Interlocking mechanism modular installation structure of switchgear

Abstract

The utility model discloses an interlocking mechanism modularization installation structure of switch equipment, which comprises an isolation mechanism and a circuit breaker mechanism, the isolation mechanism comprises an isolation interlocking plate and a grounding interlocking plate which are arranged on an upper mechanism box in a manner of moving in the same direction, and the circuit breaker mechanism comprises a closing interlocking plate and an opening interlocking plate which are arranged on a lower mechanism box in a manner of moving in the same direction. The switch-on interlocking plate and the switch-off interlocking plate are respectively provided with a spring structure connected with the lower mechanism box, and when the isolation mechanism and the circuit breaker mechanism are installed on the switch cabinet, the switch-on interlocking plate and the switch-off interlocking plate are respectively in elastic abutting contact with the isolation interlocking plate and the grounding interlocking plate. The isolation mechanism and the circuit breaker mechanism can be installed as independent modules, the dependence on the installation precision is reduced, the contact position of the switching-on interlocking plate and the switching-off interlocking plate is adaptively adjusted through a spring structure, high-precision calibration is not needed, the assembly time is shortened, the installation convenience and the precision fault tolerance are improved, and the manufacturing, installation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of interlocking structures for switchgear, and specifically to a modular installation structure for the interlocking mechanism of a switchgear. Background Technology

[0002] Currently, the main function of switchgear is to open, close, control, and protect electrical equipment during the power generation, transmission, distribution, and energy conversion processes in the power system. Switchgear mainly consists of circuit breakers, three-position disconnect switches, operating mechanisms, instrument transformers, and various protective devices. Existing switchgear typically features a layout with the disconnect switch on top and the circuit breaker at the bottom. For this type of switchgear with the disconnect switch on top and the circuit breaker at the bottom, to ensure equipment and personnel safety and prevent misoperation, regulations require switchgear to meet the five-prevention interlocking requirements for safe operation. These five interlocking functions include preventing accidental opening or closing of circuit breakers, preventing opening or closing disconnect switches under load, preventing closing circuit breakers when the grounding switch is in the closed position, preventing accidental entry into energized compartments, and preventing accidental closing of grounding switches when energized, thus ensuring safety during operation. Existing switchgear also uses some interlocking mechanisms to achieve the five-proof interlocking requirements. However, existing interlocking mechanisms usually require the isolation mechanism and circuit breaker mechanism to be installed in the switchgear first, and then assembled on the isolation mechanism, circuit breaker mechanism and switchgear. Multiple interlocking rods are fixedly connected by multiple screws, making the overall structure relatively complex. Due to the large number of interconnected components, the installation accuracy is very high, the assembly is cumbersome, time-consuming and labor-intensive, and it is not convenient for later maintenance, increasing production costs. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the interlocking mechanism in the prior art is usually assembled after the isolation mechanism and the circuit breaker mechanism are installed, which requires high installation accuracy, is cumbersome to assemble, is inconvenient for later maintenance, and increases production costs.

[0004] To solve the above-mentioned technical problems, this utility model provides a modular installation structure for the interlocking mechanism of a switchgear, including an isolation mechanism and a circuit breaker mechanism installed from top to bottom on the switchgear. The isolation mechanism includes an upper mechanism box, an isolation operating shaft, a grounding operating shaft, and an isolation positioning plate rotatably disposed in the upper mechanism box, and an isolation interlocking plate and a grounding interlocking plate that are movably disposed in the same direction in the upper mechanism box and staggered front to back. The isolation positioning plate is driven by the main shaft of the isolation mechanism and intersects with the movement trajectory of the isolation interlocking plate. A grounding lever plate that intersects with the movement trajectory of the grounding interlocking plate is linkedly disposed on the grounding operating shaft.

[0005] The circuit breaker mechanism includes a lower mechanism box installed below the upper mechanism box, a closing knob and a opening knob rotatably mounted on the upper mechanism box, and a closing interlock plate and an opening interlock plate movably mounted on the lower mechanism box and distributed to the left and right. The opening interlock plate is provided with an interlocking rod for hanging the lower chamber door. The closing interlock plate and the opening interlock plate are respectively provided with spring structures for connecting the lower mechanism box, and both have an upward movement tendency under the action of the spring structures. The isolation interlock plate and the grounding interlock plate are respectively arranged on the upward path of the closing interlock plate and the opening interlock plate. When the isolation mechanism and the circuit breaker mechanism are installed on the switchgear, the closing interlock plate and the opening interlock plate are elastically in contact with the isolation interlock plate and the grounding interlock plate, respectively.

[0006] As a preferred embodiment, the isolation interlock plate and the grounding interlock plate are respectively movably mounted on the upper mechanism box via a first guide structure. The first guide structure includes a plurality of first guide holes respectively disposed on the isolation interlock plate and the grounding interlock plate, and a plurality of first guide rods fixed to the upper mechanism box and passing through the plurality of first guide holes. The isolation interlock plate has a first position in which it moves upward to block the isolation operating shaft and the grounding operating shaft, and a second position in which it moves downward to expose the isolation operating shaft and the grounding operating shaft. When the circuit breaker mechanism closes, the closing interlock plate elastically moves upward to push the isolation interlock plate to be limited to the first position.

[0007] As a preferred embodiment, the isolation mechanism includes an isolation indicator plate rotatably disposed between the isolation operating shaft and the grounding operating shaft, the isolation indicator plate being coaxially and linked with the isolation positioning plate; the isolation mechanism drives the interlocking indicator to block the grounding operating shaft when in the closing position, and drives the interlocking indicator to block the isolation operating shaft when in the grounding position; the isolation interlocking plate has a central slot surrounding the isolation positioning plate, the isolation mechanism drives the isolation positioning plate to lock the isolation interlocking plate in a second position when in the opening position, the isolation interlocking plate abutting against the closing interlocking plate in the second position to form a limiting engagement that restricts the rotation of the closing knob.

[0008] As a preferred embodiment, the closing knob has a closing knob plate that is linked together, and the closing interlocking plate is provided with a first limiting plate that cooperates with the closing knob plate. When the isolation interlocking plate is in the second position, the closing interlocking plate is pushed down and moves the first limiting plate to the rotation path of the closing knob plate. The first limiting plate and the closing knob plate abut against each other to form a limiting engagement that restricts the rotation of the closing knob.

[0009] As a preferred embodiment, the isolation interlocking plate includes an upper locking plate portion for simultaneously blocking the isolation operating shaft and the grounding operating shaft, and a lower locking plate portion that extends from the upper locking plate portion and is disposed between the isolation positioning plate and the closing interlocking plate. The upper locking plate portion and the lower locking plate portion form a central slot surrounding the isolation positioning plate. One side of the upper locking plate portion abuts against the isolation positioning plate, and the other side of the upper locking plate portion abuts against the upper end of the closing interlocking plate.

[0010] As a preferred embodiment, the circuit breaker mechanism includes a crank arm for opening and closing that is rotatably mounted on the lower mechanism housing and forms a linkage with a circuit breaker indicator. The circuit breaker indicator is provided with an arc-shaped connecting groove. The crank arm for opening and closing is driven by the main shaft of the circuit breaker mechanism and is provided with a connecting rod connected in the arc-shaped connecting groove.

[0011] As a preferred embodiment, the closing interlocking plate is provided with a second limiting plate that intersects with the movement trajectory of the opening and closing crank arm. When the circuit breaker mechanism closes, it drives the opening and closing crank arm to rotate and abut against the lower part of the second limiting plate. The closing interlocking plate and the opening and closing crank arm form a limiting engagement that locks the isolation interlocking plate in the first position.

[0012] As a preferred embodiment, the tripping interlock plate and the closing interlock plate are respectively movably mounted on the upper mechanism box via a second guide structure. The second guide structure includes multiple second guide holes respectively disposed on the isolation interlock plate and the grounding interlock plate, and multiple second guide rods fixed to the lower mechanism box and passing through the multiple first guide holes. The spring structure includes a first interlocking spring extending along the moving direction of the closing interlock plate and disposed between the closing interlock plate and the corresponding second guide rod, and a second interlocking spring extending along the moving direction of the tripping interlock plate and disposed between the tripping interlock plate and the corresponding second guide rod. The first interlocking spring and the second interlocking spring respectively drive the tripping interlock plate and the grounding interlock plate to move closer to the isolation mechanism.

[0013] As a preferred embodiment, the grounding interlock plate is movably disposed between the grounding operating shaft and the tripping interlock plate. The grounding operating shaft drives the grounding dial plate to switch between the grounding open position and the grounding closed position. When the grounding dial plate is in the grounding open position, it abuts against the grounding interlock plate to block the tripping interlock plate from moving upward, thereby limiting the opening of the lower chamber door.

[0014] As a preferred embodiment, the tripping interlock plate is linked to a fourth limiting plate extending towards one side of the tripping crank arm. The movement trajectory of the fourth limiting plate intersects with that of the tripping crank arm. When the circuit breaker mechanism trips, it drives the tripping crank arm to rotate onto the upward path of the fourth limiting plate. The tripping crank arm abuts against the fourth limiting plate to block the upward movement of the tripping interlock plate and limit the opening of the lower chamber door.

[0015] As a preferred embodiment, the tripping knob is linked to a tripping knob dial plate, and the tripping interlocking plate is provided with a third limiting plate whose movement trajectory intersects with that of the tripping knob dial plate. When the lower cabinet door is opened, the tripping interlocking plate drives the fourth limiting plate to move elastically upward and form a limiting engagement with the tripping knob dial plate. The tripping interlocking plate also pushes the grounding interlocking plate upward to limit the grounding disconnecting plate to the grounding closed position.

[0016] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0017] 1. In the modular installation structure of the interlocking mechanism provided by this utility model, when the isolation mechanism and the circuit breaker mechanism are installed vertically on the switchgear, the closing interlocking plate and the opening interlocking plate are elastically contacted with the isolation interlocking plate and the grounding interlocking plate respectively after installation. This technical solution, through the modular interlocking mechanism design, allows the isolation mechanism and the circuit breaker mechanism to be installed as independent modules, reducing the dependence on installation accuracy. The closing interlocking plate and the opening interlocking plate adaptively adjust the contact position through the spring structure, eliminating the need for high-precision calibration and shortening the assembly time. Even if there are minor errors between modules, reliable interlocking can be achieved through elastic compensation, reducing the risk of mechanical interference when multiple components are linked. On-site assembly is convenient, improving the reliability of interlocking actions and enhancing installation convenience and accuracy tolerance. This modular interlocking mechanism design achieves a three-in-one effect of high reliability, low maintenance cost, and rapid delivery through structural optimization and cost control. Its core is based on the forced interlocking logic of mechanical interlocking, combined with the flexibility and economy of modular architecture, which not only meets the interlocking safety requirements of traditional power distribution systems but also achieves the effect of modular standardized production and assembly.

[0018] 2. In the modular installation structure of the interlocking mechanism provided by this utility model, during the assembly of the isolation mechanism and the circuit breaker mechanism, mechanical interlocking is forcibly achieved through the elastic abutment contact design between the closing interlocking plate and the isolation interlocking plate, and between the opening interlocking plate and the grounding interlocking plate. This prevents risks such as accidental opening and operation under load, and meets the relevant requirements of switchgear equipment for five-proof interlocking. Furthermore, this modular interlocking mechanism supports independent replacement of functional units, improving maintenance efficiency and scalability. It can also shorten the delivery cycle by leveraging the advantages of modular inventory and rapid assembly, meeting customers' urgent needs and reducing total costs. The interlocking mechanism of this technical solution adopts a modular installation design, which significantly reduces manufacturing, installation and maintenance costs while ensuring the absolute reliability of the five-proof interlocking. The modular design also makes it easier to expand and integrate new technologies, which is in line with industry trends. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0020] Figure 1 This is a three-dimensional structural diagram of the modular installation structure of the interlocking mechanism of this utility model;

[0021] Figure 2 for Figure 1 The diagram shows the structure of the isolation mechanism after the isolation indicator plate is hidden.

[0022] Figure 3 This is a schematic diagram illustrating the interlocking between the isolation mechanism and the circuit breaker mechanism of this utility model. Figure 1 That is, the isolation mechanism restricts the circuit breaker mechanism from closing when it is in the open position;

[0023] Figure 4 This is a schematic diagram illustrating the interlocking between the isolation mechanism and the circuit breaker mechanism of this utility model. Figure 2 That is, when the circuit breaker mechanism is closed, the operation of the isolation mechanism is restricted;

[0024] Figure 5 This diagram illustrates the interlocking of the isolation mechanism and circuit breaker mechanism of this utility model with the lower chamber door. Figure 3 That is, the lower compartment door is restricted from opening when the circuit breaker mechanism is tripped or the isolating mechanism is not grounded;

[0025] Figure 6 This diagram illustrates the interlocking of the isolation mechanism and circuit breaker mechanism of this utility model with the lower chamber door. Figure 4 That is, when the lower chamber door is opened, the circuit breaker mechanism tripping and the isolating mechanism tripping operations are restricted.

[0026] Figure 7 This is a schematic diagram of the isolation mechanism of this utility model in the isolation closing position;

[0027] Figure 8 This is a schematic diagram of the isolation mechanism of this utility model at the isolation contact position.

[0028] Explanation of reference numerals in the attached drawings: 1. Isolation interlock plate; 11. Upper locking plate; 12. Lower locking plate; 2. Isolation indicator plate; 3. Isolation position plate; 4. Closing interlock plate; 41. First limit plate; 42. Second limit plate; 5. Opening / closing crank arm; 51. Circuit breaker indicator; 6. Grounding interlock plate; 7. Opening interlock plate; 71. Third limit plate; 72. Fourth limit plate; 73. Interlocking rod; 74. Plug-in section; 8. Upper mechanism box; 81. Isolation operating shaft; 82. Grounding operating shaft; 83. Grounding lever plate; 84. First guide rod; 85. First guide hole; 9. Lower mechanism box; 91. Closing knob; 92. Closing knob lever plate; 93. Opening lever plate; 94. Opening knob lever plate; 95. Second guide rod; 96. Second guide hole; 97. First interlocking spring; 98. Second interlocking spring. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Example

[0034] The following is a detailed description of this embodiment with reference to the accompanying drawings:

[0035] This embodiment provides, as follows: Figure 1-8 The diagram shows a modular installation structure for the interlocking mechanism of a switchgear, comprising an isolation mechanism and a circuit breaker mechanism installed from top to bottom in the cabinet (A in the diagram represents the isolation mechanism, and B represents the circuit breaker structure). The isolation mechanism is used to drive the disconnecting switch to switch between three positions: closed, open, and grounded closed. The isolation mechanism includes an upper mechanism box 8, and an isolation operating shaft 81, a grounding operating shaft 82, and an isolation positioning plate 3 rotatably disposed in the upper mechanism box 8, as well as an isolation interlocking plate 1 and a grounding interlocking plate 6 that are movably disposed in the upper mechanism box 8 and staggered front to back. The isolation positioning plate 3 is driven by the main shaft of the isolation mechanism and intersects with the movement trajectory of the isolation interlocking plate 1. A grounding lever plate 83 that intersects with the movement trajectory of the grounding interlocking plate 6 is linkedly disposed on the grounding operating shaft 82.

[0036] The circuit breaker mechanism includes a lower mechanism box 9 installed below the upper mechanism box 8, a closing knob 91 and a opening knob 93 rotatably mounted on the upper mechanism box 8, and a closing interlock plate 4 and an opening interlock plate 7 movably mounted on the lower mechanism box 9 and distributed to the left and right. The closing knob 91 and the opening knob 93 are respectively located on the movement paths of the closing interlock plate 4 and the opening interlock plate 7. The opening interlock plate 7 is provided with an interlocking rod 73 for hanging the lower chamber door. The closing interlock plate 4 and the opening interlock plate 7 are respectively provided with spring structures for connecting the lower mechanism box 9, and both have an upward movement tendency under the action of the spring structure. The isolation interlock plate 1 and the grounding interlock plate 6 are respectively arranged on the upward path of the closing interlock plate 4 and the opening interlock plate 7. When the isolation mechanism and the circuit breaker mechanism are installed on the switchgear, the closing interlock plate 4 and the opening interlock plate 7 are elastically in contact with the isolation interlock plate 1 and the grounding interlock plate 6, respectively.

[0037] In the above embodiments, when the isolation mechanism and circuit breaker mechanism are installed vertically on the switchgear, the closing interlock plate 4 and the opening interlock plate 7 are in elastic contact with the isolation interlock plate 1 and the grounding interlock plate 6 respectively after installation. This technical solution, through modular interlock mechanism design, allows the isolation mechanism and circuit breaker mechanism to be installed as independent modules, reducing the dependence on installation accuracy. The closing interlock plate 4 and the opening interlock plate 7 adaptively adjust their contact positions through a spring structure, eliminating the need for high-precision calibration and shortening assembly time. Even if there are minor errors between modules, reliable interlocking can be achieved through elastic compensation, reducing the risk of mechanical interference when multiple components are linked. On-site assembly is convenient, improving the reliability of interlocking actions and enhancing installation convenience and accuracy tolerance. This modular interlock mechanism design, through structural optimization and cost control, achieves a three-in-one market value of high reliability, low maintenance cost, and rapid delivery. Its core is based on the forced interlocking logic of mechanical interlocking, combined with the flexibility and economy of modular architecture, which not only meets the interlocking safety requirements of traditional power distribution systems but also achieves the effect of modular standardized production and assembly.

[0038] The isolation interlocking plate 1 and the grounding interlocking plate 6 are respectively movably mounted on the upper mechanism box 8 via a first guide structure, for reference. Figure 7-8 The first guide structure includes a plurality of first guide holes 85 respectively disposed on the isolation interlock plate 1 and the grounding interlock plate 6, and a plurality of first guide rods 84 fixed to the upper mechanism box 8 and passing through the plurality of first guide holes 85; the isolation interlock plate 1 has a first position in which it moves upward to block the isolation operating shaft 81 and the grounding operating shaft 82, and a second position in which it moves downward to expose the isolation operating shaft 81 and the grounding operating shaft 82, for reference. Figure 4When the circuit breaker mechanism closes, the closing interlock plate 4 elastically moves upward to push the isolation interlock plate 1 to lock in the first position. That is, when the isolation interlock plate 1 is limited by the closing interlock plate 4, it blocks the isolation operating shaft 81 and the grounding operating shaft 82, thereby preventing the disconnecting switch from being opened or closed under load. It can be seen that the isolation mechanism and the circuit breaker mechanism are interlocked through the simple mechanical movement of the isolation interlock plate and the closing interlock plate. The structure is compact, easy to maintain, has few related parts, low failure rate, and low maintenance cost.

[0039] The isolation mechanism includes an isolation indicator plate 2 that is rotatably disposed between the isolation operating shaft 81 and the grounding operating shaft 82, combined with Figure 1 , Figure 7-8 As shown, the isolation indicator plate 2 and the isolation positioning plate 3 are coaxially linked, meaning that both the isolation indicator plate 2 and the isolation positioning plate 3 are driven to rotate by the main shaft of the isolation mechanism. Specifically, when the isolation mechanism is in the closing position, the interlocking indicator blocks the grounding operation shaft 82, and when it is in the grounding position, the interlocking indicator blocks the isolation operation shaft 81. The isolation indicator plate 2 can indicate the working position of the disconnecting switch and also achieve interlocking between the isolation mechanism in the isolation position and the grounding position. In addition, when the isolation mechanism is in the opening position, it drives the isolation positioning plate 3 to lock the isolation interlocking plate 1 in the second position. In the second position, the isolation interlock plate 1 abuts against the closing interlock plate 4 to form a limiting engagement that restricts the rotation of the closing knob 91. More preferably, the closing knob 91 has a linked closing knob dial plate 92, and the closing interlock plate 4 is provided with a first limiting plate 41 that cooperates with the closing knob dial plate 92. When the isolation interlock plate 1 is in the second position, the closing interlock plate 4 is pushed downwards, causing the first limiting plate 41 to move onto the rotation path of the closing knob dial plate 92. The first limiting plate 41 abuts against the closing knob dial plate 92 to form a limiting engagement that restricts the rotation of the closing knob 91. Through the interlocking design between the isolation plate 3, the isolation interlocking plate 1, the closing interlocking plate 4, and the closing knob 91, the isolation plate 3 locks the lowered isolation interlocking plate 1 in the second position, preventing the closing interlocking plate 4 from moving upward under the limiting action of the isolation interlocking plate 1, and restricting the rotation of the closing knob 91. This improves the synchronicity and certainty of the interlocking action, achieving the purpose of restricting the circuit breaker from closing when the disconnecting switch is opened, thus preventing accidental closing of the circuit breaker under load and meeting the five-prevention operation requirements.

[0040] As a specific structural setting, such as Figure 3As shown, the isolation interlocking plate 1 includes an upper locking plate portion 11 for simultaneously blocking the isolation operating shaft 81 and the grounding operating shaft 82, and a lower locking plate portion 12 that extends from the upper locking plate portion 11 and is disposed between the isolation positioning plate 3 and the closing interlocking plate 4. The upper locking plate portion 11 and the lower locking plate portion 12 form a central slot surrounding the isolation positioning plate 3. One side of the lower locking plate portion 12 abuts against the isolation positioning plate 3, and the other side of the lower locking plate portion abuts against the upper end of the closing interlocking plate. In summary, referring to... Figure 4 When the isolation mechanism is in the isolation closing position or the grounding closing position, it drives the isolation separating plate 3 to rotate in the middle clearance groove and separate from the isolation interlocking plate 1, thereby avoiding the isolation interlocking plate 1. The closing interlocking plate 4 moves upward under the action of the spring, pushing the isolation interlocking plate 1 in contact with it to the upper position. At this time, the circuit breaker can be closed. (Reference) Figure 3 When the isolation mechanism is in the isolation open position, the movement state of the isolation plate 3 directly reflects the true position of the disconnecting switch. Even if the isolation interlock plate 1 fails to move down actively due to mechanical jamming, it can still be forcibly pushed to the second position when the isolation plate 3 is rotated to the open position, preventing "false opening" that would cause the interlock to fail. When the isolation mechanism is closed or grounded, the isolation plate 3 will be driven to disengage from the isolation interlock plate 1, thereby releasing the position lock of the isolation interlock plate 1. This structural setting, through the interference design of the movement trajectories of the isolation plate 3 and the isolation interlock plate 1, realizes the forced interlock and mechanical foolproofing of the opening operation, simplifies the operation logic, and ensures the interlock requirement that "the circuit breaker must not be closed if the isolation is not open".

[0041] In this embodiment, combined with Figure 1 , Figure 4-5As shown, the circuit breaker mechanism includes a closing / opening crank arm 5 rotatably mounted on the lower mechanism housing 9 and forming a linkage, and a circuit breaker indicator 51. The circuit breaker indicator 51 is provided with an arc-shaped connecting groove. The closing / opening crank arm 5 is driven by the main shaft of the circuit breaker mechanism and is provided with a connecting rod connected in the arc-shaped connecting groove. When the circuit breaker mechanism performs closing, it drives the closing / opening crank arm 5 to rotate in the forward direction and drives the circuit breaker indicator 51 to move to the closing indicator position to indicate that the circuit breaker is in the closed state. When the circuit breaker mechanism performs opening, it drives the closing / opening crank arm 5 to rotate in the reverse direction and drives the circuit breaker indicator 51 to move to the opening indicator position to indicate that the circuit breaker is in the closed state, thereby realizing the function of indicating the opening and closing working status of the circuit breaker. To achieve the interlocking purpose of restricting the operation of the disconnecting switch when the circuit breaker is closed, the closing interlocking plate 4 is provided with a second limiting plate 42 that intersects with the movement trajectory of the opening / closing crank arm 5. The opening / closing crank arm 5 rotates with the change of the circuit breaker's operating state, thereby providing clear mechanical position feedback and reducing the risk of misjudgment. When the circuit breaker mechanism closes, it drives the opening / closing crank arm 5 to rotate and lock it below the second limiting plate 42. The closing interlocking plate 4, through the second limiting plate 42 and the opening / closing crank arm 5, forms a limiting cooperation that locks the disconnecting interlocking plate 1 in the first position. When the switch is closed, the opening / closing crank arm 5 rotates to the downward path located on the second limit plate 42, blocking the downward movement of the closing interlock plate 4 by limiting and locking the second limit plate 42. At this time, the closing interlock plate 4 pushes the isolation interlock plate 1 to move upward and is in the first position, thereby blocking the isolation operating shaft 81 and the grounding operating shaft 82. Therefore, when the closing interlock plate 4 is stopped by the opening / closing crank arm 5, the isolation interlock plate 1 is locked in the first state to restrict the isolation mechanism from performing related operations, thereby meeting the interlocking requirements for preventing the opening and closing of the isolation switch under load.

[0042] In a further preferred configuration, the tripping interlock plate 7 and the closing interlock plate 4 are respectively movably mounted on the upper mechanism box 8 via a second guide structure. The second guide structure includes multiple second guide holes 96 respectively disposed on the isolation interlock plate 1 and the grounding interlock plate 6, and multiple second guide rods 95 fixed to the lower mechanism box 9 and passing through multiple first guide holes 85. Thus, the closing interlock plate 4 and the isolation interlock plate 1 move in the same direction, and the tripping interlock plate 7 and the grounding interlock plate 6 move in the same direction. (Reference) Figure 3The spring structure includes a first interlocking spring 97 extending along the moving direction of the closing interlocking plate 4 and disposed between the closing interlocking plate 4 and the corresponding second guide rod 95, and a second interlocking spring 98 extending along the moving direction of the opening interlocking plate 7 and disposed between the opening interlocking plate 7 and the corresponding second guide rod 95. The first interlocking spring 97 and the second interlocking spring 98 respectively drive the closing interlocking plate 4 and the opening interlocking plate 7 to move upward toward the side closer to the isolation mechanism. After the assembly of the isolation mechanism and the circuit breaker structure is completed, the closing interlocking plate 4 and the opening interlocking plate 7 elastically abut against the isolation interlocking plate 95. The lower ends of the locking plate 1 and the grounding interlock plate 6 tend to push the isolation interlock plate 1 and the grounding interlock plate 6 to move upward. This structural arrangement, through the elastic abutment contact design of the closing interlock plate 4 and the opening interlock plate 7, forces mechanical interlocking, preventing risks such as accidental opening and operation under load, and meeting the relevant requirements of the switchgear equipment for five-proof interlocking. Furthermore, this modular interlocking mechanism supports independent replacement of functional units, improving maintenance efficiency and scalability. It can also shorten the delivery cycle by leveraging the advantages of modular inventory and rapid assembly, meeting customers' urgent needs and reducing total costs.

[0043] The switchgear in this embodiment is preferably a switch cabinet, and has a lower compartment door located below the circuit breaker mechanism (the lower compartment door is not shown in the attached drawings). In the five-prevention interlocking requirements: the lower compartment door can only be opened when the disconnecting switch is in the grounded position and the circuit breaker mechanism is closed, to prevent accidental entry into the energized compartment. Therefore, in order to achieve the interlock between the disconnecting mechanism and the lower compartment door, combined with... Figure 4-6As shown, the grounding interlock plate 6 is movably disposed between the grounding operating shaft 82 and the tripping interlock plate 7. The grounding operating shaft 82 is used to realize the grounding tripping or grounding closing of the disconnecting switch, and drives the grounding dial plate 83 to switch between the grounding open and grounding closed positions. When the grounding is open, the grounding dial plate 83 abuts against the grounding interlock plate 6 to form a limit engagement that blocks the upward movement of the tripping interlock plate 7 and restricts the opening of the lower cabinet door. According to the fact that the tripping interlock plate 7 always has an upward tendency due to the action of the spring, but is restricted by the grounding interlock plate 6 and cannot release the lock on the lower cabinet door, the grounding operation can only be completed after the disconnecting mechanism completes the grounding operation. The grounding lever 83 is driven to release the limit on the trip interlock plate 7, which in turn allows the grounding interlock plate 6 to release the trip interlock plate 7, enabling the lower cabinet door to open. The advantage of this design is that by introducing the grounding lever, grounding interlock plate 6, and trip interlock plate 7 into the isolation mechanism, a simple mechanical movement coordination with the lower cabinet door is formed, creating a forced interlocking mechanism between the disconnecting switch and the lower cabinet door. Through pure mechanical interlocking, there is no need to rely on human judgment or electrical signals, ensuring the absolute safety of operation. The mechanical interlocking ensures that the lower cabinet door cannot be opened when the disconnecting switch is not grounded, protecting personnel safety and meeting the five-prevention safety standard of "preventing accidental entry into the energized compartment". It is important to understand that the interlocking rod and the lower chamber door are connected by a plug-in joint. Specifically, the interlocking rod 73 has a plug-in section 74 with an "I"-shaped cross-section. This plug-in section is movably connected to the U-shaped socket on the top edge of the lower chamber door, allowing the interlocking rod 73 to be movable relative to the lower chamber door. The lower chamber door needs to be lifted up and then pulled outward to disengage from the interlocking rod and open. Therefore, when the trip interlocking plate 7 is locked and cannot move upward, it will restrict the opening of the lower chamber door.

[0044] To achieve interlocking between the circuit breaker mechanism and the lower compartment door, combined with Figure 5-6 As shown, the tripping interlock plate 7 is linked to a fourth limiting plate 72 extending to one side of the tripping crank arm 5. The movement trajectory of the fourth limiting plate 72 intersects with that of the tripping crank arm 5. When the circuit breaker mechanism trips, it drives the tripping crank arm 5 to rotate onto the upward path of the fourth limiting plate 72. The tripping crank arm and the fourth limiting plate 72 abut against each other to form a limiting engagement that blocks the upward movement of the tripping interlock plate 7 and restricts the opening of the lower chamber door. This structural design, based on the aforementioned interlocking structure, introduces a fourth limit plate to achieve interlocking cooperation between the tripping interlocking plate and the interlocking limit components. This allows the lower cabinet door to be forcibly locked in both the circuit breaker tripping state and the disconnector switch ungrounded state, further enhancing the reliability and safety of the "five-proof" interlocking. It achieves interlocking between the circuit breaker mechanism, the disconnector mechanism, and the lower cabinet door, providing a double mechanical interlocking effect. Its safety far exceeds that of single-point interlocking, absolutely preventing accidental entry into a live area. Only when the circuit breaker is closed and the disconnector switch is grounded, thus establishing a grounding circuit, can the lower cabinet door be unlocked. This ensures that internal components can only be accessed after the equipment is completely de-energized and grounded, meeting the five-proof safety operation specifications.

[0045] In this embodiment, the interlocking requirement that "the circuit breaker cannot be tripped and the disconnector cannot be opened or closed when the lower cabinet door is open" must also be strictly followed. See the attached reference for details. Figure 6 Setting method: The trip knob 93 is linked to a trip knob lever 94. The trip interlock plate 7 is provided with a third limiting plate 71 that intersects with the movement trajectory of the trip knob lever 94. When the lower cabinet door is opened, the trip interlock plate 7 drives the fourth limiting plate 72 to move upward elastically and form a limiting engagement with the trip knob lever 94. The trip interlock plate 7 also pushes the grounding interlock plate 6 upward. According to the grounding of the disconnecting switch and the circuit breaker is kept in the closed state, through the interlocking setting between the circuit breaker mechanism and the disconnecting mechanism, that is, by limiting the downward movement of the closing interlock plate 4 through the tripping crank arm, the closing interlock plate 4, linked with the disconnecting interlock plate 1, moves upward and blocks the disconnecting operating shaft 81 and the grounding operating shaft 82, thereby restricting the disconnecting mechanism. The opening and closing operation of the structure is designed to prevent accidental disconnection of the isolating switch, thus achieving multiple interlocking functions. The advantage of this design is that when the lower cabinet door is opened, the opening operation of both the circuit breaker and the isolating switch is simultaneously blocked through the lower cabinet door interlocking design, avoiding the risk of single interlocking failure, improving the reliability of forced interlocking, and providing comprehensive protection through multiple linkages. The structure is simple and has a low failure rate. This design strictly follows the mandatory interlocking requirements of the five-prevention interlocking system, ensuring that the isolating switch remains grounded and the circuit breaker remains open during maintenance, conforming to the safety process of "power outage-voltage testing-grounding-tag". The mechanical interlocking achieves a hard constraint on the operation sequence, meeting the core requirement of "preventing misoperation" in the high-voltage switchgear safety specifications.

[0046] The interlocking mechanism used in the switchgear of this embodiment transforms the five-proof requirements into physical constraints through a precise mechanical interlocking structure design. It enforces operational sequences through mechanical interlocking, offering key advantages such as high reliability, intuitiveness, and low maintenance requirements. It is suitable for power equipment scenarios with extremely high safety and stability requirements, effectively reducing the risk of human error. Furthermore, this interlocking mechanism employs a modular installation design, significantly reducing manufacturing, installation, and maintenance costs while ensuring absolute reliability of the five-proof interlocking. The modular design also facilitates the expansion and integration of new technologies, aligning with industry trends.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A modular mounting structure for an interlock mechanism of a switching device, comprising a disconnect mechanism and a circuit breaker mechanism mounted to the switching device, characterized by: The isolation mechanism includes an upper mechanism housing (8) and an isolation operation shaft (81), a grounding operation shaft (82) and an isolation partition plate (3) rotatably disposed on the upper mechanism housing (8), as well as an isolation interlock plate (1) and a grounding interlock plate (6) movably disposed on the upper mechanism housing (8) and staggered in front and behind. The isolation partition plate (3) is driven by the main shaft of the isolation mechanism and intersects with the movement trajectory of the isolation interlock plate (1). The grounding operation shaft (82) is linked with a grounding lever plate (83) that intersects with the movement trajectory of the grounding interlock plate (6). The circuit breaker mechanism includes a lower mechanism box (9) installed below the upper mechanism box (8), a closing knob (91) and a opening knob rotatably mounted on the upper mechanism box (8), and a closing interlock plate (4) and an opening interlock plate (7) rotatably mounted on the lower mechanism box (9) and distributed to the left and right. The opening interlock plate (7) is provided with an interlock rod (73) connecting to the lower chamber door. The closing interlock plate (4) and the opening interlock plate (7) are respectively provided with a spring structure connecting to the lower mechanism box (9), and both have an upward movement tendency under the action of the spring structure. The isolation interlock plate (1) and the grounding interlock plate (6) are respectively mounted on the upward path of the closing interlock plate (4) and the opening interlock plate (7). When the isolation mechanism and the circuit breaker mechanism are installed on the switchgear, the closing interlock plate (4) and the opening interlock plate (7) are elastically contacted with the isolation interlock plate (1) and the grounding interlock plate (6).

2. The modular mounting structure for the interlocking mechanism of the switchgear according to claim 1, characterized in that: The isolation interlock plate (1) and the grounding interlock plate (6) are respectively moved and disposed on the upper mechanism box (8) through a first guide structure. The first guide structure includes a plurality of first guide holes (85) respectively disposed on the isolation interlock plate (1) and the grounding interlock plate (6), and a plurality of first guide rods (84) fixed to the upper mechanism box (8) and passing through the plurality of first guide holes (85). The isolation interlock plate (1) has a first position in which it moves upward to block the isolation operating shaft (81) and the grounding operating shaft (82), and a second position in which it moves downward to expose the isolation operating shaft (81) and the grounding operating shaft (82). When the circuit breaker mechanism is closed, the closing interlock plate (4) elastically moves upward to push the isolation interlock plate (1) to lock in the first position.

3. The modular mounting structure for the interlock mechanism of the switchgear according to claim 2, characterized in that: The isolation mechanism includes an isolation indicator plate (2) rotatably disposed between the isolation operation shaft (81) and the grounding operation shaft (82), the isolation indicator plate (2) and the isolation separation plate (3) being coaxially linked; the isolation mechanism drives the interlock indicator to block the grounding operation shaft (82) when in the closing position, and drives the interlock indicator to block the isolation operation shaft (81) when in the grounding position; the isolation interlock plate has a central slot surrounding the isolation separation plate, the isolation mechanism drives the isolation separation plate (3) to lock the isolation interlock plate (1) in the second position when in the opening position, the isolation interlock plate (1) abuts against the closing interlock plate (4) in the second position to form a limiting fit that restricts the rotation of the closing knob (91).

4. The modular mounting structure for the interlock mechanism of the switchgear according to claim 2, characterized in that: The closing knob (91) has a closing knob dial (92) that is linked together. The closing interlock plate (4) is provided with a first limiting plate (41) that cooperates with the closing knob dial. When the isolation interlock plate (1) is in the second position, the closing interlock plate (4) is pushed down and moves the first limiting plate (41) to the rotation path of the closing knob dial (92). The first limiting plate (41) and the closing knob dial (92) abut against each other to form a limiting cooperation that restricts the rotation of the closing knob (91).

5. The interlock mechanism modular mounting structure of the switchgear according to any one of claims 1 to 4, characterized by: The circuit breaker mechanism includes a crank arm (5) that is rotatably mounted on the lower mechanism box (9) and forms a linkage with it, and a circuit breaker indicator (51). The circuit breaker indicator (51) is provided with an arc-shaped connecting groove, and the crank arm (5) is provided with a connecting rod connected in the arc-shaped connecting groove. The crank arm (5) is driven by the main shaft of the circuit breaker mechanism.

6. The modular mounting structure for the interlock mechanism of the switchgear according to claim 5, characterized in that: The closing interlock plate (4) is provided with a second limiting plate (42) that intersects with the movement trajectory of the opening and closing crank arm (5). When the circuit breaker mechanism closes, it drives the opening and closing crank arm (5) to rotate and abut against the lower part of the second limiting plate (42). The closing interlock plate (4) abuts against the opening and closing crank arm (5) through the second limiting plate (42) to form a limiting fit that locks the isolation interlock plate (1) in the first position.

7. The modular mounting structure for the interlock mechanism of the switchgear according to claim 6, characterized in that: The tripping interlock plate (7) and the closing interlock plate (4) are respectively moved and disposed on the upper mechanism box (8) through a second guide structure. The second guide structure includes a plurality of second guide holes (96) respectively disposed on the isolation interlock plate (1) and the grounding interlock plate (6), and a plurality of second guide rods (95) fixed to the lower mechanism box (9) and passing through a plurality of first guide holes (85). The spring structure includes a first interlocking spring (97) extending along the moving direction of the closing interlock plate (4) and disposed between the closing interlock plate (4) and the corresponding second guide rod (95), and a second interlocking spring (98) extending along the moving direction of the tripping interlock plate (7) and disposed between the tripping interlock plate (7) and the corresponding second guide rod (95). The first interlocking spring (97) and the second interlocking spring (98) respectively drive the closing interlock plate (4) and the tripping interlock plate (7) to move upward toward the side closer to the isolation mechanism.

8. The modular mounting structure for the interlock mechanism of the switchgear according to claim 5, characterized in that: The grounding interlock plate (6) is movably disposed between the grounding operating shaft (82) and the tripping interlock plate (7). The grounding operating shaft (82) drives the grounding dial plate (83) to switch between the grounding open position and the grounding closed position. When the grounding dial plate (83) is in the grounding open position, it abuts against the grounding interlock plate (6) to form a limiting engagement that blocks the upward movement of the tripping interlock plate (7).

9. The modular mounting structure for the interlock mechanism of the switchgear according to claim 8, characterized in that: The tripping interlock plate (7) is linked to a fourth limiting plate (72) extending to one side of the tripping crank arm (5). The movement trajectory of the fourth limiting plate and the tripping crank arm (5) intersects. When the circuit breaker mechanism trips, it drives the tripping crank arm (5) to rotate to the upward path of the fourth limiting plate (72). The tripping crank arm and the fourth limiting plate (72) abut against each other to form a limiting engagement that blocks the upward movement of the tripping interlock plate (7).

10. The interlock mechanism modular mounting structure of a switchgear according to claim 8, characterized by: The trip knob (93) is linked to a trip knob dial plate (94). The trip interlock plate (7) is provided with a third limiting plate (71) that intersects with the movement trajectory of the trip knob dial plate (94). When the lower cabinet door is opened, the trip interlock plate (7) drives the fourth limiting plate (72) to move upward elastically and form a limiting cooperation with the trip knob dial plate (94).

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