Interlocking mechanism for switch cabinet and switch cabinet

Abstract

The application provides an interlocking mechanism for a switch cabinet and the switch cabinet. The interlocking mechanism comprises: a linkage assembly capable of driving the blocking piece to move and a door lock plate (3) to move; the blocking piece is capable of moving between a blocking position and a avoiding position, the blocking piece is located at the blocking position, and the blocking piece can block the opening structure, the blocking piece is located at the avoiding position, and the opening structure can be used for opening the vacuum circuit breaker; the door lock plate (3) is used for moving between a locking position for locking the cable chamber door and an unlocking position for unlocking the cable chamber door, the door lock plate (3) can be located at the unlocking position when the blocking piece is located at the blocking position, and the door lock plate (3) can be located at the locking position when the blocking piece is located at the avoiding position.

Description

Technical Field

[0001] This invention relates to the field of switchgear, and in particular to an interlocking mechanism for switchgear and a switchgear itself. Background Technology

[0002] Switchgear is a crucial component of power systems, and a key part of the switchgear is the circuit breaker. Gas-insulated switchgear typically includes a low-voltage compartment, a gas chamber, and a cable compartment. The gas chamber usually houses a three-position switch and a vacuum circuit breaker. The main functions of the vacuum circuit breaker include overload protection and short-circuit protection. The operating mechanism of the vacuum circuit breaker allows the moving contact to contact or move away from the stationary contact. When the moving contact is in contact with the stationary contact, the vacuum circuit breaker closes, providing the aforementioned protection. When the moving contact separates from the stationary contact, the vacuum circuit breaker opens, and the aforementioned protection function is lost.

[0003] To ensure the safety of staff, the cable compartment door can only be opened when the vacuum circuit breaker is closed in order to inspect the components inside the cable compartment. Summary of the Invention

[0004] In view of this, the present invention proposes an interlocking mechanism for a switchgear, the switchgear including a cable compartment door and a vacuum circuit breaker, the vacuum circuit breaker including a tripping structure for tripping the vacuum circuit breaker, the tripping structure corresponding to a blocking member, and the interlocking mechanism including:

[0005] A linkage component that can move the blocking member and a door lock plate;

[0006] The blocking member is movable between a blocking position and a yielding position. When the blocking member is in the blocking position, it can block the tripping structure. When the blocking member is in the yielding position, the tripping structure can be used to trip the vacuum circuit breaker.

[0007] The door lock plate is movable between a locked position for locking the cable compartment door and an unlocked position for unlocking the cable compartment door. When the blocking member is in the blocking position, the door lock plate can be in the unlocked position, and when the blocking member is in the avoidance position, the door lock plate can be in the locked position.

[0008] In this invention, the cable compartment door can only be opened when the vacuum circuit breaker is closed, and the vacuum circuit breaker cannot trip when the cable compartment door is open, thereby ensuring the safety of the staff. Moreover, the interlocking mechanism has a simple structure and low cost.

[0009] Optionally, according to the interlocking mechanism described above, the linkage component includes:

[0010] A first linkage structure is used to move the door lock plate between a locked position and an unlocked position;

[0011] A second linkage structure is provided, wherein the first linkage structure can drive the second linkage structure to move, and the second linkage structure is used to drive the blocking member to move between a blocking position and an avoidance position.

[0012] Optionally, according to the interlocking mechanism described above, the first linkage structure includes:

[0013] An L-shaped rocker arm is rotatable along a first axis, and a first end of the L-shaped rocker arm is movable between a first position and a second position.

[0014] A rod-shaped part, the L-shaped rocker arm can drive the rod-shaped part to rotate along a second axis, and the rod-shaped part can drive the door lock plate to move between a locked position and an unlocked position during the rotation, the first axis and the second axis are parallel.

[0015] By using an L-shaped rocker arm in conjunction with a rod-shaped part, the rotation angle and distance can be adjusted, thereby moving the door lock plate the required distance. This combination structure is simple and has a low cost to implement.

[0016] Optionally, according to the interlocking mechanism described above, the bent portion of the L-shaped rocker is hinged to a fixed plate, the second end of the L-shaped rocker is hinged to the rod-shaped portion, the fixed plate has an arc-shaped hole, and the portion of the L-shaped rocker hinged to the rod-shaped portion can slide along the arc-shaped hole, with the rod-shaped portion hinged to the fixed plate. This implementation is simple in structure and low in cost.

[0017] Optionally, according to the interlocking mechanism described above, the tripping structure includes a tripping button and a tripping plate. The tripping button can push the tripping plate to trip the vacuum circuit breaker. When the blocking member is in the blocking position, the blocking member is located on the movement path of the tripping plate.

[0018] The second linkage structure includes:

[0019] A movable component, wherein the first linkage structure is capable of driving the movable component to move;

[0020] A lever structure, wherein the movable element can trigger the lever structure to move, and the lever structure can push the blocking element to move.

[0021] The combination of moving parts and lever structure makes it relatively easy to implement and has a low cost.

[0022] Optionally, according to the interlocking mechanism described above, the lever structure includes:

[0023] A first lever, wherein the movement of the rocker structure can drive the movement of a movable component, and the movable component can drive the first end of the first lever to move;

[0024] A second lever, wherein the second end of the first lever can drive the first end of the second lever to move, and the second end of the second lever can drive the blocking member to move between the avoidance position and the blocking position.

[0025] By combining the first and second levers, pushing can be achieved in a small space, and the required distance of movement can be achieved by adjusting the length of the lever arms.

[0026] Optionally, according to the interlocking mechanism described above, the tripping structure includes an electric circuit and a micro switch, wherein the micro switch is connected in series with the electric circuit, and when the blocking member is in the blocking position, the blocking member can trigger the micro switch to disconnect the electric circuit.

[0027] The second linkage component includes: a movable component, wherein the first linkage structure can drive the movable component to move, and the blocking component is integrally formed with the movable component.

[0028] Optionally, according to the interlocking mechanism described above, it may also include:

[0029] A first reset element for resetting the blocking element from the blocking position to the yielding position; and / or

[0030] A second reset element is provided for resetting the door lock plate from the unlocked position to the locked position.

[0031] This ensures that the corresponding components automatically reset, guaranteeing the reliability of the interlocking mechanism.

[0032] Optionally, according to the interlocking mechanism described above, it may also include:

[0033] The operating mechanism of the vacuum circuit breaker has a main shaft for switching the vacuum circuit breaker between an open position and a closed position. The main shaft is equipped with a stop portion. When the vacuum circuit breaker is in the open position, the stop portion can block the movement of the moving part; when the vacuum circuit breaker is in the closed position, the stop portion can avoid the movement path of the moving part; and / or

[0034] The switchgear also includes a limiting mechanism. When the vacuum circuit breaker is in the open position, the limiting mechanism can prevent the door lock plate from moving from the locked position to the unlocked position. When the vacuum circuit breaker is in the closed position, the limiting mechanism can avoid the movement path of the door lock plate. Through the cooperation between the stop part on the main shaft and the moving part, the interlock between the vacuum circuit breaker, the stop part, and the door lock plate can be realized, further ensuring the reliability of the switchgear.

[0035] The present invention also provides a switch cabinet, including an interlocking mechanism for the switch cabinet as described in any of the preceding claims. Attached Figure Description

[0036] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which will make the above and other features and advantages of the present invention more apparent to those skilled in the art. In the drawings:

[0037] Figure 1 This is a schematic diagram of the door lock plate of the interlocking mechanism for a switch cabinet in the locked state according to an embodiment of the present invention.

[0038] Figure 2 for Figure 1 A structural schematic diagram of the interlocking mechanism used in switchgear from another angle.

[0039] Figure 3 for Figure 1 A partial structural diagram of the interlocking mechanism used in switchgear.

[0040] Figure 4 This is a schematic diagram of the door lock plate of the interlocking mechanism for a switch cabinet in the unlocked state according to an embodiment of the present invention.

[0041] Figure 5 for Figure 4 A schematic diagram of the interlocking mechanism used in switchgear from another angle.

[0042] Figure 6 for Figure 4 A partial structural diagram of the interlocking mechanism used in switchgear.

[0043] The accompanying figure is labeled as follows:

[0044] 11-L type joystick

[0045] 12-rod-shaped part

[0046] 121-First Opening

[0047] 13-Moving parts

[0048] 131-Second Opening

[0049] 132-Third long hole

[0050] 133-Through Hole

[0051] 14-First Lever

[0052] 15-Second Lever

[0053] 21-First blocking component

[0054] 22-Second blocking component

[0055] 3-Door lock plate

[0056] 31-Prominent part

[0057] 32-First long hole

[0058] 41-Break plate

[0059] 5-Micro switch

[0060] 61-First Axis

[0061] 62-Second Axis

[0062] 70-First Frame Board

[0063] 71-Fixing Plate

[0064] 711-Arc Hole

[0065] 72-Second Frame Plate

[0066] 721-Protrusion

[0067] 73-Panel

[0068] 81-First Reset Component

[0069] 82-Second Reset Component

[0070] 91-Positioning Pin

[0071] 92-pin body Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of this invention clearer, the following embodiments are provided to further illustrate the invention in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.

[0073] This invention provides an interlocking mechanism for switchgear to ensure the interlock between the vacuum circuit breaker and the cable compartment door. Specifically, the cable compartment door can only be opened when the vacuum circuit breaker is closed, and cannot be opened when the vacuum circuit breaker is open, thus ensuring the safety of personnel. Vacuum circuit breakers typically have both a tripping mechanism and a closing mechanism. The tripping mechanism controls the opening of the vacuum circuit breaker, and the closing mechanism controls its closing.

[0074] like Figures 1 to 6 The diagram shown is a structural schematic of an interlocking mechanism for a switchgear according to the present invention. The interlocking mechanism includes a linkage component, a blocking component, and a door lock plate 3.

[0075] The linkage component can drive the blocking member and the door lock plate 3 to move. As an example, the linkage component can be composed of multiple parts. When one structure moves, the other structures move accordingly, ultimately driving the blocking member and the door lock plate 3 to move.

[0076] The blocking element can move between a blocking position and a yielding position. When the blocking element is in the blocking position, it can block the tripping structure. When the blocking element is in the yielding position, the tripping structure can be used to trip the vacuum circuit breaker. Figures 1 to 3 The diagram shows the situation where the blocking element is in the avoidance position. Figures 4 to 6 The diagram shows the blocking element in the unlocked position. The blocking element blocking the tripping structure indicates that the tripping structure cannot be used to trip the vacuum circuit breaker, for example, the tripping structure cannot operate, or even if it does operate, it cannot succeed.

[0077] As an example, for a vacuum circuit breaker, the tripping structure can be either manually controlled or electrically controlled, or it can include both. To ensure operational reliability, vacuum circuit breakers are typically equipped with a manually controlled tripping structure, allowing operators to trip the circuit breaker manually. To ensure intelligent operation, vacuum circuit breakers are typically equipped with an electrically controlled tripping structure, allowing operators to trip the circuit breaker remotely via a signal. These two structures can coexist, or one can be chosen to be used. The corresponding blocking components for these two structures can be different.

[0078] To distinguish the blocking components corresponding to the two tripping structures, the blocking component corresponding to the manually controlled tripping structure is called the first blocking component 21, and the blocking component for the electrically controlled tripping structure is called the second blocking component 22. For the manually controlled tripping structure, it includes a tripping button (not shown in the figure) and a tripping plate 41. The tripping button is located on the panel of the vacuum circuit breaker. The operator can press the tripping button, which pushes the tripping plate 41 to trip the vacuum circuit breaker. When the first blocking component 21 is in the blocking position, it is located on the movement path of the tripping plate 41. Thus, the tripping plate 41 cannot reach the predetermined position to trip the vacuum circuit breaker. When the first blocking component 21 is in the avoidance position, it is away from the movement path of the tripping plate 41. Thus, the operator can push the tripping plate 41 to trip the vacuum circuit breaker by pressing the tripping button. The electrically controlled tripping structure includes an electric circuit and a micro switch 5. The micro switch 5 is connected in series with the electric circuit. The electric circuit can control the vacuum circuit breaker to close or open. When the second blocking member 22 is in the blocking position, the second blocking member 22 can trigger the micro switch 5 to disconnect the electric circuit. As an example, for instance... Figure 5 and Figure 6 As shown, the second blocking member 22 presses the micro switch 5, causing the electric circuit to be disconnected. At this time, the vacuum circuit breaker cannot be tripped by electric control.

[0079] Both the manually controlled and electrically controlled tripping structures mentioned above can adopt existing technologies, thus achieving interlocking without adjusting the existing tripping structure, resulting in lower costs.

[0080] The door lock plate 3 is used to move between a locked position (locked) and an unlocked position (unlocked). When the blocking member is in the blocking position, the door lock plate 3 can be in the unlocked position; when the blocking member is in the avoidance position, the door lock plate 3 can be in the locked position. When the door lock plate 3 is in the unlocked position, the cable compartment door can be opened; when the door lock plate 3 is in the locked position, the cable compartment door cannot be opened. As an example, the linkage component moves the blocking member to the blocking position and simultaneously moves the door lock plate 3 to the unlocked position, thus allowing the cable compartment door to open and preventing the vacuum circuit breaker from tripping. After the cable compartment door is closed, the linkage component can move the door lock plate 3 from the unlocked position to the locked position and can also move the blocking member from the blocking position to the avoidance position.

[0081] In this invention, the interlocking mechanism is designed to ensure that the cable compartment door can only be opened when the vacuum circuit breaker is closed, and the vacuum circuit breaker cannot trip when the cable compartment door is open, thereby ensuring the safety of the staff. In addition, the interlocking mechanism is simple in structure and low in cost.

[0082] As an example, such as Figures 1 to 6 As shown, the linkage component includes a first linkage structure and a second linkage structure. The first linkage structure moves the door lock plate 3 between a locked position and an unlocked position. Furthermore, the first linkage structure can move the second linkage structure, which moves the blocking member between a blocking position and a clearance position.

[0083] As an example, the first linkage structure includes an L-shaped rocker arm 11 and a rod-shaped portion 12, with the L-shaped rocker arm 11 hinged to the rod-shaped portion 12. The L-shaped rocker arm 11 is rotatable along a first axis 61, and its first end is movable between a first position and a second position. Figures 1 to 3 This shows the case where it is in the first position. Figures 4 to 6 The image shows the L-shaped rocker arm 11 in its second position. The L-shaped rocker arm 11 can also rotate the rod-shaped part 12 along a second axis 62. During rotation, the rod-shaped part 12 moves the door lock plate 3 between the locked and unlocked positions. The first axis 61 is parallel to the second axis 62. The first end of the L-shaped rocker arm 11 can be operated by a worker; for example, the worker can hold one end of the L-shaped rocker arm 11 and move it up and down, thus triggering the rotation of the L-shaped rocker arm 11. The upward direction can also be referred to as the "first direction." The rotation of the L-shaped rocker arm 11 causes the rod-shaped part 12 to rotate, which in turn causes the door lock plate 3 to move in a second direction. For example, the direction from the locked position to the unlocked position is the "second direction." The first direction is perpendicular to the second direction, and the direction of the first axis 61 can be referred to as the "third direction." By using the combination of the L-shaped rocker arm 11 and the rod-shaped part 12, the rotation angle and distance can be adjusted, thereby moving the door lock plate 3 the required distance. This combination structure is simple and has a low implementation cost.

[0084] As an example, the bent portion of the L-shaped rocker arm 11 is hinged to a fixed plate 71, such as... Figure 3 and Figure 6 As shown, the position of the first axis 61 is the hinge position of the bent part, and the position of the second axis 62 is the position where the rod-shaped part 12 is hinged to the fixed plate 71. The second end of the first L-shaped rocker arm 11 is hinged to the rod-shaped part 12. The fixed plate 71 has an arc-shaped hole 711, and the part of the L-shaped rocker arm 11 that is hinged to the rod-shaped part 12 can slide along the arc-shaped hole 711. The rod-shaped part 12 is hinged to the fixed plate 71. Figure 3 and Figure 6As shown, the fixed plate 71 can be part of the vacuum circuit breaker itself, and it is fixed in place. An L-shaped rocker arm 11 is used, with a hinge at the bend. The linkage between the L-shaped rocker arm 11 and the rod-shaped part 12 is achieved through an arc-shaped hole 711 on the fixed plate 71. This not only limits the moving position and direction, but also allows for rotation at the desired angle by moving the first end of the L-shaped rocker arm 11, thereby moving the door lock plate 3 and achieving the corresponding moving distance. This implementation method has a simple structure and low cost. Figure 3 and Figure 6 As shown, the end of the rod-shaped portion 12 away from the L-shaped rocker arm 11 has a first opening 121, and the door lock plate 3 has a protrusion 31 that extends into the first opening 121. Thus, the rotation of the rod-shaped portion 12 can drive the door lock plate 3 to move linearly. To limit the direction of movement of the door lock plate 3, a first elongated hole 32 can be provided on the door lock plate 3. A protrusion 721 is provided on the second frame plate 72 of the vacuum circuit breaker, which passes through the first elongated hole 32. Thus, the door lock plate 3 can slide smoothly along the second direction and the opposite direction.

[0085] The second linkage structure will be further explained below.

[0086] For the manually controlled tripping structure, the second linkage structure includes a moving component 13 and a lever structure. The first linkage structure can drive the moving component 13 to move; specifically, when the L-shaped rocker arm 11 moves up and down, it can drive the moving component 13 to move up and down. The moving component 13 can trigger the lever structure to move, and the lever structure can push the first blocking component 21 to move. In order for the first linkage component to be operable, the position of the first linkage component needs to be close to the switch cabinet panel 73, and part of it needs to be able to extend out from it. However, the original tripping structure is a certain distance from the first linkage component. Therefore, a different second linkage structure can be used to block the tripping circuit. The combination of the moving component and the lever structure is relatively convenient to implement and has a low cost.

[0087] For manually controlled tripping structures, such as Figures 1 to 6As shown, a lever structure is used to push the first blocking member 21. For example, it includes two mutually perpendicular levers, a first lever 14 and a second lever 15. This allows adjustment of the direction of force and enables the first blocking member 21 to be moved to a set distance with a relatively small force. Its structure is simple and easy to implement. As an example, the lever structure includes a first lever 14 and a second lever 15. The movement of the rocker structure can drive a moving member 13 to move. The moving member 13 can push the first end of the first lever 14 to move, and the second end of the first lever 14 can drive the first end of the second lever 15 to move. The second end of the second lever 15 can drive the first blocking member 21 to move between a clearance position and a blocking position. Figure 1 , Figure 2 as well as Figure 4 and Figure 5 As shown, the extension direction of the first lever 14 is the second direction, and the extension direction of the second lever 15 is the third direction. As an example, for instance... Figure 1 and Figure 4 As shown, the movable component 13 has a second opening 131, and the first end of the first lever 14 is fitted into this second opening 131. Thus, when the movable component 13 moves along the first direction, the first end of the first lever 14 moves along the first direction. A third opening can be provided on the second end of the first lever 14, and the first end of the second lever 15 is fitted into the second end of the first lever 14 through this third opening. The extension direction of the first lever 14 is the third direction, and the extension direction of the second lever 15 is the second direction. By using the two levers in combination, the direction of force can be changed. Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As can be seen, the second end of the second lever 15 can push the first blocking member 21 along the first direction, moving it from the avoidance position to the blocking position. When the second end of the second lever 15 moves in the opposite direction of the first direction, the second lever 15 can drive the first blocking member 21 back to the avoidance position. Through the combination of the first lever 14 and the second lever 15, pushing can be achieved in a small space, and the required movement distance can be achieved by adjusting the length of the lever arms. To ensure the reliability of the linkage, the first blocking member 21 can be provided with a fourth opening, into which the second end of the second lever 15 extends to drive the first blocking member 21 to move. In addition, the first blocking member 21 can also be provided with a limiting hole 211, through which a positioning pin passes between the limiting hole 211 and the first frame plate 70, so that the first blocking member 21 can move along the direction of the limiting hole 211.

[0088] As an example, to ensure the reliability of the first blocking member 21, a first reset member 81 can be provided. This first reset member 81 is used to reset the first blocking member 21, allowing it to reset quickly and further ensuring the reliability of the interlocking mechanism. The first reset member 81 can be part of the second linkage structure. Here, the first reset member 81 can be a spring.

[0089] For the electrically controlled tripping circuit, the second linkage component also includes the aforementioned moving part 13. The first linkage structure can drive the moving part 13 to move. The second blocking part 22 is integrally formed with the moving part 13. This structure is easy to manufacture and relatively simple to implement. For the structure in which the moving part 13 and the second blocking part 22 are integrally formed, a reset part can also be provided. Of course, since the moving part 13 is close to the operated L-shaped rocker arm 11, its reliability is better, and a reset part can also be omitted. Figures 1 to 6 The illustration shows the movable element 13 without a reset element. The second blocking element 22 can be moved to a blocking position to press the micro switch 5 to disconnect the electric circuit of the tripping structure, or it can be moved to a clearance position to move away from the micro switch 5, allowing the electric circuit of the tripping circuit to operate. Here, the micro switch 5 can be part of an interlocking mechanism. The structure of the second blocking element 22 can be set according to actual needs, for example, as shown below. Figure 3 The part shown in the circle has an inclined surface that can be matched to the position of micro switch 5.

[0090] As an example, to ensure the reliability of the door lock plate 3's reset, a second reset member 82 can also be provided for the door lock plate 3. The second reset member 82 is used to reset the door lock plate 3 from the unlocked position to the locked position. This second reset member 82 can also be a spring.

[0091] Figures 1 to 6 The interlocking mechanism shown includes a first reset component 81 and a second reset component 82. This allows for the overall reset of the interlocking mechanism with fewer reset components, ensuring reliability, reducing costs, and simplifying the installation process.

[0092] As an example, to ensure the direction of movement of the movable member 13, a pin can also be provided on the first frame plate 70 of the vacuum circuit breaker. The structure of the movable member 13 can be set according to actual needs. For example, the portion with a plate-like part can move to fit against the panel 73 of the vacuum circuit breaker. More specifically, the panel 73 of the vacuum circuit breaker is provided with a second elongated hole, and the movable member 13 is provided with a third elongated hole 132. The number of the third elongated holes 132 can be selected according to actual needs, for example... Figure 3 and Figure 6The diagram shows two third elongated holes 132, through which pins are inserted, so that the moving part 13 can slide smoothly along the first direction.

[0093] As an example, the operating mechanism of the vacuum circuit breaker has a main shaft (not shown in the figure) for operating the vacuum circuit breaker to switch between the open and closed positions. A stop (not shown in the figure) is provided on the main shaft. When the vacuum circuit breaker is in the open position, the stop can block the movement of the moving member 13. When the vacuum circuit breaker is in the closed position, the stop can avoid the movement path of the moving member 13. Thus, when the vacuum circuit breaker is in the open position, the stop prevents the moving member 13 from moving, and consequently, the moving member 13 cannot push other components to move. Therefore, when the vacuum circuit breaker is in the open position, the linkage assembly cannot push the door lock plate 3 from the avoidance position to the blocking position, and the door lock plate 3 is in the locked position. Only when the vacuum circuit breaker is in the closed position can the linkage assembly move from the avoidance position to the blocking position, and the door lock plate 3 can move to the unlocked position. The interlocking between the stop on the main shaft and the moving part 13 can be achieved between the vacuum circuit breaker, the blocking part, and the door lock plate 3, further ensuring the reliability of the switch cabinet.

[0094] As an example, the switchgear also includes a limit mechanism (not shown in the figure). When the vacuum circuit breaker is in the open position, the limit mechanism can prevent the door lock plate 3 from moving from the locked position to the unlocked position. When the vacuum circuit breaker is in the closed position, the limit mechanism can avoid the movement path of the door lock plate 3. This limit mechanism can achieve interlocking between the vacuum circuit breaker and the door lock plate 3, thus ensuring that the door lock plate 3 can only move when the vacuum circuit breaker is closed. This further ensures the reliability of the switchgear.

[0095] As an example, such as Figures 1 to 6 As shown, the first end of the L-shaped rocker arm 11 extends from the panel 73 of the vacuum circuit breaker, allowing the operator to operate the first end of the L-shaped rocker arm 11 to move it between a first position and a second position.

[0096] The following specific examples illustrate the operation of the interlocking mechanism for switchgear according to the present invention. This interlocking mechanism includes both a manually controlled tripping structure and an electrically controlled tripping structure. For example... Figures 1 to 3 As shown, this is the case where the blocking element is in the avoidance position and the door lock plate 3 is in the locked position. Figures 4 to 6 The diagram shows the situation where the blocking element is in the blocking position and the door lock plate 3 is in the unlocked position. For ease of distinction, the blocking element corresponding to the manually controlled opening structure is referred to as the first blocking element, and the blocking element corresponding to the electrically controlled opening structure is referred to as the second blocking element.

[0097] like Figure 1 As shown, with the vacuum circuit breaker in the closed state, the operator can hold the first end of the L-shaped rocker arm 11 and lift it upwards to reach the second position. As the first end of the L-shaped rocker arm 11 moves upwards, it will cause the moving part 13 to move along the first direction as well.

[0098] In the manual control structure, as the moving part 13 moves along the first direction, it drives the first end of the first lever 14 to move along the first direction, and the second end of the first lever 14 to move in the opposite direction. This, in turn, drives the first end of the second lever 15 to move in the opposite direction. Thus, the second end of the second lever 15 moves along the first direction, thereby pushing the first blocking part 21 to move along the first direction onto the moving path of the tripping plate 41. At this point, even if the operator presses the tripping button, the tripping plate 41 cannot be activated, thus preventing the vacuum circuit breaker from tripping and keeping it in the closed state.

[0099] In the electrically controlled structure, as the moving part 13 moves along the first direction, it will drive the second blocking part 22 to move along the first direction, thereby contacting the micro switch 5. When the micro switch 5 is pressed, the electric circuit is disconnected, meaning that the operator cannot use electric control to open the vacuum circuit breaker, so the vacuum circuit breaker will always remain in the closed state.

[0100] Furthermore, since the bent portion of the L-shaped rocker arm 11 is hinged to the fixed portion, and the second end of the L-shaped rocker arm 11 is located in the arc-shaped hole 711, the movement of the first end of the L-shaped rocker arm 11 will cause the L-shaped rocker arm 11 to rotate, such as Figure 3 As shown, it rotates clockwise, and the second end moves along the arc-shaped hole 711, which in turn drives the rod-shaped part 12 to rotate counterclockwise. The door lock plate 3 moves along the third direction, that is, it moves into the cabinet of the switch cabinet. The protrusion 31 on the door lock plate 3 will no longer block the cable compartment door from opening. The operator can open the cable compartment door, for example, by lifting the cable compartment door upward and opening it outward.

[0101] At this time, the state of the interlocking mechanism is as follows: Figures 4 to 6 As shown. A hook (not shown in the figure) can be installed on the switch cabinet. A through hole 133 is provided on the first end of the L-shaped rocker arm 11. The hook hooks onto the through hole 133, so that the first end of the L-shaped rocker arm 11 is always kept in the lifted position.

[0102] Next, after inspecting the components inside the cable compartment, the workers removed the hook from the through hole 133. They then pressed down on the first end of the L-shaped rocker arm 11, causing the moving part 13 to move downwards.

[0103] For the manually controlled tripping structure, the movement of the moving part 13 will trigger the first end of the first lever 14 to move in the opposite direction of the first direction, the second end of the first lever 14 to move in the first direction, the first end of the second lever 15 to move in the first direction, and the second end of the second lever 15 to move in the opposite direction of the second direction, thereby driving the first blocking part 21 to move in the opposite direction of the first direction, and it will quickly return to its original position under the action of the first return spring. Figure 1 and Figure 2 The avoidance position is shown.

[0104] For the electric control structure, the movement of the moving part 13 will cause the second blocking part 22 to move in the opposite direction of the first direction, and the second blocking part 22 will move away from the micro switch 5, so that the micro switch 5 is in an unpressed state.

[0105] like Figure 6 As shown, the L-shaped rocker arm 11 rotates counterclockwise, which in turn drives the rod-shaped part 12 to rotate clockwise. The rod-shaped part 12 drives the door lock plate 3 to move from the unlocked position to the locked position, and under the action of the second reset member 82, it quickly returns to the locked position. For example, its protrusion 31 extends into the cable compartment door, preventing the cable compartment door from being lifted upward, so that the cable compartment door cannot be opened.

[0106] exist Figures 4 to 6 In the indicated state, the cable compartment door is closed, and the operator can trip the vacuum circuit breaker using either a manually controlled tripping mechanism or an electrically controlled tripping mechanism.

[0107] The present invention also provides a switch cabinet including any of the foregoing interlocking mechanisms for switch cabinets. This switch cabinet may be a gas-insulated switch cabinet.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An interlocking mechanism for a switchgear, the switchgear comprising a cable compartment door and a vacuum circuit breaker, the vacuum circuit breaker comprising a tripping structure for tripping the vacuum circuit breaker, characterized in that, The tripping structure corresponds to a blocking element, and the interlocking mechanism includes: A linkage component that can drive the blocking member to move and a door lock plate (3) to move; The blocking member is movable between a blocking position and a yielding position. When the blocking member is in the blocking position, it can block the tripping structure. When the blocking member is in the yielding position, the tripping structure can be used to trip the vacuum circuit breaker. The door lock plate (3) is used to move between a locked position for locking the cable chamber door and an unlocked position for unlocking the cable chamber door. When the blocking member is in the blocking position, the door lock plate (3) can be in the unlocked position. When the blocking member is in the avoidance position, the door lock plate (3) can be in the locked position.

2. The interlocking mechanism according to claim 1, characterized in that, The linkage component includes: A first linkage structure is used to drive the door lock plate (3) to move between the locked position and the unlocked position; A second linkage structure is provided, wherein the first linkage structure can drive the second linkage structure to move, and the second linkage structure is used to drive the blocking member to move between a blocking position and an avoidance position.

3. The interlocking mechanism according to claim 2, characterized in that, The first linkage structure includes: An L-shaped rocker arm (11) is rotatable along a first axis (61), and the first end of the L-shaped rocker arm (11) is movable between a first position and a second position; A rod-shaped part (12) is provided, and the L-shaped rocker (11) can drive the rod-shaped part (12) to rotate along a second axis (62). During the rotation, the rod-shaped part (12) can drive the door lock plate (3) to move between the locked position and the unlocked position. The first axis (61) is parallel to the second axis (62).

4. The interlocking mechanism according to claim 3, characterized in that, The bent part of the L-shaped rocker (11) is hinged to a fixed plate (71), and the second end of the L-shaped rocker (11) is hinged to the rod-shaped part (12). The fixed plate (71) has an arc-shaped hole (711). The part of the L-shaped rocker (11) that is hinged to the rod-shaped part (12) can slide along the arc-shaped hole (711). The rod-shaped part (12) is hinged to the fixed plate (71).

5. The interlocking mechanism according to claim 2, characterized in that, The tripping structure includes a tripping button and a tripping plate (41). The tripping button can push the tripping plate (41) to trip the vacuum circuit breaker. When the blocking member is in the blocking position, the blocking member is located on the moving path of the tripping plate (41). The second linkage structure includes: A movable component (13), wherein the first linkage structure can drive the movable component (13) to move; A lever structure, wherein the movable element (13) is capable of triggering the lever structure to move, and the lever structure is capable of pushing the blocking element to move.

6. The interlocking mechanism according to claim 5, characterized in that, The lever structure includes: A first lever (14), the movement of the rocker structure can drive a moving part (13) to move, the moving part (13) can drive the first end of the first lever (14) to move; A second lever (15) is provided, wherein the second end of the first lever (14) can drive the first end of the second lever (15) to move, and the second end of the second lever (15) can drive the blocking member to move between the avoidance position and the blocking position.

7. The interlocking mechanism according to claim 2, characterized in that, The tripping structure includes an electric circuit and a micro switch (5). The micro switch (5) is connected in series with the electric circuit. When the blocking member is in the blocking position, the blocking member can trigger the micro switch (5) to disconnect the electric circuit. The second linkage component includes: a movable part (13), the first linkage structure can drive the movable part (13) to move, and the blocking part is integrally formed with the movable part (13).

8. The interlocking mechanism according to claim 1, characterized in that, Also includes: A first reset member (81) is used to reset the blocking member from the blocking position to the yielding position; and / or A second reset member (82) is used to reset the door lock plate (3) from the unlocked position to the locked position.

9. The interlocking mechanism according to claim 1, characterized in that, Also includes: The operating mechanism of the vacuum circuit breaker has a main shaft for operating the vacuum circuit breaker to switch between the open and closed positions. The main shaft is equipped with a stop portion. When the vacuum circuit breaker is in the open position, the stop portion can block the movement of the moving part (13). When the vacuum circuit breaker is in the closed position, the stop portion can avoid the movement path of the moving part (13); and / or The switch cabinet also includes a limiting mechanism. When the vacuum circuit breaker is in the open position, the limiting mechanism can prevent the door lock plate (3) from moving from the locked position to the unlocked position. When the vacuum circuit breaker is in the closed position, the limiting mechanism can avoid the movement path of the door lock plate (3).

10. A switch cabinet, characterized in that, Includes the interlocking mechanism for switchgear as described in any one of claims 1-9.

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