing interlocking piece A12. The isolation and closing interlocking piece A12 is driven by the auxiliary switch A9 to isolate or make way for the isolation operating shaft A4.

[0012] At the same time, a gear auxiliary switch indicator A13 is coaxially arranged on the auxiliary switch shaft of the auxiliary switch to display the auxiliary switch operation status (different graphics are displayed according to the rotation angle of the auxiliary switch shaft).

[0013] The problem with the prior art is that Figure 1-5 It can be seen from the existing interlocking device shown that there are the following problems.

[0014] 1. Many parts of the existing interlocking device are made of metal. As shown in the figure, the isolation interlocking plate, the isolation closing interlocking plate, the assembly structure at the third and fourth operating levers, and the gear auxiliary switch indicator (these items are the improvement points of this application. There are other copper parts in the actual interlocking device, which are not mentioned here). Due to their respective functional limitations, the existing structure cannot be optimized, making it difficult to reduce the cost of components.

[0015] 2. The assembly structure problem of the third and fourth operating levers: as shown in the attached manual Figure 4As shown, the existing structure supports and guides the third and closing pushbuttons, achieving both pressing and rebounding functions, thereby meeting the interlocking motion requirements of the remaining components. Consequently, a large number of metal components are used to construct the bracket A16 for the third and closing pushbuttons. This bracket is constructed of metal to ensure operational reliability and service life.

[0016] 3. Isolation and closing interlocking plate problem: as shown in the attached manual Figure 5 As shown, a hinged support column A14 is provided in the middle of the existing isolation closing interlocking plate, one end of which is moved by the second swing arm A11 (clockwise in the figure), so that the other end blocks the isolation operating shaft. Under the setting of the tension spring A15, when the isolation closing interlocking plate loses the swing arm toggle, it automatically rotates to make way for the isolation operating shaft.

[0017] Due to the requirements of this structure, many small components such as the hinged support column A14 and the tension spring A15 are required. Similarly, in order to ensure operational reliability, service life and other factors, metal parts are used.

[0018] 4. Isolation interlocking piece problem: In order to achieve coaxial connection with the isolation main shaft and to be able to extend to the first and second operating rods for isolation, a special-shaped structure is required to meet the above functions, as shown in the attached manual. Figure 3 As shown, the isolation and separation interlocking plate of the prior art adopts a structure in which multiple metal parts are processed and then assembled, resulting in increased production costs.

[0019] 5. Labeling issues: The isolation interlocking plate and the gear auxiliary switch indicator also have the function of displaying the position relationship. Carving labels on metal parts will further increase the cost, so only stickers can be used. However, stickers will fall off, wear out and fade during long-term use, posing a safety hazard due to misidentification and misoperation.

[0020] In summary, if the above-mentioned components can be optimized and designed, and the use of metal parts can be reduced while ensuring that the original functional requirements are met, the overall cost of the interlocking device will be reduced, thereby achieving significant cost reduction benefits in the mass production of ring network cabinets and avoiding misoperation caused by falling labels. Utility Model Content

[0021] In order to solve the deficiencies of the above-mentioned technology, the utility model provides an interlocking device for a solid insulation ring network cabinet.

[0022] The technical solution of the utility model is as follows: an interlocking device of a solid-insulated ring network cabinet, comprising a chassis, an interlocking device arranged on one side of the chassis, the interlocking device comprising a circuit breaker operating mechanism, an upper isolation operating mechanism, or a lower isolation operating mechanism; the upper isolation operating mechanism or the lower isolation operating mechanism comprises an isolation main shaft, an isolation operating shaft, a grounding operating shaft, an isolation closing interlocking plate, an auxiliary switch, a hinged support column, and a connecting rod; the auxiliary switch comprises an auxiliary switch shaft rotation, an auxiliary switch indicator, and a swing arm rotating with the auxiliary switch shaft rotation; one end of the connecting rod is hinged to the swing arm, and the other end is hinged to a first interlocking component of an energy storage assembly, driving the first interlocking component to flip back and forth;

[0023] The isolating closing interlocking plate includes a first hinged end, a second blocking end, and a hinged hole provided at the middle section; the hinged support column is fixed to the chassis and hingedly connected to the hinged hole;

[0024] The end of the second barrier extends to the isolation operating shaft to provide shielding cooperation;

[0025] The first hinged end portion is provided with a first oblong groove, the middle section of the connecting rod corresponds to the position of the first oblong groove, and is provided with a driving column passing through the first oblong groove and slidingly fitting with the first oblong groove;

[0026] The swing arm drives the connecting rod to move, and the connecting rod driving column drives the isolation closing interlocking piece to flip over, thereby blocking or giving way to the isolation operating shaft.

[0027] By adopting the above technical solution and utilizing the hinged linkage structure of the connecting rod and the isolating and closing interlocking plate, the movement of the isolating and closing interlocking plate is driven simultaneously with the movement of the connecting rod itself.

[0028] Compared with the transmission structure, it eliminates a set of swing arms, tension springs and other components, which meets the functional requirements while saving costs.

[0029] The utility model is further provided with: the circuit breaker operating mechanism includes an opening button and a closing button, each of which includes a button base, a reset spring, a limit pin, and a button cap; the button base is fixedly connected to the chassis and is provided with a guide column, and the guide column is provided with a limit screw hole in the radial direction;

[0030] One end surface of the button cap is provided with a sliding hole adapted to the diameter of the guide post, and the button cap is provided with a second oblong groove radially extending into the sliding hole. The sliding hole is sleeved on the guide post for axial sliding engagement, and the limiting pin is threadedly fixed to the limiting screw hole through the second oblong groove from the outside of the guide cap;

[0031] The return spring is sleeved on the guide column and compressed between the button base and the button cap;

[0032] The outer peripheral surface of the button cap is provided with a slider portion in radial direction, which is slidably matched with the second interlocking component of the energy storage assembly.

[0033] The above technical solution, through the structural design of the button cap and button base, utilizes the axial length and positional relationship of the second oblong groove, the limiting screw hole, and the limiting pin to limit the button's pressing. Simultaneously, the limiting pin also interferes with the widthwise side surfaces of the second oblong groove, preventing the button cap from rotating, allowing the slider to maintain axial reciprocating motion and preventing failure of the second interlocking member. (The first and second interlocking members are both prior art and will not be described in detail.)

[0034] Compared with the instruction manual Figure 4 The existing structure shown eliminates the need for a large number of metal parts provided for the assembly bracket A16, thus significantly saving costs.

[0035] The present invention is further provided with the following configuration: the auxiliary switch indicator, the isolation / opening / closing interlocking piece, and the button cap are integrally formed as injection molded parts.

[0036] By adopting the above technical solution and combining the improvement of the above structure, the identification piece, isolation and separation interlocking piece, and button cap are changed to be integrally formed by injection molding, replacing metal parts and reducing costs.

[0037] The utility model is further provided with: the isolation and separation interlocking plate is an integral injection molded part, including a disk portion connected to the isolation main shaft, and two isolation arms extending to the isolation operating shaft and the grounding operating shaft respectively. The disk portion is provided with screw holes, and the isolation and separation interlocking plate and the auxiliary switch indicator are injection molded with identification text graphics.

[0038] By adopting the above technical solution and changing it to an injection molded part, the required text and graphic logos can be set directly on the mold, and the mold can be formed in one piece, eliminating the problems caused by pasting, and the service life is longer and the cost of replacing accessories is lower.

[0039] The beneficial effects of this utility model include structural improvements to the isolation and closing interlocking plate, opening pushbutton, and closing pushbutton, simplifying the structure and optimizing components while maintaining full functionality, thereby reducing component costs. Simultaneously with structural optimization, the auxiliary switch indicator, isolation and opening interlocking plate, and button cap are replaced from metal parts with injection molded parts, eliminating the problems associated with adhesive labeling, extending service life, and reducing component replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The prior art structure of the embodiment of the utility model Figure 1 ;

[0041] Figure 2 The prior art structure of the embodiment of the utility model Figure 2 ;

[0042] Figure 3 The prior art structure of the embodiment of the utility model Figure 3 ;

[0043] Figure 4 The prior art structure of the embodiment of the utility model Figure 4 ;

[0044] Figure 5 for Figure 1 The large picture is posted in the middle circle;

[0045] Figure 6 The structure of the embodiment of the utility model Figure 1 ;

[0046] Figure 7 The structure of the embodiment of the utility model Figure 2 ;

[0047] Figure 8 The structure of the embodiment of the utility model Figure 3 ;

[0048] Figure 9 for Figure 9 Large picture of the starting point in the middle circle;

[0049] Figure 10 The structure of the embodiment of the utility model Figure 4 ;

[0050] Figure 11 for Figure 7 Cross-sectional view at AA in the middle;

[0051] Figure 12 The structure of the embodiment of the utility model Figure 5 ;

[0052] Figure 13 The structure of the embodiment of the utility model Figure 6 ;

[0053] The numbers in the accompanying drawings are: 1. Chassis, 2-interlocking device, 3-circuit breaker operating cylinder, 31-opening button, 32-closing button, 33-button base, 331-guide column, 332-limiting screw hole, 333-limiting pin, 34-reset spring, 35-button cap, 351-sliding hole, 352-second long circular groove, 353-slider part, 4-grounding operating structure, 41-isolating main shaft, 42-isolating operating shaft, 43-grounding operating shaft, 44-isolating closing interlocking plate, 441-first long circular groove, 45-auxiliary switch, 451-auxiliary switch shaft rotation, 452-auxiliary switch indication, 453-swing arm, 46-hinged support column, 47-connecting rod, 471-driving column, 51-first chain member, 52-second chain member, 6-isolating opening and closing interlocking plate, 7-second auxiliary switch indication,

[0054] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be understood as limitations on this patent. DETAILED DESCRIPTION

[0055] To make the technical solution and its advantages of the present application clearer, the technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present application and are only used to explain the present application, not to limit the present application. It should be noted that, for ease of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0056] The following is a detailed description of the utility model in conjunction with the accompanying drawings. Figure 1-13 As shown, an interlocking device 2 of a solid-insulated ring main unit includes a chassis 1, an interlocking device 2 provided on one side of the chassis 1, the interlocking device 2 including a circuit breaker operating mechanism 3, an upper isolation operating mechanism 4, or a lower isolation operating mechanism 4. The upper isolation operating mechanism 4, or the lower isolation operating mechanism 4, includes an isolation main shaft 41, an isolation operating shaft 42, a grounding operating shaft 43, an isolation closing interlocking plate 44, an isolation opening and closing interlocking plate 6, an auxiliary switch 45, a hinged support column 46, and a connecting rod 47. The auxiliary switch 45 includes an auxiliary switch shaft 451, an auxiliary switch indicator 452, and a swing arm 453 that rotates with the auxiliary switch shaft 451. One end of the connecting rod 47 is hinged to the swing arm 453, and the other end is hinged to the first interlocking component 51 of the energy storage assembly, driving the first interlocking component 51 to flip back and forth;

[0057] The isolating closing interlocking plate 44 includes a first hinged end, a second blocking end, and a hinged hole provided at the middle section. The hinged support column 46 is fixed to the chassis 1 and hingedly connected to the hinged hole.

[0058] The end of the second barrier extends to the isolation operating shaft 42 to provide shielding cooperation;

[0059] The first hinged end is provided with a first oblong groove 441 , and the middle section of the connecting rod 47 corresponds to the position of the first oblong groove 441 , and is provided with a driving post 471 passing through the first oblong groove 441 and slidingly engaging with the first oblong groove 441 ;

[0060] The swing arm 453 drives the connecting rod 47 to move, and the connecting rod 47 drives the column 471 to drive the isolation and closing interlocking piece 44 to flip, thereby blocking or giving way to the isolation operating shaft 42.

[0061] By utilizing the hinged linkage structure between the connecting rod 47 and the isolating and closing interlocking piece 44 , the movement of the isolating and closing interlocking piece 44 is driven simultaneously with the movement of the connecting rod 47 itself.

[0062] Compared with the transmission structure, a group of swing arms 453, tension springs and other components are omitted, which meets the functional requirements while saving costs.

[0063] The circuit breaker operating mechanism 3 includes an opening button 31 and a closing button 32. The opening button 31 and the closing button 32 each include a button base 33, a return spring 34, a limit pin 333, and a button cap 35. The button base 33 is fixedly connected to the chassis 1 and is provided with a guide column 331. The guide column 331 is provided with a limit screw hole 332 in the radial direction.

[0064] One end surface of the button cap 35 is provided with a sliding hole 351 that matches the diameter of the guide post 331. The button cap 35 is radially provided with a second elongated circular groove 352 that extends through the sliding hole 351. The sliding hole 351 is sleeved on the guide post 331 for axial sliding engagement. The limiting pin 333 extends from the outside of the guide cap, passes through the second elongated circular groove 352, and is threadedly secured to the limiting screw hole 332.

[0065] The return spring 34 is sleeved on the guide post 331 and compressed between the button base 33 and the button cap 35;

[0066] The outer peripheral surface of the button cap 35 is provided with a slider portion 353 along the radial direction, which is slidably matched with the second interlocking component 52 of the energy storage assembly.

[0067] The structural design of the button cap 35 and button base 33 utilizes the axial length and positional relationship between the second oblong groove 352, the limiting screw hole 332, and the limiting pin to limit the button's pressing action. The limiting pin also interferes with the widthwise side surfaces of the second oblong groove 352, preventing the button cap 35 from rotating. This allows the slider portion 353 to maintain axial reciprocating motion, preventing failure of the second interlocking member. (Both the first and second interlocking members are prior art and will not be described in detail.)

[0068] Compared with the instruction manual Figure 4 The existing structure shown eliminates the need for a large number of metal parts provided for the assembly bracket A16, thus significantly saving costs.

[0069] The auxiliary switch indicator 452, the isolation / opening interlocking plate 6, and the button cap 35 are integrally formed as injection molded parts.

[0070] In combination with the above structural improvements, the identification piece, the isolation and separation interlocking piece 6, and the button cap 35 are changed to be integrally formed by injection molding, replacing metal parts and reducing costs.

[0071] Further configuration of the present invention: the isolation and separation interlocking plate 6 is an integrally formed injection molded part, including a disk portion connected to the isolation main shaft 41, and two isolation arms 61 extending to the isolation operating shaft 42 and the grounding operating shaft 43 respectively. The disk portion is provided with screw holes, and the isolation and separation interlocking plate 6 and the auxiliary switch indicator 452 are injection molded with identification text graphics.

[0072] After changing to injection molded parts, the required text and graphic logos can be set directly on the mold, and integrated molding can be achieved, eliminating the problems caused by pasting, and the service life is longer and the cost of replacing accessories is lower.

[0073] By improving the structure of the isolation and closing interlock plate 44, the opening button 31, and the closing button 32, while maintaining full functionality, the structure is simplified and the components are optimized, thereby reducing component costs. Simultaneously with this structural optimization, the auxiliary switch indicator 452, the isolation and opening interlock plate 6, and the button cap 35 have been replaced from metal parts with injection molded parts, eliminating the problems associated with adhesive labeling, extending service life, and reducing replacement costs.

[0074] Other metal parts can be directly replaced by plastic parts. Similarly, if the circuit breaker mechanism is also provided with a second auxiliary switch indicator 7, this component can be directly replaced by an injection molded part without affecting the associated structure.

[0075] It is understandable that for those skilled in the art, any equivalent replacement or change of the technical solution and the concept of the utility model should fall within the scope of protection of the claims attached to the utility model.

Claims

1. An interlocking device for a solid insulated ring main unit, comprising a chassis, an interlocking device provided on one side of the chassis, the interlocking device comprising a circuit breaker operating mechanism, an upper isolation operating mechanism, or a lower isolation operating mechanism, characterized in that: The upper isolation operating mechanism or the lower isolation operating mechanism includes an isolation main shaft, an isolation operating shaft, a grounding operating shaft, an isolation opening and closing interlocking plate, an isolation closing interlocking plate, an auxiliary switch, a hinged support column, and a connecting rod. The auxiliary switch includes an auxiliary switch shaft rotation, an auxiliary switch indicator, and a swing arm that rotates with the auxiliary switch shaft rotation. One end of the connecting rod is hinged to the swing arm, and the other end is hinged to the first interlocking component of the energy storage assembly, driving the first interlocking component to flip back and forth; The isolating closing interlocking plate includes a first hinged end, a second blocking end, and a hinged hole provided at the middle section; the hinged support column is fixed to the chassis and hingedly connected to the hinged hole; The end portion of the second barrier extends to the isolation operating shaft to provide shielding cooperation; The first hinged end portion is provided with a first oblong groove, the middle section of the connecting rod corresponds to the position of the first oblong groove, and is provided with a driving column passing through the first oblong groove and slidingly fitting with the first oblong groove; The swing arm drives the connecting rod to move, and the connecting rod driving column drives the isolation closing interlocking piece to flip over, blocking or giving up the position of the isolation operating shaft.

2. The interlocking device of a solid insulated ring main unit according to claim 1, characterized in that: The circuit breaker operating mechanism includes an opening button and a closing button, each of which includes a button base, a reset spring, a limit pin, and a button cap. The button base is fixedly connected to the chassis and is provided with a guide column, which is provided with a limit screw hole in the radial direction. One end surface of the button cap is provided with a sliding hole that matches the diameter of the guide column. The button cap is provided with a second oblong groove that extends radially through the sliding hole. The sliding hole is sleeved on the guide column for axial sliding engagement. The limit pin is threadedly fixed to the limit screw hole from the outside of the guide cap through the second oblong groove. The return spring is sleeved on the guide column and compressed between the button base and the button cap; The outer peripheral surface of the button cap is provided with a slider portion in radial direction, which is slidably matched with the second interlocking component of the energy storage assembly.

3. The interlocking device of a solid insulated ring main unit according to claim 2, characterized in that: The auxiliary switch indicator, the isolation opening and closing interlocking piece, and the button cap are integrally formed as injection molded parts.

4. The interlocking device of a solid insulated ring main unit according to claim 3, characterized in that: The isolation interlocking plate is an integral injection molded part, including a disk portion connected to the isolation main shaft, and two isolation arms extending to the isolation operating shaft and the grounding operating shaft respectively. The disk portion is provided with screw holes, and the isolation interlocking plate and the auxiliary switch indicator are injection molded with identification text graphics.

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